Patent ID: 8374523

Claim:
A developing cartridge comprising: a frame; a developer carrying member that is rotatably supported on the frame and carries a developer, the developer carrying member having a first rotational axis defining an axial direction; a developer supplying member that is rotatably supported on the frame and contacts the developer carrying member to supply the developer to the developer carrying member, the developer supplying member having a second rotational axis parallel to the first rotational axis, both of the first rotational axis and the second rotational axis lying in a first plane; and an electrode member that is provided on the frame, the electrode member having a U-shape and forming a ridge line, the electrode member being configured to receive an electrical power from an external power supplying member, the electrode member having a contact portion that is configured to contact with the external power supplying member, the contact portion having a linear shape and lying in an imaginary plane that extends parallel to the first rotational axis, the contact portion being at an apex of the U-shape of the electrode member, the first plane intersecting with the imaginary plane at an angle between 45 degrees and 90 degrees, the imaginary plane including the ridge line.