The utility model discloses a kind of flap mechanisms, including box, box cover, baffle, hinge, sheet
metal support,
spring steel wire and
pulley;Box top is equipped with box cover, baffle is fixedly connected in box outer wall one end, hinge is located at baffle both ends, sheet
metal support is fixedly installed in baffle one end,
spring steel wire rotation is connected in sheet
metal support lower side both ends,
pulley rotation is connected in one end of
spring steel wire.The utility model is compared with prior art's
advantage lies in: the utility model utilizes the spring steel wire and the elasticity and torsional force of repeatedly contact cooperation between hinge to promote hinge, when hinge moves back, hinge profile promotes
pulley movement, box cover is in open state at this time, the angle of opening and closing is locked by limiting screw and
cam limiting boss between pulley and hinge simultaneously, it is convenient to open and close box cover stably, and the present mechanism does not need
gas spring, service life is long, the stability when box door cover opens and closes is improved.