| 摘要 |
PROBLEM TO BE SOLVED: To improve image quality more b constituting a frame body which holds a developing roller so that the developing roller is made so movable as to swing to at least one side of a photoreceptor, suppressing deformation of a swing support part supporting the movable frame body by reinforcing the swing support member, and stabilizing the position where the developing roller abuts against the photoreceptor drum. SOLUTION: A support hole 59 is formed in a support arm 55 of a developing unit frame body 50 which supports one swing frame body 42 of the moving frame body 40 holding the developing roller 20 swingably through an engagement pin 80 and a support pin 111 is formed at the position of a side cover 100, coupling the flanks of a photoreceptor unit and a developing device unit A, corresponding to the support hole 59. When the side cover 100 is coupled with the photoreceptor unit and developing device unit A, the support pin 111 is fitted into the support hole 59 of the support arm 55. The support arm 55 is supported by the side cover 100 and reinforced to stabilize the position where the developing roller abuts against the photoreceptor drum. |
