| 摘要 |
PURPOSE:To improve the ability of assembling an irradiation device to a photosensitive drum and to eliminate an adjusting work by pressing a positioning member which is integrally formed with the irradiation device to the rotary shaft of the photosensitive drum or a rotary shaft supporting member through an elastic member so that the irradiation device may be positioned to the photosensitive drum. CONSTITUTION:The irradiation device 21 is held so that it can move in the optical axis direction of its emitted light with respect to the photosensitive drum 13 and the positioning member 21-b which is integrally formed with the irradiation device 21 is pressed to the rotary shaft 13a of the photosensitive drum 13 or the rotary shaft supporting member 26-a through the elastic member 22 so that the irradiation device 21 may be positioned to the photosensitive drum 13. A part of the irradiation device directly comes into contact with the photosensitive drum 13 and the positional relation between the irradiation device 21 and the photosensitive drum 13 is decided. Thus, the ability of assembling the irradiation device to the photosensitive drum is improved and the adjusting work is eliminated. |
