US 12,393,134 B2
Movable member and image forming apparatus
Kazutaka Sueshige, Shizuoka (JP); and Daisuke Abe, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 7, 2024, as Appl. No. 18/598,049.
Application 18/598,049 is a division of application No. 18/321,168, filed on May 22, 2023, granted, now 11,988,974.
Application 18/321,168 is a division of application No. 17/475,672, filed on Sep. 15, 2021, granted, now 11,703,774, issued on Jul. 18, 2023.
Claims priority of application No. 2020-173317 (JP), filed on Oct. 14, 2020.
Prior Publication US 2024/0319631 A1, Sep. 26, 2024
Int. Cl. G03G 15/02 (2006.01); G03G 15/04 (2006.01); G03G 15/08 (2006.01)
CPC G03G 15/0225 (2013.01) [G03G 15/0291 (2013.01); G03G 15/0409 (2013.01); G03G 15/0872 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A drum unit configured to be mountable on a main assembly of an image forming apparatus, and movable to the main assembly in a state in which a plurality of developing cartridges including developing rollers are mounted thereon, the drum unit comprising:
a frame;
a plurality of photosensitive drums including a first photosensitive drum rotatably supported by the frame;
a charging wire extending along a rotational axial direction of the first photosensitive drum and configured to electrically charge a surface of the first photosensitive drum; and
a cleaning member configured to be movable between an end portion of the frame on one side with respect to the rotational axial direction and an end portion of the frame on the other side with respect to the rotational axial direction along the charging wire in the rotational axial direction, and configured to clean the charging wire by moving while being in contact with the charging wire,
wherein when the cleaning member is positioned at the end portion of the one side, of the plurality of the developing cartridges, a first developing cartridge corresponding to the first photosensitive drum is configured to be mountable on the drum unit,
wherein the cleaning member includes:
a base portion;
a cleaning portion projected downward from the base portion in a case in which the drum unit takes a mounted attitude of being mounted on the main assembly and configured to contact and clean the charging wire; and
a plurality of projected portions projected upward from the base portion in the mounted attitude and including a first projected portion which is projected highest from the base portion, and
wherein an entirety of the first projected portion is provided at a position different from the cleaning portion in the rotational axial direction and the first projected portion is provided on a side close to the end portion of the frame on the one side relative to the cleaning portion in the rotational axial direction.