Lock mechanism with state indication function

The invention relates to a lock mechanism with a state indication function. The lock mechanism comprises a shell, a cover and an indicator, and the indicator comprises an active indicator and a passive indicator which are circumferentially arranged along a central axis. The driving indicator is provided with a cam matching surface extending in the circumferential direction of the central axis and a stopping end located at the end, corresponding to a pivoting center of the driving indicator, of the cam matching surface, and a radial side protruding part slides along the cam matching surface so that the driving indicator can pivot around a protrusion to leave the central axis of the cover. A radial side convex part pushes and presses the stopping end of the active indicator and promotes the active indicator to pivot around the protrusion to a recovery position where an indicating part is covered by the cover, and the passive indicator is in linkage connection with the active indicator through a tooth transmissi