Patent ID: 11966193
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 5:
6. A cartridge comprising:
a photosensitive drum rotatable about an axis of the photosensitive drum;
a developing roller configured to develop a latent image formed on the photosensitive drum;
a gear at least a part of which is uncovered to outside of the cartridge and faces the axis of the photosensitive drum, the gear positioned at a first side of the cartridge in an axial direction of the photosensitive drum;
a lever positioned at the first side of the cartridge and movable between a first position and a second position such that an end of the lever is movable toward and away from the gear and the axis of the photosensitive drum; and
a frame supporting the photosensitive drum, lever, and the developing roller, the frame including a projecting portion at the first side of the cartridge,
wherein the projecting portion projects away from a second side of the cartridge that is
opposite to the first side, wherein, in a pole coordinate system in a plane perpendicular to the axis, the pole coordinate system having a point of origin on the axis of the photosensitive drum, a ground line extending from the point of origin and passing through an axis of the gear, and a positive direction of an angle Θ being in a rotational moving direction of the photosensitive drum, where R1 is a distance from the axis of the photosensitive drum to a tip of a tooth of the gear when the tip of the tooth is a closest part of the gear to the axis of the photosensitive drum, and R2 is a distance from the axis of the photosensitive drum to the axis of the gear:
(i) a part of the projecting portion that is closest to the axis of the photosensitive drum is positioned at the angle Θ such that 190°<Θ<280°,
(ii) the frame includes a region in which no part of the projecting portion exists in a region downstream of the projecting portion and upstream of the gear in the rotational moving direction of the photosensitive drum,
(iii) a distance Ra from the axis of the photosensitive drum to the closest part of the projecting portion satisfies R1<Ra<R2, and
(iv) when the lever is a in a third position that is between the first position and the second position, a space bordered by the gear, the projecting portion, and the lever is provided at the first side of the cartridge, with a circle contained in the space having a center on the axis of the photosensitive drum and a radius equal to R1.