JPH09135491A - Electroacoustic transducer - Google Patents
Electroacoustic transducerInfo
- Publication number
- JPH09135491A JPH09135491A JP28978095A JP28978095A JPH09135491A JP H09135491 A JPH09135491 A JP H09135491A JP 28978095 A JP28978095 A JP 28978095A JP 28978095 A JP28978095 A JP 28978095A JP H09135491 A JPH09135491 A JP H09135491A
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- diaphragm
- dome
- edge
- 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.)
- Pending
Links
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 14
- 230000000630 rising effect Effects 0.000 claims abstract description 7
- 229920006255 plastic film Polymers 0.000 claims description 5
- 239000002991 molded plastic Substances 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 9
- 230000002787 reinforcement Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気音響変換器に
関し、さらに詳しくはドーム部の周辺にエッジ部を備え
た振動板を備えた電気音響変換器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electroacoustic transducer, and more particularly to an electroacoustic transducer including a diaphragm having an edge portion around a dome portion.
【０００２】[0002]
【従来の技術】この種の電気音響変換器で例えばスピー
カでは小型の場合その高能率と高帯域とを達成するため
に、振動板は軽量薄膜化が図られエッジ部も幅広くされ
ているものがある。図４および図５を参照してこのよう
な小型スピーカについて説明する。図４はこの小型スピ
ーカ１0において右側半分は外形、左側半分は断面で示
し、図５ａ，ｂは図４の振動板の平面と側面とを示す図
である。これらの図において、フレーム２は中央位置が
下方に凹部をなしており、この凹部の底面上にマグネッ
ト３が載置され、そのマグネット３の上にプレート４が
載置されている。2. Description of the Related Art In this type of electro-acoustic transducer, for example, in the case of a small speaker, in order to achieve high efficiency and high band, the diaphragm has a lightweight thin film and a wide edge portion. is there. Such a small speaker will be described with reference to FIGS. 4 and 5. Figure 4 is a right half in the small speaker 1 0 contour, the left half shown in section, FIG. 5a, b is a diagram showing a plane and side surfaces of the diaphragm of FIG. In these figures, the frame 2 has a recessed portion at the center, and the magnet 3 is placed on the bottom surface of the recessed portion, and the plate 4 is placed on the magnet 3.
【０００３】振動板５0は、軽量薄膜化のためプラスチ
ックフィルムのような材料を用いて構成され、フレーム
２の中央位置に対応する上方位置つまりプレート４の上
方位置でドーム状換言すれば半球状に上方に膨らんだ形
状のドーム部６0と、そのドーム部６0の周辺から振動板
２の外周縁までの間で上方に凸状に膨らんだ形状のエッ
ジ部７0とで一体成形されてなる。そして、このエッジ
部７0の外周縁はフレーム２の外周縁に連結固定されて
いるとともに、ドーム部６0とエッジ部７0との境界位置
には、ボイスコイル８の一端側が接合され、このボイス
コイル８の他端側はフレーム２の中央凹部内壁とマグネ
ット３との間に懸垂されている。[0003] diaphragm 5 0 is configured by using a material such as plastic film for weight thin, hemispherical other words domed at a position above the upper position that is the plate 4 corresponding to the central position of the frame 2 the dome portion 6 0 bulged upward, is integrally formed with an edge portion 7 0 of bulged convexly upward between the periphery of the dome portion 6 0 to the outer peripheral edge of the diaphragm 2 Become. Then, together with the outer peripheral edge of the edge portion 7 0 is connected and fixed to the outer periphery of the frame 2, the boundary position between the dome portion 6 0 and the edge portion 7 0, one end of the voice coil 8 is joined, the The other end of the voice coil 8 is suspended between the inner wall of the central recess of the frame 2 and the magnet 3.
【０００４】[0004]
【発明が解決しようとする課題】一般に、ボイスコイル
８は、その固体の物性により決まる周波数において共振
現象が生じるとともに、その最低の固有共振においてボ
イスコイル８が径方向つまり図４の左右方向に伸縮振動
することはよく知られている。このようなボイスコイル
８の共振現象に伴う伸縮振動が、スピーカの小型軽量薄
膜化などのためにプラスチックフィルム等の材料を用い
て厚さが薄く構成されたために剛性が低くなっている振
動板５0に伝えられると、振動板５0が容易に不要振動を
引き起こされてしまう。その結果、図６のスピーカの周
波数特性図に示されるように、低周波領域から高周波領
域の所望の平坦な周波数領域において、特定の周波数領
域例えば５０００Ｈｚ付近で音圧を著しく低下させてし
まう結果となる。このような５０００Ｈｚ近傍での音圧
の極端な低下は勿論、スピーカとしての音響性能を著し
く低下させてしまうものである。Generally, in the voice coil 8, a resonance phenomenon occurs at a frequency determined by the physical properties of the solid, and at the lowest natural resonance, the voice coil 8 expands and contracts in the radial direction, that is, the horizontal direction in FIG. It is well known to vibrate. The vibrating plate 5 has a low rigidity because the stretching vibration due to the resonance phenomenon of the voice coil 8 is made thin by using a material such as a plastic film for making the speaker small and lightweight and thin. When delivered to 0, the diaphragm 5 0 will be caused easily unwanted vibration. As a result, as shown in the frequency characteristic diagram of the speaker of FIG. 6, in the desired flat frequency region from the low frequency region to the high frequency region, the sound pressure is significantly reduced in a specific frequency region, for example, near 5000 Hz. Become. In addition to such an extreme decrease in sound pressure in the vicinity of 5000 Hz, the acoustic performance of the speaker is significantly deteriorated.
【０００５】本発明は、上述したようなボイスコイルの
固有共振による振動板の異常振動を簡単な構造のもので
容易に抑制できるようにして全体の音響周波数特性を大
幅に改善できるようにすることを主たる解決すべき課題
としている。According to the present invention, the abnormal vibration of the diaphragm due to the natural resonance of the voice coil as described above can be easily suppressed with a simple structure so that the overall acoustic frequency characteristic can be greatly improved. Is the main issue to be solved.
【０００６】[0006]
【課題を解決するための手段】本発明では、上述の課題
を解決するために、次のように手段を採用しているので
ある。すなわち、本発明は、ドーム部の周辺にエッジ部
を備えた振動板を備え、前記ドーム部と前記エッジ部と
の境界位置にボイスコイルの一端側が設けられてなる電
気音響変換器において、前記振動板の前記境界位置に平
坦部を設けたことによって前述した課題を解決した構成
のものとしている。In order to solve the above problems, the present invention employs the following means. That is, the present invention provides an electroacoustic transducer comprising a diaphragm having an edge portion around a dome portion, and one end side of a voice coil being provided at a boundary position between the dome portion and the edge portion. By providing a flat portion at the boundary position of the plate, the above-mentioned problem is solved.
【０００７】本発明の電気音響変換器は、好ましくは、
境界位置におけるドーム部およびエッジ部の少なくとも
いずれか一方の立ち上がり部分に、補強用リブを形成し
て前述した課題を解決したものでもよく、また、好まし
くはドーム部、エッジ部および補強用リブを有する振動
板をプラスチックフィルムの一体成型品で構成すること
で前述した課題を解決してもよい。The electroacoustic transducer of the present invention is preferably
The above-described problem may be solved by forming a reinforcing rib at the rising portion of at least one of the dome portion and the edge portion at the boundary position, and preferably the dome portion, the edge portion and the reinforcing rib are provided. The above-mentioned problems may be solved by forming the diaphragm as an integrally molded product of a plastic film.
【０００８】本発明の電気音響変換器によれば、ドーム
部とエッジ部との境界位置に平坦部を設けているので、
ボイスコイルが接合される接合位置の剛性を高め、ボイ
スコイルの固有共振による振動板の異常振動を抑制する
ことができる。According to the electroacoustic transducer of the present invention, since the flat portion is provided at the boundary position between the dome portion and the edge portion,
The rigidity of the joining position where the voice coil is joined can be increased, and abnormal vibration of the diaphragm due to the natural resonance of the voice coil can be suppressed.
【０００９】また、ドーム部およびエッジ部の少なくと
も一方の立ち上がり部分に補強用リブを形成した場合で
は、剛性をより一層高めてボイスコイルの固有共振によ
る振動板の異常振動を一層確実に抑制することができ、
音響周波数特性を改善して電気音響変換器としての音響
性能を向上させることができる。Further, in the case where the reinforcing rib is formed on the rising portion of at least one of the dome portion and the edge portion, the rigidity is further enhanced and the abnormal vibration of the diaphragm due to the natural resonance of the voice coil is suppressed more reliably. Can
The acoustic performance as an electroacoustic transducer can be improved by improving the acoustic frequency characteristic.
【００１０】[0010]
【発明の実施の形態】以下、図面によって本発明の実施
の形態について、詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１１】図１は、本発明の実施の形態に係る電気音
響変換器の一例である小型スピーカ１の半断面図であ
り、図４の従来例に対応する部分には、同一の参照符号
を付す。この実施の形態に適用される小型スピーカ１
は、好ましくは例えば外径２８ｍｍの小型のスピーカで
あり、フレーム２は中央部分に凹部を有しており、この
中央の凹部内には、その凹部の側壁から所定の距離を隔
ててマグネット３が載置されいる。このマグネット３の
上にはプレート４が固定されている。FIG. 1 is a half cross-sectional view of a small speaker 1 which is an example of an electroacoustic transducer according to an embodiment of the present invention, and portions corresponding to those of the conventional example of FIG. Attach. Small speaker 1 applied to this embodiment
Is preferably a small speaker having an outer diameter of 28 mm, for example, and the frame 2 has a concave portion in the central portion, and the magnet 3 is provided in the central concave portion at a predetermined distance from the side wall of the concave portion. It is placed. A plate 4 is fixed on the magnet 3.
【００１２】振動板５は、好ましくは、例えば、プラス
チックフィルムの成型品で構成され、フレーム２の中央
位置上方に位置して上方にドーム状に膨らんだ形状のド
ーム部６と、そのドーム部６の外周辺においてこの外周
から振動板５の外周までの間で上方に凸状に膨らんだ形
状のエッジ部７とが一体成形されている。そして、ドー
ム部６とエッジ部７との境界位置に、ボイスコイル８の
一端側が接合懸架され、さらにボイスコイル８の他端側
はフレーム２の凹部側壁とマグネット３との間に懸架さ
れている。The diaphragm 5 is preferably made of, for example, a molded plastic film, and is located above the central position of the frame 2 and has a dome-shaped dome portion 6 that bulges upward in a dome shape. An edge portion 7 having a shape that bulges upward in a convex shape is integrally formed between the outer periphery and the outer periphery of the diaphragm 5 on the outer periphery of the. One end side of the voice coil 8 is joined and suspended at the boundary position between the dome portion 6 and the edge portion 7, and the other end side of the voice coil 8 is suspended between the recess side wall of the frame 2 and the magnet 3. .
【００１３】本発明の実施の形態に係るスピーカ１にお
いては、ボイスコイル８の固有共振による振動板５の異
常振動を抑制して音響周波数特性を改善するために、次
のように構成している。The speaker 1 according to the embodiment of the present invention is configured as follows in order to suppress the abnormal vibration of the diaphragm 5 due to the natural resonance of the voice coil 8 and improve the acoustic frequency characteristics. .
【００１４】すなわち、この実施形態のスピーカ１で
は、図２に示されるように、振動板５のドーム部６とエ
ッジ部７との境界位置に沿ってリング状にかつ径方向に
所定の幅を持った平坦な面を有する平坦部９を設けると
ともに、その境界位置に関し平坦部９外縁と内縁に沿う
ドーム部６およびエッジ部７の両者の立ち上がり部分
に、径方向内側と外側のそれぞれには略ギャザー形状
（Ｖ形の折れ目をつけると同時にそれに直角にヒダを付
けて曲がるようにされた形状）とかこれに類似した形状
の補強用リブ６ａ，７ａを形成している。That is, in the speaker 1 of this embodiment, as shown in FIG. 2, a predetermined width is formed in a ring shape along the boundary position between the dome portion 6 and the edge portion 7 of the diaphragm 5 in the radial direction. The flat portion 9 having a flat surface is provided, and with respect to the boundary position, the rising portions of both the dome portion 6 and the edge portion 7 along the outer edge and the inner edge of the flat portion 9 are substantially radially inside and outside respectively. Reinforcing ribs 6a and 7a having a gather shape (a V-shaped fold and a fold at a right angle and a fold at the same time) or a similar shape are formed.
【００１５】この実施の形態の振動板５は、薄膜、好ま
しくは厚みが２５μｍといった薄い膜厚の所定の材料、
好ましくはポリエステルフィルムから成り、ドーム部６
とその周辺の凸状のエッジ部７との間の境界位置に、径
方向所定幅例えば好ましくは幅０.５ｍｍといった幅に
亘る平坦部９を設けている。The diaphragm 5 of this embodiment is a thin film, preferably a predetermined material having a thin film thickness of 25 μm,
The dome portion 6 is preferably made of polyester film.
A flat portion 9 having a predetermined width in the radial direction, for example, a width of preferably 0.5 mm, is provided at a boundary position between the edge portion 7 and the convex edge portion 7 on the periphery thereof.
【００１６】さらに、この平坦部９から立ち上がるドー
ム部６およびエッジ部７の両者に、略ギャザー形状の補
強用リブ６ａ，７ａを、周方向に沿って連続的にそれぞ
れ形成している。Further, reinforcing ribs 6a, 7a having a substantially gather shape are continuously formed along the circumferential direction on both the dome portion 6 and the edge portion 7 rising from the flat portion 9.
【００１７】このように、ドーム部６とエッジ部７との
境界部分に平坦部９を設けるとともに、ドーム部６およ
びエッジ部７の両者に略ギャザー形状の補強用リブ６
ａ，７ａの多数をそれぞれ形成しているので、ボイスコ
イル８の一端側が接合される接合位置での径方向の剛性
を高めることができ、これによって、ボイスコイル８の
固有共振による振動板５の異常振動を抑制して周波数特
性の改善と音響性能を向上させることができる。As described above, the flat portion 9 is provided at the boundary portion between the dome portion 6 and the edge portion 7, and the reinforcing ribs 6 having a substantially gather shape are provided on both the dome portion 6 and the edge portion 7.
Since a large number of a and 7a are respectively formed, the rigidity in the radial direction at the joining position where one end side of the voice coil 8 is joined can be increased, whereby the diaphragm 5 due to the natural resonance of the voice coil 8 is formed. It is possible to suppress abnormal vibration and improve frequency characteristics and acoustic performance.
【００１８】なお、本発明では補強用リブ６ａ，７ａの
形状はギャザー形状であったが、これに限らず、剛性を
高めることができる形状であれば構わない。In the present invention, the shape of the reinforcing ribs 6a, 7a is a gather shape, but the shape is not limited to this and may be any shape that can increase the rigidity.
【００１９】図３は、図１のスピーカ１の周波数特性を
示す図である。FIG. 3 is a diagram showing frequency characteristics of the speaker 1 of FIG.
【００２０】このスピーカ１によれば、図６で示されて
いる従来例の音響周波数特性のように５０００Ｈｚ付近
に発生する著しいディップがないから音響周波数特性が
平坦化されその特性が著しく改善されている。According to the loudspeaker 1, unlike the acoustic frequency characteristic of the conventional example shown in FIG. 6, there is no remarkable dip generated near 5000 Hz, so that the acoustic frequency characteristic is flattened and the characteristic is remarkably improved. There is.
【００２１】なお、本発明の実施の形態においては、補
強用リブ６ａ，７ａを、ドーム部６およびエッジ部７の
両者に形成したけれども、いずれか一方に形成しても構
わない。Although the reinforcing ribs 6a and 7a are formed on both the dome portion 6 and the edge portion 7 in the embodiment of the present invention, they may be formed on either one.
【００２２】さらに、本発明の他の実施の形態として、
補強用リブ６ａ，７ａを省略しても構わない。Furthermore, as another embodiment of the present invention,
The reinforcing ribs 6a and 7a may be omitted.
【００２３】上述の実施の形態では、スピーカに適用し
て説明したけれども、本発明は、スピーカに限らず、ヘ
ッドホン、イヤホン、その他、要するに振動板とボイス
コイルとを備えた電気音響変換器に適用できるのは勿論
である。In the above-described embodiment, the description is applied to the speaker, but the present invention is not limited to the speaker but is applied to headphones, earphones, and in other words, an electroacoustic transducer including a diaphragm and a voice coil. Of course you can.
【００２４】[0024]
【発明の効果】以上のように本発明によれば、振動板の
ドーム部およびエッジ部の境界位置に、平坦部を設けて
いるので、ボイスコイルの一端側が接合される接合位置
の剛性を高めることができ、ボイスコイルの固有共振に
よる振動板の異常振動を抑制することができ、結果、ボ
イスコイルの固有共振による振動板の異常振動を抑制し
てその音響周波数特性を改善できる。また、本発明にお
いてドーム部およびエッジ部の少なくとも一方の立ち上
がり部分に補強用リブを形成した場合には、前記剛性を
より一層高められるから前記音響周波数特性を改善して
電気音響変換器としての音響性能を著しく向上させるこ
とができる。As described above, according to the present invention, since the flat portion is provided at the boundary position between the dome portion and the edge portion of the diaphragm, the rigidity of the joining position where one end side of the voice coil is joined is increased. Therefore, the abnormal vibration of the diaphragm due to the natural resonance of the voice coil can be suppressed, and as a result, the abnormal vibration of the diaphragm due to the natural resonance of the voice coil can be suppressed and the acoustic frequency characteristic thereof can be improved. Further, in the present invention, when the reinforcing rib is formed at the rising portion of at least one of the dome portion and the edge portion, the rigidity can be further enhanced, so that the acoustic frequency characteristic is improved and the acoustic as an electroacoustic transducer is improved. The performance can be significantly improved.
【図１】本発明の実施の形態に係るスピーカの半断面図
である。FIG. 1 is a half sectional view of a speaker according to an embodiment of the present invention.
【図２】図１のスピーカの振動板を示す図であり、
（Ａ）は平面図、（Ｂ）は半断面図である。2 is a diagram showing a diaphragm of the speaker shown in FIG.
(A) is a plan view and (B) is a half sectional view.
【図３】図１のスピーカの周波数特性図である。FIG. 3 is a frequency characteristic diagram of the speaker of FIG.
【図４】従来例のスピーカの半断面図である。FIG. 4 is a half sectional view of a conventional speaker.
【図５】従来例の振動板を示す図であり、（Ａ）は平面
図、（Ｂ）は半断面図である。5A and 5B are diagrams showing a diaphragm of a conventional example, in which FIG. 5A is a plan view and FIG. 5B is a half sectional view.
【図６】従来例のスピーカの周波数特性図である。FIG. 6 is a frequency characteristic diagram of a conventional speaker.
１，１0 スピーカ ５，５0 振動板 ６，６0 ドーム部 ７，７0 エッジ部 ８ ボイスコイル ９ 平坦部 ６ａ，７ａ 補強用リブ1,1 0 speaker 5,5 0 diaphragm 6,6 0 dome part 7,7 0 edge part 8 voice coil 9 flat part 6a, 7a reinforcing rib
Claims (3)
板を備え、前記ドーム部と前記エッジ部との境界位置に
ボイスコイルの一端側が懸架されてなる電気音響変換器
において、前記振動板における前記境界位置に平坦部を
設けたことを特徴とする電気音響変換器。1. An electroacoustic transducer in which a diaphragm having an edge portion around a dome portion is provided, and one end side of a voice coil is suspended at a boundary position between the dome portion and the edge portion. An electroacoustic transducer, characterized in that a flat portion is provided at the boundary position in.
び前記エッジ部の少なくともいずれか一方の立ち上がり
部分に、補強用リブを形成した請求項１記載の電気音響
変換器。2. The electroacoustic transducer according to claim 1, wherein a reinforcing rib is formed at a rising portion of at least one of the dome portion and the edge portion at the boundary position.
補強用リブが、プラスチックフィルムの一体成型品から
なる請求項１または２記載の電気音響変換器。3. The electroacoustic transducer according to claim 1, wherein the dome portion, the edge portion, and the reinforcing rib are made of an integrally molded plastic film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28978095A JPH09135491A (en) | 1995-11-08 | 1995-11-08 | Electroacoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28978095A JPH09135491A (en) | 1995-11-08 | 1995-11-08 | Electroacoustic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09135491A true JPH09135491A (en) | 1997-05-20 |
Family
ID=17747673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28978095A Pending JPH09135491A (en) | 1995-11-08 | 1995-11-08 | Electroacoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09135491A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003521185A (en) * | 2000-01-27 | 2003-07-08 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electroacoustic transducer having a diaphragm with coil mounting protrusions and a stabilizing wall disposed therebetween |
| JP2005333321A (en) * | 2004-05-19 | 2005-12-02 | Pioneer Electronic Corp | Speaker device and method for manufacturing magnesium edge therefor |
| JP2006166070A (en) * | 2004-12-08 | 2006-06-22 | Matsushita Electric Ind Co Ltd | Speaker |
| WO2010084575A1 (en) * | 2009-01-20 | 2010-07-29 | パイオニア株式会社 | Speaker device and electronic device |
| US8199962B2 (en) | 2007-08-29 | 2012-06-12 | Onkyo Corporation | Loudspeaker diaphragm and loudspeaker using the same |
| CN106507256A (en) * | 2016-12-05 | 2017-03-15 | 歌尔丹拿音响有限公司 | The speaker diaphragm and loudspeaker of cone basin formula |
| CN106507255A (en) * | 2016-12-05 | 2017-03-15 | 歌尔丹拿音响有限公司 | The speaker diaphragm and loudspeaker of cone basin formula |
| US20190289401A1 (en) * | 2018-03-15 | 2019-09-19 | Onkyo Corporation | Diaphragm, speaker unit using same, headphone and earphone, and diaphragm manufacturing method |
-
1995
- 1995-11-08 JP JP28978095A patent/JPH09135491A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003521185A (en) * | 2000-01-27 | 2003-07-08 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Electroacoustic transducer having a diaphragm with coil mounting protrusions and a stabilizing wall disposed therebetween |
| JP4876293B2 (en) * | 2000-01-27 | 2012-02-15 | ノウルズ、エレクトロニクス、アジア、プライベート、リミテッド | Electroacoustic transducer having a diaphragm with a coil mounting protrusion and a stabilizing wall disposed therebetween |
| JP2005333321A (en) * | 2004-05-19 | 2005-12-02 | Pioneer Electronic Corp | Speaker device and method for manufacturing magnesium edge therefor |
| JP2006166070A (en) * | 2004-12-08 | 2006-06-22 | Matsushita Electric Ind Co Ltd | Speaker |
| US8199962B2 (en) | 2007-08-29 | 2012-06-12 | Onkyo Corporation | Loudspeaker diaphragm and loudspeaker using the same |
| WO2010084575A1 (en) * | 2009-01-20 | 2010-07-29 | パイオニア株式会社 | Speaker device and electronic device |
| CN106507256A (en) * | 2016-12-05 | 2017-03-15 | 歌尔丹拿音响有限公司 | The speaker diaphragm and loudspeaker of cone basin formula |
| CN106507255A (en) * | 2016-12-05 | 2017-03-15 | 歌尔丹拿音响有限公司 | The speaker diaphragm and loudspeaker of cone basin formula |
| WO2018103310A1 (en) * | 2016-12-05 | 2018-06-14 | 歌尔丹拿音响有限公司 | Cone-shaped speaker diaphragm and speaker |
| US20190289401A1 (en) * | 2018-03-15 | 2019-09-19 | Onkyo Corporation | Diaphragm, speaker unit using same, headphone and earphone, and diaphragm manufacturing method |
| US10805735B2 (en) * | 2018-03-15 | 2020-10-13 | Onkyo Corporation | Diaphragm, speaker unit using same, headphone and earphone, and diaphragm manufacturing method |
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