| 摘要 |
PURPOSE:To transmit the rotation of a motor to an image holding body accurately without causing a high cost by providing a positioning member of the image holding body at a part of a gear installing plate, in an image forming device of a copying machine or the like. CONSTITUTION:A groove-form of drum positioning member 11a is formed at a gear installing plate 11. By gearing the center axis 31 of a photo-sensitive drum 33 to the drum positioning member 11a, the relative position of a drum gear 32 formed at the photo-sensitive drum 33 and a drum driving gear 18 is determined, and both members are geared each other. As a result, a gear train to transmit the rotation force of the driving motor to the photo-sensitive drum 33 is positioned in the gear installing plate 11, and held integrally, resulting in an accurate transmission of the rotation of the driving motor to the photo-sensitive drum 33. |
