A lock assembly comprising a lock device, with the lock device including:
- a frame including an installation space;
- a tappet mechanism mounted in the installation space of the frame, wherein the tappet mechanism includes a tappet movable between a front position and a rear position, and wherein the tappet is biased to the front position;
- a driving member pivotably mounted in the installation space of the frame and interlocked with the tappet, wherein the driving member includes a first guiding groove, and wherein the driving member is actuated to pivot when the tappet moves between the front position and the rear position;
- a follower member pivotably mounted in the installation space of the frame and including a guiding slot, wherein the guiding slot includes a movement portion and a positioning portion intersecting with the movement portion;
- a return spring mounted between the driving member and the follower member, wherein the return spring biases the follower member;
- an unlocking member pivotably mounted in the installation space of the frame and including a movement groove, wherein the movement groove includes a pressing side, and wherein the unlocking member is movable between a pressing position and a non-pressing position;
- a follower pin movably received in the first guiding groove, the guiding slot, and movement groove, wherein the follower pin is movable to a first position in the positioning portion or a second position in the movement portion, wherein the follower pin is in the first position when the unlocking member is in the non-pressing position, wherein the follower pin is in the second position when the unlocking member is in the pressing position, wherein the driving member and the follower member pivot jointly when the follower pin is in the first position, and wherein the follower member is independently pivotable relative to the driving member when the follower pin is in the second position;
- a locking unit received in the installation space of the frame and interlocked with the follower member, wherein the locking unit includes an engaging member, wherein the engaging member moves between an engagement position and a disengagement position when the follower member pivots, wherein the engaging member is in the disengagement position when the tappet is in the front position, and wherein the engaging member is in the engagement position when the tappet is in the rear position;
- a first driver mounted in the installation space of the frame, wherein the first driver interlocks with and is jointly moveable with the unlocking member between the pressing position and the non-pressing position;
- a lock head selectively extended into the tappet mechanism, wherein the lock head includes an engaging groove,
- wherein when the lock head is outside of the tappet mechanism, the tappet is in the front position, and the follower pin is in the first position,
- wherein when the lock head extends into the tappet mechanism and moves the tappet to the rear position, the engaging groove of the lock head engages with the engaging member of the locking unit, the follower pin is in the first position, and the lock head is in a locked state, and
- wherein when the follower pin is moved to the second position while the lock head is in the locked state, the return spring biases the follower member to independently pivot relative to the driving member to move the engaging member from the engagement position to the disengagement position, the tappet moves from the rear position to the front position, permitting the lock head to disengage from the tappet mechanism.