| 摘要 |
PURPOSE:To prevent a clutch spring from deforming and to improve the durability by slidably mounting the spring on the periphery of a rotational shaft, securing its one end to a rockable arm for preventing a reverse rotation, and contacting the other end with other stationary portion. CONSTITUTION:A clutch spring 3 is slidably mounted on a rotational shaft 1 from which projections 2 are projected. A reverse-preventing rockable arm 6 and a stationary pin 9 are arranged on the outer periphery of the shaft 1. The end 4a of the arm 4 of the spring 3 is engaged with the projection 7 of the arm 6, and the other end 8 is contacted with the pin 9. Thus, when the shaft 1 starts rotating counterclockwise, the end 8 of the spring 9 is engaged with the pin 9, the arm 4 rocks the arm 6 to make contact with the projection 2. Thus, even when the shaft 1 reversely rotates with high energy, it can effectively prevent it from reversely rotating. |
