JPH0114030B2 - - Google Patents
Info
- Publication number
- JPH0114030B2 JPH0114030B2 JP56039212A JP3921281A JPH0114030B2 JP H0114030 B2 JPH0114030 B2 JP H0114030B2 JP 56039212 A JP56039212 A JP 56039212A JP 3921281 A JP3921281 A JP 3921281A JP H0114030 B2 JPH0114030 B2 JP H0114030B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- ink
- deflection
- plate part
- ink chamber
- 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
- 239000000758 substrate Substances 0.000 description 12
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000007788 liquid 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
- B41J2/14201—Structure of print heads with piezoelectric elements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】
この発明はヘツドにおけるノズルの方向を偏向
するオンデマンド型インクジエツト・プリンター
に関するものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to an on-demand inkjet printer that deflects the direction of nozzles in a head.
従来、オンデマンド型インクジエツト・プリン
ターにおけるヘツドのノズルは固定されたもので
あつたため、必要とするドツトに対応する数のノ
ズルを設ける必要があつた。又、このプリンター
は、インク滴に記録信号に対応した荷電量を与え
て、飛行中のインク滴を偏向させる荷電制御方式
のインクジエツト・プリンターに比べて構成が簡
単である等の長所を有するものであるが、インク
滴の偏向が不可能である為に、印字品質が荷電制
御方式に比べて劣り、印字速度が遅い等の欠点を
有していた。 Conventionally, the head nozzles in on-demand inkjet printers have been fixed, so it has been necessary to provide a number of nozzles corresponding to the number of dots required. Additionally, this printer has advantages such as a simpler configuration than inkjet printers that use a charge control system that deflects ink droplets in flight by imparting a charge amount to the ink droplets that corresponds to the recording signal. However, since the ink droplets cannot be deflected, the printing quality is inferior to the charge control method, and the printing speed is slow.
オンデマンド型インクジエツト方式のプリンタ
ーのヘツドは板状の基板を２枚接合してインクジ
エツトのヘツドを形成すると共に、２枚の基板の
接合部に種々の深さ及び形状を有する溝を形成
し、それぞれインクタンク及び圧力発生用のイン
ク室、ノズル部等を構成し、インクを外部からイ
ンクタンクに導入してインク室及びノズル部に充
填し、インク室及びノズル部に気泡が混入してい
ない状態に保たせ、一方、インク室に添つて前記
基板の外側壁面に密着させてバイモルフ振動子を
設け、電気信号印加時のインク室の容積変化によ
つてノズルからインク滴を噴射させるように設定
されているものである。以上の構成は本発明にお
いても同一である。本発明の特徴とする構成要素
を以下に述べる。本発明の特徴とするところは、
ノズル部分の基板の厚さを可能な限り薄くすると
共に、ヘツドを形成する基板に弾性度の高い材料
（例えばステンレス材質）を用いることによつて
ノズルを形成させた基板部分を基板の板厚方向に
容易に変形可能とし変形の繰り返えしによる機械
的走査に対して充分な耐久性を具備させたものと
してノズル部分を構成し、さらにノズルに添つ
て、基板の外側面に密着させてバイモルフ振動子
を設け、駆動信号に基ずいてノズルの方向を偏向
する如く構成した点にある。 The head of an on-demand inkjet printer has two plate-shaped substrates joined together to form the inkjet head, and grooves with various depths and shapes are formed at the joint of the two substrates. It consists of an ink tank, an ink chamber for pressure generation, a nozzle section, etc., and ink is introduced into the ink tank from the outside, filling the ink chamber and nozzle section, and ensuring that no air bubbles are mixed in the ink chamber and nozzle section. On the other hand, a bimorph vibrator is provided along the ink chamber in close contact with the outer wall surface of the substrate, and is set to eject ink droplets from the nozzle by a change in the volume of the ink chamber when an electric signal is applied. It is something that exists. The above configuration is the same in the present invention. The constituent elements that characterize the present invention will be described below. The features of the present invention are as follows:
By making the thickness of the substrate in the nozzle part as thin as possible and by using a material with high elasticity (for example, stainless steel material) for the substrate forming the head, the part on which the nozzle is formed is made in the thickness direction of the substrate. The nozzle part is configured so that it can be easily deformed and has sufficient durability against mechanical scanning due to repeated deformation, and the bimorph part is formed by attaching it closely to the outer surface of the substrate along the nozzle. The point is that a vibrator is provided and the nozzle direction is deflected based on a drive signal.
本発明によれば、オンデマンド型インクジエツ
トヘツドの長所（必要な時だけインクを噴射する
点や高電圧不要等）を生かしつつ簡単な手段によ
つて偏向手段を具備したインクジエツト・プリン
ターを提供することができる。 According to the present invention, an inkjet printer is provided which utilizes the advantages of an on-demand type inkjet head (ink is ejected only when necessary, high voltage is not required, etc.) and is equipped with a deflection means by a simple means. be able to.
次に本発明の一実施例を図面を用いて詳述す
る。第１図に本発明のインクジエツト・ヘツドの
全体構成図を、第２図は偏向ノズル部分の（拡
大）断面図を示す。図中１はインクヘツドで、板
状のステンレス基板を２枚接合して形成してい
る。２はインクタンク、３はインク室、４はノズ
ルで、それぞれ前記２枚の基板の接合面に図示の
如き形状と各々適切な深さとから成る溝部分とし
て形成している。インクタンク２及びインク室
３、ノズル４はそれぞれ気密構造に形成され、漏
液及び気泡の混入が防止されている。５はインク
供給口で、外部のインクタンクからホースによつ
て導かれたインクはインク供給口５からインクタ
ンク２及びインク室３、ノズル４に充填される。
６はバイモルフ素子で、インク室３に添つてヘツ
ド１の外側壁面に密着して設けられ、駆動電圧の
印加に伴つてインク室３の容積を増減させること
により、ノズル４からインク滴７を噴出する如く
構成されている。８は偏向板部分で、ステンレス
基板の厚みを可能な限り薄く（実施例では0.2mm
厚）したものであつて、ノズル先端部が板厚方向
に±0.2mm程度の変位を繰り返えす偏向動作に対
して充分な弾力性と耐久性とを具備させたもので
ある。９はバイモルフ振動子で、ノズル４に添つ
て偏向板部分の外側面に密着させて設けたもので
あり、偏向駆動電圧の印加に伴つて偏向板部分を
変形させ、ノズル４の噴射方向を変化（偏向）さ
せるものである。 Next, one embodiment of the present invention will be described in detail using the drawings. FIG. 1 shows the overall configuration of the inkjet head of the present invention, and FIG. 2 shows an (enlarged) sectional view of the deflection nozzle portion. In the figure, 1 is an ink head, which is formed by bonding two plate-shaped stainless steel substrates. Reference numeral 2 denotes an ink tank, 3 an ink chamber, and 4 a nozzle, each of which is formed as a groove portion having a shape as shown in the figure and an appropriate depth on the joint surface of the two substrates. The ink tank 2, ink chamber 3, and nozzle 4 are each formed in an airtight structure to prevent liquid leakage and air bubbles from entering. Reference numeral 5 denotes an ink supply port, and ink introduced from an external ink tank by a hose is filled from the ink supply port 5 into the ink tank 2, ink chamber 3, and nozzle 4.
Reference numeral 6 denotes a bimorph element, which is provided in close contact with the outer wall surface of the head 1 along with the ink chamber 3, and ejects ink droplets 7 from the nozzle 4 by increasing or decreasing the volume of the ink chamber 3 with the application of a driving voltage. It is configured as follows. 8 is the deflection plate part, and the thickness of the stainless steel substrate is made as thin as possible (0.2 mm in the example).
The nozzle tip has sufficient elasticity and durability to withstand deflection operations in which the nozzle tip is repeatedly displaced by about ±0.2 mm in the plate thickness direction. Reference numeral 9 denotes a bimorph oscillator, which is provided along the nozzle 4 in close contact with the outer surface of the deflection plate portion, and deforms the deflection plate portion as a deflection drive voltage is applied to change the jetting direction of the nozzle 4. (deflection).
例えば、±0.2mm程度の偏向でもノズル先端と用
紙とのギヤツプを充分長くすることによつて、７
ポイントから９ポイント程度の大きさの文字を印
字することが可能である。 For example, even with a deflection of about ±0.2 mm, by making the gap between the nozzle tip and the paper sufficiently long, it is possible to
It is possible to print characters with sizes ranging from point to 9 points.
次いで、第２図において200はヘツドの基板部
分であり、充分な厚さ（実施例では２mm厚）を有
している。８は偏向板部分で板厚を極力薄く（実
施例は0.2mm厚）した部分である。９はバイモル
フ振動子で、電極２０１を介して印加された駆動
電圧によつて変形し、ノズル４の先端部を矢印２
０２又は矢印２０３方向に変位させることによ
り、ノズル４の噴射方向を偏向させるものであ
る。７は噴出されたインク滴である。 Next, in FIG. 2, 200 is the substrate portion of the head, which has a sufficient thickness (2 mm thickness in the example). Reference numeral 8 denotes a deflecting plate portion whose thickness is as thin as possible (0.2 mm thick in the example). Reference numeral 9 denotes a bimorph oscillator, which is deformed by the driving voltage applied through the electrode 201, and moves the tip of the nozzle 4 in the direction indicated by the arrow 2.
By displacing it in the direction of arrow 02 or arrow 203, the jetting direction of the nozzle 4 is deflected. 7 is an ejected ink droplet.
以上、第１図及び第２図にて示した構成のイン
クジエツトヘツドにおいて、駆動電圧がバイモル
フ振動子６に印加されてこれが振動すると、イン
ク室３の容積が増減してインク滴７がノズル４か
ら噴出する。この時、インク室３の容積が減少す
る際にインク滴が噴出し、インク室３の容積が増
大する際にインクタンク２からインク室３にイン
クが供給される。以上の如きインク噴出行程と同
時に他方でバイモルフ振動子９に偏向駆動電圧が
電極２０１を介して印加されると、バイモルフ振
動子９が変形し、バイモルフ振動子９と一体化さ
れた偏向板部分８も変形してノズル４の噴射方向
が矢印２０２又は矢印２０３方向に偏向する。従
つて偏向駆動電圧の波形を任意に設定することに
よつて、ノズル４の噴射方向を任意に制御するこ
とができるものである。 As described above, in the ink jet head having the configuration shown in FIGS. 1 and 2, when a driving voltage is applied to the bimorph vibrator 6 and it vibrates, the volume of the ink chamber 3 increases or decreases, and the ink droplet 7 is directed to the nozzle 4. erupts from. At this time, ink droplets are ejected when the volume of the ink chamber 3 decreases, and ink is supplied from the ink tank 2 to the ink chamber 3 when the volume of the ink chamber 3 increases. Simultaneously with the ink jetting process as described above, when a deflection drive voltage is applied to the bimorph vibrator 9 via the electrode 201, the bimorph vibrator 9 is deformed, and the deflection plate portion 8 integrated with the bimorph vibrator 9 is deformed. is also deformed, and the injection direction of the nozzle 4 is deflected in the direction of arrow 202 or arrow 203. Therefore, by arbitrarily setting the waveform of the deflection drive voltage, the ejection direction of the nozzle 4 can be arbitrarily controlled.
本発明によれば、簡単な構成の偏向手段によつ
て、走査機能を具備したオンデマンド型インクジ
エツト・プリンターを提供することができる。 According to the present invention, it is possible to provide an on-demand inkjet printer equipped with a scanning function using a simple deflection means.
なお、本実施例においては偏向板部分８を変形
させ、ノズル先端部を偏向させる手段としてバイ
モルフ振動子を用いたが、より強力な変位力を印
加するために電磁コイルにて駆動される振動体を
偏向板部分８に接続する手段を用いることも可能
であるが、容易に実施可能なのでここに詳述はし
ない。 In this example, a bimorph vibrator was used as a means for deforming the deflection plate portion 8 and deflecting the nozzle tip, but in order to apply a stronger displacement force, a vibrator driven by an electromagnetic coil was used. It is also possible to use means for connecting the deflection plate part 8 to the deflection plate part 8, but this is not discussed in detail here as it is easily implemented.
又、バイモルフ振動子を用いてノズル先端部を
偏向させる際に、前記偏向板部分８の機械的個有
振動数とバイモルフ振動子の振動周波数とを一致
させ、共鳴状態とすることによりより効率的で、
偏位量の大きい偏向を行うこともできる。 Furthermore, when deflecting the nozzle tip using a bimorph oscillator, it is more efficient by matching the unique mechanical frequency of the deflection plate portion 8 with the vibration frequency of the bimorph oscillator to create a resonant state. in,
It is also possible to perform deflection with a large amount of deflection.
第１図は本発明の一実施例を示すヘツドの全体
の断面図、第２図は偏向ノズル部分の拡大断面図
である。図中、１はヘツド、２はインクタンク、
３はインク室、４はノズル、５はインク供給口、
６及び９はバイモルフ振動子、７はインク滴、８
は偏向板部分、２００はヘツド基板、２０１は電
極、２０２及び２０３は矢印である。
FIG. 1 is a sectional view of the entire head showing one embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the deflection nozzle portion. In the figure, 1 is the head, 2 is the ink tank,
3 is an ink chamber, 4 is a nozzle, 5 is an ink supply port,
6 and 9 are bimorph oscillators, 7 is an ink droplet, 8
200 is a deflection plate portion, 200 is a head substrate, 201 is an electrode, and 202 and 203 are arrows.
Claims (1)
変化させることにより、インク室に連通したノズ
ルからインク滴を噴出する如く設定した走査型オ
ンデマンドインクジエツトプリンターにおいて、
前記ノズルを内蔵したヘツド先端部分の板厚を極
薄構造として、板厚方向への変形が容易な偏向板
部とし、前記偏向板部にバイモルフ振動子を設
け、偏向駆動電圧の印加により、偏向板部に首振
り的振動を発生させることによつて、ノズルのイ
ンク滴噴射方向を連続的に変化させて走査する如
くしたことを特徴とした走査型オンデマンド・イ
ンクジエツト・プリンター。1. In a scanning-type on-demand inkjet printer configured to eject ink droplets from a nozzle communicating with the ink chamber by changing the volume of the ink chamber using a bimorph vibrator,
The thickness of the tip of the head containing the nozzle is made extremely thin, and the deflection plate part is easily deformed in the thickness direction.A bimorph oscillator is provided in the deflection plate part, and by applying a deflection drive voltage, the deflection plate part can be easily deformed in the thickness direction. A scanning on-demand inkjet printer characterized in that the direction of ejecting ink droplets from a nozzle is continuously changed and scanned by generating an oscillating vibration in a plate part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3921281A JPS57152958A (en) | 1981-03-18 | 1981-03-18 | Scanning on-demand ink jet printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3921281A JPS57152958A (en) | 1981-03-18 | 1981-03-18 | Scanning on-demand ink jet printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57152958A JPS57152958A (en) | 1982-09-21 |
| JPH0114030B2 true JPH0114030B2 (en) | 1989-03-09 |
Family
ID=12546825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3921281A Granted JPS57152958A (en) | 1981-03-18 | 1981-03-18 | Scanning on-demand ink jet printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57152958A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575730A (en) * | 1984-11-14 | 1986-03-11 | Metromedia, Inc. | Ink jet printing randomizing droplet placement apparatus |
| KR0185329B1 (en) * | 1996-03-27 | 1999-05-15 | 이형도 | Recording method using motor inertia of recording liquid |
| JP2007055194A (en) | 2005-08-26 | 2007-03-08 | Fujifilm Corp | Liquid delivery head and image formation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840330A (en) * | 1971-09-23 | 1973-06-13 | ||
| JPS54134630A (en) * | 1978-04-11 | 1979-10-19 | Canon Inc | Recorder |
| JPS5517590A (en) * | 1978-07-27 | 1980-02-07 | Seiko Epson Corp | Ink jetting apparatus |
-
1981
- 1981-03-18 JP JP3921281A patent/JPS57152958A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4840330A (en) * | 1971-09-23 | 1973-06-13 | ||
| JPS54134630A (en) * | 1978-04-11 | 1979-10-19 | Canon Inc | Recorder |
| JPS5517590A (en) * | 1978-07-27 | 1980-02-07 | Seiko Epson Corp | Ink jetting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57152958A (en) | 1982-09-21 |
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