Cover plate and electronic device

Abstract

A cover plate (10) and an electronic device (1000), relating to the technical field of terminal devices. The cover plate (10) comprises: a support layer (2), wherein the support layer (2) is provided with a first area (201) and a second area (202), the first area (201) and the second area (202) are arranged adjacent to each other, the support layer (2) corresponding to the first area (201) at least comprises a reinforcing plate (22), and the impact strength of the reinforcing plate (22) is greater than or equal to 100 Kg / cm; and a flexible layer (1), the flexible layer (1) being arranged on one side of the outer surface of the support layer (2). The support layer (2) is locally reinforced by the reinforcing plate (22) having a high impact strength, and the flexible layer (1) is arranged on one side of the outer surface of the support layer (2), so that the reinforcing plate (22) for local reinforcement can not only improve the puncture strength of the cover plate (10) to ensure that the cover plate (10) can meet the requirements of protecting apparatuses in the electronic device (1000), but also can avoid the problem such as imprints on the surface of the flexible layer (1) caused by local stress generated by the support layer (2) on the flexible layer (1) during preparation of the cover plate (10) by hot pressing the support layer (2) and the flexible layer (1), thereby ensuring the attractiveness of the outer surface of the cover plate (10).

Description

Covers and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on February 6, 2024, with application number 202420288054.1 and application name “Cover and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of cover plates, and in particular to a cover plate and an electronic device. Background Art

[0003] With the continuous development of consumer electronic products, people have increasingly higher quality demands for the appearance and thickness of consumer electronic products. For example, in the continuous development of cover plates, in order to highlight the high-end quality of electronic devices, electronic device manufacturers need to thin the cover plates. However, simply thinning the cover plates makes them unable to meet the requirements for protecting the internal components of electronic products. To solve this problem, suppliers adopt a method of thinning the cover plates while also locally thickening them, so that the cover plates can meet the requirements for protecting the internal components of electronic products. However, the local thickening process will cause indentations on the outer surface of the cover plates, which cannot meet the visual aesthetic requirements of electronic products.

[0004] Summary of the Invention

[0005] In view of this, the present application proposes a cover plate and an electronic device, wherein the cover plate can meet the requirements of protecting the internal components of the electronic device and has visual beauty.

[0006] In a first aspect of the present application, a cover plate is provided, comprising: a supporting layer, the supporting layer having a first area and a second area, the first area and the second area being adjacently arranged, the supporting layer corresponding to the first area comprising at least a reinforcing plate, the reinforcing plate having an impact strength greater than or equal to 100 kg / cm; and a flexible layer, the flexible layer being arranged on one side of an outer surface of the supporting layer.

[0007] In this solution, the outer surface of the supporting layer refers to the surface that is in direct contact with the user's finger when the user touches the cover of the electronic device. The inner surface of the supporting layer is arranged opposite to the outer surface. The cover of the present application includes a supporting layer and a flexible layer. The supporting layer corresponding to the first area includes at least a reinforcing plate, that is, the area of ​​the supporting layer corresponding to the reinforcing plate is the first area, and the area of ​​the supporting layer not corresponding to the reinforcing plate is the second area. The impact strength of the reinforcing plate is greater than or equal to 100Kg / cm, and can be specifically 100Kg / cm, 110Kg / cm, 120Kg / cm, 130Kg / cm, 150Kg / cm, 160Kg / cm, 180Kg / cm, 200Kg / cm, etc. The present application adopts a high impact strength reinforcement plate to perform local reinforcement treatment on the support layer. Since the flexible layer is arranged on the outer surface side of the support layer, the locally reinforced reinforcement plate can not only improve the puncture strength of the cover plate, but also ensure that the cover plate can meet the requirements of protecting the internal components of the electronic equipment; it can also avoid the support layer from generating local stress on the flexible layer during the hot pressing process of the support layer and the flexible layer to cause marks on the surface of the flexible layer, thereby ensuring the beauty of the outer surface of the cover plate.

[0008] In a feasible embodiment, the support layer further includes a glass fiber substrate, the glass fiber substrate corresponds to the first area and the second area, the thickness of the support layer corresponding to the first area is greater than the thickness of the support layer corresponding to the second area, and the reinforcing plate is located on the side of the glass fiber substrate away from the flexible layer.

[0009] The reinforcement plate and flexible layer are located on either side of the fiberglass substrate, which combines flame retardancy, drop resistance, corrosion resistance, high mechanical strength, and lightweight advantages. The reinforcement plate is applied externally to the cover to provide local reinforcement, improving the cover's puncture resistance. The reinforcement plate also has an impact strength of greater than or equal to 100 kg / cm2. This prevents significant localized stress on the flexible layer during the hot-press lamination process, reducing the possibility of surface marks on the flexible layer and improving the cover's appearance.

[0010] In a feasible implementation manner, an adhesive layer is further provided between the reinforcing plate and the glass fiber substrate.

[0011] Optical glue can be used to coat the side of the glass fiber substrate facing away from the flexible board, and then the reinforcing plate is set on the surface of the optical glue. After curing, an adhesive layer is obtained between the glass fiber substrate and the reinforcing plate. The optical glue is silicone resin, polyurethane resin, polyacrylate resin and epoxy resin, etc. The presence of the adhesive layer can make the fiber glass substrate and the reinforcing plate fit tightly, thereby improving the puncture resistance and service life of the cover plate.

[0012] In a feasible embodiment, the support layer also includes a glass fiber substrate, the glass fiber substrate corresponds to the first area and the second area, the glass fiber substrate includes at least two stacked glass fiber sub-layers, the reinforcing plate is embedded in any of the glass fiber sub-layers, and the thickness of the support layer corresponding to the first area is equal to the thickness of the support layer corresponding to the second area.

[0013] At least two glass fiber sublayers can be prepared first. The glass fiber sublayers are prepared by mixing glass fiber, resin, etc. to form a glass fiber prepreg. The glass fiber prepreg is then punched into sheets of predetermined dimensions for the cover panel to obtain the glass fiber sublayers. A groove of a predetermined shape for a reinforcing plate is formed in the first region of any glass fiber sublayer, the reinforcing plate is embedded in the groove, and finally, the at least two glass fiber sublayers are stacked and hot-pressed to obtain a support layer. A cover panel prepared using the reinforcing plate embedding method has a support layer with the same thickness in the first and second regions. This enhances the cover panel's puncture resistance while preventing the reinforcing plate from generating localized stress on the flexible panel during the hot-pressing process, thereby improving the cover panel's service life and appearance.

[0014] In a feasible embodiment, the number of the reinforcing plate is at least one, and at most one reinforcing plate is embedded in any one of the glass fiber sub-layers.

[0015] In the present application, a reinforcing plate may be embedded in one of at least two stacked glass fiber sub-layers, or in all glass fiber sub-layers, to improve the impact resistance of the cover plate as much as possible.

[0016] In a feasible embodiment, the glass fiber substrate includes at least two stacked glass fiber sub-layers, and the reinforcement plate includes a first reinforcement plate and a second reinforcement plate, wherein the first reinforcement plate is embedded in any of the glass fiber sub-layers, and the second reinforcement plate is located on the side of the glass fiber substrate away from the flexible layer.

[0017] The present application can use both external attachment and embedded methods to set the reinforcement plate on the glass fiber substrate to further enhance the puncture resistance of the cover plate. It is understood that when both external attachment and embedded methods are used to set the reinforcement plate on the glass fiber substrate, the positions of the externally attached reinforcement plate and the embedded reinforcement plate can correspond to each other, and can also be staggered.

[0018] In a feasible embodiment, the number of the first reinforcement plate is at least one, and at most one reinforcement plate is embedded in any one of the glass fiber sub-layers; and the number of the second reinforcement plate is one.

[0019] The support layer of the present application includes at least two stacked fiberglass sublayers. The first reinforcement plate can be embedded in any one fiberglass sublayer, or in multiple fiberglass sublayers, as long as only one first reinforcement plate is provided in each fiberglass sublayer. Because the second reinforcement plate is provided on one side of the fiberglass substrate, the thickness of the cover plate is increased, meaning that the number of second reinforcement plates is one. The number of reinforcement plates can be adjusted based on the impact resistance and strength requirements of the cover plate.

[0020] In a feasible embodiment, the reinforcing plate is selected from a polyimide layer or a polyethylene layer, and the molecular weight of the polyethylene in the polyethylene layer is greater than or equal to 1.5 million.

[0021] Polyimide (PI) is a polymer composed of an imide monomer containing two acyl groups bonded to nitrogen. Polyimide has high-temperature stability, high mechanical properties, and excellent chemical resistance. As a local reinforcement layer, it can reduce the pressure on the cover during the lamination process while improving the appearance quality of the flexible layer. Furthermore, polyimide is an insulating material, which can reduce the impact of the external environment on the internal components of electronic devices. Polyethylene with a molecular weight greater than or equal to 1.5 million is ultra-high molecular weight polyethylene (UHMWPE). UHMWPE has high impact absorption energy and excellent impact strength. It also has good wear resistance and a low coefficient of friction, which can effectively improve the mechanical properties of the cover.

[0022] In a feasible implementation manner, the thickness of the reinforcement plate is 0.02 mm to 0.1 mm.

[0023] The thickness of the reinforcement plate can be specifically 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, or 0.1mm, etc. If the thickness of the reinforcement plate is too large, it will not be conducive to the lightweight and thinning of the cover plate. If the thickness of the reinforcement plate is too small, it will not be conducive to improving the impact resistance of the cover plate. In some embodiments, the thickness of the reinforcement plate is 0.03mm to 0.08mm.

[0024] In a feasible implementation manner, the thickness of the cover plate corresponding to the first area is less than or equal to 0.8 mm.

[0025] The cover plate corresponding to the first region includes a flexible layer, a glass fiber substrate, and a reinforcement plate. The thickness of the cover plate corresponding to the first region is the sum of the thicknesses of the flexible layer corresponding to the first region, the glass fiber substrate corresponding to the first region, and the reinforcement plate. The thin thickness of the cover plate of the present application can meet the requirements of lightweight cover plate while ensuring high mechanical properties.

[0026] In a feasible implementation manner, the thickness of the cover plate corresponding to the second area is less than or equal to 0.7 mm.

[0027] The thickness of the cover plate corresponding to the second area can specifically be 0.3mm, 0.4mm, 0.5mm, 0.6mm or 0.7mm, etc. The cover plate corresponding to the second area includes a flexible layer and a glass fiber substrate. The thickness of the cover plate corresponding to the second area is the sum of the thicknesses of the flexible layer corresponding to the second area and the glass fiber substrate corresponding to the second area. If the thickness of the cover plate corresponding to the second area is too large, it is not conducive to the lightness and thinness of the cover plate. If the thickness of the reinforcing plate is too small, it is not conducive to improving the mechanical properties of the cover plate. In some embodiments, the thickness of the cover plate corresponding to the second area is 0.2mm~0.5mm, and in other embodiments, the thickness of the cover plate corresponding to the second area is 0.3mm~0.4mm.

[0028] In a feasible embodiment, the flexible layer is selected from a polyurethane layer.

[0029] The polyurethane material has a soft texture, good toughness, and certain waterproof function. At the same time, the polyurethane material is rich in color and has various patterns. Applying the polyurethane layer on the outer surface of the supporting layer can enhance the anti-fall performance and waterproof effect of the cover while also improving the texture of the cover.

[0030] In a feasible embodiment, the thickness of the polyurethane layer is 0.1 mm to 0.4 mm.

[0031] The thickness of the polyurethane layer can be specifically 0.1mm, 0.2mm, 0.3mm or 0.4mm. If the thickness of the polyurethane layer is too large, it is not conducive to the thinness of the cover. If the thickness of the polyurethane layer is too small, the anti-drop performance of the cover is reduced.

[0032] In a feasible embodiment, the flexible layer includes at least one protective layer, the protective layer includes a first layer and a second layer stacked together, the first layer is arranged between the second layer and the supporting layer, the first layer is selected from an acrylic layer, and the second layer is selected from a polyurethane layer.

[0033] Compared to the first layer, the second layer is closer to the outer surface of the cover. It's made of polyurethane, a material with a soft texture, good toughness, and a certain degree of waterproofing. Polyurethane also comes in a variety of colors and patterns. Applying the polyurethane layer to the outer surface of the support layer improves the cover's drop resistance and waterproofing, while also enhancing its texture. The first layer is made of acrylic, a material with excellent strength, weather resistance, and impact resistance, which enhances the cover's mechanical properties.

[0034] In a feasible implementation manner, the thickness of the first layer is 0.05 mm to 0.1 mm, and / or the thickness of the second layer is 0.05 mm to 0.1 mm.

[0035] The thickness of the first layer can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, or 0.1mm, etc. The thinner the first layer, the better the mechanical properties of the cover plate, while also contributing to its thinness and weight reduction. The thickness of the second layer can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, or 0.1mm, etc. The thinner the second layer, the better the mechanical properties and appearance of the cover plate, while also contributing to its thinness and weight reduction.

[0036] In a feasible embodiment, the cover plate further includes a protective film, which is arranged on a side of the flexible layer facing away from the supporting layer, and the protective film is selected from a polyurethane film.

[0037] The polyurethane film has good elasticity, thin thickness, and certain waterproof function, which can provide certain protection for the cover. In addition, the polyurethane film has a certain texture structure or color, which enhances the texture of the cover.

[0038] In a second aspect, the present application provides an electronic device, comprising a housing and a cover plate arranged to cover a surface of the housing, wherein the cover plate comprises the cover plate described in the first aspect.

[0039] The electronic device provided in the present application includes the above-mentioned cover plate, so that the electronic device has excellent mechanical properties and appearance quality.

[0040] The cover provided in the embodiments of the present application can ensure that the cover is thin while maintaining a certain structural strength and can also meet the requirements for the aesthetics of the cover. Electronic devices using this cover are drop-resistant, beautiful, and lightweight, which can significantly improve and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a front view of a cover plate in the related art;

[0042] FIG2 is a top view of a cover plate in the related art;

[0043] FIG3 is a schematic diagram of the structure of a mobile phone provided in an embodiment of the present application;

[0044] FIG4 is an exploded view of the mobile phone shown in FIG3 ;

[0045] FIG5 is a second exploded view of the mobile phone shown in FIG3 ;

[0046] FIG6 is a schematic diagram of a cross section AA of the back cover in FIG4 ;

[0047] FIG7 is a schematic diagram of a cross section AA of the back cover in FIG5 ;

[0048] FIG8 is a schematic structural diagram of the cover plate provided in Example 1 of the present application;

[0049] FIG9 is a schematic structural diagram of a single-layer flexible layer provided in Example 1 of the present application;

[0050] FIG10 is a schematic diagram of a multi-layer structure of a flexible layer provided in Example 1 of the present application;

[0051] FIG11 is a schematic structural diagram of a flexible layer provided in Example 1 of the present application, including two stacked protective layers;

[0052] FIG12 is a schematic structural diagram of a support layer provided in Example 1 of the present application;

[0053] FIG13 is a schematic structural diagram of a glass fiber substrate including four glass fiber sub-layers provided in Example 1 of the present application;

[0054] Figures 14(a) to 14(d) are flow charts for preparing the cover plate provided in Example 1 of the present application;

[0055] FIG15 is a schematic structural diagram of a cover plate provided in Example 2 of the present application;

[0056] FIG16 is a schematic diagram of the structure of a reinforcing plate provided in Example 2 of the present application embedded in a glass fiber sublayer that is not in contact with the flexible layer;

[0057] FIG17 is a schematic structural diagram of two reinforcing plates provided in Example 2 of the present application, wherein the orthographic projections of the two reinforcing plates on the flexible layer completely overlap;

[0058] FIG18 is a schematic structural diagram of two reinforcing plates provided in Example 2 of the present application, wherein the orthographic projections of the two reinforcing plates on the flexible layer do not overlap at all;

[0059] Figures 19(a) to 19(f) are flow charts for preparing a cover plate according to Example 2 of the present application;

[0060] FIG20 is a schematic structural diagram of a cover plate provided in Example 3 of the present application;

[0061] FIG21 is a schematic structural diagram of Example 3 of the present application, in which the orthographic projection of the first reinforcing plate on the flexible layer and the orthographic projection of the second reinforcing plate on the flexible layer do not overlap at all;

[0062] Figures 22(a) to 22(h) are flow charts for preparing a cover plate according to Example 3 of the present application. DETAILED DESCRIPTION

[0063] In the description of the embodiments of the present application, it should be understood that the terms "length", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0064] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0065] Some embodiments of the present application are further described in detail below in conjunction with the drawings of this specification.

[0066] In related technologies, cover panels are made of fiberglass, typically with a layer of flexible material such as silicone or leather on one side. This layer enhances the cover's elasticity, protecting the electronic device from drops or scratches. Furthermore, the flexible layer is soft and has a delicate leathery feel, enhancing the cover's texture. With the trend toward thinner electronic devices, higher demands are being placed on cover panels, requiring them to be thinner while protecting the device's internal components.

[0067] In order to solve the above problems, the cover plate is usually prepared by locally thickening the glass fiber board. In this way, the dual requirements of protecting the internal components and reducing the thickness of the cover plate can be met. Figure 1 shows a front view of a cover plate in the related art. The first cover plate 100 includes a flexible material layer 101 and a glass fiber board 102. The glass fiber board 102 has a locally thickened structure on the side facing away from the flexible material layer 101. In the actual preparation process of the first cover plate 100, it is usually necessary to first prepare a locally thickened glass fiber board 102, and then the flexible material layer 101 is bonded to the surface of the glass fiber board 102 by a hot pressing process. During the hot pressing process, the locally thickened glass fiber board 102 will generate local stress on the surface of the flexible material layer 101 during the hot pressing process, resulting in marks on the outer surface of the flexible material layer 101. Figure 2 shows a top view of the first cover plate 100. As can be seen in Figure 2, there are marks on the surface of the flexible material layer 101 (indicated by the dotted line in Figure 2), which results in a poor appearance of the cover plate and affects the texture of the cover plate.

[0068] Therefore, in order to make the cover plate have good mechanical properties while being thin and having a decorative texture, the present application provides a cover plate 10, which can be used for an electronic device 1000. The electronic device 1000 can be a mobile phone, a tablet computer, an e-reader, a laptop computer, a digital camera, a television or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and the like.

[0069] In the embodiment of the present application, a mobile phone is used as the electronic device 1000. FIG3 is a schematic diagram of the structure of the mobile phone. FIG4 is an exploded view of the electronic device 1000, and FIG5 is an exploded view of the electronic device 1000.

[0070] The electronic device 1000 includes a housing 1001 and a display screen 1002. The display screen 1002 is mounted on the housing 1001. Specifically, the housing 1001 includes a frame 1011 and a back cover 1012. The frame 1011 surrounds the periphery of the display screen 1002 and the periphery of the back cover 1012. The display screen 1002 and the back cover 1012 are spaced apart, and the back cover 1012 and the display screen 1002 are respectively located on either side of the frame 1011. The cavity formed between the display screen 1002, the frame 1011, and the back cover 1012 is used to place electronic components, such as a motherboard 1013 and a battery 1014. If the housing 1001 and the display screen 1002 are separated, the electronic components inside the electronic device 1000 can be observed.

[0071] In the present application, the back cover 1012 has an inner surface and an outer surface that are arranged opposite to each other. The outer surface of the back cover refers to the surface that directly contacts the user's fingers when the user touches the mobile phone.

[0072] Figure 6 shows a schematic diagram of cross section AA of the back cover 1012 in Figure 4. As shown in Figures 4 and 6, the center area of ​​the back cover 1012 can be regarded as a planar shell with thickness, and the inner surface of the back cover 1012 is a flat surface, with only the edges of the back cover 1012 being provided with chamfers or curved corners.

[0073] Figure 7 shows a schematic diagram of cross section AA of the back cover 1012 in Figure 5. The central area of ​​the back cover 1012 in Figure 5 can be regarded as a planar shell having a thickness, and a local area on the back cover 1012 has a convex structure, that is, the inner surface of the back cover 1012 is a non-flat surface, and the edge of the back cover 1012 is provided with a chamfer or curved corner.

[0074] Example 1

[0075] Figure 8 shows a structural schematic diagram of the cover plate 10 provided in Example 1 of the present application. The cover plate 10 includes a flexible layer 1 and a support layer 2 arranged in a stacked manner. The flexible layer 1 has an inner surface and an outer surface. The outer surface of the flexible layer 1 refers to the surface that directly contacts the user's finger when the user touches the mobile phone. The inner surface and the outer surface of the flexible layer 1 are arranged opposite to each other, and the support layer 2 is arranged on one side of the inner surface of the flexible layer 1. The support layer 2 serves as the supporting body of the cover plate, and is used to ensure the mechanical properties of the cover plate. The flexible layer 1 is used to provide excellent appearance texture. The flexible layer 1 and the support layer 2 work together to improve the appearance effect and service life of the electronic device 1000.

[0076] In the preparation process of the cover plate of the present application, the support layer 2 and the flexible layer 1 are combined together through a hot pressing lamination process to obtain the cover plate.

[0077] The flexible layer 1 is a layer structure with a certain flexibility and surface texture. In some embodiments, Figure 9 shows a schematic structural diagram of the flexible layer. The flexible layer 1 is a single-layer structure, and the flexible layer 1 is selected from a polyurethane (full name: polyurethane, polyurethane, PU) layer. The polyurethane layer can provide the cover with a soft and textured outer surface, thereby improving the cover's drop resistance and aesthetics. In another embodiment, Figure 10 shows another schematic structural diagram of the flexible layer. The flexible layer 1 is a laminated structure, and the flexible layer 1 includes a protective layer. The protective layer includes a second layer 11 and a first layer 12 that are stacked. The first layer 12 is selected from an acrylic layer, and the second layer 11 is selected from a polyurethane layer. The first layer 12 is located between the second layer 11 and the support layer 2. The acrylic layer has excellent strength, weather resistance, and impact resistance, and can improve the mechanical properties of the cover. The polyurethane layer can provide the cover with a soft and textured outer surface, thereby improving the cover's drop resistance and aesthetics. The polyurethane layer and the acrylic layer work synergistically to improve the mechanical properties, texture, and drop resistance of the cover.

[0078] When the flexible layer 1 of the present application includes a laminated structure, please continue to refer to Figure 10. The flexible layer 1 can be a single-layer protective layer. The flexible layer can also be obtained by laminating multiple layers of protective layers. For example, Figure 11 shows a schematic structural diagram of the flexible layer including two layers of protective layers. The flexible layer 1 includes a second layer 11, a first layer 12, a second layer 11, and a first layer 12 stacked in sequence from top to bottom. The surface of the second layer 11 is the outer surface of the flexible layer 1, so that the outer surface of the cover has excellent softness and leather texture, which can reduce the risk of the electronic device 1000 being dropped, broken, or scratched. It can be understood that those skilled in the art can set the number of protective layers to two, three, or four layers as needed according to the thickness requirements of the cover 10.

[0079] Figure 12 shows a schematic structural diagram of the support layer, wherein the support layer 2 has a first area 201 and a second area 202, which are adjacent to each other. The first area 201 is an area on the support layer 2 that requires local reinforcement, and a reinforcing plate 22 is provided in the support layer 2 corresponding to the first area 201. Correspondingly, no reinforcing plate 22 is provided in the support layer 2 corresponding to the second area 202. It can be understood that the first area 201 and the second area 202 of the support layer 2 of the present application can be divided according to whether there is a reinforcing plate 22, or the area that requires local reinforcement can be preset as the first area 201 based on simulation experiments on the support plate 2, and the other areas of the support layer 2 except the first area 201 are the second area 202. The first area 201 and the second area 202 of the support layer 2 of the present application are artificially divided, and there is no substantial dividing interface between the first area 201 and the second area 202 in the support layer 2 of the present application. For example, please continue to refer to FIG. 12 , the first region 201 is the middle region of the support layer 2 , and the second region 202 surrounds the periphery of the first region 201 . The second region 202 is the edge region of the support layer 2 .

[0080] In some embodiments, the orthographic projection area of ​​the first region 201 on the flexible layer 1 is equal to the orthographic projection area of ​​the reinforcement plate 22 on the flexible layer 1. In another embodiment, the orthographic projection area of ​​the first region 201 on the flexible layer 1 is greater than the orthographic projection area of ​​the reinforcement plate 22 on the flexible layer 1.

[0081] Please continue to refer to Figures 8 and 12. The supporting layer 2 includes a glass fiber substrate 21 and a reinforcing plate 22 arranged on one side of the glass fiber substrate 21, that is, the cover plate 10 includes a flexible layer 1, a glass fiber substrate 21 and a reinforcing plate 22. The flexible layer 1 and the reinforcing plate 22 are respectively arranged on both sides of the glass fiber substrate 21. The glass fiber substrate 21 corresponds to the first area 201 and the second area 202, and the reinforcing plate 22 only corresponds to the first area 201. In this way, the reinforcing plate 22 is arranged on the glass fiber substrate 21 in a locally thickened manner. The impact strength of the reinforcing plate 22 is greater than or equal to 100Kg / cm, which can improve the impact strength of the supporting layer 2. During the hot pressing process of the supporting layer 2 and the flexible layer 1 with the reinforcing plate 22, the local stress generated by the locally thickened reinforcing plate 22 on the flexible layer 1 is reduced, and the possibility of imprints on the surface of the flexible layer 1 is reduced, thereby improving the appearance quality of the cover plate 10.

[0082] Specifically, the glass fiber substrate 21 includes glass fiber woven cloth and resin covering the glass fiber woven cloth, wherein the density of the glass fiber woven cloth can be 0.5g / cm 3 ~2.8g / cm 3 For example, when the density is 1.8 g / cm 3When the glass fiber woven cloth is used, the mass of the glass fiber woven cloth in the glass fiber substrate 21 accounts for 50% to 60%; when the density is 0.8g / cm 3 When the glass fiber woven cloth is used, the mass proportion of the glass fiber woven cloth in the glass fiber substrate 21 is 30% to 40%. It should be noted that glass fiber is an inorganic non-metallic material with the advantages of good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. A glass fiber prepreg is formed by coating a glass fiber substrate with a resin, and then the glass fiber prepreg is punched into a sheet of a preset size of the cover plate to obtain a glass fiber sublayer 211. At least two glass fiber sublayers 211 are stacked and hot-pressed to obtain a glass fiber substrate 21. In some embodiments, 2 to 6 glass fiber sublayers 211 are typically stacked and hot-pressed to obtain a glass fiber substrate 21. For example, Figure 13 shows a glass fiber substrate 21 including four glass fiber sublayers 211, and a reinforcing plate 22 is arranged on one side of the glass fiber substrate 21 to obtain a support layer 2.

[0083] The thickness of the glass fiber substrate 21 is 0.1 mm to 0.5 mm. If the thickness of the glass fiber substrate 21 is too large, it is not conducive to making the cover plate 10 thinner; if the thickness of the glass fiber substrate 21 is too small, it is not conducive to improving the mechanical strength of the cover plate 10 .

[0084] The reinforcing plate 22 can be a polyimide film (PI) layer. Polyimide has excellent thermal stability, mechanical toughness and chemical resistance. It can reduce the local stress acting on the flexible layer 1 during the hot pressing bonding process between the support layer 2 and the flexible layer 1, reduce the possibility of marks on the flexible layer 1, and improve the aesthetics of the cover plate 10.

[0085] The reinforcing plate 22 can also be a polyethylene layer with a molecular weight greater than or equal to 1.5 million. Polyethylene with a molecular weight greater than or equal to 1.5 million is ultra-high molecular weight polyethylene. The larger the molecular weight of the polyethylene, the better its physical and mechanical properties, which is beneficial to reducing the local force of the reinforcing plate 22 on the flexible layer 1 during the hot pressing bonding process. If the molecular weight of the polyethylene is too small, the impact strength of the polyethylene is poor, and it is easy to produce marks on the surface of the flexible layer 1 during the hot pressing bonding process between the support layer 2 and the flexible layer 1.

[0086] Please refer to Figure 8. The cover plate 10 also includes a protective film 3. The protective film 3 is arranged on the outer surface of the cover plate 10, that is, the protective film 3 is arranged on the side of the flexible layer 1 away from the supporting layer 2. The protective film 3 can be, for example, a polyurethane film. The polyurethane film has good anti-static effect, high surface cleanliness, and can withstand high temperature and high humidity, and can provide good protection for the cover plate.

[0087] The thickness of the protective film 3 is 10μm to 30μm, specifically 10μm, 13μm, 15μm, 18μm, 22μm, 25μm, 28μm or 30μm, etc., which is not limited here. Within the above range, it can ensure the lightness and thinness of the cover plate 10 while playing a certain protective role on the cover plate.

[0088] The cover plate 10 of this embodiment can be prepared by the following preparation process:

[0089] (1) The flexible layer 1 is cut into a first preset shape. It can be understood that the size of the first preset shape corresponds to the preset size of the cover plate 10 .

[0090] (2) Cutting the reinforcing plate 22 into a second preset shape. It can be understood that the size of the second preset shape is the size required for local reinforcement on the cover plate 10.

[0091] (3) The glass fibers are woven and pre-impregnated in a resin to prepare a glass fiber prepreg. The glass fiber prepreg is then punched into glass fiber sublayers 211 of a predetermined size for the cover plate 10. Finally, multiple glass fiber sublayers 211 are stacked and placed in a mold for hot pressing to obtain a glass fiber substrate 21. The glass fiber substrate 21 includes woven glass fibers (not shown in the drawings) and a resin that wraps the glass fibers (not shown in the drawings).

[0092] (4) Coat one side of the cut reinforcement plate 22 with optical adhesive, and attach the reinforcement plate 22 with optical adhesive to one side of the glass fiber substrate 21, so that an adhesive layer is formed between the reinforcement plate 22 and the glass fiber substrate 21 (not shown in the drawings). Finally, place the cut flexible layer 1 on the other side of the glass fiber substrate 21 and perform hot pressing and bonding treatment to obtain the cover plate 10. Or

[0093] The trimmed flexible layer 1 is placed on one side of the glass fiber substrate 21 and subjected to a heat-pressing bonding process to combine the flexible layer 1 and the glass fiber substrate 21. Optical adhesive is applied to one surface of the trimmed reinforcement plate 22, and the reinforcement plate 22 with the optical adhesive is attached to the other side of the glass fiber substrate 21 to obtain the cover plate 10. It is understood that the optical adhesive can be silicone resin, polyurethane resin, polyacrylate resin, epoxy resin, etc.

[0094] In some embodiments, the thickness of the adhesive layer is 0.005 mm to 0.02 mm, and specifically can be 0.005 mm, 0.008 mm, 0.01 mm, 0.013 mm, 0.016 mm, 0.018 mm or 0.02 mm.

[0095] It can be understood that the preparation process of the cover plate of the present application is not limited to the order of the above steps. For example, the order of step (2) and step (3) can be interchanged, and those skilled in the art can make adjustments on their own.

[0096] In a feasible embodiment, referring to FIG. 14( a ) to FIG. 14 ( d ), a flow chart of manufacturing a cover plate 10 made of four glass fiber sub-layers 211 is shown, which specifically includes the following steps:

[0097] S1: Impregnate 0.1mm thick glass fiber cloth in epoxy resin glue to prepare glass fiber prepreg, and then punch the glass fiber prepreg into glass fiber sublayers 211 of corresponding size to the preset cover plate 10, please refer to Figures 14(a) to 14(b), put the four glass fiber sublayers 211 into a hot pressing mold, and hot press them at 180°C for 5min to 10min to obtain a glass fiber substrate 21.

[0098] S2: Please refer to Figure 14(b) to Figure 14(c), apply optical adhesive (optical adhesive is not shown in the drawings) to one side of the polyimide reinforcement plate 22 that has been pre-cut to size and has a thickness of 0.05 mm, and attach the reinforcement plate 22 with optical adhesive to one side of the glass fiber substrate 21 to obtain the support layer 2.

[0099] S3: Please refer to Figure 14(c) to Figure 14(d), the pre-cut 0.1mm thick flexible layer 1 is placed on the other side of the support layer 2 and hot-pressed to obtain the cover plate 10.

[0100] The cover plate 10 prepared above was subjected to a puncture test. The specific test steps are as follows:

[0101] A puncture force tester was used to measure the strength of the cover plate 10 according to the GB / T10004-2008 puncture test standard. Specifically, the cover plate 10 with the reinforcement plate 22 was cut into square test pieces with a diameter of 100 mm and mounted on a fixture. A steel needle with a diameter of 1.0 mm and a spherical tip radius of 0.5 mm was then used to puncture the cover plate 10 at a speed of (50±5) mm / min, with the direction of puncture directed from the inner surface of the cover plate 10 toward the outer surface. The maximum load required for the needle to penetrate the test piece was measured. Ten test pieces were tested, and the arithmetic average of these values ​​was taken as the puncture force. The test showed that the cover plate 10 prepared in Example 1 had a puncture force of 100 N.

[0102] The cover provided in Example 1 of the present application is based on a glass fiber substrate 21. A flexible layer 1 is formed on the outer surface of the glass fiber substrate 21. A polyimide reinforcement plate 22 having an impact strength greater than or equal to 100 kg / cm is provided on the inner surface of the glass fiber substrate 21. The polyimide reinforcement plate 22 is only provided in the first region 201. The locally thickened polyimide reinforcement plate 22 of the present application can protect the internal components of the electronic device while improving the visual aesthetics of the cover, and enables the cover to have the advantages of drop resistance, wear resistance, and lightness. Compared to the cover prepared by directly using the glass fiber substrate 21 for local thickening in the conventional technology, the cover of the present application does not generate unevenly distributed local stress on the surface of the flexible layer 1 during the preparation process, thereby reducing the occurrence of marks on the outer surface of the flexible layer 1.

[0103] Example 2

[0104] Figure 15 shows a structural schematic diagram of the cover plate 10 provided in Example 2 of the present application. Different from Example 1, the cover plate 10 includes a flexible layer A1 and a support layer A2 arranged in a stacked manner, the support layer A2 includes a glass fiber substrate A21 and a reinforcing plate A22, the glass fiber substrate A21 includes at least two stacked glass fiber sublayers A211, and the reinforcing plate A22 is embedded in any glass fiber sublayer A211, and the impact strength of the reinforcing plate A22 is greater than or equal to 100Kg / cm.

[0105] For example, as shown in FIG15 , the glass fiber substrate A21 includes two layers of glass fiber sublayers A211. FIG15 only shows that the reinforcing plate A22 is embedded in the glass fiber sublayer in contact with the flexible layer A1. Of course, as shown in FIG16 , the reinforcing plate A22 can also be embedded in the glass fiber sublayer A211 that is not in contact with the flexible layer A1. As shown in FIG17 and FIG18 , the reinforcing plate A22 can also be embedded in both layers of the glass fiber sublayer A211. As shown in FIG17 , the orthographic projections of the two reinforcing plates A22 on the flexible layer A1 completely overlap. As shown in FIG18 , the orthographic projections of the two reinforcing plates A22 on the flexible layer A1 do not overlap at all. Of course, the glass fiber substrate A21 can also include three, four, five, etc. layers of glass fiber sublayers A211, and the position of the reinforcing plate A22 in the glass fiber substrate A21 is not limited. Those skilled in the art can make a reasonable choice based on the performance requirements of the cover plate 10. It can be understood that in this embodiment, the outer surface and the inner surface of the support layer 2 are both flat surfaces.

[0106] In the manufacturing process of the cover plate 10 of the present application, a support layer A2 with a reinforcement plate A22 is first prepared. The support layer A2 and the flexible layer A1 are then combined together through a hot press lamination process to obtain the cover plate. The inner surface of the support layer A2 of the present application is flat, and the support layer A2 does not have the local thickening design shown in Example 1. During the hot press lamination process of the support layer A2 and the flexible layer A1, the support layer A2 does not exert local stress on the flexible layer A1, thus avoiding the formation of marks on the surface of the flexible layer A1 and ensuring the surface quality of the flexible layer A1.

[0107] The cover plate 10 of this embodiment can be prepared by the following preparation process:

[0108] (1) The flexible layer A1 is cut into a first preset shape. It can be understood that the size of the first preset shape corresponds to the preset size of the cover plate 10 .

[0109] (2) Cutting the reinforcing plate A22 into a second preset shape. It can be understood that the size of the second preset shape is the size required for local reinforcement of the cover plate 10.

[0110] (3) The glass fibers are woven and pre-impregnated in resin to prepare glass fiber prepregs, which are then punched into multiple sheets of a preset size for the cover plate, thereby obtaining multiple glass fiber sub-layers A211.

[0111] The thickness of the glass fiber sublayer A211 can be 0.05 mm to 0.3 mm, and specifically can be 0.05, 0.1, 0.2, or 0.3, etc., without limitation. A glass fiber sublayer A211 that is too thick will hinder the lightweight and thinness of the cover board; a glass fiber sublayer A211 that is too thin will hinder the mechanical strength of the cover board.

[0112] (4) The reinforcing plate A22 is embedded in any glass fiber sub-layer A211, and the glass fiber sub-layer A211 with the reinforcing plate A22 and other glass fiber sub-layers A211 are stacked and placed in a mold for hot pressing to obtain a support layer A2.

[0113] In step (4), embedding the reinforcing plate 22 into any glass fiber sublayer 211 includes: first selecting a glass fiber sublayer A211, forming a corresponding groove on the glass fiber sublayer A211 according to the shape of the reinforcing plate A22, and then placing the reinforcing plate A22 in the groove to obtain a glass fiber sublayer A211 with the reinforcing plate A22.

[0114] In step (4), the number of reinforcing plates A22 can be one or more, and the maximum number of reinforcing plates A22 does not exceed the number of glass fiber sub-layers 211.

[0115] (5) The support layer A2 and the flexible layer A1 are stacked and then subjected to a heat-pressing bonding process to obtain a cover plate 10 .

[0116] In a feasible embodiment, referring to FIG. 19( a ) to FIG. 19 ( f ), a flow chart of preparing a cover plate with four glass fiber sub-layers 211 is shown, which specifically includes the following steps:

[0117] S1: 0.1 mm thick glass fiber cloth is impregnated with epoxy resin glue to prepare glass fiber prepreg, and then the glass fiber prepreg is punched into 4 sheets of the corresponding size of the preset cover plate, namely 4 glass fiber sub-layers A211.

[0118] S2: Please refer to Figure 19 (a) to Figure 19 (b), take out any glass fiber sub-layer A211, and groove the glass fiber sub-layer A211 according to the size of the reinforcing plate A22 cut in advance.

[0119] S3: Please refer to Figure 19(b) to Figure 19(c), place a 0.1mm thick polyimide reinforcement plate A22 in the groove of the glass fiber sublayer A211, and selectively fill the gaps on the glass fiber sublayer A211 with a small amount of epoxy resin to make the surface of the glass fiber sublayer A211 flat.

[0120] S4: Please refer to Figure 19 (d) to Figure 19 (e). The glass fiber sublayer A211 with the polyimide reinforced plate A22 and other glass fiber sublayers A221 are stacked and placed in a hot pressing mold. After hot pressing at 180°C for 5 minutes to 10 minutes, a support layer A2 is obtained, in which the glass fiber sublayer A211 with the polyimide reinforced plate A22 is in the middle position.

[0121] S5: Please refer to Figure 19(e) to Figure 19(f), the pre-cut 0.1 mm thick polyurethane flexible layer A1 is placed on one side of the support layer 2 and hot-pressed to obtain the cover plate 10.

[0122] The cover plate 10 prepared above was subjected to a puncture test. The specific test steps were the same as those in Example 1. After the test, the puncture force of the cover plate 10 was 140N.

[0123] The cover plate 10 provided in Example 2 of the present application is based on a glass fiber substrate A21, and a flexible layer A1 is formed on the outer surface of the glass fiber substrate A21. A reinforcing plate A22 with an impact strength greater than or equal to 100 kg / cm is embedded in the interior of the glass fiber substrate A21. In this way, in the process of laminating the glass fiber substrate A21 and the flexible layer A1, the glass fiber substrate A21 with the reinforcing plate A22 will not generate local stress on the flexible layer A1, which can ensure the lightness and mechanical strength of the cover plate A10 while avoiding the appearance of imprints on the outer surface of the cover plate 10.

[0124] Example 3

[0125] Unlike Example 1, the cover panel 10 includes a stacked flexible layer B1 and a support layer B2'. The support layer B2' includes a glass fiber substrate B21 and a reinforcement layer B22. The glass fiber substrate B21 includes at least two stacked glass fiber sublayers B211. There are at least two reinforcement plates B22, one of which is positioned on one side of the support layer B2, and the other reinforcement plates B22 are embedded in the glass fiber sublayer B211. There is only one reinforcement plate B22 positioned on one side of the support layer B2, while there can be multiple reinforcement plates B22 embedded in the glass fiber sublayer B211. At most one reinforcement plate is embedded in each glass fiber sublayer B211, thereby improving the impact resistance of the cover panel 10 while preventing the cover panel 10 from being too thick.

[0126] The following is an example in which the support layer 2' includes two layers of glass fiber substrates B21 and two reinforcing plates B22. Figure 20 shows a structural schematic diagram of a cover plate 10 provided in Example 3 of the present application. The cover plate 10 includes a stacked flexible layer B1 and a support layer B2'. The support layer B2' includes a glass fiber substrate B21 and a reinforcing layer B22. The glass fiber substrate B21 includes two stacked glass fiber sublayers B211. The reinforcing plate B22 includes a first reinforcing plate B221 and a second reinforcing plate B222, wherein the first reinforcing plate B221 is embedded in the glass fiber sublayer B211 in contact with the flexible layer B1, and the second reinforcing plate B222 is arranged on the side of the support layer B2' away from the flexible layer B1.

[0127] The first reinforcing plate B221 is selected from a polyimide layer or a polyethylene layer with a molecular weight greater than or equal to 1.5 million. The second reinforcing plate B222 is selected from a polyimide layer or a polyethylene layer with a molecular weight greater than or equal to 1.5 million. Please continue to refer to Figure 20. The orthographic projection of the first reinforcing plate B221 on the flexible layer B1 and the orthographic projection of the second reinforcing plate B222 on the flexible layer 1 can completely overlap. Of course, please refer to Figure 21. The orthographic projection of the first reinforcing plate B221 on the flexible layer B1 and the orthographic projection of the second reinforcing plate B222 on the flexible layer B1 do not overlap at all. In this way, the presence of the first reinforcing plate B221 and the second reinforcing plate B222 can not only reinforce the glass fiber substrate B21 and improve the mechanical properties of the support layer B2', but also avoid unevenly distributed local stress on the flexible layer B1 during the pressing process of the flexible layer B1 and the support layer B2', thereby improving the appearance quality of the cover plate 10.

[0128] In the preparation process of the cover plate 10 of the present application, a support layer B2 ′ with a reinforcing plate B22 is first prepared, and then the support layer B2 ′ and the flexible layer B1 are combined together through a hot pressing bonding process to obtain the cover plate.

[0129] In a feasible embodiment, referring to FIG. 22 ( a ) to FIG. 22 ( h ), a flow chart of manufacturing a cover plate 10 made of four glass fiber sub-layers B211 is shown, which specifically includes the following steps:

[0130] S1: 0.1 mm thick glass fiber cloth is impregnated with epoxy resin glue to prepare glass fiber prepreg, and then the glass fiber prepreg is punched into 4 sheets of the corresponding size of the preset cover plate, namely 4 glass fiber sub-layers B211.

[0131] S2: Please refer to Figure 22 (a) to Figure 22 (b), take out any glass fiber sub-layer B211, and groove the glass fiber sub-layer B211 according to the size of the reinforcing plate B22 cut in advance.

[0132] S3: Please refer to Figure 22(b) to Figure 22(c), place a 0.1mm thick first reinforcement plate B221 (polyimide) in the groove of the glass fiber sublayer B211, and selectively fill a small amount of epoxy resin into the gaps on the glass fiber sublayer B211 to make the surface of the glass fiber sublayer B211 flat.

[0133] S4: Please refer to Figure 22 (d) to Figure 22 (e). The glass fiber sublayer B211 with the polyimide reinforced plate B22 and other glass fiber sublayers B211 are stacked and placed in a hot pressing mold. After hot pressing at 180°C for 5 minutes to 10 minutes, a support layer B2 is obtained, in which the glass fiber sublayer B211 with the polyimide reinforced plate B22 is in the middle position.

[0134] S5: Please refer to Figure 22 (f) to Figure 22 (g), apply optical adhesive to one side of the 0.1 mm thick second reinforcement plate B222 (polyimide), and attach the second reinforcement plate B222 with optical adhesive to one side of the support layer B2 to obtain the support layer B2'.

[0135] S6: Referring to FIG. 22( h ), a pre-cut 0.1 mm thick polyurethane flexible layer B1 is placed on one side of the support layer B2 ′ and subjected to a hot pressing process to obtain a cover plate 10 .

[0136] The cover plate 10 provided in Example 3 of the present application is based on a glass fiber substrate B21, and a flexible layer B1 is formed on the outer surface of the glass fiber substrate B21. A reinforcing plate B22 with an impact strength greater than or equal to 100Kg / cm is embedded in the interior of the glass fiber substrate B21, and a reinforcing plate B22 with an impact strength greater than or equal to 100Kg / cm is set on the inner surface of the glass fiber substrate B21. In this way, in the process of laminating the glass fiber substrate B21 and the flexible layer B1, the presence of the reinforcing plate B22 will hardly generate local stress on the flexible layer B1, which can ensure the lightness and mechanical strength of the cover plate while reducing the appearance of imprints on the outer surface of the cover plate.

[0137] Comparative Example 1

[0138] A 0.1 mm thick glass fiber cloth is impregnated with epoxy resin glue to prepare a glass fiber prepreg, which is then punched into sheets of the corresponding size of the preset cover plate. Four layers of sheets are stacked and placed in a hot pressing mold. After hot pressing at 180°C for 5 to 10 minutes, a glass fiber substrate is obtained. A polyurethane layer with a thickness of 0.05 mm is then bonded to the other side of the glass fiber substrate through a hot pressing bonding process to obtain a cover plate.

[0139] After testing, the puncture force of the cover plate prepared in Example 1 is 90N.

[0140] Comparative Example 2

[0141] A 0.1 mm thick glass fiber cloth is impregnated in epoxy resin glue to prepare a glass fiber prepreg, and then the glass fiber prepreg is punched into sheets of corresponding size of a preset cover plate. Five layers of sheets are stacked and placed in a hot pressing mold. After hot pressing at 180°C for 5 to 10 minutes, the material is taken out and partially cut on one side of the surface so that the thickness of the middle area is greater than that of the edge area, and the difference in thickness between the middle area and the edge area is 0.05 mm, thereby obtaining a support layer. A polyurethane layer with a thickness of 0.05 mm is then bonded to the other side of the support layer through a hot pressing bonding process to obtain a cover plate.

[0142] After testing, the puncture force of the cover plate prepared in Comparative Example 2 was 100N, and there were marks on the outer surface of the cover plate.

[0143] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the claims. Any person skilled in the art may make several possible changes and modifications without departing from the concept of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. A cover plate, characterized in that: The cover plate comprises: a support layer, the support layer having a first region and a second region, the first region and the second region being adjacent to each other, the support layer corresponding to the first region comprising at least a reinforcing plate, the reinforcing plate having an impact strength greater than or equal to 100 kg / cm; and A flexible layer is provided on one side of the outer surface of the supporting layer.

2. The cover plate according to claim 1, wherein: The supporting layer further includes a glass fiber substrate corresponding to the first region and the second region. The thickness of the supporting layer corresponding to the first region is greater than that of the supporting layer corresponding to the second region. The reinforcing plate is located on a side of the glass fiber substrate away from the flexible layer.

3. The cover plate according to claim 2, wherein: An adhesive layer is further provided between the reinforcing plate and the glass fiber substrate.

4. The cover plate according to claim 1, wherein: The support layer also includes a glass fiber substrate, which corresponds to the first area and the second area. The glass fiber substrate includes at least two stacked glass fiber sub-layers, and the reinforcing plate is embedded in any of the glass fiber sub-layers. The thickness of the support layer corresponding to the first area is equal to the thickness of the support layer corresponding to the second area.

5. The cover plate according to claim 4, characterized in that: The number of the reinforcing plate is at least one, and at most one reinforcing plate is embedded in any one of the glass fiber sub-layers.

6. The cover plate according to any one of claims 1 to 3, characterized in that: The glass fiber substrate includes at least two stacked glass fiber sub-layers, and the reinforcement plate includes a first reinforcement plate and a second reinforcement plate. The first reinforcement plate is embedded in any of the glass fiber sub-layers, and the second reinforcement plate is located on a side of the glass fiber substrate away from the flexible layer.

7. The cover plate according to any one of claim 6, wherein: The number of the first reinforcing plate is at least one, and at most one reinforcing plate is embedded in any one of the glass fiber sub-layers; the number of the second reinforcing plate is one.

8. The cover plate according to any one of claims 1 to 7, characterized in that: The reinforcing plate is selected from a polyimide layer or a polyethylene layer, and the molecular weight of the polyethylene in the polyethylene layer is greater than or equal to 1.5 million.

9. The cover plate according to any one of claims 1 to 8, characterized in that: The thickness of the reinforcing plate is 0.02mm~0.1mm.

10. The cover plate according to any one of claims 1 to 9, characterized in that: The thickness of the cover plate corresponding to the first area is less than or equal to 0.8 mm.

11. The cover plate according to any one of claims 1 to 10, characterized in that: The thickness of the cover plate corresponding to the second area is less than or equal to 0.7 mm.

12. The cover plate according to any one of claims 1 to 11, characterized in that: The flexible layer is selected from polyurethane layers.

13. The cover plate according to any one of claims 1 to 12, characterized in that: The flexible layer includes at least one protective layer, and the protective layer includes a first layer and a second layer stacked together, wherein the first layer is arranged between the second layer and the supporting layer, the first layer is selected from an acrylic layer, and the second layer is selected from a polyurethane layer.

14. The cover plate according to any one of claims 1 to 13, characterized in that: The cover plate further comprises a protective film, which is arranged on a side of the flexible layer facing away from the supporting layer, and the protective film is selected from a polyurethane film.

15. An electronic device, characterized in that: The electronic device includes a housing and a cover plate covering a surface of the housing, wherein the cover plate includes the cover plate according to any one of claims 1 to 14.

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