A visual detection-based pen tip quality inspection device

Abstract

The application discloses a pen point quality inspection device based on visual inspection and relates to the technical field of visual inspection equipment. The device comprises a support and a ring support. The support is connected with a chain belt. Each chain plate of the chain belt is rotationally connected with a rotating rotating strip. One end of the rotating strip is connected with a sliding strip. Two pairs of cameras are installed on the support. The ring support is connected with a rotating rotating ring. The support is connected with a material control pipe. The material control pipe is slidably connected with a movable pressing rod. The pen point is conveyed by the chain belt, photographed by the cameras, and detected in appearance by visual identification. The pen point is driven to roll towards the rotating strip, so that the back of the pen point is rotated upwards, the pen point is subjected to no-corner visual inspection, the pen point end portion in the material control pipe is pressed by the pressing rod, the compression resistance of the pen point is detected, the rotating ring is rotated, the pen point is dropped onto the sliding strip again, and visual inspection is performed again. Manual sampling detection is not needed, and the operation is convenient.

Description

Technical Field

[0002] This invention relates to the field of visual inspection equipment technology, and in particular to a pen tip quality inspection device based on visual inspection. Background Technology

[0004] Pen tip visual inspection is an automated quality inspection solution based on industrial cameras and image processing technology. It is mainly used for appearance and size control of various pens in the production process. Its core is to replace the human eye with an industrial camera, capture pen tip details through high-precision lenses and special light sources, and then analyze them in real time through software algorithms to accurately identify minute defects such as pen tip skew, black spots, burrs, and concentricity deviation.

[0005] However, in practical applications, traditional visual inspection technologies still have some problems:

[0006] 1. Current visual inspection of marker pen tips typically uses multiple cameras to capture images from multiple angles above. However, the pen tip remains stationary during transport, and the bottom area is in the camera's blind spot, making it difficult to detect bottom defects and affecting product quality control.

[0007] 2. Traditional conveying mechanisms do not have sampling inspection capabilities and can usually only perform a one-time inspection of all items, lacking a mechanism for reviewing and statistically sampling the inspection results;

[0008] 3. Existing testing devices have limited functionality. The pressure resistance of the pen tip needs to be tested separately, and the pen tip dent needs to be observed during the pressure resistance test to determine the quality. They lack a collaborative mechanism with the vision inspection system, making integrated testing impossible. Summary of the Invention

[0010] The purpose of this invention is to address the shortcomings of existing technologies by proposing a vision-based pen tip quality inspection device that facilitates pen tip rotation for comprehensive inspection, enables sampling verification, and can be used in conjunction with pressure resistance testing.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A pen tip quality inspection device based on visual inspection includes a bracket and a ring frame. A detection mechanism is connected to the bracket. The detection mechanism includes sprockets. A pair of rotating sprockets are rotatably connected to the top of the bracket. A chain belt meshes between the pair of sprockets. A rotating rotating bar is rotatably connected to each chain plate of the chain belt. A sliding bar is connected to one end of the rotating bar. Two pairs of cameras are mounted on the bracket.

[0013] A return mechanism is connected to the ring frame. The return mechanism includes a rotating ring. A rotating ring is connected to the ring frame. The rotating ring is inclined. The top end of the chain plate belt moves through the rotating ring. The rotating ring is provided with multiple placement slots. A guide tube is connected to the bracket. The guide tube is slide-shaped. The guide tube is mounted above the inclined top end of the rotating ring. The bottom end of the guide tube faces the top of the sliding bar. A second blowpipe facing the top of the guide tube is connected to the bracket.

[0014] The support is connected to a material control tube, which is located on one side of the chain belt and is mounted above the inclined bottom end of the rotating ring. A movable pressure rod is slidably connected to the material control tube.

[0015] Preferably, a pair of end plates are installed on both sides of the bracket, and the same guide plate is installed between each pair of end plates on the same side. The pair of guide plates are respectively connected to the two sides of the top of the chain belt. The guide plate and the end plate are slidably connected to the chain belt, and a controller is installed on one of the guide plates.

[0016] Preferably, a support rod is fixedly connected to the bottom end of the sliding bar, the support rod movably passes through the chain plate of the chain belt, a guide wheel is installed at the bottom end of the support rod, a second electric push rod is installed on the bracket, a second push plate is installed at the telescopic end of the second electric push rod, the top two ends of the second push plate are arc-shaped, the top end of the second push plate is used to roll against the guide wheel, a torsion spring is installed between the rotating bar and the chain plate of the chain belt, and a second infrared sensor is installed on one of the guide plates located at the second push plate, the infrared emitting end of the second infrared sensor is located above the rotating bar.

[0017] Preferably, the sliding bar is slidably connected to the rotating bar, a screw is rotatably connected to the sliding bar, the screw is threadedly connected to the rotating bar, the chain plate is provided with a scale bar, the two pairs of cameras are respectively distributed at both ends of the second push plate, the bracket is equipped with a light at each camera, and the sliding bar and the rotating bar are both provided with grooves.

[0018] Preferably, a drive mechanism is connected to the bracket, the drive mechanism includes a second motor, the second motor is mounted on the bracket, and the output shaft of the second motor and the shaft end of one of the sprockets are keyed to pulleys, and a toothed belt is wound between the pair of pulleys.

[0019] Preferably, the conduit is mounted on a guide plate, the conduit is connected to the bracket through the guide plate, a fixed cylinder is connected to the bottom end of the conduit, a flexible tube is installed between the conduit and the fixed cylinder, a fixed block is mounted on one of the guide plates, a movable block is slidably connected to the fixed block, a knob is rotatably connected to the fixed block, the threaded end of the knob is threadedly connected to the movable block, and the movable block is fixedly connected to the fixed cylinder.

[0020] Preferably, an inclined feed pipe is installed on one side of the conduit, a third infrared sensor is installed on the side wall of the conduit below the feed pipe connection, the fixed cylinder is located above the sliding bar, and a second solenoid valve is installed on the second blowpipe.

[0021] Preferably, an annular guide rail is installed at the bottom of the rotating ring, a slider is slidably connected to the guide rail, the slider is installed on the ring frame, a first gear is keyed to the rotating ring, a first motor is installed on the bracket, a second gear is keyed to the output shaft of the first motor, and the first gear and the second gear mesh.

[0022] Preferably, a third electric push rod is installed on the material control tube, the telescopic rod of the third electric push rod is connected to the pressure rod, a pressure sensor is installed between the telescopic rod of the third electric push rod and the pressure rod, a communicating side tube is installed on the side wall of the material control tube, the side tube is mounted above the inclined bottom end of the rotating ring, a third blow pipe is installed on the bracket at the material control tube, a third solenoid valve is installed on the third blow pipe, a fourth blow pipe is installed on the side wall of the material control tube, a fourth solenoid valve is installed on the fourth blow pipe, a fourth infrared sensor is installed on one of the guide plates at the material control tube, the infrared emitting end of the fourth infrared sensor is located above the rotating bar, a fourth electric push rod is installed on the bracket at the material control tube, a third push plate is installed on the telescopic end of the fourth electric push rod, and the top end of the third push plate is used to roll against the guide wheel.

[0023] Preferably, a waste pipe is installed at the end of the bracket opposite to the second blowpipe, a first electric push rod is installed at the end of the bracket located on the waste pipe, a first push plate is installed at the telescopic end of the first electric push rod, a first infrared sensor is installed at one of the guide plates located on the waste pipe, the infrared emitting end of the first infrared sensor is located above the rotating bar, a first blowpipe is installed at the bracket located on the waste pipe, and a first solenoid valve is installed on the first blowpipe.

[0024] Compared with the prior art, the present invention provides a pen tip quality inspection device based on visual inspection, which has the following beneficial effects:

[0025] 1. This vision-based pen tip quality inspection device conveys pen tips via a chain conveyor and captures images via a camera. Visual recognition is used to inspect the appearance of the pen tips. When the pen tip passes the first pair of cameras, a visual inspection of the top of the pen tip is completed. As the pen tip moves with the sliding bar to the second push plate, the guide wheel contacts the second push plate, causing it to roll. The top of the second push plate is higher than the initial position of the guide wheel, pushing it upwards. This causes the support rod to swing upwards, which in turn causes the sliding bar and rotating bar to swing upwards. The torsion spring is compressed, and when the sliding bar and rotating bar tilt, the pen tip on the sliding bar rolls towards the rotating bar, causing the back of the pen tip to rotate upwards. This allows the second pair of cameras to capture images of the flipped-up back of the pen tip, thus completing the visual inspection of the back of the pen tip and achieving a comprehensive visual inspection of the pen tip.

[0026] 2. This vision-based pen tip quality inspection device, when sampling pen tips being transported, allows the pen tips to be sampled to enter the control tube, activates the third electric push rod, and the third electric push rod retracts. Through the pressure sensor, the pressure rod pulls the pressure rod, which squeezes the end of the pen tip in the control tube. The pressure sensor measures the pressure resistance, thus detecting the pen tip's compressive strength and achieving diverse detection functions.

[0027] 3. This vision-based pen tip quality inspection device causes the tested pen tips in the control tube to fall into the side tube and then into the placement slot on the rotating ring. The rotating ring is driven to rotate, causing the pen tips inside the placement slot to move to the guide tube. Compressed gas is blown out from the second blowpipe, and the pen tips inside the placement slot are blown into the guide tube and fall onto the sliding bar again. The camera performs a visual inspection again, and the unqualified ones are rejected. There is no need for manual sampling inspection and verification, and the operation is convenient. Attached Figure Description

[0029] Figure 1 This is a three-dimensional view of a pen tip quality inspection device based on visual inspection proposed in this invention;

[0030] Figure 2 This is a view of the end plate connection structure of the present invention;

[0031] Figure 3 This is a view of the waste pipe connection structure of the present invention;

[0032] Figure 4 This is a view of the slider connection structure of the present invention;

[0033] Figure 5 This is a view of the second blowpipe connection structure of the present invention;

[0034] Figure 6 This is a view of the movable block connection structure of the present invention;

[0035] Figure 7 This is a view of the rotating connection structure of the present invention;

[0036] Figure 8 This is a view of the pressure bar connection structure of the present invention;

[0037] Figure 9 This is a view of the bracket connection structure of the present invention;

[0038] Figure 10 This is a view of the chain plate belt connection structure of the present invention;

[0039] Figure 11 This is a view of the first push plate connection structure of the present invention;

[0040] Figure 12 This is a view of the slider connection structure of the present invention;

[0041] Figure 13 This is a view of the strut connection structure of the present invention.

[0042] In the diagram: 1. Bracket; 2. Detection mechanism; 21. Chain plate; 22. End plate; 23. Guide plate; 24. Camera; 25. Lighting lamp; 26. Sprocket; 27. Waste pipe; 28. First infrared sensor; 29. ​​First blowpipe; 210. First solenoid valve; 211. Rotating bar; 212. Sliding bar; 213. Screw; 214. Support rod; 215. Guide wheel; 216. First push plate; 217. First electric push rod; 218. Torsion spring; 219. Groove; 220. Second electric push rod; 221. Second push plate; 222. Second infrared sensor; 223. Scale bar; 3. Return mechanism; 31. Ring frame; 32. Placement slot; 33. Rotary ring; 34. First gear; 35. Second blowpipe; 36. 37. Second solenoid valve; 38. Guide tube; 39. First motor; 30. Second gear; 310. Feed pipe; 311. Fixed cylinder; 312. Hose; 313. Third infrared sensor; 314. Guide rail; 315. Slider; 316. Knob; 317. Fixed block; 318. Moving block; 319. Control pipe; 320. Pressure sensor; 321. Side pipe; 322. Pressure rod; 323. Third electric push rod; 324. Third blowpipe; 325. Fourth infrared sensor; 326. Third solenoid valve; 327. Fourth electric push rod; 328. Third push plate; 329. Fourth blowpipe; 330. Fourth solenoid valve; 4. Controller; 5. Drive mechanism; 51. Pulley; 52. Toothed belt; 53. Second motor. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Example 1: Refer to Figures 1-13 A pen tip quality inspection device based on visual inspection includes a bracket 1 and a ring frame 31. An inspection mechanism 2 is connected to the bracket 1. The inspection mechanism 2 includes sprockets 26. A pair of rotating sprockets 26 are rotatably connected to the top of the bracket 1. A chain plate belt 21 meshes between the pair of sprockets 26. A rotating rotating bar 211 is rotatably connected to each chain plate of the chain plate belt 21. A sliding bar 212 is connected to one end of the rotating bar 211. The pen tip is flipped by the rotation of the rotating bar 211 and the sliding bar 212, and the pen tip is visually inspected from all directions. Two pairs of cameras 24 are installed on the bracket 1 to perform visual inspection of the pen tip.

[0047] In this invention, a pair of end plates 22 are installed on both sides of the bracket 1. A guide plate 23 is installed between each pair of end plates 22 on the same side. The pair of guide plates 23 are respectively connected to the two sides of the top of the chain belt 21. The guide plate 23 and the end plate 22 are slidably connected to the chain belt 21. The end plate 22 and the guide plate 23 ensure the stable movement of the chain belt 21 and prevent the chain belt 21 from sinking due to lack of support. A controller 4 is installed on one of the guide plates 23. The controller 4 is electrically connected to each component to work together and ensure the stable operation of the device. The controller 4 is connected to an external power supply.

[0048] In this invention, a support rod 214 is fixedly connected to the bottom end of the sliding bar 212. The support rod 214 movably passes through the chain plate of the chain belt 21. A guide wheel 215 is installed at the bottom end of the support rod 214. A second electric push rod 220 is installed on the bracket 1. A second push plate 221 is installed at the telescopic end of the second electric push rod 220. The top two ends of the second push plate 221 are arc-shaped. The top end of the second push plate 221 is used to roll against the guide wheel 215. A torsion spring 218 is installed between the rotating bar 211 and the chain plate of the chain belt 21. The guide wheel 215 is raised by the second push plate 221, thereby raising the support rod 214 and causing the rotating bar 211 and the sliding bar 212 to swing upward. A second infrared sensor 222 is installed on one of the guide plates 23 located at the second push plate 221. The infrared emitting end of the second infrared sensor 222 is located above the rotating bar 211, thereby detecting whether the pen tip has completed the flipping and rolling above the rotating bar 211.

[0049] In this invention, a sliding bar 212 is slidably connected to a rotating bar 211, and a screw 213 is rotatably connected to the sliding bar 212. The screw 213 is threadedly connected to the rotating bar 211. A scale bar 223 is provided on the chain plate belt 21. Two pairs of cameras 24 are respectively distributed at both ends of the second push plate 221. An illumination lamp 25 is installed at each camera 24 on the bracket 1. Both the sliding bar 212 and the rotating bar 211 are provided with grooves 219. When the screw 213 is rotated, the position of the sliding bar 212 is adjusted so that the sliding bar 212 slides on the rotating bar 211. The distance between the two grooves 219 is adjusted. Different models of pen tips have different circumferences. The rolling distance of the pen tip is adjusted to adapt to different models of pen tips. The illumination lamp 25 provides illumination to improve the recognition of the camera 24.

[0050] In this invention, a drive mechanism 5 is connected to the bracket 1. The drive mechanism 5 includes a second motor 53. The second motor 53 is mounted on the bracket 1. The output shaft of the second motor 53 and the shaft end of one of the sprockets 26 are both keyed to pulleys 51. A toothed belt 52 is engaged between a pair of pulleys 51 to facilitate the movement of the chain plate belt 21.

[0051] In this invention, a waste pipe 27 is installed at the end of the bracket 1 opposite to the second blowpipe 35. A first electric push rod 217 is installed at the end of the bracket 1 located on the waste pipe 27. A first push plate 216 is installed at the telescopic end of the first electric push rod 217. A first infrared sensor 28 is installed at the waste pipe 27 on one of the guide plates 23. The infrared emitting end of the first infrared sensor 28 is located above the rotating bar 211. A first blowpipe 29 is installed at the waste pipe 27 on the bracket 1. A first solenoid valve 210 is installed on the first blowpipe 29. When the first solenoid valve 210 is opened, the first blowpipe 29 blows out compressed gas, blowing the pen tip into the waste pipe 27. The sliding bar 212 and the rotating bar 211 swing upward and tilt, which facilitates the pen tip to be blown away and discharged, and facilitates centralized processing.

[0052] Example 2: Based on Example 1, a pen tip quality inspection device based on visual inspection is provided. A return mechanism 3 is connected to a ring frame 31. The return mechanism 3 includes a rotating ring 33. The rotating ring 33 is connected to the ring frame 31. The rotating ring 33 is inclined. The top end of the chain plate belt 21 moves through the rotating ring 33. The rotating ring 33 is provided with multiple placement slots 32. A guide tube 37 is connected to the bracket 1. The guide tube 37 is in the shape of a slide. The guide tube 37 is mounted above the inclined top end of the rotating ring 33. The bottom end of the guide tube 37 faces the top of the sliding bar 212. A second blowpipe 35 facing the top of the guide tube 37 is connected to the bracket 1. The rotating ring 33 carries the pen tip that needs to be inspected again or the sampling pen tip through the placement slot 32 and sends it back to the chain plate belt 21 for visual inspection again.

[0053] In this invention, a connected inclined feed pipe 310 is installed on one side of the conduit 37. The inclined feed pipe 310 is used to connect to the pen tip feeder, which facilitates the continuous feeding of pen tips onto the chain belt 21. A third infrared sensor 313 is installed on the side wall of the conduit 37 below the feed pipe 310. The third infrared sensor 313 is used for material feeding identification. The fixed cylinder 311 is located above the sliding bar 212. A second solenoid valve 36 is installed on the second blow pipe 35. When the second solenoid valve 36 is opened, the second blow pipe 35 blows out compressed gas, which blows the pen tips inside the placement groove 32 into the conduit 37.

[0054] In this invention, a ring-shaped guide rail 314 is installed at the bottom of the rotating ring 33, and a slider 315 is slidably connected to the guide rail 314. The slider 315 is installed on the ring frame 31. A first gear 34 is keyed to the rotating ring 33. A first motor 38 is installed on the bracket 1. A second gear 39 is keyed to the output shaft of the first motor 38. The first gear 34 and the second gear 39 mesh to facilitate the stable rotation of the ring frame 31.

[0055] In this invention, the conduit 37 is installed on the guide plate 23 and connected to the bracket 1 through the guide plate 23. The bottom end of the conduit 37 is connected to the fixing cylinder 311, and a flexible tube 312 is installed between the conduit 37 and the fixing cylinder 311. A fixing block 317 is installed on one of the guide plates 23, and a moving block 318 is slidably connected to the fixing block 317. A knob 316 is rotatably connected to the fixing block 317, and the threaded end of the knob 316 is threadedly connected to the moving block 318. The moving block 318 is fixedly connected to the fixing cylinder 311. After adjusting the position of the sliding bar 212, the position of the fixing cylinder 311 is adjusted so that the fixing cylinder 311 is aligned with the groove 219 on the sliding bar 212 to prevent the pen tip from deviating.

[0056] Example 3: Based on Example 2, a pen tip quality inspection device based on visual inspection is provided. A control tube 319 is connected to the bracket 1. The control tube 319 is located on one side of the chain belt 21 and is mounted above the inclined bottom end of the rotating ring 33. A movable pressure rod 322 is slidably connected to the control tube 319. The pen tip end is squeezed by the pressure rod 322 to perform a pressure resistance test on the pen tip. After the test is completed, the pen tip is sent back to the chain belt 21 for visual inspection again to observe the deformation after the pressure resistance test.

[0057] In this invention, a third electric push rod 323 is installed on the material control tube 319. The telescopic rod of the third electric push rod 323 is connected to the pressure rod 322. A pressure sensor 320 is installed between the telescopic rod of the third electric push rod 323 and the pressure rod 322 to detect the compressive strength. A connecting side tube 321 is installed on the side wall of the material control tube 319. The side tube 321 is mounted above the inclined bottom end of the rotating ring 33. A third blow pipe 324 is installed on the bracket 1 at the material control tube 319. A third solenoid valve 326 is installed on the third blow pipe 324. A connecting fourth blow pipe 329 is installed on the side wall of the material control tube 319. A fourth solenoid valve 330 is installed on the fourth blow pipe 329. One of the guide plates 23 is located at the material control tube 319 and is equipped with a fourth infrared sensor 325. The infrared emitting end of the fourth infrared sensor 325 is located above the rotating bar 211. The bracket 1 is located at the material control tube 319 and is equipped with a fourth electric push rod 327. The telescopic end of the fourth electric push rod 327 is equipped with a third push plate 328. The top of the third push plate 328 is used to roll against the guide wheel 215. The position of the pen tip is determined by the fourth infrared sensor 325, and the third push plate 328 is controlled to make the sliding bar 212 and the rotating bar 211 swing upward. Compressed gas is blown out through the fourth blow pipe 329 to send the pen tip into the material control tube 319 and drop it onto the rotating ring 33 through the side pipe 321.

[0058] Working principle: The pen tips are fed one by one into the feed pipe 310 by an external feeder. The pen tips roll in the feed pipe 310 and are precisely placed onto the sliding bar 212 below through the hose 312 and the fixed cylinder 311. The bottom of the pen tip enters the groove 219 on the sliding bar 212. The groove 219 is used to limit the pen tip and prevent it from rolling randomly on the sliding bar 212. During the fall of the pen tip, the third infrared sensor 313 identifies and counts the pen tips. With the cooperation of the controller 4, the second motor 53 is controlled to work. Under the action of a pair of pulleys 51 and toothed belt 52, one of the sprockets 26 is driven to rotate. Through the connection of the chain plate belt 21, the other sprocket 26 is driven to rotate and the chain plate belt 21 moves. The second motor 53 is a stepper motor. The second motor 53 is controlled to rotate precisely, ensuring that each pen tip is accurately placed onto the sliding bar 212 during its descent. The pen tips are transported via the chain belt 21, illuminated by the lighting lamp 25, and captured by the camera 24. The appearance of the pen tips is inspected using visual recognition. When a pen tip passes the first pair of cameras 24, a visual inspection of the top of the pen tip is completed. When the pen tip moves with the sliding bar 212 to the second push plate 221, the guide wheel 215 will come into contact with the second push plate 221 and roll on it. The top of the second push plate 221 is higher than the initial position of the guide wheel 215, thus pushing the guide wheel 215 upward, causing the support rod 214 to swing upward, which in turn drives the sliding bar 212 and the rotating bar 211. As the pen tip swings upward, the torsion spring 218 is compressed. When the sliding bar 212 and the rotating bar 211 tilt, the pen tip on the sliding bar 212 rolls towards the rotating bar 211, causing the back of the pen tip to rotate upward. This allows the second pair of cameras 24 to capture images of the pen tip's flipped-up back, thus completing the visual inspection of the pen tip's back and achieving a blind-spot-free visual inspection. Qualified pen tips fall from the end of the chain belt 21. For unqualified pen tips, when they reach the waste pipe 27, the first infrared sensor 28 identifies their position and activates the first electric push rod 217, pushing the first push plate 216 upward. This causes the sliding bar 212 and the rotating bar 211 to swing and tilt upward. The first blowpipe 29 is connected to an external air source, activating the first solenoid valve 210. Compressed gas is blown outwards onto defective pen tips, causing them to detach from groove 219 and enter waste pipe 27 for discharge, thus completing waste separation. The end of screw 213 has a hexagonal groove. For different pen tips, the screw 213 is rotated with a wrench, and the position of sliding bar 212 is adjusted according to scale bar 223 to adjust the distance between a pair of grooves 219, ensuring the distance is sufficient for the pen tip to roll and flip, allowing the back of the pen tip to face upwards. Rotating knob 316 drives moving block 318 to slide along fixed block 317, moving fixed cylinder 311 above groove 219 of sliding bar 212, ensuring alignment of fixed cylinder 311. The second electric push rod 220 is then activated, pushing the second push plate 221 upwards.Adjusting the angles of the sliding bar 212 and the rotating bar 211 allows the pen tip to disengage from the groove 219, completing the rolling and flipping motion. The second infrared sensor 222 determines whether the pen tip has rolled onto the rotating bar 211, thereby automatically adjusting the height of the second push plate 221.

[0059] When sampling the pen tips being transported, when the pen tip moves to the control tube 319, the position is determined by the fourth infrared sensor 325, the fourth electric push rod 327 is activated, the third push plate 328 moves upward, pushing the sliding bar 212 and the rotating bar 211 to swing upward, the third solenoid valve 326 is activated, the third blow pipe 324 is connected to an external air source, the third blow pipe 324 blows out compressed gas, so that the pen tip to be sampled enters the control tube 319, the third electric push rod 323 is activated, the third electric push rod 323 retracts, and the pressure rod 322 is pulled by the pressure sensor 320. The pressure rod 322 squeezes the end of the pen tip in the control tube 319, and the pressure sensor 320 measures the pressure resistance to test the pen tip's compressive strength.

[0060] The fourth solenoid valve 330 is activated, and the fourth blowpipe 329 is connected to an external air source. The fourth blowpipe 329 blows compressed gas outward, causing the tested pen tips in the control tube 319 to be blown into the side tube 321 and fall into the placement slot 32 on the rotating ring 33. The first motor 38 is activated, driving the second gear 39 to rotate, which in turn drives the first gear 34 to rotate, thereby driving the rotating ring 33 to rotate. The guide rail 314 and slider 315 are used to ensure the stable rotation of the rotating ring 33, so that the pen tips inside the placement slot 32 move to the guide tube 37. The second solenoid valve 36 is activated, and the second blowpipe 35 is connected to an external air source. The second blowpipe 35 blows compressed gas, and the pen tips inside the placement slot 32 are blown into the guide tube 37 and fall onto the sliding bar 212 again. The camera 24 performs visual inspection again, and unqualified ones are rejected. No manual sampling inspection is required, making the operation convenient.

[0061] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pen tip quality inspection device based on visual inspection, comprising a support (1) and a ring frame (31), characterized in that: The bracket (1) is connected to a detection mechanism (2), which includes a sprocket (26). A pair of rotating sprockets (26) are rotatably connected to the top of the bracket (1). A chain plate belt (21) meshes between the pair of sprockets (26). A rotating rotating bar (211) is rotatably connected to each chain plate of the chain plate belt (21). A sliding bar (212) is connected to one end of the rotating bar (211). Two pairs of cameras (24) are installed on the bracket (1). A return mechanism (3) is connected to the ring frame (31). The return mechanism (3) includes a rotating ring (33). A rotating ring (33) is connected to the ring frame (31). The rotating ring (33) is inclined. The top end of the chain plate belt (21) moves through the rotating ring (33). The rotating ring (33) is provided with multiple placement slots (32). A guide tube (37) is connected to the support (1). The guide tube (37) is in the shape of a slide. The guide tube (37) is mounted above the inclined top end of the rotating ring (33). The bottom end of the guide tube (37) faces the top of the sliding bar (212). A second blowpipe (35) facing the top of the guide tube (37) is connected to the support (1). The support (1) is connected to a control tube (319), which is located on one side of the chain belt (21). The control tube (319) is mounted above the inclined bottom end of the swivel (33), and a movable pressure rod (322) is slidably connected to the control tube (319).

2. The pen tip quality inspection device based on visual inspection according to claim 1, characterized in that, A pair of end plates (22) are installed on both sides of the bracket (1). A guide plate (23) is installed between each pair of end plates (22) on the same side. A pair of guide plates (23) are respectively connected to the two sides of the top of the chain belt (21). The guide plate (23) and the end plate (22) are slidably connected to the chain belt (21). A controller (4) is installed on one of the guide plates (23).

3. The pen tip quality inspection device based on visual inspection according to claim 2, characterized in that, The bottom end of the sliding bar (212) is fixedly connected to a support rod (214), the support rod (214) moves through the chain plate of the chain belt (21), the bottom end of the support rod (214) is equipped with a guide wheel (215), the bracket (1) is equipped with a second electric push rod (220), the telescopic end of the second electric push rod (220) is equipped with a second push plate (221), the top two ends of the second push plate (221) are arc-shaped, the top end of the second push plate (221) is used to roll against the guide wheel (215), a torsion spring (218) is installed between the rotating bar (211) and the chain plate of the chain belt (21), one of the guide plates (23) is located at the second push plate (221) and a second infrared sensor (222) is installed, the infrared emitting end of the second infrared sensor (222) is located above the rotating bar (211).

4. The pen tip quality inspection device based on visual inspection according to claim 1, characterized in that, The sliding bar (212) is slidably connected to the rotating bar (211). A screw (213) is rotatably connected to the sliding bar (212). The screw (213) is threadedly connected to the rotating bar (211). The chain plate (21) is provided with a scale bar (223). The two pairs of cameras (24) are respectively distributed at both ends of the second push plate (221). The bracket (1) is equipped with a lighting lamp (25) at each camera (24). The sliding bar (212) and the rotating bar (211) are both provided with grooves (219).

5. A pen tip quality inspection device based on visual inspection according to claim 1, characterized in that, The bracket (1) is connected to a drive mechanism (5), which includes a second motor (53). The bracket (1) is equipped with a second motor (53). The output shaft of the second motor (53) and the shaft end of one of the sprockets (26) are both keyed to pulleys (51). A toothed belt (52) is engaged between a pair of pulleys (51).

6. A pen tip quality inspection device based on visual inspection according to claim 2, characterized in that, The conduit (37) is installed on the guide plate (23). The conduit (37) is connected to the bracket (1) through the guide plate (23). The bottom end of the conduit (37) is connected to the fixed cylinder (311). A flexible tube (312) is installed between the conduit (37) and the fixed cylinder (311). A fixed block (317) is installed on one of the guide plates (23). A movable block (318) is slidably connected to the fixed block (317). A knob (316) is rotatably connected to the fixed block (317). The threaded end of the knob (316) is threadedly connected to the movable block (318). The movable block (318) is fixedly connected to the fixed cylinder (311).

7. A pen tip quality inspection device based on visual inspection according to claim 6, characterized in that, An inclined feed pipe (310) is installed on one side of the conduit (37). A third infrared sensor (313) is installed on the side wall of the conduit (37) below the feed pipe (310). The fixed cylinder (311) is located above the sliding bar (212). A second solenoid valve (36) is installed on the second blow pipe (35).

8. A pen tip quality inspection device based on visual inspection according to claim 1, characterized in that, The bottom end of the rotating ring (33) is equipped with an annular guide rail (314), and a slider (315) is slidably connected on the guide rail (314). The slider (315) is mounted on the ring frame (31). A first gear (34) is keyed to the rotating ring (33). A first motor (38) is mounted on the bracket (1). A second gear (39) is keyed to the output shaft of the first motor (38). The first gear (34) and the second gear (39) mesh.

9. A pen tip quality inspection device based on visual inspection according to claim 2, characterized in that, A third electric push rod (323) is installed on the control tube (319). The telescopic rod of the third electric push rod (323) is connected to the pressure rod (322). A pressure sensor (320) is installed between the telescopic rod of the third electric push rod (323) and the pressure rod (322). A connecting side tube (321) is installed on the side wall of the control tube (319). The side tube (321) is mounted above the inclined bottom end of the rotating ring (33). A third blow pipe (324) is installed on the bracket (1) at the control tube (319). A third solenoid valve (326) is installed on the third blow pipe (324). The control tube ( 319) A fourth blowpipe (329) is installed on the side wall. A fourth solenoid valve (330) is installed on the fourth blowpipe (329). A fourth infrared sensor (325) is installed on one of the guide plates (23) at the material control tube (319). The infrared emitting end of the fourth infrared sensor (325) is located above the rotating bar (211). A fourth electric push rod (327) is installed on the bracket (1) at the material control tube (319). A third push plate (328) is installed on the telescopic end of the fourth electric push rod (327). The top of the third push plate (328) is used to roll against the guide wheel (215).

10. A pen tip quality inspection device based on visual inspection according to claim 2, characterized in that, The bracket (1) is equipped with a waste pipe (27) at one end away from the second blowpipe (35). The bracket (1) is equipped with a first electric push rod (217) at one end of the waste pipe (27). The telescopic end of the first electric push rod (217) is equipped with a first push plate (216). One of the guide plates (23) is equipped with a first infrared sensor (28) at the waste pipe (27). The infrared emitting end of the first infrared sensor (28) is located above the rotating bar (211). The bracket (1) is equipped with a first blowpipe (29) at the waste pipe (27). The first blowpipe (29) is equipped with a first solenoid valve (210).

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