| 摘要 |
An operation switching mechanism is provided in a driving force transmission path that is a path through which a driving force is transmitted from an output shaft to a pinion. When a torque of a predetermined magnitude or more acts on the operation switching mechanism, the operating state of the operation switching mechanism is switched from a linked state in which the driving force transmission path is linked to an unlinked/released state in which the driving force transmission path is unlinked and released, and when the magnitude of the acting torque drops below the predetermined magnitude after the operating state is switched to the unlinked/released state, the operating state can return to the linked state. |
