Patent ID: 6400914
Filing Date: 2002-06-04
Classification: F16D,G03G

Abstract:
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein said main assembly includes a motor, a main assembly rotatable driving member for receiving driving force from said motor, a twisted hole, said hole being substantially coaxial with said main assembly rotatable driving member, and a main assembly grounding contact provided in said hole, said process cartridge comprising:an electrophotographic photosensitive drum; process means actable on said photosensitive drum; a projection engageable with said twisted hole, said projection being provided at a longitudinal end of said photosensitive drum, wherein when said main assembly rotatable driving member rotates with said hole and projection engaged with each other, rotational driving force is transmitted from said rotatable driving member to said photosensitive drum through engagement between said hole and said projection, wherein said projection is provided with a plurality of engaging portions engageable to an inner surface of said hole; and a cartridge grounding contact electrically connected with said electrophotographic photosensitive drum for electrically grounding said electrophotographic photosensitive drum when said process cartridge is mounted to the main assembly of said apparatus, said cartridge grounding contact being such that it is surrounded by said engaging portions so as to be electrically connectable with said main assembly grounding contact.