WO2015180289A1 - 扬声器振膜 - Google Patents

扬声器振膜 Download PDF

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Publication number
WO2015180289A1
WO2015180289A1 PCT/CN2014/086109 CN2014086109W WO2015180289A1 WO 2015180289 A1 WO2015180289 A1 WO 2015180289A1 CN 2014086109 W CN2014086109 W CN 2014086109W WO 2015180289 A1 WO2015180289 A1 WO 2015180289A1
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WO
WIPO (PCT)
Prior art keywords
layer
base
base layer
speaker
surface layer
Prior art date
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
Application number
PCT/CN2014/086109
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English (en)
French (fr)
Inventor
刘学路
杨健斌
王婷
江超
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Goertek Inc
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Goertek Inc
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Publication date
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Priority to KR1020167028699A priority Critical patent/KR101858380B1/ko
Priority to US15/313,937 priority patent/US9955266B2/en
Publication of WO2015180289A1 publication Critical patent/WO2015180289A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of 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
    • 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
    • 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
    • H04R7/12—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; 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
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials

Definitions

  • the utility model relates to the technical field of loudspeakers, and more particularly to a loudspeaker diaphragm.
  • the speaker plays an indispensable role in the sound system.
  • the speaker In a sound system, the speaker is the weakest device, and it is the most important component for the sound system of the sound system.
  • the audio power passes through electromagnetic, piezoelectric or electrostatic effects, causing the cone or diaphragm to vibrate and resonate (resonate) with the surrounding air to make a sound. Therefore, it is with the appearance of the speakers that people can hear the beautiful sound.
  • the diaphragm of the traditional microspeaker is made of a core layer between two layers of the same or different characteristics.
  • the material of the two-layer film is mostly selected from polyetheretherketone, and the middle core layer is generally made of acrylic rubber to achieve various choices of acoustic performance of the speaker.
  • the currently available composite film method and the toughness of the polyetheretherketone are difficult to meet the requirements.
  • the object of the present invention is to provide a speaker diaphragm which can increase the acoustic properties of the microspeaker while increasing the toughness of the diaphragm and improve the diaphragm rupture of the speaker product after the power test. Problems, improve product reliability.
  • the speaker diaphragm provided by the utility model comprises a first surface layer, an intermediate layer and a second surface layer in a laminated structure, and at least one of the first surface layer and the second surface layer is a composite of a base layer and a reinforcing layer a structure, the other surface layer comprising at least one base layer; and the base layer is a polyetheretherketone layer, a polyarylate layer, a polyethylene terephthalate layer, a polyetherimide layer or any two of them Composite structure; the reinforcing layer is a thermoplastic polyurethane elastomer layer or a thermoplastic elastomer layer.
  • a preferred structure is that one of the first surface layer and the second surface layer is combined with the voice coil of the speaker.
  • a preferred structure is that the surface layer combined with the voice coil of the speaker is combined with the voice coil through its base layer.
  • a preferred structure is that when the other surface layer includes only one base layer, the stacking order of the speaker diaphragms is:
  • Base layer reinforcement layer, intermediate layer, base layer; or,
  • Strengthening layer base layer, intermediate layer, base layer; or,
  • Base layer intermediate layer, base layer, reinforcement layer; or,
  • first surface layer and the second surface layer are both a composite structural intermediate layer of the base layer and the reinforcing layer.
  • a preferred configuration is that the stacking order of the speaker diaphragms is:
  • Base layer reinforcement layer, intermediate layer, base layer, reinforcement layer; or
  • Base layer reinforcement layer, intermediate layer, reinforcement layer, base layer; or
  • Reinforcement layer base layer, intermediate layer, reinforcement layer, base layer.
  • the intermediate layer is an acrylic layer.
  • a preferred structure is that when the surface layer is a combination of the base layer and the reinforcing layer, the base layer is respectively thermally bonded to the corresponding reinforcing layer.
  • first surface layer and the second surface layer have a thickness of 2 to 30 ⁇ m, respectively.
  • the reinforcing layer has a thickness of 5 to 40 ⁇ m and a hardness of 60 to 95 A.
  • FIG. 1 is a schematic structural view of a speaker diaphragm according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural view of a speaker diaphragm according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural view of a speaker diaphragm according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural view of a speaker diaphragm according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural view of a speaker diaphragm according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a speaker diaphragm according to an embodiment of the present invention.
  • Reference numerals therein include a base layer 1, a polyetheretherketone layer 11, a polyarylate layer 12, an intermediate layer 2, a reinforcing layer 3, a thermoplastic polyurethane elastomer layer 31, and a voice coil 4.
  • 1 to 4 respectively show the structure of a speaker diaphragm of an embodiment of the present invention from different structural forms.
  • a speaker diaphragm includes a surface layer and an intermediate layer 2, wherein the surface layer includes a first surface layer and a second surface layer, and the first surface layer and the intermediate layer 2
  • the second surface layer is combined with the second surface layer, wherein the first surface layer and the second surface layer are respectively located on two sides of the intermediate layer 2, and the surface layer combined with the voice coil 4 of the speaker may be the first surface layer or It is the second surface layer.
  • the first surface layer and the second surface layer is a composite structure of the base layer 1 and the reinforcement layer 3, and the other surface layer includes at least one base layer 1, that is, another The surface layer may be a base layer 1 or a composite structure of the base layer 1 and the reinforcement layer 3.
  • the base layer 1 is a PEEK (polyether ether ketone) layer 11, a PAR (polyarylate) layer 12, a PET (polyethylene terephthalate) layer, a PEI (polyetherimide) layer or Any two composite structures.
  • the reinforcing layer 3 is a TPU (thermoplastic polyurethane elastomer) layer 31 or a TPE (thermoplastic bomb)
  • the layer 2 is an acrylic layer.
  • each layer of the speaker diaphragm has the following four cases: base layer 1, reinforcing layer 3, intermediate layer 2, and base layer 1 Or, reinforcement layer 3, base layer 1, intermediate layer 2, base layer 1; or, base layer 1, intermediate layer 2, base layer 1, reinforcement layer 3; or, base layer 1, intermediate layer 2, reinforcement layer 3 , the base layer 1.
  • the stacking manner of the layers of the speaker diaphragm has the following four cases: the base layer 1, the reinforcing layer 3, and the intermediate layer 2.
  • one of the first surface layer or the second surface layer is combined with the voice coil 4 of the speaker during installation and use. That is to say, in combination with the voice coil 4, it may be the base layer 1 in the surface layer or the reinforcing layer 3 in the surface layer.
  • a preferred structure among them is that the side of the base layer 1 in the surface layer is combined with the voice coil 4 of the speaker.
  • the reinforcing layer 3 is combined with the intermediate layer 2 or the base layer 1 is combined with the intermediate layer 2, wherein a preferred structure is a surface layer
  • the reinforcing layer 3 in the middle is combined with the intermediate layer 2.
  • the material of the base layer 1 is a composite structure of one or two of polyetheretherketone, polyetherimide, polyethylene terephthalate and polyarylate;
  • the material of the reinforcing layer 3 is thermoplastic a polyurethane elastomer or a thermoplastic elastomer;
  • the intermediate layer 2 is located between the first surface layer and the second surface layer of the diaphragm, and the material of the intermediate layer 2 is acrylic glue.
  • the first surface layer or the second surface layer is a combination of the base layer 1 and the reinforcing layer 3
  • the base layer 1 is respectively combined with the corresponding reinforcing layer 3 by thermal composite.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the speaker diaphragm in this embodiment includes a first surface layer, a second surface layer, and an intermediate layer 2, wherein the first surface layer and the second surface layer are positioned above and below the intermediate layer 2,
  • a layer close to the speaker voice coil 4 can make the first surface layer also make the second surface layer.
  • a surface layer remote from the speaker voice coil 4 is only the base layer 1
  • the other surface layer of the near voice coil 4 is a composite structure of the base layer 1 and the reinforcing layer 3.
  • the reinforcing layer 3 in one surface layer close to the voice coil 4 is combined with the speaker voice coil 4, the base layer 1 is combined with the intermediate layer 2, and the base layer 1 and the reinforcing layer 3 are combined by thermal lamination or other means.
  • the base layer 1 is a PEEK (polyether ether ketone) layer 11, a PAR (polyarylate) layer 12, a PET (polyethylene terephthalate) layer, a PEI (polyetherimide) layer or Any two composite structures.
  • the reinforcing layer is a TPU (thermoplastic polyurethane elastomer) layer 31 or a TPE (thermoplastic elastomer) layer;
  • the intermediate layer 2 is an acrylic rubber layer.
  • the diaphragm of the structure increases the toughness of the base layer of the speaker diaphragm by adding a reinforcing layer thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPE).
  • TPU thermoplastic polyurethane elastomer
  • TPE thermoplastic elastomer
  • the base layer material has good elasticity and mechanical strength, and is combined with the reinforcing layer. Improves the acoustic performance of the speaker diaphragm.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the speaker diaphragm in this embodiment is similar to the diaphragm structure of the embodiment.
  • a surface layer away from the speaker voice coil 4 is only the base layer 1, and is close to
  • the other surface layer of the voice coil 4 is a composite structure of the base layer 1 and the reinforcing layer 3.
  • the base layer 1 in one surface layer close to the voice coil 4 is combined with the speaker voice coil 4, and the reinforcing layer 3 is combined with the intermediate layer 2.
  • the base layer 1 is a PEEK (polyether ether ketone) layer, a PAR (polyarylate) layer, a PET (polyethylene terephthalate) layer, a PEI (polyetherimide) layer, or any two of them.
  • the reinforcing layer 3 is a TPU (thermoplastic polyurethane elastomer) layer or a TPE (thermoplastic elastomer) layer; the intermediate layer is an acrylic rubber layer.
  • the intermediate layer base layer 1 in a surface layer close to the voice coil 4 is thermally compounded with the reinforcing layer 3.
  • the diaphragm of this structure bonds the side of the base layer 1 in one surface layer with the voice coil to improve the adhesion of the diaphragm and the voice coil, and to ensure the adhesion between the two.
  • one side of the thermoplastic polyurethane elastomer (TPU) or the thermoplastic elastomer (TPE) is in contact with the acrylic rubber of the intermediate layer to strengthen the toughness of the base layer, thereby preventing the phenomenon that the base product is broken after the power test is performed, and the phenomenon is improved. Product reliability.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • both surface layers of the speaker diaphragm in this embodiment are a composite structure of the base layer 1 and the reinforcing layer 3, wherein the base layer 1 and the intermediate layer 2 of one surface layer of the diaphragm The acrylic adhesive is bonded, and the base layer 1 of the other surface layer is in contact with the voice coil 4.
  • the base layer 1 is polyetheretherketone (PEEK), polyetherimide (PEI), polyethylene terephthalate (PET), polyfang A film in the ester (PAR) or a composite structure of any two
  • the reinforcing layer 2 is made of a thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPE).
  • the diaphragm of this structure is provided with a reinforcing layer 3 in both the first surface layer and the second surface layer to form a 5-layer film structure, which can effectively improve the acoustic performance of the speaker product.
  • the side of the base layer in the surface layer of the diaphragm is bonded to the voice coil, and at the same time, one of the reinforcing layers 3 in the surface layer is made.
  • the acrylic adhesive on the side and the intermediate layer 2 increases the toughness of the base layer 1, and while ensuring the acoustic performance of the speaker, the damage in the speaker experiment is reduced, and the reliability of the product is improved.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the speaker diaphragm in this embodiment includes a total of five layers, wherein the first surface layer and the second surface layer are both thermally composited by the base layer 1 and the reinforcing layer 3, wherein the two surface layers are formed.
  • the reinforcing layers 3 are all bonded to the acrylic glue of the intermediate layer 2, wherein the base layer 1 of one surface layer is in contact with the voice coil 4.
  • the base layer 1 is a film of polyetheretherketone (PEEK), polyetherimide (PEI), polyethylene terephthalate (PET), polyarylate (PAR) or any two
  • PEEK polyetheretherketone
  • PEI polyetherimide
  • PET polyethylene terephthalate
  • PAR polyarylate
  • the composite structure of the reinforcing layer 3 is a thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPE).
  • the speaker diaphragm of this structure bonds the base layer and the voice coil to ensure the adhesion between the voice coil and the diaphragm, and at the same time, the reinforcing layer is bonded to the acrylic layer of the intermediate layer to strengthen the toughness of the base layer. Strength, improve the performance of the diaphragm.
  • FIG. 5 and 6 respectively show a specific structure of a speaker diaphragm according to an embodiment of the present invention.
  • the speaker diaphragm in this embodiment includes a total of four layers, wherein one surface layer away from the speaker voice coil is a film structure, which is made of PEEK 11 and another surface.
  • the layer is a composite structure of the polyarylate layer 12 and the thermoplastic polyurethane elastomer layer 31, that is, in the surface layer of the structure, the base layer is a PAR (polyarylate) layer 12, and the reinforcing layer is a TPU (thermoplastic polyurethane elastomer) layer. 31.
  • the speaker diaphragm in this embodiment includes a total of five layers, wherein the first surface layer and the second surface layer are both a composite structure of the base layer 1 and the reinforcement layer 3, and one of the sound coils away from the speaker
  • the base layer is a PEEK (polyether ether ketone) layer 11
  • the base layer in the other surface layer is a PAR (polyarylate) layer 12.
  • the reinforcing layer material is a thermoplastic polyurethane elastomer (TPU) 31, and the intermediate layer 2 is made of an acrylic rubber.
  • the TPU is in a molten state at a high temperature, which is equivalent to A colloid, combined with other layers of materials, can increase the damping characteristics of the diaphragm.
  • the material of the reinforcing layer 3 is generally selected from a thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPE), and other materials can be used as well.
  • the intermediate layer can also be used with colloids of other materials.
  • the base layer is made of polyetheretherketone (PEEK), polyetherimide (PEI), polyethylene terephthalate (PET), polyarylate (PAR), or any two of them. Composite structure, but does not exclude other materials that meet the product requirements.
  • the thickness of the base layer is preferably 2 to 30 ⁇ m.
  • the front and back signs should be marked to prevent the order from being reversed during the installation process, which affects the adhesion between the diaphragm and the voice coil, thereby reducing the acoustic performance of the speaker product.
  • the speaker diaphragm provided by the present invention combines the base layer and the reinforcing layer as a base material of the composite diaphragm to increase the toughness and strength of the diaphragm, and prevent the diaphragm of the speaker product after the power test. Cracking of the substrate improves product reliability and acoustic performance.

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

Abstract

本发明提供一种扬声器振膜，包括呈层叠结构的第一表面层、中间层和第二表面层，其特征在于，第一表面层和第二表面层中的至少一个表面层为基础层和加强层的复合结构，另一个表面层至少包括一层基础层；并且，基础层为聚醚醚酮层、聚芳酯层、聚对苯二甲酸乙二醇酯层、聚醚酰亚胺层或者其中任意两种的复合结构；加强层为热塑性聚氨酯弹性体层或者热塑性弹性体层。上述扬声器振膜能够在改善扬声器产品功率实验后振膜破裂问题的同时，增加基材的韧性，提高扬声器的声学性能。

Description

扬声器振膜 技术领域
本实用新型涉及扬声器技术领域，更为具体地，涉及一种扬声器振膜。
背景技术
扬声器作为将电能转变为声能的常用电声换能器件，其在声放系统中起着不可或缺的作用。在声放系统中，扬声器是一个最薄弱的器件，而对于声放系统的声放效果而言，它又是一个最重要的部件。扬声器的种类繁多，音频电能通过电磁、压电或静电效应，使其纸盆或膜片振动并与周围的空气产生共振(共鸣)而发出声音。因此，正是有了扬声器的出现，人们才得以听到美妙声音。
振膜作为扬声器中的发声部件，其结构和材质对扬声器的发声效果均具有举足轻重的地位，传统微型扬声器的振膜是由特性相同或者不相同的两层薄膜之间加芯层制作而成，两层薄膜的材质多选用聚醚醚酮，中间的芯层一般选用丙烯酸胶的材质，以实现扬声器声学性能的多种选择。但是随着微型扬声器对声学性能要求的进一步提高，目前可以选择的复合薄膜方式及聚醚醚酮的韧性都很难满足其要求。
实用新型内容
鉴于上述问题，本实用新型的目的是提供一种扬声器振膜，采用这种振膜能够在保证微型扬声器的声学性能的同时，增加振膜的韧性，改善扬声器产品在功率实验后振膜破裂的问题，提高产品的可靠性。
本实用新型提供的扬声器振膜，包括呈层叠结构的第一表面层、中间层和第二表面层，第一表面层和第二表面层中的至少一个表面层为基础层和加强层的复合结构，另一个表面层至少包括一层基础层；并且，基础层为聚醚醚酮层、聚芳酯层、聚对苯二甲酸乙二醇酯层、聚醚酰亚胺层或者其中任意两种的复合结构；加强层为热塑性聚氨酯弹性体层或者热塑性弹性体层。
此外，优选的结构是，第一表面层和第二表面层中的一个表面层与扬声器的音圈相结合。
此外，优选的结构是，与扬声器的音圈结合的表面层通过其基础层与音圈相结合。
此外，优选的结构是，在另一个表面层只包括一层基础层时，扬声器振膜的层叠顺序为：
基础层、加强层、中间层、基础层；或者，
加强层、基础层、中间层、基础层；或者，
基础层、中间层、基础层、加强层；或者，
基础层、中间层、加强层、基础层。中间层
此外，优选的结构是，第一表面层和第二表面层均为基础层和加强层的复合结构中间层。
此外，优选的结构是，扬声器振膜的层叠顺序为：
基础层、加强层、中间层、基础层、加强层；或者，
基础层、加强层、中间层、加强层、基础层；或者，
加强层、基础层、中间层、基础层、加强层；或者，
加强层、基础层、中间层、加强层、基础层。
此外，优选的结构是中间层为丙烯酸胶层。
此外，优选的结构是，在表面层为基础层与加强层的结合时，基础层分别与相对应的加强层通过热复合结合。
此外，优选的结构是，第一表面层和第二表面层的厚度分别为2～30μm。
此外，优选的结构是，加强层的厚度为5～40μm，硬度为邵氏硬度60～95A。
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，并且随着对本实用新型的更全面理解，本实用新型的其它目的及结果将更加明白及易于理解。在附图中：
图1为根据本实用新型实施例一的扬声器振膜的结构示意图；
图2为根据本实用新型实施例二的扬声器振膜的结构示意图；
图3为根据本实用新型实施例三的扬声器振膜的结构示意图；
图4为根据本实用新型实施例四的扬声器振膜的结构示意图；
图5为根据本实用新型实施例的扬声器振膜的结构示意图；
图6为根据本实用新型实施例的扬声器振膜的结构示意图。
其中的附图标记包括：基础层1、聚醚醚酮层11、聚芳酯层12、中间层2、加强层3、热塑性聚氨酯弹性体层31、音圈4。
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
下面结合附图和具体实施例对本实用新型做进一步详细的描述。
在下面的描述中，只通过说明的方式对本实用新型的某些示范实施例进行描述，毋庸置疑，本领域的普通技术人员可以认识到，在不偏离本实用新型的精神和范围的情况下，可以用各种不同方式对所述的实施方案进行改变。因此，附图和描述在本质上只是说明性的，而不是用于限制权利要求的保护范围。此外，在本说明书中，相同的附图标记标示相同的部分。
图1至图4分别从不同结构形式示出了本实用新型实施例的扬声器振膜的结构。
如图1至图4所示，根据本实用新型实施例的扬声器振膜，包括表面层和中间层2，其中表面层包括第一表面层和第二表面层，第一表面层、中间层2和第二表面层呈层叠方式结合，其中，第一表面层和第二变面层分别位于中间层2的两侧，与扬声器的音圈4相结合的表面层可以是第一表面层也可以是第二表面层。
需要说明的是，第一表面层和第二表面层中至少有一个表面层为基础层1和加强层3的复合结构，另外的一个表面层至少包括一层基础层1，也就是说另外一个表面层可以为一层基础层1，也可以为基础层1与加强层3的复合结构。并且，基础层1为PEEK(聚醚醚酮)层11、PAR(聚芳酯)层12、PET(聚对苯二甲酸乙二醇酯)层、PEI(聚醚酰亚胺)层或者其中任意两种的复合结构。加强层3为TPU(热塑性聚氨酯弹性体)层31或者TPE(热塑性弹 性体)层；中间层2为丙烯酸胶层。
其中，在两个表面层中的一个表面层只包括一层基础层1时，扬声器振膜各层的层叠方式有以下4种情况：基础层1、加强层3、中间层2、基础层1；或者，加强层3、基础层1、中间层2、基础层1；或者，基础层1、中间层2、基础层1、加强层3；或者，基础层1、中间层2、加强层3、基础层1。
在第一表面层和第二表面层均为基础层1与加强层3的复合结构时，扬声器振膜各层的层叠方式存在以下4种情况：基础层1、加强层3、中间层2、基础层1、加强层3；或者，基础层1、加强层3、中间层2、加强层3、基础层1；或者，加强层3、基础层1、中间层2、基础层1、加强层3；或者，加强层3、基础层1、中间层2、加强层3、基础层1。
根据本实用新型提供的扬声器振膜在安装使用过程中，第一表面层或者第二表面层中的一个表面层与扬声器的音圈4相结合。也就是说，与音圈4相结合的可以是表面层中的基础层1，也可以是表面层中的加强层3。其中优选的结构是，表面层中的基础层1一侧与扬声器的音圈4结合。在第一表面层和第二表面层均为基础层1与加强层3的复合结构时，加强层3与中间层2结合或者基础层1与中间层2结合，其中优选的结构是，表面层中的加强层3与中间层2结合。
其中，基础层1的材质为聚醚醚酮、聚醚酰亚胺、聚对苯二甲酸乙二醇酯、聚芳酯中的一种或者两种的复合结构；加强层3的材质为热塑性聚氨酯弹性体或者热塑性弹性体；中间层2位于振膜的第一表面层和第二表面层之间，中间层2的材质为丙烯酸胶。其中，在第一表面层或者第二表面层为基础层1与加强层3的结合时，基础层1分别与相对应的加强层3通过热复合结合。
通过以下几种具体实施例对本实用新型提供的扬声器振膜进行更详细的解释说明。
实施例一：
如图1所示，本实施例中的扬声器振膜包括第一表面层、第二表面层和中间层2，其中，第一表面层和第二表面层相对于中间层2的上、下位置没有限制，即与靠近扬声器音圈4的一层可以使第一表面层也可以使第二表面层。在该实施例中，远离扬声器音圈4的一个表面层为只有基础层1的情况，靠 近音圈4的另一个表面层为基础层1与加强层3的复合结构。其中，靠近音圈4的一个表面层中的加强层3与扬声器音圈4结合，基础层1与中间层2结合，基础层1与加强层3之间通过热复合或者其他方式进行结合。
其中，基础层1为PEEK(聚醚醚酮)层11、PAR(聚芳酯)层12、PET(聚对苯二甲酸乙二醇酯)层、PEI(聚醚酰亚胺)层或者其中任意两种的复合结构。加强层为TPU(热塑性聚氨酯弹性体)层31或者TPE(热塑性弹性体)层；中间层2为丙烯酸胶层。
种结构的振膜，通过加入加强层热塑性聚氨酯弹性体(TPU)或者热塑性弹性体(TPE)，增加扬声器振膜基础层的韧性，此外，基础层材料的弹性和机械强度良好，与加强层结合可提升扬声器振膜的声学性能。
实施例二：
如图2所示，本实施例中的扬声器振膜与实施例一种的振膜结构相类似，在该实施例中，远离扬声器音圈4的一个表面层为只有基础层1的情况，靠近音圈4的另一个表面层为基础层1与加强层3的复合结构。其中，靠近音圈4的一个表面层中的基础层1与扬声器音圈4结合，加强层3则与中间层2结合。基础层1为PEEK(聚醚醚酮)层、PAR(聚芳酯)层、PET(聚对苯二甲酸乙二醇酯)层、PEI(聚醚酰亚胺)层或者其中任意两种的复合结构。加强层3为TPU(热塑性聚氨酯弹性体)层或者TPE(热塑性弹性体)层；中间层为丙烯酸胶层。靠近音圈4的一个表面层中的中间层基础层1与加强层3热复合在一起。
这种结构的振膜将一个表面层中的基础层1一侧与音圈进行粘接，提高振膜与音圈粘接的牢固度，保证二者之间的粘接力。此外，热塑性聚氨酯弹性体(TPU)或者热塑性弹性体(TPE)的一侧与中间层的丙烯酸胶接触，加强基础层的韧性，防止扬声器产品在进行功率实验后基础层发生破膜的现象，提高产品的可靠性。
实施例三：
如图3所示，在本实施例中的扬声器振膜的两个表面层均为基础层1与加强层3的复合结构，其中，振膜的一个表面层的基础层1与中间层2的丙烯酸胶粘接，另一个表面层的基础层1与音圈4接触。其中，基础层1为聚醚醚酮(PEEK)、聚醚酰亚胺(PEI)、聚对苯二甲酸乙二醇酯(PET)、聚芳 酯(PAR)中的一种薄膜或者任意两种的复合结构，加强层2的材质为热塑性聚氨酯弹性体(TPU)或者热塑性弹性体(TPE)。
这种结构的振膜，在第一表面层和第二表面层中均加入加强层3，形成5层膜的结构，能够有效的提高扬声器产品的声学性能。
此外，考虑粘接牢固度问题，在本实用新型的一个优选实施方式中，振膜的表面层中的基础层一侧与音圈进行粘接，同时，使表面层中的加强层3的一侧与中间层2的丙烯酸胶粘接，增加基础层1的韧性，在保证扬声器声学性能的同时，减少扬声器实验中的损坏，提高产品的可靠性。
实施例四：
如图4所示，本实施例中的扬声器振膜共包括5层，其中第一表面层和第二表面层均是由基础层1和加强层3热复合而成，其中，两个表面层中的加强层3均与中间层2的丙烯酸胶粘接，其中一个表面层的基础层1与音圈4接触。同样，基础层1为聚醚醚酮(PEEK)、聚醚酰亚胺(PEI)、聚对苯二甲酸乙二醇酯(PET)、聚芳酯(PAR)中的一种薄膜或者任意两种的复合结构，加强层3的材质为热塑性聚氨酯弹性体(TPU)或者热塑性弹性体(TPE)。
这种结构的扬声器振膜将基础层与音圈进行粘接，保证音圈与振膜之间的粘接牢固度，同时，加强层与中间层的丙烯酸胶粘接，加强基础层的韧性和强度，提升振膜的性能。
图5和图6分别示出了根据本实用新型实施例的扬声器振膜的具体结构。
如图5所示，本实施例中的扬声器振膜共包括4层，其中，远离扬声器音圈的一个表面层为一层膜的结构，材质为PEEK(聚醚醚酮)11，另外一个表面层为聚芳酯层12与热塑性聚氨酯弹性体层31的复合结构，即在该符合结构的表面层中基础层为PAR(聚芳酯)层12，加强层为TPU(热塑性聚氨酯弹性体)层31。
如图6所示，本实施例中的扬声器振膜共包括5层，其中，第一表面层和第二表面层均为基础层1与加强层3的复合结构，在远离扬声器音圈的一个表面层中，基础层为PEEK(聚醚醚酮)层11，另外一个表面层中的基础层为PAR(聚芳酯)层12。其中的加强层材质为热塑性聚氨酯弹性体(TPU)31，中间层2的材质为丙烯酸胶。
在上述各实施例中，需要说明的是，TPU高温下即为熔融状态，相当于 一种胶体，与其他各层材料结合可以增加振膜的阻尼特性，加强层3的材质一般选用热塑性聚氨酯弹性体(TPU)或者热塑性弹性体(TPE)，除此之外也可以选用其他满足使用要求的材料，中间层也可使用其它材料的胶体。加强层的厚度的优选范围为5～40μm(1000μm＝1mm)，邵氏硬度为60～95A。基础层的材质为聚醚醚酮(PEEK)、聚醚酰亚胺(PEI)、聚对苯二甲酸乙二醇酯(PET)、聚芳酯(PAR)其中的一种或者任意两种的复合结构，但是也不排除其他能够满足产品要求的材料。基础层的厚度优选为2～30μm。
此外，本实用新型中仅示出了几种振膜的结构形式，在保证扬声器产品的质量和性能的同时，也可以对基础层和加强层进行其他方式的组合和其他材料的选用。
在使用根据本使用新型提供的扬声器振膜时，要做好正反面的标示，防止安装过程中顺序颠倒，而影响振膜与音圈之间的粘接力，进而降低扬声器产品的声学性能。
通过上述实施方式可以看出，本实用新型提供的扬声器振膜，通过将基础层与加强层相结合作为复合振膜的基材，增加振膜的韧性和强度，防止扬声器产品功率试验后振膜基材的破裂，提高产品的可靠性和声学性能。
如上参照附图以示例的方式描述了根据本实用新型提出的扬声器振膜。但是，本领域技术人员应当理解，对于上述本实用新型所提出的扬声器振膜，还可以在不脱离本实用新型内容的基础上做出其他改进和变形，而这些改进和变形，都落在本实用新型的保护范围内，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实用新型的目的，本实用新型的保护范围由权利要求及其等同物限定。

Claims (10)

  1. 一种扬声器振膜，包括呈层叠结构的第一表面层、中间层和第二表面层，其特征在于，
    所述第一表面层和所述第二表面层中的至少一个表面层为基础层和加强层的复合结构，另一个表面层至少包括一层基础层；并且，
    所述基础层为聚醚醚酮层、聚芳酯层、聚对苯二甲酸乙二醇酯层、聚醚酰亚胺层或者其中任意两种的复合结构；
    所述加强层为热塑性聚氨酯弹性体层或者热塑性弹性体层。
  2. 如权利要求1所述的扬声器振膜，其特征在于，第一表面层和第二表面层中的一个表面层与扬声器的音圈相结合。
  3. 如权利要求2所述的扬声器振膜，其特征在于，
    与扬声器的音圈结合的表面层通过其基础层与所述音圈相结合。
  4. 如权利要求1所述的扬声器振膜，其特征在于，在另一个表面层只包括一层基础层时，所述扬声器振膜的层叠顺序为：
    基础层、加强层、中间层、基础层；或者，
    加强层、基础层、中间层、基础层；或者，
    基础层、中间层、基础层、加强层；或者，
    基础层、中间层、加强层、基础层。
  5. 如权利要求1所述的扬声器振膜，其特征在于，所述第一表面层和第二表面层均为基础层和加强层的复合结构。
  6. 如权利要求5所述的扬声器振膜，其特征在于，所述扬声器振膜的层叠顺序为：
    基础层、加强层、中间层、基础层、加强层；或者，
    基础层、加强层、中间层、加强层、基础层；或者，
    加强层、基础层、中间层、基础层、加强层；或者，
    加强层、基础层、中间层、加强层、基础层。
  7. 如权利要求1所述的扬声器振膜，其特征在于，
    所述中间层为丙烯酸胶层。
  8. 如权利要求1所述的扬声器振膜，其特征在于，
    在所述表面层为基础层与加强层的结合时，所述基础层分别与相对应的加强层通过热复合结合。
  9. 如权利要求1所述的扬声器振膜，其特征在于，所述第一表面层和第二表面层的厚度分别为2～30μm。
  10. 如权利要求1所述的扬声器振膜，其特征在于，所述加强层的厚度为5～40μm，硬度为邵氏硬度60～95A。
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