US Patent 11046379 Anti-rapid drop bicycle rack and its anti-rapid drop joint

An anti-rapid drop bicycle rack and its joint in which the joint provides an anti-rapid drop function. The joint includes a holder block having two upright plates and a guiding hole on each upright plate, and a swing assembly including a hollow body, a mount, an actuating rod, a handle, an interference member and a spring. The bottom edge of each guiding hole defines a standing positioning groove at the front side, an inclined positioning groove at the rear side, and an intermediate positioning groove between the standing positioning groove and the inclined positioning groove. The interference member is elastically abutted against the groove bottom of one of the standing positioning groove, the inclined positioning groove and the intermediate positioning groove of each of the two guiding holes.