Patent ID: 8401424

Claim:
A process cartridge detachably mountable in a main assembly of an electrophotographic image forming apparatus, comprising: an electrophotographic photosensitive drum; a drum unit supporting said electrophotographic photosensitive drum; a developing roller for developing an electrostatic latent image formed on said electrophotographic photosensitive drum while being in contact with said electrophotographic photosensitive drum; a developer supplying roller for supplying the developer to said developing roller; a developer accommodating portion accommodating the developer to be used for developing the electrostatic latent image by said developing roller and having a developer supply opening for supplying the accommodated developer to said developing roller; a developing unit swingably coupled with said drum unit and supporting said developing roller, said developer supplying roller and said developer accommodating portion; a first-end developing-device spacing member, rotatably provided on a leading end portion of said process cartridge with respect to a mounting direction in which said process cartridge is mounted to the main assembly of the apparatus, for limiting rotation of said developing unit relative to said drum unit by engaging with a first end engaging portion so as to maintain spacing between said developing roller and said electrophotographic photosensitive drum; and a second-end developing-device spacing member, rotatably provided on a trailing end portion of said process cartridge with respect to the mounting direction, for limiting rotation of said developing unit relative to said drum unit by engagement with a second end engaging portion so as to maintain spacing between said developing roller and said electrophotographic photosensitive drum.