JPH064327B2 - Inkjet recording device - Google Patents
Inkjet recording deviceInfo
- Publication number
- JPH064327B2 JPH064327B2 JP59233834A JP23383484A JPH064327B2 JP H064327 B2 JPH064327 B2 JP H064327B2 JP 59233834 A JP59233834 A JP 59233834A JP 23383484 A JP23383484 A JP 23383484A JP H064327 B2 JPH064327 B2 JP H064327B2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- recording apparatus
- jet recording
- substrate
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- 230000004044 response Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005499 meniscus Effects 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
- B41J2/14088—Structure of heating means
- B41J2/14112—Resistive element
- B41J2/1412—Shape
-
- 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
- B41J2/1404—Geometrical characteristics
-
- 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
- B41J2002/14387—Front shooter
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、インクジェット記録装置に関し、さらに詳細
には熱エネルギーによりインク滴を吐出するインクジェ
ット記録装置に関する。TECHNICAL FIELD The present invention relates to an inkjet recording apparatus, and more particularly to an inkjet recording apparatus that ejects ink droplets by thermal energy.
従来のインクジェット記録装置は、圧電素子等によりイ
ンク室を加圧し、ノズルからインク滴を吐出して記録媒
体にインク像を記録するインクジェット記録装置と、特
開昭５９−９５１５４号公報や特開昭５９−５２６６４
号公報に記載されているような、インクを加熱してその
圧力でインク滴を吐出し、記録媒体にインク像を記録す
るインクジェット記録装置が提案されている。A conventional ink jet recording apparatus is an ink jet recording apparatus that pressurizes an ink chamber with a piezoelectric element or the like and ejects ink droplets from a nozzle to record an ink image on a recording medium. 59-52664
There is proposed an ink jet recording apparatus as described in Japanese Patent Laid-Open Publication No. Hei 11 (1999) -135200, which heats ink and ejects ink droplets at the pressure to record an ink image on a recording medium.
後者のインクジェット記録装置は、高密度化、高速化の
点で優れており注目されている。The latter ink jet recording apparatus is attracting attention because it is excellent in high density and high speed.
しかし、従来の特開昭５９−９５１５４号公報記載のイ
ンクジェット記録装置では、流路が平面的に広がってお
り、発熱体がその流路にノズルに対向して配置されてい
るため、発熱体から発生した熱エネルギーによる圧力
が、ノズル方向のみならず四方に分散してしまい、吐出
圧力が弱くなるという問題を有している。However, in the conventional ink jet recording apparatus described in Japanese Patent Laid-Open No. 59-95154, the flow passage is widened in a plane and the heating element is arranged in the flow passage so as to face the nozzle. There is a problem that the pressure due to the generated thermal energy is dispersed not only in the nozzle direction but also in all directions, and the discharge pressure becomes weak.
また、特開昭５９−５２６６４号公報記載のインクジェ
ット記録装置には、ノズルプレートに突起を設けて発熱
体周辺のインク流路を狭めている構成が記載されてい
る。しかしこの構成では、ノズル方向への吐出圧力は特
開昭５９−９５１５４号公報記載のインクジェット記録
装置に比べ大きいものの、インク供給路が狭められてい
るため、インク供給が遅く吐出応答性が遅いという問題
がある。さらに、ノズル側に突起を有し、且つ発熱体近
傍にインク供給口を配置しているため、ノズル側の抵抗
が大きく、また、バルブ発生時の圧力が発熱体近傍の供
給口から逃げてしまい、吐出口率に問題があった。Further, the ink jet recording apparatus described in JP-A-59-52664 has a structure in which a projection is provided on a nozzle plate to narrow an ink flow path around a heating element. However, in this configuration, although the ejection pressure in the nozzle direction is higher than that of the ink jet recording apparatus disclosed in Japanese Patent Laid-Open No. 59-95154, the ink supply path is narrowed, so that the ink supply is slow and the ejection response is slow. There's a problem. Furthermore, since the nozzle side has a protrusion and the ink supply port is arranged near the heating element, the resistance on the nozzle side is large, and the pressure at the time of valve generation escapes from the supply port near the heating element. There was a problem with the discharge rate.
本発明のインクジェット記録装置はかかる問題を解決す
るもので、吐出圧力が弱まらず、吐出応答性、吐出効率
のよいインクジェット記録装置を提供することにある。The ink jet recording apparatus of the present invention solves such a problem, and an object of the present invention is to provide an ink jet recording apparatus that does not weaken the ejection pressure and has good ejection response and ejection efficiency.
本発明のインクジェット記録装置は、インク滴を吐出す
るためのノズルを有するノズルプレートと、前記ノズル
プレートのと間に間隔を設けてインク供給路を形成する
とともに、発熱体を設けた凹部を前記ノズルに対向させ
て設けた基板と、を有することを特徴とする。The ink jet recording apparatus of the present invention forms a nozzle plate having a nozzle for ejecting ink droplets, forms an ink supply path with a gap between the nozzle plate, and forms a concave portion provided with a heating element with the nozzle. And a substrate provided so as to face the substrate.
また、前記基板の前記凹部の側壁に前記発熱体を設けた
ことを特徴とする。Further, the heating element is provided on a side wall of the recess of the substrate.
以下、実施例を基に本発明を説明する。 Hereinafter, the present invention will be described based on examples.
第１図は本発明のインクジェット記録装置の第１実施例
であり、ノズル２を有する基板（ノズルプレート）と基
板３に挟まれた領域がインク流路７となっている。基板
３には、ノズル２に対向する部分に凹部を有しており、
その凹部の中に発熱体４が設けられている。FIG. 1 shows a first embodiment of an ink jet recording apparatus of the present invention, and an area sandwiched between a substrate (nozzle plate) having nozzles 2 and a substrate 3 is an ink flow path 7. The substrate 3 has a concave portion in a portion facing the nozzle 2,
The heating element 4 is provided in the recess.
発熱体４を発熱させるとバブル５が発生し、そのバブル
５の成長につれてインクが押し退けられインク液滴６が
形成され、発射される。バブルが成長するとき、基板３
に凹部を有するため流路方向にインクの逃げ場がなく、
インクは全てノズル方向の運動量成分を与えられて押し
退けられるため、より強いインク滴吐出圧を発生するこ
とができる。また、バブル発生時において、液体より熱
伝導性のよい壁面にバブルが接するため冷却がよく応答
性が向上する。さらに、ノズルプレートと基板の間に間
隔を設けてインク流路を形成しているため、複数方向か
らインクの供給が行われ、多めのインクがバブル消失時
に発熱体上に流れ込み、冷却が早く吐出応答性が向上す
る。When the heating element 4 is made to generate heat, a bubble 5 is generated, and as the bubble 5 grows, the ink is pushed away and an ink droplet 6 is formed and ejected. When the bubble grows, substrate 3
Since there is a recess in the ink, there is no escape area for the ink in the flow direction,
Since all of the ink is given a momentum component in the nozzle direction and is pushed away, a stronger ink droplet ejection pressure can be generated. Further, when a bubble is generated, the bubble comes into contact with the wall surface having better thermal conductivity than the liquid, so that the cooling is good and the responsiveness is improved. Furthermore, since the ink flow path is formed with a gap between the nozzle plate and the substrate, ink is supplied from multiple directions, and a large amount of ink flows into the heating element when the bubbles disappear, and the ink is cooled quickly. Responsiveness is improved.
第２図は、本発明のインクジェット記録装置の第２の実
施例を示すものであり、基板３側の凹部の側壁面に発熱
体４を複数設けたものである。FIG. 2 shows a second embodiment of the ink jet recording apparatus of the present invention, in which a plurality of heating elements 4 are provided on the side wall surface of the recess on the substrate 3 side.
この構成によれば、凹部の低面積を小さくしても発熱体
の面積がとれるため、高密度化が可能になる。According to this structure, the area of the heat generating element can be taken even if the low area of the recess is reduced, so that the density can be increased.
なお、本発明においては、ノズルプレートと対向する基
板に凹部を形成したが、必ずしも基板でなくてもよく、
別部材によって凹部を形成してもよいことは勿論であ
る。In addition, in the present invention, the concave portion is formed in the substrate facing the nozzle plate, but it is not necessarily the substrate,
Of course, the recess may be formed by another member.
以上述べたように本発明によれば、基板の凹部に発熱体
を配置したことにより、バブル発生時に生じる圧力のう
ち流路方向に逃げる成分を減少させ、圧力を効率よくイ
ンク吐出方向に向けさせることができるとともに、凹部
の壁面によりバブルの冷却を早め、吐出応答性を向上さ
せることができる。また、隣接するインク吐出口におけ
るクロストークを防止することもできる。As described above, according to the present invention, by disposing the heating element in the concave portion of the substrate, the component that escapes in the flow path direction in the pressure generated when the bubble is generated is reduced, and the pressure is efficiently directed in the ink ejection direction. In addition, it is possible to accelerate the cooling of the bubbles by the wall surface of the concave portion and improve the ejection response. It is also possible to prevent crosstalk between adjacent ink ejection ports.
さらに、基板の凹部上に一定の間隔でインク層が形成さ
れているため、多めのインクが凹部内に流れ込み易く、
バブル消失時においては、バブル及び発熱体の冷却を早
く行うことができるとともに、インク供給も早くでき、
吐出応答性が向上する。またこれと同時に、インク吐出
口がインク層上に形成されているため、インク吐出後の
インク吐出口へのインク供給も早く、メニスカスの安定
が早くなり吐出応答性が向上する。Furthermore, since the ink layer is formed at regular intervals on the concave portion of the substrate, a large amount of ink easily flows into the concave portion,
When the bubble disappears, the bubble and the heating element can be cooled quickly, and the ink can be supplied quickly.
The ejection response is improved. At the same time, since the ink ejection port is formed on the ink layer, the ink is quickly supplied to the ink ejection port after the ink is ejected, the meniscus is stabilized quickly, and the ejection response is improved.
第１図は本発明のインクジェット記録ヘッドの第１実施
例の主要断面図。 第２図は本発明のインクジェット記録ヘッドの第２実施
例の主要断面図。FIG. 1 is a main sectional view of a first embodiment of an ink jet recording head of the present invention. FIG. 2 is a main sectional view of a second embodiment of the ink jet recording head of the present invention.
Claims (1)
ートの平坦な背面に対しほぼ一定の間隔をおいて並行に
配設した基板の対向面に、上記ノズルプレートに設けた
ノズルに対向させて凹部を形成するとともに、該凹部内
にインクを加熱させる発熱体を設けたことを特徴とする
インクジェット記録装置。1. A nozzle provided on the nozzle plate is opposed to a facing surface of a substrate which is arranged in parallel with a flat back surface of the nozzle plate at a substantially constant interval to form a uniform ink flow path. An ink jet recording apparatus, characterized in that a concave portion is formed as a result and a heating element for heating ink is provided in the concave portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59233834A JPH064327B2 (en) | 1984-11-06 | 1984-11-06 | Inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59233834A JPH064327B2 (en) | 1984-11-06 | 1984-11-06 | Inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61110559A JPS61110559A (en) | 1986-05-28 |
| JPH064327B2 true JPH064327B2 (en) | 1994-01-19 |
Family
ID=16961292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59233834A Expired - Lifetime JPH064327B2 (en) | 1984-11-06 | 1984-11-06 | Inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064327B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2782690B2 (en) * | 1988-04-06 | 1998-08-06 | 株式会社リコー | Liquid jet recording head |
| DE60126869T2 (en) * | 2000-07-11 | 2007-11-08 | Samsung Electronics Co., Ltd., Suwon | Bubble-type ink-jet printhead |
| US8382255B2 (en) * | 2009-10-27 | 2013-02-26 | Hewlett-Packard Development Company, L.P. | Thermal inkjet printhead with heating element in recessed substrate cavity |
| JP6335599B2 (en) * | 2013-05-02 | 2018-05-30 | キヤノン株式会社 | Liquid discharge head and ink jet recording apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS588660A (en) * | 1981-07-09 | 1983-01-18 | Canon Inc | liquid jet recording head |
-
1984
- 1984-11-06 JP JP59233834A patent/JPH064327B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61110559A (en) | 1986-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |