Developing cartridge with a bent blade holder of a doctor blade element

A developing cartridge, comprising:

• a housing for accommodating toner,
• a developing roller rotatably mounted in the housing,
• a doctor blade element in contact with the developing roller, and
• a driving device located at a longitudinal end of the housing;
• wherein the driving device comprises a driving force input member and a developing roller gear, wherein the developing roller gear is located at an end of the developing roller;
• the driving force input member comprises a driving force receiving part and a first driving gear combined with the driving force receiving part, wherein a diameter of the first driving gear is larger than a diameter of the driving force receiving part, and the first driving gear is meshed with the developing roller gear;
• the doctor blade element is in contact with an outer surface of the developing roller to adjust a thickness of a toner layer on the outer surface of the developing roller;
• the doctor blade element comprises a blade holder and a blade, wherein the blade holder and the blade are combined;
• the blade holder is fixedly mounted on the housing, and the blade holder comprises a first part and a second part, wherein blade holder is bent between the first part and the second part such that a bent part of the blade holder is formed between the first part and the second part, and the blade is fixed on the second part;
• the blade is abutted against the outer surface of the developing roller;
• and when viewed along a longitudinal direction of the developing cartridge, the driving force receiving part does not overlap with the blade and the bent part, and the first driving gear overlaps with the first part of the blade holder.