An automated inspection device and method for PCB circuit boards

Abstract

The application relates to an automatic detection device and method for a PCB circuit board, the automatic detection device for the PCB circuit board comprises a workbench arranged in a rectangular shape, guide rods are fixed at four corners of the workbench, a detection box is slidably installed on the guide rods, a detection assembly for inspecting the PCB board is installed in the detection box, a supporting plate is fixed to one end of the guide rod away from the workbench, springs are fixed between the supporting plate and the detection box, the springs are sleeved outside the guide rods, a driving assembly for driving the detection box to vertically move is installed on one side of the supporting plate facing the detection box, detection is started through a touch-out trigger switch mode, the problem that the PCB board is damaged in a hot plug process is avoided, and whether each pin of the PCB board is bent or not can be accurately detected through cooperation of an outward expansion part of a pin slot and a detection ring, and if the pin is bent, the bent pin can be determined.

Description

Technical Field

[0001] This invention relates to the field of PCB boards, specifically to an automated testing device and method for PCB circuit boards. Background Technology

[0002] PCB, or Printed Circuit Board, is an important electronic component. It serves as the support for electronic components and the carrier for their electrical interconnection. Because it is manufactured using electronic printing technology, it is called a "printed" circuit board.

[0003] In some PCB manufacturing processes, especially in multi-layer stacked and detachable installation scenarios, the connection between multiple stacked circuit boards is usually achieved through pins on the bottom of the circuit board. Therefore, after processing, it is necessary to test each individual power board through the pins on the bottom of the circuit board to ensure the yield rate.

[0004] In response, a Chinese patent provides an automated testing device for PCB board production, publication number: CN117420409A. This method uses the movement of a dial plate to push the PCB board to a designated position. After pushing, the testing is performed. This device is used to test the chip pins on the PCB board. This device only improves the positioning. If the pins are bent during testing, normal testing cannot be performed. In addition, automated testing is usually done on a production line. This device is also inconvenient in terms of material feeding and unloading. The connection method of the multilayer stacked circuit board is similar to that of the processor and the motherboard. Summary of the Invention

[0005] The purpose of this invention is to provide an automated testing device and method for PCB circuit boards to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automated inspection device for PCB circuit boards includes:

[0008] A rectangular workbench is provided, with guide rods fixed at each of the four corners. A test box is slidably mounted on the guide rods, and a test assembly for inspecting PCB boards is installed inside the test box.

[0009] A support plate is fixed to the end of the guide rod away from the worktable. A spring is fixed between the support plate and the detection box. The spring is sleeved on the outside of the guide rod. A drive assembly for driving the detection box to move vertically is installed on the side of the support plate facing the detection box.

[0010] The workbench has an assembly slot on the side facing the inspection box. A conveying assembly is installed in the assembly slot, and positioning components for PCB board alignment are installed on both sides of the conveying assembly.

[0011] As a further aspect of the present invention: the positioning component includes two sets of pushing members rotatably mounted on the worktable and arranged opposite to each other;

[0012] The pushing component includes two sleeve plates rotatably mounted on the workbench. A sliding plate is slidably mounted inside the sleeve plates. A roller is rotatably mounted on one end of the sliding plate away from the sleeve plates. A return spring is fixed to one end of the sliding plate away from the roller. The other end of the return spring is fixed to the bottom of the sleeve plate.

[0013] The bottom of the workbench is rotatably mounted with a set of meshing gears, which are connected to the shafts of the two sleeve plates via two first transmission belts.

[0014] As a further embodiment of the present invention: the positioning component further includes two limiting strips disposed on the edge of the assembly groove, and each of the two limiting strips is provided with a notch at the center position. A clamping plate is slidably installed in the notch. A third transmission rod is rotatably installed on the side of the clamping plate away from the other clamping plate, passing through the worktable and rotatably connected to the worktable. An elastic wheel is coaxially fixed at one end of the third transmission rod.

[0015] A second transmission rod is rotatably mounted on the bottom of the workbench. A first ratchet gear is coaxially fixed at one end of the second transmission rod, and the other end of the second transmission rod is connected to the third transmission rod through a bevel gear set. A first pawl plate that cooperates with the first ratchet gear is fixed on the side of the detection box facing the workbench. A through groove is provided on the workbench for the first pawl plate to pass through.

[0016] As a further aspect of the present invention: the detection component includes a trigger and an integrated detection plate that are slidably installed inside the detection box;

[0017] The trigger is fixed to the second spring sheet installed inside the detection box, and four contact plates arranged in a rectangle are fixed on the side of the trigger away from the second spring sheet;

[0018] The integrated detection board is provided with multiple pin slots on the side facing the workbench, and the integrated detection board is also electrically connected to the analysis equipment fixed to the top of the detection box;

[0019] The bottom of the testing box has an inlet for the PCB board to enter, and the edge of the inlet has a wedge-shaped surface. The testing box is also equipped with a trigger switch that cooperates with the trigger element. The trigger switch is electrically connected to the analysis equipment.

[0020] As a further embodiment of the present invention: the edge of the pin groove is set outward, and a detection ring is provided in the outwardly expanded part of the pin groove, and the detection ring is electrically connected to the bending analyzer integrated on the integrated detection board.

[0021] As a further embodiment of the present invention: the conveying assembly includes two conveying rollers rotatably mounted in the assembly groove, the two conveying rollers being connected by a conveyor belt, and a plurality of support rollers are also rotatably mounted at equal intervals in the assembly groove;

[0022] A second ratchet plate is also fixed on one side of the testing box. The second ratchet plate cooperates with a second ratchet gear rotatably mounted on one side of the workbench. The shaft of the second ratchet gear is connected to the conveyor roller through a second transmission belt.

[0023] As a further embodiment of the present invention: the driving assembly includes a first transmission rod rotatably mounted on the bottom of the support plate, and a plurality of cams are coaxially fixed on the first transmission rod;

[0024] A motor is fixed to one side of the support plate, and the output shaft of the motor is coaxially fixed with the first transmission rod.

[0025] As a further embodiment of the present invention: a control panel is also installed on one side of the testing box, the control panel is electrically connected to the analysis equipment, the integrated testing board, and the bending analyzer, and the control panel is also electrically connected to a computer.

[0026] An automated inspection method for PCB boards, wherein the automated inspection method for PCB boards employs the aforementioned automated inspection device for PCB circuit boards, and includes the following steps:

[0027] Step 1: The PCB board is transported to the bottom of the inspection box by means of the conveying components and the production line conveying equipment.

[0028] Step 2: Drive the detection box to rise and fall vertically using the drive component, and use the positioning component to correct and position the PCB board so that the PCB board is directly below the detection box.

[0029] Step 3: The detection components inside the detection box are used to detect whether the pins of the PCB board are bent and whether the PCB board can work normally.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] Effect 1: The positioning component can correct the PCB board to the designated position, so that the conveying component can automatically complete the positioning work when cooperating with the production line or when manually unloading materials;

[0032] Secondly, the PCB board can be clamped during the pin removal process after the detection component is plugged in to avoid cascading.

[0033] Effect 2: The detection is initiated by triggering the start switch, thus avoiding PCB board damage during hot-swapping.

[0034] Effect 3: With the cooperation of the outer expansion of the pin groove and the detection ring, it is possible to accurately detect whether each pin on the PCB board is bent, and if bending occurs, to identify which pin is bent. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of an automated testing device for PCB circuit boards.

[0036] Figure 2 for Figure 1 A structural diagram of another direction / angle.

[0037] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0038] Figure 4 for Figure 1 An exploded view of a portion of the structure.

[0039] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0040] Figure 6 for Figure 4 Enlarged view of point C in the middle.

[0041] Figure 7 for Figure 4 A structural diagram of another direction / angle.

[0042] Figure 8 This is a schematic diagram of the pin slot structure in an automated inspection device for PCB circuit boards.

[0043] Figure 9 This is a schematic diagram of the conveying components in an automated inspection device for PCB circuit boards.

[0044] Figure 10 This is a quarter-section view of the inspection box in an automated inspection device for PCB circuit boards.

[0045] Figure 11 This is a schematic diagram of the drive components in an automated inspection device for PCB circuit boards.

[0046] Figure 12 This is a schematic diagram of the state of the elastic wheel in an automated inspection device for PCB circuit boards.

[0047] Figure 13 This is a control block diagram of the control panel in an automated inspection device for PCB circuit boards.

[0048] In the diagram: 1. Workbench; 2. Guide rod; 3. Detection box; 4. Spring; 5. Motor; 6. Conveyor belt; 7. Support plate; 8. Cam; 9. First transmission rod; 10. Control panel; 11. First transmission belt; 12. First ratchet plate; 13. Bevel gear set; 14. Second transmission rod; 15. First ratchet; 16. Gear set; 17. Second ratchet plate; 18. Second ratchet; 19. Second transmission belt; 20. Conveyor roller; 21. Trigger; 22. Integrated detection plate; 23. Analytical equipment; 24. First spring; 25. Second spring; 26. Elastic wheel; 27. Clamping plate; 28. Limiting strip; 29. ​​Sleeve plate; 30. Slide plate; 31. Roller; 32. Bending analyzer; 33. Needle groove; 34. Support roller; 35. Third transmission rod; 36. Trigger switch. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0051] Example 1, please refer to Figures 1-13 An automated inspection device for PCB circuit boards includes a rectangular workbench 1. At least four legs are mounted on the bottom of the workbench 1 to support it. The height of the support legs is selected according to actual conditions and is not specifically limited in this application. Guide rods 2 are fixed at each of the four corners of the workbench 1. Inspection boxes 3 are slidably mounted on the guide rods 2. Inspection components for inspecting PCB boards are installed inside the inspection boxes 3. Guide sleeves are fixed through and fixed to each of the four corners of the inspection boxes 3. The inspection boxes 3 are slidably mounted on the guide rods 2 via the guide sleeves.

[0052] A support plate 7 is fixed to the end of the guide rod 2 away from the workbench 1. A spring 4 is fixed between the support plate 7 and the detection box 3. The spring 4 is sleeved on the outside of the guide rod 2. The two ends of the spring 4 are fixed to the support plate 7 and the detection box 3 on opposite sides respectively. A drive assembly for driving the detection box 3 to move vertically is installed on the side of the support plate 7 facing the detection box 3.

[0053] The workbench 1 has an assembly slot on the side facing the inspection box 3. A conveying component is installed in the assembly slot, and positioning components for PCB board alignment are installed on both sides of the conveying component.

[0054] In this embodiment of the invention, the PCB board is conveyed to the bottom of the inspection box 3 by the conveying component. Then, the PCB board is corrected by the positioning component to ensure that the PCB board is directly below the inspection box 3. Subsequently, the inspection box 3 is driven to descend vertically by the driving component. When the inspection box 3 descends, it drives the inspection component inside to move together. When the inspection box 3 moves to the end of its stroke, the PCB board is inspected. When the inspection box 3 moves back and forth, that is, after the inspection of the PCB board is completed, the PCB board is conveyed again by the conveying component to repeat the above movement state to complete the automated inspection of the PCB board.

[0055] The positioning assembly includes two sets of pushers that are rotatably mounted on the worktable 1 and arranged opposite to each other;

[0056] The pusher includes two sleeve plates 29 rotatably mounted on the workbench 1. A slide plate 30 is slidably mounted inside the sleeve plate 29. A roller 31 is rotatably mounted on the end of the slide plate 30 away from the sleeve plate 29. A return spring is fixed to the end of the slide plate 30 away from the roller 31. The other end of the return spring is fixed to the bottom of the sleeve plate 29. The return spring is not shown in the figure.

[0057] A gear set 16 is rotatably mounted on the bottom of the workbench 1. The gear set 16 is connected to the rotating shafts of the two sleeve plates 29 through two first transmission belts 11. The gear set 16 includes two meshing gears, No. 1 and No. 2, with a transmission ratio of 1:1.

[0058] In this embodiment of the invention, the shaft of the gear set 16 or the sleeve 29 is connected to the drive motor. The gear set 16 is the default in this invention, and the drive motor is a servo motor.

[0059] When the drive motor is working, it drives the first gear to rotate. At the same time, the first gear drives the second gear to rotate in the opposite direction, so that the first gear and the second gear are in a state of relative rotation. Meanwhile, the first gear and the second gear drive the two sleeve plates 29 to rotate relative to each other through the first transmission belt 11. The corresponding slide plate 30 and roller 31 follow the movement of the sleeve plate 29.

[0060] After the PCB board is conveyed to the approximate position by the conveying assembly, the relative rotation of the two sleeve plates 29 drives the slide plate 30 and roller 31 to rotate. If the position of the PCB board is inaccurate, the roller 31 contacts the PCB board and pushes the PCB board to the designated position. In order to avoid the PCB board being inaccurate in size during the production process, the slide plate 30 is designed to be telescopic, and the roller 31 can reduce the wear between the roller 31 and the PCB board during operation. This embodiment adjusts the position of the PCB board along the conveying direction. Of course, this structure is only one way to achieve the effect, and the specific structure used is not specifically limited in this application.

[0061] It should also be noted that when no adjustment is required, the plate 29, the slide 30, and the roller 31 are rotated so that they are not above the motor 5.

[0062] The positioning assembly also includes two limiting strips 28 set at the edge of the assembly slot, and each of the two limiting strips 28 has a notch at its center. A clamping plate 27 is slidably installed in the notch. The clamping plate 27 is slidably installed in a slide groove starting on the worktable 1 by a slider, and a return spring is installed in the slide groove. Rubber pads are provided on opposite sides of the two clamping plates 27 to improve the friction during clamping. A third transmission rod 35 is rotatably installed on the side of the clamping plate 27 away from the other clamping plate 27, passing through the worktable 1 and rotatably connected to the worktable 1. An elastic wheel 26 is coaxially fixed at one end of the third transmission rod 35. The elastic wheel 26 includes a disc body, and multiple elastic plates are equidistantly fixed on the edge of the disc body.

[0063] A second transmission rod 14 is rotatably mounted on the bottom of the workbench 1. A first ratchet gear 15 is coaxially fixed at one end of the second transmission rod 14, and the other end of the second transmission rod 14 is connected to a third transmission rod 35 through a bevel gear set 13. A first pawl plate 12 that cooperates with the first ratchet gear 15 is fixed on the side of the detection box 3 facing the workbench 1. A through slot is provided on the workbench 1 for the first pawl plate 12 to pass through. The bevel gear set 13 includes two meshing bevel gears, which are coaxially fixed to the second transmission rod 14 and the third transmission rod 35, respectively.

[0064] In this embodiment of the invention, when the detection box 3 descends, it drives the first ratchet plate 12 to descend along with it. When the first ratchet plate 12 descends, it does not have a transmission relationship with the first ratchet gear 15. When the detection box 3 descends to the end of its stroke, the detection begins, that is, the pins of the PCB board are inserted into the detection equipment. Since the two are connected by a plug-in connection, there will inevitably be a certain friction. During the reciprocating motion, the pins will lift the PCB board, which requires manual adjustment of the equipment and has a high probability of damaging the PCB board. When the detection box 3 reciprocates, that is, when the pins of the PCB board are pulled out of the detection equipment, the first ratchet plate 12 drives the first ratchet gear 15 to rotate. When the first ratchet gear 15 rotates, it drives the second transmission rod 14 to rotate. Then, the bevel gear set 13 drives the third transmission rod 35 and the elastic wheel 26 to rotate. When the elastic wheel 26 rotates, the spring of the elastic wheel 26 pushes the clamping plate 27 to clamp the PCB board.

[0065] When the elastic wheel 26 pushes the clamping plate 27 through the spring sheet, it utilizes the elasticity of the spring sheet when it bends. The elasticity of the spring sheet is greater than that of the return spring.

[0066] It should also be noted that the adjacent spring pieces of the elastic wheel 26 are not bent when the elastic wheel 26 is not driven to rotate by a power source, and are inclined to the clamping plate 27 as follows. Figure 11 As shown;

[0067] This embodiment uses two limiting strips 28 to limit the path of the PCB board during transportation and solves the problem of cascading during insertion detection.

[0068] The detection components include a trigger 21 and an integrated detection plate 22 that are slidably installed inside the detection box 3;

[0069] The trigger 21 is fixed to the second spring 25 installed inside the detection box 3, and four contact plates arranged in a rectangle are fixed on the side of the trigger 21 away from the second spring 25.

[0070] The integrated detection board 22 has multiple pin slots 33 on the side facing the workbench 1, and the integrated detection board 22 is also electrically connected to the analysis device 23 fixed on the top of the detection box 3.

[0071] The bottom of the test box 3 has an inlet for the PCB board to enter, and the edge of the inlet has a wedge-shaped surface. The test box 3 also has a trigger switch 36 that cooperates with the trigger 21. The trigger switch 36 is electrically connected to the analysis device 23.

[0072] The edge of the pin groove 33 is set outward, and a detection ring is provided in the outward part of the pin groove 33. The detection ring is electrically connected to the bending analyzer 32 integrated on the integrated detection board 22.

[0073] In this embodiment of the invention, the process before the detection process may cause the pins of the PCB board to be slightly bent. The pins can be detected by the outer expansion of the pin slot 33. If the pins of the PCB board are not bent, they will not contact the outer expansion of the pin slot 33. If they are bent, they will contact the outer expansion of the pin slot 33. The detection is carried out by the detection ring inside the pin slot 33 and the data is sent to the bending analyzer 32.

[0074] In this embodiment, it is possible to accurately determine whether each pin on the PCB board is bent, and if bending occurs, specifically which pin is bent.

[0075] When the drive component is working, it drives the test box 3 and the components installed inside the test box 3 to descend. When the test box 3 descends to contact the PCB board, the position of the wedge face on the PCB board is finely adjusted so that the PCB board can accurately enter the test box 3 through the inlet and abut against the contact plate of the contact component 21, and insert the pins into the pin groove 33.

[0076] After the pins on the PCB board are inserted into the pin slots 33, the detection box 3 continues to descend. Since the PCB board is stationary, the trigger 21 abuts against the PCB board through the contact plate during the descent of the detection box 3. As the detection box 3 continues to descend, the detection box 3 and the trigger 21 are in a relative sliding state. As the detection box 3 gradually descends, the trigger 21 contacts the trigger switch 36. At this time, the detection box 3 moves to the end of its stroke. The contact between the trigger 21 and the trigger switch 36 triggers the trigger switch 36, which sends a start signal to the analysis device 23. At this time, the detection is performed.

[0077] When the trigger 21 slides relative to the detection box 3, it compresses the second spring 25, so that the second spring 25 stores a certain elastic potential energy. When the detection box 3 rises, the trigger 21 is reset by releasing the elastic potential energy of the second spring 25.

[0078] The analysis device 23 is started by triggering the trigger switch 36 when the detection box 3 moves to the end of its stroke. This allows the PCB board pins to start the detection after being inserted into the pin slot 33, thus avoiding damage to the PCB board caused by hot-plugging.

[0079] It should also be noted that the integrated testing board 22 also abuts against the first spring 24 installed in the testing box 3, so that the integrated testing board 22 can make some room when it encounters a PCB board with unqualified thickness, thus avoiding damage.

[0080] Example 2: The difference from the example is that the conveying assembly includes two conveying rollers 20 rotatably mounted in the assembly groove, the two conveying rollers 20 are connected by a conveyor belt 6, and multiple support rollers 34 are also rotatably mounted at equal intervals in the assembly groove;

[0081] A second ratchet plate 17 is also fixed on one side of the test box 3. The second ratchet plate 17 cooperates with the second ratchet gear 18 which is rotatably installed on one side of the workbench 1. The shaft of the second ratchet gear 18 is connected to the conveyor roller 20 through the second transmission belt 19.

[0082] In this embodiment of the invention, when the detection box 3 descends, it drives the second ratchet plate 17 to descend as well. During the descent of the second ratchet plate 17, it does not have a transmission relationship with the second ratchet gear 18. When the detection box 3 rises, it drives the second ratchet plate 17 to rise. The second ratchet gear 18 is driven to rotate through the cooperation of the second ratchet plate 17 and the second ratchet gear 18. When the second ratchet gear 18 rotates, it drives the conveyor roller 20 to rotate through the second transmission belt 19. When the conveyor roller 20 rotates, it conveys the conveyor belt 6.

[0083] The second ratchet plate 17 has only half of its ratchet set. Its function is that when the detection box 3 and the second ratchet plate 17 rise, the part without the ratchet set will not have a transmission relationship with the second ratchet gear 18. After the detection box 3 and the second ratchet plate 17 rise a certain distance, the ratchet of the worktable 1 will drive the second ratchet gear 18 to rotate, so as to avoid the conveyor belt 6 being transported when the pins of the PCB board are not pulled out from the pin slot 33, which would damage the pins.

[0084] The drive assembly includes a first transmission rod 9 rotatably mounted on the bottom of the support plate 7, and a plurality of cams 8 are coaxially fixed on the first transmission rod 9;

[0085] A motor 5 is fixed on one side of the support plate 7, and the output shaft of the motor 5 is coaxially fixed with the first transmission rod 9.

[0086] In this embodiment of the invention, when the motor 5 is working, it drives the first transmission rod 9 to rotate through the output shaft. When the first transmission rod 9 rotates, it drives the detection box 3 to move vertically downward through the cam 8. When the detection box 3 moves vertically downward, it compresses the spring 4, so that the spring 4 stores a certain amount of elastic potential energy. When the protruding part of the cam 8 rotates away from the detection box 3, it releases the elastic potential energy of the spring 4 to drive the detection box 3 to move vertically upward.

[0087] A control panel 10 is also installed on one side of the testing box 3. The control panel 10 is electrically connected to the analysis equipment 23, the integrated testing board 22, and the bending analyzer 32. The control panel 10 is also electrically connected to the computer.

[0088] like Figure 12As shown, the control panel 10 in this invention is the main control and control unit. The motor 5 is started and turned on after the control panel 10 collects the trigger signal from the trigger switch 36 and sends it to the motor 5 to drive the motor 5 to work. Of course, the duration of operation can be adjusted through the control panel 10.

[0089] The detection ring and integrated detection board 22 send the collected information directly to the control panel 10. The control panel 10 converts the collected data and sends it to the computer for analysis.

[0090] This invention also provides an automated inspection method for PCB boards, which uses an automated inspection device for PCB circuit boards and includes the following steps:

[0091] Step 1: The PCB board is conveyed by the conveying components in conjunction with the production line conveying equipment to the bottom of the inspection box 3;

[0092] Step 2: Drive the detection box 3 to descend vertically using the drive component, and use the positioning component to correct and position the PCB board so that the PCB board is directly below the detection box 3.

[0093] Step 3: Use the detection components inside the detection box 3 to check whether the pins of the PCB board are bent and whether the PCB board can work normally.

[0094] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0095] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automated testing device for PCB circuit boards, characterized in that, include: A rectangular workbench (1) is provided, with guide rods (2) fixed at each of the four corners of the workbench (1). A test box (3) is slidably mounted on the guide rods (2), and a test assembly for inspecting PCB boards is installed inside the test box (3). A support plate (7) is fixed to the end of the guide rod (2) away from the workbench (1). A spring (4) is fixed between the support plate (7) and the detection box (3). The spring (4) is sleeved on the outside of the guide rod (2). A drive assembly for driving the detection box (3) to move vertically is installed on the side of the support plate (7) facing the detection box (3). The workbench (1) has an assembly slot on the side facing the inspection box (3). A conveying component is installed in the assembly slot, and positioning components for PCB board correction are installed on both sides of the conveying component.

2. The automated testing device for PCB circuit boards according to claim 1, characterized in that, The positioning assembly includes two sets of pushers that are rotatably mounted on the worktable (1) and arranged opposite to each other; The pushing component includes two sleeve plates (29) rotatably mounted on the workbench (1). A slide plate (30) is slidably mounted inside the sleeve plate (29). A roller (31) is rotatably mounted on one end of the slide plate (30) away from the sleeve plate (29). A return spring is fixed on one end of the slide plate (30) away from the roller (31). The other end of the return spring is fixed to the bottom inside the sleeve plate (29). The bottom of the workbench (1) is rotatably mounted with a gear set (16) that meshes with each other. The gear set (16) is connected to the shafts of the two sleeve plates (29) respectively through two first transmission belts (11).

3. The automated testing device for PCB circuit boards according to claim 2, characterized in that, The positioning component also includes two limiting strips (28) disposed on the edge of the assembly groove, and each of the two limiting strips (28) has a notch in the center position. A clamping plate (27) is slidably installed in the notch. A third transmission rod (35) is rotatably installed on the side of the clamping plate (27) away from the other clamping plate (27), passing through the worktable (1) and rotatably connected to the worktable (1). One end of the third transmission rod (35) is coaxially fixed with an elastic wheel (26). The bottom of the workbench (1) is rotatably mounted with a second transmission rod (14). One end of the second transmission rod (14) is coaxially fixed with a first ratchet gear (15). The other end of the second transmission rod (14) is connected to the third transmission rod (35) through a bevel gear set (13). The detection box (3) is fixed with a first pawl plate (12) that cooperates with the first ratchet gear (15) on the side facing the workbench (1). The workbench (1) is provided with a through groove for the first pawl plate (12) to pass through.

4. The automated testing device for PCB circuit boards according to claim 3, characterized in that, The detection assembly includes a trigger (21) and an integrated detection plate (22) that are slidably installed inside the detection box (3); The trigger (21) is fixed to the second spring (25) installed inside the detection box (3), and four contact plates arranged in a rectangle are fixed on the side of the trigger (21) away from the second spring (25); The integrated detection board (22) is provided with a plurality of pin slots (33) on the side facing the workbench (1), and the integrated detection board (22) is also electrically connected to the analysis device (23) fixed on the top of the detection box (3); The bottom of the detection box (3) is provided with an inlet for the PCB board to enter, and the edge of the inlet is provided with a wedge-shaped surface. The detection box (3) is also equipped with a trigger switch (36) that cooperates with the trigger (21). The trigger switch (36) is electrically connected to the analysis device (23).

5. An automated testing device for PCB circuit boards according to claim 4, characterized in that, The edge of the pin groove (33) is set outward, and a detection ring is provided in the outward portion of the pin groove (33). The detection ring is electrically connected to the bending analyzer (32) integrated on the integrated detection board (22).

6. An automated testing device for PCB circuit boards according to claim 4, characterized in that, The conveying assembly includes two conveying rollers (20) rotatably mounted in the assembly slot, the two conveying rollers (20) being connected by a conveyor belt (6), and a plurality of support rollers (34) are also rotatably mounted at equal intervals in the assembly slot; A second ratchet plate (17) is also fixed on one side of the detection box (3). The second ratchet plate (17) cooperates with a second ratchet gear (18) rotatably mounted on one side of the workbench (1). The shaft of the second ratchet gear (18) is connected to the conveyor roller (20) through a second transmission belt (19).

7. An automated testing device for PCB circuit boards according to claim 1, characterized in that, The drive assembly includes a first transmission rod (9) rotatably mounted on the bottom of the support plate (7), and a plurality of cams (8) are coaxially fixed on the first transmission rod (9); A motor (5) is fixed on one side of the support plate (7), and the output shaft of the motor (5) is coaxially fixed with the first transmission rod (9).

8. An automated testing device for PCB circuit boards according to claim 5, characterized in that, A control panel (10) is also installed on one side of the testing box (3). The control panel (10) is electrically connected to the analysis device (23), the integrated testing board (22), and the bending analyzer (32). The control panel (10) is also electrically connected to a computer.

9. An automated inspection method for PCB boards, wherein the automated inspection method for PCB boards employs the automated inspection device for PCB circuit boards as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: The PCB board is transported by the conveying components in conjunction with the production line conveying equipment to the bottom of the inspection box (3); Step 2: Drive the detection box (3) to descend vertically using the drive component, and use the positioning component to correct and position the PCB board so that the PCB board is directly below the detection box (3); Step 3: The detection components inside the detection box (3) are used to detect whether the pins of the PCB board are bent and whether the PCB board can work normally.

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