JP3060733B2 - Speaker diaphragm - Google Patents
Speaker diaphragmInfo
- Publication number
- JP3060733B2 JP3060733B2 JP21375792A JP21375792A JP3060733B2 JP 3060733 B2 JP3060733 B2 JP 3060733B2 JP 21375792 A JP21375792 A JP 21375792A JP 21375792 A JP21375792 A JP 21375792A JP 3060733 B2 JP3060733 B2 JP 3060733B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- present
- speaker
- speaker diaphragm
- heat resistance
- 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
Links
Description
【産業上の利用分野】本発明は、スピーカに使用する截
頭円錐形またはドーム形の発泡樹脂製振動板に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frustoconical or dome-shaped foamed resin diaphragm used for a speaker.
【従来の技術】従来この種のスピーカ用振動板は、加熱
加圧成形が容易で、且つ軽量であって、振動板として、
適度な内部損失と、剛性を兼ね備えた物として特公昭６
３−１３６３３号公報に記載されたものがあり、それは
スチレンと無水マレイン酸の共重合樹脂の発泡体よりな
るとしたものである。2. Description of the Related Art Conventionally, a speaker diaphragm of this type is easy to heat and press-mold and is lightweight.
Tokiko Sho 6
Japanese Patent Application Laid-Open No. 3-13363 discloses a method comprising a foam of a copolymer resin of styrene and maleic anhydride.
【発明が解決しようとする課題】したがって、従来のこ
の種スピーカ用振動板にあっては、約９８℃から急激に
熱収縮率が大きくなり性質があり、約１１０℃までが耐
熱限界であった。最近になって、自動車用、屋外用、大
入力用など、さらなる耐熱性が要求されるに至り、実用
面で耐熱性について不十分であるという問題があった。
そこで、本発明は、このような従来の発泡樹脂製振動板
が有していた課題を解決するために、熱変形温度の高い
発泡樹脂製スピーカ用振動板を提供しようとするもので
ある。Therefore, in this kind of conventional diaphragm for a speaker, the heat shrinkage rate suddenly increases from about 98.degree. C. and has a property, and the heat resistance limit is about 110.degree. . Recently, further heat resistance has been required for automobiles, outdoor use, high input power, and the like, and there has been a problem that heat resistance is insufficient in practical use.
In view of the above, the present invention is to provide a foamed resin speaker diaphragm having a high heat deformation temperature in order to solve the problems of the conventional foamed resin diaphragm.
【課題を解決するための手段】該目的を達成するための
本発明の構成を説明すると、本発明は、合成樹脂を発泡
して成形してなるスピーカ振動板において、 ポリフェニ
レンオキサイドとポリスチレンの混合物を押し出し成形
してなる発泡フィルム又は発泡シートを振動板状に成形
してなる構成としたスピーカ用振動板である。Means for Solving the Problems To explain the constitution of the present invention for achieving the object, the present invention relates to a loudspeaker diaphragm formed by foaming and molding a synthetic resin, wherein a mixture of polyphenylene oxide and polystyrene is used. This is a speaker diaphragm having a configuration in which an extruded foam film or foam sheet is formed into a diaphragm shape.
【作用】従って、本発明のスピーカ用振動板は、耐熱性
の優れた新規なポリフェニレンオキサイドとポリスチレ
ンの混合物を押し出し成形した発泡樹脂のフィルム又は
シートを用いて、成形した振動板とすることができる。
その結果、約１２５℃までの耐熱性を有せしめることが
できて、従来の発泡樹脂製振動板では実用化できなかっ
た高温環境の中においても軽量で、適度な内部損失と剛
性を保有する発泡樹脂製振動板として使用できるように
したものである。Accordingly, the diaphragm for a speaker of the present invention can be formed by using a foamed resin film or sheet formed by extruding a novel mixture of polyphenylene oxide and polystyrene having excellent heat resistance. .
As a result, it is possible to provide heat resistance up to about 125 ° C., and it is lightweight even in a high-temperature environment that could not be put into practical use with a conventional foamed resin diaphragm, and has a moderate internal loss and rigidity. It can be used as a resin diaphragm.
【実施例】以下本発明の実施例について説明する。本発
明は、ポリフェニレンオキサイドとポリスチレンの混合
物に、発泡剤を添加混合して押し出し成形した、 嵩比重
０．１、厚さ１．５ｍｍの発泡樹脂シートを、約１２５
℃〜１３５℃に遠赤外線ヒータで加熱して、約３０〜５
０℃の円錐形状又はドーム形状の金型で約５秒間型締め
を行って成形したスピーカ用振動板である。発泡状態の
シート又はフィルムを振動板形状とする手段は、 上記金
型以外に周知の圧空成形法を適用してもよい。以上本発
明の代表的と思われる実施例について説明したが、本発
明は必ずしもこれらの実施例構造のみに限定されるもの
ではなく、本発明にいう前記の構成要件を備え、かつ、
本発明にいう目的を達成し、以下にいう効果を有する範
囲内において適宜改変して実施することができるもので
ある。Embodiments of the present invention will be described below. According to the present invention, a foamed resin sheet having a bulk specific gravity of 0.1 and a thickness of 1.5 mm formed by extruding a mixture of polyphenylene oxide and polystyrene with a foaming agent added thereto is added to a mixture of about 125
℃ to 135 ℃ with a far infrared heater, about 30 to 5
This is a speaker diaphragm formed by clamping with a conical or dome-shaped mold at 0 ° C. for about 5 seconds. As a means for forming a foamed sheet or film into a diaphragm shape, a well-known pressure forming method other than the above-described mold may be applied. Although the embodiments that are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, and includes the above-described constituent elements according to the present invention, and
The present invention achieves the object of the present invention and can be appropriately modified and implemented within the range having the following effects.
【発明の効果】以上の説明から既に明らかなように、本
発明は、ポリフェニレンオキサイドとポリスチレンの混
合物を押し出し成形してなる発泡フィルム又は発泡シー
トを振動板状に成形してなる構成としたものであるか
ら、耐熱性の面で以下に図１を参照して説明するごとく
従来のものには期待することが出来ない顕著な効果を有
するに至ったのである。実験例の結果を示す図１によれ
ば、同図は、温度による寸法変化をみるために、各温度
において９６時間恆温槽内に放置して、取り出して後、
約２４時間経過後振動板の収縮率を測定した結果であ
る。図１において、実線は本願実施例振動板の、又、点
線は従来例として特公昭６３−１３６３３号公報記載の
振動板の、それぞれ温度に対する収縮率のグラフであ
る。この結果によると、従来例では９８℃から急激に熱
収縮率が大きくなり、約１１０℃までが耐熱限界であっ
たが、本願実施例では、少なくとも１２０℃までは熱収
縮率が小さく、耐熱限界温度も１３０℃を越えているこ
とから、本願の構成のスピーカ用振動板の耐熱性が従来
例より優れていることが明らかであり、自動車用、屋外
用等高温環境において従来に見られなかった信頼性の高
いスピーカを得ることができる。As is apparent from the above description, the present invention has a structure in which a foam film or a foam sheet formed by extruding a mixture of polyphenylene oxide and polystyrene is formed into a diaphragm. Therefore, as described below with reference to FIG. 1 in terms of heat resistance, the present invention has a remarkable effect that cannot be expected from the conventional one. According to FIG. 1 showing the results of the experimental example, FIG. 1 shows that the sample was left in a heating bath for 96 hours at each temperature to take out the dimensional change with temperature, and then taken out.
It is the result of measuring the contraction rate of the diaphragm after about 24 hours. In FIG. 1, the solid line is a graph of the diaphragm of the embodiment of the present application, and the dotted line is a graph of the contraction rate with respect to temperature of the diaphragm described in Japanese Patent Publication No. 63-13633 as a conventional example. According to this result, in the conventional example, the heat shrinkage rate suddenly increased from 98 ° C., and the heat shrinkage rate was about 110 ° C., but in the present example, the heat shrinkage rate was small up to at least 120 ° C. Since the temperature also exceeds 130 ° C., it is clear that the heat resistance of the speaker diaphragm having the configuration of the present invention is superior to that of the conventional example, and has not been seen in a high temperature environment such as for an automobile or outdoors. A highly reliable speaker can be obtained.
【図１】本願発明（実線）と従来例（点線）のスピーカ
用振動板の熱収縮率のグラフ。FIG. 1 is a graph showing the thermal contraction rates of the speaker diaphragms of the present invention (solid line) and a conventional example (dotted line).
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ｂ２９Ｋ 25:00 Ｂ２９Ｌ 31:38 (56)参考文献 特開 昭54−80733（ＪＰ，Ａ) 特開 昭58−43698（ＪＰ，Ａ) 特開 平４−23699（ＪＰ，Ａ) 特開 昭55−136793（ＪＰ，Ａ) 実開 昭56−31795（ＪＰ，Ｕ) 実開 昭54−28432（ＪＰ，Ｕ) 実開 平３−103693（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04R 7/02 B29C 69/02 B29D 31/00 C08L 25/00 C08L 71/12 B29K 25:00 B29L 31:38 ──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 7 Identification symbol FI // B29K 25:00 B29L 31:38 (56) References JP-A-54-80733 (JP, A) JP-A-58-43698 (JP, A) JP-A-4-23699 (JP, A) JP-A-55-136793 (JP, A) JP-A-56-31795 (JP, U) JP-A-54-28432 (JP, U) Kaihei 3-103693 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H04R 7/02 B29C 69/02 B29D 31/00 C08L 25/00 C08L 71/12 B29K 25:00 B29L 31:38
Claims (1)
動板において、 ポリフェニレンオキサイドとポリスチレ
ンの混合物を押し出し成形してなる発泡フィルム又は発
泡シートを振動板状に成形してなるスピーカ用振動板。1. A speaker diaphragm formed by foaming a resin and molding a foamed film or foam sheet formed by extruding a mixture of polyphenylene oxide and polystyrene into a diaphragm shape. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21375792A JP3060733B2 (en) | 1992-07-16 | 1992-07-16 | Speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21375792A JP3060733B2 (en) | 1992-07-16 | 1992-07-16 | Speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0638294A JPH0638294A (en) | 1994-02-10 |
| JP3060733B2 true JP3060733B2 (en) | 2000-07-10 |
Family
ID=16644529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21375792A Expired - Fee Related JP3060733B2 (en) | 1992-07-16 | 1992-07-16 | Speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3060733B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4534094B2 (en) * | 2004-07-12 | 2010-09-01 | オンキヨー株式会社 | Speaker diaphragm and manufacturing method thereof |
| JP2006319464A (en) * | 2005-05-10 | 2006-11-24 | Pioneer Electronic Corp | Manufacturing method for diaphragm used for speaker device |
-
1992
- 1992-07-16 JP JP21375792A patent/JP3060733B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0638294A (en) | 1994-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 12 Free format text: PAYMENT UNTIL: 20120428 |
|
| LAPS | Cancellation because of no payment of annual fees |