Drum cartridge including electrical contact surface positioned at outer surface of drum frame
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsKoji Abe, Naoya Kamimura
Life of this patent
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Abstract
A drum cartridge includes: a drum frame to which a developing cartridge is attachable; a photosensitive drum; and a first storage medium. The drum frame has one end portion and another end portion spaced apart from the one end portion in a first direction. The photosensitive drum is rotatable about a first axis extending in a second direction and is positioned at the one end portion of the drum cartridge. The first storage medium includes a first electrical contact surface. The first storage medium is positioned at an outer surface of the drum frame, the outer surface being exposed in a state where the developing cartridge is attached to the drum frame.
Claims19
A process cartridge comprising:
- a drum cartridge including:
- a drum frame having one end portion and another end portion spaced apart from the one end portion in a first direction;
- a photosensitive drum rotatable about a first axis extending in a second direction, the photosensitive drum being positioned at the one end portion of the drum frame in the first direction;
- and
- a first storage medium including a first electrical contact surface;
- and
- a developing cartridge detachably attachable to the drum frame, the developing cartridge including:
- a developing roller rotatable about a second axis extending in the second direction;
- and
- a second storage medium including a second electrical contact surface,
- wherein the drum frame includes:
- a first drum side plate;
- a second drum side plate spaced apart from the first drum side plate in the second direction, the photosensitive drum being positioned between the first drum side plate and the second drum side plate in the second direction;
- and
- a connecting plate connecting the first drum side plate and the second drum side plate in the second direction, the connecting plate being positioned at the another end portion of the drum frame in the first direction,
- wherein the first electrical contact surface is positioned closer to the first drum side plate than to the second drum side plate in the second direction, and the first electrical contact surface is positioned closer to the connecting plate than the photosensitive drum is to the connecting plate in the first direction, and
- wherein, in a state where the developing cartridge is attached to the drum cartridge, the second electrical contact surface is positioned closer to the first drum side plate than to the second drum side plate in the second direction, and the second electrical contact surface is positioned closer to the connecting plate than the photosensitive drum is to the connecting plate in the first direction.
Dependencies are inferred from the claim text.