WO2018196155A1 - 扬声器模组 - Google Patents

扬声器模组 Download PDF

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Publication number
WO2018196155A1
WO2018196155A1 PCT/CN2017/090347 CN2017090347W WO2018196155A1 WO 2018196155 A1 WO2018196155 A1 WO 2018196155A1 CN 2017090347 W CN2017090347 W CN 2017090347W WO 2018196155 A1 WO2018196155 A1 WO 2018196155A1
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WO
WIPO (PCT)
Prior art keywords
sheet
yoke
speaker module
resonant
housing
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PCT/CN2017/090347
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English (en)
French (fr)
Inventor
张兆强
许晋鹏
张宪信
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歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2018196155A1 publication Critical patent/WO2018196155A1/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
    • H04R9/02—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
    • H04R9/06—Loudspeakers

Definitions

  • the utility model relates to the technical field of electroacoustic products, in particular to a speaker module.
  • the speaker module is an important acoustic component of a portable electronic device for converting between an electrical signal and a sound signal, and is an energy conversion device.
  • the speaker module generally includes a housing and a speaker unit housed in the housing.
  • the speaker unit includes a vibration system and a magnetic circuit system.
  • the magnetic circuit system includes a yoke and a magnet and a magnetic conductive plate sequentially fixed on the yoke; the vibration system includes The diaphragm and the voice coil, the voice coil moves up and down the magnetic field of force in the magnetic gap of the magnetic circuit system, thereby driving the diaphragm to inspire the air to sound.
  • the voice coil When the speaker unit is working, the voice coil generates a lot of heat. Since the voice coil works at a temperature of up to 120 ° C, the heat resistance temperature of the module casing is generally around 130 ° C. The heat generated by the voice coil is mainly radiated by the yoke. The heat of the yoke surface is likely to cause the module casing to be hot near the yoke, thereby causing damage to the speaker module and reducing the service life. At the same time, due to the gap between the yoke and the module casing, the casing easily resonates with the speaker unit, thereby generating noise, which deteriorates the sound quality of the speaker module.
  • the technical problem to be solved by the present invention is to provide a speaker module, which can quickly dissipate heat, the casing is not easily burned, and has a long service life; at the same time, the anti-resonance effect is good, and no resonance sound is generated. The sound quality is high.
  • the technical solution of the present invention is:
  • a speaker module includes a housing and a speaker unit housed in the housing, and a heat conducting sheet is attached to a portion of the housing corresponding to a yoke of the speaker unit, the heat conducting sheet and the yoke Anti-resonant glue is filled between them.
  • the area of the heat conductive sheet is larger than the area where the yoke is projected onto the outer casing.
  • thermally conductive sheet comprises an extension beyond the edge of the yoke.
  • the heat conducting sheet is a graphite sheet, or the heat conducting sheet is a ceramic heat sink or a heat dissipating aluminum sheet.
  • the anti-resonant glue is a silica gel adhesive, or the anti-resonant glue is one of a UV glue or a thermosetting glue; the anti-resonant glue is a ring structure and is coated on an edge portion of the yoke .
  • the anti-resonant glue is a parallel elongated structure or a cross-shaped cross-shaped structure.
  • the anti-resonant glue is a thermal grease or thermal silica gel coated between the heat conducting sheet and the yoke, and the anti-resonant glue is filled in a planar shape on the heat conducting sheet and the yoke More than 1/3 of the area.
  • a plastic piece is disposed between the side of the speaker unit and the side wall of the outer casing, and the plastic piece divides the entire module cavity into two cavities of a front acoustic cavity and a rear acoustic cavity, the plastic piece It is one of a PET sheet, an ABS sheet, a PC sheet, a POM sheet, a PS sheet, a PMMA sheet, a PBT sheet or a PPO sheet.
  • the anti-resonant rubber is filled between the heat conductive sheet and the yoke.
  • the heat conducting sheet has good thermal conductivity in the transverse direction along the plane direction thereof, and has good heat insulating performance in the longitudinal direction perpendicular to the plane direction thereof, and can quickly transfer the heat of the yoke surface laterally into the inner cavity of the module, and then pass
  • the module case transfers heat to the outside, the heat transfer piece changes the heat transfer direction, increases the heat transfer area, and reduces the heat accumulation on the module case near the yoke side, greatly reducing the module housing here.
  • the probability of being burned prolongs the service life of the speaker module; and after the heat is released in time, the ambient temperature of the anti-resonant glue is lowered, which can be far lower than the temperature at which it fails, and the anti-resonance effect is maintained well, which can be effective
  • the prevention of resonance sound generation, the sound quality is high.
  • the technical scheme of the utility model has a simple structure and is simple and easy to implement in the process.
  • the speaker module of the present invention solves the technical problem that the outer casing of the speaker module is easy to burn and the resonance sound is easy to generate.
  • the speaker module of the utility model can quickly dissipate heat, and the outer casing is not easily burned.
  • the utility model has the advantages of long service life, good anti-resonance effect, no resonance sound, high sound quality, and simple and easy process.
  • FIG. 1 is a schematic view showing the internal structure of a speaker module of the present invention
  • FIG. 2 is a schematic view showing the inner structure of the second casing of the speaker module of the present invention.
  • FIG. 3 is a cross-sectional structural view of the speaker module of the present invention.
  • Figure 4 is an enlarged view of a portion A of Figure 3;
  • first housing 20, second housing, 30, speaker unit, 40, anti-resonance glue, 50, graphite sheet, 52, extension, 60, plastic sheet, 70, front sound chamber, 72 After the sound chamber.
  • the inner finger referred to in this specification is located on one side of the inner cavity of the module, and the outer side is located on the side outside the inner cavity of the module.
  • a speaker module includes a casing composed of a first casing 10 and a second casing 20 that are joined together, a first casing 10 and a second casing.
  • the speaker unit 30 is housed in a space surrounded by the body 20.
  • the speaker unit 30 is fixed on the first housing 10, and a rigid plastic sheet 60 is disposed between the side of the speaker unit 30 and the side wall of the first housing 10.
  • the plastic sheet 60 separates the entire module cavity into Two chambers of the front acoustic chamber 70 and the rear acoustic chamber 72, wherein: the speaker unit 30, the first housing 10 and the plastic sheet 60 together form a front acoustic chamber 70; the speaker unit 30, the first housing 10, and the second housing 20 and the plastic sheet 60 together form a rear acoustic cavity 72.
  • the speaker unit 30 includes a vibration system and a magnetic circuit system (not shown), and the magnetic circuit system includes a yoke and a magnet and a magnetically permeable magnet which are sequentially fixed to the yoke. board.
  • the heat conductive sheet 50 is attached to the inner side of the second housing 20 near the yoke.
  • the heat conductive sheet is preferably a graphite sheet.
  • the area of the heat conductive sheet 50 is larger than the yoke is projected onto the second housing 20 .
  • the area of the heat conducting sheet 50 includes an extending portion 52 beyond the edge of the yoke.
  • the heat conducting sheet 50 can transfer the heat accumulated on the surface of the yoke laterally into the cavity of the module, and then the first housing 10 and the first The two casings 20 are mutually radiated to the outside, and the heat insulation effect is good in the longitudinal direction, and the portion of the second casing 20 close to the yoke can be effectively prevented from being burned, which is advantageous for extending the service life of the speaker module.
  • the graphite sheet is only a material of the heat conductive sheet which is preferred in the embodiment. In practical applications, the material of the heat conductive sheet is not limited to the graphite sheet, and a ceramic heat sink or a heat dissipating aluminum sheet or the like may be used.
  • an anti-resonant glue 40 is filled between the graphite sheet 50 and the yoke.
  • the anti-resonant adhesive 40 is coated on the yoke and has a ring structure, and is coated one week along the edge portion of the yoke.
  • the graphite sheet 50 is Anti-resonance glue 40
  • the contact that is, the gap between the graphite sheet 50 and the anti-resonant glue 40, can effectively prevent the generation of resonance sound and improve the sound quality of the speaker module.
  • the coating trajectory of the anti-resonant glue may also be other shapes, such as parallel strips, cross-sections, and the like.
  • the anti-resonant adhesive 40 is preferably one of a silicone adhesive, a UV adhesive (UV curable adhesive) or a thermosetting adhesive. Further preferred in the embodiment, the anti-resonant adhesive 40 It is a silicone adhesive with high temperature resistance and elastic shock resistance.
  • the anti-resonant adhesive may also be made of a thermal grease or a thermal silica gel.
  • the thermal conductive silicone or the thermal grease is applied in a planar shape between the thermal conductive sheet and the yoke, and preferably the filling area should be more than 1/3 of the yoke area.
  • the plastic sheet 60 is preferably a PET (polyethylene terephthalate) sheet, an ABS (acrylonitrile-butadiene-styrene) sheet, a PC (polycarbonate) sheet, or a POM (polyoxymethylene) sheet.
  • PET polyethylene terephthalate
  • ABS acrylonitrile-butadiene-styrene
  • PC polycarbonate
  • POM polyoxymethylene
  • PS polystyrene
  • PMMA polymethyl methacrylate
  • PBT polybutylene terephthalate
  • PPO polyphenylene ether
  • the utility model pastes the heat conducting sheet on the outer shell portion close to the yoke, and applies anti-resonant rubber on the yoke, thereby effectively preventing the module shell from being burned, prolonging the service life of the speaker module, and also ensuring anti-resonance.
  • the anti-resonance effect of the glue improves the sound quality of the speaker module.
  • the technical solution of the present invention is exemplified by taking the speaker module of the above structure as an example.
  • the technical solution of the present invention is not limited to the speaker module of the above structure, and can be applied to any one of the following.
  • the speaker unit is completely located in the speaker module inside the module housing.
  • the technical solution of the present invention can be applied to the speaker module of other structures without any creative labor.

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

Abstract

一种扬声器模组，涉及电声产品技术领域，包括外壳及收容在外壳内的扬声器单体(30)，外壳的内侧对应扬声器单体(30)的磁轭的部位贴有导热片(50)，导热片(50)与磁轭之间填充有防共振胶(40)。该扬声器模组解决了现有扬声器模组的外壳易烫化及易产生共振音的技术问题，使扬声器模组能够快速的散热，外壳不易被烫化，使用寿命长；同时防共振效果好，不会产生共振音，声音质量高；且工艺简单易实现。

Description

扬声器模组 技术领域
本实用新型涉及电声产品技术领域，特别涉及一种扬声器模组。
背景技术
扬声器模组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。扬声器模组通常包括外壳及收容在外壳内的扬声器单体，扬声器单体包括振动系统和磁路系统，磁路系统包括磁轭及依次固定在磁轭上的磁铁和导磁板；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。
在扬声器单体工作时音圈会产生大量的热量，由于音圈工作温度高达120℃，而模组外壳的耐热温度一般在130℃左右，音圈产生的热量主要通过磁轭来散热，大量的热量在磁轭表面积聚极易引起靠近磁轭处的模组外壳烫化，从而使得扬声器模组损坏，使用寿命降低。同时由于磁轭与模组外壳之间存在间隙，外壳极易与扬声器单体产生共振，从而产生杂音，使得扬声器模组的声音质量变差。
实用新型内容
针对以上缺陷，本实用新型所要解决的技术问题是提供一种扬声器模组，此扬声器模组能够快速的散热，外壳不易被烫化，使用寿命长；同时防共振效果好，不会产生共振音，声音质量高。
为解决上述技术问题，本实用新型的技术方案是：
一种扬声器模组，包括外壳及收容在所述外壳内的扬声器单体，所述外壳的内侧对应所述扬声器单体的磁轭的部位贴有导热片，所述导热片与所述磁轭之间填充有防共振胶。
其中，所述导热片的面积大于磁轭正投影到外壳上的面积。
其中，所述导热片包含超出所述磁轭的边缘的延伸部分。
其中，所述导热片为石墨片，或者所述导热片为陶瓷散热片或散热铝片。
其中，所述防共振胶为硅胶粘合剂，或所述防共振胶为UV胶或热固胶中的一种；所述防共振胶为环形结构，涂覆在所述磁轭的边缘部位。
其中，防共振胶为并行的长条形结构或纵横交叉的井字形结构。
其中，所述防共振胶为涂覆在所述导热片与所述磁轭之间的导热硅脂或导热硅胶，所述防共振胶以面状填充在所述导热片与所述磁轭之间的1/3以上的区域。
其中，所述扬声器单体的侧部与所述外壳的侧壁之间设有塑料片，所述塑料片将整个模组内腔分隔为前声腔和后声腔两个腔体，所述塑料片为PET片、ABS片、PC片、POM片、PS片、PMMA片、PBT片或PPO片中的一种。
采用了上述技术方案后，本实用新型的有益效果是：
由于本实用新型扬声器模组的外壳的内侧对应扬声器单体的部位贴有导热片，导热片与磁轭之间填充有防共振胶。导热片在沿着其平面方向的横向上导热性能好，在垂直于其平面方向的纵向上隔热性能好，能够快速的将磁轭表面的热量横向传递到模组的内腔中，然后通过模组外壳将热量传递到外界，导热片改变了热量的传递方向，增大了热量的传播面积，减少了靠近磁轭侧的模组外壳上的热量积聚，大大的降低了此处模组外壳被烫化的机率，延长了扬声器模组的使用寿命；且在热量得到及时散发后，防共振胶所处的环境温度降低，可远低于其失效的温度，防共振效果保持良好，可以有效的预防共振音的产生，声音质量高。同时本实用新型的技术方案结构简单，在工艺上简单易实现。
综上所述，本实用新型扬声器模组解决了现有技术中扬声器模组的外壳易烫化及易产生共振音的技术问题，本实用新型扬声器模组能够快速的散热，外壳不易被烫化，使用寿命长；同时防共振效果好，不会产生共振音，声音质量高；且工艺简单易实现。
附图说明
图1是本实用新型扬声器模组的内部结构示意图；
图2是本实用新型扬声器模组的第二壳体的内侧结构示意图；
图3是本实用新型扬声器模组的剖视结构示意图；
图4是图3的A部放大图；
图中：10、第一壳体，20、第二壳体，30、扬声器单体，40、防共振胶，50、石墨片，52、延伸部分，60、塑料片，70、前声腔，72、后声腔。
具体实施方式
下面结合附图和实施例，进一步阐述本实用新型。
本说明书中涉及到的内侧指位于模组内腔中的一侧，外侧指位于模组内腔外的一侧。
如图1、图2和图3共同所示，一种扬声器模组，包括外壳，外壳由结合在一起的第一壳体10和第二壳体20构成，第一壳体10与第二壳体20围成的空间内收容有扬声器单体30。扬声器单体30固定在第一壳体10上，扬声器单体30的侧部与第一壳体10的侧壁之间设有硬质塑料片60，塑料片60将整个模组内腔分隔为前声腔70和后声腔72两个腔体，其中：扬声器单体30、第一壳体10和塑料片60共同围成前声腔70；扬声器单体30、第一壳体10、第二壳体20和塑料片60共同围成后声腔72。
如图2、图3和图4共同所示，扬声器单体30包括振动系统和磁路系统(图中未示出)，磁路系统包括磁轭和依次固定在磁轭上的磁铁和导磁板。第二壳体20的内侧靠近磁轭的部位贴有导热片50，本实施方式中优选导热片为石墨片，本实施方式优选导热片50的面积大于磁轭正投影到第二壳体20上的面积，导热片50包括超出磁轭的边缘的延伸部分52，导热片50能够很快速的将积聚在磁轭表面的热量横向传递到模组内腔中，然后由第一壳体10和第二壳体20共同散发到外界，而在纵向上隔热效果好，能够有效的防止第二壳体20靠近磁轭的部位被烫化，有利于延长扬声器模组的使用寿命。石墨片仅是本实施方式优选的导热片的材料，在实际应用中导热片的材料并不限于石墨片，还可以采用陶瓷散热片或散热铝片等。
如图1、图3和图4共同所示，在石墨片50和磁轭之间填充有防共振胶40。本实施方式中防共振胶40涂覆在磁轭上，且为环形结构，沿磁轭的边缘部位涂覆一周，在第一壳体10和第二壳体20超声结合后，石墨片50与防共振胶40 相接触，即石墨片50与防共振胶40之间不留间隙，能够有效的防止共振音的产生，提高了扬声器模组的声音质量。在其它实施例中，防共振胶的涂覆轨迹还可以为其它形状，例如并行的长条形、纵横交叉的井字形等等。
如图1所示，本实施方式中优选防共振胶40为硅胶粘合剂、UV胶(紫外光固化胶)或热固胶中的一种，本实施方式中进一步的优选，防共振胶40为硅胶粘合剂，其耐高温效果及弹性抗震效果好。
防共振胶还可以选用导热硅脂或导热硅胶，将导热硅胶或导热硅脂以面状涂覆填充在导热片与磁轭之间，且优选填充面积应在磁轭面积的1/3以上。
本实施方式优选塑料片60为PET(聚对苯二甲酸乙二醇酯)片、ABS(丙烯腈-丁二烯-苯乙烯)片、PC(聚碳酸酯)片、POM(聚甲醛)片、PS(聚苯乙烯)片、PMMA(聚甲基丙烯酸甲酯)片、PBT(聚对苯二甲酸丁二醇酯)片或PPO(聚苯醚)片中的一种，本实施方式中进一步的优选塑料片60为PET片。
本实用新型通过在靠近磁轭的外壳部位粘贴导热片，在磁轭上涂防共振胶，有效的防止了模组外壳被烫化，延长了扬声器模组的使用寿命，同时还保证了防共振胶的防共振效果，提高了扬声器模组的声音质量。
本说明书仅是以上述结构的扬声器模组为例对本实用新型的技术方案进行举例说明，实际应用中本实用新型的技术方案并不仅限于上述结构的扬声器模组中，其可应用于任何一种扬声器单体完全位于模组外壳内部的扬声器模组中，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实用新型的技术方案应用到其它结构的扬声器模组中，故无论扬声器模组的其它结构是否与上述实施例的相同，只要是在模组外壳内侧粘贴石墨片，并在石墨片与磁轭之间填充防共振胶的产品均落入本实用新型的保护范围内。
本实用新型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，均落在本实用新型的保护范围之内。

Claims (10)

  1. 一种扬声器模组，包括外壳及收容在所述外壳内的扬声器单体，其特征在于，所述外壳的内侧对应所述扬声器单体的磁轭的部位贴有导热片，所述导热片与所述磁轭之间填充有防共振胶。
  2. 根据权利要求1所述的扬声器模组，其特征在于，所述导热片的面积大于磁轭正投影到所述外壳上的面积。
  3. 根据权利要求1所述的扬声器模组，其特征在于，所述导热片包含超出所述磁轭的边缘的延伸部分。
  4. 根据权利要求1所述的扬声器模组，其特征在于，所述导热片为石墨片、陶瓷散热片或散热铝片。
  5. 根据权利要求1所述的扬声器模组，其特征在于，所述防共振胶为硅胶粘合剂、UV胶或热固胶。
  6. 根据权利要求5所述的扬声器模组，其特征在于，所述防共振胶为环形结构，涂覆在所述磁轭的边缘部位。
  7. 根据权利要求5所述的扬声器模组，其特征在于，所述防共振胶为并行的长条形结构或纵横交叉的井字形结构。
  8. 根据权利要求1所述的扬声器模组，其特征在于，所述防共振胶为涂覆在所述导热片与所述磁轭之间的导热硅脂或导热硅胶。
  9. 根据权利要求8所述的扬声器模组，其特征在于，所述防共振胶以面状填充在所述导热片与所述磁轭之间的1/3以上的区域。
  10. 根据权利要求1所述的扬声器模组，其特征在于，所述扬声器单体的侧部与所述外壳的侧壁之间设有塑料片，所述塑料片将整个模组内腔分隔为前声腔和后声腔两个腔体，所述塑料片为PET片、ABS片、PC片、POM片、PS片、PMMA片、PBT片或PPO片中的一种。
PCT/CN2017/090347 2017-04-27 2017-06-27 扬声器模组 WO2018196155A1 (zh)

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