JPS5927699A - Piezoelectric oscillator - Google Patents
Piezoelectric oscillatorInfo
- Publication number
- JPS5927699A JPS5927699A JP13686782A JP13686782A JPS5927699A JP S5927699 A JPS5927699 A JP S5927699A JP 13686782 A JP13686782 A JP 13686782A JP 13686782 A JP13686782 A JP 13686782A JP S5927699 A JPS5927699 A JP S5927699A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- resistor
- piezoelectric
- plate
- board
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 238000010030 laminating Methods 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 claims 1
- 230000010287 polarization Effects 0.000 abstract description 6
- 229910001369 Brass Inorganic materials 0.000 abstract description 5
- 239000010951 brass Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 description 3
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 3
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
Description
【発明の詳細な説明】
く産業上の利用分野〉
本発明はチタン酸ジルコン酸鉛等の圧電素子板と黄銅板
等の金鞘板とを接着してなるいわゆるユニモルフ型の圧
電振動子に関するものである。[Detailed description of the invention] Industrial application field> The present invention relates to a so-called unimorph type piezoelectric vibrator made by bonding a piezoelectric element plate made of lead zirconate titanate or the like to a gold sheath plate such as a brass plate. It is.
く従来技術〉
従来この種のユニモルフ型圧電振動子は第１図に示す如
く、両面に銀等の金属電極１、１′を有する圧電素子板
２と黄銅等からなる金属板３とを接着剤４にて接着して
形成され、その両面間にリード線５、５′を介して交流
電圧を印加すると振動子は第２図に示す如く屈曲振動を
起す。Conventionally, as shown in FIG. 1, this type of unimorph type piezoelectric vibrator is made by bonding a piezoelectric element plate 2 having metal electrodes 1 and 1' made of silver or the like on both sides and a metal plate 3 made of brass or the like with an adhesive. 4, and when an alternating current voltage is applied between both surfaces of the vibrator through lead wires 5 and 5', the vibrator causes bending vibration as shown in FIG.
この原理を利用して′圧電振動子単体或いはこの振動子
にコーン紙のような別の振動板を連結し、電気音響交換
器として用いられて来た。Utilizing this principle, a piezoelectric vibrator alone or a piezoelectric vibrator connected to another diaphragm such as a paper cone has been used as an electroacoustic exchanger.
〈問題点〉
かかる圧電振動子の最大の欠点は熱衝撃いわゆる温度サ
イクルによって初期性能が大巾に低下することである。<Problems> The biggest drawback of such piezoelectric vibrators is that their initial performance is significantly reduced by thermal shock, so-called temperature cycling.
特に静電容量の大きい圧電振動子ほどその傾向が顕著で
ある。This tendency is particularly noticeable in piezoelectric vibrators with larger capacitance.
一般的に熱膨張係数が大きく異なる圧電素子板と金属板
とで構成され・る、振動子に急激な熱変化（例えば−２
５°〜７０℃）を加えると、振動子は第２図に波線で示
すように屈曲し高電圧を発生する。こうして発生した高
電圧が外部で消費されないため圧電素子の分極を破壊し
、その結果圧電振動子の初期性能が低下していた。In general, the vibrator is composed of a piezoelectric element plate and a metal plate, which have significantly different coefficients of thermal expansion.
5° to 70° C.), the vibrator bends as shown by the dotted line in FIG. 2 and generates a high voltage. Since the high voltage thus generated is not consumed externally, it destroys the polarization of the piezoelectric element, resulting in a decrease in the initial performance of the piezoelectric vibrator.
〈目的〉
本発明はかかる欠点を除去し性能の安定した電気音響変
換器の圧電振動子を提供するものである。<Objective> The present invention eliminates the above drawbacks and provides a piezoelectric vibrator for an electroacoustic transducer with stable performance.
く解決するための手段〉
即ち本発明ではユニモルフ型の圧電振動子において、圧
電素子板と金属板との間に発生する電圧を抵抗若しくけ
導電材料を介して短絡することによって消費させ、圧電
素子の分極の破壊を防止しようとするものである。In other words, in the present invention, in a unimorph type piezoelectric vibrator, the voltage generated between the piezoelectric element plate and the metal plate is consumed by short-circuiting it through a resistor or a conductive material, and the piezoelectric This is intended to prevent the polarization of the element from being destroyed.
〈実施例〉
第３図は本発明の１実施例を示し、ここでは、上記第１
図に示すと同一の構造を有するユニモルフ型の圧電振動
子、即ち、両面に銀材料による金属電極１．１′を有す
るチタン酸ジルコン酸鉛からなる圧電素子板２と黄銅材
料よシなる金属板３とをエポキシ系の接着剤４を用いて
貼合わせてなるユニモルフ型の圧電振動子において、特
に外側の卑属電極１と金属板３との間に抵抗６を接続し
たものである。<Embodiment> FIG. 3 shows one embodiment of the present invention, and here, the above-mentioned first embodiment is shown.
The figure shows a unimorph type piezoelectric vibrator having the same structure, that is, a piezoelectric element plate 2 made of lead zirconate titanate and a metal plate made of brass material with metal electrodes 1.1' made of silver material on both sides. In this unimorph piezoelectric vibrator, a resistor 6 is connected between the outer base metal electrode 1 and the metal plate 3.
いま上記金属板３として直径２１間、厚さ０．１５柵の
黄銅円板を使用し、また圧電素子板２として直径２０謹
、厚さ０．１ ｍｍのチタン酸ジルコン酸鉛の円板を使
用し、両者をエポキシ系の接着剤４を用いて貼合わせ、
そして外側の金属電極１と金属板３との間にＩＯＫΩの
抵抗６を接続した状態で、７０℃で２時間且つ一２５℃
で２時間を１サイクルとして５サイクルの温度サイクル
繰返しによる環境試験を行なった結果、第１表に示す結
果が得られた。Now, as the metal plate 3, a brass disk with a diameter of 21 mm and a thickness of 0.1 mm is used, and as the piezoelectric element plate 2, a lead zirconate titanate disk with a diameter of 20 mm and a thickness of 0.1 mm is used. and bond them together using epoxy adhesive 4.
Then, with a resistor 6 of IOKΩ connected between the outer metal electrode 1 and the metal plate 3, it was heated at 70°C for 2 hours and at -25°C.
As a result of conducting an environmental test by repeating 5 cycles of temperature cycles, each cycle having 2 hours, the results shown in Table 1 were obtained.
第１表
即ち抵抗６を接続しない従来品の場合、圧電素子板２に
発生する高電圧により圧電素子内部で分極破壊が生じ、
環境試験後にその静電容量が約２５％低下するのに対し
、本実施例では圧電素子板２に発生する高電圧は抵抗６
を介して短絡され環境試験後でも静電容量は殆んど低下
しないことが確認された。In Table 1, in the case of the conventional product in which the resistor 6 is not connected, polarization breakdown occurs inside the piezoelectric element due to the high voltage generated on the piezoelectric element plate 2.
While the capacitance decreases by about 25% after the environmental test, in this example, the high voltage generated on the piezoelectric element plate 2 is reduced by the resistor 6.
It was confirmed that the capacitance hardly decreased even after an environmental test in which the capacitance was short-circuited through the capacitor.
上記のような結果から、上記実施例の圧電振動子を電気
音響変換器に用いた場合、長期に亘る使用中に初期性能
が劣化することもなく、耐久性のよい安定した変換器が
得られることになる。From the above results, when the piezoelectric vibrator of the above example is used in an electroacoustic transducer, the initial performance does not deteriorate during long-term use, and a durable and stable transducer can be obtained. It turns out.
なお上記実施例では抵抗６を接続しているが、この場合
電極１と金属板に抵抗６の足を半田付けする必要があり
作業が煩雑化する欠点がある。。In the above embodiment, the resistor 6 is connected, but in this case it is necessary to solder the legs of the resistor 6 to the electrode 1 and the metal plate, which has the disadvantage of complicating the work. .
そこで第４図に示す本発明の他の実施例では、抵抗６を
接続する代わりに、圧電素子板２と金属板３との接合縁
部に適度な抵抗成分を持った導電性塗料（寸たは導電性
ゴムでもよい）７を塗布したものである。この場合抵抗
６を接続した場合と同様に、たとえ圧電素子板２に、高
電圧が発生されたとしても、この電圧は導電性塗料７を
介して短絡され、圧電素子内部で分極破壊を生じる虞れ
はない。Therefore, in another embodiment of the present invention shown in FIG. 4, instead of connecting the resistor 6, a conductive paint with an appropriate resistance component is applied to the joint edge of the piezoelectric element plate 2 and the metal plate 3. may be made of conductive rubber). In this case, as in the case where the resistor 6 is connected, even if a high voltage is generated on the piezoelectric element plate 2, this voltage may be short-circuited through the conductive paint 7 and cause polarization breakdown inside the piezoelectric element. There is no such thing.
〈効果〉
本発明の圧電振動子によれば、上記のように両面に金属
電極を有する圧電素子板と金属板とを貼合わせてなるユ
ニモルフ型の圧電振動子において、圧電素子板の外側金
属電接と金属板との間を１１（抗性導電材料にて電気的
接続しているだめ、急激な熱変化により圧電素子板に高
電圧が発生した場合でもこの電圧は導電材料にて速−や
かに短絡され、それ故に圧電素子内部で分極破壊を生じ
る虞れはなく安定した性能の電気音響変換器を得ること
が可能である。<Effects> According to the piezoelectric vibrator of the present invention, in the unimorph type piezoelectric vibrator formed by laminating a piezoelectric element plate having metal electrodes on both surfaces and a metal plate as described above, the outer metal electrode of the piezoelectric element plate Since the electrical connection between the contact and the metal plate is made using a resistant conductive material, even if a high voltage is generated on the piezoelectric element plate due to a sudden thermal change, this voltage can be quickly and quickly removed by the conductive material. It is possible to obtain an electroacoustic transducer with stable performance without the risk of short-circuiting and therefore causing polarization breakdown inside the piezoelectric element.
第１図は、従来一般の圧電振動子の断面図、第
１２図は、同圧電振動子の動作説明のための」１１面図
、第３図は本発明の１実施例の断面図、第４図は本発明
の他の実施例の断面図である０
１．１′ ・・・金属電極、２・・・・・・圧電素子板
、３・・・金属板、４・・・・・・接着剤、６・・・・
・抵抗、７ ・・・導電性塗料Figure 1 is a cross-sectional view of a conventional general piezoelectric vibrator.
12 is a plan view for explaining the operation of the piezoelectric vibrator, FIG. 3 is a cross-sectional view of one embodiment of the present invention, and FIG. 4 is a cross-sectional view of another embodiment of the present invention. 1.1'...metal electrode, 2...piezoelectric element plate, 3...metal plate, 4...adhesive, 6...
・Resistance, 7... Conductive paint
Claims (1)
合わせてなるユニモルフ型の圧電振動子において、前記
圧電素子板の外側金属電極と金属板との間を抵抗性導電
材料にて電気的に接続してなる圧電振動子。 ２、前記抵抗性導電材料として抵抗素子を用いることを
特徴とする特許 載の圧電振動子。 ３、前記抵抗性導電材料として導電性塗料を用いること
を特徴とする前記特許請求の範囲第１項記載の圧電振動
子。[Scope of Claims] 1. In a unimorph type piezoelectric vibrator formed by laminating a piezoelectric element plate having metal electrolysis on both sides and a metal plate, a gap between the outer metal electrode of the piezoelectric element plate and the metal plate is provided. A piezoelectric vibrator electrically connected using a resistive conductive material. 2. The piezoelectric vibrator described in the patent, characterized in that a resistive element is used as the resistive conductive material. 3. The piezoelectric vibrator according to claim 1, wherein a conductive paint is used as the resistive conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13686782A JPS5927699A (en) | 1982-08-05 | 1982-08-05 | Piezoelectric oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13686782A JPS5927699A (en) | 1982-08-05 | 1982-08-05 | Piezoelectric oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5927699A true JPS5927699A (en) | 1984-02-14 |
Family
ID=15185373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13686782A Pending JPS5927699A (en) | 1982-08-05 | 1982-08-05 | Piezoelectric oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927699A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737676A (en) * | 1985-12-20 | 1988-04-12 | Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. | Transducer with a flexible piezoelectric layer as a sensor element |
| JP5040649B2 (en) * | 2005-11-02 | 2012-10-03 | 株式会社村田製作所 | Piezoelectric element |
| JP2019203809A (en) * | 2018-05-24 | 2019-11-28 | 一般社団法人日本建設機械施工協会 | Mobile ae sensor for degradation phenomenon inspection of pc structure |
-
1982
- 1982-08-05 JP JP13686782A patent/JPS5927699A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4737676A (en) * | 1985-12-20 | 1988-04-12 | Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik M.B.H. | Transducer with a flexible piezoelectric layer as a sensor element |
| JP5040649B2 (en) * | 2005-11-02 | 2012-10-03 | 株式会社村田製作所 | Piezoelectric element |
| JP2019203809A (en) * | 2018-05-24 | 2019-11-28 | 一般社団法人日本建設機械施工協会 | Mobile ae sensor for degradation phenomenon inspection of pc structure |
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