Bluetooth earphone
By setting up multi-section folding sound insulation cotton and deflectors in Bluetooth headphones, the folding and expansion of sound insulation cotton is controlled by using wind noise sensors and micro motors, the problem of poor wind noise and heat dissipation during movement is solved, and adaptive noise reduction and heat dissipation effect under different wind conditions is achieved, improving the user experience and life.
Patent Information
- Application Number
- CN202510323914.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2025-07-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Bluetooth headphones are affected by poor wind noise and heat dissipation during high load exercises, which affects their user experience and life.
Multi-section folded sound insulation cotton and flow guide plate are installed in the headphones. The folding and expansion of the sound insulation cotton is controlled through wind noise sensors and micro motors. The noise reduction and heat dissipation modes are switched according to the airflow intensity, and the airflow guide plate and arc-shaped flow guide portion are used to achieve airflow guidance and heat dissipation.
Switching the noise reduction mode in strong wind conditions reduces the impact of noise, switching the heat dissipation mode in weak wind conditions extends service life, improving the experience during exercise and the durability of the headphones.
Smart Images
Figure CN120302204A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of Bluetooth headsets, and particularly to a Bluetooth headset. Background Art
[0002] A Bluetooth headset is a wireless short-distance communication audio device. Depending on the supported version, a Bluetooth headset can be paired and connected to devices such as mobile phones, computers, and tablets via Bluetooth technology to provide functions such as playing, calling, and voice assistants. Some Bluetooth headsets also feature surround or stereo sound effects to enhance the user experience. Common Bluetooth headsets adopt a truly wireless connection method, which consists of an ear hook and a headset body. When in use, the ear hook is hung on the ear, causing the headset body to automatically fit into the ear canal. During exercise, it can be worn on the body without falling off. Due to the in-ear wearing method, it can closely fit the ear canal and physically isolate noise.
[0003] However, during high-intensity exercise (such as running and cycling), wind resistance is generated on the windward side of the Bluetooth headset. When combined with the ear structure, wind noise will be generated on the Bluetooth headset. Solving this technical problem by adding a windproof cover to the headset shell will affect the experience effect. Manually adjusting the headset position and increasing the headset volume will make it inconvenient to use and affect normal exercise. And completely blocking noise will result in poor heat dissipation and affect its service life. Summary of the Invention
[0004] To solve the above problems, the present invention provides the following technical solutions:
[0005] A Bluetooth headset includes a headset shell. The headset shell is provided with an integrated circuit board, and the integrated circuit board at least includes a Bluetooth module, a wind noise sensor, and a microcontroller. A connecting frame is provided inside the headset shell, and a micro motor is installed on the connecting frame. A first air inlet is opened at the outer end of the headset shell. A flow guide plate is provided inside the headset shell near the first air inlet. Sound insulation cotton is provided inside the headset shell. The sound insulation cotton is a multi-section folded plate. One folded end of the sound insulation cotton is close to the flow guide plate, and the other folded end of the sound insulation cotton is connected to the power output shaft of the micro motor. The sensing end of the wind noise sensor abuts against the flow guide plate. The flow guide plate is flexibly connected to the headset shell. The Bluetooth module is wirelessly connected to a terminal device and controls the volume control module on the terminal device through matching by the microcontroller. The wind noise sensor is electrically connected to the microcontroller and controls the rotation of the micro motor through the microcontroller. The rotation of the micro motor shaft drives the folding and expansion of the sound insulation cotton. A second air inlet is opened on the flow guide plate, and a third air inlet is provided on each folded section of the sound insulation cotton.
[0006] As a further preference, the opening position of the second air inlet hole is higher than that of the third air inlet hole. The opening position of the third air inlet hole on each folding section of the sound insulation cotton gradually becomes higher in the direction of the flow guide plate. After each folding section of the sound insulation cotton is folded towards the side of the flow guide plate, the second air inlet hole and the third air inlet hole are covered. After each folding section of the sound insulation cotton expands towards the side away from the flow guide plate, the second air inlet hole and the third air inlet hole are opened.
[0007] As a further preference, the edge of the flow guide plate is connected to the cavity wall of the earphone housing, and the edge of each folding section of the sound insulation cotton is in sliding contact with the cavity wall of the earphone housing.
[0008] As a further preference, the flow guide plate is wavy. The first air inlet hole is located outside and above the flow guide plate. The setting of the flow guide plate divides the interior of the earphone housing into a first unit cavity and a second unit cavity. The integrated circuit board is located in the second unit cavity, and the sound insulation cotton is located in the second unit cavity and close to the first unit cavity.
[0009] As a further preference, a fourth air inlet hole is opened at the bottom of the earphone housing. The fourth air inlet hole is located at the bottom side of the first unit cavity. The fourth air inlet hole communicates with the first unit cavity up and down. The fourth air inlet hole is close to one side of the bottom end of the flow guide plate. An arc-shaped flow guiding part is arranged in the first unit cavity. The first air inlet hole and the fourth air inlet hole are located at both ends of the arc-shaped flow guiding part. The aperture of the fourth air inlet hole is smaller than that of the first air inlet hole. A warping part is arranged on the arc-shaped flow guiding part, and the warping part bends towards the direction of the fourth air inlet hole.
[0010] As a further preference, the upper and lower ends of the flow guide plate are flexibly connected to the cavity wall of the earphone housing through a diaphragm. The sensing end of the wind noise sensor abuts against the peak position of the wavy surface of the flow guide plate.
[0011] As a further preference, a hanging wheel is installed on the power output shaft of the micro motor. Two hanging holes are opened on the hanging wheel at equal angles. A twisting rope is threaded through the two hanging holes. The twisting rope is made of hard rubber. The two free ends of the twisting rope extend forward and are connected to the last folding end of the sound insulation cotton. The microcontroller at least includes a forward and reverse control module. The forward and reverse control module controls the forward and reverse rotation of the micro motor. When the two free ends of the twisting rope are intertwined driven by the hanging wheel, a pulling force is generated, and the pulling force and the folding performance of the sound insulation cotton are used to expand and open each section of the sound insulation cotton; conversely, when the two free ends of the twisting rope are separated driven by the hanging wheel, a pushing force is released, and the pushing force and the folding performance of the sound insulation cotton are used to fold and close each section of the sound insulation cotton.
[0012] The beneficial effects of the present invention compared with the prior art are:
[0013] Sound insulation cotton is provided inside the earphone housing. The sound insulation cotton is in a folded shape composed of multiple sections, and a number of third air inlets are opened on each section. When there is no noise condition, a small amount of air flow enters the first unit cavity through the first air inlet, the vibration amplitude of the flow guide plate becomes smaller, and the induction signal of the wind noise sensor becomes weaker. The microcontroller controls the micro motor to rotate in the reverse direction. After the timing module times, the reverse rotation of the micro motor stops. The two free ends of the rope-twisting part driven by the hanging wheel change from a slack state to being intertwined. At this time, the rope-twisting part generates a pulling force, and the pulling force and the folding performance of the sound insulation cotton are used to quickly unfold each section of the sound insulation cotton. At this time, the third air inlets opened on each section of the sound insulation cotton are opened again. The weak air flow turbulently flows upward through the arc-shaped flow guide part in the first unit cavity, then is guided forward through the tilted part, and then sequentially passes through the second air inlet and the third air inlet and enters the second unit cavity to dissipate heat from the components in the second unit cavity, improving the service life. When the wind noise generated by the air flow is not strong enough to affect the normal use of the earphone, even if it enters the first unit cavity through the first air inlet, it will be released outward through the fourth air inlet. Only when the intensity of the air flow causes the flow guide plate to vibrate, the flow guide plate will feedback the signal to the wind noise sensor, and only through the induction function of the wind noise sensor and the above signal control method of the microcontroller, the micro motor is controlled to act, and each section of the sound insulation cotton is folded together to play its noise reduction role. At this time, each third air inlet is closed, the air flow no longer enters, and the heat dissipation also stops. It can be seen from this that the noise reduction function of this Bluetooth earphone is reflected in that when a strong air flow acts on the windward surface, it switches to the noise reduction mode, and when a weak air flow acts on the windward surface, it switches to using the weak air flow to dissipate heat from the earphone and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 FIG. 1 is a schematic external structure diagram of a Bluetooth earphone provided by an embodiment of the present invention;
[0015] Figure 2 FIG. 2 is a schematic diagram of a disassembled Bluetooth earphone provided by an embodiment of the present invention;
[0016] Figure 3 FIG. 3 is a schematic internal structure diagram of an earphone housing led out from a Bluetooth earphone provided by an embodiment of the present invention; Figure 2 FIG. 4 is a schematic plan view led out from a Bluetooth earphone provided by an embodiment of the present invention;
[0017] Figure 4 FIG. 5 is a schematic diagram of another rotation perspective led out from a Bluetooth earphone provided by an embodiment of the present invention; Figure 3 FIG. 6 is a schematic plan view led out from a Bluetooth earphone provided by an embodiment of the present invention;
[0018] Figure 5 FIG. 7 is a schematic diagram of another rotation perspective led out from a Bluetooth earphone provided by an embodiment of the present invention; Figure 3 FIG. 8 is a schematic diagram of another rotation perspective led out from a Bluetooth earphone provided by an embodiment of the present invention;
[0019] Figure 6A flowchart of the circuit modules in a Bluetooth headset provided by an embodiment of the present invention.
[0020] In the figure: 1. earphone shell; 2. integrated circuit board; 3. bluetooth module; 4. wind noise sensor; 5. microcontroller; 6. micro motor; 7. first air inlet; 8. guide plate; 9. sound insulation cotton; 10. second air inlet; 11. third air inlet; 12. first unit cavity; 13. second unit cavity; 14. fourth air inlet; 15. arc-shaped guide part; 16. tilting part; 17. diaphragm; 18. hanging wheel; 19. hanging hole; 20. twist rope. DETAILED DESCRIPTION
[0021] The above and other embodiments and advantages of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.
[0022] In one embodiment, if Figures 1-6 As shown:
[0023] The present embodiment provides a Bluetooth headset, including a headset housing 1, the headset housing 1 is provided with an integrated circuit board 2, the integrated circuit board 2 includes at least a Bluetooth module 3, a wind noise sensor 4 and a microcontroller 5, a connecting frame is provided in the headset housing 1, a micro motor 6 is installed on the connecting frame, a first air inlet 7 is opened at the outer end of the headset housing 1, a guide plate 8 close to the first air inlet 7 is provided in the headset housing 1, and sound insulation cotton 9 is provided in the headset housing 1, and the sound insulation cotton 9 is in the form of a folded plate folded in multiple sections, one folded end of the sound insulation cotton 9 is close to the guide plate 8, and the other folded end of the sound insulation cotton 9 is close to the guide plate 8. The folding end is connected to the power output shaft of the micro motor 6, the sensing end of the wind noise sensor 4 is against the guide plate 8, the guide plate 8 is flexibly connected to the earphone housing 1, the Bluetooth module 3 is wirelessly connected to the terminal device, and is matched and controlled by the microcontroller 5 to control the volume control module on the terminal device, the wind noise sensor 4 is electrically connected to the microcontroller 5, and the microcontroller 5 controls the rotation of the micro motor 6, and the micro motor shaft drives the sound insulation cotton 9 to fold and expand, a second air inlet hole 10 is opened on the guide plate 8, and a third air inlet hole 11 is provided on each folding section of the sound insulation cotton 9.
[0024] The opening position of the second air inlet 10 is higher than the opening position of the third air inlet 11. The opening position of the third air inlet 11 on each folded section of the sound insulation cotton 9 gradually increases toward the direction of the guide plate 8. After each folded section of the sound insulation cotton 9 is folded toward one side of the guide plate 8, the second air inlet 10 and the third air inlet 11 are covered. After each folded section of the sound insulation cotton 9 is expanded toward the side of the guide plate 8, the second air inlet 10 and the third air inlet 11 are opened. Figure 3 , Figure 5As shown, the height positions of the third air intake holes 11 formed in each section of the sound insulation cotton 9 gradually decrease from front to back. When each section of the sound insulation cotton 9 is folded together, the third air intake hole 11 on the previous section is closed by the effective surface of the subsequent section, and so on, so that the third air intake holes 11 on each section are all closed. On the contrary, when each section of the sound insulation cotton 9 is opened, the third air intake hole 11 on the previous section is away from the covering of the subsequent section, and so on, so that the third air intake holes 11 on each section are all opened.
[0025] The edge of the flow guiding plate 8 is connected to the cavity wall of the earphone housing 1, and the edge of each folding section of the sound insulation cotton 9 is in sliding contact with the cavity wall of the earphone housing 1, which not only ensures the folding movement of the sound insulation cotton 9, but also further improves its sound insulation effect by using the contact relationship with the cavity wall of the earphone housing 1 when it is completely folded into a thicker shape.
[0026] The flow guiding plate 8 is wavy, the first air intake hole 7 is located outside the upper part of the flow guiding plate 8. The setting of the flow guiding plate 8 divides the interior of the earphone housing 1 into a first unit cavity 12 and a second unit cavity 13. The integrated circuit board 2 is located in the second unit cavity 13, and the sound insulation cotton 9 is located in the second unit cavity 13 and close to the first unit cavity 12.
[0027] A fourth air intake hole 14 is formed in the bottom of the earphone housing 1. The fourth air intake hole 14 is located on the bottom side of the first unit cavity 12. The fourth air intake hole 14 is vertically communicated with the first unit cavity 12. The fourth air intake hole 14 is close to one side of the bottom end of the flow guiding plate 8. An arc-shaped flow guiding part 15 is arranged in the first unit cavity 12. The first air intake hole 7 and the fourth air intake hole 14 are located at both ends of the arc-shaped flow guiding part 15. The aperture of the fourth air intake hole 14 is smaller than that of the first air intake hole 7. A warping part 16 is arranged on the arc-shaped flow guiding part 15, and the warping part 16 bends towards the direction of the fourth air intake hole 14.
[0028] A hanging wheel 18 is installed on the power output shaft of the micro motor 6. Two hanging holes 19 are equiangularly arranged on the hanging wheel 18. A twisting rope 20 is threaded through the two hanging holes 19. The twisting rope 20 is made of hard rubber. The two free ends of the twisting rope 20 extend forward and are connected to the last folding end of the sound insulation cotton 9. The microcontroller 5 at least includes a forward and reverse control module. The forward and reverse control module controls the forward and reverse rotation of the micro motor 6. When the two free ends of the twisting rope 20 are intertwined under the drive of the hanging wheel 18, a pulling force is generated, and the pulling force and the folding performance of the sound insulation cotton 9 are used to expand and open each section of the sound insulation cotton 9; on the contrary, when the two free ends of the twisting rope 20 are separated under the drive of the hanging wheel 18, a thrust is released, and the thrust and the folding performance of the sound insulation cotton 9 are used to fold and close each section of the sound insulation cotton 9.
[0029] Working principle and effect: When the Bluetooth headset is worn and used, the oncoming airflow enters the headset housing 1 through the first air inlet 7, and is temporarily stored in the first unit cavity 12 after being blocked by the flow guide plate 8. As the airflow gradually increases, the air pressure in the first unit cavity 12 will gradually increase, and the air pressure acting on the flow guide plate 8 will also increase. When the air pressure in the first unit cavity 12 increases to cause the flow guide plate 8 to move backward, this movement effect will be fed back to the wind noise sensor 4 (which can also be a pressure sensor or a tension sensor, etc.). The wind noise sensor 4 feeds the detected motion signal back to the microcontroller 5. When the detected motion signal (such as the magnitude of pressure or tension) exceeds the set value on the microcontroller 5, the microcontroller 5 controls the micro motor 6 to rotate electrically. After the timing module times, the micro motor 6 stops rotating, and the two free ends of the rope-twisting 20 driven by the hanging wheel 18 change from being intertwined with each other to Figure 5 the loose state shown. At this time, the two free ends of the rope-twisting 20 change from a curved shape to a straight shape. Through the thrust generated by the straight shape and its original hard rubber material properties, as well as the original folding performance of the sound insulation cotton 9, each unit constituting the sound insulation cotton 9 quickly folds together, so that the thickness of the sound insulation cotton 9 quickly becomes thicker. The third air inlets 11 opened on each section of the sound insulation cotton 9 will be closed because they fold together. By using the increased thickness of the folded sound insulation cotton 9, the distance between the cochlea and the windward side of the headset is made farther, and the thickened sound insulation cotton 9 is used to reduce noise. At the same time, the microcontroller 5 also sends the signal to the terminal device (such as a mobile phone) through Bluetooth wireless transmission technology, and the volume automatic adjustment module in the terminal device automatically adjusts the volume to make up for the influence of noise on the sound of the headset and further improve the experience effect.
[0030] Since the sound insulation cotton 9 is in a folded shape composed of multiple sections, and a number of third air intake holes 11 are provided on each section, when the above noise condition (the wind noise on the windward surface is reduced) does not exist, a small amount of air flow enters the first unit cavity 12 from the first air intake hole 7, the vibration amplitude of the flow guide plate 8 becomes smaller, the induction signal of the wind noise sensor 4 becomes weaker, the microcontroller 5 controls the micro motor 6 to rotate in the reverse direction. After the timing module times, the reverse rotation of the micro motor 6 stops. The two free ends of the twisting rope 20 driven by the hanging wheel 18 change from a slack state to being intertwined. At this time, the twisting rope 20 generates a pulling force, and the pulling force and the folding performance of the sound insulation cotton 9 are used to quickly open each section of the sound insulation cotton 9. At this time, the third air intake holes 11 provided on each section of the sound insulation cotton 9 are opened again. The weak air flow turbulently flows upward in the first unit cavity 12 through the arc-shaped flow guide part 15, then is guided forward through the upturned part 16, and then sequentially passes through the second air intake hole 10 and the third air intake hole 11 to enter the second unit cavity 13, so as to dissipate heat from the components in the second unit cavity 13 and improve the service life. When the wind noise generated by the air flow is not sufficient to affect the normal use of the earphone, even if it enters the first unit cavity 12 from the first air intake hole 7, it will be released outward through the fourth air intake hole 14. Only when the intensity of the air flow causes the flow guide plate 8 to vibrate, will the flow guide plate 8 feedback the signal to the wind noise sensor 4, and only through the induction function of the wind noise sensor 4 and the above signal control method of the microcontroller 5, will the micro motor 6 be controlled to act, and only then will each section of the sound insulation cotton 9 be folded together to play its noise reduction role. At this time, each third air intake hole 11 is closed, the air flow no longer enters, and no longer dissipates heat. It can be seen from this that the noise reduction function of this Bluetooth earphone is reflected in that when a strong air flow acts on the windward surface, it switches to the noise reduction mode, and when a weak air flow acts on the windward surface, it switches to using the weak air flow to dissipate heat from the earphone, thereby improving the service life.
[0031] The upper and lower ends of the flow guide plate 8 are flexibly connected to the cavity wall of the earphone housing 1 through the vibration membrane 17, and the induction end of the wind noise sensor 4 abuts against the peak position of the wave surface of the flow guide plate 8. The upper and lower ends of the flow guide plate 8 adopt the flexible connection method between the vibration membrane 17 and the cavity wall of the earphone housing 1, so that the flow guide plate 8 has mobility. When the user is running, if a strong air flow enters the first unit cavity 12 through the first air intake hole 7, after being collected by the first unit cavity 12, it will act on the flow guide plate 8. At this time, the flow guide plate 8 will shake back and forth, and the generated shaking effect will act on the wind noise sensor 4. The wind noise sensor 4 is more likely to receive the signal and feedback the signal to the microcontroller 5. If this induction signal exceeds the set value on the microcontroller 5, the microcontroller 5 will instruct the micro motor 6 to work energized. The micro motor 6 will automatically stop after working for a few seconds under the control of the timing module, and when working, it will drive the hanging wheel 18 to rotate, and the hanging wheel 18 will drive the twisting rope 20 to rotate, so that the two free ends of the twisting rope 20 change from being intertwined to being slack relative to the last section of the sound insulation cotton 9. This flexible connection performance of the flow guide plate 8 improves the induction sensitivity of the wind noise sensor 4.
[0032] The above orientation references do not represent the specific orientations of the components in this embodiment. This embodiment is only for the convenience of describing the solution and is set with relative descriptions with reference to the orientations in the figures. In essence, the specific orientations of the components are determined according to their actual installation, actual use, and the customary orientation descriptions of those skilled in the art. This is hereby stated.
[0033] The specific embodiments described above further elaborate on the invention purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only the specific embodiments of the present invention and are not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
Claims
1. A Bluetooth headset, characterized in that, It includes a headphone housing (1). The headphone housing (1) is provided with an integrated circuit board (2). The integrated circuit board (2) at least includes a Bluetooth module (3) and a microcontroller (5). A wind noise sensor (4) is provided inside the headphone housing (1). A connecting frame is provided inside the headphone housing (1), and a micro motor (6) is installed on the connecting frame. A first air inlet hole (7) is opened at the front end of the headphone housing (1). A flow guide plate (8) is provided inside the headphone housing (1) near the first air inlet hole (7). Sound insulation cotton (9) is provided inside the headphone housing (1). The sound insulation cotton (9) is a multi-segment folded plate. One folded end of the sound insulation cotton (9) is close to the flow guide plate (8), and the other folded end of the sound insulation cotton (9) is connected to the power output shaft of the micro motor (6). The sensing end of the wind noise sensor (4) abuts against the flow guide plate (8). The flow guide plate (8) is flexibly connected to the headphone housing (1). The Bluetooth module (3) is wirelessly connected to a terminal device and is matched and controlled by the microcontroller (5) with the volume control module on the terminal device. The wind noise sensor (4) is electrically connected to the microcontroller (5), and the microcontroller (5) controls the micro motor (6) to rotate. The micro motor shaft drives the sound insulation cotton (9) to fold and expand. A second air inlet hole (10) is opened on the flow guide plate (8), and a third air inlet hole (11) is provided on each folded segment of the sound insulation cotton (9).
2. The Bluetooth headset according to claim 1, characterized in that, The opening position of the second air inlet hole (10) is higher than the opening position of the third air inlet hole (11). The opening position of the third air inlet hole (11) on each folded segment of the sound insulation cotton (9) gradually becomes higher in the direction of the flow guide plate (8). After each folded segment of the sound insulation cotton (9) folds towards the side of the flow guide plate (8), the second air inlet hole (10) and the third air inlet hole (11) are covered. After each folded segment of the sound insulation cotton (9) expands towards the side away from the flow guide plate (8), the second air inlet hole (10) and the third air inlet hole (11) are opened.
3. The Bluetooth headset according to claim 2, characterized in that, The edge of the flow guide plate (8) is connected to the cavity wall of the headphone housing (1), and the edge of each folded segment of the sound insulation cotton (9) is in sliding contact with the cavity wall of the headphone housing (1).
4. The Bluetooth headset according to claim 3, wherein, The flow guide plate (8) is wavy. The first air inlet hole (7) is located outside and above the flow guide plate (8). The setting of the flow guide plate (8) divides the interior of the headphone housing (1) into a first unit cavity (12) and a second unit cavity (13). The integrated circuit board (2) is located in the second unit cavity (13), and the sound insulation cotton (9) is located in the second unit cavity (13) and close to the first unit cavity (12).
5. The Bluetooth headset according to claim 4, characterized in that, The bottom of the earphone housing (1) is provided with a fourth air inlet hole (14). The fourth air inlet hole (14) is located on the bottom side of the first unit cavity (12). The fourth air inlet hole (14) is vertically communicated with the first unit cavity (12). The fourth air inlet hole (14) is close to one side of the bottom end of the flow guide plate (8). An arc-shaped flow guide part (15) is arranged in the first unit cavity (12). The first air inlet hole (7) and the fourth air inlet hole (14) are located at both ends of the arc-shaped flow guide part (15). The aperture of the fourth air inlet hole (14) is smaller than that of the first air inlet hole (7). A warping part (16) is arranged on the arc-shaped flow guide part (15), and the warping part (16) bends towards the direction of the fourth air inlet hole (14).
6. The Bluetooth headset according to claim 5, characterized in that, The upper and lower ends of the flow guide plate (8) are flexibly connected with the cavity wall of the earphone housing (1) through a diaphragm (17). The sensing end of the wind noise sensor (4) abuts against the peak position of the wave surface of the flow guide plate (8).
7. The Bluetooth headset according to claim 6, characterized in that, A hanging wheel (18) is installed on the power output shaft of the micro motor (6). Two hanging holes (19) are equiangularly arranged on the hanging wheel (18). A twisting rope (20) is threaded through the two hanging holes (19). The twisting rope (20) is made of hard rubber. The two free ends of the twisting rope (20) extend forward and are connected to the last folding end of the sound insulation cotton (9).
8. The Bluetooth headset according to claim 7, wherein The microcontroller (5) at least includes a forward and reverse control module. The forward and reverse control module controls the forward and reverse rotation of the micro motor (6). The two free ends of the twisting rope (20) are intertwined with each other and generate tension under the drive of the hanging wheel (18), and each section of the sound insulation cotton (9) is expanded and pulled open by using the tension and the folding performance of the sound insulation cotton (9); on the contrary, the two free ends of the twisting rope (20) are separated from each other and release thrust under the drive of the hanging wheel (18), and each section of the sound insulation cotton (9) is folded and closed by using the thrust and the folding performance of the sound insulation cotton (9).