A wireless power supply device for automobile tire pressure monitor

Abstract

The present invention discloses a wireless power supply device for a tire pressure monitor for automobiles, comprising a device body, an internal mainboard, a wireless transmission component, a controller, a display screen, a charging circuit, a wireless transmission component, a controller, a built-in lithium battery, a visual cavity, an inward opening, an insertion opening, an external circuit board, a wireless receiving coil, and an automatic anti-drop unit. The present invention has the following advantages and effects: the wireless receiving coil is arranged on the external circuit board, separated from the internal mainboard in the device body, and is singulated; the automatic anti-drop unit is arranged to limit the external circuit board against the inward opening to prevent the external circuit board from falling out of the insertion opening due to gravity.

Description

Technical Field

[0001] The invention relates to automobile monitoring, and in particular to a wireless power supply device for an automobile tire pressure monitor. Background Art

[0002] With the rapid development of automobile technology, people have higher requirements for automobile safety and reliability. Automobile tire pressure monitoring will not only affect the normal operation of the car, but may even cause safety accidents. In order to ensure the safety of the car, the implementation of the automobile tire pressure monitoring system is becoming more and more important. At present, the tire pressure monitoring system is mainly divided into indirect tire pressure monitoring system and direct tire pressure monitoring system.

[0003] In order to improve the convenience of tire pressure monitoring, a Chinese patent with application number CN202021990292.5 discloses a wireless tire pressure monitoring terminal and a vehicle tire pressure monitoring system. The wireless tire pressure monitoring terminal includes: a terminal body, having a first end and a second end opposite to each other along the length direction; a handheld terminal, the handheld terminal is arranged at the first end of the terminal body; a circuit board, the circuit board is arranged in the terminal body, close to the second end of the terminal body, and is used to wirelessly receive the tire pressure signal of the vehicle tire for processing, and output the tire pressure data of the vehicle tire.

[0004] In the above patent, a wireless transmission component is provided to wirelessly connect to the tire pressure sensor in the automobile tire to receive the tire pressure signal of the automobile wheel; a controller is provided to process the automobile tire pressure signal received by the wireless transmission component and output the automobile tire pressure data. However, the power supply problem needs to be considered in actual use. In order to reduce battery costs, rechargeable lithium batteries are used in the prior art; at the same time, in order to improve the convenience and safety of charging and the universality of charging standards, wireless charging technology is used. For wireless charging technology, the wireless receiving coil is prone to burn out when it is continuously in a high-temperature working state, and it is also prone to oxidation, causing the surface resistance to increase, resulting in a decrease in charging efficiency. Therefore, it is necessary to replace the damaged wireless receiving coil so that the device can continue to be used; the existing technology for replacing wireless receiving coils has the following pain points:

[0005] ① The process of disassembling the wireless receiving coil is cumbersome. First, you need to use tools such as screwdrivers to disassemble the entire device body, which is time-consuming and labor-intensive. In addition, the screws used for fixing are prone to rust or surface thread wear, which further increases the difficulty of disassembly.

[0006] ② The wireless receiving coils are all welded on the inner mainboard. When welding and replacing the wireless receiving coils, it is easy to cause the soldering pads on the inner mainboard to fall off, resulting in the inner mainboard being scrapped; at the same time, the electronic components on the inner mainboard are easily bumped and damaged. Summary of the invention

[0007] The purpose of the present invention is to provide a wireless power supply device for a tire pressure monitor of an automobile to solve the problems raised in the background technology.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions:

[0009] A wireless power supply device for a tire pressure monitor for an automobile comprises a device body, an internal mainboard is fixedly arranged in the device body, a wireless transmission component for wirelessly receiving tire pressure signals of automobile tires, a controller electrically connected to the wireless transmission component for processing the received tire pressure signals, a display screen electrically connected to the controller for displaying the tire pressure signals processed by the controller, and a charging circuit are arranged on the internal mainboard; a built-in lithium battery for powering the wireless transmission component, the controller and the display screen is fixedly arranged in the device body; a visual cavity for the display screen to be exposed is provided on the surface of the device body;

[0010] The lower end of the internal main board is provided with a recessed opening, the lower end of the device body is provided with an insertion opening, the insertion opening is located directly below the recessed opening, an external circuit board is inserted upward in the insertion opening, a wireless receiving coil is arranged on the external circuit board, the external circuit board will continue to move upward after being inserted from the insertion opening, and extend into the recessed opening, when the external circuit board abuts against the recessed opening, the wireless receiving coil will form an electrical connection with the charging circuit and charge the built-in lithium battery;

[0011] An automatic anti-drop unit is arranged in the body of the device, and the automatic anti-drop unit can limit the external circuit board against the recessed opening to prevent the external circuit board from falling out of the insertion opening due to gravity.

[0012] A further configuration is: two electrical pins are welded on the external circuit board, and two electrical sockets are welded on the internal main board. When the external circuit board is against the recessed opening, the two electrical pins will be respectively inserted into the two electrical sockets to achieve electrical connection between the wireless receiving coil and the charging circuit.

[0013] Further configuration is: the automatic anti-slip unit is composed of two side anti-slip components, there is a gap between the two side anti-slip components, and a connecting cavity is formed to connect the insertion opening and the recessed opening; each side anti-slip component includes an inner fixing seat fixed in the device body, the inner fixing seat is provided with a main spring and a main displacement block, the main displacement block can slide horizontally in the inner fixing seat, and the main displacement block has an inward displacement state based on the action force of the main spring;

[0014] The inner side of the main shift block has an inclined top opening surface and a vertical contact surface, and the contact surface is located at the upper end of the top opening surface; after the external circuit board is extended into the connecting cavity, it will contact with the top opening surface and gradually push the main shift block open to keep moving upward; when the external circuit board is extended into the recessed opening, the contact surface will be attached to the side wall of the external circuit board; when the external circuit board is against the recessed opening, the main shift block will be attached to the lower end of the external circuit board to achieve support and limitation of the external circuit board.

[0015] A further configuration is that a recessed groove is provided on the inner side of the main shift block, a ball is provided in the recessed groove, the inner side of the recessed groove is a notch, and a welding point is provided at the notch of the recessed groove to prevent the ball from falling out.

[0016] The further arrangement is: the inner fixed seat is spliced ​​by a lower fixed seat and an upper fixed seat, the lower fixed seat and the upper fixed seat are fixed by a first bolt, an internal main road and an internal auxiliary road are formed between the lower fixed seat and the upper fixed seat, the internal main road is horizontally connected, the main shift block is located in the internal main road for horizontal sliding, the internal auxiliary road is located at the upper end of the internal main road, the two sides of the internal auxiliary road are respectively closed by the upper fixed seat and the lower fixed seat, a relay shift block is slidably arranged in the internal auxiliary road, the relay shift block and the main shift block are fixed by a second bolt, the main spring located in the internal auxiliary road is squeezed between the outer side of the relay shift block and the upper fixed seat, the main spring provides an inward movement force for the relay shift block, and the main shift block moves inward synchronously.

[0017] Further configuration is: a driving shift block is slidingly arranged in the internal main track, the relay shift block is fixed to the driving shift block by a third bolt, the inner side of the driving shift block has an inclined driving surface, a vertical through hole is opened in the lower fixed seat, a vertical force rod is passed through the through hole, the upper end surface of the force rod has an inclined force surface, the slope of the force surface is consistent with that of the driving surface, and by pushing up the force rod, a driving force for outward movement can be applied to the driving shift block, and the main shift block moves outward synchronously.

[0018] A further configuration is that a hand push plate for the operator's hand to be placed is fixedly provided at the lower end of the force applying rod, a limiting notch is provided on the outer side of the lower end of the hand push plate, a limiting square plate is fixedly provided at the lower end of the device body by a fourth bolt, and the limiting square plate can extend into the limiting notch to limit the hand push plate.

[0019] A further configuration is that a vertical extension block is fixedly provided at the upper end of the hand push plate, a lower slot is provided at the lower end of the lower fixed seat, the extension block remains extended into the lower slot, and an inner spring is provided in the lower slot to provide downward force for the extension block.

[0020] The further configuration is: an ejection seat is fixedly provided in the body of the device, the ejection seat is located at the upper end of the recessed opening, the internal mainboard is provided with an installation notch for the ejection seat, an ejection cavity is provided in the ejection seat, an ejection spring and an ejection block are provided in the ejection cavity, and the ejection block has a downward movement state under the action of the ejection spring; when the external circuit board is against the recessed opening, the ejection block will be squeezed into the ejection cavity by the external circuit board; a side guide block is fixedly provided on the right side of the ejection block and is in contact with the right inner wall of the ejection cavity, and a side stopper is fixedly provided on the right inner wall of the lower end of the ejection cavity by a fifth bolt, and the side stopper can be against the side guide block to prevent the ejection block from slipping out of the ejection cavity; an ejection gap is formed between the side stopper and the side guide block.

[0021] Further configuration is: a square filling block is fixedly arranged at the lower end of the inner side of the relay shift block, a square inner cavity is formed between the square filling block, the relay shift block and the lower fixed seat, an inner vent hole connected to the square inner cavity is opened in the upper fixed seat, and an inner vent pipe connected to the inner vent hole is fixedly arranged on the upper end surface of the upper fixed seat;

[0022] The device body is provided with a ventilation hose for connecting the internal ventilation pipes in the two side anti-detachment components, and the right side wall of the device body is provided with an external connecting pipe connected with the ventilation hose.

[0023] The beneficial effects of the present invention are:

[0024] 1. In the present invention, the wireless receiving coil is configured on an external circuit board, which is separated from the internal main board in the device body to achieve individualization; in this way, welding the wireless receiving coil only needs to be performed on the external circuit board, which will not affect the internal main board, and can effectively prevent the internal main board from being damaged by the pad falling out. When installing the external circuit board, it is inserted from the insertion opening to the recessed opening from bottom to top, which will not bump into the electronic components on the internal main board, making it safer; at the same time, when disassembling the external circuit board, the external circuit board can fall with gravity, which has the advantage of labor-saving disassembly. The automatic anti-detachment unit is set to limit the external circuit board against the recessed opening to prevent the external circuit board from falling out of the insertion opening due to gravity.

[0025] 2. In the present invention, the electrical connection between the wireless receiving coil and the charging circuit is achieved by electrical plugging of two electrical pins and two electrical sockets, which has the advantage of convenient connection.

[0026] 3. In the present invention, the connecting cavity between the two side anti-detachment components provides space for the external circuit board to move upward; the main shift block has an inwardly moved state under the action of the main spring to ensure the support and limit of the external circuit board under normal conditions; the setting of the top opening surface can contact the external circuit board and guide the external circuit board to gradually push open the main shift block during the upward movement, thereby improving the continuity of the external circuit board insertion.

[0027] 4. In the present invention, during the insertion process of the external circuit board, its side wall will have a period of contact with the contact surface, and wear will occur during this process; by providing the ball bearings, the wear of the side wall of the external circuit board can be effectively prevented, thereby extending the service life.

[0028] 5. In the present invention, the lower fixed seat and the upper fixed seat are spliced ​​together to facilitate the assembly of the internal structure; the main spring in the internal auxiliary channel provides the relay shift block with a force to move rightward, and the main shift block is fixed to the relay shift block and will move inward synchronously; the upper fixed seat closes the outer side of the internal auxiliary channel and can support the outer end of the main spring.

[0029] 6. In the present invention, the driving shift block is fixed to the relay shift block, and the force rod will penetrate into the through hole. Based on the cooperation between the force surface and the driving surface, when the force rod moves upward, the driving shift block will move outward, and the main shift block will move outward synchronously to be hidden in the internal main channel, so as to facilitate the disassembly of the external circuit board.

[0030] 7. The hand push plate in the present invention can be placed for the operator's hand to push up, so that the force rod can move up; when the main shift blocks in the two side anti-detachment components are hidden in the corresponding internal main channels, the external circuit board will fall into the palm of the hand due to gravity, and the disassembly can be completed in one go, which is very convenient.

[0031] 8. In the present invention, the extension block is located in the lower slot, which can further prevent the hand push plate from shifting in the horizontal direction; the inner spring provides a downward force for the extension block, thereby preventing the force rod from hindering the normal inward movement of the displacement block.

[0032] 9. In the present invention, since the two electrical pins and the two electrical sockets adopt an electrical plug-in structure, the external circuit board will not easily fall to the palm of the operator with gravity; in order to solve this problem, a push-out block and a push-out spring are provided, and the push-out block has a downward movement under the action of the push-out spring. When the main displacement blocks in the two side anti-detachment components are hidden in the corresponding internal main channels, the push-out block can push the external circuit board downward under the action of the push-out spring, so that the two electrical pins and the two electrical sockets can be quickly separated, and the external circuit board can smoothly fall to the palm of the operator with gravity, which improves the convenience of disassembly. The side block can abut against the side guide block to prevent the push-out block from falling out of the push-out cavity.

[0033] 10. The present invention provides another method of disassembling an external circuit board, which is convenient for practical use; by introducing gas into the external connecting pipe, the gas will then be introduced into the square inner cavity in the two side anti-detachment components, and then push the two main shift blocks to be hidden in the corresponding internal main channels, providing the operator with a disassembly operation option. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an embodiment;

[0035] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0036] Figure 3 for Figure 2 Enlarged view of middle part B;

[0037] Figure 4 for Figure 3 Enlarged view of the middle C part;

[0038] Figure 5 for Figure 2 Enlarged view of part D in the middle.

[0039] In the figure: 11, device body; 12, internal main board; 13, controller; 14, display screen; 15, built-in lithium battery; 16, visual cavity; 21, insertion opening; 22, recessed opening; 23, connection cavity; 31, external circuit board; 32, wireless receiving coil; 33, electrical pin; 34, electrical socket; 411, lower fixing seat; 412, upper fixing seat; 413, first bolt; 42, main shift block; 421, top opening surface; 422, contact surface; 43, main spring; 44, recessed groove; 45, ball; 46, welding point; 51, internal main channel; 52, internal auxiliary channel; 53, relay shift block; 54, second screw Bolt; 55, drive displacement block; 551, drive surface; 56, third bolt; 61, through hole; 62, force rod; 621, force surface; 63, push plate; 64, limit notch; 65, fourth bolt; 66, limit square plate; 71, extension block; 72, lower slot; 73, inner spring; 80, installation notch; 81, ejection seat; 82, ejection cavity; 83, ejection spring; 84, ejection block; 85, side guide block; 86, fifth bolt; 87, side stopper; 88, ejection interval; 91, square filling block; 92, square inner cavity; 93, inner vent hole; 94, inner ventilation pipe; 95, ventilation hose; 96, external pipe. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0041] As attached Figures 1 to 5 As shown;

[0042] The present embodiment discloses a wireless power supply device for a tire pressure monitor for an automobile, comprising a device body 11, an internal main board 12 fixedly disposed in the device body 11, the internal main board 12 being provided with a wireless transmission component for wirelessly receiving tire pressure signals of automobile tires, a controller 13 electrically connected to the wireless transmission component for processing the received tire pressure signals, a display screen 14 electrically connected to the controller 13 for displaying the tire pressure signals processed by the controller 13, and a charging circuit; a built-in lithium battery 15 for powering the wireless transmission component, the controller 13 and the display screen 14 is fixedly disposed in the device body 11; a visual cavity 16 for exposing the display screen 14 is provided on the surface of the device body 11.

[0043] It should be noted that the wireless transmission component in this embodiment adopts Quectel BC68 NB-IOT M2M wireless communication module; the controller 13 adopts STM8 single-chip microcomputer; the display screen 14 adopts LCD screen, and the charging circuit is an existing mature circuit and will not be elaborated here.

[0044] The lower end of the internal main board 12 is provided with an indented opening 22, and the lower end of the device body 11 is provided with an insertion opening 21, which is located directly below the indented opening 22. An external circuit board 31 is inserted upward in the insertion opening 21, and a wireless receiving coil 32 is arranged on the external circuit board 31. After the external circuit board 31 is inserted from the insertion opening 21, it will continue to move upward and extend into the indented opening 22. When the external circuit board 31 abuts against the indented opening 22, the wireless receiving coil 32 will be electrically connected to the charging circuit and charge the internal lithium battery 15;

[0045] An automatic anti-drop unit is disposed in the device body 11 , and the automatic anti-drop unit can limit the external circuit board 31 against the recessed opening 22 to prevent the external circuit board 31 from falling out of the insertion opening 21 due to gravity.

[0046] Among them, two electrical pins 33 are welded on the external circuit board 31, and two electrical sockets 34 are welded on the internal main board 12. When the external circuit board 31 is against the recessed opening 22, the two electrical pins 33 will be respectively inserted into the two electrical sockets 34 to realize the electrical connection between the wireless receiving coil 32 and the charging circuit.

[0047] The automatic anti-slip unit is composed of two side anti-slip components, with a gap between the two side anti-slip components, and a connecting cavity 23 is formed to connect the insertion opening 21 and the recessed opening 22; each side anti-slip component includes an inner fixing seat fixed in the device body 11, and a main spring 43 and a main displacement block 42 are arranged in the inner fixing seat, and the main displacement block 42 can slide horizontally in the inner fixing seat, and the main displacement block 42 has an inward displacement state based on the action force of the main spring 43;

[0048] The inner side of the main shift block 42 has an inclined top opening surface 421 and a vertical contact surface 422, and the contact surface 422 is located at the upper end of the top opening surface 421; after the external circuit board 31 is extended into the connecting cavity 23, it will contact the top opening surface 421 and gradually push the main shift block 42 open to keep moving upward; when the external circuit board 31 is extended into the recessed opening 22, the contact surface 422 will stick to the side wall of the external circuit board 31; when the external circuit board 31 is against the recessed opening 22, the main shift block 42 will stick to the lower end of the external circuit board 31 to achieve support and limitation of the external circuit board 31.

[0049] The main displacement block 42 has a recessed groove 44 on its inner side, and a ball 45 is disposed in the recessed groove 44 . The inner side of the recessed groove 44 is a notch, and a welding point 46 is disposed at the notch of the recessed groove 44 to prevent the ball 45 from falling out.

[0050] Among them, the inner fixed seat is spliced ​​by the lower fixed seat 411 and the upper fixed seat 412, and the lower fixed seat 411 and the upper fixed seat 412 are fixed by the first bolt 413, and an inner main road 51 and an inner auxiliary road 52 are formed between the lower fixed seat 411 and the upper fixed seat 412, and the inner main road 51 runs through horizontally, and the main displacement block 42 is located in the inner main road 51 and slides horizontally, and the inner auxiliary road 52 is located at the upper end of the inner main road 51, and the two sides of the inner auxiliary road 52 are respectively closed by the upper fixed seat 412 and the lower fixed seat 411, and a relay displacement block 53 is slidably arranged in the inner auxiliary road 52, and the relay displacement block 53 and the main displacement block 42 are fixed by the second bolt 54, and the main spring 43 located in the inner auxiliary road 52 is squeezed and arranged between the outer side of the relay displacement block 53 and the upper fixed seat 412, and the main spring 43 provides the relay displacement block 53 with an inward movement force, and the main displacement block 42 moves inward synchronously.

[0051] Among them, a driving displacement block 55 is slidingly arranged in the internal main road 51, and the relay displacement block 53 is fixed to the driving displacement block 55 by a third bolt 56. The inner side of the driving displacement block 55 has an inclined driving surface 551, and a vertical through hole 61 is opened in the lower fixed seat 411. A vertical force rod 62 is passed through the through hole 61, and the upper end surface of the force rod 62 has an inclined force surface 621. The slope of the force surface 621 is consistent with that of the driving surface 551. By pushing up the force rod 62, a driving force for outward movement can be applied to the driving displacement block 55, and the main displacement block 42 moves outward synchronously.

[0052] Among them, a hand push plate 63 for the operator to place his hand is fixedly provided at the lower end of the force applying rod 62, and a limiting notch 64 is provided on the outer side of the lower end of the hand push plate 63. A limiting square plate 66 is fixedly provided at the lower end of the device body 11 by a fourth bolt 65, and the limiting square plate 66 can extend into the limiting notch 64 to limit the hand push plate 63.

[0053] Among them, a vertical extension block 71 is fixedly provided at the upper end of the hand push plate 63, and a lower slot 72 is provided at the lower end of the lower fixed seat 411. The extension block 71 remains extended into the lower slot 72, and an inner spring 73 is provided in the lower slot 72 to provide a downward force for the extension block 71.

[0054] Among them, an ejection seat 81 is fixedly provided in the device body 11, and the ejection seat 81 is located at the upper end of the recessed opening 22. The internal main board 12 is provided with a mounting notch 80 for the ejection seat 81. An ejection cavity 82 is provided in the ejection seat 81, and an ejection spring 83 and an ejection block 84 are provided in the ejection cavity 82. The ejection block 84 has a downward movement state under the action of the ejection spring 83; when the external circuit board 31 abuts against the recessed opening 22, the ejection block 84 will be squeezed into the ejection cavity 82 by the external circuit board 31; a side guide block 85 abutting against the right inner wall of the ejection cavity 82 is fixedly provided on the right side of the ejection block 84, and a side stopper 87 is fixedly provided on the right inner wall of the lower end of the ejection cavity 82 by a fifth bolt 86, and the side stopper 87 can abut against the side guide block 85 to prevent the ejection block 84 from slipping out of the ejection cavity 82; an ejection gap 88 is formed between the side stopper 87 and the side guide block 85.

[0055] A square filling block 91 is fixedly arranged at the lower end of the inner side of the relay shift block 53, a square inner cavity 92 is formed between the square filling block 91, the relay shift block 53 and the lower fixed seat 411, an inner vent hole 93 connected to the square inner cavity 92 is opened in the upper fixed seat 412, and an inner vent pipe 94 connected to the inner vent hole 93 is fixedly arranged on the upper end surface of the upper fixed seat 412;

[0056] A ventilation hose 95 connecting the internal ventilation pipes 94 in the two side anti-detachment components is provided in the device body 11 , and an external connecting pipe 96 connected to the ventilation hose 95 is provided in the right side wall of the device body 11 .

[0057] The working principle of this embodiment is:

[0058] ① During installation, the external circuit board 31 equipped with the wireless receiving coil 32 is inserted from the insertion opening 21. After the external circuit board 31 extends into the connection cavity 23, it will contact the top opening surface 421 and gradually push the main displacement block 42 open to keep moving up. When the external circuit board 31 extends into the recessed opening 22, the ball 45 provided on the contact surface 422 will stick to the side wall of the external circuit board 31 to reduce friction. When the external circuit board 31 is against the recessed opening 22, the main displacement block 42 will move inward to stick to the lower end of the external circuit board 31 under the push of the main spring 43, so as to support and limit the external circuit board 31; at this time, the two electrical pins 33 will be respectively inserted into the two electrical sockets 34 to realize the electrical connection between the wireless receiving coil 32 and the charging circuit; the ejection block 84 is squeezed by the external circuit board 31 and moves upward into the ejection cavity 82.

[0059] ② Disassembly method 1: The operator places his hand on the lower end of the hand push plate 63 and then pushes it upward. The force rod 62 will move upward. Based on the cooperation between the force application surface 621 and the driving surface 551, the driving displacement block 55 will move outward, and the main displacement block 42 will move outward synchronously and hide in the internal main road 51. At this time, the external circuit board 31 loses the support and limit of the main displacement block 42 in the two side anti-detachment components. The push-out block 84 can push the external circuit board 31 downward under the force of the push-out spring 83, so that the two electrical pins 33 and the two electrical sockets 34 are quickly separated, and the external circuit board 31 can smoothly fall to the palm of the operator's hand with gravity, which improves the convenience of disassembly.

[0060] ③ Disassembly method two: by introducing gas into the external connecting tube 96, it can be passed into the square inner cavity 92 in the two side anti-detachment components through the ventilation hose 95, and then push the two main shift blocks 42 to hide in the corresponding internal main channels 51; the operator places his hand under the insertion opening 21 to receive the external circuit board 31 that falls out of the insertion opening 21.

[0061] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A wireless power supply device for a tire pressure monitor for an automobile, comprising a device body (11), wherein an internal main board (12) is fixedly arranged in the device body (11), wherein the internal main board (12) is provided with a wireless transmission component for wirelessly receiving tire pressure signals of automobile tires, a controller (13) electrically connected to the wireless transmission component for processing the received tire pressure signals, a display screen (14) electrically connected to the controller (13) for displaying the tire pressure signals processed by the controller (13), and a charging circuit; wherein a built-in lithium battery (15) for powering the wireless transmission component, the controller (13) and the display screen (14) is fixedly arranged in the device body (11); a visual cavity (16) for revealing the display screen (14) is provided on the surface of the device body (11); and the characteristics are as follows: The lower end of the internal main board (12) is provided with a recessed opening (22), the lower end of the device body (11) is provided with an insertion opening (21), the insertion opening (21) is located directly below the recessed opening (22), an external circuit board (31) is inserted upwards in the insertion opening (21), a wireless receiving coil (32) is arranged on the external circuit board (31), after the external circuit board (31) is inserted from the insertion opening (21), it will continue to move upwards and extend into the recessed opening (22), when the external circuit board (31) abuts against the recessed opening (22), the wireless receiving coil (32) will form an electrical connection with the charging circuit and charge the built-in lithium battery (15); An automatic anti-drop unit is provided in the device body (11), and the automatic anti-drop unit can limit the position of the external circuit board (31) against the recessed opening (22) to prevent the external circuit board (31) from falling out of the insertion opening (21) due to gravity; Two electrical pins (33) are welded on the external circuit board (31), and two electrical sockets (34) are welded on the internal main board (12). When the external circuit board (31) is against the recessed opening (22), the two electrical pins (33) are respectively inserted into the two electrical sockets (34), thereby realizing electrical connection between the wireless receiving coil (32) and the charging circuit. The automatic anti-slip unit is composed of two side anti-slip components, with a gap between the two side anti-slip components, and a connecting cavity (23) is formed to connect the insertion opening (21) and the recessed opening (22); each of the side anti-slip components includes an inner fixing seat fixed in the device body (11), and a main spring (43) and a main displacement block (42) are arranged in the inner fixing seat, and the main displacement block (42) can slide horizontally in the inner fixing seat, and the main displacement block (42) has an inward displacement state based on the action force of the main spring (43); The inner side of the main displacement block (42) has an inclined top opening surface (421) and a vertical contact surface (422), and the contact surface (422) is located at the upper end of the top opening surface (421); after the external circuit board (31) is extended into the connection cavity (23), it will contact with the top opening surface (421) and gradually push the main displacement block (42) to keep moving upward; when the external circuit board (31) is extended into the recessed opening (22), the contact surface (422) will stick to the side wall of the external circuit board (31); when the external circuit board (31) is against the recessed opening (22), the main displacement block (42) will stick to the lower end of the external circuit board (31) to achieve support and limit of the external circuit board (31); A recessed groove (44) is provided on the inner side of the main displacement block (42), and a ball (45) is arranged in the recessed groove (44); the inner side of the recessed groove (44) is a notch, and a welding point (46) is arranged at the notch of the recessed groove (44) to prevent the ball (45) from falling out; The inner fixing seat is formed by splicing a lower fixing seat (411) and an upper fixing seat (412); the lower fixing seat (411) and the upper fixing seat (412) are fixed by a first bolt (413); an inner main road (51) and an inner auxiliary road (52) are formed between the lower fixing seat (411) and the upper fixing seat (412); the inner main road (51) is horizontally connected; the main displacement block (42) is located in the inner main road (51) and slides in the horizontal direction; the inner auxiliary road (52) is located at the upper end of the inner main road (51); and the inner auxiliary road The two sides of (52) are respectively closed by an upper fixed seat (412) and a lower fixed seat (411), and a relay shift block (53) is slidably arranged in the internal auxiliary channel (52). The relay shift block (53) and the main shift block (42) are fixed by a second bolt (54). The main spring (43) located in the internal auxiliary channel (52) is squeezed and arranged between the outer side of the relay shift block (53) and the upper fixed seat (412). The main spring (43) provides an inward movement force for the relay shift block (53), and the main shift block (42) moves inward synchronously.

2. The wireless power supply device for a tire pressure monitor of an automobile according to claim 1, characterized in that: A driving displacement block (55) is slidingly arranged in the internal main road (51), and the relay displacement block (53) is fixed to the driving displacement block (55) by a third bolt (56). The inner side of the driving displacement block (55) has an inclined driving surface (551), and a vertical through hole (61) is opened in the lower fixed seat (411). A vertical force rod (62) is inserted in the through hole (61), and the upper end surface of the force rod (62) has an inclined force surface (621). The slope of the force surface (621) is consistent with that of the driving surface (551). By pushing up the force rod (62), a driving force for outward movement can be applied to the driving displacement block (55), and the main displacement block (42) moves outward synchronously.

3. The wireless power supply device for a tire pressure monitor of an automobile according to claim 2, characterized in that: A hand push plate (63) for the operator's hand to be placed is fixedly provided at the lower end of the force application rod (62), and a limiting notch (64) is provided on the outer side of the lower end of the hand push plate (63). A limiting square plate (66) is fixedly provided at the lower end of the device body (11) by a fourth bolt (65), and the limiting square plate (66) can extend into the limiting notch (64) to limit the hand push plate (63).

4. The wireless power supply device for a tire pressure monitor of an automobile according to claim 3, characterized in that: A vertical extension block (71) is fixedly provided at the upper end of the hand push plate (63), a lower slot (72) is provided at the lower end of the lower fixed seat (411), the extension block (71) is kept in a state of extending into the lower slot (72), and an inner spring (73) is provided in the lower slot (72) to provide a downward force for the extension block (71).

5. The wireless power supply device for a tire pressure monitor of an automobile according to claim 1, characterized in that: The device body (11) is fixedly provided with an ejection seat (81), the ejection seat (81) is located at the upper end of the recessed opening (22), the internal main board (12) is provided with a mounting notch (80) for the ejection seat (81), the ejection seat (81) is provided with an ejection cavity (82), the ejection cavity (82) is provided with an ejection spring (83) and an ejection block (84), the ejection block (84) is in a downwardly moving state under the action of the ejection spring (83); when the external circuit board (31) abuts against the recessed opening (22), the ejection spring (83) and the ejection block (84) are moved downwardly. ), the ejection block (84) will be squeezed into the ejection cavity (82) by the external circuit board (31); a side guide block (85) is fixedly provided on the right side of the ejection block (84) and is in contact with the right inner wall of the ejection cavity (82); a side stopper (87) is fixedly provided on the right inner wall of the lower end of the ejection cavity (82) by a fifth bolt (86); the side stopper (87) can abut against the side guide block (85) to prevent the ejection block (84) from escaping from the ejection cavity (82); an ejection gap (88) is formed between the side stopper (87) and the side guide block (85).

6. The wireless power supply device for a tire pressure monitor of an automobile according to claim 2, characterized in that: A square filling block (91) is fixedly arranged at the lower end of the inner side of the relay shift block (53); a square inner cavity (92) is formed between the square filling block (91), the relay shift block (53) and the lower fixed seat (411); an inner vent hole (93) connected to the square inner cavity (92) is opened in the upper fixed seat (412); an inner vent pipe (94) connected to the inner vent hole (93) is fixedly arranged on the upper end surface of the upper fixed seat (412); The device body (11) is provided with a ventilation hose (95) for connecting the internal ventilation pipes (94) in the two side anti-detachment components, and the right side wall of the device body (11) is provided with an external connection pipe (96) connected to the ventilation hose (95).

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