| 摘要 |
An electrical contact part supplies a bias voltage to a developing roller usable in a process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus. The apparatus includes an electrophotographic photosensitive member, a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive member, an electroconductive flange engaged to one end portion of the developing roller, and a driving portion, provided at on end portion of the flange, for rotating the developing roller. The electrical contact part includes (a) a connecting portion electrically connectable with a cartridge-side electrode which is provided in the process cartridge and which is connectable with a main assembly side electrode provided in the main assembly of the apparatus when the process cartridge is detachably mounted to the main assembly of the apparatus; and (b) a projected portion projected at a side opposite from a side at which the connecting portion is connectable to the cartridge side electrode and insertable to between the flange and the driving portion.
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