| 摘要 |
PROBLEM TO BE SOLVED: To reduce a manufacturing cost, and to improve a processing property by arranging an axis of a supporting shaft and a rotating axis of an electric motor in parallel with each other so as to promote supporting accuracy, in an electric retractable door mirror provided with a reduction gear system having a first and a second worm between a movable bracket rotatably supported by the supporting shaft and the electric motor in the movable bracket side. SOLUTION: A first spur gear 21 integrally rotating with a second worm 22 meshes with a first worm 20, and a second spur gear 23 having a rotating axis parallel to a supporting shaft meshes the second worm 22. A rotating axis C1 of the first worm 20 parallel to the supporting shaft and a rotating axis C2 of the second worm 22 of which a lead angle is set as same as the first worm 20 are arranged in such a way to tilt from plane surfaces S1, S2 orthogonal to the rotating axis of the first and the second spur gears 21, 23 by an angleαcorresponding to the lead angle of both worms 20, 22.
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