Patent ID: 7158735

Claim:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, comprising: an electrophotographic photosensitive drum; a process device actable on said electrophotographic photosensitive drum; a drum frame rotatably supporting said electrophotographic photosensitive drum; a first drum frame opening provided at a first longitudinal end of said drum frame; a second drum frame opening provided at a second longitudinal end of said drum frame; a first end regulating portion provided at the first longitudinal end of said drum frame; a second end regulating portion provided at the second longitudinal end of said drum frame; a drum shaft which penetrates through said electrophotographic photosensitive drum to be engaged with said first drum frame opening and said second drum frame opening and is provided with a through hole extending in a direction perpendicular to the longitudinal direction of said drum shaft; a first end flange provided at a first end of said electrophotographic photosensitive drum; a first end flange opening in said first end flange, configured and positioned to permit penetration of said drum shaft therethrough; a first opening and a second opening which are provided opposite from each other at a periphery of said first end flange and which open in a direction perpendicular to a longitudinal direction of said electrophotographic photosensitive drum; and a connecting member which penetrates through said first opening and said through hole and engages said second opening to connect said electrophotographic photosensitive drum with said drum shaft, wherein said first end regulating portion and said second end regulating portion regulate a position of said electrophotographic photosensitive drum in its longitudinal direction and said connecting member connects said drum shaft with said electrophotographic photosensitive drum so that said electrophotographic photosensitive drum is rotatably supported by said drum frame with said drum shaft, wherein said first end regulating portion has a first configuration which is provided at the first longitudinal end of said drum frame and regulates a position of an end surface of said first end flange, and wherein said second end regulating portion has a second configuration, is located at the second longitudinal end of said drum frame, and regulates a position of an end surface of a second end flange provided at a second end of said electrophotographic photosensitive drum.