| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a one-way rotation prevention mechanism that can efficiently transmit torque, and is hard to be broken even in a case where large torque is transmitted.SOLUTION: In a one-way rotation prevention mechanism 17, an elastic member 17g pressing a roller 17e against one of a pair of annular parts 17b is provided in the other one of the pair of the annular parts 17b forming a holding chamber 17d, and a projection part 17h is provided in the one of the pair of annular parts 17b forming the holding chamber 17d so as to project toward the other one side of the pair of annular parts 17b.</p> |
