The application discloses a
processing box, comprising: a shell, comprising a first shell and a second shell connected to the first shell, the shell having a first end and a second end oppositely arranged in a first direction; a photosensitive drum; a developing roller; a
coupling arranged at the first end of the shell, the
coupling being capable of receiving driving force of an imaging device and driving the photosensitive drum and the developing roller to rotate; a charging roller supported on the second shell, the charging roller being capable of charging the photosensitive drum; a
chip having a
chip electric contact surface arranged at the second end of the shell; an
electrode having an
electrode electric contact surface arranged at the second end of the shell, the
electrode being electrically connected to the charging roller; a second cleaning member supported on the shell, the second cleaning member being in contact with the charging roller; in the first direction, at least a part of the electrode
electric contact surface is closer to the first end of the shell than the
chip electric contact surface. In the application, the second cleaning member can timely remove waste developer adhered to the charging roller, which helps to improve the printing effect.