A circuit board inspection apparatus

Abstract

This invention relates to the field of circuit board testing technology, specifically to a circuit board testing device, including a limiting frame, support rollers, lifting rods, and a probe detector. It also includes a lifting groove, a straightening assembly, a conveying assembly, a circuit board end limiting assembly, a first pressing switch, and a second pressing switch. This invention solves the problems of rapidly moving flexible circuit boards failing to accurately stop below the continuity testing station, and the probes of the continuity testing device failing to make precise contact with the contacts on the flexible circuit board due to differences in surface curvature. The device addresses the issues of testing errors caused by the flexible circuit board's probes failing to accurately contact the contacts on the flexible circuit board due to the varying surface curvature of the board.

Description

Technical Field

[0001] This invention relates to the field of circuit board testing technology, specifically to a circuit board testing device. Background Technology

[0002] Circuit boards play a central role in electronic devices, serving as key components for realizing various functions. They are mainly classified into three types: rigid circuit boards, flexible circuit boards, and hybrid rigid-flex circuit boards. Among these, flexible circuit boards are widely used in the medical device field due to their ability to be bent and folded within a certain range, adapting to various complex spatial environments and special structural design requirements. For example, in medical monitors, flexible circuit boards can be used to connect various sensors and display modules to achieve the acquisition, processing, and display of human physiological signals. In some implantable medical devices, such as pacemakers, flexible circuit boards can be bent and conformed to the internal physiological structure of the human body, enabling miniaturization and high performance of the device.

[0003] In the production process of flexible circuit boards in medical devices, after electronic components are mounted onto the flexible circuit board using surface mount technology or through-hole technology, a continuity test must be performed to check whether the soldering between the components and the circuit board is good, whether there are poor connections due to cold solder joints or missing solder joints, and whether there are short circuits between components caused by soldering errors. This is to detect defective products in a timely manner and prevent them from entering the market and causing adverse effects.

[0004] When a batch of flexible circuit boards are moved to the continuity test station by the conveyor equipment, the flexible circuit boards have different degrees of curvature on their surfaces during testing due to their toughness. This causes the probes of the subsequent continuity test equipment to be unable to make precise contact with the contacts on the flexible circuit boards. In addition, due to the inertia of the rapidly moving flexible circuit boards, they cannot accurately stop at the continuity test station, which makes it easy for errors to occur during continuity testing.

[0005] Therefore, a circuit board testing device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a circuit board testing device. This device clamps the flexible circuit board after its front end moves to the continuity testing station, and then simultaneously lowers a conveyor roller and a straightening roller. This causes the conveyor roller to separate from the flexible circuit board while the straightening roller contacts it. The straightening roller then moves the rear end of the flexible circuit board backward to straighten it. This solves the problems of the flexible circuit board not being able to accurately stop below the continuity testing station due to rapid movement, and the test errors caused by the probes of the continuity testing device not being able to accurately contact the contacts on the flexible circuit board due to differences in surface curvature. This invention effectively ensures the efficiency of continuity testing for flexible circuit boards and significantly improves the accuracy of continuity testing.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A circuit board testing device includes a limiting frame, support rollers, lifting rods, and a probe detector. It also includes lifting grooves, a straightening assembly, a conveying assembly, a circuit board end limiting assembly, a first press switch, and a second press switch. Four lifting grooves are symmetrically arranged in pairs inside the limiting frame about the support rollers. Multiple conveying assemblies are symmetrically installed inside the limiting frame about the support rollers, with equal spacing between conveying assemblies in the same straight direction. The straightening assembly is installed between two conveying assemblies in the same straight direction. The circuit board end limiting assembly is installed at the end of the limiting frame. The first and second press switches are installed on the conveying assemblies. The first press switch is connected to the straightening assembly, and the second press switch is connected to the conveying assembly. When the flexible circuit board moves along the conveying assembly and contacts the circuit board end limiting assembly, the circuit board end limiting assembly controls the conveying assembly to descend. As the conveying assembly descends, it simultaneously drives the straightening assembly to move downwards. When the first and second press switches are pressed by the conveying assembly, they respectively connect the power supply to the straightening assembly and disconnect the power supply to the conveying assembly.

[0009] Preferably, the conveying assembly includes a base frame, a slider, a drive motor, a drive shaft, a carriage, a connecting plate, a buffer seat, a base, a bottom plate, a miniature electric rod, and a conveying roller. The base frame and the base are both mounted on a limiting frame. The slider is slidably connected to the base frame. The drive motor is mounted on the side wall of the slider and is connected to a second push switch. The buffer seat is mounted on the inner bottom surface of the base. The connecting plate is mounted between the top of the buffer seat and the bottom of the slider. The carriage is mounted on the end of the connecting plate away from the slider. The drive shaft is rotatably mounted between the slider and the carriage, and its end is connected to the output shaft of the drive motor. The conveying roller is mounted on the outer periphery of the drive shaft. The bottom plate is mounted between the base frame and the base. The miniature electric rod is mounted between the top of the bottom plate and the bottom of the connecting plate.

[0010] Preferably, a sliding groove is provided on the inner side of the bottom frame, and the sliding groove is adapted to the slider.

[0011] Preferably, a limiting piece is installed at the end of the drive shaft, and the side wall of the limiting piece has a slot adapted to the end of the drive shaft.

[0012] Preferably, the buffer seat includes a limiting cylinder, a limiting rod, and a spring. The limiting cylinder is installed on the inner bottom surface of the base, the limiting rod is installed on the bottom of the connecting plate, and the bottom of the limiting rod extends into the limiting cylinder. The spring is sleeved on the outer periphery of the limiting rod, and the spring abuts against the bottom of the connecting plate and the top of the limiting cylinder.

[0013] Preferably, the conveying roller has a shaft hole at its axial position that matches the drive shaft and the limiting plate, and an annular cavity is formed inside the conveying roller, with an anti-slip sleeve attached to the outer periphery of the conveying roller.

[0014] Preferably, the straightening assembly includes a lifting bar, a reverse motor, a limiting block, a straightening roller, a vertical bar, and a connector. The lifting bar is slidably disposed within the lifting groove. The reverse motor is mounted on the surface of the lifting bar and is connected to a first push switch. The limiting block is slidably disposed within the lifting groove and is in contact with the reverse motor. The straightening roller is rotatably disposed on the side wall of the limiting block and is connected to the output shaft of the reverse motor. The vertical bar is mounted at the end of the lifting bar. The connector is constructed at the bottom of the vertical bar and is adapted to the end of the connecting plate.

[0015] Preferably, the circuit board end limiting assembly includes a flip motor, a pressure strip, a silicone strip, a stop block, a controller, and a pressure sensor. The flip motor is installed at the end of the limiting frame, and a right-angle notch is provided on the inner wall of the limiting frame. The pressure strip is installed at the end of the output shaft of the flip motor. The silicone strip is attached to the side wall of the pressure strip. The stop block is attached to the side wall of the pressure strip. The controller is installed on the top of the stop block. The pressure sensor is installed on the side wall of the stop block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention intercepts the flexible circuit board at the end of the continuity testing station, aligning the end of the flexible circuit board with the end of the continuity testing station. Then, the end of the flexible circuit board is clamped and fixed, and the straightening roller and the conveying roller are lowered simultaneously. The straightening roller contacts the flexible circuit board, while the conveying roller separates from the flexible circuit board, thereby quickly straightening the flexible circuit board. This allows the flexible circuit board to accurately stop at the continuity testing station, ensuring that the contacts of the flexible circuit board precisely align with the probes of the continuity testing equipment. This effectively improves the continuity testing accuracy of the flexible circuit board and helps maintain the efficiency of the continuity testing.

[0018] 2. Through the setting of straightening and conveying components, the conveying component transports the flexible circuit board at a high speed during the conveying process. When one end of the flexible circuit board moves to the front end of the continuity test station, the conveying component drives the straightening component to descend synchronously. This can quickly switch the contact state between the flexible circuit board and the conveying roller to the contact state between the flexible circuit board and the straightening roller, and simultaneously change the power on / off state of the reverse motor and the drive motor. This not only maintains the continuity test efficiency of the flexible circuit board at a high level, but also avoids energy waste caused by the reverse motor and the drive motor being in the same on state at the same time. After the power of the conveying motor is disconnected, it can also prevent the bending amplitude of the flexible circuit board from further increasing due to the rotation of the conveying roller, which is conducive to improving the continuity test accuracy of the flexible circuit board.

[0019] 3. By using the straightening component and the circuit board end limiting component, when the end of the flexible circuit board comes into contact with the pressure sensor, after the pressure sensor feeds back the monitoring signal to the controller, the power supply of the flip motor and the micro electric rod is quickly turned on, which causes the lower pressure bar to flip and press the end of the flexible circuit board. After the micro electric rod retracts and presses the first press switch, the power supply of the reverse motor is turned on, which can quickly perform the straightening operation of the flexible circuit board, thereby greatly improving the conductivity test efficiency of the flexible circuit board. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention without the lifting rod and probe detector;

[0022] Figure 3 This is a schematic diagram of the conveying assembly of the present invention;

[0023] Figure 4 This is a schematic diagram of the base of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the bottom frame of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the conveying roller of the present invention;

[0026] Figure 7 This is a schematic diagram of the drive shaft of the present invention;

[0027] Figure 8 This is a schematic diagram of the straightening component of the present invention;

[0028] Figure 9 This is a schematic diagram of the circuit board end limiting component of the present invention.

[0029] In the diagram: 1. Limiting frame; 2. Support roller; 3. Lifting rod; 4. Probe detector; 5. Lifting groove; 6. Straightening assembly; 61. Lifting bar; 62. Reverse motor; 63. Limiting block; 64. Pressing roller; 65. Vertical bar; 66. Insert; 7. Conveying assembly; 71. Base frame; 7101. Slide groove; 72. Slider; 73. Drive motor; 74. Drive shaft; 741. Limiting piece; 742. Slot; 75. Carriage; 76. Connecting plate; 77. Buffer 771. Punch seat; 772. Limiting cylinder; 773. Limiting rod; 774. Spring; 78. Base; 79. Base plate; 710. Miniature electric rod; 711. Conveying roller; 7111. Shaft hole; 7112. Annular cavity; 7113. Anti-slip sleeve; 8. Circuit board end limiting assembly; 81. Tilting motor; 82. Lower pressure strip; 83. Silicone strip; 84. Stop block; 85. Controller; 86. Pressure sensor; 9. First press switch; 10. Second press switch. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 9 The present invention provides a circuit board testing device, the technical solution of which is as follows:

[0032] Reference Figure 1 and Figure 2A circuit board testing device includes a limiting frame 1, support rollers 2, lifting rods 3, and a probe detector 4. The limiting frame 1 has equally spaced notches on its inner side. The support rollers 2 are rotatably mounted on the inner side of the limiting frame 1 at equal intervals, providing support for the flexible circuit board during transport and continuity testing, allowing for smoother movement and preventing bending due to probe pressure, thus improving the continuity testing accuracy. Four lifting rods 3 are matrixed on both outer walls of the limiting frame 1, and the probe detector 4 is installed between the tops of the piston rods of the four lifting rods 3. The device also includes a lifting groove 5. The components include a straightening assembly 6, a conveying assembly 7, a circuit board end limiting assembly 8, a first pressing switch 9, and a second pressing switch 10. Four lifting grooves 5 are symmetrically arranged in pairs about the support rollers 2 inside the limiting frame 1. The front view cross-section of the lifting grooves 5 is mountain-shaped, and the middle part of the lifting grooves 5 is connected to the inner side of the limiting frame 1. Multiple conveying assemblies 7 are symmetrically installed about the support rollers 2 inside the limiting frame 1. The conveying assemblies 7 are located within a notch, and the conveying assemblies 7 in the same straight direction are equally spaced. In the conveying state, the top of the conveying assembly 7 is higher than the inner support surface of the limiting frame 1, which can prevent the bottom of the flexible circuit board from rubbing against the limiting frame 1. In the conduction test state, the conveying... The top of the conveying component 7 is lower than the inner support surface of the limiting frame 1; the straightening component 6 is installed between the two conveying components 7 in the same straight direction. When the conveying component 7 moves down as a whole, it will drive the straightening component 6 to move down together, so that the bottom of the straightening component 6 contacts the upper surface of the flexible circuit board; the circuit board end limiting component 8 is installed at the end of the limiting frame 1. When the end of the flexible circuit board contacts the circuit board end limiting component 8, when the circuit board end limiting component 8 detects the pressure brought by the forward movement of the flexible circuit board, it switches the straightening component 6 and the conveying component 7 from the conveying state to the testing state, and the first pressing switch 9 and the second pressing switch 10 are activated. Installed on the conveying assembly 7, the first press switch 9 is connected to the straightening assembly 6, and the second press switch 10 is connected to the conveying assembly 7. In the conveying state, the power supply of the conveying assembly 7 is turned on and the power supply of the straightening assembly 6 is turned off. In the testing state, the power supply of the conveying assembly 7 is turned off and the power supply of the straightening assembly 6 is turned on. When the flexible circuit board moves along the conveying assembly 7 and contacts the end limiting component 8 of the circuit board, the end limiting component 8 of the circuit board controls the conveying assembly 7 to descend. When the conveying assembly 7 descends, it synchronously drives the straightening assembly 6 to move down. When the first press switch 9 and the second press switch 10 are squeezed by the conveying assembly 7, they respectively turn on the power supply of the straightening assembly 6 and turn off the power supply of the conveying assembly 7.

[0033] Reference Figure 3In one embodiment of the present invention, the conveying assembly 7 specifically includes a base frame 71, a slider 72, a drive motor 73, a drive shaft 74, a carriage 75, a connecting plate 76, a buffer seat 77, a base 78, a base plate 79, a miniature electric rod 710, and a conveying roller 711. The base frame 71 and the base 78 are both mounted on the limiting frame 1, located on either side of a notch, with the side of the base frame 71 and the base 78 furthest apart flush with the edge of the notch. The slider 72 is slidably connected to the base frame 71, and can slide up and down along the inner side of the base frame 71. The drive motor 73 is mounted on the side wall of the slider 72, and its height changes accordingly as the slider 72 moves up and down. The drive motor 73 is connected to a second push switch 10, which disconnects the power supply to the drive motor 73 when the second push switch 10 is pressed by the downward-moving connecting plate 76, thus preventing the drive motor 73 from driving the conveying roller 711 to idle and causing energy waste. The buffer seat 77 is mounted on the inner bottom surface of the base 78, and the connecting plate... The connecting plate 76 is installed between the top of the buffer seat 77 and the bottom of the slider 72. When the micro electric rod 710 extends or retracts, the connecting plate 76 can remain stable with the cooperation of the limit seat, the bottom frame 71, and the slider 72. The slide 75 is installed at the end of the connecting plate 76 away from the slider 72. The drive shaft 74 is rotatably installed between the slider 72 and the slide 75, and the end of the drive shaft 74 is connected to the output shaft of the drive motor 73. When the drive motor 73 is powered on, it drives the drive shaft 74 to rotate clockwise from right to left. The conveying roller 711 is installed on the outer periphery of the drive shaft 74. The base plate 79 is installed between the bottom frame 71 and the base 78. The micro electric rod 710 is installed between the top of the base plate 79 and the bottom of the connecting plate 76. When the micro electric rod 710 extends, it drives the connecting plate 76 to move upward. When the micro electric rod 710 retracts, it drives the connecting plate 76 to move downward. When the connecting plate 76 continues to move downward, it will contact the first press switch 9 and the second press switch 10, thereby quickly switching the working state of the straightening component 6 and the conveying component 7.

[0034] Reference Figure 3 and Figure 5 As one embodiment of the present invention, specifically, a groove 7101 is provided on the inner side of the bottom frame 71, and the groove 7101 is adapted to the slider 72. Under the sliding contact of the slider 72 and the groove 7101, it can be ensured that when the miniature electric rod 710 retracts, the connecting plate 76 is displaced in the vertical direction, and there will be no height difference between the two sides of the connecting plate 76.

[0035] Reference Figure 7 As one embodiment of the present invention, specifically, a limiting piece 741 is installed at the end of the drive shaft 74, and a slot 742 adapted to the end of the drive shaft 74 is provided on the side wall of the limiting piece 741. Under the action of the limiting piece 741 and the slot 742, it is convenient to connect the drive shaft 74 to the output shaft of the drive motor 73.

[0036] Reference Figure 4As one embodiment of the present invention, specifically, the buffer seat 77 includes a limiting cylinder 771, a limiting rod 772, and a spring 773. The limiting cylinder 771 is installed on the inner bottom surface of the base 78, the limiting rod 772 is installed on the bottom of the connecting plate 76, and the bottom of the limiting rod 772 extends into the limiting cylinder 771. The spring 773 is sleeved on the outer periphery of the limiting rod 772, and the spring 773 abuts between the bottom of the connecting plate 76 and the top of the limiting cylinder 771. When the connecting plate 76 moves downward with the contraction of the micro electric rod 710, the bottom of the limiting rod 772 gradually moves towards the inside of the limiting cylinder 771, thereby reducing the distance between the bottom of the connecting plate 76 and the top of the limiting cylinder 771, so that the spring 773 is also in a compressed state, which is beneficial to maintain the smooth downward movement of the connecting plate 76.

[0037] Reference Figure 6 In one embodiment of the present invention, specifically, the conveying roller 711 has a shaft hole 7111 at the axial position that is adapted to the drive shaft 74 and the limiting piece 741, and the conveying roller 711 has an annular cavity 7112 inside. The outer periphery of the conveying roller 711 is fitted with an anti-slip sleeve 7113. When the drive shaft 74 is inserted into the shaft hole 7111, the limiting piece 741 fits against the edge of the shaft hole 7111. When the drive shaft 74 rotates together with the output shaft of the drive motor 73, the drive shaft 74 can drive the conveying roller 711 to rotate together.

[0038] Reference Figure 8 In one embodiment of the present invention, the straightening assembly 6 specifically includes a lifting bar 61, a reverse motor 62, a limiting block 63, a straightening roller 64, a vertical bar 65, and an insertion port 66. The lifting bar 61 is slidably disposed within the lifting groove 5. The reverse motor 62 is mounted on the surface of the lifting bar 61 and is connected to a first pressing switch 9. When the first pressing switch 9 is not pressed, the power supply to the reverse motor 62 is disconnected. When the first pressing switch 9 is pressed by the connecting plate 76, the power supply to the reverse motor 62 is turned on. The limiting block 63 is slidably disposed within the lifting groove 5 and is in contact with the reverse motor 62. The straightening roller 64 is rotatably mounted on the side wall of the limiting block 63 and is connected to the output shaft of the reverse motor 62. The vertical bar 65 is installed at the end of the lifting bar 61. The insertion port 66 is constructed at the bottom of the vertical bar 65 and is adapted to the end of the connecting plate 76. When the power of the reverse motor 62 is turned on, the height of the straightening roller 64 is reduced under the contraction action of the micro electric rod 710. The bottom of the straightening roller 64 contacts the upper surface of the flexible circuit board. When the straightening roller 64 rotates, it will drive the end of the flexible circuit board that is not fixed by the circuit board end limiting component 8 to move away from the circuit board end limiting component 8, thereby stretching the flexible circuit board to a taut state.

[0039] Reference Figure 9As one embodiment of the present invention, specifically, the circuit board end limiting assembly 8 includes a flip motor 81, a lower pressure strip 82, a silicone strip 83, a stop block 84, a controller 85, and a pressure sensor 86. The flip motor 81 is installed at the end of the limiting frame 1, and a right-angle notch is provided on the inner wall of the limiting frame 1. The lower pressure strip 82 is installed at the end of the output shaft of the flip motor 81. The silicone strip 83 is attached to the side wall of the lower pressure strip 82. The stop block 84 is attached to the side wall of the lower pressure strip 82. The b-side of the stop block 84 is flush with the a-side of the lower pressure strip 82. The controller 85 is installed on the top of the stop block 84, and the pressure sensor 86 is installed on the side wall of the stop block 84.

[0040] Working principle: Before detection, the stop 84 is in a horizontal state and its bottom is higher than the support surface inside the limit frame 1. The flexible circuit board is placed on the support surface inside the limit frame 1 with equal spacing. The conveying roller 711 rotates under the action of the drive motor 73 when the power is turned on, thereby driving the flexible circuit board to move towards the stop 84 until the front end of the flexible circuit board contacts the pressure sensor 86.

[0041] When the flexible circuit board comes into contact with the pressure sensor 86, the pressure sensor 86 detects the pressure brought by the forward movement of the flexible circuit board and recognizes that the end of the flexible circuit board is aligned with the front end of the continuity test station. The controller 85 controls the switching of the power supply of the micro electric rod 710 and the flip motor 81. First, the flip motor 81 is turned on in the forward direction, which drives the lower pressure bar 82 and the stop block 84 to rotate clockwise. The controller 85 and the stop block 84 rotate to the lower side of the support surface inside the limit frame 1. The lower pressure bar 82 then drives the silicone strip 83 to flip and press down the end of the flexible circuit board. The micro electric rod 710 retracts and drives the connecting plate 76 to move down.

[0042] When the connecting plate 76 moves downward, it simultaneously drives the conveying roller 711 and the straightening roller 64 downward. The top of the conveying roller 711 is first lower than the inner support surface of the limit frame 1, which causes the conveying roller 711 to separate from the bottom surface of the flexible circuit board. The flexible circuit board loses the conveying function of the conveying roller 711. At the same time, as the straightening roller 64 continues to move downward, the straightening roller 64 contacts the upper surface of the flexible circuit board. When the micro electric rod 710 is fully retracted, the connecting plate 76 moves to its lowest point. Under the action of the connecting plate 76, the first press switch 9 and the second press switch 10 are simultaneously in a pressed state. At this time, the power supply of the drive motor 73 is disconnected, while the power supply of the reverse motor 62 is connected. The reverse motor 62 drives the straightening roller 64 to rotate counterclockwise, moving the flexible circuit board away from the pressure transmission. One end of the sensor 86 that is not pressed down by the silicone strip 83 moves away from the pressure sensor 86, thereby stretching the flexible circuit board to a straight state. Then, the lifting rod 3 drives the probe detector 4 to move down, and the probe on the probe detector 4 precisely aligns with the contacts on the flexible circuit board. After the continuity test is completed, the lifting rod 3 drives the probe detector 4 to move up. When the controller 85 controls the stop 84 and the lower pressure strip 82 to reset via the power supply, when the stop 84 and the lower pressure strip 82 rotate in opposite directions to 45°, the conveyor motor drives the conveyor roller 711 to rotate, driving the flexible circuit board after the continuity test to pass between the lower pressure strip 82 and the stop 84. Then, the stop 84 resets to the initial state, and the above operation is repeated to perform an efficient continuity test on the flexible circuit board.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circuit board testing device, comprising a limiting frame (1), a support roller (2), a lifting rod (3), and a probe tester (4), characterized in that: It also includes lifting grooves (5), straightening components (6), conveying components (7), circuit board end limiting components (8), a first pressing switch (9), and a second pressing switch (10). The four lifting grooves (5) are symmetrically arranged in pairs about the support rollers (2) inside the limiting frame (1). Multiple conveying components (7) are symmetrically installed about the support rollers (2) inside the limiting frame (1), and the conveying components (7) in the same straight direction are equally spaced. The straightening component (6) is installed between two conveying components (7) in the same straight direction. The circuit board end limiting component (8) is installed at the end of the limiting frame (1). The first pressing switch (9) and the second pressing switch (10) are also included. Switch (9) and second push switch (10) are installed on conveying assembly (7). The first push switch (9) is connected to straightening assembly (6), and the second push switch (10) is connected to conveying assembly (7). When the flexible circuit board moves along conveying assembly (7) and contacts the end limit assembly (8) of the circuit board, the end limit assembly (8) of the circuit board controls the conveying assembly (7) to descend. When the conveying assembly (7) descends, it synchronously drives the straightening assembly (6) to move down. When the first push switch (9) and the second push switch (10) are squeezed by conveying assembly (7), they respectively turn on the power supply of straightening assembly (6) and turn off the power supply of conveying assembly (7). The conveying assembly (7) includes a base frame (71), a slider (72), a drive motor (73), a drive shaft (74), a carriage (75), a connecting plate (76), a buffer seat (77), a base (78), a base plate (79), a miniature electric rod (710), and a conveying roller (711). The base frame (71) and the base (78) are both mounted on the limiting frame (1). The slider (72) is slidably connected to the base frame (71). The drive motor (73) is mounted on the side wall of the slider (72) and is connected to the second push switch (10). The buffer seat (77) is mounted on the inner bottom surface of the base (78). The connecting plate (76) is mounted on the top of the buffer seat (77) and connected to the slider (72). Between the bottoms, the slide (75) is installed on the connecting plate (76) at the end away from the slider (72), the drive shaft (74) is rotatably installed between the slider (72) and the slide (75), and the end of the drive shaft (74) is connected to the output shaft of the drive motor (73), the conveying roller (711) is installed on the outer periphery of the drive shaft (74), the base plate (79) is installed between the base frame (71) and the base (78), and the miniature electric rod (710) is installed between the top of the base plate (79) and the bottom of the connecting plate (76); mounting plates are provided on both sides of the miniature electric rod (710), and the first push switch (9) and the second push switch (10) are respectively fixedly installed on the mounting plates and located directly below the connecting plate (76); The straightening assembly (6) includes a lifting bar (61), a reverse motor (62), a limiting block (63), a straightening roller (64), a vertical bar (65), and a socket (66). The lifting bar (61) is slidably disposed in the lifting groove (5). The reverse motor (62) is mounted on the surface of the lifting bar (61) and is connected to the first push switch (9). The limiting block (63) is slidably disposed in the lifting groove (5) and is in contact with the reverse motor (62). The straightening roller (64) is rotatably disposed on the side wall of the limiting block (63) and is connected to the output shaft of the reverse motor (62). The vertical bar (65) is mounted on the end of the lifting bar (61). The socket (66) is constructed at the bottom of the vertical bar (65) and is adapted to the end of the connecting plate (76). The circuit board end limiting assembly (8) includes a flip motor (81), a pressure bar (82), a silicone strip (83), a stop block (84), a controller (85), and a pressure sensor (86). The flip motor (81) is installed at the end of the limiting frame (1), and the inner wall of the limiting frame (1) has a right-angle notch. The pressure bar (82) is installed at the end of the output shaft of the flip motor (81). The silicone strip (83) is attached to the side wall of the pressure bar (82). The stop block (84) is attached to the side wall of the pressure bar (82). The controller (85) is installed on the top of the stop block (84). The pressure sensor (86) is installed on the side wall of the stop block (84).

2. The circuit board testing equipment according to claim 1, characterized in that: The bottom frame (71) has a sliding groove (7101) on its inner side, and the sliding groove (7101) is adapted to the slider (72).

3. The circuit board testing equipment according to claim 1, characterized in that: A limiting piece (741) is installed at the end of the drive shaft (74), and the side wall of the limiting piece (741) is provided with a slot (742) that is adapted to the end of the drive shaft (74).

4. The circuit board testing equipment according to claim 1, characterized in that: The buffer seat (77) includes a limiting cylinder (771), a limiting rod (772), and a spring (773). The limiting cylinder (771) is installed on the inner bottom surface of the base (78). The limiting rod (772) is installed on the bottom of the connecting plate (76), and the bottom of the limiting rod (772) extends into the limiting cylinder (771). The spring (773) is sleeved on the outer periphery of the limiting rod (772), and the spring (773) abuts against the bottom of the connecting plate (76) and the top of the limiting cylinder (771).

5. The circuit board testing equipment according to claim 3, characterized in that: The conveying roller (711) has a shaft hole (7111) at its axial position that is adapted to the drive shaft (74) and the limiting piece (741), and an annular cavity (7112) is provided inside the conveying roller (711), and an anti-slip sleeve (7113) is attached to the outer periphery of the conveying roller (711).

Images