Patent ID: 8805242

Claim:
A process cartridge comprising a charging member, a developing member, a cleaning member and a photosensitive drum driving component in conjunction with an image forming apparatus driving head, wherein the image forming apparatus driving head ( 20 ) includes a recess ( 11 ) comprising a hole having three twisted-sections ( 12 ), each of which contains an end surface edge ( 13 ); wherein the photosensitive drum driving component includes a drum gear ( 2 ) provided at an end of the photosensitive drum ( 1 ) and connected to the photosensitive drum ( 1 ), a drum shaft ( 3 ) outwardly projected in an axis direction from an end of the drum gear ( 2 ) for rotatably supporting the photosensitive drum and a boss ( 4 ) outwardly projected from an end surface of the drum shaft ( 3 ); a first tooth ( 5 ) and a second tooth ( 6 ) in a radial direction of the boss ( 4 ) are provided on a side wall of the boss ( 4 ), wherein the first tooth ( 5 ) is obliquely mounted on the side wall of the boss, the first tooth comprising a first longitudinal axis that is oblique to the axis direction of the drum shaft, further wherein the second tooth ( 6 ) outwardly projected along the radial direction of the boss ( 4 ) is vertically mounted on the end surface of the drum shaft, the second tooth comprising a second longitudinal axis that is vertical to the end surface and parallel to the axis direction; the first tooth ( 5 ) is engaged with a twisted-section ( 12 ) of the twisted recess ( 11 ) in the image forming apparatus and the second tooth ( 6 ) is engaged with an end surface edge ( 13 ) of other twisted-sections ( 12 ) of the twisted recess ( 11 ) in the image forming apparatus; the boss ( 4 ) synchronously rotated with the image forming apparatus driving head ( 20 ) transmits the received driving force to the photosensitive drum ( 1 ) through a drum shaft ( 3 ) and a drum gear ( 2 ) connected to the boss in order to drive the photosensitive drum ( 1 ).