| 摘要 |
PURPOSE:To make the diameter of a photosensitive drum smaller and to maintain a developing interval or a focal distance with high accuracy by positioning both of driving and supporting rollers on the outer peripheral side of the photosensitive drum. CONSTITUTION:The driving roller 11 and the supporting rollers 12 and 13 are disposed on the outer peripheral side of the photosensitive drum 1, and no one is inserted in the inner peripheral side thereof. Since only necessary minimum means such as an exposing means and a destaticizing means are inserted in the drum 1, the diameter of the drum 1 is made smaller. Then, a rocking roller is disposed on an opposite side to a developing position and a pair of rollers 12 and 13 executes pressure receiving/position holding by two-point support on both sides in the peripheral direction of the developing position, so that the positional accuracy of the drum that the exposing focal distance and the developing interval influence image distinctness is maintained. |
