WO2018058841A1 - 振膜及设有该振膜的微型发声器 - Google Patents

振膜及设有该振膜的微型发声器 Download PDF

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Publication number
WO2018058841A1
WO2018058841A1 PCT/CN2016/113605 CN2016113605W WO2018058841A1 WO 2018058841 A1 WO2018058841 A1 WO 2018058841A1 CN 2016113605 W CN2016113605 W CN 2016113605W WO 2018058841 A1 WO2018058841 A1 WO 2018058841A1
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Prior art keywords
diaphragm
reinforcing member
body portion
edge portion
wrapped
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Ceased
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PCT/CN2016/113605
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English (en)
French (fr)
Inventor
郭晓冬
门春莲
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Goertek Inc
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Goertek Inc
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Publication of WO2018058841A1 publication Critical patent/WO2018058841A1/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
    • 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
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the invention relates to the technical field of electroacoustic products, in particular to a diaphragm and a microphone provided with the diaphragm.
  • Micro-speaker is an important acoustic component in portable electronic equipment. It is used to convert acoustic electric signals into sound signals. It is an energy conversion device. Microspeakers typically include a vibrating system that includes a diaphragm and a voice coil that are joined together, and a vibrating membrane that includes a portion of the diaphragm that is injection molded and bonded to the center of the diaphragm.
  • a diaphragm body portion made of a soft gel material, such as a silica gel diaphragm can be combined between the diaphragm body portion and the diaphragm center portion by an injection molding process, that is, a liquid colloid stock solution and a diaphragm.
  • the center part is cured together by high temperature heating.
  • the diaphragm can not only meet the acoustic performance requirements of the micro-sounder, but also the injection molding combination between the diaphragm body portion and the diaphragm center portion can improve the precision of the micro-sounder assembly and reduce the assembly difficulty.
  • the diaphragm It has become more and more widely used in the field of electro-acoustics, especially in the field of micro-sounders in recent years.
  • the diaphragm body of this material is soft in texture, and the material of the diaphragm center is usually hard.
  • the diaphragm body and the diaphragm center are combined.
  • the phenomenon of cracking, that is, membrane rupture greatly reduces the reliability of the micro-speaker and shortens the service life of the micro-speaker.
  • the first technical problem to be solved by the present invention is to provide a diaphragm which does not suffer from cracking of the diaphragm, improves the reliability of the micro-sounder, and prolongs the service life of the micro-speaker.
  • a second technical problem to be solved by the present invention is to provide a micro-sounder with high reliability and long service life.
  • the technical solution of the present invention is:
  • a diaphragm comprising a diaphragm body portion and a diaphragm center portion that are injection-molded together, the diaphragm center portion being coupled as an insert to a central position of the diaphragm body portion, an edge of the diaphragm center portion At least a portion of the portion in the thickness direction is wrapped in the diaphragm body portion, and a reinforcing member extending laterally beyond the edge portion side surface is integrally or integrally provided on the wrapped edge portion, and the reinforcing member is extended Into the diaphragm body portion.
  • the edge portion has two end surfaces in the up and down direction, at least one of the two end surfaces is wrapped in the diaphragm body portion, and is fixed on the at least one wrapped end surface Describe the reinforcements.
  • the reinforcing member and the central portion of the diaphragm are fixed by gluing, laser welding or hot melt pressing.
  • the central portion of the diaphragm is composed of a plurality of film layers
  • the reinforcing member is an extended portion integrally provided with at least one of the film layers and extending out of the side surface of the edge portion.
  • the reinforcing member is integrally provided with a film layer on the surface of the central portion of the diaphragm; and/or the reinforcing member is integrally provided with a film layer located inside the central portion of the diaphragm.
  • the reinforcing member is a ring structure.
  • the reinforcing member is a discontinuous segment-like structure distributed at the edge portion.
  • the reinforcing member of the segment structure is located at a corner position of the edge portion and/or at a straight edge position of the edge portion.
  • the material of the diaphragm body portion is silica gel.
  • the reinforcing member is made of engineering plastic or thermoplastic elastomer.
  • the engineering plastic comprises at least one of PU, PEEK, PAR, PEI, PI, PPS, PEN, PET and PBT
  • the thermoplastic elastomer comprises styrene, olefin, diene, vinyl chloride At least one of urethanes, esters, amides, organofluorines, silicones, and ethylene-based thermoplastic elastomers.
  • the technical solution of the present invention is:
  • a miniature sound generator comprising a vibration system comprising a diaphragm and a voice coil combined together, the diaphragm being the diaphragm.
  • the diaphragm of the present invention includes the diaphragm body portion and the diaphragm center portion which are injection-molded together, at least a portion of the edge portion of the diaphragm center portion is wrapped in the diaphragm body portion at the wrapped edge portion at the wrapped edge portion.
  • the upper connection or the integral is provided with a reinforcing member extending laterally and beyond the side surface of the edge portion, and the reinforcing member projects into the diaphragm body portion.
  • the reinforcing member functions as a transition between the diaphragm body portion and the diaphragm center portion, and can enhance the tensile force and the stretchability at the joint of the diaphragm body portion and the diaphragm center portion, thereby effectively protecting the place.
  • the diaphragm body part makes the diaphragm body part not cracked badly, and can also adjust the structure according to the tension of the micro-sounder in the vibration, which can effectively improve the reliability and stability of the micro-sounder. Sexuality, extending the life of the micro-speaker.
  • the vibration system of the micro-speaker of the present invention includes the above-mentioned diaphragm, there is no possibility of cracking of the diaphragm, high reliability and stability, and long service life.
  • the diaphragm of the present invention and the micro-speaker provided with the diaphragm solve the technical problem that the diaphragm is easy to be cracked in the prior art, and the diaphragm of the present invention and the diaphragm of the micro-speaker provided with the diaphragm There is no bad cracking, so the micro-sounder has high reliability and stability and long service life.
  • FIG. 1 is a schematic structural view of a diaphragm according to an embodiment of the present invention.
  • Figure 2 is an enlarged view of a portion A of Figure 1;
  • Figure 3 is a structural schematic view showing the central portion of the diaphragm and the reinforcing member of Figure 1 combined;
  • FIG. 4 is a schematic structural view showing a central portion of a diaphragm and a reinforcing member of the diaphragm of the embodiment of the present invention
  • Figure 5 is a schematic view showing another structure of the diaphragm center portion and the reinforcing member of the diaphragm of the embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a three-diaphragm film according to an embodiment of the present invention.
  • Figure 7 is a partial schematic view showing the structure of a four-diaphragm according to an embodiment of the present invention.
  • diaphragm body part 20 diaphragm center part, 30a, reinforcing part, 30b, reinforcing part, 30c, reinforcing part, 30d, reinforcing part.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a diaphragm together with the voice coil, constitutes a vibration system of the microspeaker.
  • the diaphragm includes a diaphragm body portion 10 and a diaphragm center portion 20 that are coupled together, and the diaphragm center portion 20 is coupled as an insert to a central position of the diaphragm body portion 10.
  • the diaphragm body portion 10 and the vibrating portion The film center portions 20 are bonded together by an injection molding process. At least a part of the diaphragm center portion 20 is wrapped in the diaphragm body portion 10 in the thickness direction.
  • the upper end surface of the edge portion of the diaphragm center portion 20 is wrapped in the diaphragm body portion 10, that is, the diaphragm center portion.
  • the edge of the upper surface of the diaphragm 20 is wrapped in the diaphragm body portion 10, and the lower surface of the diaphragm center portion 20 is exposed outside the diaphragm body portion 10.
  • the reinforcing member 30a is fixedly coupled to the upper end surface of the edge portion of the diaphragm center portion 20, that is, the edge portion of the diaphragm center portion 20 wrapped around the diaphragm body portion 10 is coupled with the reinforcing member 30a, and the reinforcing member 30a
  • the side surface extending laterally beyond the edge portion of the diaphragm center portion 20 extends into the diaphragm body portion 10.
  • the reinforcing member 30a functions as a transition between the diaphragm main body portion 10 and the diaphragm center portion 20, and can increase the tensile force and the stretchability, and effectively prevent the separation from the diaphragm center portion 20 and the diaphragm body portion 10. , that is, to prevent cracking of the diaphragm.
  • the material of the diaphragm main body portion 10 is a soft gel.
  • the diaphragm body portion 10 is preferably made of a silicone material, and the reinforcing member 30a may be made of a conventional diaphragm material such as an engineering plastic. Or a thermoplastic elastomer.
  • the preferred engineering plastics in the present embodiment include PET (polyethylene terephthalate), PEEK (polyetheretherketone), PAR (Polyarylate), PEI (Polyetherimied) Ether imide), PI (Polyimide, polyimide), PPS (Polyphenylene sulfide, polyphenylene sulfide), PEN (Polyethylene naphthalate two formic acid glycol, polyethylene naphthalate), PBT (polybutylene terephthalate) At least one of polybutylene terephthalate and PU (polyurethane), but is not limited to the above materials.
  • the thermoplastic elastomer includes at least one of styrenes, olefins, dienes, vinyl chlorides, urethanes, esters, amides, organic fluorines, silicones, and ethylene-based thermoplastic elastomers. Limited to the above several.
  • the reinforcing member 30a has a sheet-like structure, and a portion fixed to the diaphragm center portion 20 is superimposed on the upper side surface of the diaphragm center portion 20, and is passed through the backing. Glue bonding, laser welding or hot melt pressing is fixed on the upper surface of the diaphragm center portion 20.
  • the shape of the reinforcing member 30a can be designed according to the magnitude of the tensile force that the diaphragm receives during vibration.
  • the shape of the reinforcing member 30a is a closed ring shape at a position around the center portion 20 of the diaphragm, that is, It is surrounded by the edge of the central portion 20 of the diaphragm.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment is basically the same as the first embodiment, and the difference is that:
  • the reinforcing member is a discontinuous segment-like structure that is laid along the edge portion of the central portion of the diaphragm.
  • the reinforcing member 30b has an arc-shaped structure, and four segments are provided in total, and the four-segment reinforcing members 30b are respectively located at the four corner portions of the diaphragm center portion 20.
  • the reinforcing member 30c has a linear structure, and four segments are provided in total, and the four-segment reinforcing members 30c are respectively located at the four straight sides of the diaphragm center portion 20.
  • the embodiment in which the reinforcing member is a discontinuous segment-like structure is not limited to the above two types, and may be distributed at the corner position and the straight side position of the central portion of the diaphragm at the same time, or at a partial angle of the center portion of the diaphragm. Part position and / or part of the straight edge position and so on.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment is basically the same as the first embodiment or the second embodiment, and the difference is:
  • the edge portion of the diaphragm center portion 20 is wrapped in the diaphragm body portion 10, that is, the upper and lower end surfaces of the edge portion of the diaphragm center portion 20 are wrapped in the diaphragm body portion.
  • the strong member 30a is fixed to one of the end surfaces thereof.
  • the reinforcing member may be fixed on both the upper and lower end surfaces of the edge portion of the central portion of the diaphragm, and the reinforcing members on both end faces are better in preventing cracking of the diaphragm.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • This embodiment is basically the same as the first embodiment, the second embodiment, or the third embodiment, and the difference is:
  • the diaphragm center portion 20 is composed of a plurality of film layers, and the reinforcing member 30d is integrally provided with one of the film layers, and the film layer extends from the extending portion of the side surface of the edge portion.
  • the reinforcing member 30d shown in FIG. 7 and the diaphragm center portion 20 are integrally formed on the surface layer of the diaphragm layer.
  • the reinforcing member may also be integrated with the film layer located in the intermediate layer; Limited to one layer, it is also possible to jointly extend a plurality of layers or a plurality of layers which are spaced apart by a plurality of film layers.
  • the diaphragm of the invention provides a reinforcing member at the edge of the central portion of the diaphragm, which greatly enhances the tensile force and the stretchability of the diaphragm at the position, and effectively prevents the diaphragm body from being in contact with the central portion of the diaphragm. Poor cracking in the joints ensures the reliability and stability of the micro-speaker and prolongs the service life of the micro-speaker.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • a miniature sound generator includes a casing in which a vibration system and a magnetic circuit system are housed and fixed, and the vibration system includes a diaphragm and a voice coil combined.
  • the diaphragm is the diaphragm described in any one of Embodiments 1 to 4.
  • the micro-speaker of the present invention employs the diaphragms described in the first embodiment to the fourth embodiment, the diaphragm is not easily cracked, has high reliability and stability, and has a long service life.
  • the technical solution of providing the reinforcing member at the edge position of the central portion of the diaphragm is exemplified in detail by taking the diaphragm and the micro-speaker of the above structure as an example. In practical applications, the technical solution is not only suitable for the above structure.
  • Diaphragm and micro-sounder which can be applied to any diaphragm and micro-sounder made of soft rubber and combined with the center of the diaphragm through injection molding process, such as round, square, runway
  • the technical solution of the present invention can be applied to the diaphragm and the micro-sounder of other structures without any creative work, so whether the other structures of the diaphragm and the micro-sounder are Similar to the structure of the diaphragm and the micro-speaker in the above embodiment, as long as the reinforcing member is fixed at the edge of the center portion of the diaphragm, the diaphragm and the micro-sounder for preventing cracking of the diaphragm are all included in the present invention.
  • the reinforcing member is fixed at the edge of the center portion of the diaphragm
  • the diaphragm and the micro-sounder for preventing cracking of the diaphragm are all included in the present invention.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本发明公开了一种振膜及设有该振膜的微型发声器，涉及电声产品技术领域，振膜包括注塑结合在一起的振膜本体部与振膜中心部，所述振膜中心部作为嵌件结合于所述振膜本体部的中央位置，所述振膜中心部的边缘部在厚度方向上的至少部分被包裹在所述振膜本体部中，在被包裹的边缘部上连接或一体设有横向延伸且超出边缘部侧表面的补强件，所述补强件伸入至所述振膜本体部中。本发明振膜及设有该振膜的微型发声器解决了现有技术中振膜易开裂的技术问题，本发明振膜及设有该振膜的微型发声器的振膜不容易开裂，从而微型发声器的可靠性和稳定性高，使用寿命长。

Description

振膜及设有该振膜的微型发声器 技术领域
本发明涉及电声产品技术领域，特别涉及一种振膜及设有该振膜的微型发声器。
背景技术
微型发声器是便携式电子设备中一种重要的声学部件，用于将声波电信号转换成声音信号传出，是一种能量转换器件。微型发声器通常包括振动系统和磁路系统，振动系统包括结合在一起的振膜和音圈，其中振膜包括注塑结合在一起的振膜本部与振膜中心部。
目前出现了由柔软的胶体材料制成的振膜本体部，如硅胶振膜，此种材质的振膜本体部与振膜中心部之间可通过注塑工艺结合，即将液态的胶体原液与振膜中心部一起经过高温加热固化成型。此种振膜不仅能够满足微型发声器的声学性能要求，而且振膜本体部与振膜中心部之间的注塑结合能够提高微型发声器组装的精度，降低了组装难度，因此，此种振膜在电声领域应用越来越广泛，尤其是近几年在微型发声器领域里占比不断的增加。然而此种材质的振膜本体部质地较软，而振膜中心部的材质通常均较硬，二者结合在一起作为振膜在长期振动后，会出现振膜本体部与振膜中心部结合处开裂的现象，也就是破膜，大大的降低了微型发声器的可靠性，缩短了微型发声器的使用寿命。
发明内容
针对以上缺陷，本发明所要解决的第一个技术问题是提供一种振膜，此振膜不会出现振膜开裂的不良，可提高微型发声器的可靠性，延长微型发声器的使用寿命。
基于一个发明构思，本发明所要解决的第二个技术问题是提供一种微型发声器，此微型发声器可靠性高，使用寿命长。
为解决上述第一个技术问题，本发明的技术方案是：
一种振膜，包括注塑结合在一起的振膜本体部与振膜中心部，所述振膜中心部作为嵌件结合于所述振膜本体部的中央位置，所述振膜中心部的边缘部在厚度方向上的至少部分被包裹在所述振膜本体部中，在被包裹的边缘部上连接或一体设有横向延伸且超出边缘部侧表面的补强件，所述补强件伸入至所述振膜本体部中。
其中，所述边缘部具有上下方向上的两个端表面，两个所述端表面中的至少一个包裹在所述振膜本体部中，在至少一个被包裹的所述端表面上固定有所述补强件。
其中，所述补强件与所述振膜中心部通过胶粘、激光焊接或热熔压合方式固定。
其中，所述振膜中心部由多个膜层复合构成，所述补强件为与至少其中一个膜层一体设置且延伸出所述边缘部侧表面的延伸部分。
其中，所述补强件与振膜中心部的位于表面的一个膜层一体设置；和/或者，所述补强件与振膜中心部的位于内部的一个膜层一体设置。
作为一种实施方式，所述补强件为环状结构。
作为另一种实施方式，所述补强件为分布在所述边缘部的不连续的段状结构。
其中，所述段状结构的补强件位于所述边缘部的角部位置和/或位于所述边缘部的直边位置。
其中，所述振膜本体部的材质为硅胶。
其中，所述补强件的材质为工程塑料或热塑性弹性体。
其中，所述工程塑料包括PU、PEEK、PAR、PEI、PI、PPS、PEN、PET和PBT中的至少一种，所述热塑性弹性体包括苯乙烯类、烯烃类、双烯类、氯乙烯类、氨酯类、酯类、酰胺类、有机氟类、有机硅类和乙烯类热塑性弹性体中的至少一种。
为解决上述第二个技术问题，本发明的技术方案是：
一种微型发声器，包括振动系统，所述振动系统包括结合在一起的振膜和音圈，所述振膜为上述振膜。
采用了上述技术方案后，本发明的有益效果是：
由于本发明振膜包括注塑结合在一起的振膜本体部和振膜中心部，振膜中心部的边缘部在厚度方向上的至少部分被包裹在振膜本体部中，在被包裹的边缘部上连接或一体设有横向延伸且超出边缘部侧表面的补强件,补强件伸入至振膜本体部中。补强件在振膜本体部与振膜中心部之间起到了过渡的作用，能够增强振膜本体部与振膜中心部相结合处的拉伸力和伸缩性，从而有效的保护了该处的振膜本体部，使得振膜本体部不会出现开裂的不良，同时还可以根据微型发声器在振动中所受的拉力大小进行结构的调整，能够有效的提高微型发声器的可靠性和稳定性，延长微型发声器的使用寿命。
由于本发明微型发声器的振动系统包括上述振膜，因此不会出现振膜开裂的不良，可靠性和稳定性高，使用寿命长。
综上所述，本发明振膜及设有该振膜的微型发声器解决了现有技术中振膜易开裂的技术问题，本发明振膜及设有该振膜的微型发声器的振膜不会出现开裂的不良，从而微型发声器的可靠性和稳定性高，使用寿命长。
附图说明
图1是本发明实施例一振膜的结构示意图；
图2是图1的A部放大图；
图3是图1中振膜中心部和补强件结合在一起的结构示意图；
图4是本发明实施例二振膜的振膜中心部和补强件结合在一起的一种结构示意图；
图5是本发明实施例二振膜的振膜中心部和补强件结合在一起的另一种结构示意图；
图6是本发明实施例三振膜的结构示意图；
图7是本发明实施例四振膜的局部结构示意图；
图中：10、振膜本体部，20、振膜中心部，30a、补强件，30b、补强件，30c、补强件，30d、补强件。
具体实施方式
下面结合附图和实施例，进一步阐述本发明。
本说明书中涉及到的方向上均指振膜出声的一侧，方向下均指相反的一侧。
实施例一：
如图1和图2共同所示，一种振膜，与音圈共同构成微型发声器的振动系统。该振膜包括结合在一起的振膜本体部10和振膜中心部20，振膜中心部20作为嵌件结合在振膜本体部10的中央位置，本实施方式中振膜本体部10与振膜中心部20通过注塑工艺结合在一起。振膜中心部20在厚度方向上的至少一部分包裹在振膜本体部10中，本实施方式中振膜中心部20的边缘部的上端面包裹在振膜本体部10内，即振膜中心部20的上表面的边缘包裹在振膜本体部10内，振膜中心部20的下表面裸露在振膜本体部10的外部。振膜中心部20边缘部的上端面上固定结合有补强件30a，即振膜中心部20包裹在振膜本体部10内的一侧的边缘位置结合有补强件30a，补强件30a横向延伸且超出振膜中心部20边缘部的侧表面，并伸入到振膜本体部10内。补强件30a在振膜本体部10与振膜中心部20之间起到了过渡的作用，能够增加拉伸力和伸缩性，有效的防止了与振膜中心部20与振膜本体部10分离，即防止振膜开裂。
如图1所示，振膜本体部10的材质为柔软的胶体，本实施方式中优选振膜本体部10的材质为硅胶，补强件30a的材质可选用传统的振膜材料，如工程塑料或热塑性弹性体。其中本实施方式中优选的工程塑料包括PET(polyethylene terephthalate，聚对苯二甲酸乙二醇酯)、PEEK(polyetheretherketone，聚醚醚酮)、PAR(Polyarylate，聚芳酯)、PEI(Polyetherimied，聚醚酰亚胺)、PI(Polyimide，聚酰亚胺)、PPS(Polyphenylene sulfide，聚苯硫醚)、PEN(Polyethylene naphthalate two formic acid glycol，聚萘二甲酸乙二醇酯)、PBT(polybutylene terephthalate，聚对苯二甲酸丁二醇酯)和PU(polyurethane，聚氨酯)中的至少一种，但并不限于上述几种材料。热塑性弹性体包括苯乙烯类、烯烃类、双烯类、氯乙烯类、氨酯类、酯类、酰胺类、有机氟类、有机硅类和乙烯类热塑性弹性体中的至少一种，也不限于上述的几种。
如图2和图3共同所示，本实施方式优选补强件30a为薄片状结构，固定在振膜中心部20上的部分是叠加在振膜中心部20的上侧表面上，通过背胶、胶水粘接、激光焊接或热熔压合方式固定在振膜中心部20的上侧表面上。补强件30a的形状可根据振膜在振动中受到的拉伸力大小来设计，本实施方式中优选补强件30a的形状为闭合的环状，位于振膜中心部20的周边位置，即沿着振膜中心部20的边缘环绕一周。
实施例二：
本实施方式与实施例一基本相同，其不同之处在于：
补强件为沿着振膜中心部的边缘部分布的不连续的段状结构。
如图4所示，本实施方式中补强件30b为弧形结构，共设有四段，四段补强件30b分别位于振膜中心部20的四个角部位置。
如图5所示，补强件30c为直线结构，共设有四段，四段补强件30c分别位于振膜中心部20的四段直边位置。
补强件为不连续的段状结构的实施方式并不限于上述的两种，还可以同时分布在振膜中心部的角部位置和直边位置，或是分布在振膜中心部的部分角部位置和/或部分直边位置等。
实施例三：
本实施方式与实施例一或实施例二基本相同，不同之处在于：
如图6所示，振膜中心部20的边缘部包裹在振膜本体部10中，即振膜中心部20的边缘部的上、下两个端表面均包裹在振膜本体部中，补强件30a固定在其中的一个端表面上。
实际应用中也可以在振膜中心部的边缘部的上、下两个端表面上均固定补强件，两个端面上均固定补强件在防止振膜开裂上效果更好。
实施例四：
本实施方式与实施例一、实施例二或实施例三基本相同，其不同之处在于：
如图7所示，振膜中心部20由多个膜层复合构成，补强件30d与其中一个膜层一体设置，为该膜层延伸出边缘部侧表面的延伸部分。
图7中示出的补强件30d与振膜中心部20位于表层的膜层为一体结构，实际应用中补强件也可以与位于中间层的膜层为一体结构；同时补强件也不限于一层，也可以由多个膜层共同延伸出相叠加或相间隔的多层。
本发明振膜通过在振膜中心部的边缘位置设置补强件，大大的增强了振膜在该处的拉伸力和伸缩性，有效的防止了振膜本体部在与振膜中心部相衔接的部位发生开裂的不良，保证了微型发声器的可靠性和稳定性，延长了微型发声器的使用寿命。
实施例五：
一种微型发声器，包括外壳，外壳内收容固定有振动系统和磁路系统，振动系统包括结合在一起的振膜和音圈。振膜为实施例一至实施例四任意一个实施例中描述的振膜。
由于本发明微型发声器采用了实施例一至实施例四中描述的振膜，其振膜不容易开裂，可靠性和稳定性高，使用寿命长。
本说明书仅是以上述结构的振膜和微型发声器为例对本发明在振膜中心部的边缘位置设置补强件的技术方案进行详细的举例说明，实际应用中此技术方案不仅适合于上述结构的振膜和微型发声器，其可适用于任何一种振膜本体部由软胶制成并与振膜中心部通过注塑工艺结合的振膜和微型发声器中，如圆形、正方形、跑道形等，本领域技术人员根据本说明书的描述不需要付出创造性劳动就可以将本发明的技术方案应用到其它结构的振膜及微型发声器中，故无论振膜及微型发声器的其它结构是否与上述实施例中的振膜及微型发声器的结构相同，只要是采用了在振膜中心部的边缘位置固定补强件，用以防止振膜开裂的振膜及微型发声器均落入本发明的保护范围之内。
本发明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，均落在本发明的保护范围内。

Claims (12)

  1. 一种振膜，包括注塑结合在一起的振膜本体部与振膜中心部，所述振膜中心部作为嵌件结合于所述振膜本体部的中央位置，其特征在于，所述振膜中心部的边缘部在厚度方向上的至少部分被包裹在所述振膜本体部中，在被包裹的边缘部上连接或一体设有横向延伸且超出边缘部侧表面的补强件，所述补强件伸入至所述振膜本体部中。
  2. 根据权利要求1所述的一种振膜，其特征在于，所述边缘部具有上下方向上的两个端表面，两个所述端表面中的至少一个包裹在所述振膜本体部中，在至少一个被包裹的所述端表面上固定有所述补强件。
  3. 根据权利要求2所述的一种振膜，其特征在于，所述补强件与所述振膜中心部通过胶粘、激光焊接或热熔压合方式固定。
  4. 根据权利要求1所述的一种振膜，其特征在于，所述振膜中心部由多个膜层复合构成，所述补强件为与至少其中一个膜层一体设置且延伸出所述边缘部侧表面的延伸部分。
  5. 根据权利要求4所述的一种振膜，其特征在于，所述补强件与振膜中心部的位于表面的一个膜层一体设置；和/或者，所述补强件与振膜中心部的位于内部的一个膜层一体设置。
  6. 根据权利要求1至5任一所述的一种振膜，其特征在于，所述补强件为环状结构。
  7. 根据权利要求1至5任一所述的一种振膜，其特征在于，所述补强件为分布在所述边缘部的不连续的段状结构。
  8. 根据权利要求7所述的一种振膜，其特征在于，所述段状结构的补强件位于所述边缘部的角部位置和/或位于所述边缘部的直边位置。
  9. 根据权利要求1至5任一权利要求所述的一种振膜，其特征在于，所述振膜本体部的材质为硅胶。
  10. 根据权利要求1至5任一所述的一种振膜，其特征在于，所述补强件的材质为工程塑料或热塑性弹性体。
  11. 根据权利要求10所述的一种振膜，其特征在于，所述工程塑料包括PU、PEEK、PAR、PEI、PI、PPS、PEN、PET和PBT中的至少一种，所述热塑性 弹性体包括苯乙烯类、烯烃类、双烯类、氯乙烯类、氨酯类、酯类、酰胺类、有机氟类、有机硅类和乙烯类热塑性弹性体中的至少一种。
  12. 微型发声器，包括振动系统，所述振动系统包括结合在一起的振膜和音圈，其特征在于，所述振膜为权利要求1所述的振膜。
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