Cover plate and electronic device

Abstract

The utility model discloses a cover plate and electronic equipment, cover plate is used for electronic equipment, and cover plate includes base layer, bonding layer and composite pattern layer, and base layer, bonding layer and composite pattern layer are set gradually, and composite pattern layer includes texture base layer, first plating and second plating, and one side of texture base layer is equipped with first texture surface, and the other side of texture base layer is equipped with second texture surface, and first plating is located on first texture surface, and second plating is located on second texture surface. Cover plate can have double -layer texture effect through the setting composite pattern layer, improve the appearance of cover plate aesthetic property, also have the advantage that the thickness size is small, and cover plate is connected through the setting bonding layer composite pattern layer and base layer, and the connecting strength is big and can steady support composite pattern layer, makes cover plate have portability and aesthetic property under the condition of guaranteeing the structure strength of cover plate.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment technology, specifically relating to a cover plate and an electronic device. Background Technology

[0002] Currently, as electronic devices are trending towards thinner and lighter designs, users are increasingly demanding greater portability, aesthetics, and comfortable grip. Taking smartphones as an example, the back cover needs to possess high strength and high light transmittance, while also showcasing attractive textures, patterns, and light and shadow effects. However, some existing back covers only feature a single optical texture, resulting in a monotonous decorative effect and poor aesthetics. Others, while featuring a double-layer texture design, significantly increase the cover's thickness, reducing portability. Furthermore, increased cover thickness leads to greater light scattering loss, affecting light transmittance and visual appeal. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, this utility model provides a cover plate and an electronic device, aiming to solve the technical problem that existing cover plates cannot simultaneously achieve portability and aesthetics.

[0004] To achieve the above objectives, this utility model provides a cover plate for use in electronic devices, the cover plate comprising: basal layer; Adhesive layer; The composite pattern layer, the base layer, the adhesive layer and the composite pattern layer are arranged in sequence. The composite pattern layer includes a textured base layer, a first plating layer and a second plating layer. A first textured surface is provided on one side of the textured base layer and a second textured surface is provided on the other side of the textured base layer. The first plating layer is provided on the first textured surface and the second plating layer is provided on the second textured surface.

[0005] In this embodiment of the invention, the sum of the thicknesses of the adhesive layer, the textured base layer, the first coating layer, and the second coating layer is 20.02 μm to 46 μm.

[0006] In this embodiment of the invention, the sum of the thicknesses of the adhesive layer, the textured base layer, the first coating layer, and the second coating layer is 20.2 μm to 35.6 μm.

[0007] In this embodiment of the invention, the thickness of the adhesive layer is 5μm to 15μm, the thickness of the textured base layer is 15μm to 30μm, the thickness of the first coating layer is 0.01μm to 0.5μm, and the thickness of the second coating layer is 0.01μm to 0.5μm.

[0008] In this embodiment of the invention, the adhesion between the base layer and the composite pattern layer is equal to or greater than 4B.

[0009] In this embodiment of the utility model, the adhesive layer is disposed on the side of the first coating layer away from the first textured surface, and the cover plate also includes an explosion-proof layer, which is disposed on the side of the second coating layer away from the second textured surface, and the explosion-proof layer is made of ink material. And / or, the cover plate further includes a first pattern silkscreen layer disposed between the textured base layer and the first plating layer; And / or, the cover plate also includes a second patterned silkscreen layer disposed between the textured base layer and the second plating layer.

[0010] In this embodiment of the invention, the pencil hardness of the adhesive layer is equal to or greater than HB; And / or, the drop height of the ball breaking off the cover plate is set as h, where 45cm ≤ h < 55cm.

[0011] In this embodiment of the invention, the adhesive layer is made of epoxy resin, polyethylene, or polyester. And / or, the textured base layer is made of UV adhesive material.

[0012] In this embodiment of the invention, a plurality of first grooves are provided on one side of the textured base layer to form a first textured surface, and a plurality of second grooves are provided on the other side of the textured base layer to form a second textured surface.

[0013] To achieve the above objectives, the present invention also provides an electronic device, which includes a cover plate as described above.

[0014] Through the above technical solutions, the cover plate and electronic device provided by the present invention have the following beneficial effects: In the technical solution of this utility model, the composite pattern layer provides a first textured surface and a first coating on one side of the textured base layer, and a second textured surface and a second coating on the other side of the textured base layer. This allows the cover plate to have a double-layer textured effect by providing the composite pattern layer, which not only improves the appearance of the cover plate, but also has the advantage of small thickness. Furthermore, the cover plate is connected to the composite pattern layer and the base layer by providing an adhesive layer, which has high connection strength and can stably support the composite pattern layer. This ensures the structural strength of the cover plate while making it both portable and aesthetically pleasing.

[0015] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of the structure of a cover plate according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the textured base layer in a cover plate according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a cover plate having a first pattern silkscreen layer according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the cover plate having a second pattern silkscreen layer according to another embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a cover plate having a first pattern silkscreen layer and a second pattern silkscreen layer according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the adhesive layer in the cover plate before curing and shrinkage according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the adhesive layer in the cover plate after curing and shrinkage according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] The cover plate of this utility model is described below with reference to the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, this utility model provides a cover plate for electronic devices. The cover plate includes a base layer 10, an adhesive layer 20, and a composite pattern layer 30. The base layer 10, adhesive layer 20, and composite pattern layer 30 are arranged sequentially. The composite pattern layer 30 includes a textured base layer 31, a first plating layer 32, and a second plating layer 33. A first textured surface 321 is provided on one side of the textured base layer 31, and a second textured surface 331 is provided on the other side of the textured base layer 31. The first plating layer 32 is provided on the first textured surface 321, and the second plating layer 33 is provided on the second textured surface 331.

[0021] It should be noted that the cover plate of this utility model can be applied to electronic devices such as mobile phones and tablets. This utility model does not limit the types of electronic devices to which the cover plate is applied. Furthermore, the cover plate can be used as the back cover of electronic devices to present texture and light and shadow effects.

[0022] Specifically, the adhesive layer 20 is disposed between the base layer 10 and the composite pattern layer 30. The composite pattern layer 30 includes a first plating layer 32, a textured base layer 31, and a second plating layer 33 stacked sequentially. The textured base layer 31 has a first textured surface 321 on the side facing the first plating layer 32 and a second textured surface 331 on the side facing the second plating layer 33. The adhesive layer 20 is used to bond the base layer 10 and the composite pattern layer 30 so that both the base layer 10 and the adhesive layer 20 can support the composite pattern layer 30, ensuring the structural strength of the cover plate. In the composite pattern layer 30, the textured base layer 31 has a first textured surface 321 and a second textured surface 331 on both sides, and the first plating layer 32 is disposed on the first textured surface 321 and the second plating layer 33 is disposed on the second textured surface 331, so that the composite pattern layer 30 can display a double-layer texture effect.

[0023] In the cover plate of this utility model embodiment, the composite pattern layer 30 provides a first textured surface 321 and a first plating layer 32 on one side of the textured base layer 31, and a second textured surface 331 and a second plating layer 33 on the other side of the textured base layer 31. This allows the cover plate to have a double-layer textured effect by providing the composite pattern layer 30, which not only improves the appearance of the cover plate, but also has the advantage of small thickness. Furthermore, the cover plate is connected to the composite pattern layer 30 and the base layer 10 by providing an adhesive layer 20, which has a high connection strength and can stably support the composite pattern layer 30. This ensures the structural strength of the cover plate while making it both portable and aesthetically pleasing.

[0024] Furthermore, the first coating layer 32 and the second coating layer 33 are respectively disposed on both sides of the textured base layer 31, so that the composite pattern layer 30 can present a three-dimensional light and shadow and dazzling effect while displaying a double-layer texture effect, further improving the aesthetics of the cover plate. The base layer 10, the adhesive layer 20 and the composite pattern layer 30 are stacked in sequence, which has the advantages of small thickness, low light loss and simple bonding process. Due to the design of this structure, the design of the PET layer in the traditional cover plate structure is eliminated (the strength and support effect are compensated by the adhesive layer). Therefore, the thickness is reduced by 34.8% compared with the traditional double base double-layer textured cover plate and by 24.3% compared with the traditional single base single-layer textured cover plate, which has the advantages of small thickness and beautiful appearance.

[0025] In this embodiment of the invention, the sum of the thicknesses of the adhesive layer 20, the textured base layer 31, the first plating layer 32, and the second plating layer 33 is 20.02 μm to 46 μm. Specifically, the composite pattern layer 30 is disposed on the side of the adhesive layer 20 facing away from the base layer 10, and the first plating layer 32, the textured base layer 31, and the second plating layer 33 are stacked sequentially. By setting the sum of the thicknesses of the adhesive layer 20, the textured base layer 31, the first plating layer 32, and the second plating layer 33 to be between 20.02 μm and 46 μm, the cover plate has the advantages of small thickness and easy portability while ensuring structural strength.

[0026] Furthermore, in a preferred embodiment of this utility model, the sum of the thicknesses of the adhesive layer 20, the textured base layer 31, the first plating layer 32, and the second plating layer 33 is 20.2 μm to 35.6 μm. Specifically, setting the sum of the thicknesses of the adhesive layer 20, the textured base layer 31, the first plating layer 32, and the second plating layer 33 to be equal to or greater than 20.2 μm further improves structural strength and extends the service life of the cover plate. Setting the sum of the thicknesses of the adhesive layer 20, the textured base layer 31, the first plating layer 32, and the second plating layer 33 to be equal to or less than 35.6 μm further reduces the thickness of the cover plate and improves portability.

[0027] In this embodiment of the invention, the thickness of the adhesive layer 20 is 5μm to 15μm, the thickness of the textured base layer 31 is 15μm to 30μm, the thickness of the first plating layer 32 is 0.01μm to 0.5μm, and the thickness of the second plating layer 33 is 0.01μm to 0.5μm.

[0028] Specifically, the thickness of the adhesive layer 20 is set between 5μm and 15μm to stably connect the composite pattern layer 30 and the base layer 10, which improves the structural stability of the cover plate and reduces its thickness, thus improving portability. The thickness of the textured base layer 31 is set between 15μm and 30μm to ensure structural strength while showcasing a double-layer texture effect. The thicknesses of the first plating layer 32 and the second plating layer 33 are both set between 0.01μm and 0.5μm, so that the first textured surface 321 and the second textured surface 331 present a three-dimensional light and shadow and dazzling effect, further improving the aesthetic appearance and effectively preventing a significant increase in the thickness of the cover plate, thereby enhancing the user experience and portability.

[0029] Furthermore, in a preferred embodiment of this utility model, the thickness of the textured base layer 31 is 15μm~25μm to further reduce the thickness and improve the portability of the cover plate. The pencil hardness of the textured base layer 31 is equal to or greater than HB to prevent scratches. The transmittance of the textured base layer 31 is equal to or greater than 90% to enhance the light and shadow effect and further improve the aesthetic appearance. Additionally, the thickness of both the first plating layer 32 and the second plating layer 33 is set to 0.1μm~0.3μm to enhance the texture and improve the aesthetics. The first coating 32 and the second coating 33 can be configured as single-layer or multi-layer non-metallic films. Non-metallic films can improve the electromagnetic shielding effect and enhance the quality of the cover plate. The sequential stacking of multiple non-metallic films can improve the light refractive index, thereby enhancing the three-dimensional light and shadow effect and improving the appearance. The first coating 32 and the second coating 33 can be made using the existing NCVM non-conductive electroplating process, which gives the first coating 32 and the second coating 33 high transparency, good adhesion and wear resistance, and makes it easy to present a variety of visual effects such as metallic luster and matte finish, thereby improving the aesthetics of the cover plate.

[0030] In this embodiment of the invention, the adhesion between the base layer 10 and the composite pattern layer 30 is equal to or greater than 4B. Specifically, the adhesive layer 20 is used to connect the base layer 10 and the composite pattern layer 30, so that the adhesion between the base layer 10 and the composite pattern layer 30 is greater than or equal to 4B. This ensures the connection strength between the base layer 10 and the composite pattern layer 30 while exhibiting a dual-texture effect and reducing the overall thickness of the cover plate, thereby improving structural stability.

[0031] In this embodiment of the invention, the pencil hardness of the adhesive layer 20 is equal to or greater than HB, so that the adhesive layer 20 has excellent scratch resistance and good support performance, thereby enhancing durability and appearance retention, and extending the service life of the cover plate.

[0032] In one embodiment of this utility model, the adhesive layer 20 is made of epoxy resin. The epoxy resin adhesive layer 20 significantly enhances the adhesion, weather resistance, and impact resistance of the adhesive layer 20. After curing, the epoxy resin contains a large number of active polar groups (such as epoxy groups, hydroxyl groups, ether bonds, etc.). These active polar groups chemically bond with the silanol groups (Si-OH) on the surface of the base layer 10 to form a stable covalent bond network. Compared to the OCA optical adhesive layer, which mainly relies on intermolecular forces (van der Waals forces) and surface wettability for adhesion, the bond energy of the chemical bonds formed in the epoxy resin adhesive layer 20 is greater than that of the van der Waals forces in the OCA optical adhesive layer, thus significantly improving the adhesion of the adhesive layer 20. Furthermore, the epoxy resin adhesive layer is a rigid chemical bond, which allows the adhesive layer 20 to evenly distribute the impact force on the adhesive layer when subjected to impact, effectively preventing fragmentation damage caused by single-point force and significantly improving impact resistance. In addition, as Figure 6 and Figure 7 As shown, the epoxy resin adhesive layer 20 shrinks after curing and generates stress towards the base layer 10, which causes the adhesive layer 20 to partially offset the impact force when the cover plate is impacted, further improving the drop resistance of the cover plate.

[0033] In another embodiment of the present invention, the adhesive layer 20 is made of polyethylene or polyester material, so that the adhesive layer 20 forms a hard chemical bond, thereby improving the adhesion and impact resistance of the adhesive layer 20.

[0034] In another embodiment of this utility model, the adhesive layer 20 is made of a mixture of polyester and epoxy resin to further improve the adhesion and impact resistance of the adhesive layer 20.

[0035] In this embodiment of the utility model, the textured base layer 31 is made of UV adhesive material. The textured base layer 31 of UV adhesive material has high transparency and excellent adhesion, which not only improves the appearance of the cover plate, but also improves the connection stability.

[0036] In this embodiment of the utility model, the base layer 10 is made of glass, gemstone or ceramic material, the surface hardness of the base layer 10 is equal to or greater than 9H, the transmittance of the base layer 10 is equal to or greater than 92%, and the transmittance of the adhesive layer is equal to or greater than 90%, so as to enhance the overall light and shadow effect of the cover plate and improve the aesthetics of the cover plate.

[0037] In this embodiment of the utility model, the drop ball breaking height of the cover plate is set as h, where 45cm≤h<55cm. Specifically, as shown in Table 1, Table 1 is a test data table of the drop ball breaking height of the cover plate (the base material is glass) of this utility model embodiment and the existing double-base double-layer textured cover plate and single-base single-layer textured cover plate. The cover plate of this utility model embodiment achieves a double texture effect and reduces the thickness size, while also having high drop ball breaking strength, thus improving the overall structural strength and impact resistance of the cover plate.

[0038] Table 1 Test data on ball breakage height

[0039] In this embodiment of the invention, a plurality of first grooves 322 are formed on one side of the textured base layer 31 to form a first textured surface 321, and a plurality of second grooves 332 are formed on the other side of the textured base layer 31 to form a second textured surface 331. Figure 2 As shown, the first groove 322 can be rectangular, circular, elliptical, polygonal, or other shapes, and the second groove 332 can also be rectangular, circular, elliptical, polygonal, or other shapes. Multiple first grooves 322 are disposed on one side of the textured base layer 31 to form a first textured surface 321, and multiple second grooves 332 are disposed on the other side of the textured base layer 31 to form a second textured surface 331, achieving a double-layer texture effect. The cover plate of this invention does not limit the shape and arrangement of the first grooves 322 and the second grooves 332; their shape and arrangement can be flexibly designed according to actual conditions, improving the diversity and aesthetics of the cover plate's appearance. Furthermore, in a preferred embodiment of this invention, the width of the first groove 322 and the second groove 332 is 0.1μm to 10μm, and the depth of the first groove 322 and the second groove 332 is 1μm to 20μm to enhance texture and light and shadow effects, further improving the aesthetic appeal.

[0040] In this embodiment of the present invention, the adhesive layer 20 is disposed on the side of the first plating layer 32 facing away from the first textured surface 321, and the cover plate also includes an explosion-proof layer 40, which is disposed on the side of the second plating layer 33 facing away from the second textured surface 331, and the explosion-proof layer 40 is made of ink material.

[0041] like Figure 1 As shown, the base layer 10, adhesive layer 20, first coating layer 32, textured base layer 31, second coating layer 33 and explosion-proof layer 40 are stacked in sequence. The explosion-proof layer 40, made of ink material, can prevent the base layer 10 from bursting after it breaks, thus improving the structural stability. In addition, the ink explosion-proof layer 40 is opaque and plays a role in reflecting light, further improving the aesthetics of the cover plate.

[0042] In one embodiment of this utility model, such as Figure 3 As shown, the cover plate also includes a first pattern silkscreen layer 50, which is disposed between the texture base layer 31 and the first plating layer 32. The first texture surface 321 formed by the first groove 322 is visible through the unsiliconized portion of the first pattern silkscreen layer 50 to form a pattern, so that the side of the first texture surface 321 on the composite pattern layer 30 presents a pattern effect, which enhances the local texture effect and further improves the aesthetics.

[0043] In another embodiment of this utility model, such as Figure 4 As shown, the cover plate also includes a second pattern silkscreen layer 60, which is disposed between the texture base layer 31 and the second plating layer 33. The second texture surface 331 formed by the second groove 332 is visible through the unsiliconized portion of the second pattern silkscreen layer 60 to form a pattern, so that the side of the second texture surface 331 on the composite pattern layer 30 presents a pattern effect, which enhances the local texture effect and further improves the aesthetics.

[0044] In another embodiment of this utility model, such as Figure 5 As shown, the cover plate also includes a first pattern silkscreen layer 50 and a second pattern silkscreen layer 60. The first pattern silkscreen layer 50 is disposed between the texture base layer 31 and the first plating layer 32, and the second pattern silkscreen layer 60 is disposed between the texture base layer 31 and the second plating layer 33. The first texture surface 321 formed by the first groove 322 is visible through the un-silkscreened part of the first pattern silkscreen layer 50 to form a pattern, so that the side of the composite pattern layer 30 where the first texture surface 321 is located presents a pattern effect. Similarly, the second texture surface 331 formed by the second groove 332 is visible through the un-silkscreened part of the second pattern silkscreen layer 60 to form a pattern, so that the side of the composite pattern layer 30 where the second texture surface 331 is located presents a pattern effect. This results in the composite pattern layer 30 presenting a double-layer texture and three-dimensional pattern effect, which greatly improves the aesthetics of the cover plate.

[0045] In addition, this utility model also provides an electronic device, which includes a cover plate according to the above description, and the specific structure of the cover plate refers to the above embodiments. Since the electronic device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0046] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cover plate for use in electronic devices, characterized in that, The cover plate includes: Basal layer (10); Adhesive layer (20); A composite pattern layer (30) is provided, wherein the base layer (10), the adhesive layer (20) and the composite pattern layer (30) are arranged sequentially. The composite pattern layer (30) includes a textured base layer (31), a first plating layer (32) and a second plating layer (33). A first textured surface (321) is provided on one side of the textured base layer (31), and a second textured surface (331) is provided on the other side of the textured base layer (31). The first plating layer (32) is provided on the first textured surface (321), and the second plating layer (33) is provided on the second textured surface (331).

2. The cover plate according to claim 1, characterized in that, The sum of the thicknesses of the adhesive layer (20), the textured base layer (31), the first plating layer (32), and the second plating layer (33) is 20.02 μm to 46 μm.

3. The cover plate according to claim 2, characterized in that, The sum of the thicknesses of the adhesive layer (20), the textured base layer (31), the first plating layer (32), and the second plating layer (33) is 20.2 μm to 35.6 μm.

4. The cover plate according to claim 2, characterized in that, The thickness of the adhesive layer (20) is 5μm to 15μm, the thickness of the textured base layer (31) is 15μm to 30μm, the thickness of the first plating layer (32) is 0.01μm to 0.5μm, and the thickness of the second plating layer (33) is 0.01μm to 0.5μm.

5. The cover plate according to claim 1, characterized in that, The adhesion between the base layer (10) and the composite pattern layer (30) is equal to or greater than 4B.

6. The cover plate according to claim 5, characterized in that, The adhesive layer (20) is disposed on the side of the first plating layer (32) facing away from the first textured surface (321). The cover plate also includes an explosion-proof layer (40), which is disposed on the side of the second plating layer (33) facing away from the second textured surface (331). The explosion-proof layer (40) is made of ink material. And / or, the cover plate further includes a first pattern silkscreen layer (50), which is disposed between the texture base layer (31) and the first plating layer (32); And / or, the cover plate further includes a second patterned silkscreen layer (60) disposed between the textured base layer (31) and the second plating layer (33).

7. The cover plate according to any one of claims 1 to 6, characterized in that, The pencil hardness of the adhesive layer (20) is equal to or greater than HB; And / or, the drop height of the ball breaking on the cover plate is set as h, where 45cm ≤ h < 55cm.

8. The cover plate according to any one of claims 1 to 6, characterized in that, The adhesive layer (20) is made of epoxy resin, polyethylene or polyester material; And / or, the textured base layer (31) is made of UV adhesive material.

9. The cover plate according to any one of claims 1 to 6, characterized in that, The textured base layer (31) has a plurality of first grooves (322) on one side to form the first textured surface (321), and the textured base layer (31) has a plurality of second grooves (332) on the other side to form the second textured surface (331).

10. An electronic device, characterized in that, The electronic device includes a cover plate according to any one of claims 1 to 9.

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