An anti-static fixing clamp for super-wide optical film appearance detection

Abstract

The utility model discloses a kind of super wide optical film appearance detection anti-static fixed clamps, comprising: composite clamp body, for clamping optical film to carry out appearance detection;Composite clamp body includes holding handle, holding handle is rotatably connected by connecting pivot, holding handle end is provided with wide clamping arm, and wide clamping arm end is provided with metal wire along holding handle inside extension, so that holding handle can be rotatably controlled wide clamping arm opening and closing by connecting pivot, and static charge is discharged by metal wire.The utility model, simple structure, convenient operation, strong adaptability, when fixed or turned over in detection to film material, static charge generated by film surface friction is transferred to metal wire by the non-electrostatic end of holding handle end wide clamping arm, after metal wire, it is released by metal clamp ground connection, effectively reduce film surface residual static voltage and dust adsorption defect rate, to improve the detection accuracy of detection equipment to defect.

Description

Technical Field

[0001] This utility model relates to the field of electrostatic fixing clip technology, specifically to an antistatic fixing clip for ultra-wide optical film appearance inspection. Background Technology

[0002] In the industrial production process of ultra-wide optical films such as diffusion films, brightness enhancement films, and anti-glare films, film surface appearance inspection is a key link to ensure product quality. Its core objective is to accurately identify various surface defects such as scratches, dirt, and bubbles, and to prevent unqualified products from flowing into downstream application stages.

[0003] Most existing optical film clamps are small, insulated mechanical clamps made of insulating materials. When fixing or turning the film during testing, they easily generate a large amount of static electricity due to friction. Because the film is wide, the charge distribution is uneven and the static electricity accumulation effect is stronger, with a significant potential difference between the edge and the center. Therefore, existing clamps cannot achieve effective and uniform charge release, causing static electricity to attract dust from the air and contaminate the clean film surface, resulting in poor appearance. This seriously interferes with the accurate identification and judgment of defects by the testing equipment, leading to misjudgment of qualified products or missed judgment of unqualified products. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-static fixing clip for ultra-wide optical film appearance inspection in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including: Composite clamping body, used to hold optical films for appearance inspection; The composite clamp includes a grip handle, which is rotatably connected via a connecting pivot. At least one set of grip handle ends are provided with wide clamping arms. The ends of the wide clamping arms are provided with metal wires extending along the inside of the grip handle, so that the grip handle can control the opening and closing of the wide clamping arms by rotating the connecting pivot, and conduct electrostatic charge through the metal wires.

[0006] As a further description of the above technical solution, the grip handle includes a curved portion, and a wiring groove is formed on the inner side of the curved portion along the edge contour.

[0007] As a further description of the above technical solution, a rotating hole is provided in the middle of the grip handle, and a connecting pivot is inserted into the rotating hole.

[0008] As a further description of the above technical solution, the end of the grip handle is provided with a wiring hole, through which a metal wire passes.

[0009] As a further description of the above technical solution, the wide clamping arm includes a clamping part, and a connecting ring is provided on the non-electrostatic end of the clamping part extending along the edge contour.

[0010] As a further description of the above technical solution, one end of the metal wire is connected to the connecting ring of the wide clamp arm.

[0011] As a further description of the above technical solution, the other end of the metal wire is led out from the wiring hole at the tail of the grip handle along the wiring groove and grounded.

[0012] As a further description of the above technical solution, the end of the metal wire is provided with a grounding terminal, which is a metal clip.

[0013] As a further description of the above technical solution, the grip handle is made of nylon, the wide clamp arm is made of carbon black filled conductive rubber, and the metal wire is made of tin-plated copper wire.

[0014] As a further description of the above technical solution, the width of the wide clamping arm is greater than the width of the grip handle, and the width of the wide clamping arm is 5-15% of the width of the detection membrane.

[0015] The beneficial effects of this utility model are as follows: This invention features a simple structure, convenient operation, and strong adaptability. When the membrane material is fixed or flipped during testing, the electrostatic charge generated by friction on the membrane surface is transferred to the metal wire through the non-static end of the wide clamp arm at the end of the handle. After passing through the metal wire, the charge is released to the ground via the metal clamp, effectively reducing the residual electrostatic voltage on the membrane surface and the defect rate of dust adsorption, thereby improving the accuracy of the testing equipment in detecting defects.

[0016] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the antistatic fixing clip of this utility model; Figure 2 This is a cross-sectional schematic diagram of the antistatic fixing clip of this utility model.

[0018] Figure label: 1. Composite clamp body; 2. Grip handle; 21. Bowed part; 22. Cable routing groove; 23. Rotating hole; 24. Cable routing hole; 3. Connecting pivot; 4. Wide clamping arm; 41. Clamping part; 42. Connecting ring; 5. Metal wire; 6. Grounding terminal. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figures 1-2 As shown, in one embodiment, an anti-static fixing clip for ultra-wide optical film appearance inspection includes: an anti-static fixing clip for ultra-wide optical film appearance inspection, including: a composite clamp 1 for clamping the optical film for appearance inspection, which has both clamping function and anti-static performance, and is specially adapted to the appearance inspection scenarios of ultra-wide optical films such as diffusion film, brightness enhancement film, and anti-glare film. The composite clamp 1 includes a grip handle 2, which is rotatably connected to a connecting pivot 3 to form an opening and closing mechanism. This allows the operator to precisely control the opening and closing of the wide clamp arm 4 by manipulating the grip handle 2 around the connecting pivot 3, thereby achieving stable clamping and convenient loading and unloading of the ultra-wide membrane material. Correspondingly, at least one set of grip handles 2 is provided with a wide clamping arm 4 at the end, and a metal wire 5 is built into the end of the wide clamping arm 4 along the internal extension direction of the grip handle 2. The metal wire 5 and the wide clamping arm 4 form a conductive path, so that the electrostatic charge generated by the contact friction between the film material and the clamping arm can be quickly conducted to the metal wire 5 through the wide clamping arm 4, thereby achieving directional release.

[0021] In some embodiments, the handle 2 is made of materials such as nylon, which possesses excellent insulation properties to prevent electric shock risks to operators during use. It also exhibits good mechanical strength, wear resistance, and fatigue resistance, enabling it to withstand high-frequency opening and closing operations in industrial production environments. Simultaneously, the lightweight nature of nylon reduces operator fatigue, and its good processability facilitates the integrated processing of subsequent structures such as the wiring channel 22 and rotating hole 23, balancing practicality and production feasibility. Besides nylon, other polymer materials with similar insulation properties, mechanical strength, and processing characteristics can be selected according to the specific application scenario, ensuring that the handle 2 provides a reliable mounting and protective carrier for the internal metal wires 5 while ensuring ease of operation.

[0022] In some embodiments, to balance conductivity and film protection requirements, the wide-width clamping arm 4 is preferably made of a composite conductive material such as conductive rubber, conductive foam, or carbon black-filled conductive rubber. This type of material not only possesses stable conductivity, enabling rapid conduction of electrostatic charges on the film surface, but also exhibits soft physical properties, allowing for flexible contact during clamping and effectively preventing scratches, indentations, and other damage to the precision surface of the ultra-wide optical film. Simultaneously, its excellent elasticity and deformation capability can adapt to film materials of different thicknesses, ensuring the stability and reliability of clamping. Furthermore, carbon black-filled conductive rubber also possesses excellent wear resistance and environmental adaptability, maintaining stable conductivity and mechanical properties during long-term use, further extending the service life of the clamp. In some embodiments, the clamping surface of the wide clamping arm 4 is designed as a rectangular plane adapted to the edge of the ultra-wide membrane material. This design increases the contact area between the clamping arm and the membrane material, ensuring uniform distribution of clamping force and preventing excessive local pressure that could lead to membrane deformation. A layer of conductive rubber or conductive foam can be completely wrapped around the clamping surface to achieve rapid electrostatic conduction through full contact, while the material's softness protects the membrane surface. Alternatively, metal strips or sheets can be embedded inside the clamping surface, evenly distributed along the length of the rectangular plane. This ensures conductivity while reducing wear on the clamping surface through point contact between the metal and the membrane material, extending the clamping arm's service life. Both design schemes can achieve electrostatic conduction and can be flexibly selected based on the membrane material type, detection accuracy requirements, and application scenario, ensuring efficient antistatic performance without damaging the membrane material.

[0023] In some embodiments, the metal wire 5 is made of tin-plated copper wire or other metals, which has excellent conductivity and can realize the rapid transmission of electrostatic charge. The tin plating layer on its surface can also effectively improve the oxidation resistance and corrosion resistance of the wire, avoiding the decline in conductivity due to oxidation and rust during long-term use. It also has good flexibility and bendability, making it easy to arrange in the wiring groove 22 inside the grip handle 2. It also has moderate mechanical strength and is not easy to break due to frequent opening and closing operations. In addition, according to the conductivity requirements of the actual application scenario, cost budget and other factors, other metal materials with good conductivity such as copper wire and aluminum wire can be selected to ensure that the wire can stably receive and conduct the electrostatic charge transmitted by the wide clamp arm 4.

[0024] In some embodiments, the handle 2 is designed as an ergonomically curved section 21. The curvature of the curved section 21 adapts to the operator's hand grip posture, increasing the contact area between the hand and the handle, dispersing grip pressure, and improving comfort during long-term operation. To achieve a neat arrangement of the metal wire 5, a dedicated cable routing groove 22 is provided on the inner side of the curved section 21 along its edge contour. The width and depth of the cable routing groove 22 are precisely designed according to the diameter of the metal wire 5, ensuring that the wire can be tightly fitted into the groove, avoiding problems such as wire tangling, wear, or detachment during the opening and closing of the handle. At the same time, the closed design of the cable routing groove 22 can effectively protect the metal wire 5, preventing external dust and impurities from entering and causing poor wire contact, and facilitating subsequent maintenance and replacement, further improving the reliability of the fixing clip.

[0025] In some embodiments, a rotating hole 23 is precisely formed in the middle of the grip handle 2. The diameter of the rotating hole 23 fits tightly with the outer diameter of the connecting pivot 3, ensuring that the connecting pivot 3 can be smoothly inserted without significant gaps. The connecting pivot 3 is made of high-strength metal material, and its two ends are fixed by nuts or buckles, allowing the two grip handles 2 to rotate flexibly and stably around the connecting pivot 3, thereby controlling the opening and closing angle of the wide clamping arm 4. The inner wall of the rotating hole 23 is precision machined, with a smooth surface free of burrs, which reduces frictional resistance with the connecting pivot 3, improves the smoothness of rotation, and reduces wear during long-term use, extending the service life of the clamp. The matching design of the connecting pivot 3 and the rotating hole 23 ensures that the wide clamping arm 4 can maintain synchronous movement during opening and closing, achieving uniform clamping of the ultra-wide membrane material.

[0026] In some embodiments, a wiring hole 24 is specially provided at the tail of the handle 2. The position of the wiring hole 24 is precisely aligned with the end of the wiring groove 22 on the inner side of the bowed part 21 to form a complete wire guide channel. The diameter of the wiring hole 24 is slightly larger than the diameter of the metal wire 5, which can ensure that the wire passes through smoothly and avoid the wire from shaking in the hole due to excessive diameter. This prevents the insulation layer from being damaged due to friction during the installation or use of the wire, which could cause short circuits or poor conductivity, and ensures the continuity and reliability of the electrostatic conduction path.

[0027] In some embodiments, the wide clamping arm 4 includes a clamping portion 41 that is in direct contact with the membrane material. A connecting ring 42 is integrally provided along the edge contour of the non-electrostatic contact end of the clamping portion 41 (i.e. the end away from the membrane material clamping surface). This provides a stable interface for the conductive connection between the metal wire 5 and the wide clamping arm 4, avoids the wire from being directly wrapped around the clamping arm and causing poor contact, and facilitates the disassembly and replacement of the wire, thereby improving the maintenance convenience of the fixing clamp.

[0028] In some embodiments, one end of the metal wire 5 is fixed to the connecting ring 42 of the wide clamping arm 4 using a reliable conductive connection method, which can be achieved by welding, crimping, or fastening bolts. If welding is used, solder that matches the wire material can be selected to ensure that the welding point is firm and has good conductivity, avoiding problems such as poor welding or desoldering. If crimping is used, the wire and the connecting ring 42 are tightly crimped together using a special crimping tool to form a dual mechanical and electrical connection. This method is convenient to operate and highly stable, ensuring that a low-resistance conductive path is formed between the metal wire 5 and the wide clamping arm 4, so that the electrostatic charge generated by the membrane material can be conducted to the metal wire 5 without loss.

[0029] In some embodiments, the other end of the metal wire 5 extends along the wiring groove 22 inside the curved part 21 of the handle 2, and passes through the wiring hole 24 at the tail of the handle to achieve grounding; it can be flexibly selected according to the actual environment of the testing site, such as directly connecting to the grounding terminal of the testing equipment, the workshop grounding trunk line or a special grounding pin, to ensure that the electrostatic charge can be quickly conducted to the ground through the metal wire 5, fundamentally eliminating the accumulation of static electricity on the surface of the membrane material and avoiding problems such as static electricity adsorption of dust.

[0030] In some embodiments, a grounding terminal 6 is provided at the end of the metal conductor 5. The grounding terminal 6 is preferably a metal clip structure such as an alligator clip. Alligator clips are easy to operate and provide a firm grip. Operators can quickly clip them onto grounding pins, grounding blocks, or other grounding carriers to achieve a reliable connection between the metal conductor 5 and the earth.

[0031] In some embodiments, the width of the wide clamping arm 4 is greater than the width of the gripping handle 2, and the width of the wide clamping arm 4 is 5-15% of the width of the detection film. Optionally, in some embodiments, the width of the wide clamping arm 4 is 8-12% of the width of the detection film. Exemplarily, the width of the wide clamping arm 4 can be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15% of the width of the detection film, or a range of any two of the above values. Preferably, the width of the wide clamping arm 4 is 10% of the width of the detection film, which ensures clamping stability while maximizing electrostatic conduction efficiency, adapting to most detection scenarios for ultra-wide optical films.

[0032] For example, on an AG anti-glare film appearance inspection line with a width of 2400mm and above, this fixing clip is clamped onto the inspection frame beam to fix the edge of the film and eliminate electrostatic interference.

[0033] like Figure 2As shown, the grip handle 2 of this fixing clamp is 200mm wide, and the anti-slip gripping surface of the wide clamping arm 4 is 240mm wide, that is, the anti-slip gripping surface of the wide clamping arm 4 is 10% of the width of the detection membrane. The metal wire 5 is connected to the non-contact membrane surface of the wide clamping arm 4 and is led out from the internal wiring of the grip handle 2. The length of the metal wire 5 from the handle to the grounding terminal 6 is 1000mm.

[0034] Operating procedures: The operator first securely clamps the grounding terminal 6 (alligator) at the end of the metal wire 5 to the grounding pin, grounding bar, or other reliable grounding carrier at the testing site, ensuring an effective grounding connection and forming a complete electrostatic discharge path. The operator then presses down on the curved part 21 of the handle 2, using the rotation of the connecting pivot 3 to drive the wide clamping arm 4 to open. The edge of the ultra-wide optical film is then precisely placed on the wide anti-slip clamping surface of the lower clamping arm, ensuring full contact between the film edge and the clamping surface without any offset. The operator slowly releases the handle 2, and the wide clamping arm 4 closes under the action of the handle's own elasticity or auxiliary elastic elements, achieving stable clamping of the film edge. At this point, the appearance inspection equipment can be started for defect detection. The entire operation process requires no complicated debugging and can be completed quickly by a single person.

[0035] Dynamic process: The electrostatic charge generated by friction on the membrane surface is transferred to the metal wire 5 through the non-electrostatic end of the wide clamp arm 4 at the end of the grip handle 2. After passing through the metal wire 5, it is released to the ground through the metal clamp. The charge release response time is <0.3 seconds. In actual measurement, the electrostatic voltage at the 2400mm membrane edge drops from 7kV to 0.2kV. Technical effectiveness verification: When using a traditional clamp, the residual electrostatic voltage on the film surface is 5.8kV, while when using an ultra-wide anti-static clamp for ultra-wide optical film appearance inspection, the residual electrostatic voltage on the film surface is 0.15kV. When using a traditional clamp, the dust adsorption defect rate is 18%, while when using an ultra-wide anti-static clamp for ultra-wide optical film appearance inspection, the dust adsorption defect rate is 0.9%.

[0036] Through the above technical solution, this application achieves rapid conduction and complete release of electrostatic charge through the coordinated design of wide conductive clamping arms, metal wire 5, and grounding terminal 6, controlling the residual electrostatic voltage on the membrane surface to an extremely low level. This eliminates the phenomenon of electrostatic adsorption of dust and particulate matter in the air from the source, significantly reducing the dust adsorption defect rate on the membrane surface. Moreover, the reduction in the dust adsorption defect rate allows the original defects of the membrane material itself to be clearly presented, effectively avoiding the problem of misjudgment and missed judgment of defects caused by electrostatic adsorption in traditional fixing clamps, and significantly improving the accuracy and efficiency of defect identification by appearance inspection equipment.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A static-proof fixing clip for ultra-wide optical film appearance inspection, characterized in that, include: Composite clamp (1) is used to hold optical films for appearance inspection; The composite clamp (1) includes a grip handle (2), which is rotatably connected by a connecting pivot (3). At least one set of grip handles (2) is provided with a wide clamp arm (4) at its end. The wide clamp arm (4) is provided with a metal wire (5) extending along the inside of the grip handle (2) at its end, so that the grip handle (2) can control the opening and closing of the wide clamp arm (4) by rotating the connecting pivot (3) and conduct electrostatic charge through the metal wire (5).

2. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 1, characterized in that, The grip handle (2) includes a curved part (21), and a wire groove (22) is provided on the inner side of the curved part (21) along the edge contour.

3. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 2, characterized in that, The grip handle (2) has a rotating hole (23) in the middle, and a connecting pivot (3) is inserted into the rotating hole (23).

4. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 2, characterized in that, The handle (2) is provided with a wiring hole (24) at the tail, and a metal wire (5) is passed through the wiring hole (24).

5. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 1, characterized in that, The wide clamping arm (4) includes a clamping part (41), and a connecting ring (42) is provided on the non-static end of the clamping part (41) extending along the edge contour.

6. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 1, characterized in that, One end of the metal wire (5) is connected to the connecting ring (42) of the wide clamp arm (4).

7. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 6, characterized in that, The other end of the metal wire (5) is led out from the wiring hole (24) at the tail of the grip handle (2) along the wiring groove (22) and grounded.

8. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 6, characterized in that, The metal wire (5) is provided with a grounding terminal (6) at its end, and the grounding terminal (6) is a metal clip.

9. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 1, characterized in that, The grip handle (2) is made of nylon, the wide clamp arm (4) is made of carbon black filled conductive rubber, and the metal wire (5) is made of tin-plated copper wire.

10. The anti-static fixing clip for ultra-wide optical film appearance inspection according to claim 1, characterized in that, The width of the wide clamping arm (4) is greater than the width of the grip handle (2), and the width of the wide clamping arm (4) is 5-15% of the width of the detection membrane.

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