| 摘要 |
PURPOSE:To enlarge the rotational range of output shaft and to improve the controllability in the rotary positioning by performing the rotary positioning of the output shaft through repetition of micro straight displacement of an actuator. CONSTITUTION:Micro rotation of a shaft 6 produced through first straight motion of a lever driving actuator 8 is transmitted through a one-way clutch 12 to an output shaft 9 thus causing micro rotation of the output shaft 9. At that time, an actuator 14 for securing the output shaft does not function. Consequently, the lever driving actuator 8 is turned OFF but the shaft 6 is rotated reversely by means of a return spring 21. The reverse rotation is not transmitted through the one-way clutch 12 to the output shaft 9. But, since the output shaft 9 idles, the actuator 14 for securing the output shaft is actuated to lock the output shaft 9. The operation is repeated to position the output shaft 9 at a predetermined rotary position. |
