Patent ID: 7158736

Claim:
A process cartridge detachably mountable to an electrophotographic image forming apparatus, said process cartridge comprising: an electrophotographic photosensitive drum; a developing roller configured and positioned to develop an electrostatic latent image formed on said electrophotographic photosensitive drum; a first frame supporting said electrophotographic photosensitive drum; a second frame supporting said developing roller; a coupling member configured and positioned to rotatably couple said first frame and said second frame; a first cartridge positioning portion which is provided at each of one and the other longitudinal end portions of said process cartridge and which is abuttable to a first main assembly positioning portion provided in a main assembly of the apparatus to position said process cartridge with respect to a direction crossing a direction of an axis of said electrophotographic photosensitive drum, when said process cartridge is mounted to the main assembly of the apparatus; a drive input gear, provided at one of the longitudinal ends of said second frame, configured and positioned to engage a main assembly driving gear provided in the main assembly to receive a rotational driving force for rotating said developing roller; a second cartridge positioning portion which is provided at one longitudinal end portion of said process cartridge and which is abuttable to a second main assembly positioning portion provided in the main assembly of the apparatus to limit rotation of said process cartridge about said first cartridge positioning portion, when said driving input gear receives the rotational driving force from the main assembly driving gear, wherein in a state in which said process cartridge is set in the main assembly of the apparatus, said coupling member is located at a position crossing a phantom line which is perpendicular to the second main assembly positioning portion abutting second cartridge positioning portion and which passes through said second cartridge positioning portion, as seen from one end of said cartridge with respect to the axis.