Patent ID: 7899364

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