PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS

摘要

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a rotatable first main assembly drive transmission member and a rotatable second main assembly drive transmission member, the process cartridge includes an electrophotographic photosensitive drum; a drum unit containing the electrophotographic drum; a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum with a developer; a developing unit containing the developing roller and movably connected with the drum unit, the developing unit being movable relative to the drum unit between a contact position in which the developing roller is contacted to the electrophotographic photosensitive drum and a spaced position in which the developing roller is spaced from the electrophotographic photosensitive drum; a drum coupling member, provided on one axial end of the electrophotographic photosensitive drum, for engaging with the first main assembly drive transmission member and transmitting a first rotational driving force to the electrophotographic photosensitive drum, when the process cartridge is mounted to the main assembly of the apparatus along an axial direction of the electrophotographic photosensitive drum; a shaft coupling member, provided on one axial end of the developing roller, for transmitting a second rotational driving force with a deviation permitted between an axis of the second main assembly drive transmission member and an axis of the developing roller, wherein the shaft coupling member includes an engaging portion for engaging with the second main assembly drive transmission member and receiving the second rotational driving force, when the process cartridge is mounted to the main assembly of the apparatus; the engaging portion is movable in a direction crossing with the axial direction of the developing roller; and when the process cartridge enters the main assembly of the apparatus with the developing unit positioned in the spaced position , an axis of the engaging portion is deviated from the axis of the developing roller with respect to the crossing direction.