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

Claim 0:
1. 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, the lever, and the development roller,
wherein the frame includes a first projecting portion and a second projecting portion at the first side of the cartridge, and the first projecting portion and the second projecting portion project away from a second side of the cartridge that is opposite to the first side,
wherein the second projecting portion is positioned downstream of the first projecting portion and upstream of the gear in a rotational moving direction of the photosensitive drum,
wherein the second projecting portion is positioned farther from the axis of the photosensitive drum than the first projecting portion is positioned from the axis of the photosensitive drum,
wherein, in a pole coordinate system in a plane perpendicular to the axis of the photosensitive drum, 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 the 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 where R2 is a distance from the axis of the photosensitive drum to the axis of the gear:
a part of the first projecting portion that is closest to the axis of the photosensitive drum is positioned at the angle Θ such that 190°<Θ<280° in the pole coordinate system, and a distance Ra from the axis of the photosensitive drum to the closest part of the first projecting portion satisfies R1<Ra<R2, and when the lever is in a third position that is between the first position and the second position, a space bordered by the gear, the first projecting portion, the second 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.