A printed circuit board detection fixture

Abstract

The utility model discloses a kind of printed circuit board detection fixtures, it is related to circuit board detection technical field, to solve the problem of current detection method by artificial detection, it is easily influenced by personnel experience, fatigue and emotional state when detecting, difficult to form unified, objective standard, its technical scheme main point is: including bottom plate, bottom plate is equipped with groove one, several sliding blocks one are slidably connected on groove one, fixed block is fixedly connected on sliding block one, threaded rod is threadedly connected on fixed block, test piece for testing circuit board aperture is equipped on sliding block one.The utility model discloses a kind of printed circuit board detection fixtures, can be tested by test piece auxiliary artificial circuit board aperture detection, to reduce artificial subjective influence, and can make detection efficiency accelerate.

Description

Technical Field

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

[0002] In the manufacturing process of printed circuit boards, it is crucial to ensure that every circuit board leaving the factory meets the design specifications and quality standards. After the circuit board is produced, its key physical parameters such as appearance, thickness and hole diameter directly affect the subsequent surface mounting, component insertion and the assembly reliability and long-term stability of the whole machine. Therefore, physical performance testing of the circuit board at the end of the production process is an indispensable step.

[0003] Existing testing methods mainly rely on manual testing, which is easily affected by the experience, fatigue, and emotional state of the personnel, making it difficult to establish a unified and objective standard.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a printed circuit board inspection fixture, which can assist manual inspection of circuit board hole diameter by using test pieces, thereby reducing the influence of human subjectivity and improving inspection efficiency.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a printed circuit board testing fixture includes a base plate, a sliding groove is provided on the base plate, a plurality of sliders are slidably connected to the sliding groove, a fixing block is fixedly connected to the slider, a threaded rod is threadedly connected to the fixing block, and a test piece for testing the hole diameter of the circuit board is provided on the slider.

[0007] The present invention is further configured such that: the test piece includes a limiting rod fixedly connected to the slider, several sliding rings slidably connected to the limiting rod, a test column fixedly connected to the sliding rings, and a bolt threadedly connected to the test column.

[0008] The present invention is further configured such that: several test columns have different diameters, and a conical block is fixedly connected to the upper side of each test column, the inner diameter of the conical block is the same, and the outer diameter of the conical block is the same as the outer diameter of the adjacent test column.

[0009] The present invention is further configured such that: a second sliding groove is provided on the base plate, a plurality of second sliding blocks are fixedly connected in the second sliding groove, a positioning block is slidably connected on the second sliding block, and a spring is fixedly connected between the positioning block and the adjacent second sliding block.

[0010] The present invention is further configured such that: the base plate is provided with several limiting grooves I for inserting several sliding rings, test columns and conical blocks; the base plate is provided with several limiting grooves II for inserting several sliders I, fixing blocks, threaded rods and limiting rods; and the base plate is provided with several limiting grooves III for inserting several sliders II and positioning blocks.

[0011] The present invention is further configured such that a protective cover is rotatably connected to the base plate.

[0012] In summary, this utility model has the following beneficial effects: it can assist manual inspection of circuit board hole diameter by using test pieces, thereby reducing the influence of human subjectivity and improving inspection efficiency. It can also store the test parts through limiting groove one, limiting groove two and limiting groove three respectively, preventing the test parts from being lost. After storage, the protective cover can be closed to make the inspection fixture portable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 A partial structural cross-section of this utility model. Figure 1 ; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 Partial cross-sectional view of this utility model Figure 2 .

[0014] In the diagram: 1. Base plate; 2. Slide groove one; 3. Slider one; 4. Fixing block; 5. Threaded rod; 6. Limiting rod; 7. Sliding ring; 8. Test column; 9. Bolt; 10. Conical block; 11. Slide groove two; 12. Slider two; 13. Positioning block; 14. Spring; 15. Limiting groove one; 16. Limiting groove two; 17. Limiting groove three; 18. Protective cover. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] A printed circuit board testing fixture, such as Figures 1-3As shown, it includes a base plate 1, a slide groove 2 on the base plate 1, a plurality of sliders 3 slidably connected to the slide groove 2, a fixing block 4 fixedly connected to the sliders 3, a threaded rod 5 threadedly connected to the fixing block 4, and a test piece for testing the hole diameter of the circuit board on the sliders 3. The test piece includes a limiting rod 6 fixedly connected to the sliders 3, a plurality of sliding rings 7 slidably connected to the limiting rod 6, a test post 8 fixedly connected to the sliding rings 7, and a bolt 9 threadedly connected to the test post 8.

[0017] like Figures 1-3 As shown, before testing the circuit board, first check the number of through holes along the long side of the circuit board. Select several sliders 3 according to the number of through holes, then slide the sliders 3 into the slide grooves 2, and align the limiting rods 6 with the through holes in the same row. Then, according to the number of through holes in the row corresponding to each limiting rod 6, fit the corresponding number of sliding rings 7 onto the limiting rods 6. Then, align the positions of the test posts 8 with the positions of the through holes. Finally, take the circuit board sample and fine-tune the positions of the limiting rods 6 and the test posts 8 so that the through holes on the circuit board sample are evenly fitted. The circuit board is placed on the test post 8. Then, the threaded rod 5 is rotated to make it abut against the base plate 1. The bolt 9 is rotated to make the threaded rod 5 abut against the limit rod 6 to prevent the slider 3 and the sliding ring 7 from moving. Then, the circuit board can be tested. Take the circuit board and align the through hole of the circuit board with the test post 8 and put it on the test post 8. If the through hole of the circuit board can be put on several test posts 8 and there is no obvious gap between the through hole and the test post 8, it is a qualified circuit board. If the through hole of the circuit board cannot be put on several test posts 8 or there is an obvious gap between the through hole and the test post 8, it is considered a defective circuit board.

[0018] like Figures 1-3 As shown, several test posts 8 have different diameters to accommodate more types of circuit boards and improve the practicality of the testing fixture. A conical block 10 is fixedly connected to the upper side of the test post 8. The inner diameter of the conical block 10 is the same, and the outer diameter of the conical block 10 is the same as the outer diameter of the adjacent test post 8. This makes it easier to fit the circuit board onto the test posts 8 without having to align the holes for a long time, thereby improving the testing efficiency.

[0019] like Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, a second groove 11 is provided on the base plate 1. Several second sliders 12 are fixedly connected in the second groove 11. A positioning block 13 is slidably connected to the second slider 12. A spring 14 is fixedly connected between the positioning block 13 and the adjacent second slider 12. After selecting several first sliders 3, an equal number of second sliders 12 can be selected and slid into the second groove 11. The positioning block 13 is then pressed so that it contacts several limiting rods 6 respectively. When the positioning block 13 contacts the limiting rod 6, the positioning block 13 can be pressed again so that it slides on the second slider 12. At this time, the spring 14 will be deformed into a compressed state. Then, the second slider 12 is pushed again and the positioning block 13 is no longer pressed. At this time, the positioning block 13 will be pushed by the spring 14 so that the groove on the positioning block 13 contacts the limiting rod 6, supporting the limiting rod 6. This prevents the limiting rod 6 from being suspended for a long time, which would greatly reduce the life of the limiting rod 6.

[0020] like Figures 1-2 As shown, the base plate 1 has several limiting grooves 15 for inserting several sliding rings 7, test columns 8 and conical blocks 10. The base plate 1 also has several limiting grooves 16 for inserting several sliders 3, fixing blocks 4, threaded rods 5 and limiting rods 6. The base plate 1 further has several limiting grooves 17 for inserting several sliders 2 12 and positioning blocks 13. The limiting grooves 15, 16, and 17 can respectively accommodate the testing components (sliding rings 7, test columns 8, conical blocks 10, sliders 3, fixing blocks 4, threaded rods 5, limiting rods 6, sliders 2 12, and positioning blocks 13) to prevent the testing components from being lost.

[0021] like Figure 1 As shown, the base plate 1 is rotatably connected to a protective cover 18. When the detection component is in the storage state, the protective cover 18 can be rotated, and then the inner top side of the protective cover 18 will come into contact with several detection components, thereby preventing the detection components from falling off the base plate 1 when the detection fixture is carried.

[0022] Working principle: Before testing the circuit board, first check the number of through holes along the long side of the circuit board. Select several sliders 3 according to the number of through holes, then slide sliders 3 into the slide groove 2, and align several limit rods 6 with the through holes in the same row. Then, according to the number of through holes in the row corresponding to each limit rod 6, put the corresponding number of sliding rings 7 on the limit rods 6. Then, align the positions of several test posts 8 with the through hole positions. Next, take the circuit board sample and fine-tune the positions of the limit rods 6 and test posts 8 so that the through holes of the circuit board sample are all fitted onto the test posts 8. Then, rotate the threaded rod 5 to make it abut against the base plate 1, and rotate the bolt 9 to make the threaded rod 5 abut against the limit rod 6. Then, select several sliders 12 of the same number as sliders 3 and slide them into the slide groove 11. Press the positioning blocks 13 so that the positioning blocks 13 are respectively aligned with the limit rods. 6. When the positioning block 13 contacts the limiting rod 6, the positioning block 13 can be pressed again to make it slide on the slider 12. At this time, the spring 14 will be deformed into a compressed state. Then, the slider 12 is pushed again and the positioning block 13 is no longer pressed. At this time, the positioning block 13 will be pushed by the spring 14, so that the groove on the positioning block 13 contacts the limiting rod 6 and supports the limiting rod 6. Then, the circuit board can be tested. Take the circuit board and align the through hole of the circuit board with the test post 8 and put it on the test post 8. If the through hole of the circuit board can be put on several test posts 8 and there is no obvious gap between the through hole and the test post 8, it is a qualified circuit board. If the through hole of the circuit board cannot be put on several test posts 8 or there is an obvious gap between the through hole and the test post 8, it is considered a defective circuit board. In this way, the test fixture can be used to assist manual inspection of the circuit board hole diameter, reduce the subjective influence of human, and speed up the inspection efficiency.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A printed circuit board testing fixture, comprising a base plate (1), characterized in that: The base plate (1) has a sliding groove (2), and a number of sliders (3) are slidably connected to the sliding groove (2). A fixing block (4) is fixedly connected to the slider (3), and a threaded rod (5) is threadedly connected to the fixing block (4). A test piece for testing the hole diameter of the circuit board is provided on the slider (3).

2. The printed circuit board testing fixture according to claim 1, characterized in that: The test piece includes a limiting rod (6) fixedly connected to the slider (3), several sliding rings (7) slidably connected to the limiting rod (6), a test column (8) fixedly connected to the sliding rings (7), and a bolt (9) internally threaded to the test column (8).

3. The printed circuit board testing fixture according to claim 2, characterized in that: Several of the test columns (8) have different diameters. A conical block (10) is fixedly connected to the upper side of the test column (8). The inner diameter of the conical block (10) is the same, and the outer diameter of the conical block (10) is the same as the outer diameter of the adjacent test column (8).

4. A printed circuit board testing fixture according to claim 2, characterized in that: The base plate (1) has a sliding groove (11) and a number of sliders (12) are fixedly connected in the sliding groove (11). A positioning block (13) is slidably connected on the slider (12). A spring (14) is fixedly connected between the positioning block (13) and the adjacent slider (12).

5. A printed circuit board testing fixture according to claim 4, characterized in that: The base plate (1) is provided with several limiting grooves (15) for inserting several sliding rings (7), test columns (8) and conical blocks (10). The base plate (1) is provided with several limiting grooves (16) for inserting several sliders (3), fixing blocks (4), threaded rods (5) and limiting rods (6). The base plate (1) is provided with several limiting grooves (17) for inserting several sliders (12) and positioning blocks (13).

6. A printed circuit board testing fixture according to claim 4, characterized in that: The base plate (1) is rotatably connected to a protective cover (18).

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