JP2001036987A - Speaker unit and production thereof - Google Patents
Speaker unit and production thereofInfo
- Publication number
- JP2001036987A JP2001036987A JP11203218A JP20321899A JP2001036987A JP 2001036987 A JP2001036987 A JP 2001036987A JP 11203218 A JP11203218 A JP 11203218A JP 20321899 A JP20321899 A JP 20321899A JP 2001036987 A JP2001036987 A JP 2001036987A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- edge
- gasket
- speaker unit
- edge portion
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スピーカーユニッ
トに関する。より詳細には、本発明は、優れた振動伝達
特性を有し、かつ、安価で製造効率に優れるスピーカー
ユニットに関する。[0001] The present invention relates to a speaker unit. More specifically, the present invention relates to a speaker unit that has excellent vibration transmission characteristics, is inexpensive, and has excellent manufacturing efficiency.
【０００２】[0002]
【従来の技術】図６は、従来のスピーカーユニットを説
明するための概略断面図である。このスピーカーユニッ
トは、各々別体である振動板４とエッジ２とガスケット
５とを有する。エッジ２は、その外周端部２ａがフレー
ム１の環状鍔部１ａに座紙３を介して固着されている。
エッジの内周端部２ｂは、接着剤を介して振動板４に貼
り付けられている。さらに、エッジ２の外周端部２ａ上
には、ガスケット５が接着されている。また、ガスケッ
ト部分に矢ゴムや補強紙が用いられることもある。2. Description of the Related Art FIG. 6 is a schematic sectional view for explaining a conventional speaker unit. This speaker unit has a diaphragm 4, an edge 2, and a gasket 5 which are separate bodies. The edge 2 has an outer peripheral end 2 a fixed to an annular flange 1 a of the frame 1 via a washer 3.
The inner peripheral end 2b of the edge is attached to the diaphragm 4 via an adhesive. Further, a gasket 5 is adhered on the outer peripheral end 2 a of the edge 2. In addition, arrow rubber or reinforcing paper may be used for the gasket portion.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このようなス
ピーカーは、各々別体である振動板とエッジとガスケッ
トとを互いに貼り付けて形成しているので、貼り付け部
分でそれぞれの内部損失が不連続な部分を生じる。その
結果、貼り付け部分で振動の反射が発生するので、従来
のスピーカーは、音響特性の観点から非常に大きな問題
を有している。さらに、このようなスピーカーは、部品
点数が多くなってしまう。その結果、このようなスピー
カーは、コストが高い、製造工程が多くなり製造効率が
低いといった問題も有している。However, since such a speaker is formed by adhering a diaphragm, an edge and a gasket which are separate bodies to each other, the internal loss at the adhering portion is small. Produces a continuous part. As a result, the reflection of the vibration occurs at the attached portion, and thus the conventional speaker has a very large problem from the viewpoint of the acoustic characteristics. Further, such a speaker has a large number of parts. As a result, such a loudspeaker also has problems that the cost is high, the number of manufacturing steps is large, and the manufacturing efficiency is low.
【０００４】本発明は、上記従来の課題を解決するため
になされたものであり、その目的とするところは、優れ
た振動伝達特性を有し、かつ、安価で製造効率に優れる
スピーカーユニットを提供することにある。The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a speaker unit which has excellent vibration transmission characteristics, is inexpensive and has excellent manufacturing efficiency. Is to do.
【０００５】[0005]
【課題を解決するための手段】本発明のスピーカーユニ
ットは、振動板部分とエッジ部分とガスケット部分とを
備え、該ガスケット部分の発泡倍率が該エッジ部分側か
ら外側に向けて漸近的に増大するようにして、該エッジ
部分と該ガスケット部分とが発泡弾性材料から一体成形
されるとともに；該振動板部分と該エッジ部分との接合
部におけるエッジ部分の発泡倍率が該エッジ部分側から
該振動板の本体部分側に向けて漸近的に減少するように
して、該振動板部分と該エッジ部分とが熱プレスにより
密着固定されている。SUMMARY OF THE INVENTION A speaker unit according to the present invention includes a diaphragm portion, an edge portion, and a gasket portion, and the expansion ratio of the gasket portion increases asymptotically from the edge portion side to the outside. In this way, the edge portion and the gasket portion are integrally formed from a foamed elastic material; and the expansion ratio of the edge portion at the joint between the diaphragm portion and the edge portion is increased from the edge portion side to the diaphragm. The diaphragm portion and the edge portion are tightly fixed by a hot press so as to asymptotically decrease toward the main body portion side.
【０００６】好ましい実施形態においては、上記接合部
の厚みは、上記振動板の本体部分の厚みと同一である。In a preferred embodiment, the thickness of the joint is the same as the thickness of the main body of the diaphragm.
【０００７】本発明の別の局面によれば、スピーカーユ
ニットの製造方法が提供される。この製造方法は、周縁
部に向かって漸近的に減少する断面厚みを有する振動板
部分を形成する工程と；ガスケット部分の発泡倍率がエ
ッジ部分側から外側に向けて漸近的に増大するようにし
て、エッジ部分とガスケット部分とを発泡弾性材料から
一体成形するとともに、該振動板部分と該エッジ部分と
の接合部におけるエッジ部分の発泡倍率が該エッジ部分
側から該振動板の本体部分側に向けて漸近的に減少する
ようにして、該振動板部分と該エッジ部分とを熱プレス
により密着固定する工程とを含む。[0007] According to another aspect of the present invention, there is provided a method of manufacturing a speaker unit. The manufacturing method includes a step of forming a diaphragm portion having a cross-sectional thickness that asymptotically decreases toward a peripheral portion; and a method in which a foaming ratio of a gasket portion is asymptotically increased from an edge portion side toward an outer side. The edge portion and the gasket portion are integrally formed from a foamed elastic material, and the expansion ratio of the edge portion at the joint between the diaphragm portion and the edge portion is from the edge portion side toward the body portion side of the diaphragm. And fixing the vibrating plate portion and the edge portion in close contact with each other by hot pressing.
【０００８】[0008]
【発明の実施の形態】図１は、本発明の好ましい実施形
態によるスピーカーユニットの概略断面図である。この
スピーカーユニット１００は、振動板部分１４とエッジ
部分１２とガスケット部分１５とを有する。FIG. 1 is a schematic sectional view of a speaker unit according to a preferred embodiment of the present invention. The speaker unit 100 has a diaphragm portion 14, an edge portion 12, and a gasket portion 15.
【０００９】エッジ部分１２とガスケット部分１５と
は、任意の適切な発泡弾性材料から一体成形されてい
る。発泡弾性材料の代表例としては、発泡ゴム、ポリウ
レタンが挙げられる。内部損失が大きいという理由で、
発泡ゴムが好ましい。ガスケット部分１５の発泡倍率
は、エッジ部分１２の側から外側に向けて漸近的に増大
する。発泡倍率は外側に向けて漸近的に増大しさえすれ
ばよく、増大の仕方は特に限定されない。ガスケット部
分１５の発泡倍率が漸近的に増大すれば、内部損失も連
続的に変化するので、その結果、エッジ部分１２を減衰
しきれずに伝わってきた振動がガスケット部分によって
減衰させられ、振動の反射が起こりにくくなるからであ
る。The edge portion 12 and the gasket portion 15 are integrally formed from any suitable foamed elastic material. Representative examples of the foamed elastic material include foamed rubber and polyurethane. Because of the high internal loss,
Foam rubber is preferred. The expansion ratio of the gasket portion 15 increases asymptotically from the side of the edge portion 12 toward the outside. The expansion ratio only needs to increase asymptotically toward the outside, and the manner of increase is not particularly limited. If the expansion ratio of the gasket portion 15 asymptotically increases, the internal loss also changes continuously. As a result, the vibration transmitted without fully attenuating the edge portion 12 is attenuated by the gasket portion, and the reflection of the vibration is performed. Is less likely to occur.
【００１０】図２は、振動板部分１４とエッジ部分１２
との接合部２０の拡大断面図である。図２に示すよう
に、振動板部分１４の外周端部１４ａは、外側（エッジ
部分側）に向けてその厚みが連続的に減少するテーパー
状の断面形状を有する。なお、本発明においては、振動
板部分１４を形成する材料は特に限定されず、任意の適
切な振動板材料が用いられ得る。テーパー状断面の成形
性およびエッジ部分との密着性を考慮すると、熱硬化性
樹脂（例えば、不飽和ポリエステル樹脂）を含浸した絹
不織布が好ましい。FIG. 2 shows a diaphragm portion 14 and an edge portion 12.
FIG. 4 is an enlarged cross-sectional view of a joining portion 20 with FIG. As shown in FIG. 2, the outer peripheral end 14a of the diaphragm portion 14 has a tapered cross-sectional shape whose thickness continuously decreases outward (toward the edge portion). In the present invention, the material forming the diaphragm portion 14 is not particularly limited, and any appropriate diaphragm material may be used. Considering the moldability of the tapered cross section and the adhesion to the edge portion, a silk nonwoven fabric impregnated with a thermosetting resin (for example, an unsaturated polyester resin) is preferable.
【００１１】さらに、当該接合部２０におけるエッジ部
分１２（すなわち、エッジ内周端部１２ｂ）の発泡倍率
は、エッジ部分１２側から振動板１４の本体部分に向け
て漸近的に減少している。振動板部分１４の外周端部１
４ａとエッジ内周端部１２ｂとは、何ら接着剤を介する
ことなく熱プレスにより密着固定されている。上記ガス
ケット部分の場合と同様に、エッジ内周端部１２ｂの発
泡倍率もまた、振動板部分１４に向けて漸近的に減少し
さえすればよく、減少の仕方は特に限定されない。エッ
ジ内周端部１２ｂの発泡倍率が連続的に変化すれば、接
合部２０における振動伝搬の媒質が連続的に変化するの
に等しい。従って、振動板部分１４からの振動が接合部
２０において良好に減衰させられ、振動の反射が起こり
にくくなるからである。材質の差による振動伝搬のギャ
ップを抑えるという観点からは、図２に示すように、接
合部２０の断面厚みが振動板１４の本体部分の断面厚み
と同一であることが好ましい。さらに、発泡倍率はでき
るだけ緩やかに変化するのが好ましい（例えば、図２の
角度αは、好ましくは１〜５度、さらに好ましくは２〜
３度である）。Furthermore, the expansion ratio of the edge portion 12 (that is, the edge inner peripheral end portion 12b) of the joining portion 20 is asymptotically reduced from the edge portion 12 toward the main body of the diaphragm 14. Outer end 1 of diaphragm portion 14
4a and the inner edge 12b of the edge are tightly fixed by a hot press without any adhesive. As in the case of the gasket portion, the expansion ratio of the inner edge 12b of the edge only needs to be asymptotically reduced toward the diaphragm portion 14, and the manner of the reduction is not particularly limited. A continuous change in the expansion ratio of the inner edge 12b of the edge is equivalent to a continuous change in the medium of vibration propagation at the joint 20. Therefore, the vibration from the vibration plate portion 14 is favorably attenuated in the joint portion 20, and the reflection of the vibration hardly occurs. From the viewpoint of suppressing the gap of the vibration propagation due to the difference in the material, as shown in FIG. Further, the expansion ratio is preferably changed as slowly as possible (for example, the angle α in FIG. 2 is preferably 1 to 5 degrees, more preferably 2 to 5 degrees).
3 degrees).
【００１２】次に、本発明のスピーカーユニットの製造
方法の好ましい一例について説明する。Next, a preferred example of the method for manufacturing the speaker unit of the present invention will be described.
【００１３】まず、任意の適切な方法で、所定の形状
（例えば、コーン状）を有する振動板部分１４を形成す
る。その際、振動板部分１４の外周端部１４ａは、断面
形状が周縁部に向かって漸近的に減少するテーパー形状
に形成する。First, the diaphragm portion 14 having a predetermined shape (for example, a cone shape) is formed by any appropriate method. At this time, the outer peripheral end 14a of the diaphragm portion 14 is formed in a tapered shape whose cross-sectional shape gradually decreases toward the peripheral edge.
【００１４】次いで、ガスケット部分１５の発泡倍率が
エッジ部分１２側から外側に向けて漸近的に増大するよ
うにして、エッジ部分１２とガスケット部分１５とを発
泡弾性材料から一体成形すると同時に、接合部２０にお
けるエッジ部分（すなわち、エッジ内周端部１２ｂ）の
発泡倍率が当該エッジ部分１２側から振動板の本体部分
１４側に向けて漸近的に減少するようにして、振動板外
周端部１４ａとエッジ内周端部１２ｂとを熱プレスによ
り密着固定する。具体的には、(i)所望の発泡倍率を有
するエッジ内周端部１２ｂおよびガスケット部分１５が
得られるような所定の傾斜面を有する金型を用意し；(i
i)接合部２０において所望の発泡倍率が得られるように
位置決めして、この金型の下型に振動板部分（例えば、
成形コーン）を配置し；(iii)発泡弾性材料を下型に配
置し；(iv)任意の適切な条件で熱プレスして、成形と発
泡とを同時に行う。熱プレスにより発泡弾性材料が金型
内を流動して振動板外周端部１４ａに接触し、発泡によ
り押し付けられて密着する。代表的には、加熱温度（金
型温度）は１１０〜１５０℃、加熱時間は３０〜５０秒
である。このような製造方法によれば、金型の形状を変
えるだけで所定の部分の発泡倍率を精密に制御できる。Next, the edge portion 12 and the gasket portion 15 are integrally molded from the foamed elastic material so that the expansion ratio of the gasket portion 15 is asymptotically increased from the edge portion 12 side to the outside. 20 so that the expansion ratio of the edge portion (that is, the inner edge portion 12b of the edge) asymptotically decreases from the edge portion 12 side toward the main body portion 14 side of the diaphragm. The inner edge 12b of the edge is tightly fixed by hot pressing. Specifically, (i) a mold having a predetermined inclined surface such that an edge inner peripheral end portion 12b having a desired expansion ratio and a gasket portion 15 are obtained;
i) It is positioned so that a desired expansion ratio is obtained at the joint portion 20, and a diaphragm portion (for example,
(Iii) placing the foamed elastic material in the lower mold; (iv) hot pressing under any suitable conditions to simultaneously perform the molding and foaming. The hot elastic press causes the foamed elastic material to flow in the mold and come into contact with the outer peripheral end portion 14a of the vibration plate, and is pressed and adhered by the foaming. Typically, the heating temperature (mold temperature) is 110 to 150 ° C., and the heating time is 30 to 50 seconds. According to such a manufacturing method, the expansion ratio of a predetermined portion can be precisely controlled only by changing the shape of the mold.
【００１５】[0015]
【実施例】（実施例１）図１および図２に示すようなス
ピーカーユニットを作製した。ここで、図２における角
度αを２．７５度とした。得られたスピーカーユニット
を床に配置し金属棒で強打したときの逆起電力と周波数
特性を測定した。結果を図３に示す。EXAMPLES (Example 1) A speaker unit as shown in FIGS. 1 and 2 was manufactured. Here, the angle α in FIG. 2 was set to 2.75 degrees. The resulting speaker unit was placed on the floor, and the back electromotive force and frequency characteristics when the metal unit was hit with a metal rod were measured. The results are shown in FIG.
【００１６】（比較例１）図６に示すようなスピーカー
ユニットを作製した。ただし、ガスケット５の代わりに
矢ゴムを設けた。得られたスピーカーユニットを床に配
置し金属棒で強打したときの逆起電力と周波数特性を測
定した。結果を図４に示す。Comparative Example 1 A speaker unit as shown in FIG. 6 was manufactured. However, an arrow rubber was provided instead of the gasket 5. The resulting speaker unit was placed on the floor, and the back electromotive force and frequency characteristics when the metal unit was hit with a metal rod were measured. FIG. 4 shows the results.
【００１７】（比較例２）矢ゴムがないこと以外は比較
例１と同様にしてスピーカーユニットを作製した。得ら
れたスピーカーユニットを床に配置し金属棒で強打した
ときの逆起電力と周波数特性を測定した。結果を図５に
示す。(Comparative Example 2) A speaker unit was produced in the same manner as in Comparative Example 1 except that no rubber arrow was used. The resulting speaker unit was placed on the floor, and the back electromotive force and frequency characteristics when the metal unit was hit with a metal rod were measured. FIG. 5 shows the results.
【００１８】図３と図４および図５とを比較すると明ら
かなように、本発明のスピーカーユニットは、従来のス
ピーカーユニットに比べて、時間に依存した逆起電力の
ぶれが少なく、かつ、特に高周波領域での周波数特性が
良好である。As is apparent from a comparison between FIG. 3 and FIGS. 4 and 5, the speaker unit of the present invention has less time-dependent back electromotive force fluctuation than the conventional speaker unit, and in particular, Good frequency characteristics in high frequency range.
【００１９】[0019]
【発明の効果】本発明によれば、ガスケット部分の発泡
倍率を制御しながらガスケット部分とエッジ部分とを一
体成形し、かつ、エッジ部分の発泡倍率を制御しながら
エッジ部分と振動板部分とを熱プレスにより密着固定さ
せることにより、振動の反射が極めて少なく振動伝達特
性に優れた（結果的に、音響特性に優れた）スピーカー
ユニットが得られる。さらに、このスピーカーユニット
は、部品点数が少ないので低コストであり、かつ、発泡
と熱プレスによる密着固定とを１工程で行うので工程数
が少なく製造効率に優れる。According to the present invention, the gasket portion and the edge portion are integrally formed while controlling the expansion ratio of the gasket portion, and the edge portion and the diaphragm portion are formed while controlling the expansion ratio of the edge portion. By closely contacting and fixing by a heat press, a speaker unit having very little vibration reflection and excellent vibration transmission characteristics (and consequently excellent acoustic characteristics) can be obtained. Further, the speaker unit has a small number of parts and therefore is low in cost, and the number of steps is small and the production efficiency is excellent since foaming and close contact fixing by hot pressing are performed in one step.
【図１】本発明の好ましい実施形態によるスピーカーユ
ニットの概略断面図である。FIG. 1 is a schematic sectional view of a speaker unit according to a preferred embodiment of the present invention.
【図２】図１のスピーカーユニットにおける接合部の拡
大断面図である。FIG. 2 is an enlarged sectional view of a joint in the speaker unit of FIG.
【図３】（ａ）は、本発明のスピーカーユニットについ
ての逆起電力の測定結果を示すグラフであり；（ｂ）
は、本発明のスピーカーユニットの周波数特性を示すグ
ラフである。FIG. 3 (a) is a graph showing measurement results of back electromotive force for the speaker unit of the present invention; (b)
5 is a graph showing frequency characteristics of the speaker unit of the present invention.
【図４】（ａ）は、従来のスピーカーユニットについて
の逆起電力の測定結果を示すグラフであり；（ｂ）は、
従来のスピーカーユニットの周波数特性を示すグラフで
ある。FIG. 4 (a) is a graph showing measurement results of back electromotive force for a conventional speaker unit;
9 is a graph showing frequency characteristics of a conventional speaker unit.
【図５】（ａ）は、従来のスピーカーユニットについて
の逆起電力の測定結果を示すグラフであり；（ｂ）は、
従来のスピーカーユニットの周波数特性を示すグラフで
ある。FIG. 5 (a) is a graph showing measurement results of back electromotive force for a conventional speaker unit;
9 is a graph showing frequency characteristics of a conventional speaker unit.
【図６】従来のスピーカーユニットの概略断面図であ
る。FIG. 6 is a schematic sectional view of a conventional speaker unit.
１２ エッジ部分 １２ｂ エッジ内周端部 １４ 振動板部分 １４ａ 振動板外周端部 １５ ガスケット部分 ２０ 接合部 １００ スピーカーユニット DESCRIPTION OF SYMBOLS 12 Edge part 12b Edge inner peripheral end part 14 Diaphragm part 14a Diaphragm outer peripheral end part 15 Gasket part 20 Joint part 100 Speaker unit
Claims (3)
分とを備えるスピーカーユニットであって、 該ガスケット部分の発泡倍率が該エッジ部分側から外側
に向けて漸近的に増大するようにして、該エッジ部分と
該ガスケット部分とが発泡弾性材料から一体成形される
とともに、 該振動板部分と該エッジ部分との接合部におけるエッジ
部分の発泡倍率が該エッジ部分側から該振動板の本体部
分側に向けて漸近的に減少するようにして、該振動板部
分と該エッジ部分とが熱プレスにより密着固定されてい
る、 スピーカーユニット。1. A speaker unit comprising a diaphragm portion, an edge portion, and a gasket portion, wherein the expansion ratio of the gasket portion is asymptotically increased from the edge portion side to the outside. The part and the gasket part are integrally formed from a foamed elastic material, and the expansion ratio of the edge part at the joint between the diaphragm part and the edge part is from the edge part side to the body part side of the diaphragm. The speaker unit, wherein the diaphragm portion and the edge portion are tightly fixed by a hot press so as to asymptotically decrease.
部分の厚みと同一である、請求項１に記載のスピーカー
ユニット。2. The speaker unit according to claim 1, wherein the thickness of the joint is the same as the thickness of the main body of the diaphragm.
厚みを有する振動板部分を形成する工程と、 ガスケット部分の発泡倍率がエッジ部分側から外側に向
けて漸近的に増大するようにして、エッジ部分とガスケ
ット部分とを発泡弾性材料から一体成形するとともに、
該振動板部分と該エッジ部分との接合部におけるエッジ
部分の発泡倍率が該エッジ部分側から該振動板の本体部
分側に向けて漸近的に減少するようにして、該振動板部
分と該エッジ部分とを熱プレスにより密着固定する工程
とを含む、スピーカーユニットの製造方法。3. A step of forming a diaphragm portion having a cross-sectional thickness that decreases asymptotically toward the peripheral portion, and wherein the expansion ratio of the gasket portion increases asymptotically from the edge portion side toward the outside. , While integrally molding the edge portion and the gasket portion from a foamed elastic material,
The expansion ratio of the edge portion at the joint between the diaphragm portion and the edge portion is asymptotically reduced from the edge portion side toward the body portion side of the diaphragm, so that the diaphragm portion and the edge And a step of tightly fixing the portion with a hot press.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20321899A JP3698295B2 (en) | 1999-07-16 | 1999-07-16 | Speaker unit and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20321899A JP3698295B2 (en) | 1999-07-16 | 1999-07-16 | Speaker unit and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001036987A true JP2001036987A (en) | 2001-02-09 |
| JP3698295B2 JP3698295B2 (en) | 2005-09-21 |
Family
ID=16470424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20321899A Expired - Fee Related JP3698295B2 (en) | 1999-07-16 | 1999-07-16 | Speaker unit and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3698295B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7177438B2 (en) | 2001-11-16 | 2007-02-13 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Speaker for vehicle and mounting structure of the speaker |
| JP2007082009A (en) * | 2005-09-15 | 2007-03-29 | Nec Saitama Ltd | Panel speaker |
| JP2008236717A (en) * | 2007-03-20 | 2008-10-02 | Estec Corp | Speaker |
| JP2011066674A (en) * | 2009-09-17 | 2011-03-31 | Panasonic Corp | Diaphragm for speaker, and speaker using the same |
| US8131001B2 (en) | 2007-08-07 | 2012-03-06 | Onkyo Corporation | Speaker diaphragm and electrodynamic loudspeaker using the same |
| US9510099B2 (en) | 2013-04-01 | 2016-11-29 | Pioneer Corporation | Speaker device |
| US9729972B2 (en) | 2013-04-01 | 2017-08-08 | Pioneer Corporation | Speaker device |
-
1999
- 1999-07-16 JP JP20321899A patent/JP3698295B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7177438B2 (en) | 2001-11-16 | 2007-02-13 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Speaker for vehicle and mounting structure of the speaker |
| JP2007082009A (en) * | 2005-09-15 | 2007-03-29 | Nec Saitama Ltd | Panel speaker |
| JP2008236717A (en) * | 2007-03-20 | 2008-10-02 | Estec Corp | Speaker |
| US8131001B2 (en) | 2007-08-07 | 2012-03-06 | Onkyo Corporation | Speaker diaphragm and electrodynamic loudspeaker using the same |
| JP2011066674A (en) * | 2009-09-17 | 2011-03-31 | Panasonic Corp | Diaphragm for speaker, and speaker using the same |
| US9729972B2 (en) | 2013-04-01 | 2017-08-08 | Pioneer Corporation | Speaker device |
| US9510099B2 (en) | 2013-04-01 | 2016-11-29 | Pioneer Corporation | Speaker device |
| US9900699B2 (en) | 2013-04-01 | 2018-02-20 | Pioneer Corporation | Speaker device |
| US10433065B2 (en) | 2013-04-01 | 2019-10-01 | Pioneer Corporation | Speaker device |
| US10841705B2 (en) | 2013-04-01 | 2020-11-17 | Pioneer Corporation | Speaker device |
| US11337004B2 (en) | 2013-04-01 | 2022-05-17 | Pioneer Corporation | Speaker device |
| US11671758B2 (en) | 2013-04-01 | 2023-06-06 | Pioneer Corporation | Speaker device |
| US12058502B2 (en) | 2013-04-01 | 2024-08-06 | Pioneer Corporation | Speaker device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3698295B2 (en) | 2005-09-21 |
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