US 12,105,444 B2
Image forming apparatus capable of suppressing increase in size
Junichi Hashimoto, Toyohashi (JP); Yuwen Wang, Nagoya (JP); Takuya Amaike, Iwakura (JP); Soun Kanada, Iwakura (JP); and Kazuma Hinoue, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Apr. 13, 2023, as Appl. No. 18/299,745.
Application 18/299,745 is a continuation of application No. 17/213,464, filed on Mar. 26, 2021, granted, now 11,650,522.
Claims priority of application No. 2020-066232 (JP), filed on Apr. 1, 2020.
Prior Publication US 2023/0244159 A1, Aug. 3, 2023
Int. Cl. G03G 15/08 (2006.01); G03G 15/09 (2006.01)
CPC G03G 15/0891 (2013.01) [G03G 15/0921 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A drum unit comprising:
a first photosensitive drum rotatable about a first axis extending in a first direction;
a second photosensitive drum rotatable about a second axis extending in the first direction;
a first side wall positioned at one end of the first photosensitive drum in the first direction, the first side wall supporting both of the first photosensitive drum and the second photosensitive drum, the first side wall being made of metal;
a first resin wall being positioned at the one end of the first photosensitive drum, the first resin wall being made of resin;
a second resin wall being positioned at another end of the first photosensitive drum, the second resin wall being made of resin; and
a developing unit comprising:
a magnetic roller rotatable about a third axis extending in the first direction, the magnetic roller facing a surface of the first photosensitive drum;
a developer container configured to accommodate carrier;
a first auger positioned in the developer container and rotatable about a fourth axis extending in the first direction, the first auger being configured to circulate the toner and the carrier in the developer container; and
a second auger positioned in the developer container and rotatable about a fifth axis extending in the first direction, the second auger being configured to convey the toner and the carrier to the magnetic roller,
wherein the first side wall and the photosensitive drum are positioned between the first resin wall and the second resin wall in the first direction.