Improved mobile phone rear cover

Abstract

The utility model relates to the technical field of mobile phone accessories, in particular to an improved mobile phone rear cover. The improved mobile phone rear cover comprises a mobile phone shell, and the mobile phone shell comprises a base layer, an aluminum reflecting film, a plurality of color matching layers, a three-dimensional logo layer and a protective layer which are sequentially arranged from inside to outside. The thickness of the aluminum reflecting film is between 1nm and 8nm; the color matching layer comprises a plurality of first TiO2 layers and first SiO2 layers which are arranged at intervals, and the first TiO2 layers and the first SiO2 layers are different in thickness; wherein the thickness of the first TiO2 layer ranges from 8 nm to 70 nm, and the thickness of the first SiO2 layer ranges from 70 nm to 90 nm; the three-dimensional logo layer is sprayed on the outermost first SiO2 layer; the protection layer is arranged on the first SiO2 layer on the outermost layer and packages the three-dimensional logo layer. And the aluminum-plated reflecting film on the base layer has reflecting and heat-conducting properties, so that heat in the mobile phone can be quickly transferred out of the mobile phone shell.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone accessories, in particular to an improved mobile phone back cover. Background Art

[0002] The mobile phone back cover occupies a large part of the area of the mobile phone. Therefore, the aesthetic degree of the mobile phone back cover will directly affect the purchasing desire of the purchaser. In order to make the mobile phone present colors, some mobile phone back covers on the market are made by multi-layer coating process, which can produce a variety of colors. However, some coatings affect the heat dissipation performance of the mobile phone back cover while pursuing colors, and are not conducive to the mobile phone back cover to dissipate heat to the outside.

[0003] For example, a 3D cover plate for reducing the color difference at the edge of the coating disclosed in the Chinese patent application number: CN202023239678.5. Its first layer is a ZRO2 layer (zirconia), and the ZRO2 has a low thermal conductivity. It is difficult for the heat inside the mobile phone to dissipate from the mobile phone back cover, affecting the heat dissipation performance of the mobile phone.

[0004] In addition, some mobile phone back covers form logos by printing or spraying. Such logos lack three-dimensional sense. For example, the mobile phone back cover with two-color positive lines disclosed in CN202223315192.4 forms the logo by spraying or printing, and the three-dimensional sense of this kind of logo is poor. Content of the Utility Model

[0005] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide an improved mobile phone back cover, which not only helps to improve the heat dissipation performance of the mobile phone back cover, but also the logo has a three-dimensional sense, thus overcoming the deficiencies of the existing technology.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] The present application provides an improved mobile phone back cover, including a mobile phone case, and the mobile phone case includes a base layer, an aluminum reflective film, several layers of color adjustment layers, a three-dimensional logo layer, and a protective layer arranged in sequence from inside to outside; the thickness of the aluminum reflective film is between 1-8 nm; the color adjustment layer includes several layers of alternately arranged first TiO2 layers and first SiO2 layers, and the thicknesses of the first TiO2 layer and the first SiO2 layer are not the same; among them, the thickness of the first TiO2 layer is between 8-70 nm, and the thickness of the first SiO2 layer is between 70-90 nm; the three-dimensional logo layer is sprayed on the outermost first SiO2 layer; the protective layer is arranged on the outermost first SiO2 layer and encapsulates the three-dimensional logo layer.

[0008] Preferably, the base layer is one of plastic, epoxy glass fiber, and carbon fiber.

[0009] Preferably, a rough surface is provided on the base layer, and the aluminum reflective film is plated on the rough surface.

[0010] Preferably, the color adjustment layer has a total of six layers, with three layers each of the first TiO2 layer and the first SiO2 layer; among them, the first layer is the first TiO2 layer with a thickness of 8 nm; the second layer is the first SiO2 layer with a thickness of 85 nm; the third layer is the first TiO2 layer with a thickness of 74 nm; the fourth layer is the first SiO2 layer with a thickness of 67 nm; the fifth layer is the first TiO2 layer with a thickness of 62 nm, and the sixth layer is the first SiO2 layer with a thickness of 96 nm.

[0011] Preferably, a second SiO2 layer is further sandwiched between the aluminum reflective film and the base layer, and the thickness of the second SiO2 layer is 10 nm.

[0012] Preferably, the three-dimensional logo layer is a three-dimensional logo formed by the solidification of magnetic ink.

[0013] Preferably, the protective layer is a SiO2 layer with a thickness of 24 nm.

[0014] Preferably, the mobile phone case is formed with a back plate, a left frame, a right frame, an upper frame, and a lower frame; a camera hole penetrates through the back plate; a volume key hole is provided on the left frame; a power key hole is provided on the right frame, and a charging hole and a sound outlet hole are provided on the lower frame.

[0015] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, plating an aluminum reflective film on the base layer plays a role in reflection. The aluminum reflective film has good heat conduction performance, which is beneficial to quickly transfer the heat inside the mobile phone out of the mobile phone case.

[0016] The three-dimensional logo layer is made of magnetic ink. After applying a magnetic field to the magnetic ink and then curing it, the three-dimensional logo layer will have a three-dimensional effect, which is more cool and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 is a schematic diagram of the mobile phone case of an embodiment of the present utility model.

[0019] Figure 3 is a rear view schematic diagram of the mobile phone case of an embodiment of the present utility model.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0021] 10. Mobile phone case; 11. Back panel; 12. Left side frame; 13. Right side frame; 14. Upper side frame; 15. Lower side frame; 16. Camera hole; 17. Power button hole; 18. Charging hole; 19. Sound outlet hole; 110. Volume button hole; 20. Base layer; 21. Second SiO2 layer; 22. Aluminum reflective film; 23. Three-dimensional logo layer; 24. Protective layer; 30. Color adjustment layer; 31. First TiO2 layer; 32. First SiO2 layer. Detailed implementation manner

[0022] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended utility model purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, detail the specific implementation manner, structure, features, and their effects of the present invention as follows.

[0023] Please refer to Figures 1 to 3 as shown, which shows the specific structure of the preferred embodiment of the present invention, and is an improved mobile phone back cover.

[0024] Among them, the aluminum reflective film 22 has a very good reflection effect, and at the same time, the aluminum reflective film 22 also has a very good heat conduction performance, and heat can be quickly transferred from the inside of the mobile phone to the air through the mobile phone case 10 for heat dissipation. The three-dimensional logo layer 23 is made of magnetic ink, and it has a very good three-dimensional effect after curing.

[0025] The present application provides an improved mobile phone back cover, including a mobile phone case 10, which includes a base layer 20, an aluminum reflective film 22, several layers of color adjustment layers 30, a three-dimensional logo layer 23, and a protective layer 24 arranged in sequence from inside to outside; the thickness of the aluminum reflective film 22 is between 1-8 nm; the color adjustment layer 30 includes several layers of alternately arranged first TiO2 layers 31 and first SiO2 layers 32, and the thicknesses of the first TiO2 layer 31 and the first SiO2 layer 32 are different; among them, the thickness of the first TiO2 layer 31 is between 8-70 nm, and the thickness of the first SiO2 layer 32 is between 70-90 nm; the three-dimensional logo layer 23 is sprayed on the outermost first SiO2 layer 32; the protective layer 24 is arranged on the outermost first SiO2 layer 32 and encapsulates the three-dimensional logo layer 23. The aluminum reflective film 22 is preferably coated on the base layer 20 by a (direct plating method / direct evaporation plating method / transfer method) coating process. The aluminum reflective film 22 has the functions of heat conduction and reflection. The thickness of the aluminum reflective film 22 can be any value among 2, 4, 6, and 8 nm. The color adjustment layer 30 is formed by alternately plating several layers of first TiO2 layers 31 and first SiO2 layers 32 with different thicknesses, so that the color adjustment layer 30 can produce different gradient colors. The first TiO2 layer 31 can be set by vacuum coating or spraying process. Among them, the first TiO2 layer 31 is preferably coated by any one of the sol-gel method, thermal oxidation method, ion beam sputtering method, and magnetron sputtering method. The protective layer 24 is SiO2 (silicon dioxide). TiO2 (titanium dioxide). SiO2 is preferably vacuum coated, and the process flow of vacuum coating silicon dioxide is as follows: evaporate the material on the surface of the object to make the product applicable to the surface of optical glass and other metals and plastic objects. The three-dimensional logo layer 23 is a three-dimensional logo formed by the solidification of magnetic ink, and has a good 3D effect after solidification, which is more beautiful. The three-dimensional logo layer 23 is sprayed on the outermost first SiO2 layer 32, and then a magnetic field is applied. After the three-dimensional logo layer 23 solidifies, it has a 3D effect. Among them, the values of each layer are adjustable, and the coating data are adjusted in the coating equipment. The magnetic ink is acrylic resin magnetic ink, and the epoxy magnetic ink can be quickly cured by a uv lamp, which is beneficial to improving the production efficiency. After the three-dimensional logo layer 23 solidifies, the protective layer 24 encapsulates the three-dimensional logo layer 23 in the color adjustment layer 30. Preferred production steps: 1. First, the mobile phone case 10 is formed by a mold, and then the mobile phone case 10 is put into a cnc equipment for fine processing. 2. Coat the aluminum reflective film 22. 3. Coat the color adjustment layer 30. 4. Spray the three-dimensional logo layer 23. 5. Coat the protective layer 24.

[0026] Preferably, the base layer 20 is one of plastic, epoxy glass fiber, and carbon fiber. A rough surface is provided on the base layer 20, and the aluminum reflective film 22 is plated on the rough surface. In this embodiment, the base layer 20 is plastic. The rough surface enhances the bonding strength between the aluminum reflective film 22 and the base layer 20.

[0027] Preferably, there are a total of six layers in the color adjustment layer 30, with three layers each of the first TiO2 layer 31 and the first SiO2 layer 32; among them, the first layer is the first TiO2 layer 31 with a thickness of 8 nm; the second layer is the first SiO2 layer 32 with a thickness of 85 nm; the third layer is the first TiO2 layer 31 with a thickness of 74 nm; the fourth layer is the first SiO2 layer 32 with a thickness of 67 nm; the fifth layer is the first TiO2 layer 31 with a thickness of 62 nm, and the sixth layer is the first SiO2 layer 32 with a thickness of 96 nm. As a preferred solution: the thickness is 10.00 nm; the first layer (42) is the first TiO2 layer 31 with a thickness of 7.82 nm; the second layer is the first SiO2 layer 32 with a thickness of 80 nm; the third layer is the first TiO2 layer 31 with a thickness of 72.32 nm; the fourth layer (45) is the first SiO2 layer 32 with a thickness of 65.00 nm; the fifth layer is the first TiO2 layer 31 with a thickness of 60.00 nm; the sixth layer (47) is the first SiO2 layer 32 with a thickness of 94.77 nm; the protective layer 24 is SiO2 with a thickness of 23.51 nm.

[0028] Preferably, a second SiO2 layer 21 is further sandwiched between the aluminum reflective film 22 and the base layer 20, and the thickness of the second SiO2 layer 21 is 10 nm. The second SiO2 layer 21 has the functions of transmitting light and refracting light, improving the uniformity and brightness of light.

[0029] Preferably, the protective layer 24 is a SiO2 layer with a thickness of 24 nm. In addition, the thickness of the protective layer 24 can also be 23.51 nm. The protective layer 24 can also be a glue such as acrylic resin that can be cured by uv. The protective layer 24 has hardness and plays a role in protection and scratch prevention.

[0030] Preferably, the mobile phone case 10 is formed with a back plate 11, a left frame 12, a right frame 13, an upper frame 14, and a lower frame 15; a camera hole 17 penetrates through the back plate 11; a volume key hole 110 is provided on the left frame 12; a power key hole 17 is provided on the right frame 13, and a charging hole 18 and a sound outlet hole 19 are provided on the lower frame 15.

[0031] In summary, the design focus of the present utility model lies in that its aluminum reflective film 22 has a reflective effect and a heat conduction effect, and heat can be quickly transferred from the inside of the mobile phone through the mobile phone case 10 to the air for heat dissipation, ensuring the heat dissipation efficiency. At the same time, the three-dimensional logo layer 23 is made of magnetic ink and has a very good three-dimensional effect after curing in a magnetic field, making the logo more cool.

[0032] The above are only the preferred embodiments of the present utility model and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. An improved mobile phone back cover, characterized in that: The mobile phone case includes a base layer, an aluminum reflective film, a plurality of color adjustment layers, a three-dimensional logo layer, and a protective layer, which are arranged in sequence from the inside to the outside; the thickness of the aluminum reflective film is between 1 nm and 8 nm; The color adjustment layer includes a plurality of first TiO2 layers and first SiO2 layers alternately arranged, and the thicknesses of the first TiO2 layers and the first SiO2 layers are different; wherein the thickness of the first TiO2 layer is between 8-70 nm, and the thickness of the first SiO2 layer is between 70-90 nm; The three-dimensional logo layer is sprayed on the outermost first SiO2 layer; The protective layer is arranged on the outermost first SiO2 layer and encapsulates the three-dimensional logo layer.

2. The improved mobile phone back cover according to claim 1, characterized in that: The base layer is one of plastic, epoxy glass fiber and carbon fiber.

3. The improved mobile phone back cover according to claim 1, characterized in that: The base layer is provided with a rough surface, and the aluminum reflective film is plated on the rough surface.

4. The improved mobile phone back cover according to claim 1, characterized in that: The color adjustment layer has a total of six layers, with three first TiO2 layers and three first SiO2 layers respectively; among them, the first layer is the first TiO2 layer with a thickness of 8 nm; the second layer is the first SiO2 layer with a thickness of 85 nm; the third layer is the first TiO2 layer with a thickness of 74 nm; the fourth layer is the first SiO2 layer with a thickness of 67 nm; the fifth layer is the first TiO2 layer with a thickness of 62 nm, and the sixth layer is the first SiO2 layer with a thickness of 96 nm.

5. The improved mobile phone back cover according to claim 1, characterized in that: A second SiO2 layer is sandwiched between the aluminum reflective film and the base layer, and the thickness of the second SiO2 layer is 10 nm.

6. The improved mobile phone back cover according to claim 1, characterized in that: The three-dimensional logo layer is a three-dimensional logo formed by solidifying magnetic ink.

7. The improved mobile phone back cover according to claim 1, characterized in that: The protective layer is a SiO2 layer, and its thickness is 24 nm.

8. The improved mobile phone back cover according to claim 1, characterized in that: The mobile phone case is formed with a back plate, a left frame, a right frame, an upper frame, and a lower frame; the back plate is penetrated by a camera hole; the left frame is provided with a volume key hole; the right frame is provided with a power key hole, and the lower frame is provided with a charging hole and a sound outlet hole.

Images