| 摘要 |
PURPOSE:To improve the workability by providing a stopping recess in a shaft for coupling a member while providing a projection to be applied with resilient function in the engaging direction with said recess on the member to be coupled. CONSTITUTION:A projection 13 is projected while facing against the shaft hole 12 on the outer endface at the boss section 11a of a gear 11 and formed integrally with the boss section 11a. Upon pushing the gear 11 to fit the shaft hole 12 from the end section of the shaft 14 while corresponding the planar section 12a of the shaft hole 12 with the flat section 14a of the shaft 14, the projection 13 will collide against the edge of the shaft 14 to deform resiliently for a while in the direction departing from the shaft hole 12 and engage in the groove 15 of the shaft 14. Consequently, mounting/dismounting of the coupling member is facilitated. |
