| 摘要 |
PURPOSE:To keep the image forming distance of an exposure optical system for a photosensitive layer constant with no fluctuation by supporting or fitting an image forming body and an image exposure means on a common member. CONSTITUTION:A support shaft 20A protruded on the axis and multiple guide rollers 20R arranged into a ring shape are provided on a support member 20 to be fitted with an exposure optical system 12. Flanges 10A, 10B of a photoreceptor drum 10 are supported by bearings respectively to rotatably integrate the photoreceptor drum 10, a charging unit 11 and a cleaning device 19 are added to the photoreceptor drum 10 and the incorporated exposure optical system 12, they are covered with a protective cover 30 to form a unit U, and the unit U is supported and fixed between boards 40A, 40B in the device main body. |
