| 摘要 |
A hopper-integrated type developing unit for image forming apparatus is disclosed. The unit comprises a case, a supply roller, a developing roller, a photosensitive drum, a supply roller retaining shaft, a developing roller retaining shaft, two photosensitive drum retaining shafts, driving gears and removal restricting means. The case consists of a body and side plates. The supply roller, the developing roller and the photosensitive roller are accommodated in the case. The supply roller retaining shaft pierces the supply roller and is rotatably held by the side plates of the case at its both ends. The developing roller retaining shaft pierces the developing roller and is rotatably held by the side plates of the case at its both ends. Two photosensitive drum retaining shafts are respectively fixed to side plates at its inner ends and respectively inserted into an interior of the photosensitive drum at its outer ends. The driving gears are respectively fitted around the retaining shafts. The removal restricting means allows the supply roller retaining shaft and the developing roller retaining shaft to be combined with and removed from the side plate of the case only at one engagement state of the driving gears.
|
