Magnetic attraction type gilding pattern protection back cover

Abstract

The application relates to the technical field of mobile phone shells, in particular to a magnetic gold stamping pattern protection back cover which comprises a shell, the shell comprises transparent acrylic plates, a gold stamping layer, a base material and a magnetic attraction assembly which are sequentially stacked, the gold stamping layer is arranged on the surface of the base material, the base material and the gold stamping layer form a composite layer and are fixedly attached to the back surface of the acrylic plate, and the magnetic attraction assembly is fixedly attached to the side surface of the base material away from the acrylic plate. The device adopts transparent acrylic plates as wear-resistant and light-transmitting surface layers, the inner composite gold stamping layer and the base material present dynamic metal luster, and the back surface is integrated with the magnetic attraction assembly to realize rapid adsorption. The application has the characteristics of protecting the gold stamping pattern.

Description

Technical Field

[0001] This application relates to the field of mobile phone case technology, and in particular to a magnetic hot stamping pattern protective back cover. Background Technology

[0002] Phone cases not only protect phones from physical damage during daily use, but also serve a decorative purpose through diverse designs, colors, or patterns, satisfying users' aesthetic needs and personal expression.

[0003] In related technologies, hot stamping has been widely used in electronic device housings. It involves transferring metal foil to the surface of a substrate to form a pattern through high-temperature printing, and then covering the hot stamping layer with a PET or PVC film. The process is simple and low-cost.

[0004] Existing hot stamping pattern phone cases have the following problems: after using a protective film, the film layer is prone to scratches and yellowing during long-term use, affecting the metallic luster. Summary of the Invention

[0005] To protect the hot stamping pattern, this application provides a magnetic hot stamping pattern protective back cover.

[0006] The magnetic hot stamping pattern protective back cover provided in this application adopts the following technical solution: A magnetic hot stamping pattern protective back cover includes a housing, the housing comprising a transparent acrylic sheet, a hot stamping layer, a substrate, and a magnetic assembly stacked sequentially. The hot stamping layer is disposed on the surface of the substrate, the substrate and the hot stamping layer form a composite layer and are adhered and fixed to the back of the acrylic sheet, and the magnetic assembly is adhered and fixed to the side of the substrate away from the acrylic sheet.

[0007] By adopting the above solution, the acrylic sheet has high light transmittance and physical protection capabilities. It can be combined with hot stamping to form a decorative effect that combines metallic luster with transparent texture. The magnetic components are fixed inside the shell through the substrate, enabling the shell to be quickly adsorbed and positioned with other magnetic accessories.

[0008] The back of the acrylic sheet is provided with a recessed portion, which is adapted to the composite layer. The composite layer is embedded in the recessed portion and sealed and fixed by adhesive.

[0009] By adopting the above solution, the recessed portion matches the shape of the composite layer, reducing embedding offset, reducing edge adhesive overflow, and improving overall bending resistance.

[0010] Preferably, after the composite layer is embedded, the recessed portion is flush with the back of the acrylic sheet.

[0011] By adopting the above solution, the back of the shell is made smooth and without protrusions, reducing dust accumulation gaps.

[0012] Preferably, the substrate is pre-coated with an inkjet pattern, and the hot stamping layer is formed on the surface of the substrate by hot pressing transfer, with the inkjet pattern and the hot stamping layer being offset from each other.

[0013] By adopting the above solution, the occurrence of pattern overlap is reduced, and the inkjet printing pattern and the staggered hot foil layer form a three-dimensional overprinting effect. The difference in light reflection enhances the sense of design layering and improves visual recognition.

[0014] Preferably, the magnetic suction assembly includes a magnetic ring and an ultra-thin PET sheet, wherein the magnetic ring is bonded and fixed to the surface of the substrate away from the acrylic sheet by the ultra-thin PET sheet.

[0015] By adopting the above solution, the magnetic ring incorporates a strong magnetic material to provide active adsorption force for the casing. The ultra-thin PET sheet serves as the double-sided adhesive material, and after bonding, it barely increases the overall thickness of the magnetic assembly, thus reducing the impact of casing thickness on wireless charging efficiency. Preferably, the shell is flat and has no edge covering structure.

[0016] By adopting the above solution, the influence of the shell on magnetic field penetration is reduced, which facilitates wireless charging of the magnetic components and increases the heat dissipation rate.

[0017] Preferably, the side wall of the housing has a guide notch, the width of which is approximately equal to the width of a finger.

[0018] By adopting the above solution, it is easy for users to insert their fingers into it to apply leverage, thereby easily separating the casing from the phone.

[0019] Preferably, the housing has a clearance notch corresponding to the mobile phone camera module, and the connection between the clearance notch and the housing is rounded.

[0020] By adopting the above solution, the occurrence of scratches to the camera module or human hands caused by the hard edges of the casing can be reduced.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Acrylic sheets utilize their high light transmittance and physical protection capabilities, combined with hot stamping layers to create a decorative effect that combines metallic luster with a transparent texture. The magnetic components are fixed inside the housing through the substrate, enabling rapid adsorption and positioning of the housing and magnetic accessories, thus giving the device both light transmittance and protection. 2. It ensures user grip comfort while improving convenience; 3. Reduced dust accumulation areas and extended cleaning cycles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0023] Figure 2 This is an exploded view of an embodiment of this application.

[0024] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Acrylic sheet; 12. Recess; 13. Composite layer; 14. Magnetic assembly; 141. Magnetic ring; 142. Ultra-thin PET sheet; 15. Guide notch; 16. Alternating notch; 161. Rounded arc treatment. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0026] This application discloses a magnetic hot stamping pattern protective back cover. (See also...) Figure 1-2 A magnetic hot stamping pattern protective back cover includes a housing 1. The housing 1 includes a transparent acrylic sheet 11, a hot stamping layer, a substrate, and a magnetic component 14, which are stacked in sequence. The hot stamping layer is formed on the surface of the substrate by hot pressing transfer. The substrate and the hot stamping layer form a composite layer 13 and are attached and fixed to the back of the acrylic sheet 11. The magnetic component 14 is attached and fixed to the side of the substrate away from the acrylic sheet 11, so as to realize the quick adsorption and positioning of the housing 1 and other magnetic accessories.

[0027] Correspondingly, the acrylic sheet 11 has high light transmittance, which can maximize the transmission of light and make the metallic luster of the hot stamping layer present dynamic light and shadow effects at different angles, enhancing the three-dimensionality of the pattern. As a covering layer, the acrylic sheet 11 has moderate hardness, which can effectively resist the wear and tear of the hot stamping layer caused by daily friction and reduce the risk of the pattern falling off.

[0028] Furthermore, the toughness of acrylic makes it less prone to breakage when subjected to external impact, reducing the possibility of damage to the hot stamping layer due to breakage. At the same time, its lightweight properties reduce the overall weight of the casing 1.

[0029] Specifically, a recess 12 is provided on the back of the acrylic sheet 11. The size and depth of the recess 12 are adapted to the size and thickness of the composite layer 13. The composite layer 13 is embedded in the recess 12 and sealed and fixed by adhesive. After the composite layer 13 is embedded in the recess 12, it is flush with the back of the acrylic sheet 11.

[0030] Therefore, by matching the shape of the composite layer 13, the recess 12 reduces the lateral displacement of the composite layer 13 during insertion and the occurrence of edge glue overflow. After adhesive sealing, the composite layer 13 and the acrylic plate 11 form an integral structure, which improves the bending resistance of the shell 1.

[0031] Furthermore, the back of the shell 1 is smooth and without protrusions, forming a uniform load-bearing surface after the adhesive has cured. This reduces the risk of stress concentration and cracking caused by local protrusions. The flush structure also reduces the abrupt refraction when light penetrates the acrylic plate 11 perpendicularly, thereby reducing the occurrence of visual distortion or edge ghosting of the hot stamping pattern due to light path distortion.

[0032] Meanwhile, compared to stepped structures, flush structures reduce the accumulation of dust in gaps, excess adhesive contamination of the magnetic components 14, and the occurrence of issues with the top cover of the phone case.

[0033] On the other hand, the substrate is pre-sprayed with inkjet patterns. By setting the inkjet patterns and hot stamping layers in a staggered manner, the patterns are transferred on the substrate surface by heat pressing to reduce pattern overlap. The inkjet patterns and staggered hot stamping layers form a three-dimensional overprinting effect. The difference in light reflection enhances the sense of design layering and improves visual recognition.

[0034] Furthermore, the staggered layout reduces the problem of ink smudging caused by high temperatures during hot-press transfer, and lowers the registration accuracy requirements.

[0035] In addition, the magnetic assembly 14 includes a magnetic ring 141 and an ultra-thin PET sheet 142. The magnetic ring 141 is bonded and fixed to the side of the substrate away from the acrylic plate 11 by the ultra-thin PET sheet 142.

[0036] Correspondingly, the magnetic ring 141 endows the shell 1 with magnetic attraction through the built-in strong magnetic material, making it compatible with external magnetic accessories such as magnetic power banks, card holders, and heat sinks, and achieving a "second-fit" effect, forming a "one shell, multiple uses" smart ecosystem.

[0037] Furthermore, when the charging base is powered on, the internal coil generates a high-frequency alternating magnetic field. This magnetic field can penetrate the gaps in the phone's casing. The receiving coil inside the magnetic ring 141 generates an induced current after cutting the magnetic field lines. This current is then converted into DC power by a rectifier and voltage regulator circuit and input into the phone's battery to complete the charging process. In other words, the magnetic ring 141 is both a magnetic field aligner and an energy receiver.

[0038] Meanwhile, the ultra-thin PET sheet 142, as a double-sided adhesive material, is resistant to high temperature and chemical corrosion. The adhesive layer is not prone to failure in humid or temperature-different environments, which improves the long-term reliability of the magnetic ring 141. Moreover, after bonding, it hardly increases the overall thickness of the magnetic component 14, reducing the impact of the shell 1 thickness on the wireless charging efficiency.

[0039] On the other hand, the shell 1 is flat and has no edge structure, which reduces the influence of the shell 1 on the penetration of magnetic field, facilitates the wireless charging of the magnetic component 14, and increases the heat dissipation channel to improve heat dissipation efficiency.

[0040] In addition, in this embodiment, the top sidewall of the housing 1 is provided with a guide notch 15 with a width that can accommodate a finger. This structural design mainly serves the function of easy disassembly. The guide notch 15 serves as a leverage point, making it easy for the user to insert their finger into it to apply leverage, thereby easily separating the housing 1 from the mobile phone.

[0041] Furthermore, the housing 1 has a clearance notch 16 corresponding to the mobile phone camera module, and the connection between the clearance notch 16 and the housing 1 is rounded 161. The edge of the notch maintains a safe distance from the metal ring of the camera, reducing the possibility of the hard edge of the housing 1 scratching the camera module or the user's hand.

[0042] The implementation principle of a magnetic hot stamping pattern protective back cover according to an embodiment of this application is as follows: a transparent acrylic sheet 11 serves as the surface layer of the shell 1, and the hot stamping layer and the substrate together form a composite layer 13 fixed to the inside of the acrylic sheet 11. The magnetic component 14 is installed on the back of the substrate to achieve rapid adsorption with other magnetic accessories. The overall structural design takes into account both practicality and functionality. The high light transmittance of the acrylic sheet 11 highlights the metallic luster of the hot stamping layer below, forming a dynamic light and shadow effect, while providing wear-resistant protection.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A magnetic hot stamping pattern protective back cover, characterized in that, The housing (1) includes a transparent acrylic sheet (11), a hot stamping layer, a substrate, and a magnetic suction assembly (14) stacked in sequence. The hot stamping layer is disposed on the surface of the substrate. The substrate and the hot stamping layer form a composite layer (13) and are attached and fixed to the back of the acrylic sheet (11). The magnetic suction assembly (14) is attached and fixed to the side of the substrate away from the acrylic sheet (11).

2. The magnetic hot stamping pattern protective back cover according to claim 1, characterized in that, The back of the acrylic sheet (11) is provided with a recess (12), the recess (12) is adapted to the composite layer (13), the composite layer (13) is embedded in the recess (12) and sealed and fixed by adhesive.

3. The magnetic hot stamping pattern protective back cover according to claim 2, characterized in that, After the composite layer (13) is embedded, the recess (12) becomes flush with the back of the acrylic plate (11).

4. The magnetic hot stamping pattern protective back cover according to claim 1, characterized in that, The substrate is pre-coated with a spray-painted pattern, and the hot stamping layer is formed on the surface of the substrate by hot pressing transfer. The spray-painted pattern and the hot stamping layer are offset from each other.

5. A magnetic hot stamping pattern protective back cover according to claim 1, characterized in that, The magnetic assembly (14) includes a magnetic ring (141) and an ultra-thin PET sheet (142). The magnetic ring (141) is bonded and fixed to the surface of the substrate away from the acrylic plate (11) by the ultra-thin PET sheet (142).

6. A magnetic hot stamping pattern protective back cover according to claim 1, characterized in that, The shell (1) is flat and has no edge structure.

7. A magnetic hot stamping pattern protective back cover according to claim 6, characterized in that, The side wall of the housing (1) is provided with a guide notch (15), the width of which is approximately equal to the width of a finger.

8. A magnetic hot stamping pattern protective back cover according to claim 6, characterized in that, The housing (1) has a clearance notch (16) corresponding to the mobile phone camera module, and the connection between the clearance notch (16) and the housing (1) is rounded (161).

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