A high-performance composite lattice structure-based earphone shell

Abstract

The present application relates to a high-performance composite lattice structure elastomer earphone shell, which comprises a shell body, the shell body comprises a lattice array structure elastomer and an elastic resin layer, the lattice array structure elastomer is a thermoplastic elastomer formed by 3D printing, the porosity of the thermoplastic elastomer is 15%-35%, and the density of the thermoplastic elastomer is 0.7-1.1 g / cm3, and the elastic resin layer is formed in at least the internal pores of the lattice array structure elastomer and is combined with the lattice array structure elastomer. The present application infiltrates the elastic resin into the internal pores of the lattice array structure elastomer and tightly combines the two to form the shell body, not only satisfies the light weight, thin thickness, but also greatly enhances the strength, elasticity and compression resistance of the shell body, greatly improves the comfort of the earphone, improves the sound insulation, noise reduction, load bearing, ventilation and other functions, in addition, fits the ear canal, reduces the damage of the earphone to the ear canal for a long time.

Description

Technical Field

[0001] This invention belongs to the field of electronic accessories, specifically relating to an earphone shell based on a high-performance composite lattice elastomer. Background Technology

[0002] As is well known, headphones consist of an earphone shell, a speaker, and a signal processor. The signal processor communicates with electronic products (mobile phones, computers, tablets, radios, etc.) via wired or wireless means, and transmits the received electrical signals to the speaker, which then outputs sound waves through vibration. In other words, headphones are a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers placed close to the ears.

[0003] However, most existing earphone shells are made of hard materials, which can easily cause ear canal discomfort after prolonged use, seriously affecting the user's experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved headphone shell based on a high-performance composite lattice elastomer.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a headphone shell based on a high-performance composite lattice structure elastomer, comprising a shell body, the shell body comprising a lattice structure elastomer and an elastic resin layer, the lattice structure elastomer being a 3D-printed thermoplastic elastomer with a porosity of 15% to 35% and a density of 0.7-1.1 g / cm3, and the elastic resin layer being formed at least in the internal pores of the lattice structure elastomer and bonded to the lattice structure elastomer.

[0006] Preferably, an elastic resin layer is also formed on the surface of the thermoplastic elastomer. This further enhances the strength, elasticity, and impact resistance of the shell body without increasing the overall thickness.

[0007] Preferably, the elastic resin constituting the elastic resin layer has a hardness of 50A Shore A or higher and 40D Shore A or lower, a viscosity of less than 12000 cP at 25°C, a tensile strength of 5MPa or higher, and an elongation at break of 120% or higher.

[0008] Preferably, the mass of the elastic resin layer is 10% to 30% of the mass of the thermoplastic elastomer. This optimizes weight reduction while improving the strength, elasticity, and impact resistance of the shell body and ensuring sufficient elastic cushioning capacity.

[0009] According to a specific embodiment and preferred aspect of the present invention, the thermoplastic elastomer includes an inner plug portion and an outer plug portion, wherein the inner plug portion is inserted into the external auditory canal, and the outer plug portion and the inner plug portion form a receiving cavity, with a portion of the outer plug portion conforming to the auricle and another portion protruding outside the ear. The resulting shell body not only provides sound insulation, noise reduction, load-bearing capacity, and breathability, giving users a unique experience, but also greatly improves in-ear comfort and conforms to the ear canal, reducing the damage to the ear canal caused by prolonged earphone use.

[0010] Preferably, the outer plug portion and the inner plug portion are integrally formed, and the pressure required for the inner plug portion to be compressed to 50% of its deformation is N1, and the pressure required for the outer plug portion to be compressed to 50% of its deformation is N2, wherein N2 ≥ N1 ≥ 150 N. This indicates that the inner plug portion is more flexible than the outer plug portion.

[0011] Preferably, the porosity of the inner plug portion is greater than that of the outer plug portion. In this way, through contact at different positions and the provision of different compression deformations, in-ear comfort is ensured, and functions such as sound insulation, noise reduction, load-bearing capacity, and breathability are improved.

[0012] According to another specific embodiment and preferred aspect of the present invention, the inner plug portion includes a first plug body and a second plug body, wherein the first plug body is capable of being inserted into the external auditory canal, and the second plug body includes a fitting portion that conforms to the auricle and an exposed portion that forms a receiving space with the fitting portion.

[0013] Preferably, the pressure required for the first plug, the fitting portion, and the exposed portion to be compressed to 50% of their respective deformations is set to increase sequentially.

[0014] Preferably, the outer plug portion extends downward from the exposed portion and is closed at the lower end, wherein a hollow lattice structure is formed on the circumferential surface and / or the lower end surface of the outer plug portion.

[0015] According to another specific embodiment and preferred aspect of the present invention, the shell body is formed by coating the lattice structure elastomer with a treatment liquid containing the elastic resin or its raw materials and a curing agent.

[0016] Preferably, the coating process is carried out by spraying, dipping, or electroplating, and during the coating process, the treatment liquid is allowed to penetrate into the internal pores of the lattice structure elastomer.

[0017] In some specific embodiments, the coating treatment time is 5-20 minutes, and the heat treatment time is 3-12 hours.

[0018] Further, the mass concentration of the elastic resin in the treatment solution is 30-60%, and the mass concentration of the curing agent is 1%-10%. In some specific embodiments, the mass concentration of the elastic resin in the treatment solution is 40-55%, and the mass concentration of the curing agent is 2%-5%.

[0019] In some specific embodiments, the heat curing is carried out at a temperature of 80 to 100°C, and the coating treatment and heat curing are performed once, or repeated 1 to 3 times after one treatment.

[0020] In addition, the resin constituting the thermoplastic elastomer is selected from one or a combination of two of thermoplastic polyurethane resin and thermoplastic polyethylene resin.

[0021] In some embodiments of the present invention, the elastic resin constituting the elastic resin layer is one or more selected from polyurethane resin, acrylic resin, and silicone resin.

[0022] Through research, the inventors discovered that by fully contacting a lattice-structured elastomer with a treatment liquid containing elastic resin or raw materials that form elastic resin and a resin curing agent, and then heating and curing it, the elastic resin forms an elastic resin layer in the internal pores and on the outer surface of the lattice-structured elastomer. The elastic resin cures, bonds, and composites with the lattice-structured elastomer, filling the internal pores and thus obtaining a shell body with excellent mechanical properties. At the same weight, this shell body exhibits higher compressive strength; and under the same compressive strength conditions, the material has a lower weight. Furthermore, the elastic resin layer on the outer surface of the lattice-structured elastomer reduces the surface roughness of the material, resulting in a smooth shell body surface.

[0023] Lattice-structured elastomers are fabricated using 3D printing. By adjusting parameters such as 3D printing temperature and laser energy, the sintering density and porosity of the lattice-structured elastomer can be controlled, thereby controlling the depth and quality of elastic resin penetration. Lower temperatures and laser power result in higher porosity of the printed lattice-structured elastomer, a higher content of elastic resin in the shell, and better compressive strength of the shell.

[0024] In some specific implementations, the following parameters are used: temperature 80-140℃, laser power 30-100W, scanning rate 4000-15000mm / s, and scanning spacing 0.1-0.3mm.

[0025] Meanwhile, there are no particular restrictions on the lattice cell structure that constitutes the lattice structure elastomer. The lattice cell structure can be common cubes, stars, octagons, hexagons, rhombuses, and tetrahedrons, etc.

[0026] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0027] This invention infuses elastic resin into the internal pores of a lattice structure elastomer and tightly bonds the two together to form a shell body. This not only satisfies the requirements of light weight and thinness, but also significantly enhances the strength, elasticity, and compression resistance of the shell body. It also greatly improves the comfort of in-ear use, and improves functions such as sound insulation, noise reduction, load bearing, and breathability. In addition, it fits the ear canal, reducing the damage to the ear canal caused by prolonged earphone use. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the earphone shell structure in Example 1;

[0029] Figure 2 This is a schematic diagram of the earphone shell structure in Example 2;

[0030] Figure 3 This is a schematic diagram of the earphone shell structure in Example 3;

[0031] Figure 4 This is a schematic diagram of the earphone shell structure in Example 4;

[0032] Wherein: 1, shell body; 10, lattice structure elastomer; 100, inner plug portion; a1, first plug body; a2, second plug body; a21, fitting portion; a22, exposed portion; 101, outer plug portion. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0038] Example 1

[0039] like Figure 1 As shown, the headphone shell based on a high-performance composite lattice elastomer involved in this embodiment includes a shell body 1.

[0040] The shell body 1 includes a lattice structure elastomer 10 and an elastic resin layer. The lattice structure elastomer 10 is made of thermoplastic polyurethane (TPU) and is 3D printed by powder sintering. The process parameters are: main temperature 100-120℃, laser power 50W, scanning rate 4000-8000mm / s, and scanning spacing 0.2mm.

[0041] An elastic resin layer is formed in the internal pores of the lattice structure elastomer 10 and is bonded to the lattice structure elastomer 10.

[0042] The lattice structure elastomer 10 is a thermoplastic elastomer 3D printed with a porosity of 15% to 35% and a density of 0.7-1.1 g / cm3.

[0043] The elastic resin that makes up the elastic resin layer has a hardness of 50A Shore A or higher and 40D Shore A or lower, a viscosity of less than 12000 cP at 25°C, a tensile strength of 5MPa or higher, and an elongation at break of 120% or higher.

[0044] The mass of the elastic resin layer is 10% to 30% of the mass of the thermoplastic elastomer. This optimizes weight reduction while improving the strength, elasticity, and impact resistance of the shell body and ensuring sufficient elastic cushioning capacity.

[0045] The lattice structure elastomer 10 includes an inner plug portion 100 and an outer plug portion 101. The inner plug portion 100 is inserted into the ear canal, and the outer plug portion 101 and the inner plug portion 100 form a receiving cavity. A portion of the outer plug portion 101 conforms to the auricle, while the other portion protrudes outside the ear. The shell body formed in this way not only provides sound insulation, noise reduction, load-bearing capacity, and breathability, giving users a different experience, but also greatly improves the comfort of in-ear use. At the same time, it conforms to the ear canal, reducing the damage to the ear canal caused by prolonged earphone use.

[0046] The inner plug portion 100 includes a first plug body a1 and a second plug body a2, wherein the first plug body a1 can be inserted into the external auditory canal, and the second plug body a2 includes a fitting portion a21 that fits against the auricle and an exposed portion a22 that forms a receiving space with the fitting portion a21.

[0047] The pressure required for the first plug a1, the fitting part a21, and the exposed part a22 to be compressed to 50% is set to increase sequentially.

[0048] The outer plug portion 101 extends downward from the exposed portion a22 and is closed at the lower end. A hollow lattice structure is formed on the circumferential surface and / or the lower end surface of the outer plug portion 101.

[0049] The outer plug portion 101 and the inner plug portion 100 are integrally formed. The pressure required for the inner plug portion 100 to be compressed to 50% of its deformation is N1, and the pressure required for the outer plug portion 101 to be compressed to 50% of its deformation is N2, where N2 ≥ N1 ≥ 150 N. This indicates that the inner plug portion is more flexible than the outer plug portion.

[0050] The porosity of the inner plug portion 100 is greater than that of the outer plug portion 101. In this way, through contact at different positions and the different compression deformations provided, in-ear comfort is ensured, and functions such as sound insulation, noise reduction, load-bearing capacity, and breathability are improved.

[0051] In addition, the shell body 1 is formed by coating the lattice structure elastomer with a treatment liquid containing the elastic resin or its raw materials and a curing agent.

[0052] The coating process involves spraying, dipping, or electroplating. During the coating process, the treatment solution is allowed to penetrate into the internal pores of the lattice structure elastomer.

[0053] Meanwhile, in this example, the shell body 1 includes a lattice structure elastomer and an elastic resin layer, and the molding process includes the following steps:

[0054] 1) Using thermoplastic polyurethane (TPU) as raw material, a lattice structure elastomer is 3D printed by powder sintering. The process parameters are: main temperature 100-120℃, laser power 50W, scanning rate 4000-8000mm / s, and scanning interval 0.2min.

[0055] 2) Mix 94 parts by weight of a commercially available 45% polyurethane resin solution and 6 parts by weight of an isocyanate curing agent with a high-speed stirrer to obtain an impregnation treatment solution. The polyurethane resin has a hardness of 60A, a viscosity of 8000cP at 25℃, a tensile strength of 10MPa, and an elongation at break of 200%.

[0056] 3) Immerse the printed lattice structure elastomer in the impregnation solution prepared in step 2) for 8 minutes, remove it and spin dry, then place it in a vacuum oven at 80±2℃ for 2.5 hours to cure, and obtain the composite material sample.

[0057] The sintering density and porosity of the lattice structure elastomers obtained at different scanning rates, as well as the weight of the lattice structure elastomers before and after polyurethane resin treatment, and the pressure at 50% compression deformation are shown in Table 1 below:

[0058] Table 1

[0059]

[0060] As shown in Table 1 above, by controlling the process parameters of 3D printing, the sintering density and porosity of the lattice structure elastomer can be adjusted. The greater the porosity, the more polyurethane resin content in the shell body, and the greater the improvement in the compressive strength of the composite elastomer material.

[0061] Example 2

[0062] like Figure 2 As shown, the headphone shell based on a high-performance composite lattice elastomer involved in this embodiment includes a shell body 1, and the structure of the shell body 1 is basically the same as that in Embodiment 1, except that...

[0063] The lattice cell structures of the lattice structure elastomers 10 are different.

[0064] Meanwhile, in this example, the molding process of the lattice structure elastomer 10 and the elastic resin layer includes the following steps:

[0065] 1) Using thermoplastic polyurethane (TPU) as raw material, a lattice structure elastomer is 3D printed by powder sintering. The process parameters are: main temperature 100-120℃, laser power 55W, scanning rate 4000mm / s, and scanning spacing 0.3mm.

[0066] 2) Mix 98 parts by weight of a commercially available acrylic resin solution with a mass concentration of approximately 55% and 2 parts by weight of curing agent 4,4→-methylenebis(2-methylcyclohexylamine) evenly with a high-speed stirrer to obtain an impregnation treatment solution. The acrylic resin has a hardness of 70A, a viscosity of 10000cP at 25℃, a tensile strength of 12MPa, and an elongation at break of 180%.

[0067] 3) Immerse the printed TPU lattice structure elastomer in the impregnation solution for 10 minutes, remove it and spin dry, then place it in an 80℃ vacuum oven for 5 hours to cure and obtain the shell body sample.

[0068] 4) Place the cured sample in the impregnation solution again, soak for 10 minutes, spin dry, and cure. An elastic resin layer is formed on the surface of the lattice structure elastomer in the shell body 1.

[0069] At this point, the weight of shell body 1 was increased from 0.61g to 0.86g, and the pressure at 50% material compression deformation increased from 135.2N to 215.4N. The density of the prepared shell body was 0.981g / cm³. 3 .

[0070] Example 3

[0071] Combination Figure 3 As shown, the headphone shell based on a high-performance composite lattice elastomer involved in this embodiment includes a shell body 1, and the structure of the shell body 1 is basically the same as that in embodiment 2, except that...

[0072] The lattice cell structures of the lattice structure elastomers 10 are different.

[0073] Meanwhile, in this example, the molding process of the lattice structure elastomer 10 and the elastic resin layer includes the following steps:

[0074] 1) Using thermoplastic polyurethane (TPU) as raw material, a lattice structure elastomer is 3D printed by powder sintering. The process parameters are: main temperature 100-120℃, laser power 80W, scanning rate 4000mm / s, and scanning spacing 0.2mm.

[0075] 2) Mix 98 parts by weight of a commercially available acrylic resin solution with a mass concentration of approximately 55% and 2 parts by weight of curing agent 4,4′-methylenebis(2-methylcyclohexylamine) evenly with a high-speed stirrer to obtain an impregnation treatment solution. The acrylic resin has a hardness of 70A, a viscosity of 10000cP at 25°C, a tensile strength of 12MPa, and an elongation at break of 180%.

[0076] 3) Immerse the printed TPU lattice structure elastomer in the impregnation solution for 10 minutes, remove it and spin dry, then place it in an 80℃ vacuum oven for 5 hours to cure and obtain the shell body sample.

[0077] 4) The cured sample was placed in the impregnation solution twice, soaked for 10 minutes, spun dry, and cured to obtain a composite elastomer material sample of two layers of polyurethane resin.

[0078] At this point, the weight of shell body 1 was increased from 0.61g to 0.96g, and the pressure at 50% material compression deformation increased from 135.2N to 235.2N. The density of the prepared shell body was 0.997g / cm³. 3 .

[0079] Example 4

[0080] Combination Figure 4 As shown, the cushion involved in this embodiment has a structure that is basically the same as that in embodiment 1. The differences are as follows.

[0081] The lattice cell structures of the lattice structure elastomers 10 are different.

[0082] Meanwhile, in this example, the molding process of the lattice structure elastomer 10 and the elastic resin layer includes the following steps:

[0083] 1) Using thermoplastic polyurethane (TPU) as raw material, a lattice structure elastomer is 3D printed by powder sintering. The process parameters are: main temperature 100-120℃, laser power 50W, scanning rate 4000-8000mm / s, and scanning spacing 0.2mm.

[0084] 2) Mix 94 parts by weight of a commercially available 45% polyurethane resin solution and 6 parts by weight of an isocyanate curing agent with a high-speed stirrer to obtain an impregnation treatment solution. The polyurethane resin has a hardness of 60A, a viscosity of 8000cP at 25℃, a tensile strength of 10MPa, and an elongation at break of 200%.

[0085] 3) Immerse the printed lattice structure elastomer in the impregnation solution prepared in step 2) for 8 minutes, remove it and spin dry, then place it in a vacuum oven at 80±2℃ for 2.5 hours to cure, and obtain the composite material sample.

[0086] 4) The cured sample was placed in the impregnation solution three times, soaked for 10 minutes, spun dry, and cured to obtain a composite elastomer material sample of three layers of polyurethane resin.

[0087] At this point, the weight of shell body 1 was increased from 0.61g to 1.11g, and the pressure at 50% material compression deformation increased from 135.2N to 269.9N. The density of the prepared shell body was 1.091g / cm³. 3 .

[0088] Therefore, the present invention has the following advantages:

[0089] 1. This application combines a lattice-structured elastomer with an elastic resin coating, allowing the elastic resin to penetrate into the internal pores of the lattice-structured elastomer and achieve a tight bond between the two. Unexpectedly, without affecting the superior properties of the lattice-structured elastomer, the compressive strength of the material is significantly improved, while the material volume remains unchanged and the weight increases only slightly. Compared to a lattice-structured elastomer without an elastic resin coating, the shell body of this invention is significantly smaller and lighter in weight while achieving the same compressive strength; and at the same weight, the shell body of this application exhibits significantly higher compressive strength.

[0090] 2. The shell body fabrication process of this application employs 3D printing to prepare a lattice structure elastomer, followed by coating and curing processes. On one hand, by adjusting parameters such as 3D printing temperature and laser power, the sintering density and porosity of the lattice structure elastomer can be controlled, thereby controlling the depth and quality of elastic resin penetration, and ultimately controlling the degree of improvement in the shell body's compressibility. Therefore, shell bodies with various properties can be flexibly prepared to meet the personalized needs of various application scenarios. On the other hand, the coating and curing processes ensure a more thorough and tighter bond between the lattice structure elastomer and the elastic resin coating, contributing to improved shell body strength and service life.

[0091] 3. Not only does it meet the requirements of being lightweight and thin, but it also significantly enhances the strength, elasticity, and compression resistance of the shell, greatly improving the comfort of in-ear use and enhancing functions such as sound insulation, noise reduction, load-bearing capacity, and breathability. In addition, it fits the ear canal, reducing the damage to the ear canal caused by prolonged earphone use.

[0092] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

Claims

1. A headphone shell based on a high-performance composite lattice elastomer, comprising a shell body, characterized in that: The shell body comprises a lattice structure elastomer and an elastic resin layer. The lattice structure elastomer is a 3D-printed thermoplastic elastomer with a porosity of 15%–35% and a density of 0.7–1.1 g / cm³. 3 The elastic resin layer is formed at least in the internal pores of the lattice structure elastomer and is bonded to the lattice structure elastomer; the mass of the elastic resin layer is 10% to 30% of the mass of the thermoplastic elastomer; the shell body is formed by coating the lattice structure elastomer with a treatment liquid containing elastic resin or its raw materials and curing agent.

2. The headphone shell based on a high-performance composite lattice elastomer according to claim 1, characterized in that: The elastic resin layer is also formed on the surface of the thermoplastic elastomer.

3. The headphone shell based on a high-performance composite lattice elastomer according to claim 1, characterized in that: The elastic resin constituting the elastic resin layer has a hardness of 50A Shore A or higher and 40D Shore A or lower, a viscosity of less than 12000 cP at 25°C, a tensile strength of 5MPa or higher, and an elongation at break of 120% or higher.

4. The headphone shell based on a high-performance composite lattice elastomer according to any one of claims 1 to 3, characterized in that: The thermoplastic elastomer includes an inner plug portion and an outer plug portion, wherein the inner plug portion is inserted into the external auditory canal, the outer plug portion and the inner plug portion form a receiving cavity, and a portion of the outer plug portion conforms to the auricle, while the other portion protrudes outside the ear.

5. The headphone shell based on a high-performance composite lattice elastomer according to claim 4, characterized in that: The outer plug portion is integrally formed with the inner plug portion, and the pressure required for the inner plug portion to be compressed to 50% of its deformation is N1.

6. The headphone shell based on a high-performance composite lattice elastomer according to claim 4, characterized in that: The pressure required for the outer plug portion to be compressed to 50% of its deformation is N2, where N2 ≥ N1 ≥ 150 N.

7. The headphone shell based on a high-performance composite lattice elastomer according to claim 4, characterized in that: The porosity of the inner plug portion is greater than that of the outer plug portion.

8. The headphone shell based on a high-performance composite lattice elastomer according to claim 4, characterized in that: The inner plug portion includes a first plug body and a second plug body, wherein the first plug body can be inserted into the external auditory canal, and the second plug body includes a fitting portion that fits onto the auricle and an exposed portion that forms a receiving space with the fitting portion.

9. The headphone shell based on a high-performance composite lattice elastomer according to claim 8, characterized in that: The pressure required for the first plug, the fitting portion, and the exposed portion to be compressed to 50% of their respective deformations is set to increase sequentially.

10. The headphone shell based on a high-performance composite lattice elastomer according to claim 8, characterized in that: The outer plug portion extends downward from the exposed portion and is closed at the lower end, wherein a hollow lattice structure is formed on the circumferential surface and / or the lower end surface of the outer plug portion.

11. The headphone shell based on a high-performance composite lattice elastomer according to claim 1, characterized in that: The coating process is carried out by spraying, dipping, or electroplating. During the coating process, the treatment liquid is allowed to penetrate into the internal pores of the lattice structure elastomer.

12. The headphone shell based on a high-performance composite lattice elastomer according to claim 1 or 11, characterized in that: The mass concentration of elastic resin in the treatment liquid is 30-60%, and the mass concentration of curing agent is 1%-10%. The heat curing is carried out at a temperature of 80-100℃. The coating treatment and heat curing are performed once, or after one treatment, they are repeated 1-3 times.

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