Patent ID: 8375753

Claim:
An electromechanical lock, comprising: a latch solenoid driven mechanism comprising a plunger axially displaceable, by a solenoid actuated by an electrical command signal, the displacement being between retracted and extended states and the plunger being associated with a first urging arrangement that biases the plunger in a first axial direction from the retracted to the extended states; and a locking mechanism, comprising: a lock actuation member movable between first and second states for locking and unlocking the lock, respectively, a second urging arrangement operative to bias said lock actuation member to move to the second state, and a third urging arrangement operative to bias the lock actuation member to move from the second to the first state; the plunger being operatively associated with the locking mechanism to cause said lock actuation member to move from the first to the second state for shifting the lock to an unlocked state upon displacement of the plunger in the first direction, and to permit movement of the lock actuation member, induced by the third urging arrangement, from the second to the first state for shifting the lock to a locked state, upon displacement of the plunger from the extended to the retracted state, and wherein the biasing force of the first urging arrangement in a tensioned state is greater than the biasing force of the second urging arrangement, and the biasing force of the second urging arrangement in its tensioned state is greater than the biasing force of the third urging arrangement.