| 摘要 |
PROBLEM TO BE SOLVED: To reduce a relative rotation amount in fixing a rotation ratio between an input-side rotating body and an output-side rotating body and to reduce a play amount between the both rotating bodies in their fixed states. SOLUTION: When a first clutch plate 92 supported to a rotary shaft body 43 is moved in the rotary shaft direction, it is engaged with a second clutch plate 93 fixed to the input-side rotating body 41 and connected so as not to relatively rotate the input-side rotating body 41 to the rotary shaft body 43. Multiple tapered cross section projecting beams 92b and 93b getting narrower towards the top sides are formed in such a state as radially extending about the rotary shaft in the whole circumference in the respective clutch surfaces 92a and 93a. The tapered surfaces 92c and 93c mutually abut to each other so that the respective projecting beams 92b and 93b are engaged with each other and as the tapered surfaces are geared with more deeply, the respective projecting beams are so engaged that the both rotating bodies 41 and 42 are prevented from relatively rotating. |
