JPH0667029B2 - Vibration plate for speakers - Google Patents
Vibration plate for speakersInfo
- Publication number
- JPH0667029B2 JPH0667029B2 JP7774887A JP7774887A JPH0667029B2 JP H0667029 B2 JPH0667029 B2 JP H0667029B2 JP 7774887 A JP7774887 A JP 7774887A JP 7774887 A JP7774887 A JP 7774887A JP H0667029 B2 JPH0667029 B2 JP H0667029B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- speaker
- speakers
- urushiol
- pulp
- 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 - Fee Related
Links
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は音響出力機器等に用いられるスピーカ用振動板
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm for a speaker used in an acoustic output device or the like.
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、ハイファイステレオ業界においては音響出
力機器としてのスピーカの音響特性においても、従来よ
りもさらに出力音圧、歪み率、平坦性に優れたスピーカ
が望まれており、音響特性を左右するスピーカ用振動板
はますます重要視されている。2. Description of the Related Art In recent years, cassette tape recorders, microcassette tape recorders, and in the hi-fi stereo industry, speakers with excellent output sound pressure, distortion rate, and flatness have been desired even in the acoustic characteristics of speakers as acoustic output devices. The diaphragm for speakers, which influences the acoustic characteristics, is becoming more and more important.
従来より、一般にスピーカは振動板，ボイスコイルボビ
ン、ボイスコイルなどの振動系と、マグネット，ポー
ル，プレート，ヨークよりなる磁気回路系（図示せず）
よりなり、一様な磁場中の中にあるボイスコイルに音声
電流が流れると、ボイスコイルに上下方向の電磁力が発
生し、電流に応じて振動するが、この振動を正しく振動
板の振動に伝え音波として放射される（例えば、早坂寿
雄：音響工学入門、日刊工業新聞社）。Conventionally, a speaker is generally a vibration circuit, a vibration system such as a voice coil bobbin, a voice coil, and a magnetic circuit system (not shown) including a magnet, a pole, a plate, and a yoke.
When a voice current flows through a voice coil in a uniform magnetic field, a vertical electromagnetic force is generated in the voice coil and it vibrates according to the current. Emitted as transmitted sound waves (for example, Hisao Hayasaka: Introduction to Acoustic Engineering, Nikkan Kogyo Shimbun).
発明が解決しようとする問題点 しかしながら、スピーカの振動板は使用する周波数帯域
にわたってピストン運動することが理想とされるが、振
動中に振動板が変形したり分割振動が生ずると音圧−周
波数特性、歪み率、位相特性等が劣化し、高忠実再生の
妨げとなる。また、従来の紙コーン振動板やプラスチッ
ク振動板は振動板材料のもつＥ／ρ（ただし、Ｅ：弾性
率、ρ：密度）が小さいため、高域共振周波数が低く、
スピーカが高域まで再生できないという欠点があった。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, it is ideal that the diaphragm of the speaker makes a piston motion over the frequency band used, but if the diaphragm is deformed or divided vibration occurs during vibration, the sound pressure-frequency characteristic is generated. , The distortion rate, the phase characteristics, etc. are deteriorated, which hinders high fidelity reproduction. Moreover, since the conventional paper cone diaphragm and the plastic diaphragm have a small E / ρ (E: elastic modulus, ρ: density) of the diaphragm material, the high resonance frequency is low,
There was a drawback that the speaker could not reproduce up to high frequencies.
本発明は上記問題点に鑑み、振動中に振動板が変形した
り分割振動を生ぜず、高域共振周波数が高いスピーカ用
振動板を提供するものである。In view of the above problems, the present invention provides a speaker diaphragm having a high high resonance frequency, which does not cause the diaphragm to deform or generate divided vibration during vibration.
問題点を解決するための手段 この目的を達成するために本発明のスピーカ用振動板
は、フェノール誘導体であるウルシオールをパルプに含
浸した成形物からなっている。Means for Solving the Problems In order to achieve this object, the speaker diaphragm of the present invention comprises a molded product obtained by impregnating pulp with urushiol, which is a phenol derivative.
作用 本発明のスピーカ用振動板は、フェノール誘導体である
ウルシオールをパルプに含浸しているため、非常に弾性
率が大きく、振動板の曲げ剛性が非常に大きくなり、振
動中に振動板が変形したり分割共振が生じない。また、
基材として例えばクラフトパルプを用い、これに上述の
含浸剤を含浸させることにより、比弾性率Ｅ／ρ（但
し、Ｅ：弾性率、ρ：密度）が大きく、スピーカの再生
帯域がのび、優れた音圧−周波数特性、歪み率、位相特
性を持つスピーカを得ることができる。Effect The speaker diaphragm of the present invention has a very high elastic modulus because the pulp is impregnated with urushiol, which is a phenol derivative, and the flexural rigidity of the diaphragm is very high, which causes the diaphragm to deform during vibration. Or split resonance does not occur. Also,
By using, for example, kraft pulp as a base material and impregnating it with the above-mentioned impregnating agent, the specific elastic modulus E / ρ (however, E: elastic modulus, ρ: density) is large, the reproduction band of the speaker is extended, and it is excellent. A speaker having sound pressure-frequency characteristics, distortion rate, and phase characteristics can be obtained.
さらに、この振動板はフェノール誘導体であるウルシオ
ールを含浸剤として用いているため、耐溶剤性、耐水
性、耐熱性に優れているため、非常に過酷な条件でのス
ピーカの使用に耐えるものである。Furthermore, since this diaphragm uses urushiol, which is a phenol derivative, as an impregnating agent, it has excellent solvent resistance, water resistance, and heat resistance, so it can withstand use of the speaker under extremely severe conditions. is there.
実施例 以下、本発明の一実施例のスピーカ用振動板について説
明する。本発明の一実施例におけるスピーカ用振動板
は、フェノール誘導体であるウルシオールをパルプに含
浸した後、加熱した成形物からなっている。Example Hereinafter, a speaker diaphragm according to an example of the present invention will be described. The loudspeaker diaphragm in one embodiment of the present invention is made of a molded product obtained by impregnating pulp with urushiol, which is a phenol derivative, and then heating the pulp.
この振動板の製造方法について述べると、まず、フェノ
ール誘導体であるウルシオールを目付け２５g/m2、口径
２８mmのクラフトパルプを含浸した後、加熱、硬化し
て、例えば目付け３０g/m2のドーム状振動板を形成す
る。The method of manufacturing this diaphragm is as follows: First, urushiol, which is a phenol derivative, is impregnated with kraft pulp having a basis weight of 25 g / m 2 and a diameter of 28 mm, and then heated and cured to form a dome shape with a basis weight of 30 g / m 2 . Form a diaphragm.
以上のように形成された振動板は、フェノール誘導体で
あるウルシオールをパルプに含浸しているため、非常に
弾性率が大きく、振動板の曲げ剛性が非常に大きくな
り、振動中に振動板が変形したり分割共振が生ぜず良好
な音響特性が得られ、同じ形状のアルミニウム製ドーム
型振動板と比較して歪み率を２３dB低下させることがで
きる。また、高域共振周波数は２１KHzより３０KHzに上
昇させることができるとともに、出力音圧のピークディ
ップも±３dBとアルミニウムの振動板と比較して、約±
３dB低下させることができ、優れた音圧−周波数特性、
歪み率、位相特性を持つスピーカを実現できる。さら
に、ウルシオールを含浸剤として用いているため、耐溶
剤性、耐水性に優れ、過酷な条件下でのスピーカの使用
に耐えることもできる。The diaphragm formed as described above has a very high elastic modulus because the pulp is impregnated with urushiol, which is a phenol derivative, and the flexural rigidity of the diaphragm is also extremely high. Good acoustic characteristics can be obtained without deformation or split resonance, and the distortion rate can be reduced by 23 dB as compared with the aluminum dome type diaphragm having the same shape. In addition, the high frequency resonance frequency can be raised from 21KHz to 30KHz, and the peak dip of the output sound pressure is ± 3dB, which is about ± compared to the aluminum diaphragm.
3dB reduction, excellent sound pressure-frequency characteristics,
A speaker having a distortion rate and phase characteristics can be realized. Furthermore, since urushiol is used as the impregnating agent, it has excellent solvent resistance and water resistance, and can withstand use of the speaker under severe conditions.
尚、本実施例において、振動板の形状はドーム状のみな
らず、コーン形でも同様の効果が得られるものであり、
さらに、サンドイッチ構造の平板振動板の表面材として
用いてもいいものである。In the present embodiment, the diaphragm is not limited to the dome shape, but the same effect can be obtained with the cone shape.
Further, it may be used as a surface material of a flat plate diaphragm having a sandwich structure.
発明の効果 以上のように本発明は、フェノール誘導体であるウルシ
オールをパルプに含浸した成形物を振動板として用いる
ことにより、歪み率が小さく、高域共振周波数が高く、
また音響出力の大きなスピーカを得ることができ、良好
な音響特性を有する優れた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 uses a molded product obtained by impregnating urushiol, which is a phenol derivative, in pulp as a vibration plate, so that the strain rate is small and the high resonance frequency is high.
Further, a speaker having a large acoustic output can be obtained, and an excellent speaker having good acoustic characteristics can be realized.
Claims (1)
ールをパルプに含浸した成形物からなるスピーカ用振動
板。1. A speaker diaphragm comprising a molded product obtained by impregnating urushiol, which is one of the phenol derivatives, into pulp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7774887A JPH0667029B2 (en) | 1987-03-31 | 1987-03-31 | Vibration plate for speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7774887A JPH0667029B2 (en) | 1987-03-31 | 1987-03-31 | Vibration plate for speakers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63245098A JPS63245098A (en) | 1988-10-12 |
| JPH0667029B2 true JPH0667029B2 (en) | 1994-08-24 |
Family
ID=13642536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7774887A Expired - Fee Related JPH0667029B2 (en) | 1987-03-31 | 1987-03-31 | Vibration plate for speakers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0667029B2 (en) |
-
1987
- 1987-03-31 JP JP7774887A patent/JPH0667029B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63245098A (en) | 1988-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |