Electric door lock system

Abstract

An electric door lock system is disclosed which comprises an electric actuator which moves an output member in first and second directions selectively, a door locking mechanism which moves a latch plate of a door lock device proper from its half-latched position to its full-latched position when the output member is moved in the first direction, a lock cancelling mechanism which cancels the locked condition of the latch plate when the output member is moved in the second direction, a lock cancelling switch means incorporated with an inside or outside handle of the door, which operates in response to manipulation of the handle, a locking and unlocking switch means which operates when locking and unlocking of the door are required, a half-latched condition sensor which senses that the latch plate has come to the half-latched position from its open position, and a control means which functions so that when, with the door lock device proper being in its unlocked condition, the lock cancelling switch means is manipulated, the output member is moved in the second direction thereby to allow the latch plate to pivot toward its open position and when the half-latched condition sensor senses the reaching of the door to the half-latched position, the output member is moved in the first direction thereby to cause the latch plate from the half-latched position to the full-latched position.