Process cartridge and electrophotographic image forming apparatus

摘要

A process cartridge detachably mountable to an electrophotographic image forming apparatus, the process cartridge includes an electrophotographic photosensitive drum extending in a longitudinal direction of the process cartridge; a developing roller; a first cartridge positioning portion at each of the one and other longitudinal end portions of the process cartridge and being abuttable to a first main assembly positioning portion provided in the apparatus to position the process cartridge in a lateral direction crossing with the longitudinal direction when mounted; a second cartridge positioning portion (51a) provided at one longitudinal end portion of the process cartridge and abuttable to a second main assembly positioning portion (72) in the apparatus to limit rotation of the process cartridge about the first cartridge positioning portion when the process cartridge receives a rotational driving force (Y) for rotating the developing roller from the apparatus; a first drive input gear (76) at the one longitudinal end portion, for engagement with a main assembly driving gear (70) to transmit a rotational driving force to the developing roller; a range of engagement (Z) parallel to the longitudinal direction between the main assembly driving gear and the input gear when the input gear is engaged with the main assembly gear which overlaps with the second cartridge positioning portion (51a) as seen in a direction (V2) perpendicular to the longitudinal direction and passing through the second cartridge positioning portion.