Double-layer ear cap and earphone

Abstract

The utility model discloses a double -deck ear cap and earphone, double -deck ear cap includes connecting post, first sound insulation cap and second sound insulation cap, the upper end of connecting post is connected with the upper end of first sound insulation cap, and the middle part of connecting post is connected with the upper end of second sound insulation cap, and the lower end ring of first sound insulation cap is equipped outside the upper end of second sound insulation cap, the mounting hole of being equipped with in connecting post is passed through connecting post, and the lower end of connecting post extends outward and forms annular support protruding, and the lower end ring of second sound insulation cap is equipped outside support protruding. This double -deck ear cap after entering the ear, when the ear appears slight extrusion, second sound insulation cap can form the support to the lower end of first sound insulation cap, and support protruding can form the support to the lower end of second sound insulation cap, thereby reduced the deformation degree of sound insulation cap, greatly reduced the risk of sound leakage, guarantee sealed sound insulation, avoided this double -deck ear cap because the sound insulation cap's large amplitude deformation leads to the sound insulation effect's large amplitude reduction.

Description

Technical Field

[0001] This utility model relates to the field of audio, and in particular to a double-layer ear cap and headphones including the double-layer ear cap. Background Technology

[0002] Double ear tips are accessories for headphones or earphones, and typically include a connector for connection and two soundproof caps covering the connector.

[0003] Since the ear canal is in direct contact with the ear, it is made relatively soft to ensure comfort. This means that traditional double-layered ear canals will deform significantly when the ear is slightly compressed, such as when the user is lying on their side, resulting in a significant reduction in their sound insulation effect. Utility Model Content

[0004] Therefore, it is necessary to provide a double-layered ear cap that can solve the above problems.

[0005] In addition, it is necessary to provide an earphone that includes the aforementioned double-layered ear caps.

[0006] A double-layered ear cap includes a connecting post and a first soundproof cap and a second soundproof cap, both of which are covered outside the connecting post. The upper end of the connecting post is connected to the upper end of the first soundproof cap, the middle part of the connecting post is connected to the upper end of the second soundproof cap, the lower end of the first soundproof cap is circumferentially arranged on the outer side of the upper end of the second soundproof cap, and a first annular soundproof cavity is formed between the first soundproof cap and the second soundproof cap. The connecting post has a through mounting hole. The lower end of the connecting post extends outward to form an annular support protrusion. The projection of the lower end of the support protrusion on the axis of the double-layer ear cap is above the projection of the lower end of the second soundproof cap on the axis of the double-layer ear cap. The lower end of the second soundproof cap is circumferentially arranged on the outside of the support protrusion. A second annular soundproof cavity is formed between the second soundproof cap and the connecting post.

[0007] In one embodiment, the distance between the inner side of the lower end of the first soundproof cap and the outer side of the upper end of the second soundproof cap is 0.1mm to 0.7mm.

[0008] In one embodiment, the distance between the inner wall of the lower end of the second soundproof cap and the support protrusion is 0.2mm to 1mm.

[0009] In one embodiment, the ratio of the height of the first soundproof cap to the overall height of the double-layered ear cap is 0.46 to 0.54:1.

[0010] In one embodiment, the thickness of the first soundproof cap is 0.3mm to 2mm, the thickness of the first soundproof cap gradually decreases from the top to the bottom, and the thickness ratio of the top of the first soundproof cap, the middle of the first soundproof cap, and the bottom of the first soundproof cap is 1:0.6 to 0.75:0.56 to 0.68. The thickness of the second soundproof cap is 0.2mm~2mm, and the thickness of the second soundproof cap gradually decreases from the top to the bottom. The thickness ratio of the top of the second soundproof cap, the middle of the second soundproof cap and the bottom of the second soundproof cap is 1.45~1.6:0.62~0.7:0.6.

[0011] In one embodiment, the outer side of the support protrusion extends downward and outward to form a sound-blocking ring, and the projection of the lower end of the sound-blocking ring on the axial direction of the double-layer ear cap is located above the projection of the lower end of the second soundproof cap on the axial direction of the double-layer ear cap. The sound-blocking ring, the support protrusion, and the lower end of the connecting post together form a first groove.

[0012] In one embodiment, the sidewalls and / or bottom wall of the first groove are provided with a sound-absorbing structure.

[0013] In one embodiment, the distance between the projection of the lower end of the second soundproof cap onto the axis of the double-layer ear cap and the projection of the lower end of the sound-blocking ring onto the axis of the double-layer ear cap is 0.2mm to 1mm, and the height of the sound-blocking ring is 0.8mm to 1.5mm.

[0014] In one embodiment, the first soundproof cap includes, from top to bottom, an ear-entry area, a fitting area, and a flat area connected in sequence. The curvature of the sidewall of the ear-in area gradually decreases from top to bottom, the curvature of the sidewall of the fitting area gradually decreases from top to bottom, and the curvature of the sidewall of the flat area remains unchanged from top to bottom.

[0015] An earphone comprising the aforementioned double-layered ear tips.

[0016] In this invention, the lower end of the first soundproof cap is circumferentially positioned around the upper end of the second soundproof cap, reducing the distance between the lower end of the first soundproof cap and the upper end of the second soundproof cap. The lower end of the connecting post has an annular support protrusion, and the lower end of the second soundproof cap is circumferentially positioned around the support protrusion, further reducing the distance between the lower end of the second soundproof cap and the support protrusion. This results in slight compression of the ear after insertion, such as when the user is lying on their side. This not only reduces the deformation space of the first and second soundproof caps, but also allows the second soundproof cap to support the lower end of the first soundproof cap, and the support protrusion to further support the lower end of the second soundproof cap. This reduces the degree of deformation of the first and second soundproof caps, significantly reducing the risk of sound leakage, ensuring a tight seal, and preventing a significant reduction in sound insulation caused by large deformation of the first and second soundproof caps.

[0017] Compared with traditional double-layer ear caps, the double-layer ear caps of this invention reduce the deformation of the first and second soundproof caps, thereby reducing the risk of sound leakage and improving the stability of the soundproofing effect.

[0018] Furthermore, this double-layer ear cap adds an extra layer to the single-layer ear cap, creating an additional sealing area, which greatly improves the sound insulation effect and solves the compatibility problem for various ear canals; the design of the first annular sound insulation cavity and the second annular sound insulation cavity also significantly improves the sound insulation effect of the double-layer ear cap.

[0019] Meanwhile, when the height of the double-layer ear cap is greater than that of the single-layer ear cap, the single-layer ear cap is divided into a double-layer ear cap for sealing and sound insulation. That is, the single piece of high expansion (support) sealing area is dispersed into two pieces of expansion (support) sealing areas that are smaller and larger (from top to bottom). The expansion (support) strength of a single sealing area does not need to be so strong, which reduces the expansion force between the ear cap wall and the ear canal, thereby improving the wearing comfort.

[0020] Furthermore, in this invention, the closed double-layered ear cap ensures absolute sealing, making it suitable for use in headphones with purely physical noise reduction.

[0021] Furthermore, the support protrusion can also block sound.

[0022] Furthermore, the projection of the lower end of the support protrusion onto the axial direction of the double-layer ear cap is located above the projection of the lower end of the second soundproof cap onto the axial direction of the double-layer ear cap, which also facilitates the installation of this double-layer ear cap onto the headphones.

[0023] Preferably, the distance between the inner side of the lower end of the first soundproof cap and the outer side of the upper end of the second soundproof cap is 0.1mm to 0.7mm.

[0024] In the past, the large gap between the outer wall of the lower layer and the inner wall of the upper layer in multi-layer ear caps resulted in a larger deformation space for the ear cap. To address this issue, the inventors of this application have invested significant human, material, and financial resources to reduce this gap, allowing the raised area of ​​the lower outer wall of the multi-layer ear cap to support the inner wall of the upper ear cap (similar to the supporting function of the raised outer wall of the sound-absorbing area). After three years of repeated experiments, through high-precision molds and reverse manufacturing processes, the gap between the lower outer wall and the upper inner wall of the multi-layer ear cap has finally been reduced to 0.05mm, meaning the gap between the lower outer wall and the upper inner wall can be achieved at 0.1mm~0.7mm. This significantly reduces the deformation of the ear cap, thereby minimizing the impact on the fit and seal, greatly improving sealing stability, and enhancing the sound insulation effect.

[0025] Preferably, the thickness of the first soundproof cap gradually decreases from the top to the bottom, and the thickness of the second soundproof cap gradually decreases from the top to the bottom. This design aims to increase the wall thickness of the in-ear area and the contact area while ensuring comfortable wearing, so as to make the ear cap more supportive and ensure the fit and seal of the contact area and the flat area, thereby ensuring the stability of the soundproofing effect.

[0026] Preferably, the outer side of the support protrusion extends downward and outward to form the sound-blocking ring, which can further block sound.

[0027] Preferably, the sidewalls and / or bottom walls of the first groove are provided with the sound-absorbing structure. The sound-absorbing structure can effectively reduce the noise intensity of the sound entering the first groove, thereby achieving a better noise reduction effect.

[0028] Preferably, the first soundproof cap includes, from top to bottom, the ear-insulating area, the fitting area, and the flat area connected in sequence; the curvature of the sidewall of the ear-insulating area gradually decreases from top to bottom, the curvature of the sidewall of the fitting area gradually decreases from top to bottom, and the curvature of the sidewall of the flat area remains unchanged from top to bottom.

[0029] The above design, by simulating the lever principle, allows the contact area that directly contacts the ear canal to exert optimal support, making the first soundproof cap less prone to deformation and ensuring a better fit and seal for sound insulation. This design not only improves the adaptability to different ear canal sizes and shapes but also greatly enhances the sound insulation effect and wearing stability, ensuring that users can maintain a stable and strong sound insulation effect even in different environments or sleeping positions. It also enhances the sound insulation effect and wearing stability, ensuring that users can maintain a stable fit even when lying on their side.

[0030] Preferably, the top of the ear-in-ear area is provided with the second groove, thereby reducing the thickness of the top of the ear-in-ear area, reducing the elasticity generated by the deformation of the top of the ear-in-ear area after the double-layer ear cap is inserted into the ear, and reducing the feeling of pressure when wearing the ear.

[0031] Preferably, the projection of the sidewall of the second groove along the axial direction of the double-layer ear cap falls within the sidewall of the connecting post, thereby avoiding the impact on the overall mechanical strength of the double-layer ear cap after the thickness of the top of the ear inlet area is reduced. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] in: Figure 1 This is a schematic diagram of the structure of a double-layered ear cap in one direction, according to one embodiment.

[0034] Figure 2 For example Figure 1 The diagram shows the structure of the double-layered ear cap from another direction.

[0035] Figure 3 For example Figure 1 The diagram shows the structure of the double-layered ear cap from another direction.

[0036] Figure 4 For example Figure 1 The diagram shows a cross-sectional view of the double-layered ear cap. Detailed Implementation

[0037] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The double-layer ear cap of one embodiment shown includes a connecting post 10 and a first soundproof cap 20 and a second soundproof cap 30, both of which are covered outside the connecting post 10.

[0039] The upper end of the connecting post 10 is connected to the upper end of the first soundproof cap 20, the middle part of the connecting post 10 is connected to the upper end of the second soundproof cap 30, the lower end of the first soundproof cap 20 is arranged around the outer side of the upper end of the second soundproof cap 30, and a first annular soundproof cavity 201 is formed between the first soundproof cap 20 and the second soundproof cap 30.

[0040] The connecting post 10 has a mounting hole 101 that passes through the connecting post. The lower end of the connecting post 10 extends outward to form an annular support protrusion 12. The projection of the lower end of the support protrusion 12 on the axis of the double-layer ear cap is located above the projection of the lower end of the second soundproof cap 30 on the axis of the double-layer ear cap. The lower end of the second soundproof cap 30 is arranged around the outside of the support protrusion 12. A second annular soundproof cavity 301 is formed between the second soundproof cap 30 and the connecting post 10.

[0041] In this invention, the lower end of the first soundproof cap 20 of the double-layered earmuff is wrapped around the outer side of the upper end of the second soundproof cap 30, thus reducing the distance between the lower end of the first soundproof cap 20 and the upper end of the second soundproof cap 30. The lower end of the connecting post 10 has an annular support protrusion 12, and the lower end of the second soundproof cap 30 is wrapped around the outer side of the support protrusion 12, further reducing the distance between the lower end of the second soundproof cap 30 and the support protrusion 12. This results in a slight pressure on the ear after the double-layered earmuff is inserted, for example, in… When the user lies on their side, not only is the deformation space of the first soundproof cap 20 and the second soundproof cap 30 reduced, but the second soundproof cap 30 can also support the lower end of the first soundproof cap 20. The support protrusion 12 can also support the lower end of the second soundproof cap 30, thereby reducing the degree of deformation of the first soundproof cap 20 and the second soundproof cap 30, greatly reducing the risk of sound leakage, ensuring a sealed soundproof environment, and avoiding the significant reduction in soundproofing effect caused by the large deformation of the first soundproof cap 20 and the second soundproof cap 30 in this type of double-layer ear cap.

[0042] Compared with traditional double-layer ear caps, the double-layer ear caps of this invention reduce the deformation of the first soundproof cap 20 and the second soundproof cap 30, thereby reducing the risk of sound leakage and improving the stability of the soundproofing effect.

[0043] Furthermore, this double-layer ear cap, by adding an extra layer to the single-layer ear cap, creates an additional sealing area, significantly improving sound insulation and adaptability to various ear canals. The inclusion of the first annular sound insulation cavity 201 and the second annular sound insulation cavity 301 also greatly enhances the sound insulation effect of the double-layer ear cap.

[0044] Meanwhile, when the height of the double-layer ear cap is greater than that of the single-layer ear cap, the single-layer ear cap is divided into a double-layer ear cap for sealing and sound insulation. That is, the single piece of high expansion (support) sealing area is dispersed into two pieces of expansion (support) sealing areas that are smaller and larger (from top to bottom). The expansion (support) strength of a single sealing area does not need to be so strong, which reduces the expansion force between the ear cap wall and the ear canal, thereby improving the wearing comfort.

[0045] Furthermore, in this invention, the closed double-layered ear cap ensures absolute sealing, making it suitable for use in headphones with purely physical noise reduction.

[0046] Furthermore, the support protrusion 12 can also block sound.

[0047] Furthermore, the projection of the lower end of the support protrusion 12 onto the axis of the double-layer ear cap is located above the projection of the lower end of the second soundproof cap 30 onto the axis of the double-layer ear cap, which also facilitates the installation of this double-layer ear cap onto the headphones.

[0048] The connecting post 10 has a through mounting hole 101, which makes this double-layer ear cap suitable for use in headphones. The through mounting hole 101 can reduce the expansion force (strain) of the double-layer ear cap and improve long-term wearing comfort.

[0049] Referring to the accompanying drawings, in this embodiment, the upper space of the mounting hole 101 is smaller than the lower space of the mounting hole 101, thereby reducing the feeling of pressure when the double-layer ear cap is inserted into the ear.

[0050] Referring to the accompanying drawings, in this embodiment, the angle between the outer wall of the connecting post 10 and the inner wall of the first soundproof cap 20 is 20°, which can reduce the feeling of pressure when the double-layer ear cap is inserted into the ear.

[0051] It should be noted that in this embodiment, the connecting column 10, the first soundproof cap 20 and the second soundproof cap 30 are all made of nanoporous liquid soft material (e.g., silicone), which can absorb and reduce most of the noise from the outside, thereby reducing the intensity of the noise.

[0052] Specifically, in this embodiment, the double-layer ear caps are manufactured as a single piece.

[0053] Preferably, in this embodiment, the hardness of the silicone is 25 to 60 degrees. In other embodiments, materials with appropriate hardness can be selected according to actual needs.

[0054] Preferably, in this embodiment, the distance between the inner side of the lower end of the first soundproof cap 20 and the outer side of the upper end of the second soundproof cap 30 is 0.1mm to 0.7mm.

[0055] The distance between the inner side of the lower end of the first soundproof cap 20 and the outer side of the upper end of the second soundproof cap 30 refers to the minimum value between the two.

[0056] In the past, the large gap between the outer wall of the lower layer and the inner wall of the upper layer in multi-layer ear caps resulted in a large deformation space for the ear cap. To address this issue, the inventors of this application have invested significant human, material, and financial resources to reduce this gap, allowing the protruding area of ​​the lower layer's outer wall to support the inner wall of the upper layer (similar to the supporting function of the protruding outer wall of the sound-absorbing area). After three years of repeated experiments, through high-precision molds and reverse manufacturing processes, the gap between the lower layer's outer wall and the upper layer's inner wall in multi-layer ear caps has finally been reduced to 0.1mm. That is, the gap between the lower layer's outer wall and the upper layer's inner wall can be achieved at 0.1mm to 0.7mm. This significantly reduces the deformation of the ear cap, thereby reducing the impact on the fit and seal, greatly improving the sealing stability, and enhancing the sound insulation effect.

[0057] Preferably, in this embodiment, the distance between the inner wall of the lower end of the second soundproof cap 30 and the support protrusion 12 is 0.2mm~1mm, so that the support protrusion 12 can better support the second soundproof cap 30, reduce the deformation of the second soundproof cap 30, reduce the risk of sound leakage, and improve the stability of the soundproofing effect.

[0058] Preferably, in this embodiment, the ratio of the height of the first soundproof cap 20 to the overall height of the double-layer ear cap is 0.46~0.54:1. This size design optimizes the overall height ratio of the first soundproof cap 20, improves ear comfort, and also allows the second soundproof cap 30 to better support the lower end of the first soundproof cap 20.

[0059] Preferably, in this embodiment, the thickness of the first soundproof cap 20 is 0.3mm to 2mm, and the thickness of the first soundproof cap 20 gradually decreases from the top to the bottom. The thickness ratio of the top, middle and bottom of the first soundproof cap 20 is 1:0.6 to 0.75:0.56 to 0.68.

[0060] Preferably, in this embodiment, the thickness of the second soundproof cap 30 is 0.2mm to 2mm, the thickness of the second soundproof cap 30 gradually decreases from the top to the bottom, and the thickness ratio of the top end of the second soundproof cap 30, the middle part of the second soundproof cap 30 and the bottom end of the second soundproof cap 30 is 1.45 to 1.6: 0.62 to 0.7: 0.6.

[0061] The thickness of the first soundproof cap 20 gradually decreases from the top to the bottom, and the thickness of the second soundproof cap 30 gradually decreases from the top to the bottom. The purpose of this design is to increase the wall thickness of the in-ear area and the contact area while ensuring comfortable wearing, so as to make the ear cap more supportive and ensure the fit and seal of the contact area and the flat area, thereby ensuring the stability of the soundproofing effect.

[0062] The thickness ratio of the upper end, middle part, and lower end of the first soundproof cap 20 is 1:0.6~0.75:0.56~0.68, and the thickness ratio of the upper end, middle part, and lower end of the second soundproof cap 30 is 1.45~1.6:0.62~0.7:0.6. This design ensures that the thickness variations of the first soundproof cap 20 and the second soundproof cap 30 are as expected. While ensuring comfortable wear, it strengthens the support of the ear caps, ensures the sealing of the fitting area and the flat area, and guarantees the stability of the soundproofing effect.

[0063] Preferably, referring to the accompanying drawings, in this embodiment, the outer side of the support protrusion 12 extends downward and outward to form a sound-blocking ring 14. The projection of the lower end of the sound-blocking ring 14 in the axial direction of the double-layer ear cap is located below the projection of the lower end of the second soundproof cap 30 in the axial direction of the double-layer ear cap. The sound-blocking ring 14, the support protrusion 12 and the lower end of the connecting post 10 together form the first groove 102.

[0064] The outer side of the support protrusion 12 extends downward and outward to form a sound-blocking ring 14, which can further block sound.

[0065] Preferably, in this embodiment, the sidewall and / or bottom wall of the first groove 102 are provided with a sound-absorbing structure 103. The sound-absorbing structure 103 can silence the sound entering the first groove 102, thereby greatly reducing the noise intensity and achieving a better noise reduction effect.

[0066] The noise reduction structure 103 can reduce the noise intensity of the sound entering the first groove 103, thereby achieving a better noise reduction effect.

[0067] More preferably, in this embodiment, the noise-absorbing structure 103 is a plurality of multifaceted convex rhombuses. It should be noted that in this invention, the number of sides of a convex rhombus determines its number of facets.

[0068] Referring to the accompanying drawings, specifically in this embodiment, the noise-absorbing structure 103 is a five-sided convex rhombus.

[0069] Preferably, in this embodiment, the distance between the projection of the lower end of the second soundproof cap 30 onto the axial direction of the double-layer ear cap and the projection of the lower end of the sound-blocking ring 14 onto the axial direction of the double-layer ear cap is 0.2mm~1mm, and the height of the sound-blocking ring 14 is 0.8mm~1.5mm.

[0070] Preferably, in this embodiment, the first soundproof cap 20 includes, from top to bottom, an ear-entry area 22, a fitting area 24, and a flat area 26 connected in sequence.

[0071] The curvature of the sidewall of the ear inlet area 22 gradually decreases from top to bottom, the curvature of the sidewall of the fitting area 24 gradually decreases from top to bottom, and the curvature of the sidewall of the flat area 26 remains unchanged from top to bottom.

[0072] The above design, by simulating the lever principle, allows the contact area 24, which directly contacts the ear canal, to exert optimal support, preventing the first soundproof cap 20 from deforming and ensuring a better fit and seal for sound insulation. This design not only improves the fit for different ear canal sizes and shapes but also significantly enhances sound insulation and wearing stability, ensuring stable sound insulation even in different environments or sleeping positions. It further enhances sound insulation and wearing stability, guaranteeing stable wear even when the user is lying on their side.

[0073] This utility model also discloses an embodiment of an earphone including the above-described double-layer ear caps.

[0074] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0075] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0076] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the 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" the 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.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-layered ear cap, characterized in that, Includes a connecting post and a first soundproof cap and a second soundproof cap, both of which are covered outside the connecting post; The upper end of the connecting post is connected to the upper end of the first soundproof cap, the middle part of the connecting post is connected to the upper end of the second soundproof cap, the lower end of the first soundproof cap is circumferentially arranged on the outer side of the upper end of the second soundproof cap, and a first annular soundproof cavity is formed between the first soundproof cap and the second soundproof cap. The connecting post has a through mounting hole. The lower end of the connecting post extends outward to form an annular support protrusion. The projection of the lower end of the support protrusion on the axis of the double-layer ear cap is above the projection of the lower end of the second soundproof cap on the axis of the double-layer ear cap. The lower end of the second soundproof cap is circumferentially arranged on the outside of the support protrusion. A second annular soundproof cavity is formed between the second soundproof cap and the connecting post.

2. The double-layered ear cap according to claim 1, characterized in that, The distance between the inner side of the lower end of the first soundproof cap and the outer side of the upper end of the second soundproof cap is 0.1mm to 0.7mm.

3. The double-layered ear cap according to claim 2, characterized in that, The distance between the inner wall of the lower end of the second soundproof cap and the supporting protrusion is 0.2mm~1mm.

4. The double-layered ear cap according to claim 2, characterized in that, The ratio of the height of the first soundproof cap to the overall height of the double-layer ear cap is 0.46~0.54:

1.

5. The double-layered ear cap according to claim 4, characterized in that, The thickness of the first soundproof cap is 0.3mm to 2mm, and the thickness of the first soundproof cap gradually decreases from the top to the bottom. The thickness ratio of the top of the first soundproof cap, the middle of the first soundproof cap, and the bottom of the first soundproof cap is 1:0.6 to 0.75:0.56 to 0.

68. The thickness of the second soundproof cap is 0.2mm~2mm, and the thickness of the second soundproof cap gradually decreases from the top to the bottom. The thickness ratio of the top of the second soundproof cap, the middle of the second soundproof cap and the bottom of the second soundproof cap is 1.45~1.6:0.62~0.7:0.

6.

6. The double-layered ear cap according to any one of claims 1 to 5, characterized in that, The outer side of the support protrusion extends downward and outward to form a sound-blocking ring. The projection of the lower end of the sound-blocking ring on the axial direction of the double-layer ear cap is located above the projection of the lower end of the second soundproof cap on the axial direction of the double-layer ear cap. The sound-blocking ring, the support protrusion, and the lower end of the connecting post together form a first groove.

7. The double-layered ear cap according to claim 6, characterized in that, The sidewalls and / or bottom wall of the first groove are provided with a sound-absorbing structure.

8. The double-layered ear cap according to claim 6, characterized in that, The distance between the projection of the lower end of the second soundproof cap onto the axis of the double-layer ear cap and the projection of the lower end of the sound-blocking ring onto the axis of the double-layer ear cap is 0.2mm~1mm, and the height of the sound-blocking ring is 0.8mm~1.5mm.

9. The double-layered ear cap according to claim 6, characterized in that, The first soundproof cap includes, from top to bottom, an ear-entry area, a fitting area, and a flat area connected in sequence; The curvature of the sidewall of the ear-in area gradually decreases from top to bottom, the curvature of the sidewall of the fitting area gradually decreases from top to bottom, and the curvature of the sidewall of the flat area remains unchanged from top to bottom.

10. An earphone, characterized in that, Includes the double-layered ear cap as described in any one of claims 1 to 9.

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