| 摘要 |
A process cartridge (7) detachably mountable to an electrophotographic image-forming apparatus, comprises: an electrophotographic photosensitive drum; a drum frame including first and second sidewalls (44) extending perpendicularly to the drum at respective ends thereof; first and second positioning portions (76) extending from respective ones of said first and second sidewalls coaxially with said drum; first and second guide portions (74) provided on said drum frame for guiding the process cartridge (7) in an insertion direction relative to an image-forming apparatus; a third positioning portion (78) extending in the insertion direction from said drum frame at a leading end of said cartridge (7) with respect to said insertion direction; and a driving force receiving portion (69) for receiving a driving force from said image-forming apparatus when the cartridge is mounted thereto; wherein said third positioning portion (78) is positioned in front of said first positioning portion (76) in said insertion direction, and said driving force receiving portion (69) is positioned between the first positioning portion (76) and the third positioning portion (78) in said insertion direction, whereby said cartridge is prevented from rotating when said driving force is transmitted. |
