| 摘要 |
PURPOSE:To decrease power consumption and to suppress increase in temperature in the device, by performing clicking movement of a control arm which tilts the roller between two stopping points by two external forces of starting means by using an elastic member, and vibrating the arm by the current conduction in a short time. CONSTITUTION:When the arm 22 is located at a neutral point, a pulling coil spring 27 is under the state it is extremely pulled. The arm 22 receives the slight external force by the contracting force of the spring and readily performs the clicking movement. The arm hits either of stopper pins and stops. Solenoids 28 and 29 inpart said external force to the arm 22. When the arm 22 hits the left stopper pin 23 and stops, the right solenoid 29 is turned ON and attracts the arm 22 to the right side. The arm 22 hits the right stopper pin 24 and stops. The solenoids 28 and 29 are excited to the extent the arm 22 is attracted to the point slightly exceeding the neutral point. Thereafter the arm 22 is moved by itself, owing to the click movement of the spring 27. |
