Patent ID: 7386253

Claim:
A developer cartridge, comprising: a frame including a first side wall and a second side wall, the first side wall and the second side wall extending substantially in a length direction; a developer housing section for housing a developer, the developer housing section extending from the first side wall to the second side wall in a width direction substantially perpendicular to the length direction; a developer supplying section for supplying the developer to a photosensitive member, the developer supplying section extending from the first side wall to the second side wall in the width direction and housing a developer carrying member, the developer carrying member including a developer carrying member shaft and a developer carrying member body supported on the developer carrying member shaft, the developer carrying member shaft extending in the width direction and being rotatably supported by the first side wall and the second side wall; a developer electrode for electrically biasing the developer carrying member, at least a portion of the developer electrode disposed at the first side wall; an input gear for supplying a driving force for rotating the developer carrying member, the input gear being rotatably supported at the first side wall; and a first gear member for transmitting a driving force to the developer carrying member, the first gear member being engaged with the input gear and being fixedly supported by an end portion of the developer carrying member shaft projecting outwardly from the first side wall.