Multifunctional micro air pump

Abstract

The utility model discloses a multifunctional micro -pneumatic pump, including casing and set main control circuit, power supply battery, direct current input circuit, battery charging circuit, direct current conversion circuit, motor control circuit, lighting circuit, instruction input circuit, input detection circuit and battery switch circuit in casing, direct current input circuit connects the first input of battery charging circuit and direct current conversion circuit, and battery charging circuit connects power supply battery, and power supply battery connects the second input of direct current conversion circuit through battery switch circuit, and direct current conversion circuit supplies power for main control circuit, lighting circuit and gas pumping device, and main control circuit is connected with battery switch circuit, lighting circuit, instruction input circuit and motor control circuit respectively, and main control circuit connects direct current input circuit through input detection circuit, and motor control circuit is connected with gas pumping device, the utility model discloses have two power supply modes of battery power supply and external power supply, and have the lighting function, can be convenient for user to use.

Description

Technical Field

[0001] This utility model relates to the field of air pumps, and in particular to a multifunctional miniature air pump. Background Technology

[0002] A miniature air pump is a small, portable air pump. Currently available miniature air pumps typically only have one power source: batteries. If the battery voltage is insufficient, the miniature air pump will not function properly. Furthermore, existing miniature air pumps only have an inflation function, making their functionality relatively limited.

[0003] In view of the above problems, it is necessary to study a multifunctional micro air pump that has both battery power and external power supply, and also has a lighting function, making it convenient for users to use. Utility Model Content

[0004] The purpose of this utility model is to provide a multifunctional miniature air pump, which has two power supply methods: battery power and external power supply, and also has a lighting function, making it convenient for users to use.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A multifunctional miniature air pump includes a housing and a main control circuit, a power supply battery, a DC input circuit, a battery charging circuit, a DC-DC converter circuit, a motor control circuit, a lighting circuit, a command input circuit, an input detection circuit, and a battery switch circuit disposed within the housing. The output terminal of the DC input circuit is connected to the input terminal of the battery charging circuit and the first input terminal of the DC-DC converter circuit. The output terminal of the battery charging circuit is connected to the power supply battery. The power supply battery is connected to the second input terminal of the DC-DC converter circuit through the battery switch circuit. The output terminal of the DC-DC converter circuit supplies power to the main control circuit, the lighting circuit, and the air pumping device. The main control circuit is connected to the battery switch circuit, the lighting circuit, the command input circuit, and the motor control circuit, respectively. The main control circuit is connected to the DC input circuit through the input detection circuit. The motor control circuit is connected to the air pumping device. A lampshade is provided on the housing corresponding to the lighting circuit.

[0007] The input terminal of the battery switch circuit is connected to the positive terminal of the power supply battery, the output terminal of the battery switch circuit is connected to the second input terminal of the DC-DC converter circuit, the control terminal of the battery switch circuit is connected to the output terminal of the battery switch circuit through a self-locking circuit, and the control terminal of the battery switch circuit is connected to the first port of the main control circuit; the power supply terminal of the command input circuit is connected to the positive terminal of the power supply battery, and the output terminal of the command input circuit is connected to the first port of the main control circuit and the control terminal of the battery switch circuit.

[0008] The battery switch circuit includes a resistor R11, a transistor Q6, and a MOSFET Q3; the first end of the resistor R11 and the source of the MOSFET Q3 are connected to the input terminal of the battery switch circuit, the drain of the MOSFET Q3 is connected to the output terminal of the battery switch circuit, the gate of the MOSFET Q3 and the second end of the resistor R11 are connected to the collector of the transistor Q6, the base of the transistor Q6 is connected to the control terminal of the battery switch circuit, and the emitter of the transistor Q6 is grounded.

[0009] The self-locking circuit includes resistors R12 and R19. The first end of resistor R12 is connected to the output terminal of the battery switch circuit, the second end of resistor R12 and the first end of resistor R19 are connected to the control terminal of the battery switch circuit, and the second end of resistor R19 is grounded.

[0010] The first port of the main control circuit is connected to the switch terminal of the battery charging circuit through diode D5. The positive terminal of diode D5 is connected to the first port of the main control circuit, and the negative terminal of diode D5 is connected to the switch terminal of the battery charging circuit. The voltage at the switch terminal of the battery charging circuit controls whether the battery charging circuit works.

[0011] The battery charging circuit includes resistors R3, R4, R8, R9, R20, R23, and R25, an inductor L1, a diode D6, a MOSFET Q1, a transistor Q2, a charging control chip U1, a charging indicator LED72, and a full charge indicator LED71. The source of MOSFET Q1, the first terminal of resistors R3, R20, and R23 are connected to the input terminal of the battery charging circuit. The gate of MOSFET Q1 and the second terminal of resistor R3 are connected to the collector of transistor Q2. The base of transistor Q2 is connected to the first terminals of resistors R8 and R9. The emitter of transistor Q2 and the second terminal of resistor R8 are grounded. The second terminal of resistor R9 is connected to the cathode of diode D6 and also to the switch of the battery charging circuit. The positive terminal of diode Q6 is connected to the negative terminal of charging indicator LED72 and the first terminal of resistor R25. The positive terminal of charging indicator LED72 is connected to the second terminal of resistor R23. The positive terminal of fully charged indicator LED71 is connected to the second terminal of resistor R20. The CHRG and DONE pins of charging control chip U1 are connected to the negative terminal of fully charged indicator LED71 and the second terminal of resistor R25, respectively. The NTC and GND pins of charging control chip U1 are grounded. The VIN pin of charging control chip U1 is connected to the drain of MOSFET Q1. The LX pin of charging control chip U1 is connected to the first terminal of inductor L1. The BATT pin of charging control chip U1 and the first terminal of resistor R4 are connected to the output terminal of the battery charging circuit. The CSP pin of charging control chip U1 is connected to the second terminal of resistor R4 and the second terminal of inductor L1.

[0012] The command input circuit includes a resistor R10 and a push-button switch SW1; the first end of the resistor R10 is connected to the power supply terminal of the command input circuit, the second end of the resistor R10 is connected to the first end of the push-button switch SW1, and the second end of the push-button switch SW1 is connected to the output terminal of the command input circuit; the power supply terminal of the command input circuit is connected to the positive terminal of the power supply battery, and the output terminal of the command input circuit is connected to the first port of the main control circuit.

[0013] The multifunctional miniature air pump also includes a battery undervoltage detection circuit installed in the housing. The input terminal of the battery undervoltage detection circuit is connected to the output terminal of the battery switch circuit, and the output terminal of the battery undervoltage detection circuit is connected to the second port of the main control circuit. The battery undervoltage detection circuit includes resistors R13 and R18. The first terminal of resistor R13 is connected to the input terminal of the battery undervoltage detection circuit, and the second terminal of resistor R13 and the first terminal of resistor R18 are connected to the output terminal of the battery undervoltage detection circuit. The second terminal of resistor R18 is grounded.

[0014] The lighting circuit includes a lighting switch circuit and an LED lamp circuit. The positive terminal of the LED lamp circuit is connected to the power supply terminal of the lighting circuit, the negative terminal of the LED lamp circuit is connected to the input terminal of the lighting switch circuit, the output terminal of the lighting switch circuit is grounded, and the control terminal of the lighting switch circuit is connected to the second port of the main control circuit.

[0015] The motor control circuit includes resistors R14 and R16, a MOSFET Q4, and a diode D2. The first end of resistor R14 is connected to the control terminal of the motor control circuit, the second end of resistor R14 is connected to the gate of MOSFET Q4 and the first end of resistor R16, the source of MOSFET Q4 and the second end of resistor R16 are grounded, the drain of MOSFET Q4 and the anode of diode D2 are connected to the first motor connection terminal of the motor control circuit, and the cathode of diode D2 is connected to the second motor connection terminal of the motor control circuit. The control terminal of the motor control circuit is connected to the third port of the main control circuit, and the first and second motor connection terminals of the motor control circuit are connected to the gas pumping device.

[0016] The DC-DC converter circuit includes diodes D1 and D3, inductor L2, capacitors C6 and C7, and DC-DC chip U2. The anodes of diodes D3 and D1 are connected to the first and second input terminals of the DC-DC converter circuit, respectively. The cathodes of diodes D3 and D1, and the first terminal of capacitor C1 are connected to the first terminal of inductor L2. The second terminal of inductor L2 is connected to the LX pin of DC-DC chip U2. The VOUT pin of DC-DC chip U2 and the first terminal of capacitor C6 are connected to the output terminal of the DC-DC converter circuit. The GND pin of DC-DC chip U2, the second terminal of capacitor C6, and the second terminal of capacitor C7 are grounded.

[0017] The input detection circuit includes resistors R2 and R5. The first end of resistor R2 is connected to the input terminal of the input detection circuit, and the second end of resistor R2 and the first end of resistor R5 are connected to the output terminal of the input detection circuit. The second end of resistor R5 is grounded. The input terminal of the input detection circuit is connected to the output terminal of the DC input circuit, and the output terminal of the input detection circuit is connected to the fourth port of the main control circuit.

[0018] The DC input circuit has a power input interface J1; the housing is provided with a clearance opening corresponding to the power input interface J1, and the clearance opening is fitted with a protective plug.

[0019] The outer side of the housing is provided with a connecting part, and the connecting part is provided with a connecting hole.

[0020] With the above solution, the multifunctional micro air pump of this invention has two power supply modes: battery power and external power supply, which is convenient for users. When the DC input circuit is not connected to an external power source, the DC-DC converter circuit of this invention supplies power to the main control circuit, lighting circuit, and gas pumping device through the battery. At this time, the battery switch circuit is turned on, realizing the battery power supply mode. If the DC input circuit is connected to an external power source, the DC-DC converter circuit supplies power to the main control circuit, lighting circuit, and gas pumping device through the external power source. At this time, the main control circuit controls the battery switch circuit to turn off, so that the battery does not output power to the DC-DC converter circuit, realizing the external power supply mode. In addition, this invention also includes a lighting circuit to realize the lighting function, and the operation of this lighting circuit is controlled by the main control circuit. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0023] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0024] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 4 .

[0025] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 5 .

[0026] Figure 6 This is the circuit schematic diagram of this utility model.

[0027] Label Explanation:

[0028] Housing 1, lampshade 101, air inlet 102, air outlet 103, clearance opening 104, protective plug 105, button cap 106, connecting part 107, connecting hole 1071, main control circuit 2, power supply battery 3, gas pumping device 4, DC input circuit 5, battery charging circuit 6, DC-DC conversion circuit 7, motor control circuit 8, lighting circuit 9, lighting switch circuit 901, LED light circuit 902, command input circuit 10, input detection circuit 11, battery switch circuit 12, self-locking circuit 13, battery undervoltage detection circuit 14. Detailed Implementation

[0029] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0030] like Figures 1 to 6 As shown, this utility model discloses a multifunctional miniature air pump, including a housing 1 and a main control circuit 2, a power supply battery 3, a gas pumping device 4, a DC input circuit 5, a battery charging circuit 6, a DC-DC converter circuit 7, a motor control circuit 8, a lighting circuit 9, a command input circuit 10, an input detection circuit 11, and a battery switch circuit 12 disposed in the housing 1. The output terminal of the DC input circuit 5 is connected to the input terminal of the battery charging circuit 6 and the first input terminal of the DC-DC converter circuit 7. The output terminal of the battery charging circuit 6 is connected to the power supply battery 3. The power supply battery 3 is connected to the second input terminal of the DC-DC converter circuit 7 through the battery switch circuit 12. The output terminal of the DC-DC converter circuit 7 supplies power to the main control circuit 2, the lighting circuit 9, and the gas pumping device 4. The main control circuit 2 is connected to the battery switch circuit 12, the lighting circuit 9, the command input circuit 10, and the motor control circuit 8, respectively. The main control circuit 2 is connected to the DC input circuit 5 through the input detection circuit 11. The motor control circuit 8 is connected to the gas pumping device 4. A lampshade 101 is provided on the housing 1 corresponding to the lighting circuit 9.

[0031] This utility model's multifunctional micro air pump offers two power supply options: battery power and external power supply, providing convenience for users. When the DC input circuit 5 is not connected to an external power source, the DC-DC converter circuit 7 supplies power to the main control circuit 2, lighting circuit 9, and gas pumping device 4 via the battery 3. In this case, the battery switch circuit 12 is activated, enabling battery power. Conversely, if the DC input circuit 5 is connected to an external power source, the DC-DC converter circuit 7 supplies power to the main control circuit 2, lighting circuit 9, and gas pumping device 4 via the external power source. In this case, the main control circuit 2 controls the battery switch circuit 12 to deactivate, preventing the battery 3 from supplying power to the DC-DC converter circuit 7, thus enabling external power supply. Furthermore, this utility model includes a lighting circuit 9 for illumination, the operation of which is controlled by the main control circuit 2.

[0032] In this embodiment of the present invention, the input terminal of the battery switch circuit 12 is connected to the positive terminal of the power supply battery 3, the output terminal of the battery switch circuit 12 is connected to the second input terminal of the DC-DC converter circuit 7, the control terminal of the battery switch circuit 12 is connected to the output terminal of the battery switch circuit 12 through the self-locking circuit 13, and the control terminal of the battery switch circuit 12 is connected to the first port of the main control circuit 2; the power supply terminal of the command input circuit 10 is connected to the positive terminal of the power supply battery 3, and the output terminal of the command input circuit 10 is connected to the first port of the main control circuit 2 and the control terminal of the battery switch circuit 12; thus, the on / off state of the battery switch circuit 12 can be controlled by the command input circuit 10 and the main control circuit 2, and the battery switch circuit 12 can achieve conduction self-locking through the self-locking circuit 13. Specifically, the battery switch circuit 12 includes a resistor R11, a transistor Q6, and a MOSFET Q3. The first terminal of resistor R11 and the source of MOSFET Q3 are connected to the input terminal of the battery switch circuit 12. The drain of MOSFET Q3 is connected to the output terminal of the battery switch circuit 12. The gate of MOSFET Q3 and the second terminal of resistor R11 are connected to the collector of transistor Q6. The base of transistor Q6 is connected to the control terminal of the battery switch circuit 12. The emitter of transistor Q6 is grounded. The self-locking circuit 13 includes a resistor R12 and a resistor R19. The first terminal of resistor R12 is connected to the output terminal of the battery switch circuit 12. The second terminals of resistor R12 and the first terminal of resistor R19 are connected to the control terminal of the battery switch circuit 12. The second terminal of resistor R19 is grounded. The instruction input circuit 10 includes a resistor R10 and a push-button switch SW1; the first end of the resistor R10 is connected to the power supply terminal of the instruction input circuit 10, the second end of the resistor R10 is connected to the first end of the push-button switch SW1, and the second end of the push-button switch SW1 is connected to the output terminal of the instruction input circuit 10; the power supply terminal of the instruction input circuit 10 is connected to the positive terminal of the power supply battery 3, and the output terminal of the instruction input circuit 10 is connected to the first port of the main control circuit 2.

[0033] To facilitate understanding of this utility model, the following describes two ways of using this utility model.

[0034] The first usage method is:

[0035] When the multifunctional miniature air pump of this utility model is in standby mode, if the user briefly presses the button switch SW1, the instruction input circuit 10 provides a control signal to the control terminal of the battery switch circuit 12 when the button switch SW1 is turned on, so that the battery switch circuit 12 is turned on first, ensuring that the power supply battery 3 supplies power to the DC-DC converter circuit 7 through the battery switch circuit 12, thereby enabling the main control circuit 2 to work; at this time, the main control circuit 2 detects whether the DC input circuit 5 is connected to an external power source through the input detection circuit 11.

[0036] If the DC input circuit 5 is not connected to an external power source, the first port of the main control circuit 2 will not control the battery switch circuit 12, and the first port of the main control circuit 2 will be in input mode to detect whether the push button switch SW1 is pressed (the first port of the main control circuit 2 has an analog-to-digital conversion function, and the main control circuit 2 determines whether the push button switch SW1 is pressed by detecting the voltage of the first port. When the push button switch SW1 is pressed, the voltage of the first port is low, and when the push button switch SW1 is not pressed, the voltage of the first port is high). At this time, the self-locking circuit 13 locks the battery switch circuit 12 in the on state, so that the power supply battery 3 continuously supplies power to the main control circuit 2, the lighting circuit 9 and the gas pumping device 4 through the battery switch circuit 12 and the DC-DC converter circuit 7, realizing the battery power supply mode. After that, the main control circuit 2 controls the gas pumping device 4 to work through the motor control circuit 8, thereby performing inflation.

[0037] If the DC input circuit 5 is connected to an external power source, the first port of the main control circuit 2 first outputs a low-level signal to control the battery switch circuit 12 to turn off. Then, the first port of the main control circuit 2 switches to the input mode to detect whether the push button switch SW1 is pressed. At this time, the external power source continuously supplies power to the main control circuit 2, the lighting circuit 9, and the gas pumping device 4 through the DC-DC converter circuit 7, realizing the external power supply method. At this time, the main control circuit 2 controls the gas pumping device 4 to work through the motor control circuit 8, thereby performing inflation.

[0038] When the gas pumping device 4 is working, the main control circuit 2 detects that the user has briefly pressed the button switch SW1. Then, the main control circuit 2 controls the gas pumping device 4 to stop working through the motor control circuit 8. At the same time, the first port of the main control circuit 2 switches to the output mode and outputs a low-level signal to control the battery switch circuit 12 to turn off, ensuring that the power supply does not output electrical energy to the DC-DC converter circuit 7.

[0039] The second way to use it is:

[0040] When the multifunctional miniature air pump of this utility model is in standby mode, if the user presses and holds the button switch SW1, the instruction input circuit 10 provides a high-level signal to the control terminal of the battery switch circuit 12 when the button switch SW1 is turned on, so that the battery switch circuit 12 is turned on first, ensuring that the power supply battery 3 supplies power to the DC-DC converter circuit 7 through the battery switch circuit 12, so that the main control circuit 2 works; at this time, the main control circuit 2 detects whether the DC input circuit 5 is connected to an external power source through the input detection circuit 11.

[0041] If the DC input circuit 5 is not connected to an external power source, the first port of the main control circuit 2 does not control the battery switch circuit 12, and the first port of the main control circuit 2 is in input mode to detect whether the push button switch SW1 is pressed (the first port of the main control circuit 2 has an analog-to-digital conversion function, and the main control circuit 2 determines whether the push button switch SW1 is pressed by detecting the voltage of the first port. When the push button switch SW1 is pressed, the voltage of the first port is high, and when the push button switch SW1 is not pressed, the voltage of the first port is low). At this time, the self-locking circuit 13 locks the battery switch circuit 12 in the on state, so that the power supply battery 3 continuously supplies power to the main control circuit 2, the lighting circuit 9 and the gas pumping device 4 through the battery switch circuit 12 and the DC-DC converter circuit 7, realizing the battery power supply mode. In addition, since the push button switch SW1 is still pressed at this time, the main control circuit 2 detects that the push button switch SW1 is pressed and controls the lighting circuit 9 to work, thereby providing illumination.

[0042] If the DC input circuit 5 is connected to an external power source, the first port of the main control circuit 2 first outputs a low-level signal to control the battery switch circuit 12 to turn off. Then, the first port of the main control circuit 2 switches to input mode to detect whether the push button switch SW1 is pressed. At this time, the external power source continuously supplies power to the main control circuit 2, the lighting circuit 9, and the gas pumping device 4 through the DC-DC converter circuit 7, realizing the external power supply method. At this time, the main control circuit 2 controls the gas pumping device 4 to work through the motor control circuit 8, thereby performing inflation. Furthermore, since the push button switch SW1 is still in the pressed state at this time, the main control circuit 2 detects that the push button switch SW1 is pressed and controls the lighting circuit 9 to work, thereby providing illumination.

[0043] When the lighting circuit 9 is working, the main control circuit 2 detects that the user has briefly pressed the button switch SW1. Then, the main control circuit 2 controls the lighting circuit 9 to stop working through the motor control circuit 8. At the same time, the first port of the main control circuit 2 switches to output mode and outputs a low-level signal to control the battery switch circuit 12 to turn off, ensuring that the power supply does not output power to the DC-DC converter circuit 7.

[0044] As described above, the first usage mode of this utility model can be summarized as follows: pressing button SW1 once activates the gas pumping device 4, and pressing button SW1 again once deactivates the gas pumping device 4. The second usage mode of this utility model can be summarized as follows: pressing button SW1 once activates the lighting circuit 9, and pressing button SW1 again once deactivates the lighting circuit 9.

[0045] In an embodiment of this utility model, the first port of the main control circuit 2 can be connected to the switching terminal of the battery charging circuit 6 via diode D5. The positive terminal of diode D5 is connected to the first port of the main control circuit 2, and the negative terminal of diode D5 is connected to the switching terminal of the battery charging circuit 6. The switching terminal voltage of the battery charging circuit 6 controls whether the battery charging circuit 6 works.

[0046] In an embodiment of this utility model, the battery charging circuit 6 includes resistors R3, R4, R8, R9, R20, R23, and R25, an inductor L1, a diode D6, a MOSFET Q1, a transistor Q2, a charging control chip U1, a charging indicator LED72, and a full charge indicator LED71. The charging control chip U1 can be an HC2081. The source of the MOSFET Q1, the first terminal of resistor R3, the first terminal of resistor R20, and the first terminal of resistor R23 are connected to the input terminal of the battery charging circuit 6. The gate of the MOSFET Q1 and the second terminal of resistor R3 are connected to the collector of the transistor Q2. The base of the transistor Q2 is connected to the first terminal of resistor R8 and the first terminal of resistor R9. The emitter of the transistor Q2 and the second terminal of resistor R8 are grounded. The second terminal of resistor R9 is connected to the cathode of diode D6, and resistor R... The second terminal of 9 is connected to the switch terminal of the battery charging circuit 6. The positive terminal of diode Q6 is connected to the negative terminal of the charging indicator LED72 and the first terminal of resistor R25. The positive terminal of the charging indicator LED72 is connected to the second terminal of resistor R23. The positive terminal of the fully charged indicator LED71 is connected to the second terminal of resistor R20. The CHRG and DONE pins of the charging control chip U1 are connected to the negative terminal of the fully charged indicator LED71 and the second terminal of resistor R25, respectively. The NTC and GND pins of the charging control chip U1 are grounded. The VIN pin of the charging control chip U1 is connected to the drain of MOSFET Q1. The LX pin of the charging control chip U1 is connected to the first terminal of inductor L1. The BATT pin of the charging control chip U1 and the first terminal of resistor R4 are connected to the output terminal of the battery charging circuit 6. The CSP pin of the charging control chip U1 is connected to the second terminal of resistor R4 and the second terminal of inductor L1. When the DC input circuit 5 is connected to an external power source to charge the power supply battery 3, the charging indicator LED72 lights up; when the power supply battery 3 is charging, the fully charged indicator LED71 lights up, the transistor Q2 turns off, which in turn turns off the MOSFET Q1, thereby stopping the charging of the power supply battery 3 and preventing the power supply battery 3 from being overcharged.

[0047] In an embodiment of this utility model, the multifunctional micro air pump may further include a battery undervoltage detection circuit 14 disposed in the housing 1. The input terminal of the battery undervoltage detection circuit 14 is connected to the output terminal of the battery switch circuit 12, and the output terminal of the battery undervoltage detection circuit 14 is connected to the second port of the main control circuit 2. The battery undervoltage detection circuit 14 includes resistors R13 and R18. The first end of resistor R13 is connected to the input terminal of the battery undervoltage detection circuit 14, and the second end of resistor R13 and the first end of resistor R18 are connected to the output terminal of the battery undervoltage detection circuit 14. The second end of resistor R18 is grounded. When the main control circuit 2 is working, the main control circuit 2 detects whether the power supply battery 3 is undervoltage through the battery undervoltage detection circuit 14. If the power supply battery 3 is undervoltage, the main control circuit 2 controls the gas pumping device 4 to stop working through the motor control circuit 8, thereby preventing the power supply battery 3 from being over-discharged.

[0048] In an embodiment of this utility model, the lighting circuit 9 may include a lighting switch circuit 901 and an LED lamp circuit 902. The positive terminal of the LED lamp circuit 902 is connected to the power supply terminal of the lighting circuit 9, the negative terminal of the LED lamp circuit 902 is connected to the input terminal of the lighting switch circuit 901, the output terminal of the lighting switch circuit 901 is grounded, and the control terminal of the lighting switch circuit 901 is connected to the second port of the main control circuit 2. The main control circuit 2 controls whether the LED lamp circuit 902 works by controlling the on / off state of the lighting switch circuit 901, thereby realizing the control of the lighting circuit 9. The lighting switch circuit 901 may be a transistor switching circuit.

[0049] In an embodiment of this utility model, the motor control circuit 8 includes a resistor R14, a resistor R16, a MOSFET Q4, and a diode D2. The first end of the resistor R14 is connected to the control terminal of the motor control circuit 8, the second end of the resistor R14 is connected to the gate of the MOSFET Q4 and the first end of the resistor R16, the source of the MOSFET Q4 and the second end of the resistor R16 are grounded, the drain of the MOSFET Q4 and the anode of the diode D2 are connected to the first motor connection terminal of the motor control circuit 8, and the cathode of the diode D2 is connected to the second motor connection terminal of the motor control circuit 8. The control terminal of the motor control circuit 8 is connected to the third port of the main control circuit 2, and the first and second motor connection terminals of the motor control circuit 8 are connected to the gas pumping device 4. When the third port of the main control circuit 2 outputs a high-level signal, the MOSFET Q4 is turned on, causing the gas pumping device 4 to work. When the third port of the main control circuit 2 outputs a low-level signal, the MOSFET Q4 is turned off, causing the gas pumping device 4 to stop working. At this time, the diode D2 can dissipate the reverse electromotive force generated by the gas pumping device 4. The structure of the gas pumping device 4 is existing technology. Here, the structure of the gas pumping device 4 is briefly described. The gas pumping device 4 generally includes a gas chamber set in the housing 1, a fan set in the gas chamber, and a motor that drives the fan. The motor is connected to the first motor connection terminal and the second motor connection terminal of the motor control circuit 8, as well as the output terminal of the DC conversion circuit. The housing 1 is provided with an air inlet 102 and an air outlet 103 that communicate with the gas chamber. The air inlet 102 and the lamp cover 101 can be located at the two ends of the housing 1, respectively, and the air outlet 103 is located on the side of the housing 1.

[0050] In an embodiment of this utility model, the DC-DC converter circuit 7 includes diode D1, diode D3, inductor L2, capacitor C6, capacitor C7, and DC-DC chip U2. The DC-DC chip U2 can be of model XT1861. The anodes of diode D3 and D1 are connected to the first and second input terminals of the DC-DC converter circuit 7, respectively. The cathodes of diode D3 and D1, and the first terminal of capacitor C1 are connected to the first terminal of inductor L2. The second terminal of inductor L2A is connected to the LX pin of DC-DC chip U2. The VOUT pin of DC-DC chip U2 and the first terminal of capacitor C6 are connected to the output terminal of DC-DC converter circuit 7. The GND pin of DC-DC chip U2, the second terminal of capacitor C6, and the second terminal of capacitor C7 are grounded.

[0051] In an embodiment of this utility model, the input detection circuit 11 includes a resistor R2 and a resistor R5. The first end of the resistor R2 is connected to the input terminal of the input detection circuit 11, the second end of the resistor R2 and the first end of the resistor R5 are connected to the output terminal of the input detection circuit 11, and the second end of the resistor R5 is grounded. The input terminal of the input detection circuit 11 is connected to the output terminal of the DC input circuit 5, and the output terminal of the input detection circuit 11 is connected to the fourth port of the main control circuit 2.

[0052] In an embodiment of this utility model, the DC input circuit 5 has a power input interface J1, which can be a TYPE-C interface; the housing 1 is provided with a clearance opening 104 corresponding to the power input interface J1, and the clearance opening 104 is fitted with a protective plug 105; in addition, the housing 1 can be provided with a key cap 106 corresponding to the key switch SW1 to protect the key switch SW1, and the key cap 106 and the protective plug 105 can be integrally set, and the protective plug 105 can rotate relative to the key cap 106.

[0053] In an embodiment of this utility model, the main control circuit 2 adopts a microcontroller circuit, which may include a microcontroller chip U3, and the model of the microcontroller chip U3 may be SC8F6770.

[0054] In an embodiment of this utility model, the outer side of the housing 1 may be provided with a connecting part 107, the connecting part 107 is provided with a connecting hole 1071, the connecting hole 1071 can be used to connect mounting parts (such as hooks, ropes) and the multifunctional micro air pump of this utility model can be installed on a backpack, suitcase or other position through the mounting parts.

[0055] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A multifunctional miniature air pump, comprising a housing and a main control circuit, a power supply battery, and a gas pumping device disposed within the housing; characterized in that: It also includes a DC input circuit, a battery charging circuit, a DC-DC converter circuit, a motor control circuit, a lighting circuit, a command input circuit, an input detection circuit, and a battery switch circuit, all housed within the casing. The output of the DC input circuit is connected to the input of the battery charging circuit and the first input of the DC-DC converter circuit. The output of the battery charging circuit is connected to the power supply battery, which is connected to the second input of the DC-DC converter circuit via the battery switch circuit. The output of the DC-DC converter circuit supplies power to the main control circuit, the lighting circuit, and the gas pumping device. The main control circuit is connected to the battery switch circuit, the lighting circuit, the command input circuit, and the motor control circuit, respectively. The main control circuit is connected to the DC input circuit via the input detection circuit, and the motor control circuit is connected to the gas pumping device. A lampshade is provided on the casing corresponding to the lighting circuit.

2. The multifunctional micro air pump as described in claim 1, characterized in that: The input terminal of the battery switch circuit is connected to the positive terminal of the power supply battery, the output terminal of the battery switch circuit is connected to the second input terminal of the DC-DC converter circuit, the control terminal of the battery switch circuit is connected to the output terminal of the battery switch circuit through a self-locking circuit, and the control terminal of the battery switch circuit is connected to the first port of the main control circuit; the power supply terminal of the command input circuit is connected to the positive terminal of the power supply battery, and the output terminal of the command input circuit is connected to the first port of the main control circuit and the control terminal of the battery switch circuit.

3. The multifunctional micro air pump as described in claim 2, characterized in that: The battery switch circuit includes a resistor R11, a transistor Q6, and a MOSFET Q3; the first end of the resistor R11 and the source of the MOSFET Q3 are connected to the input terminal of the battery switch circuit, the drain of the MOSFET Q3 is connected to the output terminal of the battery switch circuit, the gate of the MOSFET Q3 and the second end of the resistor R11 are connected to the collector of the transistor Q6, the base of the transistor Q6 is connected to the control terminal of the battery switch circuit, and the emitter of the transistor Q6 is grounded.

4. The multifunctional micro air pump as described in claim 2, characterized in that: The self-locking circuit includes resistors R12 and R19. The first end of resistor R12 is connected to the output terminal of the battery switch circuit, the second end of resistor R12 and the first end of resistor R19 are connected to the control terminal of the battery switch circuit, and the second end of resistor R19 is grounded.

5. The multifunctional micro air pump as described in claim 2, characterized in that: The first port of the main control circuit is connected to the switch terminal of the battery charging circuit through diode D5. The positive terminal of diode D5 is connected to the first port of the main control circuit, and the negative terminal of diode D5 is connected to the switch terminal of the battery charging circuit. The voltage at the switch terminal of the battery charging circuit controls whether the battery charging circuit works.

6. The multifunctional micro air pump as described in claim 5, characterized in that: The battery charging circuit includes resistors R3, R4, R8, R9, R20, R23, and R25, inductor L1, diode D6, MOSFET Q1, transistor Q2, charging control chip U1, full charge indicator LED71, and charging indicator LED72. The source of MOSFET Q1, the first terminal of resistor R3, the first terminal of resistor R20, and the first terminal of resistor R23 are connected to the input terminal of the battery charging circuit. The gate of MOSFET Q1 and the second terminal of resistor R3 are connected to the collector of transistor Q2. The base of transistor Q2 is connected to the first terminals of resistor R8 and R9. The emitter of transistor Q2 and the second terminal of resistor R8 are grounded. The second terminal of resistor R9 is connected to the cathode of diode D6 and is also connected to the switch terminal of the battery charging circuit. The anode of diode Q6 is connected to the cathode of charging indicator LED72 and the first terminal of resistor R25. The anode of charging indicator LED72 is connected to the input terminal of the battery charging circuit. The second terminal of resistor R23 is connected to the positive terminal of the fully charged indicator LED71, which is connected to the second terminal of resistor R20. The CHRG and DONE pins of the charging control chip U1 are connected to the negative terminal of the fully charged indicator LED71 and the second terminal of resistor R25, respectively. The NTC and GND pins of the charging control chip U1 are grounded. The VIN pin of the charging control chip U1 is connected to the drain of MOSFET Q1. The LX pin of the charging control chip U1 is connected to the first terminal of inductor L1. The BATT pin of the charging control chip U1 and the first terminal of resistor R4 are connected to the output terminal of the battery charging circuit. The CSP pin of the charging control chip U1 is connected to the second terminal of resistor R4 and the second terminal of inductor L1.

7. The multifunctional micro air pump as described in claim 1 or 2, characterized in that: The command input circuit includes a resistor R10 and a push-button switch SW1; the first end of the resistor R10 is connected to the power supply terminal of the command input circuit, the second end of the resistor R10 is connected to the first end of the push-button switch SW1, and the second end of the push-button switch SW1 is connected to the output terminal of the command input circuit; the power supply terminal of the command input circuit is connected to the positive terminal of the power supply battery, and the output terminal of the command input circuit is connected to the first port of the main control circuit.

8. The multifunctional micro air pump as described in claim 1, characterized in that: It also includes a battery undervoltage detection circuit installed in the housing. The input of the battery undervoltage detection circuit is connected to the output of the battery switch circuit, and the output of the battery undervoltage detection circuit is connected to the second port of the main control circuit. The battery undervoltage detection circuit includes resistors R13 and R18. The first end of resistor R13 is connected to the input terminal of the battery undervoltage detection circuit, the second end of resistor R13 and the first end of resistor R18 are connected to the output terminal of the battery undervoltage detection circuit, and the second end of resistor R18 is grounded.

9. The multifunctional micro air pump as described in claim 1, characterized in that: The lighting circuit includes a lighting switch circuit and an LED lamp circuit. The positive terminal of the LED lamp circuit is connected to the power supply terminal of the lighting circuit, the negative terminal of the LED lamp circuit is connected to the input terminal of the lighting switch circuit, the output terminal of the lighting switch circuit is grounded, and the control terminal of the lighting switch circuit is connected to the second port of the main control circuit.

10. The multifunctional micro air pump as described in claim 1, characterized in that: The motor control circuit includes resistor R14, resistor R16, MOSFET Q4, and diode D2. The first end of resistor R14 is connected to the control terminal of the motor control circuit. The second end of resistor R14 is connected to the gate of MOSFET Q4 and the first end of resistor R16. The source of MOSFET Q4 and the second end of resistor R16 are grounded. The drain of MOSFET Q4 and the anode of diode D2 are connected to the first motor connection terminal of the motor control circuit. The cathode of diode D2 is connected to the second motor connection terminal of the motor control circuit. The control terminal of the motor control circuit is connected to the third port of the main control circuit, and the first motor connection terminal and the second motor connection terminal of the motor control circuit are connected to the gas pumping device.

11. The multifunctional micro air pump as described in claim 1, characterized in that: The DC-DC converter circuit includes diode D1, diode D3, inductor L2, capacitor C6, capacitor C7, and DC-DC chip U2; The anodes of diodes D3 and D1 are connected to the first and second input terminals of the DC-DC converter circuit, respectively. The cathodes of diodes D3 and D1, and the first terminal of capacitor C1 are connected to the first terminal of inductor L2. The second terminal of inductor L2A is connected to the LX pin of DC-DC chip U2. The VOUT pin of DC-DC chip U2 and the first terminal of capacitor C6 are connected to the output terminal of the DC-DC converter circuit. The GND pin of DC-DC chip U2, the second terminal of capacitor C6, and the second terminal of capacitor C7 are grounded.

12. The multifunctional micro air pump as described in claim 1, characterized in that: The input detection circuit includes resistors R2 and R5. The first end of resistor R2 is connected to the input terminal of the input detection circuit, and the second end of resistor R2 and the first end of resistor R5 are connected to the output terminal of the input detection circuit. The second end of resistor R5 is grounded. The input terminal of the input detection circuit is connected to the output terminal of the DC input circuit, and the output terminal of the input detection circuit is connected to the fourth port of the main control circuit.

13. The multifunctional micro air pump as described in claim 1, characterized in that: The DC input circuit has a power input interface J1; the housing is provided with a clearance opening corresponding to the power input interface J1, and the clearance opening is fitted with a protective plug.

14. The multifunctional micro air pump as described in claim 1, characterized in that: The outer side of the housing is provided with a connecting part, and the connecting part is provided with a connecting hole.

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