| 摘要 |
PURPOSE:To stabilize the driving of a photosensitive body, to omit an external fly wheel and to reduce the title device in size and weight by providing an inertial member arranged inside the photosensitive body so as to obtain a great moving energy. CONSTITUTION:A fixed gear 4 is provided on one edge part of the shaft 3 of the inertial member 2, while an inner gear 5 is provided on the inner periphery of a photosensitive drum 1, and three idle gears 6 are disposed between the gears 4 and 5. The shaft 7 of the idle gears 6 are supported on a fixed plate 8. By driving the photosensitive drum 1, its rotating force is transmitted to the inner gear 5, the idle gears 6, the fixed gear 4 and the shaft 3 in that order to rotate the inertial member 2. Under such constitution, the rotating force of the photosensitive drum 1 turns into the quick rotation of the inertial member 2 and is transmitted, which results in a great moving energy. Therefore, even if an external fly wheel is omitted, the drive of the photosensitive body can be stabilized to reduce the device in size and weight. |
