Coupling part, photosensitive drum, process cartridge and...

G - Physics – 03 – G

Patent

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Details

G03G 5/00 (2006.01) F16D 1/10 (2006.01) G03G 15/00 (2006.01) G03G 21/00 (2006.01) G03G 21/16 (2006.01) G03G 21/18 (2006.01)

Patent

CA 2216857

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor, a hole defined by twisted surfaces, the hole being substantially coaxial with the gear, and a main assembly side grounding contact provided in the hole, the process cartridge includes an electrophotographic photosensitive drum; process means actable on the photosensitive drum; and a projection engageable with the twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein when the main assembly side gear rotates with the hole and projection engaged with each other, rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection; and a cartridge side grounding contact electrically connected with the electrophotographic photosensitive drum for electrically grounding the electrophotographic photosensitive drum when the process cartridge is mounted to the main assembly of the apparatus, the cartridge side grounding contact being provided on the projection so as to be electrically connectable with the main assembly side grounding contact.

Une cartouche de traitement amovible d'un ensemble principal d'un appareil de formation d'image électrophotographique, qui comprend un engrenage latéral pour recevoir la force d'entraînement d'un moteur, une ouverture définie par des surfaces torsadées, ouverture essentiellement coaxiale à l'engrenage et un contact de masse latéral de l'ensemble principal dans l'ouverture. La cartouche de traitement est formée d'un tambour photosensible électrophotographique; de solutions de traitement agissant sur le tambour photosensible; et d'une projection s'engageant dans les surfaces torsadées; la projection se trouve à une extrémité longitudinale du tambour photosensible. Quand l'engrenage latéral de l'ensemble principal tourne, l'ouverture et la projection étant engagées l'un dans l'autre, la force de rotation est transmise de l'engrenage au tambour photosensible par la liaison entre l'ouverture et la projection; un contact de masse latéral de la cartouche est connecté électriquement au tambour photosensible électrophotographique quand la cartouche est montée dans l'ensemble principal de l'appareil. Le contact de masse latéral de la cartouche a été prévu sur la projection pour être connecté électriquement au contact de masse latéral de l'ensemble principal.

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