Patent ID: 7369792

Claim:
A developer cartridge, comprising: a frame including a first side wall, a second side wall, and a third side wall, the first side wall and the second side wall extending substantially in a length direction, and the third side wall extending from the first side wall to the second side wall substantially in a width direction perpendicular to the 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 the width 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 that extends in the width direction and is rotatably supported by the first side wall and the second side wall; at least one projecting portion; and an input gear positioned on the first side wall; wherein: the developer housing section and the developer supplying section are adjacent to one another in the length direction; the developer supplying section includes a front end adjoining the developer housing section and a back end furthest from the front end in the length direction, the back end including an opening; each of the first side wall, the second side wall, and the third side wall includes a portion adjacent to the opening; the developer carrying member includes an exposed portion extending beyond the back end through the opening in the length direction; the at least one projecting portion is located above the developer carrying member and extends from the frame beyond the back end substantially in the length direction, the at least one projecting portion is provided integrally on the frame; the developer carrying member is rotatable about a first axis; the input gear is rotatable about a second axis parallel to the first axis; the at least one projecting portion includes a contact portion configured to contact a portion of a photosensitive member cartridge when the developer cartridge is attached to the photosensitive member cartridge; and the contact portion is closer to the first axis than to the second axis.