PROCEDURE FOR THE PICO-CELL POWER ADJUSTMENT AND EQUIVALENT BASIS STATION

CELLULAR WIRELESS COMMUNICATION SYSTEM FOR COMMUNICATION BETWEEN BASE STATIONS AND MOBILE OR FIXED TERMINALS

A cellular wireless communication system is disclosed providing communication between base stations 6 and mobile or fixed terminals. A fixed installation has a fixed directional antenna 4 directed at a predetermined base station 6. An interface 10 is provided for connecting the mobile terminal 16 to the antenna 4. When the interface is connected to the mobile terminal, information transmitted on the up link signalling channel including an indication that the fixed antenna is in use. This allows a subscriber to use one mobile telephone set for both fixed and mobile communications, so having only one account, and allows the telephone service provider to reduce the charging rate for the fixed service to a level which is competitive with service provided via landline.

PICOCELL POWER CONTROL

A method is provided of controlling transmission power of a picocell base station. The method comprises the steps of the picocell base station: transmitting a signal at a first power; receiving a report from a mobile terminal that the signal is received within a predetermined quality range; dependent upon receiving said report instructing the mobile terminal to report as to the number of neighboring macrocells detected by the mobile terminal; and controlling the transmission power of a further signal dependent upon said number.

SELECTING A HANDOVER ALGORITHM

The present invention provides methods for selecting a handover algorithm. The methods may include selecting the handover algorithm for a mobile unit based on at least one measurement indicative of a network state. The methods may also include receiving information indicative of the handover algorithm selected based on the measurement(s) indicative of the network state.

Timing estimation for GSM bursts based on past history

Crankcase vertical-horizontal composite type multi-station combined machine tool

The invention discloses a crankcase vertical-horizontal composite type multi-station combined machine tool which comprises a base (10), a hydraulic rotation workbench (11), a rotary table expansion plate (12), a cooling chip removing system (6), a lubricating system (7), a oil press (8) and an electric system (9). The hydraulic rotation workbench (11) and the rotary table expansion plate (12) are mounted on the base (10). The cooling chip removing system (6) is connected with the hydraulic rotation workbench (11). The crankcase vertical-horizontal composite type multi-station combined machine tool has the advantages that the machine tool is reasonable in structural design, simple to operate, high in mechanization degree, high in work efficiency and low in machining cost; the whole combined machine tool adopts the hydraulic rotation workbench with six machining stations which can machine at the same time and load and unload workpieces, the whole machine process only needs clamping and positioning ...

Heavy oil blockage preventer for protector of electric submersible pump

The invention relates to a heavy oil blockage preventer for a protector of an electric submersible pump and aims to overcome the defects that blockage of a breather of the protector by heavy oil mass during use of the electric submersible pump in heavy oil production causes damage of the electric submersible pump and causes failure of normal production. A stirring wheel and a screen plate assembly are fixedly mounted on a shaft in an inner cavity of an upper connector from top to bottom; the upper connector is provided with two radial through holes over the stirring wheel; an outflow one-way valve and an inflow one-way valve are fixed in the radial through holes, respectively; a screen plate of the screen plate assembly is fixed to the end face of a fixing sleeve through screws; the screen plate is in the shape of a round plate and provided with axial mesh pores. The heavy oil blockage preventer has the advantages that the structure is reasonable, heavy oil blockage resistance of the protector ...

Trapezoidal-block embankment structure

The invention discloses a trapezoidal-block embankment structure and relates to an embankment structure of embankment engineering. In the technical scheme, the embankment structure is formed by arranging trapezoidal blocks with a complete block in the cross-section direction on a foundation bed and carrying out longitudinal and continuous arrangement and connection on the blocks gradually; each trapezoidal block is a block body with the cross-section direction being similar to trapezoid and the whole body being similar to a trapezoidal prism; the included angles between the slope surfaces of the two horizontal sides of each trapezoidal block and the horizontal plane are not larger than 60 degrees, and are larger than or equal to 18 degrees and smaller than or equal to 45 degrees when waves are larger; the height of straight walls at the two horizontal sides of each trapezoidal block is not more than 1/3 of the height of each trapezoidal block; wave-absorbing and pressure-releasing holes ...

SELECTING A TARGET CELL FOR A BLIND HANDOVER

The present invention provides methods for selecting a target cell for a blind handover. The methods may include selecting at least one target cell for a blind handover of a first mobile unit based on at least one measurement performed by the first mobile unit or at least one second mobile unit for at least one measurement-based handover.

Gallium solenoid micro-coil with circular cross section based on bonding of capillary tube and double-faced adhesive tape and preparation method of micro-coil

The invention discloses a gallium solenoid micro-coil with a circular cross section based on bonding of a capillary tube and a double-faced adhesive tape and a preparation method of the micro-coil. The micro-coil comprises a three-layer structure which orderly comprises a capillary tube inner layer (10), a double-faced adhesive tape middle layer (20) and a double-faced adhesive tape outer layer (30) from inside to outside; a sample cavity (11) is formed in the capillary tube inner layer (10); a solenoid micro-coil cavity (21) is formed in the double-faced adhesive tape middle layer (20); a first bonding pad cavity (31) and a second bonding pad cavity (32) are formed in the double-faced adhesive tape outer layer (30). The gallium solenoid micro-coil is capable of effectively solving the problems of high process complexity, high fabrication cost and the like of the existing solenoid micro-coil without scarifying high magnetic field application and under the premise of accurately distinguishing ...

Method for determining aluminum electrolyser aluminum liquid height

The invention relates to a new method for measuring aluminum liquid height in daily management of electrolytic cell in aluminum smelting industry. The invention comprises following procedures. 1) Measuring support is set on the furnace platform of aluminum outputting port of electrolytic cell. 2) The front end of measuring drill inserts into electrolyte to measure the boundary of electrolyte and aluminum liquid. 3) The distance x between the boundary and the line at the root of measuring drill. 4) Aluminum liquid height h-x is calculated. The invention is provided with following merits. 1) Measuring height and measuring tool are unified and measuring position is not restricted. 2) Because there is no need to contact with the furnace bottom by measuring drill measuring error generated by drill tip melting because of over large local current when the tip of measuring drill often contacts with the furnace bottom can be avoided. 3) It is available for improve the situation of furnace bottom ...

Probe based on integration of gallium solenoid mini-type coil and glass micro-flow channel as well as preparation method of probe

The invention discloses a probe based on integration of a gallium solenoid mini-type coil and a glass micro-flow channel as well as a preparation method of the probe. The probe comprises five layers of glass structures, namely a bottommost layer, a sub-bottom layer, a middle layer, a sub top layer, and a topmost layer sequentially from the bottom up, wherein a first bonding pad cavity, a second bonding pad cavity and a down-lead cavity queue are arranged on the bottommost layer; a first column cavity queue and a sixth column cavity queue are arranged on the sub-bottom layer; a second column cavity queue, a sample cavity and a fifth column cavity queue are arranged on the middle layer; a second sample inlet, a third column cavity queue, a second sample outlet and a fourth column cavity are arranged on the sub top layer; a first sample inlet, a first sample outlet and an up-lead cavity queue are arranged on the top layer. The probe provided by the invention has the advantages that lateral ...

High-efficiency PPC synthesis device

The invention discloses a high-efficiency PPC synthesis device, and belongs to the technical field of PPC synthesis. The device comprises a first polymerization kettle, a second polymerization kettle, a sprayer, a mixing pump, a PPC kettle liquid collecting tank, a coaxial valve and a three-way valve. After epoxypropane and a catalyst A are mixed in a mixing pump, mixed liquid is introduced into a sprayer, the sprayer atomizes the mixed liquid, the atomized mixed liquid is introduced into a first polymerization kettle through a coaxial valve, carbon dioxide is introduced into the two polymerization kettles respectively under the action of a three-way valve, a catalyst B is added into a second polymerization kettle, the pressure is increased, and the mixture is stirred to be uniform. The unreacted propylene oxide in the first reaction kettle is catalyzed, and the PPC kettle liquid is collected by the PPC kettle liquid collecting tank. The method has the beneficial effects that in the first ...

Picocell power control

A method is provided of controlling transmission power of a picocell base station. The method comprises the steps of the picocell base station: transmitting a signal at a first power; receiving a report from a mobile terminal that the signal is received within a predetermined quality range; dependent upon receiving said report instructing the mobile terminal to report as to the number of neighboring macrocells detected by the mobile terminal; and controlling the transmission power of a further signal dependent upon said number.

FEMTO ZELLENBASISSTATION AND PROCEDURES FOR MANUFACTURING FEMTO CELLS A ROUND TRANSMIT CHANNEL JET

TIMING ESTIMATION FOR GSM BURSTS BASED ON PAST HISTORY

There is disclosed a method and apparatus for estimating the timing position of data bursts received in a data stream, where each data burst includes a number of bits comprising a training sequence in a fixed location. The receiver includes circuitry for estimating the timing position of the data bursts received in the data stream. For each of the first N received data bursts, the receiver estimates a plurality of timing locations of the training sequence, correlates the training sequence for each estimated timing location, and determines the timing location associated with the highest correlation value. The receiver then determines the average timing location of the highest correlation values for each of the first N data bursts. For the next M data bursts the receiver estimates the timing location of each data burst based on the average timing location for the first N data bursts.

Burst tower section of thick bamboo welding system

The utility model provides a burst tower section of thick bamboo welding system, includes tower section of thick bamboo piece, first flange board, second flange board and welding frock, and first flange board relatively sets up on tower section of thick bamboo piece with second flange board, and the welder loads onto and is equipped with first spacing groove and second spacing groove, and the welder installs and places in between first flange board and the second flange board, and one side margin position of first flange board is at a limiting groove, and one side margin position of second flange board is at the 2nd limiting groove. The utility model discloses a burst tower section of thick bamboo welding system can effectively eliminate the contained stress that rigid fastening brought, and the welding deformation of ability control flange board is at the within range of scheming the paper size.

Selecting a target cell for a blind handover

The present invention provides methods for selecting a target cell for a blind handover. The methods may include selecting at least one target cell for a blind handover of a first mobile unit based on at least one measurement performed by the first mobile unit or at least one second mobile unit for at least one measurement-based handover.

Preparation method of isopentenol

The invention discloses a preparation method of isopentenol. The method comprises the following steps: slowly adding isoprene into a system consisting of an organic carboxylic acid and corresponding salt, wherein the Ka value of the system is greater than 10<-4> relative to water; continuously stirring at room temperature till reaction is completed, and extracting and separating out isoamylene chloroacetate; and adding a strongly basic alcohol-water solution into isoamylene chloroacetate to carry out hydrolysis at room temperature, and after reaction is completed, extracting and separating impurities to obtain isoamyl alcohol. The preparation method can be carried out at normal temperature and normal pressure. Compared with industrially common synthetic method of isoamyl alcohol by a hydrogen chloride method, the method does not need high temperature and high pressure, is short in the process flow, mild in the reaction condition, and is improved in terms of safety and stability.

Iterative Zeitabschätzung für GSM-Bursts

Cellular wireless communication system with fixed terminals

TIMING ESTIMATION FOR GSM BURSTS BASED ON PAST HISTORY

There is disclosed a method and apparatus for estimating the timing position of data bursts received in a data stream. where each data burst includes a number of bits comprising a training sequence in a fixed location. The receiver includes circuitry for estimating the timing position of the data bursts received in the data stream. For each of the first N received data bursts, the receiver estimates a plurality of timing locations of the training sequence, correlates the training sequence for each estimated timing location, and determines the timing location associated with the highest correlation value. The receiver then determines the average timing location of the highest correlation values for each of the fast N data bursts. For the next M data bursts the receiver estimates the timing location of each data burst based on the average timing location for the first N data bursts.

ITERATIVE ESTIMATION OF TIMING IN GSM BURSTS

There is disclosed a method and apparatus for estimating the timing position of data bursts received in a data stream, where each data burst includes a number of bits comprising a training sequence in a fixed location. The receiver includes circuitry for, in respect of each received data burst, estimating at least one position of the timing location of the training sequence, equalising the data burst for each estimated position, and correlating each equalised data burst. Where a plurality of positions of the timing location of the training sequence are estimated, the receiver circuitry, for each received data burst, determines the correlation result having the highest value and retains the equalised data burst associated with the correlation result having the highest value.

ITERATIVE ESTIMATION OF TIMING IN GSM BURSTS

There is disclosed a method and apparatus for estimating the timing position of data bursts received in a data stream, where each data burst includes a number of bits comprising a training sequence in a fixed location . The receiver includes circuitry for, in respect of each received data burs t, estimating at least one position of the timing location of the training sequence, equalising the data burst for each estimated position, and correlating each equalised data burst. Where a plurality of positions of the timing location of the training sequence are estimated, the receiver circuitry, for each received data burst, determines the correlation result having the highest value and retains the equalised data burst associated with the correlation result having the highest value.

Small-scale combined wheat washing equipment and small-scale combined wheat washing method

The invention discloses small-scale combined wheat washing equipment and a wheat washing method thereof. The wheat washing method mainly comprises the following steps: plane rotary sieving, stone removing, coarse wheat washing, secondary wheat washing, final wheat washing, wheat wetting and wheat wiping. Through the adoption of the method, the problems of large water consumption, serious pollution, low washing quality and the like of washing via a wet method of the current small and medium flour processing enterprises can be effectively solved. Through the adoption of the small-scale combined wheat washing equipment, the movement route of wheat flows in the washing is changed, a traditional single-stage rinsing technology is replaced with classified washing technology, so that the wheat flows are subjected to multiple-stage rinsing in sequence, the washing is more thorough, and recycling water effectively is realized via water circulation. Compared with the traditional washing technology ...

Constant-flow bubble type automatic water level measurement method

The invention belongs to the field of sensor measurement, and in particular relates to a method for automatically measuring water level by adopting a constant-flow bubble type water gauge, which comprises the following steps: measuring vertical height difference H of two ports of an air duct and mounting height h0 of an air exhaust; inputting a gravity acceleration g, the height difference H of the two ports of the air duct and the mounting height h0 of the air exhaust into a data acquisition device through a register; acquiring a pressure output value P0 of the constant-flow bubble type water gauge and a gas temperature T in the duct by the data acquisition device in fixed time; and acquiring a pressure output value PA of a barometer by the data acquisition device in fixed time. The invention provides the method more accurate than classic pressure water level relation conversion formula, and discloses that the vertical height difference of the two ports of the air duct is the main reason ...

Iterative timing of GSM bursts

Operation risk intelligent management and control method and device based on key process model

The invention discloses an intelligent operation risk management and control method and device based on a key process model, and the method comprises the steps: determining a target construction operation according to an operation management and control instruction; according to the operation information corresponding to the target construction operation and the basic operation configuration information, screening out a target basic operation matched with the target construction operation from the basic operation set; determining key process information corresponding to the target basic operation according to the basic operation process analysis condition; determining management and control processing information corresponding to the key process information according to the process management and control processing conditions, and taking the management and control processing information as an operation risk management and control analysis result corresponding to the target construction ...

Method and apparatus for packet wireless telecommunications

In a wireless telecommunications network, a Code Division Multiple Access (CDMA) scheme is applied to data to encode it. The encoded data transmitted in the uplink using an Orthogonal Frequency Division Multiplexing (OFDM) frame structure including a cyclic prefix (CP). The CDMA encoded data may be time multiplexed with Single Carrier-Frequency Division Multiple Access (SC-FDMA) transmissions. The CDMA transmissions may be used for relatively small payloads, such as those associated with voice traffic and control signals, and the SC-FDMA transmissions used for higher date rate transmissions. This enables autonomous transmission, without scheduling, for smaller payloads. A transmitter includes a selector 3 for performing time multiplexing in the uplink, the required mode being indicated by the Hybrid Automatic Repeat Request (HARQ) ID. A first branch 1 carries SC-FDMA data and a second branch 2 carries data to be transmitted as a CDMA scheme. A CAZAC code may be used in encoding the CDMA ...

ITERATIVE TIMING ESTIMATION OF GSMBURSTS

PURPOSE: A method and apparatus is provided for estimating the timing position of data bursts received in a data stream, where each data burst includes a number of bits comprising a training sequence in a fixed location. CONSTITUTION: A receiver includes circuitry for, in respect of each received data burst, estimating at least one position of the timing location of the training sequence, equalizing the data burst for each estimated position, and correlating each equalized data burst. Where a plurality of positions of the timing location of the training sequence are estimated, the receiver circuitry, for each received data burst, determines the correlation result having the highest value and retains the equalized data burst associated with the correlation result having the highest value. COPYRIGHT 2000 KIPO ...

Selecting a handover algorithm

The present invention provides methods for selecting a handover algorithm. The methods may include selecting the handover algorithm for a mobile unit based on at least one measurement indicative of a network state. The methods may also include receiving information indicative of the handover algorithm selected based on the measurement(s) indicative of the network state.

Iterative Zeitabschätzung für GSM-Bursts

Timing estimation for GSM bursts based on past history

Abandon wind power assessment method based on wind resource real-time measurement data

Adjustable lens rack structure

The invention provides an adjustable lens rack structure which is composed of a lens frame, an adjusting base and a bottom board, wherein the lens frame and the adjusting base are located through a square groove and can slide in the opening direction of the square groove to be horizontally adjusted front and back, the adjusting base and the bottom board are located through a rotary shaft, the adjusting base can rotate around a shaft hole of the bottom board, and then the position of a lens can be adjusted. Two L-shaped symmetrical through grooves are formed in the side face of the adjusting base, the groove slot deformation is controlled by adjusting tightness of two screws, and pitching adjustment of the lens can be achieved. The bottom board is provided with a long-strip-shaped hole and can move horizontally. By means of the adjustable lens rack structure, two-dimensional angle adjustment of the lens can be achieved conveniently, two-dimensional angle adjustment is carried out in an orthogonal ...

Iterative timing of GSM bursts

Cellular radio communication system with fixed terminal

Microservice-based log level adjustment method and device

The invention discloses a log level adjustment method and device based on micro-services, and the method comprises the steps: obtaining the level adjustment demand information of a target micro-service, and determining a predicted log level according to the level adjustment demand information and the configuration information of the target micro-service; according to the predicted log level and the configuration information, log level adjustment operation is executed on the target micro-service, a log level adjustment result is obtained, and the level adjustment demand information comprises one or more of service information, adjustment instruction information and adjustment operation information; the configuration information comprises node information and/or port information corresponding to the target micro-service. It can be seen that the intelligent adjustment function of the micro-service log level can be achieved, the comprehensiveness and reasonability of the micro-service log level ...

Power transmission line intelligent detection system based on image recognition technology

The invention belongs to the field of detection, and discloses a power transmission line intelligent detection system based on an image recognition technology, and the system comprises an image segmentation module which comprises an acquisition unit, a calculation unit, a screening unit and a segmentation unit. The acquisition unit is used for acquiring a screening image set corresponding to the power transmission line detection image; the calculation unit is used for calculating an image comprehensive coefficient of each element; the screening unit is used for acquiring an element with the maximum image comprehensive coefficient; the segmentation unit is used for carrying out image segmentation on the power transmission line detection image to obtain a pre-segmented image. According to the method, the image with the noise information as little as possible can be selected for image segmentation during image segmentation, so that the accuracy of the segmentation result is improved.

Cellular wireless communication system with fixed terminals

A self-protective lead-acid storage battery and its manufacture method

The disclosed preparation method for self-shielded lead-acid battery comprises: (1) setting in turns the positive plate, baffle plate and the negative plate in different shell slots, and connecting the negative plate with the next positive plate serially; and (2) paralleling at least one by-pass circuit between every positive and negative plates for shunting during charging when the charging voltage up to near or up to a threshold. This invention can prevent the over-charge or less-charge, and improves the service time of lead-acid battery greatly.

Multi-channel video coding-decoding system for video monitoring and transmission method

The invention discloses a double IP interface multi-channel video coding-decoding system for video monitoring, which comprises a plurality of video coding modules connected with a double IP main control module and a plurality of video decoding modules connected with the other double IP main control module, wherein each double IP main control module comprises a multi-channel digital video stream multiplexing module and a command analysis module which are connected with a kilomega IP interface and a hundred-mega IP interface respectively, thereby the image stream and the control stream, independent to each other physically and logically, are transmitted by the kilomega and the hundred-mega IP interfaces. The system possesses the multi-channel video interface capability; and due to the double IP interfaces, the image stream and the control stream are independent to each other physically and logically; and because the video service stream and the control stream are separately processed, the ...

Special mechanism collision prediction method based on virtual prototype in interstage separation test

The invention belongs to the field of aerospace, and discloses a special mechanism collision prediction method based on a virtual prototype in an interstage separation test. According to the special mechanism collision prediction method, three-dimensional digital models of a test section, a mechanism and a separated body are established and used for predicting collision in the test process; a virtual machine system which is independent of a control system and better in graphic calculation is established, the virtual machine system carries out communication through a high-speed communication protocol, and a small amount of PLC resources can be occupied when collision prediction is carried out; real-time display is carried out through a computer OpenGL or DirectX technology, so that a user can monitor the whole movement process in real time and even manually intervene in collision prediction; and during intersection calculation of the triangular patch primitives, only the triangular patches ...

Method for preparing aryl 5-pyrazolone

The invention discloses a method for preparing aryl 5-pyrazolone. Aryl hydrazine or hydrochloride of aryl hydrazine is used as a raw material and reacted with ethyl acetoacetate in a water dispersion system by adopting a measure of avoiding oxidation of the aryl hydrazine to prepare the specific aryl 5-pyrazolone.The method for preparing the aryl 5-pyrazolone is easy to operate and easy for post treatment, and has the advantages of mild reaction condition, simple step, high product purity and high yield. The invention also relates to application of the method in organic synthesis.

Method for obtaining temperature-sensitive sterile line by performing site-specific mutagenesis on P/TMS12-1 through CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 system

The invention discloses a method for obtaining a temperature-sensitive sterile line by performing site-specific mutagenesis on P/TMS12-1 through a CRISPR (clustered regularly interspaced short palindromic repeats)/Cas9 system. The method comprises the following steps: cloning and controlling a Pei'ai 64S temperature-sensitive sterile major gene P/TMS12-1 fragment; designing a target sequence according to the P/TMS12-1 sequence; constructing a pU3-gRNA carrier of the target-containing sequence fragment; constructing a pCRISPR/Cas9 carrier; obtaining a positive transgenic seedling by utilizing the pCRISPR/Cas9 carrier containing the target sequence fragment; screening a mutant plant from the positive transgenic seeding; performing subculture planting on the mutant plant to obtain the temperature-sensitive sterile line without transgenic components. According to the method disclosed by the invention, the CRISPR/Cas9 system is utilized to completely inactivate P/TMS12-1 non-coding RNA, and ...

Anti-cheating sign-in method and device based on two-dimensional code

The invention discloses an anti-cheating sign-in method and device based on a two-dimensional code, and the method comprises the steps: generating a latest two-dimensional code corresponding to a latest two-dimensional code obtaining request when the latest two-dimensional code obtaining request sent by a two-dimensional code obtaining terminal is received; determining at least one sign-in request of the latest two-dimensional code according to the latest two-dimensional code; each sign-in request exists in the corresponding two-dimensional code scanning terminal and is a request obtained after the corresponding two-dimensional code scanning terminal scans a latest two-dimensional code; determining the sign-in type of the sign-in request according to each sign-in request and the latest two-dimensional code acquisition request; the sign-in type comprises a sign-in success type or a sign-in failure type. Therefore, the accuracy of determining the sign-in type of the sign-in request can be ...

Heat recovery system and method suitable for ultra (ultra) critical boiler low-load wet-state operation

The invention discloses an energy recovery system and method suitable for low-load wet-state operation of a supercritical (ultra-supercritical) boiler, and the system comprises a water storage tank, an atmosphere flash tank, a heat accumulator, a heat conduction oil storage tank, a feed water heater, a steam-water separator, a water feed pump, a deaerator and the supercritical (ultra-supercritical) boiler, and the supercritical (ultra-supercritical) boiler and the water storage tank form a loop. The water storage tank is further sequentially connected with an atmosphere flash tank and a condensation water tank through pipelines; a branch pipeline between the water storage tank and the atmosphere flash tank is connected with the heat accumulator, the heat accumulator, the heat conduction oil storage tank and the heat source side of the feed water heater form a loop, and a water inlet of the water supply side of the feed water heater is connected with the deaerator through the water supply ...

Visual configuration method and device for index paraphrasing and computer storage medium

The invention discloses a visual configuration method and device for index paraphrasing and a computer storage medium. The method comprises the steps that index configuration information corresponding to all indexes is created according to a preset paraphrasing rule; generating at least one widget according to the business function requirement; for each widget in all the widgets, determining all target indexes corresponding to the widget, and associating index configuration information corresponding to all the target indexes to the widget; and when a touch operation based on the specific screen area is detected, determining a target widget corresponding to the specific screen area, and displaying at least part of index configuration information associated with the target widget. Visibly, by implementing the method, the index configuration information can be displayed through the target widget, so that a user can quickly master the indexes and logics behind the corresponding data, and then ...

Light-responsive LED based on GaN/CsPbBrxI3-x heterojunction, and preparation method and application thereof

A light-responsive LED (Light Emitting Diode) based on a GaN/CsPbBrxI3-x heterojunction, a preparation method and an application thereof are provided. The light-responsive LED consists of a GaN base layer on a sapphire substrate, an all-inorganic perovskite CsPbBrxI3-x film, an indium electrode and a carbon electrode, forming an In/GaN/CsPbBrxI3-x/C structure, wherein: in the CsPbBrxI3-x film, 0 Подробнее

Verfahren zur Picozellen-Leistungsregelung und entsprechende Basisstation

Control circuit

The utility model discloses a control circuit, including first chip, second chip, first resistance, second resistance, third resistance and electrostatic protection circuit, first chip includes the first clock foot, first data foot and hot plug pin, the second chip includes second clock foot, second data foot and standby signal foot, the the first clock foot is connected with the second clock foot, first data foot is connected with second data foot, the hot plug pin is connected with first data foot, standby signal foot is connected with the second clock foot, first ohmic connection the hot plug pin with between the first data foot, the second ohmic connection standby signal foot with between the second clock foot, the third ohmic connection is not between first data foot and signal ground, the electrostatic protection circuit is connected with the first clock foot, first data foot respectively. The utility model discloses technical scheme can save the pin resource of chip, optimizes the ...

Power equipment abnormity early warning method and device

The invention discloses a power equipment abnormity early warning method and device, and the method comprises the steps: obtaining a real-time state data set monitored by an abnormity monitoring device, and the real-time state data set comprises the real-time state data corresponding to each power equipment in a preset region; judging whether target state data meeting a preset abnormal condition exists in the real-time state data set or not; when it is judged that the target state data meeting the preset abnormal condition exists in the real-time state data set, target power equipment corresponding to the target state data is determined, and a target early warning instruction matched with the target state data is sent to the target power equipment, and triggering the target power equipment to execute an operation matched with the target early warning instruction. It can be seen that when it is pre-judged that the power equipment is abnormal, effective response can be taken in time, the ...

Fire-fighting equipment state monitoring system, method and device

The invention discloses a fire-fighting equipment state monitoring system, method and device, and the system comprises a monitoring device which comprises an alarm module, a communication module and at least one sensing module, the at least one sensing module is used for monitoring at least one state data of fire-fighting equipment, and the at least one sensing module is in one-to-one correspondence with the at least one state data, the communication module is used for reporting at least one type of state data; the abnormity recognition device is used for receiving the at least one type of state data reported by the communication module, judging whether the fire fighting equipment is abnormal or not according to the at least one type of state data, and sending an alarm instruction to the alarm module when the fire fighting equipment is judged to be abnormal, and the alarm instruction is used for indicating the alarm module to carry out alarm processing. Therefore, through multi-terminal ...

Logic encryption for integrated circuit protection

A method for encrypting logic includes generating, by a computing system, locking logic for inclusion in a logic circuit. The locking logic is generated based at least in part on an error rate and an attack complexity. The method also includes inserting, by the computing system, a one-way function into the locking logic. The method further includes applying, by the computing system, obfuscation logic to the logic circuit, where the obfuscation logic is applied on top of the locking logic.

Zeitabschätzung für GSM-Bursts auf Grundlage zuvor ermittelter Durchschnittswerte

Pilot-operated type water-saving closestool

The invention relates to a pilot-operated type water-saving closestool, in particular to a hydraulic tipping-bucket closestool, which is characterized in that a closestool base with a cavity is arranged on the lower part of the closestool body; a tipping bucket is articulated on a support in the base and positioned below the closestool body; at least a pilot-operated type water-control device which can control critical points of the tipping bucket and tipping bucket counterweight is arranged on the tipping bucket; a pilot water channel is arranged in a flushing water channel in the cavity of the closestool base. The pilot-operated type water-saving closestool is an improvement of the tipping-bucket closestool, which introduces the idea of pilot-operated type to facilitate the closestool to be stable and reliable. Under static state of the closestool, the tipping bucket can not be tipped when adding substances heavier than certain tipping bucket counterweight to the tipping bucket, which ...

Resource management system supporting the probability guarantee of end-to-end delay and the method thereof

The invention discloses a resource management system supporting the probability guarantee of end-to-end delay and the method thereof, which mainly address the problem of excessive resource occupation in deterministic QoS. The system comprises a policy resource manager (PRM) module (11) and a router module (12). The policy resource manager (PRM) module calculates the bandwidth resource allocation parameters of respective end-to-end links of a transmission path based on the service request information, the mapping relationship between 'the bandwidth allocation and the packet delay distribution' and the real-time status information about the load over a link; the router module calculates the mapping relationship between 'the bandwidth allocation and the packet delay distribution', allocates the bandwidth resources based on the bandwidth resource allocation parameters of respective end-to-end links of the service transmission path and allocates the parameter shares and transmits service data ...

Performance management KPI system of electric transmission and transformation devices

The invention discloses a performance management KPI system of electric transmission and transformation devices. The performance management KPI system comprises a performance management center, a distributing module, a characteristic element collecting module, a KPI calculating module and a KPI feedback module. According to the performance management KPI system, online or real-time calculation of performance management KPIs of the electric transmission and transformation devices can be efficiently, scientifically and reasonably achieved according to requirements, calculation results are saved into the performance management center, various inquiring interfaces are formed, power grid production persons or scientific research persons can conveniently calculate the performance management KPIs of the electric transmission and transformation devices according to working conditions and the working requirements, in this way, accurate strategies can be easily developed for the electric transmission ...

Ultraprecision machining technique of sapphire substrate for high-power light-emitting diode (LED)

The invention relates to the technical field of a processing method for photoelectronic devices, in particular to an ultraprecision machining technique of a sapphire substrate for a high-power light-emitting diode (LED) gallium nitride (GaN). The technique mainly comprises a sapphire plastic region grinding technique and a sapphire nano-scale chemically mechanical polishing technique. The invention also relates to special corrosive liquid and special polishing liquid applied in the process of processing the sapphire substrate. The special corrosive liquid consists of sulfuric acid, phosphoric acid and nitric acid. The special polishing liquid consists of sol type silica (SiO2), polyoxyethylene lauryl ether, olive oil, alcohol amine and deionized water. By the technique, the sapphire substrate which does not have damaged layers and has complete crystal lattices can be prepared; the surface roughness is below 0.2 nanometer; and the quality requirement of the sapphire substrate required by ...

Portable operation grounding rod

A portable operation grounding rod disclosed by the present invention comprises a mounting mechanism, the mounting mechanism comprises a mounting block, a clamping groove formed in the outer side of the mounting block, and a limiting part arranged in the mounting block, the outer side of the limiting part is adaptively provided with a reset part, the mounting block is internally provided with a transmission part, and the transmission part is connected with the clamping groove. A blocking part is arranged in the mounting block; in the actual operation process, all-directional fixation of the cable can be completed only by stretching the holding rod upwards with one hand and then pulling the holding rod downwards, the mode is simple and convenient to operate, it can be guaranteed that the cable is not damaged while the device and the cable are firmly connected, and the cable is not damaged. Therefore, the safety of workers during maintenance is ensured, the service life of the cable is prolonged ...

Sum and difference mode antenna and communication product

The present application relates to a sum and difference mode antenna, comprising first and second radiators, and first and second excitation sources. The first radiator comprises a first segment and a second segment. A gap is formed between the first segment and the second segment. The first excitation source is used for feeding the first radiator, so that the currents in the first segment and in the second segment both flow in a first direction. The second radiator comprises a third segment, a fourth segment, and a fifth segment. The third segment and the fourth segment are symmetrically distributed at two sides of a connection end of the fifth segment. The second excitation source is electrically connected to the feed end of the fifth segment to feed the second radiator, so that the current in the fifth segment flows in a second direction, the direction of the current in the third segment is opposite to the first direction, the direction of the current in the fourth segment is the first ...

Method and device for estimating GSM pulse train in data stream

Hydropower station gate track locking beam and pushing device thereof

The invention discloses a hydropower station gate track locking beam and a pushing device thereof.The hydropower station gate track locking beam comprises a locking beam assembly, the locking beam assembly comprises a locking beam body, a pressure bearing plate arranged at the top of the locking beam body, an elastic piece arranged in the middle of the interior of the locking beam body, and triggering pieces arranged on the two sides of the interior of the locking beam body; the moving part is arranged at the bottom of the locking beam body; and the pushing assembly comprises a connecting piece arranged at one end of the triggering piece, a mounting piece arranged at the bottom of the locking beam body, a screw rod arranged in the middle of the connecting piece, and an operating piece arranged at the end part of the screw rod. Through the arrangement of the locking beam assembly and the pushing assembly, a worker can easily push the locking beam into a designated position, the locking beam ...

Electric power test data analysis method and device and computer storage medium

The invention discloses an electric power test data analysis method and apparatus, and a computer storage medium. The method comprises the steps of obtaining target test data corresponding to target electric power equipment according to a standard test data model; judging whether the equipment health state of the target power equipment is abnormal or not according to the target test data corresponding to the target power equipment, a preset test data threshold value and historical test data; and if it is judged that the equipment health state of the target power equipment is abnormal, generating an equipment health state analysis result, and generating a fault report corresponding to the target power equipment according to the equipment health state analysis result. It can be seen that by implementing the method, convenience and normalization of electrical test data recording and analysis can be improved, and then the accuracy and reliability of electrical equipment state evaluation are ...

Sandless vacuum preloading drainage geomat

Zellulares schnurloses Übertragungssystem mit festen Endgeräten

Antiskid tire and antiskid device thereof

The invention relates to the antiskid technical field of tires and provides an antiskid tire and an antiskid device thereof. The antiskid tire device comprises an antiskid belt main body, wherein the antiskid belt main body is matched with and embedded in an annular groove formed in a tire body along the outer periphery of the tire body; the outer surface of the antiskid belt main body is provided with a plurality of antiskid teeth along the length direction of the antiskid belt main body, and the antiskid teeth extend along the width direction of the antiskid belt main body; a first connecting part is arranged on the side (close to the outer surface) of one end of the antiskid belt main body, and a second connecting part is arranged on the side (close to the inner surface) of the other end of the antiskid belt main body; the antiskid belt main body is embedded in the annular groove arranged in the belt body along the outer periphery of the antiskid belt body, and the first connecting part ...

Constant-flow bubble type automatic water level measurement device with micro power consumption

The invention aims to provide a constant-flow bubble type automatic water level measurement device with micro power consumption, which comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a data acquisition device used as core control equipment, a manual register connected through a RS 232C serial port, a constant-flow bubble type water gauge and a barometer connected through an SDI-12 interface, communication equipment connected through a RS 232C serial port, and a 12V DC power supply source of a double-core interface; and the indoor unit comprises a centralized controller with built-in application software, communication equipment connected through a RS 232C serial port, and an AC/DC power supply source, and is connected with the outdoor unit through a communication channel. The device overcomes the defect that the measurement errors of national and international constant-flow bubble type water gauges increase along with the increase of water level amplitude ...

Operation supervision method and device

The invention discloses an operation supervision method and device, and the method comprises the steps: enabling an operation plan management module to analyze an operation plan in an operation plan library, and obtaining an analysis result; the risk assessment module obtains operation information of the operation plan and formulates an operation risk level of the operation plan according to the operation information; and the operation supervision management module supervises the operation site of the operation plan based on the analysis result and the operation risk level of the operation plan to obtain a supervision result. Therefore, the operation plan can be managed through the operation plan management module, the operation plan entrance is unified, the corresponding operation risk level can be formulated according to the operation information of the operation plan, the supervision management work can be carried out according to the risk level of the operation plan, and the supervision ...

LOGIC ENCRYPTION FOR INTEGRATED CIRCUIT PROTECTION

A method for encrypting logic includes generating, by a computing system, locking logic for inclusion in a logic circuit. The locking logic is generated based at least in part on an error rate and an attack complexity. The method also includes inserting, by the computing system, a one-way function into the locking logic. The method further includes applying, by the computing system, obfuscation logic to the logic circuit, where the obfuscation logic is applied on top of the locking logic.

METHOD FOR ESTIMATING TIMING POSITION OF DATA BURST RECEIVED IN DATA STREAM

PROBLEM TO BE SOLVED: To estimate the timing position of a received data burst by deciding the average timing position of a maximum correlation value for first N-pieces of data bursts and estimating the timing positions of respective data bursts for next M-pieces of data bursts based on the average timing position of the first N-pieces of data bursts. SOLUTION: A receiver estimates the plural timing positions of a training sequence on first N-pieces of received data bursts. The training sequences are correlated with the estimated timing positions, the timing position associated with the highest correlation value is decided and the average timing position of the highest correlation value on the first N-pieces of data bursts is decided. The receiver estimates the timing positions of the respective data bursts for the next M-pieces of data bursts based on the average timing position of the first N-pieces of data bursts. COPYRIGHT: (C)2000,JPO ...

Idling-free unloading energy saving screw type air compressor

The invention discloses an air compressor, aiming at providing an idling-free unloading energy saving screw type air compressor. The air compressor comprises a host provided with a screw inside and a motor connected with the host by a coupling; the host is provided with an air inlet and is connected with a oil-gas separating pot by a oil-gas mixed pipe, the oil-gas separating pot is connected with the host by the lubricating oil pipe and through a radiator and provided with a compressed air pipe for outputting the air compressor, an air filter is arranged at the air inlet of the host by an air inlet filtering base, a fuel cut-off electromagnetic valve is arranged on the lubricating oil pipe between the radiator and the host; a minimum pressure valve is arranged at the compressed air pipe. The screw air compressor can be started directly without idling unloading and has simple structure, the production cost can be reduced by 25-30%, the energy is saved by 20 to 30%, the internal pressure ...

Electric power tower pole climbing transportation device for improving dispatching fault handling efficiency

The invention relates to the technical field of electric power tower pole construction, in particular to an electric power tower pole climbing transportation device for improving dispatching fault handling efficiency, which comprises a bearing unit comprising a bearing plate defining a storage space; and the packaging unit comprises a packaging plate, a steering connecting piece for connecting the packaging plate and the bearing plate, a first clamping piece, a second clamping piece, a tower pole body, a climbing unit, a driving unit and a labor-saving pulley assembly. And the movement of the maintenance personnel is not affected, the efficiency of the maintenance work is improved, and the falling risk of the maintenance personnel can also be reduced.

Industrial concentrated brine zero-discharge treatment process and device

Provided are an industrial concentrated brine zero-discharge treatment process and device. The process flow comprises industrial concentrated brine, an inlet water adjusting tank, a softening membrane device, a reverse osmosis device, a high-pressure re-concentration membrane device, an evaporative crystallization device, a centrifugal separator, and waste residue treatment. The device comprises the inlet water adjusting tank, a recycled water tank, a sludge collecting tank, the softening membrane device, the reverse osmosis device, the high-pressure re-concentration membrane device, the evaporative crystallization device, the centrifugal separator and a plant-and-frame filter press. The industrial concentrated brine zero discharge treatment device is characterized in that the inlet water adjusting tank, the softening membrane device, the reverse osmosis device, the high-pressure re-concentration membrane device, the evaporative crystallization device, the recycled water tank and the sludge ...

Curing agent blending transportation car

Curing agent blending transportation car, including the trucd mixer, divide mud head trailer and carry the mud pipe, the trucd mixer includes train and mixer behind trucd mixer handlebar, trucd mixer front wheel, trucd mixer bracket, trucd mixer capstan winch, mixer base, the trucd mixer, divides mud head trailer to include trailer handlebar, trailer bogie, trailer front wheel, car puller, branch mud head base, divide mud head and trailer rear wheel, the discharge gate of mixer connects through carrying the mud union coupling with the person in charge who divides mud head trailer. The utility model discloses have obvious technological effect, can carry out the mixture of silt and curing agent and carry to a synchronism, and can move on soft base that the erection joint of a plurality of slip casting mud of pipe realizes a plurality of slip castings simultaneously, thereby has realized mud solidification operation remote, the large tracts of land, the cost is reduced has improved the operating ...

FEMTO CELL BASE STATION AND METHOD

A femto cell base station and a method are disclosed. The method comprises the steps of: a) monitoring data transmission antenna weights used during wireless data transmissions over a femto cell data channel between a femto cell base station and user equipment; b) deriving broadcast channel antenna weights from the data transmission antenna weights; and c) forming the femto cell broadcast channel beam using the broadcast channel antenna weights. The femto cell broadcast channel beam is adapted to minimise interference. The femto cell broadcast channel beam may then be formed using those broadcast channel antenna weights in order to direct and restrict the size of the broadcast channel beam and reduce the likely interference caused by the femto cell to other femto cells and to a macro cell.

High-transparency weather-proof plastic material and lampshade production process

The invention discloses a high-transparency weather-proof plastic material and a lampshade production process. The material comprises polycarbonate resin, glass beads, an anti-impact agent, a toughening agent, a light stabilizer and an antioxidant. A high-transparency weather-proof automobile lampshade is obtained through mold preparation, material preparation, injection molding and later processing. With adoption of the scheme of the high-transparency weather-proof plastic material and the lampshade production process, the glass beads are added particularly and are blended in polycarbonate resin, the reflecting effect is good, the obtained automobile lampshade has high transparency, good wear resistance and good high-temperature resistance, the weather-proof property is improved, and the service life is prolonged.

Intelligent foundation detection device for building construction

The invention discloses an intelligent foundation detection device for building construction, and belongs to the field of foundation detection devices.The intelligent foundation detection device comprises a base, a supporting rod is fixedly connected to the top end of the base, a vertical rack is fixedly connected to the outer side face of the supporting rod, and the supporting rod is sleeved with two symmetrically-arranged semi-ring metal sleeves; a gear assembly matched with the vertical rack is arranged on one semi-ring metal sleeve, and an oil feeding mechanism is arranged at the top end of the gear assembly; the outer side faces of the semi-ring metal sleeves are fixedly connected with connecting bases, one ends of the connecting bases are fixedly connected with clamping plates, the connecting bases of the two semi-ring metal sleeves are attached and fixed together through bolts, the clamping plates on the connecting bases are attached together, and semi-circular grooves are formed ...

Metadata quality determination method and device

The invention discloses a metadata quality determination method and device, and the method comprises the steps: determining a metadata process document according to the change content of metadata; determining metadata quality according to the metadata process document, and generating a metadata quality document; the metadata quality document is used for indicating the metadata quality; and verifying the metadata quality according to the metadata quality document. According to the method, the corresponding metadata process document is determined through the change content of the metadata, the quality of the changed metadata is determined through the metadata process document, the corresponding metadata quality document is generated, and the metadata quality verification is performed, so that the standardization level of metadata quality determination is improved; and the efficiency and accuracy of determining the quality of the metadata are improved.

Multi-chip communication method and device based on PCIE controller and storage medium

The invention discloses a multi-chip communication method and device based on PCIE controllers and a storage medium, a first PCIE controller of a first chip is connected with a second PCIE controller of a second chip, and the method comprises the steps of obtaining first to-be-transmitted data to be transmitted to the second chip by the first chip; and transmitting the first to-be-transmitted data to a second PCIE controller by utilizing a direct memory access engine of the first PCIE controller, so as to forward the first to-be-transmitted data to a memory of a second chip through an address conversion function of the second PCIE controller, so that the second chip reads the first to-be-transmitted data. The PCIE controllers of different chips are directly connected, and the DMA engine is utilized to complete data transmission among the multiple chips, so that the DMA technology is applied to multi-chip communication, the limitation of an accelerator module is avoided, the IO throughput ...

SELECTING A TARGET CELL FOR A BLIND HANDOVER

The present invention provides methods for selecting a target cell for a blind handover. The methods may include selecting at least one target cell for a blind handover of a first mobile unit based on at least one measurement performed by the first mobile unit or at least one second mobile unit for at least one measurement-based handover. © KIPO & WIPO 2009 ...

Femto cell base station and method

A femto cell base station and a method are disclosed. The method comprises the steps of: a) monitoring data transmission antenna weights used during wireless data transmissions over a femto cell data channel between a femto cell base station and user equipment; b) deriving broadcast channel antenna weights from the data transmission antenna weights; and c) forming the femto cell broadcast channel beam using the broadcast channel antenna weights. The femto cell broadcast channel beam is adapted to minimize interference. The femto cell broadcast channel beam may then be formed using those broadcast channel antenna weights in order to direct and restrict the size of the broadcast channel beam and reduce the likely interference caused by the femto cell to other femto cells and to a macro cell.

Small-angle measurement device and measurement method thereof

The invention discloses a small-angle measurement device and a measurement method thereof. The small-angle measurement device comprises a photoelectric auto-collimator, wherein a measuring head is arranged on the front end of the photoelectric auto-collimator; the measuring head comprises an installation platform, and a first reflecting mirror and a second reflecting mirror which are vertically installed on the installation platform; the first reflecting mirror and the photoelectric auto-collimator are slantways arranged at 45 degrees; the mirror surface of the first reflecting mirror is opposite to the photoelectric auto-collimator; the mirror surface of the second reflecting mirror is opposite to the first reflecting mirror; an included angle theta between the second reflecting mirror and the optical axis of the photoelectric auto-collimator is an acute angle. With the technical scheme, the resolution ratio of small-angle measurement can be improved without changing the existing photoelectric ...

Heuristic method for dummy fill of chemical mechanical polishing process

The invention belongs to the technical field of manufacturing of integrated circuit semiconductor and provides a heuristic method for the dummy fill of a chemical mechanical polishing process. In the method, the dummy fill problem of the minimum dummy metal number is expressed as a standard linear programming problem and then a heuristic algorithm for dynamically increasing the dummy metal density in a grid is provided for solving the minimum dummy fill problem. In the method, the density value of dummy metal filled in the to-be-filled grid is dynamically determined during each optimization process according to a grid density cost function and approximation precision; meanwhile, the increment of the dummy metal density in the grid during each iteration is adjusted through an approximate constant epsilon; thus the compromise of the final result precision and the calculation speed can be realized. The method has high feasibility, extremely high-efficiency processing speed, superior calculation ...

Auxiliary assembly heavy -calibre optical element's tool equipment

The utility model discloses an auxiliary assembly heavy -calibre optical element's tool equipment, including the frame, this frame includes two bottom end rails and two entablatures of parallel arrangement, the entablature is equipped with the slide along length direction, two install between the entablature and to follow the gliding sliding seat of slide, the jack catch device is installed through elevating system and rotary mechanism in the sliding seat lower part, two be provided with component framework fixing base and component centre gripping frame fixing base between the bottom end rail symmetrically. The utility model discloses can prevent that optical element from being destroyed in assembling process to assembly efficiency is high, can satisfy the irregular income frame assembly requirements who perhaps plates the heavy -calibre optical element of chemical rete of appearance.

System and method for realizing data recording function of grouping exchanger

The present invention discloses a system and a method for realizing a data recording function of a grouping exchanger, which mainly solves a problem that terminal failure detecting and data recording functions are lack of in the existing airborne exchangers. The system comprises a terminal input module, a terminal output module, an end-port input module, an end-port output module, a control module, an exchanging module and a data recording module. A detection response frame of the terminal output module is received by the end-port input module to generate end-port state data; after an input data frame and the end-port state data sent from the end-port input module and an output data frame and forwarding table data sent from the exchanging module are respectively added into control domainsby a data recorder, the input data frame and the end-port state data sent from the end-port input module and the output data frame and the forwarding table data sent from the exchanging module are stored ...

Inertia measurement unit calibration method for low precision dual-axis rotation-dwell equipment having orientation reference

The present invention discloses an inertia measurement unit calibration method for low precision dual-axis rotation-dwell equipment having orientation reference, and belongs to the technical field of inertia. According to the calibration method, low precision dual-axis rotation-dwell equipment having orientation reference is adopted, 19 positions are obtained through calibration rotation, velocity errors and sky direction attitude errors of various positions are adopted to fit a first-order middle parameter [delta]g and a second-order middle parameter [omega]v<*>, the error parameters of various devices are obtained through a least square method according to the relationship between the middle parameter and the error parameter, in order to effectively eliminate the positioning error caused by table rotation, the error parameter calculated through the previous iterative computation and the original inertial measurement unit output data are substituted into a navigation equation, calculations ...

Power-cut plan generation method and device

The invention discloses a power-cut plan generation method and device, and the method comprises the steps: obtaining a planned power-cut window of an operation and maintenance power distribution network, the planned power-cut window being used for indicating the time period when each operation and maintenance unit executes power-cut operation and maintenance operation; power failure equivalent parameters of the operation and maintenance power distribution network are determined according to the planned power failure window, and the power failure equivalent parameters comprise the predicted power failure equivalent of the operation and maintenance power distribution network in the preset time duration; and according to the planned power-off window, the power-off equivalent parameter and a preset power-off grade table, generating a power-off plan of the operation and maintenance power distribution network, the power-off plan being used for indicating the operation and maintenance power distribution ...

AOS1 gene for regulating and controlling daytime flowering time of rice and application of AOS1 gene

The invention discloses an AOS1 gene for regulating and controlling the daytime flowering time of rice and application of the AOS1 gene, and relates to the technical field of gene engineering and molecular breeding. The nucleotide sequence of the AOS1 gene is as shown in SEQ ID NO. 1. The invention provides a JA biosynthetic pathway key gene AOS1 for controlling the flowering time of rice, the gene encodes and expresses allene oxide synthase, the allene oxide synthase catalyzes 13-hydroperoxide derivative (13-HPOT) to be converted into unstable allene oxide (12, 13-EOT), the allene oxide synthase is an intermediate product of JA synthesis, and the allene oxide synthase gene AOS1 can be used for controlling the flowering time of rice. Experiments prove that the rice material obtained through overexpression is about 0.5 h in advance of flowering. The AOS1 gene can be used for preparing rice varieties with different flowering time, is used for breeding hybrid rice, and is beneficial to improving ...

Handheld 3D scanner and use method

The handheld 3D scanner comprises a shell (1) and a front panel (2), a lens module, a power supply circuit board (31), a battery and a mainboard (10) are arranged in the shell (1), the lens module is fixedly or detachably connected with the power supply circuit board (31), the battery is in power supply connection with the lens module, the power supply circuit board (31) and the mainboard, and the power supply circuit board (31) is electrically connected with the mainboard. A touch screen (3) is further arranged at the position, located in the area where the lens module is located, of the exterior of the shell (1), the touch screen (3) is in communication connection with the power circuit board (31), various complex on-site testing environments are met, good portability is achieved, and compared with a laser scanner, the laser scanner has the great advantage in cost.

Carbon-based composite porous material and preparation method thereof

The invention relates to a carbon-based composite porous material and a preparation method thereof.The method at least comprises the following steps that S1, a salt solution of metal M is added into porous carbon to be mixed, and a mixture B is obtained; s2, under the protection of inert gas, heating the mixture B to a first temperature t1 at a first rate a1, and carrying out heat treatment to decompose the metal salt solution into a metal oxide, so as to obtain a mixture C; and S3, under the protection of inert gas, heating the mixture C to a second temperature t2 at a second rate a2, and carrying out heat treatment to obtain the metal composite porous carbon material. The carbon-based composite porous material prepared by adopting the method is simple in preparation process and high in effective specific surface area, the capacity of an energy storage device is obviously improved, and the carbon-based composite porous material can be applied to a super-capacitor electrode, a secondary ...

Data comparison processing method and device

The invention discloses a data comparison processing method and device, and the method comprises the steps: obtaining a to-be-compared first data table and a to-be-compared second data table, and enabling the second data table to be generated through the data processing operation of the first data table; determining a first target field in the first data table, and determining a second target field in the second data table; comparing the first target field with the second target field based on a preset comparison control condition to obtain a first comparison result; determining first data stored in the first target field, and determining second data stored in the second target field; comparing the first data with the second data to obtain a second comparison result; and generating a comprehensive comparison result according to the first comparison result and the second comparison result. Therefore, by implementing the method and the device, the efficiency of comparing and processing the ...

Application of rice OsHSN gene in regulation and control of rice fertility development

The invention discloses application of a rice OsHSN gene in regulation and control of rice fertility development. Through mutation of the rice OsHSN gene and inhibition of protein expression of the rice OsHSN gene, it is found that the growth vigor of an obtained mutant plant is not obviously different from that of a wild type, however, anthers of the mutant plant are curled, polarity development of the anthers is abnormal, and the rice yield is obviously reduced, which indicates that the rice OsHSN gene can regulate and control fertility development of rice; a rice male sterile line can be created by blocking or inhibiting the expression of the OsHSN gene and is used for cultivating hybrid rice and the like. The invention also provides a method for obtaining a mutant with anther polarity dysplasia by utilizing the mutant OsHSN gene, an effective way is provided for design and breeding of rice, and compared with a mutant obtained by utilizing chemical and physical mutagenesis, the mutant ...

Centrifugal Pump Connection Device for Electrical Submersible Pump Unit

The invention relates to a centrifugal pump connection device for electrical submersible pump unit; two or more centrifugal pumps are fixedly connected successively from top to bottom, the lower end of a centrifugal pump body being a connecting flange and a rabbet at the lower end of the connecting flange inserting in the upper inner bore of an adjacent centrifugal pump body, the contact surface between the connecting flange and the centrifugal pump body is a spherical surface, and the used washer of a bolt is a disc washer; the spherical surface of the connecting flange is a convex spherical surface, and the spherical surface of the upper end of the centrifugal pump body is a concave spherical surface. The device has the following benefits: it has reasonable structure, being able to improve the overall flexibility of the electrical submersible pump unit, and to increase success rate of the electrical submersible pump unit descending into horizontal well and highly-deviated well and durability ...

Gas and sand anchor device of electrical submersible pump

The invention relates to a gas and sand anchor device of an electrical submersible pump. To overcome the defect that an underground unit of the prior electrical submersible pump does not have gas, liquid and sand separating function simultaneously, a gas and sand anchor (20) is installed at the lower end of the electrical submersible pump with an air deflector (25); the upper part of a connectingtube (7) of the gas and sand anchor (20) is inserted into a shell (2) through a hole in the middle of a lower sealed disk (6); a liquid inlet groove (10) is arranged at the middle part of a connector(9); the lower end part of the connector (9) is fixedly connected with the lower end of an upper shell (8) and the upper end of a lower shell (12); the upper end part of the connector (9) is fixedly connected with the lower end of the connecting tube (7) and the upper end of an isolating tube (11); a lower connector (13) is fixedly installed at the lower end part of the lower shell (12); and a sand discharge ...

H-shaped steel

The H-shaped steel comprises a web plate and flanges which are fixedly connected to the upper surface and the lower surface of the web plate and are perpendicular to the web plate, two fixing plates are arranged at one end between the two flanges, the web plate is located between the two fixing plates, and inserting holes are formed between the fixing plates and the web plate. The other end between the two flanges is fixedly connected with an inserting plate corresponding to the inserting hole, a mounting groove is formed in the side wall, close to the fixing plate, of the inserting plate, the mounting groove is located outside the H-shaped steel, a fixing block moving in the width direction of the H-shaped steel is slidably inserted into the mounting groove, and a fixing hole corresponding to the fixing block is formed in the fixing plate; rotating assemblies for driving the fixing blocks to rotate to be staggered with the fixing holes are further arranged at the ends, connected with the ...

Operation and inspection management and control method and device for power equipment

The invention discloses a power equipment operation and maintenance management and control method and device, and the method comprises the steps: obtaining the state index of target equipment, obtaining the first maintenance data information of the target equipment and the second maintenance data information of a line where the target equipment is located according to the state index, generating a management and control coefficient of the target equipment according to the first maintenance data information of the target equipment and the second maintenance data information of the line where the target equipment is located, and performing operation maintenance analysis on the target equipment and the line where the target equipment is located according to the management and control coefficient to obtain a management and control strategy corresponding to the target equipment, the management and control strategy is used for executing a management operation associated with operation inspection ...

Non-coherent transmission method for uplink control signals using a constant amplitude zero-autocorrelation sequence

In one embodiment of the instant invention, a non-coherent transmission method for uplink control signals is provided. The transmission methodology uses a constant amplitude zero-autocorrelation (CAZAC) sequence for relatively short control signal lengths. The methodology includes creating a CAZAC sequence, truncating the CAZAC sequence into a plurality of segments; and transmitting each of the segments within a predetermined window of time.

Database transaction concurrency control method and device

The invention discloses a database transaction concurrency control method and device, and the method comprises the steps: obtaining information of target data in a database at a first moment, obtaining first target data information, executing a database transaction according to the first target data information, obtaining information of target data in the database at a second moment, obtaining second target data information, and executing the database transaction according to the second target data information; whether the first target data information is matched with the second target data information or not is judged, when it is judged that the first target data information is matched with the second target data information, the database transaction is submitted, and when it is judged that the first target data information is not matched with the second target data information, the database transaction is rolled back. It can be seen that the whole process does not lock or unlock the target ...

Zeitabschätzung für GSM-Bursts auf Grundlage zuvor ermittelter Durchschnittswerte

HOST COMPUTER AND METHOD FOR ADJUSTING DISPLAY PARAMETERS

A method for adjusting display parameters of a monitor connected to a host computer. The host computer includes a video card. If the monitor cannot display data normally, the method selects a group of display parameters C which has not been used by the monitor, and is applicable to both the video card and the monitor, and sets the parameters in the selected group of display parameters C as the preferred display parameters of the monitor. 1. A method for adjusting display parameters of a monitor connected to a host computer , the host computer comprising a video card , the method comprising:{'b': 1', '1, '(a) reading a first display parameters combination P from the video card, the first display parameters combination P being a combination of the particular parameters applicable to the video card;'}{'b': 2', '2, '(b) reading a second display parameters combination P from the monitor, the second display parameters combination P being a combination of the particular parameters applicable to the monitor;'}{'b': 3', '3', '1', '2, '(c) generating a third display parameters combination P, the third display parameters combination P being an intersection of the first display parameters combination P and the second display parameters combination P;'}(d) detecting whether the monitor is displaying data normally;{'b': 1', '1, '(e) in response to the monitor not displaying data normally, reading a display parameters group C from the monitor, the display parameters group C being a group of the current display parameters of the monitor;'}{'b': 1', '4, '(f) adding the display parameters group C to a fourth display parameters combination P;'}{'b': 2', '3', '4, '(g) selecting a group of display parameters C that falls within the third display parameters combination P but is excluded from the fourth display parameters combination P; and'}{'b': '2', '(h) setting certain parameters in the selected group of display parameters C as the preferred display parameters of the monitor, and ...

MOBILE PHONE

A mobile phone includes a fingerprint input unit, a storage unit, a switch unit, and a control unit. The fingerprint input unit is used to read and record fingerprint information of a user, and output the fingerprint information. The storage unit stores a fingerprint mode. The switch unit is connected to a power on/off terminal of the mobile phone. The control unit is used to receive the fingerprint information and compare the received fingerprint information with the stored fingerprint mode. If the received fingerprint information is not consistent with the stored fingerprint mode and the mobile phone is at a power-off state, the control unit outputs a first control signal to control switch unit to keep the mobile phone being at the power-off state. 1. A mobile phone comprising:a power on/off terminal;a fingerprint input unit to read and record fingerprint information of a user, and output the fingerprint information;a storage unit storing a fingerprint mode;a switch unit connected to the power on/off terminal; anda control unit to receive the fingerprint information and compare the received fingerprint information with the stored fingerprint mode, wherein upon a condition that the received fingerprint information is not consistent with the stored fingerprint mode and the mobile phone is at a power-off state, the control unit outputs a first control signal to control the switch unit to keep the mobile phone being at the power-off state.2. The mobile phone of claim 1 , wherein upon a condition that the received fingerprint information is not consistent with the stored fingerprint mode and the mobile phone is at a power-on state claim 1 , the control unit outputs a second control signal to the switch unit to turn off the mobile phone claim 1 , the control unit records that the mobile phone is at the power-off state.3. The mobile phone of claim 1 , wherein upon a condition that the received fingerprint information is consistent with the stored fingerprint mode and the ...

KEYBOARD WITH CIRCUIT FOR CLEARING CMOS DATA

A keyboard includes a keyboard body, a first resistor, a first capacitor, a jumper block mounted to the keyboard body, a battery, a keyboard interface, and a keyboard control circuit. The jumper block includes a grounded first pin and a second pin. The battery includes a positive terminal grounded by the first resistor and the first capacitor connected in series, and a grounded negative terminal. The keyboard interface includes a data pin, a voltage pin, and an idle pin. The idle pin is connected to a node between the first resistor and the first capacitor, and connected to the second pin of the jumper block. The keyboard control circuit is connected to the data pin to transmit data, and connected to the voltage pin to receive a voltage. 1. A keyboard comprising:a keyboard body;a first resistor;a first capacitor;a jumper block mounted to the keyboard body, the jumper block comprising a grounded first pin and a second pin, the first pin and the second pin exposing through the keyboard body;a battery comprising a positive terminal grounded by the first resistor and the first capacitor connected in series, and a grounded negative terminal;a keyboard interface comprising a data pin, a voltage pin, and an idle pin, the idle pin connected to a node between the first resistor and the first capacitor, and connected to the second pin of the jumper block; anda keyboard control circuit connected to the data pin to transmit data, and connected to the voltage pin to receive a voltage.2. The keyboard of claim 1 , wherein the first and second pins of the jumper block are mounted on an end of the keyboard body.3. The keyboard of claim 1 , further comprising a first diode and a second diode claim 1 , wherein an anode of the first diode is connected to the voltage pin of the keyboard interface claim 1 , a cathode of the first diode is connected to the first resistor opposite to the anode between the first resistor and the first capacitor claim 1 , an anode of the second diode is ...

NOTEBOOK COMPUTER

A notebook computer includes a keyboard, a display, a light source arranged on the keyboard or the display, and a light source control circuit. The light source control circuit includes first to third electronic switches. A control terminal of the first electronic switch is connected to a working voltage terminal. A first terminal of the first electronic switch is connected to a first terminal of the light source and a first terminal of the third electronic switch. A second terminal of the light source is connected to a standby voltage terminal A control terminal of the second electronic switch is connected to a sleep signal terminal A first terminal of the second electronic switch is connected to the standby voltage terminal and a control terminal of the third electronic switch. Second terminals of the first to third electronic switches are grounded. 1. A notebook computer comprising:a keyboard and a display;a light source arranged on the keyboard or the display;a working voltage terminal, wherein the working voltage terminal supplies a working voltage in response to the notebook computer being in a working state, and does not supply the working voltage in response to the notebook computer being in a sleep state;a standby voltage terminal, wherein the standby voltage terminal supplies a standby voltage in response to the notebook computer being in the working state or the sleep state;a sleep signal terminal, wherein the sleep signal terminal supplies a high voltage in response to the notebook computer being in the working state, the sleep signal terminal supplies a square wave signal in response to the notebook computer being in the sleep state; anda light source control circuit comprising first to third electronic switches;wherein a control terminal of the first electronic switch is connected to the working voltage terminal, a first terminal of the first electronic switch is connected to a first terminal of the light source and a first terminal of the third ...

Slide rail assembly

A slide rail assembly includes a first rail, a second rail slidably received in the first rail, a mounting bracket fixed to the second rail, a positioning member movably mounted to the mounting bracket, and a releasing member slidably mounted to the second rail. The first rail includes a holding portion. The positioning member engages with the holding portion to prevent the second rail from sliding into or out of the first rail. By sliding the releasing member, the releasing member drives the positioning member to disengage from the holding portion of the first rail, thereby enabling the second rail to slide into or out of the first rail.

COMPUTER DESK

A computer desk includes a desk body, a desktop, and a cover. The desktop defines a first groove and a second groove defined at a bottom of the first groove for receiving a liquid crystal display. The cover detachably covers the first groove. 1. A computer desk comprising:a desk body;a desktop defining a first groove and a second groove defined at a bottom of the first groove for receiving a liquid crystal display (LCD); anda cover detachably covering the first groove.2. The computer desk of claim 1 , wherein a thickness of the cover is substantially equal to a depth of the first groove claim 1 , and a depth of the second groove is substantially equal to a thickness of the LCD.3. The computer desk of claim 1 , wherein a rear side of a bottom of the second groove defines a third groove to receive a bottom side of the LCD claim 1 , and a through hole is defined in the third groove through which data and power cables of the LCD extend through.4. The computer desk of claim 3 , wherein two fourth grooves are defined in the rear side of the bottom of the second groove and communicate with opposite ends of the third groove claim 3 , and the fourth grooves rotatably mount opposite ends of the bottom side of the LCD.5. A computer desk assembly comprising:a desk body;a desktop defining a first groove and a second groove defined at a bottom of the first groove;a cover detachably covering the first groove; anda liquid crystal display (LCD) received in the second groove, wherein a bottom side of the LCD is rotatably mounted to a rear side of a bottom of the second groove.6. The computer desk assembly of claim 5 , wherein the thickness of the cover is substantially equal to the depth of the first groove claim 5 , and the depth of the second groove is substantially equal to the thickness of the LCD.7. The computer desk assembly of claim 5 , wherein the rear side of the bottom of the second groove defines a third groove to receive the bottom side of the LCD claim 5 , and a through ...

BIOS REFRESH DEVICE AND METHOD USING THE SAME

A BIOS refresh device includes a first socket, a second socket, and a jumper. The first socket includes a first elastic contact, a first voltage contact, and a first ground contact. The second socket includes a second elastic contact, a second voltage contact, and a second ground contact. The jumper includes a first pin, a second pin, a third pin, and a fourth pin. The first pin is electronically connected with the second elastic contact. The second pin is electronically connected with the first voltage contact or the second voltage contact. The third pin is electronically connected with the first elastic contact. The fourth pin is electronically connected with the second ground contact or the second ground contact. 1. A BIOS refresh device capable of connecting with a motherboard of a computer , comprising:a first socket comprising a first elastic contact, a first voltage contact, and a first ground contact;a second socket comprising a second elastic contact, a second voltage contact, and a second ground contact;a jumper comprising a first pin, a second pin, a third pin, and a fourth pin;wherein the first pin is electronically connected with the second elastic contact;wherein the second pin is electronically connected with the first voltage contact or the second voltage contact;wherein the third pin is electronically connected with the first elastic contact; andwherein the fourth pin is electronically connected with the first ground contact or the second ground contact.2. The BIOS refresh device of claim 1 , wherein the second pin is connected with the first voltage contact or the second voltage contact through a resistor.3. The BIOS refresh device of claim 2 , wherein the first socket is configured to receive a first BIOS chip claim 2 , and the second socket is configured to connect with a second BIOS chip mounted on the motherboard.4. The BIOS refresh device of claim 3 , wherein the first elastic contact is electronically connected with a first pin INITJ of the ...

KEYBOARD KEY OF INPUT DEVICE

A key includes a frame with a top, a fluorescent layer coated on the top, and a symbol protruding up from the fluorescent layer. 1. A key comprising:a frame comprising a top;a fluorescent layer coated on the top of the frame; anda symbol protruding up from the fluorescent layer.2. The key of claim 1 , wherein the fluorescent layer is a light color claim 1 , the symbol is a dark color.3. The key of claim 2 , wherein the fluorescent layer is white claim 2 , the symbol is black.4. A key comprising:a frame comprising a top;a symbol protruding up from the top; anda fluorescent layer coated on other parts of the top.5. The key of claim 4 , wherein the fluorescent layer is a light color claim 4 , the symbol is a dark color.6. The key of claim 5 , wherein the fluorescent layer is white claim 5 , and the symbol is black.7. A key comprising:a fluorescent top; anda non-fluorescent symbol protruding up from the top.8. The key of claim 7 , wherein the fluorescent top is a fluorescent layer.9. The key of claim 8 , wherein fluorescent layer is light-colored claim 8 , the symbol is dark-colored.10. The key of claim 9 , wherein the fluorescent layer is white claim 9 , the symbol is black.11. The key of claim 8 , wherein the non-fluorescent symbol protrudes from the fluorescent layer.12. The key of claim 8 , wherein the fluorescent layer is only formed where the non-fluorescent symbol does not protrude. 1. Technical FieldThe present disclosure relates to a key of a keyboard input device.2. Description of Related ArtKeyboards are widely used now, but the keys on the keyboards generally cannot be seen clearly in the dark, which is inconvenient.The disclosure, including the accompanying drawing, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.Referring to the FIGURE, an exemplary embodiment of a key of a ...

MOUNTING APPARATUS FOR FANS

A mounting apparatus for a fan includes an enclosure, a mounting bracket mounted to the enclosure, and a latch mounted to the enclosure. The mounting bracket includes a first end wall, and a second end wall opposite to the first end wall. The latch includes a main body resisting against a top of the fan, a clasping tab extending from a first end of the main body, and a locking tab extending from a second end of the main body. The fan module is accommodated in the mounting bracket. The clasping tab is mounted to the first end wall, and the locking tab is mounted to the second end wall. 1. A mounting apparatus for a fan with two protrusions protruding from each of two opposite sidewalls of the fan , the mounting apparatus comprising:an enclosure;a mounting bracket mounted to the enclosure, comprising a first end wall, and a second end wall opposite to the first end wall to hold the fan between the first and second end walls; anda latch comprising a main body to hold a top of the fan, a clasping tab extending from a first end of the main body, and a locking tab extending from a second end of the main body;wherein the clasping tab is mounted to the first end wall, and the locking tab is mounted to the second end wall.2. The mounting apparatus of claim 1 , wherein the latch is a band-shaped clasping member made of flexible material.3. The mounting apparatus of claim 1 , wherein the clasping tab and the locking tab each define a fixing hole claim 1 , two fasteners extend through the fixing holes and then are screwed into the first and second end walls claim 1 , correspondingly.4. The mounting apparatus of claim 3 , wherein two substantially L-shaped clamping tabs protrude out from the second end wall claim 3 , and then extend towards each other claim 3 , the main body is clamped between the clamping tabs and the second end wall.5. The mounting apparatus of claim 4 , wherein the mounting bracket comprises two opposite sidewalls substantially perpendicularly connected ...

PORTABLE ELECTRONIC DEVICE HAVING UNIVERSAL EARPHONE JACK

A portable electronic device includes an earphone jack circuit for receiving an earphone plug, a control circuit and a switch circuit. The control circuit sends audio to or receives audio from the earphone plug by the earphone jack. The switch circuit is set between the earphone jack and the control circuit including a first mode and a second mode. The control circuit identifies a type of the earphone plug, and switches the switch circuit to a corresponding mode according to the type of the earphone plug. 1. A portable electronic device , comprising:an earphone jack circuit for receiving an earphone plug;a control circuit sending audio to or receiving audio from the earphone plug by the earphone jack; anda switch circuit set between the earphone jack and the control circuit, the switch circuit including a first mode and a second mode; wherein the control circuit identifies a type of the earphone plug, and switches the switch circuit to a corresponding mode according to the type of the earphone plug.2. The portable electronic device as claimed in claim 1 , wherein the earphone jack includes a first contact claim 1 , a second contact claim 1 , a third contact and a fourth contact; the first contact claim 1 , the second contact and the third contact are connected to the control circuit claim 1 , the fourth contact is grounded claim 1 , the first contact and the second contact are connected to the control circuit by the switch circuit.3. The portable electronic device as claimed in claim 2 , wherein the control circuit includes a central processing unit (CPU) claim 2 , the CPU includes a control contact connected to the switch circuit claim 2 , a right channel contact connected to the second contact claim 2 , a left channel contact and an audio receiving contact; in the first mode claim 2 , the first contact is connected to the left channel contact claim 2 , the third contact is connected to the audio receiving contact; in the second mode claim 2 , the first contact is ...

MOUNTING APPARATUS FOR FANS

A mounting apparatus for a fan defining an engaging hole includes an enclosure, a mounting bracket mounted to the enclosure, and a latch mounted to the enclosure. The mounting bracket defines a through hole, and includes a locking tab. The fan is accommodated in the mounting bracket, with the engaging hole of the fan aligned with the through hole. The locking extends through the through hole to engage in the engaging hole, thereby mounting the fan to the mounting bracket. 1. A mounting apparatus for a fan defining an engaging hole , the mounting apparatus comprising:an enclosure;a mounting bracket mounted to the enclosure, and defining a through hole; anda latch mounted to the enclosure, comprising a locking tab extending from the latch;wherein the fan is accommodated in the mounting bracket, with the engaging hole of the fan aligned with the through hole, the locking tab is extended through the through hole, to engage in the engaging hole, thereby mounting the fan to the mounting bracket.2. The mounting apparatus of claim 1 , wherein the latch further comprises a resisting board resisting against the mounting bracket claim 1 , the locking tab extends from the resisting board.3. The mounting apparatus of claim 2 , wherein the latch further comprises a main body defining a through hole claim 2 , the resisting board extends up from a side of the main body claim 2 , a post extends up from the enclosure adjacent to the mounting bracket claim 2 , the latch is mounted on the post by a fastener extending through the through hole of the main body to engage with the post.4. The mounting apparatus of claim 3 , wherein the post defines a screw hole claim 3 , the fasteners is engaged in the screw hole.5. The mounting apparatus of claim 3 , wherein a substantially bridge-shaped elastic tab extends up from the main body claim 3 , the through hole is defined in the elastic tab claim 3 , the post defines a screw hole claim 3 , a fastener is extended through the through hole claim 3 ...

Enclosure with slide assemblies

An enclosure includes a bottom plate, and a plurality of slide assemblies fixed to the bottom plate. Each of the plurality of slide assemblies includes a fixed member fixed to the bottom plate, and a rotary member rotatably received in the fixed member. The rotary member includes a first fixed and a second fixed portions, and a wheel. The first fixed portion is fixed to the second fixed portion, the second fixed portion is connected to the fixed member, and the wheel is fixed to the first fixed portion. The rotary member is operable to be in a first position to expose the wheels for moving the enclosure, and in a second position to be received in the fixed member.

BASIC INPUT OUTPUT SYSTEM REFRESH APPARATUS

A basic input output system (BIOS) refresh apparatus includes a jumper device, which includes a first pin, a second pin connected to a power source through a resistor, a third pin, and a grounded fourth pin. A master BIOS socket includes a voltage pin connected to the power source and a signal pin connected to the first pin of the jumper device. A slave BIOS socket includes a voltage pin connected to the power source and a signal pin connected to the third pin of the jumper device. Other pins of the master BIOS socket are correspondingly connected to other pins of the slave BIOS socket. The signal pin of the master BIOS socket or the slave BIOS socket receives high level signal to make a corresponding BIOS chip mounted thereon work when the first or third pin is connected to the second pin of the jumper device. 1. A basic input output system (BIOS) refresh apparatus comprising:a resistor;a jumper device comprising a first pin, a second pin connected to a power source through the resistor, a third pin, and a grounded fourth pin;a master BIOS socket comprising a voltage pin connected to the power source, a ground pin grounded, and a signal pin connected to the first pin of the jumper device; anda slave BIOS socket comprising a voltage pin connected to the power source, a ground pin grounded, and a signal pin connected to the third pin of the jumper device, wherein other pins of the master BIOS socket are correspondingly connected to other pins of the slave BIOS socket;wherein the first and third pins of the jumper device are selectively connected to the second pin or the fourth pin of the jumper device, the signal pin of the master BIOS socket or the slave BIOS socket receives a high level signal to make a corresponding BIOS chip mounted thereon work in response to the first or third pin being connected to the second pin of the jumper device.2. The BIOS refresh apparatus as claimed in claim 1 , wherein the master BIOS socket is configured to cover on a first BIOS chip ...

Fixing apparatus for battery

A fixing apparatus includes a base and a latch. A number of fixing holes is defined in the base for receiving supporting posts of different batteries. A first end of the latch is pivotably connected to a side of the base, and a second end opposite to the first end of the latch is detachably engaged with an opposite side of the base. A resilient tab extends downwards from a middle of the latch.

MOUNTING APPARATUS FOR EXPANSION CARDS

A mounting apparatus for mounting an expansion card with a cover plate to a rear panel includes a retaining member fixed to the rear panel, and a pressing member slidably attached to the retaining member. The pressing member can be slid down to press the cover plate of the expansion card. The pressing member can be slid up to release the cover plate of the expansion card. 1. A mounting apparatus for mounting an expansion card with a cover plate to a rear panel , comprising:a retaining member fixed to the rear panel, the retaining member defining a sliding slot and comprises a positioning portion at a side of the sliding slot; anda pressing member comprising a stop portion, a pressing portion, and a sliding portion to be slidably received in the sliding slot of the retaining member;wherein, when in use, the pressing member is slid down along the sliding slot of the retaining member to make the pressing portion of the pressing member press the cover plate of the expansion card, the stop portion of the pressing member is stopped under the positioning portion of the retaining member to avoid the pressing portion of the pressing member disengaging from the cover plate of the expansion card.2. The mounting apparatus of claim 1 , wherein the rear panel defines a card slot claim 1 , a support wall is substantially perpendicularly formed from the rear panel claim 1 , above the card slot claim 1 , the cover plate of the expansion card is inserted into the card slot claim 1 , with the cover plate positioned on the support wall.3. The mounting apparatus of claim 2 , wherein the rear panel comprises a mounting plate adjacent and substantially perpendicular to the support wall claim 2 , the retaining member is fixed to the mounting plate.4. The mounting apparatus of claim 2 , wherein a raised portion protrudes on the support wall to engage with the cover plate of the expansion card.5. The mounting apparatus of claim 2 , wherein two blocks are formed on the rear wall at opposite ...

POWER MANAGEMENT CIRCUIT AND ELECTRONIC DEVICE EMPLOYING THE SAME

A power management circuit for managing power of an electronic device includes a regulator and a protection circuit. The regulator converts an input voltage into a corresponding rated voltage and includes an enable pin and an output pin. The enable pin receives a voltage signal to enable or disable the regulator, and the output pin selectively outputs the rated voltage. When the electronic device is implemented as a slave universal serial bus (USB) device and the enable pin receives a low voltage signal, the regulator is disabled, and the protection circuit receives an output voltage. When the electronic device is implemented as a USB host and the enable pin receives a high voltage signal, the regulator is enabled, and the output protection circuit outputs the rated voltage. 1. A power management circuit for an electronic device , comprising: an enable pin that receives a voltage signal to enable or disable the regulator according to the voltage signal; and', 'an output pin that selectively outputs the rated voltage; and, 'a regulator that converts an input voltage into a corresponding rated voltage, the regulator comprisinga protection circuit electrically connected to the output pin, wherein when the electronic device is implemented as a slave universal serial bus (USB) device and the enable pin receives a low voltage signal, the regulator is disabled, and the protection circuit receives an output voltage; when the electronic device is implemented as a USB host and the enable pin receives a high voltage signal, the regulator is enabled, and the output protection circuit outputs the rated voltage.2. The power management circuit as claimed in claim 1 , wherein the regulator is a direct current (DC)/DC integrated circuit and is capable of converting a voltage into the corresponding rated voltage and maintaining a constant voltage level.3. The power management circuit as claimed in claim 1 , wherein the regulator further comprises a power pin and two ground pins claim ...

ELECTRONIC DEVICE

An electronic device includes a shell, and a wire holder. The wire holder includes a plate mounted to an outer side of the shell, and a number of arc-shaped latches extending out from the plate, to hold cables of peripheral connectors. 1. An electronic device , comprising:a shell; anda wire holder comprising a plate mounted to an outer side of the shell, and a plurality of latches extending out from the plate to hold wires.2. The electronic device of claim 1 , wherein the plate is elongated claim 1 , and the latches are arranged lengthwise on the plate.3. The electronic device of claim 2 , wherein each of the latches comprises a supporting portion substantially perpendicularly extending from the plate claim 2 , and a resilient arc-shaped latching portion extending towards a first end of the plate from a distal end of the supporting portion.4. The electronic device of claim 3 , wherein a narrow slot is bound by a distal end of each latching portion and an adjacent latch near the first end of the plate.5. The electronic device of claim 3 , wherein a stop plate substantially perpendicularly extends from the plate claim 3 , the stop plate aligns with the distal end of the latching portion of one of the latches closest to the first end of the plate.6. The electronic device of claim 5 , wherein a narrow slot is bound by the stop plate and the distal end of the latching portion of the latch closest to the first end of the plate.7. The electronic device of claim 1 , wherein the shell comprises a rear wall with a plurality of connector interfaces claim 1 , the wire holder is mounted to the rear wall.8. The electronic device of claim 7 , wherein two pairs of hooking slots are defined in the rear wall claim 7 , two pairs of hooks extend from the plate of the wire holder opposite to the latches claim 7 , to engage in the corresponding hooking slots.9. The electronic device of claim 8 , wherein a fixing hole is defined in the rear wall claim 8 , a through hole is defined in the ...

Charging circuit and charging method thereof

A charging circuit includes a main control microchip, a charging integrated circuit, and a current control circuit. The main control microchip includes a power-on pin connected to a charging device. The charging integrated circuit comprises a power input pin and a current limit pin, wherein the power input pin is connected to the charging device, and the charging integrated circuit is capable of limiting current. The current control circuit comprises a transistor, a first current limiting resistor and a second current limiting resistor, a base of the transistor is connected to the main control microchip, the first current limiting resistor is connected between the current limit pin and ground, and the second current limiting resistor is connected between the current limit pin and a collector of the transistor, the main control microchip is operable to output control signals to enable or disable the transistor.

Rj-45 connector assembly and assisting apparatus for unplugging rj-45 connector

A Registered Jack-45 (RJ-45) connector assembly includes an RJ-45 connector, and an assisting apparatus for unplugging the RJ-45 connector. The RJ-45 connector includes a slanted resilient latch. The assisting apparatus includes a latching portion and a pressable portion. A receiving slot is defined in the front end of the latching portion, to engage with the resilient latch of the RJ-45 connector. When the pressable portion is pressed, the assisting apparatus drives the resilient latch of the RJ-45 connector to deform and disengage from a connector of an electronic device.

SOLAR ENERGY POWER SUPPLY FOR AN AUTOMOBILE AIR CONDITIONER

A solar power supply for an automobile air conditioner includes a switch unit, a solar energy unit, and a control unit. The switch unit outputs a switch signal. The solar energy unit includes a solar panel, a solar charging circuit, a DC (direct current) voltage transformation circuit, and a battery. The control unit receives the switch signal, enables the solar charging circuit and the DC voltage transformation circuit in response to the switch signal to charge the battery and transform the voltage received from the battery to a stable voltage, respectively, and provides the stable voltage to an automobile air conditioner. 1. A solar energy power supply for an automobile air conditioner comprising:a switch unit outputting a switch signal;a solar energy unit including a solar panel, a solar charging circuit, a DC voltage transformation circuit, and a battery; anda control unit receiving the switch signal, wherein the control unit enables the solar charging circuit and the DC voltage transformation circuit in response to the switch signal to charge the battery and transform the voltage received from the battery to a stable voltage, respectively, and provides the stable voltage to the automobile air conditioner.2. The solar energy power supply of claim 1 , further comprising a switch unit claim 1 , wherein when the automobile is started or the solar energy unit reaches a low power level claim 1 , the switch unit enables the automobile power in response to a control signal received from the control unit to provide power to the automobile air conditioner.3. The solar energy power supply of claim 2 , wherein the switch unit includes a relay claim 2 , an electric switch claim 2 , a first resistor claim 2 , and a first diode claim 2 , the relay includes a coil claim 2 , a normally closed switch claim 2 , and a normally open switch; a first terminal of the electric switch is connected to the control circuit through the first resistor claim 2 , a second terminal of the ...

METHOD OF PREPARING DOUBLE-LAYER ANTIMICROBIAL COATING

A method of a preparing double-layer antimicrobial coating comprises: placing a plastic substrate into a PVD vacuum equipment for a vacuum process; rinsing and activating the substrate when the vacuum level reaches 10; coating a metal film onto the activated substrate by the vacuum process; spraying an antimicrobial intermediate coating onto the metal film; and then coating an antimicrobial metal film by PVD to obtain a double-layer antimicrobial layer. The coating has two antimicrobial layers, and includes bores because the density of the coated film layer produced by PVD is low, so that the antimicrobial agent of the antimicrobial intermediate coating can pass through the bores and move to the surface of the coating and the surface of the antimicrobial coating, so as to kill the bacteria or suppress their grown. The method is very suitable for the sanitary, electronics, electrical appliances and the automobile industry. 1. A method of preparing a double-layer antimicrobial coating , comprising the steps of:{'sup': '−2', '(1) placing a plastic substrate in a physical vapor deposition (PVD) vacuum equipment to carry out a vacuum process, and then rinsing and activating the substrate when a vacuum level reaches 10to obtain an activated substrate;'}(2) coating a metal film on a surface of the activated substrate by vacuum coating;(3) spraying the substrate coated with the metal film with an antimicrobial intermediate coating; and(4) coating the sample having the sprayed antimicrobial intermediate coating with an antimicrobial metal film by PVD to obtain a double-layer antimicrobial layer.2. The method of preparing a double-layer antimicrobial coating as recited in claim 1 , wherein the plastic substrate as described in the step (1) is one selected from the group of thermoplastic and thermosetting plastic claim 1 , and the thermoplastic is one selected from the group of ABS claim 1 , PC/ABS claim 1 , HIPS claim 1 , PC claim 1 , PPO claim 1 , PP claim 1 , PERT claim 1 , ...

SERVER RACK HAVING PAYLOAD WEIGHING FUNCTION

A server rack includes a main body, an electronic scale, and an alarm. The main body is used for receiving a number of servers. The electronic scale includes a pressure sensor and a microcontroller. The main body presses on the pressure sensor so that the pressure sensor can measure the pressure from the main body to obtain a pressure signal. The microcontroller analyzes the pressure signal to calculating the total weight of the main body and the servers. The alarm stores a predetermined weight threshold, which is the total weight of the main body and the maximum servers that the main body can bear. The alarm also compares the measured total weight with the predetermined weight threshold. When the measured total weight is larger than the predetermined weight threshold, the alarm alarms. 1. A server rack , comprising:a main body configured for receiving a plurality of blade servers therein; a pressure sensor supporting the main body and configured for measuring pressure from the main body to obtain a pressure signal, and', 'a microcontroller configured for analyzing the pressure signal to calculate total weight of the main body and the blade servers,, 'an electronic scale comprisingan alarm storing a predetermined weight threshold, the predetermined weight threshold being total weight of the main body and a maximum number of blade servers that the main body can bear, the alarm signaling an alarm when the measured total weight is larger than the predetermined weight threshold.2. The server rack in claim 1 , further comprising an amplifying circuit electrically connected to the pressure sensor and the microcontroller claim 1 , and configured for amplifying the pressure signal of the pressure sensor claim 1 , and sending the amplified pressure signal to the microcontroller.3. The server rack in claim 2 , wherein the amplifying circuit comprises a first operational amplifier claim 2 , a second operational amplifier claim 2 , and a third operational amplifier; the first ...

COMPUTER MOUSE

A computer mouse includes a body, a control module, a power supply, and a lighting module. The control module and the power supply are mounted in the body. The power supply is connected to the control module and the lighting module. The light module includes a first light emitter, a second light emitter, and a lighting control unit. The first light emitter emits warm colored light. The second light emitter emits very bright light. The lighting control unit can be used to selectively turn on the first light emitter or the second light emitter. 1. A computer mouse comprising:a body;a control module mounted in the body;a power supply mounted in the body, wherein the power supply is connected to the control module for supplying power to the control module; and a lighting unit comprising a first light emitter and a second light emitter, wherein the first light emitter emits a warm colored light, the second light emitter emits light with high brightness; and', 'a lighting control unit to selectively turn on the first light emitter or the second light emitter., 'a lighting module connected to the power supply, wherein the lighting module comprises2. The mouse of claim 1 , wherein the lighting module further comprises an over-current protection unit claim 1 , the over-current protection unit comprises first to fourth resistors claim 1 , the first resistor is connected between the power supply and the first light emitter claim 1 , the second resistor is connected between the power supply and the second light emitter claim 1 , the third and fourth resistors are connected between the power supply and the lighting control unit.3. The mouse of claim 2 , wherein the first light emitter is a first light-emitting diode claim 2 , the second light emitter is a second light-emitting diode.4. The mouse of claim 3 , wherein the lighting control unit comprises a double throw switch claim 3 , the double throw switch comprises a pole claim 3 , a first throw claim 3 , and a second throw ...

LED PROBE

A probe includes a main body and a sensor circuit board. The main body includes a through hole capable of accommodating an LED under test and an accommodation space capable of accommodating the sensor circuit board. The main body is made of opaque material. The sensor circuit board includes a light sensor, a body and a connector. The light sensor is opposite to the through hole. The probe separates the light sensor and the LED under test from ambient light, thereby enhancing the precision of test results. 1. A light-emitting diode (LED) probe , comprising:a main body including a through hole capable of accommodating an LED under test and an accommodation space, wherein the main body is made of opaque material; anda sensor circuit board including a light sensor, a body and a connector, wherein the light sensor is opposite to the through hole of the main body and the sensor circuit board is accommodated in the accommodating space.2. The LED probe of claim 1 , wherein the main body further includes a light guide unit disposed in the through hole.3. The LED probe of claim 1 , wherein the light guide unit is a light pipe.4. The LED probe of claim 1 , wherein the light guide unit is an optical fiber.5. The LED probe of claim 1 , wherein the main body has a recess defined adjacent to the accommodation space for accommodating at least one of the light sensor and the connector of the sensor circuit board.6. The LED probe of claim 1 , wherein the main body has a recess defined adjacent to the accommodation space for enclosing the light sensor of the sensor circuit board between the main body and the sensor circuit board.7. The LED probe of claim 1 , wherein further comprises a fixing unit including a body and two hooks claim 1 , a recess is defined on a surface of two opposite ends of the body claim 1 , the shanks of the two hooks perpendicularly extend from two opposite edges of a surface of the body claim 1 , respectively claim 1 , while each of the hooking portion of the ...

POWER SUPPLY SYSTEM WITH ENERGY-SAVING FUNCTION

A power supply system includes a power supply, a switch control circuit, a voltage rectifying circuit, and a trigger switch connected to the switch control circuit. The switch control circuit is connected between an alternating current (AC) power source and the power supply. The voltage rectifying circuit is connected between the AC power source and the switch control circuit to rectify an AC voltage into a direct current (DC) voltage to power the switch control circuit. When the computer system is powered off, the power supply fails to output a system voltage, and the trigger switch fails to be triggered, the switch control circuit disconnects the power supply from the AC power source. When the computer system is powered off, the power supply fails to output a system voltage, and the trigger switch is triggered, the switch control circuit connects the power supply to the AC power source. 1. A power supply system to save energy for a computer system , the power supply system comprising:a power supply comprising an input terminal, and a system voltage output terminal; and a switch control circuit connected between the AC power source and the input terminal of the power supply, and connected to the system voltage output terminal of the power supply;', 'a voltage rectifying circuit connected between the AC power source and the switch control circuit to rectify an AC voltage into a direct current (DC) voltage to power the switch control circuit; and', 'a trigger switch connected to the switch control circuit;, 'an energy-saving circuit connected between the input terminal of the power supply and an alternating current (AC) power source, the energy-saving circuit comprisingwherein when the computer system is powered off, the system voltage terminal of the power supply fails to output a system voltage, and the trigger switch fails to be triggered, the switch control circuit disconnects the input terminal of the power supply from the AC power source, wherein when the ...

Power-saving reminder circuit for computer

A power saving circuit for a computer. When the computer is powered on, an LED is lit. When the computer if off but power is still being supplied from the commercial power source to the power supply of the computer, the LED blinks. A counter chip determines the time to start blinking or the frequency of blinking.

COMPUTER DESK ASSEMBLY

A computer desk assembly includes a desk and a display. The desk defines a receiving groove in a top thereof. The desk includes two sliding plates movably engaging in the receiving groove. The display is in the receiving groove of the desk and pivotably connected to the desk. When the computer desk assembly is in a first state, the sliding plates are disposed above the display. When the computer desk assembly is in a second state, the sliding plates slide laterally to expose the display, whereby the display is rotated up relative to the desk for use. 1. A computer desk assembly , comprising:a desk defining a receiving groove in a top thereof, the desk comprising two sliding plates movably engaging in the receiving groove; anda display in the receiving groove of the desk and pivotably connecting the desk;wherein when the computer desk assembly is in a first state, the sliding plates are disposed above the display; and when the computer desk assembly is in a second state, the sliding plates slide laterally to expose the display, thereby the display being rotated up relative to the desk for use.2. The computer desk assembly of claim 1 , wherein the desk has a bottom wall and four sidewalls around the bottom wall in the receiving groove claim 1 , two opposite sidewalls each defining a guiding recess to receive opposite edges of the sliding plates.3. The computer desk assembly of claim 2 , wherein each of the sliding plates has two extending portions extending from the opposite edges thereof and received in the guiding recesses of the desk.4. The computer desk assembly of claim 1 , wherein the desk further comprises two movable members and two elastic member each connecting the corresponding movable member with the desk claim 1 , the movable members having top surface coplanar with the top surface of the desk in the first state claim 1 , the movable members each being pressed by the corresponding sliding member in the second state.5. The computer desk assembly of claim 4 ...

Energy-saving reminder circuit for computer

A circuit where a rotary push switch module with first and second switches are closed and first and second terminals of a NAND gate receive high level signals. An output terminal of the NAND gate outputs a low level signal. A light emitting diode (LED) is not lit. A voltage output terminal outputs a standby voltage. When the first switch is opened, and the second switch is closed, the first and the second input terminals of the NAND gate respectively receive a high level signal and a low level signal. The output terminal of the NAND gate outputs a high level signal. The LED is lit. The voltage output terminal does not output the standby voltage.

KEYBOARD AND ELECTRONIC DEVICE USING SAME

A keyboard for an electronic device includes a main body, a test indicator positioned on an outside surface of the main body, and an interface electrically connected to both the main body and the test indicator. Both the main body and the test indicator are electrically connected to a main board of an electronic device through the interface. The electronic device can be operated using the keyboard, and the test indicator indicates the working status of the electronic device. 1. A keyboard for an electronic device , comprising:a main body;a test indicator positioned on an outside surface of the main body; andan interface electrically connected to both the main body and the test indicator;wherein both the main body and the test indicator are electrically connected to a main board of the electronic device through the interface, such that the electronic device can be operated using the main body, and the test indicator indicates working statuses of the electronic device.2. The keyboard as claimed in claim 1 , wherein the interface is a Personal System 2 (PS/2) interface and includes a power supply pin claim 1 , a data pin claim 1 , a clock pin claim 1 , a ground pin claim 1 , a first idle pin claim 1 , and a second idle pin; the main body electrically connected to the main board through the power supply pin claim 1 , the data pin claim 1 , the clock pin claim 1 , and the ground pin claim 1 , and the test indicator electrically connected to the main board through the first idle pin and the second idle pin.3. The keyboard as claimed in claim 2 , wherein the test indicator is a light emitting diode (LED) claim 2 , and an anode and a cathode of the test indicator are respectively electrically connected to the main board through the first idle pin and the second idle pin.4. The keyboard as claimed in claim 3 , wherein when a power supply of the electronic device works normally claim 3 , the power supply provides a voltage to the first idle pin through the main board claim 3 ...

FLASH DRIVE

A flash drive includes a main body and a casing pivotably installed to a first end of the main body. A universal serial bus (USB) connector extends from a second end of the main body. The casing includes two plates and an end piece perpendicularly connected between ends of the plates. The casing is pivoted toward the USB connector to enclose the USB connector. 1. A flash drive , comprising:a main body;a universal serial bus (USB) connector extending from a first end of the main body; anda casing comprising two plates and an end piece perpendicularly connected between first ends of the plates, wherein second ends of the plates are pivotably installed to a second end of the main body, the plates are operable to pivot toward the USB connector to enclose the USB connector.2. The flash drive of claim 1 , wherein two fixing holes are defined in each of top and bottom surfaces of the main body claim 1 , a protrusion extends from an inner surface of the second end of each plate for engaging in a corresponding fixing hole of the main body.3. The flash drive of claim 2 , wherein a blocking piece protrudes from the inner surface of each plate claim 2 , adjacent to the first end claim 2 , the USB connector is sandwiched between the blocking pieces of the plates.4. The flash drive of claim 3 , wherein a side piece perpendicularly connected between corresponding sides of the plates claim 3 , adjacent to the first end.5. A universal serial bus (USB) flash drive claim 3 , comprising:a main body;a USB connector extending from a first end of the main body; andtwo casings each comprising two plates and an end piece perpendicularly connected between first ends of the plates, wherein second ends of the plates sandwich a second end of the main body and are pivotably installed to the second end of the main body, the casings are operable to pivot toward each other to enclose the main body and the USB connector.6. The USB flash drive of claim 5 , wherein two fixing holes are defined in each ...

Fixing device for expansion card

A fixing device includes a frame, a positioning member, and a fixing member. A first side end of a expansion card is fixed to a first side of the frame. The positioning member is mounted to a second side of the frame opposite to the first side and capable of sliding toward the first side of the frame. A number of cutouts are longitudinally defined in the second side of the frame. A receiving space is defined in a side of the positioning member for fixing a second end of the expansion card. The fixing member is mounted to the positioning member and selectively fixed to a corresponding cutout of the frame.

Electronic device and method for switching to voice mode

In a method of switching to a voice mode, an electronic device controls a speaker of the electronic device to play a first audio recording when a mode button of the electronic device is pressed a first time. The electronic device dials a telephone number consisted of received numbers when the mode button is pressed a second time and controls to the speaker to play a second audio recording corresponding to the telephone number.

MOTHERBOARD FIXING DEVICE AND COMPUTER HAVING SAME

An exemplary motherboard fixing device is for fixing a motherboard onto a case plate inside a computer case. The motherboard fixing device is fixable on the case plate, and includes a first fixing strip and a second fixing strip. The first fixing strip includes a first, second, and third flat plates. The second flat plate is between the first and third flat plates. The first and second flat plates cooperatively define a slide groove for receiving an edge of the motherboard. The second fixing strip includes a bottom plate and a lateral plate. The third flat plate and the bottom plate include first latch hooks. The first latch hooks is engagable in corresponding through holes of the case plate, such that the first and second fixing strips are fixed on the case plate. The lateral plate includes second latch hooks for being latchable on an opposite edge of the motherboard. 1. A motherboard fixing device for fixing a motherboard in a computer case , the motherboard comprising a first side edge , and a second side edge opposite to the first side edge , the computer case comprising a case plate defining a plurality of through holes , the through holes being arranged in two rows , the motherboard fixing device comprising:a first fixing strip fixable on the case plate, the first fixing strip comprising a first flat plate, a second flat plate, and a third flat plate, the first flat plate, the second flat plate, and the third flat plate being parallel with and spaced from each other, the second flat plate being between the first flat plate and the third flat plate, the first flat plate and the second flat plate cooperatively defining a slide groove therebetween, and the third flat plate comprising a plurality of first latch hooks at a bottom thereof; anda second fixing strip fixable on the case plate, the second fixing strip comprising a bottom plate, a lateral plate substantially perpendicular to the bottom plate, and a plurality of second latch hooks extending up from the ...

SERVER HOLDER AND SERVER SYSTEM INCLUDING SAME

A server system includes a number of servers and a server holder. Each server includes two opposite sidewalls with each having a sliding rail formed thereon. The server holder includes two opposite lateral plates and a number of supporting structures. Each lateral plate defines a plurality of rows of receiving holes. Each supporting structure is received in one receiving hole, and includes a supporting block and a torsion spring positioned on the supporting bock. The supporting block is pivotably connected to one of the lateral plates, defines a sliding slot, and includes a resisting surface facing towards interior of the server holder. The sliding rail is slidable along the sliding slot. The torsion spring is configured for providing an elastic force to push the supporting block to keep the resisting surface resisting against one sidewall. 1. A server holder for receiving at least one server , the server comprising two opposite sidewalls , each sidewall having a sliding rail , the server holder comprising:two opposite lateral plates, each lateral plate defining a plurality of rows of receiving holes; and a supporting block pivotably connected to a corresponding one of the lateral plates, the supporting block defining a sliding slot, and comprising a resisting surface facing towards interior of the server holder, the sliding rail on each sidewall being configured to slide along the sliding slot; and', 'a torsion spring positioned on the supporting block to provide an elastic force to push the supporting block to keep the resisting surface resisting against a corresponding sidewall., 'a plurality of supporting structures, each supporting structure being received in one receiving hole, each supporting structure comprising2. The server holder as claimed in claim 1 , wherein the server holder comprises a top plate claim 1 , and the sliding slot faces towards the top plate.3. The server holder as claimed in claim 2 , wherein the two opposite lateral plates are parallel ...

Charging circuit with universal serial bus port

A charging circuit includes a switch, a standby power supply, a first power supply, a second power supply, a universal serial bus (USB) port, and a power supply switching module with a first to a fourth terminals. According to the power states of a computer, the power supply switching module allows either a first power supply or a second standby power supply to provide a charging voltage for the USB port through controlling the switch.

LOAD-TESTING CIRCUIT FOR USB PORTS

A power supply circuit is configured for simulating the maximum standard load currents for different kinds of USB ports, and each of the USB ports includes a power terminal; the load-testing circuit includes a voltage regulating circuit, a voltage dividing circuit, a first operational amplifier, a first transistor, and a current limiting resistor. The voltage regulating circuit is configured for supplying a reference voltage to the voltage dividing circuit. The reference voltage is divided by sub-circuits of the voltage dividing circuit. When the sub-circuit connected to the voltage regulating circuit and the first operational amplifier is changed, a current flows from the first transistor and the current limiting resistor is changed. 1. A load-testing circuit configured for simulating maximum standard load currents of different kinds of USB ports , each of the USB ports comprising a power terminal; the load-testing circuit comprising:a voltage regulating circuit connected to the power terminal, and configured for supplying a reference voltage;a voltage dividing circuit receiving the reference voltage from the voltage regulating circuit, and comprising a plurality of sub-circuits, each of the sub-circuits comprising a resistor having a different resistance;a first operational amplifier comprising a first positive input terminal connected to the voltage dividing circuit, a first negative input terminal is grounded via a current limiting resistor, and a first output terminal; anda first transistor comprising a first drain connected to the first negative input terminal, a first source connected to the power terminal, and a first gate connected to the first output terminal.2. The load-testing circuit in claim 1 , wherein the voltage regulating circuit comprises a three-terminal regulator and a regulating resistor; the three-terminal regulator comprises an anode being grounded claim 1 , a cathode connected to the power terminal via the regulating resistor claim 1 , and a ...

POWER SUPPLY CIRCUIT WITH PROTECTION CIRCUIT

A power supply circuit includes a pulse width modulation (PWM) controller, a plurality of phase circuits connected to the PWM controller, and a protection circuit connected to the PWM controller and each of the phase circuits. The PWM controller controls all of the phase circuits alternately outputting power supply voltages according to a predetermined sequence, and the protection circuit operates to detect whether the phase circuits work normally. When any one of the phase circuits does not work normally, the protection circuit turns off the PWM controller and all of the phase circuits. 1. A power supply circuit , comprising:a pulse width modulation (PWM) controller;a plurality of phase circuits connected to the PWM controller; anda protection circuit connected to the PWM controller and each of the phase circuits;wherein the PWM controller controls all of the phase circuits to alternately output power supply voltages according to a predetermined sequence, and the protection circuit operates to detect whether the phase circuits work normally, and in response to any one of the phase circuits not working normally, the protection circuit turns off the PWM controller and all of the phase circuits.2. The power supply circuit as claimed in claim 1 , wherein each of the phase circuit includes a drive controller claim 1 , a first metal-oxide-semiconductor field-effect transistor (MOSFET) claim 1 , a second MOSFET claim 1 , an inductor claim 1 , a first capacitor claim 1 , and an input end; the drive controller connected to gates of both the first MOSFET and the second MOSFET claim 1 , a source of the first MOSFET grounded claim 1 , a drain of the first MOSFET connected to a source of the second MOSFET claim 1 , a drain of the second MOSFET connected to the voltage input end claim 1 , the inductor connected between the source of the second MOSFET and the capacitor claim 1 , the capacitor connected between the inductor and ground; and in response to the voltage input end ...

FAST-DISCHARGING CIRCUIT

A fast-discharge circuit includes at least one power supply group, a switch circuit, and a power connector. Each power supply group includes a power supply unit, stabilizing capacitances, a diode, and a resistance. The power supply unit includes a positive output and a negative output. Anodes of the stabilizing capacitances and the diode are connected to the positive output of the power supply unit. Cathodes of the stabilizing capacitances are connected to the negative output. A cathode of the diode is also connected to the negative output through the resistance. The switch circuit includes a NMOS transistor. A drain of the NMOS transistor is electrically connected to the negative outputs of each power supply; a source of the NMOS transistor is grounded. The power connector includes a PS-ON pin electrically connected to a gate of the NMOS transistor. 1. A fast-discharging circuit , comprising:at least one power supply group, each power supply group comprising a power supply unit, a plurality of stabilizing capacitances, a diode, and a resistance, the power supply unit comprising a positive output and a negative output, anodes of the stabilizing capacitances and the diode being respectively connected to the positive output of the power supply unit, cathodes of the stabilizing capacitances being respectively connected to the negative output of the power supply unit, a cathode of the diode being connected to the negative output of the power supply unit through the resistance;a switch circuit comprising a NMOS transistor, a drain of the NMOS transistor being electrically connected to the negative output of each power supply unit, a source of the NMOS transistor being grounded; anda power connector comprising a PS-ON pin electrically connected to a gate of the NMOS transistor;wherein when the discharging circuit works in normal operation, the PS-ON pin of the power connector outputs a low level voltage, the NMOS transistor shuts off, during the process of the discharging ...

ALARM CIRCUIT

An alarm circuit includes a fan controller with a rotation speed control pin and a rotation speed detection pin, a first rectifying circuit connected to the rotation speed control pin, a switch circuit connected to the first rectifying circuit, a first indication circuit for indicating whether the fan fails to operate based on a switch signal from the switch circuit. The alarm circuit further includes a second rectifying circuit connected to the rotation speed detection pin, a comparison circuit for outputting a comparison signal after comparing a direct current signal from the second rectifying circuit with a first reference voltage and a second reference voltage, and an indication circuit for indicating whether the fan fails to operate based on the comparison signal. 1. An alarm circuit for a fan , the alarm circuit comprising:a fan controller connected to the fan to control the fan to operate, the fan controller comprising a rotation speed control pin for outputting a control signal, and a rotation speed detection pin for outputting a detection signal;a first rectifying circuit for converting the control signal to a first direct current (DC) signal;a switch circuit for outputting a switch signal based on the first DC signal;a first indication circuit for indicating whether the fan fails to operate based on the switch signal;a second rectifying circuit for converting the detection signal to a second DC signal;a comparison circuit for outputting a comparison signal after comparing the second DC signal with a first reference voltage and a second reference voltage; andan indication circuit for indicating whether the fan fails to operate based on the comparison signal.2. The alarm circuit of claim 1 , wherein the first rectifying circuit comprises a first resistor claim 1 , a first diode claim 1 , and a first capacitor claim 1 , a first terminal of the first resistor is connected to the rotation speed control pin claim 1 , a second terminal of the first resistor is ...

Connector assembly

A connector assembly includes a first connector and a second connector. The first connector includes a main body, and a latching member extending out from the main body. The latching member includes a resilient extending portion extending from an outer surface of the main body, and a latching protrusion extending out from the extending portion. The second connector to be connected to the first connector, and includes a base, and a connecting member extending out from an outer surface of the base. The connecting member defining sliding groove and a receiving portion communicating with the sliding groove for latching the latching protrusion. Wherein when the first and second connectors are being connected, the latching member slides through the sliding groove, such that the latching protrusion is latched in the receiving portion.

INDICATION CIRCUIT FOR INDICATING RUNNING STATUS OF ELECTRONIC DEVICES

An indication circuit for an electronic device includes a control circuit, at least one LED, and at least one buffer register electronically connected between the control circuit and the at least one LED. The control circuit outputs control signals according to a running status of the electronic device, the at least one buffer register receives the control signals, and outputs voltage signals to turn on/off the at least one LED according to the control signals. 1. An indication circuit for an electronic device , the indication circuit comprising:a control circuit;at least one light-emitting diode (LED); andat least one buffer register electronically connected between the control circuit and the at least one LED;wherein the control circuit outputs control signals according to a running status of the electronic device, the at least one buffer register receives the control signals, and outputs voltage signals to turn on/off the at least one LED according to the control signals.2. The indication circuit as claimed in claim 1 , further comprising a switch circuit claim 1 , wherein the switch circuit includes a metallic oxide semiconductor field effect transistor (MOSFET) and a resistor claim 1 , the MOSFET includes a gate claim 1 , a source claim 1 , and a drain claim 1 , the gate is electronically connected to the control circuit claim 1 , the source is connected to ground claim 1 , and the drain is electronically connected to a power source via the resistor.3. The indication circuit as claimed in claim 2 , wherein the control circuit includes a power data pin electronically connected to the gate of the MOSFET claim 2 , the power data pin outputs a high voltage signal or a low voltage signal for turning on/off the MOSFET.4. The indication circuit as claimed in claim 3 , wherein if a power supply of the electronic device is normal claim 3 , the power data pin outputs a high voltage signal claim 3 , if the power supply of the electronic device is abnormal claim 3 , the ...

Expansion card

An expansion card has at least one connector electrically coupled with at least one expansion slot of a server, and includes a shell defining at least one through slot, a main body, and a transmission element received in the shell. The transmission element includes a locating element, a connecting pole, and a fixing shaft. The connecting pole includes a head portion and a tail portion. The head portion defines a notch sleeving on the locating element. The tail portion extends outwards from the shell and defines a first hole. The fixing shaft is fixed on the shell and extends through the first hole. When the tail portion is pushed, the connecting pole rotates around the fixing shaft, the head portion drives the at least one connector to extends outwards or inwards from the at least one through slot, to electrically connected or disconnected to the at least one expansion slot.

SERVER CONTAINER WITH PAYLOAD DETECTING FUNCTION

A server container includes a main body, at least one support plate, at least one angle detecting module, and an alarm module. The main body includes two opposite sidewalls. Two opposite edges of each support plate is interconnected the two sidewalls. Each angle detecting module includes an angle sensor and a controlling module. The angle sensor is correspondingly positioned on one support plate and for detecting a bending angle of the support plate and generating an angle signal corresponding to the bending angle. The controlling module is configured for comparing the voltage of the angle signal with a reference voltage which corresponds to a predetermined degree and generating a control signal upon a condition that the voltage of the angle signal is greater than the reference voltage. The alarm module is configured for generating an alarm upon a condition of receiving the control signal. 1. A server container , comprising:a main body comprising two opposite sidewalls;at least one support plate, two opposite edges of each support plate being attached to the two sidewalls; an angle sensor correspondingly installed to one support plate and configured for detecting a bending angle of the support plate and generating an angle signal corresponding to the bending angle; and', 'a controlling module configured for comparing the voltage of the angle signal with a reference voltage which corresponds to a predetermined degree and generating a control signal upon a condition that the voltage of the angle signal is greater than the reference voltage; and, 'at least one angle detecting module, each angle detecting module comprisingan alarm module configured for generating an alarm upon a condition of receiving the control signal.2. The server container of claim 1 , wherein each angle detecting module further comprises a signal amplifying module interconnected the angle sensor and the controlling module claim 1 , the signal amplifying module is configured for amplifying the angle ...

COMPUTER MOUSE HAVING ILLUMINATING FUNCTION

A mouse includes a casing, a light, a switch, and a supporting device. The casing includes a base plate and a top cover covering the base plate. The top cover defines a receiving hole. The switch is electrically connected to the light and used to turn the light on and off. The supporting device is movably accommodated in the receiving hole and supports the light. The supporting device is capable of moving out of the receiving hole. 1. A mouse comprising: a base plate; and', 'a top cover covering the base plate and defining a receiving hole;, 'a casing, comprisinga light;a switch electrically connected to the light and positioned on the top cover for turn the light on and off; anda supporting device movably accommodated in the receiving hole and supporting the light, the supporting device capable of being moved out of the receiving hole.2. The mouse of claim 1 , wherein the supporting device comprises an extending portion claim 1 , the extending portion comprises a first pipe and a second pipe partially received in the first pipe and capable of moving along the first pipe claim 1 , the light is positioned on an end of the second pipe out of the first pipe.3. The mouse of claim 2 , wherein the top cover comprises a top plate claim 2 , a left-mouse-click key claim 2 , and a side plate adjacent to the left-mouse-click key claim 2 , the receiving hole is defined on the side plate adjacent to the left-mouse-click key claim 2 , the supporting device further comprises a fixing end and a connecting end connecting to the fixing end claim 2 , the fixing end is capable of moving in the receiving hole claim 2 , the connecting end is capable of sliding out of the receiving hole claim 2 , the end of the second pipe opposite to the light is rotatably connected to the connecting end.4. The mouse of claim 1 , wherein the mouse further comprises a cable claim 1 , a power end claim 1 , and a battery claim 1 , the cable is configured for electrically connecting the mouse to a computer ...

SOCKET PROTECTION DEVICE AND CIRCUIT BOARD ASSEMBLY

A socket protection device includes a fixing member, a cover, a limiting member, and an operation member. The fixing member is secured to a circuit board. The fixing member includes a pair of first connecting blocks. The cover includes a second connecting block, a first latching portion, and a second latching portion. The limiting member is secured to the circuit board. The operation member includes a shaft and an operation rod secured to the shaft. The shaft rotatably connects the cover to the fixing member via the first and second connecting blocks. When the operation rod is pressed to drive the shaft to rotate, the cover is rotated toward the socket. When the cover covers the socket, the first latching portion latches the limiting member, and the second latching portion latches the operation rod. 1. A socket protection device comprising:a fixing member to be secured to a circuit board and adjacent to a sidewall of a socket on the circuit board, the fixing member comprising a pair of first connecting blocks parallel to each other, each of the first connecting blocks defining a first shaft hole;a cover comprising a second connecting block defining a second shaft hole, and a first latching portion and a second latching portion which are arranged opposite to the second connecting block;a limiting member to be secured to the circuit board and opposite to the fixing member across of the socket; andan operation member comprising a shaft and an operation rod perpendicular secured to the shaft, the shaft passing through one of the first shaft holes, the second shaft hole, and the other one of the first shaft holes in sequence to rotatably connect the cover to the fixing member;wherein, when the operation rod is pressed to drive the shaft to rotate, the cover is rotated toward the socket by the rotation of the shaft, when the cover covers the socket, the first latching portion latches the limiting member, and the second latching portion latches the operation rod.2. The ...

Motherboard alarm system test circuit

A motherboard alarm system test circuit includes an infrared emitter, a memory, and a circuit board. The circuit board includes a memory slot, many edge connectors, an infrared receiver, a single chip computer, and a switch circuit. The memory slot includes many spaced metal sheets. One end of each metal sheet is electrically connected to one of the first golden fingers of the memory. Each edge connector is electrically connected to the other end of each metal sheet. The second golden fingers of the circuit board are electrically connected to the memory slot. The signal chip computer includes an input pin electrically connected to the infrared receiver. The switch circuit is electrically connected to the signal chip computer. The switch circuit controls an electrical connection between the plurality of metal sheets and the plurality of first golden fingers of the memory.

SUSPENSION, HEAD GIMBAL ASSEMBLY AND DISK DRIVE UNIT WITH THE SAME

A suspension for a head gimbal assembly includes a flexure having a laminated structure including a substrate layer, an insulating layer formed on the substrate layer, and a conducting layer formed on the insulating layer. And first bonding pads are formed on the conducting layer at a first surface of the flexure, so as to electrically connect with a slider via solder balls, and second bonding pads are formed on the substrate layer at a second surface of the flexure opposite to the first surface, so as to electrically connect with extra components formed at the second surface via solder balls. The suspension can connect slider and other extra components at two opposite surfaces of the flexure with a simplified and compacted structure and a reduced cost. 1. A suspension for a head gimbal assembly , comprising:a flexure having a laminated structure comprising a substrate layer, an insulating layer formed on the substrate layer, and a conducting layer formed on the insulating layer, wherein first bonding pads are formed on the conducting layer at a first surface of the flexure, so as to electrically connect with a slider of the head gimbal assembly via solder balls, and second bonding pads are formed on the substrate layer at a second surface of the flexure opposite to the first surface, so as to electrically connect with extra components formed at the second surface via solder balls.2. The suspension as claimed in claim 1 , wherein both of the first and second bonding pads comprise at least one coating between a gold coating and a nickel coating.3. The suspension as claim in claim 2 , wherein each first bonding pad comprises a nickel coating formed on the conducting layer claim 2 , and a gold coating formed on the nickel coating.4. The suspension as claim in claim 2 , wherein each second bonding pad comprises a nickel coating formed on the substrate layer claim 2 , and a gold coating formed on the nickel coating.5. The suspension as claimed in claim 1 , further ...

MONITOR WITH PERSONAL SYSTEM/2 KEYBOARD INTERFACE

A monitor for a computer includes a display screen, a frame fixing the display screen, a display circuit, a personal system (PS)/2 keyboard interface, a power circuit, and a monitor video interface. The PS/2 keyboard interface is disposed on the frame, and includes a data signal pin, a clock signal pin, a power pin, and a ground pin. The power circuit powers the display circuit and the PS/2 keyboard interface. The monitor video interface includes video pins, first and second idle pins. The video pins are connected to the display circuit. The first idle pin is connected to the data signal pin. The second idle pin is connected to the clock signal pin. 1. A monitor for a computer , the monitor comprising:a display screen;a frame fixing the display screen;a display circuit to control the display screen;a personal system (PS)/2 keyboard interface disposed on the frame, and comprising a data signal pin, a clock signal pin, a power pin, and a ground pin;a power circuit connected to the display circuit to power the display circuit, and connected to the power pin to power the PS/2 keyboard interface; anda monitor video interface mating with a motherboard video interface of the computer, the monitor video interface comprising a plurality of video pins connected to the display circuit, a first idle pin connected between the data signal pin of the PS/2 keyboard interface and a second idle pin of the motherboard video interface which is connected to a keyboard data signal pin of a south bridge chip of the motherboard, and a third idle pin connected between the clock signal pin of the PS/2 keyboard interface and a fourth idle pin of the motherboard video interface which is connected to a keyboard clock signal pin of the south bridge chip.2. The monitor as claimed in claim 1 , wherein the monitor video interface is a monitor video graphics array (VGA) interface.3. An assembly comprising: a display screen;', 'a frame fixing the display screen;', 'a display circuit to control the ...

TEST CIRCUIT FOR TESTING SHORT-CIRCUIT

A test circuit includes two probes, a comparison circuit, a switch circuit, and an indication circuit. The probes are connected to an electronic component to be tested, and a low level signal is output if the electronic component is short-circuited. The comparison circuit outputs a comparison signal based on the shorting signal from the probes. The switch circuit outputs a switch signal based on the comparison signal from the comparison circuit. The indication circuit indicates that the electronic component is short-circuited or not short-circuited based on the switch signal fro m the switch circuit. 1. A test circuit for testing whether an electronic component is short-circuited , the test circuit comprising:two probes for contacting opposite ends of the electronic component, and outputting a shorting signal in response to the electronic component being short-circuited;a comparison circuit outputting a comparison signal based on the shorting signal from the probes;a switch circuit outputting a switch signal based on the comparison signal from the comparison circuit; andan indication circuit for indicating that the electronic component is short-circuited or is not short-circuited based on the switch signal from the switch circuit.2. The test circuit of claim 1 , wherein the probes comprises a first probe and a second probe claim 1 , first ends of the first and second probes are used for contacting the ends of the electronic component claim 1 , a second end of the second probe is grounded claim 1 , and a second end of the first probe outputs the shorting signal in response to the electronic component being short-circuited claim 1 , the shorting signal is a low level voltage signal.3. The test circuit of claim 2 , wherein the comparison circuit comprises a first transistor claim 2 , a comparator claim 2 , and first to third resistors claim 2 , a base of the first transistor is connected to a direct current (DC) power source through the first resistor claim 2 , a ...

Electronic locking assembly

An electronic locking assembly includes an electronic lock and an electronic key for unlocking the electronic lock. The electronic key includes a first memory for storing a first password, and a first signal transceiver for encoding the first password into a first wireless signal and transmitting the first wireless signal. The electronic lock includes a main body for physically locking or unlocking the device, a second memory for storing a second password, a second signal transceiver, a processor, and a comparator. The second signal transceiver receives the first wireless signal and decodes the first wireless signal into the first password. The processor sends the first password and the second password to the comparator. The comparator compares whether the first password second password match, and thus to control the main body to physically lock or unlock the device.

INTERFACE DEVICE FOR INPUT DEVICE

An interface device for input device includes a motherboard, a connector, a first video graphics array (VGA) interface electronically connected to motherboard, a second VGA interface electronically connected with the first VGA interface and a display. The connector is positioned on the display and electronically connected to the second VGA interface. The motherboard controls the connector via the first VGA interface and the second VGA interface to communicate with an input device mated with the connector. 1. An interface device for input device , comprising:a motherboard;a first video graphics array (VGA) interface electronically connected to the motherboard;a second VGA interface positioned on a display;a VGA cable electronically connecting the first VGA interface with the second VGA interface; anda connector positioned on the display and electronically connecting to the second VGA interface, the connector configured to mate with an input device such that the input device communicates with the motherboard via the connector, the second VGA interface, the VGA cable, and the first VGA interface.2. The interface device for input device as claimed in claim 1 , wherein the input device is a mouse or a keyboard.3. The interface device for input device as claimed in claim 1 , wherein the motherboard comprises a first controlling pin claim 1 , a second control pin and a power source claim 1 , the first VGA interface comprises a first pin electronically connected to the first controlling pin claim 1 , a second pin electronically connected to the second control pin claim 1 , a power source pin electrically connected to the power source and a ground pin connected to ground claim 1 , the second VGA interface comprises a third pin claim 1 , a fourth pin claim 1 , a power source pin and a ground pin electronically connected to the first pin claim 1 , the second pin claim 1 , the power source pin and the ground pin respectively of the first VGA interface via the VGA cable claim 1 ...

Resistance measurement circuit

A resistance measuring circuit for measuring a resistor includes an amplifier, a transistor, a variable resistor, a first resistor, and a second resistor. The transistor includes a base connected to the output of the amplifier, a collector connected to a direct current (DC) power supply, and an emitter. The first resistor includes a first terminal connected to the DC power source, and a second terminal grounded through the variable resistor and connected to the non-inverting terminal of the amplifier. The second resistor includes a first terminal connected to the inverting terminal of the amplifier and connected to the emitter of the transistor through the resistor to be measured, and a second terminal grounded.

TEST DEVICE FOR PRINTED CIRCUIT BOARD

A test device for testing a printed circuit board (PCB) includes a base and a measuring device. The measuring device includes a testing pin and is capable of measuring any desired point of the PCB on condition that the pin makes contact with the point at an included angle between the pin and a back surface of the PCB which is larger than a predetermined angle. The distance between the base and the PCB satisfies: H>L tan θ, where H is the vertical distance between the PCB and the base, L is the maximum length of an orthogonal projection of the pin on the PCB when the pin is contacting the point, and θ is the predetermined angle. 2. The test device of claim 1 , wherein each bolt sleeve comprises a columnar section engaging with a corresponding first threaded hole and a sleeve section extending from an end of the columnar section along an axial direction of the columnar section claim 1 , the diameter of each columnar section is smaller than the outer diameter of the corresponding sleeve section claim 1 , forming a stepped surface between each columnar section and the corresponding sleeve section and abutting the supporting surface claim 1 , each sleeve section defines a second threaded hole in a surface opposite to the corresponding columnar section claim 1 , the outer diameter of each sleeve section is larger than the diameter of the corresponding through hole claim 1 , and the sleeve section contacts the back surface.3. The test device of claim 1 , wherein the base comprises a cover and a bottom plate claim 1 , the cover is made of rigid material and includes a rectangular supporting plate and an outer sidewall extending downward from the edge of the supporting plate claim 1 , the outer sidewall defines a plurality of engaging grooves claim 1 , the bottom plate is made of nonrigid material and defines a receiving groove fittingly receiving the cover claim 1 , the receiving groove is bounded by an inner sidewall claim 1 , the bottom plate comprises a plurality of ...

FAN MODULE

A fan module includes a fan, a bracket, a number of first fasteners, and a number of second fasteners. The bracket includes a base wall defining a number of locking holes. The fan includes a side plate defining a number of mounting holes. Each of the first fasteners includes a pole, a head portion, and a locking portion. A through hole is defined in the first fastener. A block protrudes on an inner surface of the through hole of the first fastener, aligning with the locking portion. Each of the second fasteners includes a shaft. The pole extends through the locking hole and the mounting hole of the fan. The shaft extends through the through hole of the first fastener to engage with the block, to deform the locking portion. Therefore the locking portion is locked to an inner surface of the side plate of the fan. 1. A fan module , comprising:a bracket comprising a base wall defining a plurality of locking holes;a fan comprising a side plate defining a plurality of mounting holes aligning with the locking holes of the base wall;a plurality of first fasteners each comprising a pole, and a head and a fixing portion respectively formed from opposite ends of the pole, wherein a through hole is axially defined in each first fastener; a block protrudes on an inner surface of the fixing portion; anda plurality of second fasteners each corresponding to one of the first fasteners, wherein each of the second fasteners comprises a shaft;wherein the pole of each of the first fasteners extends through one of the locking holes of the base wall and the corresponding mounting hole of the fan; the fixing portion extends through and expose out of the mounting hole and is positioned at an inner side of the side plate of the fan, the shaft of a corresponding second fastener is inserted into the through hole of the first fastener; the shaft presses the block to deform the fixing portion out to form a stop portion protruding on the outer surface of the fixing portion, the stop portion ...

CIRCUIT BOARD WITH HANDLES

The circuit board includes a main body, at least one handle, and at least one connecting element. The main body defines at least one through hole. One end of each of the at least one handle defines a positioning portion. The positioning portion of each of the at least one handle extends through a corresponding one of the at least one through hole and is engaged with one of the at least one connecting elements. 1. A circuit board comprising:a main body defining at least one through hole;at least one handle, one end of each of the at least one handle defining a positioning portion; andat least one connecting element;wherein the positioning portion of each of the at least one handle extends through a corresponding one of the at least one through hole and is engaged with one of the at least one connecting elements.2. The circuit board as recited in claim 1 , wherein a top of each of the at least one handle is curved.3. The circuit board as recited in claim 1 , wherein the number of the at least one handle is two.4. The circuit board as recited in claim 3 , wherein the two handles are fixed in a diagonal line of the body.5. The circuit board as recited in claim 1 , wherein the positioning portion of each of the at least one handle defines an internally threaded blind hole claim 1 , each of the at least connecting element is a screw that fits the blind hole claim 1 , and the positioning portion extends through the corresponding through hole and the corresponding screw is screwed into the positioning portion.6. The circuit board as recited in claim 1 , wherein an external surface of one end of the positioning portion of each of the at least one handle defines outer screw threads claim 1 , the corresponding connecting element is a nut claim 1 , and the positioning portion extends through the corresponding through hole and the positioning portion is screwed into the corresponding nut.7. The circuit board as recited in claim 1 , wherein each of the at least one handle is “T” ...

Fixing device for use with expansion cards in a computer

A fixing device for use with at least one expansion card in a computer chassis includes a positioning member and a fixing member. One side of the positioning member defines at least one first slot. The fixing member includes a fixing portion and a rotatable portion rotatablely connected to the fixing portion. The fixing portion defines at least one second slot corresponding to the at least one first slot. When the rotatable portion is able to rotate to a position where the at least one first slot face to the at least one second slot, allowing opposite sides of the free end of the at least one expansion card.

Mounting apparatus for expansion cards

A mounting apparatus for mounting expansion cards to expansion slots set on a circuit board includes a bracket and a number of mounting members. The bracket includes two racks opposite to each other and fixed to the circuit board. A number of spaced bars extend from the mounting piece. Each mounting member includes a fixing plate fixed to a corresponding bar, a locking portion extending from a top of the fixing portion. Two parallel raised portions protrude on an inner surface of the fixing plate to sandwich a corresponding end of the corresponding expansion card. The locking portion abuts against the top of the corresponding expansion card.

FIXING DEVICE FOR USE WITH EXPANSION CARDS IN A COMPUTER

A fixing device for use with at least one expansion card in a computer chassis includes a support member fixed to the chassis and a fixing member rotatably connected to the support member. The fixing member includes at least one fixing portion to receive the free end of the at least one expansion card and a locking member. The locking member resists against the support member and is restrained by the support member, thereby locking the fixing portion, thereby locking the free end of the at least one expansion card. 1. A fixing device for use with at least one expansion card in a computer chassis , each of the at least one expansion card comprising a fixed end fixed to the computer chassis and a free end , the fixing device comprising:a support member fixed to the chassis; anda fixing member rotatably connected to the support member and comprising a fixing portion configured to receive the free end of each of the at least one expansion card and a locking member, wherein the locking member resists against the support member and is restrained by the support member, thereby locking the free end of each of the at least one expansion card.2. The fixing device as described in claim 1 , wherein the support member further comprises a receiving portion claim 1 , a connecting portion connected to one side of the receiving portion claim 1 , and a locking portion connected to another side of the receiving portion and opposite to the connecting portion; the connecting portion comprises a projection positioned above a bottom of the receiving portion claim 1 , the projection and the bottom of the receiving portion each define a hole aligned with each other; the fixing member is received in the receiving portion and comprises two posts respectively received in the holes of the projection and the bottom of the receiving portion to allow the fixing member to rotate about the posts.3. The fixing device as described in claim 2 , wherein the locking member protrudes from an end of the ...

AIR DUCT

An air duct for guiding airflow of a fan includes a cover and an auxiliary plate. The cover includes a base plate, and a first side plate and a second side plate extending from a first side surface of the base plate. The auxiliary plate is slidably attached to the first side surface of the base plate between the first side plate and the second side plate, in a direction substantially parallel to the first and second side plates. 1. An air duct comprising:a cover comprising a base plate, and a first side plate and a second side plate extending from a first side surface of the base plate; andan auxiliary plate slidably attached to the first side surface of the base plate between the first side plate and the second side plate, and slidable in a direction substantially parallel to the first and second side plates.2. The air duct of claim 1 , wherein the first and second side plates each define a slide slot claim 1 , the auxiliary plate comprises a main body and two pins extending from opposite ends of the main body claim 1 , the pins slidably engage in the slide slots of the corresponding first and second side plates.3. The air duct of claim 2 , wherein two spaced flanges are formed on a first side surface of the main body claim 2 , a locking slot is defined between the flanges claim 2 , a first raised portion and a second raised portion are formed from the first side surface of the base plate between the first side plate and the second side plate claim 2 , either the first raised portion or the second raised portion engages in the locking slot to position the auxiliary plate at two different positions of the base plate claim 2 , respectively.4. The air duct of claim 3 , wherein a skidproof portion is formed on a second side surface of the main body opposite to the flanges claim 3 , for convenient operation the auxiliary plate.5. The air duct of claim 1 , wherein the auxiliary plate comprises a sloped guiding portion formed from a side of the auxiliary plate.6. An ...

RECEPTION APPARATUS FOR CABLES AND ELECTRICAL CONNECTION DEVICE USING SAME

A reception apparatus for flexible cable modules includes a plurality of holding units. Each of the holding units includes two holding bars and a holding board. The two holding bars are parallel to each other, and the two holding bars of each of the holding units are rotatably assembled with the two holding bars of a next one of the holding units to rotatably assemble all of the holding units one by one and form assemble apertures between adjacent ones of the holding board. The flexible cable modules repeatedly pass through selected ones of the assembling apertures to be held on the reception apparatus. 1. A reception apparatus for flexible cable modules , comprising:a plurality of holding units, each of the holding units including two holding bars and a holding board; the two holding bars being parallel to each other, the holding board holding the two holding bars together lengthwise;wherein the two holding bars of each of the holding units are rotatably assembled with the two holding bars of a next one of the holding units to rotatably assemble all of the holding units one by one, and wherein a length of each of the holding boards is less than lengths of the two holding bars held by the holding board such that assembling apertures are formed between adjacent ones of the holding boards, and the flexible cable modules repeatedly pass through selected ones of the assembling apertures to be held on the reception apparatus.2. The reception apparatus as claimed in claim 1 , wherein each of the holding bars defines assembling holes in both two ends of the holding bar.3. The reception apparatus as claimed in claim 2 , further comprising a plurality of rotation units claim 2 , each of the rotation units including a shaft claim 2 , and the shafts assembled in the assembling holes of the holding units to rotatably assemble the holding units one by one.4. The reception apparatus as claimed in claim 3 , wherein one of the shafts of the rotation units is assembled in two of the ...

Peripheral component interconnect card fastening device

A PCI card fastening device for fastening a PCI card to a chassis includes a latching plate fixed to the PCI card, a latching element slidably fixed to the chassis and a locking element. The latching element includes a latching hole and a latching portion. The locking element is rotatably fixed to the latching element, the locking element includes a pressing board and a hook, the hook includes a securing block. The latching plate is latched to the latching portion, the securing block is latched in the latching hole to latch the locking element to the latching element. After the securing block is released from the latching hole, the pressing board moves away from the latching element to release the latching plate between the pressing arm and the latching element.

POWER MEASURING SYSTEM

A power measuring system for measuring a turning-on power, a turning-off power, and a turned-on power of a first field-effect transistor includes a pulse driver, a first resistor, a processing unit, and an indication unit. The pulse driver generates square wave signals. The processing unit samples voltages at the source and the drain of the first field-effect transistor, and at the first and second terminals of the first resistor at the moment when the square wave signals changes from low to high or from high to low, and calculates the turning-on power, the turning-off power, and the turned-on power of the first field-effect transistor. The indication unit displays the turning-on power, the turning-off power, and the turned-on power of the first field-effect transistor. 1. A power measuring system for measuring a turning-on power , a turning-off power , and a turned-on power of a first field-effect transistor , the power measuring system comprising:a pulse driver to generate square wave signals, wherein the pulse driver comprises a first pin, a gate of the first field-effect transistor is connected to the first pin of the pulse driver, a source of the first field-effect transistor is grounded;a first resistor, wherein a drain of the first field-effect transistor is connected to a power supply through the first resistor;a processing unit comprising a first pin connected to the source of the first field-effect transistor, a second pin connected to the drain of the first field-effect transistor, a third pin connected to the first pin of the pulse driver, a fourth pin connected to a node between the first resistor and the power supply, wherein the processing unit samples voltages at the source, the drain of the first field-effect transistor, and two terminals of the first resistor at the moment when a level of the square wave signals changes, and calculates the turning-on power, the turning-off power, and the turned-on power of the first field-effect transistor; andan ...

Power supply system for air conditioner of car

A power supply system for an air conditioner of a car includes a battery, an alternator, a detection circuit to detect whether the alternator is operating and outputting a detection signal according to the detection result, a processing unit to output a control signal according to the detection signal, and a switching circuit to connect either the battery or the alternator to the air conditioner.

CIRCUIT FOR CLEARING COMPLEMENTARY METAL OXIDE SEMICONDUCTOR INFORMATION

A circuit for clearing complementary metal oxide semiconductor (CMOS) information of a CMOS chip includes a battery, first to fifth resistors, first and second electronic switches, a switching unit, and first and second diodes. The circuit can clear information of the CMOS chip when one or more switches are activated. 1. A circuit for clearing complementary metal oxide semiconductor (CMOS) information of a CMOS chip , the circuit comprising:a battery;first to fourth resistors;first and second electronic switches each comprising a control terminal, a first terminal, and a second terminal;a switching unit; andfirst and second diodes, wherein an anode of the first diode is connected to a first standby power, a cathode of the first diode is connected to a cathode of the second diode, an anode of the second diode is connected to a positive terminal of the battery through the first resistor, a negative terminal of the battery is grounded, the cathode of the second diode is connected to the first terminal of the first electronic switch and a control terminal of the second electronic switch, a control terminal of the first electronic switch is connected to a second standby power through the second resistor, the second terminals of the first and second electronic switches are grounded, the cathode of the second diode is further connected to the first terminal of the second electronic switch through the third resistor, the switching unit, and the fourth resistor in that order, a node between the third resistor and the switching unit is connected to a reset terminal of the CMOS chip;wherein the first and second electronic switches are turned on in response to the control terminals receiving high level voltage signals.2. The circuit of claim 1 , wherein the switching unit comprises two switches connected in series.3. The circuit of claim 1 , further comprising a capacitor claim 1 , wherein the cathode of the second diode is grounded through the capacitor.4. The circuit of claim ...

FIXING APPARATUS FOR EXPANSION CARD

An apparatus for fixing an expansion card includes a circuit board, a fixing device, and a latching device. The expansion card includes a protrusion formed on a first end of the expansion card, and a positioning hole defined adjacent to a second end of the expansion card away from the first end. The fixing device is mounted to the circuit board for supporting the first end of the expansion card, and defines a through hole for allowing the protrusion of the expansion card to extend through the through hole. The latching device is mounted to the circuit board for supporting the second end of the expansion card, and includes a post for engaging in the positioning hole of the expansion card, and a resilient hook for engaging with a top of the expansion card. 1. A fixing apparatus for an expansion card , the expansion card comprising a protrusion formed on a first end of the expansion card , and a positioning hole defined adjacent to a second end of the expansion card away from the first end , the fixing apparatus comprising:a circuit board;a fixing device mounted to the circuit board for supporting the first end of the expansion card, the fixing device defining a through hole, for allowing the protrusion of the expansion card to extend through the through hole; anda latching device mounted to the circuit board, for supporting the second end of the expansion card, the latching device comprising a post for engaging in the positioning hole of the expansion card, and a resilient hook for engaging with a top of the expansion card.2. The fixing apparatus of claim 1 , wherein the fixing device comprises a block mounted to the circuit board claim 1 , and a retaining portion formed on a top of the block claim 1 , the through hole is defined in the retaining portion.3. The fixing apparatus of claim 2 , wherein the retaining portion is a bent metal rod claim 2 , and includes two opposite arms connected to the top of the block claim 2 , and an arc-shaped connecting portion ...

AUDIO TEST CABLE

An audio test cable includes three types of audio input and output (I/O) ports. The input port and the output port in each type of audio I/O ports form a short circuit for carrying a loopback test for a motherboard. The audio test cable also includes a test audio jack which connects to the output port of all types of audio I/O ports for carrying out an audio-quality test for the motherboard. 1a test audio jack for mating with a test audio connector of a speaker or an earphone;an input audio connector for mating with an input audio jack of a motherboard;an output audio connector for mating with an output audio jack of a motherboard;an input pin header socket for mating with an input pin header of a motherboard;an output pin header socket for mating with an output pin header of a motherboard;an input jack and socket (JST) female for mating with an input JST of a motherboard;an output JST female for mating with an output JST of a motherboard; anda plurality of cables; whereineach of the test audio jack, the input audio connector, the output audio connector, the input pin header socket, the output pin header socket, the input JST female and the output JST female comprises a left channel (LC) positive terminal, a right channel (RC) positive terminal and two grounding terminals, the LC positive terminals form a short circuit using the cables, the RC positive terminals form a short circuit using the cables, the grounding terminals form a short circuit using the cables.. A test cable, comprising: 1. Technical FieldThe present disclosure relates to test devices and, particularly, to an audio test cable.2. Description of Related ArtMotherboards typically include audio input and output (I/O) ports for inputting and outputting audio signals. After being assembled, the motherboards need to pass various audio tests to ensure quality. However, there are three types of audio I/O ports, such as an audio jack, a pin header, and a jack and socket (JST), and two types of audio tests, ...

MOUNTING DEVICE FOR OPTICAL DISK DRIVE

A mounting device for mounting an optical disk drive (ODD) includes a rack and a fixing member. The rack defines an opening in a front side through which the ODD extends into the rack. A blocking plate is formed at a rear end of the rack to block a back end of the ODD. Two bars are formed between the opening and the blocking portion to sandwich the ODD. The fixing member is pivotally mounted to a side of the opening to block a front end of the ODD. 1. A mounting device for fixing an optical disk drive (ODD) , the mounting device comprising:a rack comprising an opening defined in a front end thereof for accessing the ODD, a blocking plate formed at a rear end thereof to block a rear end of the ODD, two bars formed between the blocking plate and the opening to contact sidewalls of the ODD, and an installing member formed on a side of the opening; anda fixing member pivotably mounted to the installing member to block a front end of the ODD.2. The mounting device of claim 1 , wherein an elastic member is attached to the blocking plate to resist against the rear end of the ODD.3. The mounting device of claim 2 , wherein the elastic member comprises a connecting tab attached to the blocking plate claim 2 , and two symmetrical urging tabs slantingly extending from opposite ends of the connecting tab.4. The mounting device of claim 1 , wherein the rack further comprises a bottom wall claim 1 , the blocking plate perpendicularly extends from the bottom wall; two blocking tabs extend from the bottom wall claim 1 , located beside the blocking plate and in alignment with the blocking plate.5. The mounting device of claim 4 , further comprising a pole claim 4 , wherein the installing member comprises two parallel side boards each defining a through hole claim 4 , and an end board connected between the front side of the two side boards and defining an entry claim 4 , the fixing member comprises two parallel clamping boards each defining an engaging hole claim 4 , the clamping ...

MOUNTING DEVICE FOR FAN

A mounting device for fixing a fan includes a board, and a frame mounted to an end of the fan. The board defines a vent. Two L-shaped blocking pieces are formed on the board at opposite sides of the vent. The frame is sandwiched between the blocking pieces and the board. 1. A mounting device for fixing a fan , comprising:a board defining a first vent, wherein two L-shaped blocking pieces facing each other extend from the board at opposite sides of the first vent; anda frame to be mounted to an end of the fan, and sandwiched between the blocking pieces and the board.2. The mounting device of claim 1 , wherein the frame comprises a plate defining a second vent aligning with the first vent claim 1 , and a surrounding wall extending from sides of the plate to receive the fan; two inserting pieces extend from opposite sides of the plate to be inserted between the blocking pieces and the board.3. The mounting device of claim 2 , further comprising a plurality of fasteners extending through the plate to be engaged in the fan.4. The mounting device of claim 3 , wherein the fasteners are made of an elastic material.5. The mounting device of claim 4 , wherein each fastener comprises a head and an extension portion extending from the head claim 4 , two parallel slots are defined in the extension portion to be respectively engaged with the plate and the fan. 1. Technical FieldThe present disclosure relates to a device for fixing a fan.2. Description of Related ArtMany electronic devices use fans to cool electronic components. A fan may be mounted in an electronic device with screws, which is difficult and time-consuming when installing or removing the fan.The disclosure, including the accompanying drawings, is illustrated by way of example and not by way of limitation. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one.Referring to , an exemplary embodiment of a ...

FAN SPEED DETECTION DEVICE

A fan speed detection circuit includes a counter, an integrating circuit, a current regulation circuit, a connector and a matching circuit. The connector electrically connects to the current regulation circuit and a fan. The counter outputs a pulse signal, the integrating circuit receives the pulse signal from the counter, and converts the pulse signal from the counter into a corresponding analog command signal. The current regulation circuit adjusts the current from the integrating circuit according to the command signal and outputs the adjusted current to the connector. The matching circuit converts the voltage from the connector and provides a suitable voltage for activating the counter to enable the counter to detect and quantify and record the rotation speed of the fan in all circumstances. 1. A fan speed detection circuit comprising:a counter for outputting a pulse signal;an integrating circuit electrically connected to the counter and receiving the pulse signal from the counter;a current regulation circuit electrically connected to the integrating circuit;a connector electrically connected to the current regulation circuit and a fan; anda matching circuit electrically connected to the connector and the counter, wherein the integrating circuit converts the pulse signal from the counter into a corresponding command signal, the current regulation circuit adjusts the current from the integrating circuit according to the command signal and outputs the adjusted current to the connector, and the matching circuit converts the voltage from the connector and provides a suitable voltage for activating the counter.2. The fan speed detection circuit as claimed in claim 1 , wherein the connector comprises a power pin claim 1 , a ground pin and a detection pin claim 1 , the power pin is electrically connected to a first power source claim 1 , and the ground pin is electrically connected to the current regulation circuit claim 1 , the detection pin is electrically connected ...

MOUNTING DEVICE FOR OPTICAL DISK DRIVE

A mounting device for fixing an optical disk drive (ODD) includes a latch and a rack including a bottom wall. Two pins extend out from opposite sides of the ODD. A first plate and a second plate extend up from the bottom wall to sandwich the ODD. a tab extends inward from a back end of one of the first and second plates to block a back end of the ODD. An opening and a slot below and communicating with the opening are defined in each of the first and second plates. The latch is pivotally mounted to the first plate adjacent to the slot. The pins of the ODD extend into the slots through the corresponding openings. One of the pins is blocked by the latch. 1. A mounting device for fixing an optical disk drive (ODD) , which has two sidewalls each forming a pin; the mounting device comprising:a rack comprising a bottom wall, a first plate and a second plate perpendicularly extending up from the bottom wall to sandwich the ODD, a tab extending from a front end of one of the first and second plates to block a back end of the ODD, each of the first and second plates defining an opening extending through a top of the one of the first and second plates, and a slot extending from a rear bottom end of the opening and communicating with the opening, wherein the pins of the ODD respectively extend through the openings to engage in the corresponding slots; anda latch movably mounted to the first plate to block the pin engaged in the corresponding slot of the first plate.2. The mounting device of claim 1 , wherein the latch comprises a main body pivotally mounted to the outer surface of the first plate claim 1 , a projection extends from a front end of the main body and aligns with the corresponding opening of the first plate claim 1 , to block the corresponding pin in the slot of the first plate.3. The mounting device of claim 2 , wherein the latch further comprises an arm slantingly extending down and forward from a rear end of the main body and contacting the bottom wall claim 2 , ...

ANTI-SAG APPARATUS FOR EXPANSION CARDS

An anti-sag apparatus is mounted in a chassis for supporting an expansion card. The anti-sag apparatus includes a fixing bracket, a mounting member, and a supporting module. The mounting member defines a slide slot and a positioning hole communicating with the slide slot. The supporting module includes a supporting member, a manipulation member, and a resilient element arranged between the supporting member and the manipulation member. The manipulation member includes a pole forming a neck able to slide through the slide slot, and a locking portion sized to be stopped from entering the slide slot. When the pole is placed in the positioning hole, the supporting member supports the expansion card. When the pole is driven to slide along the slide slot, the supporting member disengages from the expansion card. 1. An anti-sag apparatus for an expansion card mounted in a chassis , the anti-sag apparatus comprising:a mounting member fixed to the chassis, and comprising a positioning portion, the positioning portion defining a long slide slot and a positioning hole communicating with the slide slot; and a supporting member coupled to the mounting member and slidable along the slide slot; and', 'a manipulation member mounted to the supporting member, and comprising a pole extending through the supporting member, the pole forming a neck adjacent to a distal end of the pole and a locking portion at the distal end; the locking portion being sized to be stopped from entering the slide slot of the mounting member; the neck being sized to slide in the slide slot;, 'a supporting module comprisingwherein the supporting member supports the expansion card in response to the pole being slid into the positioning hole of the mounting member, the manipulation member is movable between a locked position, where the locking portion of the pole is received in the positioning hole of mounting member, and an unlocked position, where the neck of the pole is received in the positioning hole, ...

Network status indication system and mouse with network status indication function

A network status indication system includes a network controller, a first personal system (PS)/2 interface, and a mouse. The first PS/2 interface includes first and second idle pins. The mouse includes a second PS/2 interface, and first and second indicators. When the network controller determines that the first PS/2 interface is connected to the network, the network controller controls the first indicator to emit light. When the network controller determines that the first PS/2 interface is transmitting or receiving data with the network, the network controller controls the second indicator to flicker.

CUTTING MECHANISM AND CUTTING DEVICE USING THE SAME

A cutting mechanism for cutting a pipe includes a fixing board, a cutter mounted on the fixing board and a driving assembly. The cutter includes a base body, and a blade positioned on the base body. The driving assembly is mounted on the fixing board for driving the pipe move to the blade to be cut into pieces of certain lengths. 1. A cutting mechanism for cutting pipes , comprising:a fixing board; a base body, and', 'a blade positioned on the base body; and, 'a cutter mounted on the fixing board, comprisinga driving assembly mounted on the fixing board for driving the pipe move to the blade to be cut into pieces of certain lengths.2. The cutting mechanism of claim 1 , wherein the cutter further comprises a pushing block is movably positioned on the base body relative to the blade; and the pushing block pushes the pipes to the blade.3. The cutting mechanism of claim 1 , wherein the driving assembly comprises a driver positioned at the fixing board claim 1 , a driving wheel rotatably connected with the fixing board above of the cutter claim 1 , and a driven wheel positioned at the fixing board above the cutter; the driving wheel is positioned between the driver and the driven wheel claim 1 , the pipe is clamped between the driving wheel and the driven wheel; and the driving wheel is driven to rotate by the driver to drive the pipe move to the blade.4. The cutting mechanism of claim 3 , wherein the driven wheel is rotatably positioned at the fixing board above the cutter claim 3 , and the driven wheel is driven to rotate by the driving wheel.5. The cutting mechanism of claim 4 , wherein the driving assembly further comprises a pair of pulley wheels and a strap claim 4 , the pair of pulley wheels are positioned at an surface opposite to the driver claim 4 , the pulley wheels sleeve respectively on the rotating shaft of the driver wheel and the driving wheel claim 4 , and the strap runs over the pair of pulley wheels.6. The cutting mechanism of claim 3 , wherein the ...

FIXING DEVICE FOR DATA STORAGE DEVICE

A fixing device for fixing a data storage device includes a rack, an engaging member, and a resilient member. The rack includes a bottom plate, a first plate and a second plate protruding from the bottom plate. The resilient member is fixed to the bottom plate is permanently deformed by, and bears against, the data storage device when in place. Two pins protrude from an inner surface of the first plate to detachably engage in a first sidewall of the data storage device. A stopping tab extends from the engaging member to detachably block a top of the data storage device. 1. A fixing device for fixing a data storage device , comprising:a rack comprising a bottom plate, a first plate perpendicularly extending up from the bottom plate to abut a first sidewall of the data storage device, and a second plate perpendicularly extending up from the bottom plate and parallel to the first plate to abut a second sidewall of the data storage device opposite to the first sidewall, two pins protruding from an inner surface of the first plate toward the second plate to detachably engage in the first sidewall of the data storage device;a resilient member fixed to the bottom plate to be resiliently sandwiched between the bottom plate and the data storage device; andan engaging member comprising a first end fixed to an outer surface of the second plate, and a second end operable to be deformed away from the second plate, a stopping tab extending towards the first plate from a top of the second end of the engaging member, to detachably block a top of the data storage device.2. The fixing device of claim 1 , wherein an L-shaped limitation portion extends outward from the top of the second plate claim 1 , to limit the deformation of the engaging member.3. The fixing device of claim 1 , wherein the resilient member is a sheet of resilient metal claim 1 , the resilient member is arced up to form a shallow arch claim 1 , an end of the resilient member is fixed to the bottom plate. 1. ...

MOUNTING APPARATUS FOR DATA STORAGE DEVICE

A mounting apparatus for mounting a data storage device includes a mounting plate, first and second mounting members, and a connecting member movably connected between the first and second mounting members. The first mounting member is fixed to a side of the data storage device. The connecting member is adjustable to move the second mounting member toward or away from the first mounting member, thereby sandwiching or releasing the data storage device. The mounting members are fixable to the mounting plate. 1. A mounting apparatus for mounting a data storage device , comprising:a mounting plate;first and second mounting members; anda connecting member movably connected between the mounting members;wherein the data storage device is to be fixed to the first mounting member, the connecting member is adjustable to move the second mounting member toward or away from the first mounting member, thereby sandwiching or releasing the data storage device together with the first mounting member, the first and second mounting members are fixable to the mounting plate.2. The mounting apparatus of claim 1 , wherein the mounting plate comprises two locking portions respectively corresponding to the first and second mounting members claim 1 , and defines two positioning holes respectively corresponding to the first and second mounting members claim 1 , each of the first and second mounting members forms a raised protrusion engagable in the corresponding positioning hole and defines a locking slot claim 1 , the corresponding locking portion is locked to the locking slot.3. The mounting apparatus of claim 2 , wherein each locking portion comprises a blocking piece claim 2 , each locking slot comprises a great inlet and a small latching hole communicating with the inlet claim 2 , the blocking piece is insertable into the latching hole through the inlet.4. The mounting apparatus of claim 1 , wherein each of the first and second mounting members comprises a fixing plate attached to a ...

Mounting device for fan

A mounting device for fixing a fan includes a board, a frame, and two shockproof members. The board defines a vent. Two blocking pieces perpendicularly extend from the board at opposite sides of the vent. The frame is sandwiched between the blocking pieces. Two tabs extend from opposite sides of the frame. Each shockproof member is mounted between one of the blocking pieces and a corresponding one of the tabs.

VISUAL DISPLAY CONNECTION CIRCUIT

A connection circuit for a digital visual interface (DVI) includes a platform controller hub (PCH), a DVI, a plurality of voltage dividing resistors, and a switch. The platform controller hub (PCH) includes a plurality of output contacts outputting a plurality of analog signals. The DVI includes a plurality of input contacts, and each input contact is connected to one of the output contacts to transmit the analog signals. The switch has one end connected to the output contacts, and another end grounded. The switch switches on when a power supply is applied to the switch and is switched off when the power supply is not applied to the switch. 1. A connection circuit for a digital visual interface (DVI) comprising:a platform controller hub (PCH) comprising a plurality of output contacts outputting a plurality of analog signals;a DVI comprising a plurality of input contacts, and each of the input contacts connected to one of the output contacts for transmission of the analog signals; anda switch comprising a first end connected to the output contacts, and a second end grounded, the switch switching on when a power supply is applied to the switch and switching off when the power supply is not applied to the switch.2. The connection circuit of claim 1 , wherein the switch is a transistor claim 1 , a source of the transistor is grounded claim 1 , a drain of the transistor is connected to the output contacts by one voltage dividing resistor per contact claim 1 , a gate of the transistor is connected to the power supply.3. The connection circuit of claim 1 , further comprising a plurality of capacitors claim 1 , each of the capacitors is connected between one of the output terminals and one of the corresponding input terminals.4. The connection circuit of claim 2 , wherein a first end of each voltage dividing resistor is connected to a node between one of the capacitors and one of the corresponding output terminals claim 2 , and a second end of each of the voltage dividing ...

EXPANSION CARD WITH CABLE MANAGEMENT APPARATUS

An expansion card includes a card body and a cable management apparatus. The card body includes a number of connecters with a number of cables. The cable management apparatus includes a main body. A first side of the main body is fixed to the card body beside the connectors. A second side of the main body forms a flange. A number of first cable management portions are formed on the flange. A number of second cable management portions extend on the main body. The cables can extend through either the first cable management portions or the second cable management portions. 1. A cable management apparatus comprising:a main body;a flange extending up from a side of the main body, the flange forming a plurality of first cable management portions; anda plurality of second cable management portions extending up from the main body, wherein either the first cable management portions or the second cable management portions allow a plurality of cables to extend through.2. The cable management apparatus of claim 1 , wherein the first cable management portions are arranged along the side of the main body.3. The cable management apparatus of claim 1 , wherein the second cable management portions are arranged along a lengthwise direction of the main body substantially parallel to the side of the main body.4. The cable management apparatus of claim 1 , wherein the flange defines a plurality of cutouts through which the cables extend claim 1 , each of the first cable management portions comprises a cantilever extending into a corresponding cutout from the flange and parallel to the main body claim 1 , and a blocking portion extending down slantingly from a distal end of the cantilever.5. The cable management apparatus of claim 4 , wherein each of the second cable management portions comprises a supporting pole extending up from the main body claim 4 , a connecting pole extending from a top of the supporting pole toward a corresponding one of the first cable management portions claim ...

Fan assembly

A fan assembly includes a fan and a casing receiving the fan. The casing is formed by one-step injection molding and includes a base portion, a cover portion, a connection portion, and a plurality of anti-vibration members. The connection portion is formed by thermal-pressing and rotatably connects the cover portion and the base portion. The anti-vibration members are attached to the cover portion and the base portion and located between the fan and the cover portion and the base portion when the cover portion and the base portion are locked together to absorb vibration and prevent the transmission of the vibration to the casing.

FIXING DEVICE FOR DATA STORAGE DEVICE

A fixing device for fixing a data storage device includes a rack, a fixing member, and a resilient member. The rack includes a bottom plate and two tabs protruding from the bottom plate. Two first pins respectively extend from the tabs to engage in two corresponding holes defined in a first sidewall of the data storage device. The fixing member is slidably mounted on the bottom plate along a direction perpendicular to the tabs. A second pin protrudes from the fixing member to detachably engage in a locking hole defined in a second sidewall of the data storage device. The resilient member is resiliently sandwiched between the rack and the fixing member, to bias the fixing member to move towards the data storage device, thereby making the second pin engage in the locking hole. 1. A fixing device for fixing a data storage device , the fixing device comprising:a rack comprising a bottom plate to support the data storage device and two first tabs protruding up from the bottom plate to abut against a first side of the data storage device, two first pins respectively extending from the first tabs to engage in two corresponding holes defined in the first side of the data storage device;a fixing member slidably attached to the bottom plate along a direction perpendicular to the first tabs, a second pin protruding from the fixing member; anda resilient member resiliently sandwiched between the rack and the fixing member, to bias the fixing member to move towards the first tabs, thereby making the second pin engage in a locking hole defined in a second side of the data storage device opposite to the first side.2. The fixing device of claim 1 , wherein a stopping tab protrudes up from the bottom plate claim 1 , the resilient member is sandwiched between the stopping tab and the fixing member.3. The fixing device of claim 2 , wherein the fixing member comprises a bottom wall claim 2 , the bottom wall defines a recess claim 2 , the recess comprises an end wall adjacent to the ...

MOUNTING APPARATUS FOR EXPANSION CARDS

A mounting apparatus for an expansion card includes a fixing bracket receiving the expansion card, and a supporting member mounted to the fixing bracket. The fixing bracket includes an end plate fixing a rear end of the expansion card. The supporting member includes a support wall substantially parallel to the end plate of the fixing bracket. The support wall includes a holding portion to retain a front end of the expansion card. The supporting member is slidable to render the distance between the supporting member and the end plate of the fixing bracket substantially equal to the lengths of various expansion cards. 1. A mounting apparatus to selectively fix expansion cards with different lengths , the mounting apparatus comprising:a fixing bracket comprising an end plate for fixing first ends of the expansion cards, and a top plate perpendicularly extending forward from a top end of the end plate, the top plate defining a plurality of positioning holes with different distances from the end plate;a supporting member mounted to the fixing bracket, and slidable in a direction perpendicular to the end plate, the supporting member comprising a support wall, and a first mounting wall perpendicularly extending forwards from a side of the support wall, a positioning pin extending up from the first mounting wall to be selectively engaged in one of the positioning holes to position the supporting member, thereby allowing the support wall to hold a second end, opposite to the first end, of one of the expansion cards with a corresponding length.2. The mounting apparatus of claim 1 , wherein the positioning holes are arrayed in a row parallel to the slide direction of the supporting member.3. The mounting apparatus of claim 1 , wherein the top plate of the bracket defines a first slide slot claim 1 , a guiding protrusion extends up from the first mounting wall of the supporting member and is slidably received in the first slide slot.4. The mounting apparatus of claim 3 , ...

FLASH DRIVE WITH PROTECTING CASINGS

A flash drive includes a main body and two casings pivotably installed on the main body. The main body includes a base and a connector. One of a top and a bottom of the base defines a pair of fixing holes and a pair of tapered grooves. Each tapered groove communicates a respective fixing hole to a corresponding one of opposite lateral sides of the base near the fixing hole. Each casing includes a spindle, the spindles of the casings slide along the tapered grooves from the corresponding lateral sides of the base to the corresponding fixing holes until the spindles are snappingly engaged in the fixing holes such that the casings are operable to pivot toward the connector and cooperatively enclose the connector. 1. A flash drive , comprising:a main body comprising a base and a connector, the connector fixed in the base and protruding out of an end of the base, one of a top and a bottom of the base having a pair of fixing holes and a pair of tapered grooves defined therein, each tapered groove communicating a respective fixing hole to a corresponding one of opposite lateral sides of the base near the fixing hole;two casings each comprising a spindle, wherein the spindles of the casings are slideable along the tapered grooves from the corresponding lateral sides of the base to the corresponding fixing holes until the spindles are snappingly engaged in the fixing holes such that the casings are operable to pivot toward the connector and cooperatively enclose the connector.2. The flash drive of claim 1 , wherein a depth of each tapered groove gradually increases from a boundary of the corresponding fixing hole and the tapered groove to the corresponding lateral side of the base.3. The flash drive of claim 2 , wherein a depth of the fixing hole is greater than the depth of the tapered groove at the boundary of the fixing hole and the tapered groove.4. The flash drive of claim 3 , wherein each casing further comprises two plates and an end piece claim 3 , each plate ...

MOUNTING APPARATUS FOR EXPANSION CARDS

A mounting apparatus for mounting an expansion card with a block piece includes a housing, a first mounting member, and a second mounting member. The housing includes a side plate and a base fixed to the side plate. The first mounting member is pivotably attached to the base. The second mounting member is pivotably attached to the side plate. The first mounting member is pivotable to press the block piece of the expansion card on the base, the second mounting member is pivotable to abut against the first mounting member toward the block piece. 1. A mounting apparatus for mounting an expansion card with a block piece , comprising:a housing comprising a side plate and a base fixed to the side plate;a first mounting member pivotably attached to the base; anda second mounting member pivotably attached to the side plate above the first mounting member, wherein the first mounting member is pivotable to press the block piece of the expansion card on the base, the second mounting member is pivotable to abut against the first mounting member toward the block piece.2. The mounting apparatus of claim 1 , wherein the block piece comprises a bent portion supported on the base claim 1 , the bent portion defines a cutout claim 1 , a protrusion protrudes on the base and engages in the cutout.3. The mounting apparatus of claim 1 , wherein the base defines a slot claim 1 , a pair of parallel connecting pieces extend inward from the base above the slot claim 1 , each of the connecting pieces defines a connecting hole claim 1 , a through hole is defined in a side of the first mounting member claim 1 , a first shaft extends through the connecting holes and the through hole of the first mounting member to pivotably attach the first mounting member to the base.4. The mounting apparatus of claim 3 , wherein a pair of parallel flanges extend from the side plate above the pair of the connecting pieces claim 3 , a pivot hole is defined in each of the flanges claim 3 , the second mounting ...

MOUNTING DEVICE FOR FAN

A mounting device includes a base board, two parallel fixing plates extending up from the base board, and a frame for receiving a fan. The fixing plates each define a first vent. Two clamping pieces extend from each fixing plate at opposite sides of the vent toward the other fixing plate. The frame is sandwiched between the clamping pieces and the fixing plates. The frame includes two sidewalls and two end walls. A blocking piece extends up from each sidewall to block the top of the fan. 1. A mounting device for fixing a fan , comprising:a base board;two parallel fixing plates extending up from the base board, each fixing plate defining a first vent, two clamping pieces extending from each fixing plate at opposite sides of the first vent; anda frame for receiving the fan sandwiched among the fixing plates and the clamping pieces, the frame comprising two sidewalls and two end walls each connected between corresponding ends of the sidewalls, a blocking piece extending up from each sidewall to block a top of the fan.2. The mounting device of claim 1 , wherein each end wall defines a second vent aligning with the first vent of each fixing plate claim 1 , an operation portion extends outward from each end wall.3. The mounting device of claim 1 , wherein a supporting portion protrudes from an inner surface of each side wall to support the fan.4. The mounting device of claim 1 , wherein each blocking piece slants inwards and then upwards claim 1 , the inner surface of the topmost part of each blocking piece being chamfered.5. An assembly claim 1 , comprising:a base board;two parallel fixing plates extending up from the base board, each fixing plate defining a first vent, two clamping pieces extending from each fixing plate at opposite sides of the first vent;a fan; anda frame sandwiched among the fixing plates and the clamping pieces, the frame comprising two sidewalls and two end walls each connected between corresponding ends of the sidewalls, the fan accommodated among ...

MOUNTING DEVICE FOR BATTERY

A mounting device for fixing a battery in place includes a board and a fixing member. Two tabs and two plates extend from the board to hold the battery. The fixing member forms a blocking piece on a top surface. A first end of the fixing member extends through one of the plates and then is latched with the blocking piece. A second end of the fixing member extends through the other plate and is formed into a loop to secure the fixing member over the battery. 1. A mounting device for mounting a battery , comprising:a base board to support the battery, the board forming two tabs to abut against opposite sides of the battery and two plates to abut against opposite ends of the battery; anda fixing member to block a top of the battery, the fixing member forming at least one blocking piece on a top surface, a first end of the fixing member to extend through one of the plates and to be fixed to the at least one blocking piece; a second end of the fixing member opposite to the first end to extend through the other plate and to be fixed to the fixing member.2. The mounting device of claim 1 , wherein each plate defines a slot through which a corresponding one of the first end or second end of the fixing member extends.3. The mounting device of claim 1 , wherein the second end of the fixing member is to be glued to the fixing member.4. The mounting device of claim 1 , wherein a plurality of projections is formed around a center of the top surface of the fixing member claim 1 , a plurality of engaging holes is defined in the fixing member between the first end of the fixing member and the projections claim 1 , the projections are engaged in the engaging holes.5. The mounting device of claim 4 , wherein the number of the at least one blocking piece is two claim 4 , the two blocking pieces are positioned at opposite ends of the projections.6. The mounting device of claim 5 , wherein each blocking piece is hollow and substantially bridge-shaped claim 5 , the hollow portion of each ...

MOUNTING DEVICE FOR BATTERY

A mounting device for mounting a battery includes a base board and a fixing member. The board forming two tabs to abut against opposite sides of the battery and two hooks to locate at opposite ends of the battery. The fixing member is configured to block a top of the battery. Opposite ends of the fixing member are configured to connect to the hooks, respectively. 1. A mounting device for mounting a battery , comprising:a base board to support the battery, the base board forming two first tabs to abut against opposite sides of the battery and two hooks located at opposite ends of the battery; anda fixing member to block a top of the battery, opposite ends of the fixing member being configured to be connected to the hooks, respectively.2. The mounting device of claim 1 , wherein the fixing member is substantially wave-shaped and is operable to be deformed.3. The mounting device of claim 2 , wherein two fixing holes are defined in the opposite ends of the fixing member claim 2 , the hooks are engaged in the fixing holes.4. The mounting device of claim 1 , wherein two second tabs extend from the base board to abut against the opposite ends of the battery claim 1 , and the hooks are adjacent to outer sides of the corresponding second tabs.5. A battery assembly claim 1 , comprising:a battery;a base board supporting the battery, the base board forming two first tabs abutting against opposite sides of the battery and two hooks located at opposite ends of the battery; anda fixing member blocking a top of the battery, opposite ends of the fixing member being connected to the hooks, respectively.6. The battery assembly of claim 5 , wherein the fixing member is substantially wave-shaped and is operable to be deformed.7. The battery assembly of claim 6 , wherein two fixing holes are defined in the opposite ends of the fixing member claim 6 , the hooks are engaged in the fixing holes.8. The battery assembly of claim 5 , wherein two second tabs extend from the base board and abut ...

MOUNTING DEVICE FOR BATTERY

A mounting device for mounting a battery includes a base board to support the battery and a fixing member. The base board forms two hooks to abut against opposite sides of the battery, a tab and two protrusions to respectively abut opposite ends of the battery. The fixing member includes a blocking portion to block a top of the battery, two first latching portions to engage with the corresponding hooks, and two second latching portions to be pivotably connected to the protrusions. 1. A mounting device for mounting a battery , comprising:a base board to support the battery, the base board forming two hooks to abut against opposite sides of the battery, a tab and two protrusions to respectively abut opposite ends of the battery; anda fixing member comprising at least one blocking portions to block a top of the battery, two first latching portions to latch with the corresponding hooks, and two second latching portions to be pivotably connected to the protrusions.2. The mounting device of claim 1 , wherein the fixing member is a deformable metal pole.3. The mounting device of claim 1 , wherein each first latching portion is substantially U-shaped.4. The mounting device of claim 1 , wherein a fixing hole is defined in each protrusion claim 1 , each second latching portion is substantially L-shaped claim 1 , a pin extends from each second latching portion to engage in a corresponding one of the fixing holes.5. The mounting device of claim 1 , wherein the at least one blocking portion comprises two first blocking portions extending from top ends of the first latching portions claim 1 , and two second blocking portions each respectively connected between a second latching portion and a corresponding first blocking portion.6. A battery assembly claim 1 , comprising:a base board supporting the battery, the base board forming two hooks abutting against opposite sides of the battery, a tab and two protrusions respectively abuting opposite ends of the battery; anda fixing member ...

SERVER WITH EXPANSION CARD

A server includes a main board, a side panel having an attached female connector, an expansion card, and a lever. The expansion card includes a latching member having a pivot and a male connector. The lever includes an engaging portion defining a slot, and a main body connected to the engaging portion and pivotally connected to the main board. When the lever is rotated in a first direction, the pivot is slid into the slot, causing the engaging portion to engage with the latching member. Further rotating the lever in the first direction, the expansion card is urged to move toward the side panel until the male connector mate with the female connector. When the lever is rotated in a second direction opposite to the first direction, the expansion card is urged to move away from the side panel, causing the male connector to disengage from the female connector. 1. A server comprising:a main board;a side panel connected to one end of the main board, the side panel comprising at least one female connector attached thereto;an expansion card comprising a latching member and at lease one male connector, the latching member comprising a pivot, the at least one male connector and the latching member being positioned at opposite sides of the expansion card, the at least one male connector being to mate with the at least one female connector; anda lever comprising an engaging portion and a main body, the engaging portion defining a slot to receive the pivot, the engaging portion being connected to one end of the main body, the main body being pivotally connected to the main board;wherein when the lever is rotated in a first direction, the engaging portion moves toward the side panel, and the pivot is slid into the slot, which causes the engaging portion to engage with the latching member; when the lever is further rotated in the first direction, the expansion card is urged by the engaging portion to move toward the side panel until the male connector mate with the female connector ...

DEVICE FOR EXITING SCREEN SAVER MODE

A device includes an infrared sensor, a signal processing unit, a first signal conversion unit, a second signal conversion unit, and an interface. The infrared sensor senses infrared rays and outputs a signal to the signal processing unit. The signal processing unit processes the signal, and outputs a processed signal to the first signal conversion unit. The first signal conversion unit transforms the processed signal into a keyboard signal, and outputs the keyboard signal to the second signal conversion unit. The second signal conversion unit transforms the keyboard signal into an interface signal according to type of the interface, and outputs the interface signal to the interface. The interface outputs the interface signal to a computer connected to the interface, to cause the computer to exit a screen saver mode. 1. A device , comprising:an infrared sensor to sensor infrared rays and output a signal according to the detection;a signal processing unit connected to the infrared sensor to receive the signal, wherein the signal processing unit processes the signal and outputs a processed signal;a first signal conversion unit connected to the signal processing unit to receive the processed signal, wherein the first signal conversion unit transforms the processed signal into a keyboard signal, and outputs the keyboard signal;a second signal conversion unit connected to the first signal conversion unit to receive the keyboard signal, wherein the second signal conversion unit transforms the keyboard signal into an interface signal, and outputs the interface signal; andan interface connected to the second signal conversion unit to receive the interface signal, wherein the interface outputs the interface signal to a computer connected to the interface, to make the computer exit a screen saver mode.2. The device of claim 1 , further comprising a main body and a cable claim 1 , wherein the main body comprises a space to receive the signal processing unit claim 1 , the first ...

OVERVOLTAGE PROTECTION CIRCUIT

A protection circuit that protects a load charged by a power supply. The protection circuit includes a reference voltage set circuit, a sampling circuit, a switch, and a comparator. The reference voltage set circuit provides a reference voltage. The sampling circuit is electrically connected to the power supply and provides a sampling voltage based on a charge voltage output from the power supply to the load. The switch is electrically connected between the power supply and the load. The comparator includes a non-inverting input terminal electrically connected to the reference voltage set circuit, an inverting input terminal electrically connected to the sampling circuit, and an output terminal electrically connected to the switch. The comparator compares the sampling voltage with the reference voltage, and controls the switch to turn on or off according to the comparison. 1. A overvoltage protection circuit that protects a load charged by a power supply , the protection circuit comprising:a reference voltage set circuit providing a reference voltage based on the load;a sampling circuit electrically connected to the power supply, the sampling circuit providing a sampling voltage based on a charge voltage output from the power supply to the load;a switch electrically connected between the power supply and the load; anda comparator comprising a non-inverting input terminal electrically connected to the reference voltage set circuit, an inverting input terminal electrically connected to the sampling circuit, and an output terminal electrically connected to the switch; the comparator comparing the sampling voltage with the reference voltage, and controlling the switch to turn on or off according to the comparison.2. The overvoltage protection circuit of claim 1 , wherein the switch is a metal-oxide-semiconductor field-effect transistor (MOSFET) claim 1 , a gate of the switch electrically connected to the output terminal; a source of the switch electrically connected to ...

ELECTRONIC DEVICE WITH PIVOTABLE ARM

An exemplary electronic device includes a case, an inner body and a pivotable arm pivotally connected on the inner body by a pivot. The case defines an opening at a first lateral side thereof and a latching hole at a second lateral side thereof adjacent to the opening. The inner body is inserted in the case through the opening. The pivotable arm includes a frame engaged in the latching hole of the case, a latching member pivotally connected to the frame by the pivot, and a resilient member. The latching member includes an inner end and an outer end at opposite sides of the pivot. The outer end of the latching member is engaged in the latching hole. The resilient member abuts against the inner end of the latching member such that the inner end of the latching member biases the inner body. 1. An electronic device , comprising:a case defining a through hole at a top side thereof, an opening at a first lateral side thereof adjacent to the through hole, and a latching hole at a second lateral side thereof, the first lateral side being adjacent to the second lateral side;a body received in the case through the opening and having a pivot extending up therefrom;a locking post extending into the case via the through hole; anda pivotable arm pivotally connected on the body by the pivot, the pivotable arm comprising a frame, a latching member pivotally connected to one end of the frame by the pivot, a locking member pivotally connected to the other end of the frame, and a resilient member, the frame comprising a latching tab at the one end thereof, the latching portion received in the latching hole of the case, the latching member comprising an inner end and an outer end at opposite sides of the pivot, the outer end of the latching member received in the latching hole, the resilient member abutting against the inner end of the latching member such that the inner end of the latching member biases the body, and the locking member comprising a hook clasping the locking post.2. ...

MOUNTING APPARATUS FOR BACKPLANE

A mounting apparatus for mounting a hard disk drive backplane to a side of a bracket in a chassis includes a first mounting member, a second mounting member, a pivot member, and a locking member. The bottom and opposite ends of the backplane are clipped to the bracket. The second mounting member is fixed to a top side of the backplane and is locked to a top plate of the bracket. The first mounting member is fixed to a bottom side of the backplane. The first mounting member includes an engaging portion. The locking portion is fixed to the chassis. A first end of the pivot member is pivotably mounted to the chassis. A second end of the pivot member is locked to the locking member. A pressing portion extends down from a middle of the pivot member to press the engaging portion on the chassis. 1. A mounting apparatus for mounting a hard disk drive backplane in a chassis , comprising:a hard disk drive bracket comprising a top plate, a first end plate, a second end plate, and a bottom plate mounted on the chassis, wherein a locking slot is defined in a rear side of the top plate, a flange extends perpendicularly from a rear end of the first end plate, two raised portions protrude from an inner surface of the rear end of the first end plate adjacent to the flange, a clipping portion is formed from a rear end of the second end plate, a plurality of tabs and a plurality of mounting pieces respectively near the tabs protrude from a rear side of the bottom plate;a first mounting member fixed to a bottom side of the backplane, wherein an engaging portion extends from a bottom of the first mounting member;a second mounting member fixed to a top side of the backplane, wherein a locking piece extends down from a front side of the second mounting member;a locking member fixed to the chassis; anda pivot member with a first end pivotably connected to the chassis, wherein a pressing portion extends down from a middle of the pivot member;wherein the backplane is arranged on the chassis ...

MOTOR CONTROL CIRCUIT AND KEYBOARD ASSEMBLY HAVING SAME

A motor control circuit for controlling rotation directions of a motor includes a primary power supply, a voltage monitor unit, a motor driving chip, a controller and a backup power supply. The backup power supply is constantly charged by the primary power supply when the primary power supply is in service. The voltage monitor unit is electronically connected to the primary power supply, and is configured for determining whether the primary power supply is in or out of service. The controller controls the motor driving chip to drive the motor to rotate in a first direction when the primary power supply is in service, and alternatively controlling the motor driving chip to drive the motor to rotate in a second direction reverse to the first direction when the primary power supply is out of service. 1. A motor control circuit for controlling rotation directions of a motor , comprising:a primary power supply;a backup power supply charged by the primary power supply when the primary power supply is in service;a voltage monitor unit electronically connected to the primary power supply, and configured for determining whether the primary power supply is in or out of service;a motor driving chip electronically connected to the motor; anda controller controlling the motor to obtain power supply from the primary power supply and the motor driving chip to drive the motor to rotate in a first direction when the primary power supply is in service, and alternatively controlling the motor to obtain power supply from the backup power supply and the motor driving chip to drive the motor to rotate in a second direction reverse to the first direction when the primary power supply is out of service.2. The motor control circuit of claim 1 , wherein the voltage monitor unit comprises a voltage monitor chip claim 1 , which comprises a voltage input pin claim 1 , a detecting pin electronically connected to the primary power supply claim 1 , and a first output pin claim 1 , the voltage ...

Motor control circuit and keyboard assembly having same

An exemplary motor control circuit for controlling a motor includes a motor driving chip, a sensing unit, and a controller. The motor driving chip motor driving chip is electronically connected to the motor. The sensing unit includes a proximity sensor, the proximity sensor detects whether an external object is proximate to the proximity sensor. The controller is electronically connected to the motor driving chip and the sensing unit, the controller controls the motor driving chip to drive the motor to rotate in a first direction when an external object is detected, and controls the motor driving chip to drive the motor to rotate in a second direction reverse to the first direction when no external object is detected for a predetermined period of time.

FIXING MECHANISM FOR FIXING EXPANSION CARDS AND SERVER USING SAME

A fixing mechanism for fixing expansion cards in place includes a fixing assembly, a clamping element opposite to the fixing assembly, and a connection element. A side of the clamping element away from the fixing assembly defines a recess for receiving the expansion card. The connection element is hinged to the fixing assembly and the clamping element. When the connection element is rotated relative to the fixing assembly and the clamping element, the clamping element is moved towards or away from the fixing assembly to adjust a distance between the fixing assembly and the clamping element. 1. A fixing mechanism for fixing expansion cards , the fixing mechanism comprising:a fixing assembly;a clamping element opposite to the fixing assembly, a side of the clamping element away from the fixing assembly defining a recess for receiving the expansion card; anda connection element hinged to the fixing assembly and the clamping element;wherein when the connection element is rotated relative to the fixing assembly and the clamping element, the clamping element is moved towards or away from the fixing assembly to adjust a distance between the fixing assembly and the clamping element.2. The fixing mechanism as claimed in claim 1 , wherein the fixing mechanism further comprises a first shaft and a second shaft claim 1 , the connection element is hinged to the fixing assembly through the first shaft and is hinged to the clamping element through the second shaft.3. The fixing mechanism as claimed in claim 2 , wherein the connection element comprises two opposite protrusions located at one side of the connection element and two opposite fixing plates located at an opposite side of the connection element claim 2 , each protrusion defines a first hinge hole; each fixing plate defines a second hinge hole.4. The fixing mechanism as claimed in claim 3 , wherein the fixing assembly defines two coaxial through holes claim 3 , the first shaft is inserted into the through holes and the ...

ELECTRONIC DEVICE WITH MULTI-WINDOW DISPLAYING FUNCTION AND MULTI-WINDOW DISPLAYING METHOD THEREOF

An electronic device with multi-window displaying function includes an input unit, a storage unit, a display unit, and a processing unit. The processing unit includes an input responding module, a multi-window controlling module, and a display driving module. In a multi-window reading mode, the input responding module responds to a multi-window displaying command from the input unit; the multi-window controlling module controls the display unit to display multi sub-windows in a size corresponding to the number of windows to be displayed in each multi-window mode, and drives the display unit to display a first file on a first sub-window, the display driving module drives the display unit to display another file on other sub-windows according to user input. 1. An electronic device comprising:an input unit configured for receiving input operations by a user and generating input signals associated therewith, the input signals including file opening signals and multi-window displaying signals;a storage unit configured for storing electronic files;a display unit configured for displaying content of the electronic files stored in the storage unit;a processing unit comprising an input responding module, a multi-window controlling module, and a display driving module;wherein in a normal reading mode, the input responding module is configured for responding to a file opening signal generated by the input unit in a normal reading mode;the display driving module is configured for driving the display unit to display the content of a first file chosen by a user in full screen;in a multi-window reading mode, the input responding module is configured for responding to a multi-window displaying signal generated by the input unit; the multi-window controlling module is configured for controlling the display unit to display multi sub-windows in a size which depends on the number of windows to be displayed, and controlling the display unit to display the first file on a first sub- ...

CIRCUIT FOR CLEARING DATA STORED IN COMPLEMENTARY METAL-OXIDE-SEMICONDUCTOR

An exemplary circuit for clearing data stored in a complementary metal-oxide-semiconductor (CMOS) includes a power circuit and a button circuit. The power circuit supplies power for the CMOS. The button circuit is configured to clear data stored in the CMOS, and includes a switch and an electronic switch element. A first terminal of the switch is grounded, and a second terminal of the switch is coupled to a first terminal of the electronic switch element. A second terminal of the electronic switch element is grounded. A third terminal of the electronic switch element is coupled to the CMOS. When the switch is closed, the second terminal of the electronic switch element is connected to the third terminal of the electronic switch element, and the data stored in the CMOS is cleared. 1. A circuit for clearing data stored in a complementary metal-oxide-semiconductor (CMOS) , comprising:a power circuit supplying power for the CMOS; anda button circuit comprising a first diode, a first resistor, a first electronic switch element, and a switch;wherein a first terminal of the switch is grounded, a second terminal of the switch is coupled to a cathode of the first diode through the first resistor, and coupled to a first terminal of the first electronic switch element, an anode of the first diode is coupled to the power circuit, a second terminal of the first electronic switch element is grounded, and a third terminal of the first electronic switch element is coupled to the CMOS; andwherein the second terminal of the first electronic switch element is connected to the third terminal of the first electronic switch element in response to a voltage level of the first terminal of the first electronic switch element being low, and the second terminal of the first electronic switch element is disconnected from the third terminal of the first electronic switch element in response to the voltage level of the first terminal of the first electronic switch element being high.2. The ...

INDICATOR LIGHT CONTROL CIRCUIT

An indicator light control circuit for controlling a single indicator light to indicate a high or low link speed of a network connection includes a pulse signal generating circuit, a bias circuit having a digital potentiometer, and a controller. The pulse signal generating circuit generates a pulse signal. The digital potentiometer is electronically connected to the pulse signal generating circuit and the controller. The controller adjusts the effective resistance of the digital potentiometer connected to the pulse signal generating circuit according to different link speeds being experienced in the network connection, to adjust a duty cycle of the pulse signal, thereby changing the on-time and off-time of the indicator light. 1. An indicator light control circuit for controlling an indicator light , comprising:a pulse signal generating circuit for generating a pulse signal;a bias circuit comprising a digital potentiometer electronically connected to the pulse signal generating circuit;a controller electronically connected to the digital potentiometer, the controller adjusting an effective resistance of the digital potentiometer connected to the pulse signal generating circuit, to adjust a duty cycle of the pulse signal correspondingly, thereby changing the on-time and off-time of the indicator light.2. The indicator light control circuit as claimed in claim 1 , further comprising a power supply claim 1 , wherein the pulse signal generating circuit comprising a comparator claim 1 , a integral resistor claim 1 , a integral capacitor and a feedback resistor claim 1 , the comparator comprising an inverting input terminal claim 1 , a non-inverting input terminal claim 1 , and an output terminal claim 1 , the integral resistor is electronically connected between the output terminal and the inverting input terminal of the comparator claim 1 , the integral capacitor is electronically connected between ground and a node between the integral resistor and the inverting input ...

OVERVOLTAGE PROTECTION CIRCUIT

An overvoltage protection circuit includes a power device for outputting a plurality of first powers, a plurality of VRMs for respectively receiving the plurality of first powers, a plurality of voltage dividing circuits, a reference power supply for outputting a reference voltage, and a comparison circuit having a comparator. Each VRM converts a corresponding first power to a regulated second power. The plurality of voltage dividing circuits respectively divides voltages of the second powers, each voltage dividing circuit outputs a divided voltage. The comparator compares a combination of the divided voltages with the reference voltage, and when an overvoltage occurs in at least one of the second powers, the comparator outputs a control signal via the output terminal to the power device to control the power device to shut down all of the first powers. 1. An overvoltage protection circuit , comprising:a power device configured for outputting a plurality of first powers;a plurality of voltage regulator modules (VRMs) configured for respectively receiving the plurality of first powers, each VRM regulating a corresponding first power and outputting a regulated second power;a plurality of voltage dividing circuits configured for respectively dividing voltages of the second powers, each voltage dividing circuit outputting a divided voltage;a reference power supply configured for outputting a reference voltage; anda comparison circuit comprising a comparator, a first input terminal of the comparator electronically connected to the reference power supply to obtain the reference voltage, a second input terminal of the comparator electronically connected to a common output node of the voltage dividing circuits, and an output terminal of the comparator electronically connected to the power device;wherein the comparator compares a voltage of the common output node with the reference voltage; when an overvoltage occurs in at least one of the second powers, the comparator ...

POWER STRIP WITH HEAT PROTECTION FUNCTION

A power strip includes a plug, a main body, a thermo-sensor output unit, a comparison control unit, and a switch unit. The main body includes a number of electrical sockets. The thermo-senor output unit senses a temperature of the cable. When the sensed temperature is greater than a predetermined temperature, the thermo-sensor output unit outputs a voltage signal to the comparison control unit to make the comparison control unit turn off the switch unit to disconnect the plug from the sockets. 1. A power strip comprising:a plug to be connected to an alternating current (AC) power source to receive an AC voltage;a main body comprising a plurality of sockets connected to the plug through a cable to receive the AC voltage from the plug; and a conversion circuit connected to the plug to receive the AC voltage and convert the AC voltage into a direct current (DC) voltage, the conversion circuit comprising an output terminal to output the DC voltage; and', a switch unit connected to the cable between the conversion circuit and the sockets;', 'a thermo-sensor output unit to sense a temperature of the cable; and', 'a comparison control unit connected between the thermo-sensor output unit and the switch unit;, 'a control circuit comprising], 'a heat protection circuit comprisingwherein when the sensed temperature of the cable is greater than a predetermined temperature, the thermo-sensor output unit outputs a first voltage to the comparison control unit, the comparison control unit outputs a first control signal to turn off the switch unit to disconnect the plug from the sockets.2. The power strip of claim 1 , wherein when the sensed temperature of the cable is lower than the predetermined temperature claim 1 , the thermo-sense output unit outputs a second voltage to the comparison control unit claim 1 , the comparison control unit outputs a second control signal to turn on the switch unit to connect the plug to the sockets.3. The power strip of claim 1 , wherein the thermo- ...