Patent ID: 9594328
Date: 2017-03-14
CPC Classifications: G03G

Claim:
1. A developer cartridge comprising: a developing roller configured to rotate about a rotational axis; a coupling member configured to rotate about an axis upon receipt of a drive force from an outside of the developer cartridge, the axis extending along the rotational axis; a housing provided with a first protruding part that extends in an axial direction, along which the rotational axis of the developing roller extends, the first protruding part being configured such that when the developer cartridge is mounted in an apparatus body of an image forming apparatus, the first protruding part contacts a sensing body provided in the apparatus body of the image forming apparatus, the sensing body being configured such that when the first protruding part contacts the sensing body, the sensing body rotates from a first sensing-body position to a second sensing-body position; and a detection gear configured to rotate about a first axis in response to rotation of the coupling member, the first axis extending along the rotational axis, the detection gear being provided with a second protruding part that extends in the axial direction, the second protruding part being configured such that in a state where the developer cartridge is mounted in the apparatus body of the image forming apparatus, when the detection gear rotates, the second protruding part contacts the sensing body disposed at the second sensing-body position, wherein in the state where the developer cartridge is mounted in the apparatus body of the image forming apparatus, a distance defined in the axial direction between the housing and a portion of the sensing body that contacts the second protruding part is greater than another distance defined in the axial direction between the housing and another portion of the sensing body that contacts the first protruding part.