Bluetooth inflation gun system for automobile

Abstract

According to the Bluetooth inflation gun system for the automobile, a Bluetooth inflation gun is in radio connection with a tire pressure display screen, a user does not need to check tire pressure information through wired electric connection or an additional interface any more, and therefore using convenience is greatly improved. According to the scheme, the four operation keys on the operation panel correspond to the four tires of the vehicle respectively, a user can send tire pressure information of the specific tires to the tire pressure display screen through simple key operation, and the tire pressure display screen is provided with four display devices, so that the user can know the overall tire pressure condition of the vehicle clearly at a glance; data of four tires do not need to be recorded respectively, operation is simpler, and user experience can be improved; and each tire is provided with a corresponding operation key, so that the user is not easy to confuse or operate mistakenly. Besides, the tire pressure display screen adopts a modular design, and the bottom shell, the mounting frame, the front cover and the four display devices are respectively mounted on different connecting circuit boards, so that each component can be independently mounted and replaced, and the maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the field of inflation, in particular to a Bluetooth inflation gun system for a car. Background Art

[0002] A car air gun is a tool used to inflate car tires, also commonly known as an air pump or inflator. It can be powered by electricity or manually operated to provide compressed air to replenish the tire pressure.

[0003] At present, users of traditional car air guns need to manually measure the tire pressure of each tire separately. It takes four actions to detect four tires and record four data to check the air pressure of all tires separately. The operation process is cumbersome and not conducive to improving efficiency. In addition, some traditional air guns usually do not have a display screen or have limited display functions. Users cannot intuitively see the air pressure data of the four tires of the car at one time and can only rely on manual measurement and recording.

[0004] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content

[0005] The utility model overcomes the shortcomings of the above-mentioned technology and provides a Bluetooth air-filling gun system for a car.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A Bluetooth air gun system for a car, comprising a Bluetooth air gun 100 and a tire pressure display screen 200 capable of Bluetooth pairing with the Bluetooth air gun 100, wherein the Bluetooth air gun 100 is provided with an operation panel 101, wherein the operation panel 101 is provided with four operation buttons and a display screen 12, wherein the four operation buttons are: a first operation button 111 for sending the tire pressure of the left front tire, a second operation button 112 for sending the tire pressure of the right front tire, a third operation button 113 for sending the tire pressure of the left rear tire, and a fourth operation button 114 for sending the tire pressure of the right rear tire. 14; The tire pressure display screen 200 includes: a bottom shell 21, a mounting frame 22, and a front cover 23 which are connected and installed in sequence. The bottom shell 21 is electrically connected with four connecting circuit boards and a Bluetooth receiving board 24 for Bluetooth pairing with the Bluetooth inflation gun 100 and receiving tire pressure information so that the tire pressure information is displayed on the display device. The four connecting circuit boards are respectively provided with a first display device 25 for displaying the tire pressure of the left front tire, a second display device 26 for displaying the tire pressure of the right front tire, a third display device 27 for displaying the tire pressure of the left rear tire, and a fourth display device 28 for displaying the tire pressure of the right rear tire.

[0008] Preferably, the Bluetooth inflation gun 100 is provided with a first power supply module 13, a pressure detection module 14, a Bluetooth transmission module 15, a first single-chip computer module 16, and a button module 11 electrically connected to four operation buttons, the display screen 12 is provided with a backlight circuit 121, the first power supply module 13 supplies power to the entire Bluetooth inflation gun 100, and the first single-chip computer module 16 is electrically connected to the pressure detection module 14, the Bluetooth transmission module 15, the button module 11, and the backlight circuit 121, respectively.

[0009] Preferably, the Bluetooth inflator gun 100 is also provided with a voltage detection module 17 and a charging module 18, the output end of the voltage detection module 17 is electrically connected to the first single-chip computer module 16, the output end of the first single-chip computer module 16 is electrically connected to the charging module 18, and the voltage output end of the charging module 18 is electrically connected to the first power supply module 13.

[0010] Preferably, the first power supply module 13 includes: a battery 131, a low-voltage difference linear regulator U3 with a chip model of H7533 electrically connected to the battery 131 and its peripheral circuits; the pressure detection module 14 adopts a tire pressure sensor chip; the Bluetooth transmission module 15 includes a Bluetooth chip U2 and its peripheral circuits; the first single-chip computer module 16 includes a single-chip computer chip U1 and its peripheral circuits; the backlight circuit 121 includes: a first backlight sub-circuit 1211 for lighting a green light when the tire pressure data of the Bluetooth inflation gun 100 is successfully sent, and a second backlight sub-circuit 1212 for turning on the white backlight in the default power-on state, and the single-chip computer chip U1 is provided with a first control terminal T1 electrically connected to the first backlight sub-circuit 1211, and a second control terminal T2 electrically connected to the second backlight sub-circuit 1212.

[0011] Preferably, the voltage detection module 17 includes: a first resistor R8, a second resistor R9, and a first capacitor C19, one end of the first resistor R8 is electrically connected to the voltage output end of the first power supply module 13, and the other end is electrically connected to the detection end T3BAT DAC of the single-chip microcomputer chip U1 as the output end of the voltage detection module 17, one end of the second resistor R9 is electrically connected to the other end of the first resistor R8, and the other end is grounded, and the first capacitor C19 is electrically connected to both ends of the second resistor R9;

[0012] The charging module 18 includes: a TYPE-C charging interface 181, a charging management chip U4 of model HX4054, an electrical connector 182 electrically connected between the positive and negative poles of the battery 131, and a peripheral circuit. The CHRG terminal of the charging management chip U4 is electrically connected to the detection control terminal T4 of the microcontroller chip U1, the GND terminal is grounded, the BAT terminal is electrically connected to the positive pole of the battery 131, the VCC terminal is electrically connected to the TYPE-C charging interface 181 through the peripheral circuit, and the PROG terminal is grounded.

[0013] Preferably, the Bluetooth receiving board 24 includes: a second power supply module 241 for powering the tire pressure display screen 200, a Bluetooth receiving module 242 for receiving tire pressure information sent by the Bluetooth inflation gun 100, a display driver module 243, and a second single-chip computer module 244, wherein the second single-chip computer module 244 is electrically connected to the Bluetooth receiving module 242 and the display driver module 243, respectively, and the display driver module 243 is electrically connected to the first display device 25, the second display device 26, the third display device 27, and the fourth display device 28, respectively.

[0014] Preferably, the second power supply module 241 includes: a Schottky diode D11, a third resistor R69, a TVS diode D12 of model SMBJ12CA, a first polarity capacitor C109, a second capacitor C110, a low voltage difference linear regulator U11 of chip model HT7533, a third capacitor C112, and a second polarity capacitor C111. The positive electrode of the Schottky diode D11 serves as the power supply voltage output end of the second power supply module 241, and the negative electrode is electrically connected to one end of the third resistor R69. The other end of the third resistor R69 is respectively electrically connected to one end of the TVS diode D12 and the positive electrode of the external power supply voltage. The other end of the TVS diode D12 is grounded. The positive electrode of the first polarity capacitor C109 is electrically connected to the positive electrode of the external power supply voltage, and the negative electrode is grounded. The second capacitor C110 is electrically connected in parallel with the first polarity capacitor C109. The GND pin of the low voltage difference linear regulator U11 is grounded, and the Vi The n pin is electrically connected to the positive pole of the external power supply voltage, and the Vout pin serves as the chip voltage output terminal. The positive pole of the second polarity capacitor C111 is electrically connected to the chip voltage output terminal, and the negative pole is grounded. The third capacitor C112 is electrically connected in parallel with the second polarity capacitor C111.

[0015] Preferably, the Bluetooth receiving module 242 includes: a Bluetooth receiving chip M1 and its peripheral circuits electrically connected to the second single-chip computer module 244;

[0016] The display driving module 243 includes: a display driving circuit 2431, a control circuit 2432, and an interface circuit 2433. The display driving circuit 2431 is electrically connected to the second single-chip computer module 244. The control circuit 2432 is electrically connected between the display driving circuit 2431 and the interface circuit 2433, and part of the interface of the interface circuit 2433 is electrically connected to the second single-chip computer module 244.

[0017] The display driving circuit 2431 includes: an LED driving chip U24 of model TM1640 and its peripheral circuits; the interface circuit 2433 includes: a first electrical connector 24331 electrically connected to the first display device 25, a second electrical connector 24332 electrically connected to the second display device 26, a third electrical connector 24333 electrically connected to the third display device 27, and a fourth electrical connector 24334 electrically connected to the fourth display device 28;

[0018] The second single-chip microcomputer module 244 includes a single-chip microcomputer chip U12 and its peripheral circuits.

[0019] Preferably, the first display device 25, the second display device 26, the third display device 27, and the fourth display device 28 are all digital tubes, and the control circuit 2432 is used to transmit the signal generated by the display driving circuit 2431 to each segment of the digital tube and to adjust the on and off state of each segment of the digital tube. The control circuit 2432 includes a plurality of control sub-circuits electrically connected to each segment of the digital tube respectively.

[0020] Preferably, the installation frame 22 is provided with a shielding portion 221 in the shape of a crossbar capable of accommodating four display devices.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. This application uses a wireless connection between a Bluetooth inflation gun and a tire pressure display screen. Users no longer need a wired electrical connection or an additional interface to view tire pressure information, which greatly enhances the convenience of use. Moreover, the four operating buttons on the operating panel of this case correspond to the four tires of the vehicle respectively. Users can send the tire pressure information of a specific tire to the tire pressure display screen through simple button operations. In addition, the tire pressure display screen is provided with four display devices, so that users can grasp the overall tire pressure of the vehicle at a glance. There is no need to record the data of the four tires separately, which makes the operation simpler and helps to improve the user experience. Moreover, since each tire has a corresponding operating button, users are not easily confused or operate incorrectly. In addition, the tire pressure display screen of this case adopts a modular design. The bottom shell, mounting frame, front cover and four display devices are respectively installed on different connection circuit boards, so that each component can be independently installed and replaced, which is convenient for maintenance.

[0023] 2. In this case, the second power supply module incorporates a Schottky diode D11 and a TVS diode D12 to effectively prevent transient overvoltage and reverse voltage of the power supply voltage, thus protecting the subsequent circuits from power fluctuations. The parallel use of the first polarized capacitor C109 and the second capacitor C110 provides a good filtering effect for the power supply circuit, effectively reducing the impact of power supply noise on the operation of the tire pressure display screen. The low dropout linear regulator U11 in this case uses a chip with the model number HT7533, which features low dropout, high efficiency, low noise, and a stable output voltage. The parallel use of the second polarized capacitor C111 and the third capacitor C112 further enhances the filtering effect on the one hand, and on the other hand, can reduce the impact on circuit components in case of circuit abnormalities, improving the reliability of the entire power supply module.

[0024] 3. In this case, by providing a cross-shaped shielding portion on the mounting frame that can avoid four display devices, it can avoid the four display devices and at the same time shield other electronic devices, playing a certain protective role and making the layout of the entire tire pressure display screen more compact. The provision of the power input socket enables the tire pressure display screen to be conveniently connected to an external power supply, ensuring continuous power supply for the device. The addition of the power switch allows users to easily control the on / off state of the device, which is not only convenient for daily use but also helps with energy conservation and extends the device's lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the operation panel of the Bluetooth inflator gun in this case.

[0026] Figure 2 is an exploded structural diagram of the tire pressure display screen in this case.

[0027] Figure 3 is a block diagram of the circuit system of the Bluetooth inflator gun in this case.

[0028] Figure 4 is a schematic circuit diagram of the first power supply module in this case.

[0029] Figure 5 is a schematic circuit diagram of the pressure detection module in this case.

[0030] Figure 6 is a schematic circuit diagram of the Bluetooth transmission module in this case.

[0031] Figure 7 is a schematic circuit diagram of the button module in this case.

[0032] Figure 8 is a schematic circuit diagram of the first single-chip microcomputer module in this case.

[0033] Fig. 9 is a schematic circuit diagram of the backlight circuit in this case.

[0034] Fig.10 This is the circuit schematic diagram of the voltage detection module in this case.

[0035] Fig.11 It is the circuit schematic diagram of the charging module in this case.

[0036] Fig.12 This is the circuit system block diagram of the entire Bluetooth inflatable gun system in this case.

[0037] Fig.13 This is the circuit schematic diagram of the second power supply module in this case.

[0038] Fig.14 This is the circuit schematic diagram of the Bluetooth receiving module in this case.

[0039] Fig.15 This is the circuit schematic diagram of the second single-chip microcomputer module in this case.

[0040] Fig.16 It is the circuit schematic diagram of the display driving circuit in this case.

[0041] Fig.17 This is the circuit schematic diagram of the control circuit in this case.

[0042] Fig.18 This is the circuit schematic diagram of the interface circuit in this case.

[0043] Figure 19-1 It is the circuit schematic diagram of the first display device in this case.

[0044] Figure 19-2 It is the circuit schematic diagram of the second display device in this case.

[0045] Figure 20-1 It is the circuit schematic diagram of the third display device in this case.

[0046] Figure 20-2 It is a circuit schematic diagram of the fourth display device in this case. DETAILED DESCRIPTION

[0047] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0048] like Figure 1 to Figure 20, a Bluetooth air gun system for a car includes a Bluetooth air gun 100 and a tire pressure display screen 200 that can be paired with the Bluetooth air gun 100 by Bluetooth, wherein the Bluetooth air gun 100 is provided with an operation panel 101, and the operation panel 101 is provided with four operation buttons and a display screen 12, wherein the four operation buttons are: a first operation button 111 for sending the tire pressure of the left front tire, a second operation button 112 for sending the tire pressure of the right front tire, a third operation button 113 for sending the tire pressure of the left rear tire, and a fourth operation button 114 for sending the tire pressure of the right rear tire. Key 114; the tire pressure display screen 200 includes: a bottom shell 21, a mounting frame 22, and a front cover 23 which are connected and installed in sequence. The bottom shell 21 is electrically connected with four connection circuit boards and a Bluetooth receiving board 24 for Bluetooth pairing with the Bluetooth inflation gun 100 and receiving tire pressure information so that the tire pressure information is displayed on the display device. The four connection circuit boards are respectively provided with a first display device 25 for displaying the tire pressure of the left front tire, a second display device 26 for displaying the tire pressure of the right front tire, a third display device 27 for displaying the tire pressure of the left rear tire, and a fourth display device 28 for displaying the tire pressure of the right rear tire. The four connection circuit boards are respectively: a first connection circuit board 291 arranged at the left front position of the bottom shell 21, a second connection circuit board 292 arranged at the right front position of the bottom shell 21, a third connection circuit board 293 arranged at the left rear position of the bottom shell 21, and a fourth connection circuit board 294 arranged at the right rear position of the bottom shell 21.

[0049] As described above, the present application uses a wireless connection between a Bluetooth inflation gun and a tire pressure display screen, so users no longer need a wired electrical connection or an additional interface to view tire pressure information, thereby greatly enhancing the convenience of use. The four operating buttons on the operating panel of this case correspond to the four tires of the vehicle respectively. The user can send the tire pressure information of a specific tire to the tire pressure display screen through simple button operation, and the tire pressure display screen is provided with four display devices, so that the user can grasp the overall tire pressure of the vehicle at a glance, without having to record the data of the four tires separately, which makes the operation simpler and helps to improve the user experience; and because each tire has a corresponding operating button, the user is not easily confused or misoperated. In addition, the tire pressure display screen of this case adopts a modular design, and the bottom shell, mounting frame, front cover and four display devices are respectively installed on different connection circuit boards, so that each component can be independently installed and replaced, which is convenient for maintenance.

[0050] like Figure 3As shown, in a specific implementation, the Bluetooth inflation gun 100 is provided with a first power supply module 13, a pressure detection module 14, a Bluetooth transmission module 15, a first single-chip computer module 16, and a key module 11 electrically connected to four operation keys, the display screen 12 is provided with a backlight circuit 121, the first power supply module 13 supplies power to the entire Bluetooth inflation gun 100, and the first single-chip computer module 16 is electrically connected to the pressure detection module 14, the Bluetooth transmission module 15, the key module 11, and the backlight circuit 121, respectively.

[0051] As described above, the first power supply module 13 is set to ensure the stable power supply of the Bluetooth air gun, so that it can work normally in various working environments. The pressure detection module 14 is set to detect the tire pressure of the tire in real time, and transmit the data to the first single-chip module 16 for processing, so as to ensure the accuracy and real-time nature of the tire pressure information. The Bluetooth transmitter module 15 is set so that the air gun has the function of Bluetooth transmission, and can send the tire pressure data to the tire pressure display screen 200 in real time for the user to view, which is more convenient to use. The first single-chip module 16 is set to receive and process data from each module, control the Bluetooth transmitter module 15 to send tire pressure information, and control the working state of the charging module 18 according to the data of the voltage detection module 17, so as to realize the intelligent control of the system. The voltage detection module 17 is set to monitor the voltage state of the power supply module in real time. Once the voltage is too low or too high, the charging module 18 can be controlled by the first single-chip module 16 to charge or take other protective measures, thereby avoiding equipment damage or safety accidents caused by abnormal voltage. The configuration of the charging module 18 allows the Bluetooth inflator gun to be charged by an external power source without frequent battery replacement, thereby improving the convenience of use. The backlight circuit 121 on the display screen 12 allows the subsequent charging gun to display different light effects according to different states.

[0052] like Figure 4 As shown, in a specific implementation, the first power supply module 13 includes: a battery 131, a low-voltage dropout linear regulator U3 with a chip model of H7533 electrically connected to the battery 131, and its peripheral circuits. In this way, the H7533 low-voltage dropout linear regulator U3 can provide a stable output voltage, effectively filter out the noise and fluctuations in the output of the battery 131, and ensure that each module in the Bluetooth inflatable gun 100 can obtain a stable power supply. Moreover, the low-voltage dropout linear regulator U3 with a model of H7533 has the characteristics of low power consumption, which is conducive to extending the service life of the battery.

[0053] like Figure 5As shown, the pressure detection module 14 uses a tire pressure sensor chip; specifically, a tire pressure sensor detection chip of model number SP400-11-01 can be used. In this way, the tire pressure sensor chip can achieve high-precision tire pressure measurement and accurately convert the pressure change inside the tire into an electrical signal output.

[0054] like Figure 8 and Fig. 9 As shown, the Bluetooth transmitter module 15 includes: a Bluetooth chip U2 and its peripheral circuits; the first single-chip module 16 includes a single-chip chip U1 and its peripheral circuits, and the single-chip chip U1 can be a single-chip chip of the model STM32F103C8T6, which has the advantages of high performance and low power consumption. The backlight circuit 121 includes: a first backlight subcircuit 1211 for lighting a green light when the tire pressure data of the Bluetooth inflatable gun 100 is successfully sent, and a second backlight subcircuit 1212 for turning on the white backlight in the default power-on state, and the single-chip chip U1 is provided with a first control terminal T1 electrically connected to the first backlight subcircuit 1211, and a second control terminal T2 electrically connected to the second backlight subcircuit 1212. In this way, the Bluetooth chip U2 and its peripheral circuits of the Bluetooth transmitter module 15 ensure that the Bluetooth inflatable gun can stably and quickly communicate wirelessly with other devices. The single-chip microcomputer chip U1 and its peripheral circuits in the first single-chip microcomputer module 16 provide powerful control and processing capabilities for the entire system. The single-chip microcomputer chip U1 can efficiently process tire pressure data, control data transmission of the Bluetooth transmitter module, and interact with the backlight circuit. The design of the backlight circuit 121 adds a humanized operating experience to the Bluetooth inflator. When the first backlight sub-circuit 1211 lights up green when the tire pressure data is successfully sent, it provides intuitive feedback to the user; the second backlight sub-circuit 1212 turns on the white backlight in the default power-on state to ensure that the display screen is clearly visible in any environment.

[0055] like Fig.10As shown, in the specific implementation, the voltage detection module 17 includes: a first resistor R8, a second resistor R9, and a first capacitor C19, one end of the first resistor R8 is electrically connected to the voltage output end of the first power supply module 13, and the other end is electrically connected to the detection end T3 of the single-chip microcomputer chip U1 as the output end of the voltage detection module 17, one end of the second resistor R9 is electrically connected to the other end of the first resistor R8, and the other end is grounded, and the first capacitor C19 is electrically connected to the two ends of the second resistor R9. In this way, the first resistor R8 and the second resistor R9 of the voltage detection module 17 form a voltage divider circuit, which can reduce the high voltage output by the first power supply module 13 to a range that the single-chip microcomputer chip U1 can safely receive, so that the single-chip microcomputer chip U1 can accurately read the voltage value through its detection end T3 without being damaged by excessive voltage. The first capacitor C19 is connected in parallel to the two ends of the second resistor R9, which plays a filtering role, so that the voltage signal received by the single-chip microcomputer chip U1 is more stable and reliable, and the stability and measurement accuracy of the system are improved.

[0056] like Fig.11 As shown, in specific implementation, the charging module 18 includes: a TYPE-C charging interface 181, a charging management chip U4 of model HX4054, an electrical connector 182 electrically connected between the positive and negative electrodes of the battery 131, and a peripheral circuit. The CHRG terminal of the charging management chip U4 is electrically connected to the detection control terminal T4 of the single-chip chip U1, the GND terminal is grounded, the BAT terminal is electrically connected to the positive electrode of the battery 131, the VCC terminal is electrically connected to the TYPE-C charging interface 181 through the peripheral circuit, and the PROG terminal is grounded. In specific implementation, the battery voltage of this case is 3.7V, the cut-off voltage is 3.2V, the full charge voltage is 4.2V, and the charging voltage is 5V.

[0057] As mentioned above, the use of the TYPE-C charging interface 181 in this case makes the charging process more convenient and efficient. By adopting the charging management chip U4 with model HX4054, the charging gun in this case has functions such as thermal feedback, charging voltage setting, and charging current regulation to ensure the safety and stability of the charging process, so as to automatically adjust the charging current according to the charging status and ambient temperature to prevent the chip from overheating. The charging voltage is set to 4.2V, and the charging current can be set by an external resistor to meet the charging requirements of different devices. The electrical connector 182 is electrically connected between the positive and negative poles of the battery 131 to ensure that the charging current can flow into the battery stably and safely.

[0058] like Fig.12As shown, the Bluetooth receiving board 24 includes: a second power supply module 241 for powering the tire pressure display screen 200, a Bluetooth receiving module 242 for receiving tire pressure information sent by the Bluetooth inflation gun 100, a display driver module 243, and a second single-chip computer module 244. The second single-chip computer module 244 is electrically connected to the Bluetooth receiving module 242 and the display driver module 243, respectively, and the display driver module 243 is electrically connected to the first display device 25, the second display device 26, the third display device 27, and the fourth display device 28, respectively.

[0059] As described above, the Bluetooth receiving board 24 of this case includes a second power supply module 241, a Bluetooth receiving module 242, a display driver module 243 and a second single-chip microcomputer module 244, so that the receiving board integrates multiple functions of power supply, Bluetooth reception, display driver and single-chip microcomputer control, which makes the entire tire pressure display system more compact and efficient on the one hand, and reduces the connection and wiring between components through integration, reducing the complexity and failure rate of the system. Moreover, the setting of the Bluetooth receiving module 242 can quickly and accurately receive the tire pressure information sent from the Bluetooth inflation gun 100. In addition, this case can realize the real-time display of the first display device 25, the second display device 26, the third display device 27, and the fourth display device 28 through the electrical connection between the second single-chip microcomputer module 244 and the display driver module 243, thereby improving the readability of the information and the user experience. In actual use, when new tire pressure data is received again, the data can be refreshed in real time. If the same tire position sends data multiple times, only the data of the corresponding position is refreshed.

[0060] like Fig.13 As shown, in a specific implementation, the second power supply module 241 includes: a Schottky diode D11, a third resistor R69, a TVS diode D12 of model SMBJ12CA, a first polarity capacitor C109, a second capacitor C110, a low voltage difference linear regulator U11 of chip model HT7533, a third capacitor C112, and a second polarity capacitor C111. The positive electrode of the Schottky diode D11 serves as the power supply voltage output end of the second power supply module 241, and the negative electrode is electrically connected to one end of the third resistor R69. The other end of the third resistor R69 is electrically connected to one end of the TVS diode D12 and the positive electrode of the external power supply voltage, respectively. The other end of the TVS diode D12 is grounded. The positive electrode of the first polarity capacitor C109 is electrically connected to the positive electrode of the external power supply voltage, and the negative electrode is grounded. The second capacitor C110 is electrically connected in parallel with the first polarity capacitor C109. The GND pin of the low voltage difference linear regulator U11 is grounded, and the Vi The n pin is electrically connected to the positive pole of the external power supply voltage, and the Vout pin serves as the chip voltage output terminal. The positive pole of the second polarity capacitor C111 is electrically connected to the chip voltage output terminal, and the negative pole is grounded. The third capacitor C112 is electrically connected in parallel with the second polarity capacitor C111.

[0061] As described above, the second power supply module 241 of this case introduces Schottky diode D11 and TVS diode D12 to effectively prevent transient overvoltage and reverse voltage of the power supply voltage, thereby protecting the subsequent circuit from the influence of power supply fluctuations. By using the first polarity capacitor C109 and the second capacitor C110 in parallel, a good filtering effect is provided for the power supply circuit, and the influence of power supply noise on the operation of the tire pressure display screen 200 is effectively reduced. The low-voltage difference linear regulator U11 of this case adopts a chip model HT7533, so as to have the characteristics of low voltage difference, high efficiency, low noise and stable output voltage. The parallel use of the second polarity capacitor C111 and the third capacitor C112, on the one hand, further enhances the filtering effect, and on the other hand, can reduce the impact on the circuit components when the circuit is abnormal, thereby improving the reliability of the entire power supply module.

[0062] like Fig.14 As shown, the Bluetooth receiving module 242 includes: a Bluetooth receiving chip M1 and its peripheral circuits electrically connected to the second single-chip microcomputer module 244; Fig.12 As shown, the display driver module 243 includes: a display driver circuit 2431, a control circuit 2432, and an interface circuit 2433. The display driver circuit 2431 is electrically connected to the second single-chip module 244. The control circuit 2432 is electrically connected between the display driver circuit 2431 and the interface circuit 2433, and part of the interface of the interface circuit 2433 is electrically connected to the second single-chip module 244. Fig.16 As shown, the display driving circuit 2431 includes: a LED driving chip U24 of model TM1640 and its peripheral circuits. Fig.18 As shown, the interface circuit 2433 includes: a first electrical connector 24331 electrically connected to the first display device 25, a second electrical connector 24332 electrically connected to the second display device 26, a third electrical connector 24333 electrically connected to the third display device 27, and a fourth electrical connector 24334 electrically connected to the fourth display device 28. Fig.15 As shown, the second single-chip module 244 includes a single-chip chip U12 and its peripheral circuits, and specifically can adopt a single-chip chip of model STM32F103C8T6. As shown in Figures 19 and 20, the circuit principle diagrams of four display devices are shown.

[0063] As described above, in this case, the Bluetooth receiving module 242 adopts a Bluetooth receiving chip M1 and its peripheral circuit that are electrically connected to the second single-chip microcomputer module 244, ensuring the stability and efficiency of Bluetooth communication. The display driving module 243 of this case realizes precise control of multiple display devices through the combination of the display driving circuit 2431, the control circuit 2432, and the interface circuit 2433. The display driving circuit 2431 of this case adopts the setting of an LED driving chip U24 with the model number TM1640, providing strong driving capabilities, enabling the display device to clearly and accurately display tire pressure information. Moreover, through the design of the interface circuit 2433, multiple display devices can be conveniently connected.

[0064] As Figure 18 to Figure 20-2 shown, the first display device 25, the second display device 26, the third display device 27, and the fourth display device 28 are all digital tubes. The control circuit 2432 is used to transmit the signals generated by the display driving circuit 2431 to each segment of the digital tube and to adjust the on / off states of each segment of the digital tube. The control circuit 2432 includes multiple control sub-circuits that are respectively electrically connected to the ABCDEFG segments of the digital tube. In this way, the digital tube, as a common display device, has the characteristics of clear and intuitive display. Each digital tube can independently display numbers or characters, enabling the tire pressure information to be presented at a glance. The control circuit is independently designed according to each digital tube so that the signals generated by the display driving circuit can be accurately transmitted to each segment of the digital tube, and the on / off states of each segment of the digital tube can be precisely adjusted through the control sub-circuits.

[0065] As Figure 2 shown, the mounting frame 22 is provided with a cross-shaped shielding portion 221 that can avoid the four display devices. The tire pressure display screen 200 is provided with a power input socket and a power switch that are electrically connected to an external power supply. In this way, by providing a cross-shaped shielding portion 221 on the mounting frame 22 that can avoid the four display devices, it can avoid the four display devices and at the same time shield the other electronic devices, playing a certain protective role and making the layout of the entire tire pressure display screen 200 more compact. The setting of the power input socket enables the tire pressure display screen 200 to be conveniently connected to an external power supply, ensuring the continuous power supply of the device. The addition of the power switch enables the user to easily control the on / off state of the device, which is convenient for daily use and helps to save energy and extend the service life of the device.

[0066] As described above, the display screen 12 is an LCD display screen, and the LCD display screen is also divided into a Bluetooth icon display area, a pressure unit display area (PSI, BAR, and KPa can be switched), a power display area, and a car icon display area.

[0067] The working process of the entire Bluetooth inflator gun system is as follows:

[0068] The Bluetooth air-filling gun is powered on by pressing any key and enters the standby state. When there is no pressure, the middle LCD display shows 0.00 BAR and the display 12 is brightly lit with white backlight. Bluetooth pairing will be performed during the first use. At this time, the LCD Bluetooth icon flashes and Bluetooth pairing is entered. If there is no action for 20 seconds, Bluetooth pairing will be turned off. At the same time, the tire pressure display screen is powered on by turning on its power switch (27), and the Bluetooth air-filling gun that has been successfully paired will be automatically connected.

[0069] After the Bluetooth air gun and the tire pressure display screen are successfully matched, the four tires in the car icon display area on the left side of the LCD display screen respectively represent the four tires to be measured. When all tires have not sent data, all tires flash; after the pressure is measured by the pressure detection module (14), when the user presses the corresponding button to successfully send data, the tires at the corresponding position stop flashing, indicating that the measurement has been completed; after the transmission is successful, the LCD backlight will switch from white light to green light for 2 seconds and then switch back to white light, indicating that the data has been successfully sent. (i.e. flashing green light) For the other tire positions that have not sent data, the corresponding position of the LCD display continues to flash, indicating the state to be tested; repeat the above measurement steps, test the remaining 3 tires respectively, press the corresponding operation button each time to send data to the Bluetooth receiving board of the tire pressure display screen through the Bluetooth transmitter module, and the Bluetooth receiving board of the tire pressure display screen will display the corresponding digital tube after receiving the data; when all 4 tires are successfully sent, the 4 tires displayed on the LCD stop flashing, indicating that the detection of one car has been completed; when all 4 tires are successfully sent, the display screen displays the air pressure of 4 tires, indicating that the detection of one car has been completed; at this time, the four display devices (i.e. digital tubes) of the tire pressure display screen fully display the tire pressure of the four tires of the car. Afterwards, when the data is successfully sent again, the data will be refreshed. If the same tire position sends data multiple times, only the data of the corresponding position will be refreshed.

[0070] As mentioned above, this case protects a Bluetooth air-filling gun system for automobiles, and all technical solutions that are identical or similar to this case should be deemed to fall within the scope of protection of this case.

Claims

1. A Bluetooth inflator system for a car, characterized in that The invention comprises a Bluetooth air-filling gun (100) and a tire pressure display screen (200) capable of Bluetooth pairing with the Bluetooth air-filling gun (100), wherein the Bluetooth air-filling gun (100) is provided with an operation panel (101), wherein the operation panel (101) is provided with four operation buttons and a display screen (12), wherein the four operation buttons are: a first operation button (111) for sending the tire pressure of the left front tire, a second operation button (112) for sending the tire pressure of the right front tire, a third operation button (113) for sending the tire pressure of the left rear tire, and a fourth operation button (114) for sending the tire pressure of the right rear tire; and the tire pressure display screen (12) is provided with an operation panel (101) on the Bluetooth air-filling gun (100). The display screen (200) comprises: a bottom shell (21), a mounting frame (22), and a front cover (23) which are connected and installed in sequence. The bottom shell (21) is electrically connected to four connection circuit boards and a Bluetooth receiving board (24) for Bluetooth pairing with a Bluetooth inflation gun (100) and receiving tire pressure information so that the tire pressure information is displayed on the display device. The four connection circuit boards are respectively provided with a first display device (25) for displaying the tire pressure of the left front tire, a second display device (26) for displaying the tire pressure of the right front tire, a third display device (27) for displaying the tire pressure of the left rear tire, and a fourth display device (28) for displaying the tire pressure of the right rear tire.

2. A Bluetooth inflator gun system for a car according to claim 1, characterized in that: The Bluetooth air-filling gun (100) is provided with a first power supply module (13), a pressure detection module (14), a Bluetooth transmission module (15), a first single-chip microcomputer module (16), and a key module (11) electrically connected to four operation keys; the display screen (12) is provided with a backlight circuit (121); the first power supply module (13) supplies power to the entire Bluetooth air-filling gun (100); and the first single-chip microcomputer module (16) is electrically connected to the pressure detection module (14), the Bluetooth transmission module (15), the key module (11), and the backlight circuit (121), respectively.

3. A Bluetooth inflator gun system for a car according to claim 2, characterized in that: The Bluetooth inflatable gun (100) is also provided with a voltage detection module (17) and a charging module (18); the output end of the voltage detection module (17) is electrically connected to the first single-chip computer module (16); the output end of the first single-chip computer module (16) is electrically connected to the charging module (18); and the voltage output end of the charging module (18) is electrically connected to the first power supply module (13).

4. A Bluetooth inflator gun system for a car according to claim 3, characterized in that The first power supply module (13) comprises: a battery (131), a low-voltage difference linear regulator U3 with a chip model of H7533 electrically connected to the battery (131), and its peripheral circuits; the pressure detection module (14) adopts a tire pressure sensor chip; the Bluetooth transmission module (15) comprises a Bluetooth chip U2 and its peripheral circuits; the first single-chip computer module (16) comprises a single-chip computer chip U1 and its peripheral circuits; the backlight circuit (121) comprises: a first backlight subcircuit (1211) for lighting a green light when tire pressure data of the Bluetooth inflation gun (100) is successfully sent, and a second backlight subcircuit (1212) for turning on a white backlight in a default power-on state; the single-chip computer chip U1 is provided with a first control terminal (T1) electrically connected to the first backlight subcircuit (1211), and a second control terminal (T2) electrically connected to the second backlight subcircuit (1212).

5. A Bluetooth inflator gun system for a car according to claim 4, characterized in that The voltage detection module (17) comprises: a first resistor R8, a second resistor R9, and a first capacitor C19; one end of the first resistor R8 is electrically connected to the voltage output end of the first power supply module (13), and the other end is electrically connected to the detection end (T3) of the single-chip microcomputer chip U1 as the output end of the voltage detection module (17); one end of the second resistor R9 is electrically connected to the other end of the first resistor R8, and the other end is grounded; and the first capacitor C19 is electrically connected to both ends of the second resistor R9; The charging module (18) comprises: a TYPE-C charging interface (181), a charging management chip (U4) of model HX4054, an electrical connector (182) electrically connected between the positive and negative electrodes of the battery (131), and a peripheral circuit, wherein the CHRG terminal of the charging management chip (U4) is electrically connected to the detection control terminal (T4) of the single-chip microcomputer chip U1, the GND terminal is grounded, the BAT terminal is electrically connected to the positive electrode of the battery (131), the VCC terminal is electrically connected to the TYPE-C charging interface (181) through the peripheral circuit, and the PROG terminal is grounded.

6. A Bluetooth inflator gun system for a car according to claim 1, characterized in that The Bluetooth receiving board (24) comprises: a second power supply module (241) for supplying power to a tire pressure display screen (200), a Bluetooth receiving module (242) for receiving tire pressure information sent by a Bluetooth inflation gun (100), a display driver module (243), and a second single-chip computer module (244); the second single-chip computer module (244) is electrically connected to the Bluetooth receiving module (242) and the display driver module (243), respectively; and the display driver module (243) is electrically connected to a first display device (25), a second display device (26), a third display device (27), and a fourth display device (28), respectively.

7. A Bluetooth inflator system for a car according to claim 6, characterized in that The second power supply module (241) comprises: a Schottky diode D11, a third resistor R69, a TVS diode D12 of model SMBJ12CA, a first polarity capacitor C109, a second capacitor C110, a low voltage difference linear regulator U11 of chip model HT7533, a third capacitor C112, and a second polarity capacitor C111, wherein the positive electrode of the Schottky diode D11 serves as the power supply voltage output terminal of the second power supply module (241), the negative electrode is electrically connected to one end of the third resistor R69, and the other end of the third resistor R69 is respectively connected to one end of the TVS diode D12 and an external The positive electrode of the external power supply voltage is electrically connected, the other end of the TVS diode D12 is grounded, the positive electrode of the first polarity capacitor C109 is electrically connected to the positive electrode of the external power supply voltage, and the negative electrode is grounded, the second capacitor C110 is electrically connected in parallel with the first polarity capacitor C109, the GND pin of the low voltage difference linear regulator U11 is grounded, the Vin pin is electrically connected to the positive electrode of the external power supply voltage, and the Vout pin serves as the chip voltage output terminal, the positive electrode of the second polarity capacitor C111 is electrically connected to the chip voltage output terminal, and the negative electrode is grounded, and the third capacitor C112 is electrically connected in parallel with the second polarity capacitor C111.

8. A Bluetooth inflator gun system for a car according to claim 6 or 7, characterized in that The Bluetooth receiving module (242) comprises: a Bluetooth receiving chip M1 electrically connected to the second single-chip computer module (244) and its peripheral circuits; The display driving module (243) comprises: a display driving circuit (2431), a control circuit (2432), and an interface circuit (2433); the display driving circuit (2431) is electrically connected to the second single-chip computer module (244); the control circuit (2432) is electrically connected between the display driving circuit (2431) and the interface circuit (2433); and part of the interface of the interface circuit (2433) is electrically connected to the second single-chip computer module (244); The display drive circuit (2431) comprises: an LED drive chip U24 of model TM1640 and its peripheral circuits; the interface circuit (2433) comprises: a first electrical connector (24331) electrically connected to a first display device (25), a second electrical connector (24332) electrically connected to a second display device (26), a third electrical connector (24333) electrically connected to a third display device (27), and a fourth electrical connector (24334) electrically connected to a fourth display device (28); The second single-chip computer module (244) comprises a single-chip computer chip U12 and its peripheral circuits.

9. A Bluetooth inflator gun system for a car according to claim 8, characterized in that The first display device (25), the second display device (26), the third display device (27), and the fourth display device (28) are all digital tubes. The control circuit (2432) is used to transmit the signal generated by the display driving circuit (2431) to each segment of the digital tube and to adjust the on and off state of each segment of the digital tube. The control circuit (2432) includes a plurality of control subcircuits electrically connected to each segment of the digital tube.

10. A Bluetooth inflator gun system for a car according to claim 1, characterized in that The installation frame (22) is provided with a shielding portion (221) in a cross shape that can avoid four display devices.

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