Patent ID: 7532839

Claim:
A process cartridge comprising: an image holding member capable of holding a developing agent image thereon; a shaft that supports the image holding member; a bearing portion that receives the shaft, the bearing portion including a shaft insertion portion through which the shaft is inserted, the bearing portion having at least two protrusions; a charging device that is capable of charging the image holding member; a first frame that supports the bearing portion and the charging device; and a second frame that is provided separately from the first frame, the second frame receiving the bearing portion and configured with holes corresponding to the protrusions on the bearing portion, wherein the first frame and the bearing portion sandwich the second frame when the first frame is assembled with the second frame, wherein the protrusions on the bearing portion are biased against the second frame and fit in the corresponding holes in the second frame to fix the first frame and the second frame to each other when the first frame is assembled with the second frame, and wherein the protrusions are located symmetrically with respect to the shaft insertion portion.