US Patent 8494409 Process cartridge and image forming apparatus

A process cartridge includes a drum; a rotatable roller including a first shaft end portion and a second shaft end portion; a bearing member for rotatably supporting ends of a shaft of the rotatable roller; an urging member for urging the rotatable roller via the bearing member in a drum contact direction; a cartridge frame for rotatably supporting the drum and for movably holding the rotatable roller via the bearing member; a movable guide member movable in an axial direction of the shaft of the rotatable roller and including a first contact portion; and a fixed guide member including a second contact portion. At least one of the first contact portion and the first shaft end portion has an inclined surface inclined with respect to the axial direction of the rotatable roller, and at least one of the second contact portion and the second shaft end portion has an inclined surface inclined with respect to the axial direction of the rotatable roller.