JPH0126239B2 - - Google Patents
Info
- Publication number
- JPH0126239B2 JPH0126239B2 JP6995784A JP6995784A JPH0126239B2 JP H0126239 B2 JPH0126239 B2 JP H0126239B2 JP 6995784 A JP6995784 A JP 6995784A JP 6995784 A JP6995784 A JP 6995784A JP H0126239 B2 JPH0126239 B2 JP H0126239B2
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- piezoelectric
- element disk
- disk
- cone
- 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
- 239000002184 metal Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、一般オーデイオに幅広く利用され
る、高音用スピーカやマイクロホン等の圧電形電
気音響変換器に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a piezoelectric electroacoustic transducer for high-frequency speakers, microphones, etc., which is widely used in general audio.
（従来例の構成とその問題点）
最近の一般オーデイオ業界では、例えば高音用
スピーカを例に取れば、帯域分割用の低域阻止フ
イルタを必要としない圧電形高音用スピーカがコ
スト低減の目的で採用されてきている。(Conventional configuration and its problems) Recently, in the general audio industry, taking high-frequency speakers as an example, piezoelectric high-frequency speakers that do not require a low-frequency rejection filter for band division are being used for cost reduction purposes. It is being adopted.
第１図は従来の高音用圧電スピーカの一例の断
面構成を示すもので、１は圧電素子円板であつて
中間電極を挿入したバイモルフタイプのものが多
く、２は振動自在にするための柔軟性に富むクツ
シヨン材、３は圧電素子の電極リード線で、ここ
から電気信号電流を供給し、４は金属薄板や樹脂
で構成されるフレーム、５は紙や軽金属箔で構成
されるコーン状振動板で、その下端頂点６は接着
等の手段により圧電素子円板１に固着され、開口
上方はフレーム４に接着されてその上方は紙等で
構成されるガスケツト７が固着される。 Figure 1 shows the cross-sectional configuration of an example of a conventional piezoelectric speaker for high-pitched sounds. 1 is a piezoelectric element disk, which is often a bimorph type with an intermediate electrode inserted, and 2 is a flexible piezoelectric speaker for free vibration. 3 is the electrode lead wire of the piezoelectric element from which an electrical signal current is supplied, 4 is the frame made of thin metal plate or resin, and 5 is the cone-shaped vibration made of paper or light metal foil. The lower apex 6 of the plate is fixed to the piezoelectric element disk 1 by means of adhesive or the like, the upper part of the opening is glued to the frame 4, and the gasket 7 made of paper or the like is fixed above it.
このような従来の構成による高音用圧電スピー
カではコーン状振動板５の頂点６の一点のみの駆
動であるため、圧電素子円板１の第１共振周波数
付近で周波数特性に大きなピークを生じるだけ
で、それ以外の周波数の再生能率は低く、結果と
して非常に再生帯域の狭いスピーカであり、高性
能化は困難であるという欠点がある。 In a high-pitched piezoelectric speaker with such a conventional configuration, only one point of the apex 6 of the cone-shaped diaphragm 5 is driven, so a large peak only occurs in the frequency characteristics near the first resonance frequency of the piezoelectric element disk 1. , the reproduction efficiency of other frequencies is low, resulting in a speaker with a very narrow reproduction band, which has the disadvantage that it is difficult to improve its performance.
第２図は、従来の高音用圧電スピーカの周波数
特性の例を示している。 FIG. 2 shows an example of the frequency characteristics of a conventional high-pitched piezoelectric speaker.
（発明の目的）
本発明は以上のような従来の欠点を除去し、広
帯域にわたり、一様な再生を可能とする圧電形電
気音響変換器を提供することを目的とするもので
ある。(Object of the Invention) An object of the present invention is to provide a piezoelectric electroacoustic transducer that eliminates the above-mentioned conventional drawbacks and enables uniform reproduction over a wide band.
（発明の構成）
上記目的を達成するために、本発明は、圧電素
子円板よりなる変換素子と、その圧電素子円板の
第１共振周波数の節を長径とし、第２共振周波数
の節を短径とする正楕円又は略楕円形状の底部を
有する紙または軽金属箔よりなるコーン状振動板
とを有し、その振動板の楕円状の底部を前記圧電
素子円板に固着して一体とし、前記圧電素子円板
を電気信号により駆動することにより音響信号を
発音させ、または前記振動板に音波を加えること
により圧電素子円板から電気信号を得る構成とし
たものである。(Structure of the Invention) In order to achieve the above object, the present invention includes a conversion element made of a piezoelectric disk, a node at the first resonance frequency of the piezoelectric disk, and a node at the second resonance frequency. and a cone-shaped diaphragm made of paper or light metal foil having a regular elliptical or substantially elliptical bottom with a short axis, and the elliptical bottom of the diaphragm is fixed to the piezoelectric element disk so as to be integrated, The structure is such that an acoustic signal is generated by driving the piezoelectric element disk with an electric signal, or an electric signal is obtained from the piezoelectric element disk by applying a sound wave to the diaphragm.
（実施例の説明）
第３図ａ及びｂは本発明による圧電形電気音響
変換器の一実施例の構成を示すもので、ａは垂直
断面図、ｂは平面図である。(Description of the Embodiment) FIGS. 3a and 3b show the structure of an embodiment of the piezoelectric electroacoustic transducer according to the present invention, in which a is a vertical sectional view and b is a plan view.
図中、１は圧電素子円板、２は柔軟性を有する
クツシヨン材、３は圧電素子の電極リード線、４
はフレームで、ここまでの構成は第１図に示した
従来のものと全く変らない。８はコーン状振動板
５′のコーンの長径部、９はコーンの短径部、１
０はコーンの底部を示し、長径側の底部１０−１
は圧電素子円板１の１共振周波数の節径を、また
短径側の底部１０−２は第２共振周波数の節径
を、それぞれ楕円の長径及び短径とする正楕円ま
たは略楕円を形成し、圧電素子円板１とコーンの
底部１０との間は線的または面的に接着等の手段
により固着する。 In the figure, 1 is a piezoelectric element disk, 2 is a flexible cushion material, 3 is an electrode lead wire of the piezoelectric element, and 4 is a piezoelectric element disk.
is a frame, and the configuration up to this point is completely unchanged from the conventional one shown in FIG. 8 is the long diameter part of the cone of the cone-shaped diaphragm 5', 9 is the short diameter part of the cone, 1
0 indicates the bottom of the cone, and the bottom 10-1 on the long diameter side
forms a regular ellipse or a substantially ellipse whose major axis and minor axis are the nodal diameter of one resonance frequency of the piezoelectric element disk 1, and the short axis side bottom part 10-2 is the nodal diameter of the second resonance frequency, respectively. However, the piezoelectric element disk 1 and the bottom part 10 of the cone are fixed linearly or planarly by means such as adhesive.
このように、圧電素子円板１とコーン状振動板
５′のコーンの底部１０とを、圧電素子の第１及
び第２の共振周波数の節位置を用いて結合させる
ため、共振モードが分散される。 In this way, the piezoelectric element disk 1 and the cone bottom 10 of the cone-shaped diaphragm 5' are coupled using the node positions of the first and second resonance frequencies of the piezoelectric element, so that the resonance mode is dispersed. Ru.
第４図は本発明による高音用圧電スピーカの周
波数特性の一例を示すもので、第２図に示した従
来の例と比較して一様な音圧の得られる帯域が広
がつていることを示している。 Figure 4 shows an example of the frequency characteristics of the high-pitched piezoelectric speaker according to the present invention, and it can be seen that the band in which a uniform sound pressure can be obtained has expanded compared to the conventional example shown in Figure 2. It shows.
（発明の効果）
以上説明したように、本発明によれば、圧電素
子とコーン状振動板とを、圧電素子の第１及び第
２の共振周波数の節位置を用いて結合することに
より、共振モードが分散され、従来の中心のみの
駆動に比し、より広い帯域にわたり一様の再生レ
スポンスが得られ、また、この性能は全く同じ理
由により、マイクロホンとして利用した時も同様
の効果が期待できる。このように、本発明は構造
を大幅に変えることなく、従つて、コストアツプ
は殆んど無しで、より高性能再生可能な実用的価
値の大なる電気音響変換器を得ることができる利
点がある。(Effects of the Invention) As explained above, according to the present invention, by coupling the piezoelectric element and the cone-shaped diaphragm using the node positions of the first and second resonance frequencies of the piezoelectric element, resonance can be achieved. The mode is dispersed, and a uniform playback response can be obtained over a wider band compared to the conventional center-only drive.Also, for the same reason, the same effect can be expected when used as a microphone. . As described above, the present invention has the advantage that it is possible to obtain an electroacoustic transducer that can reproduce higher performance and has great practical value without significantly changing the structure and, therefore, with almost no increase in cost. .
第１図は従来の高音用圧電スピーカの一例の断
面構成を示す図、第２図は従来の高音用圧電スピ
ーカの周波数特性図、第３図は本発明による圧電
形電気音響変換器の一実施例の構成を示す図、第
４図は本発明による高音用圧電スピーカの周波数
特性の一例を示す図である。
１……圧電素子円板、２……クツシヨン材、３
……圧電素子の電極リード線、４……フレーム、
５，５′……コーン状振動板、６……頂点、７…
…ガスケツト、８……コーンの長径部、９……コ
ーンの短径側、１０……コーンの底部。
Fig. 1 is a diagram showing a cross-sectional configuration of an example of a conventional piezoelectric speaker for high-pitched sounds, Fig. 2 is a frequency characteristic diagram of a conventional piezoelectric speaker for high-pitched sounds, and Fig. 3 is an embodiment of a piezoelectric electroacoustic transducer according to the present invention. FIG. 4 is a diagram showing an example of the configuration of an example, and FIG. 4 is a diagram showing an example of the frequency characteristics of the high-pitched piezoelectric speaker according to the present invention. 1...Piezoelectric element disk, 2...Cushion material, 3
...Piezoelectric element electrode lead wire, 4...Frame,
5, 5'... Cone-shaped diaphragm, 6... Apex, 7...
...Gasket, 8...Longer diameter part of cone, 9... Shorter diameter side of cone, 10... Bottom of cone.
Claims (1)
素子円板の第１共振周波数の節を長径とし、第２
共振周波数の節を短径とする正楕円又は略楕円形
状の底部を有する紙または軽金属箔よりなるコー
ン状振動板とを有し、その振動板の楕円状の底部
を前記圧電素子円板に固着して一体とし、前記圧
電素子円板を電気信号により駆動することにより
音響信号を発音させ、または前記振動板に音波を
加えることにより圧電素子円板から電気信号を得
るようにしたことを特徴とする圧電形電気音響変
換器。1 A conversion element consisting of a piezoelectric element disk, the node of the first resonance frequency of the piezoelectric element disk being the major axis, and the second
and a cone-shaped diaphragm made of paper or light metal foil having a regular elliptical or substantially elliptical bottom with the minor axis being the node of the resonant frequency, and the elliptical bottom of the diaphragm is fixed to the piezoelectric element disk. The piezoelectric element disk is integrated with the piezoelectric element disk, and an acoustic signal is generated by driving the piezoelectric element disk with an electric signal, or an electric signal is obtained from the piezoelectric element disk by applying a sound wave to the diaphragm. A piezoelectric electroacoustic transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6995784A JPS60214200A (en) | 1984-04-10 | 1984-04-10 | Piezoelectric electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6995784A JPS60214200A (en) | 1984-04-10 | 1984-04-10 | Piezoelectric electroacoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60214200A JPS60214200A (en) | 1985-10-26 |
| JPH0126239B2 true JPH0126239B2 (en) | 1989-05-23 |
Family
ID=13417639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6995784A Granted JPS60214200A (en) | 1984-04-10 | 1984-04-10 | Piezoelectric electroacoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60214200A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0416558Y2 (en) * | 1986-09-16 | 1992-04-14 | ||
| JPH01227600A (en) * | 1988-03-07 | 1989-09-11 | Matsushita Electric Ind Co Ltd | Piezo-oscillator |
| TW511391B (en) * | 2000-01-24 | 2002-11-21 | New Transducers Ltd | Transducer |
-
1984
- 1984-04-10 JP JP6995784A patent/JPS60214200A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60214200A (en) | 1985-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6132879B2 (en) | ||
| JPS5911237B2 (en) | piezoelectric speaker | |
| US4048454A (en) | Sonic transducer employing rigid radiating member | |
| JPH0126239B2 (en) | ||
| JPS59146296A (en) | Driving method of piezoelectric speaker | |
| JP3794872B2 (en) | Piezoelectric speaker | |
| JPS63176098A (en) | Compound speaker | |
| JPH10322795A (en) | Speaker device | |
| JPS5912700A (en) | Composite type speaker | |
| JPS6027300A (en) | Piezoelectric oscillator and composite speaker having this piezoelectric oscillator | |
| JPS605680Y2 (en) | flat speaker | |
| JPH0413916Y2 (en) | ||
| JP4015565B2 (en) | Ultra high frequency playback speaker | |
| JPS61121700A (en) | Flat plate diaphragm | |
| JPS636957Y2 (en) | ||
| JPH11164393A (en) | Loudspeaker | |
| JPH10164691A (en) | Loudspeaker | |
| JPH1066193A (en) | Speaker and speaker unit using it | |
| JPH10294986A (en) | Speaker | |
| JPH0554320B2 (en) | ||
| JPH0332157Y2 (en) | ||
| JPH0332158Y2 (en) | ||
| JPS6024058Y2 (en) | piezoelectric speaker | |
| JPS6342636Y2 (en) | ||
| TW202337230A (en) | High pitch enhanced passive radiator and passive radiator speaker having the same |