JPS6391258A - Ink jet head - Google Patents
Ink jet headInfo
- Publication number
- JPS6391258A JPS6391258A JP23691586A JP23691586A JPS6391258A JP S6391258 A JPS6391258 A JP S6391258A JP 23691586 A JP23691586 A JP 23691586A JP 23691586 A JP23691586 A JP 23691586A JP S6391258 A JPS6391258 A JP S6391258A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- orifice
- ink
- waveguide
- electrically deformable
- 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
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000002747 voluntary effect 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
- B41J2/14201—Structure of print heads with piezoelectric elements
-
- 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
- B41J2002/14338—Multiple pressure elements per ink chamber
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】 発明の目的 （産業上の利用分野） この発明はインクジェットヘッドに関するものである。[Detailed description of the invention] purpose of invention (Industrial application field) This invention relates to an inkjet head.
（従来技術）
従来、例えば第１２図に示すようにオン・デマンド型の
インクジェットヘッドにはヘッド本体１内の後側に圧力
室２を形成しインク供給口３を介してインク４を充填す
るとともに、その圧力室２の後面に配設したピエゾ体等
の電気変形素子５を接合させた構造のものがある。そし
て、電気変形素子５に電斤を印加させ同電気変形素子５
の変形に伴って圧力室２を加圧する。圧力室２に発生し
た圧力は圧力室２内のインク４を媒体として前側の導波
管６を伝わってオリフィス７にあるインク４を押し出す
。(Prior Art) Conventionally, for example, as shown in FIG. 12, in an on-demand type inkjet head, a pressure chamber 2 is formed at the rear side within a head body 1, and ink 4 is filled through an ink supply port 3. There is also a structure in which an electrically deformable element 5 such as a piezo body disposed on the rear surface of the pressure chamber 2 is bonded. Then, an electric current is applied to the electrically deformable element 5, and the electrically deformable element 5
As the pressure chamber 2 deforms, the pressure chamber 2 is pressurized. The pressure generated in the pressure chamber 2 passes through the front waveguide 6 using the ink 4 in the pressure chamber 2 as a medium, and pushes out the ink 4 in the orifice 7.
この時、押し出されたインク４は圧力室２内の圧力低下
によって、オリフィス７内に戻ろうとするものと、さら
に押し出ようとするものとの２つに分れ、その押し出よ
うとするものが液滴８となって飛び出すことになる。At this time, due to the pressure drop in the pressure chamber 2, the pushed out ink 4 is divided into two parts: one that tries to return to the orifice 7, and one that tries to push out further. becomes a droplet 8 and flies out.
従って、このように圧力室２内の圧力をオリフィス７に
集中させる構造は非常に重要で、他のりイブのインクジ
ェットヘッドも同様であった。Therefore, the structure of concentrating the pressure within the pressure chamber 2 on the orifice 7 is very important, and the same applies to other inkjet heads.
（発明が解決しようとする問題点）
ところが、オリフィス７に集中させる構造においては圧
力室２の容積−を比較的大きくしなければならないこと
からインクジェットヘッドが大型化していた。その結果
、高集積なヘッドを製作する上で非常に妨げとなってい
た。(Problems to be Solved by the Invention) However, in the structure in which the inkjet head is concentrated in the orifice 7, the volume of the pressure chamber 2 must be made relatively large, resulting in an increase in the size of the inkjet head. As a result, this has been a serious hindrance to manufacturing a highly integrated head.
この発明の目的は上記問題点を解消すべく、従来のよう
に比較的大きな容積を占める圧力室をなくすことができ
るとともに、大きな圧力を作り出すことができ、しかも
、高集積なヘッドの製作を可能にすることができるイン
クジェットヘッドを提供することにある。The purpose of this invention is to solve the above-mentioned problems, and it is possible to eliminate the pressure chamber that occupies a relatively large volume as in the past, and also to be able to generate a large pressure and to manufacture a highly integrated head. The objective is to provide an inkjet head that can
発明の構成
（問題点を解決するための手段）
この発明は上記目的を達成すべく、先端部がオリフィス
に続き後端部がインク供給部に続き、その後端部側から
インクが供給されるインク導波管を設けるとともに、そ
のインク導波管の壁面において同導波管内に圧力波を発
生させる加圧部材を同管路の長手方向に複数個配設し、
その複数個の加圧部材を前記オリフィスから最も離れて
いるものから順に順次駆動させるようにしたインクジェ
ットヘッドをその要旨とするものである。Structure of the Invention (Means for Solving Problems) In order to achieve the above object, the present invention provides an ink whose front end is connected to an orifice, whose rear end is connected to an ink supply section, and ink is supplied from the rear end side. A waveguide is provided, and a plurality of pressurizing members are arranged in the longitudinal direction of the ink waveguide to generate pressure waves within the waveguide on the wall surface of the ink waveguide,
The gist of the inkjet head is to sequentially drive the plurality of pressure members in order from the one furthest from the orifice.
（作＃Ｊ＞
インク導波管壁面に配設した加圧部材をオリフィスから
最も離れているものから順に順次駆動させると、オリフ
ィスから最も離れている位置から順にオリイスに向って
圧力波が管路内に発生する。(Work #J> When the pressure members disposed on the wall of the ink waveguide are sequentially driven in order from the one furthest from the orifice, pressure waves flow through the pipe from the position furthest from the orifice to the orifice. occurs within.
この順次発生する圧力波はオリフィスに向って進行し、
同圧力波によってオリフィスからインクの液滴が吐出さ
れる。This sequentially generated pressure wave travels towards the orifice,
The same pressure wave causes ink droplets to be ejected from the orifice.
（実施例）
以下、この発明を具体化した一実施例を図面に従って説
明する。(Example) An example embodying the present invention will be described below with reference to the drawings.
第１図はこの発明を具体化したインクジェットヘッドの
要部側断面図を示し、その前後方向（第１図においては
右左方向）に四角筒状のインク導波管１１が形成され、
その先端部にはオリフィス１２が形成されている。イン
ク導波管１１の後端部は図示しないインク供給口を介し
てインク１３を貯留しているタンクと接続されていて、
同導波管１１はその後端部からタンクのインク１３が供
給されるようになっている。FIG. 1 shows a side cross-sectional view of a main part of an inkjet head embodying the present invention, in which a rectangular cylindrical ink waveguide 11 is formed in the front-rear direction (right-left direction in FIG. 1).
An orifice 12 is formed at its tip. The rear end of the ink waveguide 11 is connected to a tank storing ink 13 via an ink supply port (not shown).
Ink 13 from a tank is supplied to the waveguide 11 from its rear end.
前記インク導波管１１の下側内壁には管路に沿って本実
施例では５個の加圧部材としての電気変形素子１４８〜
１４ｅが等間隔に配設されている。In this embodiment, five electrically deformable elements 148 to 148 are provided as pressure members on the lower inner wall of the ink waveguide 11 along the pipe path.
14e are arranged at equal intervals.
電気変形素子１４８〜１４ｅは本実施例ではピエゾ体で
構成され、その上面にマイナス電極１５、下面にプラス
電極１６が固着されている。そして、この両電極１’５
．１６間に電圧を印加すると、電気変形素子１４８〜１
４ｅは電気変形を起し、その変形がインク導波管１１内
に圧力波を発生させることになり、この圧力波がインク
導波管１１内のインク１３を管路長手方向に押し広げる
作用をすることになる。In this embodiment, the electrically deformable elements 148 to 14e are composed of piezo bodies, and have a negative electrode 15 fixed to their upper surface and a positive electrode 16 fixed to their lower surface. Then, both electrodes 1'5
．． When a voltage is applied between 16 and 16, electrically deformable elements 148 to 1
4e causes electrical deformation, and this deformation generates pressure waves within the ink waveguide 11, and this pressure wave acts to spread the ink 13 within the ink waveguide 11 in the longitudinal direction of the pipe. I will do it.
次に、上記のように構成された電気変形素子１４ａ〜１
４ｅを駆動させる電気的構成を第２図に従って説明する
。Next, the electrically deformable elements 14a to 1 configured as described above
The electrical configuration for driving 4e will be explained with reference to FIG.
前記各駆動回路１７８〜１７ｅは電気変形素子１４ａ〜
１４ｅのプラス電極１６にそれぞれ駆動パルス信号ＳＧ
Ｉ〜ＳＧ５を出力し、その駆動パルス信号ＳＧ１〜ＳＧ
５にて電気変形素子１４ａ〜１４ｅを電気変形させるよ
うになっている。駆動制御回路１８は図示しない制御装
置から吐出指令信号を入力し、この指令信号に基づいて
各電気変形素子１４ａ〜１４ｅを予め定めたタイミング
で電気変形させるべく予め定めたタイミングで各駆動回
路１７ａ〜１７ｅに駆動制御信号を出力するようになっ
ている。Each of the drive circuits 178 to 17e includes electrically deformable elements 14a to 17e.
Drive pulse signal SG is applied to each positive electrode 16 of 14e.
I~SG5 are output, and the drive pulse signals SG1~SG
At step 5, the electrically deformable elements 14a to 14e are electrically deformed. The drive control circuit 18 inputs a discharge command signal from a control device (not shown), and operates each drive circuit 17a-17a at a predetermined timing to electrically deform each electrically deformable element 14a-14e at a predetermined timing based on this command signal. A drive control signal is output to 17e.
本実施例ではこのタイミングは、第３図に示すようにオ
リフィス１２から最も遠い電気変形素子１４ａから順に
電気変形素子１４ｂ〜１４ｅを１時間遅れで順次駆動さ
せる駆動パルス信号ＳＧ１〜ＳＧ５を出力するように各
駆動回路１７８〜１７ｅに駆動制御信号を出力する。In this embodiment, this timing is such that drive pulse signals SG1 to SG5 are outputted to sequentially drive the electrically deformable elements 14b to 14e with a delay of one hour, starting from the electrically deformable element 14a furthest from the orifice 12, as shown in FIG. A drive control signal is output to each drive circuit 178 to 17e.
この駆動パルス信号Ｓ０１から順に以後の各駆動パルス
信号ＳＧ２〜ＳＧ５を遅らせるタイミング時間Ｔは第４
図に示すように電気変形素子間の距離をＳ、同電気変形
素子の変形によって発生す６一
る圧力波の伝搬速度をＶとした時、
Ｔ＝Ｓ／Ｖ （秒）
となる時間に予め設定しである。The timing time T that delays each subsequent drive pulse signal SG2 to SG5 in order from this drive pulse signal S01 is the fourth
As shown in the figure, when the distance between the electrically deformable elements is S, and the propagation speed of the pressure wave generated by the deformation of the electrically deformable elements is V, then T = S/V (seconds). It is set.
次に、上記のように構成したインクジェットヘッドの作
用について説明する。Next, the operation of the inkjet head configured as described above will be explained.
今、吐出指令信号を駆動制御回路１８へ入力すると、駆
動制御回路１８はこの指令信号に応答して直ちに駆動回
路１７ａに駆動制御信号を出力する。駆動回路１７ａは
直ちにオリフィス１２から最も遠い電気変形素子１４ａ
に駆動パルス信号Ｓ０１を印加する。Now, when a discharge command signal is input to the drive control circuit 18, the drive control circuit 18 immediately outputs a drive control signal to the drive circuit 17a in response to this command signal. The drive circuit 17a immediately connects the electrically deformable element 14a farthest from the orifice 12.
A drive pulse signal S01 is applied to.
この駆動パルス信号ＳＧ１の印加に基づいて電気変形素
子１４ａが変形し、同電気変形素子１４ａに対応する位
置の導波管１１内に圧力波Ｗａが発生し、同情１１の前
後方向に進行する。この圧力波Ｗａはその位置にある導
波管１１内のインク１３を押し広げる作用をする。そめ
結果、電気変形素子１４ａに対応する位置にある導波管
１１内の前側（第１図において右側）のインク１３は前
方に進行し、反対に導波管１１内の後側（第１図におい
て左側）のインク１３は後方に進行することになる。The electrically deformable element 14a is deformed based on the application of the drive pulse signal SG1, and a pressure wave Wa is generated within the waveguide 11 at a position corresponding to the electrically deformable element 14a, and propagates in the longitudinal direction of the symmetry 11. This pressure wave Wa acts to spread out the ink 13 within the waveguide 11 at that position. As a result, the ink 13 on the front side (right side in FIG. 1) in the waveguide 11 at the position corresponding to the electrically deformable element 14a advances forward, and on the contrary, the ink 13 on the rear side (in FIG. 1) in the waveguide 11 moves forward. The ink 13 (on the left side) will advance backward.
そして、駆動パルス信号ＳＧ１の印加開始後１時間経過
すると、即ち、前記前方に進行した圧力波Ｗａが電気変
形素子１４ｂに対応する位置（距離Ｓ）まで進行すると
、駆動制御回路１８は駆動回路１７ｂに駆動制御信号を
出力する。駆動回路１７ｂは直ちにオリフィス１２から
２番目に遠い電気変形素子１４ｂに駆動パルス信号ＳＧ
２を印加する。Then, when one hour has passed after the start of application of the drive pulse signal SG1, that is, when the pressure wave Wa that has progressed forward advances to a position (distance S) corresponding to the electrically deformable element 14b, the drive control circuit 18 controls the drive circuit 17b. Outputs drive control signals to. The drive circuit 17b immediately applies a drive pulse signal SG to the electrically deformable element 14b that is the second farthest from the orifice 12.
Apply 2.
この駆動パルス信号ＳＧ２を印加に基づいて電気変形素
子１４ｂが変形し、同電気変形素子１４ｂに対応する位
置に圧力波ｗｂが発生し、同圧力波ｗｂが前記と同様に
同情１１の前後方向に進行する。The electric deformable element 14b is deformed based on the application of this drive pulse signal SG2, and a pressure wave wb is generated at a position corresponding to the electric deformable element 14b, and the same pressure wave wb is generated in the front and rear direction of the symmetry 11 in the same manner as described above. proceed.
この時、前方へ進行する圧力波Ｗｂは電気変形素子１４
ｂに対応する位置まで進行してきた前記圧力波Ｗａと合
成され、より大きな合成圧力波Ｗ１となって前方に進行
することになる。At this time, the pressure wave Wb traveling forward is caused by the electric deformation element 14
It is combined with the pressure wave Wa that has progressed to the position corresponding to b, and becomes a larger combined pressure wave W1, which advances forward.
駆動パルス信号ＳＧ２の印加開始後１時間経過すると（
圧力波Ｗ１が電気変形素子１４ｃに対応する位置（距離
Ｓ）まで進行すると）、駆動制御回路１８は駆動回路１
７ｃに駆動制御信号を出力する。駆動回路１７ｃは直ち
にオリフィス１２から３番目に遠い電気変形素子１４Ｃ
に駆動パルス信号ＳＧ３を印加する。When one hour has passed after the start of application of the drive pulse signal SG2 (
When the pressure wave W1 advances to the position (distance S) corresponding to the electrically deformable element 14c), the drive control circuit 18
A drive control signal is output to 7c. The drive circuit 17c immediately moves to the third electric deformable element 14C from the orifice 12.
A drive pulse signal SG3 is applied to.
この駆動パルス信号ＳＧ３の印加に基づいて電気変形素
子１４Ｇが変形し、同電気変形素子１４０に対応する位
置に圧力波Ｗｃが発生し、同圧力波ＷＣが前記と同様に
同情１１の前後方向に進行する。The electric deformable element 14G is deformed based on the application of the drive pulse signal SG3, and a pressure wave Wc is generated at a position corresponding to the electric deformable element 140, and the same pressure wave WC is generated in the front and rear direction of the symmetry 11 in the same manner as described above. proceed.
この時、前記と同様に前方へ進行する圧力波ＷＣは電気
変形素子１４ｃに対応する位置まで進行してきた前記圧
力波Ｗ１と合成され、より大きな合成圧力波Ｗ２となっ
て前方に進行することになる。At this time, similarly to the above, the pressure wave WC traveling forward is combined with the pressure wave W1 that has advanced to the position corresponding to the electric deformation element 14c, and becomes a larger combined pressure wave W2, which travels forward. Become.
以後、同様な動作を繰り返し、電気変形素子１４ｄに対
応する位置にて圧力波Ｗｄ及び同圧力波Ｗｄと前記合成
圧力波Ｗ２との合成された合成圧力波Ｗ３が形成され、
電気変形素子１４ｅに対応する位置にて圧力波Ｗｅ及び
同圧力波Ｗｅと前記合成圧力波Ｗ３との合成された合成
圧力波ｗ４が形成されることになる。Thereafter, the same operation is repeated, and a pressure wave Wd and a composite pressure wave W3, which is a combination of the pressure wave Wd and the composite pressure wave W2, are formed at a position corresponding to the electrically deformable element 14d.
A pressure wave We and a composite pressure wave W4, which is a combination of the pressure wave We and the composite pressure wave W3, are formed at a position corresponding to the electrically deformable element 14e.
従って、電気変形素子１４ｅに対応する位置から前方、
即ち、オリフィス１２へ進行する合成圧力波Ｗ４は各圧
力波Ｗａ〜ｗｅの合成された圧力波であって、非常に大
きな圧力波となる。そして、この圧力波Ｗ４はオリフィ
ス１２まで達し同オリフィス１２からインク１３の液滴
１３ａを吐出させ、インクジェットヘッドの吐出動作は
終了する。Therefore, forward from the position corresponding to the electrically deformable element 14e,
That is, the composite pressure wave W4 traveling toward the orifice 12 is a composite pressure wave of the pressure waves Wa to we, and becomes a very large pressure wave. Then, this pressure wave W4 reaches the orifice 12 and causes droplets 13a of the ink 13 to be ejected from the orifice 12, and the ejection operation of the inkjet head is completed.
このように本実施例では電気変形素子１４８〜１４ｅを
予め定めたタイミングで駆動させるだけで、オリフィス
１２から液滴１３ａを吐出するのに充分な圧力波Ｗ４を
形成することができる。As described above, in this embodiment, a pressure wave W4 sufficient to eject the droplet 13a from the orifice 12 can be generated simply by driving the electrically deformable elements 148 to 14e at predetermined timings.
ちなみに、合成された圧力波Ｗ４の圧力の大きさＰは５
個の各電気変形素子１４ａ〜１４ｅによって発生する圧
力の大きさをそれぞれｐとし、その内前方に進行する圧
力波ｗａ−ｗｅの圧力の大きさをｐ／２とすると、
Ｐ＝５ｐ／２
で表わされることになる。By the way, the pressure magnitude P of the combined pressure wave W4 is 5.
If the magnitude of the pressure generated by each of the electrically deformable elements 14a to 14e is p, and the magnitude of the pressure of the pressure wave wa-we traveling forward is p/2, then P=5p/2. It will be expressed.
従って、所望する大きさＰの合成圧力波Ｗ４を得るため
には、電気変形素子の数をｎ個とすると、ｐ＝２Ｐ／ｎ
なや大きさの圧力を各電気変形素子で発生させればよい
ことになる。Therefore, in order to obtain a composite pressure wave W4 of desired magnitude P, if the number of electrically deformable elements is n, then a pressure of approximately p=2P/n must be generated in each electrically deformable element. It will be a good thing.
しかも、電気変形素子１４ａ〜１４ｅをインク導波管１
１の壁面に配設するだけで、従来のように容積の比較的
大きな圧力室を必要としないことから、インクジェット
ヘッドの小型化を図ることができ、高集積化が可能とな
る。Moreover, the electrically deformable elements 14a to 14e are connected to the ink waveguide 1.
By simply disposing the inkjet head on one wall, there is no need for a pressure chamber with a relatively large volume as in the past, so the inkjet head can be downsized and highly integrated.
尚、前記実施例では各電気変形素子１４８〜１４ｅの間
隔を等間隔に配設したが、その間隔を適宜変更したり、
不等間隔にして実施してもよい。In the above embodiment, the electrically deformable elements 148 to 14e are arranged at equal intervals, but the intervals may be changed as appropriate, or
It may be performed at irregular intervals.
この場合、その間隔に応じて電気変形素子１４８〜１４
ｅの駆動タイミングは適宜変更されることになる。又、
前記実施例では５．個の電気変形素子１４８〜１４ｅを
用いて実施したがその数を適宜変更して実施してもよい
ことは勿論である。In this case, the electrically deformable elements 148 to 14
The drive timing of e will be changed as appropriate. or,
In the above embodiment, 5. Although the embodiment was carried out using the electrically deformable elements 148 to 14e, it goes without saying that the number may be changed as appropriate.
さらに、第５図に示すようにインク導波管１１の上側壁
面に前記各電気変形素子１４ａ〜１４８と相対向するよ
うに新たな電気変形素子２１ａ〜２１ｅを配設して実施
してもよい。この場合、より大きな合成圧力波を形成す
ることができることになる。又、第６図に示すように下
側と１側の電気変形素子１４ａ７−１４−８，２１ａ
〜２１ｄを千鳥状に配設して実施してもよい。この場合
、インク導波管１１の長さを長くしないで、圧力発生箇
所を増加させることができ、より大きな合成圧力波を形
成することができる。Furthermore, as shown in FIG. 5, new electrically deformable elements 21a to 21e may be provided on the upper wall surface of the ink waveguide 11 to face each of the electrically deformable elements 14a to 148. . In this case, a larger combined pressure wave can be formed. In addition, as shown in FIG.
-21d may be arranged in a staggered manner. In this case, the number of pressure generation points can be increased without increasing the length of the ink waveguide 11, and a larger combined pressure wave can be formed.
さらに、前記実施例では各箇所に電気変形素子１４８〜
１４ｅを単体で配設したが、これを第７図に示すように
インク導波管１１に沿って伸びる板状の電気変形素子２
２をインク導波管１１の壁面に配設し、その上面に共通
マイナス電極２３を固着し、下面に複数個のプラス電極
２４ａ〜２４ｅを固着し、各プラス電極２４ａ〜２４ｅ
に対応する位置のインク導波管１１内に圧力波を発生さ
せるようにしてもよい。この場合、製作工程がよ。Furthermore, in the embodiment, electrically deformable elements 148 to 148 are provided at each location.
14e is provided as a single unit, but as shown in FIG.
2 is disposed on the wall surface of the ink waveguide 11, a common negative electrode 23 is fixed to the upper surface thereof, and a plurality of positive electrodes 24a to 24e are fixed to the lower surface of the common negative electrode 23.
A pressure wave may be generated within the ink waveguide 11 at a position corresponding to the position. In this case, the manufacturing process is important.
り減少することになる。This will result in a decrease.
さらにまた、前記実施例ではインク導波管１１が四角筒
状であったが、第８図及び第９図に示すようにインク導
波管１１を円筒状にし、その外周にリング状の電気変形
素子２５と円筒状の電極２６を交互に配設して実施して
もよい。この場合、電気変形素子２５の変位方向はイン
ク導波管１１の中心方向にあるようにする。Furthermore, in the above embodiment, the ink waveguide 11 had a rectangular cylindrical shape, but as shown in FIGS. The element 25 and the cylindrical electrode 26 may be arranged alternately. In this case, the direction of displacement of the electrically deformable element 25 is set toward the center of the ink waveguide 11.
さらにまた、前記実施例ではリング状の電気変形素子２
５と円筒状の電極２６を交互に配設したが、これを第１
０図及び第１１図に示すようにインク導波管１１に沿っ
て伸びるよう円筒状の電気変形素子とし、その内面に共
通マイナス電極２７、その外面に複数個のプラス電極２
７を固着して実施してもよい。Furthermore, in the embodiment, the ring-shaped electrically deformable element 2
5 and a cylindrical electrode 26 were arranged alternately.
As shown in FIGS. 0 and 11, a cylindrical electrically deformable element extends along the ink waveguide 11, with a common negative electrode 27 on its inner surface and a plurality of positive electrodes 2 on its outer surface.
7 may be fixed and implemented.
又、前記実施例では加圧部材をピエゾ体よりなる電気変
形素子を用いて実施したが、その他の電気変形素子を用
いて実施したり、電気変形素子以外のものであってもよ
く、要はインク導波管１１に内に圧力波を発生させその
圧力波を順次オリフィス側に進行させるようにするもの
であれば何でもよい。Further, in the above embodiment, the pressure member was implemented using an electrically deformable element made of a piezo body, but it may be implemented using other electrically deformable elements or other than the electrically deformable element. Any device may be used as long as it generates pressure waves inside the ink waveguide 11 and causes the pressure waves to proceed sequentially toward the orifice.
発明の効果
以上詳述したように、この発明によれば従来のように比
較的大きな容積を占める圧力室をなくし小型で大きな吐
出圧力を作り出すことができ、しかも、高集積なヘッド
の製作を可能にすることができる優れた効果を有する。Effects of the Invention As detailed above, according to the present invention, it is possible to eliminate the pressure chamber that occupies a relatively large volume as in the past, to create a large discharge pressure in a small size, and to manufacture a highly integrated head. It has excellent effects.
第１図はこの発明を具体化したインクジェットヘッドの
要部側断面図、第２図はインクジェットヘッドを駆動さ
せるための電気ブロック回路図、第３図はインクジェッ
トヘッドに設けた各電気変形素子を駆動させるための各
駆動パルス信号のタイムチャート図、第４図は各電気変
形素子にて生じた圧力波の進行状態を説明するための説
明図、第５図〜第９図はこの発明の詳細な説明するもの
であって、第５図は電気変形素子を上下に配設したイン
クジェットヘッドの要部側断面図、第６図は上下に配設
した電気変形素子を千鳥状に配置したインクジェットヘ
ッドの要部側断面図、第７図は板状の電気変形素子を配
設したインクジェットヘッドの要部側断面図、第８図及
び第９図はインク導波管が円筒状のインクジェットヘッ
ドの要部側断面図及び要部正断面図、第１０図及び第１
１図は電気変形素子が円筒状とした場合の要部側断面図
及び要部正断面図、第１２図は従来のインクジェットヘ
ッドの構成を示す要部側断面図である。
図中、１１はインク導波管、１２はオリフィス、１３は
インク、１４８〜１４ｅは加圧部材としての電気変形素
子、１５はマイナス電極、１６はプラス電極、１７８〜
１７ｅは駆動回路、１８は駆動制御回路、ＳＧ１〜ＳＧ
５は駆動パルス信号、Ｗ ａ〜Ｗｅは圧力波、Ｗ１〜Ｗ
４は合成圧力波である。
特許出願人 版部 秀三
株式会社 豊田自動織機製作所
代 理 人 弁理士 恩１）便室
１’／ｅ
自発手続補正書
昭和６１年１０月１５日
２、発明の名称
インクジェットヘッド
３、補正をする者
事件との関係： 特許出願人
氏名 版部 大王
（名称）
氏 名 ３２１ 株式会社 豊田自動織機製作所
（名 称） 代表者 −１）万年
４、代理人
住所 〒５００ 岐阜市端詰町２番装置 ＜０５８
２＞ ６５−１８１０ （代表）ファックス専用 ＜０
５８２＞６６−１３３９第１２図Figure 1 is a sectional side view of the main parts of an inkjet head that embodies this invention, Figure 2 is an electrical block circuit diagram for driving the inkjet head, and Figure 3 is for driving each electrically deformable element provided in the inkjet head. FIG. 4 is an explanatory diagram for explaining the progress state of the pressure waves generated in each electric deformable element, and FIGS. 5 to 9 are detailed diagrams of the present invention. Fig. 5 is a sectional side view of the main part of an inkjet head in which electrically deformable elements are arranged vertically, and Fig. 6 is a side sectional view of an inkjet head in which electrically deformable elements are arranged vertically in a staggered manner. FIG. 7 is a side sectional view of the main part of an inkjet head in which a plate-shaped electrically deformable element is arranged. FIGS. 8 and 9 are main parts of an inkjet head with a cylindrical ink waveguide. Side sectional view and main part front sectional view, Figures 10 and 1
FIG. 1 is a side sectional view and a front sectional view of the main part when the electrically deformable element is cylindrical, and FIG. 12 is a side sectional view of the main part showing the configuration of a conventional inkjet head. In the figure, 11 is an ink waveguide, 12 is an orifice, 13 is ink, 148 to 14e are electrically deformable elements as pressure members, 15 is a negative electrode, 16 is a positive electrode, 178 to
17e is a drive circuit, 18 is a drive control circuit, SG1 to SG
5 is a driving pulse signal, W a to We are pressure waves, W1 to W
4 is a composite pressure wave. Patent Applicant Shuzo Hanbe Co., Ltd. Toyota Industries Corporation Patent Attorney On 1) Toilet Room 1'/e Voluntary Procedural Amendment Written October 15, 1985 2. Title of Invention Inkjet Head 3. Make amendments. Relationship with the case: Patent applicant name: Daio Hanbe (name) Name: 321 Toyota Industries Corporation (name) Representative: -1) Mannen 4, Agent address: No. 2 Equipment, Hatazume-cho, Gifu City, 500 Japan <058
2> 65-1810 (Representative) Fax only <0
582>66-1339 Figure 12
Claims (1)
に続き、その後端部側からインクが供給されるインク導
波管を設けるとともに、そのインク導波管の壁面におい
て同導波管内に圧力波を発生させる加圧部材を同管路の
長手方向に複数個配設し、その複数個の加圧部材を前記
オリフィスから最も離れているものから順に順次駆動さ
せるようにしたインクジェットヘッド。 ２、加圧部材は電気変形素子である特許請求の範囲第１
項記載のインクジェットヘッド。 ３、電気変形素子はピエゾ素子である特許請求の範囲第
２項記載のインクジェットヘッド。[Claims] 1. An ink waveguide is provided whose front end continues to the orifice, whose rear end continues to the ink supply section, and to which ink is supplied from the rear end side, and the wall surface of the ink waveguide. A plurality of pressurizing members that generate pressure waves within the waveguide are disposed in the longitudinal direction of the pipe, and the plurality of pressurizing members are sequentially driven in order from the one furthest from the orifice. inkjet head. 2. Claim 1, in which the pressure member is an electrically deformable element
Inkjet head described in section. 3. The inkjet head according to claim 2, wherein the electrically deformable element is a piezo element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23691586A JPS6391258A (en) | 1986-10-03 | 1986-10-03 | Ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23691586A JPS6391258A (en) | 1986-10-03 | 1986-10-03 | Ink jet head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6391258A true JPS6391258A (en) | 1988-04-21 |
Family
ID=17007636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23691586A Pending JPS6391258A (en) | 1986-10-03 | 1986-10-03 | Ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6391258A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313345A (en) * | 1989-06-12 | 1991-01-22 | Taiho Ind Co Ltd | Liquid droplet injector and injecting method for liquid droplet |
| US5491500A (en) * | 1993-01-22 | 1996-02-13 | Sharp Kabushiki Kaisha | Ink jet head |
| EP1199173A2 (en) * | 1996-10-29 | 2002-04-24 | Matsushita Electric Industrial Co., Ltd. | Ink jet recording apparatus and its manufacturing method |
| EP1488927A1 (en) * | 2003-06-20 | 2004-12-22 | C.R.F. Società Consortile per Azioni | Method and device for ejecting micro-drops of liquid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5991066A (en) * | 1982-11-17 | 1984-05-25 | Furuno Electric Co Ltd | Ink jet recording pen |
-
1986
- 1986-10-03 JP JP23691586A patent/JPS6391258A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5991066A (en) * | 1982-11-17 | 1984-05-25 | Furuno Electric Co Ltd | Ink jet recording pen |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313345A (en) * | 1989-06-12 | 1991-01-22 | Taiho Ind Co Ltd | Liquid droplet injector and injecting method for liquid droplet |
| US5491500A (en) * | 1993-01-22 | 1996-02-13 | Sharp Kabushiki Kaisha | Ink jet head |
| US5627576A (en) * | 1993-01-22 | 1997-05-06 | Sharp Kabushiki Kaisha | Ink jet head using excited progressive waves |
| EP1199173A2 (en) * | 1996-10-29 | 2002-04-24 | Matsushita Electric Industrial Co., Ltd. | Ink jet recording apparatus and its manufacturing method |
| EP1199173A3 (en) * | 1996-10-29 | 2003-03-05 | Matsushita Electric Industrial Co., Ltd. | Ink jet recording apparatus and its manufacturing method |
| EP1488927A1 (en) * | 2003-06-20 | 2004-12-22 | C.R.F. Società Consortile per Azioni | Method and device for ejecting micro-drops of liquid |
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