Positioning test fixture for ICT

Abstract

The utility model discloses a positioning test fixture for ICT, which comprises a fixture main body, a test frame is fixed above the fixture main body, a cylinder is mounted at the top of the test frame, a needle plate is mounted at the output end of the cylinder, a test needle is mounted at the bottom end of the needle plate, and a test board is fixed at the top end of the fixture main body. A first bidirectional screw rod is mounted at the top of the test bench, a second bidirectional screw rod is mounted in the test bench below the first bidirectional screw rod, and two groups of first positioning clamping blocks and second movable blocks are respectively arranged at the top end of the test bench. According to the utility model, the circuit board can be quickly positioned in the center of the surface of the test board, the operation is convenient and quick, the efficiency is high, the stability and reliability are realized, the circuit board does not displace, and the accuracy of subsequent tests is improved.

Description

Technical Field

[0001] This utility model relates to the field of ICT testing technology, specifically a positioning test fixture for ICT. Background Technology

[0002] ICT testing is an automated online inspection technology mainly used to inspect the electrical performance, soldering quality, and electrical connection problems of components on circuit boards (PCBAs). It quickly locates defects by directly contacting test points on the circuit board, ensuring that products meet design requirements, and is widely used in the electronics manufacturing industry.

[0003] Chinese patent CN208043865U discloses a fixture for ICT testing, including an electrical box. Support columns are fixed around the top of the electrical box, and a shelf is fixed to the top of each support column. Pull plates are provided around the shelf, and two sets of movable rods are fixed to the side of each pull plate near the shelf. One end of each movable rod extends into the interior of the shelf and is fixed with a clamping plate. A first spring is sleeved on the outside of each movable rod, located between the shelf and the clamping plate. A partition is located directly below the shelf, between the four sets of support columns. A cylinder is installed in the center of the top of the electrical box, and a lifting plate is fixed to the top of the cylinder's piston rod. Connecting rods are fixed around the top of the lifting plate.

[0004] While the aforementioned fixture can hold circuit boards of different models, facilitating testing of different types of circuit boards, saving costs, and expanding the applicability of the fixture, it requires clamping the circuit board side by side through a pull plate, movable rod, clamping plate, and the elasticity of a first spring. This operation is relatively cumbersome and makes it difficult to quickly position the circuit board in the center. Moreover, due to the elasticity of the spring, it is difficult to ensure that the circuit board does not shift during testing, which could lead to testing errors. Therefore, improvements are urgently needed. Utility Model Content

[0005] The purpose of this invention is to provide a positioning test fixture for ICT to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning test fixture for ICT, comprising a fixture body, a test frame fixed above the fixture body, a cylinder mounted on the top of the test frame, a needle plate mounted on the output end of the cylinder, a test needle mounted on the bottom end of the needle plate, a test platform fixed at the top of the fixture body, a first bidirectional lead screw mounted on the top of the test platform, a second bidirectional lead screw mounted inside the test platform below the first bidirectional lead screw, a first motor and a second motor mounted on the outer walls on both sides of the test platform, the output ends of the first motor and the second motor being fixedly connected to the first bidirectional lead screw and the second bidirectional lead screw respectively, two sets of first positioning clamping blocks and second movable blocks being respectively provided at the top of the test platform, the bottom ends of the first positioning clamping blocks and the second movable blocks extending into the interior of the test platform and threadedly connected to the first bidirectional lead screw and the second bidirectional lead screw respectively.

[0007] Preferably, the surfaces of the first positioning clamp and the second movable block are adhered with rubber sheets, and a groove is provided at the center of the surface of the rubber sheet.

[0008] Preferably, a laser ranging probe is mounted on the surface of the first positioning clamp and the second movable block, and the plane on which the end face of the laser ranging probe is located is coplanar with the plane on which the surface of the rubber sheet is located.

[0009] Preferably, a filter box is installed at the top of the fixture body on one side of the test frame, and a filter element is installed inside the filter box.

[0010] Preferably, an exhaust fan is installed on the inner wall of the top of the test rack, and the output end of the exhaust fan is connected to the filter box through a first air duct.

[0011] Preferably, a drive rail is fixed on one side inside the test frame, and a synchronous belt group is installed inside the drive rail. A third motor is installed on the outer wall of one end of the drive rail, and the output end of the third motor is fixedly connected to the drive end of the synchronous belt group.

[0012] Preferably, a movable arm is slidably mounted on the outer wall of the drive rail, and one end of the movable arm extends into the interior of the drive rail and is fixedly connected to the timing belt assembly.

[0013] Preferably, a suction pipe is installed at the bottom end of the movable arm, and the suction pipe is connected to the input end of the induced draft fan through a second air duct.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The circuit board is placed on the test bench surface. The first and second motors are started, causing the first and second bidirectional lead screws to rotate and drive the first positioning clamp and the second movable block to simultaneously move towards the circuit board until the circuit board is pushed to the center position and clamped and fixed. The first and second bidirectional lead screws detect the distance to the circuit board through a laser ranging probe so that they stop moving when clamped. This design adopts a synchronous clamping method in both longitudinal and transverse directions, which can quickly position the circuit board in the center position on the test bench surface. The operation is convenient, fast, efficient, stable and reliable. The circuit board will not be displaced, which improves the accuracy of subsequent tests. Moreover, the rubber sheet contacts the circuit board, reducing wear on the circuit board. The cylinder drives the needle plate to move down, and the needle plate drives the test needle down until it contacts the test point on the circuit board, transmitting the signal back to the control panel to achieve the purpose of ICT testing of the circuit board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the test bench of this utility model;

[0018] Figure 3 This is a top view of the test stand structure of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the first positioning clamping block of this utility model;

[0020] Figure 5 This is an enlarged schematic diagram of the drive guide rail structure of this utility model.

[0021] In the diagram: 1. Fixture body; 2. Test platform; 3. Test frame; 4. Filter box; 5. First air duct; 6. Exhaust fan; 7. Second air duct; 8. Cylinder; 9. Needle plate; 10. Test needle; 11. Drive guide rail; 12. First bidirectional lead screw; 13. First positioning clamp; 14. First motor; 15. Second bidirectional lead screw; 16. Second movable block; 17. Second motor; 18. Rubber sheet; 19. Laser rangefinder probe; 20. Third motor; 21. Synchronous belt assembly; 22. Movable arm; 23. Suction pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figure 1-5 An embodiment of this utility model is provided: a positioning test fixture for ICT, including a fixture body 1, a test frame 3 fixed above the fixture body 1, a cylinder 8 installed on the top of the test frame 3, a needle plate 9 installed at the output end of the cylinder 8, a test needle 10 installed at the bottom end of the needle plate 9, and a test platform 2 fixed at the top of the fixture body 1.

[0025] Specifically, cylinder 8 drives needle plate 9 to move down, and needle plate 9 drives test needle 10 to move down until it contacts the test point on the circuit board, transmitting the signal back to the control panel to achieve the purpose of ICT testing on the circuit board.

[0026] A first bidirectional lead screw 12 is installed on the top of the test bench 2, and a second bidirectional lead screw 15 is installed inside the test bench 2 below the first bidirectional lead screw 12. A first motor 14 and a second motor 17 are respectively installed on the outer walls on both sides of the test bench 2, and the output ends of the first motor 14 and the second motor 17 are respectively fixedly connected to the first bidirectional lead screw 12 and the second bidirectional lead screw 15. Two sets of first positioning clamps 13 and second movable blocks 16 are respectively provided on the top of the test bench 2, and the bottom ends of the first positioning clamps 13 and the second movable blocks 16 extend into the interior of the test bench 2 and are respectively threadedly connected to the first bidirectional lead screw 12 and the second bidirectional lead screw 15.

[0027] Specifically, the circuit board is placed on the surface of the test bench 2. The first motor 14 and the second motor 17 are started by operating the external control panel, so that the first bidirectional lead screw 12 and the second bidirectional lead screw 15 rotate and drive the first positioning clamp 13 and the second movable block 16 to move towards the circuit board at the same time until the circuit board is pushed to the center position and clamped and fixed. The first bidirectional lead screw 12 and the second bidirectional lead screw 15 detect the distance to the circuit board through the laser ranging probe 19 so that the movement stops when the circuit board is clamped. This design adopts a synchronous clamping method in both the longitudinal and transverse directions, which can quickly position the circuit board in the center position on the surface of the test bench 2. The operation is convenient, fast, efficient and stable. The circuit board will not be displaced, which improves the accuracy of subsequent tests.

[0028] A rubber sheet 18 is adhered to the surface of the first positioning clamp 13 and the second movable block 16, and a groove is provided at the center of the surface of the rubber sheet 18.

[0029] The rubber sheet 18 contacts the circuit board, reducing wear on the circuit board;

[0030] A laser ranging probe 19 is mounted on the surface of the first positioning clamp 13 and the second movable block 16, and the plane where the end face of the laser ranging probe 19 is located is coplanar with the plane where the surface of the rubber sheet 18 is located.

[0031] A filter box 4 is installed on the top of the fixture body 1 on one side of the test frame 3, and a filter element is installed inside the filter box 4; an exhaust fan 6 is installed on the inner wall of the top of the test frame 3, and the output end of the exhaust fan 6 is connected to the filter box 4 through the first air duct 5.

[0032] A drive rail 11 is fixed on one side inside the test frame 3, and a synchronous belt group 21 is installed inside the drive rail 11. A third motor 20 is installed on the outer wall of one end of the drive rail 11, and the output end of the third motor 20 is fixedly connected to the drive end of the synchronous belt group 21. A movable arm 22 is slidably installed on the outer wall of the drive rail 11, and one end of the movable arm 22 extends into the interior of the drive rail 11 and is fixedly connected to the synchronous belt group 21. A dust suction pipe 23 is installed at the bottom end of the movable arm 22, and the dust suction pipe 23 is connected to the input end of the induced draft fan 6 through the second air pipe 7.

[0033] The third motor 20 is started to drive the synchronous belt group 21 to rotate, causing the movable arm 22 to move the suction pipe 23 along the drive guide rail 11. The suction pipe 23 passes over the surface of the circuit board, and the blower 6 operates through the second air duct 7 to suck away the dust on the surface of the circuit board through the suction pipe 23. The first air duct 5 guides the dust into the filter box 4, and the filter element inside the filter box 4 collects the dust, which facilitates the cleaning of the circuit board and reduces the interference of dust on subsequent tests. After cleaning, the third motor 20 is started in reverse to drive the synchronous belt group 21 to rotate in the opposite direction, causing the movable arm 22 to move the suction pipe 23 back to its original position. The movable arm 22 is misaligned with the needle plate 9, and the drive guide rail 11 is misaligned with the needle plate 9, so it will not interfere with the descent of the needle plate 9.

[0034] In this embodiment, the circuit board is first placed on the surface of the test bench 2. Then, by operating the external control panel, the first motor 14 and the second motor 17 are activated, causing the first bidirectional lead screw 12 and the second bidirectional lead screw 15 to rotate and simultaneously drive the first positioning clamp 13 and the second movable block 16 to move towards the circuit board until it is pushed to the center position and clamped and fixed. The first bidirectional lead screw 12 and the second bidirectional lead screw 15 detect the distance to the circuit board using a laser ranging probe 19, stopping their movement when clamped. This design, employing synchronous clamping in both longitudinal and transverse directions, can quickly position the circuit board in the center of the test bench 2 surface. The operation is convenient, fast, efficient, stable, and reliable, preventing displacement of the circuit board and improving the accuracy of subsequent tests. The rubber sheet 18 contacts the circuit board, reducing wear on the circuit board. Then, the third motor 20 is started to drive the synchronous belt group 21 to rotate, causing the movable arm 22 to move the suction pipe 23 along the drive guide rail 11. The suction pipe 23 passes over the surface of the circuit board, and the exhaust fan 6 operates through the second air duct 7 to suck away the dust on the surface of the circuit board through the suction pipe 23. The first air duct 5 guides the dust into the filter box 4, and the filter element inside the filter box 4 collects the dust, thus facilitating the cleaning of the circuit board and reducing the interference of dust on subsequent tests. Next, the cylinder 8 drives the needle plate 9 to move down, and the needle plate 9 drives the test needle 10 to move down until it contacts the test point on the circuit board, transmitting the signal back to the control panel to achieve the purpose of ICT testing of the circuit board.

[0035] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A positioning test fixture for ICT, comprising a fixture body (1), a test frame (3) fixed above the fixture body (1), and a cylinder (8) mounted on the top of the test frame (3), a needle plate (9) mounted on the output end of the cylinder (8), and a test needle (10) mounted on the bottom end of the needle plate (9), characterized in that, The top of the fixture body (1) is fixed with a test platform (2). A first bidirectional lead screw (12) is installed on the top of the test platform (2), and a second bidirectional lead screw (15) is installed inside the test platform (2) below the first bidirectional lead screw (12). A first motor (14) and a second motor (17) are respectively installed on the outer walls on both sides of the test platform (2), and the output ends of the first motor (14) and the second motor (17) are respectively fixedly connected to the first bidirectional lead screw (12) and the second bidirectional lead screw (15). Two sets of first positioning clamps (13) and second movable blocks (16) are respectively provided on the top of the test platform (2), and the bottom ends of the first positioning clamps (13) and the second movable blocks (16) extend into the interior of the test platform (2) and are threadedly connected to the first bidirectional lead screw (12) and the second bidirectional lead screw (15) respectively.

2. The positioning test fixture for ICT according to claim 1, characterized in that: The first positioning clamp (13) and the second movable block (16) have rubber sheets (18) glued to their surfaces, and a groove is provided at the center of the surface of the rubber sheet (18).

3. The positioning test fixture for ICT of claim 1, wherein: A laser ranging probe (19) is mounted on the surface of the first positioning clamp (13) and the second movable block (16), and the plane on which the end face of the laser ranging probe (19) is located is coplanar with the plane on which the surface of the rubber sheet (18) is located.

4. The positioning test fixture for ICT of claim 1, wherein: A filter box (4) is installed on the top of the fixture body (1) on one side of the test frame (3), and a filter element is installed inside the filter box (4).

5. A positioning test fixture for ICT according to claim 4, characterized in that: A blower (6) is installed on the inner wall of the top of the test frame (3), and the output end of the blower (6) is connected to the filter box (4) through the first air duct (5).

6. The positioning test fixture for ICT of claim 1, wherein: A drive rail (11) is fixed on one side inside the test frame (3), and a synchronous belt group (21) is installed inside the drive rail (11). A third motor (20) is installed on the outer wall of one end of the drive rail (11), and the output end of the third motor (20) is fixedly connected to the drive end of the synchronous belt group (21).

7. A positioning test fixture for ICT according to claim 6, characterized in that: A movable arm (22) is slidably mounted on the outer wall of the drive rail (11), and one end of the movable arm (22) extends into the interior of the drive rail (11) and is fixedly connected to the synchronous belt group (21).

8. A positioning test fixture for ICT according to claim 7, characterized in that: The bottom end of the movable arm (22) is equipped with a suction pipe (23), and the suction pipe (23) is connected to the input end of the induced draft fan (6) through the second air pipe (7).

Images