Protective lens and welding helmet using the same

Abstract

The application provides a protective lens and a welding mask using the same. The protective lens comprises, from outside to inside, a filter and a liquid crystal sheet. The filter and the liquid crystal sheet are adhered by a first adhesive. The filter is made of a transparent plastic as a base material. The protective lens is produced by using a plastic filter, which avoids the problem of breakage and scrapping of a traditional glass filter during production and use. The production cost of the protective lens is reduced. The easy processability also enables the protective lens to be upgraded in structure and function to a greater extent according to requirements. Meanwhile, the protective lens improves the structural strength and production efficiency of the protective lens through a special dispensing and curing process.

Description

Technical Field

[0001] This invention relates to the field of welding protection technology, specifically to a protective lens and a welding mask using the protective lens. Background Technology

[0002] Electric welding is a welding operation that uses a welding rod to melt the metal parts that need to be joined by an electric arc at high temperature. During electric welding, if eye protection is not taken, the eyes will be stimulated by the strong ultraviolet rays in the arc light, which can cause a series of eye diseases.

[0003] In modern industry, welders typically use welding protective masks, helmets, or goggles for protection during electric welding operations. The most important protective component is the protective lens, which is usually composed of a glass filter and a liquid crystal panel. Existing protective lenses are limited by materials and processing technology, resulting in high scrap rates due to easy breakage and scrapping during production and use, and low production efficiency due to glue curing.

[0004] Therefore, existing technologies need further development. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a protective lens and a welding mask using the protective lens, so as to solve the technical problems of high scrap rate, easy breakage and low production efficiency of protective lenses in related technologies.

[0006] A protective lens, comprising, from the outside in, a light filter and a liquid crystal panel, wherein the light filter and the liquid crystal panel are bonded together by a first adhesive, and wherein the light filter is made of a transparent plastic substrate.

[0007] The protective lens, wherein the transparent plastic includes polymethyl methacrylate, polystyrene, polycarbonate, acrylonitrile-styrene copolymer, and polyvinyl chloride.

[0008] The protective lens further includes an inner protective sheet, which is located within the liquid crystal panel.

[0009] The protective lens further includes an outer protective film located outside the filter.

[0010] The protective lens, wherein the first colloid forms continuous or discontinuous adhesive lines along the edges of the filter and the liquid crystal sheet.

[0011] The protective lens, wherein the first colloid forms a cross-shaped or star-shaped radial adhesive line between the filter and the liquid crystal sheet, and the radial adhesive line is provided in multiple forms, which are distributed in an array near the central area of ​​the filter and the liquid crystal sheet.

[0012] The protective lens, wherein the liquid crystal panels are configured as a plurality of liquid crystal panels, which are bonded together by dispensing adhesive to form a liquid crystal panel group.

[0013] The protective lens, wherein the thickness of the filter is 1.1 mm, 0.7 mm or 0.8 mm, and the thickness of the liquid crystal panel is 1.8 mm.

[0014] The protective lens, wherein the width of the first adhesive line is 0.2-0.4 mm.

[0015] A welding mask, wherein the welding mask is provided with a protective lens as described above.

[0016] Beneficial effects:

[0017] This invention provides a protective lens and a welded face shield using the same lens. The protective lens is manufactured using a plastic substrate filter, avoiding the problem of easy breakage and scrapping of traditional glass filters during production and use. This also reduces the production cost of the protective lens. The resulting ease of processing allows for greater structural and functional upgrades to meet specific needs. Furthermore, the special dispensing and curing processes enhance the structural strength and production efficiency of the protective lens. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the protective lens according to a specific embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of a partial structure of the protective lens according to a specific embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a protective lens structure with an inner protective sheet according to a specific embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the protective lens structure with the protective sheet fixedly connected in a specific embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of a protective lens structure with an outer protective sheet according to a specific embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the protective lens structure with the outer protective sheet fixedly connected in a specific embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the shape of the continuous adhesive line in a specific embodiment of the present invention;

[0025] Figure 8This is a schematic diagram of the shape of the discontinuous adhesive line in a specific embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the cross-shaped adhesive line shape in a specific embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the shape of the cross-shaped adhesive line in a specific embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of the novel adhesive line distribution in a specific embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the novel adhesive line distribution in another specific embodiment of the present invention;

[0030] Figure 13 This is a schematic diagram of the outer protective sheet structure in a specific embodiment of the present invention;

[0031] Figure 14 This is a schematic diagram of the protective lens structure using a new production process in a specific embodiment of the present invention;

[0032] Figure 15 This is a schematic diagram illustrating the production of protective lenses using a new manufacturing process in a specific embodiment of the present invention;

[0033] Figure 16 This is a schematic diagram of the production of protective lenses using a new manufacturing process in another specific embodiment of the present invention;

[0034] Figure 17 This is a schematic diagram of the protective lens connection in a specific embodiment of the present invention;

[0035] Figure 18 This is a schematic diagram of the protective lens connection in another specific embodiment of the present invention;

[0036] Figure 19 This is a schematic diagram of the protective lens connection in another specific embodiment of the present invention;

[0037] Figure 20 This is a front view of the lens assembly with the protective lens installed in a specific embodiment of the present invention;

[0038] Figure 21 This is a reverse view of the lens assembly with the protective lens installed in a specific embodiment of the present invention;

[0039] Figure 22 This is a reverse view of the lens assembly with the protective lens installed in another embodiment of the present invention;

[0040] Figure 23 This is a schematic diagram of the welding mask in a specific embodiment of the present invention. Detailed Implementation

[0041] 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 only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0042] According to an embodiment of the present invention, a protective lens is provided; please refer to [link / reference]. Figures 1 to 2 The protective lens, from the outside in, includes a filter 100 and a liquid crystal panel 200, which are bonded together by a first adhesive 310. The filter is made of transparent plastic as the substrate. The protective lens is mainly used to eliminate the harm to welders caused by harmful light generated during welding. Harmful light during welding includes ultraviolet, visible, and infrared rays. In this invention, the main function of the filter 100 is to block harmful ultraviolet and infrared rays generated during welding, and the main function of the liquid crystal panel 200 is to block harmful visible light generated during welding. The filter 100 is made of transparent plastic, which gives it flexibility and ease of processing, unlike traditional glass filters. The fragility of glass filters is a major reason for the scrapping of protective lenses during production and use. This invention completely solves this drawback by using a plastic filter, greatly reducing the production scrap rate and providing a basis for the application of new processes in the production of protective lenses.

[0043] In specific embodiments, the transparent plastic substrate for preparing the filter includes polymethyl methacrylate (PMMA), polystyrene, polycarbonate, acrylonitrile-styrene copolymer, and polyvinyl chloride (PVC). These materials are preferred due to their good transparency and compatibility with UV / IR absorbing materials. Plastic filter preparation materials are formed by incorporating UV and IR absorbing materials into the above substrate raw materials. Among these, polycarbonate-based filters exhibit the best performance. Polycarbonate, as a filter substrate, is an almost colorless, glassy amorphous polymer with high light transmittance, high refractive index, high impact resistance, dimensional stability, and ease of processing. Its excellent light focusing and collection properties ensure that the object seen by the welder through the filter is not distorted. Simultaneously, polycarbonate has excellent compatibility with the incorporated UV / IR absorbing materials, which absorb UV and IR rays and address the issue of polycarbonate's weak UV resistance, protecting the substrate from UV / IR damage.

[0044] Based on the present invention, the protective lens is assembled as follows: Figure 20 and Figure 21 The lens assembly shown has a mounting frame on the frame 500. The protective lens is a planar lens, which is snapped into the mounting frame from the inside of the lens assembly by the clips 510. The filter 100 is on the outside and the liquid crystal panel 200 is on the inside. Because the filter is made of plastic substrate, the new protective lens allows the lens assembly to adapt to the installation with slight deformation. The problem of easy breakage and scrapping of the lens assembly in the past is solved. At the same time, the toughness of the new protective lens allows it to adhere better to the lens assembly frame. The gap between the protective lens and the lens assembly frame is smaller, and the possibility of light leakage and transmission through the gap is lower. Therefore, the protective lens has better eye protection performance.

[0045] Furthermore, based on the new filter, the protective lens assembly of the present invention can be designed as a whole, which is limited to planar shape due to the original limitation of glass filter material. The curved protective lens can expand the welder's field of vision, which is more conducive to operation. At the same time, the curved surface effect of the curved protective lens can magnify the target in the welder's field of vision, which is more conducive to seeing the welding point clearly and improving the welding quality.

[0046] Furthermore, such as Figure 3 The protective lens shown also includes an inner protective sheet 410, which is located inside the liquid crystal panel. Because the liquid crystal panel is relatively fragile and easily damaged, the inner protective sheet protects the exposed side of the liquid crystal panel, preventing accidental damage and preventing injury to the welder's eyes or face from accidental breakage. Figure 20 As shown, the inner protective sheet makes the tooth 510, which originally needed to contact the liquid crystal sheet, now have the inner protective sheet 410 abutting against the tooth 510. The liquid crystal sheet is relatively soft and easily damaged during contact with the tooth. The inner protective sheet avoids this problem and improves the reliability of the protective lens.

[0047] The inner protective sheet and the liquid crystal panel are tightly bonded. The tighter the bond, the less the impact of airflow between the two layers on the viewing angle. The inner protective sheet is prone to wear during use. Since it only adheres to the surface of the liquid crystal panel, it can be directly replaced when worn. The inner protective sheet is larger than the liquid crystal panel to completely shield it and prevent dust and other impurities from entering. Preferably, the edge of the inner protective sheet is tightly bonded to the welding mask body, and a ring is formed around the edge of the inner protective sheet to minimize the entry of impurities into the liquid crystal panel.

[0048] like Figure 4In another embodiment shown, the inner protective sheet 410 and the liquid crystal panel 200 are bonded together by a second adhesive 320, thus making the inner protective sheet non-replaceable. The non-replaceable inner protective sheet can avoid damage to the liquid crystal panel during the replacement of the inner protective sheet. In this case, a coating needs to be applied to the outer surface of the inner protective sheet. The coating can improve the wear resistance of the inner protective sheet surface, so there is no need to replace the inner protective sheet.

[0049] Furthermore, such as Figure 5 The protective lens shown also includes an outer protective sheet 420, which is located outside the filter 100. The outer protective sheet primarily protects the filter. Since this invention uses a plastic-based filter, its scratch and wear resistance is inferior to traditional glass filters, making the outer protective sheet particularly necessary. The outer protective sheet can block physical damage to the filter from splashed solder and other contaminants, and also provides thermal insulation, preventing damage to the filter from short-term localized high temperatures. The outer protective sheet is snapped onto the welding mask without contacting the filter, allowing for timely replacement if damaged.

[0050] like Figure 6 In another embodiment shown, the outer protective sheet and the filter are bonded together by a third adhesive 330, thus making the outer protective sheet non-replaceable. The non-replaceable outer protective sheet can avoid damage to the filter during the replacement of the outer protective sheet. In this case, a coating needs to be applied to the outer surface of the outer protective sheet. The coating can improve the wear resistance of the outer protective sheet surface, so there is no need to replace the outer protective sheet.

[0051] Furthermore, the inner and outer protective sheets can be made of the same material, i.e., a material with high transparency, wear resistance, and high structural strength, such as high-functionality polyurethane acrylate. In a preferred embodiment, the inner and outer protective sheets can also be made of different materials. Since the inner and outer protective sheets are located in different positions, their functions are also different. The inner protective sheet is located closer to the face. In addition to protecting the liquid crystal panel, the inner protective sheet is exposed to moisture from the welder's breath. Preferably, the adhesive layer formed between the inner protective sheet and the liquid crystal panel by the second colloid is dense. In the closed enclosure state, the inner protective sheet is a transparent plastic sheet with heating wires distributed inside. The heating wires are powered by a power source externally mounted on the welding mask to generate heat, preventing water vapor from condensing on the outer surface of the inner protective sheet and affecting visibility. Alternatively, a coating can be applied to the outside of the inner protective sheet to reduce the possibility of surface condensation. Heat-conducting wires can also be distributed within the inner protective sheet. Heat exchange blocks are provided on the parts of the welding mask that come into contact with the human body, such as the straps. The heat-conducting wires are connected to the heat exchange blocks, which quickly absorb heat from the human body surface and conduct it to the heat-conducting wires to raise the surface temperature of the inner protective sheet, thereby preventing water vapor condensation.

[0052] The outer protective sheet primarily faces the high ultraviolet and infrared radiation during welding and the environment prone to impact. Therefore, it is typically made of materials with high hardness, wear resistance, and UV aging resistance, such as hot-melt resin materials. The inner protective sheet, in addition to providing physical protection for the filter, should ideally also isolate the instantaneous high temperatures during welding to protect both the filter and the liquid crystal panel. Therefore, the outer protective sheet uses materials such as... Figure 13 The structure shown features a vacuum cavity 421 inside the outer protective sheet. This vacuum cavity provides localized frontal thermal insulation, protecting the subsequent light filter and liquid crystal panel. To enhance the structural strength of the outer protective sheet, several support pillars 422 are installed within the vacuum cavity. These pillars mitigate the reduction in structural strength caused by the vacuum cavity. Alternatively, to reduce manufacturing complexity, two outer protective sheets can be glued together. The glued space forms a sealed air cavity layer, which also provides thermal insulation.

[0053] Since protective lenses consist of multiple functional layers, their bonding process largely determines the quality and lifespan of the lenses. Based on the use of plastic-based filters, the protective lenses of this invention employ a novel bonding process to improve the performance and lifespan of the lenses.

[0054] like Figure 7 and Figure 8 In the specific embodiments shown, the first colloid 310 forms continuous or discontinuous adhesive lines along the edges of the filter and the liquid crystal panel. In another embodiment, the second colloid forms continuous or discontinuous adhesive lines along the edges of the inner protective sheet and the liquid crystal panel, wherein the second colloid is distributed at the same position as the first colloid. In yet another embodiment, the third colloid forms continuous or discontinuous adhesive lines along the edges of the outer protective sheet and the filter, wherein the third colloid is distributed at the same position as the first colloid.

[0055] like Figure 7 The continuously distributed adhesive lines shown maximize the bonding strength between the two functional layers, while using... Figure 8 The discontinuous adhesive lines shown, such as the discontinuous dispensing method, can effectively reduce the stress formed after the functional layer is bonded, and reduce the warpage.

[0056] To further enhance the bonding strength between the functional layers of the lens and ensure uniform spacing between adjacent functional layers, an adhesive layer is also placed in the middle of adjacent functional layers. This central adhesive layer has the same thickness as the outer adhesive layer, jointly supporting and bonding the functional layers. Figure 9 and Figure 10In the preferred embodiment shown, the first adhesive forms a cross-shaped or star-shaped radial adhesive line between the filter and the liquid crystal panel. Multiple radial adhesive lines are arranged in an array near the central region of the filter and the liquid crystal panel. Compared to dot-shaped adhesive, the cross-shaped or star-shaped radial adhesive lines provide stronger bonding strength at the connection points, thereby reducing the number of adhesive dots and preventing excessive central adhesive layer from obstructing the welder's view.

[0057] In another embodiment, the second colloid forms a cross-shaped or star-shaped radial adhesive line between the inner protective sheet and the liquid crystal sheet. The radial adhesive line is provided in multiple forms and is distributed in an array near the central area of ​​the inner protective sheet and the liquid crystal sheet.

[0058] In another embodiment, the third colloid forms a cross-shaped or star-shaped radial adhesive line between the outer protective sheet and the filter. The radial adhesive line is configured as a plurality of such radial adhesive lines, which are distributed in an array near the central region of the outer protective sheet and the filter.

[0059] The presence of the adhesive layer creates gaps between the functional layers of the lens. While these gaps, if small enough, do not obstruct the welder's field of vision, the entry of impurities and droplets into these gaps is a significant cause of lens quality degradation. This invention addresses this problem through a novel adhesive line design: [e.g., ...] Figure 11 As shown, taking the arrangement of the first adhesive as an example, the first adhesive is coated on the liquid crystal panel 200, forming an outer annular adhesive line 311 and a central dotted adhesive line 312. The outer annular adhesive line makes the gap between the liquid crystal panel and the filter a closed space, preventing impurities and moisture from entering the gap. In addition, a vacuum can be drawn into the closed space within the annular adhesive line, creating a micro-vacuum state. The micro-vacuum state is more conducive to light transmission and can prevent moisture in the air from corroding the adhesive, thus extending the service life of the lens. The dotted adhesive lines 312 are arranged in multiple arrays. The dotted adhesive lines 312 are used to bond the middle part of the liquid crystal panel and the filter, playing a bonding and supporting role, ensuring that the bonding force on each part of the liquid crystal panel and the filter is not significantly different, avoiding stress and ensuring sufficient bonding strength.

[0060] like Figure 12In another preferred embodiment shown, taking the arrangement of the first colloid as an example, the first colloid is coated on the liquid crystal sheet 200, having an outer annular adhesive line 313. Within the outer annular adhesive line 313, linear adhesive lines 314 divide the space enclosed by the annular adhesive line 313 into multiple rectangular regions. The linear adhesive lines are in contact with the annular adhesive line at one end. A dotted adhesive line 315 is provided at the center of the multiple linear adhesive lines. The distance between the dotted adhesive line 315 and the ends of the multiple gathered linear adhesive lines is less than 0.2 mm. A notch is formed on the annular adhesive line 315, through which vacuum is drawn. Vacuuming is performed simultaneously during the compaction of the filter and the liquid crystal sheet. Through the compaction process, the dotted adhesive line is compacted and contacts the ends of the linear adhesive lines, making the rectangular regions sealed, thereby forming a micro-vacuum. This adhesive line design allows for several micro-vacuum regions between the functional layers of the lens. Even if air enters a certain region due to the movement of the colloid, it will not affect the other micro-vacuum regions.

[0061] Furthermore, the width of the adhesive lines formed by the first colloid is 0.2-0.4 mm, and the thickness of the adhesive lines after compaction is less than 0.1 mm. In another embodiment, the width of the adhesive lines formed by the second and third colloids is also 0.2-0.4 mm. The preferred range of adhesive line width and thickness was obtained through repeated experiments while taking into account the adhesive bonding strength and ensuring that the adhesive lines do not affect the field of vision. In addition, the inventors also found that excessively wide adhesive lines can cause significant deformation of the functional layers around them, resulting in greater connection stress and potential warping later on. In a preferred embodiment, the width of the adhesive lines of the first colloid is 0.3 mm. Under the preferred parameters, the bonding strength between the functional layers of the lens meets the design requirements, while the deformation of the functional layers at the adhesive line positions is extremely small, the resulting stress is negligible, and the formed adhesive lines do not substantially affect the welder's field of vision.

[0062] In the traditional production process of protective lenses, adhesive curing is the most time-consuming step, becoming a speed-limiting step in the production of protective lenses. Shortening the curing time easily leads to incomplete curing of the adhesive, resulting in weak adhesion, peeling and warping of the functional layers of the protective lens, and ultimately, rendering it unusable. To improve the production efficiency of protective lenses, a novel curing adhesive process is designed for filters based on plastic substrates. In a preferred embodiment, the first adhesive used in the protective lens is a UV-curable adhesive. UV-curable adhesives can cure rapidly under specific ultraviolet irradiation. Therefore, the first adhesive used to bond the liquid crystal sheet and the filter is a UV-curable adhesive, which can be produced using the following process: After applying the first adhesive to a predetermined position on the filter, the liquid crystal sheet is aligned onto the filter side coated with the first adhesive, pressed firmly, and then a UV lamp is used to irradiate the area coated with the first adhesive on one side of the liquid crystal sheet for 3-5 seconds to cure the first adhesive, completing the bonding of the filter and the liquid crystal sheet. Furthermore, the second colloid is a UV-curable adhesive. When bonding the liquid crystal sheet and the inner protective sheet, the second colloid is applied to a predetermined position on the exposed surface of the liquid crystal sheet. The inner protective sheet is then aligned with the side of the liquid crystal sheet coated with the second colloid. After compaction, a UV lamp is used to irradiate the coated position on one side of the inner protective sheet for 3-5 seconds to cure the second colloid, thus completing the bonding of the inner protective sheet and the liquid crystal sheet. Furthermore, the third colloid is a UV-curable adhesive. When bonding the filter and the outer protective sheet, the third colloid is applied to a predetermined position on the exposed surface of the filter. The outer protective sheet is then aligned with the side of the filter coated with the third colloid. After compaction, a UV lamp is used to irradiate the coated position on one side of the outer protective sheet for 3-5 seconds to cure the third colloid, thus completing the bonding of the outer protective sheet and the filter.

[0063] In a preferred embodiment, to further improve production efficiency, the first, second, and third colloids are coated layer by layer and then assembled. Afterward, both sides of the assembled body are irradiated with UV lamps at the coated areas for at least 8-10 seconds to achieve simultaneous curing of the first, second, and third colloids. To ensure the smooth implementation of this process, the following method is employed: Figure 14 The protective lens structure shown allows the second and third colloids to be positioned either overlapping or non-overlapping, while the first and second colloids, and the third colloid, are not overlapping. This ensures that the UV lamp can effectively irradiate each colloid, allowing for successful curing. Preferably, the first and second colloids are staggered, with an overlap of at least 1 mm. This ensures that the second colloid completely does not obstruct the first colloid when irradiated by the UV lamp. This process simplifies the manufacturing process and further improves production efficiency.

[0064] In a preferred embodiment, during the UV lamp irradiation of the assembled body after assembly, the presence of the outer functional layer will always block or weaken the UV lamp irradiation, resulting in delamination in areas not irradiated by the UV light. This is especially true if the edges of the adhesive layer are not completely cured; subsequent exposure to moisture and other environmental factors can easily lead to delamination, causing the functional layer of the lens to peel and warp. This problem is even more pronounced when using plastic substrate filters, as the warping after delamination will be more severe. To address this issue, the following improved production process is preferred: Figure 15 As shown, an optical fiber cluster 610 composed of several optical fibers is used to directionally guide ultraviolet light. The head end of the optical fiber cluster is set to converge from the side of the lens towards the colloid, so that the ultraviolet light guided by the optical fiber hits the colloid. The ultraviolet light guided by the optical fiber can be directionally directed onto the colloid, ensuring that the colloid is cured in place. This process can be implemented alone to cure the colloid or it can be carried out simultaneously with the aforementioned UV lamp irradiation process to make up for the problem of incomplete irradiation that may occur during UV lamp irradiation. Because it can directionally guide ultraviolet light, according to the previous process summary, the location where incomplete irradiation often occurs can be treated with this method, which can achieve a particularly good enhancement effect.

[0065] Furthermore, inspired by fiber clusters, the manufacturing process was further optimized, such as... Figure 16 As shown, since the thickness of the fiber cluster is much smaller than the gap between the functional layers of the compacted lens, it can further improve the colloid curing effect. After the colloid is coated, the fiber cluster 620 is placed in the area between the outer colloid and the colloid near the center. The two functional layers, such as liquid crystal and filter, are then aligned and the colloid layer is compacted. Then, the fiber clusters 610 and 620 are respectively guided with ultraviolet light to achieve colloid curing. The fiber cluster 610 directionally outputs ultraviolet light at the colloid position on the side of the lens assembly. The fiber cluster 620 is dragged so that its head end moves in the gap between the two functional layers. The ultraviolet light output from the head end of the fiber cluster 620 can gradually irradiate the entire colloid. The inner side of the outer colloid and all parts of the central colloid can be irradiated to ensure that the colloid is cured in place. This process can be implemented alone to achieve colloid curing, or it can be used in conjunction with UV lamp irradiation.

[0066] Unlike glass filters, this invention uses a plastic substrate filter that can be processed with grooves and other techniques. For the colloid placement location, by creating a groove on the filter to support the colloid, the contact area between the colloid and the filter can be increased, thereby improving the bonding strength between the colloid and the filter. Figure 15In the example shown, a glue groove 110 is machined near the outer edge of the filter at a location where the adhesive is applied. The glue groove 110 can be a shallow V-shaped groove or a shallow U-shaped groove. A first adhesive 310 is injected into the glue groove 110, with one end of the first adhesive making full contact and bonding with the glue groove, and the other end bonding with the liquid crystal sheet. The glue groove 110 can be engraved on the surface of the filter using a scriber with a specific cutting edge. It is precisely because of the plastic substrate that the filter possesses this machinability.

[0067] In a preferred embodiment, such as Figure 18 As shown, a trapezoidal groove 120 with a groove opening smaller than the bottom is formed on the surface of the filter. The first colloid is injected into the trapezoidal groove and fully contacts and bonds with the inside of the groove. The other end contacts and bonds with the liquid crystal sheet. The trapezoidal groove can form a steric hindrance after the first colloid is cured, which greatly improves the connection strength between the first colloid and the filter, thereby improving the connection strength between the filter and the liquid crystal sheet.

[0068] Furthermore, such as Figure 19 As shown, a fourth colloid 340 is disposed at the position of the first colloid corresponding to the liquid crystal sheet. The fourth colloid is an adhesive material with stronger bonding strength to the liquid crystal sheet material. A "base" is formed at the corresponding position of the liquid crystal sheet by the fourth colloid. One end of the first colloid corresponding to the liquid crystal sheet is connected to the base formed by the fourth colloid and fully contacts and fuses with the base to solidify. The bonding strength between the first colloid and the fourth colloid is much stronger than the bonding strength between the first colloid and the liquid crystal sheet. The base formed by the fourth colloid can improve the connection strength between the first colloid and the liquid crystal sheet, thereby improving the connection strength between the filter and the liquid crystal sheet.

[0069] In another embodiment, the inner and outer protective sheets can be provided with connecting grooves on a similar principle to connect the second and third colloids respectively, and the form of the connecting grooves can refer to the above embodiment.

[0070] In a preferred embodiment, the protective lens of the present invention comprises multiple liquid crystal panels, which are bonded together by adhesive to form a liquid crystal panel group. The liquid crystal panel group enhances the blocking of harmful visible light. Preferably, the liquid crystal panel group comprises three liquid crystal panels of the same specifications. The use of three identical liquid crystal panels in the liquid crystal panel group improves the blocking effect without affecting the visibility of the field of view.

[0071] In specific embodiments, considering cost and functionality, the thickness of the filter used in this invention is 1.1 mm, 0.7 mm, or 0.8 mm, and the thickness of the liquid crystal sheet used is 1.8 mm.

[0072] The present invention also provides a welding mask, such as Figure 23 As shown, the welding mask is equipped with protective lenses as described above.

[0073] This invention provides a protective lens and a welded face shield using the same lens. The protective lens is manufactured using a plastic substrate filter, avoiding the problem of easy breakage and scrapping of traditional glass filters during production and use. This also reduces the production cost of the protective lens. The resulting ease of processing allows for greater structural and functional upgrades to meet specific needs. Furthermore, the special dispensing and curing processes enhance the structural strength and production efficiency of the protective lens.

[0074] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0075] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0076] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0077] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0078] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0079] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0080] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0082] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A protective lens, characterized in that, From the outside in, it includes a light filter and a liquid crystal panel, which are bonded together by a first adhesive. The light filter is made of transparent plastic as the substrate. It also includes: an inner protective sheet, which is located within the liquid crystal panel; An outer protective sheet, which is located outside the filter; The first colloid forms continuous or discontinuous adhesive lines along the edges of the filter and the liquid crystal sheet; The first colloid forms a cross-shaped or star-shaped radial adhesive line between the filter and the liquid crystal sheet. There are multiple radial adhesive lines, and the multiple radial adhesive lines are distributed in an array near the central area of ​​the filter and the liquid crystal sheet. A gap is formed on the adhesive line, and vacuuming is performed through this gap. Vacuuming is also performed during the compaction of the filter and the liquid crystal sheet. A glue groove is provided near the outer edge of the filter. The glue groove is a V-shaped shallow groove, a U-shaped shallow groove, or a trapezoidal groove with the opening smaller than the bottom.

2. The protective lens according to claim 1, characterized in that, The transparent plastic includes polymethyl methacrylate, polystyrene, polycarbonate, acrylonitrile-styrene copolymer, and polyvinyl chloride.

3. The protective lens according to claim 1, characterized in that, The liquid crystal panels are configured as multiple units, and the multiple liquid crystal panels are bonded together by dispensing adhesive to form a liquid crystal panel group.

4. The protective lens according to claim 1, characterized in that, The thickness of the filter is 1.1 mm, 0.7 mm, or 0.8 mm, and the thickness of the liquid crystal is 1.8 mm.

5. The protective lens according to claim 1, characterized in that, The width of the first colloidal adhesive line is 0.2-0.4 mm.

6. A welding mask, characterized in that, The welding mask is provided with a protective lens including any one of claims 1-5.

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