JPH08156252A - Ink jet head - Google Patents

Ink jet head

Info

Publication number
JPH08156252A
JPH08156252A JP29980794A JP29980794A JPH08156252A JP H08156252 A JPH08156252 A JP H08156252A JP 29980794 A JP29980794 A JP 29980794A JP 29980794 A JP29980794 A JP 29980794A JP H08156252 A JPH08156252 A JP H08156252A
Authority
JP
Japan
Prior art keywords
piezoelectric element
electrode surface
flexible printed
terminal portion
adhesive
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.)
Granted
Application number
JP29980794A
Other languages
Japanese (ja)
Other versions
JP3134690B2 (en
Inventor
Yoshikatsu Tsuchibuchi
義勝 土渕
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.)
Seikosha KK
Original Assignee
Seikosha KK
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 Seikosha KK filed Critical Seikosha KK
Priority to JP29980794A priority Critical patent/JP3134690B2/en
Publication of JPH08156252A publication Critical patent/JPH08156252A/en
Application granted granted Critical
Publication of JP3134690B2 publication Critical patent/JP3134690B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/321Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/36Assembling printed circuits with other printed circuits
    • H05K3/361Assembling flexible printed circuits with other printed circuits

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

PURPOSE: To enhance the bonding strength of a flexible printed cable and a piezoelectric element and to prevent a short circuit. CONSTITUTION: A piezoelectric element 6 is bonded to the upper surface of a nozzle plate 3 through a vibration plate 5 in opposed relation to a pressure chamber part 4b. A notch part 10a having an area larger than that of the electrode surface 6a of the piezoelectric element 6 is provided to the coverlay 10 of a flexible printed cable 7 at the position to be opposed to the piezoelectric element 6. The terminal part 9a being a part of a conductive pattern is positioned in the notch part and formed so as to have an area smaller than that of the electrode surface 6a. When a conductive adhesive 11 is dripped on the electrode surface 6a to press the notch part to the electrode surface, the electrode surface 6a and the terminal part 9a are brought to a direct contact state within the notch part and bonded in such a state that the periphery thereof is surrounded by the adhesive. By this constitution, conductive efficiency is enhanced and the use amt. of the adhesive can be reduced and, since the adhesive is prevented form flowing to the surface of the coverlay, the cause of a short circuit is removed.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、インクジェットヘッド
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet head.

【0002】[0002]

【従来の技術】インクジェットヘッドの一つの形式とし
て、円板状のノズルプレートの背面側に多数のインク流
路を放射状に配設し、その中心部近傍に設けられたノズ
ルから前面にインク滴を射出させるようにしたものがあ
る。
2. Description of the Related Art As one type of ink jet head, a large number of ink flow paths are radially arranged on the back side of a disk-shaped nozzle plate, and ink drops are ejected from the nozzles provided near the center of the ink flow path to the front side. Some have been designed to eject.

【0003】図5は、従来技術における構成を示すもの
で、1対の基板22,23の間に溝状のインク流路部が
設けられその一部が加圧室24bとなっている。基板2
3上面の加圧室24bの対向位置には、共通電極を兼ね
る振動板25を介して圧電素子26が貼付してある。
FIG. 5 shows a structure in the prior art, in which a groove-shaped ink flow path portion is provided between a pair of substrates 22 and 23, and a part of the ink flow path portion serves as a pressurizing chamber 24b. Substrate 2
A piezoelectric element 26 is attached to a position facing the pressure chamber 24b on the upper surface of the plate 3 via a vibration plate 25 that also serves as a common electrode.

【0004】圧電素子に電力を供給するためのフレキシ
ブルプリントケーブル27は、ベースフィルム28の一
面に導電パターン29を形成し、その上に絶縁性のカバ
ーレイ30で覆ってある。導電パターン29の一部には
端子部29aが形成してあり、カバーレイ30には切欠
部30aが設けられ、端子部29aは切欠部30aを介
して露出している。
The flexible printed cable 27 for supplying electric power to the piezoelectric element has a conductive pattern 29 formed on one surface of the base film 28 and is covered with an insulating cover lay 30 thereon. A terminal portion 29a is formed in a part of the conductive pattern 29, a cutout portion 30a is provided in the coverlay 30, and the terminal portion 29a is exposed through the cutout portion 30a.

【0005】圧電素子の電極面26aに導電性接着剤3
1を滴下し、その上にフレキシブルプリントケーブルの
切欠部30aを押し付けると、図6に示すように、圧電
素子の電極面は切欠部30aの周囲のカバーレイ30の
対向面と当接して切欠部内に電極面と端子部29aとの
間に空間が形成される。このとき導電性接着剤31は上
下方向から押圧されて空間内で展延され、電極面26a
と端子部29aとを接合することによってフレキシブル
プリントケーブル27と圧電素子26とを接続してい
る。
A conductive adhesive 3 is applied to the electrode surface 26a of the piezoelectric element.
When 1 is dropped and the notch 30a of the flexible printed cable is pressed onto it, as shown in FIG. 6, the electrode surface of the piezoelectric element comes into contact with the facing surface of the coverlay 30 around the notch 30a and inside the notch. A space is formed between the electrode surface and the terminal portion 29a. At this time, the conductive adhesive 31 is pressed from the vertical direction and spread in the space, and the electrode surface 26a
The flexible printed cable 27 and the piezoelectric element 26 are connected to each other by joining the flexible printed cable 27 and the terminal portion 29a.

【0006】[0006]

【発明が解決しようとする課題】上記したように従来技
術においては、圧電素子26とフレキシブルプリントケ
ーブル27とを接続する際、切欠部30aの周囲のカバ
ーレイ30が圧電素子26の前面に当接してしまうた
め、電極面26aが端子部29aまで届かず、空間内で
展延された導電性接着剤31を介して両者が接合されて
いる。このため接合強度を高くするためには、カバーレ
イの厚み分に相当する空間を充当するだけの接着材を必
要とされ、接着剤の消費量が多くなっている問題があ
る。また、反対に接着剤の使用料を多くし過ぎすぎる
と、接着剤が切欠部の周囲に流れ出して、特に高密度ヘ
ッドの場合、隣接の導電パターンや圧電素子とショート
を起こす原因になっていた。
As described above, in the prior art, when connecting the piezoelectric element 26 and the flexible printed cable 27, the cover lay 30 around the notch 30a abuts on the front surface of the piezoelectric element 26. Therefore, the electrode surface 26a does not reach the terminal portion 29a, and the two are joined via the conductive adhesive 31 spread in the space. Therefore, in order to increase the bonding strength, it is necessary to use an adhesive material that fills a space corresponding to the thickness of the cover lay, and there is a problem that the consumption amount of the adhesive agent is large. On the other hand, if the amount of the adhesive used is too large, the adhesive will flow out around the notch, causing a short circuit with the adjacent conductive pattern or piezoelectric element especially in the case of a high density head. .

【0007】そこで本発明の目的は、インクジェットヘ
ッドにおける導電パターンの端子部と切欠部との形状を
改善して、フレキシブルプリントケーブルと圧電素子と
の接合強度を大きくし、かつショートを起こさないよう
にすることにある。
Therefore, an object of the present invention is to improve the shape of the terminal portion and the notch portion of the conductive pattern in the ink jet head so as to increase the bonding strength between the flexible printed cable and the piezoelectric element and prevent a short circuit. To do.

【0008】[0008]

【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、積層される1対の基板間に区画形成さ
れる複数の溝状のインク流路部と、これらの各インク流
路部の中間位置に設けてある加圧室部と、各インク流路
部の先端部に設けてあるノズルと、一方の基板に各加圧
室部とそれぞれ対向するように配設してある圧電素子
と、各圧電素子に電力を供給するフレキシブルプリント
ケーブルとを備えたインクジェットヘッドにおいて、フ
レキシブルプリントケーブルは、絶縁性のベースフィル
ムと、このベースフィルム上に設けられた導電パターン
と、この導電パターンの一部に設けられ圧電素子の電極
面と接触して導通可能な端子部と、導電パターンを覆う
ようにベースフィルムに積層される絶縁性のカバーレイ
と、このカバーレイに穿設された端子部を露出させる切
欠部とを有し、これらの切欠部は、圧電素子の電極面よ
りも大面積で電極面を囲むように形成してあることを特
徴とする。
In order to achieve the above-mentioned object, the present invention provides a plurality of groove-shaped ink flow path portions defined between a pair of substrates to be laminated, and each of these inks. A pressurizing chamber portion provided at an intermediate position of the flow passage portion, a nozzle provided at a tip end portion of each ink flow passage portion, and one substrate are provided so as to face each pressurizing chamber portion. In an inkjet head including a certain piezoelectric element and a flexible printed cable that supplies electric power to each piezoelectric element, the flexible printed cable includes an insulating base film, a conductive pattern provided on the base film, and the conductive pattern. A terminal portion which is provided in a part of the pattern and can be brought into contact with the electrode surface of the piezoelectric element to conduct electricity, an insulating coverlay which is laminated on the base film so as to cover the conductive pattern, and the coverlay. And a notch for exposing the terminal portion is bored, these notches, characterized in that is formed to surround the electrode surface in an area larger than the electrode surface of the piezoelectric element.

【0009】上記手段において、フレキシブルプリント
ケーブルの端子部は、圧電素子の上記電極面よりも小面
積に形成するとよい。
In the above means, the terminal portion of the flexible printed cable may be formed in a smaller area than the electrode surface of the piezoelectric element.

【0010】[0010]

【作用】本発明は、フレキシブルプリントケーブルを露
出させる切欠部を圧電素子の電極面よりも大面積とし、
かつこの電極面を囲むように形成してあるので、電極面
と導電パターンの端子部とが直接的に当接可能になる。
このため端子部と電極面とを接合するための導電性接着
剤が少量ですむため、これが切欠部内に滞留してカバー
レイの表面へ流出することが防止される。
According to the present invention, the notch for exposing the flexible printed cable has a larger area than the electrode surface of the piezoelectric element,
Moreover, since it is formed so as to surround this electrode surface, the electrode surface and the terminal portion of the conductive pattern can directly come into contact with each other.
Therefore, a small amount of the conductive adhesive for joining the terminal portion and the electrode surface is required, so that the conductive adhesive is prevented from staying in the cutout portion and flowing out to the surface of the coverlay.

【0011】導電パターンの端子部を圧電素子の電極面
よりも小面積にすれば、それだけ導電性接着剤の切欠部
内における接合面積を大きくできる。
If the terminal portion of the conductive pattern has a smaller area than the electrode surface of the piezoelectric element, the bonding area of the conductive adhesive in the notch can be increased accordingly.

【0012】[0012]

【実施例】以下本発明の一実施例について図面を参照し
て説明する。初めに図3,4を用いて本発明に係るイン
クジェットヘッドの全体の構成について説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the overall configuration of the inkjet head according to the present invention will be described with reference to FIGS.

【0013】インクジェットヘッドのボディBは、イン
クプール基板1とその前面(図3上面)の1対の基板
(中板2及びノズルプレート3)とによって構成してあ
る。1対の基板2,3間には溝状のインク流路部4が区
画形成してある。
The body B of the ink jet head is composed of an ink pool substrate 1 and a pair of substrates (middle plate 2 and nozzle plate 3) on the front surface (the upper surface of FIG. 3). A groove-shaped ink flow path portion 4 is defined between the pair of substrates 2 and 3.

【0014】ボディBを構成する3枚の基板1〜3は、
いずれもインクに対して化学的に強くかつ接着剤による
接合可能な物質としてPSF(ポリサルフォン)等の材
料を採用し、これを射出成形することによって作られて
いる。
The three substrates 1 to 3 constituting the body B are
In each case, a material such as PSF (polysulfone) is adopted as a substance that is chemically strong with respect to the ink and can be bonded with an adhesive, and is made by injection molding.

【0015】インクプール基板1の背面中央部に設けら
れた突起1aの中心部には、インク流入口1bが設けて
あり、前面側には共通インク室部1cが形成してある。
インク流入口1bには、インク中に混入した異物を遮断
するためのフィルタ1dが設けてある。中板2はインク
プール基板1と同一寸法に形成してあり、インクプール
室の内周部に沿って前面側を細くしたテーパ状の孔及び
この孔の先端部をインク流路部4の溝幅に対応した細径
に絞ってあるリストリクション2a…が複数個設けてあ
る。
An ink inlet 1b is provided at the center of the protrusion 1a provided at the center of the back surface of the ink pool substrate 1, and a common ink chamber portion 1c is formed at the front surface side.
The ink inlet port 1b is provided with a filter 1d for blocking foreign substances mixed in the ink. The middle plate 2 is formed to have the same size as the ink pool substrate 1, and has a tapered hole having a thin front surface along the inner peripheral portion of the ink pool chamber and the tip of this hole is a groove of the ink flow path portion 4. A plurality of restrictions 2a ... Which are narrowed to a small diameter corresponding to the width are provided.

【0016】ノズルプレート3の背面側(図4下面)に
は、複数のインク流路用溝部3a…が実質的に放射状に
形成してあり、中央部近傍で2列に並設された各先端部
には、板厚方向に形成された孔からなるノズル3b…が
設けてある。ノズルプレート3の前面中央部は、ほぼ長
方形状に突出した突起部3cが形成してある。各ノズル
3bの先端はこの突起部3cの前面近くで絞られて、イ
ンク滴を射出可能にしてある。各インク流路用溝部3a
…は、中板2とノズルプレート3とからなる1対の基板
2,3が接合することにより前出のインク流路部4が区
画形成され、これらのインク流路部はリストリクション
2aによって共通インク室部1cと連通している。イン
ク流路部4のリストリクション2a寄りの中間位置に
は、溝幅を広くした加圧室部4aが設けてある。
On the back side of the nozzle plate 3 (the lower surface in FIG. 4), a plurality of ink channel grooves 3a ... Are formed substantially radially, and the tips are juxtaposed in two rows near the center. Nozzles 3b, which are holes formed in the plate thickness direction, are provided in the portion. The central portion of the front surface of the nozzle plate 3 is formed with a protruding portion 3c protruding substantially in a rectangular shape. The tip of each nozzle 3b is squeezed in the vicinity of the front surface of the protrusion 3c so that ink droplets can be ejected. Each ink channel groove 3a
The ink flow path section 4 described above is defined by joining a pair of substrates 2 and 3 including the intermediate plate 2 and the nozzle plate 3, and these ink flow path sections are defined by the restriction 2a. It communicates with the common ink chamber portion 1c. A pressurizing chamber portion 4a having a wide groove width is provided at an intermediate position of the ink flow passage portion 4 near the restriction 2a.

【0017】ノズルプレート3の前面側かつ各加圧室部
4aとの対向位置には長方形の振動板5…が貼り付けて
ある。振動板5は圧電素子による振動を増幅するととも
に、共通電極を兼ねるものであるので、導電性の高い材
料であるりん青銅や黄銅などの薄板を用いてある。
A rectangular vibrating plate 5 is attached to the front side of the nozzle plate 3 and at a position facing the pressure chambers 4a. The vibrating plate 5 amplifies the vibration due to the piezoelectric element and also serves as a common electrode. Therefore, a thin plate such as phosphor bronze or brass, which is a highly conductive material, is used.

【0018】各振動板5の前面かつ加圧室部4aの対向
位置には、圧電素子6が導電性接着剤によってそれぞれ
振動板5と導通可能に貼付してある。各圧電素子6…の
両面は導電膜を形成してなる電極面となっており、その
うち前面側の電極面6aには、フレキシブルプリントケ
ーブル7の背面が当接され接合されている。
A piezoelectric element 6 is attached to the front surface of each diaphragm 5 and a position facing the pressurizing chamber 4a so as to be electrically conductive with the diaphragm 5 by a conductive adhesive. Both surfaces of each piezoelectric element 6 are electrode surfaces formed with conductive films, of which the back surface of the flexible printed cable 7 is abutted and joined to the electrode surface 6a on the front surface side.

【0019】フレキシブルプリントケーブル7は、図示
しないプリンタ本体のプリント基板に帯状部7aを介し
て接続してあり、円形部7bでインクジェットヘッドの
ボディBの前面を覆っている。円形部7bの中央部は略
長方形に切り抜かれており、この切り抜かれた部分から
ノズルプレート3の中央部前面に形成された突起部3c
の前面を露出させ、ノズルからのインク滴の射出に支障
を生じないようにしてある。
The flexible printed cable 7 is connected to a printed circuit board of a printer body (not shown) via a strip portion 7a, and a circular portion 7b covers the front surface of a body B of the ink jet head. The central portion of the circular portion 7b is cut out in a substantially rectangular shape, and the protruding portion 3c formed on the front surface of the central portion of the nozzle plate 3 from the cutout portion.
The front surface of the is exposed so that the ejection of ink droplets from the nozzle is not hindered.

【0020】図1に示すように、フレキシブルプリント
ケーブル7は、可撓性の絶縁性樹脂板からなるベースフ
ィルム8の背面側に導電パターン9が印刷してあり、そ
の上を絶縁材からなるカバーレイ10によって覆ってあ
る。カバーレイ10には、フレキシブルプリントケーブ
ル7をインクジェットヘッドのボディBの前面に取り付
けた状態で、各圧電素子6と対向すべき位置に切欠部1
0aが穿設してある。各切欠部10aの面積は圧電素子
の電極面6aよりも大面積に形成してある。
As shown in FIG. 1, in the flexible printed cable 7, a conductive pattern 9 is printed on the back side of a base film 8 made of a flexible insulating resin plate, and a cover made of an insulating material is formed on the conductive pattern 9. It is covered by Ray 10. In the coverlay 10, with the flexible print cable 7 attached to the front surface of the body B of the inkjet head, the notch 1 is provided at a position that should face each piezoelectric element 6.
0a is drilled. The area of each notch 10a is larger than that of the electrode surface 6a of the piezoelectric element.

【0021】切欠部10aの中央部には、導電パターン
9の一部に設けられた端子部9aが設けてある。端子部
9aは銅電極からなり、圧電素子7の電極面よりも小面
積に形成してあり、切欠部の穿設によって露出してい
る。
A terminal portion 9a provided in a part of the conductive pattern 9 is provided at the center of the cutout portion 10a. The terminal portion 9a is made of a copper electrode, is formed in a smaller area than the electrode surface of the piezoelectric element 7, and is exposed by forming a cutout portion.

【0022】図1に示すように、インクジェットヘッド
のボディBへのフレキシブルプリントケーブル7の接合
は、圧電素子の電極面6aに導電性接着剤11を適量だ
け滴下し、フレキシブルプリントケーブル7を下降さ
せ、端子部9aを導電性接着剤11の上面中央部に当接
して押圧することによって行われる。
As shown in FIG. 1, the flexible printed cable 7 is joined to the body B of the ink jet head by dropping an appropriate amount of the conductive adhesive 11 on the electrode surface 6a of the piezoelectric element and lowering the flexible printed cable 7. , The terminal portion 9a is brought into contact with and pressed against the central portion of the upper surface of the conductive adhesive 11.

【0023】図2は、端子部9aと圧電素子の電極面6
aとを接合した状態を示すもので、導電性接着剤11
は、フレキシブルプリントケーブル7を押し付けた時の
押圧力によって展延され、端子部9aと圧電素子の電極
面6aとの間から排除され、圧電素子の周囲に薄く分布
している。このため、端子部9aと圧電素子の電極面6
aとは直接的に当接し、導電性接着剤11は端子部の周
囲でベースフィルム8の対向面と圧電素子の電極面6a
とを接合した状態となる。この結果、電極パターンの端
子部9aと圧電素子の電極面6aとの間の接合は直接接
触となるので、電導効率が高くなる。
FIG. 2 shows the terminal portion 9a and the electrode surface 6 of the piezoelectric element.
It shows a state in which a and a are joined, and the conductive adhesive 11
Is spread by the pressing force when the flexible printed cable 7 is pressed, is removed from between the terminal portion 9a and the electrode surface 6a of the piezoelectric element, and is distributed thinly around the piezoelectric element. Therefore, the terminal portion 9a and the electrode surface 6 of the piezoelectric element are
a is in direct contact with the conductive adhesive 11 and the conductive adhesive 11 surrounds the terminal portion and the opposing surface of the base film 8 and the electrode surface 6a of the piezoelectric element.
It becomes a state where and are joined. As a result, the contact between the terminal portion 9a of the electrode pattern and the electrode surface 6a of the piezoelectric element is a direct contact, so that the conduction efficiency is increased.

【0024】また、導電性接着剤を切欠部と圧電素子の
電極部との間に形成されるスペース全体に充填する必要
がないので、接着剤の消費量を少なくできる利点があ
る。そのため、展延された導電性接着剤11がカバーレ
イの切欠部10a内部に収納可能であり、カバーレイの
表面に流れ出して隣接する圧電素子や導電パターンと接
触することがなくなり、ショートを起す原因が除去され
る。
Further, since it is not necessary to fill the entire space formed between the cutout portion and the electrode portion of the piezoelectric element with the conductive adhesive, there is an advantage that the consumption amount of the adhesive can be reduced. Therefore, the spread conductive adhesive 11 can be stored inside the notch 10a of the cover lay, and it will not flow out to the surface of the cover lay and contact the adjacent piezoelectric element or conductive pattern, which causes a short circuit. Are removed.

【0025】導電性接着剤は、合成樹脂に対しては接着
力が強く銅に対しては比較的接着力が弱いため、端子部
を小面積にすると樹脂製のカバーレイ10との接合面が
大きくなるので接合強度が高くなる。
Since the conductive adhesive has a strong adhesive force with respect to synthetic resin and a relatively weak adhesive force with respect to copper, when the terminal area is made small, the joint surface with the resin cover lay 10 becomes small. As the size increases, the bonding strength increases.

【0026】なお、本実施例ではインク流路用溝部をノ
ズルプレートに設けるようにしてあるが、これらのイン
ク流路用溝部は中板に設けるようにしてもよい。また、
接着剤を圧電素子側に滴下するようにしてあるが、これ
も端子部側に付着させるようにしてもよい。なお、振動
板や基板の材質については上記したものに拘束されず、
適宜有効なものを選択して採用可能である。
In this embodiment, the ink passage groove portions are provided in the nozzle plate, but these ink passage groove portions may be provided in the intermediate plate. Also,
Although the adhesive is dropped onto the piezoelectric element side, it may also be attached onto the terminal portion side. In addition, the material of the diaphragm and the substrate is not restricted to the above,
It is possible to select and employ an effective one as appropriate.

【0027】[0027]

【発明の効果】本発明は、フレキシブルプリントケーブ
ルのカバーレイに端子部を露出させるために設ける切欠
部を、圧電素子の電極面よりも大面積とし、かつこの電
極面の周囲を囲むように形成してあるので、接合時に端
子部と圧電素子の電極面とが直接的に接触する状態とな
り導電効率が向上する。また、導電性接着剤は端子部を
囲むように分布するため、使用量が少なくても強固に接
合されるのでコスト上有利となる。また、導電性接着剤
が切欠部からカバーレイの表面に流れ出すおそれがなく
なるので、隣接する圧電素子などに対してショートする
恐れがなくなる。
According to the present invention, the notch provided in the coverlay of the flexible printed cable for exposing the terminal portion is formed so as to have a larger area than the electrode surface of the piezoelectric element and surround the electrode surface. Therefore, the terminal portion and the electrode surface of the piezoelectric element are in direct contact with each other at the time of joining, and the conductivity efficiency is improved. Further, since the conductive adhesive is distributed so as to surround the terminal portion, it can be firmly bonded even if the amount used is small, which is advantageous in cost. Further, since there is no possibility that the conductive adhesive will flow out from the cutout portion to the surface of the coverlay, there is no risk of short-circuiting with the adjacent piezoelectric element or the like.

【0028】さらに、端子部を圧電素子の電極面よりも
小面積に形成すれば、導電性接着剤により接合される面
積が大きくなるので接合強度をより高くすることができ
る等の効果がある。
Further, if the terminal portion is formed in a smaller area than the electrode surface of the piezoelectric element, the area to be joined by the conductive adhesive becomes large, so that the joining strength can be further increased.

【図面の簡単な説明】[Brief description of drawings]

【図1】本実施例における基板の上面にフレキシブルプ
リントケーブルを被せる前の状態を示す断面図である。
FIG. 1 is a cross-sectional view showing a state before a flexible printed cable is covered on the upper surface of a substrate in this embodiment.

【図2】本実施例における基板の上面にフレキシブルプ
リントケーブルを当接した状態を示す断面図である。
FIG. 2 is a cross-sectional view showing a state in which a flexible printed cable is in contact with the upper surface of a substrate in this embodiment.

【図3】本実施例におけるインクジェットヘッドの要部
の構成を示す一部切欠平面図である。
FIG. 3 is a partially cutaway plan view showing a configuration of a main part of an inkjet head in the present embodiment.

【図4】図3のA−A線断面図である4 is a sectional view taken along the line AA of FIG.

【図5】従来技術における基板の上面にフレキシブルプ
リントケーブルを被せる前の状態を示す断面図である。
FIG. 5 is a cross-sectional view showing a state before the flexible printed cable is covered on the upper surface of the substrate in the conventional technique.

【図6】従来技術における基板の上面にフレキシブルプ
リントケーブルを当接した状態を示す断面図である。
FIG. 6 is a cross-sectional view showing a state in which a flexible printed cable is in contact with the upper surface of a substrate according to a conventional technique.

【符号の説明】[Explanation of symbols]

2,3 1対の基板 3b ノズル 4 インク流路部 4b 加圧室部 6 圧電素子 6a 電極面 7 フレキシブルプリントケーブル 8 ベースフィルム 9 導電パターン 9a 端子部 10 カバーレイ 10a 切欠部 2,3 1 pair of substrates 3b Nozzle 4 Ink flow path portion 4b Pressurizing chamber portion 6 Piezoelectric element 6a Electrode surface 7 Flexible printed cable 8 Base film 9 Conductive pattern 9a Terminal portion 10 Coverlay 10a Cutout portion

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 積層される1対の基板間に区画形成され
る複数の溝状のインク流路部と、これらの各インク流路
部の中間位置に設けてある加圧室部と、上記各インク流
路部の先端部に設けてあるノズルと、一方の上記基板に
上記各加圧室部とそれぞれ対向するように配設してある
圧電素子と、上記各圧電素子に電力を供給するフレキシ
ブルプリントケーブルとを備えたインクジェットヘッド
において、 上記フレキシブルプリントケーブルは、絶縁性のベース
フィルムと、上記ベースフィルム上に設けられた導電パ
ターンと、上記導電パターンの一部に設けられ上記圧電
素子の電極面と接触して導通可能な端子部と、上記導電
パターンを覆うように上記ベースフィルムに積層される
絶縁性のカバーレイと、上記カバーレイに穿設され上記
端子部を露出させる切欠部とを有し、 上記切欠部は、上記圧電素子の上記電極面よりも大面積
で上記電極面を囲むように形成してあることを特徴とす
るインクジェットヘッド。
1. A plurality of groove-shaped ink flow path portions partitioned and formed between a pair of stacked substrates, a pressurizing chamber portion provided at an intermediate position between these ink flow path portions, and Nozzles provided at the tip of each ink flow path, piezoelectric elements provided on one of the substrates so as to face the pressure chambers, and power is supplied to the piezoelectric elements. In an inkjet head including a flexible printed cable, the flexible printed cable has an insulating base film, a conductive pattern provided on the base film, and an electrode of the piezoelectric element provided on a part of the conductive pattern. A terminal portion that is in contact with the surface and is conductive, an insulating cover lay that is laminated on the base film so as to cover the conductive pattern, and the terminal portion that is bored in the cover lay And a notch for exposed, the cutout, the ink jet head, characterized in that is formed to surround the electrode surface with a larger area than the electrode surface of the piezoelectric element.
【請求項2】 請求項1において、上記フレキシブルケ
ーブルの上記端子部は、上記圧電素子の上記電極面より
も小面積に形成してあることを特徴とするインクジェッ
トヘッド。
2. The ink jet head according to claim 1, wherein the terminal portion of the flexible cable is formed to have a smaller area than the electrode surface of the piezoelectric element.
JP29980794A 1994-12-02 1994-12-02 Inkjet head Expired - Fee Related JP3134690B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29980794A JP3134690B2 (en) 1994-12-02 1994-12-02 Inkjet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29980794A JP3134690B2 (en) 1994-12-02 1994-12-02 Inkjet head

Publications (2)

Publication Number Publication Date
JPH08156252A true JPH08156252A (en) 1996-06-18
JP3134690B2 JP3134690B2 (en) 2001-02-13

Family

ID=17877172

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29980794A Expired - Fee Related JP3134690B2 (en) 1994-12-02 1994-12-02 Inkjet head

Country Status (1)

Country Link
JP (1) JP3134690B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1403050A1 (en) 2002-09-24 2004-03-31 Brother Kogyo Kabushiki Kaisha Inkjet head and manufacturing method of the same
JP2009096050A (en) * 2007-10-16 2009-05-07 Brother Ind Ltd Liquid droplet jetting apparatus
US7871152B2 (en) 2007-06-27 2011-01-18 Brother Kogyo Kabushiki Kaisha Discharge head and method for producing discharge head
JP2017077667A (en) * 2015-10-20 2017-04-27 株式会社リコー Liquid discharge head, liquid discharge unit, and liquid discharging device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1403050A1 (en) 2002-09-24 2004-03-31 Brother Kogyo Kabushiki Kaisha Inkjet head and manufacturing method of the same
EP1632354A2 (en) 2002-09-24 2006-03-08 Brother Kogyo Kabushiki Kaisha Inkjet head and manufacturing method of the same
US7562428B2 (en) 2002-09-24 2009-07-21 Brother Kogyo Kabushiki Kaisha Manufacturing an ink jet head
US7766458B2 (en) 2002-09-24 2010-08-03 Brother Kogyo Kabushiki Kaisha Inkjet head capable of suppressing hindrance of deformation of a piezoelectric element
US7871152B2 (en) 2007-06-27 2011-01-18 Brother Kogyo Kabushiki Kaisha Discharge head and method for producing discharge head
JP2009096050A (en) * 2007-10-16 2009-05-07 Brother Ind Ltd Liquid droplet jetting apparatus
JP2017077667A (en) * 2015-10-20 2017-04-27 株式会社リコー Liquid discharge head, liquid discharge unit, and liquid discharging device

Also Published As

Publication number Publication date
JP3134690B2 (en) 2001-02-13

Similar Documents

Publication Publication Date Title
US7434914B2 (en) Inkjet recording head
US20030063449A1 (en) Structure of flexible printed circuit board
JPH068432A (en) Piezoelectric ink jet-system printing head and production thereof
US20020024567A1 (en) Piezoelectric ink-jet printer head and method of fabricating same
JP2003159795A (en) Recording apparatus
US5992976A (en) Ink-jet printhead
JP4124055B2 (en) Inkjet head and inkjet printer
US7311380B2 (en) Inkjet head
JP2003080793A (en) Recorder
JP3134690B2 (en) Inkjet head
EP0644051A1 (en) A flexible interconnect circuit for an ink jet print cartridge having a plurality of orifices
JP3094672B2 (en) Inkjet head
JPH09207331A (en) Ink jet recording head
JP3885696B2 (en) Inkjet head
JP2000263781A (en) Ink jet recorder
JPH09300633A (en) Ink-jet head
JP4253859B2 (en) Inkjet head
JP2000094677A (en) Piezoelectric oscillator unit and ink jet recording head
JP4622376B2 (en) Inkjet head
JP4320619B2 (en) Inkjet head manufacturing method
JP3991379B2 (en) Inkjet recording head
JPH07101051A (en) Ink jet head
JPH07304180A (en) Manufacture of ink jet head
JPH11105285A (en) Ink jet recording head
JPH06106724A (en) Ink-jet head

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20001031

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081201

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081201

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091201

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101201

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101201

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111201

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111201

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121201

Year of fee payment: 12

LAPS Cancellation because of no payment of annual fees