Adjustable noise reduction earplug

Abstract

The utility model relates to an adjustable noise reduction earplug, which comprises an earplug skeleton main body, an adjustable middle disc and an earplug upper cover, the earplug upper cover is fixedly connected with the earplug skeleton main body, and the adjustable middle disc and the earplug skeleton main body are coaxially assembled. The outer edge of the adjustable middle disc abuts against the earplug upper cover and the earplug skeleton main body. A sound guide channel and a noise reduction damping cavity are arranged in the earplug framework main body, the noise reduction damping cavity is communicated with the sound guide channel, and a noise reduction damping piece is arranged in the noise reduction damping cavity. A plurality of sound guide structures are arranged on the adjustable middle disc in the circumferential direction, and the adjustable middle disc can rotate in the axial direction so that the corresponding sound guide structures can be communicated with the sound guide channels, and multi-stage noise reduction channels with different damping effects are formed. According to the noise reduction earplug, various noise reduction gears and sound guide structures are provided, the noise reduction earplug is suitable for various different noise environments and user requirements, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to an adjustable noise-canceling earplug. Background Technology

[0002] In daily life and work, users are often exposed to varying levels of noise, which can affect concentration or work efficiency. Therefore, adjustable noise-canceling earbuds have emerged. Users can choose the appropriate noise-canceling level based on the real-time noise environment, experiencing a more comfortable environment. Utility Model Content

[0003] To achieve adjustable noise cancellation levels under different noise environments and improve user experience, this utility model proposes an adjustable noise-canceling earplug. The technical solution proposed by this utility model is as follows:

[0004] This utility model provides an adjustable noise-canceling earplug, including: an earplug frame body, an adjustable middle plate, and an earplug top cover;

[0005] The earplug cover is fixedly connected to the earplug frame body;

[0006] The adjustable middle plate is coaxially assembled with the main body of the earbud frame;

[0007] The outer edge of the adjustable middle plate abuts against the earplug top cover and the earplug frame body, respectively;

[0008] The earbud frame body is provided with a sound guiding channel and a sound damping cavity. The sound damping cavity is connected to the sound guiding channel, and a sound damping element is provided inside the sound damping cavity.

[0009] The adjustable center plate has an air inlet on its outer wall and various sound guiding structures arranged circumferentially. The adjustable center plate can be rotated axially to connect the corresponding sound guiding structure with the sound guiding channel, forming a multi-level noise reduction channel with different damping effects.

[0010] In one or more embodiments, the earbud frame body includes a pivot, and the outer periphery of the pivot is provided with ratchet teeth;

[0011] The adjustable disc is provided with a ratchet spring along its inner circumference, and the ratchet spring includes multiple pairs of ratchet grooves that match the shape of the ratchet.

[0012] In one or more embodiments, a limiting block is provided on the side of the earbud frame body facing the adjustable center plate, and a limiting groove is provided on the bottom of the adjustable center plate corresponding to the position of the limiting block.

[0013] In one or more embodiments, the adjustable noise-canceling earplugs described above further include a first tuning mesh.

[0014] The various sound guiding structures include through holes, tuning mesh damping holes, and blind zone holes. The diameter of the through holes is larger than the diameter of the tuning mesh damping holes, and the diameter of the tuning mesh damping holes is smaller than the width of the sound guiding channel.

[0015] The first tuning mesh is disposed on the tuning mesh damping hole;

[0016] When the adjustable center plate rotates axially, the through hole, the damping hole of the tuning mesh, and the blind hole can be connected with the sound guiding channel to form a multi-level noise reduction channel with different damping effects.

[0017] In one or more embodiments, the adjustable center plate is provided with a gear shifting handle along its outer periphery.

[0018] In one or more embodiments, the adjustable noise-canceling earplugs further include an ear cap, which is disposed at the tail end of the earplug skeleton body.

[0019] In one or more embodiments, the adjustable noise-canceling earplugs described above further include a first seal and a second seal;

[0020] The earplug cover includes a rib, and the first sealing element is disposed between the rib and the adjustable center plate;

[0021] The second seal is disposed between the adjustable center plate and the entrance position of the sound guide channel.

[0022] In one or more embodiments, the adjustable disc has a limiting rib on the outer periphery of the first seal.

[0023] In one or more embodiments, the adjustable noise-canceling earplugs described above further include a second tuning mesh.

[0024] The second tuning mesh is disposed at the tail end of the sound-absorbing damping cavity.

[0025] In one or more embodiments, the earplug cover includes a central shaft, and the shaft is provided with a central shaft hole for receiving the central shaft.

[0026] Based on the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0027] This utility model provides an adjustable noise-canceling earplug with multiple axial adjustment levels via an adjustable central plate. Various sound-guiding structures are circumferentially arranged on the adjustable central plate, each level corresponding to a different sound-guiding structure and noise-canceling effect. When the adjustable central plate is rotated axially to different levels, the corresponding sound-guiding structure connects with the sound-guiding channel, forming multiple levels of noise-canceling channels with varying damping effects. Due to the multiple noise-canceling levels and sound-guiding structures, this adjustable noise-canceling earplug is suitable for various noise environments and user needs. Users can select the most suitable noise-canceling level according to different ambient noise levels or personal preferences, achieving a more personalized and flexible noise-canceling effect and enhancing the user experience.

[0028] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of the adjustable noise-canceling earplug provided in this embodiment of the utility model;

[0032] Figure 2a This is a top view of the adjustable noise-canceling earplug provided in this embodiment of the present invention when it is in the first noise-canceling level;

[0033] Figure 2b yes Figure 2a AA section view;

[0034] Figure 3a This is a schematic diagram of the structure of the adjustable noise-canceling earplug below the earplug cover when it is in the first noise-canceling position according to the embodiment of this utility model.

[0035] Figure 3b yes Figure 3a AA section view;

[0036] Figure 4aThis is a top view of the adjustable noise-canceling earplug provided in this embodiment of the present invention when it is in the second noise-canceling mode;

[0037] Figure 4b yes Figure 4a AA section view;

[0038] Figure 5a This is a schematic diagram of the structure of the adjustable noise-canceling earplug provided in this embodiment of the invention when it is in the second noise-canceling mode, specifically the part below the earplug cover.

[0039] Figure 5b yes Figure 5a AA section view;

[0040] Figure 6a This is a top view of the adjustable noise-canceling earplug provided in this embodiment of the present invention when it is in the third noise-canceling setting;

[0041] Figure 6b yes Figure 6a AA section view;

[0042] Figure 7a This is a schematic diagram of the structure of the adjustable noise-canceling earplug below the top cover when it is in the third noise-canceling position according to the embodiment of this utility model.

[0043] Figure 7b yes Figure 7a AA sectional view.

[0044] In the diagram: 1. Earplug frame body; 10. Rotating shaft; 11. Sound guide channel; 12. Noise damping cavity; 13. Ratchet; 14. Limiting block; 2. Adjustable center plate; 20. Adjustment handle; 21. Through hole; 22. Adjustment mesh damping hole; 23. Blind hole; 24. Ratchet spring; 241. Ratchet groove; 25. Center shaft; 26. Limiting rib; 27. Air inlet; 3. Earplug top cover; 30. Rib plate; 4. First seal; 5. Second seal; 6. First adjustment mesh; 7. Noise damping component; 8. Second adjustment mesh; 9. Ear cap. Detailed Implementation

[0045] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] While existing noise-canceling earplugs offer some noise reduction, they cannot adjust the noise-canceling level according to different ambient noise levels or personal preferences, thus failing to meet users' noise-canceling needs in various noise environments and not fulfilling the inventor's expectations. Through further research and development, the inventor created this utility model.

[0050] Example 1

[0051] This utility model embodiment provides an adjustable noise-canceling earplug, see reference. Figure 1 , Figure 2a , Figure 2b As shown, it includes: an earbud frame body 1, an adjustable middle plate 2, and an earbud top cover 3. The earbud top cover 3 is fixedly connected to the earbud frame body 1, and the adjustable middle plate 2 is coaxially assembled with the earbud frame body 1. The outer edge of the adjustable middle plate 2 abuts against the earbud top cover 3 and the earbud frame body 1 respectively.

[0052] The earplug skeleton body 1 is provided with a sound guiding channel 11 and a sound damping cavity 12, which is the front mouthpiece damping cavity of the earplug. The sound damping cavity 12 is connected to the sound guiding channel 11, and a sound damping element 7 is provided inside the sound damping cavity 12. The sound damping element 7, through its internal porous structure, can effectively disperse and absorb sound wave vibrations transmitted to the material, thereby reducing the generation and transmission of noise. The sound damping element 7 can be made of existing sound-absorbing materials, such as sound-absorbing damping sponge.

[0053] The adjustable middle plate 2 has an air inlet 27 on its outer wall. The adjustable middle plate 2 has a variety of sound guiding structures arranged circumferentially. The adjustable middle plate 2 can be axially adjusted to multiple gears. Each gear has a corresponding sound guiding structure to match it. By cooperating different sound guiding structures with the sound guiding channel 11 and the sound damping cavity 12, different noise reduction gears with different damping effects can be achieved.

[0054] The portion of the adjustable middle plate 2 that abuts against the earbud cover 3 and the earbud frame body 1 can be configured to extend beyond the edges of the earbud cover 3 and the earbud frame body 1. Thus, the axial rotation of the adjustable middle plate 2 can be achieved by rotating its outer edge. Alternatively, an adjustment handle 20 can be provided on the outer periphery of the adjustable middle plate 2, allowing for axial rotation of the adjustable middle plate 2 by moving the adjustment handle 20.

[0055] When the adjustable middle plate 2 is axially rotated to a certain position, the corresponding sound guiding structure moves to the position of the sound guiding channel 11 and connects with the sound guiding channel 11 to form a noise reduction channel. The adjustable noise-canceling earplug provided by this utility model includes multiple sound guiding structures and a corresponding number of noise reduction levels. By adjusting the angle of axial rotation of the adjustable middle plate 2, the corresponding sound guiding structure can be connected with the sound guiding channel 11 to form multiple levels of noise reduction channels with different damping effects.

[0056] The adjustable noise-canceling earplugs provided in this embodiment of the invention feature multiple circumferentially arranged sound-guiding structures on the adjustable central plate 2, allowing for axial adjustment of multiple levels, each corresponding to a different sound-guiding structure and noise-canceling effect. This design enables users to select the most suitable noise-canceling level based on different ambient noise levels or personal preferences, achieving a more personalized and flexible noise-canceling effect. By incorporating a sound-absorbing damping element 7 within the sound-absorbing damping cavity 12, the porous structure inside the damping element 7 effectively disperses and absorbs sound wave vibrations, significantly reducing noise generation and transmission. This structural design enhances the earplugs' noise-canceling capability, providing users with a quieter environment. Furthermore, the adjustable central plate 2 design makes adjusting the noise-canceling level simple and quick. Users can easily select the desired noise-canceling level by rotating the outer edge of the adjustable central plate 2 or by tossing the adjustment handle 20. This intuitive and easy-to-master operation improves the user experience. Due to the provision of multiple noise-canceling levels and sound-guiding structures, the adjustable noise-canceling earplugs of this invention are suitable for various noise environments and user needs. Whether for everyday use or in specific occasions such as air travel or concerts, users can find a noise cancellation mode that suits them.

[0057] In addition, the adjustable noise-canceling earplug provided in this embodiment of the utility model has a compact overall structure design. The earplug top cover 3 is fixedly connected to the earplug skeleton body 1, and the adjustable middle plate 2 is coaxially assembled and abuts against both, so that the earplug not only has a good noise reduction effect, but also has high structural stability and durability.

[0058] In an optional embodiment, the adjustable middle plate 2 and the earbud frame body 1 utilize a ratchet mechanism for rotation adjustment, providing the user with a perfect tactile experience. (Refer to...) Figure 2b As shown, the earbud frame body 1 includes a pivot 10. (Refer to...) Figure 3a , Figure 5a and Figure 7a As shown, the outer periphery of the rotating shaft 10 is provided with ratchet teeth 13. The adjustable center plate 2 has ratchet spring pieces 24 along its inner periphery, each ratchet spring piece 24 including multiple pairs of ratchet grooves 241 that match the shape of the ratchet teeth 13. The number of ratchet groove pairs corresponds to the number of circumferentially arranged sound guiding structures on the adjustable center plate 2 and the number of adjustment positions on the adjustable center plate 2. Taking the adjustable center plate 2 with three circumferentially arranged sound guiding structures as an example, the corresponding number of ratchet groove pairs is three pairs, and the number of adjustment positions on the adjustable center plate 2 is three.

[0059] This invention ensures precision and stability during noise cancellation adjustment by interlocking the ratchet 13 with the ratchet groove 241 on the ratchet spring 24. Each time the user rotates to a new noise cancellation level, the ratchet 13 is firmly locked in the corresponding ratchet groove 241, preventing accidental slippage or level misalignment and ensuring the stability and consistency of the noise cancellation effect. Furthermore, the ratchet mechanism generates a certain amount of resistance during adjustment; this mechanical feedback allows the user to clearly perceive the level change, improving the feel and accuracy of operation. Simultaneously, since the earbuds are typically made of silicone, the softness of the silicone material also alleviates this mechanical feeling to some extent, making operation more comfortable. The ratchet mechanism design allows the adjustable center plate 2 to easily switch between different noise cancellation levels, meeting the user's different needs for noise cancellation effects in various environments.

[0060] In an optional embodiment, refer to Figure 2b , Figure 3a and Figure 3b As shown, a limiting block 14 is provided on the side of the earbud frame body 1 facing the adjustable middle plate 2, and a limiting groove (not shown in the figure) is provided on the bottom of the adjustable middle plate 2 corresponding to the position of the limiting block 14. The length of the limiting groove is the length of the adjustable middle plate 2 from the first adjustment position to the last adjustment position. The limiting block 14 is used to limit the adjustable middle plate 2 in the first adjustment position and the last adjustment position. When the adjustable middle plate 2 is in the first adjustment position, the limiting block 14 abuts against the first end of the limiting groove. When the adjustable middle plate 2 is in the last adjustment position, the limiting block 14 abuts against the other end of the limiting groove.

[0061] This invention prevents excessive rotation of the adjustable middle plate 2 through the design of the ratchet mechanism and the limiting mechanism, avoiding structural damage or functional failure caused by excessive rotation. This protection mechanism not only protects the earbud itself but also ensures the safety and stability of the user during use.

[0062] In an optional embodiment, refer to Figures 3a-7b As shown, the adjustable noise-canceling earplug also includes a first tuning mesh 6. The various sound guiding structures include a through hole 21, a tuning mesh damping hole 22, and a blind hole 23. The diameter of the through hole 21 is larger than the diameter of the tuning mesh damping hole 22, and the diameter of the tuning mesh damping hole 22 is smaller than the width of the sound guiding channel 11.

[0063] The first tuning mesh 6 is disposed on the tuning mesh damping hole 22. A gradient noise reduction effect can be achieved by calibrating the mesh count of the first tuning mesh 6. First, a series of tuning mesh samples with different mesh counts are designed, and a standard sound testing environment is prepared, including noise sources of different frequencies and intensities. Professional sound testing equipment is used to record the noise reduction effect of each sample under different noise sources. The noise reduction effect of each sample is recorded and analyzed, including indicators such as noise reduction amount and frequency response curve. Based on the test results, the mesh count of the tuning mesh is adjusted to achieve the desired noise reduction gradient. Calibration of the mesh count allows the earphone's sound performance at different noise reduction levels to be more delicate and adjustable, meeting users' personalized needs for sound quality.

[0064] By rotating the adjustable center plate 2, the holes with different diameters and characteristics, such as the through hole 21, the tuning mesh damping hole 22, and the blind hole 23, can connect with the sound guiding channel 11, forming a multi-level noise reduction channel with different damping effects. The through hole 21 has a larger diameter, providing relatively transparent sound transmission; the tuning mesh damping hole 22 is provided with a first tuning mesh 6, which adjusts the sound through the damping effect of the mesh to achieve a moderate level of noise reduction; the blind hole 23 is not connected to the sound guiding channel 11 at all, forming a blind zone and achieving a higher noise reduction effect. This adjustable noise-canceling earphone achieves a multi-level noise reduction effect by introducing the first tuning mesh 6 and the design of multiple sound guiding structures.

[0065] This utility model uses the example of rotating the adjustable center plate 2 axially by moving the gear shift lever 20 to illustrate how to achieve noise-reduced gear shifting. When the gear shift lever 20 is in the initial position (refer to...), Figure 2a , Figure 3a When (as shown), the ratchet 13 falls into the first pair of ratchet grooves 241 of the ratchet spring 24 (refer to...). Figure 3a As shown), the through hole 21 on the adjustable middle plate 2 is aligned with the sound guide channel 11 on the earphone frame body 1 (refer to...). Figure 2b , Figure 3b As shown), the first noise reduction channel is formed; when the gear shift lever 20 is rotated 45° (refer to...), Figure 4a , Figure 5a As shown), the ratchet 13 falls into the second pair of ratchet grooves 241 of the ratchet spring 24, and the tuning mesh damping hole 22 on the adjustable middle plate 2 aligns with the sound guiding channel 11 on the earphone frame body 1 (see reference). Figure 4b , Figure 5b As shown), this forms the second noise reduction channel; when the gear shift lever 20 is rotated 90° (refer to...), Figure 6a , Figure 7a As shown), the ratchet 13 falls into the third pair of ratchet grooves 241 of the ratchet spring 24, and the blind hole 23 on the adjustable middle plate 2 aligns with the sound guide channel 11 on the earphone frame body 1 (see reference). Figure 6b , Figure 7bAs shown), this forms the third noise reduction channel.

[0066] The above three noise reduction channels are only an example. Those skilled in the art can change the number of noise reduction levels by setting the number of ratchet 13, ratchet groove 241, and sound guiding structure. No specific limitation is made here.

[0067] In an optional embodiment, refer to Figure 1 As shown, the adjustable noise-canceling earplugs also include an ear cap 9, which is located at the tail end of the earplug frame body 1. The ear cap 9 is detachably connected to the earplug frame body 1, making it easy to replace the ear cap 9. The ear cap 9 can be made of silicone, which has good softness and elasticity, and can conform to the shape of different users' ear canals, improving wearing comfort and sealing.

[0068] In an optional embodiment, refer to Figure 2b , Figure 3b , Figure 4b , Figure 5b , Figure 6b and Figure 7b As shown, the adjustable noise-canceling earplugs also include a first sealing element 4 and a second sealing element 5. The earplug cover 3 includes a rib plate 30, and the first sealing element 4 is disposed between the rib plate 30 and the adjustable middle plate 2. The first sealing element 4 is used to lock the adjustable middle plate 2, so that it is subjected to balanced force and produces a uniform damping feel when rotating, preventing it from loosening or shifting during use, and ensuring that the adjustable middle plate 2 can be accurately aligned with different noise-canceling levels when rotating, thereby improving the reliability and user experience of the earplugs.

[0069] The second sealing element 5 is positioned between the adjustable middle plate 2 and the entrance of the sound guide channel 11 to ensure absolute sealing and prevent sound leakage in the sound guide channel 11. These two sealing elements work together to effectively reduce air leakage inside the earplug, enhancing its sealing performance. This improved sealing directly improves the earplug's noise reduction effect, making it more difficult for external noise to penetrate the earplug and enter the user's ear. Furthermore, the presence of these two sealing elements reduces noise leakage caused by gaps between the earplug and the ear canal, allowing the user to enjoy a quieter environment while wearing the earplug. This environment helps the user relax and improves wearing comfort.

[0070] The first seal 4 and the second seal 5 mentioned above can be seals in the prior art, such as sealing rings.

[0071] In an optional embodiment, refer to Figure 3a , Figure 5a and Figure 7aAs shown, the adjustable middle plate 2 has a limiting rib 26 on the outer periphery of the first sealing member 4. The limiting rib 26 ensures the stability of the first sealing member 4 inside the earplug, preventing it from shifting or deforming during use, thereby maintaining a good seal between the earplug and the ear canal. Furthermore, the limiting rib 26 helps reduce air leakage caused by loosening or misalignment of the first sealing member 4, making it difficult for external noise to penetrate the earplug and enter the user's ear, further improving the noise reduction effect of the earplug. In addition, as part of the adjustable middle plate 2, the limiting rib 26 enhances the structural strength of the adjustable middle plate 2, making it more stable and reliable during rotation. This increased structural strength helps extend the lifespan of the earplug and reduce damage caused by long-term use.

[0072] In an optional embodiment, refer to Figure 2b As shown, the earplug cover 3 includes a central shaft 25, and the earplug skeleton body 1 is provided with a central shaft hole to accommodate the central shaft 25.

[0073] The earbud cover 3 and the earbud frame body 1 are pressed together by a tight-fitting structure between the central shaft 25 and the central shaft hole, and pre-applied with adhesive to ensure that they will not loosen after the adhesive dries. When assembling the earbud cover 3, the first sealing element 4 is pressed down with uniform force to ensure that the adjustable middle plate 2 and the earbud frame body 1 are tightly pressed together. By setting the first sealing element 4 to have an appropriate pre-pressure height, the force of the adjustable middle plate 2 during axial rotation can be ensured to be within a suitable range.

[0074] In an optional embodiment, refer to Figure 2b , Figure 3b , Figure 4b , Figure 5b , Figure 6b and Figure 7b As shown, the adjustable noise-canceling earplug also includes a second tuning mesh 8, which is disposed at the tail end of the noise-absorbing damping cavity 12. Through the combined action of the noise-absorbing damping element 7 and the second tuning mesh 8, a multi-layered noise reduction mechanism is formed. The noise-absorbing damping element 7 can absorb and dissipate some noise, while the second tuning mesh 8 further filters and dampens the noise, thereby effectively improving the overall noise reduction effect of the earplug.

[0075] By adjusting parameters such as the mesh count, material, and structure of the second tuning mesh 8, the noise reduction effect of the earbuds in specific frequency bands can be made more significant, which helps to reduce the interference of noise at specific frequencies to users and improve wearing comfort.

[0076] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. This invention is not limited to any single aspect, nor to any single embodiment, nor to any combination and / or substitution of these aspects and / or embodiments. Each aspect and / or embodiment of this invention can be used alone, or in combination with one or more other aspects and / or other embodiments.

[0077] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, 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, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An adjustable noise-canceling earplug, characterized in that, include: Earbud frame body (1), adjustable middle plate (2) and earbud top cover (3); The earplug cover (3) is fixedly connected to the earplug skeleton body (1); The adjustable middle plate (2) is coaxially assembled with the earplug frame body (1); The outer edge of the adjustable middle plate (2) abuts against the earplug top cover (3) and the earplug skeleton body (1) respectively; The earplug skeleton body (1) is provided with a sound guiding channel (11) and a sound damping cavity (12). The sound damping cavity (12) is connected to the sound guiding channel (11). A sound damping component (7) is provided in the sound damping cavity (12). The adjustable middle plate (2) has an air inlet (27) on its outer wall. The adjustable middle plate (2) has a variety of sound guiding structures arranged circumferentially. The adjustable middle plate (2) can be rotated axially to connect the corresponding sound guiding structure with the sound guiding channel (11) to form a noise reduction channel with multiple levels of different damping effects.

2. The adjustable noise-canceling earplug according to claim 1, characterized in that, The earplug skeleton body (1) includes a pivot (10), and the outer periphery of the pivot is provided with ratchet teeth (13); The adjustable disc (2) is provided with a ratchet spring (24) along its inner circumference. The ratchet spring (24) includes multiple pairs of ratchet grooves (241) that match the shape of the ratchet (13).

3. The adjustable noise-canceling earplug according to claim 1, characterized in that, The earbud frame body (1) is provided with a limit stop (14) on the side facing the adjustable middle plate (2), and the bottom of the adjustable middle plate (2) is provided with a limit groove corresponding to the position of the limit stop (14).

4. The adjustable noise-canceling earplug according to claim 1, characterized in that, It also includes the first tuning mesh (6); The various sound guiding structures include a through hole (21), a tuning mesh damping hole (22), and a blind hole (23). The diameter of the through hole (21) is larger than the diameter of the tuning mesh damping hole (22), and the diameter of the tuning mesh damping hole (22) is smaller than the width of the sound guiding channel (11). The first tuning mesh (6) is disposed on the tuning mesh damping hole (22); When the adjustable center plate (2) rotates axially, the through hole (21), the damping hole (22) of the tuning mesh and the blind hole (23) can be connected with the sound guide channel (11) to form a noise reduction channel with multiple levels of different damping effects.

5. The adjustable noise-canceling earplug according to claim 1, characterized in that, The adjustable plate (2) is provided with a gear shifting handle (20) along its outer periphery.

6. The adjustable noise-canceling earplug according to claim 1, characterized in that, It also includes an ear cap (9), which is disposed at the tail end of the earplug skeleton body (1).

7. The adjustable noise-canceling earplug according to claim 1, characterized in that, It also includes a first seal (4) and a second seal (5); The earplug cover (3) includes a rib (30), and the first seal (4) is disposed between the rib (30) and the adjustable center plate (2); The second seal (5) is located between the adjustable center plate (2) and the entrance of the sound guide channel (11).

8. The adjustable noise-canceling earplug according to claim 7, characterized in that, The adjustable middle plate (2) has a limiting rib (26) on the outer periphery of the first seal (4).

9. The adjustable noise-canceling earplug according to claim 1, characterized in that, It also includes a second tuning mesh (8); The second tuning mesh (8) is disposed at the tail end of the sound-absorbing damping cavity (12).

10. The adjustable noise-canceling earplug according to claim 7, characterized in that, The earplug cover (3) includes a central shaft (25), and the earplug skeleton body (1) is provided with a central shaft hole to accommodate the central shaft (25).

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