| 摘要 |
PURPOSE:To reduce the irregularity of the speed of an optical system and the generation of vibrations and to improve picture quality by transmitting the turning force from the turning shaft of the motor of a copying machine, etc. to a take-up pulley through pulleys and a wire, and make the revolutional force transmit continuously. CONSTITUTION:As a motor 29 is driven to turn a driving pulley 28, the turning force is transmitted form the driving pulley 28 to a driven pulley 27 while a wire 31 is wound around the driving pulley 28 and driven pulley 27 mutually. Since the driven pulley 27 and a take-up pulley 20 rotate in on body, the 1st carriage 9 and 2nd carriage 13, as the driven pulley 27 rotates as shown by an arrow (d), move synchronously as shown by arrows (b) and (c) respectively at different speed in 2:1 proportion, and the 1st mirror 3 and 2nd mirror 4 also scan correspondingly at ratio 2:1 to expose an original to picture light in a slit shape. |
