The device comprises a worm wheel (1) driven in rotation by a worm (2) coupled to the output shaft (3) of a motor-speed reducer (4), a gear pinion (5) associated with the worm wheel (1) for driving the accessory, and means interposed between the gear pinion (5) and the worm wheel (1)
The mechanism comprises:a lever (8) pivotally mounted on a fixed pin (9) at one of the ends of the lever,a fork member (11) rotatively mounted on a pin (12) fixed to the lever (8), the fork member being adapted to receive a keeper (3) fixed to a center post of the body of the vehicle, th
