JPS5834699A - Small-sized thin piezo-electric loudspeaker - Google Patents
Small-sized thin piezo-electric loudspeakerInfo
- Publication number
- JPS5834699A JPS5834699A JP13242781A JP13242781A JPS5834699A JP S5834699 A JPS5834699 A JP S5834699A JP 13242781 A JP13242781 A JP 13242781A JP 13242781 A JP13242781 A JP 13242781A JP S5834699 A JPS5834699 A JP S5834699A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- fixed
- diaphragm
- piezoelectric
- acoustic diaphragm
- 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
- 238000004804 winding Methods 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 239000000696 magnetic material Substances 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims abstract 4
- 239000000463 material Substances 0.000 claims description 17
- 239000002305 electric material Substances 0.000 abstract 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 abstract 1
- 206010052428 Wound Diseases 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 241000270708 Testudinidae Species 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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)
Abstract
Description
【発明の詳細な説明】
従来から音響用スピーカとしては動電形スピーカが用い
られ、帯域、音圧、ダンピングなどの緒特性から充分な
特性が得られていることは周知の通りであるが、動電形
は本質的には電流駆動のため小型ｉ型携帯機器用として
は消費電流が大きく機器の電池寿命の大部分を支配して
いるのが現状である。[Detailed Description of the Invention] Conventionally, electrodynamic speakers have been used as acoustic speakers, and it is well known that they have sufficient characteristics in terms of band, sound pressure, damping, etc. Since the electrodynamic type is essentially current-driven, the current consumption is large for small i-type portable devices, and the current situation is that it dominates most of the device's battery life.
超小型携帯機器用スピーカとしては音圧、帯域はほどほ
どで良いとすると、圧電スピーカが検討されてよいが、
前記機器では電源電圧２〜３ｖ程度であり、圧電スピー
カは本質的に電圧駆動であるために駆動電圧が不足し充
分な音圧が得られず、昇圧しようとすると昇圧トランス
が別に必要となり、その分スペースをとり小型薄型機器
に応用できないという欠点があった。Assuming that moderate sound pressure and bandwidth are sufficient for speakers for ultra-small portable devices, piezoelectric speakers may be considered.
In the above equipment, the power supply voltage is about 2 to 3 V, and piezoelectric speakers are essentially voltage driven, so the drive voltage is insufficient and sufficient sound pressure cannot be obtained. The drawback is that it takes up a lot of space and cannot be applied to small and thin devices.
本発明は圧電スピ４力のスペース効率を上げ、低消費電
力化を図ることを目的としてなされたもので圧電スピー
カの構造に係るものあり、断面が凹状に形成された円形
音響振動板、該音響振動板の外周を固定する磁性材料か
らなるフレーム、フレームに固定される中空円盤状の基
板、該基板に一端が固定される振動板、該振動板の一端
が前記音響振動板の中央部に固定され、圧電材が前記振
動板に固定された円形成いはカンチレノ（−の振動板、
−次及び二次巻線が巻回されたフレーム、二次巻線が圧
電材に接続された構成からなるものである。以下では図
面に基いて本発明を説明する。The present invention was made for the purpose of increasing the space efficiency of piezoelectric speakers and reducing power consumption, and relates to the structure of piezoelectric speakers, including a circular acoustic diaphragm with a concave cross section, A frame made of a magnetic material that fixes the outer periphery of the diaphragm, a hollow disc-shaped substrate fixed to the frame, a diaphragm with one end fixed to the substrate, and one end of the diaphragm fixed to the center of the acoustic diaphragm. and a piezoelectric material is fixed to the diaphragm.
- It consists of a frame around which the primary and secondary windings are wound, and the secondary windings are connected to a piezoelectric material. The present invention will be explained below based on the drawings.
第１図は従来から公知の圧電スピーカの主要断面図を示
す。第２図は本発明の圧電スピーカの主要断面図を示す
。第３図は本発明圧電スピーカのフレームの斜視図を示
す。第４図は本発明圧゛亀スピーカの一次二次巻線の関
係説明図を示す。第５図は本発明圧電スピーカの他の実
施例説明する主要断面図を示す。FIG. 1 shows a main cross-sectional view of a conventionally known piezoelectric speaker. FIG. 2 shows a main cross-sectional view of the piezoelectric speaker of the present invention. FIG. 3 shows a perspective view of the frame of the piezoelectric speaker of the present invention. FIG. 4 shows an explanatory diagram of the relationship between the primary and secondary windings of the pressure tortoise speaker of the present invention. FIG. 5 shows a main sectional view illustrating another embodiment of the piezoelectric speaker of the present invention.
第１図において、１は断面が凹状に形成された例えば合
成樹脂からなる音響振動板、２は中空円盤状のフレーム
、６は基板、６はボス、４はカンチレバー、５はｐｚＴ
ｉどの圧電機、７は音響振動板１の外周部をフレーム２
に固定するキャップである。ボス６は基板乙に固定され
、圧電材５を固定されたカンチレバー４はボス６に固定
支持され、カンチレバーの先端は前記音響振動板１の中
央部に固定される。圧電材５には交番電圧が印加される
。（図は省略）、既に述べたように、圧電スピーカは本
来電圧駆動であるから、低電圧駆動では充分な音圧は得
られない。In FIG. 1, 1 is an acoustic diaphragm made of, for example, synthetic resin and has a concave cross section, 2 is a hollow disc-shaped frame, 6 is a substrate, 6 is a boss, 4 is a cantilever, and 5 is a pzT.
i Which piezoelectric machine 7 connects the outer periphery of the acoustic diaphragm 1 to the frame 2
It is a cap that is fixed to the The boss 6 is fixed to the substrate B, the cantilever 4 to which the piezoelectric material 5 is fixed is fixedly supported by the boss 6, and the tip of the cantilever is fixed to the center of the acoustic diaphragm 1. An alternating voltage is applied to the piezoelectric material 5. (Figures omitted) As already mentioned, since piezoelectric speakers are originally driven by voltage, sufficient sound pressure cannot be obtained with low voltage driving.
第２図は本発明の圧電スピーカであり、同図において、
８は凹状の円形音響振・動板、９は磁性材料からなるフ
レーム、１０は中空円盤状の基板、１６はボス、１１は
カンチレバー、１２は圧電材、１４はフレームに巻回さ
れた二次巻線、１５はフレームに巻回された一次巻線、
１６．１７は入力端子、１８．１９は圧電材の両端に接
続される。FIG. 2 shows a piezoelectric speaker of the present invention, and in the same figure,
8 is a concave circular acoustic vibration plate, 9 is a frame made of magnetic material, 10 is a hollow disc-shaped substrate, 16 is a boss, 11 is a cantilever, 12 is a piezoelectric material, and 14 is a secondary wound around the frame. winding, 15 is a primary winding wound around the frame;
Reference numerals 16 and 17 are input terminals, and 18 and 19 are connected to both ends of the piezoelectric material.
基板１０に固定されたボス１６にカンチレノく−の一端
が固定支持され、カンチレバーの先端は前記音響振動板
８の中央部にし定される。音響振動板８の外周はキャッ
プ２０によってフレーム９の外周に固定される。One end of the cantilever is fixedly supported by a boss 16 fixed to the substrate 10, and the tip of the cantilever is fixed at the center of the acoustic diaphragm 8. The outer periphery of the acoustic diaphragm 8 is fixed to the outer periphery of the frame 9 by a cap 20.
第３図において、磁性材からなるフレーム９には厚み方
向に溝９ａ、９ｂが設けられる。In FIG. 3, a frame 9 made of a magnetic material is provided with grooves 9a and 9b in the thickness direction.
第４図において、二次巻線１４はフレーム９の溝９ａに
、−次巻線１５はフレーム９の溝９ｂに巻回され、二次
巻線１４０両端子１８．１９は圧電材両端の電極に接続
される。１６．１７は音響電気信号電圧の入力端子であ
る。In FIG. 4, the secondary winding 14 is wound in the groove 9a of the frame 9, the -secondary winding 15 is wound in the groove 9b of the frame 9, and both terminals 18 and 19 of the secondary winding 140 are the electrodes at both ends of the piezoelectric material. connected to. 16 and 17 are input terminals for acoustic electrical signal voltage.
第５図において、番号８〜２０までは第２図に準するも
のであるが、ボス２１は中空円盤状に形成され、基板１
０に固定され、２２は円形の金属振動板で前記ボス２１
にその外周部が固定され、円形薄板振動板２２には円形
薄板の圧電材２６が接着固定され、前記振動板の中央部
は音響振動板８の中央部に固定される。二次巻線１４の
両端子は前記圧電材２２の電極の両端に接続される。In FIG. 5, numbers 8 to 20 are similar to those in FIG. 2, but the boss 21 is formed in the shape of a hollow disk, and
0, and 22 is a circular metal diaphragm that connects the boss 21.
A thin circular piezoelectric material 26 is adhesively fixed to the circular thin plate diaphragm 22 , and a central portion of the diaphragm is fixed to the central portion of the acoustic diaphragm 8 . Both terminals of the secondary winding 14 are connected to both ends of the electrodes of the piezoelectric material 22.
また、第２図、第４図において、圧電材はカンチレバー
、域いは円形振動板の片側にのみ固定されているが、こ
れを１対としてそれぞれの振動板の表裏に接着固定し、
これを直並列接続してバイモルフ駆動としてよいことも
明らかである。また−次巻線１５、二次巻線１４の巻線
比、即ち昇圧比は圧電材以後のインピーダンスとのマツ
チングをとりながら２〜５にとって適当な駆動電圧とし
てよいことも明らかである。In addition, in FIGS. 2 and 4, the piezoelectric material is fixed to only one side of the cantilever, area, or circular diaphragm, but this is fixed as a pair to the front and back of each diaphragm,
It is also clear that these may be connected in series and parallel to form a bimorph drive. It is also clear that the winding ratio of the secondary winding 15 and the secondary winding 14, that is, the step-up ratio, may be set to an appropriate driving voltage for 2 to 5 while matching with the impedance after the piezoelectric material.
また、フレーム９は第３図に示すように一体とせず、巻
線部分を別体として予め巻回しておき、その後フレーム
に組み込むことも可能である。Further, the frame 9 may not be integrated as shown in FIG. 3, but the winding portion may be wound separately in advance and then assembled into the frame.
公知例第１図の作用効果は、圧電材５の電極の両端に信
号電圧が印加されると、カンチレバー−４がそれに応じ
て振動し、カンチレノ（−の先端に固定′されている音
響振動板１が振動じて音響出力を前面に放射するもので
ある。低電圧電源２〜３ｖでは余程スピーカの放射面積
を太きくしない限り、電源以上の駆動電圧の大きさは得
られない力為ら、音圧を大きくすることは困難である。The effect of the known example shown in FIG. 1 radiates sound output to the front through vibration.With a low voltage power supply of 2 to 3V, it is impossible to obtain a driving voltage larger than the power supply unless the radiation area of the speaker is made too large. , it is difficult to increase the sound pressure.
また昇圧しようとすると、別に昇圧トラ゛ンスが必要と
なり／ｊ％型携帯機器のスペース効率を悪くする欠点力
；ある。Furthermore, if an attempt is made to boost the voltage, a separate step-up transformer is required, which has the disadvantage of impairing the space efficiency of type portable devices.
第２図、第５図の本発明圧電スピーカでは音響信号電圧
以−次巻線１５の入力端１６．１７に導かれ、フレーム
をかねるトランス９によって二次巻線１４０両端子１８
．１９に予め設定された昇圧比に従って昇圧電圧が生じ
、それカニ圧電材１２または２０の電極の両端に印加さ
れる。In the piezoelectric speaker of the present invention shown in FIGS. 2 and 5, the acoustic signal voltage is guided to the input end 16, 17 of the secondary winding 15, and the secondary winding 140 and both terminals 18 are connected by the transformer 9, which also serves as a frame.
．． A boosted voltage is generated according to a boost ratio set in advance at 19, and is applied to both ends of the electrodes of the crab piezoelectric material 12 or 20.
その結果、音圧は必要な量だけ、また帯域は全体の設計
で定する範囲を満足する′ことができる。As a result, the sound pressure can be reduced to the required amount, and the band can be satisfied within the range determined by the overall design.
本発明によれば、小型携帯機器用のスピーカとして許容
される音圧、帯域を満足する圧電スピー汐を小型薄型化
ができ、しかも低電圧電源低消費電力となし得て、且つ
構造が簡単であるからコストも安く実用効果は顕著であ
る。According to the present invention, a piezoelectric speaker that satisfies the sound pressure and band permissible as a speaker for small portable devices can be made small and thin, and furthermore, it can be made with a low voltage power supply and low power consumption, and has a simple structure. Because of this, the cost is low and the practical effects are remarkable.
また図示していないが、−次入力を中間タップを設けた
３端子としてブシュプル入力とすることも容易に考えら
れる。Although not shown, it is easily possible to configure the negative input as a three-terminal bush-pull input with an intermediate tap.
第１図は従来から公知の圧電スピーカの主要断面図を示
す。第２図は本発明の圧電スピーカの主要断面図を示す
。第３図は本発明圧電スピーカのフレームの斜視図を示
す。第４図は本発明圧電ス要断面図を示す。
１・・・・・・音響振動板 ２・・・・・・中空円盤状
のフレーム６・・・・・・基板 ４・・・・・・カンチ
レバー５・・・・・・圧電材 ６・・・・・・ボス７・
・・・・・音響振動板固定キャップ８・・・・・・音響
振動板 ９・・・・・・磁性材フレーム９ａ、９ｂ・・
・・・・フレーム９の巻線用の溝１０・・・・・・基板
１１・・・・・・カンチレバー１２・・・・・・圧電
材 １６・・・・・・ボス１４・・・・・・二次巻線
１５・・・・・・−次巻線１６．１７・・・・・・−次
巻線ひ入力端子１８．１９・・・・・・二次巻線の出力
端子２０・・・・・・音響振動板の固定キャップ２１・
・・・・・中空円板状のボス
２２・・・・・・円形薄板振動板
２６・・・・・・円形薄板圧電材
第１図
第２図
−シFIG. 1 shows a main cross-sectional view of a conventionally known piezoelectric speaker. FIG. 2 shows a main cross-sectional view of the piezoelectric speaker of the present invention. FIG. 3 shows a perspective view of the frame of the piezoelectric speaker of the present invention. FIG. 4 shows a cross-sectional view of the piezoelectric device of the present invention. 1... Acoustic diaphragm 2... Hollow disc-shaped frame 6... Substrate 4... Cantilever 5... Piezoelectric material 6...・・・Boss 7・
...Acoustic diaphragm fixing cap 8...Acoustic diaphragm 9...Magnetic material frames 9a, 9b...
...Groove for winding of frame 9 10 ... Substrate 11 ... Cantilever 12 ... Piezoelectric material 16 ... Boss 14 ...・Secondary winding
15...--Next winding 16.17...-Next winding input terminal 18.19...Secondary winding output terminal 20... Acoustic diaphragm fixing cap 21・
...Hollow disc-shaped boss 22...Circular thin plate diaphragm 26...Circular thin plate piezoelectric material Fig. 1 Fig. 2-Shi
Claims (1)
動板の外周を固定する磁性材からなるフレーム、フレー
ムに固定される中空円盤状の基板、該基板上に固定され
る励振用振動板、該励振用振動板は少なくとも一面に圧
電材が固着され、かつ一部が前記凹状音響振動板の中央
部に固定されており、前記フレームに一次及び二次巻線
を形成し、該二次巻線を圧電材に接続したことを特徴と
する小型薄型圧電スピーカ。 （２） フレームは少なくとも１個所以上の厚み方向
に設けられた溝を有し、畝溝に一次及び二次巻線を巻回
したことを特徴とする特許請求の範囲第１項記載の小型
薄型圧電スピーカ。[Claims] +1) A circular acoustic diaphragm formed in a concave shape, a frame made of a magnetic material that fixes the outer periphery of the acoustic diaphragm, a hollow disk-shaped substrate fixed to the frame, and a hollow disc-shaped substrate fixed on the substrate. an excitation diaphragm, the excitation diaphragm has a piezoelectric material fixed to at least one surface, a part of which is fixed to the center of the concave acoustic diaphragm, and primary and secondary windings are formed on the frame; A small thin piezoelectric speaker characterized in that the secondary winding is connected to a piezoelectric material. (2) The small and thin frame according to claim 1, characterized in that the frame has at least one groove provided in the thickness direction, and the primary and secondary windings are wound in the ridge groove. piezoelectric speaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13242781A JPS5834699A (en) | 1981-08-24 | 1981-08-24 | Small-sized thin piezo-electric loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13242781A JPS5834699A (en) | 1981-08-24 | 1981-08-24 | Small-sized thin piezo-electric loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5834699A true JPS5834699A (en) | 1983-03-01 |
Family
ID=15081115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13242781A Pending JPS5834699A (en) | 1981-08-24 | 1981-08-24 | Small-sized thin piezo-electric loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834699A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6140100U (en) * | 1984-08-16 | 1986-03-13 | オンキヨー株式会社 | Piezoelectric speaker assembly structure |
| JPS625798U (en) * | 1985-06-25 | 1987-01-14 | ||
| US6718040B1 (en) * | 1999-06-18 | 2004-04-06 | Murata Manufacturing Co., Ltd. | Transformer, loudspeaker device, loudspeaker network, and loudspeaker system |
| JP2007195239A (en) * | 2000-01-07 | 2007-08-02 | Unison Products Inc | Mechanical-to-acoustical transformer and multimedia flat film speaker |
-
1981
- 1981-08-24 JP JP13242781A patent/JPS5834699A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6140100U (en) * | 1984-08-16 | 1986-03-13 | オンキヨー株式会社 | Piezoelectric speaker assembly structure |
| JPS625798U (en) * | 1985-06-25 | 1987-01-14 | ||
| US6718040B1 (en) * | 1999-06-18 | 2004-04-06 | Murata Manufacturing Co., Ltd. | Transformer, loudspeaker device, loudspeaker network, and loudspeaker system |
| JP2007195239A (en) * | 2000-01-07 | 2007-08-02 | Unison Products Inc | Mechanical-to-acoustical transformer and multimedia flat film speaker |
| JP2012134998A (en) * | 2000-01-07 | 2012-07-12 | Emo Labs Inc | Mechanical-to-acoustical converter and multimedia flat film speaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6133434B2 (en) | ||
| JP3514619B2 (en) | Speaker device | |
| US10993031B2 (en) | Transducer vibrating diaphragm structure, flat panel speaker and earphone therewith | |
| JP3213521B2 (en) | Electroacoustic transducer | |
| JPS5834699A (en) | Small-sized thin piezo-electric loudspeaker | |
| CN208971789U (en) | A kind of miniature plate speaker transducer diaphragm structure | |
| US3588381A (en) | Transducer having spaced apart oppositely flexing piezoelectric members | |
| JPS59139799A (en) | Flat speaker | |
| US12003938B2 (en) | Speaker | |
| CN109951773A (en) | Ultralow frequency double resonance loudspeaker and preparation method thereof | |
| JP2558667B2 (en) | Rectangular flat speaker | |
| JPS6246395Y2 (en) | ||
| CN208971797U (en) | A kind of miniature plate speaker transducer diaphragm structure | |
| CN209089218U (en) | A kind of earplug with miniature plate diaphragm for transducer structure of loudspeaker | |
| CN112887865B (en) | Wireless earphone | |
| CN208971798U (en) | A kind of miniature plate speaker transducer diaphragm structure | |
| CN209072725U (en) | A kind of loudspeaker with miniature plate diaphragm for transducer structure | |
| JPH0136315B2 (en) | ||
| JPS60171900A (en) | Speaker | |
| JPS6321400B2 (en) | ||
| CN205726406U (en) | Moving-coil Piezoelectric anisotropy speaker | |
| JPS5825440Y2 (en) | Buzzer | |
| JPS603278B2 (en) | piezoelectric speaker | |
| JPS58147300A (en) | Construction of very thin speaker | |
| JPH0290899A (en) | Electrodynamic speaker |