| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the assembling process and reduce cost. SOLUTION: A cylindrical part 172 through which a shaft 13 is passed, is integrally formed in a gear 17, and plural position regulation parts consisting of a pair of position regulating projections formed on the gear 17 side, and plural fallout stopping projections 176 formed on the tip part are formed on the outer periphery of the cylindrical part 172, while an armature 18 and a ring body 19 are fitted on the outer periphery of the cylindrical part so that the ring body 19 is positioned on the fallout stopping projection 176 side. The armature 18 is provided with a through hole 181 introduced into the cylindrical part 172, and a projected part 182 which is a peripheral edge of the through hole 181 and which is fitted between a pair of position regulating projections. Further, the ring body 19 is made of elastic high polymer material, and has a larger radial thickness than a gap between the cylindrical part 172 and the projected part 182, and is fitted on the cylindrical part 172 in state where it is prevented from falling out by the fallout stopping projections 176.</p> |
