JPH0490297A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPH0490297A JPH0490297A JP20540590A JP20540590A JPH0490297A JP H0490297 A JPH0490297 A JP H0490297A JP 20540590 A JP20540590 A JP 20540590A JP 20540590 A JP20540590 A JP 20540590A JP H0490297 A JPH0490297 A JP H0490297A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- fiber
- powder
- speaker
- internal loss
- 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
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 41
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 11
- 239000004917 carbon fiber Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 210000004177 elastic tissue Anatomy 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 239000002759 woven fabric Substances 0.000 claims description 9
- 239000000088 plastic resin Substances 0.000 claims description 2
- -1 polypropylene Polymers 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 239000004743 Polypropylene Substances 0.000 abstract description 6
- 229920001155 polypropylene Polymers 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000004744 fabric Substances 0.000 abstract 3
- 238000000465 moulding Methods 0.000 description 8
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005653 propylene-ethylene copolymer Polymers 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、スピーカ用振動板、特にダイナミ・νり型ス
ピーカの振動板に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a diaphragm for a speaker, particularly a diaphragm for a dynamic type speaker.
［従来の技術］
スピーカの振動板は、周知の様に、中心部または周辺部
のごとく振動板の局限された一部分が、ボイスコイルに
よって駆動されて音波を放射するが、振動板を構成する
素材が完全な剛体でないため、極低周波帯域を除きピス
トン運動を行うことは困難で、通常は高次の分割振動モ
ードとなって周波数特性が劣化するので、ピストン運動
帯域を可能な限り高周波帯域まで拡げ、且つ生じた分割
振動を抑制するために振動板を構成する材料と１゜て、
出来るだけ剛性が大きく且つ振動エネルギー吸収能力が
比較的大きいことを要求される。[Prior Art] As is well known, the diaphragm of a speaker emits sound waves when a localized part of the diaphragm, such as the center or the periphery, is driven by a voice coil. Since it is not a completely rigid body, it is difficult to perform piston motion except in the extremely low frequency band, and normally it becomes a high-order split vibration mode and the frequency characteristics deteriorate. 1° with the material constituting the diaphragm in order to expand and suppress the resulting split vibration.
It is required to have as much rigidity as possible and a relatively high vibration energy absorption capacity.
従来における振動板の代表的な構造は、例えば（１）パ
ルプ、金属、樹脂等単一の素材を成型したもの、（２）
炭素繊維織布等に熱硬化性樹脂を含浸させて加熱成型し
たもの、（３）炭素繊維織布等と熱可塑性樹脂シートを
積層し、加熱成型したもの等が実用化されている。Typical structures of conventional diaphragms include (1) those molded from a single material such as pulp, metal, or resin; (2)
In practical use, carbon fiber woven fabric or the like is impregnated with a thermosetting resin and heated and molded, and (3) carbon fiber woven fabric or the like is laminated with a thermoplastic resin sheet and heated and molded.
［解決しようとする課題］
この様な構造を有する従来の振動板において、上記（１
）に属するスピーカ用振動板は素材の性質によって剛性
と吸振力とを両立させることは困難であり、（２）に属
するスピーカ用振動板は、結合材が熱硬化性樹脂である
ため耐衝撃性、耐水性、長期安定性が低い。更に生産時
の成型サイクルが長く、且つ成型材料をプリプレグの状
態としたものは保存性が良くない。そして、（３）に属
する振動板は、例えば熱可塑性樹脂にポリプロピレン樹
脂を使用した場合には、成型時のドレープが悪いため、
高圧プレスを要するという解決すべき課題があった。[Problem to be solved] In the conventional diaphragm having such a structure, the above (1)
It is difficult for speaker diaphragms belonging to category (2) to have both rigidity and vibration absorption power due to the properties of the material, and speaker diaphragms belonging to category (2) have poor impact resistance because the bonding material is thermosetting resin. , poor water resistance and long-term stability. Furthermore, the molding cycle during production is long, and the molding material in the prepreg state does not have good storage stability. In the case of a diaphragm belonging to (3), for example, when polypropylene resin is used as the thermoplastic resin, the drape during molding is poor.
There was a problem that needed to be solved, which required a high-pressure press.
そこで本発明は、上記従来例の有する課題を解決して、
剛性と内部損失（ｔａｎδ）の値の高いスピーカ用振動
板を提供することを目的とする。Therefore, the present invention solves the problems of the above-mentioned conventional example, and
An object of the present invention is to provide a speaker diaphragm with high rigidity and high internal loss (tan δ) values.
［課題を解決するための手段］
上記した目的を達成するための本発明に係るスピーカ用
振動板は、無機質高弾性繊維を熱可塑性樹脂管に入れ、
該熱可塑性樹脂管内の間隙を該熱可塑性樹脂管と同じ材
質の熱可塑性樹脂粉末で充填した繊維束よりなる織布を
加熱し、熱可塑性樹脂部を均一に溶融成型したことを特
徴とするスピーカ用振動板であり、上記無機質高弾性繊
維が炭素繊維であること特徴とするスピーカ用振動板で
ある。[Means for Solving the Problems] A speaker diaphragm according to the present invention for achieving the above-mentioned object includes high elastic inorganic fibers placed in a thermoplastic resin tube,
A speaker characterized in that the thermoplastic resin portion is uniformly melted and molded by heating a woven fabric made of fiber bundles in which the gap in the thermoplastic resin tube is filled with thermoplastic resin powder of the same material as the thermoplastic resin tube. This is a diaphragm for a speaker, characterized in that the inorganic high elastic fiber is carbon fiber.
［作用］
本発明に係るスピーカ用振動板のように無機質高弾性繊
維が、均一に熱可塑性樹脂によって溶融結合し複合化さ
れていると、常温で内部損失が大きく且つ低密度の熱可
塑性樹脂を使用することで、複合材の見掛上の密度を低
くすることができるので、（ヤング率Ｅ／密度ρ）と内
部損失ｔａｎδの値を共に大きくすることができる。[Function] When inorganic high-elastic fibers are uniformly melt-bonded and composited with a thermoplastic resin as in the speaker diaphragm according to the present invention, the thermoplastic resin has a large internal loss at room temperature and a low density. By using it, the apparent density of the composite material can be lowered, so that both the values of (Young's modulus E/density ρ) and the internal loss tan δ can be increased.
従来、無機質高弾性繊維と熱可塑性樹脂との複合化は、
無機質高弾性繊維織布シートの両側から熱可塑性樹脂シ
ートを熱圧着して複合シートを作成し、この複合シート
を所定形状にプレス成型する方式によっていたが、この
複合シートの状態では熱可塑性樹脂シート自体の伸びが
悪く、且つプレス時の熱の伝達が悪いため、プレス圧力
を高める必要があり、更に成型後の熱可塑性樹脂の分布
が不均一なものしか出来なかったのに対し、本発明の構
成では熱可塑性樹脂の分布が均一となる。Conventionally, the composite of inorganic high elastic fiber and thermoplastic resin was
Previously, a composite sheet was created by thermo-compression bonding thermoplastic resin sheets on both sides of an inorganic high-elastic fiber woven fabric sheet, and this composite sheet was press-molded into a predetermined shape. Because the thermoplastic resin itself has poor elongation and poor heat transfer during pressing, it is necessary to increase the pressing pressure, and the distribution of the thermoplastic resin after molding can only be uneven. In this configuration, the distribution of the thermoplastic resin is uniform.
また、熱可塑性樹脂を使用しているので耐衝撃性、耐水
性、長期安定性並びに保存性に優れている。In addition, since thermoplastic resin is used, it has excellent impact resistance, water resistance, long-term stability, and storage stability.
その上、従来の熱可塑性樹脂複合材と比較してドレープ
性、濡れ性にすぐれているのでボイドがなく品質が安定
する。Furthermore, it has superior drape and wettability compared to conventional thermoplastic resin composite materials, so it has no voids and stable quality.
［実施例］
無機質高弾性繊維に炭素繊維を用い、熱可塑性樹脂粉末
にポリプロピレンの粉末を使用し、この粉末を前記炭素
繊維の一本一本に付着させ、これを、熱可塑性樹脂にポ
リプロピレンを用いた管で、覆うことにより繊維束を作
製する。この繊維束を平織した織布を遠赤外線ヒーター
で加熱し、熱可塑性樹脂部が溶融する直前に、コーン形
状の金型でプレスすることにより本発明に係るスピーカ
用振動板が得られる。なお本実施例におけるスピーカ用
振動板の特性は、ヤング率Ｅ＝１．４６Ｘ１０” ｄｙ
ｎｅ／ｃｉ、密度ρ＝１． １８ｇ／ｃｍ３ｔａｎδ＝
０．０４１である。[Example] Carbon fiber is used as the inorganic high modulus fiber, polypropylene powder is used as the thermoplastic resin powder, this powder is attached to each of the carbon fibers, and the polypropylene is applied to the thermoplastic resin. A fiber bundle is prepared by covering the tube with the used tube. The speaker diaphragm according to the present invention is obtained by heating a plain-woven woven fabric of this fiber bundle with a far-infrared heater and pressing it with a cone-shaped mold immediately before the thermoplastic resin portion melts. The characteristics of the speaker diaphragm in this example are Young's modulus E=1.46×10” dy
ne/ci, density ρ=1. 18g/cm3tanδ=
It is 0.041.
次回は、ポリプロピレンシートで炭素繊維織布シートを
両面から熱圧着して得られる従来のものと、本発明のも
のの成型時間と成型品の曲げ強度を示したもので、本発
明のものは、熱可塑性樹脂の分散性が良く、短時間で最
高強度に達する。また成型圧力も小さ〈従来のもので同
強度を得るには２０ｋｇ１０ｆｆ必要である。Next time, we will show the molding time and bending strength of the conventional and inventive products obtained by thermocompression bonding a carbon fiber woven fabric sheet from both sides with a polypropylene sheet. The plastic resin has good dispersibility and reaches maximum strength in a short time. Also, the molding pressure is low (20 kg and 10 ff are required to obtain the same strength with conventional products).
本発明の複合材を構成する無機質高弾性繊維としては、
実施例の炭素繊維以外にガラス繊維等が使用でき、また
熱可塑性樹脂にはポリエチレン、ナイロン、ポリプロピ
レンエチレン共重合体、ポリアミドイミド等、広範囲の
汎用プラスティック、汎用エンジニアリングプラスティ
ック、汎用スーパーエンジニアリングプラスティックを
随時使用することができる。The inorganic high elastic fibers constituting the composite material of the present invention include:
In addition to the carbon fibers used in the examples, glass fibers can be used, and a wide range of general-purpose plastics, general-purpose engineering plastics, and general-purpose super engineering plastics can be used as thermoplastic resins, such as polyethylene, nylon, polypropylene ethylene copolymer, polyamide-imide, etc. can do.
以上、本発明に係るスピーカ用振動板について代表的と
思われる実施例を基に詳述したが、本発明によるスピー
カ用振動板の実施態様は、素材、樹脂の材質等において
、上記実施例の構造に限定されるものではなく、前記し
たクレーム記載の構成要件を具備し、本発明にいう作用
を呈し、以下に述べる効果を有する限りにおいて、適宜
改変して実施しうるちのである。Above, the speaker diaphragm according to the present invention has been described in detail based on the examples considered to be representative, but the embodiment of the speaker diaphragm according to the present invention differs from the above embodiments in terms of materials, resin materials, etc. The present invention is not limited to the structure, and may be implemented with appropriate modifications as long as it has the constituent features described in the claims described above, exhibits the functions of the present invention, and has the effects described below.
［効果］
本発明に係るスピーカ用振動板は、無機質高弾性繊維に
熱可塑性樹脂粉末を付着させ、これを熱可塑性樹脂管に
入れた繊維束よりなる織布を加熱し、熱可塑性樹脂部を
均一に溶融成型したことによって、高剛性であると共に
、複合材の見掛上の密度を低くすることができるので、
Ｅ／ρとｔａｎδの値を共に大きくすることができる。[Effect] The speaker diaphragm according to the present invention is produced by attaching thermoplastic resin powder to inorganic high-elastic fibers, heating a woven fabric made of a fiber bundle in which the thermoplastic resin powder is placed in a thermoplastic resin tube, and removing the thermoplastic resin portion. By uniformly melting and molding, it is possible to achieve high rigidity and lower the apparent density of the composite material.
Both the values of E/ρ and tanδ can be increased.
また、熱可塑性樹脂を使用しているので、耐衝撃性、耐
水性、長期安定性並びに保存性に優れ、炭素繊維間が熱
可塑性樹脂で充填され、これを熱可塑性樹脂管にいれた
繊維束とし、これにより織布をなすので無機質高弾性繊
維と熱可塑性樹脂が相互に接近した状態で成型されるの
で、熱伝導が良好で生産性が良く、成型時間を短縮する
ことができる。そして、熱可塑性樹脂の分布が均一きな
るため、従来の熱可塑性樹脂複合材と比較して、ドレー
プ性、濡れ性に優れているのでボイドが無く品質が安定
するという効果を有する。In addition, since thermoplastic resin is used, it has excellent impact resistance, water resistance, long-term stability, and storage stability.The spaces between the carbon fibers are filled with thermoplastic resin, and the fiber bundle is placed in a thermoplastic resin tube. Since this forms a woven fabric, the inorganic high elastic fibers and thermoplastic resin are molded in close proximity to each other, resulting in good heat conduction, high productivity, and short molding time. Furthermore, since the distribution of the thermoplastic resin is uniform, it has excellent drapability and wettability compared to conventional thermoplastic resin composite materials, and has the effect of being free of voids and having stable quality.
図面は、本発明の実施例に係るスピーカ用振動板吉従来
のスピーカ用振動板の成型時間と曲げ強度を示したもの
である。
特許出願人 オンキョー株式会社The drawings show the molding time and bending strength of the speaker diaphragm according to the embodiment of the present invention and the conventional speaker diaphragm. Patent applicant Onkyo Corporation
Claims (2)
可塑性樹脂管内の間隙を該熱可塑性樹脂管と同じ材質の
熱可塑性樹脂粉末で充填した繊維束よりなる織布を加熱
し、熱可塑性樹脂部を均一に溶融成型したことを特徴と
するスピーカ用振動板。(1) Inorganic high modulus fibers are placed in a thermoplastic resin tube, and the gaps in the thermoplastic resin tube are filled with thermoplastic resin powder of the same material as the thermoplastic resin tube.A woven fabric made of a fiber bundle is heated. A speaker diaphragm characterized by having a plastic resin part uniformly melt-molded.
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 inorganic high elastic fiber is carbon fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20540590A JPH0490297A (en) | 1990-08-01 | 1990-08-01 | Diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20540590A JPH0490297A (en) | 1990-08-01 | 1990-08-01 | Diaphragm for speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0490297A true JPH0490297A (en) | 1992-03-24 |
Family
ID=16506296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20540590A Pending JPH0490297A (en) | 1990-08-01 | 1990-08-01 | Diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0490297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018050169A (en) * | 2016-09-21 | 2018-03-29 | 東レプラスチック精工株式会社 | Speaker component, manufacturing method of the same, and speaker |
-
1990
- 1990-08-01 JP JP20540590A patent/JPH0490297A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018050169A (en) * | 2016-09-21 | 2018-03-29 | 東レプラスチック精工株式会社 | Speaker component, manufacturing method of the same, and speaker |
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