General jig for PCB (Printed Circuit Board) detection

Abstract

The utility model discloses a universal jig for PCB detection, which comprises an upper jig, a lower jig, a probe and an alignment pin, the upper jig and the lower jig have the same structure, each of the upper jig and the lower jig consists of a plurality of layers of jig plates, the adjacent plates are connected through metal copper columns, and the distance between the adjacent plates is adjustable; probe holes, double-density alignment holes and quadruple-density alignment holes are drilled in the upper jig and the lower jig in an alignment mode, and probes are located in the probe holes; when the upper jig and the lower jig are installed, the double-density alignment holes or the quadruple-density alignment holes are selected to be installed and fixed through the alignment pins according to different density testing machines, and then the PCB is installed between the upper jig and the lower jig to be tested. By arranging the alignment holes matched with the double or quadruple density testing machine, the detection jig can be installed on the two testing machines, the universal function is achieved, the testing efficiency of a machine table is improved, the manufacturing cost is saved, meanwhile, the number of layers of the jig is reduced, and the jig drilling time and the jig assembling efficiency are saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to PCB detection fixture technical field especially relates to a PCB detection universal fixture. BACKGROUND

[0002] Traditional double density test fixture is only applicable to double density test model, four times density test fixture is only applicable to four times density test model, and four times density test fixture is mostly made of twelve layers or even seventeen layers or more, due to the problem of non-matching of fixture and machine, a plurality of test fixtures need to be set up for various models, resulting in cost waste and low productivity of test department, therefore, the utility model provides a PCB detection universal test fixture, which can be used for double density and four times density test models to improve the test efficiency of test department machine and save the manufacturing cost, and reduce the number of layers of the fixture to save the drilling time of the fixture and the assembly efficiency of the fixture. SUMMARY

[0003] In view of the above-mentioned technical problems that the conventional test fixture cannot be used for double density and four times density test models simultaneously, the utility model provides a PCB detection universal fixture.

[0004] To achieve the above-mentioned purpose, the utility model provides a PCB detection universal fixture, which comprises an upper fixture, a lower fixture, a probe and a positioning pin, the upper fixture and the lower fixture are structurally identical, the upper fixture and the lower fixture are both composed of a plurality of layers of fixture plate materials, and the adjacent plate materials are connected through metal copper columns, and the spacing between the adjacent plate materials is adjustable, the upper fixture and the lower fixture are provided with probe holes, double density positioning holes and four times density positioning holes, the probe is located in the probe hole, when the upper fixture and the lower fixture are installed, the double density positioning hole or the four times density positioning hole is selected according to the different density test machines to be installed and fixed through the positioning pin, and then the PCB board is installed between the upper fixture and the lower fixture for testing.

[0005] As an improved scheme of the utility model, the upper fixture and the lower fixture both comprise a top plate, a connecting plate and a bottom plate, the top plate and the bottom plate are fixedly connected through the metal copper column, an isolation ring is sleeved on the metal copper column, and the bottom plate, the connecting plate and the top plate are connected through the isolation ring to adjust the spacing between the adjacent plate materials.

[0006] As an improved scheme of the utility model, the corner position of the upper fixture and the lower fixture is provided with a positioning rod, so that the bottom plate, the connecting plate and the top plate are accurately positioned.

[0007] As an improved scheme of the utility model, the upper fixture and the lower fixture are drilled with fixed holes corresponding to double density testing machines and four times density testing machines, so that the upper fixture and the lower fixture are fixedly installed on the double density testing machines and the four times density testing machines.

[0008] As an improved scheme of the utility model, the plate material of the upper fixture and the lower fixture is FR-4 epoxy plate.

[0009] As an improved scheme of the utility model, the diameter of the metal pillar is 2.0mm or 5.00mm.

[0010] As an improved scheme of the utility model, the isolation ring is a plastic steel isolation ring.

[0011] As an improved scheme of the utility model, the number of the connecting plates is eight.

[0012] The utility model discloses a PCB detection universal fixture, including upper fixture, lower fixture, probe and counter pin, the upper fixture and the lower fixture structure are same, and the upper fixture and the lower fixture are all by multilayer fixture plate material composition, and the metal copper column is connected between each adjacent plate material, and the spacing of adjacent plate material is adjustable. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the three -dimensional schematic diagram of the utility model;

[0014] Fig. 2 It is the plan view of the utility model.

[0015] The following mainly element symbol explains: 1, top plate;2, bottom plate;3, connecting plate;4, metal copper column;5, isolation ring;6, double density counter hole;7, four times density counter hole;9, probe hole. PREFERRED EMBODIMENT

[0016] In order to more clearly express the utility model, the utility model is further described below in combination with the drawings.

[0017] In the following description, the example details are given in order to provide a more thorough understanding of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and are not all the embodiments. It should be understood that the specific embodiments are only used to explain the present application, and are not used to limit the present application.

[0018] It should be understood that when the terms "comprise" and / or "include" are used in the specification, it indicates the presence of the stated features, integers, steps, operations, elements, or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0019] The conventional double-density test fixture is only suitable for double-density test models, the quadruple-density test fixture is only suitable for quadruple-density test models, and the quadruple-density test fixture is usually made of twelve layers or even more than seventeen layers of structures. Due to the mismatch between the fixture and the machine, multiple sets of test fixtures need to be opened for various models, resulting in cost waste and low productivity of the test department. Therefore, the present application provides a PCB detection universal test fixture which can be used for double-density and quadruple-density test models to improve the test efficiency of the test department and save the manufacturing cost, and at the same time, the number of layers of the fixture is reduced to save the drilling time of the fixture and improve the assembly efficiency of the fixture.

[0020] Please refer to Figs. 1-2 The universal test fixture for PCB detection comprises an upper fixture, a lower fixture, a probe, and a positioning pin. The upper fixture and the lower fixture are structurally identical, and are both composed of multiple layers of fixture plates. The adjacent plates are connected by metal copper columns 4, and the spacing between the adjacent plates is adjustable. The upper fixture and the lower fixture are provided with probe holes 9, double-density positioning holes 6, and quadruple-density positioning holes 7. The probe is located in the probe hole 9. When the upper fixture and the lower fixture are installed, the double-density positioning hole 6 or the quadruple-density positioning hole 7 is selected according to the different density test machines to be installed and fixed by the positioning pin, and then the PCB board is installed between the upper fixture and the lower fixture for testing. After the upper and lower fixtures are installed, the PCB board is placed between the upper and lower fixtures for clamping detection. The positioning pin is used to ensure the accurate alignment of the upper and lower fixtures to avoid detection errors. When the probe on the upper fixture and the lower fixture contacts the test points of the PCB board, it is determined whether it is a normal line conduction. The same detection universal fixture can be used for PCBs with different densities. The different density positioning holes are combined with the PCB boards with different densities for detection, so that different detection fixtures do not need to be replaced, the cost of the fixture is reduced, and the productivity of the production is improved.

[0021] The working principle of the present application is as follows:

[0022] In practical application of the product, first, the upper jig and the lower jig are correspondingly installed on the multiple-density testing device, and the hole position suitable for the density testing machine is fixed according to the use of the density testing machine. Since the jig of the application is provided with the density alignment holes corresponding to the double-density testing machine and the four-density testing machine, only the different density alignment holes need to be installed in use, without the need to replace the jig or the different density testing machines. The PCB board is placed between the upper jig and the lower jig, and the probes in the probe holes 9 are used to test the on-off circuit of the circuit on the PCB board.

[0023] In another embodiment, all the technical features of the above embodiments are included, the upper jig and the lower jig each include a top plate, a connecting plate 3 and a bottom plate 2, the top plate 1 and the bottom plate 2 are fixedly connected through the peripheral metal copper column 4, the metal copper column 4 is sleeved with an isolation ring 5, the bottom plate 2, the connecting plate 3 and the top plate 1 are connected through the isolation ring 5 to adjust the spacing between adjacent plates; the top plate, the connecting plate 3 and the bottom plate 2 are fixedly connected with each other through the peripheral copper column, so that the overall structure of the upper jig and the lower jig is stable, and the jig is not easy to be misaligned and dispersed when clamping the PCB board to detect the circuit, and the isolation ring 5 is arranged to adjust the gap spacing between adjacent plates, the isolation ring 5 is sleeved on the peripheral metal copper column 4, and the middle plate is separated according to the height of the isolation ring 5; the isolation ring 5 is made of plastic steel material, and the specification is 5.0*15*5.4mm.

[0024] In another embodiment, all the technical features of the above embodiments are included, the number of connecting plates is eight, and the number of connecting plates plus the top plate and the bottom plate constitutes a ten-layer architecture universal jig.

[0025] In another embodiment, all the technical features of the above embodiments are included, the angle position of the upper jig and the lower jig is provided with a positioning rod, so that the bottom plate, the connecting plate and the top plate are accurately aligned.

[0026] The advantage of the utility model lies in:

[0027] The utility model discloses the alignment hole of double and four density testing machines, so that the jig can be matched with various models, improve the machine test efficiency and save the manufacturing cost, reduce the number of layers of jig at the same time, save the drilling time of jig and the assembly efficiency of jig.

[0028] The above disclosure is only a few specific embodiments of the utility model, but the utility model is not limited to this, any change that can be thought of by any person skilled in the art should fall within the protection scope of the utility model.

Claims

1. A PCB detection universal jig comprising an upper jig, a lower jig, a probe and a positioning pin, the upper jig and the lower jig are structurally identical, characterized in that, The upper fixture and the lower fixture are both composed of multiple layers of fixture plate materials, and each adjacent plate material is connected by a metal copper column, and the spacing between adjacent plate materials is adjustable; the upper fixture and the lower fixture are respectively provided with probe holes, double-density alignment holes and four-fold density alignment holes, and the probe is located in the probe hole; when the upper fixture and the lower fixture are installed, according to the different density testers, the double-density alignment holes or the four-fold density alignment holes are selected to be installed and fixed by alignment pins, and then the PCB board is installed between the upper fixture and the lower fixture for testing.

2. The universal jig for PCB detection according to claim 1, wherein, The upper fixture and the lower fixture each include a top plate, a connecting plate and a bottom plate, the top plate and the bottom plate are fixedly connected by the metal copper column, an isolation ring is sleeved on the metal copper column, and the bottom plate, the connecting plate and the top plate are connected by the isolation ring to adjust the spacing between adjacent plate materials.

3. The universal test fixture of claim 1, wherein: The upper fixture and the lower fixture are respectively provided with fixed holes corresponding to double-density testers and four-fold density testers, so that the upper fixture and the lower fixture are fixedly installed on the double-density testers and the four-fold density testers.

4. The universal test fixture of claim 1, wherein, The plate materials of the upper fixture and the lower fixture are FR-4 epoxy plates.

5. The universal test fixture of claim 1, wherein, The diameter of the metal copper column is 2.0 mm or 5.00 mm.

6. The universal test fixture for PCBs of claim 2, wherein, The corner position of the upper fixture and the lower fixture is provided with a positioning rod, so that the bottom plate, the connecting plate and the top plate are accurately aligned.

7. The universal test fixture for PCBs of claim 2, wherein, The isolation ring is a plastic steel isolation ring.

8. The universal test fixture for PCBs of claim 2, wherein, The number of the connecting plates is eight.

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