Serial port display screen aging test device

Abstract

The utility model provides an aging test device for a serial port display screen. The aging test device comprises a frame assembly, a plurality of substrates, a power supply assembly and a universal wheel assembly, the universal wheel assembly comprises a plurality of universal wheels, a brake pedal is arranged on each universal wheel, and each universal wheel is installed at the bottom of the frame assembly; the plurality of base plates are longitudinally arranged on the frame assembly in parallel, and the base plates arranged at the top of the frame assembly are arranged in a herringbone shape; the power supply assembly comprises adjustable power supplies and PCB power supply adapter plates, each layer of substrate is provided with one adjustable power supply and a plurality of PCB power supply adapter plates, the plurality of PCB power supply adapter plates are respectively connected with the adjustable power supplies, and each PCB power supply adapter plate is connected with a to-be-tested serial port display screen through spring power lines with different interfaces. According to the utility model, the spring power lines with different interfaces and the adjustable power supply are adopted to realize detection of the display screen and the serial port driving board at the same time, and the universal wheel assemblies are adopted, so that the aging test device for the serial port display screen can move in space conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of serial port display screen aging process, in particular to a serial port display screen aging test device. Background Art

[0002] The serial display screen consists of a display screen and a serial driver board. During the production stage, it is necessary to test and evaluate the performance and quality of each serial display screen to ensure that the product meets the standard requirements; during the repair and parts replacement stage, the serial display screen aging device is used to test and evaluate whether the replaced parts meet the requirements; during the return and recycling stage, the serial display screen aging device can be used to test and evaluate whether the recycled display screen meets the recycling standards; in short, the serial display screen aging device is a serial display screen testing equipment that can help producers and consumers evaluate the performance and quality of serial display screen products to ensure that the products meet the standard requirements and promote the sustainable development of products.

[0003] In the prior art, only the display screen can be aged separately, while the serial port display screen is a complete product composed of the display screen and the serial port driver board. The serial port display screen aging test device performs aging test on the display screen and the serial port driver board together, which can age both the display screen and the serial port driver board. Other display screen product aging devices require different aging devices for display screens of different types and sizes, and can only be used in a fixed position, and cannot be flexibly changed. The space utilization rate is low and the maintenance cost is increased. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a serial port display screen aging test device, which adopts a spring power cord with different interfaces and an adjustable power supply to simultaneously realize the aging test of the display screen and the serial port driver board, and can also perform aging tests on various models of serial port display screens. A universal wheel assembly is adopted to facilitate the movement of the serial port display screen aging test device in space, and an adjustable power supply is provided on each layer of the substrate, which can flexibly open or close the adjustable power supply on any layer of the substrate, so as to make full use of power resources and reduce electricity costs.

[0005] According to the utility model, a serial port display screen aging test device is provided, comprising: a frame component, a plurality of substrates, a power supply component, and a universal wheel component;

[0006] The universal wheel assembly comprises a plurality of universal wheels, each of which is provided with a brake pedal, each of which is mounted at the bottom of the frame assembly, and the universal wheel assembly is used for moving the position of the frame assembly;

[0007] The plurality of substrates are arranged in parallel on the frame assembly in a longitudinal direction, and the substrates disposed on the top of the frame assembly are arranged in a herringbone shape;

[0008] The power supply component includes an adjustable power supply and a PCB power adapter board. One adjustable power supply and multiple PCB power adapter boards are arranged on each layer of the substrate. The multiple PCB power adapter boards are respectively connected to the adjustable power supply, and each PCB power adapter board is connected to the serial port display screen to be tested through a spring power line with different interfaces.

[0009] Optionally, the power supply assembly further includes a power supply box, which includes a plurality of leakage protectors and a plurality of air switches, each of the leakage protectors is arranged on the air switch, and each of the air switches is connected to the adjustable power supply on each layer of the substrate.

[0010] Optionally, the PCB power adapter board includes a power input connector and a power output connector, the power input connector is connected to the adjustable power supply, and the power output connector is connected to the spring power cord with different interfaces.

[0011] Optionally, the voltage adjustment range of the adjustable power supply is 0-24V, and the current adjustment range of the adjustable power supply is 0-30A.

[0012] Optionally, the frame assembly includes a first frame, a second frame and a first fixed square tube, one end of the first fixed square tube is fixed at the top center position of the first frame, and the other end of the first fixed square tube is fixed at the top center position of the second frame.

[0013] Optionally, the first frame and the second frame respectively include a plurality of second fixed square tubes, two third fixed square tubes and one fourth fixed square tube, the plurality of second fixed square tubes are arranged in parallel at a first preset distance in the longitudinal direction, both ends of the plurality of second fixed square tubes are respectively connected to one of the third fixed square tubes, the fourth fixed square tube is connected to the center position of each of the second fixed square tubes, and the second fixed square tubes and the third fixed square tubes are arranged perpendicular to each other, and the fourth fixed square tube is arranged parallel to the third fixed square tube.

[0014] Optionally, the frame assembly further includes a plurality of movable square tubes, wherein every two of the movable square tubes are arranged in parallel in the transverse direction, and each group of the movable square tubes are arranged in parallel in the longitudinal direction at a second preset distance, one end of each of the movable square tubes is connected to the third fixed square tube on the first frame, and the other end of each of the movable square tubes is connected to the third fixed square tube on the second frame.

[0015] Optionally, the plurality of substrates are fixed on the plurality of movable square tubes, and the substrate disposed on the top of the frame assembly is fixed on the first fixed square tube.

[0016] Optionally, the base plate is fixed to the plurality of movable square tubes by means of L-shaped fixing angles and screws.

[0017] Optionally, the universal wheel assembly further includes a plurality of universal wheel mounting nuts, each of the universal wheel mounting nuts is fixed to the bottom of each of the third fixed square tubes, and the universal wheel is mounted to the bottom of the third fixed square tube of the frame assembly via the universal wheel mounting nuts and screws.

[0018] Compared with the prior art, the embodiment of the utility model has at least one of the following beneficial effects:

[0019] The above-mentioned device of the utility model is provided with a universal wheel assembly, which includes multiple universal wheels, and each universal wheel is also provided with a brake pedal, so that the position of the serial port display screen aging test device can be conveniently moved according to space requirements. When there is no need to move the position, the brake pedal on the universal wheel is stepped on, which is convenient for staff to operate; multiple substrates are provided, and an independently adjustable adjustable power supply is provided on each layer of substrates, so that the adjustable power supply of the current layer of substrates can be flexibly opened or closed and adjusted, so that power resources are fully utilized and electricity costs are reduced; the adjustable power supply is connected to the serial port display screen through a PCB power adapter board and a spring power cord with different interfaces, so that the aging test of the display screen and the serial port driver board can be realized at the same time, and the aging test of serial port display screens of various models can also be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0021] Figure 1 The utility model is a schematic diagram of the overall structure of a serial port display screen aging test device according to a preferred embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a frame assembly of a preferred embodiment of the utility model.

[0023] Figure 3 It is a structural schematic diagram of a power supply component and a substrate according to a preferred embodiment of the utility model.

[0024] Figure 4 It is a structural schematic diagram of a PCB power adapter board according to a preferred embodiment of the utility model.

[0025] Description of Reference Numerals

[0026] 100 serial port display screen aging test device

[0027] 1 Universal wheel

[0028] 11Brake pedal

[0029] 2 substrates

[0030] 3. Serial port display screen to be tested

[0031] 4 Adjustable power supply

[0032] 5PCB power adapter board

[0033] 51 Power input connector

[0034] 52 power output connector

[0035] 53PCB board

[0036] 6 spring power cord

[0037] 7 Power Box

[0038] 71 leakage protector

[0039] 72 air switch

[0040] 8 First Frame

[0041] 9 Second Frame

[0042] 110 first fixed square tube

[0043] 120 Second fixed square tube

[0044] 130 Third fixed square tube

[0045] 140 Fourth fixed square tube

[0046] 150 movable square tube

[0047] 101L type fixed angle

[0048] 102 Left connecting angle plate

[0049] 103 right connecting angle plate

[0050] 104 Cable duct DETAILED DESCRIPTION

[0051] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0052] Figure 1 The utility model is a schematic diagram of the overall structure of a serial port display screen aging test device according to a preferred embodiment of the present invention.

[0053] like Figure 1 As shown, the utility model provides a serial port display screen aging test device 100, including: a frame component, a plurality of substrates 2, a power supply component, and a universal wheel component.

[0054] The universal wheel assembly includes a plurality of universal wheels 1, each of which is provided with a brake pedal 11. Each universal wheel 1 is installed at the bottom of the frame assembly, and the universal wheel assembly is used for moving the position of the frame assembly.

[0055] When the serial port display screen aging test device 100 needs to be fixed in position for a long time, the brake pedal 11 can be stepped on to lock the universal wheel 1 to stop the frame assembly; when the serial port display screen aging test device 100 needs to be moved, the brake pedal 11 can be lifted up to unlock the universal wheel 1, so that the frame assembly can be moved flexibly.

[0056] A plurality of substrates 2 are arranged on the frame assembly in a longitudinal parallel manner, and the substrates 2 disposed on the top of the frame assembly are arranged in a herringbone shape.

[0057] Among them, a plurality of serial port display screens 3 to be tested can be arranged in a display manner on the substrate 2 .

[0058] The power supply assembly includes an adjustable power supply 4 and a PCB power adapter board 5. An adjustable power supply 4 and multiple PCB power adapter boards 5 are arranged on each layer of the substrate 2. The multiple PCB power adapter boards 5 are respectively connected to the adjustable power supply 4. Each PCB power adapter board 5 is connected to the serial port display screen 3 to be tested through a spring power cord 6 with different interfaces.

[0059] Among them, the adjustable power supply 4 is arranged on the upper surface of each layer of substrate 2 close to the edge of substrate 2, and multiple PCB power adapter boards 5 are arranged on the central axis of substrate 2 or on both sides of the central axis along the direction of the central axis of each layer of substrate 2.

[0060] In a possible embodiment, the adjustable power supply 4 is used to provide a test power supply for the serial port display screen 3 to be tested, the voltage adjustment range of the adjustable power supply 4 is 0-24V, and the current adjustment range of the adjustable power supply 4 is 0-30A. The adjustable power supply 4 can support all serial port display screen products whose serial port driver board working voltage is within the DC voltage of 24V.

[0061] In the present utility model, the PCB power adapter board 5 is used as a power interface conversion device for the serial port display screen 3 to be tested.

[0062] The above-mentioned device of the utility model is provided with a universal wheel assembly, which includes multiple universal wheels 1, and each universal wheel 1 is also provided with a brake pedal 11, so that the position of the serial port display screen aging test device 100 can be conveniently moved according to space requirements. When there is no need to move the position, the brake pedal 11 on the universal wheel 1 is stepped on, which is convenient for staff to operate; by providing multiple substrates 2, and providing an independently adjustable adjustable power supply 4 on each layer of the substrate 2, the adjustable power supply 4 of the current layer of the substrate 2 can be flexibly opened or closed and adjusted, so that power resources are fully utilized and electricity costs are reduced; the adjustable power supply 4 is connected to the serial port display screen through the PCB power adapter board 5 and the spring power cord 6 with different interfaces, so that the aging test of the display screen and the serial port driver board can be realized at the same time, and the aging test of serial port display screens of various models can also be performed.

[0063] Figure 2 It is a structural schematic diagram of a frame assembly of a preferred embodiment of the utility model.

[0064] like Figure 1 , Figure 2 As shown, the frame assembly includes a first frame 8, a second frame 9 and a first fixed square tube 110, one end of the first fixed square tube 110 is fixed at the top center position of the first frame 8, and the other end of the first fixed square tube 110 is fixed at the top center position of the second frame 9.

[0065] In the present invention, the number of the first fixed square tube 110 is one.

[0066] like Figure 2 As shown, the first frame 8 and the second frame 9 respectively include a plurality of second fixed square tubes 120, two third fixed square tubes 130 and a fourth fixed square tube 140, the plurality of second fixed square tubes 120 are arranged in parallel with a first preset distance in the longitudinal direction, both ends of the plurality of second fixed square tubes 120 are respectively connected to a third fixed square tube 130, the fourth fixed square tube 140 is connected to the center position of each second fixed square tube 120, and the second fixed square tubes 120 and the third fixed square tubes 130 are arranged perpendicular to each other, and the fourth fixed square tube 140 is arranged in parallel with the third fixed square tube 130.

[0067] The total number of the second fixed square tubes 120 can be 6, and the first frame 8 and the second frame 9 respectively include 3 second fixed square tubes 120. The number of the second fixed square tubes 120 can be adjusted according to the actual number of aging tests on the serial port display screens. If the number of serial port display screens that need aging tests is large, the number of the second fixed square tubes 120 can be increased, thereby increasing the height of the frame assembly; if the number of serial port display screens that need aging tests is small, the number of the second fixed square tubes 120 can be reduced, thereby reducing the height of the frame assembly.

[0068] As Figure 2 shown, in the present utility model, the first frame 8 and the second frame 9 are two sets of "field"-shaped frames, and the two sets of "field"-shaped frames are fixed by a first fixed square pipe 110. One end of the first fixed square pipe 110 is connected to the cross intersection between the second fixed square pipe 120 and the fourth fixed square pipe 140 at the top of the first frame 8, and the other end of the first fixed square pipe 110 is connected to the cross intersection between the second fixed square pipe 120 and the fourth fixed square pipe 140 at the top of the second frame 9. Thus, an "I"-shaped structure is formed.

[0069] Among them, the models and sizes of the first fixed square pipe 110, the second fixed square pipe 120, the third fixed square pipe 130, and the fourth fixed square pipe 140 may be the same or different.

[0070] In the present utility model, the materials of the fixed square pipes in the frame assembly are all made of steel, and each fixed square pipe is connected and fixed by welding.

[0071] As Figure 1 、 Figure 2 shown, in a possible embodiment, the frame assembly further includes a plurality of movable square pipes 150. Every two movable square pipes 150 are arranged in parallel along the horizontal direction, and each group of movable square pipes 150 is arranged in parallel at a second preset distance along the vertical direction. One end of each movable square pipe 150 is connected to the third fixed square pipe 130 on the first frame 8, and the other end of each movable square pipe 150 is connected to the third fixed square pipe 130 on the second frame 9.

[0072] In the present utility model, the number of the movable square pipes 150 may be 8, and the specifications and sizes of each movable square pipe 150 are the same. The number of the movable square pipes 150 can also be adjusted according to the actual number of aging detections of the serial port display, and the number of the movable square pipes 150 increases or decreases in multiples of 2.

[0073] As Figure 2 shown, in a possible embodiment, a left connecting angle plate 102 is provided at one end of each movable square pipe 150, and a right connecting angle plate 103 is provided at the other end of each movable square pipe.

[0074] Screw holes are provided in the front and rear of each third fixed square pipe 130 for the installation of the movable square pipes.

[0075] The movable square tube 150 is connected to the fixed square tube by screws, one end of each movable square tube 150 is connected to the third fixed square tube 130 arranged on the first frame 8 through the left connecting angle plate 102 and screws, and the other end of each movable square tube 150 is connected to the third fixed square tube 130 arranged on the second frame 9 through the right connecting angle plate 103 and screws.

[0076] A plurality of fixed square tubes and movable square tubes 150 form a rectangular parallelepiped frame as a whole, namely, a frame assembly.

[0077] like Figure 1 , Figure 2 As shown, in a possible embodiment, the universal wheel assembly also includes a plurality of universal wheel mounting nuts, each universal wheel mounting nut is fixed to the bottom of each third fixed square tube 130, and each universal wheel 1 is mounted to the bottom of the third fixed square tube of the frame assembly through the universal wheel mounting nut and screws.

[0078] The universal wheel mounting nut may be fixed to the bottom of each third fixed square tube 130 by welding.

[0079] By setting a universal wheel installation component, the position of the serial port display screen aging test device 100 can be moved according to space requirements, and the brake pedal 11 can be stepped on when it is not necessary to move, which is convenient for staff to operate.

[0080] like Figure 1 , Figure 2 As shown, in a possible embodiment, a plurality of substrates 2 are fixed on a plurality of movable square tubes 150 , and a substrate 2 disposed on the top of the frame assembly is fixed on a first fixed square tube 110 .

[0081] The base plate 2 is fixed to a plurality of movable square tubes 150 by means of L-shaped fixing angles 101 and screws.

[0082] Each movable square tube 150 may be provided with two L-shaped fixing angles 101 , and each L-shaped fixing angle 101 may be fixed to each movable square tube 150 by welding.

[0083] As an example, each base plate 2 arranged in a longitudinal parallel manner on the frame assembly is fixed to each set of parallel movable square tubes 150 through an L-shaped fixing angle 101 and screws.

[0084] As another example, the two ends of the substrate 2 arranged in a herringbone shape and disposed on the top of the frame assembly are respectively fixed to the movable square tubes 150 parallel to each other on the top of the frame assembly by L-shaped fixing angles 101 and screws, and the first fixed square tube 110 is also used to support the central axis position of the substrate 2 to form a herringbone arrangement structure.

[0085] The substrate 2 of the utility model can be made of wood material, and an insulating rubber pad can be provided on the surface to prevent the serial port display screen 3 product to be tested from short circuiting.

[0086] Figure 3 It is a structural schematic diagram of a power supply component and a substrate according to a preferred embodiment of the utility model.

[0087] like Figure 3 As shown, in a possible embodiment, the power supply assembly also includes a power supply box 7, the power supply box 7 includes a plurality of leakage protectors 71 and a plurality of air switches 72, each leakage protector 71 is arranged on the air switch 72, and each air switch 72 is connected to the adjustable power supply 4 on each layer of the substrate 2.

[0088] Among them, one end of the power box 7 is fixed to the outer side surface of the third fixed square tube 130 on the second frame 9 located below the bottom substrate 2 by screws, and the other end of the power box 7 is fixed to the outer side surface of the fourth fixed square tube 140 on the second frame 9 located below the bottom substrate 2 by screws.

[0089] Each set of air switches 72 and leakage protectors 71 is used to control the adjustable power supply 4 disposed on a layer of substrate 2 to be turned on or off. The number of sets of air switches 72 and leakage protectors 71 is the same as the number of adjustable power supplies 4.

[0090] like Figure 1 , Figure 3 As shown, a serial port display screen aging test device 100 also includes a wiring groove 104, which is arranged on the outer surface of the fourth fixed square tube 140 on the second frame 9 along the length direction of the fourth fixed square tube 140.

[0091] One end of each air switch 72 is connected to the 220V mains power plug of the power inlet of the power box 7. The other end of each air switch 72 is connected to the 220V mains power plug of the power inlet of the power box 7. 2 The copper wire is connected to the adjustable power supply 4, and the copper wire is fixed in the wiring groove 104.

[0092] The wiring groove 104 is used to store the copper wires connecting the air switch 72 and the adjustable power supply 4 to prevent knots, facilitate the storage of wires, and facilitate operation.

[0093] The input end of each leakage protector 71 is connected to the 220V mains power plug of the power supply inlet of the power supply box 7, and the output neutral line of each leakage protector 71 is the common line of the adjustable power supply 4 set on each layer of substrate 2. The output neutral line of each leakage protector 71 is connected to the neutral line input end of each layer of adjustable power supply 4; the output live line of each leakage protector 71 is connected to the input end of the air switch 72 that controls each layer of adjustable power supply 4, and the output end of each air switch 72 adopts a cross-sectional area of ​​4mm2 The copper wire is connected to the live wire input terminal of the controlled adjustable power supply 4.

[0094] In the utility model, the copper wire connecting the air switch 72 and the adjustable power supply 4 can be fixed in the wiring groove 104 on the fourth fixed square tube 140 according to the corresponding layer number where the adjustable power supply 4 is located. The fixing method includes but is not limited to gluing and screw fixing. When the screw fixing method is used, insulation measures must be taken.

[0095] like Figure 1 , Figure 3 As shown, the cross-sectional area of ​​4 mm is also used between the adjustable power supply 4 set on each layer of the substrate 2 and the multiple PCB power adapter boards 5. 2 The copper wires are connected and fixed on the upper surface of each layer of substrate 2.

[0096] Figure 4 It is a structural schematic diagram of a PCB power adapter board according to a preferred embodiment of the utility model.

[0097] like Figure 4 As shown, in a possible embodiment, the PCB power adapter board 5 includes a power input connector 51 and a power output connector 52, the power input connector 51 is connected to the adjustable power supply 4, and the power output connector 52 is connected to the spring power cord 6 with different interfaces.

[0098] The power input connector 51 can be soldered on the PCB board by a through-hole method, and the power output connector 52 can be soldered on the PCB board by a patch method.

[0099] In a possible embodiment, the output end of the adjustable power supply 4 passes through a cross-sectional area of ​​4 mm 2 The copper wire is connected to the power input connector 51 on the PCB power adapter board 5.

[0100] like Figure 3 , Figure 4 As shown, in the present invention, the power input connector 51 on the PCB power adapter board 5 is connected in parallel according to the positive and negative poles, and the cross-sectional area of ​​the PCB power adapter board 5 can be 4mm 2 The PCB power adapter board 5 is vertically installed on the central axis of each layer of the substrate 2 or on both sides of the central axis by gluing.

[0101] In a possible embodiment, the serial port display screen includes a display screen and a driver board. When performing an aging test on the serial port display screen to be tested:

[0102] The first step is to turn on the air switch 72 and the leakage protector 71;

[0103] The second step is to determine whether the voltage of the adjustable power supply 4 is consistent with the required working voltage of the serial port display screen 3 to be tested. If not, adjust the voltage of the adjustable power supply 4 to be consistent with the required working voltage of the serial port display screen 3 to be tested and then turn off the air switch 72; if consistent, turn off the air switch 72;

[0104] Step 3: Set the serial port display 3 to be tested as follows Figure 3 The array shown is arranged on the surface of each layer of the substrate 2, the power output connector 52 of the PCB power adapter board 5 is connected to the input end of the spring power line 6 that matches the driver board of the serial port display screen 3 to be tested, and the output end of the spring power line 6 is connected to the power interface of the driver board of the serial port display screen 3 to be tested in turn;

[0105] The fourth step is to open the air switch 72 corresponding to the substrate 2 on which the serial port display screen 3 to be tested is installed, and the serial port display screen 3 to be tested is powered on and tested and recorded according to the aging test time requirements. During the testing process, the staff can visually screen out defective products by checking the serial port display screen 3 to be tested. After the aging test time has passed, the aging test is completed.

[0106] In the description of the above embodiments, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Similarly, "first" and "second" do not indicate order, but are used to distinguish corresponding technical features.

[0107] The above describes the specific embodiments of the utility model. It should be understood that the utility model is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the utility model. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A serial port display screen aging test device, It is characterized in that include: Frame assembly, multiple base plates, power supply assembly, universal wheel assembly; The universal wheel assembly comprises a plurality of universal wheels, each of which is provided with a brake pedal, each of which is mounted at the bottom of the frame assembly, and the universal wheel assembly is used for moving the position of the frame assembly; The plurality of substrates are arranged in parallel on the frame assembly in a longitudinal direction, and the substrates disposed on the top of the frame assembly are arranged in a herringbone shape; The power supply component includes an adjustable power supply and a PCB power adapter board. One adjustable power supply and multiple PCB power adapter boards are arranged on each layer of the substrate. The multiple PCB power adapter boards are respectively connected to the adjustable power supply, and each PCB power adapter board is connected to the serial port display screen to be tested through a spring power line with different interfaces.

2. The serial port display screen aging test device according to claim 1, It is characterized in that The power supply assembly also includes a power supply box, which includes a plurality of leakage protectors and a plurality of air switches. Each leakage protector is arranged on the air switch, and each air switch is connected to the adjustable power supply on each layer of the substrate.

3. The serial port display screen aging test device according to claim 1, It is characterized in that The PCB power adapter board includes a power input connector and a power output connector, the power input connector is connected to the adjustable power supply, and the power output connector is connected to the spring power line with different interfaces.

4. The serial port display screen aging test device according to claim 1, It is characterized in that The voltage adjustment range of the adjustable power supply is 0-24V, and the current adjustment range of the adjustable power supply is 0-30A.

5. The serial port display screen aging test device according to claim 1, It is characterized in that The frame assembly includes a first frame, a second frame and a first fixed square tube, one end of the first fixed square tube is fixed at the top center of the first frame, and the other end of the first fixed square tube is fixed at the top center of the second frame.

6. The serial port display screen aging test device according to claim 5, It is characterized in that The first frame and the second frame respectively include a plurality of second fixed square tubes, two third fixed square tubes and a fourth fixed square tube, wherein the plurality of second fixed square tubes are arranged in parallel with a first preset distance in the longitudinal direction, both ends of the plurality of second fixed square tubes are respectively connected to one of the third fixed square tubes, the fourth fixed square tube is connected to the center position of each of the second fixed square tubes, and the second fixed square tubes and the third fixed square tubes are arranged perpendicular to each other, and the fourth fixed square tube is arranged in parallel with the third fixed square tube.

7. The serial port display screen aging test device according to claim 6, It is characterized in that The frame assembly also includes a plurality of movable square tubes, wherein every two of the movable square tubes are arranged in parallel in the transverse direction, and each group of the movable square tubes are arranged in parallel in the longitudinal direction at a second preset distance, one end of each of the movable square tubes is connected to the third fixed square tube on the first frame, and the other end of each of the movable square tubes is connected to the third fixed square tube on the second frame.

8. The serial port display screen aging test device according to claim 7, It is characterized in that The plurality of base plates are fixed on the plurality of movable square tubes, and the base plate arranged on the top of the frame assembly is fixed on the first fixed square tube.

9. The serial port display screen aging test device according to claim 8, It is characterized in that The base plate is fixed on the plurality of movable square tubes through L-shaped fixing angles and screws.

10. The serial port display screen aging test device according to claim 6, It is characterized in that The universal wheel assembly also includes a plurality of universal wheel mounting nuts, each of which is fixed to the bottom of each of the third fixed square tubes, and each of the universal wheels is mounted to the bottom of the third fixed square tube of the frame assembly via the universal wheel mounting nuts and screws.

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