CN110913320B - Vibrating diaphragm assembly forming method of sound generating device, vibrating diaphragm assembly and sound generating monomer - Google Patents

Vibrating diaphragm assembly forming method of sound generating device, vibrating diaphragm assembly and sound generating monomer Download PDF

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Publication number
CN110913320B
CN110913320B CN201911096289.0A CN201911096289A CN110913320B CN 110913320 B CN110913320 B CN 110913320B CN 201911096289 A CN201911096289 A CN 201911096289A CN 110913320 B CN110913320 B CN 110913320B
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diaphragm
assembly
forming
vibrating diaphragm
micro
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CN110913320A (en
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宋启龙
解志浩
王昭明
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Goertek Inc
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Goertek Inc
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Priority to PCT/CN2019/129527 priority patent/WO2021093113A1/en
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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
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • 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
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/001—Moulding aspects of diaphragm or surround
    • 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

Abstract

The invention provides a method for forming a vibrating diaphragm component of a sound production device, wherein the vibrating diaphragm component comprises a vibrating diaphragm body and an auxiliary component, and the method comprises the following steps: providing a forming die, wherein an inner cavity of the forming die is provided with an inner cavity surface; providing an auxiliary assembly, wherein the surface of the auxiliary assembly is provided with a micro-nano structure; arranging an auxiliary assembly in a forming die, wherein the surface of the auxiliary assembly provided with the micro-nano structure and the inner cavity surface form a forming surface for forming the vibrating diaphragm body; filling a vibrating diaphragm body material in an inner cavity of the forming die to manufacture a vibrating diaphragm body, wherein the surface of the auxiliary assembly provided with the micro-nano structure is connected with the vibrating diaphragm body; and demolding the diaphragm body and the auxiliary assembly. The invention also provides a diaphragm component formed by using the forming method and a sound production monomer with the diaphragm component. The diaphragm component obtained by the forming method of the diaphragm component has higher strength and small deformation shrinkage, and the assembled sounding monomer has better waterproof sealing property and excellent acoustic performance.

Description

Vibrating diaphragm assembly forming method of sound generating device, vibrating diaphragm assembly and sound generating monomer
Technical Field
The invention relates to the technical field of acoustics, in particular to a vibrating diaphragm component forming method of a sound generating device, a vibrating diaphragm component and a sound generating monomer.
Background
The loudspeaker is used as a device for converting electric energy into sound energy, and is widely applied to mobile terminals such as mobile phones, computers, pads and the like. The sound reproduction effect of the terminal device is directly influenced by the quality of the device performance. The diaphragm is one of the key parts for the loudspeaker to produce sound, and the requirements on the diaphragm are higher and higher, and the diaphragm gradually develops towards the directions of high strength, high sound quality and high waterproof and airtight performance.
The rubber material represented by silica gel gradually becomes a special material for the loudspeaker diaphragm, and the silica gel is also used as a waterproof preferable material for the loudspeaker due to the characteristics of high fluidity, high resilience, weather resistance, low surface energy and the like. In the prior art, silica gel is mostly formed by injection molding and die pressing, and is mostly formed by injection molding with a shell and a hard ball top in an integrated manner in order to improve the waterproof performance of a silica gel vibrating diaphragm. Adopt shell and integrative injection moulding of silica gel, though can improve the adhesive force of silica gel vibrating diaphragm and shell from the structure, it is higher to the processing cost requirement of mould. The mold needs to be designed precisely to meet the structural requirements of the diaphragm. Although the high cost requirement of the mold is satisfied, peeling occurs occasionally due to poor reliability of surface bonding of the hard dome, the housing holder and the rubber diaphragm.
Therefore, there is a need for an improvement of the diaphragm assembly forming method of the prior sound generating device, so as to improve the bonding reliability of the diaphragm and other parts of the sound generating device.
Disclosure of Invention
The invention aims to provide a method for forming a diaphragm assembly of a sound production device.
Another object of the present invention is to provide a diaphragm assembly, which is formed by the above-mentioned forming method.
The third purpose of the invention is to provide a sound generating single body, wherein the vibrating diaphragm assembly is arranged in the sound generating single body.
A method for forming a diaphragm assembly of a sound production device, wherein the diaphragm assembly comprises a diaphragm body and an auxiliary assembly, and comprises the following steps:
providing a forming die, wherein an inner cavity of the forming die is provided with an inner cavity surface;
providing an auxiliary assembly, wherein the surface of the auxiliary assembly is provided with a micro-nano structure;
arranging the auxiliary assembly in a forming die, wherein the surface of the auxiliary assembly provided with the micro-nano structure and the inner cavity surface form a forming surface for forming the vibrating diaphragm body;
filling a vibrating diaphragm body material in an inner cavity of the forming die to manufacture a vibrating diaphragm body, wherein the surface of the auxiliary assembly, provided with the micro-nano structure, is connected with the vibrating diaphragm body;
and demolding the diaphragm body and the auxiliary assembly.
Optionally, the auxiliary component includes a hard dome, and the hard dome is connected to the diaphragm body through a surface having the micro-nano structure.
Optionally, the auxiliary assembly includes a diaphragm support, and the diaphragm support is connected to the diaphragm body through a surface having the micro-nano structure.
Optionally, the forming method of the diaphragm body is hot press forming.
Optionally, the molding surface is covered with a release material.
Optionally, the material of the diaphragm body is a rubber material.
Optionally, the micro-nano structure is a convex structure and/or a concave structure.
Optionally, the height of the convex structures or the depth of the concave structures is 2 μm-30 μm.
Optionally, the convex and/or concave structures are circular with a maximum outer contour dimension set in a range between 5 μm and 100 μm.
Optionally, the pitch of two adjacent convex structures or concave structures along the arrangement direction is in a range between 5 μm and 200 μm.
A vibrating diaphragm component of a sound production device is formed by the forming method of the vibrating diaphragm component;
the diaphragm component comprises a diaphragm body and an auxiliary component;
the surface of the auxiliary assembly is provided with a micro-nano structure, and the surface with the micro-nano structure is used for forming the diaphragm body.
A sound producing cell comprising:
the vibration assembly comprises the vibrating diaphragm assembly and a voice coil;
a magnetic circuit system configured to provide a magnetic field for the voice coil;
the voice coil is configured to vibrate under the action of a magnetic field when an electric signal is input, and transmit the vibration to the diaphragm assembly, and the diaphragm assembly generates a sound signal through vibration.
The technical scheme of the invention has the beneficial effects that: the vibrating diaphragm component obtained by the forming method of the vibrating diaphragm component has high strength and small deformation shrinkage, and the assembled sounding monomer has good waterproof sealing performance and excellent acoustic performance.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a diaphragm assembly according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a micro-nano structure of a hard dome according to an embodiment of the present invention;
FIG. 3 is a schematic view of a diaphragm assembly according to an embodiment of the present invention;
the figures are labeled as follows: 10-hard ball top; 20-a voice coil; 30-a diaphragm body; 40-a diaphragm support.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The diaphragm material of a loudspeaker has a significant influence on the performance of the loudspeaker. Rubber materials represented by silica gel are gradually becoming special materials for loudspeaker diaphragms. In the prior art, in order to improve the waterproof performance of the silica gel vibrating diaphragm, the silica gel vibrating diaphragm is mostly integrally formed by injection molding with a shell and a hard ball top. Adopt shell and integrative injection moulding of silica gel, though can improve the adhesive force of silica gel vibrating diaphragm and shell from the structure, it is higher to the processing cost requirement of mould. The mold needs to be designed precisely to meet the structural requirements of the diaphragm. Although the requirement of high cost of the mold is satisfied, peeling caused by poor reliability of surface bonding of the hard dome, the diaphragm support and the rubber diaphragm still occurs occasionally. Therefore, there is a need for an improvement of the diaphragm assembly forming method of the prior sound generating device, so as to improve the bonding reliability of the diaphragm and other parts of the sound generating device.
The invention provides a method for forming a vibrating diaphragm assembly of a sound production device, wherein the vibrating diaphragm assembly comprises a vibrating diaphragm body and an auxiliary assembly, and the method for forming the vibrating diaphragm assembly comprises the following steps: providing a forming die, wherein an inner cavity of the forming die is provided with an inner cavity surface; providing an auxiliary assembly, wherein the surface of the auxiliary assembly is provided with a micro-nano structure; arranging the auxiliary assembly in a forming die, wherein the surface of the auxiliary assembly provided with the micro-nano structure and the inner cavity surface form a forming surface for forming the vibrating diaphragm body; filling a vibrating diaphragm body material in an inner cavity of the forming die to manufacture a vibrating diaphragm body, wherein the surface of the auxiliary assembly, provided with the micro-nano structure, is connected with the vibrating diaphragm body; and demolding the diaphragm body and the auxiliary assembly.
Specifically, as shown in fig. 1, the diaphragm assembly includes a diaphragm body 30 and an auxiliary assembly. Sound generating mechanism includes voice coil loudspeaker voice coil and magnet, and the vibrating diaphragm body is connected with the voice coil loudspeaker voice coil in sound generating mechanism, and the voice coil loudspeaker voice coil is used for letting in the signal of telecommunication, and it vibrates under the magnetic field effect that the magnet produced to with vibration transmission with its vibrating diaphragm body of being connected, vibrating diaphragm body vibration sound production. The auxiliary component is used to shape the diaphragm body.
The forming method of the diaphragm assembly comprises the following steps: and providing a forming die of the vibrating diaphragm component, wherein an inner wall surface is arranged in an inner cavity of the forming die. The forming die can be a metal die. The metal mold has small thermal deformation amount, can provide stable pressure, and can be used for forming the vibrating diaphragm assembly to obtain the vibrating diaphragm assembly with high strength, stable structure and small size error. The vibrating diaphragm component has a good improvement effect on the acoustic performance of the sound production device. The forming method further comprises the step of providing an auxiliary assembly, wherein micro-nano structures are formed on the surface of the auxiliary assembly and are uniformly distributed on the surface of the auxiliary assembly. The auxiliary assembly is arranged in a forming die of the vibrating diaphragm assembly, the surface of the auxiliary assembly provided with the micro-nano structure and the inner cavity surface of the forming die form a forming surface together, and the forming surface is used for forming the vibrating diaphragm body. Optionally, the auxiliary assembly is fixedly arranged in the forming die. As an embodiment, the auxiliary assembly may be fixed in the molding die by means of adhesion. Alternatively, the auxiliary components are held in a fixed position relative to each other in the molding die by means of mutual interlocking of shapes. The fixing mode of the auxiliary assembly can be selected by the person skilled in the art according to the needs. The forming method further comprises the step of filling a vibrating diaphragm body material in an inner cavity of the forming die to form a vibrating diaphragm body, wherein the surface, provided with the micro-nano structure, of the auxiliary assembly is connected with the vibrating diaphragm body. In the invention, the auxiliary component is used for molding the diaphragm body, namely the auxiliary component is used for being integrally molded with the diaphragm body in a molding die. And a micro-nano structure is formed on the surface of the diaphragm body formed in the forming die, which is connected with the auxiliary assembly. The vibrating diaphragm body and the auxiliary assembly are connected with each other through surfaces with micro-nano structures respectively. The molding method further comprises demolding the diaphragm body and the auxiliary assembly. And after the diaphragm body is molded, the diaphragm body and the auxiliary assembly are ejected from the molding die together.
According to the invention, the micro-nano structure is arranged on the surface of the auxiliary assembly, the surface of the auxiliary assembly with the micro-nano structure and the inner cavity surface of the forming mold form a forming surface for forming the vibrating diaphragm body, and the connecting body of the vibrating diaphragm body and the auxiliary assembly is obtained through forming. The existence of micro-nano structure can effectively improve the joint strength of vibrating diaphragm body and auxiliary assembly, and this has important contribution to sound generating mechanism's waterproof leakproofness and acoustic performance. Directly with auxiliary assembly and vibrating diaphragm body integrated into one piece, not only can simplify the connection process of auxiliary assembly and vibrating diaphragm body, reduce the use of prior art's adhesive, reduce environmental pollution, utilize the overall dimension of the fashioned vibrating diaphragm subassembly of mould can satisfy higher required precision moreover, the deflection of vibrating diaphragm subassembly is little, is favorable to improving sound generating mechanism's distortion and the poor problem of compliance, improves sound generating mechanism's acoustic performance.
Optionally, as shown in fig. 1, the auxiliary component includes a hard ball top 10, and the hard ball top is connected to the diaphragm body through a surface having the micro-nano structure.
The auxiliary component comprises a hard ball top 10, and the hard ball top is connected with the vibrating diaphragm body as a reinforcing part of the vibrating diaphragm body and is used for adjusting the high and low frequencies of the vibrating diaphragm. Specifically, the diaphragm body includes a central portion to which a hard dome is connected. As shown in fig. 2, the surface of the hard dome is provided with a micro-nano structure, the hard dome is used to mold the diaphragm body, and the micro-nano structure is formed at the center of the obtained diaphragm body. The vibrating diaphragm body and the hard ball top are connected with each other through the surfaces with the micro-nano mechanisms respectively, and the formed connecting body has higher strength. During the in-service use, the difficult phenomenon that takes place stereoplasm ball top and drop from the vibrating diaphragm body has effectively prolonged sound generating mechanism's life.
Optionally, the material of the hard dome is metal or thermoplastic. The material of the hard dome can also be a composite structure formed by metal/thermoplastic plastics and foaming bodies. The hard ball top is set into a composite structure, so that the hard ball top has comprehensive mechanical properties and processability of metal/thermoplastic plastics and foaming bodies.
Optionally, as shown in fig. 1, the auxiliary assembly includes a diaphragm support 40, and the diaphragm support is connected to the diaphragm body 30 through a surface having the micro-nano structure. Of course, the diaphragm support is not limited to the structure of the embodiment, and the diaphragm support refers to a structure or a component that can be used to support and fix the diaphragm; for example, the diaphragm support may be a casing of the sound generating apparatus, as shown in this embodiment; or, when the diaphragm is fixed with the magnetic circuit system, the diaphragm support refers to the magnetic circuit system part combined with the diaphragm fixing part; or, the diaphragm support refers to a support member for supporting and fixing the diaphragm to form the diaphragm assembly, and the diaphragm support may be made of plastic or metal material, and the structure may be an annular structure surrounding the edge of the diaphragm, which is not limited to this material or annular structure. It should be understood that the choice of the diaphragm support is not limited to the above-described structure, as long as it can function as a structure or a member that supports and fixes the diaphragm and is in contact with the diaphragm.
The auxiliary component comprises a diaphragm support 40, which provides a supporting function for the diaphragm body. The vibrating diaphragm body can be connected with the shell of the sound generating device through the vibrating diaphragm support. Specifically, the diaphragm body includes a fixing portion, and the diaphragm holder is connected to the fixing portion. The surface of vibrating diaphragm support is equipped with micro-nano structure, utilizes vibrating diaphragm support shaping vibrating diaphragm body, and the fixed part of the vibrating diaphragm body that obtains is formed with micro-nano structure. The diaphragm body and the diaphragm support are connected with each other through the surfaces with the micro-nano mechanisms respectively, and the formed connecting body has higher strength. In the working process of the vibrating diaphragm body, the vibrating diaphragm support provides stable support for the vibrating diaphragm body, so that the polarization of the vibrating diaphragm body can be reduced, and the acoustic performance of the sound production device is improved. Simultaneously, the vibrating diaphragm body is not easy to fall off from the vibrating diaphragm support, and the service life of the sound generating device can be effectively prolonged.
Optionally, the material of the diaphragm support 40 is plastic. The material selection of the diaphragm support should ensure that deformation does not easily occur during the molding process of the diaphragm body. Therefore, the selected material needs to have better strength and temperature resistance. The present invention is not limited to specific materials, and those skilled in the art can select them as needed. Optionally, the diaphragm support is formed by an injection molding process.
The micro-nano structure on the surfaces of the hard ball top and the diaphragm support can be processed by machining, electric discharge treatment, laser treatment, etching process, sand blasting process, plasma, corona treatment, physical vapor deposition or chemical vapor deposition and other processing modes, preferably by the electric discharge treatment, the laser treatment and the sand blasting process, and the obtained surface has good quality.
Optionally, the forming method of the diaphragm body 30 is hot press forming.
The hot press molding process may be injection molding or compression molding, which is not limited in the present invention. The hot press molding process can also be other molding modes capable of providing pressure and heat, and the skilled person can select the molding mode according to actual needs. The vibrating diaphragm body formed by the hot-press forming process is high in size precision, stable in appearance and not prone to deformation, has high mechanical strength and temperature resistance, cannot deform due to vibration heat production in the using process of the vibrating diaphragm body, and guarantees the acoustic performance of the sound generating device. Preferably, the hot press molding process may be compression molding. Adopt compression molding mode can provide even stable pressure to each part of vibrating diaphragm body, preferentially adopt metal mold, it has the characteristics that the heat conductivity is good, processing is convenient, with low costs, the vibrating diaphragm body stable in quality, the deformation that the shaping obtained are little.
Optionally, the molding surface is covered with a release material.
The problem of difficulty in demoulding of the vibrating diaphragm assembly can be prevented by covering the demoulding material on the forming surface, the deformation of the vibrating diaphragm assembly during demoulding is reduced, and the appearance size of the vibrating diaphragm assembly is ensured to meet the design and use requirements. The release material may be applied by gluing or coating. The release material may be a liquid release agent or a solid release cloth. The invention does not require the demoulding material and the covering mode of the demoulding material, and the skilled person can select the demoulding material according to the factors such as the material of the vibrating diaphragm body and the like.
Optionally, the material of the diaphragm body is a rubber material.
The vibrating diaphragm body can be made of rubber materials. The rubber material has better fluidity, and the overall dimension of the vibrating diaphragm body obtained by molding can more easily meet the design requirement. The vibrating diaphragm body obtained by using the rubber material has higher strength and can meet the requirement of the working condition of repeated vibration. Specifically, the rubber material may be silicone rubber, fluorine rubber, acrylate rubber, ethylene propylene diene rubber, or the like. Of course, other rubbers may be used as the material of the diaphragm body, and the invention is not limited thereto.
Optionally, the micro-nano structure is a convex structure and/or a concave structure.
The micro-nano structure can be a plurality of convex structures formed on the surface of the auxiliary assembly, and the micro-nano structure protrudes out of the surface. The micro-nano structure can also be set to be a concave structure lower than the surface of the auxiliary component. Or the micro-nano structure exists in a form of mixing a convex structure and a concave structure, and the convex structure and the concave structure are uniformly distributed on the surface of the auxiliary assembly. The arrangement mode can further improve the connection strength of the auxiliary assembly and the vibrating diaphragm body.
Optionally, the height of the convex structures or the depth of the concave structures is 2 μm to 10 μm.
When the micro-nano structure is a convex structure, the height of the convex structure is 2-30 μm; when the micro-nano structure is a concave structure, the depth of the micro-nano structure is 2-30 μm. The height or the depth of the micro-nano structure is set within the range of 2-30 microns, so that the wetting degree of the rubber material of the vibrating diaphragm body on the surface of the auxiliary component and the connection strength of the auxiliary component and the vibrating diaphragm body are improved, and the problems that the using amount of rubber is too much and the acoustic performance of the sound production device is reduced due to the increase of the whole weight of the vibrating diaphragm component can be solved.
Optionally, the shape of the convex or concave structure is circular or/polygonal. As an embodiment, the shape of the micro-nano structure can be set to be circular, so that the micro-nano structure is conveniently formed, the wettability of a rubber material is improved, and the connection strength of the diaphragm body and the auxiliary assembly is further improved.
Optionally, as shown in FIG. 2, the maximum outer contour dimension d1 of the shape of the convex and/or concave structures is 5 μm-100 μm.
In particular, the shape of the concave and/or convex structures may be provided as a circle, the largest outer contour dimension d1 of which is the diameter of the circle. The maximum outer contour dimension d1 of the shape of the concave or convex structure is set within the range of 5-100 μm, namely the dimension of the concave or convex structure is kept within the micro-nano dimension range, so that the influence on the surface flatness of the diaphragm body is small on the one hand, and the rubber material has good wettability on the micro-nano mechanism within the dimension range on the other hand, thereby being beneficial to improving the connection strength of the diaphragm body and the auxiliary component and improving the acoustic performance of the sound generating device. Meanwhile, the micro-nano structure in the size range has larger surface energy, and can effectively promote the improvement of the connection strength.
Alternatively, as shown in FIG. 2, the distance d2 between two adjacent convex or concave structures along the arrangement direction is 5 μm to 200 μm. The convex structures or concave structures can be arranged along the transverse direction or the longitudinal direction, and the distance d2 between two adjacent convex structures or concave structures is 5-200 μm. In fig. 3, the micro-nano mechanism of the hard dome surface is shown, and the distance d2 between two adjacent convex structures or concave structures is 10-100 μm. Alternatively, the convex structures or the concave structures can be arranged along the circumferential direction, and the distance d2 between two adjacent convex structures or concave structures is 5-200 μm. The arrangement of the convex structures or the concave structures is not limited by the invention, and can be selected by the skilled person according to the needs. The distance d2 between two adjacent convex structures or concave structures is set to be 5-200 μm, so that the connection strength of the diaphragm body and the auxiliary component can be greatly improved, and the acoustic performance of the sound generating device is excellent. Optionally, the convex or concave structures are uniformly arranged on the surface of the diaphragm, so that the micro-nano structure can be conveniently processed.
The invention also provides a vibrating diaphragm component of the sound production device, wherein the vibrating diaphragm component is formed by using the forming method of the vibrating diaphragm component; the diaphragm component comprises a diaphragm body and an auxiliary component; the surface of the auxiliary assembly is provided with a micro-nano structure, and the surface with the micro-nano structure is used for forming the diaphragm body. The vibrating diaphragm component obtained by the forming method has high connection strength, the phenomenon that the auxiliary component is separated from the vibrating diaphragm body is not easy to occur when the vibrating diaphragm component is used, and the service life of the sound generating device is long.
The invention also provides a sounding monomer, which comprises: a vibration assembly including the above-mentioned diaphragm assembly and voice coil 20; a magnetic circuit system configured to provide a magnetic field for the voice coil; the voice coil is configured to vibrate under the action of a magnetic field when an electric signal is input, and transmit the vibration to the diaphragm assembly, and the diaphragm assembly generates a sound signal through vibration.
As shown in fig. 3, the vibration module is adhesively attached to the casing of the sound generating unit, and then the voice coil is attached to the center portion of the diaphragm body by using an adhesive. Alternatively, the voice coil 20 and the hard dome are attached to two opposite surfaces of the center portion, respectively.
The vibrating diaphragm body obtained by the vibrating diaphragm component forming method has better surface flatness, and the voice coil is bonded on the vibrating diaphragm component, so that the centrality of the voice coil can be ensured, and the sound production performance of the sound production monomer with the vibrating diaphragm component is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (12)

1. A method for forming a diaphragm assembly of a sound production device, wherein the diaphragm assembly comprises a diaphragm body and an auxiliary assembly, and the method is characterized by comprising the following steps:
providing a forming die, wherein an inner cavity of the forming die is provided with an inner cavity surface;
providing an auxiliary assembly, wherein the surface of the auxiliary assembly is provided with a micro-nano structure;
arranging the auxiliary assembly in a forming die, wherein the surface of the auxiliary assembly provided with the micro-nano structure and the inner cavity surface form a forming surface for forming the vibrating diaphragm body;
filling a vibrating diaphragm body material in an inner cavity of the forming die to manufacture a vibrating diaphragm body, wherein the surface of the auxiliary assembly, provided with the micro-nano structure, is connected with the vibrating diaphragm body;
and demolding the diaphragm body and the auxiliary assembly.
2. The method for forming a diaphragm assembly of a sound generating apparatus according to claim 1, wherein the auxiliary assembly includes a hard dome, and the hard dome is connected to the diaphragm body through a surface having the micro-nano structure.
3. The method for forming a diaphragm assembly of a sound generating apparatus according to claim 1, wherein the auxiliary assembly includes a diaphragm support, and the diaphragm support is connected to the diaphragm body through a surface having the micro-nano structure.
4. The method for molding a diaphragm assembly of a sound generating apparatus as claimed in claim 1, wherein the method for molding the diaphragm body is a hot press molding.
5. The method for molding a diaphragm assembly of a sound generating apparatus as claimed in claim 1, wherein the molding surface is covered with a release material.
6. The method for forming a diaphragm assembly of a sound generating apparatus as claimed in claim 1, wherein the material of the diaphragm body is a rubber material.
7. The method for forming a diaphragm assembly of a sound generating apparatus according to claim 1, wherein the micro-nano structure is a convex structure and/or a concave structure.
8. The method for molding a diaphragm assembly of a sound generating apparatus as claimed in claim 7, wherein the height of the convex structure or the depth of the concave structure is 2 μm to 30 μm.
9. The method for forming a diaphragm assembly of a sound generating apparatus as claimed in claim 7, wherein the convex structure and/or the concave structure is circular.
10. The method for forming a diaphragm assembly of a sound generating apparatus as claimed in claim 7, wherein a pitch between two adjacent convex structures or two adjacent concave structures along an arrangement direction is in a range between 5 μm and 200 μm.
11. A diaphragm component of a sound production device is characterized in that,
the diaphragm assembly is molded using the molding method of the diaphragm assembly as claimed in any one of claims 1 to 10;
the diaphragm component comprises a diaphragm body and an auxiliary component;
the surface of the auxiliary assembly is provided with a micro-nano structure, and the surface with the micro-nano structure is used for forming the diaphragm body.
12. A sound producing cell, comprising:
a vibration assembly comprising the diaphragm assembly of claim 11 and a voice coil;
a magnetic circuit system configured to provide a magnetic field for the voice coil;
the voice coil is configured to vibrate under the action of a magnetic field when an electric signal is input, and transmit the vibration to the diaphragm assembly, and the diaphragm assembly generates a sound signal through vibration.
CN201911096289.0A 2019-11-11 2019-11-11 Vibrating diaphragm assembly forming method of sound generating device, vibrating diaphragm assembly and sound generating monomer Active CN110913320B (en)

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