US 12,443,126 B2
Image forming apparatus and developing cartridge
Yu Fukasawa, Tokyo (JP); Yukio Kubo, Tokyo (JP); Daisuke Abe, Suntou-gun (JP); Mitsuhiro Sato, Akishima (JP); Masahiro Suetsugu, Kawasaki (JP); and Kengo Sakai, Yokohama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 23, 2024, as Appl. No. 18/781,110.
Application 18/781,110 is a continuation of application No. 18/243,792, filed on Sep. 8, 2023, granted, now 12,228,866.
Application 18/243,792 is a continuation of application No. 17/530,601, filed on Nov. 19, 2021, granted, now 11,789,378.
Application 17/530,601 is a continuation of application No. 16/928,076, filed on Jul. 14, 2020, granted, now 11,204,566.
Claims priority of application No. 2019-132086 (JP), filed on Jul. 17, 2019; application No. 2019-135189 (JP), filed on Jul. 23, 2019; application No. 2019-139129 (JP), filed on Jul. 29, 2019; application No. 2019-172221 (JP), filed on Sep. 20, 2019; and application No. 2020-098379 (JP), filed on Jun. 5, 2020.
Prior Publication US 2024/0377772 A1, Nov. 14, 2024
Int. Cl. G03G 15/08 (2006.01); G03G 21/16 (2006.01)
CPC G03G 15/0863 (2013.01) [G03G 21/1676 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A developing cartridge unit comprising:
a developing cartridge attachable to and detachable from an apparatus main body of an image forming apparatus; and
a cover member detachably attached to the developing cartridge,
wherein the developing cartridge includes:
a housing configured to accommodate developer;
a developing roller including a shaft portion and a developer bearing portion which is provided on an outside of the shaft portion in a radial direction of the shaft portion and which is configured to bear the developer accommodated in the housing, the developing roller being configured to be rotatable about a rotation axis extending in a first direction, the developer bearing portion including an exposed portion exposed to an outside of the developing cartridge;
a memory which is provided at a first end portion of the developing cartridge opposite to a second end portion of the developing cartridge in the first direction and which has an electrical contact portion exposed to the outside of the developing cartridge; and
a coupling configured to receive a driving force from the apparatus main body for rotating the developing roller, the coupling being provided at the first end portion of the developing cartridge and being provided between the developing roller and the electrical contact portion in a second direction in which the developing roller and the electrical contact portion are aligned when viewed in the first direction,
wherein the cover member includes:
a first cover portion extending in the first direction so as to cover the exposed portion of the developer bearing portion of the developing roller from a side of the first end portion to a side of the second end portion of the developing cartridge; and
a second cover portion connected to the first cover portion on the side of the first end portion of the developing cartridge and extending, on the side of the first end portion of the developing cartridge, in the second direction so as to cover both the coupling and the electrical contact portion.