Door lock actuator

Abstract

A door lock actuator enabling a motor to not be electrified in the state of mechanically limiting actions is characterized in that a cam component (4) is equipped with a first operation part (13) and a second operation part (14), the first operation part (13) is rotated further at a locking complete angle to enable a switch component (7) to swing towards an unlocking drive region in which a movable contact (20) is contacted with a first fixed contact (27) and a second fixed contact (28) and is not contacted with a third fixed contact (29), and the second operation part (14) is rotated further towards the unlocking direction at a unlocking complete angle to enable the switch component (7) to swing towards a locking drive region in which the movable contact (20) is abutted against the first fixed contact (27) and the second fixed contact (28) and is not abutted against the third fixed contact (29). By swing a locking component (6) to the locking position and the unlocking position, the switch component (7) swings towards a transaction region in which the movable contact (20) is contacted with all the fixed contacts (27, 28, 29).

Description

technical field [0001] The present invention relates to door lock actuators. Background technique [0002] The vehicle door lock actuator rotates a lock lever of a door lock device disposed on a door of the vehicle to a locked position and an unlocked position by driving a motor. [0003] In the conventional door lock actuators described in Patent Documents 1 and 2, when a lock lever is driven, when a predetermined time elapses after energization of the motor, the timer stops energization of the motor. In order to reliably move the lock lever to the locked position or the unlocked position, the energization time to the motor needs to be set slightly longer with some allowance. [0004] However, when the lock lever reaches the lock position or the unlock position, the swing of the lock lever is mechanically restricted, so the motor cannot be rotated even though it is energized, and the motor generates a buzzing sound. In addition, if the motor is energized in the locked or ...

AI Technical Summary

Problems solved by technology

[0004] However, when the lock lever reaches the locked position or the unlocked position, the swing of the lock lever is mechanically restricted, so the motor cannot be rotated even though it is energized, and the motor produces a buzzing sound.

Also, if the motor is energized in the locked or unlocked position, the motor will burn out in the worst case

[0005] Therefore, in the existing door lock actuator, since it is necessary to install a protection element such as a PTC thermistor or a protection circuit to prevent the motor from burning out, it will lead to an increase in cost.

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