JPS58208063A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPS58208063A JPS58208063A JP8848682A JP8848682A JPS58208063A JP S58208063 A JPS58208063 A JP S58208063A JP 8848682 A JP8848682 A JP 8848682A JP 8848682 A JP8848682 A JP 8848682A JP S58208063 A JPS58208063 A JP S58208063A
- Authority
- JP
- Japan
- Prior art keywords
- vibrator
- oscillator
- output signal
- sensor
- 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
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、インクジェットヘッドに関するもので多って
、詳しくは、加圧インクが加えられるノズルの一部を振
動子で振動させてインク滴を噴射させるように＃ｌ成さ
れた加圧振動形のインクジェットヘッドの改良に関する
ものであり、常に正！７い噴射が行わわるようにした新
規なヘッドを提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet head, and more particularly, the present invention relates to an inkjet head, and more specifically, a #l structure is used in which a part of a nozzle to which pressurized ink is applied is vibrated by a vibrator to eject ink droplets. This is related to the improvement of the pressurized vibration type inkjet head, and it is always positive! The present invention provides a novel head capable of performing seven jets.
インクジェットヘッドの一１！Ｋ、加圧インク２５（加
えらねるノズルの一部を振動子で振動させてインク滴を
噴射させみように構醪された加圧振動形のインクジェッ
トヘッドがある。このようなヘッドにおける滴化条件は
、振動子の共振周波Ｖが支配的であって、振動子の共振
周波数が温度や経時変（Ｐ等で変化すると、安定な滴仕
が行われなくなってしまう。Inkjet head #1! K. Pressurized ink 25 (There is a pressurized vibration type inkjet head that is configured to eject ink droplets by vibrating a part of the nozzle with a vibrator. Droplet formation conditions in such a head In this case, the resonant frequency V of the vibrator is dominant, and if the resonant frequency of the vibrator changes due to temperature or change over time (P, etc.), stable dripping cannot be performed.
本発明け、このような従来の欠点を解決したものであり
、ヘッドに振動子の振動状態を検出する検出手段を設け
、この検出手段の出力信号に従って振動子の振動を制御
するようにしたものである。The present invention solves these conventional drawbacks, and the head is provided with a detection means for detecting the vibration state of the vibrator, and the vibration of the vibrator is controlled according to the output signal of this detection means. It is.
以下、図面を用いて詳細に説明する。Hereinafter, a detailed explanation will be given using the drawings.
第１図は、本発明の一実施例を示す構成欣明図であって
、１けノズル、２け振動子、５け発振器、４け検出手段
とし、て用いるセンサ、５けアンプ、６けインクチュー
ブである。FIG. 1 is a configuration diagram showing one embodiment of the present invention, which includes a one-piece nozzle, a two-piece vibrator, a five-piece oscillator, a four-piece sensor used as a detection means, a five-piece amplifier, and a six-piece oscillator. It's an ink tube.
ノズル１内には、インクチニープロを介して加圧さ引た
インクが加えらｈる。振動子２とし、ては、例えば筒状
に形成さｆまた超９＃振動子を用いる。Pressurized ink is applied to the inside of the nozzle 1 via an ink tinny pro. As the vibrator 2, for example, a cylindrical 9# vibrator is used.
この振動子２け、発振器３で励振さガることにより長手
方向に伸縮振動を生じる。発振器５は、振動子２を励Ｖ
＝するたｔのものであって、ｆｖ！旅例では、アンプ５
の出力信号に従って発振周波数が制御さｆ′ｌるものを
用いるーセンサ４け、振動子２の振動状態を電気的に検
出するものであって、例えば圧電素子を用いる。このセ
ンサ４け、振動子２の表面に配置されている。アンプ５
け、センサ４の出力付会を増幅し、制瓶信妥として発振
器３に送出する。These two vibrators are excited by the oscillator 3 to generate stretching vibration in the longitudinal direction. The oscillator 5 excites the resonator 2 with V
= of t, and fv! In the travel example, amplifier 5
Four sensors whose oscillation frequency is controlled according to the output signal of f'1 are used to electrically detect the vibration state of the vibrator 2, and for example, a piezoelectric element is used. These four sensors are arranged on the surface of the vibrator 2. Amplifier 5
Then, the output signal of the sensor 4 is amplified and sent to the oscillator 3 as a bottle control signal.
このように構成された装置の動作について訝明する。We will now discuss the operation of the device configured in this way.
センサ４け、振動子２の表面に配置されているので、振
動子２と同様に振動され、例えば第２図のように振動子
２の共振周波数で急峻な最大出力となる出力特性を示す
。すなわち、振動子２の共振周波数が何らかの原因で変
化した場合には、センサ４の出力信号は急激に減少する
ことになる。Since the four sensors are arranged on the surface of the vibrator 2, they are vibrated in the same way as the vibrator 2, and exhibit an output characteristic in which the maximum output is steep at the resonant frequency of the vibrator 2, as shown in FIG. 2, for example. That is, if the resonant frequency of the vibrator 2 changes for some reason, the output signal of the sensor 4 will rapidly decrease.
そこで、本実施例では、センサ４の出力信号に従って発
振器３の発振周波数を変化させ、常に振動子２の共振周
波数と等しくなるようにしている。Therefore, in this embodiment, the oscillation frequency of the oscillator 3 is changed according to the output signal of the sensor 4 so that it is always equal to the resonant frequency of the vibrator 2.
具体的には、例えばセンサ４の出力信号の変化量を微分
して、微分値が零になるように発振器５の発振周波数を
変化させればよい。実験によねば、周沖数の賢化量は、
共振周波数が約１００ＫＨｚの振動子の場合、±２５０
Ｈｚ程度で十分であった。Specifically, for example, the amount of change in the output signal of the sensor 4 may be differentiated, and the oscillation frequency of the oscillator 5 may be changed so that the differential value becomes zero. According to the experiment, the amount of wisdom of the Shuoki number is
For a vibrator with a resonant frequency of approximately 100KHz, ±250
About Hz was sufficient.
第３図は、本発明の他の実施例を示す構成説明図であっ
て、第１図と同等部分には同一符号を付している。第３
図において、７け軸、８．９は振動子、１０． Ｈは磁
性体ブロック、１２けコイル、１３け励磁源である。FIG. 3 is a configuration explanatory diagram showing another embodiment of the present invention, in which parts equivalent to those in FIG. 1 are given the same reference numerals. Third
In the figure, 7 axis, 8.9 is a vibrator, 10. H is a magnetic block, 12 coils, and 13 excitation sources.
軸７には、振動子８，９が嵌装されると共に１これら振
動子８，９を挾むようにして所定のギーップを保って磁
性体ブロック１０．１１が長手方向に沿って移動可能に
嵌装さｔている。本ｉＪ！施例では、磁性体ブロック１
０を固定とし、磁性体ブロック１１を可変とする例を示
している。コイル１２け、磁性体ブロック１１の外周に
巻回されている。このコイル１２は、励磁源１３の出力
信号により励磁される一励磁源１３の出カー号の太き、
８！は、七〜す４の出力信号により制御される。すなわ
ち、励磁源Ｂの出力信号の大きさに従って磁性体ブロッ
ク１０，１１１Ｃより振動子８，９を挾む力が変化し、
振動子８゜９の共振周波数が変化することになる。On the shaft 7, vibrators 8 and 9 are fitted, and magnetic blocks 10 and 11 are fitted so as to be movable along the longitudinal direction while maintaining a predetermined gap between the vibrators 8 and 9. I'm here. Book iJ! In the example, magnetic block 1
0 is fixed and the magnetic block 11 is variable. Twelve coils are wound around the outer periphery of the magnetic block 11. This coil 12 is excited by the output signal of the excitation source 13.
8! are controlled by the output signals of 7 to 4. That is, the force that holds the vibrators 8 and 9 between the magnetic blocks 10 and 111C changes according to the magnitude of the output signal of the excitation source B.
The resonant frequency of the vibrator 8°9 will change.
このような＃ｉ成において、発振器３の周波数け、振動
子８，９の共Ｗｓ周波数とｔｉＰ！″等しい値（例えば
＋ｎ０ＫＨｚ）に固定イビされている。一方、励磁源１
３の出力信！ｆｄ、 コイル１２の励Ｓによる磁性体ブ
ロック１０，１４間の磁気吸引力あるいけ磁気反発力で
振動子８，９の共振周波数が発振器６の発振周波数と等
しくなるように、センサ４の出力信号により制御されて
いる。ここで、何らかの原因で振動子８，９の共振周波
数が変化すると、センサ４の出力信号に従って励磁源１
３の出力信号の大きさも変化し、センサ４の出力信号が
常に最大値になるように磁性体ブロック１１を磁気力に
より変位させて振動子８，９の共振周波数を所定の値に
復帰させる。これ（でより、振動子８，９け、常に発振
器３の発振周波数と同一する共振周波数に調整されるこ
とになり、安定な滴噴射が行われることになるー この
ような構成１ｄ１発振器として計算機のクロック信号等
の固定化さねた信号源を用いる場合に特に好適である。In such a #i configuration, the frequency of the oscillator 3, the common Ws frequency of the vibrators 8 and 9, and tiP! ``The excitation source 1 is fixed to an equal value (for example, +n0KHz).
3 output signals! fd, the output signal of the sensor 4 is adjusted so that the resonance frequency of the vibrators 8 and 9 becomes equal to the oscillation frequency of the oscillator 6 due to the magnetic attraction force or magnetic repulsion force between the magnetic blocks 10 and 14 due to the excitation S of the coil 12. controlled by. Here, if the resonance frequency of the vibrators 8 and 9 changes for some reason, the excitation source 1 changes according to the output signal of the sensor 4.
The magnitude of the output signal of the sensor 3 also changes, and the magnetic block 11 is displaced by magnetic force so that the output signal of the sensor 4 always becomes the maximum value, and the resonant frequency of the vibrators 8 and 9 is returned to a predetermined value. As a result, the oscillators 8 and 9 are always adjusted to the same resonance frequency as the oscillation frequency of the oscillator 3, and stable droplet jetting is performed. This is particularly suitable when using a fixed signal source such as a clock signal.
なお、上記実施例では、振動子の振動状態を検出する検
出手段として圧電素子センサを用いる例について説明し
たが、振動子を駆動する発振器の出力電流変化や出力電
圧変化を測定する測定手段を設けておき、その測定結果
に従って発振器の発振周波数を制御するようにしてもよ
い。このような構成によれば、振動子に別途センサを股
上な（てもよく、ヘッド自体の構成の簡略化が図れる。In addition, in the above embodiment, an example was explained in which a piezoelectric element sensor is used as a detection means for detecting the vibration state of a vibrator. Then, the oscillation frequency of the oscillator may be controlled according to the measurement results. According to such a configuration, a separate sensor may be provided on the vibrator, and the configuration of the head itself can be simplified.
また、振動子に印加する電力を便えることＫよっても振
動子の共振周波数が変えられるので、検出手段の出力信
号に応じて発振器の出力信号の大きさく電力）を制御す
るようＫしてもよい。Furthermore, since the resonant frequency of the oscillator can be changed by controlling the power applied to the oscillator, it is also possible to control the magnitude of the output signal of the oscillator (power) according to the output signal of the detection means. good.
以上説明したように、本発明によりば、常に正しい噴射
が行わガる加圧振動形インクジェット−、アトが実現で
き、実用上の効果は大きい。As explained above, according to the present invention, it is possible to realize a pressurized vibrating inkjet ink jet that always performs correct jetting, and has great practical effects.
第１図は本発明の一実施例を示す構成説明図、第２図は
第１図におけるセンサ４の出力特性何回第３ＣｉａＦｉ
本発明の他の実施例を示す構成説明図である。
１・・・ノズル、２，８．９・・・振動子、５・・・発
振器、４・・＋ンサ、５・・・アン７゛、６・・・イン
クチューブ、７・・軸、１０，１１・・・磁性体ブロッ
ク、１２・・・コイル、１３・・・励磁源。
−／FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention, and FIG. 2 shows the output characteristics of the sensor 4 in FIG.
FIG. 6 is a configuration explanatory diagram showing another embodiment of the present invention. 1... Nozzle, 2, 8.9... Vibrator, 5... Oscillator, 4...+sensor, 5... Ann 7゛, 6... Ink tube, 7... Axis, 10 , 11... Magnetic block, 12... Coil, 13... Excitation source. −／
Claims (1)
せてインク滴を噴射させるように構成さレタインクジェ
ットヘッドにおいて、振動子の振動状態を検出する検出
手段を設け、この検出手段の出力信号に従って振動子の
振動を制御することを特徴とするインクジェットヘッド
。In a letter inkjet head configured to eject ink droplets by vibrating a part of the nozzle on which pressurized ink is applied using a vibrator, a detection means for detecting the vibration state of the vibrator is provided, and a detection means for detecting the vibration state of the vibrator is provided. An inkjet head characterized by controlling vibration of a vibrator according to an output signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8848682A JPS58208063A (en) | 1982-05-25 | 1982-05-25 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8848682A JPS58208063A (en) | 1982-05-25 | 1982-05-25 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58208063A true JPS58208063A (en) | 1983-12-03 |
Family
ID=13944123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8848682A Pending JPS58208063A (en) | 1982-05-25 | 1982-05-25 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58208063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8628176B2 (en) | 2007-11-10 | 2014-01-14 | Videojet Technologies Inc. | Electromechanical converter for ink jet printing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5584676A (en) * | 1978-12-21 | 1980-06-26 | Ibm | Method and device for analyzing action of ink jet printing head |
| JPS55109671A (en) * | 1979-02-19 | 1980-08-23 | Ricoh Co Ltd | Driving system of ink jet head |
| JPS5617266A (en) * | 1979-07-20 | 1981-02-19 | Ricoh Co Ltd | Ink jet printer |
| JPS56118869A (en) * | 1980-02-23 | 1981-09-18 | Ricoh Co Ltd | Controlling method for dropletizing distance in ink jet printer |
-
1982
- 1982-05-25 JP JP8848682A patent/JPS58208063A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5584676A (en) * | 1978-12-21 | 1980-06-26 | Ibm | Method and device for analyzing action of ink jet printing head |
| JPS55109671A (en) * | 1979-02-19 | 1980-08-23 | Ricoh Co Ltd | Driving system of ink jet head |
| JPS5617266A (en) * | 1979-07-20 | 1981-02-19 | Ricoh Co Ltd | Ink jet printer |
| JPS56118869A (en) * | 1980-02-23 | 1981-09-18 | Ricoh Co Ltd | Controlling method for dropletizing distance in ink jet printer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8628176B2 (en) | 2007-11-10 | 2014-01-14 | Videojet Technologies Inc. | Electromechanical converter for ink jet printing |
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