US 12,257,839 B2
Head chip, liquid jet head, and liquid jet recording device
Hitoshi Nakayama, Chiba (JP)
Assigned to SII PRINTEK INC., Chiba (JP)
Filed by SII Printek Inc., Chiba (JP)
Filed on Dec. 13, 2022, as Appl. No. 18/080,534.
Claims priority of application No. 2021-206360 (JP), filed on Dec. 20, 2021.
Prior Publication US 2023/0191783 A1, Jun. 22, 2023
Int. Cl. B41J 2/14 (2006.01); B41J 2/16 (2006.01)
CPC B41J 2/14201 (2013.01) [B41J 2/161 (2013.01); B41J 2002/14362 (2013.01); B41J 2002/14491 (2013.01); B41J 2/1623 (2013.01); B41J 2/1642 (2013.01); B41J 2202/18 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A head chip comprising:
a flow channel member in which a plurality of pressure chambers containing liquid is arranged in a state of being partitioned by a partition wall;
an actuator plate which is stacked on the flow channel member in a state of being opposed in a first direction to the pressure chambers, and which has a polarization direction set to the first direction; and
drive electrodes which are respectively formed on a first surface and a second surface of the actuator plate, the first surface facing to a first side in the first direction, and the second surface facing to a second side as an opposite side to the first side, and which are configured to deform the actuator plate in the first direction so as to respectively change volumes of the pressure chambers, wherein
the drive electrodes include
a first electrode disposed on the first surface of the actuator plate so as to overlap at least one of the pressure chamber and the partition wall when viewed from the first direction,
a second electrode which is disposed on the first surface of the actuator plate so as to be adjacent to the first electrode, and which is configured to generate a potential difference from the first electrode, and
first opposed electrode which is individually disposed on the second surface of the actuator plate at a position opposed to the first electrode, and which is configured to generate a potential difference from the first electrode, wherein
the drive electrodes include a second opposed electrode which is opposed to the second electrode on the second surface, and which is disposed so as to be adjacent to the first opposed electrode,
the second opposed electrode is configured to generate a potential difference in the first direction from the second electrode, and is configured to generate a potential difference in a direction crossing the first direction from the first opposed electrode,
the first surface of the actuator plate is arranged so as to be opposed in the first direction to the flow channel member, and
a whole of the second electrode is disposed at a position overlapping the partition wall when viewed from the first direction.