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

Patent metadata

Field	Value
Publication number	US-9505214-B2
Application number	US-201514750077-A
Country	US
Kind code	B2
Filing date	Jun 25, 2015
Priority date	Jun 27, 2014
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A liquid discharge head includes a plurality of nozzles to discharge liquid droplets; a plurality of individual liquid chambers to which the plurality of nozzles communicates; a common liquid chamber, to supply a liquid to the plurality of individual liquid chambers, including a wall disposed opposite a side of an individual liquid chamber and formed of a deformable damper; a frame forming the common liquid chamber and a damper chamber disposed opposite the common liquid chamber with the damper in between, in which the frame accommodates a damper member including the damper and includes a concave portion that serves as the damper chamber; and an opening opposite the damper and a support member to support the damper member, in which the opening and the support member is disposed on a bottom of the concave portion facing the common liquid chamber.

First claim

What is claimed is:

1. A liquid discharge head comprising:
a plurality of nozzles to discharge liquid droplets;
a plurality of individual liquid chambers to which the plurality of nozzles communicates;
a common liquid chamber, to supply a liquid to the plurality of individual liquid chambers, including a wall disposed opposite a side of an individual liquid chamber and formed of a deformable damper;
a frame forming the common liquid chamber and a damper chamber disposed opposite the common liquid chamber with the damper in between,
wherein the damper chamber is a concave portion within a space bounded by the frame, and the concave portion accommodates a damper member including the damper.

2. The liquid discharge head as claimed in claim 1 , wherein the damper member comprises a damper forming member to form the damper in a recoverably deformable manner to form the wall of the common liquid chamber, and a holder member to hold the damper forming member.

3. The liquid discharge head as claimed in claim I, wherein the frame comprises a joint tube disposed at a longitudinal center of the common liquid chamber and forming a part of a plurality of supply tubes to supply the liquid to the common liquid chamber from outside.

4. The liquid discharge head as claim in claim 1 , wherein the frame comprises a joint tube disposed at one longitudinal end of the common liquid chamber and forming a part of a plurality of supply tubes to supply the liquid to the common liquid chamber from outside.

5. The liquid discharge head as claimed in claim 1 , wherein the damper member comprises:
a damper forming member to form the damper in a recoverably deformable manner to form the wall of the common liquid chamber; and
a holder member to hold the damper forming member and forming the damper chamber disposed opposite the common liquid chamber with the damper in between.

6. A liquid discharge device comprising the liquid discharge head as claimed in claim 1 .

7. The liquid discharge device as claimed in claim 6 , wherein the liquid discharge head is integrally formed with at least one of a head tank to store a liquid to be supplied to the liquid discharge head, a carriage to mount the liquid discharge head thereon, a supply unit to supply the liquid to the liquid discharge head, a maintenance unit to maintain the liquid discharge head, and a main scan moving unit to move the liquid discharge head in a main scanning direction.

8. A liquid discharge apparatus comprising the liquid discharge device as claimed in claim 6 .

9. A liquid discharge apparatus comprising the liquid discharge head as claimed in claim 1 .

10. The liquid discharge head as claimed in claim 1 , further comprising:
a channel member coupled to a common liquid chamber side of the frame, wherein
the channel member includes a nozzle plate on which the nozzles are formed, a channel plate on which the individual liquid chamber communicating with a corresponding nozzle is formed, and a support substrate coupled to the frame and on which a channel connected with the common liquid chamber and communicating with the individual liquid chamber is formed, and wherein
the support substrate constitutes the wall of the common liquid chamber.

11. The liquid discharge head as claimed in claim 1 , further comprising:
a liquid supply member in which a liquid supply path is formed to supply liquid to the common liquid chamber, the liquid supply member being coupled to the frame at an opening side of the concave portion of the frame, wherein
the damper member is accommodated in a space constituted of the liquid supply member and the concave portion of the frame.

12. The liquid discharge head as claimed in claim 3 , wherein the joint tube is a protrusion protruding toward the damper chamber of the frame, and the liquid supply path is formed in the protrusion to communicate with the common liquid chamber.

13. The liquid discharge head as claimed in claim 2 , wherein the holder member includes an opening to permit deformation of the damper, and the opening communicates with a space of the concave portion and constitutes a part of the damper chamber.

14. The liquid discharge head as claimed in claim 2 , wherein the damper member further comprises a relief groove bounded by the damper forming member and the holder member.

15. The liquid discharge head as claimed in claim 1 , wherein an opening is disposed at a lower portion of the concave portion of the frame and the damper is disposed to face the opening, and the frame further comprises a support member forming a circumference of the opening, to support the damper member.

16. The liquid discharge head as claimed in claim 15 , further comprises a relief groove bounded by the damper member and the support member of the frame.

17. A liquid discharge head comprising:
a plurality of nozzles to discharge liquid droplets;
a plurality of individual liquid chambers to which the plurality of nozzles communicates;
a common liquid chamber, to supply a liquid to the plurality of individual liquid chambers, including a wall disposed opposite a side of an individual liquid chamber and formed of a deformable damper;
a frame forming the common liquid chamber and a damper chamber disposed opposite the common liquid chamber with the damper in between, wherein the frame accommodates a damper member including the damper and includes a concave portion that serves as the damper chamber;
an opening opposite the damper and a support member to support the damper member, the opening and the support member disposed on a bottom of the concave portion facing the common liquid chamber: and
a damper forming member including a thin portion used as the damper, a thick portion laminated to the support member of the frame, and a step portion between the thin portion and the thick portion,
wherein the damper forming member is laminated to the support member of the frame with the step portion disposed on a side of the common liquid chamber.

18. A liquid discharge device comprising the liquid discharge head as claimed in claim 17 .

19. A liquid discharge apparatus comprising the liquid discharge device as claimed in claim 18 .

20. A liquid discharge apparatus comprising the liquid discharge head as claimed in claim 17 .

Assignees

• Takahashi Aki
• Ricoh Co Ltd

Inventors

• Takahashi Aki

Classifications

• B41J2002/14419

  Manifold · CPC title

• B41J2/055

  Devices for absorbing or preventing back-pressure · CPC title

• B41J2/14233 Primary

  of film type, deformed by bending and disposed on a diaphragm · CPC title