Image forming apparatus including endless belt disposed above photosensitive drum

摘要

An image forming apparatus includes a frame, a photosensitive drum, an endless belt disposed above the photosensitive drum, and a pressing member. The photosensitive drum includes a drum body and a flange portion that is provided on one end portion of the drum body. The flange portion has a contacted portion and a pressed portion. The pressing member presses the pressed portion upward to permit the photosensitive drum to be in contact with the endless belt. The frame has a positioning portion disposed above the pressing member and above the photosensitive drum. The positioning portion is configured to be in contact with the contacted portion and to position the photosensitive drum when the pressing member presses the pressed portion. The pressed portion is disposed farther from the drum body in an axial direction of the photosensitive drum than the contacted portion.

主权项

1. An image forming apparatus comprising:
a frame; a first photosensitive drum having a rotational axis extending in an axial direction, the first photosensitive drum being configured to rotate about the rotational axis, the first photosensitive drum including a drum body and a first flange portion, the drum body having one end portion in the axial direction, the first flange portion being provided on the one end portion of the drum body, and the first flange portion having a first contacted portion and a first pressed portion; an endless belt disposed above the first photosensitive drum; and a first pressing member configured to press the first pressed portion upward to permit the first photosensitive drum to be in contact with the endless belt, wherein the frame has a first positioning portion disposed above the first pressing member and above the first photosensitive drum, the first positioning portion being configured to be in contact with the first contacted portion and to position the first photosensitive drum when the first pressing member presses the first pressed portion, and wherein the first pressed portion is disposed farther from the drum body in the axial direction than the first contacted portion.