| 摘要 |
PURPOSE:To uniformly press each slider, by projecting out both ends of an opening part in the pressing section of a cam plate, outwardly in the radial direction. CONSTITUTION:Each slider 27 moves under centrifugal force to a position which is slightly projected from the outer periphery of a cam plate 25. However, since both ends 26a of an opening part in a pressing section 26 are projected outwardly in the radial direction, the slider 27 is never projected from the pressing section 26. The side end sections of the opening in the pressing section 26 of the cam plate 25 do not make into contact with a circumferential groove 27a in the slider even though the slider 27 slides in the radial direction. Therefore, the pressing section 26 of the cam plate 25 uniformly presses the circumferential groove 27a of the slider 27 so that it is possible to prevent the pressing force from being concentrated to one part. |
