Housing of sound-generating device, sound-generating device and electronic device

Abstract

The present invention discloses a shell of a sound-generating device, a sound-generating device and an electronic device. At least a part of the shell is a first supporting shell, the first supporting shell includes a metal frame and an organic aerogel material, the metal frame is a porous skeleton with a pore structure, and the organic aerogel material is distributed on the surface of the metal frame and in the pore structure. The shell of the sound-generating device provided by the present invention is lighter in weight and has a higher modulus, which can not only meet the design requirements of lightweight and miniaturized sound-generating devices, but also improve the stability of the shell structure, reduce the resonance peak generated by the high-frequency vibration of the sound-generating device, and improve its acoustic performance. In addition, the thermal conductivity of the shell is higher, so that the sound-generating device has better thermal conductivity and heat dissipation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and more specifically, to a housing of a sound-generating device, a sound-generating device and an electronic device. Background Art

[0002] With the rapid development of the 5G era, electroacoustic devices are developing towards being lighter, smarter, more powerful, and more high-frequency. In the speaker module, the weight, thickness, rigidity and other characteristics of the speaker shell have a certain degree of influence on the acoustic performance of the speaker.

[0003] In the prior art, the shell of the speaker is usually made of plastic materials such as polycarbonate, polyamide, polypropylene, acrylonitrile-butadiene-styrene, etc. However, the plastic shell generally has low rigidity and large shrinkage, which will lead to poor dimensional stability of the speaker shell and easily cause resonance during the speaker sounding process, thereby affecting the acoustic performance and acoustic effect of the speaker. In addition, the thermal conductivity of the plastic shell is also poor, which is not conducive to the heat dissipation of the speaker. Summary of the invention

[0004] An object of the present invention is to provide a new technical solution for a housing of a sound-generating device, a sound-generating device and an electronic device.

[0005] According to a first aspect of the present invention, a shell of a sound-emitting device is provided, wherein at least a portion of the shell is a first supporting shell, the first supporting shell comprises a metal frame and an organic aerogel material, the metal frame is a porous skeleton having a pore structure, and the organic aerogel material is distributed on the surface of the metal frame and in the pore structure.

[0006] Optionally, a dimension of the metal frame along a thickness direction of the first supporting shell is 0.1 mm to 3 mm.

[0007] Optionally, the surface density of the metal frame is 0.4 kg / m 2 ~1.5kg / m 2 ;

[0008] And / or, the pore size of the pore structure is 80 μm to 400 μm.

[0009] Optionally, the metal frame is a metal woven mesh or a metal hollow mesh; or,

[0010] The metal frame is made of metal fiber porous material or open-pore metal foam material.

[0011] Optionally, the bending modulus of the first supporting shell is 1 GPa to 10 GPa;

[0012] And / or, the bending strength of the first supporting shell is 30 MPa to 100 MPa.

[0013] Optionally, the density of the first supporting shell is 0.3 g / cm 3 ~1.2g / cm 3 .

[0014] Optionally, the thickness of the first supporting shell is 0.2 mm to 3 mm.

[0015] Optionally, the shrinkage rate of the first supporting shell is 5% to 10%.

[0016] Optionally, the impact strength of the first support shell is 9 kJ / m 2 ~80kJ / m 2 .

[0017] Optionally, the thermal conductivity of the first supporting shell is greater than or equal to 1 W / m*K.

[0018] Optionally, the mass of the organic aerogel material accounts for 30% to 70% of the total mass of the first supporting shell.

[0019] Optionally, the organic aerogel material is at least one of polyimide aerogel, polyamide aerogel, polyester aerogel, aldehyde aerogel, polyolefin aerogel and polysaccharide aerogel.

[0020] Optionally, the metal frame and the organic aerogel material are integrally formed by injection molding or compression molding.

[0021] Optionally, the housing further comprises: a second supporting shell, the second supporting shell being connected to the first supporting shell by integral injection molding or by gluing;

[0022] The second supporting shell is made of at least one of PC and its modified materials, PA and its modified materials, PPS and its modified materials, PP and its modified materials, ABS and its modified materials, LCP and its modified materials, PEI and its modified materials, phenolic resin and its modified materials, epoxy resin and its modified materials, unsaturated polyester and its modified materials, stainless steel and aluminum alloy, magnesium alloy, and metal-based composite materials.

[0023] According to a second aspect of the present invention, there is further provided a sound-generating device, comprising: a sound-generating unit and a housing of the sound-generating device according to the first aspect, wherein the sound-generating unit is located in the housing.

[0024] According to a third aspect of the present invention, there is also provided an electronic device, comprising: the sound-generating device described in the second aspect.

[0025] According to one embodiment of the present invention, a technical effect of the present invention is:

[0026] The present invention adopts a metal frame combined with an organic aerogel material as at least a part of the shell of the sound-generating device, and the metal frame is a porous skeleton with a pore structure, and the organic aerogel material is distributed on the surface of the metal frame and in the pore structure.

[0027] In the above-mentioned shell structure, the interior of the organic aerogel material has an interlaced porous network structure, which makes the shell of the sound-generating device lighter, and the metal frame serves as the supporting skeleton of the shell, which not only improves the rigidity of the shell, but also limits the shrinkage of the organic aerogel material and improves the dimensional stability of the shell.

[0028] When the housing is applied to a sound-generating device, the sound-generating device can achieve the design requirements of being thinner and smaller, and can also meet the requirements of its acoustic stability performance. In addition, the metal frame has good thermal conductivity, which improves the heat dissipation performance of the sound-generating device.

[0029] 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

[0030] 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.

[0031] Figure 1 It is a structural schematic diagram of a sound-generating device provided by the present invention.

[0032] Figure 2 It is a schematic diagram of an organic aerogel material provided by the present invention distributed on the surface and in the pore structure of a metal hollow mesh.

[0033] Figure 3 It is a schematic diagram of an organic aerogel material provided by the present invention distributed on the surface and in the pore structure of a metal woven mesh.

[0034] Figure 4 It is a schematic diagram of an organic aerogel material provided by the present invention distributed on the surface and in the pore structure of a porous metal material.

[0035] Figure 5 It is a THD curve diagram when the housings in Example 1 and Comparative Example 1 provided by the present invention are applied to a sound-generating device.

[0036] Description of reference numerals:

[0037] 10. Shell; 11. First supporting shell; 12. Second supporting shell; 111. Porous metal material; 112. Metal woven mesh; 113. Metal hollow mesh; 114. Organic aerogel material; 20. Sound-emitting monomer. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] 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.

[0043] like Figures 1 to 5 As shown, according to a first aspect of the present invention, the present invention provides a shell 10 of a sound-emitting device, at least a portion of the shell 10 is a first supporting shell 11, the first supporting shell 11 includes a metal frame and an organic aerogel material 114, the metal frame is a porous skeleton with a pore structure, and the organic aerogel material 114 is distributed on the surface of the metal frame and in the pore structure.

[0044] Specifically, the shell 10 of the sound-generating device has a certain protective effect on the sound-generating device, and also has a certain influence on the acoustic performance of the sound-generating device. In this embodiment, at least a portion of the shell 10 of the sound-generating device, that is, the first supporting shell 11 is made of a metal frame and an organic aerogel material 114 distributed on the surface of the metal frame and in the internal pore structure.

[0045] refer to Figures 2 to 4In the above structure, the organic aerogel material 114 is distributed on the surface of the metal frame and in the pore structure, that is, the organic aerogel material 114 can be filled in the pore structure and coated on the outer wall and inner wall (wall of the pore structure) of the metal frame. The metal frame is a skeleton with a porous structure made of metal material. The porous structure can be formed by a processing technology, such as a metal woven mesh 112 or a metal hollow mesh 113; or it can be prepared by selecting a material with a pore structure, such as a metal fiber porous material or an open-pore metal foam material. The organic aerogel material 114 is a material prepared by an organic polymer material, such as polyimide aerogel, polyamide aerogel, polyester aerogel, aldehyde aerogel, polyolefin aerogel and polysaccharide aerogel. In practical applications, the type of metal frame and the type of organic aerogel can be selected according to actual needs, and the present invention does not limit this.

[0046] The shell 10 of the sound-generating device prepared by using the above structure has an interlaced porous network structure inside the organic aerogel material 114, so that the shell 10 of the prepared sound-generating device is light in weight. The metal frame, as the supporting skeleton of the shell 10, not only improves the rigidity of the shell 10, but also can limit the shrinkage of the organic aerogel material 114, so that the shrinkage rate of the organic aerogel is reduced, and the dimensional stability of the shell 10 is improved. When the prepared shell 10 is applied to the sound-generating device, the combination of the organic aerogel material 114 and the metal frame can, on the one hand, realize the design requirements of the light and small size of the sound-generating device, and on the other hand, the dimensional stability of the shell 10 is good, which can avoid the resonance of the sound-generating device during the sound-generating process, thereby meeting the acoustic stability requirements of the sound-generating device.

[0047] In addition, since the metal frame is made of metal material, it has a high thermal conductivity coefficient and a high specific surface area, can quickly exchange heat with gas and liquid, can conduct heat through the movement of a large number of free electrons, has a high thermal conductivity, and plays an effective role in heat conduction and heat dissipation, further improving the heat dissipation performance of the sound-generating device. Furthermore, the first supporting shell 11 prepared by the organic aerogel contains a certain hydrophobic group, and the surface pore size is small, with a hydrophobic angle of less than 80°, so that the prepared shell 10 has good hydrophobicity, can be used in high humidity environments, and will not collapse.

[0048] It is understandable that the present invention reduces the shrinkage rate of the first supporting shell 11 finally prepared to 5% to 10% by combining the metal frame with the organic aerogel material 114, effectively suppresses the shrinkage rate of the organic aerogel, and greatly improves the structural stability of the shell 10. Among them, the shrinkage rate of the first shell can be adjusted by adjusting the mass proportion of the organic aerogel in the first supporting shell 11. If the proportion of the organic aerogel in the first supporting shell 11 is too high, the shrinkage rate of the prepared first shell will also be high, affecting the structural stability of the first supporting shell 11 during molding. If the proportion of the organic aerogel is too low, the proportion of the metal frame will be higher, which will easily lead to an increase in the mass of the shell 10.

[0049] In the present invention, the mass proportion of the organic aerogel in the first supporting shell 11 is 30% to 70%, for example, 30%, 40%, 50%, 60%, 70%, etc., which can take into account both the structural stability and lightweight requirements of the outer shell 10, so that the shrinkage rate of the first supporting shell 11 can be maintained at 5% to 10%.

[0050] Optionally, a dimension of the metal frame along the thickness direction of the first supporting shell 11 is 0.1 mm to 3 mm.

[0051] Specifically, the size of the metal frame in the thickness direction of the first supporting shell 11 will affect the thickness of the finally prepared shell 10. If the thickness of the metal frame is too thick, the overall mass of the shell 10 will become heavier, which is not conducive to the lightweight and miniaturized design requirements of the sound-generating device. If the thickness of the metal frame is too thin, it cannot meet the structural strength requirements of the shell 10, resulting in insufficient rigidity of the shell 10 and failure to achieve the purpose of protecting the sound-generating device. In addition, the effect of reducing the shrinkage rate of the organic aerogel due to the thin thickness is limited, which makes the structural stability of the shell 10 lower. In this embodiment, the thickness of the metal frame is 0.1mm to 3mm, such as 0.1mm, 0.2mm, 0.5mm, 0.7mm, 0.9mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.5mm, 3mm, etc. The metal frame with a thickness within this range can take into account both the strength requirements and the lightweight requirements of the shell 10.

[0052] Optionally, the surface density of the metal frame is 0.4 kg / m 2 ~1.5kg / m 2 ; and / or, the pore size of the pore structure is 80μm to 400μm.

[0053] Specifically, the aperture of the pore structure on the metal frame is inversely proportional to the surface density of the metal frame, that is, the larger the aperture of the pore structure, the smaller the surface density. If the aperture of the pore structure is too large, that is, the smaller the surface density of the metal frame, the metal frame will not have a good effect on reinforcing the rigidity of the outer shell 10 on the one hand, and on the other hand, it will not be obvious to suppress the shrinkage of the aerogel, which will easily lead to the deterioration of the structural stability of the outer shell 10. When the aperture of the pore structure is too small, that is, the surface density of the metal frame is too large, the metal frame will account for a large proportion of the total mass of the outer shell 10, and in actual production, it will be difficult for the organic aerogel to enter the pore structure, resulting in poor bonding between the metal frame and the organic aerogel material 114, which is not conducive to the design requirements of lightweight and miniaturized sound-generating devices.

[0054] In this embodiment, the surface density of the metal frame is 0.4 kg / m 2 ~1.5kg / m 2 , for example 0.4kg / m 2 , 0.5kg / m 2 , 0.8kg / m 2 , 0.9kg / m 2 , 1kg / m 2 , 1.2kg / m 2 , 1.5kg / m 2 etc.; or the pore size of the pore structure is 80μm to 400μm, for example, 10μm, 85μm, 90μm, 95μm, 100μm, 150μm, 180μm, 200μm, 250μm, 300μm, 360μm, 400μm, etc. At this time, the metal frame has good bonding with the organic aerogel, and the metal frame has excellent reinforcement effect on the rigidity of the outer shell 10, which can meet the requirements of the acoustic performance and structural performance of the sound-emitting device at the same time.

[0055] Optionally, the metal frame is a metal woven mesh 112 or a metal hollow mesh 113; or, the metal frame is made of a metal fiber porous material or an open-pore metal foam material.

[0056] Specifically, the metal frame can be a porous skeleton with a pore structure formed by a processing technology, or a porous skeleton prepared by a porous metal material 111 having a pore structure. Figure 2 and Figure 3 , such as metal woven mesh 112 and metal hollow mesh 113, which have high process maturity and low processing cost and can be used for mass production. Metal materials with pore structures such as metal fibers or open-pore metal foams, etc., refer to Figure 4 , which can be applied to sound-generating devices with precision requirements. The specific selection can be made according to actual product needs and processing requirements, and the present invention does not impose any limitation on this.

[0057] Optionally, the bending modulus of the first supporting shell 11 is 1 GPa to 10 GPa; and / or the bending strength of the first supporting shell 11 is 30 MPa to 100 MPa.

[0058] Specifically, the bending modulus or bending strength can characterize the structural stability of the first support shell 11. When the bending modulus or bending strength is too large, the first support shell 11 will have too much anti-bending deformation margin, which will increase the cost. When the bending modulus or bending strength is too small, the rigidity of the first support shell 11 cannot meet the design requirements of the sound device housing 10, resulting in poor structural stability. In this embodiment, in order to take into account both production cost and structural stability, the bending modulus is limited to 1GPa~10GPa, for example, 1GPa, 3GPa, 5GPa, 8GPa, 10GPa, etc., or the bending strength is limited to 30MPa~100MPa, for example, 30MPa, 4MPa, 50MPa, 60MPa, 80MPa, 100MPa, etc. Preferably, the bending modulus and the bending strength can be limited to the above range at the same time.

[0059] In one embodiment, the bending modulus of the first support shell 11 can be adjusted by adjusting the bending modulus of the metal frame, for example, by setting the bending modulus of the metal frame to 50 GPa to 200 GPa, for example, 50 GPa, 60 GPa, 80 GPa, 100 GPa, 150 GPa, 20 GPa, etc., combined with the organic aerogel material 114, the bending modulus of the first support shell 11 can be limited to 1 GPa to 10 GPa. Or the bending strength of the first support shell 11 can be adjusted by adjusting the bending strength of the metal frame, for example, by setting the bending strength of the metal frame to 80 MPa to 250 MPa, for example, 10 MPa, 90 MPa, 100 MPa, 120 MPa, 150 MPa, 180 MPa, 200 MPa, 220 MPa, 250 MPa, etc., combined with the organic aerogel material 114, the bending modulus of the first support shell 11 can be limited to 30 MPa to 100 MPa.

[0060] It should be noted that when the bending modulus or bending strength of the metal frame is limited to the above range, the mass proportion of the organic aerogel can also be taken into account to avoid the metal frame having an excessively high proportion, which affects the overall weight of the housing 10 .

[0061] Optionally, the density of the first supporting shell 11 is 0.3 g / cm 3 ~1.2g / cm 3 .

[0062] Specifically, when the density of the first supporting shell 11 is too large, the shell 10 of the same volume is likely to be too large, which is not conducive to the lightweight requirement of the sound-generating device. When the density of the first supporting shell 11 is too small, the shell 10 of the same mass is likely to be larger in volume, which is not conducive to the miniaturization requirement of the sound-generating device. In this embodiment, the organic aerogel material 114 is combined with the metal frame. The organic aerogel has a staggered porous structure, which can keep the density of the first supporting shell 11 at 0.3g / cm 3 ~1.2g / cm 3 Without increasing its mass or volume, the demand for lightweight and miniaturized sound-generating devices is met.

[0063] In some embodiments, the thickness of the first supporting shell 11 is 0.2 mm to 3 mm, for example, 0.2 mm, 0.3 mm, 0.5 mm, 0.8 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 2.5 mm, 3 mm, etc. If the thickness of the first supporting shell 11 is less than 0.2 mm, the rigidity of the housing 10 is likely to be insufficient, and if the thickness of the first supporting shell 11 is greater than 3 mm, the weight of the housing 10 is likely to be too heavy.

[0064] In some embodiments, under the test standard of ASTM D-256, the impact strength of the first support shell 11 is 9 kJ / m 2 ~80kJ / m 2 , for example 9kJ / m 2 、10kJ / m 2 、12kJ / m 2 、15kJ / m 2 、18kJ / m 2 、20kJ / m 2 、25kJ / m 2 、32kJ / m 2 、37kJ / m 2 、40kJ / m 2 、50kJ / m 2 、60kJ / m 2 、70kJ / m 2 、80kJ / m 2 When the housing 10 falls, if the impact strength of the first supporting shell 11 is less than 9 kJ / m 2 , which can easily cause the housing 10 to deform, resulting in the sound unit 20 in the sound device being impacted.

[0065] In one embodiment, the thermal conductivity of the first supporting shell 11 is greater than or equal to 1W / m*K. In actual production, a metal frame with a larger thermal conductivity can be selected as the porous skeleton of the first supporting shell 11, combined with the organic aerogel material 114, to improve the heat dissipation performance of the sound-generating device. In one embodiment, the first supporting shell 11 can be used as a shell corresponding to the front sound cavity of the sound-generating device, or as a shell corresponding to the rear sound cavity of the sound-generating device, and the design is specifically based on actual needs.

[0066] In one embodiment, the metal frame and the organic aerogel material 114 can be integrally formed by injection molding or molding to further improve the structural stability of the first manufactured shell and prevent separation of materials between the shell 10 when it is impacted or dropped, thereby extending the service life of the shell 10.

[0067] Optionally, refer to Figure 1 The shell 10 also includes: a second supporting shell 12, the second supporting shell 12 is connected to the first supporting shell 11 by integral injection molding or by adhesive bonding; the second supporting shell 12 is made of at least one of PC and its modified materials, PA and its modified materials, PPS and its modified materials, PP and its modified materials, ABS and its modified materials, LCP and its modified materials, PEI and its modified materials, phenolic resin and its modified materials, epoxy resin and its modified materials, unsaturated polyester and its modified materials, stainless steel and aluminum alloy, magnesium alloy, and metal-based composite materials.

[0068] The present invention also provides a sound-generating device, such as Figure 1 As shown, the housing 10 of the sound-generating device in any of the above embodiments is included, and the sound-generating device also includes a sound-generating unit 20 arranged in the housing 10 to perform electroacoustic conversion to achieve the sound-generating performance of the sound-generating device. Among them, at least a part of the housing 10 is made of the above-mentioned first manufactured shell, and the first manufactured shell is combined with a metal frame and an organic aerogel to improve the structural stability of the housing 10 and reduce the weight of the shell, meet the design requirements of the light and small-sized sound-generating device, and also improve the acoustic performance and heat dissipation performance of the sound-generating device. Optionally, the sound-generating device can be a speaker module.

[0069] The present invention also provides an electronic device, which includes a sound-generating device according to the above-mentioned embodiment of the present invention. The electronic device may be a mobile phone, a laptop computer, a tablet computer, a VR (virtual reality) device, an AR (augmented reality) device, a TWS (true wireless Bluetooth) headset, a smart speaker, etc., and the present invention does not limit this.

[0070] In order to make the technical scheme and corresponding technical effects of the present invention clearer, the present invention specifically provides the following embodiments and comparative examples to specifically illustrate the technical scheme.

[0071] Embodiment 1:

[0072] This embodiment provides a housing 10 of a sound-generating device made of an organic aerogel material 114 and a metal frame, wherein the organic aerogel material 114 is made of polyimide aerogel, and the metal frame is made of a metal woven mesh 112. Figure 3 , the specific preparation method is as follows:

[0073] Step 1: Take 50 g of polyamic acid salt and prepare a polyamic acid hydrogel with a mass fraction (solid content) of 15%.

[0074] Step 2: The polyamic acid wet gel prepared in the first step is heated to 60° C. and injected into the metal woven mesh 112 frame structure for molding to obtain the shell 10 structure.

[0075] Step 3: Freeze the shell 10 structure prepared in the second step at -40°C for 1 hour, dry it at a vacuum degree of <100 Pa for 2 hours, and imide it at 350°C for 2 hours to obtain a polyimide aerogel shell 10 containing a metal frame.

[0076] Comparative Example 1:

[0077] This comparative example provides a PC housing 10 made of PC material, the outer dimensions of which are consistent with those of the housing 10 in Example 1, and the specific preparation process is omitted.

[0078] The polyimide aerogel housing 10 containing a metal frame in Example 1 and the PC housing 10 in Comparative Example 1 were weighed, subjected to bending modulus testing, and thermal conductivity testing, and the results are shown in Table 1 below:

[0079] Table 1: Comparison of weight, flexural modulus and thermal conductivity of housing 10

[0080] Performance parameters Housing of Example 1 Shell of Comparative Example 1 Weight / mg 260 500 Flexural modulus / GPa 9 3.4 Thermal conductivity (W / m*K) 300 0.2

[0081] It can be seen from Table 1 that the weight of the polyimide aerogel housing 10 containing a metal frame obtained in Example 1 is reduced by 240 mg, the bending modulus is increased by 5.6 GPa, and the thermal conductivity is also higher than that of the PC housing 10 in the comparative example.

[0082] This shows that the housing 10 of the sound-generating device provided by the present invention is lighter in weight, which is conducive to the design requirements of lightweight and miniaturized sound-generating devices. The housing 10 of the sound-generating device provided by the present invention has a higher specific modulus, that is, a greater rigidity, which can improve the stability of the housing 10 structure to reduce the resonance peak generated by high-frequency vibration. In addition, the housing 10 of the sound-generating device provided by the present invention has a higher thermal conductivity, which makes the sound-generating device have better thermal conductivity and heat dissipation performance.

[0083] Furthermore, the housing 10 in Example 1 and the housing 10 in Comparative Example 1 were respectively assembled with the sound-generating monomer 20 to obtain different sound-generating devices, and acoustic tests were performed on each sound-generating device to obtain the following results: Figure 5 The THD (harmonic distortion) curve diagram, wherein the horizontal axis represents the sound frequency (Hz) of the sound generating device, and the vertical axis represents the ratio (%) of the effective value of the output signal generated by the harmonic distortion to the effective value of the total output signal at the corresponding sound generating frequency.

[0084] Depend on Figure 5 It can be seen that in the same sound frequency band, the sound-emitting device prepared by using the shell 10 of Example 1 of the present invention has a significantly smaller output signal due to harmonic distortion than the shell 10 in Comparative Example 1, indicating that when the shell 10 provided by the present invention is used in the sound-emitting device, the harmonic distortion of the sound signal is smaller, thereby improving the acoustic performance of the sound-emitting device.

[0085] It should be noted that the above embodiments focus on describing 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.

[0086] 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 housing of a sound-generating device, characterized in that: At least a portion of the shell is a first supporting shell, the first supporting shell includes a metal frame and an organic aerogel material, the metal frame is a porous skeleton with a pore structure, and the organic aerogel material is distributed on the surface of the metal frame and in the pore structure; The surface density of the metal frame is 0.4 kg / m 2 ~1.5kg / m 2 ; and the pore diameter of the pore structure is 80μm to 400μm.

2. The housing of the sound-generating device according to claim 1, characterized in that: The dimension of the metal frame along the thickness direction of the first supporting shell is 0.1 mm to 3 mm.

3. The housing of the sound-generating device according to claim 1, characterized in that: The metal frame is a metal woven mesh or a metal hollow mesh; or, The metal frame is made of metal fiber porous material or open-pore metal foam material.

4. The housing of the sound-generating device according to claim 1, characterized in that: The bending modulus of the first supporting shell is 1 GPa to 10 GPa; And / or, the bending strength of the first supporting shell is 30 MPa to 100 MPa.

5. The housing of the sound-generating device according to claim 1, characterized in that: The density of the first supporting shell is 0.3 g / cm 3 ~1.2g / cm 3 .

6. The housing of the sound-generating device according to claim 1, characterized in that: The thickness of the first supporting shell is 0.2 mm to 3 mm.

7. The housing of the sound-generating device according to claim 1, characterized in that: The shrinkage rate of the first supporting shell is 5% to 10%.

8. The housing of the sound-generating device according to claim 1, characterized in that: The impact strength of the first support shell is 9 kJ / m 2 ~80kJ / m 2 .

9. The housing of the sound-generating device according to claim 1, characterized in that: The thermal conductivity of the first supporting shell is greater than or equal to 1 W / m*K.

10. The housing of the sound-generating device according to claim 1, characterized in that: The mass of the organic aerogel material accounts for 30% to 70% of the total mass of the first supporting shell.

11. The housing of the sound-generating device according to claim 1, characterized in that: The organic aerogel material is at least one of polyimide aerogel, polyamide aerogel, polyester aerogel, aldehyde aerogel, polyolefin aerogel and polysaccharide aerogel.

12. The housing of the sound-generating device according to claim 11, characterized in that: The metal frame and the organic aerogel material are integrally formed by injection molding or compression molding.

13. The housing of the sound-generating device according to any one of claims 1 to 12, characterized in that: The housing further comprises: a second supporting shell, the second supporting shell being connected to the first supporting shell by integral injection molding or by gluing; The second supporting shell is made of at least one of PC and its modified materials, PA and its modified materials, PPS and its modified materials, PP and its modified materials, ABS and its modified materials, LCP and its modified materials, PEI and its modified materials, phenolic resin and its modified materials, epoxy resin and its modified materials, unsaturated polyester and its modified materials, stainless steel and aluminum alloy, magnesium alloy, and metal-based composite materials.

14. A sound-generating device, characterized in that: include: A sound-emitting unit and a shell of a sound-emitting device as described in any one of claims 1 to 13, wherein the sound-emitting unit is located inside the shell.

15. An electronic device, characterized in that: Includes the sound-generating device as claimed in claim 14.

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