Processing unit including developing roller having roller body and covering layer covering circumferential surface of roller body, and supporting member that supports developing roller

摘要

A processing unit is provided. The processing unit includes: a housing; a developing roller that carries developer on a surface thereof, the developing roller including, a roller body, and a covering layer covering an outer circumferential surface of the roller body; a photosensitive drum that contacts the developing roller, wherein an end face of the photosensitive drum at a first side in an axial direction of the developing roller is located at an outer side in the axial direction compared to an end face of the developing roller at the first side in the axial direction, and wherein the developer on the developing roller is supplied to the photosensitive drum; and a supporting member that contacts an inner circumferential surface of the roller body at the first side in the axial direction, and supports the developing roller rotatably in the housing.