Patent ID: 8155552

Claim:
An image forming apparatus comprising: an image forming apparatus body comprising a driving force transmitting portion; and a process cartridge that is configured to be removably mounted to the image forming apparatus body, wherein the process cartridge comprises: a housing; a photosensitive drum disposed in the housing; a first bearing configured to rotatably support a first axial end portion of the photosensitive drum and permit movement of the photosensitive drum in an axial direction of the photosensitive drum; a driving force input portion provided on the first axial end portion of the photosensitive drum and configured to engage the driving force transmitting portion in the axial direction of the photosensitive drum, wherein the driving force input portion is further configured to receive a driving force transmitted from the driving force transmitting portion in response to the driving force transmitting portion pressing against the driving force input portion and drive the photosensitive drum using the driving force; and a second bearing configured to rotatably support a second axial end of the photosensitive drum and permit movement of the photosensitive drum in the axial direction, wherein the second bearing comprises a contact portion configured to contact the image forming apparatus body in response to the driving force transmitting portion pressing against the driving force input portion.