WO2022000611A1 - 球顶及扬声器 - Google Patents

球顶及扬声器 Download PDF

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Publication number
WO2022000611A1
WO2022000611A1 PCT/CN2020/103247 CN2020103247W WO2022000611A1 WO 2022000611 A1 WO2022000611 A1 WO 2022000611A1 CN 2020103247 W CN2020103247 W CN 2020103247W WO 2022000611 A1 WO2022000611 A1 WO 2022000611A1
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WO
WIPO (PCT)
Prior art keywords
dome
layer
heat dissipation
material layer
loudspeaker
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Application number
PCT/CN2020/103247
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English (en)
French (fr)
Inventor
马利鹏
Original Assignee
瑞声声学科技(深圳)有限公司
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Publication of WO2022000611A1 publication Critical patent/WO2022000611A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H04R9/022—Cooling arrangements
    • 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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present application relates to the technical field of electroacoustic devices, and in particular, to a dome and a speaker.
  • the dome-shaped speaker refers to a speaker that directly radiates sound waves by using a spherical-shaped diaphragm. It belongs to an electric speaker.
  • the diaphragm is a hemispherical diaphragm. Good high frequency response, wide directivity and less distortion.
  • the dome in the prior art generally includes a PMI layer. Since the PMI layer is a closed-cell foam material, the heat dissipation of the dome can only be conducted to the magnetic circuit system of the rear cavity through the air and radiated from the magnetic circuit system, and the heat dissipation effect is not good. It is easy to cause the dome structure to deform due to heat, thereby affecting the acoustic performance of the speaker diaphragm.
  • the present application provides a carbon fiber dome and a speaker, which can solve the problem of low heat dissipation efficiency of the dome in the prior art.
  • a dome comprising a first heat dissipation layer and a base material layer arranged in layers, the base material layer comprising a foamed material layer made of a foamed material and a foamed material layer dispersed in the foamed material.
  • the thermally conductive material in the material layer, the thermal conductivity of the thermally conductive material is greater than the thermal conductivity of the foamed material.
  • the thermally conductive material includes one or more of graphene, carbon powder, graphite and metal particles.
  • the particle size of the thermally conductive material is 5-20 ⁇ m.
  • the mass fraction of the thermally conductive material in the foamed material layer is 10% to 30%.
  • the foamed material includes one or more of polyethylene terephthalate, polymethacrylimide, polyimide, polypropylene and polyphenylene sulfide.
  • the dome further includes a second heat dissipation layer stacked on a surface of the base material layer away from the first heat dissipation layer.
  • the first heat dissipation layer and the second heat dissipation layer are respectively one of an aluminum foil layer, an aluminum alloy layer and a carbon fiber layer.
  • the thickness of the base material layer is 0.05mm ⁇ 0.5mm.
  • the thickness of the dome is 0.06-0.53 mm.
  • a loudspeaker is provided, including the above-mentioned dome.
  • the beneficial effect of the present application is that: by arranging the heat-conducting material in the base material layer, the heat generated by the voice coil can be conducted to the front cavity in time by means of the heat-conducting particles in the heat-conducting material, and the heat can be dissipated from the front cavity, thereby improving the heat dissipation efficiency.
  • the composite layer of the dome structure is prevented from affecting the acoustic performance of the loudspeaker due to thermal deformation, and the stability of the loudspeaker is improved.
  • FIG. 1 is a schematic three-dimensional structure diagram of a speaker according to an embodiment of the application
  • FIG. 2 is a schematic diagram of an exploded structure of a loudspeaker according to an embodiment of the application
  • FIG. 3 is a schematic cross-sectional view of the loudspeaker of FIG. 1 along the line A-A;
  • FIG. 5 is a schematic structural diagram of a dome according to a second embodiment of the present application.
  • first”, “second” and “third” in this application are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first”, “second”, “third” may expressly or implicitly include at least one of that feature.
  • "a plurality of” means at least two, such as two, three, etc., unless otherwise expressly and specifically defined. All directional indications (such as up, down, left, right, front, rear%) in the embodiments of the present application are only used to explain the relative positional relationship between the various components under a certain posture (as shown in the accompanying drawings). , motion situation, etc., if the specific posture changes, the directional indication also changes accordingly.
  • the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.
  • FIG. 1 is a schematic three-dimensional structural diagram of a speaker according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of an exploded structure of the loudspeaker according to an embodiment of the present application
  • FIG. 3 is a schematic cross-sectional view of the loudspeaker of FIG. 1 along the AA direction line, as shown in FIGS. 1 to 3
  • the speaker 100 includes a basin frame 10 having a receiving space 11 , a magnetic circuit system 20 and a vibration system 30 fixed in the basin frame 10 .
  • the magnetic circuit system 20 includes a magnetic bowl 21 , a magnetic steel 22 arranged on the magnetic bowl 21 , and a pole core 23 attached to the surface of the magnetic steel 22 .
  • a magnetic gap 24 is formed between the magnetic bowl 21 and the magnetic steel 22 .
  • the vibration system 30 includes a fixed frame 31 fixed on the basin frame 10 , a diaphragm 32 fixed between the fixed frame 31 and the basin frame 10 , a voice coil 33 arranged in the magnetic gap 24 and driving the vibration diaphragm 32 to vibrate, and a diaphragm 33 arranged on the vibration plate. Dome 34 on the surface of membrane 32. One end of the voice coil 33 is fixedly connected to one surface of the diaphragm 32 , the other end is inserted into the magnetic gap 24 , and the diaphragm 32 is sandwiched between the dome 34 and the voice coil 33 .
  • FIG. 4 is a schematic structural diagram of the dome of the first embodiment of the present application.
  • the dome 34 includes a first heat dissipation layer 341 and a base material layer 342 that are sequentially stacked from the voice coil 33 to the diaphragm 32 .
  • the base material layer 342 includes a foamed material layer made of foamed material and a thermally conductive material dispersed in the foamed material layer, and the thermal conductivity of the thermally conductive material is greater than that of the foamed material.
  • a thermally conductive material is arranged in the base material layer 342 and the thermal conductivity of the thermally conductive material is greater than that of the foamed material, so that the heat generated by the voice coil 33 can rely on the base material layer 342
  • the middle thermal conductive material is conducted to the front cavity in time, so that the heat can be dissipated from the front cavity, the heat dissipation efficiency is improved, the composite layer of the dome structure is prevented from affecting the acoustic performance of the loudspeaker 100 due to thermal deformation, and the stability of the loudspeaker 100 is improved.
  • FIG. 5 is a schematic structural diagram of the dome of the second embodiment of the present application.
  • the dome 34 includes a first heat dissipation layer 341 , a base material layer 342 and The second heat dissipation layer 343, wherein the base material layer 342 includes a foamed material layer made of a foamed material and a thermally conductive material dispersed in the foamed material layer, and the thermal conductivity of the thermally conductive material is greater than that of the foamed material .
  • a thermally conductive material is provided in the base material layer 342 and the thermal conductivity of the thermally conductive material is greater than that of the foamed material.
  • the heat generated by the voice coil 33 is conducted to the front cavity in time by the thermally conductive material in the base material layer 342, so that the heat can be dissipated from the front cavity, which improves the heat dissipation efficiency and prevents the composite layer of the dome structure from affecting the acoustics of the speaker 100 due to thermal deformation.
  • the rigidity and strength of the dome 34 can also be significantly improved, thereby improving the performance and reliability of the product.
  • the thermally conductive material includes one or more of graphene, carbon powder, graphite and metal particles.
  • the thermally conductive material is preferably graphene, because it has the advantages of light weight, thin thickness and extremely high thermal conductivity.
  • PET terephthalate
  • PET is a polycondensation reaction product of ethylene glycol and terephthalic acid, and is a linear macromolecule with high crystallinity and high melting point.
  • PET has good mechanical properties, electrical insulation, chemical resistance, creep resistance, fatigue resistance and friction resistance.
  • Unfoamed PET is a solid material with a density of about 1.4 g/cm
  • foamed materials include polyethylene terephthalate, polymethacrylimide, polyimide, polypropylene and polyphenylene One or more of thioethers.
  • the foamed material is preferably polyethylene terephthalate.
  • Polyethylene terephthalate (about polyethylene 3 , unfoamed PET has a larger density than foamed PMI material, and the foam material layer is polyethylene terephthalate formed by foam molding of PET.
  • the glycol ester foam (PET foam) contains a large number of fine pores in the foam material layer, and the average pore diameter of the pores is 20 ⁇ m or less. In order not to affect the transmission of sound, the pores are not connected to each other, which is The air holes are independent of each other.
  • the thermal conductivity of the spherical top 34 of the above embodiment is greatly improved by compounding the PET foam and the thermally conductive material. At the same time, due to the PET foaming
  • the waterproof performance of the body not only ensures the strength of the product, but also improves the waterproof level of the product.
  • the thermally conductive material is dispersed in the foamed material in the form of thermally conductive particles in the base material layer 342 . Since the pores in the foamed material layer are closed cells and cannot conduct heat, in this embodiment, heat is conducted to the front cavity through thermally conductive particles. Further, the particle size of the thermally conductive material is 5-20 ⁇ m. The mass fraction of the thermally conductive material in the foamed material layer is 10% to 30%. In the above embodiment, the thermal conductivity of the base material layer 342 can be controlled by adjusting the particle size of the thermally conductive material and the mass fraction of the thermally conductive material in the foamed material layer.
  • the first heat dissipation layer 341 includes one of an aluminum foil layer, an aluminum alloy layer and a carbon fiber layer
  • the second heat dissipation layer 343 includes one of an aluminum foil layer, an aluminum alloy layer and a carbon fiber layer.
  • the materials of the first heat dissipation layer 341 and the second heat dissipation layer 343 may be the same or different.
  • the first heat dissipation layer 341 and the second heat dissipation layer 343 are both aluminum alloy layers.
  • the aluminum alloy layer has better thermal conductivity and lighter weight, and at the same time has a certain hardness.
  • the spherical top 34 By compounding the base material layer 342 with the first heat dissipation layer 341 and the second heat dissipation layer 343, it is possible to obtain better thermal conductivity and at the same time improve the rigidity and strength.
  • the first heat dissipation layer 341 and/or the second heat dissipation layer 343 is an aluminum foil layer. Although the aluminum foil has good thermal conductivity and light weight, it has insufficient hardness, is difficult to process, and is easily deformed when applied to the dome 34. affect product performance and reliability.
  • the first heat dissipation layer 341 and/or the second heat dissipation layer 343 are carbon fiber layers
  • the carbon fiber layers include at least two layers of carbon fiber unidirectional tape prepregs
  • the carbon fiber unidirectional tape prepregs include carbon fiber unidirectional tapes and prepreg resin
  • the carbon fiber material in the carbon fiber unidirectional tape prepreg is unidirectionally extended
  • the carbon fiber unidirectional tape prepreg can be obtained by: impregnating or spraying thermosetting prepreg resin on the carbon fiber unidirectional tape .
  • the carbon fiber unidirectional tape impregnating material with prepreg resin cured product on the carbon fiber unidirectional tape formed after high temperature and high pressure treatment, the carbon fiber unidirectional tape prepreg of the carbon fiber layer can be in the fiber extension direction, that is, the fiber direction can It can withstand a large force and can withstand a weak force in the direction perpendicular to the fiber direction, but the ability to withstand force is greatly enhanced by curing with the prep
  • the thickness of the dome 34 is 0.06-0.53 mm; further, the thickness of the base material layer 342 is 0.05-0.5 mm.

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

Abstract

本申请涉及电声装置技术领域，具体涉及一种球顶及扬声器。该球顶包括：包括层叠设置的第一散热层和基材层，基材层包括由发泡材料制成的发泡材料层和分散于发泡材料层中的导热材料，导热材料的热导率大于发泡材料的热导率。本申请的球顶及扬声器在基材层中设置导热材料，能够使音圈产生的热量依靠导热材料中的导热微粒及时传导至前腔，并从前腔将热量散发出去，提高了散热效率，避免了球顶结构的复合层由于受热变形而影响扬声器的声学性能，提高了扬声器的稳定性。

Description

球顶及扬声器 技术领域
本申请涉及电声装置技术领域，具体涉及一种球顶及扬声器。
 背景技术
球顶形扬声器是指利用球顶形振膜直接辐射声波的扬声器，属于电动式扬声器，振膜是一个半球形膜片，用振膜折环直接支撑音圈而没有定心支片，特点是高频响应好，指向性宽及失真较小。
现有技术中的球顶一般包括PMI层，由于PMI层为闭孔泡沫材料，球顶的散热只能通过空气传导至后腔磁路系统并从磁路系统中散发出去，散热效果不佳，容易导致球顶结构由于受热而变形，从而影响扬声器振膜的声学性能。
因此，有必要提供一种新的技术方案以解决上述技术问题。
 技术问题
本申请提供一种碳纤维球顶及扬声器，能够解决现有技术中球顶散热效率低的问题。
 技术解决方案
本申请的技术方案如下：提供一种球顶，包括层叠设置的第一散热层和基材层，所述基材层包括由发泡材料制成的发泡材料层和分散于所述发泡材料层中的导热材料，所述导热材料的热导率大于所述发泡材料的热导率。
优选地，所述导热材料包括石墨烯、碳粉、石墨和金属微粒中的一种或多种。
优选地，所述导热材料的粒径为5～20μm。
优选地，所述发泡材料层中所述导热材料的质量分数为10%～30%。
优选地，所述发泡材料包括聚对苯二甲酸乙二醇酯、聚甲基丙烯酰亚胺、聚酰亚胺、聚丙烯和聚苯硫醚中的一种或多种。
优选地，所述球顶还包括叠设于所述基材层远离所述第一散热层一侧表面的第二散热层。
优选地，所述第一散热层和所述第二散热层分别为铝箔层、铝合金层和碳纤维层中的一种。
优选地，所述基材层的厚度为0.05mm～0.5mm。
优选地，所述球顶的厚度为0.06～0.53mm。
本申请的另一技术方案如下：提供一种扬声器，包括上述的球顶。
 有益效果
本申请的有益效果在于：通过在基材层中设置导热材料，能够使音圈产生的热量依靠导热材料中的导热微粒及时传导至前腔，并从前腔将热量散发出去，提高了散热效率，避免了球顶结构的复合层由于受热变形而影响扬声器的声学性能，提高了扬声器的稳定性。
 附图说明
图1为本申请实施例的扬声器的立体结构示意图；
图2为本申请实施例的扬声器的爆炸结构示意图；
图3为图1的扬声器沿A-A向线的剖面示意图；
图4为本申请第一实施例的球顶的结构示意图；
图5为本申请第二实施例的球顶的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请中的术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括至少一个该特征。本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。本申请实施例中所有方向性指示（诸如上、下、左、右、前、后……）仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
图1是本申请实施例的扬声器的立体结构示意图，图2是本申请实施例的扬声器的爆炸结构示意图，图3是图1的扬声器沿A-A向线的剖面示意图，如图1至图3所示，该扬声器100包括具有收容空间11的盆架10、固定于盆架10内的磁路系统20和振动系统30。其中，磁路系统20包括磁碗21、设于磁碗21上的磁钢22以及贴设于磁钢22表面的极芯23。磁碗21和磁钢22之间形成有磁间隙24。振动系统30包括固定于盆架10上的固定架31、固定于固定架31和盆架10之间的振膜32、设于磁间隙24并驱动振膜32振动的音圈33以及设于振膜32表面上的球顶34。音圈33的一端与振膜32的一侧表面固定连接，另一端插入磁间隙24内，振膜32夹设于球顶34和音圈33之间。
图4是本申请第一实施例的球顶的结构示意图，如图4所示，球顶34包括自音圈33至振膜32方向依次层叠设置的第一散热层341和基材层342，其中，基材层342包括由发泡材料制成的发泡材料层和分散于发泡材料层中的导热材料，导热材料的热导率大于发泡材料的热导率。
与传统结构相比，本申请第一实施例在基材层342中设置导热材料且导热材料的热导率大于发泡材料的热导率，能够使音圈33产生的热量依靠基材层342中导热材料及时传导至前腔，使热量能够从前腔散发出去，提高了散热效率，避免了球顶结构的复合层由于受热变形而影响扬声器100的声学性能，提高了扬声器100的稳定性。
图5是本申请第二实施例的球顶的结构示意图，如图5所示，球顶34包括自音圈33至振膜32方向依次层叠设置的第一散热层341、基材层342以及第二散热层343，其中，基材层342包括由发泡材料制成的发泡材料层和分散于发泡材料层中的导热材料，导热材料的热导率大于发泡材料的热导率。
与传统结构相比，在第一实施例的基础上，本申请第二实施例在基材层342中设置导热材料且导热材料的热导率大于发泡材料的热导率，一方面能够使音圈33产生的热量依靠基材层342中导热材料及时传导至前腔，使热量能够从前腔散发出去，提高了散热效率，避免了球顶结构的复合层由于受热变形而影响扬声器100的声学性能，提高了扬声器100的稳定性；另一方面，还能够显著提高球顶34的刚度和强度，从而提升产品的性能和可靠性。
在上述实施例中，导热材料包括石墨烯、碳粉、石墨和金属微粒中的一种或多种。导热材料优选为石墨烯，因其具有质量轻、厚度薄、极高热导性的优点。
terephthalate，PET）是乙二醇和对苯二甲酸的缩聚反应产物，是高结晶度、高熔点的线性大分子。作为一种热塑性工程材料，PET具有良好的力学性能、电绝缘性、耐化学药品性及耐蠕变、耐疲劳及耐摩擦等特性。未发泡PET为实心材料，密度约为1.4 g/cm 进一步地，发泡材料包括聚对苯二甲酸乙二醇酯、聚甲基丙烯酰亚胺、聚酰亚胺、聚丙烯和聚苯硫醚中的一种或多种。发泡材料优选为聚对苯二甲酸乙二醇酯。聚对苯二甲酸乙二醇酯（polyethylene 3左右，未发泡PET与发泡PMI材料相比具有较大的密度，发泡材料层为PET经发泡成型制造形成的聚对苯二甲酸乙二醇酯发泡体（PET发泡体），在该发泡材料层的内部大量含有微细气孔，该气孔的平均孔径为20μm以下。为了不影响声音的传播，各气孔间相互不连通，为相互独立的气孔。在一个优选地实施例中，球顶34通过将PET发泡体与导热材料进行复合，使得上述实施例的球顶34的导热性能得到很大提升，同时，由于PET发泡体的防水性能，在保证产品强度的同时还提升了产品的防水等级。
进一步地，导热材料在基材层342中以导热微粒的形式分散在发泡材料中。由于发泡材料层中的气孔为闭孔，不能导热，本实施例通过导热微粒将热量传导至前腔。更进一步地，导热材料的粒径为5～20μm。发泡材料层中导热材料的质量分数为10%～30%。上述实施例可以通过调整导热材料的粒径和发泡材料层中导热材料的质量分数来控制基材层342的导热效率。
上述本实施例中，第一散热层341包括铝箔层、铝合金层和碳纤维层中的一种，第二散热层343包括铝箔层、铝合金层和碳纤维层中的一种。第一散热层341和第二散热层343的材料可以相同或不同。优选地，第一散热层341和第二散热层343均为铝合金层。铝合金层具有较好的导热性和较轻的质量，同时具有一定的硬度，在一个优选地实施例中，当第一散热层341和第二散热层343均为铝合金层时，球顶34通过基材层342与第一散热层341、第二散热层343进行复合，能够获得较优的导热性能的同时提高了刚度和强度。另一些实施例中，第一散热层341和/或第二散热层343为铝箔层，铝箔虽兼顾良好的导热性和质量轻，但是硬度不足，难以加工且应用于球顶34上容易变形，影响产品的性能和可靠性。还有一些实施例中，第一散热层341和/或第二散热层343为碳纤维层，碳纤维层包括至少两层碳纤维单向带预浸料，碳纤维单向带预浸料包括碳纤维单向带和预浸树脂，该碳纤维单向带预浸料中的碳纤维材料单向延伸，该碳纤维单向带预浸料可以采用以下方式获得：将热固性的预浸树脂浸渍或喷涂在碳纤维单向带上，再经高温高压处理后形成的在碳纤维单向带上有预浸树脂固化物的碳纤维单向带浸渍材料，该碳纤维层的碳纤维单向带预浸料可以在纤维延伸方向，即纤维方向能够承受较大受力，在纤维方向垂直的方向上能够承受较弱受力，但通过与预浸树脂固化后大大增强承受力的能力。碳纤维材料虽比铝合金的质量轻，但是导热性不如铝合金且成本比较高。
在一个实施例中，球顶34的厚度为0.06～0.53mm；更进一步地，基材层342的厚度为0.05mm～0.5mm。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

1、一种球顶，其特征在于，所述球顶包括层叠设置的第一散热层和基材层，所述基材层包括由发泡材料制成的发泡材料层和分散于所述发泡材料层中的导热材料，所述导热材料的热导率大于所述发泡材料的热导率。
2、根据权利要求1所述的球顶，其特征在于，所述导热材料包括石墨烯、碳粉、石墨和金属微粒中的一种或多种。
3、根据权利要求2所述的球顶，其特征在于，所述导热材料的粒径为5～20μm。
4、根据权利要求1所述的球顶，其特征在于，所述发泡材料层中所述导热材料的质量分数为10%～30%。
5、根据权利要求1所述的球顶，其特征在于，所述发泡材料包括聚对苯二甲酸乙二醇酯、聚甲基丙烯酰亚胺、聚酰亚胺、聚丙烯和聚苯硫醚中的一种或多种。
6、根据权利要求1所述的球顶，其特征在于，所述球顶还包括叠设于所述基材层远离所述第一散热层一侧表面的第二散热层。
7、根据权利要求6所述的球顶，其特征在于，所述第一散热层和所述第二散热层分别为铝箔层、铝合金层和碳纤维层中的一种。
8、根据权利要求1所述的球顶，其特征在于，所述基材层的厚度为0.05mm～0.5mm。
9、根据权利要求1所述的球顶，其特征在于，所述球顶的厚度为0.06～0.53mm。
10、一种扬声器，其特征在于，所述扬声器包括如权利要求1至9任一项所述的球顶。
PCT/CN2020/103247 2020-06-29 2020-07-21 球顶及扬声器 WO2022000611A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020069511A1 (en) * 2000-12-11 2002-06-13 Alps Electric Co., Ltd. Method for manufacturing exchange bias type magnetic field sensing element
US20150273524A1 (en) * 2014-03-27 2015-10-01 Apple Inc. Acoustic modules
CN204707266U (zh) * 2015-03-30 2015-10-14 歌尔声学股份有限公司 一种多层复合Dome以及应用该Dome的多层复合Dome扬声器
CN204810540U (zh) * 2015-07-10 2015-11-25 瑞声光电科技(常州)有限公司 微型扬声器振膜
CN111065028A (zh) * 2019-12-27 2020-04-24 歌尔股份有限公司 振膜球顶、振膜及扬声器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207413B2 (en) * 2003-06-02 2007-04-24 Tbi Audio Systems Llc Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems
CN202535521U (zh) * 2012-03-19 2012-11-14 歌尔声学股份有限公司 微型扬声器振膜
CN106412775A (zh) * 2016-09-27 2017-02-15 常州阿木奇声学科技有限公司 一种电声换能器用的球顶及电声换能器
CN207321533U (zh) * 2017-02-20 2018-05-04 歌尔科技有限公司 用于扬声器振膜的结合层及包含该结合层的扬声器振膜
CN111263280A (zh) * 2020-03-13 2020-06-09 歌尔股份有限公司 球顶和扬声器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020069511A1 (en) * 2000-12-11 2002-06-13 Alps Electric Co., Ltd. Method for manufacturing exchange bias type magnetic field sensing element
US20150273524A1 (en) * 2014-03-27 2015-10-01 Apple Inc. Acoustic modules
CN204707266U (zh) * 2015-03-30 2015-10-14 歌尔声学股份有限公司 一种多层复合Dome以及应用该Dome的多层复合Dome扬声器
CN204810540U (zh) * 2015-07-10 2015-11-25 瑞声光电科技(常州)有限公司 微型扬声器振膜
CN111065028A (zh) * 2019-12-27 2020-04-24 歌尔股份有限公司 振膜球顶、振膜及扬声器

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