JPH01290400A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPH01290400A JPH01290400A JP12019588A JP12019588A JPH01290400A JP H01290400 A JPH01290400 A JP H01290400A JP 12019588 A JP12019588 A JP 12019588A JP 12019588 A JP12019588 A JP 12019588A JP H01290400 A JPH01290400 A JP H01290400A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- diaphragm
- whisker
- sheet layer
- carbon fiber
- 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
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 25
- 239000004917 carbon fiber Substances 0.000 claims abstract description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 20
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000003365 glass fiber Substances 0.000 claims abstract description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 6
- 239000004760 aramid Substances 0.000 claims 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 4
- 229910052581 Si3N4 Inorganic materials 0.000 abstract description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 238000013016 damping Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229920003368 Kevlar® 29 Polymers 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、軽量で音速ならびに内部損失が太きいスピー
カ用振動板に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker diaphragm that is lightweight and has high sound velocity and internal loss.
（従来の技術］
スピーカ用振動板として要求される特性は、軽量である
こと、弾性率が大きく従って、振動の伝播速度（音速）
が大きいこと、内部損失すなわち振動の内部減衰が適度
に大きいこと等が挙げられ、これらの特性を満たす素材
として、以前から祇、樹脂、金属等が知られている。(Prior art) The characteristics required for a speaker diaphragm are that it is lightweight, has a high elastic modulus, and has a high vibration propagation velocity (sound velocity).
These characteristics include a large internal loss, that is, a moderately large internal damping of vibrations, and materials that meet these characteristics include metal, resin, and metal.
また最近では、カーボン繊維クロスに樹脂を含浸した振
動板（実開昭６２−１９８９８）やセラミンク系材質か
らなる振動板（特開昭６２−１４４４９７）も使用され
ている。さらに前記カーボン繊維クロスに樹脂を含浸し
た振動板の弾性率を改良するものとして、樹脂に炭化ケ
イ素ウィスカーまたは窒化ケイ素ウィスカーを混練し、
これをカーボン繊維クロスに含浸させた振動板も開発さ
れている（特開昭６２−１４１８９１）。Recently, diaphragms made of carbon fiber cloth impregnated with resin (Japanese Patent Laid-Open No. 62-19898) and diaphragms made of ceramic material (Japanese Patent Laid-open No. 62-144497) have also been used. Furthermore, in order to improve the elastic modulus of the diaphragm in which the carbon fiber cloth is impregnated with resin, silicon carbide whiskers or silicon nitride whiskers are kneaded with the resin,
A diaphragm in which carbon fiber cloth is impregnated with this material has also been developed (Japanese Patent Laid-Open No. 141891/1989).
しかし従来の紙、樹脂、金属等を使用した振動板におい
ては、振動板に要求される前記特性のすベてを満足させ
ることができず、耐熱性や強度に欠ける等の欠点があっ
た。カーボン繊維クロスに樹脂を含浸した振動板、セラ
ミック系の振動板においても、音速と内部損失という相
反する特性をともに満足させることが難しく、音速（弾
性率）、内部損失のいずれもが大きい振動板は得られて
いない。However, conventional diaphragms made of paper, resin, metal, etc. cannot satisfy all of the characteristics required of diaphragms, and have drawbacks such as a lack of heat resistance and strength. Even with diaphragms made of carbon fiber cloth impregnated with resin and ceramic diaphragms, it is difficult to satisfy the conflicting characteristics of sound velocity and internal loss, and the diaphragms have large sound velocity (modulus of elasticity) and internal loss. has not been obtained.
樹脂にウィスカーを混練し、これをカーボン繊維クロス
ムこ含浸させた振動板は、ウィスカーの添加により高強
度、高弾性率が得られ、振動の減衰特性も改善されるが
、全体としては長繊維であるカーボン繊維の特性がなお
支配的で内部損失がやや小さいという難点がある。A diaphragm made by kneading whiskers into resin and impregnating it with carbon fiber cloth has high strength and high modulus of elasticity by adding whiskers, and improves vibration damping characteristics, but as a whole, it is made of long fibers. The disadvantage is that certain carbon fiber properties are still dominant and the internal loss is rather small.
本発明の目的は前記従来の問題点を解消し、軽量で音速
（弾性率）、内部損失がともに大きいスピーカ用振動板
を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a speaker diaphragm that is lightweight and has a large sound velocity (elastic modulus) and internal loss.
本発明は前記目的を達成するためになされたもので、カ
ーボン繊維クロス層の間にウィスカーシート層を介挿一
体とになるスピーカ用振動板であ図は本発明に係るスピ
ーカ用振動板の構造例を示す断面図である。図において
、振動板ｌはカーボン繊維４からなるカーボン繊維クロ
ス層２の間にウィスカーシート層３を介挿し、これらを
一体として構成される。ウィスカーシート層３は、直径
０．１〜１０ ｕ ｍ、長さ２０〜１００μｍの炭化ケ
イ素、窒化ケイ素等のウィスカー５とシート層３の骨格
となる長さ０．５〜３胴程度のｆ機系のアラミド繊維、
無機系のガラス繊維、アルミナ繊維等の骨格繊維６から
なる。The present invention has been made to achieve the above object, and is a speaker diaphragm integrated with a whisker sheet layer interposed between carbon fiber cloth layers. The figure shows the structure of a speaker diaphragm according to the present invention. It is a sectional view showing an example. In the figure, the diaphragm 1 is constructed by interposing a whisker sheet layer 3 between carbon fiber cloth layers 2 made of carbon fibers 4, and integrating these layers. The whisker sheet layer 3 consists of whiskers 5 made of silicon carbide, silicon nitride, etc., with a diameter of 0.1 to 10 μm and a length of 20 to 100 μm, and a whisker with a length of about 0.5 to 3 mm, which serves as the skeleton of the sheet layer 3. type aramid fiber,
It consists of skeleton fibers 6 such as inorganic glass fibers and alumina fibers.
ウィスカーとしては炭化ケイ素ウィスカーが好ましい。As the whisker, silicon carbide whiskers are preferred.
骨格繊維としては振動減衰率の大きいアラミド繊維が最
も好ましく、アラミド繊維を骨格とすることによって内
部損失の大きい振動板が得られる。７はカーボン繊維ク
ロス層２とウィスカーシート［３を積層一体とするため
の熱硬化性樹脂である。As the skeleton fiber, aramid fiber with a high vibration damping rate is most preferable, and by using aramid fiber as the skeleton, a diaphragm with a high internal loss can be obtained. 7 is a thermosetting resin for integrally laminating the carbon fiber cloth layer 2 and the whisker sheet [3].
振動板として最適の特性を得るためには、カーボン繊維
クロス層２の厚さを１００〜２００μｍ、ウィスカーシ
ート層３の厚さを５０〜１００μｍにするのが望ましい
。In order to obtain optimal characteristics as a diaphragm, it is desirable that the thickness of the carbon fiber cloth layer 2 be 100 to 200 μm and the thickness of the whisker sheet layer 3 be 50 to 100 μm.
第１図においては、単層のカーボン繊維クロス層の間に
単層のウィスカーシート層を介挿させた構造の振動板を
示したが、各層は必要に応じて複数層積層されていても
よ（、図の構造の振動板が複数層積層されてもよい。Figure 1 shows a diaphragm with a structure in which a single whisker sheet layer is interposed between a single carbon fiber cloth layer, but each layer may be laminated in multiple layers as necessary. (The diaphragm having the structure shown in the figure may be laminated in multiple layers.
本発明の振動板を製造するには、予めウィスカーとウィ
スカーシート層の骨格となる骨格繊維を純水または有機
溶媒中に均一に分散し、濾過、乾燥してウィスカーシー
トを作製する。この場合、ウィスカーと骨格繊維の配合
比は体積比で９０＝１０〜６０：４０が望ましい。骨格
繊維の配合率が１０％より少ないとウィスカーシートの
強度が不足して取り扱い上支障が生じる。４０％をこえ
ると弾性率を向上させるというウィスカーの特性がそこ
なわれる。つぎに、作製されたウィスカーシートとべつ
に用意されたカーボン繊維クロスの一方または両方に熱
硬化性樹脂を含浸してプリプレグ化した後積層し、加圧
状態で加熱して熱硬化性樹脂を硬化させることにより、
一体の振動板とする。To manufacture the diaphragm of the present invention, whiskers and skeleton fibers forming the skeleton of the whisker sheet layer are uniformly dispersed in pure water or an organic solvent, filtered, and dried to prepare a whisker sheet. In this case, the blending ratio of whiskers and skeleton fibers is preferably 90=10 to 60:40 in volume ratio. If the blending ratio of the skeletal fibers is less than 10%, the strength of the whisker sheet will be insufficient and handling problems will occur. If it exceeds 40%, the characteristic of the whisker to improve the elastic modulus is impaired. Next, one or both of the produced whisker sheet and the separately prepared carbon fiber cloth are impregnated with a thermosetting resin to form a prepreg, and then laminated and heated under pressure to harden the thermosetting resin. By this,
It is an integrated diaphragm.
〔作用］
本発明によれば、カーボン繊維とウィスカーとのハイブ
リッド構造となり、従来の樹脂にウィスカーを混練しカ
ーボン繊維クロスに含浸させたものと比ベライス力−の
特性が支配的となって音速内部損失ともに大きくするこ
とができる。[Function] According to the present invention, a hybrid structure of carbon fibers and whiskers is obtained, and the characteristics of the relative force of the conventional resin kneaded with whiskers and impregnated into carbon fiber cloth are dominant, and the internal velocity of sound is Both losses can be increased.
〔実施例］
カーホン繊維クロスとして東邦レーヨン■製ベスファイ
トＷ３１０］（ｆｆさ２５０μｍ）、ウィスカーとして
炭化ケイ素ウィスカー（直径０．５μｍ、長さ４０μｍ
）、骨格繊維として東し・デュポン社製アラミド繊維ケ
ブラー２９（直径１２μｍ、長さ５００μｍ）を用意し
た。[Example] As a carphone fiber cloth, Besphite W310 manufactured by Toho Rayon ■ (ff: 250 μm) was used, and as a whisker, silicon carbide whiskers (0.5 μm in diameter, 40 μm in length) were used.
), and aramid fiber Kevlar 29 (diameter 12 μm, length 500 μm) manufactured by DuPont Toshi was prepared as a skeleton fiber.
まず炭化ケイ素ウィスカー１０ｇｒ、アラミド繊維４ｇ
ｒを純水１リンドル中に均一に分散させ、この分散液を
ｌＯＯメツシュのブロンズ類の網により濾過し、乾燥さ
せて炭化ケイ素のウィスカーシート（直径３３０薗、厚
さ０．１ｍ＋ｎ）を作製した。First, silicon carbide whisker 10g, aramid fiber 4g
r was uniformly dispersed in 1 lindre of pure water, and this dispersion was filtered through a bronze net of lOO mesh and dried to produce a silicon carbide whisker sheet (diameter 330mm, thickness 0.1m+n). .
つぎに、このウィスカーシートとカーボン繊維クロス２
枚に熱硬化性エポキシ樹脂を含浸し、カーボン繊維クロ
スの間にウィスカーシートを介挿して加圧状態で加熱し
エポキシ樹脂を硬化させた。Next, this whisker sheet and carbon fiber cloth 2
The sheet was impregnated with thermosetting epoxy resin, a whisker sheet was inserted between the carbon fiber cloths, and heated under pressure to harden the epoxy resin.
得られた振動板の特性を第１表に示す。Table 1 shows the characteristics of the obtained diaphragm.
比較例１はカーボン繊維クロスのみからなる振動板、比
較例２はカーボン繊維クロスに炭化ケイ素ウィスカーを
体積比で０．５％混練したエポキシ樹脂を含浸させた振
動板である。Comparative Example 1 is a diaphragm made of only carbon fiber cloth, and Comparative Example 2 is a diaphragm made of carbon fiber cloth impregnated with epoxy resin in which silicon carbide whiskers are kneaded in an amount of 0.5% by volume.
第１表
第１表に示すように、本発明の振動板は軽量でかつ音速
、内部損失ともに大であり、スピーカ用振動板としてす
ぐれた特性を示している。As shown in Table 1, the diaphragm of the present invention is lightweight, has high sound velocity and high internal loss, and exhibits excellent characteristics as a diaphragm for speakers.
［発明の効果］
以上述べたように、本発明によれば軽量でかつウィスカ
ーの特性が有効に生かされ、音速（弾性率）および内部
損失がともに高い高性能のスピーカ用振動板が提供され
る。[Effects of the Invention] As described above, the present invention provides a high-performance speaker diaphragm that is lightweight, makes effective use of whisker characteristics, and has high sound velocity (modulus of elasticity) and high internal loss. .
図は本発明に係るスピーカ用振動板の構造を示す断面図
である。
１・・・振動板
２・・・カーボン繊維クロス層
３・・・ウィスカーシート層
４・・・カーボン繊維
５・・・ウィスカー
６・・・骨格繊維
７・・・熱硬化性樹脂
特許出願人 東海カーボン株式会社
代理人 弁理士 高 畑 正 也The figure is a sectional view showing the structure of a speaker diaphragm according to the present invention. 1... Vibration plate 2... Carbon fiber cloth layer 3... Whisker sheet layer 4... Carbon fiber 5... Whisker 6... Skeleton fiber 7... Thermosetting resin patent applicant Tokai Carbon Co., Ltd. Representative Patent Attorney Masaya Takahata
Claims (1)
ト層を介挿一体としてなるスピーカ用振動板。 ２、短繊維ウィスカーシート層が体積比で９０〜６０の
ウィスカーと１０〜４０の骨格繊維からなる請求項１記
載のスピーカ用振動板。 ３、短繊維ウィスカーが炭化ケイ素ウィスカーであり、
骨格繊維がアラミド繊維、ガラス繊維もしくはアルミナ
繊維である範囲第１項または第２項記載のスピーカ用振
動板。[Scope of Claims] 1. A diaphragm for a speaker that is integrally formed with a short fiber whisker sheet layer interposed between carbon fiber cloth layers. 2. The speaker diaphragm according to claim 1, wherein the short fiber whisker sheet layer comprises a volume ratio of 90 to 60 whiskers and 10 to 40 skeleton fibers. 3. The short fiber whiskers are silicon carbide whiskers,
The speaker diaphragm according to item 1 or 2, wherein the skeleton fibers are aramid fibers, glass fibers, or alumina fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12019588A JPH01290400A (en) | 1988-05-17 | 1988-05-17 | Diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12019588A JPH01290400A (en) | 1988-05-17 | 1988-05-17 | Diaphragm for speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01290400A true JPH01290400A (en) | 1989-11-22 |
Family
ID=14780264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12019588A Pending JPH01290400A (en) | 1988-05-17 | 1988-05-17 | Diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01290400A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5753713A (en) * | 1980-09-16 | 1982-03-30 | Takashi Mori | Connector of photoconductive cable |
| JPS604095B2 (en) * | 1980-09-24 | 1985-02-01 | 小森印刷機械株式会社 | Paper feeder drive device |
| JPS62141891A (en) * | 1985-12-16 | 1987-06-25 | Victor Co Of Japan Ltd | Speaker diaphragm |
-
1988
- 1988-05-17 JP JP12019588A patent/JPH01290400A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5753713A (en) * | 1980-09-16 | 1982-03-30 | Takashi Mori | Connector of photoconductive cable |
| JPS604095B2 (en) * | 1980-09-24 | 1985-02-01 | 小森印刷機械株式会社 | Paper feeder drive device |
| JPS62141891A (en) * | 1985-12-16 | 1987-06-25 | Victor Co Of Japan Ltd | Speaker diaphragm |
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