PU electronic equipment rear cover and mobile phone

Abstract

The utility model relates to the technical field of mobile phones, in particular to a PU electronic equipment rear cover and a mobile phone. Wherein the PU rear cover is attached to a first concave part formed on the bearing layer of the shell main body. Meanwhile, the shell main body comprises a bearing layer, and a connecting layer, a color lining layer, a packaging layer, a transfer printing layer and a protective layer which are sequentially arranged on the bearing layer. The bearing layer has a certain thickness and elasticity. And the connecting layer improves the connecting firmness between the bearing layer and the color contrast layer. The packaging layer separates the transfer printing layer from the color lining layer, and mutual interference is avoided. The color contrast layer has color and luster and can set off the pattern effect of the transfer printing layer. The protective layer improves the wear resistance of the shell body. Therefore, the PU rear cover not only obtains the comfortable sensation of the PU material, but also enables the visual effect and the aesthetic feeling to be better.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phones, in particular to a PU electronic equipment back cover and a mobile phone. Background Art

[0002] PU material, full name polyurethane, is a polymer material formed by polycondensation of isocyanate and polyol. Polyurethane has excellent mechanical properties, good flexibility, wear resistance and elasticity, and is widely used in many fields, such as mobile phones and tablets. The back cover of the mobile phone occupies most of the external area of ​​the entire mobile phone, so the back cover of the mobile phone greatly affects the appearance and customer's shopping desire. Some of the back covers of mobile phones are covered by the entire PU material, and the visual effect is relatively simple, so the aesthetics are relatively general.

[0003] For example, Chinese patent application number: CN202220081677.2 discloses a new type of mobile phone back cover body, characterized in that it includes a back cover body, a hot melt adhesive layer and a PU leather layer, the hot melt adhesive layer is attached to the back cover body, and the PU leather layer is attached to the hot melt adhesive layer; a circle of upward raised convex strips is integrally connected to the outer peripheral edge of the back cover body, the outer peripheral edges of the hot melt adhesive layer and the PU leather layer extend to the side of the convex strip, and the upper side of the PU leather layer is flush with the upper side of the convex strip. The PU leather layer wraps the entire back cover body, so this visual effect and aesthetic feeling are average. Utility Model Content

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a PU electronic device back cover, which not only has a PU back cover, but also has better visual effects and higher aesthetics, thereby overcoming the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides a PU electronic device back cover, comprising a shell body and a PU back cover; the shell body comprises a bearing layer, and a connecting layer, a lining layer, a packaging layer, a pad printing layer, and a protective layer sequentially arranged on the bearing layer; a first recessed portion is formed on the bearing layer, and the PU back cover is attached to the first recessed portion.

[0007] Preferably, the PU back cover includes a carrying shell and a PU leather covering the carrying shell; the carrying shell is provided with a flange, and a second recessed portion is formed between the flanges, and the PU leather is adhered to the second recessed portion by a first adhesive.

[0008] Preferably, the first adhesive is one of hot melt adhesive, pressure sensitive adhesive, epoxy resin adhesive, anaerobic adhesive and latex.

[0009] Preferably, the bearing layer is one of polypropylene, polyethylene terephthalate, epoxy glass fiber, and alumina fiber.

[0010] Preferably, heat-conductive particles are sandwiched in the bearing layer, and the heat-conductive particles are in a shape of clusters, scattered points, strips, or a mesh.

[0011] Preferably, the connecting layer is one of an epoxy resin adhesive layer, a polyurethane adhesive layer, and an acrylic adhesive layer.

[0012] Preferably, the color lining layer is one of epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer mixed with pigment, and the encapsulation layer is one of transparent epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer.

[0013] Preferably, the transfer printing layer is one of a textured epoxy resin adhesive layer, a polyurethane adhesive layer and an acrylic adhesive layer.

[0014] Preferably, the protective layer is one of acrylic resin, polyurethane, glass, and acrylic.

[0015] The present application provides a mobile phone, comprising the PU electronic device back cover, as well as a mobile phone middle plate, a circuit board, and a display screen; the circuit board and the display screen are arranged on the mobile phone middle plate, and the PU electronic device back cover is buckled on the mobile phone middle plate.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that the PU back cover is attached to the first recessed portion formed on the bearing layer of the shell body. At the same time, the shell body includes a bearing layer, and a connecting layer, a lining color layer, a packaging layer, a pad printing layer, and a protective layer sequentially arranged on the bearing layer. The bearing layer has a certain thickness and elasticity. The connecting layer improves the connection firmness between the bearing layer and the lining color layer. The packaging layer separates the pad printing layer and the lining color layer to avoid interference with each other. The lining color layer has a color that can set off the pattern effect of the pad printing layer. The protective layer improves the wear resistance of the shell body. It can be seen that the PU back cover not only obtains the comfort of the PU material, but also makes the visual effect and aesthetics better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the layered structure of the first embodiment of the utility model.

[0018] Figure 2 It is a front view schematic diagram of the first embodiment of the utility model.

[0019] Figure 3 It is a rear view schematic diagram of the first embodiment of the utility model.

[0020] Figure 4It is a schematic diagram of the product process flow of the first embodiment of the utility model.

[0021] Description of the accompanying drawings:

[0022] 10. Shell body; 11. Bearing layer; 12. Connecting layer; 13. Backing color layer; 14. Packaging layer; 15. Transfer printing layer; 16. Protective layer; 17. Thermal conductive particles; 110. Frame; 111. Plate; 112. Camera hole; 20. PU back cover; 21. Bearing shell; 22. First adhesive; 23. PU leather. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] Embodiment 1

[0025] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, which is a PU electronic device back cover.

[0026] The PU back cover 20 is adhered to the shell body 10, so that the PU electronic device back cover has the comfort of PU material. The connection layer 12, the lining layer 13, the packaging layer 14, the transfer layer 15, and the protective layer 16 are sequentially arranged on the bearing layer 11, so that the shell body 10 has a better visual effect and is more beautiful.

[0027] The present application provides a PU electronic device back cover, including a shell body 10 and a PU back cover 20; the shell body 10 includes a bearing layer 11, and a connecting layer 12, a lining layer 13, an encapsulation layer 14, a transfer layer 15, and a protective layer 16 sequentially arranged on the bearing layer 11; a first recessed portion is formed on the bearing layer 11, and the PU back cover 20 is attached to the first recessed portion. The PU back cover 20 is adhered to the first recessed portion formed on the bearing layer 11, so that the shell body 10 obtains the comfort of PU material and is softer. The first recessed portion is formed by CNC processing, and the first recessed portion enables the PU back cover 20 to be flush with the protective layer 16, and also allows the PU back cover 20 to be more accurately and firmly attached to the first recessed portion. The shell body 10 has multiple layers to form a composite structure. In this embodiment, the first recessed portion is arranged at a position below the mobile phone camera, just at the position where the mobile phone is held, so that the hand feel is better. Among them, the bearing layer 11 has a certain thickness and elasticity, and the thickness is preferably between 1-2mm. The connection layer 12 improves the connection firmness between the bearing layer 11 and the backing color layer 13. The encapsulation layer 14 separates the pad printing layer 15 and the backing color layer 13 to avoid interference of colors and patterns between each other. The backing color layer 13 has a color that can set off the pattern effect of the pad printing layer 15. The protective layer 16 improves the wear resistance of the shell body 10. It can be seen that the PU back cover 20 not only obtains the comfort of the PU material, but also makes the visual effect and aesthetics better.

[0028] Preferably, the PU back cover 20 includes a load-bearing shell 21, and a PU leather 23 covering the load-bearing shell 21; the load-bearing shell 21 is provided with a flange, and a second recessed portion is formed between the flanges, and the PU leather 23 is adhered to the second recessed portion through a first adhesive 22. The load-bearing shell 21 is molded by an injection molding machine. The load-bearing shell 21 is preferably made of elastic plastic, which has a certain hardness and elasticity. The PU leather 23 is relatively soft, and the PU leather 23 is adhered to the second recessed portion on the load-bearing shell 21, and then the PU leather 23 is adhered to the second recessed portion through the first adhesive 22. This design facilitates the PU back cover 20 to be accurately adhered to the load-bearing shell 21.

[0029] Preferably, the first adhesive 22 is one of hot melt adhesive, pressure sensitive adhesive, epoxy resin adhesive, anaerobic adhesive, and latex. In this embodiment, the first adhesive 22 is hot melt adhesive and pressure sensitive adhesive, and the PU back cover 20 is conveniently attached to the first recessed portion formed on the bearing layer 11 by heating or pressurizing accordingly.

[0030] Preferably, the bearing layer 11 is a layered structure made of one of polypropylene, polyethylene terephthalate, epoxy glass fiber, and alumina fiber. Polypropylene and polyethylene terephthalate are directly made into a layered structure. One or more layers of epoxy glass fiber / alumina fiber form an epoxy glass fiber board or an alumina fiber board.

[0031] The thermally conductive particles 17 are particles formed by mixing any two or more of aluminum oxide, silica fume, boron nitride, aluminum nitride, talcum powder, and titanium dioxide. The thermally conductive particles 17 are sandwiched in the carrier layer 11, and the thermally conductive particles 17 are in a shape of agglomerates, scattered dots, strips, or a mesh.

[0032] Preferably, the connecting layer 12 is one of an epoxy resin adhesive layer, a polyurethane adhesive layer, and an acrylic adhesive layer. The thickness of the connecting layer 12 is very thin, between 0.1 and 0.2 mm. The connecting layer 12 is sprayed on the bearing layer 11 and then quickly cured by an ultraviolet lamp (UV lamp), which is conducive to improving production efficiency.

[0033] Preferably, the color lining layer 13 is one of epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer mixed with pigment, and the encapsulation layer 14 is one of transparent epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer. The pigment can make the color lining layer 13 colorful, and the color of the color lining layer 13 can be set as needed without specific restrictions. The transparency of the encapsulation layer 14 makes it easy to display the color of the color lining layer 13. The thickness of the encapsulation layer 14 is very thin, between 0.1-0.2 mm. Both the color lining layer 13 and the encapsulation layer 14 can be quickly cured using ultraviolet light, and the production efficiency is very high.

[0034] Preferably, the transfer layer 15 is one of epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer with texture. Texture or pattern is printed on the transfer layer 15 by rubbing / pad printing technology. The transfer layer 15 can also be quickly cured by ultraviolet light, and the production efficiency is very high.

[0035] Preferably, the protective layer 16 is one of acrylic resin, polyurethane, glass, and acrylic. The protective layer 16 is between 0.1-0.2 mm. When the protective layer 16 is acrylic resin or polyurethane, ultraviolet light can be used for rapid curing. When the protective layer 16 is glass or acrylic, it can be attached to the transfer printing layer 15 by bonding.

[0036] The shell body 10 has a frame 110 and a plate body 111 , and a camera hole 112 is provided on the plate body 111 .

[0037] Embodiment 2

[0038] The present application provides a mobile phone, the PU electronic device back cover, and a mobile phone middle plate, a circuit board, and a display screen; the circuit board and the display screen are arranged on the mobile phone middle plate, and the PU electronic device back cover is buckled on the mobile phone middle plate. Therefore, when the mobile phone is provided with the PU electronic device back cover, the mobile phone obtains the comfort of the PU material, and also makes the visual effect and aesthetic feeling better.

[0039] In summary, the design focus of the utility model is that the PU back cover 20 is attached to the first concave portion formed on the bearing layer 11 of the shell body 10, so that the PU back cover 20 has the comfort of PU material. The bearing layer 11 is sequentially provided with a connecting layer 12, a lining layer 13, a packaging layer 14, a transfer layer 15, and a protective layer 16, so that the PU back cover 20 has a better visual effect and aesthetics.

[0040] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A PU electronic device back cover, characterized in that: It includes a shell body and a PU back cover; the shell body includes a bearing layer, and a connecting layer, a lining layer, a packaging layer, a pad printing layer, and a protective layer arranged in sequence on the bearing layer; a first recessed portion is formed on the bearing layer, and the PU back cover is attached to the first recessed portion.

2. The PU electronic device back cover according to claim 1, characterized in that: The PU back cover includes a load-bearing shell and a PU leather covering the load-bearing shell; the load-bearing shell is provided with a flange, and a second recessed portion is formed between the flanges, and the PU leather is adhered to the second recessed portion by a first adhesive.

3. The PU electronic device back cover according to claim 2, characterized in that: The first adhesive is one of hot melt adhesive, pressure sensitive adhesive, epoxy resin adhesive, anaerobic adhesive and latex.

4. The PU electronic device back cover according to claim 1, characterized in that: The bearing layer is one of polypropylene, polyethylene terephthalate, epoxy glass fiber and alumina fiber.

5. The PU electronic device back cover according to claim 4, characterized in that: The bearing layer is provided with heat-conducting particles, which are in a shape of clusters, scattered points, strips, or a net.

6. The PU electronic device back cover according to claim 1, characterized in that: The connecting layer is one of an epoxy resin adhesive layer, a polyurethane adhesive layer and an acrylic adhesive layer.

7. The PU electronic device back cover according to claim 1, characterized in that: The color lining layer is one of epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer mixed with pigment, and the encapsulation layer is one of transparent epoxy resin adhesive layer, polyurethane adhesive layer and acrylic adhesive layer.

8. The PU electronic device back cover according to claim 1, characterized in that: The transfer printing layer is one of an epoxy resin adhesive layer, a polyurethane adhesive layer and an acrylic adhesive layer with a texture.

9. The PU electronic device back cover according to claim 1, characterized in that: The protective layer is one of acrylic resin, polyurethane, glass and acrylic.

10. A mobile phone, characterized in that: It comprises the PU electronic device back cover as described in any one of claims 1 to 9, as well as a mobile phone mid-plate, a circuit board, and a display screen; the circuit board and the display screen are arranged on the mobile phone mid-plate, and the PU electronic device back cover is buckled on the mobile phone mid-plate.

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