Jig for FCT test of circuit board

Abstract

The utility model relates to a jig for a circuit board FCT test, which comprises a machine table, a placing space for placing a circuit board is arranged on the machine table, a plurality of movable driving seats are arranged in the placing space, telescopic clamping blocks are connected onto the driving seats, a driving plate is arranged above the machine table, an opening opposite to the placing space is arranged on the driving plate, and the driving plate is connected with the clamping blocks. A driving air cylinder is connected to the lower portion of the driving plate and used for driving the driving plate to ascend and descend so as to drive the multiple driving bases to synchronously move towards the circuit board in the containing space, so that the telescopic clamping blocks are pressed to contract to clamp the circuit board, a testing plate is arranged above the containing space, and a lifting air cylinder is connected to the upper portion of the testing plate; and the lifting cylinder is used for driving the test board to lift, so that the test board is in contact with the circuit board to complete the test of the circuit board. The circuit board clamping device has the following advantages and effects that the circuit board clamping stability in the long-time use process can be ensured, the fault occurrence rate is reduced, and debugging is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board testing, in particular to a fixture used for circuit board FCT testing. Background Art

[0002] At present, FCT and ICT tests are the most common tests for circuit boards. The structure of the test system can be divided into a test machine and a test fixture. The machine is generally composed of control modules such as industrial computers and is the core of the entire test system; while the fixture is a test fixture customized for a specific circuit board.

[0003] For example, a Chinese patent document with publication number CN216525898U discloses an FCT test fixture with automatic clamping function, including an FCT test fixture body, an outer surface of the test disc is provided with a slide rail, both sides of the inner wall of the FCT test fixture body are fixedly connected with a first cylinder and a second cylinder, the output ends of the first cylinder and the second cylinder are fixedly connected with a first telescopic rod and a second telescopic rod, the top of the fixed block is fixedly connected with a support rod, and the top of the support rod is fixedly connected with an arc-shaped clamping plate.

[0004] It can be known from the above disclosed content that when clamping the circuit board, the first cylinder and the second cylinder are started to extend and retract the first telescopic rod and drive the support rod to slide toward the middle of the slide rail, so that the arc-shaped clamping plates on both sides move toward the middle, so that the arc-shaped clamping plates can move smoothly on the test plate to clamp the product.

[0005] However, in actual use, it was found that since the arc-shaped clamping plates on both sides are respectively controlled by the first cylinder and the second cylinder, in order to prevent the circuit board from shifting due to uneven force when clamped by the arc-shaped clamping plates on both sides, the first cylinder and the second cylinder need to be controlled synchronously, which increases the complexity of programming, increases the difficulty of overall debugging, and is prone to errors, and cannot guarantee the stability of circuit board clamping during long-term use. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fixture for FCT testing of circuit boards, which can ensure the stability of circuit board clamping during long-term use, reduce the occurrence rate of failures, and facilitate debugging.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture for FCT testing of circuit boards, comprising a machine platform, a placement space for placing circuit boards is provided on the machine platform, a plurality of movable drive seats are provided in the placement space, a retractable telescopic clamp is connected to the drive seat, a drive plate is provided above the machine platform, an opening opposite to the placement space is provided on the drive plate, a drive cylinder is connected below the drive plate, the drive cylinder is used to drive the drive plate to rise and fall, so as to drive the plurality of drive seats to move synchronously toward the circuit board in the placement space, so that the telescopic clamp is compressed and contracted to clamp the circuit board, a test board is provided above the placement space, a lifting cylinder is connected above the test board, the lifting cylinder is used to drive the test board to rise and fall, so that the test board contacts the circuit board to complete the test of the circuit board.

[0008] The utility model is further configured as follows: the driving seat includes a base, a slide rail is provided on the base, a slider is provided on the slide rail, the slider is coupled to the slide rail and can form a sliding fit between the two, and the slider is located on a side away from the telescopic clamp and its height decreases gradually along the direction away from the driving plate to form an inclined coupling side wall.

[0009] The utility model is further configured as follows: the telescopic clamping block includes a fixed rod and a movable rod, a slide track is provided inside the fixed rod, one end of the movable rod is located on the slide track and can slide along the slide track, and the other end extends outside the slide track as a connecting end, the connecting end is provided with a clamping block, a mounting flange is provided on the outer periphery of the fixed rod, a spring is provided between the mounting flange and the clamping block, one end of the spring is fixed to the mounting flange, and the other end is fixed to the clamping block.

[0010] The utility model is further configured as follows: a protruding pushing block is provided at the bottom of the driving plate, and the pushing block is used to couple with the coupling side wall to push the sliding block to slide along the sliding rail.

[0011] The utility model is further configured as follows: a guide rod arranged in a vertical direction is provided on the machine platform, a guide hole coupled with the guide rod is provided on the driving plate, the guide rod passes through the guide hole, and a sliding fit between the two can be formed.

[0012] The utility model is further configured as follows: a first mounting threaded hole is provided on the base, a second mounting threaded hole is provided on the machine platform, the second mounting threaded holes are multiple and spaced apart from each other, the first mounting threaded hole can be opposite to the second mounting threaded hole, and the first mounting threaded hole and the second mounting threaded hole are fixed by bolts and nuts.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Since multiple movable drive seats are arranged in the placement space, and the drive seats can drive the drive plate to rise and fall through the drive cylinder, and the drive plate drives multiple drive seats to move synchronously toward the circuit board in the placement space, so that the telescopic clamp is compressed and contracted to clamp the circuit board. When testing the circuit board, it is only necessary to control the rise and fall of a single drive cylinder to synchronously control multiple drive seats, thereby improving the mechanical structure, reducing the programming difficulty and reducing the electrical control structure. Therefore, it effectively solves the technical problem that multiple control mechanisms are required for synchronous control in the prior art, resulting in complex programming and high overall debugging difficulty. It can ensure the stability of circuit board clamping during long-term use, reduce the occurrence of failures, and facilitate debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model when not clamped;

[0017] Figure 3 It is a schematic diagram of the internal structure of the utility model when clamping;

[0018] Figure 4 It is a partial enlarged structural schematic diagram of point A of the utility model. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] like Figures 1 to 4As shown, the utility model discloses a fixture for FCT testing of circuit boards, including a machine platform 1, a placement space 101 for placing circuit boards is provided on the machine platform 1, a plurality of movable drive seats are provided in the placement space 101, and a retractable telescopic clamping block is connected to the drive seat, a drive plate 4 is provided above the machine platform 1, and an opening 41 opposite to the placement space 101 is provided on the drive plate 4, and a drive cylinder 5 is connected below the drive plate 4, and the drive cylinder 5 is used to drive the drive plate 4 to rise and fall, so as to drive the plurality of drive seats to synchronously move toward the circuit board in the placement space 101, so that the retractable clamping block is compressed and contracted to clamp the circuit board, and a test board 6 is provided above the placement space 101, and a test board 6 is provided above the test board 6. It is connected to a lifting cylinder 7, which is used to drive the test board 6 to rise and fall, so that the test board 6 contacts the circuit board to complete the test of the circuit board. The drive seat can drive the drive plate 4 to rise and fall through the driving cylinder 5, and the driving plate 4 drives multiple drive seats to move synchronously toward the circuit board in the placement space 101, so that the telescopic clamp is compressed and contracted to achieve clamping of the circuit board. When testing the circuit board, it is only necessary to control the lifting of a single driving cylinder 5 to synchronously control multiple drive seats, so that improving the mechanical structure can reduce the difficulty of programming and reduce the electrical control structure, thereby ensuring the stability of the circuit board clamping during long-term use, reducing the occurrence of failures, and facilitating debugging.

[0022] In this embodiment, the specific structure of the driving seat includes a base 21, a slide rail 22 is provided on the base 21, and a slider 23 is provided on the slide rail 22. The slider 23 is coupled to the slide rail 22 and can form a sliding fit between the two. The slider 23 is located on the side away from the telescopic clamping block and its height decreases in the direction away from the driving plate 4 to form an inclined coupling side wall 231, and a protruding pushing block 42 is provided at the bottom of the driving plate 4. The pushing block 42 is used to couple with the coupling side wall 231 to push the slider 23 to slide along the slide rail 22. When the driving cylinder 5 drives the driving plate 4 to descend, the pushing block 42 can be coupled with the coupling side wall 231, so that the pressure generated during the downward movement of the driving plate 4 can be decomposed into a horizontal thrust, thereby pushing each slider 23 to slide on the corresponding slide rail 22, so that the telescopic clamping block can move toward the circuit board in the placement space 101, so that the telescopic clamping block completes the clamping of the circuit board, and the setting of the pushing block 42 can facilitate the contact between the driving plate 4 and the coupling side wall 231.

[0023] The cam 33 is a substantially parallel plate 35 formed on the upper and lower surfaces of the cam 35, and the cam 33 is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs,

[0024] In this embodiment, a guide rod 8 is provided on the machine table 1 along the vertical direction, and a guide hole coupled to the guide rod 8 is provided on the driving plate 4. The guide rod 8 passes through the guide hole. In the process of the driving cylinder 5 driving the driving plate 4 to move up and down, the guide rod 8 and the guide hole can form a sliding fit between the two, which plays a guiding role in the moving path of the driving plate 4, thereby making the movement of the driving plate 4 more stable.

[0025] In this embodiment, a first mounting threaded hole is further provided on the base 21, and a second mounting threaded hole 9 is provided on the machine 1. The second mounting threaded holes 9 are multiple and spaced apart from each other. The first mounting threaded hole can be opposite to the second mounting threaded hole 9. The first mounting threaded hole and the second mounting threaded hole 9 are fixed by bolts 200 and nuts 300. By providing multiple second mounting threaded holes 9 and providing a first mounting threaded hole on the base 21 that can cooperate with the second mounting threaded hole 9, a detachable connection can be formed between the base 21 and the machine 1. Therefore, during debugging, the sliding distance of the slider 23 can be adjusted by adjusting the distance between the clamping block 33 and the circuit board in the placement space 101, so as to adapt to circuit boards of different specifications, thereby making the overall debugging more convenient.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A fixture for FCT testing of a circuit board, characterized in that: The invention comprises a machine platform, wherein a placement space for placing circuit boards is provided on the machine platform, wherein a plurality of movable driving seats are provided in the placement space, wherein a retractable telescopic clamping block is connected to the driving seat, wherein a driving plate is provided above the machine platform, wherein an opening opposite to the placement space is provided on the driving plate, wherein a driving cylinder is connected below the driving plate, wherein the driving cylinder is used to drive the driving plate to rise and fall, so as to drive a plurality of driving seats to synchronously move toward the circuit boards in the placement space, so that the telescopic clamping block is compressed and contracted to clamp the circuit boards, wherein a test board is provided above the placement space, wherein a lifting cylinder is connected above the test board, wherein the lifting cylinder is used to drive the test board to rise and fall, so as to make the test board contact with the circuit boards to complete the testing of the circuit boards.

2. The fixture for FCT testing of a circuit board according to claim 1, characterized in that: The driving seat includes a base, a slide rail is provided on the base, a slider is provided on the slide rail, the slider is coupled to the slide rail and can form a sliding fit between the two, and the slider is located on the side away from the telescopic clamp and decreases in height along the direction away from the driving plate to form an inclined coupling side wall.

3. A jig for FCT testing of a circuit board according to claim 2, characterized in that: The telescopic clamping block includes a fixed rod and a movable rod, a slide track is arranged inside the fixed rod, one end of the movable rod is located on the slide track and can slide along the slide track, and the other end extends outside the slide track as a connecting end, a clamping block is arranged at the connecting end, a mounting flange is arranged on the outer periphery of the fixed rod, a spring is arranged between the mounting flange and the clamping block, one end of the spring is fixed to the mounting flange, and the other end is fixed to the clamping block.

4. The fixture for FCT testing of a circuit board according to claim 2, characterized in that: A protruding push block is provided at the bottom of the driving plate, and the push block is used to couple with the coupling side wall to push the sliding block to slide along the sliding rail.

5. The fixture for FCT testing of a circuit board according to claim 1, characterized in that: The platform is provided with a guide rod arranged in a vertical direction, the driving plate is provided with a guide hole coupled with the guide rod, the guide rod passes through the guide hole, and a sliding fit between the two can be formed.

6. The fixture for FCT testing of a circuit board according to claim 2, characterized in that: The base is provided with a first mounting threaded hole extending therethrough, and the platform is provided with a second mounting threaded hole. The second mounting threaded holes are multiple and spaced apart from each other. The first mounting threaded hole can be opposite to the second mounting threaded hole, and the first mounting threaded hole and the second mounting threaded hole are fixed by bolts and nuts.

Images