Patent ID: 11109681

Abstract:
A self-locking mechanism includes a frame (1), a transmission member (3), a rotating member (2), and a locking rod (4), forming a four-bar linkage mechanism. A supporting member (6) is movable relative to the frame (1). The rotating member (2) has an upper end rotatably connected with the supporting member (6), a lower end provided with a guide slot (22), and a middle portion therebetween. The transmission member (3) has two ends rotatably connected with the frame (1) and the middle portion respectively. The locking rod (4) has an upper end rotatably connected with the frame (1), and a lower end provided with a guide rod (41) movable in the guide slot. The locking rod (4) is rotatable between multiple positions. When the locking rod (4) is in a locking position, the guide rod (41) abuts against the guide slot to prevent the supporting member (6) from moving upward.