JP3289040B2 - Speaker diaphragm - Google Patents

Speaker diaphragm

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Publication number
JP3289040B2
JP3289040B2 JP21354392A JP21354392A JP3289040B2 JP 3289040 B2 JP3289040 B2 JP 3289040B2 JP 21354392 A JP21354392 A JP 21354392A JP 21354392 A JP21354392 A JP 21354392A JP 3289040 B2 JP3289040 B2 JP 3289040B2
Authority
JP
Japan
Prior art keywords
diaphragm
resin
fiber
speaker
polyamide
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
JP21354392A
Other languages
Japanese (ja)
Other versions
JPH0638293A (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 JP21354392A priority Critical patent/JP3289040B2/en
Publication of JPH0638293A publication Critical patent/JPH0638293A/en
Application granted granted Critical
Publication of JP3289040B2 publication Critical patent/JP3289040B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Diaphragms For Electromechanical Transducers (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、各種の音響機器に使用
されるスピーカの振動板であって、特に柔軟な基材から
なるソフトドーム振動板に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diaphragm for a loudspeaker used in various kinds of audio equipment, and more particularly to a soft dome diaphragm made of a flexible base material.

【0002】[0002]

【従来の技術】スピーカの振動板は、外力による変形が
少なくて再生音の歪みが小さいこと、並びに再生音域が
広くて明瞭な音質を出すことが要求されて、振動板の材
質としては、弾性率(E)が大きいこと、密度(ρ)が
小さいこと、及び振動に対して適度な機械的内部損失
(tanδ)を有することが要求される。一方では、柔
軟な基材からなるソフトドーム振動板が実用化され、振
動板の材料として適度な柔軟性と高内部損失を有する基
材を使用することにより、著しい分割振動による周波数
特性のピークやディップを抑制して、比較的高域まで平
坦な周波数特性を得られることから、ツイーターとして
多用されている。
2. Description of the Related Art A diaphragm of a speaker is required to have a small deformation due to an external force and a small distortion of a reproduced sound, and to have a wide reproduced sound range and a clear sound quality. It is required that the ratio (E) is large, the density (ρ) is small, and that the material has an appropriate mechanical internal loss (tan δ) against vibration. On the other hand, a soft dome diaphragm made of a flexible base material has been put to practical use, and by using a base material having a moderate flexibility and a high internal loss as the material of the diaphragm, the peak of frequency characteristics due to remarkable splitting vibration and Since it is possible to obtain a flat frequency characteristic up to a relatively high frequency by suppressing the dip, it is often used as a tweeter.

【0003】上記用途のソフトドーム振動板は、従来
は、例えば延伸ポリエチレンテレフタレート(延伸PE
T)繊維の織布又は不織布のような繊維性基材11a に賦
形材樹脂を含浸して振動板形状に成形したり、或いは、
気密性を得るためにその上に更にゴム質材料11b をコー
ティングした積層構造として用いられる。
Conventionally, a soft dome diaphragm for the above-mentioned use has conventionally been made of, for example, stretched polyethylene terephthalate (stretched PE).
T) A fibrous base material 11a such as a woven or non-woven fabric of a fiber is impregnated with an excipient resin to be shaped into a diaphragm, or
It is used as a laminated structure further coated with a rubber material 11b to obtain airtightness.

【0004】[0004]

【発明が解決しようとする課題】この様な構造を有する
一般にソフトドーム振動板の材質としては、いずれも柔
軟且つ軽量で、振動板の分割共振や振動板自身の共振を
抑制してスピーカの周波数特性を良好にするために必要
な機械的な内部損失(tanδ)が大きいこと、賦形材
樹脂との濡れ性がよいこと等が要求されるが、延伸PE
T繊維布に例えばフェノール樹脂等の賦形材樹脂を含
浸、熱プレスした振動板はtanδが大きくなく、フェ
ノール樹脂等の賦形材樹脂との濡れ性が良好でないの
で、スピーカ振動板として常時繰り返し変形応力が加わ
る場合、耐久性に乏しいという解決すべき課題があっ
た。
In general, the soft dome diaphragm having such a structure is made of a soft and lightweight material which is flexible and lightweight, and suppresses the split resonance of the diaphragm and the resonance of the diaphragm itself to reduce the frequency of the speaker. It is required that the mechanical internal loss (tan δ) required for improving the properties is large and that the wettability with the excipient resin is good.
A diaphragm made of a T-fiber cloth impregnated with a shaping material resin such as phenolic resin and hot-pressed does not have a large tan δ and has poor wettability with the shaping material resin such as phenolic resin. When a deformation stress is applied, there is a problem to be solved that durability is poor.

【0005】そこで本発明は、上記従来例に付する欠点
を解消し、振動板の振動時の追随性や耐久性を改善し、
併せて十分なtanδを有してスピーカの周波数特性を
良好にする振動板を得ることで、優れた品質を保持する
ソフトドーム型スピーカを提供することを目的とする。
Accordingly, the present invention solves the above-mentioned disadvantages of the prior art, improves the followability and durability of the diaphragm during vibration,
It is another object of the present invention to provide a soft dome type speaker having excellent quality by obtaining a diaphragm having a sufficient tan δ and improving the frequency characteristics of the speaker.

【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
の本発明に係るスピーカ用振動板を、実施例振動板の断
面並びに細部構成を示す図1〜図2を用いて説明する
と、本願は内部がポリエステル系樹脂3で、外層部がポ
リアミド系樹脂4で被覆されたコンジュゲイト繊維2か
らなる織布又は不織布に、賦形材としてフェノール樹脂
を10〜15重量%含浸させて、振動板形状に加熱、加
圧して得たことを特徴とする。
The loudspeaker diaphragm according to the present invention for achieving the above object will be described with reference to FIGS. 1 and 2 which show the cross section and detailed structure of the diaphragm according to the embodiment. A woven or non-woven fabric made of a conjugated fiber 2 coated with a polyester resin 3 inside and a polyamide resin 4 as an outer layer is impregnated with 10-15% by weight of a phenol resin as a shaping material to form a diaphragm. And heated and pressurized.

【0007】[0007]

【作用】本願の振動板は、図2に示すように外側がポリ
アミド系樹脂からなるため、表1に示すように従来の延
伸PET繊維布と比較して、内部損失を表すtanδの
値が約3倍以上であり、又、濡れ指数も約10%大きく
なっている。従って図5に実線で示す周波数特性の様
に、点線で示した従来例の特性と比較して、中音域にお
ける大きなディップが改善されて平坦となっている。
The diaphragm of the present invention has a polyamide resin on the outside as shown in FIG. 2, and therefore, as shown in Table 1, has a value of tan .delta. It is three times or more, and the wetting index is increased by about 10%. Therefore, as shown in the frequency characteristic indicated by the solid line in FIG. 5, the large dip in the middle sound range is improved and flattened as compared with the characteristic of the conventional example indicated by the dotted line.

【0008】また、コンジュゲイト繊維の内部のポリエ
ステル樹脂は伸縮率が低く、寸法安定性が優れている。
[0008] The polyester resin inside the conjugate fiber has a low expansion and contraction rate and is excellent in dimensional stability.

【0009】[0009]

【表1】 [Table 1]

【0010】[0010]

【実施例】本願発明で用いられるコンジュゲイト繊維2
は、ポリエステル系樹脂3としてPET樹脂を、ポリア
ミド系樹脂4としてナイロン66を使用し、夫々の溶融
ポリマーが融合され、同時に吐出紡糸される。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Conjugate fiber 2 used in the present invention
Uses PET resin as the polyester-based resin 3 and nylon 66 as the polyamide-based resin 4, and the respective molten polymers are fused and simultaneously spun.

【0011】次いで、ポリエステルの2次転移温度60
〜80℃より低く、且つポリアミドの2次転移温度−3
0〜45℃より高い45〜60℃の間の温度で加熱延伸
を行ったが、この延伸工程では、ポリエステル3の部分
は高分子の配列は凍結されていて変形が困難であり、ポ
リアミド4の部分は高分子の凍結がとけて図2に示すよ
うな偏心芯サヤ型2成分繊維ができる。この様なコンジ
ュゲイト繊維のポリアミド並びにポリエステルの中の分
子群は、延伸方向に配向し、伸びた分子鎖を持つフィブ
リル状の結晶が生じている。従って、繊維は強度が優れ
たものとなっている。
Next, the polyester has a second transition temperature of 60.
Below 80 ° C. and the secondary transition temperature of polyamide-3
Heat stretching was carried out at a temperature between 45 and 60 ° C. higher than 0 to 45 ° C. In this stretching step, the arrangement of the polymer was frozen in the portion of the polyester 3 and the deformation of the polyamide 3 was difficult. In the portion, the polymer is frozen to form an eccentric sheath-type bicomponent fiber as shown in FIG. The molecular groups in the polyamide and polyester of such a conjugate fiber are oriented in the stretching direction, and fibril-like crystals having elongated molecular chains are generated. Therefore, the fiber has excellent strength.

【0012】この様な偏心芯サヤ型2成分繊維からなる
織布基材で、その厚みが50ミクロンの織布を基材とし
て用い、賦形材樹脂としてフェノール樹脂10〜15重
量%を含浸して、成形温度260〜290℃、圧力1K
g/cm2 の下で10〜12秒間加熱プレスしてスピー
カ用振動板1を得た。
A woven fabric base made of such an eccentric core-sheath type bicomponent fiber having a thickness of 50 microns as a base material and impregnated with 10 to 15% by weight of a phenol resin as a shaping material resin. Molding temperature 260-290 ° C, pressure 1K
It was heated and pressed under g / cm 2 for 10 to 12 seconds to obtain speaker diaphragm 1.

【0013】比較のための従来例として、織布基材とし
て延伸PET繊維織布を使用し、実施例と同一成形工程
で振動板を得、上記実施例振動板と共にソフトドームス
ピーカを組立て、周波数特性を測定して図3に示した。
同図特性表で実線は実施例、点線は従来例である。
As a conventional example for comparison, a stretched PET fiber woven fabric was used as a woven fabric substrate, a diaphragm was obtained by the same molding process as in the embodiment, and a soft dome speaker was assembled together with the diaphragm in the above-described embodiment. The characteristics were measured and are shown in FIG.
In the characteristic table of the same figure, a solid line is an example and a dotted line is a conventional example.

【0014】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
による振動板の実施態様は、コンジュゲイト繊維を形成
する2種の樹脂成分などに於て、上記実施例の構造に限
定されるものではなく、例えばポリエステル系樹脂、ポ
リアミド系樹脂の種類等、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 speaker diaphragm according to the present invention has been described in detail based on the examples which are considered to be typical, the embodiment of the diaphragm according to the present invention comprises two kinds of resin components forming a conjugate fiber. However, the present invention is not limited to the structure of the above-described embodiment, but includes, for example, the types of polyester-based resin and polyamide-based resin as described in the claims, and functions according to the present invention. And can be implemented with appropriate modifications as long as the following effects are obtained.

【0015】[0015]

【効果】本願発明に係るスピーカ用振動板は、以下に述
べる効果を有する。
The speaker diaphragm according to the present invention has the following effects.

【0016】まず表1から、明らかなように、実施例の
コンジュゲイト繊維は図2のように内部が強度に優れた
ポリエステル樹脂からなり、外側が耐熱性に優れたポリ
アミド繊維で取り巻いているので、弾性率が高く、又内
部損失は約3倍となっているので、図3に示すように高
域共振周波数が高くなって再生帯域が拡張されるととも
に、当該高域共振周波数に於ける著しいピークの発生を
防ぎ、周波数特性を平坦にして、優れた品質の再生音を
得る。又、個体の塗れ指数は約10%向上しているの
で、成形された振動板基材が機械的に安定であり、且つ
樹脂との接着性が優れているので長期間に渡って優れた
特性を保持し、スピーカとしての長寿命が得られる。
First, as is clear from Table 1, the conjugate fiber of the embodiment is made of a polyester resin having excellent strength inside and a polyamide fiber having excellent heat resistance on the outside as shown in FIG. , The elastic modulus is high, and the internal loss is about three times higher. As shown in FIG. 3, the high-band resonance frequency is increased, the reproduction band is extended, and the remarkable frequency at the high-band resonance frequency is increased. The generation of peaks is prevented, the frequency characteristics are flattened, and a reproduced sound of excellent quality is obtained. In addition, since the wettability index of the solid is improved by about 10%, the formed diaphragm base material is mechanically stable, and has excellent adhesiveness with resin, so that it has excellent properties over a long period of time. And a long life as a speaker is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本願実施例スピーカ用振動板の要部断面図。FIG. 1 is a sectional view of an essential part of a speaker diaphragm according to an embodiment of the present invention.

【図2】同実施例の要部構成を説明する拡大斜視図。FIG. 2 is an enlarged perspective view illustrating a configuration of a main part of the embodiment.

【図3】実施例振動板と従来例振動板とを比較する周波
数特性図。
FIG. 3 is a frequency characteristic diagram comparing an example diaphragm and a conventional example diaphragm.

【符号の説明】[Explanation of symbols]

1 スピーカ用振動板 2 コンジュゲイト繊維 3 ポリエステル系樹脂 4 ポリアミド系樹脂 DESCRIPTION OF SYMBOLS 1 Speaker diaphragm 2 Conjugate fiber 3 Polyester resin 4 Polyamide resin

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 内部がポリエステル系樹脂で、外層部が
ポリアミド系樹脂で被覆された偏心芯サヤ型2成分繊維
からなる織布又は不織布に、賦形材としてフェノール樹
脂が含侵されている、スピーカ用振動板。
An eccentric sheath-type bicomponent fiber in which the inside is made of a polyester resin and the outer layer is coated with a polyamide resin.
Phenolic tree as an excipient
A speaker diaphragm impregnated with fat .
【請求項2】 内部にポリエステル系樹脂と、外層部に
ポリアミド系樹脂とを吐出紡糸する工程と、 該吐出紡糸された繊維を加熱延伸し、偏心芯サヤ型2成
分繊維を形成する工程と、 該偏心芯サヤ型2成分繊維から基材を形成する工程と、 該基材にフェノール樹脂を含浸し、加熱および加圧する
工程とを含む、スピーカ用振動板の製造方法。
2. A process of discharging and spinning a polyester-based resin inside and a polyamide-based resin in an outer layer portion, and heating and drawing the discharged and spun fiber to form an eccentric core sheath type bicomponent fiber. And a step of forming a base material from the eccentric core-sheath type bicomponent fibers; and a step of impregnating the base material with a phenol resin, heating and pressurizing.
【請求項3】 前記偏心芯サヤ型2成分繊維を形成する
工程において、前記吐出紡糸された繊維を45〜60℃
で加熱延伸する、請求項2に記載のスピーカ用振動板の
製造方法。
3. In the step of forming the eccentric core sheath type bicomponent fiber, the discharged spun fiber is kept at 45 to 60 ° C.
The method for producing a diaphragm for a speaker according to claim 2, wherein the film is heated and stretched.
JP21354392A 1992-07-16 1992-07-16 Speaker diaphragm Expired - Fee Related JP3289040B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21354392A JP3289040B2 (en) 1992-07-16 1992-07-16 Speaker diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21354392A JP3289040B2 (en) 1992-07-16 1992-07-16 Speaker diaphragm

Publications (2)

Publication Number Publication Date
JPH0638293A JPH0638293A (en) 1994-02-10
JP3289040B2 true JP3289040B2 (en) 2002-06-04

Family

ID=16640939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21354392A Expired - Fee Related JP3289040B2 (en) 1992-07-16 1992-07-16 Speaker diaphragm

Country Status (1)

Country Link
JP (1) JP3289040B2 (en)

Also Published As

Publication number Publication date
JPH0638293A (en) 1994-02-10

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