JP2005151318A - Speaker - Google Patents

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Publication number
JP2005151318A
JP2005151318A JP2003387934A JP2003387934A JP2005151318A JP 2005151318 A JP2005151318 A JP 2005151318A JP 2003387934 A JP2003387934 A JP 2003387934A JP 2003387934 A JP2003387934 A JP 2003387934A JP 2005151318 A JP2005151318 A JP 2005151318A
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Japan
Prior art keywords
diaphragm
annular flat
bobbin
magnetic circuit
speaker
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JP2003387934A
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Japanese (ja)
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Hisayoshi Sugawara
久芳 菅原
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Alpine Electronics Inc
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Alpine Electronics Inc
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Priority to JP2003387934A priority Critical patent/JP2005151318A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a "speaker" wherein a maximum amplitude permitted for a diaphragm is increased without giving an adverse effect to an operating characteristic at a high sound frequency and to thinning. <P>SOLUTION: The speaker 21 is provided with: a magnetic circuit 22; a voice coil 24 wound on a bobbin 23; the diaphragm 25 adhered and fixed to the base end of the bobbin 23; a damper 29 for supporting an inner circumferential part of the diaphragm 25; a frame 27 for supporting the peripheral of the diaphragm 25 via a peripheral edge 26; a cover 28 for supporting the periphery of the damper 29; and a dust-proof cap 30 capped to the bobbin 23. An annular flat part 25a flat over the entire circumference is formed to the inner circumferential part of the diaphragm 25. The outer diameter of the annular flat part 25a is selected nearly equal to the outer diameter of the end face 33b of the magnetic circuit 22 at a side opposed to the annular flat part 25a and the inner circumferential part of the damper 29 and the periphery of the dust-proof cap 30 are adhered and fixed to the annular flat part 25a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は動電型のスピーカに係り、特に、薄型化が容易で車載用等に好適なスピーカに関する。   The present invention relates to an electrodynamic loudspeaker, and more particularly to a loudspeaker that can be easily reduced in thickness and is suitable for in-vehicle use.

従来より、円錐状の振動板の開口方向に磁気回路を配置し、この振動板でボビンをスカート状に包囲することにより、全体の高さ寸法を抑えた薄型化に好適な動電型スピーカが知られている（例えば、特許文献１参照）。   Conventionally, an electrodynamic loudspeaker suitable for thinning with a reduced overall height is provided by arranging a magnetic circuit in the opening direction of a conical diaphragm and surrounding the bobbin in a skirt shape with this diaphragm. It is known (see, for example, Patent Document 1).

図３はかかる従来の動電型スピーカを示す断面図である。同図に示すスピーカ１は、磁気ギャップＧを有する磁気回路２と、ボビン３に巻装されて磁気ギャップＧ内に配置されたボイスコイル４と、円錐状のコーン紙等からなり内周部がボビン３の基端部に接着固定された振動板５と、磁気回路２に固定されて振動板５の外周部を外周エッジ部６を介して支持するフレーム７と、このフレーム７の外周部に固定されたカバー８と、内周部がボビン３の基端部に連結されて固定端側の外周部がカバー８に取着されたダンパ９と、ボビン３に冠着された防塵キャップ１０とによって主に構成されており、振動板５がボビン３をスカート状に包囲しているため全体の高さ寸法が抑えられている。また、磁気回路２は、ポールピース１１と、径方向に沿って着磁されてポールピース１１の外周部に固定された円環状のマグネット１２と、マグネット１２を包囲する円筒部１３ａを有してポールピース１１を載置固定したヨーク１３とによって構成される内磁型であり、マグネット１２とヨーク１３の円筒部１３ａとの間に磁気ギャップＧが形成されている。   FIG. 3 is a sectional view showing such a conventional electrodynamic speaker. The speaker 1 shown in FIG. 1 includes a magnetic circuit 2 having a magnetic gap G, a voice coil 4 wound around a bobbin 3 and disposed in the magnetic gap G, a cone-shaped cone paper, and the like. A diaphragm 5 that is bonded and fixed to the base end of the bobbin 3, a frame 7 that is fixed to the magnetic circuit 2 and supports the outer peripheral portion of the diaphragm 5 via an outer peripheral edge portion 6, and an outer peripheral portion of the frame 7 A fixed cover 8, a damper 9 whose inner periphery is connected to the base end of the bobbin 3 and whose outer periphery on the fixed end is attached to the cover 8, and a dust cap 10 that is crowned on the bobbin 3, Since the diaphragm 5 surrounds the bobbin 3 in a skirt shape, the overall height is suppressed. The magnetic circuit 2 includes a pole piece 11, an annular magnet 12 that is magnetized along the radial direction and fixed to the outer periphery of the pole piece 11, and a cylindrical portion 13 a that surrounds the magnet 12. It is an inner magnet type constituted by a yoke 13 on which a pole piece 11 is placed and fixed, and a magnetic gap G is formed between the magnet 12 and the cylindrical portion 13 a of the yoke 13.

このように構成されたスピーカ１は、図示せぬリード線を介してボイスコイル４に音声電流が通電されると、電磁力によりボイスコイル４が振動するので、ボビン３を介して振動板５が駆動されて振動し、ラジオ音声や各種記録媒体の再生音声などの拡声が行えるようになっている。
特開平８−２３７７９４号公報（第３−４頁、図４） In the speaker 1 configured as described above, when a voice current is applied to the voice coil 4 via a lead wire (not shown), the voice coil 4 vibrates due to electromagnetic force. Driven and vibrated, it is possible to make loud sounds such as radio sound and playback sound of various recording media.
JP-A-8-237794 (page 3-4, FIG. 4)

前述した従来のスピーカ１は、ボビン３をスカート状に包囲する振動板５の一部が磁気回路２の図示上端面と近接している関係上、駆動時の振動板５に許容される最大振幅量Ａが小さく、その結果として、音量をあまり大きく設定することができないという問題があった。なお、最大振幅量Ａよりも大きな振幅で振動板５を振動させた場合、振動板５は磁気回路２（ヨーク１３）の図示上端面に当接するため損傷したり破損する危険性が高まる。また、図３において、外周エッジ部６を図示上方へ配置して振動板５のテーパ角度を大きくした場合、最大振幅量Ａを増大させることはできるが、テーパ角度が大きくなると高音域での振動板５の動作特性が劣化するため好ましくない。   In the conventional speaker 1 described above, the maximum amplitude allowed for the diaphragm 5 during driving is such that a part of the diaphragm 5 surrounding the bobbin 3 in a skirt shape is close to the upper end surface of the magnetic circuit 2 in the figure. There is a problem that the amount A is small, and as a result, the volume cannot be set too high. When the diaphragm 5 is vibrated with an amplitude larger than the maximum amplitude amount A, the diaphragm 5 comes into contact with the illustrated upper end surface of the magnetic circuit 2 (yoke 13), so that the risk of damage or breakage increases. In addition, in FIG. 3, when the outer peripheral edge portion 6 is arranged upward and the taper angle of the diaphragm 5 is increased, the maximum amplitude amount A can be increased, but when the taper angle is increased, the vibration in the high sound range is increased. This is not preferable because the operating characteristics of the plate 5 deteriorate.

本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、高音域での動作特性や薄型化に悪影響を及ぼさずに、振動板に許容される最大振幅量を増大させたスピーカを提供することにある。   The present invention has been made in view of the actual situation of the prior art, and its purpose is to increase the maximum amount of amplitude allowed for the diaphragm without adversely affecting the operating characteristics and thinning in the high sound range. It is to provide a speaker.

本発明のスピーカは、ボビンに連結される振動板の内周部にその全周に亘って平坦な環形平坦部を設け、この環形平坦部の外径を該環形平坦部に対向している磁気回路の端面の外径と同等かそれ以上に設定することによって、環形平坦部と磁気回路の該端面との間隔が振動板に許容される最大振幅量となるようにした。このような構成を採用すると、環形平坦部よりも径方向外側では振動板が磁気回路と干渉しないので、高音域での動作特性や薄型化に悪影響を及ぼすことなく、振動板に許容される最大振幅量を増大させたスピーカを実現できる。   In the speaker of the present invention, a flat annular flat portion is provided on the inner peripheral portion of the diaphragm connected to the bobbin over the entire circumference, and the outer diameter of the annular flat portion is opposed to the annular flat portion. By setting it to be equal to or larger than the outer diameter of the end face of the circuit, the distance between the annular flat portion and the end face of the magnetic circuit is set to the maximum amplitude amount allowed for the diaphragm. If such a configuration is adopted, the diaphragm does not interfere with the magnetic circuit on the outer side in the radial direction from the ring-shaped flat part, so that the maximum allowable value for the diaphragm is not affected without adversely affecting the operating characteristics and thinning in the high sound range. A speaker with an increased amplitude can be realized.

本発明のスピーカは、振動板の内周部に環形平坦部を設け、この環形平坦部よりも径方向外側では振動板が磁気回路と干渉しないようにしてあるので、高音域での動作特性や薄型化に悪影響を及ぼすことなく、振動板に許容される最大振幅量を増大させることができて、音量が不所望に制約されなくなる。   In the speaker of the present invention, an annular flat portion is provided on the inner peripheral portion of the diaphragm, and the diaphragm is prevented from interfering with the magnetic circuit on the outer side in the radial direction than the annular flat portion. The maximum amplitude allowed for the diaphragm can be increased without adversely affecting the thickness reduction, and the volume is not undesirably restricted.

本発明では、ボビンに巻装されたボイスコイルと、該ボイスコイルが配置される磁気ギャップを有する磁気回路と、内周部を前記ボビンに連結して該ボビンを包囲する振動板と、前記磁気回路に固定されて前記振動板の外周部を外周エッジ部を介して支持するフレームと、前記振動板に対し前記磁気回路とは逆側に配置されて該振動板の内周部を支持するダンパとを備え、前記ボイスコイルへ通電することによって前記振動板が駆動されるスピーカにおいて、前記振動板の内周部にその全周に亘って平坦な環形平坦部を設け、この環形平坦部の外径を、前記磁気回路のうち該環形平坦部に対向する側の端面の外径と同等またはそれ以上に設定した。   In the present invention, a voice coil wound around a bobbin, a magnetic circuit having a magnetic gap in which the voice coil is disposed, a diaphragm surrounding an bobbin by connecting an inner periphery to the bobbin, and the magnetic A frame that is fixed to a circuit and supports an outer peripheral portion of the diaphragm via an outer peripheral edge portion, and a damper that is disposed on the opposite side to the magnetic circuit with respect to the diaphragm and supports an inner peripheral portion of the diaphragm A speaker in which the diaphragm is driven by energizing the voice coil, a flat annular flat portion is provided on the inner peripheral portion of the diaphragm over the entire circumference, and the outer periphery of the annular flat portion is provided. The diameter was set to be equal to or greater than the outer diameter of the end face of the magnetic circuit facing the annular flat portion.

このように構成されたスピーカは、環形平坦部よりも径方向外側では振動板が磁気回路と干渉する虞がなくなるため、この環形平坦部とこれに対向する磁気回路の端面との間隔が振動板に許容される最大振幅量となる。したがって、スピーカの薄型化を損なうことなく、振動板に許容される最大振幅量を増大させることができて、音量を不所望に制約する必要がなくなる。また、最大振幅量を確保するために振動板のテーパ角度を大きくする必要もないので、高音域での振動板の動作特性も劣化しない。   The loudspeaker configured in this way has a possibility that the diaphragm does not interfere with the magnetic circuit on the outer side in the radial direction from the annular flat part. Therefore, the distance between the annular flat part and the end face of the magnetic circuit facing the diaphragm is the diaphragm. Is the maximum amount of amplitude allowed. Therefore, the maximum amplitude amount allowed for the diaphragm can be increased without impairing the thinning of the speaker, and it is not necessary to restrict the volume undesirably. Further, since it is not necessary to increase the taper angle of the diaphragm in order to ensure the maximum amplitude, the operating characteristics of the diaphragm in the high sound range are not deteriorated.

上記の構成において、ボビンの開口端を蓋閉する防塵キャップを備え、この防塵キャップの外周部の底面を振動板の環形平坦部に接着固定すれば、防塵キャップの接着面積を無理なく増大させることができるため好ましい。   In the above configuration, if the dustproof cap that closes the opening end of the bobbin is provided and the bottom surface of the outer periphery of the dustproof cap is bonded and fixed to the annular flat portion of the diaphragm, the adhesion area of the dustproof cap can be increased without difficulty. Is preferable.

また、上記の構成において、ダンパの内周部を環形平坦部に接着固定すれば、ダンパを振動板に対して面接着できるため、接着強度を高められると共に接着作業も容易となる。   Further, in the above configuration, if the inner peripheral portion of the damper is bonded and fixed to the ring-shaped flat portion, the damper can be surface bonded to the diaphragm, so that the bonding strength can be increased and the bonding work is facilitated.

実施例について図面を参照して説明すると、図１は本実施例に係るスピーカの断面図、図２は図１中の矢印Ｐ部を拡大して示す説明図である。   The embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the loudspeaker according to the present embodiment, and FIG. 2 is an explanatory view showing an enlarged arrow P portion in FIG.

図１に示すスピーカ２１は、磁気ギャップＧを有する磁気回路２２と、ボビン２３に巻装されて磁気ギャップＧ内に配置されたボイスコイル２４と、円錐状のコーン紙等からなりボビン２３の基端部に接着固定された振動板２５と、磁気回路２２に固定されて振動板２５の外周部を外周エッジ部２６を介して支持するフレーム２７と、このフレーム２７の外周部に固定されたカバー２８と、内周部がボビン２３の基端部に連結されて固定端側の外周部がカバー２８に取着されたダンパ２９と、ボビン２３に冠着された防塵キャップ３０とによって主に構成されており、振動板２５がボビン２３および磁気回路２２をスカート状に包囲しているため全体の高さ寸法が抑えられている。そして、振動板２５の内周部に全周に亘って平坦な環形平坦部２５ａが設けられており、この環形平坦部２５ａ上にダンパ２９の内周部や防塵キャップ３０の外周部が接着剤３４を用いて固定されている（図２参照）。本実施例では、ダンパ２９の内周部が環形平坦部２５ａと防塵キャップ３０との間に挟まれた状態で各部材が面接着されている。なお、環形平坦部２５ａの外径ｄ１は、磁気回路２２を構成している後述する円筒部３３ａの端面３３ｂの外径ｄ２と同等に設定されている。この磁気回路２２は、ポールピース３１と、径方向に沿って着磁されてポールピース３１の外周部に固定された円環状のマグネット３２と、マグネット３２を包囲する円筒部３３ａを有してポールピース３１を載置固定したヨーク３３とによって構成される内磁型であり、マグネット３２とヨーク３３の円筒部３３ａとの間に磁気ギャップＧが形成されている。ただし、磁気回路２２は外磁型であってもよい。   A speaker 21 shown in FIG. 1 includes a magnetic circuit 22 having a magnetic gap G, a voice coil 24 wound around a bobbin 23 and disposed in the magnetic gap G, a cone-shaped cone paper, and the like. A diaphragm 25 bonded and fixed to the end portion, a frame 27 fixed to the magnetic circuit 22 and supporting the outer peripheral portion of the diaphragm 25 via an outer peripheral edge portion 26, and a cover fixed to the outer peripheral portion of the frame 27 28, a damper 29 having an inner peripheral portion connected to a base end portion of the bobbin 23 and an outer peripheral portion on the fixed end side attached to the cover 28, and a dustproof cap 30 crowned on the bobbin 23. In addition, since the diaphragm 25 surrounds the bobbin 23 and the magnetic circuit 22 in a skirt shape, the overall height is suppressed. A flat annular flat portion 25a is provided on the inner peripheral portion of the diaphragm 25 over the entire circumference, and the inner peripheral portion of the damper 29 and the outer peripheral portion of the dustproof cap 30 are adhesives on the annular flat portion 25a. 34 (see FIG. 2). In this embodiment, each member is surface-bonded in a state where the inner peripheral portion of the damper 29 is sandwiched between the annular flat portion 25a and the dust cap 30. The outer diameter d1 of the annular flat portion 25a is set to be equal to the outer diameter d2 of an end surface 33b of a cylindrical portion 33a, which will be described later, constituting the magnetic circuit 22. The magnetic circuit 22 includes a pole piece 31, an annular magnet 32 that is magnetized along the radial direction and is fixed to the outer periphery of the pole piece 31, and a cylindrical portion 33 a that surrounds the magnet 32. It is an inner magnet type constituted by a yoke 33 on which the piece 31 is placed and fixed, and a magnetic gap G is formed between the magnet 32 and the cylindrical portion 33 a of the yoke 33. However, the magnetic circuit 22 may be an external magnet type.

このように構成されたスピーカ本体２１は、図示せぬリード線を介してボイスコイル２４に音声電流が通電されると、電磁力によりボイスコイル２４が振動するので、ボビン２３を介して振動板２５が駆動されて振動し、ラジオ音声や各種記録媒体の再生音声などの拡声が行えるようになっている。   The speaker body 21 configured in this manner vibrates the voice coil 24 by electromagnetic force when a voice current is applied to the voice coil 24 via a lead wire (not shown). Is driven to vibrate, so that radio sound and reproduced sound of various recording media can be amplified.

本実施例に係るスピーカ２１は、振動板２５の内周部に設けた環形平坦部２５ａの外径ｄ１が、この環形平坦部２５ａに対向している磁気回路２２の端面３３ｂの外径ｄ２と同等であることから、ボイスコイル２４に駆動されて振動板２５が大きく振動しても、振動板２５のうち環形平坦部２５ａよりも径方向外側の傾斜部分は磁気回路２２に当接する心配がない。つまり、このスピーカ２１においては、環形平坦部２５ａとこれに対向する磁気回路２２の端面３３ｂとの間隔Ｂが、振動板２５に許容される最大振幅量となっているため、装置全体の薄型化を損なうことなく最大振幅量を増大させることができ、音量を不所望に制約する必要がなくなる。また、最大振幅量を確保するために振動板２５のテーパ角度を大きくする必要もないので、高音域での振動板２５の動作特性（追従性）も劣化しない。しかも、振動板２５の内周部に環形平坦部２５ａが設けてあると、ダンパ２９の内周部や防塵キャップ３０の外周部を環形平坦部２５ａ上に載置して接着固定することができるため、ダンパ２９や防塵キャップ３０の接着面積が無理なく増大でき、組立性や信頼性が向上するという利点もある。   In the speaker 21 according to the present embodiment, the outer diameter d1 of the annular flat portion 25a provided on the inner peripheral portion of the diaphragm 25 is equal to the outer diameter d2 of the end surface 33b of the magnetic circuit 22 facing the annular flat portion 25a. Therefore, even if the vibration plate 25 is vibrated greatly by being driven by the voice coil 24, there is no fear that the inclined portion of the vibration plate 25 on the outer side in the radial direction with respect to the annular flat portion 25a contacts the magnetic circuit 22. . That is, in the speaker 21, the distance B between the ring-shaped flat portion 25a and the end surface 33b of the magnetic circuit 22 opposed thereto is the maximum amount of amplitude allowed for the diaphragm 25. The maximum amplitude can be increased without impairing the sound volume, and it is not necessary to restrict the volume undesirably. Further, since it is not necessary to increase the taper angle of the diaphragm 25 in order to ensure the maximum amplitude, the operating characteristics (following performance) of the diaphragm 25 in the high sound range are not deteriorated. Moreover, if the annular flat portion 25a is provided on the inner peripheral portion of the diaphragm 25, the inner peripheral portion of the damper 29 and the outer peripheral portion of the dust cap 30 can be placed on the annular flat portion 25a and bonded and fixed. Therefore, the bonding area of the damper 29 and the dustproof cap 30 can be increased without difficulty, and there is an advantage that the assembling property and the reliability are improved.

なお、振動板２５の環形平坦部２５ａを磁気回路２２の端面３３ｂよりも大径に設定しておいてもよいが、環形平坦部２５ａが大きすぎると高音域での振動板２５の動作特性に悪影響が及ぶ虞があるので、環形平坦部２５ａの外径は端面３３ｂの外径と同等か若干大きい程度が好ましい。   The ring-shaped flat portion 25a of the diaphragm 25 may be set to have a larger diameter than the end face 33b of the magnetic circuit 22, but if the ring-shaped flat portion 25a is too large, the operating characteristics of the diaphragm 25 in the high sound range will be increased. Since an adverse effect may occur, the outer diameter of the annular flat portion 25a is preferably equal to or slightly larger than the outer diameter of the end face 33b.

本発明の実施例に係るスピーカの断面図である。It is sectional drawing of the speaker which concerns on the Example of this invention. 図１中の矢印Ｐ部を拡大して示す説明図Explanatory drawing which expands and shows the arrow P part in FIG. 従来例に係るスピーカの断面図である。It is sectional drawing of the speaker which concerns on a prior art example.

符号の説明Explanation of symbols

２１ スピーカ
２２ 磁気回路
２３ ボビン
２４ ボイスコイル
２５ 振動板
２５ａ 環形平坦部
２６ 外周エッジ部
２７ フレーム
２８ カバー
２９ ダンパ
３０ 防塵キャップ
３１ ポールピース
３２ マグネット
３３ ヨーク
３３ｂ 端面
３４ 接着剤
Ｇ 磁気ギャップ
DESCRIPTION OF SYMBOLS 21 Speaker 22 Magnetic circuit 23 Bobbin 24 Voice coil 25 Diaphragm 25a Ring-shaped flat part 26 Outer peripheral edge part 27 Frame 28 Cover 29 Damper 30 Dust-proof cap 31 Pole piece 32 Magnet 33 Yoke 33b End face 34 Adhesive G Magnetic gap

Claims (3)

ボビンに巻装されたボイスコイルと、該ボイスコイルが配置される磁気ギャップを有する磁気回路と、内周部を前記ボビンに連結して該ボビンを包囲する振動板と、前記磁気回路に固定されて前記振動板の外周部を外周エッジ部を介して支持するフレームと、前記振動板に対し前記磁気回路とは逆側に配置されて該振動板の内周部を支持するダンパとを備え、前記ボイスコイルへ通電することによって前記振動板が駆動されるスピーカにおいて、
前記振動板の内周部にその全周に亘って平坦な環形平坦部を設け、この環形平坦部の外径を、前記磁気回路のうち該環形平坦部に対向する側の端面の外径と同等またはそれ以上に設定したことを特徴とするスピーカ。 A voice coil wound around a bobbin, a magnetic circuit having a magnetic gap in which the voice coil is disposed, a diaphragm surrounding an inner periphery of the bobbin and surrounding the bobbin, and fixed to the magnetic circuit A frame that supports the outer peripheral part of the diaphragm via an outer peripheral edge part, and a damper that is disposed on the opposite side of the magnetic circuit with respect to the diaphragm and supports the inner peripheral part of the diaphragm, In the speaker in which the diaphragm is driven by energizing the voice coil,
A flat annular flat portion is provided on the inner peripheral portion of the diaphragm over the entire circumference, and the outer diameter of the annular flat portion is defined as the outer diameter of the end face of the magnetic circuit facing the annular flat portion. A speaker characterized by being set to be equal or higher. 請求項１の記載において、前記ボビンの開口端を蓋閉する防塵キャップを備え、該防塵キャップの外周部の底面を前記環形平坦部に接着固定したことを特徴とするスピーカ。   2. The speaker according to claim 1, further comprising a dustproof cap that closes the opening end of the bobbin, and a bottom surface of an outer peripheral portion of the dustproof cap is bonded and fixed to the annular flat portion. 請求項１または２の記載において、前記ダンパの内周部を前記環形平坦部に接着固定したことを特徴とするスピーカ。
3. The speaker according to claim 1, wherein an inner peripheral portion of the damper is bonded and fixed to the annular flat portion.
JP2003387934A 2003-11-18 2003-11-18 Speaker Withdrawn JP2005151318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003387934A JP2005151318A (en) 2003-11-18 2003-11-18 Speaker

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JP2003387934A JP2005151318A (en) 2003-11-18 2003-11-18 Speaker

Publications (1)

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JP2005151318A true JP2005151318A (en) 2005-06-09

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JP2003387934A Withdrawn JP2005151318A (en) 2003-11-18 2003-11-18 Speaker

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101363512B1 (en) 2012-12-14 2014-02-14 주식회사 비에스이 Micro speaker
KR101481649B1 (en) * 2013-07-10 2015-01-12 주식회사 이엠텍 Microspeaker
CN105764012A (en) * 2014-09-19 2016-07-13 美特科技(苏州)有限公司 Vibrating diaphragm dangling edge structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101363512B1 (en) 2012-12-14 2014-02-14 주식회사 비에스이 Micro speaker
KR101481649B1 (en) * 2013-07-10 2015-01-12 주식회사 이엠텍 Microspeaker
CN105764012A (en) * 2014-09-19 2016-07-13 美特科技(苏州)有限公司 Vibrating diaphragm dangling edge structure

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