VEHICLE DOOR LOCKING SYSTEM

摘要

PCT No. PCT/GB86/00332 Sec. 371 Date Mar. 5, 1987 Sec. 102(e) Date Mar. 5, 1987 PCT Filed Jun. 10, 1986 PCT Pub. No. WO86/07405 PCT Pub. Date Dec. 18, 1986.Central locking system for vehicle doors includes an electric actuator (13) whose motor (21) drives a snail cam (23) for shifting a lock operating lever (25) between locked and unlocked positions. The lever is held at the respective position with the cam at the extremes of its travel but is free to be operated manually e.g. by a sill button of the associated door, when the cam is at mid travel. A spring (35) is arranged to urge the cam in one direction only from the unlocked extreme to mid travel but does not affect the cam at the locked extreme enabling the door to be dead-locked using the actuator i.e. so that it remains locked until the actuator is operated to shift the cam away from that extreme.