JPH0510000B2 - - Google Patents
Info
- Publication number
- JPH0510000B2 JPH0510000B2 JP61284791A JP28479186A JPH0510000B2 JP H0510000 B2 JPH0510000 B2 JP H0510000B2 JP 61284791 A JP61284791 A JP 61284791A JP 28479186 A JP28479186 A JP 28479186A JP H0510000 B2 JPH0510000 B2 JP H0510000B2
- Authority
- JP
- Japan
- Prior art keywords
- sound emitting
- piezoelectric
- sound
- receiving
- electroacoustic transducer
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は圧電ブザー、圧電スピーカ、圧電マイ
クロフオン等の電気音響変換デバイスに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to electroacoustic transducer devices such as piezoelectric buzzers, piezoelectric speakers, and piezoelectric microphones.
（従来の技術）
従来の圧電板と支持体とを接着した構造の電気
音響変換デバイスに対し、本願発明者はすでに発
受音部とこれを周辺で支持固定する部分とが同一
素材により一体化され形成された圧電式電気音響
変成デバイスの代表的な構造（第２図ａ，ｂ）を
提案している。同図において発音あるいは受音用
圧電板２１、電極２４，２４′、弾性板２２、支
持固定板２３，３３は接着剤を用いずに一体化さ
れている。そして電極を除いた他の部分はすべて
圧電セラミツクス材料で構成されている。圧電板
２１を分極処理した後電極２４，２４′から取り
出した電極端子２５，２５′の間に交流電気信号
を印加すると、２１，２２，２４，２４′から構
成された発受音部が機械的に屈曲振動して発音さ
せる。また、同部に外部から音圧が加わると音圧
の強度に応じて電気信号が電極端子２５，２５′
の間に生じる。(Prior Art) In contrast to the conventional electroacoustic transducer device which has a structure in which a piezoelectric plate and a support are bonded together, the inventor of the present application has already developed a method in which the sound emitting/receiving part and the part that supports and fixes it around it are made of the same material. We have proposed a typical structure of a piezoelectric electroacoustic transformation device (Fig. 2a, b) formed using this method. In the figure, a piezoelectric plate 21 for sound generation or sound reception, electrodes 24, 24', elastic plate 22, and supporting and fixing plates 23, 33 are integrated without using adhesive. All other parts except for the electrodes are made of piezoelectric ceramic material. After polarizing the piezoelectric plate 21, when an AC electric signal is applied between the electrode terminals 25 and 25' taken out from the electrodes 24 and 24', the sound emitting and receiving part composed of the electrodes 21, 22, 24, and 24' becomes mechanical. It bends and vibrates to produce sound. Also, when sound pressure is applied to the same part from the outside, an electric signal is transmitted to the electrode terminals 25, 25' depending on the intensity of the sound pressure.
occurs between
上記のデバイスは通常テープキヤステイング法
と呼ばれるセラミツクスの製造方法を利用して作
製されるもので、発受音部に一切手を触れる事な
く製造できるため、発受音部を極限まで薄くする
ことができるので低周波用に適した電気音響変換
デバイスといえる。また、本デバイスは接着剤を
用いることなく製造できるので、接着剤による信
頼性の低下や組み立て工程が不要なため、信頼
性、生産性に優れた圧電式電気音響変成デバイス
といえる。 The above device is usually manufactured using a ceramic manufacturing method called tape casting method, and since it can be manufactured without touching the sound emitting and receiving parts at all, it is possible to make the sound emitting and receiving parts as thin as possible. It can be said that it is an electroacoustic transducer device suitable for low frequencies. Furthermore, since this device can be manufactured without using adhesives, it can be said to be a piezoelectric electroacoustic transduction device with excellent reliability and productivity, as there is no need for any assembly process or lower reliability due to adhesives.
（発明が解決しようとする問題点）
上記の従来技術で作製される圧電式電気音響変
換デバイスの特徴の一つは発受音部を極限まで薄
くできることにある。しかし、この部分は主に圧
電セラミツク材料で構成されているためあまり薄
くすると外部からの衝撃等により機械的に破壊す
る場合がある。機械的な破壊強度を上げるために
発受音部の厚さを厚くするとその特徴の一つが消
えてしまう。また電気音響変換効率も劣化する。(Problems to be Solved by the Invention) One of the characteristics of the piezoelectric electroacoustic transducer device manufactured by the above-mentioned conventional technique is that the sound emitting and receiving portion can be made as thin as possible. However, since this part is mainly composed of piezoelectric ceramic material, if it is made too thin, it may be mechanically destroyed by an external impact or the like. If the thickness of the sound emitting/receiving section is increased in order to increase the mechanical breaking strength, one of its characteristics disappears. Furthermore, the electroacoustic conversion efficiency also deteriorates.
（問題点を解決するための手段）
本発明の圧電式電気音響変換デバイスは発受音
部の表面を薄い有機樹脂で被覆することを特徴と
する。(Means for Solving the Problems) The piezoelectric electroacoustic transducer device of the present invention is characterized in that the surface of the sound emitting and receiving portion is coated with a thin organic resin.
（作用）
本発明は上述の構成をとることにより従来技術
の問題点を解決した。(Function) The present invention solves the problems of the prior art by adopting the above-described configuration.
すなわち、本発明のデバイスは発受音部の厚さ
に比べて充分薄い有機樹脂膜でセラミツクスで構
成された発受音部を被覆することにより電気音響
的特性をそこなうことなく、機械的強度を大巾に
向上させることができる。 In other words, the device of the present invention increases mechanical strength without impairing electroacoustic characteristics by covering the sound emitting and receiving portion made of ceramics with an organic resin film that is sufficiently thin compared to the thickness of the sound emitting and receiving portion. It can be greatly improved.
（実施例）
以下、本発明の実施例について図面を参照しな
がら詳細に説明する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図ａ，ｂ，ｃは本発明の実施例を示す図で
ある。同図において発受音部１１と支持固定部１
２は圧電セラミツクスから構成され、かつ一体化
されている。図ａは発受音部の上面のみを薄い有
機樹脂膜１３で被つたものであり、図ｂは下図の
み、そして図ｃは両面を被つたものである。 FIGS. 1a, b, and c are diagrams showing embodiments of the present invention. In the same figure, the sound generation/reception part 11 and the support fixing part 1
2 is made of piezoelectric ceramics and is integrated. In figure a, only the upper surface of the sound emitting and receiving section is covered with a thin organic resin film 13, in figure b, only the lower figure is covered, and in figure c, both sides are covered.
この様に発受音部に比べて厚さが充分に薄く、
かつ弾性的な剛性の小さい有機樹脂膜で発受音部
を被覆することにより、従来デバイスの上記欠点
は取り除かれる。 In this way, the thickness is sufficiently thinner than the sound emitting and receiving part,
By covering the sound emitting and receiving portion with an organic resin film having low elastic stiffness, the above-mentioned drawbacks of the conventional device can be eliminated.
なお、有機樹脂被膜は液状の樹脂をスピンコー
ター、印刷、筆塗り等の方法で塗布し、その後加
熱して固化させることにより形成される。あるい
は薄いフイルム状の樹脂を貼り合わせてもよい。 The organic resin film is formed by applying a liquid resin using a spin coater, printing, brush painting, or the like, and then heating and solidifying the resin. Alternatively, a thin film-like resin may be bonded together.
（発明の効果）
以上の実施例から明らかな様に、セラミツクス
と電極から構成された発受音部表面に薄い有機樹
脂膜を形成することにより電気音響的特性を劣化
させることなく、機械的強度を大巾に向上させら
れる。従つて従来の発受音部とその周辺を支持固
定する部分とが同一素材で一体に形成された電気
音響変換デバイスの特徴を保持しその欠点を解決
した。(Effects of the Invention) As is clear from the above embodiments, by forming a thin organic resin film on the surface of the sound emitting/receiving section composed of ceramics and electrodes, mechanical strength can be improved without deteriorating the electroacoustic characteristics. can be greatly improved. Therefore, the characteristics of the conventional electroacoustic transducer device in which the sound emitting/receiving part and the part for supporting and fixing the surrounding area are integrally formed of the same material are maintained, and the drawbacks thereof are solved.
第１図ａ，ｂ，ｃは本発明の実施例を示す図、
第２図ａ，ｂは従来の圧電式電気音響変換デバイ
スの構造を示す図である。
図において、１１…発受音部用振動板、１２…
支持固定部、１３…有機樹脂膜、２１…圧電板、
２２…弾性板、２３…支持固定部、２４，２４′
…電極、２５，２５′…電極端子、２６…空孔を
それぞれ示している。
Figures 1a, b, and c are diagrams showing embodiments of the present invention;
FIGS. 2a and 2b are diagrams showing the structure of a conventional piezoelectric electroacoustic transducer device. In the figure, 11...diaphragm for sound generation/reception section, 12...
Supporting and fixing part, 13...organic resin film, 21...piezoelectric plate,
22...Elastic plate, 23...Supporting and fixing part, 24, 24'
. . . electrodes, 25, 25' . . . electrode terminals, 26 . . . holes, respectively.
Claims (1)
一素材により一体化して形成された圧電式電気音
響変換デバイスにおいて、発受音部表面を有機物
膜で被覆することを特徴とする圧電式電気音響変
換デバイス。1. A piezoelectric electroacoustic transducer device in which a sound emitting/receiving part and a part supporting and fixing its surroundings are integrally formed of the same material, characterized in that the surface of the sound emitting/receiving part is coated with an organic film. Sound conversion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61284791A JPS63136899A (en) | 1986-11-28 | 1986-11-28 | Piezoelectric electroacoustic transducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61284791A JPS63136899A (en) | 1986-11-28 | 1986-11-28 | Piezoelectric electroacoustic transducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136899A JPS63136899A (en) | 1988-06-09 |
| JPH0510000B2 true JPH0510000B2 (en) | 1993-02-08 |
Family
ID=17683068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61284791A Granted JPS63136899A (en) | 1986-11-28 | 1986-11-28 | Piezoelectric electroacoustic transducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63136899A (en) |
-
1986
- 1986-11-28 JP JP61284791A patent/JPS63136899A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63136899A (en) | 1988-06-09 |
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