Patent ID: 7526228
Filing Date: 2009-04-28
Classification: G03G

Abstract:
1. A developer cartridge detachably attachable to a casing of an image carrier unit detachably attachable to an image forming apparatus body, the developer cartridge including: a developing roller; and a first rotation body that rotates the developing roller by coupling to a second rotation body provided in the image forming apparatus body, in a state where the developer cartridge is attached in the casing, wherein the first rotation body is configured to advance and retract with respect to a side wall of the casing which extends along an attachment/detachment direction of the developer cartridge, and is normally urged in an advance direction, and a downstream end portion of the first rotation body in the advance direction is arranged downstream in the advance direction from an upstream end of the side wall in the advance direction, in the state where the developer cartridge is attached in the casing.