Liquid discharging head, liquid discharging unit, and device for discharging liquid

Patent metadata

Field	Value
Publication number	US-10160226-B2
Application number	US-201715638724-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Jan 6, 2015
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A liquid discharging head includes: a nozzle plate having a plurality of nozzles from which liquid is discharged; a channel member including a plurality of individual liquid chambers that lead to the plurality of nozzles, respectively, and including a plurality of circulation channels that lead to the plurality of individual liquid chambers, respectively; and a common liquid chamber member for forming a common liquid chamber that supplies liquid to the plurality of individual liquid chambers and for forming a circulation common liquid chamber that leads to the plurality of circulation channels.

First claim

What is claimed is:

1. A liquid discharging head comprising:
a nozzle plate having a plurality of nozzles from which liquid is discharged;
a channel member including a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; and
a common liquid chamber member for forming a common liquid chamber that supplies liquid to the plurality of individual liquid chambers and for forming a circulation common liquid chamber, wherein
the common liquid chamber and the circulation common liquid chamber are both arranged on the same side with respect to the nozzles, in a longitudinal direction of the liquid chambers.

2. The liquid discharging head according to claim 1 , wherein the common liquid chamber member is joined to the channel member.

3. The liquid discharging head according to claim 1 , wherein the circulation common liquid chamber and a part of the common liquid chamber are arranged side by side in a direction orthogonal to both a direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.

4. The liquid discharging head according to claim 1 , wherein the circulation common liquid chamber occupies a part of space in the common liquid chamber member.

5. The liquid discharging head according to claim 1 , wherein each of the common liquid chamber and the circulation common liquid chamber has liquid ports on both ends in the direction in which the nozzles are aligned.

6. The liquid discharging head according to claim 1 ,
wherein the common liquid chamber member includes at least three members that are consecutively layered in the direction in which liquid is discharged from the nozzles,
wherein, among the three members, one of two members arranged in series in the direction of layering has a through-part to become a part of the common liquid chamber and has a through-part to become the circulation common liquid chamber, and
wherein another one of the two members is provided to form a wall part of the circulation common liquid chamber and has a through-part to become another part of the common liquid chamber.

7. The liquid discharging head according to claim 1 ,
wherein the common liquid chamber member includes at least three members that are consecutively layered in the direction in which liquid is discharged from the nozzles, and
wherein a ledge part is formed at each joint part of the at least three members that are consecutively layered.

8. The liquid discharging head according to claim 7 , wherein the ledge part formed at each joint part of the at least three members that are consecutively layered is formed due to deformation that is made in press processing to form the at least three members that are layered.

9. The liquid discharging head according to claim 7 , wherein the ledge part formed at each joint part of the at least three members that are consecutively layered is formed due to dimensional gaps between the at least three members that are layered.

10. A liquid discharging unit comprising: the liquid discharging head according to claim 1 .

11. A device for discharging liquid, the device comprising: the liquid discharging unit according to claim 10 .

12. A device for discharging liquid, the device comprising: the liquid discharging head according to claim 1 .

13. The liquid discharging head according to claim 1 , wherein the piezoelectric member is arranged at a position away from the nozzles than a joining plane, where the channel member and the common liquid chamber member are joined, in a direction opposite to the direction in which liquid is discharged from the nozzles.

14. A liquid discharging head comprising:
a nozzle plate having a plurality of nozzles from which liquid is discharged;
a channel member including a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively, and including a plurality of circulation channels that lead to the plurality of individual liquid chambers, respectively; and
a common liquid chamber member for forming a common liquid chamber that supplies liquid to the plurality of individual liquid chambers and for foil ling a circulation common liquid chamber that leads to the plurality of circulation channels, wherein
the circulation common liquid chamber occupies a part of space in the common liquid chamber member, and
a part of the common liquid chamber overlaps the circulation common liquid chamber from a surface opposite to the direction in which liquid is discharged from the nozzles and another part of the common liquid chamber covers the circulation common liquid chamber from one of the surfaces facing the direction orthogonal to both the direction in which liquid is discharged from the nozzles and the direction in which the nozzles are aligned.

15. A liquid discharging head comprising:
a nozzle plate having a plurality of nozzles from which liquid is discharged;
a channel member including a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively, and including a plurality of circulation channels that lead to the plurality of individual liquid chambers, respectively; and
a common liquid chamber member for forming a common liquid chamber that supplies liquid to the plurality of individual liquid chambers and for forming a circulation common liquid chamber that leads to the plurality of circulation channels, wherein
the circulation common liquid chamber occupies a part of space in the common liquid chamber member, and
a part of the common liquid chamber overlaps the circulation common liquid chamber from a surface opposite to the direction in which liquid is discharged from the nozzles and another part of the common liquid chamber overlaps the circulation common liquid chamber from one of the surfaces facing the direction orthogonal to both the direction in which liquid is discharged from the nozzles and the direction in which the nozzles are aligned.

Assignees

• Kohda Tomohiko
• Yoshida Takahiro
• Andou Shiomi
• Nakai Takayuki
• Abe Kanshi
• Shimizu Takeshi
• Kasahara Ryo
• Ricoh Co Ltd

Inventors

• Kohda Tomohiko
• Yoshida Takahiro
• Andou Shiomi
• Nakai Takayuki
• Abe Kanshi
• Shimizu Takeshi
• Kasahara Ryo

Classifications

• B41J2/175

  Ink supply systems {; Circuit parts therefor} · CPC title

• B41J2/17509

  Whilst mounted in the printer · CPC title

• B41J2202/12

  with ink circulating through the whole print head · CPC title

• B41J2/14274

  of stacked structure type, deformed by compression/extension and disposed on a diaphragm · CPC title

• B41J2/17563

  Ink filters · CPC title