Patent ID: 7689148
Filing Date: 2010-03-30
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: a developing unit; a transfer unit; and a photosensitive drum assembly, which includes: a photosensitive drum; a driven section, which is provided integrally with the photosensitive drum; and a driving section, which transmits a driving force to the driven section to rotate the photosensitive drum, wherein either one of the driven section and the driving section comprises a contact face, which constitutes a part of a plane including a rotation axis of the photosensitive drum, and the other of the driven section and the driving section comprises a single boss, which is substantially in parallel with the rotation axis and contacts with the contact face; wherein an outer periphery of the photosensitive drum and an outer periphery of a member having the driving section are formed in a shape of cylindrical faces of concentric circles.