JPS6195697A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPS6195697A JPS6195697A JP21679684A JP21679684A JPS6195697A JP S6195697 A JPS6195697 A JP S6195697A JP 21679684 A JP21679684 A JP 21679684A JP 21679684 A JP21679684 A JP 21679684A JP S6195697 A JPS6195697 A JP S6195697A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- substrate
- speaker
- base material
- acrylic resin
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】 １」１１ 本発明は、スピーカ用振動板に関する。[Detailed description of the invention] 1”11 The present invention relates to a diaphragm for a speaker.
九ＵＬＬ
一般にスピーカ用振動板に要求される性能としては、主
にスピーカの出力音圧周波数特性などが良好に得られる
ように、軽旦でかつ高ヤング率及び低密度で適度な内部
損失を有していることである。すなわち、ヤング率が高
く密度が小さい程振動板の共振周波数が高くなり、ピス
トン運動領域が拡大されるためスピーカの周波数帯域が
広くなり、また内部損失が大きいほど振動板の分割共振
が減少して周波数特性が平坦化する。9ULL Generally speaking, the performance required of a speaker diaphragm is to have a light weight, high Young's modulus, low density, and appropriate internal loss so that the output sound pressure frequency characteristics of the speaker can be obtained well. That's what I'm doing. In other words, the higher the Young's modulus and the lower the density, the higher the resonant frequency of the diaphragm and the wider the piston movement area, which widens the frequency band of the speaker.The larger the internal loss, the less the split resonance of the diaphragm. Frequency characteristics become flat.
このようなことから上記の要求される性能を充足する振
動板として、従来から叩解を施した天然繊維、化学繊維
またはこれらを混合したｍＮ材料の抄造によって形成さ
れる振動板が広く製造されている。かかる振動板は抄造
により製造されているので水分、湿気には弱く、水分の
吸収よる膨潤やその性能の劣化等が起こる。For this reason, as a diaphragm that satisfies the above-mentioned performance requirements, diaphragms formed by paper-making of beaten natural fibers, chemical fibers, or mN materials that are a mixture of these have been widely manufactured. . Since such a diaphragm is manufactured by paper-making, it is susceptible to water and moisture, and swelling and deterioration of its performance occur due to absorption of water.
しかし、最近ではスピーカの野外での使用や自動車にお
けるドアマウントやリアマウントの場合等のように、ス
ピーカの使用態様は拡大され、水、湿気及び太陽光に晒
されるスピーカが増えている。However, recently, the manner in which speakers are used has expanded, such as when speakers are used outdoors and when mounted on doors or rear in automobiles, and more and more speakers are being exposed to water, humidity, and sunlight.
従って、スピーカの振動板自体にも撥水性、耐水性及び
耐候性等が要求されてきている。Therefore, the speaker diaphragm itself is required to have water repellency, water resistance, weather resistance, and the like.
振動板の耐水性を増加せしめる従来の方法としては、例
えば抄造後の基材に熱硬化性樹脂を塗布により付着せし
め加熱加圧等の処理を施して主面を覆う方法や、抄造後
の基材に適当なポリマーの溶液を含浸し、乾燥、加熱、
加圧等の処理を施して、該ポリマーによる樹脂で基材の
主面から内部までの全体を覆う方法が知られている。Conventional methods for increasing the water resistance of diaphragms include, for example, applying a thermosetting resin to the base material after papermaking and applying heat and pressure to cover the main surface; The material is impregnated with a suitable polymer solution, dried, heated,
A method is known in which a process such as pressurization is applied to cover the entire base material from the main surface to the inside with a resin made of the polymer.
しかしながら、上記従来方法の前者の防水処理がなされ
た振動板においては、防水性が高くヤング率も大きいが
、密度が大きく内部損失が小さいために音圧周波数特性
の平坦化が困難である。また、後者の方法を用いた場合
には、充分な防水性を有するまでポリマーの溶液を含浸
付着せしめると基材の重母が増加しかつヤング率が小さ
くなり、音圧周波数特性の高音域における出力レベルの
減少と共に能率も悪くなるのが常であった。However, although the diaphragm subjected to the former waterproofing treatment of the conventional method has high waterproofness and a large Young's modulus, it is difficult to flatten the sound pressure frequency characteristics because of its large density and small internal loss. In addition, when using the latter method, if the polymer solution is impregnated and adhered until it has sufficient waterproofness, the weight of the base material will increase and the Young's modulus will decrease, resulting in a decrease in the high frequency range of the sound pressure frequency characteristic. Efficiency typically deteriorated as the output level decreased.
さらに上記いずれの方法においても耐候性に問題が在り
、例えば、強力な直射日光を長時間受けた場合などは振
動板を覆う樹脂が劣化し黄変する。Furthermore, in any of the above methods, there is a problem in weather resistance, for example, when exposed to strong direct sunlight for a long period of time, the resin covering the diaphragm deteriorates and turns yellow.
このように従来のスピーカ用振動板は、ヤング率、密度
及び内部損失等の振動板としての物理特性と防水性耐候
性とを同時に満足することは出来なかった。As described above, conventional speaker diaphragms have not been able to simultaneously satisfy the physical properties of a diaphragm, such as Young's modulus, density, and internal loss, as well as waterproofness and weather resistance.
及Ｕ
そこで本発明の目的は、高いヤング率、低い密度及び適
度の内部損失を備えつつ耐水性を有し充分なる耐候性を
有したスピーカ用振動板を提供することである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a diaphragm for a speaker that has a high Young's modulus, a low density, an appropriate internal loss, water resistance, and sufficient weather resistance.
本発明のスピーカ用振動板は、天然ｌＩ緒、化学繊維ま
たはこれらの混合物を抄造してなりかつアクリル系樹脂
の溶液を含浸し付着硬化せしめてなる基材からなること
を特徴としている。The speaker diaphragm of the present invention is characterized in that it is made of a base material made of natural lumber, chemical fibers, or a mixture thereof, impregnated with an acrylic resin solution, and then adhered and hardened.
１］Ｌ−１
以下、本発明の一実施例を添附図面及び以下の表に基づ
いて説明する。1]L-1 Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings and the table below.
まず、原料として天然繊維例えばＮＢＫＰ （針葉樹晒
しクラフトバルブ）に叩解を施し、叩解度２０〜２２度
ＳＲに調整する。その後、抄紙タンクの懸濁液中に分散
させ、所望の振動板形状例えばコーン形状の抄き網にて
を抄紙して、その後、１８０℃程度の温度のコーン形状
の金型にて３゜０Ｋｇ／Ｃｍ２程度の加圧プレス下で乾
燥させ基材を形成する。First, a natural fiber such as NBKP (softwood bleached kraft valve) is beaten as a raw material, and the beating degree is adjusted to 20 to 22 degrees SR. Thereafter, it is dispersed in a suspension in a papermaking tank, and a desired diaphragm shape, for example, is made into paper using a cone-shaped papermaking screen.Then, the paper is made into paper using a cone-shaped mold at a temperature of about 180°C to produce 3°0 kg of diaphragm. A base material is formed by drying under a pressure press of about /Cm2.
次に、アクリル系樹脂としてＭＭＡ樹脂（メチルメタア
クリレート）をシンナー等の適当な溶剤により稀釈して
樹脂溶液を第１表の組成の如く配合して調製する。Next, a resin solution is prepared by diluting MMA resin (methyl methacrylate) as an acrylic resin with a suitable solvent such as thinner and blending it as shown in Table 1.
そして、調製した該樹脂溶液にコーン形状の基材を浸し
て、基材を形成するバルブのＩＪＡ雑間に該溶液を含浸
せしめ、基材中の繊維にアクリル系樹脂を付着させる。Then, a cone-shaped base material is immersed in the prepared resin solution to impregnate the IJA parts of the valve forming the base material, and the acrylic resin is attached to the fibers in the base material.
その後、乾燥機で６０℃〜８０℃程度の温度の熱風によ
って溶剤分を揮発乾燥させる。また、必要に応じて再度
含浸したり、あるいは含浸後の基材にＭＭＡ樹脂等をス
プレー等による塗布で、さらに付着せしめることにより
、より強固な被膜を形成することが出来る。Thereafter, the solvent is volatilized and dried using hot air at a temperature of about 60° C. to 80° C. in a dryer. Moreover, a stronger coating can be formed by impregnating the substrate again as necessary, or by applying MMA resin or the like to the impregnated base material by spraying or the like to further adhere it.
これらの工程を経た基材を所定形状に裁断してスピーカ
用振動板を得る。The base material that has gone through these steps is cut into a predetermined shape to obtain a speaker diaphragm.
第１図は、このようにして得られた本実施例のスピーカ
用振動板１の断面図であってコーン形状のものを示して
いる。FIG. 1 is a sectional view of the speaker diaphragm 1 of this example obtained in this way, and shows a cone-shaped one.
第２図は、第１図に円Ａで示す部分の拡大断面図であっ
て、バルブの繊維２は、アクリル系樹脂３により目止め
されている。FIG. 2 is an enlarged sectional view of the part indicated by circle A in FIG. 1, and the fibers 2 of the bulb are sealed with acrylic resin 3.
ここで目止め剤としてポリウレタン系樹脂や酢酸ビニル
系樹脂が一般に使用されているが、これらにおいては極
端に耐候性が悪く樹脂部分が劣化する為に耐候性に優れ
たアクリル系樹脂による目止めが行なわれている。Polyurethane resins and vinyl acetate resins are generally used as sealants here, but these have extremely poor weather resistance and cause the resin parts to deteriorate, so acrylic resins, which have excellent weather resistance, are used as sealants. It is being done.
得られた本実施例による振動板の物理特性と防水性と耐
候性との試験結果を示す。The test results for the physical properties, waterproofness, and weatherability of the obtained diaphragm according to this example are shown.
まず初めに、第２表おいては、本実施例の振動板と、未
だ防水処理をされていない基材のみからなる撮動板との
各々の物性値を示している。First of all, Table 2 shows the physical property values of the diaphragm of this example and the imaging plate made only of a base material that has not yet been waterproofed.
第２表
両者を比較してみると本実施例の振動板は、密度の極端
な増加をなくした上で基材とほぼ同等の物性値を得てお
り、処理後においても物理的特性の悪化はないことが分
る。Comparing the two in Table 2, the diaphragm of this example has almost the same physical properties as the base material without an extreme increase in density, and even after treatment, the diaphragm has physical properties that are not deteriorated. It turns out that there is no.
次に、ＪＩＳ−Ｐ８１１７に基づく透気度試験を本発明
の撮動板及び未処理基材について行って両者の防水性を
比較する。その結果、１ｏｏｃｃ通加時間が未処理基材
の場合は５３．３秒であるのに対し本実施例の振動板の
場合は１０分後も１００ｃｃまで達しなかった。このこ
とは本発明の振動板が例えばポリウレタン系樹脂による
含浸処理を施した振動板基材と同等の優れた防水性を有
していることを示している。Next, an air permeability test based on JIS-P8117 was conducted on the imaging plate of the present invention and the untreated base material, and the waterproof properties of the two were compared. As a result, the 100cc application time was 53.3 seconds in the case of the untreated base material, but in the case of the diaphragm of this example, it did not reach 100cc even after 10 minutes. This indicates that the diaphragm of the present invention has an excellent waterproof property equivalent to that of a diaphragm base material impregnated with, for example, a polyurethane resin.
最後に、光源をカーボンアークとしたサンシャインスー
パーロングライフウェザ−メーター（スガ試験機株式会
社、型式ＷＥＬ−８ＵＮ−ＨＤ。Finally, a Sunshine Super Long Life Weather Meter (Suga Test Instruments Co., Ltd., Model WEL-8UN-HD) uses a carbon arc as a light source.
ブラックパネル表面温度６３度、水かけなし）による耐
候性試験における白色度の経時変化及び黄色化度の経時
変化を本発明の振動板及びポリウレタン系樹脂で含浸処
理した振動板について各々行って両者を比較してみる。The diaphragm of the present invention and the diaphragm impregnated with polyurethane resin were tested for the change in whiteness over time and the change in yellowing over time in a weather resistance test (black panel surface temperature 63 degrees, no water splashing). Let's compare.
第３図は白色度の経時変化を示すグラフであり、線Ａは
本実施例の振動板の白色度を示し、線Ｂはポリウレタン
系樹脂で含浸処理した振動板の白色度を示す。第３図よ
り５００時間経過後も本実施例の振動板はポリウレタン
系樹脂のものより白色度の低下が微小であることが分る
。FIG. 3 is a graph showing the change in whiteness over time, where line A shows the whiteness of the diaphragm of this example, and line B shows the whiteness of the diaphragm impregnated with polyurethane resin. From FIG. 3, it can be seen that even after 500 hours, the whiteness of the diaphragm of this example decreased less than that of the polyurethane resin.
第４図は黄色化度の経時変化を示すグラフであり、線Ａ
は本実施例の振動板の黄色化度を示し、線Ｂはポリウレ
タン系樹脂で含浸処理した振動板の黄色化度を示す。第
４図より５００時間経過後も本実施例の振動板はほとん
ど変化せず、ポリウレタン系樹脂の場合のような黄変は
なく樹脂の劣化は起こらないことが分る。Figure 4 is a graph showing the change in yellowing degree over time, and line A
indicates the degree of yellowing of the diaphragm of this example, and line B indicates the degree of yellowing of the diaphragm impregnated with polyurethane resin. From FIG. 4, it can be seen that the diaphragm of this example shows almost no change even after 500 hours, and there is no yellowing unlike in the case of polyurethane resin, and no deterioration of the resin occurs.
上記実施例では、天然繊維について説明したが、化学繊
維またはそれらの複合材を抄造した基材でも応用可能で
ある。また、抄造工程においてに尿素ホルムアルデヒド
樹脂、スチレン系樹脂等の内面サイズ材を叩解バルブに
添加することにより防水性をより向上させることもでき
る。Although natural fibers have been described in the above embodiments, substrates made from chemical fibers or composite materials thereof may also be used. Furthermore, the waterproof property can be further improved by adding an inner sizing material such as urea formaldehyde resin or styrene resin to the beating valve during the papermaking process.
また、本発明は、振動板のみに限らず抄造によって得ら
れるセンターキャップ、エッヂ等の他のスピーカ部材に
おいても上記実施例と同様の効果を奏する。Furthermore, the present invention is not limited to the diaphragm, but also produces effects similar to those of the above embodiments in other speaker members such as center caps and edges obtained by papermaking.
１１列１１
本発明によれば、抄造による基材にアクリル系樹脂を付
着せしめることによって優れた音響的特性を維持しつつ
防水性、耐水性を有しかつ優れた耐候性をも有する振動
板が得られる。11 rows 11 According to the present invention, a diaphragm that maintains excellent acoustic properties, has waterproofness and water resistance, and has excellent weather resistance by adhering an acrylic resin to a paper-made base material is provided. can get.
第１図は本発明のスピーカ用振動板の゛断面図であり、
第２図は第１図に円Ａで示す部分の拡大断面図であり、
第３図は本発明のスピーカ用振動板とポリウレタン系樹
脂で含浸処理した振動板との白色度の経時変化を示すグ
ラフであり、第４図は本発明のスピーカ用振動板とポリ
ウレタン系樹脂で含浸処理した振動板との黄色化度の経
時変化を示すグラフである。
主要部分の符号の説明FIG. 1 is a sectional view of the speaker diaphragm of the present invention.
FIG. 2 is an enlarged sectional view of the part indicated by circle A in FIG.
FIG. 3 is a graph showing the change in whiteness over time between the speaker diaphragm of the present invention and the diaphragm impregnated with polyurethane resin, and FIG. It is a graph showing the change over time in the degree of yellowing of a diaphragm subjected to impregnation treatment. Explanation of symbols of main parts
Claims (2)
してなりかつアクリル系樹脂の溶液を含浸して付着せし
めてなる基材からなることを特徴とするスピーカ用振動
板。(1) A speaker diaphragm comprising a base material made of natural fiber, chemical fiber, or a mixture thereof and impregnated with and adhered to an acrylic resin solution.
であることを特徴とする特許請求の範囲第１項記載のス
ピーカ用振動板。(2) The speaker diaphragm according to claim 1, wherein the acrylic resin is methyl methacrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21679684A JPS6195697A (en) | 1984-10-16 | 1984-10-16 | Diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21679684A JPS6195697A (en) | 1984-10-16 | 1984-10-16 | Diaphragm for speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6195697A true JPS6195697A (en) | 1986-05-14 |
Family
ID=16694008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21679684A Pending JPS6195697A (en) | 1984-10-16 | 1984-10-16 | Diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6195697A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS637000A (en) * | 1986-06-26 | 1988-01-12 | Pioneer Electronic Corp | Constituting member for speaker |
| JPS63261989A (en) * | 1987-04-20 | 1988-10-28 | Matsushita Electric Ind Co Ltd | Speaker |
| JP2007028525A (en) * | 2005-07-21 | 2007-02-01 | Sony Corp | Acoustic diaphragm and acoustic diaphragm manufacturing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5262426A (en) * | 1975-11-18 | 1977-05-23 | Mitsubishi Electric Corp | Diaphragm of speaker |
| JPS53133021A (en) * | 1977-04-26 | 1978-11-20 | Mitsubishi Electric Corp | Diaphragm for speakers |
| JPS5776997A (en) * | 1980-10-30 | 1982-05-14 | Pioneer Electronic Corp | Diaphragm for speaker |
| JPS6041397A (en) * | 1983-08-17 | 1985-03-05 | Sony Corp | Production of acoustic diaphragm |
| JPS60160694A (en) * | 1984-02-01 | 1985-08-22 | 株式会社日立製作所 | Device for removing smear of printed board |
-
1984
- 1984-10-16 JP JP21679684A patent/JPS6195697A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5262426A (en) * | 1975-11-18 | 1977-05-23 | Mitsubishi Electric Corp | Diaphragm of speaker |
| JPS53133021A (en) * | 1977-04-26 | 1978-11-20 | Mitsubishi Electric Corp | Diaphragm for speakers |
| JPS5776997A (en) * | 1980-10-30 | 1982-05-14 | Pioneer Electronic Corp | Diaphragm for speaker |
| JPS6041397A (en) * | 1983-08-17 | 1985-03-05 | Sony Corp | Production of acoustic diaphragm |
| JPS60160694A (en) * | 1984-02-01 | 1985-08-22 | 株式会社日立製作所 | Device for removing smear of printed board |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS637000A (en) * | 1986-06-26 | 1988-01-12 | Pioneer Electronic Corp | Constituting member for speaker |
| JPS63261989A (en) * | 1987-04-20 | 1988-10-28 | Matsushita Electric Ind Co Ltd | Speaker |
| JP2007028525A (en) * | 2005-07-21 | 2007-02-01 | Sony Corp | Acoustic diaphragm and acoustic diaphragm manufacturing method |
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