Tire pressure sensor and tire thereof

Abstract

The invention discloses a tire pressure sensor and a tire thereof.The tire pressure sensor comprises a shell assembly and a tire pressure detection assembly, the shell assembly is internally provided with a containing space, the tire pressure detection assembly is assembled in the containing space, and the tire pressure detection assembly comprises an electric control board, a detection element and an onboard antenna; the detection element and the onboard antenna are both electrically connected with the electric control board, and the onboard antenna is vertically connected to the electric control board. According to the mode, the onboard antenna is vertically connected to the electric control board, so that no extra detouring space needs to be reserved around the electric control board, the utilization rate of the containing space is improved, the onboard antenna is smaller than an antenna with the same transmitting power in size, the size of the tire pressure detection assembly is reduced, and the tire pressure detection assembly is convenient to use. And the miniaturization of the tire pressure sensor is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of tire pressure monitoring, and particularly to a tire pressure sensor and a tire thereof. Background Art

[0002] Tire pressure is crucial for the safe driving of an automobile. Too high or too low tire pressure may cause tire blowout or puncture. A tire pressure detection system composed of a tire pressure sensor and other control components can automatically detect the tire pressure during the driving of the automobile, enabling the driver to know the change of the tire pressure at any time, and alarming for tire air leakage and low pressure to ensure driving safety. In the existing tire pressure sensors, the antenna is arranged around the circuit board. Since electronic components are installed on the circuit board, the electronic components will hinder the installation of the antenna, so that each turn of the antenna coil needs to bypass each electronic component on the circuit board, resulting in a relatively large winding space formed by each turn of the coil and the circuit board, and the total wire length of the antenna is certain, resulting in a relatively large volume of the antenna, so that it is difficult to miniaturize the tire pressure sensor. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a tire pressure sensor and a tire thereof to solve the technical problem that the antenna in the existing tire pressure sensor is relatively large in volume, so that it is difficult to miniaturize the tire pressure sensor.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] In a first aspect, an embodiment of the present invention provides a tire pressure sensor, including: a housing assembly and a tire pressure detection assembly. An accommodation space is provided in the housing assembly, and the tire pressure detection assembly is assembled in the accommodation space. The tire pressure detection assembly includes: an electronic control board, a detection element and an on-board antenna. The detection element and the on-board antenna are both electrically connected to the electronic control board, and the on-board antenna is vertically connected to the electronic control board.

[0006] In a specific embodiment, the on-board antenna includes: a substrate and a radiation element. The radiation element is attached to the substrate. The radiation element includes a plurality of radiation patches, and the plurality of radiation patches are electrically connected to each other and arranged on the periphery of the substrate.

[0007] In a specific embodiment, a first connection portion is provided at the bottom of the substrate, and a first opening is provided at the position of the electronic control board corresponding to the first connection portion. The first connection portion is inserted into the first opening.

[0008] In a specific embodiment, the radiation patch extends to the first connection portion.

[0009] In a specific embodiment, the housing assembly includes: an upper shell and a bottom cover. The upper shell covers the bottom cover to form the accommodation space. The upper shell is provided with a protection groove, and the board antenna extends into the protection groove.

[0010] In a specific embodiment, the tire pressure sensor further includes: a valve stem and a fastener. An adjustment groove is provided in the upper shell, and one end of the fastener passes through the adjustment groove and is connected to the valve stem.

[0011] In a specific embodiment, the fastener is provided with a fitting portion corresponding to the position of the adjustment groove. The fitting portion is fitted in the adjustment groove, and the width of the fitting portion is adapted to the width of the adjustment groove.

[0012] In a specific embodiment, a connection cavity is provided on one side of the upper shell close to the valve stem. The adjustment groove communicates with the connection cavity. A connection head is provided at the position of the valve stem corresponding to the connection cavity. One end of the fastener passes through the adjustment groove and the connection cavity, so that the connection head is connected to the connection cavity.

[0013] In a specific embodiment, the inner wall of the connection cavity and the outer wall of the connection head have the same curvature.

[0014] In a second aspect, an embodiment of the present invention provides a tire, including: a wheel hub and at least one tire pressure sensor as described above. The tire pressure sensor is assembled on the wheel hub, and a part of the structure of the tire pressure sensor is located inside the wheel hub.

[0015] Advantages of the present invention:

[0016] Compared with the prior art, in the tire pressure sensor proposed by the present invention, the board antenna is vertically connected to the electronic control board, so that no additional detour space needs to be reserved around the electronic control board, improving the utilization rate of the accommodation space. And the board antenna is smaller in volume than an antenna with the same transmission power, thereby reducing the volume of the tire pressure detection component and realizing the miniaturization of the tire pressure sensor.

[0017] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a tire pressure sensor proposed by an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the housing assembly in a tire pressure sensor proposed by an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the separation structure of the housing assembly, valve nozzle and fastener in a tire pressure sensor proposed for an invention embodiment;

[0021] Figure 4 Schematic diagram of the tire pressure detection component structure in a tire pressure sensor proposed for an invention embodiment;

[0022] Figure 5 Schematic diagram of the on-board antenna structure in a tire pressure sensor proposed for an invention embodiment;

[0023] Figure 6 Schematic diagram of the connection relationship structure between the on-board antenna and the electronic control board in a tire pressure sensor proposed for an invention embodiment;

[0024] Figure 7 Schematic diagram of the overall structure of a tire proposed for an invention embodiment.

[0025] Description of the reference numerals:

[0026] 10, tire pressure sensor; 11, housing assembly; 111, upper shell; 1111, adjustment groove; 1112, connection cavity; 1113, protection groove; 1114, through hole; 112, bottom cover; 113, accommodation space; 12, tire pressure detection component; 121, electronic control board; 1211, first opening; 1212, second opening; 122, detection element; 123, on-board antenna; 1231, substrate; 12311, first connection part; 12312, second connection part; 1232, radiation element; 12321, radiation patch; 1233, first end; 1234, transition section; 1235, second end; 124, power supply; 13, valve nozzle; 131, connection head; 14, fastener; 141, fitting part; 1411, limiting surface; 20, wheel hub. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. These terms are only used for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0031] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be construed in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0034] Embodiment

[0035] In a first aspect, please refer to Figures 1 to 6 , an embodiment of the present invention provides a tire pressure sensor 10, including: a housing assembly 11 and a tire pressure detection assembly 12. An accommodation space 113 is provided in the housing assembly 11, and the tire pressure detection assembly 12 is assembled in the accommodation space 113. The tire pressure detection assembly 12 includes: an electronic control board 121, a detection element 122, and an on-board antenna 123. The detection element 122 and the on-board antenna 123 are both electrically connected to the electronic control board 121, and the on-board antenna 123 is vertically connected to the electronic control board 121.

[0036] It should be specifically noted that a through hole 1114 corresponding to the detection element 122 is provided on the upper shell 111 of the housing assembly 11. When the tire pressure sensor 10 is applied in a tire, the gas inside the tire contacts the detection element 122 through the through hole 1114, and at the same time, the air pressure and temperature inside the tire are measured.

[0037] Specifically, the on-board antenna 123 is vertically connected to the electronic control board 121, avoiding mutual interference between the on-board antenna 123 and the electronic components on the electronic control board 121, and improving the stability of signal transmission. At the same time, the on-board antenna 123 does not need to surround the electronic control board 121, so there is no need to reserve additional detour space around the electronic control board 121, improving the utilization rate of the accommodation space 113. And the on-board antenna 123 is smaller in volume than an antenna with the same transmission power, thus reducing the volume of the tire pressure detection assembly 12 and realizing the miniaturization of the tire pressure sensor 10.

[0038] For the tire pressure sensor 10 provided in this embodiment, the on-board antenna 123 is vertically connected to the electronic control board 121, so there is no need to reserve additional detour space around the electronic control board 121, improving the utilization rate of the accommodation space 113. And the on-board antenna 123 is smaller in volume than an antenna with the same transmission power, thus reducing the volume of the tire pressure detection assembly 12 and realizing the miniaturization of the tire pressure sensor 10.

[0039] Please refer to Figure 5, the on-board antenna 123 includes: a substrate 1231 and a radiation element 1232. The radiation element 1232 is attached to the substrate 1231. The radiation element 1232 includes a plurality of radiation patches 12321, and the plurality of radiation patches 12321 are electrically connected to each other and arranged along the periphery of the substrate 1231.

[0040] Specifically, the on-board antenna 123 is based on the wavelength shortening principle to reduce the propagation speed of electromagnetic waves, concentrate the electric field at the interface between the radiation element 1232 and the substrate 1231, reduce the edge radiation loss, improve the radiation efficiency, increase the energy distribution in space, improve the radiation efficiency of the on-board antenna 123, and is smaller in physical volume than an antenna with the same transmitting power, realizing the miniaturization of the antenna. Moreover, after the plurality of radiation patches 12321 are electrically connected to each other, an integral radiation system can be formed within the operating frequency band. When current flows through the radiation patches 12321, each radiation patch 12321 will generate electromagnetic radiation, causing the radiation patches 12321 to generate a cooperative radiation effect within the operating frequency band, enabling the electromagnetic waves to superimpose and interfere with each other in space, radiating outward in a specific direction and intensity, sending out the signal, keeping the radiation performance of the antenna stable, arranging the patches along the edge of the substrate 1231, increasing the radiation area of the on-board antenna 123, exciting a circular surface current, and the radiation fields superimposing in the direction perpendicular to the plane of the substrate 1231, reducing the signal loss and improving the signal transmission quality.

[0041] Preferably, in this embodiment, the material of the substrate 1231 is PCB material. The PCB material has a stable dielectric constant and a low loss factor, enabling the stable propagation of electromagnetic waves in the dielectric layer, reducing the attenuation and distortion of signals during transmission, ensuring the radiation efficiency and signal quality of the on-board antenna 123. At the same time, the PCB material has high mechanical strength and rigidity, which can provide stable physical support for the radiation element 1232, thus ensuring the use stability of the on-board antenna 123. The PCB material is easy to process and manufacture the on-board antenna 123, reducing the production cost.

[0042] Please refer to Figure 5 and Figure 6 , a first connection portion 12311 is provided at the bottom of the substrate 1231, and a first opening 1211 is provided at the position of the electronic control board 121 corresponding to the first connection portion 12311, and the first connection portion 12311 is inserted into the first opening 1211.

[0043] Specifically, the first connection portion 12311 at the bottom of the substrate 1231 cooperates with the first opening 1211 on the electronic control board 121 to achieve a firm connection between the on-board antenna 123 and the control unit, avoiding the loosening or falling off of the connection caused by factors such as vibration, thereby improving the working stability of the antenna.

[0044] Preferably, in this embodiment, a second connecting portion 12312 is further provided at the bottom of the substrate 1231. A second opening 1212 is provided at the position of the electronic control board 121 corresponding to the second connecting portion 12312. The second connecting portion 12312 is inserted into the second opening 1212. By the cooperation of the insertion of the second connecting portion 12312 into the second opening 1212 and the insertion of the first connecting portion 12311 into the first opening 1211, a double-point fixed connection between the on-board antenna 123 and the electronic control board 121 is realized, further improving the connection stability between the on-board antenna 123 and the electronic control board 121.

[0045] Please refer to again Figure 2 , in an embodiment, a second connecting portion 12312 is also provided on the other side of the bottom of the substrate 1231. The second connecting portions 12312 on both sides of the substrate 1231 are symmetric about the first connecting portion 12311. A feed source (not shown in the figure) is assembled on the second connecting portion 12312 on one side of the bottom of the substrate 1231, and a ground electrode (not shown in the figure) is assembled on the second connecting portion 12312 on the other side of the bottom of the substrate 1231. By symmetrically arranging the feed source and the ground electrode on both sides of the substrate 1231, interference and noise during signal transmission are reduced, the stability and reliability of the signal are improved, so that each component can be reasonably arranged under the condition that the accommodation space 113 is limited, the space utilization rate is improved, and the on-board antenna 123 is made more compact.

[0046] Please refer to Figure 6 , the radiation patch 12321 extends to the first connecting portion 12311. By extending the radiation patch 12321 to the first connecting portion 12311, the radiation frequency of the on-board antenna 123 is increased under the condition that the accommodation space 113 is limited, so that the on-board antenna 123 of this embodiment can send a stronger signal under the same power input or realize communication at a farther distance.

[0047] Please refer to Figure 5 , in an embodiment, the on-board antenna 123 includes: opposite first end 1233, second end 1235 and transition section 1234. One end of the transition section 1234 is connected to the first end 1233, and the other end of the transition section 1234 is connected to the second end 1235. The horizontal height of the first end 1233 is higher than that of the second end 1235.

[0048] Specifically, the horizontal height of the first end 1233 of the on-board antenna 123 is higher than that of the second end 1235 of the on-board antenna 123, which changes the current distribution and electromagnetic field radiation pattern of the on-board antenna 123 in space. The height difference between the first end 1233 and the second end 1235 of the on-board antenna 123 causes differences in the propagation path and phase of electromagnetic waves between the first end 1233 and the second end 1235 when the on-board antenna 123 is working, thereby optimizing the radiation pattern of the on-board antenna 123, enabling the signal to be radiated more concentratedly in a specific direction, enhancing the signal strength in the target area, and improving the directivity and coverage of the radiation of the on-board antenna 123. Moreover, when current flows in the antenna, the transition section 1234, as an intermediate connection part, can smoothly guide the current from the first end 1233 to the second end 1235, reducing the reflection and scattering of electromagnetic waves at the connection, thereby reducing signal loss and improving the radiation efficiency of the on-board antenna 123.

[0049] Please refer to Figure 2 , the housing assembly 11 includes: an upper shell 111 and a bottom cover 112. The upper shell 111 covers the bottom cover 112 to form an accommodation space 113. The upper shell 111 is provided with a protection groove 1113, and the on-board antenna 123 extends into the protection groove 1113.

[0050] Specifically, the on-board antenna 123 is vertically connected to the electronic control board 121 and placed in the protection groove 1113 of the upper shell 111, improving the utilization rate of the accommodation space 113 and making the structure of the entire tire pressure sensor 10 more compact. The on-board antenna 123 extends into the protection groove 1113 of the upper shell 111, reducing the electromagnetic interference between the on-board antenna 123 and other electronic components on the electronic control board 121 and improving the stability of signal transmission.

[0051] Please refer to Figure 4 , in this embodiment, the tire pressure detection assembly 12 further includes: a power supply 124. The power supply 124 is electrically connected to the electronic control board 121, the detection element 122, and the on-board antenna 123 and supplies power to the electronic control board 121, the detection element 122, and the on-board antenna 123. In the accommodation space 113, the battery and the electronic control board 121 are symmetrically arranged along the length direction of the bottom cover 112, realizing a reasonable layout of each component within the limited accommodation space, improving the space utilization rate. At the same time, the symmetrical arrangement of the battery and the electronic control board 121 can balance the weight distribution inside the tire pressure sensor 10, enabling it to maintain good dynamic balance during high-speed rotation of the tire, reducing vibration or shaking caused by internal structural eccentricity, and improving the working stability of the sensor.

[0052] Please refer to Figure 1 and Figure 2, the tire pressure sensor 10 further includes: a valve stem 13 and a fastener 14. The upper shell 111 is provided with an adjustment groove 1111, and one end of the fastener 14 passes through the adjustment groove 1111 and is connected to the valve stem 13.

[0053] Specifically, the valve stem 13 is connected to the housing assembly 11 through the fastener 14, which facilitates the installation and removal of the tire pressure sensor 10 on the tire. The upper shell 111 is provided with an adjustment groove 1111 to increase the swinging range of the fastener 14 in the lateral direction, thereby improving the adaptability of the tire pressure sensor 10 and making it applicable to various wheel rims. When the angle of the wheel rim is small, the valve stem 13 moves downward under the action of an external force. When the angle of the wheel rim is large, the process is opposite to the above.

[0054] Please refer to Figure 2 and Figure 3 , the fastener 14 is provided with a fitting portion 141 at a position corresponding to the adjustment groove 1111. The fitting portion 141 is fitted in the adjustment groove 1111, and the width of the fitting portion 141 is adapted to the width of the adjustment groove 1111.

[0055] Specifically, at least one limiting surface 1411 is provided on the peripheral side of the fitting portion 141. The limiting surface 1411 cooperates with the corresponding side wall of the adjustment groove 1111 to limit and stop the rotation of the fastener 14. In this embodiment, four limiting surfaces 1411 are provided on the peripheral side of the fitting portion 141, and the width of the fitting portion 141 is adapted to the width of the adjustment groove 1111. When the fastener 14 passes through the adjustment groove 1111 and is connected to the valve stem 13, the fitting portion 141 on the fastener 14 is fitted in the adjustment groove 1111 at this time, and the limiting surfaces 1411 are in contact with the two side walls of the adjustment groove 1111, thereby preventing the fastener 14 from rotating relative to the adjustment groove 1111.

[0056] Please refer to Figure 3 , a connection cavity 1112 is provided on one side of the upper shell 111 close to the valve stem 13. The adjustment groove 1111 is communicated with the connection cavity 1112. A connection head 131 is provided on the valve stem 13 corresponding to the connection cavity 1112. One end of the fastener 14 passes through the adjustment groove 1111 and the connection cavity 1112, so that the connection head 131 is connected to the connection cavity 1112.

[0057] Specifically, the fastener 14 sequentially passes through the adjustment slot 1111 and the connection cavity 1112 of the upper housing 111 and is connected to the connector 131 on the valve stem 13, forming a relatively locked mechanical structure, enabling the tire pressure sensor 10 to be stably installed on the tire and avoiding the phenomenon that the tire pressure sensor 10 loosens or falls off due to factors such as vibration, centrifugal force or tire deformation during vehicle driving. At the same time, the connection cavity 1112 provides a precise docking space for the connection between the fastener 14 and the connector 131, ensuring that the fastener 14 can accurately connect to the connector 131 and realizing the firm connection between the housing assembly 11 and the valve stem 13.

[0058] In this embodiment, the inner wall of the connection cavity 1112 has the same curvature as the outer wall of the connector 131, making the stress distribution uniform on the contact surface between the connector 131 and the connection cavity 1112. When subjected to the centrifugal force generated by tire rotation or the vibration during vehicle driving, the stress can be evenly transmitted to the entire contact surface instead of concentrating in a certain local area, avoiding the occurrence of stress concentration and improving the connection stability between the valve stem 13 and the housing assembly 11.

[0059] In a second aspect, please refer to Figure 7 , an embodiment of the present invention provides a tire, including: a wheel hub 20 and at least one tire pressure sensor 10 as described above. The tire pressure sensor 10 is assembled on the wheel hub 20, and a part of the structure of the tire pressure sensor 10 is located inside the wheel hub 20.

[0060] Specifically, since the tire pressure sensor 10 is applied to the tire, the beneficial effects of the tire are the same as those of the tire pressure sensor 10.

[0061] Compared with the prior art, for the tire pressure sensor 10 proposed by the present invention, the board-mounted antenna 123 is vertically connected to the electronic control board 121, so that no additional detour space needs to be reserved around the electronic control board 121, improving the utilization rate of the accommodation space 113. And the board-mounted antenna 123 is smaller in volume than an antenna with the same transmission power, thus reducing the volume of the tire pressure detection component 12 and realizing the miniaturization of the tire pressure sensor 10.

[0062] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tire pressure sensor, characterized in that, Comprising: A housing assembly and a tire pressure detection assembly. An accommodation space is provided inside the housing assembly, and the tire pressure detection assembly is assembled in the accommodation space. The tire pressure detection assembly includes: an electronic control board, a detection element, and an on-board antenna. The detection element and the on-board antenna are both electrically connected to the electronic control board, and the on-board antenna is vertically connected to the electronic control board.

2. The tire pressure sensor according to claim 1, wherein The on-board antenna includes: a substrate and a radiation element. The radiation element is attached to the substrate. The radiation element includes a plurality of radiation patches, and the plurality of radiation patches are electrically connected to each other and arranged along the periphery of the substrate.

3. The tire pressure sensor according to claim 2, wherein A first connection portion is provided at the bottom of the substrate. A first opening is provided at the position of the electronic control board corresponding to the first connection portion, and the first connection portion is inserted into the first opening.

4. The tire pressure sensor according to claim 3, characterized in that, The radiation patch extends to the first connection portion.

5. The tire pressure sensor according to claim 1, characterized in that, The housing assembly includes: an upper shell and a bottom cover. The upper shell covers the bottom cover to form the accommodation space. A protection groove is provided inside the upper shell, and the on-board antenna extends into the protection groove.

6. The tire pressure sensor according to claim 5, characterized in that The tire pressure sensor further includes: a valve stem and a fastener. An adjustment groove is provided on the upper shell, and one end of the fastener passes through the adjustment groove and is connected to the valve stem.

7. The tire pressure sensor according to claim 6, wherein A fitting portion is provided at the position of the fastener corresponding to the adjustment groove. The fitting portion is fitted in the adjustment groove, and the width of the fitting portion is adapted to the width of the adjustment groove.

8. The tire pressure sensor according to claim 6, wherein A connection cavity is provided on one side of the upper shell close to the valve stem. The adjustment groove communicates with the connection cavity. A connection head is provided at the position of the valve stem corresponding to the connection cavity. One end of the fastener passes through the adjustment groove and the connection cavity, so that the connection head is connected to the connection cavity.

9. The tire pressure sensor according to claim 8, characterized in that, The inner wall of the connection cavity has the same curvature as the outer wall of the connection head.

10. A tire, characterized in that, Comprising: A wheel hub and at least one tire pressure sensor according to any one of claims 1 to 9. The tire pressure sensor is assembled on the wheel hub, and a part of the structure of the tire pressure sensor is located inside the wheel hub.

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