JPH0230543A - Ink jet head - Google Patents

Ink jet head

Info

Publication number
JPH0230543A
JPH0230543A JP18240188A JP18240188A JPH0230543A JP H0230543 A JPH0230543 A JP H0230543A JP 18240188 A JP18240188 A JP 18240188A JP 18240188 A JP18240188 A JP 18240188A JP H0230543 A JPH0230543 A JP H0230543A
Authority
JP
Japan
Prior art keywords
ink
pressure
pressure generating
inkjet head
nozzle
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
Application number
JP18240188A
Other languages
Japanese (ja)
Inventor
Tsuyoshi Kitahara
強 北原
Haruhiko Koto
小藤　治彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP18240188A priority Critical patent/JPH0230543A/en
Publication of JPH0230543A publication Critical patent/JPH0230543A/en
Pending legal-status Critical Current

Links

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
    • B41J2/14427—Structure of ink jet print heads with thermal bend detached actuators

Abstract

PURPOSE:To obtain an ink jet head favorable in production yield, drivable at a low voltage, and stable in ink drip discharge characteristics by applying a selective electric signal to a heating means forming a pressure generation means. CONSTITUTION:With the application of electric signals to electric signal lines 25, 24, an electric current flows in a direction shown by an arrow 60, and a heat generation layer 26 heats to increase in temperature rapidly. The thermal energy generated in the heat generation layer 26 is conducted to an adjacent recording ink 31 and a vibration plate 23. Here, in consideration of an unconstant thermal conduction especially in the direction of the thickness of the vibration plate 23, in a pressure generation member 40, which has been initially in a uniform temperature state, a temperature gradient occurs inside by the heat generation of the heat generation layer 26 and a thermal stress attributed to the thermal expansibilities of the components is generated. A bending moment is generated in the pressure generation member 40 by this phenomenon. The pressure generation member 40 is deformed and displaced toward a nozzle plate 21 because it is fixed at one end, thereby making the recording ink 31 in the vicinity of a nozzle opening 20 fly out of the nozzle opening 20 as an ink drip.

Description

【発明の詳細な説明】 ［産業上の利用分野コ 本発明はインク滴を飛翔させ記録紙等の媒体上にインク
像を形成するプリンタ等インクジェット方式の記録方式
に関しさらに詳細にはインクジェットプリンタヘッドに
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inkjet recording system such as a printer that flies ink droplets to form an ink image on a medium such as recording paper, and more particularly relates to an inkjet printer head. .

〔従来の技術〕[Conventional technology]

従来のインクジェットヘッドの構成としては、特公昭５
３−１２１３８号公報番こ記載されているように、イン
ク室からノズルオリフィスに至るインク流路中に設置さ
れた圧力室の側壁に設けられた圧電変換器の動作により
圧力室内に圧力を発生させインク滴を飛翔させる方法、
及び特公昭６０８９５３号公報に記載されているように
、複数のノズル開口を有するノズル板とこの背後にイン
クと直接接触する圧電変換器で構成された振動子がノズ
ル板と概ね直行する方向に振動することによりインク滴
を飛翔させる方法が知られている。The structure of the conventional inkjet head is
As described in Publication No. 3-12138, pressure is generated in the pressure chamber by the operation of a piezoelectric transducer installed on the side wall of the pressure chamber installed in the ink flow path from the ink chamber to the nozzle orifice. How to make ink droplets fly,
As described in Japanese Patent Publication No. 608953, a vibrator consisting of a nozzle plate having a plurality of nozzle openings and a piezoelectric transducer behind the nozzle plate that directly contacts ink vibrates in a direction generally perpendicular to the nozzle plate. There is a known method of causing ink droplets to fly.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上記従来技術の圧電変換器を用いたインクジェットヘッ
ドの構造では、圧電変換器を構成する圧電素子と箔部材
の積層構造部における寸法精度を確保することが困難で
ある、圧電素子の板厚を薄くすることにより駆動電圧を
下げることか可能となるが、それは生産技術上困難であ
るのみならず、熱応力等に起因する割れが発生しやすく
なるという問題点を有する。また、圧電素子は高価であ
り多数ノスルタイブのインクジェットヘッドを構成する
場合、歩留まりとの関係上、低価格化が困難であるとい
う問題点を有する。本発明の目的はこれらの問題を解決
して、製造歩留まりが良好な、低電圧で駆動可能な、イ
ンク滴吐出特性が安定したインクジェットヘッドを実現
することにある。In the structure of the inkjet head using the piezoelectric transducer of the prior art described above, it is difficult to ensure dimensional accuracy in the laminated structure of the piezoelectric element and the foil member that constitute the piezoelectric transducer. Although this makes it possible to lower the driving voltage, this is not only difficult in terms of production technology, but also has the problem that cracks are more likely to occur due to thermal stress or the like. In addition, piezoelectric elements are expensive, and when constructing an inkjet head with multiple nostle types, there is a problem in that it is difficult to reduce the price due to the relationship with yield. An object of the present invention is to solve these problems and realize an inkjet head that has a good manufacturing yield, can be driven at low voltage, and has stable ink droplet ejection characteristics.

〔課題を解決するための手段〕 本発明のインクジェットヘッドは、少なくとも１つ以上
のノズル開口を有するノズル形成部材と、前記ノズル開
口に対応して配設された前記ノズル開口近傍の記録イン
クにインク滴としての飛翔が可能な圧力を発生させる圧
力発生手段とを備え、該圧力発生手段が熱歪を圧力に変
換する如く構成されることを特徴とする。[Means for Solving the Problems] An inkjet head of the present invention includes a nozzle forming member having at least one or more nozzle openings, and a recording ink near the nozzle openings disposed corresponding to the nozzle openings. The present invention is characterized in that it includes a pressure generating means for generating a pressure that allows the droplets to fly, and that the pressure generating means is configured to convert thermal strain into pressure.

なお、圧力発生手段が少なくとも１層以上の板部材と該
板部材の片面に接合された発熱層との積層で構成しても
よい。Note that the pressure generating means may be constructed by laminating at least one plate member and a heat generating layer joined to one side of the plate member.

なお、圧力発生手段を１層の発熱部材で構成してもよい
。Note that the pressure generating means may be composed of a single layer of heat generating member.

なお、圧力発生手段を互いに独立して制御可能な２層以
上の発熱部材の積層で構成してもよい。Note that the pressure generating means may be constructed of a stack of two or more layers of heat generating members that can be controlled independently of each other.

なお、圧力発生手段を線膨張率の異なる２種類以上の発
熱部材の積層で構成してもよい。Note that the pressure generating means may be constructed by laminating two or more types of heat generating members having different coefficients of linear expansion.

〔作用〕[Effect]

本発明の上記構成では、圧力発生手段を構成する発熱手
段に選択的電気信号を印加することにより圧力発生手段
に曲げモーメントを発生させ変形させる。前記変形によ
りノズル開口近傍の記録インクに圧力が発生しインク滴
として飛翔する。In the above configuration of the present invention, by applying a selective electric signal to the heat generating means constituting the pressure generating means, a bending moment is generated in the pressure generating means and the pressure generating means is deformed. The deformation generates pressure in the recording ink near the nozzle opening, causing it to fly as ink droplets.

〔実施例〕〔Example〕

次に実施例に基づいて本発明を説明する。 Next, the present invention will be explained based on examples.

第１図は本発明の一実施例を示すプリンタの斜視図であ
る。同図において記録紙１０はプラテン１１に捲回され
送りローラ１２．１３によって押圧される。ガイド軸１
４．１７に案内されプラテン軸に平行な方向に移動可能
なキャリッジ１５上にインクジェットヘッド１６が搭載
されて構成される。インクジェットヘッド１６は独立に
インク滴を吐出制御可能な複数のノズルを有しプラテン
軸方向に走査され上記ノズルから選択的にインク滴を吐
出し記録紙１０上にインク像を形成する。FIG. 1 is a perspective view of a printer showing an embodiment of the present invention. In the figure, a recording paper 10 is wound around a platen 11 and is pressed by feed rollers 12 and 13. Guide shaft 1
The inkjet head 16 is mounted on a carriage 15 that is guided by 4.17 and movable in a direction parallel to the platen axis. The inkjet head 16 has a plurality of nozzles that can independently control the ejection of ink droplets, and is scanned in the platen axis direction, selectively ejecting ink droplets from the nozzles to form an ink image on the recording paper 10.

記録紙１０はプラテン１１、送りローラ１２．１３０回
転により走査方向と直行する副走査方向に搬送され記録
紙面上への印字が行われる。The recording paper 10 is conveyed in a sub-scanning direction perpendicular to the scanning direction by a platen 11 and a feed roller 12.130 rotations, and printing is performed on the recording paper surface.

第２図（ａ）は本発明の実施例を示すインクジェットヘ
ッドの断面図である。フレーム２７とノズル形成部材で
あるノズルプレート２１間に挟持されたスペーサ２２と
圧力発生部材４０がネジ２８．３０によって締結され、
記録インク３１て充たされたインク室が固定形成される
。記録インク３１中に存在している圧力発生部材４０は
ポリサルホンよりなる板部材である振動板２３とＴ　ａ
　ｘ　Ｓ　ｊ−は発熱層２６のより詳細な説明をするた
めに圧力発生部材４０の上面を現わしたものであり、発
熱層２６は片持ち梁先端部を除いて２分され、固定力発
生部材４０は複数のノズル開口２０が列状に配置された
ノズルプレート２１のノズル開口２０と対峙する如く設
置されている。また、圧力発生部材４０とノズルプレー
ト２１より成る微小な間隙はスペーサ２２により５μｍ
から５０μｍの間に高精度に管理されている。但し、ス
ペーサ２２は図の如く別体構造を取る必要はなくノズル
プレート２１及び振動板２３との一体構造をとることも
可能である。フレーム２７は予備インク室３２を有して
おり記録インク３］へのコミ、紙ケバ等の侵入防止を目
的としたフタ２９を備えている。FIG. 2(a) is a sectional view of an inkjet head showing an embodiment of the present invention. The spacer 22 sandwiched between the frame 27 and the nozzle plate 21, which is a nozzle forming member, and the pressure generating member 40 are fastened with screws 28.30.
An ink chamber filled with recording ink 31 is fixedly formed. The pressure generating member 40 present in the recording ink 31 is composed of a diaphragm 23 and a diaphragm 23 which is a plate member made of polysulfone.
x S j- shows the top surface of the pressure generating member 40 in order to explain the heat generating layer 26 in more detail. The member 40 is installed so as to face the nozzle openings 20 of the nozzle plate 21 in which a plurality of nozzle openings 20 are arranged in a row. Further, the minute gap between the pressure generating member 40 and the nozzle plate 21 is made 5 μm by the spacer 22.
It is controlled with high precision between 50 μm and 50 μm. However, the spacer 22 does not need to have a separate structure as shown in the figure, but can also have an integral structure with the nozzle plate 21 and the diaphragm 23. The frame 27 has a spare ink chamber 32, and is equipped with a lid 29 for the purpose of preventing dust, paper fluff, etc. from entering the recording ink 3].

次に動作について説明する。予備インク室３２から記録
インク３１が供給されてノズルプレート２１と圧力発生
部材４０の間隙及び圧力発生部材４０の近傍を充たす。Next, the operation will be explained. Recording ink 31 is supplied from the preliminary ink chamber 32 to fill the gap between the nozzle plate 21 and the pressure generating member 40 and the vicinity of the pressure generating member 40 .

一方、電気信号線２５．２４に電気信号が印加されると
第２図（ｂ）の矢印６０て示す方向に電流が流れ、発熱
層２６か発熱し急激に温度上昇する。発熱層２６に発生
した熱エネルギーは、隣接する記録インク３１と振動板
２３に伝導する。ここで、特に振動板２３の厚さ方向に
おける非定常的な熱伝導に注目すると、初期的には均等
な温度状態であった圧力発生部材４０において、発熱層
２６の発熱により圧力発生部材４０の内部に温度勾配が
発生すると伴に構成物質の持つ熱片張係数に起因する熱
応力が発生する。On the other hand, when an electric signal is applied to the electric signal lines 25 and 24, a current flows in the direction shown by the arrow 60 in FIG. Thermal energy generated in the heat generating layer 26 is conducted to the adjacent recording ink 31 and the diaphragm 23. Here, paying particular attention to the unsteady heat conduction in the thickness direction of the diaphragm 23, in the pressure generating member 40, which was initially in a uniform temperature state, the pressure generating member 40 increases due to the heat generated by the heat generating layer 26. As a temperature gradient occurs inside, thermal stress is generated due to the thermal extensibility coefficient of the constituent materials.

より具体的にはポリサルホンより構成された振動板２３
の発熱Ｎ２６側がより高温となり熱膨張しようとする内
部応力が発生し、逆に発熱層２６とは反対側のノズルプ
レート２１側は熱伝達の時間的遅れにより前記発熱層２
６側と比較して低い温度状態を示し、前記熱膨張を抑止
しようとする内部応力が発生ずる。この現象により圧力
発生部材４０には、曲げモーメントが発生し一端が固定
されている為にノズルプレート２１側に変形変位し、ノ
ズル開口２０近傍の記録インク３１をノズル開口２０よ
りインク滴として飛翔させる。次に、電気信号線２４．
２５への通電を停止することにより、圧力発生部材４０
に与えられた熱エネルギーは記録インク３１中に放熱し
圧力発生部材４゜内部は初期状態と同様な均等な温度分
布を持つに至り、次回インク滴吐出のための準備を完了
する。More specifically, a diaphragm 23 made of polysulfone
The heat generating layer 26 becomes hotter on the side of the heat generating layer 26, causing internal stress that tends to thermally expand, and conversely, the side of the nozzle plate 21 opposite to the heat generating layer 26 is heated due to a time delay in heat transfer.
The temperature state is lower than that on the 6th side, and internal stress is generated to suppress the thermal expansion. Due to this phenomenon, a bending moment is generated in the pressure generating member 40, and since one end is fixed, it is deformed and displaced toward the nozzle plate 21 side, causing the recording ink 31 near the nozzle opening 20 to fly as ink droplets from the nozzle opening 20. . Next, the electric signal line 24.
By stopping the energization to 25, the pressure generating member 40
The thermal energy given to the recording ink 31 is radiated into the recording ink 31, and the inside of the pressure generating member 4.degree. has a uniform temperature distribution similar to the initial state, completing preparations for the next ink droplet ejection.

第３図も本発明の他の実施例を示したインクジェットヘ
ッドの断面図であり、第２図の実施例と比較して圧力発
生部材４０と電気信号線２４．２５の別の構成を現わし
ている。ノズル開口２０と微小な空隙を持って対峙する
圧力発生部材４０は１層の発熱部材より成り、パターン
電極３５．３４が片面に設けられたスペーザ２２．３３
上に両端が固定された両持ち梁構造を取る。圧力発生部
材４０が両持ち梁構造であり発熱部材より成る為に、高
精度に管理する必要のあるノズルプレート２］−と圧力
発生部材４０の微小な間隙を精度よく製造することが可
能となる。FIG. 3 is also a sectional view of an inkjet head showing another embodiment of the present invention, showing a different configuration of the pressure generating member 40 and the electric signal lines 24, 25 compared to the embodiment of FIG. ing. The pressure generating member 40 facing the nozzle opening 20 with a small gap is made of a single layer of heat generating member, and includes a spacer 22, 33 with a pattern electrode 35, 34 provided on one side.
Take a double-supported beam structure with both ends fixed at the top. Since the pressure generating member 40 has a double-supported beam structure and is made of a heat generating member, it is possible to accurately manufacture a minute gap between the nozzle plate 2 and the pressure generating member 40, which must be managed with high precision. .

また、複数のノズル開口２０を有するマルチノズルイン
クジェットヘッドを構成する場合、圧力発生部材４０を
櫛歯状（図示せず）に一体製造することが容易となり、
製造歩留まりの良好なインクジェットヘッドを得ること
が可能となる。また、本実施例において圧力発生部材４
０が１層の発熱部材と該発熱部材の周囲を覆うＮ１メツ
キ等の薄膜層より構成された場合には、上記効果のほか
に記録インク３１と発熱体の腐食防止の効果も有する。Further, when configuring a multi-nozzle inkjet head having a plurality of nozzle openings 20, it is easy to integrally manufacture the pressure generating member 40 in a comb-like shape (not shown).
It becomes possible to obtain an inkjet head with a good manufacturing yield. In addition, in this embodiment, the pressure generating member 4
0 is composed of one layer of a heat-generating member and a thin film layer such as N1 plating surrounding the heat-generating member, in addition to the above-mentioned effects, it also has the effect of preventing corrosion of the recording ink 31 and the heat-generating element.

次に第３図に示した実施例の動作について説明する。電
気信号線２４．２５に電圧が印加されると圧力発生部材
４０の長手方向に電流が流れ発熱部材が温度上昇する。Next, the operation of the embodiment shown in FIG. 3 will be explained. When a voltage is applied to the electric signal lines 24 and 25, a current flows in the longitudinal direction of the pressure generating member 40, and the temperature of the heat generating member increases.

前記温度上昇により圧力発生部材４０に熱歪が発生し、
両端が固定端であるためノズルプレート２１方向に変形
変位し、ノズル開口２０近傍の記録インク３１をノズル
開口２０よりインク滴として飛翔させる。Thermal strain occurs in the pressure generating member 40 due to the temperature rise,
Since both ends are fixed ends, it is deformed and displaced in the direction of the nozzle plate 21, and the recording ink 31 near the nozzle opening 20 is ejected from the nozzle opening 20 as ink droplets.

第４図も本発明の他の実施例を示したインクジェットヘ
ッドの断面図であり、第２図の実施例と比較して圧力発
生部材４０及び電気信号線２４．２５の別の構成を現わ
している。本実施例の圧力発生部材４０も両端固定され
た両持ち梁構造を取り２種類の特性の異なる発熱部材３
６．３７の積層構造と成っている。ここて、前記特性と
しては、曲げ剛性の違い、定電圧に対する発熱量の違い
、線膨張係数の違い等が上げられる。また、圧力発生部
材４０が効率的な変形を行うために発熱部材３７は両固
定端距離よりも短く設定されていることが必要である。FIG. 4 is also a sectional view of an inkjet head showing another embodiment of the present invention, showing a different configuration of the pressure generating member 40 and the electric signal lines 24, 25 compared to the embodiment of FIG. ing. The pressure generating member 40 of this embodiment also has a double-supported beam structure with both ends fixed, and two types of heat generating members 3 with different characteristics are used.
It has a 6.37 layered structure. Here, the characteristics include a difference in bending rigidity, a difference in heat generation amount with respect to a constant voltage, a difference in linear expansion coefficient, etc. Further, in order for the pressure generating member 40 to deform efficiently, the heat generating member 37 must be set shorter than the distance between both fixed ends.

本実施例の上記構成によれば圧力発生部材４０が両持ち
梁構造を取るために高精度に管理する必要のあるノズル
プレート２１と圧力発生部材４０の微小な間隙を精度良
く製造することが可能となる。特性の異なる２種類の発
熱部材を使用しているために圧力発生部材４０の変形に
おいては、第２図の実施例に示した、圧力発生部材４０
内部に温度勾配に伴う熱歪が発生し曲げモーメントによ
り変形する効果と、第３図の実施例に示した、両端固定
された圧力発生部材４０全体が熱膨張することにより変
形する効果とを合成した効果を有する為に、より低エネ
ルギーによる駆動が可能となる。According to the above-mentioned configuration of this embodiment, it is possible to accurately manufacture a minute gap between the nozzle plate 21 and the pressure generating member 40, which needs to be managed with high precision because the pressure generating member 40 has a double-supported beam structure. becomes. Since two types of heat generating members with different characteristics are used, in the modification of the pressure generating member 40, the pressure generating member 40 shown in the embodiment of FIG.
The effect of deformation due to bending moment due to thermal strain occurring inside the temperature gradient, and the effect of deformation due to thermal expansion of the entire pressure generating member 40 fixed at both ends, shown in the embodiment of FIG. 3, are combined. Because of this effect, it is possible to drive with lower energy.

第５図も本発明の他の実施例であり、説明のために記録
インク流路のみを現わしている。記録インクはインク供
給口５５よりインクリザーバ５３に入る、インクリザー
バ５３にはノズル開口５０にそれぞれ１対１に対応して
設けられたインク流路への入口が設置されており、前記
記録インクはインク供給路５１、圧力発生室５２を経て
ノズル開口５０に到達する。前記記録インク流路は流路
形成部材の片面に形成された溝の上部にシート状部材を
接合することにより構成される。また前記流路形成部材
はポリサルホンの成型またはガラスをエツチングするこ
とにより構成される。圧力発生室５２のシート状部材上
部には発熱層５４が形成されており（説明のために１箇
所のみ図示）、発熱層５４に電気信号を印加する（配線
は図示せず）ことによりシート状部材と発熱層５４の積
層部が変形し圧力発生室５２に圧力が発生する、前記圧
力によりノズル開口近傍の記録インクがインク滴として
飛翔する。本実施例の上記構成によれば電気機械変換部
に圧電素子等の高価な材料を使用する必要がなく、圧力
発生室５２上部の発熱層５４形成手段としてもフォトリ
ソグラフィー、フォトニッティング等の技術を採用する
ことにより、圧電素子の接合と比較してより容易に安価
に良好なインクジェットヘッドを構成するという目的を
達成することが可能となる。FIG. 5 also shows another embodiment of the present invention, and only the recording ink flow path is shown for the sake of explanation. The recording ink enters the ink reservoir 53 from the ink supply port 55.The ink reservoir 53 is provided with inlet ports to ink flow paths provided in one-to-one correspondence with the nozzle openings 50, and the recording ink enters the ink reservoir 53 through the ink supply port 55. The ink reaches the nozzle opening 50 via the ink supply path 51 and the pressure generation chamber 52. The recording ink flow path is constructed by joining a sheet-like member to the top of a groove formed on one side of the flow path forming member. Further, the flow path forming member is formed by molding polysulfone or etching glass. A heat generating layer 54 is formed on the top of the sheet-like member of the pressure generating chamber 52 (only one location is shown for explanation), and by applying an electric signal to the heat generating layer 54 (wiring not shown), the sheet-like member is heated. The laminated portion of the member and the heat generating layer 54 is deformed and pressure is generated in the pressure generating chamber 52. The pressure causes the recording ink near the nozzle opening to fly as ink droplets. According to the above configuration of this embodiment, there is no need to use expensive materials such as piezoelectric elements in the electromechanical transducer, and techniques such as photolithography and photoknitting can also be used as a means for forming the heat generating layer 54 on the upper part of the pressure generating chamber 52. By employing this method, it is possible to achieve the purpose of constructing a good inkjet head more easily and inexpensively than by bonding piezoelectric elements.

〔発明の効果〕〔Effect of the invention〕

以上述べたように本発明の上記構成によれば、圧力発生
部材の形状精度が高精度に管理されインク滴吐出特性が
安定した、製造歩留まりの高い、低電圧で駆動可能な、
安価なインクジェットヘッドを実現することが可能とい
う効果を有する。また、ノズル開口間距離の短い高密度
に実装された（］２） 小型のマルチノズルインクジェットヘッドを容易に実現
することが可能という効果も有する。As described above, according to the above configuration of the present invention, the shape accuracy of the pressure generating member is managed with high precision, the ink droplet ejection characteristics are stable, the manufacturing yield is high, and it is possible to drive at low voltage.
This has the effect that it is possible to realize an inexpensive inkjet head. It also has the effect that it is possible to easily realize a compact multi-nozzle inkjet head (2) that is densely mounted with a short distance between nozzle openings.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明による一実施例を示すインクシェドヘッ
ドを具備したプリンタの斜視図。　第２図（ａ）、（ｂ
）は本発明による一実施例を示すインクジェットヘッド
の断面図。　第３図も本発明による一実施例を示すイン
クジェットヘッドの断面図。 第４図も本発明による一実施例を示すインクジェットヘ
ッドの断面図。 第５図も本発明による一実施例を示したインクジェット
ヘッドの記録インク流路を示した図。 １０　記録紙 １６　インクジェットヘッド ２０　ノズル開口 ２１　ノズルプレート ２４．２５　電気配線 ３１　記録インク ４０　圧力発生部材 以上 出願人　　セイコーエプソン株式会社 代理人　弁理士　鈴木喜三部　他１名FIG. 1 is a perspective view of a printer equipped with an ink shed head showing one embodiment of the present invention. Figure 2 (a), (b)
) is a sectional view of an inkjet head showing one embodiment of the present invention. FIG. 3 is also a sectional view of an inkjet head showing an embodiment according to the present invention. FIG. 4 is also a sectional view of an inkjet head showing an embodiment of the present invention. FIG. 5 also shows a recording ink flow path of an inkjet head showing an embodiment of the present invention. 10 Recording paper 16 Inkjet head 20 Nozzle opening 21 Nozzle plate 24.25 Electrical wiring 31 Recording ink 40 Pressure generating member and above Applicant Seiko Epson Co., Ltd. agent Patent attorney Kizobe Suzuki and 1 other person

Claims (5)

【特許請求の範囲】[Claims] （１）少なくとも１つ以上のノズル開口を有するノズル
形成部材と、前記ノズル開口に対応して配設された前記
ノズル開口近傍の記録インクにインク滴としての飛翔が
可能な圧力を発生させる圧力発生手段とを備え、該圧力
発生手段が熱歪を圧力に変換する如く構成されることを
特徴とするインクジェットヘッド。(1) A nozzle forming member having at least one or more nozzle openings, and pressure generation that generates pressure that enables recording ink near the nozzle openings arranged in correspondence with the nozzle openings to fly as ink droplets. An inkjet head comprising: means for generating pressure, wherein the pressure generating means is configured to convert thermal strain into pressure. （２）圧力発生手段が少なくとも１層以上の板部材と該
板部材の片面に接合された発熱層との積層構造からなる
ことを特徴とする請求項１のインクジェットヘッド。(2) The inkjet head according to claim 1, wherein the pressure generating means has a laminated structure of at least one plate member and a heat generating layer bonded to one side of the plate member. （３）圧力発生手段が１層の発熱部材で構成されること
を特徴とする請求項１のインクジェットヘッド。(3) The inkjet head according to claim 1, wherein the pressure generating means is composed of a single layer of heat generating member. （４）圧力発生手段が互いに独立して制御可能な２層以
上の発熱部材の積層で構成されていることを特徴とする
請求項１のインクジェットヘッド。(4) The inkjet head according to claim 1, wherein the pressure generating means is composed of a stack of two or more layers of heat generating members that can be controlled independently of each other. （５）圧力発生手段が線膨張率の異なる２種類以上の発
熱部材の積層で構成されていることを特徴とする請求項
１のインクジェットヘッド。(5) The inkjet head according to claim 1, wherein the pressure generating means is composed of a laminate of two or more types of heat generating members having different coefficients of linear expansion.
JP18240188A 1988-07-21 1988-07-21 Ink jet head Pending JPH0230543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18240188A JPH0230543A (en) 1988-07-21 1988-07-21 Ink jet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18240188A JPH0230543A (en) 1988-07-21 1988-07-21 Ink jet head

Publications (1)

Publication Number Publication Date
JPH0230543A true JPH0230543A (en) 1990-01-31

Family

ID=16117665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18240188A Pending JPH0230543A (en) 1988-07-21 1988-07-21 Ink jet head

Country Status (1)

Country Link
JP (1) JPH0230543A (en)

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