US 12,109,825 B2
Head unit and liquid ejecting apparatus
Haruki Kobayashi, Matsumoto (JP); and Taiki Hanagami, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Nov. 3, 2022, as Appl. No. 17/979,798.
Claims priority of application No. 2021-180016 (JP), filed on Nov. 4, 2021.
Prior Publication US 2023/0134366 A1, May 4, 2023
Int. Cl. B41J 29/377 (2006.01); B41J 29/13 (2006.01)
CPC B41J 29/377 (2013.01) [B41J 29/13 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A head unit configured to eject a liquid, comprising:
a circuit substrate for driving the head unit;
a casing including a cover for defining an accommodation space that accommodates the circuit substrate; and
a flow passage member of which a part is disposed in the casing, including a flow passage coupling portion for coupling to a flow passage member outside the head unit, wherein
the cover has an intake port for sucking air from an outside of the cover to the accommodation space and an exhaust port for exhausting the air passing through the accommodation space, and
the flow passage coupling portion is disposed outside the casing and disposed closer to the intake port than to the exhaust port.