US 11,951,740 B2
Liquid ejecting head and liquid ejecting apparatus
Shotaro Tamai, Matsumoto (JP); Takahiro Katakura, Okaya (JP); Takanori Aimono, Matsumoto (JP); Yuta Okawa, Matsumoto (JP); and Hitoshi Takaai, Azumino (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jan. 25, 2022, as Appl. No. 17/648,891.
Claims priority of application No. 2021-011737 (JP), filed on Jan. 28, 2021.
Prior Publication US 2022/0234354 A1, Jul. 28, 2022
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/14233 (2013.01) [B41J 2/14274 (2013.01); B41J 2002/14306 (2013.01); B41J 2002/14338 (2013.01); B41J 2202/11 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A liquid ejecting head comprising:
a pressure chamber substrate in which a first pressure chamber and a second pressure chamber adjacent to the first pressure chamber in a first direction are provided;
a communication plate in which are provided
a first communication channel communicating with the first pressure chamber and the second pressure chamber and
a first common liquid chamber communicating with the first pressure chamber and the second pressure chamber at positions different from positions at which the first communication channel communicates with the first pressure chamber and the second pressure chamber; and
a nozzle substrate in which a first nozzle communicating with the first pressure chamber and the second pressure chamber in common via the first communication channel is provided, wherein
a second communication channel communicating with the first common liquid chamber and communicating with the first pressure chamber and the second pressure chamber in common is provided in the pressure chamber substrate or the communication plate, and wherein
the first communication channel includes
a first portion interposed between the first pressure chamber and the first nozzle, and
a second portion interposed between the second pressure chamber and the first nozzle at a position away from the first portion, and wherein
A<B+C, wherein
A is a sum of sectional areas of openings of the second communication channel opening toward the first pressure chamber and the second pressure chamber,
B is a sectional area of an opening of the first portion opening toward the first pressure chamber, and
C is a sectional area of an opening of the second portion opening toward the second pressure chamber.