But seat retractable chair

The utility model provides a but seat retractable chair, includes the seat body, is provided with convex track in the below of the left and right sides of seat body support frame, and convex track one end is fixed in combination department of support frame with the back, and the other end is fixed in combination department of support frame with the seat supporting leg, convex track open flutedly, be provided with the back shaft between the recess of both sides, be fixed with the seat on the back shaft, the bracing piece is installed to both sides seat supporting leg inboard, when spectator just sat on the chair, the seat was transversely placed to support by the bracing piece, when spectator passed in and out, the seat overturn around fixed back shaft together with it under the action of gravity backward, then utilizes the health to lean on on the seat, and the seat slides backward, and the space is abdicated the descendant that finishes and is move along the seat at self gravity orbital ...