Defect detection tool for printed circuit board

Abstract

The utility model discloses a defect detection tool for a printed circuit board, which comprises a tool body, a threaded rod, a lubricating rod and a lifting platform, one side of the surface of the tool body is connected with a connecting frame, the threaded rod is connected inside the connecting frame, the top of the threaded rod is provided with a first rotation driving mechanism, and the top of the first rotation driving mechanism is provided with a second rotation driving mechanism. The threaded rod is sleeved with a lifting sleeve, the other side of the surface of the tool body is connected with a lubricating rod, and the lubricating rod is sleeved with a lifting sliding sleeve. According to the utility model, the rotating handle, the second transmission rod, the driven gear, the driving gear and the second two-way screw rod are matched for use, so that the distance between the two clamping plates can be manually regulated and controlled, printed circuit boards with different thickness specifications can be conveniently clamped and fixed, the positioning reliability is improved, and the working efficiency is improved. The problem that the quality of the circuit board is affected by missed detection of bad defects of the printed circuit board due to offset of the circuit board caused by insufficient clamping stability is avoided.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board inspection technology, specifically to a defect inspection tooling for printed circuit boards. Background Technology

[0002] Printed circuit boards (PCBs) are crucial electronic components, serving as the support structure for electronic devices and providing electrical connections. With the rapid development of the electronics industry, PCBs are evolving towards multi-layered and high-density designs, placing increasingly higher demands on automated optical inspection equipment used for PCB testing. Automated optical inspection equipment primarily utilizes high-speed, high-precision vision processing technology to automatically detect various mounting errors and soldering defects on PCBs.

[0003] The positioning accuracy of the printed circuit board will affect its detection accuracy. Currently, a 90-degree "L" angle positioning fixture is mainly used, which is fixed to the machine with double-sided tape. This positioning method is prone to displacement during use, which can cause the printed circuit board to be inspected to be misaligned, resulting in the failure to detect defects in the printed circuit board and affecting the quality of the printed circuit board.

[0004] Secondly, the existing fixtures used for positioning printed circuit boards are not flexible enough and have a limited range of adjustment, resulting in low practicality and requiring urgent development. Utility Model Content

[0005] The purpose of this invention is to provide a defect detection fixture for printed circuit boards to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a defect detection fixture for printed circuit boards, comprising a fixture body, a threaded rod, a lubricating rod, and a lifting platform. A connecting frame is connected to one side of the surface of the fixture body, and a threaded rod is connected inside the connecting frame. A first rotary drive mechanism is installed on the top of the threaded rod, and a lifting sleeve is fitted around the threaded rod. A lubricating rod is connected to the other side of the surface of the fixture body, and a lifting sliding sleeve is fitted around the lubricating rod. The lifting sliding sleeve and the lifting frame are connected through a lifting platform. A first bidirectional screw is connected inside the lifting platform, and a second rotary drive mechanism is installed at the end of the first bidirectional screw. A first movable frame and a second movable frame are symmetrically fitted around the first bidirectional screw.

[0007] Preferably, the bottom of the lifting platform is connected to a first limiting slide groove, and the bottom of the first movable frame and the second movable frame are connected to a first limiting slider, and the first limiting slider is slidably connected to the first limiting slide groove.

[0008] Preferably, a third rotary drive mechanism is installed inside the top of the first movable frame, and a bearing seat is connected inside one side of the top of the second movable frame.

[0009] Preferably, the output ends of the third rotary drive mechanism and the bearing housing are simultaneously connected to a rotating frame via a first transmission rod.

[0010] Preferably, the rotating frame is internally connected to a second bidirectional screw, and two clamping plates are symmetrically sleeved on the outside of the second bidirectional screw.

[0011] Preferably, a support rod is connected to one side of the top of the rotating frame, and a second transmission rod is connected inside the driven gear. One end of the second transmission rod is connected to the support rod, and the other end of the second transmission rod is connected to a handle.

[0012] Preferably, the inner surface of the rotating frame is connected to a second limiting groove, and the end of the clamping plate is connected to a second limiting slider, wherein the second limiting slider is slidably connected to the second limiting groove.

[0013] Preferably, the top of the second bidirectional screw is connected to a drive gear, the drive gear is located on the top of the rotating frame, and the top of the drive gear is meshed with a driven gear.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) This type of defect detection fixture for printed circuit boards, through the cooperation of a rotating handle, a second transmission rod, a driven gear, a driving gear, and a second bidirectional screw, enables manual adjustment of the distance between two clamping plates, which facilitates clamping and fixing of printed circuit boards of different thicknesses, improves the reliability of positioning, and avoids the loss of detection of defects in the printed circuit board due to insufficient clamping stability.

[0016] (2) This type of defect detection fixture for printed circuit boards can adjust the height of the lifting platform by using the threaded rod, the first rotary drive mechanism, the lifting sleeve, the lubricating rod and the lifting slide sleeve in combination. By using the first bidirectional screw, the second rotary drive mechanism and the first moving frame in combination, the distance between the first moving frame and the second moving frame can be adjusted according to the length specification of the circuit board, which effectively improves the adjustability of the fixture.

[0017] (3) This type of defect detection fixture for printed circuit boards can rotate and flip the circuit board in a clamped and fixed state by using the third rotary drive mechanism, the first transmission rod and the bearing seat together, thereby improving the range of subsequent detection and the efficiency of detection work. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the connection structure between the first movable frame and the rotating frame of this utility model;

[0020] Figure 3 This is a top view of the connection between the first movable frame, the rotating frame, and the clamping plate of this utility model.

[0021] Figure 4 This is a side view of the connection between the rotating frame and the clamping plate of this utility model;

[0022] Figure 5 This is a top view of the connection between the lifting platform and the second movable frame of this utility model.

[0023] In the diagram: 1. Tooling body; 2. Connecting frame; 3. Threaded rod; 4. First rotary drive mechanism; 5. Lifting sleeve; 6. Lubricating rod; 7. Lifting sliding sleeve; 8. Lifting platform; 801. First limiting slide groove; 9. First bidirectional screw; 10. Second rotary drive mechanism; 11. First moving frame; 12. Second moving frame; 13. First limiting slider; 14. Third rotary drive mechanism; 15. Bearing seat; 16. First transmission rod; 17. Rotary frame; 1701. Second limiting slide groove; 18. Second bidirectional screw; 19. Clamping plate; 20. Second limiting slider; 21. Driving gear; 22. Driven gear; 23. Second transmission rod; 24. Support rod; 25. Rotary handle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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 scope of protection of the present utility model.

[0025] Please see Figure 1-5 The present invention provides an embodiment of a defect detection fixture for printed circuit boards, comprising a fixture body 1, a threaded rod 3, a lubricating rod 6, and a lifting platform 8. A connecting frame 2 is connected to one side of the surface of the fixture body 1, and the threaded rod 3 is connected inside the connecting frame 2. A first rotary drive mechanism 4 is installed on the top of the threaded rod 3, and a lifting sleeve 5 is sleeved on the outside of the threaded rod 3. A lubricating rod 6 is connected to the other side of the surface of the fixture body 1, and a lifting sliding sleeve 7 is sleeved on the outside of the lubricating rod 6. The threaded rod 3, the first rotary drive mechanism 4, the lifting sleeve 5, the lubricating rod 6, and the lifting sliding sleeve 7 work together to adjust the working height of the lifting platform 8.

[0026] The lifting sleeve 7 and the lifting sleeve 5 are connected by a lifting platform 8. The lifting platform 8 is internally connected to a first bidirectional screw 9. A second rotary drive mechanism 10 is installed at the end of the first bidirectional screw 9. A first movable frame 11 and a second movable frame 12 are symmetrically mounted on the outside of the first bidirectional screw 9. Through the cooperation of the first bidirectional screw 9, the second rotary drive mechanism 10 and the first movable frame 11, the spacing between the first movable frame 11 and the second movable frame 12 can be adjusted according to the length specifications of the circuit board.

[0027] The bottom of the lifting platform 8 is connected to a first limiting slide groove 801, and the bottom of the first moving frame 11 and the second moving frame 12 are connected to a first limiting slider 13. The first limiting slider 13 is slidably connected to the first limiting slide groove 801.

[0028] A third rotary drive mechanism 14 is installed inside the top of the first movable frame 11. A bearing seat 15 is connected inside one side of the top of the second movable frame 12. The output ends of the third rotary drive mechanism 14 and the bearing seat 15 are connected to the rotating frame 17 through the first transmission rod 16. The cooperation of the third rotary drive mechanism 14, the first transmission rod 16 and the bearing seat 15 can rotate and flip the circuit board in the clamped and fixed state as a whole.

[0029] The rotating frame 17 is internally connected to a second bidirectional screw 18, and two clamping plates 19 are symmetrically sleeved on the outside of the second bidirectional screw 18.

[0030] A support rod 24 is connected to one side of the top of the rotating frame 17. A second transmission rod 23 is connected inside the driven gear 22. One end of the second transmission rod 23 is connected to the support rod 24, and the other end of the second transmission rod 23 is connected to a handle 25. The cooperation of the handle 25, the second transmission rod 23, the driven gear 22, the driving gear 21, and the second bidirectional screw 18 enables manual adjustment of the distance between the two clamping plates 19, which is convenient for clamping and fixing printed circuit boards of different thicknesses.

[0031] The inner surface of the rotating frame 17 is connected to a second limiting slide groove 1701, and the end of the clamping plate 19 is connected to a second limiting slider 20. The second limiting slider 20 is slidably connected to the second limiting slide groove 1701.

[0032] The top of the second bidirectional screw 18 is connected to a drive gear 21, which is located on the top of the rotating frame 17. The top of the drive gear 21 is meshed with a driven gear 22.

[0033] In this embodiment, the cooperation of the handle 25, the second transmission rod 23, the driven gear 22, the driving gear 21, and the second bidirectional screw 18 allows for manual adjustment of the distance between the two clamping plates 19, facilitating the clamping and fixing of printed circuit boards of different thicknesses. The cooperation of the threaded rod 3, the first rotary drive mechanism 4, the lifting sleeve 5, the lubricating rod 6, and the lifting sliding sleeve 7 allows for adjustment of the working height of the lifting platform 8. The cooperation of the first bidirectional screw 9, the second rotary drive mechanism 10, and the first moving frame 11 allows for adjustment of the working distance between the first moving frame 11 and the second moving frame 12 according to the length of the circuit board. The cooperation of the third rotary drive mechanism 14, the first transmission rod 16, and the bearing seat 15 allows for the overall rotation and flipping of the clamped circuit board.

Claims

1. A defect detection fixture for printed circuit boards, characterized in that, The fixture includes a tooling body (1), a threaded rod (3), a lubricating rod (6), and a lifting platform (8). A connecting frame (2) is connected to one side of the surface of the tooling body (1). The threaded rod (3) is connected inside the connecting frame (2). A first rotary drive mechanism (4) is installed on the top of the threaded rod (3). A lifting sleeve (5) is sleeved on the outside of the threaded rod (3). A lubricating rod (6) is connected to the other side of the surface of the tooling body (1). A lifting slide sleeve (7) is sleeved on the outside of the lubricating rod (6). The lifting slide sleeve (7) and the lifting sleeve (5) are connected through the lifting platform (8). A first bidirectional screw (9) is connected inside the lifting platform (8). A second rotary drive mechanism (10) is installed at the end of the first bidirectional screw (9). A first moving frame (11) and a second moving frame (12) are symmetrically sleeved on the outside of the first bidirectional screw (9).

2. The defect detection fixture for printed circuit boards according to claim 1, characterized in that: The bottom of the lifting platform (8) is connected to a first limiting slide groove (801), and the bottom of the first moving frame (11) and the second moving frame (12) are connected to a first limiting slider (13). The first limiting slider (13) is slidably connected to the first limiting slide groove (801).

3. The defect detection fixture for printed circuit boards according to claim 1, characterized in that: A third rotary drive mechanism (14) is installed inside the top of the first movable frame (11), and a bearing seat (15) is connected inside one side of the top of the second movable frame (12).

4. The defect detection fixture for printed circuit boards according to claim 3, characterized in that: The output ends of the third rotary drive mechanism (14) and the bearing seat (15) are simultaneously connected to the rotating frame (17) via the first transmission rod (16).

5. A defect detection fixture for printed circuit boards according to claim 4, characterized in that: The rotating frame (17) is internally connected to a second bidirectional screw (18), and two clamping plates (19) are symmetrically sleeved on the outside of the second bidirectional screw (18).

6. A defect detection fixture for printed circuit boards according to claim 5, characterized in that: The inner surface of the rotating frame (17) is connected to a second limiting slide groove (1701), and the end of the clamping plate (19) is connected to a second limiting slider (20). The second limiting slider (20) is slidably connected to the second limiting slide groove (1701).

7. A defect detection fixture for printed circuit boards according to claim 5, characterized in that: The top of the second bidirectional screw (18) is connected to a drive gear (21), which is located on the top of the rotating frame (17), and the top of the drive gear (21) is meshed with a driven gear (22).

8. A defect detection fixture for printed circuit boards according to claim 7, characterized in that: A support rod (24) is connected to one side of the top of the rotating frame (17), and a second transmission rod (23) is connected inside the driven gear (22). One end of the second transmission rod (23) is connected to the support rod (24), and the other end of the second transmission rod (23) is connected to a handle (25).

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