JP3191509B2 - Voice coil bobbin - Google Patents

Voice coil bobbin

Info

Publication number
JP3191509B2
JP3191509B2 JP18900593A JP18900593A JP3191509B2 JP 3191509 B2 JP3191509 B2 JP 3191509B2 JP 18900593 A JP18900593 A JP 18900593A JP 18900593 A JP18900593 A JP 18900593A JP 3191509 B2 JP3191509 B2 JP 3191509B2
Authority
JP
Japan
Prior art keywords
voice coil
coil bobbin
polyimide
biaxially stretched
heterocyclic
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 - Fee Related
Application number
JP18900593A
Other languages
Japanese (ja)
Other versions
JPH0723499A (en
Inventor
武士 藤谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Onkyo Corp
Original Assignee
Onkyo Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Onkyo Corp filed Critical Onkyo Corp
Priority to JP18900593A priority Critical patent/JP3191509B2/en
Publication of JPH0723499A publication Critical patent/JPH0723499A/en
Application granted granted Critical
Publication of JP3191509B2 publication Critical patent/JP3191509B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【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 for a speaker include (1) good heat conductivity and heat radiation in order to radiate Joule heat generated in a voice coil; 2) Excellent heat resistance to prevent deformation due to Joule heat; (3) Lightweight and high rigidity to accurately transmit voice coil vibration to the diaphragm; (4) Due to coil overcurrent It is required to have excellent flame retardancy and nonflammability so as not to 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, an aluminum foil or a polyimide film formed into a cylindrical shape 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. However, since both aluminum and polyimide have a large expansion coefficient due to heat, the joule generated in the coil is high. Due to the expansion of the voice coil bobbin due to heat, the adhesiveness between the coil and the voice coil bobbin cannot be maintained, and the coil and the voice coil bobbin may be separated.

【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 an object of the present invention to provide a voice coil bobbin which solves the above-mentioned drawbacks of the prior art, 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構成される二軸
延伸フィルムを成形したことを特徴とし、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、二軸延伸フィルム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、二軸延伸フィルム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。
According to a first aspect of the present invention, there is provided a voice coil bobbin according to the present invention.
2. A voice coil bobbin according to claim 1, wherein a biaxially stretched film formed by introducing an imide ring into the heterocyclic polyimide is formed, wherein the heterocyclic polyimide is poly-p-phenylene. Benzobisthiazole, wherein the biaxially stretched film is made of polyimide benzothiazole. In claim 3, the voice coil bobbin according to claim 1, wherein the heterocyclic polyimide is poly-p-phenylene benzobisoxazole. Yes, the biaxially stretched film is made 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を合成することで、複素環ポリ
イミドにイミド環を導入した生成物が得られ、この生成
物を縦方向、横方向に延伸して、二軸延伸フィルムを形
成する。この二軸延伸フィルムは、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
造から延伸時の結晶化が抑制され、延伸により分子鎖が
十分に配向した後に結晶化されているため、高剛性を有
し、耐熱性に優れ、熱による膨張性が非常に小さい。こ
のフィルム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。
With such a voice coil bobbin, a product in which an imide ring is introduced into a heterocyclic polyimide can be obtained by synthesizing an aromatic diamine containing a heterocyclic ring such as a thiazole ring or an oxazole ring with pyromellitic anhydride. This product is stretched in the machine and transverse directions to form a biaxially stretched film. In this biaxially stretched film, crystallization at the time of stretching is suppressed from the mutually twisted structure of a heterocyclic ring such as a thiazole ring and an oxazole ring and an imide ring, and after the molecular chains are sufficiently oriented by stretching, they are crystallized. Therefore, it has high rigidity, is excellent in heat resistance, and has very low expandability due to heat. A voice coil bobbin is formed by forming the film into a cylindrical shape.

【0008】[0008]

【実施例】以下に、本発明の実施例を詳述する。 [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流
延した後、この溶液をポリマー濃度10%まで蒸発さ
せ、200℃下で縦方向、横方向に同時二軸延伸を施
し、化1で示すようなポリ−p−フェニレンベンゾビス
チアゾール(PBT)にイミド環が導入されて構成され
る、ポリイミドベンゾチアゾール(PIBT)からなる
厚み0.6mmのフィルムを生成した。
Embodiments of the present invention will be described below in detail. Example 1 In Example 1, a solution prepared by synthesizing an aromatic diamine containing a thiazole ring and pyromellitic anhydride was cast, and the solution was evaporated to a polymer concentration of 10%. The film is simultaneously biaxially stretched in the transverse direction, and is made of polyimide-benzothiazole (PIBT) having an imide ring introduced into poly-p-phenylenebenzobisthiazole (PBT) as shown in Chemical formula 1. A 6 mm film was produced.

【0009】[0009]

【化1】 このフィルムを治具を用いて円筒形状にした後、SVO
接着剤により接着することにより、実施例1のボイスコ
イルボビンが得られた。 [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流
延した後、この溶液をポリマー濃度10%まで蒸発さ
せ、200℃下で縦方向、横方向に同時二軸延伸を施
し、化2で示すような、ポリ−p−フェニレンベンゾビ
スオキサゾール(PBO)にイミド環が導入されて構成
される、ポリイミドベンゾオキサゾール(PIBO)か
らなる厚み0.6mmのフィルムを生成した。
Embedded image After making this film into a cylindrical shape using a jig, SVO
The voice coil bobbin of Example 1 was obtained by bonding with an adhesive. Example 2 In Example 2, a solution prepared by synthesizing an aromatic diamine containing an oxazole ring and pyromellitic anhydride was cast, and the solution was evaporated to a polymer concentration of 10%. A thickness of polyimide benzoxazole (PIBO), which is obtained by simultaneous biaxial stretching in the transverse direction and is formed by introducing an imide ring into poly-p-phenylene benzobisoxazole (PBO) as shown in Chemical formula 2. A 0.6 mm film was produced.

【0010】[0010]

【化2】 このフィルムを治具を用いて円筒形状にした後、SVO
接着剤により接着することにより、実施例2のボイスコ
イルボビンが得られた。
Embedded image After making this film into a cylindrical shape using a jig, SVO
The voice coil bobbin of Example 2 was obtained by bonding with an adhesive.

【0011】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 bobbin of the first and second embodiments are shown in Table 1 together with the characteristics of the conventional voice coil. Here, Conventional Example 1 is formed by forming an aluminum foil, and Conventional Example 2 is formed by forming a polyimide film.

【0012】[0012]

【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400℃と非常に高く、
更に、従来例のボイスコイルボビンと比較して、(AS
TM−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、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 Example 1 and Example 2 have a very high heat deformation temperature of 400 ° C.
Furthermore, compared to the conventional voice coil bobbin, (AS
The coefficient of linear expansion (measured according to TM-D696) is very low, so that it has a very high thermal stability. The specific gravity and the bending rigidity are almost the same as those of the conventional voice coil bobbin, and the voice coil bobbin of the present embodiment has very excellent characteristics because it is lightweight and has high rigidity.

【0013】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 in detail based on the embodiment considered to be representative, 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 components described in the above-described claims, exhibits the function of the present invention, and has the effects described below.

【0014】[0014]

【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構成され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からなる二軸延
伸フィルムを成形したものであり、この二軸延伸フィル
ムが、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延伸時の結晶化が抑制
され、延伸により分子鎖が十分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
る膨張率が非常に小さいため、本考案のボイスコイルボ
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、膨脹しない非常に高い安定
性を有するものである。
The voice coil bobbin according to the present invention has a
A biaxially stretched film made of polyimide benzothiazole, polyimide benzoxazole, or the like formed by introducing an imide ring into a heterocyclic polyimide such as p-phenylene benzobisthiazole or poly-p-phenylene benzobisoxazole. This biaxially stretched film is crystallized after the molecular chains are sufficiently oriented by stretching because the mutually twisted structure of the heterocyclic ring such as a thiazole ring and an oxazole ring and the imide ring suppresses crystallization during stretching. Therefore, the voice coil bobbin of the present invention has high rigidity, excellent heat resistance, and a very low coefficient of expansion due to heat. It has very high stability without expanding.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 スピーカに用いられるボイスコイルボビ
ンにおいて、複素環ポリイミドにイミド環を導入して構
成される二軸延伸フィルムを成形したことを特徴とする
ボイスコイルボビン。
1. A voice coil bobbin used for a speaker, wherein a biaxially stretched film formed by introducing an imide ring into a heterocyclic polyimide is formed.
【請求項2】 前記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、二軸延伸フィルム
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 voice coil bobbin according to claim 1, wherein the heterocyclic polyimide is poly-p-phenylene benzobisthiazole, and the biaxially stretched film is made of polyimide benzothiazole.
【請求項3】 前記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、二軸延伸フィル
ム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-phenylene benzobisoxazole, and the biaxially stretched film is made of polyimide benzoxazole.
JP18900593A 1993-06-30 1993-06-30 Voice coil bobbin Expired - Fee Related JP3191509B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18900593A JP3191509B2 (en) 1993-06-30 1993-06-30 Voice coil bobbin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18900593A JP3191509B2 (en) 1993-06-30 1993-06-30 Voice coil bobbin

Publications (2)

Publication Number Publication Date
JPH0723499A JPH0723499A (en) 1995-01-24
JP3191509B2 true JP3191509B2 (en) 2001-07-23

Family

ID=16233711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18900593A Expired - Fee Related JP3191509B2 (en) 1993-06-30 1993-06-30 Voice coil bobbin

Country Status (1)

Country Link
JP (1) JP3191509B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105443491A (en) * 2015-12-07 2016-03-30 柳州柳工液压件有限公司 Forklift lifting oil cylinder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102370839B1 (en) 2017-05-11 2022-03-04 엘지디스플레이 주식회사 Display apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105443491A (en) * 2015-12-07 2016-03-30 柳州柳工液压件有限公司 Forklift lifting oil cylinder

Also Published As

Publication number Publication date
JPH0723499A (en) 1995-01-24

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