A motorcycle helmet based on voice navigation

Abstract

This invention relates to the field of motorcycle helmet technology, specifically to a motorcycle helmet based on voice navigation. The helmet body includes a helmet body with a cavity around its upper surface to accommodate the rider's head and an observation opening facing the rider's face. The bottom of the helmet has a channel for the rider to put on and take off the helmet. An exhaust channel penetrating the helmet body is provided for ventilation and heat dissipation. A sound-generating unit and a microphone unit for interacting with the navigation system are located within the cavity. This invention incorporates an isolation and noise reduction device on the helmet body. This device actively isolates and reduces noise inside the helmet when the sound-generating unit or microphone unit interacts with the navigation system. The isolation and noise reduction device reduces the impact of noise transmitted through the exhaust channel to the helmet's interior on voice navigation by temporarily reducing the connectivity between the exhaust channel and the outside of the helmet body.

Description

Technical Field

[0001] This invention relates to the field of motorcycle helmet technology, specifically to a motorcycle helmet based on voice navigation. Background Technology

[0002] Motorcycles have a relatively compact body structure, making it difficult to install clear and concise visual navigation systems such as head-up displays (HUDs). Compared to visual navigation, voice navigation is less distracting to the driver and offers higher driving safety. Therefore, voice navigation is widely used in motorcycle navigation. Its main forms can be divided into two types based on the location of the sound-emitting and microphone units: helmets with built-in sound-emitting and microphone units, and helmets without built-in sound-emitting and microphone units. When using a helmet without built-in sound-emitting and microphone units for voice navigation, the driver needs to wear a Bluetooth headset or other sound-emitting and microphone units to interact with the navigation system.

[0003] However, compared to the relatively enclosed and quiet driving environment of cars, voice navigation during motorcycle riding faces more noise interference, regardless of the type of helmet used. Existing technologies mainly reduce the impact of wind noise and other noises on voice navigation by placing sound-insulating materials inside the motorcycle helmet corresponding to the driver's ears, installing sound-insulating windproof devices at the connection between the helmet and the driver's neck, and using composite sandwich noise-reducing materials in the main body of the helmet shell.

[0004] At the same time, in order to ensure the breathability and heat dissipation of the helmet, it is still necessary to open the exhaust channels for breathability and heat dissipation in the front and back directions and even the top side of the helmet. External noise can still easily be transmitted into the helmet through these exhaust channels, which will eventually interfere with the voice signal interaction of voice navigation.

[0005] To address this, a motorcycle helmet based on voice navigation is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a motorcycle helmet based on voice navigation. By incorporating an isolation and noise reduction device on the helmet body, the device actively isolates and reduces noise inside the helmet when the sound-generating unit or receiver unit interacts with the navigation system. The isolation and noise reduction device reduces the impact of noise transmitted from the exhaust channels to the helmet's interior on voice navigation by temporarily reducing the connectivity between the exhaust channels and the exterior of the helmet body. This solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A motorcycle helmet based on voice navigation, comprising:

[0009] The helmet body has a cavity around its upper part to accommodate the driver's head and an observation port on the side facing the driver's face. The bottom of the helmet has a channel for the driver to put on and take off. The helmet body has an exhaust channel that runs through the helmet body for ventilation and heat dissipation. The exhaust channel includes at least one air inlet and at least one air outlet, as well as a cavity between the air inlet and the air outlet. The cavity contains a sound-generating unit and a sound-receiving unit for interacting with the navigation system.

[0010] Also includes:

[0011] An isolation and noise reduction device is provided on the helmet body. The isolation and noise reduction device is used to actively isolate and reduce noise inside the helmet when the sound-generating unit or the sound-receiving unit interacts with the navigation system.

[0012] The observation port can be an independent opening connecting the inner and outer sides of the helmet body, i.e., a closed helmet, or it can be an extension notch connected to the bottom of the helmet for the rider to put on and take off, i.e., a semi-open helmet. Regardless of the form of the observation port, a corresponding openable transparent shielding structure is required. Since the transparent shielding structure is a conventional and necessary device in this field, it will not be explained in detail here. However, in actual use, the transparent shielding structure of a semi-open helmet cannot form an effective seal with the observation port. Wind noise during motorcycle operation has a significant impact on semi-open helmets and is almost impossible to avoid. Therefore, voice navigation systems are rarely used on semi-open helmets. Thus, the noise reduction device of this invention is mainly aimed at closed helmets. However, the significance of the noise reduction device of this invention for active noise reduction of voice navigation systems is not limited to closed helmets. Active noise reduction of semi-closed helmets can also be improved through the specific solutions disclosed in this invention.

[0013] The sound-generating and receiving units used to interact with the navigation system can be helmet-mounted devices independently installed in the helmet's cavity, or external devices worn by the driver that are not directly connected to the helmet, including but not limited to Bluetooth headsets or wired headsets with microphones. During driving, the sound-generating or receiving units interact with the navigation system to transmit information. Voice navigation can be categorized into passive and active methods based on the information delivery mechanism.

[0014] Active: After receiving the signal provided by the navigation system, the sound unit transmits the signal to the driver in the form of voice, thereby providing the driver with traffic navigation information such as road conditions and direction of travel;

[0015] Passive: The driver actively transmits voice signals to the navigation system through the radio unit, such as by asking for remaining mileage, estimated arrival time, and traffic conditions at the destination. After receiving the query request, the navigation system pushes a signal to the driver through the radio unit.

[0016] The solution of this invention is as follows: When the sound-generating unit is transmitting sound signals or the sound-receiving unit is receiving sound signals, the noise reduction device briefly reduces the connectivity between the exhaust channels and the outside of the helmet body, thereby reducing the impact of noise transmitted through these exhaust channels into the helmet's interior on voice navigation. After the sound-generating unit or sound-receiving unit stops working, the connectivity between the exhaust channels and the outside of the helmet body is automatically restored to ensure the breathability and heat dissipation of the helmet's interior. Compared to the overall driving time, the working time of the sound-generating unit and the sound-receiving unit is relatively short. Therefore, during the process of the noise reduction device reducing the connectivity of the exhaust channels, the impact on the driver's comfort and safety is low.

[0017] The noise reduction device includes a sealing mechanism installed on the air inlet that works in conjunction with both the sound-generating unit and the sound-receiving unit. The sealing mechanism can open and close the air inlet after receiving a signal command from the sound-generating unit or the sound-receiving unit to isolate noise entering the helmet body through the air inlet. For airflow considerations, in the prior art, the air inlet of the helmet heat dissipation channel is mostly located in the forward direction of travel, i.e., the windward side of the helmet, while the air outlet of the exhaust channel is generally located in the opposite direction of travel or on the top of the helmet.

[0018] The windward side of the helmet experiences significant air resistance during travel. Simultaneously, this high-speed airflow is diverted to the sides and leeward side of the helmet through its streamlined structure. Consequently, a large amount of turbulence is generated on the windward side of the helmet, resulting in considerable noise. This noise is directly transmitted into the helmet body through the air intake located on the windward side.

[0019] For vents located in the opposite direction of travel or on the top of the helmet, a sealing mechanism is not required, because the purpose of a sealing mechanism is to prevent noise generated during motorcycle operation and when using voice navigation from being conducted into the helmet through the air.

[0020] In the opposite direction of travel or at the top of the helmet, the airflow is fast and stable. According to Bernoulli's principle, the pressure is low where the airflow is fast. The air is relatively thin in the opposite direction of travel or at the top of the helmet, so sound is not easily transmitted into the helmet, or the loudness of the sound entering the helmet at these two locations is significantly reduced. This principle can be simply understood as being similar to the principle of a car sunroof: when a car is in motion, the sound transmitted into the cabin is less than that transmitted through the side windows when the sunroof is open.

[0021] Most helmets have an adjustable valve for manually adjusting the air intake. For safety reasons, the sealing mechanism must be compatible with the existing adjustable valve and has a lower priority than the valve; that is, the sealing mechanism must not close the air intake for extended periods. The adjustable valve is mostly designed as a sliding plate with perforations. This means that the perforated sliding plate moves within a groove, causing the perforations on the plate to overlap or intersect with the air intake, thus achieving adjustment or opening / closing. The number of perforations can be one or multiple. When designing multiple perforation structures, consider a close arrangement of multiple perforations, with the helmet's air intake also featuring multiple perforation structures, and both arrangements interspersed.

[0022] Preferably, both the helmet's air intake and the slide plate adopt a grid-like perforation. The width of the perforation spacing on the helmet's air intake is exactly greater than or equal to the width of the perforation on the slide plate. Thus, all the gaps can be staggered or overlapped by moving the slide plate by only one perforation spacing, which greatly improves the layout of the power structure, such as requiring a smaller motor and a smaller transmission component.

[0023] When voice navigation is activated, the sealing mechanism briefly closes all channels connecting the inside and outside of the helmet on the air intake. The sealing principle is the same as that of the regulating valve used to manually adjust the air intake volume. Since the maximum cross-sectional dimension of the air intake channel is generally no more than one square centimeter, the opening and closing structure of the sealing mechanism can use a sliding structure, such as a gear and rack control plate to move horizontally. That is, a set of motor-driven gear and rack control plate movement is added to the manual regulating valve. In other words, no matter what position the gate of the regulating valve is in, the gear and rack structure can move the plate to a state where the plate completely closes the air intake under the drive of the motor.

[0024] In addition to the sliding of gears and racks, the switching structure of the sealing mechanism can also adopt an electromagnetic sliding plate structure. When there is insufficient horizontal space to place a horizontally moving structure, it can be replaced by a rotating structure. The principle is similar to the regulating valve used to manually adjust the air intake volume. By installing a motor-driven sector plate on the air intake, and opening holes on the sector plate that match the air intake to ensure the normal air intake function of the air intake, the sector plate is rotated by the motor so that the holes on the sliding plate and the holes on the air intake are staggered or overlapped, thereby achieving the state of completely closing or opening the air intake.

[0025] In addition to the two mechanical sealing mechanisms mentioned above, an airbag inflatable sealing structure can also be considered to seal the air inlet. Regardless of the type of sealing mechanism used, when the gaps on the skateboard and the air inlet overlap, a sealing structure needs to be installed at the mating gaps to improve sound insulation. This sealing structure can be a flexible material, such as a self-lubricating silicone ring, installed at each gap interval on the skateboard to match the rounded corners of the gaps. Alternatively, the entire skateboard can be made of self-lubricating resin. Similarly, when the entire skateboard is integrally molded from self-lubricating resin, a sealing structure matching the rounded corners of the gaps also needs to be installed at each gap interval on the skateboard. The protrusions filling the gaps serve as sealing structures, while all moving parts must be made of self-lubricating materials such as polyetheretherketone (PEEK) and polytetrafluoroethylene (PTFE), which do not require additional lubricants. Furthermore, an elastic structure can be installed on the skateboard to eliminate potential resonance. Since a clearance must be reserved between the skateboard and the air intake, this clearance may cause the vibration of the motorcycle during driving to be transmitted to the skateboard, thus inducing the skateboard to vibrate and produce abnormal noise. Improving the process precision and reducing the clearance can reduce the probability of resonance, but it will also further increase the manufacturing cost. The elastic structure can be an external spring or can utilize the elastic deformation of the skateboard material itself.

[0026] When using a mechanically driven enclosed mechanism, at least one stage of the transmission structure should be a worm gear. This is because the space available for installing motors and transmission components on a helmet is limited. Within the same space, a worm gear has a larger transmission ratio, allowing for the use of smaller, lower-power drive motors. Furthermore, since the helmet's interlayer itself is a well-sealed structure, there is no need to worry about foreign objects affecting the normal operation of the transmission structure. Additionally, the high-speed airflow from the air intake can quickly remove the heat generated by the worm gear transmission structure, thus compensating for the excessive heat generation characteristic of worm gears.

[0027] A bone conduction warning device needs to be installed on the top or side of the helmet to actively remind the driver. Before the voice navigation actively pushes navigation information, the warning device on the top or side of the helmet will remind the driver in advance through low-frequency vibration bone conduction. This will prevent the driver from feeling uncomfortable if the air intake is suddenly closed, and will also prevent the driver from missing information or not receiving accurate signals, which could easily lead to distraction. In addition, the sudden sound could easily startle the driver, both of which can easily lead to traffic accidents.

[0028] The alert device is positioned on the side of the helmet, closer to the driver's ear, making it easier to receive the signal. Positioning it on the top of the helmet is advantageous because the wind speed is highest there, and the air is thinnest, minimizing the impact of external noise on the driver's hearing. Furthermore, due to the larger contact area between the driver's head and the helmet, the vibration and sound signals from the alert device are primarily transmitted via bone conduction. To differentiate the alert signal from the navigation system's voice signal, bone conduction is less susceptible to external noise interference, making it easier for the driver to receive and improving transmission efficiency. The alert device can utilize a linear motor, similar to the linear vibration motor in a mobile phone, characterized by its small size, large vibration amplitude, and low power consumption. The linear motor's linear motion can also be coordinated with navigation signals; for example, when a left turn is imminent, the linear motor's vibration direction can be adjusted to the left. Alternatively, the alert device can employ a conventional motor in conjunction with a helical slider; the motor's activation causes the slider to strike the helmet, generating low-frequency vibrations.

[0029] The power source for the sealing mechanism and the warning device can be a battery installed on the helmet. If the helmet itself has a built-in sound unit and a microphone, the batteries of the sound unit and microphone can be used directly. Since a worm gear drive is used, the requirements for the power supply unit are low. The linear vibration motor also has low requirements for the power supply unit. If the helmet itself does not have a built-in sound unit and microphone, a battery can be installed in the helmet to drive the sealing mechanism and the warning device.

[0030] During the brief period when the air inlet is sealed and soundproofed by the enclosed mechanism, the driver's exhaled, highly humid air is likely to adhere to the transparent shielding structure of the observation port, thus forming water mist and obstructing the view. Therefore, an active anti-fog structure needs to be installed at the air outlet of the exhaust channel.

[0031] An active defogging structure is used to remove water mist that forms on the transparent shielding structure of the observation port during the brief period when the air intake is closed for sound insulation by a closed mechanism, thereby improving driving safety. The active defogging structure can be a structure that uses wind to remove water mist, or it can be a heat-conducting or heated transparent shielding structure that prevents water vapor from condensing into fog on the transparent shielding structure.

[0032] The active anti-fog structure includes an air guide plate installed on the air outlet. The air guide plate is a perforated arc-shaped cover structure that covers the air outlet. It uses the high-speed airflow formed by the helmet on the air guide plate during driving to carry out the humid air inside the helmet. Its principle is similar to that of a jet vacuum pump, which uses high-speed airflow to create a low-pressure zone to expel the humid air inside the helmet.

[0033] The outer surface of the helmet near the air deflector and air outlet forms a defogging channel that guides airflow. The air deflector has at least one inlet and at least one outlet. Furthermore, for rain protection and noise reduction, the inlet and outlet positions need to be staggered from the helmet air outlet. The cross-sectional area of ​​the inlet end of the defogging channel is greater than or equal to the cross-sectional area of ​​the outlet end, and the vertical height of the outlet end of the defogging channel is lower than that of the inlet end so that rainwater can be discharged in time. The inlet and outlet positions need to be equipped with airflow guide curves to reduce wind noise.

[0034] Furthermore, a guide vane is added outside the outlet. The guide vane and the air guide vane form an angle with a large gap at the inlet end and a small gap at the outlet end, thereby increasing the gas flow velocity at the outlet position and further improving the efficiency of expelling humid air from inside the helmet.

[0035] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0036] 1. An isolation and noise reduction device is installed on the helmet body. The isolation and noise reduction device is used to actively isolate and reduce noise inside the helmet when the sound unit or the radio unit interacts with the navigation system. The isolation and noise reduction device reduces the impact of noise transmitted into the helmet through these exhaust channels on voice navigation by briefly reducing the connectivity between the exhaust channels and the outside of the helmet body. After the sound unit or the radio unit stops working, it automatically restores the connectivity between the exhaust channels and the outside of the helmet body to ensure the breathability and heat dissipation of the helmet body. Compared with the overall driving time, the working time of the sound unit and the radio unit is relatively short. Therefore, the impact on the driver's comfort and safety during the process of the isolation and noise reduction device reducing the connectivity of the exhaust channels is low.

[0037] 2. Install a bone conduction reminder device on the top or side of the helmet to actively remind the driver. Before the voice navigation actively pushes navigation information, the reminder device on the top or side of the helmet will remind the driver in advance through vibration bone conduction. This will prevent the noise reduction device from suddenly closing the air intake and causing discomfort to the driver. At the same time, it will prevent the voice signal from being suddenly emitted and the driver not having time to hear and receive the information, thus preventing the driver from missing the information.

[0038] 3. An active defogging structure is installed at the exhaust outlet of the exhaust channel. The active defogging structure is used to remove water mist that forms on the transparent shielding structure of the observation port during the brief soundproofing of the air intake by the sealing mechanism, thereby improving driving safety. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the appearance of the present invention;

[0040] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0041] Figure 3 for Figure 2 Enlarged view of part A;

[0042] Figure 4 for Figure 2 Enlarged view of part B;

[0043] Figure 5 This is a schematic diagram of a skateboard and its transmission structure.

[0044] Figure 6 This is a schematic diagram of the partition structure;

[0045] Figure 7 This is a schematic diagram showing the position of the slide plate and partition when the air intake is open.

[0046] Figure 8 A cross-sectional diagram showing the position of the slide plate and partition when the air intake is open;

[0047] Figure 9 This is a schematic diagram showing the alignment of the slide plate and partition when the air inlet is closed.

[0048] In the diagram: 1. Helmet body; 2. Air inlet; 3. Air outlet; 4. Slide plate; 5. Grease rack; 6. Motor; 7. Worm; 8. Spring; 9. Silicone ring; 10. Air guide plate; 11. Inlet; 12. Outlet; 13. Flow deflector; 14. Gate; 15. Partition; 16. Reminder device. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please see Figures 1 to 9 This invention provides a motorcycle helmet based on voice navigation, the technical solution of which is as follows:

[0051] The helmet body 1 has a cavity around its upper part to accommodate the driver's head and an observation port on the side facing the driver's face. The bottom of the helmet has a channel for the driver to put on and take off. The body has an exhaust channel through the helmet body 1 for ventilation and heat dissipation. The exhaust channel includes at least one air inlet 2 and at least one air outlet 3 and a cavity between the air inlet 2 and the air outlet 3. The cavity is equipped with a sound-generating unit and a sound-receiving unit for interaction with the navigation system.

[0052] As one embodiment of the present invention, refer to Figures 1 to 9The air inlet 2 is equipped with an adjustment valve for manually adjusting the cross-sectional area of ​​the air intake channel. The air inlet 2 is equipped with a partition 15 with a grid-like perforation to ensure communication between the inside and outside of the helmet. A gate 14 is slidably installed outside the grid-like perforation. A push rod is provided on the outer wall of the helmet below the air inlet 2 for controlling the sliding of the gate 14. The gate 14 has the same grid-like perforation as the partition 15. The purpose of adjustment or opening and closing is achieved by controlling the overlap or staggering of the perforations of the gate 14 and the partition 15.

[0053] A slide plate 4 is slidably mounted on the partition 15 near the inner wall of the helmet. The slide plate 4 has the same grid-like perforations as the partition 15. A worm gear 5 is provided on the top side of the slide plate 4. A motor 6 is provided on one axial end of the worm gear 5. A worm 7 that cooperates with the worm gear 5 is provided on the output shaft of the motor 6. A spring 8 for eliminating vibration is installed on the side wall of the slide plate 4 away from the motor 6. The side of the spring 8 away from the slide plate 4 is connected to the side wall of the air inlet 2 of the helmet body 1. The spring 8 can cancel the vibration energy when the slide plate 4 is subjected to external force vibration and resonates, thereby preventing the slide plate 4 from making abnormal noise and resonance damage.

[0054] The partition 15 has rounded edges on each hole near the inner side of the helmet. The slide plate 4 has a flexible material at each hole interval that matches the rounded corners of the hole. Specifically, a self-lubricating silicone ring 9 can be used. When the slide plate 4 slides under the drive of the motor 6 until the holes of the slide plate 4 and the partition 15 are completely intersected, the self-lubricating silicone ring 9 or protrusion on the slide plate 4 completely fills the rounded corners of each hole edge on the partition 15, thereby achieving sealing and sound insulation.

[0055] When a motorcyclist uses voice navigation while riding, the helmet's speaker receives a signal to emit a voice message when the motorcycle reaches the preset location in the navigation program. Before the speaker emits a voice message, it sends a signal to the reminder device 16, causing the device to vibrate and transmit the signal to the rider via bone conduction. Simultaneously, the speaker sends a signal to the motor 6 that drives the slide plate 4. The motor 6 rotates the worm gear 7, which in turn causes the rack and pinion 5 to slide linearly, thus driving the slide plate 4 until the gap between the slide plate 4 and the partition 15 is completely intersected, achieving a sealed and soundproof air intake 2. The speaker then emits a voice message to announce the navigation information to the rider. Because the air intake 2 is now sealed, the rider receives a relatively clear navigation voice message.

[0056] After the sound-generating unit finishes its operation, it sends a signal to the motor 6 driving the slide plate 4. The motor 6 drives the worm gear 7 to rotate in the opposite direction. The reverse rotation of the worm gear 7 drives the worm rack 5 to slide linearly in the opposite direction, thereby driving the slide plate 4 to slide until the gap between the slide plate 4 and the partition 15 is completely overlapped. At this point, the air intake 2 can start to intake normally. At the same time, the sound-generating unit sends a signal to the reminder device 16, which vibrates and transmits the reminder signal to the driver through bone conduction, reminding the driver that the voice signal broadcast has ended. The driver can then fully concentrate on driving instead of waiting for the voice signal. Because people perceive bone conduction signals and sound wave signals differently, even if the vibration signal power of bone conduction is low, the driver can easily and quickly distinguish the difference, avoiding the use of harsh start and end prompts, and thus preventing the driver from being suddenly startled.

[0057] As another embodiment of the present invention, refer to Figures 1 to 9 :

[0058] Motorcycle drivers can actively send wake-up calls to the navigation system via the radio unit while riding, such as by voice querying remaining mileage, estimated arrival time, and destination traffic conditions. They can also send wake-up calls to the radio unit according to the navigation system's preset program to wake up the navigation system. Since the wake-up calls are usually short phrases such as "Hello," "Navigation," or "Start," the radio unit can accurately acquire the wake-up calls and wake up the navigation system.

[0059] After the radio unit receives a definite wake-up signal, the sound unit sends a signal to the motor 6 that drives the slide plate 4. The motor 6 drives the worm gear 7 to rotate, and the rotation of the worm gear 7 drives the worm rack 5 to slide linearly, thereby driving the slide plate 4 to slide until the gap between the slide plate 4 and the partition plate 15 is completely intersected, thereby achieving the sealing and sound insulation of the air inlet 2. At this time, the radio unit can accurately acquire more complex voice signals to seek information from the navigation system.

[0060] At the same time, the radio unit sends a signal to the reminder device 16, which vibrates. The vibration transmits the reminder signal to the driver via bone conduction, reminding the driver that the navigation system has been activated. The driver can then input voice messages normally in a relatively quiet radio environment. Once the radio unit obtains the correct voice information, it requests the corresponding navigation information from the navigation system. At this point, the radio unit sends a signal to the reminder device 16, which vibrates. The vibration transmits the reminder signal to the driver via bone conduction, reminding the driver that the navigation system has received accurate information. The driver can then fully concentrate on driving without needing to continue inputting voice signals to the radio unit or waiting for the navigation system's voice response.

[0061] After the sound unit stops working, it sends a signal to the motor 6 that drives the slide plate 4. The motor 6 drives the worm gear 7 to rotate in the opposite direction. The reverse rotation of the worm gear 7 drives the worm rack 5 to slide linearly in the opposite direction, thereby driving the slide plate 4 to slide until the gap between the slide plate 4 and the partition plate 15 completely overlaps. At this point, the air inlet 2 can start to intake air normally.

Claims

1. A motorcycle helmet based on voice navigation, comprising: The helmet body (1) is surrounded by a cavity for accommodating the driver's head and an observation port facing the driver's face. The bottom of the helmet is provided with a channel for the driver to put on and take off. The helmet body (1) is provided with an exhaust channel for ventilation and heat dissipation that runs through the helmet body (1). The exhaust channel includes at least one air inlet (2) and at least one air outlet (3) and a cavity between the air inlet (2) and the air outlet (3). The cavity is provided with a sound-generating unit and a sound-receiving unit for interacting with the navigation system. Its characteristic is that it further includes: The helmet body (1) is provided with an isolation and noise reduction device. The isolation and noise reduction device is used to actively isolate and reduce noise inside the helmet when the sound-generating unit or the sound-receiving unit interacts with the navigation system. The noise reduction device includes a sealing mechanism installed on the air inlet (2). The sealing mechanism is connected to the sound-generating unit and the sound-receiving unit via wired or wireless signals. The sealing mechanism can temporarily close the air inlet (2) after receiving a signal command from the sound-generating unit or the sound-receiving unit to temporarily isolate the noise entering the helmet body (1) through the air inlet (2). The sealing mechanism includes a drive source and at least one of the following: a mechanical translational sliding plate (4), a mechanical rotational sliding plate (4), an electromagnetic sliding plate (4), or an inflatable airbag that moves in accordance with the drive source.

2. A motorcycle helmet based on voice navigation according to claim 1, characterized in that: The transmission structure of the closed mechanism includes at least one set of transmission structures with worm gear and worm (7) in cooperation.

3. A motorcycle helmet based on voice navigation according to claim 2, characterized in that: The helmet is provided with a bone conduction reminder device (16) on the top or side for actively reminding the driver. The reminder device (16) is electrically connected to both the sound-generating unit and the sound-receiving unit. The reminder signal of the reminder device (16) is a short-time low-frequency vibration signal.

4. A motorcycle helmet based on voice navigation according to claim 1, characterized in that: The skateboard (4) is made of a self-lubricating material.

5. A motorcycle helmet based on voice navigation according to claim 1, characterized in that: Both the air inlet (2) and the sliding plate (4) of the sealing mechanism adopt a grid-type aperture. The width S1 of each pair of adjacent apertures on the air inlet (2) is exactly greater than or equal to the width S2 of the aperture on the sliding plate (4). The adjacent apertures on the sliding plate (4) are provided with a sealing structure for cooperating to seal the aperture of the air inlet (2).

6. A motorcycle helmet based on voice navigation according to claim 1, characterized in that: The skateboard (4) is equipped with an elastic structure for eliminating potential resonance.

7. A motorcycle helmet based on voice navigation according to claim 1, characterized in that: The exhaust port (3) of the exhaust channel is provided with an active anti-fog structure, which is used to prevent water mist from condensing on the transparent shielding structure of the observation port during the brief sound insulation period when the air inlet is closed by the sealing mechanism.

8. A motorcycle helmet based on voice navigation according to claim 7, characterized in that: The active anti-fog structure includes an air guide plate (10) set on the air outlet. The air guide plate (10) is a perforated arc-shaped cover structure and covers the air outlet. The air guide plate (10) and the outer surface of the helmet body (1) near the air outlet form a defogging channel that guides the airflow. The air guide plate (10) has at least one inlet (11) and at least one outlet (12). The positions of the inlet (11) and outlet (12) are staggered from the air outlet of the helmet body (1). The cross-sectional area A1 of the inlet (11) end of the defogging channel is greater than or equal to the cross-sectional area A2 of the outlet (12) end, and the vertical height of the outlet (12) end of the defogging channel is lower than that of the inlet (11) end. The positions of the inlet (11) and outlet (12) are both provided with airflow curves to reduce wind noise.

9. A motorcycle helmet based on voice navigation according to claim 8, characterized in that: The outlet (12) is provided with a guide plate (13), and the guide plate (13) and the air guide plate (10) form an angle with a large gap at the inlet (11) end and a small gap at the outlet (12) end.

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