JP2021035741A - 液体噴射ヘッド及び液体噴射装置 - Google Patents
液体噴射ヘッド及び液体噴射装置 Download PDFInfo
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
- B41J2002/14241—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm having a cover around the piezoelectric thin film element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14419—Manifold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14491—Electrical connection
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- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
図1〜図4を用いて、液体噴射ヘッドの一例であるインクジェット式記録ヘッド(以下、記録ヘッドと称する)について説明する。図1は、記録ヘッドのノズル面側から見た平面図である。図2は、図1のA−A′線断面図である。図3は、記録ヘッドに設けられた圧電アクチュエーターの要部を拡大した平面図である。図4は、図3のB−B′線断面図である。
図5を用いて、実施形態2に係る記録ヘッドについて説明する。なお、実施形態1と同一のものには同一の符号を付し、重複する説明は省略する。
図6を用いて、実施形態3に係る記録ヘッドについて説明する。なお、実施形態1と同一のものには同一の符号を付し、重複する説明は省略する。
以上、本発明の各実施形態について説明したが、本発明の基本的な構成は上述したものに限定されるものではない。
Claims (13)
- ノズルに連通する圧力室が形成された流路形成基板と、前記流路形成基板の一方面側に形成された振動板と、前記振動板の前記流路形成基板とは反対面側に形成された第1の電極、圧電体層及び第2の電極を備える圧電アクチュエーターと、を備える液体噴射ヘッドであって、
前記振動板は、平面視において前記圧力室に対向する領域の中央部に、前記第1の電極と前記第2の電極とにより前記圧電体層が挟まれた能動部が設けられておらず、
前記中央部には、前記振動板を覆う保護膜が形成され、
前記保護膜は、前記振動板よりも圧縮応力が大きい
ことを特徴とする液体噴射ヘッド。 - ノズルに連通する圧力室が形成された流路形成基板と、前記流路形成基板の一方面側に形成された振動板と、前記振動板の前記流路形成基板とは反対面側に形成された第1の電極、圧電体層及び第2の電極を備える圧電アクチュエーターと、を備える液体噴射ヘッドであって、
前記振動板は、平面視において前記圧力室に対向する領域の中央部に、前記第1の電極と前記第2の電極とにより前記圧電体層が挟まれた能動部が設けられておらず、
前記中央部には、前記振動板を覆う保護膜が形成され、
前記保護膜は、前記振動板よりも引っ張り応力が大きい
ことを特徴とする液体噴射ヘッド。 - 請求項1又は請求項2に記載の液体噴射ヘッドにおいて、
前記振動板は、前記圧力室に向かい凸状に撓んでいる
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項3の何れか一項に記載の液体噴射ヘッドにおいて、
前記保護膜は、前記圧電体層又は前記第2の電極を覆っている
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項4の何れか一項に記載の液体噴射ヘッドにおいて、
前記能動部は、平面視において、前記圧力室よりも外側にまで設けられている
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項5の何れか一項に記載の液体噴射ヘッドにおいて、
前記振動板は、2層以上の膜で構成されている
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項6の何れか一項に記載の液体噴射ヘッドにおいて、
前記保護膜は、前記振動板の最も前記圧力室側の層よりも曲げ強さが大きい
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項7の何れか一項に記載の液体噴射ヘッドにおいて、
前記保護膜は、前記振動板の最も前記圧力室側の層よりもヤング率が大きい
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項8の何れか一項に記載の液体噴射ヘッドにおいて、
前記保護膜は、酸化ジルコニウムを含む
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項9の何れか一項に記載の液体噴射ヘッドにおいて、
前記振動板は、酸化ジルコニウムを含み、
前記振動板の前記酸化ジルコニウムの結晶構造は正方晶または立方晶を含む
ことを特徴とする液体噴射ヘッド。 - 請求項1〜請求項10の何れか一項に記載の液体噴射ヘッドにおいて、
前記振動板は、イットリウムを含む
ことを特徴とする液体噴射ヘッド。 - 請求項10に記載の液体噴射ヘッドにおいて、
前記振動板の前記酸化ジルコニウムは、粒状の結晶を含む
ことを特徴とする液体噴射ヘッド。 - 請求項1〜12の何れか一項に記載の液体噴射ヘッドを備えることを特徴とする液体噴射装置。
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JP2019157935A JP7331558B2 (ja) | 2019-08-30 | 2019-08-30 | 液体噴射ヘッド及び液体噴射装置 |
US17/005,578 US11376850B2 (en) | 2019-08-30 | 2020-08-28 | Liquid ejecting head and liquid ejecting apparatus |
US17/830,404 US11827019B2 (en) | 2019-08-30 | 2022-06-02 | Liquid ejecting head and liquid ejecting apparatus |
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JP2017052254A (ja) * | 2015-09-11 | 2017-03-16 | セイコーエプソン株式会社 | 圧電デバイス、液体噴射ヘッド、液体噴射装置及び圧電デバイスの製造方法 |
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JP6981000B2 (ja) * | 2016-12-02 | 2021-12-15 | セイコーエプソン株式会社 | 液体噴射ヘッド、液体噴射装置及び圧電デバイス |
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JPH1086362A (ja) * | 1996-09-10 | 1998-04-07 | Ricoh Co Ltd | インクジェットヘッド及びその製造方法 |
US20060066180A1 (en) * | 2004-09-29 | 2006-03-30 | Ngk Insulators, Ltd. | Piezoelectric/electrostrictive porcelain composition, piezoelectric/electrostrictive article, and piezoelectric/electrostrictive film type element |
JP2010208204A (ja) * | 2009-03-11 | 2010-09-24 | Fujifilm Corp | 液体吐出ヘッド、液体吐出ヘッドの製造方法及び画像形成装置 |
JP2011056913A (ja) * | 2009-09-14 | 2011-03-24 | Fujifilm Corp | 液体吐出ヘッド、その製造方法、並びに、その駆動方法、及び、画像記録装置 |
JP2016068307A (ja) * | 2014-09-29 | 2016-05-09 | セイコーエプソン株式会社 | 液体吐出ヘッド、及び、液体吐出装置、並びに液体吐出ヘッドの製造方法 |
JP2017052254A (ja) * | 2015-09-11 | 2017-03-16 | セイコーエプソン株式会社 | 圧電デバイス、液体噴射ヘッド、液体噴射装置及び圧電デバイスの製造方法 |
US20180264809A1 (en) * | 2017-03-17 | 2018-09-20 | Satoshi Mizukami | Liquid discharge head, liquid discharge device, and liquid discharge apparatus |
JP2018154122A (ja) * | 2017-03-17 | 2018-10-04 | 株式会社リコー | 液体吐出ヘッド、液体吐出ユニット、および液体を吐出する装置 |
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US11376850B2 (en) | 2022-07-05 |
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US20210060949A1 (en) | 2021-03-04 |
US20220297430A1 (en) | 2022-09-22 |
US11827019B2 (en) | 2023-11-28 |
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