Patent ID: 8472841

Claim:
A photoconductor drum support structure comprising: a photoconductor drum that is supported to rotate about a rotation axis; a drum shaft that passes through the photoconductor drum, and is disposed along the rotation axis; a first drum flange that is assembled onto a first end in the rotation axis direction of the photoconductor drum; a second drum flange that is assembled onto a second end in the rotation axis direction of the photoconductor drum, and has a fitted portion formed on the second end; a notch formed on the first end in the rotation axis direction of the drum shaft; a drum frame that retains the photoconductor drum to rotate, the drum frame including an opening that is formed on the first end in the rotation axis direction on the drum frame, and enables insertion of the first end of the drum shaft, an engaging portion that is engaged with the notch formed on the drum shaft inserted into the opening, and that regulates displacement of the drum shaft towards the second end of the drum frame, and a second end bearing portion that is formed on the second end in the rotation axis direction of the drum frame, and enables insertion of the second end portion of the drum shaft; a drum gear that is inserted into the second end bearing portion, or that is inserted into the second end of the drum frame that projects to an outer side from the second end bearing portion and is supported to rotate on the second end bearing portion, the drum gear including a fitting portion that fits into the fitted portion on the second drum flange; and a detachment prevention member that is mounted on an outer side of the rotation axis of the drum gear on the drum shaft, and that regulates displacement towards an outer side of the rotation axis of the drum shaft.