Process cartridge

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).