Tire pressure monitoring device with external power supply

Abstract

The utility model relates to an externally-powered tire pressure monitoring device which is characterized in that an externally-powered assembly is arranged at the upper part of an inflating valve mechanism, the lower end of the inflating valve mechanism is connected with an internally-arranged tire pressure sensor assembly, and a conducting component for realizing electrical connection between the externally-powered assembly and the internally-arranged tire pressure sensor assembly is also arranged in the inflating valve mechanism; the external power supply assembly is arranged on the inflating valve locking nut or the inflating valve cap; the negative electrode of the external power supply assembly is connected with the inflating valve body through the inflating valve cap or the inflating valve locking nut in a threaded mode, and the negative electrode of the built-in tire pressure sensor assembly is connected with the inflating valve body. The positive electrode of the external power supply assembly is connected with the built-in tire pressure sensor assembly through the conducting component by the inflating valve cap or the inflating valve locking nut, compared with the prior art, the arranged structure meets national standard requirements of inflating valve products, replacement of existing products can be completed, and the service cycle and the service life of the built-in tire pressure sensor are remarkably prolonged.

Description

Technical field:

[0001] The utility model relates to the technical field of automobile tire pressure detection equipment manufacturing, in particular to an externally powered tire pressure monitoring device which has a reasonable structure, is easy to assemble and disassemble, and can effectively extend the tire pressure data monitoring cycle. Background technology:

[0002] When drivers are driving on the road, driving safety is the primary consideration, and tire pressure has a great impact on the vehicle condition and has a critical influence on driving safety. The tire must have normal tire pressure to make the vehicle run smoothly. Too high or too low tire pressure may cause a tire blowout or puncture, seriously affecting the stability of the vehicle and threatening the safety of life and property of passers-by. Therefore, the importance of tire pressure monitoring for driving safety is self-evident. However, the traditional method of measuring tire pressure requires the vehicle to be stopped before it can be carried out. It is impossible to know the real-time changes in the tire pressure of the vehicle while driving. If the tire is abnormal while driving, the driver cannot immediately know and respond.

[0003] At present, tire pressure sensors on the market are generally divided into built-in tire pressure sensors and external tire pressure sensors. External tire pressure sensors are installed outside the tire valve and are easily damaged. In order to detect the air pressure, the valve core cannot be sealed normally and loses its function, which poses a safety hazard of accidental air leakage. Built-in tire pressure sensors have their own valves and are installed inside the tire. It is not easy to replace the battery and has a short service life. Because the built-in battery is usually heavy, it affects the static and dynamic balance of the wheel.

[0004] Patent document CN111267559A records a built-in tire pressure sensor, which uses a solar cell assembly installed on a solar valve cap to supply power and store electricity for various functional modules of the tire pressure sensing device, wherein the solar power generation module is installed on the outer wall surface of the solar valve cap; the built-in sensing device disclosed in the document also includes a monitoring box and a valve stem assembly, wherein the solar valve cap assembly is a valve cap with improved shape and enlarged volume, and a wedge-shaped groove is provided at the lower part of the valve stem, and a cap compartment is formed in the hollow space between the outer wall and the inner wall of the solar valve cap for accommodating the functional modules of the tire pressure sensing device, and a display screen, functional buttons and a solar power generation module are embedded in the outer wall, and one end of a wire embedded in the valve stem wall is connected to the functional module in the cap compartment through a conductive contact, and the other end of the wire is connected to the functional module in the monitoring box, thereby realizing the connection between the functional module in the solar valve cap and the functional module in the monitoring box. The implementation of this plan requires significant structural changes to multiple components in the valve device. The finished product will not be able to adapt to the valves and related auxiliary accessories specified in the national standard. It has poor practicality and a complex structure. The exposed wires are easily short-circuited with the valve device body made of metal materials, resulting in poor product stability. Summary of the invention:

[0005] In view of the shortcomings and deficiencies in the prior art, the utility model proposes a tire pressure monitoring device which can significantly prolong the monitoring working time of the built-in tire pressure monitoring sensor while complying with the national standard requirements for valve stem products, and has a reasonable structure, easy disassembly and assembly, and a reliable and stable external power supply.

[0006] The utility model achieves this through the following measures:

[0007] A tire pressure monitoring device with an external power supply is provided with a tire pressure monitoring sensor and a valve mechanism, wherein the valve mechanism comprises a valve core, a valve body, a valve locking nut and a valve cap, the valve core is placed in the valve body, the valve locking nut and the valve cap are respectively connected to the upper part of the valve body through threads, and the valve cap is fixed above the valve locking nut, characterized in that an external power supply component is provided on the upper part of the valve mechanism, and a built-in tire pressure sensor component is connected to the lower end, and the valve mechanism is also provided with A conductive component for realizing electrical connection between the external power supply component and the built-in tire pressure sensor component; the external power supply component is arranged on the valve stem locking nut, or on the valve stem cap; the valve stem cap or the valve stem locking nut connects the negative pole of the external power supply component to the valve stem body through threads, and the negative pole of the built-in tire pressure sensor component is connected to the valve stem body, and the valve stem cap or the valve stem locking nut connects the positive pole of the external power supply component to the positive pole of the built-in tire pressure sensor component through the conductive component.

[0008] The conductive component of the utility model includes a fourth conductor pre-buried in the valve body: a fourth conductor fixing channel is provided on the cavity wall of the valve body from top to bottom, the fourth conductor is fixed in the fourth conductor placement cavity after being covered with an insulating layer, and a contact electrode for communicating with the conductive component on the valve locking nut or the valve cap is provided at the upper end of the fourth conductor fixing channel corresponding to the upper part of the valve body.

[0009] The utility model further provides that the contact electrode is a sixth contact electrode sheet arranged in a ring shape on the outer periphery of the upper part of the valve body, the sixth contact electrode sheet is connected to the upper end of the fourth conductor, an insulating layer is provided between the sixth contact electrode sheet and the valve body, and the sixth contact electrode sheet is arranged in the connecting area between the valve core body and the valve locking nut.

[0010] The utility model further, corresponding to the sixth contact electrode sheet, a third conductor is embedded in the valve locking nut, and the third conductor is arranged through a third conductor fixing channel opened on the valve locking nut, one end of the third conductor fixing channel is connected to the outside of the valve locking nut, and the other end is connected to the inner cavity of the valve locking nut, wherein the fourth contact electrode sheet is connected to the third conductor and fixed to the end of the third conductor fixing channel close to the inner cavity channel of the valve locking nut to achieve connection with the sixth contact electrode sheet, and the other end of the third conductor extends to the outside of the valve locking nut to be connected to an external power supply component. Further, the external power supply component is a second solar cell coated on the circumference of the valve locking nut and a second control circuit board connected to the second solar cell, and one end of the third conductor is connected to the positive pole of the second control circuit board.

[0011] The contact electrode on the upper part of the valve body of the utility model also includes a fifth contact electrode sheet, which can be annular or partially annular and is insulated from the valve body. The fifth contact electrode sheet is arranged on the upper surface of the annular boss portion on the upper part of the valve body that abuts against the valve cap. The fifth contact electrode sheet is isolated from the valve body by an insulating layer, and only one side is connected to the upper end of the fourth conductor or the sixth contact electrode sheet. Correspondingly, the valve cap is provided with a second conductor fixing channel that vertically passes through the valve cap cavity wall for fixing the second conductor, and a second conductor covered with an insulating layer is arranged in the second conductor fixing channel. After the valve cap and the valve body are threadedly connected, the lower end of the second conductor is connected to the fifth contact electrode sheet, or, in order to improve the connection reliability between the lower end of the second conductor and the fifth contact electrode sheet, an annular third contact electrode sheet is provided on the lower edge end face of the valve cap, and the third contact electrode sheet is connected to the lower end of the second conductor and is electrically isolated from the valve cap by an insulating layer.

[0012] The upper end of the second conductor in the valve cap of the utility model is connected to the positive electrode of the external power supply component, and the external power supply component is a battery or a solar cell, and the battery or the solar cell is installed on the battery cover. Specifically: when a battery is used as an external power supply component, the battery is installed in the battery cover, and the battery cover is connected to the upper end of the valve cap through threads or snap-fitting. The battery cover presses the positive electrode of the battery against the upper end of the second conductor on the valve cap to achieve electrical connection. Furthermore, the upper end surface of the valve cap is provided with a second contact electrode which is horizontally arranged and connected to the upper end of the second conductor. The second contact electrode sheet is in the shape of a ring or a disc covering the upper surface of the valve cap, so as to significantly increase the contact area with the positive electrode of the external power supply component and improve the connection reliability; further, a first contact electrode sheet connected to the second contact electrode sheet is introduced into the inner side of the battery cover, and the first contact electrode sheet can be in the shape of a ring arranged on the lower side of the annular boss on the inner wall of the battery cover, and the first contact electrode sheet is connected through a first conductor pre-embedded in the battery cover, and the other end of the first conductor is connected to the positive electrode of the control circuit board, and the inner wall of the top plate of the battery cover is provided with a spring sheet for connecting to the negative electrode of the battery.

[0013] In the utility model, the outer surface of the battery cover can be provided with a solar cell panel, and a control circuit board connected to the solar cell panel is correspondingly provided, the positive pole of the control circuit board is connected to the first contact electrode sheet via the first conductor, and the negative pole of the control circuit board is connected to the spring located on the inner wall of the top of the battery cover through the battery cover body.

[0014] In the built-in tire pressure sensor assembly of the utility model, a fifth conductor and a sixth conductor are embedded in the outer shell of the sensor, and the ends of the fifth conductor and the sixth conductor are respectively welded to the sensor control circuit board, the fifth conductor is fixedly connected to the eighth contact electrode sheet, and the eighth contact electrode sheet is connected to the seventh contact electrode sheet at the lower end of the valve body, the seventh contact electrode sheet is connected to the lower end of the fourth conductor embedded in the valve body, the sixth conductor is fixedly connected to the ninth contact electrode sheet, and the ninth contact electrode sheet is connected to the lower end of the valve body via a sensor fixing screw, thereby realizing the fixed connection between the sensor and the valve body via the sensor fixing screw. Specifically, the ninth contact electrode sheet is annular, the sensor fixing screw passes through the annular ninth contact electrode sheet and is fixed to the lower end of the valve body via threads, the sensor can be removed from the valve body, and fixed to the valve body via the fixing screw to form a power supply path.

[0015] Compared with the prior art, the utility model embeds conductors in the valve body, the valve cap and the valve locking nut and sets corresponding contact electrode sheets, so that the external power supply component located outside the valve mechanism can achieve electrical connection for the built-in sensor connected to the lower end of the valve body, and can ensure the insulation of any component in the valve mechanism during the process to avoid leakage. The utility model has a reasonable structure, and the structure meets the national standard requirements for valve products. It can complete the replacement of existing products and significantly improve the service life and service life of the built-in tire pressure sensor. Description of the drawings:

[0016] Attached Figure 1 It is a structural schematic diagram of the utility model.

[0017] Attached Figure 2 It is a structural schematic diagram of the battery cover in the utility model.

[0018] Attached Figure 3 The utility model is a structural schematic diagram of the valve cap.

[0019] Attached Figure 4 It is a schematic diagram of the connection between the battery cover and the valve cap in the utility model.

[0020] Attached Figure 5 It is a cross-sectional view of the battery cover and the valve cap in the utility model.

[0021] Attached Figure 6 It is a structural schematic diagram of a valve stem locking nut in the utility model.

[0022] Attached Figure 7 It is a schematic diagram of the internal structure of the valve stem locking nut in the utility model.

[0023] Attached Figure 8 It is a structural schematic diagram of the air valve body in the utility model.

[0024] Attached Fig. 9 It is a schematic diagram of the assembly structure of the utility model.

[0025] Attached Fig.10 It is a schematic diagram of the connection between the sensor and the valve body in the utility model.

[0026] Attached Fig.11 It is a schematic diagram of the local structure of the upper part of the air valve body in the utility model.

[0027] Attached Fig.12 It is a schematic diagram of the bottom structure of the air valve cap in the utility model.

[0028] Attached Fig.13 It is the electrical principle block diagram of the utility model.

[0029] Figure numerals: valve body 1, valve cap 2, valve locking nut 3, gasket 4, sealing rubber ring 5, sensor circuit 6, battery cover 7, solar cell one 8, control circuit board one 9, first conductor 10, first contact electrode sheet 11, conductive spring sheet 12, second contact electrode sheet 13, insulating layer 14, second conductor 15, third contact electrode sheet 16, battery 17, solar cell two 18, control circuit board two 19, third conductor 20, fourth contact electrode sheet 21, waterproof rubber ring 22, sixth contact electrode sheet 23, fifth contact electrode sheet 24, fourth conductor 25, seventh contact electrode sheet 26, eighth contact electrode sheet 27, fifth conductor 28, ninth contact electrode sheet 29, sixth conductor 30, valve core 31, wheel hub 32, sensor fixing screw 33. Specific implementation method:

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Embodiment 1:

[0032] This example provides a tire pressure sensor with an external power supply assembly arranged on a valve cap, which is provided with a tire pressure monitoring sensor and a valve mechanism, wherein the valve mechanism comprises a valve core 31, a valve body 1, a valve locking nut 3 and a valve cap 2, the valve cap 2 is connected to the external power supply assembly, and the lower end of the valve body 1 is connected to a built-in tire pressure sensor assembly;

[0033] The valve cap 2 connects the negative pole of the external power supply assembly to the valve body 1. In this example, the external power supply assembly is arranged on the battery cover 7. The battery cover 7 is made of a conductive material. The battery cover 7 is connected to the upper end of the valve cap 2 via threads. The negative pole of the built-in tire pressure sensor assembly is connected to the valve body 1. The valve cap 2 connects the positive pole of the external power supply assembly to the positive pole of the built-in tire pressure sensor assembly via a conducting component.

[0034] As shown in the accompanying drawings, the conductive component includes three parts: a conductive component arranged on the battery cover 7, a conductive component arranged on the valve cap 2, and a conductive component arranged on the valve body 1;

[0035] The conductive component arranged on the battery cover 7 includes a first conductor 10 pre-buried in the battery cover 7 and connected to the external power supply assembly, and a first contact electrode sheet 11 connected to the lower end of the first conductor 10, and the first contact electrode sheet 11 is connected to the second contact electrode sheet 13 at the upper end of the valve cap 2 when the battery cover 7 is connected to the valve cap 2;

[0036] The conductive component arranged on the valve cap 2 includes: a second contact electrode sheet 13 arranged on the upper surface of the valve cap 2, a second conductor 15 pre-buried in the valve cap body and connected to the second contact electrode sheet 13, and a third contact electrode sheet 16 located at the lower edge of the valve cap and connected to the lower end of the second conductor 15, wherein the third contact electrode sheet 16 is annular;

[0037] The conductive component arranged on the valve body 1 includes a fourth conductor 25 pre-buried in the valve body 1 along the vertical direction, and the upper end of the fourth conductor 25 is connected to the third contact electrode sheet 16. In order to ensure that the upper end of the fourth conductor 25 is stably connected to the third contact electrode sheet 16, an annular boss is provided on the valve body 1 at a position corresponding to the third contact electrode sheet 16, and an annular fifth contact electrode sheet 24 insulated from the valve body 1 is provided on the upper surface of the annular boss, so that when the valve cap body 1 is connected to the valve body through threads, the fifth contact electrode sheet 24 is pressed against the third contact electrode sheet 16, the fifth contact electrode sheet 24 is connected to the upper end of the fourth conductor 25 pre-buried in the valve body 1, and the lower end of the fourth conductor 25 is connected to the tire pressure sensor.

[0038] Embodiment 2:

[0039] This example provides a tire pressure sensor in which an external power supply assembly is arranged on a valve stem locking nut, and is provided with a tire pressure monitoring sensor and a valve stem mechanism, wherein the valve stem mechanism comprises a valve core, a valve stem body, a valve stem locking nut and a valve stem cap, the valve stem locking nut is connected to the external power supply assembly, and the lower end of the valve stem body is connected to a built-in tire pressure sensor assembly;

[0040] The valve locking nut 3 connects the negative pole of the external power supply assembly with the valve body 1. In this example, the external power supply assembly is arranged on the valve locking nut 3. In this example, the external power supply assembly is realized by a solar cell covering the outer periphery of the valve locking nut 3. The solar cell includes a solar cell panel and a control circuit arranged on a control circuit board; the valve locking nut 3 is threadedly connected to the valve body 1; the negative pole of the built-in tire pressure sensor assembly is connected to the valve body 1, and the valve locking nut 3 connects the positive pole of the external power supply assembly (i.e., the positive pole of the control circuit) to the positive pole of the built-in tire pressure sensor assembly via a conducting component;

[0041] The conductive component of this example is shown in the accompanying drawings, and includes two parts: a conductive component arranged on the valve locking nut 3 and a conductive component arranged on the valve body 1;

[0042] The conducting component arranged on the valve locking nut 3 comprises a third conductor 20 covered with an insulating layer and pre-buried in the valve locking nut 3 body, one end of the third conductor 20 is exposed outside the valve locking nut 3 and connected to the positive terminal of the control circuit, and the other end of the third conductor 20 is exposed inside the valve locking nut 3 and connected to the fourth conductor 25 on the valve body;

[0043] The conductive component arranged on the valve body 1 includes a fourth conductor 4 pre-buried in the valve body along the vertical direction. The lower end of the fourth conductor 4 is connected to the tire pressure sensor. In order to ensure that the upper end of the fourth conductor 4 is stably connected to the third conductor 20, the valve body 1 and the corresponding area of ​​the third conductor 20 are also provided with an annular sixth contact electrode sheet 23 arranged along the outer periphery of the valve body 1. The sixth contact electrode sheet 23 is isolated from the valve body 1 by an insulating layer, and the sixth contact electrode sheet 23 is connected to the upper end of the fourth conductor 25.

[0044] Embodiment 3:

[0045] This example provides a tire pressure monitoring device with an external power supply, wherein the external power supply component is disposed on both the valve stem locking nut and the valve stem cap;

[0046] In this example, if the attached Figure 1 As shown in FIG. 1 , the valve mechanism is composed of a valve body 1, a valve cap body 2, a valve locking nut 3 body, a gasket 4, a sealing rubber ring 5, and a sensor circuit 6. The valve cap in this example is composed of a battery cover 7 and a valve cap 2. Figure 2 As shown, the battery cover 7 is covered with a solar cell, which is denoted as a solar cell 8, and a control circuit board 9 is provided below the solar cell. The positive output of the control circuit board 9 is connected to a first contact electrode sheet 11 formed in an annular shape on the inner wall of the battery cover 7 through a first conductor 10 pre-buried in the battery cover 7, and the negative electrode is connected to a conductive spring sheet 12 inside the battery cover 7 through the battery cover 7. In this example, the battery cover 7 is made of aluminum or other metal materials, and the surface of the first conductor 10 is covered with an insulating material to prevent short circuit caused by contact with the outer shell of the battery cover 7.

[0047] As attached Figure 3 And attached Fig.12As shown, in this example, the upper surface of the valve cap 2 body is covered by the second contact electrode sheet 13, and there is an insulating layer 14 under the second contact electrode sheet 13, so that the second contact electrode sheet 13 is insulated from the valve cap 2 body, and the second contact electrode sheet 13 is connected to the third contact electrode sheet 16 located at the lower edge of the valve cap 2 through the second conductor 15 pre-buried in the valve cap 2 body. In order to realize the placement of the second conductor 15, the valve cap 2 body is provided with a through second conductor fixing channel from top to bottom, and the outer surface of the second conductor 15 is covered with an insulating layer. The third contact electrode sheet 16 can be arranged in a ring shape, and the third contact electrode sheet 16 and the valve cap 2 body are also electrically isolated through the insulating layer;

[0048] As attached Figure 4 and attached Figure 5 As shown, after the battery 17 is loaded into the battery cover 7 and the valve cap 2 body is screwed in, the second contact electrode sheet 13 is connected to the first contact electrode sheet 11, the lower surface of the battery 17 is connected to the second contact electrode sheet 13, the upper surface of the battery 17 is connected to the conductive spring sheet 12, the input end of the control circuit board 9 is connected to the input of the solar cell, the output positive electrode of the control circuit board 9 is connected to the positive electrode of the battery 17 through the first conductor 10, the first contact electrode sheet 11, and the second contact electrode sheet 13, and the output negative electrode of the control circuit board 9 is connected to the negative electrode of the battery through the shell of the battery cover 7 and the conductive spring sheet 12, so as to realize the charging of the battery. In addition, the positive electrode of the battery 17 is connected to the third contact electrode sheet 16 through the second conductor 15;

[0049] As attached Figure 6 As shown, in this example, the outer surface of the valve stem locking nut 3 is covered with a solar cell 2 18, and a control circuit board 2 19 is correspondingly provided on the upper part of the solar cell 2 18. The input end of the control circuit board 2 19 is connected to the solar cell 2 18, and the positive electrode of the control circuit board 2 19 is connected to the fourth contact electrode sheet 21 through the third conductor 20. In this example, a waterproof rubber ring 22 is provided above the fourth contact electrode sheet, and the waterproof rubber ring 22 can effectively prevent pollutants from entering the interior and causing leakage; the surface of the fourth contact electrode sheet 21 is smooth and has a chamfer so that the fourth contact electrode sheet 21 can slide easily on the sixth contact electrode sheet 23 and have good contact;

[0050] Correspondingly, the valve body 1 is provided with a fifth contact electrode sheet 24 and a sixth contact electrode sheet 23, wherein the fifth contact electrode sheet 24 is located on the upper surface of an annular boss on the upper part of the valve body 1, and the fifth contact electrode sheet 24 is partially annular in this example, and the planar annular area on the upper surface of the annular boss is covered with insulating material except for the fifth contact electrode sheet 24, and the sixth contact electrode sheet 23 covers the surface area of ​​the valve body 1 and is connected to the fifth contact electrode sheet 24, and an insulating material is provided between the sixth contact electrode sheet 23 and the valve body, so that the sixth contact electrode sheet 23 is insulated from the valve body 1, and when the valve locking nut 3 is tightened, the fourth contact electrode sheet 21 is connected to the sixth contact electrode sheet 23 on the valve body 1;

[0051] When the valve cap 2 is locked on the valve body 1, the positive pole of the control circuit board 2 19 is connected to the positive pole of the battery 17 through the third conductor 20, the fourth contact electrode sheet 21, the sixth contact electrode sheet 23, the fifth contact electrode sheet 24, the third contact electrode sheet 16, the second conductor 15, and the second contact electrode sheet 13 in sequence; the negative pole of the control circuit board 2 19 is connected to the negative pole of the battery 17 through the thread, the valve body 1, the thread of the valve cap 3, the valve cap body 1, the thread of the battery cover, the battery cover 7 body, the conductive spring 12, and the negative pole of the battery 17 in sequence to charge the battery.

[0052] When the valve cap 2 is not locked on the valve body 1, the positive electrode of the control circuit board 2 19 in this example can be directly connected to the positive input of the sensor circuit through the third conductor 20, the fourth contact electrode sheet 21, the sixth contact electrode sheet 23, the fifth contact electrode sheet 24, the fourth conductor 25, the seventh contact electrode sheet 26, the eighth contact electrode sheet 27, and the fifth conductor 28:

[0053] The fourth conductor 25 and the sensor housing are separated from the valve body 1 by an insulating material, which also plays the role of insulation and sealing;

[0054] The negative pole of the control circuit board 2 19 is connected to the negative input of the sensor circuit through the thread, the valve body 1, the sensor fixing screw, the ninth contact electrode sheet 29, and the sixth conductor 30 in sequence, and the sensor is directly powered, wherein the fifth conductor 28 and the sixth conductor 30 are buried in the sensor housing, and the ends of the fifth conductor 28 and the sixth conductor 30 are respectively welded to the circuit board, and the ninth contact electrode sheet 29 is annular and connected to the valve body 1 through the sensor fixing screw;

[0055] When the valve cap 2 is locked on the valve body 1, the insulating layer is made of elastic material and will retreat backwards, thereby ensuring that the third contact electrode sheet 16 and the fifth contact electrode sheet 24 are in good contact, and the area outside the contact is the insulating layer 14 without any exposed conductor, so as to prevent leakage caused by dirt;

[0056] This example also provides a circuit diagram as shown in the attached Fig.13 As shown, the control board circuit board consists of two functional parts, a charge and discharge control circuit and a reverse leakage prevention circuit. The charge and discharge control circuit first stores the weak current generated by the solar cell, stores the weak photocurrent in the capacitor, and slowly increases the voltage across the capacitor. When a certain voltage is reached, the boost circuit charges the battery with the energy stored in the capacitor through boosting. Because solar cells have leakage current in a dim or no light environment, the reverse leakage prevention circuit prevents the battery from leaking through the solar cell.

[0057] The sensor described in this example includes a reverse leakage prevention circuit, an energy storage boost circuit, an air pressure detection circuit, and a wireless transmission circuit. The reverse leakage prevention circuit is mainly used to prevent the reverse leakage of the electricity stored in the sensor due to external dirt. In the case of weak leakage due to dirt, because the control circuit board 1 and the control circuit board 2 of the solar cell output a relatively large current after energy storage, the energy can be input into the internal circuit at certain periodic intervals, and the internal circuit will make a secondary adjustment to the voltage through the energy storage boost circuit. It can effectively prevent the entire circuit from failing to work due to weak leakage due to dirt.

[0058] In the tire pressure monitoring device provided in this example, the tire pressure receiving device and the wheel matching method are simpler. By unscrewing the valve cap and using the light shielding method, the sensor can be powered off. The tire pressure receiving device first turns on the listening function and prompts the user to power on the left front wheel. The user powers the sensor by tightening the valve cap or shining light on the wheel. When the tire pressure receiving device receives the radio signal, it identifies the data header of the tire pressure sensor (each sensor has a unique code) and records the current sensor data header and wheel. In the same way, the right front wheel, right rear wheel, and left rear wheel are powered on in turn to complete the matching of each tire pressure sensor with the corresponding wheel on the tire pressure receiving device. In this example, during use, the positive and negative poles of the power supply can be interchanged without affecting normal functions. It only needs to swap the positive and negative poles on the circuit board. Compared with the prior art, a sensor circuit with lower power consumption or a sensor that measures the air pressure at a larger time interval is used. The external power supply components in the system: solar cell 1 and control circuit board 1, solar cell 2 and control circuit board 2, rechargeable battery, any one of which can be retained and the other items can be removed, and the system can still work normally. Among them, the rechargeable battery can be replaced with a disposable battery. During the correspondence between the tire pressure sensor on each wheel and the wheel on the tire pressure receiving device, the order can be changed.

Claims

1. An externally powered tire pressure monitoring device, provided with a tire pressure monitoring sensor and a valve mechanism, wherein the valve mechanism comprises a valve core, a valve body, a valve locking nut and a valve cap, wherein the valve core is disposed in the valve body, the valve locking nut and the valve cap are respectively connected to the upper portion of the valve body via threads, and the valve cap is fixed above the valve locking nut, wherein the valve core is disposed in the valve body, the valve locking nut and the valve cap are respectively connected to the upper portion of the valve body via threads, and the valve cap is fixed above the valve locking nut, wherein the valve core is disposed in the valve body, the valve locking nut and the valve cap are respectively connected to the upper portion of the valve body via threads, and the valve cap is fixed above the valve locking nut, and wherein the valve core is disposed in the valve body, the valve locking nut and the valve cap are respectively connected to the upper portion of the valve body via threads, and the valve cap is fixed to the upper portion of the valve locking nut, and wherein the valve core is disposed in the valve body, the valve locking nut and the valve cap are respectively connected ... An external power supply assembly is provided at the upper part of the valve mechanism, and the lower end is connected to the built-in tire pressure sensor assembly. The valve mechanism is also provided with a conducting component for realizing electrical connection between the external power supply assembly and the built-in tire pressure sensor assembly; the external power supply assembly is arranged on the valve locking nut, or on the valve cap; the valve cap or the valve locking nut connects the negative pole of the external power supply assembly to the valve body through threads, the negative pole of the built-in tire pressure sensor assembly is connected to the valve body, and the valve cap or the valve locking nut connects the positive pole of the external power supply assembly to the positive pole of the built-in tire pressure sensor assembly through the conducting component.

2. The tire pressure monitoring device with external power supply according to claim 1, characterized in that: The conductive component includes a fourth conductor pre-buried in the valve body: a fourth conductor fixing channel is set from top to bottom on the cavity wall of the valve body, the fourth conductor is fixed in the fourth conductor placement cavity after being covered with an insulating layer, and a contact electrode is provided at the upper end of the fourth conductor fixing channel corresponding to the upper part of the valve body for communicating with the conductive component on the valve locking nut or the valve cap.

3. The tire pressure monitoring device with external power supply according to claim 2, characterized in that: The contact electrode is a sixth contact electrode sheet arranged in a ring shape on the outer periphery of the upper part of the valve body, the sixth contact electrode sheet is connected to the upper end of the fourth conductor, an insulating layer is provided between the sixth contact electrode sheet and the valve body, and the sixth contact electrode sheet is arranged in the connecting area between the valve body and the valve locking nut.

4. The tire pressure monitoring device with external power supply according to claim 3, characterized in that: Corresponding to the sixth contact electrode sheet, a third conductor is embedded in the valve locking nut, and the third conductor is arranged through a third conductor fixing channel opened on the valve locking nut, one end of the third conductor fixing channel is connected to the outside of the valve locking nut, and the other end is connected to the inner cavity of the valve locking nut, wherein the fourth contact electrode sheet is connected to the third conductor and fixed at the end of the third conductor fixing channel close to the inner cavity channel of the valve locking nut to achieve connection with the sixth contact electrode sheet, and the other end of the third conductor extends to the outside of the valve locking nut to be connected to an external power supply component. Furthermore, the external power supply component is a second solar cell coated on the circumference of the valve locking nut and a second control circuit board connected to the second solar cell, and one end of the third conductor is connected to the positive pole of the second control circuit board.

5. The tire pressure monitoring device with external power supply according to claim 3, characterized in that: The contact electrode on the upper part of the valve body also includes a fifth contact electrode sheet, which is partially annular or annular, and is arranged on the upper surface of the annular boss portion on the upper part of the valve body that abuts against the valve cap. The fifth contact electrode sheet is isolated from the valve body by an insulating layer, and only one side is connected to the upper end of the fourth conductor or the sixth contact electrode sheet. Correspondingly, the valve cap is provided with a second conductor fixing channel that vertically passes through the valve cap cavity wall for fixing the second conductor, and a second conductor covered with an insulating layer is arranged in the second conductor fixing channel. After the valve cap and the valve body are threadedly connected, the lower end of the second conductor is connected to the fifth contact electrode sheet, or, in order to improve the connection reliability between the lower end of the second conductor and the fifth contact electrode sheet, an annular third contact electrode sheet is provided on the lower edge end face of the valve cap, and the third contact electrode sheet is connected to the lower end of the second conductor and is electrically isolated from the valve cap by an insulating layer.

6. The tire pressure monitoring device with external power supply according to claim 5, characterized in that: The upper end of the second conductor in the valve cap is connected to the positive pole of an external power supply component, and the external power supply component is a battery or a solar cell. The battery or the solar cell is installed on the battery cover. When a battery is used as an external power supply component, the battery is installed in the battery cover, and the battery cover is connected to the upper end of the valve cap via threads or snap-fits. The battery cover presses the positive pole of the battery against the upper end of the second conductor on the valve cap to achieve electrical connection.

7. The tire pressure monitoring device with external power supply according to claim 6, characterized in that: The upper end surface of the valve cap is provided with a horizontally arranged second contact electrode sheet connected to the upper end of the second conductor. The second contact electrode sheet is annular or disc-shaped covering the upper surface of the valve cap, so as to significantly increase the contact area with the positive electrode of the external power supply component and improve the connection reliability. The first contact electrode sheet connected to the second contact electrode sheet is introduced into the inner side of the battery cover. The first contact electrode sheet is connected via a first conductor pre-buried in the battery cover. The other end of the first conductor is connected to the positive electrode of the battery. The inner wall of the top plate of the battery cover is provided with a spring sheet for connecting to the negative electrode of the battery.

8. The tire pressure monitoring device with external power supply according to claim 7, characterized in that: A solar panel is provided on the outer surface of the battery cover, and a control circuit board connected to the solar panel is provided correspondingly. The positive pole of the control circuit board is connected to the first contact electrode sheet via the first conductor, and the negative pole of the control circuit board is connected to the spring located on the inner wall of the top of the battery cover.

9. The tire pressure monitoring device with external power supply according to claim 1, characterized in that: The fifth conductor and the sixth conductor are embedded in the outer shell of the sensor in the built-in tire pressure sensor assembly, and the ends of the fifth conductor and the sixth conductor are respectively welded to the sensor control circuit board, the fifth conductor is fixedly connected to the eighth contact electrode sheet, and the eighth contact electrode sheet is connected to the seventh contact electrode sheet at the lower end of the valve body, the seventh contact electrode sheet is connected to the lower end of the fourth conductor embedded in the valve body, the sixth conductor is fixedly connected to the ninth contact electrode sheet, and the ninth contact electrode sheet is connected to the lower end of the valve body via the sensor fixing screws, thereby realizing the fixed connection between the sensor and the valve body through the sensor fixing screws.

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