JPS6246395Y2 - - Google Patents
Info
- Publication number
- JPS6246395Y2 JPS6246395Y2 JP691582U JP691582U JPS6246395Y2 JP S6246395 Y2 JPS6246395 Y2 JP S6246395Y2 JP 691582 U JP691582 U JP 691582U JP 691582 U JP691582 U JP 691582U JP S6246395 Y2 JPS6246395 Y2 JP S6246395Y2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- piezoelectric
- sound pressure
- support frame
- plate
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
本考案は圧電素子板を弾性薄板に接合した圧電
素子エレメントを用いた圧電発音体に係り、音圧
の向上と周波数特性の平坦化ならびに広帯域化を
計ろうとするものである。[Detailed description of the invention] This invention relates to a piezoelectric sounding body using a piezoelectric element in which a piezoelectric element plate is bonded to an elastic thin plate, and aims to improve sound pressure, flatten frequency characteristics, and widen the band. be.
一般に、圧電素子板と弾性薄板を接合した圧電
素子エレメントは、圧電素子板の両面の電極に交
流電圧を印加することにより屈曲振動し音を発生
させることができ、従来から圧電ブザーとして広
く使用されている。 In general, a piezoelectric element made by joining a piezoelectric element plate and an elastic thin plate can bend and vibrate to generate sound by applying an alternating current voltage to the electrodes on both sides of the piezoelectric element plate, and has been widely used as a piezoelectric buzzer. ing.
しかしながら、この圧電素子エレメントは単音
発生の警報的な目的でしか用いることができず、
発生音の周波数は2KHz以上がほとんどであつ
た。 However, this piezoelectric element can only be used for the purpose of generating a single sound as an alarm.
Most of the frequencies of the generated sounds were 2KHz or higher.
一方、最近LSIによる音声合成や合成メロデイ
化が実用化されるにつれて、広い帯域で高い音圧
を得ることが必要不可欠になつてきている。 On the other hand, as voice synthesis and synthesized melodies using LSI have recently been put into practical use, it has become essential to obtain high sound pressure over a wide band.
第１図は従来の圧電素子エレメント駆動の場合
における圧電発音体の音圧周波数特性例であり、
2000Hz付近に共振点があり、2500Hz付近の音圧が
反共振点付近に当るため、音圧が下つている。 Figure 1 shows an example of the sound pressure frequency characteristics of a piezoelectric sounding body in the case of a conventional piezoelectric element drive.
There is a resonance point around 2000Hz, and the sound pressure around 2500Hz hits around the anti-resonance point, so the sound pressure decreases.
このような圧電発音体は、上述の音声合成や合
成メロデイ用の発音体として利用する場合には上
述の周波数帯域の音圧向上が大きな課題である。 When such a piezoelectric sounding body is used as a sounding body for the above-mentioned voice synthesis or synthesized melody, it is a major issue to improve the sound pressure in the above-mentioned frequency band.
本考案は以上のような従来の欠点を除去するも
のである。 The present invention eliminates the above-mentioned drawbacks of the prior art.
以下、本考案の一実施例を第２図〜第５図によ
り説明する。第２図，第３図において、１は表面
に斜線部の電極２ａと裏面に電極（図示せず）を
有する圧電素子板２と金属製弾性薄板３を接着し
た第１の圧電素子エレメント、４は同じく表面に
斜線部の電極５ａと裏面に電極（図示せず）を有
する圧電素子板５と金属製弾性薄板６を接着した
第２の圧電素子エレメントである。７は２つの穴
７ａ，７ｂ（７ｂは図示せず）を有し、周囲を支
持枠８で接着固定された１枚の振動板であり、上
記穴７ａ，７ｂをふさぐように上記圧電素子エレ
メント１，２がこの振動板７にそれぞれ固着され
ている。上記支持枠８の上記圧電素子エレメント
１，４間にリブ８ａが一体に構成されており、こ
のリブ８ａは上記振動板７を固定し、それぞれの
振動系を分離独立させている。９は支持枠８に固
定された入力端子であり、リード線１０，１１に
よりそれぞれ圧電素子板２，５の電極２ａ，５ａ
と接続され、リード線１２，１３によりそれぞれ
弾性薄板３，６と接続されている。 An embodiment of the present invention will be described below with reference to FIGS. 2 to 5. In FIGS. 2 and 3, reference numeral 1 denotes a first piezoelectric element element 4 in which a piezoelectric element plate 2 having a diagonally shaded electrode 2a on the front surface and an electrode (not shown) on the back surface and a metal elastic thin plate 3 are adhered; 1 is a second piezoelectric element in which a piezoelectric element plate 5 having an electrode 5a shown in the shaded area on the front surface and an electrode (not shown) on the back surface and a metal elastic thin plate 6 are adhered. Reference numeral 7 denotes a single diaphragm having two holes 7a and 7b (7b not shown), the periphery of which is adhesively fixed with a support frame 8, and the piezoelectric element element is inserted so as to close the holes 7a and 7b. 1 and 2 are fixed to this diaphragm 7, respectively. A rib 8a is integrally formed between the piezoelectric elements 1 and 4 of the support frame 8, and this rib 8a fixes the diaphragm 7 and makes each vibration system separate and independent. 9 is an input terminal fixed to the support frame 8, and electrodes 2a and 5a of the piezoelectric element plates 2 and 5 are connected by lead wires 10 and 11, respectively.
and are connected to elastic thin plates 3 and 6 by lead wires 12 and 13, respectively.
このように構成された圧電発音体において、第
１の圧電素子エレメント１のみ駆動させた場合の
音圧周波数特性は上述した第１図となり、2000Hz
付近に共振点があり、2500Hz付近に反共振点があ
るため、2500Hz付近の音圧が下つていることが解
る。第４図は第２の圧電素子エレメント４のみ駆
動させた場合の音圧周波数特性であり、2500〜
3000Hz付近に共振点があり、音圧が高くなつてい
ることが解る。第５図は第１，第２の圧電素子エ
レメント１，４を同時に駆動させた場合の音圧周
波数特性を表わし、第１図で下つていた2500Hz付
近の音圧が補われて高くなつており、かつ全体の
音圧もやや高くなつている。 In the piezoelectric sounding body configured in this way, the sound pressure frequency characteristic when only the first piezoelectric element 1 is driven is as shown in Fig. 1 above, and is 2000Hz.
Since there is a resonance point nearby and an anti-resonance point near 2500Hz, it can be seen that the sound pressure around 2500Hz has decreased. Figure 4 shows the sound pressure frequency characteristics when only the second piezoelectric element 4 is driven, and shows the sound pressure frequency characteristics from 2500 to
It can be seen that there is a resonance point around 3000Hz, and the sound pressure is increasing. Figure 5 shows the sound pressure frequency characteristics when the first and second piezoelectric elements 1 and 4 are driven simultaneously. Moreover, the overall sound pressure is also slightly higher.
以上のように第１の圧電素子エレメント１の反
共振点に第２の圧電素子エレメント４の共振点を
ほぼ合致させることにより、平坦な音圧周波数特
性を得ることができる。また、これらはリブ８ａ
を付加し、それぞれの振動系を分離独立させるこ
とにより、より一層優れた平坦な特性を得ること
ができる。 As described above, by making the resonance point of the second piezoelectric element 4 substantially coincide with the anti-resonance point of the first piezoelectric element 1, a flat sound pressure frequency characteristic can be obtained. Also, these are the ribs 8a
By adding this and making each vibration system separate and independent, even better flat characteristics can be obtained.
なお、上記の一実施例では２つの圧電素子エレ
メントを使用する場合を示したが、他にも存在す
る反共振点における音圧を高めるため、第３，第
４等の多数の圧電素子エレメントを付加すれば、
さらに平坦な特性を得ることも可能である。 Although the above example shows the case where two piezoelectric elements are used, in order to increase the sound pressure at other anti-resonance points, a large number of piezoelectric elements such as third and fourth elements may be used. If you add
It is also possible to obtain even flatter characteristics.
以上のように本考案の圧電発音体は、複数の圧
電素子エレメントを組合せることにより、音圧周
波数特性の平坦化とともに音圧の向上も図れ、合
成メロデイや合成音声の再生も可能となり、実用
価値の大なるものである。 As described above, by combining multiple piezoelectric elements, the piezoelectric sounding body of the present invention can flatten sound pressure frequency characteristics and improve sound pressure, and can also play synthetic melodies and synthetic voices, making it practical. It is of great value.
第１図は従来品および本考案圧電発音体におけ
る第１の圧電素子エレメントのみ駆動の場合の音
圧周波数特性を示す図、第２図は本考案に係る圧
電発音体の一実施例を示す上面図、第３図は同第
２図のＡ−A′線よりみた断面図、第４図は同発
音体における第２の圧電素子エレメントのみ駆動
の場合の音圧周波数を示す図、第５図は本考案品
の音圧周波数特性を示す図である。
１……第１の圧電素子エレメント、２……圧電
素子板、３……弾性薄板、４……第２の圧電素子
エレメント、５……圧電素子板、６……弾性薄
板、７……振動板、８……支持枠、８ａ……リ
ブ。
Fig. 1 is a diagram showing sound pressure frequency characteristics when only the first piezoelectric element is driven in a conventional piezoelectric sounding element and the piezoelectric sounding element of the present invention, and Fig. 2 is a top view showing an embodiment of the piezoelectric sounding element according to the present invention. Figure 3 is a sectional view taken along line A-A' in Figure 2, Figure 4 is a diagram showing the sound pressure frequency when only the second piezoelectric element in the same sounding body is driven, and Figure 5. is a diagram showing the sound pressure frequency characteristics of the product of the present invention. DESCRIPTION OF SYMBOLS 1... First piezoelectric element, 2... Piezoelectric element plate, 3... Elastic thin plate, 4... Second piezoelectric element, 5... Piezoelectric element plate, 6... Elastic thin plate, 7... Vibration. Plate, 8... Support frame, 8a... Rib.
Claims (1)
１，第２の圧電素子エレメントを１枚の振動板に
固着し、この振動板の周囲を支持枠で固定し、か
つ上記第１の圧電素子エレメントの反共振周波数
と上記第２の圧電素子エレメントの共振周波数が
ほぼ合致するように構成し、さらに上記支持枠の
これら第１，第２の圧電素子エレメント間にそれ
ぞれの振動系を分離独立させるリブを構成してな
る圧電発音体。 First and second piezoelectric elements each having a piezoelectric element plate and an elastic thin plate bonded to each other are fixed to one diaphragm, the periphery of this diaphragm is fixed with a support frame, and the first piezoelectric element The structure is such that the anti-resonance frequency and the resonance frequency of the second piezoelectric element almost match, and further a rib is provided between the first and second piezoelectric elements of the support frame to separate and make each vibration system independent. A piezoelectric sounding body made up of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP691582U JPS58109798U (en) | 1982-01-20 | 1982-01-20 | piezoelectric sounding body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP691582U JPS58109798U (en) | 1982-01-20 | 1982-01-20 | piezoelectric sounding body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58109798U JPS58109798U (en) | 1983-07-26 |
| JPS6246395Y2 true JPS6246395Y2 (en) | 1987-12-14 |
Family
ID=30019692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP691582U Granted JPS58109798U (en) | 1982-01-20 | 1982-01-20 | piezoelectric sounding body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58109798U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011228794A (en) * | 2010-04-15 | 2011-11-10 | Nec Corp | Electro-acoustic transducer |
| JP2015186130A (en) * | 2014-03-25 | 2015-10-22 | 京セラ株式会社 | film speaker |
-
1982
- 1982-01-20 JP JP691582U patent/JPS58109798U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58109798U (en) | 1983-07-26 |
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