公开(公告)号：US12130578B2

公开(公告)日：2024-10-29

申请号：US18472828

申请日：2023-09-22

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masahiko Mizuno ,  Kazuki Yoshioka

IPC: G03G15/04 ,  G03G21/16

CPC classification number: G03G21/1647 ,  G03G21/1676

Abstract: An image forming apparatus includes a drum unit, a developing unit, a developing roller bearing, a guide portion, and an urging portion. The drum unit includes a photosensitive drum. The developing unit includes a developing roller. The developing roller bearing supports the developing roller and can move radially and rotate axially with respect to the developing unit. The guide portion is formed in the drum unit and guides the developing roller bearing in directions toward and away from the photosensitive drum. The urging portion urges the developing unit in such a direction that it presses the developing roller against the photosensitive drum. The developing unit includes a restriction portion that restricts the rotation of the developing roller bearing with respect to the developing unit within a predetermined range.