| 摘要 |
PURPOSE:To reduce a machining cost and a material cost for reducing an overall cost by providing a rubber part on a drive roller for driving a photosensitive body at its center. CONSTITUTION:A drive roller 20 comprises a roller shaft 20a and a rubber part 20b provided at the center of the roller shaft 20a. The drive roller 20 is rotated by rotating the roller shaft 20a drivingly by an external drive power. Also, when the drive roller 20 is set inside a photosensitive body 4, a rubber part 20b is made in contact with the photosensitive body 4 at its center. Them when the drive roller 20 is rotated, the rubber part 20b is gripped on the rear surface of the photosensitive body 4 to transmits a drive force to the photosensitive body 4 and to circulate the photosensitive body 4. With such a construction, because any rubber material is not installed except those other than the center part of the roller shaft 20a, the cost of rubber material and the cost of materials are reduced by that amount. |
