Circuit board detection equipment

Abstract

The invention relates to the technical field of detection, in particular to circuit board detection equipment which comprises a supporting frame, a driving block is fixed to the surface of the supporting frame, a first piston rod is arranged at the bottom of the driving block, a detection head is arranged at the bottom of the first piston rod, a base and a lifting frame are arranged on the surface of the supporting frame, and a containing groove is formed in the surface of the lifting frame; a sucker is arranged at the bottom of the rotating rod, a limiting frame is arranged at the bottom of the rotating rod, a connecting pipe is fixed to the top of the sucker, a second extension ring is fixed to the top of the connecting pipe, a sealing ring is arranged on the surface of the connecting pipe, and a moving ring is arranged in the second extension ring; the device has the beneficial effects that the swing rod is driven by the stress rod to swing downwards, the limiting frame descends, and after the limiting frame descends, due to the fact that one side of the bottom of the limiting frame is arc-shaped, the circuit board abuts against the arc-shaped surface of the bottom of the limiting frame, and the position of the circuit board is corrected.

Description

Technical Field

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

[0002] A printed circuit board (PCB) is a highly reliable and flexible printed circuit board made from polyimide or polyester film. It features high wiring density, light weight, thinness, and excellent bendability.

[0003] In the prior art, the patent number is CN110987809A, and the name is a circuit board detection device, which includes: a detection bracket, which is used to be detachably installed on the transportation path of the circuit board, wherein an imaging location is provided in the space area enclosed by the detection bracket; at least two imaging mounting components, at least two imaging mounting components are respectively used to install different numbers of imaging devices, at least two imaging mounting components are adjustable in position on the detection bracket, and each imaging mounting component can be adjusted to the imaging location; a controller, which is used to control the imaging device installed on the imaging mounting component located at the imaging location to image the circuit board located on the transportation path.

[0004] However, the existing circuit board inspection equipment uses a suction cup to suck up the circuit board and then places the circuit board on the inspection table. Since the suction cup lacks a device to correct the position of the circuit board after sucking the circuit board, the circuit board will be offset when placed on the inspection table, affecting the inspection of the circuit board. Summary of the Invention

[0005] The object of the present invention is to provide a circuit board detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a circuit board detection device, comprising: A support frame, a driving block is fixed on the surface of the support frame, a first piston rod is provided at the bottom of the driving block, a detection head is provided at the bottom of the first piston rod, a base and a lifting frame are provided on the surface of the support frame, and a placement groove is provided on the surface of the lifting frame; A rotating rod, a suction cup is provided at the bottom of the rotating rod, a limiting frame is provided at the bottom of the rotating rod, a connecting tube is fixed on the top of the suction cup, a second extension ring is fixed on the top of the connecting tube, a sealing ring is provided on the surface of the connecting tube, and a movable ring is provided inside the second extension ring.

[0007] Preferably, a first chute is formed on the surface of the support frame, a cross bar is inserted into the first chute, both ends of the cross bar are located in the first chute, the cross bar can move in the first chute, a second chute is formed on the surface of the cross bar, a moving block is arranged in the second chute, the moving block can move in the second chute, a cylinder is fixed to the bottom of the moving block, a second piston rod is arranged at the bottom of the cylinder, the cylinder can drive the second piston rod to move up and down, a motor is fixed to the bottom of the second piston rod, a rotating rod is arranged at the bottom of the motor, and the motor can drive the rotating rod to rotate.

[0008] Preferably, a holding frame is fixed to the surface of the motor, a ring groove is formed on the surface of the holding frame, a holding ring is sleeved on the surface of the ring groove, a notch is formed on the surface of the holding ring, the holding ring is stuck on the surface of the ring groove through the notch, a nut is screwed on the surface of the holding frame, and the nut abuts against the surface of the holding ring to make the holding ring stable in the ring groove.

[0009] Preferably, an air pipe is arranged on the end surface of the rotating rod, the end of the air pipe is connected with a vacuum pumping device, a vertical pipe is fixed to the bottom of the rotating rod, the inside of the vertical pipe is communicated with the inside of the air pipe, a second extension ring is fixed to the bottom of the vertical pipe, a moving ring is arranged inside the second extension ring, the moving ring can move inside the second extension ring, a plurality of groups of balls are arranged inside the second extension ring, the balls are located at the top and bottom of the moving ring, a connecting pipe is fixed to the bottom of the moving ring, the connecting pipe moves along with the moving ring, a sealing ring is arranged at the bottom of the second extension ring, and the other end of the sealing ring is connected to the surface of the connecting pipe.

[0010] Preferably, the sealing ring is flexible, a suction cup is fixed to the bottom of the connecting pipe, the suction cup moves along with the connecting pipe, a telescopic ring is arranged at the bottom of the suction cup, the telescopic ring can be telescopic, a rubber ring is fixed to the bottom of the telescopic ring, the suction cup can adsorb on the surface of the circuit board, the rubber ring contacts with the circuit board, and after the inside of the suction cup is evacuated, the telescopic ring drives the rubber ring to approach the bottom of the suction cup and the telescopic ring contracts.

[0011] Preferably, a first extension ring is fixed to the surface of the rotating rod, a swinging rod is fixed to the surface of the first extension ring, an elastic rod is arranged on the surface of the swinging rod, the other end of the elastic rod is connected to the surface of the rotating rod, the elastic rod has a thrust force to make the end of the swinging rod away from the surface of the rotating rod, a limiting frame is fixed to the other end of the swinging rod, one side of the bottom of the limiting frame is arc-shaped, and the limiting frame is in a U shape, there are two groups of limiting frames, and the limiting frames are located on both sides of the suction cup.

[0012] Preferably, a connecting rod is fixed to the surface of the swing rod, a force-bearing rod is fixed to the end of the connecting rod, the force-bearing rod is connected between the two groups of connecting rods, and the force-bearing rod is located at the top of the rotating rod. When the rotating rod rotates, the force-bearing rod moves to the bottom of the top holding frame, and the top holding ring on the surface of the top holding frame can be supported on the surface of the force-bearing rod, so that the force-bearing rod drives the swing rod to swing through the connecting rod.

[0013] Preferably, the circuit board can be placed in the placement groove, and the detection head is held on the surface of the circuit board after the first piston rod descends, and the circuit board is detected by the detection head, and the lifting frame is inserted into the top of the base, and a spring is provided inside the lifting frame, and the spring is held between the lifting frame and the base, and the lifting frame can be inserted into the inside of the base, and the circuit board descends with the lifting frame.

[0014] Preferably, the suction cup can be adsorbed on the surface of the circuit board, and after the limit frame is lowered, one side of the arc-shaped bottom of the limit frame is held on the end of the circuit board, and the position of the circuit board is adjusted. The suction cup moves with the circuit board, so that the movable ring moves inside the second extension ring, and the ball is held on the surface of the movable ring. The movement of the movable ring drives the ball to roll.

[0015] Preferably, the connecting tube moves with the suction cup and the movable ring, and the movement of the connecting tube causes the sealing ring to deform. The interiors of the connecting tube, suction cup and vertical tube are connected, and the vacuum equipment connected by the air pipe can vacuum the interiors of the suction cup, connecting tube and vertical tube, so that the circuit board is adsorbed on the bottom of the suction cup.

[0016] Compared with the prior art, the present invention has the following beneficial effects: After the motor drives the rotating rod proposed in the present invention to rotate, the suction cup on one side of the adsorbed circuit board moves to the bottom of the top holding frame. The surface of the top holding frame is sleeved with a top holding ring, and the surface of the top holding ring is provided with a notch. The top holding ring can be replaced, and the nut is screwed, and the nut is supported on the surface of the top holding ring to fix the top holding ring. After the rotating rod is rotated, the top holding ring is supported on the surface of the force-bearing rod, so that the force-bearing rod drives the swing rod to move downward through the connecting rod. A first extension ring is provided on the surface of the swing rod, and the first extension ring has elastic force, so that the swing rod swings upward, and under the drive of the force-bearing rod, the swing rod swings downward, so that the limit frame descends. After the limit frame descends, since the bottom side of the limit frame is arc-shaped, the circuit board is supported on the arc surface of the bottom of the limit frame to correct the position of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0019] Figure 3It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 4 This is a schematic structural diagram of another cross-section of the present invention.

[0021] Figure 5 It is a schematic diagram of the rotating rod structure of the present invention.

[0022] Figure 6 This is a structural schematic diagram of the rotating rod of the present invention from another perspective.

[0023] Figure 7 It is a schematic diagram of a partially enlarged structure of the rotating rod of the present invention.

[0024] Figure 8 This is a structural schematic diagram of a partially enlarged view of the rotating rod of the present invention from another perspective.

[0025] Figure 9 It is a schematic diagram of the structure of the top support frame of the present invention.

[0026] Figure 10 It is a schematic diagram of the cross-sectional structure of the suction cup of the present invention.

[0027] In the figure: support frame 1, drive block 2, first piston rod 3, detection head 4, base 5, lifting frame 6, placement groove 7, first slide groove 8, cross bar 9, moving block 10, second slide groove 11, cylinder 12, second piston rod 13, motor 14, rotating rod 15, top holding frame 16, air pipe 17, first extension ring 18, elastic rod 19, force rod 20, connecting rod 21, swing rod 22, limit frame 23, suction cup 24, top holding ring 25, ring groove 26, nut 27, vertical pipe 28, ball 29, second extension ring 30, moving ring 31, sealing ring 32, connecting pipe 33, telescopic ring 34, rubber ring 35. DETAILED DESCRIPTION

[0028] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 10 , the present invention provides a technical solution: Embodiment 1: A circuit board detection device comprises: a support frame 1, a driving block 2 is fixed on the surface of the support frame 1, a first piston rod 3 is provided at the bottom of the driving block 2, a detection head 4 is provided at the bottom of the first piston rod 3, a base 5 and a lifting frame 6 are provided on the surface of the support frame 1, and a placement groove 7 is provided on the surface of the lifting frame 6; a rotating rod 15, a suction cup 24 is provided at the bottom of the rotating rod 15, a limiting frame 23 is provided at the bottom of the rotating rod 15, a connecting tube 33 is fixed at the top of the suction cup 24, a second extension ring 30 is fixed at the top of the connecting tube 33, a sealing ring 32 is provided on the surface of the connecting tube 33, a moving ring 31 is provided inside the second extension ring 30, the moving ring 31 is located inside the second extension ring 30, the moving ring 31 can move its position inside the second extension ring 30, and the sealing ring 32 at the bottom of the second extension ring 30 remains sealed, so that the circuit board can always be adsorbed on the bottom of the suction cup 24 and can adjust its position.

[0030] Embodiment 2: On the basis of Embodiment 1, a first chute 8 is formed on the surface of the support frame 1. A cross bar 9 is inserted into the first chute 8. Both ends of the cross bar 9 are located in the first chute 8, and the cross bar 9 can move in the first chute 8. A second chute 11 is formed on the surface of the cross bar 9. A moving block 10 is arranged in the second chute 11, and the moving block 10 can move in the second chute 11. A cylinder 12 is fixed to the bottom of the moving block 10. A second piston rod 13 is arranged at the bottom of the cylinder 12. The cylinder 12 can drive the second piston rod 13 to move up and down. A motor 14 is fixed to the bottom of the second piston rod 13. A rotating rod 15 is arranged at the bottom of the motor 14. The motor 14 can drive the rotating rod 15 to rotate. A first extension ring 18 is fixed to the surface of the rotating rod 15. A swing rod 22 is fixed to the surface of the first extension ring 18. An elastic rod 19 is arranged on the surface of the swing rod 22. The other end of the elastic rod 19 is connected to the surface of the rotating rod 15. The elastic rod 19 has a thrust force, which makes the end of the swing rod 22 away from the surface of the rotating rod 15. A limiting frame 23 is fixed to the other end of the swing rod 22. One side of the bottom of the limiting frame 23 is arc-shaped, and the limiting frame 23 is in a U shape. There are two groups of the limiting frames 23, and the limiting frames 23 are located on both sides of the suction cup 24. A connecting rod 21 is fixed to the surface of the swing rod 22. A stress rod 20 is fixed to the end of the connecting rod 21. The stress rod 20 is connected between the two connecting rods 21. The stress rod 20 is located above the rotating rod 15. When the rotating rod 15 rotates, the stress rod 20 moves to the bottom of the holding frame 16. The holding ring 25 on the surface of the holding frame 16 can hold against the surface of the stress rod 20, so that the stress rod 20 drives the swing rod 22 to swing through the connecting rod 21. The circuit board can be placed in the placement groove 7. After the detection head 4 descends with the first piston rod 3, it holds against the surface of the circuit board, and the circuit board is detected by the detection head 4. Moreover, the lifting frame 6 is inserted into the top of the base 5. A spring is arranged inside the lifting frame 6. The spring holds against between the lifting frame 6 and the base 5. The lifting frame 6 can be inserted into the inside of the base 5. The circuit board descends with the lifting frame 6. The lifting frame 6 can descend in the base 5 to play a buffering role. The cross bar 9 can move in the first chute 8, and the moving block 10 can move in the second chute 11 to realize the adjustment of the position of the cylinder 12. When the suction cup 24 adsorbs on the surface of the circuit board, since the bottom of the suction cup 24 is lower than the bottom of the limiting frame 23, the limiting frame 23 will not contact the circuit board.

[0031] The surface of the motor 14 is fixed with a top support frame 16, and the surface of the top support frame 16 is provided with an annular groove 26. The surface of the annular groove 26 is sleeved with a top support ring 25. The surface of the top support ring 25 is provided with a notch. The top support ring 25 is clamped on the surface of the annular groove 26 through the notch. The surface of the top support frame 16 is screwed with a nut 27. The nut 27 is supported on the surface of the top support ring 25, so that the top support ring 25 is stable in the annular groove 26. The suction cup 24 can be adsorbed on the surface of the circuit board, and after the limit frame 23 is lowered, one side of the arc-shaped bottom of the limit frame 23 is supported on the end of the circuit board to adjust the circuit board. The suction cup 24 moves with the circuit board, causing the moving ring 31 to move inside the second extension ring 30. The ball 29 is supported on the surface of the moving ring 31. The movement of the moving ring 31 drives the ball 29 to roll, and the telescopic ring 34 contracts, causing the circuit board to move closer to the bottom of the limit frame 23. The moving ring 31 is located inside the second extension ring 30. The moving ring 31 can move its position inside the second extension ring 30, and the sealing ring 32 at the bottom of the second extension ring 30 remains sealed, so that the circuit board can always be adsorbed on the bottom of the suction cup 24.

[0032] An air pipe 17 is provided on the end surface of the rotating rod 15, and the end of the air pipe 17 is connected to the vacuum equipment. A vertical pipe 28 is fixed to the bottom of the rotating rod 15, and the interior of the vertical pipe 28 is communicated with the interior of the air pipe 17. A second extension ring 30 is fixed to the bottom of the vertical pipe 28, and a moving ring 31 is provided inside the second extension ring 30. The moving ring 31 can move inside the second extension ring 30, and a ball 29 is provided inside the second extension ring 30. The ball 29 is located at the top and bottom of the moving ring 31, and there are multiple groups of ball 29. A connecting pipe 33 is fixed to the bottom of the moving ring 31, and the connecting pipe 33 moves with the moving ring 31. A sealing ring 32 is provided at the bottom of the second extension ring 30, and the other end of the sealing ring 32 is connected to the surface of the connecting pipe 33. The sealing ring 32 is flexible. A suction cup 24 is fixed to the bottom, and the suction cup 24 moves with the connecting tube 33. A telescopic ring 34 is provided at the bottom of the suction cup 24, and the telescopic ring 34 can be telescoped. A rubber ring 35 is fixed to the bottom of the telescopic ring 34, and the suction cup 24 can be adsorbed on the surface of the circuit board. The rubber ring 35 contacts the circuit board, and after the interior of the suction cup 24 is vacuumed, the telescopic ring 34 drives the rubber ring 35 close to the bottom of the suction cup 24, and the telescopic ring 34 contracts. The connecting tube 33 moves with the suction cup 24 and the moving ring 31. The movement of the connecting tube 33 causes the sealing ring 32 to deform. The interiors of the connecting tube 33, the suction cup 24 and the vertical pipe 28 are connected. The vacuuming equipment connected to the air pipe 17 can vacuum the interiors of the suction cup 24, the connecting tube 33 and the vertical pipe 28, so that the circuit board is adsorbed on the bottom of the suction cup 24.

[0033] The circuit board is placed in the placement groove 7, and the first piston rod 3 is driven to descend by the driving block 2, so that the detection head 4 is supported on the surface of the circuit board. The circuit board is detected by the detection head 4, and the lifting frame 6 can be lowered in the base 5 to play a buffering role. The cross bar 9 can move in the first slide groove 8, and the moving block 10 can move in the second slide groove 11 to adjust the position of the cylinder 12. When the suction cup 24 is adsorbed on the surface of the circuit board, the bottom of the suction cup 24 is lower than the bottom of the limit frame 23, so the limit frame 23 will not contact the circuit board. After the motor 14 drives the rotating rod 15 to rotate, the suction cup 24 on one side of the adsorbed circuit board moves to the bottom of the top holding frame 16. The surface of the top holding frame 16 is provided with a top holding ring 25, and the surface of the top holding ring 25 is notched. The top holding ring 25 can be replaced. Screw the nut 27, and the nut 27 is supported on the surface of the top holding ring 25 to fix the top holding ring 25. After the rotating rod 15 rotates, the top holding ring 25 is supported on the surface of the force rod 20, so that the force rod 20 is connected to the connecting rod 21. The swing rod 22 is driven to move downward. A first extension ring 18 is provided on the surface of the swing rod 22. The first extension ring 18 has elastic force, which makes the swing rod 22 swing upward. Under the drive of the force-bearing rod 20, the swing rod 22 swings downward, causing the limit frame 23 to descend. After the limit frame 23 descends, since the bottom side of the limit frame 23 is curved, the circuit board is supported on the curved surface of the bottom of the limit frame 23, correcting the position of the circuit board, and the telescopic ring 34 on the surface of the suction cup 24 can shrink. When the suction cup 24 is vacuumed, the telescopic ring 34 shrinks, causing the circuit board to move closer to the bottom of the limit frame 23, and the moving ring 31 is located inside the second extension ring 30. The moving ring 31 can move its position inside the second extension ring 30, and the sealing ring 32 at the bottom of the second extension ring 30 remains sealed, so that the circuit board can always be adsorbed on the bottom of the suction cup 24 and can be adjusted. The circuit board is driven to move to the top of the placement groove 7 by the suction cup 24, and the suction cup 24 no longer adsorbs the circuit board, causing the circuit board to fall into the placement groove 7.

[0034] Although the above describes the illustrative specific embodiments of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A circuit board testing device, characterized in that: include: A support frame (1), a driving block (2) is fixed on the surface of the support frame (1), a first piston rod (3) is provided at the bottom of the driving block (2), a detection head (4) is provided at the bottom of the first piston rod (3), a base (5) and a lifting frame (6) are provided on the surface of the support frame (1), and a placement groove (7) is provided on the surface of the lifting frame (6); A rotating rod (15) is provided with a suction cup (24) at the bottom of the rotating rod (15), a limiting frame (23) is provided at the bottom of the rotating rod (15), a connecting tube (33) is fixed to the top of the suction cup (24), a second extension ring (30) is fixed to the top of the connecting tube (33), a sealing ring (32) is provided on the surface of the connecting tube (33), and a moving ring (31) is provided inside the second extension ring (30).

2. A circuit board testing device according to claim 1, characterized in that: The support frame (1) is provided with a first chute (8) on the surface thereof, a cross bar (9) is inserted into the first chute (8), both ends of the cross bar (9) are located in the first chute (8), the cross bar (9) can move in the first chute (8), a second chute (11) is provided on the surface of the cross bar (9), a moving block (10) is provided in the second chute (11), the moving block (10) can move in the second chute (11), a cylinder (12) is fixed at the bottom of the moving block (10), a second piston rod (13) is provided at the bottom of the cylinder (12), the cylinder (12) can drive the second piston rod (13) to move up and down, a motor (14) is fixed at the bottom of the second piston rod (13), a rotating rod (15) is provided at the bottom of the motor (14), and the motor (14) can drive the rotating rod (15) to rotate.

3. The circuit board testing device according to claim 2, characterized in that: A top support frame (16) is fixed to the surface of the motor (14), a ring groove (26) is provided on the surface of the top support frame (16), a top support ring (25) is sleeved on the surface of the ring groove (26), a notch is provided on the surface of the top support ring (25), the top support ring (25) is clamped on the surface of the ring groove (26) through the notch, a nut (27) is screwed on the surface of the top support frame (16), the nut (27) is supported on the surface of the top support ring (25), so that the top support ring (25) is stabilized in the ring groove (26).

4. The circuit board testing device according to claim 3, characterized in that: An air pipe (17) is provided on the end surface of the rotating rod (15), and the end of the air pipe (17) is connected to a vacuum pumping device. A vertical pipe (28) is fixed to the bottom of the rotating rod (15), and the interior of the vertical pipe (28) is communicated with the interior of the air pipe (17). A second extension ring (30) is fixed to the bottom of the vertical pipe (28), and a moving ring (31) is provided inside the second extension ring (30). The moving ring (31) can move inside the second extension ring (30). Balls (29) are provided inside the second extension ring (30), and the balls (29) are located at the top and bottom of the moving ring (31). There are multiple groups of balls (29). A connecting pipe (33) is fixed to the bottom of the moving ring (31), and the connecting pipe (33) moves with the moving ring (31). A sealing ring (32) is provided at the bottom of the second extension ring (30), and the other end of the sealing ring (32) is connected to the surface of the connecting pipe (33).

5. The circuit board testing device according to claim 4, characterized in that: The sealing ring (32) is flexible. A suction cup (24) is fixed to the bottom of the connecting pipe (33). The suction cup (24) moves along with the connecting pipe (33). A telescopic ring (34) is provided at the bottom of the suction cup (24). The telescopic ring (34) can be telescoped. A rubber ring (35) is fixed to the bottom of the telescopic ring (34). The suction cup (24) can adsorb on the surface of the circuit board. The rubber ring (35) contacts the circuit board. After the inside of the suction cup (24) is evacuated, the telescopic ring (34) drives the rubber ring (35) to approach the bottom of the suction cup (24), and the telescopic ring (34) contracts.

6. The circuit board testing device according to claim 5, characterized in that: A first extension ring (18) is fixed to the surface of the rotating rod (15). A swinging rod (22) is fixed to the surface of the first extension ring (18). A resilient rod (19) is provided on the surface of the swinging rod (22). The other end of the resilient rod (19) is connected to the surface of the rotating rod (15). The resilient rod (19) has a thrust force, causing the end of the swinging rod (22) to move away from the surface of the rotating rod (15). A limiting frame (23) is fixed to the other end of the swinging rod (22). One side of the bottom of the limiting frame (23) is arc-shaped, and the limiting frame (23) is in a U-shaped. There are two sets of limiting frames (23), and the limiting frames (23) are located on both sides of the suction cup (24).

7. The circuit board testing device according to claim 6, characterized in that: A connecting rod (21) is fixed to the surface of the swinging rod (22). A stress rod (20) is fixed to the end of the connecting rod (21). The stress rod (20) is connected between two connecting rods (21). The stress rod (20) is located above the rotating rod (15). When the rotating rod (15) rotates, the stress rod (20) moves to the bottom of the holding frame (16). The holding ring (25) on the surface of the holding frame (16) can hold against the surface of the stress rod (20), causing the stress rod (20) to drive the swinging rod (22) to swing through the connecting rod (21).

8. The circuit board testing device according to claim 7, characterized in that: The circuit board can be placed in the placement groove (7). After the detection head (4) descends along with the first piston rod (3), it holds against the surface of the circuit board, and the circuit board is detected by the detection head (4). The lifting frame (6) is inserted into the top of the base (5). A spring is provided inside the lifting frame (6), and the spring holds between the lifting frame (6) and the base (5). The lifting frame (6) can be inserted into the inside of the base (5), and the circuit board descends along with the lifting frame (6).

9. The circuit board testing device according to claim 8, characterized in that: The suction cup (24) can adsorb on the surface of the circuit board. After the limiting frame (23) descends, the arc-shaped side of the bottom of the limiting frame (23) holds against the end of the circuit board to adjust the position of the circuit board. The suction cup (24) moves along with the circuit board, causing the moving ring (31) to move inside the second extension ring (30). The ball (29) holds against the surface of the moving ring (31), and the movement of the moving ring (31) drives the ball (29) to roll.

10. The circuit board testing device according to claim 9, characterized in that: The connecting tube (33) moves along with the suction cup (24) and the movable ring (31), and the movement of the connecting tube (33) causes the sealing ring (32) to deform. The interiors of the connecting tube (33), the suction cup (24), and the vertical tube (28) are interconnected. The vacuuming device connected to the air pipe (17) can vacuum the interiors of the suction cup (24), the connecting tube (33), and the vertical tube (28), so that the circuit board is adsorbed on the bottom of the suction cup (24).

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