JPS61225998A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPS61225998A JPS61225998A JP6834185A JP6834185A JPS61225998A JP S61225998 A JPS61225998 A JP S61225998A JP 6834185 A JP6834185 A JP 6834185A JP 6834185 A JP6834185 A JP 6834185A JP S61225998 A JPS61225998 A JP S61225998A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- speaker
- resistance
- methacrylate resin
- water
- 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丘皇１ 本発明はスピーカ用振動板に関する。[Detailed description of the invention] 1 hill emperor 1 The present invention relates to a diaphragm for a speaker.
背景技術 第１図はコーン型スピーカの一例を示す断面図である。Background technology FIG. 1 is a sectional view showing an example of a cone-shaped speaker.
かかるスピーカにおいては、バックプレート１の中央部
にてポールピース２が載置され、バックプレート１の周
縁部にはマグネット３が載置されている。プレート４は
マグネット３の上に載置されポールピース２との間に磁
気ギャップを形成する。該磁気ギャップにはボイスコイ
ル５を担持したボイスコイルボビン６が撮動自在に挿入
されダンパ７により支持されている。In such a speaker, a pole piece 2 is placed at the center of a back plate 1, and a magnet 3 is placed at the periphery of the back plate 1. The plate 4 is placed on the magnet 3 and forms a magnetic gap with the pole piece 2. A voice coil bobbin 6 carrying a voice coil 5 is inserted into the magnetic gap so as to be movable and supported by a damper 7.
ボイスコイルボビン６は、振動板コーン８の中央孔と結
合し、さらに該中央孔近傍にてセンターキャップ９が冠
着されている。コーン８の開口周縁部はエッチ１０を介
してフレーム１１に支持されている。エッチ１０はさら
にガスケット１２によりフレーム１１へ固着せしめられ
ている。なおボイスコイルのリードは錦糸線１３を介し
てフレーム１１の側面に設けられた端子１４に接続され
ている。The voice coil bobbin 6 is connected to a center hole of a diaphragm cone 8, and a center cap 9 is attached near the center hole. The opening periphery of the cone 8 is supported by a frame 11 via an etch 10. The etch 10 is further fixed to the frame 11 by a gasket 12. Note that the lead of the voice coil is connected to a terminal 14 provided on the side surface of the frame 11 via a tinsel wire 13.
一般にスピーカ用振動板に使用されている原料ｍ維は、
いわゆる木材バルブが主で、この木材バルブにマニラ麻
、みつまた等の靭革繊維または合成繊維を混合抄造した
ものが多く用いられている。The raw material m-fiber generally used for speaker diaphragms is:
So-called wood valves are the main type of valves, and many are made by mixing these wood valves with tough leather fibers such as manila hemp, mitsumata, or synthetic fibers.
スピーカが忠実に入力信号を音響出力に変換するために
は、その振動板が理想的にピストン運動をする必要があ
る。このためには振動板が剛体でなければならない。ま
た、振動板は電気音響変換効率を高めるためにヤング率
が大きく、内部損失が適度であることが望まれている。In order for a speaker to faithfully convert an input signal into an acoustic output, its diaphragm must ideally perform piston motion. For this purpose, the diaphragm must be a rigid body. Furthermore, it is desired that the diaphragm has a large Young's modulus and moderate internal loss in order to increase the electroacoustic conversion efficiency.
近年、スピーカの用途が大幅に拡大されるに伴って種々
の性能を持つスピーカ用振動板が求められている。特に
車輌関係に搭載するスピーカの振動板に関しては、撥水
性、耐水性、耐油性及び耐熱性を有するスピーカ用振動
板が市場で強く要望されている。In recent years, as the uses of speakers have expanded significantly, speaker diaphragms with various performances have been required. In particular, regarding diaphragms for speakers mounted on vehicles, there is a strong demand in the market for speaker diaphragms that are water repellent, water resistant, oil resistant, and heat resistant.
スピーカ用振動板の主材は天然バルブであるためにスピ
ーカ用振動板は、天然バルブ繊維の親水性により１１１
間の間隙に毛管作用が働き水や油を吸収する性質を有し
ている。従ってスピーカ用振動板は用途に応じて内面サ
イジングを行い撥水性耐水性を保持せしめている。内面
サイジングは、振動板基材の抄造時にサイジング剤とし
て尿素樹脂、メラニン樹脂、０ジンサイズ等の溶液をバ
ルブ懸濁液に添加して行われる。更にまた、撥水性及び
耐水性を向上させるために抄造後の振動板基材にも樹脂
含浸処理を施している。Since the main material of the speaker diaphragm is a natural valve, the speaker diaphragm has a 111%
Capillary action works in the gaps between them and has the property of absorbing water and oil. Therefore, the inner surface of the speaker diaphragm is sized according to the intended use to maintain water repellency and water resistance. The inner surface sizing is carried out by adding a solution of urea resin, melanin resin, zero gin size, etc. as a sizing agent to the valve suspension during paper making of the diaphragm base material. Furthermore, in order to improve water repellency and water resistance, the diaphragm base material after papermaking is also subjected to resin impregnation treatment.
しかしながら通常の樹脂組成、例えば芳香族系溶剤６６
．２％、酢酸エステル類１７．０％、ケトン類７．０％
、グリコール（高沸点）類４．０％、硝化綿３．８％、
可塑剤（ＤＯＰ）１．０％、及び樹脂１，０％からなる
樹脂溶液による含浸処理では充分なる耐水性及び耐油性
を有するスピーカ用振動板を得ることができなかった。However, the usual resin composition, e.g. aromatic solvent 66
．． 2%, acetate esters 17.0%, ketones 7.0%
, glycols (high boiling point) 4.0%, nitrified cotton 3.8%,
Impregnation treatment with a resin solution consisting of 1.0% plasticizer (DOP) and 1.0% resin could not provide a speaker diaphragm with sufficient water resistance and oil resistance.
更にまた、耐水性及び耐油性を有するスピーカ用振動板
としてポリプロピレン等の熱可塑性樹脂シートを成形し
てなる振動板が一部採用されている。しかしながら、該
樹脂シート振動板は、熱に弱い、振動板の重量が増加し
てスピーカの能率が低下する、形成材料の経時変化に伴
い耐候性が劣化する等の傾向がある。したがって、耐水
性、耐油性、耐熱性及び耐候性のすべてを同時に満足す
るスピーカ用振動板は得られていない。Furthermore, as a speaker diaphragm having water resistance and oil resistance, a diaphragm formed by molding a thermoplastic resin sheet such as polypropylene is partially used. However, the resin sheet diaphragm tends to be susceptible to heat, increase the weight of the diaphragm and reduce the efficiency of the speaker, and deteriorate weather resistance as the material used to form it changes over time. Therefore, a speaker diaphragm that simultaneously satisfies all of water resistance, oil resistance, heat resistance, and weather resistance has not been obtained.
１亙立員１
本発明の目的は、耐水性、耐油性及び耐候性を有したス
ピーカ用振動板を提供することである。An object of the present invention is to provide a speaker diaphragm having water resistance, oil resistance, and weather resistance.
本発明のスピーカ用振動板は、天然ＩＪＡＨ及び／又は
化学繊維を主原料として所定の形状に抄紙した振動板基
材にメチルメタアクリレート樹脂溶液を含浸し乾燥せし
めた後に弗素樹脂溶液を振動板基材の表面に付着して乾
燥せしめてなる弗素樹脂膜によって振動板基材の表面を
被覆してなることを特徴とする。The speaker diaphragm of the present invention is produced by impregnating a diaphragm base material made of natural IJAH and/or chemical fibers into paper into a predetermined shape with a methyl methacrylate resin solution and drying the diaphragm base material, and then applying a fluororesin solution to the diaphragm base material. It is characterized in that the surface of the diaphragm base material is coated with a fluororesin film that is adhered to the surface of the material and dried.
実 施 例
以下に、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。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings and the table below.
第２図に本実施例のスピーカ用振動板を得る製造工程の
フローチャートを示す。先ず、バルブ叩解工程Ｓ１とし
て、ＮＢＫＰバルブ１００％（針葉樹晒しクラフトバル
ブ）を１５分間程度Ｍ５潤を行い、所定の叩解機に投入
してバルブ濃度３．０％程度でバルブの物性を損わない
ように叩解を行い、ショツパー型叩解度測定機で所定の
叩解度２０度ＳＲの紙料調整を行い染色を施しバルブを
調整する。FIG. 2 shows a flowchart of the manufacturing process for obtaining the speaker diaphragm of this example. First, as the valve beating step S1, 100% NBKP valve (softwood bleached kraft valve) is subjected to M5 moisture for about 15 minutes, and then put into a designated beating machine to maintain a valve concentration of about 3.0% without damaging the physical properties of the valve. The paper material is beaten in the following manner, and the paper stock is adjusted to a predetermined freeness of 20 degrees SR using a Schopper type freeness meter, dyed, and the valve is adjusted.
次に、抄紙工程Ｓ２として、調製された紙料は抄紙濃度
１．０％程度のバルブ液に調整し、予め円錐状に成形し
た抄造網で所望の形状の振動板基板の抄紙を行う。Next, in the papermaking step S2, the prepared paper stock is adjusted to a valve liquid having a papermaking concentration of about 1.0%, and a diaphragm substrate of a desired shape is made using a papermaking net previously formed into a conical shape.
次に、乾燥工程Ｓ３として、抄紙された該基材を所定の
金型を用い３ｋＱ／Ｃｍ２プレス圧力で金型温度１８０
〜２００℃で加熱加圧乾燥する。Next, as a drying step S3, the paper-made base material is heated to a mold temperature of 180 at a press pressure of 3 kQ/Cm2 using a predetermined mold.
Dry under heat and pressure at ~200°C.
そして、熱風発生機を用い１５０℃程度の熱風温度で乾
燥して振動板基材を得る。Then, it is dried using a hot air generator at a hot air temperature of about 150° C. to obtain a diaphragm base material.
次に、含浸工程Ｓ４として、第１表に示す成分のメチル
メタアクリレート樹脂溶液を予め調製する。Next, as an impregnation step S4, a methyl methacrylate resin solution containing the components shown in Table 1 is prepared in advance.
第１表
調製されたメチルメタアクリレート樹脂溶液をニトロン
シンナーで稀釈して１２．５％溶液とし、該稀釈溶液に
作成された振動板基材を約５分程度浸し含浸処理を施す
。The methyl methacrylate resin solution prepared in Table 1 is diluted with nitron thinner to make a 12.5% solution, and the diaphragm base material prepared is immersed in the diluted solution for about 5 minutes to perform an impregnation treatment.
次に、乾燥工程Ｓ５として、乾燥機中にて９０〜１００
℃程度の熱風により１００分程乾燥を行い、振動板基材
中のｓｓｉにメチルメタアクリレート樹脂を付着せしめ
る。Next, as a drying step S5, the
Drying is performed for about 100 minutes using hot air at a temperature of about 0.degree. C. to adhere methyl methacrylate resin to the ssi in the diaphragm base material.
次に、浸漬工程Ｓ６として、弗素系樹脂溶液すなわち弗
素系樹脂１５％±１％に１−１−１−トリクロルエタン
で溶解したものを予め調製し、該弗素系樹脂溶液に含浸
処理を経た振動板基材を３分程度浸漬する。振動板基材
の表面に、弗素系樹脂溶液を付着せしめる。Next, as an immersion step S6, a fluorine-based resin solution, that is, a solution of 15% ± 1% fluorine-based resin dissolved in 1-1-1-trichloroethane, is prepared in advance, and the fluorine-based resin solution is subjected to an impregnation treatment. Soak the board base material for about 3 minutes. A fluorine-based resin solution is applied to the surface of the diaphragm base material.
次に、乾燥工程Ｓ７として、乾燥機中にて９０〜１００
℃程度の熱風により１００分程乾燥を行い、振動板基材
の表面を弗素樹脂膜により被覆する。Next, as a drying step S7, the
Drying is performed for about 100 minutes using hot air at a temperature of about 0.degree. C., and the surface of the diaphragm base material is coated with a fluororesin film.
最後に、切断成形工程Ｓ８として、振動板基材の所定の
内外径を切断成形してスピーカ用振動板が得られる。Finally, in a cutting and forming step S8, a speaker diaphragm is obtained by cutting and forming a predetermined inner and outer diameter of the diaphragm base material.
第３図は本発明のスピーカ用振動板の部分拡大断面図で
あり、パルプ繊維１５にメチルメタアクリレート樹脂１
６が付着しておりかつ弗素系樹脂ＷＡ１７がパルプＩＩ
維１５からなる撮動板Ｍ材表面を覆っていることを示し
ている。FIG. 3 is a partially enlarged sectional view of the speaker diaphragm of the present invention, in which methyl methacrylate resin 1 is added to pulp fiber 15.
6 is attached and fluorine resin WA17 is pulp II.
It is shown that the surface of the imaging plate M material made of fiber 15 is covered.
第４図は本発明のスピーカ用振動板を用いたスピーカの
音圧周波数特性（曲線Ａ）と従来のもの（曲線Ｂ）とを
示すグラフである。両者を比較して見てもとんと特性の
違いはないことが分る。FIG. 4 is a graph showing the sound pressure frequency characteristics of a speaker using the speaker diaphragm of the present invention (curve A) and the conventional one (curve B). Comparing the two, it can be seen that there is no difference in characteristics.
第２表において得られた本実施例のスピーカ用振動板と
従来のものとの各々の物性を示す。該物性値は、両振動
板から試料を１．ｏＣｍＸ４．５ｃｍ切取り空温２０℃
湿度６０％の環境で振動リード法によりヤング率及び内
部損失を測定した結果である。両者を比較した場合、本
実施例のスピーカ用振動板の物性値が従来のものよりヤ
ング率で２２％、ｆ］＝フ′万一で１０．４％、内部損
失で１６゜９％程度増加しており顕著な物性の向上を示
している。Table 2 shows the physical properties of the speaker diaphragm of this example and the conventional one. The physical property values are as follows: 1. oCmX4.5cm Cutting air temperature 20℃
These are the results of measuring Young's modulus and internal loss using the vibration reed method in an environment with 60% humidity. When comparing the two, the physical properties of the speaker diaphragm of this example are 22% higher than the conventional one in terms of Young's modulus, 10.4% higher in f] = 10.4% higher than the conventional one, and 16°9% higher in internal loss. This shows a remarkable improvement in physical properties.
第２表
第３表は、本発明の振動板の各種試験結果を示し、本発
明の振動板が各試験に適合する条件に耐え得ることを示
している。Tables 2 and 3 show the results of various tests on the diaphragm of the present invention, and show that the diaphragm of the present invention can withstand the conditions that meet each test.
第３表
以上のように本発明によれば、メタアクリレート樹脂含
浸処理及び弗素樹脂浸漬処理による目止め被膜効果によ
り振動板基材の表面を弗素樹脂膜にて強固に被覆してい
るので、車両のドアマウント等の屋外にて使用した時の
降雨、洗車時の水、洗剤水の浸透を防止し油やグリース
等の油脂の浸透をも防止しするので振動板のヤング率、
内部損失などに大きい変化をしめずことない耐油性耐水
性の振動板が得られる。また溶剤の浸透による強度の低
下を起こさず、かつ１５０〜２００℃ノｍ度に置いても
周波数特性や低域のダンピング特性等の音響特性が変化
しない耐溶剤性耐熱性の振動板が得られる。更にまた湿
度による伸縮変形もなく湿潤強度が高いので再び尿素樹
脂メラニン樹脂等のＦＪ潤強度の向Ｆの耐湿処理を必要
としない振動板が得られる。As shown in Table 3 and above, according to the present invention, the surface of the diaphragm base material is firmly coated with a fluororesin film due to the sealing film effect of the methacrylate resin impregnation treatment and the fluororesin dipping treatment. When used outdoors, such as on door mounts, it prevents the penetration of rain, water from car washes, and detergent water, and also prevents the penetration of oil, grease, and other oils, reducing the Young's modulus of the diaphragm.
It is possible to obtain an oil- and water-resistant diaphragm that does not exhibit large changes in internal loss. In addition, a solvent-resistant and heat-resistant diaphragm is obtained that does not cause a decrease in strength due to penetration of solvents, and whose acoustic characteristics such as frequency characteristics and low-frequency damping characteristics do not change even when placed at temperatures of 150 to 200 degrees Celsius. . Furthermore, since there is no expansion/contraction deformation due to humidity and the wet strength is high, a diaphragm that does not require moisture-resistant treatment of FJ wet strength such as urea resin and melanin resin can be obtained.
第１図はコーン型スピーカの断面図であり、第２図は本
発明のスピーカ用撮動板を製造する処理工程を示すフロ
ーチャートであり、第３図は本発明のスピーカ用振動板
の部分拡大断面図であり、第４図は本発明のスピーカ用
撮動板及び従来のものを各々用いたスピーカの音圧周波
数特性を示すグラフである。
主要部分の符号の説明
１・・・・・・バックプレート
２・・・・・・ポールピース
３・・・・・・マグネット
４・・・・・・プレート
５・・・・・・ボイスコイル
６・・・・・・ボイスコイルボビン
７・・・・・・ダンパ
８・・・・・・コーン
９・・・・・・センターキャップ
１０・・・・・・エッヂ
１２・・・・・・ガスケット
１３・・・・・・錦糸線
１４・・・・・・端子
１５・・・・・・パルプ繊維
１６・・・・・・メチルメタアクリレ−“ト樹脂１７・
・・・・・弗素系樹脂膜FIG. 1 is a cross-sectional view of a cone-shaped speaker, FIG. 2 is a flowchart showing the processing steps for manufacturing the speaker imaging plate of the present invention, and FIG. 3 is a partial enlargement of the speaker diaphragm of the present invention. FIG. 4 is a cross-sectional view, and FIG. 4 is a graph showing the sound pressure frequency characteristics of speakers using the speaker imaging plate of the present invention and the conventional one. Explanation of symbols for main parts 1... Back plate 2... Pole piece 3... Magnet 4... Plate 5... Voice coil 6 ...Voice coil bobbin 7 ...Damper 8 ...Cone 9 ...Center cap 10 ...Edge 12 ...Gasket 13 ..... Tinsel wire 14 ..... Terminal 15 ..... Pulp fiber 16 ..... Methyl methacrylate resin 17.
...Fluorine resin film
Claims (1)
に抄紙した振動板基材にメチルメタアクリレート樹脂溶
液を含浸し乾燥せしめた後に弗素樹脂膜によって前記振
動板基材の表面を被覆せしめてなることを特徴とするス
ピーカ用振動板。A diaphragm base material made from natural fibers and/or chemical fibers as main raw materials into a predetermined shape is impregnated with a methyl methacrylate resin solution, dried, and then the surface of the diaphragm base material is covered with a fluororesin film. A speaker diaphragm characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6834185A JPS61225998A (en) | 1985-03-29 | 1985-03-29 | Diaphragm for speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6834185A JPS61225998A (en) | 1985-03-29 | 1985-03-29 | Diaphragm for speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61225998A true JPS61225998A (en) | 1986-10-07 |
Family
ID=13371037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6834185A Pending JPS61225998A (en) | 1985-03-29 | 1985-03-29 | Diaphragm for speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61225998A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5262426A (en) * | 1975-11-18 | 1977-05-23 | Mitsubishi Electric Corp | Diaphragm of speaker |
| JPS5728119A (en) * | 1980-06-11 | 1982-02-15 | Dow Chemical Co | Acid-functional novel polymer |
| JPS596558A (en) * | 1982-07-02 | 1984-01-13 | Nec Corp | Integrated circuit |
-
1985
- 1985-03-29 JP JP6834185A patent/JPS61225998A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5262426A (en) * | 1975-11-18 | 1977-05-23 | Mitsubishi Electric Corp | Diaphragm of speaker |
| JPS5728119A (en) * | 1980-06-11 | 1982-02-15 | Dow Chemical Co | Acid-functional novel polymer |
| JPS596558A (en) * | 1982-07-02 | 1984-01-13 | Nec Corp | Integrated circuit |
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