WO2018205440A1 - 微型发声器 - Google Patents

微型发声器 Download PDF

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Publication number
WO2018205440A1
WO2018205440A1 PCT/CN2017/096851 CN2017096851W WO2018205440A1 WO 2018205440 A1 WO2018205440 A1 WO 2018205440A1 CN 2017096851 W CN2017096851 W CN 2017096851W WO 2018205440 A1 WO2018205440 A1 WO 2018205440A1
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WIPO (PCT)
Prior art keywords
positioning
yoke
notch
transition
outer casing
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PCT/CN2017/096851
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English (en)
French (fr)
Inventor
郭翔
刘华伟
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Goertek Inc
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Goertek Inc
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Publication of WO2018205440A1 publication Critical patent/WO2018205440A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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 electroacoustic products, and in particular to a miniature sound generator.
  • Micro-speakers are important acoustic components of portable electronic devices used to convert electrical and acoustic signals. They are energy conversion devices.
  • the micro-speaker generally includes a casing and a vibration system and a magnetic circuit system housed in the casing.
  • the magnetic circuit system includes a yoke, and the central portion of the yoke is sequentially fixed with an inner magnet and an inner magnetic plate, and is sequentially fixed at an edge portion of the yoke. a side magnet and an edge magnetic plate, a magnetic gap between the inner magnet and the inner magnetic plate and the side magnet and the side magnetic plate;
  • the vibration system includes a diaphragm and a voice coil, and the voice coil is made in the magnetic gap of the magnetic circuit system.
  • the upper and lower cutting magnetic lines move, which drives the diaphragm to inspire the air to sound.
  • the positioning between the yoke and the outer casing is achieved by the positioning notch on the yoke and the positioning boss on the outer casing, and the two are interference fit to ensure that the positioning standards of the voice coil, the outer casing and the magnetic circuit are consistent.
  • the magnetic circuit is designed to be maximized. This design allows the yoke to be positioned with the housing because of the rounded transition between the two straight sides of the positioning structure on the yoke. Therefore, the size of the straight side which plays the role of positioning is too small, which is disadvantageous for the assembly positioning of the micro sounder, the concentricity is poor, and the acoustic performance is affected.
  • the technical problem to be solved by the present application is to provide a miniature sound generator which has good assembly positioning effect, good concentricity and high acoustic performance.
  • a miniature sound generator comprising a housing and a vibration system and a magnetic circuit system housed in the housing, the magnetic circuit system comprising a plate-shaped yoke, wherein a central portion of the yoke is sequentially provided with a central magnet and a center guide a magnetic plate, an edge portion of the yoke A side magnet and an edge magnetic conductive plate are sequentially disposed, the yoke is fixed to a lower end portion of the outer casing, and a corner of the yoke is provided with a positioning notch formed by two straight sides, and a lower end of the outer casing is provided a positioning boss which is formed by two straight sides perpendicularly matched with the positioning notch, and a portion where the two straight sides of the positioning notch are connected is provided with an inwardly recessed transition notch, and the positioning boss A right angle formed by the two straight sides is inserted into the transition notch; the transition notch is provided with at least two, and is disposed at an angle.
  • the positioning notch is provided with four, and the four positioning notches are respectively disposed at four corners of the yoke, and the transition notches are respectively disposed on the four positioning notches.
  • the transition gap is formed by indenting one of the two straight sides of the positioning notch.
  • the transition gap is formed by the two straight sides of the positioning notch being simultaneously recessed inward.
  • the transition gap is a regular shape or an irregular shape, and further preferably, the transition gap is semicircular, square or elliptical.
  • the portion of the yoke corresponding to the voice coil lead of the voice coil of the vibration system is provided with a recessed escape groove.
  • the upper end of the outer casing is combined with a protective cover, and the middle of the protective cover is provided with an acoustic hole.
  • the at least opposite side edge portions of the protective cover are provided with a downwardly extending fastening portion, and the fastening portion is provided with an inwardly convex concave buckle, and the concave concave buckle is engaged On the side wall of the outer casing.
  • the side wall of the outer casing is provided with a mounting groove extending through the inner and outer sides of the side wall corresponding to each of the side magnets, and the side magnet is fixed in the mounting groove.
  • the connecting portions of the two straight sides of the positioning notch are provided with a transition recess which is recessed inward, and the positioning convex The right angle formed by the two straight sides of the table is inserted into the transition gap to achieve positioning.
  • the structure of the transition gap is larger than the structure of the transition arc in the prior art, and the straight edge size of the positioning notch and the positioning boss is larger, that is, the size of the portion capable of positioning is larger, so that the x-axis and the The y-axis direction plays a better positioning role, greatly improving the concentricity of the micro-speaker and improving the acoustic performance of the micro-speaker.
  • a recessed relief groove is provided in the portion of the yoke that is bent by the voice coil of the voice coil corresponding to the vibration system.
  • the escape groove can effectively avoid the voice coil lead, and avoids the collision of the voice coil lead with the yoke during the vibration of the voice coil, and does not generate a collision sound, thereby improving the sound quality of the micro sounder.
  • the protective cover can protect the folding part of the diaphragm from being deformed by external force during assembly and use, which is beneficial to ensure the acoustics of the microphone Performance stability and service life.
  • the side wall of the outer casing is provided with a mounting groove penetrating the inner and outer sides of the side wall, the side magnet is fixed in the mounting groove, and the structure can maximize the volume of the magnetic circuit system, thereby improving the acoustic performance of the micro sounder.
  • the micro-sounder of the present application solves the technical problem of poor concentricity of the micro-speaker in the prior art.
  • the micro-sounder of the present application has good concentricity, high acoustic performance, good stability, and long service life.
  • FIG. 1 is a schematic exploded view of a microphone of the present application
  • Figure 2 is a combination view of Figure 1;
  • Figure 3 is an enlarged view of a portion A of Figure 2;
  • Figure 4 is an enlarged view of a portion B of Figure 2;
  • the inner finger referred to in this specification refers to the position near the center of the micro-speaker, and the outer finger refers to the position away from the center of the micro-speaker; the direction involved refers to the direction in which the vibration system is provided, and the direction refers to the direction in which the magnetic circuit system is provided.
  • a miniature sound generator includes an annular outer casing 10 having a rectangular structure in which a vibration system and a magnetic circuit system are housed.
  • the vibration system includes a diaphragm 32 whose edge portion is fixed to the upper end surface of the outer casing 10, a diaphragm 34 is fixed to the middle portion of the upper side of the diaphragm 32, and a voice coil 30 is fixed to the middle portion of the lower side of the diaphragm 32.
  • the voice coil 30 leads to two voice coil leads 300 for electrical connection to an external circuit.
  • the magnetic circuit system includes a yoke 20 fixed to the lower end of the outer casing 10, and the yoke 20 has a flat plate structure.
  • the central portion of the inner side of the yoke 20 is sequentially fixed with a central magnet 24 and a central magnetic conductive plate 26, and the four side edges of the yoke 20 are provided.
  • the side magnets 22 and the side magnetic conductive plates 28 are respectively fixed in sequence, and the side magnetic conductive plates 28 are combined with the outer casing 10 by an injection molding process.
  • a magnetic gap is provided between the center magnet 24 and the center magnetic conductive plate 26 and the side magnet 22 and the side magnetic conductive plate 28, and the end of the voice coil 30 is located in the magnetic gap.
  • a positioning structure is disposed between the yoke 20 and the outer casing 10, and the positioning structure is preferably disposed in the micro.
  • the corner portion of the type of sounder includes a positioning notch 202 disposed at a corner of the yoke 20 and a positioning boss 120 disposed at a corner of the lower end surface of the outer casing 10 and adapted to the positioning notch 202.
  • the positioning notch 202 is formed by two straight sides.
  • the side of the positioning boss 120 that is in contact with the two straight sides of the positioning notch 202 is also two straight sides, and the two straight sides are perpendicular to each other to form at least one right angle.
  • the positioning structure is provided with at least two.
  • the two positioning structures should be disposed at an angle.
  • the positioning structure is preferably provided with four, which are distributed at the four corners of the micro-speaker. That is, the positioning notch 202 is provided with four, four positioning notches 202 are respectively disposed at the four corners of the yoke 20, and the corresponding positioning bosses 120 are also provided with four, and four positioning bosses 120 are respectively disposed on the outer casing 10.
  • Four corners Since the lands of the outer casing 10 are disposed on the two corners of the short side of the outer casing 10, the yoke in the embodiment has an asymmetric structure, so the position of the positioning structure is also asymmetric, and the welding is provided.
  • Two positioning structures on the short side of the disk 50 are disposed inside the pad 50, and two positioning structures on the other short side are disposed at the ends of the short side of the side.
  • the two straight sides of the positioning notch 202 are connected with an inwardly recessed transition notch 204, and two straight sides of the positioning boss 120 are formed.
  • the right angle portion is inserted into the transition gap 204.
  • the transition gaps 204 are provided with at least two, and the two transition gaps 204 are disposed on the two opposite positioning gaps 202.
  • the transition gaps 204 are preferably provided with four, and the four transition gaps 204 are respectively disposed at four. Positioning the gap 202.
  • the transition gap 204 is formed by recessing two straight sides of the notch at the same time.
  • the transition gap 204 may also be straight edged by two straight sides.
  • the inner recess is formed, as long as the right angle portion of the positioning boss 120 can be accommodated, the length of the straight side of the positioning boss 120 can be effectively increased, and the positioning effect can be greatly improved.
  • the transition gap 204 is a regular semicircle.
  • the transition gap 204 may be a regular semicircular, square or elliptical shape, or may be irregular.
  • the shape may be any right angle portion that can accommodate the positioning boss 120.
  • the inner side of the yoke 20 is provided with a recessed escape groove 200 corresponding to the bent portion of the voice coil lead 300 of the voice coil 30.
  • the escape groove 200 can prevent the voice coil lead 300 from colliding with the yoke 20, and Conducive to improving the sound quality of the micro-speaker.
  • the upper end of the outer casing 10 is combined with a protective cover 40.
  • the middle portion of the protective cover 40 is provided with an acoustic hole 42 through which the sound emitted by the vibration system is radiated outward.
  • At least opposite side edge portions of the protective cover 40 are provided with downwardly extending engaging portions 44.
  • the four side edges of the protective cover 40 are provided with engaging portions 44.
  • the fastening portion 44 is provided with an inwardly projecting concave buckle 440 which is caught at the edge of the outer casing 10, thereby achieving the engagement of the protective cover 40 with the outer casing 10.
  • the side wall of the outer casing 10 corresponding to each side of the magnet 22 is provided with a mounting groove 14 .
  • the mounting groove 14 penetrates the inner and outer sides of the side wall of the outer casing 10 in the horizontal direction, and the magnets 22 are respectively fixed. In the corresponding mounting slot 14.
  • the present invention effectively increases the length of the straight side of the positioning boss by providing a transition gap at the positioning notch of the yoke, thereby enabling better positioning in the x-axis and y-axis directions, and greatly improving the micro-sounding
  • the concentricity of the device improves the acoustic performance of the microspeaker.
  • the technical solution of the present application is exemplified by taking the micro-speaker of the above structure as an example.
  • the technical solution of the present application is not limited to the micro-speaker of the above structure, and the utility model can be applied to any one of the slabs.
  • the technical solution of the present application can be applied to the microphones of other structures without any creative labor, so no matter how small Whether the other structure of the sounder is the same as that of the above embodiment, as long as a transition notch is provided at the corner of the positioning notch of the yoke for accommodating the corner of the positioning boss, thereby increasing the length of the straight side for positioning. Products that improve the positioning effect fall within the protection scope of the present application.

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

Abstract

一种微型发声器，涉及电声产品技术领域，包括外壳(10)及收容在外壳(10)内的振动系统和磁路系统，磁路系统包括板状的磁轭(20)，磁轭(20)的中心部依次设有中心磁铁(24)和中心导磁板(26)，磁轭(20)的边缘部位依次设有边磁铁(22)和边导磁板(28)，磁轭(20)固定在外壳(10)的下端部，磁轭(20)的角部设有由两条直边垂直构成的定位缺口(202)，外壳(10)的下端设有与定位缺口(202)相配合的也由两条直边垂直构成的定位凸台(120)，定位缺口(202)的两条直边相连接的部位设有向内凹陷的过渡缺口(204)，定位凸台(120)的两条直边形成的直角插入到过渡缺口(204)内；过渡缺口(204)设有至少两个，并对角设置。本微型发声器的同心度好，声学性能高，同时稳定性好，使用寿命长。

Description

微型发声器
交叉引用
本申请引用于2017年5月8日提交的专利名称为“微型发声器”的第201720504538.5号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电声产品技术领域，特别涉及一种微型发声器。
背景技术
微型发声器是便携式电子设备的重要声学部件，用于完成电信号与声音信号之间的转换，是一种能量转换器件。微型发声器通常包括外壳及收容在外壳内的振动系统和磁路系统，磁路系统包括磁轭，磁轭的中心部依次固定有内磁铁和内导磁板，在磁轭的边缘部依次固定有边磁铁和边导磁板，内磁铁和内导磁板与边磁铁和边导磁板之间设有磁间隙；振动系统包括振膜和音圈，音圈在磁路系统的磁间隙内作上下的切割磁力线运动，从而带动振膜策动空气发声。
通常情况下磁轭与外壳之间是通过磁轭上的定位缺口和外壳上的定位凸台来实现定位的，且二者过盈配合，以保证音圈、外壳、磁路的定位基准一致，从而可以满足微型发声器的同心度的要求。目前的微型发声器为了满足性能的要求，磁路会设计得尽量最大化，这样的设计使得磁轭与外壳配合定位时，因为磁轭上的定位结构的两条直边之间采用圆角过渡，从而导致起到定位作用的直边尺寸过小，不利于微型发声器的装配定位，同心度差，声学性能受到影响。
申请内容
针对以上缺陷，本申请所要解决的技术问题是提供一种微型发声器，此微型发声器的装配定位效果好，同心度好，声学性能高。
为解决上述技术问题，本申请的技术方案是：
一种微型发声器，包括外壳及收容在所述外壳内的振动系统和磁路系统，所述磁路系统包括板状的磁轭，所述磁轭的中心部依次设有中心磁铁和中心导磁板，所述磁轭的边缘部位 依次设有边磁铁和边导磁板，所述磁轭固定在所述外壳的下端部，所述磁轭的角部设有由两条直边垂直构成的定位缺口，所述外壳的下端设有与所述定位缺口相配合的也由两条直边垂直构成的定位凸台，所述定位缺口的两条直边相连接的部位设有向内凹陷的过渡缺口，所述定位凸台的两条直边形成的直角插入到所述过渡缺口内；所述过渡缺口设有至少两个，并对角设置。
其中，所述定位缺口设有四个，四个所述定位缺口分别设置在所述磁轭的四个角部，四个所述定位缺口上均设有所述过渡缺口。
其中，所述过渡缺口由所述定位缺口的两条直边中的一条直边向内凹陷形成。
其中，所述过渡缺口由所述定位缺口的两条直边同时向内凹陷形成。
其中，所述过渡缺口为规则形状或不规则形状，进一步的优选，所述过渡缺口为半圆形、方形或椭圆形。
其中，所述磁轭上对应所述振动系统的音圈的音圈引线折弯的部位设有凹陷的避让槽。
其中，所述外壳的上端结合有防护盖，所述防护盖的中部设有出声孔。
其中，所述防护盖的至少相对的两侧边缘部位设有向下延伸的扣合部，所述扣合部上设有向内凸起的内凹卡扣，所述内凹卡扣卡合在所述外壳的侧壁上。
其中，所述外壳的侧壁上对应各所述边磁铁的位置设有贯穿所述侧壁内外两侧的安装槽，所述边磁铁固定在所述安装槽内。
采用了上述技术方案后，本申请的有益效果是：
由于本申请微型发声器的磁轭与外壳之间是通过定位缺口和定位凸台的配合来实现定位的，定位缺口的两条直边相连接的部位设有向内凹陷的过渡缺口，定位凸台的两条直边形成的直角插入到过渡缺口内，实现定位。过渡缺口的结构与现有技术中的过渡圆弧的结构相比，定位缺口和定位凸台的直边尺寸更大，即能够起到定位作用的部位的尺寸更大，从而能够在x轴和y轴方向上起到更好的定位作用，大大的提高了微型发声器的同心度，提高了微型发声器的声学性能。
由于磁轭上对应振动系统的音圈的音圈引线折弯的部位设有凹陷的避让槽。避让槽能够有效的避让音圈引线，避免了音圈引线在音圈振动的过程中与磁轭发生碰撞，不会产生碰撞音，提高了微型发声器的声音质量。
由于外壳的上端结合有防护盖，防护盖的中部设有出声孔。防护盖能够对振膜的折环部起到保护作用，防止其在装配和使用的过程中受到外力而变形，有利于保证微型发声器声学 性能的稳定性及使用寿命。
由于外壳的侧壁上设有贯穿侧壁内外两侧的安装槽，边磁铁固定在安装槽内，此种结构能够最大限度的增大磁路系统的体积，从而提高微型发声器的声学性能。
综上所述，本申请微型发声器解决了现有技术中微型发声器同心度差的技术问题，本申请微型发声器的同心度好，声学性能高，同时稳定性好，使用寿命长。
附图说明
图1是本申请微型发声器的分解结构示意图；
图2是图1的组合图；
图3是图2的A部放大图；
图4是图2的B部放大图；
图中：10、外壳，120、定位凸台，14、安装槽，20、磁轭，200、避让槽，202、定位缺口，204、过渡缺口，22、边磁铁，24、中心磁铁，26、中心导磁板，28、边导磁板，30、音圈，300、音圈引线，32、振膜，34、振动板，40、防护盖，42、出声孔，44、扣合部，440、内凹卡扣，50、焊盘。
具体实施方式
下面结合附图和实施例，进一步阐述本申请。
本说明书中涉及到的内指靠近微型发声器中心的位置，外指远离微型发声器中心的位置；涉及到的方向上指设有振动系统的方向，方向下指设有磁路系统的方向。
如图1和图2共同所示，一种微型发声器，包括环状的外壳10，外壳10为长方形结构，外壳10内收容有振动系统和磁路系统。振动系统包括边缘部固定在外壳10上端面上的振膜32，振膜32上侧的中部固定有振动板34，振膜32下侧的中部固定有音圈30。音圈30引出有两根音圈引线300，用于与外部电路电连接。磁路系统包括固定在外壳10下端的磁轭20，磁轭20为平板状结构，磁轭20内侧的中心部依次固定有中心磁铁24和中心导磁板26，磁轭20的四侧边缘部位分别依次固定有边磁铁22和边导磁板28，边导磁板28通过注塑工艺与外壳10相结合。中心磁铁24和中心导磁板26与边磁铁22和边导磁板28之间设有磁间隙，音圈30的端部位于磁间隙内。
如图1和图2共同所示，磁轭20与外壳10之间设有定位结构，定位结构优选设置在微 型发声器的角部，定位结构包括设置在磁轭20的角部的定位缺口202和设置在外壳10下端面的角部并与定位缺口202相适配的定位凸台120。定位缺口202由两条直边垂直构成，定位凸台120与定位缺口202的两条直边相接触的侧边也为两条直边，且该两条直边相互垂直，形成至少具有一个直角的凸台。定位结构设有至少两个，若定位结构设有两个的话，两定位结构应对角设置，本实施方式优选定位结构设有四个，分布在微型发声器的四个角部。即定位缺口202设有四个，四个定位缺口202分别设置在磁轭20的四个角部，相应的定位凸台120也设有四个，四个定位凸台120分别设置在外壳10的四个角部。由于外壳10的位于一侧短边两端的两个角部上需要设置焊盘50，故本实施方式中的磁轭非对称结构，故定位结构设置的位置也为非对称结构，位于设有焊盘50的短边上的两个定位结构设置在焊盘50的内侧，位于另一短边上的两个定位结构设置在该侧短边的端部。
如图2、图3和图4共同所示，本实施方式中定位缺口202的两条直边相连接的部位设有向内凹陷的过渡缺口204，定位凸台120的两条直边形成的直角部插入到过渡缺口204内。过渡缺口204设有至少两个，该两个过渡缺口204应设置在对角的两个定位缺口202上，本实施方式优选过渡缺口204设有四个，四个过渡缺口204分别设置在四个定位缺口202上。
如图3和图4共同所示，本实施方式优选过渡缺口204由定位缺口的两条直边同时向内凹陷形成，实际应用中过渡缺口204也可以由两条直边中的一条直边向内凹陷形成，只要能容纳定位凸台120的直角部就可以，可以有效的增加定位凸台120的直边长度，能够大大的提高定位效果。
如图3和图4共同所示，本实施方式中过渡缺口204为规则的半圆形，实际应用中过渡缺口204可以采用规则的半圆形、方形或椭圆形等，也可以采用非规则的形状，只要是能容纳定位凸台120的直角部位均可。
如图1所示，磁轭20的内侧对应音圈30的音圈引线300的折弯的部位设有凹陷的避让槽200，避让槽200能够避免音圈引线300与磁轭20发声碰撞，有利于提高微型发声器的声音质量。
如图1和图2共同所示，外壳10的上端结合有防护盖40，防护盖40的中部设有出声孔42，振动系统发出的声音由出声孔42向外辐射。防护盖40的至少相对的两侧边缘部位设有向下延伸的扣合部44，本实施方式中优选防护盖40的四侧边缘部均设有扣合部44。扣合部44上设有向内凸起的内凹卡扣440，内凹卡扣440卡在外壳10的边缘处，从而实现防护盖40与外壳10的结合。
如图1所示，外壳10的侧壁上对应各边磁铁22的部位均设有安装槽14，安装槽14在水平方向上贯穿外壳10的侧壁的内外两侧，各边磁铁22分别固定在相应的安装槽14内。
本申请通过在磁轭的定位缺口处设置过渡缺口，有效的增加了定位凸台的直边长度，从而能够在x轴和y轴方向上起到更好的定位作用，大大的提高了微型发声器的同心度，提高了微型发声器的声学性能。
本说明书仅是以上述结构的微型发声器为例对本申请的技术方案进行举例说明，实际应用中本申请的技术方案并不仅限于上述结构的微型发声器中，其可应用于任何一种具有平板结构的磁轭的微型发声器中，本领域的技术人员根据上述实施例的阐述，不需要付出任何创造性的劳动就可以将本申请的技术方案应用到其它结构的微型发声器中，故无论微型发声器的其它结构是否与上述实施例的相同，只要是在磁轭的定位缺口的角部设置过渡缺口用于容纳定位凸台的角部，从而增加起到定位作用的直边的长度，用于提高定位效果的产品均落入本申请的保护范围内。
本申请不局限于上述具体的实施方式，本领域的普通技术人员从上述构思出发，不经过创造性的劳动，所做出的种种变换，均落在本申请的保护范围之内。

Claims (10)

  1. 一种微型发声器，包括外壳及收容在所述外壳内的振动系统和磁路系统，所述磁路系统包括板状的磁轭，所述磁轭的中心部依次设有中心磁铁和中心导磁板，所述磁轭的边缘部位依次设有边磁铁和边导磁板，所述磁轭固定在所述外壳的下端部，其特征在于，所述磁轭的角部设有由两条直边垂直构成的定位缺口，所述外壳的下端设有与所述定位缺口相配合的也由两条直边垂直构成的定位凸台，所述定位缺口的两条直边相连接的部位设有向内凹陷的过渡缺口，所述定位凸台的两条直边形成的直角插入到所述过渡缺口内；所述过渡缺口设有至少两个，并对角设置。
  2. 根据权利要求1所述的微型发声器，其特征在于，所述定位缺口设有四个，四个所述定位缺口分别设置在所述磁轭的四个角部，四个所述定位缺口上均设有所述过渡缺口。
  3. 根据权利要求2所述的微型发声器，其特征在于，所述过渡缺口由所述定位缺口的两条直边中的一条直边向内凹陷形成。
  4. 根据权利要求2所述的微型发声器，其特征在于，所述过渡缺口由所述定位缺口的两条直边同时向内凹陷形成。
  5. 根据权利要求3或4所述的微型发声器，其特征在于，所述过渡缺口为规则形状或不规则形状。
  6. 根据权利要求5所述的微型发声器，其特征在于，所述过渡缺口为半圆形、方形或椭圆形。
  7. 根据权利要求1所述的微型发声器，其特征在于，所述磁轭上对应所述振动系统的音圈的音圈引线折弯的部位设有凹陷的避让槽。
  8. 根据权利要求1所述的微型发声器，其特征在于，所述外壳的上端结合有防护盖，所述防护盖的中部设有出声孔。
  9. 根据权利要求8所述的微型发声器，其特征在于，所述防护盖的至少相对的两侧边缘部位设有向下延伸的扣合部，所述扣合部上设有向内凸起的内凹卡扣，所述内凹卡扣卡合在所述外壳的侧壁上。
  10. 根据权利要求1所述的微型发声器，其特征在于，所述外壳的侧壁上对 应各所述边磁铁的位置设有贯穿所述侧壁内外两侧的安装槽，所述边磁铁固定在所述安装槽内。
PCT/CN2017/096851 2017-05-08 2017-08-10 微型发声器 Ceased WO2018205440A1 (zh)

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CN206807757U (zh) * 2017-05-08 2017-12-26 歌尔股份有限公司 微型发声器
CN110418256B (zh) * 2018-04-27 2022-03-11 歌尔股份有限公司 发声装置单体、发声模组及电子终端
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