JPS63120657A - Ink jet printer head - Google Patents
Ink jet printer headInfo
- Publication number
- JPS63120657A JPS63120657A JP26684786A JP26684786A JPS63120657A JP S63120657 A JPS63120657 A JP S63120657A JP 26684786 A JP26684786 A JP 26684786A JP 26684786 A JP26684786 A JP 26684786A JP S63120657 A JPS63120657 A JP S63120657A
- Authority
- JP
- Japan
- Prior art keywords
- head
- outer diameter
- nozzle
- head body
- vibrator
- 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
- 230000005284 excitation Effects 0.000 abstract description 12
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
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】 弦」むＬｌ 本発明は、インクジェットプリンタにおいて。[Detailed description of the invention] Strings” Ll The present invention relates to an inkjet printer.
振動子により振動を与えてノズルよりインクを噴出する
ヘッドに関する。The present invention relates to a head that ejects ink from a nozzle by applying vibrations using a vibrator.
災末艮！
従来、効率良くインクを噴出するために、特開昭５１−
４１９４５号公報に記載されたヘッドでは、パイプ内の
中途に振動反射板を設け、これより後側部分は、ノズル
の振動に対して実質的に妨げとならないように１、軽く
てしなやかな材質にしていた。Disaster! Conventionally, in order to eject ink efficiently,
In the head described in Japanese Patent No. 41945, a vibration reflection plate is provided halfway inside the pipe, and the part behind this is made of a light and flexible material so as not to substantially interfere with the vibration of the nozzle. was.
しかしながら、これでは温度変化による振動変化が大き
く、振動効率の調整が難しかった。However, with this, vibration changes due to temperature changes are large, making it difficult to adjust the vibration efficiency.
そこで、本出願人は、そのような問題のないヘッドとし
て、第５図に示す如くインク通路（１）が軸線に沿って
設けられたヘッド本体（２）の先端面（２ａ）にノズル
（３）を接合し、また該ヘッド本体（２）の中途の段部
（２ｂ）に振動子（４）を接合したものを既に提案して
いる。Therefore, the present applicant has developed a head free of such problems by installing nozzles (3 ) and a vibrator (4) joined to the step (2b) in the middle of the head body (2) has already been proposed.
しかし、従来提案したものは、ヘッド本体（２）におい
て、振動子（４）とノズル（３）との間の中間部（２ｃ
）が全長同じ外径、つまり振動子（４）を接合する個所
とノズル（３）を接合する個所とが同じ外径であった６
そのため、振動子（４）の励振効率ＶＰＬＨについて間
層かあった。第６図は、ヘッド本体（２）の振動子接合
個所である段部（２ｂ）とノズル接合個所である先端面
（２ａ）の外径がともに６゜２ＩＩｎの場合の励振効率
特性曲線図で、インクを噴出させるに必要とする周波数
Ｆ、０ＫＨｚに対して励振効率ＶｐＬＨは高くなってい
る。これが高いとヘッドの歩留まりが悪くなる。However, in the conventionally proposed head body (2), the intermediate part (2c) between the vibrator (4) and the nozzle (3)
) had the same outer diameter throughout the entire length, that is, the part where the vibrator (4) was joined and the part where the nozzle (3) was joined had the same outside diameter6.
Therefore, there was a difference in the excitation efficiency VPLH of the vibrator (4). Figure 6 is an excitation efficiency characteristic curve diagram when the outer diameters of the step part (2b) where the vibrator is connected to the head body (2) and the tip surface (2a) where the nozzle is connected are both 6°2IIn. , the excitation efficiency VpLH is higher than the frequency F, which is 0 KHz, which is required to eject ink. If this value is high, the yield of heads will be poor.
且−一枚
本発明の目的は、振動子の励振効率を低くしてヘッドの
品質を向上させ、その歩留まりを良くすることにある。Another object of the present invention is to improve the quality of the head by lowering the excitation efficiency of the vibrator and to improve its yield.
碧−−」叉
そのため９本発明は、ヘッド本体に、振動子を接合する
振動子接合個所とノズルを接合するノズル接合個所を有
するインクジェットプリンタヘッドにおいて、前記ノズ
ル接合個所の外径を前記振動子接合個所の外径よりも小
さくしたものである。Therefore, the present invention provides an inkjet printer head having a vibrator joint part for joining a vibrator and a nozzle joint part for joining a nozzle in the head main body, in which the outer diameter of the nozzle joint part is determined by the diameter of the vibrator joint part. It is smaller than the outer diameter of the joint.
このようにすると、ヘッド本体の振動に対するインピー
ダンスはそのノズル接合個所で小さくなるため、振動子
の励振効率が良くなる。In this way, the impedance to vibration of the head main body is reduced at the nozzle joint location, so that the excitation efficiency of the vibrator is improved.
次に、本発明の実施例を図面に基づいて説明する。Next, embodiments of the present invention will be described based on the drawings.
第１図はその第１実施例で、ヘッド本体（１０）はその
軸線に沿ってインク通路（１１）を設け、また外周面の
中途に段部（１２）を形成している。この段部（１２）
には振動子（１３）が接合され、また先端面（１４）に
はノズル（１５）が接合されている。ヘッド本体（１０
）の外周面は、その段部（１２）から先端面（１４）に
向かって外径が徐々に小さくなり、これらの間の中間部
（１０ａ）は円錐台形になっている。FIG. 1 shows a first embodiment of the present invention, in which a head body (10) has an ink passage (11) along its axis and a step (12) in the middle of its outer circumferential surface. This step (12)
A vibrator (13) is bonded to the oscillator (13), and a nozzle (15) is bonded to the tip surface (14). Head body (10
) has an outer diameter that gradually decreases from the stepped portion (12) toward the distal end surface (14), and the intermediate portion (10a) therebetween has a truncated conical shape.
第２図は第２実施例で、ヘッド本体（１０）の先端部（
１６）の外径を段差的に小さくしたことが第１実施例と
相違している。FIG. 2 shows a second embodiment, in which the tip of the head body (10) (
The difference from the first embodiment is that the outer diameter of 16) is made smaller in steps.
第１実施例におけるヘッド本体（１０）の段部（１２）
の外径Ｒ１および第２実施例における段部（１２）の外
径Ｒを第５図に示した従来例と同じ＜６．２ｍ、第１実
施例における先端面（１４）の外径ＲＬを５．０履、第
２実施例における先端部（１６）の外径Ｒ１を４．０閣
としたときの振動子（１３）の励振効率特性を第３図に
示す、第６図と比較すれば分かるように、インクを噴出
させるに必要とする周波数Ｆ。Stepped portion (12) of head main body (10) in the first embodiment
The outer diameter R1 of the step part (12) in the second embodiment is <6.2 m, the same as the conventional example shown in FIG. 5, and the outer diameter RL of the tip surface (14) in the first embodiment is The excitation efficiency characteristics of the vibrator (13) when the outer diameter R1 of the tip (16) in the second embodiment is 4.0 mm are shown in FIG. 3 and compared with FIG. 6. As you can see, the frequency F required to eject ink.
０ＫＨｚに対して励振効率ＶｐＬＨは従来よりも低くな
っている。For 0 KHz, the excitation efficiency VpLH is lower than before.
また、ヘッド本体（１０）内における振動の伝播波形を
見た場合、第５図の従来のものでは第４図（Ａ）に示す
ようになるところ、本発明の第１実施例では（Ｂ）、第
２実施例では（Ｃ）のようになり、爾実施例ともヘッド
本体（工０）の先端面（１４）における振動波高値が従
来よりも高くなっている。これは、第１実施例では、ヘ
ッド本体（１０）の外径が段部（１２）から先端面（１
４）に向かって徐々に小さくなっているため、振動イン
ピーダンスがそれに応じて小さくなり、また第２実施例
も先端部（１６）の外径が小さく、その分だけ振動イン
ピーダンスが低くなっているためである。Moreover, when looking at the propagation waveform of vibration within the head body (10), the conventional one shown in FIG. 5 shows the waveform shown in FIG. , in the second embodiment, as shown in (C), and in both embodiments, the vibration peak value at the tip surface (14) of the head body (work 0) is higher than that of the conventional one. This is because, in the first embodiment, the outer diameter of the head body (10) is from the stepped portion (12) to the tip surface (1).
4), the vibration impedance decreases accordingly, and also in the second embodiment, the outer diameter of the tip (16) is small, and the vibration impedance decreases accordingly. It is.
勿−−−逮。Of course.
したがって、本発明によれば、振動子の励振特性が向上
しヘッドの歩留まりが良くなる。Therefore, according to the present invention, the excitation characteristics of the vibrator are improved and the yield of the head is improved.
第１図は第１実施例の断面図、第２図は第２実施例の断
面図、第３図はこれら実施例の励振特性曲線図である。
また、第４図はヘッド本体内における振動伝播波形を示
す説明図で、（Ａ）は従来の場合、（Ｂ）は本発明の第
１実施例の場合、（Ｃ）は第２実施例の場合である。第
５図は従来例の断面図、第６図はその励振特性曲線図で
ある。FIG. 1 is a sectional view of the first embodiment, FIG. 2 is a sectional view of the second embodiment, and FIG. 3 is an excitation characteristic curve diagram of these embodiments. Furthermore, FIG. 4 is an explanatory diagram showing vibration propagation waveforms within the head body, in which (A) is the conventional case, (B) is the case of the first embodiment of the present invention, and (C) is the case of the second embodiment. This is the case. FIG. 5 is a sectional view of a conventional example, and FIG. 6 is a diagram of its excitation characteristic curve.
Claims (1)
ノズルを接合するノズル接合個所を有するインクジェッ
トプリンタヘッドにおいて、前記ノズル接合個所の外径
を前記振動子接合個所の外径よりも小さくしたことを特
徴とする、インクジェットプリンタヘッド。 ２、前記ヘッド本体の外径を、前記振動子接合個所より
前記ノズル接合個所に向かって徐々に小さくしたことを
特徴とする、前記特許請求の範囲第１項に記載のインク
ジェットプリンタヘッド。 ３、前記ヘッド本体の外径を、前記ノズル接合個所側に
おいて段差的に小さくしたことを特徴とする、前記特許
請求の範囲第１項に記載のインクジェットプリンタヘッ
ド。[Claims] 1. In an inkjet printer head having a vibrator joint part for joining a vibrator and a nozzle joint part for joining a nozzle in the head body, the outer diameter of the nozzle joint part is equal to the outer diameter of the vibrator joint part. An inkjet printer head characterized by being smaller than the outer diameter. 2. The inkjet printer head according to claim 1, wherein the outer diameter of the head main body is gradually reduced from the vibrator joining location toward the nozzle joining location. 3. The inkjet printer head according to claim 1, wherein the outer diameter of the head main body is reduced stepwise on the side where the nozzle is joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26684786A JPS63120657A (en) | 1986-11-10 | 1986-11-10 | Ink jet printer head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26684786A JPS63120657A (en) | 1986-11-10 | 1986-11-10 | Ink jet printer head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63120657A true JPS63120657A (en) | 1988-05-25 |
Family
ID=17436487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26684786A Pending JPS63120657A (en) | 1986-11-10 | 1986-11-10 | Ink jet printer head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63120657A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7503645B2 (en) * | 2005-12-26 | 2009-03-17 | Hitachi, Ltd. | Droplet generator and ink-jet recording device using thereof |
-
1986
- 1986-11-10 JP JP26684786A patent/JPS63120657A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7503645B2 (en) * | 2005-12-26 | 2009-03-17 | Hitachi, Ltd. | Droplet generator and ink-jet recording device using thereof |
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