| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving side cam of a Geneva gear and the like capable of accurately forming a circumferential groove for retaining a rotator such as a ball and the like, and ensuring the smooth rotation of the rotator. SOLUTION: A circular arc-shaped circumferential groove 22 concentric to a driving shaft center, is formed on a circular arc-shaped peripheral surface 21 of a partially missed disc-shaped core member 20, and a rotator 50 fitted to the circumferential groove 22 is retained by the rims 31, 41 of the upper and lower covers 30, 40 to prevent its removement. |
