JPS6232111B2 - - Google Patents
Info
- Publication number
- JPS6232111B2 JPS6232111B2 JP53140725A JP14072578A JPS6232111B2 JP S6232111 B2 JPS6232111 B2 JP S6232111B2 JP 53140725 A JP53140725 A JP 53140725A JP 14072578 A JP14072578 A JP 14072578A JP S6232111 B2 JPS6232111 B2 JP S6232111B2
- Authority
- JP
- Japan
- Prior art keywords
- flow path
- ink
- nozzle
- valve
- sectional area
- 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
Links
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000758 substrate 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
- B41J2/015—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
Landscapes
- 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〕
本発明はインクを入力信号に応じて噴射し記録
を行なうインクジエツトプリンターのインク噴射
ヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ink jet head for an ink jet printer that performs recording by jetting ink in response to an input signal.
種々のインクジエツト記録装置の中でインクを
噴射するヘツドに電気−機械変換素子を配し、該
素子に印字信号パルスを与えることにより生ずる
素子の変形を利用してインクを噴射する所謂オン
デマンド型インクジエツト記録装置がその装置の
簡略性等から注目されている。
Among various inkjet recording devices, an electro-mechanical conversion element is arranged in the head that ejects ink, and the so-called on-demand inkjet ejects ink by utilizing the deformation of the element caused by applying a print signal pulse to the element. Recording devices are attracting attention because of their simplicity.
この種のヘツドの基本原理を第１図に示す。 The basic principle of this type of head is shown in FIG.
記録用インク１が貯蔵タンク２を満たしてお
り、かつ接続管３を通じて圧力室５を満たしさら
に圧力室５より噴射流路６からノズル７まで記録
用インク１が導びかれている。今インク１の噴射
が必要になると、インク室５の一壁を構成してい
る電気機械変換素子４（例えばピエゾ素子）に電
気信号を与えると、この変換素子４が撓み、圧力
室５の圧力を変化させ、この圧力変化がノズル７
の先端に伝わり、大気圧より適当な高い圧力が発
生するとノズル７より液体が噴射する。従つて噴
射が必要なときのみ変換素子４に電気信号を与え
ることによりインクを噴射することができ、これ
を記録紙に投射記録することができる。かかるイ
ンクジエツト記録装置の特性をよく観察してみる
と、圧力室５とノズル７の間の噴射流路６の長さ
によつて印加電気信号に対する噴射の時間的遅れ
が変化することが分る。即ち、噴射流路６が短か
ければ短い程、上述の遅れ時間が短く、長ければ
長い程この遅れ時間が長くなる。 Recording ink 1 fills a storage tank 2, fills a pressure chamber 5 through a connecting pipe 3, and is further guided from the pressure chamber 5 from an ejection channel 6 to a nozzle 7. When it is necessary to eject the ink 1, when an electric signal is applied to the electromechanical transducer 4 (for example, a piezo element) constituting one wall of the ink chamber 5, this transducer 4 bends, causing the pressure in the pressure chamber 5 to This pressure change causes nozzle 7
When a pressure appropriately higher than atmospheric pressure is generated, liquid is ejected from the nozzle 7. Therefore, ink can be ejected by applying an electric signal to the conversion element 4 only when ejection is necessary, and the ink can be projected and recorded on recording paper. A careful observation of the characteristics of such an inkjet recording apparatus reveals that the time delay of ejection relative to the applied electrical signal changes depending on the length of the ejection flow path 6 between the pressure chamber 5 and the nozzle 7. That is, the shorter the injection flow path 6 is, the shorter the above-mentioned delay time is, and the longer it is, the longer this delay time is.
また流路６の断面積についても断面積が小さく
なる程遅れ時間は長くなる。これらは即ち、流路
６のインクに及ぼす流路抵抗が変化するに他なら
ないからである。 Also, regarding the cross-sectional area of the flow path 6, the smaller the cross-sectional area, the longer the delay time becomes. This is because the flow path resistance exerted on the ink in the flow path 6 changes.
さて、上記の原理を用い一枚の基板に複数の圧
力室、ノズルを集積してマルチタイプの噴射ヘツ
ドを構成する提案が従来よりなされている。この
一例を第２図に示す。 Now, there have been proposals in the past to construct a multi-type injection head by integrating a plurality of pressure chambers and nozzles on a single substrate using the above-mentioned principle. An example of this is shown in FIG.
この第２図は圧力室、ノズルなどをエツチング
により形成した例を模型的に示したものであり、
９は各圧力室１０〜１６へインクを供給するため
のインクだまりで流入路８よりインク貯蔵タンク
（図示せず）からのインクの供給を受ける。各圧
力室１０〜１６は夫々の噴射流路１７〜２３を経
て各ノズル２４〜３０につながつている。 This figure 2 schematically shows an example in which pressure chambers, nozzles, etc. are formed by etching.
Reference numeral 9 denotes an ink reservoir for supplying ink to each of the pressure chambers 10 to 16, and receives ink from an ink storage tank (not shown) through an inflow path 8. Each pressure chamber 10-16 is connected to each nozzle 24-30 via a respective injection flow path 17-23.
このようなマルチタイプのヘツドを構成する上
での問題点はノズル部は印字する文字の高さ（通
常0.1インチ）の範囲に全てのノズルを集中させ
る必要があり、また圧力室はある程度の大きさを
必要とするので、圧力室からノズルに至る流路形
状を等しくすることが困難であつて前述の説明か
らも明らかなように、流路抵抗が夫々異なるた
め、各ノズルから噴出するインクの位相がそろわ
ず正常な印字ができなかつた。このため駆動回路
の位相調整を行なう必要があり、制御が複雑にな
つていた。
The problem with configuring such a multi-type head is that all the nozzles must be concentrated within the height range of the characters to be printed (usually 0.1 inch), and the pressure chamber must be of a certain size. Therefore, it is difficult to make the shape of the flow path from the pressure chamber to the nozzle equal.As is clear from the above explanation, the flow path resistance is different for each nozzle. The phases were not aligned and normal printing was not possible. For this reason, it is necessary to adjust the phase of the drive circuit, making control complicated.
本発明は上記欠点を除去した多ノズルのインク
ジエツト記録装置の噴射ヘツドを提供することを
目的とする。 An object of the present invention is to provide an ejection head for a multi-nozzle inkjet recording device that eliminates the above-mentioned drawbacks.
本発明の噴射ヘツドは、同一ヘツド内に複数の
ノズルと、該ノズルの各々に対応してインク噴射
させる圧力を発生する圧力室を備え、前記ノズル
と前記圧力室を連通する各流路の形状のうち少な
くとも１つが異なるインクジエツト記録装置の噴
射ヘツドにおいて、前記流路の少なくとも１つに
外部より回転操作可能で回転角により前記流路の
前記インクの流動断面積が変化する弁を配置し、
前記弁の回転操作により前記断面積を変え前記複
数の流路抵抗を略同一としたものである。
The ejection head of the present invention includes a plurality of nozzles in the same head and pressure chambers that generate pressure for ejecting ink corresponding to each of the nozzles, and the shape of each flow path communicating between the nozzles and the pressure chambers. In an ejection head of an inkjet recording device in which at least one of the ink jets is different, a valve is disposed in at least one of the flow paths and is rotatably operable from the outside and whose flow cross-sectional area of the ink in the flow path changes depending on the rotation angle,
The cross-sectional area is changed by rotating the valve to make the plurality of flow path resistances substantially the same.
本発明においては、外部より弁を操作してイン
クの流動断面積を変化させ、複数の流路抵抗を略
同一にする。
In the present invention, a valve is operated from the outside to change the flow cross-sectional area of the ink, thereby making the plurality of flow path resistances substantially the same.
以下、第３図の本発明の一実施例につき詳細に
説明する。
Hereinafter, one embodiment of the present invention shown in FIG. 3 will be described in detail.
第３図に示すのは、同一ヘツド内に設けられた
少なくとも１つの流路３３の途中に、図に示すよ
うに外部より回転操作可能で回転角により流路３
３の断面積が変化する弁３５を配置したものであ
る。外部からの操作で弁が回転すると、弁３５の
部分における流路３３のインク流動断面積が変化
する。 What is shown in FIG. 3 is that at least one channel 33 provided in the same head is provided in the middle of the flow channel 33, which can be rotated from the outside as shown in the figure.
3, a valve 35 whose cross-sectional area changes is arranged. When the valve is rotated by an external operation, the ink flow cross-sectional area of the flow path 33 at the valve 35 portion changes.
つまり、板状の弁が圧力室３１からノズル３２
へのインク流動方向と平行になるように回転さ
れ、弁３５部における流路のインク流動断面積が
大きくなると流路抵抗は小さくなる。逆に板状の
弁が圧力室３１からノズル３２へのインク流動方
向と直角に近くなるように回転される程、弁３５
部における流路のインク流動断面積は小さくな
り、流路抵抗は大きくなる。このようにして流路
内の弁部におけるインクの流動断面積をかえ、同
一ヘツド内に設けられた複数の流路抵抗を略同一
にする。 In other words, the plate-shaped valve connects the pressure chamber 31 to the nozzle 32.
When the ink flow cross-sectional area of the flow path at the valve 35 section increases, the flow path resistance becomes smaller. Conversely, the more the plate-shaped valve is rotated so that it is perpendicular to the direction of ink flow from the pressure chamber 31 to the nozzle 32, the more the valve 35
The ink flow cross-sectional area of the flow path in the area becomes smaller, and the flow path resistance becomes larger. In this way, the flow cross-sectional area of the ink in the valve portion in the flow path is changed, and the resistances of the plurality of flow paths provided in the same head are made approximately the same.
又、流路３３の断面積が一定でなく、例えば第
３図に示すようにノズル３２の近傍に近づく程、
細くなつているような場合には、弁３５の設置す
る位置（つまり、ノズルに近づけるか、あるいは
遠ざけるかする。）を調整することによつても流
路抵抗を調整でき、弁の回転と組み合わせれば、
よりきめ細かな制御が実現できる。 Furthermore, the cross-sectional area of the flow path 33 is not constant; for example, as shown in FIG.
If the flow path is narrow, the flow path resistance can also be adjusted by adjusting the installation position of the valve 35 (that is, moving it closer to or away from the nozzle), and in combination with the rotation of the valve. If so,
More fine-grained control can be achieved.
又、弁３５の大きさ、又は、形状を調整するこ
とによつても、流路抵抗を調整できる。 Further, the flow path resistance can also be adjusted by adjusting the size or shape of the valve 35.
以上説明した如く本発明は単純な構成で噴出イ
ンクの位相調整ができ、ノズル製作上のバラツキ
も簡単に補正できマルチタイプの噴射ヘツドを構
成する上で特に利点が大きい。
As explained above, the present invention allows phase adjustment of ejected ink with a simple configuration, and easily corrects variations in nozzle manufacturing, which is particularly advantageous when constructing a multi-type ejection head.
又、弁の回転動作により、流路断面積が大幅に
変化するので、流路抵抗の調整の範囲が大きく、
ノズルの製作上のバラツキに対する適用範囲が非
常に広い。従つて、ノズル製作上のバラツキによ
り、複数の流路抵抗が大きく異なる場合でも本発
明によれば、各流路抵抗を略同一にできる。 In addition, the flow path cross-sectional area changes significantly due to the rotational movement of the valve, so the range of flow path resistance adjustment is wide.
It has a very wide range of application to variations in nozzle manufacturing. Therefore, even if a plurality of flow path resistances differ greatly due to variations in nozzle manufacturing, according to the present invention, each flow path resistance can be made substantially the same.
又、弁の操作により簡単に微調整が可能なの
で、各ノズルごとのインク噴出をきめ細かく調整
でき高品質の印字を実現できる。 Furthermore, since fine adjustments can be easily made by operating the valve, the ink ejection from each nozzle can be finely adjusted and high-quality printing can be achieved.
第１図はオンデマンド型インクジエツト記録装
置の噴射ヘツドの原理を示す図。第２図は従来提
案されているマルチタイプ噴射ヘツドの一例を示
す図。第３図は、本発明の一実施例を示す図。
１…インク、２…貯蔵タンク、３…接続管、４
…電気−機械変換素子、５…圧力室、６…流路、
７…ノズル、８…流入路、９…インクだまり、１
０〜１６…圧力室、１７〜２３…流路、２４〜３
０…ノズル、３１…圧力室、３２…ノズル、３３
…流路、３５…弁。
FIG. 1 is a diagram showing the principle of an ejection head of an on-demand type inkjet recording device. FIG. 2 is a diagram showing an example of a conventionally proposed multi-type injection head. FIG. 3 is a diagram showing an embodiment of the present invention. 1... Ink, 2... Storage tank, 3... Connection pipe, 4
...Electro-mechanical conversion element, 5...Pressure chamber, 6...Flow path,
7... Nozzle, 8... Inflow path, 9... Ink pool, 1
0-16...Pressure chamber, 17-23...Flow path, 24-3
0... Nozzle, 31... Pressure chamber, 32... Nozzle, 33
...Flow path, 35...Valve.
Claims (1)
各々に対応してインクを噴射させる圧力を発生す
る圧力室を備え、前記ノズルと前記圧力室を連通
する各流路の形状のうち少なくとも１つが異なる
インクジエツト記録装置の噴射ヘツドにおいて、
前記流路の少なくとも１つに外部より回転操作可
能で回転角により前記流路の前記インクの流動断
面積が変化する弁を配置し、前記弁の回転操作に
より前記断面積を変え前記複数の流路抵抗を略同
一としたことを特徴とするインクジエツト記録装
置の噴射ヘツド。1 A plurality of nozzles and a pressure chamber that generates a pressure for ejecting ink corresponding to each nozzle are provided in the same head, and at least one of the shapes of each flow path communicating between the nozzle and the pressure chamber is In the ejection head of different inkjet recording devices,
A valve that can be rotated from the outside and that changes the flow cross-sectional area of the ink in the flow path depending on the rotation angle is disposed in at least one of the flow paths, and the cross-sectional area of the ink in the flow path is changed by the rotational operation of the valve. An ejection head for an inkjet recording device, characterized in that the road resistance is approximately the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14072578A JPS5567479A (en) | 1978-11-14 | 1978-11-14 | Jet head of ink jet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14072578A JPS5567479A (en) | 1978-11-14 | 1978-11-14 | Jet head of ink jet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5567479A JPS5567479A (en) | 1980-05-21 |
| JPS6232111B2 true JPS6232111B2 (en) | 1987-07-13 |
Family
ID=15275248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14072578A Granted JPS5567479A (en) | 1978-11-14 | 1978-11-14 | Jet head of ink jet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5567479A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576777A (en) * | 1980-06-16 | 1982-01-13 | Nec Corp | Ink jet recording device |
| US4928125A (en) * | 1987-09-24 | 1990-05-22 | Minolta Camera Kabushiki Kaisha | Liquid drop ejection apparatus using a magnetic fluid |
| JP4852965B2 (en) * | 2004-12-03 | 2012-01-11 | コニカミノルタホールディングス株式会社 | Inkjet head |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142430A (en) * | 1976-05-22 | 1977-11-28 | Minolta Camera Co Ltd | Ink jet recording control device |
| JPS53108433A (en) * | 1977-03-04 | 1978-09-21 | Oki Electric Ind Co Ltd | Liquid droplet injecting device |
-
1978
- 1978-11-14 JP JP14072578A patent/JPS5567479A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52142430A (en) * | 1976-05-22 | 1977-11-28 | Minolta Camera Co Ltd | Ink jet recording control device |
| JPS53108433A (en) * | 1977-03-04 | 1978-09-21 | Oki Electric Ind Co Ltd | Liquid droplet injecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5567479A (en) | 1980-05-21 |
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