WO2014000343A1 - 电声换能器及其制造方法 - Google Patents

电声换能器及其制造方法 Download PDF

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Publication number
WO2014000343A1
WO2014000343A1 PCT/CN2012/081703 CN2012081703W WO2014000343A1 WO 2014000343 A1 WO2014000343 A1 WO 2014000343A1 CN 2012081703 W CN2012081703 W CN 2012081703W WO 2014000343 A1 WO2014000343 A1 WO 2014000343A1
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WO
WIPO (PCT)
Prior art keywords
sub
shell
electroacoustic transducer
elastic piece
bent
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Legal status (The legal status 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 status listed.)
Ceased
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PCT/CN2012/081703
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English (en)
French (fr)
Inventor
江超
苗青
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Goertek Inc
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Goertek Inc
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Publication date
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Priority to KR1020147036407A priority Critical patent/KR101614328B1/ko
Priority to US14/411,085 priority patent/US9369807B2/en
Publication of WO2014000343A1 publication Critical patent/WO2014000343A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/04Construction, mounting, or centering of coil
    • H04R9/046Construction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006Interconnection of transducer parts
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/11Aspects regarding the frame of loudspeaker transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details

Definitions

  • Electroacoustic transducer and manufacturing method thereof are Electroacoustic transducer and manufacturing method thereof
  • the present invention relates to the field of electroacoustics, and in particular to an electroacoustic transducer and a method of fabricating the same. Background technique
  • the elastic piece of the electroacoustic transducer is combined with the housing mainly by snapping or injection molding.
  • the shrapnel and the casing are combined by the snapping method, the shrapnel is easily deflected, and the fixing is not firm, and the assembly process is complicated; and the injection molding method is combined, the process is simple and the combination is stable.
  • the joint portion of the elastic piece is injection-molded with the casing, and the joint portion is a portion of the elastic piece combined with the casing, and the combination is combined.
  • One end of the rear sheet-shaped elastic piece is exposed at the edge of the casing, and then the elastic piece is bent from the edge of the casing, and is bent to form a bent portion of the elastic piece, and the bent portion can be elastically deformed to make the elastic elasticity of the elastic piece and the end product.
  • the present invention provides an electroacoustic transducer and a method of manufacturing the same, which can save installation space of an electroacoustic transducer and facilitate miniaturization of the product.
  • the present invention provides an electroacoustic transducer comprising a spring piece and a housing, the spring piece being used for electrically connecting an internal circuit and an external circuit of the electroacoustic transducer, wherein the housing is hollow An annular structure formed by fixedly engaging the first sub-shell and the second sub-shell; the elastic piece portion is injection-molded with the first sub-shell, and is disposed at an end of the first sub-shell adjacent to the second sub-shell a bonding surface joined to the second sub-shell, the elastic piece being exposed on the bonding surface and bent at the bonding surface to form a bent portion; corresponding to the bending on the second sub-shell
  • the position of the department is provided with the avoidance of the bent portion
  • the relief structure, the bent portion is located inside the edge of the housing.
  • the first sub-shell and the second sub-shell form a step-like relief structure at the joint surface.
  • a portion of the first sub-shell adjacent to the bonding surface is provided with a first end surface in a horizontal direction
  • a portion of the second sub-shell adjacent to the bonding surface is provided with a second end surface in a horizontal direction.
  • the plane of the first end surface is higher than the plane where the second end surface is located, and the bent portion is located at an upper side of the second end surface.
  • the elastic piece includes a joint portion, a deformation portion, and a free end portion, wherein the joint portion is configured to fix the elastic piece to the housing, and the deformation portion and the joint portion are Connected, the free end is located at the end of the deformation portion.
  • the end portion of the joint portion is provided with a land, and the land is exposed on an inner side surface of the casing.
  • a manufacturing method for manufacturing an electroacoustic transducer as described above comprising the following steps: Step 1: positioning a shrapnel of a sheet-like structure formed by stamping, corresponding to injection molding of the shrapnel with the first sub-shell Filling the rubber at a partial position to form a first sub-shell;
  • Step two injection molding to form a second sub-shell
  • Step three the first sub-shell and the second sub-shell are fixedly joined together to form a hollow annular structure of the casing;
  • the elastic piece of the sheet-like structure is bent from the joint surface of the end portion of the first sub-shell to form a bent portion.
  • first sub-shell and the second sub-shell are fixedly joined at the joint surface by gluing or ultrasonic welding.
  • first sub-shell and the second sub-shell are fixedly joined at the joint surface by snapping or lamination.
  • the present invention firstly combines the elastic piece with the first sub-shell and then bends the elastic piece, and then combines the first sub-shell with the second sub-shell, and the electro-acoustic exchange
  • the energy device and the manufacturing method thereof can effectively control the occupied space of the shrapnel, thereby saving the installation space when the electroacoustic transducer and the terminal product are assembled, and facilitating the miniaturization of the terminal product.
  • one or more aspects of the present invention include the details which will be described later Features that are specified and particularly indicated in the claims.
  • FIG. 1 is a schematic perspective view of an electroacoustic transducer of the present invention
  • Figure 2 is a schematic enlarged view of the portion A shown in Figure 1;
  • FIG. 3 is a schematic view showing the assembled structure of the first step of the manufacturing method of the electroacoustic transducer of the present invention
  • FIG. 4 is a schematic view showing the assembled structure of the second step of the manufacturing method of the electroacoustic transducer of the present invention
  • Rear perspective structure diagram Rear perspective structure diagram.
  • the electroacoustic transducer includes a vibration system, a magnetic circuit system, and a housing 2 housing a fixed vibration system and a magnetic circuit system, wherein the housing 2 is a hollow annular structure; the vibration system includes a vibration The membrane and the voice coil coupled to the side of the diaphragm close to the magnetic circuit system, the magnetic circuit system includes a washer, a magnet and a basin frame 3 which are sequentially combined, and the magnetic circuit system forms a magnetic gap for accommodating the voice coil.
  • the electroacoustic transducer further includes a spring piece 1 combined with the casing 2, and the elastic piece 1 is electrically connected to an internal circuit and an external circuit of the electroacoustic transducer.
  • the elastic piece 1 is coupled to the bottom of the casing 2.
  • the elastic piece 1 is provided with a deformation portion 12, and the deformation portion 12 can be elastically deformed and electrically connected to an external circuit.
  • the deformation portion 12 and the basin are formed.
  • the bottom wall of the frame 3 is located on the same side of the casing 2, but is not limited to this case.
  • the housing 2 is fixedly joined by the first sub-casing 21 and the second sub-case 22.
  • the part of the elastic piece 1 is combined with the first sub-shell 21 by injection molding, and the first sub-shell 21 is adjacent to the second sub-shell.
  • the end portion joined to the second sub-case 22 is provided with a joint surface 212.
  • the elastic piece 1 is exposed from the joint surface 212 and bent to form a bent portion 121.
  • the second casing 22 needs to provide a relief space for the bent portion 121.
  • the first sub-shell 21 and the second sub-shell 22 form a stepped structure at the joint surface 212.
  • the first sub-shell 21 is horizontally disposed adjacent to the joint surface 212.
  • a first end surface 211 of the direction, a second end surface 221 of the second sub-shell 22 adjacent to the bonding surface 212 is disposed in a horizontal direction, wherein the plane of the first end surface 211 is higher than the plane of the second end surface 221, the structure
  • the elastic piece 1 can be exposed from the opposite upper side of the joint surface 212, and the bent portion 121 is located at the upper side portion of the second end surface 221, thereby providing a relief space for the bent portion 121 of the elastic piece 1.
  • the bent portion 121 is located inside the edge 20 of the casing 2.
  • the escaping structure is not limited to the above structure, and the elastic piece 1 can be bent from the joint surface 212.
  • the elastic piece 1 includes: a joint portion 11 for fixedly engaging with the casing 2, a deformation portion 12 connecting the joint portion 11, a land 111 at the end portion of the joint portion 11, and an end portion of the deformation portion 12 Free end 13.
  • the manufacturing method of the electroacoustic transducer is as follows:
  • the elastic piece 1 is positioned.
  • the first sub-shell 21 is formed by filling the rubber material at a position corresponding to the joint portion 11 of the elastic piece 1, so that the elastic piece 1 and the first sub-shell 21 are combined by injection molding, wherein one side of the land 111 is exposed on the surface of the first sub-shell 21.
  • Step two injection molding to form a second sub-shell 22;
  • step three the first sub-shell 21 and the second sub-shell 22 are fixedly joined together.
  • the sheet-like elastic piece 1 is bent from the joint surface 212 of the first sub-shell 21, that is, the deformation portion 12 is bent from the end located at the joint surface 212.
  • the bent portion 121 is formed.
  • the free end portion 13 is bent so that the free end portion 13 is freely coupled to the casing 2.
  • the first sub-shell 21 and the second sub-shell 22 are joined at the joint surface 212, and may be adopted.
  • the colloidal bonding is joined by ultrasonic welding or by means of snapping or lamination.
  • the housing 2 is divided into a first sub-shell 21 and a second sub-shell 22, and firstly, the elastic piece 1 is injection-molded with the first sub-shell 21, and the elastic piece 1 is bent, and then the first sub-shell 21 and the second sub-shell are further 22, this design can control the position of the elastic piece 1 to be bent and the size of the elastic piece 1 by controlling the ratio of the first sub-shell 21 and the second sub-shell 22, and the bent portion 121 of the elastic piece 1 is located at the edge 20 of the casing 2.
  • the inner side can reduce the space occupied by the elastic piece 1, which is beneficial to the space saving of the electroacoustic transducer and the terminal product assembly, and is advantageous for miniaturization of the terminal product.

Landscapes

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

Description

说 明 书
电声换能器及其制造方法
技术领域
本发明涉及电声领域, 具体涉及一种电声换能器及其制造方法。 背景技术
现有技术中, 电声换能器的弹片与壳体主要通过卡扣或注塑方式结合。, 但是弹片与壳体通过卡扣方式结合时弹片容易偏斜, 而且固定不牢固, 组装 的工艺复杂; 而采用注塑方式结合, 工艺简单而且结合稳定。
对于弹片与壳体通过注塑方式结合的结构, 现有技术中将弹片成型为片 状结构后, 再将弹片的结合部与壳体注塑结合, 结合部为弹片上与壳体结合 的部分, 结合后片状弹片的一端露出于壳体的边缘, 然后将弹片从壳体边缘 处进行弯折, 弯折后形成弹片的弯折部, 弯折部可以发生弹性形变使弹片与 终端产品的电路弹性接触实现电连接。
但是, 在现有的这种结构中, 弹片在边缘处进行弯折时弯折部具有一定 弧度, 必然会凸出于壳体的边缘, 这无疑增大了电声换能器的体积, 使电声 换能器与终端产品安装时容易浪费终端产品的空间, 不利于终端产品的微型 化。 因此, 有必要对这种结构的电声换能器进行改进, 以避免上述缺陷。 发明内容
为了解决上述技术问题, 本发明提供一种电声换能器及其制造方法, 可 以节省电声换能器的安装空间, 有利于产品的微型化。
为了实现上述目的, 本发明提供一种电声换能器, 包括弹片和壳体, 所 述弹片用于电连接电声换能器的内部电路和外部电路, 其中, 所述壳体为中 空的环状结构, 由第一子壳和第二子壳固定接合形成; 所述弹片部分与所述 第一子壳注塑结合, 在所述第一子壳靠近所述第二子壳的端部设有与所述第 二子壳接合的结合面, 所述弹片露出于所述结合面并在所述结合面处弯折形 成弯折部; 在所述第二子壳上对应于所述弯折部的位置设有避让所述弯折部 的避让结构, 所述弯折部位于所述壳体边缘的内侧。
此外, 优选的方案是, 所述第一子壳与所述第二子壳在所述结合面处形 成台阶状避让结构。
此外, 优选的方案是, 所述第一子壳靠近所述结合面的部分设有水平方 向的第一端面, 所述第二子壳靠近所述结合面的部分设有水平方向的第二端 面, 所述第一端面所在的平面高于所述第二端面所在的平面, 并且所述弯折 部位于所述第二端面的上侧。
此外, 优选的方案是, 所述弹片包括结合部、 形变部和自由端部, 其中, 所述结合部用于将所述弹片与所述壳体固定结合, 所述形变部与所述结合部 连接, 所述自由端部位于所述形变部的端部。
此外, 优选的方案是, 所述结合部的端部设有焊盘, 所述焊盘露出于所 述壳体的内侧表面。
一种制造如上所述电声换能器的制造方法, 其中, 包括如下步骤: 步骤一, 将冲压形成的片状结构的弹片进行定位, 对应所述弹片与所述 第一子壳注塑结合的部分位置加注胶料形成第一子壳;
步骤二, 注塑形成第二子壳;
步骤三, 将第一子壳和第二子壳固定接合为一体, 形成中空的环状结构 的壳体;
其中, 在步骤三之前将片状结构的所述弹片从所述第一子壳端部的所述 结合面处进行弯折形成弯折部。
此外, 优选的方案是, 所述第一子壳和所述第二子壳通过涂胶或超声波 焊接的方式在所述结合面处固定接合。
此外, 优选的方案是, 所述第一子壳和所述第二子壳通过卡扣或压膜的 方式在所述结合面处固定接合。
采用上述技术方案后, 与传统结构相比, 本发明先将弹片与第一子壳注 塑结合后将弹片进行弯折, 然后再将第一子壳与第二子壳结合, 这种电声换 能器及其制造方法可以有效的控制弹片的占用空间, 从而有利于节省电声换 能器与终端产品装配时的安装空间, 有利于终端产品的微型化。 为了实现上述以及相关目的, 本发明的一个或多个方面包括后面将详细 说明并在权利要求中特别指出的特征。 下面的说明以及附图详细说明了本发 明的某些示例性方面。 然而, 这些方面指示的仅仅是可使用本发明的原理的 各种方式中的一些方式。 此外, 本发明旨在包括所有这些方面以及它们的等 同物。 附图说明 通过参考以下结合附图的说明及权利要求书的内容, 并且随着对本发明 的更全面理解, 本发明的其它目的及结果将更加明白及易于理解。 在附图中: 图 1是本发明电声换能器的立体结构示意图;
图 2是图 1所示 A部分的放大结构示意图;
图 3是本发明电声换能器的制造方法步骤一的组装结构示意图; 图 4是本发明电声换能器的制造方法步骤二的组装结构示意图; 图 5是本发明壳体与弹片组装后的立体结构示意图。
在所有附图中相同的标号指示相似或相应的特征或功能。 具体实施方式
在下面的描述中, 出于说明的目的, 为了提供对一个或多个实施例的全 面理解, 阐述了许多具体细节。 然而, 很明显, 也可以在没有这些具体细节 的情况下实现这些实施例。 在其它例子中, 为了便于描述一个或多个实施例, 公知的结构和设备以方框图的形式示出。 以下将结合附图对本发明的具体实施例进行详细描述。
图 1 和图 2示出了根据本发明实施例的电声换能器的立体结构示意图。 如图 1和图 2所示, 电声换能器包括振动系统、 磁路系统以及收容固定振动 系统和磁路系统的壳体 2, 其中壳体 2为中空的环状结构; 振动系统包括振膜 和结合于振膜靠近磁路系统一侧的音圈, 磁路系统包括依次结合的华司、 磁 铁和盆架 3, 磁路系统形成收容音圈的磁间隙。此外, 电声换能器还包括与壳 体 2结合的弹片 1, 弹片 1电连接电声换能器的内部电路和外部电路。
本实施例中, 弹片 1结合于壳体 2的底部, 弹片 1设有形变部 12, 形变 部 12可以发生弹性形变并与外部电路电连接, 本实施例中, 形变部 12与盆 架 3的底壁位于壳体 2相同的一侧, 但不限于这种情况。
本实施例中, 壳体 2由第一子壳 21和第二子壳 22固定接合形成, 弹片 1 的一部分与第一子壳 21通过注塑方式结合, 第一子壳 21靠近第二子壳的并 且与第二子壳 22接合的端部设有结合面 212, 弹片 1从结合面 212处露出并 弯折形成弯折部 121, 第二壳体 22需要为弯折部 121提供避让空间。
本实施例中, 第一子壳 21与第二子壳 22在结合面 212处形成台阶状结 构, 如图 1和图 2所示, 第一子壳 21上靠近结合面 212的位置设有水平方向 的第一端面 211, 第二子壳 22上靠近结合面 212的位置设有水平方向的第二 端面 221, 其中第一端面 211所在的平面高于第二端面 221所在的平面, 这种 结构可以使弹片 1从结合面 212的相对上侧露出, 并且弯折部 121位于第二 端面 221的上侧部分, 从而为弹片 1的弯折部 121提供了避让空间。 如 1图 所示, 弹片 1弯折后, 弯折部 121位于壳体 2的边缘 20的内侧。
需要说明的是, 避让结构不限于上述结构, 使弹片 1 能够从结合面 212 处弯折即可。
图 3〜图 5示出了根据本发明电声换能器的制造方法的组装结构示意图。 如图 3所示, 弹片 1包括: 用于与壳体 2固定结合的结合部 11, 连接结合部 11的形变部 12, 位于结合部 11端部的焊盘 111, 以及位于形变部 12端部的 自由端部 13。
如图 3至图 5所示, 电声换能器的制造方法如下:
步骤一, 将弹片 1成型为片状结构后, 将弹片 1进行定位。 在对应于弹 片 1结合部 11的位置加注胶料形成第一子壳 21, 使弹片 1与第一子壳 21通 过注塑方式结合, 其中焊盘 111的一面露出于第一子壳 21的表面用于与电声 换能器音圈的引线电连接;
步骤二, 注塑形成第二子壳 22;
步骤三, 将第一子壳 21和第二子壳 22固定接合为一体。
其中在步骤三之前, 即在上述步骤二之前或步骤二之后将片状的弹片 1 从第一子壳 21的结合面 212处弯折, 即将形变部 12从位于结合面 212的一 端处弯折形成弯折部 121。此外, 对自由端部 13进行弯折使自由端部 13与壳 体 2自由结合。
步骤三中, 第一子壳 21与第二子壳 22在结合面 212处接合, 可以采用 胶体粘结接合, 采用超声波焊接的方式接合, 或者通过卡扣或压膜等方式接 合。 壳体 2与弹片 1组装完成后, 将电声换能器的磁路系统和振动系统与壳 体 2固定结合。
壳体 2分为第一子壳 21和第二子壳 22, 并且首先将弹片 1与第一子壳 21注塑结合后将弹片 1弯折, 然后再将第一子壳 21与第二子壳 22结合, 这 种设计可以通过控制第一子壳 21和第二子壳 22的比例来控制弹片 1弯折的 位置和弹片 1的大小, 并且弹片 1的弯折部 121位于壳体 2边缘 20的内侧, 从而可以减小弹片 1 占用的空间, 有利于电声换能器与终端产品装配时空间 的节约, 有利于实现终端产品的微型化。 在本发明的上述教导下, 本领域技术人员可以在上述实施例的基础上进 行其他的改进和变形, 而这些改进和变形, 都落在本发明的保护范围内, 本 领域技术人员应该明白, 上述的具体描述只是更好的解释本发明的目的, 本 发明的保护范围由权利要求及其等同物限定。

Claims

权 利 要 求 书
1、 一种电声换能器, 包括弹片和壳体, 所述弹片用于电连接电声换能器 的内部电路和外部电路, 其特征在于,
所述壳体为中空的环状结构, 由第一子壳和第二子壳固定接合形成; 所述弹片部分与所述第一子壳注塑结合, 在所述第一子壳靠近所述第二 子壳的端部设有与所述第二子壳接合的结合面, 所述弹片露出于所述结合面 并在所述结合面处弯折形成弯折部; 所述第二子壳上对应于所述弯折部的位 置设有避让所述弯折部的避让结构, 所述弯折部位于所述壳体边缘的内侧。
2、 根据权利要求 1所述的电声换能器, 其特征在于,
所述第一子壳与所述第二子壳在所述结合面处形成台阶状避让结构。
3、 根据权利要求 2所述的电声换能器, 其特征在于,
所述第一子壳靠近所述结合面的部分设有水平方向的第一端面, 所述第 二子壳靠近所述结合面的部分设有水平方向的第二端面, 所述第一端面所在 的平面高于所述第二端面所在的平面; 并且,
所述弯折部位于所述第二端面的上侧。
4、 根据权利要求 2或 3所述的电声换能器, 其特征在于,
所述弹片包括结合部、 形变部和自由端部, 其中, 所述结合部用于将所 述弹片与所述壳体固定结合, 所述形变部与所述结合部连接, 所述自由端部 位于所述形变部的端部。
5、 根据权利要求 4所述的电声换能器。 其特征在于,
在所述结合部的端部设有焊盘, 所述焊盘露出于所述壳体的内侧表面。
6、 一种制造如权利要求 1所述电声换能器的制造方法, 其特征在于, 包 括如下步骤:
步骤一, 将冲压形成的片状结构的弹片进行定位, 对应所述弹片与所述 第一子壳注塑结合的部分位置加注胶料形成第一子壳;
步骤二, 注塑形成第二子壳;
步骤三, 将第一子壳和第二子壳固定接合为一体, 形成中空的环状结构 的壳体;
其中, 在步骤三之前将片状结构的所述弹片从所述第一子壳端部的所述 结合面处进行弯折形成弯折部。
7、 根据权利要求 6所述的电声换能器的制造方法, 其特征在于, 所述第一子壳和所述第二子壳通过涂胶或超声波焊接的方式在所述结合 面处固定接合。
8、 根据权利要求 6所述的电声换能器的制造方法, 其特征在于, 所述第一子壳和所述第二子壳通过卡扣或压膜的方式在所述结合面处固 定结合。
PCT/CN2012/081703 2012-06-27 2012-09-20 电声换能器及其制造方法 Ceased WO2014000343A1 (zh)

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