A multilayer printed circuit board blind hole inspection device

Abstract

The utility model discloses a multilayer printed circuit board blind hole inspection device belongs to the field of circuit board, a multilayer printed circuit board blind hole inspection device, including equipment base, the top of equipment base is fixed with the U -shaped equipment frame, and the bottom of U -shaped equipment frame inside is provided with industrial camera, and the top of equipment base is provided with the clamping mechanism for circuit board clamping, and the top of equipment base still is provided with the turnover mechanism for clamping mechanism turnover, and the clamping mechanism includes the U -shaped frame, and the one end bolt fixing of U -shaped frame has the fourth drive motor, through the setting of clamping mechanism and turnover mechanism, makes two U -shaped clamping post can hold the circuit board of different size to the blind hole detection of circuit board, makes the circuit board can turn over, realizes the double -sided automatic detection of circuit board, eliminates the positioning error caused by manual turnover, reduces manual intervention, improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of circuit boards, and more specifically, to a device for inspecting blind holes in multilayer printed circuit boards. Background Technology

[0002] With the rapid development of electronic technology, multilayer printed circuit boards (PCBs) are increasingly widely used in electronic products. As modern electronic devices tend to be miniaturized and perform higher, PCB design has become more complex, with a significant increase in the use of blind vias and buried vias to achieve high-density interconnection. The quality of blind vias directly affects the electrical performance and reliability of the PCB; therefore, blind via inspection has become a critical step in the PCB manufacturing process. For example, patent (CN212568525U) discloses a blind hole inspection device for multilayer HDI printed circuit boards. The movable base and fixed clamp set on the conveyor belt can tightly clamp the circuit board and allow it to operate in the conveyor belt. The hollow outer tube and the connecting inner tube allow the dynamic camera to adjust its height to adapt to the size of the circuit board. The protective shell is equipped with an optical lens and an optical display screen, which allows light to pass through the circuit board and record the through holes for comparison to identify blind holes. When using the above technology, the following technical problems were found in the existing technology: blind holes may exist on both sides of the PCB. After completing the inspection of one side, traditional inspection equipment usually requires manual flipping of the circuit board to inspect the other side. This not only increases the operation time, but may also cause positioning deviation due to secondary clamping, affecting the consistency of the inspection results. To address this, we designed a blind hole inspection device for multilayer printed circuit boards to provide another technical solution to the above technical problems. Utility Model Content

[0003] 1. Technical problems to be solved To address the problems existing in the prior art, the purpose of this utility model is to provide a blind hole inspection device for multilayer printed circuit boards. It enables two U-shaped clamping posts to clamp circuit boards of different sizes, facilitating blind hole detection. It also allows the circuit boards to be flipped, achieving automatic double-sided inspection of the circuit boards, eliminating positioning errors caused by manual flipping, reducing manual intervention, and improving inspection efficiency.

[0004] 2. Technical Solution

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A device for inspecting blind vias on multilayer printed circuit boards includes a base, a U-shaped frame fixed to the top of the base, an industrial camera installed at the bottom of the U-shaped frame, a clamping mechanism for holding the circuit board on the top of the base, and a flipping mechanism for flipping the clamping mechanism on the top of the base.

[0007] Furthermore, the clamping mechanism includes a U-shaped frame, one end of which is bolted to a fourth drive motor, the output end of which is fixed to a second transverse threaded rod, and the end of the second transverse threaded rod away from the fourth drive motor is fixed to a third transverse threaded rod. Both the outer sides of the second and third transverse threaded rods are threaded to U-shaped clamping posts, and the threads of the second and third transverse threaded rods have opposite directions.

[0008] Furthermore, a partition is rotatably connected to the connection between the second and third transverse threaded rods via a bearing. The partition is located near one end of the U-shaped frame and is fixedly connected to the U-shaped frame.

[0009] Furthermore, a transverse block is fixed inside the U-shaped frame, and a transverse sliding groove is provided inside the U-shaped clamping column. The U-shaped clamping column and the U-shaped frame are slidably connected through the cooperation of the transverse block and the transverse sliding groove.

[0010] Furthermore, the flipping mechanism includes an L-shaped sliding seat, a vertical threaded rod is bolted to the top of the L-shaped sliding seat, a vertical sliding block is threaded to the outer side of the vertical threaded rod, a third drive motor is bolted to one end of the vertical sliding block, a U-shaped support seat is fixed to the end of the vertical sliding block away from the third drive motor, a longitudinal rotating roller is rotatably connected inside the U-shaped support seat, the output end of the third drive motor is connected to the longitudinal rotating roller via a track, and the longitudinal rotating roller is fixedly connected to the end of the U-shaped frame near the U-shaped frame.

[0011] Furthermore, a vertical slide rail is fixed to one end of the L-shaped sliding seat near the vertical sliding block, and the vertical sliding block is slidably connected to the vertical slide rail.

[0012] Furthermore, a first drive motor is bolted to one end of the equipment base, a first transverse threaded rod is fixed to the output end of the first drive motor, a rectangular slider is threaded to the outer side of the first transverse threaded rod, transverse light rods are fixed to both sides inside the equipment base, the transverse light rods penetrate the interior of the rectangular slider and are slidably connected to the rectangular slider, and the top of the rectangular slider is fixedly connected to an L-shaped sliding seat.

[0013] 3. Beneficial effects

[0014] Compared with existing technologies, the advantages of this utility model are: This solution, through the setting of clamping and flipping mechanisms, enables two U-shaped clamping columns to clamp circuit boards of different sizes, facilitating blind hole detection and allowing the circuit boards to be flipped for automatic double-sided detection. This eliminates positioning errors caused by manual flipping, reduces manual intervention, and improves detection efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the U-shaped equipment frame and industrial camera of this utility model; Figure 3 This is a schematic diagram of the structure of the first transverse threaded rod and the transverse smooth rod of this utility model; Figure 4 This is a schematic diagram of the rectangular slider and L-shaped sliding seat of this utility model; Figure 5 This is a schematic diagram of the structure of the second drive motor and the vertical threaded rod of this utility model; Figure 6 This is a schematic diagram of the vertical sliding block and U-shaped support base of this utility model; Figure 7 This is a schematic diagram of the vertical sliding block and the third drive motor of this utility model; Figure 8 This is a schematic diagram of the structure of the second and third transverse threaded rods of this utility model.

[0016] Explanation of the labels in the diagram: 1. Equipment base; 2. U-shaped equipment frame; 3. Industrial camera; 4. U-shaped clamping column; 5. First drive motor; 6. First transverse threaded rod; 7. Transverse guide rod; 8. Rectangular slider; 9. L-shaped sliding seat; 10. Second drive motor; 11. Vertical threaded rod; 12. Vertical slide rail; 13. Vertical sliding block; 14. U-shaped support seat; 15. Third drive motor; 16. Longitudinal rotating roller; 17. U-shaped frame; 18. Fourth drive motor; 19. Second transverse threaded rod; 20. Third transverse threaded rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] Example:

[0019] Please see Figure 1-8 A device for inspecting blind holes in multilayer printed circuit boards includes a device base 1, a U-shaped device frame 2 fixed on the top of the device base 1, an industrial camera 3 installed at the bottom inside the U-shaped device frame 2, a clamping mechanism for clamping the circuit board installed on the top of the device base 1, and a flipping mechanism for flipping the clamping mechanism on the top of the device base 1. The clamping mechanism includes a U-shaped frame 17, one end of which is bolted to a fourth drive motor 18. The output end of the fourth drive motor 18 is fixed to a second transverse threaded rod 19. The end of the second transverse threaded rod 19 away from the fourth drive motor 18 is fixed to a third transverse threaded rod 20. The outer sides of both the second transverse threaded rod 19 and the third transverse threaded rod 20 are threaded to U-shaped clamping posts 4. The threads of the second transverse threaded rod 19 and the third transverse threaded rod 20 have opposite directions. The connection between the second transverse threaded rod 19 and the third transverse threaded rod 20 is rotatably connected to a partition plate via a bearing. The partition plate is close to one end of the U-shaped frame 17 and is fixedly connected to the U-shaped frame 17, thereby making the connection between the second transverse threaded rod 19 and the third transverse threaded rod 20 more stable, so that the second transverse threaded rod 19 and the third transverse threaded rod 20 can rotate synchronously better. A transverse block is fixed inside the U-shaped frame 17, and a transverse sliding groove is provided inside the U-shaped clamping column 4. The U-shaped clamping column 4 and the U-shaped frame 17 are slidably connected through the cooperation of the transverse block and the transverse sliding groove. Through the setting of the transverse block and the transverse sliding groove, the U-shaped clamping column 4 can move laterally inside the U-shaped frame 17, so that the movement trajectory of the U-shaped clamping column 4 can be guided. Here, the operation of the fourth drive motor 18 enables the second transverse threaded rod 19 and the third transverse threaded rod 20 to rotate. The rotation of the second transverse threaded rod 19 and the third transverse threaded rod 20, through the setting of the transverse block, enables the U-shaped clamping column 4 to move inside the U-shaped frame 17, thereby making the two U-shaped clamping columns 4 move in opposite directions, thereby enabling the two U-shaped clamping columns 4 to clamp the circuit board, thus enabling this device to adapt to circuit boards of different sizes. The flipping mechanism includes an L-shaped sliding seat 9, with a vertical threaded rod 11 bolted to the top of the L-shaped sliding seat 9. A vertical sliding block 13 is threaded to the outer side of the vertical threaded rod 11. A third drive motor 15 is bolted to one end of the vertical sliding block 13. A U-shaped support seat 14 is fixed to the end of the vertical sliding block 13 away from the third drive motor 15. A longitudinal rotating roller 16 is rotatably connected inside the U-shaped support seat 14. The output end of the third drive motor 15 is connected to the longitudinal rotating roller 16 via a track. The longitudinal rotating roller 16 is close to one end of the U-shaped frame 17 and is fixedly connected to the U-shaped frame 17. A vertical slide rail 12 is fixed at one end of the L-shaped sliding seat 9 near the vertical sliding block 13. The vertical sliding block 13 is slidably connected to the vertical slide rail 12. By setting the vertical slide rail 12, the vertical sliding block 13 can slide vertically at one end of the L-shaped sliding seat 9, thereby allowing the position and height of the U-shaped clamping column 4 to be adjusted so as to facilitate the flipping of the U-shaped frame 17. One end of the equipment base 1 is bolted with a first drive motor 5. The output end of the first drive motor 5 is fixed with a first transverse threaded rod 6. A rectangular slider 8 is threadedly connected to the outer side of the first transverse threaded rod 6. Transverse light rods 7 are fixed on both sides inside the equipment base 1. The transverse light rods 7 pass through the interior of the rectangular slider 8 and are slidably connected to the rectangular slider 8. The top of the rectangular slider 8 is fixedly connected to the L-shaped sliding seat 9. The operation of the first drive motor 5 enables the first transverse threaded rod 6 to rotate, thereby enabling the rectangular slider 8 to move laterally on the outer side of the transverse light rod 7. The movement of the rectangular slider 8 enables the L-shaped sliding seat 9 to move laterally, so that the two U-shaped clamping columns 4 can move the circuit board to the bottom of the U-shaped equipment frame 2. Here, the operation of the first drive motor 5 enables the first transverse threaded rod 6 to rotate. The rotation of the first transverse threaded rod 6 enables the rectangular slider 8 to slide laterally on the outside of the transverse light rod 7, thereby enabling the L-shaped sliding seat 9 to move laterally. The movement of the two U-shaped clamping columns 4 enables the circuit board to move out of the bottom of the U-shaped equipment frame 2. Through the operation of the second drive motor 10, the vertical threaded rod 11 is enabled to rotate, thereby enabling the vertical sliding block 13 to move vertically up and down on the outside of the vertical slide rail 12, so that the position and height of the circuit board can be adjusted. When the U-shaped frame 17 rises to a certain height, the operation of the third drive motor 15 causes the longitudinal rotating roller 16 to rotate, which in turn drives the U-shaped frame 17 to rotate, allowing the circuit board to be flipped over so that blind holes on both sides of the circuit board can be detected.

[0020] Working principle: The operation of the fourth drive motor 18 enables the second transverse threaded rod 19 and the third transverse threaded rod 20 to rotate. The rotation of the second transverse threaded rod 19 and the third transverse threaded rod 20, through the setting of the transverse block, enables the U-shaped clamping column 4 to move inside the U-shaped frame 17, thereby making the two U-shaped clamping columns 4 move in opposite directions, thus enabling the two U-shaped clamping columns 4 to clamp the circuit board, thereby enabling this device to adapt to circuit boards of different sizes. The operation of the first drive motor 5 enables the first transverse threaded rod 6 to rotate. The rotation of the first transverse threaded rod 6 enables the rectangular slider 8 to slide laterally on the outside of the transverse light rod 7, thereby enabling the L-shaped sliding seat 9 to move laterally. The movement of the two U-shaped clamping columns 4 enables the circuit board to move out of the bottom of the U-shaped equipment frame 2. The operation of the second drive motor 10 enables the vertical threaded rod 11 to rotate, thereby enabling the vertical sliding block 13 to move vertically up and down on the outside of the vertical slide rail 12, so that the position and height of the circuit board can be adjusted. When the U-shaped frame 17 rises to a certain height, the operation of the third drive motor 15 causes the longitudinal rotating roller 16 to rotate, which in turn drives the U-shaped frame 17 to rotate, allowing the circuit board to be flipped over so that blind holes on both sides of the circuit board can be detected.

[0021] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A device for inspecting blind vias on multilayer printed circuit boards, characterized in that: The device includes a base (1), a U-shaped device frame (2) is fixed on the top of the base (1), an industrial camera (3) is provided at the bottom inside the U-shaped device frame (2), a clamping mechanism for holding the circuit board is provided on the top of the base (1), and a flipping mechanism for flipping the clamping mechanism is also provided on the top of the base (1).

2. The device for inspecting blind vias on multilayer printed circuit boards according to claim 1, characterized in that: The clamping mechanism includes a U-shaped frame (17), one end of which is bolted to a fourth drive motor (18). The output end of the fourth drive motor (18) is fixed to a second transverse threaded rod (19). The end of the second transverse threaded rod (19) away from the fourth drive motor (18) is fixed to a third transverse threaded rod (20). The outer sides of the second transverse threaded rod (19) and the third transverse threaded rod (20) are threaded to U-shaped clamping posts (4). The threads of the second transverse threaded rod (19) and the third transverse threaded rod (20) are opposite in direction.

3. The device for inspecting blind vias on multilayer printed circuit boards according to claim 2, characterized in that: The connection between the second transverse threaded rod (19) and the third transverse threaded rod (20) is rotatably connected to a partition plate via a bearing. The partition plate is close to one end of the U-shaped frame (17) and is fixedly connected to the U-shaped frame (17).

4. The device for inspecting blind vias on multilayer printed circuit boards according to claim 2, characterized in that: The U-shaped frame (17) has a horizontal block fixed inside, and the U-shaped clamping column (4) has a horizontal sliding groove inside. The U-shaped clamping column (4) and the U-shaped frame (17) are slidably connected by the cooperation of the horizontal block and the horizontal sliding groove.

5. The device for inspecting blind vias on multilayer printed circuit boards according to claim 2, characterized in that: The flipping mechanism includes an L-shaped sliding seat (9), with a vertical threaded rod (11) bolted to the top of the L-shaped sliding seat (9). A vertical sliding block (13) is threaded to the outer side of the vertical threaded rod (11). A third drive motor (15) is bolted to one end of the vertical sliding block (13). A U-shaped support seat (14) is fixed to the end of the vertical sliding block (13) away from the third drive motor (15). A longitudinal rotating roller (16) is rotatably connected inside the U-shaped support seat (14). The output end of the third drive motor (15) is connected to the longitudinal rotating roller (16) via a track. The longitudinal rotating roller (16) is close to one end of the U-shaped frame (17) and is fixedly connected to the U-shaped frame (17).

6. The device for inspecting blind vias on multilayer printed circuit boards according to claim 5, characterized in that: The L-shaped sliding seat (9) is fixed with a vertical slide rail (12) at one end near the vertical sliding block (13), and the vertical sliding block (13) is slidably connected to the vertical slide rail (12).

7. The device for inspecting blind vias on multilayer printed circuit boards according to claim 5, characterized in that: One end of the equipment base (1) is bolted with a first drive motor (5), and the output end of the first drive motor (5) is fixed with a first transverse threaded rod (6). The outer side of the first transverse threaded rod (6) is threaded with a rectangular slider (8). Both sides inside the equipment base (1) are fixed with transverse light rods (7). The transverse light rods (7) penetrate the interior of the rectangular slider (8) and are slidably connected to the rectangular slider (8). The top of the rectangular slider (8) is fixedly connected to an L-shaped sliding seat (9).

Images