Tire pressure sensor and tire thereof

Abstract

The tire pressure sensor comprises a shell assembly and a tire pressure detection assembly, a containing space is arranged in the shell assembly, the tire pressure detection assembly is assembled in the containing space, the tire pressure detection assembly comprises an electric control board, a detection element and an onboard antenna, the electric control board is connected with the detection element, and the onboard antenna is connected with the detection element. 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 utility model relates to tire pressure monitoring technical field especially relates to a tire pressure sensor and its tire. BACKGROUND

[0002] Tire pressure has vital effect to the safe driving of car, and the tire pressure that is too high or too low can all lead to tire burst or tire breakage. The tire pressure detection system that tire pressure sensor combines with other control components can automatically detect the tire pressure during the driving of car, so that the driver can know the change of tire pressure at any time, and the tire pressure sensor can alarm for tire leakage and low pressure, and ensure the safety of driving. In the existing tire pressure sensor, the antenna is arranged around the circuit board, because the electronic components are installed on the circuit board, the electronic components will hinder the installation of the antenna, so that each coil of the antenna needs to bypass each electronic component on the circuit board, which leads to a larger bypass space formed by each coil and the circuit board, and the total length of the antenna is fixed, which leads to a larger volume of the antenna, so that the tire pressure sensor is difficult to be miniaturized. SUMMARY

[0003] The utility model discloses a tire pressure sensor and its tire to overcome the defects of prior art, and solve the technical problem that the volume of the antenna in the existing tire pressure sensor is large, so that the tire pressure sensor is difficult to be miniaturized.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] Firstly, the utility model discloses a tire pressure sensor, which comprises a shell assembly and a tire pressure detection assembly, wherein the shell assembly is internally provided with an accommodating space, and the tire pressure detection assembly is assembled in the accommodating space; the tire pressure detection assembly comprises an electric control board, a detection element and a board antenna, wherein the detection element and the board antenna are electrically connected with the electric control board, and the board antenna is vertically connected with the electric control board.

[0006] In an embodiment, the board antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, and the radiation element comprises a plurality of radiation patches, wherein the plurality of radiation patches are electrically connected with each other and arranged at the periphery of the substrate.

[0007] In an embodiment, the bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening.

[0008] In an embodiment, the radiation patch extends to the first connecting part.

[0009] In a specific embodiment, the shell assembly comprises: 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 on-board antenna extends into the protection groove.

[0010] In a specific embodiment, the tire pressure sensor further comprises: a valve and a fastener, the upper shell is provided with an adjusting groove, and one end of the fastener is connected with the valve through the adjusting groove.

[0011] In a specific embodiment, the fastener is provided with a fitting part corresponding to the position of the adjusting groove, the fitting part is embedded in the adjusting groove, and the width of the fitting part is matched with the width of the adjusting groove.

[0012] In a specific embodiment, the upper shell is provided with a connecting cavity on the side close to the valve, the adjusting groove is communicated with the connecting cavity, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity.

[0013] In a specific embodiment, the inner wall of the connecting cavity has the same curvature as the outer wall of the connecting head.

[0014] In a second aspect, the embodiments of the utility model provide a tire, which comprises: a hub and at least one tire pressure sensor as described above, the tire pressure sensor is assembled on the hub, and part of the structure of the tire pressure sensor is located in the hub.

[0015] The utility model has the advantages of:

[0016] Compared with the prior art, the tire pressure sensor provided by the utility model has the on-board antenna vertically connected to the electric control board, so that no extra bypass space needs to be reserved around the electric control board, the utilization rate of the accommodation space is improved, and the volume of the on-board antenna is smaller than that of the same transmitting power antenna, so that the volume of the tire pressure detection assembly is reduced, and the miniaturization of the tire pressure sensor is realized.

[0017] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A tire pressure sensor overall structure schematic view is provided for the embodiments of the utility model;

[0019] Figure 2 A tire pressure sensor shell assembly internal structure schematic view is provided for the embodiments of the utility model;

[0020] Figure 3 A separation structure schematic view of a middle shell assembly of a tire pressure sensor, a valve and a fastener is provided for the utility model embodiment;

[0021] Figure 4 A tire pressure detection assembly structure schematic view is provided for the utility model embodiment of a tire pressure sensor;

[0022] Figure 5 A board antenna structure schematic view is provided for the utility model embodiment of a tire pressure sensor;

[0023] Figure 6 A board antenna and an electric control board connection relationship structure schematic view is provided for the utility model embodiment of a tire pressure sensor;

[0024] Figure 7 A tire overall structure schematic view is provided for the utility model embodiment.

[0025] Mark explanation:

[0026] 10, tire pressure sensor; 11, shell assembly; 111, upper shell; 1111, adjusting groove; 1112, connecting cavity; 1113, protection groove; 1114, through hole; 112, bottom cover; 113, containing space; 12, tire pressure detection assembly; 121, electric control board; 1211, first opening; 1212, second opening; 122, detection element; 123, board antenna; 1231, base plate; 12311, first connecting part; 12312, second connecting part; 1232, radiation element; 12321, radiation patch; 1233, first end; 1234, transition section; 1235, second end; 124, power supply; 13, valve; 131, connecting head; 14, fastener; 141, fitting part; 1411, limiting surface; 20, hub. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0028] The technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings of the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] In the description of the utility model, it is understood that the directions or positional relations indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the directions or positional relations described based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0030] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0031] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upper of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined lower of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means 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 application. In the present specification, the illustrative description 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0034] Embodiment

[0035] First aspect, please refer to Figures 1 to 6 The embodiment of the present application proposes a tire pressure sensor 10, comprising: a shell assembly 11 and a tire pressure detection assembly 12, the shell assembly 11 is provided with a containing space 113, the tire pressure detection assembly 12 is assembled in the containing space 113, the tire pressure detection assembly 12 comprises: an electronic control board 121, a detection element 122 and a board antenna 123, the detection element 122 and the board antenna 123 are electrically connected with the electronic control board 121, and the board antenna 123 is vertically connected to the electronic control board 121.

[0036] It should be particularly pointed out that the upper shell 111 in the shell assembly 11 is provided with a through hole 1114 corresponding to the detection element 122, when the tire pressure sensor 10 is applied in the tire, the gas inside the tire contacts the detection element 122 through the through hole 1114, and the pressure and temperature inside the tire are measured at the same time.

[0037] Specifically, the board antenna 123 is vertically connected to the electronic control board 121, avoiding the mutual interference between the board antenna 123 and the electronic elements on the electronic control board 121, improving the stability of signal transmission. At the same time, the board antenna 123 does not need to surround the electronic control board 121, so that the surrounding of the electronic control board 121 does not need to reserve additional bypass space, improving the utilization rate of the containing space 113, and the volume of the board antenna 123 is smaller than that of the same transmitting power antenna, thereby reducing the volume of the tire pressure detection assembly 12, realizing the miniaturization of the tire pressure sensor 10.

[0038] The tire pressure sensor 10 proposed in the embodiment is that the board antenna 123 is vertically connected to the electronic control board 121, so that the surrounding of the electronic control board 121 does not need to reserve additional bypass space, improving the utilization rate of the containing space 113, and the volume of the board antenna 123 is smaller than that of the same transmitting power antenna, thereby reducing the volume of the tire pressure detection assembly 12, realizing the miniaturization of the tire pressure sensor 10.

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

[0040] Specifically, the on-board antenna 123 is based on the wavelength shortening principle, reduces the transmission speed of electromagnetic waves, concentrates the electric field at the interface between the radiating element 1232 and the substrate 1231, reduces the edge radiation loss, improves the radiation efficiency, increases the energy distribution in space, improves the radiation efficiency of the on-board antenna 123, and has a smaller physical volume than the same transmitting power antenna, realizing the miniaturization of the antenna. Moreover, after the plurality of radiating patches 12321 are electrically connected to each other, a whole radiation system can be formed within the working frequency band. When current flows through the radiating patches 12321, each radiating patch 12321 will generate electromagnetic radiation, so that the radiating patches 12321 produce a synergistic radiation effect within the working frequency band, so that the electromagnetic waves superimpose and interfere with each other in space, and are radiated outward with a specific direction and intensity, so that the signal is transmitted. The antenna's radiation performance remains stable. The patches are arranged along the edge of the substrate 1231, which improves the transmitting area of the on-board antenna 123, excites a ring-shaped surface current, and the radiation field is superimposed in the direction perpendicular to the plane of the substrate 1231, reducing signal loss and improving signal transmission quality.

[0041] Preferably, in the present embodiment, the material of the substrate 1231 is PCB material, which has a stable dielectric constant and a low loss factor, so that the electromagnetic waves can propagate stably in the dielectric layer, reducing signal attenuation and distortion during transmission, and 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 radiating element 1232, thereby 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 production cost.

[0042] Please refer to Figure 5 and Figure 6 The bottom of the substrate 1231 is provided with a first connecting part 12311, and the electric control board 121 is provided with a first opening 1211 corresponding to the position of the first connecting part 12311, and the first connecting part 12311 is inserted into the first opening 1211.

[0043] Specifically, the first connecting part 12311 at the bottom of the substrate 1231 cooperates with the first opening 1211 on the electric control board 121 to realize the stable connection of the on-board antenna 123 and the control unit, avoid the connection loosening or falling off phenomenon caused by vibration and other factors, and improve the working stability of the antenna.

[0044] Preferably, the bottom of the substrate 1231 is also provided with a second connecting portion 12312, and the electric control board 121 is provided with a second opening 1212 corresponding to the position of the second connecting portion 12312, the second connecting portion 12312 is inserted into the second opening 1212, and the insertion of the second connecting portion 12312 into the second opening 1212 cooperates with the insertion of the first connecting portion 12311 into the first opening 1211, thereby realizing the double-point fixed connection of the on-board antenna 123 and the electric control board 121, and further improving the connection stability of the on-board antenna 123 and the electric control board 121.

[0045] Please refer to Figure 2 In an embodiment, the bottom of the substrate 1231 is also provided with a second connecting portion 12312, and the second connecting portion 12312 on the two sides of the substrate 1231 is symmetrical about the first connecting portion 12311, the second connecting portion 12312 on one side of the bottom of the substrate 1231 is provided with a feed (not shown in the figure), and the second connecting portion 12312 on the other side of the bottom of the substrate 1231 is provided with a ground electrode (not shown in the figure), by symmetrically arranging the feed and the ground electrode on the two sides of the substrate 1231, the interference and noise in the signal transmission process are reduced, the stability and reliability of the signal are improved, the substrate 1231 can reasonably layout each component in the case of limited accommodation space 113, the space utilization is improved, and the on-board antenna 123 is more compact.

[0046] Please refer to Figure 6 The radiation patch 12321 extends to the first connecting portion 12311, which increases the radiation frequency of the on-board antenna 123 in the case of limited accommodation space 113, so that the on-board antenna 123 of the present embodiment can send stronger signals 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 comprises: opposite first and second ends 1233 and 1235, and a 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, and 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 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 a difference 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 more concentratedly radiated in a specific direction, enhancing the signal strength in the target area, and improving the directivity and coverage range of the on-board antenna 123 radiation. Moreover, when the current flows in the antenna, the transition section 1234 acts as an intermediate connecting part, which 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] Referring to Figure 2 The shell assembly 11 comprises an upper shell 111 and a bottom cover 112, the upper shell 111 covers the bottom cover 112 to form a containing 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 electric control board 121 and is placed in the protection groove 1113 of the upper shell 111, which improves the utilization rate of the containing space 113 and makes the entire tire pressure sensor 10 structure more compact. The on-board antenna 123 extends into the protection groove 1113 of the upper shell 111, reducing electromagnetic interference between the on-board antenna 123 and other electronic components on the electric control board 121 and improving the stability of signal transmission.

[0051] Referring to Figure 4 In this embodiment, the tire pressure detection assembly 12 further comprises a power supply 124, which is electrically connected to the electric control board 121, the detection element 122 and the on-board antenna 123 and supplies power to the electric control board 121, the detection element 122 and the on-board antenna 123. In the containing space 113, the battery and the electric control board 121 are symmetrically arranged along the length direction of the bottom cover 112, realizing reasonable layout of each component in the limited containing space and improving the space utilization rate. At the same time, the symmetric arrangement of the battery and the electric control board 121 can balance the weight distribution inside the tire pressure sensor 10, so that it maintains good dynamic balance when the tire rotates at high speed, reduces vibration or shaking caused by eccentricity of the internal structure, and improves the working stability of the sensor.

[0052] Referring to Figure 1 and Figure 2The tire pressure sensor 10 further comprises a valve 13 and a fastener 14, the upper shell 111 is provided with an adjusting groove 1111, and one end of the fastener 14 is connected with the valve 13 through the adjusting groove 1111.

[0053] Specifically, the valve 13 is connected with the shell assembly 11 through the fastener 14, which facilitates the installation and dismounting of the tire pressure sensor 10 on the tire. The upper shell 111 is provided with the adjusting groove 1111, which increases the swing range of the fastener 14 in the transverse direction, thereby improving the adaptability of the tire pressure sensor 10 to various wheel frames. When the angle of the wheel frame is small, the valve 13 moves downward under the action of external force, and when the angle of the wheel frame is large, the process is opposite to the above.

[0054] Please refer to Figure 2 and Figure 3 The fastener 14 is provided with an embedded part 141 at a position corresponding to the adjusting groove 1111, the embedded part 141 is embedded in the adjusting groove 1111, and the width of the embedded part 141 is adapted to the width of the adjusting groove 1111.

[0055] Specifically, the embedded part 141 is provided with at least one limiting surface 1411 on the circumferential side, the limiting surface 1411 is limited and stopped in cooperation with the corresponding side wall of the adjusting groove 1111 to prevent the fastener 14 from rotating. In the embodiment, the embedded part 141 is provided with four limiting surfaces 1411 on the circumferential side, and the width of the embedded part 141 is adapted to the width of the adjusting groove 1111. When the fastener 14 is connected with the valve 13 through the adjusting groove 1111, at this time, the embedded part 141 on the fastener 14 is embedded in the adjusting groove 1111, and the limiting surface 1411 abuts against the two side walls of the adjusting groove 1111, thereby preventing the fastener 14 from rotating relative to the adjusting groove 1111.

[0056] Please refer to Figure 3 The side of the upper shell 111 close to the valve 13 is provided with a connecting cavity 1112, the adjusting groove 1111 is communicated with the connecting cavity 1112, the valve 13 is provided with a connecting head 131 at a position corresponding to the connecting cavity 1112, and one end of the fastener 14 passes through the adjusting groove 1111 and the connecting cavity 1112 so as to connect the connecting head 131 to the connecting cavity 1112.

[0057] Specifically, the fastener 14 is connected with the connecting head 131 on the valve 13 in sequence through the adjusting groove 1111 and the connecting cavity 1112 of the upper shell 111, forming a relatively locked mechanical structure, so that the tire pressure sensor 10 can be stably installed on the tire, avoiding the phenomenon of loosening or falling off of the tire pressure sensor 10 caused by vibration, centrifugal force or tire deformation during driving of the vehicle. At the same time, the connecting cavity 1112 provides a precise docking space for the connection between the fastener 14 and the connecting head 131, ensuring that the fastener 14 can be accurately connected with the connecting head 131, realizing the firm connection of the shell assembly 11 and the valve 13.

[0058] In the present example, the inner wall of the connecting cavity 1112 and the outer wall of the connecting head 131 have the same curvature, so that the stress distribution of the connecting head 131 and the connecting cavity 1112 on the contact surface is uniform. When subjected to stress caused by centrifugal force generated by tire rotation or vibration during driving of the vehicle, the stress can be uniformly transmitted to the entire contact surface, rather than concentrated in a local area, avoiding stress concentration phenomenon and improving the connection stability of the valve 13 and the shell assembly 11.

[0059] In the second aspect, referring to Figure 7 The embodiment of the utility model provides a tire, comprising: a hub 20 and at least one tire pressure sensor 10 as described above, the tire pressure sensor 10 is assembled in the hub 20, and part of the structure of the tire pressure sensor 10 is located in the hub 20.

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

[0061] Compared with the prior art, the tire pressure sensor 10 provided by the utility model has the on-board antenna 123 vertically connected to the electric control board 121, so that no additional bypass space needs to be reserved around the electric control board 121, the utilization rate of the containing space 113 is improved, and the on-board antenna 123 is smaller in volume than the same transmitting power antenna, so that the volume of the tire pressure detection assembly 12 is reduced, and the miniaturization of the tire pressure sensor 10 is realized.

[0062] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A tire pressure sensor characterized by, The application relates to a tire pressure sensor. The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate.

2. The tire pressure sensor of claim 1, wherein, The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening.

3. The tire pressure sensor of claim 2, wherein, The radiation patch extends to the first connecting part.

4. The tire pressure sensor of claim 3, wherein, The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove.

5. The tire pressure sensor of claim 1, wherein, The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve.

6. The tire pressure sensor of claim 5, wherein, The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove.

7. The tire pressure sensor of claim 6, wherein, The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity.

8. The tire pressure sensor of claim 6, wherein, The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature.

9. The tire pressure sensor of claim 8, wherein, The application relates to a tire pressure sensor.

10. A tire characterized by The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate. The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening. The radiation patch extends to the first connecting part. The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove. The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve. The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove. The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity. The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature. The application relates to a tire pressure sensor. The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate. The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening. The radiation patch extends to the first connecting part. The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove. The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve. The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove. The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity. The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature. The application relates to a tire pressure sensor. The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate. The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening. The radiation patch extends to the first connecting part. The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove. The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve. The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove. The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity. The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature. The application relates to a tire pressure sensor. The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate. The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening. The radiation patch extends to the first connecting part. The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove. The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve. The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove. The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity. The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature. The application relates to a tire pressure sensor. The onboard antenna comprises a substrate and a radiation element, the radiation element is attached to the substrate, the radiation element comprises a plurality of radiation patches, the plurality of radiation patches are electrically connected to each other and arranged at the periphery of the substrate. The bottom of the substrate is provided with a first connecting part, the electric control board is provided with a first opening corresponding to the position of the first connecting part, and the first connecting part is inserted into the first opening. The radiation patch extends to the first connecting part. The shell assembly comprises an upper shell and a bottom cover, the upper shell covers the bottom cover to form the accommodating space, the upper shell is provided with a protection groove, and the onboard antenna extends into the protection groove. The tire pressure sensor further comprises a valve and a fastener, the upper shell is provided with an adjusting groove, one end of the fastener passes through the adjusting groove and is connected with the valve. The fastener is provided with an embedded part corresponding to the position of the adjusting groove, the embedded part is embedded in the adjusting groove, and the width of the embedded part is matched with the width of the adjusting groove. The side of the upper shell close to the valve is provided with a connecting cavity, the adjusting groove and the connecting cavity are communicated, the valve is provided with a connecting head corresponding to the position of the connecting cavity, and one end of the fastener passes through the adjusting groove and the connecting cavity so that the connecting head is connected to the connecting cavity. The inner wall of the connecting cavity and the outer wall of the connecting head have the same curvature. The application relates to a tire pressure sensor. The onboard antenna comprises a

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