WO2021093338A1 - 一种微型发声装置和电子产品 - Google Patents

一种微型发声装置和电子产品 Download PDF

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Publication number
WO2021093338A1
WO2021093338A1 PCT/CN2020/099477 CN2020099477W WO2021093338A1 WO 2021093338 A1 WO2021093338 A1 WO 2021093338A1 CN 2020099477 W CN2020099477 W CN 2020099477W WO 2021093338 A1 WO2021093338 A1 WO 2021093338A1
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WO
WIPO (PCT)
Prior art keywords
housing assembly
melting
miniature
diaphragm
fixedly connected
Prior art date
Application number
PCT/CN2020/099477
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English (en)
French (fr)
Inventor
葛连山
王兴龙
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歌尔股份有限公司
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Publication of WO2021093338A1 publication Critical patent/WO2021093338A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • 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
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; 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 present invention belongs to the technical field of electroacoustic energy conversion. Specifically, the present invention relates to a miniature sound generating device.
  • Micro-sounding devices are important components in consumer electronic products. They are used to convert electrical signals into sound. They are indispensable components in consumer electronic products such as mobile phones and earphones. In order to use complex application environments, waterproof performance has become an important indicator of micro-sounding devices.
  • the diaphragm In the existing miniature sounding device, the diaphragm is often fixedly connected with the housing or the bearing part of the sounding device by means of glue coating.
  • adhesive bonding cannot meet the requirements of waterproof performance.
  • An object of the present invention is to provide an improved miniature sound generating device.
  • a miniature sound emitting device including:
  • a vibrating component comprising a diaphragm, the diaphragm having a folded ring portion and a fixed portion, the folded ring portion extends in a ring shape, and the fixed portion is formed around the periphery of the folded ring portion;
  • the housing assembly the diaphragm is arranged on the housing assembly, the fixing part is fused and fixedly connected with the housing assembly to form a melting zone, the width of the melting zone is the melting width, and the melting width is equal to The range is 0.1mm-1.0mm.
  • the fixing portion and the housing assembly are fused and fixedly connected by laser hot melting.
  • the temperature range of laser melting is 120 degrees Celsius-450 degrees Celsius.
  • the material of the housing component is at least one of polycarbonate plastic, polyphthalamide plastic, and polyether plastic with a thiophenyl group.
  • the material of the diaphragm is at least one of polyether ether ketone plastic, polyarylate plastic, and thermoplastic polyester rubber.
  • the difference between the melting temperature of the part of the structure forming the melting band on the housing assembly and the vibrating membrane and the melting temperature of the vibrating membrane is less than 60 degrees Celsius.
  • the miniature sound emitting device includes a flat portion extending laterally outward from the folding ring portion, and the flat portion is fixed to the housing assembly connection.
  • the flat portion and the housing assembly are fused and fixedly connected to form the melting zone, and the melting width ranges from 0.1 mm to 0.7 mm.
  • the fixing portion includes a flanging extending longitudinally from the plane portion, the flanging is fused and fixedly connected with the side surface of the housing assembly to form the melting band, and the melting width is in the range of 0.2 mm-1.0mm.
  • the fixing portion includes a flange extending longitudinally from the folding ring portion, and the flange is fused and fixedly connected with the side surface of the housing assembly to form the melting band, and the range of the melting width is 0.2mm-1.0mm.
  • Another aspect of the present invention also provides an electronic product, which includes:
  • the main body of electronic products The main body of electronic products
  • the micro-sounding device is arranged in the main body of the electronic product, and the micro-sounding device is electrically connected with the signal connector in the main body of the electronic product.
  • the technical effect of the present invention is that the waterproof performance between the diaphragm and the housing assembly in the micro-sound device is significantly improved.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a miniature sound emitting device provided by the present invention
  • Figure 2 is an exploded schematic diagram of some parts of the miniature sounding device provided by the present invention.
  • Figure 3 is a partial side cross-sectional view of the micro-sounding device provided by the present invention.
  • FIG. 4 is a side cross-sectional view of a micro-sounding device according to another embodiment of the present invention.
  • Fig. 5 is a side cross-sectional view of a micro-sounding device according to another embodiment of the present invention.
  • the present invention provides an improved miniature sound emitting device, which comprises a vibration component and a shell component.
  • the vibration component includes a diaphragm.
  • the vibration component is a component capable of vibrating and realizing the sound production function in the miniature sound generating device, and the vibration component may also include components such as a voice coil, which is not limited by the present invention.
  • the diaphragm can drive the air to vibrate and generate sound during the vibration process.
  • the diaphragm 1 has a folding ring portion 11 and a fixing portion 12.
  • the folding ring portion 11 has a bent structure, which extends into an annular structure.
  • the folded ring portion 11 and the area surrounded by the folded ring portion 11 are parts that can vibrate up and down.
  • the fixing portion 12 is formed around the periphery of the folding ring portion 11, and the fixing portion 12 is a part that is fixedly connected to other components of the miniature sound emitting device.
  • the housing assembly 2 is used to carry the vibration assembly and other components in the micro-sounding device.
  • the housing assembly 2 constitutes the main frame of the micro-sounding device, and the inside of the housing assembly 2 can accommodate components such as voice coils and magnets.
  • the upper structure of the housing assembly 2 is used to form a fixed connection with the diaphragm 1 for supporting the diaphragm 1.
  • the diaphragm 1 is arranged on the housing assembly 2, and the fixing portion 12 and the housing assembly 2 are fused and fixedly connected in the form of hot fusion to form a melting band 10.
  • the fixing portion 12 and the housing assembly 2 are melted and fixed to form an integral structure, and the two have good tightness and tightness of connection.
  • the part of the fixing part 12 forming the fusion belt 10 is integrated with the housing assembly 2.
  • the melting belt 10 has a belt-like structure, and its width is the melting width.
  • the melting width ranges from 0.1 mm to 1.0 mm. If the melting width is less than 0.1mm, on the one hand, it will increase the difficulty of the melting and fixing connection process, and it is difficult for the processing technology to achieve smaller size heating. Waterproof reliability is reduced. On the contrary, if the melting width is greater than 1.0mm, on the one hand, when the fusion fixing connection process is performed, the heating range is too large, which may damage other areas in the micro-sound device.
  • the width of the fusion fixing connection method is less than In the case of 1.0mm, it can already meet the requirements of good waterproof performance, and there is no need to design the melting width too wide. Reducing the melting width can save space and reduce the volume of the micro-sounding device.
  • the melting width ranges from 0.15mm to 0.7mm.
  • the waterproof effect of the diaphragm and the housing assembly is significantly improved.
  • the space occupied by this waterproofing process is greatly reduced, and the use of waterproof glue is also substantial. Decrease, thereby reducing the production cost of the micro-sounding device.
  • the structural reliability of the micro-sounding device has also been improved. In the later life test, problems such as cracking between the diaphragm and the housing assembly are not easy to occur, and the two realize a tight and reliable fixed connection.
  • the present invention by controlling the size of the melting width, it can not only meet the waterproof performance but also effectively control the space occupation, and meet the performance and structure requirements of the electronic product for the miniature sounding device.
  • the fixing portion and the housing assembly are fixedly connected by laser melting.
  • the local and instantaneous high temperature generated by the laser can melt the surface of the housing assembly and the fixed part of the diaphragm, and fuse the two together. After the laser irradiation is canceled, the fusion belt can be quickly cooled and the fixed part and the surface of the housing assembly form an integrated adhesion structure, which achieves a good fixed connection and waterproof sealing effect.
  • the laser melting process has the characteristics of short heating time, accurate heating temperature, and concentrated heating area, which can not only meet the requirements of melting and connecting the fixed part and the housing assembly, but also effectively reduce the risk of heating damage to other parts of the micro sound device.
  • the temperature of the high-temperature endurance test is much lower than the temperature of the laser melting process, and the fixing part and the shell assembly will not melt, which avoids the diaphragm and the shell. The problem of component cracking and detachment.
  • the temperature range of the laser melting is between 120 degrees Celsius and 450 degrees Celsius.
  • materials with a melting temperature within the above-mentioned temperature range can be selected. In this way, when a laser is used to irradiate the area where the fixing part and the housing assembly overlap, the temperature of the area rises to this area, and the fixing part and the housing assembly can be melted.
  • the above-mentioned preferred temperature range can protect the other components of the micro-sound device and reduce the risk of being damaged by high temperature; on the other hand, it can ensure that both the fixing part and the housing assembly are melted and cooled as soon as possible, shortening the processing time, and making The fixed part and the shell assembly form a clear and neat fusion zone.
  • the shell component 2 preferably uses a material that has a melting temperature similar to that of the diaphragm, and preferably the difference between the melting temperature of the shell component and the melting temperature of the diaphragm is less than 60 degrees Celsius.
  • the diaphragm 1 and the housing assembly 2 are hot-melt fixedly connected, it is easy to control the hot-melt temperature, and there is no need to raise the melting temperature to an excessively high temperature, avoiding damage to other components of the micro-sounding device.
  • the hot melt temperature is raised to an appropriate temperature, the housing assembly and the fixed part can be melted at the same time.
  • the melting temperature and vibration of the part of the structure used to form the melting zone with the diaphragm on the housing assembly are determined.
  • the difference in the melting temperature of the film is controlled within the range of 60 degrees Celsius, so that the proper melting temperature can be used to perform the fusion fixing connection process.
  • the material of the housing component may be at least one of polycarbonate plastic, polyphthalamide plastic, and polyether plastic with a thiophenyl group.
  • these materials have a proper melting temperature. When the housing components are heated to the melting temperature of the above-mentioned materials used, other parts of the micro sound device are not easily affected by the temperature to cause damage, failure and other problems.
  • these materials have relatively excellent melting connectivity and relatively close melting temperatures with the diaphragm. Since the diaphragm needs to have good elastic deformation and vibration and sound performance, the material used for the diaphragm is limited by its acoustic performance.
  • the above-mentioned material preferably used for the housing assembly can achieve a good fusion connection with the material of the diaphragm, and has a melting temperature similar to the material of the diaphragm.
  • the housing assembly is made of the above-mentioned materials, it is melted and fixed.
  • the connection process is easier to implement and has higher reliability.
  • the material of the diaphragm may be at least one of polyether ether ketone plastic, polyarylate plastic, and thermoplastic polyester rubber.
  • the diaphragm made of the above-mentioned materials can exhibit good acoustic performance, and the elastic deformation ability can meet the sound demand of the miniature sound emitting device. Further, the above-mentioned materials are easier to form a fusion fixed connection with other plastic materials, and the compatibility is higher.
  • the material of the diaphragm can be selected as a light-transmitting material
  • the material of the housing component can be selected as a light-absorbing material.
  • the laser needs to pass through the fixing part to apply heat radiation to the housing assembly.
  • the material of the diaphragm is selected as a light-transmitting material
  • the laser light can pass through the fixing portion and be directed onto the housing component, so that the surface of the housing component can be quickly heated and melted.
  • the material of the housing assembly is selected as a light-absorbing material, other parts located around the housing assembly will not be irradiated by the laser, and the direct heat radiation received is greatly reduced.
  • This design method can provide temperature protection for structures other than the fixed part of the diaphragm and the housing assembly, and reduce the possibility of direct laser heat radiation for other structures.
  • the fixing part and the partial structure of the housing assembly covered by the fixing part can be rapidly heated and melted together to achieve the effect of rapid melting, and then rapidly cooled to form a fusion fixed connection.
  • the fixing portion 12 includes a flat portion 121 extending laterally outward from the folding ring portion.
  • the flat portion and the housing assembly form a fixed connection to meet the requirement that the diaphragm 1 can be fixedly connected to the housing assembly.
  • the fixing part may also include other forms of structure, which is not limited in the present invention.
  • the flat portion 121 is fused and fixedly connected to the housing assembly 2 to form the fusion belt 10.
  • the flat portion 121 can be fused to the upper surface of the housing assembly 2.
  • This connection form has a simple structure and high sealing reliability.
  • the melting width of the melting zone 10 formed by the flat portion 121 ranges from 0.1 mm to 0.7 mm.
  • the melting width refers to the width extending in the transverse direction. Using the connection form shown in Fig. 3, when the melting width is less than or equal to 0.7mm, higher waterproof and sealing requirements can be met.
  • the fixing portion 12 may further include a flange 122.
  • the fixing part includes a flat part 121 and a flange 122.
  • the flange 122 is a structure formed by extending longitudinally from the edge of the planar portion 121.
  • the flat portion 121 is fixedly connected to the upper surface of the housing assembly 2, which may adopt a form of fusion fixed connection, or other forms of fixed connection such as bonding, which is not limited in the present invention.
  • the flange 122 extends to the side surface of the housing assembly 2 and forms a fusion fixed connection with the side surface of the housing assembly 2. In the embodiment shown in FIG.
  • the flat portion 121 and the flange 122 can form a semi-enclosed wrapping connection relationship with the housing assembly 2, and the flat portion 121 is fixed on the upper surface of the housing assembly 2, so The flange 122 is fixed on the side surface of the housing assembly 2.
  • the fusion width refers to the width of the fusion belt 10 in the longitudinal direction.
  • the melting width ranges from 0.2 mm to 1.0 mm. If the fusion zone 10 formed by the flange 122 is too narrow, on the one hand, it will be difficult to effectively improve the waterproof performance of the micro-sound device. On the other hand, when the diaphragm is assembled on the housing assembly, it will be turned over. The edge 122 is prone to wrinkles and other problems, and it is difficult to lay flat on the side wall of the housing assembly.
  • the fusion zone 10 formed by the flanging 122 is too wide, on the one hand, it will increase the difficulty of forming the diaphragm. On the other hand, the flanging will occupy too much space.
  • the high temperature radiation The area is large, which may cause high-temperature damage to other parts of the micro-sounding device.
  • both the flat portion 121 and the flange 122 can be fused and fixedly connected with the housing assembly 2 to form an integral fusion belt 10.
  • the fusion zone may have an L-shaped cross section.
  • the melting width includes a transversely extending part and a longitudinally extending part, and the melting width is preferably 0.2mm-1.0mm.
  • the flange 122 can also be fused and fixedly connected with the housing assembly 2 by means of laser melting. While performing the laser melting process on the fixing portion 12 and the housing assembly 2, laser can also be applied to the position of the flanging 122, so as to implement the structure of the flanging 122 and the part of the housing assembly covered by it. The heating is melted, so that the flange 122 and the housing assembly form a fusion and fixed connection.
  • the advantage of this embodiment is that the flanging can be melted and fixed while the flat portion is melted and fixed, and the processing process is simple, and the required processing steps will not increase.
  • the fusion and fixed connection can be quickly realized by one-time laser melting, which can reduce the possibility of sound softening and deformation of the shell assembly, and prevent abnormal structural stability.
  • the fixing portion 12 may only include a longitudinally extending flange 122, and the flange 122 is directly connected to the folding ring portion 11 and extends along the longitudinal direction.
  • the flange 122 is fused and fixedly connected with the side surface of the housing assembly 2 to form the fusion belt 10.
  • the advantage of this embodiment is that the fixed portion 12 occupies less lateral space of the micro-sounding device.
  • an inner edge may be formed on the housing assembly 2, and the flange 122 extends downward to form a fusion fixed connection with the inner edge of the top of the housing assembly 2. This design can completely prevent the fixing part from extending to the edge of the micro-sounding device.
  • the flange 122 may also extend to the outer side wall of the housing assembly 2, which is similar to the embodiment shown in FIG. 4, except that the plane portion 121 shown in FIG. 4 is eliminated.
  • the miniature sound generating device may also include components such as a voice coil 3, a centering support piece 4, and a magnetic circuit system, as shown in Figs. 3 and 4.
  • the magnetic circuit system is arranged in the housing assembly and is used to generate a magnetic field.
  • the voice coil 3 may be connected to the diaphragm or centering support piece 4.
  • the voice coil 3 is located inside the housing assembly, and is suspended in the magnetic field generated by the magnetic circuit system. When there is a sound signal in the voice coil, the voice coil can vibrate under the action of the magnetic field. Further, the voice coil can drive the voice coil and the centering piece to vibrate, and the voice coil vibrates to generate sound.
  • a part of the structure of the centering support piece may form a fixed connection with the fixing part, and the other part may form a connection with the inside of the area surrounded by the folding ring part through a cantilever.
  • a part of the structure of the centering brace is fixed in the miniature sounding device, and the other part can vibrate with the diaphragm and the voice coil.
  • the centering support piece can restrain the polarization and stabilize the vibration of the voice coil and the vibration of the diaphragm.
  • the present invention also provides an electronic product.
  • the electronic product may be a mobile phone, a computer, a headset, a VR headset, a smart watch, etc., which is not limited by the present invention.
  • the electronic product includes the main body of the electronic product and the above-mentioned micro-sounding device.
  • the micro-sounding device is arranged in the main body of the electronic product.
  • the micro-sounding device is electrically connected with the signal connector in the main body of the electronic product to conduct the sound signal into the micro-sounding device to realize vibration and sound.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Telephone Set Structure (AREA)

Abstract

本发明公开了一种微型发声装置和电子产品。该微型发声装置包括：振动组件，所述振动组件包括振膜，所述振膜具有折环部和固定部，所述折环部呈环形延伸，所述固定部环绕形成于所述折环部的外围；壳体组件，所述振膜设置在所述壳体组件上，所述固定部与所述壳体组件熔融固定连接以形成熔融带，所述熔融带的宽度为熔融宽度，所述熔融宽度的范围为0.1mm-1.0mm。本发明的一个技术效果在于本发明的一个技术效果在于能够提高振膜与壳体组件之间的防水性能。

Description

一种微型发声装置和电子产品 技术领域
本发明属于电声换能技术领域，具体地，本发明涉及一种微型发声装置。
背景技术
近年来，消费类电子产品的技术发展迅速，手机、平板电脑、无线耳机等电子产品广泛应用于消费者的生活中。相应地，生产厂商也对电子产品的性能进行了多方面的改进，以满足消费类电子产品在实际应用中所面临的越来越严苛的性能要求。
微型发声装置是消费类电子产品中的重要零部件，其用于将电信号转换成声音，在手机、耳机等消费类电子产品中是不可或缺的部件。为了使用复杂的应用环境，防水性能成为微型发声装置的一项重要指标。
现有的微型发声装置中，振膜往往通过涂胶粘接的方式与发声装置中的壳体或承载部件形成固定连接。但是，涂胶粘接并不能够满足防水性能的要求。一旦微型发声装置的振膜处渗漏液体，液体浸入微型发声装置的内部，其功能可靠性将受到极大的影响。
为了使微型发声装置能够达到防水性能的要求，有必要对微型发声装置进行改进。
发明内容
本发明的一个目的是提供一种改进的微型发声装置。
根据本发明的第一方面，提供了一种微型发声装置，包括：
振动组件，所述振动组件包括振膜，所述振膜具有折环部和固定部，所述折环部呈环形延伸，所述固定部环绕形成于所述折环部的外围；
壳体组件，所述振膜设置在所述壳体组件上，所述固定部与所述壳体 组件熔融固定连接以形成熔融带，所述熔融带的宽度为熔融宽度，所述熔融宽度的范围为0.1mm-1.0mm。
可选地，所述固定部与所述壳体组件采用激光热熔的方式熔融固定连接。
可选地，激光热熔的温度范围为120摄氏度-450摄氏度。
可选地，所述壳体组件的材料为聚碳酸酯塑料、聚邻苯二甲酰胺塑料、具有苯硫基的聚醚塑料中的至少一种。
可选地，所述振膜的材料为聚醚醚酮塑料、聚芳酯塑料、热塑性聚酯橡胶中的至少一种。
可选地，所述壳体组件上与所述振膜形成所述熔融带的部分结构的融化温度与所述振膜的融化温度的差小于60摄氏度。
可选地，根据权利要求1所述的微型发声装置，其特征在于，所述固定部包括从所述折环部沿横向向外延伸的平面部，所述平面部与所述壳体组件固定连接。
可选地，所述平面部与所述壳体组件熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.1mm-0.7mm。
可选地，所述固定部包括从所述平面部沿纵向延伸的翻边，所述翻边与所述壳体组件的侧面熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.2mm-1.0mm。
可选地，所述固定部包括从所述折环部沿纵向延伸的翻边，所述翻边与所述壳体组件的侧面熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.2mm-1.0mm。
本发明的另一方面还提供了一种电子产品，所述电子产品包括：
电子产品主体；
上述微型发声装置，所述微型发声装置设置在所述电子产品主体内，所述微型发声装置与所述电子产品主体内的信号连接件形成电连接。
本发明的技术效果在于，微型发声装置中振膜与壳体组件之间的防水性能显著提高。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其 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是本发明提供的微型发声装置的立体结构示意图；
图2是本发明提供的微型发声装置的部分部件爆炸示意图；
图3是本发明提供的微型发声装置的局部侧面剖视图；
图4是本发明提供的另一种实施方式的微型发声装置的侧面剖视图；
图5是本发明提供的另一种实施方式的微型发声装置的侧面剖视图。
具体实施方式
现在将参照附图来详细描述本发明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发明的范围。
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，决不作为对本发明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。
本发明提供了一种改进的微型发声装置，该微型发声装置包括振动组件和壳体组件。振动组件包括了振膜。所述振动组件为微型发声装置中能够振动、实现发声功能的部件，振动组件还可以包括音圈等部件，本发明不对此进行限制。
其中，振膜在振动过程中能够带动空气振动进而产生声音。如图1、2所示，所述振膜1具有折环部11和固定部12。所述折环部11呈弯折结构，其延伸成一环形结构。折环部11以及折环部11所环绕的区域是能够上下振动的部分。所述固定部12则环绕形成在所述折环部11的外围，所述固定部12是与微型发声装置的其它部件固定连接的部分。
所述壳体组件2用于承载所述振动组件以及微型发声装置中的其它部件，所述壳体组件2构成微型发声装置的主体框架，其内部可以容纳音圈、磁铁等部件。同时，壳体组件2的上部结构用于与所述振膜1形成固定连接，用于承载振膜1。
如图3所示，所述振膜1设置在所述壳体组件2上，其固定部12与壳体组件2以热熔的形式，熔融固定连接，进而形成熔融带10。固定部12与壳体组件2熔融固定呈一体结构，两者之间具有良好的连接紧密性、密封性。
固定部12的形成熔融带10的部分与壳体组件2融为一体。所述熔融带10呈带状结构，其宽度为熔融宽度。优选地，所述熔融宽度的范围为0.1mm-1.0mm。熔融宽度若小于0.1mm，一方面会给熔融固定连接工艺提高难度，加工工艺难以实现更小尺寸的加热，另一方面，熔融宽度过小也会造成振膜1与壳体组件2之间的防水可靠性下降。相反的，如果熔融宽度大于1.0mm，一方面，进行熔融固定连接工艺时，需要加热的范围过大，有可能损伤微型发声装置中的其它区域，另一方面，熔融固定连接方式的宽度在小于1.0mm的情况下就已经能够达到良好的防水性能要求，无需将熔融宽度设计的过宽。减小熔融宽度能够节省空间、缩小微型发声装置的体积。优选地，熔融宽度的范围为0.15mm-0.7mm。
通过熔融固定连接的密封连接工艺，振膜与壳体组件的防水效果得到显著提升，这种防水工艺相对于传统的涂胶防水工艺所占用的空间大幅减小，对防水胶的使用量也大幅下降，进而降低了微型发声装置的生产成本。另一方面，微型发声装置的结构可靠性也得到了提升，在后期的寿命实验中，振膜与壳体组件之间也不易出现开裂等问题，两者实现紧密、可靠的固定连接。
在本发明的技术方案中，通过控制所述熔融宽度的尺寸，既能够满足防水性能又能够有效控制空间占用，满足了电子产品对微型发声装置的性能和结构要求。
可选地，所述固定部与所述壳体组件采用激光熔融的方式固定连接。利用激光产生的局部、瞬时的高温，能够将所述壳体组件的表面和振膜的固定部融化，使两者熔融在一起。取消激光照射后，熔融带能够快速冷却后固定部与壳体组件的表面形成一体粘连结构，实现良好的固定连接和防水密封效果。激光熔融工艺具有加热时间短、加热温度准确、升温区域集中的特点，既能够满足将固定部与壳体组件熔融连接，又能够有效降低微型发声装置的其它部件受到加热损坏的风险。另一方面，在对微型发声装置进行可靠性、寿命测试时，高温耐久测试的温度远低于激光熔融工艺的温度，固定部和壳体组件不会发生熔融现象，避免了振膜与壳体组件开裂、脱离的问题。
可选地，所述激光熔融的温度范围为120摄氏度-450摄氏度之间。对于振膜以及壳体组件的材料，可以选取融化温度在上述温度范围区间内的材料。这样，在采用激光对固定部与壳体组件重叠的区域进行照射时，该区域温度上升到该区域后，固定部和壳体组件就能够融化。上述优选的温度范围一方面能够对微型发声装置的其它部件起到保护作用，降低被高温损坏的风险；另一方面可以保证固定部和壳体组件两者尽快熔融、冷却，缩短加工时间，使固定部与壳体组件形成边界清晰、整洁的熔融带。
优选地，所述壳体组件2优选采用了与振膜具有相近融化温度的材料，优选使得壳体组件的融化温度与振膜的融化温度之差小于60摄氏度。这样，在对振膜1和壳体组件2进行热熔固定连接时，容易对热熔温度进行控制，而且，无需将熔融温度提升至过高温度，避免对微型发声装置的其它部件造成损害。在将热熔温度上升到适当的温度时，壳体组件和固定部能够同时融化。
通过对壳体组件和振膜的材料进行选择，以及对壳体组件的结构进行设计，将所述壳体组件上用于与所述振膜形成所述熔融带的部分结构的融化温度以及振膜的融化温度的差值控制在60摄氏度范围以内，从而可以使 用恰当的熔融温度执行熔融固定连接工艺。
例如，所述壳体组件的材料可以是聚碳酸酯塑料、聚邻苯二甲酰胺塑料、具有苯硫基的聚醚塑料中的至少一种。首先，这些材料具有适当的融化温度，在将壳体组件加热到所采用的上述材料的融化温度时，微型发声装置的其它部件不易受到温度影响发生损坏、失效等问题。第二，这些材料与振膜之间具有相对优秀的熔融连接性和相对接近的融化温度。由于振膜需要具有良好的弹性形变、振动发声的性能，因此振膜所采用的材料受到声学性能的限制。而上述优选用于壳体组件的材料能够与振膜的材料实现良好的熔融连接，与振膜的材料具有相近的融化温度，在采用上述材料制成所述壳体组件的情况下，熔融固定连接工艺更容易实现，可靠性更高。
可选地，所述振膜的材料可以是聚醚醚酮塑料、聚芳酯塑料、热塑性聚酯橡胶中的至少一种。上述材料所制成的振膜能够表现出良好的声学性能，弹性形变能力可以满足微型发声装置的发声需求。进一步地，上述材料更容易与其它塑料材料形成熔融固定连接，相容性更高。
优选地，所述振膜的材料可以选择为透光材料，而所述壳体组件的材料则可以选择为吸光材料。在对固定部和壳体组件进行激光熔融固定连接工艺时，由于固定部覆盖在壳体组件上，因此，激光需要透过所述固定部对所述壳体组件施加热辐射。而如果将振膜的材料选为透光材料，则激光能够透过所述固定部直射至所述壳体组件上，更好的使壳体组件的表面快速升温融化。进一步地，如果将壳体组件的材料选择为吸光材料，则位于壳体组件周围的其它部件就不会被激光照射，受到的直接热辐射大幅减小。这种设计方式能够对除了振膜的固定部和壳体组件之外的结构提供温度保护作用，降低其它结构受到直接激光热辐射的可能性。而且，通过设计透光的振膜，所述固定部和固定部所覆盖的壳体组件的部分结构，能够一同快速升温融化，实现快速熔融的效果，进而快速冷却形成熔融固定连接。
可选地，如图3所述，所述固定部12包括从所述折环部沿横向向外延伸的平面部121。所述平面部与所述壳体组件形成固定连接，以满足振膜1能够固定连接在壳体组件上的需求。所述固定部还可以包括其它形式的结构，本发明不对此进行限制。
进一步可选地，在如图3所示的实施方式中，所述平面部121与所述壳体组件2熔融固定连接，以形成所述熔融带10。平面部121可以与壳体组件2的上表面熔融连接，这种连接形式结构简洁、密封可靠性高。优选地，平面部121所形成的熔融带10的熔融宽度的范围为0.1mm-0.7mm。该熔融宽度指的是沿横向延伸的宽度。采用图3所示的连接形式，熔融宽度在小于或等于0.7mm的情况下，就能够满足较高的防水、密封需求。
可选地，所述固定部12还可以包括翻边122。在如图4所示的实施方式中，所述固定部包括了平面部121和翻边122。所述翻边122是从所述平面部121的边缘沿纵向延伸形成的结构。所述平面部121与所述壳体组件2的上表面固定连接，其可以采用熔融固定连接的形式，也可以采用粘接等其它固定连接的形式，本发明不对此进行限制。所述翻边122则向所述壳体组件2的侧面延伸，其与所述壳体组件2的侧面形成熔融固定连接。在图4所示的实施方式中，所述平面部121和翻边122能够对所述壳体组件2形成半包围式的包裹连接关系，平面部121固定在壳体组件2的上表面，所述翻边122固定在壳体组件2的侧表面。通过这种结构设计，振膜与壳体组件之间的连接可靠性和防水性能得到进一步的显著提升。防水性能能够满足绝大多数微型发声装置的防水性能等级要求。
在仅以所述翻边122与所述壳体组件2形成所述熔融带10的实施方式中，所述熔融宽度指熔融带10沿纵向的宽度。优选地，所述熔融宽度的范围为0.2mm-1.0mm。如果翻边122所形成的熔融带10的过窄，一方面难以有效的对微型发声装置的防水性能起到实质性的提高，另一方面，在将振膜装配于壳体组件上时，翻边122容易出现褶皱等问题，难以平铺与壳体组件的侧壁上。相反的，如果翻边122所形成的熔融带10的过宽，一方面会增加振膜的成型难度，另一方面，翻边占用的空间过大，在进行熔融固定连接的工艺时，高温辐射的面积较大，有可能对微型发声装置的其它零部件造成高温损伤。
优选地，在如图4所示的实施方式中，所述平面部121和翻边122均可以与所述壳体组件2熔融固定连接，形成一个整体的熔融带10。在这种实施方式中，所述熔融带的截面可以呈L型。所述熔融宽度包括了横向延 伸的部分和纵向延伸的部分，熔融宽度优选为0.2mm-1.0mm。
优选地，所述翻边122也可以通过激光熔融的方式与所述壳体组件2形成熔融固定连接。在对所述固定部12和壳体组件2进行激光熔融工艺的同时，也可以对所述翻边122的位置处施加激光，从而将翻边122以及其所覆盖的部分壳体组件的结构实施加热融化，进而使翻边122与壳体组件形成熔融固定连接。这种实施方式的优点在于能够在对平面部进行熔融固定的同时实现翻边的熔融固定，加工工艺的过程简单，所需的加工步骤不会增加。而且，由于平面部和翻边是包围在壳体组件的边角位置，通过一次激光熔融快速实现熔融固定连接，能够降低壳体组件发声软化、变形的可能性，防止结构稳定性出现异常。
在另一种实施方式中，如图5所示，所述固定部12可以只包括纵向延伸的翻边122，翻边122直接连接在所述折环部11上，并沿着纵向延伸。翻边122与所述壳体组件2的侧面熔融固定连接，以形成所述熔融带10。这种实施方式的优点在于，所述固定部12占用的微型发声装置的横向空间更少。可选地，如图5所示，壳体组件2上可以形成内侧沿，所述翻边122向下延伸，与壳体组件2顶部的内侧沿形成熔融固定连接。这样设计可以完全使固定部不延伸至微型发声装置的边缘。可选地，在另一种实施方式中，翻边122也可以延伸至壳体组件2的外侧壁处，类似于图4所示的实施方式，取消图4所示的平面部121。
所述微型发声装置中还可以包括音圈3、定心支片4、磁路系统等部件，如图3、4所示。所述磁路系统设置在所述壳体组件内，其用于产生磁场。所述音圈3可以连接在所述振膜或定心支片4上。音圈3位于壳体组件内部，其悬于所述磁路系统产生的磁场内。当音圈内通入有声音信号时，音圈在磁场的作用下能够产生振动。进一步地，音圈能够带动音圈和定心支片产生振动，音圈振动产生声音。所述定心支片的一部分结构可以与所述固定部形成固定连接，另一部分通过悬臂与所述折环部所环绕的区域内部形成连接。这样，定心支片的一部分结构固定在微型发声装置中，另一部分能够随着振膜、音圈发生振动。定心支片能够对音圈、振膜的振动起到抑制偏振、稳定振动的作用。
本发明还提供了一种电子产品，该电子产品，可以是手机、电脑、耳机、VR头戴设备、智能手表等，本发明不对此进行限制。电子产品包括了电子产品主体和上述微型发声装置。所述微型发声装置设置所述电子产品主体内。微型发声装置与所述电子产品主体内的信号连接件形成电连接，以将声音信号导通到微型发声装置内，实现振动发声。
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 (11)

  1. 一种微型发声装置，其特征在于，包括：
    振动组件，所述振动组件包括振膜，所述振膜具有折环部和固定部，所述折环部呈环形延伸，所述固定部环绕形成于所述折环部的外围；
    壳体组件，所述振膜设置在所述壳体组件上，所述固定部与所述壳体组件熔融固定连接以形成熔融带，所述熔融带的宽度为熔融宽度，所述熔融宽度的范围为0.1mm-1.0mm。
  2. 根据权利要求1所述的微型发声装置，其特征在于，所述固定部与所述壳体组件采用激光热熔的方式熔融固定连接。
  3. 根据权利要求2所述的微型发声装置，其特征在于，激光热熔的温度范围为120摄氏度-450摄氏度。
  4. 根据权利要求1所述的微型发声装置，其特征在于，所述壳体组件的材料为聚碳酸酯塑料、聚邻苯二甲酰胺塑料、具有苯硫基的聚醚塑料中的至少一种。
  5. 根据权利要求1所述的微型发声装置，其特征在于，所述振膜的材料为聚醚醚酮塑料、聚芳酯塑料、热塑性聚酯橡胶中的至少一种。
  6. 根据权利要求1所述的微型发声装置，其特征在于，所述壳体组件上与所述振膜形成所述熔融带的部分结构的融化温度与所述振膜的融化温度的差小于60摄氏度。
  7. 根据权利要求1所述的微型发声装置，其特征在于，所述固定部包括从所述折环部沿横向向外延伸的平面部，所述平面部与所述壳体组件固定连接。
  8. 根据权利要求7所述的微型发声装置，其特征在于，所述平面部与所述壳体组件熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.1mm-0.7mm。
  9. 根据权利要求7或8所述的微型发声装置，其特征在于，所述固定部包括从所述平面部沿纵向延伸的翻边，所述翻边与所述壳体组件的侧面熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.2mm-1.0mm。
  10. 根据权利要求1所述的微型发声装置，其特征在于，所述固定部包括从所述折环部沿纵向延伸的翻边，所述翻边与所述壳体组件的侧面熔融固定连接形成所述熔融带，所述熔融宽度的范围为0.2mm-1.0mm。
  11. 一种电子产品，其特征在于，包括：
    电子产品主体；
    权利要求1-10任意之一所述的微型发声装置，所述微型发声装置设置在所述电子产品主体内，所述微型发声装置与所述电子产品主体内的信号连接件形成电连接。
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Citations (4)

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CN205726379U (zh) * 2016-03-09 2016-11-23 歌尔股份有限公司 扬声器单体
CN206413186U (zh) * 2016-12-29 2017-08-15 歌尔科技有限公司 发声装置
US20170332174A1 (en) * 2016-05-11 2017-11-16 Samsung Electronics Co., Ltd. Slim acoustic transducer and image display apparatus having the same
CN208821056U (zh) * 2018-10-26 2019-05-03 歌尔科技有限公司 一种发声装置单体及发声装置模组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205726379U (zh) * 2016-03-09 2016-11-23 歌尔股份有限公司 扬声器单体
US20170332174A1 (en) * 2016-05-11 2017-11-16 Samsung Electronics Co., Ltd. Slim acoustic transducer and image display apparatus having the same
CN206413186U (zh) * 2016-12-29 2017-08-15 歌尔科技有限公司 发声装置
CN208821056U (zh) * 2018-10-26 2019-05-03 歌尔科技有限公司 一种发声装置单体及发声装置模组

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