Patent ID: 8364058

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 pivotably 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 an operating portion abuttable on the process frame during insertion of the process cartridge into the process frame; and a shutter portion covering the 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 the drum shutter is configured to be moved from the second position to the first position in accordance with the abutment of the operating portion and the process frame; wherein the second rotation axis and the third rotation axis are coaxial with each other.