High-precision pcba test fixture

Abstract

This utility model discloses a high-precision PCBA test fixture, including a worktable. An extension frame is fixedly connected to the surface of the worktable. Two hydraulic rods are fixedly connected to the upper surface of the worktable, with one end of each hydraulic rod fixedly connected to the extension frame. An upper clamp is mounted on the surface of the two hydraulic rods, and several probes are mounted on the lower surface of the upper clamp. Four telescopic rods are fixedly connected to the surface of the worktable, with a lower clamp fixedly connected to the upper end of each telescopic rod. This high-precision PCBA test fixture, through the inclusion of auxiliary devices, helps to quickly align and place the PCBA board to be tested on the surface of the lower clamp, eliminating the need for multiple local adjustments by the operator, thus increasing placement efficiency. This facilitates the operator in activating the upper clamp and probes to contact the PCBA board for testing, simplifying the use of the test fixture and improving work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of PCBA test fixture technology, specifically a high-precision PCBA test fixture. Background Technology

[0002] The PCBA test fixture was developed out of the electronics manufacturing industry's pursuit of product quality and efficiency. The test fixture integrates technologies from multiple fields, including mechanical design, electronic engineering, and materials science. Mechanical design ensures the fixture can stably hold the PCBA board and guarantee accurate probe contact; electronic engineering ensures the integrity and accuracy of signal transmission; and materials science provides suitable materials to meet the fixture's strength, insulation, and other requirements. Today, PCBA test fixtures have become an indispensable tool in electronics manufacturing, helping companies improve product quality and production efficiency.

[0003] Chinese patent CN219799533U discloses a PCBA test fixture, including a base, a support assembly, a height adjustment mechanism, and a clamping mechanism. The support assembly includes a connecting plate disposed on the base. The connecting plate has a clearance and a mounting position. The clearance extends through the connecting plate from the side facing the base to the side facing away from the base. The mounting position is located on the side of the connecting plate facing away from the base and is arranged around the periphery of the clearance. The mounting position has a bottom wall and a side wall. The bottom wall is connected to the connecting plate, and the side wall is arranged around the bottom wall. The bottom wall has a groove located on the side of the bottom wall facing away from the base. The height adjustment mechanism is connected to the base and is located on the same side of the base as the connecting plate. The clamping mechanism is connected to the height adjustment mechanism. By setting the groove on the bottom wall, the protrusions of the PCBA can be accommodated in the groove, avoiding the clamping mechanism from squeezing the PCBA and the functional units of the protrusions from being squeezed and damaged by the connection plate, thus improving the yield of the PCBA.

[0004] In the aforementioned prior art, before placing the PVBA board on the lower fixture surface and cooperating with the fixture and probe to perform the testing operation, the sides of the PVBA board need to be aligned and placed inside the groove on the lower fixture surface in order to achieve high-precision testing of the PVBA board. This situation leads to the operator needing to adjust the position of the PVBA board multiple times to get it into the groove, reducing the testing efficiency of the PVBA board. Therefore, there is an urgent need for a high-precision PCBA testing fixture to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision PCBA test fixture to solve the problem mentioned in the background art that PVBA boards need to be manually adjusted multiple times when placed into the internal groove of the lower fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-precision PCBA testing fixture, comprising a worktable, characterized in that: an extension frame is fixedly connected to the surface of the worktable; two hydraulic rods are fixedly connected to the upper surface of the worktable, one end of each hydraulic rod is fixedly connected to the extension frame; an upper clamp is mounted on the surface of the two hydraulic rods; several probes are mounted on the lower surface of the upper clamp; four telescopic rods are fixedly connected to the surface of the worktable; a lower clamp is fixedly connected to the upper end of the four telescopic rods; an auxiliary device is provided on the surface of the worktable; a material ejection device is provided on the inner wall of the worktable; and the lower clamp... A round rod is fixedly connected to the surface of the worktable. A spring is fitted on the surface of the round rod, and the two ends of the spring are fixedly connected to the worktable and the round rod, respectively. The auxiliary device includes a placement frame, which is fixedly connected to the upper surface of the worktable. A slider is slidably connected to the inner wall of the placement frame. An outer plate is fixedly connected to the side of the slider near the lower clamp. A rotating rod is rotatably connected to the surface of the outer plate. A placement plate is fixedly connected to the end of the rotating rod away from the outer plate. A limit plate is fixedly connected to the surface of the outer plate. Two guide plates are detachably installed on the surface of the placement plate. A baffle is fixedly connected to the upper surface of the placement plate, and a circular groove is formed on the surface of the baffle.

[0007] Furthermore, the inner wall of the slider is rotatably connected to a rotating wheel, and the surface of the placement rack has two limiting grooves, with the rotating wheel slidably connected to the inner wall of the limiting groove.

[0008] Furthermore, a screw is threadedly connected to the side wall of the placement rack, and a rectangular block is rotatably connected to one end of the screw near the placement rack. The rectangular block is slidably connected to the inner wall of the placement rack. A scale plate is fixedly connected to the side wall of the placement rack, and several scale grooves are formed on the surface of the scale plate. A pointer is fixedly connected to the side of the rectangular block near the scale plate.

[0009] Furthermore, the upper surface of the placement plate is provided with several rectangular grooves, and both guide plates are slidably connected to the rectangular grooves, and both guide plates are in a "V" shape.

[0010] Furthermore, the unloading device includes a multi-section rod, which is fixedly connected to the inner wall of the worktable. A push block is fixedly connected to one end of the multi-section rod, and a protective pad made of sponge is glued to the upper surface of the push block. Both the multi-section rod and the push block are slidably connected to the upper surface of the worktable. A mounting frame is fixedly connected to the inner wall of the worktable, and a rotating plate is rotatably connected to the inner wall of the mounting frame. A telescopic plate is fixedly connected to the side of the rotating plate near the multi-section rod, and the telescopic plate is rotatably connected to the arc surface of the multi-section rod.

[0011] Furthermore, both sides of the mounting frame are rotatably connected to connecting rods, which are fixedly connected to the side wall of the rotating plate. A torsion spring is sleeved on the surface of the connecting rod, and the two ends of the torsion spring are fixedly connected to the mounting frame and the connecting rod, respectively.

[0012] Furthermore, a support rod is rotatably connected to the surface of the mounting bracket, and a placement groove is formed on the surface of the rotating plate, with the support rod engaging with the placement groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model provides a high-precision PCBA test fixture. By setting an auxiliary device, it can help the PCBA board to be tested to be quickly aligned and placed on the surface of the lower fixture without the need for the operator to make multiple local adjustments, thus increasing the placement efficiency. This makes it easier for the operator to start the upper fixture and probe to contact the PCBA board for testing, which facilitates the use of the test fixture and improves work efficiency.

[0015] 2. This utility model provides a high-precision PCBA test fixture. By setting up an ejection device, it can help the PCBA board to be quickly pushed out of the lower fixture after the test on the surface of the lower fixture is completed. This eliminates the need for the operator's hands to come into contact with the PCBA board, reducing the possibility of damage to the PCBA board and thus improving the integrity of the PCBA board. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the structure of the lower clamp in this utility model;

[0018] Figure 3 This is a schematic diagram of the auxiliary device in this utility model;

[0019] Figure 4 This is a schematic diagram of the material unloading device of this utility model.

[0020] In the diagram: 1. Workbench; 2. Extension frame; 3. Hydraulic rod; 4. Upper clamp; 5. Probe; 6. Telescopic rod; 7. Lower clamp; 8. Auxiliary device; 801. Placement frame; 802. Slider; 803. Limiting groove; 804. Rotary wheel; 805. External plate; 806. Rotating rod; 807. Limiting plate; 808. Placement plate; 809. Rectangular groove; 810. Guide plate; 811. Baffle; 812. Screw; 813. Scale plate; 814. Rectangular block; 815. Pointer; 9. Unloading device; 901. Multi-section rod; 902. Push block; 903. Protective pad; 904. Mounting frame; 905. Rotating plate; 906. Telescopic plate; 907. Connecting rod; 908. Torsion spring; 909. Support rod; 910. Placement groove; 10. Round rod; 11. Spring. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a high-precision PCBA testing fixture, including a workbench 1. The workbench 1 is characterized by: an extension frame 2 fixedly connected to its surface; two hydraulic rods 3 fixedly connected to its upper surface, each with one end fixedly connected to the extension frame 2; an upper clamp 4 mounted on the surface of the two hydraulic rods 3; several probes 5 mounted on the lower surface of the upper clamp 4; four telescopic rods 6 fixedly connected to its surface; a lower clamp 7 fixedly connected to the upper end of each telescopic rod 6; an auxiliary device 8 on the surface of the workbench 1; a material ejection device 9 on the inner wall of the workbench 1; a round rod 10 fixedly connected to the lower surface of the lower clamp 7; a spring 11 sleeved on the surface of the round rod 10; and both ends of the spring 11 fixedly connected to the workbench 1 and the round rod 10, respectively.

[0023] In this embodiment of the utility model: when performing PCBA board testing, the auxiliary device 8 helps to neatly place the PCBA board on the surface of the lower clamp 7. The surface of the lower clamp 7 has grooves adapted to the PCBA board to be tested, which can ensure that the PCBA board is placed in the same position during testing. Furthermore, the operator can activate the test fixture, so that the upper clamp 4 is close to the lower clamp 7, thereby enabling the probe 5 to be accurately positioned on the test point on the PCBA board, ensuring the accuracy of the test. The combined effect of the telescopic rod 6 and the spring 11 can maintain the contact pressure between the probe and the test point on the surface of the PCBA board, thereby ensuring that it can achieve a good electrical connection. After the PCBA board test is completed, the operator can use the unloading device 9 to help remove the PCBA board from the lower clamp 7.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the auxiliary device 8 includes a placement frame 801, which is fixedly connected to the upper surface of the workbench 1. A slider 802 is slidably connected to the inner wall of the placement frame 801. An outer plate 805 is fixedly connected to the side of the slider 802 near the lower clamp 7. A rotating rod 806 is rotatably connected to the surface of the outer plate 805. A placement plate 808 is fixedly connected to the end of the rotating rod 806 away from the outer plate 805. A limit plate 807 is fixedly connected to the surface of the outer plate 805. Two guide plates 810 are detachably installed on the surface of the placement plate 808. A baffle 811 is fixedly connected to the upper surface of the placement plate 808. A circular groove is formed on the surface of the baffle 811.

[0025] Place the placement plate 808 in a horizontal position, then place the tail of the PCBA board against the baffle 811. Press and push the placement plate 808 from the arc groove of the baffle 811 to move the placement plate 808 to the appropriate position. Rotate the placement plate 808 so that the PCBA board is pressed against the inside of the lower clamp 7. Then pull the placement plate 808 outward to install the PCBA board into the lower clamp 7.

[0026] The inner wall of the slider 802 is rotatably connected to a rotating wheel 804, and the surface of the placement rack 801 is provided with two limiting grooves 803, with the rotating wheel 804 slidably connected to the inner wall of the limiting groove 803.

[0027] The rotary wheel 804 can improve the smoothness of the movement of the slider 802 on the inner wall of the placement frame 801, thereby facilitating the use of the auxiliary device 8.

[0028] A screw 812 is threadedly connected to the side wall of the placement rack 801. A rectangular block 814 is rotatably connected to one end of the screw 812 near the placement rack 801. The rectangular block 814 is slidably connected to the inner wall of the placement rack 801. A scale plate 813 is fixedly connected to the side wall of the placement rack 801. Several scale grooves are opened on the surface of the scale plate 813. A pointer 815 is fixedly connected to the side of the rectangular block 814 near the scale plate 813.

[0029] The screw 812 can adjust the position of the rectangular block 814, thereby limiting the sliding distance of the slider 802. When one side of the slider 802 abuts against the side wall of the rectangular block 814, the operator can rotate the placement plate 808 and place the PCBA board into the lower clamp 7. The pointer 815 can help the auxiliary device 8 to handle PCBA boards of different sizes. When the lower clamp 7 and the upper clamp 4 are changed according to different PCBA boards, the alignment and placement operation can be quickly achieved.

[0030] The upper surface of the placement plate 808 is provided with several rectangular grooves 809, and two guide plates 810 are slidably connected to the rectangular grooves 809. Both guide plates 810 are V-shaped.

[0031] The rectangular slot 809 allows the guide plate 810 to be placed at different positions on the placement plate 808, which can accommodate PCBA boards of different sizes, further increasing the practicality of the auxiliary device 8. The special structure of the guide plate 810 also helps the PCBA board to be placed quickly on the surface of the PCBA board.

[0032] Working principle: First, according to the width of the PCBA board, place the two guide plates 810 into the corresponding rectangular slots 809. Then, place a finger on the baffle 811, causing it to rotate towards the lower clamp 7, thus leveling the placement plate 808. The operator can then place the PCBA board to be tested onto the surface of the placement plate 808. The operator can then slide the placement plate 808 towards the lower clamp 7. The rotating wheel 804 slides on the upper surface of the worktable 1, improving the smoothness of the slider 802's movement and further ensuring that one side of the PCBA board aligns with one side of the groove inside the lower clamp 7. Meanwhile, the operator can rotate the screw 812 to adjust the position of the rectangular block 814, which can abut against the surface of the slider 802. At this time, the operator can record the position indicated on the scale plate 813 by the pointer 815. When testing PCBA boards of the same size in the future, this value distance can be directly used. Then, with the assistance of the limiting plate 807, the operator can rotate the placement plate 808 so that the side wall of the PCBA board can directly align with the side of the lower clamp 7, thereby detaching the PCBA board from the surface of the placement plate 808 to complete the installation. The installation is quick and does not require multiple position adjustments.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the unloading device 9 includes a multi-section rod 901, which is fixedly connected to the inner wall of the worktable 1. A push block 902 is fixedly connected to one end of the multi-section rod 901. A protective pad 903 made of sponge is glued to the upper surface of the push block 902. Both the multi-section rod 901 and the push block 902 are slidably connected to the upper surface of the worktable 1. A mounting frame 904 is fixedly connected to the inner wall of the worktable 1. A rotating plate 905 is rotatably connected to the inner wall of the mounting frame 904. A telescopic plate 906 is fixedly connected to the side of the rotating plate 905 near the multi-section rod 901. The telescopic plate 906 is rotatably connected to the arc surface of the multi-section rod 901.

[0034] By pressing the rotating plate 905, the multi-section rod 901 can be moved upward, thereby pushing the PCBA board inside the lower clamp 7 through the push block 902.

[0035] Both sides of the mounting bracket 904 are rotatably connected to connecting rods 907. The connecting rods 907 are fixedly connected to the side wall of the rotating plate 905. A torsion spring 908 is sleeved on the surface of the connecting rod 907. The two ends of the torsion spring 908 are fixedly connected to the mounting bracket 904 and the connecting rod 907, respectively.

[0036] The connecting rod 907, together with the torsion spring 908, helps the rotating plate 905 to reset, so that the push block 902 will not get stuck on the inner wall of the worktable 1, which facilitates the smooth use of the unloading device 9.

[0037] The surface of the mounting bracket 904 is rotatably connected to a support rod 909, and the surface of the rotating plate 905 is provided with a placement groove 910, and the support rod 909 is engaged with the placement groove 910.

[0038] When the PCBA board is being tested, the support rod 909 can be used to support the rotating plate 905 at the placement slot 910, thus limiting the rotation of the plate and preventing the PCBA board from being damaged due to accidental contact by the operator.

[0039] Working principle: After the PCBA board testing is completed, the upper clamp 4 moves upward, and at the same time the probe disengages from the PCBA board inside the lower clamp 7. At this time, the operator can disengage the support rod 909 from the inner wall of the placement groove 910, and then press the rotating plate 905. Through the telescopic plate 906, one section of the multi-section rod 901 can be moved upward, and then the push block 902 and the protective pad 903 can abut against the lower surface of the PCBA board, helping the PCBA board to disengage from the groove of the lower clamp 7. At this time, the unloading operation is completed, and the rotating plate 905 will be reset by the effect of the torsion springs 908 on both sides, making it convenient for unloading again.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-precision PCBA test fixture, comprising a worktable (1), characterized in that: An extension frame (2) is fixedly connected to the surface of the workbench (1). Two hydraulic rods (3) are fixedly connected to the upper surface of the workbench (1). One end of each hydraulic rod (3) is fixedly connected to the extension frame (2). An upper clamp (4) is installed on the surface of the two hydraulic rods (3). Several probes (5) are installed on the lower surface of the upper clamp (4). Four telescopic rods (6) are fixedly connected to the surface of the workbench (1). A lower clamp (7) is fixedly connected to the upper end of each telescopic rod (6). An auxiliary device (8) is provided on the surface of the workbench (1). A material ejection device (9) is provided on the inner wall of the workbench (1). A round rod (10) is fixedly connected to the lower surface of the lower clamp (7). A spring (11) is fitted on the surface of the round rod (10). The two ends of the spring (11) are respectively connected to the workbench (1) and the round rod (7). The rod (10) is fixedly connected. The auxiliary device (8) includes a placement frame (801). The placement frame (801) is fixedly connected to the upper surface of the workbench (1). A slider (802) is slidably connected to the inner wall of the placement frame (801). An outer plate (805) is fixedly connected to the side of the slider (802) near the lower clamp (7). A rotating rod (806) is rotatably connected to the surface of the outer plate (805). A placement plate (808) is fixedly connected to the end of the rotating rod (806) away from the outer plate (805). A limit plate (807) is fixedly connected to the surface of the outer plate (805). Two guide plates (810) are detachably installed on the surface of the placement plate (808). A baffle (811) is fixedly connected to the upper surface of the placement plate (808). A circular groove is opened on the surface of the baffle (811).

2. The high-precision PCBA test fixture according to claim 1, characterized in that: The inner wall of the slider (802) is rotatably connected to a wheel (804), and the surface of the placement rack (801) is provided with two limiting grooves (803). The wheel (804) is slidably connected to the inner wall of the limiting groove (803).

3. A high-precision PCBA test fixture according to claim 1, characterized in that: The side wall of the placement rack (801) is threaded with a screw (812), and a rectangular block (814) is rotatably connected to one end of the screw (812) near the placement rack (801). The rectangular block (814) is slidably connected to the inner wall of the placement rack (801). A scale plate (813) is fixedly connected to the side wall of the placement rack (801). The surface of the scale plate (813) is provided with several scale grooves. A pointer (815) is fixedly connected to the side of the rectangular block (814) near the scale plate (813).

4. A high-precision PCBA test fixture according to claim 1, characterized in that: The upper surface of the placement plate (808) is provided with a plurality of rectangular grooves (809), and the two guide plates (810) are slidably connected to the rectangular grooves (809), and the two guide plates (810) are both "V" shaped.

5. A high-precision PCBA test fixture according to claim 1, characterized in that: The unloading device (9) includes a multi-section rod (901), which is fixedly connected to the inner wall of the workbench (1). A push block (902) is fixedly connected to one end of the multi-section rod (901). A protective pad (903) is glued to the upper surface of the push block (902). The protective pad (903) is made of sponge. The multi-section rod (901) and the push block (902) are slidably connected to the upper surface of the workbench (1). A mounting frame (904) is fixedly connected to the inner wall of the workbench (1). A rotating plate (905) is rotatably connected to the inner wall of the mounting frame (904). A telescopic plate (906) is fixedly connected to the side of the rotating plate (905) near the multi-section rod (901). The telescopic plate (906) is rotatably connected to the arc surface of the multi-section rod (901).

6. A high-precision PCBA test fixture according to claim 5, characterized in that: The mounting bracket (904) is rotatably connected to both sides of the mounting bracket (907). The mounting bracket (907) is fixedly connected to the side wall of the rotating plate (905). A torsion spring (908) is sleeved on the surface of the mounting bracket (907). The two ends of the torsion spring (908) are fixedly connected to the mounting bracket (904) and the mounting bracket (907) respectively.

7. A high-precision PCBA test fixture according to claim 5, characterized in that: The mounting bracket (904) is rotatably connected to a support rod (909), and the rotating plate (905) has a placement groove (910) on its surface. The support rod (909) is engaged with the placement groove (910).

Images