JPH0787634B2 - Speaker diaphragm - Google Patents
Speaker diaphragmInfo
- Publication number
- JPH0787634B2 JPH0787634B2 JP62301423A JP30142387A JPH0787634B2 JP H0787634 B2 JPH0787634 B2 JP H0787634B2 JP 62301423 A JP62301423 A JP 62301423A JP 30142387 A JP30142387 A JP 30142387A JP H0787634 B2 JPH0787634 B2 JP H0787634B2
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- Japan
- Prior art keywords
- strength
- modulus
- fiber
- diaphragm
- fibers
- Prior art date
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Description
【発明の詳細な説明】 「発明の目的」 （産業上の利用分野） 本発明はスピーカ用振動板に係り、特に高強度・高弾性
率ポリエチレン繊維と他の高強度・高弾性率繊維との交
織布で樹脂を強化した構造のスピーカ用振動板に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION "Object of the Invention" (Field of Industrial Application) The present invention relates to a speaker diaphragm, and particularly to a high-strength / high-modulus polyethylene fiber and another high-strength / high-modulus fiber. The present invention relates to a speaker diaphragm having a structure in which a resin is reinforced with a woven cloth.
（従来の技術と問題点） 従来の一般的なスピーカ振動板は紙パルプ材質によるも
のが多く使用されているが、この紙パルプ振動板は充分
な内部損失は有する反面、強度、弾性率及び剛性に欠け
る欠点がある。(Prior art and problems) Conventional general loudspeaker diaphragms are often made of a paper pulp material, but this paper pulp diaphragm has sufficient internal loss, but has strength, elastic modulus and rigidity. There is a defect that is lacking.
振動板の発生率、剛性を高めるために炭素繊維等の無機
繊維よりなる布帛で樹脂を強化した構造のスピーカ振動
板があるが、この種のスピーカ振動板は概して比重が重
く、軽量化できない、という欠点があり、また、弾性
率、剛性は増大するが、内部損失が少ないために高帯域
での材料鳴きが生じる欠点があった。There is a speaker diaphragm having a structure in which resin is reinforced with a cloth made of an inorganic fiber such as carbon fiber in order to increase the generation rate and rigidity of the diaphragm, but this kind of speaker diaphragm generally has a large specific gravity and cannot be made lighter. Although the elastic modulus and the rigidity are increased, there is a drawback that material squeal occurs in a high band because the internal loss is small.
音響振動板素材において、単一素材としては個々に優れ
た特性を備えたものであても、振動板として要求される
各特性の全てを理想的な形態で総合的に具備している単
一素材はないから、目的とする特性を得るために、いか
にしてこれらの素材を複合化するかは極めて重要である
と共に、また困難な問題でもある。In acoustic diaphragm material, even if each single material has excellent characteristics, it is a single material that comprehensively has all the characteristics required for the diaphragm in an ideal form. Therefore, how to combine these materials in order to obtain the desired properties is extremely important and is also a difficult problem.
近時、内部損失が大きくしかも過渡特性が良好であるこ
とから、ポリエチレン繊維が音響材料として注目され、
また、振動板を得る方法として縦波伝播速度4,000m/se
c.以上のポリエチレン繊維の短繊維を湿式抄紙する方法
が提案されている（例えば、特開昭58−182994号）。Recently, polyethylene fiber has attracted attention as an acoustic material because of its large internal loss and good transient characteristics.
Also, as a method to obtain a diaphragm, the longitudinal wave velocity is 4,000 m / se.
c. A method for wet papermaking of the above-mentioned short polyethylene fibers has been proposed (for example, JP-A-58-182994).
この方法は短繊維を用いて抄紙する形式であるから、例
えば、一方向を例にとると、引張弾性率が約３分の１程
度になるものであり、ポリエチレン繊維の利点が充分に
活かされていない。Since this method is a method of making paper using short fibers, for example, in one direction, the tensile elastic modulus is about 1/3, and the advantages of polyethylene fibers are fully utilized. Not not.
また、ポリエチレンをフィルムシート化してスキン層に
使用する例や織物にポリエチレンフィルムシートをラミ
ネートして複合化する例が提案されている（特開昭62−
157500号）。In addition, an example of using polyethylene as a film sheet for use in a skin layer and an example of laminating a polyethylene film sheet on a woven fabric to form a composite have been proposed (JP-A-62-62).
No. 157500).
しかし、自己融着力の弱いポリエチレンフィルムをラミ
ネートする方式の難点は、繊維のフィルム面の界面にお
いて接着力があまりなく、特にずれ方向に対して極度に
弱いことであり、例えば、耐入力が大きい場合や振幅疲
労で界面剥離をおこし、所期の物理的性能を劣化させ
る。However, the disadvantage of the method of laminating polyethylene film with weak self-bonding force is that there is not much adhesive force at the interface of the film surface of the fiber, and it is extremely weak especially in the deviation direction. And amplitude fatigue causes interfacial delamination, which deteriorates the desired physical performance.
しかして、これらの欠点を改善するにはプリプレグ方式
で織物に樹脂を含浸して得られた振動板の方が複合材と
して耐久力に優れることは容易に理解される。Therefore, in order to improve these drawbacks, it is easily understood that the diaphragm obtained by impregnating the woven fabric with the resin by the prepreg method is superior in durability as a composite material.
本発明の目的は、上記した従来の欠点を解消し、弾性率
及び剛性に富み、軽量化を図ることができると共に適度
な内部損失を有していて材料鳴きが生じることのないス
ピーカ用振動数を提供することにある。The object of the present invention is to eliminate the above-mentioned conventional drawbacks, have a high modulus of elasticity and rigidity, can achieve weight reduction, have an appropriate internal loss, and do not cause material squealing speaker frequency. To provide.
「発明の構成」 （問題点を解決するための手段） しかして、上記問題点を解決すべく、各種素材による音
響振動板としての物性を種々実験した結果、高強度・高
弾性率のポリエチレン繊維、なかでも弾性率が4500Kg/m
m2以上を有するものが音響材料的に優れていること、し
かもこのポリエチレン繊維と他の高強度・高弾性率繊維
とを交織して得た交織布と樹脂とで成形したスピーカ用
振動板は、高弾性率で剛性に富むこと、軽量であるこ
と、内部損失が大きく、鳴きが少ないこと等、特性的に
優れ、また、量産性及び経済性においても有利であるこ
とを見出し、本発明をするに至った。"Structure of the Invention" (Means for Solving Problems) However, in order to solve the above problems, various physical properties of various materials as an acoustic diaphragm were tested, and as a result, polyethylene fibers having high strength and high elastic modulus were obtained. , Above all, the elastic modulus is 4500 Kg / m
What has m 2 or more is excellent in acoustic material, and moreover, the speaker diaphragm formed by the resin and the woven cloth obtained by interwoven with this polyethylene fiber and other high-strength and high-modulus fiber is The present invention has been found to be excellent in characteristics such as high elasticity and high rigidity, light weight, large internal loss and low squeal, and also advantageous in mass productivity and economical efficiency. Came to do.
（作用） 振動板はその全体又は少なくとも表面層が、弾性率4500
Kg/mm2以上を有する高強度・高弾性率ポリエチレン繊維
と他の高強度・高弾性率繊維とを交織して得られた交織
布と樹脂とにより成形されているから、弾性率、剛性に
優れているのは勿論、比重が小さいために軽量化され、
また、従来の単一無機繊維強化プラスチックによる振動
板に比して内部損失が大きく、高域での材料鳴きが抑え
られる。(Function) The diaphragm has a modulus of elasticity of 4500 at least or at least in the surface layer.
Since it is made of a resin and a woven cloth obtained by weaving high-strength / high-modulus polyethylene fibers having a Kg / mm 2 or more and other high-strength / high-modulus fibers, it has excellent elasticity and rigidity. Not only is it excellent, but it is also lightened because of its low specific gravity,
Further, compared to the conventional diaphragm made of a single inorganic fiber reinforced plastic, the internal loss is large and the material squeal in the high range can be suppressed.
この場合、交織すべき他の高強度・高弾性率繊維を適宜
選択することにより音質に応じた交織が可能であり、目
的とする特性を備えた振動板を得ることができる。In this case, by appropriately selecting other high-strength and high-modulus fibers to be woven, it is possible to woven according to the sound quality, and it is possible to obtain a diaphragm having desired characteristics.
本発明に用いる高強度・高弾性率ポリエチレン繊維は、
少なくとも200Kg/mm2、好ましくは300Kg/mm2以上の引張
強度と少なくとも4500Kg/mm2、好ましくは10,000Kg/mm2
以上、更に好ましくは13,000Kg/mm2以上の引張弾性率を
有するものが推奨される。特に引張弾性率が4,500Kg/mm
2を下廻るものについては他の高強度・高弾性率繊維の
引張弾性率とのバランスがくずれて好ましくない。The high-strength, high-modulus polyethylene fiber used in the present invention is
At least 200 Kg / mm 2, preferably 300 Kg / mm 2 or more tensile strength of at least 4500 kg / mm 2, preferably 10,000 kg / mm 2
Above, more preferably, those having a tensile elastic modulus of 13,000 Kg / mm 2 or more are recommended. Especially the tensile modulus is 4,500 Kg / mm
If it is less than 2 , the balance with the tensile modulus of other high-strength and high-modulus fibers is lost, which is not preferable.
本発明に用いる高強度・高弾性率ポリエチレン繊維の単
繊維デニールについては特に限定されないが、好ましく
は0.2d〜20d、更に好ましくは0.5d〜10dとするのが良
い。また、高強度・高弾性率ポリエチレン繊維のトータ
ルデニールは特に限定はないが、他の高強度・高弾性率
繊維との糸太さのバランスからすると、300d〜1600dの
範囲が好ましい。The single fiber denier of the high-strength, high-modulus polyethylene fiber used in the present invention is not particularly limited, but is preferably 0.2d to 20d, more preferably 0.5d to 10d. The total denier of the high-strength / high-modulus polyethylene fiber is not particularly limited, but in view of the balance of the thread thickness with other high-strength / high-modulus fibers, the range of 300d to 1600d is preferable.
（実施例） 本発明に係るスピーカ用振動板の実施例を第１図及び第
２図に基づいて説明するが、第１図は一部を断面した斜
視図、第２図は他の構成例を示す一部を断面した斜視図
である。(Embodiment) An embodiment of a speaker diaphragm according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a partially sectional perspective view, and FIG. 2 is another configuration example. FIG. 3 is a perspective view in which a part of FIG.
第１図において、１はコーン型に成形された振動板全体
を指し、弾性率4500Kg/mm2以上を有する高強度・高弾性
率ポリエチレン繊維３と他の高強度・高弾性率繊維４と
で交織された交織布２と樹脂５により成形されている。
なお、図において、６はエッジを示している。In FIG. 1, reference numeral 1 designates the entire cone-shaped diaphragm, which comprises a high-strength / high-modulus polyethylene fiber 3 having a modulus of elasticity of 4500 kg / mm 2 or more and another high-strength / high modulus fiber 4. It is formed of the woven cloth 2 and the resin 5 which are woven.
In the figure, 6 indicates an edge.
上記した構成を具体例に従って説明すると、高強度・高
弾性率ポリエチレン繊維３は、引張弾性率10,000Kg/mm2
を有する1,600デニール/1,500フィラメントの高強度・
高弾性率ポリエチレン繊維（東洋紡績（株）商品名：ダ
イニーマSK−60）の原糸を用い、また、他の高強度・高
弾性率繊維４として、第１図の例では、3000フィラメン
トの弾性率24,00Kg/mm2の炭素繊維4aを使用した。そし
て交織布２としては、上記高強度・高弾性率ポリエチレ
ン繊維３と炭素繊維4aとを経緯共交互に1:1の割合で入
れた平織交織布（密度；径、緯13本／インチ）を使用し
た。Explaining the above-mentioned constitution according to a concrete example, the high-strength / high-modulus polyethylene fiber 3 has a tensile modulus of 10,000 Kg / mm 2
High strength of 1,600 denier / 1,500 filament with
A high-modulus polyethylene fiber (Toyobo Co., Ltd. trade name: Dyneema SK-60) is used as the original yarn, and as another high-strength / high-modulus fiber 4, in the example of FIG. 1, an elasticity of 3000 filaments is used. A carbon fiber 4a having a rate of 24,00 Kg / mm 2 was used. As the mixed woven cloth 2, a plain woven mixed woven cloth (density: diameter, 13 wefts / inch) in which the high-strength / high-modulus polyethylene fibers 3 and the carbon fibers 4a are alternately inserted in a ratio of 1: 1 along the warp and weft directions used.
上記交織布２にビニルエステル樹脂をプリプレグ加工し
たもの（以下「PEプリプレグ布」という）を成形型によ
って所定の条件（120℃、５分、面圧5Kg/cm2）で加熱加
圧成形することにより、８インチ用のコーン型振動板１
を得た。A prepreg-processed vinyl ester resin (hereinafter referred to as “PE prepreg cloth”) on the above-mentioned interwoven cloth 2 is heated and pressed under a predetermined condition (120 ° C., 5 minutes, surface pressure 5 Kg / cm 2 ) by a molding die. By 8 inch cone type diaphragm 1
Got
一般的に振動板に要求される各物性はバランスが良いこ
とが必要であるところ、例えば、従来の単一の炭素繊維
によるFRPで成形されたスピーカ振動板においては、音
速は充分に期待できるが、内部損失に欠ける欠点があ
る。Generally, it is necessary for each physical property required for a diaphragm to have a good balance. For example, in a conventional speaker diaphragm formed by FRP using a single carbon fiber, the sound velocity can be expected sufficiently. , There is a defect that lacks internal loss.
これに対して上記のようにして得られたコーン型振動板
１の物性は、音速が3500m/sec.、内部損失tanδ0.04で
あって、音速と内部損失のバランスが良好であり、ま
た、比重は1.2と軽量であって能率も損なわれることが
なく、鳴きの少ないものであった。On the other hand, the physical properties of the cone-type diaphragm 1 obtained as described above have a sound velocity of 3500 m / sec. And an internal loss tan δ0.04, and have a good balance between the sound velocity and the internal loss. It had a low specific gravity of 1.2, efficiency was not impaired, and there was little squeaking.
第２図は他の高強度・高弾性率繊維４として、全芳香族
ポリアミド繊維4bを使用したものであるが、このような
全芳香族繊維においては比重が1.45であるから、上記高
強度・高弾性率ポリエチレン繊維３（比重0.97）と交織
した場合の振動板比重は約1.1となり、振動板が更に軽
量となって比弾性率、比剛性が上昇する。FIG. 2 shows the case where the wholly aromatic polyamide fiber 4b is used as the other high-strength / high-modulus fiber 4, and the specific gravity of such wholly aromatic fiber is 1.45. The specific gravity of the diaphragm when it is woven with the high elastic modulus polyethylene fiber 3 (specific gravity 0.97) is about 1.1, and the diaphragm becomes lighter and the specific elastic modulus and the specific rigidity are increased.
超延伸したポリビニールアルコール（PVA）繊維や超延
伸したオレフィン系繊維（ポリプロピレン繊維等）も上
記した他の高強度・高弾性率繊維４として用いることが
でき、これによって振動板が更に軽量となる。Super-stretched polyvinyl alcohol (PVA) fibers and super-stretched olefin fibers (polypropylene fibers, etc.) can also be used as the other high-strength, high-modulus fibers 4 described above, which further reduces the weight of the diaphragm. .
なお、上記した交織に際しては要求される音質に応じて
任意にその交織割合を調整することができ、また、上記
したように振動板全体をPEプリプレグ布で成形すること
ができるのは勿論、PEプリプレグ布同士を積層したり、
異種の裏材との積層も可能である。In addition, in the above-mentioned interweaving, the interweaving ratio can be arbitrarily adjusted according to the required sound quality, and as a matter of course, the entire diaphragm can be formed of PE prepreg cloth as described above. Laminating prepreg cloths together,
Lamination with different kinds of backing materials is also possible.
「発明の効果」 本発明に係るスピーカ用振動板によれば、振動板の全体
又は少なくとも表面層が、弾性率4500Kg/mm2以上を有す
る高強度・高弾性率ポリエチレン繊維と他の高強度・高
弾性率繊維とを交織した交織布と樹脂とにより成形され
ているから、従来の紙パルプ振動板に比して比弾性率、
比剛性に優れているのは勿論、従来の炭素繊維FRPによ
る振動板に比して比重が小さいために軽量化でき、しか
も内部損失が大きく、高域での材料鳴きを抑えることが
できる。“Effect of the Invention” According to the speaker diaphragm of the present invention, the whole or at least the surface layer of the diaphragm has a high-strength / high-modulus polyethylene fiber having an elastic modulus of 4500 Kg / mm 2 or more and other high strength / Since it is formed of a resin and a woven cloth that is woven with high elastic modulus fibers, the specific elastic modulus is higher than that of a conventional paper pulp diaphragm.
In addition to being excellent in specific rigidity, it is possible to reduce the weight because it has a smaller specific gravity than the conventional carbon fiber FRP diaphragm, and moreover, it has a large internal loss and can suppress material squeaking in high frequencies.
また、交織すべき他の高強度・高弾性率繊維を適宜選択
することにより音質に応じた交織が可能であり、目的と
する特性を備えた振動板を得ることができる等の効果が
ある。Further, by appropriately selecting other high-strength / high-modulus fibers to be woven, it is possible to woven according to the sound quality, and it is possible to obtain a diaphragm having desired characteristics.
更に、従来の混抄振動板に比べて短繊維を使用していな
いために音速は著しく改善されている。Furthermore, the speed of sound is remarkably improved as compared with the conventional mixed sheet vibration plate because no short fibers are used.
図面は本発明に係るスピーカ用振動板の実施例を示し、
第１図は一部を断面した斜視図、第２図は他の構成例を
示す一部を断面した斜視図である。 1:コーン型振動板全体、2:交織布 3:高強度・高弾性率ポリエチレン繊維 4:他の高強度・高弾性率繊維、4a:炭素繊維 4b:全芳香族系繊維、5:樹脂、6:エッジThe drawings show an embodiment of a speaker diaphragm according to the present invention,
FIG. 1 is a partially sectional perspective view, and FIG. 2 is a partially sectional perspective view showing another configuration example. 1: whole cone type diaphragm, 2: mixed woven fabric 3: high strength / high elastic modulus polyethylene fiber 4: other high strength / high elastic modulus fiber, 4a: carbon fiber 4b: wholly aromatic fiber, 5: resin, 6: Edge
───────────────────────────────────────────────────── フロントページの続き (72)発明者 白崎 義一 滋賀県大津市堅田２丁目１番１号 (56)参考文献 特開 昭62−157500（ＪＰ，Ａ) 特開 昭53−96822（ＪＰ，Ａ) 実開 昭60−160694（ＪＰ，Ｕ) 実開 昭58−26291（ＪＰ，Ｕ) 実開 昭62−39395（ＪＰ，Ｕ) 実開 昭57−104697（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshikazu Shirasaki 2-1-1 Katata, Otsu City, Shiga Prefecture (56) References JP 62-157500 (JP, A) JP 53-96822 (JP, A) Actually open 60-160694 (JP, U) Actually open 58-26291 (JP, U) Actually open 62-39395 (JP, U) Actually open 57-104697 (JP, U)
Claims (5)
弾性率繊維よりなる織物で強化されたビニルエステルに
よる樹脂層からなる構造を有し、前記織物が弾性率4500
Kg/mm2以上を有する高強度・高弾性率ポリエチレン繊維
と他の高強度・高弾性率繊維とを交織して得られた織物
であることを特徴とするスピーカ用振動板。1. A structure in which at least a surface layer of a diaphragm has a structure made of a vinyl ester resin layer reinforced with a woven fabric made of high-strength and high elastic modulus fibers, and the woven fabric has an elastic modulus of 4500.
A diaphragm for a speaker, which is a woven fabric obtained by weaving high-strength, high-modulus polyethylene fibers having a Kg / mm 2 or more with other high-strength, high-modulus fibers.
ることを特徴とする特許請求の範囲第１項記載のスピー
カ用振動板。2. The speaker diaphragm according to claim 1, wherein the other high-strength and high-modulus fiber is carbon fiber.
維であることを特徴とする特許請求の範囲第１項記載の
スピーカ用振動板。3. The speaker diaphragm according to claim 1, wherein the other high-strength and high-modulus fibers are wholly aromatic fibers.
維を超延伸することによって得られたポリビニールアル
コール繊維であることを特徴とする特許請求の範囲第１
項記載のスピーカ用振動板。4. The other high-strength / high-modulus fiber is polyvinyl alcohol fiber obtained by super-drawing the fiber in solution spinning.
A diaphragm for a speaker according to the item.
る繊維を超延伸することによって得られたオレフィン系
繊維であることを特徴とする特許請求の範囲第１項記載
のスピーカ用振動板。5. The speaker vibration according to claim 1, wherein the other high-strength and high-modulus fiber is an olefin fiber obtained by super-drawing the fiber by solution spinning. Board.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301423A JPH0787634B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
| US07/276,940 US5031720A (en) | 1987-12-01 | 1988-11-28 | Speaker diaphragm |
| EP19880119989 EP0322587B1 (en) | 1987-12-01 | 1988-11-30 | Speaker diaphragm |
| DE19883852941 DE3852941T2 (en) | 1987-12-01 | 1988-11-30 | Speaker cone. |
| DE1988119989 DE322587T1 (en) | 1987-12-01 | 1988-11-30 | SPEAKER MEMBRANE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301423A JPH0787634B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01144893A JPH01144893A (en) | 1989-06-07 |
| JPH0787634B2 true JPH0787634B2 (en) | 1995-09-20 |
Family
ID=17896697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62301423A Expired - Fee Related JPH0787634B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787634B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6240893B2 (en) * | 2013-11-12 | 2017-12-06 | パナソニックＩｐマネジメント株式会社 | Diaphragm and loudspeaker using the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396822A (en) * | 1977-02-02 | 1978-08-24 | Sanyo Electric Co Ltd | Production of diaphragme for speaker |
| JPS57104697U (en) * | 1980-12-19 | 1982-06-28 | ||
| JPS5826291U (en) * | 1981-08-14 | 1983-02-19 | 東レ株式会社 | Diaphragm for speaker |
| JPS60160694U (en) * | 1984-04-02 | 1985-10-25 | 日本コロムビア株式会社 | Diaphragm for speaker |
| JPS6239395U (en) * | 1985-08-28 | 1987-03-09 | ||
| JPS62157500A (en) * | 1985-12-28 | 1987-07-13 | Agency Of Ind Science & Technol | Acoustic diaphragm |
-
1987
- 1987-12-01 JP JP62301423A patent/JPH0787634B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01144893A (en) | 1989-06-07 |
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