Auxiliary testing device for PCB

Abstract

The invention relates to the technical field of PCB (printed circuit board) testing equipment, in particular to an auxiliary testing device for PCBs, which comprises a belt conveyor, a testing chamber is connected onto a rack of the belt conveyor, a CCD (charge coupled device) camera is mounted at the top of the testing chamber, a three-axis moving platform is mounted in the testing chamber, and a metal end is connected onto the three-axis moving platform. Two conveying belts are symmetrically arranged on the belt conveyor, a supporting plate located on the inner sides of the conveying belts is connected into a rack of the belt conveyor and used for supporting a PCB, and a turn-over mechanism used for turning over the PCB is arranged in the rack of the belt conveyor. According to the utility model, the appearance defects of the PCB can be detected through the CCD camera, and the PCB can be turned over automatically through the turn-over mechanism, so that the double-sided test of the PCB can be completed at one time, the PCB does not need to be turned over manually, and the test efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB testing equipment, and particularly to an auxiliary testing device for PCB. Background Art

[0002] A printed circuit board (hereinafter referred to as PCB) is an indispensable component in modern electronic devices. It provides electrical connections between electronic components and supports the physical installation of these components. With the development of electronic technology, the design and manufacturing of PCBs have become increasingly complex, and the requirements for testing their power-on performance have become increasingly strict.

[0003] After retrieval, a Chinese patent with the patent publication number CN112731107B, an automatic inspection device for PCB circuit board defects, includes a base; four groups of shaft frames are fixedly arranged at the top of the base, and four groups of conveying wheels are rotatably arranged inside the shaft frames through rotating shafts, and two groups of plate-shaped conveyor belts are rotatably arranged outside the four groups of conveying wheels; a T-shaped block is fixedly arranged at the convex plate of the outside of the plate-shaped conveyor belt; an auxiliary frame is fixedly arranged at the top of the base, and two groups of L-shaped plates are fixedly arranged on both sides of the top of the auxiliary frame, and the inside of the L-shaped plate is aligned with the top of the T-shaped block.

[0004] Although the above patent can test the power-on ability of the circuit board, the following defects exist in the actual use of the above patent: it can only test one side of the circuit board and cannot meet the requirements of double-sided contact testing. In fact, many circuit boards have contacts not only on one side but also on both the front and back sides to meet the circuit requirements. If a comprehensive inspection is to be carried out on such a circuit board with double-sided contacts, it is necessary to manually turn over the circuit board after the first test and put it back into the placement channel for secondary inspection, which not only increases the workload but also may introduce errors due to human operation, reducing the test efficiency and accuracy. Summary of the Invention

[0005] The purpose of the present invention is to provide an auxiliary testing device for PCB that can perform double-sided testing on PCB in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: an auxiliary testing device for PCB, comprising a belt conveyor, a test chamber connected to the frame of the belt conveyor, a CCD camera installed on the top of the test chamber, a three-axis mobile platform installed in the test chamber, a metal end connected to the three-axis mobile platform, two conveyor belts on the belt conveyor are symmetrically arranged, a support plate located on the inner side of the conveyor belt is connected in the frame of the belt conveyor, and is used to support the PCB, and a turning mechanism for turning over the PCB is arranged in the frame of the belt conveyor, and the turning mechanism includes a turning mechanism arranged on the belt conveyor A lifting plate in the frame of the conveyor, a driving part for driving the lifting plate to rise and fall is installed in the frame of the belt conveyor, the lifting plate is connected with an arc-shaped slide rail, an opening for the arc-shaped slide rail to rise and fall is opened on the support plate, an arc-shaped slide rail is slidably provided with an arc-shaped slide plate, two groups of rotating shafts are rotatably connected to the inner wall of the arc-shaped slide plate, each group of rotating shafts has two and are arranged up and down, each rotating shaft is connected with a clamping plate for clamping the PCB, a driving component 1 for driving the upper and lower clamping plates to rotate towards each other is provided on the arc-shaped slide plate, and a driving component 2 for driving the arc-shaped slide plate to rotate is provided on the arc-shaped slide rail.

[0007] Preferably, a diversion mechanism is provided on the frame of the belt conveyor for diverting qualified PCBs from unqualified PCBs, the diversion mechanism includes a material guide channel connected to the frame of the belt conveyor, the material guide channel is provided with two upper and lower channels, a material guide plate is hinged on the material guide channel, an electric push rod three is hinged on the frame of the belt conveyor, and the telescopic rod of the electric push rod three is hinged to the material guide plate.

[0008] Preferably, two U-shaped support plates are symmetrically slidably provided at the opening of the support plate for supporting the PCB, and two electric push rods 1 are symmetrically installed at the bottom of the support plate, and the telescopic rods of the two electric push rods 1 are respectively connected to the two U-shaped support plates.

[0009] Preferably, a clamping mechanism for clamping the PCB is provided on the frame of the belt conveyor, and the clamping mechanism includes two clamping plates 1 symmetrically slidably arranged on the top of the frame of the belt conveyor, two clamping plates 2 symmetrically slidably arranged on the clamping plate 1, a spring 1 is connected between the clamping plate 2 and the clamping plate 1, an inclined groove is opened on the clamping plate 2, and two L-shaped rods are symmetrically slidably provided at the bottom of the U-shaped support plate, the L-shaped rod is located in the inclined groove on the clamping plate 2 on the same side thereof, and a spring 2 is connected between the L-shaped rod and the U-shaped support plate.

[0010] Preferably, the driving assembly 1 includes two electric push rods 2 hinged on the inner wall of the arc-shaped slide plate, the telescopic rods of the two electric push rods 2 are respectively hinged to the two clamping plates on the lower side, and the upper and lower rotating shafts are connected by a gear set.

[0011] Preferably, the second driving component includes a motor installed outside the arc-shaped slide rail. A spur gear is connected to the output shaft of the motor, and an arc-shaped rack is connected to the outer wall of the arc-shaped slide plate. The arc-shaped rack meshes with the spur gear.

[0012] Preferably, air nozzles are connected to the bottom of the material guide plate and the bottoms of the upper and lower channels of the material guide channel. The air nozzles are used to spray gas upward onto the PCB.

[0013] Preferably, a nozzle for spraying gas onto the PCB is installed on the three-axis moving platform. A telescopic pipe is connected to the nozzle, and the air inlet end of the telescopic pipe extends outside the test room.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The CCD camera can detect the appearance defects of the PCB, and the turning mechanism can automatically turn the PCB over, so that the double-sided test of the PCB can be completed at one time without manually turning the PCB, thereby improving the test efficiency and accuracy.

[0016] 2. The shunting mechanism can automatically classify qualified products and unqualified products without subsequent manual classification, which can improve work efficiency.

[0017] 3. By closing the opening by the mutual approach of the two U-shaped support plates, the PCB can be supported to improve the stability of the PCB, and avoid the PCB being squeezed and sunken downward when the metal end moves downward to test the PCB, thereby improving the test accuracy.

[0018] 4. While the two U-shaped support plates approach each other to support the PCB, they can also drive the first clamping plate and the second clamping plate to clamp and fix the PCB to prevent the PCB from shifting during the test, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0020] Figure 2 It is a partial three-dimensional structure diagram of the present invention.

[0021] Figure 3 It is an installation diagram of the turning mechanism of the present invention.

[0022] Figure 4 It is a three-dimensional structure diagram of the turning mechanism of the present invention.

[0023] Figure 5 It is a partial three-dimensional structure diagram of the turning mechanism of the present invention.

[0024] Figure 6 It is a three-dimensional structure diagram of the shunting mechanism of the present invention.

[0025] Figure 7 This is the installation schematic diagram of the clamping mechanism of the present invention.

[0026] Figure 8 This is the three-dimensional structure schematic diagram of the clamping mechanism of the present invention.

[0027] Figure 9 This is the installation schematic diagram of the nozzle and the telescopic pipe of the present invention.

[0028] Reference numerals in the figure: 1 - belt conveyor, 11 - frame, 12 - conveyor belt, 2 - test chamber, 3 - CCD camera, 4 - three-axis moving platform, 41 - nozzle, 42 - telescopic pipe, 5 - metal end, 6 - support plate, 61 - opening, 62 - U-shaped support plate, 63 - first electric push rod, 71 - lifting plate, 72 - driving member, 73 - arc-shaped slide rail, 74 - arc-shaped slide plate, 75 - rotating shaft, 76 - clamping plate, 77 - second electric push rod, 78 - gear set, 79 - motor, 710 - straight gear, 711 - arc-shaped rack, 81 - material guiding channel, 82 - material guiding plate, 83 - third electric push rod, 91 - first clamping plate, 92 - second clamping plate, 93 - inclined groove, 94 - first spring, 95 - L-shaped rod, 96 - second spring, 10 - air injection pipe. Detailed implementation manners

[0029] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0030] See Figures 1-9, an auxiliary testing device for PCB, comprising a belt conveyor 1, a test chamber 2 is connected to the middle of the top of a frame 11 of the belt conveyor 1, a CCD camera 3 is installed on the top of the test chamber 2, a three-axis moving platform 4 is installed in the test chamber 2, a metal end 5 is connected to the three-axis moving platform 4, and the three-axis moving platform 4 can drive the metal end 5 to move forward, backward, left, right, up and down in three axes to perform a power-on test on the PCB. The three-axis moving platform 4 is a prior art and will not be described in detail here. The conveyor belt 12 on the belt conveyor 1 is symmetrically provided with two front and back conveyor belts, and a support plate 6 located on the inner side of the conveyor belt 12 is connected to the frame 11 of the belt conveyor 1 for The PCB is supported, and a turning mechanism for turning over the PCB is provided in the frame 11 of the belt conveyor 1. The turning mechanism is located directly below the test chamber 2. The turning mechanism includes a lifting plate 71 slidably connected to the frame 11 of the belt conveyor 1 through a guide rod. A driving member 72 for driving the lifting plate 71 to rise and fall is installed in the frame 11 of the belt conveyor 1. In a specific implementation, the driving member 72 is a screw motor. The screw on the screw motor is threadedly connected to the lifting plate 71. The way in which the screw motor drives the lifting plate 71 to rise and fall has high precision and good stability. The top of the lifting plate 71 is connected to an arc-shaped slide rail 73, and the support plate 6 is provided with a slot for the arc-shaped slide rail 73 to move upward and downward. The opening 61 for lifting and lowering is provided with an arc slide 74 in a sliding manner in the arc slide rail 73. The inner wall of the arc slide 74 is rotatably connected with two groups of left and right rotating shafts 75. The number of each group of rotating shafts 75 is two. The two rotating shafts 75 in each group are arranged up and down. Each rotating shaft 75 is connected with a clamping plate 76 for clamping the PCB. The clamping part of the clamping plate 76 is connected with a rubber plate to prevent the clamping plate 76 from directly and rigidly squeezing the PCB and causing damage to the PCB. The arc slide 74 is provided with a driving component 1 for driving the upper and lower clamping plates 76 to rotate in opposite directions. The driving component 1 includes two left and right electric push rods 2 77 hinged on the inner wall of the arc slide 74. The telescopic rods of the two electric push rods 77 are respectively hinged to the two clamping plates 76 on the lower side, and the upper and lower rotating shafts 75 are connected through a gear set 78. The gear set 78 consists of two gears, and the two gears are respectively connected to the upper and lower rotating shafts 75. The two gears are meshed. The arc slide rail 73 is provided with a driving component 2 for driving the arc slide plate 74 to rotate. The driving component 2 includes a motor 79 installed on the left front side of the outer wall of the arc slide rail 73. The output shaft of the motor 79 is connected to two front and rear spur gears 710. The outer wall of the arc slide plate 74 is connected to two front and rear arc racks 711, and the two arc racks 711 are respectively meshed with the two spur gears 710.

[0031] First, connect the metal end 5 in series with the LED lamp and the battery through a circuit. Then, control the operation of the belt conveyor 1 to intermittently convey the PCB to the left. After the PCB enters the test chamber 2 from the left, the CCD camera 3 takes pictures of the PCB. The CCD camera 3 transmits the image information to a controller (the controller is not shown in the figure and is a prior art, so it will not be elaborated here). The controller processes the image information and transmits the processed image information to the background terminal for display to detect the appearance defects of the PCB. After the controller processes the PCB image information, the controller controls the three-axis moving platform 4 to drive the metal end 5 to move in the three axes of front, back, left, right, up, and down to contact the contacts of the PCB for the power-on performance test of the PCB. After one side of the PCB is detected, the controller controls the driving member 72 to drive the lifting plate 71 to move upward, thereby driving the arc-shaped slide rail 73, the arc-shaped slide plate 74, and the clamping plate 76 to move upward, so that the upper clamping plate 76 moves to the upper side of the PCB, and the upper clamping plate 76 is located on the lower side of the PCB. Subsequently, control the telescopic rod of the second electric push rod 77 to extend to push the lower clamping plate 76 to rotate upward, and the lower rotating shaft 75 rotates accordingly. The rotation of the lower rotating shaft 75 drives the upper rotating shaft 75 through the gear set 78 to drive the upper clamping plate 76 to rotate downward, and the upward rotation of the lower clamping plate 76 and the downward rotation of the upper clamping plate 76 clamp the PCB. Then, control the motor 79 to drive the spur gear 710 to rotate, thereby pushing the arc-shaped rack 711 to drive the arc-shaped slide plate 74 to rotate 180 degrees, so that the clamping plate 76 drives the PCB to rotate 180 degrees for turning over, so that the untested side is rotated upward, and thus the double-sided test of the PCB can be completed at one time without manually flipping the PCB, so as to improve the test efficiency and accuracy. Then, control the driving member 72 to drive the lifting plate 71 to move downward to reset, thereby driving the clamping plate 76 to move downward to place the PCB on the support plate 6. Subsequently, control the telescopic rod of the second electric push rod 77 to retract to pull the clamping plate 76 connected thereto to rotate away from the PCB, and under the drive of the gear set 78, the other clamping plate 76 rotates away from the PCB. Then, control the motor 79 to drive the spur gear 710 to reverse, thereby pushing the arc-shaped rack 711 to drive the arc-shaped slide plate 74 to reverse 180 degrees to reset, and the components on the arc-shaped slide plate 74 reverse 180 degrees to reset. Then, the other side of the PCB is tested. After the double-sided test of the PCB is completed, it is sent out of the test chamber 2 to the left by the belt conveyor 1.

[0032] See Figure 1 and Figure 6, a diversion mechanism is provided on the left side of the frame 11 of the belt conveyor 1 for diverting qualified PCBs and unqualified PCBs. The diversion mechanism includes a guide channel 81 connected to the left side of the frame 11 of the belt conveyor 1. The guide channel 81 has two upper and lower channels. The guide channel 81 is inclined with the left side lower and the right side higher to smoothly guide the PCB downward to the left. A guide plate 82 is hinged to the right side of the guide channel 81, and an electric push rod three 83 is hinged to the left side of the frame 11 of the belt conveyor 1. The telescopic rod of the electric push rod three 83 is hinged to the bottom of the guide plate 82.

[0033] Initially, the guide plate 82 is docked with the lower channel of the guide channel 81, and the PCBs tested as qualified slide downward to the left along the lower channel of the guide channel 81. When it is detected that the PCB is unqualified, the controller controls the telescopic rod of the electric push rod three 83 to extend, so as to push the guide plate 82 to swing upward and dock with the upper channel of the guide channel 81. The PCBs tested as unqualified slide downward to the left along the upper channel of the guide channel 81, so as to realize the automatic classification of qualified products and unqualified products, without subsequent manual classification, and the work efficiency can be improved. When it is detected that the PCB is qualified, the controller controls the telescopic rod of the electric push rod three 83 to shorten, so as to pull the guide plate 82 to swing downward and dock with the lower channel of the guide channel 81.

[0034] See Figure 3 , two U-shaped support plates 62 are symmetrically and slidably arranged before and after at the opening 61 on the support plate 6 for supporting the PCB. Two electric push rods one 63 are symmetrically installed before and after at the bottom of the support plate 6, and the telescopic rods of the two electric push rods one 63 are respectively connected to the two U-shaped support plates 62.

[0035] Before the PCB is detected, control the electric push rod one 63 to drive the front and rear U-shaped support plates 62 to approach each other to block the opening 61 to support the PCB, so as to improve the stability of the PCB and avoid the PCB being squeezed and sunken downward when the metal end 5 moves downward to test the PCB, thereby improving the accuracy of the test. After one side of the PCB is tested, control the electric push rod one 63 to drive the front and rear U-shaped support plates 62 to move away from each other to avoid hindering the subsequent automatic turning operation of the PCB.

[0036] See Figures 7-8, a clamping mechanism for clamping the PCB is provided on the frame 11 of the belt conveyor 1. The clamping mechanism is located in the test chamber 2. The clamping mechanism includes a first clamping plate 91 and a second clamping plate 92. Two groups of sliding grooves are symmetrically opened at the front and rear of the top of the frame 11 of the belt conveyor 1. The number of sliding grooves in each group is two. The two sliding grooves in each group are symmetrically arranged left and right. A first clamping plate 91 is slidably connected in each group of sliding grooves. Two guide grooves are symmetrically opened on the left and right of the first clamping plate 91. A second clamping plate 92 is slidably arranged in each of the two guide grooves. Rubber plates for buffering and protecting the PCB are connected to the clamping parts of the first clamping plate 91 and the second clamping plate 92. A first spring 94 is connected between the second clamping plate 92 and the first clamping plate 91. An inclined groove 93 is opened on the second clamping plate 92. Two L-shaped rods 95 are symmetrically and slidably arranged at the bottom of the U-shaped support plate 62. The L-shaped rods 95 are located in the inclined groove 93 on the second clamping plate 92 on the same side as it. A second spring 96 is connected between the L-shaped rod 95 and the U-shaped support plate 62.

[0037] When the two U-shaped support plates 62 at the front and rear approach each other, the L-shaped rods 95 on the front and rear sides are driven to approach each other through the second spring 96. The L-shaped rods 95 on the front and rear sides approach each other and push the second clamping plates 92 on the front and rear sides to approach each other, thereby pushing the first clamping plates 91 on the front and rear sides to approach each other to clamp the PCB. When the first clamping plate 91 contacts the PCB, the first clamping plates 91 and the second clamping plates 92 on the front and rear sides cannot continue to approach each other. Thus, the L-shaped rods 95 on the front and rear sides continue to approach each other and push the second clamping plates 92 on the left and right sides to approach each other to clamp the PCB, and the first spring 94 is compressed accordingly. When the second clamping plate 92 contacts the PCB, the second clamping plates 92 on the left and right sides and the L-shaped rods 95 on the front and rear sides cannot continue to approach each other. Thus, the two U-shaped support plates 62 at the front and rear continue to approach each other and compress the second spring 96. In this way, while the two U-shaped support plates 62 approach each other to support the PCB, the first clamping plate 91 and the second clamping plate 92 can be driven to clamp and fix the PCB to avoid displacement during subsequent PCB testing, thereby improving the accuracy of the test. Similarly, when the two U-shaped support plates 62 at the front and rear move away from each other, the first clamping plate 91 and the second clamping plate 92 are driven to move back to release the PCB, and the first spring 94 and the second spring 96 return to their original states.

[0038] See Figure 6 , air nozzles 10 are connected to the bottom of the material guiding plate 82 and the bottoms of the upper and lower channels of the material guiding channel 81. The air jet ports of the air nozzles 10 on the material guiding plate 82 penetrate through the material guiding plate 82 to spray gas upward on the PCB. The air jet ports of the two air nozzles 10 on the material guiding channel 81 penetrate through the two channels respectively to spray gas upward on the PCB.

[0039] Connect the air injection pipe 10 to an external air delivery device. The air delivery device delivers gas into the air injection pipe 10, and then the air injection pipe 10 sprays the gas upward, so that an air film is formed when the PCB contacts the material guiding plate 82 and the material guiding channel 81, reducing the friction force, reducing the risk of scratching the PCB, and ensuring the smooth leftward export of the PCB.

[0040] See Figure 9 , a nozzle 41 that sprays air downward is installed at the bottom of the Y-axis slide rail of the three-axis moving platform 4. A telescopic pipe 42 is connected to the right side of the nozzle 41, and the air inlet end of the telescopic pipe 42 extends outside the test chamber 2.

[0041] Connect the telescopic pipe 42 to an external air delivery device. When the three-axis moving platform 4 drives the metal end 5 to move back and forth, the nozzle 41 moves back and forth accordingly. At the same time, the air delivery device delivers gas through the telescopic pipe 42 into the nozzle 41, and then the nozzle 41 sprays the gas downward onto the PCB to remove the floating dust and impurities on the surface of the PCB, avoiding test errors caused by dust, and thus improving the accuracy of the power-on test.

[0042] The above-described embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements, and substitutions can be made, and these all belong to the protection scope of the present invention.

Claims

1. An auxiliary testing device for PCB, comprising a belt conveyor (1), a test chamber (2) connected to a frame (11) of the belt conveyor (1), a CCD camera (3) installed on the top of the test chamber (2), characterized in that: A three-axis mobile platform (4) is installed in the test room (2), and a metal end (5) is connected to the three-axis mobile platform (4). Two conveyor belts (12) are symmetrically arranged on the belt conveyor (1). A support plate (6) located inside the conveyor belt (12) is connected to the frame (11) of the belt conveyor (1) and is used to support the PCB. A turning mechanism for turning over the PCB is arranged in the frame (11) of the belt conveyor (1). The turning mechanism includes a lifting plate (71) arranged in the frame (11) of the belt conveyor (1), and a driving member (72) for driving the lifting plate (71) to rise and fall is installed in the frame (11) of the belt conveyor (1). ), the lifting plate (71) is connected to an arc-shaped slide rail (73), the support plate (6) is provided with an opening (61) for the arc-shaped slide rail (73) to be lifted and lowered, an arc-shaped slide plate (74) is slidably provided inside the arc-shaped slide rail (73), two groups of rotating shafts (75) are rotatably connected to the inner wall of the arc-shaped slide plate (74), each group of rotating shafts (75) is two in number and arranged up and down, each rotating shaft (75) is connected to a clamping plate (76) for clamping a PCB, a driving component 1 for driving the upper and lower clamping plates (76) to rotate in opposite directions is provided on the arc-shaped slide rail (73), and a driving component 2 for driving the arc-shaped slide plate (74) to rotate is provided on the arc-shaped slide rail (73).

2. The auxiliary testing device for PCB according to claim 1, characterized in that: A diversion mechanism is provided on the frame (11) of the belt conveyor (1) for diverting qualified PCBs from unqualified PCBs. The diversion mechanism comprises a material guide channel (81) connected to the frame (11) of the belt conveyor (1). The material guide channel (81) is provided with two upper and lower channels. A material guide plate (82) is hingedly connected to the material guide channel (81). An electric push rod (83) is hingedly connected to the frame (11) of the belt conveyor (1). The telescopic rod of the electric push rod (83) is hingedly connected to the material guide plate (82).

3. The auxiliary testing device for PCB according to claim 2, characterized in that: Two U-shaped support plates (62) are symmetrically slidably provided at the opening (61) on the support plate (6) for supporting the PCB. Two electric push rods (63) are symmetrically installed at the bottom of the support plate (6). The telescopic rods of the two electric push rods (63) are respectively connected to the two U-shaped support plates (62).

4. The auxiliary testing device for PCB according to claim 3, characterized in that: A clamping mechanism for clamping a PCB is provided on a frame (11) of the belt conveyor (1), the clamping mechanism comprising two clamping plates (91) symmetrically slidably arranged on the top of the frame (11) of the belt conveyor (1), two clamping plates (92) symmetrically slidably arranged on the clamping plate (91), a spring (94) is connected between the clamping plate (92) and the clamping plate (91), an inclined groove (93) is provided on the clamping plate (92), two L-shaped rods (95) are symmetrically slidably arranged at the bottom of the U-shaped support plate (62), the L-shaped rods (95) are located in the inclined grooves (93) on the clamping plate (92) on the same side thereof, and a spring (96) is connected between the L-shaped rods (95) and the U-shaped support plate (62).

5. The auxiliary testing device for PCB according to claim 4, characterized in that: The driving assembly 1 comprises two electric push rods 2 (77) hinged on the inner wall of the arc-shaped slide plate (74), the telescopic rods of the two electric push rods 2 (77) are respectively hinged to the two clamping plates (76) on the lower side, and the upper and lower rotating shafts (75) are connected by transmission through a gear set (78).

6. The auxiliary testing device for PCB according to claim 5, characterized in that: The second driving assembly comprises a motor (79) installed outside the arc-shaped slide rail (73), the output shaft of the motor (79) is connected to a spur gear (710), the outer wall of the arc-shaped slide plate (74) is connected to an arc-shaped rack (711), and the arc-shaped rack (711) is meshed with the spur gear (710).

7. The auxiliary testing device for PCB according to claim 6, characterized in that: The bottom of the material guide plate (82) and the bottoms of the upper and lower channels of the material guide channel (81) are both connected to a gas injection pipe (10), and the gas injection pipe (10) is used to spray gas upward onto the PCB.

8. The auxiliary testing device for PCB according to claim 7, characterized in that: A nozzle (41) for spraying gas onto the PCB is installed on the three-axis moving platform (4), a telescopic tube (42) is connected to the nozzle (41), and an air inlet end of the telescopic tube (42) extends out of the test chamber (2).

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