| 摘要 |
PROBLEM TO BE SOLVED: To easily attach and detach a black developing device capable of housing a large capacity of toner by making a developing device attachable to and detachable from a rocking guide part by insertion or pulling, and opening and closing a shutter according to the attaching and detaching operation. SOLUTION: When a black developing equipment 21B is inserted to a device body, a rotating lever is rotated and set so that the posture is horizontal. An insert port is entirely opened. A user horizontally support the black developing equipment 21B and inserts it to the insert port. A dimensional play is provided between a guide rib and the inlet of a rocking guide, so that the black developing equipment can be smoothly inserted by roughly fitting it to the inlet and pressing it to the deep side. A shutter for protecting a developing roller 21BS is held by the black developing equipment 21B. When the insertion of the blade developing equipment 21B is continued, the other end part of a shutter opening and closing member is moved along an inclined surface. According to this structure, the shutter can be opened and closed in interlocking to the insertion of the black developing equipment 21B. |
