JPH1127772A - Loud speaker - Google Patents
Loud speakerInfo
- Publication number
- JPH1127772A JPH1127772A JP18740697A JP18740697A JPH1127772A JP H1127772 A JPH1127772 A JP H1127772A JP 18740697 A JP18740697 A JP 18740697A JP 18740697 A JP18740697 A JP 18740697A JP H1127772 A JPH1127772 A JP H1127772A
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- speaker
- cover member
- magnetic circuit
- magnets
- 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
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、反発型磁気回路を
使用したスピーカに係り、詳しくは、２つのマグネット
を同極側が対向するように配置してマグネットの外周に
生じる反発磁束による磁界内にボイスコイルを配置して
構成されるスピーカに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker using a repulsive magnetic circuit, and more particularly, to a loudspeaker in which two magnets are arranged so that the same poles are opposed to each other so that the two magnets are in a magnetic field due to repulsive magnetic flux generated on the outer periphery of the magnet. The present invention relates to a speaker configured by arranging voice coils.
【０００２】[0002]
【従来の技術】従来より、スピーカを薄型化するため
に、２つのマグネットを同極側が対向するように配置し
てマグネットの外周に反発磁束による磁界が形成される
ようにした反発型磁気回路を使用し、該磁界内にボイス
コイルを配置するようにしたスピーカがあり、我々も反
発磁気回路型スピーカと称されるこの形式のスピーカに
ついて各種のものを提案している（例えば、特開平６−
２３３３７９号公報、特開平８−６５７８４号公報
等）。2. Description of the Related Art Conventionally, in order to make a speaker thinner, a repulsion type magnetic circuit in which two magnets are arranged so that the same polarity side is opposed to each other so that a magnetic field due to repulsion magnetic flux is formed on the outer periphery of the magnet. There is a loudspeaker used and a voice coil arranged in the magnetic field, and we have proposed various types of loudspeaker of this type called a repulsion magnetic circuit type loudspeaker (for example, see Japanese Unexamined Patent Publication No.
233379, JP-A-8-65784, etc.).
【０００３】図２及び図３は従来の反発磁気回路型スピ
ーカの例を示し、図中、１は反発型磁気回路であり、リ
ング状のマグネット２、３を同極側が対向するように配
置することによりマグネットの外周側に生じる反発磁束
による磁界を形成するように構成したものである。この
場合、磁束密度を高めるために両マグネット２、３間に
磁性材からなるセンタープレート４を介在させることが
ある。FIGS. 2 and 3 show an example of a conventional repulsion magnetic circuit type speaker. In the drawings, reference numeral 1 denotes a repulsion type magnetic circuit, in which ring-shaped magnets 2 and 3 are arranged so that the same poles face each other. Thus, a magnetic field due to repulsive magnetic flux generated on the outer peripheral side of the magnet is formed. In this case, a center plate 4 made of a magnetic material may be interposed between the two magnets 2 and 3 in order to increase the magnetic flux density.
【０００４】反発磁気回路型スピーカは前記磁界内、即
ち、センタープレートの外周側にボイスコイル５を配置
して構成されるものであり、図２の例では振動板６及び
ダンパ７の内径部が前記ボイスコイル５の上方側でコイ
ルボビン５ａに接合され、図３の例ではコイルボビン５
ａの下方側で接合されている。[0004] The repulsion magnetic circuit type loudspeaker is constructed by arranging the voice coil 5 in the magnetic field, that is, on the outer peripheral side of the center plate. In the example of FIG. The coil bobbin 5a is joined to the coil bobbin 5a above the voice coil 5, and in the example of FIG.
a at the lower side.
【０００５】８はダストキャップ、９は磁気回路を保持
するホルダーであり、前記マグネット２、３及びセンタ
ープレート４の中心穴に挿入するポール部９ａを有し、
ワッシャ１２を介して取付ネジ１１でマグネット及びセ
ンタープレートをポール部に締め付け固定するようにな
っている。１０はホルダー９に取り付けられるフレー
ム、１３はフレーム１０の一部に取り付けられる端子を
示している。なお、磁束密度をより高めるために前記セ
ンタープレート４の外周側に磁性材からなるアウターリ
ング（図示しない）を配置して該アウターリングとセン
タープレート４との間にボイスコイル５を配置したもの
もあるが、スピーカを薄型化するために、一般には図２
及び図３に示すようにアウターリングを配置しない形式
のものが多い。Reference numeral 8 denotes a dust cap, 9 denotes a holder for holding a magnetic circuit, and has a pole portion 9a inserted into the center holes of the magnets 2, 3 and the center plate 4.
The magnet and the center plate are fastened and fixed to the pole portion with the mounting screw 11 via the washer 12. Reference numeral 10 denotes a frame attached to the holder 9, and 13 denotes a terminal attached to a part of the frame 10. In order to further increase the magnetic flux density, an outer ring (not shown) made of a magnetic material is arranged on the outer peripheral side of the center plate 4 and a voice coil 5 is arranged between the outer ring and the center plate 4. However, in order to make the speaker thinner, the
In many cases, the outer ring is not provided as shown in FIG.
【０００６】[0006]
【発明が解決しようとする課題】前記のようにアウター
リングを配置したものにおいてはボイスコイル５からの
発熱をアウターリングを介して放熱することができ、ま
た、図２のように、ボイスコイル５が金属製のフレーム
１０の近くに位置する場合にはフレームからの放熱が可
能であるが、図３に示すように、ボイスコイル５の近傍
に放熱に資するような金属部材がない場合には、放熱性
が悪いために、ボイスコイルが焼損してしまったり、高
温によりマグネットが減磁してスピーカの性能が劣化す
ることから、高入力用のスピーカとしては不向きであっ
た。In the case where the outer ring is arranged as described above, the heat generated from the voice coil 5 can be radiated through the outer ring, and as shown in FIG. Can be dissipated from the frame when it is located near the metal frame 10, but as shown in FIG. 3, when there is no metal member contributing to heat dissipation near the voice coil 5, Since the voice coil is burned out due to poor heat dissipation, or the magnet is demagnetized due to high temperature, and the performance of the speaker deteriorates, it is not suitable for a high input speaker.
【０００７】前記のような熱対策として、例えば、ボイ
スコイルの線径を太くした場合には、ボイスコイルの重
量が増加し、音圧レベルが下がってスピーカの性能が劣
化する欠点がある。As a countermeasure against the heat as described above, for example, when the wire diameter of the voice coil is increased, the weight of the voice coil increases, the sound pressure level decreases, and the performance of the speaker deteriorates.
【０００８】本発明の目的は、前記のような従来の反発
磁気回路型スピーカの欠点を解消し、ボイスコイルから
の発熱を放熱することができ、ボイスコイルの焼損やス
ピーカの性能が劣化したりするおそれがない反発磁気回
路型のスピーカを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the conventional repulsive magnetic circuit type speaker, to radiate heat generated from the voice coil, to burn out the voice coil and to deteriorate the performance of the speaker. It is an object of the present invention to provide a repulsion magnetic circuit type speaker which is not likely to be generated.
【０００９】[0009]
【問題を解決するための手段】本発明のスピーカは、請
求項１記載のものにおいては、２つのマグネットを同極
側が対向するように配置してマグネットの外周に反発磁
束による磁界が形成されるようにした反発型磁気回路が
構成され、該磁界内にボイスコイルを配置すると共に該
ボイスコイルよりも下方側で振動板及びダンパの内径部
をコイルボビンに接合してなるスピーカにおいて、反発
型磁気回路の上部を覆うように金属からなるほぼドーム
状の覆い部材を配置したことを特徴とする。According to a first aspect of the present invention, there is provided a loudspeaker according to the first aspect, wherein two magnets are arranged so that the same poles are opposed to each other, and a magnetic field due to repulsive magnetic flux is formed on the outer periphery of the magnets. A speaker having a voice coil disposed in the magnetic field and having an inner diameter portion of a diaphragm and a damper joined to a coil bobbin below the voice coil. An approximately dome-shaped cover member made of metal is arranged so as to cover an upper part of the cover.
【００１０】これにより、ボイスコイルの近くに金属か
らなる覆い部材があるから該ボイスコイルから発生する
熱を放熱することができ、また、覆い部材自体にダスト
キャップやディフューザーとしての機能をもたせること
ができる。[0010] Thus, since the metal cover member is provided near the voice coil, heat generated from the voice coil can be dissipated, and the cover member itself can function as a dust cap or a diffuser. it can.
【００１１】請求項２記載のものにおいては、覆い部材
がアルミ等の放熱性に優れた材料であることを特徴とす
る。According to a second aspect of the present invention, the cover member is made of a material having excellent heat dissipation such as aluminum.
【００１２】これにより、ボイスコイルからの発熱をよ
り効果的に放熱することができる。Thus, heat generated from the voice coil can be more effectively radiated.
【００１３】請求項３記載のものにおいては、覆い部材
が磁性材料からなり、該覆い部材の外周下端部がボイス
コイルの外周近傍に延びていることを特徴とする。According to a third aspect of the present invention, the cover member is made of a magnetic material, and the lower end of the outer periphery of the cover member extends near the outer periphery of the voice coil.
【００１４】これにより、反発磁束の磁束密度を高める
ことができ、薄型のスピーカでありながら、従来のアウ
ターリングを配置したものと同様の機能をもたせること
ができる。Thus, the magnetic flux density of the repulsive magnetic flux can be increased, and the same function as that in which the conventional outer ring is arranged can be provided even though the speaker is thin.
【００１５】請求項４記載のものにおいては、覆い部材
の外周下端縁に防塵布が取り付けられていることを特徴
とする。According to a fourth aspect of the present invention, a dustproof cloth is attached to a lower edge of the outer periphery of the cover member.
【００１６】これにより、覆い部材によるダストキャッ
プとしての機能をより高めることができる。Thus, the function of the cover member as a dust cap can be further enhanced.
【００１７】[0017]
【発明の実施の形態】本発明のスピーカの実施形態を図
１に基づいて説明するが、リング状のマグネット２、３
を同極側が対向するように配置すると共に両マグネット
２、３間にセンタープレート４を介在させて反発型磁気
回路１が構成されること、該センタープレート４の外周
側にボイスコイル５を配置すること、振動板６及びダン
パ７の内径部がボイスコイル５の下方においてコイルボ
ビン５ａに接合されること、磁気回路はホルダー９で保
持されること、フレーム１０の一端部に端子１３が取り
付けられること等は図３に基づいて説明した従来のもの
と同様の構成である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a speaker according to the present invention will be described with reference to FIG.
Are arranged so that the same poles are opposed to each other, and a repulsion type magnetic circuit 1 is formed by interposing a center plate 4 between the two magnets 2 and 3. A voice coil 5 is arranged on the outer peripheral side of the center plate 4. That the inner diameters of the diaphragm 6 and the damper 7 are joined to the coil bobbin 5a below the voice coil 5, that the magnetic circuit is held by the holder 9, that the terminal 13 is attached to one end of the frame 10, etc. Has the same configuration as the conventional one described with reference to FIG.
【００１８】本発明においては、反発型磁気回路１の上
部を覆うように、金属からなるほぼドーム状の覆い部材
１４を配置する。この覆い部材１４にはほぼドーム状を
なす本体の下面中央から支柱部１５が突成されており、
該支柱部１５の下部にはネジ部１５ａが形成されていて
該ネジ部１５ａをホルダー９のポール部９ａに形成した
ネジ穴にネジ込んで取り付けるようになっている。１７
はマグネット２の上面を押えるワッシャである。In the present invention, a substantially dome-shaped cover member 14 made of metal is disposed so as to cover the upper portion of the repulsion type magnetic circuit 1. A strut portion 15 is formed on the cover member 14 from the center of the lower surface of the substantially dome-shaped main body.
A screw portion 15a is formed in a lower portion of the support portion 15, and the screw portion 15a is screwed into a screw hole formed in the pole portion 9a of the holder 9 and attached. 17
Is a washer for pressing the upper surface of the magnet 2.
【００１９】前記覆い部材１４の筒状外周部１６は前記
ボイスコイル５の近傍まで延びており、該筒状外周部１
７の先端には防塵布１８が取り付けられている。The cylindrical outer peripheral portion 16 of the covering member 14 extends to the vicinity of the voice coil 5, and the cylindrical outer peripheral portion 1
A dust-proof cloth 18 is attached to the tip of 7.
【００２０】前記覆い部材１４は伝熱効果を有する金属
材であればその材質を問わないが、例えば、アルミ材等
で形成すれば放熱効果をより高めることができ、また、
鉄等の磁性材で形成すればセンタープレート４の外周に
生じる反発磁束の磁束密度を高めることができ、これに
より薄型化のために配置されていなかった従来のアウタ
ーリングの機能と同様の機能をもたせることができる。The covering member 14 may be made of any material as long as it is a metal material having a heat transfer effect.
If it is formed of a magnetic material such as iron, the magnetic flux density of the repulsive magnetic flux generated on the outer periphery of the center plate 4 can be increased, thereby providing the same function as the function of the conventional outer ring which is not arranged for thinning. Can be given.
【００２１】[0021]
【発明の効果】本発明のスピーカによれば、請求項１記
載のものにおいては、反発型磁気回路を用いると共に振
動板及びダンパの内径部をボイスコイルの下方側でコイ
ルボビンに接合してなるスピーカにおいて、ボイスコイ
ルから発生する熱を放熱することができ、また、覆い部
材自体にダストキャップやディフューザーとしての機能
をもたせることができる。According to the loudspeaker of the present invention, the loudspeaker according to the first aspect uses a repulsion type magnetic circuit and has the inner diameters of the diaphragm and the damper joined to the coil bobbin below the voice coil. In the above, the heat generated from the voice coil can be radiated, and the cover member itself can have a function as a dust cap or a diffuser.
【００２２】請求項２記載のものにおいては、ボイスコ
イルからの発熱をより効果的に放熱することができる。According to the second aspect, heat generated from the voice coil can be more effectively radiated.
【００２３】請求項３記載のものにおいては、反発磁束
の磁束密度を高めることができ、薄型のスピーカであり
ながら、従来のアウターリングを配置したものと同様の
機能をもたせることができる。According to the third aspect of the present invention, the magnetic flux density of the repulsive magnetic flux can be increased, and a thin speaker can have the same function as a conventional speaker with an outer ring.
【００２４】請求項４記載のものにおいては、覆い部材
によるダストキャップとしての機能をより高めることが
できる。According to the fourth aspect, the function as a dust cap by the covering member can be further enhanced.
【図１】本発明のスーカの実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of a suka according to the present invention.
【図２】従来の反発磁気回路型スピーカの例を示す断面
図。FIG. 2 is a sectional view showing an example of a conventional repulsion magnetic circuit type speaker.
【図３】従来の反発磁気回路型スピーカの他の例を示す
断面図。FIG. 3 is a sectional view showing another example of a conventional repulsion magnetic circuit type speaker.
１ 反発型磁気回路 ２ マグネット ３ マグネット ４ センタープレート ５ ボイスコイル ５ａ コイルボビン ６ 振動板 ７ ダンパ １４ 覆い部材 １５ 支柱部 １５ａ ネジ部 １６ 筒状外周部 １７ ワッシャ １８ 防塵布 DESCRIPTION OF SYMBOLS 1 Repulsion type magnetic circuit 2 Magnet 3 Magnet 4 Center plate 5 Voice coil 5a Coil bobbin 6 Diaphragm 7 Damper 14 Covering member 15 Support part 15a Screw part 16 Cylindrical outer peripheral part 17 Washer 18 Dustproof cloth
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０４Ｒ 9/04 １０５ Ｈ０４Ｒ 9/04 １０５Ａ １０５Ｂ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI H04R 9/04 105 H04R 9/04 105A 105B
Claims (4)
うに配置してマグネットの外周に反発磁束による磁界が
形成されるようにした反発型磁気回路が構成され、該磁
界内にボイスコイルを配置すると共に該ボイスコイルよ
りも下方側で振動板及びダンパの内径部をコイルボビン
に接合してなるスピーカにおいて、反発型磁気回路の上
部を覆うように金属からなるほぼドーム状の覆い部材を
配置したことを特徴とするスピーカ。1. A repulsion type magnetic circuit in which two magnets are arranged so that the same poles face each other to form a magnetic field due to a repulsive magnetic flux on the outer periphery of the magnets, and a voice coil is arranged in the magnetic field. And a substantially dome-shaped cover member made of metal is arranged so as to cover an upper portion of the repulsion type magnetic circuit in the speaker having the inner diameter portions of the diaphragm and the damper joined to the coil bobbin below the voice coil. A speaker characterized by the above-mentioned.
料であることを特徴とする請求項１記載のスピーカ。2. The loudspeaker according to claim 1, wherein the covering member is made of a material having excellent heat dissipation such as aluminum.
材の外周下端部がボイスコイルの外周近傍に延びている
ことを特徴とする請求項１記載のスピーカ。3. The speaker according to claim 1, wherein the cover member is made of a magnetic material, and a lower end portion of the outer periphery of the cover member extends near the outer periphery of the voice coil.
けられていることを特徴とする請求項１、２及び３記載
のスピーカ。4. The speaker according to claim 1, wherein a dust-proof cloth is attached to an outer peripheral lower end edge of the cover member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18740697A JP3559832B2 (en) | 1997-06-27 | 1997-06-27 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18740697A JP3559832B2 (en) | 1997-06-27 | 1997-06-27 | Speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1127772A true JPH1127772A (en) | 1999-01-29 |
| JP3559832B2 JP3559832B2 (en) | 2004-09-02 |
Family
ID=16205481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18740697A Expired - Lifetime JP3559832B2 (en) | 1997-06-27 | 1997-06-27 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3559832B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003092323A1 (en) * | 2002-04-25 | 2003-11-06 | Koninklijke Philips Electronics N.V. | Electromagnetic driving unit for a loudspeaker assembly |
| WO2010018932A3 (en) * | 2008-08-15 | 2010-05-27 | Shin Jong Youl | Speaker |
| KR100992964B1 (en) | 2008-08-11 | 2010-11-08 | 주식회사 성주음향 | A speaker having valley type cone |
-
1997
- 1997-06-27 JP JP18740697A patent/JP3559832B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003092323A1 (en) * | 2002-04-25 | 2003-11-06 | Koninklijke Philips Electronics N.V. | Electromagnetic driving unit for a loudspeaker assembly |
| KR100992964B1 (en) | 2008-08-11 | 2010-11-08 | 주식회사 성주음향 | A speaker having valley type cone |
| WO2010018932A3 (en) * | 2008-08-15 | 2010-05-27 | Shin Jong Youl | Speaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3559832B2 (en) | 2004-09-02 |
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