WO2023036094A1 - 一种扬声器 - Google Patents

一种扬声器 Download PDF

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Publication number
WO2023036094A1
WO2023036094A1 PCT/CN2022/117134 CN2022117134W WO2023036094A1 WO 2023036094 A1 WO2023036094 A1 WO 2023036094A1 CN 2022117134 W CN2022117134 W CN 2022117134W WO 2023036094 A1 WO2023036094 A1 WO 2023036094A1
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WIPO (PCT)
Prior art keywords
hole
diaphragm
bracket
fixed
rear adjustment
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PCT/CN2022/117134
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English (en)
French (fr)
Inventor
陈新得
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深圳市万红苹果电子有限公司
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Application filed by 深圳市万红苹果电子有限公司 filed Critical 深圳市万红苹果电子有限公司
Priority to JP2024515355A priority Critical patent/JP2024531630A/ja
Priority to EP22866557.6A priority patent/EP4401424A1/en
Publication of WO2023036094A1 publication Critical patent/WO2023036094A1/zh

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    • 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
    • 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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the invention relates to an electroacoustic device, in particular to a loudspeaker.
  • the quality of the structure of the speaker determines its sound quality.
  • the utility model patent No.: CN202021319275.9 discloses a speaker and a sound box.
  • the speaker includes a vibration system and a magnetic circuit system.
  • the vibration system includes a diaphragm.
  • the magnetic circuit includes a magnet, and the loudspeaker also includes a diaphragm support arranged on the magnet and between the diaphragm and the magnet; there is a gap between the diaphragm support and the diaphragm; when the diaphragm When pressed, the diaphragm support supports the diaphragm.
  • the single diaphragm of this utility model cannot simultaneously simulate the low-frequency direct arrival and reflection delay in the natural sound field, and it is also difficult to obtain a balance between low-frequency strength and low-frequency dive, and the sound quality is poor.
  • the technical problem to be solved by the present invention is to provide a loudspeaker with better sound quality.
  • a loudspeaker includes a bracket, a vibration system and a magnetic circuit assembly
  • the vibration system includes a diaphragm, a passive diaphragm and a voice coil
  • the magnetic circuit assembly includes an inner magnetic ring and a magnetic circuit assembly.
  • the outer magnetic ring, the periphery of the diaphragm is fixed on the top of the bracket, the voice coil is suspended under the diaphragm, and is located in the magnetic gap between the inner magnetic ring and the outer magnetic ring; the space between the diaphragm and the magnetic circuit assembly is the vibration Cavity; the bracket is a ring structure; the periphery of the passive diaphragm is fixed on the bottom of the bracket, and the space between the passive diaphragm and the magnetic circuit assembly forms a resonant cavity; connected.
  • the conduction hole is located at the center of the inner magnetic ring.
  • the loudspeaker described above comprises a damping net, an annular rear adjustment board and an annular PCB board, the periphery of the passive diaphragm is fixed on the top surface of the rear adjustment board, and the PCB board is fixed on the bottom surface of the rear adjustment board; the periphery of the rear adjustment board It is fixed on the bottom of the bracket; the middle part of the passive diaphragm includes a through hole, and the damping net is installed on the through hole of the passive diaphragm.
  • the loudspeaker described above comprises a damping net, an annular rear adjustment plate and an annular PCB board, the periphery of the passive diaphragm is fixed on the edge of the rear adjustment plate inner hole, and the PCB board is fixed on the bottom surface of the rear adjustment plate; The periphery is fixed on the bottom of the bracket; the middle part of the passive diaphragm includes a through hole, and the damping net is installed on the through hole of the passive diaphragm.
  • the loudspeaker described above comprises a damping net, an annular rear adjustment plate and an annular PCB board, the periphery of the passive diaphragm is fixed on the edge of the rear adjustment plate inner hole, and the PCB board is fixed on the bottom surface of the rear adjustment plate; The periphery is fixed on the bottom of the bracket; the rear adjustment board and the PCB board include through holes communicating with each other, and the damping net is installed on the through holes of the rear adjustment board and the PCB board.
  • the inner hole of the annular rear adjustment plate is a stepped hole with a large upper part and a smaller lower part.
  • the inner hole of the annular bracket is a stepped hole with a large upper part and a smaller lower part.
  • the large hole of the stepped hole includes an annular bottom plate.
  • the annular bottom plate includes a plurality of damping holes, and the damping holes communicate the vibration cavity with the outside.
  • the loudspeaker described above includes a damping net and a C-shaped PCB board.
  • the inner hole of the bracket is a stepped hole with a large upper part and a smaller lower part.
  • the large hole of the stepped hole includes a circular bottom plate.
  • the bottom surface; the annular bottom plate includes a through hole connecting the vibration cavity and the outside, the through hole is arranged at the opening of the C-shaped PCB, and the damping net is installed on the through hole of the annular bottom plate.
  • the above-mentioned loudspeaker includes a ventilating cover, the cover is installed above the diaphragm, and the periphery of the cover is fixed on the top of the ring support; the bottom surface of the periphery of the cover is pressed against the edge of the diaphragm.
  • the invention adds a passive radiator on the basis of the traditional loudspeaker, so that an acoustic lever structure is formed in the package cavity of the bracket, which greatly reduces the natural frequency f 0 of the small-sized loudspeaker unit, and realizes low-frequency dual-phase output on one loudspeaker, It provides effective support for restoring the natural sound field of terminal products using speakers of this structure.
  • Fig. 1 is an exploded view of the speaker of Embodiment 1 of the present invention.
  • Fig. 2 is a cross-sectional structure diagram of the speaker of Embodiment 1 of the present invention.
  • Fig. 3 is a cross-sectional structure diagram of a speaker according to Embodiment 2 of the present invention.
  • Fig. 4 is a cross-sectional structure diagram of a speaker in Embodiment 3 of the present invention.
  • Fig. 5 is a cross-sectional structure diagram of a loudspeaker according to Embodiment 4 of the present invention.
  • Fig. 6 is a left side view of the speaker of Embodiment 5 of the present invention.
  • Fig. 7 is a cross-sectional structure diagram of a speaker according to Embodiment 6 of the present invention.
  • FIG. 1 The structure of the loudspeaker with the passive radiator in Example 1 of the present invention is shown in Figure 1 and Figure 2, including a ring-shaped support 1, a breathable cover 4, a ring-shaped rear adjustment plate 8, a ring-shaped PCB board 9, a vibration system and Magnetic circuit assembly 5.
  • the vibration system includes a diaphragm 2, a passive diaphragm 2 and a voice coil 3.
  • the magnetic circuit assembly 5 is fixed in the middle of the inner hole of the support 1, including an inner magnetic ring and an outer magnetic ring.
  • the bottom of the inner magnetic ring and the bottom of the outer magnetic ring pass through a magnetic
  • the yoke is connected, and the center of the inner magnetic ring has a vertically arranged via hole.
  • the periphery of the diaphragm 2 is fixed on the top of the support 1
  • the protective cover 4 is installed above the diaphragm 2
  • the periphery of the protective cover 4 is fixed on the top of the annular support 1 .
  • the bottom surface of the periphery of the cover 4 presses against the edge of the diaphragm 2 .
  • the voice coil 3 is suspended below the diaphragm 2, and the lower part of the voice coil 3 is located in the magnetic gap between the inner magnetic ring and the outer magnetic ring.
  • the space between the diaphragm 2 and the magnetic circuit assembly 5 constitutes a vibration cavity.
  • the periphery of the passive diaphragm 2 is fixed on the bottom of the bracket 1, and the space between the passive diaphragm 2 and the magnetic circuit assembly 5 forms a resonant cavity.
  • the resonance cavity communicates with the vibration cavity through the via hole.
  • the periphery of the passive diaphragm 2 is fixed on the top surface of the rear adjustment plate 8 , and the PCB board 9 is fixed on the bottom surface of the rear adjustment plate 8 .
  • the periphery of rear adjusting plate 8 is fixed on the bottom of support 1.
  • There is a through hole 601 in the middle of the passive diaphragm 2 and the damping net 7 is installed on the through hole 601 of the passive diaphragm 2 .
  • the passive diaphragm 2, the rear adjustment plate 8 and the damping net 7 of the first embodiment constitute the passive radiator of the first embodiment.
  • Embodiment 2 of the present invention The structure of the loudspeaker with a passive radiator in Embodiment 2 of the present invention is shown in FIG. 3 .
  • the difference between Embodiment 2 and Embodiment 1 lies in that the structure of the passive radiator is slightly different.
  • the periphery of the passive diaphragm 2 is fixed on the edge of the inner hole of the rear adjustment board 8
  • the PCB board 9 is fixed on the bottom surface of the rear adjustment board 8
  • the periphery of rear adjusting plate 8 is fixed on the bottom of support 1.
  • Embodiment 3 The structure of a loudspeaker with a passive radiator in Embodiment 3 of the present invention is shown in FIG. 4 .
  • the difference between Embodiment 3 and Embodiment 1 lies in the slight difference in the structure of the passive radiator.
  • the periphery of the passive diaphragm 2 is fixed on the edge of the inner hole of the rear adjustment board 8
  • the PCB board 9 is fixed on the bottom surface of the rear adjustment board 8
  • the periphery of rear adjusting plate 8 is fixed on the bottom of support 1.
  • Embodiment 4 The structure of the loudspeaker with the passive radiator in Embodiment 4 of the present invention is shown in FIG. 5 .
  • the difference between Embodiment 4 and Embodiment 1 lies in the slight difference in the structure of the passive radiator.
  • the inner hole of the annular rear adjusting plate 8 is a stepped hole with a larger upper part and a smaller lower one, and the periphery of the rear adjusting plate 8 is fixed on the bottom of the bracket 1 .
  • the periphery of the passive diaphragm 2 is fixed on the top surface of the large hole in the step hole of the rear adjustment plate 8, and the PCB board 9 is fixed on the bottom surface of the rear adjustment plate 8. Same diameter.
  • Embodiment 5 of the present invention The structure of the loudspeaker with a passive radiator in Embodiment 5 of the present invention is shown in FIG. 6 .
  • the difference between Embodiment 5 and Embodiment 1 lies in the slightly different structure of the bracket.
  • the annular support 1 is a T-shaped structure with a large top and a small bottom.
  • the inner hole of the support 1 is a stepped hole with a large top and a small bottom.
  • the large hole of the stepped hole includes a ring-shaped bottom plate.
  • the damping hole communicates the vibration chamber with the outside.
  • Embodiment 6 The structure of the loudspeaker with a passive radiator in Embodiment 6 of the present invention is shown in FIG. 7 .
  • the difference between Embodiment 6 and Embodiment 1 mainly lies in the structure of the passive radiator and the structure of the bracket.
  • the annular bracket 1 is a T-shaped structure with a large top and a small bottom
  • the inner hole of the bracket 1 is a stepped hole with a large top and a small bottom.
  • the large hole of the stepped hole includes a circular bottom plate
  • the PCB board 9 is C-shaped. There is an opening.
  • the C-shaped PCB board 9 is fixed on the bottom surface outside the annular bottom plate of the bracket 1 .
  • the annular bottom plate has a through hole connecting the vibration chamber and the outside, the through hole is arranged at the opening of the C-shaped PCB board 9, and the damping net 7 is installed on the through hole of the annular bottom plate.
  • Embodiment 6 The periphery of the passive diaphragm 2 is directly fixed on the bottom of the bracket 1 .
  • the passive diaphragm 2 is an integral film, with or without a through hole in the middle.
  • the speakers in the above embodiments of the present invention add a passive radiator to the traditional speakers, which has better acoustic performance, effectively increases the low-frequency response of the speaker unit, and is beneficial to the performance improvement of end products.

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

Abstract

本发明公开了一种扬声器，包括支架、振动系统和磁路组件，所述振动系统包括振膜、被动振膜和音圈，磁路组件包括内磁环及外磁环，振膜的周边固定在支架的顶部，音圈悬挂于振膜的下方，位于内磁环与外磁环之间的磁隙中；振膜与磁路组件之间的空间为振动腔；支架为环形结构；被动振膜的周边固定在支架的底部，被动振膜与磁路组件之间的空间构成共振腔；磁路组件包括导通孔，共振腔通过导通孔与振动腔连通。本发明的增加了被动辐射器，在封装的支架腔体内形成了声杠杆结构，大大降低了小尺寸扬声器单元的固有频率f0，而且在一个扬声器上实现了低频的双相位输出，对终端产品还原自然声场提供了有效的支持。

Description

一种扬声器 [技术领域]
本发明涉及电声器件，尤其涉及一种扬声器。
[背景技术]
扬声器的结构优劣决定其声音品质，专利号为:CN202021319275.9的实用新型公开一种扬声器及音箱，所述扬声器包括振动系统和磁路系统，所述振动系统包括振膜，所述磁路系统包括磁铁，所述扬声器还包括设置在所述磁铁上且位于所述振膜和磁铁之间的振膜支架；所述振膜支架与所述振膜之间具有间隙；当所述振膜被按压时，所述振膜支架顶持所述振膜。该实用新型单一的振膜无法同时模拟自然声场中低频的直达和反射延时，而且在低频力度与低频下潜之间也难以获得均衡，声音品质较差。
[发明内容]
本发明要解决的技术问题是提供一种声音品质较好的扬声器。
为了解决上述技术问题，本发明采用的技术方案是，一种扬声器，包括支架、振动系统和磁路组件，所述振动系统包括振膜、被动振膜和音圈，磁路组件包括内磁环及外磁环，振膜的周边固定在支架的顶部，音圈悬挂于振膜的下方，位于内磁环与外磁环之间的磁隙中；振膜与磁路组件之间的空间为振动腔；支架为环形结构；被动振膜的周边固定在支架的底部，被动振膜与磁路组件之间的空间构成共振腔；磁路组件包括导通孔，共振腔通过导通孔与振动腔连通。
以上所述的扬声器，所述的导通孔位于内磁环的中心。
以上所述的扬声器，包括阻尼网、环形的后调节板和环形的PCB板，被动 振膜的周边固定在后调节板的顶面，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；被动振膜的中部包括通孔，阻尼网安装在被动振膜的通孔上。
以上所述的扬声器，包括阻尼网、环形的后调节板和环形的PCB板，被动振膜的周边固定在后调节板内孔的边沿，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；被动振膜的中部包括通孔，阻尼网安装在被动振膜的通孔上。
以上所述的扬声器，包括阻尼网、环形的后调节板和环形的PCB板，被动振膜的周边固定在后调节板内孔的边沿，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；后调节板和PCB板包括相互连通的通孔，阻尼网安装在后调节板和PCB板的通孔上。
以上所述的扬声器，环形后调节板的内孔为上大下小的阶梯孔。
以上所述的扬声器，环形支架的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，环形底板包括复数个阻尼孔，阻尼孔将振动腔与外部连通。
以上所述的扬声器，包括阻尼网和C形的PCB板，支架的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，C形的PCB板固定在支架环形底板的底面；环形底板包括连通振动腔与外部的通孔，通孔布置在C形PCB板的开口部位，阻尼网安装在环形底板的通孔上。
以上所述的扬声器，包括透气的护盖，护盖安装在振膜的上方，护盖的周边固定在环形支架的顶部；护盖的周边的底面压在振膜的边缘上。
本发明在传统扬声器的基础上增加了被动辐射器，使支架封装腔体内形成声杠杆结构，大大降低了小尺寸扬声器单元的固有频率f 0，而且在一个扬声器 上实现了低频的双相位输出，对于应用该结构扬声器的终端产品还原自然声场提供了有效的支持。
[附图说明]
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是本发明实施例1扬声器的分解图。
图2是本发明实施例1扬声器的剖视结构图。
图3是本发明实施例2扬声器的剖视结构图。
图4是本发明实施例3扬声器的剖视结构图。
图5是本发明实施例4扬声器的剖视结构图。
图6是本发明实施例5扬声器的左视图。
图7是本发明实施例6扬声器的剖视结构图。
[具体实施方式]
本发明实施例1带被动辐射器的扬声器的结构如图1和图2所示，包括环形的支架1，透气的护盖4、环形的后调节板8、环形的PCB板9、振动系统和磁路组件5。
振动系统包括振膜2、被动振膜2和音圈3，磁路组件5固定在支架1内孔的中部，包括内磁环及外磁环，内磁环的底部与外磁环的底部通过磁轭连接，内磁环的中心有一个竖直布置的导通孔。
振膜2的周边固定在支架1的顶部，护盖4安装在振膜2的上方，护盖4的周边固定在环形支架1的顶部。护盖4的周边的底面压在振膜2的边缘上。
音圈3悬挂于振膜2的下方，音圈3的下部位于内磁环与外磁环之间的磁隙中。振膜2与磁路组件5之间的空间构成振动腔。被动振膜2的周边固定在 支架1的底部，被动振膜2与磁路组件5之间的空间构成共振腔。共振腔通过导通孔与振动腔连通。
被动振膜2的周边固定在后调节板8的顶面，PCB板9固定在后调节板8的底面。后调节板8的周边固定在支架1的底部。被动振膜2的中部有一个通孔601，阻尼网7安装在被动振膜2的通孔601上。
实施例1的被动振膜2、后调节板8和阻尼网7构成实施例1的被动辐射器。
本发明实施例2带被动辐射器的扬声器的结构如图3所示，实施例2与实施例1的区别仅在于被动辐射器的结构略有不同。在实施例2中，被动振膜2的周边固定在后调节板8内孔的边沿上，PCB板9固定在后调节板8的底面。后调节板8的周边固定在支架1的底部。
本发明实施例3带被动辐射器的扬声器的结构如图4所示，实施例3与实施例1的区别仅在于被动辐射器的结构略有不同。在实施例3中，被动振膜2的周边固定在后调节板8内孔的边沿上，PCB板9固定在后调节板8的底面上。后调节板8的周边固定在支架1的底部。后调节板8和PCB板9上有一个相互连通的通孔801，阻尼网7安装在后调节板8和PCB板9的通孔上。
本发明实施例4带被动辐射器的扬声器的结构如图5所示，实施例4与实施例1的区别仅在于被动辐射器的结构略有不同。在实施例3中，环形后调节板8的内孔为上大下小的阶梯孔，后调节板8的周边固定在支架1的底部。被动振膜2的周边固定在后调节板8阶梯孔大孔的顶面上，PCB板9固定在后调节板8的底面，PCB板9的内孔直径与后调节板8阶梯孔小孔的直径相同。
本发明实施例5带被动辐射器的扬声器的结构如图6所示，实施例5与实施例1的区别仅在于支架的结构略有不同。在实施例5中，环形支架1为上大 下小的T形结构，支架1的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，环形底板上有多个阻尼孔，阻尼孔将振动腔与外部连通。
本发明实施例6带被动辐射器的扬声器的结构如图7所示，实施例6与实施例1的区别主要在于被动辐射器的结构和支架的结构都有不同。在实施例6中，环形支架1为上大下小的T形结构，支架1的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，PCB板9为C形，有一个开口。
C形的PCB板9固定在支架1环形底板外侧的底面。环形底板有一个连通振动腔与外部的通孔，通孔布置在C形PCB板9的开口部位，阻尼网7安装在环形底板的通孔上。
实施例6被动振膜2的周边直接固定在支架1的底部。被动振膜2为整体薄膜，中部有没有通孔。
本发明以上实施例的扬声器在传统扬声器的基础上增加了被动辐射器，声学性能更加优异，有效地增加了扬声器单体的低频响应，有利于终端产品的性能提升。

Claims (9)

  1. 一种扬声器，包括支架、振动系统和磁路组件，所述振动系统包括振膜和音圈，磁路组件包括内磁环及外磁环，振膜的周边固定在支架的顶部，音圈悬挂于振膜的下方，位于内磁环与外磁环之间的磁隙中；振膜与磁路组件之间的空间为振动腔；其特征在于，所述的振动系统包括被动振膜，支架为环形结构；被动振膜的周边固定在支架的底部，被动振膜与磁路组件之间的空间构成共振腔；磁路组件包括导通孔，共振腔通过导通孔与振动腔连通。
  2. 根据权利要求1所述的扬声器，其特征在于，所述的导通孔位于内磁环的中心。
  3. 根据权利要求1所述的扬声器，其特征在于，包括阻尼网、环形的后调节板和环形的PCB板，被动振膜的周边固定在后调节板的顶面，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；被动振膜的中部包括通孔，阻尼网安装在被动振膜的通孔上。
  4. 根据权利要求1所述的扬声器，其特征在于，包括阻尼网、环形的后调节板和环形的PCB板，被动振膜的周边固定在后调节板内孔的边沿，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；被动振膜的中部包括通孔，阻尼网安装在被动振膜的通孔上。
  5. 根据权利要求1所述的扬声器，其特征在于，包括阻尼网、环形的后调节板和环形的PCB板，被动振膜的周边固定在后调节板内孔的边沿，PCB板固定在后调节板的底面；后调节板的周边固定在支架的底部；后调节板和PCB板包括相互连通的通孔，阻尼网安装在后调节板和PCB板的通孔上。
  6. 根据权利要求3所述的扬声器，其特征在于，环形后调节板的内孔为上大下小的阶梯孔。
  7. 根据权利要求3所述的扬声器，其特征在于，环形支架的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，环形底板包括复数个阻尼孔，阻尼孔将振动腔与外部连通。
  8. 根据权利要求1所述的扬声器，其特征在于，包括阻尼网和C形的PCB板，支架的内孔为上大下小的阶梯孔，阶梯孔的大孔包括环形的底板，C形的PCB板固定在支架环形底板的底面；环形底板包括连通振动腔与外部的通孔，通孔布置在C形PCB板的开口部位，阻尼网安装在环形底板的通孔上。
  9. 根据权利要求1所述的扬声器，其特征在于，包括透气的护盖，护盖安装在振膜的上方，护盖的周边固定在环形支架的顶部；护盖的周边的底面压在振膜的边缘上。
PCT/CN2022/117134 2021-09-08 2022-09-05 一种扬声器 WO2023036094A1 (zh)

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