Earplug with adjustable noise reduction performance

Abstract

The invention discloses an earplug capable of adjusting noise reduction performance. The earplug comprises an earplug body and a plug head used for being plugged into an ear canal. The earplug main body is provided with a mounting cavity and a sound outlet communicated with the mounting cavity, the plug head is mounted at the sound outlet, and a sound inlet gap is formed in the earplug main body and used for enabling sound in the environment to enter the mounting cavity; the earplug main body is provided with a noise reduction adjusting structure, and the noise reduction adjusting structure is used for partially or completely sealing a channel between the mounting cavity and the sound outlet; the noise reduction adjusting structure is provided with at least three gears, and under the first gear, a channel between the mounting cavity and the sound outlet is completely closed; in the second gear, the channel between the mounting cavity and the sound outlet is completely opened or partially opened; under other gears, a channel between the mounting cavity and the sound outlet is partially opened, and the opening degree is between the first gear and the second gear.

Description

Technical Field

[0001] This invention relates to the technical field of earplugs, and more specifically, to an earplug with adjustable noise reduction performance. Background Technology

[0002] Noise-canceling earplugs, also known as sound-isolating earplugs, are personal protective devices based on the principle of physical sound insulation. They block noise transmission by sealing the ear canal or absorbing sound waves, thereby reducing the perceived intensity of ambient noise. These products are widely used in various scenarios such as industrial manufacturing, construction, studying / working, and sleeping, providing effective noise isolation for users in noisy environments. In daily life, people are often more sensitive to external noise during commutes, concerts, social parties, focused work, and nighttime sleep, thus creating a strong demand for efficient and convenient noise-canceling earplugs. Typically, high-quality noise-canceling earplugs can achieve a noise reduction of approximately 15 to 30 decibels, significantly reducing the interference of noise on hearing and psychology, thereby improving the user's comfort and concentration in various noisy environments.

[0003] However, most noise-canceling earbuds currently on the market only support direct switching between noise-canceling and all-through modes, lacking intermediate adjustment options. Because they cannot flexibly adjust the level of noise cancellation, users' needs in various scenarios are often not fully met. For example, when noise cancellation is turned on, ambient sound is heavily blocked, hindering normal communication; while when noise cancellation is turned off, external noise completely floods in, affecting concentration or rest. This black-and-white design limits the practicality and user experience of earbuds, urgently requiring technological improvements to achieve a more refined and adjustable noise cancellation effect. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an earplug with adjustable noise cancellation performance, thereby solving the problem that existing noise-canceling earplugs cannot adjust their noise cancellation capabilities.

[0005] This invention discloses an earplug with adjustable noise reduction performance, comprising an earplug body and a plug tip for insertion into the ear canal; the earplug body has an installation cavity and a sound outlet communicating with the installation cavity, the plug tip is installed at the sound outlet, and the earplug body is provided with a sound inlet gap for allowing ambient sound to enter the installation cavity; the earplug body is provided with a noise reduction adjustment structure, which is used to partially or completely close the channel between the installation cavity and the sound outlet; the noise reduction adjustment structure is provided with at least three settings: in the first setting, the channel between the installation cavity and the sound outlet is completely closed; in the second setting, the channel between the installation cavity and the sound outlet is completely or partially open; in other settings, the channel between the installation cavity and the sound outlet is partially open, and the degree of opening is between the first setting and the second setting.

[0006] Furthermore, the earbud body includes a bottom shell and a cover connected to each other, the cover being fastened to the bottom shell to form the mounting cavity; the bottom shell includes a base and a connecting seat connected to each other, the connecting seat having a hollow sound channel communicating with the mounting cavity, and having an outlet outside the mounting cavity, the outlet being the sound outlet.

[0007] Furthermore, a sealing sleeve is installed at the opening of the sound channel within the mounting cavity. The sealing sleeve is used to seal the opening of the sound channel, and a connecting channel is provided on the sealing sleeve to connect the sound channel with the mounting cavity.

[0008] Furthermore, the noise reduction adjustment structure includes an adjustment switch mounted on the cover and a pulsator plate mounted in the mounting cavity. The adjustment switch is used to control the movement of the pulsator plate. The sealing sleeve abuts against the pulsator plate so that the opening of the connecting channel is tightly against the pulsator plate. The pulsator plate is provided with a plurality of sound inlet holes of different diameters, and the pulsator plate has a full noise reduction zone. When the pulsator plate is in different positions, the sound inlet holes of different diameters can be respectively aligned with the opening of the connecting channel, or the full noise reduction zone can be aligned with the connecting channel.

[0009] Furthermore, the impeller plate is rotatably mounted within the mounting cavity, and the adjustment switch is used to control the rotation of the impeller plate to switch between at least three gear positions. When the impeller plate is rotated to the first gear position, the connecting channel corresponds to the full noise reduction zone; when the impeller plate is rotated to the second gear position, the connecting channel corresponds to the sound inlet hole with the largest aperture; when the impeller plate is rotated to other gear positions, the connecting channel corresponds to sound inlets with other apertures.

[0010] Furthermore, the impeller plate is provided with an elastic block, and the cover is provided with a gear setting seat. The gear setting seat has a gear setting groove for accommodating the elastic block. When the impeller plate rotates to different gears, the elastic block is respectively accommodated in different gear setting grooves.

[0011] Furthermore, the impeller plate has two sound inlets with different diameters, and the gear setting seat has three gear setting slots, including a first gear slot, a second gear slot, and a third gear slot. When the connecting channel corresponds to the full noise reduction zone, the elastic block is located in the first gear slot; when the connecting channel corresponds to the small-diameter sound inlet, the elastic block is located in the second gear slot; and when the connecting channel corresponds to the large-diameter sound inlet, the elastic block is located in the third gear slot.

[0012] Furthermore, the sound channel is provided with a receiving groove at the opening in the mounting cavity, and the sealing sleeve is fitted into the receiving groove.

[0013] Furthermore, the sealing sleeve is provided with a flange at the opening of the connecting channel, the flange being away from the sound channel and abutting against the impeller plate.

[0014] Furthermore, the base has a mounting surface facing the cover, and a plurality of lower support blocks are provided on the mounting surface. The cover has a lower cover edge facing the base, and a plurality of upper support blocks are provided on the lower cover edge. When the cover and the base are assembled, each of the lower support blocks abuts against one of the upper support blocks, thereby forming the sound inlet gap between the base and the cover.

[0015] The present invention has the following beneficial effects: By setting the noise reduction adjustment structure to at least three different levels, the user can partially or completely close the channel between the mounting cavity and the sound outlet. This allows the earphone to be adjusted in multiple levels between full noise reduction and the lowest noise reduction level, so that the earphone can adapt to the user's needs in different usage environments and solves the problem that existing earphones cannot adjust the noise reduction capability. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is an exploded view of Example 1, from a first-person perspective; Figure 3This is an exploded view of Example 1, from a second perspective; Figure 4 This is a cross-sectional view of Example 1.

[0017] Explanation of reference numerals in the attached figures: 100. Earbud body; 1001. Mounting cavity; 1002. Sound inlet gap; 1. Bottom shell; 11. Base; 12. Connecting seat; 121. Sound channel; 122. Receiving groove; 123. Snap-fit ​​ring; 124. Sound outlet; 13. Sealing sleeve; 131. Connecting channel; 132. Flange; 14. Connecting pin; 15. Positioning pin; 16. Positioning insert plate; 17. Assembly surface; 171. Lower support block; 18. Gear position indicator; 2. Cover; 201. Upper cover surface; 202. Lower cover surface; 203. Lower cover edge; 21. Mounting groove; 211. Guide arc surface; 22. Guide hole; 23. Gear setting seat; 230. Positioning plate groove; 231. Gear setting groove; 2311. First gear groove; 2312. Second gear groove; 2313. Third gear groove; 24. Upper support block; 25. Connecting sleeve; 26. Positioning hole; 3. Adjusting switch; 31. Sliding block; 311. Inner arc surface; 312. Mating surface; 32. Actuating protrusion; 33. Actuating lever; 4. Impeller plate; 401. Upper plate surface; 402. Lower plate surface; 41. Rotating seat; 411. Rotating hole; 42. Toggle seat; 421. Insertion hole; 43. Sound inlet hole; 44. Full noise reduction zone; 45. Feedback hole; 451. Elastic rod; 46. Elastic block; 200, plug; 210, plug hole; 2101, plug face; 2102, mating groove. Detailed Implementation

[0018] To further understand the content, features, and effects of this invention, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings: Example 1

[0019] Reference Figure 1-4 This embodiment discloses an earplug with adjustable noise reduction performance, including an earplug body 100 and a plug 200 installed on the earplug body 100. When the user uses it, the plug 200 is inserted into the ear canal. External sound first enters the earplug body 100, then enters the plug 200 from the earplug body 100, and then enters the external auditory canal of the human body from the plug 200, and is then perceived by the human body. The earplug body 100 is provided with a noise reduction adjustment structure that can adjust the noise reduction capability. Through this noise reduction adjustment structure, the noise reduction capability of the earplug can be changed, thereby meeting the user's usage needs in different environments.

[0020] The earbud body 100 includes a detachable bottom shell 1 and a cover 2. The bottom shell 1 has a circular opening for engaging with the cover 2. Similarly, the cover 2 has a circular opening for engaging with the bottom shell 1. When the two are combined through their respective openings, they form a cavity 1001 with a hollow structure, which provides space for the installation of the component. Specifically, the bottom shell 1 includes an integrally connected base 11 and a connecting seat 12. The connecting seat 12 is a hollow rod-shaped structure with openings at both ends. One end is connected to the mounting cavity 1001 inside the base 11, and the other end faces the outside of the base 11. The hollow channel inside the connecting seat 12 is a sound channel 121, and the opening at the end of the connecting seat 12 facing the outside of the base 11 is a sound outlet 124. The sound channel 121 and the sound outlet 124 enable the outside of the earphone body 100 to be connected to the inside of the mounting cavity 1001. When the earphone performs noise reduction, the ambient sound enters the mounting cavity 1001 and, through the noise reduction structure, reaches the sound outlet 124 via the sound channel 121. In addition, the part of the connector 12 located outside the base 11 is connected to the ear tip 200. After the sound is transmitted from the sound outlet 124, it reaches the ear tip 200 and then enters the ear canal. The part of the connector 12 located outside the base 11 is provided with several protruding locking rings 123, which are used to lock the ear tip 200. The ear tip 200 has a spherical plug surface 2101 for insertion into the ear canal. At the central axis of the plug surface 2101 is a plug hole 210 that penetrates the ear tip 200. The connector 12 is inserted into the plug hole 210, and the inner wall of the plug hole 210 is provided with a mating groove 2102 for accommodating the locking ring 123. When the connector 12 is inserted into the plug hole 210, the locking ring 123 is accommodated in the mating groove 2102, which can prevent the ear tip 200 from falling off the connector 12 to a certain extent, thereby realizing the detachable connection between the ear tip 200 and the connector 12.

[0021] The connector 12 has a receiving groove 122 at the opening inside the mounting cavity 1001. The receiving groove 122 is a groove structure with sidewalls. The opening of the connector 12 leading to the mounting cavity 1001 is located in the receiving groove 122. A sealing sleeve 13 is embedded in the receiving groove 122 to seal the opening of the connector 12, so that sound can only enter the sound channel 121 through the sealing sleeve 13. In this embodiment, the sealing sleeve 13 is made of elastic material. A connecting channel 131 is opened in the middle of the sealing sleeve 13. The connecting channel 131 is a circular through hole. The connecting channel 131 corresponds to the sound channel 121, so that sound can enter the sound channel 121 through the connecting channel 131. In addition, a flange 132 is provided on the side of the sealing sleeve 13 away from the sound channel 121. The flange 132 is located at the edge of the opening of the connecting channel 131. The flange 132 is a raised structure on the surface of the sealing sleeve 13, which is used to abut and cooperate with other components to achieve the function of noise reduction adjustment.

[0022] The cover 2 has a disc-shaped structure with an upper cover surface 201 and a lower cover surface 202. When the cover 2 is connected to the bottom shell 1, the upper cover surface 201 faces away from the bottom shell 1, while the lower cover surface 202 faces the bottom shell 1. An installation groove 21 is provided on the upper cover surface 201. The installation groove 21 is an arc-shaped groove extending along the edge of the upper cover surface 201 for mounting the adjustment switch 3. The inner side of the installation groove 21 relative to the edge of the upper cover surface 201 is a guide arc surface 211 for cooperating with the adjustment switch 3. An arc-shaped guide hole 22 is provided at the bottom of the installation groove 21, which penetrates the cover 2 and defines the position of the adjustment switch 3. An adjustment switch 3 is disposed in the installation groove 21. The adjustment switch 3 includes an arc-shaped sliding block 31, which is slidably mounted in the installation groove 21 along an arc path. The sliding block 31 has an inner arc surface 311. The inner arc surface 311 has the same curvature as the guide arc surface 211 and slides in cooperation with the guide arc surface 211. When the sliding block 31 slides in the mounting groove 21, the inner arc surface 311 always remains in contact with the guide arc surface 211. In addition, the sliding block 31 has a mating surface 312, which is in contact with the bottom surface of the mounting groove 21 and can slide relative to the bottom surface of the mounting groove 21 along the arc path of the mounting groove 21. A toggle rod 33 is fixedly installed on the mating surface 312. The toggle rod 33 passes through the guide hole 22 and extends into the interior of the mounting cavity 1001. When the adjusting switch 3 slides in the mounting groove 21, the toggle rod 33 can move as far as the two ends of the guide hole 22, and is stopped by the ends of the guide hole 22. Thus, the guide hole 22 can limit the extreme position of the toggle rod 33, thereby limiting the range of movement of the adjusting switch 3. A toggle protrusion 32 is provided on the sliding block 31 away from the upper cover surface 201. The toggle protrusion 32 is a raised structure on the surface of the sliding block 31. By applying force to the toggle protrusion 32, the user can slide the entire adjustment switch 3 in the mounting groove 21, so that the toggle lever 33 can drive the noise reduction structure components in the mounting cavity 1001 to move, thereby achieving the purpose of adjusting the noise reduction capability.

[0023] To allow sound to enter the mounting cavity 1001, a mounting surface 17 is provided on the edge of the opening of the base 11 facing the cover 2. The mounting surface 17 is an annular plane, and multiple lower support blocks 171 are evenly spaced along the annular path of the mounting surface 17. The lower support blocks 171 are sheet-like protruding structures used to support the cover 2. Correspondingly, the edge of the lower cover surface 202 of the cover 2 is a lower cover edge 203, which is an annular plane, and multiple upper support blocks are evenly spaced along the annular path of the lower cover edge 203. The upper support block 24 is a sheet-like protruding structure used to support the base 11. When the cover 2 is placed on the base 11, each upper support block 24 abuts against a lower support block 171, so that multiple sound inlet gaps 1002 are formed between the mounting surface 17 of the base 11 and the lower edge 203 of the cover 2 for sound to enter. After the external sound enters the mounting cavity 1001 through the sound inlet gap 1002, it is then transmitted from the sound outlet 124 through the sound channel 121 after the noise reduction structure is applied.

[0024] To achieve the installation connection between the cover 2 and the base shell 1, a connecting pin 14 is provided on the base 11. The connecting pin 14 is a circular rod-shaped structure located in the mounting cavity 1001. One end of the connecting pin 14 is fixed to the base 11, and the other end extends towards the cover 2. Correspondingly, a cylindrical connecting sleeve 25 is provided on the cover 2. One end of the connecting sleeve 25 is fixed to the lower cover surface 202 of the cover 2, and the other end faces the base 11 and has an opening. The opening of the connecting sleeve 25 corresponds to the connecting pin 14. When the cover 2 and the base 11 are assembled, the connecting pin 14 is inserted into the connecting sleeve 25. The connecting pin 14 and the inner wall of the connecting sleeve 25 are interference fit, which allows the cover 2 to be firmly fastened to the base 11, maintaining a detachable connection. In addition, the base 11 is provided with There are several positioning pins 15, and the cover 2 is provided with several positioning holes 26 for the insertion of the positioning pins 15. The positioning holes 26 are blind holes. When the cover 2 and the base 11 are combined, each positioning pin 15 has a corresponding positioning hole 26, and each positioning pin 15 is inserted into a corresponding positioning hole 26. This allows the cover 2 and the base 11 to be correctly positioned, ensuring the accuracy of the positional relationship between the cover 2 and the base 11 during installation. In addition, the base 11 is provided with a positioning insert plate 16, and the cover 2 is provided with a corresponding positioning plate groove 230 for the positioning insert plate 16 to be inserted. When the cover 2 and the base 11 are combined, the positioning insert plate 16 is inserted into the positioning plate groove 230, which further ensures the accuracy of the positional relationship between the cover 2 and the base 11 and the tightness of the connection.

[0025] To adjust the noise reduction capability of the earplugs, a pulsator plate 4 is provided inside the mounting cavity 1001. The pulsator plate 4 has a rotating seat 41 with a rotating hole 411. The rotating hole 411 is a circular through hole. The connecting pin 14 on the base 11 and the connecting sleeve 25 on the cover 2 both pass through the rotating hole 411. This allows the pulsator plate 4 to be rotatably mounted in the mounting cavity 1001 with the central axis of the connecting pin 14 and the connecting sleeve 25 as the rotation center. The surface of the pulsator plate 4 facing the cover 2 is the upper plate surface 401, and the surface of the pulsator plate 4 facing the base 11 is the lower plate surface 402. A toggle seat 42 is provided on the edge of the upper plate surface 401. The toggle seat 42 has an insertion hole 421 for the toggle lever 33 of the adjustment switch 3 to be inserted. The toggle seat 42 corresponds to the guide hole 22 of the mounting groove 21. When the adjustment switch 3 is installed on the cover 2, the toggle lever 33 passes through the guide hole 22. After passing through the guide hole 22 at the bottom of the mounting groove 21, its end is inserted into the aforementioned insertion hole 421. When the user applies force to the adjustment switch 3, causing the adjustment switch 3 to slide along an arc-shaped path within the mounting groove 21, the toggle lever 33 can transmit the rotational power to the impeller plate 4 via the toggle seat 42, thereby driving the impeller plate 4 to rotate. The impeller plate 4 has several sound inlet holes 43, all of which are round holes. Multiple sound inlet holes 43 are arranged along the arc-shaped path of the impeller plate 4's rotation, and the diameter of adjacent sound inlet holes 43 increases or decreases sequentially. Each sound inlet hole 43 has a position on the rotation path of the impeller plate 4 that corresponds to the receiving groove 122. Thus, when the impeller plate 4 rotates to the position where the sound inlet hole 43 corresponds to the receiving groove 122, the ambient sound will first enter the mounting cavity 1001 from the sound inlet gap 1002, then enter the receiving groove 122 through the sound inlet hole 43, and finally enter the sound channel 121.

[0026] The number of sound inlets 43 can be set according to the needs of noise reduction adjustment levels. For example, when multiple levels of adjustment are required, five sound inlets 43 can be set. The smaller the aperture, the higher the noise reduction level. In this embodiment, there are two sound inlets 43 with different aperture sizes. The flange 132 of the sealing sleeve 13 abuts against the lower plate surface 402 of the impeller plate 4. Under the sealing effect of the sealing sleeve 13, the sound waves can be transmitted to the sound channel 121 through the connecting channel 131 to the maximum extent, reducing the amount of excess sound waves that directly enter from the mounting cavity 1001. The probability of sound channel 121; and the rotation of the impeller plate 4 to different positions can make the connecting channel 131 correspond to the sound inlet holes 43 of different diameters. The sound wave needs to enter the connecting channel 131 of the sealing sleeve 13 through the sound inlet hole 43. Since the sound inlet holes 43 of different sizes can weaken the sound wave to different degrees, when it is necessary to set different levels of noise reduction effect, it is only necessary to drive the impeller plate 4 to rotate by adjusting the switch 3, so that the corresponding size of the sound inlet hole 43 is rotated to the position corresponding to the connecting channel 131, and different levels of noise reduction function can be achieved.

[0027] To achieve complete noise reduction, a full noise reduction zone 44 is pre-set on the impeller plate 4. The full noise reduction zone 44 is arranged along an arc-shaped path of multiple sound inlets 43 and is adjacent to the outermost sound inlet 43. Within the full noise reduction zone 44, the impeller plate 4 is a closed structure. When the impeller plate 4 rotates to make the full noise reduction zone 44 rotate to the position corresponding to the connecting channel 131, the flange 132 of the sealing sleeve 13 directly abuts against the lower plate surface 402 of the impeller plate 4. The impeller plate 4 completely seals the connecting channel 131 of the sealing sleeve 13, and sound waves can hardly enter the sound channel 121 through the connecting channel 131. Thus, when the impeller plate 4 rotates to make the full noise reduction zone 44 correspond to the connecting channel 131, the function of complete noise reduction can be achieved.

[0028] To facilitate easier setting of the noise cancellation level of the earbuds, an elastic block 46 is provided on the pulsator plate 4. The elastic block 46 is located at the edge of the pulsator plate 4 and can undergo elastic deformation under external force. Correspondingly, a level setting seat 23 is integrally provided on the lower cover surface 202 of the cover 2. The level setting seat 23 is located on the outer edge of the pulsator plate 4 and has multiple level setting slots 231 for accommodating the elastic block 46. The number of slots 231 is one more than the number of sound inlets 43. The slot 231 is a recess with its opening facing the impeller plate 4. All slots 231 are arranged on the rotation path of the elastic block 46. When the elastic block 46 is accommodated in a slot 231, the impeller plate 4 is positioned so that a sound inlet 43 or the full noise reduction zone 44 corresponds to the connecting channel 131. Thus, each time the elastic block 46 enters a slot 231, it corresponds to a noise reduction level. In this embodiment, three gear setting slots 231 are provided, including a first gear slot 2311, a second gear slot 2312, and a third gear slot 2313. When the elastic block 46 enters the first gear slot 2311, the full noise reduction zone 44 corresponds to the connecting channel 131; when the elastic block 46 enters the second gear slot 2312, the sound inlet 43 near the full noise reduction zone 44 corresponds to the connecting channel 131; when the elastic block 46 enters the third gear slot 2313, it moves away from the full noise reduction zone 44. The sound inlet 43 corresponds to the connecting channel 131. The diameter of the sound inlet 43 is larger than that of the other sound inlet 43. Thus, when the user changes the position of the impeller plate 4 by adjusting the switch 3, he only needs to make the elastic block 46 enter different gear setting slots 231 to set the noise reduction level. Since the elastic block 46 can undergo elastic deformation, it will generate vibration feedback when it enters the gear setting slot 231, so that the user can perceive the gear setting and improve the user experience.

[0029] To further enhance the vibration feedback when users set the noise reduction level, a feedback hole 45 is provided at the edge of the impeller plate 4 near the elastic block 46. The feedback hole 45 has a triangular hollow structure, which on the one hand makes the overall structure of the impeller plate 4 lighter, and on the other hand forms an elastic rod 451 at the edge of the impeller plate 4. The elastic rod 451 is only connected to the main body of the impeller plate 4 at both ends, so it is easy to undergo elastic deformation. The aforementioned elastic block 46 is integrally set in the middle of the elastic rod 451. When the elastic block 46 deforms, the elastic rod 451 can amplify the vibration amplitude caused by the elastic deformation. This allows users to more intuitively feel the vibration caused by the elastic block 46 entering the gear setting slot 231. Vibration feedback; In addition, in order to allow users to intuitively feel which noise cancellation level the earbuds are set to, several level markings 18 are provided on the surface of the base 11 away from the cover 2. The level markings 18 are set in positions corresponding to the adjustment switch 3. The number of level markings 18 is one more than the number of sound inlets 43. Each time the user moves the adjustment switch 3, causing the elastic block 46 on the pulsator plate 4 to enter a level setting slot 231, exactly one level marking 18 corresponds to the center position of the adjustment switch 3. By corresponding each level marking 18 with the position of the pulsator plate 4 and by reasonably setting the pattern or shape of each level marking 18, the user can intuitively judge the set noise cancellation level.

[0030] The implementation principle and beneficial effects of this embodiment are as follows: The user can rotate the impeller plate 4 by toggling the adjustment switch 3 and the lever 33. When the impeller plate 4 rotates, the elastic block 46 can enter different gear setting slots 231. When the elastic block 46 is accommodated in a certain gear setting slot 231, there is always a sound inlet hole 43 or a full noise reduction zone 44 on the impeller plate 4 corresponding to the connection channel 131 of the sealing sleeve 13. When the sound inlet holes 43 of different diameters correspond to the connection channel 131, the ambient sound enters the mounting cavity 1001 through the sound inlet gap 1002, and then enters the connection channel 131 through the sound inlet hole 43. The sound then travels through the sound channel 121 to the sound outlet 124. The sound inlet holes 43 of different diameters have different attenuation capabilities for sound waves. Therefore, the user can change the noise reduction capability of the earphone by toggling the adjustment switch 3. When the user toggles the adjustment switch 3 so that the full noise reduction zone 44 corresponds to the connection channel 131, the connection channel 131 will be completely closed, thereby achieving the function of full noise reduction. Therefore, the earphone in this embodiment can be adjusted in multiple levels between full noise reduction and the lowest noise reduction level, so that the earphone can adapt to the user's needs in different usage environments, thereby solving the problem that existing earphones cannot adjust the noise reduction capability.

[0031] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An earplug with adjustable noise reduction performance, characterized in that, Includes the earplug body and the tip for inserting into the ear canal; The earplug body has a mounting cavity and a sound outlet communicating with the mounting cavity. The earplug head is installed at the sound outlet. The earplug body is provided with a sound inlet gap to allow ambient sound to enter the mounting cavity. The earplug body is provided with a noise reduction adjustment structure, which is used to partially or completely close the channel between the mounting cavity and the sound outlet; The noise reduction adjustment structure has at least three settings. In the first setting, the channel between the mounting cavity and the sound outlet is completely closed. In the second setting, the channel between the mounting cavity and the sound outlet is fully or partially opened. In other settings, the channel between the mounting cavity and the sound outlet is partially opened, and the degree of opening is between the first setting and the second setting.

2. The earplug with adjustable noise reduction performance according to claim 1, characterized in that, The earbud body includes a bottom shell and a cover connected to each other, and the cover is fastened onto the bottom shell to form the mounting cavity; The bottom shell includes a base and a connecting seat that are connected to each other. The connecting seat has a hollow sound channel that communicates with the mounting cavity and has an outlet outside the mounting cavity, which is the sound outlet.

3. The earplug with adjustable noise reduction performance according to claim 2, characterized in that, A sealing sleeve is installed at the opening of the sound channel within the mounting cavity. The sealing sleeve is used to seal the opening of the sound channel. A connecting channel is provided on the sealing sleeve to connect the sound channel with the mounting cavity.

4. The earplug with adjustable noise reduction performance according to claim 3, characterized in that, The noise reduction adjustment structure includes an adjustment switch mounted on the cover and a pulsator plate mounted in the mounting cavity. The adjustment switch is used to control the movement of the pulsator plate, and the sealing sleeve abuts against the pulsator plate so that the opening of the connecting channel is tightly against the pulsator plate. The impeller plate is provided with a number of sound inlet holes of different diameters, and the impeller plate has a full noise reduction zone. The impeller plate is positioned in different positions so that the sound inlet holes of different diameters correspond to the openings of the connecting channel, or so that the full noise reduction zone corresponds to the connecting channel.

5. The earplug with adjustable noise reduction performance according to claim 4, characterized in that, The impeller plate is rotatably mounted in the mounting cavity. The adjustment switch is used to control the rotation of the impeller plate to switch between at least three gear positions. When the impeller plate is rotated to the first gear position, the connecting channel corresponds to the full noise reduction zone. When the impeller plate is rotated to the second gear position, the connecting channel corresponds to the sound inlet hole with the largest aperture. When the impeller plate is rotated to other gear positions, the connecting channel corresponds to the sound inlet holes with other apertures.

6. The earplug with adjustable noise reduction performance according to claim 5, characterized in that, An elastic block is provided on the impeller plate, and a gear setting seat is provided on the cover. The gear setting seat has a gear setting groove for accommodating the elastic block. When the impeller plate rotates to different gears, the elastic block is respectively accommodated in different gear setting grooves.

7. The earplug with adjustable noise reduction performance according to claim 6, characterized in that, The impeller plate has two sound inlets with different diameters, and the gear setting seat has three gear setting slots, including a first gear slot, a second gear slot, and a third gear slot. When the connecting channel corresponds to the full noise reduction zone, the elastic block is located in the first gear slot; when the connecting channel corresponds to the small-diameter sound inlet, the elastic block is located in the second gear slot; and when the connecting channel corresponds to the large-diameter sound inlet, the elastic block is located in the third gear slot.

8. The earplug with adjustable noise reduction performance according to any one of claims 3-7, characterized in that, The sound channel is provided with a receiving groove at the opening in the mounting cavity, and the sealing sleeve is fitted into the receiving groove.

9. The earplug with adjustable noise reduction performance according to any one of claims 3-7, characterized in that, The sealing sleeve has a flange at the opening of the connection channel, the flange is away from the sound channel, and the flange abuts against the impeller plate.

10. The earplug with adjustable noise reduction performance according to any one of claims 2-7, characterized in that, The base has a mounting surface facing the cover, and a plurality of lower support blocks are provided on the mounting surface. The cover has a lower cover edge facing the base, and a plurality of upper support blocks are provided on the lower cover edge. When the cover and the base are assembled, each of the lower support blocks abuts against one of the upper support blocks, thereby forming the sound inlet gap between the base and the cover.

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