JP4419352B2

JP4419352B2 - Speaker

Info

Publication number: JP4419352B2
Application number: JP2001226143A
Authority: JP
Inventors: 敬則福山; 周平小西
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 2001-07-26
Filing date: 2001-07-26
Publication date: 2010-02-24
Anticipated expiration: 2021-07-26
Also published as: JP2003037895A

Description

【０００１】
【発明の属する技術分野】
本発明は主として携帯電話等のレシーバとして使用されるスピーカに関するものである。
【０００２】
【従来の技術】
従来の技術を図４により説明する。図４は携帯電話用のレシーバとして使用されるスピーカの分解斜視図であり、同図によると１は底面にマグネット２を装着した円筒状のヨークであり、３はマグネット２に重畳されて結合された上部プレートであり、この円筒状のヨーク１の内壁と上部プレート３の側面とでリング状の磁気ギャップ（図示せず）が構成され、これらヨーク１、マグネット２と上部プレート３とで磁気回路４が形成されている。
【０００３】
６は略中央にボイスコイル６ａを装着した振動板であり、７は上記磁気回路４をインサート成形した樹脂材からなるケースである。
【０００４】
なお、このケース７には外部接続端子８とこれに繋がったボイスコイル６ａの引出し線と接続される内部接続端子（図示せず）がインサート成形により一体化されている。
【０００５】
前記振動板６は前記ボイスコイル６ａを前記磁気回路４の磁気ギャップに嵌め込んでその外周をケース７に接着剤により接合している。
【０００６】
１０は制動布１０ａを貼り付けたプロテクターであり、共振時の振動板６の過大な振幅を抑制するものである。
【０００７】
以上のように構成されたスピーカは外部接続端子８を通じて音声信号を内部接続端子を介してボイスコイル６ａに入力し、ボイスコイル６ａを上下に駆動して振動板６を振幅させ発音するものである。
【０００８】
【発明が解決しようとする課題】
近年、携帯電話装置の多機能化の中で表示部の大型化が図られ、レシーバ部分の省スペース化要求によってより小型のスピーカが要求されてきているが、組立加工がより高精度化し、品質の安定化が困難となるとともに、音質の劣化、音圧の低下の解消が課題となってきている。
【０００９】
本発明は上記課題を解決するために狭幅の矩形型のスピーカの実用化を目指したものであり、携帯電話のスペースファクターを有効に利用して前記課題の解決を図るものである。
【００１０】
【課題を解決するための手段】
上記課題を解決するために、本発明のスピーカの請求項１に記載のものは、略矩形形状体の上下に開口面を設け、両端の短径部分に夫々一端が露出して内部接続部となり、他端を外部接続部とした端子をインサート成形した筐体と、この内部に略矩形状に巻回され、両端が前記内部接続部と電気的に接続されたボイスコイルと、前記ボイスコイルの上端面と接合されるとともに、前記上部開口面に装着された振動板と、前記下部開口面に装着され、前記ボイスコイルが嵌め込まれる磁気ギャップを設けた略矩形の磁気回路部とでスピーカを構成するとともに、前記露出部を短径の略コーナ部分に設け、少なくとも前記露出部と電気的に接続されるボイスコイルの引出し線が、ボイスコイル本体の略コーナ部近傍から外方に引き出されるとともに、その同じ短径の反対側近傍を屈曲点として露出部側に、略逆く字状に曲げられて延出されたものとしたものであり、ボイスコイルの引出し線を短径の辺を横断するように延出して設けたため、スピーカ駆動時のボイスコイルの上下動動作が円滑に行えるものである。
【００１１】
そして、ボイスコイルの引出し線を短径の反対側近傍を屈曲点として前記露出部側に延出され、略逆くの字状に曲げられて巻回されたボイスコイル本体に一体としたものであり、前記引出し線を短径側を略往復する長さまで延出したため、スピーカ駆動時のボイスコイルの上下動動作が充分確保され、スピーカとしての振動板の振幅も充分とれるものである。
【００１２】
また逆くの字状に延出されたボイスコイルの引出し線を用いることでボイスコイルの短径方向の重量バランスを確保しやすく振動板の異常振動を抑制する上でも効果を有するものである。
【００１３】
本発明のスピーカの請求項２に記載のものは、請求項１記載の引出し線がボイスコイル本体側と前記露出部との電気的接続点間が上下差を設けたものであり、ボイスコイルの上下動動作がより充分確保されて、振動板の振幅が更に充分確保されてスピーカ性能の向上が更に図れるものである。
【００１４】
本発明のスピーカの請求項３に記載のものは、請求項１または請求項２に記載の磁気回路部の磁気ギャップのコーナ部を少なくとも外方に向かって開かれたものであり、引出し線は上方から見た時、前記コーナ部を経て外方に引き出されるので、ボイスコイルの上部から下部までのどの位置から引き出されたとしても磁気回路部と当接することはなく、ボイスコイルの上下動動作が円滑に行えるものである。
【００１５】
本発明のスピーカの請求項４に記載のものは、請求項１または請求項２に記載の磁気回路部の磁気ギャップの短径側を外方に向かって開かれたものとしたものとし、ボイスコイルの引出し線をボイスコイル本体の短径側から外方に引き出すようにしたので、請求項３と同様の効果を有するものである。
【００１６】
【発明の実施の形態】
以下、本発明のスピーカの一実施の形態について図１（ａ）から図３により説明する。
【００１７】
（実施の形態１）
図１（ａ）は本発明のスピーカの一実施の形態のレシーバの分解斜視図であり、図１（ｂ）は同要部である筐体２０の裏返した状態の斜視図であり、図２は同要部である筐体とボイスコイルの関係を説明するための上面図であり、図３は同要部である磁気回路部の分解斜視図である。
【００１８】
同図によると、２０は上下の面が開口面となり樹脂成形により形成された略矩形形状の筐体であり、両端の短辺には夫々一端が筐体上に露出して内部接続部２１ａとなり、他端が外部接続部２１ｂとなる端子２１がインサート成形により前記筐体２０の成形時に一体化して形成されている。なお、前記内部接続部２１ａは前記筐体２０の短辺の端のコーナ部分に位置するように設定されるとともに、上面に必要に応じて半田被覆を行いボイスコイル２２の引出し線２２ａとの電気的接続の信頼性を確保している。
【００１９】
なお、筐体２０内に配置されたボイスコイル２２はそのボイスコイル２２の本体の略コーナ部分から引出し線２２ａが引き出され、前記筐体２０の短辺の内部接続部２１ａの反対側近傍まで延出され、屈曲部２２ｂで逆くの字状に曲げられてから前記内部接続部２１ａにその端部２２ｃが半田付接続される形状となっている。
【００２０】
また、前記引出し線２２ａは略コーナ部分から延出して屈曲部２２ｂで逆くの字状に曲げられて半田付接続されるので引出し線２２ａを長くすることでボイスコイル２２のスピーカ駆動時の上下動に対して引っ張り余裕が確保され、ボイスコイル２２の円滑な駆動を可能としている。なお、更にこの引出し線２２ａはボイスコイル２２の本体からの引出し部分と前記内部接続部２１ａ間に高低差（内部接続部２１ａを高くする）を設けることで、前記引出し線２２ａの上下動に対する引っ張り余裕を更に確保し、後述の振動板２３の振幅向上による出力の向上等スピーカとしての音響特性の向上にも寄与している。
【００２１】
また、ボイスコイル２２から逆くの字状に延出されたボイスコイルの引出し線２２ａを内部接続部２１ａに端部２２ｃを半田付接続しているので、引出し線２２ａは短径方向を往復する形で用いられ、ボイスコイル２２の短径方向の重量バランスを確保しやすく振動板２３の異常振動を抑制する上でも効果を有するものである。
【００２２】
振動板２３は前記矩形状に巻回されたボイスコイル２２の上端を中央に接着結合するとともに、その周縁を前記筐体２０に接着結合して前記筐体２０の上部開口面を覆っている。
【００２３】
２４は複数の小孔２４ａを設けたプロテクタであり、その外面に制動布２４ｂを貼り付けた状態で前記振動板２３を覆うように筐体２０に取付けられている。このプロテクタ２４によって振動板２３を外力から保護するとともに、制動布２４ｂによって振動板２３の共振時の過大な振幅を抑制している。
【００２４】
なお、プロテクタ２４に小孔２４ａを設けずにレーザ照射によって微小な孔を複数個穿孔することで制動布２４ｂを削除することが可能であり、スピーカの組立工程中にこのレーザ照射による穿孔工程を設ける事で、スピーカの音響特性の違いによる振動板２３の変更とそれに伴う共振周波数の違いによる制動布２４ｂの変更を組み立て工程におけるレーザ照射による穿孔条件の変更のみで対応し、生産性の向上、部品点数の削減に寄与することも可能である。
【００２５】
２５は矩形形状の磁気回路部であり、板状の磁性材料を折り曲げて形成したヨーク２５ａ上に矩形形状のマグネット２５ｂおよび矩形形状の上部プレート２５ｃを夫々接着結合により一体化して形成し、上部プレート２５ｃと前記ヨーク２５ａの折り曲げて形成された壁部２５ｄ間にボイスコイル２２がはまり込む磁気ギャップ２５ｅを設けている。
【００２６】
この磁気回路部２５は前述のように筐体２０に前記振動板２３によって装着されたボイスコイル２２の一部を前記磁気ギャップ２５ｅに嵌め込むように筐体２０の下面の開口部に圧入保持され、接着剤を塗布して固着される。
【００２７】
この時、前記ヨーク２５ａの壁部２５ｄは折り曲げて形成したことで各コーナ部２５ｆは空隙を持ち、前記磁気ギャップ２５ｅはこのコーナ部２５ｆで外方に向かって開口されているが、前述のボイスコイル２２のコーナ部から延出された引出し線２２ａは上方から見て前記磁気ギャップ２５ｅのコーナ部２５ｆと重なるようにして磁気回路部２５外へ引き出されている。
【００２８】
即ち、引出し線２２ａがボイスコイル２２の下端部近傍から延出される場合は、磁気ギャップ２５ｅからこのコーナ部２５ｆを通じて磁気回路部２５外に延出され、この引出し線２２ａがボイスコイル２２の上端近傍から延出される場合は、スピーカ駆動時のボイスコイル２２の上下動時または最大振幅時にこの引出し線２２ａのボイスコイル２２の本体からの引出し部分が磁気ギャップ２５ｅ内に位置する事があっても引出し線２２ａが前記磁気回路部２５と衝突することはないので、いわゆる磁気ギャップ不良といわれる異音の発生はない。
【００２９】
また、引出し線２２ａの引出し位置を磁気回路部２５との衝突を考慮することのない構成となるので、スピーカの薄型化にも寄与できるものである。
【００３０】
なお、前記ヨーク２５ａは壁部２５ｄを折り曲げて４面形成するものとして説明したが、磁気効率の若干の低下はあるが短径側の壁部を形成しない事で、磁気回路部２５の筐体２０への圧入時の位置決めが容易となり、スピーカ組立時の組立工数の向上が行えるものである。
【００３１】
また、前記実施の形態においてはボイスコイル２２は矩形状に巻回されたものを前提として説明したが、筐体２０が上下面に開口を有し、磁気回路部２５も振動板２３、ボイスコイル２２の筐体２０への装着後、圧入装着されるものであるため、ボイスコイル２２の形成を筐体２０の下開口面から筐体２０内に突出させた下型凸部（図示せず）に巻回し、ボイスコイル２２表面の熱融着層を加熱固化してボイスコイル２２を筐体２０内または若干突出させた状態で矩形形状に形成した後振動板２３への接合を行う事で、予め仕掛品としてボイスコイル２２を作製することによるボイスコイル２２の搬送時の取り扱いによる変形や取り扱いの煩雑さを回避することも可能である。
【００３２】
【発明の効果】
以上のように本発明のスピーカは構成して、携帯電話などにおいてスペースを有効に活用した狭幅の矩形型のスピーカの提供が可能となるものである。
【図面の簡単な説明】
【図１】（ａ）本発明のスピーカの一実施形態のレシーバの分解斜視図
（ｂ）同要部である筐体を裏返した状態の斜視図
【図２】同要部である筐体とボイスコイルの関係を説明するための上面図
【図３】同要部である磁気回路部の分解斜視図
【図４】従来のスピーカの分解斜視図
【符号の説明】
２０筐体
２１端子
２１ａ内部接続部
２１ｂ外部接続部
２２ボイスコイル
２２ｂ屈曲部
２３振動板
２５磁気回路部
２５ｅ磁気ギャップ
２５ｆコーナ部[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to a speaker used as a receiver of a mobile phone or the like.
[0002]
[Prior art]
The prior art will be described with reference to FIG. FIG. 4 is an exploded perspective view of a speaker used as a receiver for a mobile phone. According to the figure, 1 is a cylindrical yoke with a magnet 2 mounted on the bottom surface, and 3 is superimposed on the magnet 2 and coupled. A ring-shaped magnetic gap (not shown) is formed by the inner wall of the cylindrical yoke 1 and the side surface of the upper plate 3, and the yoke 1, the magnet 2 and the upper plate 3 form a magnetic circuit. 4 is formed.
[0003]
Reference numeral 6 denotes a diaphragm having a voice coil 6a mounted substantially at the center thereof, and 7 denotes a case made of a resin material in which the magnetic circuit 4 is insert-molded.
[0004]
In addition, the external connection terminal 8 and the internal connection terminal (not shown) connected to the lead wire of the voice coil 6a connected to the external connection terminal 8 are integrated into the case 7 by insert molding.
[0005]
The diaphragm 6 has the voice coil 6a fitted in the magnetic gap of the magnetic circuit 4, and the outer periphery thereof is joined to the case 7 with an adhesive.
[0006]
Reference numeral 10 denotes a protector to which a braking cloth 10a is attached, which suppresses an excessive amplitude of the diaphragm 6 at the time of resonance.
[0007]
The speaker configured as described above inputs an audio signal to the voice coil 6a through the external connection terminal 8 through the internal connection terminal, and drives the voice coil 6a up and down to vibrate the diaphragm 6 to generate sound. .
[0008]
[Problems to be solved by the invention]
In recent years, the size of the display unit has been increased due to the increase in the number of functions of mobile phone devices, and a smaller speaker has been required due to the demand for space saving in the receiver part. However, it is difficult to stabilize the sound quality, and the problem is to solve the deterioration of the sound quality and the decrease of the sound pressure.
[0009]
In order to solve the above-described problems, the present invention aims at practical use of a rectangular speaker having a narrow width, and intends to solve the above problems by effectively using the space factor of a mobile phone.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems, the speaker according to claim 1 of the present invention is provided with opening surfaces on the upper and lower sides of a substantially rectangular body, and one end is exposed at each of the short diameter portions at both ends to form an internal connection portion. A housing in which a terminal having the other end as an external connection portion is insert-molded, a voice coil wound in a substantially rectangular shape inside thereof, and both ends electrically connected to the internal connection portion, and the voice coil A speaker is composed of a diaphragm attached to the upper end surface and attached to the upper opening surface, and a substantially rectangular magnetic circuit portion attached to the lower opening surface and provided with a magnetic gap into which the voice coil is fitted. as well as, provided the exposed portion in a substantially corner portion of the short diameter, the at least lead wire of the exposed portion and electrically connected to the voice coil is drawn outward from a substantially corner regions of the voice coil body together , Transverse to the exposed side opposite the vicinity of the same minor axis as the bending point, which was assumed that extends bent in substantially opposite dogleg shape, the lead wire of the voice coil sides of minor Thus, the voice coil can be smoothly moved up and down when the speaker is driven.
[0011]
And the lead wire of the voice coil is integrated with the voice coil main body which is extended to the exposed part side with the vicinity of the opposite side of the short diameter as the bending point, and is bent and wound in a substantially reverse letter shape. In addition, since the lead wire is extended to a length that substantially reciprocates on the minor axis side, the vertical movement of the voice coil during driving of the speaker is sufficiently ensured, and the amplitude of the diaphragm as the speaker is sufficient.
[0012]
In addition, by using a voice coil lead wire extending in a reverse letter shape, it is easy to ensure the weight balance in the minor axis direction of the voice coil, and it is effective in suppressing abnormal vibration of the diaphragm.
[0013]
Those described in claim 2 of the speaker of the present invention are those 1 Symbol placement of lead lines claims between the electrical connection point between the exposed portion and the voice coil body is provided with a height difference, a voice coil Thus, the vertical movement operation is sufficiently ensured, the amplitude of the diaphragm is further sufficiently ensured, and the speaker performance can be further improved.
[0014]
Those described in claim 3 of the loudspeaker of the present invention is therefore also opened toward at least the outer corner portion of the magnetic gap of the magnetic circuit unit according to claim 1 or claim 2, lead line is When viewed from above, it is pulled out through the corner, so it does not come into contact with the magnetic circuit from any position from the top to the bottom of the voice coil, and the voice coil moves up and down. Can be done smoothly.
[0015]
The speaker according to claim 4 of the present invention is such that the short-diameter side of the magnetic gap of the magnetic circuit section according to claim 1 or 2 is opened outward, and the voice Since the lead wire of the coil is drawn outward from the short diameter side of the voice coil body, it has the same effect as that of the third aspect .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the speaker of the present invention will be described below with reference to FIGS.
[0017]
(Embodiment 1)
1A is an exploded perspective view of a receiver according to an embodiment of the speaker of the present invention, and FIG. 1B is a perspective view of the casing 20 which is the main part in an inverted state. FIG. 3 is a top view for explaining the relationship between the casing and the voice coil which are the main parts, and FIG. 3 is an exploded perspective view of the magnetic circuit part which is the main parts.
[0018]
According to the figure, reference numeral 20 denotes a substantially rectangular housing formed by resin molding with the upper and lower surfaces being open surfaces, and one end of each short side is exposed on the housing to form an internal connection portion 21a. The terminal 21 having the other end serving as the external connection portion 21b is integrally formed when the casing 20 is molded by insert molding. The internal connection portion 21a is set so as to be located at a corner portion at the short side end of the casing 20, and the upper surface is coated with solder as necessary to connect the lead wire 22a of the voice coil 22 to the electrical connection. The reliability of the connection is secured.
[0019]
The voice coil 22 arranged in the casing 20 is extended from the substantially corner portion of the voice coil 22 to the vicinity of the opposite side of the internal connection portion 21a on the short side of the casing 20. The end portion 22c is soldered and connected to the internal connection portion 21a after being bent and bent in a reverse shape at the bent portion 22b.
[0020]
In addition, the lead wire 22a extends from a substantially corner portion, is bent in a reverse shape at the bent portion 22b, and is soldered. Therefore, by extending the lead wire 22a, the upper and lower sides of the voice coil 22 when the speaker is driven are A pull margin is secured for the movement, and the voice coil 22 can be driven smoothly. Furthermore, the lead wire 22a is pulled by the lead wire 22a in the vertical movement by providing a difference in height (increasing the internal connection portion 21a) between the lead-out portion of the voice coil 22 from the main body and the internal connection portion 21a. It further contributes to the improvement of acoustic characteristics as a speaker, such as an increase in output by improving the amplitude of the diaphragm 23 described later.
[0021]
In addition, since the lead wire 22a of the voice coil extending in a reverse letter shape from the voice coil 22 is soldered to the internal connection portion 21a, the lead wire 22a reciprocates in the minor axis direction. It is easy to ensure the weight balance in the minor axis direction of the voice coil 22 and is effective in suppressing abnormal vibration of the diaphragm 23.
[0022]
The diaphragm 23 has an upper end of the voice coil 22 wound in the rectangular shape bonded and bonded to the center, and a peripheral edge thereof is bonded and bonded to the casing 20 to cover the upper opening surface of the casing 20.
[0023]
Reference numeral 24 denotes a protector provided with a plurality of small holes 24a, which is attached to the casing 20 so as to cover the diaphragm 23 in a state in which a braking cloth 24b is adhered to the outer surface thereof. The protector 24 protects the diaphragm 23 from external force, and the braking cloth 24b suppresses an excessive amplitude at the time of resonance of the diaphragm 23.
[0024]
It is possible to delete the brake cloth 24b by drilling a plurality of minute holes by laser irradiation without providing the small holes 24a in the protector 24, and this laser irradiation drilling process is performed during the speaker assembly process. By providing, the change of the diaphragm 23 due to the difference in the acoustic characteristics of the speaker and the change of the braking cloth 24b due to the difference in the resonance frequency associated therewith can be handled only by changing the drilling conditions by laser irradiation in the assembly process, thereby improving productivity. It is also possible to contribute to the reduction of the number of parts.
[0025]
A rectangular magnetic circuit unit 25 is formed by integrally bonding a rectangular magnet 25b and a rectangular upper plate 25c by adhesive bonding on a yoke 25a formed by bending a plate-shaped magnetic material. A magnetic gap 25e into which the voice coil 22 fits is provided between a wall portion 25d formed by bending the yoke 25a.
[0026]
As described above, the magnetic circuit unit 25 is press-fitted and held in the opening on the lower surface of the housing 20 so that a part of the voice coil 22 attached to the housing 20 by the diaphragm 23 is fitted into the magnetic gap 25e. Then, it is fixed by applying an adhesive.
[0027]
At this time, since the wall portion 25d of the yoke 25a is formed by bending, each corner portion 25f has a gap, and the magnetic gap 25e is opened outward by the corner portion 25f. The lead wire 22a extended from the corner portion of the coil 22 is drawn out of the magnetic circuit portion 25 so as to overlap with the corner portion 25f of the magnetic gap 25e as viewed from above.
[0028]
That is, when the lead wire 22a extends from the vicinity of the lower end portion of the voice coil 22, it extends from the magnetic gap 25e through the corner portion 25f to the outside of the magnetic circuit portion 25, and the lead wire 22a is near the upper end of the voice coil 22. When the voice coil 22 is moved up and down or at the maximum amplitude when the speaker is driven, the lead-out portion of the lead-out wire 22a from the main body of the voice coil 22 is positioned even in the magnetic gap 25e. Since the wire 22a does not collide with the magnetic circuit portion 25, there is no abnormal noise called a so-called magnetic gap defect.
[0029]
In addition, since the lead-out position of the lead-out line 22a does not take into consideration the collision with the magnetic circuit unit 25, it can contribute to the reduction in the thickness of the speaker.
[0030]
The yoke 25a is described as having four surfaces formed by bending the wall portion 25d. However, although the magnetic efficiency is slightly reduced, the wall portion on the short diameter side is not formed, so that the housing of the magnetic circuit portion 25 is formed. Positioning at the time of press-fitting into 20 becomes easy, and the number of assembling steps at the time of speaker assembly can be improved.
[0031]
In the above embodiment, the description has been made on the assumption that the voice coil 22 is wound in a rectangular shape. However, the casing 20 has openings on the upper and lower surfaces, and the magnetic circuit unit 25 also includes the diaphragm 23 and the voice coil. The lower mold convex portion (not shown) is formed by projecting the voice coil 22 from the lower opening surface of the casing 20 into the casing 20 because it is press-fitted after the mounting of the casing 22 to the casing 20. Is formed in a rectangular shape with the heat coil layer on the surface of the voice coil 22 heated and solidified so that the voice coil 22 is in the housing 20 or slightly protruded, and then bonded to the diaphragm 23. It is also possible to avoid the deformation due to the handling during the conveyance of the voice coil 22 and the complexity of the handling by preparing the voice coil 22 as a work-in-progress in advance.
[0032]
【The invention's effect】
As described above, the speaker of the present invention can be configured to provide a narrow rectangular speaker that effectively uses space in a mobile phone or the like.
[Brief description of the drawings]
FIG. 1A is an exploded perspective view of a receiver according to an embodiment of a speaker of the present invention. FIG. 1B is a perspective view in a state in which the casing that is the main part is turned over. FIG. Top view for explaining the relationship of the voice coil [FIG. 3] FIG. 4 is an exploded perspective view of the magnetic circuit part which is the same main part [FIG. 4] FIG.
20 Housing 21 Terminal 21a Internal connection part 21b External connection part 22 Voice coil 22b Bending part 23 Diaphragm 25 Magnetic circuit part 25e Magnetic gap 25f Corner part

Claims

An opening is provided on the upper and lower sides of the substantially rectangular body, one end is exposed at the short diameter part at both ends to become an internal connection part, and a housing with an insert molded terminal having the other end as an external connection part, A voice coil wound in a rectangular shape and having both ends electrically connected to the internal connection portion, a diaphragm attached to the upper end surface of the voice coil and mounted on the upper opening surface, and the lower portion The speaker is composed of a substantially rectangular magnetic circuit portion mounted on an opening surface and provided with a magnetic gap into which the voice coil is fitted, wherein the exposed portion is located at a substantially corner portion having a short diameter, and at least the exposed portion The lead wire of the voice coil that is electrically connected to the portion is drawn outward from the vicinity of the substantially corner portion of the voice coil main body, and the opposite side of the same short diameter is bent to the exposed portion side, Roughly reversed Speaker those which extends bent in shape.

Extending out a speaker according to claim 1 Symbol placement between the electrical connection points are provided height difference between the voice coil body and the exposed portion of the lead wire.

Speaker according to claim 1 or claim 2 Ru magnetic circuit der corners of the magnetic gap is opened toward at least outwardly.

3. The magnetic circuit part according to claim 1 or 2, wherein the magnetic gap is a magnetic circuit portion that is open at least on the short diameter side and the lead wire is drawn outward from the short diameter side of the voice coil body. Speaker.