PID circuit board test tool equipment and test method thereof

Abstract

The invention relates to the technical field of testing tools, in particular to PID circuit board testing tool equipment and a testing method thereof.The PID circuit board testing tool equipment comprises a rectangular plate, an electrifying plate is slidably connected to the upper portion of the rectangular plate, a pressure plate is slidably connected to the upper portion of the electrifying plate, and a stabilizing assembly is arranged in the middle of the bottom of the pressure plate; the equipment is high in circuit board testing precision and good in testing accuracy, accurate adjustment of the position of the circuit board is achieved before testing is started, the positioning precision of the circuit board is guaranteed, and the follow-up testing accuracy and testing efficiency of the circuit board are guaranteed; meanwhile, the descending height of the electrifying plate can be correspondingly adjusted according to the thicknesses of different circuit boards, and the test precision and the test efficiency of the induction copper needle on the circuit board are met; and after the test is completed, impurities on the surface of the circuit board are sucked and cleaned by means of air pressure change in the quick discharge cylinder, the impurities blocked at the bottom of the filter screen can be subjected to fixed-point vibration recovery after cleaning is completed, the recovery efficiency is high, and the impurity removal effect is good.

Description

Technical Field

[0001] This invention relates to the field of testing fixture technology, and in particular to a PID circuit board testing fixture and its testing method. Background Technology

[0002] Circuit boards are also known as ceramic circuit boards, circuit boards, circuit boards, thick copper boards, impedance boards, ultra-thin circuit boards, ultra-thin circuit boards, printed circuit boards, etc. Circuit boards make circuits miniaturized and more intuitive, and play an important role in the mass production of fixed circuits and the optimization of electrical appliance layout.

[0003] Chinese invention patent 202111156641.2 relates to a circuit board testing device, which includes a material placement stage that supports a circuit board and can rotate, two probe devices that can move along three axes, and an image capture device that can move along three axes to align the electrical contacts of the circuit board; the circuit board testing device has low testing accuracy and poor testing efficiency.

[0004] Chinese invention patent 202111302533.1 relates to a circuit board testing device, characterized in that it includes: a testing board placement part and a circuit board placement part; self-locking clamps are respectively provided at opposite ends of the testing board placement part, and the testing board is placed between the self-locking clamps; the self-locking clamps are provided with buckles; this circuit board testing device cannot clean the circuit board, thereby reducing the testing accuracy.

[0005] Existing circuit boards are typically tested by workers using clamps to connect and power them on. This testing method is prone to damaging the circuit boards, and it is also slow, time-consuming, and labor-intensive.

[0006] When testing a circuit board, the board may be tilted, which reduces the accuracy of the test. Existing technologies lack the function of adjusting the position of the circuit board, making the operation difficult and the positioning accuracy low.

[0007] When the specifications and thickness of the circuit board are different, the amount of downward movement of the circuit board and the test position are different. However, the existing technology lacks precise adjustment of the downward movement test height of the circuit board.

[0008] Existing technologies lack the function of recycling and processing impurities on the surface of circuit boards during and after testing. Furthermore, some impurities that are blocked inside the filter cannot be recycled at specific points during the impurity recycling process, thereby reducing the cleanliness of the equipment and the accuracy of circuit board testing. Summary of the Invention

[0009] In view of this, the present invention aims to provide a PID circuit board testing fixture and testing method to solve or alleviate the technical problems existing in the prior art.

[0010] To solve the above technical problems, this application proposes a PID circuit board testing fixture, including a rectangular plate, an energized plate slidably connected above the rectangular plate, a pressure plate slidably connected above the energized plate, a stabilizing component provided at the bottom center of the pressure plate, and a pneumatic mechanism provided at the rear center of the top of the rectangular plate.

[0011] The rectangular plate has spring cylinders on both sides of the bottom center, and an electromagnetic plate is provided at the bottom of the inner part of the spring cylinder. A magnetic rod is slidably connected inside the spring cylinder, and the other end of the magnetic rod passes through the rectangular plate and is hinged to the bottom of the energized plate.

[0012] The stabilizing component includes a sleeve, the top of which is fixedly connected to the bottom of a pressure plate. A sealing plate is slidably connected inside the sleeve, a distance sensor is provided on the top of the sealing plate, and a stabilizing rod is provided on the bottom of the sealing plate.

[0013] The pressure plate has movable grooves on both sides of its bottom. A hanging plate is slidably connected inside the movable groove. Two sets of connecting cavities are symmetrically arranged inside the pressure plate. One end of the connecting cavity is connected to the movable groove, and the other end of the connecting cavity is connected to the sleeve. A connecting rod is slidably connected inside the connecting cavity, and the other end of the connecting rod is fixedly connected to the side wall of the hanging plate.

[0014] The pneumatic mechanism includes a quick exhaust cylinder, and exhaust pipes are respectively connected to both sides of the outer circumference of the quick exhaust cylinder.

[0015] This equipment not only enables precise adjustment of the circuit board position, but also adjusts the pressing distance according to circuit boards of different thicknesses. Furthermore, it can recycle impurities after the circuit board is tested, resulting in higher testing accuracy and better cleanliness.

[0016] A further feature of this invention is that four circular uprights are provided at the center of the top of the rectangular plate, and hexagonal blocks are provided at the top of each of the circular uprights. The same elastic plate mechanism is slidably sleeved on the outer circumference of the four circular uprights. Side uprights are provided on both sides of the rear end of the top of the rectangular plate. A fixing plate is provided at the top between two side uprights. A power mechanism is provided at the bottom center of the fixing plate. A pressing mechanism is provided at the top center of the fixing plate. A lifting mechanism is provided at the rear end of the top of the pressure plate.

[0017] A further feature of the present invention is that sliding round rods are provided on both sides of the rear end of the top of the rectangular plate, and fixed sleeve blocks are slidably sleeved on the outer circumference of the two sliding round rods. The fixed sleeve blocks are fixedly connected to the inside of the pressure plate. The pressure plate is made of transparent material. An installation hole is opened in the middle of the top of the rectangular plate, and an induction copper needle is provided on the inner wall of the installation hole. Stable base blocks are provided on both sides of the bottom of the rectangular plate.

[0018] A further feature of this invention is that the elastic plate mechanism includes a stabilizing sleeve plate, and multiple stabilizing sleeve plates are respectively sleeved on the outer circumference of the circular upright. The inner diameter of the stabilizing sleeve plate is larger than the outer diameter of the circular upright. The multiple stabilizing sleeve plates are fixedly connected to the side wall of the energized plate. A rectangular through hole is opened at the rear end of the top of the energized plate. A pressure spring is provided inside each of the two spring cylinders. The two ends of the pressure spring are fixedly connected to the side walls of the electromagnetic plate and the magnetic rod, respectively. The electromagnetic plate and the magnetic rod have the same magnetism on their facing end faces.

[0019] A further feature of the present invention is that the pressing mechanism includes two mounting blocks, which are welded and fixed to the top of the fixing plate. A connecting shaft is provided in the middle of one side between the two mounting blocks. A manual lever is rotatably mounted in the middle of the outer circumference of the connecting shaft. A groove is opened at the front end of the bottom of the manual lever. An anti-slip grip is provided at the front end of the manual lever. The front end and rear end of the inner wall of the groove at the bottom of the manual lever are provided with the same mounting shaft. A semi-circular block is rotatably sleeved in the middle of the outer circumference of the mounting shaft. A counterweight rubber block is fixedly mounted at the bottom of the semi-circular block by screws.

[0020] A further feature of the present invention is that the power mechanism includes a load-bearing plate, and bases are provided on both sides of the front end of the top of the load-bearing plate. The top of the two bases is provided with the same servo motor. One end of the output shaft of the servo motor is provided with a gear. The lifting mechanism includes a connecting plate, which is fixed to the rear end of the top of the pressure plate. A folded plate is provided at the top of the rear end of the connecting plate. A plurality of toothed blocks are provided at equal intervals at the rear end of the folded plate. The plurality of toothed blocks mesh with the gear.

[0021] A further feature of the present invention is that elliptical blocks are provided on both sides of the rear end of the pressure plate, and insertion holes are opened in the middle of the top of the two elliptical blocks. Sleeve rods are provided on both sides of the rear end of the top of the rectangular plate. The two sleeve rods pass through the insertion holes of the elliptical blocks on the same side, and push springs are respectively sleeved on the bottom of the outer circumference of the two sleeve rods.

[0022] A further feature of this invention is that the quick exhaust cylinder is fixed to the middle of the rear end of the top of the rectangular plate, and a rubber pressure block is provided inside the quick exhaust cylinder. The rubber pressure block is made of rubber. A rectangular connecting rod is provided at the bottom of the front end of the folded plate. The front end of the rectangular connecting rod is welded and fixed to the rear end of the connecting plate, and the bottom of the rectangular connecting rod is fixed to the top of the rubber pressure block. A filter screen is provided inside the exhaust pipe, and fixing holes are opened at the front ends of both hanging plates. The other ends of the two exhaust pipes pass through and are fixed in the fixing holes of the same side hanging plate.

[0023] A further feature of the present invention is that a connecting spring is provided on the top of the sealing plate, the top of the connecting spring is fixedly connected to the bottom of the pressure plate, the distance sensor is used to test the distance the sealing plate moves, the gap between the two sets of moving grooves matches the width of the energized plate, and two sets of impurity collection grooves are symmetrically provided on the top of the rectangular plate, the impurity collection grooves matching the two side walls opposite to the moving grooves.

[0024] A method for testing a PID circuit board, wherein the method utilizes a PID circuit board testing fixture to test the PID circuit board, comprising the following steps:

[0025] S1: Place the circuit board to be tested on top of the magnetic rod of the power board. The magnetic rod of the pressure plate drives the magnetic rod of the power board to descend and makes the magnetic rod of the stabilizing rod contact the circuit board, thus achieving the testing effect.

[0026] S2: When the circuit board is placed at an angle, the distance value detected by the distance sensor increases, the current of the electromagnetic plate magnetic rod on that side decreases, the magnetic rod moves downward and drives the magnetic rod of the energized plate to tilt, the magnetic rod of the pressure plate moves downward and drives the circuit board to move obliquely downward at the top of the magnetic rod of the energized plate with the help of wind.

[0027] S3: When the test thickness of the circuit board increases, the current flowing through the electromagnetic plate magnetic rod increases, and the magnetic rod drives the magnetic rod of the energized plate to move downward a greater distance.

[0028] S4: After the test is completed, the current of the electromagnetic plate magnetic rod increases and drives the magnetic rod to move upward. The upward movement of the magnetic rod drives the magnetic rod of the energized plate to move upward. The magnetic rod of the energized plate squeezes the magnetic rod of the stabilizing rod to move upward. The magnetic rod of the connecting rod moves and drives the magnetic rod of the hanging plate to move laterally. The magnetic rod of the hanging plate drives the magnetic rod of the exhaust pipe to move laterally and cleans the top of the circuit board.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. The device of this invention is equipped with a servo motor, a pressure plate, a stabilizing component, and a power board. In use, the descending pressure plate drives the descending stabilizing component to descend, which presses against the circuit board. This causes the power board and magnetic rod to descend, compressing the pressure spring. As a result, the sensing copper needle passes through the rectangular hole of the power board and contacts the circuit board placed on the power board, thus connecting the power supply and achieving the testing effect. It can be used in both automatic and manual modes to improve testing speed and save time. At the same time, the contact of the copper needle reduces the risk of damage to the circuit board.

[0031] 2. The device of the present invention is equipped with components such as a quick exhaust cylinder, a rectangular connecting rod, a rubber pressure block, and an exhaust pipe. During the descent process, the rubber pressure block is pushed to move inside the quick exhaust cylinder, compressing the gas and expelling the gas from the inside of the exhaust pipe. The other end of the exhaust pipe blows onto the surface of the circuit board below as the pressure plate descends, performing dust removal treatment on the surface and preventing excessive dust from affecting the use of the circuit board.

[0032] 3. This invention, by incorporating an electromagnetic plate and magnetic rod, achieves high testing precision and accuracy for circuit boards. Precise adjustment of the circuit board's position before testing ensures accurate positioning, guaranteeing subsequent testing accuracy and efficiency. Furthermore, the descent height of the energized plate can be adjusted according to the thickness of different circuit boards, meeting the precision and efficiency requirements of induction copper testing. After testing, the pressure change inside the quick-extraction cylinder effectively removes impurities from the circuit board surface, increasing the cleaning area and effect. After cleaning, impurities clogged at the bottom of the filter can be recovered through targeted vibration, resulting in high recovery efficiency and excellent impurity removal. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 This is a side perspective view of the present invention;

[0035] Figure 3 This is a three-dimensional structural diagram of the pressure plate of the present invention;

[0036] Figure 4 This is a three-dimensional structural diagram of the back of the present invention;

[0037] Figure 5 This is a top-view three-dimensional structural diagram of the present invention;

[0038] Figure 6 This is a side half-section perspective view of the present invention;

[0039] Figure 7 This is a frontal half-section perspective view of the present invention;

[0040] Figure 8 This is a bottom-view three-dimensional structural diagram of the present invention;

[0041] Figure 9 This is a side-view, bottom-view three-dimensional structural diagram of the present invention;

[0042] Figure 10 This is a front sectional view of the pressure plate according to the second embodiment of the present invention.

[0043] In the diagram: 1. Rectangular plate; 2. Side plate; 3. Pressure plate; 4. Sliding rod; 5. Connecting plate; 6. Mounting block; 7. Sleeve shaft; 8. Manual rod; 9. Fixing plate; 10. Fixing sleeve block; 11. Circular upright; 12. Electrical board; 13. Stabilizing base block; 14. Hexagonal block; 15. Stabilizing sleeve plate; 16. Anti-slip grip; 17. Counterweight rubber block; 18. Semicircular block; 19. Mounting shaft; 20. Push spring; 21. Folded plate; 22. Sleeve rod; 23. Spring cylinder; 24. Tooth block; 25. Load-bearing plate; 26. Exhaust pipe; 27. Quick exhaust cylinder; 28. Elliptical block; 29. ​​Gear; 30. Servo motor; 31. Base; 32. Magnetic insert rod; 33. Rubber pressure block; 34. Induction copper needle; 35. Pressure spring; 36. Rectangular connecting rod; 37. Stabilizing component; 38. Hanging plate; 39. Electromagnetic plate; 40. Sleeve; 41. Connecting spring; 42. Sealing plate; 43. Stabilizing rod; 44. Connecting cavity; 45. Connecting rod; 46. Moving groove. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] First Embodiment

[0046] Reference Figure 1-9A PID circuit board testing fixture includes a rectangular plate 1. A control unit is located on one side of the rectangular plate 1, which electrically controls various electrical components. An energizing plate 12 is slidably connected above the rectangular plate 1, and a pressure plate 3 is slidably connected above the energizing plate 12. Four circular uprights 11 are located in the middle of the top of the rectangular plate 1, and hexagonal blocks 14 are located on the top of each of the circular uprights 11. The outer circumference of the four circular uprights 11 is slidably fitted with the same elastic plate mechanism. When the elastic plate mechanism is not subjected to downward compression, it will be counteracted by the pressure spring 35 inside the lower spring cylinder 23, pushing the magnetic plug 32 to rise to the maximum height and then reset. Side uprights 2 are located on both sides of the top rear end of the rectangular plate 1. A fixed plate 9 is located at the top between the two side uprights 2, and a pressing mechanism is located in the middle of the top of the fixed plate 9. The pressing mechanism is a manually operated descent mechanism. When the automatic descent mechanism fails, it can be operated through the pressing mechanism to ensure multiple operation modes. A power mechanism is located in the middle of the bottom of the fixed plate 9. Both sides of the pressure plate 3 are provided with sliding round rods 4, and the outer circumference of the two sliding round rods 4 are slidably sleeved with fixed sleeves 10. The fixed sleeves 10 are fixedly connected to the inside of the pressure plate 3. The pressure plate 3 is made of transparent material. The transparent material of the pressure plate 3 is to facilitate the observation of the circuit board placed below and to avoid the observation of the status of the circuit board during manual operation. The rear end of the top of the pressure plate 3 is provided with a lifting mechanism. When the power mechanism starts to run, it will drive the lifting mechanism through the gear 29 in the power mechanism to run, forming a downward effect of driving the lifting mechanism to push the power board 12 below to fall. The middle of the rear end of the top of the rectangular plate 1 is provided with a pneumatic mechanism. The middle of the top of the rectangular plate 1 has a mounting hole, and the inner wall of the mounting hole is provided with a sensing copper needle 34. The two sides of the bottom of the rectangular plate 1 are provided with stabilizing base blocks 13. The middle of the bottom of the pressure plate 3 is provided with a stabilizing component 37. After falling to a certain position, the servo motor 30 will automatically stop rotating and will not press and damage the circuit board. After stopping, the sensing copper needle 34 will contact the circuit board to perform a power-on test.

[0047] The elastic plate mechanism includes a stabilizing sleeve 15, and multiple stabilizing sleeves 15 are respectively sleeved on the outer circumference of the circular upright 11. The inner diameter of the stabilizing sleeve 15 is larger than the outer diameter of the circular upright 11, so the stabilizing sleeve 15 can tilt on the outer surface of the circular upright 11. Multiple stabilizing sleeves 15 are fixedly connected to the side wall of the energized plate 12. By installing the stabilizing sleeves 15 around the energized plate 12, and all the stabilizing sleeves 15 are sleeved on the circular upright 11, the energized plate 12 will not be unstable. A rectangular through hole is opened at the rear end of the top of the energized plate 12.

[0048] A spring cylinder 23 is provided on both sides of the bottom center of the rectangular plate 1. An electromagnetic plate 39 is provided at the bottom of the inner part of the spring cylinder 23. A magnetic rod 32 is slidably connected inside the spring cylinder 23. The other end of the magnetic rod 32 passes through the rectangular plate 1 and is hinged to the bottom of the energized plate 12. A pressure spring 35 is provided inside the two spring cylinders 23. The two ends of the pressure spring 35 are fixedly connected to the side walls of the electromagnetic plate 39 and the magnetic rod 32, respectively. During the descent of the energized plate 12, the magnetic rod 32 will be driven to descend. The descending magnetic rod 32 will squeeze the pressure spring 35. After the energized plate 12 above loses the descent driving force, the pressure spring 35 will react on the magnetic rod 32 and push the energized plate 12 to rise and reset.

[0049] The pressing mechanism includes two mounting blocks 6, which are welded and fixed to the top of the fixed plate 9. A connecting shaft 7 is provided in the middle of one side between the two mounting blocks 6, and a manual lever 8 is rotatably mounted in the middle of the outer circumference of the connecting shaft 7. The front end of the bottom of the manual lever 8 has a groove, and the front end of the manual lever 8 has an anti-slip grip 16. The front end and rear end of the inner wall of the groove at the bottom of the manual lever 8 are provided with the same mounting shaft 19. When in use, the operator will rotate the manual lever 8 around the connecting shaft 7 using the anti-slip grip 16, which will cause the front end of the manual lever 8 to descend, pushing the rotatable counterweight rubber block 17 to descend. The descending counterweight rubber block 17 will contact the top of the connecting plate 5, and continuous pressing will press down on the connecting plate 5.

[0050] A semi-circular block 18 is rotatably sleeved on the middle of the outer circumference of the mounting shaft 19, and a counterweight rubber block 17 is fixedly installed at the bottom of the semi-circular block 18 by screws. The counterweight rubber block 17 is installed by rotating through the outer circumference of the mounting shaft 19. When tilting and descending, it will adjust its direction due to the contact force at its bottom, so that it fits against the top of the connecting plate 5, which facilitates the operation of the downward pressure.

[0051] The power mechanism includes a load-bearing plate 25, and bases 31 are provided on both sides of the front end of the top of the load-bearing plate 25. The top of the two bases 31 is equipped with the same servo motor 30, and one end of the output shaft of the servo motor 30 is equipped with a gear 29. The servo motor 30 drives the gear 29 to rotate, providing power to it. Automatic operation can be performed by using the servo motor 30. Only the staff needs to replace the circuit board, which greatly speeds up the testing speed.

[0052] The lifting mechanism includes a connecting plate 5, which is fixed to the rear end of the top of the pressure plate 3. A folded plate 21 is provided at the top of the rear end of the connecting plate 5, and a number of toothed blocks 24 are provided at equal intervals at the rear end of the folded plate 21. The toothed blocks 24 mesh with the gear 29. The folded plate 21 is provided at the top of the connecting plate 5, which facilitates contact with the gear 29 and allows it to approach the gear 29. The toothed blocks 24 on the back of the folded plate 21 mesh with the gear 29. When the servo motor 30 runs, it drives the gear 29 to rotate. The rotating gear 29 drives the toothed blocks 24 and the folded plate 21 on which they are installed to descend.

[0053] Elliptical blocks 28 are provided on both sides of the rear end of the pressure plate 3, and insertion holes are opened in the middle of the top of the two elliptical blocks 28. Sleeve rods 22 are provided on both sides of the rear end of the top of the rectangular plate 1, and the two sleeve rods 22 pass through the insertion holes of the elliptical blocks 28 on the same side. Push springs 20 are respectively sleeved on the bottom of the outer circumference of the two sleeve rods 22. When the downward pushing force is lost above the pressure plate 28, the push spring 20 at the rear end will push the elliptical blocks 28 in reaction, pushing the elliptical blocks 3 to move upward, thereby driving the pressure plate 3 to rise and reset.

[0054] The pneumatic mechanism includes a quick-release cylinder 27, which is fixed to the middle of the top rear end of the rectangular plate 1. A rubber pressure block 33 is provided inside the quick-release cylinder 27. The rubber pressure block 33 is made of rubber. The descending pressure plate 3 will drive the rectangular connecting rod 36 to descend, and at the same time, it will drive the rubber pressure block 33 to descend inside the quick-release cylinder 27, forming a gas compression effect. The rubber pressure block 33 will fit against the inner wall of the quick-release cylinder 27, making it easy to squeeze and discharge the gas.

[0055] A rectangular connecting rod 36 is provided at the bottom of the front end of the folded plate 21. The front end of the rectangular connecting rod 36 is welded and fixed to the rear end of the connecting plate 5, and the bottom of the rectangular connecting rod 36 is fixed to the top of the rubber pressure block 33. Exhaust pipes 26 are respectively connected through the two sides of the outer circumference of the quick exhaust cylinder 27. The exhaust pipes 26 are equipped with filters. The bottom sides of the pressure plate 3 are equipped with hanging plates 38, and the front ends of the two hanging plates 38 are opened with fixing holes. The other ends of the two exhaust pipes 26 pass through and are fixed in the fixing holes of the hanging plate 38 on the same side. The rectangular connecting rod 36 rises or falls under the action of the folded plate 21. When it falls, it presses the rubber pressure block 33. The rubber pressure block 33 falls and squeezes the air inside the quick exhaust cylinder 27. The air inside is discharged through the two exhaust pipes 26. At the same time, the other ends of the two exhaust pipes 26 are located inside the fixing holes of the hanging plates 38 at the bottom of the pressure plate 3. They rise and fall with the pressure plate 3. The discharged gas will have a wind-powered dust removal effect on the surface of the circuit board below.

[0056] In use, the circuit board to be tested is first placed on top of the power board 12. Simultaneously, the servo motor 30 starts running, driving the gear 29 to rotate. The gear 29 meshes with the toothed block 24 at the rear end of the folding plate 21, causing the folding plate 21 and connecting plate 5 to descend. The descending connecting plate 5, through the stabilizing component 37, pushes the circuit board and its power board 12 downwards. Simultaneously, stabilizing sleeves 15 are installed around the power board 12, and these sleeves 15 are all fitted onto the circular upright 11, preventing instability of the power board 12. The stabilizing component 37 is made of plastic, and its lower end is top-mounted... The part is made of soft rubber. The induction copper pin 34 mounted on the rectangular plate 1 descends through the rectangular hole of the power board 12 and contacts the circuit board to form a connection, thus achieving the test effect. After the servo motor 30 completes the test operation, when the pressure plate 3 loses its downward driving force, the push spring 20 at the rear end will push the elliptical block 28 upward, thereby driving the pressure plate 3 to rise and reset. At the same time, after the power board 12 loses its downward driving force, the pressure spring 35 will act on the magnetic plug 32, and push the power board 12 upward to reset, so that the staff can replace the circuit board.

[0057] Without using the servo motor 30, the operator manually pulls the anti-slip grip 16, causing the manual lever 8 to rotate and descend on the sleeve shaft 7. The descending manual lever 8 drives the counterweight rubber block 17 to descend. The counterweight rubber block 17 is mounted on the outer circumference of the mounting shaft 19 in a rotating manner. When descending at an angle, it will adjust its direction due to the contact force at its bottom, thereby pressing the top of the connecting plate 5 and driving the pressure plate 3 to descend, forming the same test effect as the operation of the servo motor 30. During the descent of the power board 12, it will drive the magnetic plug 32 to descend as well. The descending magnetic plug 32 will squeeze the pressure spring 35. After the power board 12 above loses its descent driving force, the pressure spring 35 will react to the magnetic plug 32 and push the power board 12 to rise and reset. After resetting, the operator takes out the tested circuit board and puts the untested circuit board back in.

[0058] As the connecting plate 5 descends, it causes the folding plate 21 and its rectangular connecting rod 36 to descend as well. This, in turn, pushes the rubber pressure block 33 inside the quick-release cylinder 27 to descend and move. The rubber pressure block 33 is made of rubber, allowing its outer circumference to fit against the metal inner wall of the exhaust pipe 26, thus propelling the gas inside to move rapidly out of the exhaust pipe 26 and exit from the other end fixed to the hanging plate 38. The rectangular connecting rod 36 rises or falls under the influence of the folding plate 21, pressing the rubber pressure block 33 as it descends. The rubber pressure block 33 will descend and compress the air inside the quick exhaust cylinder 27. The air inside will be discharged through two exhaust pipes 26. At the same time, the other end of the two exhaust pipes 26 is located inside the fixing hole of the hanging plate 38 at the bottom of the pressure plate 3. It will rise and fall with the pressure plate 3. The discharged gas will have a wind-powered dust removal effect on the surface of the circuit board below. During the process of the rubber pressure block 33 being driven to rise by the rectangular connecting rod 36, it will draw gas into the interior of the quick exhaust cylinder 27 through the exhaust pipes 26 to ensure the next discharge blowing effect.

[0059] Second Embodiment

[0060] Reference Figure 10 When testing the circuit board on top of the energized board 12, existing technologies lack positioning and correction functions when the circuit board is tilted, which can easily affect the testing accuracy of subsequent circuit boards. Furthermore, when the energized board 12 moves, causing the circuit board to move and come into contact with the induction copper pin 34, the required height of the energized board 12 varies depending on the thickness of the circuit board. Existing technologies lack height adjustment functions for the energized board 12, thus reducing the accuracy of the induction copper pin 34's circuit board insertion test. Simultaneously, existing equipment lacks a thorough and comprehensive impurity recovery function for the circuit board. When the test is completed and impurities on the circuit board surface are extracted using the exhaust pipe 26, the impurities flow directly back into the quick-exhaust cylinder 27, affecting the cleaning of subsequent circuit boards. The aforementioned equipment lacks the ability to clean the exhaust pipe 26 and remove internal impurities, reducing impurity recovery capabilities. To address these issues, the PID circuit board testing fixture also includes a filter screen inside the exhaust pipe 26 to filter and recover impurities drawn in along the exhaust pipe 26.

[0061] The stabilizing component 37 includes a sleeve 40, the top of which is fixedly connected to the bottom of the pressure plate 3. A sealing plate 42 is slidably connected inside the sleeve 40. A distance sensor is provided on the top of the sealing plate 42 to test the distance between the top of the sealing plate 42 and the top of the pressure plate 3, thereby indirectly obtaining the displacement value of the sealing plate 42. A stabilizing rod 43 is provided at the bottom of the sealing plate 42. The bottom of the stabilizing rod 43 extends out of the sleeve 40, and the bottom of the stabilizing rod 43 presses against the top of the circuit board. This not only effectively tests the placement accuracy of the circuit board, but also promotes the flow of gas inside the sleeve 40.

[0062] The pressure plate 3 has two sliding grooves 46 on both sides of its bottom rear end. A hanging plate 38 is slidably connected inside the sliding groove 46. A T-shaped groove is provided at the top of the sliding groove 46, and a T-shaped block is provided at the top of the hanging plate 38. The T-shaped groove and the T-shaped block match, ensuring the stability and accuracy of the lateral movement of the hanging plate 38. Two sets of connecting cavities 44 are symmetrically arranged inside the pressure plate 3. One end of the connecting cavity 44 is connected to the sliding groove 46, and the other end is connected to the sleeve 40. When the sealing plate 42 moves upward inside the sleeve 40... During movement, the gas inside the sleeve 40 enters the connecting cavity 44 along the top of the sleeve 40. A connecting rod 45 is slidably connected inside the connecting cavity 44, and the other end of the connecting rod 45 is fixedly connected to the side wall of the hanging plate 38. The gas pressure inside the connecting cavity 44 increases and drives the connecting rod 45 to move outward. The movement of the connecting rod 45 synchronously drives the hanging plate 38 to move, and the movement of the hanging plate 38 drives the exhaust pipe 26 to move. This not only realizes the air extraction position of the exhaust pipe 26, thereby improving the uniformity of impurity recovery, but also assists in the careful correction of the position of the circuit board, improving the testing accuracy.

[0063] The electromagnetic plate 39 and the magnetic rod 32 have the same magnetism on their opposite ends. Therefore, when the electromagnetic plate 39 is energized and becomes magnetic, the magnetic repulsion force of the electromagnetic plate 39 on the magnetic rod 32 causes the magnetic rod 32 to stretch the pressure spring 35 upward.

[0064] A connecting spring 41 is provided on the top of the sealing plate 42. The top of the connecting spring 41 is fixedly connected to the bottom of the pressure plate 3. The connecting spring 41 enables the sealing plate 42 to move and stabilize inside the sleeve 40. The gap between the two sets of moving grooves 46 matches the width of the energized plate 12. Therefore, as the hanging plate 38 inside the moving groove 46 moves laterally, the distance between the exhaust pipe 26 and the side wall of the circuit board is adjusted. In addition, the tilting of the energized plate 12 is used to correct the position of the circuit board. Two sets of impurity collection grooves are symmetrically provided on the top of the rectangular plate 1. The impurity collection grooves match the opposite side walls of the moving groove 46. When the hanging plate 38 moves along the moving groove 46 to the opposite side walls, the exhaust pipe 26 is disengaged from the top of the energized plate 12. The exhaust pipe 26 blows the impurities blocked at the bottom of the filter screen into the impurity collection groove for recycling. This improves the subsequent recycling effect of impurities while ensuring the recycling of impurities on the surface of the circuit board.

[0065] In use, the device is installed according to the first embodiment, and the circuit board is placed on top of the power board 12. Then, the control unit controls the electromagnetic plate 39 to be energized, and the energizing current continuously increases. Then, the magnetic repulsion force of the electromagnetic plate 39 on the magnetic rod 32 drives the magnetic rod 32 to move upward. The magnetic rod 32 moves upward and drives the power board 12 and the circuit board at the top to move upward. When the circuit board and the bottom of the stabilizing rod 43 are pressed and contacted each other, the circuit board continues to drive the stabilizing rod 43 to move upward. When the stabilizing rod 43 moves upward, it drives the sealing plate 42 at the top to press the connecting spring 41 inside the sleeve 40 and move upward. At this time, the distance value measured by the distance sensor changes. When the distance change values ​​measured by multiple sets of distance sensors are all equal, it means that the circuit board is stably on top of the power board 12. When the distance change values ​​measured by multiple sets of distance sensors are not equal, it means that the circuit board on top of the power board 12 is in a positional deviation state and the position of the circuit board needs to be adjusted.

[0066] Meanwhile, when the distance value measured by the distance sensor on one side is greater than the preset distance value, such as on the right side, it indicates that the circuit board is not on the right side, that is, the circuit board has deviated to the left. Therefore, it is necessary to adjust the position of the circuit board on the top of the power board 12. First, the controller controls the current of the electromagnetic plate 39 on the right side to decrease. Then, under the elastic force of the connecting spring 41, the magnetic rod 32 is driven to move downward. The magnetic rod 32 moves downward and drives the top power board 12 and the circuit board to disengage from the squeezing contact state with the stabilizing rod 43, so as to avoid the stabilizing rod 43 affecting the reset of the circuit board. At the same time, the current of the electromagnetic plate 39 on the left side increases, and the magnetic repulsion force of the electromagnetic plate 39 on the magnetic rod 32 on the left side increases. With the help of the magnetic rod 32 moving upward, the top power board 12 tilts downward from left to right. Then, with the help of the circuit board's own gravity, it slides downward and resets.

[0067] Meanwhile, to improve the efficiency of the circuit board's downward movement on the top of the power board 12, the controller controls the servo motor 30 to start and drive the gear 29 to rotate. The rotation of the gear 29, through meshing with the toothed block 24, drives the connecting plate 5 and the rectangular connecting rod 36 to move downward. When the rectangular connecting rod 36 moves downward, it drives the bottom rubber pressure block 33 to move downward along the quick exhaust cylinder 27. The gas inside the quick exhaust cylinder 27 is discharged along the exhaust pipe 26. At the same time, when the connecting plate 5 moves downward, it drives the pressure plate 3 to move downward. The pressure plate 3 drives the bottom sleeve 40 to move downward. The sleeve 40 drives the stabilizing rod 43 to move downward. Since the circuit board tilts downward from left to right, the left stabilizing rod 43 and the left side of the circuit board... The top sides press against each other, and when the stabilizer bar 43 presses against the connecting spring 41 inside the sleeve 40 and moves downward, the gas inside the sleeve 40 enters the connecting cavity 44. The pressure inside the connecting cavity 44 increases and drives the connecting rod 45 to move outward. When the connecting rod 45 moves, it simultaneously drives the hanging plate 38 to move to the left. The hanging plate 38 then drives the left exhaust pipe 26 to move. The exhaust pipe 26 matches the left end of the circuit board. At the same time, when the gas discharged from the exhaust pipe 26 applies a force to the left side of the circuit board, combined with the force applied to the top of the circuit board by the stabilizer bar 43, the circuit board moves diagonally downward from left to right, thereby improving the adjustment accuracy and precision of the circuit board position.

[0068] Once the circuit board has moved to the optimal position, the controller controls the electromagnetic plate 39 to return to its original state, the circuit board disengages from the stabilizing rod 43, the controller controls the gear 29 to rotate, the pressure plate 3 drives the bottom sleeve 40 to move downward, the sleeve 40 drives the stabilizing rod 43 to move downward and drives the circuit board and the bottom energized plate 12 to move downward, the energized plate 12 moves downward and squeezes the magnetic insert 32 to move downward, and then the circuit board is tested with the help of the induction copper needle 34, improving the test accuracy and precision of the circuit board.

[0069] Simultaneously, when the stabilizer bar 43 and the top of the circuit board come into contact with each other, the gas inside the sleeve 40 enters the connecting cavity 44, and the connecting rod 45 drives the hanging plate 38 to move outward. The hanging plate 38 simultaneously drives the exhaust pipe 26 to move laterally. When the exhaust pipe 26 moves laterally, it works in conjunction with the exhaust of the gas inside the quick exhaust cylinder 27 to blow the top of the circuit board laterally, effectively increasing the blowing area, thereby improving the cleaning effect and cleaning area.

[0070] If the model or thickness of the circuit board changes, for example, if the thickness of the circuit board increases, the pressure plate 3 needs to drive the bottom stabilizing rod 43 and the power board 12 to move downward a greater distance, and the insertion distance of the sensing copper pin 34 to the circuit board increases, which can easily cause damage to the circuit board.

[0071] Therefore, the controller increases the current flowing through the electromagnetic plate 39. The electromagnetic plate 39, through the magnetic repulsion force on the magnetic rod 32, causes the magnetic rod 32 to stretch and connect to the spring 41 and move upward. The magnetic rod 32 causes the top energized plate 12 to move upward, and the energized plate 12 causes the top circuit board to move upward. This ensures that the insertion depth of the induction copper pin 34 into the circuit board meets the requirements, effectively achieving accurate testing of circuit boards of different models and heights.

[0072] After the circuit board test is completed, the controller stops the servo motor 30. Under the elastic force of the push spring 20, the pressure plate 3 moves upward quickly and resets. The corresponding rubber pressure block 33 moves upward inside the quick exhaust cylinder 27 and performs air extraction. External gas enters the quick exhaust cylinder 27 along the exhaust pipe 26. At this time, the output end of the exhaust pipe 26 is facing the top of the circuit board. With the help of this suction force, impurities on the top of the circuit board are recovered into the exhaust pipe 26. At the same time, the filter screen filters the impurities inside the exhaust pipe 26, effectively improving the impurity recovery effect of the circuit board.

[0073] Simultaneously, as the pressure plate 3 moves upward, in order to remove impurities from the top of the circuit board, the controller controls the electromagnetic plate 39 to be energized and magnetic. Then, the magnetic repulsion between the electromagnetic plate 39 and the magnetic rod 32 drives the magnetic rod 32 to move upward. The magnetic rod 32 drives the energized plate 12 at the top to move upward. The energized plate 12 drives the circuit board to move upward and squeeze it against the stabilizing rod 43. The stabilizing rod 43 squeezes the connecting spring 41 and moves it upward inside the sleeve 40. The gas inside the sleeve 40 enters the connecting cavity 44 and drives the connecting rod 45 to move outward. The connecting rod 45 drives the hanging plate 38 to move outward. The hanging plate 38 drives the exhaust pipe 26 to move laterally inside the moving groove 46, thereby adjusting the suction position of the exhaust pipe 26, improving the suction effect of the exhaust pipe 26 on the top of the circuit board, and ensuring the recovery and removal of impurities.

[0074] When the pressure plate 3 moves upward to its maximum distance under the force of the push spring 20 and stops moving, the exhaust pipe 26 is directly opposite the top of the circuit board, and the suction force inside the exhaust pipe 26 is lost. Therefore, the impurities and other debris blocking the bottom of the filter will fall directly to the top of the circuit board under their own weight, causing pollution. Therefore, the controller controls the current of the electromagnetic plate 39 to be further increased. Under the magnetic repulsion of the electromagnetic plate 39 on the magnetic rod 32, the magnetic rod 32 drives the top energized plate 12 to move further upward. The energized plate 12, through the circuit board, controls the stabilizing rod 43. The upward extrusion force further increases, and the distance that the stabilizing rod 43 presses against the connecting spring 41 inside the sleeve 40 increases. The force exerted by the gas inside the sleeve 40 on the connecting rod 45 inside the connecting cavity 44 increases to its maximum value. The connecting rod 45 drives the hanging plate 38 to move to both sides along the moving groove 46 to its maximum distance. The hanging plate 38 drives the exhaust pipe 26 to move to both sides to its maximum value. Then the exhaust pipe 26 is directly facing the impurity collection groove at the top of the rectangular plate 1. During this process, a suction force is still applied inside the exhaust pipe 26, thereby preventing impurities from falling off the filter screen inside the exhaust pipe 26.

[0075] Afterwards, the controller controls the electromagnetic plate 39 to stop increasing the current, so the height of the pressure plate 3 no longer changes. The impurities inside the exhaust pipe 26 fall into the collection tank under their own weight. Some of the impurities stuck inside the filter screen are moved up and down in a small range as the controller controls the electromagnetic plate 39 to increase or decrease the current. This causes the position of the energized plate 12 to move up and down in a small range, and the pressure plate 3 vibrates up and down. Under the action of this vibration, the quick exhaust cylinder 27 continuously applies suction and exhaust force. Under the action of this air pressure, the impurities stuck inside the filter screen are discharged into the collection tank, which effectively improves the recovery effect of impurities.

[0076] After all impurities inside the exhaust pipe 26 are recovered, the controller de-energizes the electromagnetic plate 39. Under the elastic force of the connecting spring 41, the magnetic rod 32 moves downward to return to its original position. The magnetic rod 32 moves the energized plate 12 and the circuit board downward to return to their original positions. At the same time, under the elastic force of the pushing spring 20, the pressure plate 3 moves downward to return to its original position. All structures return to normal operation. The circuit board is removed, and a new circuit board is replaced. The above process is repeated to complete the cleaning and impurity removal for precise testing of the circuit board.

[0077] This equipment offers high precision and accuracy in testing circuit boards. Before testing begins, it precisely adjusts the circuit board's position to ensure accurate positioning and guarantee the accuracy and efficiency of subsequent testing. It also adjusts the descent height of the energized board 12 according to the thickness of different circuit boards, simultaneously meeting the accuracy and efficiency requirements of the induction copper needles 34. After testing, it utilizes the internal air pressure changes of the quick-extraction cylinder 27 to suction and clean impurities from the circuit board surface, increasing the cleaning area and effect. After cleaning, it can also perform targeted vibration recovery of impurities clogged at the bottom of the filter, achieving high recovery efficiency and excellent impurity removal.

[0078] Third Embodiment

[0079] A method for testing a PID circuit board, comprising the following steps: The method utilizes a PID circuit board testing fixture to test the PID circuit board.

[0080] S1: Place the circuit board to be tested on top of the power board 12. The pressure plate 3 drives the power board 12 down and makes the stabilizing rod 43 contact the circuit board to achieve the testing effect.

[0081] S2: When the circuit board is placed at an angle, the distance value detected by the distance sensor increases, the current of the electromagnetic plate 39 on that side decreases, the magnetic rod 32 moves downward and drives the energized plate 12 to tilt, the pressure plate 3 moves downward and drives the circuit board to move obliquely downward on the top of the energized plate 12 with the help of wind.

[0082] S3: When the test thickness of the circuit board increases, the current of the electromagnetic plate 39 increases, and the magnetic rod 32 drives the energized plate 12 to move downward a greater distance.

[0083] S4: After the test is completed, the current of the electromagnetic plate 39 increases and drives the magnetic rod 32 to move upward. The magnetic rod 32 drives the energized plate 12 to move upward. The energized plate 12 squeezes the stabilizing rod 43 to move upward. The connecting rod 45 moves and drives the hanging plate 38 to move laterally. The hanging plate 38 drives the exhaust pipe 26 to move laterally and cleans the top of the circuit board.

[0084] By further defining the testing methods, the efficiency and stability of the PID circuit board testing fixtures can be effectively improved.

[0085] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PID circuit board testing fixture, comprising a rectangular board, characterized in that, An electric plate is slidably connected above the rectangular plate, and a pressure plate is slidably connected above the electric plate. A stabilizing component is provided at the bottom center of the pressure plate, and a pneumatic mechanism is provided at the rear center of the top of the rectangular plate. Both sides of the bottom center of the rectangular plate are provided with spring cylinders, and an electromagnetic plate is provided at the bottom of the inner part of the spring cylinder. A magnetic rod is slidably connected inside the spring cylinder, and the other end of the magnetic rod passes through the rectangular plate and is hinged to the bottom of the energized plate. The stabilizing component includes a sleeve, the top of which is fixedly connected to the bottom of a pressure plate. A sealing plate is slidably connected inside the sleeve, a distance sensor is provided on the top of the sealing plate, and a stabilizing rod is provided on the bottom of the sealing plate. The pressure plate has movable grooves on both sides of its bottom. A hanging plate is slidably connected inside the movable groove. Two sets of connecting cavities are symmetrically arranged inside the pressure plate. One end of the connecting cavity is connected to the movable groove, and the other end of the connecting cavity is connected to the sleeve. A connecting rod is slidably connected inside the connecting cavity, and the other end of the connecting rod is fixedly connected to the side wall of the hanging plate. The pneumatic mechanism includes a quick exhaust cylinder, and exhaust pipes are respectively connected to both sides of the outer circumference of the quick exhaust cylinder.

2. The PID circuit board testing fixture equipment according to claim 1, characterized in that, The rectangular plate has four circular uprights at the top center, and each of the circular uprights has a hexagonal block at its top. The outer circumference of the four circular uprights is slidably fitted with the same elastic plate mechanism. Side uprights are provided on both sides of the rear end of the top of the rectangular plate. A fixing plate is provided at the top between two side uprights. A power mechanism is provided at the bottom center of the fixing plate. A pressing mechanism is provided at the top center of the fixing plate. A lifting mechanism is provided at the rear end of the top of the pressure plate.

3. The PID circuit board testing fixture equipment according to claim 1, characterized in that, The rectangular plate has sliding round rods on both sides of the rear end of the top. The outer circumference of the two sliding round rods is slidably fitted with fixed sleeves. The fixed sleeves are fixedly connected to the inside of the pressure plate. The pressure plate is made of transparent material. The top of the rectangular plate has a mounting hole in the middle. The inner wall of the mounting hole is provided with a sensing copper needle. The bottom of the rectangular plate has stabilizing base blocks on both sides.

4. The PID circuit board testing fixture equipment according to claim 2, characterized in that, The elastic plate mechanism includes stabilizing sleeves, with multiple stabilizing sleeves respectively fitted onto the outer circumference of the circular upright. The inner diameter of the stabilizing sleeve is larger than the outer diameter of the circular upright. The multiple stabilizing sleeves are fixedly connected to the side wall of the energized plate. A rectangular through hole is opened at the rear end of the top of the energized plate. A pressure spring is provided inside each of the two spring cylinders. The two ends of the pressure spring are fixedly connected to the side walls of the electromagnetic plate and the magnetic rod, respectively. The electromagnetic plate and the magnetic rod have the same magnetism on their facing end faces.

5. The PID circuit board testing fixture equipment according to claim 2, characterized in that, The pressing mechanism includes two mounting blocks, which are welded and fixed to the top of the fixed plate. A connecting shaft is provided in the middle of one side between the two mounting blocks. A manual lever is rotatably mounted in the middle of the outer circumference of the connecting shaft. A groove is opened at the front end of the bottom of the manual lever. An anti-slip grip is provided at the front end of the manual lever. The front end and rear end of the inner wall of the groove at the bottom of the manual lever are provided with the same mounting shaft. A semi-circular block is rotatably sleeved in the middle of the outer circumference of the mounting shaft. A counterweight rubber block is fixedly mounted at the bottom of the semi-circular block by screws.

6. The PID circuit board testing fixture equipment according to claim 2, characterized in that, The power mechanism includes a load-bearing plate, and bases are provided on both sides of the front end of the top of the load-bearing plate. The top of the two bases is provided with the same servo motor. One end of the output shaft of the servo motor is provided with a gear. The lifting mechanism includes a connecting plate, which is fixed to the rear end of the top of the pressure plate. A folded plate is provided on the top of the rear end of the connecting plate. A number of toothed blocks are provided at equal intervals at the rear end of the folded plate. The number of toothed blocks mesh with the gear.

7. The PID circuit board testing fixture equipment according to claim 6, characterized in that, Both sides of the rear end of the pressure plate are provided with elliptical blocks, and the top center of each of the two elliptical blocks is provided with insertion holes. Both sides of the rear end of the top of the rectangular plate are provided with sleeve rods. The two sleeve rods pass through the insertion holes of the elliptical blocks on the same side, and push springs are respectively sleeved on the bottom of the outer circumference of the two sleeve rods.

8. The PID circuit board testing fixture equipment according to claim 6, characterized in that, The quick exhaust cylinder is fixed to the middle of the rear end of the top of the rectangular plate. A rubber pressure block is provided inside the quick exhaust cylinder. The rubber pressure block is made of rubber. A rectangular connecting rod is provided at the bottom of the front end of the folded plate. The front end of the rectangular connecting rod is welded and fixed to the rear end of the connecting plate. The bottom of the rectangular connecting rod is fixed to the top of the rubber pressure block. A filter screen is provided inside the exhaust pipe. Fixing holes are opened at the front ends of both hanging plates. The other ends of the two exhaust pipes pass through and are fixed in the fixing holes of the same side hanging plate.

9. The PID circuit board testing fixture equipment according to claim 1, characterized in that, The top of the sealing plate is provided with a connecting spring, the top of the connecting spring is fixedly connected to the bottom of the pressure plate, the distance sensor is used to detect the distance value of the sealing plate movement, the gap between the two sets of moving grooves matches the width of the energized plate, and the top of the rectangular plate is symmetrically provided with two sets of impurity collection grooves, which match the side walls opposite to the moving grooves.

10. A method for testing a PID circuit board, wherein the method utilizes a PID circuit board testing fixture as described in claim 1 to test the PID circuit board, characterized in that, Follow these steps: S1: Place the circuit board to be tested on top of the power board. The pressure plate drives the power board to descend and makes the stabilizing rod contact the circuit board, thus achieving the testing effect. S2: When the circuit board is placed at an angle, the distance value detected by the distance sensor increases, the current of the electromagnetic plate on that side decreases, the magnetic rod moves downward and drives the energized plate to tilt, the pressure plate moves downward and drives the circuit board to move obliquely downward on the top of the energized plate with the help of wind. S3: When the test thickness of the circuit board increases, the current flowing through the electromagnetic plate increases, and the magnetic rod drives the energized plate to move downward a greater distance. S4: After the test is completed, the current of the electromagnetic plate increases and drives the magnetic rod to move upward. The magnetic rod moves upward and drives the energized plate to move upward. The energized plate squeezes the stabilizing rod to move upward. The connecting rod moves and drives the hanging plate to move laterally. The hanging plate drives the exhaust pipe to move laterally and cleans the top of the circuit board.

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