| 摘要 |
PURPOSE:To provide an image forming device preventing fluctuations in a moving pitch in the subscanning direction of a photosensitive body, and further, highly accurately executing alignment for superimposing the toner images of each color. CONSTITUTION:A slit 40a is provided on a rotary disk 40 provided opposite to the side surface of a photosensitive drum 1, in a radial direction, at an equal interval, and linked with the photosensitive drum 1. A photointerruptor 41 is provided opposite to the rotary disk 40 and serves as an optical sensor whose light source part and photodetecting part 14 are integrated, and detects the slit 40a moving at the opposite position, so that a moving pulse is outputted to a motor driving pulse number correcting circuit 34. |
