| 摘要 |
<p>PURPOSE:To suppress the colliding noise of a movable part against a clutch cam, by resetting the movable part toward the peripheral surface of the clutch cam to be once received by a swollen part, which protrudes in the radial direction, when the clutch cam is stopped. CONSTITUTION:Electromagnet 18 are excited, and if armatures 19 are turned to a side of stoppers 22 about an engaging part, where notches 24 engage with protrusive pieces 27, serving as the supporting point, friction force with a driving shaft 3 causes a coil spring 12 to make a follow-up rotary motion counterclockwise with a clutch cam 15. Here a very small clearance is generated between the armatures 19 and a protrusive swollen part 23 provided in the clutch cam 15. Accordingly, the armature 19, even if it is reset by disconnecting electrification to the electromagnet 18, fine moves being immediately supported to the protrusive swollen part 23, and the armature is reset to a position, where it engages with a stopper hook 17, just before the clutch cam 15 finishes its one rotation. As a result, a colliding sound of the armature 19 against the clutch cam 15 can be decreased to a small level.</p> |
