US 12,405,566 B2
Electrophotographic image forming apparatus, cartridge and drum unit
Masanari Morioka, Kanagawa (JP); Takeo Kawanami, Kanagawa (JP); and Yu Fukasawa, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 20, 2021, as Appl. No. 17/407,213.
Application 17/407,213 is a continuation of application No. PCT/JP2020/012811, filed on Mar. 17, 2020.
Claims priority of application No. JP2019-050355 (JP), filed on Mar. 18, 2019.
Prior Publication US 2021/0382434 A1, Dec. 9, 2021
Int. Cl. G03G 21/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 21/1814 (2013.01) [G03G 21/1857 (2013.01); G03G 21/186 (2013.01)] 89 Claims
OG exemplary drawing
 
52. A cartridge comprising:
a casing;
a photosensitive drum supported by the casing, the photosensitive drum being rotatable in a rotational direction about a rotational axis; and
a coupling operatively connected to the photosensitive drum so as to be capable of transmitting a driving force to the photosensitive drum, the coupling being rotatable in the rotational direction about the rotational axis, the coupling including:
a first surface configured to receive the driving force, the first surface extending away from the photosensitive drum in a direction of the rotational axis,
a second surface configured to receive a braking force that opposes the driving force, the second surface being positioned downstream of the first surface in the rotational direction, the second surface extending in a direction (i) away from the photosensitive drum and (ii) inclined relative to the direction that the first surface extends away from the photosensitive drum, and
a third surface extending about the rotational axis between a position upstream of the first surface in the rotational direction to a position adjacent to the second surface,
wherein a distance from an end of the photosensitive drum to the third surface in the direction of the rotational axis decreases along the third surface in the rotational direction, and
wherein a distance, measured along a line that is perpendicular to the rotational axis, from the rotational axis to at least a part of the third surface that is upstream of the first surface is less than a distance, measured along a line that is perpendicular to the rotational axis, from the rotational axis to a part of the second surface that is farthest from the rotational axis.