JPH03277000A - Diaphragm for electroacoustic transducer - Google Patents
Diaphragm for electroacoustic transducerInfo
- Publication number
- JPH03277000A JPH03277000A JP7725990A JP7725990A JPH03277000A JP H03277000 A JPH03277000 A JP H03277000A JP 7725990 A JP7725990 A JP 7725990A JP 7725990 A JP7725990 A JP 7725990A JP H03277000 A JPH03277000 A JP H03277000A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- inorganic
- organic
- organic composite
- base material
- 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
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- 238000005524 ceramic coating Methods 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 10
- 238000003980 solgel method Methods 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 6
- 239000000057 synthetic resin Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 3
- 239000011256 inorganic filler Substances 0.000 claims description 3
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 3
- 239000006262 metallic foam Substances 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 6
- 229920000620 organic polymer Polymers 0.000 abstract description 3
- 239000000178 monomer Substances 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 238000004581 coalescence Methods 0.000 abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000004703 alkoxides Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000000907 Musa textilis Species 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- UGACIEPFGXRWCH-UHFFFAOYSA-N [Si].[Ti] Chemical compound [Si].[Ti] UGACIEPFGXRWCH-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 239000008096 xylene 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、振動板に無機−有機複合体を表面コートまた
は含浸させてなる電気音響変換器用振動板に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a diaphragm for an electroacoustic transducer, which is formed by surface-coating or impregnating the diaphragm with an inorganic-organic composite.
（従来の技術）
従来、電気音響変換器に使用される振動板は、プラスチ
ックフィルム、金属板、織布等を成形加工して作るか、
あるいは天然繊維、合成繊維等に樹脂加工等を施し、そ
れを成形加工したものが多く用いられている。(Prior Art) Conventionally, diaphragms used in electroacoustic transducers have been made by molding plastic films, metal plates, woven fabrics, etc.
Alternatively, natural fibers, synthetic fibers, etc. are often treated with resin and then molded.
しかし、これらは比弾性率が小さいため、良好な周波数
特性を得ることができなかった。However, since these have a small specific elastic modulus, it has not been possible to obtain good frequency characteristics.
これらを改善するために、チタンやアルミナを基材とし
、ダイヤモンド状炭素膜やダイヤモンド膜を基材表面に
形成させた振動板がある。In order to improve these problems, there is a diaphragm that uses titanium or alumina as a base material and has a diamond-like carbon film or a diamond film formed on the surface of the base material.
一方、紙製の振動板において、内部損失が比較的大きく
、高弾性の振動板を得る方法として、実開昭６３−１５
６１９８号に示されるように、紙基材の表面にセラミッ
ク系のコーティング剤を塗布したものもある。On the other hand, as a method for obtaining a paper diaphragm with relatively large internal loss and high elasticity,
As shown in No. 6198, there is also one in which a ceramic coating agent is applied to the surface of a paper base material.
（発明が解決しようとする課Ｉｆり
しかしながら、前者のものでは基材を１００〜９００°
Ｃ程度に加熱してプラズマＣＶＤ法で表面コーティング
しているため、コーテイング膜の厚さは最大でも２μｍ
程度となり、振動板として十分な効果が得られないこと
と、大形基材へのコーティングが困難となり、コストア
ップの要因となる、といった課題がある。(If the problem that the invention seeks to solve) However, in the former case, the base material is
Since the surface is coated using the plasma CVD method after being heated to about C, the thickness of the coating film is at most 2 μm.
However, there are problems such as not being able to obtain a sufficient effect as a diaphragm, and making it difficult to coat large substrates, which increases costs.
また、後者のものは、コーティング剤としてセラミック
を主原料としているが、セラミック物質の相互間はエポ
キシ樹脂等の有機物質で結合されているため、結局、所
望の高弾性を有する振動板を得ることはできず、かつ三
層構造で構成されるので、構造が複雑であるなどの課題
がある。In addition, the latter uses ceramic as the main raw material as a coating agent, but since the ceramic materials are bonded together with an organic material such as epoxy resin, it is difficult to obtain a diaphragm with the desired high elasticity. However, since it is composed of three layers, there are problems such as a complicated structure.
本発明は、上記のことに鑑み提案されたもので、その目
的とするところは、振動板基材に無機−有機複合体を付
着し、所望の剛性などを備え、耐久性があり、製造が容
品で安価な電気音響変換器用振動板を提供することにあ
る。The present invention has been proposed in view of the above, and its purpose is to attach an inorganic-organic composite to a diaphragm base material to provide desired rigidity, durability, and manufacturing ease. An object of the present invention is to provide a compact and inexpensive diaphragm for an electroacoustic transducer.
（課題を解決するための手段）
本発明は、天然繊維等の繊維状物質、合成樹脂発泡体ま
たはフィルム、金属発泡体または金属板、セラミック発
泡体またはセラミック板等で構成された振動板基材に、
ゾル−ゲル法にてセラミック系コーティング剤を塗布し
、振動板基材に対して表面コートまたは含浸させ常温ま
たは加熱乾燥にて無機−有機複合体を付着させて振動板
を構成することにより、上記目的を達成している。(Means for Solving the Problems) The present invention provides a diaphragm base material made of a fibrous material such as natural fiber, a synthetic resin foam or film, a metal foam or metal plate, a ceramic foam or a ceramic plate, etc. To,
By applying a ceramic coating agent using the sol-gel method, surface coating or impregnating the diaphragm base material, and attaching the inorganic-organic composite at room temperature or heat drying, the diaphragm is constructed. has achieved its purpose.
また、セラミック系コーティング剤として無機有機複合
体に金属粉等の無機フィラーを添加して構成したものを
用いても良く、−これによっても上記目的を達成してい
る。Furthermore, a ceramic coating agent made by adding an inorganic filler such as metal powder to an inorganic-organic composite may also be used, and this also achieves the above object.
（作 用）
本発明では上記のように、皮膜形成剤または添加物の結
合剤（バインダー）にはエポキシ樹脂などの有機物を用
いず、皮膜形成剤または結合剤として、ゾル−ゲル法に
よる無機−有機複合体を使用しているため、高弾性で耐
久性のある振動板を安価に得ることができる。(Function) As described above, in the present invention, an organic material such as an epoxy resin is not used as a film-forming agent or a binder for additives, but an inorganic material using a sol-gel method is used as a film-forming agent or binder. Since an organic composite is used, a highly elastic and durable diaphragm can be obtained at low cost.
ゾル−ゲル法による無機−有機複合体は、金属アルコキ
シドと有機モノマーを混合し、それらを反応させて作ら
れる。この無機−有機複合体は重合反応によっ□て無機
の結合を有機の高分子で共有結合によってつないだ形の
無機−有ｍ複合体であるため、無機成分と有機成分の相
違並びにそれらの比率によって無機−有機複合体の物性
は任意にコントロールすることができる。つまり、無機
成分の含有量の多い無機−有機複合体はセラミックの性
質を発現し、有機成分の含有量の多い無機有機複合体は
耐熱性の高い合成樹脂の物性に近くなる。An inorganic-organic composite by the sol-gel method is produced by mixing a metal alkoxide and an organic monomer and reacting them. This inorganic-organic composite is an inorganic-organic composite in which inorganic bonds are linked by covalent bonds with organic polymers through a polymerization reaction, so there are differences between the inorganic and organic components and their ratio. The physical properties of the inorganic-organic composite can be controlled arbitrarily. In other words, an inorganic-organic composite with a high content of inorganic components exhibits the properties of a ceramic, and an inorganic-organic composite with a high content of organic components has physical properties close to that of a synthetic resin with high heat resistance.
また、ゾル−ゲル法を使用しているため、上記セラミッ
ク系コーティング剤は次のような特徴を有している。Further, since the sol-gel method is used, the ceramic coating agent has the following characteristics.
（１） 低温で無機−有機複合体合成が可能である。(1) Inorganic-organic composite synthesis is possible at low temperatures.
（２）溶液から出発しているので、多成分系であっても
、分子、原子レベルで混合ができるため均一性が良い。(2) Since it starts from a solution, even if it is a multi-component system, it can be mixed at the molecular or atomic level, resulting in good uniformity.
（３）新しい組成の物質の合成が容易である。(3) It is easy to synthesize substances with new compositions.
さらに、セラミック系コーティング剤を基材の表面に塗
布する場合、特別な装置を用いなくて良いため、コスト
パフォーマンスに優れ、安価な振動板を実現している。Furthermore, when applying the ceramic coating agent to the surface of the base material, there is no need to use special equipment, making it possible to realize a diaphragm with excellent cost performance and low cost.
（実施例）
以下に本発明の詳細な説明する。ゾル−ゲル法による無
機−有ｌ５ＩＦＡ合体は前記のように容易に種々の物質
を合成することができるが、本実施例では、紙基材に、
シリコン−チタニウム系の無機有機複合体にアルミニウ
ム粉を混入した皮膜を形成した場合のものを一例として
記す。(Example) The present invention will be described in detail below. As mentioned above, various substances can be easily synthesized by combining inorganic-organic IFA using the sol-gel method, but in this example, the paper base material was
An example will be described in which a film is formed by mixing aluminum powder into a silicon-titanium-based inorganic-organic composite.
紙基材は、ＮＢＫＰ８０％、マニラ麻バルブ２０％をビ
ータ−に投入し叩解度が２３”ＳＲになるまで叩解し、
叩解後のバルブを染料とサイズ剤とで染色、サイズ処理
をした。処理されたパルプ材は水道水で希釈し、抄紙機
にて所定の形状に抄紙し、乾燥して作製した。For the paper base material, 80% NBKP and 20% Manila hemp valve were put into a beater and beaten until the degree of beating reached 23"SR.
After beating, the bulbs were dyed and sized using a dye and a sizing agent. The treated pulp material was diluted with tap water, made into a predetermined shape using a paper machine, and dried.
コーティング剤の主成分としては金属酸化物系ポリマー
の一種である金属アルコキシドを用い、この金属アルコ
キシドとしては下記の（１）と（２）を用いた。A metal alkoxide, which is a type of metal oxide polymer, was used as the main component of the coating agent, and the following (1) and (2) were used as the metal alkoxide.
Ｔｉ （ＯＣ４Ｈ９） ４ ・
・ ・ ・ ・（２）（１）と（２）の配合比率はセラ
ミックとしてのＳｉｎｇとＴｉＯ□の重量比でＳｔｏｗ
／Ｔｉ０ｚ＝７４／２６である。Ti (OC4H9) 4 ・
・ ・ ・ ・(2) The blending ratio of (1) and (2) is the weight ratio of Sing and TiO□ as ceramics.
/Ti0z=74/26.
溶剤としては、トルエン、キシレン、ｎ−ブタノールの
混合溶剤を用い上記（１）と（２）の混合物とした。混
合後の固形分は２５％であり、このようにして製造され
たセラマー剤の固形分と同量のアルミニウム粉を添加し
てセラミック系コーティング剤とした。As a solvent, a mixed solvent of toluene, xylene, and n-butanol was used to prepare a mixture of (1) and (2) above. The solid content after mixing was 25%, and the same amount of aluminum powder as the solid content of the ceramer agent thus produced was added to prepare a ceramic coating agent.
セラミック系コーティング剤の反応物質は、反応の過程
でゾルの状態、ゲルの状態を経過して、無機の結合（Ｓ
ｔ−０、Ｔｉ−０）を有機の高分子で共有結合によって
つないだ形の無機−有機複合体となって固化体となる。The reactants of ceramic coating agents pass through the sol state and gel state during the reaction process, forming inorganic bonds (S
t-0, Ti-0) are connected by covalent bonds with organic polymers to form an inorganic-organic composite, which becomes a solidified body.
この無機−有機複合体をこの種技術分野でハイブリッド
またはセラマーとも称している。This inorganic-organic composite is also called a hybrid or a ceramer in this technical field.
塗布方法としては、上記紙基材表面に基材重量に対して
重量比で１５％の上記セラミック系コーティング剤をエ
アースプレーで均一に塗布した。As a coating method, the ceramic coating agent was uniformly applied to the surface of the paper base material by air spray in a weight ratio of 15% based on the weight of the base material.
塗布されたものは室温で５分間放置後、１５０°Ｃで４
０分間強制乾燥した。なお、乾燥手段としては、常温で
約１０日放置したままでも、あるいは強制乾燥でも良く
、これらは製造時間の問題である。The coated material was left at room temperature for 5 minutes, then heated to 150°C for 4 minutes.
Forced drying was performed for 0 minutes. The drying method may be left at room temperature for about 10 days or forced drying, both of which are a matter of manufacturing time.
得られた無機−有機複合体の皮膜は硬度が鉛筆硬度で６
〜７Ｈであり、フレキシブル性のあるセラミック系皮膜
となった。振動板としては高弾性で適度の内部損失を有
し、機械的疲労がなく、耐水性、耐熱性、耐候性が優れ
、かつ電気導電性なく難燃性であワた。The obtained inorganic-organic composite film has a hardness of 6 on the pencil hardness scale.
~7H, resulting in a flexible ceramic film. As a diaphragm, it has high elasticity, moderate internal loss, no mechanical fatigue, excellent water resistance, heat resistance, and weather resistance, and is flame retardant with no electrical conductivity.
紙基材に塗布された振動板の部分断面を第１図に示す、
すなわち、第１図において１は振動板基材、２はその表
面に形成された無機−有機複合体、２ａは振動板基材ｌ
中に含浸された無機−有機複合体である。A partial cross section of the diaphragm coated on the paper base material is shown in Figure 1.
That is, in FIG. 1, 1 is the diaphragm base material, 2 is the inorganic-organic composite formed on its surface, and 2a is the diaphragm base material l.
It is an inorganic-organic composite impregnated inside.
第３図は本実施例で作製した振動板を用いた１６１０径
のスピーカの周波数特性を示し、Ａは本発明のもの、Ｂ
は従来の紙製振動板である。Figure 3 shows the frequency characteristics of a speaker with a diameter of 1610 using the diaphragm manufactured in this example, where A is the one of the present invention and B is the one of the present invention.
is a conventional paper diaphragm.
なお、第１回では暴動仮基材１の一方の面のみに無機−
有機複合体２を形成した例について示したが、両面に形
成しても良いことは勿論である。In addition, in the first trial, inorganic material was applied only to one side of the riot temporary base material 1.
Although an example in which the organic composite 2 is formed has been shown, it goes without saying that it may be formed on both sides.
また、第３図に示すように、振動板基材１の表面に適宜
の配合比の上記コーティング剤をエアースプレーで吹き
付けるなどして無機−有機複合体を含浸させた振動板で
あっても良く、この場合も優れた緒特性を有する振動板
を得ることができる。Alternatively, as shown in FIG. 3, the diaphragm may be impregnated with an inorganic-organic composite by spraying the above-mentioned coating agent at an appropriate mixing ratio onto the surface of the diaphragm base material 1 using air spray. In this case as well, a diaphragm having excellent vibration characteristics can be obtained.
なお、上記実施例では、セラミック系コーティング剤を
無機−有機複合体とアルミニウム粉とで構成した例につ
いて説明したが、アルミニウム粉以外の無機質フィラー
を用いたものであっても良（、この場合、セラミック特
有の脆さがなくなり、耐久性を大巾に向上させることが
できる。In the above example, an example was explained in which the ceramic coating agent was composed of an inorganic-organic composite and aluminum powder, but it is also possible to use an inorganic filler other than aluminum powder (in this case, The brittleness peculiar to ceramics is eliminated, and durability can be greatly improved.
また、振動板基材１としては紙基材を用い、これを所定
の形状に抄紙・乾燥させてなる天然繊維の繊維状物質の
ほかに、例えば合成樹脂発泡体またはフィルム、金属発
泡体または金属板、セラミック発泡体またはセラミック
板等を用い、これにゾル−ゲル法により無機−有機複合
体を形成しても良い。Furthermore, as the diaphragm base material 1, a paper base material is used, and in addition to a natural fiber fibrous material obtained by paper-making and drying this into a predetermined shape, for example, a synthetic resin foam or film, a metal foam, or a metal An inorganic-organic composite may be formed on a plate, ceramic foam, ceramic plate, or the like by a sol-gel method.
（発明の効果）
以上のように、本発明によれば、振動板基材にセラミッ
ク系コーティング剤を塗布または含浸し、常温乾燥また
は加熱乾燥して前記振動板基材に無機−有機複合体を形
成したので、高弾性で耐久性の良い振動板を得ることが
できる。(Effects of the Invention) As described above, according to the present invention, a ceramic coating agent is coated or impregnated on a diaphragm base material, and an inorganic-organic composite is coated on the diaphragm base material by drying at room temperature or heating. As a result, a highly elastic and durable diaphragm can be obtained.
さらに、耐熱性の低い合成樹脂基材であっても、通常の
塗装のように、セラミック系コーティング剤を塗布させ
、乾燥させるといった簡易構成としたから、特別の特殊
な装置が不要で製造が容品となり、かつ量産性に優れ、
安価な振動板を得ることができる等の効果がある。Furthermore, even if the base material is a synthetic resin with low heat resistance, the simple structure of applying a ceramic coating agent and drying it, just like regular painting, eliminates the need for special equipment and makes manufacturing easy. product, and has excellent mass productivity.
There are effects such as being able to obtain an inexpensive diaphragm.
第１図は本発明の振動板の部分断面図、第２図は本発明
と従来例とを比較した周波数特性図、第３図は本発明の
振動板の他の例を示す。
１・・・振動板基材、２・・・無機−有機複合体、２ａ
・・・含浸されたセラマーFIG. 1 is a partial sectional view of the diaphragm of the present invention, FIG. 2 is a frequency characteristic diagram comparing the present invention and a conventional example, and FIG. 3 is a diagram showing another example of the diaphragm of the present invention. 1... Vibration plate base material, 2... Inorganic-organic composite, 2a
...impregnated ceramer
Claims (2)
フィルム、金属発泡体または金属板、セラミック発泡体
またはセラミック板等で構成された振動板基材に、ゾル
−ゲル法にてセラミック系コーティング剤を塗布し、振
動板基材に対して表面コートまたは含浸させ常温または
加熱乾燥にて無機−有機複合体を付着させたことを特徴
とする電気音響変換器用振動板。(1) A ceramic material is applied to a diaphragm base material made of a fibrous material such as natural fibers, a synthetic resin foam or film, a metal foam or metal plate, a ceramic foam or a ceramic plate, etc. using the sol-gel method. A diaphragm for an electroacoustic transducer, characterized in that an inorganic-organic composite is adhered to a diaphragm base material by coating or impregnating the surface of the diaphragm substrate with a coating agent and drying at room temperature or by heating.
合体に金属粉等の無機フィラーを添加して構成したこと
を特徴とする請求項（１）記載の電気音響変換器用振動
板。(2) The diaphragm for an electroacoustic transducer according to claim (1), wherein the ceramic coating agent is formed by adding an inorganic filler such as metal powder to the inorganic-organic composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7725990A JP2886607B2 (en) | 1990-03-27 | 1990-03-27 | Diaphragm for electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7725990A JP2886607B2 (en) | 1990-03-27 | 1990-03-27 | Diaphragm for electroacoustic transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03277000A true JPH03277000A (en) | 1991-12-09 |
| JP2886607B2 JP2886607B2 (en) | 1999-04-26 |
Family
ID=13628856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7725990A Expired - Fee Related JP2886607B2 (en) | 1990-03-27 | 1990-03-27 | Diaphragm for electroacoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886607B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997022566A1 (en) * | 1995-12-15 | 1997-06-26 | Westinghouse Electric Corporation | Oxide ceramic composite for high temperature environment device, method and system |
| JP2016051991A (en) * | 2014-08-29 | 2016-04-11 | パイオニア株式会社 | Diaphragm for speaker, and speaker device |
| WO2017046874A1 (en) * | 2015-09-15 | 2017-03-23 | パイオニア株式会社 | Speaker diaphragm, speaker device and mobile unit |
-
1990
- 1990-03-27 JP JP7725990A patent/JP2886607B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997022566A1 (en) * | 1995-12-15 | 1997-06-26 | Westinghouse Electric Corporation | Oxide ceramic composite for high temperature environment device, method and system |
| JP2016051991A (en) * | 2014-08-29 | 2016-04-11 | パイオニア株式会社 | Diaphragm for speaker, and speaker device |
| WO2017046874A1 (en) * | 2015-09-15 | 2017-03-23 | パイオニア株式会社 | Speaker diaphragm, speaker device and mobile unit |
| JPWO2017046874A1 (en) * | 2015-09-15 | 2018-06-28 | パイオニア株式会社 | Speaker diaphragm, speaker device, and moving body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2886607B2 (en) | 1999-04-26 |
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