Patent ID: 8718512

Claim:
An image forming device comprising: a main frame; a process frame configured to be inserted into or pulled out of the main frame; and a process cartridge detachably insertable in the process frame and comprising: a photosensitive drum having a first rotation axis extending in an axial direction; a developing unit disposed adjacent to the photosensitive drum and having one end and another end with respect to the axial direction; a developing coupling provided in the one end of the developing unit for transmitting an external rotation force to the developing unit, the developing coupling having a second rotation axis extending in a direction parallel to the axial direction; and a drum shutter configured to be pivotally moved about a third rotation axis between a first position at which the drum shutter covers the photosensitive drum and a second position at which the drum shutter does not cover the photosensitive drum, the drum shutter comprising a shutter portion covering a part of the photosensitive drum at the first position, the shutter portion being in direct confrontation with the developing unit at the second position, wherein when the process cartridge is inserted in the process frame, the drum shutter is positioned at the second position whereas when the process cartridge is not inserted in the process frame, the drum shutter is positioned at the first position.