| 摘要 |
PURPOSE:To prevent a poor contact of an earth contact point by making a bearing and a position regulating pin conductive and simultaneously, providing the earthing contact point coming into contact with the position regulating pin which is not rotated, on a device main body side. CONSTITUTION:The conductive rotary shaft 1b of a photosensitive drum unit is attachably/detachably supported on a conductive unit case 13, by an insulating bearing 1a, and an insulating position regulating pint 14 provided on the conductive unit case 13 is fitted into a position regulating hole 15 provided on the side of the device main body 10. Then, positioning is carried out by a developing unit provided on the side of the device main body 10, etc., and simultaneously, the conductive rotary shaft 1b of the photosensitive drum unit is earthed together with the earthing contact point 11 provided on the side of the device main body 10. Thus, the number of faults caused by the abrasion of the earthing contact point 11 can be reduced, the life of an image forming device is prolonged, and the reliability of operation can be greatly improved. |
