JPH0775197A - Voice coil bobbin - Google Patents
Voice coil bobbinInfo
- Publication number
- JPH0775197A JPH0775197A JP24378993A JP24378993A JPH0775197A JP H0775197 A JPH0775197 A JP H0775197A JP 24378993 A JP24378993 A JP 24378993A JP 24378993 A JP24378993 A JP 24378993A JP H0775197 A JPH0775197 A JP H0775197A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- voice coil
- coil bobbin
- pibt
- polyimide
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、スピーカに用いられる
ボイスコイルボビンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice coil bobbin used for a speaker.
【０００２】[0002]
【従来の技術】周知のように、スピーカに用いられるボ
イスコイルボビンの特性には、(1) ボイスコイルに発生
するジュール熱を放熱するために、熱伝導性、熱放射性
が良好であること、(2) ジュール熱によって変形しない
よう、耐熱性に優れていること、(3) ボイスコイルの振
動を正確に振動板に伝えるために、軽量で高剛性である
こと、(4) コイルの過電流によって発火しないよう、難
燃性、不燃性に優れていること、等が要求されている。2. Description of the Related Art As is well known, the characteristics of a voice coil bobbin used in a speaker are: (1) good thermal conductivity and heat radiation in order to dissipate Joule heat generated in the voice coil; 2) It has excellent heat resistance so that it will not be deformed by Joule heat, (3) It is lightweight and highly rigid in order to accurately transmit the vibration of the voice coil to the diaphragm, and (4) due to the overcurrent of the coil. It is required to have excellent flame retardancy and incombustibility so that it will not ignite.
【０００３】そこで、このような特性を満足する従来の
ボイスコイルボビンとしては、アルミ箔、ポリイミドフ
ィルムを円筒形状に成形したものが用いられている。Therefore, as a conventional voice coil bobbin satisfying such characteristics, a cylindrical aluminum foil or polyimide film is used.
【０００４】[0004]
【発明が解決しようとする課題】しかし、このような従
来のボイスコイルボビンでは、その材料に、アルミ、ポ
リイミドを用いているが、アルミ、ポリイミドとも熱に
よる膨脹率が大きいため、コイルに発生するジュール熱
によるボイスコイルボビンの膨脹から、これに接着され
ているコイルとの接着性が維持できず、コイルとボイス
コイルボビンとの剥離が生じてしまう恐れがあった。However, in such a conventional voice coil bobbin, aluminum or polyimide is used as the material, but since the expansion coefficient of aluminum and polyimide is large, the joule generated in the coil is large. Due to the expansion of the voice coil bobbin due to heat, the adhesiveness between the coil and the coil bonded thereto cannot be maintained, and the coil and the voice coil bobbin may be peeled off.
【０００５】そこで本発明は、上記従来例に付する欠点
を解消し、高剛性を有し、耐熱性に優れるとともに、熱
による膨脹率が非常に小さいボイスコイルボビンを提供
することを目的とする。It is therefore an object of the present invention to provide a voice coil bobbin which eliminates the drawbacks of the conventional example, has high rigidity, is excellent in heat resistance, and has a very small expansion coefficient due to heat.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明に係るボイスコイルボビンは、請求項１では、
複素環ポリイミドにイミド環を導入してなる繊維２、５
を用いた織布と、シリコーン樹脂３からなる結合樹脂と
により構成されることを特徴とし、請求項２では、請求
項１記載のボイスコイルボビンであって、複素環ポリイ
ミドがポリ−ｐ−フェニレンベンゾビスチアゾールであ
り、繊維２がポリイミドベンゾチアゾールからなること
を特徴とし、請求項３では、請求項１記載のボイスコイ
ルボビンであって、複素環ポリイミドがポリ−ｐ−フェ
ニレンベンゾビスオキサゾールであり、繊維５がポリイ
ミドベンゾオキサゾールからなることを特徴とする。A voice coil bobbin according to the present invention for attaining the above object comprises:
Fibers 2 and 5 obtained by introducing an imide ring into a heterocyclic polyimide
The voice coil bobbin according to claim 1, wherein the heterocyclic polyimide is poly-p-phenylenebenzo. Bisthiazole, wherein the fiber 2 is composed of polyimide benzothiazole. In claim 3, the voice coil bobbin according to claim 1, wherein the heterocyclic polyimide is poly-p-phenylenebenzobisoxazole, 5 is composed of polyimide benzoxazole.
【０００７】[0007]
【作用】このようなボイスコイルボビンでは、チアゾー
ル環、オキサゾール環等の複素環を含む芳香族ジアミン
と無水ピロメリット酸との合成溶液を紡糸して、複素環
ポリイミドにイミド環が導入されて構成される繊維を得
る。この繊維は、チアゾール環、オキサゾール環等の複
素環とイミド環との相互にねじれた構造から紡糸工程に
おける熱処理時の結晶化が抑制され、特定方向に配向し
た後に結晶化されているため、高剛性を有し、耐熱性、
吸水率に優れ、熱に対する収縮性が非常に小さい。この
繊維を用いた織布にシリコーン樹脂を含浸し、熱乾燥し
て得られたシートを円筒形状に成形することによってボ
イスコイルボビンが構成される。In such a voice coil bobbin, a synthetic solution of an aromatic diamine containing a heterocycle such as a thiazole ring or an oxazole ring and pyromellitic dianhydride is spun to introduce an imide ring into a heterocyclic polyimide. To get the fiber. This fiber has a structure in which crystallization during heat treatment in the spinning process is suppressed due to the mutually twisted structure of a heterocycle such as a thiazole ring and an oxazole ring and an imide ring, and the crystallization is performed after being oriented in a specific direction. It has rigidity, heat resistance,
It has excellent water absorption and very little heat shrinkage. A voice coil bobbin is formed by impregnating a woven cloth using the fibers with a silicone resin and heat-drying the resulting sheet to form a cylindrical shape.
【０００８】[0008]
【実施例】以下に、本発明の実施例を詳述する。EXAMPLES Examples of the present invention will be described in detail below.
【０００９】図１は本発明の実施例におけるボイスコイ
ルボビンを説明する図であり、図２は本発明の実施例に
おけるボイスコイルボビンに用いた繊維の生成装置を説
明する図である。 ［実施例１］ 実施例１では、チアゾール環を含む芳香
族ジアミンと無水ピロメリット酸とを合成した溶液を、
図２に示すような生成装置に流入し、紡糸温度１４０〜
１７０℃、押出し圧力２００〜４００Ｋｇ／ｃｍ2 で紡
糸を行った。図において、６は紡糸溶液、７は溶液槽、
８は孔径０．１６ｍｍである紡糸口金、９は凝固浴槽、
１０は水洗浴槽である。次いで、水で残存溶媒を除去
し、風乾を行った後、５００〜６００℃の熱処理を行っ
た。これにより、化１で示すような、ＰＢＴにイミド環
が導入されて構成される、繊度２５デニールのポリイミ
ドベンゾチアゾール（以下、ＰＩＢＴと記す）繊維を生
成した。FIG. 1 is a diagram for explaining a voice coil bobbin in an embodiment of the present invention, and FIG. 2 is a diagram for explaining a fiber producing device used in the voice coil bobbin in the embodiment of the present invention. Example 1 In Example 1, a solution prepared by synthesizing an aromatic diamine containing a thiazole ring and pyromellitic dianhydride,
It flows into the production device as shown in FIG.
Spinning was performed at 170 ° C. and an extrusion pressure of 200 to 400 Kg / cm 2 . In the figure, 6 is a spinning solution, 7 is a solution tank,
8 is a spinneret having a hole diameter of 0.16 mm, 9 is a coagulation bath,
10 is a washing bath. Then, the residual solvent was removed with water, air-drying was performed, and then heat treatment at 500 to 600 ° C. was performed. As a result, a polyimide benzothiazole (hereinafter referred to as PIBT) fiber having a fineness of 25 denier, which was formed by introducing an imide ring into PBT as shown in Chemical formula 1, was produced.
【００１０】[0010]
【化１】 このＰＩＢＴ繊維を２５０００本／ｍ2 に平織りして、
坪量１５４ｇ／ｃｍ2の織布を形成した。この織布にシ
リコーン樹脂を重量比５〜１０％含浸し、１００〜１２
０℃下で熱乾燥して、成形シートを得た。この成形シー
トを治具を用いて円筒形状にした後、ＳＶＯ接着剤によ
り接着して、図１に示すような実施例１のボイスコイル
ボビン１を得た。図において、２はＰＩＢＴ繊維であ
り、４はシリコーン樹脂である。 ［実施例２］実施例２では、オキサゾール環を含む芳香
族ジアミンと無水ピロメリット酸とを合成した溶液を、
実施例１と同じく図２の生成装置に流入し、紡糸温度１
４０〜１７０℃、押出し圧力２００〜４００Ｋｇ／ｃｍ
2 で紡糸を行った。次いで、水で残存溶媒を除去し、風
乾を行った後、５００〜６００℃の熱処理を行った。こ
れにより、化２で示すような、ＰＢＯにイミド環が導入
されて構成される、繊度３０デニールのポリイミドベン
ゾオキサゾール（以下、ＰＩＢＯと記す）繊維を生成し
た。[Chemical 1] Plain weave this PIBT fiber to 25000 fibers / m 2 ,
A woven fabric having a basis weight of 154 g / cm 2 was formed. This woven fabric is impregnated with a silicone resin in a weight ratio of 5 to 10%, and 100 to 12
It heat-dried at 0 degreeC and the molded sheet was obtained. This molded sheet was formed into a cylindrical shape using a jig and then adhered with an SVO adhesive to obtain a voice coil bobbin 1 of Example 1 as shown in FIG. In the figure, 2 is a PIBT fiber and 4 is a silicone resin. [Example 2] In Example 2, a solution prepared by synthesizing an aromatic diamine containing an oxazole ring and pyromellitic dianhydride,
As in Example 1, it was introduced into the production apparatus of FIG.
40-170 ° C., extrusion pressure 200-400 Kg / cm
Spinning was performed at 2 . Then, the residual solvent was removed with water, air-drying was performed, and then heat treatment at 500 to 600 ° C. was performed. As a result, a polyimide benzoxazole (hereinafter referred to as PIBO) fiber having a fineness of 30 denier, which was formed by introducing an imide ring into PBO as shown in Chemical formula 2, was produced.
【００１１】[0011]
【化２】 このＰＩＢＴ繊維を２９７００本／ｍ2 に平織りして、
坪量１８３ｇ／ｃｍ2の織布を形成した。この織布にシ
リコーン樹脂を重量比５〜１０％含浸し、１００〜１２
０℃下で熱乾燥して、成形シートを得た。この成形シー
トを治具を用いて円筒形状にした後、ＳＶＯ接着剤によ
り接着して、図１に示すような実施例２のボイスコイル
ボビン４を得た。図において、５はＰＩＢＯ繊維であ
る。[Chemical 2] Plain weave this PIBT fiber to 29,700 fibers / m 2 ,
A woven fabric having a basis weight of 183 g / cm 2 was formed. This woven fabric is impregnated with a silicone resin in a weight ratio of 5 to 10%, and 100 to 12
It heat-dried at 0 degreeC and the molded sheet was obtained. This molded sheet was formed into a cylindrical shape using a jig and then adhered with an SVO adhesive to obtain a voice coil bobbin 4 of Example 2 as shown in FIG. In the figure, 5 is a PIBO fiber.
【００１２】次に、実施例１、実施例２のボイスコイル
ボビンの特性を、従来例のボイスコイルの特性とともに
表１に示す。ここで、従来例１はアルミ箔を成形したも
のであり、従来例２はポリイミドフィルムを成形したも
のである。Next, the characteristics of the voice coil bobbins of Examples 1 and 2 are shown in Table 1 together with the characteristics of the conventional voice coil. Here, Conventional Example 1 is a molded aluminum foil, and Conventional Example 2 is a molded polyimide film.
【００１３】[0013]
【表１】 表１から明らかなように、実施例１、実施例２のボイス
コイルボビンは、熱変形温度が３００℃と非常に高く、
そして、従来例のボイスコイルボビンと比較して、（Ａ
ＳＴＭ−Ｄ６９６に基く測定による）線膨脹係数が非常
に小さく、このため、熱に対する安定性が非常に高い。
また、吸水率も非常に小さく優れた値となっている。更
に、比重、曲げ剛性も従来のボイスコイルボビンと略同
様の値であり、軽量、高剛性であるため、本実施例のボ
イスコイルボビンは非常に優れた特性を有する。[Table 1] As is clear from Table 1, the voice coil bobbins of Examples 1 and 2 have a very high heat distortion temperature of 300 ° C.,
Then, in comparison with the conventional voice coil bobbin, (A
The coefficient of linear expansion (measured according to STM-D696) is very small, which makes it very stable to heat.
In addition, the water absorption rate is also extremely small and excellent. Further, the specific gravity and bending rigidity are substantially the same values as those of the conventional voice coil bobbin, and the voice coil bobbin of this embodiment has very excellent characteristics because it is lightweight and highly rigid.
【００１４】以上、本発明に係るボイスコイルボビンに
ついて代表的と思われる実施例を基に詳述したが、本発
明によるボイスコイルボビンの実施態様は、上記実施例
の構造に限定されるものではなく、前記した特許請求の
範囲に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
して実施しうるものである。Although the voice coil bobbin according to the present invention has been described above in detail based on the considered typical embodiment, the embodiment of the voice coil bobbin according to the present invention is not limited to the structure of the above embodiment. The present invention can be appropriately modified and implemented as long as it has the constituent features described in the above-mentioned claims, exhibits the action of the present invention, and has the effects described below.
【００１５】[0015]
【効果】本発明に係るボイスコイルボビンでは、ポリ−
ｐ−フェニレンベンゾビスチアゾール、ポリ−ｐ−フェ
ニレンベンゾビスオキサゾール等の複素環ポリイミドに
イミド環を導入してなる、ポリイミドベンゾチアゾー
ル、ポリイミドベンゾオキサゾール等の繊維を用いた織
布と、シリコーン樹脂からなる結合樹脂とにより構成さ
れるものであり、この繊維が、チアゾール環、オキサゾ
ール環等の複素環とイミド環との相互にねじれた構造か
ら紡糸工程における熱処理時の結晶化が抑制され、特定
方向に配向した後に結晶化されていることから高剛性を
有し、耐熱性に優れ、熱による膨張率、吸水率が非常に
小さいため、本発明のボイスコイルボビンは、剛性が高
いとともに、ボイスコイルに発生するジュール熱に対し
て変形、膨脹しない、また高湿度下でも変形しない、非
常に高い安定性を有するものである。[Effect] In the voice coil bobbin according to the present invention,
A woven fabric using fibers such as polyimide benzothiazole and polyimide benzoxazole, which is obtained by introducing an imide ring into a heterocyclic polyimide such as p-phenylene benzobisthiazole and poly-p-phenylene benzobisoxazole, and a silicone resin. This fiber is composed of a binding resin, and this fiber has a structure in which crystallization during heat treatment in the spinning process is suppressed due to a structure in which a heterocycle such as a thiazole ring and an oxazole ring and an imide ring are twisted with each other, and Since it is crystallized after being oriented, it has high rigidity, is excellent in heat resistance, and has a very small coefficient of thermal expansion and water absorption. Therefore, the voice coil bobbin of the present invention has high rigidity and is generated in the voice coil. It has a very high stability that it does not deform or expand with respect to Joule heat, and it does not deform even under high humidity. Is shall.
【図１】本発明の実施例におけるボイスコイルボビンを
説明する図。FIG. 1 is a diagram illustrating a voice coil bobbin according to an embodiment of the present invention.
【図２】本発明の実施例におけるボイスコイルボビンに
用いた繊維の生成装置を説明する図。FIG. 2 is a diagram illustrating a fiber generation device used in a voice coil bobbin according to an embodiment of the present invention.
１，４ ボイスコイルボビン ２ ＰＩＢＴ繊維 ３ シリコーン樹脂 ５ ＰＩＢＯ繊維 ６ 紡糸溶液 ７ 溶液槽 ８ 紡糸口金 ９ 凝固浴槽 １０ 水洗浴槽 1,4 Voice coil bobbin 2 PIBT fiber 3 Silicone resin 5 PIBO fiber 6 Spinning solution 7 Solution tank 8 Spinneret 9 Coagulation bath 10 Washing bath
Claims (3)
ンにおいて、複素環ポリイミドにイミド環を導入してな
る繊維（２、５）を用いた織布と、シリコーン樹脂
（３）からなる結合樹脂とにより構成されることを特徴
とするボイスコイルボビン。1. A voice coil bobbin used for a speaker, comprising a woven fabric using fibers (2, 5) obtained by introducing an imide ring into a heterocyclic polyimide, and a binding resin made of a silicone resin (3). A voice coil bobbin characterized in that
ンベンゾビスチアゾールであり、繊維（２）がポリイミ
ドベンゾチアゾールからなることを特徴とする請求項１
記載のボイスコイルボビン。2. The heterocyclic polyimide is poly-p-phenylenebenzobisthiazole, and the fiber (2) is composed of polyimidebenzothiazole.
Voice coil bobbin as described.
ンベンゾビスオキサゾールであり、繊維（５）がポリイ
ミドベンゾオキサゾールからなることを特徴とする請求
項１記載のボイスコイルボビン。3. The voice coil bobbin according to claim 1, wherein the heterocyclic polyimide is poly-p-phenylenebenzobisoxazole and the fiber (5) is composed of polyimidebenzoxazole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378993A JPH0775197A (en) | 1993-09-03 | 1993-09-03 | Voice coil bobbin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24378993A JPH0775197A (en) | 1993-09-03 | 1993-09-03 | Voice coil bobbin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0775197A true JPH0775197A (en) | 1995-03-17 |
Family
ID=17108987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24378993A Pending JPH0775197A (en) | 1993-09-03 | 1993-09-03 | Voice coil bobbin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0775197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006135661A (en) * | 2004-11-05 | 2006-05-25 | Pioneer Electronic Corp | Voice coil device and its manufacturing method |
-
1993
- 1993-09-03 JP JP24378993A patent/JPH0775197A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006135661A (en) * | 2004-11-05 | 2006-05-25 | Pioneer Electronic Corp | Voice coil device and its manufacturing method |
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