| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of components which are used, to make the pressure of contact between a latent-image carrier and a developer carrier uniform, and to minimize damage to them at the start of an operation. SOLUTION: On both external sides of a developing device 53 and in upper parts of them, engagement members 61 a and 62b are provided. Long holes for engaging the engagement members are made in a housing 62 holding the photoreceptive drum 51 and the developing device integrally. The long holes on the photoreceptive-drum side incline downward, and the inclination is set as small in angle at which the engagement members can slide down by the weight of the developing device itself and come contact with the photoreceptive drum as possible. In the state where the developing roller 57 of the developing device is in contact with the photoreceptive drum, the engagement member are movably supported, to be moved apart from the photoreceptive drum when strong frictional force acts on the developing roller at the start of the operation. |
