Patent ID: 8644732
Filing Date: 2014-02-04
Classification: G03G,Y10T

Abstract:
1. A photosensitive drum unit to which a coupling member is mountable, the coupling member including (1) a rotational force receiving portion for receiving a rotational force at one end portion side thereof, (2) a spherical portion at another end portion side thereof, and (3) a projected portion projected from the spherical portion, said photosensitive drum unit comprising: a cylinder provided with a photosensitive portion at a peripheral surface thereof; a drum flange provided at one end portion of said cylinder and including (A) a hole portion which opens outwardly in a longitudinal direction of said cylinder and which has an opening capable of accommodating the spherical portion, (B) a groove portion which continues from said hole portion and which is capable of accommodating the projected portion, and (C) a limiting portion for limiting inward movement of the spherical portion in the longitudinal direction of said cylinder; and a closing member capable of partially covering said opening of said hole portion and mounted to said drum flange to limit outward movement of the spherical portion in the longitudinal direction of said cylinder, wherein said closing member is constituted by a plurality of independent pieces.