JPS6127277Y2 - - Google Patents
Info
- Publication number
- JPS6127277Y2 JPS6127277Y2 JP14232980U JP14232980U JPS6127277Y2 JP S6127277 Y2 JPS6127277 Y2 JP S6127277Y2 JP 14232980 U JP14232980 U JP 14232980U JP 14232980 U JP14232980 U JP 14232980U JP S6127277 Y2 JPS6127277 Y2 JP S6127277Y2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric ceramic
- middle plate
- plate
- adhesive
- piezoelectric
- 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
- 239000000919 ceramic Substances 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案は圧電磁器振動子に関し、特に、可聴音
を発生させる、圧電スピーカやブザーなどの電気
音響変換器の振動板として用いられるのに好適な
圧電磁器振動子に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric vibrator, and more particularly to a piezoelectric vibrator suitable for use as a diaphragm in an electroacoustic transducer such as a piezoelectric speaker or a buzzer that generates audible sound.
従来の圧電磁器振動子の一例を第１図に示す。
図において１および２は圧電磁器板、３は前記圧
電磁器板１，２間にサンドイツチ状に挾まれて接
着された弾性材中板である。前記中板３は、第２
図に示すように、平板で形成されている。なお、
図示は省略しているが、圧電磁器板１，２には、
それぞれ電極が形成される。 An example of a conventional piezoelectric ceramic vibrator is shown in FIG.
In the figure, 1 and 2 are piezoelectric ceramic plates, and 3 is an elastic intermediate plate sandwiched between the piezoelectric ceramic plates 1 and 2 in a sandwich-like manner and bonded. The middle plate 3 is a second
As shown in the figure, it is made of a flat plate. In addition,
Although not shown, the piezoelectric ceramic plates 1 and 2 include
Electrodes are formed respectively.
このような、圧電磁器振動子において、低周波
域での周波数レスポンスの向上をはかるために、
中板３の厚みを薄くすると、接着強度が低下し、
使用中に中板３と圧電磁器板１，２との間の接着
が剥離し易くなるなどの欠点があつた。 In order to improve the frequency response in the low frequency range of such piezoelectric ceramic vibrators,
When the thickness of the middle plate 3 is reduced, the adhesive strength decreases,
There was a drawback that the adhesive between the intermediate plate 3 and the piezoelectric ceramic plates 1 and 2 was likely to peel off during use.
例えば、本考案者の実験によれば、直径27mm厚
さ0.1mmの圧電磁器板２枚で、厚さ60μｍの中板
（ベリリウム、銅など）を挾んで接着一体化した
圧電磁器振動子の周波数特性は、第５図点線のよ
うになつた。この場合、音源すなわち圧電磁器振
動子より約10cmの距離で、音圧が約100dBになる
と接着の剥離を生じた。 For example, according to the inventor's experiments, the frequency of a piezoelectric ceramic vibrator made by bonding two piezoelectric ceramic plates with a diameter of 27 mm and a thickness of 0.1 mm and sandwiching a 60 μm thick middle plate (beryllium, copper, etc.) The characteristics were as shown by the dotted line in Figure 5. In this case, the adhesive peeled off when the sound pressure reached about 100 dB at a distance of about 10 cm from the sound source, that is, the piezoelectric ceramic vibrator.
本考案は、弾性材中板に多数の貫通孔を穿設す
ることにより、接着強度を向上して前述の欠点を
除去し、低周波域での周波数レスポンスを改善し
た圧電磁器振動子を提供しようとするものであ
る。 The present invention aims to provide a piezoelectric ceramic vibrator with improved frequency response in the low frequency range by improving adhesive strength and eliminating the above-mentioned drawbacks by drilling a large number of through holes in the middle plate of elastic material. That is.
第３図は本考案の一実施例の断面図、第４図は
第３において用いられる弾性材中板の平面図であ
る。図において１，２は圧電磁器板、３Ａは前記
圧電磁器板１，２間に接着挾持された中板、４は
中板に穿設された小孔である。 FIG. 3 is a sectional view of one embodiment of the present invention, and FIG. 4 is a plan view of an elastic material intermediate plate used in the third embodiment. In the figure, 1 and 2 are piezoelectric ceramic plates, 3A is a middle plate adhesively sandwiched between the piezoelectric ceramic plates 1 and 2, and 4 is a small hole bored in the middle plate.
第４図に良く示されるように、本実施例では、
中板３Ａに多数の小孔４を設けているので、中板
３Ａを間に挾んで、２枚の圧電磁器板１，２を結
合一体化する際に、接着剤が小孔４を介して、両
圧電磁器板に直接触するようになる。このため
に、圧電磁器板−中板−圧電磁器板の接着強度が
格段に向上する。 As clearly shown in FIG. 4, in this example,
Since a large number of small holes 4 are provided in the middle plate 3A, when the two piezoelectric ceramic plates 1 and 2 are joined together with the middle plate 3A in between, the adhesive passes through the small holes 4. , comes into direct contact with both piezoelectric ceramic plates. For this reason, the adhesive strength between the piezoelectric ceramic plate, the intermediate plate, and the piezoelectric ceramic plate is significantly improved.
本考案にしたがつて、中板３Ａに穿設される小
孔４の孔径は、0.2〜５mm程度であるのが好まし
く、また小孔４の配列は、中板３Ａのほぼ全面に
わたるようになるのが好ましい。 According to the present invention, the diameter of the small holes 4 formed in the middle plate 3A is preferably about 0.2 to 5 mm, and the arrangement of the small holes 4 covers almost the entire surface of the middle plate 3A. is preferable.
本考案によれば、直径30mm、厚さ0.1mmの圧電
磁器板２枚と、厚さ10〜60μｍの中板（ベリリウ
ム、銅など）を接着剤で結合一体化した場合、第
５図のように、低域でレスポンスの良い周波数特
性が得られた。また、音源すなわち圧電磁器振動
子より約10cmの距離で、音圧100dBの出力が得ら
れるような駆動条件で、連続使用しても、接着の
剥離は全く生じなかつた。 According to the present invention, when two piezoelectric ceramic plates with a diameter of 30 mm and a thickness of 0.1 mm and a middle plate (beryllium, copper, etc.) with a thickness of 10 to 60 μm are bonded together with adhesive, the result will be as shown in Figure 5. In addition, a frequency response with good response in the low range was obtained. Further, even when used continuously under driving conditions such that a sound pressure output of 100 dB was obtained at a distance of about 10 cm from the sound source, that is, the piezoelectric ceramic vibrator, no adhesive peeling occurred at all.
以上のように、本考案によれば、中板の厚みを
薄くすることにより圧電磁器振動子の低周波域で
のレスポンスを改善すると共に、中板に穿設した
小孔により、電極短絡のおそれ無しに接着強度を
増強し、音響出力の増大を実現することができ
る。 As described above, according to the present invention, the response of the piezoelectric ceramic vibrator in the low frequency range is improved by reducing the thickness of the middle plate, and the small holes drilled in the middle plate reduce the risk of electrode short-circuiting. It is possible to increase the adhesive strength and increase the acoustic output without having to use the adhesive.
第１図は従来の圧電磁器振動板の断面図、第２
図は第１図における中板の平面図、第３図は本考
案の一実施例の断面図、第４図は第３図における
中板の平面図、第５図は従来例と本考案の圧電磁
器振動板の周波数特性を示す図である。
１，２……圧電磁器板、３Ａ……中板。
Figure 1 is a cross-sectional view of a conventional piezoelectric ceramic diaphragm;
The figure is a plan view of the intermediate plate in Figure 1, Figure 3 is a cross-sectional view of an embodiment of the present invention, Figure 4 is a plan view of the intermediate plate in Figure 3, and Figure 5 is a diagram of the conventional example and the present invention. FIG. 3 is a diagram showing frequency characteristics of a piezoelectric ceramic diaphragm. 1, 2...piezoelectric ceramic plate, 3A...middle plate.
Claims (1)
体化してなる圧電磁器振動子において、前記弾性
材中板に多数の小孔を穿設し、三者を接着剤によ
つて結合一体化したことを特徴とする圧電磁器振
動子。 In a piezoelectric ceramic vibrator in which piezoelectric ceramics are mechanically bonded and integrated on both sides of an elastic medium plate, a large number of small holes are bored in the elastic medium plate, and the three parts are bonded and integrated using an adhesive. A piezoelectric ceramic vibrator characterized by:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14232980U JPS6127277Y2 (en) | 1980-10-07 | 1980-10-07 | |
| US06/257,652 US4638205A (en) | 1980-05-06 | 1981-04-27 | Piezo-electric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14232980U JPS6127277Y2 (en) | 1980-10-07 | 1980-10-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5764997U JPS5764997U (en) | 1982-04-17 |
| JPS6127277Y2 true JPS6127277Y2 (en) | 1986-08-14 |
Family
ID=29502135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14232980U Expired JPS6127277Y2 (en) | 1980-05-06 | 1980-10-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127277Y2 (en) |
-
1980
- 1980-10-07 JP JP14232980U patent/JPS6127277Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5764997U (en) | 1982-04-17 |
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