Shell, preparation method thereof and electronic equipment

Abstract

The invention provides a shell, a preparation method thereof and electronic equipment. The shell comprises a leather layer; the substrate layer is arranged on the inner surface of the leather layer; the thickness of the substrate layer is less than or equal to a first preset threshold. According to the shell, the thickness can be reduced on the premise that the strength and the overall reliability are guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic equipment, and in particular to a housing and a preparation method thereof, and electronic equipment. Background Art

[0002] In recent years, as consumers of electronic products have increasingly demanded more appearance from products, the appearance material of the back cover shell has been updated from conventional glass, metal, and ceramic to a new material - synthetic leather. This material can achieve a unique appearance effect of bionic leather grain and a high-end texture, providing users with a warm and comfortable touch and a novel appearance experience to a great extent.

[0003] The conventional synthetic leather back cover shell production process uses glass fiber reinforced resin-based composite materials as the strength support substrate and synthetic leather as the appearance surface. However, for the sake of shell strength and overall reliability, the thickness of the back cover shell is generally controlled at 0.83mm. Under the current trend of thinner and lighter electronic equipment products, this thickness has gradually failed to meet user needs. Summary of the invention

[0004] In order to solve the problems existing in the related art, the present disclosure provides a housing and a preparation method thereof, and an electronic device.

[0005] According to a first aspect of an exemplary embodiment of the present disclosure, there is provided a housing, comprising:

[0006] Leather layer;

[0007] The substrate layer is arranged on the inner surface of the leather layer; the thickness of the substrate layer is less than or equal to a first preset threshold.

[0008] In some exemplary embodiments, the thickness of the shell is less than or equal to a second preset threshold.

[0009] In some exemplary embodiments, the leather layer includes silicone leather.

[0010] In some exemplary embodiments, the substrate layer includes an adhesive and an injection molding material;

[0011] The injection molding material includes at least one of the following:

[0012] Polycarbonate, fiberglass, polyamide, polymethyl methacrylate, acrylonitrile butadiene styrene.

[0013] In some exemplary embodiments, the injection molding material includes any one of the following:

[0014] Polycarbonate;

[0015] Polyamide;

[0016] A blend of polycarbonate and fiberglass;

[0017] A mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer.

[0018] In some exemplary embodiments, the first preset threshold is 0.41 mm; the second preset threshold is 0.67 mm.

[0019] In some exemplary embodiments, the thickness of the leather layer is less than or equal to 0.26 mm.

[0020] In some exemplary embodiments, an anti-fouling layer is formed on the outer surface of the leather layer, and the thickness of the anti-fouling layer is less than or equal to 0.01 mm.

[0021] In some exemplary embodiments, the adhesive includes at least one of acrylate, epoxy resin, phenolic resin, urea-formaldehyde resin, and polyurethane.

[0022] According to a second aspect of an exemplary embodiment of the present disclosure, a method for preparing a shell is provided. The method is used to prepare the above-mentioned shell, and the method comprises:

[0023] Provide leather layer;

[0024] Under a first preset condition, forming an adhesive layer on the inner surface of the leather layer;

[0025] Under the second preset condition, injection molding is performed so that the injection molding material is mixed with the adhesive of the adhesive layer to form a substrate layer.

[0026] In some exemplary embodiments, under a first preset condition, forming an adhesive layer on the inner surface of the leather layer comprises:

[0027] After the adhesive is screen-printed on the inner surface of the leather layer, it is dried at 60-80° C. for 10-20 minutes to solidify the adhesive and form the adhesive layer.

[0028] In some exemplary embodiments, under the second preset condition, injection molding to mix the injection molding material with the adhesive of the adhesive layer to form the substrate layer comprises:

[0029] A protective layer is disposed on a first surface of the adhesive layer away from the leather layer;

[0030] Placing the leather layer in the mold according to the mold positioning direction;

[0031] The protective layer is removed, the mold is closed, and injection molding is performed at a mold temperature of 40-110° C. The injection molding raw material is mixed with the adhesive of the adhesive layer to form the substrate layer.

[0032] In some exemplary embodiments, the protective layer includes one of a polyethylene film, a polypropylene film, and a polyvinyl chloride film.

[0033] In some exemplary embodiments, under the first preset condition, before forming the adhesive layer on the inner surface of the leather layer, the preparation method further comprises:

[0034] A peelable adhesive layer is formed on the outer surface of the leather layer.

[0035] In some exemplary embodiments, a peelable adhesive layer is formed on the outer surface of the leather layer, comprising:

[0036] After the peelable adhesive is screen-printed on the outer surface of the leather layer, it is cured under ultraviolet irradiation to form the peelable adhesive layer.

[0037] According to a third aspect of an exemplary embodiment of the present disclosure, an electronic device is provided. The electronic device includes the above-mentioned housing.

[0038] The beneficial effects of the present disclosure include but are not limited to: in the shell provided by the present disclosure, the thickness of the substrate layer arranged on the inner surface of the leather layer is less than or equal to a first preset threshold value, and the thickness of the shell is reduced while ensuring the strength of the shell. When the shell is applied to the back cover shell of an electronic device, the overall thickness of the electronic device is reduced, which can not only reduce the weight of the electronic device and improve the user experience, but also reduce the manufacturing cost of the electronic device.

[0039] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings incorporated into the specification and constituting a part of the specification illustrate embodiments of the present disclosure and are used together with the description to explain the principles of the embodiments of the present disclosure. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present disclosure, rather than all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 It is a schematic longitudinal section diagram of a rear cover housing of a conventional electronic device;

[0042] Figure 2 is a schematic longitudinal cross-sectional view of a shell of an exemplary embodiment of the present disclosure;

[0043] Figure 3 is a schematic longitudinal cross-sectional view of a shell of an exemplary embodiment of the present disclosure;

[0044] Figure 4 is a schematic longitudinal section diagram of a housing according to an exemplary embodiment of the present disclosure;

[0045] Figure 5 It is a schematic diagram of a method for preparing a shell according to an exemplary embodiment of the present disclosure;

[0046] Figure 6 A schematic diagram of a rear cover housing of a conventional electronic device;

[0047] Figure 7 is a schematic diagram of a housing according to an exemplary embodiment of the present disclosure;

[0048] Figure 8 This is a schematic diagram of a process of injection molding under a second preset condition to mix the injection molding material with the adhesive of the adhesive layer to form a substrate layer according to an exemplary embodiment of the present disclosure;

[0049] Fig. 9 The present invention is a schematic diagram of a method for preparing a shell according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the technical solution of the present disclosure will be clearly and completely described in combination with the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other without conflict.

[0051] like Figure 1 As shown, the conventional rear cover shell 10 of an electronic device is composed of a 0.4mm thick glass fiber board layer 50 as a strength support substrate, a 0.4mm thick synthetic leather layer 30 as an appearance surface, a 0.02mm thick adhesive layer 40 that combines the glass fiber board layer 50 and the synthetic leather layer 30 together, and a 0.01mm thick surface treatment layer is coated on the outer surface of the synthetic leather layer 30. Considering the shell strength and overall reliability, the thickness of the rear cover shell is generally controlled at 0.83mm. Under the current trend of thinning and light electronic equipment products, this thickness has gradually failed to meet the needs of users.

[0052] Based on this, Figure 2 As shown, an exemplary embodiment of the present disclosure provides a shell 11, which includes: a leather layer 13; a substrate layer 15, which is arranged on the inner surface of the leather layer 13; and a thickness of the substrate layer 15 is less than or equal to a first preset threshold.

[0053] The housing 11 provided in the exemplary embodiment of the present disclosure includes a leather layer 13 as an exterior surface and a substrate layer 15 on the inner surface of the leather layer. When the housing is used as a back cover housing of an electronic device, the leather layer 13 as an exterior surface enables the back cover of the electronic device to have a bionic leather grain appearance and a warm and comfortable touch; the substrate layer 15 on the inner surface of the leather layer 13 provides strength support for the housing and ensures the overall reliability of the housing. In the exemplary embodiment provided in the present disclosure, the thickness of the substrate layer 15 on the inner surface of the leather layer 13 is less than or equal to a first preset threshold value, which can achieve the thickness of the housing 11 being thinned while ensuring the strength of the housing 11, thereby thinning the overall thickness of the electronic device, which can not only reduce the weight of the electronic device and improve the user experience, but also reduce the manufacturing cost of the electronic device.

[0054] In an exemplary embodiment provided by the present disclosure, the thickness of the shell is less than or equal to a second preset threshold.

[0055] like Figure 2 As shown, the housing 11 provided by the exemplary embodiment of the present disclosure includes a leather layer 13 and a substrate layer 15 on the inner surface of the leather layer, wherein the thickness of the substrate layer 15 is less than or equal to a first preset threshold value, which can provide strength support for the housing 11 and reduce the overall thickness of the housing 11 while ensuring the overall reliability of the housing 11. In the exemplary embodiment provided by the present disclosure, the thickness of the housing 11 is less than or equal to a second preset threshold value, and when the housing 11 is applied to the back cover housing of an electronic device, the overall thickness of the electronic device is reduced, which can not only reduce the weight of the electronic device and improve the user experience, but also reduce the manufacturing cost of the electronic device.

[0056] In an exemplary embodiment provided by the present disclosure, the leather layer includes silicone leather.

[0057] like Figure 2 As shown in the schematic diagram of the longitudinal section of the shell, the leather layer 13 can be made of silicone leather. Silicone leather is a synthetic leather product with an appearance and feel of bionic leather texture. Selecting silicone leather as the leather layer 13 can make the exterior surface of the shell 11 have the appearance of bionic leather grain and a warm and comfortable touch.

[0058] In addition, silicone leather is usually made of fabric as the base and coated with silicone polymer. The silicone polymer on the surface of silicone leather makes the surface of silicone leather have a lower surface energy, so that the silicone leather itself has the characteristics of low surface energy, anti-fouling and easy to clean, that is, the silicone polymer on the surface of silicone leather forms an anti-fouling layer. The silicone polymer anti-fouling layer on the surface of silicone leather can ensure the anti-fouling and easy-to-clean characteristics of the shell surface without increasing the thickness of the leather layer or the overall thickness of the shell.

[0059] In an exemplary embodiment provided by the present disclosure, the substrate layer includes an adhesive and an injection molding material; the injection molding material includes at least one of the following: polycarbonate, glass fiber, polyamide, polymethyl methacrylate, and acrylonitrile-butadiene-styrene copolymer.

[0060] The substrate layer on the inner surface of the leather layer provides strength support for the shell and ensures the overall reliability of the shell. The substrate layer includes adhesives and injection molding materials, wherein the injection molding materials are the main functional materials of the substrate layer, providing strength support for the shell and ensuring the overall reliability of the shell; and the adhesive is used to bond the injection molding layer formed by the injection molding materials to the leather layer and provide partial strength support for the shell. It should be noted that during the formation of the substrate layer, the adhesive and the injection molding materials may form two relatively distinct layers, such as Figure 3 The longitudinal cross-sectional schematic diagram of the housing shown in FIG. 1 shows that the housing 11 includes a leather layer 13 and a substrate layer 15. The substrate layer 15 is divided into an adhesive layer 14 formed by an adhesive and an injection layer 17 formed by an injection molding material. The adhesive layer 14 formed by the adhesive bonds the injection layer 17 formed by the injection molding material to the leather layer 13. During the formation of the substrate layer, the adhesive and the injection molding material may also form two layers that are not independent and distinct, such as Figure 2 The schematic longitudinal section diagram of the shell shown in the figure shows that the adhesive and the injection molding raw material may be melted and mixed together to form the substrate layer 15 as a whole, so that the substrate layer 15 and the leather layer 13 are combined together.

[0061] Using at least one of polycarbonate, glass fiber, polyamide, polymethyl methacrylate, and acrylonitrile-butadiene-styrene copolymer as an injection molding raw material, for example, using at least one of polycarbonate plastic material, glass fiber, polyamide plastic material, polymethyl methacrylate plastic material, and acrylonitrile-butadiene-styrene copolymer plastic material as an injection molding raw material, the substrate layer can have the characteristics of low specific gravity, high strength, high toughness, high dimensional stability, etc., so that when the thickness of the shell is reduced, it still has high strength and overall reliability.

[0062] In the exemplary embodiments provided by the present disclosure, the injection molding material includes any one of the following: polycarbonate; polyamide; a mixture of polycarbonate and glass fiber; a mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer.

[0063] The injection molding material is the main functional material of the substrate layer, which provides strength support for the shell and ensures the overall reliability of the shell. In the exemplary embodiment provided by the present disclosure, polycarbonate can be selected as the injection molding material. Polycarbonate plastic has high toughness and good impact resistance, which can make the shell still have high strength and overall reliability when the thickness is reduced.

[0064] In the exemplary embodiments provided in the present disclosure, polyamide can be selected as the injection molding material. Polyamide plastic has low specific gravity, high tensile strength and toughness, and can reduce the weight and thickness of the shell while ensuring the strength of the shell.

[0065] In the exemplary embodiment provided by the present disclosure, a mixture of polycarbonate and glass fiber can be selected as the injection molding raw material. Glass fiber can reinforce polycarbonate plastic, greatly improving its mechanical strength. Therefore, when glass fiber reinforced polycarbonate plastic is used as the injection molding raw material, the shell can still have high strength and overall reliability when the thickness is reduced. Among them, when the mixture of polycarbonate and glass fiber is used as the injection molding raw material, the weight percentage of glass fiber in the mixture is 10%-40%. Under this weight percentage range of glass fiber, the injection molding raw material of the mixture of polycarbonate and glass fiber can make the shell have high rigidity while ensuring the toughness of the shell.

[0066] In the exemplary embodiment provided by the present disclosure, a mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer can be selected as an injection molding raw material, so that the shell has higher hardness and toughness, and also has higher stress cracking resistance. Wherein, when the mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer is used as the injection molding raw material, the weight ratio of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer is 1: (0.2-3.6): (0.3-4.2). Within this weight ratio range, the injection molding raw material of the mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer can make the shell have higher hardness and toughness, and also has higher stress cracking resistance.

[0067] In the exemplary embodiments provided in the present disclosure, the substrate layer made of the above-mentioned material can reduce its thickness to less than or equal to 0.41 mm while ensuring high strength and overall reliability, that is, the first preset threshold can be 0.41 mm; and then the thickness of the corresponding shell can be reduced to less than or equal to 0.67 mm, that is, the second preset threshold is 0.67 mm.

[0068] like Figure 2In the schematic longitudinal section diagram of the shell shown, the thickness of the substrate layer 15 on the inner surface of the leather layer is less than or equal to 0.41 mm, which is lower than the thickness of the substrate layer in the prior art of at least 0.42 mm; the thickness of the shell 11 is less than or equal to 0.67 mm, which is lower than the thickness of the electronic device back cover shell in the prior art of at least 0.83 mm. Under the current trend of thinner and lighter electronic equipment products, when the shell provided by the exemplary embodiment of the present disclosure is applied to the back cover shell of an electronic device, the overall thickness of the electronic device can be reduced, which can not only reduce the weight of the electronic device and improve the user experience, but also reduce the manufacturing cost of the electronic device.

[0069] In an exemplary embodiment provided by the present disclosure, the thickness of the leather layer is less than or equal to 0.26 mm.

[0070] The leather layer can be made of silicone leather, which can not only make the shell surface have a bionic leather grain appearance and a warm and comfortable touch, but also reduce the thickness of the leather layer. Figure 2 As shown in the schematic longitudinal section diagram of the shell, the thickness of the leather layer 13 is less than or equal to 0.26 mm, which is lower than the thickness of the synthetic leather layer in the prior art of at least 0.4 mm.

[0071] In an exemplary embodiment provided by the present disclosure, an anti-fouling layer is formed on the outer surface of the leather layer, and the thickness of the anti-fouling layer is less than or equal to 0.01 mm.

[0072] In the related art, the leather grain effect appearance of the conventional synthetic leather back cover cannot compete with glass, ceramics and metal in terms of cleanability, and has the problem of being easily stained and difficult to clean.

[0073] In the exemplary embodiments provided in the present disclosure, Figure 4 The longitudinal cross-sectional schematic diagram of the shell shown in the figure, the shell 11 includes a leather layer 13 and a substrate layer 15, wherein the outer surface of the leather layer 13 also includes an anti-fouling layer 12 with a thickness of less than or equal to 0.01 mm, and the anti-fouling layer 12 has a low surface energy, so that the outer surface of the leather layer 13 is not easy to adhere to dirt, and even if dirt is attached, it is relatively easy to clean. When the shell is applied to the back cover shell of an electronic device, the electronic device can meet the needs of users for long-term use. In the exemplary embodiment of the present disclosure, the leather layer 13 may include, for example, silicone leather. There is a layer of silicone polymer on the surface of the silicone leather, so that the surface of the silicone leather has a low surface energy, so that the silicone leather itself has the characteristics of low surface energy, anti-fouling, and easy to clean, that is, the silicone polymer on the surface of the silicone leather forms an anti-fouling layer. On the basis of not excessively increasing the thickness of the shell, the thickness of the silicone polymer anti-fouling layer on the surface of the silicone leather is less than or equal to 0.01 mm, which can ensure the anti-fouling and easy-to-clean characteristics of the shell surface.

[0074] In an exemplary embodiment provided by the present disclosure, the adhesive includes at least one of acrylate, epoxy resin, phenolic resin, urea-formaldehyde resin, and polyurethane.

[0075] Acrylate, epoxy resin, phenolic resin, urea-formaldehyde resin, and polyurethane are all good thermosetting adhesives. At least one of acrylate, epoxy resin, phenolic resin, urea-formaldehyde resin, and polyurethane is used as an adhesive, so that the adhesive and the injection molding raw material are melted together during injection molding to form a substrate layer, and the substrate layer and the leather layer are combined to form a shell. For example, in the exemplary embodiment provided by the present disclosure, acrylate is selected as the adhesive. The ester group of acrylate has strong hydrogen bonding properties, so it has excellent adhesive properties and can combine the substrate layer and the leather layer to form a shell.

[0076] The exemplary embodiment of the present disclosure provides a method for preparing a shell, and the method is used to prepare the shell provided by the exemplary embodiment of the present disclosure, such as Figure 5 As shown, the preparation method comprises:

[0077] S100: provides leather layer;

[0078] S200: forming an adhesive layer on the inner surface of the leather layer under a first preset condition;

[0079] S300: Under the second preset condition, injection molding is performed to mix the injection molding material with the adhesive of the adhesive layer to form a substrate layer on the inner surface of the leather layer.

[0080] The shell prepared by the shell preparation method provided by the exemplary embodiment of the present disclosure has the appearance effect of bionic leather grain and warm and comfortable touch, so it is necessary to provide a leather layer as the appearance surface of the shell; an adhesive layer is formed on the inner surface of the leather layer, so as to subsequently form a substrate layer on the inner surface of the leather surface; after the adhesive layer is formed on the inner surface of the leather layer, injection molding is performed to mix the injection molding raw material with the adhesive of the adhesive layer to form a substrate layer, and then combined with the leather layer to form a shell.

[0081] It should be noted that during the injection molding process to mix the injection molding material with the adhesive of the adhesive layer and form the backing layer on the inner surface of the leather layer, the adhesive and the injection molding material may be partially mixed, so that two relatively distinct layers are formed, such as Figure 3 The longitudinal cross-sectional schematic diagram of the housing shown in FIG. 1 shows that the housing 11 includes a leather layer 13 and a substrate layer 15. The substrate layer 15 is divided into an adhesive layer 14 formed by an adhesive and an injection layer 17 formed by an injection molding material. The adhesive layer 14 formed by the adhesive bonds the injection layer 17 formed by the injection molding material to the leather layer 13. During the formation of the substrate layer, the adhesive and the injection molding material may also be completely mixed to form a layer, namely, the substrate layer. Figure 2The schematic longitudinal section diagram of the shell shown in the figure shows that the adhesive and the injection molding raw material may be melted and mixed together to form the substrate layer 15 as a whole, so that the substrate layer 15 and the leather layer 13 are combined together.

[0082] When the shell prepared by the shell preparation method provided by the exemplary embodiment of the present disclosure is used as the back cover shell of an electronic device, the leather layer as the appearance surface makes the back cover of the electronic device have the appearance effect of bionic leather grain and warm and comfortable touch; the injection molding raw material and the adhesive of the adhesive layer are mixed to form a substrate layer on the inner surface of the leather layer. The substrate layer of the shell is formed by injection molding. Under the premise of ensuring the strength of the shell, the thickness of the shell can be reduced, thereby reducing the overall thickness of the electronic device. This can not only reduce the weight of the electronic device and improve the user experience, but also reduce the manufacturing cost of the electronic device.

[0083] In addition, in the related art, the conventional synthetic leather back cover shell manufacturing process uses a glass fiber board as a strength support substrate and synthetic leather as an appearance surface. However, it is limited by the requirements of the glass fiber board molding process, such as Figure 6 As shown in the schematic diagram of the back cover shell of a conventional electronic device, a narrow plastic frame 21 is required around the shell to prevent the fiberglass burrs, which greatly affects the integrity of the leather grain appearance.

[0084] The method for preparing the shell provided by the exemplary embodiment of the present disclosure uses injection molding to mix the injection molding raw material with the adhesive of the adhesive layer to form a substrate layer on the inner surface of the leather layer, so there is no problem of fiberglass burrs, and no plastic frame retaining wall around the shell is required. Figure 7 As shown in the schematic diagram of the shell, the shell prepared by the shell preparation method provided by the exemplary embodiment of the present disclosure has an integrated leather texture appearance effect, meeting the requirements of shell design refinement.

[0085] In the exemplary embodiment provided in the present disclosure, under a first preset condition, an adhesive layer is formed on the inner surface of the leather layer, including: after screen printing the adhesive on the inner surface of the leather layer, drying at 60-80°C for 10-20 minutes to solidify the adhesive to form an adhesive layer.

[0086] Before forming the adhesive layer on the inner surface of the leather layer, the large leather layer can be cut into pieces to form a leather layer of appropriate size to facilitate subsequent process operations, such as forming a leather layer of (0.5-1.5)m*(0.5-1.5)m in size. The adhesive is screen-printed on the inner surface of the leather layer. The screen-printing coating method can make the adhesive coated on the inner surface of the leather layer as uniform as possible, so as to form a substrate layer on the inner surface of the leather layer later. After the adhesive is screen-printed on the inner surface of the leather layer, it is dried at 60-80°C for 10-20 minutes, and the adhesive is cured on the inner surface of the leather layer to form an adhesive layer with a thickness of less than or equal to 0.01mm.

[0087] In the exemplary embodiment provided by the present disclosure, under the second preset condition, injection molding is performed so that the injection molding material is mixed with the adhesive of the adhesive layer to form a substrate layer, such as Figure 8 As shown, including:

[0088] S301: Disposing a protective layer on a first surface of the adhesive layer away from the leather layer.

[0089] In order to prevent dirt from being brought into the adhesive layer formed on the inner surface of the leather layer during the shell preparation process, after the adhesive layer is formed on the inner surface of the leather layer and before the leather layer is placed in the mold, a protective layer is first provided on the first surface of the adhesive layer away from the leather layer to protect the adhesive layer. In addition, the protective layer can also provide a certain hardness support, so as to facilitate the subsequent placement of the leather layer in the mold and flatten the leather layer.

[0090] In an exemplary embodiment provided by the present disclosure, the protective layer includes one of a polyethylene film, a polypropylene film, and a polyvinyl chloride film.

[0091] Polyethylene film, polypropylene film, and polyvinyl chloride film are all common plastic films with low cost. One of the polyethylene film, polypropylene film, and polyvinyl chloride film is selected as a protective layer and coated on the first surface of the adhesive layer away from the leather layer to protect the adhesive layer and prevent dirt from being brought into the adhesive layer formed on the inner surface of the leather layer during the shell preparation process. When there is no need to protect the adhesive layer, the polyethylene film, polypropylene film, or polyvinyl chloride film can be easily removed, for example, it can be directly peeled off from the adhesive layer, thereby improving the convenience of shell preparation.

[0092] S302: placing the leather layer in the mold according to the mold positioning direction.

[0093] Before placing the leather layer in the mold, the leather layer can be cut into small pieces by laser cutting to form a leather layer close to the shape of the prepared shell. The leather layer is perforated according to the positioning columns of the mold, and the holes in the leather layer are inserted into the positioning columns of the mold according to the positioning direction of the mold. The leather layer is placed in the mold to complete the loading, so that the leather layer can be accurately positioned in the mold so that after subsequent injection molding, a shell with stable appearance and size can be formed.

[0094] S303: removing the protective layer, closing the mold, and performing injection molding at a mold temperature of 40-110° C., wherein the injection molding raw material is mixed with the adhesive of the adhesive layer to form a substrate layer.

[0095] After placing the leather layer in the mold, the protective layer is removed to expose the adhesive layer. After the mold is closed, injection molding is performed. At a mold temperature of 40-110°C, the injection molding raw material and the adhesive of the adhesive layer are melted and mixed to form a substrate layer. After cooling, it is taken out of the mold to finally obtain a shell.

[0096] In the exemplary embodiments provided in the present disclosure, after the shell obtained by injection molding is taken out of the mold, the shell shape can also be subjected to CNC machining (CNC machining, computer numerical control machining), for example, the shell is polished around or the shell shape is processed to meet the subsequent application requirements of the shell.

[0097] In an exemplary embodiment provided by the present disclosure, under the first preset condition, before forming the adhesive layer on the inner surface of the leather layer, the preparation method further includes: forming a peelable adhesive layer on the outer surface of the leather layer.

[0098] In the exemplary embodiments provided by the present disclosure, the outer surface of the leather layer has an anti-fouling layer. For example, when silicone leather is selected as the leather layer, the surface of the silicone leather has a layer of silicone polymer, so that the surface of the silicone leather has a lower surface energy, so that the silicone leather itself has the characteristics of low surface energy, anti-fouling, and easy cleaning. Before forming an adhesive layer on the inner surface of the leather layer, a peelable adhesive layer is first formed on the outer surface of the leather layer to protect the anti-fouling layer on the outer surface of the leather layer, so as to avoid damage to the anti-fouling layer on the outer surface of the leather layer during subsequent high-temperature injection molding in the mold, thereby affecting the anti-fouling and easy-to-clean performance of the outer surface of the leather layer.

[0099] In an exemplary embodiment provided by the present disclosure, a removable adhesive layer is formed on the outer surface of the leather layer, comprising: screen printing a removable adhesive on the outer surface of the leather layer, and curing the removable adhesive under ultraviolet light to form the removable adhesive layer.

[0100] In order to protect the anti-fouling layer on the outer surface of the leather layer, a removable adhesive is first applied to the outer surface of the leather layer before forming an adhesive layer on the inner surface of the leather layer, wherein the removable adhesive is an ultraviolet curing adhesive. After the removable adhesive is evenly applied to the outer surface of the leather layer by screen printing, the removable adhesive is cured under ultraviolet irradiation, such as mercury lamp irradiation, to form a removable adhesive layer, which can protect the anti-fouling layer on the outer surface of the leather layer, and avoid damage to the anti-fouling layer on the outer surface of the leather layer during subsequent high-temperature injection molding in the mold, thereby affecting the anti-fouling and easy-to-clean performance of the outer surface of the leather layer. After the injection molding is completed, the shell is taken out of the mold, and the removable adhesive layer can be peeled off and removed.

[0101] In the exemplary embodiment provided in the present disclosure, after the injection molding is completed and the shell is made, the shell is taken out of the mold, and after the removable adhesive layer is peeled off, a LOGO decoration can be made on the outer surface of the leather layer by embossing or laser engraving, so that the prepared shell meets subsequent application requirements.

[0102] The exemplary embodiment of the present disclosure provides an electronic device, which includes a housing provided by the exemplary embodiment of the present disclosure. When the housing provided by the exemplary embodiment of the present disclosure is used as the back cover of the electronic device, the overall thickness of the electronic device can be reduced, which is adapted to the current demand for thin and light electronic device design; moreover, the electronic device does not need to be provided with a plastic retaining wall around the housing, and can achieve an integrated leather grain appearance effect of the back cover, meeting the demand for design refinement; in addition, the leather grain appearance surface of the electronic device has low surface energy, is resistant to dirt, and is easy to clean, which can meet the needs of users for long-term use.

[0103] like Fig. 9 As shown, a specific example of using the method for preparing a shell provided by the exemplary embodiment of the present disclosure to prepare a shell is given.

[0104] S401 provides leather layer.

[0105] S402 Coating a peelable adhesive: Screen-printing a peelable adhesive on the outer surface of the leather layer.

[0106] S403 mercury lamp: the peelable adhesive is cured under ultraviolet light to form a peelable adhesive layer.

[0107] S404 Adhesive coating: Screen printing adhesive on the inner surface of the leather layer.

[0108] S405 baking: drying at 60-80°C for 10-20 minutes to solidify the adhesive to form an adhesive layer.

[0109] S406: Disposing a protective layer: Disposing a protective layer on the first surface of the adhesive layer away from the leather layer.

[0110] S407 Laser cutting of small pieces: The leather layer is cut into small pieces by laser cutting to form a leather layer that is close to the shape of the prepared shell.

[0111] S408 Loading: Place the leather layer in the mold according to the direction of mold positioning.

[0112] S409 removes the protective layer.

[0113] S410 injection molding: Injection molding is performed at a mold temperature of 40-110°C to form a shell.

[0114] S411 CNC: CNC machining of the shell shape.

[0115] S412 removes the peelable adhesive layer.

[0116] S413 embossed / laser engraved LOGO.

[0117] S414 quality inspection.

[0118] The shell prepared by the shell preparation method has a leather layer on the outer surface, which makes the shell have a bionic leather grain appearance and a warm and comfortable touch; the shell substrate layer formed by injection molding can reduce the thickness of the shell while ensuring the strength of the shell. When the shell is used as a back cover shell of an electronic device, it can not only improve the user's tactile experience, but also reduce the overall thickness of the electronic device, reduce the weight of the electronic device, and reduce the manufacturing cost of the electronic device.

[0119] The contents described above may be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present disclosure.

[0120] Finally, it should be noted that in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0121] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A housing, characterized in that: include: Leather layer; A substrate layer, disposed on the inner surface of the leather layer; The thickness of the substrate layer is less than or equal to a first preset threshold.

2. The housing according to claim 1, characterized in that The thickness of the shell is less than or equal to a second preset threshold.

3. The housing according to claim 1, characterized in that The leather layer includes silicone leather.

4. The housing according to claim 1, characterized in that The substrate layer includes an adhesive and injection molding materials; The injection molding material includes at least one of the following: Polycarbonate, fiberglass, polyamide, polymethyl methacrylate, acrylonitrile butadiene styrene.

5. The housing according to claim 4, characterized in that: The injection molding material includes any one of the following: Polycarbonate; Polyamide; A blend of polycarbonate and fiberglass; A mixture of polycarbonate, polymethyl methacrylate and acrylonitrile-butadiene-styrene copolymer.

6. The housing according to claim 2, characterized in that The first preset threshold is 0.41 mm; the second preset threshold is 0.67 mm.

7. The housing according to claim 6, characterized in that The thickness of the leather layer is less than or equal to 0.26 mm.

8. The housing according to claim 6, characterized in that An anti-fouling layer is formed on the outer surface of the leather layer, and the thickness of the anti-fouling layer is less than or equal to 0.01 mm.

9. The housing according to claim 4, characterized in that The adhesive comprises at least one of acrylate, epoxy resin, phenolic resin, urea-formaldehyde resin and polyurethane.

10. A method for preparing a shell, characterized in that: The preparation method is used to prepare the housing according to any one of claims 1 to 9, and the preparation method comprises: Provide leather layer; Under a first preset condition, forming an adhesive layer on the inner surface of the leather layer; Under the second preset condition, injection molding is performed so that the injection molding material is mixed with the adhesive of the adhesive layer to form a substrate layer.

11. The method for preparing a housing according to claim 10, characterized in that: Under the first preset condition, forming an adhesive layer on the inner surface of the leather layer comprises: After the adhesive is screen-printed on the inner surface of the leather layer, it is dried at 60-80° C. for 10-20 minutes to solidify the adhesive and form the adhesive layer.

12. The method for preparing a housing according to claim 10, characterized in that: Under the second preset condition, injection molding is performed to mix the injection molding material with the adhesive of the adhesive layer to form a substrate layer, comprising: A protective layer is disposed on a first surface of the adhesive layer away from the leather layer; Placing the leather layer in the mold according to the mold positioning direction; The protective layer is removed, the mold is closed, and injection molding is performed at a mold temperature of 40-110° C. The injection molding raw material is mixed with the adhesive of the adhesive layer to form the substrate layer.

13. The method for preparing a housing according to claim 12, characterized in that: The protective layer includes one of a polyethylene film, a polypropylene film, and a polyvinyl chloride film.

14. The method for preparing a housing according to claim 10, characterized in that: Under the first preset condition, before forming the adhesive layer on the inner surface of the leather layer, the preparation method further comprises: A peelable adhesive layer is formed on the outer surface of the leather layer.

15. The method for preparing a housing according to claim 14, characterized in that: A peelable adhesive layer is formed on the outer surface of the leather layer, comprising: After the peelable adhesive is screen-printed on the outer surface of the leather layer, it is cured under ultraviolet irradiation to form the peelable adhesive layer.

16. An electronic device, characterized in that: The electronic device comprises the housing according to any one of claims 1 to 9.

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