JPH02137930A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPH02137930A JPH02137930A JP29155188A JP29155188A JPH02137930A JP H02137930 A JPH02137930 A JP H02137930A JP 29155188 A JP29155188 A JP 29155188A JP 29155188 A JP29155188 A JP 29155188A JP H02137930 A JPH02137930 A JP H02137930A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- chambers
- chamber
- inkjet head
- heaters
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000005485 electric heating Methods 0.000 claims description 14
- 230000006866 deterioration Effects 0.000 abstract description 6
- 238000007639 printing Methods 0.000 abstract description 5
- 239000000976 ink Substances 0.000 abstract 6
- 238000000034 method Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 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
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14032—Structure of the pressure chamber
- B41J2/14064—Heater chamber separated from ink chamber by a membrane
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、インクジェット・プリンタを構成するインク
ジェット・ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an inkjet head that constitutes an inkjet printer.
（従来の技術）
インクジェット・プリンタを構成するインクジエフ）・
ヘッドにおいては各種の噴射方式が採用されているが、
その一つにバブルジェット方式がある。(Conventional technology)
Various jetting methods are used in heads, but
One of them is the bubble jet method.
このバブルジェット方式は、第５図の断面図に示すよう
に、ヘッド前方に形成されたインク吐出口２１と、この
インク吐出口２１にインクを供給するインク室２２と、
このインク室内に設置された電気発熱体２３と、この電
気発熱体に電力を供給する通電回路（図示せず）を備え
ている。この電気発熱体２３に対し瞬間的に大電力を供
給してこれを加熱すると、第６図に示すように、インク
室内に気泡（バブル）３０が急激に発生して膨張し、こ
のバブルの容積にほぼ等しい分量のインク滴が吐出口２
１の前方に噴射される。As shown in the cross-sectional view of FIG. 5, this bubble jet method includes an ink discharge port 21 formed in front of the head, an ink chamber 22 that supplies ink to the ink discharge port 21, and an ink chamber 22 that supplies ink to the ink discharge port 21.
The ink chamber includes an electric heating element 23 installed in the ink chamber and an energizing circuit (not shown) for supplying power to the electric heating element. When a large amount of power is instantaneously supplied to this electric heating element 23 to heat it, bubbles 30 are rapidly generated and expanded in the ink chamber as shown in FIG. An amount of ink droplets approximately equal to
It is injected in front of 1.
（発明が解決しようとする課題）
上記従来のバブルジェット方式のインクジェット・ヘッ
ドでは、インク自体を電気発熱体によって加熱する構成
となっているため、インクが温度上昇に伴って変質した
り、不純物の発生に伴って劣化したりするという問題が
ある。特に、インクを連続的に噴射して印字に不要な部
分をガータで回収して再使用するという連続噴射方式の
インクジェット・ヘッドでは、繰り返し加熱の行われる
インクの変質や劣化が問題になる。(Problems to be Solved by the Invention) In the conventional bubble jet type inkjet head described above, the ink itself is heated by an electric heating element, so the ink may change in quality as the temperature rises or contain impurities. There is a problem that it deteriorates as it occurs. Particularly in continuous-jet inkjet heads, in which ink is continuously ejected and parts unnecessary for printing are collected by a gutter and reused, alteration and deterioration of the ink due to repeated heating becomes a problem.
（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、ヘッド前方に形成
されたインク吐出口と、このインク吐出口にインクを供
給するインク室と、このインク室に弾性隔膜を介して接
すると共に気体が充填された気体室と、この気体室内に
設置された電気発熱体と、この電気発熱体に電力を供給
する通電回路とを備え、弾性隔膜で隔てた気体を加熱・
膨張させてインク滴を噴射させることにより、インクの
変質や劣化を有効に防止するように構成されている。(Means for Solving the Problems) The inkjet head of the present invention includes an ink ejection port formed at the front of the head, an ink chamber for supplying ink to the ink ejection port, and an ink chamber connected to the ink chamber via an elastic diaphragm. It is equipped with a gas chamber that is in contact with the gas chamber and is filled with gas, an electric heating element installed in the gas chamber, and an energizing circuit that supplies power to the electric heating element, and is capable of heating and heating the gas separated by an elastic diaphragm.
By expanding and ejecting ink droplets, the ink is configured to effectively prevent deterioration and deterioration of the ink.
以下、本発明の作用を実施例と共に詳細に説明する。Hereinafter, the operation of the present invention will be explained in detail together with examples.
（実施例）
第１図と第２図は、それぞれ本発明の一実施例のインク
ジェット・ヘッドの構成を示す断面図であり、第１図は
第２図中のＡ−Ａ”断面図、第２図は第１図中のＢ−Ｂ
’断面図となっている。(Embodiment) FIGS. 1 and 2 are sectional views showing the structure of an inkjet head according to an embodiment of the present invention, respectively. Figure 2 shows B-B in Figure 1.
'This is a cross-sectional view.
このインクジェット・ヘッドにおいて、インクの流れの
方向に直交する方向に、ｎ個のインク室２ａ、２ｂ、２
ｃ・・・・２ｎが形成され、各インク室の先端部分には
、インク吐出口１ａ、ｌｂ。In this inkjet head, there are n ink chambers 2a, 2b, 2 in a direction perpendicular to the direction of ink flow.
c...2n are formed, and ink ejection ports 1a and lb are formed at the tip of each ink chamber.
ｌｃ・・・・Ｉｎが形成される。すなわち、従来のバブ
ルジェット方式におけるものと同様に、ヘッド後方に形
成される共通のインク室（図示せず）から技分かれした
ｎ個のインク室３ａ〜３ｎを通してインク吐出口１ａ〜
１ｎのそれぞれにインクが供給される。インク室’ｌａ
、 ２ｂ、’ｌｃ・・・・２ｎの途中には、弾性隔膜
４によって各インク室と接する空気室３ａ、３ｂ、３ｃ
・・・・３ｎが形成される。この弾性隔膜４は、伸縮性
、耐熱性、気密性に冨むゴムなどの材料で構成されてお
り、対応の空気室を大気圧程度の空気による充填状態に
保つ。lc...In is formed. That is, similar to the conventional bubble jet system, ink ejection ports 1a to 1a are emitted through n ink chambers 3a to 3n divided from a common ink chamber (not shown) formed at the rear of the head.
Ink is supplied to each of 1n. Ink chamber'la
, 2b, 'lc...2n, air chambers 3a, 3b, 3c are in contact with each ink chamber through an elastic diaphragm 4.
...3n is formed. The elastic diaphragm 4 is made of a material such as rubber that is stretchable, heat resistant, and airtight, and keeps the corresponding air chamber filled with air at approximately atmospheric pressure.
空気室３ａ〜３ｎの内部において、ヒータ５ａ〜５ｎと
これらヒータのそれぞれに電力を供給する給電線の対（
６ａ、７ａ）〜（６ｎ、 ７ ｎ）が絶縁性の基板８
上に形成されている。給電線の対（６ａ、７ａ）〜（６
ｎ、 ７ ｎ）を含む各通電回路は、印字情報に従っ
てヒータ５ａ〜５ｎのそれぞれに選択的にかつ間歇的に
電力を供給することにより、対応の空気室内に充填され
ている空気を選択的に急加熱して膨張させる。例えば、
ヒータ５ｂ、５ｃ、５ｅだけに電力が供給され、空気室
３ｂ、３ｃ、３ｅ内だけの空気が加熱されて急激に膨張
したとすれば、第３図と第４図の断面図に例示するよう
に、膨張した弾性隔膜４によってインク室２ｂ、２ｃ、
２ｅの容積が狭ばめられ、この狭められた分量のインク
が対応のインク吐出口ｌｂ、ｌｃ、ｌｅからヘッドの前
方に噴射され、図示しないプラテン上の紙面に付着する
。Inside the air chambers 3a to 3n, heaters 5a to 5n and pairs of power supply lines (
6a, 7a) to (6n, 7n) are insulating substrates 8
formed on top. Pairs of feeder lines (6a, 7a) to (6
Each of the energizing circuits including the heaters 5a to 7n selectively and intermittently supply power to each of the heaters 5a to 5n according to the printed information, thereby selectively discharging the air filled in the corresponding air chamber. Heat rapidly and expand. for example,
If power is supplied only to the heaters 5b, 5c, and 5e, and the air only in the air chambers 3b, 3c, and 3e is heated and expands rapidly, the air will expand rapidly as shown in the cross-sectional views of FIGS. The ink chambers 2b, 2c,
The volume of 2e is narrowed, and the narrowed amount of ink is ejected from the corresponding ink ejection ports lb, lc, and le to the front of the head and adheres to the paper surface on a platen (not shown).
膨張した空気室内の空気は、弾性隔膜を介してインクに
よる冷却を受けて収縮し、加熱前の状態に復帰する。The expanded air in the air chamber is cooled by the ink through the elastic diaphragm and contracts, returning to the state before heating.
以上、インク吐出口、インク室、気体室、電気発熱体及
び通電回路の組がインクの流れと直交する方向に複数形
成され、それぞれの組の発熱体には印字情報に従って選
択的かつ間歇的な通電が行われるオンデマンド型のイン
クジェット・ヘッドの場合について本発明を説明した。As described above, a plurality of sets of ink ejection ports, ink chambers, gas chambers, electric heating elements, and energizing circuits are formed in a direction perpendicular to the flow of ink, and each set of heating elements is selectively and intermittently operated according to printed information. The present invention has been described in the case of an on-demand inkjet head that is energized.
しかしながら、各通電回路が対応の電気発熱体に対し周
期的な通電を行い、印字に不要な部分はガータを介して
回収する構成の連続型のインクジェット・ヘッドに対し
ても本発明を適用することもできる。この連続型におい
て、印字に必要なインクと不要なインクとを選別するた
めの偏向機構は、荷電電極と偏向電極の組合せによる静
電偏向機構など適宜な形式のものを適用できる。However, the present invention can also be applied to a continuous type inkjet head in which each energizing circuit periodically energizes a corresponding electric heating element, and parts unnecessary for printing are collected via a gutter. You can also do it. In this continuous type, an appropriate type of deflection mechanism for separating ink necessary for printing from ink unnecessary for printing can be applied, such as an electrostatic deflection mechanism using a combination of a charging electrode and a deflection electrode.
更に、インク吐出口が一つだけで、記録用紙の主走査で
バーコードなどの簡単な記号などを印刷する簡易なイン
クジェット・ヘッドなどにも本発明を適用できる。Further, the present invention can also be applied to a simple inkjet head that has only one ink ejection port and prints simple symbols such as bar codes by main scanning of recording paper.
（発明の効果）
以上詳細に説明したように、本発明のインクジェット・
ヘッドは、弾性隔膜で隔てた気体を加熱・膨張させてイ
ンク滴を噴射させることにより、インクを直接加熱する
従来のバブルジェット方式で問題となるインクの変質や
劣化を有効に防止できるという効果が奏される。(Effects of the Invention) As explained in detail above, the inkjet printer of the present invention
The head heats and expands gas separated by an elastic diaphragm to eject ink droplets, effectively preventing the deterioration and deterioration of ink that is a problem with conventional bubble jet methods that directly heat ink. It is played.
第１図乃至第４図は本発明の一実施例に係わるインクジ
ェット・ヘッドの構成を示す断面図、第５図と第６図は
従来のバブルジェット型のインクシェフ）・ヘッドの構
成を示す断面図である。
１ａ〜１ｎ・・・インク吐出口、２ａ〜２ｎ・・・イン
ク室、３ａ〜３ｎ・・・空気室、４・・・弾性隔膜、５
ａ〜５ｎ・・・発熱体、（６ａ。
７ａ）〜（６ｎ〜７ｎ） ・・・各通電回路に含まれ
る給電線の対、８・・・絶縁基板。
特許出願人 日本電気ホームエレクトロニクス株式会社1 to 4 are cross-sectional views showing the structure of an inkjet head according to an embodiment of the present invention, and FIGS. 5 and 6 are cross-sectional views showing the structure of a conventional bubble jet type ink chef head. It is a diagram. 1a to 1n... Ink discharge port, 2a to 2n... Ink chamber, 3a to 3n... Air chamber, 4... Elastic diaphragm, 5
a to 5n...Heating element, (6a. 7a) to (6n to 7n)...Pair of power supply lines included in each energizing circuit, 8...Insulating substrate. Patent applicant: NEC Home Electronics Co., Ltd.
Claims (5)
ンク吐出口にインクを供給するインク室と、 このインク室に弾性隔膜を介して接すると共に気体が充
填された気体室と、 この気体室内に設置された電気発熱体と、 この電気発熱体に電力を供給する通電回路とを備えたこ
とを特徴とするインクジェット・ヘッド。(1) An ink discharge port formed in the front of the head, an ink chamber that supplies ink to the ink discharge port, a gas chamber that is in contact with the ink chamber through an elastic diaphragm and is filled with gas, and this gas chamber An inkjet head characterized by comprising: an electric heating element installed in the inkjet head; and an energizing circuit that supplies power to the electric heating element.
電を行う手段を備えたことを特徴とする特許請求の範囲
第１項記載のインクジェット・ヘッド。(2) The inkjet head according to claim 1, wherein the energizing circuit includes means for periodically energizing the electric heating element.
応じた間歇的な通電を行う手段を備えたことを特徴とす
る特許請求の範囲第１項記載のインクジェット・ヘッド
。(3) The inkjet head according to claim 1, wherein the energizing circuit includes means for intermittently energizing the electric heating element in accordance with print information.
体及び通電回路の組は、インクの流れと直交する方向に
複数形成され、全ての組の発熱体に周期的な通電が行わ
れることを特徴とする特許請求の範囲第１項記載のイン
クジェット・ヘッド。(4) A plurality of sets of the ink ejection ports, ink chambers, gas chambers, electric heating elements, and energizing circuits are formed in a direction perpendicular to the flow of ink, and the heating elements of all sets are periodically energized. An inkjet head according to claim 1, characterized in that:
体及び通電回路の組は、インクの流れと直交する方向に
複数形成され、それぞれの組の発熱体には印字情報に従
って選択的かつ間歇的な通電が行われることを特徴とす
る特許請求の範囲第１項記載のインクジェット・ヘッド
。(5) A plurality of sets of the ink ejection ports, ink chambers, gas chambers, electric heating elements, and energizing circuits are formed in a direction perpendicular to the ink flow, and each set of heating elements is selectively and electrically heated according to the printed information. 2. The inkjet head according to claim 1, wherein the inkjet head is energized intermittently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29155188A JPH02137930A (en) | 1988-11-18 | 1988-11-18 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29155188A JPH02137930A (en) | 1988-11-18 | 1988-11-18 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02137930A true JPH02137930A (en) | 1990-05-28 |
Family
ID=17770380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29155188A Pending JPH02137930A (en) | 1988-11-18 | 1988-11-18 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02137930A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0811492A2 (en) * | 1996-06-07 | 1997-12-10 | Canon Kabushiki Kaisha | Liquid discharge method and liquid discharge apparatus |
| EP0816083A2 (en) * | 1996-06-27 | 1998-01-07 | Samsung Electronics Co., Ltd. | Ink spraying device and method |
| EP0841166A2 (en) * | 1996-11-08 | 1998-05-13 | SAMSUNG ELECTRONICS Co. Ltd. | Spray device for ink-jet printer |
| EP0882589A2 (en) * | 1997-06-06 | 1998-12-09 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| EP0882890A3 (en) * | 1997-06-06 | 1999-09-29 | Canon Kabushiki Kaisha | A liquid carrying method, a liquid carrying apparatus, and a liquid discharging method and a liquid discharge head utilizing such liquid carrying method and apparatus |
| EP0882592A3 (en) * | 1997-06-06 | 1999-09-29 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| KR100526693B1 (en) * | 1999-05-19 | 2005-11-08 | 제일모직주식회사 | Ink jet printer head |
| EP1834091A2 (en) * | 2004-12-14 | 2007-09-19 | Medipacs, Inc. | Actuator pump system |
| US9995295B2 (en) | 2007-12-03 | 2018-06-12 | Medipacs, Inc. | Fluid metering device |
| US10000605B2 (en) | 2012-03-14 | 2018-06-19 | Medipacs, Inc. | Smart polymer materials with excess reactive molecules |
| US10208158B2 (en) | 2006-07-10 | 2019-02-19 | Medipacs, Inc. | Super elastic epoxy hydrogel |
-
1988
- 1988-11-18 JP JP29155188A patent/JPH02137930A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5943074A (en) * | 1996-06-07 | 1999-08-24 | Canon Kabushiki Kaisha | Liquid discharge method and liquid discharge apparatus |
| EP0811492A3 (en) * | 1996-06-07 | 1998-08-12 | Canon Kabushiki Kaisha | Liquid discharge method and liquid discharge apparatus |
| EP0811492A2 (en) * | 1996-06-07 | 1997-12-10 | Canon Kabushiki Kaisha | Liquid discharge method and liquid discharge apparatus |
| EP0816083A2 (en) * | 1996-06-27 | 1998-01-07 | Samsung Electronics Co., Ltd. | Ink spraying device and method |
| EP0816083A3 (en) * | 1996-06-27 | 1998-09-16 | Samsung Electronics Co., Ltd. | Ink spraying device and method |
| EP0841166A2 (en) * | 1996-11-08 | 1998-05-13 | SAMSUNG ELECTRONICS Co. Ltd. | Spray device for ink-jet printer |
| EP0841166A3 (en) * | 1996-11-08 | 1998-09-16 | SAMSUNG ELECTRONICS Co. Ltd. | Spray device for ink-jet printer |
| EP0882589A3 (en) * | 1997-06-06 | 1999-09-29 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| EP0882890A3 (en) * | 1997-06-06 | 1999-09-29 | Canon Kabushiki Kaisha | A liquid carrying method, a liquid carrying apparatus, and a liquid discharging method and a liquid discharge head utilizing such liquid carrying method and apparatus |
| EP0882592A3 (en) * | 1997-06-06 | 1999-09-29 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| EP0882589A2 (en) * | 1997-06-06 | 1998-12-09 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| US6206505B1 (en) | 1997-06-06 | 2001-03-27 | Canon Kabushiki Kaisha | Liquid carrying method, a liquid carrying apparatus, and a liquid discharging method and a liquid discharge head utilizing such liquid carrying method and apparatus |
| US6276783B1 (en) | 1997-06-06 | 2001-08-21 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| US6286940B1 (en) | 1997-06-06 | 2001-09-11 | Canon Kabushiki Kaisha | Method for discharge of liquid and liquid discharge head |
| KR100526693B1 (en) * | 1999-05-19 | 2005-11-08 | 제일모직주식회사 | Ink jet printer head |
| EP1834091A2 (en) * | 2004-12-14 | 2007-09-19 | Medipacs, Inc. | Actuator pump system |
| EP1834091A4 (en) * | 2004-12-14 | 2009-12-09 | Medipacs Inc | Actuator pump system |
| US7859168B2 (en) | 2004-12-14 | 2010-12-28 | Medipacs, Inc. | Actuator pump system |
| AU2005317188B2 (en) * | 2004-12-14 | 2011-06-09 | Mark Banister | Actuator pump system |
| US8138656B2 (en) | 2004-12-14 | 2012-03-20 | Mediapacs, Inc. | Actuator pump system |
| US10208158B2 (en) | 2006-07-10 | 2019-02-19 | Medipacs, Inc. | Super elastic epoxy hydrogel |
| US9995295B2 (en) | 2007-12-03 | 2018-06-12 | Medipacs, Inc. | Fluid metering device |
| US10000605B2 (en) | 2012-03-14 | 2018-06-19 | Medipacs, Inc. | Smart polymer materials with excess reactive molecules |
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