A new material high air permeability winding film light detection device

Abstract

The application discloses a new material high-air-permeability wrapping film light detection device and belongs to the technical field of light detection. The new material high-air-permeability wrapping film light detection device comprises a detection box, a light beam emitter and a light beam receiver are arranged in the detection box, a through groove is formed in the side surface of the detection box, a fixed frame is slidably connected to the inside of the detection box and the through groove, a movable plate is slidably connected to the inside of the fixed frame, a rotating rod is rotatably connected to the inner side of the fixed frame, a sticky roller and a gear are fixedly arranged on the outer wall of the rotating rod, and a toothed plate is fixedly connected to the inner side of the movable plate. The application realizes automatic compression of the arc-shaped pressing plate on the end of the wrapping film, simultaneously realizes reverse rotation of the sticky roller to tension the wrapping film, effectively ensures that the wrapping film always keeps a tensioned and flat state in the detection area, avoids wrinkles from shielding light and interfering with the detection precision, significantly improves the accuracy and reliability of the air permeability detection result, and improves the detection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of light detection technology, specifically relating to a light detection device for a novel high-permeability wrapping film. Background Technology

[0002] Illumination testing is a core testing step in the production of high-permeability stretch film for new materials, evaluating its air permeability and optical uniformity, directly affecting the quality judgment of the finished stretch film. Most existing stretch film illumination testing devices suffer from inconvenient sample positioning. During testing, the stretch film is easily affected by external forces, causing it to shift or loosen. This not only leads to larger errors in the test results but may also result in samples falling off and obstructing the testing light path. Furthermore, changing the sample involves cumbersome disassembly and repositioning steps, resulting in low testing efficiency and failing to meet the rapid testing needs of batches of samples in large-scale production.

[0003] Publication No. CN 219871084 U discloses a light-emitting detection device for high-permeability stretch film, relating to the field of stretch film light transmittance detection technology. The device includes a housing, inside which a beam emitter and a beam receiver are fixedly installed. A fixing mechanism is inserted into the inner wall of the housing. A movable frame is fixedly installed on the surface of the fixing mechanism, and a fixing frame is fixedly installed on the inner wall of the movable frame. A fixing pressure frame is snapped into the inside of the fixing frame.

[0004] The aforementioned device uses a fixed pressure frame to press the edge of the wrapping film to achieve fixation, which cannot apply an outward stretching force to the wrapping film. Therefore, when the wrapping film itself is curled, loose, or wrinkled, the pressure frame cannot flatten it, which will result in tiny wrinkles or uneven areas on the surface of the area to be tested of the wrapping film. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a light detection device for a novel high-permeability wrapping film, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides a light detection device for a novel high-permeability wrapping film, comprising a detection box, wherein a beam emitter and a beam receiver are assembled inside the detection box; The side of the testing box has a through groove. A fixed frame is slidably connected inside the testing box and the through groove. A movable plate is slidably connected inside the fixed frame. A rotating rod is rotatably connected to the inner side of the fixed frame. A sticking roller and a gear are fixedly sleeved on the outer wall of the rotating rod. A toothed plate is fixedly connected to the inner side of the movable plate. A fixed shaft is fixedly connected to the outer wall of the rotating rod. An arc-shaped pressure plate is fixedly connected to the outer wall of the fixed shaft. A rotating shaft rotatably passes through one side of the fixed frame. An L-shaped block is fixedly connected to the outer side of the fixed frame. An L-shaped plate is fixedly connected to the outer wall of the testing box. A movable cylinder rotatably passes through one side of the L-shaped block. A rotating block is fixedly connected to the end of the rotating shaft located inside the fixed frame. A spiral groove is formed on the outer wall of the rotating shaft. A cylindrical block is rotatably connected to the inner wall of the movable cylinder. The cylindrical block is slidably connected inside the spiral groove.

[0007] As a further description of the above technical solution: The outer wall of the testing box is fixedly connected to a slide rail, and the fixed frame is slidably connected to the outer wall of the slide rail.

[0008] As a further description of the above technical solution: A spring A is fixedly connected to the outer wall of the rotating rod, and the other end of the spring A is fixedly connected to the arc-shaped pressure plate.

[0009] As a further description of the above technical solution: A telescopic rod is fixedly connected to the inner wall of the fixed frame, and a spring B is movably sleeved on the outer wall of the telescopic rod. The two ends of the spring B are fixedly connected to the fixed frame and the movable plate, respectively.

[0010] As a further description of the above technical solution: One end of the rotating shaft is fixedly connected to a spring C, and the other end of the spring C is fixedly connected to the inner wall of the moving cylinder. This enables the arc-shaped pressure plate to automatically press the end of the wrapping film, while the adhesive roller rotates in the opposite direction to tighten the wrapping film. This effectively ensures that the wrapping film remains taut and flat within the detection area, avoiding wrinkles that block light and interfere with detection accuracy. This significantly improves the accuracy and reliability of the air permeability test results and increases detection efficiency.

[0011] As a further description of the above technical solution: A fixed rod is fixedly connected to the bottom inner side of the fixed frame, a sliding rod is slidably connected to the outer wall of the fixed rod, a ring is fixedly connected to the end of the sliding rod away from the fixed rod, a conical block is fixedly connected to the bottom of the arc-shaped pressure plate, and a trapezoidal block is fixedly connected to the inner wall of the movable plate.

[0012] As a further description of the above technical solution: The upper end of the trapezoidal block near the slide bar is set as an inclined surface, and the bottom of the slide bar near the trapezoidal block is set as an arc. When the movable plate moves inward, it drives the trapezoidal block to move synchronously. Its inclined surface presses against the arc bottom end of the slide bar, causing it to slide upward along the fixed rod. This drives the ring to rise and push against the conical surface of the conical block, causing the arc-shaped pressure plate to move further horizontally towards the sticking roller and tighten. This achieves the effect of the auxiliary spring A enhancing the pressing effect of the end of the wrapping film and pulling the loose wrapping film towards the center of the detection area, effectively preventing the end of the wrapping film from becoming loose and slipping during the detection process.

[0013] As a further description of the above technical solution: A pull rod is rotatably connected to the outer wall of the fixed frame, and a connecting rod A is fixedly connected to the outer wall of the pull rod. Connecting rod B is hinged to the end of connecting rod A away from the pull rod via a pin, and a sliding sleeve is hinged to the other end of connecting rod B. A vertical rod is fixedly connected to the upper end of the detection box, and a horizontal rod is slidably connected to the outer wall of the vertical rod. Two positioning rods are fixedly connected to the bottom of the horizontal rod, and two positioning holes are provided on the top of the fixed frame. This design achieves automatic unlocking when the fixed frame is moved out and automatic locking when pushed in, effectively preventing displacement of the fixed frame due to vibration or accidental contact during the detection process, which could affect the beam alignment accuracy. It improves the positioning reliability and operational convenience of the fixed frame, ensures the consistency of position between multiple tests, and enhances the repeatability of the test results. As a further description of the above technical solution: The upper end of the testing box has a through hole of the same size as the positioning hole, and the diameter of the positioning rod matches the diameter of the positioning hole.

[0014] The advantages of this application are: (1) This application realizes that the arc-shaped pressure plate automatically presses the end of the wrapping film, while the adhesive roller rotates in the opposite direction to tighten the wrapping film, which effectively ensures that the wrapping film always maintains a taut and flat state in the detection area, avoids wrinkles blocking light and interfering with the detection accuracy, significantly improves the accuracy and reliability of the air permeability detection results, and improves the detection efficiency.

[0015] (2) When the movable plate moves inward, it drives the trapezoidal block to move synchronously. Its inclined surface presses the arc-shaped bottom end of the slide rod, causing it to slide upward along the fixed rod, which drives the ring to rise and push the conical surface of the conical block, so that the arc-shaped pressure plate moves horizontally and tightens further towards the sticking roller. This achieves the effect of the auxiliary spring A to enhance the pressing effect of the end of the wrapping film and pull the loose wrapping film towards the middle of the detection area, effectively avoiding the loosening and slipping of the end of the wrapping film during the detection process.

[0016] (3) This application realizes automatic unlocking when the fixed frame is moved out and automatic locking after being pushed in, which effectively avoids the fixed frame displacement caused by vibration or accidental touch during the detection process, thus affecting the beam alignment accuracy, improving the positioning reliability and operation convenience of the fixed frame, ensuring the consistency of position between multiple detections, and enhancing the repeatability of the detection results. Attached Figure Description

[0017] Figure 1 This is an overall diagram of the invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a partial cross-section of the present invention. Figure 1 ; Figure 4 This is the invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a partial cross-section of the present invention. Figure 2 ; Figure 6 This is the invention Figure 5 Enlarged view at point B in the middle; Figure 7 This is a side sectional view of the present invention; Figure 8 This is the invention Figure 7 Enlarged view of point C in the middle.

[0018] Explanation of key figure labels: 1. Detection box; 2. Beam emitter; 3. Beam receiver; 41. Fixed frame; 42. Movable plate; 43. Rotating rod; 44. Gear; 45. Toothed plate; 46. Adhesive roller; 47. Fixed shaft; 48. Arc-shaped pressure plate; 49. Rotating shaft; 410. L-shaped block; 411. Moving cylinder; 412. Rotating block; 413. Spiral groove; 414. Cylindrical block; 415. L-shaped plate; 416. Slide rail; 417. Spring A; 418. Telescopic rod; 419. Spring B; 420. Spring C; 51. Fixed rod; 52. Sliding rod; 53. Ring; 54. Conical block; 55. Trapezoidal block; 61. Pull rod; 62. Connecting rod A; 63. Connecting rod B; 64. Sliding sleeve; 65. Vertical rod; 66. Horizontal rod; 67. Positioning rod; 68. Positioning hole. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0020] Example 1, as Figures 1-8 As shown, a light detection device for a new type of high-permeability wrapping film includes a detection box 1, and a beam emitter 2 and a beam receiver 3 are installed inside the detection box 1. A through slot is provided on the side of the testing box 1. A fixed frame 41 is slidably connected inside the testing box 1 and the through slot. A movable plate 42 is slidably connected inside the fixed frame 41. A rotating rod 43 is rotatably connected to the inner side of the fixed frame 41. A sticking roller 46 and a gear 44 are fixedly sleeved on the outer wall of the rotating rod 43. A toothed plate 45 is fixedly connected to the inner side of the movable plate 42. A fixed shaft 47 is fixedly connected to the outer wall of the rotating rod 43. An arc-shaped pressure plate 48 is fixedly connected to the outer wall of the fixed shaft 47. One side of the fixed frame 41... A rotating shaft 49 is rotatably connected to the side of the fixed frame 41. An L-shaped block 410 is fixedly connected to the outside of the fixed frame 41. An L-shaped plate 415 is fixedly connected to the outer wall of the detection box 1. A movable cylinder 411 is rotatably connected to one side of the L-shaped block 410. A rotating block 412 is fixedly connected to one end of the rotating shaft 49 located inside the fixed frame 41. A spiral groove 413 is opened on the outer wall of the rotating shaft 49. A cylindrical block 414 is rotatably connected to the inner wall of the movable cylinder 411. The cylindrical block 414 is slidably connected inside the spiral groove 413.

[0021] The outer wall of the test box 1 is fixedly connected to a slide rail 416, and the fixed frame 41 is slidably connected to the outer wall of the slide rail 416. By setting the slide rail 416, the fixed frame 41 can slide smoothly in a straight line when it is pulled out or pushed into the test box 1, so as to avoid the fixed frame 41 from shifting or getting stuck during the movement, and ensure that the fixed frame 41 can accurately reset to the test position every time.

[0022] A spring A417 is fixedly connected to the outer wall of the rotating rod 43. The other end of the spring A417 is fixedly connected to the arc-shaped pressure plate 48. By setting the spring A417, a continuous elastic clamping force is provided when the arc-shaped pressure plate 48 presses the end of the wrapping film, so that the arc-shaped pressure plate 48 can adapt to wrapping films of different thicknesses and maintain a stable clamping pressure.

[0023] A telescopic rod 418 is fixedly connected to the inner wall of the fixed frame 41, and a spring B419 is movably sleeved on the outer wall of the telescopic rod 418. The two ends of the spring B419 are fixedly connected to the fixed frame 41 and the movable plate 42 respectively. By setting the telescopic rod 418 and the spring B419, guidance and buffering are provided when the movable plate 42 is pushed outward by the rotating block 412.

[0024] One end of the rotating shaft 49 is fixedly connected to a spring C420, and the other end of the spring C420 is fixedly connected to the inner wall of the moving cylinder 411. By setting the spring C420, when the fixed frame 41 is pulled out of the detection box 1 and the moving cylinder 411 is limited by the L-shaped plate 415, the spring C420 is compressed and stores energy. When the fixed frame 41 is released, the spring C420 automatically rebounds and pushes the moving cylinder 411 to reset, realizing the automatic reverse reset of the rotating shaft 49 and the rotating block 412. In this embodiment, the arc-shaped pressure plate 48 automatically presses the end of the wrapping film, while the adhesive roller 46 rotates in the opposite direction to tighten the wrapping film, effectively ensuring that the wrapping film always remains taut and flat in the detection area, avoiding wrinkles from blocking light and interfering with the detection accuracy, significantly improving the accuracy and reliability of the air permeability detection results, and increasing the detection efficiency.

[0025] When the above equipment is used to perform light-based testing on the stretch film, the fixing frame 41 is first pulled out of the testing box 1 by the pull rod 61. When the fixing frame 41 is removed from the testing box 1, it will slide outward on the outer wall of the slide rail 416. Then, the L-shaped block 410 on its outer wall and the moving cylinder 411 will move together. After the fixing frame 41 has moved a certain distance and completely left the testing box 1, the moving cylinder 411 will contact the inner side of the L-shaped plate 415. At this time, if the fixing frame 41 is pulled again, the moving cylinder 411 will move towards the fixing frame 41 on the outer wall of the rotating shaft 49. Since the cylindrical block 414 on the inner wall of the movable cylinder 411 slides in the spiral groove 413 on the outer wall of the rotating shaft 49, when the movable cylinder 411 moves, it will drive the rotating shaft 49 to rotate under the cooperation of the cylindrical block 414 and the spiral groove 413. In turn, the rotating shaft 49 will drive the rotating block 412 located at one end of the fixed frame 41 to rotate. The end of the rotating block 412 away from the rotating shaft 49 rotates towards the movable plate 42. When the rotating block 412 contacts the movable plate 42 and continues to rotate, it will cause the movable plate 42 to slide outward, thereby stretching the telescopic rod 418. In turn, stretching the telescopic rod 418 and compressing the spring B419, the toothed plate 45 on the inner side of the movable plate 42 moves synchronously. During the movement, the toothed plate 45 drives the gear 44 that meshes with it to rotate. In turn, the gear 44 drives the rotating rod 43 to rotate inside the fixed frame 41. At this time, the end of the wrapping film to be tested is placed between the adhesive roller 46 and the arc-shaped pressure plate 48. Then, the tension on the fixed frame 41 is released. After the L-shaped plate 415 releases the limit on the moving cylinder 411, the spring C420 rebounds and pushes the moving cylinder 411 to reset. During the movement of the moving cylinder 411, the rotating shaft 49 is still rotated in the opposite direction through the cooperation of the cylindrical block 414 and the spiral groove 413, so that the rotating block 412 is reset and releases the pressure on the movable plate 42. At the same time, the spring B419 rebounds and pushes the movable plate 42 to reset, which in turn drives the toothed plate 45 to reset, and drives the gear 44 and the rotating rod 43 to rotate in the opposite direction. Under the elastic force of the spring A417, the arc-shaped pressure plate 48 adheres and presses the end of the wrapping film. When the adhesive roller 46 rotates in the opposite direction, it can pull the two ends of the wrapping film to both sides, so that the wrapping film to be tested is kept taut and flat, avoiding wrinkles from blocking light and interfering with the detection accuracy. After the wrapping film is fixed, the fixing frame 41 is pushed back into the testing box 1, so that the area to be tested is between the beam emitter 2 and the beam receiver 3. After the equipment is started, the beam emitter 2 emits a standard testing beam. The beam passes through the wrapping film and is received by the beam receiver 3. The processor can calculate the actual air permeability of the wrapping film based on the light flux parameters collected by the beam receiver 3, and complete the testing operation.

[0026] Example 2, as Figure 6 As shown, based on Embodiment 1, a fixed rod 51 is fixedly connected to the bottom inner side of the fixed frame 41, a sliding rod 52 is slidably connected to the outer wall of the fixed rod 51, a ring 53 is fixedly connected to the end of the sliding rod 52 away from the fixed rod 51, a conical block 54 is fixedly connected to the bottom of the arc-shaped pressure plate 48, and a trapezoidal block 55 is fixedly connected to the inner wall of the movable plate 42.

[0027] The upper end of the trapezoidal block 55 near the slide rod 52 is set as an inclined surface, and the bottom of the slide rod 52 near the trapezoidal block 55 is set as an arc. By setting the contact surface of the trapezoidal block 55 as an inclined surface and the bottom end of the slide rod 52 as an arc, the inclined surface of the trapezoidal block 55 can smoothly push the slide rod 52 upward along the fixed rod 51 when the movable plate 42 moves inward. In this embodiment, when the movable plate 42 moves inward, it drives the trapezoidal block 55 to move synchronously. Its inclined surface presses the arc bottom end of the slide rod 52, causing it to slide upward along the fixed rod 51. This drives the ring 53 to rise and push the conical surface of the conical block 54, causing the arc-shaped pressure plate 48 to move further horizontally towards the sticking roller 46 and tighten. This achieves the effect of the auxiliary spring A417 enhancing the pressing effect of the end of the wrapping film and pulling the loose wrapping film towards the center of the detection area, effectively preventing the end of the wrapping film from becoming loose and slipping during the detection process.

[0028] In practical use, when the movable plate 42 moves inward toward the fixed frame 41, it will drive the trapezoidal block 55 to move inward synchronously. The inclined surface of the trapezoidal block 55 will gradually squeeze the arc-shaped bottom end of the slide rod 52, overcoming the weight of the slide rod 52 and pushing the slide rod 52 to slide upward along the fixed rod 51. This will drive the top ring 53 to rise synchronously. During the lifting process, the ring 53 will squeeze the conical surface of the push-pull conical block 54, driving the arc-shaped pressure plate 48 to move horizontally and tighten further toward the adhesive roller 46. This can not only help the spring A417 to better press and fix the end of the wrapping film, avoiding the end of the wrapping film from becoming loose and slipping during the test, but also cooperate with the tensioning action of the adhesive roller 46 on the wrapping film, further pulling the loose wrapping film toward the center of the test area, strengthening the tension and flatness effect of the wrapping film in the section to be tested, and avoiding wrinkles from blocking light to a greater extent, thus further improving the accuracy of the air permeability test results.

[0029] Example 3, as Figure 5 and Figure 7 As shown, based on Embodiment 1 or Embodiment 2, a pull rod 61 is rotatably connected to the outer wall of the fixed frame 41, a connecting rod A62 is fixedly connected to the outer wall of the pull rod 61, a connecting rod B63 is hinged to the end of the connecting rod A62 away from the pull rod 61 through a pin, a sliding sleeve 64 is hinged to the other end of the connecting rod B63, a vertical rod 65 is fixedly connected to the upper end of the detection box 1, a horizontal rod 66 is slidably connected to the outer wall of the vertical rod 65, two positioning rods 67 are fixedly connected to the bottom of the horizontal rod 66, and two positioning holes 68 are opened at the top of the fixed frame 41.

[0030] The upper end of the testing box 1 has a through hole of the same size as the positioning hole 68. The diameter of the positioning rod 67 matches the diameter of the positioning hole 68. By setting the diameter of the positioning rod 67 to match the diameter of the positioning hole 68, a precise fit can be formed after the positioning rod 67 is inserted into the positioning hole 68, effectively limiting the forward and backward movement or left and right displacement of the fixed frame 41 during the testing process. This embodiment realizes automatic unlocking when the fixed frame 41 is moved out and automatic locking when it is pushed in, effectively avoiding the displacement of the fixed frame 41 due to vibration or accidental contact during the testing process, which would affect the beam alignment accuracy. This improves the positioning reliability and operation convenience of the fixed frame 41, ensures the consistency of position between multiple tests, and enhances the repeatability of the test results.

[0031] When the above equipment is used, if it is necessary to pull the fixed frame 41 outward, first rotate the pull rod 61 to make one end of the connecting rod A62 rotate around it, so that the other end of the connecting rod A62 drives the connecting rod B63 to swing upward. The connecting rod B63 pushes the hinged sliding sleeve 64 to slide upward along the vertical rod 65. The sliding sleeve 64 is fixedly connected to the side wall of the horizontal rod 66. Therefore, when the sliding sleeve 64 slides upward, it will drive the horizontal rod 66 to move upward along the vertical rod 65 at the same time, so that the positioning rod 67 at the bottom of the horizontal rod 66, located on the upper side of the detection box 1, is completely disengaged from the positioning hole 68 on the side of the fixed frame 41 away from the rotating shaft 49, thus releasing the movement restriction on the fixed frame 41. At this time, the fixed frame 41 can be smoothly pulled outward to the outside of the detection box 1, which makes it convenient for the operator to take out the completed wrapping film and place the new wrapping film to be tested. When the fixed frame 41 is pulled to the outermost operating position, the pull rod 61 is released, which will drive the connecting rod A62 to reset and pull it down, and drive the connecting rod B63 to pull the sliding sleeve 64 to slide down along the vertical rod 65, thereby driving the horizontal rod 66 and the positioning rod 67 to move down synchronously, so that the positioning rod 67 located on the outside of the detection box 1 is inserted into the positioning hole 68 on the side of the fixed frame 41 away from the detection box 1.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A light-emitting detection device for a novel high-permeability stretch film, comprising a detection box, characterized in that, The detection box is equipped with a beam emitter and a beam receiver. The side of the testing box has a through groove. A fixed frame is slidably connected inside the testing box and the through groove. A movable plate is slidably connected inside the fixed frame. A rotating rod is rotatably connected to the inner side of the fixed frame. A sticking roller and a gear are fixedly sleeved on the outer wall of the rotating rod. A toothed plate is fixedly connected to the inner side of the movable plate. A fixed shaft is fixedly connected to the outer wall of the rotating rod. An arc-shaped pressure plate is fixedly connected to the outer wall of the fixed shaft. A rotating shaft rotatably passes through one side of the fixed frame. An L-shaped block is fixedly connected to the outer side of the fixed frame. An L-shaped plate is fixedly connected to the outer wall of the testing box. A movable cylinder rotatably passes through one side of the L-shaped block. A rotating block is fixedly connected to the end of the rotating shaft located inside the fixed frame. A spiral groove is formed on the outer wall of the rotating shaft. A cylindrical block is rotatably connected to the inner wall of the movable cylinder. The cylindrical block is slidably connected inside the spiral groove.

2. The light detection device for a novel high-permeability wrapping film according to claim 1, characterized in that, The outer wall of the testing box is fixedly connected to a slide rail, and the fixed frame is slidably connected to the outer wall of the slide rail.

3. The light detection device for a novel high-permeability wrapping film according to claim 2, characterized in that, A spring A is fixedly connected to the outer wall of the rotating rod, and the other end of the spring A is fixedly connected to the arc-shaped pressure plate.

4. The light detection device for a novel high-permeability wrapping film according to claim 3, characterized in that, A telescopic rod is fixedly connected to the inner wall of the fixed frame, and a spring B is movably sleeved on the outer wall of the telescopic rod. The two ends of the spring B are fixedly connected to the fixed frame and the movable plate, respectively.

5. The light detection device for a novel high-permeability wrapping film according to claim 4, characterized in that, One end of the rotating shaft is fixedly connected to a spring C, and the other end of the spring C is fixedly connected to the inner wall of the moving cylinder.

6. The light detection device for a novel high-permeability wrapping film according to claim 5, characterized in that, A fixed rod is fixedly connected to the bottom inner side of the fixed frame, a sliding rod is slidably connected to the outer wall of the fixed rod, a ring is fixedly connected to the end of the sliding rod away from the fixed rod, a conical block is fixedly connected to the bottom of the arc-shaped pressure plate, and a trapezoidal block is fixedly connected to the inner wall of the movable plate.

7. The light detection device for a novel high-permeability wrapping film according to claim 6, characterized in that, The upper end of the trapezoidal block near the slide bar is set as an inclined surface, and the bottom of the slide bar near the trapezoidal block is set as an arc.

8. The light detection device for a novel high-permeability wrapping film according to claim 7, characterized in that, A pull rod is rotatably connected to the outer wall of the fixed frame. A connecting rod A is fixedly connected to the outer wall of the pull rod. A connecting rod B is hinged to the end of the connecting rod A away from the pull rod via a pin. A sliding sleeve is hinged to the other end of the connecting rod B. A vertical rod is fixedly connected to the upper end of the detection box. A horizontal rod is slidably connected to the outer wall of the vertical rod. Two positioning rods are fixedly connected to the bottom of the horizontal rod. Two positioning holes are opened at the top of the fixed frame.

9. The light detection device for a novel high-permeability wrapping film according to claim 8, characterized in that, The upper end of the testing box has a through hole of the same size as the positioning hole, and the diameter of the positioning rod matches the diameter of the positioning hole.

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