WO2016206328A1 - 微型扬声器 - Google Patents

微型扬声器 Download PDF

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Publication number
WO2016206328A1
WO2016206328A1 PCT/CN2015/097854 CN2015097854W WO2016206328A1 WO 2016206328 A1 WO2016206328 A1 WO 2016206328A1 CN 2015097854 W CN2015097854 W CN 2015097854W WO 2016206328 A1 WO2016206328 A1 WO 2016206328A1
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WO
WIPO (PCT)
Prior art keywords
housing
casing
sealing portion
sealing
housings
Prior art date
Application number
PCT/CN2015/097854
Other languages
English (en)
French (fr)
Inventor
李桂岭
任振金
Original Assignee
歌尔声学股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 歌尔声学股份有限公司 filed Critical 歌尔声学股份有限公司
Priority to US15/541,582 priority Critical patent/US10142737B2/en
Publication of WO2016206328A1 publication Critical patent/WO2016206328A1/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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to the technical field of electroacoustic products, in particular to a miniature speaker.
  • Micro-speakers are important acoustic components of portable electronic devices used to convert electrical and acoustic signals. They are energy conversion devices.
  • Existing microspeakers typically include a housing that is typically formed by combining at least two housings that house a vibration system and a magnetic circuit system in a space enclosed by the housings.
  • the sealing combination is required between the respective housings. At present, the sealing between the two housings is usually sealed by an ultrasonic welding process or an adhesive seal.
  • micro-speakers which are the main acoustic components of portable electronic devices
  • micro-speakers which are the main acoustic components of portable electronic devices
  • Providing an ultrasonic line for ultrasonic sealing is becoming more and more difficult to achieve a seal between the two housings, and the use of existing ultrasonic welding seals or adhesive seals can also cause the following problems:
  • the two housings 100 are sealed and sealed by the sealant 102, and the sealant 102 will overflow to the inner and outer sides of the housing; as shown in FIG. 2, the two housings 100 are ultrasonically welded. The process seals, and the melted ultrasonic line 104 also overflows to the inner and outer sides of the housing.
  • the volume of the microspeaker cavity is reduced, affecting the acoustic performance and the installation position of the internal components; when the sealant and the melted ultrasonic wire are directed to the shell
  • the appearance of the micro-speaker is affected, and the external size of the micro-speaker is locally increased, which may affect the assembly of the micro-speaker in the portable electronic device.
  • the technical problem to be solved by the present invention is to provide a micro speaker.
  • the micro-speaker housing has good sealing property, and the inner cavity and the appearance of the joint of the two housings are good, and there is no problem of overflowing and overflowing.
  • the technical solution of the present invention is:
  • a miniature speaker includes a housing in which a vibration system and a magnetic circuit system are housed, the housing being formed by combining at least two housings, one of the housings being coupled to the other of the housings
  • the sealed portion is provided with a convex sealing portion, and the sealing portion is integrally formed with the casing by a two-color injection molding process, the material hardness of the sealing portion is smaller than the material hardness of the casing, and the sealing portion has Compressibility;
  • the housing is further provided with a coupling member for coupling with the other housing, the coupling member and the sealing portion are located on the same side of the housing.
  • sealing portion is an annular structure, and the coupling member is located outside the sealing portion.
  • the housing provided with the sealing portion and the coupling member has a rectangular structure
  • the coupling member is provided with four
  • the four coupling members are respectively disposed at four corners of the housing. .
  • the bonding component is an ultrasonic wire
  • the casing is combined with another of the casings by an ultrasonic welding process.
  • the outer casing includes a first casing, a second casing and a third casing which are sequentially joined together, and the ultrasonic wire and the sealing portion are both disposed on the third casing.
  • the bonding component is a heat-melting column
  • the other of the casings is provided with a hot-melt hole corresponding to the position of the heat-melting column, and the casing passes through the other of the casings.
  • the hot melt process is combined.
  • the outer casing includes a first casing, a second casing and a third casing which are sequentially joined together, the heat-melting column and the sealing portion are both located on the third casing, and the heat-melting A hole is located on the second housing.
  • the second housing and the third housing are both injection molded housings.
  • the outer casing includes a first casing and a second casing joined together, the heat-melting column and the sealing portion are both located on the second casing, and the hot-melt hole is located at the first On the housing, the first housing is a metal housing.
  • the material of the sealing portion is one of silica gel, TPU, TPC or TPR.
  • the microspeaker of the present invention comprises a casing
  • the casing is formed by combining at least two casings, and a portion of the casing sealed with the other casing is provided with a convex sealing portion, and the sealing portion and the casing pass the two colors
  • the injection molding process is integrally formed, and the material of the sealing portion is small in hardness and compressible;
  • the housing is further provided with a coupling member for coupling with another housing, and the coupling member and the sealing portion are located on the same side of the housing.
  • the sealing method solves the sealing problem in the small space of the product, has good sealing performance, and does not have the problem of overflowing and overflowing, ensuring the inner cavity and appearance of the micro-speaker, thereby ensuring the acoustic performance of the micro-speaker. And assembly with portable electronic devices.
  • the micro-speaker of the present invention solves the technical problem of poor sealing between the housings of the micro-speakers in the prior art.
  • the micro-speaker of the invention solves the sealing problem under the small space of the product, has good sealing performance, and ensures The micro-speaker has a good inner cavity and appearance.
  • FIG. 1 is a schematic structural view of a prior art housing sealed by a sealant
  • FIG. 2 is a schematic structural view of a prior art housing sealed by ultrasonic welding
  • FIG. 3 is a schematic exploded view showing the housing of the first embodiment of the microspeaker of the present invention.
  • Figure 4 is a combination view of Figure 3;
  • Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
  • Figure 6 is an enlarged view of a portion B of Figure 5;
  • Figure 7 is a schematic structural view of the third housing of Figure 1;
  • Figure 8 is a schematic exploded view showing the housing of the second embodiment of the microspeaker of the present invention.
  • Figure 9 is a schematic structural view of the third housing of Figure 8.
  • Figure 10 is a schematic exploded view showing the housing of the third embodiment of the microspeaker of the present invention.
  • Figure 11 is a schematic structural view of the second housing of Figure 10;
  • first housing, 10b first housing, 20a, second housing, 20b, second housing, 22, hot melt hole, 30a, third housing, 30b, third housing 32, sealing portion, 34, ultrasonic wire, 36, hot-melt column, 40, first casing, 42, hot-melt hole, 50, second casing, 52, sealing portion, 54, hot-melt column, 100, Housing, 102, sealant, 104, molten ultrasonic line.
  • the inner finger referred to in this specification refers to the side near the center of the housing, and the outer side refers to the side away from the center of the housing.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a micro-speaker is a rectangular structure including a casing composed of a first casing 10a, a second casing 20a and a third casing 30a which are sequentially joined together.
  • a vibration system and a magnetic circuit system (not shown) are housed in a space surrounded by the first casing 10a, the second casing 20a, and the third casing 30a.
  • the first housing 10a, the second housing 20a, and the third housing 30a are both injection molded housings.
  • the edge portion of the side where the third casing 30a and the second casing 20a are combined is provided with a convex sealing portion 32, and the sealing portion 32 is a rounded rectangular ring structure, and is sealed.
  • the portion 32 and the main body of the third casing 30a are integrally molded by a two-color injection molding process, the material hardness of the sealing portion 32 is smaller than the material hardness of the main body of the third casing 30a, and the sealing portion 32 has a certain compressibility and elasticity, and the sealing portion 32 is
  • the material is one of silica gel, TPU (Thermoplastic polyurethanes), TPC (Thermoplastic Composites) or TPR (Thermoplastic Rubber), but is not limited to the above four materials. As long as it is soft, it has compressibility and elasticity, and materials that can be molded by injection molding can be used as the material of the seal.
  • the third housing 30a is provided with one side of the sealing portion 32 (ie, the side combined with the second housing 20a), and is further provided with a coupling member, and the third housing 30a is coupled.
  • the component is integrated with the second housing 20a.
  • the bonding component is an ultrasonic wire 34, and the ultrasonic wires 34 are provided in four, which are respectively disposed at four corner positions outside the sealing portion 32, and the third casing 30a and the second casing 20a are combined by an ultrasonic welding process. .
  • the sealing portion 32 is pressed by the second housing 20a and the third housing 30a, because the material of the sealing portion 32 is soft. And having a certain elasticity, the sealing portion 32 is compressed and deformed under the pressing force of the two housings, and is in close contact with the second housing 20a, thereby realizing the third housing 30a and the second housing 20a. Sealed. Since the four ultrasonic wires 34 are both short and located at a corner position where the third casing 30a has a large space, when the ultrasonic wire 34 is melted, there is no flashing phenomenon, thereby realizing the sealing between the casings. The micro-speaker cavity and appearance are guaranteed to be good. In practical applications, the sealing portion and the coupling member may be disposed between the first housing 10a and the second housing 20a to achieve bonding and sealing of the first housing 10a and the second housing 20a.
  • 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 outer casing of the microspeaker is composed of a first casing 10b, a second casing 20b, and a third casing 30b which are sequentially joined together, and the sealing portion 32 and the coupling member are both disposed in the third.
  • the coupling members are heat-melting columns 36 respectively disposed at the four corners of the third casing 30b, and the four corners of the second casing 20b are respectively disposed corresponding to the positions of the respective heat-melting columns 36.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • This embodiment is basically the same as the second embodiment, and the difference is:
  • the outer casing of the micro-speaker is composed of a first housing 40 and a second housing 50 that are coupled together, and the sealing portion 52 and the heat-melting column 54 are both disposed on the second housing 50.
  • the sealing portion 52 is disposed at an edge portion of the second casing 50, and is a racetrack-shaped annular structure, four The heat-melting columns 54 are respectively disposed at four corners outside the sealing portion 52.
  • the first housing 40 is provided with a hot-melting hole 42 corresponding to the position of the four heat-melting columns 54, respectively, and the first housing 40 is a metal housing.
  • the first housing 40 and the second housing 50 are combined by a hot melt process, and the sealing portion 52 achieves a seal therebetween.
  • the invention adopts a two-color injection molding process to inject a soft annular sealing portion on a casing sealed with another casing, and the sealing of the sealing portion by the two casings achieves good between the two casings.
  • Sealing at the same time, compared with the glue sealing in the prior art, the process eliminates the glue coating, simplifies the assembly process, and does not have the problem of overflowing glue, ensuring the inner cavity and appearance of the micro-speaker is good;
  • the ultrasonic welding seal in the prior art there is no problem of flashing, and the inner cavity and appearance of the micro-speaker are ensured, thereby ensuring the acoustic performance of the micro-speaker and the assembly with the portable electronic device. Effectively solve the sealing problem of small space products.
  • the above embodiments of the present invention are merely illustrative of the technical solution of the present invention for implementing the sealing between the housings by using a two-color injection molding process, wherein the housing structure of the microspeaker is not limited to the above rectangular structure, and may be circular or racetrack shaped.
  • the technical solution of the present invention can be applied to the sealing between any one of the micro-speaker housings, and the technical solution of the present invention can be applied to other structures without any creative labor according to the description of the above embodiments.
  • the feature nomenclature (such as the first housing, the second housing, and the third housing) referred to in this specification is only for distinguishing technical features, and does not represent the positional relationship between the features, the assembly sequence and Work order, etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Casings For Electric Apparatus (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

微型扬声器，涉及电声产品技术领域，包括外壳，所述外壳内收容有振动系统和磁路系统，所述外壳由至少两个壳体结合而成，其中的一个所述壳体上与另一个所述壳体相密封的部位设有凸起的密封部，所述密封部与该所述壳体通过双色注塑工艺一体成型，所述密封部的材质硬度小于该所述壳体的材质硬度，所述密封部具有压缩性；该所述壳体上还设有用于与另一所述壳体相结合的结合部件，所述结合部件与所述密封部位于该所述壳体的同一侧。本发明微型扬声器解决了现有技术中微型扬声器的壳体之间密封不良的技术问题，本发明微型扬声器解决了产品小空间情况下的密封问题，密封性好，且保证了微型扬声器内腔及外观的良好。

Description

微型扬声器
本申请要求于2015年06月23日提交中国专利局、申请号为201510350108.8、发明名称为“微型扬声器”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电声产品技术领域，特别涉及一种微型扬声器。
背景技术
微型扬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。现有的微型扬声器通常包括外壳，外壳通常由至少两个壳体结合而成，各壳体共同围成的空间内收容有振动系统和磁路系统。为了保证微型扬声器的声学性能，因此其各个壳体之间不仅需要固定结合，还需要密封结合，目前，两个壳体之间的密封通常是采用超声焊接工艺密封或者胶粘密封。
随着便携式电子设备的不断小型化，作为便携式电子设备的主要声学部件的微型扬声器也在不断的随之变小，在微型扬声器壳体体积不断变小的情况下，有些壳体上会没有空间设置用于超声密封的超声线，要想实现两个壳体之间的密封就越来越困难，且采用现有的超声焊接密封或胶粘密封还会产生如下不良：
如图1所示，两个壳体100之间通过密封胶102粘接密封，密封胶102会向壳体的内外两侧溢出；如图2所示，两个壳体100之间通过超声焊接工艺密封，融化后的超声线104也会向壳体的内外两侧溢出。当密封胶和融化后的超声线向壳体的内侧溢出时，会减小微型扬声器内腔的体积，影响其声学性能及内部各部件的安装位置；当密封胶和融化后的超声线向壳体的外侧溢出时，会影响微型扬声器的外观，使得微型扬声器的外部尺寸局部增大，会影响微型扬声器在便携式电子设备中的装配。
发明内容
针对以上缺陷，本发明所要解决的技术问题是提供一种微型扬声器， 此微型扬声器壳体之间密封性好，且在其两个壳体相结合处的内腔及外观均良好，无溢胶、溢料的问题。
为解决上述技术问题，本发明的技术方案是：
一种微型扬声器，包括外壳，所述外壳内收容有振动系统和磁路系统，所述外壳由至少两个壳体结合而成，其中的一个所述壳体上与另一个所述壳体相密封的部位设有凸起的密封部，所述密封部与该所述壳体通过双色注塑工艺一体成型，所述密封部的材质硬度小于该所述壳体的材质硬度，所述密封部具有压缩性；该所述壳体上还设有用于与另一所述壳体相结合的结合部件，所述结合部件与所述密封部位于该所述壳体的同一侧。
其中，所述密封部为环形结构，所述结合部件位于所述密封部的外侧。
其中，设有所述密封部及所述结合部件的所述壳体为矩形结构，所述结合部件设有四个，四个所述结合部件分别设置在该所述壳体的四个角部。
作为一种实施方式，所述结合部件为超声线，该所述壳体与另一个所述壳体通过超声焊接工艺结合。
其中，所述外壳包括依次结合在一起的第一壳体、第二壳体和第三壳体，所述超声线及所述密封部均设置在所述第三壳体上。
作为另一种实施方式，所述结合部件为热熔柱，另一所述壳体上对应所述热熔柱的位置设有热熔孔，该所述壳体与另一所述壳体通过热熔工艺结合。
其中，所述外壳包括依次结合在一起的第一壳体、第二壳体和第三壳体，所述热熔柱及所述密封部均位于所述第三壳体上，所述热熔孔位于所述第二壳体上。
其中，所述第二壳体和所述第三壳体均为注塑壳体。
其中，所述外壳包括结合在一起的第一壳体和第二壳体，所述热熔柱及所述密封部均位于所述第二壳体上，所述热熔孔位于所述第一壳体上，所述第一壳体为金属壳体。
其中，所述密封部的材质为硅胶、TPU、TPC或TPR中的一种。
采用了上述技术方案后，本发明的有益效果是：
由于本发明微型扬声器包括外壳，外壳由至少两个壳体结合而成，其中的一个壳体上与另一个壳体相密封的部位设有凸起的密封部，密封部与该壳体通过双色注塑工艺一体成型，密封部的材质硬度小且具有压缩性；该壳体上还设有用于与另一壳体相结合的结合部件，结合部件与密封部位于该壳体的同一侧。通过在一个壳体上采用双色注塑工艺注塑一具有压缩性的密封部，两个壳体通过结合部件固定结合为一体时，密封部被两个壳体挤压，使得其与另一壳体紧密接触，从而实现了两个壳体之间的密封。此种密封方式解决了产品小空间情况下的密封问题，密封性好，且不会出现溢胶及溢料的问题，保证了微型扬声器内腔及外观的良好，从而保证了微型扬声器的声学性能及与便携式电子设备之间的装配。
综上所述，本发明微型扬声器解决了现有技术中微型扬声器的壳体之间密封不良的技术问题，本发明微型扬声器解决了产品小空间情况下的密封问题，密封性好，且保证了微型扬声器内腔及外观的良好。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术中壳体间通过密封胶密封后的结构示意图；
图2是现有技术中壳体间通过超声焊接密封后的结构示意图；
图3是本发明微型扬声器实施例一的壳体的分解结构示意图；
图4是图3的组合图；
图5是图4的A-A线剖视图；
图6是图5的B部放大图；
图7是图1中第三壳体的结构示意图；
图8是本发明微型扬声器实施例二的壳体的分解结构示意图；
图9是图8中第三壳体的结构示意图；
图10是本发明微型扬声器实施例三的壳体的分解结构示意图；
图11是图10中第二壳体的结构示意图；
图中：10a、第一壳体，10b、第一壳体，20a、第二壳体，20b、第二壳体，22、热熔孔，30a、第三壳体，30b、第三壳体，32、密封部，34、超声线，36、热熔柱，40、第一壳体，42、热熔孔，50、第二壳体，52、密封部，54、热熔柱，100、壳体，102、密封胶，104、融化后的超声线。
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内侧指靠近壳体中心的一侧，外侧指远离壳体中心的一侧。
实施例一：
如图3、图4和图5共同所示，一种微型扬声器，为矩形结构，包括外壳，外壳由依次结合在一起的第一壳体10a、第二壳体20a和第三壳体30a构成，第一壳体10a、第二壳体20a和第三壳体30a共同围成的空间内收容有振动系统和磁路系统(图中未示出)。第一壳体10a、第二壳体20a和第三壳体30a均为注塑壳体。
如图3和图7共同所示，第三壳体30a与第二壳体20a相结合的一侧的边缘部位设有凸起的密封部32，密封部32为圆角矩形环状结构，密封部32与第三壳体30a的主体通过双色注塑工艺一体成型，密封部32的材质硬度小于第三壳体30a的主体的材质硬度，密封部32具有一定的压缩性和弹性，密封部32的材质为硅胶、TPU(Thermoplastic polyurethanes，热塑性聚氨酯弹性体橡胶)、TPC(Thermoplastic Composites，热塑基复合材料)或TPR(Thermoplastic Rubber，热塑性橡胶)中的一种，但并不限于上述四种材料，只要是材质较软，具有压缩性及弹性，且可通过注塑工艺成型的材料均可以作为密封部的材质。
如图3和图7共同所示，第三壳体30a设有密封部32的一侧(即与第二壳体20a相结合的一侧)还设有结合部件，第三壳体30a通过结合部件与第二壳体20a结合为一体。本实施方式中结合部件为超声线34，超声线34共设有四个，分别设置在密封部32外侧的四个角部位置，第三壳体30a与第二壳体20a通过超声焊接工艺结合。
如图5和图6共同所示，第三壳体30a与第二壳体20a结合后，密封部32被第二壳体20a与第三壳体30a挤压，由于密封部32的材质较软且具有一定的弹性，在两个壳体的挤压力作用下，密封部32会被压缩变形，与第二壳体20a紧密接触，从而实现第三壳体30a与第二壳体20a之间的密封。由于四个超声线34均较短，且位于第三壳体30a空间较大的角部位置，当超声线34融化后不会出现溢料的现象，从而在实现了壳体间密封的前提下保证了微型扬声器内腔及外观的良好。实际应用中，密封部及结合部件也可以设置在第一壳体10a与第二壳体20a之间，实现第一壳体10a与第二壳体20a的结合及密封。
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：
如图8和图9共同所示，微型扬声器的外壳由依次结合在一起的第一壳体10b、第二壳体20b和第三壳体30b构成，密封部32和结合部件均设置在第三壳体30b上，本实施方式中结合部件为分别设置在第三壳体30b四个角部的热熔柱36，第二壳体20b的四个角部对应各热熔柱36的位置分别设有一热熔孔22，第三壳体30b与第二壳体20b通过热熔工艺结合为一体，密封部32实现二者之间的密封。
实施例三：
本实施方式与实施例二基本相同，其不同之处在于：
如图10和图11共同所示，微型扬声器的外壳由结合在一起的第一壳体40和第二壳体50构成，密封部52与热熔柱54均设置在第二壳体50上，密封部52设置在第二壳体50的边缘部位，为跑道形环状结构，四个 热熔柱54分别设置在密封部52外侧的四个角部，第一壳体40上对应四个热熔柱54的位置分别设有一热熔孔42，第一壳体40这金属壳体。第一壳体40与第二壳体50通过热熔工艺结合，密封部52实现二者之间的密封。
本发明采用双色注塑工艺在一个壳体上与另一个壳体相密封的部位注塑有软质的环形密封部，通过两个壳体对密封部的挤压实现了两个壳体之间的良好密封，同时该工艺与现有技术中的涂胶密封相比，省去了涂胶的环节，简化了组装工序，且不会出现溢胶的问题，保证了微型扬声器的内腔及外观良好；与现有技术中的超声焊接密封相比，不会出现溢料的问题，也保证了微型扬声器的内腔及外观良好，进而保证了微型扬声器的声学性能，及与便携式电子设备的装配顺利，有效的解决了小空间产品的密封问题。
本发明上述实施例仅是对本发明采用双色注塑工艺来实现壳体间密封的技术方案的举例说明，其中微型扬声器的壳体结构并不仅限于上述的矩形结构，其还可以是圆形、跑道形等，本发明的技术方案可适用于任何一种微型扬声器壳体间的密封，本领域技术人员根据上述实施例的描述不需要付出任何创造性劳动就可将本发明的技术方案应用到其它结构的微型扬声器中，故无论微型扬声器的其它结构是否与上述实施例相同，只要是采用双色注塑工艺来实现壳体间密封，用以简化组装工艺、提高微型扬声器内腔及外观质量的产品均落入本发明的保护范围内。
本说明书中涉及到的带有序号的特征命名(如第一壳体、第二壳体及第三壳体)仅是为了区别技术特征，并不代表各特征之间的位置关系，组装顺序及工作顺序等。
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之内。

Claims (10)

  1. 微型扬声器，包括外壳，所述外壳内收容有振动系统和磁路系统，所述外壳由至少两个壳体结合而成，其特征在于，其中的一个所述壳体上与另一个所述壳体相密封的部位设有凸起的密封部，所述密封部与该所述壳体通过双色注塑工艺一体成型，所述密封部的材质硬度小于该所述壳体的材质硬度，所述密封部具有压缩性；该所述壳体上还设有用于与另一所述壳体相结合的结合部件，所述结合部件与所述密封部位于该所述壳体的同一侧。
  2. 根据权利要求1所述的微型扬声器，其特征在于，所述密封部为环形结构，所述结合部件位于所述密封部的外侧。
  3. 根据权利要求2所述的微型扬声器，其特征在于，设有所述密封部及所述结合部件的所述壳体为矩形结构，所述结合部件设有四个，四个所述结合部件分别设置在该所述壳体的四个角部。
  4. 根据权利要求3所述的微型扬声器，其特征在于，所述结合部件为超声线，该所述壳体与另一个所述壳体通过超声焊接工艺结合。
  5. 根据权利要求4所述的微型扬声器，其特征在于，所述外壳包括依次结合在一起的第一壳体、第二壳体和第三壳体，所述超声线及所述密封部均设置在所述第三壳体上。
  6. 根据权利要求3所述的微型扬声器，其特征在于，所述结合部件为热熔柱，另一所述壳体上对应所述热熔柱的位置设有热熔孔，该所述壳体与另一所述壳体通过热熔工艺结合。
  7. 根据权利要求6所述的微型扬声器，其特征在于，所述外壳包括依次结合在一起的第一壳体、第二壳体和第三壳体，所述热熔柱及所述密封部均位于所述第三壳体上，所述热熔孔位于所述第二壳体上。
  8. 根据权利要求5或7所述的微型扬声器，其特征在于，所述第二壳体和所述第三壳体均为注塑壳体。
  9. 根据权利要求6所述的微型扬声器，其特征在于，所述外壳包括结 合在一起的第一壳体和第二壳体，所述热熔柱及所述密封部均位于所述第二壳体上，所述热熔孔位于所述第一壳体上，所述第一壳体为金属壳体。
  10. 根据权利要求1所述的微型扬声器，其特征在于，所述密封部的材质为硅胶、TPU、TPC或TPR中的一种。
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