Microphone waterproof structure, microphone and electronic equipment

Abstract

The invention discloses a microphone waterproof structure, a microphone and electronic equipment. The microphone waterproof structure comprises a waterproof layer and a hydrophobic layer, the hydrophobic layer is arranged on one side of the waterproof layer, a plurality of micro-nano protrusions are evenly arranged on the surface of the side, away from the waterproof layer, of the hydrophobic layer, and the hydrophobic layer is of a net structure. The side, away from the waterproof layer, of the hydrophobic layer is provided with a plurality of micro-nano protrusions used for achieving a hydrophobic effect, so that the waterproof effect is improved, and the hydrophobic layer is of a net-shaped structure and can ensure that sound signals normally enter the microphone. Moreover, the hydrophobic layer is arranged on the outer side of the waterproof layer, so that the waterproof structure has a better waterproof effect to meet the use requirement, and the waterproof layer can be made of a fluoride-free waterproof material, so that fluorine pollution can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and more specifically, to a microphone waterproof structure, a microphone and an electronic equipment. Background Art

[0002] In the related art, microphones are generally provided with waterproof membranes to ensure waterproof performance. In order to avoid environmental pollution caused by fluorine materials, the waterproof membranes generally use fluorine-free waterproof membranes. However, the current fluorine-free waterproof membranes have poor waterproof performance.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the invention

[0004] An object of the present invention is to provide a new technical solution for a microphone waterproof structure.

[0005] According to a first aspect of the present invention, a microphone waterproof structure is provided. The microphone waterproof structure comprises:

[0006] Waterproof layer;

[0007] The hydrophobic layer is located on one side of the waterproof layer, a surface of the hydrophobic layer on a side away from the waterproof layer is evenly provided with a plurality of micro-nano protrusions, and the hydrophobic layer is in a mesh structure.

[0008] Optionally, the hydrophobic layer includes a plurality of substrates, each of the substrates is provided with the protrusions at intervals, and the plurality of substrates form the hydrophobic layer with a mesh structure.

[0009] Optionally, the substrate is a stainless steel wire, and a plurality of the stainless steel wires are woven to form the hydrophobic layer.

[0010] Optionally, the pore size of the hydrophobic layer is 20 μm to 30 μm.

[0011] Optionally, the height of the protrusion is 10 nm to 50 nm.

[0012] Optionally, the protrusion is conical.

[0013] Optionally, a contact angle between a surface of the hydrophobic layer facing away from the waterproof layer and a liquid droplet is greater than or equal to 150°.

[0014] Optionally, the waterproof layer is a fluorine-free material.

[0015] According to a second aspect of the present invention, a microphone is provided, which includes the microphone waterproof structure of the above embodiment.

[0016] Optionally, the microphone further includes a PCB board, the PCB board is provided with a sound pickup hole, the waterproof layer is arranged in the sound pickup hole, the hydrophobic layer is arranged on the outer surface of the PCB board, and covers the sound pickup hole.

[0017] Optionally, the microphone further includes a protective layer, which is arranged on the outer surface of the PCB board and located outside the hydrophobic layer.

[0018] According to a third aspect of the present invention, an electronic device is provided, comprising the microphone of the above embodiment.

[0019] One technical effect of the present application is that the microphone waterproof structure includes a waterproof layer and a hydrophobic layer, the hydrophobic layer is arranged on one side of the waterproof layer, and the surface of the hydrophobic layer on the side away from the waterproof layer is evenly provided with a plurality of micro-nano protrusions for achieving a hydrophobic effect, thereby facilitating improving the waterproof effect, and the hydrophobic layer is in a mesh structure, which can ensure that the sound signal enters the microphone normally. In addition, by arranging the hydrophobic layer on the outside of the waterproof layer, it can be ensured that the waterproof structure has a good waterproof effect to meet the use requirements, and the waterproof layer can use a fluorine-free waterproof material, thereby avoiding fluorine pollution.

[0020] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 It is a partial structural diagram of a microphone according to an embodiment of the present application.

[0023] Figure 2 yes Figure 1 An enlarged view of point A is shown.

[0024] 1. Waterproof layer; 2. Hydrophobic layer; 3. PCB board; 31. Sound pickup hole; 4. Protective layer; 5. Cover; 6. MEMS chip; 7. ASIC chip. DETAILED DESCRIPTION

[0025] 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 components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0026] 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.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] According to one embodiment of the present application, a microphone waterproof structure is provided. Figure 1 and Figure 2 As shown, the microphone waterproof structure includes a waterproof layer 1 and a hydrophobic layer 2, wherein the hydrophobic layer 2 is located on one side of the waterproof layer 1, and a surface of the hydrophobic layer 2 facing away from the waterproof layer 1 is evenly provided with a plurality of micro-nano protrusions, and the hydrophobic layer 2 is in a mesh structure.

[0031] In this example, the microphone waterproof structure is arranged at the sound pickup hole 31 of the microphone, and is suitable for sealing the sound pickup hole 31 to prevent water or water vapor from entering the interior of the microphone. The microphone waterproof structure includes a waterproof layer 1 and a hydrophobic layer 2. The hydrophobic layer 2 is arranged on one side of the waterproof layer 1. The side of the hydrophobic layer 2 facing away from the waterproof layer 1 is provided with a plurality of protrusions for achieving a hydrophobic effect, thereby facilitating improving the waterproof effect of the waterproof structure. The hydrophobic layer 2 is a mesh structure, which can ensure that the sound signal can normally enter the interior of the microphone.

[0032] In addition, the waterproof layer 1 can be made of fluorine-free waterproof material to avoid fluorine pollution. By arranging the hydrophobic layer 2 on the outside of the waterproof layer 1, it can be ensured that the waterproof structure has a good waterproof effect to meet the use requirements. For example, the waterproof layer 1 can be made of PE (a waterproof film made of polyethylene resin as the main material), PS (a waterproof film made of polystyrene as the main material), silicone rubber film and other materials. Those skilled in the art can determine according to the actual situation, and no specific limitation is made here.

[0033] In this example, a plurality of protrusions are provided on the side of the hydrophobic layer 2 away from the waterproof layer 1, and the protrusions are micro-nano-scale protrusions. The plurality of protrusions are arranged at intervals to form a hydrophobic effect. The contact angle between the surface of the hydrophobic layer 2 on the side away from the waterproof layer 1 and the droplet is greater than or equal to 150°. By setting the intervals and structures of the protrusions, the hydrophobic layer 2 can achieve a super-hydrophobic effect. That is, super-hydrophobicity refers to a surface phenomenon in which the apparent contact angle of water on the surface is greater than 150°. For example, the surface of a lotus leaf is a super-hydrophobic surface. The hydrophobic layer 2 of the present application can be set to a protrusion structure such as the surface of a lotus leaf.

[0034] In this example, the microphone waterproof structure is arranged in the sound pickup hole 31 of the microphone, and is suitable for sealing the sound pickup hole 31. That is, the waterproof layer 1 is arranged in the sound pickup hole 31, the hydrophobic layer 2 is located on the outside of the waterproof layer 1, and the outer side of the hydrophobic layer 2 away from the waterproof layer 1 is provided with a protrusion. The hydrophobic layer 2 is a mesh structure. The mesh of the hydrophobic layer 2 is a micro-nano-scale hole, and the mesh can ensure that the sound signal normally enters the sound pickup hole 31 and then enters the inside of the microphone.

[0035] In one example, the hydrophobic layer 2 includes a plurality of substrates, each of the substrates is provided with the protrusions at intervals, and the plurality of substrates form the hydrophobic layer 2 with a mesh structure.

[0036] In this example, the hydrophobic layer 2 includes a plurality of substrates, which are arranged at intervals in the transverse direction and the longitudinal direction, respectively, so as to form a mesh-structured hydrophobic layer 2. A plurality of protrusions are arranged at intervals in the longitudinal direction on each substrate, and the plurality of substrates are spliced ​​to form a mesh-structured hydrophobic layer 2.

[0037] In one example, the substrate is a stainless steel wire, and a plurality of the stainless steel wires are woven to form the hydrophobic layer 2 .

[0038] In this example, the substrate may be a stainless steel wire, and a plurality of stainless steel wires are woven to form the hydrophobic layer 2. The stainless steel wire has high strength, and the hydrophobic layer 2 woven from the stainless steel wire can not only play a hydrophobic effect, but also play a protective role on the waterproof membrane.

[0039] In this example, a plurality of protrusions are provided on the stainless steel wire. The protrusions can be formed on the stainless steel wire by using nanoimprinting technology NIL or ultrafast laser etching technology, etc. Those skilled in the art can determine according to actual conditions, and no specific limitation is made here.

[0040] For example, when using nanoimprint technology, a polymer coating (e.g., polymethyl methacrylate, polystyrene, polycarbonate, etc.) is pre-attached to the stainless steel wire, and the template with the protruding nano pattern is brought into contact with the polymer coating through the corresponding equipment and apparatus, and is precisely imprinted and shaped. After certain conditions, such as setting the corresponding time, pressure, temperature, light, etc., the template is separated from the polymer coating, so that the pattern can be replicated and the nanostructure pattern on the template surface is transferred to the polymer coating. Then, etching technology or stripping technology is used to transfer the nanostructure pattern on the polymer coating to the substrate of the stainless steel wire to achieve the transfer of the nanostructure pattern.

[0041] In this example, a plurality of stainless steel wires may be woven into a mesh structure, and then protrusions may be provided on each stainless steel wire by nanoimprint technology NIL or ultrafast laser etching technology, so as to form a hydrophobic layer 2 of a mesh structure. Alternatively, protrusions may be provided on each stainless steel wire by nanoimprint technology NIL or ultrafast laser etching technology, and then a plurality of stainless steel wires may be woven into a mesh structure, so as to form a hydrophobic layer 2 of a mesh structure. Those skilled in the art may determine according to actual conditions, and no specific limitation is made here.

[0042] In this example, the substrate may also be made of other types of materials, and the substrate has a higher hardness and better high temperature resistance. Those skilled in the art may determine the substrate according to actual conditions, and no specific limitation is made here.

[0043] In one example, the pore size of the hydrophobic layer 2 is 20 μm to 30 μm.

[0044] In this example, the pore size of the hydrophobic layer 2 is too large, resulting in poor waterproof and dustproof and protective effects. If the pore size of the hydrophobic layer 2 is too small, the acoustic resistance will increase and affect the transmission of sound signals. In the present application, the pore size of the hydrophobic layer 2 is set to 20μm to 30μm so that the hydrophobic layer can have a better protective effect without affecting the transmission of sound signals. For example, the pore size of the hydrophobic layer 2 can be 20μm, 22μm, 25μm, 27μm or 30μm, etc. Those skilled in the art can determine according to the actual situation and are not specifically limited here.

[0045] In one example, the height of the protrusion is 10 nm to 50 nm.

[0046] In this example, the height of the protrusion on the hydrophobic layer 2 is too large and may form an obstacle, hindering the natural flow and sliding of water droplets on the surface, which will cause the water droplets to stay on the surface for a longer time, increasing the risk of water droplets penetrating or wetting the surface. When the protrusion height is too small, the effect of reducing the contact area and improving the hydrophobicity may not be obvious, and the too small protrusion may not be able to effectively block the infiltration and spreading of water droplets, thereby causing the hydrophobic performance to decrease. Therefore, in the present application, the height of the protrusion on the hydrophobic layer 2 is set to 10nm to 50nm, so that the hydrophobic layer 2 can have a good hydrophobic effect, which is conducive to forming a super-hydrophobic effect. For example, the height of the protrusion on the hydrophobic layer 2 can be 10nm, 15nm, 20nm, 30nm, 40nm, 45nm or 50nm, etc. Those skilled in the art can determine according to actual conditions and are not specifically limited here.

[0047] In one example, the protrusion is conical.

[0048] In this example, the protrusion of the hydrophobic layer 2 is conical, and the conical structure is sharp or nearly sharp at the top and wide at the bottom. This shape is conducive to the water droplet to form a more stable Cassie-Baxter state when in contact, that is, the water droplet is suspended on the composite interface composed of air and solid surface. The conical structure can also guide the water droplet to slide down the inclined surface, reducing the residence time of the water droplet on the surface. This is conducive to improving the hydrophobic effect of the hydrophobic layer 2. For example, the protrusion can be a conical structure or a pyramidal structure, or a structure close to a conical structure or a pyramidal structure.

[0049] In this example, the protrusions on the hydrophobic layer 2 may also be in other shapes, for example, a micro-nano columnar structure or a micro-nano spherical structure.

[0050] In another embodiment of the present application, a microphone is provided. Figure 1 As shown in the figure, the microphone includes the microphone waterproof structure of the above embodiment.

[0051] In this example, the microphone waterproof structure is arranged at the sound pickup hole 31 of the microphone, and is suitable for sealing the sound pickup hole 31 to prevent water or water vapor from entering the microphone. The microphone waterproof structure includes a waterproof layer 1 and a hydrophobic layer 2. The hydrophobic layer 2 is arranged on one side of the waterproof layer 1. The surface of the hydrophobic layer 2 on the side away from the waterproof layer 1 is evenly provided with a plurality of micro-nano protrusions for achieving a hydrophobic effect, thereby facilitating improving the waterproof effect of the waterproof structure. The hydrophobic layer 2 is a mesh structure, which can ensure that the sound signal enters the microphone normally.

[0052] In addition, the waterproof layer 1 can be made of fluorine-free waterproof material to avoid fluorine pollution. By setting the hydrophobic layer 2 on the outside of the waterproof layer 1, it can be ensured that the waterproof structure has a good waterproof effect to meet the use requirements. For example, the waterproof layer 1 can be made of PE (a waterproof film made of polyethylene resin as the main material), PS (a waterproof film made of polystyrene as the main material), silicone rubber film and other materials. Those skilled in the art can determine according to the actual situation, and no specific limitation is made here.

[0053] In one example, the microphone further includes a PCB board 3 , the PCB board 3 is provided with a sound pickup hole 31 , the waterproof layer 1 is arranged in the sound pickup hole 31 , the hydrophobic layer 2 is arranged on the outer surface of the PCB board 3 and covers the sound pickup hole 31 .

[0054] like Figure 1 As shown, in this example, the microphone includes a PCB board 3, and a cover body 5 is provided on one side of the PCB board 3. The cover body 5 and the PCB board 3 surround to form an inner cavity of the microphone, and a MEMS chip 6 and an ASIC chip 7 are arranged in the inner cavity, and the MEMS chip 6 and the ASIC chip 7 are connected to the PCB board 3. The MEMS chip 6 is opposite to the sound pickup hole 31.

[0055] like Figure 1 and Figure 2 As shown, in this example, a sound pickup hole 31 is provided through the PCB board 3 along the thickness direction, a waterproof layer 1 is provided in the sound pickup hole 31, and a hydrophobic layer 2 is provided on the outer surface of the PCB board 3 and covers the sound pickup hole 31. The hydrophobic layer 2 cooperates with the waterproof layer 1 to improve the waterproof effect. The hydrophobic layer 2 can also protect the waterproof layer 1.

[0056] The hydrophobic layer 2 and the PCB board 3 are pressed together so that the hydrophobic layer 2 is connected to the PCB board 3. Alternatively, the hydrophobic layer 2 can also be connected to the outer surface of the PCB board 3 by bonding or welding. Those skilled in the art can determine according to actual conditions, and no specific limitation is made here.

[0057] In an example, Figure 1 and Figure 2 As shown, the microphone further includes a protective layer 4 , which is disposed on the outer surface of the PCB board 3 and located at the periphery of the hydrophobic layer 2 .

[0058] like Figure 1 and Figure 2 As shown, a protective layer 4 is also provided on the outer surface of the PCB board 3, and the protective layer 4 can protect the PCB board 3. The protective layer 4 is provided on the periphery of the hydrophobic layer 2, for example, the protective layer 4 is provided around the hydrophobic layer 2, and the hydrophobic layer 2 can cooperate with the protective layer 4 to more comprehensively protect the PCB board 3.

[0059] like Figure 1 and Figure 2 As shown, in this example, the thickness of the protective layer 4 is equal to that of the hydrophobic layer 2, so that the surface of the microphone can be kept flat, thereby facilitating assembly or packaging.

[0060] In this example, the protective layer 4 may be a stainless steel sheet, which may be pressed against the PCB board 3 to connect the protective layer 4 to the PCB board 3. Alternatively, the protective layer 4 may also be connected to the outer surface of the PCB board 3 by bonding or welding.

[0061] Of course, the protective layer 4 may also be made of other materials, such as epoxy resin, etc. Those skilled in the art may determine the material according to actual conditions, and no specific limitation is made here.

[0062] In another embodiment of the present application, an electronic device is provided, which includes the microphone of the above embodiment.

[0063] In this example, the microphone is provided with a microphone waterproof structure, which is arranged at the sound pickup hole 31 of the microphone and is suitable for sealing the sound pickup hole 31 to prevent water or water vapor from entering the interior of the microphone. The microphone waterproof structure includes a waterproof layer 1 and a hydrophobic layer 2, wherein the hydrophobic layer 2 is arranged on one side of the waterproof layer 1, and a plurality of micro-nano protrusions are evenly arranged on the surface of the hydrophobic layer 2 on the side away from the waterproof layer 1, which are used to achieve a hydrophobic effect, thereby facilitating improving the waterproof effect of the waterproof structure, and the hydrophobic layer 2 is a mesh structure, which can ensure that the sound signal enters the interior of the microphone normally.

[0064] In addition, the waterproof layer 1 of the microphone waterproof structure can be made of fluorine-free waterproof material to avoid fluorine pollution. By setting a hydrophobic layer 2 on the outside of the waterproof layer 1, it can be ensured that the waterproof structure has a good waterproof effect to meet the use requirements. For example, the waterproof layer 1 can be made of PE (a waterproof film made of polyethylene resin as the main material), PS (a waterproof film made of polystyrene as the main material), silicone rubber film and other materials. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0065] Of course, the electronic device also includes at least all the beneficial effects of the above embodiments, which will not be elaborated here.

[0066] The electronic device may be a headset, a smart phone, a smart watch, a VR, an AR, or other electronic device. Those skilled in the art may determine the method according to the actual situation, and no specific limitation is made here.

[0067] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0068] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A microphone waterproof structure, characterized in that: include: Waterproof layer (1); A hydrophobic layer (2), the hydrophobic layer (2) is located on one side of the waterproof layer (1), a surface of the hydrophobic layer (2) facing away from the waterproof layer (1) is evenly provided with a plurality of micro-nano protrusions, and the hydrophobic layer (2) is in a mesh structure.

2. The microphone waterproof structure according to claim 1, characterized in that: The hydrophobic layer (2) comprises a plurality of substrates, each of which is provided with the protrusions at intervals, and the plurality of substrates form the hydrophobic layer (2) with a mesh structure.

3. The microphone waterproof structure according to claim 2, characterized in that: The substrate is a stainless steel wire, and a plurality of the stainless steel wires are woven to form the hydrophobic layer (2).

4. The microphone waterproof structure according to claim 1, characterized in that: The pore size of the hydrophobic layer (2) is 20 μm to 30 μm.

5. The microphone waterproof structure according to claim 1, characterized in that: The height of the protrusion is 10 nm to 50 nm.

6. The microphone waterproof structure according to claim 1, characterized in that: The protrusion is cone-shaped.

7. The microphone waterproof structure according to claim 1, characterized in that: The contact angle between the surface of the hydrophobic layer (2) facing away from the waterproof layer (1) and the liquid drop is greater than or equal to 150°.

8. The microphone waterproof structure according to claim 1, characterized in that: The waterproof layer (1) is made of fluorine-free material.

9. A microphone, characterized in that: It comprises the microphone waterproof structure as claimed in any one of claims 1 to 8.

10. The microphone according to claim 9, characterized in that The invention comprises a PCB board (3), wherein the PCB board (3) is provided with a sound pickup hole (31), the waterproof layer (1) is arranged in the sound pickup hole (31), and the hydrophobic layer (2) is arranged on the outer surface of the PCB board (3) and covers the sound pickup hole (31).

11. The microphone according to claim 10, characterized in that It also comprises a protective layer (4), which is arranged on the outer surface of the PCB board (3) and is located on the periphery of the hydrophobic layer (2).

12. An electronic device, characterized in that: Comprising a microphone as claimed in any one of claims 9 to 11.

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