JPH03232400A - Loudspeaker diaphragm - Google Patents
Loudspeaker diaphragmInfo
- Publication number
- JPH03232400A JPH03232400A JP2768690A JP2768690A JPH03232400A JP H03232400 A JPH03232400 A JP H03232400A JP 2768690 A JP2768690 A JP 2768690A JP 2768690 A JP2768690 A JP 2768690A JP H03232400 A JPH03232400 A JP H03232400A
- Authority
- JP
- Japan
- Prior art keywords
- chitin
- fiber
- speaker diaphragm
- chitosan
- slurry
- 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
- 229920002101 Chitin Polymers 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 239000002759 woven fabric Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 229920003043 Cellulose fiber Polymers 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims description 5
- 229920001661 Chitosan Polymers 0.000 abstract description 8
- 239000002023 wood Substances 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 235000019253 formic acid Nutrition 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 102000004169 proteins and genes Human genes 0.000 abstract description 2
- 108090000623 proteins and genes Proteins 0.000 abstract description 2
- 238000002166 wet spinning Methods 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 9
- 230000000704 physical effect Effects 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002655 kraft paper Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920005615 natural polymer Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000238424 Crustacea Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004177 elastic tissue Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野］
本発明は、スピーカ振動板に関するものであり、特に、
その形成材料に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a speaker diaphragm, and in particular,
It relates to the material from which it is formed.
（従来の技術〕
スピーカ振動板はその物性として、−船釣に、（１）軽
量、（２）高弾性率、（３）高剛性、（４）振動エネル
ギーの高内部損失等の各条件を具備すべきであるとされ
ている。(Prior art) The speaker diaphragm has physical properties that are suitable for boat fishing, such as (1) light weight, (2) high elastic modulus, (3) high rigidity, and (4) high internal loss of vibration energy. It is said that it should be equipped.
従来、スピーカ振動板として、木材バルブの抄造による
紙製スピーカ振動板が汎用されている。Conventionally, as a speaker diaphragm, a paper speaker diaphragm made of a wood bulb has been widely used.
また、カーボン繊維、ガラス繊維、あるいはシリコンカ
ーバイト繊維等の高弾性繊維から成る織布を成形したも
のや、粉末状もしくはフレーク状のキチンをバルブスラ
リーと混合し抄造して得られるキチンを含有した紙製ス
ピーカ振動板も提案されている。In addition, products containing chitin obtained by molding woven fabrics made of highly elastic fibers such as carbon fiber, glass fiber, or silicon carbide fiber, or by mixing powdered or flaky chitin with valve slurry and making paper. Paper speaker diaphragms have also been proposed.
ところが、上記従来の紙製スピーカ振動板は、比較的軽
量に成形もでき、振動エネルギーの内部損失も大きいが
、弾性率が著しく小さいという問題点を有している。そ
のため、スピーカ振動板としては不十分であり、多数の
改善がなされ、また提案されている。However, although the above-mentioned conventional paper speaker diaphragm can be molded to be relatively lightweight and has a large internal loss of vibration energy, it has a problem in that its modulus of elasticity is extremely low. Therefore, it is insufficient as a speaker diaphragm, and many improvements have been made and proposed.
一方、上記のカーボン繊維織布等の高弾性繊維織布を成
形して成るスピーカ振動板においては、大きな弾性率が
得られるかわりに、振動エネルギーの内部損失は小さく
、かつ、軽量に成形できないという問題点を有している
。On the other hand, although speaker diaphragms made by molding high-elastic fiber woven fabrics such as the carbon fiber woven fabrics described above have a large elastic modulus, the internal loss of vibration energy is small, and it is difficult to mold them into lightweight materials. There are problems.
また、上記のキチンを含有した紙製スピーカ振動板の場
合、キチンが繊維状になっていないためバルブ繊維と均
一に混合分散することが困難であり、キチンとバルブ繊
維との結合も形成されないので、十分な強度が得られな
い。さらに、キチンとバルブ繊維とを接着させるバイン
ダ樹脂を必要とし、製造工程が甚だ繁雑になる等のため
、スピーカ振動板としては不適切であるという問題点を
有している。In addition, in the case of the above-mentioned paper speaker diaphragm containing chitin, since the chitin is not in the form of fibers, it is difficult to mix and disperse the chitin uniformly with the valve fibers, and the bond between the chitin and the valve fibers is not formed. , sufficient strength cannot be obtained. Furthermore, it requires a binder resin to bond the chitin and the valve fibers, which makes the manufacturing process extremely complicated, and therefore there is a problem that it is unsuitable for use as a speaker diaphragm.
本発明の目的は、以上の問題点を解消するために、製造
が容易で、かつ、優れた物性を具備するスピーカ振動板
を得ることにある。An object of the present invention is to obtain a speaker diaphragm that is easy to manufacture and has excellent physical properties in order to solve the above problems.
（課題を解決するための手段］
請求項第１項の発明に係るスピーカ振動板は、上記の課
題を解決するために、キチン繊維織布をたとえば′熱プ
レス成形して成ることを特徴としている。(Means for Solving the Problem) In order to solve the above problem, the speaker diaphragm according to the invention of claim 1 is characterized in that it is formed by heat press molding a chitin fiber woven fabric, for example. .
請求項第２項の発明に係るスピーカ振動板は、上記の課
題を解決するために、キチン繊維とセルロース系繊維ス
ラリーたとえば木材パルプスラリーとを混合し抄造して
成ることを特徴としている。In order to solve the above-mentioned problem, the speaker diaphragm according to the invention of claim 2 is characterized in that it is made by mixing chitin fibers and cellulose fiber slurry, such as wood pulp slurry.
（作 用］
キチンは昆虫類の羽翼または甲殻類の表皮を構゛成する
天然高分子より成る物質であり、軽量で大きな弾性率を
有し、振動エネルギーの内部損失も大きいという物性を
備えている。(Function) Chitin is a substance consisting of a natural polymer that constitutes the wings of insects or the epidermis of crustaceans, and has the physical properties of being lightweight, having a large elastic modulus, and having a large internal loss of vibrational energy. There is.
請求項第１項の構成によれば、このキチンを繊維化し織
布とすることにより、従来のスピーカ振動板成形技術を
そのまま応用して、容易に周波数特性の優れたスピーカ
振動板を得ることができる。According to the structure of claim 1, by converting this chitin into fibers and making it into a woven fabric, it is possible to easily obtain a speaker diaphragm with excellent frequency characteristics by applying conventional speaker diaphragm forming technology as is. can.
請求項第２項の構成によれば、キチンは水との親和性が
良いので、キチン繊維はセルロース系繊維スラリーと容
易に混抄する。従って、スピーカ振動板の抄造が容易に
行われ、キチンの優れた物性を付与したスピーカ振動板
を得ることができる。According to the second aspect of the invention, since chitin has good affinity with water, chitin fibers can be easily mixed with cellulose fiber slurry. Therefore, the speaker diaphragm can be easily manufactured, and a speaker diaphragm having excellent physical properties can be obtained.
〔実施例１〕
蟹の甲皮からミネラル質を希酸で、タンパク質を希アル
カリで、いずれも溶解させ除去することによってキチン
を得た。次に、キチンを濃アルカリで処理して得られた
溶削可溶性のキトサンを蟻酸で溶解する。このキトサン
溶液を、湿式紡糸法により紡糸合口より押し出し、凝固
させて連続紡糸したキトサン繊維を得た後、キトサン繊
維をアセチル化して、２デニールのキチン繊維を得た。[Example 1] Chitin was obtained from crab carapace by dissolving and removing minerals with dilute acid and proteins with dilute alkali. Next, chitosan, which is soluble in cutting and obtained by treating chitin with a concentrated alkali, is dissolved in formic acid. This chitosan solution was extruded from a spinning spout by a wet spinning method and coagulated to obtain continuously spun chitosan fibers, and then the chitosan fibers were acetylated to obtain 2-denier chitin fibers.
この２デニールのキチン繊維を５００本束ねた１０００
デニールのキチン繊維を縦糸および横糸とすることによ
って得たキチン繊維織布を熱プレス成形した。こうして
、直径１０ｃｍのコーン型スピーカ振動板ができあがっ
た。キチン繊維は、従来例に記載の他の高弾性繊維に比
べて伸び率が大きいので、深型のコーン型スピーカ振動
板を容易に成形することができる。1000 bundles of 500 chitin fibers of 2 denier
A chitin fiber woven fabric obtained by using denier chitin fibers as warp and weft yarns was hot press molded. In this way, a cone-shaped speaker diaphragm with a diameter of 10 cm was completed. Since chitin fiber has a higher elongation rate than other high modulus fibers described in the conventional example, a deep cone-shaped speaker diaphragm can be easily formed.
上記のコーン型スピーカ振動板を用いて試作したスピー
カの周波数特性を第１図にＡ（実線）で示す。The frequency characteristics of a speaker prototyped using the above cone-shaped speaker diaphragm are shown by A (solid line) in FIG.
比較例として、カーボン繊維を縦糸および横糸に用いた
織布（東し株式会社製トレカ＃６１５１Ｂ）を使用して
、上記のコーン型スピーカ振動板と同一形状のものを成
形した。このカーボン繊維から成るコーン型スピーカ振
動板を用いて試作したスピーカの周波数特性を第１図に
８（破線ンで示す。As a comparative example, a fabric having the same shape as the cone-shaped speaker diaphragm described above was molded using a woven fabric (Trading Card #6151B manufactured by Toshi Co., Ltd.) in which carbon fiber was used for the warp and weft. The frequency characteristics of a prototype speaker manufactured using this cone-shaped speaker diaphragm made of carbon fiber are shown in FIG.
スピーカの高音域における周波数特性は、コーン型スピ
ーカ振動板の剛性限界による分割共振で制限される。請
求項第１項の発明に係るキチン繊維から成るスピーカ振
動板は、軽量、かつ、曲げ剛性が非常に大きく、振動板
が変形しにくいことや分割共振も抑えられるので、第１
図から明らかなように、優れた高域共振周波数特性が得
られた。さらに、弾性率および振動エネルギーの内部損
失も大きいため、低・中音域においても良好な音響特性
が得られている。The frequency characteristics of a speaker in the treble range are limited by split resonance due to the rigidity limit of the cone-shaped speaker diaphragm. The speaker diaphragm made of chitin fiber according to the invention of claim 1 is lightweight and has very high bending rigidity, making the diaphragm difficult to deform and suppressing split resonance.
As is clear from the figure, excellent high-frequency resonance frequency characteristics were obtained. Furthermore, since the elastic modulus and internal loss of vibration energy are large, good acoustic characteristics are obtained even in the low and medium ranges.
［実施例２〕
実施例１で得られた２デニールのキチン繊維を長さ３ｍ
ｍに裁断し、セルロース系繊維スラリーとしてのクラフ
ト木材バルブスラリーと重量比５０％となるように混合
した。これを抄紙機により抄造することによって直径１
０−のコーン型スピーカ振動板を得た。このスピーカ振
動板は細かく裁断したキチン繊維を用いているので、木
材バルブ繊維との混合分散状態は良好であった。また、
キチンは天然高分子であるため水との親和性が良く、特
殊なバインダ樹脂を必要とせずに容易に抄造成形するこ
とができた。[Example 2] The 2 denier chitin fiber obtained in Example 1 was made into a length of 3 m.
The fibers were cut into pieces of 50% by weight and mixed with kraft wood valve slurry as a cellulose fiber slurry at a weight ratio of 50%. By making paper using a paper machine, a diameter of 1
A cone-shaped speaker diaphragm of 0- was obtained. Since this speaker diaphragm uses finely cut chitin fibers, the mixing and dispersion state with the wood valve fibers was good. Also,
Since chitin is a natural polymer, it has good affinity with water and could be easily formed into paper without the need for a special binder resin.
上記のコーン型スピーカ振動板を用いて試作したスピー
カの周波数特性を第２図にＣ（実線）で示す。The frequency characteristics of a speaker prototyped using the above cone-shaped speaker diaphragm are shown by C (solid line) in FIG.
比較例として、同様のクラフト木材バルブのみを使用し
て、上記のコーン型スピーカ振動板と同一形状のものを
抄造成形した。このクラフト木材パルプから成るコーン
型スピーカ振動板を用いて試作したスピーカの周波数特
性を第２図にＤ（破線）で示す。As a comparative example, a similar kraft wood valve was used to fabricate a product having the same shape as the cone-shaped speaker diaphragm described above. The frequency characteristics of a speaker prototyped using this cone-shaped speaker diaphragm made of kraft wood pulp are shown by D (broken line) in FIG.
請求項第２項の発明に係るキチン繊維とセルロース系繊
維とを混合し抄造したスピーカ振動板は、従来の紙製ス
ピーカ振動板にキチンの物性が付与され、軽量で剛性率
が向上し、振動板の変形や分割共振が抑えられるので、
第２図から明らかなように、高域共振周波数特性が従来
よりも平滑で優れている。さらに、弾性率および振動エ
ネルギーの内部損失も大きいため、中音域においても良
好な音響特性が得られている。The speaker diaphragm made by mixing chitin fibers and cellulose fibers according to the invention of claim 2 has the physical properties of chitin added to the conventional paper speaker diaphragm, is lightweight, has improved rigidity, and has vibration resistance. Since plate deformation and split resonance are suppressed,
As is clear from FIG. 2, the high-frequency resonant frequency characteristics are smoother and better than conventional ones. Furthermore, since the elastic modulus and internal loss of vibration energy are large, good acoustic characteristics are obtained even in the midrange.
（発明の効果）
請求項第１項の発明に係るスピーカ振動板は、以上のよ
うに、キチン繊維織布を成形して成る構成である。(Effects of the Invention) As described above, the speaker diaphragm according to the invention of claim 1 is formed by molding a chitin fiber woven fabric.
それゆえ、軽量、高剛性、高弾性および振動エネルギー
の高内部損失のスピーカ振動板が容易に得られ、歪みが
少なく、高域共振周波数が高い優れた音響特性を有する
スピーカを実現することができる。Therefore, a speaker diaphragm that is lightweight, has high rigidity, high elasticity, and high internal loss of vibration energy can be easily obtained, and a speaker that has excellent acoustic characteristics with low distortion and high high resonance frequency can be realized. .
請求項第２項の発明に係るスピーカ振動板は、以上のよ
うに、キチン繊維とセルロース系繊維とを混合し抄造し
て成る構成である。As described above, the speaker diaphragm according to the second aspect of the invention is formed by mixing chitin fibers and cellulose fibers.
それゆえ、軽量、高剛性、高弾性および振動エネルギー
の高内部損失のスピーカ振動板が容易に得られ、歪みが
少なく、高域共振周波数が平滑で優れた音響特性を有す
るスピーカを実現することができる。Therefore, a speaker diaphragm that is lightweight, has high rigidity, high elasticity, and high internal loss of vibration energy can be easily obtained, and a speaker with low distortion, smooth high resonance frequency, and excellent acoustic characteristics can be realized. can.
第１図は本発明の一実施例を示すものであって、スビ・
−力の周波数特性を示すグラフである。
第２図は本発明の他の実施例を示すものであって、他の
スピーカの周波数特性を示すグラフである。FIG. 1 shows an embodiment of the present invention.
- It is a graph showing the frequency characteristics of force. FIG. 2 shows another embodiment of the present invention, and is a graph showing the frequency characteristics of another speaker.
Claims (1)
ピーカ振動板。 ２、キチン繊維とセルロース系繊維スラリーとを混合し
抄造して成ることを特徴とするスピーカ振動板。[Claims] 1. A speaker diaphragm formed by molding chitin fiber woven fabric. 2. A speaker diaphragm characterized by being formed by mixing chitin fibers and cellulose fiber slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2027686A JP2562218B2 (en) | 1990-02-07 | 1990-02-07 | Speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2027686A JP2562218B2 (en) | 1990-02-07 | 1990-02-07 | Speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03232400A true JPH03232400A (en) | 1991-10-16 |
| JP2562218B2 JP2562218B2 (en) | 1996-12-11 |
Family
ID=12227851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2027686A Expired - Fee Related JP2562218B2 (en) | 1990-02-07 | 1990-02-07 | Speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2562218B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338399A (en) * | 1986-08-04 | 1988-02-18 | Matsushita Electric Ind Co Ltd | Speaker diaphragm |
| JPH0265399A (en) * | 1988-08-31 | 1990-03-06 | Matsushita Electric Ind Co Ltd | Diaphragm for speaker |
-
1990
- 1990-02-07 JP JP2027686A patent/JP2562218B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338399A (en) * | 1986-08-04 | 1988-02-18 | Matsushita Electric Ind Co Ltd | Speaker diaphragm |
| JPH0265399A (en) * | 1988-08-31 | 1990-03-06 | Matsushita Electric Ind Co Ltd | Diaphragm for speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2562218B2 (en) | 1996-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100230673B1 (en) | Acoustic diaphragm and method for producing same | |
| US5274199A (en) | Acoustic diaphragm and method for producing same | |
| DE3689940T2 (en) | Molding compound based on bacterially produced cellulose. | |
| CN102851777B (en) | Preparation method of fibroin blending regenerated cellulose fiber | |
| CN108085772B (en) | Cellulose nano-fibril reinforced polyurethane fiber and preparation method and application thereof | |
| CN108978326B (en) | Sizing agent for loudspeaker drum paper | |
| CN110818920B (en) | Cellulose nanocrystal/polylactic acid composite material and preparation method and application thereof | |
| CN111910462B (en) | Paper cone containing carbon fibers for loudspeaker and preparation method thereof | |
| CA2206250A1 (en) | Process for producing cellulose fibres | |
| JP4733322B2 (en) | Acoustic vibration member | |
| JP3827153B2 (en) | Diaphragm for electroacoustic transducer | |
| JPH03232400A (en) | Loudspeaker diaphragm | |
| CN113388896B (en) | Preparation method of hydrophobic oleophylic nanocellulose based on immobilized enzyme chemistry-oxidative degumming | |
| JP2936703B2 (en) | Speaker diaphragm | |
| JPH05328486A (en) | Electroacoustic transducer | |
| JPH09107595A (en) | Diaphragm for electroacoustic transducer | |
| KR100187000B1 (en) | Diaphragm for speaker | |
| KR960007816B1 (en) | Diaphragm for electric acoustic transducer | |
| JPH0644835B2 (en) | Electro-acoustic transducer | |
| JPH0431639B2 (en) | ||
| JPH0646836B2 (en) | Electro-acoustic transducer | |
| JPS631297A (en) | Electroacoustic transducer | |
| CN107057189B (en) | Multilayer natural fiber sheet and thermoplastic composite material and preparation method thereof | |
| JPS62278899A (en) | Diaphragm for speaker | |
| JP2569407B2 (en) | Algin-based fiber entangled body and method for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |