US 12,032,330 B2
Cartridge, drum unit and image forming apparatus
Toshiki Fujino, Kanagawa (JP); Akinobu Hirayama, Shizuoka (JP); Teruhiko Sasaki, Shizuoka (JP); Tachio Kawai, Tokyo (JP); Daisuke Abe, Shizuoka (JP); 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 Nov. 16, 2022, as Appl. No. 17/988,064.
Application 17/988,064 is a division of application No. 17/986,997, filed on Nov. 15, 2022.
Application 17/988,064 is a division of application No. PCT/JP2021/035213, filed on Sep. 16, 2021.
Claims priority of application No. 2020-156549 (JP), filed on Sep. 17, 2020.
Prior Publication US 2023/0074264 A1, Mar. 9, 2023
Int. Cl. G03G 21/18 (2006.01); G03G 15/00 (2006.01)
CPC G03G 21/1814 (2013.01) [G03G 15/757 (2013.01); G03G 21/186 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cartridge comprising:
a photosensitive drum;
a casing having a first end portion and a second end portion opposite the first end portion in an axial direction of the photosensitive drum, the casing rotatably supporting the photosensitive drum; and
a coupling positioned adjacent to the first end portion of the casing, the coupling being operatively connected to the photosensitive drum so as to be capable of transmitting a driving force toward the photosensitive drum,
wherein the coupling includes:
a first wall,
a second wall provided inside the first wall in a radial direction of the coupling,
a groove portion defined by the first wall and the second wall,
a recessed portion provided in the second wall, and
an inclined portion adjacent to the recessed portion,
wherein, as measured in the radial direction of the coupling, at least a part of the inclined portion is more remote from an axis of the coupling than the recessed portion is from the axis of the coupling,
wherein one of sides of the recessed portion in a circumferential direction of the coupling is open, and on an other side of the recessed portion in the circumferential direction at least a part of the inclined portion is provided,
wherein, as measured in the axial direction of the photosensitive drum, the inclined portion is inclined such that a first end of the inclined portion in the circumferential direction is farther from the second end portion of the casing than a second end of the inclined portion in the circumferential direction is from the second end portion of the casing, with the second end of the inclined portion being closer in the circumferential direction to the recessed portion than the first end of the inclined portion is to the recessed portion, and
wherein at least a part of the recessed portion and at least a part of the inclined portion are positioned in the groove portion.