JP3156538B2 - Speaker - Google Patents
SpeakerInfo
- Publication number
- JP3156538B2 JP3156538B2 JP06271995A JP6271995A JP3156538B2 JP 3156538 B2 JP3156538 B2 JP 3156538B2 JP 06271995 A JP06271995 A JP 06271995A JP 6271995 A JP6271995 A JP 6271995A JP 3156538 B2 JP3156538 B2 JP 3156538B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- voice coil
- vibration
- thin plate
- peripheral 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.)
- Expired - Lifetime
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、細幅かつ音質の優れた
スピーカに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker having a narrow width and excellent sound quality.
【０００２】[0002]
【従来の技術】近年、ハイビジョンやワイドビジョン等
の普及により、テレビの画面は横長ののものが一般的に
なりつつある。しかし一方では、我が国の住宅事情か
ら、テレビセット全体として狭幅・薄型のものが望まれ
ている。2. Description of the Related Art In recent years, with the widespread use of high-definition televisions and wide-vision televisions, television screens have become generally landscape. On the other hand, however, due to the housing situation in Japan, narrow and thin TV sets are desired as a whole.
【０００３】テレビ用のスピーカユニットは、通常ブラ
ウン管の両脇に取り付けられるため、テレビセットの横
幅を大きくする一因となっている。そのため、従来から
テレビ用には角型や楕円型等の幅の狭いスピーカユニッ
トが用いられてきた。ブラウン管の横長化により、スピ
ーカユニットの幅はますます狭くすることが求められ、
同時に画面の高画質化に対応した音声の高音質化が要求
されている。[0003] Since a speaker unit for a television is usually mounted on both sides of a cathode ray tube, it contributes to increase the width of the television set. For this reason, a narrow speaker unit such as a square or an ellipse has conventionally been used for a television. As the cathode ray tube becomes longer, the width of the speaker unit must be further reduced.
At the same time, there is a demand for higher sound quality of audio corresponding to higher image quality of the screen.
【０００４】しかしながら、一般的な細長構造のスピー
カでは、細長の振動板の中央部を一点で駆動することに
なるため、長軸方向の分割共振が励起されやすい。その
結果中高音帯域では再生音圧周波数特性上にピークディ
ップを生じ、音質の劣化をまねいていた。However, in a general loudspeaker having an elongated structure, the central portion of an elongated diaphragm is driven at a single point, and thus split resonance in the long axis direction is easily excited. As a result, a peak dip occurs in the reproduced sound pressure frequency characteristic in the middle and high frequency band, which results in deterioration of sound quality.
【０００５】同時にボイスコイルの支持機構（ダンパ
ー）は、細長構造をとるために、曲率半径を小さくする
必要があり、振動系のスチフネスを大きくしていた。こ
の結果、最低共振周波数ｆ0が上昇し、低音域の再生が
困難であった。At the same time, the support mechanism (damper) for the voice coil needs to have a small radius of curvature in order to have a slender structure, thereby increasing the stiffness of the vibration system. As a result, the lowest resonance frequency f 0 has increased, and it has been difficult to reproduce low-frequency sounds.
【０００６】このような問題に鑑みて、本特許出願人
は、特願平６−１１０３４０号において、上記問題点を
解消し、細幅（細長）構造でありながら、分割共振が起
こりにくく平坦な特性が得られ、ｆ0を低く抑えて低音
域の再生を可能とした、音質の優れたスピーカを提案し
ている。In view of such a problem, the present applicant has solved the above-mentioned problem in Japanese Patent Application No. 6-110340, and has a flat structure in which split resonance is less likely to occur while having a narrow (elongated) structure. characteristics are obtained by suppressing the f 0 to permit reproduction of the bass range, it proposes an excellent speaker sound quality.
【０００７】以下、上記した細幅のスピーカユニットの
構成について、図面を参照しながら説明する。Hereinafter, the configuration of the above-described narrow speaker unit will be described with reference to the drawings.
【０００８】図１８は上述したスピーカユニットの分解
斜視図である。１は振動方向から見た平面形状が、長径
と短径を有し音を放射する方向に凸状に湾曲した非軸対
称形の振動板である。この振動板１の外周部にはエッジ
２が接合されフレーム３に保持されている。振動板１の
外周部下端にはボイスコイルボビン４が固着されてい
る。このボイスコイルボビン４の外周面にはボイスコイ
ル５が回巻されている。ボイスコイルボビン４の内部に
は、振動板１の短径方向に関して互いに対向する面の間
を、振動板１の振動方向と平行で且つ該対向面と直角に
架張する薄板状連結部材１２が取り付けられている。薄
板状連結部材１２の下端はボイスコイルボビン５の下端
より下方に延長され端部にダンパー１３が取り付けら
れ、フレーム３に固着されている。ボイスコイル５は磁
気回路６の磁気空隙７に釣り下げられ音声信号電流と磁
束により駆動力を発生する。フレーム３は箱状に構成さ
れ、その側面はエッジ２に沿っている。フレーム３の底
面には磁気回路６が取り付けられている。磁気回路６は
ヨーク８、磁石９プレート１０で構成される。磁気回路
６は連結部材を通すための空隙１１を隔てて、かつ磁気
空隙７が一直線上に成るように複数個フレーム３に取り
付けられている。FIG. 18 is an exploded perspective view of the above-described speaker unit. Reference numeral 1 denotes a non-axially symmetric diaphragm whose planar shape viewed from the vibration direction has a major axis and a minor axis and is curved in a convex shape in a direction in which sound is emitted. An edge 2 is joined to an outer peripheral portion of the diaphragm 1 and is held by a frame 3. A voice coil bobbin 4 is fixed to a lower end of an outer peripheral portion of the diaphragm 1. A voice coil 5 is wound around the outer peripheral surface of the voice coil bobbin 4. Inside the voice coil bobbin 4, a thin plate-like connecting member 12 extending between surfaces facing each other in the minor axis direction of the diaphragm 1 in parallel with the vibration direction of the diaphragm 1 and at right angles to the facing surface is attached. Have been. The lower end of the thin plate-like connecting member 12 extends below the lower end of the voice coil bobbin 5, and a damper 13 is attached to the end, and is fixed to the frame 3. The voice coil 5 is suspended by the magnetic gap 7 of the magnetic circuit 6 and generates a driving force by a voice signal current and a magnetic flux. The frame 3 is formed in a box shape, and its side faces are along the edge 2. A magnetic circuit 6 is attached to the bottom surface of the frame 3. The magnetic circuit 6 includes a yoke 8, a magnet 9, and a plate 10. A plurality of magnetic circuits 6 are mounted on the frame 3 with a gap 11 for passing the connecting member therebetween and such that the magnetic gap 7 is aligned.
【０００９】さらに振動板１の短径方向に、振動板の内
側と接合される円弧状に形成された、複数の薄板状補強
部材１４が長径方向に等間隔Ｌで配置されている。図１
９は振動板１と薄板状補強部材１４の構成を示す斜視図
である。５個の薄板状補強部材１４が振動板内周面上に
短径方向に接合されている。薄板状連結部材１２の取付
間隔は、振動板１の長径方向に対して等間隔な長さであ
る。Further, a plurality of thin plate-like reinforcing members 14 formed in an arc shape and joined to the inside of the diaphragm are arranged at equal intervals L in the major axis direction in the minor axis direction of the diaphragm 1. FIG.
9 is a perspective view showing the configuration of the diaphragm 1 and the thin plate-like reinforcing member 14. Five thin plate-like reinforcing members 14 are joined on the inner peripheral surface of the diaphragm in the minor diameter direction. The attachment intervals of the thin plate-shaped connecting members 12 are equal in length in the major axis direction of the diaphragm 1.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、上記の
構成のスピーカにおいては、次のような問題点があっ
た。振動板の駆動周波数が高くなると、短径方向や、薄
板状補強部材で構成される小面積部分で分割共振が生
じ、周波数特性が乱れる。この薄板状補強部材で分割構
成される小面積の大きさが同じであれば分割共振周波数
は等しく、共振による音圧周波数特性の乱れは増幅され
るという問題があった。However, the speaker having the above configuration has the following problems. When the driving frequency of the diaphragm is increased, split resonance occurs in the minor diameter direction or in a small area formed by the thin plate-like reinforcing member, and the frequency characteristics are disturbed. If the small areas divided by the thin plate-shaped reinforcing members have the same size, the divided resonance frequencies are equal, and there is a problem that the disturbance of the sound pressure frequency characteristics due to resonance is amplified.
【００１１】また、細幅（細長）構造のスピーカに使用
する直方体形状の磁石では、短径方向のプレートとヨー
クの間隔が接近しているため、磁束は空気中に漏洩し易
く、駆動力が小さくなるという問題があった。In a rectangular parallelepiped magnet used for a speaker having a narrow (elongated) structure, since the distance between the plate and the yoke in the short diameter direction is close to each other, the magnetic flux easily leaks into the air, and the driving force is reduced. There was a problem of becoming smaller.
【００１２】また、支持系のロールの形状に起因する振
幅特性の非線形性のため、大振幅時における歪みが多く
なる問題があった。特に低音域での音質の劣化を招く。Further, there is a problem that distortion at the time of large amplitude increases due to the non-linearity of the amplitude characteristic caused by the shape of the roll of the support system. In particular, the sound quality is degraded in the low frequency range.
【００１３】また、ダンパー１３と薄板状連結部材１２
とを線接触で接着しているため接着面積が少なく、長時
間の使用で接着不良が発生し易くなり、信頼性を高める
ことが困難であった。The damper 13 and the thin plate-like connecting member 12
And are bonded by line contact, so that the bonding area is small, and it is easy to cause poor bonding when used for a long time, and it has been difficult to enhance the reliability.
【００１４】また、負荷や駆動力のアンバランスが発生
した場合、振動板の縦横比が大きいため長径方向のモー
メントが大きくなり、この方向にローリングを生じやす
くなる。振動板が長径方向にローリングを起こすと、ロ
ーリングの程度によっては、支持系の振幅限界に近づく
ため、大振幅時の歪みが多くなる問題があった。Further, when an imbalance in load or driving force occurs, the moment in the major axis direction increases due to the large aspect ratio of the diaphragm, and rolling in this direction tends to occur. When the diaphragm rolls in the major axis direction, it approaches the amplitude limit of the support system depending on the degree of rolling, so that there is a problem that distortion at the time of large amplitude increases.
【００１５】振動板の縦横比を大きくした場合、ボイス
コイルの平行な直線部分が長くなる。この場合、いくつ
かの特定の周波数（共振周波数）において、ボイスコイ
ルボビンの直線部分が共振し、振動板の振動方向とは直
角の方向（ボイスコイルボビンを駆動する磁気回路の、
磁気ギャップ内での磁束の方向）に振動する。共振周波
数は直線部分が長くなるに従って低くなり、共振の振幅
は共振周波数が低くなるに従って増大する。従って、振
動板の縦横比が大きいほど、ボイスコイルボビンの共振
振幅は大きくなる。スピーカに加える入力が大きくなる
と、この共振振幅も大きくなり、ボイスコイルが磁気回
路に接触する可能性がある。When the aspect ratio of the diaphragm is increased, the length of the parallel straight line portion of the voice coil becomes longer. In this case, at some specific frequencies (resonance frequencies), the linear portion of the voice coil bobbin resonates, and the direction perpendicular to the vibration direction of the diaphragm (the magnetic circuit that drives the voice coil bobbin,
(The direction of the magnetic flux in the magnetic gap). The resonance frequency decreases as the length of the linear portion increases, and the amplitude of resonance increases as the resonance frequency decreases. Therefore, the resonance amplitude of the voice coil bobbin increases as the aspect ratio of the diaphragm increases. As the input applied to the speaker increases, the resonance amplitude also increases, and the voice coil may come into contact with the magnetic circuit.
【００１６】[0016]
【課題を解決するための手段】本願の請求項１記載の発
明は、振動方向から見た平面形状が長径と短径を有する
非軸対称形であって、音を放射する方向に凸状に湾曲さ
せた振動板の短径方向に、振動板の内面と接合する複数
の円弧状薄板状補強部材を、振動板の長径方向に対して
不等間隔に配置したことを特徴とするスピーカである。According to the first aspect of the present invention, the planar shape viewed from the vibration direction is a non-axially symmetrical shape having a major axis and a minor axis, and is convex in the direction in which sound is emitted. A speaker characterized in that a plurality of arc-shaped thin plate-like reinforcing members joined to the inner surface of the diaphragm are arranged at irregular intervals in the major axis direction of the diaphragm in the minor axis direction of the curved diaphragm. .
【００１７】[0017]
【００１８】本願の請求項２記載の発明は、振動方向か
ら見た平面形状が、長径と短径を有し音を放射する方向
に凸状に湾曲した非軸対称形の振動板と、振動板の外周
部に沿って帯状に形成される断面が円弧状のロールから
なるエッジと、エッジとともに振動系を支持する断面が
円弧状のロールからなるダンパーを具備し、エッジとダ
ンパーの円弧状断面の凸方向が相対向する様にしたダン
パーを具備したことを特徴とするスピーカである。According to a second aspect of the present invention, there is provided a non-axially symmetric diaphragm whose planar shape viewed from the vibration direction has a major axis and a minor axis and is curved in a convex shape in a direction in which sound is emitted. An edge formed in a belt shape along the outer peripheral portion of the plate is formed by an arc-shaped roll, and a damper is formed by an arc-shaped roll having a cross section that supports a vibration system together with the edge. The arc-shaped cross section of the edge and the damper Characterized by comprising a damper whose convex directions are opposed to each other.
【００１９】また本願の請求項３記載の発明は、振動方
向から見た平面形状が、長径と短径を有し音を放射する
方向に凸状に湾曲した非軸対称形の振動板と、振動板を
振動自在に保持するエッジと、振動板に接続されたボイ
スコイルボビンと、ボイスコイルボビンの外周面に回巻
されたボイスコイルと、ボイスコイルに振動用の磁束を
与える磁気回路とボイスコイルボビンの、振動板の短径
方向に関して互いに対向する面の間を、前記振動板の振
動方向と平行で且つ該対向面と直角に架張する薄板状連
結部材と、前記振動板を振動方向に自由自在に保持する
連結部材の下端に固着されたダンパーとを具備し、ダン
パーは薄板状連結部材を保持する凹部を具備することを
特徴とするスピーカである。According to the third aspect of the present invention, there is provided a non-axially symmetric diaphragm whose planar shape viewed from the vibration direction has a major axis and a minor axis and is curved in a convex shape in a direction in which sound is emitted. An edge for holding the diaphragm so as to freely vibrate, a voice coil bobbin connected to the diaphragm, a voice coil wound around the outer peripheral surface of the voice coil bobbin, a magnetic circuit for applying a magnetic flux for vibration to the voice coil, and a voice coil bobbin. A thin plate-like connecting member extending between the surfaces facing each other in the minor axis direction of the diaphragm parallel to the vibration direction of the diaphragm and perpendicular to the facing surface; and freely moving the diaphragm in the vibration direction. And a damper fixed to a lower end of the connecting member for holding the thin plate-shaped connecting member.
【００２０】また本願の請求項４記載の発明は、断面が
円弧状の２対のロールが直交するように配置したダンパ
ーを具備することを特徴とする。The invention according to claim 4 of the present application is characterized in that a damper in which two pairs of rolls each having an arc-shaped cross section are arranged so as to be orthogonal to each other.
【００２１】また本願の請求項５記載発明は、厚さ方向
に補強リブが配置された薄板状連結部材を具備すること
を特徴とする。According to a fifth aspect of the present invention, there is provided a thin plate-like connecting member having reinforcing ribs arranged in a thickness direction.
【００２２】また本願の請求項６記載の発明は、高分子
発泡体などの面密度の小さい材料を心材とし、その両側
をアルミやチタンなどの軽量高剛性材料の薄箔でサンド
イッチ構造とした薄板状連結部材を具備したことを特徴
とする。The invention according to claim 6 of the present application is a thin plate having a core material made of a material having a low areal density, such as a polymer foam, and a sandwich structure made of a thin foil of a lightweight and highly rigid material such as aluminum or titanium on both sides thereof. Characterized in that it has a shape-like connecting member.
【００２３】また本願の請求項７記載の発明は、振動方
向から見た平面形状が長径と短径を有し、音を放射する
方向に凸状に湾曲した非軸対称形の振動板と、振動板の
外周部に沿って帯状に形成され、該帯状の内周部が前記
振動板の外周部に接続され、前記振動板を振動自在に保
持するエッジと、振動板に接続され、平面形状が長径と
短径とを有する非軸対称形であって、かつ振動板の長径
方向に関して、互いに平行な直線部分を成し終端部は円
弧で連結したボイスコイルボビンと、ボイスコイルボビ
ンの外周面に回巻されたボイスコイルと、ボイスコイル
に振動用の磁束を与える磁気回路と、ボイスコイルボビ
ンの、前記振動板の短径方向に関して互いに対向する面
の間を、前記振動板の振動方向と平行で且つ該対向面と
直角に架張する少なくとも３個以上の薄板状連結部材と
を具備し、薄板状連結部材一対は、ボイスコイルの直線
部分と円弧部分の連結部近傍に配置したことを特徴とす
る。According to a seventh aspect of the present invention, there is provided a non-axially symmetric diaphragm which has a major axis and a minor axis when viewed in the vibration direction, and which is convexly curved in a direction in which sound is emitted. A planar shape formed in a band shape along the outer peripheral portion of the diaphragm, the band-shaped inner peripheral portion being connected to the outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely, and being connected to the diaphragm; Is a non-axially symmetric shape having a major axis and a minor axis, and forms a linear portion parallel to each other with respect to the major axis direction of the diaphragm, and has a terminal portion connected to an outer peripheral surface of the voice coil bobbin by an arc. The wound voice coil, a magnetic circuit that applies a magnetic flux for vibration to the voice coil, and a voice coil bobbin between surfaces facing each other with respect to the minor axis direction of the diaphragm, are parallel to the vibration direction of the diaphragm and A small number that extends at right angles to the facing surface ; And a Kutomo three or more thin plate connecting member, a thin plate-like coupling member pair is characterized in that arranged on the connecting portion near the straight line portion and the arc portion of the voice coil.
【００２４】[0024]
【作用】この様な特徴を有する本願の請求項１記載の発
明によれば、複数の薄板状補強部材によって、振動板を
長径方向に対して不等間隔に分割補強し、分割した振動
板ブロックの大きさが異なるため、それぞれの部分の分
割共振周波数を変えることができる。このため、１つの
部分ではピークになる場合に他の部分は共振していない
かディップになるように補強する大きさを選ぶことによ
り、それぞれが同じ周波数で共振する場合に比べ、分割
共振による音圧周波数特性のピークディップを少なくす
ることができる。According to the first aspect of the present invention having such features, the diaphragm is divided and reinforced at irregular intervals in the major axis direction by the plurality of thin plate-like reinforcing members, and the divided diaphragm block is provided. Are different, the split resonance frequency of each part can be changed. For this reason, when one part reaches a peak, the other part does not resonate, or by selecting a size to reinforce it so as to form a dip, the sound by split resonance is compared with the case where each resonates at the same frequency. The peak dip of the pressure frequency characteristic can be reduced.
【００２５】[0025]
【００２６】また本願の請求項２記載の発明によれば、
ダンパーとエッジのロールの円弧状断面の凸形形状を相
対させているため、支持系の断面形状による振幅特性の
非線形性を少なくすることができる。According to the invention of claim 2 of the present application,
Since the convex shapes of the arc-shaped cross section of the damper and the roll of the edge are opposed to each other, the nonlinearity of the amplitude characteristic due to the cross-sectional shape of the support system can be reduced.
【００２７】また本願の請求項３記載の発明によれば、
ダンパーに接着しろを設けることにより、接着面積が増
加し信頼性を高めることができる。According to the invention of claim 3 of the present application,
By providing a margin for bonding to the damper, the bonding area increases, and the reliability can be improved.
【００２８】また本願の請求項４記載の発明によれば、
ダンパーの２対のロールを振動板の短径方向と長径方向
に平行になるように直交させることにより、駆動力や負
荷のアンバランスによる異常振動を防ぐことができる。According to the invention described in claim 4 of the present application,
By arranging the two pairs of rolls of the damper at right angles so as to be parallel to the minor axis direction and major axis direction of the diaphragm, abnormal vibration due to imbalance in driving force or load can be prevented.
【００２９】また本願の請求項５、６記載の発明によれ
ば、厚み方向に剛性を高めた薄板状連結部材を具備する
ことで、駆動力や負荷のアンバランスによる異常振動を
防ぐことができる。According to the fifth and sixth aspects of the present invention, by providing the thin plate-like connecting member having increased rigidity in the thickness direction, it is possible to prevent abnormal vibration due to imbalance in driving force and load. .
【００３０】また本願の請求項７記載の発明によれば、
ボイスコイルボビンの補強ができ、ボイスコイルの平行
な直線部分の共振の影響を少なくすることができる。According to the invention of claim 7 of the present application,
The voice coil bobbin can be reinforced, and the effect of resonance of the parallel straight portion of the voice coil can be reduced.
【００３１】[0031]
【実施例】以下に、本発明の実施例を示す図面に基づい
て説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００３２】図１は、本発明にかかる、第１の実施例の
スピーカの分解構成図である。１は振動方向から見た平
面形状が、長径と短径を有し音を放射する方向に凸状に
湾曲した非軸対称形の振動板である。この振動板１の外
周部にはエッジ２が接合されフレーム３に保持されてい
る。振動板１の外周部下端にはボイスコイルボビン４が
固着されている。このボイスコイルボビン４の外周面に
はボイスコイル５が回巻されている。振動板１の振動方
向から見たボイスコイルボビン４の平面形状は、長径と
短径とを有する非軸対称形であって、かつボイスコイル
ボビンの一部は、振動板の長径方向に関して互いに平行
な直線部分を成す。ボイスコイルボビン４の内部には、
振動板１の短径方向に関して互いに対向する面の間を、
振動板１の振動方向と平行で且つ該対向面と直角に架張
する薄板状連結部材１２が取り付けられている。薄板状
連結部材１２の下端はボイスコイルボビン５の下端より
下方に延長される。そして下端部にダンパー１３が取り
付けられ、フレーム３に固着されている。FIG. 1 is an exploded view of a speaker according to a first embodiment of the present invention. Reference numeral 1 denotes a non-axially symmetric diaphragm whose planar shape viewed from the vibration direction has a major axis and a minor axis and is curved in a convex shape in a direction in which sound is emitted. An edge 2 is joined to an outer peripheral portion of the diaphragm 1 and is held by a frame 3. A voice coil bobbin 4 is fixed to a lower end of an outer peripheral portion of the diaphragm 1. A voice coil 5 is wound around the outer peripheral surface of the voice coil bobbin 4. The planar shape of the voice coil bobbin 4 seen from the vibration direction of the diaphragm 1 is a non-axially symmetric shape having a major axis and a minor axis, and a part of the voice coil bobbin is a straight line parallel to the major axis direction of the diaphragm. Make a part. Inside the voice coil bobbin 4,
Between the surfaces facing each other in the minor axis direction of the diaphragm 1,
A thin plate-like connecting member 12 extending parallel to the vibration direction of the diaphragm 1 and perpendicular to the facing surface is attached. The lower end of the thin plate-like connecting member 12 extends below the lower end of the voice coil bobbin 5. A damper 13 is attached to the lower end, and is fixed to the frame 3.
【００３３】ボイスコイル５は磁気回路６の磁気空隙７
に釣り下げられ、音声信号電流と磁束により駆動力を発
生する。フレーム３は箱状に構成され、その側面はエッ
ジ２に沿っている。フレーム３の底面には磁気回路６が
取り付けられている。磁気回路６はコ字型に形成された
ヨーク８、磁石９、プレート１０で構成される。磁気回
路６は薄板状連結部材１２を通すための空隙１１を隔て
て、かつ磁気ギャップ７が一直線上に成るように複数個
フレーム３に取り付けられている。さらに円弧状に形成
された複数の薄板状補強部材１４が、振動板１の短径方
向に、振動板１の内面と接合されている。The voice coil 5 is provided with a magnetic gap 7 of a magnetic circuit 6.
And generates a driving force by the voice signal current and the magnetic flux. The frame 3 is formed in a box shape, and its side faces are along the edge 2. A magnetic circuit 6 is attached to the bottom surface of the frame 3. The magnetic circuit 6 includes a yoke 8, a magnet 9, and a plate 10 formed in a U-shape. A plurality of magnetic circuits 6 are mounted on the frame 3 with a gap 11 for passing the thin plate-like connecting member 12 therebetween and with the magnetic gaps 7 being aligned. Further, a plurality of thin plate-shaped reinforcing members 14 formed in an arc shape are joined to the inner surface of the diaphragm 1 in the short diameter direction of the diaphragm 1.
【００３４】図２（ａ）（ｂ）は振動板１と薄板状補強
部材１４の構成を示す平面図と正面図である。短径方向
に配置した５個の薄板状補強部材１４が振動板１の内面
上に接合されている。薄板状補強部材１４の取付間隔
は、振動板１の長径方向に対して不等間隔に配置した構
成である。図２（ａ）ではＬ１≠Ｌ２である。さらに図
２（ｃ）に示すように、薄板状補強部材１４と薄板状連
結部材１２を結合させてスピーカを構成してもよい。FIGS. 2A and 2B are a plan view and a front view showing the structure of the diaphragm 1 and the thin plate-like reinforcing member 14, respectively. Five thin plate reinforcing members 14 arranged in the minor diameter direction are joined on the inner surface of the diaphragm 1. The intervals at which the thin plate-shaped reinforcing members 14 are attached are arranged at unequal intervals in the major axis direction of the diaphragm 1. In FIG. 2A, L1 ≠ L2. Further, as shown in FIG. 2C, the speaker may be configured by connecting the thin plate-shaped reinforcing member 14 and the thin plate-shaped connecting member 12.
【００３５】このように構成したスピーカの動作につい
て説明する。振動板の駆動周波数が高くなると、短径方
向や薄板状補強部材１４で分割される小面積部分で分割
共振が生じ、周波数特性が乱れる。この薄板状補強部材
１４で分割構成される振動板の小面積の大きさが同じで
あれば共振周波数は等しく、共振による音圧周波数特性
の乱れは増幅される。The operation of the thus constructed speaker will be described. When the driving frequency of the diaphragm increases, split resonance occurs in the short diameter direction or in a small area portion divided by the thin plate-shaped reinforcing member 14, and the frequency characteristics are disturbed. If the diaphragms divided by the thin plate-shaped reinforcing member 14 have the same small area, the resonance frequencies are equal, and the disturbance of the sound pressure frequency characteristics due to resonance is amplified.
【００３６】しかしながら、本実施例ではこの小面積部
の長さを異ならせることにより、各々の小面積部での共
振周波数を変化させることができる。このため、分割共
振による音圧周波数の乱れは、ある部分ではピークにな
る場合に、他の部分ではディップや平坦な特性が得られ
る構成とすることができる。このため、分割共振の影響
は分散され、音圧周波数特性の乱れを少なくすることが
できる。However, in the present embodiment, the resonance frequency in each small area can be changed by making the length of the small area different. For this reason, the disturbance of the sound pressure frequency due to the split resonance can be configured such that when a certain portion has a peak, a dip or flat characteristic can be obtained in another portion. Therefore, the influence of the split resonance is dispersed, and the disturbance of the sound pressure frequency characteristics can be reduced.
【００３７】次に、本発明の第２の実施例のスピーカに
ついて、図面を参照しながら説明する。Next, a speaker according to a second embodiment of the present invention will be described with reference to the drawings.
【００３８】図３は第２の実施例のスピーカ構造を示す
断面図である。図４は本実施例の磁気回路１６を示す斜
視図である。なお、図１のスピーカと同一な部分は同一
な符号をつけ、説明を省略する。FIG. 3 is a sectional view showing the speaker structure of the second embodiment. FIG. 4 is a perspective view showing the magnetic circuit 16 of the present embodiment. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００３９】図４に示すように、磁気回路１６は、断面
がコの字状のヨーク８上に磁石９が固着され、磁石９に
はプレート１０が接着され、プレート１０とヨーク８と
で直線状のギャップ７を構成する。プレート１０上に
は、磁石９と振動板の振動方向に対して、逆極性に着磁
された補助マグネット１５が固着されている。磁気回路
１６はまた図５の様に、ヨーク８上に補助プレート１７
を設けた構成でも実現できる。As shown in FIG. 4, the magnetic circuit 16 has a magnet 9 fixed on a yoke 8 having a U-shaped cross section, a plate 10 adhered to the magnet 9, and a straight line formed by the plate 10 and the yoke 8. The gap 7 has a shape of a circle. On the plate 10, an auxiliary magnet 15 magnetized in the opposite polarity to the magnet 9 and the vibration direction of the diaphragm is fixed. The magnetic circuit 16 also has an auxiliary plate 17 on the yoke 8 as shown in FIG.
Can also be realized.
【００４０】補助磁石１５は薄板状補強部材１４が振動
する際に当たらないように２つに分割している。振動板
の最大振幅が小さく、薄板状補強部材１４が補助磁石に
接触しない場合は連続した１つの磁石で構成する。The auxiliary magnet 15 is divided into two so that the thin plate-shaped reinforcing member 14 does not hit when vibrating. When the maximum amplitude of the diaphragm is small and the thin plate-shaped reinforcing member 14 does not contact the auxiliary magnet, the diaphragm is constituted by one continuous magnet.
【００４１】図６（ａ）（ｂ）は補助磁石１５の有無に
よる磁気漏洩分布を計算した結果である。図６（ａ）は
補助磁石１５が無い場合、同図（ｂ）は補助磁石１５を
取り付けた場合である。磁気空隙７のギャップ長が２ｍ
ｍ、プレート１０、ヨーク８の厚さが４ｍｍ、フェライ
ト磁石の大きさが高さ１０ｍｍ、幅２０ｍｍの場合で
は、図６（ａ）の磁束密度は4546(gauss）であった。一
方、高さ５ｍｍ、幅１５ｍｍの補助磁石を取り付けた図
６（ｂ）では5112(gauss)となった。なお、磁気空隙７
を通る磁束は、空隙内の磁束密度が高く、同一レベルで
は表示ができないため省略している。細幅（細長）構造
のスピーカに使用する直方体形状の磁石では、短径方向
のプレートとヨークの間隔が接近しているため、磁束は
空気中に漏洩し易い。両図を比較すると明らかなよう
に、補助磁石１５によって空気中の漏洩磁束が減少し、
磁束は磁気空隙７を通過するようになることがわかる。
このように第２の実施例の磁気回路構成にすることによ
り、振動板の駆動力を一層高め、効率良く再生すること
ができる。FIGS. 6A and 6B show the results of calculating the magnetic leakage distribution with and without the auxiliary magnet 15. FIG. FIG. 6A shows a case where the auxiliary magnet 15 is not provided, and FIG. 6B shows a case where the auxiliary magnet 15 is attached. The gap length of the magnetic gap 7 is 2 m
6A, the thickness of the plate 10, the thickness of the yoke 8 was 4 mm, and the size of the ferrite magnet was 10 mm in height and 20 mm in width. The magnetic flux density in FIG. 6A was 4546 (gauss). On the other hand, in FIG. 6B in which an auxiliary magnet having a height of 5 mm and a width of 15 mm was attached, the value was 5112 (gauss). The magnetic air gap 7
Are omitted because the magnetic flux density in the air gap is high and cannot be displayed at the same level. In a rectangular parallelepiped magnet used for a speaker having a narrow width (elongation) structure, the magnetic flux easily leaks into the air because the distance between the plate and the yoke in the short diameter direction is close. As is clear from the comparison between the two figures, the auxiliary magnet 15 reduces the leakage flux in the air,
It can be seen that the magnetic flux passes through the magnetic gap 7.
Thus, by employing the magnetic circuit configuration of the second embodiment, the driving force of the diaphragm can be further increased, and reproduction can be performed efficiently.
【００４２】次に、本発明の第３の実施例について図面
を参照しながら説明する。図７は本発明の第３の実施例
を示す断面図である。なお、図１のスピーカと同一な部
分は同一な符号をつけ、説明を省略する。Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a sectional view showing a third embodiment of the present invention. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００４３】振動方向から見た平面形状が、長径と短径
を有し音を放射する方向に凸状に湾曲した非軸対称形の
振動板１の外周部には、振動板を振動自在に保持するエ
ッジ２が接続されている。エッジ２の断面は円弧状に形
成され、円弧の凸部は振動板２の凸部と同一方向に吐出
している。振動板１に接続されたボイスコイルボビン４
の内面には、振動板の短径方向に関して互いに対向する
面の間を、振動板の振動方向と平行で且つ該対向面と直
角に架張する薄板状連結部材１２がとりつけられてい
る。連結部材１２の下端にはダンパー１３が固着されて
いる。ダンパー１３は断面は、円弧状のロールを振動板
１の短径方向に配置された構成で、円弧の凸部はエッジ
２のロールの凸部と反対の方向になるようにしている。On the outer peripheral portion of the non-axially symmetric diaphragm 1 whose planar shape viewed from the vibration direction has a major axis and a minor axis and is convexly curved in a direction in which sound is emitted, the diaphragm is oscillated freely. The edge 2 to be held is connected. The cross section of the edge 2 is formed in an arc shape, and the convex portion of the arc discharges in the same direction as the convex portion of the diaphragm 2. Voice coil bobbin 4 connected to diaphragm 1
A thin plate-like connecting member 12 is attached to the inner surface of the diaphragm so as to extend between the surfaces facing each other in the minor diameter direction of the diaphragm in parallel with the vibration direction of the diaphragm and at right angles to the facing surface. A damper 13 is fixed to a lower end of the connecting member 12. The cross section of the damper 13 has a configuration in which arc-shaped rolls are arranged in the minor axis direction of the diaphragm 1, and the convex portion of the arc is in the direction opposite to the convex portion of the roll of the edge 2.
【００４４】図８は円弧状の断面を持つロール形状物の
力−変位曲線である。円弧の凹部方向に変形する場合を
マイナス方向、その反対方向をプラス方向としている。
この特性が示すように、断面が円弧状のロール形状物が
上下に変形する際には力−変位曲線が非対称となる。す
なわち、断面が円弧状のロールからなるエッジならびに
ダンパーを変位させる場合、上に動かす場合と下に動か
す場合では必要とする力が異なる。この非線形性は、大
振幅の場合に大きく、歪発生の要因となる。しかしなが
ら本実施例では、エッジとダンパーのロールの向きを相
対向するように配置しているので、形状に起因する非対
称性を相殺することができる。このため、振動特性の直
線性が良くなり、歪の少ない特性を実現することができ
る。FIG. 8 is a force-displacement curve of a roll-shaped object having an arc-shaped cross section. The direction of deformation in the direction of the concave portion of the arc is defined as a minus direction, and the opposite direction is defined as a plus direction.
As this characteristic indicates, when a roll-shaped object having an arc-shaped cross section deforms vertically, the force-displacement curve becomes asymmetric. That is, when displacing the edge and the damper having a roll having an arcuate cross section, the required force is different between the case of moving up and the case of moving down. This non-linearity is large in the case of a large amplitude and causes distortion. However, in this embodiment, since the edges and the rolls of the damper are arranged so as to face each other, the asymmetry caused by the shape can be canceled. For this reason, the linearity of the vibration characteristics is improved, and characteristics with less distortion can be realized.
【００４５】次に、本発明の第４の実施例について図面
を参照しながら説明する。図９は本発明の第４の実施例
のスピーカを示す断面図である。なお、図１のスピーカ
と同一な部分は同一な符号をつけ、説明を省略する。Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a sectional view showing a speaker according to a fourth embodiment of the present invention. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００４６】振動板１に取り付けられたボイスコイルボ
ビン４の内側には、長さを延長した薄板状連結部材１９
が取り付けられ、ダンパー１８を介してフレーム３に固
定されている。図１０は本発明の第４の実施例に用いら
れるダンパー１８の斜視図である。ダンパー１８の中心
部には、凹断面の溝２０がロールの長さ方向に沿って構
成されている。図１１はダンパー１８と長さを延長した
薄板状連結部材１９との接着状態を示す略断面図であ
る。凹断面の溝２０に、長さを延長した薄板状連結部材
１９をはさみ込みながら接着材２１で接着し、フレーム
３に固定する構成となっている。エッジ２に比べてダン
パー１８はフレームとの接着しろの長さが短いため、振
動に伴う応力が集中する。ダンパー１８と薄板状連結部
材１９の接着部分もフレーム３との接着部分と同様に応
力が集中するため剥離しやすくなるが、溝２０を設ける
ことにより接着面積が増加する。また、十分な量の接着
材２１を溝２０に置くことができる。このため、ダンパ
ー１８と薄板状連結部材１９の接着力は格段に向上す
る。従って、長時間の使用で接着不良が発生しにくくな
り、ダンパー１８と薄板状連結部材１９の剥離に伴うス
ピーカの故障を防ぐことができる。Inside the voice coil bobbin 4 attached to the diaphragm 1, a thin plate-like connecting member 19 having an extended length is provided.
Is fixed to the frame 3 via the damper 18. FIG. 10 is a perspective view of a damper 18 used in the fourth embodiment of the present invention. In the center of the damper 18, a groove 20 having a concave cross section is formed along the length direction of the roll. FIG. 11 is a schematic cross-sectional view showing the state of adhesion between the damper 18 and the thin plate-like connecting member 19 whose length is extended. A thin plate-like connecting member 19 whose length is extended is inserted into the groove 20 having a concave cross section with an adhesive 21 while being sandwiched therebetween, and is fixed to the frame 3. Since the damper 18 has a shorter bonding margin with the frame than the edge 2, stress due to vibration is concentrated. Although the adhesive portion between the damper 18 and the thin plate-like connecting member 19 is concentrated similarly to the adhesive portion with the frame 3, the adhesive is easily separated, but the provision of the groove 20 increases the adhesive area. Also, a sufficient amount of the adhesive 21 can be placed in the groove 20. For this reason, the adhesive force between the damper 18 and the thin plate-like connecting member 19 is significantly improved. Therefore, poor adhesion is less likely to occur during long-term use, and a failure of the speaker due to the separation of the damper 18 and the thin plate-like connecting member 19 can be prevented.
【００４７】次に、本発明の第５の実施例について、図
面を参照しながら説明する。なお、図１のスピーカと同
一な部分は同一な符号をつけ、説明を省略する。Next, a fifth embodiment of the present invention will be described with reference to the drawings. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００４８】図１２（ａ）（ｂ）は本実施例のスピーカ
に使用するダンパー２２を示す斜視図と平面図である。
断面が円弧状の２組のロール２３と２４が互いに直交す
るように配置されている。振動板の短径方向に配置され
るロール２３の中心部には断面が凹の溝２０が配置さ
れ、ここに薄板状連結部材１９がはさみこまれて接着さ
れる。各々のロールの終端部には平坦部が有り、図１の
スピーカと同様にフレーム３に固着される。FIGS. 12A and 12B are a perspective view and a plan view showing a damper 22 used in the speaker of this embodiment.
Two sets of rolls 23 and 24 having a circular arc cross section are arranged so as to be orthogonal to each other. A groove 20 having a concave cross section is arranged at the center of the roll 23 arranged in the minor diameter direction of the diaphragm, and the thin plate-like connecting member 19 is sandwiched and bonded here. Each roll has a flat portion at the end, and is fixed to the frame 3 as in the speaker of FIG.
【００４９】このように構成したダンパー２２の動作に
ついて説明する。ダンパーを構成する２組のロール２
３、２４は断面が円弧状のため、上下には容易に動くこ
とができる。しかしながら、ロールの長さ方向にはロー
ルを長さ方向に圧縮しなければならないため、容易には
変形しない。ロール２３の長さ２０ｍｍ、２４の長さ５
ｍｍ、そしてロールの断面の半径が３ｍｍの形状で、材
厚０．３ｍｍの合成繊維材料を用いたダンパー２２の変
位を計算すると、ロールの上下方向にはＦｚ＝１（Ｎ）
で０．１ｍｍ変位するのに対し、ロール２４方向ではＦ
ｘ＝１（Ｎ）で０．００１ｍｍの変位であった。したが
って、本実施例のダンパー２２は上下のスピーカ振動方
向には容易に変位するが、それ以外の方向には変位しに
くい。The operation of the damper 22 thus configured will be described. Two sets of rolls 2 constituting a damper
Since the sections 3 and 24 are arc-shaped, they can easily move up and down. However, the roll does not easily deform in the length direction of the roll because the roll must be compressed in the length direction. Roll 23 length 20 mm, 24 length 5
mm and the radius of the cross section of the roll is 3 mm, and the displacement of the damper 22 using a synthetic fiber material having a material thickness of 0.3 mm is calculated. Fz = 1 (N) in the vertical direction of the roll
In the roll 24 direction,
At x = 1 (N), the displacement was 0.001 mm. Therefore, the damper 22 of the present embodiment is easily displaced in the upper and lower speaker vibration directions, but is hardly displaced in other directions.
【００５０】細長形状のスピーカでは、負荷や駆動力の
アンバランスが発生した場合、振動板の縦横比が大きい
ため長径方向のモーメントが大きくなり、この方向にロ
ーリングを生じやすくなる。スピーカが長径方向にロー
リングを起こすと、振動板の長径方向に回転力が働く。
この力は薄板状連結部材１４を厚み方向に曲げようとし
て働く。そしてダンパー２２を長径方向に変位させよう
とする（図１２（ａ）のＦｘ）。しかしながら、ダンパ
ー２２は長径方向にロール２４が配置されているため、
このローリングによる力を阻止する方向に作用する。こ
のように本実施例のスピーカは、振動板の短径方向と長
径方向にロールを直交するように配置しているため、負
荷や駆動力のアンバランスで生じるローリング等の異常
振動に強くなる。In an elongated speaker, when a load or driving force is imbalanced, the moment in the major axis direction is increased due to the large aspect ratio of the diaphragm, and rolling is likely to occur in this direction. When the speaker rolls in the major axis direction, a rotational force acts in the major axis direction of the diaphragm.
This force acts to bend the thin plate-shaped connecting member 14 in the thickness direction. Then, an attempt is made to displace the damper 22 in the major axis direction (Fx in FIG. 12A). However, since the roll 24 is arranged in the major axis direction of the damper 22,
It acts in a direction to prevent the rolling force. As described above, in the loudspeaker of this embodiment, since the rolls are arranged so as to be orthogonal to the short diameter direction and the long diameter direction of the diaphragm, the loudspeaker is resistant to abnormal vibration such as rolling caused by imbalance of load or driving force.
【００５１】次に、本発明の第６の実施例について、図
面を参照しながら説明する。なお、図１のスピーカと同
一な部分は同一な符号をつけ説明を省略する。Next, a sixth embodiment of the present invention will be described with reference to the drawings. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００５２】図１３は本発明のスピーカのボイスコイル
ボビン（ボイスコイルを含む）を示す斜視図である。ボ
イスコイルボビン内周部には、振動板１の短径方向に関
して互いに対向する面の間を、振動板の振動方向と平行
でかつ該対向面と直角に架張する薄板状連結部材２５が
取り付けられている。薄板状連結部材２５はボイスコイ
ル下端部から下に延長され、薄板状連結部材２５の下端
部に固着したダンパーを介してフレームに取り付けられ
る。薄板状連結部材２５には厚み方向に図１４に示すよ
うな補強リブ２６が有り、厚さ方向の剛性を高めてい
る。FIG. 13 is a perspective view showing a voice coil bobbin (including a voice coil) of the speaker of the present invention. A thin plate-like connecting member 25 is attached to the inner peripheral portion of the voice coil bobbin so as to extend between the surfaces facing each other in the minor axis direction of the diaphragm 1 in parallel with the vibration direction of the diaphragm and at right angles to the facing surface. ing. The thin plate-like connecting member 25 extends downward from the lower end of the voice coil, and is attached to the frame via a damper fixed to the lower end of the thin plate-like connecting member 25. The thin plate-like connecting member 25 has a reinforcing rib 26 as shown in FIG. 14 in the thickness direction to increase the rigidity in the thickness direction.
【００５３】次に、本発明の第７の実施例について、図
面を参照しながら説明する。図１５は本実施例のスピー
カのボイスコイルボビン（ボイスコイルを含む）を示す
斜視図である。ボイスコイルボビン４の外周面にはボイ
スコイル５が回巻されている。ボイスコイルボビン内周
部には、振動板１の短径方向に関して互いに対向する面
の間を、振動板の振動方向と平行で且つ該対向面と直角
に架張する薄板状連結部材２７がとりつけられている。
薄板状連結部材２７はボイスコイル下端部から下に延長
され、薄板状連結部材２５の下端部に固着したダンパー
を介してフレームに取り付けられる。薄板状連結部材２
７は図１６に示すように、ポリスチレンやポリウレタン
などの高分子発泡体や、バルサ等の軽量天然繊維材料、
多数の小空間からなるハニカム材料、等の心材２８の両
側にアルミニウムやチタン等の高剛性軽量薄箔２９を接
着したサンドイッチ構造体を構成し、厚さ方向の剛性を
高めている。Next, a seventh embodiment of the present invention will be described with reference to the drawings. FIG. 15 is a perspective view showing a voice coil bobbin (including a voice coil) of the speaker of this embodiment. A voice coil 5 is wound around the outer peripheral surface of the voice coil bobbin 4. A thin plate-like connecting member 27 is attached to the inner peripheral portion of the voice coil bobbin so as to extend between the surfaces facing each other in the minor diameter direction of the diaphragm 1 in parallel with the vibration direction of the diaphragm and at right angles to the facing surface. ing.
The thin connecting member 27 extends downward from the lower end of the voice coil, and is attached to the frame via a damper fixed to the lower end of the thin connecting member 25. Thin plate connecting member 2
7 is a polymer foam such as polystyrene or polyurethane, a lightweight natural fiber material such as balsa as shown in FIG.
A sandwich structure in which a high-rigidity light-weight thin foil 29 such as aluminum or titanium is adhered to both sides of a core material 28 made of a honeycomb material made of many small spaces or the like to increase rigidity in a thickness direction.
【００５４】以下、第６、第７の実施例の動作について
説明する。細長の振動板を持つスピーカでは、長径方向
のモーメントが大きく、負荷や駆動力がアンバランスと
なった場合、長径方向で異常振動を生じ易い。この長径
方向の振動は薄板状連結部材の厚み方向に対し、曲げモ
ーメントとして作用する。しかしながら第６、第７の実
施例のスピーカでは、薄板状連結部材の厚さ方向の曲げ
剛性を、補強リブやサンドイッチ構造とすることで高め
ることができる。このため、負荷や駆動力のアンバラン
スで生じるローリング等の異常振動に強くなる。The operation of the sixth and seventh embodiments will be described below. In a speaker having an elongated diaphragm, a large moment in the major axis direction is large, and when the load or the driving force is unbalanced, abnormal vibration is likely to occur in the major axis direction. The vibration in the long diameter direction acts as a bending moment in the thickness direction of the thin plate-shaped connecting member. However, in the loudspeakers of the sixth and seventh embodiments, the bending rigidity in the thickness direction of the thin plate-like connecting member can be increased by using a reinforcing rib or a sandwich structure. For this reason, it becomes strong against abnormal vibration such as rolling caused by imbalance of load and driving force.
【００５５】最後に、本発明の第８の実施例のスピーカ
について、図を参照しながら説明する。なお、図１のス
ピーカと同一な部分は同一な符号をつけ、説明を省略す
る。Finally, a speaker according to an eighth embodiment of the present invention will be described with reference to the drawings. The same parts as those of the speaker in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
【００５６】図１７（ａ）（ｂ）は本実施例のスピーカ
の振動板１と振動板１に接続されたボイスコイル組み立
て品を示す平面図、正面図である。振動方向から見た平
面形状が、長径と短径を有し音を放射する方向に凸状に
湾曲した非軸対称形の振動板１には、円弧状に形成され
た複数の薄板状補強部材１４が短径方向に接着されてい
る。FIGS. 17A and 17B are a plan view and a front view showing the diaphragm 1 and the voice coil assembly connected to the diaphragm 1 of the speaker of the present embodiment. A non-axially symmetric diaphragm 1 having a major axis and a minor axis and a convex shape curved in a direction in which sound is emitted when viewed from the vibration direction has a plurality of thin plate-like reinforcing members formed in an arc shape. 14 are bonded in the minor diameter direction.
【００５７】ボイスコイルボビン４は、平面形状が長径
と短径とを有する非軸対称形であって、かつ振動板の長
径方向に関して互いに平行な直線部分を成し、終端部は
円弧で連結した形状である。ボイスコイルボビン４の内
側には、振動板１の短径方向に関して互いに対向する面
の間を、振動板１の振動方向と平行で且つ該対向面と直
角に架張する４個の薄板状連結部材１２が取り付けられ
ている。薄板状連結部材１２の一対は中心部に配置さ
れ、薄板状補強部材１４と連結されている。この薄板状
連結部材１２と薄板状補強部材１４とは、第１の実施例
で述べたように別個に設けても良い。中心部の薄板状連
結部材１２はボイスコイルボビン４の平坦部をなるべく
短くする位置に設けられる。例えば、１個の場合は長径
方向の中心に、本実施例の様に２個の場合は長径方向の
約１／３の位置に各々設置する。他の一対の薄板状連結
部材１２は、ボイスコイル終端の円弧と直線の連結箇所
近傍に取り付けられている。The voice coil bobbin 4 has a non-axially symmetrical planar shape having a major axis and a minor axis, and forms linear portions parallel to each other with respect to the major axis direction of the diaphragm, and has a terminal end connected by an arc. It is. Inside the voice coil bobbin 4, four thin plate-like connecting members extending between surfaces facing each other in the minor axis direction of the diaphragm 1 parallel to the vibration direction of the diaphragm 1 and perpendicular to the facing surface. 12 are attached. A pair of the thin plate-like connecting members 12 are arranged at the center and connected to the thin plate-like reinforcing member 14. The thin plate-shaped connecting member 12 and the thin plate-shaped reinforcing member 14 may be provided separately as described in the first embodiment. The thin plate-like connecting member 12 at the center is provided at a position where the flat portion of the voice coil bobbin 4 is made as short as possible. For example, in the case of one, it is installed at the center in the long diameter direction, and in the case of two, as in the present embodiment, it is installed at about １ ／ of the long diameter direction. The other pair of thin plate-like connecting members 12 are attached in the vicinity of the connecting point of the arc and the straight line at the end of the voice coil.
【００５８】このように配置したスピーカの動作につい
て説明する。振動板の縦横比を大きくした場合、ボイス
コイルの平行な直線部分が長くなる。この場合、いくつ
かの特定の周波数（共振周波数）においてボイスコイル
ボビンの直線部分が共振し、振動板の振動方向とは直角
の方向（ボイスコイルボビンを駆動する磁気回路の、磁
気ギャップ内での磁束の方向）に振動する。直線部分が
長くなるに従って共振周波数は低くなり、共振の振幅も
増大する。薄板状連結部材１４によって平坦部が連結さ
れたボイスコイルボビンは、格子げた構造を構成するた
め、強度が向上する。さらに本実施例のボイスコイルで
は、中心付近に加えて直線と円弧の連結部分にも薄板状
連結部材１２を配置しているため、円弧のみの場合に比
べて強度がさらに増加する。しかも、格子げた構造の格
子の数が増す形状効果に加え、ボイスコイルの平坦部分
の長さも短くなるため、共振時の振幅を小さくすること
ができる。The operation of the thus arranged speaker will be described. When the aspect ratio of the diaphragm is increased, a parallel straight line portion of the voice coil becomes longer. In this case, the linear portion of the voice coil bobbin resonates at some specific frequencies (resonant frequencies), and a direction perpendicular to the direction of vibration of the diaphragm (the magnetic circuit that drives the voice coil bobbin, the magnetic flux in the magnetic gap). Direction). As the linear portion becomes longer, the resonance frequency becomes lower, and the amplitude of the resonance also increases. The voice coil bobbin whose flat portions are connected by the thin plate-shaped connecting member 14 has a latticed structure, so that the strength is improved. Further, in the voice coil of the present embodiment, since the thin plate-like connecting member 12 is arranged not only in the vicinity of the center but also in the connecting portion between the straight line and the arc, the strength is further increased as compared with the case of only the arc. Moreover, in addition to the shape effect of increasing the number of lattices having a lattice structure, the length of the flat portion of the voice coil is also reduced, so that the amplitude at the time of resonance can be reduced.
【００５９】ボイスコイルボビンの共振周波数を有限要
素法にて計算したので以下に示す。ボイスコイルの大き
さは、長径１７５ｍｍ、短径２２ｍｍであり、ボイスコ
イルボビンの共振振幅を計算するための、構成部品の材
料定数を（表１）に示す。The resonance frequency of the voice coil bobbin is calculated by the finite element method and is shown below. The size of the voice coil has a major axis of 175 mm and a minor axis of 22 mm. The material constants of the components for calculating the resonance amplitude of the voice coil bobbin are shown in (Table 1).
【００６０】[0060]
【表１】 [Table 1]
【００６１】薄板状補強部材１２が無い場合、ｆ1＝１
０２．５Ｈｚで振幅が１．７７ｍｍ、ｆ2＝１７５．２
Ｈｚで振幅が２．１６ｍｍであった。一方、振動板の長
辺の長さを１／３に区切る位置に一対の補強部材１２を
配置した場合は、ｆ1＝１１１．１Ｈｚで振幅が０．１
９８ｍｍ、ｆ2＝５０３．７Ｈｚで０．１９１５ｍｍと
なり、さらに円弧と直線の連結部にも配置した場合に
は、ｆ1＝１０２．２Ｈｚで０．０９６ｍｍ、ｆ2＝６０
１．８Ｈｚで０．０１４８ｍｍであった。このように本
実施例のスピーカでは、ボイスコイルボビンの共振振幅
を大幅に減少することができる。When the thin plate-like reinforcing member 12 is not provided, f 1 = 1
The amplitude is 1.77 mm at 02.5 Hz and f 2 = 175.2
The amplitude was 2.16 mm in Hz. On the other hand, when the pair of reinforcing members 12 are arranged at positions where the length of the long side of the diaphragm is divided into ３, the amplitude is 0.1 at f 1 = 111.1 Hz.
It is 0.1915 mm at 98 mm and f 2 = 503.7 Hz, and when it is also arranged at the connection between the arc and the straight line, 0.096 mm at f 1 = 102.2 Hz and f 2 = 60.
It was 0.0148 mm at 1.8 Hz. Thus, in the speaker of the present embodiment, the resonance amplitude of the voice coil bobbin can be significantly reduced.
【００６２】このように、薄板状連結部材１２をボイス
コイル終端部近傍に配置することにより、ボイスコイル
の強度が向上する。このため、歪の少ない音を再生する
ことができる。As described above, the strength of the voice coil is improved by arranging the thin plate-shaped connecting member 12 near the voice coil end portion. Therefore, a sound with little distortion can be reproduced.
【００６３】[0063]
【発明の効果】以上のように、本発明のスピーカによれ
ば、細幅でありながら、分割共振が起こりにくく平坦な
周波数特性が得られ、変換効率が高まり、異常振動が生
じにくい、音質の優れたスピーカを得ることが可能とな
る。As described above, according to the loudspeaker of the present invention, although it is narrow, a split frequency is less likely to occur, a flat frequency characteristic is obtained, conversion efficiency is increased, abnormal vibration is less likely to occur, and sound quality is improved. An excellent speaker can be obtained.
【図１】本発明の第１の実施例の構成を示すスピーカの
部品分解斜視図FIG. 1 is an exploded perspective view of a speaker component showing a configuration of a first embodiment of the present invention.
【図２】（ａ）は本発明の第１の実施例の構成を示すス
ピーカの平面図 （ｂ）は同長径方向断面図 （ｃ）は他の構成例を示す平面図FIG. 2A is a plan view of a speaker showing a configuration of a first embodiment of the present invention; FIG. 2B is a cross-sectional view in the same major diameter direction; FIG. 2C is a plan view showing another configuration example;
【図３】本発明の第２の実施例の構成を示すスピーカの
長径方向断面図FIG. 3 is a longitudinal sectional view of a speaker showing a configuration of a second embodiment of the present invention.
【図４】本発明の第２の実施例に係る磁気回路の構成を
示す斜視図FIG. 4 is a perspective view showing a configuration of a magnetic circuit according to a second embodiment of the present invention.
【図５】本発明の第２の実施例に係る磁気回路の他の構
成を示す斜視図FIG. 5 is a perspective view showing another configuration of the magnetic circuit according to the second embodiment of the present invention.
【図６】（ａ）は本発明の第２の実施例のスピーカにお
いて、補助磁石がない場合の磁気回路漏洩磁束分布図 （ｂ）は本発明の第２の実施例のスピーカにおいて、補
助磁石がある場合の磁気回路漏洩磁束分布図FIG. 6 (a) is a diagram of a magnetic circuit leakage magnetic flux distribution without an auxiliary magnet in the speaker of the second embodiment of the present invention, and FIG. 6 (b) is an auxiliary magnet of the speaker of the second embodiment of the present invention. Magnetic circuit leakage flux distribution diagram when there is
【図７】本発明の第３の実施例のスピーカの構成を示す
長径方向断面図FIG. 7 is a longitudinal sectional view showing a configuration of a speaker according to a third embodiment of the present invention.
【図８】本発明の第３の実施例のスピーカのロール部の
力−変位特性図FIG. 8 is a diagram showing a force-displacement characteristic of a roll portion of a speaker according to a third embodiment of the present invention.
【図９】本発明の第４の実施例のスピーカの構成を示す
長径方向断面図FIG. 9 is a longitudinal sectional view showing the configuration of a speaker according to a fourth embodiment of the present invention.
【図１０】本発明の第４の実施例のスピーカに係るダン
パーを示す斜視図FIG. 10 is a perspective view showing a damper relating to a speaker according to a fourth embodiment of the present invention.
【図１１】本発明の第４の実施例のスピーカに係る支持
系の構成を示す概略断面図FIG. 11 is a schematic cross-sectional view showing a configuration of a support system according to a speaker according to a fourth embodiment of the present invention.
【図１２】（ａ）は本発明の第５の実施例のスピーカに
係るダンパーを示す斜視図 （ｂ）は本発明の第５の実施例のスピーカに係るダンパ
ーを示す平面図FIG. 12A is a perspective view showing a damper according to a fifth embodiment of the present invention; FIG. 12B is a plan view showing a damper according to a fifth embodiment of the present invention;
【図１３】本発明の第６の実施例のスピーカに係るボイ
スコイルおよび薄型連結部材の構成を示す斜視図FIG. 13 is a perspective view showing a configuration of a voice coil and a thin connecting member according to a speaker of a sixth embodiment of the present invention.
【図１４】本発明の第６の実施例のスピーカに係る薄型
連結部材の構成を示す斜視図FIG. 14 is a perspective view showing a configuration of a thin connecting member according to a speaker of a sixth embodiment of the present invention.
【図１５】本発明の第７の実施例のスピーカに係るボイ
スコイルおよび薄型連結部材の構成を示す斜視図FIG. 15 is a perspective view showing a configuration of a voice coil and a thin connecting member according to a speaker of a seventh embodiment of the present invention.
【図１６】本発明の第７の実施例のスピーカに係る薄型
連結部材の構成を示す斜視図FIG. 16 is a perspective view showing a configuration of a thin connecting member according to a speaker of a seventh embodiment of the present invention.
【図１７】（ａ）は本発明の第８の実施例の構成を示す
平面図 （ｂ）は本発明の第８の実施例の構成を示す長径方向断
面図FIG. 17A is a plan view showing a configuration of an eighth embodiment of the present invention. FIG. 17B is a longitudinal sectional view showing a configuration of the eighth embodiment of the present invention.
【図１８】既に本出願人が提案しているスピーカの振動
板およびエッジの平面図FIG. 18 is a plan view of a diaphragm and an edge of a speaker already proposed by the present applicant.
【図１９】振動板１と薄板状補強部材１４の構成を示す
斜視図FIG. 19 is a perspective view showing a configuration of a diaphragm 1 and a thin plate-like reinforcing member 14.
１ 振動板 ２ エッジ ３ フレーム ４ ボイスコイルボビン ５ ボイスコイル ７ 磁気ギャップ ８ ヨーク ９ 磁石 １０ プレート １１ 空隙 １２ 薄型連結部材 １３ ダンパー １４ 薄型補強部材 １５ 補助マグネット １６ 磁気回路 １７ 磁気回路 １８ ダンパー １９ 薄型連結部材 ２０ 凹型溝 ２１ 接着材 ２２ ダンパー ２３ ロール ２４ ロール ２５ 薄型連結部材 ２６ 補強リブ ２７ 薄型連結部材 ２８ 心材 ２９ 表面材 ３０ 薄型連結部材 DESCRIPTION OF SYMBOLS 1 Diaphragm 2 Edge 3 Frame 4 Voice coil bobbin 5 Voice coil 7 Magnetic gap 8 Yoke 9 Magnet 10 Plate 11 Air gap 12 Thin connecting member 13 Damper 14 Thin reinforcing member 15 Auxiliary magnet 16 Magnetic circuit 17 Magnetic circuit 18 Damper 19 Thin connecting member 20 Recessed groove 21 Adhesive material 22 Damper 23 Roll 24 Roll 25 Thin connecting member 26 Reinforcement rib 27 Thin connecting member 28 Core material 29 Surface material 30 Thin connecting member
フロントページの続き (72)発明者 岩佐 幹郎 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 酒井 邦明 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平７−298389（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04R 7/22 H04R 9/04 105 H04R 9/06 Continued on the front page (72) Inventor Mikio Iwasa 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Kuniaki Sakai 1006 Odaka Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56 References JP-A-7-298389 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04R 7/22 H04R 9/04 105 H04R 9/06
Claims (7)
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続されたボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する薄板状連結部材
と、 前記振動板の短径方向に、振動板の内面に接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着されたダンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記複数の薄板状補強部材は、前記振動板の長径方向に
対して不等間隔に配置されたことを特徴とするスピー
カ。1. A non-axially symmetric diaphragm which has a major axis and a minor axis in a planar shape viewed from the vibration direction, and is curved in a convex shape in a direction in which sound is emitted, and along an outer peripheral portion of the diaphragm. An edge formed in a band shape, the band-shaped inner peripheral portion being connected to an outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely; a voice coil bobbin connected to the diaphragm; and an outer periphery of the voice coil bobbin A voice coil wound around a surface; a magnetic circuit for applying a magnetic flux for vibration to the voice coil; and a vibration of the diaphragm between the surfaces of the voice coil bobbin opposed to each other in a minor axis direction of the diaphragm. A thin plate-like connecting member extending parallel to the direction and perpendicular to the facing surface; a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a short diameter direction of the diaphragm; Freely in the vibration direction, A damper fixed to a lower end of the connection member; and an outer peripheral portion of the edge, the magnetic circuit, and a frame holding the damper, wherein the plurality of thin plate-shaped reinforcing members are arranged in a longitudinal direction of the diaphragm. A speaker characterized by being arranged at unequal intervals.
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続されたボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する薄板状連結部材
と、 前記振動板の短径方向に、振動板の内面に接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着された断面が円弧状のロールを持つダ
ンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記ダンパーと前記エッジはロールの凸方向が相対向し
て配置されたことを特徴とするスピーカ。2. A non-axially symmetric diaphragm which has a major axis and a minor axis when viewed from the vibration direction and which is curved convexly in a direction in which sound is radiated; An edge formed in a band shape, the band-shaped inner peripheral portion being connected to an outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely; a voice coil bobbin connected to the diaphragm; and an outer periphery of the voice coil bobbin A voice coil wound around a surface; a magnetic circuit for applying a magnetic flux for vibration to the voice coil; and a vibration of the diaphragm between the surfaces of the voice coil bobbin opposed to each other in a minor axis direction of the diaphragm. A thin plate-like connecting member extending parallel to the direction and perpendicular to the facing surface; a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a short diameter direction of the diaphragm; Freely in the vibration direction, A damper having a roll having an arc-shaped cross section fixed to a lower end of the connecting member; and a frame holding the outer periphery of the edge, the magnetic circuit, and the damper, wherein the damper and the edge are convex portions of the roll. A loudspeaker characterized in that the directions are opposite to each other.
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続されたボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する薄板状連結部材
と、 前記振動板の短径方向に、振動板の内面と接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着されたダンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記ダンパーは薄板状連結部材を保持する凹部を具備し
たことを特徴とするスピーカ。3. A non-axially symmetric diaphragm which has a major axis and a minor axis in a planar shape as viewed from the vibration direction, and is curved in a convex shape in a direction in which sound is emitted, and along an outer peripheral portion of the diaphragm. An edge formed in a band shape, the band-shaped inner peripheral portion being connected to an outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely; a voice coil bobbin connected to the diaphragm; and an outer periphery of the voice coil bobbin A voice coil wound around a surface; a magnetic circuit for applying a magnetic flux for vibration to the voice coil; and a vibration of the diaphragm between the surfaces of the voice coil bobbin opposed to each other in a minor axis direction of the diaphragm. A thin plate-like connecting member extending parallel to the direction and perpendicular to the facing surface; a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a short diameter direction of the diaphragm; Freely in the vibration direction, A damper fixed to a lower end of the connecting member, an outer peripheral portion of the edge, the magnetic circuit, and a frame holding the damper, wherein the damper includes a concave portion holding the thin plate-shaped connecting member. Speaker.
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続されたボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する薄板状連結部材
と、 前記振動板の短径方向に、振動板の内面に接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着されたダンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記ダンパーは断面が円弧状の２対のロールが直交する
ように配置されたことを特徴とするスピーカ。4. A non-axially symmetric diaphragm which has a major axis and a minor axis in a planar shape viewed from the vibration direction, and is curved in a convex shape in a direction in which sound is emitted, and along an outer peripheral portion of the diaphragm. An edge formed in a band shape, the band-shaped inner peripheral portion being connected to an outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely; a voice coil bobbin connected to the diaphragm; and an outer periphery of the voice coil bobbin A voice coil wound around a surface; a magnetic circuit for applying a magnetic flux for vibration to the voice coil; and a vibration of the diaphragm between the surfaces of the voice coil bobbin opposed to each other in a minor axis direction of the diaphragm. A thin plate-like connecting member extending parallel to the direction and perpendicular to the facing surface; a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a short diameter direction of the diaphragm; Freely in the vibration direction, A damper fixed to a lower end of the connecting member, an outer peripheral portion of the edge, the magnetic circuit, and a frame holding the damper, wherein the damper is configured such that two pairs of rolls having an arc-shaped cross section are orthogonal to each other. A speaker characterized by being arranged.
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続されたボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する薄板状連結部材
と、 前記振動板の短径方向に、振動板の内面と接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着されたダンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記薄板状連結部材は厚さ方向に補強リブが配置された
ことを特徴とするスピーカ。5. A non-axially symmetric diaphragm which has a major axis and a minor axis in a planar shape viewed from the vibration direction, and is curved in a convex shape in a direction in which sound is emitted, and along an outer peripheral portion of the diaphragm. An edge formed in a band shape, the band-shaped inner peripheral portion being connected to an outer peripheral portion of the diaphragm, and an edge for holding the diaphragm so as to vibrate freely; a voice coil bobbin connected to the diaphragm; and an outer periphery of the voice coil bobbin A voice coil wound around a surface; a magnetic circuit for applying a magnetic flux for vibration to the voice coil; and a vibration of the diaphragm between the surfaces of the voice coil bobbin opposed to each other in a minor axis direction of the diaphragm. A thin plate-like connecting member extending parallel to the direction and perpendicular to the facing surface; a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a short diameter direction of the diaphragm; Freely in the vibration direction, A damper fixed to a lower end of the connecting member, an outer peripheral portion of the edge, the magnetic circuit, and a frame holding the damper, wherein the thin plate-shaped connecting member has reinforcing ribs arranged in a thickness direction. A speaker characterized by the above-mentioned.
密度の小さい材料を心材とし、その両側をアルミやチタ
ンなどの軽量高剛性材料の薄箔でサンドイッチ構造とし
たことを特徴とする請求項１記載のスピーカ。6. The thin plate-like connecting member is characterized in that a core material is made of a material having a low areal density such as a polymer foam, and a sandwich structure is formed on both sides of the core material by a thin foil of a light and high rigid material such as aluminum or titanium. The speaker according to claim 1, wherein
有し、音を放射する方向に凸状に湾曲した非軸対称形の
振動板と、 前記振動板の外周部に沿って帯状に形成され、該帯状の
内周部が前記振動板の外周部に接続され、前記振動板を
振動自在に保持するエッジと、 前記振動板に接続され、平面形状が長径と短径とを有す
る非軸対称形であって、かつ振動板の長径方向に関し
て、互いに平行な直線部分を成し終端部は円弧で連結し
たボイスコイルボビンと、 前記ボイスコイルボビンの外周面に回巻されたボイスコ
イルと、 前記ボイスコイルに振動用の磁束を与える磁気回路と、 前記ボイスコイルボビンの、前記振動板の短径方向に関
して互いに対向する面の間を、前記振動板の振動方向と
平行で且つ該対向面と直角に架張する３個以上の薄板状
連結部材と、 前記振動板の短径方向に、振動板の内面と接合される複
数の円弧状薄板状補強部材と、 前記振動板を振動方向に自由自在に保持する、前記連結
部材の下端に固着されたダンパーと、 前記エッジの外周部、前記磁気回路、前記ダンパーを保
持するフレームとを具備し、 前記薄板状補強部材のうちの一対はボイスコイルの直線
部分と円弧部分との連結部近傍に配置したことを特徴と
するスピーカ。7. A non-axially symmetric diaphragm which has a major axis and a minor axis in a planar shape as viewed from the vibration direction, and is curved in a convex shape in a direction in which sound is emitted, and along an outer peripheral portion of the diaphragm. An edge that is formed in a band shape, the inner peripheral portion of the band shape is connected to the outer peripheral portion of the diaphragm, and the edge that vibrates and holds the diaphragm, and that is connected to the diaphragm and has a major axis and a minor axis in a planar shape. A voice coil bobbin which is a non-axisymmetrical shape and has a linear portion parallel to each other with respect to the major axis direction of the diaphragm and a terminal end portion of which is connected by an arc, and a voice coil wound around the outer peripheral surface of the voice coil bobbin. A magnetic circuit that applies a magnetic flux for vibration to the voice coil, and a space between surfaces of the voice coil bobbin that are opposed to each other with respect to a minor axis direction of the diaphragm, and that is in parallel with the vibration direction of the diaphragm and the opposed surface. Three or more at right angles A plate-like connecting member, a plurality of arc-shaped thin plate-like reinforcing members joined to an inner surface of the diaphragm in a minor diameter direction of the diaphragm, and the connecting member, which freely holds the diaphragm in a vibration direction. A damper fixed to a lower end, an outer peripheral portion of the edge, the magnetic circuit, and a frame holding the damper, wherein one of the thin plate-like reinforcing members is connected to a straight portion and an arc portion of a voice coil. A speaker, wherein the speaker is arranged near a unit.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06271995A JP3156538B2 (en) | 1995-03-22 | 1995-03-22 | Speaker |
| EP95106124A EP0680242B1 (en) | 1994-04-25 | 1995-04-24 | Elongated loudspeaker |
| CA002147684A CA2147684C (en) | 1994-04-25 | 1995-04-24 | Loudspeaker |
| US08/426,707 US5664024A (en) | 1994-04-25 | 1995-04-24 | Loudspeaker |
| DE69535049T DE69535049T2 (en) | 1994-04-25 | 1995-04-24 | Extended speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06271995A JP3156538B2 (en) | 1995-03-22 | 1995-03-22 | Speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08265895A JPH08265895A (en) | 1996-10-11 |
| JP3156538B2 true JP3156538B2 (en) | 2001-04-16 |
Family
ID=13208446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06271995A Expired - Lifetime JP3156538B2 (en) | 1994-04-25 | 1995-03-22 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3156538B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010034989A (en) * | 2008-07-30 | 2010-02-12 | Pioneer Electronic Corp | Speaker system |
| JP2014036786A (en) * | 2012-08-20 | 2014-02-27 | Aisin Seiki Co Ltd | Mattress with replaceable cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100390002B1 (en) * | 2000-10-10 | 2003-07-04 | 주식회사 마이크로 텍 | Mono/Stereo Dual Microspeaker Having Dual Voice Coil Drivers |
| KR100621648B1 (en) * | 2004-03-25 | 2006-09-13 | 유옥정 | A micro speaker with directed driving vibration flat |
| KR100897807B1 (en) * | 2006-06-29 | 2009-05-15 | 엘지전자 주식회사 | Speaker |
| KR100902895B1 (en) * | 2006-06-29 | 2009-06-15 | 엘지전자 주식회사 | Speaker |
| KR100888965B1 (en) * | 2006-06-29 | 2009-03-17 | 엘지전자 주식회사 | Speaker |
| KR100751862B1 (en) * | 2006-11-01 | 2007-08-23 | 주식회사 한국토프톤 | Track type slim voice-coil former |
| KR100751866B1 (en) * | 2007-01-03 | 2007-08-23 | 주식회사 한국토프톤 | Unit of rectangle slim type speaker |
| US7848536B2 (en) | 2007-11-02 | 2010-12-07 | Onkyo Corporation | Voice coil assembly, loudspeaker using the same, and method for producing the same |
| KR101134612B1 (en) * | 2009-02-12 | 2012-04-09 | 주식회사 진영지앤티 | Rectangle speaker module |
| WO2012120806A1 (en) * | 2011-03-04 | 2012-09-13 | パナソニック株式会社 | Speaker and electronic apparatus using said speaker |
| JP4906971B1 (en) * | 2011-07-11 | 2012-03-28 | 大和音響株式会社 | Speaker |
| US9942662B2 (en) | 2016-06-14 | 2018-04-10 | Bose Corporation | Electro-acoustic driver having compliant diaphragm with stiffening element |
| US20170359656A1 (en) * | 2016-06-14 | 2017-12-14 | Bose Corporation | Electro-acoustic driver and bobbin therefore |
| WO2018226869A1 (en) * | 2017-06-08 | 2018-12-13 | Bose Corporation | Electro-acoustic driver and bobbin therefore |
-
1995
- 1995-03-22 JP JP06271995A patent/JP3156538B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010034989A (en) * | 2008-07-30 | 2010-02-12 | Pioneer Electronic Corp | Speaker system |
| JP2014036786A (en) * | 2012-08-20 | 2014-02-27 | Aisin Seiki Co Ltd | Mattress with replaceable cover |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08265895A (en) | 1996-10-11 |
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