JPS5998859A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPS5998859A JPS5998859A JP20953482A JP20953482A JPS5998859A JP S5998859 A JPS5998859 A JP S5998859A JP 20953482 A JP20953482 A JP 20953482A JP 20953482 A JP20953482 A JP 20953482A JP S5998859 A JPS5998859 A JP S5998859A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- air
- pressure
- nozzle
- common ink
- 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
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
- B41J2/015—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
- B41J2/055—Devices for absorbing or preventing back-pressure
Abstract
Description
【発明の詳細な説明】
本発明は、ドロップオンティマントタイプのマルチノズ
ルインクジェットヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drop-on-timant type multi-nozzle inkjet head.
従来のドロップオンディマントタイプのマルチノズルイ
ンクジェットヘッドには、１つのノズル噴射のための圧
力パルスが他のノズルに共通インク室同全通して伝わり
、噴射が不安定になり、特に繰返し噴射周波数を上げて
いくと互いの干渉にｘＤノズルからを気を吸い込みイン
クを噴射しなくなるという欠点がめった。In conventional drop-on demand type multi-nozzle inkjet heads, the pressure pulse for jetting from one nozzle is transmitted to all the other nozzles through the common ink chamber, making jetting unstable, especially at repetitive jetting frequencies. When I raised it higher, the drawback was that the xD nozzles would interfere with each other and suck air from the xD nozzles, making it impossible to eject ink.
本発明は以上の欠点を除去したもので、その目的は、マ
ルチノズルヘッドにおいて安定噴射を行うことｔ／ｃろ
る。The present invention eliminates the above drawbacks, and its purpose is to provide stable jetting in a multi-nozzle head.
本発明の他の目的は、繰返し噴射周波数金高くすること
にある。Another object of the present invention is to increase the repetitive injection frequency.
本発明は、共通インク室金通じての圧カバルスの相互の
干渉を除去し、それぞれのノズルが独自の圧力パルスの
みで作動できるように、共通インク室に圧力パルスを吸
収できるよう空気室を備えている。The present invention eliminates mutual interference of the pressure cavities through the common ink chamber metal, and provides an air chamber in the common ink chamber to absorb pressure pulses so that each nozzle can operate only with its own pressure pulse. ing.
不発明について、実施例について述べる。Examples of non-invention will be described.
第１図は本発明による一実施例のインクジェットヘッド
の平面図で、第２図は第１図の断面図でめる。基板１に
は、インク流路となる溝が両面あるいは片面に形成され
ている。ガラスにフォトエツチング加工して溝を形成し
て基板１とする方法、セラミックに面押じ等にニジ溝全
形成する方法、又、グラスチック射出形成法によシ溝を
形成する方法等いろいろ考えられる。マフラ９も基板１
と同じ材質、製造方法で基板１と同時に又は別々に作ら
れる。マフラ９には空気室７となるべき凹部がめる。基
板１及び１くら９を振動板２で両側からはさみ、熱融°
着（ガラス、セラミックや接着（プラスチック）で一体
とする。基板１及び１くら９と振動板２との間には、供
給部２０．圧力室５、ノズル４．共通インク寛６．空気
室７．微小開口部８が形成される。各々の圧力室に対応
して振動板２上に圧電素子３が接漸嘔れる。父、共通イ
ンク室６の一万にはフタ１１が接着され、他方にはパイ
ツーが接着されている。FIG. 1 is a plan view of an inkjet head according to an embodiment of the present invention, and FIG. 2 is a sectional view of FIG. 1. In the substrate 1, grooves serving as ink flow paths are formed on both sides or one side. Various methods have been considered, including a method of photoetching glass to form grooves to form the substrate 1, a method of forming all rainbow grooves on ceramic by surface pressing, etc., and a method of forming grooves using a glass injection molding method. It will be done. Muffler 9 and board 1
It is manufactured using the same material and manufacturing method as the substrate 1 at the same time or separately. The muffler 9 is fitted with a recess that will become the air chamber 7. Sandwich the substrates 1 and 9 with the diaphragm 2 from both sides and heat-fuse them.
They are integrated with adhesive (glass, ceramic, or adhesive (plastic). Between the substrates 1 and 1 9 and the diaphragm 2, there are a supply section 20, a pressure chamber 5, a nozzle 4, a common ink chamber 6, and an air chamber 7. A minute opening 8 is formed.A piezoelectric element 3 is placed on the diaphragm 2 corresponding to each pressure chamber.A lid 11 is glued to one end of the common ink chamber 6; A pie two is glued to it.
微小開口部８の形状はノズル４とほぼ向８度で長さ１０
０μｍ、深さ４０μｍ９幅１００μｍである。又圧力室
５や空気室７の深さは１００μｍある。The shape of the micro opening 8 is approximately 8 degrees in the direction of the nozzle 4, and the length is 10.
0 μm, depth 40 μm, width 100 μm. Further, the depth of the pressure chamber 5 and the air chamber 7 is 100 μm.
インクはインクタンクニジバイブ１０を通り、共通イン
ク室６．微小開口部８．圧力室５及びノズル４を満たし
ている。空気室７同は微小開口部８からインクが入って
くるため、空気の出口がなく空気が満たされている。共
通インク室６エシノズル側の流路中にはほとんど気泡は
ない。この時、圧延素子３に電界をかけると、振動板２
が圧力室５側にたわみ、圧力室５中のインク圧が高１シ
、ノズル４側及び共通インク室６側へ圧力パルスが伝わ
る。ノズル４からはインク滴が噴射する。−万、共通イ
ンク室６への圧カバルスは、共通インク室内の圧力を高
め、圧カバルスを発生させていない圧力室５Ｖｃ伝わり
、ノズル４でのメぬスカスを不安定にしＬうとするが、
空気室７中の空気は少しの圧力変動でも体積変化が大き
く、従って、共通インク室内の圧力は吸収され、他のノ
ズル４へは圧力パルスは伝わらない。すなわち、各々の
圧力室の変動が干渉しあわない。The ink passes through the ink tank Nijivibe 10 and is transferred to the common ink chamber 6. Micro opening 8. It fills the pressure chamber 5 and nozzle 4. Since ink enters the air chamber 7 through the minute opening 8, there is no air outlet and the air chamber 7 is filled with air. There are almost no air bubbles in the flow path on the nozzle side of the common ink chamber 6. At this time, when an electric field is applied to the rolling element 3, the vibration plate 2
is bent toward the pressure chamber 5 side, the ink pressure in the pressure chamber 5 becomes high, and a pressure pulse is transmitted to the nozzle 4 side and the common ink chamber 6 side. Ink droplets are ejected from the nozzle 4. - The pressure caballus to the common ink chamber 6 increases the pressure in the common ink chamber and is transmitted to the pressure chamber 5Vc which does not generate the pressure caballus, which attempts to destabilize the menuscus in the nozzle 4.
The air in the air chamber 7 undergoes a large change in volume even with a slight pressure change, so the pressure in the common ink chamber is absorbed and no pressure pulse is transmitted to other nozzles 4. That is, fluctuations in each pressure chamber do not interfere with each other.
共通インク室６内の圧力は、大気圧であるノズル面に対
して０〜−１０ｍＨｚＯという微負圧となっていて、ノ
ズル部の表面張力に工りメニスカスを形成しているため
、共通インク室６内の圧力変動が数ｍ以下でないと、モ
ノノズル時に比べて不安定となる。空気室７は、共通イ
ンク室６内全体に分散していないと遠くの圧力パルスは
、吸収される前に他のノズル４に干渉する。従って、圧
力空気室７は全体に分散している。The pressure inside the common ink chamber 6 is a slight negative pressure of 0 to -10 mHzO with respect to the nozzle surface, which is atmospheric pressure, and a meniscus is formed due to the surface tension of the nozzle. Unless the pressure fluctuation within the nozzle is several meters or less, the nozzle becomes unstable compared to when using a mono nozzle. The air chambers 7 are not distributed throughout the common ink chamber 6 and distant pressure pulses will interfere with other nozzles 4 before being absorbed. The pressure air chambers 7 are therefore distributed throughout.
インク噴射中に振動等で空気室７中の空気が、ノズル側
へ流れていくと、噴射不能になるので、微小開口部８で
表面張力が働いて空気が出ないように形状金側くしであ
る。If the air in the air chamber 7 flows toward the nozzle side due to vibrations or the like during ink ejection, ejection becomes impossible, so a metal-shaped comb is used to prevent air from coming out due to surface tension in the minute openings 8. be.
他の実施例として第３図を説明する。FIG. 3 will be described as another embodiment.
第３図で記号はすべて第１図、第２図と同じである。共
通インク室６は全ノズル４ヘインクを供給する必要があ
るため、ある程度の大きさく例えば １．６〜１．６
ｍｍ等）を必要とする。供給部２０同志の距離が空気室
７１での距離、１近い場合は多少干渉しあうことになる
が、第５図のように供給部２０と供給部２０との間に空
気室７及び微小開口’！［５８ｔ−備えると、非常に効
果的に圧力全吸収できる。All symbols in FIG. 3 are the same as in FIGS. 1 and 2. Since the common ink chamber 6 needs to supply ink to all the nozzles 4, it should have a certain size, for example, 1.6 to 1.6.
mm etc.). If the distance between the supply parts 20 is close to the distance in the air chamber 71 by 1, there will be some interference with each other, but as shown in FIG. '! [58t- can absorb the total pressure very effectively.
以上説明した１５に、本発明によれば、各圧力室は相互
干渉を受けることなく各ノズルエリイ／りを噴射し、モ
ノノズルの時と同様の性能を°発揮する。従来のヘッド
では、ひとつのノズルだけ噴射する時には７ ＫＨｚの
応答周波数だったのが、マルチ噴射すると２．５ＫＨｚ
’（越えるとノズルより空気を吸い込んで噴射不能とな
った。ところが本発明のインクジェットヘッドでは、マ
ルチ噴射しても７ ＫＨｚの応答周波数を維持でき、安
定噴射が可能となった。As explained above, according to the present invention, each pressure chamber injects each nozzle area without mutual interference, and exhibits the same performance as a mono nozzle. With conventional heads, the response frequency was 7 KHz when only one nozzle was injecting, but when multi-injecting, the response frequency was 2.5 KHz.
(If the inkjet head exceeds this, air will be sucked in from the nozzle and jetting will become impossible.However, the inkjet head of the present invention can maintain a response frequency of 7 KHz even when performing multiple jetting, making stable jetting possible.
マルチノズル化するのは、単位時間内のインク滴全多く
することが第一目的であるから、応答周波数がモノノズ
ルと同じということはマルチ化した倍数だけインク滴を
多く噴射でき、記録時間の短縮がはかれるという利点が
ある。The primary purpose of using multiple nozzles is to increase the total number of ink droplets in a unit time, so the fact that the response frequency is the same as a mono nozzle means that more ink droplets can be ejected by the multiple of the multi-nozzle, reducing recording time. It has the advantage of being measurable.
父、共通インク室に空気を備えたことにより、インクタ
ンク側からの圧力変動も吸収でき、安定噴射に役立って
いる。インクジェットヘッドをプリンタなどに応用する
場合、ヘッドとタンクとの間にプラスチックチューブ等
で連結し、動かすと圧力変動はかなりあシ、そのために
噴射が不安定になるという欠点も克服できる利点もある
。By providing air in the common ink chamber, pressure fluctuations from the ink tank can be absorbed, which helps ensure stable jetting. When applying an inkjet head to a printer, etc., the head and tank are connected with a plastic tube, etc., and pressure fluctuations are considerably reduced when the head is moved, which has the advantage of overcoming the disadvantage of unstable jetting.
嘔らに、圧力変動を少くする几めに従来は共通インク寅
の容積を大きくする必要がめったが、本発明によれば、
ずっと小さくでき、形状の小形化及びヘッド自身の強度
も上がるという利点もめる。Moreover, in the past, it was rarely necessary to increase the volume of the common ink tank in order to reduce pressure fluctuations, but according to the present invention,
It also has the advantage of being much smaller, making the shape more compact, and increasing the strength of the head itself.
第１図は本発明のインクジェットヘッドの平面図、第２
図は第１図の断面図である。第３図は本発明の他の英施
例を示す図である。
４・・・・・・ノズル
５・・・・・・圧力室
６・・・・・・共通インク室
７・・・・・・圧力室
以 上
第１図
第２図
第３図FIG. 1 is a plan view of the inkjet head of the present invention, and FIG.
The figure is a sectional view of FIG. 1. FIG. 3 is a diagram showing another embodiment of the present invention. 4...Nozzle 5...Pressure chamber 6...Common ink chamber 7...Pressure chamber and above Figure 1 Figure 2 Figure 3
Claims (1)
から複数個繋がっているドロップオンディマントタイプ
のマルチノズルインクジェットヘッドにおいて、前記共
通インク室に繋がった全気室ヲ備えていること全特徴と
するインクジェットヘッド。In a drop-on demand type multi-nozzle inkjet head in which a plurality of flow paths of a supply section, pressure chambers, and nozzles are connected from a common ink chamber, all air chambers connected to the common ink chamber are provided. Features an inkjet head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20953482A JPS5998859A (en) | 1982-11-30 | 1982-11-30 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20953482A JPS5998859A (en) | 1982-11-30 | 1982-11-30 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5998859A true JPS5998859A (en) | 1984-06-07 |
Family
ID=16574385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20953482A Pending JPS5998859A (en) | 1982-11-30 | 1982-11-30 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5998859A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01285356A (en) * | 1988-05-12 | 1989-11-16 | Canon Inc | Ink jet recording head |
| EP0759361A2 (en) * | 1995-08-23 | 1997-02-26 | Seiko Epson Corporation | Laminated ink jet recording head |
| US5682190A (en) * | 1992-10-20 | 1997-10-28 | Canon Kabushiki Kaisha | Ink jet head and apparatus having an air chamber for improving performance |
| EP1078760A2 (en) * | 1999-08-24 | 2001-02-28 | Canon Kabushiki Kaisha | Print head and ink jet printing apparatus |
| US6260962B1 (en) | 1991-01-19 | 2001-07-17 | Canon Kabushiki Kaisha | Liquid jetting device having a mechanism for introducing a bubble into a liquid chamber and recording apparatus using the device |
| EP1116591A1 (en) * | 2000-01-17 | 2001-07-18 | Seiko Epson Corporation | Ink-jet recording head, manufacturing method of the same and ink-jet recording apparatus |
| JP2006315360A (en) * | 2005-05-16 | 2006-11-24 | Brother Ind Ltd | Inkjet head |
| WO2014168770A1 (en) * | 2013-04-11 | 2014-10-16 | Eastman Kodak Company | Printhead including acoustic dampening structure |
| US9162454B2 (en) | 2013-04-11 | 2015-10-20 | Eastman Kodak Company | Printhead including acoustic dampening structure |
| US9199462B1 (en) | 2014-09-19 | 2015-12-01 | Eastman Kodak Company | Printhead with print artifact supressing cavity |
-
1982
- 1982-11-30 JP JP20953482A patent/JPS5998859A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01285356A (en) * | 1988-05-12 | 1989-11-16 | Canon Inc | Ink jet recording head |
| US6260962B1 (en) | 1991-01-19 | 2001-07-17 | Canon Kabushiki Kaisha | Liquid jetting device having a mechanism for introducing a bubble into a liquid chamber and recording apparatus using the device |
| US5682190A (en) * | 1992-10-20 | 1997-10-28 | Canon Kabushiki Kaisha | Ink jet head and apparatus having an air chamber for improving performance |
| EP0594110B1 (en) * | 1992-10-20 | 2000-02-02 | Canon Kabushiki Kaisha | Ink jet head, method of producing the ink jet head and ink jet apparatus operable using the ink jet head |
| US5963234A (en) * | 1995-08-23 | 1999-10-05 | Seiko Epson Corporation | Laminated ink jet recording head having flow path unit with recess that confronts but does not communicate with common ink chamber |
| EP0759361A3 (en) * | 1995-08-23 | 1998-03-18 | Seiko Epson Corporation | Laminated ink jet recording head |
| EP0759361A2 (en) * | 1995-08-23 | 1997-02-26 | Seiko Epson Corporation | Laminated ink jet recording head |
| EP1078760A2 (en) * | 1999-08-24 | 2001-02-28 | Canon Kabushiki Kaisha | Print head and ink jet printing apparatus |
| EP1078760A3 (en) * | 1999-08-24 | 2001-05-16 | Canon Kabushiki Kaisha | Print head and ink jet printing apparatus |
| EP1116591A1 (en) * | 2000-01-17 | 2001-07-18 | Seiko Epson Corporation | Ink-jet recording head, manufacturing method of the same and ink-jet recording apparatus |
| US7135121B2 (en) | 2000-01-17 | 2006-11-14 | Seiko Epson Corporation | Ink-jet recording head, manufacturing method of the same and ink-jet recording apparatus |
| JP2006315360A (en) * | 2005-05-16 | 2006-11-24 | Brother Ind Ltd | Inkjet head |
| JP4655753B2 (en) * | 2005-05-16 | 2011-03-23 | ブラザー工業株式会社 | Inkjet head |
| WO2014168770A1 (en) * | 2013-04-11 | 2014-10-16 | Eastman Kodak Company | Printhead including acoustic dampening structure |
| US9162454B2 (en) | 2013-04-11 | 2015-10-20 | Eastman Kodak Company | Printhead including acoustic dampening structure |
| US9168740B2 (en) | 2013-04-11 | 2015-10-27 | Eastman Kodak Company | Printhead including acoustic dampening structure |
| US9199462B1 (en) | 2014-09-19 | 2015-12-01 | Eastman Kodak Company | Printhead with print artifact supressing cavity |
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