PURPOSE: To provide an image forming unit and an electrophotographic device capable of obtaining a clear image without jitter.
CONSTITUTION: By setting so that the mutual phases of load fluctuations generated at every pitch of tooth in a 1st transmission part 26 for driving a photoreceptor drum 1 and a 2nd transmission part 27 for driving a developing means may be shifted so as to cancel the load fluctuations each other, composite load fluctuation is reduced. The phases of the load fluctuations generated at every pitch of tooth at the respective engaging parts of gear systems such as a roller driving gear 23, an intermediate gear 24 and a roller gear 25 are shifted, so that the composite load fluctuation is reduced. Thus, the speed variation of the rotation of the photoreceptor is made small.
YAMAMOTO HAJIME
IMAI MASARU
