US 11,872,813 B2
Liquid discharge head and actuator
Masanori Mikoshiba, Shimosuwa-machi (JP); Motoki Takabe, Shiojiri (JP); and Masaki Mori, Shiojiri (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Dec. 22, 2021, as Appl. No. 17/558,757.
Claims priority of application No. 2020-216430 (JP), filed on Dec. 25, 2020.
Prior Publication US 2022/0203683 A1, Jun. 30, 2022
Int. Cl. B41J 2/14 (2006.01); B41J 2/045 (2006.01); H10N 30/20 (2023.01)
CPC B41J 2/14201 (2013.01) [B41J 2/04581 (2013.01); H10N 30/20 (2023.02); B41J 2002/14491 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A liquid discharge head comprising:
piezoelectric elements;
a vibrating plate disposed at a position below the piezoelectric elements in a first direction; and
a pressure chamber plate disposed at a position below the vibrating plate in the first direction, the pressure chamber plate having a partition wall defining pressure chambers, wherein
in the respective pressure chambers, when one of two positions in a second direction intersecting the first direction is defined as a first position and the other position is defined as a second position from which the shortest distance to the partition wall is shorter than the shortest distance from the first position to the partition wall,
the vibrating plate has a first portion corresponding to the first position and a second portion corresponding to the second position,
a surface of the first portion in the first direction is, in the first direction, closer than below a surface of the second portion in the first direction,
a thickness of the first portion in the first direction is greater than a thickness of the second portion in the first direction.