JP4661666B2 - Speaker and electronic device using it - Google Patents

Speaker and electronic device using it Download PDF

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JP4661666B2
JP4661666B2 JP2006105949A JP2006105949A JP4661666B2 JP 4661666 B2 JP4661666 B2 JP 4661666B2 JP 2006105949 A JP2006105949 A JP 2006105949A JP 2006105949 A JP2006105949 A JP 2006105949A JP 4661666 B2 JP4661666 B2 JP 4661666B2
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plate
voice coil
magnetic
speaker
magnet
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JP2007281910A (en
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浩司 佐野
哲 伊藤
昌志 川邊
俊之 小池
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は薄型タイプの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 thin type speaker and an electronic apparatus using the same.

携帯機器などの電子機器においては薄型化が要求されるため、その本体内に内蔵させるスピーカも薄型化が要求されることになる。   Since electronic devices such as portable devices are required to be thin, a speaker built in the main body is also required to be thin.

スピーカの薄型化を図るためには、その磁気回路を形成するための磁石を小型化することが当然のように行われているが、磁石を小さくすると磁力が小さくなり、その結果として音声出力も小さくなってしまうので、実際は磁石をあまり小さくはできない状態になっている（例えば、このような従来技術は下記特許文献１に記載されている。）。
特開２００５−５１２８３号公報 In order to reduce the thickness of the speaker, it is natural to reduce the size of the magnet for forming the magnetic circuit. However, if the magnet is made smaller, the magnetic force becomes smaller, and as a result, audio output is also reduced. Since it becomes small, the magnet cannot actually be made very small (for example, such a conventional technique is described in Patent Document 1 below).
JP 2005-51283 A

上述のごとく従来から、携帯機器などの電子機器に内蔵させるタイプのスピーカは薄型化が図られているが、音声出力が小さくなってしまうのを避けるべく、実際には磁石をあまり小さくはできないのが実態で、その結果として十分に満足できる薄型化が行なえていないという問題があった。   As described above, the type of speaker built into an electronic device such as a portable device has been conventionally reduced in thickness, but in order to avoid a decrease in audio output, the magnet cannot actually be made too small. However, as a result, there has been a problem that the thickness has not been sufficiently satisfied.

そこで本発明は薄型化が図れ、しかも音声出力を高めるようにすることを目的にするものである。   Therefore, the present invention aims to reduce the thickness and enhance the sound output.

そしてこの目的を達成するために本発明は、磁気ギャップを介して水平方向、または略水平方向に配置した第一、第二の板状磁石と、前記磁気ギャップに可動自在に配置したボイスコイルと、このボイスコイルに結合した振動板とを備え、前記第一の板状磁石は、その板端に磁極を形成し、前記第二の板状磁石は、その厚み方向の両端に磁極を形成し、前記磁気ギャップにおけるボイスコイル部分においては、このボイスコイル部分に対して磁束が略直交する構成としたものである。   In order to achieve this object, the present invention includes first and second plate magnets arranged in a horizontal direction or a substantially horizontal direction through a magnetic gap, and a voice coil movably arranged in the magnetic gap. And a diaphragm coupled to the voice coil, wherein the first plate-shaped magnet forms a magnetic pole at the plate end, and the second plate-shaped magnet forms a magnetic pole at both ends in the thickness direction. In the voice coil portion in the magnetic gap, the magnetic flux is substantially orthogonal to the voice coil portion.

以上のように本発明は、磁気ギャップを介して水平方向、または略水平方向に配置した第一、第二の板状磁石と、前記磁気ギャップに可動自在に配置したボイスコイルと、このボイスコイルに結合した振動板とを備え、前記第一の板状磁石は、その板端に磁極を形成し、前記第二の板状磁石は、その厚み方向の両端に磁極を形成し、前記磁気ギャップにおけるボイスコイル部分においては、このボイスコイル部分に対して磁束が略直交する構成としたスピーカであって、磁気ギャップを介して磁気ギャップ水平方向、または略水平方向に配置したので、薄型化が図れ、しかも磁気ギャップの両側に第一、第二の板状磁石を配置したので、磁力を高めて音声出力を高めることもできるものとなる。   As described above, the present invention includes the first and second plate magnets arranged in the horizontal direction or the substantially horizontal direction through the magnetic gap, the voice coil movably arranged in the magnetic gap, and the voice coil. The first plate magnet has a magnetic pole formed at its plate end, and the second plate magnet has a magnetic pole formed at both ends in the thickness direction, and the magnetic gap The voice coil portion of the speaker is configured so that the magnetic flux is substantially perpendicular to the voice coil portion, and is arranged in the horizontal direction or the substantially horizontal direction of the magnetic gap via the magnetic gap. Moreover, since the first and second plate magnets are arranged on both sides of the magnetic gap, it is possible to increase the magnetic force and increase the sound output.

以下本発明の一実施形態を、電子機器として携帯電話を例にし、添付図面を用いて説明する。   Hereinafter, an embodiment of the present invention will be described using a cellular phone as an example of an electronic device with reference to the accompanying drawings.

図１において、１は本体で、この本体１には蓋２が開閉自在に結合されている。この図１における背面側から見ると一般的な携帯電話と同じように本体１には操作ボタン（図示せず）が設けられ、また蓋２には液晶式の表示部（図示せず）が設けられている。   In FIG. 1, reference numeral 1 denotes a main body, and a lid 2 is coupled to the main body 1 so as to be freely opened and closed. When viewed from the back side in FIG. 1, the main body 1 is provided with operation buttons (not shown), and the lid 2 is provided with a liquid crystal display (not shown), as in a general mobile phone. It has been.

また、本体１の外面側には図１のごとく２個のカバー３が設けられ、これらのカバー３の背面側の本体１内には図２、図３に示したスピーカ４が実装されている。   Further, two covers 3 are provided on the outer surface side of the main body 1 as shown in FIG. 1, and the speaker 4 shown in FIGS. 2 and 3 is mounted in the main body 1 on the back side of these covers 3. .

スピーカ４は図３に示すように非磁性体であるステンレス３０１により形成された表面側のプレート５と、磁性体である冷間圧延鋼板により形成されたプレート６との間に、プレート６側からプレート５に向けて順にネオジウム製の板状磁石７、磁性体である冷間圧延鋼板により形成されたリング８、ＰＥＩ樹脂フィルムにより形成された振動板９、銅線などにより形成されたボイスコイル１０、磁性体である冷間圧延鋼板により形成されたリング１１、ネオジウム製の２枚の板状磁石１２を順次配置している。   As shown in FIG. 3, the speaker 4 is provided between the plate 6 on the surface side formed of stainless steel 301 which is a non-magnetic material and the plate 6 formed of cold-rolled steel plate which is a magnetic material, from the plate 6 side. A plate magnet 7 made of neodymium, a ring 8 formed of a cold-rolled steel plate as a magnetic material, a diaphragm 9 formed of a PEI resin film, a voice coil 10 formed of copper wire, etc. A ring 11 formed of a cold-rolled steel plate, which is a magnetic material, and two plate magnets 12 made of neodymium are sequentially arranged.

なお、プレート５の表面の一部と各部の外周側は図５、図６のごとく、樹脂製のフレーム１３で覆っている。   Part of the surface of the plate 5 and the outer peripheral side of each part are covered with a resin frame 13 as shown in FIGS.

図３、図５、図６に示すように、上記プレート６は長円形状で、その長手方向中心軸部分の長方形状の固定部６Ａには、長方形状の板状磁石７が固定され、固定部６Ａの両側には長方形状の開口部６Ｂが形成されている。   As shown in FIGS. 3, 5, and 6, the plate 6 has an oval shape, and a rectangular plate-shaped magnet 7 is fixed to a rectangular fixing portion 6 </ b> A at the central axis portion in the longitudinal direction. Rectangular openings 6B are formed on both sides of the portion 6A.

またプレート６の外周部分にはリング８が磁束が通過できる状態で固定されている。   A ring 8 is fixed to the outer peripheral portion of the plate 6 so that magnetic flux can pass therethrough.

さらにリング８上には振動板９の外周が載せられ、振動板９の外周部にはリング１１が載せられた状態になっている。   Further, the outer periphery of the diaphragm 9 is placed on the ring 8, and the ring 11 is placed on the outer periphery of the diaphragm 9.

また、振動板９上面で、上記プレート６の開口部６Ｂに対向する部分には、上記２枚の板状磁石１２が固定されている。   The two plate magnets 12 are fixed to a portion of the upper surface of the diaphragm 9 that faces the opening 6B of the plate 6.

また振動板９上面で、板状磁石７の外周に対応する部分には、図６に示すように長円形状のボイスコイル１０が固定されている。   In addition, an elliptical voice coil 10 is fixed to a portion of the upper surface of the diaphragm 9 corresponding to the outer periphery of the plate magnet 7 as shown in FIG.

以上のように構成された状態で、ネオジウム製の２枚の板状磁石１２は、図７に示すごとく、その長手方向内側端部がＮ極、外側端部がＳ極に磁化されている。   In the state configured as described above, the two plate magnets 12 made of neodymium are magnetized such that the inner end in the longitudinal direction is an N pole and the outer end is an S pole as shown in FIG.

また、ネオジウム製の板状磁石７は、図７に示すごとく、その厚み方向の表面側がＳ極、厚み方向の下面側がＮ極に磁化されている。   Further, as shown in FIG. 7, the neodymium plate magnet 7 is magnetized such that the surface side in the thickness direction is an S pole and the lower surface side in the thickness direction is an N pole.

この結果、図４と図７に示すごとくネオジウム製の２枚の板状磁石１２のそれぞれの内側のＮ極から出た磁束（図４においては図面の煩雑感を避けるために一方の板状磁石１２から出た磁束だけを記載している）は、内方へと略水平に進行してボイスコイル１０を略直交状態で横切り、次に板状磁石７上面のＳ極に進入する（なお、板状磁石１２と７は水平、または略水平状態に配置されていると説明しているが、この略水平状態とは図６に示したように板状磁石１２と７の厚み方向が一部水平方向で重なった状態、および両者が厚み方向で一部水平方向で重なってはいないが接近した状態も含んだものである。つまり、磁束をボイスコイル１０に略直交するように進行させることが重要で、その点で水平状態には若干の幅が設定されるものである。）。   As a result, as shown in FIGS. 4 and 7, the magnetic flux emitted from the N pole inside each of the two plate magnets 12 made of neodymium (in FIG. 4, one plate magnet is used in order to avoid the complicated feeling of the drawing. (Only the magnetic flux from 12 is shown) travels substantially horizontally inward, crosses the voice coil 10 in a substantially orthogonal state, and then enters the S pole on the upper surface of the plate magnet 7 (note that The plate-like magnets 12 and 7 are described as being arranged in a horizontal or substantially horizontal state, but this substantially horizontal state means that the thickness direction of the plate-like magnets 12 and 7 is partially as shown in FIG. This includes a state where they are overlapped in the horizontal direction, and a state in which they are not partially overlapped in the horizontal direction in the thickness direction but are close to each other. It is important that the horizontal state has a slight width at that point A.).

その後、板状磁石７下面のＮ極から出た磁束はプレート６の長方形状の固定部６Ａを進行し、リング８、振動板９の外周部を通過後にリング１１に進入し、次にこのリング１１を例えば４分の１週進行後、このリング１１の内周に図６のごとく固定されている板状磁石１２の外周Ｓ極へと進入することとなる。   Thereafter, the magnetic flux emitted from the N pole on the lower surface of the plate-shaped magnet 7 travels through the rectangular fixed portion 6A of the plate 6, enters the ring 11 after passing through the outer periphery of the ring 8 and the diaphragm 9, and then enters this ring. 11, for example, after a quarter of a week, the outer periphery S pole of the plate magnet 12 fixed to the inner periphery of the ring 11 as shown in FIG.

そして以上の磁束の流れがそのまま磁気回路となり、この磁気回路内で板状磁石１２の内側Ｎ極と板状磁石７の上面Ｓ極間が磁気ギャップとなり、この磁気ギャップでボイスコイル１０は電磁界駆動力が与えられ、これによりボイスコイル１０が固定された振動板９に振動が伝えられ、音声出力が発せられることになる。   The flow of the magnetic flux directly becomes a magnetic circuit, and a magnetic gap is formed between the inner N pole of the plate magnet 12 and the upper surface S pole of the plate magnet 7 in the magnetic circuit. A driving force is applied, whereby vibration is transmitted to the diaphragm 9 to which the voice coil 10 is fixed, and sound output is generated.

ここで再び磁気ギャップにおける磁束の進行について説明する。   Here, the progression of the magnetic flux in the magnetic gap will be described again.

図４と図７に示す板状磁石１２のそれぞれの内側のＮ極から出た磁束は、磁気ギャップにおいて内方へと略水平に進行し、ボイスコイル１０を略直交状態で横切るということは電磁界駆動力を大きくするために非常に重要なことであり、本実施の形態において大きな特徴点となっている。   The magnetic flux emitted from the N pole inside each of the plate magnets 12 shown in FIGS. 4 and 7 travels substantially inward in the magnetic gap and crosses the voice coil 10 in a substantially orthogonal state. This is very important for increasing the field driving force, and is a major feature of the present embodiment.

本実施の形態において、磁束が磁気ギャップにおいて内方へと略水平に進行し、ボイスコイル１０を略直交状態で横切る理由について考察する。   In the present embodiment, the reason why the magnetic flux travels substantially inward in the magnetic gap and crosses the voice coil 10 in a substantially orthogonal state will be considered.

一般的に考えると、板状磁石１２のＮ極から出た磁束は、距離的に短い板状磁石７の上面のＳ極へと斜めに進行しようとするが（この場合磁束はボイスコイル１０をわずかながら斜めに横切ることになる）、板状磁石７の下面のＮ極の反発を受けることで、実際にはその反発力で持ち上げられ、その結果として本実施の形態においては、磁束が磁気ギャップにおいて内方へと略水平に進行し、ボイスコイル１０を略直交状態で横切るものと考えられる。   Generally speaking, the magnetic flux emitted from the N pole of the plate magnet 12 tends to travel obliquely toward the S pole on the upper surface of the plate magnet 7 with a short distance (in this case, the magnetic flux passes through the voice coil 10). In this embodiment, as a result, the magnetic flux is lifted by the magnetic gap by receiving the repulsion of the N pole on the lower surface of the plate magnet 7. It is considered that it travels substantially inward in the direction and crosses the voice coil 10 in a substantially orthogonal state.

さて本実施の形態では上述のごとく磁気ギャップの両側に板状磁石１２，７を設けたので、いわゆる磁力が大きくなり、その結果として上記振動板９による音声出力も大きなものとすることができる。   In the present embodiment, since the plate magnets 12 and 7 are provided on both sides of the magnetic gap as described above, the so-called magnetic force is increased, and as a result, the sound output by the diaphragm 9 can be increased.

また、磁力を大きくするための板状磁石１２，７は文字通り板状でそれ自体が薄型のものであるので、結果として全体形状を非常に薄いものとすることができる。   Further, since the plate-like magnets 12 and 7 for increasing the magnetic force are literally plate-like and thin themselves, as a result, the overall shape can be made very thin.

以上のように本発明は、磁気ギャップを介して水平方向、または略水平方向に配置した第一、第二の板状磁石と、前記磁気ギャップに可動自在に配置したボイスコイルと、このボイスコイルに結合した振動板とを備え、前記第一の板状磁石は、その板端に磁極を形成し、前記第二の板状磁石は、その厚み方向の両端に磁極を形成し、前記磁気ギャップにおけるボイスコイル部分においては、このボイスコイル部分に対して磁束が略直交する構成としたスピーカであって、磁気ギャップを介して磁気ギャップ水平方向、または略水平方向に配置したので、薄型化が図れ、しかも磁気ギャップの両側に第一、第二の板状磁石を配置したので、磁力を高めて音声出力を高めることもできるものとなる。   As described above, the present invention includes the first and second plate magnets arranged in the horizontal direction or the substantially horizontal direction through the magnetic gap, the voice coil movably arranged in the magnetic gap, and the voice coil. The first plate magnet has a magnetic pole formed at its plate end, and the second plate magnet has a magnetic pole formed at both ends in the thickness direction, and the magnetic gap The voice coil portion of the speaker is configured so that the magnetic flux is substantially perpendicular to the voice coil portion, and is arranged in the horizontal direction or the substantially horizontal direction of the magnetic gap via the magnetic gap. Moreover, since the first and second plate magnets are arranged on both sides of the magnetic gap, it is possible to increase the magnetic force and increase the sound output.

この結果、携帯電話等の携帯機器には非常に活用しやすいものとなる。   As a result, it becomes very easy to use for portable devices such as mobile phones.

本発明の一実施形態を携帯電話に適用した斜視図The perspective view which applied one Embodiment of this invention to the mobile telephone 本発明の一実施形態を携帯電話に適用した斜視図The perspective view which applied one Embodiment of this invention to the mobile telephone 同スピーカの分解斜視図Exploded perspective view of the speaker 同スピーカの分解斜視図Exploded perspective view of the speaker 同スピーカを長手方向で切断した断面図Sectional view of the speaker cut in the longitudinal direction 同スピーカを短手方向で切断した断面図Sectional view of the speaker cut in the short direction 図６のＡ部分の拡大断面図FIG. 6 is an enlarged cross-sectional view of part A

符号の説明Explanation of symbols

１ 本体
４ スピーカ
７ 板状磁石
１２ 板状磁石 DESCRIPTION OF SYMBOLS 1 Main body 4 Speaker 7 Plate magnet 12 Plate magnet

Claims (8)

磁気ギャップを介して水平方向、または略水平方向に配置した第一、第二の板状磁石と、前記磁気ギャップに可動自在に配置したボイスコイルと、このボイスコイルに結合した振動板とを備え、前記第一の板状磁石は、その板端に磁極を形成し、前記第二の板状磁石は、その厚み方向の両端に磁極を形成し、前記磁気ギャップにおけるボイスコイル部分においては、このボイスコイル部分に対して磁束が略直交する構成としたスピーカ。 First and second plate magnets arranged horizontally or substantially horizontally through a magnetic gap, a voice coil movably arranged in the magnetic gap, and a diaphragm coupled to the voice coil The first plate-shaped magnet forms a magnetic pole at the plate end, the second plate-shaped magnet forms a magnetic pole at both ends in the thickness direction, and the voice coil portion in the magnetic gap A loudspeaker configured such that the magnetic flux is substantially orthogonal to the voice coil portion. 第一、第二の板状磁石は磁気回路形成体で磁気的に連結した請求項１に記載のスピーカ。 The speaker according to claim 1, wherein the first and second plate magnets are magnetically coupled by a magnetic circuit forming body. 第一、第二の板状磁石はそれぞれ長方形とし、これら長方形状の第一、第二の板状磁石の長手方向を磁気ギャップを介して略対向させた請求項１、または請求項２に記載のスピーカ。 The first and second plate magnets are each rectangular, and the longitudinal directions of the rectangular first and second plate magnets are substantially opposed to each other via a magnetic gap. Speaker. 長方形状の第二の板状磁石の長手方向両側に、それぞれ磁気ギャップを介して長方形状の第一の板状磁石を、その長手方向を略対向させて配置した請求項３に記載のスピーカ。 The speaker according to claim 3, wherein the rectangular first plate magnets are arranged on both sides in the longitudinal direction of the rectangular second plate magnet with their longitudinal directions substantially opposite to each other via a magnetic gap. ボイスコイルは平面形状を略長円形状とし、この略長円形状のボイスコイルの両側の長辺を、長方形状の第二の板状磁石の両側の磁気ギャップに配置した請求項４に記載のスピーカ。 5. The voice coil according to claim 4, wherein a planar shape of the voice coil is a substantially oval shape, and long sides on both sides of the substantially oval voice coil are arranged in magnetic gaps on both sides of the rectangular second plate magnet. Speaker. 第一の板状磁石の、第二の板状磁石への対向側端部をＮ極とした請求項１から５のいずれか一つに記載のスピーカ。 The speaker according to any one of claims 1 to 5, wherein an end of the first plate magnet facing the second plate magnet is an N pole. 請求項１から請求項６のいずれか１つに記載のスピーカを本体内に内蔵した電子機器。 An electronic device in which the speaker according to any one of claims 1 to 6 is built in a main body. 請求項１から請求項６のいずれか１つに記載のスピーカを平面形状が矩形状とし、このスピーカを本体内に内蔵させた電子機器。 An electronic apparatus comprising the speaker according to any one of claims 1 to 6 having a rectangular planar shape and having the speaker built in the main body.
JP2006105949A 2006-04-07 2006-04-07 Speaker and electronic device using it Expired - Fee Related JP4661666B2 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0534797U (en) * 1991-10-11 1993-05-07 オンキヨー株式会社 Magnetic circuit for speaker
JP2000032589A (en) * 1998-07-10 2000-01-28 Sony Corp Loudspeaker
JP2002335597A (en) * 2001-05-09 2002-11-22 Citizen Electronics Co Ltd Combination speaker
JP2003032786A (en) * 2001-07-13 2003-01-31 Orient Sound Kk Rectangular speaker
JP2003102092A (en) * 2001-09-19 2003-04-04 Hosiden Corp Electroacoustic transducer
JP2004343603A (en) * 2003-05-19 2004-12-02 Matsushita Electric Ind Co Ltd Speaker
JP2005051283A (en) * 2003-05-30 2005-02-24 Pioneer Electronic Corp Speaker and method of manufacturing the same
JP2005102166A (en) * 2003-08-19 2005-04-14 Matsushita Electric Ind Co Ltd Loudspeaker

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0534797U (en) * 1991-10-11 1993-05-07 オンキヨー株式会社 Magnetic circuit for speaker
JP2000032589A (en) * 1998-07-10 2000-01-28 Sony Corp Loudspeaker
JP2002335597A (en) * 2001-05-09 2002-11-22 Citizen Electronics Co Ltd Combination speaker
JP2003032786A (en) * 2001-07-13 2003-01-31 Orient Sound Kk Rectangular speaker
JP2003102092A (en) * 2001-09-19 2003-04-04 Hosiden Corp Electroacoustic transducer
JP2004343603A (en) * 2003-05-19 2004-12-02 Matsushita Electric Ind Co Ltd Speaker
JP2005051283A (en) * 2003-05-30 2005-02-24 Pioneer Electronic Corp Speaker and method of manufacturing the same
JP2005102166A (en) * 2003-08-19 2005-04-14 Matsushita Electric Ind Co Ltd Loudspeaker

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