A device for repairing and maintaining the brush plating of via openings in PCB boards.

Abstract

This invention belongs to the field of PCB board maintenance technology, and specifically discloses a device for repairing and maintaining the via openings of PCB boards by brush plating. The device includes a fixing head with a trapezoidal convex bottom. A transmission cavity is located near the top of the fixing head, and a transmission component is installed inside the transmission cavity. An adjustment cavity is located in the middle of the fixing head, and a feedback component is installed inside the adjustment cavity. A grinding component is located near the outer edge of the bottom of the fixing head. When the device is placed directly above a solder pad and the handle is pressed down, the grinding ring on the grinding component contacts the top of the solder pad during the pressing process, grinding it. Simultaneously, the grinding component, driven by the transmission component, cleans up the metal debris generated during grinding. After grinding, the feedback component is triggered to inject electroplating solution into the ground area on the top of the solder pad for electroplating.

Description

Technical Field

[0001] This invention relates to the field of PCB board maintenance technology, and in particular to a device for repairing and maintaining the vias of PCB boards by brush plating. Background Technology

[0002] A PCB is a circuit board for integrated circuits. Most PCBs currently in use are single-sided boards, where components are concentrated on one side and wires are concentrated on the other. PCBs make circuits miniaturized and more intuitive, playing an important role in the mass production of fixed circuits and the optimization of electrical appliance layout.

[0003] When soldering PCB boards to electronic components, they are connected through pads. When maintaining a faulty PCB board, it is necessary to separate the damaged electronic components from the pads, and at the same time, grind the solder on the pads clean and then perform electroplating repair. However, fine debris is generated during grinding. This debris remains on the pads, which will cause uneven electroplating on the ground surface of the pads, making it easy to produce cold solder joints during subsequent soldering. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a device for repairing and maintaining the brush plating of the guide hole opening of a PCB board.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for repairing and maintaining the brush plating of the guide hole of a PCB board, comprising a fixing head, the bottom of the fixing head being a trapezoidal protrusion, a transmission cavity being provided inside the fixing head near the top, a transmission component being provided inside the transmission cavity, an adjustment cavity being provided inside the fixing head at the middle, a feedback component being provided inside the adjustment cavity, and a grinding component being provided at the bottom of the fixing head near the outer surface edge.

[0006] A handle sleeve is fixed to the top of the fixing head. A storage cavity is opened inside the fixing head above the adjustment cavity. A through hole is opened at the bottom of the storage cavity in the middle, which leads to the interior of the adjustment cavity. A flexible tube is provided on the outer surface of the fixing head. One end of the flexible tube extends into the transmission cavity and is connected to the storage cavity.

[0007] Preferably, the bottom surface of the regulating cavity has a guide hole that extends to the bottom of the fixing head at the middle. The bottom of the fixing head has multiple side channels that are equidistantly arranged. One end of each side channel extends to the outside of the fixing head, and the other end of each side channel is connected to the guide hole.

[0008] Preferably, the transmission assembly includes an internal gear ring, which is rotatably connected to the inner bottom surface of the transmission cavity near the edge. A motor is fixed to one side of the inner wall of the transmission cavity, and a drive gear is fixed to the output end of the motor. The drive gear meshes with the internal gear ring, and an annular friction groove is formed on the outer surface of the internal gear ring.

[0009] Preferably, the outer surface of the fixed head is provided with multiple side air chambers at equal intervals along the circumferential direction. Each of the multiple side air chambers is provided with a drive shaft. The top of each of the multiple drive shafts slides through into the interior of the drive cavity, and the bottom of each of the multiple drive shafts slides through into the bottom of the fixed head near the edge of the outer surface. Friction wheels are fixed at the top and bottom of each of the multiple drive shafts, and the outer surface of the friction wheel located at the top of each of the multiple drive shafts is in frictional contact with the inner wall of the annular friction groove.

[0010] Preferably, multiple vortex blades are fixed at equal intervals along the circumferential direction on the outer surface of multiple drive shafts. The multiple vortex blades are all located inside the side air chambers. Air passages are opened on the bottom surface of the multiple side air chambers near one edge. The bottom of the multiple air passages extends to the stepped protruding edge of the bottom of the fixed head. Filter pads are provided between the inner walls of the multiple side air chambers. The middle part of the multiple drive shafts and the filter pads are mutually penetrated. Sealing plates are slidably sealed between the inner walls on both sides of the multiple side air chambers. Air outlets are opened on one side of the multiple sealing plates.

[0011] Preferably, the grinding assembly includes a grinding ring. The bottom of the grinding ring has multiple grinding channels equidistantly spaced along the circumferential direction. The grinding ring is slidably fitted onto the outer surface of the trapezoidal protrusion at the bottom of the fixed head. Multiple guide plates are equidistantly fixed along the circumferential direction near the edge of the outer surface of the top of the grinding ring. A trapezoidal opening is provided on one side of each guide plate near the top edge of the grinding ring. A drive ring is rotatably mounted at the bottom of the fixed head near the edge of the outer surface. The outer surfaces of the friction wheels located at the bottom of the multiple drive shafts are in frictional contact with the inner wall of the drive ring.

[0012] Preferably, an annular cavity is formed on the inner wall of the fixed head near the bottom edge. A lifting ring is slidably arranged between the inner walls of the annular cavity near the bottom edge. The bottom of the annular cavity extends to the bottom of the fixed head near the outer edge. Multiple limiting slides are equidistantly formed on the outer surface of the drive ring along the circumferential direction. One side of multiple guide plates is slidably engaged inside the limiting slides. The tops of multiple guide plates extend into the interior of the annular cavity and are fixed to the bottom of the drive ring. A sliding ring is rotatably arranged on the inner top surface of the annular cavity. A pressing spring is fixed to the bottom of the sliding ring. The bottom of the pressing spring is slidably attached to the top of the lifting ring.

[0013] Preferably, the feedback component includes a guide rod, which is slidably disposed between the inner walls of the through hole. The bottom of the guide rod extends into the adjustment cavity. A connecting block is slidably disposed between the inner walls of the adjustment cavity and fixed to the outer surface of the guide rod. A branch pipe is fixed to the bottom of the guide rod, the bottom of the branch pipe extends into the guide hole, and the outer surface of the branch pipe is in contact with the inner wall of the guide hole. The top of the branch pipe extends above the guide rod. Multiple side openings are equidistantly opened on the outer surface of the guide rod along the circumferential direction. All the side openings are connected to the inside of the branch pipe. The top of the guide rod extends into the storage cavity.

[0014] Preferably, the inner wall of the adjustment cavity is provided with three side constraint channels that extend into the annular cavity at equal intervals along the circumferential direction. A lever is slidably arranged between the inner walls of the two sides of the three side constraint channels. One end of each lever is fixed to the outer surface of the connecting block near the top edge, and the other end of each lever extends into the interior of the annular cavity and is located above the connecting block.

[0015] Preferably, a return spring is fixed between the inner top surface of the adjustment cavity and the top of the connecting block. Multiple receiving holes that penetrate into the airway are equidistantly opened between the inner walls of the adjustment cavity along the circumferential direction. A hollow silicone ring is provided between the inner walls of the adjustment cavity at the top edge. A silicone expansion head is provided inside each of the multiple receiving holes. One end of each of the multiple silicone expansion heads is connected to the hollow silicone ring. The expansion end of each of the multiple silicone expansion heads is located on one side of the airway.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When using this invention, place the device directly above the solder pad and press down on the handle sleeve. During the pressing process, the grinding ring on the grinding component contacts the top of the solder pad to grind it. At the same time, when the grinding component is driven by the transmission component, it will also clean up the metal debris generated during grinding. After grinding is completed, the feedback component is triggered to inject electroplating liquid into the ground area on the top of the solder pad for electroplating treatment.

[0018] 2. When the transmission component is working in this invention, the friction wheel at the bottom of the transmission shaft can drive the grinding component to work when it rotates. When the transmission shaft rotates, it will drive multiple vortex blades to rotate and generate an adsorption force on the airflow. At this time, the airflow at the bottom of the fixed head, together with the chips generated by cutting, can be adsorbed into the interior of the side air chamber through the air passage. Then, the metal chips are separated and collected by the filter pad.

[0019] 3. When the grinding component is working in this invention, the grinding ring rotates and the fixed head presses down. At this time, the grinding ring will slide upward relative to the fixed head during the grinding process. It can be ensured that the grinding ring can slide horizontally upward while rotating and grinding. When the guide plate slides upward, it will drive the lifting ring to slide upward in the annular cavity. When sliding, the feedback component will be triggered to work.

[0020] 4. When the feedback component is working in this invention, after the connecting block slides to the upper part of the adjustment cavity, it will squeeze the hollow silicone ring, which will increase the pressure inside the hollow silicone ring. This will cause the water inside the ring to flow into the silicone expansion head. The water flowing into the silicone expansion head will cause the expansion end of the silicone expansion head to expand into the air passage and block the air passage. At the same time, the top of the guide rod extends into the storage cavity. The electroplating solution inside the storage cavity can enter the branch pipe through the side port, then flow from the bottom of the branch pipe into the bottom of the guide hole, and finally be evenly distributed on the grinding surface from the bottom of the fixed head to the top of the solder pad through the side flow channel. Attached Figure Description

[0021] Figure 1 This invention provides a front-view three-dimensional structural diagram of a PCB board guide hole brush plating repair and maintenance device.

[0022] Figure 2 The present invention provides a bottom-view three-dimensional structural diagram of a PCB board guide hole brush plating repair and maintenance device.

[0023] Figure 3 This invention provides a side-section perspective view of a three-dimensional structure of a PCB board guide hole brush plating repair and maintenance device.

[0024] Figure 4 This invention provides a three-dimensional cross-sectional view of another side of a device for repairing and maintaining the vias of a PCB board using brush plating.

[0025] Figure 5 This invention provides a cross-sectional three-dimensional structural diagram of a PCB board guide hole brush plating repair and maintenance device.

[0026] Figure 6 For the present invention Figure 2 A magnified view of a portion of point A in the middle;

[0027] Figure 7 For the present invention Figure 3 A magnified view of a portion of point B in the middle;

[0028] Figure 8 For the present invention Figure 3 A magnified view of a portion of point C in the middle;

[0029] Figure 9 For the present invention Figure 3 A magnified view of a portion of point D;

[0030] Figure 10 Comparison images showing the difference before and after applying the brush plating repair and maintenance device for the guide hole designed according to the present invention.

[0031] In the diagram: 1. Fixed head; 2. Handle sleeve; 3. Side air chamber; 4. Sealing plate; 5. Air outlet; 6. Grinding ring; 7. Drive ring; 8. Guide plate; 9. Trapezoidal opening; 10. Limiting slide; 11. Hose; 12. Transmission chamber; 13. Motor; 14. Internal gear ring; 15. Annular friction groove; 16. Friction wheel; 17. Drive gear; 18. Storage chamber; 19. Guide rod; 20. Side opening; 21. Branch pipe; 22. 23. Air passage; 24. Guide hole; 25. Drive shaft; 26. Filter pad; 27. Vortex blade; 28. Annular cavity; 29. ​​Slip ring; 30. Pressing spring; 31. Lifting ring; 32. Adjusting cavity; 33. Connecting block; 34. Return spring; 35. Hollow silicone ring; 36. Storage hole; 37. Silicone expansion head; 38. Side constraint channel; 39. Paddle plate; 40. Grinding flow channel; 41. Through hole; 42. Side flow channel. Detailed Implementation

[0032] 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.

[0033] Please see Figure 1-9 The present invention provides a technical solution: a device for repairing and maintaining the guide hole of a PCB board by brush plating, including a fixing head 1, the bottom of the fixing head 1 is shaped like a trapezoidal protrusion, a transmission cavity 12 is provided inside the fixing head 1 near the top, a transmission component is provided inside the transmission cavity 12, an adjustment cavity 31 is provided inside the fixing head 1 at the middle, a feedback component is provided inside the adjustment cavity 31, and a grinding component is provided at the bottom of the fixing head 1 near the edge of the outer surface.

[0034] A handle sleeve 2 is fixed to the top of the fixed head 1. A storage cavity 18 is opened inside the fixed head 1 above the adjustment cavity 31. A through hole 40 is opened at the middle of the bottom of the storage cavity 18, which extends into the adjustment cavity 31. A flexible tube 11 is provided on the outer surface of the fixed head 1. One end of the flexible tube 11 extends into the transmission cavity 12 and communicates with the storage cavity 18. A guide hole 23 is opened at the middle of the bottom surface of the adjustment cavity 31, which extends into the bottom of the fixed head 1. Multiple side channels 41 are opened at equal intervals at the bottom of the fixed head 1. One end of each side channel 41 extends into the outside of the fixed head 1, and the other end of each side channel 41 communicates with the guide hole 23.

[0035] The effect achieved is as follows: First, the pipe supplying the external electroplating solution is connected to the hose 11. When electroplating the pads on the PCB board, the device is placed directly above the pads and the handle sleeve 2 is pressed down. During the pressing process, the grinding ring 6 on the grinding component contacts the top of the pad and grinds it. At the same time, the grinding component is driven by the transmission component to clean up the metal debris generated during grinding. After grinding is completed, the feedback component is triggered to inject the electroplating solution into the ground area on the top of the pad for electroplating treatment.

[0036] like Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the transmission assembly includes an internal gear ring 14, which is rotatably connected to the inner bottom surface of the transmission cavity 12 near the edge. A motor 13 is fixed to one inner wall of the transmission cavity 12, and a drive gear 17 is fixed to the output end of the motor 13. The drive gear 17 meshes with the internal gear ring 14. An annular friction groove 15 is formed on the outer surface of the internal gear ring 14. Multiple side air chambers 3 are equidistantly formed along the circumferential direction on the outer surface of the fixed head 1. A transmission shaft 24 is provided inside each of the multiple side air chambers 3. The top of the multiple transmission shafts 24 slides through the interior of the transmission cavity 12, and the bottom of the multiple transmission shafts 24 slides through the bottom of the fixed head 1 near the edge of the outer surface. Friction wheels 1 are fixed to the top and bottom of the multiple transmission shafts 24. 6. The outer surfaces of the friction wheels 16 located at the top of the multiple drive shafts 24 are all in frictional contact with the inner wall of the annular friction groove 15. Multiple vortex blades 26 are fixed at equal intervals along the circumferential direction on the outer surfaces of the multiple drive shafts 24. The multiple vortex blades 26 are all located inside the side air chambers 3. Air passages 22 are opened on the bottom surface of the multiple side air chambers 3 near one side edge. The bottom of the multiple air passages 22 is connected to the stepped protruding edge of the bottom of the fixed head 1. Filter pads 25 are provided between the inner walls of the multiple side air chambers 3. The middle part of the multiple drive shafts 24 and the filter pads 25 are connected to each other. Sealing plates 4 are slidably sealed between the inner walls on both sides of the multiple side air chambers 3. Air outlets 5 are opened on one side of the multiple sealing plates 4.

[0037] The effect achieved is that starting the motor 13 can drive the drive gear 17 to rotate. Since the drive gear 17 meshes with the internal gear ring 14, it can drive the internal gear ring 14 to rotate. When the internal gear ring 14 rotates, the outer surface of the friction wheel 16 at the top of the transmission shaft 24 rubs against the inner wall of the annular friction groove 15 on the outer surface of the internal gear ring 14, so it can drive the friction wheel 16 to rotate, which in turn drives the transmission shaft 24 and the friction wheel 16 at the bottom to rotate. When the friction wheel 16 at the bottom of the transmission shaft 24 rotates, it can drive the grinding assembly to work. When the transmission shaft 24 rotates, it will drive multiple vortex blades 26 to rotate, generating an adsorption force on the airflow. At this time, the airflow at the bottom of the fixed head 1, together with the chips generated by cutting, can be adsorbed into the interior of the side air chamber 3 through the air passage 22, and then the metal chips are separated and collected by the filter pad 25.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, the grinding assembly includes a grinding ring 6. Multiple grinding channels 39 are equidistantly spaced along the circumferential direction at the bottom of the grinding ring 6. The grinding ring 6 is slidably fitted onto the outer surface of the trapezoidal protrusion at the bottom of the fixed head 1. Multiple guide plates 8 are equidistantly fixed along the circumferential direction near the edge of the outer surface at the top of the grinding ring 6. A trapezoidal opening 9 is provided on one side of each guide plate 8 near the top edge of the grinding ring 6. A drive ring 7 is rotatably mounted near the edge of the outer surface at the bottom of the fixed head 1. The outer surfaces of the friction wheels 16 located at the bottom of the multiple drive shafts 24 are in frictional contact with the inner wall of the drive ring 7. A groove is provided on the inner wall of the fixed head 1 near the bottom edge. An annular cavity 27 has a lifting ring 30 slidably disposed between its inner walls and near its bottom edge. The bottom of the annular cavity 27 extends to the bottom of the fixed head 1 near its outer edge. Multiple limiting slides 10 are equidistantly provided on the outer surface of the drive ring 7 along the circumferential direction. One side of multiple guide plates 8 is correspondingly slidably engaged inside the limiting slides 10. The tops of multiple guide plates 8 extend into the interior of the annular cavity 27 and are fixed to the bottom of the drive ring 7. A sliding ring 28 is rotatably disposed on the top surface inside the annular cavity 27. A pressing spring 29 is fixed to the bottom of the sliding ring 28, and the bottom of the pressing spring 29 slides against the top of the lifting ring 30.

[0039] The effect achieved is that, due to the friction wheel 16 at the bottom of the drive shaft 24 rubbing against the inner side of the drive ring 7, the drive ring 7 can be driven to rotate. At the same time, since the drive ring 7 slides and engages with one side of the guide plate 8 through the limiting slide 10 opened on the outer surface, it can drive multiple guide plates 8 and grinding ring 6 to rotate. When the grinding ring 6 rotates and grinds, the fixed head 1 presses down. At this time, the grinding ring 6 will slide upward relative to the fixed head 1 during the grinding process. Through the limiting slide 10 sliding and engaging with one side of the guide plate 8, it can be ensured that the grinding ring 6 can also slide horizontally upward while rotating and grinding. When the guide plate 8 slides upward, it will drive the lifting ring 30 to slide upward towards the annular cavity 27. When sliding, it will trigger the operation of the feedback component. When the lifting ring 30 slides upward, it will compress the pressing spring 29. The elastic force generated by the compression of the pressing spring 29 facilitates the subsequent reset of the grinding component.

[0040] like Figure 3 , Figure 4 and Figure 9 As shown, the feedback assembly includes a guide rod 19, which is slidably disposed between the inner walls of the through hole 40. The bottom of the guide rod 19 extends into the adjustment cavity 31. A connecting block 32 is slidably disposed between the inner walls of the adjustment cavity 31 and fixed to the outer surface of the guide rod 19. A branch pipe 21 is fixed to the bottom of the guide rod 19, and the bottom of the branch pipe 21 extends into the guide hole 23. The outer surface of the branch pipe 21 is in contact with the inner wall of the guide hole 23. The top of the branch pipe 21 extends above the guide rod 19. Multiple side openings 20 are equidistantly opened along the circumferential direction on the outer surface of the guide rod 19. All the side openings 20 are connected to the interior of the branch pipe 21. The top of the guide rod 19 extends into the storage cavity 18. Three side constraint channels 37 are equidistantly opened along the circumferential direction on the inner wall of the adjustment cavity 31, penetrating into the annular cavity 27. Three levers 38 are slidably arranged between the inner walls of the two sides of the side constraint channel 37. One end of each lever 38 is fixed to the outer surface of the connecting block 32 near the top edge. The other end of each lever 38 extends into the interior of the annular cavity 27 and is located above the connecting block 32. A return spring 33 is fixed between the inner top surface of the adjustment cavity 31 and the top of the connecting block 32. Multiple receiving holes 35 are equidistantly opened in the circumferential direction between the inner walls of the adjustment cavity 31, penetrating into the interior of the airway 22. A hollow silicone ring 34 is arranged between the inner walls of the adjustment cavity 31 at the top edge. A silicone expansion head 36 is arranged inside each of the multiple receiving holes 35. One end of each silicone expansion head 36 is connected to the hollow silicone ring 34. The expansion end of each silicone expansion head 36 is located on one side of the airway 22.

[0041] The effect is that when the lifting ring 30 slides upward, it drives the lever 38 to slide upward inside the side constraint channel 37, which in turn drives the connecting block 32 to slide upward inside the adjustment cavity 31. When the connecting block 32 slides to the top inside the adjustment cavity 31, it squeezes the hollow silicone ring 34, increasing the pressure inside the hollow silicone ring 34. This causes the water inside the hollow silicone ring 34 to flow into the silicone expansion head 36. The water flowing into the silicone expansion head 36 causes the expansion end of the silicone expansion head 36 to expand into the air passage 22, blocking the air passage 22. At the same time, the top of the guide rod 19 extends into the storage cavity 18. In the storage cavity 18, the electroplating solution can enter the branch pipe 21 through the side port 20, and then flow from the bottom of the branch pipe 21 into the bottom of the guide hole 23. Finally, it is evenly distributed on the grinding surface from the bottom of the fixed head 1 to the top of the solder pad through the side flow channel 41. During the process of pressing the fixed head 1 downward, when the top of the connecting block 32 exerts a squeezing force on the hollow silicone ring 34, the guide plate 8 slides along the limiting slide 10 to the trapezoidal opening 9, releasing the locking constraint force of the limiting slide 10 on one side of the guide plate 8. At this time, the drive ring 7 cannot drive the grinding ring 6 to grind by driving the guide plate 8 to rotate.

[0042] Working principle: When using this device, starting the motor 13 drives the drive gear 17 to rotate. Since the drive gear 17 meshes with the internal gear ring 14, it drives the internal gear ring 14 to rotate. When the internal gear ring 14 rotates, the outer surface of the friction wheel 16 at the top of the transmission shaft 24 rubs against the inner wall of the annular friction groove 15 on the outer surface of the internal gear ring 14, thus driving the friction wheel 16 to rotate. This, in turn, drives the transmission shaft 24 and the friction wheel 16 at the bottom to rotate. The rotation of the friction wheel 16 at the bottom of the transmission shaft 24 drives the grinding assembly to work. Furthermore, the rotation of the transmission shaft 24 drives multiple vortex blades 26 to rotate, generating an adsorption force on the airflow. At this time, the blades located at the bottom of the fixed head 1... The airflow, along with the cutting debris, is drawn into the side air chamber 3 through the air passage 22. The metal debris is then separated and collected by the filter pad 25. Because the friction wheel 16 at the bottom of the drive shaft 24 is in frictional contact with the inner side of the drive ring 7, it can drive the drive ring 7 to rotate. Simultaneously, because the drive ring 7 slides and engages with one side of the guide plate 8 through the limiting slide 10 on its outer surface, it can drive the multiple guide plates 8 and the grinding ring 6 to rotate. Furthermore, when the grinding ring 6 rotates and grinds, the fixed head 1 presses downwards. At this time, the grinding ring 6 slides upwards relative to the fixed head 1 during grinding. The sliding engagement of the limiting slide 10 with one side of the guide plate 8 ensures that the grinding ring 6 rotates and grinds... Simultaneously, it can slide horizontally upwards. When the guide plate 8 slides upwards, it will drive the lifting ring 30 to slide upwards towards the annular cavity 27. During this sliding, the feedback component will be triggered, and the lifting ring 30 will compress the pressing spring 29 as it slides upwards. The elastic force generated by the compression of the pressing spring 29 facilitates the subsequent reset of the grinding component. When the lifting ring 30 slides upwards, it will drive the dial plate 38 to slide upwards inside the side constraint channel 37, which will simultaneously drive the connecting block 32 to slide upwards inside the adjustment cavity 31. When the connecting block 32 slides to the upper part of the adjustment cavity 31, it will squeeze the hollow silicone ring 34, increasing the pressure inside the hollow silicone ring 34, thereby causing the water inside to flow into the silicone expansion head 36. The flow of water into the silicone expansion head 36 causes the expansion end of the silicone expansion head 36 to expand into the air passage 22, blocking the air passage 22. At the same time, the guide plate 8 slides along the limiting slide 10 to the trapezoidal opening 9, releasing the locking constraint force of the limiting slide 10 on one side of the guide plate 8. At this time, the drive ring 7 cannot drive the grinding ring 6 to grind by rotating the guide plate 8. At this time, the top of the guide rod 19 extends into the storage cavity 18, and the electroplating liquid inside the storage cavity 18 can enter the interior of the branch pipe 21 through the side opening 20, and then flow from the bottom of the branch pipe 21 into the bottom of the guide hole 23. Finally, it is evenly distributed on the grinding surface from the bottom of the fixed head 1 to the top of the solder pad through the side flow channel 41.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A through hole plating repair maintenance device for PCB board, characterized in that, The utility model provides a grinding head, including fixed head (1), the bottom of fixed head (1) is the terrace protruding shape, the inside of fixed head (1) is close to the top and is opened transmission cavity (12), transmission cavity (12) is provided with transmission assembly in the inside, the inside of fixed head (1) is opened adjusting cavity (31) at the middle, adjusting cavity (31) is provided with feedback assembly in the inside, the bottom of fixed head (1) is close to the edge of outer surface and is provided with grinding assembly, The top of fixed head (1) is fixed with handle cover (2), the inside of fixed head (1) is opened storage cavity (18) above adjusting cavity (31), the bottom of storage cavity (18) is opened through -going hole (40) to the inside of adjusting cavity (31) at the middle, the outer surface of fixed head (1) is provided with hose (11), one end of hose (11) is through -going to the inside of transmission cavity (12) and is mutually communicated with storage cavity (18), transmission assembly includes inner gear ring (14), inner gear ring (14) is rotatably connected in the inside bottom near the edge of transmission cavity (12), one side inner wall of transmission cavity (12) is fixed with motor (13), the output of motor (13) is fixed with driving gear (17), driving gear (17) is mutually engaged with inner gear ring (14), the outer surface of inner gear ring (14) is opened annular friction groove (15), the outer surface of fixed head (1) is opened a plurality of side air chamber (3) along the circumferential direction equidistance, the inside of a plurality of side air chamber (3) is provided with transmission shaft (24), the top of a plurality of transmission shaft (24) is slid through -going to the inside of transmission cavity (12), the bottom of a plurality of transmission shaft (24) is slid through -going to the bottom of fixed head (1) close to the edge of outer surface, the top and bottom of a plurality of transmission shaft (24) are fixed with friction wheel (16), the outer surface of friction wheel (16) at the top of a plurality of transmission shaft (24) is all correspondingly with annular friction groove (15) inner wall friction and is combined, the outer surface of a plurality of transmission shaft (24) is all equidistance fixed with a plurality of eddy current blades (26) along the circumferential direction, a plurality of eddy current blades (26) are all correspondingly located in the inside of side air chamber (3), the inside bottom near one side edge of a plurality of side air chamber (3) is all opened air channel (22), the bottom of a plurality of air channel (22) is all correspondingly through -going to the terrace protruding edge at the bottom of fixed head (1), the inner wall between a plurality of side air chamber (3) is all provided with filter pad (25), the middle part of a plurality of transmission shaft (24) and filter pad (25) is mutually through -going, the both sides inner wall between a plurality of side air chamber (3) is all slid and is sealed and is provided with sealing plate (4), one side of a plurality of sealing plate (4) is all opened air outlet (5); The grinding assembly includes a grinding ring (6), the bottom of which is provided with a plurality of grinding flow channels (39) equidistantly in the circumferential direction, the grinding ring (6) is sleeved on the outer surface of the stepped protruding part at the bottom of the fixed head (1), a plurality of guide plates (8) are fixed equidistantly in the circumferential direction at the top of the grinding ring (6) near the edge of the outer surface, a trapezoidal port (9) is formed at one side of each of the plurality of guide plates (8) near the top edge of the grinding ring (6), a driving ring (7) is rotatably arranged at the bottom of the fixed head (1) near the edge of the outer surface, the outer surface of the friction wheel (16) at the bottom of the plurality of transmission shafts (24) is frictionally attached to the inner wall of the driving ring (7), and the feedback assembly includes a guide rod (19), the guide rod (19) is slidably arranged between the inner walls of the through hole (40), the bottom of the guide rod (19) extends into the adjusting cavity (31), a connecting block (32) is slidably arranged between the inner walls of the adjusting cavity (31), the connecting block (32) is fixed on the outer surface of the guide rod (19), the bottom of the guide rod (19) is fixed with a branch pipe (21), the bottom of the branch pipe (21) extends into the guide hole (23), and the outer surface of the branch pipe (21) is attached to the inner wall of the guide hole (23), the top of the branch pipe (21) extends above the guide rod (19), a plurality of side ports (20) are equidistantly formed in the circumferential direction on the outer surface of the guide rod (19), each of the plurality of side ports (20) is communicated to the inside of the branch pipe (21), and the top of the guide rod (19) extends into the storage cavity (18).

2. A hole plating repair maintenance device for PCB board according to claim 1, characterized in that: The inside bottom surface of the adjusting cavity (31) is provided with a guide hole (23) penetrating to the bottom of the fixed head (1) at the middle, a plurality of side flow channels (41) are equidistantly formed in the bottom of the fixed head (1), one end of each of the plurality of side flow channels (41) penetrates to the outside of the fixed head (1), and the other end of each of the plurality of side flow channels (41) is communicated with the guide hole (23).

3. A hole plating repair maintenance device for PCB board according to claim 2, characterized in that: The inner wall of the fixed head (1) is provided with an annular cavity (27) near the bottom edge, a jacking ring (30) is slidably arranged between the inner walls of the annular cavity (27) near the bottom edge, the bottom of the annular cavity (27) penetrates to the bottom of the fixed head (1) near the outer side edge, a plurality of limiting sliding channels (10) are equidistantly formed in the circumferential direction on the outer surface of the driving ring (7), one side of each of the plurality of guide plates (8) is slidably clamped in the limiting sliding channel (10), the top of each of the plurality of guide plates (8) extends into the annular cavity (27), and is fixed at the bottom of the driving ring (7), a sliding ring (28) is rotatably arranged on the inside top surface of the annular cavity (27), the bottom of the sliding ring (28) is fixed with a pressing spring (29), and the bottom of the pressing spring (29) is slidably attached to the top of the jacking ring (30).

4. A hole plating repair maintenance device for PCB board according to claim 3, characterized in that: The inner wall of the adjusting cavity (31) is equidistantly provided with three side constraint channels (37) penetrating into the annular cavity (27) in the circumferential direction, two side inner walls of the three side constraint channels (37) are both slidably provided with a lever (38), one end of the three levers (38) is correspondingly fixed to the outer surface of the connecting block (32) near the top edge, and the other end of the three levers (38) is correspondingly extended into the annular cavity (27) and located above the connecting block (32).

5. A hole plating repair maintenance device for PCB board according to claim 4, characterized in that: The inside top surface of the adjusting cavity (31) and the top of the connecting block (32) are fixed with a return spring (33), the inner wall of the adjusting cavity (31) is equidistantly provided with a plurality of receiving holes (35) penetrating into the air channel (22) in the circumferential direction, the inner wall of the adjusting cavity (31) is provided with a hollow silica gel ring (34) at the top edge, the inside of the plurality of receiving holes (35) is provided with a silica gel expansion head (36), one end of the plurality of silica gel expansion heads (36) is correspondingly communicated with the hollow silica gel ring (34), and the expansion end of the plurality of silica gel expansion heads (36) is located on one side of the air channel (22).

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