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

Patent metadata

Field	Value
Publication number	US-12311663-B2
Application number	US-202318116323-A
Country	US
Kind code	B2
Filing date	Mar 2, 2023
Priority date	Mar 15, 2022
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A liquid discharge head includes a piezoelectric element configured to vibrate; a damper configured to reduce vibration energy generated by the piezoelectric element; a first substrate joined to the damper, the first substrate having a first space facing one surface of the damper vibrates; a second substrate opposite to the first substrate via the damper, the second substrate having: a recess accommodating the piezoelectric element, and a second space facing another surface of the damper, the second space disposed opposite to the first space via the damper and a leg between the damper and the second substrate the leg joined to the second substrate with an adhesive including a filler.

First claim

The invention claimed is:

1. A liquid discharge head comprising:
a piezoelectric element to vibrate;
a damper to reduce vibration energy generated by the piezoelectric element;
a first substrate joined to the damper, the first substrate having a first space facing one surface of the damper;
a second substrate opposite to the first substrate via the damper, the second substrate having:
a recess accommodating the piezoelectric element, and
a second space facing another surface of the damper, the second space disposed opposite to the first space via the damper; and

a leg between the damper and the second substrate, the leg joined to the second substrate with an adhesive including a filler.

2. The liquid discharge head according to claim 1 , wherein;
the first substrate includes a first partition wall forming the first space,
the second substrate includes a second partition wall forming the second space, and
the leg is between the damper and the second partition wall.

3. The liquid discharge head according to claim 2 , wherein:
each of a width of the first partition wall and a width of the leg is narrower than a width of the second partition wall.

4. The liquid discharge head according to claim 2 , wherein;
a width of the leg is wider than each of a width of the first partition wall and a width of the second partition wall.

5. The liquid discharge head according to claim 4 , wherein;
the width of the first partition wall is narrower than the width of the second partition wall.

6. The liquid discharge head according to claim 5 , wherein;
the width of the leg increases toward the damper.

7. The liquid discharge head according to claim 1 , wherein;
a height of the leg is larger than a maximum diameter of the filler.

8. The liquid discharge head according to claim 1 , wherein;
the leg comprises silicon having a Young's modulus of 100 GPa or more.

9. The liquid discharge head according to claim 1 , wherein;
at least one of joined surfaces between the second substrate and the leg has an uneven portion.

10. The liquid discharge head according to claim 1 , wherein;
the damper has a compliance of 7E-17 or more, a Young's modulus of 3 to 200 GPa, and a thickness of 2 to 10 μm.

11. The liquid discharge head according to claim 1 , wherein;
the damper has a laminated structure including multiple layers.

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

13. A liquid discharge apparatus comprising:
the liquid discharge device according to claim 12 , and
a conveyor to convey a medium to a position facing the liquid discharge device.

14. A liquid discharge apparatus comprising:
the liquid discharge head according to claim 1 , and
a conveyor to convey a medium to a position facing the liquid discharge head.

15. A liquid discharge head comprising:
a piezoelectric element to vibrate;
means for reducing vibration energy generated by the piezoelectric element;
a first substrate joined to the means for reducing vibration energy, the first substrate having a first space facing one surface of the means for reducing vibration energy;
a second substrate opposite to the first substrate via the means for reducing vibration energy, the second substrate having:
a recess accommodating the piezoelectric element, and
a second space facing another surface of the means for reducing vibration energy, the second space disposed opposite to the first space via the means for reducing vibration energy; and

a leg between the means for reducing vibration energy and the second substrate, the leg joined to the second substrate with an adhesive including a filler.

16. The liquid discharge head according to claim 15 , wherein:
the first substrate includes a first partition wall forming the first space,
the second substrate includes a second partition wall forming the second space, and
the leg is between the means for reducing vibration energy and the second partition wall.

17. The liquid discharge head according to claim 16 , wherein:
each of a width of the first partition wall and a width of the leg is narrower than a width of the second partition wall.

18. The liquid discharge head according to claim 16 , wherein:
a width of the leg is wider than each of a width of the first partition wall and a width of the second partition wall.

19. The liquid discharge head according to claim 18 , wherein:
the width of the first partition wall is narrower than the width of the second partition wall.

20. The liquid discharge head according to claim 19 , wherein:
the width of the leg increases toward the means for reducing vibration energy.

Assignees

• Nagahashi Kazuto
• HIRABAYASHI Takuma
• Miwa Keishi
• Matsuda Yukimasa
• Ricoh Co Ltd

Inventors

• Nagahashi Kazuto
• HIRABAYASHI Takuma
• Miwa Keishi
• Matsuda Yukimasa

Classifications

• B41J2002/14241

  having a cover around the piezoelectric thin film element · CPC title

• B41J2202/19

  Assembling head units · CPC title

• B41J2002/14362

  Assembling elements of heads · CPC title

• B41J2/055

  Devices for absorbing or preventing back-pressure · CPC title

• B41J2/14201

  Structure of print heads with piezoelectric elements · CPC title