WO2020140181A1 - 扬声器 - Google Patents

扬声器 Download PDF

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Publication number
WO2020140181A1
WO2020140181A1 PCT/CN2018/125962 CN2018125962W WO2020140181A1 WO 2020140181 A1 WO2020140181 A1 WO 2020140181A1 CN 2018125962 W CN2018125962 W CN 2018125962W WO 2020140181 A1 WO2020140181 A1 WO 2020140181A1
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WO
WIPO (PCT)
Prior art keywords
dome
groove
diaphragm
sides
speaker
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PCT/CN2018/125962
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English (en)
French (fr)
Inventor
章统
Original Assignee
瑞声声学科技(深圳)有限公司
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Publication date
Application filed by 瑞声声学科技(深圳)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2018/125962 priority Critical patent/WO2020140181A1/zh
Publication of WO2020140181A1 publication Critical patent/WO2020140181A1/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
    • 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 invention relates to the technical field of acoustic equipment, in particular to a speaker.
  • the diaphragm used in the speaker of the prior art drives the air to vibrate in order to obtain the vibration effect to obtain a more significant volume and sound quality effect.
  • the elastic deformation action formed by the curved curved surface formed by the folded ring portion enhances the vibration action of the diaphragm.
  • the purpose of the present invention is to provide a loudspeaker, which aims to solve the problem that the voice coil in the prior art can hardly support the dome of the diaphragm during the working process, and the dome will produce split vibration due to insufficient strength. , Thereby affecting the high frequency sensitivity of the product.
  • the speaker of this embodiment includes a basin frame and a vibration system respectively fixed to the basin frame and a magnetic circuit system with a magnetic gap.
  • the vibration system includes a diaphragm fixed to the basin frame and inserted into the magnetic gap to drive the diaphragm to vibrate and sound Voice coil
  • the diaphragm includes a folding ring fixed to the basin frame and a first dome stacked in the middle of the folding ring
  • the diaphragm also includes a second dome disposed between the folding ring and the first dome, the first The surface of the dome close to the folding ring is the first surface.
  • the first dome is provided with a groove recessed from the first surface away from the folding ring, and the second dome is disposed in the groove.
  • a groove is formed in the middle area of the first dome, and the second dome is embedded in the middle position of the groove.
  • both the first dome and the second dome are rectangular plates.
  • the first dome includes two opposite long sides.
  • the groove passes through the two long sides of the first dome of the rectangular plate.
  • the second The dome includes two first side edges arranged oppositely and two opposite second side edges connecting the first side edges, the two first side edges are in contact with the groove walls on both sides of the groove, and the two second side edges The sides are respectively flush with the two long sides of the first dome of the rectangular plate.
  • the surface of the second dome close to the folding ring is a second surface, and the second surface is flush with the first surface.
  • the folding ring includes a first fixing portion fixed to the basin holder, a folding ring portion extending from an end of the first fixing portion near the inside of the folding ring toward the inside of the folding ring, and a first extending portion extending from the folding ring portion into the inside of the folding ring
  • Two fixing portions, the surface of the second fixing portion away from the magnetic circuit system is a third surface, and the first dome is fixed to the third surface.
  • the first surface is adhesively fixed to the third surface.
  • the folded ring portion is an arc-shaped recess recessed from the third surface in a direction closer to the magnetic circuit system.
  • the magnetic circuit system includes a yoke, a main magnetic steel fixed on the yoke, and auxiliary magnetic steels which are respectively spaced on opposite sides of the main magnetic steel and form a magnetic gap with the main magnetic steel.
  • the secondary magnetic steel includes two, and the magnetic circuit system further includes a primary pole core stacked on the primary magnetic steel and two secondary pole cores stacked on the secondary magnetic steel.
  • the voice coil drives the diaphragm to vibrate under the combined effect of the changing current and the magnetic circuit system, so that the air near the diaphragm vibrates and sounds.
  • the vibration of the diaphragm By providing a groove that is recessed from the first surface away from the fold ring on the first dome, and adding a second dome matching the shape of the groove in the groove, the dome structure of the entire speaker is enhanced, To achieve the effect of suppressing the split vibration generated on the dome of the speaker at high frequencies, improve the high-frequency performance of the speaker, improve the overall sound quality of the speaker, and reduce the resonance frequency of the dome of the speaker.
  • FIG. 1 is a first exploded view of the speaker of the present invention
  • FIG. 2 is an enlarged view at A in FIG. 1;
  • FIG. 3 is a second exploded view of the speaker of the present invention.
  • FIG. 4 is a perspective view of the speaker of the present invention after assembly
  • FIG. 5 is a cross-sectional view of FIG. 4 along the B-B direction.
  • the speaker provided by the embodiment of the present invention includes a basin holder 10 and a vibration system 40 and a magnetic circuit system 30 respectively fixed to the basin holder 10.
  • the magnetic circuit system 30 includes a yoke 31, a main magnetic steel 32 fixed on the yoke 31, and auxiliary magnetic steels 33 that are spaced apart on opposite sides of the main magnetic steel 32 and form a magnetic gap 36 with the main magnetic steel 32.
  • the vibration system 40 includes a diaphragm 41 fixed to the basin frame 10 and a voice coil 43 inserted into the magnetic gap 36 to drive the diaphragm 41 to vibrate and sound.
  • the diaphragm 41 includes a folding ring 411 fixed to the basin frame 10 and stacked on the folding frame
  • the first dome 412 in the middle of the ring 411, the diaphragm 41 further includes a second dome 413 disposed between the folding ring 411 and the first dome 412, the surface of the first dome 412 near the folding ring 411 is the first surface 4122, the first dome 412 is provided with a groove 4120 recessed away from the first surface 4122 away from the folding ring 411, and the second dome 413 is disposed in the groove 4120.
  • the voice coil 43 drives the diaphragm 41 to vibrate under the combined action of the changing current and the magnetic circuit system 30, so that the air near the diaphragm 41 vibrates and sounds.
  • 41 During the vibration process, by adding a second dome 413 and assembling the second dome 413 with the first dome 412 to synergize, the strength of the entire dome of the speaker is enhanced, and the ball of the speaker is suppressed at high frequencies
  • the split vibration generated on the top improves the high-frequency performance of the speaker, improves the overall sound quality of the speaker, and reduces the resonance frequency of the dome of the speaker.
  • a groove 4120 is provided in the middle area of the first dome 412, and the second dome 413 is embedded in the middle of the groove 4120.
  • a vibration system with only one flat-shaped dome is used.
  • the divided vibration generated by the dome is affected by the voice coil 43, which makes the middle region of the dome prone to resonance phenomenon, which in turn affects
  • the vibration of the diaphragm 41 affects the sound quality of the speaker.
  • the technology of the present invention sets the second dome 413 in the middle area of the first dome 412 to adjust the resonance frequency of the middle area of the first dome 412 Purpose, and the second dome 413 enhances the self-strength of the middle area of the first dome 412, thereby suppressing the split vibration phenomenon that occurs during the sounding of the speaker.
  • the second dome 413 is a rectangular plate
  • the first dome 412 includes two opposed long sides 4123
  • the groove 4120 passes through the two long sides of the first dome 412
  • the side 4123, the second dome 413 includes two first sides 4131 opposite to each other and two second sides 4132 connecting the two first sides 4131 and opposite each other, the two first sides 4131 are respectively
  • the groove walls 4121 on both sides of the groove 4120 are in contact with each other, and the two second sides 4132 are respectively flush with the two long sides 4123 of the first dome 412, that is, the size of the second dome 413 is concave
  • the length and width dimensions of the groove 4120 are equivalent (in fact, the area of the plate surface of the second dome 413 may be slightly smaller than the area of the groove bottom of the groove 4120).
  • the two first sides 4131 of the second dome 413 are respectively in contact with the groove walls 4121 on both sides of the groove 4120
  • the contact operation can realize the positioning operation during the assembly process, and the second dome 413 can be correctly placed in the groove 4120 without additional positioning operation.
  • the assembly process is convenient and fast.
  • the first surface 4122 is fixed on the third surface 4110 by liquid adhesive, which is convenient and fast, and the manufacturing and processing steps are low in cost.
  • the surface of the second dome 413 near the folding ring 411 is the second surface 4133.
  • the second surface 4133 is flush with the first surface 4122, so that After the addition of the second dome 413, the thickness of the overall dome does not increase, and at the same time, it facilitates the bonding between the first dome 413 and the folding ring 411.
  • the utility model does not affect the thickness of the overall dome and avoids the problem that the overall size of the speaker is increased after the assembly is completed, and optimizes the overall sound quality of the speaker. At the same time, the optimization of the overall size of the speaker is also maintained.
  • the folding ring 411 includes a first fixing portion 4111 fixed to the basin frame 10, a folding ring portion 4112 extending from an end of the first fixing portion 4111 near the inside of the folding ring 411 into the inside of the folding ring 411, and a self-folding
  • the second fixing portion 4113 of the ring portion 4112 extending toward the inside of the folding ring 411, the surface of the second fixing portion 4113 away from the magnetic circuit system 30 is a third surface 4110, and the first dome 412 is fixed to the second fixing portion 4113 Of the third surface 4110 away from the magnetic circuit system 30.
  • the folded ring portion 4112 is an arc-shaped recess that is recessed from the third surface 4110 toward the magnetic circuit system 30.
  • the folded ring portion 4112 achieves enhanced elastic vibration during the sounding operation of the speaker, and simultaneously recessing in the direction close to the magnetic circuit system 30 can effectively reduce the space occupied by the outward extension, thereby further optimizing the speaker
  • the overall size is miniaturized, which further reduces the height and size of the speaker.
  • the speaker of the present invention includes two auxiliary magnets 33
  • the magnetic circuit system 30 further includes a main pole core 34 stacked on the main magnet 32 and stacked on The secondary pole core 35 on the secondary magnetic steel 33.
  • the yoke 31 is assembled with the basin frame 10 so that the main magnetic steel 32, the secondary magnetic steel 33 and other components are assembled in the storage space 100 formed by the basin frame 10, and the voice coil 43 is driven to vibrate under the magnetic induction of the main magnetic steel 32 to drive the diaphragm 41 Vibrates and sounds, and by using the main pole core 34 to cooperate with the main magnet 32 and the auxiliary magnet 33 to cooperate with the main magnet 32, and supplementing the auxiliary pole core 35 on the auxiliary magnet 33, the magnetic circuit system 30 has A stronger magnetic induction effect, thereby improving the quality of the vibration sound of the vibration system 40 of the speaker.
  • the first dome 412 with a groove 4120 recessed away from the first surface 4122 away from the folding ring 411, and adding a second dome 413 matching the shape of the groove in the groove 4120, so that While the dome structure of the entire speaker is enhanced, the effect of suppressing the split vibration generated on the dome of the speaker at high frequencies is achieved, the high-frequency performance of the speaker is improved, the overall sound quality of the speaker is improved, and the dome of the speaker is reduced Resonance frequency.

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

Abstract

本发明提供了扬声器，其包括盆架以及分别固定于盆架的振动系统及具有磁间隙的磁路系统，振动系统包括固定于盆架的振膜、插设于磁间隙以驱动振膜振动发声的音圈，振膜包括固定于盆架的折环以及叠设于折环中间的第一球顶，振膜还包括设置于折环与第一球顶之间的第二球顶，第一球顶靠近折环的表面为第一表面，第一球顶设有自第一表面向远离折环凹陷的凹槽，第二球顶设置于凹槽内。该扬声器可以解决现有技术中的扬声器在工作过程中球顶会因为强度不足而产生分割振动，从而影响产品的高频灵敏度的问题。

Description

扬声器 技术领域
本发明涉及声学设备技术领域，尤其涉及一种扬声器。
 背景技术
现有技术的扬声器所应用的振膜，尤其指位于出音孔位置处的振膜，为了获得振动效果而带动空气振动以获得更显著的音量、音质效果，振膜设置了折环部，通过折环部形成的弯曲曲面形成的弹性形变作用而增强了振膜的振动作用。但是，在工作过程中，当扬声器的尺寸较大时，由于现有技术的扬声器中只有一个平板状的球顶，振膜在振动的过程中，音圈难以对振膜的球顶起到很好的支撑作用，球顶会因为强度不足而产生分割振动，从而影响产品的高频灵敏度。
 技术问题
本发明的目的在于提供一种扬声器，旨在解决现有技术中的扬声器在工作过程中音圈难以对振膜的球顶起到很好的支撑作用，球顶会因为强度不足而产生分割振动，从而影响产品的高频灵敏度的问题。
 技术解决方案
本发明的技术方案如下：
本实施例的扬声器，其包括盆架以及分别固定于盆架的振动系统及具有磁间隙的磁路系统，振动系统包括固定于盆架的振膜、插设于磁间隙以驱动振膜振动发声的音圈，振膜包括固定于盆架的折环以及叠设于折环中间的第一球顶，振膜还包括设置于折环与第一球顶之间的第二球顶，第一球顶靠近折环的表面为第一表面，第一球顶设有自第一表面向远离折环凹陷的凹槽，第二球顶设置于凹槽内。
优选地，第一球顶的中间区域开设有一个凹槽，第二球顶嵌设于凹槽的中间位置内。
优选地，第一球顶和第二球顶均为长方形板，第一球顶包括相对设置的两个长侧边，凹槽贯通长方形板的第一球顶的两个长侧边，第二球顶包括相对设置的两个第一侧边和连接第一侧边的相对的两个第二侧边，两个第一侧边分别与凹槽的两侧槽壁相接触，两个第二侧边分别与长方形板的第一球顶的两个长侧边平齐。
优选地，第二球顶靠近折环的表面为第二表面，第二表面与第一表面平齐。
优选地，折环包括固定于盆架的第一固定部、自第一固定部的靠近折环内部的一端向折环内部延伸的折环部、以及自折环部向折环内部延伸的第二固定部，第二固定部远离磁路系统的表面为第三表面，第一球顶固定于第三表面。
优选地，第一表面胶粘固定于第三表面。
优选地，折环部为自第三表面向靠近磁路系统的方向凹陷的弧形凹陷。
优选地，磁路系统包括磁轭、固定于磁轭上的主磁钢以及分别间隔设置于主磁钢相对两侧并与主磁钢形成磁间隙的副磁钢。
优选地，副磁钢包括两个，磁路系统还包括叠设于主磁钢上的主极芯以及叠设于副磁钢上的两个副极芯。
 有益效果
本发明的有益效果在于：
在该扬声器运行而发声的过程中，音圈在变化电流以及磁路系统的共同作用下，音圈带动振膜振动，从而使振膜附近的空气振动而发声，在振膜振动的过程中，通过在第一球顶设置自第一表面向远离折环凹陷的凹槽，并在凹槽中增设与凹槽形状相匹配的第二球顶，使得整个扬声器的球顶结构得到增强的同时，达到抑制高频时扬声器的球顶上产生的分割振动的效果，提升扬声器的高频性能，提高了扬声器的整体发声质量，降低了扬声器的球顶的共振频率。
 附图说明
图1为本发明的扬声器的第一分解图；
图2为图1中A处的放大图；
图3为本发明的扬声器的第二分解图；
图4为本发明的扬声器在装配后的立体图；
图5为图4沿B-B方向的剖视图。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
如图1至图5所示，本实用新型的实施例提供的扬声器包括盆架10以及分别固定于盆架10的振动系统40及磁路系统30。磁路系统30包括磁轭31、固定于磁轭31上的主磁钢32以及分别间隔设置于主磁钢32相对两侧并与主磁钢32形成磁间隙36的副磁钢33。
振动系统40包括固定于盆架10的振膜41、插设于磁间隙36以驱动振膜41振动发声的音圈43，振膜41包括固定于盆架10的折环411以及叠设于折环411中间的第一球顶412，振膜41还包括设置于折环411与第一球顶412之间的第二球顶413，第一球顶412靠近折环411的表面为第一表面4122，第一球顶412设有自第一表面4122向远离折环411凹陷的凹槽4120，第二球顶413设置于凹槽4120内。
在该扬声器运行而发声的过程中，音圈43在变化电流以及磁路系统30的共同作用下，音圈43带动振膜41振动，从而使振膜41附近的空气振动而发声，在振膜41振动的过程中，通过增设第二球顶413并将第二球顶413与第一球顶412进行装配而协同作用，从而增强扬声器的整个球顶的强度，达到抑制高频时扬声器的球顶上产生的分割振动，提升扬声器的高频性能，提高了扬声器的整体发声质量，降低了扬声器的球顶的共振频率。
如图1和图3所示，在本实施例中，第一球顶412的中间区域开设有一个凹槽4120，第二球顶413嵌设于凹槽4120的中间位置内。现有技术的扬声器中，采用只有一个平板状球顶的振动系统中，在扬声器工作过程中，球顶受到音圈43作用而产生的分割振动使得球顶的中间区域容易产生共振现象，继而影响振膜41的振动而影响扬声器的发声质量，因此，本实用新型的技术将第二球顶413设置在第一球顶412的中间区域，达到调整第一球顶412的中间区域的共振频率的目的，并且通过第二球顶413来增强了第一球顶412的中间区域的自身强度，从而抑制扬声器发声过程中出现的分割振动现象。
在本实施例中，如图2所示，第二球顶413为长方形板，第一球顶412包括两个相对设置的长侧边4123，凹槽4120贯通第一球顶412的两个长侧边4123，第二球顶413包括相对设置的两个第一侧边4131和连接两个第一侧边4131且相对设置的两个第二侧边4132，两个第一侧边4131分别与凹槽4120的两侧槽壁4121相接触，两个第二侧边4132分别与第一球顶412的两个长侧边4123平齐，也就是说，第二球顶413的尺寸大小与凹槽4120的长宽尺寸相当（实际上，第二球顶413的板面面积大小可以略小于凹槽4120的槽底面积大小）。这样，在将第二球顶413装配至第一球顶412的凹槽4120的过程中，利用第二球顶413的两个第一侧边4131分别与凹槽4120的两侧槽壁4121相接触，即可实现装配过程中的定位操作，无需再另外进行定位操作即可将第二球顶413正确放置在凹槽4120中，装配过程方便快捷。并且，在本实施例中，第一表面4122是通过液态胶粘剂胶粘固定于第三表面4110上，方便快捷，且制造、加工工序成本低廉。
进一步地，第二球顶413的靠近折环411的表面为第二表面4133，当第二球顶413在凹槽4120中装配完成之后，第二表面4133与第一表面4122平齐，如此使得增设了第二球顶413后的整体球顶的厚度并没有增加，同时也方便了第一球顶413与折环411之间的胶合。也就是说，本实用新型在增设了第二球顶413之后并没有影响整体球顶的厚度而避免了扬声器的整体尺寸大小在组装完成后被增大的问题，在优化了扬声器整体发声质量的同时也实现了扬声器整体尺寸的优化保持。
参见图5所示，折环411包括固定于盆架10的第一固定部4111、自第一固定部4111的靠近折环411内部的一端向折环411内部延伸的折环部4112以及自折环部4112向所述折环411内部延伸的第二固定部4113，第二固定部4113远离所述磁路系统30的表面为第三表面4110，第一球顶412固定于第二固定部4113的远离磁路系统30的第三表面4110。当振膜41的各个组成部分粘接固定于盆架10之后，如图1、图3、图4和图5所示，通过将盖板20固定于盆架10上并罩盖住振膜41，此时，振膜41的第一固定部4111夹紧装配在盆架10的边缘与盖板20的边缘之间，并且仍然在第一固定部4111和盆架10之间利用液态胶粘剂进行胶粘固定。
在本实施例中，折环部4112为自第三表面4110向靠近磁路系统30的方向凹陷的弧形凹陷。如此，在保证折环部4112在扬声器发声工作过程中实现增强弹性振动作用的基础上，同时向靠近磁路系统30的方向凹陷能够有效地减少向外延伸所占用的空间，从而进一步优化扬声器的整体尺寸小型化设计，进一步降低扬声器的高度尺寸大小。
如图1、图3和图5所示，进一步地，本实用新型的扬声器包括两个副磁钢33，磁路系统30还包括叠设于主磁钢32的主极芯34以及叠设于副磁钢33上的副极芯35。磁轭31与盆架10组装使得主磁钢32、副磁钢33等组件装配在盆架10形成的收容空间100中，在主磁钢32的磁感应作用下驱动音圈43振动而带动振膜41振动发声，并且，通过使用主极芯34与主磁钢32配合以及副磁钢33与主磁钢32配合，并在副磁钢33上辅以副极芯35，使得磁路系统30具有更强的磁感应效应，从而提高扬声器的振动系统40振动发声的质量。
综上所述，通过在第一球顶412设置自第一表面4122向远离折环411凹陷的凹槽4120，并在凹槽4120中增设与凹槽形状相匹配的第二球顶413，使得整个扬声器的球顶结构得到增强的同时，达到抑制高频时扬声器的球顶上产生的分割振动的效果，提升扬声器的高频性能，提高了扬声器的整体发声质量，降低了扬声器的球顶的共振频率。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (9)

  1. 一种扬声器，其包括盆架以及分别固定于所述盆架的振动系统及具有磁间隙的磁路系统，所述振动系统包括固定于所述盆架的振膜、插设于所述磁间隙以驱动所述振膜振动发声的音圈，所述振膜包括固定于所述盆架的折环以及叠设于所述折环中间的第一球顶，其特征在于，所述振膜还包括设置于所述折环与所述第一球顶之间的第二球顶，所述第一球顶靠近所述折环的表面为第一表面，所述第一球顶设有自所述第一表面向远离所述折环凹陷的凹槽，所述第二球顶设置于所述凹槽内。
  2. 根据权利要求1所述的扬声器，其特征在于，所述第一球顶的中间区域开设有一个所述凹槽，所述第二球顶嵌设于所述凹槽的中间位置内。
  3. 根据权利要求2所述的扬声器，其特征在于，所述第二球顶为长方形板，所述第一球顶包括相对设置的两个长侧边，所述凹槽贯通所述第一球顶的两个所述长侧边，所述第二球顶包括相对设置的两个第一侧边和连接所述第一侧边的相对的两个第二侧边，两个所述第一侧边分别与所述凹槽的两侧槽壁相接触，两个所述第二侧边分别与所述第一球顶的两个所述长侧边平齐。
  4. 根据权利要求1至3中任一项所述的扬声器，其特征在于，所述第二球顶靠近所述折环的表面为第二表面，所述第二表面与所述第一表面平齐。
  5. 根据权利要求1所述的扬声器，其特征在于，所述折环包括固定于所述盆架的第一固定部、自所述第一固定部的靠近所述折环内部的一端向所述折环内部延伸的折环部、以及自所述折环部向所述折环内部延伸的第二固定部，所述第二固定部远离所述磁路系统的表面为第三表面，所述第一球顶固定于所述第三表面。
  6. 根据权利要求5所述的扬声器，其特征在于，所述第一表面胶粘固定于所述第三表面。
  7. 根据权利要求5所述的扬声器，其特征在于，所述折环部为自所述第三表面向靠近所述磁路系统的方向凹陷的弧形凹陷。
  8. 根据权利要求1所述的扬声器，其特征在于，所述磁路系统包括磁轭、固定于所述磁轭上的主磁钢以及分别间隔设置于所述主磁钢相对两侧并与所述主磁钢形成所述磁间隙的副磁钢。
  9. 根据权利要求8所述的扬声器，其特征在于，所述副磁钢包括两个，所述磁路系统还包括叠设于所述主磁钢上的主极芯以及叠设于所述副磁钢上的两个副极芯。
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