Patent ID: 8548353

Claim:
A developer cartridge for detachable connection with a photosensitive unit that includes a photosensitive drum, the developer cartridge comprising: a toner cartridge; a developer stirring device, located in the toner cartridge; a developer roller, for developing an electrostatic latent image on the photosensitive drum; a supply roller, for supplying developer to the developer roller; and a gear set for driving said developer stirring device, developer roller and supply roller, the gear set including a power receptor for receiving power, wherein the power receptor is rotatably fixable at two or more predetermined positions, an initial position of the power receptor is a power receiving position, and a power receptor moving device comprises a press block, a baffle block, a spring, and a torsion spring, the power receptor moving device is controlled by the press block, and when the press block of the power receptor moving device is pressed downwards, the power receptor is rotated to another power receiving position due to action of the torsion spring.