An appearance detection device for syringe production

Abstract

This invention discloses an appearance inspection device for syringe production, relating to the field of syringe appearance inspection technology. It includes an inspection device, a transport device, a feeding conveyor belt, and a workbench. Before visual inspection, the inspection device pre-treats the syringes using electrostatic adsorption technology, utilizing electrostatic adsorption to attract fine impurities adhering to the syringe's outer wall. Simultaneously, an impurity cleaning station is provided to scrape off the adsorbed impurities, achieving automatic cleaning of the wiping roller and maintaining its continuous and effective adsorption capacity, thus improving the continuity and stability of equipment operation. Furthermore, during the syringe appearance visual inspection process, a stable airflow is generated through an airflow-driven structure. While rotating the syringe, an air film is formed around it, preventing re-contamination of the syringe during inspection while ensuring complete circumferential inspection, thereby improving the accuracy of defect identification and the reliability of appearance visual inspection.

Description

Technical Field

[0001] This invention relates to the field of syringe appearance inspection technology, specifically to an appearance inspection device for syringe production. Background Technology

[0002] As a commonly used medical device in the medical field, syringes typically require appearance inspection during the syringe production process to ensure that the product meets relevant quality standards. This includes inspecting the integrity of the syringe surface, the clarity of the scale, and defects in the outer wall. Existing syringe appearance inspection equipment usually adopts visual inspection methods, which use industrial cameras to capture images of the syringe surface and visually inspect for product appearance defects in order to achieve automated inspection.

[0003] However, during the production and transportation of syringes, fine impurities such as dust and fiber debris can easily adhere to the surface of the syringe. When a syringe with impurities enters the appearance inspection equipment, the foreign matter attached to the surface will obscure the product's own defect characteristics, making it difficult to accurately distinguish between syringe defects and external contamination. This can easily lead to false detections and missed detections, thus affecting the accuracy of the test results. Summary of the Invention

[0004] The purpose of this invention is to provide an appearance inspection device for syringe manufacturing, so as to solve the problem that external impurities on syringes affect the accuracy of appearance inspection results in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A workbench is included, a transport device is installed on the workbench, a feeding conveyor belt is installed on one side of the transport device, and a detection device is installed on the upper part of the transport device. The feeding conveyor belt is connected to a control system. During operation, the syringe is transported from the previous process to the transport device, which then transports the syringe to the detection device. The detection device performs visual inspection on the appearance of the syringe to check for defects. After inspection of the outer surface, the syringe is transported from the transport device to the feeding conveyor belt.

[0006] The inspection device includes a light shield and a dust removal component. The light shield is installed on the workbench and located above the conveyor device. The inspection component is installed on the inner wall of the light shield. An air jet component is installed on the conveyor device and connected to the control system. When the conveyor device transports the syringe to the dust removal component, the nozzle of the air jet component forms a tangential angle with the syringe, controlling the air jet component to spray a tangential airflow. The tangential airflow drives the syringe to rotate. The dust removal component removes impurities adhering to the outer circumferential wall of the syringe. The conveyor device transports the dust-removed syringe to the inspection component, where the inspection component performs visual inspection on the syringe. The inspected syringe is then transported to the unloading conveyor belt for the next process.

[0007] The dust removal assembly includes a lifting element mounted on the inner wall of a light shield. A scraping element is installed on the lifting element, and a wiping roller is rotatably mounted inside the lifting element. The wiping roller is located above the conveyor device, with the scraping element pressing against it. An internal cleaning element is installed on the wiping roller. The lifting element is controlled to move the wiping roller to the syringe, where it adsorbs impurities. When the wiping roller rotates to the scraping element, the scraping element removes the adsorbed impurities. The scraped impurities are then sucked away by the scraping element. The internal cleaning element removes impurities generated inside the wiping roller during long-term rotation, maintaining the stability of internal triboelectricity.

[0008] The detection assembly includes a circumferential detection element mounted on the inner wall of a light shield. A limiting element is installed on the transport device. When the syringe is transported to the circumferential detection element, the limiting element axially limits the syringe to prevent axial movement of the syringe during detection from affecting the accuracy of the detection. The circumferential detection element blows the syringe to rotate circumferentially and performs the detection.

[0009] The wiping roller includes a central shaft mounted on a lifting element. A friction block is mounted on the central shaft. A metal cavity is rotatably mounted on the outside of the central shaft. A friction ring is installed inside the metal cavity and abuts against the friction block. A first tip is mounted on the outside of the metal cavity. An insulating cylinder is sleeved on the outside of the metal cavity. A grid is mounted on the outside of the insulating cylinder. The surface of the grid has spiral grooves to increase the friction between the grid and the surface of the syringe.

[0010] Before the testing process, the wiping roller is rotated for a period of time to generate sufficient initial charge inside. When the syringe rotates, it drives the grid to rotate, which in turn drives the insulating cylinder to rotate. The insulating cylinder then drives the metal cavity to rotate, which in turn drives the friction ring to rotate. The friction ring and friction block rotate relative to each other, generating friction and causing charge transfer at the contact interface. The negative charge on the surface of the friction ring transfers the negative charge to the inner surface of the metal cavity. Like charges on the metal cavity repel each other, and the net charge automatically diffuses to the outermost surface of the conductor, eventually distributing evenly on the outer surface of the metal cavity. The insulating cylinder blocks the conduction current between the metal cavity and the grid, preventing the charge from flowing directly from the metal cavity to the grid and preventing the rapid loss of charge within the metal cavity. This allows the charge to remain on the metal cavity, thus generating a stable electric field. The grid, being a semi-conductive material, undergoes electrostatic induction under the electric field of the metal cavity, generating stable static electricity on its surface. This static electricity on the grid surface attracts fine impurities adhering to the outer wall of the syringe. Subsequent rotation of the syringe and the wiping roller will generate static electricity again, replenishing the charge inside the metal cavity.

[0011] The internal cleaning element includes axial fan blades mounted on a metal cavity. An air outlet and an air inlet are provided on the central shaft. A flow groove is provided inside the central shaft, which is connected to the air outlet and the air inlet. The air outlet is located inside the metal cavity. A vent is provided at one end of the metal cavity. A dust collection box is installed on one side of the metal cavity. The vent is connected to the dust collection box, which is connected to the air inlet. A filter plate is installed inside the air inlet.

[0012] When the metal cavity rotates, it drives the axial fan blades to rotate. The axial fan blades generate axial airflow inside the metal cavity, which blows the debris generated by the friction block and friction ring through the vents to the dust collection box. The debris is blocked by the filter plate and remains in the dust collection box. The airflow enters the flow channel from the air inlet, enters the air outlet from the flow channel, and then flows back into the metal cavity from the air outlet, forming an internal circulation clean airflow. This prevents external gas from entering the metal cavity and avoids the debris generated by friction from adhering to the friction surface, thus maintaining a stable output of triboelectric charge.

[0013] The lifting element includes side plates mounted on the inner wall of the light shield. A connecting plate is installed between the two side plates, and a first driving component is mounted on the connecting plate. A sliding groove is provided on the side plates, and an L-shaped plate is slidably mounted within the sliding groove. The L-shaped plate is mounted on the first driving component, and a central shaft rotates on the L-shaped plate. A second tip is mounted on the L-shaped plate, and the first and second tips are on the same axis. The first driving component is connected to a control system. The first driving component is a first cylinder. When the syringe is transported to below the wiping roller, the cylinder rod of the first cylinder extends, causing the first cylinder to move the L-shaped plate away from the connecting plate within the sliding groove. The L-shaped plate then moves the wiping roller away from the connecting plate until the wiping roller reaches the surface of the syringe. After cleaning, the cylinder rod of the first cylinder retracts, resetting the wiping roller.

[0014] The scraping element includes a grounding brush, which is mounted on an L-shaped plate. One end of the grounding brush rests against the grid. A dust collection box is mounted on one side of the grounding brush. A dust collection hole is installed at the bottom of the dust collection box. A dust scraper is mounted on one side of the dust collection box, with one end of the dust scraper resting against the grid. The dust collection box and the dust scraper are mounted on the L-shaped plate, and the dust collection box is connected to the control system. When the grid bar rotates to the grounding brush, it contacts the grounding brush. The induced charge on the surface of the grid bar is conducted to the ground through the grounding brush, weakening the electrostatic adsorption force of the grid bar. Since the grid bars on the insulating cylinder are separate, only the induced charge on the grid bar in contact with the grounding brush is conducted to the ground, while the other grid bars will still carry a charge. At the same time, since the grid bar and the metal cavity are separated by the insulating cylinder, the grounding brush only conducts the induced charge on the grid bar, not the charge on the metal cavity. The dust scraper scrapes the impurities off the surface of the grid bar, controls the dust collection box to generate negative pressure suction, and sucks the impurities away through the suction holes. After the impurities are removed, the grid bar continues to rotate until it leaves the dust scraper, where it is recharged by the internal electric field, restoring the electrostatic adsorption state and entering the next working cycle.

[0015] The circumferential detection element includes a support plate mounted on the inner wall of a light shield. A detection camera is mounted on one side of the support plate, and a bracket is mounted on the other side of the camera. An air jet box is mounted on the bracket, and the air jet box is angled relative to the bracket. An air jet nozzle is installed at the bottom of the air jet box. The detection camera and the air jet box are connected to a control system. The air jet box forms a tangential angle with the syringe. Controlling the air jet box to eject airflow causes the syringe to rotate, simultaneously forming an air film to prevent airborne impurities from re-adhering to the syringe surface. The detection camera is then used to perform visual inspection of the syringe.

[0016] The limiting element includes a second driving component, which is mounted on the transport device. A lead screw is mounted on one side of the second driving component, and the lead screw has two threads with different directions of rotation. Limiting plates are slidably mounted on the lead screw, with the two limiting plates located on different threads. A support cylinder is mounted on the limiting plate, and a support block is rotatably mounted inside the support cylinder. The second driving component is a second motor, which controls the rotation of the lead screw. The lead screw drives the two limiting plates to move towards each other until the support blocks abut against both ends of the syringe, restricting the axial movement of the syringe and preventing airflow from causing axial movement and affecting the accuracy of the detection.

[0017] The transport device includes a base mounted on a workbench. A third drive unit is mounted on the base, and a rotating shaft is rotatably mounted on the base. The third drive unit is mounted on the rotating shaft, and a rotating belt is mounted on the rotating shaft. A V-groove is installed on one side of the rotating belt. The third drive unit is connected to a control system. The third drive unit is a third motor, which drives the rotating shaft to rotate. The rotating shaft drives the rotating belt to rotate, and the rotating belt moves the V-groove, allowing the syringe to be placed into the V-groove for transport.

[0018] The friction block is made of an electropositive material, the friction ring is made of an electronegative material, and the grid is made of a semi-conductive material.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: Before the syringe is inspected, the syringe is pretreated using electrostatic adsorption technology. During the rotation of the wiping roller, static electricity is generated inside it through friction and stored, giving the wiping roller a stable electrostatic adsorption capacity. Through electrostatic induction, the outer layer of the wiping roller becomes statically charged, and the static electricity is used to adsorb small impurities attached to the outer wall of the syringe. At the same time, the adsorbed impurities can be scraped off, realizing automatic cleaning of the wiping roller and maintaining the continuous and effective adsorption capacity of the wiping roller. In addition, during the appearance inspection of the syringe, a stable airflow is generated by the airflow drive structure. While driving the syringe to rotate, an air film is formed around the syringe to prevent the syringe from being contaminated again during the inspection process, thereby improving the accuracy of defect identification and the reliability of appearance inspection. Attached Figure Description

[0020] Figure 1 This is a perspective view of the appearance inspection device of the present invention;

[0021] Figure 2 This is a perspective view of the detection device of the present invention;

[0022] Figure 3 This is a perspective view of the dust removal component and the detection component of the present invention;

[0023] Figure 4 This is an exploded view of the wiping roller and the inner cleaning element of the present invention;

[0024] Figure 5 This is a cross-sectional view of the wiping roller and inner cleaning element of the present invention;

[0025] Figure 6 This is a perspective view of the lifting element and the scraping element of the present invention;

[0026] Figure 7 This is a perspective view of the transport device of the present invention;

[0027] Figure 8 This is a perspective view of the detection component of the present invention.

[0028] In the diagram: 1. Detection device; 11. Dust removal assembly; 111. Wiping roller; 1111. Central shaft; 1112. Friction block; 1113. Metal cavity; 1114. First tip; 1115. Friction ring; 1116. Insulating cylinder; 1117. Grid; 112. Inner cleaning element; 1121. Axial fan blade; 1122. Air outlet; 1123. Flow groove; 1124. Air inlet; 1125. Dust collection box; 113. Lifting element; 1131. Side plate; 1132. Connecting plate; 1133. First driving element; 1134. L-shaped plate; 1135. Sliding groove; 1136. Two tips; 114. Scraping element; 1141. Dust scraper; 1142. Dust collection box; 1143. Grounding brush; 12. Detection assembly; 121. Circumferential detection element; 1211. Support plate; 1212. Detection camera; 1213. Air jet box; 122. Limiting element; 1221. Lead screw; 1222. Limiting plate; 1223. Support cylinder; 1224. Support block; 1225. Second driving component; 13. Air jet assembly; 2. Transport device; 21. Base; 22. Third driving component; 23. Rotating shaft; 24. Rotating belt; 25. V-groove; 3. Unloading conveyor belt; 4. Workbench. Detailed Implementation

[0029] 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.

[0030] like Figures 1-7 The first embodiment of the present invention shown includes a syringe manufacturing appearance inspection device comprising a workbench 4, a transport device 2 mounted on the workbench 4, a feeding conveyor belt 3 mounted on one side of the transport device 2, and an inspection device 1 mounted on the upper part of the transport device 2. The feeding conveyor belt 3 is connected to a control system. During operation, the syringe is transported from the previous process to the transport device 2, and the transport device 2 transports the syringe to the inspection device 1. The inspection device 1 performs visual inspection on the appearance of the syringe to detect whether the syringe has defects. After the outer side is inspected, the syringe is transported from the transport device 2 to the feeding conveyor belt 3.

[0031] The detection device 1 includes a light shield and a dust removal component 11. The light shield is installed on the workbench 4 and is located above the transport device 2. The detection component 12 is installed on the inner wall of the light shield. The transport device 2 is equipped with an air jet component 13, which is connected to the control system. When the transport device 2 transports the syringe to the dust removal component 11, the nozzle of the air jet component 13 forms a tangential angle with the syringe. The air jet component 13 is controlled to spray out a tangential airflow, which drives the syringe to rotate. The dust removal component 11 removes the impurities adhering to the outer circumferential wall of the syringe. The transport device 2 transports the dust-removed syringe to the detection component 12. The detection component 12 performs visual inspection on the syringe. The inspected syringe is then transported to the unloading conveyor belt 3 for the next process.

[0032] The dust removal assembly 11 includes a lifting element 113, which is installed on the inner wall of the light shield. A scraping element 114 is mounted on the lifting element 113, and a wiping roller 111 is rotatably mounted inside the lifting element 113. The wiping roller 111 is located above the transport device 2, and the scraping element 114 abuts against the wiping roller 111. An internal cleaning element 112 is mounted on the wiping roller 111. The lifting element 113 is controlled to move the wiping roller 111 to the syringe. The wiping roller 111 adsorbs impurities adhering to the syringe. When the wiping roller 111 rotates to the scraping element 114, the scraping element 114 scrapes away the impurities adsorbed by the wiping roller 111. The scraped-off impurities are sucked away by the scraping element 114. The internal cleaning element 112 removes the impurities generated inside the wiping roller 111 during long-term rotation, maintaining the stability of internal triboelectricity.

[0033] The wiping roller 111 includes a central shaft 1111, which is mounted on a lifting element 113. A friction block 1112 is mounted on the central shaft 1111. A metal cavity 1113 is rotatably mounted on the outer side of the central shaft 1111. A friction ring 1115 is installed inside the metal cavity 1113 and abuts against the friction block 1112. A first tip 1114 is mounted on the outer side of the metal cavity 1113. An insulating cylinder 1116 is sleeved on the outer side of the insulating cylinder 1113. A grid bar 1117 is mounted on the outer side of the insulating cylinder 1116. The surface of the grid bar 1117 is provided with a spiral groove, which is used to increase the friction between the grid bar and the surface of the syringe. The friction block 1112 is made of an electropositive material, the friction ring 1115 is made of an electronegative material, and the grid bar 1117 is made of a semi-conductive material.

[0034] Before the testing process, the wiping roller 111 is rotated for a period of time to generate sufficient initial charge inside it. While the syringe is rotating, it drives the grid bar 1117 to rotate, which in turn drives the insulating cylinder 1116 to rotate. The insulating cylinder 1116 then drives the metal cavity 1113 to rotate, which in turn drives the friction ring 1115 to rotate. The friction ring 1115 rotates relative to the friction block 1112, generating friction and causing charge transfer at the contact interface. The negatively charged friction ring 1115 transfers its negative charge to the inner surface of the metal cavity 1113. Like charges on the metal cavity 1113 repel each other, and the net charge automatically diffuses towards the outermost surface of the conductor, eventually distributing evenly across the metal cavity 1113. On the outer surface of 13, the insulating cylinder 1116 blocks the conduction current between the metal cavity 1113 and the grid 1117, preventing the charge from flowing directly from the metal cavity 1113 to the grid 1117, thus preventing the rapid loss of charge inside the metal cavity 1113 and allowing the charge to remain on the metal cavity 1113, thereby generating a stable electric field. The grid 1117 is a semi-conductive material, which undergoes electrostatic induction under the electric field of the metal cavity 1113, thereby generating a stable static electricity on the surface of the grid 1117. The static electricity on the surface of the grid 1117 then attracts the fine impurities adhering to the outer wall of the syringe to the grid 1117. When the syringe drives the wiping roller 111 to rotate, it will generate static electricity again, replenishing the charge inside the metal cavity 1113.

[0035] The internal cleaning element 112 includes an axial fan blade 1121, which is mounted on a metal cavity 1113. An air outlet 1122 and an air inlet 1124 are provided on the central shaft 1111. A flow groove 1123 is provided inside the central shaft 1111, which is connected to the air outlet 1122 and the air inlet 1124. The air outlet 1122 is located inside the metal cavity 1113. A vent is provided at one end of the metal cavity 1113. A dust collection box 1125 is installed on one side of the metal cavity 1113. The vent is connected to the dust collection box 1125, and the dust collection box 1125 is connected to the air inlet 1124. A filter plate is installed inside the air inlet 1124.

[0036] When the metal cavity 1113 rotates, it drives the axial fan blade 1121 to rotate. The axial fan blade 1121 generates axial airflow inside the metal cavity 1113, which blows the debris generated by the friction block 1112 and friction ring 1115 through the vent to the dust collection box 1125. The debris is blocked by the filter plate and remains in the dust collection box 1125. The airflow enters the flow groove 1123 from the air inlet 1124, enters the air outlet 1122 from the flow groove 1123, and then flows back into the metal cavity 1113 from the air outlet 1122, forming an internal circulation clean airflow. This prevents external gas from entering the metal cavity 1113 and avoids the debris generated by friction from adhering to the friction surface, thus maintaining a stable output of triboelectric charge.

[0037] The lifting element 113 includes a side plate 1131, which is installed on the inner wall of the light shield. A connecting plate 1132 is installed between the two side plates 1131. A first driving member 1133 is installed on the connecting plate 1132. A sliding groove 1135 is provided on the side plate 1131. An L-shaped plate 1134 is slidably installed in the sliding groove 1135. The L-shaped plate 1134 is installed on the first driving member 1133. A central shaft 1111 rotates on the L-shaped plate 1134. A second tip 1136 is installed on the L-shaped plate 1134. The first tip 1114 and the second tip 1136 are on the same axis. The first driving member 1133 is connected to the control system. The first driving component 1133 is a first cylinder. When the syringe is transported to the area below the wiping roller 111, the cylinder rod of the first cylinder is extended. The first cylinder drives the L-shaped plate 1134 to move away from the connecting plate 1132 in the sliding groove 1135. The L-shaped plate 1134 drives the wiping roller 111 to move away from the connecting plate 1132 until the wiping roller 111 moves to the surface of the syringe. When cleaning is finished, the cylinder rod of the first cylinder is retracted to reset the wiping roller 111.

[0038] The scraping element 114 includes a grounding brush 1143, which is mounted on an L-shaped plate 1134. One end of the grounding brush 1143 abuts against a grid bar 1117. A dust collection box 1142 is mounted on one side of the grounding brush 1143. A dust collection hole is installed at the bottom of the dust collection box 1142. A dust scraper 1141 is mounted on one side of the dust collection box 1142, with one end of the dust scraper 1141 abutting against the grid bar 1117. The dust collection box 1142 and the dust scraper 1141 are mounted on the L-shaped plate 1134. The dust collection box 1142 is connected to the control system. When the grid bar 1117 rotates to the grounding brush 1143, the grid bar 1117 contacts the grounding brush 1143. The induced charge on the surface of the grid bar 1117 is conducted to the ground through the grounding brush 1143, weakening the electrostatic attraction of the grid bar 1117. Since the grid bars on the insulating cylinder 1116 are separate, only the induced charge on the grid bar 1117 that contacts the grounding brush 1143 will be conducted to the ground; the other grid bars 1117 will still carry a charge. Simultaneously, because the grid bar 1117 and the metal cavity 1113 are connected by an insulator... The cylinder 1116 is separated. The grounding brush 1143 only conducts the induced charge on the grid 1117, but does not conduct the charge on the metal cavity 1113. The dust scraper 1141 scrapes the impurities off the surface of the grid 1117. The dust collection box 1142 is controlled to generate negative pressure suction, which sucks away the impurities through the suction hole. After the impurities are removed, the grid 1117 continues to rotate until it leaves the dust scraper 1141. It is then recharged by the internal electric field and returns to the electrostatic adsorption state, entering the next working cycle.

[0039] The transport device 2 includes a base 21, which is mounted on a workbench 4. A third drive component 22 is mounted on the base 21, and a rotating shaft 23 is rotatably mounted on the base 21. The third drive component 22 is mounted on the rotating shaft 23, and a rotating belt 24 is mounted on the rotating shaft 23. A V-groove 25 is installed on one side of the rotating belt 24. The third drive component 22 is connected to a control system. The third drive component 22 is a third motor, which drives the rotating shaft 23 to rotate. The rotating shaft 23 drives the rotating belt 24 to rotate, and the rotating belt 24 moves the V-groove 25, allowing the syringe to be placed into the V-groove 25 for transport.

[0040] like Figure 8 The second embodiment of the present invention shown provides a detection component 12 that is different from that in the first embodiment. The difference is that the detection method of the detection component 12 is changed in this embodiment. A tangential airflow is used to drive the syringe to rotate, so that the detection camera 1212 can detect the circumferential area of ​​the syringe. The tangential airflow does not pass through the field of view of the detection camera 1212, so as to prevent the airflow from interfering with the detection camera 1212. At the same time, the tangential airflow will form a continuous adhering air film on the surface of the syringe. When suspended dust, fibers and other impurities in the external environment approach the syringe, they will be blown away or deflected by the air film and cannot adhere to the surface of the syringe that has just been cleaned, thus preventing secondary contamination of the surface of the syringe.

[0041] Specifically, the detection assembly 12 includes a circumferential detection element 121, which is installed on the inner wall of the light shield. A limiting element 122 is installed on the transport device 2. When the syringe is transported to the circumferential detection element 121, the limiting element 122 axially limits the syringe to prevent axial movement of the syringe during detection from affecting the accuracy of the detection. The circumferential detection element 121 blows the syringe to rotate circumferentially and performs the detection.

[0042] The circumferential detection element 121 includes a support plate 1211, which is installed on the inner wall of a light shield. A detection camera 1212 is mounted on one side of the support plate 1211, and a bracket is mounted on one side of the detection camera 1212. An air jet box 1213 is mounted on the bracket and is inclined relative to the bracket. An air jet hole is installed at the bottom of the air jet box 1213. The detection camera 1212 and the air jet box 1213 are connected to a control system. The air jet box 1213 forms a tangential angle with the syringe. The air jet box 1213 is controlled to eject airflow, which drives the syringe to rotate and simultaneously forms an air film to prevent impurities in the air from re-adhering to the surface of the syringe. The detection camera 1212 is controlled to perform visual inspection of the syringe.

[0043] The limiting element 122 includes a second driving member 1225, which is mounted on the transport device 2. A lead screw 1221 is mounted on one side of the second driving member 1225. The lead screw 1221 has two threads with different directions of rotation. Limiting plates 1222 are slidably mounted on the lead screw 1221, with the two limiting plates 1222 located on different threads. A support cylinder 1223 is mounted on the limiting plate 1222, and a support block 1224 is rotatably mounted inside the support cylinder 1223. The second driving member 1225 is a second motor, which controls the second motor to drive the lead screw 1221 to rotate. The lead screw 1221 drives the two limiting plates 1222 to move towards each other until the support blocks 1224 abut against both ends of the syringe, limiting the axial movement of the syringe and preventing airflow from blowing the syringe and causing axial movement, thus avoiding affecting the accuracy of the detection.

[0044] Working principle of the invention:

[0045] During operation, the syringe is transported from the previous process to the V-groove 25. The third motor is controlled to drive the rotating shaft 23 to rotate, which in turn drives the rotating belt 24 to rotate. The rotating belt 24 moves the V-groove 25, transporting the syringe to below the wiping roller 111. The third motor is then stopped, and the jet assembly 13 is controlled to spray tangential airflow. The tangential airflow drives the syringe to rotate. When the syringe is transported to below the wiping roller 111, the cylinder rod of the first cylinder is extended. The first cylinder drives the L-shaped plate 1134 to move away from the connecting plate 1132 in the sliding groove 1135. The L-shaped plate 1134 drives the wiping roller 111 to move away from the connecting plate 1132 until the wiping roller 111 moves to the surface of the syringe.

[0046] Before the testing process, the wiping roller 111 is rotated for a period of time to generate an initial charge inside it. While the syringe is rotating, it drives the grid bar 1117 to rotate, which in turn drives the insulating cylinder 1116 to rotate. The insulating cylinder 1116 then drives the metal cavity 1113 to rotate, which in turn drives the friction ring 1115 to rotate. The friction ring 1115 and the friction block 1112 rotate relative to each other, generating friction and causing charge transfer at the contact interface. The negatively charged friction ring 1115 transfers its negative charge to the inner surface of the metal cavity 1113. Like charges on the metal cavity 1113 then interact... Due to repulsion, the net charge automatically diffuses to the outermost surface of the conductor, eventually distributing evenly on the outer surface of the metal cavity 1113. The insulating cylinder 1116 blocks the conduction current between the metal cavity 1113 and the grid 1117, preventing the charge from flowing directly from the metal cavity 1113 to the grid 1117. The grid 1117 is a semi-conductive material that generates charge under the electrostatic induction of the metal cavity 1113, producing stable static electricity. This attracts fine impurities adhering to the outer wall of the syringe to the grid 1117. Subsequently, when the syringe drives the wiping roller 111 to rotate, it will generate static electricity again, replenishing the charge inside the metal cavity 1113.

[0047] When the grid bar 1117 rotates to the grounding brush 1143, the grid bar 1117 contacts the grounding brush 1143. The induced charge on the surface of the grid bar 1117 is conducted to the ground through the grounding brush 1143, weakening the electrostatic adsorption force of the grid bar 1117. The dust scraper 1141 scrapes the impurities off the surface of the grid bar 1117, controls the dust collection box 1142 to generate negative pressure suction, and sucks away the impurities through the dust collection hole. After the impurities are removed, the grid bar 1117 continues to rotate until it leaves the dust scraper 1141, and is recharged by the internal electric field, restoring the electrostatic adsorption state and entering the next working cycle.

[0048] When the metal cavity 1113 rotates, it drives the axial fan blade 1121 to rotate. The axial fan blade 1121 generates axial airflow inside the metal cavity 1113, which blows the debris generated by the friction block 1112 and friction ring 1115 through the vent to the dust collection box 1125. The debris is blocked by the filter plate and remains in the dust collection box 1125. The airflow enters the flow groove 1123 from the air inlet 1124, enters the air outlet 1122 from the flow groove 1123, and then flows back into the metal cavity 1113 from the air outlet 1122, forming an internal circulation clean airflow. This prevents external gas from entering the metal cavity 1113 and avoids the debris generated by friction from adhering to the friction surface, thus maintaining a stable output of triboelectric charge.

[0049] After cleaning is completed, the third motor is started again, causing the V-groove 25 to move the syringe to the bottom of the detection camera 1212. The second motor is then started to rotate the lead screw 1221, which in turn moves the two limiting plates 1222 towards each other until the support block 1224 abuts against both ends of the syringe, restricting the axial movement of the syringe and preventing the airflow from causing axial movement and affecting the accuracy of the detection. The jet box 1213 is then started to spray out tangential airflow, which drives the syringe to rotate, allowing the detection camera 1212 to detect the circumferential area of ​​the syringe. This tangential airflow does not pass through the field of view of the detection camera 1212, preventing the airflow from interfering with the detection camera 1212. At the same time, the tangential airflow forms a continuous adhering air film on the surface of the syringe. When suspended dust, fibers and other impurities in the external environment approach the syringe, they are blown away or deflected by the air film and cannot adhere to the cleaned surface of the syringe, preventing secondary contamination of the syringe surface. The syringe after detection is then transported to the unloading conveyor belt 3 for the next process.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A visual inspection device for syringe manufacturing, characterized in that: Includes a workbench (4), on which a transport device (2) is installed, a feeding conveyor belt (3) is installed on one side of the transport device (2), a detection device (1) is installed on the upper part of the transport device (2), and the feeding conveyor belt (3) is connected to the control system. The detection device (1) includes a light shield and a dust removal component (11). The light shield is installed on the workbench (4) and is located on the upper part of the transport device (2). The inner wall of the light shield is equipped with a detection component (12). The transport device (2) is equipped with a jet assembly (13) and the jet assembly (13) is connected to the control system. The dust removal assembly (11) includes a lifting element (113), which is installed on the inner wall of the light shield. A scraping element (114) is installed on the lifting element (113). A wiping roller (111) is rotatably installed inside the lifting element (113). The wiping roller (111) is located above the transport device (2). The scraping element (114) abuts against the wiping roller (111). An inner cleaning element (112) is installed on the wiping roller (111).

2. The appearance inspection equipment for syringe production according to claim 1, characterized in that: The detection assembly (12) includes a circumferential detection element (121), which is installed on the inner wall of the light shield, and a limit element (122) is installed on the transport device (2).

3. The appearance inspection equipment for syringe production according to claim 2, characterized in that: The wiping roller (111) includes a central shaft (1111), which is mounted on a lifting element (113). A friction block (1112) is mounted on the central shaft (1111). A metal cavity (1113) is rotatably mounted on the outer side of the central shaft (1111). A friction ring (1115) is installed inside the metal cavity (1113). The friction ring (1115) abuts against the friction block (1112). A first tip (1114) is mounted on the outer side of the metal cavity (1113). An insulating cylinder (1116) is sleeved on the outer side of the metal cavity (1113). A grid bar (1117) is mounted on the outer side of the insulating cylinder (1116). The surface of the grid bar (1117) is provided with a spiral groove.

4. The appearance inspection equipment for syringe production according to claim 3, characterized in that: The internal cleaning element (112) includes an axial fan blade (1121) mounted on a metal cavity (1113). An air outlet (1122) and an air inlet (1124) are provided on the central shaft (1111). A flow groove (1123) is provided inside the central shaft (1111), and the flow groove (1123) communicates with the air outlet (1122). The air inlet (1124) is connected to the air outlet (1122), which is located inside the metal cavity (1113). One end of the metal cavity (1113) is provided with a vent hole, and a dust collection box (1125) is installed on one side of the metal cavity (1113). The vent hole is connected to the dust collection box (1125), and the dust collection box (1125) is connected to the air inlet (1124). A filter plate is installed inside the air inlet (1124).

5. The appearance inspection equipment for syringe production according to claim 4, characterized in that: The lifting element (113) includes a side plate (1131), which is installed on the inner wall of the light shield. A connecting plate (1132) is installed between the two side plates (1131). A first driving member (1133) is installed on the connecting plate (1132). A sliding groove (1135) is provided on the side plate (1131). An L-shaped plate (1134) is slidably installed in the sliding groove (1135). The L-shaped plate (1134) is installed on the first driving member (1133). The central shaft (1111) rotates on the L-shaped plate (1134). A second tip (1136) is installed on the L-shaped plate (1134). The first tip (1114) and the second tip (1136) are on the same axis. The first driving member (1133) is connected to the control system.

6. The appearance inspection equipment for syringe production according to claim 5, characterized in that: The scraping element (114) includes a grounding brush (1143), which is mounted on an L-shaped plate (1134). One end of the grounding brush (1143) abuts against a grid bar (1117). A dust collection box (1142) is mounted on one side of the grounding brush (1143). A dust collection hole is installed at the bottom of the dust collection box (1142). A dust scraper (1141) is mounted on one side of the dust collection box (1142). One end of the dust scraper (1141) abuts against a grid bar (1117). The dust collection box (1142) and the dust scraper (1141) are mounted on the L-shaped plate (1134). The dust collection box (1142) is connected to the control system.

7. A visual inspection device for syringe production according to any one of claims 2-6, characterized in that: The circumferential detection element (121) includes a support plate (1211), which is installed on the inner wall of the light shield. A detection camera (1212) is installed on one side of the support plate (1211), and a bracket is installed on one side of the detection camera (1212). An air jet box (1213) is installed on the bracket. The air jet box (1213) is inclined relative to the bracket. An air jet hole is installed at the bottom of the air jet box (1213). The detection camera (1212) and the air jet box (1213) are connected to the control system.

8. The appearance inspection equipment for syringe production according to claim 7, characterized in that: The limiting element (122) includes a second driving member (1225), which is mounted on the transport device (2). A lead screw (1221) is mounted on one side of the second driving member (1225). The lead screw (1221) has two threads with different directions of rotation. A limiting plate (1222) is slidably mounted on the lead screw (1221). The two limiting plates (1222) are located on different threads. A support cylinder (1223) is mounted on the limiting plate (1222). A support block (1224) is rotatably mounted inside the support cylinder (1223).

9. The appearance inspection equipment for syringe production according to claim 1, characterized in that: The transport device (2) includes a base (21), which is mounted on a workbench (4). A third drive component (22) is mounted on the base (21). A rotating shaft (23) is rotatably mounted on the base (21). The third drive component (22) is mounted on the rotating shaft (23). A rotating belt (24) is mounted on the rotating shaft (23). A V-groove (25) is mounted on one side of the rotating belt (24). The third drive component (22) is connected to the control system.

10. The appearance inspection equipment for syringe production according to claim 3, characterized in that: The friction block (1112) is an electropositive material, the friction ring (1115) is an electronegative material, and the grid strip (1117) is a semiconductive material.

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