JPS61121699A - Piezo-electric speaker - Google Patents
Piezo-electric speakerInfo
- Publication number
- JPS61121699A JPS61121699A JP24378084A JP24378084A JPS61121699A JP S61121699 A JPS61121699 A JP S61121699A JP 24378084 A JP24378084 A JP 24378084A JP 24378084 A JP24378084 A JP 24378084A JP S61121699 A JPS61121699 A JP S61121699A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric element
- piezo
- thin film
- polybutadiene
- metallic thin
- 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.)
- Granted
Links
- 239000010409 thin film Substances 0.000 claims abstract description 17
- 229920002589 poly(vinylethylene) polymer Polymers 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 229920000728 polyester Polymers 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000005060 rubber Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 241000218202 Coptis Species 0.000 description 3
- 235000002991 Coptis groenlandica Nutrition 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000012985 polymerization agent Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood 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】
産業上の利用分野
本発明はカセットテープレコーダ、マイクロカセットテ
ープレコーダ等の音響出力機器として用いられる圧電ス
ピーカに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a piezoelectric speaker used as an audio output device such as a cassette tape recorder or a micro cassette tape recorder.
１ 従来の技術
近年、カセットテープレコーダ、マイクロカセットテー
プレコーダの業界においては機器自体の軽量化、Ｒ型化
、小型化を志向する傾向にあり、機器の携帯化がおしす
すめられている。これに伴ない音響出力機器としてのス
ピーカも軽量化、Ｒ型化、小型化を志向する傾向にあり
、従来のダイナミック型スピーカに代わり圧電スピーカ
が用イられるようになってきた。1. Prior Art In recent years, in the cassette tape recorder and micro cassette tape recorder industries, there has been a trend toward lighter weight, R-shaped, and smaller equipment, and the portable equipment has been encouraged. Along with this trend, speakers as sound output devices are also becoming lighter, more R-shaped, and smaller, and piezoelectric speakers have come to be used in place of conventional dynamic speakers.
また、音響特性においても、従来よりもさらに出力音圧
、歪率、平坦性に優れた圧電スピーカが望まれている。Furthermore, in terms of acoustic characteristics, piezoelectric speakers are desired that have even better output sound pressure, distortion rate, and flatness than conventional ones.
以下図面を参照しながら、上述した従来の圧電スピーカ
の例について説明する。An example of the conventional piezoelectric speaker mentioned above will be described below with reference to the drawings.
第３図は従来の圧電スピーカの断面図を示すものである
。第３図において、１は圧電素子、２は金属薄膜、３は
圧電素子１と金用薄膜２を貼り合わせてなる圧電素子エ
レメント、４はフレーム、５．６は入力電圧を印加する
だめの金糸線である。FIG. 3 shows a cross-sectional view of a conventional piezoelectric speaker. In Fig. 3, 1 is a piezoelectric element, 2 is a metal thin film, 3 is a piezoelectric element made by bonding the piezoelectric element 1 and the gold thin film 2, 4 is a frame, and 5.6 is a gold thread for applying input voltage. It is a line.
以上のように構成された圧電スピーカについて、以下そ
の動作について説明する。The operation of the piezoelectric speaker configured as above will be described below.
一般に、薄い円板圧電素子に交流電圧を印加すると、圧
電素子は最低時の共振周波数では、径方向に振動する。Generally, when an alternating current voltage is applied to a thin disc piezoelectric element, the piezoelectric element vibrates in the radial direction at the lowest resonance frequency.
このとき円板圧電素子の直径はわずかに伸びたり、縮ん
だりする。従ってこの圧電素子１と金属薄膜２を貼り合
わせ圧電素子エレメント３を構成すると、圧電素子１が
接着されているため、全体としての圧電素子エレメント
３ではたわみ振動になる。圧電素子１側をマイナスとし
た圧電素子エレメント３に正電圧が印加された場合には
、圧電素子１が伸び、圧電素子１側が凸状にそる。負電
圧が印加された場合は圧電素子エレメント３は縮み、圧
電素子１ （１１１１が凹状にそる。もし、印加交流信
号が２曲の周波数であると圧電素子エレメントは２曲で
振動し、その結果、空気を押し出し、２曲の音が発生す
る。At this time, the diameter of the disc piezoelectric element expands or contracts slightly. Therefore, when piezoelectric element 3 is constructed by bonding piezoelectric element 1 and metal thin film 2 together, since piezoelectric element 1 is bonded, piezoelectric element 3 as a whole undergoes flexural vibration. When a positive voltage is applied to the piezoelectric element 3 with the negative voltage on the piezoelectric element 1 side, the piezoelectric element 1 expands and the piezoelectric element 1 side warps in a convex shape. When a negative voltage is applied, piezoelectric element 3 contracts, and piezoelectric element 1 (1111) warps in a concave shape.If the applied AC signal has two frequencies, the piezoelectric element vibrates at two frequencies, and as a result , pushing out the air and producing two sounds.
発明が解決しようとする問題点
しかしながら、上記のような構成ではこの圧電スピーカ
を音響機器等に取付けた場合、圧電素子１の振動がフレ
ーム４に伝わり異常音を発生させ、音質上問題があった
。また、圧電スピーカの動作原理が上述の圧電素子１の
伸縮振動を用いているため圧電素子１自体の振動のＱ値
（尖鋭度）が直接音響特性に影響を与え、音圧−周波数
特性上鋭い山谷を生じ、必ずしも良好な音響特性を得る
ことができなかった。Problems to be Solved by the Invention However, with the above configuration, when this piezoelectric speaker is attached to an audio device, etc., the vibration of the piezoelectric element 1 is transmitted to the frame 4 and generates an abnormal sound, causing a problem in sound quality. . In addition, since the operating principle of the piezoelectric speaker uses the above-mentioned stretching vibration of the piezoelectric element 1, the Q value (sharpness) of the vibration of the piezoelectric element 1 itself directly affects the acoustic characteristics, and the sound pressure-frequency characteristics are sharp. This resulted in peaks and valleys, and it was not always possible to obtain good acoustic characteristics.
本発明は上記問題点に鑑み、異常音を生ぜず、また音圧
−周波数特性が平坦な圧電スピーカを捉方は、金属薄膜
と１，２ポリブタジエンを含浸したシート状基板を積層
して圧縮成形によって貼り合わせ、さらに金属薄膜に圧
電素子を接着した３層構造を有する構成となっている。In view of the above-mentioned problems, the present invention proposes a piezoelectric speaker that does not produce abnormal noise and has a flat sound pressure-frequency characteristic.It is possible to create a piezoelectric speaker that does not produce abnormal noise and has a flat sound pressure-frequency characteristic. It has a three-layer structure in which the piezoelectric element is bonded to the metal thin film.
作 用
この構成によれば、圧電素子エレメントの振動は１，２
ポリブタジエンに吸収されてフレームに伝わらず、異常
音が発生することはない。また、圧電素子エレメントの
片面が１，２ポリブタジエンでおおわれているため、圧
電素子のＱ値が大幅・に低下し、音圧−周波数特性の山
谷が緩和され平坦になり良好な音響特性を得ることがで
きる。Effect: According to this configuration, the vibration of the piezoelectric element is 1 or 2
It is absorbed by the polybutadiene and is not transmitted to the frame, so no abnormal noise is generated. In addition, because one side of the piezoelectric element is covered with 1,2 polybutadiene, the Q value of the piezoelectric element is significantly reduced, and the peaks and valleys of the sound pressure-frequency characteristics are alleviated and flattened, resulting in good acoustic characteristics. I can do it.
実施例
以下本発明の一実施例の圧電スピーカについて、図面を
参照しながら説明する。EXAMPLE Hereinafter, a piezoelectric speaker according to an example of the present invention will be described with reference to the drawings.
第１図および第２図は本発明の一実施例における圧電ス
ピーカの断面図及び上面図を示すものである。第１図に
おいて、７は圧電素子、８は金属薄膜、９は１，２ポリ
ブタジエンを含浸したシート状基材であり、これらはそ
れぞれ貼り合わせて圧電素子エレメント１０を構成して
いる。１１はフレーム、１２．１３は金糸線である。上
記構成において、以下さらに詳述する。FIGS. 1 and 2 show a cross-sectional view and a top view of a piezoelectric speaker according to an embodiment of the present invention. In FIG. 1, 7 is a piezoelectric element, 8 is a metal thin film, and 9 is a sheet-like base material impregnated with 1,2 polybutadiene, which are bonded together to form a piezoelectric element element 10. 11 is a frame, and 12 and 13 are gold thread wires. The above configuration will be described in further detail below.
シート状基材９は以下のように構成される。まず、１，
２ポリブタジエン（例えば、日本合成ゴム製、商品名Ｔ
ＳＲ−ＲＢａ１ｏ ）をトリクロロエチレ／に溶解し、
ラジカル重合剤としてジクミルパーオキサイドを１，２
ポリブタジ工ン１ＱＯ重量部に対し５重量部加えて２０
チ樹脂溶液フエスとした。このフェノ中に目付け２０ｇ
／ｌｎ”のポリエステル系不織布を浸漬し、収り出して
、１００℃恒温空気中で１０分間乾燥を行い、１，２ポ
リブタジェン−ポリエステル混成プリプレグを得る。The sheet-like base material 9 is configured as follows. First, 1,
2 polybutadiene (for example, manufactured by Japan Synthetic Rubber, trade name T
SR-RBa1o) was dissolved in trichloroethylene,
1 or 2 dicumyl peroxide as a radical polymerization agent
Add 5 parts by weight to 1QO weight part of polybutadiene and add 20
The resin solution was made into FES. Weight 20g in this pheno
/ln'' polyester nonwoven fabric is immersed, taken out, and dried for 10 minutes in air at a constant temperature of 100°C to obtain a 1,2 polybutadiene-polyester hybrid prepreg.
このプリプレグの樹脂含有率は約１２ｗｔ ％である。The resin content of this prepreg is about 12 wt%.
このシート状プリプレグを２枚金寓薄膜８（アルミニウ
ム箔２０μｍ）を重ね、２００℃１時間。Two sheets of this prepreg sheet were layered with Kingyu Thin Film 8 (aluminum foil 20 μm) and heated at 200°C for 1 hour.
圧力２０ Ｋ９ ／ にｉで圧縮成形を行ない、シート
状基材９を形成するとともに７−ト状基材９に金属薄膜
８を積層、接着する。その後、ゴム系の接着剤で金属薄
膜８と圧電素子アを貼りつけ圧電素子ニレメン）１０を
構成する。尚、シート状プリプレグを１枚を用いてもよ
い。Compression molding is carried out at a pressure of 20 K9/i to form a sheet-like base material 9, and at the same time, a metal thin film 8 is laminated and adhered to the 7-tape base material 9. Thereafter, the metal thin film 8 and the piezoelectric element 10 are attached using a rubber adhesive to form a piezoelectric element 10. Note that one sheet prepreg may be used.
以上のように構成された圧電スピーカについて、以下第
１図を用いてその動作を説明する。The operation of the piezoelectric speaker configured as described above will be explained below using FIG. 1.
圧電素子アと金属薄膜８および、１，２ポリブタジエン
を含浸したシート状基材９を貼り合わせて圧電素子エレ
メント１０を構成すると圧電素子７が接着されているた
め、全体としての圧電素子エレメント１ｏではたわみ振
動となる。When the piezoelectric element 10 is constructed by bonding the piezoelectric element A, the metal thin film 8, and the sheet-like base material 9 impregnated with 1,2 polybutadiene, the piezoelectric element 7 is bonded, so the piezoelectric element 1o as a whole is This results in deflection vibration.
圧電素子γ側をマイナスとした圧電素子エレメント１Ｑ
に正電圧が印加された場合には、圧電素子７が伸び、圧
電素子７側が凸状にそる。負電圧が印加された場合は圧
電素子エレメント１０は縮み、圧電素子７が凹状にそる
。Piezoelectric element 1Q with the piezoelectric element γ side negative
When a positive voltage is applied to the piezoelectric element 7, the piezoelectric element 7 expands, and the piezoelectric element 7 side warps in a convex shape. When a negative voltage is applied, the piezoelectric element 10 contracts, and the piezoelectric element 7 warps in a concave shape.
そして、金糸線１２．１３間に音声入力を加えることに
より、圧電素子エレメント１０は上述の動作原理により
振動し発音する。Then, by applying audio input between the gold thread wires 12 and 13, the piezoelectric element 10 vibrates and produces sound according to the above-described operating principle.
以上のように木実施例によれば、圧電素子７と金属薄膜
８および１，２ポリブタジエンを含浸したシート状基材
９を貼り合わせて圧電素子エレメント１０を構成するこ
とにより、１，２ポリブタジエンの振動吸収効果により
振動が吸収されてフレームに伝わらず、異常音が発生す
ることがなくなる。さらに、１，２ポリブタジエノによ
り圧電素子７のＱ値が大幅に低下し、約２０ ｄＢ共振
ピークが低下し、平坦性の良好な圧電スピーカを得るこ
とができる。As described above, according to the wood embodiment, the piezoelectric element 10 is constructed by bonding the piezoelectric element 7, the metal thin film 8, and the sheet-like base material 9 impregnated with 1,2 polybutadiene. The vibration absorption effect absorbs vibrations and prevents them from being transmitted to the frame, eliminating the occurrence of abnormal noise. Furthermore, the Q value of the piezoelectric element 7 is significantly lowered by 1,2 polybutadieno, and the resonance peak is lowered by about 20 dB, making it possible to obtain a piezoelectric speaker with good flatness.
発明の効果
以上のように本発明は１，２ポリブタジエンを含浸させ
たシート状プリプレグと金属薄膜を圧縮成形を行ない一
体化したものに圧電素子を貼り合わせた圧電素子エレメ
ントにより、異常音の吸収および音圧−周波数特性上の
山谷を平坦化することができ、良好な音響特性を有する
優れた圧電スピーカを実現できるものである。Effects of the Invention As described above, the present invention has a piezoelectric element in which a piezoelectric element is bonded to a sheet-like prepreg impregnated with 1,2 polybutadiene and a thin metal film that are compression-molded and bonded together to absorb abnormal sound and The peaks and valleys in the sound pressure-frequency characteristics can be flattened, and an excellent piezoelectric speaker with good acoustic characteristics can be realized.
第１図は本発明の一実施例における圧電スピーカの断面
図、第２図は第１図の上面図、第３図は従来の圧電スピ
ーカの断面図である。
７・・・・・・圧電素子、８・・・・・・金属薄膜、９
・・・・・・シート状基材、１Ｑ・・・・・・圧電素子
エレメント、１１・・・・・・フレーム、１２．１３・
・・・・・金糸線。FIG. 1 is a sectional view of a piezoelectric speaker according to an embodiment of the present invention, FIG. 2 is a top view of FIG. 1, and FIG. 3 is a sectional view of a conventional piezoelectric speaker. 7...Piezoelectric element, 8...Metal thin film, 9
... Sheet-like base material, 1Q ... Piezoelectric element, 11 ... Frame, 12.13.
...Gold wire.
Claims (1)
と金属薄膜を積層して圧縮成形し、金属薄膜に圧電素子
を接着した３層構造を有する圧電素子エレメントを用い
たことを特徴とする圧電スピーカ。A piezoelectric speaker characterized by using a piezoelectric element having a three-layer structure in which a sheet prepreg impregnated with 1,2 polybutadiene and a metal thin film are laminated and compression molded, and a piezoelectric element is bonded to the metal thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378084A JPS61121699A (en) | 1984-11-19 | 1984-11-19 | Piezo-electric speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378084A JPS61121699A (en) | 1984-11-19 | 1984-11-19 | Piezo-electric speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61121699A true JPS61121699A (en) | 1986-06-09 |
| JPH0556080B2 JPH0556080B2 (en) | 1993-08-18 |
Family
ID=17108859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24378084A Granted JPS61121699A (en) | 1984-11-19 | 1984-11-19 | Piezo-electric speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61121699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021106931A1 (en) * | 2019-11-29 | 2021-06-03 | 日本曹達株式会社 | Terminally modified polybutadiene, resin composition for metal-clad laminates, prepreg, and metal-clad laminate |
-
1984
- 1984-11-19 JP JP24378084A patent/JPS61121699A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021106931A1 (en) * | 2019-11-29 | 2021-06-03 | 日本曹達株式会社 | Terminally modified polybutadiene, resin composition for metal-clad laminates, prepreg, and metal-clad laminate |
| JPWO2021106931A1 (en) * | 2019-11-29 | 2021-06-03 | ||
| CN114729064A (en) * | 2019-11-29 | 2022-07-08 | 日本曹达株式会社 | Terminal-modified polybutadiene, resin composition for metal-clad laminate, prepreg, and metal-clad laminate |
| CN114729064B (en) * | 2019-11-29 | 2023-09-29 | 日本曹达株式会社 | Terminal-modified polybutadiene, resin composition for metal-clad laminate, prepreg, and metal-clad laminate |
| EP4067077A4 (en) * | 2019-11-29 | 2024-01-03 | Nippon Soda Co., Ltd. | Terminally modified polybutadiene, resin composition for metal-clad laminates, prepreg, and metal-clad laminate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0556080B2 (en) | 1993-08-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |