Large PCBA detection tool

Abstract

The utility model belongs to the technical field of circuit board detection, and discloses a large PCBA detection tool which comprises a conveying mechanism, a detection box is arranged on the conveying mechanism, and a detection mechanism is installed in the detection box. A fixing plate is arranged on the conveying mechanism, a flexible circuit board is fixed to the fixing plate in a magnetic attraction mode, a magnetic material is arranged in the flexible circuit board, and the flexible circuit board is fixed through the fixing plate and then conveyed to the detection mechanism through the conveying mechanism to be detected; the fixing plate is provided with a fixing area matched with the flexible circuit board. According to the scheme, non-contact uniform adsorption is realized through cooperation of the magnetic attraction block and the magnetic material of the flexible circuit board, high stability, warping prevention and uniform stress of the flexible circuit board are realized, and the detection precision is ensured. And the device has the characteristics of quick installation and disassembly, strong adaptability and the like, so that the device has a wide application prospect in the field of flexible circuit board detection.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and more specifically, to a large PCBA testing fixture. Background Technology

[0002] PCBA (Printed Circuit Board Assembly) refers to the process and result of soldering electronic components (such as resistors, capacitors, integrated circuits, etc.) onto a printed circuit board (PCB) to form a complete circuit module. PCBA is a key step in electronic product manufacturing, directly determining the function and performance of electronic devices.

[0003] Large flexible printed circuit boards (FPCBA) are gradually becoming an indispensable component of modern electronic products due to their advantages such as being lightweight, flexible, and having high-density wiring. In certain high electromagnetic interference (EMI) environments, the electromagnetic shielding effect can be enhanced by embedding magnetic materials within the flexible circuit board.

[0004] However, large flexible circuit boards face many challenges in manufacturing and testing, especially in assembly and testing. Ensuring high precision, high stability and high efficiency has become a focus of industry attention.

[0005] Traditional testing fixtures for large flexible circuit boards mostly use mechanical fixing methods. While this method can ensure the stability of the circuit board to a certain extent, it often has the following problems in actual operation:

[0006] 1. Insufficient stability: Mechanical fixing methods are prone to loosening or deformation during long-term use, which can cause the circuit board to warp and affect the test results.

[0007] 2. Complex operation: Mechanical fixing methods require complex operating procedures, which increases the time and difficulty of manual intervention.

[0008] Based on the above problems, this solution proposes a testing method for large flexible circuit boards with built-in magnetic materials to ensure testing accuracy. Utility Model Content

[0009] The purpose of this invention is to address the shortcomings of existing technologies by proposing a large-scale PCBA testing fixture.

[0010] To solve the above problems, the present invention adopts the following technical solution:

[0011] A large PCBA testing fixture includes a conveying mechanism, a testing box is mounted on the conveying mechanism, and a testing mechanism is installed inside the testing box;

[0012] The conveying mechanism is equipped with a fixing plate, on which a flexible circuit board is magnetically fixed. The flexible circuit board contains magnetic material. The flexible circuit board is fixed by the fixing plate and then conveyed by the conveying mechanism to the testing mechanism for testing.

[0013] The fixing plate is provided with a fixing area adapted to the flexible circuit board. Several arrayed first magnetic blocks and second magnetic blocks are embedded and installed in the fixing area and on the fixing plate. The flexible circuit board is fixed to the fixing plate by the first magnetic blocks and the second magnetic blocks.

[0014] An auxiliary assembly mechanism for flexible circuit boards is provided on one side of the conveying mechanism.

[0015] As a further description of the above technical solution: the conveying mechanism includes a frame, the detection box is installed on the frame, and conveyor belts are provided on both sides of the inside of the frame. The conveyor belts are driven by a transmission mechanism. The distance between the two conveyor belts is adapted to the fixed plate, and the fixed plate is mounted on the two conveyor belts.

[0016] As a further description of the above technical solution: the auxiliary assembly mechanism includes an assembly table, which is fixedly installed on the outside of the frame. An assembly plate is provided on the assembly table, and a first positioning post is provided on each of the two side corners of the assembly plate. A first positioning hole is provided on the fixed plate corresponding to the first positioning post. The fixed plate is assembled on the assembly table through the first positioning post and the first positioning hole.

[0017] As a further description of the above technical solution: multiple second positioning posts are fixedly connected to the edge of the corresponding fixed area on the assembly plate, and second positioning holes are opened on the fixed plate and the flexible circuit board corresponding to the second positioning posts. The flexible circuit board is assembled on the fixed plate through the second positioning posts and the second positioning holes.

[0018] As a further description of the above technical solution: the assembly plate has a built-in counterweight, and notches are provided on both sides of the assembly plate.

[0019] As a further description of the above technical solution: an industrial control computer is also provided on the outside of the conveying mechanism, and the industrial control computer is electrically connected to the detection mechanism and the transmission mechanism.

[0020] As a further description of the above technical solution: the first magnetic block is provided in two sets and corresponds to both sides of the flexible circuit board, and the second magnetic block is one set, located between the two sets of the first magnetic blocks.

[0021] Compared with existing technologies, the advantages of this utility model are:

[0022] I. This solution achieves non-contact, uniform adsorption by combining magnetic blocks with the magnetic material of the flexible circuit board. This results in high stability of the flexible circuit board, prevention of warping, and uniform force distribution, ensuring testing accuracy. Furthermore, its rapid installation and disassembly, along with its strong adaptability, makes it a promising candidate for widespread application in the field of flexible circuit board testing.

[0023] Second, the design of the auxiliary assembly mechanism in this solution not only improves the accuracy and efficiency of assembly, but also enhances the stability and ease of operation of assembly, while reducing production costs and improving product quality.

[0024] Third, the coordination between the conveying mechanism and the industrial control computer in this solution enables fully automated operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the fixing plate of this utility model;

[0027] Figure 3 This is a schematic diagram of the assembly plate of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the flexible circuit board of this utility model.

[0029] Explanation of the labels in the diagram:

[0030] 1. Conveying mechanism; 11. Frame; 12. Conveyor belt;

[0031] 2. Testing box;

[0032] 3. Testing institutions;

[0033] 4. Fixing plate; 41. Fixing area; 42. First magnetic block; 43. Second magnetic block;

[0034] 5. Flexible circuit board;

[0035] 6. Auxiliary assembly mechanism; 61. Assembly table; 62. Assembly plate; 621. Notch; 63. First positioning post; 64. First positioning hole; 65. Second positioning post; 66. Second positioning hole; 7. Industrial control computer. Detailed Implementation

[0036] 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.

[0037] Example 1

[0038] Please see Figure 1-4 A large PCBA testing fixture includes a conveying mechanism 1, a testing box 2 mounted on the conveying mechanism 1, and a testing mechanism 3 (such as a probe module, optical testing unit, etc.) installed inside the testing box 2 for electrical or optical testing. A fixing plate 4 is mounted on the conveying mechanism 1, and a flexible circuit board 5 is magnetically fixed to the fixing plate 4. The flexible circuit board 5 contains magnetic material. After being fixed by the fixing plate 4, the flexible circuit board 5 is conveyed by the conveying mechanism 1 to the testing mechanism 3 for testing. The magnetic fixing of the flexible circuit board 5 is simple and quick, and ensures that it remains flat during transport, which is beneficial for subsequent testing.

[0039] The conveying mechanism 1 includes a frame 11, with the detection box 2 mounted on the frame 11. Conveyor belts 12 are located on both sides of the frame 11, and the conveyor belts 12 are driven by a transmission mechanism. The distance between the two conveyor belts 12 is adapted to the fixed plate 4, which is mounted on the two conveyor belts 12. In this embodiment, the conveying mechanism 1 ensures stable transport of the fixed plate 4 and its flexible circuit board 5, and also facilitates the placement and removal of the fixed plate 4.

[0040] In addition, an industrial control computer 7 is installed on the outside of the conveying mechanism 1. The industrial control computer 7 is electrically connected to the detection mechanism 3 and the transmission mechanism to control the detection process and conveying rhythm, so as to realize fully automated operation.

[0041] Example 2

[0042] Please see Figure 2 This embodiment is a further improvement based on embodiment 1. Compared with embodiment 1, the fixing plate 4 is provided with a fixing area 41 adapted to the flexible circuit board. Several arrayed first magnetic blocks 42 and second magnetic blocks 43 are embedded and installed in the fixing area 41 and on the fixing plate 4. The flexible circuit board is fixed on the fixing plate 4 by the first magnetic blocks 42 and the second magnetic blocks 43.

[0043] In this embodiment, the installation and removal of the flexible circuit board 5 are made faster and more convenient by using the first magnetic block 42 and the second magnetic block 43 for fixation, thus improving operational efficiency. During testing, the flexible circuit board remains highly stable, avoiding testing errors caused by vibration or displacement. Furthermore, the arrayed magnetic blocks ensure that the flexible circuit board 5 is uniformly stressed within the fixing area 41, preventing localized stress concentration.

[0044] Furthermore, two sets of first magnetic blocks 42 are provided and correspond to both sides of the flexible circuit board 5. A second set of magnetic blocks 43 is located between the two sets of first magnetic blocks 42, covering the edges and critical stress areas of the flexible circuit board 5 to prevent warping. It should be noted that the arrangement of the fixing area 41 and the magnetic blocks can be adjusted according to flexible circuit boards 5 of different sizes and shapes to adapt to various testing requirements.

[0045] Example 3

[0046] Please see Figure 1 , 3 This embodiment is a further improvement based on Embodiment 1 or Embodiment 2. Compared with Embodiment 1 or Embodiment 2, an auxiliary assembly mechanism 6 for the flexible circuit board 5 is provided on one side of the conveying mechanism 1. The auxiliary assembly mechanism 6 includes an assembly table 61, which is fixedly installed on the outside of the frame 11. An assembly plate 62 is provided on the assembly table 61. First positioning posts 63 are provided on both sides of the assembly plate 62. First positioning holes 64 are opened on the fixing plate 4 corresponding to the first positioning posts 63. The fixing plate 4 is assembled on the assembly table 61 through the first positioning posts 63 and the first positioning holes 64. Multiple second positioning posts 65 are fixedly connected to the edge of the assembly plate 62 corresponding to the fixing area 41. Second positioning holes 66 are opened on the fixing plate 4 and the flexible circuit board 5 corresponding to the second positioning posts 65. The flexible circuit board 5 is assembled on the fixing plate 4 through the second positioning posts 65 and the second positioning holes 66.

[0047] When assembling the flexible circuit board 5, the fixing plate 4 is first assembled onto the assembly plate 62 using the first positioning post 63 and the first positioning hole 64, ensuring that the fixing plate 4 can be accurately assembled onto the assembly plate 62. After the fixing plate 4 is assembled, the second positioning post 65 is precisely inserted into the second positioning hole 66 of the fixing plate 4.

[0048] Next, the second positioning holes 66 on the flexible circuit board 5 are fitted onto the second positioning posts 65 to position the flexible circuit board 5, preventing it from shifting or misaligning and ensuring assembly accuracy. Under the action of the magnetic blocks and the magnetic material built into the flexible circuit board 5, the flexible circuit board 5 is attracted and fixed to the fixing plate 4, enhancing assembly stability and preventing loosening or detachment during transport. Finally, the fixing plate 4 is removed from the assembly plate 62 and placed on the conveyor belt 12 for transport. The entire assembly, transport, and inspection process is highly efficient. The high-precision positioning and fixing of the auxiliary assembly mechanism 6 ensures accurate assembly of the flexible circuit board 5 and the fixing plate 4, improving the overall quality of the product.

[0049] In addition, the assembly plate 62 has a built-in counterweight. The size of the assembly plate 62 is the same as that of the fixing plate 4. The assembly plate 62 has notches 621 on both sides to facilitate manual handling of the fixing plate 4.

[0050] 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 large PCBA detection tool, characterized in that: It includes a conveying mechanism (1), on which a detection box (2) is provided, and a detection mechanism (3) is installed inside the detection box (2); The conveying mechanism (1) is provided with a fixing plate (4), and a flexible circuit board (5) is magnetically fixed on the fixing plate (4). The flexible circuit board (5) contains magnetic material. The flexible circuit board (5) is fixed by the fixing plate (4) and then conveyed by the conveying mechanism (1) to the testing mechanism (3) for testing. The fixing plate (4) is provided with a fixing area (41) adapted to the flexible circuit board. A plurality of first magnetic blocks (42) and second magnetic blocks (43) arranged in an array are embedded in the fixing area (41) and located on the fixing plate (4). The flexible circuit board is fixed on the fixing plate (4) by the first magnetic blocks (42) and the second magnetic blocks (43). An auxiliary assembly mechanism (6) for the flexible circuit board (5) is provided on one side of the conveying mechanism (1).

2. The large PCBA testing fixture according to claim 1, characterized in that: The conveying mechanism (1) includes a frame (11), the detection box (2) is installed on the frame (11), and the frame (11) has conveyor belts (12) on both sides inside. The conveyor belts (12) are driven by a transmission mechanism. The distance between the two conveyor belts (12) is adapted to the fixed plate (4). The fixed plate (4) is mounted on the two conveyor belts (12).

3. The large PCBA testing fixture according to claim 2, characterized in that: The auxiliary assembly mechanism (6) includes an assembly table (61), which is fixedly installed on the outside of the frame (11). An assembly plate (62) is provided on the assembly table (61). A first positioning post (63) is provided on both sides of the assembly plate (62). A first positioning hole (64) is provided on the fixing plate (4) corresponding to the first positioning post (63). The fixing plate (4) is assembled on the assembly table (61) through the first positioning post (63) and the first positioning hole (64).

4. The large PCBA testing fixture according to claim 3, characterized in that: Multiple second positioning posts (65) are fixedly connected to the edge of the mounting plate (62) corresponding to the fixed area (41). The fixed plate (4) and the flexible circuit board (5) are provided with second positioning holes (66) corresponding to the second positioning posts (65). The flexible circuit board (5) is assembled on the fixed plate (4) through the second positioning posts (65) and the second positioning holes (66).

5. A large PCBA testing fixture according to claim 3, characterized in that: The assembly plate (62) has a built-in counterweight, and notches (621) are provided on both sides of the assembly plate (62).

6. A large PCBA testing fixture according to claim 2, characterized in that: An industrial control computer (7) is also provided on the outside of the conveying mechanism (1), and the industrial control computer (7) is electrically connected to the detection mechanism (3) and the transmission mechanism.

7. A large PCBA testing fixture according to claim 1, characterized in that: The first magnetic block (42) is provided in two sets and corresponds to both sides of the flexible circuit board (5). The second magnetic block (43) is one set and is located between the two sets of the first magnetic blocks (42).

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