JPH0793757B2 - Vibration plate for speakers - Google Patents
Vibration plate for speakersInfo
- Publication number
- JPH0793757B2 JPH0793757B2 JP9020687A JP9020687A JPH0793757B2 JP H0793757 B2 JPH0793757 B2 JP H0793757B2 JP 9020687 A JP9020687 A JP 9020687A JP 9020687 A JP9020687 A JP 9020687A JP H0793757 B2 JPH0793757 B2 JP H0793757B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- speaker
- epoxy resin
- lacquer
- mica
- 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 - Lifetime
Links
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。TECHNICAL FIELD The present invention relates to a diaphragm for a speaker used as an acoustic output device.
従来の技術 近年、カセットテープレコーダ、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, icro cassette tape recorders, and hi-fi stereo industries have been demanding loudspeakers that have better output sound pressure, distortion rate, and flatness than the conventional sound characteristics. The diaphragm for a speaker that moves from side to side is becoming more and more important.
以下、上述の従来のスピーカについて説明する。Hereinafter, the above-mentioned conventional speaker will be described.
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、ヨークよりなる磁気回路系（図示せず）よりなる。
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
応じて振動する。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 includes a vibration system such as a diaphragm, a voice coil bobbin, and a voice coil, and a magnetic circuit system (not shown) including a magnet, a ball, 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 vibrates according to the current. This vibration is correctly transmitted to the vibration of the diaphragm and emitted as a sound wave (for example, Toshio 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。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, and if the diaphragm is deformed or divided vibration occurs during vibration, sound pressure-frequency characteristics and distortion are generated. The rate, phase characteristics, etc. are deteriorated, which hinders high fidelity reproduction. In addition, conventional paper cone diaphragms and plastic diaphragms have E / ρ (E: elastic modulus, ρ:
Since the density is small, the high-frequency resonance frequency is low, and there is a drawback that the speaker cannot reproduce up to the high frequency.
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
リン片状マイカとエポキシ樹脂より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 coated with lacquer on at least one surface of a molded product obtained by heat-compression molding a prepreg sheet composed of a flaky mica and an epoxy resin. The molded product is 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
たり分割共振が生ぜず、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
り、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。このため、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。Action This speaker diaphragm is made of a composite of scaly mica and epoxy resin, which has a very large elastic modulus, so the bending rigidity is very large, and the diaphragm may be deformed or split resonance during vibration. It has excellent sound pressure-frequency characteristics, distortion rate, and phase characteristics, and by coating the surface of the composite of scaly mica and epoxy resin with lacquer, peeling of the composite can be prevented and reliability is improved. Is improved and internal loss is increased. In addition, compression molding is performed on the prepreg sheet, and because it is formed by coating lacquer,
It can be processed into any diaphragm shape. Therefore, not only the flat plate-shaped diaphragm but also the dome-shaped diaphragm and the like can be processed freely and any acoustic characteristic 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 Hereinafter, a speaker diaphragm according to an example of the present invention will be described.
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り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。A speaker diaphragm according to an embodiment of the present invention is a diaphragm in which at least one surface of a molded product obtained by heat-compressing a prepreg sheet composed of a flake-like mica and an epoxy resin is coated with lacquer, and the tip is fixed to this diaphragm. A voice coil at the end of the voice coil bobbin thus formed is inserted into a magnetic gap (not shown) of a magnetic circuit and vibrated to form a speaker.
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。The manufacturing method of the speaker diaphragm configured 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
脂よりなるプリプレグシートを用いる。このプリプレグ
シートは抄紙法によりリ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70W＋％、エポ
キシ樹脂30W＋％で成形後、膜厚が20μｍになるように
調整したものである。このようにして得られたプリプレ
グシート、圧縮成形により温度150℃、圧力20kg/cm2、
時間20分の条件でドーム状（ドーム径φ30mm）に成形し
た成形物に、膜厚160μｍの漆を刷毛塗りによりコーテ
ィングさせた成形物を振動板として用いたものである。First, a prepreg sheet made of flake mica and epoxy resin is used as the diaphragm material. This prepreg sheet is formed by paper-making a sheet of scaly mica, drying it, and impregnating it with a mixed solution of an epoxy resin and toluene. The compounding ratio was 70 W +% of scaly mica and 30 W +% of epoxy resin, and was adjusted so that the film thickness would be 20 μm after molding. The prepreg sheet thus obtained, the temperature by compression molding 150 ℃, pressure 20kg / cm 2 ,
A dome-shaped (dome diameter φ30 mm) molded product under the condition of time of 20 minutes was coated with lacquer having a film thickness of 160 μm by brush coating and used as a diaphragm.
以上のように本実施例によれば、リン片状マイカとエポ
キシ樹脂より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り振動板の変
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、
出力音厚は振動板が計量になったため上昇する。また漆
コーティングにより、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 the present embodiment, the speaker using the diaphragm coated with lacquer on at least one surface of the molded product in which the prepreg sheet made of the flaky mica and the epoxy resin is compression-molded is very elastic. The composite of flake-like mica and epoxy resin, which have a high rate, does not cause deformation of the diaphragm or split resonance, and good acoustic characteristics are obtained, and the distortion rate is reduced. Also, the high frequency resonance frequency rises,
The output sound thickness rises because the diaphragm is weighed. In addition, the lacquer coating improves reliability without impairing the above-mentioned characteristics and 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
り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、リン片状マイカとエポキシ樹脂
の複合体により歪率が小さく、高域共振周波数が高くな
り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 is a prepreg sheet composed of a flake-like mica and an epoxy resin, which is used as a vibration plate using a molded product coated with lacquer on at least one surface of the molded product which is heat compression molded. The composite of flake mica and epoxy resin has a small distortion rate, the high resonance frequency becomes high, and the coating of lacquer prevents the composite from peeling and improves the reliability. Furthermore, since the internal loss is large,
It is possible to realize an excellent speaker that has unnecessary resonance and flat frequency characteristics and good acoustic characteristics.
Claims (1)
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ことを特徴とするスピ
ーカ用振動板。1. A diaphragm for a speaker, characterized in that at least one surface of a molded product obtained by heat-compressing and molding a prepreg sheet composed of flaky mica and epoxy resin 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 JPS63256098A (en) | 1988-10-24 |
| JPH0793757B2 true 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 |
|---|---|
| JPS63256098A (en) | 1988-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071009 Year of fee payment: 12 |