JPS63287298A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPS63287298A JPS63287298A JP12293987A JP12293987A JPS63287298A JP S63287298 A JPS63287298 A JP S63287298A JP 12293987 A JP12293987 A JP 12293987A JP 12293987 A JP12293987 A JP 12293987A JP S63287298 A JPS63287298 A JP S63287298A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- speaker
- fibers
- mica
- chitosan
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000010445 mica Substances 0.000 claims abstract description 16
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 229920001661 Chitosan Polymers 0.000 claims abstract description 9
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004952 Polyamide Substances 0.000 claims abstract description 9
- 229920002647 polyamide Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 229920002101 Chitin Polymers 0.000 claims abstract description 4
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract 3
- 239000002655 kraft paper Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 4
- 229920005615 natural polymer Polymers 0.000 claims description 3
- 235000019422 polyvinyl alcohol Nutrition 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000006196 deacetylation Effects 0.000 abstract 1
- 238000003381 deacetylation reaction Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 125000003700 epoxy group Chemical group 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000850 deacetylating effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は音響出力機器等に用いられるスピーカ用振動板
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a speaker diaphragm used in acoustic output equipment and the like.
従来の技術
近年、カセットテープレコーダ、マイクロカセットテー
プレコーダ、ハイファイステレオ業界においては音響出
力機器としてのスピーカの音響特性においても従来より
もさらに出力音圧、歪率。Conventional technology In recent years, in the cassette tape recorder, micro cassette tape recorder, and hi-fi stereo industries, the acoustic characteristics of speakers used as audio output equipment have improved in terms of output sound pressure and distortion rate.
平坦性に優れたスピーカが望まれておシ、音響特性と左
右するスピーカ用振動板はますます重要視されている。As speakers with excellent flatness are desired, speaker diaphragms, which have an influence on acoustic characteristics, are becoming increasingly important.
以下上述した従来のスピーカについてその動作を説明す
る。スピーカは振動板、ボイスコイルなどの振動系とマ
グネット、ポール、プレート、ヨークよりなる磁気回路
系よりなる。一様な磁場中の中にあるボイスコイルに音
声電流が流れるとボイスコイルに上下方向の駆動力が発
生し、電流に応じて振動する。この振動を正しく振動板
の振動に伝え音波として放射される（例えば、早坂寿雄
：音響工学入門９日刊工業新聞社）。The operation of the conventional speaker described above will be explained below. A speaker consists of a vibration system such as a diaphragm and voice coil, and a magnetic circuit system consisting of a magnet, poles, plates, and yokes. When an audio current flows through a voice coil in a uniform magnetic field, a vertical driving force is generated in the voice coil, causing it to vibrate in response to the current. This vibration is properly transmitted to the vibration of the diaphragm and radiated as a sound wave (for example, Toshio Hayasaka: Introduction to Acoustic Engineering 9, Nikkan Kogyo Shimbun).
発明が解決しようとする問題点
しかしながらスピーカの振動板は使用する周波数帯域に
わたってピストン運動することが理想とされるが振動中
に振動板が変形したり分割振動が生ずると音圧−周波数
特性、歪率９位相特性等が劣化し、高忠実再生の妨げと
なる。また、従来の紙コーン振動板やプラスチック振動
板は振動板材料のもつＥ／ρ（Ｅ：弾性率、ρ：密度）
が小さいため、高域共振周波数が低く、スピーカが高域
まで再生できないという欠点がある。Problems to be Solved by the Invention However, it is ideal for the diaphragm of a speaker to move as a piston over the frequency band used, but if the diaphragm deforms during vibration or split vibration occurs, the sound pressure-frequency characteristics and distortion will deteriorate. The rate 9 phase characteristics and the like deteriorate, which impedes high-fidelity reproduction. In addition, conventional paper cone diaphragms and plastic diaphragms have E/ρ (E: elastic modulus, ρ: density) of the diaphragm material.
Since this is small, the high-frequency resonant frequency is low, and the speaker has the disadvantage that it cannot reproduce high frequencies.
本発明は上記問題点に鑑み、振動中に振動板が変形した
り分割振動を生ぜず、高域再生周波数が高いスピーカ用
振動板を提供するものである。In view of the above-mentioned problems, the present invention provides a diaphragm for a speaker that does not deform or cause split vibration during vibration and has a high high-frequency reproduction frequency.
問題点を解決するための手段
この目的を達成するために本発明のスピーカ用振動板は
クラフトパルプと天然高分子であるキチン質が脱アセチ
ル化されたキトンサンと、ポリアミド・エピクロルヒド
リン樹脂とリン片状マイカとポリビニルアルコール繊維
とが混合抄造され、加熱されて反応発泡させた構造物か
らなっている。Means for Solving the Problems In order to achieve this object, the speaker diaphragm of the present invention is made of kraft pulp, chitonsan, which is a natural polymer in which chitin has been deacetylated, polyamide/epichlorohydrin resin, and scaly flakes. It consists of a structure in which mica and polyvinyl alcohol fibers are mixed and formed into a paper, which is then heated to react and foam.
作 用
本発明は、上述した構成により、弾性率の大きい天然高
分子素材であるキトサンとクラフトパルプおよび前記２
種類の素材をエポキシ基により架橋反応させるためのポ
リアミド・エピクロルヒドリン樹脂とが混抄され加熱反
応されておシ、従来の紙パルプと異なり繊維同士のから
みおいだけでなく化学的に繊維同士を部分的に結合して
いるため強度が大きぐなシ、さらに強化材としてリン片
状マイカが混合されているため、非常に解性率が太き込
とともに、繊維同士やマイカの眉間のすべりにより内部
損失が大きい理想の物性を有した振動板が実現できるも
のである。さらに本発明の構成では抄造され、加熱され
たことによりポリビニルアルコール繊維がバインダーと
なり水分の蒸気圧により発泡させた多孔体となっている
ため、同じ重量でも厚みを厚くして振動板とすることが
でき、曲：げ剛１性が大きくなり、振動中に振動板が変
形したり分割共振が生じないものである。Function The present invention has the above-described structure, and uses chitosan and kraft pulp, which are natural polymeric materials with a large elastic modulus, and the above-mentioned two.
Polyamide and epichlorohydrin resin are mixed and heat-reacted to cross-link different types of materials with epoxy groups. Because the fibers are bonded together, they have great strength, and because flaky mica is mixed as a reinforcing material, the decomposition rate is extremely high, and internal loss due to sliding between the fibers and between the eyebrows of the mica. A diaphragm with highly ideal physical properties can be realized. Furthermore, in the configuration of the present invention, the polyvinyl alcohol fibers become a binder when paper is made and heated, and the porous body is foamed by the vapor pressure of water, so it is possible to make a diaphragm with a thicker thickness even with the same weight. The bending stiffness is increased, and the diaphragm does not deform or split resonance occurs during vibration.
実施例
以下、本発明の一実施例のスピーカ用振動板について説
明する。EXAMPLE A speaker diaphragm according to an example of the present invention will be described below.
本発明の一実施例におけるスピーカはクラフトパルプと
天然高分子であるキチン質を脱アセチル化したキトサン
とエポキシ基を有するポリアミド・エピクロルヒドリン
樹脂とリン片状マイカとポリビニルアルコール繊維とを
混合抄造した後、加熱して反応発泡させた構造体を振動
板としている。この振動板はボイスコイルボビンに固着
さし、ボイスコイルポビンの先端に設けられたボイスコ
イル嘉磁気回路の磁気ギャップに挿入されている。The speaker in one embodiment of the present invention is made by mixing and paper-making kraft pulp, chitosan obtained by deacetylating chitin, which is a natural polymer, polyamide/epichlorohydrin resin having an epoxy group, flaky mica, and polyvinyl alcohol fiber. The diaphragm is a structure that is heated and foamed by reaction. This diaphragm is fixed to the voice coil bobbin and inserted into the magnetic gap of the voice coil magnetic circuit provided at the tip of the voice coil bobbin.
以上のように構成されたスピーカについて、以下その動
作について説明する。スピーカは振動板。The operation of the speaker configured as above will be described below. The speaker is a diaphragm.
ボイスコイル、などの振動系とマグネット、ポ〒ル、プ
レート、ヨーク、よりなる磁気回路系よりなる。一様な
磁場の中にあるボイスコイルに音声電流が流れるとボイ
スコイルに上下方向の駆動力が発生し電流に応じて振動
する。この振動を正しく振動板に伝え、音波として放出
される。It consists of a vibration system such as a voice coil, and a magnetic circuit system consisting of a magnet, pole, plate, and yoke. When an audio current flows through a voice coil in a uniform magnetic field, a vertical driving force is generated in the voice coil, causing it to vibrate in response to the current. This vibration is properly transmitted to the diaphragm and emitted as sound waves.
次に振動板の製造方法について述べる。クラフトパルプ
繊維（繊維長２〜３ｍｍ）とキトサンとポリアミド・エ
ピクロルヒドリン樹脂と４００メツシユパスのリン片状
マイカと、ポリビニルアルコール繊維（繊維長３Ｍ〜１
０ ｍｍ ）を重量比１４：３：３：６０：２０の割合
で混合した後、水を加え分散攪拌して３％溶液にし、抄
紙機により抄造した後、撮動板成型内で１２０℃に加熱
して発泡させ見かけ密度、ｏ、１ｙ／ｃ４の振動板とし
た。Next, a method for manufacturing the diaphragm will be described. Kraft pulp fiber (fiber length 2-3 mm), chitosan, polyamide epichlorohydrin resin, flaky mica of 400 mesh pass, polyvinyl alcohol fiber (fiber length 3M-1
0 mm ) at a weight ratio of 14:3:3:60:20, water was added and dispersed and stirred to make a 3% solution, and after making paper using a paper machine, it was heated to 120 °C in a moving plate molding machine. It was heated and foamed to form a diaphragm with an apparent density of o, 1y/c4.
以上のように本実施例によれば、キトサンとクラフトパ
ルプがエポキシ基によシ架橋反応されて結合しているた
め、従来の紙パルプのような繊維同士のからみ合いだけ
よりも強く、またリン片状マイカにより強化されさらに
多孔質とすることによシ厚みを厚くして振動板として使
用できるためて非常に曲げ剛性が大きく、振動板が変形
しにぐ（分割共振も生ぜず良好な音響特性が得られるも
のである。なお振動板形状はドーム状でもコーン状でも
同様の効果が得られるもので、さらにサンドインチ構造
平板振動板の心材として吏用しても曲げ剛性が大きいた
め良好な特性が得られるものである。As described above, according to this example, chitosan and kraft pulp are bonded together through a crosslinking reaction using epoxy groups, which is stronger than the entanglement of fibers alone as in conventional paper pulp, and is phosphorescent. By making it porous and reinforced by flaky mica, it can be thickened and used as a diaphragm, so it has extremely high bending rigidity, and the diaphragm is resistant to deformation (no split resonance occurs, resulting in good acoustics). The diaphragm shape can be dome-shaped or cone-shaped, and the same effect can be obtained, and even when used as the core material of a sand-inch structure flat-plate diaphragm, it has good bending rigidity. characteristics can be obtained.
さらに本実施例ではパルプとキトサンとポリアミドエピ
クロルヒドリン樹脂とマイカおよびポリビニルアルコー
ル繊維の配合比は１４：３：３：ｓｏ： ２０としたが
、要求される振動板の物性に応じて自由に変えることが
可能で例えばポリビニルアルコール繊維を増加させるこ
とにより発泡倍率を高くしたり、マイカを増加させるこ
とにより弾性率を高くすることができるものである。Furthermore, in this example, the blending ratio of pulp, chitosan, polyamide epichlorohydrin resin, mica, and polyvinyl alcohol fiber was set to 14:3:3:so:20, but it can be freely changed depending on the required physical properties of the diaphragm. For example, it is possible to increase the foaming ratio by increasing the amount of polyvinyl alcohol fibers, or to increase the elastic modulus by increasing the amount of mica.
発明の効果
以上のように本発明は、クラフトパルプとキトサンとポ
リアミド・エピクロルヒドリン樹脂とリン片状マイカと
ポリビニルアルコール繊維トラ混合抄造した後加熱発泡
させた多孔体を振動板としたもので、キトサンとクラフ
トパルプがエポキシ基により部分的に化学結合されてお
り、従来の紙パルプの繊維同士のからみ合いより強度が
大きく、強化材としてリン片状マイカが混合されている
ため非常に弾性率が大きい。またポリビニルアルコール
繊維をバインダーとして水蒸気により発泡させているた
め多孔質となり見かけの密度を小さくすることができ、
振動板とするとき同重量で厚みを犬きぐすることによシ
曲げ剛性を大きくすることができる利点がある。さらに
繊維間あるいはリン片状マイカの層間のすべりにより内
部損失も大きくすることができ歪が少なく、高″域共撮
周波数が高い良好な音響特性を有する優れたスピーカ全
実現できるものである。Effects of the Invention As described above, the present invention is a diaphragm made of a porous material made by mixing kraft pulp, chitosan, polyamide/epichlorohydrin resin, flaky mica, and polyvinyl alcohol fibers and then heating and foaming the material. The kraft pulp is partially chemically bonded by epoxy groups, making it stronger than the intertwined fibers of conventional paper pulp, and because it contains scale-like mica as a reinforcing material, it has a very high elastic modulus. In addition, since polyvinyl alcohol fiber is used as a binder and foamed with water vapor, it becomes porous and has a lower apparent density.
When used as a diaphragm, there is an advantage that bending rigidity can be increased by increasing the thickness with the same weight. Furthermore, the internal loss can be increased due to the slippage between the fibers or between the layers of scale-like mica, thereby making it possible to realize an excellent speaker with low distortion and good acoustic characteristics with a high common sound frequency.
Claims (1)
ル化されたキトサンと、ポリアミド・エピクロルヒドリ
ン樹脂とリン片状マイカおよびポリビニルアルコール繊
維とが混合抄造され、加熱されて反応発泡させた構造物
からなるスピーカ用振動板。A speaker made of a structure made by mixing kraft pulp, chitosan, which is a natural polymer with deacetylated chitin, polyamide/epichlorohydrin resin, flaky mica, and polyvinyl alcohol fibers, and heating and foaming the mixture. diaphragm for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12293987A JPH07112308B2 (en) | 1987-05-20 | 1987-05-20 | Vibration plate for speakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12293987A JPH07112308B2 (en) | 1987-05-20 | 1987-05-20 | Vibration plate for speakers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63287298A true JPS63287298A (en) | 1988-11-24 |
| JPH07112308B2 JPH07112308B2 (en) | 1995-11-29 |
Family
ID=14848352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12293987A Expired - Lifetime JPH07112308B2 (en) | 1987-05-20 | 1987-05-20 | Vibration plate for speakers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07112308B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054572A (en) * | 2004-08-10 | 2006-02-23 | Foster Electric Co Ltd | Diaphragm for electroacoustic transducer and manufacturing method thereof |
| US7849958B2 (en) * | 2005-04-21 | 2010-12-14 | Pioneer Corporation | Vibration system part for speaker device and manufacturing method thereof |
| CN113079451A (en) * | 2021-03-29 | 2021-07-06 | 国光电器股份有限公司 | Foaming cone for loudspeaker and preparation method and application thereof |
-
1987
- 1987-05-20 JP JP12293987A patent/JPH07112308B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006054572A (en) * | 2004-08-10 | 2006-02-23 | Foster Electric Co Ltd | Diaphragm for electroacoustic transducer and manufacturing method thereof |
| US7849958B2 (en) * | 2005-04-21 | 2010-12-14 | Pioneer Corporation | Vibration system part for speaker device and manufacturing method thereof |
| CN113079451A (en) * | 2021-03-29 | 2021-07-06 | 国光电器股份有限公司 | Foaming cone for loudspeaker and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07112308B2 (en) | 1995-11-29 |
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