Drive unit, liquid ejecting head unit, and liquid ejecting apparatus

Patent metadata

Field	Value
Publication number	US-12583219-B2
Application number	US-202318476402-A
Country	US
Kind code	B2
Filing date	Sep 28, 2023
Priority date	Sep 30, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A drive unit is located on an opposite side in relation to an ejecting orifice of a liquid ejecting head unit. The drive unit includes a first board including a first connector coupled to a head connector of the liquid ejecting head unit; and a second board on which a drive circuit configured to generate a drive signal is mounted. The second board is disposed in an upright position with respect to the first board by being B-to-B coupled to the first board, and the drive signal is supplied from the second board to the first connector via the first board.

First claim

What is claimed is:

1 . A drive unit located on an opposite side in relation to an ejecting orifice of a liquid ejecting head unit, the drive unit comprising:
a first board including a first connector coupled to a head connector of the liquid ejecting head unit; and a second board on which a drive circuit configured to generate a drive signal is mounted, wherein the second board is disposed in an upright position with respect to the first board by being B-to-B coupled to the first board, the drive signal is supplied from the second board to the first connector via the first board, and the second board has a greater length in a first direction that is an opposite of the ejecting orifice of the liquid ejecting head unit than in both directions orthogonal to the first direction.

2 . The drive unit according to claim 1 , wherein
the second board is coupled to another board by being B-to-B coupled to the first board only.

3 . The drive unit according to claim 1 , further comprising:
a third board disposed in an upright position with respect to the first board by being B-to-B coupled to the first board, wherein a drive signal generated by a drive circuit mounted on the third board is supplied to the liquid ejecting head unit via the first board.

4 . The drive unit according to claim 3 , wherein
the second board and the third board are spaced from each other in a direction orthogonal to a first direction that is an opposite of the ejecting orifice of the liquid ejecting head unit.

5 . The drive unit according to claim 4 , further comprising:
a water cooling mechanism located between the second board and the third board and configured to cause liquid to flow between the second board and the third board, wherein the second board is in contact with a second thermal conductive material, and the water cooling mechanism is in contact with, of the second thermal conductive material, an opposite side in relation to the second board.

6 . The drive unit according to claim 5 , wherein
the water cooling mechanism causes the liquid to flow between the second board and the third board in the first direction or in a direction that is an opposite of the first direction.

7 . The drive unit according to claim 5 , wherein
the water cooling mechanism is located on, of the third board, an opposite side in relation to the second board, and causes the liquid to flow on, of the third board, the opposite side in relation to the second board, the third board is in contact with a third thermal conductive material, and the water cooling mechanism is in contact with, of the third thermal conductive material, an opposite side in relation to the third board.

8 . The drive unit according to claim 7 , wherein
the water cooling mechanism causes liquid after flowing between the second board and the third board to flow on, of the third board, the opposite side in relation to the second board.

9 . A liquid ejecting head unit, comprising:
a drive unit; and a head,
the head including
an ejecting orifice that, upon receiving a drive signal supplied from the drive unit, ejects liquid from a nozzle provided in a nozzle surface, and
a collective board that includes a head connector,

the drive unit being located on an opposite side in relation to the ejecting orifice and including
a first board including a first connector coupled to the head connector, and
a second board on which a drive circuit configured to generate a drive signal is mounted, wherein

the second board is disposed in an upright position with respect to the first board by being B-to-B coupled to the first board, the drive signal is supplied from the second board to the first connector via the first board, and the second board has a greater length in a first direction that is an opposite of the ejecting orifice of the liquid ejecting head unit than in both directions orthogonal to the first direction.

10 . A liquid ejecting apparatus, comprising:
a plurality of sets each including a plurality of liquid ejecting head units and a transportation unit, the liquid ejecting head unit including a drive unit and a head,
the head including
an ejecting orifice that, upon receiving a drive signal supplied from the drive unit, ejects liquid from a nozzle provided in a nozzle surface, and
a collective board that includes a head connector,

the drive unit being located on an opposite side in relation to the ejecting orifice and including
a first board including a first connector coupled to the head connector, and
a second board on which a drive circuit configured to generate a drive signal is mounted, wherein

the second board is disposed in an upright position with respect to the first board by being B-to-B coupled to the first board, and the drive signal is supplied from the second board to the first connector via the first board.

Assignees

• Seiko Epson Corp

Inventors

• Kondo Yoichiro
• Yanagihara Hirokazu

Classifications

• B41J29/377 Primary

  Cooling or ventilating arrangements · CPC title

• B41J2/04581

  controlling heads based on piezoelectric elements · CPC title

• B41J2202/20

  Modules · CPC title

• B41J2202/08

  dealing with thermal variations, e.g. cooling · CPC title

• B41J2/04541 Primary

  Specific driving circuit · CPC title