JPS6232112B2 - - Google Patents
Info
- Publication number
- JPS6232112B2 JPS6232112B2 JP53163627A JP16362778A JPS6232112B2 JP S6232112 B2 JPS6232112 B2 JP S6232112B2 JP 53163627 A JP53163627 A JP 53163627A JP 16362778 A JP16362778 A JP 16362778A JP S6232112 B2 JPS6232112 B2 JP S6232112B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- diaphragm
- electrode pattern
- lower electrode
- ink
- 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
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000005476 soldering Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000007641 inkjet printing Methods 0.000 description 2
- 238000011000 absolute method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- 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
- B41J2002/14491—Electrical connection
Description
【発明の詳細な説明】
本発明はインクオンデイマンド型のインクジエ
ツトヘツドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink-on-demand type ink jet head.
インクオンデイマンド型のインクジエツトヘツ
ドは、電気機械変換素子として圧電素子が一般に
使用されている。最近圧電素子も薄膜化され配線
処理も簡略化されているが、素子部品の配線処理
の絶対的な方法はない。 Ink-on-demand type ink jet heads generally use piezoelectric elements as electromechanical transducers. Recently, piezoelectric elements have also been made thinner and wiring processing has been simplified, but there is no absolute method for wiring processing of element parts.
従来の方法を第１図に於いて説明する。第１図
は従来の方法のヘツドの断面図で、基体１に設け
られた圧力室９とノズル８は、振動板２が振動す
る事により、圧力室９内のインク圧を変化させて
インク粒子をノズル８より噴出させる。この時の
振動手段として圧電素子６が使われる。圧電素子
６は上下に電極５，４が処理され、一方が圧力室
９上の振動板２に配された電極３に接合され、他
方はリード線７に接続されている。リード線７と
電極３の間に、電圧１０が印加されると圧電素子
６が歪みを起こし振動板を振動させる。 The conventional method will be explained with reference to FIG. FIG. 1 is a cross-sectional view of a head using a conventional method, in which a pressure chamber 9 and a nozzle 8 provided in a base body 1 change the ink pressure in the pressure chamber 9 by vibrating a diaphragm 2, thereby generating ink particles. is ejected from the nozzle 8. A piezoelectric element 6 is used as a vibration means at this time. The piezoelectric element 6 is provided with electrodes 5 and 4 on the upper and lower sides, one of which is joined to the electrode 3 disposed on the diaphragm 2 above the pressure chamber 9, and the other connected to the lead wire 7. When a voltage 10 is applied between the lead wire 7 and the electrode 3, the piezoelectric element 6 is distorted, causing the diaphragm to vibrate.
しかし、従来のこのようなインクジエツトヘツ
ドの圧電素子がインクを噴射するため高い周波数
で振動すると、圧電素子の両側の電極部分が高速
でたわみ、例えリード線７が圧電素子６の電極５
にハンダ付けで接続されたとしても容易に剥離し
てしまい接続の信頼性を欠いた。また、リード線
７と圧電素子６の接続部を強固に固定しようとし
てハンダの量等を多くすると、振動を妨げること
となり、ヘツドの噴射特性が損なわれてしまう。 However, when the piezoelectric element of the conventional ink jet head vibrates at a high frequency to eject ink, the electrode portions on both sides of the piezoelectric element bend at high speed, and even if the lead wire 7 is connected to the electrode 5 of the piezoelectric element 6.
Even if they were connected by soldering, they would peel off easily and the connection would become unreliable. Furthermore, if the amount of solder is increased in an attempt to firmly fix the connection between the lead wire 7 and the piezoelectric element 6, vibrations will be hindered and the jetting characteristics of the head will be impaired.
本発明の目的はかかる従来技術の欠点をなく
し、インクの噴射特性を損なわずにヘツドの駆動
信号を圧電素子に確実に伝達することを可能にす
る。ンクジエツトヘツドを提供する点にある。 An object of the present invention is to eliminate the drawbacks of the prior art and to make it possible to reliably transmit a head drive signal to the piezoelectric element without impairing the ink jetting characteristics. The main purpose of this invention is to provide a jet head.
本発明のインクジエツトヘツドの一実施例を第
２図、第３図を用い説明する。 An embodiment of the ink jet head of the present invention will be described with reference to FIGS. 2 and 3.
第２図は本発明による７ノズル用インクジエツ
トヘツドの平面図、第３図はその部分断面図であ
る。平板状の基体１には７個のノズル８−１，８
−２，…８−７と７個の圧力室９、圧力室９とノ
ズルをつなぐインク路１５が設けられ、振動板２
で上部がおおわれている。振動板２上には、各々
の圧力室９に対応した位置に圧電素子６−１，６
−２，……６−７が設けられている。 FIG. 2 is a plan view of a seven-nozzle ink jet head according to the present invention, and FIG. 3 is a partial sectional view thereof. Seven nozzles 8-1, 8 are provided on the flat base 1.
-2,...8-7 and seven pressure chambers 9, an ink path 15 connecting the pressure chamber 9 and the nozzle,
The top is covered with. On the diaphragm 2, piezoelectric elements 6-1 and 6 are located at positions corresponding to the respective pressure chambers 9.
-2, . . . 6-7 are provided.
圧電素子６は、振動板２に接する側の面に下部
電極１６が圧電素子の外径より小さい形状で形成
され、振動板２と反対側の面上に形成された上部
電極１７は圧電素子の側部端面まで延長形成され
ている。振動板２上には下部電極１６に接続する
ための共通電極パターン１３が圧力室９に対応し
た位置に、圧電素子６の外径より小さい形状に形
成され、共通電極パターンの外側には隣接して選
択駆動用電極パターン１２が形成されている。そ
して圧電素子６が振動板２上に接合されることに
より、下部電極１６が共通電極パターン１３に接
続され、上部電極１７の側部端面の一部と選択駆
動用電極パターン１２がハンダあるいは有料性導
電接着剤等の導電性接合部材１１により電気的に
接合される。 The piezoelectric element 6 has a lower electrode 16 formed on the surface that is in contact with the diaphragm 2 with a shape smaller than the outer diameter of the piezoelectric element, and an upper electrode 17 formed on the surface opposite to the diaphragm 2 that is smaller than the outer diameter of the piezoelectric element. It is formed to extend to the side end face. A common electrode pattern 13 for connecting to the lower electrode 16 is formed on the diaphragm 2 at a position corresponding to the pressure chamber 9 and has a shape smaller than the outer diameter of the piezoelectric element 6, and is adjacent to the outside of the common electrode pattern. A selective driving electrode pattern 12 is formed. Then, by bonding the piezoelectric element 6 onto the diaphragm 2, the lower electrode 16 is connected to the common electrode pattern 13, and a part of the side end surface of the upper electrode 17 and the selective drive electrode pattern 12 are connected to each other by soldering or by soldering. They are electrically joined by a conductive joining member 11 such as a conductive adhesive.
なお、共通電極パターン１３と選択駆動用電極
パターン１２（１２−１，１２−２，…１２−
７）は振動板２上に厚膜あるいは薄膜にて形成さ
れている。 Note that the common electrode pattern 13 and the selective drive electrode pattern 12 (12-1, 12-2,...12-
7) is formed on the diaphragm 2 with a thick film or a thin film.
共通電極パターン１３と選択駆動用電極パター
ン１２の間に電圧１０が印加されると圧電素子６
は歪み、振動板２との間で歪量が倍増されて、圧
力室９を加圧してノズル８よりインクを発射す
る。 When a voltage 10 is applied between the common electrode pattern 13 and the selection drive electrode pattern 12, the piezoelectric element 6
is distorted, and the amount of distortion is doubled between it and the diaphragm 2, pressurizing the pressure chamber 9 and ejecting ink from the nozzle 8.
以上説明した本発明のインクジエツトヘツドに
よれば、ヘツド上に複数の圧電素子が搭載される
が、平板状の圧電素子を駆動する圧電素子の両面
に設けられた駆動用電極に駆動用信号を伝達する
のに、圧電素子の上面に設けられた上部電極を側
部端面まで延長して該側部端面の一部と振動板上
の選択駆動用電極を導電性接合部材により電気的
接合しているため、駆動の際生ずる圧電素子の振
動の影響が極めて小さく、接続の電気的信頼性、
耐久性が極めて高いばかりか、電気的接続により
圧電素子の振動特性は何ら損なわれず、極めて良
好なインクの噴射をおこなうことができる。従つ
て、複数のノズルからインクを噴出する際、ノズ
ルによらずインクの量、噴出スピードが同じ鮮明
な印刷をおこなうことができる。 According to the inkjet head of the present invention described above, a plurality of piezoelectric elements are mounted on the head, and a driving signal is sent to the driving electrodes provided on both sides of the piezoelectric element that drives the flat piezoelectric element. For transmission, an upper electrode provided on the top surface of the piezoelectric element is extended to the side end surface, and a part of the side end surface and the selection drive electrode on the diaphragm are electrically connected using a conductive bonding member. Therefore, the influence of vibration of the piezoelectric element that occurs during driving is extremely small, and the electrical reliability of the connection is improved.
Not only is the durability extremely high, but the vibration characteristics of the piezoelectric element are not impaired in any way by the electrical connection, and extremely good ink jetting can be performed. Therefore, when ink is ejected from a plurality of nozzles, clear printing can be achieved with the same amount of ink and ejection speed regardless of the nozzles.
また、選択駆動用電極パターン１２と圧電素子
６の側部の電極を接続する際、振動板２上の共通
電極パターン１３は、圧電素子６の大きさより小
さな形状であるため、電気的接合部材により圧電
素子６の上部電極１６等がシユート等してしまう
こともない。 Furthermore, when connecting the selection drive electrode pattern 12 and the side electrodes of the piezoelectric element 6, the common electrode pattern 13 on the diaphragm 2 has a shape smaller than the size of the piezoelectric element 6. The upper electrode 16 and the like of the piezoelectric element 6 will not shoot out.
また、インクジエツトヘツドの製造工程の工数
の低減も可能となる。 Furthermore, it is possible to reduce the number of man-hours in the manufacturing process of the ink jet head.
第１図は従来のインクジエツトヘツドの部分断
面図、第２図、第３図は本発明のインクジエツト
ヘツドの一実施例を示す平面図及び部分断面図で
ある。
１…基体、２…振動板、３…電極、４…下部電
極、５…上部電極、６…圧電素子、７…リード
線、８…ノズル、９…圧力室、１０…電圧、１１
…有材性導電接着剤、１２…選択駆動用電極パタ
ーン、１３…共通電極パターン、１４…ヘツド本
体、１５…インク路、１６…下部電極、１７…上
部電極。
FIG. 1 is a partial sectional view of a conventional inkjet head, and FIGS. 2 and 3 are a plan view and a partial sectional view of an embodiment of the inkjet head of the present invention. DESCRIPTION OF SYMBOLS 1... Base, 2... Vibration plate, 3... Electrode, 4... Lower electrode, 5... Upper electrode, 6... Piezoelectric element, 7... Lead wire, 8... Nozzle, 9... Pressure chamber, 10... Voltage, 11
...Material conductive adhesive, 12...Selective drive electrode pattern, 13...Common electrode pattern, 14...Head body, 15...Ink path, 16...Lower electrode, 17...Upper electrode.
Claims (1)
各々に連通した複数の圧力室を設け、前記基体に
振動板を接合し、前記圧力室に対応した前記振動
板上の各々の位置に複数の平板状の圧電素子を設
けたインクオンデイマンド型のインクジエツトヘ
ツドにおいて、 前記圧電素子の前記振動板に接する側の面に下
部電極１６を圧電素子の外径より小さい形状で形
成するとともに、前記振動板と反対側の面上に形
成した上部電極１７を圧電素子の側部端面まで延
長形成し、 前記振動板上には、前記圧電素子の下部電極１
６が共通に接続される共通電極パターンが前記圧
力室に対応した各々の位置に前記圧電素子の外径
より小さい形状で形成されるとともに、前記共通
電極パターンに隣接して前記複数の圧電素子を選
択駆動するための選択駆動用電極パターンが形成
され、前記圧電素子が前記振動板に接合されるこ
とにより下部電極１６と共通電極パターンが接続
され、前記圧電素子の上部電極１７の側部端面の
一部と前記選択駆動用電極パターンが導電性接合
部材で電気的に接合されたことを特徴とするイン
クジエツトヘツド。[Scope of Claims] 1. A plurality of nozzles and a plurality of pressure chambers communicating with each of the nozzles are provided on a flat base, a diaphragm is bonded to the base, and a diaphragm on the diaphragm corresponding to the pressure chamber is provided. In an ink-on-demand type ink jet head in which a plurality of flat piezoelectric elements are provided at each position, a lower electrode 16 is formed on the surface of the piezoelectric element on the side that contacts the diaphragm, and the lower electrode 16 has a shape smaller than the outer diameter of the piezoelectric element. and an upper electrode 17 formed on the surface opposite to the diaphragm is extended to a side end surface of the piezoelectric element, and a lower electrode 1 of the piezoelectric element is formed on the diaphragm.
A common electrode pattern to which the plurality of piezoelectric elements 6 are commonly connected is formed at each position corresponding to the pressure chamber in a shape smaller than the outer diameter of the piezoelectric element, and the plurality of piezoelectric elements are connected adjacent to the common electrode pattern. A selective driving electrode pattern for selective driving is formed, and the piezoelectric element is bonded to the diaphragm to connect the lower electrode 16 and the common electrode pattern, and the side end surface of the upper electrode 17 of the piezoelectric element is connected to the lower electrode 16 and the common electrode pattern. An ink jet head characterized in that a portion of the selective driving electrode pattern is electrically connected to the selective driving electrode pattern using a conductive connecting member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16362778A JPS5586765A (en) | 1978-12-23 | 1978-12-23 | Electric wiring for ink jet head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16362778A JPS5586765A (en) | 1978-12-23 | 1978-12-23 | Electric wiring for ink jet head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5586765A JPS5586765A (en) | 1980-06-30 |
| JPS6232112B2 true JPS6232112B2 (en) | 1987-07-13 |
Family
ID=15777517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16362778A Granted JPS5586765A (en) | 1978-12-23 | 1978-12-23 | Electric wiring for ink jet head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5586765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02112540A (en) * | 1988-10-20 | 1990-04-25 | Hitomi Shimada | Engaging block and assembling method therefor |
| JPH0351450A (en) * | 1989-07-17 | 1991-03-05 | Ueda Kensetsu:Kk | Building made of wooden blocks |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH064320B2 (en) * | 1984-07-31 | 1994-01-19 | キヤノン株式会社 | Inkjet recording head |
| US6601949B1 (en) | 1992-08-26 | 2003-08-05 | Seiko Epson Corporation | Actuator unit for ink jet recording head |
| US7048361B2 (en) * | 2003-11-05 | 2006-05-23 | Xerox Corporation | Ink jet apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249035A (en) * | 1975-09-29 | 1977-04-19 | Siemens Ag | Piezoelectric drive element for recording head or ink mosaic recorder |
| JPS52150637A (en) * | 1976-06-07 | 1977-12-14 | Silonics | Ink feeder and printing head |
-
1978
- 1978-12-23 JP JP16362778A patent/JPS5586765A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5249035A (en) * | 1975-09-29 | 1977-04-19 | Siemens Ag | Piezoelectric drive element for recording head or ink mosaic recorder |
| JPS52150637A (en) * | 1976-06-07 | 1977-12-14 | Silonics | Ink feeder and printing head |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02112540A (en) * | 1988-10-20 | 1990-04-25 | Hitomi Shimada | Engaging block and assembling method therefor |
| JPH0351450A (en) * | 1989-07-17 | 1991-03-05 | Ueda Kensetsu:Kk | Building made of wooden blocks |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5586765A (en) | 1980-06-30 |
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