| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanism including rollers which form nips, configured to release the rollers from pressure with a simple mechanism according to operation of an image forming apparatus.SOLUTION: A first bearing unit 241 allows a charging roller 22 to be displaced in a contact/separation direction with respect to a photoreceptor drum 121, and supports the charging roller 22 with play in the contact/separation direction when the charging roller 22 is mounted on a cleaning roller 23. A bushing member 24 is moved according to image forming operation. When the charging roller 22 nips the photoreceptor drum 121, the first bearing unit 241 supports the charging roller 22 so that the charging roller 22 displaces toward the cleaning roller 23 in the first bearing unit 241 by pressure of the photoreceptor drum 121. |
