Drum unit, cartridge and coupling member
AssigneeCanon Kabushiki Kaisha
InventorsTetsuo Uesugi, Makoto Hayashida, Koji Yamaguchi, Takashi Yano
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Abstract
A drum unit for a cartridge includes a photosensitive drum and a coupling member rotatable about a rotational axis thereof, the coupling member being operatively connected to the photosensitive drum. The coupling member includes a movable extended portion that extends in a first direction, and a projection projecting from the extended portion in a second direction that crosses the first direction, the projection being capable of transmitting a driving force to the photosensitive drum. At least a part of the projection is positioned inside of the photosensitive drum.
Claims30
A drum unit for a cartridge, the drum unit comprising:
- (i) a photosensitive drum;
- and
- (ii) a coupling member rotatable about a rotational axis thereof, the coupling member being operatively connected to the photosensitive drum, and the coupling member including:
- (ii-i) an extended portion that extends in a first direction, the extended portion being movable relative to a part of the coupling member from which the extended portion extends;
- and
- a projection projecting from the extended portion in a second direction that crosses the first direction and is toward the rotational axis of the coupling member such that at least a part of the projection is closer to the rotational axis of the coupling member than the extended portion is to the rotational axis of the coupling member, the projection being capable of transmitting a driving force to the photosensitive drum,
- wherein at least a part of the projection is positioned inside of the photosensitive drum.
A cartridge comprising:
- (i) a casing;
- (ii) a photosensitive drum rotatably supported by the casing;
- and
- (iii) a coupling member rotatable about a rotational axis thereof, the coupling member being operatively connected to the photosensitive drum, and the coupling member including:
- (iii-i) an extended portion that extends in a first direction, the extended portion being movable relative to a part of the coupling member from which the extended portion extends;
- and
- a projection projecting from the extended portion in a second direction that crosses the first direction and is toward the rotational axis of the coupling member such that at least a part of the projection is closer to the rotational axis of the coupling member than the extended portion is to the rotational axis of the coupling member, the projection being capable of transmitting a driving force to the photosensitive drum,
- wherein at least a part of the projection is positioned inside of the photosensitive drum.
A process cartridge comprising:
- (i) a casing;
- (ii) toner contained in the casing;
- (iii) a photosensitive drum rotatably supported by the casing;
- (iv) a developing roller configured to develop a latent image on the photosensitive drum with the toner;
- and
- (v) a coupling member rotatable about a rotational axis thereof, the coupling member being operatively connected to the photosensitive drum, and the coupling member including:
- (v-i) an extended portion that extends in a first direction, the extended portion being movable relative to a part of the coupling member from which the extended portion extends;
- and
- a projection projecting from the extended portion in a second direction that crosses the first direction and is toward the rotational axis of the coupling member such that at least a part of the projection is closer to the rotational axis of the coupling member than the extended portion is to the rotational axis of the coupling member, the projection being capable of transmitting a driving force to the photosensitive drum,
- wherein at least a part of the projection is positioned inside of the photosensitive drum.
Dependencies are inferred from the claim text.