Liquid discharge head and liquid discharge apparatus

Patent metadata

Field	Value
Publication number	US-12415353-B2
Application number	US-202318389222-A
Country	US
Kind code	B2
Filing date	Nov 14, 2023
Priority date	Nov 17, 2022
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A liquid discharge head includes a nozzle plate, a first housing, a valve body, and a second housing. The nozzle plate has a nozzle from which a liquid is dischargeable. The first housing has a first face fixed to the nozzle plate and has a liquid chamber communicating with the nozzle to supply the liquid to the nozzle. The valve body is movable between a liquid supply position and a liquid block position in a valve moving direction. The second housing is disposed over a second face of the first housing opposite to the first face in the valve moving direction. The second housing is deformable relative to the first housing. The second housing includes a fixing portion to be secured to a support of a liquid discharge apparatus to support the liquid discharge head.

First claim

The invention claimed is:

1. A liquid discharge head comprising:
a nozzle plate having a nozzle from which a liquid is dischargeable;
a first housing having a first face fixed to the nozzle plate and having a liquid chamber communicating with the nozzle to supply the liquid to the nozzle;
a valve body movable between a liquid supply position and a liquid block position in a valve moving direction, the valve body;
at the liquid supply position separated from the nozzle to allow the liquid flowing from the liquid chamber to the nozzle; and
at the liquid block position contacting the nozzle to block the liquid flowing from the liquid chamber to the nozzle; and

a second housing over a second face of the first housing opposite to the first face in the valve moving direction, the second housing:
deformable relative to the first housing; and
including a fixing portion to be secured to a support of a liquid discharge apparatus to support the liquid discharge head.

2. The liquid discharge head according to claim 1 , further comprising a third housing opposite the first housing via the second housing in the valve moving direction, the third housing including a holder holding the valve body,
wherein the first housing and the second housing are fastened to the third housing, and
the second housing is deformable relative to the third housing.

3. The liquid discharge head according to claim 2 , further comprising a mover secured to the third housing, the mover to support and move the valve body.

4. The liquid discharge head according to claim 1 , further comprising a fastening screw to fasten the first housing and the second housing to each other,
wherein the fastening screw is closer to a center of the second housing than the fixing portion in a planar direction of the second face of the first housing orthogonal to the valve moving direction.

5. The liquid discharge head according to claim 2 , further comprising a fastening screw to fasten the first housing, the second housing, and the third housing to each other,
wherein the fastening screw is closer to a center of the second housing than the fixing portion in a planar direction of the second face of the first housing orthogonal to the valve moving direction.

6. The liquid discharge head according to claim 1 , further comprising an elastic member between the first housing and the second housing, the elastic member to relieve stress applied to the first housing.

7. The liquid discharge head according to claim 2 , further comprising:
a first elastic member between the first housing and the second housing, the first elastic member to relieve stress applied to the first housing; and
a second elastic member between the second housing and the third housing, the second elastic member to relieve stress applied to the third housing.

8. The liquid discharge head according to claim 1 ,
wherein the second housing has a projection projecting from a side face of the first housing in a planar direction of the second face of the first housing orthogonal to the valve moving direction, and
the projection includes the fixing portion.

9. The liquid discharge head according to claim 1 ,
wherein the fixing portion is disposed on a side face of the second housing orthogonal to the second face of the first housing orthogonal to the valve moving direction.

10. The liquid discharge head according to claim 1 ,
wherein the first housing has an opening in a region overlapping with the fixing portion of the second housing in the valve moving direction.

11. A liquid discharge apparatus comprising:
the liquid discharge head according to claim 1 ;
a carriage movable in a direction orthogonal to the valve moving direction, the carriage including the support to which the liquid discharge head is detachably attached; and
a liquid supply device to supply the liquid to the liquid discharge head.

12. A liquid discharge head comprising:
a nozzle plate having a nozzle from which a liquid is dischargeable;
a first housing having a first face fixed to the nozzle plate and having a liquid chamber communicating with the nozzle to supply the liquid to the nozzle;
a valve body movable between a liquid supply position and a liquid block position in a valve moving direction, the valve body:
at the liquid supply position separated from the nozzle to allow the liquid flowing from the liquid chamber to the nozzle; and
at the liquid block position contacting the nozzle to block the liquid flowing from the liquid chamber to the nozzle;

a second housing over a second face of the first housing opposite to the first face in the valve moving direction, the second housing including a fixing portion to be secured to a support of a liquid discharge apparatus to support the liquid discharge head; and
a third housing opposite the first housing via the second housing in the valve moving direction, the third housing including a holder holding the valve body,
wherein the first housing and the second housing are fastened to the third housing, and
the second housing is deformable relative to the first housing and the third housing.

13. The liquid discharge head according to claim 12 , further comprising an elastic member between the second housing and the third housing, the elastic member to relieve stress applied to the third housing.

14. The liquid discharge head according to claim 13 , further comprising another elastic member between the first housing and the second housing to relieve stress applied to the first housing.

Assignees

• Matsufuji Ryohta
• Ricoh Co Ltd

Inventors

• Matsufuji Ryohta

Classifications

• B41J2/17596 Primary

  Ink pumps, ink valves · CPC title

• B41J2002/14362

  Assembling elements of heads · CPC title

• B41J3/4073

  Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects (B41J3/283, B41J3/286 take precedence; building up a 3D object using individual droplets from jetting heads B29C64/112) · CPC title

• B41J2/14201 Primary

  Structure of print heads with piezoelectric elements · CPC title