Visual identification PCB surface defect detection device

Abstract

The invention relates to the technical field of circuit board detection, in particular to a visual recognition PCB surface defect detection device which comprises a positioning shaft and a plurality of sorting assemblies, and each sorting assembly comprises a storage assembly and an air pressure adjusting assembly. The storage assembly comprises a storage plate and a position adjusting ring, and a plurality of through holes are formed in the top face of the storage plate. The air pressure adjusting assembly comprises a ventilation box, an air exhaust assembly and a plugging piece. A first ventilation pipe and a second ventilation pipe are arranged on the side wall of the ventilation box. The blocking piece is arranged in the ventilation box and can move in the horizontal direction. When the PCB storage rack is used, the air exhaust assembly can exhaust air in the multiple storage plates, and the multiple storage plates adsorb the multiple PCBs correspondingly. When detection is completed and the object placing plate rotates, only unqualified PCBs can slide down, qualified PCBs can be adsorbed by the object placing plate, the qualified PCBs cannot collide with other objects, and the qualified PCBs are prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board detection, and particularly relates to a visual recognition PCB surface defect detection device. BACKGROUND

[0002] PCB boards are support and connection carriers of electronic components, and the quality of the PCB boards is directly related to the performance and reliability of the entire electronic product. The PCB boards need to be detected during production. Detection personnel visually detect whether the surface of the PCB is defective. After detection is completed, the qualified and unqualified PCB boards need to be separated for processing. In order to reduce the working strength of the detection personnel, a machine can be used to replace a hand to complete the sorting operation of the PCB board.

[0003] A PCB board detection and sorting device is provided in Chinese patent application No. CN202410273937.X. When the device is in use, a plurality of PCB boards are placed in a plurality of placing slots on a detection plate. After the air in a plurality of ventilation cavities inside the detection plate is sucked away by a blowing and sucking assembly, the detection plate can adsorb the plurality of PCB boards through a plurality of round holes on the top surface of the detection plate. When sorting is needed after detection is completed, if the detection plate rotates forward and the blowing and sucking assembly no longer sucks air, the qualified PCB boards can slide out of the first slot; if the detection plate rotates backward and the blowing and sucking assembly no longer sucks air, the unqualified PCB boards can slide out of the second slot.

[0004] The device has the following deficiencies. The plurality of ventilation cavities are all connected, which causes the detection plate to no longer have adsorption capacity when the detection plate rotates backward and the blowing and sucking assembly no longer sucks air. The qualified and unqualified PCB boards will all slide down along the detection plate. At this time, the qualified PCB boards will collide with the inner wall of the back side of the workbench, increasing the risk of damage to the qualified PCB boards. SUMMARY

[0005] The present application aims to provide a visual recognition PCB surface defect detection device. After the placing plate rotates, only the unqualified PCB boards will slide down, and the qualified PCB boards can be adsorbed by the placing plate. The qualified PCB boards will not collide with other objects, and damage to the qualified PCB boards is avoided.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a visual recognition PCB surface defect detection device, comprising a positioning shaft and a plurality of sorting components, the sorting component comprises a storage component and a gas pressure adjusting component; the storage component comprises: a storage plate, the inside of the storage plate is a cavity, the top surface of the storage plate is provided with a plurality of through holes; a positioning ring is rotatably arranged on the positioning shaft, the storage plate is arranged above the positioning shaft and is fixedly connected with the positioning ring, the inside of the positioning ring is a cavity and is communicated with the inside of the storage plate; the gas pressure adjusting component comprises: a ventilation box, a first ventilation pipe and a second ventilation pipe are arranged on the side wall of the ventilation box, the first ventilation pipe is communicated with the inside of the positioning ring; an air extraction component, the air inlet end of the air extraction component is communicated with the second ventilation pipe; a blocking piece is arranged in the inside of the ventilation box and can move in the horizontal direction, when the blocking piece moves to between the first ventilation pipe and the second ventilation pipe, the first ventilation pipe and the second ventilation pipe are not communicated with each other.

[0007] Preferably, the blocking piece is spherical in structure and is made of elastic rubber, and the spacing of the first ventilation pipe and the second ventilation pipe at one end close to each other is smaller than the diameter of the blocking piece.

[0008] Preferably, the blocking piece is fixedly connected with a positioning disc, the positioning disc is fixedly arranged on a traction cloth, the traction cloth is fixedly connected with the ventilation box, the traction cloth is an elastic cloth, the side of the positioning disc away from the blocking piece is provided with a force applying component, the force applying component comprises a transmission frame, the bottom of the transmission frame is provided with a jacking rod, and the position of the jacking rod corresponds to that of the positioning disc.

[0009] Preferably, the first ventilation pipe and the second ventilation pipe are both arranged at the first end of the ventilation box, the end face of the second end of the ventilation box is open, and the traction cloth can completely cover the end face of the second end of the ventilation box.

[0010] Preferably, the end face of the jacking rod towards the side of the positioning disc is provided with a receiving groove, a pull rope is arranged in the receiving groove, and the two ends of the pull rope are fixedly connected with the positioning disc and the jacking rod respectively.

[0011] Preferably, two protrusions are arranged on the outer side wall of the storage plate, a limiting block is arranged on the top of the transmission frame and between the two protrusions, and the limiting block can slide along the outer surfaces of the two protrusions, there is a distance between the jacking rod and the positioning disc, and the distance between the jacking rod and the positioning disc is greater than the length of the limiting block.

[0012] Preferably, the detection box is further provided, the positioning shaft and the sorting assembly are arranged in the detection box, the transmission frame comprises a horizontally arranged driving rod, a first end of the driving rod is arranged in the detection box, a second end of the driving rod penetrates through a side wall of the detection box and extends to an outside of the detection box, a section of the driving rod is rectangular, the driving rod is in sliding connection with the detection box, and a displacement driving assembly for driving synchronous rotation of the plurality of storage plates is arranged in the detection box.

[0013] Preferably, the detection box is further provided, the positioning shaft and the sorting assembly are arranged in the detection box, the transmission frame comprises a horizontally arranged driving rod, a first end of the driving rod is arranged in the detection box, a second end of the driving rod penetrates through a side wall of the detection box and extends to an outside of the detection box, a section of the driving rod is rectangular, the driving rod is in sliding connection with the detection box, and a displacement driving assembly for driving synchronous rotation of the plurality of storage plates is arranged in the detection box.

[0014] Compared with the prior art, the present application has the following advantages: (1) In use, the air extraction assembly can extract air in the plurality of storage plates, and the plurality of storage plates can adsorb the plurality of PCBs. After detection is completed and the storage plates rotate, only the unqualified PCBs can slide downward, and the qualified PCBs can be adsorbed by the storage plates, so that the qualified PCBs cannot collide with other objects, thereby avoiding damage to the qualified PCBs. Since the sorting assembly comprises a plurality of sorting assemblies, the present application can complete detection of a plurality of PCBs at one time.

[0015] (2) In the present application, the ejector rod can drive the position adjusting disc to move to the inside of the air passage box, so that the sealing piece is clamped between the first air passage and the second air passage. In the process that the ejector rod approaches the position adjusting disc, the pull rope can be accommodated in the accommodation groove, so that the pull rope cannot be clamped by the ejector rod and the position adjusting disc. After the sorting work of the PCBs is completed, the detection personnel control the transmission frame to move away from the air passage box, the pull rope is taut and can pull the position adjusting disc to move to the outside of the air passage box, the position adjusting disc drives the sealing piece to move away from between the first air passage and the second air passage, BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the isometric view of the present application; Figure 2 is the isometric view of the storage assembly and the air pressure adjusting assembly in the present application; Figure 3 is the isometric sectional view of the storage assembly in the present application; Figure 4 is the isometric sectional view of the air pressure adjusting assembly in the present application; Figure 5 is the isometric view of the air extraction assembly in the present application; Figure 6 is the isometric view of the force applying assembly in the present application; Figure 7 is Figure 6Enlarged view of point A in the middle; Figure 8 This is an isometric view of the detection box in this invention; Figure 9 This is an isometric view of the displacement drive component in this invention; Figure 10 This is an isometric view of the receiving assembly in this invention; Figure 11 This is a side sectional view of the invention when the sealing element is in the first position; Figure 12 for Figure 11 Enlarged view of point B in the middle; Figure 13 This is a side sectional view of the invention when the sealing element is in the second position; Figure 14 for Figure 13 Enlarged view of point C in the middle.

[0017] The reference numerals in the figures include: 1-Positioning shaft, 2-Storage assembly, 21-Storage plate, 211-Through hole, 212-Protrusion, 22-Adjusting ring, 221-Third vent pipe, 222-Fourth vent pipe, 3-Air pressure regulating assembly, 31-Ventilation box, 311-First vent pipe, 312-Second vent pipe, 313-Fifth vent pipe, 32-Air extraction assembly, 321-Air extraction pump, 322-Sixth vent pipe, 33-Sealing component, 34-Adjusting plate, 35-Traction 4-Force application component, 41-Transmission frame, 411-Drive rod, 42-Top rod, 421-Collection slot, 43-Pull rope, 44-Limit block, 5-Detection box, 51-Bearing plate, 52-Material receiving port, 6-Positioning drive component, 61-Horizontal plate, 62-Column, 63-First electric telescopic rod, 7-Material receiving component, 71-Transfer plate, 72-Collection rack, 721-Upper receiving plate, 722-Lower receiving plate, 73-Second electric telescopic rod. Detailed Implementation

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

[0019] Please see Figures 1-14The application provides a technical scheme: a visual identification PCB surface defect detection device, which comprises a positioning shaft 1 and a plurality of sorting assemblies, and the plurality of sorting assemblies are distributed at equal intervals in the length extension direction of the positioning shaft 1. The sorting assembly comprises a placing assembly 2, an air pressure adjusting assembly 3 and a force applying assembly 4. After a PCB to be detected is placed on the top of the placing assembly 2, the air pressure adjusting assembly 3 can draw the air in the placing assembly 2, so that the placing assembly 2 adsorbs the PCB. The force applying assembly 4 can change the state of the air pressure adjusting assembly 3, so that the placing assembly 2 no longer adsorbs the PCB. The positioning shaft 1 and the plurality of sorting assemblies are arranged in a detection box 5, and the inside and outside of the detection box 5 are respectively provided with a displacement driving assembly 6 and a material receiving assembly 7. A controller is arranged on the outer side wall of the detection box 5, and the controller is electrically connected with the sorting assembly, the displacement driving assembly 6 and the material receiving assembly 7, so that the working state of each component of the application can be controlled through the controller. The displacement driving assembly 6 can change the angle of the placing assembly 2, and further change the angle of the PCB, so as to quickly complete the sorting work of the PCB. The material receiving assembly 7 can collect the qualified and unqualified PCBs, and the qualified and unqualified PCBs enter different areas in the material receiving assembly 7 respectively.

[0020] Embodiment one

[0021] Please refer to Figures 1-5 and Figures 11-12 The placing assembly 2 comprises a placing plate 21 and a position adjusting ring 22, and the air pressure adjusting assembly 3 comprises an air box 31, an air pumping assembly 32 and a blocking piece 33. The air pumping assembly 32 comprises an air pump 321 and a sixth air pipe 322, the sixth air pipe 322 is communicated with the air boxes 31 through a plurality of second air pipes 312, the air box 31 is communicated with the position adjusting ring 22 through a first air pipe 311, a fifth air pipe 313 and a fourth air pipe 222, and the position adjusting ring 22 is communicated with the placing plate 21 through a third air pipe 221. Before detection starts, the blocking piece 33 is away from the first air pipe 311 and the second air pipe 312 on the inside of the air box 31 and is aligned with the middle position of the first air pipe 311 and the second air pipe 312. A plurality of through holes 211 are arranged on the top surface of the placing plate 21, when the PCB to be detected is placed on the top surface of the placing plate 21, the air pump 321 starts to work, the air in the placing plate 21 is drawn away through the sixth air pipe 322, and the placing plate 21 adsorbs the PCB to be detected through the through holes 211. The detection personnel can visually detect whether the surface of the PCB is defective. Since the sorting assembly has a plurality of sorting assemblies, the detection work of a plurality of PCBs can be completed at one time.

[0022] Please refer to Figures 1-5 and Figures 11-14When the detection ends, i.e. the detection personnel distinguish the qualified and unqualified PCB boards, the detection personnel pushes the blocking piece 33 corresponding to the unqualified PCB board from the first position to the second position, so that the blocking piece 33 moves to between the first air pipe 311 and the second air pipe 312. At this time, the first air pipe 311 and the second air pipe 312 corresponding to the unqualified PCB board are not communicated with each other. The PCB board cannot cover all the through holes 211 on the storage plate 21, so the storage plate 21 corresponding to the unqualified PCB board no longer has the adsorption capacity. The storage plate 21 corresponding to the qualified PCB board is not affected and still has the adsorption capacity. Then the control synchronously rotates the plurality of position adjusting rings 22, thereby driving the plurality of storage plates 21 to rotate downward. Only the unqualified PCB board can slide downward, and the qualified PCB board is adsorbed and cannot slide downward. At this time, the sorting of the PCB board is completed. Since the qualified PCB board does not separate from the storage plate 21, the qualified PCB board does not collide with other objects, thereby avoiding damage to the qualified PCB board.

[0023] Embodiment two

[0024] Please refer to Figure 4 and Figures 11-14 The blocking piece 33 is in a spherical structure and is made of elastic rubber. The spacing between the first air pipe 311 and the second air pipe 312 at one end close to each other is smaller than the diameter of the blocking piece 33. When the blocking piece 33 moves to between the first air pipe 311 and the second air pipe 312, the blocking piece 33 can elastically deform and be firmly clamped between the first air pipe 311 and the second air pipe 312. The blocking piece 33 has good sealing performance and cannot fall off from between the first air pipe 311 and the second air pipe 312.

[0025] Please refer to Figure 4 and Figures 11-14 The air pressure adjusting assembly 3 further includes a position adjusting disc 34 and a traction cloth 35. The blocking piece 33 can move together with the position adjusting disc 34. The traction cloth 35 is elastic cloth. When the position adjusting disc 34 moves, the traction cloth 35 can elastically deform. When the position adjusting disc 34 moves to the inside of the air box 31, the position adjusting disc 34 drives the blocking piece 33 to move to between the first air pipe 311 and the second air pipe 312. The elastic cloth is elongated to generate elastic potential energy. When the position adjusting disc 34 moves to the outside of the air box 31, the position adjusting disc 34 drives the blocking piece 33 to move away from between the first air pipe 311 and the second air pipe 312. The elastic cloth is shortened to release the elastic potential energy, thereby driving the position adjusting disc 34 and the blocking piece 33 to return to the original position. The traction cloth 35 can completely cover the end face of one side of the air box 31, so that the air box 31 does not leak air.

[0026] Embodiment three

[0027] Please refer toFigures 1-7 and Figures 11-14 The force applying assembly 4 comprises a transmission frame 41, a top rod 42 and a pull rope 43. The top rod 42 is provided with a receiving groove 421 at the end face thereof facing the positioning disc 34. The pull rope 43 is arranged in the receiving groove 421. During the air extraction process of the air extraction assembly 32, the transmission frame 41 provides a pulling force to the positioning disc 34 through the top rod 42 and the pull rope 43, so that the blocking member 33 and the positioning disc 34 will not change positions due to the decrease of the air pressure in the ventilation box 31. After the detection is completed, the detection personnel controls the transmission frame 41 to approach the ventilation box 31, so that the top rod 42 abuts against the positioning disc 34. The top rod 42 can push the positioning disc 34 to move towards the inside of the ventilation box 31, so that the blocking member 33 is clamped between the first ventilation pipe 311 and the second ventilation pipe 312. During the process in which the top rod 42 approaches the positioning disc 34, the pull rope 43 can be received into the receiving groove 421, so that the pull rope 43 will not be clamped by the top rod 42 and the positioning disc 34. When the sorting work of the PCB board is completed, the detection personnel controls the transmission frame 41 to move away from the ventilation box 31. After the pull rope 43 is straightened, the pull rope 43 can pull the positioning disc 34 to move towards the outside of the ventilation box 31. The positioning disc 34 drives the blocking member 33 to move away from between the first ventilation pipe 311 and the second ventilation pipe 312. The first ventilation pipe 311 and the second ventilation pipe 312 are reconnected.

[0028] Please refer to Figures 1-7 and Figures 11-14 The force applying assembly 4 further comprises a limiting block 44. The outer side wall of the placing plate 21 is provided with two protrusions 212. During the process in which the detection personnel visually detects the surface of the PCB board, the limiting block 44 is arranged between the two protrusions 212. At this time, the placing plate 21 is in a locked state and cannot rotate, so that the stability of the placing assembly 2 is enhanced and the detection personnel can conveniently detect. At this time, there is a distance between the top rod 42 and the positioning disc 34. The distance between the top rod 42 and the positioning disc 34 is greater than the length of the limiting block 44. When the detection is completed, the detection personnel controls the transmission frame 41 to approach the ventilation box 31. The limiting block 44 slides along the outer surface of the two protrusions 212. When the limiting block 44 is separated from the two protrusions 212, the top rod 42 can contact the positioning disc 34. At this time, the placing plate 21 is in an unlocked state and can rotate.

[0029] Embodiment Four

[0030] Please refer to Figures 1-8 and Figures 11-14The transmission frame 41 comprises a driving rod 411 arranged at the middle portion of the transmission frame 41, and upper and lower supporting rods arranged at the top and bottom portions of the transmission frame 41 respectively. The limiting block 44 is connected with the upper supporting rod, and the top rod 42 is connected with the lower supporting rod. The first end portion of the driving rod 411 is arranged in the detection box 5, and the second end portion of the driving rod 411 penetrates through the side wall of the detection box 5 and extends to the outside of the detection box 5. The detection personnel can drive the transmission frame 41 to move in the horizontal direction by pushing and pulling the second end portion of the driving rod 411. The cross section of the driving rod 411 is rectangular, so the driving rod 411 will not rotate. The bearing plate 51 is arranged below the driving rod 411 in the detection box 5, which can provide support force for the driving rod 411, thereby reducing the burden of the detection personnel when moving the driving rod 411.

[0031] Please refer to Figures 1-9 and Figures 11-14 The displacement driving assembly 6 comprises a horizontal plate 61, a plurality of vertical columns 62 and two first electric telescopic rods 63. The plurality of vertical columns 62 are arranged below the plurality of storage plates 21 respectively. In the process of detecting the PCB, the output ends of the two first electric telescopic rods 63 are in the elongated state, the horizontal plate 61 and the plurality of vertical columns 62 are in the highest position, and the vertical columns 62 abut against the bottom surface of the storage plate 21. When the detection personnel detects the unqualified PCB, the transmission frame 41 at different positions is pushed to move, so that the storage plate 21 corresponding to the unqualified PCB is in the unlocked state. At this time, the output ends of the two first electric telescopic rods 63 are shortened, the storage plate 21 corresponding to the qualified PCB is in the locked state and cannot rotate, and the storage plate 21 corresponding to the qualified PCB is in the unlocked state and can rotate downward. Therefore, the qualified PCB can stay on the storage plate 21, and the unqualified PCB can slide downward and separate from the storage plate 21, thereby completing the sorting work of the PCB.

[0032] Please refer to Figures 1-14 The receiving assembly 7 comprises a plurality of material moving plates 71, a material receiving frame 72 and two second electric telescopic rods 73. The material receiving frame 72 comprises an upper material receiving plate 721 and a lower material receiving plate 722. A plurality of receiving openings 52 are arranged on the side wall of the detection box 5 close to the storage plate 21, and the plurality of material moving plates 71 are arranged in the plurality of receiving openings 52 respectively. In the process of detecting the PCB, the output ends of the two second electric telescopic rods 73 are in the elongated state, the material receiving frame 72 is in the highest position, and the inner top surface of the lower material receiving plate 722 is aligned with the inner top surface of the plurality of material moving plates 71. After the output ends of the two first electric telescopic rods 63 are shortened and the storage plate 21 rotates downward, the inner top surface of the storage plate 21 can be aligned with the inner top surface of the material moving plate 71. After the unqualified PCB slides downward and separates from the storage plate 21, it will directly slide into the material moving plate 71 and finally slide into the lower material receiving plate 722 through the material moving plate 71.

[0033] Please refer toFigures 1-14 When all the unqualified PCBs are dropped into the lower receiving plate 722, the output ends of the two first electric telescopic rods 63 are re-elongated, the horizontal plate 61 and the plurality of columns 62 are all returned to the highest position, and all the storage plates 21 are aligned. Then the output ends of the two second electric telescopic rods 73 are shortened, and the receiving rack 72 is lowered to the lowest position, the inner top surface of the upper receiving plate 721 is aligned with the inner top surface of the plurality of material moving plates 71. Next, the operator pushes the remaining transmission racks 41 into the interior of the detection box 5, and all the blocking pieces 33 are moved between the corresponding first air duct 311 and second air duct 312. All the storage plates 21 lose the adsorption ability, and all the storage plates 21 are in the unlocked state. Then the output ends of the two first electric telescopic rods 63 are shortened, and after the storage plates 21 are turned downward, the qualified PCBs are dropped into the upper receiving plate 721 after being separated from the storage plates 21.

[0034] Please refer to Figures 1-14 In the embodiment, the upper receiving plate 721 is located above the lower receiving plate 722, and the width of the lower receiving plate 722 is greater than the width of the upper receiving plate 721. After the entire sorting process is completed, the detection personnel can quickly take away the qualified and unqualified PCBs and process them respectively. After all the PCBs are taken away, the first electric telescopic rod 63 and the second electric telescopic rod 73 control the plurality of columns 62 and the receiving rack 72 to return to the highest position first, then the air pump 321 is turned off, and all the transmission racks 41 are pulled back to the initial position. The plurality of storage plates 21 are re-locked, and all the blocking pieces 33 are away from between the corresponding first air duct 311 and second air duct 312. The present application can be restored to its original state and wait for the next detection work.

[0035] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0036] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A visual recognition device for detecting defects on PCB surfaces, characterized in that, It includes a positioning shaft and several sorting components, wherein the sorting components include a placement component and an air pressure regulating component; The storage component includes: A shelf, the interior of which is a cavity, and the top surface of which is provided with several through holes; An adjustment ring is rotatably mounted on the positioning shaft. The placement plate is positioned above the positioning shaft and is fixedly connected to the adjustment ring. The interior of the adjustment ring is a cavity and communicates with the interior of the placement plate. The pressure regulating component includes: A venting box, wherein a first vent pipe and a second vent pipe are provided on the side wall of the venting box, and the first vent pipe is connected to the interior of the adjusting ring; An air extraction assembly, wherein the air inlet end of the air extraction assembly is connected to the second vent pipe; A sealing element is disposed inside the vent box and is movable in the horizontal direction. When the sealing element moves between the first vent pipe and the second vent pipe, the first vent pipe and the second vent pipe are not connected to each other.

2. The visual recognition PCB surface defect detection device according to claim 1, characterized in that, The sealing element has a spherical structure and is made of elastic rubber. The distance between the first vent pipe and the second vent pipe at their closest ends is less than the diameter of the sealing element.

3. The visual recognition PCB surface defect detection device according to claim 1, characterized in that, The sealing component is fixedly connected to the adjusting plate, the adjusting plate is fixedly mounted on the traction cloth, the traction cloth is fixedly connected to the venting box, the traction cloth is an elastic cloth, and a force-applying component is provided on the side of the adjusting plate away from the sealing component. The force-applying component includes a transmission frame, and a top rod is provided at the bottom of the transmission frame. The top rod corresponds to the position of the adjusting plate.

4. The visual recognition PCB surface defect detection device according to claim 3, characterized in that, Both the first vent pipe and the second vent pipe are located at the first end of the vent box, and the end face of the second end of the vent box is open, and the traction cloth can completely cover the end face of the second end of the vent box.

5. The visual recognition PCB surface defect detection device according to claim 3, characterized in that, The top rod has a storage groove on the end face facing the adjustment plate, and a pull rope is provided in the storage groove. The two ends of the pull rope are fixedly connected to the adjustment plate and the top rod, respectively.

6. The visual recognition PCB surface defect detection device according to claim 3, characterized in that, Two protrusions are provided on the outer wall of the shelf, and a limiting block is provided on the top of the transmission frame. The limiting block is located between the two protrusions and can slide along the outer surface of the two protrusions. There is a distance between the top rod and the adjusting plate, and the distance between the top rod and the adjusting plate is greater than the length of the limiting block.

7. The visual recognition PCB surface defect detection device according to claim 3, characterized in that, It also includes a detection box, in which the positioning shaft and the sorting assembly are both located. The transmission frame includes a horizontally arranged drive rod, with the first end of the drive rod located inside the detection box and the second end of the drive rod passing through the side wall of the detection box and extending to the outside of the detection box. The cross-section of the drive rod is rectangular, and the drive rod is slidably connected to the detection box. The detection box is equipped with a displacement drive assembly for driving several of the placement plates to rotate synchronously.

8. The visual recognition PCB surface defect detection device according to claim 7, characterized in that, It also includes a receiving assembly, which includes several transfer plates and a receiving rack. The side wall of the test box near the placement plate is provided with several receiving ports. Several transfer plates are respectively disposed in several receiving ports, and the receiving rack is disposed on the outside of the test box.

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