JPS5814699A - Piezoelectric loudspeaker - Google Patents
Piezoelectric loudspeakerInfo
- Publication number
- JPS5814699A JPS5814699A JP11383581A JP11383581A JPS5814699A JP S5814699 A JPS5814699 A JP S5814699A JP 11383581 A JP11383581 A JP 11383581A JP 11383581 A JP11383581 A JP 11383581A JP S5814699 A JPS5814699 A JP S5814699A
- Authority
- JP
- Japan
- Prior art keywords
- oscillator
- vibration
- piezoelectric
- liquid
- movable member
- 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
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H04R17/02—Microphones
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】
本発明は圧電振動子な駆動源として用いた圧電型スピー
カに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piezoelectric speaker using a piezoelectric vibrator as a drive source.
第１図に従来の圧電型スピーカを示す、同図に於いて、
（１）は円板状の圧電振動子であり、電気信号が印加さ
れると同心状の節円を形成して屈曲振動するものである
。（２１は有底フレームであり、該有底フレーム（２）
の底部内園にモルトブレン等の柔軟性物質層（３）を介
して上記圧電振動子（１）が柔軟に保持されている。（
４）は円錐型のコーン紙であり、その頂部が円板状の上
記圧電振動子の中央に接着結合され、その周囲が上ε有
底フレーム（２）の開口辺に係止されている。Figure 1 shows a conventional piezoelectric speaker.
(1) is a disk-shaped piezoelectric vibrator, which bends and vibrates by forming concentric nodal circles when an electric signal is applied. (21 is a bottomed frame, and the bottomed frame (2)
The above-mentioned piezoelectric vibrator (1) is flexibly held in the inner bottom part of the vibrator via a flexible material layer (3) such as maltbrene. (
4) is a cone-shaped paper cone, the top of which is adhesively bonded to the center of the disk-shaped piezoelectric vibrator, and the periphery thereof is locked to the opening side of the upper ε-bottomed frame (2).
斯様な従来の圧電型スピーカは音響信号が印加され屈曲
振動している圧電振動子の中央部の変位に依って、コー
ン紙（４３が駆動されるので、このコーン紙（４）の振
巾は、黄銅薄板に圧電祠料鼾な貼り合せてなるこの種圧
電振動子の構造から制約されたものとなっている。この
為、大振中を必要とする中、低音域は再生されずに、高
音域のみが高い音圧で再生される事になり、この種圧電
型スピーカはもっばら高音域用スピーカとしてのみ使用
されていた。し力ζしながら、斯る圧電型スピーカは磁
気回路とボイスコイルを用いたスピーカに比べて１部品
点数が少ない、製造コストが低い、消費電力が小さい、
磁気的影響が無い等の優れた特徴を備えているので、中
、低音域用としての圧電型スピーカの開発が望まれてい
る。In such a conventional piezoelectric speaker, the paper cone (43) is driven by the displacement of the central part of the piezoelectric vibrator which is bending and vibrating when an acoustic signal is applied, so the width of the paper cone (4) is is limited by the structure of this type of piezoelectric vibrator, which is made by pasting a piezoelectric abrasive material on a thin brass plate.For this reason, even when large vibrations are required, low frequencies are not reproduced. , only the high frequency range was reproduced with high sound pressure, and this type of piezoelectric speaker was used only as a high frequency speaker. Compared to speakers using voice coils, there are fewer parts, lower manufacturing costs, and lower power consumption.
Since it has excellent characteristics such as no magnetic influence, it is desired to develop a piezoelectric speaker for medium and low frequency ranges.
本発明は斯様な現状：二鑑みて為されたものであり、圧
電振動子の振動振巾を大振巾に変換する機能を備えた圧
電型スピーカを提供するものである。The present invention was made in view of the current situation, and provides a piezoelectric speaker having a function of converting the vibration amplitude of a piezoelectric vibrator into a large amplitude.
本発明の圧電型スピーカＶ第２図に示す、同図に於いて
、（５）は円板状の圧電振動子であり、ＩＥ気傷信号印
加されると円心状の節円を形成して屈曲振動するもので
ある。 ＋６）は円筒体であって、その直径は上記円板
状の圧゛罐振動子（１）の直径の略０，６８脩、即ち節
円の直径と等しいものであり、この円筒体（６）の下端
開口部が上記圧電振動子（１）の節円位置に密着されて
いる。（７）は椀状のフレームであって、その底部（８
）が上記円筒体（６）の上端開口部に嵌り込んでこの開
口を覆蓋している。（９）は該フレーム（７）の底部（
８）中央の透孔に取り付けられたドーム状の可動部材で
あり、伸縮性を有するゴム薄膜に依り″ｃ部成されてい
る。ｕＱは上記圧電振動子（５）。Piezoelectric speaker V of the present invention is shown in FIG. 2. In the same figure, (5) is a disc-shaped piezoelectric vibrator, which forms a central nodal circle when an IE signal is applied. It causes bending vibration. +6) is a cylindrical body whose diameter is approximately 0.68 mm of the diameter of the disk-shaped pressure can vibrator (1), that is, equal to the diameter of the nodal circle. ) is in close contact with the nodal position of the piezoelectric vibrator (1). (7) is a bowl-shaped frame, and its bottom (8
) fits into the upper end opening of the cylindrical body (6) and covers this opening. (9) is the bottom of the frame (7) (
8) It is a dome-shaped movable member attached to the central through hole, and the "c" portion is made of a thin elastic rubber film. uQ is the piezoelectric vibrator (5).
円筒体（６）、フレーム（７）の底部（８）、及び可動
部材０υ。The cylinder (6), the bottom (8) of the frame (7), and the movable member 0υ.
に依って形成される■室に充填された液体であり、例え
ば水が用いられる。 （１１１は円錐型のコーン紙であ
り、その頂部は上記ドーム状の可動部材（９）の頂部と
結合され、その８曲は上記椀状のフレーム（７）の開口
辺に係止されている。１ハｉは上記フレーム（７）のｉ
ｕｊに取り付けられた端子板であり、これ等端子板Ｑ；
ａα４の端子（１３１（１１と上記圧電振動棗子（５）
の両電極とがフレキシブルワイヤ住引４に依って連結さ
れている。It is a liquid that fills the chamber formed by the method, and water is used, for example. (111 is a conical paper cone, the top of which is connected to the top of the dome-shaped movable member (9), and its eight pieces are locked to the opening side of the bowl-shaped frame (7). .1 high i is i of the above frame (7)
These are the terminal boards Q;
aα4 terminal (131 (11) and the piezoelectric vibrating cup (5)
Both electrodes are connected by a flexible wire wire 4.
斯る圧゛磁型スピーカは、上記圧填振動子（５）と。Such a pressure-magnetic speaker includes the pressure-filled vibrator (5).
円筒体（６）と、１１体を形成するフレーム（７）の底
部（８）と、可動部材（９）と、これ等に依って形成さ
れた密室内ζ二充填された液体ｄｉと、から駆動部が形
成されており１両−子（１３（Ｌ３（−入力された音響
信号が圧電振動子（５０ニ印加されると、この圧°岨振
動子（５）は円筒体（６）の関口部と結合した節円位Ｋ
を支点として屈曲振動するので、この振動砿二応じて、
液体Ｏ１を介して可ａｍ材（９）に圧力が加えられる。From the cylindrical body (6), the bottom (8) of the frame (7) forming the 11th body, the movable member (9), and the liquid di filled in the closed chamber ζ2 formed by these. A driving part is formed, and when the input acoustic signal is applied to the piezoelectric vibrator (50), this piezoelectric vibrator (5) is activated by the cylindrical body (6). Nodal point K connected to Sekiguchi part
Since it bends and vibrates using the fulcrum, depending on this vibration,
Pressure is applied to the flexible material (9) via the liquid O1.
これに依って、可動部材（９）は伸縮運動する事になる
が。This causes the movable member (9) to expand and contract.
このドーム状の可動部材（９）の表面積とこの可動部材
（９）の頂部の変位量との積が、円筒体（６）の断面積
と圧電振動子（５）の変位量との積に、略等しくなるの
で１例えば上記可動部材（９）の表面積を円筒体（６）
の断面積のに程度に設定しておけば、 ｉ＋］動部祠（
９）の頂部の変位量は圧電振動子のそれの４倍となる。The product of the surface area of this dome-shaped movable member (9) and the amount of displacement of the top of this movable member (9) is the product of the cross-sectional area of the cylindrical body (6) and the amount of displacement of the piezoelectric vibrator (5). , are approximately equal, so 1For example, the surface area of the movable member (9) is the surface area of the cylindrical body (6).
If you set it to about the cross-sectional area of
The amount of displacement at the top of 9) is four times that of the piezoelectric vibrator.
従って、この駆動部の可動部材（９）の振巾は圧電振動
子の振巾な増巾したものとなり、この可動部材（９）の
頂部に結合しているコーン紙ａυが大振巾で駆動される
。Therefore, the amplitude of the movable member (9) of this driving section is increased by the amplitude of the piezoelectric vibrator, and the cone paper aυ connected to the top of this movable member (9) is driven with a large amplitude. be done.
第６図に本発明の圧電型スピーカの周波数特性曲線を実
線で示し、従来の圧’７４型スピーカのそれを破線で示
す。斯る特性を示す本発明圧電型スピーカは１円板状の
圧電振動子の直径が２１誠１円筒体の断面内径が１４
” １．ｗ体であるフレームの底部に設けられた透孔の
内径、即ちＶ−ム状の可動部材の外径が３１ＩＩ１．コ
ーン紙の外径が４０■に設定されたものであり、従来品
はこれと同様の圧電４Ｍ動子とコーン紙な用いたもので
ある。同図に・依れば本発明スピーカの振動板であるコ
ーン紙が従来品のそれＣ二比べて大振巾駆動される為書
＝、高音域の背圧が低下して、中低音域の背圧が同上し
１−シー゛１
ている事明らかである。In FIG. 6, the frequency characteristic curve of the piezoelectric type speaker of the present invention is shown by a solid line, and that of the conventional piezoelectric type speaker is shown by a broken line. The piezoelectric speaker of the present invention exhibiting such characteristics has a disc-shaped piezoelectric vibrator with a diameter of 21 mm, and a cylindrical body with a cross-sectional inner diameter of 14 mm.
1. The inner diameter of the through hole provided at the bottom of the W-shaped frame, that is, the outer diameter of the V-shaped movable member, is set to 31II. The product uses a piezoelectric 4M actuator similar to this one and a cone paper.As shown in the figure, the cone paper that is the diaphragm of the speaker of the present invention has a larger amplitude drive than the conventional product C2. It is clear that the back pressure in the treble range has decreased and the back pressure in the middle and low range has been reduced to the same level as above.
＾
本発明の圧電型スピーカは以上の説明から明らかな如く
、圧電振動子の振動を密閉された液体を介して可動部材
に伝達する事に依り該可動部材の振動は圧電振動子、振
動を増巾したものとなるので。^ As is clear from the above description, the piezoelectric speaker of the present invention transmits the vibration of the piezoelectric vibrator to the movable member via the sealed liquid, so that the vibration of the movable member increases the vibration of the piezoelectric vibrator. Because it will be wide.
この可動部材Ｃ：結合した振動板を大振中で駆動せしめ
る事が可能となり、中・低音域での再生音圧の同上が計
れる。従って、中・低音域用の圧電型スピーカが実温で
きる。This movable member C: It is possible to drive the coupled diaphragm during large vibrations, and the same reproduction sound pressure in the middle and low frequency ranges can be measured. Therefore, piezoelectric speakers for medium and low frequency ranges can be produced at actual temperatures.
第１図は従来の圧電型スピーカの断面図、第２図は本発
明の圧電型スピーカの断面図、第３図は周波数特性曲線
図、であり、（１）（５）は圧電振動子。FIG. 1 is a sectional view of a conventional piezoelectric speaker, FIG. 2 is a sectional view of a piezoelectric speaker of the present invention, and FIG. 3 is a frequency characteristic curve diagram. (1) and (5) are piezoelectric vibrators.
Claims (1)
置にその一端の開口が当接して密閉される筒体と、該筒
体の他端を覆蓋する蓋体と、該蓋体の一部に形成された
透孔に振動可能な状態で取り付けられた可動部材と、上
紀圧４Ｅ振動子、筒体。 蓋体、及び可動部材に依って形成される密室に充填され
た液体と、からなる駆動部な備え、この駆動部の圧電振
動子の振動亀＝連動する可動部材に振動板を結合した事
を特徴とする圧電型スピーカ。[Claims] 1) A plate-shaped piezoelectric vibrator, a cylinder whose one end is sealed by abutting an opening at a substantially nodal position of the plate-shaped piezoelectric vibrator, and a cylinder whose other end is sealed. A lid for covering, a movable member attached to a through hole formed in a part of the lid so as to be able to vibrate, a 4E oscillator, and a cylindrical body. A driving part is provided, which consists of a liquid filled in a closed chamber formed by a lid body and a movable member, and a vibration plate is coupled to the interlocking movable member. Features a piezoelectric speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11383581A JPS5814699A (en) | 1981-07-20 | 1981-07-20 | Piezoelectric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11383581A JPS5814699A (en) | 1981-07-20 | 1981-07-20 | Piezoelectric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5814699A true JPS5814699A (en) | 1983-01-27 |
Family
ID=14622233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11383581A Pending JPS5814699A (en) | 1981-07-20 | 1981-07-20 | Piezoelectric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6174096A (en) * | 1984-09-18 | 1986-04-16 | 富士通株式会社 | Electronic type cash register/processor |
-
1981
- 1981-07-20 JP JP11383581A patent/JPS5814699A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6174096A (en) * | 1984-09-18 | 1986-04-16 | 富士通株式会社 | Electronic type cash register/processor |
| JPH028358B2 (en) * | 1984-09-18 | 1990-02-23 | Fujitsu Ltd |
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