Liquid ejecting head and liquid ejecting apparatus

Patent metadata

Field	Value
Publication number	US-9427965-B2
Application number	US-201514659285-A
Country	US
Kind code	B2
Filing date	Mar 16, 2015
Priority date	Mar 17, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

Provided is a liquid ejecting head which includes a head main body which ejects ink from a liquid ejection surface and has a plurality of manifolds which store the ink, and a flow-path member in which a first distribution flow path and a second distribution flow path is provided to supply ink to the head main body, in which the plurality of manifolds are arranged on the same plane and the plurality of manifolds, the first distribution flow path, and the second distribution flow path are not disposed in the same plane.

First claim

What is claimed is:

1. A liquid ejecting head comprising:
a head main body which ejects liquid from a liquid ejection surface and has a plurality of manifolds which store the liquid and are in communication with pressure generation chambers; and
a flow-path member upstream of the head main body in which a first distribution flow path and a second distribution flow path are provided to supply the liquid to the plurality of manifolds of the head main body,
wherein the plurality of manifolds are arranged on the same plane and each of the plurality of manifolds, the first distribution flow path, and the second distribution flow path are not disposed in the same plane.

2. The liquid ejecting head according to claim 1 ,
wherein at least parts of the first distribution flow path and the second distribution flow path overlap when viewed from a direction perpendicular to the liquid ejection surface.

3. A liquid ejecting apparatus comprising:
the liquid ejecting head according to claim 2 .

4. The liquid ejecting head according to claim 1 , further comprising:
a first introduction flow path which communicates with the first distribution flow path; and
a second introduction flow path which communicates with the second distribution flow path,
wherein the first introduction flow path and the second introduction flow path extends to a side opposite to the head main body, in a direction perpendicular to the liquid ejection surface, and
wherein a boundary portion between the first distribution flow path and the first introduction flow path and a boundary portion between the second distribution flow path and the second introduction flow path are disposed between the plurality of manifolds, in a direction in which ink flows in the first distribution flow path and the second distribution flow path.

5. The liquid ejecting head according to claim 4 ,
wherein, in a direction perpendicular to the liquid ejection surface, the first distribution flow path is disposed closer to the head main body than the second introduction flow path, and
wherein the second distribution flow path is spaced from the first introduction flow path.

6. A liquid ejecting apparatus comprising:
the liquid ejecting head according to claim 4 .

7. The liquid ejecting head according to claim 1 ,
wherein the flow-path member is formed by stacking a first flow-path member, a second flow-path member, and a third flow-path member, in the direction perpendicular to the liquid ejection surface, in order, far away from the head main body,
wherein the first distribution flow path is formed in a boundary between the second flow-path member and the third flow-path member, and
wherein the second distribution flow path is formed in a boundary between the first flow-path member and the second flow-path member.

8. The liquid ejecting head according to claim 1 ,
wherein a direction in which liquid flows in the manifold intersects a direction in which liquid flows in the first distribution flow path and the second distribution flow path.

9. The liquid ejecting head according to claim 1 ,
wherein a nozzle row constituted of a plurality of nozzle openings which are aligned in one direction and through which liquid is ejected is provided in the liquid ejection surface,
wherein the manifold extends in the one direction, and
wherein a vertical flow path extending in a direction perpendicular to the liquid ejection surface allows the manifold to communicate with the first distribution flow path and the second distribution flow path.

10. The liquid ejecting head according to claim 1 ,
wherein the first distribution flow path is formed in a first plane, and
wherein the second distribution flow path is formed in a second plane, the first plane being different from the second plane.

11. The liquid ejecting head according to claim 1 ,
wherein a first connection portion and a second connection portion are connected to a common head main body.

12. The liquid ejecting head according to claim 11 , further comprising a plurality of other head main bodies each with a liquid ejection surface, a plurality of other first connection portions, and a plurality of other second connection portions,
wherein the plurality of other first connection portions and the plurality of other second connection portions are alternately connected to the plurality of other head main bodies aligned in a direction in which the first distribution flow path and the second distribution flow path extend.

13. The liquid ejecting head according to claim 12 , further comprising:
a relay substrate to which a plurality of flexible wiring substrates are connected, each of the plurality of flexible wiring substrates being bonded to one of the head main body and the plurality of other head main bodies,
wherein the flow-path member is provided in a portion between the relay substrate and the head main body and the plurality of other head main bodies, in a direction in which the plurality of flexible wiring substrates extend to the flow-path member side with respect to the head main body and the plurality of other head main bodies.

14. The liquid ejecting head according to claim 12 ,
wherein all of the plurality of flexible wiring substrates connect to the plurality of other head main bodies, each of which communicates with one of a plurality of other first distribution flow paths and one of a plurality of other second distribution flow paths and overlap when viewed from a direction in which liquid flows in the plurality of other first distribution flow paths or the plurality of other second distribution flow paths.

15. The liquid ejecting head according to claim 12 ,
wherein the first distribution flow path is located further on the head main body side in a direction perpendicular to the liquid ejection surface than the second distribution flow path,
wherein nozzle rows constituted of nozzle openings which are aligned in one direction and through which liquid is ejected are provided in the liquid ejection surface of the head main body and the liquid ejection surface of the plurality of other head main bodies,
wherein the one direction in which the nozzle rows are aligned intersects a transporting direction of an ejection target medium onto which liquid is ejected by the head main body and the plurality of other head main bodies,
wherein the first distribution flow path includes a first upstream-side distribution flow path and a first downstream-side distribution flow path which are disposed on both sides of the head main body and the plurality of other head main bodies in the transporting direction,
wherein the second distribution flow path includes a second upstream-side distribution flow path and a second downstream-side distribution flow path which are disposed on both sides of the head main body and the plurality of other head main bodies in the transporting direction, and
wherein the positions of the first upstream distribution flow path, the first downstream-side distribution flow path, the second upstream-side distribution flow path, and the second downstream-side distribution flow path, in relation to the plurality of flexible wiring substrates, are common to all of the plurality of other head main bodies and the head main body.

16. The liquid ejecting head according to claim 1 ,
wherein the head main body has the manifold which extends in one direction along an end portion of a flexible wiring substrate, which is the end portion bonded to the head main body, and which stores liquid supplied to the head main body, and
wherein a first connection portion and a se

Assignees

• Seiko Epson Corp

Inventors

• Togashi Isamu

Classifications

• B41J2002/14362

  Assembling elements of heads · CPC title

• B41J2002/14419

  Manifold · CPC title

• B41J2/14233 Primary

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