| 摘要 |
[Object] A unidirectional clutch can reduce a backlash without increasing the number of components, and also can improve silence and durability. [Means of Solving Problem] In a planet gear member 4 including a planet gear 4a which meshes an internal gear 2b of an outer member 2,locking teeth 4b are provided coaxially and integrally relative to the planet gear through a flange 4c. In an inner member 3, U-shaped wall portions 3b receiving the locking teeth 4b are provided. In the U-shaped wall portion, an engaging portion 5 is provided so that teeth of one portion of the locking teeth can engage. A locked state is attained by the locking teeth, so that even if the planet gear receives a restriction of the number of teeth, the number of the teeth (pitch) of the locking teeth can be finely set arbitrarily. Accordingly, an interval of the locked state accompanied by a rotation of the planet gear member becomes fine so as to be capable of reducing the backlash in the unidirectional clutch without increasing the number of components. |
