Process cartridge, mounting method of electrophotographic photosensitive drum and replacing method of the photosensitive drum

摘要

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum; process means actable on the photosensitive drum; a drum frame rotatably supporting the photosensitive drum; a first drum frame opening provided at a first longitudinal end of the drum frame; a second drum frame opening provided at a second longitudinal end of the drum frame; a first end regulating portion provided at the first longitudinal end of the drum frame; a second end regulating portion provided at the second longitudinal end of the drum frame, a drum shaft which is penetrated through the photosensitive drum to be engaged with the first drum frame opening and the the second drum frame opening and is provided with a through hole extending in a direction perpendicular to the drum shaft; a first end flange provided at a first end of the photosensitive drum; a first end flange opening, provided to the first end flange, for penetrating the drum shaft therethrough; a first opening and a second opening which are provided opposite from each other at a periphery of the first end flange opening in a direction perpendicular to a longitudinal direction of the the photosensitive drum; and a connecting member which is penetrated through the first opening and the through hole and engaged with the second opening to connect the photosensitive drum with the drum shaft. The first end regulating portion and the second end regulating portion regulate a position of the photosensitive drum in its longitudinal direction and the connecting member connects the drum shaft with the photosensitive drum so that the photosensitive drum is supported rotatably to the drum frame with the drum shaft.