Cartridge having detection body

摘要

In a cartridge, a developing roller is configured to rotate around a first rotational axis extending in a predetermined direction and to carry developer thereon, the developing roller having a first end and a second end apart from each other in the predetermined direction, a from-first-to-second direction being defined along the predetermined direction as being directed from the first end to the second end. A developing electrode is formed of a conductive material and is configured to be electrically connected to the developing roller, the developing electrode including a main part and a protruding portion protruding from the main part in the from-first-to-second direction. A detection body is formed of an insulating material and is rotatably supported by the protruding portion, the detection body including a first opening that exposes part of the protruding portion and a covering portion covering part of the protruding portion.

主权项

1. A cartridge, comprising:
a developing roller configured to rotate around a first rotational axis extending in a predetermined direction and to carry developer thereon, the developing roller having a first end and a second end that are apart from each other in the predetermined direction, a from-first-to-second direction being defined along the predetermined direction as being directed from the first end to the second end; a developing electrode formed of a conductive material and configured to be electrically connected to the developing roller, the developing electrode including a main part and a protruding portion that protrudes from the main part in the from-first-to-second direction; and a detection body formed of an insulating material and rotatably supported by the protruding portion, the detection body including a first opening that exposes part of the protruding portion and a covering portion configured to cover part of the protruding portion, wherein the first opening is formed to extend in a rotating direction of the detection body, wherein the covering portion includes:
a first covering portion disposed in a midway of the first opening in the rotating direction of the detection body and configured to cover the protruding portion from outside in a perpendicular direction perpendicular to the predetermined direction; anda second covering portion that is configured to cover the protruding portion from outside in the predetermined direction.