Tool clamp for assisting circuit board test

Abstract

The utility model relates to the field of flying probe test PCB clamping, and discloses a tool clamp for assisting circuit board test, which comprises a magnetic clamping plate strip and an auxiliary side clamping mechanism for clamping the magnetic clamping plate strip. The magnetic clamping plate strip comprises an L-shaped bakelite plate and a flat bakelite plate, an adhesive tape is fixedly arranged on one side of the L-shaped bakelite plate and connected with the flat bakelite plate in a pasted mode, the L-shaped bakelite plate is rotationally connected with the flat bakelite plate, magnets distributed in an array mode are fixed to the L-shaped bakelite plate and the flat bakelite plate, and the magnets on the L-shaped bakelite plate and the magnets on the flat bakelite plate are correspondingly arranged. According to the utility model, the auxiliary side clamp mechanism clamps the bakelite plate, the bakelite plate safely clamps the PCB and protects the PCB, the two sides of the PCB are respectively provided with a fulcrum as an auxiliary support and stabilizes the PCB, so that the test needle can accurately and efficiently detect the corresponding pad, the PCB is better, stably and reliably fixed on the clamp plate device by using the auxiliary side clamp, and the test efficiency is improved. Therefore, the distance from the test needle to the test surface is always kept unchanged, and the test quality of the flying probe tester is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of flying probe test PCB board clamping, in particular to a tool fixture for assisting circuit board test. BACKGROUND

[0002] The current trend of overall consumer electronics is developing towards high intelligence, thinness and portability, and this development trend requires the PCB products in consumer electronics to be improved continuously. The PCB product with the largest proportion in mobile terminals is HDI board, and its proportion is more than 40%. At present, China vigorously promotes 5G mobile phones, computers and other consumer electronic products, and it can be predicted that the high-level HDI products will develop rapidly in the future, and the proportion will be improved continuously. The trend of higher integration, lighter and more space-saving of parts in mobile terminals will further promote the upgrading and development of HDI board and RF board. The PCB board will develop towards high density, high precision, fine aperture, fine wire, fine pitch, high reliability, multi-layer, high speed transmission, lightness and thinness, and the size will become thinner, smaller and more complex.

[0003] For a large-size PCB board, through the existing clamping plate device of the flying probe tester, during the test process, especially when the probe detects the middle part of the PCB board, due to the high acceleration and deceleration of the X-axis and the Y-axis, the whole machine equipment vibrates greatly, so that the PCB board fixed by the clamping plate device, especially the board with large and thin size, is more likely to vibrate in the front and back directions. This kind of unavoidable vibration can easily cause the test needle to be deviated, not to be in place, and the depth of the test needle to be too deep, especially after the surface of the PCB is treated with OSP, a thin layer of organic compound is formed on the surface of the copper, which is more likely to be damaged by the test needle during the test process, resulting in nickel leakage, deep needle printing and other defects. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a tool fixture for assisting circuit board test to solve the problems in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions.

[0006] A tool fixture for assisting circuit board test, the tool fixture is fixed on a flying probe tester, and the tool fixture comprises a magnetic clamping plate strip and an auxiliary side clamping mechanism for clamping the magnetic clamping plate strip.

[0007] The magnetic clamping plate strip comprises a bakelite L plate and a bakelite flat plate, one side of the bakelite L plate is fixedly provided with an adhesive tape, the adhesive tape is pasted and connected with the bakelite flat plate, the bakelite L plate is rotationally connected with the bakelite flat plate, an array of magnets for attraction is fixed on the bakelite L plate and the bakelite flat plate, and the magnets on the bakelite L plate and the bakelite flat plate are correspondingly arranged.

[0008] Furthermore, the tooling fixture also includes a drive structure symmetrically fixed inside the flying probe testing machine, with a lower clamp fixed on the flying probe testing machine and an upper clamp sliding on the drive structure.

[0009] Furthermore, the auxiliary side clamp mechanism includes a right auxiliary side clamp with hook-type installation. The right auxiliary side clamp includes an auxiliary bracket and a knurled nut. One end of the auxiliary bracket is provided with an installation groove, and the other end is provided with a hook. A flat knob is threaded to one side of the hook. The flat knob passes through the auxiliary bracket and is connected to the upper clamp. A fixed clamp and a movable clamp are fixed at the installation groove.

[0010] Furthermore, the auxiliary side clamping mechanism includes a left auxiliary side clamp, which includes a support. An adjustment knob is fixed on the support. The adjustment knob passes through the support and is fixedly connected to the slider on the slide table. A fixing beam is fixed on the support. A bolt passes through the fixing beam and is threadedly connected to the support. The fixing beam is set perpendicular to the support.

[0011] A movable plate is fixed on the fixed beam. The movable plate has symmetrical through slots. An adjusting screw is fixed in the through slot. The adjusting screw passes through the through slot and is threadedly connected to the fixed beam. A fixed clamp and a movable clamp are also fixed on the movable plate.

[0012] Furthermore, a cylindrical pin is rotatably mounted on the fixed clamp, and a movable clamp is rotatably mounted on the cylindrical pin. A compression spring is fixed to one side of the movable clamp.

[0013] Furthermore, the compression spring is located between the movable clamp and the fixed clamp, the bolt passes through the movable clamp and the fixed clamp and is connected to the knurled nut, and the screw passes through the fixed clamp and the mounting groove and is threadedly connected to the knurled nut.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model tooling fixture has a simple structure. It effectively fixes the PCB board through the auxiliary side clamping mechanism on the left and right, stabilizes the PCB board, and ensures that the PCB board will not vibrate during the test. At the same time, the auxiliary side clamping mechanism holds the bakelite board, which safely clamps the PCB board, helps to protect the PCB board, and improves the working efficiency of the flying probe tester.

[0016] 2. The tooling fixture of this utility model adds a fulcrum on each side of the PCB board as an auxiliary support to stabilize the PCB board, so that the test probe can accurately and efficiently detect the corresponding pad. At the same time, by using the auxiliary side clamp, the PCB board is more stably and reliably fixed on the clamping device, so that the distance between the test probe and the test surface remains constant, which is more conducive to probe mark control and improves the test quality of the flying probe tester. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the flying probe testing machine of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the flying probe testing machine of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the flying probe testing machine of this utility model;

[0021] Figure 4 This is a front view of the tooling fixture of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the right auxiliary side clip of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the left auxiliary side clip of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the magnetic clamping strip of this utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the magnetic clamping strip of this utility model;

[0026] Figure 9 This is a top view of the magnetic clamping strip of this utility model.

[0027] The attached diagram is described below:

[0028] 1. Flying probe tester; 2. Right auxiliary side clamp; 3. Left auxiliary side clamp; 4. Magnetic clamping strip; 5. Drive structure; 6. Upper clamp; 21. Auxiliary bracket; 22. Flat knob; 23. Fixed clamp; 24. Movable clamp; 25. Compression spring; 26. Knurled nut; 27. Cylindrical pin; 30. Support; 31. Fixed beam; 32. Adjusting knob; 33. Movable plate; 34. Adjusting screw; 41. Bakelite L-plate; 42. Bakelite flat plate; 43. Magnet; 44. Adhesive tape. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] A tooling fixture for assisting in circuit board testing, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the tooling fixture is fixedly installed on the flying probe tester 1. The flying probe tester 1 is fixedly provided with symmetrically distributed drive structures 5. The flying probe tester 1 is fixedly provided with a lower clamp, which is located below the PCB board and supports the PCB board. The drive structure 5 is slidably provided with an upper clamp 6.

[0031] In this embodiment, the driving structure 5 is a slide table, and the upper clamp 6 is fixedly installed on the slider on the slide table. The driving structure 5 controls the upper clamp 6 to move up and down to clamp the upper part of the PCB board.

[0032] The tooling fixture includes magnetic clamping strips 4 and auxiliary side clamping mechanisms. The auxiliary side clamping mechanisms clamp and fix the magnetic clamping strips 4. The magnetic clamping strips 4 are located on both sides of the PCB board and clamp the two sides of the PCB board.

[0033] like Figures 7-9 As shown, the magnetic clamping strip 4 includes a bakelite L-plate 41, which is connected to an auxiliary side clamping mechanism. The auxiliary side clamping mechanism clamps the bakelite L-plate 41. A bakelite flat plate 42 is rotatably mounted on the bakelite L-plate 41. Magnets 43 are fixedly installed on both the bakelite L-plate 41 and the bakelite flat plate 42. An array of magnets 43 is fixedly mounted on the side of the bakelite L-plate 41 away from the bakelite flat plate 42. The magnets 43 on the bakelite flat plate 42 are correspondingly arranged with the magnets 43 on the bakelite L-plate 41.

[0034] Bakelite L-plate 41 and Bakelite flat plate 42 are brought close to each other under the attraction of magnet 43, and Bakelite L-plate 41 and Bakelite flat plate 42 maintain a clamping force on the PCB board.

[0035] A tape 44 is fixedly provided on one side of the bakelite L-plate 41. The tape 44 is attached to the bakelite flat plate 42, so that the bakelite flat plate 42 and the bakelite L-plate 41 maintain a rotatable connection.

[0036] The auxiliary side clamping mechanism includes a left auxiliary side clamp 3 and a right auxiliary side clamp 2, such as Figure 5 As shown, the right auxiliary side clamp 2 is a hook-type structure. The right auxiliary side clamp 2 includes an auxiliary bracket 21. One end of the auxiliary bracket 21 is provided with an installation groove, and the other end is provided with a hook. A flat knob 22 is installed on one side of the hook. The hook is fixedly installed with the upper clamp 6, so that the right auxiliary side clamp 2 is hung on the upper clamp 6. By rotating the flat knob 22, the flat knob 22 is connected to the upper clamp 6, and the right auxiliary side clamp 2 is fixed.

[0037] A fixed clamp 23 is fixedly provided at the mounting slot. A cylindrical pin 27 is rotatably provided on the fixed clamp 23. A movable clamp 24 is rotatably provided on the cylindrical pin 27. A compression spring 25 is fixedly provided on one side of the movable clamp 24. The compression spring 25 is located between the movable clamp 24 and the fixed clamp 23. A bolt passes through the movable clamp 24 and the fixed clamp 23 and is connected to the knurled nut 26. The bolt and the movable clamp 24 are slidably connected. Tightening the knurled nut 26 can make the movable clamp 24 and the fixed clamp 23 clamp the bakelite L-plate 41.

[0038] The screw passes through the fixing clip 23 and the mounting groove and is threaded to the knurled nut 26, so that the fixing clip 23 is fixedly connected to the auxiliary bracket 21.

[0039] like Figure 6 As shown, the left auxiliary side clamp 3 includes a support 30, an adjustment knob 32 is fixedly provided on the support 30, the adjustment knob 32 passes through the support 30 and is fixedly connected to the slider on the slide table, a fixed beam 31 is fixedly provided on the support 30, a bolt passes through the fixed beam 31 and is threadedly connected to the support 30, so that the fixed beam 31 is set perpendicular to the support 30, a movable plate 33 is fixedly provided on the fixed beam 31, and symmetrically distributed through slots are opened on the movable plate 33.

[0040] An adjusting screw 34 is fixedly installed in the through groove. The adjusting screw 34 passes through the through groove and is threadedly connected to the fixed beam 31. Tightening the adjusting screw 34 fixes the movable plate 33. Loosening the adjusting screw 34 can adjust the position of the movable plate 33. A fixed clamp 23 and a movable clamp 24 are also fixedly installed on the movable plate 33.

[0041] The working principle is as follows:

[0042] In this embodiment, the tooling fixture for auxiliary circuit board testing comprises two parts: the first part is a magnetic clamping strip; the second part is an auxiliary side clamping mechanism. The auxiliary side clamp can be of two types: one is a slider installed and fixed on the slide rails on both sides of the tension fixture, which moves up and down with the guide rails; the other is a hook-type structure installed and fixed on the upper clamping beam, which can move left and right along the clamping beam and move up and down with the upper clamping. The two auxiliary side clamping mechanisms are selected according to the actual usage requirements.

[0043] The magnetic clamping strip utilizes the principle that like poles of magnets repel and unlike poles attract. A row of seven rectangular blind holes is machined at the same position on the outer side of the bakelite L-plate 41 and the bakelite flat plate 42, respectively, for installing rectangular magnets 43. During installation, the magnets on the two bakelite boards are made to attract each other, thereby realizing the function of the clamping strip.

[0044] The auxiliary side clamp's gripper is tightened by manually turning the knurled nut 26 to tighten the movable clamp 24. A compression spring 25 is installed between the movable clamp 24 and the fixed clamp 23, thereby realizing the clamping action of the side clamp.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A tooling fixture for auxiliary circuit board testing, the tooling fixture being fixed on a flying probe tester (1), characterized in that, The tooling fixture includes a magnetic clamping strip (4) and an auxiliary side clamping mechanism for clamping the magnetic clamping strip (4); The magnetic clamp strip (4) includes a bakelite L-plate (41) and a bakelite flat plate (42). Adhesive tape (44) is fixedly provided on one side of the bakelite L-plate (41). The adhesive tape (44) is bonded to the bakelite flat plate (42). The bakelite L-plate (41) and the bakelite flat plate (42) are rotatably connected. Magnets (43) for attraction are fixedly arranged in an array on both the bakelite L-plate (41) and the bakelite flat plate (42). The magnets (43) on the bakelite L-plate (41) and the bakelite flat plate (42) are arranged correspondingly.

2. The tooling fixture for auxiliary circuit board testing according to claim 1, characterized in that, The tooling fixture also includes a drive structure (5) symmetrically fixed inside the flying probe tester (1), with a lower clamp fixed on the flying probe tester (1) and an upper clamp (6) sliding on the drive structure (5).

3. The tooling fixture for auxiliary circuit board testing according to claim 2, characterized in that, The auxiliary side clamp mechanism includes a right auxiliary side clamp (2) with hook-type installation. The right auxiliary side clamp (2) includes an auxiliary bracket (21) and a knurled nut (26). One end of the auxiliary bracket (21) is provided with an installation groove, and the other end is provided with a hook. One side of the hook is threaded with a flat knob (22). The flat knob (22) passes through the auxiliary bracket (21) and is connected to the upper clamp (6). A fixed clamp (23) and a movable clamp (24) are fixed at the installation groove.

4. The tooling fixture for auxiliary circuit board testing according to claim 3, characterized in that, The auxiliary side clamp mechanism includes a left auxiliary side clamp (3), the left auxiliary side clamp (3) includes a support (30), an adjustment knob (32) is fixed on the support (30), the adjustment knob (32) passes through the support (30) and is fixedly connected to the slider on the slide table, a fixing beam (31) is fixed on the support (30), a bolt passes through the fixing beam (31) and is threadedly connected to the support (30), and the fixing beam (31) is set perpendicular to the support (30); A movable plate (33) is fixed on the fixed beam (31). A through groove is symmetrically provided on the movable plate (33). An adjusting screw (34) is fixed in the through groove. The adjusting screw (34) passes through the through groove and is threadedly connected to the fixed beam (31). A fixed clamp (23) and a movable clamp (24) are also fixed on the movable plate (33).

5. The tooling fixture for auxiliary circuit board testing according to claim 4, characterized in that, A cylindrical pin (27) is rotatably mounted on the fixed clamp (23), and a movable clamp (24) is rotatably mounted on the cylindrical pin (27). A compression spring (25) is fixed on one side of the movable clamp (24).

6. The tooling fixture for auxiliary circuit board testing according to claim 5, characterized in that, The compression spring (25) is located between the movable clamp (24) and the fixed clamp (23). The bolt passes through the movable clamp (24) and the fixed clamp (23) and is connected to the knurled nut (26). The screw passes through the fixed clamp (23) and the mounting groove and is threadedly connected to the knurled nut (26).

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