JPS6236871B2 - - Google Patents

Info

Publication number
JPS6236871B2
JPS6236871B2 JP14461879A JP14461879A JPS6236871B2 JP S6236871 B2 JPS6236871 B2 JP S6236871B2 JP 14461879 A JP14461879 A JP 14461879A JP 14461879 A JP14461879 A JP 14461879A JP S6236871 B2 JPS6236871 B2 JP S6236871B2
Authority
JP
Japan
Prior art keywords
ink
flat plate
air
plate
thickness
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
Application number
JP14461879A
Other languages
Japanese (ja)
Other versions
JPS5667272A (en
Inventor
Seiji Yamamori
Masayoshi Miura
Akira Mizoguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14461879A priority Critical patent/JPS5667272A/en
Priority to GB8035504A priority patent/GB2061831B/en
Priority to US06/204,713 priority patent/US4358781A/en
Priority to DE19803041925 priority patent/DE3041925A1/en
Priority to FR8023789A priority patent/FR2469285A1/en
Publication of JPS5667272A publication Critical patent/JPS5667272A/en
Publication of JPS6236871B2 publication Critical patent/JPS6236871B2/ja
Granted legal-status Critical Current

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
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14298—Structure of print heads with piezoelectric elements of disc type
    • 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
    • B41J2002/14387—Front shooter
    • 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
    • B41J2202/02—Air-assisted ejection

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Description

【発明の詳細な説明】 本発明は、インクジエツトヘツドに関するも
の、性能の安定性向上を目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inkjet head and aims to improve the stability of its performance.

第１図、特開昭48−9622号公報に示されたイン
クジエツトヘツドを原型として製作されたインク
ジエツトヘツドの断面図を示す。このインクジエ
ツトヘツドは、インク室が、インク吐出口５に隣
接しておりかつインク流入通路６と直接に結合し
ている１つの外方の室３と、圧力上昇を生じさせ
る装置１を有している内方の室２とに分割されて
おり、これら両方の室２，３がインク吐出口５と
一直線上にある１つの結合通路４を介して互いに
結合されており、電気信号に応じて微小インク液
滴を吐出、停止させ記録媒体表面上にインク液滴
による画像を記録形成する。 FIG. 1 is a sectional view of an ink jet head manufactured using the ink jet head shown in Japanese Patent Application Laid-Open No. 48-9622 as a model. This ink jet head has one outer chamber 3 whose ink chamber is adjacent to the ink outlet 5 and is directly connected to the ink inflow channel 6, and a device 1 for creating a pressure increase. Both chambers 2 and 3 are connected to each other via one coupling passage 4 that is in line with the ink discharge port 5, and are divided into an inner chamber 2 and an inner chamber 2. The fine ink droplets are ejected and stopped to record and form an image using the ink droplets on the surface of the recording medium.

第２図は、第１図のインクジエツトヘツドをさ
らに改良したものであり、インク吐出口５を覆
い、インク吐出口５に対向して空気吐出口８を有
する空気室７を設け、空気吐出口８より空気流を
流出させるものである。電気信号に応じてインク
吐出口５より噴出するインク液滴は、空気流によ
つて飛翔を助けられる。なお第２図に示されたイ
ンクジエツトヘツドの詳細は、特開昭51−37541
号公報、特開昭51−109738号公報、特開昭52−
82426号公報に示されている。 FIG. 2 shows a further improvement of the ink jet head shown in FIG. 8 to allow the air flow to flow out. Ink droplets ejected from the ink ejection ports 5 in response to electrical signals are assisted in flight by air currents. The details of the inkjet head shown in FIG.
Publication No. 109738, Japanese Patent Application Publication No. 1983-109738, Japanese Patent Application Publication No. 1983-10973
This is shown in Publication No. 82426.

本発明は、第１図および第２図に示されたよう
なピエゾ素子などの電歪素子を用いて、電気信号
に応じて電歪素子を振動させ、インク液滴を噴
出、停止させるインクジエツトヘツドの性能を安
定化させることを目的としている。 The present invention uses an electrostrictive element such as a piezo element as shown in FIGS. 1 and 2, and vibrates the electrostrictive element in response to an electric signal to eject and stop ink droplets. The purpose is to stabilize the performance of the head.

第１図および第２図に示されたようなインクジ
エツトヘツドでは、寸法形状がヘツド性能に及ぼ
す影響が大きく、外方の室３および空気室７の寸
法形状も、ヘツド性能に影響を与える構成要素の
１つである。 In the inkjet head shown in FIGS. 1 and 2, the size and shape have a large influence on the head performance, and the size and shape of the outer chamber 3 and the air chamber 7 also have a configuration that affects the head performance. This is one of the elements.

以下まず、外方の室３の寸法形状の与える影響
について述べる。 First, the influence of the dimensions and shape of the outer chamber 3 will be described below.

第３図は、第１図に示されたインクジエツトヘ
ツドのうち外方の室３の拡大図である。外方の室
３は、インク吐出口５と結合通路４との間隔と同
じ厚みをもつ円板状のインク層３１と、該インク
層３１の周囲を取り巻くインク供給溝３２よりな
る。インク供給溝３２については特開昭50−
41432号公報に詳細な説明がなされているが、イ
ンク供給溝３２の効果は、インク供給量の増大化
およびインク供給の円滑性の向上をはかり、イン
クジエツトヘツドの周波数特性を向上させること
にある。 FIG. 3 is an enlarged view of the outer chamber 3 of the ink jet head shown in FIG. The outer chamber 3 includes a disc-shaped ink layer 31 having the same thickness as the distance between the ink discharge port 5 and the coupling passage 4, and an ink supply groove 32 surrounding the ink layer 31. Regarding the ink supply groove 32, please refer to Japanese Patent Application Laid-Open No. 1987-
As detailed in Japanese Patent No. 41432, the effect of the ink supply groove 32 is to increase the amount of ink supplied, improve the smoothness of the ink supply, and improve the frequency characteristics of the ink jet head. .

次に、インク層３１のヘツド性能への影響につ
いて述べる。圧力上昇装置１により生じるインク
流は内方の室２を介して結合通路４に伝搬し、さ
らに、インク層３１を介して、インク吐出口５に
伝搬されてインク液滴となり噴出するが、伝搬経
路において各々の個所に伝搬損失が生じる。イン
ク層３１においてもインク流の伝搬損失が生じる
ことが判明しており、インク層３１の厚みＴIが
大きい程伝搬損失が大きい。すなわち厚みＴIが
大きい程インク流の伝搬エネルギーが、外方の室
３内において失なわれる。したがつてインク層３
１の厚みＴIは小さい程よく、実際の設計寸法も
50〜400μｍと非常に小さな値となつている。 Next, the influence of the ink layer 31 on head performance will be described. The ink flow generated by the pressure increase device 1 propagates through the inner chamber 2 to the coupling passage 4, and further propagates through the ink layer 31 to the ink discharge port 5, where it becomes ink droplets and is ejected. Propagation loss occurs at each location on the path. It has been found that propagation loss of ink flow occurs also in the ink layer 31, and the larger the thickness T I of the ink layer 31, the greater the propagation loss. That is, the larger the thickness T I , the more the propagation energy of the ink flow is lost in the outer chamber 3. Therefore, ink layer 3
The smaller the thickness T I of 1, the better, and the actual design dimensions
It has a very small value of 50 to 400 μm.

インク吐出口５よりインク液滴を吐出させるた
めに必要な圧力上昇装置１に印加される駆動電圧
の最小値を閾値電圧と称するが、上記のインク流
の伝搬損失は、この閾値電圧の大きさと対応させ
ることができる。すなわち閾値電圧が大きい程イ
ンク流の伝搬損失が大きい。 The minimum value of the driving voltage applied to the pressure raising device 1 necessary for ejecting ink droplets from the ink ejection port 5 is called a threshold voltage, and the propagation loss of the ink flow described above is dependent on the magnitude of this threshold voltage. It can be made to correspond. That is, the greater the threshold voltage, the greater the propagation loss of the ink flow.

したがつて、閾値電圧のバラツキをなくすため
には、インク流の伝搬損失のバラツキをなくす必
要がある。インク層３１の厚みＴIのバラツキ
と、閾値電圧のバラツキの対応をとつてみると、
インク吐出口口径50μｍ、結合通路口径100μｍ
の第１図の構成のインクジエツトヘツドの場合、
インク層３１の厚みＴIが100〜150μｍの範囲に
ある時、閾値電圧は20KHz連続正弦波形で約100
〜150VPPの範囲にあつた。すなわち、インク層
３１の厚みＴIが１μｍ変動すると、閾値電圧が
約1VPP変動するという結果が生じた。この結果
は、インクジエツトヘツドを構成する他の要素の
変化によつて異なることを考えられるが、いずれ
にしろインク層３１の厚みＴIがインクジエツト
ヘツドの閾値電圧に及ぼす影響が大きいと推定さ
れる。 Therefore, in order to eliminate the variations in the threshold voltage, it is necessary to eliminate the variations in the propagation loss of the ink flow. When we consider the correspondence between the variation in the thickness T I of the ink layer 31 and the variation in the threshold voltage, we find that
Ink discharge port diameter 50μm, coupling passage diameter 100μm
In the case of an inkjet head with the configuration shown in Figure 1,
When the thickness T I of the ink layer 31 is in the range of 100 to 150 μm, the threshold voltage is approximately 100 μm with a 20 KHz continuous sine waveform.
It was in the range of ~150V PP . That is, when the thickness T I of the ink layer 31 varied by 1 μm, the threshold voltage varied by about 1 V PP . This result may vary depending on changes in other elements constituting the ink jet head, but in any case, it is presumed that the thickness T I of the ink layer 31 has a large effect on the threshold voltage of the ink jet head. Ru.

また、前述のインク供給溝３２は、インク供給
量の増大化と供給の円滑性の向上をはかるもので
あつたが、インク層３１の厚みＴIも、インク供
給量、供給の円滑性に影響を与える。すなわち厚
みＴIが小さすぎると供給量が不足することがあ
り、厚みＴIが均一でなく特に厚みの小さな部分
や大きな部分があるとインクの供給の際に生じる
インクの流れが不均一となり円滑性を欠くことに
なる。 Furthermore, although the above-mentioned ink supply groove 32 is intended to increase the amount of ink supplied and improve the smoothness of the supply, the thickness T I of the ink layer 31 also affects the amount of ink supplied and the smoothness of the supply. give. In other words, if the thickness T I is too small, the supply amount may be insufficient, and if the thickness T I is not uniform and there are particularly small or large parts, the ink flow that occurs when ink is supplied will be uneven, making it difficult to maintain smooth flow. You will lack sex.

従来、インク層３１の制御は、ボデイ部分１０
の機械的寸法精度によつてなされていた。すなわ
ち第３図において、ボデイ部分１０の接着面１３
および接着面１４の寸法精度をだしておき、それ
ぞれの接着面に、結合通路４を有する壁（以後ノ
ズル板１１と称する）および、インク吐出口５を
有する壁（以後ノズル板１２と称する）を接着し
ていた。しかしこのような従来の方法では、ノズ
ル板１１の厚み及び接着面１３，１４に塗布され
る接着剤１３１，１４１の厚み均等でなければ、
インク層３１の厚みＴIの精度がでず、さらに接
着剤によつてノズル板１１，１２をボデイ部分に
接着する際に、ノズル板にたわみが生じる場合が
あり、インク層３１の厚みＴIの精度が低下して
いた。 Conventionally, the ink layer 31 is controlled by the body portion 10.
This was achieved with mechanical dimensional accuracy. That is, in FIG. 3, the adhesive surface 13 of the body portion 10
The dimensional accuracy of the bonding surfaces 14 is maintained, and a wall having the coupling passage 4 (hereinafter referred to as the nozzle plate 11) and a wall having the ink ejection ports 5 (hereinafter referred to as the nozzle plate 12) are attached to each bonding surface. It was glued. However, in such a conventional method, if the thickness of the nozzle plate 11 and the thickness of the adhesives 131 and 141 applied to the adhesive surfaces 13 and 14 are not equal,
The thickness T I of the ink layer 31 is not accurate, and when the nozzle plates 11 and 12 are bonded to the body part with an adhesive, the nozzle plate may be bent . accuracy had decreased.

次に、第２図に示されたような、空気流を利用
したインクジエツトヘツドについて、空気室７の
寸法形状のインクジエツトヘツドの性能に及ぼす
影響を述べる。 Next, regarding an ink jet head using air flow as shown in FIG. 2, the influence of the size and shape of the air chamber 7 on the performance of the ink jet head will be described.

第４図は、第２図に示したインクジエツトヘツ
ドの空気室７および外方の室３の部分の拡大図で
ある。第４図において、空気室７は空気層７１お
よび空気供給溝７２よりなつている。空気供給溝
７２の効果については、特開昭51−147917号公報
に詳細な説明が記載されているが、要約すると、
空気供給溝７２は空気流を円滑かつ乱流にならな
いようにし、インク液滴の飛翔状態を安定化させ
るものである。 FIG. 4 is an enlarged view of the air chamber 7 and outer chamber 3 of the ink jet head shown in FIG. In FIG. 4, the air chamber 7 consists of an air layer 71 and an air supply groove 72. A detailed explanation of the effect of the air supply groove 72 is given in Japanese Unexamined Patent Publication No. 147917/1982, but to summarize:
The air supply groove 72 makes the air flow smooth and free from turbulence, thereby stabilizing the flying state of the ink droplets.

また空気層７１特に厚みＴAに関しては、特開
昭52−82426号公報に詳細な説明が記載されてい
る。 A detailed explanation of the air layer 71, particularly the thickness T A , is given in Japanese Patent Application Laid-open No. 82426/1983.

次に第５図は、第２図に示したインクジエツト
ヘツド、インク供給装置および空気供給装置を、
第６図は空気層７１の厚みＴAと最低記録濃度の
関係を、また第７図は、空気層７１の厚みＴA
と、インク溜１８に印加される圧力Ｐと空気室７
に印加される圧力ＰOの比Ｐ／ＰOとの関係を示し
ている。これらに従つてインク層７１の厚みＴA
の影響を要約すると以下のようになる。 Next, FIG. 5 shows the ink jet head, ink supply device, and air supply device shown in FIG.
FIG. 6 shows the relationship between the thickness T A of the air layer 71 and the minimum recording density, and FIG. 7 shows the relationship between the thickness T A of the air layer 71 and the minimum recording density.
, the pressure P applied to the ink reservoir 18 and the air chamber 7
The relationship between the pressure P O applied to the pressure P O and the ratio P/P O is shown. According to these, the thickness T A of the ink layer 71
The effects of this can be summarized as follows.

(1) 第６図より、厚みＴAが小さい程、低濃度の
記録が可能となり、階調性が向上する。(1) From FIG. 6, the smaller the thickness TA , the lower the density recording becomes possible and the gradation improves.

(2) 第５図に示されているように、インク吐出口
５におけるインキのメニスカスを安定に保つた
め、空気供給源１９より空気流が空気室７に送
られると同時に、インク溜１８にも送られる
が、インク溜１８に印加される圧力Ｐと空気室
７の圧力ＰOの比Ｐ／ＰO、空気層７１の厚みＴ
Aが小さくなる程小となる。(2) As shown in FIG. 5, in order to keep the ink meniscus at the ink discharge port 5 stable, an air flow is sent from the air supply source 19 to the air chamber 7 and at the same time to the ink reservoir 18. The ratio of the pressure P applied to the ink reservoir 18 and the pressure P O of the air chamber 7 is P/P O , and the thickness T of the air layer 71
The smaller A becomes, the smaller it becomes.

このことより容易に想定できるように、厚みＴ
Aの寸法精度がインクジエツトヘツドの階調特性
および圧力バランス状態のバラツキの原因とな
る。すなわち厚みＴAが80μｍ以下の値にあり、
階調性に優れたインクジエツトヘツドにおいて
は、厚みＴAの寸法のバラツキによる階調性の変
動が大きく、さらにインク吐出口でのインキのメ
ニスカスを安定に保つために印加されているイン
ク溜の圧力Ｐの変動も大きい。そのため厚みＴA
の寸法精度が高くないとインクジエツトヘツドの
互換性がなく、インクジエツトヘツドを交換する
たびに、電気信号１７の設定条件や、インク溜１
８に印加される圧力Ｐの設定値を変更しなければ
ならないことになる。 As can be easily assumed from this, the thickness T
The dimensional accuracy of A causes variations in the gradation characteristics and pressure balance state of the ink jet head. In other words, the thickness T A is 80 μm or less,
In an inkjet head with excellent gradation, the gradation fluctuates greatly due to variations in the thickness TA , and in addition, the ink reservoir is applied to maintain a stable ink meniscus at the ink ejection port. Fluctuations in pressure P are also large. Therefore, the thickness T A
If the dimensional accuracy of the inkjet head is not high, the inkjet heads will not be compatible, and each time the inkjet head is replaced, the setting conditions of the electrical signal 17 and the ink reservoir 1
This means that the set value of the pressure P applied to 8 must be changed.

従来、空気層７１の制御は、インク層３１の場
合と同様に、ボデイ部分１０の機械的寸法精度、
すなわちボデイ部分１０の接着面１４及び接着面
１６の寸法精度のみに依存していた。したがつ
て、インク層３１の従来方式と同様な欠点によつ
て空気層７１の厚みＴAの精度が低下していた。 Conventionally, the air layer 71 is controlled based on the mechanical dimensional accuracy of the body portion 10, as in the case of the ink layer 31.
In other words, it depends only on the dimensional accuracy of the bonding surfaces 14 and 16 of the body portion 10. Therefore, the accuracy of the thickness T A of the air layer 71 was reduced due to the same drawbacks as in the conventional method of the ink layer 31.

以上詳細に説明したように、従来の組立方式で
はインク層３１の厚みＴI、および、空気層７１
の厚みＴAの寸法精度が低く、インクジエツトヘ
ツドの性能のバラツキが大きかつた。 As explained in detail above, in the conventional assembly method, the thickness T I of the ink layer 31 and the air layer 71
The dimensional accuracy of the thickness T A was low, and the performance of the ink jet head varied widely.

本発明は、上記のインク層３１の厚みＴIおよ
び空気層７１の厚みＴAの寸法精度をあげ、イン
クジエツトヘツドの性能の均一化をはかるもので
ある。 The present invention aims to improve the dimensional accuracy of the thickness T I of the ink layer 31 and the thickness T A of the air layer 71, thereby making the performance of the ink jet head uniform.

以下図面をもとに本発明について詳細に説明す
る。第８図は、本発明を第１図のインクジエツト
ヘツドに採用した実施例である。図に示されてい
るように、ノズル板１１とノズル板１２が間隔調
整板２３を介して結合されており、インク層３１
の厚みＴIは、間隔調整板２３の厚みに等しくな
り、厚みＴIの寸法精度を大幅に向上させること
ができる。このインクジエツトヘツドの組立方法
は、あらかじめ接着面１３と接着面１４の機械的
な寸法精度をだしておき、ノズル板１１を接着剤
１３１で接着面１３に接着し、さらに間隔調整板
２３をインク層３１の部分に配置してノズル板１
２を接着剤１４１で接着面１４に接着する。この
時、ノズル板１２は、接着面１４に塗布される接
着剤１４１の厚みを調整することにより、間隔調
整板２３を介して、ノズル板１１と結合される。
すなわち、接着面１３と接着面１４の寸法のバラ
ツキおよび接着面１３に塗布される接着剤１３１
の厚みのバラツキが、接着面１４に塗布される接
着剤１４１の厚みにより補正される。 The present invention will be explained in detail below based on the drawings. FIG. 8 shows an embodiment in which the present invention is applied to the ink jet head of FIG. As shown in the figure, the nozzle plate 11 and the nozzle plate 12 are connected via a gap adjustment plate 23, and the ink layer 31
The thickness T I is equal to the thickness of the interval adjustment plate 23, and the dimensional accuracy of the thickness T I can be greatly improved. The method of assembling this ink jet head is to ensure the mechanical dimensional accuracy of the adhesive surfaces 13 and 14 in advance, adhere the nozzle plate 11 to the adhesive surface 13 with adhesive 131, and then attach the spacing adjustment plate 23 to the ink jet head. The nozzle plate 1 is placed on the layer 31.
2 is adhered to the adhesive surface 14 with an adhesive 141. At this time, the nozzle plate 12 is coupled to the nozzle plate 11 via the interval adjustment plate 23 by adjusting the thickness of the adhesive 141 applied to the adhesive surface 14.
That is, variations in the dimensions of the adhesive surface 13 and the adhesive surface 14 and the adhesive 131 applied to the adhesive surface 13
The variation in thickness is corrected by the thickness of the adhesive 141 applied to the adhesive surface 14.

間隔調整板２３は、間隔調整部がインク吐出口
５あるいは結合通路４より放射状に配置されるよ
うな形状をなしている。このような形状の間隔調
整板を使用すれば、インク供給がインク供給溝よ
りあらゆる方向性をもつて行なわれるため、イン
ク供給の円滑性を損うことなく、かつインク供給
不足が生じることがない。 The interval adjustment plate 23 has a shape such that the interval adjustment portions are arranged radially from the ink discharge ports 5 or the coupling passages 4. By using a spacing adjustment plate with this shape, ink can be supplied in all directions from the ink supply groove, so the smoothness of ink supply will not be impaired and there will be no shortage of ink supply. .

さらに詳細に述べると、インク供給の方向性を
均一にするためには、間隔調整部がインク吐出口
５あるいは結合通路４より均等な角度で配置され
るのが理想的であり、他の場合が許されるのは、
インク供給の円滑性が損なわれない範囲に限る。
また間隔調整部の面積は、インク供給量の不足が
生じない範囲の大きさでなければならない。なお
第８図および第９図では、間隔調整部が４つの小
片に分割されているが、前記のインク供給の円滑
性及びインク供給量の許す範囲内で、間隔調整部
の面積及び、分割される小片の個数を変更するこ
とができる。 More specifically, in order to make the directionality of ink supply uniform, it is ideal that the interval adjustment parts are arranged at equal angles from the ink discharge ports 5 or the coupling passages 4; What is allowed is
Limited to a range that does not impair the smoothness of ink supply.
Furthermore, the area of the interval adjustment section must be within a range that does not cause a shortage of ink supply. In FIGS. 8 and 9, the space adjustment section is divided into four small pieces, but the area of the space adjustment section and the size of the space adjustment section may be adjusted within the range permitted by the smoothness of ink supply and the amount of ink supply. You can change the number of pieces.

このように、間隔調整部がインク吐出口５ある
いは結合通路４より放射状に配置されるべく形状
をなしている間隔調整板を使用することにより、
インク供給の円滑性を損うことなくインク層３１
の厚みＴIの寸法精度を向上させることができ
る。 In this way, by using the spacing adjustment plate shaped so that the spacing adjustment portion is arranged radially from the ink discharge port 5 or the coupling passage 4,
Ink layer 31 without impairing the smoothness of ink supply
The dimensional accuracy of the thickness T I can be improved.

以上、間隔調整板２３を外方の室３内に設定す
ることによつて、インク層３１の厚みＴIの寸法
精度を向上させる場合について述べたが、次には
第１０図、第１１図をもとに、間隔調整板２４を
空気室７に用いた実施例について説明する。空気
室７は、溝の部分と層の部分よりなるという外方
の室３とほぼ同一の形状をなしているため、空気
層７１の厚みＴAの寸法精度の向上に関して、イ
ンク層３１の厚みＴIの場合と全く同様な構成を
採用できる。したがつて、厚みＴAの寸法精度の
向上に関する限り、外方の室３に関するものと同
様なものとなるので、詳細な説明は省略する。 The case where the dimensional accuracy of the thickness T I of the ink layer 31 is improved by setting the interval adjustment plate 23 in the outer chamber 3 has been described above. An example in which the interval adjustment plate 24 is used in the air chamber 7 will be described based on the following. Since the air chamber 7 has almost the same shape as the outer chamber 3, consisting of a groove portion and a layer portion, the thickness of the ink layer 31 is Exactly the same configuration as in the case of T I can be adopted. Therefore, as far as improving the dimensional accuracy of the thickness T A is concerned, it is the same as that regarding the outer chamber 3, and detailed explanation will be omitted.

以上詳細な説明により明らかなように、外方の
室に間隔調整板を設置することにより、インク層
の厚みの寸法精度を大幅に向上させることがで
き、閾値電圧やインク供給の円滑性等のヘツド性
能が安定化し、互換性や製造工程での歩留りを改
善することができる。また更に、空気室に間隔調
整板を設置することにより、空気層の厚みの寸法
精度を大幅に向上させることができ、階調性やイ
ンク吐出口での圧力バランス条件等のヘツド性能
が安定化し、互換性や製造工程での歩留りを改善
することができる。 As is clear from the detailed explanation above, by installing the spacing adjustment plate in the outer chamber, the dimensional accuracy of the ink layer thickness can be greatly improved, and the threshold voltage, smoothness of ink supply, etc. Head performance is stabilized, and compatibility and yield in the manufacturing process can be improved. Furthermore, by installing a spacing adjustment plate in the air chamber, the dimensional accuracy of the thickness of the air layer can be greatly improved, and head performance such as gradation and pressure balance conditions at the ink ejection port are stabilized. , compatibility and yield in the manufacturing process can be improved.

なお本発明は、前記外方の室あるいは、空気室
と同様の形状を有している他の構成のインクジエ
ツトヘツドにも適用でき、たとえば特開昭48−
9622号公報の第１１図、第１２図に示されたよう
な複数個のインク吐出口を有するインクジエツト
ヘツドについても本発明を適用でき、各ノズル間
の性能のバラツキを少なくすることができる。 The present invention can also be applied to ink jet heads having other configurations having the same shape as the outer chamber or the air chamber;
The present invention can also be applied to an ink jet head having a plurality of ink ejection ports as shown in FIGS. 11 and 12 of Japanese Patent No. 9622, and it is possible to reduce variations in performance between each nozzle.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図はインクジエツトヘツドの断
面図、第３図及び第４図はインクジエツトヘツド
の部分拡大断面図、第５図は第２図のインクジエ
ツトヘツドを用いたインクジエツト記録装置の断
面図、第６図及び第７図はその特性図、第８図は
本発明の一実施例の要部断面図、第９図は同平面
図、第１０図は本発明の一実施例の断面図、第１
１図は同平面図である。 １……圧力上昇装置、２……内方の室、３……
外方の室、４……結合通路、５……インク吐出
口、６……インク流入路、７……空気室、８……
空気吐出口、９……空気流入路、１０……ボデイ
部分、１１……ノズル板、１２……ノズル板、１
５……ノズル板、１７……電気信号、１８……イ
ンク溜、１９……空気供給源、２３，２４……間
隔調整板。 1 and 2 are sectional views of an ink jet head, FIGS. 3 and 4 are partially enlarged sectional views of an ink jet head, and FIG. 5 is an ink jet recording apparatus using the ink jet head of FIG. 2. 6 and 7 are its characteristic diagrams, FIG. 8 is a sectional view of a main part of an embodiment of the present invention, FIG. 9 is a plan view thereof, and FIG. 10 is a diagram of an embodiment of the present invention. Cross section, 1st
Figure 1 is a plan view of the same. 1... Pressure increase device, 2... Inner chamber, 3...
Outer chamber, 4... Connection passage, 5... Ink discharge port, 6... Ink inflow path, 7... Air chamber, 8...
Air discharge port, 9... Air inflow path, 10... Body part, 11... Nozzle plate, 12... Nozzle plate, 1
5... Nozzle plate, 17... Electric signal, 18... Ink reservoir, 19... Air supply source, 23, 24... Interval adjustment plate.

Claims (1)

【特許請求の範囲】 １ ノズルが穿孔された第１の平板と、第１の平
板より面積が小さく、ノズルが穿孔された第２の
平板とを有し、第１および第２の平板をノズルが
一直線上にあるように所定の厚みを有する間隔調
整板を密着挾撃して対向させ、前記２枚の平板が
間隔調整板を介さずに対向して形成される間隙を
前記ノズルに連通する第１のインク室とし、前記
第２の平板の外周部に隣接してボデイ部材に設け
られた溝と前記第１の平板により構成される空間
を第１のインク室およびインク供給源に連通する
第２のインク室とし、前記間隔調整板が第２のイ
ンク室の外周全周に隣接する外殻部と、ノズルよ
り第２のインク室に向つて放射状に配置され先端
が前記外殻部に接続した間隔調整部とから成るこ
とを特徴とするインクジエツトヘツド。 ２ 空気吐出口が穿孔された第１の平板と、第１
の平板より面積が小さく、インク吐出口が穿孔さ
れた第２の平板とを有し、第１および第２の平板
をノズルが一直線上にあるように所定の厚みを有
する間隔調整板を密着挾撃して対向させ、前記２
枚の平板が間隔調整板を介さずに対向して形成さ
れる間隙を前記空気吐出口およびインク吐出口に
連通する第１の空気室とし、前記第２の平板の外
周部に隣接してボデイ部材に設けられた溝と前記
第１の平板により構成される空間を第１の空気室
および空気供給源に連通する第２の空気室とし、
前記間隔調整板が第２の空気室の外周全周に隣接
する外殻部と、空気吐出口より第２の空気室に向
つて放射状に配置され先端が前記外殻部に接続し
た間隔調整部とから成ることを特徴とするインク
ジエツトヘツド。[Scope of Claims] 1. A first flat plate having a nozzle perforated therein and a second flat plate having a smaller area than the first flat plate and having a nozzle perforated therein; Interval adjusting plates having a predetermined thickness are tightly clamped to face each other so as to be in a straight line, and the gap formed by the two flat plates facing each other without intervening the interval adjusting plate is communicated with the nozzle. A space formed by a groove provided in the body member adjacent to the outer periphery of the second flat plate and the first flat plate is communicated with the first ink chamber and an ink supply source. A second ink chamber is provided, and the interval adjusting plate is arranged between an outer shell portion adjacent to the entire outer periphery of the second ink chamber, and a distal end thereof is arranged radially from the nozzle toward the second ink chamber, and the tip thereof is arranged radially from the nozzle toward the second ink chamber. An inkjet head characterized in that it consists of a connected spacing adjustment section. 2. A first flat plate having air discharge ports perforated therein;
a second flat plate having a smaller area than the flat plate and having ink ejection ports perforated therein, and a spacing adjusting plate having a predetermined thickness is tightly sandwiched between the first and second flat plates so that the nozzles are aligned in a straight line. Shoot them and make them face each other, and
A gap formed by two flat plates facing each other without a gap adjustment plate is defined as a first air chamber communicating with the air discharge port and the ink discharge port, and a body is provided adjacent to the outer peripheral portion of the second flat plate. A space formed by the groove provided in the member and the first flat plate is a second air chamber communicating with the first air chamber and the air supply source,
an outer shell portion in which the spacing adjustment plate is adjacent to the entire outer circumference of the second air chamber; and a spacing adjustment portion that is arranged radially from the air discharge port toward the second air chamber and has a tip connected to the outer shell portion. An inkjet head comprising:
JP14461879A 1979-11-07 1979-11-07 Ink jet head Granted JPS5667272A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP14461879A JPS5667272A (en) 1979-11-07 1979-11-07 Ink jet head
GB8035504A GB2061831B (en) 1979-11-07 1980-11-05 Ink jet writing head with spacer in capillary chamber
US06/204,713 US4358781A (en) 1979-11-07 1980-11-06 Ink jet writing head with spacer in capillary chamber
DE19803041925 DE3041925A1 (en) 1979-11-07 1980-11-06 INK-JET PRINT HEAD
FR8023789A FR2469285A1 (en) 1979-11-07 1980-11-07 INK JET WRITING HEAD WITH SPACER IN CAPILLARITY TANK

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14461879A JPS5667272A (en) 1979-11-07 1979-11-07 Ink jet head

Publications (2)

Publication Number Publication Date
JPS5667272A JPS5667272A (en) 1981-06-06
JPS6236871B2 true JPS6236871B2 (en) 1987-08-10

Family

ID=15366215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14461879A Granted JPS5667272A (en) 1979-11-07 1979-11-07 Ink jet head

Country Status (1)

Country Link
JP (1) JPS5667272A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146859A (en) * 1983-02-10 1984-08-22 Matsushita Electric Ind Co Ltd Ink jet recording apparatus

Also Published As

Publication number Publication date
JPS5667272A (en) 1981-06-06

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