| 摘要 |
PURPOSE:To make rotational transmission possible from the driving side to the driven side but to prevent rotational transmission from the driven side to the driving side. CONSTITUTION:In a fixedly held immobile housing 5, a load cam 6 on the driven side is loosely arranged on the inner peripheral sides of a plurality of clutch pieces 8 projectingly formed on a driving cam on the driving side so as to be interferred with them. Rolling bodies 4 are interposed between pressing tips 8B of the clutch pieces 8 and in the space formed by clutch groove parts 7C on the load cam 6 outer periphery and the housing 5 inner peripheral surface. In the rotation on the driving side, the load cam 6 is driven and rotated by pressing and moving the rolling bodies 4 into the clutch groove parts 7C through the pressing tips 8B, while, in the rotation on the driven side, the rotation of the load cam 6 itself is stopped by pressing and moving the rolling bodies 4 to the housing 5 inner peripheral surface by the clutch groove parts 7C. |
