WO2020057010A1 - 发声装置以及电子设备 - Google Patents

发声装置以及电子设备 Download PDF

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Publication number
WO2020057010A1
WO2020057010A1 PCT/CN2018/125702 CN2018125702W WO2020057010A1 WO 2020057010 A1 WO2020057010 A1 WO 2020057010A1 CN 2018125702 W CN2018125702 W CN 2018125702W WO 2020057010 A1 WO2020057010 A1 WO 2020057010A1
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Prior art keywords
layer
cantilever
thermoplastic elastomer
buffer layer
edges
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Ceased
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PCT/CN2018/125702
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English (en)
French (fr)
Inventor
郭翔
徐志刚
刘春发
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Goertek Inc
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Goertek Inc
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Publication of WO2020057010A1 publication Critical patent/WO2020057010A1/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
    • 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
    • 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
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present disclosure relates to the technical field of electro-acoustic conversion, and more particularly, to a sound-emitting device and an electronic device to which the sound-emitting device is applied.
  • multiple cantilever arms of the centering support are made of the same material.
  • PI polyimide
  • PI multilayer polyimide
  • An object of the present disclosure is to provide a new technical solution of a sound generating device.
  • a sound producing device includes a vibration system and a magnetic circuit system matched with the vibration system, wherein the vibration system includes a centering support piece and a voice coil, and the centering support piece includes a central portion at a center and an edge portion at an outer periphery A support portion is provided between the central portion and the edge portion, and one end of the voice coil in the axial direction is fixed to the central portion.
  • the voice coil includes a main body portion and a lead wire drawn from the main body portion.
  • the body portion includes two opposite leading edges and two opposite free edges, the leads are led from the two leading edges, and the centering support includes two first edges corresponding to the two leading edges.
  • the support portion includes a first cantilever respectively on the two first sides and a second cantilever respectively on the two second sides, and the lead edges
  • the extending direction of the first cantilever is extended outward and fixedly connected to the first cantilever.
  • the first cantilever is provided with a buffer layer compared to the second cantilever.
  • the buffer layer is a damping rubber layer; or the buffer layer is a thermoplastic elastomer layer; or the buffer layer is a composite structure of a damping rubber layer and a thermoplastic elastomer layer.
  • the buffer layer is a damping rubber layer; or the buffer layer is a composite structure of a damping rubber layer and a thermoplastic elastomer layer; and the damping rubber layer is at least one of acrylic rubber and silicone rubber.
  • the buffer layer is a thermoplastic elastomer layer or the buffer layer is a composite structure of a damping rubber layer and a thermoplastic elastomer layer;
  • the material of the thermoplastic elastic layer includes a polyester-based thermoplastic elastomer and a polyurethane-based thermoplastic At least one of an elastomer, a polyamide-based thermoplastic elastomer, a polystyrene-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a dynamically vulcanized rubber, and a thermoplastic blend-type thermoplastic elastomer.
  • the buffer layer is a surface layer structure located on the first cantilever.
  • the first cantilever and the second cantilever include a first plastic substrate layer, and the first cantilever further includes a buffer layer covering the first plastic substrate layer and covering the buffer layer. Second plastic substrate layer.
  • each of the first sides includes a first cantilever, and the two first cantilevers are symmetrically disposed with respect to the geometric center of the centering branch.
  • each of the first sides includes one of the first cantilevers
  • each of the second sides includes two of the second cantilevers
  • the cantilevers are symmetrical to each other with respect to the middle perpendicular of the second side.
  • the material of at least one of the first plastic substrate layer and the second plastic substrate layer is at least one of PI, PU, PEI, PEEK, PPS, and PEN.
  • an electronic device includes a device case and the above-mentioned sound generating device, and the sound generating device is disposed in the device case.
  • the sound generating device has a feature of good reliability.
  • FIG. 1 is an exploded view of a sound generating device according to an embodiment of the present disclosure.
  • 2-3 are cross-sectional views of a first cantilever according to an embodiment of the present disclosure.
  • FIG. 4 is an assembly view of a centering leg and a coil according to an embodiment of the present disclosure.
  • FIG 5 is an assembly view of the centering bracket and the coil at another angle according to an embodiment of the present disclosure.
  • 10 centering support piece; 11: first cantilever; 12: second cantilever; 13: lead-out edge; 14: free edge; 15: center portion; 16: edge portion; 17: lead; 18a: first plastic substrate 18b: second plastic substrate layer; 19: thermoplastic elastomer layer; 20: reinforcement layer; 21: diaphragm; 22: voice coil; 23: hollow-out area; 25: shell; 26: permanent magnet; 27: Permeable yoke; 28: pad; 29: damping rubber layer.
  • any specific value should be construed as exemplary only and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.
  • a sound generating device As shown in Figure 1, the device includes a vibration system and a magnetic circuit system that cooperates with the vibration system.
  • the sound generating device may be, but is not limited to, a single speaker, an earphone, and the like.
  • the magnetic circuit system includes a permanent magnet 26 and a permeable yoke 27.
  • the permanent magnet 26 is fixed on the magnetic yoke 27, for example, by glue.
  • the permanent magnet 26 includes a center magnet and a side magnet provided around the center magnet. A magnetic gap is formed between the center magnet and the side magnet. Magnetic guide plates are respectively provided on the central magnet and the side magnets.
  • the magnetic circuit system is not limited to the above embodiment, and other structures commonly used in the field of cost may be provided.
  • the permanent magnet 26 is a ring magnet; the magnetic circuit system is an internal magnetic circuit structure or an external magnetic circuit structure.
  • the vibration system includes a voice coil 22, a centering support 10, a diaphragm 21, and a reinforcing layer 20.
  • the centering piece 10 is made of an insulating material.
  • the centering leg 10 includes a central portion 15 at the center and an edge portion 16 at the outer periphery. A support portion is provided between the central portion 15 and the edge portion 16.
  • the supporting portion can provide elastic supporting force to prevent polarization of the vibration system.
  • One end of the voice coil 22 in the axial direction is fixed to the center portion 15.
  • the centering support piece 10 is fixed to an end of the voice coil 22 that is close to the diaphragm 21 or an end that is far from the diaphragm 21.
  • the voice coil 22 is inserted into the magnetic gap.
  • the central portion 15 is fixedly connected to the middle portion of the diaphragm 21.
  • a reinforcing layer 20 is further provided in the middle of the diaphragm 21.
  • the edge portion 16 is fixed to the casing 25 of the sound generating device or the side wall of the magnetic yoke 27 of the magnetic circuit system. For example, by glue.
  • the adhesive used for bonding may be selected from materials commonly used in the art.
  • the body portion of the voice coil includes two opposite leading edges 13 and two opposing free edges 14.
  • the leads 17 are led out from the two lead-out edges 13 respectively.
  • the centering support piece 10 includes two first sides corresponding to the two lead-out sides 13 and two second sides corresponding to the two free sides 14.
  • the support portion includes a first cantilever 11 on two first sides and a second cantilever 12 on two second sides.
  • the lead wires 17 are extended outward along the extending direction of the first cantilever 11 and are fixedly connected to the first cantilever 11.
  • the first cantilever 11 has a buffer layer.
  • the first cantilever 11 and the second cantilever 12 may be provided in a linear shape, an arc shape, a wavy line shape, or the like.
  • the extending direction refers to the general direction of the first cantilever 11.
  • the first cantilever 11 may be parallel to the corresponding sides of the central portion 15 and the edge portion 16, or may be at a set angle with the two corresponding sides.
  • the buffer layer is a damping rubber layer 29.
  • the damping rubber layer 29 has a good damping effect.
  • the damping glue layer 29 is at least one of an acrylic glue and a silica gel. The above materials all have good damping effects and can effectively reduce the noise of the sound generating device.
  • the buffer layer may be a thermoplastic elastomer layer 19.
  • the thermoplastic elastomer layer 19 has good elasticity.
  • the material of the thermoplastic elastic layer 19 includes a polyester-based thermoplastic elastomer, a polyurethane-based thermoplastic elastomer, a polyamide-based thermoplastic elastomer, a polystyrene-based thermoplastic elastomer, a polyolefin-based thermoplastic elastomer, a dynamic vulcanized rubber, and a thermoplastic. At least one of a blend type thermoplastic elastomer. The above materials can improve the elasticity and stiffness of the first cantilever.
  • the buffer layer may be a composite structure of the damping rubber layer 29 and the thermoplastic elastomer layer 19.
  • the damping rubber layer 29 and the thermoplastic elastomer layer 19 are as described above.
  • the composite structure has both good damping effect, elasticity and rigidity, so that the damping effect, elasticity and rigidity of the first cantilever can be more effectively improved, the reliability of the centering piece 10 is reduced, and the noise of the sound generating device is reduced.
  • the buffer layer has good elasticity and damping effects, and can play a buffering role, thereby effectively buffering the interaction force between the lead 17 and the first cantilever 11 during vibration, and reducing the stress concentrated. This allows the stress of the lead wire 17 to be uniformly dispersed as the first cantilever 11 vibrates, reduces the risk of disconnection of the lead wire 17, and improves the reliability margin of the sound generating device.
  • the buffer layer is a surface layer structure located on the first cantilever 11. Under normal circumstances, the surface structure is prone to fatigue damage.
  • the buffer layer is used as the surface layer structure of the first cantilever 11. Compared with the buffer layer provided in the middle layer of the first cantilever 11, this arrangement makes the first cantilever 11 more excellent in damping performance and elasticity.
  • the first cantilever 11 and the second cantilever 12 include a first plastic substrate layer 18 a.
  • the first cantilever 11 further includes a buffer layer covering the first plastic substrate layer 18 a and a second plastic substrate layer 18 b covering the buffer layer.
  • the material of at least one of the first plastic substrate layer 18a and the second plastic substrate layer 18b is at least one of PI, PU, PEI, PEEK, PPS, and PEN.
  • the buffer layer is a thermoplastic elastomer layer 19. The above materials all have good high temperature resistance performance, so that the centering support 10 maintains a good elastic supporting force under long-term and large amplitude working conditions.
  • the structure shown in FIG. 3 includes a first plastic substrate layer 18 a and a second plastic substrate layer 18 b as surface layers, and a buffer layer therebetween.
  • the buffer layer includes two damping rubber layers 29 and a thermoplastic elastomer layer 19 located between the two damping rubber layers 29.
  • the first cantilever also has good damping performance, elasticity and stiffness.
  • each first side includes a first cantilever 11.
  • the two first cantilevers 11 are symmetrically arranged with respect to the geometric center of the centering branch 10.
  • the centrally symmetrical manner makes the pulling effect of the lead 17 on the centering support 10 more balanced.
  • the amplitude of the vibration system is more balanced, which can more effectively suppress polarization.
  • each first side includes a first cantilever 11.
  • Each second side includes two second cantilevers 12.
  • the two second cantilevers 12 on at least one second side are symmetrical to each other with respect to a mid-perpendicular line of the second side.
  • the plurality of second cantilevers 12 can provide multi-point support. And because the two second cantilevers 12 are symmetrical to each other, it can effectively suppress the torsion and offset of the centering support 10 during vibration, and ensure that the centering support 10 vibrates back and forth in the vibration direction, thereby effectively suppressing the polarization.
  • the number of the second cantilevers 12 may also be 4, 6, 8, and the like, and are symmetrical to each other with respect to the middle perpendicular of the second side, which is not limited in this disclosure.
  • the centering leg 10 is integrally formed.
  • the central portion 15, the edge portion 16, the first cantilever 11 and the second cantilever 12 are formed from a same composite material film layer by a set structure such as shearing, punching, or the like.
  • a blanking process is performed between the central portion 15, the edge portion 16, the first cantilever 11 and the second cantilever 12 to form a hollowed-out area 23.
  • a buffer layer is not provided at a portion where the second cantilever 12 is formed.
  • the materials of the first cantilever 11 and the second cantilever 12, the central portion 15, and the edge portion 16 of the centering support 10 are different.
  • the first cantilever 11, the second cantilever 12, the center portion 15 and the edge portion 16 are separately made, and then the four parts are bonded together to form the centering branch piece 10.
  • centering support piece 10 is not limited to the above embodiments, and those skilled in the art may select according to actual needs.
  • the sound generating device further includes a ring-shaped casing 25.
  • the casing 25 has a rectangular ring shape.
  • the housing 25 is fixed to a permanent magnet 26 of the magnetic circuit system.
  • the pads 28 of the sound generating device are injection molded at the corners of the casing 25.
  • the two pads 28 are injection-molded at two opposite corners of the housing 25 by insert injection molding.
  • the last section of the lead 17 is soldered on the pad 28 after leaving the first cantilever 11.
  • the lead 17 is connected to an external device through a pad 28.
  • the pad 28 includes an inner connection portion and an outer connection portion.
  • the lead 17 is soldered to the inner connection portion.
  • the external connection portion is in contact connection with an external device. Compared with directly soldering the lead wire 17 to an external device, this method makes it easier to conduct the speaker unit and the external device.
  • the pads 28 are provided at the corners for easy operation, which makes connection with external devices easy.
  • an electronic device may be, but is not limited to, a sound generating module, a mobile phone, a tablet computer, a wearable device, a walkie-talkie, a game console, a radio, a television, a smart speaker, and the like.
  • the electronic device includes a casing and a sound emitting device according to an embodiment of the present disclosure.
  • the sound generating device is provided in the casing.
  • the electronic device has the characteristics of good sound effect and good reliability.

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

Abstract

一种发声装置以及电子设备，该装置包括振动系统和与振动系统相配合的磁路系统，定心支片（10）包括位于中央的中心部（15）和位于外周的边缘部（16），中心部（15）和边缘部（16）之间设有支撑部，音圈（22）包括本体部和由本体部引出的引线（17），本体部包括相对的两个引出边（13）和相对的两个自由边（14），定心支片（10）包括与两个引出边（13）对应的两个第一边，与两个自由边（14）对应的两个第二边，支撑部包括分别位于两个第一边上的第一悬臂（11）以及分别位于两个第二边上的第二悬臂（12），引线沿第一悬臂（11）的延伸方向向外引出并与第一悬臂（11）固定连接，第一悬臂（11）相较于第二悬臂（12）增设有缓冲层。

Description

发声装置以及电子设备 技术领域
本公开涉及电声转换技术领域，更具体地，涉及一种发声装置以及应用了该发声装置的电子设备。
背景技术
随着手机SMART-PA(智能功放系统)发展，要求扬声器能在苛刻的条件下(例如大振幅)使用并保证性能可靠。这就要求扬声器具有更高的声学性能并且能够满足更高的可靠性。音圈的引线沿定心支片的悬臂引出并固定的方案使得定心支片兼具定心作用以及降低整机断线风险的作用。
现有的扬声器中，定心支片多条悬臂都采用相同的材料。例如，单层聚酰亚胺(PI)或多层聚酰亚胺(PI)复合的结构。然而，由于引线自身的重量以及拉扯力，使得固定引线的悬臂承受更大的负荷以及撞击。这会影响定心支片的定心作用，造成振动系统的偏振。
因此，需要提供一种新的技术方案以解决上述技术问题。
发明内容
本公开的一个目的是提供一种发声装置的新技术方案。
根据本公开的一个方面，提供了一种发声装置。该装置包括振动系统和与所述振动系统相配合的磁路系统，其中，所述振动系统包括定心支片和音圈，所述定心支片包括位于中央的中心部和位于外周的边缘部，所述中心部和所述边缘部之间设有支撑部，所述音圈沿轴向的一端被固定在所述中心部，所述音圈包括本体部和由所述本体部引出的引线，所述本体部包括相对的两个引出边和相对的两个自由边，所述引线分别由两个引出边上引出，所述定心支片包括与两个引出边对应的两个第一边，与两个自由边对应的两个第二边，所述支撑部包括分别位于两个第一边上的第一悬臂 以及分别位于两个第二边上的第二悬臂，所述引线沿所述第一悬臂的延伸方向向外引出并与所述第一悬臂固定连接，所述第一悬臂相较于第二悬臂增设有缓冲层。
可选地，所述缓冲层为阻尼胶层；或者，所述缓冲层为热塑性弹性体层；或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构。
可选地，所述缓冲层为阻尼胶层；或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构；所述阻尼胶层为丙烯酸胶和硅胶中的至少一种。
可选地，所述缓冲层为热塑性弹性体层或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构；所述热塑性弹性层的材质包括聚酯类热塑性弹性体、聚氨酯类热塑性弹性体、聚酰胺类热塑性弹性体、聚苯乙烯类热塑性弹性体、聚烯烃类热塑性弹性体、动态硫化橡胶和热塑性塑料共混物型热塑性弹性体中的至少一种。
可选地，所述缓冲层为位于所述第一悬臂的表层结构。
可选地，所述第一悬臂和第二悬臂包括第一塑料基材层，所述第一悬臂还包括覆盖于所述第一塑料基材层上的缓冲层以及覆盖于所述缓冲层上的第二塑料基材层。
可选地，每个所述第一边包括一个第一悬臂，两个所述第一悬臂相对于所述定心支片的几何中心呈中心对称设置。
可选地，每个所述第一边包括一个所述第一悬臂，每个所述第二边包括两个所述第二悬臂，至少一个所述第二边上的两个所述第二悬臂相对于该第二边的中垂线相互对称。
可选地，所述第一塑料基材层和所述第二塑料基材层中的至少一种的材质为PI、PU、PEI、PEEK、PPS和PEN中的至少一种。
根据本公开的另一个方面，提供了一种电子设备。该设备包括设备壳体和上述发声装置，所述发声装置被设置在所述设备壳体中。
根据本公开的一个实施例，该发声装置具有可靠性能良好的特点。
通过以下参照附图对本公开的示例性实施例的详细描述，本公开的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是根据本公开的一个实施例的发声装置的分解图。
图2-3是根据本公开的实施例的第一悬臂的剖视图。
图4是根据本公开的一个实施例的定心支片与线圈的装配图。
图5是根据本公开的一个实施例的定心支片与线圈的另一个角度的装配图。
附图标记说明：
10：定心支片；11：第一悬臂；12：第二悬臂；13：引出边；14：自由边；15：中心部；16：边缘部；17：引线；18a：第一塑料基材层；18b：第二塑料基材层；19：热塑性弹性体层；20：补强层；21：振膜；22：音圈；23：镂空区；25：外壳；26：永磁体；27：导磁轭；28：焊盘；29：阻尼胶层。
具体实施方式
现在将参照附图来详细描述本公开的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本公开的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开的一个实施例，提供了一种发声装置。如图1所示，该装置包括振动系统和与振动系统配合的磁路系统。该发声装置可以是但不局限于扬声器单体、耳机等。
磁路系统用于形成磁场。磁路系统包括永磁体26和导磁轭27。永磁体26固定在导磁轭27上，例如，通过胶固定。在该例子中，永磁体26包括中心磁铁和围绕中心磁铁设置的边磁铁。在中心磁铁和边磁铁之间形成磁间隙。在中心磁铁和边磁铁上分别设置有导磁板。当然，磁路系统不限于上述实施例，还可以设置成本领域所常用的其他结构。例如，永磁体26为环形磁铁；磁路系统为内磁路结构或者外磁路结构等。
振动系统包括音圈22、定心支片10、振膜21和补强层20。定心支片10由绝缘材料制成。定心支片10包括位于中央的中心部15和位于外周的边缘部16。中心部15和边缘部16之间设有支撑部。
支撑部能够提供弹性支撑力，从而防止振动系统发生偏振。音圈22沿轴向的一端被固定在中心部15。例如，定心支片10被固定在音圈22的靠近振膜21的一端或者远离振膜21的一端。音圈22插入磁间隙中。中心部15与振膜21的中部固定连接。在振膜21的中部还设置有补强层20。边缘部16被固定在发声装置的外壳25或者磁路系统的导磁轭27的侧壁上。例如，通过胶固定。用于粘结的胶可选用本领域常用的材料。
在该例子中，如图1所示，音圈的本体部包括相对的两个引出边13和相对的两个自由边14。引线17分别由两个引出边13上引出。定心支片10包括与两个引出边13对应的两个第一边，与两个自由边14对应的两个第二边。
如图4所示，支撑部包括分别位于两个第一边上的第一悬臂11以及分别位于两个第二边上的第二悬臂12。引线17沿第一悬臂11的延伸方向向外引出并与第一悬臂11固定连接。第一悬臂11相较于第二悬臂12增设有缓冲层。
第一悬臂11和第二悬臂12可以设置成直线型、弧线形、波浪线形等。延伸方向是指第一悬臂11的大体的走向。第一悬臂11可以平行于中心部15和边缘部16的对应边，也可以与两个对应边呈设定的角度。
可选地，缓冲层为阻尼胶层29。阻尼胶层29具有良好的阻尼效果。例如，阻尼胶层29为丙烯酸胶和硅胶中的至少一种。上述材料均具有良好的阻尼效果，能够有效地降低发声装置的杂音。
也可以是，缓冲层为热塑性弹性体层19。热塑性弹性体层19具有良好的弹性。例如，热塑性弹性层19的材质包括聚酯类热塑性弹性体、聚氨酯类热塑性弹性体、聚酰胺类热塑性弹性体、聚苯乙烯类热塑性弹性体、聚烯烃类热塑性弹性体、动态硫化橡胶和热塑性塑料共混物型热塑性弹性体中的至少一种。上述材料均能提高第一悬臂的弹性以及刚度。
还可以是，缓冲层为阻尼胶层29与热塑性弹性体层19的复合结构。阻尼胶层29和热塑性弹性体层19如前所述。该复合结构兼具良好的阻尼效果、弹性和刚度，从而能够更有效地提高第一悬臂的阻尼效果、弹性和刚度，提高定心支片10的可靠性，降低发声装置的杂音。
在本公开的实施例中，缓冲层具有良好的弹性和阻尼效果，能够起到缓冲的作用，从而有效地缓冲在振动时引线17与第一悬臂11之间的相互作用力，并且降低了应力集中。这使得引线17随第一悬臂11振动时的应力均匀地分散，降低了引线17断线风险，提升了发声装置的可靠性余量。
在一个例子中，缓冲层为位于第一悬臂11的表层结构。通常情况下，表层结构，容易发生疲劳损伤。在该例子中将缓冲层作为第一悬臂11的表层结构，相对于将缓冲层设置在第一悬臂11的中间层，这种设置方式使得第一悬臂11的阻尼性能和弹性更加优良。
在一个例子中，如图2所示，第一悬臂11和第二悬臂12包括第一塑料基材层18a。第一悬臂11还包括覆盖于第一塑料基材层18a上的缓冲层以及覆盖于缓冲层上的第二塑料基材层18b。
可选地，第一塑料基材层18a和第二塑料基材层18b中的至少一种的材质为PI、PU、PEI、PEEK、PPS和PEN中的至少一种。缓冲层为热塑性弹性体层19。上述材料均具有良好的耐高温性能，从而使得在长时间、大振幅工作条件下，定心支片10保持良好的弹性支撑力。
图3所示的结构包括作为表层的第一塑料基材层18a和第二塑料基材层18b以及位于二者之间的缓冲层。缓冲层包括两层阻尼胶层29和位于两 层阻尼胶层29之间的热塑性弹性体层19。该第一悬臂同样具备良好的阻尼性能、弹性以及刚度。
在一个例子中，如图4-5所示，每个第一边包括一个第一悬臂11。两个第一悬臂11相对于定心支片10的几何中心呈中心对称设置。中心对称的方式使得引线17对于定心支片10的拉扯作用更均衡，相对于将出线和入线从同一部位引出或者从相同侧引出，这样，振动系统的振幅更均衡，从而更有效地抑制偏振。
在一个例子中，每个第一边包括一个第一悬臂11。每个第二边包括两个第二悬臂12。至少一个第二边上的两个第二悬臂12相对于该第二边的中垂线相互对称。多个第二悬臂12能够提供多点支撑。并且由于两个第二悬臂12相互对称故能够有效地抑制定心支片10在振动时的扭转、偏移等，保证定心支片10沿振动方向往复振动，从而有效地抑制了振动系统的偏振。
当然，第二悬臂12的数量还可以是4条、6条、8条等，并且相对于第二边的中垂线相互对称，本公开对此不做限定。
在一个例子中，定心支片10是一体成型的。例如，中心部15、边缘部16、第一悬臂11和第二悬臂12由同一片复合材料膜层经剪切、冲裁等方式形成设定的结构。在中心部15、边缘部16、第一悬臂11和第二悬臂12之间做去料处理，以形成镂空区23。需要注意的是，在形成第二悬臂12的部位，未设置缓冲层。
还可以是，根据实际需要先将塑料基材层和缓冲层制备成设定的形状，然后再将塑料基材层和缓冲层复合在一起。
在其他示例中，定心支片10的第一悬臂11与第二悬臂12、中心部15、边缘部16的材质不同。在制作时，先分别制作第一悬臂11、第二悬臂12、中心部15和边缘部16，然后将四个部分粘结在一起，以形成定心支片10。
当然，定心支片10的制作不限于上述实施例，本领域技术人员可以根据实际需要进行选择。
在一个例子中，如图1所示，发声装置还包括环状的外壳25。例如， 外壳25呈矩形环状。外壳25固定在磁路系统的永磁体26上。发声装置的焊盘28注塑在外壳25的角部。例如，通过嵌件注塑的方式将两个焊盘28分别注塑在外壳25的相对的两个角部。
如图5所示，引线17的末段脱离第一悬臂11后被焊接在焊盘28上。引线17通过焊盘28与外部设备导通。焊盘28包括内连接部和外连接部。引线17被焊接在内连接部。外连接部与外部设备接触式连接。相比于直接将引线17焊接到外部设备上，这种方式使得扬声器单体与外部设备的导通更容易。
此外，焊盘28设置在角部，便于操作，这使得与外部设备的连接变得容易。
根据本公开的另一个实施例，提供了一种电子设备。该电子设备可以是但不局限于发声模组、手机、平板电脑、可穿戴设备、对讲机、游戏机、收音机、电视机、智能音箱等。该电子设备包括壳体以及本公开实施例的发声装置。发声装置被设置在壳体中。
该电子设备具有发声效果好，可靠性良好的特点。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种发声装置,包括振动系统和与所述振动系统相配合的磁路系统，其中，所述振动系统包括定心支片和音圈，所述定心支片包括位于中央的中心部和位于外周的边缘部，所述中心部和所述边缘部之间设有支撑部，所述音圈沿轴向的一端被固定在所述中心部，
    所述音圈包括本体部和由所述本体部引出的引线，所述本体部包括相对的两个引出边和相对的两个自由边，所述引线分别由两个引出边上引出，所述定心支片包括与两个引出边对应的两个第一边，与两个自由边对应的两个第二边，
    其特征在于，所述支撑部包括分别位于两个第一边上的第一悬臂以及分别位于两个第二边上的第二悬臂，所述引线沿所述第一悬臂的延伸方向向外引出并与所述第一悬臂固定连接，所述第一悬臂相较于第二悬臂增设有缓冲层。
  2. 根据权利要求1所述的发声装置，其中，所述缓冲层为阻尼胶层；
    或者，所述缓冲层为热塑性弹性体层；
    或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构。
  3. 根据权利要求2所述的发声装置，其中，所述缓冲层为阻尼胶层；
    或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构；
    所述阻尼胶层为丙烯酸胶和硅胶中的至少一种。
  4. 根据权利要求1所述的发声装置，其中，所述缓冲层为热塑性弹性体层；
    或者，所述缓冲层为阻尼胶层与热塑性弹性体层的复合结构；
    所述热塑性弹性层的材质包括聚酯类热塑性弹性体、聚氨酯类热塑性弹性体、聚酰胺类热塑性弹性体、聚苯乙烯类热塑性弹性体、聚烯烃类热塑性弹性体、动态硫化橡胶和热塑性塑料共混物型热塑性弹性体中的至少 一种。
  5. 根据权利要求1所述的发声装置，其中，所述缓冲层为位于所述第一悬臂的表层结构。
  6. 根据权利要求1所述的发声装置，其中，所述第一悬臂和第二悬臂包括第一塑料基材层，所述第一悬臂还包括覆盖于所述第一塑料基材层上的缓冲层以及覆盖于所述缓冲层上的第二塑料基材层。
  7. 根据权利要求1所述的发声装置，其中，每个所述第一边包括一个第一悬臂，两个所述第一悬臂相对于所述定心支片的几何中心呈中心对称设置。
  8. 根据权利要求1所述的发声装置，其中，每个所述第一边包括一个所述第一悬臂，每个所述第二边包括两个所述第二悬臂，至少一个所述第二边上的两个所述第二悬臂相对于该第二边的中垂线相互对称。
  9. 根据权利要求6所述的发声装置，其中，所述第一塑料基材层和所述第二塑料基材层中的至少一种的材质为PI、PU、PEI、PEEK、PPS和PEN中的至少一种。
  10. 一种电子设备，包括设备壳体和如权利要求1-9中的任意一项所述的发声装置，所述发声装置被设置在所述设备壳体中。
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