| 摘要 |
PURPOSE:To perform magnification conversion of plural stages without depending upon solenoids and link mechanisms by providing a stopper member turned by pins moving together with a lens housing between two pieces of stoppers which locate the lens housing. CONSTITUTION:A lens housing 7 has a frame body 7a supported by a guide rod 12 provided in the moving direction of an original, and in the position where part of the frame body 7a abuts on a stopper body 13, locating of a copying magnification m1 is accomplished. Thence, as a chain 15 rotates, the housing 7 is moved rightward by a pin 16 and a spring 17 until it abuts on a stopper 18, whereby the locating of a copying magnification m2 is accomplished. Next, the chain 15 moves reverse to move the housing 7 leftward, and where the housing 7 abuts on the long side end part of a stopper member 19, the locating of a copying magnification m3 is accomplished. |
