| 摘要 |
PURPOSE:To reduce the occurrence of the impact noise and ensure a light and smooth operation of mode conversion, by providing the function of a machine governor to a motor. CONSTITUTION:When the electric conduction is stopped to a motor 22, a gear 23 turns by the function of a spiral spring 26. Then a support stage 14 presses a contact spring 24 by the springing force of a spring 19. As a result, the gear 23 and the motor 22 turn in the opposite direction to each other, and accordingly the stage 14 goes back to the position of stop mode. At this moment, posts 21a-21c touch the end part of slit 20a-20c respectively to stop there. In this case, a contact pin 26a is already apart from the bent end part of the spring 26. In such way, the motor 22 functions as a machine governor, the thus the stage 14 goes gently back to its stop position. |
