JPH1075498A - Acoustic reproducing device - Google Patents
Acoustic reproducing deviceInfo
- Publication number
- JPH1075498A JPH1075498A JP8248886A JP24888696A JPH1075498A JP H1075498 A JPH1075498 A JP H1075498A JP 8248886 A JP8248886 A JP 8248886A JP 24888696 A JP24888696 A JP 24888696A JP H1075498 A JPH1075498 A JP H1075498A
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- muffling
- reproducing
- sound
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/026—Transducers having separately controllable opposing diaphragms, e.g. for ring-tone and voice
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は音響再生装置に関
し、特に、再生用スピーカの背面から放射される音が前
面に回りこむのを防止するための消音用のスピーカを備
え、良好な高音質再生および低音質再生が行われる音響
再生装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing apparatus, and more particularly, to a sound reproducing apparatus provided with a sound deadening speaker for preventing sound radiated from a rear surface of a reproducing speaker from reaching a front surface of the sound reproducing device. The present invention also relates to a sound reproducing device for performing low-quality sound reproduction.
【０００２】[0002]
【従来の技術】従来からスピーカシステムでは、スピー
カユニットがキャビネットに取り付けられている。この
構造ではキャビネットが小さいと背面の空気のコンプラ
イアンスが小さくなり、振動板の振動が制限を受けてし
まい、その結果スピーカの最低共振周波数ｆ0 が高くな
って低音が出なくなってしまう。さらに前後のコンプラ
イアンスが異なるため前後均等に振幅せず歪みを生じて
しまう。2. Description of the Related Art Conventionally, in a speaker system, a speaker unit is mounted on a cabinet. Compliance of air and back cabinet is smaller in this structure is reduced, the vibration of the vibrating plate will be restricted, no longer out bass result becomes higher minimum resonance frequency f 0 of the speaker. In addition, since the front and rear compliances are different, the amplitude is not evenly distributed in the front and rear, and distortion occurs.
【０００３】従って、これを改善するには極めて大きい
キャビネットが必要となる。また他の構造として後面解
放タイプのものがあるが、この構造ではスピーカの前後
の空気のコンプライアンスが同じで、これによる歪みは
生じないものの、後ろに放射された音が前に回り込ん
で、前に放射される音と干渉を起こして特性が乱れた
り、低音が減少してしまう等の問題があった。このよう
な現象を防ぐ為には数ｍ四方のバッフルが必要となった
りして実用上不具合があった。[0003] To improve this, an extremely large cabinet is required. There is also a rear open type as another structure. In this structure, the air compliance before and after the loudspeaker is the same. There is a problem that interference occurs with the sound radiated to the device, the characteristics are disturbed, and the bass is reduced. In order to prevent such a phenomenon, a baffle of several meters square was required, and there was a problem in practice.
【０００４】この問題を解決するために本出願人が出願
した（特願平８−１２２２９８号）スピーカシステムで
は、背面を解放にしてｆ0 を上げずに空気のコンプライ
アンスによる振動歪みも生じないようにした状態に再生
用スピーカを設置し、さらに、再生用スピーカの背面か
ら出た音が前面へ回り込まないように打ち消してしまう
消音用スピーカを設置した音響再生装置を提案してい
る。このように再生用スピーカの背面に消音用スピーカ
を設置したスピーカシステムは図３に示すように、再生
用スピーカの磁気回路１６と消音用スピーカの磁気回路
１７とが別々に設けられ、夫々フレーム１０に支持され
た構造となっている。In order to solve this problem, in the speaker system filed by the present applicant (Japanese Patent Application No. 8-122298), vibration distortion due to air compliance is prevented without releasing the rear surface and increasing f 0. A sound reproducing device is proposed in which a reproduction speaker is installed in a state where the sound is reproduced, and a sound-reduction speaker is installed in which sound emitted from the back of the reproduction speaker is canceled so as not to go to the front. As shown in FIG. 3, the speaker system in which the silencing speaker is installed on the back of the reproducing speaker is provided with the reproducing speaker magnetic circuit 16 and the silencing speaker magnetic circuit 17 separately, as shown in FIG. It is a structure supported by.
【０００５】[0005]
【発明が解決しようとする課題】上記した従来の音響再
生装置では、スピーカシステムに再生用スピーカの磁気
回路と消音用スピーカの磁気回路とが別々に設けられて
いるために奥行きが長くなって小型化が難しく、さらに
製造コストが高くなるという問題があった。In the above-described conventional sound reproducing apparatus, since the magnetic circuit of the reproducing speaker and the magnetic circuit of the muffling speaker are separately provided in the speaker system, the depth becomes longer and the size becomes smaller. However, there has been a problem that the production is difficult and the production cost is high.
【０００６】本発明はこの問題を解決するためになされ
たものであり、その目的は小型のスピーカシステムを用
いても良好な音質再生および低音再生が行われ、しかも
製造コストが安い音響再生装置を提供することである。The present invention has been made to solve this problem, and an object of the present invention is to provide an acoustic reproducing apparatus which can reproduce sound with good sound quality and low sound even with a small speaker system, and which has a low manufacturing cost. To provide.
【０００７】[0007]
【課題を解決するための手段】この発明の音響再生装置
は、再生用のスピーカの後方に消音用のスピーカを同軸
に配置し、前記再生用スピーカの背面から放射される音
を前面に回り込まないように前記消音用スピーカの放射
音で打ち消すようにしたスピーカシステムにおいて、前
記再生用スピーカと前記消音用スピーカに共通の磁気回
路を用いたものである。According to the sound reproducing apparatus of the present invention, a muffling speaker is arranged coaxially behind a reproducing speaker so that sound radiated from the back of the reproducing speaker does not go to the front. Thus, in the speaker system in which the sound emitted from the muffling speaker cancels out, a magnetic circuit common to the reproduction speaker and the muffling speaker is used.
【０００８】また、前記音響再生装置において、前記磁
気回路として反発磁界を用いたものである。Further, in the sound reproducing apparatus, a repulsive magnetic field is used as the magnetic circuit.
【０００９】また、前記音響再生装置において、前記再
生用スピーカの振動板および前記消音用スピーカの振動
板をボイスコイルに直接に固定したものである。In the above-mentioned sound reproducing apparatus, the diaphragm of the reproducing speaker and the diaphragm of the muffling speaker are directly fixed to a voice coil.
【００１０】さらに、前記各音響再生装置において、前
記再生用スピーカの振動板をコーン形状とし、前記消音
用スピーカの振動板を平面形状としたものである。Further, in each of the sound reproducing devices, the diaphragm of the reproducing speaker has a cone shape, and the diaphragm of the muffling speaker has a planar shape.
【００１１】上記構成において、磁気回路が１つとなる
のでスピーカシステムの奥行きを小さくすることがで
き、また、製造コストを安くすることができる。磁気回
路として高価なネオジウムマグネット等の反発磁界を用
いた場合コスト削減効果が特に大きくなる。さらに、消
音用スピーカの振動板を平面形状とすることによりスペ
ース削減効果が特に大きくなる。In the above configuration, since there is only one magnetic circuit, the depth of the speaker system can be reduced, and the manufacturing cost can be reduced. When a repulsive magnetic field such as an expensive neodymium magnet is used as the magnetic circuit, the cost reduction effect is particularly large. Further, by making the diaphragm of the sound deadening speaker a planar shape, the effect of space reduction is particularly large.
【００１２】[0012]
【発明の実施の形態】本発明に係る実施例を図面に基づ
いて説明する。図１は本発明の第１の実施例である音響
再生装置のスピーカシステムを示す断面図である。図に
おいて、１は再生用スピーカの振動板、２は消音用スピ
ーカの振動板、３はフェライトマグネット１１で構成し
た磁気回路、４は再生用スピーカのボイスコイル、５は
消音用スピーカのボイスコイル、６は再生用スピーカの
ボイスコイルボビン、７は消音用スピーカのボイスコイ
ルボビンである。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a speaker system of a sound reproducing apparatus according to a first embodiment of the present invention. In the figure, 1 is a diaphragm of a reproducing speaker, 2 is a diaphragm of a muffling speaker, 3 is a magnetic circuit composed of a ferrite magnet 11, 4 is a voice coil of a muffling speaker, 5 is a voice coil of a muffling speaker, Reference numeral 6 denotes a voice coil bobbin of a reproducing speaker, and reference numeral 7 denotes a voice coil bobbin of a muffling speaker.
【００１３】再生用スピーカのボイスコイルボビン６お
よび消音用スピーカのボイスコイルボビン７は夫々再生
用スピーカの振動板１および消音用スピーカの振動板２
に固定されいる。フレーム１０は各振動板および磁気回
路を支持する。そして、再生用スピーカのボイスコイル
ボビン６に巻かれたボイスコイル４および消音用スピー
カのボイスコイルボビン７に巻かれたボイスコイル５は
夫々再生用スピーカ側の磁気ギャップ８および消音用ス
ピーカ側の磁気ギャップ９に配置される。The voice coil bobbin 6 of the reproducing speaker and the voice coil bobbin 7 of the muffling speaker are respectively a diaphragm 1 of the reproducing speaker and a muffler 2 of the muffling speaker.
Is fixed to. The frame 10 supports each diaphragm and a magnetic circuit. The voice coil 4 wound around the voice coil bobbin 6 of the reproducing speaker and the voice coil 5 wound around the voice coil bobbin 7 of the silencing speaker are respectively a magnetic gap 8 on the reproducing speaker side and a magnetic gap 9 on the silencing speaker side. Placed in
【００１４】再生用スピーカの振動板１の背面からの音
はフレーム１０の穴１０ａから放射されるが、消音用ス
ピーカの振動板で発生され、フレーム１０の穴１０ｂか
ら放射される音により消音される。再生用スピーカと消
音用スピーカの振動系は、消音動作時には同相で動き振
幅も略同等であるからその間隔を大きくする必要はな
く、上記のような構造が可能である。このような構造に
より、再生用のスピーカと消音用のスピーカが夫々別の
磁気回路を持つことなく、１つの磁気回路で駆動され
る。従って、従来の磁気回路を２個用いたスピーカシス
テムに比べて、スピーカの奥行きは略２／３となり、ま
た、磁気回路のコストも安くなる。The sound from the back of the diaphragm 1 of the reproducing speaker is radiated from the hole 10a of the frame 10, but is generated by the diaphragm of the silencing speaker and is muted by the sound radiated from the hole 10b of the frame 10. You. Since the vibration systems of the reproduction speaker and the muffling speaker have the same phase and the same motion amplitude during the muffling operation, it is not necessary to increase the interval therebetween, and the above-described structure is possible. With such a structure, the reproducing speaker and the muffling speaker are driven by one magnetic circuit without having separate magnetic circuits. Therefore, compared to a conventional speaker system using two magnetic circuits, the depth of the speaker is approximately 2/3, and the cost of the magnetic circuit is reduced.
【００１５】再生用スピーカの振動板１はコーンタイプ
であるが、消音用スピーカの振動板２は平面形状となっ
ている。再生用のスピーカはできるだけ広い帯域を再生
する必要があるため、分割振動を利用して高域まで再生
できるようにコーンタイプの振動板を用いたが、消音用
のスピーカは、再生スピーカの背面に放射された音のう
ち波長が長く前面に回り込んでも音圧が低下せず前面に
放射された音を打ち消すような低域のみを消音すればよ
いので平面形状とした。これにより、スピーカシステム
をさらに薄型とすることができ、しかも、高域の再生帯
域を従来のものと同等にすることができた。The diaphragm 1 of the reproducing speaker is of a cone type, while the diaphragm 2 of the muffling speaker has a planar shape. Since the speaker for reproduction needs to reproduce the band as wide as possible, a cone-type diaphragm is used so that it can reproduce to a high frequency by using divided vibration, but the speaker for silencing is mounted on the back of the reproduction speaker. Even if the wavelength of the radiated sound is long and goes around the front surface, the sound pressure does not decrease and only the low range that cancels the sound radiated to the front surface needs to be silenced. As a result, the speaker system can be made thinner, and the high-frequency reproduction band can be made equal to the conventional one.
【００１６】図２は本発明の第２の実施例である音響再
生装置のスピーカシステムを示す断面図である。第２の
実施例では第１の実施例における磁気回路をネオジウム
マグネット１２、１２…を用いた反発磁気回路１３で置
き換え、さらに、再生用スピーカのボイスコイル１４お
よび消音用スピーカのボイスコイル１５を夫々再生用ス
ピーカの振動板１および消音用スピーカの振動板２に直
接固定した構造している。他の構成は第１の実施例と同
様である。このような構成により第１の実施例よりもさ
らにスピーカシステムを薄型とすることができた。FIG. 2 is a sectional view showing a speaker system of a sound reproducing apparatus according to a second embodiment of the present invention. In the second embodiment, the magnetic circuit of the first embodiment is replaced by a repulsive magnetic circuit 13 using neodymium magnets 12, 12,..., And a voice coil 14 of a reproducing speaker and a voice coil 15 of a muffling speaker are respectively provided. The structure is directly fixed to the diaphragm 1 of the reproduction speaker and the diaphragm 2 of the muffling speaker. Other configurations are the same as those of the first embodiment. With such a configuration, the speaker system can be made thinner than in the first embodiment.
【００１７】なお、従来のスピーカの磁気回路ではマグ
ネットを通常２個使用するが、本例では３個使用してい
る。それでも磁気回路を２個用いる場合よりもマグネッ
トは１個少ない。ネオジウムマグネットは高価であるの
でコスト削減効果は大きい。In a conventional speaker magnetic circuit, two magnets are usually used, but in this embodiment, three magnets are used. Still, there is one less magnet than when using two magnetic circuits. Since the neodymium magnet is expensive, the cost reduction effect is great.
【００１８】[0018]
【発明の効果】本発明の音響再生装置によると、再生用
スピーカと消音用スピーカとで磁気回路を共用させたの
で、従来のものに比べて奥行きが略２／３となり、ま
た、コストも削減される。According to the sound reproducing apparatus of the present invention, since the magnetic circuit is shared between the reproducing speaker and the muffling speaker, the depth is reduced to about 2/3 and the cost is reduced as compared with the conventional one. Is done.
【００１９】さらに、消音用スピーカの振動板を平面形
状とすることにより、より薄型化を図りながら従来のも
のと同等の高域再生を実現できる。Further, by forming the diaphragm of the sound deadening speaker into a planar shape, high-frequency reproduction equivalent to that of a conventional one can be realized while further reducing the thickness.
【図１】本発明の第１の実施例である音響再生装置のス
ピーカシステムを示す断面図である。FIG. 1 is a cross-sectional view showing a speaker system of a sound reproducing device according to a first embodiment of the present invention.
【図２】本発明の第２の実施例である音響再生装置のス
ピーカシステムを示す断面図である。FIG. 2 is a cross-sectional view showing a speaker system of an audio reproducing device according to a second embodiment of the present invention.
【図３】従来の音響再生装置のスピーカシステムの例を
示す断面図である。FIG. 3 is a cross-sectional view illustrating an example of a speaker system of a conventional sound reproducing device.
１ 再生用スピーカの振動板 ２ 消音用スピーカの振動板 ３ 磁気回路 ４ 再生用スピーカのボイスコイル ５ 消音用スピーカのボイスコイル ６ 再生用スピーカのボイスコイルボビン ７ 消音用スピーカのボイスコイルボビン ８ 再生用スピーカ側の磁気ギャップ ９ 消音用スピーカ側の磁気ギャップ １０ フレーム １１ フェライトマグネット １２ ネオジウムマグネット １３ 反発磁気回路 １４ 再生用スピーカのボイスコイル １５ 消音用スピーカのボイスコイル １６ 再生用スピーカの磁気回路 １７ 消音用スピーカの磁気回路 REFERENCE SIGNS LIST 1 reproduction speaker diaphragm 2 sound reduction speaker diaphragm 3 magnetic circuit 4 reproduction speaker voice coil 5 sound reduction speaker voice coil 6 reproduction speaker voice coil bobbin 7 sound reduction speaker voice coil bobbin 8 reproduction speaker side 9 Magnetic gap of silencing speaker side 10 Frame 11 Ferrite magnet 12 Neodymium magnet 13 Repulsive magnetic circuit 14 Voice coil of reproducing speaker 15 Voice coil of silencing speaker 16 Magnetic circuit of reproducing speaker 17 Magnet of silencing speaker circuit
Claims (4)
ーカを同軸に配置し、前記再生用スピーカの背面から放
射される音を前面に回り込まないように前記消音用スピ
ーカの放射音で打ち消すようにしたスピーカシステムに
おいて、前記再生用スピーカと前記消音用スピーカは共
通の磁気回路を用いることを特徴とする音響再生装置。1. A sound elimination speaker is coaxially disposed behind a reproduction speaker, and a sound radiated from a rear surface of the reproduction speaker is canceled by a sound radiated by the noise elimination speaker so as not to go to a front surface. In the speaker system described above, the reproducing speaker and the muffling speaker use a common magnetic circuit.
あることを特徴とする請求項１記載の音響再生装置。2. The sound reproducing apparatus according to claim 1, wherein said magnetic circuit uses a repulsive magnetic field.
消音用スピーカの振動板はボイスコイルに直接に固定さ
れたことを特徴とする請求項２記載の音響再生装置。3. The sound reproducing device according to claim 2, wherein the diaphragm of the reproduction speaker and the diaphragm of the muffling speaker are directly fixed to a voice coil.
状であり、前記消音用スピーカの振動板は平面形状であ
る請求項１、２または３記載の音響再生装置。4. The sound reproducing device according to claim 1, wherein the diaphragm of the speaker for reproduction has a cone shape, and the diaphragm of the muffler speaker has a planar shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8248886A JPH1075498A (en) | 1996-08-30 | 1996-08-30 | Acoustic reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8248886A JPH1075498A (en) | 1996-08-30 | 1996-08-30 | Acoustic reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1075498A true JPH1075498A (en) | 1998-03-17 |
Family
ID=17184914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8248886A Pending JPH1075498A (en) | 1996-08-30 | 1996-08-30 | Acoustic reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1075498A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010206562A (en) * | 2009-03-04 | 2010-09-16 | Panasonic Corp | Flat speaker |
| JP2010206561A (en) * | 2009-03-04 | 2010-09-16 | Panasonic Corp | Flat speaker |
-
1996
- 1996-08-30 JP JP8248886A patent/JPH1075498A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010206562A (en) * | 2009-03-04 | 2010-09-16 | Panasonic Corp | Flat speaker |
| JP2010206561A (en) * | 2009-03-04 | 2010-09-16 | Panasonic Corp | Flat speaker |
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