PCBA test fixture

Abstract

The utility model provides a kind of PCBA test fixture, it is related to PCBA test fixture technical field, the utility model includes test stand, the upper top of test stand is fixedly connected with support frame, the side surface of support frame is provided with support, the side surface of support is rotatably connected with rotating rod, the side surface of rotating rod is fixedly connected with handle, one end of rotating rod is rotatably connected with connecting rod, one end of connecting rod is rotatably connected with extruding rod, and one end of extruding rod is provided with extruding plate, the upper top of test stand is fixedly connected with operation table, the bottom of extruding plate is fixedly connected with metal probe, the surface of extruding rod is provided with replacement device, the replacement device includes sleeve rod that is sleeved on the surface of extruding rod, the inner wall of sleeve rod is provided with clamping groove, the surface of extruding rod is fixedly connected with clamping block, the surface of extruding rod is fixedly connected with snap ring, the utility model solves the problem that metal probe fixed on the surface of test fixture is inconvenient to detect different circuit board of welding point.

Description

Technical Field

[0001] This utility model relates to the field of PCBA test fixture technology, and in particular to a PCBA test fixture. Background Technology

[0002] Test fixtures are specialized tools used to test and experiment with the functionality, power calibration, lifespan, and performance of products. Many fixtures arise from commercial needs, as many types are custom-made to improve productivity, repeat specific actions, or enhance precision. Because fixture design is fundamentally based on logic, similar fixtures may be created for different times and locations of use. Test fixtures are frequently used for testing PCBAs.

[0003] The inventors discovered during routine use of testing fixtures that circuit boards are typically tested using metal probes. However, since the solder joints on the circuit board surface are located at different positions, the position of the metal probes is fixed, making it inconvenient to test different circuit boards and thus causing problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a PCBA test fixture.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a PCBA test fixture, comprising a test frame, a support frame fixedly connected to the top of the test frame, a bracket provided on the side of the support frame, a rotating rod rotatably connected to the side of the bracket, a handle fixedly connected to the side of the rotating rod, a connecting rod rotatably connected to one end of the rotating rod, a pressing rod rotatably connected to one end of the connecting rod, a pressing plate provided at one end of the pressing rod, an operating table fixedly connected to the top of the test frame, a metal probe fixedly connected to the bottom of the pressing plate, a replacement device provided on the surface of the pressing rod, the replacement device comprising a sleeve rod sleeved on the surface of the pressing rod, and a retaining ring fixedly connected to the surface of the pressing rod.

[0006] The effect achieved by the above components is as follows: under the action of the retaining ring, the sleeve rod can be locked onto the surface of the extrusion rod, thereby fixing the extrusion plate. When the circuit board needs to be tested, the circuit board is placed on the surface of the operating table, and the handle is held by hand, so that the extrusion rod moves down under the action of the rotating rod and the connecting rod, thereby squeezing the extrusion plate down, thus making the metal probe fit with the circuit board, thereby achieving the function of testing the circuit board.

[0007] Preferably, the inner wall of the sleeve rod is provided with a slot, and a locking block is fixedly connected to the surface of the extrusion rod.

[0008] The effect achieved by the above components is that, under the action of the locking block and the locking slot, the sleeve rod will not rotate during installation, thus avoiding the displacement of the metal probe.

[0009] Preferably, a locking rod is inserted into the surface of the sleeve rod, and one end of the locking rod is inserted into the interior of the extrusion rod.

[0010] The effect achieved by the above components is that, under the action of the clamping rod, the sleeve rod is fixed on the surface of the extrusion rod, thereby achieving the function of fixing the extrusion plate.

[0011] Preferably, a spring is sleeved on the surface of the clamping rod, and the two ends of the spring are fixedly connected to one end of the clamping rod on the surface of the sleeve rod.

[0012] The effect achieved by the above components is that, under the action of the spring, the locking rod will not slip out of the inside of the squeezing rod, thereby avoiding separation.

[0013] Preferably, the upper top of the sleeve is threaded with a bolt, one end of which abuts against the surface of the clamp.

[0014] The aforementioned components achieve the following effects: The bolts fix the position of the clamping rod, thus securing it. When the extrusion plate needs replacement, the bolts are pulled out of the sleeve, the clamping rod is pulled outwards to separate it from the extrusion rod, and the extrusion plate is pulled down to separate it from the extrusion rod. The new extrusion plate is then fitted onto the surface of the extrusion rod via the sleeve. The clamping block and slot prevent the sleeve from rotating during installation, avoiding displacement of the metal probe. The retaining ring allows the sleeve to be secured to the surface of the extrusion rod, thus fixing the extrusion plate. After the sleeve is fully fitted onto the surface of the extrusion rod, the clamping rod is inserted into the extrusion rod. The spring prevents the clamping rod from slipping out of the extrusion rod, thus preventing separation. The bolts are then screwed into the sleeve to fix the position of the clamping rod, thereby achieving the purpose of replacing the extrusion plate.

[0015] Preferably, the surface of the operating table is provided with a fixing device, the fixing device includes a groove formed inside the operating table, the groove has a through groove inside, and a TUXING high-pressure air pump is fixedly connected to the side of the operating table.

[0016] The effect achieved by the above components is that, under the action of the TUXING high-pressure air pump, suction is generated inside the through groove and the recess, thereby fixing the circuit board to the surface of the operating table and thus achieving the function of fixation.

[0017] Preferably, a rectangular groove is provided on the top of the operating table, a circuit board is installed inside the rectangular groove, and a pad, which is a rubber plate, is fixedly connected inside the rectangular groove.

[0018] The effect achieved by the above components is that, under the action of the pad and the rectangular groove, the circuit board can be stuck inside the rectangular groove, thus preventing the circuit board from shifting.

[0019] Preferably, a stop block is inserted inside the through groove, and a rubber ring is fixedly connected to the surface of the stop block.

[0020] The aforementioned components achieve the following effects: The stop block blocks the through-slot, thus preventing the need for suction. When a circuit board needs to be secured, it is positioned inside the rectangular groove. The pad prevents the board from being completely lodged, avoiding the inconvenience of removal. Once the board is inside the groove, the TUXING high-pressure air pump is activated, generating suction between the through-slot and the groove, thus lifting the board onto the worktable surface. If the board cannot completely cover the through-slot, the stop block is inserted into the exposed section, blocking any unnecessary suction and securing the circuit board.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] In this invention, by setting up a replacement device, when the extrusion plate needs to be replaced, the bolt is pulled out from the inside of the sleeve rod, the locking rod is pulled outward to separate it from the extrusion rod, the extrusion plate is pulled down to separate it from the extrusion rod, and the new extrusion plate is sleeved onto the surface of the extrusion rod through the sleeve rod. Under the action of the locking block and the locking groove, the sleeve rod will not rotate during installation, avoiding the displacement of the metal probe. Under the action of the locking ring, the sleeve rod can be locked onto the surface of the extrusion rod, thereby achieving the function of fixing the extrusion plate. After the sleeve rod is completely sleeved onto the surface of the extrusion rod, the locking rod is inserted into the inside of the extrusion rod. Under the action of the spring, the locking rod will not slip out of the inside of the extrusion rod, thus avoiding separation. The bolt is screwed into the inside of the sleeve rod to fix the position of the locking rod, thereby achieving the function of replacing the extrusion plate. This solves the problem that metal probes fixed on the surface of the test fixture are inconvenient for testing circuit boards with different solder points. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a PCBA test fixture is provided for this utility model;

[0024] Figure 2A schematic diagram of a PCBA test fixture replacement device is provided for this utility model;

[0025] Figure 3 A schematic diagram of a fixing device for a PCBA test fixture is provided for this utility model;

[0026] Figure 4 A flowchart illustrating the working principle of a PCBA test fixture is provided for this utility model.

[0027] Legend: 1. Test frame; 2. Replacement device; 21. Sleeve rod; 22. Clamping block; 23. Clamping ring; 24. Clamping rod; 25. Spring; 26. Bolt; 3. Fixing device; 31. Rectangular groove; 32. Pad plate; 33. Groove; 34. TUXING high-pressure air pump; 35. Through groove; 36. Stop block; 4. Support frame; 5. Operating table; 6. Bracket; 7. Extrusion plate; 8. Extrusion rod; 9. Metal probe. Detailed Implementation

[0028] Example 1, such as Figure 1 A PCBA test fixture includes a test frame 1, a support frame 4 fixedly connected to the top of the test frame 1, a bracket 6 provided on the side of the support frame 4, a rotating rod rotatably connected to the side of the bracket 6, a handle fixedly connected to the side of the rotating rod, a connecting rod rotatably connected to one end of the rotating rod, a pressing rod 8 rotatably connected to one end of the connecting rod, a pressing plate 7 provided at one end of the pressing rod 8, an operating table 5 fixedly connected to the top of the test frame 1, a metal probe 9 fixedly connected to the bottom of the pressing plate 7, and a replacement device 2 provided on the surface of the pressing rod 8.

[0029] Working principle: When testing a circuit board, place the circuit board on the surface of the operating table 5, hold the handle, and the pressing rod 8 will move downward under the action of the rotating rod and the connecting rod, thereby pressing the pressing plate 7 downward, thus bringing the metal probe 9 into contact with the circuit board, thereby achieving the purpose of testing the circuit board. The circuit board testing is divided into continuity testing and functional testing.

[0030] Continuity testing (ICT testing): Detects the continuity of a circuit and determines whether there are short circuits or open circuits at solder joints or in the wiring.

[0031] Functional Testing (FCT): Simulates the actual operating environment, verifies the hardware functionality and software stability by inputting excitation signals and measuring response parameters.

[0032] Reference Figure 2The replacement device 2 includes a sleeve 21 sleeved on the surface of the extrusion rod 8. A retaining ring 23 is fixedly connected to the surface of the extrusion rod 8. A retaining groove is opened on the inner wall of the sleeve 21. A retaining block 22 is fixedly connected to the surface of the extrusion rod 8. A retaining rod 24 is inserted into the surface of the sleeve 21. One end of the retaining rod 24 is inserted into the interior of the extrusion rod 8. A spring 25 is sleeved on the surface of the retaining rod 24. The two ends of the spring 25 are fixedly connected to the surface of the sleeve 21 and one end of the retaining rod 24, respectively. A bolt 26 is threadedly connected to the top of the sleeve 21. One end of the bolt 26 abuts against the surface of the retaining rod 24.

[0033] Working principle: When the extrusion plate 7 needs to be replaced, the bolt 26 is pulled out from the inside of the sleeve 21, the locking rod 24 is pulled outward to separate it from the extrusion rod 8, the extrusion plate 7 is pulled down to separate it from the extrusion rod 8, and the new extrusion plate 7 is fitted onto the surface of the extrusion rod 8 through the sleeve 21. Under the action of the locking block 22 and the locking groove, the sleeve 21 will not rotate during installation, avoiding the displacement of the metal probe 9. Under the action of the retaining ring 23, the sleeve 21 can be locked onto the surface of the extrusion rod 8, thereby achieving the function of fixing the extrusion plate 7. After the sleeve 21 is fully fitted onto the surface of the extrusion rod 8, the locking rod 24 is inserted into the inside of the extrusion rod 8. Under the action of the spring 25, the locking rod 24 will not slip out of the inside of the extrusion rod 8, thereby avoiding separation. The bolt 26 is screwed into the inside of the sleeve 21 to fix the position of the locking rod 24, thus achieving the function of replacing the extrusion plate 7.

[0034] Reference Figure 3 The surface of the operating table 5 is provided with a fixing device 3. The fixing device 3 includes a groove 33 opened inside the operating table 5. A through groove 35 is opened inside the groove 33. A TUXING high-pressure air pump 34 is fixedly connected to the side of the operating table 5. A rectangular groove 31 is opened at the top of the operating table 5. A circuit board is inserted inside the rectangular groove 31. A pad 32 is fixedly connected inside the rectangular groove 31. The pad 32 is a rubber plate. A stop block 36 is inserted inside the through groove 35. A rubber ring is fixedly connected to the surface of the stop block 36.

[0035] Working principle: When it is necessary to fix the circuit board, the circuit board is inserted into the rectangular groove 31. With the action of the pad 32, the circuit board is not completely stuck inside the rectangular groove 31, thus avoiding the phenomenon that the circuit board is stuck inside the rectangular groove 31 and is inconvenient to remove. After the circuit board is inserted into the rectangular groove 31, the TUXING high-pressure air pump 34 is activated, which generates suction inside the through groove 35 and the recess 33, thereby sucking the circuit board to the surface of the operating table 5. If the circuit board cannot completely cover the through groove 35, the stop block 36 is inserted into the exposed through groove 35, thereby blocking the through groove 35 that does not need to generate suction, thus achieving the function of fixing the circuit board.

Claims

1. A PCBA test fixture, comprising a test frame (1), a support frame (4) fixedly connected to the top of the test frame (1), a bracket (6) provided on the side of the support frame (4), a rotating rod rotatably connected to the side of the bracket (6), a handle fixedly connected to the side of the rotating rod, a connecting rod rotatably connected to one end of the rotating rod, a pressing rod (8) rotatably connected to one end of the connecting rod, a pressing plate (7) provided at one end of the pressing rod (8), an operating table (5) fixedly connected to the top of the test frame (1), and a metal probe (9) fixedly connected to the bottom of the pressing plate (7), characterized in that: The surface of the extrusion rod (8) is provided with a replacement device (2), the replacement device (2) includes a sleeve rod (21) sleeved on the surface of the extrusion rod (8), and a retaining ring (23) is fixedly connected to the surface of the extrusion rod (8).

2. The PCBA test fixture according to claim 1, characterized in that: The inner wall of the sleeve rod (21) is provided with a slot, and the surface of the extrusion rod (8) is fixedly connected with a locking block (22).

3. The PCBA test fixture according to claim 2, characterized in that: A locking rod (24) is inserted into the surface of the sleeve rod (21), and one end of the locking rod (24) is inserted into the interior of the extrusion rod (8).

4. The PCBA test fixture according to claim 3, characterized in that: A spring (25) is fitted on the surface of the lever (24), and the two ends of the spring (25) are fixedly connected to one end of the lever (24) on the surface of the sleeve (21).

5. The PCBA test fixture according to claim 4, characterized in that: The top of the sleeve rod (21) is threaded with a bolt (26), one end of which abuts against the surface of the clamp rod (24).

6. The PCBA test fixture according to claim 5, characterized in that: The surface of the operating table (5) is provided with a fixing device (3), the fixing device (3) includes a groove (33) opened inside the operating table (5), the groove (33) is provided with a through groove (35), and an air pump (34) is fixedly connected to the side of the operating table (5).

7. The PCBA test fixture according to claim 6, characterized in that: The top of the operating table (5) is provided with a rectangular groove (31), a circuit board is installed inside the rectangular groove (31), and a pad (32) is fixedly connected inside the rectangular groove (31). The pad (32) is a rubber plate.

8. The PCBA test fixture according to claim 7, characterized in that: A stop block (36) is inserted inside the through groove (35), and a rubber ring is fixedly connected to the surface of the stop block (36).

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