Patent ID: 8886109

Claim:
A cleaning unit, comprising: a rotatable photosensitive drum; a cleaning member configured to remove toner from the photosensitive drum; and a frame configured to support the photosensitive drum and the cleaning member, wherein the cleaning member includes: an elastic member which abuts against the photosensitive drum; and a support member configured to support the elastic member, wherein the support member has frame abutment portions which abut against the frame at both end portions of the support member in a direction along a direction of a rotation axis of the photosensitive drum, respectively, wherein each of the frame abutment portions has: a first abutment portion formed by a surface extending in one direction; and a second abutment portion formed by a surface extending in another direction intersecting with the one direction, the first abutment portion being directed to a side opposite to a side of the photosensitive drum with respect to a first axis extending from a corresponding one of the frame abutment portions to the elastic member as viewed in the direction of the rotation axis of the photosensitive drum, the second abutment portion being directed to a side opposite to a side of the elastic member with respect to a second axis substantially orthogonal to the first axis, wherein the frame includes cleaning member support portions which abut against the frame abutment portions at both the end portions of the support member, respectively, wherein each of the cleaning member support portions has: a first support portion which abuts against the first abutment portion; and a second support portion which abuts against the second abutment portion, the cleaning member support portions supporting the cleaning member in a pivotable manner about the frame abutment portions as a pivot axis, and wherein the cleaning unit further comprises an urging member configured to urge the cleaning member in a direction in which the elastic member is brought into contact with the photosensitive drum by pivoting the cleaning member about the frame abutment portions as the pivot axis.