Tire pressure sensor

Abstract

The utility model relates to the field of tire pressure sensors, in particular to a tire pressure sensor which comprises a shell body, an air nozzle and a sensor assembly, a containing cavity for installing the sensor assembly is formed in the shell body, the sensor assembly comprises a circuit board, an antenna and a power supply battery, the circuit board is fixed in the middle of the containing cavity, and the antenna is fixed in the containing cavity. The power supply battery is electrically connected to the back face of the circuit board, the antenna is electrically connected to the back face of the circuit board and penetrates through the circuit board to extend upwards, the upper portion and the lower portion of the containing cavity are mutually independent, the power supply battery utilizes the space below the containing cavity, and the antenna penetrates through the circuit board to extend upwards to utilize the space above the containing cavity. The overall utilization rate of the containing cavity is improved, the size of the shell body is reduced, the overall structural size of the tire pressure sensor is reduced, the probability of collision between the tire pressure sensor and the interior of a tire is reduced, and damage to the tire pressure sensor is avoided.

Description

Technical Field

[0001] The utility model relates to the field of tire pressure sensors, in particular to a tire pressure sensor. Background Art

[0002] Tire pressure sensors are critical automotive safety devices that monitor tire pressure in real time. These sensors operate in two main ways: direct and indirect. Direct tire pressure monitoring systems measure tire pressure directly using a pressure sensor installed inside each tire. A wireless transmitter transmits this information from the tire to a central receiver module. If tire pressure falls below a preset safety level or a leak occurs, the system immediately issues an alarm, alerting the driver to take appropriate action. Indirect tire pressure monitoring, on the other hand, infers tire pressure by monitoring wheel rotational speed. When the pressure in a tire decreases, the weight of the vehicle reduces its rolling radius, causing it to rotate faster than the other tires. By comparing the speed differences between tires, the system can indirectly determine whether tire pressure is abnormal.

[0003] For example, the utility model patent application number CN202221161330.5, titled "A Tire Pressure Sensor," includes a housing with a receiving slot housing a battery, a circuit board electrically connected to the battery, and one or more electronic components mounted on the circuit board. A silicone pad is positioned between the circuit board and the housing, with one side of the pad affixed to the circuit board and the other side affixed to the inside of the housing. However, existing tire pressure sensors are relatively large overall structures, making them susceptible to collision with the interior of the tire, potentially damaging the sensor. Utility Model Content

[0004] The purpose of the utility model is to provide a tire pressure sensor, aiming to improve the problem that the existing tire pressure sensor has a large overall structure and is prone to collision with the inside of the tire, causing damage to the tire pressure sensor.

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

[0006] A tire pressure sensor includes a housing, an air nozzle, and a sensor assembly.

[0007] The shell body has an accommodating cavity for installing the sensor assembly, and the air nozzle is plugged and fixed on the inner connecting part of the shell body;

[0008] The sensor assembly includes a circuit board, an antenna and a power supply battery. The circuit board is fixed in the middle of the accommodating cavity, the power supply battery is electrically connected to the back of the circuit board, and the antenna is electrically connected to the back of the circuit board and extends upward through the circuit board.

[0009] Further, on both sides of the connecting portion of the shell body, there are first convex portions and second convex portions protruding outward. The interiors of the first convex portion and the second convex portion are hollow structures and are connected to the accommodation cavity.

[0010] Both ends of the antenna pass through the circuit board and extend upward into the interiors of the first convex portion and the second convex portion respectively, forming a first bending segment and a second bending segment. A connecting segment is connected between the first bending segment and the second bending segment.

[0011] Further, the connecting segment is in close contact with the front surface of the circuit board.

[0012] Further, the connecting segment is a "冂"-shaped connecting segment. The free ends of the connecting segment are respectively connected to the tails of the first bending segment and the second bending segment.

[0013] On the front surface of the circuit board, there are sensor devices. The connecting segment surrounds the periphery of the sensor devices.

[0014] Further, the length of the first bending segment is greater than that of the second bending segment, and the tail of the second bending segment extends above one side of the power supply battery.

[0015] [[ID=​​​​​​​​​​​​​​​​After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0022] The circuit board is fixed in the middle of the accommodating cavity, so that the upper and lower parts of the accommodating cavity are independent of each other. The power supply battery is electrically connected to the back of the circuit board, utilizing the lower space of the accommodating cavity. The antenna extends upward through the circuit board, utilizing the upper space of the accommodating cavity, improving the overall utilization rate of the accommodating cavity, reducing the volume of the shell body, thereby reducing the overall structural size of the tire pressure sensor, reducing the probability of it colliding with the inside of the tire, and avoiding damage to the tire pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the tire pressure sensor of the present invention;

[0024] Figure 2 This is a partial exploded schematic diagram of the structure of the tire pressure sensor of the present invention;

[0025] Figure 3 This is a schematic diagram of the bottom structure of the upper housing of the tire pressure sensor of the present invention;

[0026] Figure 4 This is a front structural diagram of the sensor assembly of the tire pressure sensor of the present invention;

[0027] Figure 5 This is a schematic diagram of the reverse structure of the sensor assembly of the tire pressure sensor described in the present invention.

[0028] Description of reference numerals:

[0029] 1. Shell body; 11. Upper shell; 111. Connecting portion; 112. First protrusion; 113. Second protrusion; 114. Upper connecting column; 1141. Insertion rod; 115. Positioning column; 116. Reinforcement rib; 117. Through hole; 12. Lower shell; 121. Lower connecting column; 1211. Insertion hole; 122. Support column;

[0030] 2. Gas nozzle;

[0031] 3. Sensor assembly; 31. Circuit board; 311. Connection hole; 312. Positioning hole; 313. Sensor device; 314. First connecting arm; 315. Second connecting arm; 316. Connecting piece; 317. Weight-reducing notch; 32. Antenna; 321. First bending section; 322. Second bending section; 323. Connection section; 33. Power supply battery. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] When an element is referred to as being “fixed to,” “disposed on,” or “provided on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the utility model based on specific circumstances.

[0036] Example

[0037] Please refer to Figure 1-5 As shown, this embodiment provides a tire pressure sensor comprising a housing 1, an air nozzle 2, and a sensor assembly 3. The housing 1 defines a cavity for mounting the sensor assembly 3. The air nozzle 2 is plugged into and secured to the inner connection portion 111 of the housing 1. The sensor assembly 3 comprises a circuit board 31, an antenna 32, and a power supply battery 33. The circuit board 31 is secured in the center of the cavity. The power supply battery 33 is electrically connected to the back of the circuit board 31. The antenna 32 is also electrically connected to the back of the circuit board 31 and extends upward through the circuit board 31.

[0038] The circuit board 31 is fixed in the middle of the accommodating cavity, so that the upper and lower parts of the accommodating cavity are independent of each other. The power supply battery 33 is electrically connected to the back of the circuit board 31 to utilize the lower space of the accommodating cavity. The antenna 32 extends upward through the circuit board 31 to utilize the upper space of the accommodating cavity, thereby increasing the overall utilization rate of the accommodating cavity and reducing the volume of the shell body 1, thereby reducing the overall structural size of the tire pressure sensor, reducing the probability of it colliding with the inside of the tire, and avoiding damage to the tire pressure sensor.

[0039] Please refer to Figure 1-3 As shown, in this embodiment, the housing body 1 includes an upper shell 11 and a lower shell 12, with the upper shell 11 covering the lower shell 12. A downwardly extending upper connecting post 114 is provided on the inner side of the upper shell 11, and a downwardly extending insertion rod 1141 is provided at the bottom of the upper connecting post 114; a lower connecting post 121 corresponding to the upper connecting post 114 is provided on the inner side of the lower shell 12, and a socket 1211 is formed on the lower connecting post 121; a connecting hole 311 corresponding to the insertion rod 1141 is provided on the circuit board 31; the insertion rod 1141 passes through the connecting hole 311 and is inserted into the socket 1211, and the end faces of the upper connecting post 114 and the lower connecting post 121 respectively abut against the front and back sides of the circuit board 31. The insertion rod 1141 passes through the connecting hole 311 to limit the circuit board 31, and the upper connecting column 114 and the lower connecting column 121 push and limit the circuit board 31 from the upper and lower sides to ensure that the circuit board 31 is in a suspended state and separates the upper and lower sides of the accommodating cavity; at the same time, it ensures the stability of the circuit board 31 in the accommodating cavity.

[0040] In this embodiment, there are two upper connecting posts 114, one on each side of a diagonal line on the inner side of the upper housing 11. Similarly, there are two lower connecting posts 121. Furthermore, two downwardly extending positioning posts 115 are provided on the inner side of the upper housing 11, located on either side of another diagonal line on the inner side of the upper housing 11. Positioning holes 312 corresponding to the positioning posts 115 are defined on the circuit board 31. The positioning posts 115 are inserted into the positioning holes 312. The upper connecting posts 114 and the positioning posts 115 limit and position the circuit board 31 at the four corners, further improving the stability of the circuit board 31 and the accuracy of the installation position.

[0041] Please refer to Figure 2 As shown, in this example, a support column 122 is fixed to the inner side of the lower housing 12, and the support column 122 contacts the bottom of the power supply battery 33. The support column 122 supports the power supply battery 33, improving the stability of the power supply battery 33 and preventing poor contact between the circuit board 31 and the power supply battery 33, which could affect the accuracy of tire pressure monitoring.

[0042] Please refer to Figure 1-3As shown, in this embodiment, the connecting portion 111 of the housing body 1 is flanked by outwardly projecting first and second protrusions 112, 113. These first and second protrusions 112, 113 enhance the structural strength of the connecting portion 111 of the housing body 1 and ensure the stability of the connection between the housing body 1 and the air nozzle 2. In this embodiment, the connecting portion 111, the first and second protrusions 112, 113 are all disposed on the upper shell 11. Multiple spaced reinforcing ribs 116 are provided on the outer edge of the upper shell 11. Further reinforcing ribs 116 are disposed outside the first and second protrusions 112, 113, and the bottom of the upper shell 11, effectively enhancing the overall structural strength of the upper shell 11. In this embodiment, a laser welding layer (not shown in the drawings) is provided between the edges of the upper and lower shells 11, connecting the upper and lower shells 11, 12, using laser welding. Compared to traditional glue-filling methods, this effectively reduces the overall weight of the tire pressure sensor, improves production efficiency, and provides a better overall sealing effect for the housing body 1.

[0043] Please refer to Figure 3 and Figure 4 As shown, in this embodiment, the interiors of the first and second raised portions 112, 113 are hollow structures and communicate with the accommodating cavity. The hollow configuration of the first and second raised portions 112, 113 effectively reduces the weight of the upper housing 11, further reducing the overall weight of the tire pressure sensor and reducing its overall inertia, thereby preventing the tire pressure sensor from tilting and colliding inside the tire, which could damage it. The two ends of the antenna 32 extend upward through the circuit board 31 into the interiors of the first and second raised portions 112, 113, respectively, forming a first bent section 321 and a second bent section 322. A connecting section 323 connects the first and second bent sections 321, 322. The antenna 32 utilizes the internal space of the first protrusion 112 and the second protrusion 113 to effectively extend the length of the antenna 32, and the first bending section 321 and the second bending section 322 effectively increase the space of the antenna 32, thereby improving the signal transmission distance of the antenna 32 and the stability and anti-interference ability of the signal transmission, so that the external receiver can receive the inner tube internal pressure information detected by the circuit board 31 in a timely and stable manner.

[0044] Please refer to Figure 4As shown, in this embodiment, the connecting section 323 is in mutual contact with the front side of the circuit board 31. The connecting section 323 and the end portions of the antenna 32 are respectively in contact with or connected to the front side and the back side of the circuit board 31, forming a clamping structure, which abuts and supports the circuit board 31 from both sides, effectively improving the stability of the antenna 32 located in the accommodation cavity. Further, the connecting section 323 is a "冂"-shaped connecting section 323, and the free ends of the connecting section 323 are respectively connected to the tail ends of the first bending section 321 and the second bending section 322. A sensor device 313 is provided on the front side of the circuit board 31, and the connecting section 323 surrounds the periphery of the sensor device 313. That is, the connecting section 323 has three mutually connected segments, the adjacent segments are perpendicular to each other, and the spaced segments are parallel to each other, forming a "冂"-shaped connecting section 323, further increasing the overall length of the antenna 32. And the sensor device 313 is arranged within the enclosed area of the connecting section 323, and is arranged at an interval from the connecting section 323, effectively reducing the interference of the sensor device 313 on the antenna 32. In this embodiment, the sensor device 313 is the internal circuit device of an existing tire pressure sensor. In this embodiment, the front side of the circuit board 31 faces the upper housing 11, and the back side of the circuit board 31 faces the lower housing 12.

[0045] Further, the length of the first bending section 321 is greater than that of the second bending section 322, and the tail end of the second bending section 322 extends above one side of the power supply battery 33. By setting the shorter second bending section 322, the distance between the second bending section 322 and the power supply battery 33 is increased, reducing the interference of the power supply battery 33 on the antenna 32.

[0046] Please refer to Figure 4 and Figure 5 As shown, in this embodiment, a first connecting arm 314 and a second connecting arm 315 are electrically connected to the back side of the circuit board 31. The free end of the first connecting arm 314 is located above the power supply battery 33 and is abutted and arranged on the top surface of the power supply battery 33. The free end of the second connecting arm 315 extends to the bottom of the power supply battery 33 and is connected with a connecting piece 316, and the connecting piece 316 is abutted and arranged on the bottom of the power supply battery 33. By arranging the connecting piece 316 at the bottom of the power supply battery 33, the contact area between it and the power supply battery 33 is increased, effectively improving the stability of the power supply battery 33. In this embodiment, the positive electrode of the power supply battery 33 faces upward and the negative electrode faces downward, that is, the free end of the first connecting arm 314 is abutted and arranged on the positive electrode of the power supply battery 33, and the connecting piece 316 is abutted and arranged on the negative electrode of the power supply battery 33. Similarly, the positive electrode of the power supply battery 33 can face downward and the negative electrode face upward, then the free end of the first connecting arm 314 is abutted and arranged on the negative electrode of the power supply battery 33, and the connecting piece 316 is abutted and arranged on the positive electrode of the power supply battery 33.

[0047] Furthermore, the housing 1 is provided with a through hole 117, located above the front surface of the circuit board 31. In this embodiment, the through hole 117 is provided in the upper housing 11. This provides communication between the interior and exterior of the housing 1, facilitating the sensor device 313 on the circuit board 31 to detect parameters such as internal tire pressure. A weight-reducing notch 317 is provided in the circuit board 31, effectively reducing the weight of the circuit board 31 and further reducing the overall weight of the tire pressure sensor.

[0048] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes 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 in 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: It includes a shell body, an air nozzle and a sensor assembly. An accommodation cavity for installing the sensor assembly is formed inside the shell body, and the air nozzle is inserted and fixed on the connecting part of the shell body. The sensor assembly includes a circuit board, an antenna and a power supply battery. The circuit board is fixed in the middle of the accommodation cavity. The power supply battery is electrically connected to the back of the circuit board. The antenna is electrically connected to the back of the circuit board and extends upward through the circuit board.

2. The tire pressure sensor according to claim 1, wherein: On both sides of the connecting part of the shell body, there are outwardly protruding first protruding parts and second protruding parts. The interiors of the first protruding part and the second protruding part are hollow structures and are connected to the accommodation cavity. Both ends of the antenna pass through the circuit board and extend upward into the interiors of the first protruding part and the second protruding part respectively, forming a first bending section and a second bending section. A connecting section is connected between the first bending section and the second bending section.

3. The tire pressure sensor according to claim 2, wherein: The connecting section is in mutual contact with the front surface of the circuit board.

4. The tire pressure sensor according to claim 2, wherein: The connecting section is a "冂”-shaped connecting section. The free ends of the connecting section are respectively connected to the tail ends of the first bending section and the second bending section. Sensor devices are arranged on the front surface of the circuit board, and the connecting section surrounds the periphery of the sensor devices.

5. The tire pressure sensor according to claim 2, wherein: The length of the first bending section is greater than that of the second bending section, and the tail end of the second bending section extends above one side of the power supply battery.

6. The tire pressure sensor according to claim 1, characterized in that: On the back of the circuit board, there are electrically connected a first connecting arm and a second connecting arm. The free end of the first connecting arm is located above the power supply battery and is in contact with the positive electrode of the power supply battery in a fitting manner. The free end of the second connecting arm extends to the bottom of the power supply battery and is connected with a connecting piece, and the connecting piece is in contact with the negative electrode of the power supply battery in a fitting manner.

7. The tire pressure sensor according to claim 1, characterized in that: A through hole is formed in the shell body, and the through hole is located above the front surface of the circuit board.

8. The tire pressure sensor according to claim 1, wherein: The shell body includes an upper shell and a lower shell, and the upper shell covers the lower shell. On the inner side of the upper shell, there are downwardly extending upper connecting columns. At the bottom of the upper connecting columns, there are downwardly extending insertion rods. On the inner side of the lower shell, there are lower connecting columns corresponding to the upper connecting columns one by one. Jacks are formed in the lower connecting columns. Connecting holes corresponding to the insertion rods one by one are formed on the circuit board. The insertion rods pass through the connecting holes and are inserted into the jacks. The end faces of the upper connecting columns and the lower connecting columns are in top contact with the front surface and the back surface of the circuit board respectively.

9. The tire pressure sensor according to claim 8, characterized in that: Support columns are fixed on the inner side of the lower shell, and the support columns are in top contact with the bottom of the power supply battery.

10. The tire pressure sensor according to claim 8, characterized in that: On the outer edge of the upper shell, there are a plurality of spaced strengthening rib strips.

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