Drive device in an image-forming machine

摘要

A transmission member is fitted to a flange member to which a photosensitive drum is fitted. The transmission member is made of a synthetic resin and includes an output gear that engages with a drive gear of a transfer drum. The output gear is formed on the outer periphery of a cylindrical portion formed on one end side of the transfer member. An outer peripheral support surface is formed along the circumference on one end side of the flange member. The inner peripheral surface of a cylindrical portion of the output gear is fitted onto, and is supported by, the outer peripheral support surface of the flange member.