Power supply detector

Abstract

The utility model discloses a power supply detector, and relates to the technical field of detectors, the two sides of the top of a detector housing are symmetrically provided with guide grooves, the interiors of the plurality of guide grooves are connected with limiting rods in an attached manner, the tops of the plurality of limiting rods are fixedly connected with a dustproof cover plate, the bottom ends of the plurality of limiting rods are fixedly connected with limiting sliding sheets, and the limiting sliding sheets are fixedly connected with the dustproof cover plate. The tops of the inner sides of the bottom ends of the multiple limiting sliding pieces are symmetrically and fixedly connected with reset springs. The bottom ends of the limiting rods are limited through the guide grooves in the two sides of the top of the detector shell, and the two sides of the detector shell are covered and shielded by sliding the dustproof cover plate after equipment is used, so that the situation that a detection result is influenced by dirty and mess in a socket due to long-time use is avoided; the alternating current adjusting knob is rotated, one end of the linkage connection rotor rotates on the inner side of the resistor disc, the numerical value of the voltage display screen is changed, the alternating current input interface is adjusted to be not communicated with or electrified with the connection line and the outer ring connection plate, and numerical value errors during detection of other types of power supplies are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of detectors, and more particularly to a power supply detector. Background Art

[0002] In a linear power supply circuit, the DC voltage output by the rectifier and filter circuit is a key detection point. When there is no voltage or the voltage is abnormal at the output end, a multimeter can be used to detect whether the DC voltage output by the rectifier and filter circuit is normal. The normal voltage here is a key condition for the normal output voltage of the subsequent stage. The power supply circuit detection requires the use of a circuit tester to detect the output voltage, current, power, internal resistance, maximum output power and other parameters of the power supply under different conditions of voltage change, frequency change, and load change to determine the performance of the power supply under test.

[0003] Chinese utility model patent application number CN202222249484.6 discloses a portable power circuit tester comprising a tester body, test leads, a protective pad, a chassis, a scraper, and a blower. A display screen is embedded and fixed to the front surface of the tester body, and a fixing bracket is welded to the outer end face of one side of the tester body. Velcro is sewn onto the inner wall of the fixing bracket, and the fixing bracket is attached to the protective pad via the Velcro and Velcro strips. A plug-in bracket is welded to the outer end face of the tester body, and the plug-in bracket has a through slot formed inside, into which the test leads are inserted. This portable power circuit tester is difficult to open and close in actual use, has poor dustproofing, and is prone to measurement errors due to dust accumulation when exposed to the outside for long periods of time. Furthermore, the device cannot adjust voltage, current, and resistance during use, making it difficult to control and disconnect the internal circuit of the tester. This makes it inconvenient to use, thereby reducing the performance judgment of the power supply under test.

[0004] Therefore, it is necessary to propose a power supply detector to solve the above problems. Utility Model Content

[0005] (1) Technical problems solved

[0006] The purpose of the present utility model is to solve the problem that a portable power circuit tester is difficult to close and open during actual use, has a poor dustproof effect, is easily exposed to the outside for a long time and causes measurement errors due to dust accumulation, and the device cannot adjust the voltage, current and resistance during use, which makes it difficult to regulate and cut off the internal circuit of the tester and is inconvenient to use, thereby reducing the performance judgment of the power supply to be tested. The present utility model provides a power supply tester.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A power supply detector, wherein guide grooves are symmetrically provided on both sides of the top of the detector shell, and a plurality of limit rods are fittedly connected to the inside of the guide grooves, and a plurality of dust cover plates are fixedly connected to the top of the limit rods, and a plurality of limit slides are fixedly connected to the bottom ends of the limit slides, and a plurality of return springs are symmetrically fixedly connected to the top inner side of the bottom ends of the limit slides, and the tops of the plurality of return springs are fixedly connected to the inner top of the detector shell, and a main control board is provided at the inner middle end of the detector shell, and a resistor is fixedly connected to one side of the top of the main control board, and an AC adjustment knob is rotatably installed on the top of the outer surface of one side of the detector shell.

[0010] Furthermore, one end of the AC power adjustment knob passes through the detector housing and is provided with a connecting rotor, the outer surface of one end of the connecting rotor is fitly connected to the inner surface of the resistor, and the outer surface of the detector housing is provided with a voltage display screen on one side of the AC power adjustment knob.

[0011] Furthermore, an AC switch knob is provided on the outer surface of the detector housing at the bottom end of the AC adjustment knob, and a positioning cylinder is fixedly connected to the inner wall of the detector housing at one side of the AC switch knob.

[0012] Furthermore, a traction spring is provided at the inner top of the positioning cylinder, the bottom end of the traction spring is fixedly connected to the inner end of the AC switch knob, and one end of the AC switch knob passes through the positioning cylinder and is fixedly connected to a semicircular connector.

[0013] Furthermore, an AC input interface is provided on the outer surface of the detector shell on one side of the AC switch knob, and an outer ring connecting plate is provided on the inner outside of the detector shell. One end of the AC input interface is fixedly connected to a connecting wire, and one end of the connecting wire passes through the positioning tube and is fitted and connected to the outer surface of one end of the AC switch knob.

[0014] Furthermore, a stereoscopic positioning connecting rod is fixedly connected to one side of the outer surface of the outer ring connecting plate, the top outer surface of the stereoscopic positioning connecting rod is fitly connected to the bottom of the semicircular connecting piece, an extension interface is provided on the side of the AC input interface away from the AC switch knob, and an AC output port is provided on the side of the extension interface away from the AC input interface.

[0015] Furthermore, a current input port to be measured is provided on one side of the bottom of the detector shell, a current switch to be measured is provided on the side of the bottom of the detector shell away from the current input port to be measured, a duty cycle adjustment switch is provided on one side of the detector shell at the top of the current switch to be measured, a variable power resistor is provided on the top of one side of the main control board, and one end of the duty cycle adjustment switch passes through the detector shell and is connected to the inner outer surface of the variable power resistor.

[0016] Furthermore, a voltmeter selection knob and an ammeter selection knob are symmetrically provided in the middle of one side of the detector housing, and a voltage and current meter dial is symmetrically provided on the side of the detector housing away from the current switch to be measured. One end of the voltmeter selection knob and the ammeter selection knob passes through the detector housing and is provided with a fan-shaped connector. The inner sides of multiple voltage and current meter dials pass through the detector housing and are connected to a switching circuit, and the outer surface of one side of the fan-shaped connector is respectively fitted and connected to one end of the switching circuit.

[0017] Furthermore, the current switch to be measured, one end of the current switch to be measured passes through the detector housing and is provided with an arc-shaped disk, the bottom end of the arc-shaped disk is fitted with a U-shaped rod, the bottom ends of the U-shaped rod pass through the detector housing and are located on the outside of the bottom of the detector housing, and the middle bottom end of the U-shaped rod is fitted with a high-elasticity block.

[0018] Furthermore, the bottom of the high-elasticity block is fixedly connected to the inner wall of the detector housing, the inner side of the current input port to be measured passes through the detector housing and is symmetrically fixedly connected with an arc interface, and the top of the U-shaped rod is symmetrically provided with a docking block with the arc interface.

[0019] (3) Beneficial effects

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. The utility model limits the bottom end of the limit rod through the guide grooves on both sides of the top of the detector shell, so that the reset spring pushes the limit slide to move in the guide groove. After the equipment is used, the dust cover is slid to cover the two sides of the detector shell to block it, so as to avoid the mess in the socket caused by long-term use affecting the test results. The AC adjustment knob is rotated to connect one end of the rotating piece to rotate on the inner side of the resistor to change the value of the voltage display screen, so that the semicircular connecting piece at one end of the inner side of the AC switch knob is rotated and fits with the top side of the stereo positioning connecting rod. The traction spring pushes the AC switch knob to move outward, so that the AC input interface is disconnected from the connecting line and the outer ring plate and is not powered, thereby avoiding numerical errors when detecting other types of power supplies.

[0022] 2. The utility model supplies power to the main control board through the working power socket, rotates the AC switch knob to feed 200V AC into the AC input interface, and reads it through the voltage display screen, plugs the power supply to be tested into the AC output port, connects the output end of the power supply to be tested to the current input port to be tested, and rotates the duty cycle adjustment switch so that one end of the duty cycle adjustment switch rotates inside the variable power resistor, uses a small resistor and a high-power resistor as negative numbers, changes the duty cycle, and thus can change the equivalent resistance of the load connected to the power supply to be tested, and rotates the voltmeter selection knob and the ammeter selection knob to select the switching line to switch voltage and ammeters of different sizes under the rotation of multiple fan-shaped contacts, and measures the current resistance through the voltage and ammeter dial, which is convenient for calculating the power, so that the output current, voltage, power, internal resistance and maximum output power parameters of the power supply to be tested can be measured under different AC input conditions and different loads.

[0023] 3. The utility model rotates the current switch to be measured to rotate the arc disk, so that the bottom of one end of the arc disk squeezes the U-shaped rod downward to squeeze and contract the high-elastic block, prompting the arc interface to separate from the docking block, thereby cutting off the input current to be measured. The power supply line is connected to one end of the U-shaped rod. When the U-shaped rod contacts the arc interface, multiple current switches to be measured are restored to connection. By setting an extended interface, when the device does not input 220V AC, 12V DC can be input here instead, which facilitates multiple measurements to determine the performance of the power supply to be measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a three-dimensional bottom view schematic diagram of the structure of the utility model;

[0026] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the structure of the utility model;

[0027] Figure 4 It is a three-dimensional side cross-sectional schematic diagram of the structure of the utility model;

[0028] Figure 5 It is a three-dimensional bottom-view cross-sectional schematic diagram of the structure of the utility model;

[0029] Figure 6 For this utility model Figure 5 A magnified schematic diagram of the structure of area A in the middle.

[0030] Reference numerals: 1, detector housing; 2, guide groove; 3, limit rod; 4, dust cover; 5, limit slide; 6, return spring; 7, main control board; 8, resistor; 9, connecting rotor; 10, AC adjustment knob; 11, voltage display; 12, voltmeter selection knob; 13, AC switch knob; 14, positioning cylinder; 15, traction spring; 16, semicircular connector; 17, AC input interface; 18, outer ring connector; 19, connecting wire; 20. Stereoscopic positioning rod; 21. Working power socket; 22. Expansion interface; 23. AC output port; 24. Measured current input port; 25. Duty cycle adjustment switch; 26. Measured current switch; 27. Ammeter selection knob; 28. Voltage and current meter dial; 29. Fan-shaped connector; 30. Switching line; 31. Power supply line; 32. Arc disk; 33. U-shaped rod; 34. Arc interface; 35. Variable power resistor; 36. High elasticity block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0032] Please refer to Figure 1-6, a power supply detector, including guide grooves 2 symmetrically provided on both sides of the top of the detector housing 1, a plurality of guide grooves 2 are internally fitted and connected to limit rods 3, a plurality of limit rods 3 are fixedly connected to the tops of dust covers 4, the detector housing 1 is provided with equidistantly arranged heat dissipation holes at the top inner side of the dust cover 4, which is convenient for discharging heat when the equipment is working, a plurality of limit rods 3 are fixedly connected to the bottom ends of the limit slides 5, one end of the limit slide 5 is adapted to the guide groove 2, and is symmetrically arranged, a plurality of limit slides 5 are symmetrically fixedly connected to the inner top of the bottom end of the plurality of limit slides 5, a storage groove adapted to the reset spring 6 is provided at the inner top of the detector housing 1, and the tops of the plurality of reset springs 6 and the inner The top is fixedly connected, and a main control board 7 is provided at the middle end of the interior of the detector housing 1. A chip control module is provided in the main control board 7 for sending control signals. The frequency and duty cycle of the control signal are adjustable. A field effect tube is used as a switch tube, and a resistor is used as a load to change the duty cycle. A resistor 8 is fixedly connected to one side of the top of the main control board 7. An AC power adjustment knob 10 is rotatably installed on the top of the outer surface of one side of the detector housing 1. One end of the AC power adjustment knob 10 passes through the detector housing 1 and is provided with a connecting rotor 9. The resistor 8 is spoon-shaped, which is convenient for changing the resistance size as the connecting rotor 9 rotates. The outer surface of one end of the connecting rotor 9 is fitted with the inner surface of the resistor 8. The outer surface of the detector housing 1 is located on one side of the AC power adjustment knob 10. A voltage display screen 11 is provided, which is used to display the voltage adjusted by the AC adjustment knob 10 in real time. An AC switch knob 13 is provided on the outer surface of the detector housing 1 at the bottom end of the AC adjustment knob 10. A positioning cylinder 14 is fixedly connected to the inner top end of the AC switch knob 13 on one side of the inner wall of the detector housing 1. A traction spring 15 is provided on the inner top end of the positioning cylinder 14. The top end of the traction spring 15 and the inner top end of the positioning cylinder 14 are rotatably installed. When the AC switch knob 13 rotates, the AC switch knob 13 will not rotate with it. The bottom end of the traction spring 15 is fixedly connected to one end of the inner side of the AC switch knob 13. One end of the AC switch knob 13 passes through the positioning cylinder 14 and is fixedly connected to a semicircular connector. The semicircular connecting piece 16 will not contact the top of the stereo positioning connecting rod 20 after rotating one hundred and eighty degrees, and will be away from one end of the stereo positioning connecting rod 20 under the action of the traction spring 15. The outer surface of the detector housing 1 is located on one side of the AC switch knob 13 and is provided with an AC input interface 17. The AC input interface 17 is located on the inner and outer sides of the detector housing 1 and is provided with an outer ring connecting plate 18. One end of the AC input interface 17 is fixedly connected to a connecting wire 19. One end of the connecting wire 19 passes through the positioning cylinder 14 and is fitted and connected to the outer surface of one end of the AC switch knob 13. One side of the outer surface of the outer ring connecting plate 18 is fixedly connected to the stereo positioning connecting rod 20. The outer surface of the top of the stereo positioning connecting rod 20 is fitted and connected to the bottom of the semicircular connecting piece 16.The AC switch knob 13, the semicircular connector 16, the AC input interface 17, the outer ring connector 18 and the stereo positioning rod 20 are connected to form a closed loop and connected to the main control board 7.

[0033] In this embodiment, the guide grooves 2 on both sides of the top of the detector housing 1 limit the bottom end of the limit rod 3, so that the reset spring 6 pushes the limit slide 5 to move in the guide groove 2. After the equipment is used, the dust cover 4 is slid to cover the two sides of the detector housing 1 to prevent the socket from being messy due to long-term use and affecting the detection results. By arranging a resistor 8 on one side of the main control board 7, the AC adjustment knob 10 is rotated and linked to one end of the rotating plate 9 to rotate on the inner side of the resistor 8, changing the value of the voltage display screen 11, and by pushing the AC switch knob 13 to move in the positioning cylinder 14, the semicircular connecting piece 16 at one end of the inner side of the AC switch knob 13 is rotated and fits with the top side of the three-dimensional positioning connecting rod 20, so that the AC input interface 17 is adjusted to be turned on when in use, and the traction spring 15 pushes the AC switch knob 13 to move outward, so that the adjusted AC input interface 17 is disconnected from the connecting line 19 and the outer ring connecting plate 18 and is not energized, thereby avoiding numerical errors when detecting other types of power supplies. Example 2

[0034] 1-6 , this embodiment is further optimized based on Embodiment 1. Specifically, an expansion interface 22 is provided on the side of the AC input interface 17 away from the AC switch knob 13 , and an AC output port 23 is provided on the side of the expansion interface 22 away from the AC input interface 17 .

[0035] Specifically, a current input port 24 to be measured is provided on one side of the bottom of the detector housing 1, a current switch 26 to be measured is provided on the side of the bottom of the detector housing 1 away from the current input port 24 to be measured, a duty cycle adjustment switch 25 is provided on one side of the detector housing 1 at the top of the current switch 26 to be measured, and a variable power resistor 35 is provided on the top of one side of the main control board 7. One end of the duty cycle adjustment switch 25 passes through the detector housing 1 and is connected to the inner and outer surfaces of the variable power resistor 35. After rotating and adjusting, the duty cycle adjustment switch 25 can adjust the length of the variable power resistor 35, thereby changing the power of the resistor. There are multiple current input ports 24 to be measured, and the multiple current input ports 24 to be measured are connected in parallel and do not affect each other.

[0036] Specifically, a voltmeter selection knob 12 and an ammeter selection knob 27 are symmetrically provided in the middle of one side of the detector housing 1, and a voltage and current dial 28 is symmetrically provided on the side of the detector housing 1 away from the current switch 26 to be measured. One end of the voltmeter selection knob 12 and the ammeter selection knob 27 passes through the detector housing 1 and is provided with a fan-shaped connector 29. The inner sides of multiple voltage and current dials 28 pass through the detector housing 1 and are connected to a switching circuit 30. The outer surface of one side of the fan-shaped connector 29 is respectively fitted and connected to one end of the switching circuit 30. There are four voltage and current dials 28, and the four dials of different sizes are symmetrically arranged. By rotating the fan-shaped connector 29, they are respectively connected to different switching circuits 30. The dials of different sizes are adjusted and connected to the main control board 7, which is convenient for measuring according to the follow-up of the voltage and current values.

[0037] In this embodiment, by setting up an expansion interface 22, when the device does not input 220 volt AC, a 12 volt DC can be input here instead, and power is supplied to the main control board 7 through the working power socket 21. The AC switch knob 13 is rotated to input 200 volt AC to the AC input interface 17, so that 220 volts are converted from AC to DC inside the device, and then converted from DC to AC. The AC adjustment knob 10 can be rotated to change the voltage coming out of the AC output port 23, ranging from 110 volts to 240 volts, and can be read through the voltage display screen 11. The power supply to be tested is inserted into the AC output port 23, so that the output end of the power supply to be tested is connected to the current input port 24 to be tested, and the voltage is turned. The duty cycle adjustment switch 25 is turned so that one end of the duty cycle adjustment switch 25 rotates inside the variable power resistor 35. By using a small resistor and a high-power resistor as negative numbers, the duty cycle is changed, and the equivalent resistance of the load connected to the power supply under test can be changed. By turning the voltmeter selection knob 12 and the ammeter selection knob 27, the switching circuit 30 is selected to switch voltage and ammeters of different sizes under the rotation of multiple fan-shaped contacts 29. The current resistance is measured by the voltage and ammeter dial 28, which is convenient for calculating the power, so that the output current, voltage, power, internal resistance and maximum output power parameters of the power supply under test can be measured under different AC input conditions and different loads. Example 3

[0038] Please refer to Figures 1-6. This embodiment is based on Example 1 or Example 2 and is optimized as follows. Specifically, the current switch 26 to be measured has one end that passes through the detector housing 1 and is provided with an arc-shaped disk 32. The bottom end of the arc-shaped disk 32 is fitted with a U-shaped rod 33. The bottom ends of the U-shaped rod 33 pass through the detector housing 1 and are located on the outside of the bottom of the detector housing 1. The middle bottom end of the U-shaped rod 33 is fitted with a high elastic block 36.

[0039] Specifically, the bottom of the high elastic block 36 is fixedly connected to the inner wall of the detector housing 1, the inner side of the current input port 24 to be measured passes through the detector housing 1 and is symmetrically fixedly connected with the arc interface 34, and the top of the U-shaped rod 33 is symmetrically provided with docking blocks with the arc interface 34. The U-shaped rod 33 is inverted, and the two ends of the bottom pass through the detector housing 1 and are slidingly connected to the inner wall of the detector housing 1. The high elastic block 36 is set in the middle of the lower surface of the U-shaped rod 33 and pushes the U-shaped rod 33 to move upward. The arc disk 32 is rotated to adjust the rise or fall of the U-shaped rod 33, and further adjust the connection and disconnection of the arc interface 34 with the docking block.

[0040] In this embodiment, the arc disk 32 is rotated by rotating the current switch 26 to be tested, so that the bottom of one end of the arc disk 32 squeezes the U-shaped rod 33 downward to squeeze and contract the high-elastic block 36, causing the arc interface 34 to separate from the docking block, thereby cutting off the input current to be tested. One end of the U-shaped rod 33 is connected through the power supply line 31. When the U-shaped rod 33 contacts the arc interface 34, multiple current switches 26 to be tested are restored to be connected, which facilitates multiple measurements to determine the performance of the power supply to be tested.

[0041] In summary: The utility model limits the bottom end of the limit rod 3 through the guide grooves 2 on both sides of the top of the detector housing 1, so that the reset spring 6 pushes the limit slide 5 to move in the guide groove 2. After the equipment is used, the dust cover 4 is slid to cover both sides of the detector housing 1 to prevent the socket from being messy due to long-term use and affecting the test results. The AC adjustment knob 10 is rotated to rotate one end of the linkage connecting rotating piece 9 on the inner side of the resistor 8 to change the value of the voltage display screen 11, so that the semicircular connecting piece 16 at one end of the inner side of the AC switch knob 13 is rotated and fits with the top side of the stereo positioning connecting rod 20. The traction spring 15 pushes the AC switch knob 13 to move outward, so that the AC input interface 17 is disconnected from the connecting line 19 and the outer ring board 18 and no power is supplied, so as to avoid numerical errors when detecting other types of power supplies. Power is supplied to the main control board 7 through the working power socket 21, and the AC switch knob 13 is rotated to pass 200 volt AC to the AC input interface 17, and the voltage is read through the voltage display screen 11. The power supply to be tested is inserted into the AC output port 23, so that the output end of the power supply to be tested is connected to the current input port 24 to be tested, and the duty cycle adjustment switch 25 is rotated so that the duty cycle adjustment switch One end of 25 is rotated inside the variable power resistor 35, and the duty cycle is changed by using a small resistor and a high power resistor as a negative number, thereby changing the equivalent resistance of the load connected to the power supply under test. By rotating the voltmeter selection knob 12 and the ammeter selection knob 27, the switching circuit 30 is selected to switch voltage and ammeters of different sizes under the rotation of multiple fan-shaped contacts 29, and the current and resistance are measured by the voltage and ammeter dial 28, which is convenient for calculating the power, so that the output current, voltage, power, internal resistance and the maximum value of the power supply under test can be measured under different AC input conditions and different loads. For large output power parameters, the arc disk 32 is rotated by rotating the current switch 26 to be tested, so that the bottom of one end of the arc disk 32 squeezes the U-shaped rod 33 to move downward and squeeze the high elastic block 36, prompting the arc interface 34 to separate from the docking block, thereby cutting off the input current to be tested. One end of the U-shaped rod 33 is connected through the power supply line 31. When the U-shaped rod 33 contacts the arc interface 34, multiple current switches 26 to be tested are restored to be connected. By setting the expansion interface 22, when the device does not input 220 volts AC, 12 volts DC can be input here instead, which is convenient for multiple measurements to determine the performance of the power supply to be tested.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A power supply detector, characterized in that: Guide grooves (2) are symmetrically provided on both sides of the top of the detector housing (1), and a plurality of limit rods (3) are fitted and connected to the inside of the guide grooves (2), and a plurality of dust cover plates (4) are fixedly connected to the top of the limit rods (3), and a plurality of limit slides (5) are fixedly connected to the bottom ends of the limit slides (5), and a return spring (6) is symmetrically fixedly connected to the top inside the bottom ends of the plurality of limit slides (5), and the tops of the plurality of return springs (6) are fixedly connected to the top inside the detector housing (1). A main control board (7) is provided at the middle end of the interior of the detector housing (1), and a resistor (8) is fixedly connected to one side of the top of the main control board (7). An AC adjustment knob (10) is rotatably installed on the top of the outer surface of one side of the detector housing (1).

2. A power supply detector according to claim 1, characterized in that: One end of the AC current adjustment knob (10) passes through the detector housing (1) and is provided with a connecting rotating piece (9), the outer surface of one end of the connecting rotating piece (9) is fitted and connected to the inner surface of the resistor sheet (8), and the outer surface of the detector housing (1) is provided with a voltage display screen (11) on one side of the AC current adjustment knob (10).

3. A power supply detector according to claim 1, characterized in that: An AC switch knob (13) is provided on the outer surface of the detector housing (1) at the bottom end of the AC adjustment knob (10), and a positioning cylinder (14) is fixedly connected to the inner wall of the detector housing (1) at one side of the AC switch knob (13).

4. A power supply detector according to claim 3, characterized in that: A traction spring (15) is provided at the inner top of the positioning cylinder (14), and the bottom end of the traction spring (15) is fixedly connected to one inner end of the AC switch knob (13). One end of the AC switch knob (13) passes through the positioning cylinder (14) and is fixedly connected to a semicircular connecting piece (16).

5. A power supply detector according to claim 4, characterized in that: An AC input interface (17) is provided on the outer surface of the detector housing (1) on one side of the AC switch knob (13); an outer ring connecting plate (18) is provided on the inner and outer sides of the detector housing (1); one end of the AC input interface (17) is fixedly connected to a connecting wire (19); one end of the connecting wire (19) passes through the positioning cylinder (14) and is fitted and connected to the outer surface of one end of the AC switch knob (13).

6. A power supply detector according to claim 5, characterized in that: A stereo positioning connecting rod (20) is fixedly connected to one side of the outer surface of the outer ring connecting plate (18), and the outer surface of the top end of the stereo positioning connecting rod (20) is in contact with the bottom of the semicircular connecting piece (16). An extension interface (22) is provided on the side of the AC input interface (17) away from the AC switch knob (13), and an AC output port (23) is provided on the side of the extension interface (22) away from the AC input interface (17).

7. A power supply detector according to claim 6, characterized in that: A current input port (24) to be measured is provided on one side of the bottom of the detector housing (1), a current switch (26) to be measured is provided on one side of the bottom of the detector housing (1) away from the current input port (24), a duty cycle adjustment switch (25) is provided on one side of the detector housing (1) at the top of the current switch (26) to be measured, a variable power resistor (35) is provided on the top of one side of the main control board (7), and one end of the duty cycle adjustment switch (25) passes through the detector housing (1) and is connected to the inner outer surface of the variable power resistor (35).

8. A power supply detector according to claim 7, characterized in that: A voltage meter selection knob (12) and an ammeter selection knob (27) are symmetrically provided in the middle of one side of the detector housing (1); a voltage and ammeter dial (28) is symmetrically provided on the side of the detector housing (1) away from the current switch (26) to be measured; one end of the voltage meter selection knob (12) and the ammeter selection knob (27) passes through the detector housing (1) and is provided with a fan-shaped connector (29); the inner sides of the plurality of voltage and ammeter dials (28) pass through the detector housing (1) and are connected to a switching circuit (30); and one side outer surface of the fan-shaped connector (29) is respectively fitted and connected to one end of the switching circuit (30).

9. A power supply detector according to claim 8, characterized in that: The current switch (26) to be measured, one end of the current switch (26) to be measured passes through the detector housing (1) and is provided with an arc-shaped disk (32), the bottom end of the arc-shaped disk (32) is fitted and connected to a U-shaped rod (33), the bottom ends of both ends of the U-shaped rod (33) pass through the detector housing (1) and are located outside the bottom of the detector housing (1), and the middle bottom end of the U-shaped rod (33) is fitted and connected to a high elastic block (36).

10. The power supply detector according to claim 9, characterized in that: The bottom of the high elastic block (36) is fixedly connected to the inner wall of the detector housing (1); the inner side of the current input port (24) to be measured passes through the detector housing (1) and is symmetrically fixedly connected to the arc interface (34); and the top of the U-shaped rod (33) is symmetrically provided with a docking block with the arc interface (34).

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