Ultrathin magnetic composite material protective shell

By using an ultra-thin magnetic composite material protective case made of carbon fiber or aramid fiber, the problem of existing magnetic phone cases being no less than 1.0mm thick has been solved. This achieves an ultra-thin design, reduces weight, and maintains strength and toughness. The magnetic ring is flush with the surface of the case, improving aesthetics and durability, enhancing lens protection, and meeting users' needs for both practicality and aesthetics in phone cases.

CN223987116UActive Publication Date: 2026-03-10DONGGUAN FOUR DIMENSIONAL COMPOSITE PROD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing magnetic phone cases are no less than 1.0mm thick, which is inconvenient to process and affects the aesthetics, making it difficult to achieve a thin and ultra-thin design. At the same time, they cannot effectively protect the strength and toughness of the phone case.

Method used

The phone case is made of carbon fiber material and features an optimized structural design, resulting in a thickness of less than 0.8mm. Other cases utilize carbon fiber, bamboo, or aramid fiber materials. The inner wall incorporates a magnetic ring with a thickness of less than 0.5mm. The lens protection ring employs unique technology, ensuring its surface is flush with the case surface. This design avoids surface protrusions and enhances both the aesthetics and user comfort of the phone case.

Benefits of technology

The ultra-thin design reduces the weight of the phone while maintaining the strength and toughness of the case. The magnetic ring is flush with the surface of the case, avoiding any protrusions or defects. This improves the aesthetics and comfort of the phone case, enhances lens protection, and increases the durability and appearance of the phone case.

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Abstract

The utility model relates to the technical field of mobile phone shells, in particular to an ultrathin magnetic composite material protective shell which comprises a shell body made of carbon fiber materials, bamboo or aramid fiber materials, and covered edges used for wrapping the edges of a mobile phone are formed on the edges of at least two sides of the shell body. The shell is provided with a lens protection ring at a position corresponding to the rearview lens of the mobile phone, and the lens protection ring is provided with a buckling structure; a magnet ring with the top exposed is arranged on the inner wall of the shell, and the thickness of a magnet is smaller than 0.5 mm. According to the mobile phone shell, the shell is made of glass fiber materials or aramid fiber materials in a composite mode, the optimized structural design is combined, the thickness of the mobile phone shell can be controlled to be 0.8 mm or below, the overall weight of a mobile phone is greatly reduced, meanwhile, the strength and toughness of the mobile phone shell are kept, and light and thin hand feeling experience is provided for a user.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mobile phone shell, especially to a kind of ultra-thin magnetic composite protective shell. BACKGROUND

[0002] Mobile phone shell is a decorative item for protecting or decorating the appearance of mobile phone. With the rapid development of science and technology, the science and beauty industry emerges as a new type of industry, and with the increase of mobile phone brands and functions, mobile phone protective shell is diversified. Mobile phone protective shell is not only a decorative item, but also protects the mobile phone from falling, scratching, water and shock. Some mobile phone shells are designed to be magnetically attracted and fixed to the car holder, so a magnetic structure needs to be installed inside the mobile phone shell to ensure that it can be magnetically attracted and fixed to the car holder.

[0003] For example, a composite material ultra-light magnetic mobile phone shell disclosed in Chinese patent No. 2021219074869 includes a main body and a magnetic structure. The main body is composed of a frame shell, a first back panel, a foam board and a second back panel. Multiple operating openings are provided on the sides of the frame shell. The first back panel, the foam board and the second back panel are integrally formed at the bottom of the frame shell. A camera opening is provided through the first back panel, the foam board and the second back panel. The foam board is located between the first back panel and the second back panel, and multiple first mounting grooves and one second mounting groove are provided on the upper end surface of the foam board. The utility model effectively avoids the surface protrusion of the magnetic mobile phone shell after forming, and is not prone to bulging and delamination, greatly improving the product quality and effectively reducing the cost and weight of the product. The above-mentioned patent sets the magnetic structure between the first back panel and the second back panel, resulting in a mobile phone shell with a thickness of not less than 1.0 mm and inconvenient processing. Therefore, an ultra-thin mobile phone shell needs to be designed. SUMMARY

[0004] The utility model aims at solving the above-mentioned problems, and provides a mobile phone shell with enhanced interest.

[0005] To achieve the above objectives, this utility model provides an ultra-thin magnetic composite material protective case, comprising: a shell made of carbon fiber, bamboo, or aramid fiber, wherein at least two sides of the shell are formed with edging for wrapping the edges of the mobile phone; a lens protection ring is provided on the shell at the corresponding position of the rear camera of the mobile phone, the lens protection ring having a fastening structure; and a magnet ring with an exposed top is provided on the inner wall of the shell, the exposed surface of the magnet ring being flush with the surface of the shell, and the thickness of the magnet being less than 0.5mm.

[0006] Preferably, the housing corresponding to the lens protective ring has an opening, and the upper surface of the opening has a stepped groove, and the fastening structure is engaged with the stepped groove.

[0007] Preferably, the lens protective ring includes a lens ring, and a fastening structure is provided on the lens ring. The fastening structure includes a slot provided on the lens ring and a retaining edge formed on the upper end of the slot and extending horizontally outward. The side wall of the opening is inserted into the slot, and the stepped groove contacts the retaining edge. The lens ring is made of metal, plastic, or carbon fiber lens.

[0008] Preferably, the housing corresponding to the lens protection ring has a protective layer, the protective layer is integral with the housing, and the protective layer has a clearance hole corresponding to the rear view lens of the mobile phone, and the lens protection ring is formed on the protective layer.

[0009] Preferably, the lens protective ring has a convex edge as its fastening structure, which extends along the thickness direction of the lens protective ring. The top of the convex edge is provided with an inlay groove. When the protective layer is formed, part of it is formed in the inlay groove and part of it wraps around the convex edge. The lens ring is made of metal, plastic or carbon fiber lens.

[0010] Preferably, the thickness of the shell is less than or equal to 0.8 mm.

[0011] Preferably, the inner wall of the housing is provided with a receiving groove for accommodating the magnet ring, and the height of the receiving groove is the same as the thickness of the magnet ring.

[0012] Preferably, the back of the housing has an ornament or pattern integrally formed with the housing and made of metallic or non-metallic materials.

[0013] The present invention has the following beneficial effects: 1. Ultra-thin design: By using a shell made of glass fiber or aramid fiber composite material, combined with an optimized structural design, the thickness of the phone case can be controlled to 0.8mm or less, which greatly reduces the overall weight of the phone, while maintaining the strength and toughness of the phone case, providing users with a lighter and thinner feel.

[0014] 2. Optimized Magnetic Adhesion: The magnetic ring on the inner wall of the case not only enables magnetic attachment to devices such as car mounts, but also ensures that the ultra-thin characteristics of the phone case are not compromised because the magnetic ring is less than 0.5mm thick. Furthermore, the exposed surface of the magnetic ring is flush with the surface of the case, avoiding any undesirable surface protrusions and improving both the aesthetics and user comfort of the phone case.

[0015] 3. Enhanced Lens Protection: The lens protection ring on the case, positioned corresponding to the rear camera lens, features a snap-fit ​​structure that effectively protects the lens from scratches and impacts. This snap-fit ​​design ensures a more secure connection between the lens protection ring and the case, preventing it from easily falling off and improving the phone case's durability.

[0016] 4. Exquisite Design Details: The sides of the case are reinforced with edging to wrap around the phone, effectively preventing friction and collisions between the case and the phone, protecting it from damage. Additionally, the back of the case can feature integrated decorative elements or patterns, enhancing its aesthetics and personalization.

[0017] In summary, the ultra-thin magnetic composite material protective case provided by this utility model not only has the characteristics of being ultra-thin and lightweight, but also has advantages such as magnetic attraction, lens protection, and exquisite detail design, which can provide users with a better user experience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an ultrathin magnetic composite material protective shell in one embodiment;

[0019] Figure 2 for Figure 1 Exploded view of the ultrathin magnetic composite material protective shell in the embodiment shown;

[0020] Figure 3 This is a schematic diagram of the lens protection ring in one embodiment;

[0021] Figure 4 This is a schematic diagram of the structure of the ultrathin magnetic composite material protective shell in another embodiment;

[0022] Figure 5 This is a schematic diagram of the lens protection ring in another embodiment. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] Example 1

[0025] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides an ultra-thin magnetic composite material protective case, which includes a shell 1. The shell 1 can be made of glass fiber, aramid fiber, carbon fiber, bamboo or wood, or a composite of one or more of the following materials: carbon fiber, bamboo, wood, glass fiber, and aramid fiber. Different materials are used according to customer needs. Edge bands 2 are formed on the opposite long edges of the shell 1 to wrap the edges of the mobile phone. The ends of the edge bands 2 are arc-shaped surfaces 20, which can effectively protect the corners of the mobile phone. A lens protection ring 3 is provided on the shell 1 at the corresponding position of the rear camera of the mobile phone. The lens protection ring 3 has a fastening structure. The lens protection ring 3 can effectively protect the mobile phone lens from scratches and impacts.

[0026] Specifically, the lens protective ring 3 has an opening 10 in the corresponding housing 1, and a stepped groove 11 is provided on the upper surface of the opening 10. The fastening structure is engaged with the stepped groove 11. The lens protective ring 3 includes a lens ring 30, and the fastening structure is provided on the lens ring 30. The fastening structure includes a slot 32 on the lens ring 30 and a horizontally extending edge 33 formed on the upper end of the slot 32. The side wall of the opening 10 is inserted into the slot 32, and the stepped groove 11 contacts the edge 33. The depth of the stepped groove 11 is the same as the thickness of the edge 33, so that the inner wall of the housing 1 is flush with the edge 33, avoiding scratches on the mobile phone. The design of the fastening structure makes the connection between the lens protective ring 3 and the housing 1 more secure and less likely to fall off, improving the durability of the mobile phone case.

[0027] In an optional embodiment, the lens ring 30 can be made of metal, plastic, carbon fiber, or CNC machined from a rigid material. Depending on the specific needs, different materials can be used to make the lens ring 30 to meet the needs of different customers and improve product diversity.

[0028] To enable magnetic attachment of the phone to devices such as car mounts, a magnetic ring 4 with an exposed top is provided on the inner wall of the housing 1. The inner wall of the housing 1 also has a receiving groove 12 to accommodate the magnetic ring 4. The height of the receiving groove 12 is the same as the thickness of the magnetic ring 4, ensuring that the exposed surface of the magnetic ring 4 is flush with the surface of the housing 1. This magnetic ring 4 not only achieves magnetic attachment to devices such as car mounts but also ensures a smooth appearance of the phone case, without affecting the user experience. Furthermore, the design of the receiving groove 12 makes the installation of the magnetic ring 4 more secure, avoiding the problem of weakened or failed magnetic force due to loosening of the magnetic ring 4. At the same time, the flushness of the magnetic ring 4 with the surface of the housing 1 also avoids scratches or damage caused by the protruding magnetic ring 4, further improving the protective performance of the phone case. It not only meets the user's practical needs for the phone case but also takes aesthetics into account, providing a superior user experience.

[0029] In one embodiment, a magnet is also provided on the housing 1 on the side of the magnet ring 4 to improve the magnetic attraction effect. The magnet is embedded in the inner wall of the housing 1, and the surface of the magnet is flush with the surface of the inner wall of the housing 1. The thickness of the magnet can be set to be less than or equal to the thickness of the magnet ring 4 to ensure the ultra-thin nature of the housing 1.

[0030] To ensure the ultra-thin nature of the casing 1, the thickness of the magnet is set to be less than 0.5mm, which ensures that the thickness of the casing 1 is less than or equal to 0.8mm. This satisfies the magnetic adsorption and fixation function while also ensuring the phone case is lightweight and portable.

[0031] Example 2

[0032] Please see Figure 4 and Figure 5This embodiment provides an ultra-thin magnetic composite material protective case, which includes a shell 1-2. The shell 1-2 can be made of glass fiber, aramid fiber, carbon fiber, bamboo or wood, or a composite of one or more of the following materials: carbon fiber, bamboo, wood, glass fiber, and aramid fiber. Different materials are used according to customer needs. The shell 1-2 has edging 2-2 formed around its four edges to wrap around the edges of the phone. The edging 2-2 corresponding to the phone's buttons has button slots, and the edging 2-2 corresponding to the phone's speaker and charging port has through slots. The shell 1-2 has a protective layer 3-2 at the position corresponding to the phone's rear camera. The protective layer 3-2 is integrally formed with the shell 1-2 and has a clearance hole 10-2 corresponding to the phone's rear camera. The protective layer 3-2 has a lens protection ring 3-2 with a snap-fit ​​structure. In this embodiment, the lens protective ring 3-2 can be made of metal, plastic, carbon fiber, or hard material through CNC machining. Different materials can be used to make the lens ring 30 according to different needs to meet the needs of different customers and improve product diversity.

[0033] In this embodiment, the lens protective ring 3-2 is oxidized after CNC machining, and then the lens protective ring 3-2 is installed in a fixture during molding. It is then vacuum-formed with the housing 1-2. After molding, the lens protective ring 3-2 and the aramid housing 1-2 are fused together by resin curing.

[0034] Specifically, the fastening structure features a protruding edge 4-2 extending along the thickness of the lens protective ring 3. A recessed groove 40-2 is located at the top of the protruding edge. During the molding process, the protective layer 3-2 is partially formed within the recessed groove 40-2 and partially encloses the protruding edge 4-2. This design not only enhances the connection strength between the lens protective ring 3-2 and the protective layer but also ensures the stability of the lens protective ring 3-2, effectively preventing lens damage caused by accidental drops or collisions. Furthermore, the cooperation between the protruding edge 4-2 and the recessed groove 40-2 provides a good sealing effect, preventing dust, moisture, and other impurities from entering the rear camera area of ​​the phone, further protecting the cleanliness and safety of the phone lens.

[0035] To enable magnetic attachment of the phone to devices such as car mounts, a magnetic ring 5-2 with its top exposed is provided on the inner wall of the housing 1-2. The inner wall of housing 1-2 also has a receiving groove to accommodate the magnetic ring 5-2. The height of the receiving groove is the same as the thickness of the magnetic ring 5-2, ensuring that the exposed surface of the magnetic ring 5-2 is flush with the surface of housing 1-2. This design of the magnetic ring 5-2 not only achieves magnetic attachment to devices such as car mounts but also ensures a smooth appearance of the phone case, without affecting the user experience. Furthermore, the receiving groove design makes the installation of the magnetic ring 5-2 more secure, preventing weakened or failed magnetic force due to loosening of the magnetic ring 5-2. At the same time, the flushness of the magnetic ring 5-2 with the surface of housing 1-2 also prevents scratches or damage caused by the protruding magnetic ring 5-2, further improving the protective performance of the phone case. This design not only meets the user's practical needs for a phone case but also takes aesthetics into account, providing a superior user experience.

[0036] In the above embodiments 1 and 2, in order to better attract customers, the back of the shell 1 has an ornament or pattern integrally formed with the shell 1 and made of metal or non-metal materials. The design of the ornament or pattern not only enhances the aesthetics of the protective shell, but also highlights the user's personality and taste.

[0037] In summary, the ultra-thin magnetic composite material protective cases in Examples 1 and 2, by using glass fiber, aramid fiber, or their composite materials to make the shell 1, ensure the strength and durability of the protective case. Combined with the optimized structural design, the thickness of the phone case can be controlled to 0.8mm or less, significantly reducing the overall weight of the phone. Meanwhile, the edge-covering design 2 effectively protects the corners of the phone, preventing damage caused by accidental drops or collisions. The snap-fit ​​structure design of the lens protection ring 3 not only improves the connection between the lens protection ring 3 and the shell 1 but also effectively prevents the phone lens from being scratched or impacted. Furthermore, the magnetic ring 4 and the magnet allow the protective case to be magnetically attached to devices such as car mounts, meeting users' needs for practicality in phone cases.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An ultra-thin magnetic composite protective case, characterized in that, The application relates to a shell made of carbon fiber material, bamboo wood or aramid fiber material, at least two side edges of the shell are shaped with edge wrapping for wrapping the edges of a mobile phone; a lens protection ring is arranged at the corresponding position of the rear camera lens of the mobile phone, the lens protection ring is provided with a buckling structure; a magnet ring is arranged on the inner wall of the shell, the exposed surface of the magnet ring is flush with the surface of the shell, and the thickness of the magnet is less than 0.5 mm. An opening is arranged on the shell corresponding to the lens protection ring, a stepped groove is arranged on the upper end face of the opening, and the buckling structure is clamped in the stepped groove.

2. The ultra-thin magnetically attractive composite protective case of claim 1, wherein, The lens protection ring comprises a lens ring, the buckling structure is arranged on the lens ring, the buckling structure comprises a clamping groove arranged on the lens ring and a clamping edge horizontally extended and outwardly extended on the upper end of the clamping groove, the side wall of the opening is inserted into the clamping groove, and the stepped groove is in contact with the clamping edge; the lens ring is made of hardware, plastic or carbon fiber lens.

3. The ultra-thin magnetically attractive composite protective case of claim 2, wherein, A protection layer is arranged on the shell corresponding to the lens protection ring, the protection layer is integrated with the shell, the protection layer is provided with a clearance hole corresponding to the rear camera lens of the mobile phone, and the lens protection ring is formed on the protection layer.

4. The ultra-thin magnetically attractive composite protective case of claim 1, wherein, The buckling structure of the lens protection ring is a convex edge, the convex edge extends along the thickness direction of the lens protection ring, the convex edge is provided with an inlay groove at the top end, part of the protection layer is formed in the inlay groove during the forming of the protection layer, and part of the protection layer wraps the convex edge; the lens ring is made of hardware, plastic or carbon fiber lens.

5. The ultra-thin magnetically attractive composite protective case of claim 4, wherein, The thickness of the shell is less than or equal to 0.8 mm.

6. The ultra-thin magnetically attractive composite protective case of claim 1, wherein, The inner wall of the shell is provided with a containing groove capable of containing the magnet ring, and the height of the containing groove is consistent with the thickness of the magnet ring.

7. The ultra-thin magnetically attractive composite protective case of claim 1, wherein, The back of the shell is provided with a decoration or pattern which is integrally formed with the shell and is composed of metal material or non-metal material.

8. The ultra-thin magnetically attractive composite protective case of claim 1, wherein, ​