Patent ID: 8295734

Claim:
A device for an transmitting a rotational force to an electrophotographic photosensitive drum, comprising: a rotational force receiving member connectable with the drum and having a rotational axis; and a coupling member, the coupling member including a driven side portion having a rotational axis and a connecting portion coupling the driven side portion with the rotational force receiving member, the connecting portion being inclinable relative to the rotational force receiving member such that the rotational axis of the driven side portion is inclinable relative to the rotational axis of the rotational force receiving member, wherein the driven side portion includes a first projection projecting from the connecting portion along a line that crosses the rotational axis of the driven side portion, and the first projection is provided with at least one second projection projecting from an outermost portion of the first projection in a direction away from the connecting portion, along a line substantially parallel to the rotational axis of the driven side portion, and wherein a tip of the second projection is defined by at least one slanted surface.