WO2018171066A1 - 扬声器模组 - Google Patents

扬声器模组 Download PDF

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Publication number
WO2018171066A1
WO2018171066A1 PCT/CN2017/090340 CN2017090340W WO2018171066A1 WO 2018171066 A1 WO2018171066 A1 WO 2018171066A1 CN 2017090340 W CN2017090340 W CN 2017090340W WO 2018171066 A1 WO2018171066 A1 WO 2018171066A1
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sound
hole
speaker module
damping
cavity
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PCT/CN2017/090340
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English (en)
French (fr)
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张军
苏涛
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歌尔股份有限公司
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Publication of WO2018171066A1 publication Critical patent/WO2018171066A1/zh

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  • 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 existing speaker module comprises a casing and a speaker unit housed in the casing.
  • the speaker unit divides the entire module cavity into two chambers of a front sound chamber and a rear sound chamber, and the front sound chamber communicates with the outside of the speaker module.
  • the sound-absorbing material is usually filled in the rear sound cavity.
  • the sound-absorbing material can effectively reduce the F0 of the speaker module, and the intermediate frequency response curve is more Smoothing is an important part of the speaker module.
  • the sound absorbing material with the best sound absorption effect is sound absorbing particles, which is used in the design of the speaker module structure, and a special area is reserved for filling the sound absorbing particles.
  • One side of the area is a mesh cloth for air circulation and sealing sound absorption. The particles prevent the sound absorbing particles from scattering to other areas of the rear sound chamber, and the rest are the speaker module housing.
  • the sound absorbing particles are filled in a filling mode, and a hole is designed in the outer casing of the sound absorbing particle filling area of the speaker module for filling the sound absorbing particles therein, and then using the airtight PET (polyethylene terephthalate) after filling.
  • the glycol ester) sheet or steel sheet is sealed.
  • a commonly used speaker module needs to design a small hole as a leak hole, and the leak hole is affixed with a gas permeable damping, and the function of the leak hole is to balance the air pressure inside and outside the speaker module. Improve the vibration stability of the vibration system and optimize the acoustic performance.
  • Such a speaker module with a two-hole structure has the following drawbacks in production and use:
  • the two hole structures need to be attached to the attachment, and the assembly process requires more work stations and operators, and the cost is high;
  • the two hole structures need to be additionally attached to the accessory seal.
  • the sealing sheet and the damping and the outer casing are only bonded by double-sided adhesive, the bonding force is small, and it is easy to fall off after the reliability test such as dropping, high temperature and high humidity.
  • the technical problem to be solved by the present invention is to provide a speaker module, which has low processing difficulty, requires less steps, low cost, good sealing performance, high reliability, and long service life.
  • the technical solution of the present invention is:
  • a speaker module includes a casing and a speaker unit housed in the casing, the speaker unit separating the entire module cavity into two cavities of a front acoustic cavity and a rear acoustic cavity, and the outer casing is provided with The through hole of the sound absorbing particle is filled, and the through hole doubles as a leak hole for air pressure equalization between the rear sound cavity and the outside.
  • the rear acoustic cavity is separated by a sound-permeable partition with a filling cavity for filling the sound absorbing particles, and the filling cavity has a position corresponding to the through hole.
  • the casing is fixed with a damping for covering the through hole
  • the damping includes a superimposed damping film having a micro hole and a sound transmitting sheet, and the rear acoustic cavity passes through a central hole of the sound transmitting sheet The damping film and the through hole communicate with the outside.
  • the outer casing located around the through hole is provided with a concave positioning groove, and the damping is fixed in the positioning groove.
  • the side portion of the damping and the side wall of the positioning groove are filled with a sealant.
  • the bottom of the positioning groove is provided with a heat-melting column, and the damping is provided with a hot-melt hole through which the heat-melting column passes.
  • the outer casing comprises an upper shell and a lower shell joined together, and an inner side of the upper shell is provided with a fixed frame extending to the inner cavity of the module, and the sound-permeable partition is horizontally fixed on the fixed frame and
  • the rear acoustic cavity is divided into two upper and lower cavities, and the cavity on the upper side is the filling cavity; the through hole is disposed on the upper casing.
  • the upper casing includes a first upper casing and a second upper casing that are integrated, the fixed frame is disposed on the first upper casing, and the second upper casing covers the filling cavity
  • the first upper shell Cooperating with the sound-permeable spacer to form the filling cavity; the through hole is disposed on the second upper casing.
  • the outer peripheral shape and size of the sound-permeable sheet are consistent with the outer peripheral shape and size of the damping film
  • the through hole has a diameter of 1 mm to 5 mm
  • the sound-permeable sheet has a thickness of 0.03 mm to 1 mm.
  • the central hole of the sound-permeable sheet has a hole diameter of 1 mm to 5 mm.
  • the damping is adhered to the outer casing by a glue layer, the damping is fixed on the outer casing by a first adhesive layer, and the second adhesive layer is passed between the sound-permeable sheet and the damping film. Bonding into one.
  • the first adhesive layer and the second adhesive layer have a thickness of 0.01 mm to 0.3 mm and a pore diameter of 1 mm to 6 mm.
  • the material of the sound-permeable sheet is a metal sheet or a rigid plastic sheet
  • the hard plastic sheet is one of a PET sheet, a PC sheet, a PP sheet or an ABS sheet.
  • the material of the damping film is one of a mesh cloth, a sound-transmitting film or a non-woven fabric
  • the material of the sound-permeable membrane is one of EFEP, EPTFE or TPU
  • the material of the sound-permeable membrane is One of EFEP, EPTFE or TPU.
  • the mesh has a thickness of 0.03 mm to 0.15 mm and an opening ratio of 1% to 20%.
  • the outer casing of the speaker module of the present invention is provided with a through hole for filling the sound absorbing particles, the through hole also serves as a leakage hole.
  • the utility model combines the sound absorbing particle filling hole and the leakage hole in the prior art into one, and only needs to stick a damping during assembly, and no longer needs to paste the sealing piece, thereby having the following advantages compared with the prior art:
  • the hole structure on the outer casing is reduced, the probability of leakage of the speaker module due to poor sealing at the hole structure is reduced, the sealing performance and reliability of the speaker module are improved, and the service life of the speaker module is prolonged.
  • the damping is located in the positioning groove, and the positioning groove can play a role of positioning when the bonding is damped, preventing the damping sticking, and improving the yield and consistency of the speaker module. It also effectively reduces the difficulty of bonding and improves the bonding efficiency.
  • the sealant Since the sealant is filled between the side of the damping and the side wall of the positioning groove, the sealant enhances the adhesion between the damping and the outer casing, avoids the badness of the damping after the reliability test, and also strengthens the damping and The sealing effect between the outer casings avoids air leakage due to poor bonding, further improving the reliability and service life of the speaker module.
  • the damper Since the bottom of the positioning groove is provided with a heat-melting column, the damper is provided with a hot-melt hole through which the heat-melting column passes.
  • the heat-melt column can enhance the bonding strength between the damping and the outer casing, avoids the badness of the damping after the reliability test, and further improves the reliability and service life of the speaker module.
  • the speaker module of the present invention solves the technical problems of high difficulty in processing and high cost of the speaker module in the prior art.
  • the speaker module of the utility model has low processing difficulty, low production cost, good sealing performance and reliability. High sex and long service life.
  • FIG. 1 is a schematic exploded view of a first embodiment of a speaker module of the present invention
  • Figure 2 is a combination view of Figure 1;
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is an enlarged view of a portion B of Figure 3;
  • Figure 5 is a partial cross-sectional view showing a second embodiment of the speaker module of the present invention.
  • Figure 6 is a partial cross-sectional view showing a third embodiment of the speaker module of the present invention.
  • 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.
  • the orientation referred to in this specification refers to the orientation in which the speaker unit is provided with the upper case, and the azimuth refers to the orientation of the speaker unit provided with the lower case.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a speaker module includes a casing which is composed of an upper casing 10 and a lower casing 20 which are joined together, and a space enclosed by the upper casing 10 and the lower casing 20 is accommodated.
  • the speaker unit 30 divides the entire module cavity into two cavities of the front acoustic cavity 60 and the rear acoustic cavity 62.
  • the speaker unit 30 and the upper casing 10 together define a front acoustic cavity 60, a speaker unit 30, an upper casing 10 and a lower casing. 20 together form a rear acoustic cavity 62.
  • the upper casing 10 is provided with a through hole 140 for filling sound absorbing particles (not shown), and the through hole 140 doubles between the rear sound chamber 62 and the outside. Leak hole for air pressure equalization.
  • a filling cavity 620 for filling the sound absorbing particles is partitioned by the sound permeable spacer 70 in the rear acoustic cavity 62.
  • the sound absorbing particles are filled into the filling cavity 620 from the through hole 140, and the position and the through hole of the filling cavity 620 are filled.
  • the sound absorbing particles are used to reduce the F0 of the speaker module to improve the low frequency performance, and the sound permeable spacer 70 prevents the sound absorbing particles from entering the other regions of the rear sound chamber 62, which is beneficial for protecting the speaker unit 30.
  • the spacer 70 is preferably a mesh.
  • the upper casing 10 is formed by combining the first upper casing 12 and the second upper casing 14 , and the speaker unit 30 is fixed to the first upper casing 12 and the lower casing. Between 20, the speaker unit 30 and the first upper casing 12 together define a front acoustic cavity 60.
  • the filling cavity 620 is located at one side of the speaker unit 30.
  • the inner side of the first upper casing 12 is provided with a fixed frame 120 extending into the rear acoustic cavity 62.
  • the edge of the sound-permeable spacer 70 is fixed on the fixed frame 120, and the sound-permeable spacer
  • the horizontal setting of the 70 is divided into two upper and lower cavities, and the cavity on the upper side is a filling cavity 620.
  • the first upper casing 12 corresponds to an area above the filling cavity 620 as an open structure, and the second upper casing 14 covers the open structure.
  • the filling cavity 620 is composed of a first upper casing 12, a second upper casing 14, and a sound-permeable partition 70. Coexisting, the through hole 140 is located on the second upper casing 14.
  • the second upper casing 14 located at the periphery of the through hole 140 is provided with a concave positioning groove 142 , and the positioning groove 142 forms a boss structure on the inner side of the second upper casing 14 . .
  • the through hole 140 is located at the center of the positioning groove 142, and the damping 50 is adhesively fixed in the positioning groove 142.
  • the through hole 140 has a hole diameter of 1 mm to 5 mm.
  • the sidewall and the positioning groove of the damping 50 are preferably used.
  • the side walls of the 142 are filled with a sealant 80, that is, the periphery of the damper 50 is coated with a sealant 80 to enhance the adhesion between the damper 50 and the second upper case 14.
  • the damping 50 includes a microporous damping film 52 and a sound transmitting sheet 54 which are superposed together, and the damping film 52 passes through
  • the adhesive layer 56 is adhesively bonded to the second upper case 14.
  • the sound-permeable sheet 54 has an annular structure, and is bonded to the edge of the damping film 52 away from the second upper case 14 by the adhesive layer 56.
  • the central hole corresponds to the through hole 140, and the rear acoustic cavity 62 communicates with the outside through the central hole of the sound-transmitting sheet 54, the damping film 52 and the through hole 140, and the sound-transmitting sheet 54 and the damping film 52 are also bonded by the adhesive layer 56.
  • the adhesive layer is preferably a double-sided adhesive, which is convenient to use and is easy to handle.
  • the thickness of the adhesive layer is 0.01 mm to 0.3 mm, and the diameter of the adhesive is 1 mm to 6 mm.
  • the outer peripheral shape and size of the sound-transmitting sheet 54 coincide with the outer peripheral shape and size of the damping film 52.
  • the damping film 52 has a circular structure and a sound-permeable sheet.
  • 54 is a circular ring structure, but the practical application is not limited to a circular structure, and a square, an elliptical shape or the like can cover the through hole 140.
  • the material of the damping film 52 is preferably one of a mesh cloth, a sound-transmitting film or a non-woven fabric.
  • the thickness of the mesh cloth is 0.03 mm to 0.15 mm, and the opening ratio is 1% to 20%.
  • the material of the sound-permeable membrane is preferably one of EFEP (fluororesin), EPTFE (expanded polytetrafluoroethylene) or TPU (thermoplastic polyurethane elastomer rubber), but is not limited to the above-mentioned ones, and the damping film 52 may be
  • the one-layer structure may also be a multilayer composite structure: a multilayer film composed of two or more of a plurality of materials mentioned above.
  • the material of the sound-transmitting sheet 54 is selected to have a certain rigidity.
  • the material of the sound-transmitting sheet 54 is a metal sheet or a rigid plastic sheet, wherein the rigid plastic sheet is preferably PET (polyethylene terephthalate).
  • PET polyethylene terephthalate
  • the rigidity of the material can be used for shaping, and the sound-transmitting sheet 54 can also be any composite of a layer or a plurality of sheets.
  • the thickness of the sound-transmitting sheet 54 is 0.03 mm to 1 mm, and the central hole The aperture is 1 mm to 5 mm, and in the present embodiment, it is preferable that the aperture of the sound-transmitting sheet 54 is smaller than the aperture of the through hole 140.
  • the speaker module further includes an FPCB (Flexible Printed Circuit Board).
  • FPCB 40 Flexible Printed Circuit Board 40
  • FPCB 40 is used for electrically connecting the speaker unit 30 and an external circuit
  • the FPCB 40 is located at one end of the module cavity and is provided with two electrical connections, which are respectively electrically connected to the two pads of the speaker unit 30, and the FPCB 40
  • the other end of the module is electrically connected to the external circuit through the module cavity.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment is basically the same as the first embodiment, and the difference is:
  • the annular sound-transmitting sheet 54 is bonded to the second upper case 14 by a glue layer, and the damping film 52 is bonded to the side of the sound-transmitting sheet 54 away from the second upper case 14 by a glue layer.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment is basically the same as the first embodiment or the second embodiment, and the difference is:
  • the bottom of the positioning groove 142 is provided with a plurality of heat-melting columns 144 in the circumferential direction.
  • the positions of the corresponding heat-melting columns 144 on the damping 50 are respectively provided with hot-melting holes 141 adapted to the heat-melting column 144.
  • the melting column 144 passes through the hot melt hole 141, and then the end of the heat-melting column 144 exposed to the damping 50 is thermally fused into a small cap structure by a hot-melt process, and the damping 50 is fixed on the second upper casing 14, which can be further improved.
  • the damping 50 is prevented from coming off the second upper casing 14.
  • the utility model combines the sound absorbing particle filling hole and the leakage hole in the prior art into one, and only needs to stick a damping during assembly, and no need to paste the sealing piece, thereby reducing the processing difficulty of the outer casing and reducing the speaker.
  • the module assembly process and the operator reduce the production cost; at the same time, the risk of air leakage and damping is reduced, and the reliability and service life of the speaker module are improved.
  • 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.
  • those skilled in the art can apply the technical solution of the present invention to the speaker module of other structures without any creative labor according to the above embodiments, so Whether the other structure of the speaker module is the same as that of the above embodiment, as long as the original filling hole and the leakage hole are combined into one to reduce the processing difficulty and the production cost, the products fall within the protection range of the utility model. .

Abstract

本实用新型公开了一种扬声器模组，涉及电声产品技术领域，包括外壳及收容在所述外壳内的扬声器单体，所述扬声器单体将整个模组内腔分隔为前声腔和后声腔两个腔体，所述外壳上设有用于灌装吸音颗粒的通孔，所述通孔兼做所述后声腔与外界之间的用于气压均衡的泄漏孔。本实用新型扬声器模组加工难度低，生产成本低，同时密封性能好，可靠性高，使用寿命长。

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。现有的扬声器模组包括外壳和收容在外壳内的扬声器单体，扬声器单体将整个模组内腔分隔为前声腔和后声腔两个腔体，前声腔连通扬声器模组的外界。为了降低扬声器模组的F0(谐振频率)，提高低频频响，扩展带宽，通常会在后声腔内填充吸音材料，吸音材料可以有效的降低扬声器模组的F0，并且使得中频频响曲线更为平滑，是扬声器模组内的一个重要部件。目前吸音效果最好的吸音材料为吸音颗粒，其使用方式为在设计扬声器模组结构时，留有专门的区域用来填充吸音颗粒，该区域一侧为网布，用于气流流通和密封吸音颗粒，防止吸音颗粒散落到后声腔的其它区域，其余为扬声器模组外壳。
吸音颗粒的填充方式为灌装式，在扬声器模组吸音颗粒填充区域的外壳上设计有一个孔，用于往里填充吸音颗粒，填充完后再使用不透气的PET(聚对苯二甲酸乙二醇酯)片或者钢片密封。目前，常用的扬声器模组除了一个用于填充吸音颗粒的孔结构以外，还需要再设计一个小孔作为泄漏孔，泄漏孔上贴透气的阻尼，泄漏孔的作用为平衡扬声器模组内外气压，改善振动系统振动稳定性、优化声学性能等作用。此种带有两个孔结构的扬声器模组在生产和使用上存在如下缺陷：
一、扬声器模组外壳上的孔结构越多，外壳加工难度越大，成本越高；
二、两个孔结构都需要粘贴附件，组装工序需要的工位和作业人员多，成本高；
三、两个孔结构都需要额外粘贴附件密封，孔结构越多，由于密封不良导致漏气的概率也越大；
四、密封片和阻尼与外壳仅使用双面胶粘接，粘接力较小，在跌落、高温高湿等可靠性试验后容易脱落。
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，此扬声器模组的外壳加工难度低，需要工序少，成本低，同时密封性好，可靠性高，使用寿命长。
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，所述扬声器单体将整个模组内腔分隔为前声腔和后声腔两个腔体，所述外壳上设有用于灌装吸音颗粒的通孔，所述通孔兼做所述后声腔与外界之间的用于气压均衡的泄漏孔。
其中，所述后声腔通过透声隔离件分隔有用于填充吸音颗粒的填充腔，所述填充腔的位置与所述通孔对应。
其中，所述外壳上固定有用于覆盖所述通孔的阻尼，所述阻尼包括叠加设置的具有微孔的阻尼膜和透声片，所述后声腔通过所述透声片的中心孔、所述阻尼膜和所述通孔与外界相通。
其中，位于所述通孔周边的所述外壳上设有凹陷的定位槽，所述阻尼固定在所述定位槽内。
其中，所述阻尼的侧部与所述定位槽的侧壁之间填充有密封胶。
其中，所述定位槽的底部设有热熔柱，所述阻尼上设有供所述热熔柱穿过的热熔孔。
其中，所述外壳包括结合在一起的上壳和下壳，所述上壳的内侧设有向模组内腔延伸的固定边框，所述透声隔离件水平固定在所述固定边框上并将所述后声腔分隔为上下两个腔体，位于上侧的所述腔体为所述填充腔；所述通孔设置在所述上壳上。
其中，所述上壳包括结合为一体的第一上壳和第二上壳，所述固定边框设置在所述第一上壳上，所述第二上壳覆盖在所述填充腔的上方与所述第一上壳 和所述透声隔离件共同围成所述填充腔；所述通孔设置在所述第二上壳上。
其中，所述透声片的外周形状和尺寸与所述阻尼膜的外周形状和尺寸相一致，所述通孔的孔径为1mm～5mm，所述透声片的厚度为0.03mm～1mm，所述透声片的中心孔的孔径为1mm～5mm。
其中，所述阻尼通过胶层粘接在所述外壳上，所述阻尼通过第一胶层粘接固定在所述外壳上，所述透声片与所述阻尼膜之间通过第二胶层粘接为一体。
其中，所述第一胶层和所述第二胶层厚度为0.01mm～0.3mm，孔径为1mm～6mm。
其中，所述透声片的材质为金属片或硬质塑料片，所述硬质塑料片为PET片、PC片、PP片或ABS片中的一种。
其中，所述阻尼膜的材质为网布、透声膜或无纺布中的一种，所述透声膜的材质为EFEP、EPTFE或TPU中的一种，所述透声膜的材质为EFEP、EPTFE或TPU中的一种。
其中，所述网布的厚度为0.03mm～0.15mm，开孔率为1％～20％。
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上设有用于灌装吸音颗粒的通孔，通孔兼做泄漏孔。本实用新型将现有技术中的吸音颗粒灌装孔与泄漏孔合二为一，在组装时仅需要粘贴一个阻尼，而不再需要粘贴密封片，从而与现有技术相比具有以下优点：
一、降低了外壳的加工难度，从而降低了生产成本；
二、将原有的密封片和阻尼两颗物料变为一颗物料，减少了物料以及组装工序工位和作业人员，进一步的降低了生产成本；
三、减少了外壳上的孔结构，降低了扬声器模组因孔结构处密封不良而造成漏气的概率，提高了扬声器模组的密封性和可靠性，延长了扬声器模组的使用寿命。
由于外壳上设有定位槽，阻尼位于定位槽内，定位槽在粘接阻尼时能够起到定位的作用，防止阻尼粘偏，能够提高扬声器模组的良品率和一致性，同时 还有效的降低了粘接难度，提高了粘接效率。
由于在阻尼的侧部与定位槽的侧壁之间填充有密封胶，密封胶增强了阻尼与外壳之间的粘接力，避免了可靠性试验后阻尼脱落的不良，同时还加强了阻尼与外壳之间的密封效果，避免了因粘接不良而漏气，进一步的提高了扬声器模组的可靠性和使用寿命。
由于定位槽的底部设有热熔柱，阻尼上设有供热熔柱穿过的热熔孔。热熔柱能够增强阻尼与外壳之间的结合强度，避免了可靠性试验后阻尼脱落的不良，更进一步的提高了扬声器模组的可靠性和使用寿命。
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加工难度大，成本高等技术问题，本实用新型扬声器模组加工难度低，生产成本低，同时密封性能好，可靠性高，使用寿命长。
附图说明
图1是本实用新型扬声器模组实施例一的分解结构示意图；
图2是图1的组合图；
图3是图2的A-A线剖视图；
图4是图3的B部放大图；
图5是本实用新型扬声器模组实施例二的局部剖视图；
图6是本实用新型扬声器模组实施例三的局部剖视图；
图中：10、上壳，12、第一上壳，120、固定边框，14、第二上壳，140、通孔，142、定位槽，141、热熔孔，144、热熔柱，20、下壳，30、扬声器单体，40、FPCB，50、阻尼，52、阻尼膜，54、透声片，56、双面胶，60、前声腔，62、后声腔，620、填充腔，70、透声隔离件，80、密封胶。
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。本说明书中涉及到的方位上指扬声器单体设有上壳的方位，方位下指扬声器单体设有下壳的方位。
实施例一：
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上壳10和下壳20构成，上壳10与下壳20围成的空间内收容有扬声器单体30。扬声器单体30将整个模组内腔分隔为前声腔60和后声腔62两个腔体，扬声器单体30与上壳10共同围成前声腔60，扬声器单体30、上壳10和下壳20共同围成后声腔62。
如图1、图2和图3共同所示，上壳10上设有一通孔140，用于灌装吸音颗粒(图中未示出)，通孔140兼做后声腔62与外界之间的用于气压均衡的泄漏孔。
后声腔62内通过透声隔离件70分隔有用于填充吸音颗粒的填充腔620，在组装扬声器模组时，吸音颗粒由通孔140处灌装到填充腔620，填充腔620的位置与通孔140对应，吸音颗粒用于降低扬声器模组的F0，提高低频性能，透声隔离件70可防止吸音颗粒进入到后声腔62的其它区域，有利于保护扬声器单体30，本实施方式中透声隔离件70优选为网布。
如图1、图2和图3共同所示，本实施方式中上壳10由第一上壳12和第二上壳14结合而成，扬声器单体30固定在第一上壳12与下壳20之间，扬声器单体30与第一上壳12共同围成前声腔60。填充腔620位于扬声器单体30的一侧，第一上壳12的内侧设有向后声腔62内延伸的固定边框120，透声隔离件70的边缘固定在固定边框120上，透声隔离件70水平设置，将后声腔62分隔为上、下两个腔体，位于上侧的腔体即为填充腔620。第一上壳12对应填充腔620上方的区域为敞口结构，第二上壳14覆盖在敞口结构处，填充腔620由第一上壳12、第二上壳14和透声隔离件70共同围成，通孔140位于第二上壳14上。
如图1、图3和图4共同所示，位于通孔140周边的第二上壳14上设有凹陷的定位槽142，此定位槽142在第二上壳14的内侧形成一凸台结构。通孔140位于定位槽142的中心位置，阻尼50粘接固定在定位槽142内，在本实施例中，通孔140的孔径为1mm～5mm。本实施方式中优选在阻尼50的侧壁与定位槽 142的侧壁之间填充有密封胶80，即阻尼50的周围涂有密封胶80，可增强阻尼50与第二上壳14之间的粘接力。
如图4所示，位于通孔140外端的上壳10上粘接固定有透声的阻尼50，阻尼50包括叠加在一起的具有微孔的阻尼膜52和透声片54，阻尼膜52通过胶层56粘接结合在第二上壳14上，透声片54为环形结构，通过胶层56粘接结合在阻尼膜52远离第二上壳14一侧的边缘位置，透声片54的中心孔与通孔140相对应，后声腔62通过透声片54的中心孔、阻尼膜52和通孔140与外界相通，透声片54与阻尼膜52之间也通过胶层56粘接为一体。本实施方式中优选胶层为双面胶，使用双面胶粘接方便，易操作，本实施例中，胶层的厚度0.01mm～0.3mm，孔径为1mm～6mm。
如图2和图4共同所示，本实施方式优选透声片54的外周形状和尺寸与阻尼膜52的外周形状和尺寸相一致，本实施方式中阻尼膜52为圆形结构，透声片54为圆环形结构，但实际应用中并不限于圆形结构，方形、椭圆形等只要能覆盖住通孔140即可。
本实施方式中优选阻尼膜52的材质为网布、透声膜或无纺布中的一种，本实施例中，网布厚度为0.03mm～0.15mm，开孔率1％～20％，透声膜的材质优选为EFEP(氟树脂)、EPTFE(膨体聚四氟乙烯)或TPU(热塑性聚氨酯弹性体橡胶)中的一种，但并不限定为上述的几种，阻尼膜52可以为一层结构，也可以为多层的复合结构：由上述涉及的多种材质中的两种或多种组成的多层膜。透声片54的材质选择具有一定刚性的材料，本实施方式中优选透声片54的材质为金属片或硬质塑料片，其中硬质塑料片优选为PET(聚对苯二甲酸乙二醇酯)片、PC(聚碳酸酯)片、PP(聚丙烯)片或ABS(丙烯腈-丁二烯-苯乙烯)片中的一种，但并不限定为上述的几种，只要具有一定刚性，能起到定形作用的材料均可，透声片54也可以为一层片或多层片的任意复合，在本实施例中，透声片54的厚度为0.03mm～1mm，中心孔的孔径为1mm～5mm，且本实施方式优选透声片54的孔径小于通孔140的孔径。
如图1、图2和图3共同所示，扬声器模组还包括FPCB(柔性印刷线路板) 40，FPCB 40用于电连接扬声器单体30与外部电路，FPCB 40位于模组内腔的一端设有两个电连接部，分别与扬声器单体30的两个焊盘电连接，FPCB 40的另一端穿出模组内腔与外部电路电连接。
实施例二：
如图5所示，本实施方式与实施例一基本相同，其不同之处在于：
环形的透声片54通过胶层粘接结合在第二上壳14上，阻尼膜52通过胶层粘接结合在透声片54远离第二上壳14的一侧。
实施例三：
如图6所述，本实施方式与实施例一或实施例二基本相同，其不同之处在于：
定位槽142的底部沿周向设有多个热熔柱144，阻尼50上对应热熔柱144的位置分别设有与热熔柱144相适配的热熔孔141，在粘接阻尼50时，热熔柱144从热熔孔141内穿过，然后通过热熔工艺将热熔柱144露出阻尼50的端部热熔成小帽结构，将阻尼50固定在第二上壳14上，可更进一步的防止阻尼50从第二上壳14上脱落。
本实用新型将现有技术中的吸音颗粒灌装孔与泄漏孔合二为一，在组装时仅需要粘贴一个阻尼，而不再需要粘贴密封片，从而降低了外壳的加工难度，减少了扬声器模组的组装工序和作业人员，降低了生产成本；同时还降低了漏气及阻尼脱落的风险，提高了扬声器模组的可靠性和使用寿命。
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需要填充吸音颗粒的扬声器模组中，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，只要是将原有的灌装孔与泄漏孔合二为一用以降低加工难度和生产成本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 (14)

  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，所述扬声器单体将整个模组内腔分隔为前声腔和后声腔两个腔体，其特征在于，所述外壳上设有用于灌装吸音颗粒的通孔，所述通孔兼做所述后声腔与外界之间的用于气压均衡的泄漏孔。
  2. 根据权利要求1所述的扬声器模组，其特征在于，所述后声腔通过透声隔离件分隔有用于填充吸音颗粒的填充腔，所述填充腔的位置与所述通孔对应。
  3. 根据权利要求1所述的扬声器模组，其特征在于，所述外壳上固定有用于覆盖所述通孔的阻尼，所述阻尼包括叠加设置的具有微孔的阻尼膜和透声片，所述后声腔通过所述透声片的中心孔、所述阻尼膜和所述通孔与外界相通。
  4. 根据权利要求3所述的扬声器模组，其特征在于，位于所述通孔周边的所述外壳上设有凹陷的定位槽，所述阻尼固定在所述定位槽内。
  5. 根据权利要求4所述的扬声器模组，其特征在于，所述阻尼的侧部与所述定位槽的侧壁之间填充有密封胶。
  6. 根据权利要求4所述的扬声器模组，其特征在于，所述定位槽的底部设有热熔柱，所述阻尼上设有供所述热熔柱穿过的热熔孔。
  7. 根据权利要求2所述的扬声器模组，其特征在于，所述外壳包括结合在一起的上壳和下壳，所述上壳的内侧设有向模组内腔延伸的固定边框，所述透声隔离件水平固定在所述固定边框上并将所述后声腔分隔为上下两个腔体，位于上侧的所述腔体为所述填充腔；所述通孔设置在所述上壳上。
  8. 根据权利要求7所述的扬声器模组，其特征在于，所述上壳包括结合为一体的第一上壳和第二上壳，所述固定边框设置在所述第一上壳上，所述第二上壳覆盖在所述填充腔的上方与所述第一上壳和所述透声隔离件共同围成所述填充腔；所述通孔设置在所述第二上壳上。
  9. 根据权利要求3所述的扬声器模组，其特征在于，所述透声片的外周形状和尺寸与所述阻尼膜的外周形状和尺寸相一致，所述通孔的孔径为1mm～5mm，所述透声片的厚度为0.03mm～1mm，所述透声片的中心孔的孔径为1mm～5mm。
  10. 根据权利要求3所述的扬声器模组，其特征在于，所述阻尼通过第一胶层粘接固定在所述外壳上，所述透声片与所述阻尼膜之间通过第二胶层粘接为一体。
  11. 根据权利要求10所述的扬声器模组，其特征在于，所述第一胶层和第二胶层厚度为0.01mm～0.3mm，孔径为1mm～6mm。
  12. 根据权利要求3所述的扬声器模组，其特征在于，所述透声片的材质为金属片或硬质塑料片，所述硬质塑料片为PET片、PC片、PP片或ABS片中的一种。
  13. 根据权利要求3所述的扬声器模组，其特征在于，所述阻尼膜的材质为网布、透声膜或无纺布中的一种，所述透声膜的材质为EFEP、EPTFE或TPU中的一种。
  14. 根据权利要求13所述的扬声器模组，其特征在于，所述网布的厚度为0.03mm～0.15mm，开孔率为1％～20％。
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