Screen cloth hoist mechanism

The utility model provides a screen cloth hoist mechanism, including screen cloth, promotion piece and fixed supporting seat, be provided with the lift bolt on the supporting seat, the lift bolt lower extreme supports on the supporting seat, it establishes on the lift bolt to promote a cover to with lift bolt screw -thread fit, the screen cloth is connected through the fastener with the promotion piece. The supporting seat top is provided with the guard plate, set up the handle hole that corresponds with lift bolt upper end on the guard plate. The utility model discloses a lift bolt with promote an upper and lower regulation that realizes the screen cloth, adjustable cylinder -concave clearance more can satisfy the operating mode of various complicacies. The guard plate can and promote and guard action that the supporting seat isotructure played the lift bolt.