| 摘要 |
PROBLEM TO BE SOLVED: To easily attach a cartridge to an appropriate position of an apparatus body without damaging a photoreceptor drum and a developing sleeve during attachment/detachment of the cartridge.SOLUTION: A guide member 218 is provided on an apparatus body, and a guide rib 214 is provided in a drum cartridge 270. The guide rib 214 includes a second rib part 214b at an intermediate part having a thickness larger than the thicknesses of a first rib part 214a on the depth side in an insertion direction and a third rib part 214c on the front side in the insertion direction. The thickness of the second rib part 214b is slightly smaller than the groove width of a guide groove 219. When the second rib part 214b fits to the guide groove 219, the drum cartridge 270 can hardly move to a developing cartridge 220 side. Thus, the drum cartridge 270 can be attached to the apparatus body without damaging a photoreceptor drum 210 and a developing sleeve 211. When the third rib part 214b fits to the guide groove 219, the drum cartridge 270 is appropriately attached to the apparatus body while the developing sleeve 211 is in proximity with the photoreceptor drum 210.SELECTED DRAWING: Figure 19 |
