JPH11205897A - Loudspeaker - Google Patents

Loudspeaker

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Publication number
JPH11205897A
JPH11205897A JP665398A JP665398A JPH11205897A JP H11205897 A JPH11205897 A JP H11205897A JP 665398 A JP665398 A JP 665398A JP 665398 A JP665398 A JP 665398A JP H11205897 A JPH11205897 A JP H11205897A
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speaker
magnetic circuit
rectangular
type
magnetic
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JP665398A
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Japanese (ja)
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JP4013307B2 (en )
Inventor
Takashi Sabato
隆史 鯖戸
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Matsushita Electric Ind Co Ltd
松下電器産業株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a loudspeaker that is applied to various elecctroacoustic transducers and has superior acoustic characteristic.
SOLUTION: A magnetic gap 20 of a magnetic circuit of this loudspeaker is shaped rectangular and an outer shape of the magnetic circuit is shaped rectangular, and a frame 17, a voice coil 21, a damper 22, a diaphragm 23 and a neck part of a dust cap 24 are al shaped rectangular. Thus, even when a speaker of elliptical type, track type or the like having a different ratio of major diameter to minor diameter is manufactured, or when a speaker restricted in its shape such as space or diameter size, or a speaker with determined size is manufactured, the structure is freely formed without sacrificing an output sound pressure level, a high magnetic flux density is maintained to earn a sufficient output sound pressure level, and a slim and compact shape having provision for any condition and an extended high frequency characteristic are realized with excellent acoustic performance.
COPYRIGHT: (C)1999,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は各種音響機器に使用されるスピーカに関するものである。 BACKGROUND OF THE INVENTION The present invention relates to a speaker used in various acoustic devices.

【0002】 [0002]

【従来の技術】近年、デジタル信号処理技術が飛躍的に進歩しスピーカに供給される電気信号の質が大幅に向上したため、これに対応して高音質再生の可能なスピーカの開発が強く望まれている。 In recent years, since the quality of the electrical signals digital signal processing techniques are provided to dramatically advanced speaker is greatly improved and, correspondingly capable loudspeaker development of high-quality playback is strongly desired ing.

【0003】従来のスピーカについて図6、図7により説明する。 [0003] described conventional speaker 6, the Figure 7. 図6は上記従来のスピーカの長および短径側から見た断面を示した断面図であり、図7は同要部である円形磁気回路の平面図を示すものである。 Figure 6 is a cross-sectional view showing a cross section as viewed from the long and the short diameter side of the conventional speaker, FIG. 7 shows a plan view of a circular magnetic circuit is the same essential part. 同図において、1はセンターポールを備えたボトムプレートであり、2はこのボトムプレート1に固着したリング状のメインマグネット、3はこのマグネット2の上面に固着したトッププレートである。 In the figure, 1 is a bottom plate having a center pole, 2 ring shaped main magnet which is fixed to the bottom plate 1, 3 is a top plate fixed to the upper surface of the magnet 2. 4はこれらボトムプレート1 4 These bottom plate 1
とリング状のメインマグネット2とトッププレート3で形成された円形の磁気回路に結合したフレームである。 And a frame attached to a circular magnetic circuit formed by the ring-shaped main magnet 2 and the top plate 3.

【0004】5はボトムプレート1の下面にメインマグネット2とは逆方向に着磁を施し固着したリング状のキャンセルマグネットであり、6は円形の磁気回路全体を覆うシールドカバーである。 [0004] 5 is a ring-shaped canceling magnet fixed subjected to magnetization in the opposite direction to the main magnet 2 to the lower surface of the bottom plate 1, 6 is a shield cover that covers the entire circular magnetic circuit.

【0005】7はトッププレート3の内周とボトムプレート1のセンターポールの外周面で構成される磁気ギャップ中に保持されたボイスコイルであり、8はボイスコイル7に固着した楕円型のダンパーであり、9はボイスコイル7の先端に固着した楕円型の振動板である。 [0005] 7 is a voice coil held in a magnetic gap formed in the outer peripheral surface of the center pole inner periphery and the bottom plate 1 of the top plate 3, 8 in the oval-shaped dampers fixed to the voice coil 7 There, 9 is a diaphragm elliptical fixed to the distal end of the voice coil 7. 10 10
は振動板9の中央上面に貼られたダストキャップである。 Is a dust cap affixed to the central upper surface of the vibration plate 9.

【0006】aは振動板9とボイスコイル7の貼り付け部の角度を示す長径側頂角である。 [0006] a is the long diameter side apex angle indicating the angle of the pasted portion of the diaphragm 9 and voice coil 7. 11は磁気回路の円形の磁気ギャップである。 11 is a circular magnetic gap in the magnetic circuit. 12は円形の磁気回路の長径比であり、13は円形の磁気回路の短径比であり、この長径と短径の比率はこのスピーカにおいては1:1で構成されている。 12 is a major axis ratio of a circular magnetic circuit 13 is the minor diameter ratio of the circular magnetic circuit 1 in this major and the ratio of the minor axis is the speaker: is composed of 1.

【0007】以上のように構成された従来のスピーカについて以下にその動作を説明する。 [0007] Hereinafter the operation for conventional loudspeaker constructed as above will be described. まず、スピーカのボイスコイル7に電気信号が加えられると磁気回路に駆動力が発生する。 First, the driving force in the magnetic circuit is generated when an electrical signal is applied to the voice coil 7 of a speaker.

【0008】この駆動力がボイスコイル7に伝達され、 [0008] The driving force is transmitted to the voice coil 7,
その先端に固着された楕円型の振動板9を振動させその振動に応じた音を放射するものである。 The sound corresponding to the vibration vibrates the vibration plate 9 of the anchored oval at the tip is intended to emit. 更に外部への磁気影響を少なくするため、キャンセルマグネット5とシールドカバー6によって磁気を遮断している。 To further reduce the magnetic influence on the outside, blocking the magnetic by canceling magnet 5 and the shield cover 6.

【0009】又、振動によって放射する音を大きくするためメインマグネット2やキャンセルマグネット5等で構成される円形の磁気回路の大きさを大きくして出力音圧レベルを稼いでいた。 [0009] Furthermore, it had earned increased to output sound pressure level the magnitude of the magnetic circuit of the circular composed of the main magnet 2 or cancel magnet 5 or the like to increase the sound emitted by the vibration. 又、音圧周波数特性の高域再生限界を伸ばすために、振動板9とボイスコイル7の貼り付け部で形成する角度の特に長径側頂角aをできる限り小さくして高域特性の向上を図っていた。 Further, in order to extend the high-frequency reproduction limit of the sound pressure frequency characteristic, an improvement in small and high-frequency characteristics unless possible long diameter side apex angle a of the angle formed by the sticking portion of the diaphragm 9 and voice coil 7 It had attempted.

【0010】 [0010]

【発明が解決しようとする課題】しかしながら上記従来の構成では、放射する音を大きくする即ち出力音圧レベルを稼ぐために、スピーカのフレーム4の底面にメインマグネット2やキャンセルマグネット5等で形成した円形の磁気回路を大きくして出力音圧レベルを維持しなくてはならず、特に磁気回路を円形で構成しているため、 In the [0005] However the conventional configuration, in order to make words output sound pressure level to increase the sound emitting, formed on the bottom surface of the frame 4 of the speaker in the main magnet 2 or cancel magnet 5 or the like not have to maintain a large and output sound pressure level of the magnetic circuit of the circular, for particularly constituting a magnetic circuit in a circular,
楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズなどの形状の制約やサイズの決められた場合は出力音圧レベルを犠牲にして構造を成り立たせていた。 Hold the structure if a predetermined constraints and sizes of shapes, such as elliptical or track-type such as diameter and aperture size of the ratio of the minor axis are different types and limited space and speaker at the expense of output sound pressure level not had.

【0011】又、出力音圧レベルを維持するためには、 [0011] In addition, in order to maintain the output sound pressure level,
反対にスピーカのフレーム4より円形の磁気回路の方が大きくはみ出ることになり、使用用途などに大きく制限が強いられることになった。 Will be protrude greatly toward the circular magnetic circuit than the frame 4 of the speaker on the opposite, it had to like greatly limited use applications are strong. 更に振動板9とボイスコイル7の貼り付け部で形成する角度の特に長径側頂角aが大きくなるため、音圧周波数特性の高域再生限界の低下をも招き、高域特性に悪影響を及ぼしていた。 To further particularly long diameter side apex angle a of the angle formed by the sticking portion of the diaphragm 9 and voice coil 7 becomes large, and lead to high-frequency reduction in regeneration limit of the sound pressure frequency characteristics, have an adverse effect on the high-frequency characteristics which was.

【0012】本発明は上記従来の課題を解決するもので楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズの中でも、 [0012] The present invention is also in aperture size of the major axis and the type ratio of the short diameter is different and limited space and speaker elliptical or track-type or the like in order to solve the conventional problems described above,
高い磁束密度を維持して十分な出力音圧レベルを稼ぐことができ、どのような条件下でも対応できるスリムでコンパクトな形状と伸びのある高域特性を実現する優れた音響性能を兼ね備えたスピーカを提供することを目的とするものである。 While maintaining a high magnetic flux density can earn sufficient output sound pressure level, combines superior acoustic performance to realize a high-frequency characteristics with a compact shape and elongation slim can cope with all conditions loudspeaker it is an object to provide a.

【0013】 [0013]

【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は、スピーカのフレームの底面にメインマグネットやキャンセルマグネット等で形成した磁気回路の磁気ギャップの形状が矩形型で、磁気回路の外径も矩形型で、更にその磁気回路の短径側と長径側の寸法が異なる構成から成り、そこに結合するフレームとボイスコイルとダンパーと振動板とダストキャップのネック部が矩形型の構造を有することにより、楕円型やトラック型等の長径と短径の比が異なるタイプや限られたスペース及びスピーカの口径サイズの中でも、高い磁束密度を維持して十分な出力音圧レベルを稼ぐことができ、 Speaker of the present invention to solve the above object, according to an aspect of the shape of the magnetic gap of the magnetic circuit formed by the main magnet or cancel magnet or the like on the bottom surface of the frame of the speaker is a rectangular type, a magnetic in outer diameter rectangular type of circuit, further minor axis and major axis side consists dimensions different configurations, diaphragm and neck is rectangular-shaped dust cap frame and the voice coil and damper attached thereto of the magnetic circuit of by having a structure, among the aperture size of the elliptic or track-type or the like of the major axis and the minor axis ratio different types and limited space and a speaker, a sufficient output sound pressure level to maintain a high flux density You can earn,
スリムでコンパクトな形状と伸びのある高域特性を実現する優れた音響性能を兼ね備えたスピーカの提供を可能とするものである。 And it makes it possible to provide a loudspeaker that combines superior acoustic performance to realize a high-frequency characteristics with a compact shape and stretch slim.

【0014】 [0014]

【発明の実施の形態】本発明の請求項1に記載の発明は、磁気回路の磁気ギャップの形状が矩形型で、磁気回路の外径も矩形型で、更にその磁気回路の短径側と長径側の寸法が異なる構成とし、これに結合するフレームとボイスコイルとダンパーと振動板も矩形型の構成として、楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズの中でも、高い磁束密度を維持して十分な出力音圧レベルを稼ぐことができ、スリムでコンパクトな形状と伸びのある高域特性を実現する優れた音響性能を有するスピーカを提供するものである。 The invention according to claim 1 of the embodiment of the present invention is a rectangular shape of the magnetic gap of the magnetic circuit, an outer diameter smaller rectangular type magnetic circuit, further the short diameter side of the magnetic circuit the dimensions of the major axis side is different configurations, as the diaphragm is also a rectangular type configuration the frame and the voice coil and the damper that binds thereto, oval or major axis and the ratio of the minor axis of the track type, and the like are different types and limited space and among the aperture size of the speaker, to maintain a high flux density can earn sufficient output sound pressure level, a speaker having excellent sound performance for high-frequency characteristics with a compact shape and elongation slim it is intended to provide.

【0015】本発明の請求項2に記載のものは、磁気回路の磁気ギャップを短径側と長径側で異ならせた不均一な寸法で構成したものであり、楕円型やトラック型等の長径と短径の比が違うタイプに多く見られる振幅モードの乱れやボイスコイルなどのシーソー現象を軽減させると共に、組立時の磁気ギャップの寸法バラツキをも吸収するものである。 The [0015] pump of Claim 2 of the present invention, which is constituted by non-uniform size having different magnetic gap of the magnetic circuit at the short diameter and long diameter side, the major axis of such oval or track type and with a ratio of minor axis to reduce the seesaw phenomenon such as different types often seen amplitude mode disturbances and the voice coil is intended to absorb the dimensional variations of the magnetic gap during assembly.

【0016】以下に本発明のスピーカの一実施の形態について図1〜図5により説明する。 [0016] will be described with reference to FIGS. 1 to 5 An embodiment of the loudspeaker of the present invention are described below. なお、説明にあたっては従来技術と同一技術と同一部分には同一品番を付与し、説明を省略して説明する。 Note that description when imparts the same part in the prior art the same technique and same parts are described with omitted.

【0017】(実施の形態1)図1は本発明の一実施の形態のスピーカの長および短径側から見た断面を1図で示した断面図であり、図2は同スピーカの分解斜視図であり、図3は同矩形型の磁気回路の平面図である。 [0017] is a sectional view showing in cross section a view of the speaker of the long and short diameter side of the embodiment of FIG. 1 (Embodiment 1) The present invention, FIG 2 is an exploded perspective of the speaker a diagram, FIG. 3 is a plan view of a magnetic circuit of the rectangular type. 本発明と従来技術との相違点のみ同図により説明すると、1 Referring to the drawing only difference between the present invention and the prior art, 1
4は矩形型のボトムプレートであり、15は矩形型のメインマグネットであり、16は矩形型のトッププレートであり、17は矩形型のフレームで、18は矩形型のキャンセルマグネットであり、19は矩形型シールドカバーであり、20は矩形型の磁気ギャップである。 4 is a rectangular-bottom plate, 15 is a rectangular type of main magnet 16 is a rectangular shaped top plate, 17 is a rectangular type frame, 18 is a rectangular type cancel magnet, 19 a rectangular type shield cover, 20 is a magnetic gap of the rectangular type. 21は矩形型のボイスコイルであり、22は矩形型のダンパーであり、23は矩形型の振動板であり、24は矩形型のダストキャップであり、Aは矩形型の振動板23と矩形型のボイスコイル21の貼り付け部で形成する角度の特に長径側頂角を示すものであり、各図からも判るように夫々の矩形型は長径と短径の比を異なる矩形型の形状としている。 21 is a rectangular type voice coil, 22 is a rectangular type of damper, 23 is a rectangular shaped diaphragm of, 24 are rectangular-shaped dust cap, A is the vibration plate 23 and the rectangular shaped rectangular type of it shows a particularly long diameter side apex angle of the angle formed by the sticking portion of the voice coil 21, a rectangular type each as can be seen from the figures has a rectangular-like shape having different major axis and the ratio of the minor axis .

【0018】本実施の形態においては、磁気回路の磁気ギャップ20の形状が矩形型で、磁気回路の外径も矩形型で、更にその磁気回路の短径と長径の寸法が違う構造から成り、そこに結合するフレーム17とボイスコイル21とダンパー22と振動板とダストキャップ24のネック部全てが矩形型の構造を有してフレーム17からはみ出すことが無く、特に磁気回路を矩形型で構成しているため、楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズなどの形状の制約やサイズの決められた場合でも出力音圧レベルを犠牲にすることが無く構造を自由に成り立たせることができ、楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズの中でも、高 In the present embodiment, in a rectangular shape of the magnetic gap 20 of the magnetic circuit, an outer diameter smaller rectangular type magnetic circuit comprises further a minor and major axis dimension is different structure of the magnetic circuit, without being beyond the frame 17 and the voice coil 21 and the damper 22 and the vibration plate and the neck all the dust cap 24 has a structure of a rectangular-shaped frame 17 attached thereto, constitute in particular a magnetic circuit in a rectangular type and for which, at the expense of major and output sound pressure level even when the predetermined constraints and sizes of shapes, such as aperture size of the ratio of the minor axis are different types and limited space and speaker elliptical or track-type or the like without structure that can be freely hold the, among aperture size of elliptic or track-type or the like of the major axis to the type of the ratio of minor axis are different and limited space and a speaker, a high 磁束密度を維持して十分な出力音圧レベルを稼ぐことができ、どのような条件下でも対応できるスリムでコンパクトな形状と伸びのある高域特性を実現する優れた音響性能を兼ね備えたスピーカを提供できるものである。 To maintain magnetic flux density can earn sufficient output sound pressure level, what loudspeaker combines superior acoustic performance to realize a high-frequency characteristics with a compact shape and elongation slim can cope with conditions it is those that can be provided.

【0019】図4は従来のスピーカと本実施の形態の音圧周波数特性と第2高調波歪特性を示すものであるが、 [0019] Although FIG. 4 shows a sound pressure frequency characteristic and the second harmonic distortion characteristic of the conventional speaker as the present embodiment,
本実施の形態のスピーカは、全帯域にわたって従来のスピーカの音圧周波数特性29と比べ高い音圧周波数特性28を示していることがわかる。 Speaker of the present embodiment, it can be seen that shows the high sound pressure frequency characteristic 28 compared with the sound pressure frequency characteristic 29 of the conventional speaker over the entire band. また、音圧周波数特性の低音域においても伸びのある低域再生を示し高音域においても著しく伸びのある高域特性を実現している。 Also, to achieve high-frequency characteristics with a significantly extended even in the low-frequency high sound indicates playback even with growth in the low frequency range of sound pressure frequency characteristics. 更に第2高調波歪(従来のもの31)に比べて、本実施の形態のもの(30)は低歪化を実現して高いリニアリティが得られることが確認できる。 Furthermore, compared to the second harmonic distortion (legacy 31), those of the embodiment (30) it can be confirmed that high linearity to achieve low-distortion can be obtained.

【0020】(実施の形態2)本発明のスピーカの他の実施の形態を図5により説明する。 [0020] Another embodiment of the speaker (Embodiment 2) The present invention will be described with reference to FIG.

【0021】図5は本発明の他の実施の形態の矩形型磁気回路の平面図である。 [0021] FIG. 5 is a plan view of a rectangular type magnetic circuit of another embodiment of the present invention. 本発明と従来技術との相違点のみ同図により説明すると、25は長径側と短径側の磁気ギャップの寸法を異ならせた矩形型不均一磁気ギャップで、26は矩形型不均一磁気ギャップ25の長径側ギャップであり、27は矩形型不均一磁気ギャップ25の短径側ギャップである。 Referring to the drawing only difference between the present invention and the prior art, 25 the major diameter side and the rectangular-type heterogeneous magnetic gap having different dimensions of the magnetic gap of the minor axis, 26 rectangular Unequal magnetic gap 25 a long diameter side gap, 27 is a short diameter side gap of the rectangular-type heterogeneous magnetic gap 25.

【0022】本実施の形態においては、特に短径側ギャップ27の寸法より長径側ギャップ26の寸法の方が大きい構造を有するようにしたことにより、均一な磁気ギャップでは防ぐことのできなかった楕円型やトラック型等の長径と短径の比が違うタイプに多く見られる振幅時のリニアリティの劣化を長径側ギャップ26が許容して短径側ギャップ27とバランスを取ることにより、振幅モードの乱れやボイスコイルなどのシーソー現象を軽減させると共に、組立時の長短径の磁気ギャップの寸法バラツキをも長径側と短径側の寸法比で吸収することができるものである。 [0022] In this embodiment, not particularly by having to have a structure the larger dimension of the major axis side gap 26 than the dimension of the minor axis gap 27, it can be prevented in a uniform magnetic gap ellipse by taking the major axis and minor axis gap 27 and balance long diameter side gap 26 to allow the deterioration of the linearity at the time of amplitude ratio of the minor axis is common in type different types and track types, etc., in the amplitude mode disturbance and with reducing the seesaw phenomenon such as a voice coil, in which the dimensional variation of the magnetic gap length diameter during assembly can be absorbed by the dimensional ratio of the major axis side and the minor axis.

【0023】なお、上記各実施の形態においては、磁気回路の外径形状を矩形型としているが形状は、トラック型や正方形型や長方形型など非円形であれば、制約はなくどのような形状においても同様の効果が得られるものである。 [0023] In the above embodiments, although a rectangular-type outer shape of the magnetic circuit shaped, if non-circular, such as trucks type, square type or rectangular type, what not constrained shape in which the same effect can be obtained in the.

【0024】 [0024]

【発明の効果】以上のように本発明は、磁気回路の磁気ギャップの形状が矩形型で、磁気回路の外径も矩形型で、更にその磁気回路の短径側と長径側の寸法が違う構造から成り、そこに結合するフレームとボイスコイルとダンパーと振動板も矩形型の構造とすることにより、楕円型やトラック型等の長径と短径の比が違うタイプや限られたスペース及びスピーカの口径サイズの中でも、高い磁束密度を維持して十分な出力音圧レベルを稼ぐことができ、どのような条件下でも対応できるスリムでコンパクトな形状と伸びのある高域特性を実現する優れた音響性能を兼ね備えたスピーカを実現できるものである。 The present invention as described above, according to the present invention is a rectangular shape of the magnetic gap of the magnetic circuit, an outer diameter smaller rectangular type magnetic circuit, further is different length of the short diameter and long diameter side of the magnetic circuit made structure, by the frame and the voice coil and the damper coupling structure of the diaphragm is also rectangular type therein, the type and limited space and a speaker major and the ratio of the minor axis of the elliptical or track-type or the like is different among the aperture size of the high to maintain the magnetic flux density can earn sufficient output sound pressure level, excellent for high-frequency characteristics with a compact shape and elongation slim can cope with all conditions in which it can realize a speaker that combines acoustic performance.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明のスピーカの一実施の形態の断面図 Sectional view of one embodiment of a speaker of the present invention; FIG

【図2】同分解斜視図 FIG. 2 is a exploded perspective view

【図3】同要部である矩形型の磁気回路の平面図 Figure 3 is a plan view of a rectangular type magnetic circuit is the same essential part

【図4】同音圧周波数特性および第2高調波歪特性の特性図 [4] characteristic diagram homophone pressure frequency characteristic and the second harmonic distortion characteristic

【図5】本発明のスピーカの他の実施の形態の要部である矩形型磁気回路の平面図 Plan view of a rectangular type magnetic circuit is a main part of another embodiment of a speaker of the present invention; FIG

【図6】従来のスピーカの断面図 6 is a cross-sectional view of a conventional loudspeaker

【図7】同要部である磁気回路の平面図 Figure 7 is a plan view of a magnetic circuit is the same essential part

【符号の説明】 14 ボトムプレート 15 メインマグネット 16 トッププレート 17 フレーム 18 キャンセルマグネット 19 シールドカバー 20 磁気ギャップ 21 ボイスコイル 22 ダンパー 23 振動板 24 ダストキャップ 25 不均一磁気ギャップ 26 ギャップ 27 ギャップ A 長径側頂角 [Description of Reference Numerals] 14 bottom plate 15 main magnet 16 top plate 17 frame 18 cancel magnet 19 shield cover 20 magnetic gap 21 the voice coil 22 Damper 23 diaphragm 24 Dust cap 25 inhomogeneous magnetic gap 26 gap 27 gap A long diameter side apex angle

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 磁気回路の磁気ギャップの形状が矩形型で、磁気回路の外径も矩形型とし、これに結合するフレームとボイスコイルとダンパーと振動板も矩形型としたスピーカ。 In 1. A rectangular shape of the magnetic gap of the magnetic circuit, the outside diameter of the magnetic circuit is also a rectangular type, and a frame and a voice coil and the damper that binds to the vibration plate is also a rectangular speaker.
  2. 【請求項2】 磁気回路の磁気ギャップが長径側と短径側で寸法を異ならせた請求項1に記載のスピーカ。 2. A speaker according to claim 1 in which the magnetic gap is made different dimensions in long diameter side and the shorter diameter side of the magnetic circuit.
JP665398A 1998-01-16 1998-01-16 Speaker Expired - Lifetime JP4013307B2 (en)

Priority Applications (1)

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JP665398A JP4013307B2 (en) 1998-01-16 1998-01-16 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP665398A JP4013307B2 (en) 1998-01-16 1998-01-16 Speaker

Publications (2)

Publication Number Publication Date
JPH11205897A true true JPH11205897A (en) 1999-07-30
JP4013307B2 JP4013307B2 (en) 2007-11-28

Family

ID=11644348

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060220A1 (en) * 2001-01-26 2002-08-01 Sonionkirk A/S An electroacoustic transducer
JP2006196961A (en) * 2005-01-11 2006-07-27 Foster Electric Co Ltd Magnetic circuit for electroacoustic transducer
US7388964B2 (en) * 2003-01-31 2008-06-17 Matsushita Electric Industrial Co., Ltd. Loudspeaker, and module and electronic apparatus using the loudspeaker
JP2008148218A (en) * 2006-12-13 2008-06-26 Pioneer Electronic Corp Magnetic circuit for speaker, and speaker
JP2009049762A (en) * 2007-08-21 2009-03-05 Pioneer Electronic Corp Magnetic circuit for speaker, and speaker device
JP2010016889A (en) * 2009-10-19 2010-01-21 Panasonic Corp Loudspeaker
JP2010016890A (en) * 2009-10-19 2010-01-21 Panasonic Corp Loudspeaker

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060220A1 (en) * 2001-01-26 2002-08-01 Sonionkirk A/S An electroacoustic transducer
EP1439731A1 (en) * 2001-01-26 2004-07-21 Sonionkirk A/S An electroacoustic transducer
US7062063B2 (en) 2001-01-26 2006-06-13 Sonion Horsens A/S Electroacoustic transducer
US7376240B2 (en) 2001-01-26 2008-05-20 Sonion Horsens A/S Coil for an electroacoustic transducer
US7388964B2 (en) * 2003-01-31 2008-06-17 Matsushita Electric Industrial Co., Ltd. Loudspeaker, and module and electronic apparatus using the loudspeaker
JP2006196961A (en) * 2005-01-11 2006-07-27 Foster Electric Co Ltd Magnetic circuit for electroacoustic transducer
JP2008148218A (en) * 2006-12-13 2008-06-26 Pioneer Electronic Corp Magnetic circuit for speaker, and speaker
JP2009049762A (en) * 2007-08-21 2009-03-05 Pioneer Electronic Corp Magnetic circuit for speaker, and speaker device
JP2010016889A (en) * 2009-10-19 2010-01-21 Panasonic Corp Loudspeaker
JP2010016890A (en) * 2009-10-19 2010-01-21 Panasonic Corp Loudspeaker

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