Appearance quality detection device for printed circuit board

Abstract

The invention discloses a printed circuit board appearance quality detection device, and relates to the technical field of printed circuit board appearance detection. The printed circuit board appearance quality detection device comprises a detection box and a printed circuit board body, the detection box is provided with a conveying belt used for detecting and conveying the printed circuit board body, and the printed circuit board appearance quality detection device further comprises a detection mechanism arranged on the detection box and used for detecting the printed circuit board body. The detection mechanism comprises a first fixing plate fixedly connected to the detection box, the first U-shaped plate is provided with an image sensor, and the two sides, close to the conveying belt, of the first U-shaped plate are rotationally connected with a plurality of rotating balls. According to the printed circuit board appearance quality detection device, through the arrangement of the detection mechanism, one-time detection of the edge and multiple side faces of the printed circuit board body is achieved, and therefore the detection efficiency of the printed circuit board body is improved while the detection quality of the printed circuit board body is guaranteed.

Description

Technical Field

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

[0002] After the printed circuit board is processed, its appearance needs to be inspected to identify surface defects such as scratches, dents, contamination, oxidation, and copper foil warping or peeling, so as to reduce the risk of abnormal electrical performance, poor heat dissipation, and decreased mechanical strength. This helps to detect problems early, ensure that products meet standards, improve product reliability, and ensure the smooth progress of subsequent welding and assembly processes.

[0003] In the process of testing existing printed circuit boards, the single processed surface of the printed circuit board is mainly tested (authorization announcement number CN104568964B, a printed circuit board appearance testing device and its testing method), which makes it difficult to detect the edges and other surfaces of the printed circuit board, making it difficult to detect defects such as burrs, notches, scratches, grooves, etc. at the edges in a timely manner, thereby reducing the quality of printed circuit board testing. Summary of the invention

[0004] The object of the present invention is to provide a printed circuit board appearance quality inspection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a printed circuit board appearance quality inspection device, comprising a detection box and a printed circuit board body, wherein the detection box is provided with a conveyor belt for inspecting and conveying the printed circuit board body, and further comprising a detection mechanism arranged in the detection box for inspecting the printed circuit board body; The detection mechanism includes a first fixed plate fixedly connected to the detection box, the first fixed plate is connected to a first L-shaped plate on a side close to the conveyor belt through a moving component, the first L-shaped plate is connected to a first U-shaped plate on an end away from the first fixed plate through a rotating component, the first U-shaped plate is provided with an image sensor, and the first U-shaped plate is rotatably connected to a plurality of rotating balls on both sides close to the conveyor belt, a grabbing robot for grabbing the printed circuit board body is provided in the detection box, and the first U-shaped plate is provided with a cleaning mechanism for cleaning the printed circuit board body.

[0006] Preferably, the rotating component is rotatably connected to a second U-shaped plate near one end of the first U-shaped plate, the second U-shaped plate is connected to the first L-shaped plate through a rotating shaft, the second U-shaped plate is provided with a telescopic component for telescoping the first U-shaped plate, and the first L-shaped plate is provided with a first driving component for driving the second U-shaped plate.

[0007] Preferably, the telescopic assembly includes two telescopic tubes fixedly connected to the first U-shaped plate on one side close to the second U-shaped plate and symmetrically arranged, the two telescopic tubes are slidably connected with a telescopic rod, one end of the two telescopic rods is connected to the second U-shaped plate, and the side walls of the two telescopic tubes are sleeved with a first spring, and the two ends of the first springs are respectively connected to the first U-shaped plate and the second U-shaped plate.

[0008] Preferably, the first driving assembly includes a second fixed plate fixedly connected to the side wall of the first L-shaped plate, the second fixed plate is connected to a rack through a reset assembly, the end of the rotating shaft close to the rack is fixedly connected to a gear, the gear and the rack are meshed with each other, the side of the rack close to the first fixed plate is fixedly connected to a driving rod, the end of the first fixed plate away from the bottom wall of the detection box is fixedly connected to the second L-shaped plate, and the second L-shaped plate is arranged opposite to the driving rod.

[0009] Preferably, the reset assembly includes two symmetrically arranged T-shaped rods fixedly connected to the second fixed plate on one side close to the rack, the two T-shaped rod side walls are slidably connected with a reset plate, the opposite ends of the two reset plates are connected to the rack, the two T-shaped rod side walls are sleeved with a second spring, and the two ends of the second springs are respectively connected to the T-shaped rod side walls and the rack.

[0010] Preferably, the moving assembly includes two symmetrically arranged moving tubes fixedly connected to the first fixed plate on one side close to the first L-shaped plate, one of the two moving tubes is slidably connected to a moving rod, one end of the moving rod is connected to the first L-shaped plate, and the other of the two moving tubes is threadedly connected to a threaded rod, and a motor is provided on the side of the first L-shaped plate away from the first fixed plate, and the output end of the motor is connected to the threaded rod.

[0011] Preferably, the cleaning mechanism includes a third fixed plate fixedly connected to one side of the first U-shaped plate, the other side of the third fixed plate is fixedly connected to a cleaning box, the cleaning box is connected to a sliding plate through a telescopic assembly, a plurality of cleaning rods are provided on the side of the sliding plate close to the conveyor belt, the cleaning box is provided with a pushing assembly for pushing each cleaning rod, a cleaning tube is provided on one side of the cleaning box, and an exhaust fan is provided on the side wall of the cleaning tube.

[0012] Preferably, the sliding plate is provided with a plurality of cleaning holes, and each of the cleaning holes is staggered with the cleaning rod.

[0013] Preferably, the pushing assembly includes a connecting plate fixedly connected to one side of the cleaning box, the connecting plate is rotatably connected to a rotating rod, the rotating rod is fixedly connected to a pushing ring at one end close to the conveyor belt, a plurality of conical rods are fixedly connected to the side wall of the pushing ring, the cleaning box is slidably connected to a pushing rod at one side close to the pushing ring, one end of the pushing rod is connected to the sliding plate, and the cleaning tube is provided with a second driving assembly for driving the pushing ring.

[0014] Preferably, the second driving assembly includes a driving box fixedly connected to the side wall of the cleaning tube, the end of the rotating rod away from the pushing ring is located in the driving box and is fixedly connected to a plurality of driving blades, and the rotating rod is eccentrically arranged with the cleaning tube.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This type of printed circuit board appearance quality inspection device, through the setting of the inspection mechanism, can realize the appearance inspection of the edge and multiple sides of the printed circuit board body under the cooperation of the rotating component and the moving component, thereby realizing a one-time inspection of the edge and multiple sides of the printed circuit board body, thereby ensuring the inspection quality of the printed circuit board body while improving the inspection efficiency of the printed circuit board body. At the same time, under the cleaning action of the cleaning mechanism, the cleaning of the printed circuit board body during the appearance inspection process is realized, ensuring the cleanliness of the appearance surface of the printed circuit board body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the detection mechanism in the present invention; Figure 3 It is a structural schematic diagram of the moving mechanism in the present invention; Figure 4 It is a schematic diagram of the structure inside the cleaning mechanism of the present invention; Figure 5 It is a structural schematic diagram of the driving component in the present invention; Figure 6 for Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 7 for Figure 4 A schematic diagram of the enlarged structure at B in the middle; Figure 8 for Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0017] In the figure: 101, detection box; 102, conveyor belt; 103, printed circuit board body; 2, detection mechanism; 201, first fixed plate; 202, first L-shaped plate; 203, first U-shaped plate; 204, image sensor; 205, rotating ball; 206, grab robot; 3, telescopic assembly; 301, telescopic tube; 302, telescopic rod; 303, first spring; 4, rotating assembly; 401, second U-shaped plate; 402, rotating shaft; 5, first driving assembly; 501, second fixed plate; 502, rack; 503, gear; 505, driving rod; 506, second L-shaped plate; 6, complex Position assembly; 601, T-bar; 602, reset plate; 603, second spring; 7, moving assembly; 701, moving tube; 702, moving rod; 703, threaded rod; 704, motor; 8, cleaning mechanism; 801, third fixed plate; 802, cleaning box; 803, sliding plate; 804, cleaning rod; 805, cleaning tube; 806, exhaust fan; 807, cleaning hole; 9, pushing assembly; 901, connecting plate; 902, rotating rod; 903, pushing ring; 904, tapered rod; 905, pushing rod; 10, second driving assembly; 1001, driving box; 1002, driving blades. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 8 The present invention provides a technical solution: a printed circuit board appearance quality inspection device, comprising an inspection box 101 and a printed circuit board body 103, wherein the inspection box 101 is provided with a conveyor belt 102 for inspecting and conveying the printed circuit board body 103, and further comprising an inspection mechanism 2 arranged in the inspection box 101 for inspecting the printed circuit board body 103; The detection mechanism 2 includes a first fixed plate 201 fixedly connected to the detection box 101, a first L-shaped plate 202 is connected to the side of the first fixed plate 201 close to the conveyor belt 102 through a moving component 7, and a first U-shaped plate 203 is connected to the end of the first L-shaped plate 202 away from the first fixed plate 201 through a rotating component 4, the first U-shaped plate 203 is provided with an image sensor 204, and the first U-shaped plate 203 is rotatably connected to the two sides of the conveyor belt 102 with a plurality of rotating balls 205, a grasping robot 206 for grasping the printed circuit board body 103 is provided in the detection box 101, and the first U-shaped plate 203 is provided with a cleaning mechanism 8 for cleaning the printed circuit board body 103; It should be noted here that: through the setting of the detection mechanism 2, under the cooperation of the rotating component 4 and the moving component 7, the appearance detection of the edge and multiple sides of the printed circuit board body 103 can be realized, thereby realizing a one-time detection of the edge and multiple sides of the printed circuit board body 103, thereby ensuring the detection quality of the printed circuit board body 103 while improving the detection efficiency of the printed circuit board body 103.

[0020] See also Figure 6 and Figure 8 The rotating assembly 4 shown in the figure is rotatably connected to the second U-shaped plate 401 at one end of the first L-shaped plate 202 close to the first U-shaped plate 203. The second U-shaped plate 401 is connected to the first L-shaped plate 202 through a rotating shaft 402. The second U-shaped plate 401 is provided with a telescopic assembly 3 for telescoping the first U-shaped plate 203. The first L-shaped plate 202 is provided with a first driving assembly 5 for driving the second U-shaped plate 401. It should be noted here that: by setting the rotating component 4, the image sensor 204 on the first U-shaped plate 203 is rotated, so that it is convenient to detect the appearance of the edge and multiple sides of the printed circuit board body 103.

[0021] See also Figure 6 The telescopic assembly 3 shown in the figure includes two telescopic tubes 301 fixedly connected to the first U-shaped plate 203 near the second U-shaped plate 401 and symmetrically arranged. The two telescopic tubes 301 are slidably connected with telescopic rods 302. One end of the two telescopic rods 302 is connected to the second U-shaped plate 401. The side walls of the two telescopic tubes 301 are sleeved with first springs 303. The two ends of the two first springs 303 are respectively connected to the first U-shaped plate 203 and the second U-shaped plate 401; It should be noted here that: by setting the telescopic component 3, a guiding and resetting function is provided for the movement of the first U-shaped plate 203 or the sliding plate 803.

[0022] See also Figure 3 and Figure 8 The first driving assembly 5 shown in the figure includes a second fixed plate 501 fixedly connected to the side wall of the first L-shaped plate 202, the second fixed plate 501 is connected to a rack 502 through a reset assembly 6, a gear 503 is fixedly connected to one end of the rotating shaft 402 close to the rack 502, the gear 503 and the rack 502 are meshed with each other, a driving rod 505 is fixedly connected to one side of the rack 502 close to the first fixed plate 201, and a second L-shaped plate 506 is fixedly connected to one end of the first fixed plate 201 away from the bottom wall of the detection box 101, and the second L-shaped plate 506 is arranged opposite to the driving rod 505; It should be noted here that: through the setting of the first driving component 5, when the first L-shaped plate 202 continues to move closer to the first fixed plate 201, when the driving rod 505 and the second L-shaped plate 506 are against each other, under the action of the driving force, the rack 502 will be pushed to move. In the process of the movement of the rack 502, the mutual engagement transmission of the rack 502 and the gear 503 will be utilized to drive the second U-shaped plate 401 to rotate, and then drive the image sensor 204 on the first U-shaped plate 203 to rotate.

[0023] See also Figure 8 The reset assembly 6 shown in the figure includes two T-shaped rods 601 fixedly connected to the second fixed plate 501 near the side of the rack 502 and symmetrically arranged with each other, the side walls of the two T-shaped rods 601 are slidably connected with the reset plates 602, the opposite ends of the two reset plates 602 are connected to the rack 502, the side walls of the two T-shaped rods 601 are sleeved with second springs 603, and the two ends of the two second springs 603 are respectively connected to the side walls of the T-shaped rods 601 and the rack 502; It should be noted here that the reset assembly 6 is provided to guide and reset the movement of the rack 502 .

[0024] See also Figure 3 The moving assembly 7 shown in the figure includes two moving tubes 701 that are symmetrically arranged and fixedly connected to the first fixed plate 201 on one side close to the first L-shaped plate 202, one of the two moving tubes 701 is slidably connected to a moving rod 702, one end of the moving rod 702 is connected to the first L-shaped plate 202, and the other of the two moving tubes 701 is threadedly connected to a threaded rod 703, and a motor 704 is provided on the side of the first L-shaped plate 202 away from the first fixed plate 201, and the output end of the motor 704 is connected to the threaded rod 703; It should be noted here that: through the setting of the moving component 7, the first L-shaped plate 202 will be driven to move closer to the first fixed plate 201. When the first L-shaped plate 202 moves closer to the first fixed plate 201, the image sensor 204 on the first U-shaped plate 203 will be driven to move away from the printed circuit board body 103.

[0025] See also Figure 4 The cleaning mechanism 8 shown in the figure includes a third fixed plate 801 fixedly connected to one side of the first U-shaped plate 203, a cleaning box 802 is fixedly connected to the other side of the third fixed plate 801, the cleaning box 802 is connected to a sliding plate 803 through a telescopic component 3, a plurality of cleaning rods 804 are provided on the side of the sliding plate 803 close to the conveyor belt 102, the cleaning box 802 is provided with a pushing component 9 for pushing each cleaning rod 804, a cleaning tube 805 is provided on one side of the cleaning box 802, and a suction fan 806 is provided on the side wall of the cleaning tube 805; It should be noted here that: by setting the cleaning mechanism 8, the cleaning of the printed circuit board body 103 during the appearance inspection is achieved, and the cleanliness of the appearance surface of the printed circuit board body 103 is ensured.

[0026] See also Figure 4 , the sliding plate 803 shown in the figure is provided with a plurality of cleaning holes 807, and each cleaning hole 807 is staggered with the cleaning rod 804; It should be noted here that the provision of multiple cleaning holes 807 facilitates the removal of dust attached to the surface of the printed circuit board body 103 .

[0027] See also Figure 5 and Figure 7 The pushing assembly 9 shown in the figure includes a connecting plate 901 fixedly connected to one side of the cleaning box 802, the connecting plate 901 is rotatably connected to a rotating rod 902, the end of the rotating rod 902 close to the conveyor belt 102 is fixedly connected to a pushing ring 903, a plurality of tapered rods 904 are fixedly connected to the side wall of the pushing ring 903, a pushing rod 905 is slidably connected to the side of the cleaning box 802 close to the pushing ring 903, one end of the pushing rod 905 is connected to the sliding plate 803, and the cleaning tube 805 is provided with a second driving assembly 10 for driving the pushing ring 903; It should be noted here that: through the setting of the pushing component 9, during the rotation of each conical rod 904, when the conical rod 904 and the pushing rod 905 are against each other, the cleaning rod 804 on one side of the sliding plate 803 will be pushed to move on the surface of the printed circuit board body 103 under the mutual force and the guiding action of the telescopic component 3; when the conical rod 904 is away from the pushing rod 905, under the elastic action of the telescopic component 3, the cleaning rod 804 on one side of the sliding plate 803 will be pushed to move in the opposite direction on the surface of the printed circuit board body 103, so that during the rotation of the pushing ring 903, the conical rod 904 will be reciprocally against the pushing rod 905, so that under the mutual force and the guiding action of the telescopic component 3, the cleaning rod 804 will be pushed to move back and forth on the surface of the printed circuit board body 103.

[0028] See also Figure 7 The second driving assembly 10 shown in the figure includes a driving box 1001 fixedly connected to the side wall of the cleaning tube 805, an end of the rotating rod 902 away from the pushing ring 903 is located in the driving box 1001, and is fixedly connected with a plurality of driving blades 1002, and the rotating rod 902 is eccentrically arranged with the cleaning tube 805; It should be noted here that: through the setting of the second driving component 10, when the suction force of the exhaust fan 806 flows in the cleaning tube 805, since the rotating rod 902 in the driving box 1001 is eccentrically set with the cleaning tube 805, the suction force will impact the surface of the driving blade 1002, thereby driving the driving blade 1002 to rotate. In the process of driving the blade 1002 to rotate, the multiple conical rods 904 on the pushing ring 903 at one end of the rotating rod 902 will be driven to rotate.

[0029] Working principle: When testing the printed circuit board body 103, first place the printed circuit board body 103 on the conveyor belt 102, and use the conveyor belt 102 to extend the printed circuit board body 103 into the testing box 101. In the process of conveying the printed circuit board body 103 close to the image sensor 204, when the printed circuit board body 103 and the rotating balls 205 on both sides of the first U-shaped plate 203 collide with each other, the first U-shaped plate 203 will be pushed away from the printed circuit board under the driving force of the printed circuit board body 103 and the guiding action of the telescopic component 3. When the circuit board body 103 moves and the first U-shaped plate 203 is pressed onto the surface of the printed circuit board body 103, the image sensor 204 will be located above the printed circuit board body 103, thereby controlling the distance between the image sensor 204 and the detection surface of the printed circuit board body 103, so that the image sensor 204 maintains a suitable detection distance with the printed circuit board body 103, thereby ensuring the detection accuracy and adapting to the detection of printed circuit board bodies 103 of different thicknesses, thereby improving the flexibility of the detection of the printed circuit board body 103; After the image sensor 204 is located above the printed circuit board body 103, the image sensor 204 can be used to detect the appearance of the printed circuit board body 103. After the appearance detection of one side of the printed circuit board body 103 is completed, the motor 704 is started to drive the threaded rod 703 to rotate. Under the threaded meshing transmission effect of the threaded rod 703 and the moving tube 701 and the guiding effect of the moving rod 702, the first L-shaped plate 202 will be driven to move closer to the first fixed plate 201. In the process of the first L-shaped plate 202 moving closer to the first fixed plate 201, the image sensor 204 on the first U-shaped plate 203 will be driven to move away from the printed circuit board body 103. When the first U-shaped plate 203 is completely separated from the printed circuit board body 103, the printed circuit board body 103 is grabbed by the grabbing robot 206, and the printed circuit board body 103 is rotated. And in the process of the first L-shaped plate 202 continuously moving close to the first fixed plate 201, when the driving rod 505 and the second L-shaped plate 506 are against each other, the rack 502 will be pushed to move under the action of the driving force. In the process of the rack 502 moving, the rack 502 and the gear 503 will be used to drive the second U-shaped plate 401 to rotate, and then drive the image sensor 204 on the first U-shaped plate 203 to rotate. At this time, the grasping robot 206 can be used to grasp the printed circuit board body 103 and drive the printed circuit board body 103 to rotate within the detection area of ​​the image sensor 204, so as to realize the appearance detection of the edge and multiple sides of the printed circuit board body 103, thereby realizing the one-time detection of the edge and multiple sides of the printed circuit board body 103, while ensuring the detection quality of the printed circuit board body 103, the efficiency of the detection of the printed circuit board body 103 is improved; In the process of the image sensor 204 detecting the printed circuit board body 103, the exhaust fan 806 is started, and the suction force of the cleaning tube 805 is used to extract the dust adhering to the surface of the printed circuit board body 103 from the cleaning hole 807 on the sliding plate 803, thereby achieving the cleaning of the printed circuit board body 103 during the appearance detection process, and ensuring the cleanliness of the appearance surface of the printed circuit board body 103; At the same time, when the suction force of the exhaust fan 806 flows in the cleaning tube 805, since the rotating rod 902 in the driving box 1001 is eccentrically arranged with the cleaning tube 805, the suction force will impact the surface of the driving blade 1002, thereby driving the driving blade 1002 to rotate. In the process of driving the fan blade 1002 to rotate, the multiple tapered rods 904 on the pushing ring 903 at one end of the rotating rod 902 will be driven to rotate. In the process of each tapered rod 904 rotating, when the tapered rod 904 and the pushing rod 905 are against each other, the cleaning rod 804 on one side of the sliding plate 803 will be pushed to move on the surface of the printed circuit board body 103 under the mutual force and the guiding action of the telescopic component 3. When the conical rod 904 moves away from the pushing rod 905, the cleaning rod 804 on one side of the sliding plate 803 will be pushed to move in the opposite direction on the surface of the printed circuit board body 103 under the elastic action of the telescopic component 3, so that during the rotation of the pushing ring 903, the conical rod 904 will reciprocate against the pushing rod 905, so that under the mutual force and the guiding action of the telescopic component 3, the cleaning rod 804 will be pushed to move reciprocally on the surface of the printed circuit board body 103, so that the stubborn impurities attached to the surface of the printed circuit board body 103 can be cleaned, so that they can be easily taken out by the exhaust fan 806, thereby improving the cleaning quality and effect of the printed circuit board body 103.

Claims

1. A printed circuit board appearance quality inspection device, include: A testing box (101) and a printed circuit board body (103), wherein the testing box (101) is provided with a conveyor belt (102) for testing and conveying the printed circuit board body (103); It is characterized by further comprising: A detection mechanism (2) disposed in the detection box (101) and used for detecting the printed circuit board body (103); The detection mechanism (2) comprises a first fixed plate (201) fixedly connected to the detection box (101); a side of the first fixed plate (201) close to the conveyor belt (102) is connected to a first L-shaped plate (202) via a moving assembly (7); an end of the first L-shaped plate (202) away from the first fixed plate (201) is connected to a first U-shaped plate (203) via a rotating assembly (4); the first U-shaped plate (203) is provided with an image sensor (204); two sides of the first U-shaped plate (203) close to the conveyor belt (102) are rotatably connected to a plurality of rotating balls (205); a grasping robot (206) for grasping a printed circuit board body (103) is provided in the detection box (101); and the first U-shaped plate (203) is provided with a cleaning mechanism (8) for cleaning the printed circuit board body (103).

2. A printed circuit board appearance quality inspection device according to claim 1, Features: The rotating assembly (4) is rotatably connected to a second U-shaped plate (401) at one end of the first L-shaped plate (202) close to the first U-shaped plate (203); the second U-shaped plate (401) is connected to the first L-shaped plate (202) via a rotating shaft (402); the second U-shaped plate (401) is provided with a telescopic assembly (3) for telescoping the first U-shaped plate (203); and the first L-shaped plate (202) is provided with a first driving assembly (5) for driving the second U-shaped plate (401).

3. A printed circuit board appearance quality inspection device according to claim 2, Features: The telescopic assembly (3) comprises two telescopic tubes (301) fixedly connected to a side of the first U-shaped plate (203) close to the second U-shaped plate (401) and symmetrically arranged with each other, the two telescopic tubes (301) being slidably connected with telescopic rods (302), one end of the two telescopic rods (302) being connected to the second U-shaped plate (401), the side walls of the two telescopic tubes (301) being sleeved with first springs (303), and the two ends of the two first springs (303) being respectively connected to the first U-shaped plate (203) and the second U-shaped plate (401).

4. A printed circuit board appearance quality inspection device according to claim 2, Features: The first driving assembly (5) comprises a second fixed plate (501) fixedly connected to a side wall of the first L-shaped plate (202); the second fixed plate (501) is connected to a rack (502) via a reset assembly (6); an end of the rotating shaft (402) close to the rack (502) is fixedly connected to a gear (503); the gear (503) and the rack (502) are arranged in meshing relationship with each other; a side of the rack (502) close to the first fixed plate (201) is fixedly connected to a driving rod (505); an end of the first fixed plate (201) away from a bottom wall of the detection box (101) is fixedly connected to a second L-shaped plate (506); the second L-shaped plate (506) and the driving rod (505) are arranged opposite to each other.

5. A printed circuit board appearance quality inspection device according to claim 4, Features: The reset assembly (6) comprises two T-shaped rods (601) fixedly connected to a side of the second fixed plate (501) close to the rack (502), the side walls of the two T-shaped rods (601) being slidably connected to the reset plates (602), the opposite ends of the two reset plates (602) being connected to the rack (502), the side walls of the two T-shaped rods (601) being sleeved with second springs (603), the two ends of the two second springs (603) being respectively connected to the side walls of the T-shaped rods (601) and the rack (502).

6. A printed circuit board appearance quality inspection device according to claim 1, Features: The moving assembly (7) comprises two moving tubes (701) fixedly connected to a first fixed plate (201) on a side close to the first L-shaped plate (202) and arranged symmetrically with each other, one of the two moving tubes (701) being slidably connected to a moving rod (702), one end of the moving rod (702) being connected to the first L-shaped plate (202), the other of the two moving tubes (701) being threadedly connected to a threaded rod (703), a motor (704) being provided on a side of the first L-shaped plate (202) away from the first fixed plate (201), the output end of the motor (704) being connected to the threaded rod (703).

7. A printed circuit board appearance quality inspection device according to claim 1, Features: The cleaning mechanism (8) comprises a third fixed plate (801) fixedly connected to one side of the first U-shaped plate (203); a cleaning box (802) is fixedly connected to the other side of the third fixed plate (801); the cleaning box (802) is connected to a sliding plate (803) via a telescopic assembly (3); a plurality of cleaning rods (804) are provided on a side of the sliding plate (803) close to the conveyor belt (102); the cleaning box (802) is provided with a pushing assembly (9) for pushing each cleaning rod (804); a cleaning pipe (805) is provided on one side of the cleaning box (802); and a suction fan (806) is provided on a side wall of the cleaning pipe (805).

8. A printed circuit board appearance quality inspection device according to claim 7, Features: The sliding plate (803) is provided with a plurality of cleaning holes (807), and each of the cleaning holes (807) and the cleaning rods (804) are arranged in a staggered manner.

9. A printed circuit board appearance quality inspection device according to claim 7, Features: The pushing assembly (9) comprises a connecting plate (901) fixedly connected to one side of the cleaning box (802); the connecting plate (901) is rotatably connected to a rotating rod (902); one end of the rotating rod (902) close to the conveyor belt (102) is fixedly connected to a pushing ring (903); a plurality of conical rods (904) are fixedly connected to the side wall of the pushing ring (903); a pushing rod (905) is slidably connected to one side of the cleaning box (802) close to the pushing ring (903); one end of the pushing rod (905) is connected to the sliding plate (803); and the cleaning tube (805) is provided with a second driving assembly (10) for driving the pushing ring (903).

10. A printed circuit board appearance quality inspection device according to claim 9, Features: The second driving assembly (10) comprises a driving box (1001) fixedly connected to the side wall of the cleaning tube (805); one end of the rotating rod (902) away from the pushing ring (903) is located in the driving box (1001) and is fixedly connected to a plurality of driving blades (1002); the rotating rod (902) and the cleaning tube (805) are eccentrically arranged.

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