Cam latch
A latch for capturing a striker includes a latch cam, a trigger, a drive cam, a motor coupled to the drive cam, and a switch coupled to the motor. The latch cam is biased to rotate toward an open position and configured to capture the striker in a closed position. The drive cam uses at least one cam surface to contact the trigger, and the switch permits actuation of the motor to rotate the drive cam when sensing the trigger or the drive cam, thereby rotating the drive cam to urge the trigger toward an unlocked position, disengage the trigger from the latch cam, and allow the latch cam to rotate from the closed position toward the open position. A system incorporating the latch and method of capturing a striker is also provided.
1. A method for releasing a striker from a latch cam of a latch, the method comprising:
sensing the position of a trigger or a drive cam of the latch with a single switch;
actuating a motor to rotate the drive cam of the latch while the trigger or the drive cam is sensed by the switch and the switch is in a closed state;
rotating the trigger of the latch from a locked position toward an unlocked position by rotation of the drive cam;
disengaging the trigger from the latch cam of the latch; and
allowing the latch cam of the latch to rotate from a closed position toward an open position, thereby releasing the striker from the latch cam of the latch,
wherein in the closed state of the switch and upon the actuation of the motor, the motor rotates the drive cam, thereby urging the trigger from the locked position toward the unlocked position, disengaging the trigger from the latch cam and from the switch with the drive cam engaging the switch to maintain the closed state, thus allowing the latch cam to rotate from the closed position toward the open position.
2. The method of claim 1 , wherein the sensing step includes contacting the switch with the trigger or the drive cam.
3. The method of claim 1 , wherein the step of allowing the latch cam to rotate includes biasing the latch cam toward the open position.
4. The method of claim 3 , further comprising biasing the trigger toward the locked position of the trigger using a spring.
5. The method of claim 1 , further comprising sensing when the striker is near the latch.