| 主权项 |
1. An electrophotographic photoreceptor, which is removably installed and used in a device main unit of an electrophotography application device so as to form a process cartridge, the device main unit including a driving-side power transmission portion, the electrophotographic photoreceptor comprising:
a photosensitive drum including a cylindrical conductive base having an outer peripheral face that has a photosensitive layer containing a photoconductive material; and a flange, which is fitted to an end portion of the photosensitive drum, including a driven-side driving force transmission portion, the flange for transmitting with the driven-side driving force transmission portion a rotational driving force from the driving-side power transmission portion to the photosensitive drum, the driven-side driving force transmission portion having
a cylindrical member protruding from a face of the flange that is disposed on a side of the flange to receive the rotational driving force, a center of the cylindrical member being disposed on a central axis of the photosensitive drum, andengaging protrusions which are disposed parallel to the central axis at positions on an outer periphery of the cylindrical member that trisect the cylindrical member, each protrusion protruding in a radial direction to engage the driving-side power transmission portion, each protrusion further having a tip end that is a semicircular conical projection. |
