Digital display tire pressure gun sensing device

Abstract

The utility model belongs to the technical field of sensors, tire detection and digital display instruments, and particularly relates to a digital display tire pressure gun sensing device which is characterized in that a body is of an integrated structure consisting of a front end part and a handle part, the front end part is connected with a front protective cover to form a front end accommodating cavity, and the handle part is of a cavity structure and is communicated with the front end accommodating cavity; the air inlet connector is connected with the handle part and communicated with the cavity structure, the air pressure sensor assembly is arranged in the front end containing cavity, the inflation tube assembly is installed at the front end of the body and communicated with the front end containing cavity, a battery groove is formed in the front end of the body, and the battery is installed in the battery groove and connected with the air pressure sensor assembly through a wire. A liquid crystal screen is arranged on the front protective cover and connected with the air pressure sensor assembly through a wire. The digital display tire pressure gun sensing device is superior to an existing external instrument type digital display tire pressure gun in multiple aspects, and has higher accuracy, better anti-seismic and anti-falling performance, a larger measuring range, more unit choices and higher portability.

Description

Technical Field

[0001] The utility model belongs to the technical fields of sensors, tire detection and digital display instruments, and particularly relates to a digital display tire pressure gun sensing device. Background Technique

[0002] The maintenance and upkeep of automobile tires are of great importance, and the monitoring and adjustment of tire pressure are key links. Correct tire pressure can not only improve the driving safety and economy of vehicles, but also extend the service life of tires. Therefore, portable and easy-to-use tire pressure gauges have become an important part of automobile maintenance tools. At the same time, with the development of sensor technology, signal processing technology and digital display instrument technology, traditional mechanical pressure gauges have gradually been replaced by digital display pressure gauges.

[0003] Existing digital display tire pressure guns usually adopt an external instrument design, that is, the sensor part is separated from the display part. The sensor is installed inside the object to be measured (such as a tire), and the measurement data is transmitted to an external display instrument through a wire. Although this design can achieve relatively accurate measurement, due to the existence of wires and connectors, the entire system is more vulnerable to external environments such as vibration and humidity, thus affecting the accuracy and stability of the measurement results. In addition, the external instrument design also makes the entire system larger in size, inconvenient to carry and use.

[0004] Existing digital display tire pressure guns have some problems in actual use. First, due to the existence of wires and connectors, the seismic resistance and anti-drop performance of the system are poor, and it is easily affected by the external environment, thus affecting the accuracy and stability of the measurement results. Second, the external instrument design makes the entire system larger in size, inconvenient to carry and use. Third, existing digital display tire pressure guns cannot detect the air pressure inside an object without a gas source, which is a major limitation for some special application scenarios (such as field rescue). Finally, the pressure sensor range of existing digital display tire pressure guns is usually small, and it is prone to overload problems, thus affecting the accuracy of the measurement results. Content of the Utility Model

[0005] The purpose of the utility model is to provide a digital display tire pressure gun sensing device to solve the problems existing in the above background technique.

[0006] To achieve the above purpose, it is realized through the following technical solutions:

[0007] A digital display tire pressure gun sensing device, including a main body, the main body is an integrated structure composed of a front end part and a handle part, the front end part is connected with a front cover to form a front end accommodation cavity, the handle part is a cavity structure and is communicated with the front end accommodation cavity, an air inlet joint is connected with the handle part and is communicated with the cavity structure, a pressure sensor assembly is arranged in the front end accommodation cavity, a charging tube assembly is installed at the front end part of the main body and is communicated with the front end accommodation cavity, a battery slot is arranged at the front end part of the main body, a battery is installed in the battery slot, the battery is electrically connected with the pressure sensor assembly by wires, a liquid crystal display screen is arranged on the front cover, and the liquid crystal display screen is electrically connected with the pressure sensor assembly by wires.

[0008] Further, on the side of the handle part close to the front end part, there are two pressure relief component accommodation cavities and switch component accommodation cavities which are communicated with the cavity structure of the handle part and are perpendicular to each other. The pressure relief component is arranged in the pressure relief component accommodation cavity, and the switch component is arranged in the switch component accommodation cavity.

[0009] Further, the switch component includes a trigger, a rubber gasket, a closing and opening pin, a closing and opening pin spring, a closing and opening pin nut, a valve rod, a valve seat and a first bushing; the closing and opening pin nut is threadedly connected to the left side of the switch component accommodation cavity, a closing and opening pin spring abuts against the closing and opening pin nut and the left end of the closing and opening pin respectively, two first bushings are respectively arranged in the switch component accommodation cavity, the rubber gasket is sleeved on the closing and opening pin, another closing and opening pin spring is sleeved on the left side of the valve rod, and the left end of the valve rod abuts against the right end of the closing and opening pin. The right end of the valve rod passes through the valve seat, and the valve seat is threadedly connected to the right side of the switch component accommodation cavity. The trigger is rotatably connected to the main body through a trigger pin, and the trigger abuts against the right end of the valve rod.

[0010] Further, the pressure relief component includes a second bushing, a valve rod spring, a deflation valve, a deflation valve seat and a button. The second bushing is arranged in the pressure relief component accommodation cavity, the deflation valve is slidably arranged in the second bushing, one end of the valve rod spring abuts against the right end of the pressure relief component accommodation cavity, and the other end abuts against the right end of the deflation valve. The deflation valve seat is threadedly connected to the left end of the pressure relief component accommodation cavity, the button is movably connected to the deflation valve seat, and the right end of the button abuts against the left end of the deflation valve.

[0011] Further, the pressure sensor assembly includes a circuit board fixing seat, a sensor circuit board, a main board and a backlight sheet. The circuit board fixing seat is installed in the front end accommodation cavity, the sensor circuit board is installed on the circuit board fixing seat, the main board is installed in the front end accommodation cavity, the main board is electrically connected with the sensor circuit board by wires, the battery is connected with the sensor circuit board by wires, the backlight sheet is installed on the main board, and the liquid crystal display screen is electrically connected with the main board by wires.

[0012] Further, a decorative face sticker is arranged on the outer side of the front cover, and a liquid crystal display screen opening is arranged on the decorative face sticker.

[0013] Further, a handle sheath is arranged on the outer side of the handle part.

[0014] Further, it includes a sheath which is arranged outside the front end portion.

[0015] Further, it also includes a lighting assembly which includes lamp beads, a lamp shade and a lamp base. The lamp base is installed on the side wall of the front end portion, the lamp beads are installed on the lamp base and are connected to the battery wire, and the lamp shade is threadedly connected to the front end portion.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The digital display tire pressure gauge sensing device of the present application is completely integrated inside the tire pressure gauge, without external wires and connectors. Therefore, it has better shock resistance and drop resistance. This design can effectively avoid the influence of the external environment, such as vibration, humidity, etc., thereby improving the accuracy and stability of the measurement results.

[0018] 2. The digital display tire pressure gauge sensing device of the present application is completely integrated inside the tire pressure gauge. Therefore, the volume of the entire system is small, which is convenient for carrying and using. In contrast, the existing external meter type digital display tire pressure gauge has a large volume and is inconvenient for carrying and using.

[0019] 3. The digital display tire pressure gauge of the present application can detect the air pressure inside an object without an air source. This is an important advantage for some special application scenarios (such as field rescue). However, the existing external meter type digital display tire pressure gauge cannot detect the air pressure inside an object without an air source.

[0020] 4. The pressure sensor of the digital display tire pressure gauge of the present application has a large measurement range, and there is theoretically no overload problem, thereby improving the accuracy of the measurement results.

[0021] 5. The digital display tire pressure gauge of the present application provides multiple unit options such as Bar, MPa, Psi, etc., and users can quickly switch according to their needs. This improves the convenience of use.

[0022] 6. The measurement of the digital display tire pressure gauge of the present application is more accurate because its air flow always passes through the air pressure sensor, and it is close to the object to be inflated with a large passage, and far from the air source with a small passage. The liquid crystal screen dynamically feeds back data that is closer to the actual air pressure of the object to be inflated, avoiding damage caused by excessive pressure.

[0023] Generally speaking, the digital display tire pressure gauge sensing device of the present application is superior to the existing external meter type digital display tire pressure gauge in many aspects, with higher accuracy, better shock and drop resistance performance, a larger measurement range, more unit options, and higher portability. Description of the Drawings

[0024] Figure 1 It is an exploded view of the digital display tire pressure gauge sensing device of the present utility model.

[0025] Description of the reference numerals:

[0026] 1. Body; 2. Handle sheath; 3. Rubber gasket; 4. Opening and closing pin; 5. Opening and closing pin spring; 6. O-ring; 7. Opening and closing pin nut; 8. Valve stem; 9. O-ring; 10. Valve seat; 11. Valve stem spring; 12. Bleeder valve; 13. O-ring; 14. Bleeder valve seat; 15. Exhaust button; 16. O-ring; 17. Circuit board fixing seat; 18. O-ring; 19. Screw; 20. Sensor circuit board; 21. Main board; 22. Backlight sheet; 23. LCD screen; 24. Conductive rubber; 25. Front cover; 26. Decorative sticker; 27. Lamp bead; 28. Lamp holder; 29. Lamp shade; 30. Positive electrode reed; 31. Negative electrode reed; 32. Battery cover; 33. Sheath; 34. O-ring; 35. Inlet joint; 36. American external thread insert core; 37. Trigger; 38. Trigger gasket; 39. Trigger nut; 40. Trigger pin; 41. Third bushing; 42. First bushing; 43. Inflatable tube assembly; 44. Second bushing. Detailed implementation manners

[0027] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solutions of the present utility model, rather than being construed as a limitation to the technical solutions of the present utility model.

[0028] As Figure 1 shown, the present application provides a digital display tire pressure gun sensing device, and its main components include a high-pressure air source, a valve mechanism, an air inlet pipeline, a pressure sensor assembly, an inflatable tube assembly, an exhaust mechanism, an LCD screen, a switch assembly, etc.

[0029] Specifically, the digital display tire pressure gun sensing device of the present application includes a body 1. The body 1 of the present application is made of plastic material to achieve overall lightness, or the body can also be prepared from metal material according to the use environment. The body is a shell structure, an integral structure composed of a front end part and a handle part. If plastic material is used, it can be injection molded at one time to improve airtightness. The shape of the front end part of the present application is not specifically limited and can be circular or other shapes. The overall shape is an uncovered box structure. An inward groove is provided at the bottom of the front end part to form a battery slot. A positive electrode reed 30, a negative electrode reed 31, and a battery are arranged in the battery slot. The electrode reeds are connected to other electrical parts through wires and are powered by the battery. The structures of the battery and the electrode reeds are conventional technologies in the art, and those skilled in the art are all clear that all structures capable of accommodating and powering the battery are applicable to the technical solutions of the present application.

[0030] In this application, the front end portion and the front cover 25 together form a front accommodation cavity, and the air pressure sensor assembly is fixedly arranged in the front accommodation cavity. The handle portion of this application is also a cavity structure for the user to hold. At a position of the rear handle portion close to the front end portion, there are provided two pressure relief component accommodation cavities and switch component accommodation cavities that communicate with the cavity structure of the handle portion and are perpendicular to each other. In other embodiments of this application, the pressure relief component accommodation cavity and the switch component accommodation cavity may not be perpendicular to the cavity structure of the handle portion. One end of the pressure relief component accommodation cavity is closed, and the other end is provided with internal threads. Both ends of the switch component accommodation cavity are open and are provided with internal threads at both ends. The pressure relief component is arranged in the pressure relief component accommodation cavity, and the switch component is arranged in the switch component accommodation cavity.

[0031] At each connection part of this application, in order to ensure gas tightness, O-rings or sealing rings are provided. Since using O-ring sealing is not only a conventional means in this field but also a conventional means in current mechanical, electrical and other fields, therefore, in the technical solution of this application, the sealing components are not described, but it does not mean that the device does not use sealing components.

[0032] An air inlet joint 35 is connected by threads to the lower end of the cavity structure of the handle portion. The American external thread insert core 36 is connected to the air inlet joint 35, and the other end is connected to the air source pipeline.

[0033] The switch component of this application is a conventional component of current pneumatic tools. In the technical solution of this application, there is no improvement to the switch component. Here, only a brief description of the switch component is given. Those skilled in the art can choose any existing switch component structure according to needs as long as it can achieve the function of opening and closing the air source in this application. The switch component includes a trigger 37, a rubber gasket 3, a closing and opening pin 4, a closing and opening pin spring 5, a closing and opening pin nut 7, a valve rod 8, a valve seat 10 and a first bushing 42. The closing and opening pin nut 7 is threadedly connected to the left side of the switch component accommodation cavity. One of the closing and opening pin springs abuts against the closing and opening pin nut and the left end of the closing and opening pin respectively. Two first bushings 42 are respectively arranged in the switch component accommodation cavity. The rubber gasket 3 is sleeved on the closing and opening pin 4. The other closing and opening pin spring is sleeved on the left side of the valve rod, and the left end of the valve rod 8 abuts against the right end of the closing and opening pin 4. The right end of the valve rod 8 passes through the valve seat 10, and the valve seat 10 is threadedly connected to the right side of the switch component accommodation cavity. The trigger 37 is rotatably connected to the body 1 through a trigger pin 40, and the trigger 37 abuts against the right end of the valve rod 8. The above connection relationships of the switch component are all prior arts.

[0034] The pressure relief component of the present application includes a second bushing 44, a valve stem spring 11, a bleed valve 12, a bleed valve seat 14, and an exhaust button 15. The second bushing 44 is disposed in the pressure relief component accommodation cavity. The bleed valve 12 is slidably disposed in the second bushing 44. One end of the valve stem spring 11 abuts against the right end of the pressure relief component accommodation cavity, and the other end abuts against the right end of the bleed valve 12. The bleed valve seat 14 is threadedly connected to the left end of the pressure relief component accommodation cavity. The exhaust button 15 is movably connected to the bleed valve seat 14. The right end of the exhaust button 15 abuts against the left end of the bleed valve 12. The function of the pressure relief component is that if the air pressure value is too high, by pressing the exhaust button 15 briefly, the excess air is discharged through components such as the bleed valve until the number displayed on the liquid crystal screen 23 meets the requirements.

[0035] In the present application, the air pressure sensor component includes a circuit board fixing seat 17, a sensor circuit board 20, a main board 21, and a backlight sheet 22. The circuit board fixing seat 17 is installed in the front end accommodation cavity. The sensor circuit board 20 is installed on the circuit board fixing seat 17. The main board 21 is installed in the front end accommodation cavity. The main board 21 is electrically connected to the sensor circuit board 20 by wires. The battery is connected to the sensor circuit board 20 by wires. The backlight sheet 22 is installed on the main board 21. The liquid crystal screen 23 is electrically connected to the main board 21 by wires.

[0036] In the present application, a decorative sticker 26 is provided on the outer side of the front cover 25, and a liquid crystal screen opening is provided on the decorative sticker 26.

[0037] In the present application, a handle sheath 2 is provided on the outer side of the handle portion to increase the friction and improve the use comfort.

[0038] In the present application, a sheath 33 is included, and the sheath 33 is disposed on the outer side of the front end portion.

[0039] In the present application, a lighting component is further included. The lighting component includes a lamp bead 27, a lamp cover 29, and a lamp seat 28. The lamp seat 28 is installed on the side wall of the front end portion. The lamp bead 27 is installed on the lamp seat 28 and is electrically connected to the battery by wires. The lamp cover 29 is threadedly connected to the front end portion.

[0040] The working principle is as follows:

[0041] After the compressed air is connected to the American-style male plug, the air enters the body through the air inlet joint and is blocked by the valve mechanism of the rubber gasket 3, the opening and closing pin 4, the opening and closing pin spring 5, the O-ring 6 and other parts. After pressing the trigger, the opening and closing pin assembly composed of the opening and closing pin spring 5, the O-ring 6, the valve stem 8, the O-ring 9 and other parts moves downward, and at the same time pushes the valve mechanism to open, the air intake pipeline is connected, and the compressed air flows into the inflated object connected to the air nozzle on the inflatable tube assembly through the air pressure sensor assembly and the inflation tube assembly composed of the O-ring 16, the circuit board fixing seat 17, the O-ring 18, the sensor circuit board 20 and other parts. After releasing the trigger, the opening and closing pin spring and the valve stem spring push the relevant parts to reset, the air intake pipeline is closed, and the air intake is terminated. However, the air inside the inflated object is still connected to the air pressure sensor assembly. At this time, the value displayed on the LCD screen is the internal air pressure of the inflated object. If the air pressure value does not meet the requirements, press the trigger again to allow more air to enter the inflated object. If the air pressure value is too high, short press the exhaust button to exhaust the excess air through the exhaust mechanism composed of the deflation valve 12, O-ring 13, deflation valve seat 14 and other parts until the digital display on the LCD screen 23 is consistent. During inflation, the air flow always passes through the air pressure sensor, and the distance to the inflated object is close and the passage is large, and the distance to the air source is far and the passage is small. The dynamic feedback data of the LCD screen is closer to the actual air pressure of the inflated object, avoiding damage caused by excessive pressure. The tire pressure gun equipped with a digital tire pressure gun sensor system can not only inflate and exhaust, but also detect the internal air pressure of the object without an air source. Compared with the external instrument tire pressure gun, the measurement is more accurate and the reading is easier. Because the sensor system is inside the tire pressure gun, it is more shock-resistant and fall-proof, effectively avoiding damage caused by falling. The pressure sensor range is larger than that of the mechanical pressure gauge, and there is no overload problem in theory. The system also provides a variety of unit options such as Bar, MPa, Psi, etc., which can be quickly switched by pressing the button below the LCD screen.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A digital display tire pressure gauge sensing device, characterized in that, It includes a main body which is an integral structure composed of a front end part and a handle part. The front end part is connected to a front cover to form a front end accommodation cavity. The handle part is a cavity structure and is communicated with the front end accommodation cavity. An air inlet joint is connected to the handle part and is communicated with the cavity structure. A pressure sensor assembly is arranged in the front end accommodation cavity. An air charging tube assembly is installed on the front end part of the main body and is communicated with the front end accommodation cavity. A battery slot is arranged on the front end part of the main body, and a battery is installed in the battery slot. The battery is electrically connected to the pressure sensor assembly by wires. A liquid crystal display screen is arranged on the front cover, and the liquid crystal display screen is electrically connected to the pressure sensor assembly by wires.

2. The digital display tire pressure gauge sensing device according to claim 1, characterized in that On the side of the handle part close to the front end part, there are two pressure relief component accommodation cavities and switch component accommodation cavities which are communicated with the cavity structure of the handle part and are perpendicular to each other. A pressure relief component is arranged in the pressure relief component accommodation cavity, and a switch component is arranged in the switch component accommodation cavity.

3. The digital display tire pressure gauge sensing device according to claim 2, characterized in that, The switch component includes a trigger, a rubber gasket, a closing and opening pin, a closing and opening pin spring, a closing and opening pin nut, a valve rod, a valve seat and a first bushing. The closing and opening pin nut is threadedly connected to the left side of the switch component accommodation cavity. A closing and opening pin spring abuts against the closing and opening pin nut and the left end of the closing and opening pin respectively. Two first bushings are respectively arranged in the switch component accommodation cavity. The rubber gasket is sleeved on the closing and opening pin. Another closing and opening pin spring is sleeved on the left side of the valve rod, and the left end of the valve rod abuts against the right end of the closing and opening pin. The right end of the valve rod passes through the valve seat, and the valve seat is threadedly connected to the right side of the switch component accommodation cavity. The trigger is rotatably connected to the main body through a trigger pin, and the trigger abuts against the right end of the valve rod.

4. The digital display tire pressure gauge sensing device according to claim 2, characterized in that, The pressure relief component includes a second bushing, a valve rod spring, a gas release valve, a gas release valve seat and a button. The second bushing is arranged in the pressure relief component accommodation cavity. The gas release valve is slidably arranged in the second bushing. One end of the valve rod spring abuts against the right end of the pressure relief component accommodation cavity, and the other end abuts against the right end of the gas release valve. The gas release valve seat is threadedly connected to the left end of the pressure relief component accommodation cavity. The button is movably connected to the gas release valve seat, and the right end of the button abuts against the left end of the gas release valve.

5. The digital display tire pressure gun sensing device according to claim 1, characterized in that The pressure sensor assembly includes a circuit board fixing seat, a sensor circuit board, a main board and a backlight sheet. The circuit board fixing seat is installed in the front end accommodation cavity. The sensor circuit board is installed on the circuit board fixing seat. The main board is installed in the front end accommodation cavity. The main board is electrically connected to the sensor circuit board by wires. The battery is electrically connected to the sensor circuit board by wires. The backlight sheet is installed on the main board, and the liquid crystal display screen is electrically connected to the main board by wires.

6. The digital display tire pressure gauge sensing device according to claim 5, wherein On the outer side of the front cover, there is a decorative sticker, and a liquid crystal display screen opening is arranged on the decorative sticker.

7. The digital display tire pressure gauge sensing device according to claim 1, characterized in that, On the outer side of the handle part, there is a handle sheath.

8. The digital display tire pressure gauge sensing device according to claim 1, characterized in that, It includes a sheath which is arranged on the outer side of the front end part.

9. The digital display tire pressure gauge sensing device according to claim 1, wherein It further includes a lighting component which includes a lamp bead, a lamp shade and a lamp holder. The lamp holder is installed on the side wall of the front end part. The lamp bead is installed on the lamp holder and is electrically connected to the battery. The lamp shade is threadedly connected to the front end part.

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