JPH01144894A - Diaphragm for speaker - Google Patents
Diaphragm for speakerInfo
- Publication number
- JPH01144894A JPH01144894A JP30142187A JP30142187A JPH01144894A JP H01144894 A JPH01144894 A JP H01144894A JP 30142187 A JP30142187 A JP 30142187A JP 30142187 A JP30142187 A JP 30142187A JP H01144894 A JPH01144894 A JP H01144894A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- elastic modulus
- strength
- specific
- tensile
- 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
- 239000004744 fabric Substances 0.000 claims abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 11
- 239000012210 heat-resistant fiber Substances 0.000 claims 1
- 239000002990 reinforced plastic Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 239000004698 Polyethylene Substances 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 7
- -1 polyethylene Polymers 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 abstract description 3
- 239000012784 inorganic fiber Substances 0.000 abstract description 3
- 239000004753 textile Substances 0.000 abstract 2
- 238000009940 knitting Methods 0.000 abstract 1
- 239000004745 nonwoven fabric Substances 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 239000002759 woven fabric Substances 0.000 description 4
- 239000002356 single layer Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000049 pigment 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
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
「発明の目的」
（産業上の利用分野）
本発明はスピーカ用振動板に係り、特に高強度命高弾性
率繊維からなる布帛で樹脂を強化した構造のスピーカ用
振動板に関するものである。Detailed Description of the Invention Object of the Invention (Industrial Application Field) The present invention relates to a speaker diaphragm, and more particularly to a speaker diaphragm having a structure in which a resin is reinforced with a fabric made of high-strength, high-modulus fibers. It's about the board.
（従来の技術と問題点）
従来より振動板の比弾性率を高めるために炭素繊維等の
無機繊維布で樹脂を強化した構造のスピーカ用振動板が
あるが、この種のスピーカ用振動板は概して比重が重く
、軽量化できない、という欠点があり、また、比弾性率
は増大するが、内部損失が少ないために高帯域での材料
鳴きが生じ、る欠点があった。(Conventional technology and problems) Conventionally, there are speaker diaphragms that have a structure in which resin is reinforced with inorganic fiber cloth such as carbon fiber in order to increase the specific elastic modulus of the diaphragm. Generally, they have the disadvantage that they have a high specific gravity and cannot be reduced in weight.Also, although the specific modulus of elasticity increases, the internal loss is small, resulting in material squeal in a high frequency band.
本発明の目的は上記した従来の欠点を解消し、高強度で
高弾性率を備え、軽量化を図ることができると共に適度
な内部損失を有していて材料鳴きが生じることのないス
ピーカ用振動板を提供することにある。The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, and to provide a vibrator for a speaker that has high strength, high elastic modulus, is lightweight, has an appropriate internal loss, and does not cause material squeal. The purpose is to provide a board.
「発明の構成」
（問題点を解決するための手段）
しかして上記問題点を解決すべく、各種素材による音響
振動板としての物性を種々実験した結果、引張強度２０
ｇ／ｄ以上、引張弾性率５００ｇ／ｄ以上（Ｉｇ／ｄ＝
９．０ Ｋｇ／ ｍｍ″）の高強度φ高弾性率ポリエ
チレン繊維２ａ 、 ２ｂよりなる布帛と樹脂３とによ
って成形したスピーカ用振動板は、特性的に。"Structure of the Invention" (Means for Solving the Problems) However, in order to solve the above problems, as a result of various experiments on the physical properties of acoustic diaphragms made of various materials, the tensile strength of 20
g/d or more, tensile modulus 500 g/d or more (Ig/d=
A speaker diaphragm molded from resin 3 and a fabric made of high-strength φ high-modulus polyethylene fibers 2a and 2b (9.0 Kg/mm'') has the following characteristics.
また、量産性及び経済性においても最も有利であること
を見出し１本発明をするに至った。Furthermore, they found that it is most advantageous in terms of mass production and economy, and have come up with the present invention.
（作用）
本発明に用いる高強度・高弾性率ポリエチレン繊維は、
少なくとも２０ｇ／ｄ 、好ましくは３０ｇ／ｄ以上の
引張強度と少なくとも５００ｇ／ｄ、好ましくは１００
０ｇ／ｄ 、より好ましくは１３００ｇ／ｄ以上の引張
弾性率を有するものが推奨される。(Function) The high-strength, high-modulus polyethylene fiber used in the present invention is
A tensile strength of at least 20 g/d, preferably 30 g/d or more and a tensile strength of at least 500 g/d, preferably 100 g/d.
Those having a tensile modulus of 0 g/d, more preferably 1300 g/d or more are recommended.
本発明に用いる高強度・高弾性率ポリエチレン繊維の単
繊維デニールについては特に限定はないが、好ましくは
０．２〜２０ ｄ、更に好ましくは０．５〜１０ ｄと
するのが良い。The single fiber denier of the high-strength, high-modulus polyethylene fiber used in the present invention is not particularly limited, but it is preferably 0.2 to 20 d, more preferably 0.5 to 10 d.
本発明に用いる布帛は、不織布、ニー／ ト、織物いず
れでもよいが、得られた振動板の比弾性率及び内部損失
のバランスからすれば織物が好ましい、また、織物組織
については特に限定はしないが、外観装飾性からすると
平織構造が良い。The fabric used in the present invention may be nonwoven, neat, or woven, but woven is preferable in terms of the specific elastic modulus and internal loss balance of the resulting diaphragm, and there are no particular limitations on the woven structure. However, from the standpoint of decorative appearance, a plain weave structure is better.
更に、高強度・高弾性率ポリエチレン繊維のトータルデ
ニールは３００ ｄ−１８００ｄの範囲が好ましいが、
得られた振動板の曲げ剛性からすると８００ｄ〜１８０
０ｄ ｄがより好ましい。Further, the total denier of the high-strength/high-modulus polyethylene fiber is preferably in the range of 300 d to 1800 d,
Judging from the bending rigidity of the obtained diaphragm, it is 800d~180
0d d is more preferred.
このような布帛で強化された樹脂で成形される振動板の
構造は、単層又は積層いずれの構造でもよいが、曲げ剛
性を考慮して、細デニール使いの布帛は少なくとも２プ
ライの積層構造にし、太デニール使いの布帛は単層構造
にするなど、使い分けるのが望ましい。The structure of a diaphragm molded from resin reinforced with such fabric may be either a single layer or a laminated structure, but in consideration of bending rigidity, the fine denier fabric should have a laminated structure of at least two plies. It is desirable to use different types of fabrics, such as using thick denier fabrics with a single layer structure.
上記したように振動板は、引張強度２０ｇ／ｄ以上、引
張弾性率５００ｇ／ｄ以上の高強度高弾性率ポリエチレ
ン繊維の布と樹脂とで成形されているから、比強度、比
弾性率に優れているのは勿論、後に説明するように、比
重が小さいために軽量化され、また、従来の無機繊維強
化プラスチックによる振動板に比して内部損失が大きく
、高域での材料鳴きが抑えられる。As mentioned above, the diaphragm is molded from resin and high-strength, high-modulus polyethylene fiber cloth with a tensile strength of 20 g/d or more and a tensile modulus of 500 g/d or more, so it has excellent specific strength and specific modulus. Of course, as will be explained later, it is lighter due to its lower specific gravity, and has a higher internal loss than conventional inorganic fiber-reinforced plastic diaphragms, suppressing material squeal at high frequencies. .
（実施例）
本発明に係るスピーカ用振動板の実施例を第１図乃至第
３図に基づいて説明するが、第１図は一部を断面した斜
視図、第２図は他の構成例を示す断面図、第３図は周波
数比較特性図である。(Example) An example of the speaker diaphragm according to the present invention will be described based on FIGS. 1 to 3. FIG. 1 is a partially sectional perspective view, and FIG. 2 is an example of another configuration. FIG. 3 is a frequency comparison characteristic diagram.
第１図において、１はコーン型に成形された振動板金体
を指し、引張強度２０ｇ／ｄ以上、引張弾性率５００ｇ
／ｄ以上（Ｉｇ／ｄ＝ ９．０ Ｋｇ／ ｍｍ″）の高
強度・高弾性率ポリエチレン繊維２ａ 、 ２ｂよりな
る織物２と樹脂３とによって単層又は積層構造で構成さ
れている。In Fig. 1, 1 refers to a cone-shaped diaphragm metal body, which has a tensile strength of 20 g/d or more and a tensile modulus of 500 g.
/d or more (Ig/d=9.0 Kg/mm''), the fabric 2 is made of high-strength, high-modulus polyethylene fibers 2a and 2b, and the resin 3 has a single-layer or laminated structure.
上記した構成を具体例に従って説明する。The above configuration will be explained according to a specific example.
実施例１
上記織物２としては、引張強度３３ｇ／ｄ 、引張弾性
率１２７０８／ｄの高強度高弾性率ポリエチレン繊維（
東洋紡績■商品名：ダイニーマ５Ｋ−８０） ８００デ
ニール／７５０フイラメントの原糸で平織された織布（
ｔｉ＆度；緯、経１８本／インチ）であり、この織布に
ビニルエステル樹脂をプリプレグ加工したもの（以下ｒ
ＰＥプリプレグ布」という）を２枚積層し、これを所定
の硬化条件（１２０℃、５分、面圧５Ｋｇ／ ｃｒｎ’
）で加熱加圧成形することにより、８インチ用のコーン
型振動板ｌを得た。Example 1 The fabric 2 was made of high-strength, high-modulus polyethylene fiber (with a tensile strength of 33 g/d and a tensile modulus of 12708/d).
Toyobo ■Product name: Dyneema 5K-80) Woven fabric plain woven with 800 denier/750 filament yarn (
ti °ree; latitude and warp 18 pieces/inch), and this woven fabric is prepreg-processed with vinyl ester resin (hereinafter referred to as r
Two sheets of PE prepreg cloth (referred to as "PE prepreg cloth") were laminated and cured under specified curing conditions (120°C, 5 minutes, surface pressure 5Kg/crn'
) to obtain an 8-inch cone-shaped diaphragm 1.
このときのＦＲＰとしての物性は、音速２８００厘／ｓ
ｅｃ、、内部損失ｊａｎ６０．０３であり、比重は０．
９と小さい値を示した。At this time, the physical properties of FRP are as follows:
ec, internal loss JAN60.03, specific gravity 0.
It showed a small value of 9.
この音速２８００ｍ／ｓｅａ、は、従来の炭素繊維平織
ＦＲＰ振動板の音速３５００ｍ／ｓｅｃ、に比してやや
小さいが、一般に音響用振動板としては、要求される各
物性がバランスの良い値であることが必要であり、音速
×内部損失の見方からすると１本発明の上記実施例で得
られた振動板ｌは、 ２８００Ｉｌ／ｓａｃ、Ｘ０００
３であり、従来の炭素繊維平織ＦＲＰ振動板の音速３５
００ｍ／ｓｅｃ、Ｘ Ｏ，Ｑｌよりも大きく、音響用振
動板としては優れた素材であることが判明する。This sound speed of 2,800 m/sea is slightly smaller than the sound speed of 3,500 m/sec of a conventional carbon fiber plain weave FRP diaphragm, but generally speaking, as an acoustic diaphragm, each required physical property must have a well-balanced value. From the perspective of sound velocity x internal loss, the diaphragm l obtained in the above embodiment of the present invention is: 2800 Il/sac, X000
3, and the sound velocity of the conventional carbon fiber plain weave FRP diaphragm is 35
00 m/sec, X O, Ql, and is found to be an excellent material as an acoustic diaphragm.
実施例２
織布は実施例１のものと同じものを使用し、樹脂を不飽
和ポリエステル樹脂（１２０℃、５分硬化）として実施
例と同様の成形法で８インチ用コーン型振動板を得た。Example 2 An 8-inch cone-shaped diaphragm was obtained using the same woven fabric as in Example 1 and using the same molding method as in Example, using unsaturated polyester resin (cured at 120°C for 5 minutes) as the resin. Ta.
このときのＦＲＰとしての物性は、音速として２８００
ｍ ／ ｓｅｃ、であって変化はなかったが、内部損失
がｊａｎ６０．０７〜０．０８であって、実施例１の倍
以下の値を示した。また、比重は１．０であった。The physical properties of FRP at this time are 2800 as the speed of sound.
m/sec, which did not change, but the internal loss was 60.07 to 0.08, which was less than twice that of Example 1. Further, the specific gravity was 1.0.
上記実施例１及び２の結果から、この高強力高弾性率ポ
リエチレン繊維は、内部損失が高くなるような樹脂との
コンポジットであっても、音速は蕃ちないことが判明す
る。From the results of Examples 1 and 2 above, it is clear that this high-strength, high-modulus polyethylene fiber does not reduce the sound velocity even if it is composited with a resin that increases internal loss.
実施例３
実施例１において、使用される原糸が引張強度３１ｇ／
ｄ 、引張弾性率１１５０ｇ／ｄの高強度・高弾性率ポ
リエチレンｔａＨ［１００デニール／２４０フイラメン
トで、緯１６木／インチ、経１８木／インチの平織織布
としたＰＥプリプレグ布（重量２０５ｇ／ｒｎ’）
１枚で８インチ用コーン型振動板を成形した。この場合
のコーン型振動板の重量は約５．５ｇであり、この振動
板を８インチのスピーカユニットとして組み込んだ。Example 3 In Example 1, the yarn used had a tensile strength of 31 g/
d, PE prepreg cloth made of high strength and high elastic modulus polyethylene TAH [100 denier/240 filament, plain weave woven fabric with a weft of 16 wood/inch and a warp of 18 wood/inch with a tensile modulus of 1150 g/d (weight 205 g/rn ')
An 8-inch cone-shaped diaphragm was molded from one piece. The weight of the cone-shaped diaphragm in this case was approximately 5.5 g, and this diaphragm was incorporated into an 8-inch speaker unit.
このスピーカユニットの周波数特性を測定するに際し゛
、従来の炭素繊維平織ＦＲＰによる振動板と比較するた
めに、 １０００フイラメント炭素繊維の経緯共に１８
本／インチによる平織織布のプリプレグ布（以下ｒＣＦ
プリプレグ布」という）を使用し、実施例１と同一条件
で８インチ用のコーン型振動板を得、これを８インチの
スピーカユニー／ ）として組み込んだ、なお、ＯＦプ
リプレグ布の樹脂は実施例１のものと同一であり、この
ＣＦプリプレグ布の重量は２００ｇ、振動板重量は約５
．５ｇであった。When measuring the frequency characteristics of this speaker unit, in order to compare it with a diaphragm made of conventional carbon fiber plain weave FRP, we used 18
Plain woven prepreg fabric (hereinafter referred to as rCF) per inch
An 8-inch cone-shaped diaphragm was obtained under the same conditions as in Example 1 using an 8-inch cone-shaped diaphragm, and this was incorporated into an 8-inch speaker unit. The weight of this CF prepreg cloth is 200g, and the weight of the diaphragm is approximately 5.
．． It was 5g.
第３図は周波数比較特性図であるが、図において、Ａは
本発明における実施例３のスピーカの周波数特性、Ｂは
上記のようにして得られた従来の炭素繊維平織ＦＲＰに
よる振動板を使用したスピーカの周波数特性である。FIG. 3 is a frequency comparison characteristic diagram. In the figure, A is the frequency characteristic of the speaker of Example 3 of the present invention, and B is the frequency characteristic of the conventional carbon fiber plain weave FRP diaphragm obtained as described above. This is the frequency characteristic of the speaker.
この特性図からも明らかなようにＡはＢに比して高域に
おいて著しく平坦化されている。As is clear from this characteristic diagram, A is significantly flattened in the high range compared to B.
実施例４
実施例１において、使用される原糸として、強度３００
Ｋｇ／ｍｒｎ’、弾性率１３０００Ｋｇ ／ ｍｒｒＩ
′のものを用い、プリプレグ加工された布状体１枚で実
施例１と同様にして、４インチ用のスコーカ用コーン型
振動板を得た。Example 4 In Example 1, the yarn used had a strength of 300
Kg/mrn', elastic modulus 13000Kg/mrrI
A cone-shaped diaphragm for a 4-inch squawker was obtained in the same manner as in Example 1 using one sheet of prepreg-processed cloth.
この振動板をスピーカユニットに組み込んで緒特性を測
定したところ、振動板の比重が０．９と軽量であるため
、従来の炭素繊維平織ＦＲＰによるスコーカ用振動板を
使用したものよりも能率が向上し、周波数特性は高域に
おいてなめらかな特性が得られた。When this diaphragm was incorporated into a speaker unit and its characteristics were measured, it was found that the specific gravity of the diaphragm is 0.9, which is lightweight, so it is more efficient than a squawker diaphragm made from conventional carbon fiber plain weave FRP. However, smooth frequency characteristics were obtained in the high range.
上記実施例１乃至４で使用された糸は１強度、弾性率共
にまだ利用率が低く１強度ｌＯ％１弾性率５０％の利用
率であるが、今後の技術においてポリエチレンの理論値
に近づいた場合、ポリエチレンの理想弾性率は２４１３
７５Ｋｇ／ ｍｍ１位であるから、このときの音速は１
８４９０ｍ ／ ｓｅｃ、である。The yarn used in Examples 1 to 4 above has a low utilization rate of 1 strength and elastic modulus of 50% (1 strength 1O% 1 elastic modulus), but future technology will approach the theoretical values of polyethylene. In this case, the ideal elastic modulus of polyethylene is 2413
Since it is 75Kg/mm1, the speed of sound at this time is 1
8490m/sec.
弾性率が向上した場合、一方向性（ＵＤ）のものを、角
度を違えて積層したストレートコーンとしての使い方が
音速を上げるのに有効である。When the elastic modulus is improved, it is effective to use unidirectional (UD) materials as a straight cone in which they are laminated at different angles to increase the speed of sound.
また、素材の耐熱温度が１５０℃であるので、耐パワー
性が要求される場合（最大入力が大きく、金属ボイスコ
イルボビンと接するような場合）には、第２図に示すよ
うに、コーン振動板１のネック部に耐熱性縁ｉ１（例え
ば、炭化硅素（Ｓｉｎ）繊維等）よりなる部分的積層板
４を設けることもできる。また、上記した糸は透明色に
近いが、この糸を染色したり樹脂に染料や顔料を混入し
て任意の色に彩色することもでき、これによって商品性
を向上させることができる。なお、第１図及び第２図に
おいて、５はエツジを示している。In addition, since the material has a heat resistance temperature of 150°C, if power resistance is required (in cases where the maximum input is large and comes into contact with a metal voice coil bobbin), a cone diaphragm plate can be used as shown in Figure 2. It is also possible to provide a partially laminated plate 4 made of a heat-resistant edge i1 (for example, silicon carbide (Sin) fibers, etc.) at the neck portion of 1. Furthermore, although the above-mentioned thread has a nearly transparent color, it is also possible to dye the thread or mix dyes or pigments into the resin to give it any desired color, thereby improving its marketability. In addition, in FIG. 1 and FIG. 2, 5 indicates an edge.
「発明の効果Ｊ
本発明に係るスピーカ用振動板によれば、引張強度２０
ｇ／ｄ以上、引張弾性率５００ｇ／ｄ以上の高強度・高
弾性率ポリエチレン繊維よりなる布帛と樹脂とで成形さ
れているから、比強度、比弾性に優れているのは勿論、
比重が小さいために軽量化でき、また、従来の無機繊維
強化プラスチックによる振動板に比して内部損失が大き
く、高域での材料鳴きを抑えることができて高域での周
波数特性も平坦化できる等の効果がある。“Effect of the invention J According to the speaker diaphragm according to the present invention, the tensile strength is 20
Since it is molded from resin and a fabric made of high-strength, high-modulus polyethylene fibers with a tensile modulus of over 500 g/d and a tensile modulus of over 500 g/d, it has excellent specific strength and specific elasticity.
It can be made lighter due to its low specific gravity, and has a higher internal loss than conventional inorganic fiber reinforced plastic diaphragms, suppressing material squeal in the high range and flattening the frequency response in the high range. There are effects such as being able to do it.
第１図乃至第３図は本発明に係るスピーカ用振動板の実
施例を示し、第１図は一部を断面した斜視図、第２図は
他の構成例を示す断面図、第３図は周波数比較特性図で
ある。
ｌ：コーン型振動板全体、２：布1 to 3 show an embodiment of a speaker diaphragm according to the present invention, FIG. 1 is a partially sectional perspective view, FIG. 2 is a sectional view showing another example of the structure, and FIG. is a frequency comparison characteristic diagram. l: Entire cone-shaped diaphragm, 2: Cloth
Claims (1)
以上の高強度・高弾性率ポリエチレン繊維を使用した少
なくとも１枚の布帛で、樹脂を強化したものからなるこ
とを特徴とするスピーカ用振動板。 ２、振動板がコーン型振動板であり、ネック部分には耐
熱繊維で構成される強化プラスチック層が積層されてい
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。[Claims] 1. Tensile strength 20 g/d or more, tensile modulus 500 g/d
A diaphragm for a speaker, characterized in that it is made of at least one fabric made of the above-mentioned high-strength, high-modulus polyethylene fibers and reinforced with resin. 2. The speaker diaphragm according to claim 1, wherein the diaphragm is a cone-shaped diaphragm, and a reinforced plastic layer made of heat-resistant fibers is laminated on the neck portion.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301421A JP2610458B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
| US07/276,940 US5031720A (en) | 1987-12-01 | 1988-11-28 | Speaker diaphragm |
| DE1988119989 DE322587T1 (en) | 1987-12-01 | 1988-11-30 | SPEAKER MEMBRANE. |
| DE19883852941 DE3852941T2 (en) | 1987-12-01 | 1988-11-30 | Speaker cone. |
| EP19880119989 EP0322587B1 (en) | 1987-12-01 | 1988-11-30 | Speaker diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301421A JP2610458B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01144894A true JPH01144894A (en) | 1989-06-07 |
| JP2610458B2 JP2610458B2 (en) | 1997-05-14 |
Family
ID=17896671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62301421A Expired - Fee Related JP2610458B2 (en) | 1987-12-01 | 1987-12-01 | Speaker diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2610458B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04102396U (en) * | 1991-02-04 | 1992-09-03 | 株式会社ケンウツド | Diaphragm for speaker |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395617A (en) * | 1977-02-01 | 1978-08-22 | Matsushita Electric Ind Co Ltd | Acoustic diapharagm |
| JPS55127493U (en) * | 1979-02-28 | 1980-09-09 | ||
| JPS5899996U (en) * | 1981-12-25 | 1983-07-07 | 松下電器産業株式会社 | Diaphragm for speaker |
| JPS59130313A (en) * | 1982-12-28 | 1984-07-26 | Mitsui Petrochem Ind Ltd | Manufacture of drawn ultra-high-molecular-weight polyethylene |
| JPS6047391U (en) * | 1983-09-08 | 1985-04-03 | ヤマハ株式会社 | speaker diaphragm |
| JPS6129589U (en) * | 1984-07-27 | 1986-02-22 | 株式会社ケンウッド | Diaphragm for speaker |
| JPS62157500A (en) * | 1985-12-28 | 1987-07-13 | Agency Of Ind Science & Technol | Acoustic diaphragm |
| JPS63189098A (en) * | 1987-01-31 | 1988-08-04 | Sony Corp | Acoustic diaphragm |
-
1987
- 1987-12-01 JP JP62301421A patent/JP2610458B2/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395617A (en) * | 1977-02-01 | 1978-08-22 | Matsushita Electric Ind Co Ltd | Acoustic diapharagm |
| JPS55127493U (en) * | 1979-02-28 | 1980-09-09 | ||
| JPS5899996U (en) * | 1981-12-25 | 1983-07-07 | 松下電器産業株式会社 | Diaphragm for speaker |
| JPS59130313A (en) * | 1982-12-28 | 1984-07-26 | Mitsui Petrochem Ind Ltd | Manufacture of drawn ultra-high-molecular-weight polyethylene |
| JPS6047391U (en) * | 1983-09-08 | 1985-04-03 | ヤマハ株式会社 | speaker diaphragm |
| JPS6129589U (en) * | 1984-07-27 | 1986-02-22 | 株式会社ケンウッド | Diaphragm for speaker |
| JPS62157500A (en) * | 1985-12-28 | 1987-07-13 | Agency Of Ind Science & Technol | Acoustic diaphragm |
| JPS63189098A (en) * | 1987-01-31 | 1988-08-04 | Sony Corp | Acoustic diaphragm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04102396U (en) * | 1991-02-04 | 1992-09-03 | 株式会社ケンウツド | Diaphragm for speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2610458B2 (en) | 1997-05-14 |
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