JPS63256098A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPS63256098A JPS63256098A JP9020687A JP9020687A JPS63256098A JP S63256098 A JPS63256098 A JP S63256098A JP 9020687 A JP9020687 A JP 9020687A JP 9020687 A JP9020687 A JP 9020687A JP S63256098 A JPS63256098 A JP S63256098A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- epoxy resin
- speaker
- lacquer
- prepreg sheet
- 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
- 239000003822 epoxy resin Substances 0.000 claims abstract description 15
- 239000010445 mica Substances 0.000 claims abstract description 15
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 15
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 15
- 239000004922 lacquer Substances 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 8
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000004299 exfoliation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 229920006334 epoxy coating Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
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として用いられるスピーカ用振動
板に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a diaphragm for a speaker used as an audio output device.
従来の技術
近年、カセットテープレコーダ、マイク賞カセットテー
プレコーダ、ハイファイステレオ業界においては音響特
性においても、従来よシもさらに出力音圧、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。Conventional technology In recent years, in the cassette tape recorder, microphone award cassette tape recorder, and high-fidelity stereo industries, there has been a demand for speakers with better output sound pressure, distortion rate, and flatness than ever before in terms of acoustic characteristics. Speaker diaphragms, which influence the characteristics, are becoming increasingly important.
以下、上述の従来のスピーカについて説明する。The conventional speaker mentioned above will be explained below.
従来のスピーカは、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、ボール、プレート
、ヨークよシなる磁気回路系（図示せず）よシなる。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
じて振動すム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）。A conventional speaker consists of a vibration system such as a diaphragm, a voice coil bobbin, and a voice coil, and a magnetic circuit system (not shown) such as a magnet, ball, plate, and yoke. When an audio current flows through a voice coil in a uniform magnetic field, a vertical electromagnetic force is generated in the voice coil, which vibrates in response to the current.This vibration is correctly transmitted to the vibration of the diaphragm and radiated as a sound wave. (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、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。Problems to be Solved by the Invention However, it is ideal for the diaphragm of a speaker to move as a piston over the frequency band in use, and if the diaphragm deforms during vibration or split vibration occurs, the sound pressure-frequency characteristics and distortion will change. The ratio, phase characteristics, etc. deteriorate, which impedes high-fidelity reproduction. In addition, conventional paper cone diaphragms and plastic diaphragms have E/ρ (E: elastic modulus,
Since the ρ (density) is small, the high-frequency resonant frequency is low and the speaker cannot reproduce 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ｆ
ｃシ分割振動を生ぜず、高域共振周波が高いスピーカ用
振動板を提供するものである。In view of the above-mentioned problems, the present invention has been developed to prevent the diaphragm from deforming during vibration.
The object of the present invention is to provide a diaphragm for a speaker that does not produce c-split vibration and has a high high-frequency resonance frequency.
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
リン片状マイカとエポキシ樹脂よシなるプリプレグシー
トが加熱圧縮成形された成形物の少なくとも片面に漆が
コーティングされた成形物を振動板として用いたもので
ある。Means for Solving the Problems In order to achieve this object, the speaker diaphragm of the present invention is made by heat compression molding a prepreg sheet made of scale-like mica and epoxy resin, and coating at least one side of the molded product with lacquer. The molded product was used as a diaphragm.
作 用
このスピーカ用振動板は、非常に弾性率が大きいリン片
状マイカとエポキシ樹脂の複合体で構成されているため
、曲げ剛性が非常に大きく、振動中に振動板が変形した
多分割共振が生ぜず、優れた音圧−周波数特性、歪み率
、位相特性を持ち、さらにリン片状マイカとエポキシ樹
脂の複合体の表面に漆をコーティングすることによシ、
複合体の剥がれを防止でき、信頼性が向上し、内部損失
も大きくなる。また、プリプレグシートに圧縮成形が行
なわれ、漆がコーティングされて形成されるため、任意
の振動板形状に加工できる。この九め、平板状の振動板
だけでなく、ドーム状の振動板など形状によらず自由に
加工でき、任意の音響特性を得ることができる。Function: This speaker diaphragm is composed of a composite of scale-like mica and epoxy resin, which has a very high elastic modulus, so it has very high bending rigidity, and the diaphragm is deformed during vibration. It has excellent sound pressure-frequency characteristics, distortion rate, and phase characteristics, and by coating the surface of the scale-like mica and epoxy resin composite with lacquer,
Peeling of the composite can be prevented, reliability is improved, and internal loss is also increased. Furthermore, since the prepreg sheet is compression molded and coated with lacquer, it can be processed into any desired diaphragm shape. In addition to flat diaphragms, diaphragms can also be formed into dome-shaped diaphragms, regardless of their shape, and any desired acoustic characteristics can be obtained.
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。EXAMPLE A speaker diaphragm according to an example of the present invention will be described below.
本発明の一実施例におけるスピーカ用振動板は、リン片
状マイカとエポキシ樹脂よシなるプリプレグシートを加
熱圧縮成形した成形物の少なくとも片面に漆をコーティ
ングした振動板で、この振動板に先端を固着させたボイ
スコイルボビンの末端のボイスコイルを磁気回路の磁気
ギャップ（図示せず）に挿入して振動させるようにして
スピーカを形成する。The speaker diaphragm in one embodiment of the present invention is a diaphragm in which at least one side of the diaphragm is coated with lacquer, which is formed by heating and compression molding a prepreg sheet made of flaky mica and epoxy resin. A speaker is formed by inserting the voice coil at the end of the fixed voice coil bobbin into a magnetic gap (not shown) of a magnetic circuit and causing it to vibrate.
以上のように構成されたスピーカ用振動板について、以
下その製造方法について説明する。A method for manufacturing the speaker diaphragm constructed as described above will be described below.
まず、振動板素材として、リン片状マイカとエポキシ樹
脂よシなるプリプレグシートを用いる。First, a prepreg sheet made of flaky mica and epoxy resin is used as the diaphragm material.
このプリプレグシートは抄紙法によｌン片状マイカをシ
ート状に抄造・乾燥後エポキシ樹脂とトルエンの混合溶
液に含浸して形成される。配合割合はリン片状マイカ７
０ Ｗ 十％ 、エポキシ樹脂ａ ｏ Ｗ 十％で成形
後、膜厚が２０μｍになるように調整したものである。This prepreg sheet is formed by forming flaky mica into a sheet by a papermaking method, drying it, and then impregnating it in a mixed solution of epoxy resin and toluene. The blending ratio is 7 pieces of flaky mica.
After molding with 0 W 10% and epoxy resin aoW 10%, the film thickness was adjusted to 20 μm.
このようにして得られたプリプレグシート、圧縮成形に
よシ温度１６０°Ｃ１圧力２０１ｇ／ｃｒｌ 、時間２
０分の条件でドーム状（ドーム径φ３０ ｆｉｌｍ ）
に成形した成形物に、膜厚１６０μｍの漆を刷毛塗シに
よシコーティングさせた成形物を振動板として用いたも
のである。The prepreg sheet thus obtained was compression molded at a temperature of 160°C, a pressure of 201 g/crl, and a time of 2.
Dome shape under 0 minute condition (dome diameter φ30 film)
The diaphragm was made by coating a molded product with 160 μm thick lacquer using a brush.
以上のように本実施例によれば、リン片状マイカとエポ
キシ樹脂よシなるプリプレグシートが加熱圧縮成形され
た成形物の少なくとも片面に漆がコーティングされた振
動板を用いたスピーカは、非常に弾性率の大きいリン片
状マイカとエポキシ樹脂との複合物によシ振動板の変形
、分割共振が生ぜず良好な音響特性が得られ、歪率が低
下するものである。また、高域共振周波数も上昇し、出
力音圧は振動板が軽量になったため上昇する。また漆コ
ーティングによシ、前述の特性を損なわず信頼性が向上
し、また内部損失も大きくなるものである。As described above, according to this embodiment, a speaker using a diaphragm coated with lacquer on at least one side of a molded product made of a prepreg sheet made of flaky mica and an epoxy resin is extremely effective. The composite material of scale-like mica having a high elastic modulus and epoxy resin prevents deformation of the diaphragm and split resonance, provides good acoustic characteristics, and lowers the distortion rate. In addition, the high-frequency resonance frequency also increases, and the output sound pressure increases because the diaphragm becomes lighter. Moreover, lacquer coating improves reliability without impairing the above-mentioned characteristics, and also increases internal loss.
発明の効果
以上のように本発明はリン片状マイカとエポキシ樹脂よ
シなるプリプレグ７−トが加熱圧縮成形された成形物の
少なくとも片面に漆がコーティングされた成形物を振動
板として用いたもので、リン片状マイカとエポキシ樹脂
の複合体によシ歪率が小さく、高域共振周波数が高くな
シ漆をコーティングすることで複合体の剥離防止ができ
、信頼性も向上する。さらに内部損失も大きいため、不
要な共振が抑えられ周波数特性が平坦で良好な音響特性
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 heating and compression molding a prepreg made of scale-like mica and an epoxy resin and coating at least one side with lacquer as a diaphragm. By coating a composite of flaky mica and epoxy resin with lacquer, which has a low strain rate and a high high resonance frequency, it is possible to prevent the composite from peeling off and improve reliability. Furthermore, since the internal loss is large, unnecessary resonance can be suppressed, and an excellent speaker with flat frequency characteristics and good acoustic characteristics can be realized.
Claims (1)
トが加熱圧縮成形された成形物の少なくとも片面に漆が
コーティングされたことを特徴とするスピーカ用振動板
。A diaphragm for a speaker, characterized in that a prepreg sheet made of flaky mica and an epoxy resin is heated and compression molded, and at least one side of the molded product is coated with lacquer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9020687A JPH0793757B2 (en) | 1987-04-13 | 1987-04-13 | Vibration plate for speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9020687A JPH0793757B2 (en) | 1987-04-13 | 1987-04-13 | Vibration plate for speakers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63256098A true JPS63256098A (en) | 1988-10-24 |
| JPH0793757B2 JPH0793757B2 (en) | 1995-10-09 |
Family
ID=13992013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9020687A Expired - Lifetime JPH0793757B2 (en) | 1987-04-13 | 1987-04-13 | Vibration plate for speakers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793757B2 (en) |
-
1987
- 1987-04-13 JP JP9020687A patent/JPH0793757B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0793757B2 (en) | 1995-10-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071009 Year of fee payment: 12 |