Patent ID: 8655221

Claim:
A cartridge comprising: a casing; a rotatable member rotatably supported by the casing; a protruding member configured to advance and retract in directions parallel to an axis of rotation of the rotatable member; and an urging member configured to urge the protruding member to advance in an advancing direction, wherein the protruding member has a particular sloping surface configured to be contacted by a driving member of an apparatus body in a direction orthogonal to an axis of rotation of the protruding member when the cartridge is mounted into the apparatus body, and the particular sloping surface slopes with respect to directions parallel to and orthogonal to the axis of rotation of the protruding member, wherein the rotatable member comprises a cylindrical flange member disposed at one end thereof, wherein the protruding member comprises an inserted portion configured to be inserted into the flange member, wherein the inserted portion comprises a ridge disposed on an outer surface thereof, the ridge extending in the advancement direction, and wherein the ridge is twisted in a direction of rotation of the protruding member, and wherein the flange member has a groove formed in an inner surface therein, and the ridge is configured to be fitted into the groove.