US 12,242,222 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 Dec. 18, 2023, as Appl. No. 18/542,933.
Application 18/542,933 is a division of application No. 17/407,213, filed on Aug. 20, 2021.
Application 17/407,213 is a continuation of application No. PCT/JP2020/012811, filed on Mar. 17, 2020.
Claims priority of application No. 2019-050355 (JP), filed on Mar. 18, 2019.
Prior Publication US 2024/0118657 A1, Apr. 11, 2024
Int. Cl. G03G 15/00 (2006.01); G03G 21/18 (2006.01)
CPC G03G 21/1814 (2013.01) [G03G 21/1857 (2013.01); G03G 21/186 (2013.01)] 44 Claims
OG exemplary drawing
 
1. A cartridge comprising:
a casing having a first end portion and a second end portion opposite to the first end portion;
a photosensitive drum rotatably supported by the first end portion and the second end portion of the casing; 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 positioned at the first end portion of the casing and being rotatable about an axis of the coupling,
wherein the coupling includes a guiding portion, an engaging portion, and a visor portion,
wherein the guiding portion includes a remote portion at a position that is more remote from the second end portion of the casing than the engaging portion is from the second end portion of the casing,
wherein a distance measured from the second end portion of the casing to the remote portion of the guiding portion along a direction of the axis of the coupling decreases toward downstream in a rotational direction of the coupling,
wherein the engaging portion includes a first side surface at a position upstream in the rotational direction of the coupling and a second side surface at a position downstream in the rotational direction of the coupling,
wherein at least a part of the engaging portion is more remote from the axis of the coupling along a line that is perpendicular to the axis of the coupling than the remote portion of the guiding portion is from the axis of the coupling along a line that is perpendicular to the axis of the coupling,
wherein the visor portion projects outwardly in a direction perpendicular to the axis of the coupling, and
wherein (i) the visor portion covers a space downstream of the engaging portion in the rotational direction of the coupling or (ii) the visor portion is positioned upstream of the guiding portion in the rotational direction of the coupling and adjacent to the guiding portion.