| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the temperature rise of a solenoid even when the linked operating time of a clutch mechanism is prolonged, prevent the reduction of the attracting force of an armature, and further save electric power with a simple structure. SOLUTION: A permanent magnet 33 assisting attraction when an armature for hooking the ratchet wheel part 14A of a spring clutch is attracted to an electric magnet part 41 side is provided near the electric magnet part 41.</p> |
