Abstract: A drive mechanism for an automatic rear-view mirror assembly of a motor-driven folding type. The driving mechanism includes an electric motor fixed on a mirror housing. The mirror housing is supported rotatably on a shaft fixed to a mirror base which is secured to a vehicle body in such a manner that it can be turned between a normal and retracted position by the drive mechanism. The drive mechanism includes a motor and a gear reducer composed of a plurality of planetary gear units. The planetary gear units include a sun gear connected to an output of the motor, and a group of transmission gears including a first spur gear mounted fixedly on the shaft and a second spur gear connected to an output shaft and meshed with the first spur gear. The reduction gear includes a first casing which houses the planetary gear units on the same shaft and has a ring gear common to these planetary gear units, provided on its inner circumferential surface.

Abstract: A device for driving a movable member in vehicle comprises a driving motor provided to be rotated in s predetermined direction, a reduction gear train for decelerating the rotating motion of the driving motor, and crank mechanism for transmitting the rotation of the motor to an output shaft to be coupled with a driven member and a casing for enclosing the motor, reduction gear train and the crank mechanism.Adjacent two gears in the reduction gear train are rotatably supported coaxially to the casing, and both gears are disposed relatively movably in the axial direction. The two gears are coupled through a clutch mechanism to integrally rotates, disengaged by a manual operating member as required, and only the gear near the output shaft can be rotated.