Tire pressure sensor, wheel and vehicle

Abstract

The utility model discloses a tire pressure sensor, a wheel and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that an existing tire pressure sensor is poor in accuracy and reliability. The tire pressure sensor comprises a shell and a breathable film. The tire pressure communication cavity and the reference cavity are located on the two sides of the detection film respectively, and the tire pressure communication cavity is communicated with the inner space of the tire. The shell is provided with at least one first air hole communicating the reference cavity with the external space of the tire. The breathable film is arranged in at least one first breathable hole. The tire pressure sensor disclosed by the utility model can be used for monitoring the tire pressure of a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a tire pressure sensor, a wheel and a vehicle. Background Art

[0002] To ensure safe driving, vehicles are equipped with tire-pressure monitoring systems (TPMS) to monitor tire pressure, temperature, and other parameters in real time. In such systems, each tire is equipped with a corresponding tire pressure sensor. Whether the vehicle is moving or stationary, the tire pressure sensor automatically monitors tire pressure and temperature in real time and issues an alarm if tire pressure or temperature is abnormal, thus preventing traffic accidents caused by tire failure and ensuring driving safety.

[0003] However, existing tire pressure sensors have poor accuracy and reliability. Utility Model Content

[0004] The purpose of the utility model is to provide a tire pressure sensor, a wheel and a vehicle, aiming to solve the problem of poor accuracy and reliability of existing tire pressure sensors.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the present application provides a tire pressure sensor comprising a housing and a breathable membrane. The housing includes a detection membrane, and a tire pressure communication cavity and a reference cavity located on either side of the detection membrane. The tire pressure communication cavity communicates with the interior of the tire. The housing is provided with at least one first breathable hole connecting the reference cavity with the exterior of the tire. The breathable membrane is disposed in the at least one first breathable hole.

[0007] The housing of the tire pressure sensor provided in the embodiment of the present application includes a detection membrane and a tire pressure communication cavity and a reference cavity respectively located on both sides of the detection membrane, which can monitor the pressure of the tire pressure communication cavity and the pressure of the reference cavity to ensure that the tire pressure is in a normal state. The reference cavity can slowly release gas to the external space of the tire through the first air vent to achieve air pressure balance between the reference cavity and the tire pressure communication cavity, avoiding detection errors of the tire pressure sensor and transmission of erroneous detection signals. A breathable membrane is provided at the first air vent to prevent water vapor, dust and other debris from entering the tire pressure sensor, avoid clogging of the first air vent, ensure the normal air pressure of the reference cavity, ensure the normal operation of the tire pressure sensor, and improve the accuracy and reliability of the tire pressure sensor. In addition, the tire pressure sensor can be protected from the influence of the external environment, avoid damage to the electronic components inside the tire pressure sensor, further improve the reliability of the tire pressure sensor, and extend the service life of the tire pressure sensor.

[0008] In some embodiments, the housing includes a first wall panel, at least one first air permeability hole is provided on the first wall panel, and a breathable membrane is provided on an inner side of the first wall panel and covers the at least one first air permeability hole.

[0009] In some embodiments, the breathable membrane further includes an adhesive layer, which is disposed between the breathable membrane and the first wall panel, and the breathable membrane is bonded to the first wall panel via the adhesive layer.

[0010] In some embodiments, the tire pressure sensor further includes a partition disposed within the housing and spaced apart from the first wall. The reference cavity includes a secondary cavity and a main cavity. The secondary cavity is located between the first wall and the partition, and at least one first air vent communicates with the secondary cavity. The main cavity is located on the side of the partition facing away from the secondary cavity. The main and secondary cavities are connected via a capillary structure.

[0011] In some embodiments, the tire pressure sensor includes a processing circuit, and the processing circuit is housed in the sub-cavity.

[0012] In some embodiments, the tire pressure sensor further includes a signal transmitter, the signal transmitter being configured to transmit a first signal, the first signal being configured to indicate a detection result of the detection component, and the signal transmitter being housed in the sub-cavity.

[0013] In some embodiments, the capillary structure includes a communicating channel extending in a spiral shape, and the main cavity and the sub-cavity are connected through the communicating channel.

[0014] In some embodiments, the tire pressure sensor further comprises a fixing member disposed on a side of the breathable membrane facing away from the first wall plate, and the fixing member is fixed relative to the first wall plate. At least one second breathable hole is provided at a position of the fixing member opposite to the at least one first breathable hole.

[0015] In some embodiments, at least one support leg is provided on a side of the fixing member facing away from the first wall panel, one end of the support leg is connected to the fixing member, and the other end is in contact with the partition.

[0016] In some embodiments, the tire pressure sensor further includes a detection component for detecting the internal pressure of the tire pressure communication cavity.

[0017] In a second aspect, the present application provides a wheel comprising a tire and any one of the tire pressure sensors described above, wherein the tire pressure sensor is connected to the tire, and a tire pressure communication cavity of the tire pressure sensor is connected to an internal space of the tire.

[0018] In a third aspect, the present application provides a vehicle comprising a vehicle body and the above-mentioned wheels, wherein the wheels are connected to the vehicle body.

[0019] The technical effects brought about by any implementation of the second to third aspects mentioned above can refer to the technical effects brought about by the corresponding implementation in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic diagram of the structure of a tire pressure sensor provided in the related art;

[0022] Figure 2 A schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0023] Figure 3 for Figure 2 A schematic structural diagram of a wheel of a vehicle is shown;

[0024] Figure 4 for Figure 3 A schematic structural diagram of a tire pressure sensor of a wheel is shown;

[0025] Figure 5 for Figure 4 A cross-sectional schematic diagram of a tire pressure sensor is shown;

[0026] Figure 6 for Figure 5 A schematic structural diagram of the first wall plate and the breathable membrane of the tire pressure sensor is shown;

[0027] Figure 7 for Figure 6 A schematic structural diagram of the breathable membrane of the tire pressure sensor is shown;

[0028] Figure 8 for Figure 3 A schematic structural diagram of the tire pressure sensor fixing member, the first wall plate and the breathable membrane is shown;

[0029] Figure 9 for Figure 8 An exploded schematic diagram of the fixing member, the first wall panel and the breathable membrane is shown.

[0030] Reference numerals:

[0031] 1. Housing; 2. Alarm circuit board; 3. Battery; 4. Elastic conductive sheet; 5. Reference cavity assembly; 6. Sealing ring;

[0032] 100. Vehicle; 10. Chassis; 20. Vehicle body; 30. Wheel; 31. Tire pressure sensor; 311. Housing; 3111. Tire pressure connecting chamber; 3112. Reference chamber; 3113. First air vent; 3114. First wall panel; 3115. Sub-cavity; 3116. Main cavity; 3117. Connecting pipe; 3118. Detection membrane; 312. Breathable membrane; 3121. First avoidance hole; 3122. Adhesive layer; 3123. Second avoidance hole; 313. Detection assembly; 3131. Conductive spring; 3132. Conductive baffle; 314. Partition; 315. Processing circuit; 316. Signal transmitter; 317. Fixing member; 3171. Second air vent; 3172. Support leg; 3173. Connecting hole; 32. Tire. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "back," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or relative positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Unless otherwise specified, the above-mentioned directions may be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are met.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "communicated" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be directly connected, indirectly connected through an intermediary, or internally connected between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In the embodiments of the present invention, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, article, or device comprising the element.

[0038] In the embodiments of the present invention, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0039] To ensure safe driving, vehicles are equipped with tire-pressure monitoring systems (TPMS) to monitor tire pressure, temperature, and other parameters in real time. In such systems, each tire is equipped with a corresponding tire pressure sensor. While the vehicle is moving or stationary, the tire pressure sensor automatically monitors tire pressure and temperature in real time and issues an alarm if tire pressure or temperature becomes abnormal, thus preventing traffic accidents caused by tire failure and ensuring driving safety.

[0040] In the related art, see Figure 1 , Figure 1This is a schematic diagram of the structure of a tire pressure sensor provided in the related art. It includes a bottom nut that can be screwed onto the tire valve core and a housing 1 that screws onto the bottom nut. The bottom of the housing 1 is sealed to the bottom nut by a sealing ring 6. The internal space formed by the housing 1 and the bottom nut is installed, from top to bottom, with an alarm circuit board 2, a battery 3, an elastic conductive sheet 4, and a reference cavity assembly 5. The positive lead-in terminal of the alarm circuit board 2 is electrically connected to the positive terminal of the battery 3 below it, and the negative terminal of the alarm circuit board 2 is electrically connected to the elastic conductive sheet 4. The edge of the elastic conductive sheet 4 is sealed against the top of the reference cavity assembly 5, forming a reference cavity with the space at the top of the reference cavity assembly 5. When the elastic conductive sheet 4 bulges under pressure, it can be electrically connected to the negative terminal of the battery 3. The bottom of the reference cavity assembly 5 has an air inlet channel that connects to the reference cavity. The elastic conductive sheet 4 has a tiny exhaust damping hole that allows gas to penetrate from the reference cavity into the monitoring cavity.

[0041] However, due to the high dust content in the tire's operating environment, the air intake passage is easily blocked, resulting in abnormal reference chamber pressure, swelling of the elastic conductive sheet 4, and misidentification by the tire blowout monitoring sensor, which mistakenly triggers the runaway device to activate. The accuracy and reliability of this tire pressure sensor are poor.

[0042] Based on this, see Figure 2 , Figure 2 The present invention provides a schematic structural diagram of a vehicle 100 according to an embodiment of the present invention. The present invention provides a vehicle 100, which may include a chassis 10, a body 20, and wheels 30. It is understood that the vehicle 100 may be a fuel vehicle, an electric vehicle, a hybrid vehicle, a gas vehicle, a methanol vehicle, a solar vehicle, etc. For example, the vehicle 100 may be a passenger vehicle such as a sedan, a sport utility vehicle (SUV), or a multi-purpose vehicle (MPV), or may be a bus, a truck, a semi-trailer, etc. This application does not impose any specific restrictions on this.

[0043] The chassis 10 can be used to install a motor and other components of the vehicle 100 to form the overall shape of the vehicle 100 , and receive power from the motor to enable the vehicle 100 to move and ensure normal driving.

[0044] The vehicle body 20 can be mounted on the chassis 10. A cabin is formed within the vehicle body 20, which can accommodate a driver, passengers, or cargo. It should be noted that when the vehicle 100 is a bus or sedan, the vehicle body 20 is generally a monolithic structure. When the vehicle 100 is a truck, the vehicle body 20 is generally composed of a driver's cab and a cargo box.

[0045] See also Figure 3 , Figure 3 for Figure 2The diagram shows the structure of a wheel 30 of a vehicle 100. The wheel 30 can be mounted on the chassis 10 of the vehicle 100. The wheel 30 includes a tire 32 and a tire pressure sensor 31 connected to the tire 32. The tire pressure sensor 31 can detect the pressure within the tire 32 and promptly transmit an abnormality signal when the pressure or temperature of the tire 32 is abnormal, thereby avoiding traffic accidents caused by tire 32 failure and ensuring driving safety.

[0046] It should be noted that the above components are merely examples of some components of the vehicle 100 and are not limitations on the specific structure of the vehicle 100 .

[0047] For details, see Figure 4 as well as Figure 5 , Figure 4 for Figure 3 The schematic structural diagram of the tire pressure sensor 31 of the wheel 30 is shown. Figure 5 for Figure 4 The figure shows a cross-sectional schematic diagram of a tire pressure sensor 31, which includes a housing 311 and a breathable membrane 312. The housing 311 includes a detection membrane 3118 and a tire pressure communication cavity 3111 and a reference cavity 3112 located on either side of the detection membrane 3118. The tire pressure communication cavity 3111 communicates with the interior space of the tire 32.

[0048] The housing of the tire pressure sensor 31 provided in the embodiment of the present application includes a detection membrane 3118 and a tire pressure communication cavity 3111 and a reference cavity 3112 located on both sides of the detection membrane 3118, respectively. The pressure of the tire pressure communication cavity 3111 and the pressure of the reference cavity 3112 can be monitored to ensure that the tire pressure is in a normal state. The housing 311 is provided with at least one first air vent 3113 that connects the reference cavity 3112 with the external space of the tire 32. The air permeable membrane 312 is arranged in at least one first air vent 3113. The air permeable membrane 312 can allow gas to pass through, but prevent liquids and solid particles from entering the reference cavity 3112. Exemplarily, the material of the air permeable membrane 312 can be polyester PET, polyurethane PU, etc.

[0049] In this way, the reference cavity 3112 can slowly release gas to the external space of the tire 32 through the first air vent 3113, thereby achieving air pressure balance between the reference cavity 3112 and the tire pressure communication cavity 3111, thereby avoiding the tire pressure sensor 31 from identifying errors and transmitting erroneous detection signals.

[0050] Furthermore, a breathable membrane 312 is provided at the first air vent 3113 to prevent moisture and dust from entering the tire pressure sensor 31, thus preventing blockage of the first air vent 3113 and maintaining a normal air pressure in the reference chamber 3112. This ensures the proper functioning of the tire pressure sensor 31 and improves the accuracy and reliability of the tire pressure sensor 31. Furthermore, this protects the tire pressure sensor 31 from environmental influences, preventing damage to the electronic components within the tire pressure sensor 31 and extending the service life of the tire pressure sensor 31.

[0051] It should be noted that the reference cavity 3112 is typically separated from the main cavity 3116 by an elastic sealing membrane 3118. The air pressure in the reference cavity 3112 is in equilibrium with the air pressure in the tire pressure communication cavity 3111. In the event of an emergency situation involving rapid air leakage, such as a leak or blowout, the pressure inside the tire 32 may become abnormal, decreasing dramatically, and the air pressure in the tire pressure communication cavity 3111 may also drop sharply.

[0052] At this point, the pressure difference between the air pressure in reference chamber 3112 and the air pressure in tire pressure communication chamber 3111 is large, and reference chamber 3112 squeezes elastic sealing membrane 3118, causing it to deform toward tire pressure communication chamber 3111. The elastic sealing membrane 3118 squeezes tire pressure communication chamber 3111, and detection assembly 313 within tire pressure communication chamber 3111 can detect abnormal pressure within tire pressure communication chamber 3111 and transmit an abnormality signal to trigger the runaway tire prevention device, preventing accidents.

[0053] In some embodiments, see Figure 6 as well as Figure 7 , Figure 6 for Figure 5 The schematic diagram of the structure of the first wall plate 3114 and the breathable membrane 312 of the tire pressure sensor 31 is shown. Figure 7 for Figure 6 The diagram shows the structure of the breathable membrane 312 of the tire pressure sensor 31. The housing 311 includes a first wall panel 3114, which can serve as the top panel of the housing 311 to facilitate gas discharge. At least one first air hole 3113 is provided in the first wall panel 3114. The number of first air holes 3113 can be one or more, and this is not limited in this application. For example, the embodiments of this application are described with one first air hole 3113, but this does not constitute a limitation on this application.

[0054] The breathable membrane 312 is disposed on the inner side of the first wall plate 3114 and covers at least one first breathable hole 3113. The inner side of the first wall plate 3114 refers to the side of the first wall plate 3114 facing the reference cavity 3112.

[0055] In this way, the direct impact of the external environment on the breathable membrane 312 can be reduced, the speed of wear and aging of the breathable membrane 312 can be reduced, and the service life of the breathable membrane 312 can be extended.

[0056] In some other embodiments, the breathable membrane 312 may be disposed on the outer side of the first wall plate 3114 , wherein the outer side of the first wall plate 3114 refers to the side of the first wall plate 3114 facing away from the reference cavity 3112 .

[0057] In some other embodiments, the breathable membrane 312 may also be disposed within the first wall panel 3114 , wherein “within the first wall panel 3114 ” means that the breathable membrane 312 is directly embedded in the first wall panel 3114 .

[0058] In some embodiments, see Figure 6 as well as Figure 7 The breathable membrane 312 further includes an adhesive layer 3122 . The adhesive layer 3122 is disposed between the breathable membrane 312 and the first wall panel 3114 . The breathable membrane 312 is bonded to the first wall panel 3114 by means of the adhesive layer 3122 .

[0059] In this way, the sealing effect of the adhesive layer 3122 can effectively prevent moisture and dust from entering through the gap between the diaphragm and the wall panel, further improving the overall waterproof and dustproof performance.

[0060] In addition, the adhesive layer 3122 can provide a strong bond, allowing the breathable membrane 312 to be firmly attached to the first wall panel 3114, preventing the breathable membrane 312 from falling off or shifting during use. The use of the adhesive layer 3122 can simplify the installation process of the breathable membrane 312, reduce the need for additional fixing devices, and improve installation efficiency.

[0061] In some embodiments, see Figure 7 The adhesive layer 3122 also includes at least one first avoidance hole 3121. The at least one first avoidance hole 3121 is positioned opposite the at least one first ventilation hole 3113. This prevents the adhesive layer 3122 from interfering with gas flow, thereby improving gas flow efficiency. The first avoidance hole 3121 and the first ventilation hole 3113 are opposite each other, meaning that the projection of the first avoidance hole 3121 on the extended plane of the breathable membrane 312 overlaps with the projection of the first ventilation hole 3113 on the extended plane of the breathable membrane 312.

[0062] In some other embodiments, the breathable membrane 312 may also be connected to the first wall panel 3114 through other fixing devices, such as screws, etc.

[0063] In some embodiments, see Figure 5The tire pressure sensor 31 also includes a partition 314, which is disposed within the housing 311 and spaced apart from the first wall 3114. The reference cavity 3112 includes a sub-cavity 3115 and a main cavity 3116. The sub-cavity 3115 is located between the first wall 3114 and the partition 314. At least one first vent hole 3113 communicates with the sub-cavity 3115. The main cavity 3116 is located on the side of the partition 314 facing away from the sub-cavity 3115. The main cavity 3116 and the sub-cavity 3115 are connected by a capillary structure.

[0064] In this way, by providing a capillary structure, the gas in the main cavity 3116 is slowly released into the secondary cavity 3115 and then discharged through the first air vent 3113, balancing the air pressure between the main cavity 3116 and the tire pressure communication cavity 3111, thereby ensuring the detection accuracy of the detection assembly 313. In addition, because the air permeable membrane 312 is provided at the first air vent 3113, moisture and dust cannot enter the secondary cavity 3115, thus preventing blockage of the capillary structure and improving the reliability of the tire pressure sensor 31.

[0065] In some embodiments, the capillary structure includes a communicating channel 3117 extending in a spiral shape, and the main cavity 3116 and the sub-cavity 3115 are connected through the communicating channel 3117 .

[0066] In this way, the length of the connecting pipe 3117 is longer and the internal diameter is smaller, which can dampen the flow of gas and reduce the speed of gas flow.

[0067] In some other embodiments, the capillary structure may also include a Z-folded communicating channel 3117 .

[0068] In some embodiments, see Figure 5 The detection assembly 313 includes a conductive spring 3131 and a conductive baffle 3132. The conductive spring 3131 is provided on the side of the detection membrane 3118 facing the reference cavity 3112, and the conductive baffle 3132 is provided within the reference cavity 3112. When an accident occurs, the pressure within the tire 32 decreases sharply, and the pressure within the tire pressure communication cavity 3111 decreases accordingly. The pressure in the main cavity 3116 is much greater than the pressure within the tire pressure communication cavity 3111. Under the action of the pressure difference, the detection membrane 3118 deforms toward the tire pressure communication cavity 3111, causing the conductive spring 3131 to contact the conductive baffle 3132, energizing it and causing the tire pressure sensor 31 to emit a signal.

[0069] In some embodiments, see Figure 5 The tire pressure sensor 31 includes a processing circuit 315, which is accommodated in the sub-cavity 3115. The processing circuit 315 can be an alarm circuit, a transmitting circuit, etc.

[0070] Placing the processing circuit 315 within the secondary cavity 3115 can effectively prevent damage to the processing circuit 315 from external environmental factors such as moisture, dust, and chemicals, thereby extending the service life of the processing circuit 315. The overall structural design of the tire pressure sensor 31 can also be optimized, saving space and making the tire pressure sensor 31 more compact and easier to install.

[0071] In some embodiments, see Figure 5 The tire pressure sensor 31 further includes a signal transmitter 316 for transmitting a first signal, wherein the first signal is used to indicate the detection result of the detection component 313 . The signal transmitter 316 is accommodated in the sub-cavity 3115 .

[0072] In this way, sub-cavity 3115 provides a relatively isolated environment for signal transmitter 316, reducing the impact of external electromagnetic interference and vibration on signal transmission, and improving signal stability and accuracy. Furthermore, it prevents external environmental damage such as moisture, dust, and chemicals from damaging signal transmitter 316, ensuring long-term stable operation of signal transmitter 316.

[0073] Exemplarily, the signal transmitting device 316 may be an antenna, a Bluetooth transmitter, an ultrasonic sensor, or the like.

[0074] In some embodiments, see Figure 8 as well as Figure 9 , Figure 8 for Figure 3 The structure diagram of the fixing member 317, the first wall plate 3114 and the breathable membrane 312 of the tire pressure sensor 31 is shown. Figure 9 for Figure 8 The exploded view of the fixing member 317, the first wall panel 3114, and the breathable membrane 312 is shown. The tire pressure sensor 31 further includes a fixing member 317, which is disposed on a side of the breathable membrane 312 facing away from the first wall panel 3114 and is fixed relative to the first wall panel 3114. The fixing member 317 may have a connection hole, and the fixing member 317 may be connected to the first wall panel 3114 using screws, etc.

[0075] At least one second ventilation hole 3171 is provided at a position of the fixing member 317 opposite to the at least one first ventilation hole 3113. The second ventilation hole 3171 being opposite to the first ventilation hole 3113 means that the projection of the second ventilation hole 3171 on the extended plane of the ventilation membrane 312 overlaps with the projection of the first ventilation hole 3113 on the extended plane of the ventilation membrane 312.

[0076] In this way, the breathable membrane 312 is located between the fixing member 317 and the first wall plate 3114, and the breathable membrane 312 is fixed more firmly, preventing the breathable membrane 312 from falling off. By providing the second breathable hole 3171, the flow of gas is smoother, and the interference of the fixing member 317 on the gas flow is avoided, thereby improving the gas flow efficiency.

[0077] Correspondingly, the breathable membrane 312 and the adhesive layer 3122 may also be provided with corresponding second avoidance holes 3124 to facilitate the connection of the fixing member 317 .

[0078] In some embodiments, participating Figure 5 Combined with Figure 8 At least one support leg 3172 is provided on the side of the fixing member 317 facing away from the first wall panel 3114 , one end of the support leg 3172 is connected to the fixing member 317 , and the other end is in contact with the partition 314 .

[0079] In this way, the position between the fixing member 317 and the partition 314 is relatively fixed, which can prevent the partition 314 from being displaced and blocking the air vents during the driving of the vehicle 100.

[0080] It should be noted that the present application does not limit the number of legs 3172, which can be set according to actual needs. For example, the number of legs 3172 can be one, two, three, four, five, six, etc.

[0081] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0082] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A tire pressure sensor, characterized in that: include: A housing (311), the housing (311) comprising a detection membrane (3118) and a tire pressure communication cavity (3111) and a reference cavity (3112) respectively located on both sides of the detection membrane (3118), the tire pressure communication cavity (3111) being in communication with the interior space of the tire (32); and the housing (311) being provided with at least one first air vent (3113) for communicating with the reference cavity (3112) and the exterior space of the tire (32); A breathable membrane (312), wherein the breathable membrane (312) is arranged at the at least one first breathable hole (3113).

2. The tire pressure sensor according to claim 1, characterized in that The housing (311) comprises a first wall plate (3114), and the at least one first air vent (3113) is provided on the first wall plate (3114); The breathable membrane (312) is arranged on the inner side of the first wall plate (3114) and covers the at least one first breathable hole (3113).

3. The tire pressure sensor according to claim 2, characterized in that: Also includes: An adhesive layer (3122), the adhesive layer (3122) is arranged between the breathable membrane (312) and the first wall panel (3114), and the breathable membrane (312) is bonded to the first wall panel (3114) by means of the adhesive layer (3122).

4. The tire pressure sensor according to claim 3, characterized in that: The tire pressure sensor (31) further includes: a partition (314), the partition (314) being disposed in the housing (311) and spaced apart from the first wall plate (3114); The reference cavity (3112) comprises: a secondary cavity (3115), the secondary cavity (3115) being located between the first wall plate (3114) and the partition (314), the at least one first air vent (3113) being in communication with the secondary cavity (3115); A main cavity (3116), the main cavity (3116) is located on a side of the partition (314) facing away from the secondary cavity (3115); the main cavity (3116) and the secondary cavity (3115) are connected via a capillary structure.

5. The tire pressure sensor according to claim 4, characterized in that: The tire pressure sensor (31) comprises a processing circuit (315), and the processing circuit (315) is accommodated in the secondary cavity (3115).

6. The tire pressure sensor according to claim 5, characterized in that: The tire pressure sensor (31) further includes a signal transmitting device (316), the signal transmitting device (316) being used to transmit a first signal, the first signal being used to indicate a detection result of the detection component (313), the detection component (313) being used to detect the internal pressure of the tire pressure communication cavity (3111); the signal transmitting device (316) being accommodated in the sub-cavity (3115).

7. The tire pressure sensor according to claim 4, characterized in that: The capillary structure includes a connecting pipe (3117) extending in a spiral shape, and the main cavity (3116) and the auxiliary cavity (3115) are connected through the connecting pipe (3117).

8. The tire pressure sensor according to claim 4, characterized in that: The tire pressure sensor (31) further includes: A fixing member (317), the fixing member (317) being arranged on a side of the breathable membrane (312) facing away from the first wall plate (3114), and the fixing member (317) being fixed relative to the first wall plate (3114); and at least one second breathable hole (3171) being provided at a position of the fixing member (317) relative to the at least one first breathable hole (3113).

9. The tire pressure sensor according to claim 8, characterized in that: At least one support leg (3172) is provided on a side of the fixing member (317) facing away from the first wall panel (3114), one end of the support leg (3172) is connected to the fixing member (317), and the other end is in contact with the partition (314).

10. The tire pressure sensor according to claim 1, wherein: Also includes: A detection component (313) is used to detect the internal pressure of the tire pressure communication cavity (3111).

11. A wheel, characterized in that: include: Tire (32); The tire pressure sensor (31) according to any one of claims 1 to 10, wherein the tire pressure sensor (31) is connected to the tire (32), and the tire pressure communication cavity (3111) of the tire pressure sensor (31) is connected to the internal space of the tire (32).

12. A vehicle, characterized in that: include: body (20); The wheel (30) according to claim 11, wherein the wheel (30) is connected to the vehicle body (20).

Images