| 摘要 |
PROBLEM TO BE SOLVED: To make a clutch well function by absorbing possible slippage even if a male part and a female part, which constitutes a clutch, are relatively slipped off in position and attitude in a clutch intermitting the transmission of rotational driving force mechanically. SOLUTION: A female part 67 has a spherical recessed part 93 at the center, and includes plural fitting recessed parts around the recessed part. A male part 69 has a spherical projected part 101 at the center portion, and includes a plurality of fitting pawls 103 around the aforesaid projected part. The fitting recessed parts of the female part and the boundary portions 97c of the fitting recessed parts, are formed into a circular arc shape each at their tip ends. And the tip end 103A of each fitting pawl is also formed into a circular arc shape. The dimension in the circumferential direction of the plural fitting recessed parts, is larger than the dimension in the circumferential direction of the plural fitting pawls, and the back lash 105 is formed between both of them. The back lash formed at the base portions of the plural fitting pawls is made larger than that formed at their tip ends. In addition, a horn shaped guide is provided around the female part coming to a standstill when a clutch is intermitted, in a state that it is opened forward.
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