Circuit board detection device

Abstract

The invention discloses a circuit board detection device, and belongs to the field of circuit board production equipment, the circuit board detection device comprises a rack and a base fixed on the rack, and the base is provided with a detection position and a material receiving and releasing position; the bottom of the rotary table is rotationally connected to the base; a circuit board clamp which is used for clamping a circuit board and can rotate along with the rotary table is fixed on the rotary table; the circuit board clamp comprises a main body with a mounting hole in the middle; a lifting frame is arranged in the mounting hole in a sliding manner, and a plurality of clamping pieces with torsion are arranged on the lifting frame; the driving parts are in one-to-one correspondence with the clamping parts, the driving parts are fixed to the hole wall of the mounting hole, when the clamping parts move upwards to the circuit board releasing position, the driving parts are crossed, the upper ends of the clamping parts are opened outwards, and when the clamping parts move downwards to the clamping position, the upper ends of the clamping parts are overturned inwards to be in a vertical state and clamp the circuit board through limiting of the driving parts; the problems that in the prior art, circuit boards with small sizes are accurately positioned, placed and collected are not accurate are solved.

Description

Technical Field

[0001] This invention belongs to the field of circuit board manufacturing equipment, and particularly relates to a circuit board testing device. Background Technology

[0002] Throughout the PCB manufacturing process, various tests are conducted on the PCB. Among them, flying probe testing and universal grid (bed of pins) testing are key steps to ensure the electrical performance of the PCB. Their importance is self-evident. For small PCBs (e.g., less than 5cm×5cm), the PCBs are inconvenient to handle due to their small size. When positioning the PCB, the positioning holes are small and need to be strictly aligned with the positioning pins for accurate positioning. In addition, because the PCBs are small and lightweight, and the positioning pins and positioning holes are generally clearance fit, they are prone to moving, warping, or rotating on the flying probe testing platform due to force. This can cause the probes to fail to accurately contact the tiny test points, resulting in test failure or even breaking the probes or scratching the board.

[0003] Therefore, further improvements are still needed for bed-of-needle or flying probe testing on small-sized circuit boards. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit board detection device to solve the problem of positioning small-sized circuit boards in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a circuit board testing device, comprising: A frame and a base fixed on the frame, wherein a detection position and a material receiving and discharging position are provided on the base, and a circuit board detection mechanism is provided on the detection position and fixed on the base; The turntable, with its bottom rotatably connected to the base, also includes: A circuit board clamp, fixed to a turntable, is used to hold circuit boards and can move between a detection position and a material receiving / discharging position as the turntable rotates; the circuit board clamp includes: a) The main body is fixed on the turntable and has a mounting hole in the middle; b) A lifting frame, which is slidably installed within the mounting hole; c) Multiple clamping components are evenly distributed in a circle on the lifting frame, and the clamping components are connected to the edge of the lifting frame through a rotating shaft. A reset torsion spring is provided at the rotating shaft of the clamping component, and the reset torsion spring has a torque to open the clamping component outward. d) Multiple driving components, each corresponding to a multiple clamping component. The driving component is fixed on the wall of the mounting hole. When the clamping component moves upward to the position of releasing the circuit board, it passes over the driving component and the upper end of the clamping component opens outward under the action of the reset torsion spring. When the clamping component moves downward to the clamping position, the limit of the driving component causes the upper end of the clamping component to flip inward to a vertical state and clamp the circuit board. e) A first drive assembly for driving the lifting frame to move up and down along the mounting hole.

[0006] As a further description of the above technical solution: the clamping member is a clamping plate, the clamping plate is internally cavityd, and a limiting component is provided in the cavity. The limiting component is used to limit the circuit board to be tested above the lifting frame. The limiting component includes a limiting block that slides along the thickness direction of the clamping plate. A trigger block is fixed to the end of the limiting block facing away from the circuit board. The clamping plate has a front sliding hole and a rear sliding hole. The limiting block corresponds to the front sliding hole, and the trigger block corresponds to the rear sliding hole. A spring is provided in the cavity. The spring is located between the end of the trigger block facing the circuit board and the cavity. Under the action of the spring, the limiting block and the trigger block have a tendency to move away from the circuit board. The trigger block corresponds to the driving member.

[0007] As a further description of the above technical solution: the lower edge of the front end of the limiting block is set as a downward inclined surface.

[0008] As a further description of the above technical solution: the limiting block is provided with a rubber coating.

[0009] As a further description of the above technical solution: the lifting frame is rectangular, with the middle of its four sides set as the mounting position. The mounting position has a mounting notch, and the bottom of the mounting notch is provided with a mounting arm. The mounting arm is located below the driving component. The clamping component is rotatably mounted on the mounting arm. A lifting plate is provided in the mounting notch, located on the side of the clamping component facing the circuit board. The lifting plate is slidably mounted up and down in the mounting notch. A second driving component is provided between the lifting plate and the mounting arm. The second driving component is used to cooperate with the driving component to drive the lifting plate to move. When the lifting plate is at its lowest position, the upper edge of the lifting plate is flush with the upper surface of the lifting frame.

[0010] As a further description of the above technical solution: the second drive assembly includes a limiting shaft and a drive arm. One end of the drive arm is rotatably mounted on the lifting plate, and the other end is a free end located below the drive member. The drive arm has an oblong hole along its rotation axis. The limiting shaft passes through the oblong hole and the two can slide relative to each other. The limiting shaft is fixed in the mounting notch.

[0011] As a further description of the above technical solution: the first drive assembly includes a drive rail fixed on the base and arranged circumferentially around the turntable, and a drive frame arranged on the circuit board fixture. The drive frame is used to drive the lifting frame to slide up and down. The drive frame is slidably sleeved on the main body of the circuit board fixture. The drive frame and the lifting frame are connected by a connecting rod. An adjusting rod is provided on the drive frame, and the adjusting rod is adapted to the drive rail.

[0012] As a further description of the above technical solution: the drive track includes a first arc-shaped track corresponding to the material receiving and placing position and a second arc-shaped track corresponding to the detection position. The first arc-shaped track and the second arc-shaped track are connected end to end and smoothly transition. The distance between the plane of the first arc-shaped track and the upper surface of the base is greater than the distance between the plane of the second arc-shaped track and the upper surface of the base. The height difference between the two is the height difference of the sliding of the lifting frame.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) When testing the circuit board, it is not necessary to install the circuit board precisely. Simply place the circuit board on the lifting frame. As the turntable moves, the circuit board can be automatically and accurately positioned, and the positioning hole and positioning pin can be accurately positioned. This makes the testing of smaller circuit boards more convenient and faster, greatly improves the testing efficiency, and reduces the damage to the circuit board or testing pin caused by misalignment during the testing process.

[0014] (2) The limiting block set in the clamping plate can effectively limit the position of the circuit board and prevent the circuit board from shaking due to the shift of the center of gravity of the circuit board during the rotation of the turntable. The push of the four clamping plates on the circuit board enables it to slowly move to the center position of the lifting frame, so that it corresponds more accurately with the positioning pin and makes up for the slight misalignment caused by the gap between the positioning pin and the positioning hole.

[0015] (3) After the circuit board is placed on the lifting frame between the clamping plates, when the lifting frame moves downward, the circuit board moves on the lifting plate under the drive of the clamping plate. Because the lifting plate is set on the edge of the lifting frame and has a small contact area with the circuit board, it avoids the wear of the lower surface coating of the circuit board by the large contact area when the circuit board moves directly on the upper surface of the lifting frame. At the same time, after the test is completed, the movement of the lifting plate can further lift the circuit board, making it convenient to recycle the circuit board after the test is completed. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3This is a three-dimensional structural diagram of the circuit board clamp of the present invention, wherein the main body of the clamp is in cross-sectional view; Figure 4 This is a cross-sectional view of the circuit board fixture of the present invention; Figure 5 This is a three-dimensional structural diagram of another state of the circuit board clamp of the present invention; Figure 6 This is a cross-sectional view of the circuit board clamp of the present invention in another state; Figure 7 This is a schematic diagram of the three-dimensional structure of the circuit board clamp body of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the clamping plate of the present invention; Figure 9 This is a three-dimensional structural diagram of the clamping plate of the present invention from another angle; Figure 10 This is a schematic diagram of the three-dimensional structure of the lifting frame of the present invention; Figure 11 This is a three-dimensional structural diagram of the mounting arm of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the drive track of the present invention.

[0017] Legend: 100, Circuit board; 200, Circuit board inspection mechanism; 201, Connecting frame; 2, Frame; 3, Base; 4, Turntable; 41, Material receiving / placing position; 42, Inspection position; 5, Circuit board clamp; 51, Main body; 511, Driving component; 5111, Limiting side; 512, Slide rail; 52, Lifting frame; 521, Mounting notch; 53, Clamping plate; 531, Cavity; 532, Rotating shaft; 54, Positioning pin; 55, Mounting arm; 5 6. Mounting hole; 57. Support flange; 58. Guide rod; 59. Mounting base; 6. First drive assembly; 61. Drive rail; 611. First arc-shaped rail; 612. Second arc-shaped rail; 62. Drive frame; 63. Adjusting rod; 64. Connecting rod; 71. Limiting block; 711. Inclined surface; 72. Front sliding hole; 73. Rear sliding hole; 74. Spring; 75. Trigger block; 8. Lifting plate; 91. Limiting shaft; 92. Drive arm; 93. Waist-shaped hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-12 The present invention provides a technical solution for a circuit board testing device: A circuit board testing device includes a frame 2, a base 3, and a turntable 4. The base 3 is fixedly disposed in the middle of the frame 2 and is a horizontally arranged steel plate. The bottom of the turntable 4 is fixed to the center of the base 3. Multiple circuit board clamps 5 are evenly arranged on the turntable 4 along its circumference. In this embodiment, preferably, four pairs of circuit board clamps 5 are provided, with two pairs forming a single pair. Within the limited space of the turntable, two circuit boards 100 are tested simultaneously in the same testing area. Four pairs of circuit board clamps 5 are evenly spaced around their circumference. A detection position 42 and a material receiving / discharging position 41 are provided on the base 3. The material receiving / discharging position 41 is located in front of the base 3 and corresponds to one pair of circuit board clamps 5. The detection position 42 corresponds to three pairs of circuit board clamps 5. A circuit board detection mechanism 200 is provided on the base 3, corresponding one-to-one with the circuit board clamps 5 located at the detection positions 42. The circuit board detection mechanism 200 is used to detect the circuit boards 100 to be tested mounted on the circuit board clamps 5. The circuit board detection mechanism 200 includes a connecting frame 201, one end of which is fixed to the base 3. A detection section is provided at the end of the connecting frame 201 away from the base 3, and the detection section is equipped with test probes. Different test probes are provided on the detection sections of the three pairs of circuit board detection mechanisms 200 corresponding to the detection positions 42, used for detecting different positions of the circuit board 100. By reducing the density of the test probes, accurate detection of the circuit board 100 is ensured.

[0020] The circuit board fixture 5 is equipped with a circuit board positioning mechanism, which is used to accurately position the circuit board. This ensures that after the circuit board fixture 5 positions the circuit board 100 to be tested, it moves from the material receiving position 41 to the testing position 42, and the circuit board 100 is accurately aligned with the test probe. The circuit board fixture 5 includes a main body 51, which is fixed to the turntable 4 by bolts. A mounting hole 56 is provided in the middle of the main body 51, and the circuit board is installed in the mounting hole 56. The positioning mechanism includes a lifting frame 52, a clamping component, a positioning pin 54, and a first drive assembly 6. The lifting frame 52 is slidably disposed in the mounting hole 56. A support flange 57 is provided at the bottom of the mounting hole 56. Guide holes are provided at the four corners of the lifting frame 52, and guide rods 58 are provided on the support flange 57. The guide holes are adapted to the guide rods 58. A mounting seat 59 is provided in the mounting hole 56, and the positioning pin 54 is fixed to the mounting seat 59.

[0021] The first drive assembly 6 is used to drive the lifting frame 52 to slide up and down along the mounting hole 56. The first drive assembly 6 includes a drive rail 61 arranged circumferentially around the turntable 4 and a drive frame 62 set on the fixture. The drive frame 62 is used to drive the lifting frame 52 to slide up and down. The drive frame 62 is slidably sleeved on the fixture. The drive frame 62 and the lifting frame 52 are connected by a connecting rod 64. The connecting rod 64 and the lifting frame 52 are located in the same plane. An adjusting rod 63 is provided on the drive frame 62, and the adjusting rod 63 is adapted to the drive rail 61. The drive rail 61 includes a first arc-shaped rail 611 corresponding to the material receiving and placing position 41 and a second arc-shaped rail 612 corresponding to the detection position 42. The first arc-shaped rail 611 and the second arc-shaped rail 612 are connected end to end and smoothly transition. The distance between the plane of the first arc-shaped rail 611 and the upper surface of the base 3 is greater than the distance between the plane of the second arc-shaped rail 612 and the upper surface of the base 3. The height difference between the two is the height difference of the sliding of the lifting frame 52. The first arc track 611 and the second arc track 612 are connected sequentially with a smooth transition. After the first arc track 611 and the second arc track 612 are connected, they form a circular projection on the upper surface of the base 3.

[0022] As the turntable 4 rotates, it drives the fixture body 51 and the drive frame 62 to rotate together, causing the adjusting rod 63 to slide within the drive track 61. When the adjusting rod 63 is directly below the circuit board detection mechanism 200 at the detection position 42, the adjusting rod 63 is located within the second arc-shaped track 612, and the lifting frame 52 slides to its lowest position. When the adjusting rod 63 is located at the material receiving and placing position 41, the adjusting rod 63 is located within the first arc-shaped track 611, and the lifting frame 52 slides to its highest position.

[0023] The four sides of the lifting frame 52 are configured with mounting positions at their center. Each mounting position has a mounting notch 521, and a mounting arm 55 is located at the bottom of the notch 521. A clamping plate 53 is used as the clamping element, rotatably positioned above the mounting arm 55. The rotation axis 532 of the clamping plate 53 is parallel to the length direction of the corresponding mounting frame side. A return torsion spring (not shown in the figure) is located at the rotation axis 532 of the clamping plate 53. Under the action of the return torsion spring, the clamping plate 53 tends to rotate towards the geometric center away from the mounting frame. A driving component 511 corresponding to the clamping plate 53 is provided on the main body 51. The driving component 511 is located behind the mounting frame and is fixedly mounted on the main body 51 of the circuit board clamp 5. The driving component 511 has a vertical side corresponding to the side of the clamping plate 53 away from the circuit board 100 and a limiting side 5111 connected to the upper part of the vertical side. The limiting side 5111 gradually slopes upwards and outwards. When the lifting frame 52 is at its highest position, under the action of the reset torsion spring, the clamping plate 53 rotates until its side away from the circuit board 100 abuts against the limiting side 5111 of the drive member 511, thus preventing further rotation. Since the upper part of the limiting side 5111 is inclined, the upper end of the clamping plate 53 is tilted outward at this time, so that the circuit board 100 is located between the four open clamping plates 53, which facilitates the removal of the circuit board 100 and the subsequent placement of the circuit board 100 between the clamping plates 53. The inclined arrangement of the clamping plates 53 also provides pre-limiting for the placed circuit board 100. When the lifting frame 52 is at its lowest position, under the action of the drive member 511, the clamping plate 53 rotates to a vertical position while in contact with the vertical part of the limiting side 5111 of the drive member 511, and the four clamping plates 53 clamp and limit the circuit board 100.

[0024] The clamping plate 53 has an internal cavity 531, within which a limiting component is installed. This limiting component secures the circuit board 100 to be inspected against the lifting frame 52. The limiting component includes a limiting block 71 that slides along the thickness direction of the clamping plate 53. The limiting block 71 has a rubber coating to reduce wear on the sides of the circuit board 100. The lower edge of the limiting block 71 facing the circuit board 100 is a downwardly sloping surface 711. The limiting block 71 is positioned away from the circuit board. A trigger block 75 is provided at the end of the device. A front sliding hole 72 and a rear sliding hole 73 are provided on the clamping plate 53. A limiting block 71 corresponds to the front sliding hole 72, and the trigger block 75 corresponds to the rear sliding hole 73. A spring 74 is provided inside the cavity 531, located between the end of the trigger block 75 facing the circuit board 100 and the cavity 531. Under the action of the spring 74, the limiting block 71 and the trigger block 75 tend to move away from the circuit board 100. The trigger block 75 corresponds to the driving member 511. When the lifting frame 52 is at its highest position, the limiting block 71 moves into the cavity 531 under the action of the spring 74. When the lifting frame 52 is at its lowest position, the trigger block 75 is squeezed into the cavity 531 by the rear sliding hole 73 under the action of the drive component 511, the spring 74 is further compressed, and at the same time the limiting block 71 slides out from the front sliding hole 72. The lower surface of the limiting block 71 limits the circuit board 100 to prevent the edge of the circuit board 100 from lifting.

[0025] A mounting arm 55 is provided at the bottom of the mounting notch 521, and the mounting arm 55 is located below the drive component 511. A lifting plate 8 is provided inside the mounting notch 521, and the circuit board 100 is supported by the lifting plate 8 during use. The lifting plate 8 is slidably disposed within the mounting notch 521. A slide rail 512 is provided at the mounting notch 521, and the lifting plate 8 slides along the slide rail 512. A second drive assembly is provided between the lifting plate 8 and the mounting arm 55. The second drive assembly is used to drive the lifting plate 8 to move. The second drive assembly includes a limiting shaft 91 and a drive arm 92. The drive arm 92 is approximately L-shaped. One end of the drive arm 92 is rotatably disposed on the lifting plate 8, and the other end is a free end located below the drive component 511. The drive arm 92 has an oblong hole 93 along its rotation axis, and the limiting shaft 91 passes through the oblong hole 93 and is fixed within the mounting notch 521. The waist-shaped hole 93 is provided on the horizontal arm of the L-shaped drive arm 92, and the vertical arm is used to cooperate with the drive component 511. When the lifting plate 8 is at the lowest position, the upper edge of the lifting plate 8 is flush with the upper surface of the lifting frame 52.

[0026] When the lifting frame 52 is at its lowest position, the lifting plate 8 slides to its lowest point under gravity. With the limiting shaft 91 acting as a lever fulcrum, the other end of the drive arm 92 tilts upward and extends beyond the upper surface of the mounting arm 55. As the lifting frame 52 slides from its lowest to its highest position, it moves the lifting plate 8 upward together. The other end of the drive arm 92 contacts the drive component 511. At this time, the limiting block 71 moves into the cavity 531 of the clamping plate 53, releasing the clamp on the circuit board 100. Simultaneously, the clamping plate 53 begins to rotate, opening its opening for easy removal and placement of the circuit board 100. As the lifting frame 52 continues to move, the drive component 511 drives the drive arm 92 to slide along the limiting shaft 91 and rotate along its rotational connection point with the lifting plate 8. Through leverage, the lifting plate 8 slides upward, thereby pushing the circuit board 100 mounted above it upward to facilitate the removal of the tested circuit board 100 and the placement of a new circuit board 100 to be tested.

[0027] Working principle: When inspecting the circuit board 100, for smaller circuit boards 100, it is necessary to manually or by using a suction cup to place the circuit board 100 on the fixture. Since the positioning hole diameter of the circuit board 100 is small, it is not possible to accurately and quickly position it manually or by using a robotic arm with a suction cup. When using this device, the workstation first places the circuit board 100 directly between the four clamping plates 53 on the lifting frame 52 of the material receiving and placing position 41 of the circular table.

[0028] like Figure 3 , 4 As shown, before placement, the circuit board clamp 5 located at the material receiving and placing position 41 is in the following state: the lifting frame 52 is in the highest position under the action of the drive rail 61, the clamping plate 53 rotates to the tilted state under the action of the reset torsion spring and the drive component 511 to form an opening to facilitate the placement of the circuit board 100, the limiting block 71 in the clamping plate 53 is located in the cavity 531 under the action of the spring 74, and the lifting plate 8 rises to the highest state.

[0029] In this embodiment of the application, the material receiving and placing position 41 is provided with two circuit board clamps 5. Therefore, after placing two circuit boards 100 on the lifting frame 52, the edge of the circuit board 100 is also located on the lifting plate 8. The circuit board 100 is located between four clamping plates 53, but it is not in a completely centered state at this time. That is to say, workers do not need to spend time and effort to place it accurately.

[0030] Subsequently, by starting the turntable 4 to rotate (in this application, it needs to rotate 90 degrees), the next pair of circuit board clamps 5 rotates from the detection position 42 to the material receiving position 41, thereby rotating the previous pair of circuit board clamps 5 to the detection position 42. Simultaneously, the turntable 4 drives the adjusting rod 63 to move along the first arc-shaped track 611 to the second arc-shaped track 612. During this process, the vertical movement of the adjusting rod 63 drives the drive frame 62 to move. The drive frame 62 drives the lifting frame 52 to slide towards the mounting hole 56. During this sliding process, the side of the clamping plate 53 away from the circuit board 100 rotates under the action of the drive component 511, rotating from an inclined state to a vertical state. The simultaneous rotation of the four clamping plates 53 causes the circuit board 100 to make slight movements. When the clamping plates 53 rotate to a vertical state, the circuit board 100 is completely centered on the lifting frame 52, thus ensuring accurate correspondence between the positioning hole and the positioning pin 54.

[0031] After the clamping plate 53 rotates to a vertical position, as the lifting frame 52 continues to slide, the lifting plate 8 slides under the circuit board 100 and its own weight until the circuit board 100 contacts the upper surface of the lifting frame 52. Then, the end of the drive arm 92 that was in contact with the drive member 511 disengages from the bottom of the drive member 511. Subsequently, the drive member 511 contacts the trigger block 75 and drives the trigger block 75 to slide, causing the limiting block 71 to slide out of the front sliding hole 72. During the sliding process of the limiting block 71, the inclined surface of the limiting block 71... 711 first contacts the edge of the circuit board 100. As it continues to slide, the lower surface of the limiting block 71 contacts the upper surface of the edge of the circuit board 100. The limiting block 71 presses the circuit board 100 onto the lifting frame 52. During this process, when the circuit board 100 moves to the position defined by the four clamping plates 53, the positioning hole on the circuit board 100 corresponds to the positioning pin 54. As the lifting frame 52 moves downward, the positioning hole is completely fitted onto the positioning pin 54. The above process completes the positioning of the circuit board 100. Figure 5 , 6 As shown, when the circuit board 100 is in detection position 42, the test probes correspond one-to-one with the test points on the circuit board 100, thereby achieving accurate detection.

[0032] Conversely, as the turntable 4 rotates from the detection position 42 to the material receiving position 41, the drive frame 62 of the circuit board clamp 5 moves, causing the lifting frame 52 to move. This causes the limiting block 71 in the clamping plate 53 to slide into the cavity 531, and the limiting block 71 to disengage from the limiting position on the circuit board 100. Then, the lifting plate 8 pushes the circuit board 100 upward relative to the lifting frame 52, causing the positioning hole of the circuit board 100 to disengage from the limiting position of the positioning pin 54. Finally, the clamping plate 53 rotates to no longer clamp or limit the circuit board 100, forming an open opening, which facilitates workers to quickly remove the parts and install the next circuit board 100 to be tested.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention within the scope of the technology disclosed in the present invention, and all such substitutions or changes should be covered within the scope of protection of the present invention.

Claims

1. A circuit board testing device, comprising: A frame (2) and a base (3) fixed on the frame (2), wherein a detection position (42) and a material receiving and discharging position (41) are provided on the base (3), and a circuit board detection mechanism (200) fixed on the base (3) is provided on the detection position (42). The turntable (4) is rotatably connected to the base (3) at its bottom; Its characteristic is that it further includes: A circuit board clamp (5) is fixed on a turntable (4) to hold a circuit board (100) and can move between the detection position (42) and the material receiving position (41) as the turntable (4) rotates; the circuit board clamp includes: a) The main body (51) is fixed on the turntable (4) and has a mounting hole (56) in the middle. b) The lifting frame (52) is slidably disposed within the mounting hole (56); c) Multiple clamping members are evenly distributed in a circle on the lifting frame (52), and the clamping members are connected to the side of the lifting frame (52) via a rotating shaft (532). A reset torsion spring is provided at the rotating shaft (532) of the clamping member, and the reset torsion spring has a torque that opens the clamping member outward. d) Multiple driving elements (511) correspond one-to-one with multiple clamping elements. The driving elements are fixed on the wall of the mounting hole (56). When the clamping element moves upward to the position of the release circuit board (100), it passes over the driving element and the upper end of the clamping element opens outward under the action of the reset torsion spring. When the clamping element moves downward to the clamping position, the limit of the driving element causes the upper end of the clamping element to flip inward to a vertical state and clamp the circuit board (100). e) A first drive assembly (6) is used to drive the lifting frame (52) to move up and down along the mounting hole (56).

2. The circuit board testing device according to claim 1, characterized in that: The clamping component is a clamping plate (53), and the interior of the clamping plate (53) is configured as a cavity (531). A limiting component is provided in the cavity (531). The limiting component is used to limit the circuit board (100) to be tested above the lifting frame (52). The limiting component includes a limiting block (71) that slides along the thickness direction of the clamping plate (53). A trigger block (75) is fixed to the end of the limiting block (71) facing away from the circuit board (100). The clamping plate (53) is provided with a front sliding hole (72) and a rear sliding hole. (73) The limiting block (71) corresponds to the front sliding hole (72), the trigger block (75) corresponds to the rear sliding hole (73), and a spring (74) is provided in the cavity (531). The spring (74) is located between the end of the trigger block (75) facing the circuit board (100) and the cavity (531). Under the action of the spring (74), the limiting block (71) and the trigger block (75) have a tendency to move away from the circuit board (100). The trigger block (75) corresponds to the driving member (511).

3. The circuit board testing device according to claim 2, characterized in that: The lower edge of the front end of the limiting block (71) is set as a downward inclined surface (711).

4. The circuit board testing device according to claim 2, characterized in that: The limiting block (71) is provided with a rubber coating.

5. The circuit board testing device according to claim 1, characterized in that: The lifting frame (52) is rectangular, with the middle of its four sides set as the mounting position. The mounting position has a mounting notch (521). The bottom of the mounting notch (521) is provided with a mounting arm (55). The mounting arm (55) is located below the drive member (511). The clamping member is rotatably mounted on the mounting arm (55). The mounting notch (521) is provided with a lifting plate (8) located on the side of the clamping member facing the circuit board (100). The lifting plate (8) is slidably mounted in the mounting notch (521). A second drive assembly is provided between the lifting plate (8) and the mounting arm (55). The second drive assembly is used to cooperate with the drive member (511) to drive the lifting plate (8) to move. When the lifting plate (8) is at the bottom, the upper edge of the lifting plate (8) is flush with the upper surface of the lifting frame (52).

6. The circuit board testing device according to claim 5, characterized in that: The second drive assembly includes a limiting shaft (91) and a drive arm (92). One end of the drive arm (92) is rotatably mounted on the lifting plate (8), and the other end is a free end located below the drive member (511). The drive arm (92) has a waist-shaped hole (93) along its rotation axis. The limiting shaft (91) passes through the waist-shaped hole (93) and the two can slide relative to each other. The limiting shaft (91) is fixed in the mounting notch (521).

7. The circuit board testing device according to claim 1, characterized in that: The first drive assembly (6) includes a drive rail (61) fixed on the base (3) and arranged around the turntable (4) in a circumferential direction, and a drive frame (62) arranged on the circuit board clamp (5). The drive frame (62) is used to drive the lifting frame (52) to slide up and down. The drive frame (62) is slidably sleeved on the body (51) of the circuit board clamp (5). The drive frame (62) and the lifting frame (52) are connected by a connecting rod (64). An adjusting rod (63) is provided on the drive frame (62). The adjusting rod (63) is adapted to the drive rail (61).

8. The circuit board testing device according to claim 7, characterized in that: The drive track (61) includes a first arc track (611) corresponding to the material receiving and placing position (41) and a second arc track (612) corresponding to the detection position (42). The first arc track (611) and the second arc track (612) are connected end to end and smoothly transition. The distance between the plane of the first arc track (611) and the upper surface of the base (3) is greater than the distance between the plane of the second arc track (612) and the upper surface of the base (3). The height difference between the two is the height difference of the sliding of the lifting frame (52).

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