JPS62156969A - Liquid jet recording head - Google Patents
Liquid jet recording headInfo
- Publication number
- JPS62156969A JPS62156969A JP29883085A JP29883085A JPS62156969A JP S62156969 A JPS62156969 A JP S62156969A JP 29883085 A JP29883085 A JP 29883085A JP 29883085 A JP29883085 A JP 29883085A JP S62156969 A JPS62156969 A JP S62156969A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- orifice
- recording
- recording liquid
- nozzle
- 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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14032—Structure of the pressure chamber
- B41J2/14048—Movable member in the chamber
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/05—Heads having a valve
Landscapes
- Ink Jet (AREA)
- Recording Measured Values (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、液体吐出口から記録液を液滴として吐出、飛
翔させ、該液滴な紙などの記録媒体に着弾させて記録を
行なう液体噴射記録ヘッド、特に印字信号が加えられた
ときに吐出が行なわれるオンデマンド型の液体噴射記録
ヘッドに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a liquid that performs recording by ejecting and flying a recording liquid as droplets from a liquid ejection port, and making the droplets land on a recording medium such as paper. The present invention relates to an ejecting recording head, particularly an on-demand type liquid ejecting recording head that performs ejection when a print signal is applied.
［従来の技術］
従来より、記録液を吐出、飛翔させて記録を行なう液体
噴射記録法（インクジェット・記録法）が知られている
。該方法に用いられるインクジェット記録装置は、一般
に、記録液を飛翔液滴として吐出噴射させるための液体
吐出口（オリフィス）と、該オリフィスに連通ずる液体
流路（ノズル）および該ノズルの一部に設けられ、該ノ
ズル内の記録液に飛翔液滴を形成するための吐出エネル
ギーを与える吐出エネルギー発生手段とを備えたインク
ジェット記録ヘッドと、該ヘッドに記録液を供給するた
めの液体供給系を備えている。[Prior Art] A liquid jet recording method (inkjet recording method) in which recording is performed by ejecting and flying a recording liquid has been known. The inkjet recording apparatus used in this method generally includes a liquid ejection opening (orifice) for ejecting the recording liquid as flying droplets, a liquid flow path (nozzle) communicating with the orifice, and a part of the nozzle. an inkjet recording head provided with an ejection energy generating means for applying ejection energy to the recording liquid in the nozzle to form flying droplets; and a liquid supply system for supplying the recording liquid to the head. ing.
記録は、吐出エネルギー発生手段を駆動してノズル内の
記録液に吐出エネルギーなイＪ（給し、オリフィスから
記録液を飛翔液滴として吐出させ、この液滴を記録媒体
に着弾させることによって行なうのである。Recording is performed by driving the ejection energy generating means to supply ejection energy to the recording liquid in the nozzle, ejecting the recording liquid as flying droplets from the orifice, and causing the droplets to land on the recording medium. It is.
このようなインクジェット記録装置によって記録を行な
う際に使用される記録液は、一般に顔料や染料等の記録
剤部分と、これを溶解または分散するだめの主に水、ま
たは水と水溶性有機溶剤あるいは非水系溶剤とからなる
溶媒成分とによって° 形成されている。インクジェ
ット記録装置においては、記録液が吐出されるノズル先
端に設けられたオリフィスは、装置の駆動の有無にかか
わらず絶えず装置外部の外気に向けて開放されているこ
とが多い。そのために、記録が行なわれない状態か長時
間にわたる場合には、溶媒の一部がオリフィスから外気
中へ蒸発し、記録剤成分や揮発しにくい溶媒成分が記録
液中に残存することにより、この部分に滞留した記録液
の組成が変化して粘度が増大し、結果としてノズル部分
の粘性抵抗が増大する。そのため、印字体止後の記録再
開時直後においては、吐出用信号が印加されているにも
かかわらず、液滴が吐出されない液滴の吐出不良が起き
易く、記録画像の初期印字部等に欠陥を生じるという問
題があった。The recording liquid used when recording with such an inkjet recording device generally consists of a recording agent such as a pigment or dye, and a medium for dissolving or dispersing it, mainly water, or water and a water-soluble organic solvent, or water and a water-soluble organic solvent. It is formed by a non-aqueous solvent and a solvent component consisting of a non-aqueous solvent. In an inkjet recording device, an orifice provided at the tip of a nozzle through which recording liquid is ejected is often constantly open to the outside air of the device, regardless of whether or not the device is being driven. Therefore, when recording is not performed or for a long period of time, some of the solvent evaporates from the orifice into the outside air, and recording agent components and solvent components that are difficult to volatilize remain in the recording liquid. The composition of the recording liquid stagnant in the nozzle portion changes and the viscosity increases, resulting in an increase in the viscous resistance of the nozzle portion. Therefore, immediately after restarting recording after the printing material has stopped, droplet ejection failure is likely to occur, in which droplets are not ejected even though the ejection signal is applied, and defects may occur in the initial printed area of the recorded image. There was a problem in that it caused
また、インクジェット記録装置によって液滴を繰り返し
吐出させるためには、吐出によって失われた分の液体を
次の吐出までに補充しなければならない。そのための代
表的な方法は、液体の表面張力を利用し、毛細管現象に
よって液体をオリフィスに導くというものである。この
場合、液体をオリフィスに導くのに要する時間ｔ２は、
ｔ２＝ｄ／ｕ
によって定まる。ただし、ｄは液滴切断後、ノズルに残
った液体かもとの位置から後退した距離であり、Ｕは毛
細管現象による液体の移動速度である。上記時間ｔ２は
、液滴が形成されるのに要する時間Ｅ、に比べて通常道
かに大きく、
ｆ ＝ １／ ｌ ＋ｔ、、）
で定まる繰り返し駆動可能周波数ｆは、事実ト１゜によ
って制限されてしまい、いかに速く液滴を形成しても、
繰り返し駆動周波数を高くすることができないという問
題があった。Furthermore, in order to repeatedly eject droplets with an inkjet recording apparatus, the amount of liquid lost during ejection must be replenished before the next ejection. A typical method for this purpose is to use the surface tension of the liquid to guide the liquid to an orifice by capillary action. In this case, the time t2 required to introduce the liquid to the orifice is
It is determined by t2=d/u. However, d is the distance that the liquid remaining in the nozzle retreated from its original position after the droplet was cut, and U is the moving speed of the liquid due to capillary action. The above-mentioned time t2 is usually much larger than the time E required for a droplet to form, and the repeatable driving frequency f, which is determined by f = 1/l + t, is, in fact, limited by t1°. However, no matter how quickly the droplets form,
There was a problem in that the repeat drive frequency could not be increased.
［発明が解決しようとする問題点］
本発明は、上記従来例の問題点に鑑みてなされたもので
、長時間放置後にも液滴の吐出不良を生じず、また高い
繰返し駆動周波数による高速記録が可能な新規なインク
ジェット記録ヘットを提イＪ（することを目的とする。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems of the prior art. The purpose is to propose a new inkjet recording head that is capable of
［問題点を解決するための手段］
本発明の上記目的は、以下の本発明によって達成される
。[Means for Solving the Problems] The above objects of the present invention are achieved by the present invention below.
記録液を吐出させるためのオリフィスを備えたインクジ
ェット記録ヘッドにおいて、前記オリフィスの一部また
は全面に、前記記録液の吐出時には該オリフィスを開放
し、前記記録液の非吐出時には該オリフィスを封止する
可動部材を設けたことを特徴とするインクジェット記録
ヘッド。In an inkjet recording head equipped with an orifice for ejecting a recording liquid, the orifice is opened when the recording liquid is ejected to a part or the entire surface of the orifice, and the orifice is sealed when the recording liquid is not ejected. An inkjet recording head characterized by having a movable member.
以下、本発明のインクジェット記録ヘッドにつき、図面
を参照しつつ詳細に“説明する。Hereinafter, the inkjet recording head of the present invention will be described in detail with reference to the drawings.
第１図〜第２図は、木発明のインクジェット記録ヘッド
の一例の概略構成図を示したも′のであり、第１図には
該ヘッドの斜視図が、また第２図には該ヘッドの断面図
が示されている。FIGS. 1 and 2 show a schematic diagram of an example of the inkjet recording head of the Wood Invention. FIG. 1 is a perspective view of the head, and FIG. 2 is a perspective view of the head. A cross-sectional view is shown.
第１図〜第２図において、２がノズル１の先端に位置し
、記録液を飛翔液滴として吐出させるためのオリフィス
である。６はノズル１に連通する液室、７は外部に貯蔵
した記録液を液供給管８を通じて液室６内に導入するた
めの液供給口である。In FIGS. 1 and 2, reference numeral 2 denotes an orifice located at the tip of the nozzle 1 for ejecting recording liquid as flying droplets. 6 is a liquid chamber communicating with the nozzle 1, and 7 is a liquid supply port for introducing recording liquid stored outside into the liquid chamber 6 through a liquid supply pipe 8.
４は基板９上のノズル１の位置する部分に設けられた吐
出エネルギー発生手段としての電気熱変換体である。吐
出エネルギー発生手段は、上記電気熱変換体４の如き熱
エネルギー発生手段によることは必ずしも必要なく、例
えば圧電素子などの圧力エネルギー発生手段としてもよ
い。５は電気熱変換体４を通電加熱するための電極であ
る。Reference numeral 4 denotes an electrothermal converter as a discharge energy generating means provided on the substrate 9 at a portion where the nozzle 1 is located. The ejection energy generating means does not necessarily have to be a thermal energy generating means such as the electrothermal converter 4, and may be a pressure energy generating means such as a piezoelectric element. Reference numeral 5 denotes an electrode for heating the electrothermal converter 4 with electricity.
３が木発明に言う可動部材としての可動弁である。本例
では薄いゴム製の弁とされ、オリフィス２の」−辺にそ
の一辺のみを接着することにより、開閉自在とされてい
る。3 is a movable valve as a movable member referred to in the wooden invention. In this example, the valve is made of thin rubber, and can be opened and closed by bonding only one side to the ``-'' side of the orifice 2.
また本例では、上記基材９および該基材９上に形成され
るノズル１、オリフィス２および液室６の構成壁をガラ
ス製とし、それらを液もれがないように接着するととも
に、電気熱変換体４をスパッタリングによって形成した
ｌ１ｆＢ２からなる薄膜抵抗体、電極５をイオンビーム
蒸着法によって形成したＭ薄膜からなるＭ電極とし、そ
のバターニングをエツチングによっているが、これら部
材の材質や形成方法は特に限定されるものではなく、従
来のインクジェット記録ヘッドにおけると同様の所望の
ものとしてよい。Further, in this example, the base material 9 and the constituent walls of the nozzle 1, orifice 2, and liquid chamber 6 formed on the base material 9 are made of glass, and are bonded to prevent liquid leakage, and are electrically connected. The heat converter 4 is a thin film resistor made of l1fB2 formed by sputtering, the electrode 5 is an M electrode made of an M thin film formed by ion beam evaporation, and the patterning is done by etching. is not particularly limited, and may be the same desired value as in conventional inkjet recording heads.
上記構成において、記録液は、液供給「１７の設けられ
た液室壁に接着された液供給管８を通じて、不図示の記
録液貯蔵容器から液室６に導入され、ノズル１を経てオ
リフィス２に至る。In the above configuration, the recording liquid is introduced into the liquid chamber 6 from a recording liquid storage container (not shown) through a liquid supply pipe 8 bonded to the liquid chamber wall provided with a liquid supply 17, passes through the nozzle 1, and enters the orifice 2. leading to.
この際、可動弁３を有しない従来のインクジェット記録
ヘットでは、記録液の非吐出時にもオリフィス２は開放
されており、吐出不良の原因となる液成分の蒸発を生じ
る。また、記録液とオリフィス２とで形成される液面は
、記録液の表面張力のために、後述する第３図（ｂ）に
示す如くにノズル１方向に向ってＵ字形に後退した状態
でオリフィス２に保持される。At this time, in a conventional inkjet recording head that does not have a movable valve 3, the orifice 2 is open even when recording liquid is not being ejected, causing evaporation of liquid components that cause ejection failure. Furthermore, due to the surface tension of the recording liquid, the liquid surface formed by the recording liquid and the orifice 2 recedes in a U-shape toward the nozzle 1, as shown in FIG. 3(b), which will be described later. It is held in orifice 2.
これに対して可動弁３を有する本例の場合には、記録液
の非吐出時には第２図（ａ）に示す如くに、オリフィス
２が可動弁３によって封止されており、ノズル１内の記
録液１０が直接外気に接することはなく、液中の成分が
大気中に蒸発することがない。また、記録液１０が可動
弁３に接触保持されるために液面が後退することがない
。On the other hand, in the case of this example having the movable valve 3, when the recording liquid is not ejected, the orifice 2 is sealed by the movable valve 3, as shown in FIG. The recording liquid 10 does not come into direct contact with the outside air, and components in the liquid do not evaporate into the atmosphere. Furthermore, since the recording liquid 10 is held in contact with the movable valve 3, the liquid level does not recede.
このような状態でオリフィス２から液滴を吐出させ記録
を行なう。液滴の吐出は、記録パターンに応じた吐出用
信号を、電極５に印加し電気熱変換体４を通電加熱する
ことにより行なう。この加熱により電気熱変換体４に接
する記録液に第２図（ｂ）に如き発泡現象を生じ、生成
した気泡１１の圧力作用によって記録液がオリフィス２
から吐出される。このとき可動弁３は、記録液の吐出圧
により第２図（ｂ）に示される如くに自動的に開放され
るので、記録液の吐出のさまたげとはならない。In this state, droplets are ejected from the orifice 2 to perform recording. The droplet is ejected by applying an ejection signal corresponding to the recording pattern to the electrode 5 and heating the electrothermal transducer 4 with electricity. This heating causes a bubbling phenomenon in the recording liquid in contact with the electrothermal converter 4 as shown in FIG.
It is discharged from. At this time, the movable valve 3 is automatically opened as shown in FIG. 2(b) due to the discharge pressure of the recording liquid, so that it does not interfere with the discharge of the recording liquid.
通電加熱をストップするとノズル１内の消泡が始まり、
気泡１１が収縮する際の圧力降下によって第２図（Ｃ）
に示される如く可動弁３が自動的に閉じ、液滴１２が形
成される。このとき同時にノズル１内の記録液が面進し
、これに伴なって記録液が液室６を通じて供給管８から
補給され、１回の吐出操作が終了し、ノズル１内は第２
図（ａ）の状態に復帰する。その際、可動弁３がない場
合には前述の如き液面の後退を生じることにより、次回
の吐出操作において、記録液を補充するための余分な時
間（ｔ２＝ｄ／ｕ）が必要となる。しかしながら、可動
弁３を有する本例の場合には、該弁３の作用により記録
液の後退距＠ｄがほとんど０となり、高速繰返し吐出が
可能となる。When the electrical heating is stopped, the bubbles inside the nozzle 1 begin to disappear.
Figure 2 (C) due to the pressure drop when the bubble 11 contracts.
The movable valve 3 automatically closes and a droplet 12 is formed as shown in FIG. At the same time, the recording liquid inside the nozzle 1 advances in the plane, and along with this, the recording liquid is replenished from the supply pipe 8 through the liquid chamber 6, and one discharge operation is completed, and the inside of the nozzle 1 is in the second position.
The state returns to the state shown in figure (a). At this time, if there is no movable valve 3, the liquid level will retreat as described above, and extra time (t2 = d/u) will be required to replenish the recording liquid in the next ejection operation. . However, in the case of this example having the movable valve 3, the receding distance @d of the recording liquid becomes almost 0 due to the action of the valve 3, and high-speed repeated discharge becomes possible.
このような可動弁３の効果は、気泡１１の消滅する位置
を観察することによってはっきりと確認することができ
る。そのような状態を説明するための模式図を第３図に
示す。第３図はインクジェット記録ヘッドのノズル部分
を一４二から見たもので、第３図（ａ）は可動弁３を有
する第１図に例示の場合、第３図（ｂ）は比較のために
示した可動弁３を有しない従来例のインクジェット記録
ヘッドの消泡位置の観察スケッチである。第３図の気泡
１１の位置に示されるように、可動弁３がない（ｂ）の
場合には、気泡１１の収縮に伴なうの圧力降下による記
録液の移動は、オリフィス２から液室６へと向かってお
り、オリフィス２に形成される液面（メニスカス）が大
きく後退している。これに対し、可動弁３を有する（ａ
）の場合には、気泡１１の収縮に伴なう圧力降下による
記録液の移動は、液室６からオリフィス２へと向かって
いる。The effect of the movable valve 3 can be clearly confirmed by observing the position where the bubble 11 disappears. A schematic diagram for explaining such a state is shown in FIG. FIG. 3 shows the nozzle part of the inkjet recording head viewed from 142. FIG. 3(a) shows the example shown in FIG. 1 with the movable valve 3, and FIG. 3(b) shows it for comparison. This is an observation sketch of the defoaming position of the conventional inkjet recording head that does not have the movable valve 3 shown in FIG. As shown in the position of the bubble 11 in FIG. 3, in the case of (b) without the movable valve 3, the recording liquid moves from the orifice 2 to the liquid chamber due to the pressure drop caused by the contraction of the bubble 11. 6, and the liquid level (meniscus) formed in the orifice 2 has receded significantly. On the other hand, it has a movable valve 3 (a
), the recording liquid moves from the liquid chamber 6 to the orifice 2 due to the pressure drop accompanying the contraction of the bubble 11.
従って、可動弁を有する本発明の場合には、上記第３図
（ａ）の状態から気泡が消えた直後に次の吐出をさせる
ことが可能であり、高速繰返し記録を行なえるのに対し
、可動弁を有しない従来例の場合には、第３図（ｂ）の
如くに大きく後退したメニスカスがオリフィスに復帰す
るまで長い時間を要し、高速繰返し記録が行なえなかっ
たのである。Therefore, in the case of the present invention having a movable valve, it is possible to perform the next discharge immediately after the bubble disappears from the state shown in FIG. 3(a), and high-speed repeat recording can be performed. In the case of the conventional example without a movable valve, as shown in FIG. 3(b), it took a long time for the meniscus that had retreated significantly to return to the orifice, making it impossible to perform high-speed repetitive recording.
第４図は、本発明のインクジェット記録ヘッドの別の例
を説明するだめの図である。その基本的な構成は、複数
のノズル１を有する以外は、第１図と同様の構成とされ
ている。尚、本例ではノズル１を２４個並列に、１ｍｍ
当り ７．１本の間隔で並べであるが、ノズル数やノズ
ル配列あるいはオリフィス形状等は所望のものとし得る
ことは言うまでもない。FIG. 4 is a diagram for explaining another example of the inkjet recording head of the present invention. Its basic configuration is the same as that shown in FIG. 1 except that it includes a plurality of nozzles 1. In this example, 24 nozzles 1 are arranged in parallel with a diameter of 1 mm.
Although the nozzles are arranged at an interval of 7.1 per nozzle, it goes without saying that the number of nozzles, nozzle arrangement, orifice shape, etc. can be changed as desired.
第５図は、本発明のインクジェット記録ヘッド・ を
用いたインクジェット記録装置の一例としてのインクジ
ェットプリンターであり、第４図に例示の記録ヘッドを
利用したものである。このプリンターは、記録ヘッド１
６をレール１３上で左右に移動させながら記録液を吐出
させ、記録液滴のドツトマトリクスによって記録媒体に
文字を印字するもので、１４は記録媒体としての紙、１
５はプリンタ本体ケースである。FIG. 5 shows an inkjet printer as an example of an inkjet recording apparatus using the inkjet recording head of the present invention, which utilizes the recording head illustrated in FIG. 4. This printer has recording head 1
6 is moved left and right on a rail 13 while discharging a recording liquid, and characters are printed on a recording medium using a dot matrix of recording droplets, 14 is paper as a recording medium, 1
5 is a printer body case.
第１表に、このプリンター１を用いて記録を行なった際
のプリンター性能を、可動弁を取付けた場合（２）と、
取付けない場合（１）の比較として示す。第１表に示さ
れる如く、駆動周波数（１秒当りに吐出を行なえる回数
）の向上により、印字速度の飛躍的な向上がはかられて
いることが分る。Table 1 shows the printer performance when recording using this printer 1, when a movable valve is installed (2), and when a movable valve is installed (2).
This is shown as a comparison of case (1) without installation. As shown in Table 1, it can be seen that by increasing the driving frequency (the number of times that ink can be ejected per second), the printing speed can be dramatically improved.
第１表ニブリンターの性能
第６図は、本発明のインクジェット記録ヘットの別の態
様を説明する図である。その基本的な構成は第１図と同
じであるが、オリフィス２が基板に平行なノズルト壁に
おける方形の穴として構成されており、可動弁３は両開
き式のゴム弁とされている。Performance of Niblinter in Table 1 FIG. 6 is a diagram illustrating another embodiment of the inkjet recording head of the present invention. Its basic configuration is the same as that in FIG. 1, but the orifice 2 is configured as a square hole in the nozzle wall parallel to the substrate, and the movable valve 3 is a double-opening rubber valve.
第７図は、本発明のインクジェット記録ヘッドの更に別
の例を説明する図であり、本例ではオリフィス２が基板
９に平行に取付けられた板状部材１７における円形の穴
として構成され、可動弁３は６枚のゴム片とされている
。FIG. 7 is a diagram illustrating still another example of the inkjet recording head of the present invention. In this example, the orifice 2 is configured as a circular hole in a plate member 17 attached parallel to the substrate 9, and is movable. The valve 3 is made of six rubber pieces.
上記各側においては、可動弁をオリフィス全面を覆うよ
うに設けたが、必ずしもオリフィス全面を覆う必要はな
く、その一部のみを覆うように設けてもよい。もちろん
、その形状は特に限定されるものではなく、オリフィス
形状に応じた所望のものとしてよい。また、上記のいず
れにおいても可動弁をゴム製としであるが、プラスチッ
ク、金属等の他の材質のものであってもよい。更には、
可動弁はオリフィスあるいはノズル構成部材と一体化さ
れたものであってもよい。第８図はそのような一体化の
例であり、可動弁３はノズル壁１と一体化されたゴム弁
とされている。また、可動弁の開閉は」−記の如くに必
ずしも記録液の吐出圧を利用した機械的な開閉機構によ
る必要はなく、電気的あるいは磁気的な手段を用いて自
動開閉するようにしてもよい。もちろん、本発明におけ
る可動部材は−に記のような可動弁に限定されるもので
はなく、例えば自動スライド機構を備えたスライド扉な
どであってもよい。Although the movable valves are provided to cover the entire surface of the orifice on each side, it is not necessary to cover the entire surface of the orifice, and may be provided to cover only a portion thereof. Of course, the shape is not particularly limited, and may be any desired shape depending on the orifice shape. Further, in all of the above, the movable valve is made of rubber, but it may be made of other materials such as plastic or metal. Furthermore,
The movable valve may be integral with the orifice or nozzle component. FIG. 8 shows an example of such integration, in which the movable valve 3 is a rubber valve integrated with the nozzle wall 1. Furthermore, the opening and closing of the movable valve does not necessarily have to be done by a mechanical opening and closing mechanism that utilizes the discharge pressure of the recording liquid as described in ``-'', but may be automatically opened and closed by using electrical or magnetic means. . Of course, the movable member in the present invention is not limited to the movable valve as described in -, but may also be, for example, a sliding door equipped with an automatic sliding mechanism.
［発明の効果］
以上説明したように、本発明によって、非吐出時の記録
液の蒸発が防止され、長時間の放置後にも液滴の吐出不
良を生じず、また液滴吐出時のオリフィスからの液面の
後退が防止され、高い繰返し周波数での高速記録が可能
な新規なインクジェット記録ヘッドを提供できるように
なった。[Effects of the Invention] As explained above, according to the present invention, evaporation of the recording liquid during non-ejection is prevented, droplet ejection failure does not occur even after being left for a long time, and droplet discharge does not occur from the orifice during droplet ejection. It is now possible to provide a new inkjet recording head that prevents the liquid level from receding and enables high-speed recording at a high repetition rate.
第１図は、本発明のインクジェット記録ヘッドの一例を
説明する図、第２図（ａ）は本発明のインクジェット記
録ヘッド記録液の非吐出時の状態を説明する図、第２図
（ｂ）〜（Ｃ）は吐出時の状態を説明する図、第３図（
ａ）は本発明のインクジェット記録ヘッドの消泡時の状
態を説明する図、第３図（ｂ）は従来例のインクジェッ
ト記録ヘッドの消泡時の状態を説明する図、第４図は本
発明のインクジェット記録ヘッドの別の例を説明する図
、第５図は第４図のインクジェット記録ヘッドを用いた
インクジェットプリンターの例を説明する図、第６図〜
第８図はそれぞれ本発明のインクジェット記録ヘッドの
更に別の例を説明する図である。
１・・・ノズル ２・・・オリフィス３・・・
可動弁 ４・・・電気熱変換体５・・・電極
６・・・液室７・・・液供給１１ ８・
・・液供給管９・・・基板 １０・・・記録
液１１・・・気泡 １２・・・液滴１３・・
・レール １４・・・紙１５・・・プリンタ本
体ケースFIG. 1 is a diagram illustrating an example of the inkjet recording head of the present invention, FIG. 2(a) is a diagram illustrating the state of the inkjet recording head of the present invention when recording liquid is not ejected, and FIG. 2(b) ~(C) is a diagram explaining the state at the time of discharge, FIG. 3 (
a) is a diagram explaining the state of the inkjet recording head of the present invention when the bubbles disappear, FIG. 3(b) is a diagram explaining the state of the conventional inkjet recording head when the bubbles disappear, and FIG. 4 is a diagram explaining the state of the inkjet recording head of the present invention when the bubbles disappear FIG. 5 is a diagram illustrating another example of the inkjet recording head of FIG. 4, and FIG. 6 is a diagram illustrating an example of an inkjet printer using the inkjet recording head of FIG.
FIG. 8 is a diagram illustrating still another example of the inkjet recording head of the present invention. 1... Nozzle 2... Orifice 3...
Movable valve 4... Electrothermal converter 5... Electrode
6...Liquid chamber 7...Liquid supply 11 8.
...Liquid supply pipe 9...Substrate 10...Recording liquid 11...Bubble 12...Droplet 13...
・Rail 14...Paper 15...Printer main case
Claims (1)
体噴射記録ヘッドにおいて、前記液体吐出口の一部また
は全面に、前記記録液の吐出時には該液体吐出口を開放
し、前記記録液の非吐出時には該液体吐出口を封止する
可動部材を設けたことを特徴とする液体噴射記録ヘッド
。(1) In a liquid jet recording head equipped with a liquid ejection port for ejecting a recording liquid, when the liquid ejection port is ejected, the liquid ejection port is opened in a part or the entire surface of the liquid ejection port, and the recording liquid is A liquid jet recording head characterized in that a movable member is provided for sealing the liquid ejection port when the liquid is not ejected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29883085A JPS62156969A (en) | 1985-12-28 | 1985-12-28 | Liquid jet recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29883085A JPS62156969A (en) | 1985-12-28 | 1985-12-28 | Liquid jet recording head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62156969A true JPS62156969A (en) | 1987-07-11 |
Family
ID=17864770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29883085A Pending JPS62156969A (en) | 1985-12-28 | 1985-12-28 | Liquid jet recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62156969A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5072241A (en) * | 1989-09-11 | 1991-12-10 | Matsushita Electric Industrial Co., Ltd. | Ink recording apparatus provided with shutter |
| US5200768A (en) * | 1989-11-09 | 1993-04-06 | Matsushita Electric Industrial Co., Ltd. | Ink recording apparatus |
| US5821962A (en) * | 1995-06-02 | 1998-10-13 | Canon Kabushiki Kaisha | Liquid ejection apparatus and method |
| US6007187A (en) * | 1995-04-26 | 1999-12-28 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6062680A (en) * | 1995-09-22 | 2000-05-16 | Canon Kabushiki Kaisha | Liquid ejection head and apparatus and liquid ejection method |
| US6074543A (en) * | 1995-04-14 | 2000-06-13 | Canon Kabushiki Kaisha | Method for producing liquid ejecting head |
| US6095640A (en) * | 1997-12-05 | 2000-08-01 | Canon Kabushiki Kaisha | Liquid discharge head, liquid discharge method, head cartridge and liquid discharge device |
| US6102529A (en) * | 1995-04-26 | 2000-08-15 | Canon Kabushiki Kaisha | Liquid ejecting method with movable member |
| US6109735A (en) * | 1996-06-07 | 2000-08-29 | Canon Kabushiki Kaisha | Liquid discharging method, liquid supplying method, liquid discharge head, liquid discharge head cartridge using such liquid discharge head, and liquid discharge apparatus |
| US6151049A (en) * | 1996-07-12 | 2000-11-21 | Canon Kabushiki Kaisha | Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head |
| US6164763A (en) * | 1996-07-05 | 2000-12-26 | Canon Kabushiki Kaisha | Liquid discharging head with a movable member opposing a heater surface |
| US6183068B1 (en) | 1996-07-12 | 2001-02-06 | Canon Kabushiki Kaisha | Liquid discharging head, head cartridge, liquid discharging device, recording system, head kit, and fabrication process of liquid discharging head |
| US6206508B1 (en) | 1995-09-04 | 2001-03-27 | Canon Kabushiki Kaisha | Liquid ejecting method, liquid ejecting head, and head cartridge using same |
| US6213592B1 (en) | 1996-06-07 | 2001-04-10 | Canon Kabushiki Kaisha | Method for discharging ink from a liquid jet recording head having a fluid resistance element with a movable member, and head, head cartridge and recording apparatus using that method |
| US6270199B1 (en) | 1995-04-14 | 2001-08-07 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6305789B1 (en) | 1995-01-13 | 2001-10-23 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6312111B1 (en) | 1995-01-13 | 2001-11-06 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6331050B1 (en) | 1995-04-14 | 2001-12-18 | Canon Kabushiki Kaisha | Liquid ejecting head and method in which a movable member is provided between flow paths, one path joining a common chamber and ejection orifice, the other, having a heat generating element |
| US6334669B1 (en) | 1995-01-13 | 2002-01-01 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6447093B1 (en) | 1996-07-12 | 2002-09-10 | Canon Kabushiki Kaisha | Liquid discharge head having a plurality of liquid flow channels with check valves |
| US6457816B1 (en) | 1996-07-12 | 2002-10-01 | Canon Kabushiki Kaisha | Liquid discharging method and a liquid jet head, and a head cartridge using such jet head, and a liquid jet apparatus |
| US6464345B2 (en) | 2000-02-15 | 2002-10-15 | Canon Kabushiki Kaisha | Liquid discharging head, apparatus and method employing controlled bubble growth, and method of manufacturing the head |
| US6497475B1 (en) | 1999-09-03 | 2002-12-24 | Canon Kabushiki Kaisha | Liquid discharge method, head, and apparatus which suppress bubble growth at the upstream side |
| US6505915B2 (en) | 1995-09-22 | 2003-01-14 | Canon Kabushiki Kaisha | Liquid ejection head, apparatus and recovery method for them |
| US6533400B1 (en) | 1999-09-03 | 2003-03-18 | Canon Kabushiki Kaisha | Liquid discharging method |
| US6554383B2 (en) | 1996-07-12 | 2003-04-29 | Canon Kabushiki Kaisha | Liquid ejecting head and head cartridge capable of adjusting energy supplied thereto, liquid ejecting device provided with the head and head cartridge, and recording system |
| US6595625B2 (en) | 1996-07-12 | 2003-07-22 | Canon Kabushiki Kaisha | Liquid discharging method accompanied by the displacement of a movable member, a liquid jet head for implementing such method, and a liquid jet apparatus for the implementation thereof |
| US6709090B2 (en) | 1995-09-22 | 2004-03-23 | Canon Kabushiki Kaisha | Liquid ejection method and liquid ejection head therefor |
| US6773092B1 (en) | 1996-07-05 | 2004-08-10 | Aya Yoshihira | Liquid discharging head and liquid discharging device |
-
1985
- 1985-12-28 JP JP29883085A patent/JPS62156969A/en active Pending
Cited By (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5072241A (en) * | 1989-09-11 | 1991-12-10 | Matsushita Electric Industrial Co., Ltd. | Ink recording apparatus provided with shutter |
| US5200768A (en) * | 1989-11-09 | 1993-04-06 | Matsushita Electric Industrial Co., Ltd. | Ink recording apparatus |
| US6305789B1 (en) | 1995-01-13 | 2001-10-23 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6312111B1 (en) | 1995-01-13 | 2001-11-06 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6334669B1 (en) | 1995-01-13 | 2002-01-01 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6652076B2 (en) | 1995-01-13 | 2003-11-25 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6435669B1 (en) | 1995-01-13 | 2002-08-20 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6378205B1 (en) | 1995-04-14 | 2002-04-30 | Canon Kabushiki Kaisha | Method for producing liquid ejecting head and liquid ejecting head obtained by the same method |
| US6074543A (en) * | 1995-04-14 | 2000-06-13 | Canon Kabushiki Kaisha | Method for producing liquid ejecting head |
| US6331050B1 (en) | 1995-04-14 | 2001-12-18 | Canon Kabushiki Kaisha | Liquid ejecting head and method in which a movable member is provided between flow paths, one path joining a common chamber and ejection orifice, the other, having a heat generating element |
| US6270199B1 (en) | 1995-04-14 | 2001-08-07 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6102529A (en) * | 1995-04-26 | 2000-08-15 | Canon Kabushiki Kaisha | Liquid ejecting method with movable member |
| US6007187A (en) * | 1995-04-26 | 1999-12-28 | Canon Kabushiki Kaisha | Liquid ejecting head, liquid ejecting device and liquid ejecting method |
| US6174050B1 (en) * | 1995-04-26 | 2001-01-16 | Canon Kabushiki Kaisha | Liquid ejection head with a heat generating surface that is substantially flush and/or smoothly continuous with a surface upstream thereto |
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| US6663230B2 (en) | 1995-09-22 | 2003-12-16 | Canon Kabushiki Kaisha | Liquid ejection head, apparatus and recovery method for them |
| US6062680A (en) * | 1995-09-22 | 2000-05-16 | Canon Kabushiki Kaisha | Liquid ejection head and apparatus and liquid ejection method |
| US6213592B1 (en) | 1996-06-07 | 2001-04-10 | Canon Kabushiki Kaisha | Method for discharging ink from a liquid jet recording head having a fluid resistance element with a movable member, and head, head cartridge and recording apparatus using that method |
| US6109735A (en) * | 1996-06-07 | 2000-08-29 | Canon Kabushiki Kaisha | Liquid discharging method, liquid supplying method, liquid discharge head, liquid discharge head cartridge using such liquid discharge head, and liquid discharge apparatus |
| US6773092B1 (en) | 1996-07-05 | 2004-08-10 | Aya Yoshihira | Liquid discharging head and liquid discharging device |
| US6164763A (en) * | 1996-07-05 | 2000-12-26 | Canon Kabushiki Kaisha | Liquid discharging head with a movable member opposing a heater surface |
| US6151049A (en) * | 1996-07-12 | 2000-11-21 | Canon Kabushiki Kaisha | Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head |
| US6554383B2 (en) | 1996-07-12 | 2003-04-29 | Canon Kabushiki Kaisha | Liquid ejecting head and head cartridge capable of adjusting energy supplied thereto, liquid ejecting device provided with the head and head cartridge, and recording system |
| US6595625B2 (en) | 1996-07-12 | 2003-07-22 | Canon Kabushiki Kaisha | Liquid discharging method accompanied by the displacement of a movable member, a liquid jet head for implementing such method, and a liquid jet apparatus for the implementation thereof |
| US6457816B1 (en) | 1996-07-12 | 2002-10-01 | Canon Kabushiki Kaisha | Liquid discharging method and a liquid jet head, and a head cartridge using such jet head, and a liquid jet apparatus |
| US6447093B1 (en) | 1996-07-12 | 2002-09-10 | Canon Kabushiki Kaisha | Liquid discharge head having a plurality of liquid flow channels with check valves |
| US6183068B1 (en) | 1996-07-12 | 2001-02-06 | Canon Kabushiki Kaisha | Liquid discharging head, head cartridge, liquid discharging device, recording system, head kit, and fabrication process of liquid discharging head |
| US6439700B1 (en) | 1997-12-05 | 2002-08-27 | Canon Kabushiki Kaisha | Liquid discharge head, liquid discharge method, head cartridge and liquid discharge device |
| US6095640A (en) * | 1997-12-05 | 2000-08-01 | Canon Kabushiki Kaisha | Liquid discharge head, liquid discharge method, head cartridge and liquid discharge device |
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| US6533400B1 (en) | 1999-09-03 | 2003-03-18 | Canon Kabushiki Kaisha | Liquid discharging method |
| US6854831B2 (en) | 1999-09-03 | 2005-02-15 | Canon Kabushiki Kaisha | Liquid discharge method, liquid discharge head, liquid discharge apparatus, and method for manufacturing liquid discharge head |
| US6945635B2 (en) | 1999-09-03 | 2005-09-20 | Canon Kabushiki Kaisha | Liquid discharge method, liquid discharge head, liquid discharge apparatus, and method for manufacturing liquid discharge head |
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