Cover plate and electronic equipment

Abstract

The utility model relates to the technical field of terminal equipment, and discloses a cover plate and electronic equipment, the cover plate comprises a supporting layer, the supporting layer is provided with a first area and a second area, the first area and the second area are adjacently arranged, the supporting layer corresponding to the first area at least comprises a reinforcing plate, and the impact strength of the reinforcing plate is larger than or equal to 100 Kg / cm; the flexible layer is arranged on one side of the outer surface of the supporting layer. The supporting layer is locally reinforced by adopting the reinforcing plate with high impact strength, and the flexible layer is arranged on one side of the outer surface of the supporting layer, so that the locally reinforced reinforcing plate can improve the puncture strength of the cover plate and ensure that the cover plate can meet the requirement of protecting internal devices of the electronic equipment; in addition, in the process of preparing the cover plate through hot-pressing lamination of the supporting layer and the flexible layer, the problems that the supporting layer generates local stress on the flexible layer, and consequently marks appear on the surface of the flexible layer are solved, and therefore the attractiveness of the outer surface of the cover plate is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of cover plates, and specifically relates to a cover plate and an electronic device. Background Art

[0002] With the continuous development of consumer electronic products, people have higher and higher quality requirements 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, manufacturers of electronic devices need to thin the cover plates. However, simply thinning the thickness of the cover plates makes the cover plates unable to meet the requirements of protecting the internal components of electronic products. To solve the above problems, suppliers adopt local thickening treatment while thinning the cover plates, so that the cover plates can meet the requirements of protecting the internal components of electronic products. However, the local thickening treatment will cause indentations on the outer surface of the cover plates, which cannot meet the visual aesthetic requirements of electronic products. Summary of the Utility Model

[0003] In view of this, this application provides a cover plate and an electronic device. The cover plate can meet the requirements of protecting the internal components of the electronic device and has visual aesthetics at the same time.

[0004] In the first aspect of this application, a cover plate is provided. The cover plate includes: a support layer, the support layer has a first region and a second region, the first region and the second region are adjacent to each other, the support layer corresponding to the first region at least includes a reinforcing plate, and the impact resistance of the reinforcing plate is greater than or equal to 100 Kg / cm; and a flexible layer, the flexible layer is disposed on one side of the outer surface of the support layer.

[0005] In this solution, the outer surface of the support layer refers to the surface that is in direct contact with the user's finger when the user touches the cover plate of the electronic device. The inner surface of the support layer is disposed opposite to the outer surface. The cover plate of this application includes a support layer and a flexible layer. The support layer corresponding to the first region at least includes a reinforcing plate. That is to say, the region of the support layer corresponding to the reinforcing plate is the first region, and the region of the support layer not corresponding to the reinforcing plate is the second region. The impact resistance of the reinforcing plate is greater than or equal to 100 Kg / cm. Specifically, it can be 100 Kg / cm, 110 Kg / cm, 120 Kg / cm, 130 Kg / cm, 150 Kg / cm, 160 Kg / cm, 180 Kg / cm, 200 Kg / cm, etc. This application uses a reinforcing plate with high impact resistance to locally strengthen the support layer. Since the flexible layer is disposed on one side of the outer surface of the support layer, the locally strengthened reinforcing plate can not only improve the puncture strength of the cover plate and ensure that the cover plate can meet the requirements of protecting the internal devices of the electronic device; but also avoid local stress on the flexible layer caused by the support layer during the process of thermocompression bonding the support layer and the flexible layer to prepare the cover plate, thereby avoiding problems such as imprints on the surface of the flexible layer, and thus ensuring the aesthetics of the outer surface of the cover plate.

[0006] In a feasible implementation, the support layer further includes a fiberglass substrate corresponding to the first region and the second region. The thickness of the support layer corresponding to the first region is greater than the thickness of the support layer corresponding to the second region. The reinforcing plate is located on the side of the fiberglass substrate away from the flexible layer.

[0007] The reinforcing plate and the flexible layer are respectively located on both sides of the fiberglass substrate. The fiberglass substrate has the advantages of flame retardancy, drop resistance, corrosion resistance, high mechanical strength, lightness and thinness, etc. The reinforcing plate is subjected to local strengthening treatment by covering with an externally attached cover plate to improve the anti-puncture ability of the cover plate. At the same time, the impact resistance of the reinforcing plate is greater than or equal to 100 Kg / cm, and it will not generate a large local stress on the flexible layer during the hot pressing and laminating process of the support layer and the flexible layer, reducing the possibility of indentations on the outer surface of the flexible layer and improving the appearance quality of the cover plate.

[0008] In a feasible implementation, an adhesive layer is further provided between the reinforcing plate and the fiberglass substrate.

[0009] Optical glue can be coated on the side of the fiberglass substrate away from the flexible plate, and then the reinforcing plate is arranged on the surface of the optical glue. After curing, an adhesive layer arranged between the fiberglass substrate and the reinforcing plate is obtained. The optical glue is silicone resin, polyurethane resin, polyacrylate resin, epoxy resin, etc. The existence of the adhesive layer can make the fiberglass substrate and the reinforcing plate fit tightly, improving the anti-puncture ability and service life of the cover plate.

[0010] In a feasible implementation, the support layer further includes a fiberglass substrate corresponding to the first region and the second region. The fiberglass substrate includes at least two laminated fiberglass sub-layers. The reinforcing plate is embedded in any one of the fiberglass sub-layers. The thickness of the support layer corresponding to the first region is equal to the thickness of the support layer corresponding to the second region.

[0011] At least two fiberglass sub-layers can be prepared first. The fiberglass sub-layers are prepared by mixing fiberglass, resin, etc. into fiberglass prepregs, and then the fiberglass prepregs are punched into sheets of the preset size of the cover plate to obtain the fiberglass sub-layers. By opening a groove with the preset shape of the reinforcing plate in the first region of any one of the fiberglass sub-layers, and then embedding the reinforcing plate into the groove, and finally laminating at least two fiberglass sub-layers and performing hot pressing treatment, a support layer is obtained. For the cover plate prepared by the method of embedding the reinforcing plate, the thickness of the support layer in the first region and the second region is the same, which can enhance the anti-puncture ability of the cover plate and avoid local stress on the flexible plate caused by the reinforcing plate during the hot pressing process, improving the service life and appearance quality of the cover plate.

[0012] In a feasible implementation manner, 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.

[0013] In the present application, a reinforcing plate may be embedded in one of at least two stacked glass fiber sub-layers, or may be embedded in all glass fiber sub-layers to improve the impact resistance of the cover plate as much as possible.

[0014] 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 a side of the glass fiber substrate away from the flexible layer.

[0015] The present application can simultaneously adopt the external attachment and embedding methods to set the reinforcement plate on the glass fiber substrate to further improve the puncture resistance of the cover plate. It can be understood that when the external attachment and embedding methods are adopted to set the reinforcement plate on the glass fiber substrate, the positions of the external attachment reinforcement plate and the embedded reinforcement plate can correspond to each other, and can also be staggered.

[0016] In a feasible implementation manner, 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; the number of the second reinforcement plate is one.

[0017] The support layer of the present application includes at least two stacked glass fiber sub-layers. The first reinforcing plate can be embedded in any one of the glass fiber sub-layers, or in multiple glass fiber sub-layers, as long as one first reinforcing plate is provided in one glass fiber sub-layer. Since the second reinforcing plate is provided on one side of the glass fiber substrate, the provision of the second reinforcing plate increases the thickness of the cover plate, that is, the number of the second reinforcing plate is one. The present application can set the number of reinforcing plates according to the impact resistance and strength requirements of the cover plate.

[0018] In a feasible implementation manner, 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.

[0019] Polyimide (PI) is a polymer of imide monomers 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 plate during the lamination process while improving the appearance quality of the flexible layer. Moreover, polyimide is an insulating material that can reduce the influence 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). Ultra-high molecular weight polyethylene has a high impact absorption energy, excellent impact strength, good wear resistance, and a small friction coefficient, which can effectively improve the mechanical properties of the cover plate.

[0020] In a feasible implementation manner, the thickness of the reinforcing plate is 0.02 mm to 0.1 mm.

[0021] The thickness of the reinforcing plate can specifically be 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, or 0.1 mm, etc. If the thickness of the reinforcing plate is too large, it is not conducive to the thinning of the cover plate. If the thickness of the reinforcing plate is too small, it is not conducive to improving the impact resistance of the cover plate. In some embodiments, the thickness of the reinforcing plate is 0.03 mm to 0.08 mm.

[0022] In a feasible implementation manner, the thickness of the cover plate corresponding to the first region is less than or equal to 0.8 mm.

[0023] The cover plate corresponding to the first region includes a flexible layer, a glass fiber substrate, and a reinforcing 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 reinforcing plate. The cover plate of the present application has a relatively thin thickness, which can meet the requirement of thinning the cover plate while enabling the cover plate to have high mechanical properties.

[0024] In a feasible implementation manner, the thickness of the cover plate corresponding to the second region is less than or equal to 0.7 mm.

[0025] The thickness of the cover plate corresponding to the second region may specifically be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, etc. The cover plate corresponding to the second region includes a flexible layer and a glass fiber substrate. The thickness of the cover plate corresponding to the second region is the sum of the thickness of the flexible layer corresponding to the second region and the thickness of the glass fiber substrate corresponding to the second region. If the thickness of the cover plate corresponding to the second region is too large, it is not conducive to the thinness and lightness of the cover plate. If the thickness of the reinforcement 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 region is 0.2 mm to 0.5 mm. In other embodiments, the thickness of the cover plate corresponding to the second region is 0.3 mm to 0.4 mm.

[0026] In a feasible implementation manner, the flexible layer is selected from polyurethane layers.

[0027] Polyurethane materials are soft in texture, good in toughness, and have a certain waterproof function. At the same time, polyurethane materials are rich in colors and patterns. Applying the polyurethane layer on the outer surface of the support layer can improve the anti-drop performance and waterproof effect of the cover plate, and can also improve the texture of the cover plate.

[0028] In a feasible implementation manner, the thickness of the polyurethane layer is 0.1 mm to 0.4 mm.

[0029] The thickness of the polyurethane layer may specifically be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, etc. If the thickness of the polyurethane layer is too large, it is not conducive to the thinness and lightness of the cover plate. If the thickness of the polyurethane layer is too small, the anti-drop performance of the cover plate will be reduced.

[0030] In a feasible implementation manner, the flexible layer includes at least one protective layer. The protective layer includes a first layer and a second layer arranged in a stacked manner. The first layer is arranged between the second layer and the support layer. The first layer is selected from acrylic layers, and the second layer is selected from polyurethane layers.

[0031] Compared with the first layer, the second layer is closer to the outer surface of the cover plate. The second layer is selected from polyurethane layers. Polyurethane materials are soft in texture, good in toughness, and have a certain waterproof function. At the same time, polyurethane materials are rich in colors and patterns. Applying the polyurethane layer on the outer surface of the support layer can improve the anti-drop performance and waterproof effect of the cover plate, and can also improve the texture of the cover plate. The first layer is selected from acrylic layers. Acrylic materials have excellent strength, weather resistance, and impact resistance, and can improve the mechanical properties of the cover plate.

[0032] 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.

[0033] The thickness of the first layer can specifically be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc. The relatively thin thickness of the first layer is beneficial to improving the mechanical properties of the cover plate and making the cover plate thinner and lighter. The thickness of the second layer can specifically be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc. The relatively thin thickness of the second layer is beneficial to improving the mechanical properties and appearance properties of the cover plate and making the cover plate thinner and lighter.

[0034] In a feasible implementation manner, the cover plate further includes a protective film, the protective film is disposed on a side of the flexible layer away from the support layer, and the protective film is selected from polyurethane films.

[0035] The polyurethane film has good elasticity, a thin thickness, and has a certain waterproof function, and can play a certain protective role for the cover plate. In addition, the polyurethane film has a certain texture structure or color, which improves the texture of the cover plate.

[0036] In a second aspect, the present application provides an electronic device, the electronic device includes a housing and a cover plate disposed on the surface of the housing, and the cover plate includes the cover plate described in the first aspect.

[0037] In the electronic device provided by the present application, including the above cover plate, the electronic device has excellent mechanical properties and appearance quality.

[0038] The cover plate provided by the embodiments of the present application can ensure that the cover plate is thin while maintaining a certain structural strength, and can also meet the aesthetic requirements of the cover plate. The electronic device using this cover plate has the advantages of being drop-resistant, beautiful, and thinner and lighter, and can significantly improve and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is the front view of the cover plate in the related art;

[0040] Figure 2 It is the top view of the cover plate in the related art;

[0041] Figure 3 It is the structural schematic diagram of the mobile phone provided by the embodiment of the present application;

[0042] Figure 4 For Figure 3 the exploded Figure 1 ;

[0043] Figure 5 For Figure 3 the exploded Figure 2 ;

[0044] Figure 6 For Figure 4Schematic diagram of cross-section A-A of the middle rear cover;

[0045] Figure 7 For Figure 5 Schematic diagram of cross-section A-A of the middle rear cover;

[0046] Figure 8 Schematic diagram of the structure of the cover plate provided in Embodiment 1 of the present application;

[0047] Figure 9 Schematic diagram of the structure of the single-layer flexible layer provided in Embodiment 1 of the present application;

[0048] Figure 10 Schematic diagram of the structure of the multi-layer flexible layer provided in Embodiment 1 of the present application;

[0049] Figure 11 Schematic diagram of the structure of the protective layers with two layers of the flexible layer stacked provided in Embodiment 1 of the present application;

[0050] Figure 12 Schematic diagram of the structure of the support layer provided in Embodiment 1 of the present application;

[0051] Figure 13 Schematic diagram of the structure of the glass fiber substrate 21 including four glass fiber sub-layers 211 provided in Embodiment 1 of the present application;

[0052] Figure 14 Flow chart of the preparation of the cover plate provided in Embodiment 1 of the present application;

[0053] Figure 15 Schematic diagram of the structure of the cover plate provided in Embodiment 2 of the present application;

[0054] Figure 16 Schematic diagram of the structure in which the reinforcing plate is embedded in the glass fiber sub-layer that does not contact the flexible layer provided in Embodiment 2 of the present application;

[0055] Figure 17 Schematic diagram of the structure in which the orthographic projections of two reinforcing plates on the flexible layer completely overlap provided in Embodiment 2 of the present application;

[0056] Figure 18 Schematic diagram of the structure in which the orthographic projections of two reinforcing plates on the flexible layer completely do not overlap provided in Embodiment 2 of the present application;

[0057] Figure 19 Flow chart of the preparation of the cover plate provided in Embodiment 2 of the present application;

[0058] Figure 20 Schematic diagram of the structure of the cover plate provided in Embodiment 3 of the present application;

[0059] Figure 21Schematic diagram of the structure where the orthographic projection of the first reinforcing plate provided in Embodiment 3 of the present application on the flexible layer does not coincide with the orthographic projection of the second reinforcing plate on the flexible layer;

[0060] Figure 22 Flow chart for preparing the cover plate provided in Embodiment 3 of the present application. Detailed implementation manners

[0061] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "length", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present utility model 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. Therefore, it should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless otherwise specifically and clearly defined.

[0062] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and 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 a connection that can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0063] The following further elaborates some embodiments of the present utility model in conjunction with the drawings of this specification.

[0064] In the related art, the cover plate is prepared from a glass fiber board. Usually, a flexible material layer such as silica gel or leather is provided on one side of the glass fiber board. On the one hand, the setting of the flexible material layer can improve the elasticity of the cover plate to protect the electronic device from the risk of dropping or scratching; on the other hand, the flexible material layer is soft and has a delicate leathery touch, which can improve the texture of the cover plate. With the development trend of the overall thinning of electronic devices, people have put forward higher requirements for the cover plate, and it is required that the cover plate can protect the internal components of the electronic device while reducing the thickness.

[0065] 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 thinning the cover plate can be met. Figure 1 FIG. 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 side of the glass fiber board 102 facing away from the flexible material layer 101 has a locally thickened structure. In the actual preparation process of the first cover plate 100, it is usually necessary to first prepare the locally thickened glass fiber board 102, and then attach the flexible material layer 101 to the surface of the glass fiber board 102 through 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, resulting in imprints on the outer surface of the flexible material layer 101. Figure 2 FIG. Figure 2 shows a top view of the first cover plate 100. Figure 2 As can be seen in FIG. Figure 2 , there are imprints on the surface of the flexible material layer 101 ( Figure 2 shown by the dotted line in FIG. Figure 2 ), resulting in poor appearance of the cover plate and affecting the texture of the cover plate.

[0066] Therefore, in order to make the cover plate have good mechanical properties while being thin in thickness and also having a decorative texture, the present application provides a cover plate 10. The cover plate 10 can be used in an electronic device 1000, and the electronic device 1000 can be a mobile phone, a tablet computer, an e-reader, a laptop computer, a digital camera, a television, a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or other devices.

[0067] In the embodiments of the present application, taking the mobile phone as the above-mentioned electronic device 1000 as an example for illustration. Figure 3 As shown in FIG. Figure 3 , it is a schematic structural diagram of the electronic device 1000 being a mobile phone. Figure 4 FIG. Figure 4 is an exploded view of the electronic device 1000. Figure 1 , Figure 5 FIG. Figure 5 is an exploded view of the electronic device 1000. Figure 2 .

[0068] 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 rear cover 1012. The frame 1011 surrounds the outer periphery of the display screen 1002 and also surrounds the outer periphery of the rear cover 1012. The display screen 1002 and the rear cover 1012 are spaced apart, and the rear cover 1012 and the display screen 1002 are respectively located on both sides of the frame 1011. The cavity formed among the display screen 1002, the frame 1011, and the rear cover 1012 is used to place electronic components, such as a main board 1013, a battery 1014, etc. If the housing 1001 and the display screen 1002 are separated, the electronic components inside the electronic device 1000 can be observed.

[0069] In this application, the rear cover 1012 has an inner surface and an outer surface which are oppositely arranged. The outer surface of the rear cover refers to the surface that directly contacts the user's fingers when the user touches the mobile phone.

[0070] Figure 6 Shows Figure 4 A schematic diagram of the cross-section A-A of the rear cover 1012 in [reference]. As Figure 4 And Figure 6 Shown, the central area of the rear cover 1012 can be regarded as a planar shell with a thickness. The inner surface of the rear cover 1012 is a flat surface, and only the edge of the rear cover 1012 is provided with a chamfer or a curved corner.

[0071] Figure 7 Shows Figure 5 A schematic diagram of the cross-section A-A of the rear cover 1012 in [reference]. Figure 5 In [reference], the central area of the rear cover 1012 can be regarded as a planar shell with a thickness, and a local area on the rear cover 1012 has a convex structure, that is, the inner surface of the rear cover 1012 is a non-flat surface, and the edge of the rear cover 1012 is provided with a chamfer or a curved corner.

[0072] Embodiment 1

[0073] Figure 8 Shows a schematic diagram of the structure of the cover plate 10 provided in Embodiment 1 of this application. The cover plate 10 includes a flexible layer 1 and a support layer 2 which are stacked. 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 fingers when the user touches the mobile phone. The inner surface of the flexible layer 1 is oppositely arranged with the outer surface. The support layer 2 is arranged on the inner surface side of the flexible layer 1. The support layer 2 serves as the support body of the cover plate to ensure the mechanical properties of the cover plate. The flexible layer 1 is used to provide an excellent appearance texture. The flexible layer 1 and the support layer 2 cooperate to improve the appearance effect and service life of the electronic device 1000.

[0074] In the preparation process of the cover plate of the present application, the support layer 2 and the flexible layer 1 are combined together by a hot pressing process to obtain the cover plate.

[0075] The flexible layer 1 is a layer structure with certain flexibility and surface texture. In some embodiments, Figure 9 A schematic structural diagram of the flexible layer is shown. The flexible layer 1 is a single-layer structure, and the flexible layer 1 is selected from a polyurethane (fully named polycarbamate, polyurethane, PU) layer. The polyurethane layer can provide a soft and textured outer surface for the cover plate, improving the drop resistance and aesthetics of the cover plate. In another embodiment, Figure 10 Another schematic structural diagram of the flexible layer is shown. 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 arranged in a stacked manner. 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, which can improve the mechanical properties of the cover plate. The polyurethane layer can provide a soft and textured outer surface for the cover plate, improving the drop resistance and aesthetics of the cover plate. The polyurethane layer and the acrylic layer work together to improve the mechanical properties, texture, and drop resistance of the cover plate.

[0076] 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 protective layers. Exemplarily, Figure 11 A schematic structural diagram of the flexible layer including two laminated protective layers is shown. The flexible layer 1 includes a second layer 11, a first layer 12, a second layer 11, and a first layer 12 arranged in a stacked manner from top to bottom. Among them, the surface where the second layer 11 is located is the outer surface of the flexible layer 1, so that the outer surface of the cover plate has excellent softness and leather texture, and can reduce the risk of the electronic device 1000 being dropped and damaged or scratched. It can be understood that those skilled in the art can set the number of layers of the protective layer to two, three, four, etc. according to the thickness requirement of the cover plate 10.

[0077] Figure 12The structural schematic diagram of the support layer is shown. The support layer 2 has a first region 201 and a second region 202. The first region 201 and the second region 202 are adjacent to each other. The first region 201 is the region on the support layer 2 that needs to be locally strengthened. An enhancement plate 22 is provided on the support layer 2 corresponding to the first region 201. Correspondingly, the enhancement plate 22 is not provided on the support layer 2 corresponding to the second region 202. It can be understood that the first region 201 and the second region 202 of the support layer 2 in the present application can be divided by the presence or absence of the enhancement plate 22. Alternatively, according to the preset need for local reinforcement such as performing a simulation experiment on the support plate 2, the region that needs to be locally reinforced is the first region 201, and the other regions of the support layer 2 except the first region 201 are the second region 202. The first region 201 and the second region 202 of the support layer 2 in the present application are artificially divided, and there is no substantial division interface between the first region 201 and the second region 202 of the support layer 2 in the present application. Exemplarily, please continue to refer to Figure 12 , the first region 201 is the middle region of the support layer 2, the second region 202 surrounds the outer periphery of the first region 201, and the second region 202 is the edge region of the support layer 2.

[0078] 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 enhancement 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 enhancement plate 22 on the flexible layer 1.

[0079] Please continue to refer to Figure 8 and Figure 12 , the support layer 2 includes a glass fiber substrate 21 and an enhancement plate 22 provided 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 an enhancement plate 22. The flexible layer 1 and the enhancement plate 22 are respectively provided on both sides of the glass fiber substrate 21. The glass fiber substrate 21 corresponds to the first region 201 and the second region 202, and the enhancement plate 22 only corresponds to the first region 201. Thus, the enhancement plate 22 is provided on the glass fiber substrate 21 in a locally thickened manner. The impact resistance of the enhancement plate 22 is greater than or equal to 100 Kg / cm, which can improve the impact resistance of the support layer 2. During the hot pressing and laminating process of the support layer 2 with the enhancement plate 22 and the flexible layer 1, the local stress generated by the locally thickened enhancement plate 22 on the flexible layer 1 is reduced, and the possibility of imprints appearing on the surface of the flexible layer 1 is reduced, thereby improving the appearance quality of the cover plate 10.

[0080] Specifically, the glass fiber substrate 21 includes a glass fiber woven fabric and a resin coating the glass fiber woven fabric. Among them, the density of the glass fiber woven fabric can be 0.5 g / cm 3 ~2.8 g / cm 3 . Exemplarily, when the density of 1.8 g / cm is adopted3 When using fiberglass woven fabric with a density of 0.8 g / cm³, the mass proportion of the fiberglass woven fabric in the fiberglass substrate 21 is 50% - 60%; when using fiberglass woven fabric with a density of 0.8 g / cm 3 ³, the mass proportion of the fiberglass woven fabric in the fiberglass substrate 21 is 30% - 40%. It should be noted that fiberglass is an inorganic non-metallic material, which has advantages such as good insulation, high heat resistance, good corrosion resistance, and high mechanical strength. By coating the fiberglass base material with resin to form a fiberglass prepreg, and then punching the fiberglass prepreg into sheets of the preset size of the cover plate, the fiberglass sub-layer 211 is obtained. Stacking at least two fiberglass sub-layers 211 and performing hot pressing treatment to obtain the fiberglass substrate 21. In some embodiments, usually 2 - 6 fiberglass sub-layers 211 are stacked and hot pressed to obtain the fiberglass substrate 21. Exemplarily, Figure 13 Figure 5 shows a fiberglass substrate 21 including four fiberglass sub-layers 211, and then an enhancement plate 22 is provided on one side of the fiberglass substrate 21 to obtain the support layer 2.

[0081] The thickness of the fiberglass substrate 21 is 0.1 mm - 0.5 mm. If the thickness of the fiberglass substrate 21 is too large, it is not conducive to the thinning of the cover plate 10; if the thickness of the fiberglass substrate 21 is too small, it is not conducive to improving the mechanical strength of the cover plate 10.

[0082] The enhancement plate 22 can be a polyimide (Polyimide Film, PI) layer. Polyimide has excellent thermal stability, mechanical toughness, and chemical resistance, and can reduce the local stress acting on the flexible layer 1 in the hot pressing and laminating process of the support layer 2 and the flexible layer 1, reduce the possibility of the flexible layer 1 generating imprints, and improve the aesthetics of the cover plate 10.

[0083] The enhancement 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 belongs to ultra-high molecular weight polyethylene. The larger the molecular weight of polyethylene, the better its physical and mechanical properties, which is beneficial to reducing the local acting force of the enhancement plate 22 on the flexible layer 1 in the hot pressing and laminating process. If the molecular weight of polyethylene is too small, the impact resistance of polyethylene is poor, and imprints are likely to be generated on the surface of the flexible layer 1 during the hot pressing and laminating process of the support layer 2 and the flexible layer 1.

[0084] Please refer to Figure 8 Figure 6, the cover plate 10 further includes a protective film 3. The protective film 3 is disposed on the outer surface of the cover plate 10, that is, the protective film 3 is disposed on the surface of the flexible layer 1 facing away from the support layer 2. The protective film 3 can be, for example, a polyurethane film. The polyurethane film has good anti-static effect, high surface cleanliness, can withstand high temperature and high humidity, and can play a good protective role for the cover plate.

[0085] The thickness of the protective film 3 is 10 μm to 30 μm, specifically, it can be 10 μm, 13 μm, 15 μm, 18 μm, 22 μm, 25 μm, 28 μm, 30 μm, etc., which is not limited herein. Within the above range, while ensuring the thinness and lightness of the cover plate 10, it plays a certain protective role for the cover plate.

[0086] The cover plate 10 of this embodiment can be prepared by the following preparation process:

[0087] (1) Cut the flexible layer 1 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.

[0088] (2) Cut 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.

[0089] (3) Weave the glass fiber and pre-impregnate it in the resin to prepare a glass fiber prepreg. Then punch the glass fiber prepreg into glass fiber sub-layers 211 with the preset size of the cover plate 10. Finally, stack multiple glass fiber sub-layers 211 and place them in a mold for hot pressing to obtain the glass fiber substrate 21. The glass fiber substrate 21 includes woven glass fibers (not shown in the drawings) and resin (not shown in the drawings) that wraps the glass fibers.

[0090] (4) Coat the optical adhesive on one side surface of the cut reinforcing plate 22, and attach the reinforcing plate 22 with the optical adhesive to one side of the glass fiber substrate 21, so that an adhesive layer (not shown in the drawings) is formed between the reinforcing plate 22 and the glass fiber substrate 21. Finally, set the cut flexible layer 1 on the other side of the glass fiber substrate 21 and perform a hot pressing and laminating process to obtain the cover plate 10. Or

[0091] Set the cut flexible layer 1 on one side of the glass fiber substrate 21 and perform a hot pressing and laminating process so that the flexible layer 1 and the glass fiber substrate 21 are combined together. Coat the optical adhesive on one side surface of the cut reinforcing plate 22, and attach the reinforcing plate 22 with the optical adhesive to the other side of the glass fiber substrate 21 to obtain the cover plate 10. It can be understood that the optical adhesive is silicone resin, polyurethane resin, polyacrylate resin, epoxy resin, etc.

[0092] In some embodiments, the thickness of the adhesive layer is 0.005 mm to 0.02 mm, specifically, it can be 0.005 mm, 0.008 mm, 0.01 mm, 0.013 mm, 0.016 mm, 0.018 mm, 0.02 mm, etc.

[0093] It can be understood that the preparation process of the cover plate of this application is not limited to the above limitation of the step sequence. For example, the order of steps (2) and (3) can be interchanged, and those skilled in the art can adjust it by themselves.

[0094] In a feasible embodiment, please refer to Figure 14 (a) to Figure 14 (d), which shows the preparation flow chart of the cover plate 10 prepared with 4 layers of fiberglass sub-layers 211, specifically including the following steps:

[0095] S1: Immerse the fiberglass cloth with a thickness of 0.1 mm in the epoxy resin sizing solution to prepare a fiberglass prepreg, and then punch the fiberglass prepreg into fiberglass sub-layers 211 corresponding to the size of the preset cover plate 10. Please refer to Figure 14 (a) to Figure 14 (b), put 4 fiberglass sub-layers 211 into a hot pressing mold, and perform hot pressing treatment at 180 °C for 5 min to 10 min to obtain a fiberglass substrate 21.

[0096] S2: Please refer to Figure 14 (b) to Figure 14 Apply an optical adhesive (the optical adhesive is not shown in the attached drawing) to one side surface of the polyimide reinforcing plate 22 with a pre-cut size of 0.05 mm in thickness, and attach the reinforcing plate 22 with the optical adhesive to one side of the fiberglass substrate 21 to obtain a support layer 2.

[0097] S3: Please refer to Figure 14 (c) to Figure 14 (d), set the flexible layer 1 with a thickness of 0.1 mm with a pre-cut size on the other side of the support layer 2 and perform hot pressing treatment to obtain the cover plate 10.

[0098] Perform a puncture test on the prepared cover plate 10, and the specific test steps are as follows:

[0099] Use a puncture force tester to measure according to the GB / T10004-2008 puncture test standard. Specifically: Cut the cover plate 10 with the reinforcing plate 22 into a square test piece with a diameter of 100 mm and install it on the fixture, and then use a steel needle with a diameter of 1.0 mm and a spherical tip radius of 0.5 mm to pierce it at a speed of (50 ± 5) mm / min. The puncture direction is from the inner surface of the cover plate 10 to the outer surface of the cover plate 10, and read the maximum load when the steel needle penetrates the test piece. The number of test pieces is 10, and take their arithmetic mean as the puncture force. After testing, the puncture force of the cover plate 10 prepared in this Example 1 is 100 N.

[0100] The cover plate provided in Embodiment 1 of the present application is based on the glass fiber substrate 21. A flexible layer 1 is formed on the outer surface of the glass fiber substrate 21, and a polyimide reinforcing plate 22 with an impact resistance strength greater than or equal to 100 Kg / cm² is provided on the inner surface of the glass fiber substrate 21. The polyimide reinforcing plate 22 is only provided in the first region 201. Through the locally thickened polyimide reinforcing plate 22, the present application can protect the internal components of the electronic device while improving the visual aesthetic of the cover plate, and enables the cover plate to have the advantages of being drop-resistant, wear-resistant, and thin and light. Compared with the cover plate prepared by directly locally thickening the glass fiber substrate 21 in the traditional technology, the cover plate of the present application will not generate uneven local stress on the surface of the flexible layer 1 during the preparation process, thereby reducing the generation of imprints on the outer surface of the flexible layer 1.

[0101] Embodiment 2

[0102] Figure 15 The schematic structural diagram of the cover plate 10 provided in Embodiment 2 of the present application is shown. Different from Embodiment 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 glass fiber sub-layers A211 arranged in a stacked manner, and the reinforcing plate A22 is embedded in any one of the glass fiber sub-layers A211. The impact resistance strength of the reinforcing plate A22 is greater than or equal to 100 Kg / cm².

[0103] Exemplarily, as Figure 15 shown, the glass fiber substrate A21 includes two glass fiber sub-layers A211. Only the case where the reinforcing plate A22 is embedded in the glass fiber sub-layer in contact with the flexible layer A1 is shown in Figure 15 . Of course, as Figure 16 shown, the reinforcing plate A22 can also be embedded in the glass fiber sub-layer A211 that is not in contact with the flexible layer A1. As Figure 17 and Figure 18 shown, the reinforcing plate A22 can also be embedded in both of the two glass fiber sub-layers A211. As Figure 17 shown, the orthographic projections of the two reinforcing plates A22 on the flexible layer A1 completely overlap. As Figure 18 shown, 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. glass fiber sub-layers 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 selection according to the performance requirements for the cover plate 10. It can be understood that in this embodiment, both the outer surface and the inner surface of the support layer 2 are flat surfaces.

[0104] In the preparation process of the cover plate 10 of the present application, first prepare the support layer A2 with the reinforcing plate A22, and then combine the support layer A2 and the flexible layer A1 together through a hot pressing and laminating process to obtain the cover plate. The inner surface of the support layer A2 of the present application is a flat surface, and there is no local thickening design as shown in Embodiment 1. In the hot pressing and laminating process of the support layer A2 and the flexible layer A1, the support layer A2 will not exert local stress on the flexible layer A1, avoiding the generation of imprints on the surface of the flexible layer A1 and ensuring the appearance quality of the surface of the flexible layer A1.

[0105] The cover plate 10 of this embodiment can be prepared by the following preparation process:

[0106] (1) Cut the flexible layer A1 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.

[0107] (2) Cut 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.

[0108] (3) Weave glass fibers and pre-impregnate them in resin to prepare glass fiber prepregs, and then punch the glass fiber prepregs into multiple sheets of the preset size of the cover plate, that is, obtain multiple glass fiber sub-layers A211.

[0109] The thickness of the glass fiber sub-layer A211 can be 0.05 mm to 0.3 mm, specifically it can be 0.05, 0.1, 0.2 or 0.3, etc., which is not limited here. If the thickness of the glass fiber sub-layer A211 is too large, it is not conducive to the thinning of the cover plate; if the thickness of the glass fiber sub-layer A211 is too small, it is not conducive to improving the mechanical strength of the cover plate.

[0110] (4) Embed the reinforcing plate A22 into any one of the glass fiber sub-layers A211, stack the glass fiber sub-layer A211 with the reinforcing plate A22 and other glass fiber sub-layers A211, and then put them into a mold for hot pressing and forming to obtain the support layer A2.

[0111] In step (4), embedding the reinforcing plate 22 into any one of the glass fiber sub-layers 211 includes: first selecting a glass fiber sub-layer A211, forming a corresponding groove on the glass fiber sub-layer A211 according to the shape of the reinforcing plate A22, and then placing the reinforcing plate A22 in the groove to obtain the glass fiber sub-layer A211 with the reinforcing plate A22.

[0112] In step (4), the number of the reinforcing plates A22 can be one or multiple, and the maximum number of the reinforcing plates A22 does not exceed the number of the glass fiber sub-layers 211.

[0113] (5) Stack the support layer A2 and the flexible layer A1, and then perform hot pressing and laminating treatment to obtain the cover plate 10.

[0114] In a feasible embodiment, please refer to Figure 19 (a) to Figure 19 (f), which shows the preparation flow chart of the cover plate prepared from 4 layers of glass fiber sub-layers 211, specifically including the following steps:

[0115] S1: Immerse a glass fiber cloth with a thickness of 0.1 mm in an epoxy resin sizing solution to prepare a glass fiber prepreg, and then punch the glass fiber prepreg into 4 sheets with the corresponding size of the preset cover plate, which are 4 glass fiber sub-layers A211.

[0116] S2: Please refer to Figure 19 (a) to Figure 19 (b), take out any one of the glass fiber sub-layers A211, and cut a groove on the glass fiber sub-layers A211 according to the size of the pre-cut reinforcement plate A22.

[0117] S3: Please refer to Figure 19 (b) to Figure 19 (c), place a 0.1 mm thick polyimide reinforcement plate A22 in the groove of the glass fiber sub-layers A211, and selectively fill a small amount of epoxy resin into the voids on the glass fiber sub-layers A211 to make the surface of the glass fiber sub-layers A211 flat.

[0118] S4: Please refer to Figure 19 (d) to Figure 19 (e), stack the glass fiber sub-layers A211 with the polyimide reinforcement plate A22 and other glass fiber sub-layers A221, and then put them into a hot pressing mold. After hot pressing at 180 °C for 5 min to 10 min, the support layer A2 is obtained, where the glass fiber sub-layers A211 with the polyimide reinforcement plate A22 are in the middle position.

[0119] S5: Please refer to Figure 19 (e) to Figure 19 (f), place the pre-cut 0.1 mm thick polyurethane flexible layer A1 on one side of the support layer 2 and perform hot pressing treatment to obtain the cover plate 10.

[0120] Perform a puncture test on the above-prepared cover plate 10. The specific test steps are the same as those in Embodiment 1. After testing, the puncture force of the cover plate 10 is 140 N.

[0121] The cover plate 10 provided in Embodiment 2 of the present application is based on the glass fiber substrate A21. A flexible layer A1 is formed on the outer surface of the glass fiber substrate A21, and a reinforcing plate A22 with an impact resistance strength greater than or equal to 100 Kg / cm is embedded inside the glass fiber substrate A21. In this way, during the lamination process of 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, and it can ensure the thinness and mechanical strength of the cover plate A10 while avoiding the appearance of imprints on the outer surface of the cover plate 10.

[0122] Embodiment 3

[0123] Different from Embodiment 1, the cover plate 10 includes a flexible layer B1 and a support layer B2' arranged in layers. The support layer B2' includes a glass fiber substrate B21 and a reinforcing layer B22. The glass fiber substrate B21 includes at least two layers of glass fiber sub-layers B211 arranged in layers. There are at least two reinforcing plates B22. Among them, one reinforcing plate B22 is arranged on one side of the support layer B2, and the other reinforcing plates B22 are embedded in the glass fiber sub-layers B211. The number of the reinforcing plates B22 arranged on one side of the support layer B2 is one, and the reinforcing plates B22 embedded in the glass fiber sub-layers B211 can be multiple. At most one reinforcing plate is embedded in each glass fiber sub-layer B211 to improve the impact resistance of the cover plate 10 while avoiding excessive thickness of the cover plate 10.

[0124] The following takes the support layer 2' including two layers of glass fiber substrate B21 and two reinforcing plates B22 as an example for illustration. Figure 20 FIG. shows a schematic structural diagram of a cover plate 10 provided in Embodiment 3 of the present application. The cover plate 10 includes a flexible layer B1 and a support layer B2' arranged in layers. The support layer B2' includes a glass fiber substrate B21 and a reinforcing layer B22. The glass fiber substrate B21 includes two layers of glass fiber sub-layers B211 arranged in layers. The reinforcing plate B22 includes a first reinforcing plate B221 and a second reinforcing plate B222. Among them, the first reinforcing plate B221 is embedded in the glass fiber sub-layer 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.

[0125] 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 be completely coincident. Of course, please refer to Figure 21, the orthographic projection of the first reinforcing plate B221 on the flexible layer B1 does not coincide with the orthographic projection of the second reinforcing plate B222 on the flexible layer B1 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 generating 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.

[0126] In the manufacturing process of the cover plate 10 of the present application, first, the support layer B2' with the reinforcing plate B22 is prepared, and then the support layer B2' and the flexible layer B1 are combined together through a hot pressing and laminating process to obtain the cover plate.

[0127] In a feasible embodiment, please refer to Figure 22 (a) to Figure 22 (f), which shows the manufacturing flow chart of the cover plate 10 prepared with 4 layers of glass fiber sub-layers B211, specifically including the following steps:

[0128] S1: Immerse a glass fiber cloth with a thickness of 0.1 mm in an epoxy resin sizing solution to prepare a glass fiber prepreg, and then cut the glass fiber prepreg into 4 sheets with the corresponding size of the preset cover plate, which are 4 glass fiber sub-layers B211.

[0129] S2: Please refer to Figure 22 (a) to Figure 22 (b), take out any one of the glass fiber sub-layers B211, and cut a groove on the glass fiber sub-layers B211 according to the size of the pre-cut reinforcing plate B22.

[0130] S3: Please refer to Figure 22 (b) to Figure 22 (c), place the first reinforcing plate B221 (polyimide) with a thickness of 0.1 mm in the groove of the glass fiber sub-layers B211, and selectively fill a small amount of epoxy resin into the gaps on the glass fiber sub-layers B211 to make the surface of the glass fiber sub-layers B211 flat.

[0131] S4: Please refer to Figure 22 (d) to Figure 22 (e), stack the glass fiber sub-layers B211 with the polyimide reinforcing plate B22 and other glass fiber sub-layers B211, and then put them into a hot pressing mold, and perform hot pressing treatment at 180 °C for 5 min to 10 min to obtain the support layer B2, where the glass fiber sub-layers B211 with the polyimide reinforcing plate B22 are in the middle position.

[0132] S5: Please refer to Figure 19 (f) to Figure 19(g) Coat one side surface of the second reinforcing plate B222 (polyimide) with a thickness of 0.1 mm with an optical adhesive, and attach the second reinforcing plate B222 with the optical adhesive to one side of the support layer B2 to obtain a support layer B2'.

[0133] S6: Set the pre-cut polyurethane flexible layer B1 with a thickness of 0.1 mm on one side of the support layer B2' and perform a hot pressing process to obtain the cover plate 10.

[0134] The cover plate 10 provided in Embodiment 3 of the present application is based on the glass fiber substrate B21. A flexible layer B1 is formed on the outer surface of the glass fiber substrate B21, and a reinforcing plate B22 with an impact resistance of greater than or equal to 100 Kg / cm is embedded inside the glass fiber substrate B21, and a reinforcing plate B22 with an impact resistance of greater than or equal to 100 Kg / cm is provided on the inner surface of the glass fiber substrate B21. In this way, during the lamination process of the glass fiber substrate B21 and the flexible layer B1, the presence of the reinforcing plate B22 hardly generates local stress on the flexible layer B1, which can ensure the thinness and mechanical strength of the cover plate while reducing the appearance of imprints on the outer surface of the cover plate.

[0135] Comparative Example 1

[0136] Immerse a glass fiber cloth with a thickness of 0.1 mm in an epoxy resin adhesive solution to prepare a glass fiber prepreg. Then, cut the glass fiber prepreg into sheets of the corresponding size of the preset cover plate, stack 4 sheets and place them in a hot pressing mold, and perform a hot pressing process at 180°C for 5 min to 10 min to obtain a glass fiber substrate. Then, bond a polyurethane layer with a thickness of 0.05 mm to the other side surface of the glass fiber substrate through a hot pressing bonding process to obtain a cover plate.

[0137] After testing, the puncture force of the cover plate prepared in Example 1 is 90 N.

[0138] Comparative Example 2

[0139] Immerse a glass fiber cloth with a thickness of 0.1 mm in an epoxy resin adhesive solution to prepare a glass fiber prepreg. Then, cut the glass fiber prepreg into sheets of the corresponding size of the preset cover plate, stack 5 sheets and place them in a hot pressing mold, and perform a hot pressing process at 180°C for 5 min to 10 min. Take it out and perform local cutting on one side surface of the obtained material so that the thickness of the middle area is greater than the thickness of the edge area, and the thickness difference between the thickness of the middle area and the thickness of the edge area is 0.05 mm to obtain a support layer. Then, bond a polyurethane layer with a thickness of 0.05 mm to the other side surface of the support layer through a hot pressing bonding process to obtain a cover plate.

[0140] After testing, the puncture force of the cover plate prepared in Comparative Example 2 is 100 N, and there are imprints on the outer surface of the cover plate.

[0141] Although the present application is disclosed above with preferred embodiments, it is not intended to limit the claims. Without departing from the concept of the present application, any person skilled in the art can make several possible changes and modifications. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims of the present application.

Claims

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

2. The cover plate according to claim 1, wherein, The support layer further includes a glass fiber substrate corresponding to the first region and the second region. The thickness of the support layer corresponding to the first region is greater than the thickness of the support layer corresponding to the second region, and the reinforcing plate is located on the 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 disposed between the reinforcing plate and the glass fiber substrate.

4. The cover plate according to claim 1, wherein, The support layer further includes a glass fiber substrate corresponding to the first region and the second region. The glass fiber substrate includes at least two glass fiber sub-layers stacked on each other, and the reinforcing plate is embedded in any one of the glass fiber sub-layers. The thickness of the support layer corresponding to the first region is equal to the thickness of the support layer corresponding to the second region.

5. The cover plate according to claim 4, characterized in that, The number of the reinforcing plates 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 claim 2 or 3, characterized in that, The glass fiber substrate includes at least two glass fiber sub-layers stacked on each other. The reinforcing plate includes a first reinforcing plate and a second reinforcing plate. The first reinforcing plate is embedded in any one of the glass fiber sub-layers, and the second reinforcing plate is located on the side of the glass fiber substrate away from the flexible layer.

7. The cover plate according to claim 6, wherein, The number of the first reinforcing plates 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 plates 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 0.02 mm to 0.1 mm.

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 region 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 region 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 a polyurethane layer.

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. The protective layer includes a first layer and a second layer stacked on each other. The first layer is disposed between the second layer and the support 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 includes a protective film disposed on the side of the flexible layer away from the support layer. 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 the surface of the housing. The cover plate includes the cover plate according to any one of claims 1 to 14.

Images