Positioning tool for PCB detection

Abstract

The utility model discloses a positioning tool for PCB (Printed Circuit Board) detection. The tool comprises a mounting base and at least two positioning assemblies used for clamping a PCB, and the two positioning assemblies are arranged on the mounting base in a mirror image mode and can move front and back; the positioning assembly comprises a sliding seat and a telescopic rod, the mounting seat is provided with a sliding groove, the sliding seat is movably embedded in the sliding groove, and the telescopic rod is inserted above the sliding seat in a manner of moving up and down; a first extension plate and a second extension plate are further included, the first extension plate and the second extension plate are fixedly arranged at one end of the telescopic rod in a spaced mode, and a first gap used for clamping a PCB is formed between the first extension plate and the second extension plate; the support rods are used for supporting the PCB, and the support rods are distributed on the mounting seat at intervals in a manner of moving up and down; by arranging the mirror image positioning assembly capable of moving back and forth and the first gap with the adjustable height, the PCB can be accurately clamped and fixed.

Description

Technical Field

[0001] This utility model relates to the field of PCB inspection technology, and in particular to a positioning fixture for PCB board inspection. Background Technology

[0002] In the electronics manufacturing industry, PCBs (Printed Circuit Boards) serve as the support and electrical connection carrier for electronic components. During production, they require rigorous quality testing to ensure their performance and reliability meet standards. Probe testing is a commonly used method for PCB inspection. It involves contacting probes with pads or test points on the PCB to measure its electrical properties, such as continuity, resistance, and voltage.

[0003] However, existing PCB board inspection technologies using probes have several drawbacks without specialized positioning fixtures:

[0004] 1. The pads and test points on the PCB are usually small in size and closely arranged. Without positioning fixtures, it is difficult to accurately align the probes with these test positions. During the test, misalignment between the probes and the pads or test points can easily occur, resulting in inaccurate test results that cannot truly reflect the electrical performance of the PCB. This may cause unqualified products to flow into subsequent production stages, affecting the quality of the final product.

[0005] Second, each time a test is performed, the position of the PCB board needs to be manually adjusted to roughly align it with the probe. This process is not only time-consuming, but also requires repeated position adjustments when testing different positions, which greatly reduces the testing efficiency. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a positioning fixture for PCB board inspection, which can effectively solve the problems existing in the prior art.

[0007] The technical solution of this utility model is:

[0008] According to one aspect of the present invention, the device includes: a mounting base and at least two positioning components for clamping a PCB board, the two positioning components being mirror-arranged on the mounting base in a forward and backward movable manner; each positioning component includes a sliding seat and a telescopic rod, the mounting base being provided with a sliding groove, the sliding seat being movably embedded in the sliding groove, and the telescopic rod being inserted above the sliding seat in a vertically movable manner; it also includes a first extension plate and a second extension plate, the first extension plate and the second extension plate being fixedly disposed at a distance from one end of the telescopic rod, and a first gap for clamping the PCB board being formed between the first extension plate and the second extension plate; and it also includes a plurality of support rods for supporting the PCB board, the plurality of support rods being vertically movable and distributed at intervals on the mounting base.

[0009] Furthermore, the positioning component also includes a first screw, the telescopic rod is a cuboid, the first screw passes through the telescopic rod and is threadedly connected to the telescopic rod, the sliding seat is provided with a first mounting groove, the lower end of the first screw extends toward the first mounting groove and is provided with a rotating shaft, the rotating shaft is rotatably disposed in the first mounting groove, the outer circumferential surface of the rotating shaft is provided with an annular groove, and a bolt is assembled between the sliding seat, the telescopic rod and the rotating shaft, one end of the bolt abutting against the annular groove.

[0010] Furthermore, a limiting plate is fixed at the upper end of the first screw to prevent the telescopic rod from dislodging from the first screw, and a second gap is formed between the limiting plate and the telescopic rod.

[0011] Furthermore, it also includes a second screw, which passes through the first extension plate and is threadedly connected to the first extension plate. When the PCB board is sandwiched between the first extension plate and the second extension plate, the lower end face of the second screw abuts against the PCB board.

[0012] Furthermore, a screw cap is fixedly provided at the upper end of the second screw, and the outer circumferential surface of the screw cap is provided with anti-slip texture.

[0013] Furthermore, a rubber layer is fixed to the lower end face of the second screw.

[0014] Furthermore, it also includes a base, which is detachably fixed below the mounting seat. A cover plate is detachably covered on the top of the base. A plurality of support rods are installed inside the base. One end of each of the support rods passes through the cover plate and the mounting seat. Each of the support rods is equipped with an elastic reset member at its lower end. A boss is fixed on the lower end face of the support rod, and the upper end face of the boss abuts against the lower end face of the cover plate.

[0015] Furthermore, the elastic reset element is a compression spring, and the base is provided with a plurality of second mounting slots for mounting the compression spring.

[0016] Furthermore, a rubber layer is fixed to the upper end face of several of the support rods.

[0017] Furthermore, several of the aforementioned support rods are distributed on the left and right sides of the slide groove.

[0018] By adopting the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0019] Firstly, by setting up a mirror positioning component that can move back and forth and an adjustable first gap, the PCB board can be precisely clamped and fixed, allowing the probe to accurately align with the pads or test points, effectively avoiding misalignment and ensuring the authenticity and reliability of the test results. The mirror positioning component can clamp both sides of the PCB board simultaneously and can flexibly adjust the spacing and height according to the size of the PCB board, reducing the time spent manually adjusting the PCB board position during each test. At the same time, the uniform support force of the support rod also ensures the stability of the PCB board during the test, allowing the probe to quickly and accurately contact the test point, thereby improving the test efficiency.

[0020] Secondly, the threaded engagement between the first screw and the telescopic rod allows for precise adjustment of the telescopic height, enhancing the controllability of the clamping force; the limiting plate prevents the telescopic rod from detaching, improving operational safety.

[0021] Thirdly, by setting a second screw and a rubber layer on the second screw, a flexible clamping force in the vertical direction is provided, which not only avoids scratching the PCB board surface, but also ensures the clamping firmness; the anti-slip texture of the screw cap improves the ease of operation.

[0022] Fourth, the detachable design of the base and support rods facilitates maintenance and replacement of the elastic reset components; the combination of the compression spring and the rubber layer of the support rods further enhances the uniformity of support and impact resistance. The support rods are distributed on both sides of the slide, forming a symmetrical support structure, effectively distributing the force on the PCB board and preventing deviation during the testing process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0026] Figure 3 This is a three-dimensional structural diagram of the positioning component in this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the present invention. Figure 1 ;

[0028] Figure 5 This is a schematic cross-sectional view of the present invention. Figure 2 ;

[0029] Figure 6 This is a schematic diagram of the planar structure of the PCB board clamping device of this utility model;

[0030] In the diagram: Mounting base-1, Fixing plate-11, Slide groove-12, Through hole-13, Positioning component-2, Second gap-20, Sliding seat-21, First mounting groove-211, Telescopic rod-22, First extension plate-221, Second extension plate-222, First gap-223, First screw-23, Limiting plate-231, Handle-232, Rotating shaft-233, Annular groove-234, Second screw-24, Rotary cap-241, Base-3, Cover plate-31, Second mounting groove-32, Support rod-4, Rubber layer-41, Boss-42, Elastic reset component-5, PCB board-A. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are only for illustrating the present invention and do not limit the scope of the present invention. Similarly, the following embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] like Figures 1 to 6 As shown, this solution provides a positioning fixture for PCB board inspection.

[0033] Please see Figures 1 to 3 It includes: a mounting base 1 and at least two positioning components 2 for clamping PCB board A. The two positioning components 2 are mirror-arranged on the mounting base 1 and can be moved forward and backward. The positioning component 2 includes a sliding seat 21 and a telescopic rod 22. The sliding seat 21 is inverted T-shaped. The mounting base 1 is provided with a sliding groove 12. The sliding seat 21 is movably embedded in the sliding groove 12. Specifically, the sliding groove 12 is provided through the mounting base 1. The front and rear ends of the mounting base 1 are respectively detachably fixed with fixing plates 11. The two fixing plates 11 are bolted to the mounting base 1.

[0034] The telescopic rod 22 is movably inserted above the sliding seat 21; it also includes a first extension plate 221 and a second extension plate 222, which are fixedly spaced at one end of the telescopic rod 22, and a first gap 223 for clamping the PCB board A is formed between the first extension plate 221 and the second extension plate 222; the positioning assembly 2 also includes a first screw 23, the telescopic rod 22 is a cuboid, the first screw 23 passes through the telescopic rod 22, and the first screw 23 is threadedly connected to the telescopic rod 22, the sliding seat 21 is provided with a first mounting groove 211, the lower end of the first screw 23 extends toward the first mounting groove 211 and is provided with a rotating shaft 233, the rotating shaft 233 is rotatably disposed in the first mounting groove 211, the outer circumferential surface of the rotating shaft 233 is provided with an annular groove 234, and a bolt (not shown) is assembled between the sliding seat 21, the telescopic rod 22 and the rotating shaft 233, one end of the bolt abutting against the annular groove 234.

[0035] Please see Figure 3 A limiting plate 231 is fixedly provided at the upper end of the first screw 23 to prevent the telescopic rod 22 from dislodging from the first screw 23. A second gap 20 is formed between the limiting plate 231 and the telescopic rod 22. In this embodiment, a handle 232 is fixedly provided at the upper end of the limiting plate 231 to facilitate the user to rotate the first screw 23. A second screw 24 is also included. The second screw 24 passes through the first extension plate 221 and is threadedly connected to the first extension plate 221. When the PCB board A is sandwiched between the first extension plate 221 and the second extension plate 222, the lower end face of the second screw 24 abuts against the PCB board A. Preferably, a screw cap 241 is fixedly provided at the upper end of the second screw 24, and the outer peripheral surface of the screw cap 241 is provided with anti-slip texture. A rubber layer 41 is fixedly provided at the lower end face of the second screw 24.

[0036] Please see Figures 1 to 6 The system also includes several support rods 4 for supporting the PCB board, which are spaced apart and movable up and down on the mounting base 1. Specifically, it also includes a base 3, which is detachably fixed to the bottom of the mounting base 1. A cover plate 31 is detachably mounted on top of the base 3, and the cover plate 31 is fixedly connected to the base 3 by screws. After the cover plate 31 is fixedly connected to the base 3, it is then fixedly connected to the bottom of the mounting base 1 by screws. The detachable design of the base 3 and the mounting base 1 facilitates maintenance or replacement of the support rods 4 and the elastic reset components 5. Several support rods 4 are installed inside the base 3, with one end of each support rod 4 passing through the cover plate 31 and the mounting base 1. Each support rod 4 has an elastic reset component 5 mounted at its lower end. A boss 42 is fixedly mounted on the lower end face of the support rod 4, and the upper end face of the boss 42 abuts against the lower end face of the cover plate 31. The elastic reset component 5 is a compression spring, and the base 3 is provided with several second mounting slots 32 for mounting the compression springs. A rubber layer 41 is fixed to the upper surface of several support rods 4. Several support rods 4 are distributed on the left and right sides of the slide groove 12.

[0037] Working principle:

[0038] The PCB board A to be inspected is placed horizontally above the mounting base 1, i.e., on several support rods 4, and initially clamped by two sets of positioning components 2 arranged in a mirror-symmetrical manner. By pushing the sliding base 21 to move back and forth along the slide groove 12, the distance between the two sets of positioning components 2 can be adjusted to accommodate PCB boards of different sizes;

[0039] Rotate the handle 232 of the first screw 23 to drive the telescopic rod 22 to move up and down through the threaded engagement, thereby adjusting the height of the first gap 223 by the first extension plate 221 and the second extension plate 222, so that the edge of the PCB board A is embedded in the first gap 223. Further rotate the cap 241 of the second screw 24 to make the rubber layer 41 on the lower end face of the second screw 24 press down against the PCB board A through the threaded transmission, ensuring that it is stable and fixed in the horizontal direction, while avoiding scratching the surface of the PCB board A.

[0040] Several support rods 4 are distributed on the left and right sides of the slide groove 12. Through the elastic force of the elastic reset element 5, such as the compression spring, the support rods 4 can move up and down adaptively. When the PCB board A is placed, the rubber layer 41 on the upper end of the support rod 4 contacts the bottom of the PCB board A, providing uniform support force and preventing the PCB board A from bending or displacing due to uneven force during the testing process.

[0041] If the position of PCB board A needs to be adjusted, the second screw 24 can be loosened and the front and rear positions of the sliding seat 21 can be finely adjusted, and then tightened again to ensure that the probe is accurately aligned with the detection point.

[0042] After the test is completed, the second screw 24 is rotated in the opposite direction to release PCB board A, and the elastic reset component 5 pushes the support rod 4 to reset to the initial position.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A positioning fixture for PCB board inspection, characterized in that, include: The mounting base (1) and at least two positioning components (2) for clamping the PCB board (A) are mirror-arranged on the mounting base (1) and can move forward and backward. The positioning component (2) includes a sliding seat (21) and a telescopic rod (22). The mounting base (1) is provided with a sliding groove (12). The sliding seat (21) is movably embedded in the sliding groove (12). The telescopic rod (22) is inserted above the sliding seat (21) and can move up and down. The mounting base (1) also includes a first extension plate (221) and a second extension plate (222). The first extension plate (221) and the second extension plate (222) are fixed at a distance from one end of the telescopic rod (22). A first gap (223) for clamping the PCB board (A) is formed between the first extension plate (221) and the second extension plate (222). The mounting base (1) also includes a plurality of support rods (4) for supporting the PCB board. The plurality of support rods (4) are distributed at a distance from the mounting base (1) and can move up and down.

2. The positioning tool for detecting a PCB as claimed in claim 1, wherein, The positioning component (2) further includes a first screw (23), the telescopic rod (22) is a cuboid, the first screw (23) passes through the telescopic rod (22), and the first screw (23) and the telescopic rod (22) are threadedly connected. The sliding seat (21) is provided with a first mounting groove (211). The lower end of the first screw (23) extends toward the first mounting groove (211) and is provided with a rotating shaft (233). The rotating shaft (233) is rotatably disposed in the first mounting groove (211). The outer circumferential surface of the rotating shaft (233) is provided with an annular groove (234). A bolt is assembled between the sliding seat (21), the telescopic rod (22) and the rotating shaft (233), and one end of the bolt abuts against the annular groove (234).

3. The positioning tool for detecting a PCB as claimed in claim 2, wherein, The upper end of the first screw (23) is fixed with a limiting plate (231) for preventing the telescopic rod (22) from coming out of the first screw (23), and a second gap (20) is formed between the limiting plate (231) and the telescopic rod (22).

4. The positioning tool for detecting a PCB as claimed in claim 1, wherein, It also includes a second screw (24), which passes through the first extension plate (221) and is threadedly connected to the first extension plate (221). When the PCB board (A) is sandwiched between the first extension plate (221) and the second extension plate (222), the lower end face of the second screw (24) abuts against the PCB board (A).

5. The positioning tool for detecting a PCB as claimed in claim 4, wherein, The upper end of the second screw (24) is fixed with a swivel cap (241), and the outer circumferential surface of the swivel cap (241) is provided with anti-slip texture.

6. The positioning tool for detecting a PCB as claimed in claim 4, wherein, A rubber layer (41) is fixed on the lower end face of the second screw (24).

7. The positioning tool for detecting a PCB as claimed in claim 1, wherein, It also includes a base (3), which is detachably fixed below the mounting base (1). A cover plate (31) is detachably covered on the top of the base (3). A plurality of support rods (4) are installed inside the base (3). One end of the plurality of support rods (4) passes through the cover plate (31) and the mounting base (1). Each of the plurality of support rods (4) is equipped with an elastic reset member (5) at its lower end. A boss (42) is fixed on the lower end face of the support rod (4). The upper end face of the boss (42) abuts against the lower end face of the cover plate (31).

8. The positioning tool for detecting a PCB as claimed in claim 7, wherein, The elastic reset member (5) is a compression spring, and the base (3) is provided with a plurality of second mounting slots (32) for mounting the compression spring.

9. A positioning fixture for PCB board inspection as described in claim 1, characterized in that, A rubber layer (41) is fixed on the upper end face of several of the support rods (4).

10. The positioning tool for detecting a PCB as claimed in claim 1, wherein, Several of the support rods (4) are distributed on the left and right sides of the slide groove (12).

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