Patent ID: 7121673

Claim:
A method for attaching an electric power outer mirror-housing device for a vehicle to the vehicle, said outer mirror-housing device comprising a shaft carrying an outer mirror and a driving mechanism for electrically driving the shaft and thereby turning the mirror between a use position and a housed position, said driving mechanism comprising a motor, a worm gear for transmitting turning motions of said motor, a helical gear meshing with the worm gear, and being inserted around the shaft and slidable along an axial direction of the shaft, and a clutch holder engaged with the helical gear and adapted to transmit a turning force of the helical gear to the shaft, said method comprising: setting twisting directions of the helical gear and the worm gear so that when the housing device is attached to a given portion of the vehicle, a turning force is applied upon the shaft, in a direction opposed to a pressure of wind flowing from a front side to a rear side of the vehicle, by motion of the helical gear relative to the worm gear owing to vibration of the vehicle; and attaching the housing device to said given portion of the vehicle.