| 摘要 |
PURPOSE:To simplify the constitution of the titled device, by shifting an optical member with the driving force given from a driving force transmitting member when the coupling magnification is changed, cancelling the driving force before the optical member reaches the position of a selected magnification and then shifting the optical member with the energizing force of an elastic member. CONSTITUTION:When the equimultiple image transmission mode is switched to the enlarged image transmission mode, an operator moves and operation lever 19 toward an arrow mark R by means of a bandle 19''. Thus the left edge face in the longer side direction of a slit 19' hits a pin 18 to press the pin 18. As a result, a lever 17 turns counterclockwise around a shaft 16, and the right edge face 17'R at the tip of the lever 17 pushes a carrier roller 15 to move a lens carrier to the left side. When the lever 17 keeps the counterclockwise turning, pins 18 and 21 are set on a straight line to the shaft 16. The direction of the rotational moment is operated centering on the positions of the pins 18 and 21 by a spring 22 to the lever 17. The left edge face 19''L of the lever 19 hits a stopper 20' immediately before the carrier 10 touches the stopper 20' of the left side. In the next moment, the pin 18 starts its shift to the right in the slit 19' with the counterclockwise moment caused by the spring 22. |
