JP2008263418A - Speaker and electronic equipment using the same - Google Patents

Speaker and electronic equipment using the same Download PDF

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JP2008263418A
JP2008263418A JP2007104776A JP2007104776A JP2008263418A JP 2008263418 A JP2008263418 A JP 2008263418A JP 2007104776 A JP2007104776 A JP 2007104776A JP 2007104776 A JP2007104776 A JP 2007104776A JP 2008263418 A JP2008263418 A JP 2008263418A
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yoke
speaker
diaphragm
magnet
voice coil
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JP4877025B2 (en
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Satoru Ito
哲 伊藤
Koji Sano
浩司 佐野
Kazuki Honda
一樹 本田
Masashi Kawabe
昌志 川邊
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a speaker without deteriorating sound output from the speaker. <P>SOLUTION: The speaker is provided with a magnet 7, a first yoke 11 arranged in the approximately horizontal direction of the magnet 7 and being a magnetic circuit forming body, a second yoke 12 arranged on the lower end portion of the first yoke 11 and magnetically coupled with the first yoke 11, a voice coil 14 which is movably arranged in a magnetic gap 13 formed between the first yoke 11 and the magnet 7, and a diaphragm 15 for supporting the voice coil 14. Since the circumferential part of the diaphragm 15 is held by the first yoke 11 and the second yoke 12, it is unnecessary to arrange a frame for holding the diaphragm 15 on the outsides of the yokes or the frame can be miniaturized, thereby the speaker can be miniaturized. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、スピーカとそれを用いた電子機器に関するものである。   The present invention relates to a speaker and an electronic device using the speaker.

現在、携帯電話や薄型テレビがますます小型化され、そしてそれらの電化製品に内蔵させるタイプのスピーカにおいても小型化が要求されている。   At present, cellular phones and flat-screen televisions are increasingly miniaturized, and miniaturization is also required for the types of speakers built into these electric appliances.

図３に示す従来のスピーカは、断面コの字状のヨーク１と、このヨーク１の内底部中央に配置されるマグネット２と、このマグネット２とヨーク１が形成する磁気ギャップ３に可動自在に配置されたボイスコイル４と、このボイスコイル４を支持する振動板５と、この振動板５の外周部が接続されたフレーム６とを備えていた。   The conventional speaker shown in FIG. 3 is movable in a U-shaped yoke 1, a magnet 2 disposed in the center of the inner bottom of the yoke 1, and a magnetic gap 3 formed by the magnet 2 and the yoke 1. The arranged voice coil 4, the diaphragm 5 that supports the voice coil 4, and the frame 6 to which the outer periphery of the diaphragm 5 is connected were provided.

そして、このような構成のスピーカにおいては、マグネット２や振動板５を小さくすることでスピーカ全体の小型化を図っていた。   And in the speaker of such a structure, size reduction of the whole speaker was aimed at by making the magnet 2 and the diaphragm 5 small.

なお、本発明の先行技術文献としては、例えば、特許文献１が挙げられる。
特開２００４−８８２９６号公報 In addition, as a prior art document of this invention, patent document 1 is mentioned, for example.
JP 2004-88296 A

しかしながら、磁力は磁石の大きさと比例するため、上記従来のスピーカにおいて小型化のためにマグネット２を小さくすると、マグネット２の磁力が小さくなってしまい、その結果、十分に満足できるほどの音声出力をスピーカから得ることができないという問題点があった。   However, since the magnetic force is proportional to the size of the magnet, if the magnet 2 is made smaller in order to reduce the size of the conventional speaker, the magnetic force of the magnet 2 is reduced, and as a result, a sound output that is sufficiently satisfactory can be obtained. There was a problem that it could not be obtained from the speaker.

また、振動板５を小さくした場合では、振動板５は十分な音声出力を得るだけの振幅を確保できないという問題点があった。   Further, when the diaphragm 5 is made small, there is a problem that the diaphragm 5 cannot secure an amplitude sufficient to obtain a sufficient sound output.

そこで、本発明は音声出力を低下させることなく、スピーカを小型化することを目的とする。   Accordingly, an object of the present invention is to reduce the size of a speaker without reducing the sound output.

そして、この目的を達成するために本発明は、マグネットと、このマグネットの略水平方向に配置されるとともに磁気回路形成体である第一のヨークと、この第一のヨークの下端部に配置され、磁気的に連結した第二のヨークと、第一のヨークとマグネットの間に形成される磁気ギャップに可動自在に配置されたボイスコイルと、このボイスコイルに接続された振動板とを備え、この振動板の外周部は前記第一のヨーク及び前記第二のヨークにて挟持された構成とした。   In order to achieve this object, the present invention is provided with a magnet, a first yoke that is disposed in a substantially horizontal direction of the magnet, and a magnetic circuit forming body, and a lower end portion of the first yoke. A magnetically coupled second yoke, a voice coil movably disposed in a magnetic gap formed between the first yoke and the magnet, and a diaphragm connected to the voice coil, The outer peripheral portion of the diaphragm was sandwiched between the first yoke and the second yoke.

上記構成により本発明は、音声出力を低下させることなく、スピーカを小型化することができる。   With the above configuration, the present invention can reduce the size of the speaker without reducing the audio output.

すなわち、本発明は、従来のスピーカのように振動板をフレームに接続するのではなく、ヨークに接続することが可能な構成としたことにより、ヨークの外側にフレームを設ける必要がなくなる、あるいはフレームを小型化できるという効果を有する。この結果、音声出力を低下させることなく、スピーカ全体を小型化することができるのである。   That is, according to the present invention, since the diaphragm can be connected to the yoke instead of connecting to the frame like a conventional speaker, it is not necessary to provide a frame outside the yoke, or the frame Can be reduced in size. As a result, the entire speaker can be reduced in size without reducing the audio output.

（実施の形態１）
以下、本発明の実施の形態１におけるスピーカの構成について図面を用いて説明する。 (Embodiment 1)
Hereinafter, the configuration of the speaker according to Embodiment 1 of the present invention will be described with reference to the drawings.

図１において、マグネット７は下部プレート８の底部中央に配置され、さらに、マグネット７の上部には上部プレート９が載置されている。これら下部プレート８および上部プレート９は金属で形成され、マグネット７とともに磁気回路体１０の一部を構成している。   In FIG. 1, the magnet 7 is disposed at the center of the bottom of the lower plate 8, and the upper plate 9 is placed on the magnet 7. The lower plate 8 and the upper plate 9 are made of metal and constitute a part of the magnetic circuit body 10 together with the magnet 7.

また、第一のヨーク１１も磁気回路体１０の一部を構成しており、図１に示すように上部プレート９およびマグネット７の略水平方向に配置されている。   The first yoke 11 also constitutes a part of the magnetic circuit body 10 and is arranged in the substantially horizontal direction of the upper plate 9 and the magnet 7 as shown in FIG.

さらに、第一のヨーク１１の下部には矩形状の第二のヨーク１２が配置されている。この第二のヨーク１２も磁気回路体１０の一部である。   Further, a rectangular second yoke 12 is disposed below the first yoke 11. The second yoke 12 is also a part of the magnetic circuit body 10.

すなわち、本発明の実施の形態１においてはマグネット７、上部プレート９、第一のヨーク１１、第二のヨーク１２、および下部プレート８が磁気回路体１０を形成しており、この磁気回路体１０が第一のヨーク１１と下部プレート９の間に形成する磁気ギャップ１３には長形円状のボイスコイル１４が配置されている。   That is, in the first embodiment of the present invention, the magnet 7, the upper plate 9, the first yoke 11, the second yoke 12, and the lower plate 8 form the magnetic circuit body 10, and this magnetic circuit body 10 In the magnetic gap 13 formed between the first yoke 11 and the lower plate 9, a long circular voice coil 14 is disposed.

また、このボイスコイル１４は振動板１５にて支持されている。この振動板１５においてボイスコイル１４の接続位置より外側の部分にあたるエッジ部１５ａは、図１に示すように第一のヨーク１１の下面側において、第一のヨーク１１の配置方向とは逆方向に突出して設けられており、さらに、エッジ部１５ａの外周端部は第一のヨーク１１及び第二のヨーク１２にて挟持され固定されている。ここで、第一のヨーク１１の形状を図１に示すように断面Ｌ字状とし、さらにエッジ部１５ａを覆うように設けているため、第一のヨーク１１の内周端部は第二のヨーク１２の内周端部よりもマグネットに近い位置にある。   The voice coil 14 is supported by a diaphragm 15. An edge portion 15a corresponding to a portion outside the connection position of the voice coil 14 in the diaphragm 15 is opposite to the arrangement direction of the first yoke 11 on the lower surface side of the first yoke 11 as shown in FIG. Furthermore, the outer peripheral end portion of the edge portion 15 a is sandwiched and fixed by the first yoke 11 and the second yoke 12. Here, since the shape of the first yoke 11 is L-shaped as shown in FIG. 1 and is provided so as to cover the edge portion 15a, the inner peripheral end of the first yoke 11 It is in a position closer to the magnet than the inner peripheral end of the yoke 12.

なお、本実施の形態１におけるスピーカは図１（ｂ）に示すように、スピーカの背面側に背面放音孔１６を設けた背面放音タイプのものである。   In addition, the speaker in this Embodiment 1 is a back sound emission type thing which provided the back surface sound emission hole 16 in the back side of the speaker, as shown in FIG.1 (b).

以上の状態で、図１（ａ）に示すように、マグネット７の厚み方向の上面側はＮ極、厚み方向の下面側はＳ極に磁化されている。   In the above state, as shown in FIG. 1A, the upper surface side in the thickness direction of the magnet 7 is magnetized to the N pole, and the lower surface side in the thickness direction is magnetized to the S pole.

この結果、マグネット７のＮ極から出た磁束は、上部プレート９を介して第一のヨーク１１を目指し、ボイスコイル１４を通過しながら略水平方向に進行する。さらに、第一のヨーク１１に到達した磁束は、第一のヨーク１１と磁気的に連結された第二のヨーク１２へと進入する経路をとる。そして、磁束は第二のヨーク１２から下部プレート８へと順に通過した後、マグネット７のＳ極へと到達する。したがってこの結果、磁気回路体１０が形成されるのである。   As a result, the magnetic flux emitted from the N pole of the magnet 7 is directed to the first yoke 11 via the upper plate 9 and travels in a substantially horizontal direction while passing through the voice coil 14. Further, the magnetic flux that has reached the first yoke 11 takes a path that enters the second yoke 12 that is magnetically coupled to the first yoke 11. Then, the magnetic flux sequentially passes from the second yoke 12 to the lower plate 8 and then reaches the S pole of the magnet 7. Therefore, as a result, the magnetic circuit body 10 is formed.

次に、本発明の実施の形態１におけるスピーカの動作および効果について述べる。   Next, the operation and effect of the speaker in Embodiment 1 of the present invention will be described.

ボイスコイル１４に音声信号を付加した電気信号を印加すると、磁気回路体１０が形成する磁気ギャップ１３内の磁界と反応し、フレミング左手の法則に従ってボイスコイル１４には上下方向に駆動力が発生する。そして、ボイスコイル１４に接続された振動板１５に駆動力が伝達し、この結果、振動板１５が振動することで音を発生させ、図１（ｂ）に示す背面放音孔１６から音声を放射する仕組みとなっている。   When an electrical signal added with a voice signal is applied to the voice coil 14, it reacts with the magnetic field in the magnetic gap 13 formed by the magnetic circuit body 10, and a driving force is generated in the voice coil 14 in the vertical direction according to the Fleming left-hand rule. . Then, the driving force is transmitted to the diaphragm 15 connected to the voice coil 14, and as a result, the diaphragm 15 vibrates to generate a sound, and the sound is emitted from the rear sound emitting hole 16 shown in FIG. It has a mechanism to radiate.

前記従来のスピーカの構成では、振動板１５を小さくすることやマグネット７を小さくすることでスピーカ全体の小型化を図る必要があり、その結果その音声出力までもが低減してしまうものであった。   In the configuration of the conventional speaker, it is necessary to reduce the size of the entire speaker by reducing the diaphragm 15 or the magnet 7, and as a result, the sound output is also reduced. .

そこで、本発明の実施の形態１では、図１に示すような構成とすることで音声出力を低下させることなくスピーカの小型化を可能なものとした。   Therefore, in the first embodiment of the present invention, it is possible to reduce the size of the speaker without reducing the audio output by adopting the configuration shown in FIG.

これは振動板１５の外周部を第一のヨーク１１及び第二のヨーク１２にて挟持した構成による。すなわち、従来のスピーカにおいては、ヨークのさらに外側に設けたフレームに振動板の外周部を接続した構成としていたが、これを本実施の形態１においては、振動板１５を第一のヨーク１１及び第二のヨーク１２にて保持可能な構成としたため、第一のヨーク１１及び第二のヨーク１２の外側に振動板１５保持のためのフレームを設ける必要がなくなる、あるいはフレームを小型化できるものである。したがって、本実施の形態１におけるスピーカは、径が小型化されている。   This is because the outer peripheral portion of the diaphragm 15 is sandwiched between the first yoke 11 and the second yoke 12. That is, in the conventional speaker, the outer peripheral portion of the diaphragm is connected to a frame provided on the outer side of the yoke. However, in the first embodiment, this is the same as the diaphragm 15 and the first yoke 11. Since it is configured to be held by the second yoke 12, it is not necessary to provide a frame for holding the diaphragm 15 outside the first yoke 11 and the second yoke 12, or the frame can be reduced in size. is there. Therefore, the diameter of the speaker according to the first embodiment is reduced.

また、エッジ部１５ａは第一のヨーク１１の下面側に配置されている。この結果、図３に示される従来のスピーカのようにエッジ部５ａを配置するためのスペース５ｂをヨーク１の上面側に設ける必要がなくなり、スピーカの厚み方向の薄型化が可能となっている。   Further, the edge portion 15 a is disposed on the lower surface side of the first yoke 11. As a result, it is not necessary to provide the space 5b for arranging the edge portion 5a on the upper surface side of the yoke 1 as in the conventional speaker shown in FIG. 3, and the speaker can be thinned in the thickness direction.

なお、本実施の形態１では第二のヨーク１２と下部プレート８を別構成としたが、これらを一体化させて断面がコの字型の皿状ヨークとしてもよい。この場合においても、上述と同様の磁気回路体１０が形成される。   In the first embodiment, the second yoke 12 and the lower plate 8 are configured separately, but they may be integrated to form a U-shaped dished yoke. Also in this case, the magnetic circuit body 10 similar to the above is formed.

また、本実施の形態１では背面放音タイプのスピーカとしたが、これは図２に示すようにスピーカの側面に側面放音孔１７を設け、側面放音タイプのスピーカとしてもよい。この場合においても、スピーカの音声出力を低下させることなく、小型化を図ることが可能である。   In the first embodiment, a rear sound emission type speaker is used. However, as shown in FIG. 2, a side sound emission hole 17 may be provided on the side surface of the speaker to provide a side sound emission type speaker. Even in this case, it is possible to reduce the size without reducing the sound output of the speaker.

以上のように、本発明によるとスピーカの音声出力を低下させることなく、小型化することが可能であり、特に携帯電話機などの小型のスピーカを搭載する電子機器において有用である。   As described above, according to the present invention, it is possible to reduce the size without reducing the sound output of the speaker, and it is particularly useful in an electronic apparatus equipped with a small speaker such as a mobile phone.

（ａ）本発明の実施の形態１における背面放音タイプのスピーカの長径方向の断面図、（ｂ）本発明の実施の形態１における背面放音タイプのスピーカの短径方向の断面図(A) A cross-sectional view in the major axis direction of the back sound emission type speaker in Embodiment 1 of the present invention, (b) A cross sectional view in the minor axis direction of the back sound emission type speaker in Embodiment 1 of the present invention 本発明の実施の形態１における側面放音タイプのスピーカの短径方向の断面図Sectional drawing of the short-diameter direction of the side surface sound emission type speaker in Embodiment 1 of this invention 従来のスピーカの断面図Cross-sectional view of a conventional speaker

符号の説明Explanation of symbols

７ マグネット
８ 下部プレート
９ 上部プレート
１０ 磁気回路体
１１ 第一のヨーク
１２ 第二のヨーク
１３ 磁気ギャップ
１４ ボイスコイル
１５ 振動板
１５ａ エッジ部
１６ 背面放音孔
１７ 側面放音孔 7 Magnet 8 Lower plate 9 Upper plate 10 Magnetic circuit body 11 First yoke 12 Second yoke 13 Magnetic gap 14 Voice coil 15 Diaphragm 15a Edge portion 16 Back sound emitting hole 17 Side sound emitting hole

Claims (6)

マグネットと、
このマグネットの略水平方向に配置されるとともに磁気回路形成体である第一のヨークと、
この第一のヨークの下端部に配置され、磁気的に連結された第二のヨークと、
前記第一のヨークと前記マグネットの間に形成される磁気ギャップに可動自在に配置されたボイスコイルと、
このボイスコイルを支持する振動板とを備え、
この振動板の外周部は前記第一のヨーク及び前記第二のヨークにて挟持されたスピーカ。 Magnets,
A first yoke which is arranged in a substantially horizontal direction of the magnet and is a magnetic circuit forming body;
A second yoke arranged at the lower end of the first yoke and magnetically coupled;
A voice coil movably disposed in a magnetic gap formed between the first yoke and the magnet;
With a diaphragm that supports this voice coil,
The outer periphery of the diaphragm is a speaker sandwiched between the first yoke and the second yoke. 前記振動板における前記ボイスコイルの接続位置より外側のエッジ部は、前記第一のヨークの下面側に配置された請求項１に記載のスピーカ。 The speaker according to claim 1, wherein an edge portion outside the connection position of the voice coil in the diaphragm is disposed on a lower surface side of the first yoke. 第二のヨークは断面コの字型の皿状である請求項１に記載のスピーカ。 The speaker according to claim 1, wherein the second yoke has a U-shaped dish shape. 第二のヨークの下方に背面放音孔を設けた請求項１に記載のスピーカ。 The speaker according to claim 1, wherein a rear sound emitting hole is provided below the second yoke. 第二のヨークの側面に側面放音孔を設けた請求項１に記載のスピーカ。 The speaker according to claim 1, wherein a side sound emitting hole is provided on a side surface of the second yoke. 請求項１〜５の何れか一つに記載のスピーカが用いられた電子機器。 An electronic device using the speaker according to any one of claims 1 to 5.
JP2007104776A 2007-04-12 2007-04-12 Speaker Expired - Fee Related JP4877025B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052799A (en) * 1983-09-02 1985-03-26 株式会社東芝 Controller for sand pump
JP2002084595A (en) * 2000-09-08 2002-03-22 Alpine Electronics Inc Speaker
JP2004032659A (en) * 2001-10-09 2004-01-29 Matsushita Electric Ind Co Ltd Electric acoustic transducer and electronic device
JP2004064158A (en) * 2002-07-25 2004-02-26 Citizen Electronics Co Ltd Electroacoustic transducer
JP2005051283A (en) * 2003-05-30 2005-02-24 Pioneer Electronic Corp Speaker and method of manufacturing the same
WO2006080405A1 (en) * 2005-01-28 2006-08-03 Matsushita Electric Industrial Co., Ltd. Electrokinetic electro-acoustic converter and electronic device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052799A (en) * 1983-09-02 1985-03-26 株式会社東芝 Controller for sand pump
JP2002084595A (en) * 2000-09-08 2002-03-22 Alpine Electronics Inc Speaker
JP2004032659A (en) * 2001-10-09 2004-01-29 Matsushita Electric Ind Co Ltd Electric acoustic transducer and electronic device
JP2004064158A (en) * 2002-07-25 2004-02-26 Citizen Electronics Co Ltd Electroacoustic transducer
JP2005051283A (en) * 2003-05-30 2005-02-24 Pioneer Electronic Corp Speaker and method of manufacturing the same
WO2006080405A1 (en) * 2005-01-28 2006-08-03 Matsushita Electric Industrial Co., Ltd. Electrokinetic electro-acoustic converter and electronic device

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