Shell, battery cover and electronic equipment

Abstract

The utility model relates to a shell, a battery cover and electronic equipment, the shell comprises a base body layer, the base body layer comprises a first surface layer, a first transition layer, a middle layer, a second transition layer and a second surface layer which are stacked in sequence; the first surface layer and the second surface layer are glass fiber reinforced resin layers; the first transition layer and the second transition layer are organic fiber reinforced resin layers; and the middle layer is a ceramic fiber reinforced resin layer. The shell disclosed by the utility model combines the advantages of high rigidity of the ceramic fibers and good toughness of the organic fibers, the strength of the matrix layer is improved while the thickness of the matrix layer is thinned, so that the thickness of the battery cover is thinned, and the strength of the battery cover is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic devices, and more particularly, to a housing, a battery cover and an electronic device. Background Art

[0002] Thinness has always been the pursuit of users and mobile phone manufacturers, especially for folding phones. The trend of folding phones is to be thinner and thinner. When the thinness of the whole mobile phone is disassembled to the material process, one of the requirements is the extreme thinness of the battery cover. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a housing, a battery cover and a housing of an electronic device.

[0004] To achieve the above object, in a first aspect of the present disclosure, a housing is provided, including a base layer, and the base layer includes a first surface layer, a first transition layer, an intermediate layer, a second transition layer and a second surface layer which are sequentially stacked;

[0005] The first surface layer and the second surface layer are glass fiber reinforced resin layers; the first transition layer and the second transition layer are organic fiber reinforced resin layers; the intermediate layer is a ceramic fiber reinforced resin layer.

[0006] Optionally, the thickness of the base layer is 0.25 - 0.35 mm.

[0007] Optionally, the first surface layer and the second surface layer have the same thickness and the same material, and the first transition layer and the second transition layer have the same thickness and the same material.

[0008] Optionally, the organic fiber reinforced resin layer includes one or more organic fiber sub-layers, and the thickness of each organic fiber sub-layer is 0.03 - 0.1 mm; the fiber gram weight of the organic fiber sub-layer is 20 - 80 g / m 2 .

[0009] Optionally, the organic fiber sub-layer is a unidirectional organic fiber cloth, and the arrangement directions of the organic fibers in each organic fiber sub-layer are parallel.

[0010] Optionally, the ceramic fiber reinforced resin layer includes one or more ceramic fiber sub-layers, and the thickness of each ceramic fiber sub-layer is 0.05 - 0.1 mm; the fiber gram weight of the ceramic fiber sub-layer is 100 - 500 g / m 2 .

[0011] Optionally, the ceramic fiber sub-layer is a unidirectional ceramic fiber cloth, and the arrangement directions of the ceramic fibers in each ceramic fiber sub-layer are parallel.

[0012] Optionally, the fiber extension direction in the organic fiber reinforced resin layer is perpendicular to the fiber extension direction in the ceramic fiber reinforced resin layer.

[0013] Optionally, the glass fiber reinforced resin layer includes one or more glass fiber sub-layers, and the thickness of each glass fiber sub-layer is 0.03 - 0.08 mm.

[0014] Optionally, the housing further includes a decorative layer disposed on the surface of the base layer.

[0015] Optionally, the decorative layer is an ink layer, and the thickness of the ink layer is 0.04 - 0.1 mm.

[0016] Optionally, the decorative layer includes an adhesive layer and a leather layer, the adhesive layer is disposed between the leather layer and the base layer; the thickness of the adhesive layer is 0.03 - 0.1 mm, and the thickness of the leather layer is 0.2 - 0.4 mm.

[0017] The second aspect of the present disclosure provides a battery cover, including the housing described in the first aspect of the present disclosure.

[0018] Optionally, the fiber extension direction in the organic fiber reinforced resin layer is parallel to the first pair of opposite sides of the battery cover, and the fiber extension direction in the ceramic fiber reinforced resin layer is parallel to the second pair of opposite sides of the battery cover.

[0019] The third aspect of the present disclosure provides an electronic device, including the battery cover described in the second aspect of the present disclosure.

[0020] Through the above technical solutions, the base layer of the housing provided by the present disclosure includes a first surface layer, a first transition layer, an intermediate layer, a second transition layer, and a second surface layer which are sequentially stacked; the first surface layer and the second surface layer are glass fiber reinforced resin layers, the first transition layer and the second transition layer are organic fiber reinforced resin layers, and the intermediate layer is a ceramic fiber reinforced resin layer. The housing of the present disclosure combines the advantages of strong rigidity of ceramic fibers and good toughness of organic fibers, while thinning the thickness of the base layer, improving the strength of the base layer, further thinning the thickness of the battery cover, and improving the strength of the battery cover.

[0021] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. Description of the Drawings

[0022] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of the housing in Embodiment 1 of the present disclosure.

[0024] Figure 2 It is a schematic diagram of the housing structure of Embodiment 2 of the present disclosure.

[0025] Figure 3 It is a comparison chart of the results of the three-rod bending test.

[0026] Explanation of the reference numerals

[0027] 1-1: First surface layer; 2-1: First transition layer; 3: Intermediate layer; 2-2: Second transition layer; 1-2: Second surface layer; 4: Substrate layer; 5: Ink layer; 6: Adhesive layer; 7: Leather layer. Specific embodiments

[0028] The following will describe in detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0029] The first aspect of the present disclosure provides a housing, including a substrate layer, and the substrate layer includes a first surface layer, a first transition layer, an intermediate layer, a second transition layer, and a second surface layer that are sequentially stacked.

[0030] The first surface layer and the second surface layer are glass fiber reinforced resin layers; the first transition layer and the second transition layer are organic fiber reinforced resin layers; the intermediate layer is a ceramic fiber reinforced resin layer.

[0031] The substrate layer of the housing provided by the present disclosure includes a first surface layer, a first transition layer, an intermediate layer, a second transition layer, and a second surface layer that are sequentially stacked; the first surface layer and the second surface layer are glass fiber reinforced resin layers, the first transition layer and the second transition layer are organic fiber reinforced resin layers, and the intermediate layer is a ceramic fiber reinforced resin layer. The housing of the present disclosure combines the advantages of strong rigidity of ceramic fibers and good toughness of organic fibers, improves the strength of the substrate layer while thinning the thickness of the substrate layer, thereby thinning the thickness of the battery cover and improving the strength of the battery cover.

[0032] According to an embodiment of the present disclosure, the thickness of the substrate layer is 0.25 to 0.35 mm. The substrate layer of the present disclosure has a relatively thin thickness.

[0033] According to an embodiment of the present disclosure, the first surface layer and the second surface layer have the same thickness and the same material, and the first transition layer and the second transition layer have the same thickness and the same material. In the present disclosure, having the same thickness and the same material means that the materials, thicknesses, fiber extension directions, sub-layer materials, thicknesses, sub-layer numbers, and fiber extension directions of the first surface layer and the second surface layer are all the same, and the materials, thicknesses, fiber extension directions, sub-layer materials, thicknesses, sub-layer numbers, and fiber extension directions of the first transition layer and the second transition layer are all the same. The above embodiment is beneficial to making the matrix layer have a lower thickness while maintaining better strength.

[0034] According to an embodiment of the present disclosure, the organic fiber reinforced resin layer includes one or more organic fiber sub-layers, and the thickness of each organic fiber sub-layer is 0.03 - 0.1 mm.

[0035] According to an embodiment of the present disclosure, the organic fiber sub-layer includes a first resin matrix and organic fiber reinforcements distributed in the first resin matrix, and the fiber weight per unit area of the organic fiber sub-layer is 20 - 80 g / m 2 , and the weight percentage of the first resin matrix is 20 - 50%. The preparation method of the organic fiber reinforcements can be conventional technical means in the art and will not be elaborated here.

[0036] According to an embodiment of the present disclosure, the first resin matrix is an epoxy resin, and the organic fiber reinforcements can be selected from one or more of aramid fibers, polyethylene fibers, poly(p-phenylene benzobisoxazole) fibers (PBO), and polyimide fibers (PI).

[0037] According to an embodiment of the present disclosure, the organic fiber reinforcements in the organic fiber sub-layer are unidirectional organic fiber cloths, and the arrangement directions of the organic fibers in each organic fiber sub-layer are parallel. The above embodiment is beneficial to the matrix layer having better toughness.

[0038] According to an embodiment of the present disclosure, the ceramic fiber reinforced resin layer includes one or more ceramic fiber sub-layers, and the thickness of each ceramic fiber sub-layer is 0.05 - 0.1 mm.

[0039] According to an embodiment of the present disclosure, the ceramic fiber sub-layer includes a second resin matrix and ceramic fiber reinforcements distributed in the second resin matrix, and the fiber weight per unit area of the ceramic fiber sub-layer is 100 - 500 g / m 2 , and the weight percentage of the second resin matrix is 15 - 40%. The preparation method of the ceramic fiber reinforcements is conventional technical means in the art and will not be elaborated here.

[0040] According to an embodiment of the present disclosure, the ceramic fiber reinforcement in the ceramic fiber sublayer is a unidirectional ceramic fiber cloth, and the arrangement directions of the ceramic fibers in each of the ceramic fiber sublayers are parallel. The above embodiment is beneficial for the matrix layer to have better rigidity.

[0041] According to an embodiment of the present disclosure, the second resin matrix is an epoxy resin, and the ceramic fiber reinforcement can be selected from one or more of Al2O3 fibers, B2O3 fibers, SiO2 fibers, and SiC fibers.

[0042] According to an embodiment of the present disclosure, the fiber extension direction in the organic fiber reinforced resin layer is perpendicular to the fiber extension direction in the ceramic fiber reinforced resin layer. The above embodiment is beneficial for enhancing the strength of the matrix layer.

[0043] According to an embodiment of the present disclosure, the glass fiber reinforced resin layer includes one or more glass fiber sublayers, and the thickness of each glass fiber sublayer is 0.03 - 0.08 mm. The glass fiber reinforced resin layer of the present disclosure can be a conventional technical means in the art. The glass fiber reinforced resin layer includes a third resin matrix and glass fiber reinforcements distributed in the third resin matrix. The third resin matrix can be an epoxy resin, and the weight percentage of the epoxy resin is 40 - 55%, and the fiber gram weight of the glass fiber sublayer is 30 - 50 g / m 2 , for example, the glass fiber sublayer can be electronic cloth 1080 and electronic cloth 1067. The above embodiment can play a shielding role for the first transition layer and the second transition layer, and at the same time is beneficial for further processing on the matrix layer, making the appearance of the shell part more beautiful.

[0044] According to an embodiment of the present disclosure, the shell further includes a decorative layer provided on the surface of the matrix layer. The above embodiment is beneficial for the shell part to have better aesthetics.

[0045] According to an embodiment of the present disclosure, the decorative layer is an ink layer, and the thickness of the ink layer is 0.04 - 0.1 mm. In a further embodiment, the ink layer includes 3 - 7 ink sublayers, and the ink layer can be prepared by spraying and stamping methods, and the inks used can be conventional thermosetting inks and UV curable inks in the art. The above embodiment is beneficial for the shell part to have better aesthetics.

[0046] According to an embodiment of the present disclosure, the decorative layer includes an adhesive layer and a leather layer, and the adhesive layer is provided between the leather layer and the matrix layer; the thickness of the adhesive layer is 0.03 - 0.1 mm, and the thickness of the leather layer is 0.2 - 0.4 mm. The above embodiment is beneficial for the shell part to have better aesthetics.

[0047] According to an embodiment of the present disclosure, the method for preparing the housing of the present disclosure can be a conventional technical means in the art, including laminating, molding, first cutting, spray printing or leather bonding, and second cutting; the first cutting and the second cutting of the present disclosure can be laser cutting. The molding conditions of the housing include: the molding temperature can be 150-200°C, and the molding pressure can be 0.5-200 MPa.

[0048] In a second aspect of the present disclosure, a battery cover is provided, including the housing described in the first aspect of the present disclosure.

[0049] According to an embodiment of the present disclosure, the fiber extension direction in the organic fiber reinforced resin layer is parallel to the first set of opposite sides of the battery cover, and the fiber extension direction in the ceramic fiber reinforced resin layer is parallel to the second set of opposite sides of the battery cover. The above embodiment is beneficial to enhancing the strength of the matrix layer.

[0050] In a third aspect of the present disclosure, an electronic device is provided, including the battery cover described in the second aspect of the present disclosure.

[0051] In a specific implementation method, the electronic device includes mobile phones, tablet computers, etc.

[0052] The present disclosure will be further described below through examples, but the present disclosure is not limited thereby.

[0053] Example 1

[0054] As Figure 1 shown, the battery cover of Example 1 includes a housing, and the housing includes a matrix layer 4 and an ink layer 5 provided on the surface of the matrix layer; the matrix layer includes a first surface layer 1-1, a first transition layer 2-1, an intermediate layer 3, a second transition layer 2-2, and a second surface layer 1-2 that are sequentially laminated;

[0055] The first surface layer 1-1 is a glass fiber reinforced resin layer, including a glass fiber sub-layer with a thickness of 0.03 mm, 0.05 mm or 0.08 mm; the fiber gram weight is 35 g / m 2 40 g / m 2 or 45 g / m 2 , and the weight ratio of epoxy resin is 40%, 45% or 50%;

[0056] The first transition layer 2-1 is an organic fiber reinforced resin layer, including an organic fiber sub-layer with a thickness of 0.05 mm, 0.06 mm or 0.1 mm. The organic fiber sub-layer includes epoxy resin and poly(p-phenylene benzobisoxazole) (PBO) fibers distributed in the epoxy resin. The fiber gram weight is 25 g / m 2 , 30 g / m 2 or 35 g / m 2, the weight percentage of the epoxy resin is 35%, 40% or 45%;

[0057] The intermediate layer 3 is a ceramic fiber reinforced resin layer, including a ceramic fiber sub-layer with a thickness of 0.05 mm, 0.08 mm or 0.1 mm. The ceramic fiber sub-layer includes epoxy resin and Al2O3 fibers distributed in the epoxy resin, and the fiber gram weight is 190 g / m 2 , 200 g / m 2 or 210 g / m 2 , the weight percentage of the epoxy resin is 15%, 20% or 25%, and the fiber extension direction in the ceramic fiber sub-layer is perpendicular to the fiber extension direction in the organic fiber sub-layer;

[0058] The first transition layer 2-1 and the second transition layer 2-2 are the same, and the thickness, material, number of sub-layers, thickness of sub-layers, and fiber arrangement direction of the two layers are the same;

[0059] The first surface layer 1-1 and the second surface layer 1-2 are the same, and the thickness, material, number of sub-layers, thickness of sub-layers, and fiber arrangement direction of the two layers are the same;

[0060] The thickness of the ink layer is 0.05 mm, 0.06 mm or 0.08 mm;

[0061] The thickness of the battery cover is 0.26 mm, 0.35 mm or 0.37 mm. In the battery cover, the organic fibers of the organic fiber reinforced resin layer are arranged parallel to the short axis of the battery cover, and the fiber arrangement is 0°; the ceramic fibers of the ceramic fiber reinforced resin layer are arranged parallel to the long axis of the battery cover, and the fiber arrangement is 90°; the extension direction of the organic fibers in the organic fiber reinforced resin layer is perpendicular to the extension direction of the ceramic fibers in the ceramic fiber reinforced resin layer;

[0062] The preparation method of Example 1 includes: laminating, molding, first cutting, spraying and printing the ink layer 5, and second cutting the first surface layer 1-1, the first transition layer 2-1, the intermediate layer 3, the second transition layer 2-2 and the second surface layer 1-2 in sequence; the first cutting and the second cutting are laser cutting; the molding temperature can be 160 °C, 170 °C, 180 °C or 190 °C, and the molding pressure can be 90 MPa, 100 MPa, 110 MPa or 120 MPa.

[0063] Example 2

[0064] As Figure 2 shown, the battery cover of this Example 2 includes a housing, and the housing includes a base layer 4 and an adhesive layer 6 and a leather layer 7 provided on the surface of the base layer 4; the base layer includes a first surface layer 1-1, a first transition layer 2-1, an intermediate layer 3, a second transition layer 2-2 and a second surface layer 1-2 which are sequentially laminated;

[0065] The first surface layer 1-1 is a glass fiber reinforced resin layer, including a glass fiber sub-layer with a thickness of 0.03 mm, 0.05 mm or 0.08 mm; the fiber grammage is 35 g / m 2 、40 g / m 2 or 45 g / m 2 , and the weight percentage of epoxy resin is 40%, 45% or 50%;

[0066] The first transition layer 2-1 is an organic fiber reinforced resin layer, including an organic fiber sub-layer with a thickness of 0.05 mm, 0.06 mm or 0.1 mm. The organic fiber sub-layer includes epoxy resin and poly(p-phenylene benzobisoxazole) (PBO) fibers distributed in the epoxy resin. The fiber grammage is 25 g / m 2 、30 g / m 2 or 35 g / m 2 , and the weight percentage of epoxy resin is 35%, 40% or 45%;

[0067] The middle layer 3 is a ceramic fiber reinforced resin layer, including a ceramic fiber sub-layer with a thickness of 0.05 mm, 0.08 mm or 0.1 mm. The ceramic fiber sub-layer includes epoxy resin and Al2O3 fibers distributed in the epoxy resin. The fiber grammage is 190 g / m 2 、200 g / m 2 or 210 g / m 2 , and the weight percentage of epoxy resin is 15%, 20% or 25%. The fiber extension direction in the ceramic fiber sub-layer is perpendicular to the fiber extension direction in the organic fiber sub-layer;

[0068] The first transition layer 2-1 and the second transition layer 2-2 are symmetrically arranged, and the two layers have the same thickness, material, number of sub-layers, thickness of sub-layers and fiber extension direction;

[0069] The first surface layer 1-1 and the second surface layer 1-2 are symmetrically arranged, and the two layers have the same thickness, material, number of sub-layers, thickness of sub-layers and fiber extension direction;

[0070] The thickness of the adhesive layer is 0.05 mm or 0.1 mm, and the thickness of the leather layer is 0.25 mm or 0.3 mm;

[0071] The thickness of the battery cover is 0.6 mm, 0.66 mm or 0.7 mm;

[0072] The preparation method of this Example 2 includes: laminating the first surface layer 1-1, the first transition layer 2-1, the intermediate layer 3, the second transition layer 2-2, and the second surface layer 1-2 in sequence, pressing, first cutting, preparing an adhesive layer 6 on the surface of the second surface layer 1-2 by hot melt adhesive and laminating a leather layer 7, and second cutting; the first cutting and the second cutting are laser cuttings; the temperature of the pressing and forming can be 160°C, 170°C, 180°C or 190°C, and the pressure of the pressing and forming can be 90 MPa, 100 MPa, 110 MPa or 120 MPa.

[0073] Comparative Example 1

[0074] The battery cover of this Comparative Example 1 includes a matrix layer and an ink layer provided on the surface of the matrix layer. The ink layer is the same as that in Example 1. The matrix layer is a glass fiber reinforced resin layer. The glass fiber reinforced resin layer includes 4 glass fiber sub-layers, and the thickness of each glass fiber sub-layer is 0.1 mm; the glass fiber uses the 2116 specification of electronic cloth, and the fiber gram weight is 100 g / m 2 , the weight ratio of epoxy resin is 50%, and the preparation method uses pressing, CNC, spraying, and CNC. CNC is computer numerical control precision machining; the conditions of pressing are the same as those in Example 1. CNC is a conventional technical means in the art. The thickness of the ink layer is 0.05 mm, and the thickness of the battery cover is 0.45 mm.

[0075] Comparative Example 2

[0076] The battery cover of this Comparative Example 2 includes a housing, and the housing includes a matrix layer 4 and an ink layer 5 provided on the surface of the matrix layer; the matrix layer includes a first surface layer 1-1, an intermediate layer 3, a second transition layer 2-2, and a second surface layer 1-2 that are sequentially laminated.

[0077] The first surface layer 1-1 is a glass fiber reinforced resin layer, including one glass fiber sub-layer with a thickness of 0.05 mm; the glass fiber sub-layer uses the 1080 specification of electronic cloth, and the fiber gram weight is 40 g / m 2 , the weight ratio of epoxy resin is 45%;

[0078] The second surface layer 1-2 is a glass fiber reinforced resin layer, including one glass fiber sub-layer with a thickness of 0.05 mm; the glass fiber sub-layer uses the 1080 specification of electronic cloth, and the fiber gram weight is 40 g / m 2 , the weight ratio of epoxy resin is 45%;

[0079] The second transition layer 2-2 is an organic fiber reinforced resin layer, including one organic fiber sub-layer with a thickness of 0.05 mm. The organic fiber sub-layer includes epoxy resin and poly(p-phenylene benzobisoxazole) (PBO) fibers distributed in the epoxy resin, and the fiber gram weight is 30 g / m 2 , the weight ratio of epoxy resin is 40%;

[0080] The middle layer 3 is a ceramic fiber reinforced resin layer, including a ceramic fiber sub-layer with a thickness of 0.1 mm. The ceramic fiber sub-layer includes epoxy resin and Al2O3 fibers distributed in the epoxy resin, and the fiber grammage is 200 g / m 2 , the weight ratio of the epoxy resin is 20%, and the fiber extension direction in the ceramic fiber sub-layer is perpendicular to the fiber extension direction in the organic fiber sub-layer; the thickness of the ink layer is 0.05 mm; the thickness of the battery cover is 0.3 mm.

[0081] Test Example 1

[0082] The battery covers with the same length and width prepared in Examples 1-2 and Comparative Examples 1-2 were subjected to a three-rod bending strength test, and the results are shown in Table 1 below and Figure 3 as shown.

[0083] The test method includes: using a pull-out force tester, adjusting the axes of the two support rods to be 5 mm away from the outer edge of the structural member respectively (span = structural member length - 10 mm). If there are structural protrusions at the 5 mm position, appropriate avoidance is required; adjusting the pressure rod to align with the center line position of the structure, and performing compression at a speed of 5 mm / min until the specified load, maintaining for 5 s, and recording the pressure-displacement curve; the support rods and the pressure rod are made of steel with a diameter of 6 mm.

[0084] Table 1

[0085]

[0086] According to the data in Table 1, when the process of the exterior layer of the battery cover is the same, the housing of the present disclosure can be used for the battery cover, enabling the battery cover to have better strength while being thinner in thickness.

[0087] In Example 1 and Comparative Example 1, the exterior layer is an ink layer. Compared with Comparative Example 1, the thickness of the battery cover in Example 1 is lower than that in Comparative Example 1, the maximum load that can be borne is higher than that in Comparative Example 1, and the displacement occurring under the same load is smaller, indicating that the battery cover in Example 1 has better strength.

[0088] Compared with Comparative Example 2, the matrix layer in Example 1 includes a first surface layer, a first transition layer, a middle layer, a second transition layer, and a second surface layer. The first transition layer and the second transition layer are organic fiber reinforced resin layers. The maximum load that the battery cover in Example 1 can bear is higher than that in Comparative Example 1, and the displacement occurring under the same load is smaller, indicating that the battery cover in Example 1 has better strength.

[0089] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0090] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0091] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A housing, characterized in that, It includes a matrix layer, and the matrix layer includes a first surface layer, a first transition layer, an intermediate layer, a second transition layer, and a second surface layer that are sequentially stacked; The first surface layer and the second surface layer are glass fiber reinforced resin layers; the first transition layer and the second transition layer are organic fiber reinforced resin layers; The intermediate layer is a ceramic fiber reinforced resin layer.

2. The housing according to claim 1, characterized in that, The thickness of the matrix layer is 0.25 - 0.35 mm.

3. The housing according to claim 1, characterized in that, The first surface layer and the second surface layer have the same thickness and the same material, and the first transition layer and the second transition layer have the same thickness and the same material.

4. The housing according to claim 1, characterized in that, The organic fiber reinforced resin layer includes one or more organic fiber sub - layers, and the thickness of each organic fiber sub - layer is 0.03 - 0.1 mm; The fiber grammage of the organic fiber sublayer is 20 to 80 g / m 2 .

5. The housing according to claim 4, characterized in that, The organic fiber sub - layer is a unidirectional organic fiber cloth, and the arrangement directions of the organic fibers in each organic fiber sub - layer are parallel.

6. The housing according to claim 1, characterized in that The ceramic fiber reinforced resin layer includes one or more ceramic fiber sub - layers, and the thickness of each ceramic fiber sub - layer is 0.05 - 0.1 mm; The fiber weight of the ceramic fiber sublayer is 100 to 500 g / m 2 .

7. The housing according to claim 6, characterized in that, The ceramic fiber sub - layer is a unidirectional ceramic fiber cloth, and the arrangement directions of the ceramic fibers in each ceramic fiber sub - layer are parallel.

8. The housing according to claim 1, characterized in that, The fiber extension direction in the organic fiber reinforced resin layer is perpendicular to the fiber extension direction in the ceramic fiber reinforced resin layer.

9. The housing according to claim 1, characterized in that, The glass fiber reinforced resin layer includes one or more glass fiber sub - layers, and the thickness of each glass fiber sub - layer is 0.03 - 0.08 mm.

10. The housing according to any one of claims 1 to 9, characterized in that, The housing further includes a decorative layer provided on the surface of the matrix layer.

11. The housing according to claim 10, wherein The decorative layer is an ink layer, and the thickness of the ink layer is 0.04 - 0.1 mm.

12. The housing according to claim 10, characterized in that, The decorative layer includes an adhesive layer and a leather layer, and the adhesive layer is provided between the leather layer and the matrix layer; the thickness of the adhesive layer is 0.03 - 0.1 mm, and the thickness of the leather layer is 0.2 - 0.4 mm.

13. A battery cover, characterized in that, It includes the housing according to any one of claims 1 - 12.

14. The battery cover according to claim 13, characterized in that, The fiber extension direction in the organic fiber reinforced resin layer is parallel to the first pair of opposite sides of the battery cover, and the fiber extension direction in the ceramic fiber reinforced resin layer is parallel to the second pair of opposite sides of the battery cover.

15. An electronic device, characterized in that, It includes the battery cover according to any one of claims 13 - 14.

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