An adaptive tilt pressure sealing ring and noise-canceling earplug

Abstract

This utility model discloses an adaptive tilt pressure sealing ring and a noise-canceling earplug. The sealing ring includes a sealing lip, which comprises a lip tip and a lip body. The lip tip abuts against the front end of the lip body and forms an integral structure with it. The outer surface of the lip body extends backward and outward at an angle, so that the lip body gradually thickens backward. The inner wall of the sealing lip, corresponding to the main body of the lip body, forms a rearward and outward inclined surface, so that the inner cavity of the sealing lip corresponding to the main body of the lip body forms an flared structure that gradually widens from front to back. This allows the sealing lip to undergo gradual deformation under force, automatically adjusting the deformation direction under tilt pressure, increasing the contact area. The deformation direction can be adjusted through the deformation cooperation between the lip tip and the lip body, eliminating the risk of leakage and improving the noise-canceling effect of the earplug.

Description

Technical Field

[0001] This utility model relates to the technical field of headphone products, and in particular to a sealing ring and noise-canceling earplugs. Background Technology

[0002] Sealing rings are commonly used sealing devices, generally made of rubber materials (such as silicone). They utilize the elastic deformation properties of the material to provide functions such as waterproofing, dustproofing, and noise reduction. For example, in noise-canceling headphones (earplugs), sealing rings are used to seal the entrance of the sound outlet, thus improving the noise-canceling performance of the headphones. Traditional sealing rings are usually just O-rings or circular gaskets, which have poor sealing effects. There are also sealing rings that are designed according to the actual structure of the installation location. For example, Chinese utility model patent CN202321303511.1 discloses a headphone and headphone assembly, whose elastic sealing ring includes a narrowed portion and an arc-shaped drum surface. However, this structure, where both the inner and outer walls are essentially flat, results in poor axial shrinkage and deformation performance of the main body of the sealing ring. This leads to the following problems: 1. Off-center load failure: When the pressure direction is at an angle (>5°) to the sealing axis, traditional sealing rings may experience excessive compression on one side, leading to material fatigue and sealing failure on the other side, causing leakage; 2. Insufficient compensation capability: The lip structure of ordinary sealing rings cannot adapt to non-uniform pressure distribution; 3. Poor adaptability to complex working conditions: The sealing performance will drop sharply when vibration, impact, and tilting pressure are superimposed. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a sealing ring and noise-reducing earplug with a more rational structural design, capable of adapting to tilting and non-uniform pressure, and offering better sealing performance.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a sealing ring with adaptive tilt pressure, including a sealing lip, the sealing lip including a lip tip and a lip body, the lip tip abutting the front end of the lip body and forming an integral structure with the lip body; the outer surface of the lip body extends backward and outward at an angle, so that the lip body forms a structure that gradually thickens backward; the inner cavity wall of the sealing lip forms a rear slope that is inclined backward and outward at the part corresponding to the main body of the lip body, so that the inner cavity of the sealing lip corresponding to the main body of the lip body forms an flared structure that gradually widens from front to back.

[0005] Furthermore, the inner front end of the sealing lip has a front bevel that gradually tapers from front to back, the front end of the front bevel extends to the inner side of the lip tip, and the tail end of the front bevel connects with the front end of the rear bevel.

[0006] Preferably, the surface of the lip tip is an arc-shaped surface.

[0007] Furthermore, it also includes a base pad, which is located on the bottom outer side of the lip body and is integrated with the lip body. The inner cavity of the sealing lip extends to the position of the base pad to form a circular hole, and the wall surface of the circular hole is cylindrical.

[0008] A noise-canceling earplug includes a housing, an inner support, and a circuit assembly, wherein the inner support and the circuit assembly are disposed in the housing. The earplug is characterized in that it further includes the aforementioned sealing ring, which is disposed around the sound outlet hole inside the housing, and the bottom surface of the inner support presses against the sealing lip of the sealing ring.

[0009] Furthermore, the housing includes a bottom shell and a top cover, with an inner support set in the bottom shell and covered by the top cover; the bottom surface of the bottom shell has a fixing head, and an installation groove is provided in the bottom shell, with a sound outlet hole passing through the fixing head from the installation groove, and a sealing ring set in the installation groove to press against the inner support.

[0010] Furthermore, the sealing ring also includes a base gasket, which is located on the bottom outer side of the lip body. Several recesses are provided at the bottom of the base gasket. Several protrusions that match the recesses are provided in the mounting groove. The protrusions are embedded in the recesses to form a positioning structure for the sealing ring.

[0011] This invention employs a sealing lip design that gradually thickens from the tip to the rear, causing the sealing lip to deform progressively under pressure. Under tilted pressure, the deformation direction automatically adjusts. Specifically, in the initial contact stage, slight deformation at the lip tip achieves pre-sealing; as pressure increases, the elastic zone of the lip body folds inwards, increasing the contact area by more than 50%. When this sealing lip is used in earplugs, the inner support and top cover will tilt at a certain angle under the elastic force of the sealing lip. The deformation direction can be adjusted by the deformation of the lip tip and body, thereby eliminating the risk of leakage and improving the noise reduction effect of the earplugs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the sealing ring of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall structure of the sealing ring of this utility model from another angle;

[0014] Figure 3 This is a cross-sectional view of the sealing ring of this utility model;

[0015] Figure 4 This is a schematic diagram of the overall structure of the earplug of this utility model;

[0016] Figure 5 This is a cross-sectional schematic diagram of the main body of the earplug of this utility model;

[0017] Figure 6 This is a schematic diagram of the assembly of the inner support and sealing ring of the earplug of this utility model;

[0018] Figure 7 This is a schematic diagram of the bottom shell structure of the earplug of this utility model.

[0019] In the diagram, 1 is the sealing ring, 11 is the lip tip, 12 is the lip body, 13 is the bottom pad, 14 is the front bevel, 15 is the rear bevel, 16 is the hole wall, 17 is the recess, 2 is the bottom shell, 21 is the fixing head, 22 is the sound outlet, 23 is the mounting groove, 24 is the protrusion, 3 is the inner bracket, 4 is the top cover, and 5 is the silicone sleeve. Detailed Implementation

[0020] In this embodiment, refer to Figures 1-3 The adaptive tilt pressure sealing ring 1 includes a sealing lip, which includes a lip tip 11 and a lip body 12. The lip tip 11 is abutted against the front end of the lip body 12 and forms an integral structure with the lip body 12. It is made of silicone. The outer surface of the lip body 12 extends backward and outward at an angle so that the lip body 12 forms a structure that gradually thickens backward, i.e., an outer conical surface. The inner cavity wall of the sealing lip forms a rear slope 15 (i.e., an inner conical surface) that slopes backward and outward at the part corresponding to the main body of the lip body 12, so that the sealing lip forms an flared structure that gradually widens from front to back in the inner cavity corresponding to the main body of the lip body 12. This structure is beneficial for the lip body 12 to deform and fold under pressure.

[0021] The inner cavity of the sealing lip has a front bevel 14 (inner conical surface) that gradually tapers from front to back. The front end of the front bevel 14 extends to the inner surface of the lip tip 11, and the tail end of the front bevel 14 connects with the front end of the rear bevel 15. The surface of the lip tip 11 is an arc-shaped surface.

[0022] It also includes a base pad 13, which is located on the bottom outer side of the lip body 12 and is integrally formed with the lip body 12 for easy installation. The inner cavity of the sealing lip extends to the position of the base pad 13 to form a circular hole, and the wall surface 16 of the circular hole is cylindrical.

[0023] Reference Figures 4-7 The noise-canceling earplug includes a housing, an inner support 2, and a circuit assembly, with the inner support 2 and the circuit assembly disposed in the housing; it also includes a sealing ring 1, which is disposed around the sound outlet 22 inside the housing, with the bottom surface of the inner support 3 pressing against the sealing lip of the sealing ring 1.

[0024] The housing includes a bottom shell 2 and a top cover 4. An inner support 3 is disposed in the bottom shell 2 and covered by the top cover 4. The bottom surface of the bottom shell 2 has a fixing head 21 for fixing a silicone sleeve 5 (ear cover). An installation groove 23 is provided in the bottom shell 2. The sound outlet 22 passes through the fixing head 21 from the installation groove 23. A sealing ring 1 is disposed in the installation groove 23 and presses against the inner support 3.

[0025] The bottom of the base pad 13 of the sealing ring 1 is provided with several recesses 17 (four in total); the mounting groove 23 is provided with protrusions 24 that match each recess 17, and the protrusions 25 are embedded in the recesses 17 to form a positioning structure for the sealing ring 1, so that the sealing ring 1 will not be displaced.

[0026] by Figure 5 For this earbud, the inner support 3 is rotatable. Under the elastic force of the sealing ring 1, the left end of the inner support 3 and the top cover 4 will be slightly raised higher than the right end, resulting in the sealing plane of the sealing ring 1 and the inner support 3 being in inclined contact. If a traditional sealing ring is used, there is a risk of leakage on the left side of the sealing ring. However, the sealing ring 1 of this utility model can adjust the deformation direction through the sealing lip to solve the leakage risk and improve the sealing effect. Specifically: in the initial contact stage: the lip tip 11 contacts the inner support 3 and produces a slight deformation to achieve pre-sealing; in the pressure rise stage: the elastic area of ​​the lip body 2 folds and deforms inward, thereby increasing its contact area with the inner support by more than 50%. In this way, the sealing ring 1 automatically adjusts the deformation direction under inclined pressure to achieve a good sealing effect.

[0027] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A seal ring that self-adapts to an oblique pressure, comprising a seal lip, characterized in that: The sealing lip includes a lip tip and a lip body. The lip tip is attached to the front end of the lip body and forms an integral structure with the lip body. The outer surface of the lip body extends backward and outward at an angle, so that the lip body forms a structure that gradually thickens backward. The inner wall of the sealing lip forms a backward and outward inclined rear slope at the part corresponding to the main body of the lip body, so that the inner cavity of the sealing lip corresponding to the main body of the lip body forms an flared structure that gradually widens from front to back.

2. The self-adapting tilt pressure seal ring of claim 1, wherein: The inner cavity of the sealing lip has a front bevel that gradually tapers from front to back. The front end of the front bevel extends to the inner side of the lip tip, and the tail end of the front bevel connects with the front end of the rear bevel.

3. The self-adapting tilt pressure seal ring of claim 1, wherein: The surface of the lip tip is an arc-shaped surface.

4. The self-adapting tilt pressure seal ring of claim 1, wherein: It also includes a base pad, which is located on the bottom outer side of the lip body and is integrated with the lip body. The inner cavity of the sealing lip extends to the position of the base pad to form a round hole, and the wall surface of the round hole is cylindrical.

5. The self-adapting tilt pressure seal ring of claim 4, wherein: Several recesses are provided at the bottom of the base pad.

6. A noise reducing earplug comprising a housing, an inner support and a circuit assembly, the inner support and circuit assembly being disposed in the housing, characterized by: It also includes a sealing ring as described in any one of claims 1-5, wherein the sealing ring is disposed around the sound outlet hole inside the housing, and the bottom surface of the inner bracket presses against the sealing lip of the sealing ring.

7. The noise-reducing earplug of claim 6, wherein: The housing includes a bottom shell and a top cover. An inner support is disposed in the bottom shell and covered by the top cover. The bottom surface of the bottom shell has a fixing head. An installation groove is provided in the bottom shell. The sound outlet passes through the fixing head from the installation groove. A sealing ring is disposed in the installation groove and presses against the inner support.

8. The noise reducing earplug of claim 7, wherein: The sealing ring also includes a base gasket, which is located on the bottom outer side of the lip body. Several recesses are provided at the bottom of the base gasket. Several protrusions that match the recesses are provided in the mounting groove. The protrusions are embedded in the recesses to form a positioning structure for the sealing ring.

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