A multifunctional power adapter device

Abstract

A multifunctional power adapter device includes a power supply module, a voltage adapter module, and an adapter connector; the power supply module is a mobile phone power bank or a mobile phone charger; the input end of the voltage adapter module is connected to the output end of the power supply module, and the 5V voltage output by the power supply module is converted by the voltage adapter module to obtain a voltage that needs to replace a battery pack or a voltage for charging various rechargeable batteries; one end of the adapter connector is connected to the output end of the voltage adapter module, and the other end of the adapter connector is connected to a device that receives electric energy, specifically, it can be connected to the original battery box of the instrument to replace the battery pack, it can be connected to the rechargeable battery box to charge the rechargeable battery, and it can also be connected to the DC power socket of the instrument to replace the original power supply of the instrument. It is simple to install, convenient and practical.

Description

Technical Field

[0001] The invention relates to a power adapter device, in particular to a multifunctional power adapter device. Background Art

[0002] At present, the functions of the power chargers and mobile power banks we have for charging mobile phones are relatively simple, and they generally serve to charge mobile phones. In our daily lives, we have many instruments and equipment that use batteries as power sources, such as 1 to 4 commonly used No. 1, No. 5, No. 7 and No. 9 batteries, as well as other types of batteries. Instruments and equipment that use batteries as power sources include remote controls, electronic scales, game controllers, gas stoves, multimeters, laptops, etc. There are the following problems in actual use: 1. The batteries are placed in the battery box of the instrument and equipment for a long time. After a period of use, the batteries will be out of power. If they are not used for a long time, the batteries will self-discharge and fail, causing waste and not environmentally friendly. Some will rot inside, causing damage to the instrument and equipment. 2. Spare various batteries is also a relatively troublesome thing, and they will fail over time. 3. If rechargeable batteries are used, chargers of various specifications will also be required to adapt to different types of batteries, and rechargeable batteries will also fail over time. 4. Sometimes we will encounter situations where we are eager to use a certain instrument and equipment, but the battery inside is out of power and there is no available battery around, which affects the use of the instrument and equipment. For example, the No. 1 battery commonly used in gas stoves, if the power of the No. 1 battery in the gas stove is insufficient, it will cause the ignition to fail, affecting cooking. Summary of the invention

[0003] In order to avoid the situation that when we use the commonly used No. 1, No. 5, No. 7, No. 9 batteries and other types of batteries as power sources for instruments and equipment in most occasions, the failure of the batteries inside affects our use. Here, a multifunctional power adapter is invented. It uses the easily available mobile phone power bank (also known as mobile phone power bank) or mobile phone charger as the power source. It can replace 1 to 4 commonly used No. 1, No. 5, No. 7, No. 9 batteries, or other types of batteries used in most instruments and equipment. If it does not need to be moved at any time in a large range and the appearance requirements are not high, the multifunctional power adapter can also be used for a long time. It is more convenient to use, lower cost, and more environmentally friendly. With external battery boxes of different specifications, various rechargeable batteries can also be charged. Its adapter connector can be conveniently and directly connected to the original battery box of the instrument and equipment, which is simple to install, convenient and practical. With one machine in hand, most battery applications and charging occasions can be handled.

[0004] The technical solution adopted by the present invention to solve its technical problems: it includes a power supply module, a voltage adapter module, and an adapter connector; the power supply module is a mobile phone power bank or a mobile phone charger; the input end of the voltage adapter module is connected to the output end of the power supply module, and the 5V voltage output by the power supply module is converted by the voltage adapter module to obtain the voltage required to replace the battery pack or the voltage for charging various rechargeable batteries; one end of the adapter connector is connected to the output end of the voltage adapter module, and the other end of the adapter connector is connected to a device for receiving electric energy, specifically, it can be connected to the original battery box of the instrument to replace the battery pack, it can be connected to the rechargeable battery box to charge the rechargeable battery, and it can also be connected to the DC power socket of the instrument to replace the original power supply of the instrument.

[0005] The adapter connector can be selected from one of the following situations according to the needs of realizing the function: 1. Adapter connector A; 2. Adapter connector B; 3. Adapter connector C; Adapter connector A includes wire A, wire B, two-core connection plug A, battery box positive connector, and battery box negative connector. One end of wire A is connected to the positive pole of two-core connection plug A, and the other end is connected to the positive connector of the battery box. One end of wire B is connected to the negative pole of two-core connection plug A, and the other end is connected to the negative connector of the battery box. Adapter connector A is inserted into the output socket of the voltage adapter module through the two-core connection plug A to connect with the voltage adapter module; the positive connector of the battery box and the negative connector of the battery box are used in pairs. You can select one of the following situations according to your needs: 1. The positive connector of the battery box is a small copper cap, which can be put on the small cylinder at the head of the positive electrode of the battery. Wire A is connected to the small copper cap, and the negative connector of the battery box is a round copper sheet with one side insulated. One end of wire B is connected to the round copper sheet, and the diameter of the round copper sheet is equal to or slightly smaller than the diameter of the battery; 2. The positive connector of the battery box is a small copper cap with a small plastic cap for insulation inside. The small plastic cap can be put on the small cylinder at the head of the positive electrode of the battery. One end of wire A is connected to the small copper cap, and the negative connector of the battery box is a round copper sheet, one end of wire B is connected to the round copper sheet, and the diameter of the round copper sheet is equal to or slightly smaller than the diameter of the battery; 3. The positive connector of the battery box and the negative connector of the battery box are the connection caps of a No. 9 battery. The positive connector of the battery box is a cylindrical object, and the negative connector of the battery box is an equilateral hexagonal cylinder object; the USB plug of the voltage adapter module is connected by inserting it into the USB socket of the power supply module, the positive output terminal of the power supply module is connected to the positive input terminal of the voltage adapter module, and the negative GND of the power supply module is connected to the negative GND of the voltage adapter module;

[0006] The adapter connector B includes a wire C, a wire D, a two-core connection plug B, and a rechargeable battery adapter. One end of the wire C is connected to the positive pole of the two-core connection plug B, and the other end is connected to the positive pole of the rechargeable battery adapter. One end of the wire D is connected to the negative pole of the two-core connection plug B, and the other end is connected to the negative pole of the rechargeable battery adapter. The rechargeable battery adapter can be one of the following depending on the rechargeable battery: 1. It is a battery box of No. 1, No. 5, and No. 7, 2. It is a connection cap of No. 9 battery, 3. Button battery box, 4. Mobile phone battery charging clip suitable for mobile phone battery board; the two-core connection plug B is connected to the voltage adapter module by inserting it into the output socket of the voltage adapter module;

[0007] One end of the adapter connector C has a two-core connection plug A that can be connected to the output port of the voltage adapter module, and the other end of the adapter connector C is connected to a DC power plug, which can be connected to the power socket of the instrument to replace the original power supply of the instrument; specifically, one end of the adapter connector C is a DC power plug that can be connected to the power socket of a laptop computer, or a DC power plug that can be connected to the power socket of a radio.

[0008] As a further solution of the technical solution: the voltage adapter module is composed of a USB plug U6, a single-chip computer module U1, a key input module U2, a display module U3, a DC-DC boost module U7, a pulse width modulation (PWM) drive module U8, a filter module U4 and an output current and voltage detection circuit. The positive pole of the voltage adapter module is the positive pole of the USB plug U6 and is connected to the VCC of the single-chip computer module U1; the key input module U2, the display module U3 and the single-chip computer module U1 are connected, and the negative pole of the voltage adapter module and the negative pole of the USB plug U6 are connected to the GND of the single-chip computer module U1; the input terminal of the DC-DC boost module U7 is connected to VCC, The output end of the DC-DC boost module U7 is connected to the input end of the pulse width modulation (PWM) drive module U8. When the single-chip computer module U1 is used to control the output voltage of the DC-DC boost module U7, the DC-DC boost module U7 and the single-chip computer module U1 are connected. When the single-chip computer module U1 is used not to control the output voltage of the DC-DC boost module U7, the DC-DC boost module U7 and the single-chip computer module U1 are not connected. The input end of the pulse width modulation (PWM) drive module U8 is connected to the output end of the DC-DC boost module U7. The output end of the pulse width modulation (PWM) drive module U8 is connected to the input end of the filter module U4. The single-chip computer module and the pulse width modulation ( The positive pole of the output terminal of the filter module U4 is connected to the positive pole of the output socket U5, and the negative pole of the filter module U4 is connected to GND; the output current and voltage detection circuit is: the positive pole of the output socket U5 is connected to an analog detection input interface A of the single-chip module, which is used to detect the output voltage of the voltage adapter module, and the negative pole of the output socket U5 is connected to an analog detection input interface B of the single-chip module, and is connected to GND through a current detection resistor R2, which is used to detect the output current; the filter module U4 can be an electronic filter, such as an inductive π filter; if the output voltage is less than 5V, the DC-DC boost module U7 can be omitted.

[0009] As a further solution of the technical solution: the DC-DC boost module U7 and the pulse width modulation (PWM) drive module U8 of the voltage adapter module can have multiple specific solutions, wherein in solution 1, the DC-DC boost module U7 is omitted when the output voltage is less than 5V, and VCC is connected to the input end of the pulse width modulation (PWM) drive module U8; the pulse width modulation (PWM) drive module U8 is composed of a PNP transistor Q1 and a resistor R1; an output end of the single-chip microcomputer module is connected to the base of the PNP transistor Q1 through the resistor R1, and the pulse width modulation (PWM) pulse signal generated by the single-chip microcomputer module controls the switch of Q1 through the base of Q1, and the emitter of the PNP transistor Q1 is also the input end of the pulse width modulation (PWM) drive module U8 connected to VCC, and the collector of the PNP transistor Q1 is connected to the input end of the filter module U4;

[0010] Solution 2: VCC is connected to the input end of the DC-DC boost module U7, and the output end of the DC-DC boost module U7 is connected to the input end of the pulse width modulation (PWM) drive module U8. The DC-DC boost module U7 is not connected to the single-chip module; the pulse width modulation (PWM) drive module U8 consists of a PNP transistor Q1, an NPN transistor Q2, and two resistors R1 and R3; one output end of the single-chip module is connected to the base of the NPN transistor Q2 through the resistor R1, and the emitter of the transistor Q2 is connected to GND, The collector of transistor Q2 is connected to the base of PNP transistor Q1 through resistor R3, the emitter of PNP transistor Q1 is also the input end of pulse width modulation (PWM) driving module connected to the output end of DC-DC boost module U7, the collector of PNP transistor Q1 is connected to the input end of filter module U4, pulse width modulation (PWM) driving module U8 may also include resistor R4, one end of R4 is connected to the emitter of PNP transistor Q1, and the other end is connected to the base of PNP transistor Q1; the voltage adaptation range of the above scheme 2 is based on the output voltage of DC-DC boost module, if the output voltage of DC-DC boost module is 12V, it is suitable for applications less than 12V;

[0011] In a further solution of the second solution, the single-chip microcomputer module is connected to an electronic potentiometer, which replaces the output voltage regulating resistor in the DC-DC boost module. Common DC-DC boost modules have output voltage regulating resistors. In this way, the output voltage of the DC-DC boost module can be adjusted by the single-chip microcomputer control, making the voltage regulation more accurate and more efficient.

[0012] Another further solution of the second solution is: adding a switch selection circuit module between the DC-DC boost module and VCC, the switch selection circuit module is composed of two PNP transistors Q3, Q4, two resistors R5, R6, and two diodes D1, D2; a control terminal B of the single-chip microcomputer module is connected to the base of the PNP transistor Q3 through the resistor R5, the emitter of the PNP transistor Q3 is connected to VCC, the collector of the PNP transistor Q3 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the input end of the pulse width modulation (PWM) drive module; a control terminal C of the single-chip microcomputer module is connected to the base of the PNP transistor Q4 through the resistor R6, The emitter of NP transistor Q4 is connected to VCC, the collector of PNP transistor Q4 is connected to the input end of DC-DC boost module, the output end of DC-DC boost module is connected to the anode of diode D2, and the cathode of diode D2 is connected to the input end of pulse width modulation (PWM) drive module; D1 and D2 are preferably Schottky diodes with small voltage drop; when the replaced battery pack voltage and the rechargeable battery voltage are less than or equal to 4.7V, the control terminal B of the single-chip module is low level, and the control terminal C of the single-chip module is high level; when the replaced battery pack voltage and the rechargeable battery voltage are greater than 4.7V, the control terminal B of the single-chip module is high level, and the control terminal C of the single-chip module is low level;

[0013] Solution 3: VCC is connected to the input of the DC-DC boost module U7, and the output of the DC-DC boost module is connected to the input of the pulse width modulation (PWM) drive module; the DC-DC boost module U7 is composed of an inductor L1, an N-channel field effect transistor Q3, a Schottky diode D1, a capacitor C1 and a resistor R7. One end of the inductor L1 is connected to VCC, and the other end is connected to the drain D of Q3, and is connected to the anode of the diode D1. The cathode of the diode D1 is connected to the positive electrode of the capacitor C1, and is also connected to the input end of the pulse width modulation (PWM) drive module. The gate G of the N-channel field effect transistor Q3 is connected to a pulse width modulation (PWM) output end of the single-chip module through the resistor R7. The pulse signal of this port can control the switch of the N-channel field effect transistor Q3. The inductor L1 will generate a voltage higher than VCC and charge C1 to generate a voltage from VCC to a voltage higher than VCC. The source S of the N-channel field effect transistor Q3 and the negative electrode of the capacitor C1 are grounded; the pulse width modulation (PWM) drive module consists of a PNP transistor Q1, an NPN transistor Q2, and two resistors R1 and R3; a pulse width modulation (PWM) output end of the single-chip module is connected to the base of the NPN transistor Q2 through the resistor R1, and the emitter of the transistor Q2 is connected to GND. The collector of transistor Q2 is connected to the base of PNP transistor Q1 through resistor R3, the emitter of PNP transistor Q1 is also the input end of pulse width modulation (PWM) drive module connected to the output end of DC-DC boost module U7, the collector of PNP transistor Q1 is connected to the input end of filter module U4, pulse width modulation (PWM) drive module U8 may also include resistor R4, one end of R4 is connected to the emitter of PNP transistor Q1, and the other end is connected to the base of PNP transistor Q1; the voltage adaptation range of the above voltage adaptation module scheme three is based on the output voltage of the DC-DC boost module. If the output voltage of the DC-DC boost module is 12V, it is suitable for applications less than 12V.

[0014] The principle of the voltage adapter module is: first, the single-chip microcomputer generates a pulse with a certain duty cycle at the control end connected to the pulse width modulation (PWM) drive module, controls the pulse width modulation (PWM) drive module, and generates different voltage outputs at the output end of the pulse width modulation (PWM) drive module, and then filters through the filter module to obtain a stable voltage. Then the single-chip microcomputer further adjusts the duty cycle of the pulse by monitoring the voltage and current at the output end of the voltage adapter module, so that the output voltage and current meet the requirements. Due to the ever-changing electronic circuits, the above are just a few of the solutions. In addition, the triode can also be replaced by a field effect tube, and the circuit may be slightly modified.

[0015] As a further solution of the technical solution: the display module in voltage adaptation module solution one and voltage adaptation module solution two consists of an LED digital tube and several LED light-emitting tubes. The LED digital tube is used to display the output voltage and current value; the several LED light-emitting tubes are used to indicate the current status; the key input module consists of several keys, through which function selection, output voltage value setting and operation confirmation can be performed.

[0016] As a further solution of the technical solution: the mobile phone battery charging clamp includes a positioning box, a support plate, a support spring, and two groups of mobile phone battery contact pieces, each group of 2; the positioning box is a rectangular box with an empty front and left side, and a support plate is provided at the bottom of the positioning box. The front of the support plate is inserted into two semi-cylindrical holes parallel to the bottom of the positioning box and the small circular shafts through the small circular shafts at both ends, and can rotate. There is a support spring between the back of the rear of the support plate and the bottom of the positioning box, so that when the mobile phone battery plate is inserted into the positioning box, it can be tightly positioned. The top surface of the box is clamped by the support plate, and there is a long strip hole near the rear of the upper baffle of the positioning box and a long strip hole near the upper part of the rear baffle of the positioning box. The fixing screw of the mobile phone board contact can pass from the inside to the outside; each set of mobile phone board contact is composed of two mobile phone board contact, and the mobile phone board contact includes a small plate and a hand-screwed fixing nut. There is a thin strip of metal contact spring on the back of the small plate, which is in the shape of a spoon. The protruding part of the spoon is on the outside and is used to contact the contact of the mobile phone board. There is a fixing screw on the small board, which can be passed from the bottom of the upper baffle of the positioning box upward through the long strip hole near the rear of the upper baffle of the positioning box and the long strip hole near the top of the rear baffle of the positioning box, and fixed by hand-screwing the fixing nut; the fixing screws of the first group of two mobile phone board contact parts are passed from the bottom of the upper baffle of the positioning box upward through the long strip hole near the rear of the upper baffle of the positioning box, and fixed by hand-screwing the fixing nut, connected to the metal contact springs above through wires and respectively connected to the two-core connection plug B of the adapter connector B The positive and negative poles are connected, which is suitable for mobile phone circuit boards with contacts on the upper or lower surfaces; the fixing screws of the second group of two mobile phone circuit board contacts pass through the rear baffle of the positioning box from the inside to the outside, close to the upper long strip hole, and are fixed by hand-screwing the fixing nut. The metal contact springs on the wire connection are respectively connected to the positive and negative poles of the two-core connection plug B of the adapter connector B, which is suitable for mobile phone circuit boards with contacts on the front or rear sides. These two situations basically cover most mobile phone circuit boards on the market. Install one of the groups according to needs.

[0017] The second scheme of the contact piece of the mobile phone circuit board contact point can be composed of a contact piece metal needle, a contact piece cylinder, a contact piece cylinder cover, a contact piece spring, and a hand-tightening fixing nut; there is a small round hole at the bottom of the contact piece cylinder, through which the needle part of the contact piece metal needle can pass; the contact piece metal needle is an object with a disc fixed at the tail of a metal needle, the needle is in the center of the disc and passes through a point, and the disc can slide in the contact piece cylinder; the contact piece spring is pressed on the disc at the tail of the contact piece metal needle; the contact piece cylinder cover is covered on the large round hole of the contact piece cylinder to prevent the contact piece spring from coming out, and there is a fixing screw at the center of the outer side of the contact piece cylinder cover, which can pass through the long strip hole near the rear of the upper baffle of the positioning box and the long strip hole near the upper part of the rear baffle of the positioning box from the bottom of the upper baffle of the positioning box, and is fixed by a hand-tightening fixing nut; when the head contact piece metal needle and the mobile phone circuit board contact point are pressed in, the action of the spring inside will have a rebound force.

[0018] As a further solution of the technical solution: the two groups of mobile phone board contacts of the mobile phone battery charging clamp, each group of 2, each group of mobile phone board contacts can be connected to the positive and negative poles of a USB plug cable respectively, the USB plug is inserted into the USB socket of the mobile phone charger, the mobile phone board is plugged in, and the mobile phone charger can be charged after power is turned on.

[0019] How to use this multi-function power adapter:

[0020] Steps:

[0021] 1. Plug the voltage adapter module into a mobile phone power bank or a powered mobile phone charger, and start running the program after powering on.

[0022] 2. In the setting state, use the function selection button of the key module and the LED display status of the display module to select the required function: replace the battery pack or use it as a battery charger;

[0023] 3. If the function selected is to replace the battery pack:

[0024] 3.1 Then use the voltage adjustment button on the key module to set the voltage of the battery pack to be replaced. One battery is about 1.2-1.5V, two batteries are about 2.4-3V, three batteries are about 3.6-4.5V, and four batteries can be replaced with 5V.

[0025] 3.2 Connect the positive connector of the battery box to the positive pole of the battery box on the device, and connect the negative connector of the battery box to the negative pole of the battery box on the device; if the batteries on the device are No. 1, No. 5, or No. 7 batteries, the positive connector of the battery box can be covered with a small copper cap on the small cylinder at the head of the positive pole of an old battery, and the negative connector of the battery box uses the copper surface of an insulating round copper sheet to contact the negative pole of the battery box. Put the other old batteries into the battery box according to their original positions; if the battery on the device is No. 9 battery, the positive connector of the battery box and the negative connector of the battery box are a No. 9 battery connector cap, the positive connector of the battery box is a cylindrical object, and the negative connector of the battery box is an equilateral hexagonal cylinder object connected to the No. 9 battery connector cap in the device.

[0026] 3.3 The two-core connecting plug A of the adapter connector A is inserted into the output socket of the voltage adapter module and connected to the voltage adapter module.

[0027] 3.4 Press the Run button to start powering the device.

[0028] 4. If the function is selected as a battery charger:

[0029] 4.1 Use the voltage adjustment button on the key module to set the battery pack voltage to be charged.

[0030] 4.2 Select the rechargeable battery adapter according to the type of rechargeable battery, and connect the rechargeable battery and

[0031] Rechargeable battery adapter connection:

[0032] Place No. 1, No. 5, and No. 7 rechargeable batteries into the appropriate No. 1, No. 5, and No. 7 battery boxes;

[0033] 9# rechargeable battery connects to the 9# battery connector;

[0034] The rechargeable button battery is placed in a button battery box of the same specifications;

[0035] Insert the mobile phone battery board into the mobile phone battery charging clip, and if the mobile phone battery board contacts are on the upper surface of the board, make the metal contact springs or contact metal needles on the first group of mobile phone battery board contacts contact pieces contact with the positive contact and negative contact on the mobile phone respectively, and an indicator light will be on after good contact; if the mobile phone battery board contacts are on the front or rear side of the board, make the metal contact springs or contact metal needles on the second group of mobile phone battery board contacts contact pieces contact with the positive contact and negative contact on the mobile phone respectively, and an indicator light will be on after good contact.

[0036] 4.3 Insert adapter connector B into the output socket of the voltage adapter module.

[0037] 4.4 Press the Run button to start charging the rechargeable battery.

[0038] The beneficial effects of the present invention are as follows: One set of inventions can achieve the following: 1. When the batteries in most instruments and equipment that use No. 1, No. 5, No. 7, or even No. 9 batteries as power sources are out of power, and when the batteries in some other instruments and equipment are out of power, the batteries inside can be replaced in an emergency, which does not affect our use, is more environmentally friendly, and can be used for a long time in occasions where the appearance requirements are not high. 2. It can charge No. 1, No. 5, No. 7 rechargeable batteries, even No. 9 rechargeable batteries, most mobile phone boards, and button rechargeable batteries. 3. It can reduce the demand for batteries, because batteries can pollute the environment, so it is more environmentally friendly. 4. The use cost is lower and more convenient, avoiding the need to look for the required batteries everywhere. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0040] Figure 1 It is a schematic diagram of the technical solution of the present invention.

[0041] Figure 2 It is a principle block diagram of the voltage adaptation module scheme 1 of the present invention.

[0042] Figure 3 It is a principle block diagram of the second scheme of the voltage adaptation module of the present invention.

[0043] Figure 4 It is a principle block diagram of scheme 3 of the voltage adaptation module of the present invention.

[0044] Figure 5 It is a schematic diagram of a mobile phone battery charging clip in the present invention.

[0045] Figure 6 It is a top view and a left schematic view of a thin strip of metal contact spring on the back of a contact plate of a mobile phone electric board contact contact member in the present invention.

[0046] Figure 7 The present invention is a schematic diagram of a front fixing screw and a hand-twisted fixing nut of a contact plate of a mobile phone electric plate contact point contact member.

[0047] Figure 8 It is a schematic diagram of a mobile phone battery charging clamp support plate in the present invention.

[0048] Fig. 9 It is a front view of the ejector contact of the mobile phone battery charging clamp in the present invention.

[0049] Fig.10 yes Fig. 9 AA cross-section diagram.

[0050] Fig.11 It is a principle block diagram of the single chip microcomputer module U1 of the voltage adaption module of the present invention controlling the output voltage of the DC-DC boost module U7.

[0051] Fig.12 It is a principle block diagram of the single chip microcomputer module U1 of the voltage adaptation module of the present invention not controlling the output voltage of the DC-DC boost module U7.

[0052] In the figure, 1. Power supply module, 2. Voltage adapter module, 3. Two-core connection plug A, 4. Wire A, 5. Small copper cap, 6. Small plastic cap, 7. Round copper sheet, 8. Wire B, 9. Two-core connection plug B, 10. Wire C, 11. Wire D, 12. Battery box, 13. USB port of power supply module, 14. USB plug of voltage adapter module, 16. 9V battery connection cap, 17. Output port of voltage adapter module, 18. Adapter connector A, 19. Adapter connector B, 21. No. 1, 5, 7 batteries, 25. Mobile phone battery charging clip, 26. Bottom support plate of mobile phone battery charging clip positioning box, 27. Support spring between the back of the mobile phone battery charging clip support plate and the bottom of the box, 28. The upper baffle of the mobile phone battery charging clip positioning box is close to the long strip hole at the back, 29. The rear baffle of the mobile phone battery charging clamp positioning box is close to the upper long strip hole, 30. Mobile phone board contact contact piece 1, 31. Mobile phone board contact contact piece 2, 32. Mobile phone board contact contact piece 3, 33. Mobile phone board contact contact piece 4, 34. Contact plate hand-tightening fixing nut, 35. Fixing screw on the contact plate, 36. Metal contact spring on the back of the mobile phone board contact contact piece, 38. The front of the mobile phone battery charging clamp positioning box, 39. The left side of the mobile phone battery charging clamp positioning box, 41. The connection cap of the No. 9 battery, the positive connection piece of the battery box, the equilateral hexagonal cylindrical object, 42. The connection cap of the No. 9 battery, the negative connection piece of the battery box, the cylindrical object, 43. The metal needle of the contact piece, 44. The cylinder of the contact piece, 45. The tail disc of the metal needle of the contact piece, 46. The spring of the contact piece, 47. The cylinder cover of the contact piece, 48. The external fixing screw of the contact cylinder cover, 49. The lead wire of the contact metal needle, 50. The small round hole at the bottom of the contact cylinder, 51. The adapter connector C, 52. The DC power plug of the adapter connector C. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0054] Embodiment 1: Using the voltage adapter module of the present invention, the voltage adapter module scheme 2 is adopted. This embodiment has multiple functions:

[0055] 1. Replace two D-type batteries in a gas stove that uses two D-type batteries as power source.

[0056] 2. Replace the AA battery in a multimeter that uses one AA battery.

[0057] 3. Use a power bank with sufficient output power to power the laptop.

[0058] 4. Charge a D-type rechargeable battery.

[0059] 5. Charge one AA rechargeable battery.

[0060] 6. Charge a 2032 button cell battery.

[0061] 7. Charge a cell phone battery with the battery contacts on the front side.

[0062] Figure 1 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 As shown,

[0063] Embodiment 1

[0064] It includes a power supply module 1, a voltage adapter module 2, an adapter connector A 18, an adapter connector B 19, and an adapter connector C 51; the power supply module 1 is a mobile phone power bank or a mobile phone charger; the adapter connector A 18 includes a wire A 4, a wire B 8, a two-core connecting plug A 3, a battery box positive connector 5, and a battery box negative connector 7, one end of the wire A 4 is connected to the positive pole of the two-core connecting plug A 3, and the other end is connected to the battery box positive connector 5, one end of the wire B 8 is connected to the negative pole of the two-core connecting plug A 3, and the other end is connected to the battery box negative connector 7, the adapter connector A 18 is inserted into the output socket 17 of the voltage adapter module 2 through the two-core connecting plug A 3 and connected to the voltage adapter module 2; the battery box positive connector 5 and the battery box negative connector 7 are used in pairs, and different batteries can be replaced as needed, and the following options are selected: 1. Replace the No. 1 battery, The positive connector 5 of the battery box is a small copper cap, which can be put on the small cylinder at the head of the positive pole of the No. 1 battery. The wire A 4 is connected to the small copper cap, and the negative connector 7 of the battery box is a round copper sheet with one side insulated. One end of the wire B 8 is connected to the round copper sheet, and the diameter of the round copper sheet is equal to or slightly smaller than the diameter of the battery; 2. Replace the No. 9 battery, the positive connector and the negative connector of the battery box are a connection cap 16 of a No. 9 battery, the positive connector of the battery box is a cylindrical object 42, and the negative connector of the battery box is an equilateral hexagonal cylindrical object 41; the USB plug of the voltage adapter module 14 is connected by inserting it into the USB socket 13 of the power supply module 1, the positive output terminal of the power supply module 1 is connected to the positive input terminal of the voltage adapter module 2, and the negative GND of the power supply module 1 is connected to the negative GND of the voltage adapter module 2; the adapter connector B 19 includes the wire C 10, the wire D 11, the two-core connecting plug B 9, the rechargeable battery adapter 12, the wire C One end of the wire 10 is connected to the positive pole of the two-core connection plug B 9, and the other end is connected to the positive pole of the rechargeable battery adapter 12. One end of the wire D 11 is connected to the negative pole of the two-core connection plug B 9, and the other end is connected to the negative pole of the rechargeable battery adapter 12. One end of the adapter connector C 51 has a two-core connection plug A 3 that can be connected to the output port of the voltage adapter module, and the other end of the adapter connector C 51 is connected to a DC power plug, specifically a DC power plug that can be connected to the power socket of a laptop computer. The rechargeable battery adapter is selected according to the different rechargeable batteries. One of the following situations: 1. It is a No. 1 battery box, which charges the No. 1 rechargeable battery; 2. It is a connection cap for No. 9 batteries, the positive pole of the rechargeable battery adapter 12 is an equilateral hexagonal cylinder 41, and the negative pole of the rechargeable battery adapter 12 is a cylindrical object 42; 3. A 2032 button battery box, which charges the 2032 rechargeable battery; 4.A mobile phone battery charging clip 25 for charging a mobile phone battery panel; a two-core connection plug B 9 is connected to a voltage adapter module 2 by inserting the output socket 17 of the voltage adapter module 2; the 5V voltage output by the power supply module 1 is converted by the voltage adapter module 2 to obtain a voltage that needs to be matched with the replacement battery pack and a voltage for charging various rechargeable batteries.

[0065] The voltage adaptation module of the first embodiment adopts the voltage adaptation module scheme 2, see Figure 3 , The voltage adapter module is composed of a USB plug U6, a single-chip computer module U1, a key input module U2, a display module U3, a DC-DC boost module U7, a pulse width modulation (PWM) drive module U8, a filter module U4 and an output current and voltage detection circuit; the display module U3 is composed of a 4-digit LED digital tube and 4 LED light-emitting tubes. The LED digital tube is used to display the output voltage and current value; the 4 LED light-emitting tubes are used to indicate the current state, which are: 1. Replace the battery pack, 2. Charge, 3. The LED digital tube displays the voltage, and 4. The LED digital tube displays the current; the key input module is composed of 4-way keys, which are respectively used for key 1. Function selection. When setting the state, press it in combination with the state display LED to select whether to replace the battery pack or charge; key 2. When running, combined with the state display LED, you can choose whether the LED digital tube displays the voltage or the current. It is a confirmation key when setting the state. After the voltage is set, press the confirmation key to enter the running state. Key 3. When setting the state, set the output voltage value to increase. Key 4. When setting the state, set the output voltage value to decrease.

[0066] The microcontroller program can be run like this when it is set: press button 1, LED1 lights up, indicating the battery pack replacement function, press button 1 again, LED2 lights up, indicating the charging function, press button 2 to confirm, and adjust the output voltage after selecting the function. At this time, press button 3 to increase the set voltage value, and the digital tube numbers will increase at the same time. Press button 4 to decrease the set voltage value, and the digital tube numbers will decrease at the same time, until the required value is set, and then press button 2 to confirm and enter the running state. The running state program will adjust the output voltage to the voltage value required for replacing the battery pack or charging.

[0067] Press button 2 to view the output voltage and current when the microcontroller program is running.

[0068] The positive pole of the voltage adapter module is the positive pole of the USB plug U6 and is connected to the VCC of the single-chip computer module U1, and is also connected to the input end of the DC-DC boost module U7. The output end of the DC-DC boost module U7 is connected to the input end of the pulse width modulation (PWM) drive module; the key input module U2, the display module U3 and the single-chip computer module U1 are connected, and the negative pole of the voltage adapter module and the negative pole of the USB plug U6 are connected to the GND of the single-chip computer module U1; the pulse width modulation (PWM) drive module consists of a PNP transistor Q1, an NPN transistor Q2, and two resistors R1, R3, and R4; the filter module U4 uses an inductor π-type filter, and one output end of the single-chip computer module is connected to the base of the NPN transistor Q2 through the resistor R1, and the emitter of the transistor Q2 is connected to GND, The collector of transistor Q2 is connected to the base of PNP transistor Q1 through resistor R3. The emitter of PNP transistor Q1 is also the input end of pulse width modulation (PWM) drive module connected to the output end of DC-DC boost module U7. The collector of PNP transistor Q1 is connected to the input end of inductor π-type filter U4. The output end of inductor π-type filter U4 is connected to an analog detection input interface A of microcontroller module U1. One end of R4 is connected to the emitter of PNP transistor Q1, and the other end is connected to the base of PNP transistor Q1. The output end of inductor π-type filter U4 and GND are connected to the output socket U5 of voltage adapter module. The output current and voltage detection circuit is: the positive pole of output socket U5 is connected to the input end of microcontroller module U4. An analog detection input interface A of the block is used to detect the output voltage of the voltage adapter module. The negative pole of the output socket U5 is connected to an analog detection input interface B of the microcontroller module, and is connected to GND through a current detection resistor R2 to detect the output current; the microcontroller outputs a pulse with a certain duty cycle at the control end of the pulse width modulation (PWM) drive module to control the pulse width modulation (PWM) drive module. Different voltage outputs can be generated at the output end of the pulse width modulation (PWM) drive module. After filtering by the filter U4, the microcontroller further adjusts the duty cycle of the pulse by detecting the voltage and current at the output end of the voltage adapter module, so that the output voltage and current meet the requirements.

[0069] The mobile phone battery charging clamp of the first embodiment includes a positioning box 25, a support plate 26, a support spring 27, and two groups of mobile phone board contact pieces, each group of 2; the positioning box 25 is a rectangular box with an empty front part 38 and a left side part 39, and a support plate 26 is provided at the bottom of the positioning box. The front of the support plate is inserted into the semi-cylindrical hole 44 parallel to the bottom of the positioning box and the small round shaft through the small round shafts 43 at both ends, and can rotate. There is a support spring 27 between the back of the rear of the support plate and the bottom of the positioning box. When the mobile phone battery board is inserted into the positioning box, it can be clamped against the top surface of the positioning box by the support plate. There is a long strip hole 28 near the rear of the upper baffle of the positioning box and a long strip hole 29 near the top of the rear baffle of the positioning box. The fixing screw 35 of the mobile phone board contact piece can pass through from the inside to the outside; each group of mobile phone board contact pieces consists of The mobile phone circuit board contact piece is composed of two mobile phone circuit board contact pieces. The mobile phone circuit board contact piece is a small plate with a thin strip of metal contact spring 37 on the right side of the back. The shape is spoon-shaped, and the spoon-shaped protruding part is close to the outside, which is used to contact the contact of the mobile phone circuit board. There is a fixing screw 35 on the small plate, which can pass through the long strip hole 28 near the rear of the upper baffle of the positioning box and the long strip hole 29 near the upper part of the rear baffle of the positioning box from the bottom of the upper baffle of the positioning box, and is fixed by hand-screwing the fixing nut 34; now select one of the groups, this group of two mobile phone circuit board contact pieces 32, 33 can pass through the long strip hole 29 near the upper part of the rear baffle of the positioning box from the inside to the outside, and be fixed by hand-screwing the fixing nut, and the metal contact springs on the wire connection are respectively connected to the positive and negative poles of the two-core connection plug B of the adapter connector B.

[0070] Steps:

[0071] Replace 2 D-cell batteries or AA batteries or power a laptop:

[0072] 1. Plug the voltage adapter module into a mobile phone power bank or a powered mobile phone charger, the program starts running and enters the setting state.

[0073] 2. In the setting state, use the function selection button of the key module to select the required function: replace the battery pack function. After the function setting is completed, press the confirmation button.

[0074] 3. In the setting state

[0075] 3.1 Use the voltage setting button on the key module to set the voltage of the battery pack to be replaced. Now replace two No. 1 batteries with 3V and one No. 9 battery with 9V to power the laptop (the voltage is determined according to the specific laptop). Press the confirm button after the setting is completed.

[0076] 3.2 Connect the positive connector of the battery box to the positive terminal of the battery box on the device, and connect the negative connector of the battery box to the negative terminal of the battery box on the device; the battery on the gas stove is a No. 1 battery, and the positive connector of the battery box uses a small copper cap 5, which is put on the small cylinder at the positive head of an old No. 1 battery. The negative connector of the battery box is a round copper sheet with one side insulated, and the copper surface of the round copper sheet is in contact with the negative terminal of the battery box of the gas stove. Put the other old batteries into the battery box according to their original positions; the battery on the multimeter is a No. 9 battery, and the positive connector and negative connector of the battery box are a No. 9 battery connector cap, the positive connector of the battery box is a cylindrical object, and the negative connector of the battery box is an equilateral hexagonal tube object connected to the No. 9 battery connector cap in the multimeter; plug the DC power plug of the adapter connector C 51 into the power socket of the laptop.

[0077] 3.3 Insert the two-core connection plug A of the adapter connector A or the adapter connector C into the output socket of the voltage adapter module and connect it to the voltage adapter module.

[0078] 3.4 Press the Run button to start powering the device.

[0079] When used as a charger, the function selection is as a battery charger:

[0080] 1. Plug the voltage adapter module into a mobile phone power bank or a powered mobile phone charger, the program starts running and enters the setting state.

[0081] 2. In the setting state, use the function selection button of the key module to select the required function: charge the rechargeable battery, and press the confirmation button after the function setting is completed.

[0082] 2.1 Use the button module to set the voltage of the No. 1 rechargeable battery to be charged, which is 1.5V. The No. 9 rechargeable battery is 9V. The button battery 2032 is 3V. The mobile phone battery board is 4.2V.

[0083] 2.2 Insert adapter connector B into the output socket of the voltage adapter module.

[0084] 2.3 Connect the rechargeable battery to the rechargeable battery adapter, such as:

[0085] Place the No. 1 rechargeable battery into the appropriate No. 1 battery box;

[0086] 9-cell rechargeable battery is connected to the connection cap of 9-cell battery;

[0087] Put the rechargeable button battery 2032 into the 2032 button battery box;

[0088] Insert the mobile phone battery board into the mobile phone battery charging clip, and the mobile phone battery board contacts are on the front side of the battery board. Make the metal contact springs on the mobile phone battery board contact pieces 32, 33 contact the positive contact and negative contact on the mobile phone respectively. When the contact is good, an indicator light will light up.

[0089] 2.4 Press the Run button to start charging the rechargeable battery.

[0090] The principles and design features of the invention can be understood through the above drawings and descriptions. The invention has the characteristics of multiple functions, simple installation, low cost, practicality and reliability. Of course, the above embodiment is only to illustrate one of the technical concepts and features of the invention, and its purpose is to enable people familiar with this technology to understand the content of the invention and implement it accordingly, and it cannot be used to limit the protection scope of the invention. Any modifications made according to the spirit of the main technical solution of the invention should be covered within the protection scope of the invention.

Claims

1. A multifunctional power adapter device, characterized in that: It includes a power supply module, a voltage adapter module, and an adapter connector; the power supply module is a mobile phone power bank or a mobile phone charger; the input end of the voltage adapter module is connected to the output end of the power supply module, and the 5V voltage output by the power supply module is converted by the voltage adapter module to obtain a voltage that needs to replace the battery pack or a voltage for charging various rechargeable batteries; one end of the adapter connector is connected to the output end of the voltage adapter module, and the other end of the adapter connector is connected to a device that receives electrical energy, specifically, it can be connected to the original battery box of the instrument to replace the battery pack, it can be connected to the rechargeable battery box to charge the rechargeable battery, and it can also be connected to the DC power socket of the instrument to replace the original power supply of the instrument; The adapter connector is selected from one of the following cases according to the need to realize the function:

1. Adapter connector A; 2. Adapter connector B; 3. Adapter connector C; Adapter connector A includes wire A, wire B, two-core connection plug A, battery box positive connector, and battery box negative connector. One end of wire A is connected to the positive pole of two-core connection plug A, and the other end is connected to the positive connector of the battery box. One end of wire B is connected to the negative pole of two-core connection plug A, and the other end is connected to the negative connector of the battery box. Adapter connector A is inserted into the output socket of the voltage adapter module through the two-core connection plug A and connected to the voltage adapter module; the positive connector of the battery box and the negative connector of the battery box are used in pairs, and one of the following cases can be selected according to the need:

1. The positive connector of the battery box is a small copper cap, which can be put on the small cylinder at the head of the positive electrode of the battery. Wire A is connected to the small copper cap, and the negative connector of the battery box is a round copper sheet with one side insulated. One end of wire B is connected to the round copper sheet, and the diameter of the round copper sheet is equal to or slightly smaller than the diameter of the battery; 2. The positive connector of the battery box is a small copper cap with a small plastic cap for insulation inside. The small plastic cap can be put on the small cylinder at the head of the positive electrode of the battery. One end of wire A is connected to the small copper cap, and the negative connector of the battery box is a round copper sheet, one end of wire B is connected to the round copper sheet, and the diameter of the round copper sheet is equal to or slightly smaller than the diameter of the battery; 3. The positive connector of the battery box and the negative connector of the battery box are the connection caps of a No. 9 battery. The positive connector of the battery box is a cylindrical object, and the negative connector of the battery box is an equilateral hexagonal cylinder object; the USB plug of the voltage adapter module is connected by inserting it into the USB socket of the power supply module, the positive output terminal of the power supply module is connected to the positive input terminal of the voltage adapter module, and the negative GND of the power supply module is connected to the negative GND of the voltage adapter module; the adapter connector B includes wire C, wire D, two-core connection plug B, and a rechargeable battery adapter. One end of wire C is connected to the positive pole of the two-core connection plug B, and the other end is connected to the positive pole of the rechargeable battery adapter. One end of wire D is connected to the negative pole of the two-core connection plug B, and the other end is connected to the negative pole of the rechargeable battery adapter. The rechargeable battery adapter can be one of the following depending on the rechargeable battery:

1. It is a No. 1, No. 5, or No. 7 battery box, 2. It is a connection cap of a No. 9 battery, 3. Button battery box, 4. A mobile phone battery charging clip suitable for mobile phone battery panels; the two-core connection plug B is connected to the voltage adapter module by inserting it into the output socket of the voltage adapter module; one end of the adapter connector C has a two-core connection plug A that can be connected to the output port of the voltage adapter module, and the other end of the adapter connector C is connected to a DC power plug, which can be connected to the power socket of the instrument to replace the original power supply of the instrument; The voltage adapter module is composed of a USB plug U6, a single-chip computer module U1, a key input module U2, a display module U3, a DC-DC boost module U7, a pulse width modulation (PWM) drive module U8, a filter module U4 and an output current and voltage detection circuit. The positive pole of the voltage adapter module is the positive pole of the USB plug U6 and is connected to the VCC of the single-chip computer module U1; the key input module U2, the display module U3 and the single-chip computer module U1 are connected, and the negative pole of the voltage adapter module and the negative pole of the USB plug U6 are connected to the GND of the single-chip computer module U1; the input terminal of the DC-DC boost module U7 is connected to VCC, The output of the DC-DC boost module U7 is connected to the input of the pulse width modulation (PWM) drive module U8. When the single-chip microcomputer module U1 is used to control the output voltage of the DC-DC boost module U7, the DC-DC boost module U7 and the single-chip microcomputer module U1 are connected. When the single-chip microcomputer module U1 is used not to control the output voltage of the DC-DC boost module U7, the DC-DC boost module U7 and the single-chip microcomputer module U1 are not connected. The input of the pulse width modulation (PWM) drive module U8 is connected to the output of the DC-DC boost module U7. The output of the pulse width modulation (PWM) drive module U8 is connected to the input of the filter module U4. The control end of the single-chip microcomputer module and the pulse width modulation (PWM) driving module U8 are connected; the positive pole of the output end of the filter module U4 is connected to the positive pole of the output socket U5, and the negative pole of the filter module U4 is connected to GND; the output current and voltage detection circuit is: the positive pole of the output socket U5 is connected to an analog detection input interface A of the single-chip microcomputer module, which is used to detect the output voltage of the voltage adapter module, and the negative pole of the output socket U5 is connected to an analog detection input interface B of the single-chip microcomputer module, and is connected to GND through a current detection resistor R2, which is used to detect the output current; if the output voltage is less than 5V, the DC-DC boost module U7 can be omitted; The DC-DC boost module U7 and pulse width modulation (PWM) drive module U8 are one of the following solutions. Solution 1: Suitable for applications with an output voltage less than 5V, the DC-DC boost module U7 is omitted, and VCC is connected to the input end of the pulse width modulation (PWM) drive module U8; the pulse width modulation (PWM) drive module U8 consists of a PNP transistor Q1 and a resistor R1; an output end of the single-chip microcomputer module is connected to the base of the PNP transistor Q1 through the resistor R1, and the pulse width modulation (PWM) pulse signal generated by the single-chip microcomputer module controls the switch of Q1 through the base of Q1. The emitter of the PNP transistor Q1 is also the input end of the pulse width modulation (PWM) drive module U8 connected to VCC, and the collector of the PNP transistor Q1 is connected to the filter module The input end of U4; Option 2: VCC is connected to the input end of the DC-DC boost module U7, and the output end of the DC-DC boost module U7 is connected to the input end of the pulse width modulation (PWM) drive module U8. The DC-DC boost module U7 is not connected to the single-chip module; the pulse width modulation (PWM) drive module U8 consists of a PNP transistor Q1, an NPN transistor Q2, and two resistors R1 and R3; one output end of the single-chip module is connected to the base of the NPN transistor Q2 through the resistor R1, and the emitter of the transistor Q2 is connected to GND, The collector of transistor Q2 is connected to the base of PNP transistor Q1 through resistor R3. The emitter of PNP transistor Q1 is also the input end of pulse width modulation (PWM) driving module connected to the output end of DC-DC boost module U7. The collector of PNP transistor Q1 is connected to the input end of filter module U4. Pulse width modulation (PWM) driving module U8 can also include resistor R4. One end of R4 is connected to the emitter of PNP transistor Q1, and the other end is connected to the base of PNP transistor Q1. The voltage adaptation range of the above-mentioned scheme 2 is based on the output voltage of DC-DC boost module. If the output voltage of DC-DC boost module is 12V, it is suitable for applications less than 12V. Scheme 3: VCC is connected to the input end of DC-DC boost module U7, and the output end of DC-DC boost module is connected to the input end of pulse width modulation (PWM) driving module. DC-DC boost module U7 is composed of inductor L1, N-channel field effect transistor Q3, Schottky diode D1, capacitor C1 and resistor R7. One end of the inductor L1 is connected to VCC, and the other end is connected to the drain D of Q3 and the anode of the diode D1. The cathode of the diode D1 is connected to the positive electrode of the capacitor C1 and the input end of the pulse width modulation (PWM) drive module. The gate G of the N-channel field effect transistor Q3 is connected to a pulse width modulation (PWM) output end of the single-chip module through the resistor R7. The source S of the N-channel field effect transistor Q3 and the negative electrode of the capacitor C1 are grounded. The pulse width modulation (PWM) drive module consists of a PNP transistor Q1, an NPN transistor Q2, and two resistors R1 and R3.A pulse width modulation (PWM) output end of the single-chip module is connected to the base of the NPN transistor Q2 through the resistor R1, the emitter of the transistor Q2 is connected to GND, the collector of the transistor Q2 is connected to the base of the PNP transistor Q1 through the resistor R3, the emitter of the PNP transistor Q1 is also the input end of the pulse width modulation (PWM) drive module connected to the output end of the DC-DC boost module U7, the collector of the PNP transistor Q1 is connected to the input end of the filter module U4, and the pulse width modulation (PWM) drive module U8 can also include a resistor R4, one end of R4 is connected to the emitter of the PNP transistor Q1, and the other end is connected to the base of the PNP transistor Q1. ; 2. The multifunctional power adapter device according to claim 1, characterized in that: A further solution of the second scheme of the DC-DC boost module U7 and the pulse width modulation (PWM) drive module U8 is as follows: a switch selection circuit module is added between the DC-DC boost module and VCC, and the switch selection circuit module is composed of two PNP transistors Q3, Q4, two resistors R5, R6, and two diodes D1, D2; a control terminal B of the single-chip computer module is connected to the base of the PNP transistor Q3 through the resistor R5, the emitter of the PNP transistor Q3 is connected to VCC, the collector of the PNP transistor Q3 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the input end of the pulse width modulation (PWM) drive module; a control terminal C of the single-chip computer module is connected to the base of the PNP transistor Q4 through the resistor R6, the emitter of the PNP transistor Q4 is connected to VCC, the collector of the PNP transistor Q4 is connected to the input end of the DC-DC boost module, the output end of the DC-DC boost module is connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the input end of the pulse width modulation (PWM) drive module.

3. The multifunctional power adapter device according to claim 1, characterized in that: A further solution of the second scheme of the DC-DC boost module U7 and the pulse width modulation (PWM) drive module U8 is that the single-chip microcomputer module is connected to an electronic potentiometer, which replaces the output voltage regulating resistor in the DC-DC boost module.

4. The multifunctional power adapter device according to claim 1, characterized in that: The display module is composed of an LED digital tube and a plurality of LED light-emitting tubes. The LED digital tube is used to display the output voltage and current value; the plurality of LED light-emitting tubes are used to indicate the current state; and the key input module is composed of a plurality of keys.

5. The multifunctional power adapter device according to claim 1, characterized in that: The mobile phone battery charging clip comprises a positioning box, a support plate, a support spring, and two groups of mobile phone battery contact pieces, each group having two pieces; The positioning box is a rectangular box with an empty front and left side. There is a support plate at the bottom of the positioning box. The front of the support plate is inserted into the two semi-cylindrical holes in the bottom of the positioning box and parallel to the small circular shafts through the small circular shafts at both ends, and can rotate. There is a support spring between the back of the support plate and the bottom of the positioning box. When the mobile phone battery board is inserted into the positioning box, it can be clamped against the top surface of the positioning box by the support plate. There is a long strip hole near the rear of the upper baffle of the positioning box and a long strip hole near the top of the rear baffle of the positioning box. The fixing screw of the mobile phone battery board contact can pass through from the inside to the outside; each group of mobile phone battery board contact contacts consists of two mobile phone battery board contact contacts, and the mobile phone battery board contact contacts include a small plate and a hand-screwed fixing nut. There is a thin strip of metal contact spring on the back of the small plate, which is spoon-shaped. The protruding part of the spoon is outside and is used to contact with the contacts of the mobile phone battery board. The small plate There is a fixing screw on the top, which can pass through the long strip hole near the rear of the upper baffle of the positioning box and the long strip hole near the top of the rear baffle of the positioning box from the bottom of the upper baffle of the positioning box, and be fixed by hand-screwing the fixing nut; the fixing screws of the first group of two mobile phone board contact contact pieces pass through the long strip hole near the rear of the upper baffle of the positioning box from the bottom of the upper baffle of the positioning box, and are fixed by hand-screwing the fixing nut, and the metal contact springs on the top are connected by wires and are respectively connected to the positive and negative poles of the two-core connecting plug B of the adapter connector B, which is suitable for mobile phone board contacts on the upper or lower surface; the fixing screws of the second group of two mobile phone board contact contact pieces pass through the long strip hole near the upper rear baffle of the positioning box from the inside to the outside, and are fixed by hand-screwing the fixing nut, and the metal contact springs on the top are connected by wires and are respectively connected to the positive and negative poles of the two-core connecting plug B of the adapter connector B, which is suitable for mobile phone board contacts on the front or rear sides.

6. The multifunctional power adapter device according to claim 5, characterized in that: The mobile phone board contact piece can also be composed of a contact piece metal needle, a contact piece cylinder, a contact piece cylinder cover, a contact piece spring, and a hand-twisted fixing nut; there is a small round hole at the bottom of the contact piece cylinder, through which the needle part of the contact piece metal needle can pass; the contact piece metal needle is an object with a disc fixed at the tail of a metal needle, the needle is in the center of the disc and passes through a point, and the disc can slide in the contact piece cylinder; the contact piece spring is pressed on the disc at the tail of the contact piece metal needle; the contact piece cylinder cover is covered on the large round hole of the contact piece cylinder to prevent the contact piece spring from coming out, and there is a fixing screw at the center of the outer side of the contact piece cylinder cover, which can pass through the long strip hole near the rear of the upper baffle of the positioning box and the long strip hole near the upper part of the rear baffle of the positioning box from the bottom of the upper baffle of the positioning box, and is fixed by a hand-twisted fixing nut; when the head contact piece metal needle and the mobile phone board contact are pressed in, the action of the spring inside will have a rebound force.

7. The multifunctional power adapter device according to claim 5, characterized in that: The mobile phone battery charging clamp has two groups of mobile phone board contact pieces, each group has 2 pieces, and each group of mobile phone board contact pieces can be connected to the positive and negative poles of a USB plug cable respectively. The USB plug is inserted into the USB socket of the mobile phone charger, and the mobile phone board is plugged in. The mobile phone charger can be charged after being powered on.

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