Patent ID: 6857754

Claim:
An adjustment device used for electric power mirrors comprising: a worm wheel rotated by an actuator with a rotational axis, an adjustment nut that can slide along a direction of said rotational axis but cannot relatively rotate against rotation of said worm wheel, and an actuator housing that has a screw portion by which said adjustment nut is assembled therewith in a fashion to be movable along a direction normal to a plane of screw rotation of said screw portion, wherein; said adjustment nut has a salient extending to an outer direction from an outer surface thereof, and said worm wheel has a stopper portion which is facing to a surface of said adjustment nut and both said adjustment nut and said worm wheel are assembled in a form such that said salient and said stopper portion bump to limit said adjustment nut not to further slide on said screw portion to be pulled off from said screw portion.