US 12,145,376 B2
Liquid ejection apparatus
Akane Hisanaga, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 23, 2022, as Appl. No. 17/952,014.
Claims priority of application No. 2021-162737 (JP), filed on Oct. 1, 2021.
Prior Publication US 2023/0107578 A1, Apr. 6, 2023
Int. Cl. B41J 2/175 (2006.01)
CPC B41J 2/17566 (2013.01) [B41J 2002/17576 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A liquid ejection apparatus comprising:
a retention chamber configured to retain liquid;
a turning member located in the retention chamber and configured to turn about a shaft portion in accordance with a height of a liquid surface of the liquid retained in the retention chamber; and
a sensor unit configured to detect turning of the turning member,
wherein
the turning member includes
a float portion having a lower specific gravity than the liquid retained in the retention chamber and
a detected portion located above the float portion and detected by the sensor unit, and
a liquid holding portion formed to extend to the shaft portion from at least one of a side surface portion and a bottom surface portion of the float portion and configured to be capable of holding the liquid retained in the retention chamber, and
in a case where the liquid surface of the liquid retained in the retention chamber is at or below a predetermined height, the liquid holding portion touches the liquid surface of the liquid retained in the retention chamber to maintain the height of the liquid surface near the shaft portion to a height where the shaft portion is located.