ELECTROPHOTOGRAPHIC PHOTOSENSITIVE DRUM UNIT, CARTRIDGE, AND FLANGE MEMBER

摘要

A flange member includes a first cylindrical portion, a second cylindrical portion disposed inside the first cylindrical portion coaxially with the first cylindrical portion, an inwardly protruding portion protruding from an inner circumference of the second cylindrical portion, a first wall extending in the central axis direction and connecting the first cylindrical portion and the second cylindrical portion together and is in contact with a shaft member between the first wall and the second wall to receive a driving force, a second wall opposed to the first wall, and a connecting portion connecting the first cylindrical portion and the second cylindrical portion and connecting the first wall and the second wall. A groove is provided inside the first cylindrical portion and outside the second cylindrical portion. The connecting portion is disposed adjacent to the inwardly protruding portion with respect to the shaft member in the central axis direction.

主权项

1. An electrophotographic photosensitive drum unit comprising:
an electrophotographic photosensitive drum; a coupling member configured to rotate when subjected to a driving force; a shaft member configured to rotate when subjected to the driving force from the coupling member; and a flange member secured to the electrophotographic photosensitive drum, the flange member being configured to rotate when subjected to the driving force from the shaft member, wherein the flange member comprises:
a first cylindrical portion;a second cylindrical portion disposed inside the first cylindrical portion in such a manner that a central axis is coaxial with the first cylindrical portion;an inwardly protruding portion protruding from an inner circumference of the second cylindrical portion and restricting a position of the coupling member in a central axis direction of the first cylindrical portion;a first wall extending in the central axis direction and connecting the first cylindrical portion and the second cylindrical portion together, the first wall being in contact with the shaft member to receive the driving force;a second wall extending in the central axis and connecting the first cylindrical portion and the second cylindrical portion together, the second wall being opposed to the first wall; anda connecting portion connecting the first cylindrical portion and the second cylindrical portion together and connecting the first wall and the second wall together, wherein a groove is provided inside the first cylindrical portion and outside the second cylindrical portion, wherein the coupling member is held in the second cylindrical portion so as to be capable of tilting, wherein the shaft member is disposed between the first wall and the second wall, and wherein the connecting portion is disposed adjacent to the inwardly protruding portion with respect to the shaft member in the central axis direction.