| 摘要 |
PURPOSE:To smoothly rotate a rotary image forming body at stable speed with stable driving torque by making the rigidity of a rotary body driving system small. CONSTITUTION:A side surface member 40 where an inner peripheral part 40B elastically deformed is formed is attached to the end face of a photoreceptor drum 10, and a projection member 40C is protrusively provided on the inner peripheral part 40B so as to be engaged in the engaging hole 30A of a driving gear 30. By the driving of the gear 30, the member 40 is elastically deformed by the hole 30A, and the drum 10 is rotated by the reaction of the elastic deformation. |
