Patent ID: 8594526

Claim:
A developing cartridge comprising: a housing, which accommodates developer therein, the housing including: a first sidewall and a second sidewall, which is opposed to the first sidewall; a developing roller, which is received by the first sidewall and the second sidewall, and is rotatable about a first axis line; a coupling, which is disposed at the first sidewall, and is rotatable about a second axis line parallel with the first axis line, wherein the coupling transfers rotational force to the developing roller, the rotational force being input by an outside drive input part, which advances and retreats, with respect to the first sidewall, in a direction along the second axis line; and a moving member extending so that the moving member connects the first and second sidewalls and received so that the moving member can be moved along the advancing and retreating direction of the drive input part, wherein the moving member includes: a pushing part at the first sidewall, which is pushed toward the second sidewall by a pushing force from the drive input part, and an electrode part at the second sidewall, which applies developing bias to the developing roller, and wherein if the pushing part is pushed by the pushing force of the drive input part, the moving member moves toward the second sidewall, so that the electrode part protrudes more from the second sidewall than before the pushing part was pushed.