Liquid ejection nozzle and liquid ejection device

Patent metadata

Field	Value
Publication number	US-12337337-B2
Application number	US-202217657102-A
Country	US
Kind code	B2
Filing date	Mar 29, 2022
Priority date	Mar 31, 2021
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A liquid ejection nozzle that has a nozzle hole and ejects a liquid from the nozzle hole in a ejection direction toward a target subject includes a nozzle plate having the nozzle hole, and a pressing member having a through hole having a diameter larger than a diameter of the nozzle hole at a position corresponding to the nozzle hole in the ejection direction and configured to press the nozzle plate from a downstream side in the ejection direction.

First claim

What is claimed is:

1. A liquid ejection nozzle that has a nozzle hole and ejects a liquid from the nozzle hole in an ejection direction toward a target subject, the liquid ejection nozzle comprising:
a nozzle plate having the nozzle hole; and
a pressing member having a through hole having a diameter larger than a diameter of the nozzle hole at a position corresponding to the nozzle hole in the ejection direction, wherein
the pressing member is configured to press the nozzle plate from a downstream side in the ejection direction,
a surface of the nozzle plate on the ejection direction is in contact with a surface of the pressing member on a side opposite to the ejection direction,
a length of the through hole corresponds to a thickness of the pressing member in the ejection direction, and
the diameter of the through hole is equal to or less than the thickness of the pressing member.

2. The liquid ejection nozzle according to claim 1 , wherein the nozzle plate has a plurality of nozzle holes including the plurality of nozzle hole.

3. The liquid ejection nozzle according to claim 2 , wherein the through hole is provided corresponding to each of the plurality of nozzle holes.

4. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 3 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

5. The liquid ejection nozzle according to claim 2 , wherein the through hole is provided corresponding to the plurality of nozzle holes.

6. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 4 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

7. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 2 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

8. The liquid ejection nozzle according to claim 1 , wherein the pressing member is configured to be attached to and detached from the nozzle plate.

9. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 5 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

10. The liquid ejection nozzle according to claim 1 , wherein the pressing member includes a resin.

11. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 6 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

12. The liquid ejection nozzle according to claim 1 , wherein the through hole of the pressing member is subjected to a liquid repellent treatment against the liquid.

13. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 7 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

14. A liquid ejection device, comprising: the liquid ejection nozzle according to claim 1 ; and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

15. The liquid ejection device according to claim 14 , wherein the liquid supply device is configured to feed the liquid to the liquid ejection nozzle using a gas pressure.

16. The liquid ejection nozzle according to claim 1 , wherein
a relation in which the liquid does not come into contact with the through hole of the pressing member is expressed by Equation 1:
θ<tan−1((( L 2 −L 1)/2)/ T 2)  Equation 1, where

θ is an inclination angle representing a maximum deviation of the ejection direction from a specific ejection direction in the liquid ejection nozzle,
L 1 is the diameter of the nozzle hole,
L 2 is the diameter of the through hole, and
T 2 is the thickness of the pressing member in the ejection direction.

17. The liquid ejection nozzle according to claim 16 , wherein a tip end portion of the through hole is chamfered.

Assignees

• Seiko Epson Corp

Inventors

• Abe Tomoki
• Katsuda Osamu

Classifications

• B05B7/0416

  with arrangements for mixing one gas and one liquid · CPC title

• B65D83/753

  characterised by details or accessories associated with outlets · CPC title

• B05B1/14 Primary

  with multiple outlet openings (B05B1/02, B05B1/26 take precedence); with strainers in or outside the outlet opening · CPC title

• A61B17/3203

  Fluid jet cutting instruments · CPC title

• B05B9/04

  with pressurised or compressible container (aerosol containers B65D83/14); with pump · CPC title