US 12,366,817 B2
Developing cartridge including protrusion positioned at outer surface of casing
Yasuo Fukamachi, Nagoya (JP); Kazuna Taguchi, Nagoya (JP); and Takuya Kanda, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Feb. 2, 2024, as Appl. No. 18/431,080.
Application 18/431,080 is a continuation of application No. 18/177,485, filed on Mar. 2, 2023, granted, now 11,934,113.
Application 18/177,485 is a continuation of application No. 17/698,378, filed on Mar. 18, 2022, granted, now 11,635,708, issued on Apr. 25, 2023.
Application 17/698,378 is a continuation of application No. 17/178,377, filed on Feb. 18, 2021, granted, now 11,327,418, issued on May 10, 2022.
Application 17/178,377 is a continuation of application No. 16/745,632, filed on Jan. 17, 2020, granted, now 10,928,750, issued on Feb. 23, 2021.
Application 16/745,632 is a continuation of application No. 16/239,708, filed on Jan. 4, 2019, granted, now 10,551,768, issued on Feb. 4, 2020.
Application 16/239,708 is a continuation of application No. 15/845,210, filed on Dec. 18, 2017, granted, now 10,222,724, issued on Mar. 5, 2019.
Application 15/845,210 is a continuation of application No. 15/380,544, filed on Dec. 15, 2016, granted, now 9,857,731, issued on Jan. 2, 2018.
Application 15/380,544 is a continuation of application No. PCT/JP2015/004440, filed on Sep. 1, 2015.
Claims priority of application No. 2015-022608 (JP), filed on Feb. 6, 2015.
Prior Publication US 2024/0176260 A1, May 30, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/08 (2006.01); G03G 21/16 (2006.01)
CPC G03G 15/0889 (2013.01) [G03G 15/0891 (2013.01); G03G 21/1647 (2013.01); G03G 2221/1657 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A developing cartridge comprising:
a developing roller rotatable about a first axis extending in a first direction;
a casing configured to accommodate a developer therein, the casing having a first outer surface and a second outer surface spaced apart from the first outer surface in the first direction;
a coupling rotatable about a second axis extending in the first direction, the coupling being positioned at the first outer surface, the coupling including a coupling gear;
an idle gear rotatable about an idle axis extending in the first direction according to rotation of the coupling, the idle gear being positioned at the first outer surface, the idle gear including a large-diameter gear and a small-diameter gear, a diameter of the small-diameter gear being smaller than a diameter of the large-diameter gear;
a first gear rotatable about a first gear axis extending in the first direction, the first gear being positioned at the first outer surface, the first gear including a first gear part and a second gear part, a first diameter of the first gear part being larger than a second diameter of the second gear part;
a partially toothless gear including gear teeth and a toothless part, the partially toothless gear being rotatable about a partially toothless gear axis extending in the first direction, the partially toothless gear being positioned at the first outer surface;
a cam movable in the first direction relative to the partially toothless gear in a state where the cam is in contact with the partially toothless gear; and
a detection protrusion extending in the first direction, the detection protrusion being movable according to movement of the cam.