Wireless access display device

Abstract

The utility model relates to a wireless access display device, which is used for displaying host data at a far end and comprises host end equipment and external display end equipment, the host end equipment comprises a wireless transmitting device, and the external display end equipment comprises a wireless receiving device, external display information processing equipment, external display driving equipment and external display equipment which are connected in sequence; and wireless connection is established between the host end equipment and the external display end equipment, so that data, needing to be externally displayed, of the host end equipment is displayed on the external display end equipment. The external display end equipment adopts a wireless connection mode, can provide a long-distance display function, and can be placed as required, so that the flexibility and convenience of equipment movement are improved; the wireless connection mode avoids the situation of unstable data transmission caused by the loosening or poor connection of a wired cable, provides a more convenient and reliable remote display solution for a user, meets the display requirements under different requirements and scenes, and improves the user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of money counting machines, in particular to a wireless access display device. Background Art

[0002] At present, many modern money counters are equipped with wired display technology to facilitate users to monitor the operation and results of the money counter in real time. These wired display technologies provide a more convenient and efficient way to display information such as money counter detection results, statistics, etc.

[0003] Wired external display technology displays the test results and data of the money counter on external devices such as computers and display screens through wired connections, realizing real-time monitoring and data display. The external display device is usually connected to the money counter through interfaces such as USB and HDMI, and data interaction and control are realized through specially designed software or applications. Wired external display technology provides a simple and intuitive external display interface to display the test results, alarm information, statistical data and other contents of the money counter. The external display device usually has a clear display screen or interface that can display a variety of information, such as the amount of money counted, color identification of the test results, error prompts, etc.

[0004] Although wired external display technology provides convenient real-time monitoring functions in the field of money counting machines, it still has the following disadvantages: First, it relies on wired connections. Wired external display technology needs to transmit data with external devices through wired connections such as USB and HDMI, which limits the flexibility and portability during use, and there are problems such as inconvenient cable layout; second, the wired connection method may be easily affected by problems such as poor cable connection and looseness, resulting in unstable or interrupted data transmission, affecting the effect of real-time monitoring. Utility Model Content

[0005] In view of this, it is necessary to provide a display device with wireless access that is easy to move and has a simple structure.

[0006] A wireless access display device is used for remotely displaying host data, comprising a host-side device and an external display-side device, wherein the host-side device comprises a wireless transmitting device, and the external display-side device comprises a wireless receiving device, an external display information processing device, an external display driving device and an external display device connected in sequence; the wireless transmitting device and the wireless receiving device can establish a wireless connection between the host-side device and the external display-side device, so that the data of the host-side device that needs to be displayed externally can be displayed on the external display-side device; the external display information processing device of the external display-side device is used to transmit the data that needs to be displayed externally received by the wireless receiving device to the external display driving device, and the data is displayed externally by the external display device.

[0007] Preferably, the host-end device also includes a DB9 interface J1, and the DB9 interface J1 is used to connect the wireless transmitting device with the host device. The wireless transmitting device includes a Bluetooth transmitting chip U1, and the ANT pin of the Bluetooth transmitting chip U1 is connected to the transmitting antenna. The wireless receiving device includes a Bluetooth receiving chip U3, and the ANT pin of the Bluetooth receiving chip U3 is connected to the receiving antenna. A wireless connection is established between the Bluetooth transmitting chip U1 and the Bluetooth receiving chip U3, and data to be displayed externally is transmitted; the external display information processing device includes an information processing chip U17, and the output end of the Bluetooth receiving chip U3 is connected to the input end of the information processing chip U17. The received data signal to be displayed externally is processed by the information processing chip U17 and transmitted to the external display device.

[0008] Preferably, the sending pin TX of the DB9 interface J1 is connected to the receiving pin UART-TX of the Bluetooth transmitting chip U1 through the second resistor R2 and the eighth resistor R8 connected in series, and the midpoint of the second resistor R2 and the eighth resistor R8 is grounded through the fifth resistor R5; the receiving pin RX of the DB9 interface J1 is connected to the sending pin UART-RX of the Bluetooth transmitting chip U1 through the first resistor R1 and the ninth resistor R9 connected in series, and the midpoint of the first resistor R1 and the ninth resistor R9 is grounded through the sixth resistor R6; the DCS pin of the DB9 interface J1 is connected to the initialization pin RST of the Bluetooth transmitting chip U1 through the third resistor R3 and the twelfth resistor R12 connected in series, and the midpoint of the third resistor R3 and the twelfth resistor R12 is grounded through the fourth resistor R4; the initialization pin RST of the Bluetooth transmitting chip U1 is connected to the 3.3V power supply through the thirteenth resistor R13 and is grounded through the first capacitor C1;

[0009] The transmitting pin TX, the receiving pin RX and the DCS pin of the DB9 interface J1 are respectively connected to the first transient voltage suppression tube DZ1, the ninth transient voltage suppression tube DZ9 and the second transient voltage suppression tube DZ2 to suppress transient overvoltage or spike voltage.

[0010] Preferably, the host-end device also includes a Bluetooth transmitter power module, which includes a first DCDC power chip U2, the power input terminal VIN of the first DCDC power chip U2 is connected to a 5V power supply through a first magnetic bead inductor L1, the midpoint of the first magnetic bead inductor L1 and the VIN pin is grounded through a first thirty-first capacitor C31 and a second hundred and twenty-fifth capacitor C225 connected in parallel, and the midpoint of the first magnetic bead inductor L1 and the 5V power supply is grounded through a second capacitor C2 and a second transient voltage suppression tube TVS2 connected in parallel; an enable pin EN of the first DCDC power chip U2 is connected to the power input terminal VIN through a fifteenth resistor R15; the output voltage of the voltage output pin VOUT of the first DCDC power chip U2 is 3.3V, and the voltage output pin VOUT of the first DCDC power chip U2 is grounded through a twenty-fourth capacitor C24 and a twenty-first capacitor C21 connected in parallel.

[0011] Preferably, the serial data interface RX / TX of the Bluetooth receiving chip U3 is connected to the serial data pin UART2-TX / UART2-RX of the information processing chip U17 through the thirty-ninth capacitor R39 and the fortieth resistor R40, respectively, and the serial data interface RX / TX of the Bluetooth receiving chip U3 is also connected to the 3.3V power supply through the eighty-fourth resistor R84 and the eighty-fifth resistor R85, respectively;

[0012] The initialization pin RST of the Bluetooth receiving chip U3 is connected to the reset pin HC08U-IO1 of the information processing chip U17 through the twenty-second resistor R22. The midpoint between the twenty-second resistor R22 and the initialization pin RST is grounded through the seventeenth capacitor C17 and connected to the 3.3V power supply through the twenty-seventh resistor R27.

[0013] Preferably, the XIN pin and XOUT pin of the information processing chip U17 are connected to an external crystal oscillator, the crystal oscillator is used to provide a clock signal for the information processing chip U17, and the XIN pin and XOUT pin are grounded through the sixth capacitor C6 and the fifth capacitor C5 respectively;

[0014] The PB15-MOSI2 pin of the information processing chip U17 is connected to the cathode of the eighth light emitting diode D8 through the sixteenth resistor F16, and the anode of the eighth light emitting diode D8 is connected to the 3.3V power supply;

[0015] The JTMS / SWDIO pin of the information processing chip U17 is connected to the third pin of the SWD debugging interface P1 through a sixty-third resistor R63, the JTCK / SWCLK pin of the information processing chip U17 is connected to the second pin of the SWD debugging interface P1 through a sixty-fourth resistor R64, and the M3-NRST pin of the information processing chip U17 is connected to the first pin of the SWD debugging interface P1 through a sixty-second resistor R62;

[0016] The fifth pin of the SWD debugging interface P1 is connected to a 3.3V power supply through a sixty-fifth resistor R65, the third pin of the SWD debugging interface P1 is connected to a 3.3V power supply through a fifty-second resistor R52, and the fourth pin of the SWD debugging interface P1 is grounded;

[0017] The M3-PA10-RXD1 pin of the information processing chip U17 is connected to the first pin of the test interface J10 through the tenth diode D10 and the one hundred and fifth resistor R105 connected in series, the anode of the tenth diode D10 is connected to the 3.3V power supply through the one hundred and fourth resistor R104, and the cathode of the tenth diode D10 is connected to the one hundred and fifth resistor R105; the M3-PA9TXD1 pin of the information processing chip U17 is connected to the second pin of the test interface J10 through the one hundred and sixth resistor R106;

[0018] The MCU-SDAT pin, the MCU-CLK pin and the MCU-CS pin of the information processing chip U17 are connected to the input end of the external display driving device.

[0019] Preferably, the external display driving device comprises an LED driving chip U2, and a signal input end of the LED driving chip U2 is connected to the external display information processing device;

[0020] The data input pin DIN of the LED driver chip U2 is connected to the MCU-SDAT pin of the information processing chip U17 through the one hundred and third resistor R103, and is also connected to the 5V power supply through the thirty-eighth resistor R38; the clock input pin SCLK of the LED driver chip U2 is connected to the MCU-CLK pin of the information processing chip U17 through the one hundred and second resistor R102, and is also connected to the 5V power supply through the thirty-seventh resistor R37; the chip select pin STB of the LED driver chip U2 is connected to the MCU-CS pin of the information processing chip U17 through the one hundred and first resistor R101, and is also connected to the 5V power supply through the twenty-eighth resistor R28;

[0021] The SEG1-SEG8 pins and the GRID1-GRID16 pins of the LED driver chip U2 are connected to the external display device.

[0022] Preferably, the external display device includes a plurality of display modules, and the A / B / C / D / E / F / G / DP pins of each of the display modules are respectively connected to the SEG1~SEG8 pins of the LED driver chip U2; each of the display modules includes a plurality of display units, and each display unit has a bit selection port, and the bit selection port of each display unit is connected to one of the GRID1~GRID16 pins of the LED driver chip U2;

[0023] A sixty-first resistor R61 and a ninth light emitting diode LED9 connected in series are connected between the SEG8 pin and the GRID8 pin of the LED driver chip U2.

[0024] Preferably, the external display terminal device also includes a receiving end power supply module, the receiving end power supply module includes an external power input circuit, a battery charging circuit, an automatic power supply switching circuit and a Bluetooth receiving end power supply module, the external power input circuit is used to connect an external power supply, the external power input circuit is electrically connected to the battery charging circuit, the automatic power supply switching circuit is used to switch between external power supply and battery power supply, and the Bluetooth receiving end power supply module is used to power the wireless receiving device; the receiving end power supply module is used to provide working power for the external display terminal device.

[0025] Preferably, the external power input circuit includes an external power input interface J2, the VBUS pin of the external power input interface J2 is connected to the battery charging circuit through a sixty-eighth resistor R68 after passing through a fuse F1, the midpoint of the fuse F1 and the sixty-eighth resistor R68 is grounded through a first electrolytic capacitor EC1 and a nineteenth capacitor C19 connected in parallel, the midpoint of the fuse F1 and the sixty-eighth resistor R68 is also grounded through a twenty-third resistor R23 and a twenty-fourth resistor R24 ​​connected in series, the midpoint of the twenty-third resistor R23 and the twenty-fourth resistor R24 ​​is connected to the DC5V-ADC-IN5 pin of the information processing chip U17 through a twenty-fifth resistor R25 to detect the external power supply; the twenty-fourth resistor R24 ​​is connected to both ends in parallel with a thirty-seventh capacitor C37;

[0026] The battery charging circuit includes a charging chip U6, a charging indication pin CHRG of the charging chip U6 is connected to a START-CHARGE pin of the information processing chip U17 through a twenty-sixth resistor R26, and a charging completion pin STDBY of the charging chip U6 is connected to a CHARGE-COMPLETE pin of the information processing chip U17 through a twenty-first resistor R21; a charging indication pin CHRG of the charging chip U6 is connected to a sixty-eighth resistor R68 of the external power input circuit through an eighteenth light-emitting diode D18 and a one-hundred-twelfth resistor R112 connected in series, and a charging completion pin STDBY of the charging chip U6 is connected to a sixty-eighth resistor R68 of the external power input circuit through a sixteenth light-emitting diode D16 and a one-hundred-seventh resistor R107 connected in series; a battery temperature detection pin TEMP of the charging chip U6 is connected to a charging battery through a sixty-ninth resistor R69, and is connected to the external power input circuit through a sixty-sixth resistor R66, and is grounded through a ninety-fourth resistor R94;

[0027] The automatic power supply switching circuit includes a third PMOS tube Q3 and a fourth PMOS tube Q4. The gate of the third PMOS tube Q3 is grounded through a seventieth resistor R70 and a ninety-fifth resistor R95 connected in series. The midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to an external power supply VCC-IN. The drain of the third PMOS tube Q3 is connected to a rechargeable battery. The drain of the third PMOS tube Q3 is also grounded through a ninety-ninth resistor R99 and a ninety-seventh resistor R97 connected in series. The midpoint of the ninety-ninth resistor R99 and the ninety-seventh resistor R97 is connected to the BT-ADC-IN6 pin of the information processing chip U17 to detect the battery voltage. The two ends of the ninety-seventh resistor R97 are connected in parallel with a forty-first capacitor C41. A seventeenth Schottky diode is connected between the drain and source of the third PMOS tube Q3. The third PMOS tube D17, the source of the third PMOS tube Q3 is connected to the source of the fourth PMOS tube Q4, the midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to the source of the fourth PMOS tube Q4 through the fourteenth Schottky diode D14; the gate of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the forty-sixth resistor R46, the source of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the ninety-sixth resistor R96, the second pin of the key switch KEY1 is grounded, and the forty-seventh resistor R47 and the ninth capacitor C9 are connected in parallel between the first pin and the second pin of the key switch KEY1; the drain of the fourth PMOS tube Q4 is connected to the rechargeable battery, and the drain of the fourth PMOS tube Q4 is grounded through the second electrolytic capacitor EC2 and the fortieth capacitor C40 connected in parallel.

[0028] The Bluetooth receiving end power module includes a second DCDC power chip U5, a VIN pin of the second DCDC power chip U5 is connected to a 5V power supply and is grounded through a thirty-second capacitor C32 and a twenty-sixth capacitor C226 connected in parallel, an enable pin EN of the second DCDC power chip U5 is connected to the VIN pin of the second DCDC power chip U5 through a fifteenth resistor R15; a VOUT pin of the second DCDC power chip U5 is connected to a VCC pin of the Bluetooth receiving chip U3 through an eighteenth resistor R18, a midpoint between the eighteenth resistor R18 and the VOUT pin of the second DCDC power chip U5 is grounded through a twenty-eighth capacitor C28 and a seventh capacitor C7 connected in parallel, and a midpoint between the eighteenth resistor R18 and the VCC pin of the Bluetooth receiving chip U3 is grounded through a one-hundred-second capacitor C102 and a one-hundred-third capacitor C103 connected in parallel.

[0029] In the above-mentioned wireless access display device, the external display terminal device and the host terminal device adopt a wireless connection method, so that the external display terminal device can be placed as needed, which improves the flexibility and convenience of device movement, and can provide a long-distance display function as needed; the wireless connection method avoids the unstable data transmission caused by loose wired cables or poor connections, and provides users with a more convenient and reliable remote display solution, meeting the display requirements under different needs and scenarios, and improving the user experience. The utility model has a simple structure, is easy to implement, has low cost, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a wireless access display device according to an embodiment of the utility model.

[0031] Figure 2 The present invention is a schematic diagram of the circuit structure of a wireless transmitter of a display device that is wirelessly connected to an embodiment of the present invention.

[0032] Figure 3 The circuit structure of the Bluetooth transmitter power module of the wireless access display device of the utility model embodiment is shown in FIG. Figure 1 .

[0033] Figure 4 The circuit structure of the Bluetooth transmitter power module of the wireless access display device of the utility model embodiment is shown in FIG. Figure 2 .

[0034] Figure 5 The circuit structure of the Bluetooth transmitter power module of the wireless access display device of the utility model embodiment is shown in FIG. Figure 3 .

[0035] Figure 6 It is a schematic diagram of the circuit structure of a wireless receiving device of a display device wirelessly accessed in an embodiment of the utility model.

[0036] Figure 7 It is a schematic diagram of the circuit structure of the external display information processing device of the display device with wireless access according to an embodiment of the utility model.

[0037] Figure 8 It is a circuit structure diagram of the SWD debugging interface of the external display information processing equipment of the display device wirelessly accessed by the embodiment of the utility model.

[0038] Fig. 9 The present invention is a schematic diagram of the circuit structure of a serial debugging interface of an external display information processing device of a display device with wireless access according to an embodiment of the present invention.

[0039] Fig.10 It is a schematic diagram of the circuit structure of the external display driving device of the wirelessly accessed display device according to an embodiment of the utility model.

[0040] Fig.11 It is a schematic diagram of the circuit structure of the ninth light emitting diode in the display module of the wireless access display device according to the embodiment of the utility model.

[0041] Fig.12 It is a schematic diagram of the circuit structure of a display module of a wirelessly accessed display device according to an embodiment of the utility model.

[0042] Fig.13 The present invention is a schematic diagram of the circuit structure of an external power input circuit of a wirelessly connected display device according to an embodiment of the present invention.

[0043] Fig.14 The present invention is a schematic diagram of the circuit structure of a battery charging circuit of a wirelessly connected display device according to an embodiment of the present invention.

[0044] Fig.15 The present invention is a schematic diagram of the circuit structure of the automatic power supply switching circuit of the wirelessly connected display device according to the embodiment of the present invention.

[0045] Fig.16 The utility model is a schematic diagram of the circuit structure of the Bluetooth receiving end power module of the wirelessly accessed display device according to the embodiment of the present utility model. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0047] See also Figure 1, showing a wireless access display device provided by an embodiment of the utility model, a wireless access display device, used for remotely displaying host data, including a host-side device and an external display-side device, the host-side device including a wireless transmitting device, the external display-side device including a wireless receiving device, an external display information processing device, an external display driving device and an external display device connected in sequence; the wireless transmitting device and the wireless receiving device can establish a wireless connection between the host-side device and the external display-side device, so that the data required for external display of the host-side device can be displayed on the external display-side device; the external display information processing device of the external display-side device is used to transmit the data required for external display received by the wireless receiving device to the external display driving device, and the external display device displays it externally.

[0048] Specifically, in the host-end device, the host transmits the data that needs to be displayed externally through the wireless transmitting device, and in the external display-end device, the wireless receiving device receives the data that needs to be displayed externally and transmits it to the external display information processing device. The external display information processing device transmits the received data that needs to be displayed externally to the external display device via the external display driving device and displays it externally.

[0049] Preferably, the host-end device also includes a DB9 interface J1, and the DB9 interface J1 is used to connect the wireless transmitting device with the host device. The wireless transmitting device includes a Bluetooth transmitting chip U1, and the ANT pin of the Bluetooth transmitting chip U1 is connected to the transmitting antenna. The wireless receiving device includes a Bluetooth receiving chip U3, and the ANT pin of the Bluetooth receiving chip U3 is connected to the receiving antenna. A wireless connection is established between the Bluetooth transmitting chip U1 and the Bluetooth receiving chip U3, and data to be displayed externally is transmitted; the external display information processing device includes an information processing chip U17, and the output end of the Bluetooth receiving chip U3 is connected to the input end of the information processing chip U17. The received data signal to be displayed externally is processed by the information processing chip U17 and transmitted to the external display device.

[0050] Preferably, see Figures 2 to 5, the sending pin TX of the DB9 interface J1 is connected to the receiving pin UART-TX of the Bluetooth transmitting chip U1 through the second resistor R2 and the eighth resistor R8 connected in series, and the midpoint of the second resistor R2 and the eighth resistor R8 is grounded through the fifth resistor R5; the receiving pin RX of the DB9 interface J1 is connected to the sending pin UART-RX of the Bluetooth transmitting chip U1 through the first resistor R1 and the ninth resistor R9 connected in series, and the midpoint of the first resistor R1 and the ninth resistor R9 is grounded through the sixth resistor R6; the DCS pin of the DB9 interface J1 is connected to the initialization pin RST of the Bluetooth transmitting chip U1 through the third resistor R3 and the twelfth resistor R12 connected in series, and the midpoint of the third resistor R3 and the twelfth resistor R12 is grounded through the fourth resistor R4; the initialization pin RST of the Bluetooth transmitting chip U1 is connected to the 3.3V power supply through the thirteenth resistor R13 and is grounded through the first capacitor C1.

[0051] The transmitting pin TX, the receiving pin RX and the DCS pin of the DB9 interface J1 are respectively connected to the first transient voltage suppression tube DZ1, the ninth transient voltage suppression tube DZ9 and the second transient voltage suppression tube DZ2 to suppress transient overvoltage or spike voltage.

[0052] Specifically, the DCS pin of the DB9 interface J1 is connected to the initialization pin RST of the Bluetooth transmitter chip U1, which is used for the reset function of the Bluetooth transmitter chip U1 to prevent the Bluetooth transmitter chip U1 from freezing during startup.

[0053] Preferably, the host-end device also includes a Bluetooth transmitter power module, which includes a first DCDC power chip U2, the power input terminal VIN of the first DCDC power chip U2 is connected to a 5V power supply through a first magnetic bead inductor L1, the midpoint of the first magnetic bead inductor L1 and the VIN pin is grounded through a first thirty-first capacitor C31 and a second hundred and twenty-fifth capacitor C225 connected in parallel, and the midpoint of the first magnetic bead inductor L1 and the 5V power supply is grounded through a second capacitor C2 and a second transient voltage suppression tube TVS2 connected in parallel; an enable pin EN of the first DCDC power chip U2 is connected to the power input terminal VIN through a fifteenth resistor R15; the output voltage of the voltage output pin VOUT of the first DCDC power chip U2 is 3.3V, and the voltage output pin VOUT of the first DCDC power chip U2 is grounded through a twenty-fourth capacitor C24 and a twenty-first capacitor C21 connected in parallel.

[0054] Specifically, the second transient voltage suppressor TVS2 is used for overvoltage protection of the first DCDC power chip U2, and the first magnetic bead inductor L1 is used to reduce noise and electromagnetic interference in the circuit to protect various components in the circuit from damage.

[0055] Specifically, the Bluetooth transmitter power module is used to provide working power for the wireless transmitter. The DB9 interface J1 is a DB9 serial communication interface socket, which is used to connect the host device and the wireless transmitter, and communicate with and power the wireless transmitter.

[0056] Specifically, the input voltage of the first DCDC power chip U2 is 3.9V-5.5V, and the output voltage is 3.3V, which supplies power to the Bluetooth transmitter chip U1.

[0057] Preferably, see Figure 6 The serial data interface RX / TX of the Bluetooth receiving chip U3 is connected to the serial data pin UART2-TX / UART2-RX of the information processing chip U17 through the thirty-ninth capacitor R39 and the fortieth resistor R40 respectively, and the serial data interface RX / TX of the Bluetooth receiving chip U3 is also connected to the 3.3V power supply through the eighty-fourth resistor R84 and the eighty-fifth resistor R85 respectively.

[0058] The initialization pin RST of the Bluetooth receiving chip U3 is connected to the HC08U-IO1 pin of the information processing chip U17 through the twenty-second resistor R22. The midpoint between the twenty-second resistor R22 and the initialization pin RST is grounded through the seventeenth capacitor C17 and connected to a 3.3V power supply through the twenty-seventh resistor R27.

[0059] Specifically, the reset pin HC08U-IO1 of the information processing chip U17 is used for the reset function of the chip.

[0060] Preferably, see Figure 7 The XIN pin and XOUT pin of the information processing chip U17 are connected to an external crystal oscillator, and the crystal oscillator is used to provide a clock signal for the information processing chip U17. The XIN pin and XOUT pin are grounded through the sixth capacitor C6 and the fifth capacitor C5 respectively.

[0061] The PB15-MOSI2 pin of the information processing chip U17 is connected to the cathode of the eighth light emitting diode D8 through the sixteenth resistor F16, and the anode of the eighth light emitting diode D8 is connected to a 3.3V power supply.

[0062] The JTMS / SWDIO pin of the information processing chip U17 is connected to the third pin of the SWD debugging interface P1 through the sixty-third resistor R63, the JTCK / SWCLK pin of the information processing chip U17 is connected to the second pin of the SWD debugging interface P1 through the sixty-fourth resistor R64, and the M3-NRST pin of the information processing chip U17 is connected to the first pin of the SWD debugging interface P1 through the sixty-second resistor R62.

[0063] See also Figure 8 The fifth pin of the SWD debugging interface P1 is connected to the 3.3V power supply through the sixty-fifth resistor R65, the third pin of the SWD debugging interface P1 is connected to the 3.3V power supply through the fifty-second resistor R52, and the fourth pin of the SWD debugging interface P1 is grounded.

[0064] See also Fig. 9 , the M3-PA10-RXD1 pin of the information processing chip U17 is connected to the first pin of the test interface J10 through the tenth diode D10 and the one-hundred-and-fifth resistor R105 connected in series, the anode of the tenth diode D10 is connected to the 3.3V power supply through the one-hundred-and-fourth resistor R104, and the cathode of the tenth diode D10 is connected to the one-hundred-and-fifth resistor R105; the M3-PA9TXD1 pin of the information processing chip U17 is connected to the second pin of the test interface J10 through the one-hundred-and-sixth resistor R106.

[0065] The MCU-SDAT pin, the MCU-CLK pin and the MCU-CS pin of the information processing chip U17 are connected to the input end of the external display driving device.

[0066] Specifically, the SWD debugging interface P1 is used for the debugging of the information processing chip U17, wherein the JTMS / SWDIO pin is a bidirectional data signal line of the simulation signal, which is used for the input and output of serial data; the JTCK / SWCLK pin is a clock signal line of the simulation signal, which is used for the input of the serial clock signal; the M3-NRST pin is a system reset signal line output to the information processing chip U17 for testing, which is used for chip reset.

[0067] Specifically, the test interface J10 is a debugging serial interface, which is used to output debugging information.

[0068] Specifically, the eighth light emitting diode D8 is a power indicator light of the information processing chip U17.

[0069] Preferably, see Fig.10 The external display driving device includes an LED driving chip U2, and the signal input end of the LED driving chip U2 is connected to the external display information processing device.

[0070] The data input pin DIN of the LED driver chip U2 is connected to the MCU-SDAT pin of the information processing chip U17 through the one-hundred-and-third resistor R103, and is also connected to the 5V power supply through the thirty-eighth resistor R38; the clock input pin SCLK of the LED driver chip U2 is connected to the MCU-CLK pin of the information processing chip U17 through the one-hundred-and-second resistor R102, and is also connected to the 5V power supply through the thirty-seventh resistor R37; the chip select pin STB of the LED driver chip U2 is connected to the MCU-CS pin of the information processing chip U17 through the one-hundred-and-first resistor R101, and is also connected to the 5V power supply through the twenty-eighth resistor R28.

[0071] The SEG1-SEG8 pins and the GRID1-GRID16 pins of the LED driver chip U2 are connected to the external display device.

[0072] Preferably, see Fig.12 The external display device includes multiple display modules, and the A / B / C / D / E / F / G / DP pins of each display module are respectively connected to the SEG1~SEG8 pins of the LED driver chip U2; each display module includes multiple display units, each display unit has a bit selection port, and the bit selection port of each display unit is connected to one of the GRID1~GRID16 pins of the LED driver chip U2.

[0073] A sixty-first resistor R61 and a ninth light emitting diode LED9 connected in series are connected between the SEG8 pin and the GRID8 pin of the LED driver chip U2.

[0074] Specifically, SEG1~8 pins are usually used to control the display of each segment in the digital tube. In a seven-segment digital tube, each digital tube usually has 7 segments, which represent different parts of the numbers or characters to be displayed, such as: A, B, C, D, E, F, G. The SEG8 pin can control one or more of the segments to display different numbers or characters.

[0075] GRID1~16 pins are usually used to control the anode or cathode of the digital tube, that is, the bit selection of the digital tube. In the case of multi-bit digital tubes, the GRID pin is used to select the specific digital tube to be controlled, thereby switching the display content between different digital tubes.

[0076] The digital tube is a common cathode. When GRID1~16 is high and SEG1~8 is low, it is effective and the corresponding point in the digital tube is lit.

[0077] Specifically, in this embodiment, the external display device includes four display modules, which are respectively used to display the total number of banknotes passed, the number of banknotes returned, and the upper four digits and lower four digits of the total amount. Each display module includes four display units, each display unit is used to display a number, and a total of 16 numbers can be displayed. The GRID1~GRID16 pins of the LED driver chip U2 are used to respectively select 16 display units, and the SEG1~SEG8 pins of the LED driver chip U2 correspond to the on and off state of each digital segment of each display unit, so that the LED driver chip U2 can drive the display state of all display units.

[0078] Specifically, see Fig.11 In this embodiment, the ninth light emitting diode LED9 is used to display suspicious coins when passing banknotes.

[0079] In this embodiment, the GRID8 pin is connected to the fourth digit in the returned banknote number display module, that is, the thousands digit in the returned banknote number, but the thousands digit is usually not used in the returned banknote number, so the GRID8 pin is used for the display control of the suspicious currency indicator light.

[0080] When there is a suspicious coin, the SEG8 pin outputs a PWM signal with a certain pulse width, and the GRID8 pin outputs a low level, so that the ninth light emitting diode LED9 flashes, indicating that there is a suspicious coin.

[0081] Preferably, the external display terminal device also includes a receiving end power supply module, the receiving end power supply module includes an external power input circuit, a battery charging circuit, an automatic power supply switching circuit and a Bluetooth receiving end power supply module, the external power input circuit is used to connect an external power supply, the external power input circuit is electrically connected to the battery charging circuit, the automatic power supply switching circuit is used to switch between external power supply and battery power supply, and the Bluetooth receiving end power supply module is used to power the wireless receiving device; the receiving end power supply module is used to provide working power for the external display terminal device.

[0082] Preferably, see Fig.13The external power input circuit includes an external power input interface J2, and the VBUS pin of the external power input interface J2 is connected to the battery charging circuit through a sixty-eighth resistor R68 after passing through a fuse F1. The midpoint of the fuse F1 and the sixty-eighth resistor R68 is grounded through a first electrolytic capacitor EC1 and a nineteenth capacitor C19 connected in parallel. The midpoint of the fuse F1 and the sixty-eighth resistor R68 is also grounded through a twenty-third resistor R23 and a twenty-fourth resistor R24 ​​connected in series. The midpoint of the twenty-third resistor R23 and the twenty-fourth resistor R24 ​​is connected to the DC5V-ADC-IN5 pin of the information processing chip U17 through a twenty-fifth resistor R25 to detect the external power supply; the twenty-fourth resistor R24 ​​has a thirty-seventh capacitor C37 connected in parallel at both ends.

[0083] See also Fig.14 The battery charging circuit includes a charging chip U6, a charging indication pin CHRG of the charging chip U6 is connected to the START-CHARGE pin of the information processing chip U17 through a twenty-sixth resistor R26, and a charging completion pin STDBY of the charging chip U6 is connected to the CHARGE-COMPLETE pin of the information processing chip U17 through a twenty-first resistor R21; a charging indication pin CHRG of the charging chip U6 is connected to the sixty-eighth resistor R68 of the external power input circuit through an eighteenth light-emitting diode D18 and a one-hundred-twelfth resistor R112 connected in series, and a charging completion pin STDBY of the charging chip U6 is connected to the sixty-eighth resistor R68 of the external power input circuit through a sixteenth light-emitting diode D16 and a one-hundred-seventh resistor R107 connected in series; a battery temperature detection pin TEMP of the charging chip U6 is connected to the charging battery through a sixty-ninth resistor R69, and is connected to the external power input circuit through a sixty-sixth resistor R66, and is grounded through a ninety-fourth resistor R94.

[0084] Specifically, the charging indication pin CHRG and the charging completion pin STDBY of the charging chip U6 are used to detect the start and completion status of battery charging. When charging starts, the CHRG pin is low level and the STDBY pin is high impedance. When charging is completed, the CHRG pin is high impedance and the STDBY pin is low level. The sixteenth light-emitting diode D16 and the eighteenth light-emitting diode D18 are charging indicator lights. The different resistance values ​​of the sixty-sixth resistor R66 and the ninety-fourth resistor R94 can control the charging temperature of the battery. For example, when R66=5.7967K and R94=147.8448K, the charging temperature is 0~45 degrees; when R66=6.8K and R94 is suspended, the charging temperature is less than 41 degrees.

[0085] See also Fig.15The automatic power supply switching circuit includes a third PMOS tube Q3 and a fourth PMOS tube Q4. The gate of the third PMOS tube Q3 is grounded through a seventieth resistor R70 and a ninety-fifth resistor R95 connected in series. The midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to an external power supply VCC-IN. The drain of the third PMOS tube Q3 is connected to a rechargeable battery. The drain of the third PMOS tube Q3 is also grounded through a ninety-ninth resistor R99 and a ninety-seventh resistor R97 connected in series. The midpoint of the ninety-ninth resistor R99 and the ninety-seventh resistor R97 is connected to the BT-ADC-IN6 pin of the information processing chip U17 to detect the battery voltage. The two ends of the ninety-seventh resistor R97 are connected in parallel with a forty-first capacitor C41. The seventeenth Schottky diode is connected between the drain and the source of the third PMOS tube Q3. The third PMOS tube D17, the source of the third PMOS tube Q3 is connected to the source of the fourth PMOS tube Q4, the midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to the source of the fourth PMOS tube Q4 through the fourteenth Schottky diode D14; the gate of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the forty-sixth resistor R46, the source of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the ninety-sixth resistor R96, the second pin of the key switch KEY1 is grounded, and the forty-seventh resistor R47 and the ninth capacitor C9 are connected in parallel between the first pin and the second pin of the key switch KEY1; the drain of the fourth PMOS tube Q4 is connected to the rechargeable battery, and the drain of the fourth PMOS tube Q4 is grounded through the second electrolytic capacitor EC2 and the fortieth capacitor C40 connected in parallel.

[0086] Specifically, in this embodiment, the external power interface J2 adopts a TYPE-C interface, the charging chip U6 adopts a TP4056 lithium battery charging chip to realize constant current and constant voltage linear charging of the lithium battery, the sixteenth light-emitting diode D16 and the eighteenth light-emitting diode D18 are charging indicator lights for displaying the battery charging status; the battery temperature detection pin TEMP of the charging chip U6 is used to detect the battery temperature, the sixty-sixth resistor R66 and the ninety-fourth resistor R94 are used to set the charging temperature to provide over-temperature protection function for the battery.

[0087] Specifically, the automatic power supply switching circuit is used for automatic switching between external power supply and battery power supply. When the key switch KEY1 is closed and the external power supply VCC-IN is input by the power supply, the third PMOS tube Q3 is turned off, the fourth PMOS tube Q4 is turned on, and the external power supply supplies power to the entire external display terminal device and charges the rechargeable battery at the same time; when the external power supply is removed, the third PMOS tube Q3 is turned on, the fourth PMOS tube Q4 is turned on, and the battery supplies power to the entire external display terminal device. The seventeenth Schottky diode D17 and the fourteenth Schottky diode D14 play the role of fast switching and reverse protection. The ninety-ninth resistor R99 and the ninety-seventh resistor R97 form a voltage divider circuit, which is connected to the BT-ADC-IN6 pin of the information processing chip U17 to provide a voltage detection function to display the battery power to the outside.

[0088] Preferably, see Fig.16 The Bluetooth receiving end power module includes a second DCDC power chip U5, a VIN pin of the second DCDC power chip U5 is connected to a 5V power supply, and is grounded through a thirty-second capacitor C32 and a twenty-sixth capacitor C226 connected in parallel, an enable pin EN of the second DCDC power chip U5 is connected to the VIN pin of the second DCDC power chip U5 through a fifteenth resistor R15; a VOUT pin of the second DCDC power chip U5 is connected to a VCC pin of the Bluetooth receiving chip U3 through an eighteenth resistor R18, a midpoint between the eighteenth resistor R18 and the VOUT pin of the second DCDC power chip U5 is grounded through a twenty-eighth capacitor C28 and a seventh capacitor C7 connected in parallel, and a midpoint between the eighteenth resistor R18 and the VCC pin of the Bluetooth receiving chip U3 is grounded through a one-hundred-second capacitor C102 and a one-hundred-third capacitor C103 connected in parallel.

[0089] In the above-mentioned wireless access display device, the external display terminal device and the host terminal device adopt a wireless connection method, so that the external display terminal device can be placed as needed, which improves the flexibility and convenience of device movement, and can provide a long-distance display function as needed; the wireless connection method avoids the unstable data transmission caused by loose wired cables or poor connections, and provides users with a more convenient and reliable remote display solution, meeting the display requirements under different needs and scenarios, and improving the user experience. The utility model has a simple structure, is easy to implement, has low cost, and is easy to promote.

[0090] It should be noted that the present invention is not limited to the above-mentioned embodiments. According to the creative spirit of the present invention, those skilled in the art may also make other changes. These changes made according to the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A wireless access display device for remotely displaying host data, characterized in that: It comprises a host-end device and an external display-end device, wherein the host-end device comprises a wireless transmitting device, and the external display-end device comprises a wireless receiving device, an external display information processing device, an external display driving device and an external display device connected in sequence; the wireless transmitting device and the wireless receiving device can establish a wireless connection between the host-end device and the external display-end device, so that the data required to be displayed externally of the host-end device can be displayed on the external display-end device; the external display information processing device of the external display-end device is used to transmit the data required to be displayed externally received by the wireless receiving device to the external display driving device, and the data is displayed externally by the external display device.

2. The wireless access display device according to claim 1, characterized in that: The host-end device also includes a DB9 interface J1, which is used to connect the wireless transmitting device with the host device. The wireless transmitting device includes a Bluetooth transmitting chip U1, and the ANT pin of the Bluetooth transmitting chip U1 is connected to the transmitting antenna. The wireless receiving device includes a Bluetooth receiving chip U3, and the ANT pin of the Bluetooth receiving chip U3 is connected to the receiving antenna. A wireless connection is established between the Bluetooth transmitting chip U1 and the Bluetooth receiving chip U3, and data to be displayed is transmitted; the external information processing device includes an information processing chip U17, and the output end of the Bluetooth receiving chip U3 is connected to the input end of the information processing chip U17. The received data signal to be displayed is processed by the information processing chip U17 and transmitted to the external display device.

3. The wireless access display device according to claim 2, characterized in that: The sending pin TX of the DB9 interface J1 is connected to the receiving pin UART-TX of the Bluetooth transmitting chip U1 through the second resistor R2 and the eighth resistor R8 connected in series, and the midpoint of the second resistor R2 and the eighth resistor R8 is grounded through the fifth resistor R5; the receiving pin RX of the DB9 interface J1 is connected to the sending pin UART-RX of the Bluetooth transmitting chip U1 through the first resistor R1 and the ninth resistor R9 connected in series, and the midpoint of the first resistor R1 and the ninth resistor R9 is grounded through the sixth resistor R6; the DCS pin of the DB9 interface J1 is connected to the initialization pin RST of the Bluetooth transmitting chip U1 through the third resistor R3 and the twelfth resistor R12 connected in series, and the midpoint of the third resistor R3 and the twelfth resistor R12 is grounded through the fourth resistor R4; the initialization pin RST of the Bluetooth transmitting chip U1 is connected to the 3.3V power supply through the thirteenth resistor R13 and is grounded through the first capacitor C1; The transmitting pin TX, the receiving pin RX and the DCS pin of the DB9 interface J1 are respectively connected to the first transient voltage suppression tube DZ1, the ninth transient voltage suppression tube DZ9 and the second transient voltage suppression tube DZ2 to suppress transient overvoltage or spike voltage.

4. The wireless access display device according to claim 2, characterized in that: The host-end device also includes a Bluetooth transmitter power module, which includes a first DCDC power chip U2, a power input terminal VIN of the first DCDC power chip U2 is connected to a 5V power supply through a first magnetic bead inductor L1, a midpoint between the first magnetic bead inductor L1 and the VIN pin is grounded through a first thirty-first capacitor C31 and a second twenty-fifth capacitor C225 connected in parallel, and a midpoint between the first magnetic bead inductor L1 and the 5V power supply is grounded through a second capacitor C2 and a second transient voltage suppression tube TVS2 connected in parallel; an enable pin EN of the first DCDC power chip U2 is connected to the power input terminal VIN through a fifteenth resistor R15; an output voltage of a voltage output pin VOUT of the first DCDC power chip U2 is 3.3V, and the voltage output pin VOUT of the first DCDC power chip U2 is grounded through a twenty-fourth capacitor C24 and a twenty-first capacitor C21 connected in parallel.

5. The wireless access display device according to claim 2, characterized in that: The serial data interface RX / TX of the Bluetooth receiving chip U3 is connected to the serial data pin UART2-TX / UART2-RX of the information processing chip U17 through the thirty-ninth capacitor R39 and the fortieth resistor R40, respectively. The serial data interface RX / TX of the Bluetooth receiving chip U3 is also connected to the 3.3V power supply through the eighty-fourth resistor R84 and the eighty-fifth resistor R85, respectively. The initialization pin RST of the Bluetooth receiving chip U3 is connected to the reset pin HC08U-IO1 of the information processing chip U17 through the twenty-second resistor R22. The midpoint between the twenty-second resistor R22 and the initialization pin RST is grounded through the seventeenth capacitor C17 and connected to the 3.3V power supply through the twenty-seventh resistor R27.

6. The wireless access display device according to claim 5, characterized in that: The XIN pin and XOUT pin of the information processing chip U17 are connected to an external crystal oscillator, and the crystal oscillator is used to provide a clock signal for the information processing chip U17. The XIN pin and XOUT pin are grounded through the sixth capacitor C6 and the fifth capacitor C5 respectively; The PB15-MOSI2 pin of the information processing chip U17 is connected to the cathode of the eighth light emitting diode D8 through the sixteenth resistor F16, and the anode of the eighth light emitting diode D8 is connected to the 3.3V power supply; The JTMS / SWDIO pin of the information processing chip U17 is connected to the third pin of the SWD debugging interface P1 through a sixty-third resistor R63, the JTCK / SWCLK pin of the information processing chip U17 is connected to the second pin of the SWD debugging interface P1 through a sixty-fourth resistor R64, and the M3-NRST pin of the information processing chip U17 is connected to the first pin of the SWD debugging interface P1 through a sixty-second resistor R62; The fifth pin of the SWD debugging interface P1 is connected to a 3.3V power supply through a sixty-fifth resistor R65, the third pin of the SWD debugging interface P1 is connected to a 3.3V power supply through a fifty-second resistor R52, and the fourth pin of the SWD debugging interface P1 is grounded; The M3-PA10-RXD1 pin of the information processing chip U17 is connected to the first pin of the test interface J10 through the tenth diode D10 and the one hundred and fifth resistor R105 connected in series, the anode of the tenth diode D10 is connected to the 3.3V power supply through the one hundred and fourth resistor R104, and the cathode of the tenth diode D10 is connected to the one hundred and fifth resistor R105; the M3-PA9TXD1 pin of the information processing chip U17 is connected to the second pin of the test interface J10 through the one hundred and sixth resistor R106; The MCU-SDAT pin, the MCU-CLK pin and the MCU-CS pin of the information processing chip U17 are connected to the input end of the external display driving device.

7. The wireless access display device according to claim 6, characterized in that: The external display driving device includes an LED driving chip U2, and a signal input end of the LED driving chip U2 is connected to the external display information processing device; The data input pin DIN of the LED driver chip U2 is connected to the MCU-SDAT pin of the information processing chip U17 through the one hundred and third resistor R103, and is also connected to the 5V power supply through the thirty-eighth resistor R38; the clock input pin SCLK of the LED driver chip U2 is connected to the MCU-CLK pin of the information processing chip U17 through the one hundred and second resistor R102, and is also connected to the 5V power supply through the thirty-seventh resistor R37; the chip select pin STB of the LED driver chip U2 is connected to the MCU-CS pin of the information processing chip U17 through the one hundred and first resistor R101, and is also connected to the 5V power supply through the twenty-eighth resistor R28; The SEG1-SEG8 pins and the GRID1-GRID16 pins of the LED driver chip U2 are connected to the external display device.

8. The wireless access display device according to claim 7, characterized in that: The external display device includes a plurality of display modules, and the A / B / C / D / E / F / G / DP pins of each display module are respectively connected to the SEG1~SEG8 pins of the LED driver chip U2; each display module includes a plurality of display units, and each display unit has a bit selection port, and the bit selection port of each display unit is connected to one of the GRID1~GRID16 pins of the LED driver chip U2; A sixty-first resistor R61 and a ninth light emitting diode LED9 connected in series are connected between the SEG8 pin and the GRID8 pin of the LED driver chip U2.

9. The wireless access display device according to claim 5, characterized in that: The external display terminal device also includes a receiving end power supply module, which includes an external power input circuit, a battery charging circuit, an automatic power supply switching circuit and a Bluetooth receiving end power supply module. The external power input circuit is used to connect an external power supply, and the external power input circuit is electrically connected to the battery charging circuit. The automatic power supply switching circuit is used to switch between external power supply and battery power supply. The Bluetooth receiving end power supply module is used to power the wireless receiving device; the receiving end power supply module is used to provide working power for the external display terminal device.

10. The wireless access display device according to claim 9, characterized in that: The external power input circuit includes an external power input interface J2, a VBUS pin of the external power input interface J2 is connected to the battery charging circuit through a sixty-eighth resistor R68 after passing through a fuse F1, a midpoint of the fuse F1 and the sixty-eighth resistor R68 is grounded through a first electrolytic capacitor EC1 and a nineteenth capacitor C19 connected in parallel, the midpoint of the fuse F1 and the sixty-eighth resistor R68 is also grounded through a twenty-third resistor R23 and a twenty-fourth resistor R24 ​​connected in series, a midpoint of the twenty-third resistor R23 and the twenty-fourth resistor R24 ​​is connected to a DC5V-ADC-IN5 pin of the information processing chip U17 through a twenty-fifth resistor R25, so as to detect an external power supply; two ends of the twenty-fourth resistor R24 ​​are connected in parallel with a thirty-seventh capacitor C37; The battery charging circuit includes a charging chip U6, a charging indication pin CHRG of the charging chip U6 is connected to a START-CHARGE pin of the information processing chip U17 through a twenty-sixth resistor R26, and a charging completion pin STDBY of the charging chip U6 is connected to a CHARGE-COMPLETE pin of the information processing chip U17 through a twenty-first resistor R21; a charging indication pin CHRG of the charging chip U6 is connected to a sixty-eighth resistor R68 of the external power input circuit through an eighteenth light-emitting diode D18 and a one-hundred-twelfth resistor R112 connected in series, and a charging completion pin STDBY of the charging chip U6 is connected to a sixty-eighth resistor R68 of the external power input circuit through a sixteenth light-emitting diode D16 and a one-hundred-seventh resistor R107 connected in series; a battery temperature detection pin TEMP of the charging chip U6 is connected to a charging battery through a sixty-ninth resistor R69, and is connected to the external power input circuit through a sixty-sixth resistor R66, and is grounded through a ninety-fourth resistor R94; The automatic power supply switching circuit includes a third PMOS tube Q3 and a fourth PMOS tube Q4. The gate of the third PMOS tube Q3 is grounded through a seventieth resistor R70 and a ninety-fifth resistor R95 connected in series. The midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to an external power supply VCC-IN. The drain of the third PMOS tube Q3 is connected to a rechargeable battery. The drain of the third PMOS tube Q3 is also grounded through a ninety-ninth resistor R99 and a ninety-seventh resistor R97 connected in series. The midpoint of the ninety-ninth resistor R99 and the ninety-seventh resistor R97 is connected to the BT-ADC-IN6 pin of the information processing chip U17 to detect the battery voltage. The two ends of the ninety-seventh resistor R97 are connected in parallel with a forty-first capacitor C41. A seventeenth Schottky diode is connected between the drain and source of the third PMOS tube Q3. The third PMOS tube D17, the source of the third PMOS tube Q3 is connected to the source of the fourth PMOS tube Q4, the midpoint of the seventieth resistor R70 and the ninety-fifth resistor R95 is connected to the source of the fourth PMOS tube Q4 through the fourteenth Schottky diode D14; the gate of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the forty-sixth resistor R46, the source of the fourth PMOS tube Q4 is connected to the first pin of the key switch KEY1 through the ninety-sixth resistor R96, the second pin of the key switch KEY1 is grounded, and the forty-seventh resistor R47 and the ninth capacitor C9 are connected in parallel between the first pin and the second pin of the key switch KEY1; the drain of the fourth PMOS tube Q4 is connected to the rechargeable battery, and the drain of the fourth PMOS tube Q4 is grounded through the second electrolytic capacitor EC2 and the fortieth capacitor C40 connected in parallel; The Bluetooth receiving end power module includes a second DCDC power chip U5, a VIN pin of the second DCDC power chip U5 is connected to a 5V power supply and is grounded through a thirty-second capacitor C32 and a twenty-sixth capacitor C226 connected in parallel, an enable pin EN of the second DCDC power chip U5 is connected to the VIN pin of the second DCDC power chip U5 through a fifteenth resistor R15; a VOUT pin of the second DCDC power chip U5 is connected to a VCC pin of the Bluetooth receiving chip U3 through an eighteenth resistor R18, a midpoint between the eighteenth resistor R18 and the VOUT pin of the second DCDC power chip U5 is grounded through a twenty-eighth capacitor C28 and a seventh capacitor C7 connected in parallel, and a midpoint between the eighteenth resistor R18 and the VCC pin of the Bluetooth receiving chip U3 is grounded through a one-hundred-second capacitor C102 and a one-hundred-third capacitor C103 connected in parallel.

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