WO2022000530A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2022000530A1
WO2022000530A1 PCT/CN2020/101215 CN2020101215W WO2022000530A1 WO 2022000530 A1 WO2022000530 A1 WO 2022000530A1 CN 2020101215 W CN2020101215 W CN 2020101215W WO 2022000530 A1 WO2022000530 A1 WO 2022000530A1
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WO
WIPO (PCT)
Prior art keywords
dome
aluminum foil
loudspeaker
foil layer
hole
Prior art date
Application number
PCT/CN2020/101215
Other languages
English (en)
French (fr)
Inventor
曾健
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022000530A1 publication Critical patent/WO2022000530A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present application relates to the field of loudspeakers, in particular to a loudspeaker.
  • the loudspeaker will provide a uniform magnetic field through the magnetic steel, so that the voice coil with alternating current will vibrate in the uniform magnetic field, and the voice coil will drive the diaphragm to vibrate to make the loudspeaker produce sound.
  • the diaphragm can be formed by the cooperation of the folding ring and the dome.
  • the loudspeaker includes stacked aluminum foil layers and foam layers.
  • the foam as a foam structure with many pores, will generate heat when the loudspeaker is working.
  • the foam and the air in the pores will expand when heated, while the surface of the aluminum foil layer of the conventional dome is a flat surface, and the expanded air cannot be discharged in time, which will cause the foam to deform and warp, and then cause the dome ring to separate, affecting the Product pure tone and reliability. Therefore, it is necessary to provide a speaker.
  • the purpose of the present application is to provide a loudspeaker, which can timely discharge the air expanded when the loudspeaker is working by opening a through hole on the dome, so as to avoid large deformation of the dome.
  • a loudspeaker the loudspeaker includes a casing with a receiving space, a magnetic circuit system and a vibration system contained in the receiving space, and the vibration system includes a A vibrating membrane, the vibrating membrane includes a folded ring connected to the casing and a dome connected to the folded ring, characterized in that the dome is provided with a through hole, and the dome includes a stacking the first aluminum foil layer and the foam layer, and the through hole runs through the first aluminum foil layer and the foam layer.
  • the dome further includes a second aluminum foil layer, and the foam layer is sandwiched between the first aluminum foil layer and the second aluminum foil layer.
  • the second aluminum foil layer is closer to the magnetic circuit system than the first aluminum foil layer.
  • the through hole penetrates through the first aluminum foil layer, the foam layer and the second aluminum foil layer.
  • the through hole includes one of a circle, a rectangle and a triangle.
  • the through holes are uniformly arranged on the dome in the form of a through hole array, and the through hole array includes one of a regular hexagon, a parallelogram, a triangle and a circle.
  • the folded ring is provided with a hollow structure
  • the dome cover is arranged on the hollow structure and fixed on the folded ring.
  • the casing includes a basin frame for fixing the magnetic circuit system and the vibration system, and an upper cover connected with the basin frame cover to form a receiving space, the diaphragm and the upper cover form a front cavity, and the The upper cover is provided with an opening communicating with the front cavity.
  • the beneficial effects of the present application are: to provide a loudspeaker, the loudspeaker includes a casing with a receiving space, a magnetic circuit system and a vibration system contained in the receiving space, and the vibration system includes a magnetic circuit system and a vibration system held in the casing
  • the diaphragm includes a fold ring connected to the casing and a dome connected to the fold ring, the dome is provided with a through hole, and the dome includes a stacked first An aluminum foil layer and a foam layer, and the through hole penetrates the first aluminum foil layer and the foam layer.
  • FIG. 1 is a schematic structural diagram of a dome of an embodiment of the application.
  • Fig. 2 is an exploded view of the dome of Fig. 1;
  • FIG. 3 is a schematic diagram of a first structure of a through hole array in a dome of an embodiment of the present application
  • FIG. 4 is a schematic diagram of a second structure of the through hole array in the dome of the embodiment of the present application.
  • FIG. 5 is a schematic diagram of another shape of a through hole in the through hole array of FIG. 3;
  • FIG. 6 is a schematic structural diagram of a speaker according to an embodiment of the present application.
  • FIG. 7 is a cross-sectional view of the speaker along the A-A direction in FIG. 6;
  • FIG. 8 is an exploded view of the loudspeaker of FIG. 6 .
  • dome 100 dome 100; first aluminum foil layer M; foam layer N; second aluminum foil layer Q; through-hole array 110; through-hole 120; speaker 200; Limiting part 112; First limiting part 112a; Second limiting part 112b; Holding part 113; Upper cover 12; Opening 121; Magnetic circuit system 2; Magnetic yoke 21; Bottom wall 211; Side wall 212; Main magnet Component 22 ; secondary magnetic steel component 23 ; vibration system 3 ; diaphragm 31 ; folding ring 311 ;
  • FIGS. 1 and 2 are the dome 100 provided by the application.
  • the dome 100 is provided with a through hole 120 , and the dome 100 is a flat plate structure.
  • the dome 100 may include a stacked first aluminum foil layer M and a foam layer N, and the through hole 120 penetrates the first aluminum foil layer M and the foam layer N.
  • the dome 100 may also include a first aluminum foil layer M, a second aluminum foil layer Q, and a foam layer N sandwiched between the first aluminum foil layer M and the second aluminum foil layer Q.
  • the through hole 120 penetrates through the first aluminum foil layer M, the foam layer N and the second aluminum foil layer Q.
  • the dome 100 includes a first aluminum foil layer M, a second aluminum foil layer Q, and a foam layer N sandwiched between the first aluminum foil layer M and the second aluminum foil layer Q, and the second aluminum foil layer Q is closer to the magnetic circuit system 2 than the first aluminum foil layer M is.
  • the shape of the through hole 120 includes one of circular, rectangular and triangular shapes.
  • a plurality of through holes 120 are evenly arranged on the dome 100 in the form of through hole arrays 110 , and the number of through hole arrays 110 may be multiple, for example, four through hole arrays 110 are provided in this embodiment.
  • the through holes 120 can be evenly distributed, so as to prevent local gas from being unable to be discharged, resulting in local expansion of the dome 100 .
  • the shape of the through hole array 110 is one of a regular hexagon, a parallelogram, a triangle and a circle, wherein the parallelogram is preferably a rectangle, which is beneficial to the preparation of the through holes 120 .
  • the size, shape, position, number, etc. of the through holes 120 are not limited to the structures shown in the drawings, and can be adjusted according to actual conditions.
  • the through hole 120 may also include multiple shapes at the same time, which will not be described in detail here.
  • the present application provides a loudspeaker 200
  • the loudspeaker 200 includes a housing 1 having an accommodation space, a magnetic circuit system 2 and a vibration system 3 accommodated in the accommodation space, and the magnetic circuit system 2 drives the vibration system 3 Vibration
  • the vibration system 3 includes a diaphragm 31 fixed on the casing 1
  • the diaphragm 31 includes a fold ring 311 connected to the casing 1 and a dome 100 connected to the fold ring 311
  • the dome 100 includes the ball described above.
  • Top 100 structure is a housing 1 having an accommodation space, a magnetic circuit system 2 and a vibration system 3 accommodated in the accommodation space, and the magnetic circuit system 2 drives the vibration system 3 Vibration
  • the vibration system 3 includes a diaphragm 31 fixed on the casing 1
  • the diaphragm 31 includes a fold ring 311 connected to the casing 1 and a dome 100 connected to the fold ring 311
  • the dome 100 includes the ball described above.
  • the loudspeaker 200 of the embodiment of the present application by disposing a plurality of through holes 120 on the dome 100, when the loudspeaker 200 generates heat during operation, the expanding gas that causes the foam and the air in the pores can be discharged from the through holes 120, avoiding the need for The dome 100 is greatly deformed, thereby improving the pure sound and reliability of the product, and increasing the service life of the speaker 200 .
  • the folding ring 311 is provided with a hollow structure 3114 , and the dome 100 is covered on the hollow structure 3114 and fixed on the folding ring 311 .
  • the housing 1 includes a basin frame 11 surrounding a circumference and an upper cover 12 abutting against one side of the basin frame 11 to form a receiving space, and the diaphragm 31 is sandwiched between between the basin frame 11 and the upper cover 12 .
  • the basin frame 11 includes a frame-shaped body 111 surrounding a circumference and a limiting portion 112 extending from the inner periphery of the frame-shaped body 111 away from the upper cover 12 to the center.
  • the limiting portion 112 is arranged around the inner periphery of the frame-shaped body 111. It includes a first limiting portion 112a along the long side and a second limiting portion 112b along the short side.
  • the upper cover 12 and the diaphragm 31 are surrounded to form a front cavity.
  • the center of the upper cover 12 is provided with a plurality of openings 121 . In this embodiment, three openings 121 are provided.
  • the magnetic circuit system 2 includes a magnetic yoke 21 disposed opposite the upper cover 12 and abutting with the limiting portion 112 , and a magnetic steel disposed on the magnetic yoke 21 components.
  • the magnetic steel component includes a main magnetic steel component 22 and a secondary magnetic steel component 23.
  • the secondary magnetic steel component 23 is provided on the corresponding two sides of the main magnetic steel component 22 and abuts against the first limiting portion 112a.
  • the secondary magnetic steel component 23 and A magnetic gap is formed between the main magnet steel assemblies 22 .
  • the secondary magnetic steel assemblies 23 may be integrally formed around the main magnetic steel assembly 22 , or may be arranged in two groups opposite to the main magnetic steel assembly 22 , or may be arranged in four groups at intervals outside the main magnetic steel assembly 22 . .
  • the yoke 21 includes a bottom wall 211 and side walls 212 extending upward from the two opposite edges of the bottom wall 211 to the upper cover 12 , the side walls 212 are in contact with the limiting portion 112 , and the other opposite sides of the bottom wall 211 are respectively provided with secondary magnetic steel components 23 , the secondary magnetic steel assembly 23 is in contact with the limiting portion 112 .
  • the vibration system 3 further includes a voice coil 32 surrounding the main magnet steel assembly 22 and disposed in the magnetic gap, the voice coil 32 being away from the yoke 21 and the diaphragm. 31 connected.
  • the folding ring 311 includes a first fixing portion 3111 sandwiched between the basin frame 11 and the upper cover 12 , and sandwiched between the dome 100 and the voice coil 32 .
  • the speaker 200 further includes two conductive terminals 4 electrically connected with the voice coil 32 , and the side of the basin frame 11 close to the upper cover 12 extends away from the magnetic circuit system 2 A holding portion 113 is formed, and two conductive terminals 4 are disposed on the holding portion 113 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

本申请提供了一种扬声器，所述扬声器包括具有收容空间的壳体，收容于所述收容空间内的磁路系统和振动系统，所述振动系统包括固持于所述壳体上的振膜，所述振膜包括与所述壳体相连的折环以及与所述折环相连的球顶，所述球顶设有贯穿的通孔，所述球顶包括叠设的第一铝箔层和泡棉层，所述通孔贯穿所述第一铝箔层和泡棉层。在扬声器工作发热时，引起泡棉及孔隙中空气的膨胀气体会从这些通孔处排出，避免球顶发生较大变形，从而改善产品纯音及可靠性，提升扬声器的使用寿命。

Description

扬声器 技术领域
本申请涉及扬声器领域，具体涉及一种扬声器。
 背景技术
随着科技的发展，越来越多的电子设备都内置有扬声器。一般的，扬声器会通过磁钢提供匀强磁场，使通有交变电流的音圈在匀强磁场中振动，音圈带动振膜振动而使扬声器产生声音。
振膜可以由折环和球顶配合形成，现有技术中扬声器包括叠设的铝箔层和泡棉层，其中，泡棉作为一种孔隙较多的发泡结构，在扬声器工作时会发热，泡棉及孔隙中空气遇热会膨胀，而常规球顶的铝箔层表面是平整的平面，膨胀的空气无法及时排出，会引起泡棉变形和翘曲，进而会引起球顶折环分离，影响产品纯音及可靠性。因此，有必要提供一种扬声器。
 技术问题
本申请的目的在于提供一种扬声器，通过在球顶上开设贯通的通孔，以及时排出扬声器工作时膨胀的空气，避免球顶发生较大变形。
 技术解决方案
本申请的技术方案如下：一种扬声器，所述扬声器包括具有收容空间的壳体，收容于所述收容空间内的磁路系统和振动系统，所述振动系统包括固持于所述壳体上的振膜，所述振膜包括与所述壳体相连的折环以及与所述折环相连的球顶，其特征在于，所述球顶设有贯穿的通孔，所述球顶包括叠设的第一铝箔层和泡棉层，所述通孔贯穿所述第一铝箔层和泡棉层。
优选的，所述球顶还包括第二铝箔层，所述泡棉层夹设于所述第一铝箔层和所述第二铝箔层之间。
优选的，所述第二铝箔层比所述第一铝箔层更靠近所述磁路系统。
优选的，所述通孔贯穿所述第一铝箔层、泡棉层以及第二铝箔层。
优选的，所述通孔包括圆形、矩形和三角形中的一种。
优选的，所述通孔以通孔阵列的形式均匀排布于所述球顶，所述通孔阵列包括正六边形、平行四边形、三角形和圆形中的一种。
优选的，所述折环设有中空结构，所述球顶盖设于所述中空结构并固定在所述折环上。
优选的，所述壳体包括固定所述磁路系统和振动系统的盆架以及与所述盆架盖接形成收容空间的上盖，所述振膜和所述上盖形成前腔，所述上盖设有与所述前腔连通的开口。
 有益效果
本申请的有益效果在于：提供了一种扬声器，所述扬声器包括具有收容空间的壳体，收容于所述收容空间内的磁路系统和振动系统，所述振动系统包括固持于所述壳体上的振膜，所述振膜包括与所述壳体相连的折环以及与所述折环相连的球顶，所述球顶设有贯穿的通孔，所述球顶包括叠设的第一铝箔层和泡棉层，所述通孔贯穿所述第一铝箔层和泡棉层。在扬声器工作发热时，引起泡棉及孔隙中空气的膨胀气体会从这些通孔处排出，避免球顶发生较大变形，从而改善产品纯音及可靠性，提升扬声器的使用寿命。
 附图说明
图1为本申请实施例球顶的结构示意图；
图2为图1球顶的分解图；
图3为本申请实施例球顶中通孔阵列的第一结构示意图；
图4为本申请实施例球顶中通孔阵列的第二结构示意图；
图5为图3通孔阵列中通孔的另一形状示意图；
图6为本申请实施例扬声器的结构示意图；
图7为图6中扬声器沿A-A向的剖视图；
图8为图6中扬声器的分解图。
附图说明：球顶100；第一铝箔层M；泡棉层N；第二铝箔层Q；通孔阵列110；通孔120；扬声器200；壳体1；盆架11；框形主体111；限位部112；第一限位部112a；第二限位部112b；固持部113；上盖12；开口121；磁路系统2；磁轭21；底壁211；侧壁212；主磁钢组件22；副磁钢组件23；振动系统3；振膜31；折环311；第一固定部3111；第二固定部3112；中间部3113；中空结构3114；音圈32；导电端子4。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
请参阅图1-图5，图1和图2为本申请提供的球顶100，球顶100开设有贯穿的通孔120，球顶100为平板结构。可选的，球顶100可以包括叠设的第一铝箔层M和泡棉层N，通孔120贯穿第一铝箔层M和泡棉层N。球顶100也可以包括第一铝箔层M、第二铝箔层Q和夹设于第一铝箔层M和第二铝箔层Q之间的泡棉层N。优选的，通孔120贯穿第一铝箔层M、泡棉层N以及第二铝箔层Q。在本申请的实施例中，球顶100包括第一铝箔层M、第二铝箔层Q以及夹设于第一铝箔层M和第二铝箔层Q之间的泡棉层N，第二铝箔层Q比第一铝箔层M更靠近磁路系统2。优选的，通孔120的形状包括圆形、矩形和三角形等形状中的一种。可选的，若干通孔120以通孔阵列110的形式均匀排布在球顶100上，通孔阵列110的数量可以为多个，例如在本实施例中设有4个通孔阵列110。通过设置均匀分布的通孔阵列110，可以使通孔120均匀分布，避免局部气体无法排出，导致球顶100出现局部膨胀。优选的，通孔阵列110的形状为正六边形、平行四边形、三角形和圆形等形状中的一种，其中平行四边形优选矩形，有利于通孔120的制备。通孔120的大小、形状、位置、数量等不限于图示结构，可根据实际情况进行调整。此外，通孔120也可以同时包含多种形状，在此不再详述。
请参阅图6-图8，本申请提供了一种扬声器200，扬声器200包括具有收容空间的壳体1，收容于收容空间内的磁路系统2和振动系统3，磁路系统2驱动振动系统3振动，振动系统3包括固持于壳体1上的振膜31，振膜31包括与壳体1相连的折环311以及与折环311相连的球顶100，球顶100包括前文记载的球顶100结构。
本申请实施例的扬声器200，通过在球顶100上设置若干贯通的通孔120，能够在扬声器200工作发热时，使引起泡棉及孔隙中空气的膨胀气体从这些通孔处120排出，避免球顶100发生较大变形，从而改善产品纯音及可靠性，提升扬声器200的使用寿命。
在一个可选的实施例中，请参阅图8，折环311设有中空结构3114，球顶100盖设于中空结构3114并固定在折环311上。
在一个可选的实施例中，请参阅图5-图7，壳体1包括围设一周的盆架11以及与盆架11一侧抵接形成收容空间的上盖12，振膜31夹设于盆架11和上盖12之间。盆架11包括围设一周的框形主体111和自框形主体111远离上盖12的内周缘向中央延伸的限位部112，限位部112围设于框形主体111的内周缘一周，包括沿长边设置的第一限位部112a和沿短边的第二限位部112b。上盖12和振膜31围设形成前腔，上盖12的中央开设有若干开口121，开口121连通外部和前腔，有利于球顶100中膨胀的气体从前腔通过开口121排出。在本实施例中设有三个开口121。
在一个可选的实施例中，请参阅图7和图8，磁路系统2包括与上盖12相对设置且与限位部112抵接的磁轭21、设于磁轭21上的磁钢组件。磁钢组件包括主磁钢组件22和副磁钢组件23，副磁钢组件23设于主磁钢组件22相对应的两侧且与第一限位部112a抵接，副磁钢组件23和主磁钢组件22之间形成磁间隙。可选的，副磁钢组件23可以为一体成型环绕主磁钢组件22，也可以为2组相对设置于主磁钢组件22外，还可以为4组间隔围设于主磁钢组件22外。本实施例中，设有两组相对的副磁钢组件23，设置在主磁钢组件22相对的两边外。磁轭21包括底壁211和自底壁211相对的两边缘向上盖12延伸的侧壁212，侧壁212与限位部112抵接，底壁211另外相对的两边分别设有副磁钢组件23，副磁钢组件23与限位部112抵接。
在一个可选的实施例中，请参阅图7和图8，振动系统3还包括环绕主磁钢组件22且设于磁间隙的音圈32，音圈32远离磁轭21一侧与振膜31相连。
在一个可选的实施例中，请参阅图7和图8，折环311包括夹设于盆架11和上盖12之间的第一固定部3111、夹设于球顶100和音圈32之间的第二固定部3112以及连接第一固定部3111和第二固定部3112之间中间部3113，中间部3113朝向上盖12凸出，且第二固定部3112围设一周使得折环311形成中空结构3114。
在一个可选的实施例中，请参阅图7和图8，扬声器200还包括与音圈32电连接的两个导电端子4，盆架11靠近上盖12一侧向背离磁路系统2延伸形成固持部113，两个导电端子4设于固持部113。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (8)

1、一种扬声器，所述扬声器包括具有收容空间的壳体，收容于所述收容空间内的磁路系统和振动系统，所述振动系统包括固持于所述壳体上的振膜，所述振膜包括与所述壳体相连的折环以及与所述折环相连的球顶，其特征在于，所述球顶设有贯穿的通孔，所述球顶包括叠设的第一铝箔层和泡棉层，所述通孔贯穿所述第一铝箔层和泡棉层。
2、如权利要求1所述扬声器，其特征在于，所述球顶还包括第二铝箔层，所述泡棉层夹设于所述第一铝箔层和所述第二铝箔层之间。
3、如权利要求2所述扬声器，其特征在于，所述第二铝箔层比所述第一铝箔层更靠近所述磁路系统。
4、如权利要求3所述扬声器，其特征在于，所述通孔贯穿所述第一铝箔层、泡棉层以及第二铝箔层。
5、如权利要求1-4任一项所述扬声器，其特征在于，所述通孔包括圆形、矩形和三角形中的一种。
6、如权利要求5所述扬声器，其特征在于，所述通孔以通孔阵列的形式均匀排布于所述球顶，所述通孔阵列包括正六边形、平行四边形、三角形和圆形中的一种。
7、如权利要求1所述扬声器，其特征在于，所述折环设有中空结构，所述球顶盖设于所述中空结构并固定在所述折环上。
8、如权利要求1所述扬声器，其特征在于，所述壳体包括固定所述磁路系统和振动系统的盆架以及与所述盆架盖接形成收容空间的上盖，所述振膜和所述上盖形成前腔，所述上盖设有与所述前腔连通的开口。
PCT/CN2020/101215 2020-06-30 2020-07-10 扬声器 WO2022000530A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
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EP1484941A1 (en) * 2003-06-04 2004-12-08 Harman/Becker Automotive Systems GmbH Loudspeaker
CN205987363U (zh) * 2016-08-26 2017-02-22 深圳市音沃仕科技有限公司 电声换能器
CN108430015A (zh) * 2018-03-28 2018-08-21 努比亚技术有限公司 一种扬声结构及扬声器和听筒
CN208462050U (zh) * 2018-06-22 2019-02-01 信利光电股份有限公司 一种扬声器振膜及扬声器
CN208638635U (zh) * 2018-08-05 2019-03-22 瑞声科技(新加坡)有限公司 扬声器
CN208798212U (zh) * 2018-08-29 2019-04-26 瑞声科技(新加坡)有限公司 扬声器

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Publication number Priority date Publication date Assignee Title
EP1484941A1 (en) * 2003-06-04 2004-12-08 Harman/Becker Automotive Systems GmbH Loudspeaker
CN205987363U (zh) * 2016-08-26 2017-02-22 深圳市音沃仕科技有限公司 电声换能器
CN108430015A (zh) * 2018-03-28 2018-08-21 努比亚技术有限公司 一种扬声结构及扬声器和听筒
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