JP3030904B2 - Speaker diaphragm - Google Patents

Speaker diaphragm

Info

Publication number
JP3030904B2
JP3030904B2 JP3094025A JP9402591A JP3030904B2 JP 3030904 B2 JP3030904 B2 JP 3030904B2 JP 3094025 A JP3094025 A JP 3094025A JP 9402591 A JP9402591 A JP 9402591A JP 3030904 B2 JP3030904 B2 JP 3030904B2
Authority
JP
Japan
Prior art keywords
diaphragm
urethane foam
edge
speaker diaphragm
present
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
JP3094025A
Other languages
Japanese (ja)
Other versions
JPH04324798A (en
Inventor
均 佐藤
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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 Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP3094025A priority Critical patent/JP3030904B2/en
Publication of JPH04324798A publication Critical patent/JPH04324798A/en
Application granted granted Critical
Publication of JP3030904B2 publication Critical patent/JP3030904B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • 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】本発明は各種音響機器に使用され
るスピーカ用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 diaphragm for a speaker used in various audio equipment.

【0002】[0002]

【従来の技術】従来のスピーカ用振動板のエッジ基材に
は、振動板本体と一体化された天然パルプ100%のフ
ィックスドエッジ、またコーン部と貼り合わせるフリー
エッジとしては天然パルプシート,SBR,NBR等の
樹脂を含浸した織布、ウレタン発泡体などがあった。
2. Description of the Related Art Conventionally, a fixed edge of 100% natural pulp integrated with a diaphragm main body is used as an edge base material of a conventional speaker diaphragm, and a natural pulp sheet or SBR is used as a free edge bonded to a cone portion. Woven fabric, urethane foam, etc. impregnated with resins such as NBR and NBR.

【0003】[0003]

【発明が解決しようとする課題】フィックスドエッジは
振動板本体と一体化されているため振幅がとれず、最低
共振周波数(fo)を低くすることができないため重低
音再生ができない。フリーエッジの中で天然パルプシー
トを用いたものは材料の強度が弱いため、低耐入力であ
る。SBR,NBR等の樹脂を含浸した織布は、耐湿性
・耐熱性に弱く、また入力に対する振幅のリニアリティ
が悪いために、高耐入力時の最低共振周波数foの低下
率が大きいなどの欠点があった。
Since the fixed edge is integrated with the diaphragm main body, the amplitude cannot be obtained, and the lowest resonance frequency (f o ) cannot be lowered, so that heavy bass reproduction cannot be performed. The free edge using a natural pulp sheet has a low power input because the strength of the material is weak. SBR, drawbacks such woven fabric impregnated with resin such as NBR are weak in humidity resistance and heat resistance, also due to poor amplitude linearity for the input, a large rate of decrease in the lowest resonance frequency f o at high input resistance was there.

【0004】また、ウレタン発泡体は湿度,熱,耐候性
に弱いなどの欠点があった。さらに発泡ウレタンフォー
ムの表面にSBRやアクリル系の被膜を形成したものも
あった。SBR被膜では温度や湿度の影響を受けて物性
の劣化を起こしやすい。アクリル被膜では発泡ウレタン
フォームとの物性の違いにより熱成形がしにくいといっ
た欠点があった。
Further, urethane foams have disadvantages such as low humidity, heat and weather resistance. In some cases, SBR or acrylic coatings were formed on the surface of the urethane foam. SBR coatings are susceptible to deterioration in physical properties under the influence of temperature and humidity. The acrylic coating has a drawback that thermoforming is difficult due to the difference in physical properties from the urethane foam.

【0005】本発明は以上のような従来の欠点を除去
し、耐熱,耐湿,耐候などの信頼性に優れ、高耐入力時
にも変形がなく最低共振周波数foの低下率の少ないエ
ッジ部をもったスピーカ用振動板を提供しようとするも
のである。
[0005] The present invention removes the deficiencies of the prior art as described above, heat, moisture, excellent in reliability such as weather, a little edge portion of reduction rate of a high withstand lowest resonance without deformation even when the input frequency f o It is an object of the present invention to provide a speaker diaphragm having the same.

【0006】[0006]

【課題を解決するための手段】上記の課題を解決するた
めに本発明は、エーテル系発泡ウレタンフォームの表面
または両面に、エーテル系ポリオールを使用した湿気硬
化型ウレタンフィルム層を形成し、ロジン系エマルジョ
ンを含浸し加熱成型加工してエッジを構成し、振動板本
体の周縁部に結合してスピーカ用振動板を構成するもの
である。
SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a moisture-curable urethane film layer using an ether polyol on the surface or both surfaces of an ether urethane foam, An edge is formed by impregnating the emulsion and heat-molding to form an edge, and is connected to a peripheral portion of the diaphragm main body to form a speaker diaphragm.

【0007】[0007]

【作用】以上のようにエステル系発泡ウレタンフォーム
よりも湿熱性に優れたエーテル系発泡ウレタンフォーム
の表面または両面に、湿気硬化型のエーテル系ウレタン
被膜層を設けることにより、紫外線による物性の劣化を
防ぎ信頼性向上を可能にすることができる。さらにエマ
ルジョンを含浸することにより防水性も付与される。
[Function] As described above, by providing a moisture-curable ether-based urethane coating layer on the surface or both surfaces of an ether-based urethane foam having better wet heat property than the ester-based urethane foam, deterioration of physical properties due to ultraviolet rays can be prevented. It is possible to prevent and improve reliability. Furthermore, waterproofness is also given by impregnating the emulsion.

【0008】[0008]

【実施例】以下、本発明の一実施例に関して図面を用い
て説明する。
An embodiment of the present invention will be described below with reference to the drawings.

【0009】図1は本発明のスピーカ用振動板の断面図
である。1はエッジ部、2は振動板本体であり、この振
動板のエッジ部分1にはエーテル系発泡ウレタンフォー
ムを基材として湿気硬化型のウレタン被膜層を設けた構
成となっている。
FIG. 1 is a sectional view of a speaker diaphragm according to the present invention. Reference numeral 1 denotes an edge portion, and reference numeral 2 denotes a diaphragm main body. The edge portion 1 of the diaphragm has a configuration in which a moisture-curable urethane coating layer is provided on an ether-based urethane foam base material.

【0010】表面被膜形成のための条件は次の通りであ
る。ポリオール部を計量し、イソシアネートを徐々に添
加し、温度をゆっくり上げ85℃にて2.5時間反応さ
せたのち直ちに温度を常温に下げ他の配合薬品と混合攪
拌する。これを剥離紙上に一定量シーティングし、ウレ
タンフォームを乗せて一体化する。これを60〜80℃
に設定したオーブンにて2〜4分反応固化させた後80
〜110℃にて4〜8分アフターキュアーして約50μ
の厚さの被膜を形成してエッジ部分1を構成する。これ
にロジン系のエマルジョンを全体に含浸し乾燥させる。
以上のウレタンフォームを金型温度190℃、成形時間
約40secの条件で図1に示すエッジ部1に成形し、内周
部に振動板本体2を接着した。
The conditions for forming the surface coating are as follows. The polyol part is weighed, isocyanate is gradually added, the temperature is slowly raised, and the reaction is carried out at 85 ° C. for 2.5 hours. This is sheeted on a release paper by a predetermined amount, and then urethane foam is placed thereon to be integrated. 60 ~ 80 ℃
After solidifying for 2 to 4 minutes in an oven set to 80,
Aftercure at ~ 110 ° C for 4-8 minutes to about 50μ
Is formed to form the edge portion 1. The whole is impregnated with a rosin-based emulsion and dried.
The above urethane foam was molded into the edge portion 1 shown in FIG. 1 under the conditions of a mold temperature of 190 ° C. and a molding time of about 40 sec, and the diaphragm main body 2 was adhered to the inner peripheral portion.

【0011】本発明のスピーカ用振動板を用いた耐候性
試験結果を図2および図3に示す。本発明のエッジ部1
を用いた方が引張強度、伸び保持率共に発泡ウレタンの
エッジを用いた従来品よりも良好となっている。また防
水性も非常に良好となる。
FIGS. 2 and 3 show the results of a weather resistance test using the speaker diaphragm of the present invention. Edge part 1 of the present invention
Is better in both tensile strength and elongation retention than conventional products using urethane foam edges. Also, the waterproofness becomes very good.

【0012】[0012]

【発明の効果】以上のように本発明のスピーカ用振動板
は構成されるため、特にエッジの基材と被膜が同じウレ
タン系であるために成形性が良好で、耐候性および防水
性に優れ、大入力が可能となるスピーカを提供すること
のできる工業的価値の大なるものである。
As described above, since the speaker diaphragm of the present invention is constituted, the moldability is excellent and the weather resistance and the waterproofness are excellent because the base material and the coating on the edge are made of the same urethane. Thus, a speaker capable of providing a large input can be provided with great industrial value.

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

【図1】本発明の一実施例におけるスピーカ用振動板の
断面図
FIG. 1 is a cross-sectional view of a speaker diaphragm according to an embodiment of the present invention.

【図2】本発明のスピーカ用振動板を用いたスピーカの
耐候性試験による引張強度保持率を示す特性図
FIG. 2 is a characteristic diagram showing tensile strength retention by a weather resistance test of a speaker using the speaker diaphragm of the present invention.

【図3】同伸び保持率を示す特性図FIG. 3 is a characteristic diagram showing the elongation retention.

【符号の説明】[Explanation of symbols]

1 エッジ部分 2 振動板本体 1 edge part 2 diaphragm main body

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】エーテル系ウレタンフォームの表面または
両面に湿気硬化型エーテル系ウレタンフィルム層を形成
し、ロジン系エマルジョンを含浸し加熱成型加工したエ
ッジを振動板本体の周縁部に結合してなるスピーカ用振
動板。
1. A loudspeaker comprising a moisture-curable ether-based urethane film layer formed on the surface or both surfaces of an ether-based urethane foam, impregnated with a rosin-based emulsion, and heat-molded edges connected to the peripheral edge of the diaphragm main body. Diaphragm.
JP3094025A 1991-04-24 1991-04-24 Speaker diaphragm Expired - Fee Related JP3030904B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3094025A JP3030904B2 (en) 1991-04-24 1991-04-24 Speaker diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3094025A JP3030904B2 (en) 1991-04-24 1991-04-24 Speaker diaphragm

Publications (2)

Publication Number Publication Date
JPH04324798A JPH04324798A (en) 1992-11-13
JP3030904B2 true JP3030904B2 (en) 2000-04-10

Family

ID=14099025

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3094025A Expired - Fee Related JP3030904B2 (en) 1991-04-24 1991-04-24 Speaker diaphragm

Country Status (1)

Country Link
JP (1) JP3030904B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060111557A (en) 2003-12-26 2006-10-27 오지 가부시키가이샤 Waterproof vibrating plate for speaker

Also Published As

Publication number Publication date
JPH04324798A (en) 1992-11-13

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