Circuit board detection equipment

Abstract

The invention relates to the technical field of circuit board detection, in particular to circuit board detection equipment which comprises a limiting frame, a supporting roller, a lifting rod, a probe detector, a lifting groove, a straightening assembly, a conveying assembly, a circuit board end limiting assembly, a first pressing switch and a second pressing switch. After the front end of the flexible circuit board is detected to move to the conduction test station, the front end of the flexible circuit board is clamped, and then the conveying roller and the straightening roller are moved downwards synchronously, so that the conveying roller is separated from the flexible circuit board, and the straightening roller is in contact with the flexible circuit board; the straightening roller drives the rear end of the flexible circuit board to move to the rear side to straighten the flexible circuit board, so that the problems that the flexible circuit board which moves quickly cannot accurately stay below the conduction test station and the surface curvature of the flexible circuit board is different are solved; therefore, the problem that the probe of the conduction test equipment cannot be accurately contacted with the contact on the flexible circuit board to cause a test error is solved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board detection, in particular to a circuit board detection device. Background Art

[0002] Circuit boards play a core role in electronic devices and are key components for realizing various functions of electronic devices. They are mainly divided into three types: rigid circuit boards, flexible circuit boards, and rigid-flexible circuit boards. Among them, flexible circuit boards are widely used in the field of medical equipment because they can be bent and folded arbitrarily within a certain range and adapt 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 realize the collection, processing and display of human physiological signals. In some implantable medical devices such as pacemakers, flexible circuit boards can be bent and fitted according to the physiological structure inside the human body, which makes it possible for the miniaturization and high performance of the equipment.

[0003] During the production process of flexible circuit boards in medical equipment, after the electronic components are installed on the flexible circuit boards through surface mounting technology or plug-in technology, a continuity test is required to check whether the welding between the components and the circuit boards is good, whether there is poor conductivity caused by cold soldering or solder leakage, and whether there are short circuits between components caused by welding errors, so as to detect defective products in time and avoid adverse effects caused by defective products being put on the market.

[0004] When batches of flexible circuit boards are moved to the bottom of the continuity test station by conveying equipment, due to the toughness of the flexible circuit boards, there are different degrees of curvature on the surface of the flexible circuit boards during inspection, resulting in the inability of the probes of the subsequent continuity test equipment to accurately contact the contacts on the flexible circuit boards; in addition, due to the inertia of the rapidly moving flexible circuit boards, the flexible circuit boards cannot accurately stay at the continuity test station, which makes it easy for errors to occur during the continuity test.

[0005] Therefore, a circuit board detection device is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a circuit board detection device, which clamps the front end of the flexible circuit board after detecting that the front end of the flexible circuit board moves to the conduction test station, and then synchronously moves down the conveying roller and the straightening roller, so that the conveying roller is separated from the flexible circuit board and the straightening roller contacts the flexible circuit board, and the straightening roller drives the rear end of the flexible circuit board to move backward to straighten the flexible circuit board. This solves the problem that the fast-moving flexible circuit board cannot accurately stay under the conduction test station, and the problem that the probe of the conduction test equipment cannot accurately contact the contact on the flexible circuit board due to the different surface curvatures of the flexible circuit board, resulting in test errors. The device has the effect of fully ensuring the conduction test efficiency of the flexible circuit board and greatly improving the conduction test accuracy of the flexible circuit board.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A circuit board detection device comprises a limit frame, a support roller, a lifting rod, a probe detector, and also comprises a lifting slot, a straightening component, a conveying component, a circuit board end limit component, a first push switch and a second push switch, wherein four lifting slots are symmetrically opened on the inner side of the limit frame with respect to the support roller, a plurality of conveying components are symmetrically installed on the inner side of the limit frame with respect to the support roller, and the conveying components in the same linear direction are arranged at equal intervals, the straightening component is installed between two conveying components in the same linear direction, the circuit board end limit component is installed at the end of the limit frame, the first push switch and the second push switch are installed on the conveying component, the first push switch is connected to the straightening component, and the second push switch is connected to the conveying component, when the flexible circuit board moves along the conveying component and contacts with the circuit board end limit component, the circuit board end limit component controls the conveying component to descend, and when the conveying component descends, the straightening component is synchronously driven to move downward, and when the first push switch and the second push switch are squeezed by the conveying component, they respectively connect the straightening component power supply and disconnect the conveying component power supply.

[0009] Preferably, the conveying assembly includes a bottom frame, a slider, a driving motor, a driving shaft, a slide, a connecting plate, a buffer seat, a base, a bottom plate, a micro-electric rod and a conveying roller, the bottom frame and the base are both installed on a limit frame, the slider is slidably connected to the bottom frame, the driving motor is installed on the side wall of the slider, and the driving motor is connected to a second push switch, the buffer seat is installed on the inner bottom surface of the base, the connecting plate is installed between the top of the buffer seat and the bottom of the slider, the slide is installed on the end of the connecting plate away from the slider, the driving shaft is rotatably installed between the slider and the slide, and the end of the driving shaft is connected to the output shaft of the driving motor, the conveying roller is installed on the outer periphery of the driving shaft, the bottom plate is installed between the bottom frame and the base, and the micro-electric rod is installed between the top of the bottom plate and the bottom of the connecting plate.

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

[0011] Preferably, a limiting plate is installed at the end of the driving shaft, and a side wall of the limiting plate is provided with a slot adapted to the end of the driving shaft.

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

[0013] Preferably, an axial hole adapted to the driving shaft and the limiting plate is provided at the axial position of the conveying roller, an annular cavity is provided inside the conveying roller, and an anti-slip sleeve is attached to the outer periphery of the conveying roller.

[0014] Preferably, the straightening assembly includes a lifting bar, a reverse motor, a limit block, a straightening roller, a vertical bar and a socket, the lifting bar is slidably arranged in the lifting groove, the reverse motor is installed on the surface of the lifting bar, and the reverse motor is connected to the first press switch, the limit block is slidably arranged in the lifting groove, and the limit block is in contact with the reverse motor, the straightening roller is rotatably arranged on the side wall of the limit block, and the straightening roller is connected to the output shaft of the reverse motor, the vertical bar is installed at the end of the lifting bar, the socket is constructed at the bottom of the vertical bar, and the socket is adapted to the end of the connecting plate.

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

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention intercepts the flexible circuit board at the end of the continuity test station so that the end of the flexible circuit board is aligned with the end of the continuity test station, and then clamps and fixes the end of the flexible circuit board, and simultaneously lowers the straightening roller and the conveying roller so that the straightening roller contacts the flexible circuit board and the conveying roller separates from the flexible circuit board, thereby quickly straightening the flexible circuit board, and then making the flexible circuit board accurately stay at the continuity test station, so that the contact of the flexible circuit board is accurately connected with the probe of the continuity test equipment, effectively improving the continuity test accuracy of the flexible circuit board, and facilitating maintaining the efficiency of the continuity test.

[0018] 2. Through the straightening component and conveying component that are set up, the conveying component conveys the flexible circuit board at a higher speed during the conveying process. When one end of the flexible circuit board moves to the front end of the conduction test station, the conveying component drives the straightening component to descend synchronously, and 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 synchronously change the power-on state of the reverse motor and the drive motor, which can not only maintain the conduction test efficiency of the flexible circuit board at a higher state, but also avoid the reverse motor and the drive motor being in the on state at the same time to cause energy waste; after the power supply of the conveying motor is disconnected, it can also prevent the bending amplitude of the flexible circuit board caused by the rotation of the conveying roller from further increasing, which is beneficial to assist in improving the conduction test accuracy of the flexible circuit board.

[0019] 3. By setting up the straightening component and the circuit board end limit component, when the end of the flexible circuit board contacts the pressure sensor, when the pressure sensor feeds back the monitoring signal to the controller, the flip motor and the micro-electric rod power supply are quickly turned on, so that the lower pressure bar is flipped to press the end of the flexible circuit board, and the micro-electric rod contracts and presses the first press switch to turn on the reverse motor power supply, which can quickly straighten the flexible circuit board, thereby greatly improving the conduction test efficiency of the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

[0027] Figure 8 It is a structural schematic diagram of the straightening assembly of the present invention;

[0028] Fig. 9 It is a schematic structural diagram of the circuit board end limit assembly of the present invention.

[0029] In the figure: 1, limit frame; 2, support roller; 3, lifting rod; 4, probe detector; 5, lifting slot; 6, straightening assembly; 61, lifting bar; 62, reverse motor; 63, limit block; 64, straightening roller; 65, vertical bar; 66, socket; 7, conveying assembly; 71, bottom frame; 7101, slide slot; 72, slider; 73, drive motor; 74, drive shaft; 741, limit piece; 742, slot; 75, slide; 76, connecting plate; 77, buffer Punch seat; 771, limit cylinder; 772, limit rod; 773, spring; 78, base; 79, bottom plate; 710, micro electric rod; 711, conveying roller; 7111, shaft hole; 7112, annular cavity; 7113, anti-slip sleeve; 8, circuit board end limit assembly; 81, flip motor; 82, lower pressure strip; 83, silicone strip; 84, block; 85, controller; 86, pressure sensor; 9, first push switch; 10, second push switch. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 9 The present invention provides a circuit board detection device, and the technical solution is as follows:

[0032] Reference Figure 1 and Figure 2A circuit board detection device includes a limit frame 1, a support roller 2, a lifting rod 3, and a probe detector 4. The limit frame 1 is provided with a straight-line notch set at equal intervals. The support roller 2 is rotatably installed at the inner side of the limit frame 1 at equal intervals. The support roller 2 provides support for the flexible circuit board during the transportation and conduction test of the flexible circuit board, so that the flexible circuit board can move more smoothly and avoid bending of the flexible circuit board due to the downward pressure of the probe, thereby assisting in improving the conduction test accuracy of the flexible circuit board. Four lifting rods 3 are distributed in a matrix on both sides of the limit frame 1. The probe detector 4 is installed between the tops of the piston rods of the four lifting rods 3; it also includes a lifting slot 5 , straightening component 6, conveying component 7, circuit board end limit component 8, first push switch 9 and second push switch 10, four lifting grooves 5 are symmetrically opened on the inner side of the limit frame 1 with respect to the support roller 2, the front view cross section of the lifting groove 5 is a mountain shape, and the middle part of the lifting groove 5 is connected with the inner side of the limit frame 1; multiple conveying components 7 are symmetrically installed on the inner side of the limit frame 1 with respect to the support roller 2, the conveying components 7 are located in the one-line gap, and the conveying components 7 in the same straight line direction are arranged at equal intervals. In the conveying state, the top of the conveying component 7 is higher than the inner support surface of the limit frame 1, which can avoid the bottom of the flexible circuit board from scratching the limit frame 1, and the conveying in the conduction test state The top of the conveying component 7 is lower than the inner supporting surface of the limit frame 1; the straightening component 6 is installed between the two conveying components 7 in the same straight line direction. When the conveying component 7 moves downward as a whole, it will drive the straightening component 6 to move downward together, so that the bottom of the straightening component 6 contacts the upper surface of the flexible circuit board; the circuit board end limit component 8 is installed at the end of the limit frame 1. When the end of the flexible circuit board contacts the circuit board end limit component 8, the circuit board end limit component 8 detects the pressure brought by the forward action of the flexible circuit board, and switches the straightening component 6 and the conveying component 7 from the conveying state to the test state respectively, and the first press switch 9 and the second press switch 10 are pressed. Installed on the conveying component 7, the first push switch 9 is connected to the straightening component 6, and the second push switch 10 is connected to the conveying component 7. In the conveying state, the power of the conveying component 7 is turned on and the power of the straightening component 6 is turned off. In the test state, the power of the conveying component 7 is turned off and the power of the straightening component 6 is turned on; when the flexible circuit board moves along the conveying component 7 and contacts with the circuit board end limit component 8, the circuit board end limit component 8 controls the conveying component 7 to descend, and when the conveying component 7 descends, it simultaneously drives the straightening component 6 to move downward. When the first push switch 9 and the second push switch 10 are squeezed by the conveying component 7, they respectively turn on the power of the straightening component 6 and disconnect the power of the conveying component 7.

[0033] Reference Figure 3As an embodiment of the present invention, specifically, the conveying assembly 7 includes a bottom frame 71, a slider 72, a drive motor 73, a drive shaft 74, a slide 75, a connecting plate 76, a buffer seat 77, a base 78, a bottom plate 79, a micro-electric rod 710 and a conveying roller 711. The bottom frame 71 and the base 78 are both installed on the limit frame 1. The bottom frame 71 and the base 78 are located on both sides of the one-line notch, and the bottom frame 71 and the base 78 are away from each other and are flush with the edge of the notch. The slider 72 is slidably connected to the bottom frame 71, and the slider 72 can slide up and down along the inner side of the bottom frame 71. The drive motor 73 is installed on the side wall of the slider 72. When the slider 72 moves up and down, the drive motor 73 changes its height accordingly, and the drive motor 73 is connected to the second press switch 10. When the second press switch 10 is squeezed by the downwardly moved connecting plate 76, the power supply of the drive motor 73 is disconnected to avoid the drive motor 73 driving the conveying roller 711 to idle and cause energy waste. The buffer seat 77 is installed on the inner bottom surface of the base 78. 76 is installed between the top of the buffer seat 77 and the bottom of the slider 72. When the micro-electric rod 710 is extended or retracted, the connecting plate 76 can remain stable under the cooperation of the limit seat, the bottom frame 71 and the slider 72. The slide 75 is installed on 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 bottom plate 79 is installed between the bottom frame 71 and the base 78, and the micro-electric rod 710 is installed between the top of the bottom plate 79 and the bottom of the connecting plate 76. When the micro-electric rod 710 is extended or retracted, it drives the connecting plate 76 to move downward. When the micro-electric rod 710 is retracted, 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 states of the straightening component 6 and the conveying component 7.

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

[0035] Reference Figure 7 As an embodiment of the present invention, specifically, a limiting plate 741 is installed at the end of the driving shaft 74, and a slot 742 adapted to the end of the driving shaft 74 is opened on the side wall of the limiting plate 741. Under the action of the limiting plate 741 and the slot 742, the driving shaft 74 is conveniently connected to the output shaft of the driving motor 73.

[0036] Reference Figure 4As an 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 toward the inside of the limiting cylinder 771, and then the distance between the bottom of the connecting plate 76 and the top of the limiting cylinder 771 is reduced, so that the spring 773 is also in a compressed state, which is conducive to maintaining the smooth downward movement of the connecting plate 76.

[0037] Reference Figure 6 As an embodiment of the present invention, specifically, an axial hole 7111 adapted to the drive shaft 74 and the limiting plate 741 is opened at the axial position of the conveying roller 711, and an annular cavity 7112 is opened inside the conveying roller 711. The outer periphery of the conveying roller 711 is affixed with an anti-slip sleeve 7113. When the drive shaft 74 is inserted into the axial hole 7111, the limiting plate 741 is affixed with the edge of the axial 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 As an embodiment of the present invention, specifically, the straightening assembly 6 includes a lifting bar 61, a reverse motor 62, a limit block 63, a straightening roller 64, a vertical bar 65 and a socket 66. The lifting bar 61 is slidably arranged in the lifting slot 5. The reverse motor 62 is installed on the surface of the lifting bar 61, and the reverse motor 62 is connected to the first pressing switch 9. When the first pressing switch 9 is not in a pressing state, the power supply of the reverse motor 62 is disconnected. When the first pressing switch 9 is pressed by the connecting plate 76, the power supply of the reverse motor 62 is in a connected state. The limit block 63 is slidably arranged in the lifting slot 5, and the limit block 63 is in contact with the reverse motor 62. The straightening roller 64 is rotatably arranged on the side wall of the limit block 63, and the straightening roller 64 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 socket 66 is constructed at the bottom of the vertical bar 65, and the socket 66 is adapted to the end of the connecting plate 76. When the power of the reverse motor 62 is turned on, the straightening roller 64 is lowered in height under the contraction of the micro-electric rod 710, and 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 limit assembly 8 to move to the side away from the circuit board end limit assembly 8, thereby stretching the flexible circuit board to a straightened state.

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

[0040] Working principle: Before the detection, the stopper 84 is in a horizontal state, and the 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, and the conveying roller 711 rotates under the action of the driving motor 73 connected to the power supply, thereby driving the flexible circuit board to move toward the side of the stopper 84 until the front end of the flexible circuit board contacts the pressure sensor 86;

[0041] When the flexible circuit board contacts the pressure sensor 86, the pressure sensor 86 detects the pressure of the flexible circuit board caused by the forward action, and recognizes that the end of the flexible circuit board is aligned with the front end of the conduction test station. The controller 85 controls the switching of the power supply of the micro-electric rod 710 and the flip motor 81 accordingly. First, the flip motor 81 is turned on in the forward direction, so that it drives the lower pressure bar 82 and the stopper 84 to rotate clockwise. The controller 85 and the stopper 84 rotate to below the inner support surface of the limit frame 1, and the lower pressure bar 82 drives the silicone strip 83 to flip and press the end of the flexible circuit board. The micro-electric rod 710 contracts and drives the connecting plate 76 to move downward;

[0042] When the connecting plate 76 moves downward, the conveying roller 711 and the straightening roller 64 are synchronously driven downward. The top of the conveying roller 711 is first lower than the inner supporting surface of the limit frame 1, so that the conveying roller 711 is separated from the bottom surface of the flexible circuit board, and 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 down to the lowest point. Under the action of the connecting plate 76, the first push switch 9 and the second push switch 10 are in a compressed state at the same time. At this time, the power supply of the driving motor 73 is disconnected, and the power supply of the reverse motor 62 is connected. The reverse motor 62 drives the straightening roller 64 to rotate counterclockwise, driving the flexible circuit board away from the pressure sensor The end of the sensor 86 that is not pressed down by the silicone strip 83 moves toward the side away from the pressure sensor 86, thereby stretching the flexible circuit board to a straight state, and then the lifting rod 3 drives the probe detector 4 to move downward, and the probe on the probe detector 4 is precisely connected with the contact on the flexible circuit board. After the conduction test is completed, the lifting rod 3 drives the probe detector 4 to move upward, and the controller 85 controls the block 84 and the lower pressure bar 82 to reset through the power supply. When the block 84 and the lower pressure bar 82 rotate in the opposite direction to 45°, the conveying motor drives the conveying roller 711 to rotate, driving the flexible circuit board after the conduction test to pass through between the lower pressure bar 82 and the block 84, and then the block 84 is reset to the initial state, and the above operation is repeated to perform an efficient conduction test on the flexible circuit board.

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

Claims

1. A circuit board testing device, comprising a limit frame (1), a support roller (2), a lifting rod (3), and a probe tester (4), characterized in that: The invention also comprises a lifting slot (5), a straightening component (6), a conveying component (7), a circuit board end limit component (8), a first push switch (9) and a second push switch (10), wherein the four lifting slots (5) are symmetrically arranged on the inner side of the limit frame (1) with respect to the support roller (2), a plurality of conveying components (7) are symmetrically installed on the inner side of the limit frame (1) with respect to the support roller (2), and the conveying components (7) in the same straight line direction are arranged at equal intervals, the straightening component (6) is installed between two conveying components (7) in the same straight line direction, the circuit board end limit component (8) is installed at the end of the limit frame (1), and the first push switch (9) is installed at the end of the limit frame (1). The switch (9) and the second push switch (10) are installed on the conveying component (7), the first push switch (9) is connected to the straightening component (6), and the second push switch (10) is connected to the conveying component (7). When the flexible circuit board moves along the conveying component (7) and contacts with the circuit board end limit component (8), the circuit board end limit component (8) controls the conveying component (7) to descend, and when the conveying component (7) descends, the straightening component (6) is synchronously driven to move downward. When the first push switch (9) and the second push switch (10) are squeezed by the conveying component (7), they respectively connect the power supply of the straightening component (6) and disconnect the power supply of the conveying component (7).

2. A circuit board testing device according to claim 1, characterized in that: The conveying assembly (7) comprises a bottom frame (71), a slider (72), a driving motor (73), a driving shaft (74), a slide (75), a connecting plate (76), a buffer seat (77), a base (78), a bottom plate (79), a micro-electric rod (710) and a conveying roller (711); the bottom frame (71) and the base (78) are both mounted on the limit frame (1); the slider (72) is slidably connected to the bottom frame (71); the driving motor (73) is mounted on a side wall of the slider (72); the driving motor (73) is connected to a second push switch (10); the buffer seat (77) is mounted on the base (78) ), the connecting plate (76) is installed between the top of the buffer seat (77) and the bottom of the slider (72), the slide (75) is installed at the end of the connecting plate (76) away from the slider (72), the driving shaft (74) is rotatably installed between the slider (72) and the slide (75), and the end of the driving shaft (74) is connected to the output shaft of the driving motor (73), the conveying roller (711) is installed on the outer periphery of the driving shaft (74), the bottom plate (79) is installed between the bottom frame (71) and the base (78), and the micro electric rod (710) is installed between the top of the bottom plate (79) and the bottom of the connecting plate (76).

3. A circuit board detection device according to claim 2, characterized in that: A slide groove (7101) is provided on the inner side of the bottom frame (71), and the slide groove (7101) is adapted to fit the slider (72).

4. A circuit board detection device according to claim 2, characterized in that: A limiting plate (741) is installed at the end of the driving shaft (74), and a slot (742) adapted to the end of the driving shaft (74) is provided on the side wall of the limiting plate (741).

5. A circuit board testing device according to claim 2, characterized in that: The buffer seat (77) comprises a limiting cylinder (771), a limiting rod (772) and a spring (773); the limiting cylinder (771) is mounted on the inner bottom surface of the base (78); the limiting rod (772) is mounted 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).

6. A circuit board testing device according to claim 4, characterized in that: An axial hole (7111) adapted to the drive shaft (74) and the limiting plate (741) is provided at the axial position of the conveying roller (711), 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).

7. A circuit board testing device according to claim 2, characterized in that: The straightening assembly (6) comprises a lifting bar (61), a reverse motor (62), a limit block (63), a straightening roller (64), a vertical bar (65) and a socket (66); the lifting bar (61) is slidably arranged in the lifting slot (5); the reverse motor (62) is mounted on the surface of the lifting bar (61), and the reverse motor (62) is connected to a first pressing switch (9); the limit block (63) is slidably arranged in the lifting slot (5), and the limit block (63) and the reverse motor (62) are in contact with each other; the straightening roller (64) is rotatably arranged on the side wall of the limit block (63), and the straightening roller (64) 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 the socket (66) is adapted to the end of the connecting plate (76).

8. A circuit board testing device according to claim 1, characterized in that: The circuit board end limit assembly (8) comprises a flip motor (81), a lower pressure strip (82), a silicone strip (83), a stopper (84), a controller (85) and a pressure sensor (86); the flip motor (81) is mounted at the end of a limit frame (1), and a right-angle notch is provided on the inner wall of the limit frame (1); the lower pressure strip (82) is mounted 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 stopper (84) is attached to the side wall of the lower pressure strip (82); the controller (85) is mounted on the top of the stopper (84); and the pressure sensor (86) is mounted on the side wall of the stopper (84).

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