| 摘要 |
PROBLEM TO BE SOLVED: To easily attach and detach a black developing device capable of housing a large capacity of toner by attaching and detaching a developing device by being inserted into and pulled out from a rocking guide part. SOLUTION: A dimensional play is provided between a guide rib 21BC and the inlet of a rocking guide, so that a black developing equipment can be roughly fitted to the inlet of the rocking guide, and then smoothly inserted thereto. The black developing equipment holds a shutter 21BO for protecting a developing roller. The shutter 21BO is supported in two positions by a shutter opening and closing member 21BP and a shutter shaft 21BQ. When a rotating moment is given, in this state, to the other end part of the shutter opening and closing member 21BP in a direction right-angled to the base line of a photosensitive drum, the shutter 21BO is smoothly rotated. When the black developing equipment is taken out from a device body, a rotating level is rotated and laid in horizontal posture, and the black developing equipment can be taken out only in this state. |
