| 摘要 |
<p>PURPOSE:To obtain a torque, which is suitable both at a play time and a fast coiling time, by arranging the driving gear and slave gear of a same diameter coaxially to upper and lower two steps as the gear for torque adjustment, providing a magnet to one side and a magnetis substance to the other side and executing an engaging to the same gear in a fast coiling side at the fast coiling time. CONSTITUTION:To a torque adjusting gear 1, a driving gear 2 and a slave gear 3 of the same module and same tooth number are coaxially arranged to the upper and lower two steps and for the gear 2, the magnetic substance is provided. Then, the magnet is provided for the gear 3. A fast coiling gear 6 is provided near the gears 2 and 3. Thus, at the play time, since the gears 2 and 3 can be mutually slipped, the suitable torque adjustment can be executed by a magnetis resistance between the magnet and magnetic substance to be provided to the both gears. At the fast coiling time, since the both gears 2 and 3 are engaged to the gear 6 and revolved in one body, a slip is not generated between the gears 2 and 3. Accordingly, the damage of a torque is not generated.</p> |
