US 4,762,348 AGranted

Electric door lock system

AssigneeOhi Seisakusho Co., Ltd.

InventorMasaharu Matsumoto

Life of this patent

Estimating the term…

Loading patent…

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.

An electric door lock system comprising:

a door lock device including a latch plate movable between a half-latched position, a full-latched position, and an open position and engageable with a striker and a pawl plate engageable with said latch plate to lock the same;
an output member means which is movable in first and second directions;
an actuator means having a first actuation means and a second actuation means for moving the output member means in said first and second directions, selectively;
a door locking mechanism means which moves said latch plate from said half-latched position to said full-latched position when said output member is moved in said first direction;
a lock releasing mechanism means which cancels the locked engagement of said pawl plate with said latch plate when said output member means is moved in said second direction;
a lock releasing switch means which actuates the lock releasing mechanism means and operates when opening of the door is required;
a locking and unlocking switch means which actuates the door locking mechanism means and operates when locking and unlocking of the door are required;
a half-latched condition sensor means which senses the reaching of said latch plate to said half-latched position from said open position;
and
a control means for controlling the operation of said door lock system and includes a locked and unlocked condition memory means which memorizes either the locked condition of the door or the unlocked condition of the same, a control selection means which makes said lock releasing switch means operative when said memory means memorizes said unlocked condition of the door and makes said lock releasing switch means inoperative when said memory means memorizes said locked condition of the door, the first actuation means which moves said output member means in said second direction when said control selection means makes said lock releasing switch means operative and the lock releasing switch means is manipulated, and the second actuation means which moves said output member means in said first direction when the half-latched condition sensor senses reaching of the door to the half-latched position.

7 more elements

Abstract

Claims15