Defect detection apparatus for a protective film

Abstract

The present application relates to the technical field of protective film detection, and discloses a kind of defect detection equipment of protective film, including detection seat, industrial detection camera, cylinder, feeding assembly, winding assembly, rod type elastic component, piston type roller assembly and push-pull gas guide assembly;Through first slide way is opened in detection seat, feeding assembly, winding assembly are all in the sliding of first slide way, protective film is connected between feeding assembly and winding assembly, industrial detection camera and piston type roller assembly are installed side by side on detection seat and located above protective film.This application cylinder drives winding assembly to realize the tightening and winding of protective film, combined with the pressure applied by piston type roller assembly and the static electricity and dust removal function of ion fan assembly, the effective detection of small scratches on the surface of protective film is realized.This integrated detection mechanism not only significantly improves the detection accuracy, makes the originally difficult to identify small scratch features more obvious, optimizes the detection efficiency and shortens the detection time.

Description

A defect detection device for protective films Technical Field

[0001] This invention relates to the field of protective film testing technology, and more particularly to a defect detection device for protective films. Background Technology

[0002] Automotive protective film is an important product used to protect the surface of a car body, improve the appearance quality and lifespan of the vehicle. Its main functions include preventing scratches, resisting ultraviolet rays, heat insulation, and enhancing the gloss of the paint. In the production process of automotive protective film, in order to ensure product quality, it is necessary to detect its surface defects. An automated inspection method based on industrial cameras and image processing technology has been introduced. During inspection, the automotive protective film is wound onto the feeding roller, and one end of the protective film is fixed to the surface of the take-up roller. Then, the take-up roller is rotated to wind up the protective film. During the winding process, the surface of the protective film is scanned by an industrial camera to detect surface defects.

[0003] During the inspection of automotive protective films, due to their unique optical properties, tiny scratches and defects on the surface of the protective film may be difficult to identify effectively during image acquisition and analysis, resulting in unclear defect features and seriously affecting the accuracy and reliability of the inspection.

[0004] To address the aforementioned issues, this application proposes a defect detection device for protective films. Summary of the Invention

[0005] This invention proposes a defect detection device for protective films, which solves the problem in related technologies that, due to the unique optical properties of protective films, small scratches on the surface of the protective film may be difficult to effectively identify during image acquisition and analysis, resulting in unclear defect features and thus affecting the accuracy and reliability of detection.

[0006] The present invention proposes a defect detection device for a protective film, comprising a detection seat, an industrial inspection camera, a cylinder, a feeding assembly, a winding assembly, a rod-type elastic assembly, a piston-type roller pressing assembly, and a push-pull air guiding assembly;

[0007] The detection seat has a through first slide rail. The feeding assembly and the winding assembly both slide within the first slide rail. A protective film connects the feeding assembly and the winding assembly. The industrial inspection camera and the piston-type roller pressing assembly are mounted side by side on the detection seat and located above the protective film. The rod-type elastic assembly connects the feeding assembly and one side of the detection seat. The cylinder is used to drive the winding assembly to move within the first slide rail.

[0008] The push-pull air guide assembly is installed on the other side of the detection seat and connected to the winding assembly. The push-pull air guide assembly is used to guide gas into the piston roller pressing assembly when the cylinder drives the winding assembly away from the feeding assembly, so that the piston roller pressing assembly moves down under the action of air pressure to apply downward pressure to the protective film.

[0009] As a further optimization of the present invention, the rod-type elastic component includes a connecting rod and a first tension spring. The connecting rod is installed on the side of the feeding component, and one end of the connecting rod slides through one side of the detection seat. The first tension spring is sleeved on the connecting rod, and both ends of the first tension spring are respectively connected to the inner wall of one side of the detection seat and the side of the feeding component.

[0010] As a further optimization of the present invention, the piston-type roller pressing assembly includes a first air cylinder, and a mounting block located above the protective film is installed on the detection seat. A through mounting hole is opened in the mounting block. The first air cylinder is vertically installed in the mounting hole. An elastic piston is installed in the first air cylinder. The bottom end of the elastic piston slides through the bottom end of the first air cylinder and is fitted with a roller pressing component, which is located above the protective film. A first air hole is opened at the bottom end of the first air cylinder, and the top end of the first air cylinder is connected to the push-pull air guiding assembly.

[0011] As a further optimization of the present invention, the elastic piston component includes a first piston, a first shaft, and a second spring. The first piston is slidably disposed inside a first air cylinder. The first shaft is installed at the bottom of the first piston, and the bottom end of the first shaft slides through the bottom end of the first air cylinder. The roller is installed at the bottom end of the first shaft. The second spring is sleeved on the first shaft, and both ends of the second spring are respectively connected to the inner wall of the bottom end of the first air cylinder and the first piston.

[0012] As a further optimization of the present invention, the roller pressing component includes a U-shaped frame and a pressure roller. The U-shaped frame is installed at the bottom end of the first shaft, and the pressure roller is rotatably disposed in the middle of the U-shaped frame, with the pressure roller located above the protective film.

[0013] As a further optimization of the present invention, the push-pull air guide assembly includes a second air cylinder, the second air cylinder is installed on the other side of the detection seat, a piston-type push-pull member is slidably arranged inside the second air cylinder, and one end of the piston-type push-pull member is connected to the winding assembly. A second air hole is opened at one end of the second air cylinder, and an air guide pipe is connected to the other end. The end of the air guide pipe away from the second air cylinder is connected to the top of the first air cylinder.

[0014] The piston-type push-pull component includes a second piston, which is slidably disposed inside a second air cylinder. A second shaft is mounted on the side of the second piston, and one end of the second shaft slides through one end of the second air cylinder and is connected to the winding assembly.

[0015] As a further optimization of the present invention, a tubular dust blowing component is installed inside the U-shaped frame, located above the pressure roller and facing the protective film, and the tubular dust blowing component is connected to the ion fan assembly.

[0016] As a further optimization of the present invention, the tubular dust blowing component includes a dust blowing pipe, which is horizontally installed in the U-shaped frame and located above the pressure roller. Several dust blowing nozzles are connected to the dust blowing pipe at intervals and facing the protective film. One end of the dust blowing pipe is connected to an ion fan assembly.

[0017] The ion fan assembly includes an ion fan body and an air supply hose, with both ends of the air supply hose connected to one end of a dust blowing pipe and the air outlet of the ion fan body, respectively.

[0018] As a further optimization of the present invention, the feeding assembly includes a first assembly block, the first assembly block is slidably disposed in a first slide rail, a first motor is mounted on the back of the first assembly block, the output end of the first motor is connected to a first expansion shaft located on the front of the first assembly block, a feeding roller is fitted on the first expansion shaft, the protective film is wrapped around the feeding roller, and the other end of the connecting rod and one end of the first tension spring are both connected to the side of the first assembly block.

[0019] As a further optimization of the present invention, the winding assembly includes a second assembly block, which is slidably disposed within a first slide rail. The cylinder is installed on the other side of the detection seat, and the driving end of the cylinder is connected to the second assembly block. The second assembly block is driven by the cylinder to move closer to and further away from the first assembly block. A second motor is installed on the back of the second assembly block, and the output end of the second motor is connected to a second expansion shaft located on the front of the second assembly block. A winding roller is fitted on the second expansion shaft. One end of the protective film is connected to the winding roller. A second slide rail is provided in the detection seat, which passes through and is located above the first slide rail. A sliding opening communicating with the first slide rail is provided at the bottom of the second slide rail. A slider located within the second slide rail and slidingly engaging with the sliding opening is installed on the second assembly block. One end of the second shaft extends into the second slide rail and is connected to the slider.

[0020] The above-described technical solution of the present invention has the following beneficial technical effects:

[0021] 1. When performing defect detection on the protective film, the present invention can drive the winding assembly to slide along the first slide and move away from the feeding assembly by a cylinder. Since the feeding assembly and the winding assembly are connected by a protective film, the feeding assembly can also move along the first slide under the traction of the protective film. The rod-type elastic component connected to the feeding assembly is then stretched, and the protective film between the feeding assembly and the winding assembly is in a taut state. Then, the winding assembly can be used to wind up the taut protective film. Then, the industrial inspection camera scans the protective film during the winding process. When the protective film is taut, the fine scratches on its surface are magnified, and the scratch features that were originally difficult to identify become more obvious, so that the industrial inspection camera can scan these defects more clearly, thereby reducing the missed detection rate, ensuring the accuracy of the detection results, and providing a more reliable basis for subsequent quality control.

[0022] 2. When the cylinder drives the winding assembly away from the feeding assembly, the winding assembly immediately pushes the push-pull air guide assembly to move, guiding the gas in the push-pull air guide assembly to the piston-type roller pressing assembly. After the gas enters the piston-type roller pressing assembly, it moves downward under pressure, applying downward pressure to the protective film. This allows the protective film to withstand tension while also being subjected to downward pressure, making fine scratches on the surface of the protective film more prominent. This facilitates quick and accurate identification by industrial inspection cameras, helps shorten inspection time, improves inspection efficiency, and better ensures inspection quality, ensuring that fine scratches can be detected in a timely manner.

[0023] 3. During the protective film winding process, the ion fan assembly generates a large number of positive and negative ions by ionizing the air, and blows the airflow onto the surface of the protective film through a tubular dust blower. This removes fine dust particles from the protective film surface and neutralizes the static electricity on the protective film surface, preventing dust particles from re-adhering to the protective film surface. By integrating the static electricity removal and dust removal of the protective film, the images captured by the industrial inspection camera are ensured to be clear and accurate, unaffected by external factors, thereby improving the stability and reliability of the inspection system and providing a strong guarantee for high-quality inspection.

[0024] 4. This invention uses a cylinder-driven winding assembly to tighten and wind up the protective film. Combined with the pressure applied by a piston-type roller pressing assembly and the static electricity removal and dust removal functions of the ion fan assembly, it achieves effective detection of fine scratches on the surface of the protective film. This integrated detection mechanism not only significantly improves detection accuracy, making previously difficult-to-identify fine scratch features more obvious, but also optimizes detection efficiency and shortens detection time. At the same time, by removing dust and static electricity, it ensures the stability and reliability of image acquisition, enhances the overall stability of the detection system, and provides a strong guarantee for the high-quality production of automotive protective films. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the overall structure of a defect detection device for a protective film proposed in this invention.

[0026] Figure 2 is a front view of a defect detection device for a protective film proposed in this invention.

[0027] Figure 3 is a schematic diagram of the back structure of a defect detection device for a protective film proposed in this invention.

[0028] Figure 4 is a schematic diagram of the rod-type elastic component structure of the present invention.

[0029] Figure 5 is a schematic diagram of the feeding assembly and winding assembly of the present invention.

[0030] Figure 6 is a schematic diagram of the piston-type roller pressing assembly of the present invention.

[0031] Figure 7 is an internal cross-sectional view of the first air cylinder of the present invention.

[0032] Figure 8 is a schematic diagram of the structure of the tubular dust blowing component of the present invention.

[0033] Figure 9 is a schematic diagram of the push-pull air guide assembly of the present invention.

[0034] Figure 10 is an internal cross-sectional view of the second air cylinder of the present invention.

[0035] Figure 11 is an enlarged view of A in Figure 10 of this invention.

[0036] Reference numerals: 1. Detection seat; 101. Industrial inspection camera; 102. First slide rail; 103. Cylinder; 104. Second slide rail; 105. Mounting block; 2. Feeding assembly; 21. First assembly block; 22. First motor; 23. First expansion shaft; 24. Feeding roller; 3. Rewinding assembly; 31. Second assembly block; 32. Second motor; 33. Second expansion shaft; 34. Rewinding roller; 35. Slider; 4. Rod-type elastic assembly; 41. Connecting rod; 42. First tension spring; 5. Piston-type roller pressing assembly; 51. 511 First air cylinder; 52 Elastic piston component; 521 First piston; 522 First shaft; 523 Second spring; 53 Roller component; 531 U-shaped frame; 532 Pressure roller; 6 Push-pull air guide assembly; 61 Second air cylinder; 611 Second air hole; 62 Piston-type push-pull component; 621 Second piston; 622 Second shaft; 63 Air guide pipe; 7 Tubular dust blowing component; 71 Dust blowing pipe; 72 Dust blowing nozzle; 8 Ion fan assembly; 81 Ion fan body; 82 Air supply hose. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0038] As shown in Figures 1-11, the present invention proposes a defect detection device for a protective film, which includes a detection seat 1, an industrial inspection camera 101, a cylinder 103, a feeding assembly 2, a winding assembly 3, a rod-type elastic assembly 4, a piston-type roller pressing assembly 5, and a push-pull air guiding assembly 6.

[0039] The detection seat 1 has a through first slide rail 102. The feeding component 2 and the winding component 3 slide within the first slide rail 102. A protective film connects the feeding component 2 and the winding component 3. The industrial inspection camera 101 and the piston-type roller pressing component 5 are mounted side by side on the detection seat 1 and located above the protective film. The rod-type elastic component 4 connects the feeding component 2 and one side of the detection seat 1. The cylinder 103 is used to drive the winding component 3 to move within the first slide rail 102.

[0040] The push-pull air guide assembly 6 is installed on the other side of the detection seat 1 and connected to the winding assembly 3. The push-pull air guide assembly 6 is used to guide gas into the piston roller pressing assembly 5 when the cylinder 103 drives the winding assembly 3 away from the feeding assembly 2, so that the piston roller pressing assembly 5 moves down under the action of air pressure to apply downward pressure to the protective film.

[0041] During the inspection of the protective film, the cylinder 103 drives the winding assembly 3 to slide away from the feeding assembly 2 along the first slide rail 102. Since the feeding assembly 2 and the winding assembly 3 are connected by the protective film, the feeding assembly 2 will also move along the first slide rail 102 under the traction of the protective film. At this time, the rod-type elastic component 4 connected to the feeding assembly 2 is stretched, so that the protective film between the feeding assembly 2 and the winding assembly 3 is in a taut state. The winding assembly 3 winds up the taut protective film. The industrial inspection camera 101 scans the protective film during the winding process. At the same time, the winding assembly 3 pushes the push-pull air guide component 6, which guides the gas to the piston-type roller pressing component 5. The piston-type roller pressing component 5 moves down under the action of air pressure and applies downward pressure to the protective film. In this way, the fine scratches on the surface of the protective film are more obvious under the taut and pressure state, which makes it easier for the industrial inspection camera 101 to identify them, improves the accuracy of the inspection, and reduces the missed detection rate.

[0042] As shown in Figures 1, 2, and 4, in this embodiment, the rod-type elastic component 4 includes a connecting rod 41 and a first tension spring 42. The connecting rod 41 is installed on the side of the feeding component 2, and one end of the connecting rod 41 slides through one side of the detection seat 1. The first tension spring 42 is sleeved on the connecting rod 41, and both ends of the first tension spring 42 are respectively connected to the inner wall of one side of the detection seat 1 and the side of the feeding component 2. It should be noted that the two ends of the first tension spring 42 are connected to the inner wall of one side of the detection seat 1 and the side of the feeding component 2 by welding. Of course, the first tension spring 42 can also be a spring with hook structures at both ends. The first tension spring 42 is hooked to the inner wall of one side of the detection seat 1 and the side of the feeding assembly 2 by a hook. This embodiment is also within the protection scope of this application. When the winding assembly 3 moves away from the feeding assembly 2 under the action of the cylinder 103, the feeding assembly 2 is pulled by the protective film and moves. The connecting rod 41 moves with the feeding assembly 2 and slides on the detection seat 1. During this process, the first tension spring 42 is stretched and generates elastic tension, so that the protective film is always kept taut. This ensures that the small scratches on the surface of the protective film can be magnified during the winding process, which is beneficial for the industrial inspection camera 101 to scan clearly and improve the detection accuracy.

[0043] As shown in Figures 1 and 6, in this embodiment, the piston-type roller pressing assembly 5 includes a first air cylinder 51. A mounting block 105 is installed on the detection seat 1, positioned above the protective film. A through mounting hole is formed in the mounting block 105. The first air cylinder 51 is vertically installed within the mounting hole. An elastic piston 52 is installed inside the first air cylinder 51. The bottom end of the elastic piston 52 slides through the bottom end of the first air cylinder 51 and is fitted with a roller pressing component 53, which is positioned above the protective film. A first air hole 511 is formed at the bottom end of the first air cylinder 51. The top end of the first air cylinder 51 is connected to the push-pull mechanism. The air guiding component 6 is connected; the winding component 3 pushes and pulls the air guiding component 6, and the gas enters the top of the first air cylinder 51 through the air guiding pipe 63. The elastic piston 52 inside the first air cylinder 51 moves downward under the action of air pressure, which drives the roller pressing component 53 to move downward to apply pressure to the protective film. The first air hole 511 at the bottom of the first air cylinder 51 is used to balance the air pressure and prevent the pressure from being too high or too low, which would affect the roller pressing effect. This structure allows the protective film to be subjected to downward pressure on the basis of being taut, further highlighting the fine scratches, which are easy for the industrial inspection camera 101 to identify, and improving the inspection efficiency and quality.

[0044] As shown in Figures 6 and 7, in this embodiment, the elastic piston 52 includes a first piston 521, a first shaft 522, and a second spring 523. The first piston 521 is slidably disposed inside the first air cylinder 51. The first shaft 522 is installed at the bottom of the first piston 521, and the bottom end of the first shaft 522 slides through the bottom end of the first air cylinder 51. The roller pressing component 53 is installed at the bottom end of the first shaft 522. The second spring 523 is sleeved on the first shaft 522, and both ends of the second spring 523 are respectively connected to the inner wall of the bottom end of the first air cylinder 51 and the first piston 521. After the gas enters the first air cylinder 51, it pushes the first piston 521 to move downward. The first piston 521 drives the first shaft 522 to slide downward, and the roller pressing component 53 installed at the bottom end of the first shaft 522 moves downward accordingly. During the downward movement and reset of the elastic piston 52, it plays a role in buffering and assisting in reset. This design can ensure that the roller pressing component 53 stably applies pressure to the protective film, ensuring that small scratches on the surface of the protective film are more easily detected during testing.

[0045] As shown in Figures 7 and 8, in this embodiment, the roller pressing component 53 includes a U-shaped frame 531 and a pressure roller 532. The U-shaped frame 531 is installed at the bottom end of the first shaft 522, and the pressure roller 532 is rotatably disposed in the middle of the U-shaped frame 531. The pressure roller 532 is located above the protective film, and the surface of the pressure roller 532 can abut against the protective film. The first shaft 522 drives the U-shaped frame 531 to move downward, and the pressure roller 532 in the middle of the U-shaped frame 531 contacts the protective film and applies pressure. The two ends of the pressure roller 532 are rotatably connected to the inner walls on both sides of the U-shaped frame 531, so that the pressure roller 532 can roll when applying pressure to the protective film, reducing damage to the protective film, while ensuring uniform pressure distribution, making the fine scratches on the surface of the protective film more prominent under uniform pressure, which is convenient for the industrial inspection camera 101 to accurately identify.

[0046] As shown in Figures 1, 2, 9, 10, and 11, in this embodiment, the push-pull air guide assembly 6 includes a second air cylinder 61, which is installed on the other side of the detection seat 1. A piston-type push-pull member 62 is slidably disposed inside the second air cylinder 61, and one end of the piston-type push-pull member 62 is connected to the winding assembly 3. A second air hole 611 is opened at one end of the second air cylinder 61, and the other end is connected to an air guide pipe 63. The end of the air guide pipe 63 away from the second air cylinder 61 is connected to the top end of the first air cylinder 51. The piston-type push-pull member 62 includes a second piston 621, which is slidably disposed inside the second air cylinder 61. A second shaft 622 is installed on the side of the second piston 621, and one end of the second shaft 622 slides through one end of the second air cylinder 61 and is connected to the winding assembly 3.

[0047] When the winding assembly 3 moves, it drives the second shaft 622 connected to it to move. The second shaft 622 is connected to the second piston 621. The second piston 621 slides inside the second air cylinder 61. The second air hole 611 at one end of the second air cylinder 61 is used for air intake and exhaust. When the second piston 621 slides, the gas in the second air cylinder 61 is forced into the first air cylinder 51 through the air guide pipe 63, so as to supply air to the piston-type roller pressing assembly 5, so that it applies pressure to the protective film and enhances the detection effect.

[0048] As shown in Figures 3, 7, and 8, in this embodiment, a tubular dust blower 7 is installed inside the U-shaped frame 531, positioned above the pressure roller 532 and facing the protective film. The tubular dust blower 7 is connected to the ion fan assembly 8. The tubular dust blower 7 includes a dust blower pipe 71, which is horizontally installed inside the U-shaped frame 531 and positioned above the pressure roller 532. Several dust blower nozzles 72 are connected to the dust blower pipe 71 at intervals and facing the protective film. One end of the dust blower pipe 71 is connected to the ion fan assembly 8. The ion fan assembly 8 includes an ion fan body 81 and an air supply hose 82. The two ends of the air supply hose 82 are respectively connected to one end of the dust blower pipe 71 and the air outlet end of the ion fan body 81.

[0049] The ionizer 81 generates ionized air, which is delivered to the dust blowing pipe 71 through the air supply hose 82. The dust blowing nozzles 72 arranged at intervals on the dust blowing pipe 71 blow the airflow toward the surface of the protective film. This structural design enables the ionized air to act evenly on the surface of the protective film, effectively removing dust and neutralizing the static electricity on the surface of the protective film, ensuring that the industrial inspection camera 101 can collect images without interference and improving the accuracy of the inspection results.

[0050] As shown in Figures 1 and 5, in this embodiment, the feeding component 2 includes a first assembly block 21, which is slidably disposed in the first slide rail 102. A first motor 22 is mounted on the back of the first assembly block 21. The output end of the first motor 22 is connected to a first expansion shaft 23 located on the front of the first assembly block 21. A feeding roller 24 is fitted on the first expansion shaft 23. A protective film is wrapped around the feeding roller 24. The other end of the connecting rod 41 and one end of the first tension spring 42 are both connected to the side of the first assembly block 21.

[0051] The first motor 22 is started, which drives the first expansion shaft 23 to rotate. The feeding roller 24 mounted on the first expansion shaft 23 rotates accordingly, releasing the protective film. When the winding assembly 3 moves away from the feeding assembly 2 under the action of the cylinder 103, the feeding roller 24 moves with the feeding assembly 2, ensuring a continuous and stable supply of protective film, which provides a guarantee for subsequent tensioning, winding and testing. The first expansion shaft 23 mainly plays a role in fixing the feeding roller 24, which facilitates the disassembly and assembly of the feeding roller 24.

[0052] As shown in Figures 1, 2, and 5, in this embodiment, the winding assembly 3 includes a second assembly block 31, which is slidably disposed within the first slide rail 102. A cylinder 103 is installed on the other side of the detection seat 1, and the driving end of the cylinder 103 is connected to the second assembly block 31. The second assembly block 31 is driven by the cylinder 103 to move closer to and further away from the first assembly block 21. A second motor 32 is installed on the back of the second assembly block 31, and the output end of the second motor 32 is connected to a second expansion shaft 33 located on the front of the second assembly block 31. A winding roller 34 is fitted on the second expansion shaft 33, and one end of the protective film is connected to the winding roller 34. A second slide rail 104 is provided in the detection seat 1, which passes through and is located above the first slide rail 102. A sliding opening is provided at the bottom of the second slide rail 104, which communicates with the first slide rail 102. A slider 35 is installed on the second assembly block 31, which is located within the second slide rail 104 and slides with the sliding opening. One end of the second shaft 622 extends into the second slide rail 104 and is connected to the slider 35.

[0053] The cylinder 103 drives the second assembly block 31 to move within the first slide rail 102, moving closer to or away from the first assembly block 21. The second motor 32 on the second assembly block 31 drives the second expansion shaft 33 to rotate, and the winding roller 34 on the second expansion shaft 33 rotates accordingly to wind up the protective film. The slider 35 on the second assembly block 31 slides within the second slide rail 104, and the second shaft 622 is connected to the slider 35, so that when the winding assembly 3 moves, it drives the push-pull air guide assembly 6 to work. In this way, the winding assembly 3 realizes the winding of the protective film and the driving of the push-pull air guide assembly 6, ensuring that the entire testing process proceeds smoothly.

[0054] The specific working principle of this invention is as follows:

[0055] First, the protective film is wrapped around the feeding roller 24 and one end is fixed to the take-up roller 34. The first motor 22 is started, the feeding roller 24 rotates to release the protective film, and the cylinder 103 is started at the same time. The cylinder 103 pushes the take-up assembly 3 away from the feeding assembly 2 along the first slide 102. The feeding assembly 2 moves under the traction of the protective film. The connecting rod 41 of the rod-type elastic assembly 4 and the first tension spring 42 cooperate to tighten the protective film.

[0056] When the winding assembly 3 moves, it drives the piston-type push-pull member 62 to slide inside the second air cylinder 61, and presses the gas into the first air cylinder 51 through the air guide pipe 63. Under the action of air pressure, the elastic piston member 52 inside the first air cylinder 51 pushes the first shaft 522, causing the pressure roller 532 of the roller pressing member 53 to move down and apply pressure to the protective film.

[0057] Meanwhile, the ion blower assembly 8 blows ionized air onto the surface of the protective film through the tubular dust blower 7 to remove dust and neutralize static electricity. The second motor 32 of the winding assembly 3 drives the winding roller 34 to rotate and wind up the protective film. The industrial inspection camera 101 scans the surface of the protective film during the winding process.

[0058] Through the coordinated work of the above components, the fine scratches on the surface of the protective film are more easily identified by the industrial inspection camera 101 when the film is taut, under pressure, and free from dust and static electricity. This enables accurate detection of defects on the surface of the protective film, ensures the reliability of the test results, and provides strong support for the quality control of the protective film.

[0059] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A defect detection device for a protective film, characterized in that, The system includes a detection base (1), an industrial inspection camera (101), a cylinder (103), a feeding assembly (2), a winding assembly (3), a rod-type elastic assembly (4), a piston-type roller pressing assembly (5), and a push-pull air guiding assembly (6). The detection base (1) has a through-type first slide rail (102). The feeding assembly (2) and the winding assembly (3) slide within the first slide rail (102). A protective film connects the feeding assembly (2) and the winding assembly (3). The industrial inspection camera (101) and the piston-type roller pressing assembly (5) are mounted side-by-side on the detection base (1). Located above the protective film, the rod-type elastic component (4) is connected to one side of the feeding component (2) and the detection seat (1). The cylinder (103) is used to drive the winding component (3) to move within the first slide rail (102). The push-pull air guide component (6) is installed on the other side of the detection seat (1) and connected to the winding component (3). The push-pull air guide component (6) is used to guide gas into the piston-type roller pressing component (5) when the cylinder (103) drives the winding component (3) away from the feeding component (2), so that the piston-type roller pressing component (5) moves under the action of air pressure to apply downward pressure to the protective film.

2. The defect detection device for a protective film according to claim 1, characterized in that, The rod-type elastic component (4) includes a connecting rod (41) and a first tension spring (42). The connecting rod (41) is installed on the side of the feeding component (2). One end of the connecting rod (41) slides through one side of the detection seat (1). The first tension spring (42) is sleeved on the connecting rod (41), and both ends of the first tension spring (42) are connected to the inner wall of one side of the detection seat (1) and the side of the feeding component (2), respectively.

3. The defect detection device for a protective film according to claim 2, characterized in that, The piston-type roller pressing assembly (5) includes a first air cylinder (51). An installation block (105) located above the protective film is installed on the detection seat (1). A through installation hole is opened in the installation block (105). The first air cylinder (51) is vertically installed in the installation hole. An elastic piston (52) is installed in the first air cylinder (51). The bottom end of the elastic piston (52) slides through the bottom end of the first air cylinder (51) and is installed with a roller pressing component (53). The roller pressing component (53) is located above the protective film. A first air hole (511) is opened at the bottom end of the first air cylinder (51). The top end of the first air cylinder (51) is connected to the push-pull air guiding assembly (6).

4. The defect detection device for a protective film according to claim 3, characterized in that, The elastic piston component (52) includes a first piston (521), a first shaft (522), and a second spring (523). The first piston (521) is slidably disposed inside the first air cylinder (51). The first shaft (522) is installed at the bottom of the first piston (521), and the bottom end of the first shaft (522) slides through the bottom end of the first air cylinder (51). The roller pressing component (53) is installed at the bottom end of the first shaft (522). The second spring (523) is sleeved on the first shaft (522), and both ends of the second spring (523) are respectively connected to the inner wall of the bottom end of the first air cylinder (51) and the first piston (521).

5. The defect detection device for a protective film according to claim 4, characterized in that, The roller pressing component (53) includes a U-shaped frame (531) and a pressure roller (532). The U-shaped frame (531) is installed at the bottom end of the first shaft (522), and the pressure roller (532) is rotatably disposed in the middle of the U-shaped frame (531). The pressure roller (532) is located above the protective film.

6. The defect detection device for a protective film according to claim 5, characterized in that, The push-pull air guide assembly (6) includes a second air cylinder (61), which is installed on the other side of the detection seat (1). A piston-type push-pull member (62) is slidably arranged inside the second air cylinder (61), and one end of the piston-type push-pull member (62) is connected to the winding assembly (3). A second air hole (611) is opened at one end of the second air cylinder (61), and the other end is connected to an air guide pipe (63). The end of the air guide pipe (63) away from the second air cylinder (61) is connected to the top of the first air cylinder (51). The piston-type push-pull member (62) includes a second piston (621), which is slidably arranged inside the second air cylinder (61). A second shaft (622) is installed on the side of the second piston (621), and one end of the second shaft (622) slides through one end of the second air cylinder (61) and is connected to the winding assembly (3).

7. The defect detection device for a protective film according to claim 6, characterized in that, The U-shaped frame (531) is equipped with a tubular dust blower (7) located above the pressure roller (532) and facing the protective film. The tubular dust blower (7) is connected to the ion blower assembly (8).

8. The defect detection device for a protective film according to claim 7, characterized in that, The tubular dust blowing component (7) includes a dust blowing pipe (71), which is horizontally installed inside the U-shaped frame (531) and located above the pressure roller (532). Several dust blowing nozzles (72) are connected to the dust blowing pipe (71) and are arranged at intervals and facing the protective film. One end of the dust blowing pipe (71) is connected to the ion fan assembly (8). The ion fan assembly (8) includes an ion fan body (81) and an air supply hose (82). The two ends of the air supply hose (82) are respectively connected to one end of the dust blowing pipe (71) and the air outlet of the ion fan body (81).

9. The defect detection device for a protective film according to claim 8, characterized in that, The feeding assembly (2) includes a first assembly block (21), which is slidably disposed in a first slide rail (102). A first motor (22) is mounted on the back of the first assembly block (21). The output end of the first motor (22) is connected to a first expansion shaft (23) located on the front of the first assembly block (21). A feeding roller (24) is fitted on the first expansion shaft (23). The protective film is wrapped around the feeding roller (24). The other end of the connecting rod (41) and one end of the first tension spring (42) are both connected to the side of the first assembly block (21).

10. A defect detection device for a protective film according to claim 9, characterized in that, The winding assembly (3) includes a second assembly block (31), which is slidably disposed within a first slide rail (102). A cylinder (103) is mounted on the other side of the detection seat (1), and the driving end of the cylinder (103) is connected to the second assembly block (31). The second assembly block (31) is driven by the cylinder (103) to move closer to and further away from the first assembly block (21). A second motor (32) is mounted on the back of the second assembly block (31), and the output end of the second motor (32) is connected to a second expansion shaft (33) located on the front of the second assembly block (31). The second expansion shaft (33) is fitted with a take-up roller (34), one end of the protective film is connected to the take-up roller (34), the detection seat (1) has a second slide (104) that passes through and is located above the first slide (102), the bottom of the second slide (104) has a sliding opening that communicates with the first slide (102), the second assembly block (31) is fitted with a slider (35) that is located in the second slide (104) and slides in cooperation with the sliding opening, and one end of the second shaft (622) extends into the second slide (104) and is connected to the slider (35).

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