US 12,443,125 B2
Developing cartridge including movable holder for holding electrical contact surface
Shinya Kusuda, Nagoya (JP); and Yasuo Fukamachi, Nagoya (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Jun. 20, 2023, as Appl. No. 18/337,647.
Application 18/337,647 is a continuation of application No. 17/860,788, filed on Jul. 8, 2022, granted, now 11,747,749.
Application 17/860,788 is a continuation of application No. 17/218,238, filed on Mar. 31, 2021, granted, now 11,442,377, issued on Sep. 13, 2022.
Claims priority of application No. 2020-065658 (JP), filed on Apr. 1, 2020.
Prior Publication US 2023/0333498 A1, Oct. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/00 (2006.01); G03G 15/08 (2006.01); G03G 21/16 (2006.01)
CPC G03G 15/0863 (2013.01) [G03G 15/0889 (2013.01); G03G 21/1652 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A developing cartridge comprising:
a developing roller rotatable about a developing roller axis extending in a first direction;
a casing configured to accommodate developer therein;
a coupling rotatable about a coupling axis extending in the first direction, the coupling being positioned at one end of the casing in the first direction, the coupling including a coupling gear;
an idle gear being positioned at the one end of the casing, the idle gear including:
a first idle gear rotatable about an idle axis extending in the first direction, the first idle gear meshing with the coupling gear, and
a second idle gear rotatable about the idle axis together with the first idle gear, a diameter of the second idle gear being smaller than a diameter of the first idle gear, the first idle gear being positioned between the second idle gear and the one end of the casing in the first direction;
an agitator rotatable about an agitator axis extending in the first direction;
an agitator gear rotatable about the agitator axis together with the agitator, the agitator gear being positioned at the one end of the casing, the agitator gear meshing with the second idle gear;
a developing memory including an electrical contact surface; and
a holder holding the electrical contact surface, the holder being positioned at the one end of the casing, the holder being positioned farther from the one end of the casing than the agitator gear is from the one end of the casing in the first direction,
wherein at least a part of the holder is positioned within an area defined by a diameter of the agitator gear in a second direction.