Process unit, photosensitive member cartridge, developer cartridge, and image forming apparatus

摘要

A process unit detachably attachable to an image forming apparatus includes a photosensitive member cartridge having a photosensitive member, and a developer cartridge having a developing roller that supplies a developer to the photosensitive member. Urging devices are provided on right and left sides of the photosensitive member cartridge to urge a developing roller to the photosensitive member. Action-receiving portions provided on the opposite sides of the developer cartridge receive action performed by the urging devices. Each urging device has a frame-like slide support member pivotably connected to the corresponding side wall inner surface of the photosensitive member cartridge via pivots, and a motion acting portion protruded outwardly from the slide support member beyond the side wall. Guide surfaces are provided on the opposite sides of an image forming apparatus housing. As the process unit is moved into the housing, the motion acting portion of each urging device slides along the upward and downward slopes of one of the guide surfaces, whereby the slide support member is changed from a non-urging orientation to an urging orientation relative to the action-receiving portion, so that the developing roller can be pressed against to the photosensitive drum.