Process cartridge and electrophotographic image forming apparatus

A process cartridge, comprising a cartridge body, a photosensitive drum having a first axis, and a driving force receiving member having a second axis, wherein the photosensitive drum is rotatably supported between two end walls of the cartridge body, and the driving force receiving member comprises a head portion and a shaft portion;

• wherein
• the driving force receiving member is connected to an axial end of the photosensitive drum through an Oldham coupling;
• a rotation angle limiting mechanism is disposed between the driving force receiving member and the photosensitive drum to regulate a relative rotation of the driving force receiving member with respect to the photosensitive drum;
• and
• the driving force receiving member is movable in a direction perpendicular to the first axis and rotatable around the second axis such that the second axis is either co-axial or parallel with the first axis;
• the shaft portion further comprises a guided portion formed by an elliptical cylinder portion;
• the process cartridge further comprises a sliding plate disposed on one of the end walls of the cartridge body, and is provided with a round hole;
• the shaft portion further comprises an engaging portion formed by a cylinder portion;
• the guided portion is disposed between the engaging portion and the head portion;
• and the round hole is in engagement with the engaging portion;
• wherein the sliding plate is slidable between (i) a first position in which the second axis is co-axial with the first axis and (ii) a second position in which the second axis is parallel with the first axis.