Patent ID: 8909092

Claim:
A process cartridge detachably attached to a main assembly of an electrophotographic image forming apparatus, the process cartridge comprising: a photosensitive member unit configured to include a photosensitive drum; a development roller configured to develop an electrostatic latent image formed on the photosensitive drum using a developer; a developing unit configured to include the development roller and to be combined with the photosensitive member unit to be movable, wherein the developing unit secures a development position at which the developing roller develops the electrostatic latent image and a non-development position at which the developing roller retreats from the development position; a process unit configured to act on the photosensitive drum by contacting the photosensitive drum; and a support member disposed within the photosensitive member unit and configured to support the photosensitive drum such that the photosensitive drum is movable with respect to the photosensitive member unit, wherein the photosensitive drum moves with respect to the photosensitive member unit and is thereby permitted to secure an acting position at which the photosensitive drum is brought into contact with the process unit, and a non-acting position at which the photosensitive drum is separated from the process unit or is brought into contact with the process unit with a pressure lower than a pressure with which the photosensitive drum contacts the process unit at the acting position, and wherein, by the development roller urging the photosensitive drum, the photosensitive drum is permitted to secure the acting position when the developing unit is located at the development position, and by the development roller retreating, the photosensitive drum is permitted to secure the non-acting position when the developing unit is located at the non-development position.