US 6,648,380 B1Granted

Door lock, especially for motor vehicles

AssigneeHuf Hülsbeck & Fürst GmbH & Co. KG

InventorsPiotr Szablewski, Erik Kiehl

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Abstract

A rotary latch (11) of a door lock is retained in a detent position by a spring-mounted retainer (20). A motor-driven working member (47) is provided for lifting said retainer (20). An energy-storing device (30) subjects a storing member (22) to a force and hereby serves to lift the retainer (20) out of its detent position in the rotary latch (11). To this end, the storing member (22) has a control surface against which the working member (47) travels in a first motor phase in order to load the energy-storing device (30). A counter-control surface (29) against which the working member (47) travels when lifting the retainer (20) in a staggered second motor phase is also provided. The aim of the invention is to provide a reliable door lock which will also function in the event of an accident. To this end, both the control surface (23) and the counter-control surface (29) are located on the storing member (22). The additional force required for lifting the retainer (20) acts on said retainer indirectly through the storing member (22). As a result, the quantities of energy produced one after the other in the two motor drive phases can be transmitted spontaneously from the shoulder (32) of the storing member (22) to the counter-shoulder (33) of the retainer (20).

A door lock for a door of a motor vehicle, the door lock comprising:

a rotary latch (11) having a main catch (17);
a locking member (10) configured to be introduced into the rotary latch (11) during closing of a door of a motor vehicle and to pivot the rotary latch (11) from an open position into at least one locking position;
a spring-loaded (28) retainer (20) configured to engage in one of the at least one locking positions the main catch (17), wherein the retainer (20) has a counter shoulder (33);
a working member (47) configured to indirectly lift the retainer (20);
a motor (40) acting on the working member (47);
a storing member (22) having a control surface (23) and a counter control surface (29);
a force storage device (30) loading the storing member (22), wherein the storing member (22) has a shoulder (32) configured to contact the counter shoulder (33) for lifting the retainer (20) away from the main catch (17) by discharging the force storage device (30);
wherein the motor (40) has a first motor drive phase for moving the working member (47) in order to charge the force storage device (30);
wherein the motor (40) has a second motor drive phase for moving the working member (47) against the counter control surface (29) during lifting of the retainer (20) out of the main catch (17), wherein the second motor drive phase is time-delayed relative to the first motor drive phase;
wherein, in a crash situation, forces of the motor (40) applied successively in the first and second motor drive phases onto storage device are used for lifting the retainer (20);
wherein, in a disturbance situation, an additionally required force of the motor for lifting the retainer (20) is indirectly transmitted via the storing member (22) onto the retainer (20) so that the forces successively applied in the first and second motor drive phases are transmitted simultaneously from the shoulder (32) of the storing member (22) onto the counter shoulder (33) of the retainer (20).

8 more elements

Abstract

Claims16