Epoxy foamed back cover

Abstract

The utility model relates to mobile phone / panel technical field especially is a kind of epoxy foaming back cover, the epoxy foaming back cover, including integrally-formed plate body and frame;Wherein, back cover is made of composite board material, and the composite board material includes epoxy resin foam layer, epoxy glass fiber layer, base color layer, first sealing layer, logo layer, protective layer sequentially arranged from inside to outside;Epoxy resin foam layer has good buffering performance, and the buffering capacity of epoxy foaming back cover is improved after epoxy resin foam layer and epoxy glass fiber layer are combined, and the components inside mobile phone / panel can be better protected.Simultaneously, epoxy resin foam layer can absorb impact force, and also prevent epoxy glass fiber layer from breaking when impacted.

Description

Technical Field

[0001] This utility model relates to the field of mobile phone / tablet technology, and in particular to an epoxy foam back cover. Background Technology

[0002] Back covers are one of the accessories for tablets / phones. They provide protection for the phone / tablet, preventing it from being damaged by drops.

[0003] Some mobile phone back covers on the market are made of fiberglass. Fiberglass is a relatively brittle material with poor cushioning ability. Therefore, when a mobile phone / platform is dropped, a fiberglass back cover / tablet may not be able to protect the internal components.

[0004] For example, Chinese patent application number CN202322529209.4 describes a 3.5D printed back cover. In this case, the base layer is a fiberglass epoxy resin component, which has poor cushioning capabilities and may not be able to protect internal components when the phone is dropped.

[0005] For example, Chinese patent application number CN202020523253.8 describes a novel electronic product casing, comprising a body: the body includes a coating layer, a resin layer, and a fiberglass layer, wherein the resin layer is used to bond the coating layer and the fiberglass layer. This type of casing, made of fiberglass epoxy resin, has poor cushioning capabilities and may not be able to protect internal components when a mobile phone or tablet is dropped. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main objective is to provide an epoxy foam back cover made of glass fiber, which has good cushioning ability and can effectively protect the internal components of mobile phones / tablets, thereby overcoming the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides an epoxy foam back cover, including an integrally molded plate and a frame; wherein the back cover is made of a composite board, which includes, from the inside out, an epoxy resin foam layer, an epoxy glass fiber layer, a base color layer, a first sealing layer, a logo layer, and a protective layer.

[0009] Preferably, a connecting layer is provided between the epoxy resin foam layer and the epoxy glass fiber layer, and the connecting layer is one of urethane adhesive, neoprene rubber adhesive, silicone adhesive, and epoxy resin adhesive.

[0010] Preferably, the top and bottom surfaces of the epoxy glass fiber layer are roughened.

[0011] Preferably, the base color layer is one of acrylic resin, epoxy resin, or polyurethane.

[0012] Preferably, the first sealing layer and the protective layer are one of acrylic resin, epoxy resin, and polyurethane.

[0013] Preferably, the logo layer includes a carrier layer, hot stamping foil, and a second cover layer, with the carrier layer and the second cover layer sandwiching the hot stamping foil.

[0014] Preferably, the carrier layer and the second seal layer are one of acrylic resin, epoxy resin, and polyurethane.

[0015] Preferably, a thermally conductive metal layer is sandwiched within the epoxy glass fiber layer.

[0016] Preferably, the back cover has a frame and a plate; the frame is provided with volume key holes and power key holes; the plate is provided with a camera hole, and a raised ring is formed on the outer periphery of the camera hole.

[0017] This invention has significant advantages and beneficial effects compared to existing technologies. Specifically, as shown in the above technical solution, the epoxy foam back cover is an integrally molded panel and frame. The back cover is made of composite material. The composite material includes, from the inside out, an epoxy resin foam layer, an epoxy fiberglass layer, a base color layer, a first sealing layer, a logo layer, and a protective layer. The epoxy resin foam layer has excellent cushioning performance. The combination of the epoxy resin foam layer and the epoxy fiberglass layer improves the cushioning capacity of the epoxy foam back cover, better protecting the internal components of the phone / tablet. Simultaneously, the epoxy resin foam layer absorbs impact force and prevents the epoxy fiberglass layer from shattering upon impact. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the layered structure of the composite plate according to an embodiment of the present invention.

[0019] Figure 2 This is a rear view schematic diagram of the epoxy foam back cover according to an embodiment of the present invention.

[0020] Figure 3 This is a front view schematic diagram of the epoxy foam back cover according to an embodiment of the present invention.

[0021] Figure 4 This is a side view of the epoxy foam back cover according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the epoxy foam back cover manufacturing process according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached diagram:

[0024] 10. Panel; 11. Camera hole; 12. Raised ring; 13. Frame; 14. Volume button hole; 15. Power button hole; 20. Composite board; 21. Epoxy resin foam layer; 22. Connecting layer; 23. Epoxy fiberglass layer; 24. Base color layer; 25. First seal layer; 26. Protective layer; 210. Logo layer; 211. Load-bearing layer; 212. Hot stamping foil; 213. Second seal layer. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0026] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is an epoxy foam back cover.

[0027] The epoxy fiberglass layer 23 has an epoxy resin foam layer 21 disposed on its inner side, which provides excellent cushioning for the epoxy foam back cover and effectively protects the internal components of the phone / tablet. At the same time, the epoxy resin foam layer 21 can absorb impact energy, improve the protective ability of the epoxy foam back cover itself, and prevent the epoxy foam back cover from breaking.

[0028] This application provides an epoxy foam back cover, including an integrally molded plate 10 and a frame 13. The back cover is made of a composite board 20, which includes, from the inside out, an epoxy resin foam layer 21, an epoxy fiberglass layer 23, a base color layer 24, a first sealing layer 25, a logo layer 210, and a protective layer 26. The epoxy resin foam layer 21 is a layered structure of plastic with epoxy resin as the base material and numerous micropores inside. The epoxy fiberglass layer 23 is made by stacking multiple layers of fiberglass and then pressing them into a plate-like structure in a mold. The base color layer 24 has color, providing better aesthetics and highlighting the logo layer 210. In this embodiment, the first sealing layer 25, logo layer 210, and protective layer 26 are transparent. The epoxy resin foam layer 21 provides excellent cushioning for the epoxy foam back cover, effectively protecting the internal components of the phone / tablet. Meanwhile, the epoxy resin foam layer 21 can absorb impact energy, improving the protective capability of the epoxy foam back cover and preventing it from cracking. Preferred production steps: 1. Multiple layers of epoxy fiberglass 23 are stacked and placed in a mold to press into the initial shape of the back cover. 2. The initial back cover is machined using CNC equipment. 3. Epoxy resin foam layer 21 is sprayed onto the inner side of the back cover, while the mold presses against the epoxy resin foam layer 21 to set its shape. 4. A base color layer 24 is sprayed onto the outer surface of the back cover. 5. A first sealing layer 25 is sprayed onto the base color layer 24. 6. The logo layer 210 is applied to the base color layer 24 using a pasting / spraying / printing method. 7. A protective layer 26 is sprayed onto the base color layer 24 and the logo layer 210, and the logo layer 210 is encapsulated within the base color layer 24.

[0029] Preferably, a connecting layer 22 is provided between the epoxy resin foam layer 21 and the epoxy glass fiber layer 23. This connecting layer 22 is one of urethane adhesive, neoprene rubber adhesive, silicone adhesive, or epoxy resin adhesive. The connecting layer 22 improves the bonding strength between the epoxy resin foam layer 21 and the epoxy glass fiber layer 23, making the bond between them more secure. In this embodiment, the connecting layer 22 is an epoxy resin adhesive, which can be cured using ultraviolet light. During production, the epoxy resin foam layer 21 is sprayed onto the connecting layer 22 while the epoxy resin adhesive is semi-cured, resulting in a better bonding effect and excellent adhesion.

[0030] Preferably, the top and bottom surfaces of the epoxy fiberglass layer 23 are roughened. The roughened surfaces are preferably formed by sandblasting. The roughened surfaces allow for a stronger bond between the epoxy resin foam layer 21 and the epoxy fiberglass layer 23, and between the epoxy fiberglass layer 23 and the base color layer 24, which is more conducive to curing.

[0031] Preferably, the base color layer 24 is one of acrylic resin, epoxy resin, and polyurethane. Color powder is incorporated into the base color layer 24, so a color layer is formed after the base color layer 24 solidifies. In this embodiment, the base color layer 24 is acrylic resin, which can be cured using ultraviolet light, thus improving production efficiency.

[0032] Preferably, the first sealing layer 25 and the protective layer 26 are one of acrylic resin, epoxy resin, and polyurethane. In this embodiment, the first sealing layer 25 and the protective layer 26 are transparent acrylic resin layers. Both the first sealing layer 25 and the protective layer 26 can be rapidly cured using ultraviolet light.

[0033] Preferably, the logo layer 210 includes a carrier layer 211, hot stamping foil 212, and a second sealing layer 213, with the carrier layer 211 and the second sealing layer 213 sandwiching the hot stamping foil 212. During production, the carrier layer 211 is sprayed into a pre-designed groove; after the carrier layer 211 has partially or fully cured, the hot stamping foil 212 is placed on the carrier layer 211; then the second sealing layer 213 is sprayed onto the carrier layer 211 and the hot stamping foil 212, encapsulating the hot stamping foil 212 within the carrier layer 211. The logo layer 210 is pre-designed; after the first sealing layer 25 is sprayed, the logo layer 210 is placed on the first sealing layer 25, followed immediately by the spraying of the protective layer 26. This design helps improve the production efficiency of the back cover.

[0034] Preferably, the carrier layer 211 and the second seal layer 213 are one of acrylic resin, epoxy resin, and polyurethane. In this embodiment, the carrier layer 211 and the second seal layer 213 are acrylic resin, which can be cured by ultraviolet light, resulting in high production efficiency.

[0035] Preferably, a thermally conductive metal layer is sandwiched within the epoxy fiberglass layer 23. The presence of a mesh-like thermally conductive metal layer sandwiched between upper and lower epoxy fiberglass layers 23, or between multiple epoxy fiberglass layers 23, improves the thermal conductivity of the epoxy fiberglass layer 23, thereby enhancing the heat dissipation capacity of the back cover. The thermally conductive metal layer is preferably a copper mesh with a very small wire diameter.

[0036] Preferably, the back cover has a frame 13 and a plate 10; the frame 13 is provided with a volume button hole 14 and a power button hole 15; the plate 10 is provided with a camera hole 11, and a protruding ring 12 is formed on the outer periphery of the camera hole 11. The protruding ring 12 is located on the outer side of the plate 10, so that when the phone / tablet is placed flat, the protruding ring 12 can support the back cover and prevent the lens from being scratched.

[0037] In summary, the key design feature of this invention is that the back cover is made of composite board 20. An epoxy resin foam layer 21 is disposed on the inner side of the epoxy fiberglass layer 23. The epoxy resin foam layer 21 has excellent cushioning properties; the combination of the epoxy resin foam layer 21 and the epoxy fiberglass layer 23 enhances the cushioning capacity of the back cover, better protecting the internal components of the phone / tablet. Simultaneously, the epoxy resin foam layer 21 absorbs impact force and prevents the epoxy fiberglass layer 23 from shattering upon impact.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An epoxy foam back cover, characterized in that: It includes a one-piece molded panel and frame; the back cover is made of composite board, which includes, from the inside out, an epoxy resin foam layer, an epoxy fiberglass layer, a base color layer, a first sealing layer, a logo layer, and a protective layer.

2. The epoxy foam back cover according to claim 1, characterized in that: A connecting layer is provided between the epoxy resin foam layer and the epoxy glass fiber layer. This connecting layer is one of urethane adhesive, chloroprene rubber adhesive, silicone adhesive, and epoxy resin adhesive.

3. The epoxy foam back cover according to claim 1, characterized in that: The top and bottom surfaces of the epoxy glass fiber layer are roughened.

4. An epoxy foam back cover according to claim 1 or 3, characterized in that: The base color layer is one of acrylic resin, epoxy resin, or polyurethane.

5. The epoxy foam back cover according to claim 1, characterized in that: The first sealing layer and protective layer are one of acrylic resin, epoxy resin, and polyurethane.

6. The epoxy foam back cover according to claim 1, characterized in that: The logo layer includes a carrier layer, hot stamping foil, and a second cover layer, with the carrier layer and the second cover layer sandwiching the hot stamping foil.

7. An epoxy foam back cover according to claim 6, characterized in that: The carrier layer and the second sealing layer are one of acrylic resin, epoxy resin, and polyurethane.

8. The epoxy foam back cover according to claim 1, characterized in that: A thermally conductive metal layer is sandwiched within the epoxy glass fiber layer.

9. An epoxy foam back cover according to claim 1, characterized in that: The frame is provided with volume key holes and power key holes; the plate is provided with camera holes, and a raised ring is formed on the outer periphery of the camera holes.

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