US 12,145,377 B2
Liquid ejection apparatus
Hiroshi Koshikawa, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 28, 2022, as Appl. No. 17/955,021.
Claims priority of application No. 2021-176488 (JP), filed on Oct. 28, 2021.
Prior Publication US 2023/0139685 A1, May 4, 2023
Int. Cl. B41J 2/175 (2006.01)
CPC B41J 2/17566 (2013.01) [B41J 2/17513 (2013.01); B41J 2002/17576 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A liquid ejection apparatus comprising:
a liquid ejection head configured to eject a liquid; and
a plurality of storage units configured to store a liquid to be supplied to the liquid ejection head;
each of the storage units comprising:
a pivot member immersed in a stored liquid and pivotally movable according to an amount of the liquid;
a detection unit configured to detect an amount of the liquid using the pivot member,
wherein a pivot position of the pivot member comprised in each of the storage units differs according to a specific gravity of a liquid stored in each of the storage units;
wherein the pivot member comprises:
a float which is lower in specific gravity than a liquid stored in the storage unit and is pivotally supported in the storage unit; and
a detection target portion which is provided on the float via an arm portion and is detectable by the detection unit,
the float is pivotally supported at one end in an extending direction of the float,
the float comprised in each of the storage units is supported at a position closer to the one end as a specific gravity of a liquid stored in the storage unit decreases,
wherein the float has a plurality of hole sections arranged in parallel in the extending direction at the one end, and
the float is pivotally supported using one hole section of the hole sections according to a specific gravity of a stored liquid.