Patent ID: 8634746

Claim:
A photosensitive drum cartridge comprising: a photosensitive drum; a primary cleaning roller which is configured to contact a surface of the photosensitive drum to remove an attached matter on the surface of the photosensitive drum; a first gear which is configured to rotate together with the photosensitive drum; a second gear which is configured to rotate together with the primary cleaning roller; a third gear which is configured to mesh with the first gear and the second gear, and which has a rotation axis, a position of which is fixed such that a distance from a rotation axis of the first gear is constant; and an intershaft distance fixing member which fixes the respective positions of the rotation axes of the first gear, the second gear and the third gear such that the distance between the rotation axis of the first gear and the rotation axis of the second gear, the distance between the rotation axis of the second gear and the rotation axis of the third gear and the distance between the rotation axis of the third gear and the rotation axis of the first gear are constant, respectively.