| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a structure, and reduce the number of part items by integrally forming a pulley groove part of a rotary body with a friction plate part, arranging a coil in a back part of the friction plate part, and supporting the coil by a support part for extending a space non-interfering with a belt from a housing. SOLUTION: In a rotary body 10, a pulley groove part 10a for installing a belt 20, a recessed part 10b for fitting a coil 130 and a friction plate part 11 are integrally formed, a coil fixing member 30 is arranged in a disk part 30c and a recessed part 10b press-fitted to a housing 140, and is composed of a coil support part 30a for fitting the coil 130 and a connecting part 30b of both. The connecting part 30b is partially formed in a part of not inserting the belt 20 in the circumferential direction for avoiding interference with the belt 20, and the coil 130 is supported as a cantilever by the disk part 30c. Thus, the number of part items is reduced, assembling is simplified while holding arrangement of a bearing having no moment action by rotational driving, and assembling manhours can be reduced.</p> |
