Liquid discharge head, liquid discharge device, and liquid discharge apparatus

Patent metadata

Field	Value
Publication number	US-12441109-B2
Application number	US-202318197738-A
Country	US
Kind code	B2
Filing date	May 16, 2023
Priority date	Jun 9, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A liquid discharge head includes: an actuator substrate; an electromechanical transducer held by the actuator substrate; a damper; and a damper holding substrate holding the damper, wherein the damper disposed between the actuator substrate and the damper holding substrate and joined to the actuator substrate and the damper holding substrate with an adhesive, the damper has a joint portion having a recess or a through hole.

First claim

The invention claimed is:

1. A liquid discharge head comprising:
an actuator substrate;
an electromechanical transducer held by the actuator substrate;
a damper; and
a damper holding substrate holding the damper,
wherein the damper is disposed between the actuator substrate and the damper holding substrate and is joined to the actuator substrate and the damper holding substrate with an adhesive, and
wherein the damper has a joint portion having a recess or a through hole.

2. The liquid discharge head according to claim 1 ,
wherein one of the actuator substrate and the damper holding substrate has a first recessed portion in a first facing region facing the joint portion of the damper.

3. The liquid discharge head according to claim 2 ,
wherein another of the actuator substrate and the damper holding substrate has a second recessed portion in a non-facing region not facing the joint portion of the damper.

4. The liquid discharge head according to claim 3 ,
wherein the second recessed portion extends to a second facing region facing the joint portion of the damper.

5. The liquid discharge head according to claim 2 ,
wherein an opening area of the through hole of the damper is larger than an area of the first recessed portion of said one of the actuator substrate and the damper holding substrate in a plane direction of the damper.

6. The liquid discharge head according to claim 1 , wherein the adhesive contains a filler.

7. The liquid discharge head according to claim 6 ,
wherein a thickness of the damper is larger than a maximum diameter of the filler.

8. The liquid discharge head according to claim 1 ,
wherein the recess or the through hole of the damper has a linear shape, a circular shape, or a polygonal shape in a plane direction of the damper.

9. The liquid discharge head according to claim 1 ,
wherein the damper includes:
an island portion bonded to the actuator substrate with the adhesive; and
a surrounding portion surrounding the island portion, the surrounding portion includes the recess or the through hole.

10. The liquid discharge head according to claim 1 ,
wherein the recess or the through hole of the damper has a tapered shape, an opening area of which decreases toward the damper holding substrate in a thickness direction of the damper.

11. The liquid discharge head according to claim 1 ,
wherein the damper has:
a compliance of 7×10−17 [m/N] or more,
a Young's modulus of 3 [GPa] or more and 200 [GPa] or less, and
a thickness of 2 [μm] or more and 10 [μm] or less.

12. The liquid discharge head according to claim 1 ,
wherein the damper includes multiple layers laminated in a thickness direction of the damper.

13. A liquid discharge device comprising multiple liquid discharge heads including the liquid discharge head according to claim 1 .

14. A liquid discharge apparatus comprising:
the liquid discharge head according to claim 1 ; and
a conveyor configured to convey a medium onto which a liquid is discharged from the liquid discharge head.

15. The liquid discharge head according to claim 1 , wherein:
the joint portion includes the through hole, and
the damper holding substrate has a first recessed portion in a first facing region facing the joint portion of the damper, the first recessed portion extending partially into the damper holding substrate and being aligned with the through hole of the joint portion.

16. A liquid discharge head comprising:
an actuator substrate;
an electromechanical transducer held by the actuator substrate;
a damper; and
a damper holding substrate holding the damper,
wherein the damper is disposed between the actuator substrate and the damper holding substrate and is joined to the actuator substrate and the damper holding substrate with an adhesive, and
wherein the actuator substrate includes a recess in a facing region facing the damper.

17. A liquid discharge bead comprising:
an actuator substrate;
an electromechanical transducer held by the actuator substrate;
a damper; and
a damper holding substrate holding the damper,
wherein the damper is disposed between the actuator substrate and the damper holding substrate and is joined to the actuator substrate and the damper holding substrate with an adhesive,
wherein the damper has a joint portion having a recess or a through hole,
wherein one of the actuator substrate and the damper holding substrate has a first recessed portion in a first facing region facing the joint portion of the damper, and
wherein another of the actuator substrate and the damper holding substrate has a second recessed portion in a non-facing region not facing the joint portion of the damper.

Assignees

• Masuda Toshiaki
• HIRABAYASHI Takuma
• Ricoh Co Ltd

Inventors

• Masuda Toshiaki
• HIRABAYASHI Takuma

Classifications

• B41J2/14112

  Resistive element · CPC title

• B41J2/14314

  Structure of ink jet print heads with electrostatically actuated membrane · CPC title

• B41J2002/14258

  Multi layer thin film type piezoelectric element · CPC title

• B41J2202/20

  Modules · CPC title

• B41J2/1623

  bonding and adhesion · CPC title