JPH0224143A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPH0224143A JPH0224143A JP17560288A JP17560288A JPH0224143A JP H0224143 A JPH0224143 A JP H0224143A JP 17560288 A JP17560288 A JP 17560288A JP 17560288 A JP17560288 A JP 17560288A JP H0224143 A JPH0224143 A JP H0224143A
- Authority
- JP
- Japan
- Prior art keywords
- pressure generating
- ink
- generating members
- nozzle
- generating member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000002648 laminated material Substances 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
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
- B41J2/14282—Structure of print heads with piezoelectric elements of cantilever type
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、インクの中に浸されている圧力発生部材に電
圧を印加して圧力発生部材を変形させ、ノズル形成基板
との間隙に存在するインクの圧力を高めてノズルからイ
ンク滴を吐出させる機構のインクジェットヘッドに関す
る。Detailed Description of the Invention [Field of Industrial Application] The present invention deforms the pressure generating member by applying a voltage to the pressure generating member immersed in ink, and deforms the pressure generating member that is present in the gap between the nozzle forming substrate and the nozzle forming substrate. The present invention relates to an inkjet head with a mechanism that increases the pressure of ink to eject ink droplets from a nozzle.
複数のノズルを有するノズル形成基板と、ノズルの各々
と対向配置し、インクの中に浸されている圧力発生部材
とを備え、電圧印加により圧力発生部材を変形させ、ノ
ズル形成基板との間隙に存在するインクの圧力を高めて
ノズルからインク滴を吐出させるオンデマンド型インク
ジェットヘッドは、例えば特公昭６０−８９５３号に開
示されており、このインクジェット機構は、圧力発生部
材がノズル形成基板に対し概ね垂直方向に変位する事と
、ノズルのインク流路が短い事により、インク滴の吐出
効率及び吐出安定性に優れ、かつインク中に気泡やゴミ
等が混入した場合でもその影響を受ける事無く正常に動
作し、更には、圧力発生部材が片持ちもしくは両持ち梁
状構造である事により、電気機械変換効率が高く、低い
電圧で必要とする圧力発生部材の変位をもたらす事が出
来るという特徴を有する。It includes a nozzle forming substrate having a plurality of nozzles, and a pressure generating member disposed facing each of the nozzles and immersed in ink.The pressure generating member is deformed by applying a voltage, and the pressure generating member is deformed in the gap between the nozzle forming substrate and the nozzle forming substrate. An on-demand inkjet head that increases the pressure of existing ink to eject ink droplets from a nozzle is disclosed, for example, in Japanese Patent Publication No. 60-8953. Due to the vertical displacement and the short ink flow path of the nozzle, it has excellent ink droplet ejection efficiency and ejection stability, and even if air bubbles or dust get mixed into the ink, it will work normally without being affected by it. Furthermore, because the pressure generating member has a cantilevered or double-sided beam structure, the electromechanical conversion efficiency is high and the required displacement of the pressure generating member can be achieved with a low voltage. have
このタイプのインクジェットヘッドにおいては、インク
を介したクロストークを避ける為、圧力発生部材間の間
隙の寸法をあまり小さく出来ず、高密度化に限界があっ
た。In this type of inkjet head, in order to avoid crosstalk via the ink, the size of the gap between the pressure generating members cannot be made very small, and there is a limit to increasing the density.
本発明の目的は、この技術課題を解決して、高密度化の
可能な構造のインクジェットヘッドを提供する事にある
。An object of the present invention is to solve this technical problem and provide an inkjet head having a structure capable of increasing density.
本発明におけるインクジェットヘッドは、複数のノズル
を有するノズル形成基板と、ノズルの各々と対向配置し
、インクの中に浸されている圧力発生部材とを備え、電
圧印加により圧力発生部材を変形させ、ノズル形成基板
との間隙に存在するインクの圧力を高めてノズルからイ
ンク滴を吐出させるインクジェットヘッドであって、圧
力発生部材間の間隙を構成する圧力発生部材表面が、イ
ンクと９０度以上の接触角を有する物質である事を特徴
とする。An inkjet head according to the present invention includes a nozzle forming substrate having a plurality of nozzles, a pressure generating member disposed facing each of the nozzles and immersed in ink, and deforming the pressure generating member by applying a voltage. An inkjet head that ejects ink droplets from a nozzle by increasing the pressure of ink existing in a gap with a nozzle forming substrate, wherein the surface of the pressure generating member forming the gap between the pressure generating members is in contact with the ink at an angle of 90 degrees or more. It is characterized by being a substance with corners.
本発明の上記の構成によれば、圧力発生部材間の間隙を
構成する圧力発生部材表面が、インクで濡れない為、イ
ンクの粘性に起因するクロストークが低減する。According to the above configuration of the present invention, the surface of the pressure generating members forming the gap between the pressure generating members is not wetted with ink, so that crosstalk caused by the viscosity of the ink is reduced.
本発明における実施例を、図面に基づき説明する。 Embodiments of the present invention will be described based on the drawings.
第１図は、本発明におけるインクジェットヘッドを搭載
した記録装置の一実施例を説明するための斜視図である
。記録媒体１は、送りローラー２・３の押圧によりプラ
テン４に捲き回され、記録の進行に従い矢印５の方向に
搬送される。ガイド軸６・７に案内されプラテン４の軸
と平行な方向に移動可能なキャリッジ８上には、複数の
ノズルを有するインクジェットヘッド９が搭載されてお
り、矢印１０の方向に移動しつつ各々のノズルからイン
ク滴を吐出して記録媒体上にインク像を形成する。FIG. 1 is a perspective view for explaining an embodiment of a recording apparatus equipped with an inkjet head according to the present invention. The recording medium 1 is wound around the platen 4 by the pressure of the feed rollers 2 and 3, and is conveyed in the direction of the arrow 5 as recording progresses. An inkjet head 9 having a plurality of nozzles is mounted on a carriage 8 that is guided by guide shafts 6 and 7 and movable in a direction parallel to the axis of the platen 4. The inkjet head 9 has a plurality of nozzles. An ink image is formed on a recording medium by ejecting ink droplets from a nozzle.
第２図（ａ） （ｂ）は、本発明におけるインクジ
ェットヘッド９の構造並びにインク滴の吐出原理を説明
するためのヘッド断面図である。ノズル形成基板１１に
は、複数のノズル１２が設けられ、各々のノズル１２に
は、圧電素子１３と金属板１４の積層材から成る圧力発
生部材１５が対向配置され、インク１６中に浸された構
造となっている（第２図（ａ）’）、更に、圧力発生部
材１５間の間隙１７を構成する圧力発生部材表面１８に
は、インクと９０度以上の接触角を有する物質、即ちイ
ンク１６に濡れない物質が用いられている（第２図（ｂ
）’）、圧電素子１３に電圧を印加すると、圧電素子１
３が収縮し、金属板１４とで形成するバイメタル効果に
よって、圧力発生部材１５は、ノズル１２の方向へ変形
する。この変形によって圧力発生部材１５とノズル形成
基板１１との間隙１９に存在するインクの圧力が高まり
、ノズル１２からインク滴（図示せず）が吐出する。FIGS. 2(a) and 2(b) are head sectional views for explaining the structure of the inkjet head 9 and the principle of ejecting ink droplets in the present invention. A plurality of nozzles 12 are provided on the nozzle forming substrate 11, and a pressure generating member 15 made of a laminated material of a piezoelectric element 13 and a metal plate 14 is disposed facing each other and is immersed in the ink 16. Furthermore, the pressure generating member surface 18 forming the gap 17 between the pressure generating members 15 is coated with a substance having a contact angle of 90 degrees or more with the ink, that is, the ink. 16, a non-wettable substance is used (Fig. 2(b)
)'), when a voltage is applied to the piezoelectric element 13, the piezoelectric element 1
3 contracts, and the pressure generating member 15 deforms in the direction of the nozzle 12 due to the bimetallic effect formed with the metal plate 14. This deformation increases the pressure of the ink existing in the gap 19 between the pressure generating member 15 and the nozzle forming substrate 11, and ink droplets (not shown) are ejected from the nozzle 12.
この時、圧力発生部材１５間の間隙１７を構成する圧力
発生部、材表面１８がインク１６に濡れない為、間隙１
７に存在するインクの粘性に起因する圧力発生部材１５
間のクロストークか大幅に抑えられる。At this time, since the pressure generating part and the material surface 18 forming the gap 17 between the pressure generating members 15 are not wetted by the ink 16, the gap 1
Pressure generating member 15 due to the viscosity of the ink present in 7
Crosstalk between the two can be significantly reduced.
以上述べたように、本発明によれば、圧力発生部材間の
間隙を構成する圧力発生部材表面が、インクと９０度以
上の接触角を有する物質である為、その箇所はインクで
濡れず、圧力発生部材間の１■隙に存在するインクの粘
性に起因する圧力発生部材間のクロストークを大幅に抑
えられるので、従来は不可能だった、狭い圧力発生部材
間の間隙を採用出来る結果、高密度なインクジェットヘ
ッドを提供する事が可能となる。また、本発明によれば
、圧力発生部材間の間隙に存在するインクが有する粘性
によって消費されるエネルギーロスが低減し、消費電力
の低下に貢献するとともに、圧力発生部材とノズル形成
基板との間隙の寸法のマージンが広がり、製造上有利に
作用する。As described above, according to the present invention, since the surface of the pressure generating member forming the gap between the pressure generating members is a material having a contact angle with the ink of 90 degrees or more, the area is not wetted by the ink. Crosstalk between the pressure generating members caused by the viscosity of the ink existing in the 1-inch gap between the pressure generating members can be greatly suppressed, making it possible to use a narrow gap between the pressure generating members, which was previously impossible. It becomes possible to provide a high-density inkjet head. Further, according to the present invention, the energy loss consumed due to the viscosity of the ink existing in the gap between the pressure generating members is reduced, contributing to a reduction in power consumption, and the gap between the pressure generating member and the nozzle forming substrate is reduced. The dimensional margin is widened, which is advantageous in manufacturing.
第１図は、本発明におけるインクジェットヘッドを搭載
した記録装置の一実施例を説明するための斜視図、第２
図（ａ） （ｂ）は、本発明におけるインクジェッ
トヘッドの構造並びにインク滴の吐出原理を説明するた
めのヘッド断面図。
■・・・記録媒体
９・・・インクジェットヘッド
■・・・ノズル形成基板
２・・・ノズル １３・・・圧電素子４・・・金属
板 １５・・・圧力発生部材６・・・インク
７・・・圧力発生部材間の間隙
８・・・間隙１７を構成する圧力発生部材表面以上
第１
７７、・ノス５しη賢万覧１【オ忍り
瓦囲咀１用蟇面
（ａ）
ノ１８
ヅ
７っ〆１７
Ａ犬視砺
（ｂ）
第２閤FIG. 1 is a perspective view for explaining one embodiment of a recording device equipped with an inkjet head according to the present invention, and FIG.
Figures (a) and (b) are head sectional views for explaining the structure of the inkjet head and the principle of ejecting ink droplets in the present invention. ■...Recording medium 9...Inkjet head■...Nozzle forming substrate 2...Nozzle 13...Piezoelectric element 4...Metal plate 15...Pressure generating member 6...Ink 7...・Gap 8 between pressure generating members ・Gap 17 above the surface of the pressure generating member constituting the gap 17 18 ㅅ7〆17 A dog vision (b) 2nd meal
Claims (1)
の各々と対向配置し、インクの中に浸されている圧力発
生部材とを備え、電圧印加により前記圧力発生部材を変
形させ、前記ノズル形成基板との間隙に存在するインク
の圧力を高めて前記ノズルからインク滴を吐出させるイ
ンクジェットヘッドにおいて、 前記圧力発生部材間の間隙を構成する圧力発生部材表面
が、前記インクと９０度以上の接触角を有する物質であ
る事を特徴とするインクジェットヘッド。[Scope of Claims] A nozzle forming substrate having a plurality of nozzles, and a pressure generating member disposed facing each of the nozzles and immersed in ink, wherein the pressure generating member is deformed by applying a voltage. , an inkjet head that increases the pressure of ink existing in a gap with the nozzle forming substrate to eject ink droplets from the nozzle, wherein a surface of the pressure generating member forming the gap between the pressure generating members is at an angle of 90 degrees with the ink. An inkjet head characterized by being made of a substance having a contact angle greater than or equal to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17560288A JPH0224143A (en) | 1988-07-13 | 1988-07-13 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17560288A JPH0224143A (en) | 1988-07-13 | 1988-07-13 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0224143A true JPH0224143A (en) | 1990-01-26 |
Family
ID=15998960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17560288A Pending JPH0224143A (en) | 1988-07-13 | 1988-07-13 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0224143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1036660A1 (en) * | 1999-03-15 | 2000-09-20 | Tally GmbH | Drop-on-Demand printhead with piezo bending transducers and driving method for the same |
-
1988
- 1988-07-13 JP JP17560288A patent/JPH0224143A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1036660A1 (en) * | 1999-03-15 | 2000-09-20 | Tally GmbH | Drop-on-Demand printhead with piezo bending transducers and driving method for the same |
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