Abstract: A self-locking plug includes a main body, a plug bush seat arranged in the main body for positioning a plug bush, at least one locking tab, and a linkage. The self-locking plug further includes a key mechanism arranged in the main body. The key mechanism includes a pressing portion and a driving portion which are respectively arranged at two ends of the key mechanism. The driving portion is associated with one end of the linkage, and is configured to drive the linkage to reciprocate in an axial direction of the main body to switch the locking tab between a releasing state and a locking state.

Abstract: A self-locking plug includes a main body, a plug bush seat arranged in the main body for positioning a plug bush, at least one locking tab, and a linkage. The self-locking plug further includes a key mechanism arranged in the main body. The key mechanism includes a pressing portion and a driving portion which are respectively arranged at two ends of the key mechanism. The driving portion is associated with one end of the linkage, and is configured to drive the linkage to reciprocate in an axial direction of the main body to switch the locking tab between a releasing state and a locking state.