| 摘要 |
A door lock system for an automotive door, which includes a door lock driving device for mechanically locking or unlocking a door lock. The door lock can be, however, manually operated with a small force, because the door lock is operatively disconnected from an electric motor of the door lock driving device. The door lock driving device has a reversible electric motor, a sun gear fixed to an output shaft of the electric motor, a pair of swing levers rotatably supported by the output shaft, a planetary gear rotatably supported by the swing levers and engaged with the sun gear, and wave washers interposed between the swing levers and side surfaces of the planetary gear, so that when the electric motor is rotated, the planetary gear is rotated around the output shaft of the electric motor. The door lock driving device further includes a driven gear and a driven shaft which are operatively connected with each other by means of a torsion bar, so that a rotational force of the driven gear is transmitted to the driven shaft by twisting the torsion bar. When the planetary gear is brought into engagement with the drive gear, the rotational force of the electric motor is transmitted to the driven shaft through the sun gear, the planetary gear, the driven gear and the torsion bar. When the rotation of the electric motor is stopped, the driven gear is rotated in a reverse direction by the spring back action of the torsion bar, so that the planetary gear is brought out of engagement with the driven gear to operatively disconnect the driven shaft from the electric motor.
|
