JP3517328B2 - Speaker device - Google Patents
Speaker deviceInfo
- Publication number
- JP3517328B2 JP3517328B2 JP03318597A JP3318597A JP3517328B2 JP 3517328 B2 JP3517328 B2 JP 3517328B2 JP 03318597 A JP03318597 A JP 03318597A JP 3318597 A JP3318597 A JP 3318597A JP 3517328 B2 JP3517328 B2 JP 3517328B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- diaphragm
- damper
- speakers
- edge
- 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 - Fee Related
Links
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、複数のスピーカを
スピーカキャビネットに取り付けて駆動するスピーカ装
置に関するものである。
【０００２】
【従来の技術】スピーカキャビネットに２つの同じスピ
ーカを並列に接続して駆動する、いわゆるツインドライ
ブ方式のスピーカ装置がある。特に小型化が必要なスピ
ーカ装置にツインドライブ方式を用いると、限られたス
ピーカキャビネットのバッフル面で、振動板の有効面積
を効率よく大きくすることができ、変換効率や許容入力
を高めるのに有効である。
【０００３】しがしながら、再生できる低音域の周波数
を低くしたり許容入力を大きくすると、スピーカの振動
板が大きく振幅するため、振動板を支持しているエッジ
やダンパー等の支持系を大きな振幅に対して直線性が良
好になるようにしなければならない。大きな振幅に対す
る支持系の直線性を良好にすることに限界があるため、
これらを改善する有効な手段として、ツインドライブ方
式のスピーカ装置では、一方のスピーカを反対向きに取
り付け、逆相に接続してプッシュプル動作を行わせて、
それぞれのスピーカの偶数次の高調波歪を打ち消したも
のがある。（例えば、特開平７ー２８８８８４号公報の
図１２に示す。）
【０００４】
【発明が解決しようとする課題】しかしながら、上述の
従来例に示すように、一方のスピーカを反対向きに取り
付け、逆相に接続してプッシュプル動作を行わせると、
磁気回路が聴受する側に向くため、音圧周波数特性や指
向特性に乱れを生じる。また、視覚的にも好ましくな
い。
【０００５】本発明のスピーカ装置では、磁気回路を聴
受する側に向けることなく振動板の支持系に起因する偶
数次の高調波歪を低減することを目的としている。
【０００６】
【０００７】
【０００８】
【課題を解決するための手段】本発明の請求項１に記載
のスピーカ装置は、振動板を支持するエッジ及びダンパ
ーを有するスピーカを偶数個用いるスピーカ装置におい
て、前記エッジ及びダンパーで振動板を支持する第１の
スピーカと、該第１のスピーカのダンパーを裏返した形
状のダンパーで振動板を支持する第２のスピーカを備
え、前記第１のスピーカと前記第２のスピーカとによる
少なくとも１組のスピーカをスピーカキャビネットに取
り付けたものである。
【０００９】したがって、第１のスピーカのダンパーに
起因する偶数次の高調波歪を、第２のスピーカのダンパ
ーで打ち消すことができる。
【００１０】
【００１１】
【００１２】
【発明の実施の形態】図１は、本発明のスピーカ装置の
一実施例を示す断面構成図である。図１において、第１
のスピーカ１は、断面形状が凸状のロールエッジ２が振
動板３の開口端に貼着され、振動板３のネック部に断面
形状が波形をしたダンパー４を取り付けている。そし
て、振動板３のネック部に固着したボイスコイル５が磁
気回路６の磁気空隙中に遊嵌され、ボイスコイル５に印
加した駆動電流によって動作するようになっている。
【００１３】また、第２のスピーカ７は、同じ材質で断
面形状が第１のスピーカ１の凸状のロールエッジ２を裏
返した形状に成形した断面形状が凹状のロールエッジ８
を、第１のスピーカ１の振動板と同じ振動板３の開口端
に貼着し、振動板３のネック部に第１のスピーカ１に取
り付けたダンパー４を裏返して取り付けている。そし
て、振動板３のネック部に固着した第１のスピーカ１と
同じボイスコイル５が第１のスピーカ１と同じ磁気回路
６の磁気空隙中に遊嵌され、ボイスコイル５に印加した
駆動電流によって動作するようになっている。
【００１４】スピーカキャビネット９のバッフル面に取
り付けた第１のスピーカ１と第２のスピーカ７は、並列
に結線されて同相で駆動するようになっている。
【００１５】第１のスピーカ１の凸状のロールエッジ２
に対して第２のスピーカ７の凹状のロールエッジ８は第
１のスピーカ１の凸状のロールエッジ２を裏返して取り
付けた構成になる。したがって、相反する動きとなりプ
ッシュプル動作となって、それぞれのエッジの偶数次の
高調波歪を打ち消すことができる。
【００１６】また、第２のスピーカ７のダンパー４も第
１のスピーカ１のダンパーに対して裏返しに取り付けて
いるので、エッジと同様にプッシュプル動作となって、
それぞれのダンパーの偶数次の高調波歪を打ち消すこと
ができる。
【００１７】図２の第２高調波歪の音圧周波数特性図で
詳述する。第１のスピーカ１と第２のスピーカ７を１２
ｃｍのコーン型スピーカとし、スピーカキャビネット９
に取り付けて並列駆動したときの第２高調波歪の音圧周
波数特性を実線で示す。また、第１のスピーカ１を２つ
用いて並列駆動したときの第２高調波歪の音圧周波数特
性を破線で示す。図２に示すように本発明の構成によれ
ば、最低共振周波数付近の振幅が大きくなる周波数にお
いて顕著な改善がみられ、第２高調波歪を約６ｄＢ程度
低減することができる。
【００１８】また、図３に他の実施例の断面構成図を示
す。図３において、スピーカキャビネット１０に第１の
スピーカ１と第２のスピーカ７を互いの磁気回路間に間
隙を介して背中合わせに対向させて配置したものであ
る。そして、互いの振動板が相反する方向に振動するよ
うに駆動している。さらに、第１のスピーカ１と第２の
スピーカ７の振動板３の中心軸を概ね一致するように取
り付けている。
【００１９】したがって、第１のスピーカ１と第２のス
ピーカ７を駆動すると、駆動力に対する反作用が両方の
スピーカとも相反する方向に生じるので、反作用による
機械振動を打ち消す効果がある。さらに、第１のスピー
カ１と第２のスピーカ７の振動板３の中心軸を概ね一致
するように取り付けると、機械振動によるモーメントの
発生を防止できる。
【００２０】上述の実施例では、ロールエッジで説明し
たが、断面が波形形状をしたエッジ等振動板を支持する
ものであれば、どのような構成のものでも本発明を適用
できる。また、ダンパーも同様である。また、第１のス
ピーカ１を２個、第２のスピーカ７を２個用いて直並列
に接続し、スピーカ装置の負荷インピーダンスを１個の
スピーカのときと同じにしても良い。
【発明の効果】本発明のスピーカ装置によれば、振動板
を支持する支持系の偶数次の高調波歪を低減することが
できる。また、スピーカの磁気回路を聴受する側に向け
ないので、視覚的に好ましくなり音圧周波数特性や指向
特性の乱れを防止できる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device for driving a plurality of speakers mounted on a speaker cabinet. 2. Description of the Related Art There is a so-called twin drive type speaker device in which two identical speakers are connected in parallel to a speaker cabinet and driven. In particular, if the twin drive system is used for a speaker device that needs to be miniaturized, the effective area of the diaphragm can be efficiently increased with a limited baffle surface of the speaker cabinet, which is effective for increasing the conversion efficiency and the allowable input. It is. However, if the frequency of the low-frequency range that can be reproduced is lowered or the allowable input is increased, the diaphragm of the speaker will have a large amplitude, so that the supporting system such as the edge supporting the diaphragm and the damper must be large. The linearity should be good for the amplitude. Because there is a limit to good linearity of the support system for large amplitudes,
As an effective means to improve these, in a twin drive type speaker device, one of the speakers is mounted in the opposite direction and connected in the opposite phase to perform the push-pull operation,
Some speakers cancel even-order harmonic distortion of each speaker. (For example, as shown in FIG. 12 of Japanese Patent Application Laid-Open No. 7-288884.) However, as shown in the above conventional example, one speaker is mounted in the opposite direction, and By connecting to the phase and performing push-pull operation,
Since the magnetic circuit is directed to the listening side, the sound pressure frequency characteristics and the directional characteristics are disturbed. Also, it is not visually desirable. An object of the speaker device of the present invention is to reduce even-order harmonic distortion caused by a support system of a diaphragm without directing a magnetic circuit to a listening side. SUMMARY OF THE INVENTION [0008] A first aspect of the present invention is described.
The speaker device, the speaker apparatus using an even number of absent speakers that have a edge and a damper for supporting the diaphragm, the first speaker and, first speaker damper for supporting the diaphragm at the edge and the damper And a second speaker that supports the diaphragm with a damper having a shape turned upside down, wherein at least one set of the first speaker and the second speaker is attached to a speaker cabinet . Therefore, even-order harmonic distortion caused by the damper of the first speaker can be canceled by the damper of the second speaker. FIG. 1 is a sectional view showing an embodiment of a speaker device according to the present invention. In FIG. 1, the first
In the speaker 1, a roll edge 2 having a convex cross-sectional shape is attached to an opening end of a diaphragm 3, and a damper 4 having a corrugated cross-sectional shape is attached to a neck portion of the diaphragm 3. Then, the voice coil 5 fixed to the neck of the diaphragm 3 is loosely fitted in the magnetic gap of the magnetic circuit 6, and operates by the drive current applied to the voice coil 5. The second speaker 7 is formed of a roll edge 8 having the same material as that of the first speaker 1 and having a concave cross section formed by turning the convex roll edge 2 of the first speaker 1 upside down.
Is attached to the opening end of the diaphragm 3 which is the same as the diaphragm of the first speaker 1, and the damper 4 attached to the first speaker 1 is attached to the neck of the diaphragm 3 in a reverse manner. Then, the same voice coil 5 as the first speaker 1 fixed to the neck portion of the diaphragm 3 is loosely fitted in the magnetic gap of the same magnetic circuit 6 as the first speaker 1, and the drive current applied to the voice coil 5 It is supposed to work. The first speaker 1 and the second speaker 7 attached to the baffle surface of the speaker cabinet 9 are connected in parallel and driven in phase. The convex roll edge 2 of the first speaker 1
On the other hand, the concave roll edge 8 of the second speaker 7 has a configuration in which the convex roll edge 2 of the first speaker 1 is turned upside down. Accordingly, the motions are in opposition to each other, and the push-pull operation is performed, so that even-order harmonic distortion of each edge can be canceled. Since the damper 4 of the second speaker 7 is also installed upside down with respect to the damper of the first speaker 1, the push-pull operation is performed similarly to the edge.
Even-order harmonic distortion of each damper can be canceled. A detailed description will be given of a sound pressure frequency characteristic diagram of the second harmonic distortion shown in FIG. The first speaker 1 and the second speaker 7 are 12
cm cone type speaker and speaker cabinet 9
The sound pressure frequency characteristics of the second harmonic distortion when mounted in parallel and driven in parallel are shown by solid lines. The broken line shows the sound pressure frequency characteristic of the second harmonic distortion when two first speakers 1 are driven in parallel. As shown in FIG. 2, according to the configuration of the present invention, a remarkable improvement is seen at a frequency where the amplitude near the lowest resonance frequency increases, and the second harmonic distortion can be reduced by about 6 dB. FIG. 3 shows a cross-sectional view of another embodiment. In FIG. 3, a first speaker 1 and a second speaker 7 are arranged in a speaker cabinet 10 so as to face each other with a gap between their magnetic circuits back to back. Then, the vibration plates are driven so as to vibrate in opposite directions. Further, the first speaker 1 and the second speaker 7 are attached such that the central axes of the diaphragms 3 substantially coincide with each other. Therefore, when the first speaker 1 and the second speaker 7 are driven, a reaction to the driving force occurs in a direction opposite to that of the two speakers, so that there is an effect of canceling the mechanical vibration due to the reaction. Further, when the first speaker 1 and the second speaker 7 are attached so that the center axes of the diaphragms 3 are substantially coincident with each other, generation of a moment due to mechanical vibration can be prevented. In the above embodiment, the roll edge is described. However, the present invention can be applied to any structure that supports a diaphragm such as an edge having a corrugated cross section. The same applies to the damper. Alternatively, two first speakers 1 and two second speakers 7 may be connected in series and parallel, and the load impedance of the speaker device may be the same as that of one speaker. According to the speaker device of the present invention, even-order harmonic distortion of the support system for supporting the diaphragm can be reduced. In addition, since the magnetic circuit of the speaker is not directed to the listening side, it is visually unfavorable, and disturbance of sound pressure frequency characteristics and directional characteristics can be prevented.
【図面の簡単な説明】
【図１】 本発明のスピーカ装置の一実施例を示す断面
構成図である。
【図２】 本発明を説明するための第２高調波の音圧周
波数特性図である。
【図３】 本発明の他の実施例を示す断面構成図であ
る。
【符号の説明】
１ 第１のスピーカ ２ ロールエ
ッジ
３ 振動板 ４ ダンパー
５ ボイスコイル ６ 磁気回路
７ 第２のスピーカ ８ ロールエ
ッジ
９ スピーカキャビネット １０ スピーカ
キャビネットBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional configuration diagram showing one embodiment of a speaker device of the present invention. FIG. 2 is a sound pressure frequency characteristic diagram of a second harmonic for explaining the present invention. FIG. 3 is a sectional view showing another embodiment of the present invention. [Description of Signs] 1 first speaker 2 roll edge 3 diaphragm 4 damper 5 voice coil 6 magnetic circuit 7 second speaker 8 roll edge 9 speaker cabinet 10 speaker cabinet
Claims (1)
有するスピーカを偶数個用いるスピーカ装置において、
前記エッジ及びダンパーで振動板を支持する第１のスピ
ーカと、該第１のスピーカのダンパーを裏返した形状の
ダンパーで振動板を支持する第２のスピーカを備え、前
記第１のスピーカと前記第２のスピーカとによる少なく
とも１組のスピーカをスピーカキャビネットに取り付け
たことを特徴とするスピーカ装置。(57) in the speaker apparatus using an even number of answering speaker that Yusuke <br/> edges and dampers for supporting the Patent Claims 1. A diaphragm,
A first speaker that supports the diaphragm with the edge and the damper, and a second speaker that supports the diaphragm with a damper having a shape obtained by turning the damper of the first speaker upside down, wherein the first speaker and the second speaker A speaker device, wherein at least one set of speakers including two speakers is attached to a speaker cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03318597A JP3517328B2 (en) | 1997-01-31 | 1997-01-31 | Speaker device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03318597A JP3517328B2 (en) | 1997-01-31 | 1997-01-31 | Speaker device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10224883A JPH10224883A (en) | 1998-08-21 |
| JP3517328B2 true JP3517328B2 (en) | 2004-04-12 |
Family
ID=12379446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03318597A Expired - Fee Related JP3517328B2 (en) | 1997-01-31 | 1997-01-31 | Speaker device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3517328B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017104118A1 (en) * | 2015-12-17 | 2017-06-22 | パナソニックＩｐマネジメント株式会社 | Speaker device |
| JP2022119087A (en) * | 2021-02-03 | 2022-08-16 | 船井電機株式会社 | Display device and speaker unit |
-
1997
- 1997-01-31 JP JP03318597A patent/JP3517328B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10224883A (en) | 1998-08-21 |
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