| 摘要 |
PURPOSE:To obtain a simple structure which is low in manufacture cost by inserting a fixed member provided to a component and engaging it with an attachable and detachable positioning part provided to a main device side, and controlling mutual positions of components. CONSTITUTION:A fixed shaft 3 is inserted into the mounting notch 5 of a unit frame 4 where a cleaning device 12 is fixed to mount a photosensitive drum 1 and then a developing device 6 is supported by its suspension shaft 9 and the hook 10 of the unit frame 4. Then, fixed shafts 3, 8, and 11 are inserted into positioning notches 14-16 of the mounting frame 17 of the main device side 13 and a door 18 is closed lastly to mount the unit consisting of the photosensitive drum, developing device, and cleaning device on the main device body by pressing it by the positioning notches 19 and 20 of control pieces 21 and 22. The unit is disassembled in the reverse way.
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