JP3431459B2 - Speaker structure - Google Patents
Speaker structureInfo
- Publication number
- JP3431459B2 JP3431459B2 JP19930297A JP19930297A JP3431459B2 JP 3431459 B2 JP3431459 B2 JP 3431459B2 JP 19930297 A JP19930297 A JP 19930297A JP 19930297 A JP19930297 A JP 19930297A JP 3431459 B2 JP3431459 B2 JP 3431459B2
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- damper
- speaker
- inner diameter
- flat
- 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
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、２個のマグネット
を同極同士が対向するように配置すると共に両マグネッ
ト間に介在せしめた磁性材からなるセンタープレートの
外周に反発磁束による磁界が形成されるようにし、該磁
界内にボイスコイルを配置してなる反発磁気回路型スピ
ーカの構造に係り、特に振動板及びダンパの内径部をボ
イスコイルに直接接合したスピーカの構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention arranges two magnets so that the same poles face each other, and a magnetic field due to repulsive magnetic flux is formed on the outer periphery of a center plate made of a magnetic material interposed between the two magnets. Thus, the present invention relates to the structure of a repulsive magnetic circuit type speaker in which a voice coil is arranged in the magnetic field, and particularly to the structure of a speaker in which the diaphragm and the inner diameter of the damper are directly bonded to the voice coil.
【０００２】[0002]
【従来の技術】従来より、図１０に示すように、リング
状をなした２個のマグネットＭ１，Ｍ２を同極同士が対
向するように配置して両マグネット間に介在せしめた磁
性材からなるセンタープレートＰの外周に反発磁束によ
る磁界が形成されるようにし（一般に反発磁気回路と称
されている）、該磁界内にボイスコイル１を配置してな
る反発磁気回路型スピーカがある。2. Description of the Related Art Conventionally, as shown in FIG. 10, two ring-shaped magnets M1 and M2 are arranged so that the same poles face each other and are made of a magnetic material interposed between the two magnets. There is a repulsive magnetic circuit type speaker in which a magnetic field due to the repulsive magnetic flux is formed on the outer periphery of the center plate P (generally called a repulsive magnetic circuit), and the voice coil 1 is arranged in the magnetic field.
【０００３】我々もこの種の反発磁気回路型スピーカを
各種提案し、また、スピーカの薄型化及び軽量化をより
可能にするために、振動板Ｄ及びダンパ２の内径部をボ
イスコイル１に直接接合した振動板直結型スピーカも先
に提案した。We have also proposed various repulsive magnetic circuit type speakers of this kind, and in order to make the speaker thinner and lighter, the diaphragm D and the inner diameter of the damper 2 are directly attached to the voice coil 1. We also proposed a speaker directly connected to a diaphragm.
【０００４】この図１０に示す振動板直結型スピーカの
構造上の特徴は、図９に示す一般的な磁気ギャップＧを
有するスピーカではボイスコイルボビン１２を介して振
動板Ｄを駆動するのに対し、ボイスコイルボビンを介さ
ないで、或いはボイスコイルボビンを介したとしても、
ボイスコイル１に極めて近い位置に振動板Ｄのネック部
を配置することが可能であることから、ボイスコイル１
から振動板Ｄへの伝搬効率が図９に示すスピーカよりも
遥かに効率的で、しかも磁気ギャップＧがない構造であ
ることから、薄型化、軽量化に適した構造である。The structural feature of the speaker directly coupled with the diaphragm shown in FIG. 10 is that the speaker having the general magnetic gap G shown in FIG. 9 drives the diaphragm D via the voice coil bobbin 12. Even without a voice coil bobbin or even with a voice coil bobbin,
Since the neck portion of the diaphragm D can be arranged at a position extremely close to the voice coil 1, the voice coil 1
9 is much more efficient than the speaker shown in FIG. 9 in the propagation efficiency from the diaphragm to the diaphragm D, and has a structure without the magnetic gap G. Therefore, the structure is suitable for thinning and weight reduction.
【０００５】また、図９に示す一般的なスピーカ用の磁
気回路は、軟鉄等の磁性材からなるトッププレートＰ及
びヨークＹ等によりマグネットＭの磁気を磁気ギャップ
Ｇに集める閉回路構成であるため、磁気ギャップＧ内に
発生した磁束の向きは１方向である。Further, the magnetic circuit for the general speaker shown in FIG. 9 has a closed circuit structure in which the magnetism of the magnet M is collected in the magnetic gap G by the top plate P made of a magnetic material such as soft iron and the yoke Y. The direction of the magnetic flux generated in the magnetic gap G is one direction.
【０００６】これに対し、図１０に示す振動板直結型ス
ピーカ用の磁気回路（反発磁気回路）は基本的にオープ
ン回路であるため、図１１で示すように、マグネットＭ
１、Ｍ２のＮ極より発生した殆どの磁気はセンタープレ
ートＰ中を図で示すところの左右に向かって流れ、セン
タープレートＰを通過後更に上下方向、即ち、各々のマ
グネットＭ１、Ｍ２の頂部にあるＳ極に向かって流れる
ため、磁束の向きはプレート近傍と逆の左側となって図
１１のようにセンタープレートＰを中心に上下方向で対
称な磁束分布を形成するものである。On the other hand, since the magnetic circuit (repulsive magnetic circuit) for the diaphragm directly coupled type speaker shown in FIG. 10 is basically an open circuit, as shown in FIG.
Most of the magnetism generated from the N poles of M1 and M2 flows in the center plate P to the left and right as shown in the figure, and after passing through the center plate P, further to the vertical direction, that is, to the top of each magnet M1 and M2. Since it flows toward a certain S pole, the direction of the magnetic flux is on the left side, which is opposite to the vicinity of the plate, and forms a symmetrical magnetic flux distribution in the up-down direction about the center plate P as shown in FIG.
【０００７】図９に示す一般的な磁気ギャップＧを有す
るスピーカの場合は、該磁気ギャップＧの中にボイスコ
イル１を配置する形式であるから、ボイスコイル１を駆
動する磁束の向きが常に一定であるが、図１０に示す反
発磁気回路型スピーカ、特に振動板直結型スピーカの場
合は、磁気回路がオープン回路でしかも磁気ギャップを
形成しない構造であるため、磁気回路周辺、即ち、ボイ
スコイル１が振幅する方向に二つの磁界が発生し、セン
タープレートＰの外周部近傍にボイスコイル１を駆動す
る磁束がプラス側に向いたプラス磁界が発生すると共
に、磁束がマイナス側に向いたマイナス磁界がマグネッ
トＭ１、Ｍ２の厚さ方向の中間点近傍から発生する。In the case of the speaker having the general magnetic gap G shown in FIG. 9, since the voice coil 1 is arranged in the magnetic gap G, the direction of the magnetic flux for driving the voice coil 1 is always constant. However, in the case of the repulsive magnetic circuit type speaker shown in FIG. 10, particularly in the case of the diaphragm direct connection type speaker, since the magnetic circuit is an open circuit and does not form a magnetic gap, the magnetic circuit periphery, that is, the voice coil 1 Generate two positive magnetic fields in the vicinity of the outer periphery of the center plate P, and a positive magnetic field in which the magnetic flux driving the voice coil 1 is directed to the positive side, and a negative magnetic field in which the magnetic flux is directed to the negative side. It is generated near the midpoint of the magnets M1 and M2 in the thickness direction.
【０００８】従って、反発磁気回路型スピーカの場合に
は、前記マイナス磁界の存在を考慮に入れる必要があ
り、我々はボイスコイル１が不必要にマイナス磁界の影
響を受けないようにマグネットＭ１、Ｍ２の寸法及びボ
イスコイル１の巻巾寸法等を最適化して、実用に充分耐
え得るスピーカをすでに提案している。Therefore, in the case of a repulsive magnetic circuit type speaker, it is necessary to take the existence of the negative magnetic field into consideration, and we have magnets M1 and M2 so that the voice coil 1 is not unnecessarily affected by the negative magnetic field. And a winding width of the voice coil 1 have been optimized, and a speaker that can withstand practical use has already been proposed.
【０００９】このような振動板直結型スピーカはボイス
コイル１の振幅範囲内にマイナス磁界を有し易いスピー
カ構造であるから、振動系が中振幅或いは小振幅で済む
スピーカ、例えば、中高音用等のスピーカに適した磁気
回路構造であって、振動系が大振幅するスピーカ、例え
ば、低音用、特に小口径の低音用スピーカ等にはあまり
適さない磁気回路構造とされている。Since such a diaphragm direct-coupling type speaker has a speaker structure which tends to have a negative magnetic field within the amplitude range of the voice coil 1, a speaker in which the vibration system has a medium amplitude or a small amplitude, for example, for middle and high tones. The magnetic circuit structure is suitable for the speaker of (1), and is not so suitable for a speaker in which the vibration system has a large amplitude, for example, a speaker for bass, particularly a speaker for bass with a small diameter.
【００１０】しかし、振動板直結型スピーカの利点、即
ち、軽量化、薄型化等が可能な利点を活かし、限られた
条件内、つまり限られたプラス磁界内にて可能な限り振
動系を振幅せしめ、低音域の再生範囲をより一層広げる
方法が望まれる。このための有効な手段として、効率を
損なわない範囲内でボイスコイル１の巻巾寸法を極力小
さくし、ボイスコイル１の振幅時にマイナス磁界に及ぶ
ことを可能な限り避ける方法が考えられる。However, taking advantage of the advantage of the speaker directly connected to the diaphragm, that is, the advantage that the speaker can be made lighter and thinner, the vibration system can be vibrated as much as possible under a limited condition, that is, a limited positive magnetic field. At the very least, a method of further expanding the reproduction range in the low frequency range is desired. As an effective means for this, a method is conceivable in which the winding width of the voice coil 1 is made as small as possible within a range that does not impair the efficiency, and the negative magnetic field is prevented from reaching the amplitude of the voice coil 1 as much as possible.
【００１１】[0011]
【発明が解決しようとする課題】ところが、ボイスコイ
ル１の巻巾寸法を小さくすると、ボイスコイル１の外周
部１Ｌの上下方向の寸法が小さくなる結果、ボイスコイ
ル１の外周部１Ｌにおける振動板Ｄのネック部との接着
部分の寸法比率が大きくなり、ダンパ２の内径部２１を
ボイスコイル１に接合するにはボイスコイル１の外周部
１Ｌの下端部１ｂ近傍にしか接合できないこととなり、
ダンパ内径部２１のボイスコイル外周部１Ｌへの確実な
接合が事実上困難となる。However, when the winding width dimension of the voice coil 1 is reduced, the vertical dimension of the outer peripheral portion 1L of the voice coil 1 is reduced. As a result, the diaphragm D on the outer peripheral portion 1L of the voice coil 1 is reduced. The dimensional ratio of the bonded portion with the neck portion of the voice coil becomes large, and in order to join the inner diameter portion 21 of the damper 2 to the voice coil 1, it can be joined only near the lower end portion 1b of the outer peripheral portion 1L of the voice coil 1.
It is practically difficult to reliably join the damper inner diameter portion 21 to the voice coil outer peripheral portion 1L.
【００１２】ボイスコイル１の外周部１Ｌにダンパ２を
装着する場合、ダンパ内径部をボイスコイル外周部１Ｌ
に挿入した後、ダンパ内径部とボイスコイル外周部１Ｌ
との接触部（全周）に接着剤ｈを塗布し、該接触部を接
着してボイスコイル１とダンパ２を装着する方法が最も
一般的な方法であるが、ダンパ内径部がボイスコイル外
周部１Ｌの下端部１ｂ近傍に設定すると、ダンパ２の装
着作業においてダンパ内径部がボイスコイル外周部１Ｌ
から脱落しやすくなり、装着時の作業性が悪くなるばか
りでなく、従来のように、ダンパ内径部をボイスコイル
外周部１Ｌの適切な位置に配置したものと比較して接着
面積が約５０％程度と少なくなる欠点を有する。When the damper 2 is mounted on the outer peripheral portion 1L of the voice coil 1, the damper inner diameter portion is set to the voice coil outer peripheral portion 1L.
Inside the damper, and the outer circumference of the voice coil 1L
The most general method is to apply the adhesive h to the contact portion (entire circumference) with and to attach the voice coil 1 and the damper 2 by bonding the contact portion, but the inner diameter portion of the damper is the outer circumference of the voice coil. If it is set in the vicinity of the lower end 1b of the portion 1L, the damper inner diameter portion becomes the voice coil outer peripheral portion 1L in the mounting work of the damper 2.
Not only does it become easier to fall off, the workability at the time of mounting deteriorates, but the adhesive area is about 50% compared to the conventional one in which the damper inner diameter portion is arranged at an appropriate position on the voice coil outer peripheral portion 1L. It has the drawback of becoming less and less.
【００１３】これを詳説すると、ダンパ内径部をボイス
コイル外周部１Ｌの適切な位置に配置して接着剤を塗布
した場合、接着剤ｈの塗布状態はダンパ内径部の片面
（上面）とボイスコイル外周部１Ｌを覆った状態とな
り、しかも接着剤ｈがダンパ内径部及びボイスコイル外
周部１Ｌの接触部における隙間、並びにダンパ２の基材
である織布の織り目から染み出し、該染み出した接着剤
ｈがダンパ内径部の裏面側及びボイスコイル外周部１Ｌ
を接着し、該接着剤ｈが硬化すると図１０に示すような
断面形状となり、ダンパ内径部はダンパ２の基材の表面
及び裏面を確実にボイスコイル外周部１Ｌに接着せしめ
ることができる。More specifically, when the damper inner diameter portion is arranged at an appropriate position on the voice coil outer peripheral portion 1L and the adhesive is applied, the adhesive h is applied to one side (upper surface) of the damper inner diameter portion and the voice coil. The outer peripheral portion 1L is covered, and the adhesive h oozes out from the gap between the damper inner diameter portion and the contact portion of the voice coil outer peripheral portion 1L, and from the texture of the woven fabric as the base material of the damper 2, and the bleeding adhesion Agent h is on the back side of the inner diameter of the damper and the outer peripheral portion 1L of the voice coil.
When the adhesive h is hardened and the adhesive h is hardened, it has a cross-sectional shape as shown in FIG. 10, and the damper inner diameter portion can surely bond the front and back surfaces of the base material of the damper 2 to the voice coil outer peripheral portion 1L.
【００１４】一方、ダンパ内径部をボイスコイル下端部
１ｂ或いは下端部１ｂ近傍に配置した場合における接着
剤の塗布状態は、ダンパ内径部の上面側は図１０と同様
にダンパ内径部の片面（上面）及びボイスコイル外周部
１Ｌを覆った状態となるが、ダンパ内径部の隙間、並び
にダンパ２の基材である織布の織り目等から裏面側に染
み出した接着剤は垂れ下がって硬化後には図１２で示す
ような断面形状となり、主としてダンパ内径部の片面
（上面）とボイスコイル外周部１Ｌを接着した構造とな
り、ダンパ内径部を適切に配置したものと比較して、接
着剤ｈと非接着物であるボイスコイル外周部１Ｌ及びダ
ンパ内径部との接着面積が少ない構造となる。On the other hand, when the damper inner diameter portion is arranged at the voice coil lower end portion 1b or in the vicinity of the lower end portion 1b, the adhesive is applied to the upper surface side of the damper inner diameter portion on one side (upper surface) as in FIG. ) And the voice coil outer peripheral portion 1L are covered, but the adhesive that oozes out to the back side from the gap of the damper inner diameter portion and the texture of the woven fabric that is the base material of the damper 2 hangs down, and after curing The cross-sectional shape is as shown by 12, and the structure is such that one side (upper surface) of the damper inner diameter portion and the voice coil outer peripheral portion 1L are mainly adhered to each other. This structure has a small adhesion area between the outer peripheral portion 1L of the voice coil and the inner diameter portion of the damper.
【００１５】接着面積が少ないと、大入力時（振動系の
大振幅時）において、接着されたダンパ内径部が該接着
部（ボイスコイル外周部１Ｌ）より剥離する、いわゆる
ダンパ剥れの事象が多発し、スピーカの性能に重大な欠
点を与える。If the adhesion area is small, there is a phenomenon of so-called damper peeling, in which the bonded damper inner diameter part is separated from the bonded part (voice coil outer peripheral part 1L) at the time of a large input (when the vibration system has a large amplitude). Frequent occurrence, giving a serious drawback to the performance of the speaker.
【００１６】そこで、本発明の目的は、反発磁気回路型
の振動板直結型スピーカにおいて、より軽量化、薄型化
のためにボイスコイル下端部或いは下端部近傍にダンパ
内径部を配置しても充分に接着強度を確保でき、振動系
の大振幅時においてもダンパ剥がれが生じないスピーカ
を提供することにある。Therefore, an object of the present invention is to provide a repulsion magnetic circuit type diaphragm direct connection type loudspeaker with a damper inner diameter portion arranged at the lower end portion of the voice coil or in the vicinity of the lower end portion in order to further reduce the weight and thickness. Another object of the present invention is to provide a speaker in which the adhesive strength can be secured and the damper does not peel off even when the vibration system has a large amplitude.
【００１７】[0017]
【課題を解決するための手段】本発明のスピーカ構造
は、請求項１記載のものにおいては、２個のマグネット
を同極同士が対向するように配置して両マグネット間に
介在せしめた磁性材からなるセンタープレートの外周に
反発磁束による磁界が形成されるようにし、該磁界内に
ボイスコイルを配置してなる反発磁気回路型スピーカに
おいて、ボイスコイルを支持するダンパの内径部には、
ボイスコイルの下端縁に固定するための平坦部が設けら
れていて、該平坦部とボイスコイルの下端縁とが接着固
定されていることを特徴とする。The speaker structure according to the present invention is the magnetic material according to claim 1, wherein two magnets are arranged such that the same poles face each other and are interposed between the two magnets. as the magnetic field due to the repulsive magnetic flux on the outer periphery of the center plate is formed consisting, in repulsion magnetic circuit type loudspeaker formed by arranging the voice coil to the magnetic field within the bore of the damper supporting a voice coil,
It is characterized in that a flat portion for fixing to the lower end edge of the voice coil is provided , and the flat portion and the lower end edge of the voice coil are adhesively fixed.
【００１８】これにより、ダンパ内径部をボイスコイル
下端部或いは下端部近傍に配置しても充分に接着強度が
確保され、振動系の大振幅時においてもダンパ剥がれが
生じないから、スピーカをより軽量化、薄型化すること
ができる。As a result, even if the inner diameter of the damper is arranged at the lower end of the voice coil or in the vicinity of the lower end, sufficient adhesive strength is ensured, and the damper does not peel off even when the vibration system has a large amplitude. Can be made thinner and thinner.
【００１９】請求項２記載のものにおいては、平坦部と
ダンパの最内周側の波形のコルゲーションとの間に、ボ
イスコイルの下部外周に当接する垂直部が設けられてい
て、該垂直部とボイスコイルの外周部及び平坦部とボイ
スコイルの下端縁とがそれぞれ接着固定されていること
を特徴とする。[0019] In those described in claim 2 is in between the corrugations of the innermost of the waveform of the flat part and the damper, the vertical portion abuts is provided on the lower periphery of the voice coil Tei
The vertical portion and the outer peripheral portion of the voice coil and the flat portion and the lower end edge of the voice coil are bonded and fixed, respectively.
【００２０】これにより、ダンパ内径部をボイスコイル
下端部或いは下端部近傍に配置して接着する際により接
着強度を高めることができる。With this, the adhesive strength can be increased by disposing the damper inner diameter portion at the lower end portion of the voice coil or in the vicinity of the lower end portion for adhesion.
【００２１】請求項３記載のものにおいては、ボイスコ
イルがボビンレス構造であることを特徴とする。According to a third aspect of the present invention, the voice coil has a bobbinless structure.
【００２２】前記のようなダンパ内径部とボイスコイル
の下端部との接着強度の確保及び向上の効果は、ボイス
コイルがボビンレスである場合に特に発揮できる。The effect of securing and improving the adhesive strength between the inner diameter portion of the damper and the lower end portion of the voice coil as described above can be exerted particularly when the voice coil is bobbinless.
【００２３】請求項４記載のものにおいては、ダンパが
平編錦糸線を装着して導電部を設けた導電ダンパである
ことを特徴とする。According to a fourth aspect of the present invention, the damper is a conductive damper provided with a flat knitted tinsel wire and provided with a conductive portion.
【００２４】平編錦糸線をダンパに縫着してボイスコイ
ルへの信号入力用の導電部とした導電ダンパは我々が先
に提案すると共にこれを実施して、薄型化、配線構造の
簡略化等において優れた効果を発揮しているが、請求項
４記載のものにおいてはこのような導電ダンパの内径部
をボイスコイルの下端部に接着固定する構造においても
極めて有利である。We have previously proposed a conductive damper which is used as a conductive portion for inputting a signal to a voice coil by sewing a flat knitted tinsel wire to the damper, and by implementing this, it is made thinner and the wiring structure is simplified. However, in the structure according to the fourth aspect, the structure in which the inner diameter portion of such a conductive damper is fixedly bonded to the lower end portion of the voice coil is extremely advantageous.
【００２５】[0025]
【発明の実施の形態】本発明に係るスピーカの構造の実
施例を図１〜図８に基づいて説明するが、図１０〜図１
２に基づいて説明した従来のものと同一の構成部分につ
いては同一符号を付してその詳細な説明は省略する。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the structure of a speaker according to the present invention will be described with reference to FIGS.
The same components as those of the conventional one described on the basis of No. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００２６】反発磁気回路は、図６に示すように、リン
グ状の２つのマグネットＭ１，Ｍ２を同極同士が対向す
るように配置して両マグネット間に磁性材からなるリン
グ状のセンタープレートＰを挟持し、非磁性材からなる
ホルダーＨＬで保持して構成される。In the repulsive magnetic circuit, as shown in FIG. 6, two ring-shaped magnets M1 and M2 are arranged so that the same poles face each other, and a ring-shaped center plate P made of a magnetic material is provided between the two magnets. And is held by a holder HL made of a non-magnetic material.
【００２７】前記のようにして構成された反発磁気回路
のセンタープレートＰの外周には反発磁束による磁界が
形成されるから、該磁界内にボイスコイル１を配置する
と共に該ボイスコイル１に振動板Ｄの内径部及びダンパ
２の内径部を接合して反発磁気回路型で且つ振動板直結
型のスピーカが構成される。Since the magnetic field due to the repulsive magnetic flux is formed on the outer periphery of the center plate P of the repulsive magnetic circuit constructed as described above, the voice coil 1 is arranged in the magnetic field and the diaphragm is attached to the voice coil 1. The inner diameter portion of D and the inner diameter portion of the damper 2 are joined to form a repulsive magnetic circuit type speaker directly connected to the diaphragm.
【００２８】図７及び図８に示すように、ダンパ２は波
形のコルゲーション２ｃを有するものであり、該ダンパ
２の内径部２１にはボイスコイル１の下端縁１ｂに固定
するための平坦部２１ｂを設けて該平坦部２１ｂとボイ
スコイル１の下端縁１ｂとを接着剤ｈで接着固定する。
図７に示すものにおいては、前記平坦部２１ｂとダンパ
２の最内周のコルゲーション２ｃとの間にボイスコイル
１の下部外周に当接する垂直部２１Ｌが設けられ、該垂
直部２１Ｌとボイスコイル１の下部外周も接着剤ｈで接
着固定される。As shown in FIGS. 7 and 8, the damper 2 has a corrugated corrugation 2c, and the inner diameter portion 21 of the damper 2 has a flat portion 21b for fixing to the lower end edge 1b of the voice coil 1. Is provided and the flat portion 21b and the lower end edge 1b of the voice coil 1 are bonded and fixed with an adhesive h.
In the structure shown in FIG. 7, a vertical portion 21L that abuts the lower outer circumference of the voice coil 1 is provided between the flat portion 21b and the innermost corrugation 2c of the damper 2, and the vertical portion 21L and the voice coil 1 are provided. The outer periphery of the lower part of is also fixed by the adhesive h.
【００２９】[0029]
【実施例】反発磁気回路を構成するマグネットＭ１，Ｍ
２は、外径２９ｍｍ、内径１２ｍｍ、厚さ８ｍｍで、最
大エネルギー積３０ＭＧｅのネオジウムマグネットを使
用し、センタープレートＰは、一般的に使用されている
Ｓ１０Ｃと称されている鉄材をプレス加工及び切削加工
して、外径３０ｍｍ、内径１１．７８ｍｍ、厚さ５ｍｍ
のものを得、更にクロメート処理と称されている亜鉛メ
ッキを施した。[Example] Magnets M1 and M constituting a repulsive magnetic circuit
2 is an outer diameter of 29 mm, an inner diameter of 12 mm, a thickness of 8 mm, and uses a neodymium magnet with a maximum energy product of 30 MGe, and the center plate P is formed by pressing and cutting a commonly used iron material called S10C. Processed, outer diameter 30 mm, inner diameter 11.78 mm, thickness 5 mm
Then, it was subjected to galvanization called chromate treatment.
【００３０】ボイスコイル１は、線材の直径が０．３５
ｍｍの銅クラッドアルミ線と称されているものに、絶縁
材としてポリエステルをコートし、更に接着層として、
通称ＳＶワニスと称されている耐熱ワニスをコートし、
最大直径が０．３９５ｍｍのコイル線材を、内径３０．
４ｍｍ、巻巾約８．７ｍｍ、総巻き数１３３ターン、１
層目２２ターン、巻き層数６、仕上がり外径約３５．２
ｍｍ、直流抵抗３．４Ωのボビンレス構造のボイスコイ
ルを作製した。また、コイル外周部には絶縁層として厚
さ約８μのポリイミドフィルムを貼り付け、該ポリイミ
ドフィルムの表面には、図１に示すように、厚さ約８
μ、長辺が約１０ｍｍ、短辺が約８ｍｍの短冊状の銅箔
をピッチ約２１ｍｍで２カ所に貼り付け、更に各々の銅
箔にコイル線の端部を半田付けして接続配線し、該銅箔
を入力用電極１１とした。The voice coil 1 has a wire diameter of 0.35.
mm copper clad aluminum wire is coated with polyester as an insulating material, and as an adhesive layer,
Coat a heat resistant varnish commonly called SV varnish,
Coil wire with a maximum diameter of 0.395 mm, inner diameter 30.
4mm, winding width about 8.7mm, total number of windings 133 turns, 1
Layer 22 turns, number of winding layers 6, finished outer diameter about 35.2
A voice coil having a bobbin-less structure with a mm size and a DC resistance of 3.4Ω was manufactured. Further, a polyimide film having a thickness of about 8 μ is attached as an insulating layer on the outer peripheral portion of the coil, and a thickness of about 8 μm is applied to the surface of the polyimide film as shown in FIG.
μ, the long side is about 10 mm, the short side is about 8 mm, and the strip-shaped copper foil is attached at two places at a pitch of about 21 mm, and the end of the coil wire is soldered to each copper foil to connect and connect. The copper foil was used as the input electrode 11.
【００３１】ダンパ２は、従来の一般のダンパと同様
に、コーネックスと呼ばれる織布を、フェノール樹脂原
液をメタノールで希釈して比重０．９２５に設定したフ
ェノール樹脂溶液にデッピングしてフェノール樹脂を含
浸させ、メタノール溶剤を揮発させて樹脂タック性を除
いた後、所定の幅に切断してダンパ成型用の基布を作製
した。Like the conventional dampers, the damper 2 is prepared by dipping a woven cloth called Conex into a phenol resin solution having a specific gravity of 0.925 by diluting a phenol resin stock solution with methanol. After impregnation, the methanol solvent was volatilized to remove the resin tackiness, and the resin cloth was cut into a predetermined width to prepare a base fabric for molding a damper.
【００３２】この基布に平編錦糸線３を該基布の中心線
に対して２本平行で且つピッチ寸法を２１．２ｍｍで縫
い付ける。平編錦糸線３は、２００デニールのパラ系ア
ラミド繊維を中心糸とし、該中心糸に幅０．３２ｍｍ、
厚さ０．０２７ｍｍの錫合金銅箔を２２回／ｃｍで１層
に巻き付けてなる錦糸線を１３本集め、編組ピッチ約２
７．４５ｍｍ／回で仕上がり幅約３ｍｍの平網状に編ん
で構成される。この平編錦糸線３を縫着した織布を従来
と同様に織布の中心線を基準にして熱プレス成型加工し
て波形のコルゲーション２ｃを一体成型し、不要な部分
をトリミング加工で除去して、図２のように、平編錦糸
線３をコルゲーション２ｃに沿った状態で装着した導電
ダンパ２Ｗを得た。Two flat knitted tinsel threads 3 are sewn to this base cloth in parallel with the center line of the base cloth with a pitch dimension of 21.2 mm. The flat knitted tinsel wire 3 has 200 denier para-aramid fiber as the center yarn, and the center yarn has a width of 0.32 mm,
A total of 13 tinsel wires made by winding a 0.027 mm thick tin alloy copper foil in one layer at 22 turns / cm and a braid pitch of about 2
It is constructed by knitting in a flat net shape with a finished width of about 3 mm at 7.45 mm / turn. The woven cloth sewn with the flat knitted tinsel wire 3 is subjected to hot press molding with the center line of the woven cloth as a standard to integrally form the corrugation 2c having a corrugation, and unnecessary portions are removed by trimming processing. Then, as shown in FIG. 2, a conductive damper 2W was obtained in which the flat knitted tinsel wire 3 was mounted along the corrugations 2c.
【００３３】導電ダンパ２Ｗの断面形状は、コイル装着
用の穴、即ちダンパ内径部２１の直径が３０．８ｍｍで
あり、該内径部２１から外周方向に向かって幅約２．２
ｍｍの平坦部２１ｂが設けられる。この平坦部２１ｂの
端部から半径０．９ｍｍの曲率で上方に向かって高さ約
０．９ｍｍの垂直部２１Ｌが設けられ、該垂直部２１Ｌ
の端部から前記波形のコルゲーション２ｃが設けられて
いる。従って、前記平端部２１ｂと最内周のコルゲーシ
ョン２ｃとの間に垂直部２１Ｌが形成されることにな
る。The sectional shape of the conductive damper 2W is such that the diameter of the coil mounting hole, that is, the damper inner diameter portion 21 is 30.8 mm, and the width from the inner diameter portion 21 toward the outer peripheral direction is approximately 2.2.
A flat portion 21b of mm is provided. A vertical portion 21L having a radius of 0.9 mm and a height of about 0.9 mm is provided upward from the end of the flat portion 21b.
The corrugation 2c having the corrugated shape is provided from the end of the. Therefore, the vertical portion 21L is formed between the flat end portion 21b and the innermost corrugation 2c.
【００３４】コルゲーション２ｃの頂部から底部までの
深さは１．８ｍｍ、ピッチは約３ｍｍであり、９個のコ
ルゲーションを有し、該コルゲーション２ｃの最大外周
部の径は約９１ｍｍで該外周部から外側に幅約３ｍｍの
平坦な貼り代部が形成され、更に該貼り代部の外側に斜
めの立上がり部及び該立上がり部から水平方向に延出す
る２カ所の舌辺部が設けられ、該舌辺部に前記平編錦糸
線３が及んでいる。The depth from the top to the bottom of the corrugation 2c is 1.8 mm, the pitch is about 3 mm, and there are 9 corrugations. The maximum outer diameter of the corrugation 2c is about 91 mm from the outer circumference. A flat sticking margin having a width of about 3 mm is formed on the outside, and an oblique rising portion and two tongue portions extending horizontally from the rising portion are provided on the outside of the sticking margin. The flat knitted tinsel wire 3 extends over the sides.
【００３５】前記のようにして構成された導電ダンパ２
Ｗは樹脂製の端子リングＲに取り付けられる。この端子
リングＲは、内径約９１ｍｍ、外径９８ｍｍ、厚さ約４
ｍｍのリング形状をなし、外周に高さ約２．５ｍｍ、幅
約２ｍｍの立上がり部が設けられ、該立上がり部から水
平方向に延出する舌辺部を一体成型した構成であって、
前記内径部から幅約４ｍｍの平坦部が設けられていて前
記導電ダンパ２Ｗの貼り代部を接着剤ｈで貼着するよう
になっている。Conductive damper 2 constructed as described above
W is attached to the terminal ring R made of resin. This terminal ring R has an inner diameter of about 91 mm, an outer diameter of 98 mm, and a thickness of about 4 mm.
and a tongue portion extending in the horizontal direction from the rising portion, which is formed integrally with a rising portion having a height of about 2.5 mm and a width of about 2 mm.
A flat portion having a width of about 4 mm from the inner diameter portion is provided so that the adhesive margin portion of the conductive damper 2W can be adhered with the adhesive h.
【００３６】導電ダンパ２Ｗの貼り代部の貼着に際して
は、導電ダンパ２Ｗの舌辺部を端子リングＲの舌辺部に
配置して接着する。これにより導電ダンパの舌辺部に及
んでいる平編錦糸線３の端部が端子リングＲの舌辺部の
所定位置に位置するから、入力用端子ラグ３ａをカシメ
止めする。At the time of sticking the sticking margin of the conductive damper 2W, the tongue of the conductive damper 2W is placed on the tongue of the terminal ring R and bonded. As a result, the end of the flat knitted tinsel wire 3 extending to the tongue of the conductive damper is located at a predetermined position on the tongue of the terminal ring R, so that the input terminal lug 3a is caulked.
【００３７】ボイスコイル１を前記のようにして端子が
設けられたダンパ２の内径部２１に装着する。装着に際
しては、図示しないが組立治具を用い、該治具のダンパ
装着部にダンパを設置し、ボイスコイル１の内径を治具
のコイル装着部に設置する。このとき、図４に示すよう
に、ボイスコイルの外周部１Ｌに設けた入力用電極１１
をダンパ２の内径部２１に及んだ平編錦糸線３の端部に
合わせて配置し、ダンパ２の平坦部２１ｂがボイスコイ
ル１の下端縁１ｂに接触し、垂直部２１Ｌに及んだ平編
錦糸線３と前記入力用電極１１も接触する。この接触部
を図５に示すように半田付けし、導通チェックをした
後、該半田付け部ｓを覆うように、しかもボイスコイル
１の外周部１Ｌに沿って接着剤ｈを紐状に均一に１周塗
布する。接着剤は通常一般的に使用されている２液混合
型のアクリル系接着剤であり、塗布量は約０．３５ｇで
ある。The voice coil 1 is attached to the inner diameter portion 21 of the damper 2 provided with the terminals as described above. At the time of mounting, although not shown, an assembly jig is used, the damper is installed in the damper mounting part of the jig, and the inner diameter of the voice coil 1 is installed in the coil mounting part of the jig. At this time, as shown in FIG. 4, the input electrode 11 provided on the outer peripheral portion 1L of the voice coil.
Is arranged in conformity with the end of the flat knitted tinsel wire 3 extending over the inner diameter portion 21 of the damper 2, and the flat portion 21b of the damper 2 contacts the lower end edge 1b of the voice coil 1 and extends over the vertical portion 21L. The flat knitted tinsel wire 3 and the input electrode 11 are also in contact with each other. After this contact portion is soldered as shown in FIG. 5 and a continuity check is performed, the adhesive h is uniformly applied in a string shape so as to cover the soldered portion s and along the outer peripheral portion 1L of the voice coil 1. Apply one lap. The adhesive is a commonly used two-liquid mixed type acrylic adhesive, and the coating amount is about 0.35 g.
【００３８】接着剤ｈの硬化（常温下においては概ね２
０分程）後、ダンパ２を組立治具から外し、図５に示す
ような端子付きのダンパ２を得る。これを図６に示すよ
うに、通常一般的に６×９インチと称されている楕円形
状の振動板Ｄを有する振動板直結型の反発磁気回路型ス
ピーカとして組み立てた。Curing of the adhesive h (2 at room temperature
After about 0 minutes), the damper 2 is removed from the assembly jig to obtain the damper 2 with terminals as shown in FIG. As shown in FIG. 6, this was assembled as a diaphragm direct-coupling type repulsive magnetic circuit type speaker having an elliptical diaphragm D which is generally called 6 × 9 inches.
【００３９】[0039]
【比較例】前記のようにして組み立てた反発磁気回路型
スピーカ（以下、「実施例スピーカ」という）を６組用
意し、これと比較するために、図１２に示す従来の反発
磁気回路型スピーカとほぼ同様の構成のスピーカ（以
下、「比較例スピーカ」という）を６組組み立てた。図
１２のものと異なる構成はボイスコイルボビン１２がな
いボビンレスボイスコイルを使用したことである。[Comparative Example] Six sets of repulsive magnetic circuit type loudspeakers (hereinafter referred to as "Example loudspeakers") assembled as described above were prepared, and in order to compare with this, the conventional repulsive magnetic circuit type loudspeaker shown in FIG. Six sets of speakers (hereinafter, referred to as “comparative example speakers”) having substantially the same structure as the above were assembled. A configuration different from that of FIG. 12 is that a bobbinless voice coil without the voice coil bobbin 12 is used.
【００４０】実施例スピーカ６組と比較例スピーカ６組
を使用して比較したところ、２０Ｗ入力時（１００時
間）には双方共に６台全て異常は認められなかった。次
に、４０Ｗ（１００時間）入力時において実施例スピー
カは６台全て異常は認められなかったが、比較例スピー
カは６台中１台にダンパ剥がれが認められ、更に５０Ｗ
入力時（１００時間）において実施例スピーカは６台全
て異常は認められなかったが、比較例スピーカは残り５
台中の２台にダンパ剥がれが認められた。When 6 sets of speaker of the example and 6 sets of speaker of the comparative example were used for comparison, no abnormality was found in all 6 sets at 20 W input (100 hours). Next, at the time of input of 40 W (100 hours), no abnormality was found in all of the six example speakers, but one of the six comparative example speakers was found to have the damper peeled, and further 50 W
At the time of input (100 hours), no abnormalities were found in all the six example speakers, but the remaining five comparative example speakers were found.
Damper peeling was observed in two of the units.
【００４１】また、６０Ｗ入力で数時間後の状況につい
て観察したところ、実施例スピーカは６台全て異常は認
められなかったが、比較例スピーカは残り３台中の１台
にダンパ剥がれが認められた。Observation of the situation after several hours with 60 W input revealed that no abnormalities were found in all 6 of the example speakers, but damper peeling was found in 1 of the remaining 3 speakers of the comparative example. .
【００４２】図７に示すものにおいては、ダンパ２の内
径部２１における平坦部２１ｂと最内周側のコルゲーシ
ョン２ｃとの間に垂直部２１Ｌを設けたが、ボイスコイ
ル１の巻き層数が４層以上のボイスコイルの場合は、図
８に示すように、平坦部２１ｂを設けただけでも十分に
接着面積を得ることが可能であり、これによっても従来
の一般的なボイスコイル外周部１Ｌとダンパ内径部との
接着構造よりも有効であることは明らかである。[0042] Oite to that shown in Figure 7, it is provided with the vertical portions 21L, wound layer number of the voice coil 1 between the corrugation 2c of the flat portion 21b and the innermost side of the inner diameter portion 21 of the damper 2 In the case of a voice coil having four or more layers, as shown in FIG. 8, it is possible to obtain a sufficient bonding area even by providing the flat portion 21b. It is clear that it is more effective than the bonding structure of 1 L and the inner diameter of the damper.
【００４３】[0043]
【発明の効果】本発明のスピーカの構造によれば、請求
項１記載のものにおいては、反発磁気回路型スピーカで
あって振動板直結型のものにおいて、ダンパ内径部をボ
イスコイル下端部或は下端部近傍に配置しても充分に接
着強度を得ることができ、振動系の大振幅時においても
ダンパ剥れは生じないから、スピーカをより軽量化、薄
型化することができる。According to the structure of the speaker of the present invention, according to the first aspect of the present invention, the repulsive magnetic circuit type speaker, which is directly connected to the diaphragm, has the damper inner diameter portion at the voice coil lower end portion or the lower end portion. Even if the speaker is arranged near the lower end, sufficient adhesive strength can be obtained, and the damper does not peel off even when the vibration system has a large amplitude, so that the speaker can be made lighter and thinner.
【００４４】請求項２記載のものにおいては、ダンパ内
径部をボイスコイル下端部或は下端部近傍に配置して接
着する際により接着強度を高めることができる。According to the second aspect of the present invention, the adhesive strength can be increased by disposing the damper inner diameter portion at the lower end portion of the voice coil or in the vicinity of the lower end portion and adhering.
【００４５】前記のようなダンパ内径部とボイスコイル
の下端部との接着強度の確保及び接着強度の向上の効果
は、ボイスコイルがボビンレスである場合に特に発揮で
きる。The effect of securing the adhesive strength between the damper inner diameter portion and the lower end portion of the voice coil and improving the adhesive strength as described above can be exerted particularly when the voice coil is bobbinless.
【００４６】請求項４記載のものにおいては、ダンパと
して導電ダンパを使用するスピーカにおいても極めて有
効である。According to the fourth aspect of the present invention, it is extremely effective for a speaker using a conductive damper as a damper.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明のスピーカの構造の実施例に使用される
ボイスコイルの斜視図。FIG. 1 is a perspective view of a voice coil used in an embodiment of a speaker structure of the present invention.
【図２】本発明のスピーカの構造の実施例に使用される
ダンパの斜視図。FIG. 2 is a perspective view of a damper used in an embodiment of the structure of the speaker of the present invention.
【図３】ボイスコイルとダンパと組立リングの組立て前
の状態を示す斜視図。FIG. 3 is a perspective view showing a state before assembling the voice coil, the damper, and the assembly ring.
【図４】組立リングに装着したダンパにボイスコイルを
装着する前の状態を示す斜視図。FIG. 4 is a perspective view showing a state before the voice coil is attached to the damper attached to the assembly ring.
【図５】ボイスコイルとダンパと組立リングの組立状態
を示す斜視図。FIG. 5 is a perspective view showing an assembled state of a voice coil, a damper, and an assembly ring.
【図６】本発明のスピーカの構造を示す半截断面図。FIG. 6 is a half cross-sectional view showing the structure of the speaker of the present invention.
【図７】本発明のスピーカの構造の要部を示す拡大断面
図。FIG. 7 is an enlarged cross-sectional view showing the main parts of the structure of the speaker of the present invention.
【図８】本発明のスピーカの構造の他の構成例を示す要
部の拡大断面図。FIG. 8 is an enlarged cross-sectional view of a main part showing another configuration example of the structure of the speaker of the present invention.
【図９】従来の一般的な外磁型磁気回路によるスピーカ
の磁気分布を示す局部断面図。FIG. 9 is a local cross-sectional view showing a magnetic distribution of a speaker using a conventional general external magnet type magnetic circuit.
【図１０】従来の反発磁気回路型スピーカの要部を示す
拡大断面図。FIG. 10 is an enlarged cross-sectional view showing a main part of a conventional repulsive magnetic circuit type speaker.
【図１１】従来の反発磁気回路型スピーカの磁気分布を
示す局部断面図。FIG. 11 is a local sectional view showing the magnetic distribution of a conventional repulsive magnetic circuit type speaker.
【図１２】ダンパ内径部をボイスコイル下端部近傍に配
置して接着した場合の不具合を説明するための局部拡大
断面図。FIG. 12 is a local enlarged cross-sectional view for explaining a problem when the damper inner diameter portion is arranged in the vicinity of the voice coil lower end portion and bonded.
１ ボイスコイル １Ｌ ボイスコイル外周部 １ｂ ボイスコイル下端縁 ２ ダンパ ２１ ダンパの内径部 ２１Ｌ 垂直部 ２１ｂ 平坦部 ２Ｗ 導電ダンパ ２ｃ コルゲーション ３ 平編錦糸線 Ｄ 振動板 Ｍ１ マグネット Ｍ２ マグネット Ｐ センタープレート Ｒ 組立リング ｈ 接着剤 1 voice coil 1L voice coil outer circumference 1b Voice coil bottom edge 2 damper 21 Inside diameter of damper 21L vertical part 21b Flat part 2W conductive damper 2c corrugation 3 flat knitting wire D diaphragm M1 magnet M2 magnet P Center plate R assembly ring h adhesive
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H04R 9/00 H04R 1/00 310 H04R 9/04 105 Front page continuation (58) Fields surveyed (Int.Cl. 7 , DB name) H04R 9/00 H04R 1/00 310 H04R 9/04 105
Claims (4)
ように配置して両マグネット間に介在せしめた磁性材か
らなるセンタープレートの外周に反発磁束による磁界が
形成されるようにし、該磁界内にボイスコイルを配置し
てなる反発磁気回路型スピーカにおいて、上記 ボイスコイルを支持するダンパの内径部には、上記
ボイスコイルの下端縁に固定するための平坦部が設けら
れていて、該平坦部とボイスコイルの下端縁とが接着固
定されていることを特徴とするスピーカの構造。1. A magnetic field due to repulsive magnetic flux is formed on the outer periphery of a center plate made of a magnetic material, which is formed by arranging two magnets so that the same poles face each other, and the magnetic field is formed. in repulsion magnetic circuit type loudspeaker formed by arranging the voice coil within, the inner diameter portion of the damper for supporting the voice coil, has a flat portion is provided for securing the lower edge of the <br/> voice coil Te, the structure of the loudspeaker and the lower edge of the flat part and the voice coil is characterized in that it is bonded and fixed.
形のコルゲーションとの間に、前記ボイスコイルの下部
外周に当接する垂直部が設けられていて、該垂直部と前
記ボイスコイルの外周部及び前記平坦部と前記ボイスコ
イルの下端縁とがそれぞれ接着固定されていることを特
徴とする請求項１記載のスピーカの構造。Between the wherein the corrugation of the innermost of the waveform of the said flat portion damper, the the lower periphery of the voice coil have vertical portion is provided in contact, before and the vertical portion
The outer peripheral portion and the structure of a loudspeaker according to claim 1, wherein said flat portion and the lower edge of the voice coil is characterized in that it is bonded each serial voice coil.
ることを特徴とする請求項１又は２記載のスピーカの構
造。3. The speaker structure according to claim 1, wherein the voice coil has a bobbinless structure.
部を設けた導電ダンパであることを特徴とする請求項１
から３のいずれか１項に記載のスピーカの構造。4. The conductive damper, wherein the conductive knitting thread wire is attached to the damper and the conductive portion is provided.
4. The structure of the speaker according to any one of 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19930297A JP3431459B2 (en) | 1997-07-09 | 1997-07-09 | Speaker structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19930297A JP3431459B2 (en) | 1997-07-09 | 1997-07-09 | Speaker structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1132390A JPH1132390A (en) | 1999-02-02 |
| JP3431459B2 true JP3431459B2 (en) | 2003-07-28 |
Family
ID=16405549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19930297A Expired - Fee Related JP3431459B2 (en) | 1997-07-09 | 1997-07-09 | Speaker structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3431459B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4529038B2 (en) * | 2001-03-09 | 2010-08-25 | オンキヨー株式会社 | Small speaker |
| JP2005269331A (en) | 2004-03-19 | 2005-09-29 | Pioneer Electronic Corp | Loudspeaker apparatus and manufacturing method thereof |
| CN201690585U (en) * | 2010-04-30 | 2010-12-29 | 苏州上声电子有限公司 | Thin-type loudspeaker for automobile |
| CN107580286A (en) * | 2017-09-18 | 2018-01-12 | 东莞市赞歌声学科技有限公司 | A kind of loudspeaker of new bullet ripple |
-
1997
- 1997-07-09 JP JP19930297A patent/JP3431459B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1132390A (en) | 1999-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3148520B2 (en) | Speaker structure | |
| JP2940588B2 (en) | Voice coil structure | |
| JP3478466B2 (en) | Speaker | |
| JP2981360B2 (en) | Speaker structure | |
| JP2012109669A (en) | Speaker | |
| CN110830890B (en) | Voice coil assembly and loudspeaker | |
| JP3431459B2 (en) | Speaker structure | |
| CN110418255B (en) | Sound production monomer, sound production module and electronic terminal | |
| WO2003010997A1 (en) | Flat speaker of full-face driving | |
| JP3011826B2 (en) | Speaker | |
| JP2003259485A (en) | Speaker and method of manufacturing the same | |
| CN217904647U (en) | Sound production device and electronic equipment | |
| JP2592066Y2 (en) | Speaker | |
| JP3456819B2 (en) | Speaker and method of manufacturing the same | |
| JP3491569B2 (en) | Conductive damper and conductive damper type speaker | |
| CN108924717B (en) | Signal transmission structure of loudspeaker | |
| JP3207692B2 (en) | Speaker structure | |
| JP2011217283A (en) | Tinsel wire for loudspeaker device, and loudspeaker device | |
| JP2996842B2 (en) | Speaker | |
| CN218634279U (en) | Vibration displacement speaker and speaker | |
| CN218387874U (en) | Voice coil and sound production device using same | |
| JP2000156897A (en) | Speaker unit structure | |
| JP2000358295A (en) | Repulsion flat speaker | |
| CN115665629A (en) | Vibration displacement speaker and speaker | |
| JP2600037Y2 (en) | Speaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030430 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080523 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090523 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100523 Year of fee payment: 7 |
|
| LAPS | Cancellation because of no payment of annual fees |