Lens protection film for realizing rotation adjustment of light transmittance

Abstract

The utility model relates to lens protection film technical field, especially realize a kind of lens protection film of rotation adjustment transmittance, including outer frame ring and inner frame ring, annular groove is set up in the inboard of outer frame ring, inner frame ring has the damping ground activity connection in annular groove;The inboard of outer frame ring is provided with first polarizer, the inboard of inner frame ring is provided with the second polarizer below first polarizer, the lower end of inner frame ring is pasted with the adhesive layer for pasting fixed;Inner frame ring is fixed in lens end portion by adhesive layer, and the design that outer frame ring can rotate and with damping, both avoid driving inner frame ring or lens deviation when adjusting, also ensure that outer frame ring will not move after adjusting, make transmittance adjustment more accurate, stable;Double-layer polarizer cooperation outer frame ring's rotation adjustment, still can flexible adaptation complex light environment, weaken strong light, inhibit reflection, avoid picture overexposure, improve imaging quality.

Description

Technical Field

[0001] This utility model relates to the field of lens protective film technology, and in particular to a lens protective film that enables rotational adjustment of light transmittance. Background Technology

[0002] With the continuous upgrading of smartphone photography functions, the rearview mirror lens, as a core imaging component, has become a key focus for users in terms of protection and shooting effect optimization. This has led to a surge in market demand for lens protectors and related auxiliary optical accessories. Currently, most mainstream rearview mirror lens protectors on the market are made of transparent resin and glass to provide basic scratch, dust, and fingerprint resistance. These protectors have fixed light transmittance and cannot be adjusted according to actual lighting conditions. In strong direct sunlight scenarios (such as midday outdoors, snow, or water reflections), they can easily cause overexposure, loss of highlight details, and may also result in glare and ghosting, severely impacting image quality. To address this pain point, auxiliary accessories such as clip-on polarizing filters for mobile phones have emerged in the industry. These filters effectively reduce strong light and suppress reflections through polarization filtering, improving shooting results in complex lighting conditions. However, these products have significant drawbacks: they are relatively large, requiring separate storage and taking up space; they need to be installed on the phone, increasing its thickness and size, significantly reducing portability, resulting in a poor grip during daily use, and potentially interfering with the proper assembly of phone cases; furthermore, repeated installation and removal can cause scratches or damage to the phone's lens or body due to improper handling, failing to meet users' dual needs for convenience and protection. Therefore, existing lens protectors with fixed light transmittance and clip-on polarizing filters cannot simultaneously achieve shooting results, portability, and protection. Developing a mobile phone rearview mirror lens protection product that can adaptively adjust light transmittance to optimize image quality while being compact, portable, and requiring no additional installation or removal has become a pressing technical challenge for the industry. Utility Model Content

[0003] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0004] A lens protective film for adjusting light transmittance by rotation includes an outer frame and an inner frame. An annular groove is formed on the inner side of the outer frame, and the inner frame is damped and movably connected to the annular groove. A first polarizer is disposed on the inner side of the outer frame, and a second polarizer is disposed on the inner side of the inner frame below the first polarizer. An adhesive layer for adhesion and fixation is attached to the lower end of the inner frame.

[0005] Preferably, a thickened portion is formed at the upper part of the inner side of the outer frame, and a first annular recess is formed on the inner side of the thickened portion, and the first polarizing sheet is attached and fixed in the first annular recess.

[0006] Preferably, the first annular recess is located at the upper part of the inner side of the thickened part, and after the first polarizer is attached, the upper end surface of the first polarizer is flush with the upper end surface of the outer frame, or the upper end surface of the first polarizer is lower than the upper end surface of the outer frame.

[0007] Preferably, the annular groove is located at the lower part of the thickened portion, the inner frame is movably connected to the annular groove, and the upper end of the inner frame abuts against the thickened portion.

[0008] Preferably, the inner frame is made of plastic material, and the outer frame is made of metal or plastic material. The inner frame is inserted into the annular groove by riveting along the lower end of the outer frame.

[0009] Preferably, a second annular recess is provided at the upper part of the inner side of the inner frame, and the second polarizer is attached and fixed in the second annular recess.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The inner frame is fixed to the lens end with an adhesive layer, while the outer frame is rotatable and damped. This design prevents the inner frame or lens from shifting during adjustment and ensures that the outer frame does not move on its own after adjustment, making light transmission adjustment more precise and stable. The double-layer polarizing filter, combined with the rotation adjustment of the outer frame, can still flexibly adapt to complex lighting environments, weakening strong light, suppressing reflections, avoiding overexposure, and improving image quality. At the same time, the structure of the outer frame covering the lens further enhances the protection of the lens. Compared with traditional mobile phone clip-on polarizing filters, the product's integrated structure is compact and lightweight. After being glued on, it does not add extra size or thickness to the phone, ensuring portability and hand feel, and does not affect the installation of the phone case. The adjustment method of fixing the inner frame and rotating the outer frame eliminates the need for repeated installation and removal, avoiding scratches and damage to the lens or body, and also provides basic protection functions such as scratch resistance, dust resistance, and fingerprint resistance. The overall structural design is more reasonable and practical, fully meeting users' multiple core needs for shooting effect, ease of use, adjustment stability, and lens protection.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention in its disassembled state; Figure 3 This is a schematic diagram of the cross-sectional structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention in its disassembled state.

[0014] The reference numerals and names in the figure are as follows: Outer frame 10, annular groove 11, first polarizer 12, thickened part 13, first annular recess 14, inner frame 20, second polarizer 21, second annular recess 22, adhesive layer 30. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Please see Figure 1-4 In this embodiment of the present invention, a lens protective film for rotating and adjusting light transmittance includes an outer frame 10 and an inner frame 20. An annular groove 11 is formed on the inner side of the outer frame 10, and the inner frame 20 is dampedly movably connected within the annular groove 11. A first polarizer 12 is provided on the inner side of the outer frame 10, and a second polarizer 21 located below the first polarizer 12 is provided on the inner side of the inner frame 20. An adhesive layer 30 for adhesion and fixation is attached to the lower end of the inner frame 20. When using this lens protective film for rotating and adjusting light transmittance, first peel off the release film on the surface of the adhesive layer 30 at the lower end of the inner frame 20, accurately align the inner frame 20 with the end of the mobile phone rearview mirror lens, and firmly attach and fix the inner frame 20 to the end of the lens through the adhesive layer 30, ensuring that the inner frame 20 fits tightly with the lens without deviation. At this time, the outer frame 10 naturally covers the outside of the mobile phone rearview mirror lens and forms a damped movable fit with the inner frame 20. When the light transmittance needs to be adjusted, the user only needs to pinch the edge of the outer frame 10 with their fingers and apply a rotational force. The outer frame 10 will then rotate smoothly along the circumference of the inner frame 20. The light transmittance can be continuously adjusted by changing the polarization angle between the first polarizer 12 on the outer frame 10 and the second polarizer 21 on the inner frame 20. The light transmittance is maximum when the angle is 0 degrees, and gradually decreases as the angle increases to 90 degrees. The user can rotate the outer frame 10 to the angle with the best imaging effect according to the actual lighting environment such as strong light and reflection. After the adjustment is completed, the outer frame 10 can be stably maintained in its current position by means of the limiting effect of the damping structure and will not rotate on its own.

[0017] The inner frame 20 is fixed to the lens end by the adhesive layer 30, while the outer frame 10 is rotatable and damped. This design prevents the inner frame 20 or the lens from shifting during adjustment, and ensures that the outer frame 10 will not move on its own after adjustment, making the light transmittance adjustment more precise and stable. The first polarizer 12 and the second polarizer 21, together with the rotation adjustment of the outer frame 10, can still flexibly adapt to complex lighting environments, weaken strong light, suppress reflections, avoid overexposure, and improve image quality. At the same time, the design of the outer frame 10 covering the lens further enhances the protection of the lens. Compared to traditional clip-on polarizing filters for mobile phones, this product features a compact and lightweight integrated structure. Once attached, it doesn't add extra volume or thickness to the phone, ensuring portability and a comfortable grip, and doesn't interfere with phone case assembly. The 20mm inner frame for fixing and the 10mm outer frame for rotating adjustment eliminates the need for repeated installation and removal, preventing scratches and damage to the lens or phone body. It also provides basic protection against scratches, dust, and fingerprints. The overall structural design is more rational and practical, fully meeting users' multiple core needs for shooting effects, ease of use, adjustment stability, and lens protection.

[0018] Please see Figure 3-4 Based on the above technical solution, a thickened portion 13 is further proposed to be formed at the upper part of the inner side of the outer frame 10. A first annular recess 14 is formed on the inner side of the thickened portion 13, and the first polarizer 12 is attached and fixed in the first annular recess 14. The design of the thickened portion 13 enhances the structural strength of the outer frame 10, preventing it from deforming during long-term rotation or daily impacts, and provides a stable mounting carrier for the first polarizer 12. The limiting function of the first annular recess 14 can ensure that the first polarizer 12 is installed in a precise position and fits firmly, effectively preventing the first polarizer 12 from shifting, falling off or warping during use, and ensuring the stability of polarization adjustment and the consistency of imaging effect. In terms of design, by adopting the structure of the first annular recess 14, the structure of the first annular recess 14 can make the first polarizer 12 and the inner side of the outer frame 10 form a flat and fitted assembly state, avoiding light refraction interference caused by the first polarizer 12 protruding or being recessed.

[0019] Please see Figure 1 and Figure 3Based on the above technical solution, it is further proposed that the first annular recess 14 is located at the upper part of the inner side of the thickened part 13, and after the first polarizer 12 is attached, the upper end surface of the first polarizer 12 is flush with the upper end surface of the outer frame 10, or the upper end surface of the first polarizer 12 is lower than the upper end surface of the outer frame 10; this can effectively prevent the first polarizer 12 from protruding from the upper end surface of the outer frame 10, prevent the first polarizer 12 from being scratched or worn due to direct contact with external objects during daily use, extend the service life of the first polarizer 12 to a certain extent, and reduce the direct adhesion of fingerprints and stains to the first polarizer 12. The surface of the polarizer 12 reduces cleaning difficulty and ensures clear light transmission. When the upper surface of the first polarizer 12 is flush with the upper surface of the outer frame 10, a flat surface is formed on the top of the outer frame 10, improving the overall aesthetics of the product without affecting the rotation feel of the outer frame 10. When the upper surface of the first polarizer 12 is lower than the upper surface of the outer frame 10, the barrier structure formed on the top of the outer frame 10 further prevents dust, water droplets, and other impurities from entering the surface of the first polarizer 12 or the assembly gap, enhancing the protective effect and preventing the edges of the first polarizer 12 from chipping or falling off due to external impact.

[0020] Please see Figure 3-4 Based on the above technical solution, it is further proposed that the annular groove 11 is set at the lower part of the thickened part 13, and the inner frame ring 20 is movably connected to the annular groove 11, with the upper end of the inner frame ring 20 abutting against the thickened part 13. The abutting relationship between the upper end of the inner frame ring 20 and the thickened part 13 forms an axial limit, which plays a role in increasing the contact area and can effectively prevent the outer frame ring 10 from moving up and down during rotation, ensuring that the first polarizer 12 and the second polarizer 21 always remain parallel and the spacing is stable, avoiding the decrease in polarization adjustment accuracy due to displacement, and ensuring the accuracy of light transmittance adjustment and the consistency of imaging effect; and the thickened part 13 not only provides sufficient forming space for the annular groove 11, but also further strengthens the structural support of the outer frame ring 10 through abutting against the inner frame ring 20, reducing the shaking of the outer frame ring 10 during rotation. Combined with the original damping design, the rotation operation is smoother and more stable, while improving the sealing performance of the overall structure, which can better prevent dust and moisture from entering the lens area from the assembly gap, and enhance the protection effect.

[0021] Based on the above technical solution, it is further proposed that the inner frame ring 20 be made of plastic material, and the outer frame ring 10 be made of metal or plastic material. The inner frame ring 20 is inserted into the annular groove 11 by riveting along the lower end of the outer frame ring 10. By limiting the inner frame ring 20 to plastic material and the outer frame ring 10 to metal or plastic material, and by riveting the inner frame ring 20 into the annular groove 11 along the lower end of the outer frame ring 10, combined with the abutment relationship between the thickened part 13 and the inner frame ring 20, the reliability of the overall structure can be improved. Specifically, since the inner frame ring 20 made of plastic material has good deformation adaptability, combined with the riveting insertion process, the inner frame ring 20 and the annular groove 11 can form a tight fit assembly relationship. Stable damping movement can be naturally achieved without the need for additional damping structures, ensuring smooth rotation and adjustment of the outer frame ring 10. After adjustment, it will not loosen on its own, simplifying the structural design while improving the reliability of the damping fit; and the contact relationship between the thickened part 13 and the inner frame ring 20 provides precise axial limit for the riveting process, effectively avoiding excessive displacement of the inner frame ring 20 or assembly misalignment during riveting, improving the accuracy and stability of the riveting assembly, and preventing problems such as loosening of the inner frame ring 20 and shaking of the outer frame ring 10 during long-term use; in addition, the metal outer frame ring 10 can further enhance the overall structural strength and durability, while the plastic material can take into account the advantages of lightweight and cost, and the choice of the two materials can flexibly adapt to different product needs.

[0022] Please see Figure 3-4 Based on the above technical solution, a second annular recess 22 is further proposed to be provided at the upper part of the inner side of the inner frame 20, and the second polarizer 21 is fixed in the second annular recess 22. The second annular recess 22 provides a precise installation and positioning space for the second polarizer 21, which can ensure that its assembly position is accurate and its fit is firm, effectively preventing the second polarizer 21 from shifting, falling off or warping during use, forming a stable relative positional relationship with the first polarizer 12, ensuring the accuracy of polarization direction angle control when adjusting transmittance, and thus maintaining the consistency of imaging effect; it also utilizes the structure design of the recess, the second annular recess 22 can make the second polarizer 21 form a flat fit with the inner side of the inner frame 20, avoiding light refraction interference caused by the second polarizer 21 protruding or being recessed, and reducing the accumulation of dust and impurities on the edge of the second polarizer 21. Combined with the protective structure of the outer frame 10, it further improves the dustproof and scratch-proof protection effect of the lens.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A lens protective film for adjusting light transmittance by rotation, characterized in that, It includes an outer frame (10) and an inner frame (20). An annular groove (11) is provided on the inner side of the outer frame (10), and the inner frame (20) is damped and movably connected in the annular groove (11). A first polarizer (12) is provided on the inner side of the outer frame (10), and a second polarizer (21) located below the first polarizer (12) is provided on the inner side of the inner frame (20). An adhesive layer (30) for bonding and fixing is attached to the lower end of the inner frame (20).

2. The lens protective film for adjusting light transmittance by rotation according to claim 1, characterized in that, A thickened portion (13) is formed at the upper part of the inner side of the outer frame (10), and a first annular recess (14) is provided on the inner side of the thickened portion (13), and the first polarizer (12) is attached and fixed in the first annular recess (14).

3. The lens protective film for adjusting light transmittance by rotation according to claim 2, characterized in that, The first annular recess (14) is located at the upper part of the inner side of the thickened part (13), and after the first polarizer (12) is attached, the upper end surface of the first polarizer (12) is flush with the upper end surface of the outer frame (10), or the upper end surface of the first polarizer (12) is lower than the upper end surface of the outer frame (10).

4. The lens protective film for adjusting light transmittance by rotation according to claim 2, characterized in that, An annular groove (11) is provided at the lower part of the thickened part (13). After the inner frame (20) is movably connected to the annular groove (11), the upper end of the inner frame (20) abuts against the thickened part (13).

5. A lens protective film for adjusting light transmittance by rotation according to claim 4, characterized in that, The inner frame (20) is made of plastic material, and the outer frame (10) is made of metal or plastic material. The inner frame (20) is inserted into the annular groove (11) by riveting along the lower end of the outer frame (10).

6. A lens protective film for adjusting light transmittance by rotation according to claim 2, characterized in that, A second annular recess (22) is provided at the upper part of the inner side of the inner frame (20), and the second polarizer (21) is attached and fixed in the second annular recess (22).

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