Casing assembly and electronic device

Abstract

The present application provides a casing assembly and an electronic device. The casing assembly comprises a base fabric layer, an adhesive layer, and an anti-fouling coating which are stacked, wherein the anti-fouling coating comprises a first functional layer and a second functional layer, the first functional layer is connected to the adhesive layer, the first functional layer comprises a functional group C=C, and the second functional layer comprises a functional group -Si-H; and the anti-fouling coating further comprises a functional group -Si-C-. In the present application, the casing assembly comprises a base fabric layer, an adhesive layer, and an anti-fouling coating, wherein the adhesive layer is located between the base fabric layer and the anti-fouling coating, so that the anti-fouling coating can be stably adhered to the base fabric layer. In addition, C=C of the first functional layer can react with -Si-H of the second functional layer to form -Si-C-, thereby improving the anti-fouling effect of the anti-fouling coating, increasing the connection stability of the first functional layer and the second functional layer, and reducing the risk of delamination.

Description

A shell assembly and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202410881283.9, filed on July 2, 2024, with the State Intellectual Property Office of China, and the Chinese patent application No. 202410881283.9 has the title of "A shell assembly and electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of electronic devices, and more particularly, to a shell assembly and electronic device. BACKGROUND

[0003] With the development of technology, portable office equipment such as smart phones and tablets have become increasingly popular and have become an essential tool for our daily life and work. However, using the touch screen of the electronic device itself as an input device is prone to fatigue and low input efficiency after a long time of use. As a combination of protection and input device, the leather keyboard is becoming more and more popular with smart electronic devices. Leather as the appearance material of the keyboard can not only improve the appearance quality, but also provide a soft and comfortable touch, improving the product quality.

[0004] Traditional leather, especially light-colored leather, is easily contaminated during use, such as oil stains, sweat stains, and pen stains, which not only affects the appearance of the product, but also is difficult to clean, affecting the subsequent use of the product and the user's experience.

[0005] Currently, in order to avoid contamination of the leather, an anti-stain coating is usually added to the surface of the leather after the single processing of the leather is completed. The coating type is usually inert silicone oil. However, due to the low surface energy characteristics of the inert silicone oil, its bonding force with organic matter such as polyurethane is poor, and problems such as delamination and peeling are prone to occur during use, and the anti-stain effect is not persistent. SUMMARY

[0006] The present application provides a shell assembly and electronic device, which has good anti-stain effect and is not prone to delamination and peeling.

[0007] In a first aspect, a shell assembly is provided, which includes a base cloth layer, an adhesive layer and an anti-stain coating layer arranged in layers; the anti-stain coating layer includes a first functional layer and a second functional layer, the first functional layer is connected with the adhesive layer, the first functional layer includes a functional group C=C, and the second functional layer includes a functional group -Si-H; the anti-stain coating layer further includes a functional group -Si-C-.

[0008] In the embodiments of the present application, the shell assembly includes a base cloth layer, an adhesive layer and an anti-fouling coating layer, the adhesive layer is located between the base cloth layer and the anti-fouling coating layer, so that the anti-fouling coating layer can be stably bonded on the base cloth layer. In addition, the C=C of the first functional layer can react with the -Si-H of the second functional layer to form -Si-C-, which can improve the anti-fouling effect of the anti-fouling coating layer, and at the same time can increase the connection stability of the first functional layer and the second functional layer, so that the stability of the anti-fouling coating layer is better and is not easy to occur delamination peeling.

[0009] In combination with the first aspect, in some implementations of the first aspect, the functional group -Si-C- is located in the first functional layer, and / or the functional group -Si-C- is located in the second functional layer.

[0010] In the embodiments of the present application, the functional group -Si-C- included in the anti-fouling coating layer can be located in the first functional layer, or can be located in the second functional layer, or can exist in the first functional layer and the second functional layer at the same time. It should be understood that the C=C of the first functional layer can react with the -Si-H of the second functional layer to form -Si-C-, therefore, -Si-C- can be detected at the position of the intersection of the first functional layer and the second functional layer, and because of the existence of -Si-C-, the bonding force between the first functional layer and the second functional layer can be increased, so that the stability of the anti-fouling coating layer is better and is not easy to occur delamination peeling.

[0011] In combination with the first aspect, in some implementations of the first aspect, the anti-fouling coating layer further includes a third functional layer, the third functional layer is located between the first functional layer and the second functional layer, and the functional group -Si-C- is located in the third functional layer.

[0012] In the embodiments of the present application, the anti-fouling coating layer can further include a third functional layer, the third functional layer is located between the first functional layer and the second functional layer, in some examples, the third functional layer can be a reaction layer formed by the reaction of the first functional layer and the second functional layer, therefore, the functional group -Si-C- included in the anti-fouling coating layer can be located in the third functional layer. When detecting the anti-fouling coating layer, the first functional layer, the third functional layer and the second functional layer can be detected, the first functional layer can include C=C, the second functional layer can include -Si-H, and the third functional layer can include -Si-C-. Through the third functional layer, the bonding force between the first functional layer and the second functional layer can be increased, so that the stability of the anti-fouling coating layer is better and is not easy to occur delamination peeling.

[0013] In combination with the first aspect, in some implementations of the first aspect, the first functional layer further includes the following functional groups: -NH-CO-O-, -C=O; and the second functional layer further includes the following functional groups: -Si-CH3, -Si-O, CH2=CH-Si-.

[0014] In the embodiments of the present application, the first functional layer can be formed by introducing carbon-carbon double bond (C=C) on the traditional polyurethane chemical molecule (-NH-CO-O-); the second functional layer can include functional groups such as -Si-CH3, -Si-O, CH2=CH-Si-, and the first functional layer and the second functional layer can chemically react. For example, the C=C double bond in the first functional layer can form a silicon-carbon bond (-Si-C-) with Si in the second functional layer under the action of hydrosilylation, thereby increasing the bonding force or adhesion between the first functional layer (containing polyurethane) and the second functional layer (antifouling coating); for another example, in addition to reacting with the C=C double bond in the first functional layer (containing polyurethane), the second functional layer itself can form a three-dimensional network morphology of molecular structure with Si-O as the main chain containing methyl and ethyl groups, thereby forming a cured film, so that the antifouling coating has good stability and wear resistance.

[0015] That is, the present application can realize effective combination of the second functional layer and the first functional layer on the macrostructure and the microchemical bond, greatly improve the bonding force between the second functional layer and the first functional layer under the premise of guaranteeing the antifouling property, and improve the antifouling ability, reliability and wear resistance of the antifouling coating.

[0016] In combination with the first aspect, in some implementations of the first aspect, the silicon element atomic ratio of the first functional layer is between 0-20%, the silicon element atomic ratio of the second functional layer is between 10%-40%, and the silicon element atomic ratio of the third functional layer is between 10%-40%.

[0017] It should be understood that the silicon element atomic ratio of the first functional layer can be 5%, 10%, 15%, 20%; the silicon element atomic ratio of the second functional layer or the third functional layer can be 10%, 15%, 20%, 25%, 30%, 35%, 40%.

[0018] In the embodiments of the present application, the first functional layer, the second functional layer and the third functional layer all contain a certain proportion of silicon, so that the surface of the shell assembly has good antifouling effect. For example, the silicon element atomic ratio of the first functional layer can be between 0-20%, the silicon element atomic ratio of the second functional layer can be between 10%-40%, and the silicon element atomic ratio of the third functional layer can be between 10%-40%.

[0019] In combination with the first aspect, in some implementations of the first aspect, the second functional layer includes a catalyst, a first material and a second material, the first material includes an organosilicon high molecular polymer such as silicone oil, silicone resin or polyorganosiloxane, and the second material includes amino silicone oil or hydrogen-based silicone oil. The second material can include functional group -Si-H.

[0020] Exemplarily, the catalyst can include an inorganic catalyst or an organic catalyst. For example, the catalyst can be platinum salt of divinyltetramethyl disiloxane C8H 18 OPtSi2 product, the raw materials of which are mainly chloroplatinic acid, silicone oil, isomer, tackifier and other materials.

[0021] Exemplarily, the silicone macromolecular polymer is a kind of polymer containing silicon elements, which combines the flexibility of organic groups and the stability of inorganic siloxane structure, and exhibits unique physical and chemical properties. In this application, the silicone macromolecular polymer can include silicone oil, silicone resin or polyorganosiloxane. For example, the first material can be polymethylsiloxane, vinyl silicone oil, crosslinking agent or other functional additives.

[0022] In the embodiments of the present application, the second functional layer can include a catalyst, a first material (such as a silicone macromolecular polymer of silicone oil, silicone resin or polyorganosiloxane) and a second material (such as amino silicone oil or hydrogen-based silicone oil). In the anti-fouling coating treatment, in addition to the reaction of the C=C double bond in the first functional layer, the second functional layer itself can form a three-dimensional network morphology molecular structure with Si-O as the main chain containing methyl and ethyl groups under the action of inorganic catalyst, thereby forming a cured film.

[0023] In combination with the first aspect, in some implementations of the first aspect, the first functional layer can include a silicone macromolecular polymer of silicone oil, silicone resin or polyorganosiloxane.

[0024] In the embodiments of the present application, in order to further improve the bonding force between the second functional layer and the first functional layer, a certain proportion of the first material (such as a silicone macromolecular polymer of silicone oil, silicone resin or polyorganosiloxane) can be mixed into the first functional layer during the processing of the first functional layer. The second functional layer reacts with the coating curing process and the second functional layer added later, so that the second functional layer and the first functional layer are coupled at the macro level, and the adhesion of the second functional layer can be further increased.

[0025] In combination with the first aspect, in some implementations of the first aspect, the molecular structure of the second functional layer and the third functional layer is a three-dimensional network morphology.

[0026] In the embodiments of the present application, the molecular structure of the second functional layer and the third functional layer is a three-dimensional network morphology. Exemplarily, the second functional layer and the third functional layer can have a three-dimensional network morphology molecular structure containing methyl and ethyl groups, so that the second functional layer and the third functional layer have good stability.

[0027] In combination with the first aspect, in some implementations of the first aspect, the dimethylformamide DMF content of the adhesive layer is less than 100 ppm.

[0028] In the embodiments of the present application, the adhesive layer can be upgraded from a traditional wet foaming resin system to a solvent-free chemical system, with the DMF content controlled to be less than 100 ppm, to prevent the reaction of the volatile matter with the anti-fouling coating and thus cause problems such as poisoning.

[0029] In combination with the first aspect, in some implementations of the first aspect, the shell assembly further includes an intermediate resin layer between the adhesive layer and the anti-fouling coating. The intermediate resin layer is made of polyurethane.

[0030] In the embodiments of the present application, by arranging the intermediate resin layer in the shell assembly, the intermediate resin layer is located between the adhesive layer and the anti-fouling coating, which can increase the thickness of the shell assembly and improve the reliability of the shell assembly and the consistency of mass production during processing and manufacturing.

[0031] The second aspect provides a shell assembly including a base cloth layer, an adhesive layer, a protective layer, a connecting layer and an anti-fouling coating arranged in layers; the protective layer includes polyurethane, and the anti-fouling coating includes fluorosilicon resin; the connecting layer is used to increase the bonding force between the protective layer and the anti-fouling coating.

[0032] In the embodiments of the present application, the anti-fouling coating of the shell assembly is fluorosilicon resin, and the anti-fouling ability is further enhanced. In addition, considering that the bonding force between fluorosilicon resin and polyurethane of the protective layer is weak, a connecting layer can be arranged between the anti-fouling coating and the protective layer to increase the bonding force between the protective layer and the anti-fouling coating, so that the surface of the shell assembly has good anti-fouling effect and good stability, and is not prone to problems such as delamination and peeling.

[0033] In combination with the second aspect, in some implementations of the second aspect, the connecting layer includes a first connecting layer and a second connecting layer, the first connecting layer is located between the protective layer and the second connecting layer; the first connecting layer includes a silicon-oxygen coupling agent, and the second connecting layer includes inorganic silicon oxide.

[0034] It should be understood that the silicon-oxygen coupling agent is a kind of organic silicon compound with special structure, which contains groups that can interact with the surface of inorganic materials (such as glass, metal, mineral filler, etc.) and groups that can react or be compatible with organic polymer materials (such as plastics, rubbers, coatings, etc.) in the molecule. The silicon-oxygen coupling agent realizes the effective combination between inorganic and organic materials through the silicon-oxygen (Si-O) bond, and enhances the performance of the composite material, such as improving the bonding strength, improving the weather resistance, increasing the toughness, etc.

[0035] In the embodiments of the present application, the first connecting layer and the second connecting layer can be arranged between the protective layer and the anti-fouling coating, the first connecting layer can be a silicon-oxygen coupling agent, the second connecting layer can be inorganic silicon oxide (such as SiO2), the silicon-oxygen coupling agent can be arranged between the polyurethane and the inorganic silicon oxide, and the inorganic silicon oxide compound can be arranged between the fluorosilicon resin and the silicon-oxygen coupling agent. It should be understood that the silicon-oxygen coupling agent can increase the adhesion between the inorganic silicon oxide and the polyurethane skin material, and the inorganic silicon oxide compound can increase the bonding force between the fluorosilicon resin and the silicon-oxygen coupling agent, so that the shell assembly has good stability and wear resistance.

[0036] In combination with the second aspect, in some implementations of the second aspect, the protective layer further includes a silicon-oxygen coupling agent, and the connecting layer includes inorganic silicon oxide.

[0037] In the embodiments of the present application, the protective layer can include polyurethane and a silicon-oxygen coupling agent, that is, the protective layer can include a mixed material of polyurethane and a silicon-oxygen coupling agent, and the connecting layer can include inorganic silicon oxide (such as SiO2). The silicon-oxygen coupling agent can increase the adhesion between the inorganic silicon oxide and the polyurethane skin material, and the inorganic silicon oxide compound can increase the bonding force between the fluorosilicon resin and the silicon-oxygen coupling agent, so that the shell assembly has good stability and wear resistance.

[0038] In combination with the second aspect, in some implementations of the second aspect, the anti-fouling coating is formed on the side of the connecting layer away from the base cloth layer by a physical vapor deposition (PVD) evaporation method.

[0039] In the embodiments of the present application, the PVD evaporation method can be used for processing the fluorosilicon resin coating, so that the anti-fouling coating is uniformly deposited on the surface of the skin material, the uniformity of the film thickness of the anti-fouling coating is ensured, the original texture of the protective layer (such as polyurethane PU skin material) is reduced to the maximum extent, and the problem of the surface of the skin material caused by excessive processing after conventional coating roller coating in the industry is avoided.

[0040] In combination with the second aspect, in some implementations of the second aspect, the shell assembly further includes an intermediate resin layer, and the intermediate resin layer is located between the adhesive layer and the protective layer.

[0041] In the embodiments of the present application, by arranging the intermediate resin layer in the shell assembly, the intermediate resin layer is located between the adhesive layer and the protective layer (such as polyurethane PU skin material), the thickness of the shell assembly can be increased, and the reliability of the shell assembly and the consistency of mass production during processing and manufacturing can be improved.

[0042] The third aspect provides a shell assembly, which includes a base cloth layer, an adhesive layer and an anti-fouling coating arranged in layers, and the anti-fouling coating includes a silicon resin, a polyorganosiloxane and an organic silicon high polymer.

[0043] In the embodiments of the present application, the anti-fouling organic silicone resin (or organic silicone polymer) can be used to replace the original polyurethane PU leather and the anti-fouling coating, the anti-fouling coating coating process can be omitted, the processing procedure of the shell assembly can be simplified, the cost can be reduced, and the anti-fouling function of the leather / shell assembly can be improved.

[0044] In combination with the third aspect, in some implementations of the third aspect, the anti-fouling coating includes a polysiloxane polymer. For example, the polysiloxane polymer is a polymer family with a silicon-oxygen chain (-Si-O-Si-) as the main skeleton and a methyl (-CH3) group connected to the silicon atom, such as polydimethylsiloxane (PDMS).

[0045] In combination with the third aspect, in some implementations of the third aspect, the shell assembly further includes an intermediate resin layer, and the intermediate resin layer is located between the adhesive layer and the anti-fouling coating.

[0046] In the embodiments of the present application, by arranging the intermediate resin layer between the adhesive layer and the protective layer (such as the polyurethane PU leather) in the shell assembly, the thickness of the shell assembly can be increased, and the reliability of the shell assembly and the consistency of mass production during processing and manufacturing can be improved.

[0047] In combination with the third aspect, in some implementations of the third aspect, the surface of the anti-fouling coating away from the base cloth layer has a textured structure.

[0048] In the embodiments of the present application, the surface of the anti-fouling coating has a textured structure, for example, the anti-fouling coating can be scraped with release paper, and the anti-fouling organic silicone resin can be used as the surface layer material of the PU leather, which can achieve the effects of texture and anti-fouling.

[0049] The fourth aspect provides an electronic device including the shell assembly in any of the implementations of the first aspect to the third aspect.

[0050] For example, the electronic device can include a middle frame, a display screen, and a back cover, the back cover and the display screen are respectively connected to two opposite sides of the middle frame, and the back cover includes the shell assembly in any of the implementations of the first aspect to the third aspect.

[0051] Exemplarily, the electronic device can include a keyboard body, a first support, a second support, the first support being connected with the second support, the first support being used for fitting the back of the electronic device, the second support being rotated at a certain angle relative to the first support and forming a first included angle with the back of the electronic device, the second support being connected with the keyboard body, and the connecting member being used for forming electrical connection with the electronic device. The first support and / or the second support can include the shell assembly as in any one of the implementations of the first aspect to the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0052] FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present application.

[0053] FIG. 2 is a schematic diagram of a cross section of a shell assembly according to an embodiment of the present application.

[0054] FIG. 3 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0055] FIG. 4 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0056] FIG. 5 is a schematic diagram of an example of material reaction according to an embodiment of the present application.

[0057] FIG. 6 is a schematic diagram of another example of material reaction according to an embodiment of the present application.

[0058] FIG. 7 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0059] FIG. 8 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0060] FIG. 9 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0061] FIG. 10 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application.

[0062] FIG. 11 is a schematic diagram of a cross section of another shell assembly according to an embodiment of the present application. DETAILED DESCRIPTION

[0063] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0064] In the embodiments of the present application, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can intelligently or implicitly include one or more features. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two, "at least one" and "one or more" means one, two or more than two. The singular expressions "one", "a kind", "the", "the above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates the contrary. The size of the serial number of each process below does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. For example, in the embodiments of the present application, "110", "120", "130" and the like are only made for the convenience of description, and do not limit the order of execution steps.

[0065] In the present specification, the reference to "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "including but not limited to", unless otherwise specifically emphasized.

[0066] In the description of the embodiments of the present application, the terms "upper", "lower" and the like indicate the orientation or position relationship defined with respect to the orientation or position of the components shown in the drawings. It should be understood that these directional terms are relative concepts, which are used for relative description and clarification, and do not indicate or imply that the device or component must have a specific orientation or be constructed and operated in a specific orientation, which can be changed accordingly according to the orientation of the components placed in the drawings, therefore it cannot be understood as a limitation of the present application.

[0067] With the development of science and technology, portable office equipment such as smart phones and tablet computers have become more and more popular and have become an essential tool for our life and work. However, using the touch screen of the electronic device itself as an input device is easy to fatigue and has low input efficiency after a long time of use. The leather keyboard, as a combination of protection and input device with smart electronic devices, is becoming more and more common. Leather as the appearance material of the keyboard can not only improve the appearance quality, but also provide soft and comfortable hand feeling and improve product quality.

[0068] Traditional leather, especially light-colored leather, is prone to contamination during use, such as oil stains, sweat stains, pen stains, and the like, which not only affects the appearance of the product, but also is difficult to clean, affecting the subsequent use of the product and the user experience.

[0069] Currently, in order to avoid contamination of the leather, an anti-stain coating is usually added to the surface of the leather after the single processing of the leather is completed. The coating type is usually inert silicone oil or reactive silicone oil, and the chemical composition is usually polydimethylsiloxane (PDMS) substance, and the chemical formula can be simplified as (C2H6OSi)n. The main anti-stain principle is to realize the anti-stain effect of water-based dirt and oily dirt through the hydrophobicity and low surface energy characteristics of polydimethylsiloxane. However, due to the low surface energy characteristics of the inert silicone oil itself, the combination with organic matters such as polyurethane (PU) is poor, and it is only adsorbed on the surface of the leather by van der Waals force, so that problems such as delamination and peeling are prone to occur during use, and the anti-stain effect is poor in persistence. This scheme usually uses a doctor blade to perform coating, and the coating is thick, which affects the thickness, surface texture and texture of the leather itself.

[0070] Therefore, the shell assembly and the electronic device provided in the embodiments of the present application can be applied to the electronic device, and the surface of the shell assembly can adopt the leather provided in the present application, so that the surface of the shell assembly has good anti-stain effect and is not prone to delamination and peeling.

[0071] It should be understood that the electronic device provided in the present application can be a tablet computer, a mobile phone, an electronic reader, a remote controller, a notebook computer, a personal computer (PC), a personal digital assistant (PDA), a vehicle-mounted device, a network television, a wearable device, a television, and the like, which are products with a display interface, and smart watches, smart bracelets, and the like, which are smart display wearable products. The embodiments of the present application do not specially limit the form of the above-mentioned electronic device. The following embodiments are exemplarily described by taking the electronic device as a tablet computer for convenience.

[0072] FIG. 1 is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0073] As shown in FIG. 1, the electronic device 100 can include an electronic product 110 and a protective shell 120, and the electronic product 110 can be supported on the protective shell 120 and form an electrical connection with the protective shell 120. At this time, the user can input on the electronic product 110 through the keyboard of the protective shell 120. The user can also remove the electronic product 110 from the protective shell 120.

[0074] For example, the electronic product 110 can have a plate-shaped appearance structure, and the electronic product 110 includes but is not limited to a tablet computer, a mobile phone, and the like.

[0075] As shown in FIG. 1, the protective shell 120 can include a support part and a keyboard part, which can be connected together or separated, that is, the protective shell 120 has a split design. The support part can position and support the electronic product 110, and the keyboard part can be electrically connected with the electronic product 110.

[0076] The support part can include a first support 121 and a second support 122, and the first support 121 and the second support 122 are rotationally connected. The first support 121 and the second support 122 can be substantially plate-shaped. The second support 122 can be rotated at a certain angle relative to the first support 121 and supported on a table top (for example, a desktop), so that the support part is in a supported state.

[0077] The keyboard part can include a keyboard body 123, and the keyboard body 123 can include a key core 1231 and a keyboard connecting area 1232. The keyboard connecting area 1232 is connected with the key core 1231, and the keyboard connecting area 1232 can also be connected with the second support 122. That is, the keyboard connecting area 1232 can be connected between the key core 1231 and the second support 122, and the key core 1231 can include a plurality of keys.

[0078] In some embodiments, the keyboard body 123 can also include a touchpad for user touch input.

[0079] It should be noted that the protective shell 120 can adopt the leather / housing assembly provided in the present application, so that the surface of the protective shell 120 has good anti-fouling effect and is not prone to delamination and peeling, and the structure of the housing assembly will be described in detail below in conjunction with FIGS. 2 to 9.

[0080] It should be understood that the leather / housing assembly provided in the embodiments of the present application can also be applied to other textile product anti-fouling treatment products, and can also be applied to other products with leather products or with housings, such as furniture, luggage, interior decoration, watchbands, and the like, which are not limited in the present application.

[0081] FIGS. 2 to 4 are cross-sectional schematic views of a type of housing assembly provided in the embodiments of the present application. The housing assembly 200 can be applied to the electronic device 100 or other products described above.

[0082] As shown in FIGS. 2 and 3, the housing assembly 200 can include a base cloth layer 210, an adhesive layer 220, and an anti-fouling coating layer 230 arranged in layers.

[0083] The base cloth layer 210 can serve to support the base, and can be made of fiber, polyester, nylon, cotton fiber, etc. For example, the thickness of the base cloth layer 210 can be between 0.2 mm and 0.38 mm.

[0084] The adhesive layer 220 can be referred to as an adhesive layer resin, and can be made of polyurethane. The adhesive layer 220 mainly serves to bond the upper and lower layers. For example, the thickness of the adhesive layer 220 can be between 0.02 mm and 0.05 mm.

[0085] It should be understood that in the present application, the adhesive layer resin can be upgraded from a conventional wet foaming resin system to a solvent-free chemical system. For example, the content of dimethylformamide (DMF) in the adhesive layer 220 can be controlled to be less than 100 ppm to prevent the volatile matter from reacting with the anti-fouling coating 230, thereby causing coating poisoning.

[0086] In some examples, as shown in FIG. 2, the anti-fouling coating 230 includes a modified surface layer 231 and a modified coating layer 232, the modified surface layer 231 is connected with the adhesive layer 220, the modified surface layer 231 includes a functional group C=C, and the modified coating layer 232 includes a functional group -Si-H; the anti-fouling coating 230 further includes a functional group -Si-C-. Among them, the modified surface layer 231 is the first functional layer, and the modified coating layer 232 is the second functional layer.

[0087] It should be understood that the C=C included in the modified surface layer 231 can chemically react with the -Si-H included in the modified coating layer 232 to form -Si-C-, which can improve the anti-fouling effect of the anti-fouling coating, and at the same time can increase the connection stability of the modified surface layer 231 and the modified coating layer 232, so that the stability of the anti-fouling coating 230 is better, and is not easy to delaminate and peel off.

[0088] For example, the functional group -Si-C- included in the anti-fouling coating 230 can be located in the first functional layer (i.e., the modified surface layer 231), or in the second functional layer (i.e., the modified coating layer 232), or can exist in both the first functional layer (i.e., the modified surface layer 231) and the second functional layer (i.e., the modified coating layer 232).

[0089] It should be understood that the modified surface layer 231 can chemically react with the modified coating layer 232 to form -Si-C-, so -Si-C- can be detected at the interface between the modified surface layer 231 and the modified coating layer 232, -Si-C- can be located in the modified surface layer 231, and / or -Si-C- can be located in the modified coating layer 232. That is, materials containing the functional group -Si-C- can be detected in the modified surface layer 231 and / or the modified coating layer 232.

[0090] In some examples, as shown in FIG. 3, the anti-fouling coating 230 can include a modified surface layer 231, a reaction layer 233, and a modified coating layer 232 arranged in a stack, with the modified surface layer 231 connected to the adhesive layer 220. That is, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the modified surface layer 231, the reaction layer 233, and the modified coating layer 232 arranged in a stack. Among them, the modified surface layer 231 is the first functional layer, the reaction layer 233 is the third functional layer, and the modified coating layer 232 is the second functional layer.

[0091] The modified surface layer 231 can be referred to as a modified surface layer resin, which is mainly formed by introducing a carbon-carbon double bond into a conventional polyurethane (PU) chemical molecule. For example, the modified surface layer 231 can include the following functional groups: polyurethane (-NH-CO-O-), carbonyl (-C=O), carbon-carbon double bond (C=C). For example, the silicon element atomic ratio of the modified surface layer 231 is between 0-20%, for example, the silicon element atomic ratio of the modified surface layer 231 can be 5%, 10%, 15%, 20%.

[0092] The reaction layer 233 can be located between the modified surface layer 231 and the modified coating layer 232, and the reaction layer 233 can include the following functional groups: silicon-carbon bond (-Si-C-), silicon-oxygen bond (-Si-O-). It should be understood that the reaction layer 233 can be considered as an intermediate resin layer generated by the chemical reaction of the modified surface layer 231 and the modified coating layer 232. For example, the silicon element atomic ratio of the reaction layer 233 is between 10%-40%, for example, the silicon element atomic ratio of the reaction layer 233 can be 10%, 15%, 20%, 25%, 30%, 35%, 40%.

[0093] The modified coating layer 232 can be referred to as a modified silicone resin coating layer, and the modified coating layer 232 is a type of reaction silicone resin. For example, the modified coating layer 232 can include the following functional groups: silicon methyl (-Si-CH3), silicon-oxygen bond (-Si-O-), silicon-hydrogen bond (-Si-H), vinyl silicon (CH2=CH-Si-).

[0094] For example, the second functional layer (i.e., the modified coating layer 232) can include a catalyst, a first material, and a second material. Among them, the catalyst can be an inorganic catalyst or an organic catalyst, for example, the catalyst can be diethylenetetramethyldisiloxane platinum salt C8H 18The OPtSi2 product is mainly made of chloroplatinic acid, silicone oil, isomer, tackifier and other materials. The first material can include silicone polymers of silicone oil, silicone resin or polyorganosiloxane, and the first material can be an organic silicon polymer with Si-O as the main chain. For example, the first material can be polymethylsiloxane, vinyl silicone oil, crosslinking agent and other functional additives. The second material can include amino silicone oil or hydrogen silicone oil.

[0095] It should be understood that the organic silicon polymer is a polymer containing silicon elements, which combines the flexibility of organic groups and the stability of inorganic siloxane structure, and exhibits unique physical and chemical properties. In this application, the organic silicon polymer can include silicone oil, silicone resin or polyorganosiloxane. For example, the first material can be polymethylsiloxane, vinyl silicone oil, crosslinking agent or other functional additives.

[0096] For example, the atomic proportion of silicon elements in the modified coating 232 is between 10% and 40%. For example, the atomic proportion of silicon elements in the modified coating 232 can be 10%, 15%, 20%, 25%, 30%, 35%, 40%.

[0097] It should be noted that the atomic proportion of Si elements in each coating in the embodiments of the present application can be detected by energy dispersive spectroscopy (EDS). For example, the composition of the reaction layer 233 and the modified coating 232 can be inspected by ESD, and the atomic proportion of Si elements can be between 10% and 40%; for example, the composition of the modified surface layer 231 can be inspected by ESD, and the atomic proportion of Si elements can be between 0 and 20%.

[0098] It should be noted that during the curing process of the anti-fouling coating 230, the C=C double bond of the modified surface layer 231 can form Si-C bonds with Si in the modified coating 232 (silicone resin) under the action of the silicon hydrogen addition of the modified coating 232, thereby increasing the bonding force between the modified surface layer 231 and the modified coating 232. In some examples, there is no obvious reaction layer 233 formed by chemical reaction between the modified surface layer 231 and the modified coating 232, that is, there is no obvious boundary / layer between the reaction layer 233 and the modified surface layer 231, or between the reaction layer 233 and the modified coating 232, but Si-C bonds can be detected at the junction of the modified surface layer 231 and the modified coating 232. In other examples, when the shell assembly 200 is sliced, it can be detected that the modified surface layer 231 and the modified coating 232 have a reaction layer 233 between them, which can be obtained by chemical reaction of the modified surface layer 231 and the modified coating 232, that is, Si-C bonds can be detected in the reaction layer 233.

[0099] As shown in FIG. 5, FIG. 5 shows a schematic diagram of the chemical reaction of the modified surface layer 231 and the modified coating 232 to form Si-C bonds.

[0100] The modified surface layer 231 can include -NH-CO-O-, C=C, -C=O, and the like functional groups, wherein polyurethane (PU) is a high molecular material composed of soft chains (or soft segments) and hard chains (or hard segments), the soft chains are mainly polyol chains, which can be polyester, polyether, polycarbonate polyol, and the like, and the hard chains are mainly isocyanate.

[0101] The modified coating 232 can include -Si-H functional groups. When the modified surface layer 231 reacts with the modified coating 232, the -Si-H bonds of the modified coating 232 can form Si-C bonds with the C=C of the modified surface layer 231, which can achieve effective bonding of the modified coating 232 and the modified surface layer 231 in macroscopic structure and microscopic chemical bonds, greatly improve the bonding force between the modified coating 232 and the modified surface layer 231 under the premise of ensuring the anti-fouling property, thereby improving the anti-fouling ability, reliability, and wear resistance of the anti-fouling coating 230.

[0102] It should be noted that the modified coating 232 includes a catalyst, a first material, and a second material. In addition to the reaction between the C=C in the modified surface layer 231 and the modified coating 232, the first material and the second material can react under the action of the catalyst to form a three-dimensional network molecular structure with Si-O as the main chain and containing methyl and ethyl groups, thereby forming a cured film on the surface of the modified coating 232.

[0103] As shown in FIG. 6, FIG. 6 shows a schematic diagram of the modified coating 232 reacting to form a three-dimensional network morphology molecular structure containing methyl and ethyl groups with Si-O as the main chain.

[0104] The first material of the modified coating 232 can be a vinyl silicone oil, and the second material of the modified coating 232 can be a hydrogen-based silicone oil. The modified surface layer 231 can include soft chains, hard chains, C=C, -C=O, and other functional groups. Under the action of a catalyst, the three can form a polymethylsiloxane resin. The polymethylsiloxane resin is a three-dimensional network morphology molecular structure containing a silicon methyl group (-Si-CH3) with Si-O as the main chain. That is, a stable molecular structure can be formed in the modified coating 232, thereby enabling the surface of the anti-fouling coating 230 to have good stability and wear resistance.

[0105] It should be noted that the anti-fouling coating and the surface layer resin of the existing leather both belong to inert molecules, and there is neither macroscopic structural combination nor microscopic chemical bond combination between them. The coating adhesion is only the Van der Waals force between molecules, and the coating adhesion is poor, and the coating is easy to separate. In the present application, by providing a modified surface layer resin and a modified silicone resin coating, the surface adhesion of the anti-fouling coating is further enhanced without affecting the reliability of the leather itself.

[0106] In some examples, the modified surface layer 231 can include silicone polymers such as silicone oils, silicone resins, or polyorganosiloxanes. In order to further improve the bonding force between the modified coating 232 and the modified surface layer 231, a certain proportion of the first material (such as silicone polymers such as silicone oils, silicone resins, or polyorganosiloxanes) can be mixed into the modified surface layer 231 during the processing of the modified surface layer 231. Due to the difference in coating curing conditions and catalyst systems, the original properties are maintained during the curing process of the modified surface layer 231. After the addition of the modified coating 232, the modified coating 232 will react under the action of the catalyst of the modified coating 232, so that the modified coating 232 and the modified surface layer 231 are coupled at the macroscopic level, and the adhesion of the modified coating 232 is further increased.

[0107] In some examples, the molecular structure of the reaction layer 233 and the modified coating 232 can be a three-dimensional network morphology. For example, the reaction layer 233 and the modified coating 232 can be a three-dimensional network morphology molecular structure containing methyl and ethyl groups, thereby enabling the reaction layer 233 and the modified coating 232 to have good stability.

[0108] In some examples, as shown in FIG. 4, the shell assembly 200 can further include an intermediate resin layer 240. For example, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the intermediate resin layer 240, the anti-fouling coating layer 230 arranged in a stack. For another example, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the intermediate resin layer 240, the modified surface layer 231, the reaction layer 233, and the modified coating layer 232 arranged in a stack.

[0109] It should be understood that the material of the intermediate resin layer 240 can be polyurethane. It should be understood that by arranging the intermediate resin layer 240 in the shell assembly 200, the intermediate resin layer 240 is located between the adhesive layer 220 and the anti-fouling coating layer 230, which can increase the thickness of the shell assembly 200, improve the reliability of the shell assembly 200, and the consistency of mass production when processing and manufacturing.

[0110] In some examples, the modified coating layer 232 can be formed on the side of the modified surface layer 231 away from the base cloth layer 210 by a roll coating process. For example, the side of the modified surface layer 231 away from the base cloth layer 210 can be scraped with a release paper. It should be understood that the release paper is also called release paper or silicone paper, which is a kind of paper coated with a special coating (usually silicone) on the surface. By scraping the surface of the modified surface layer 231 with the release paper, the surface texture of the modified surface layer 231 can be ensured, so that the surface texture of the shell assembly 200 can be ensured.

[0111] FIGS. 7-9 are cross-sectional schematic views of another type of shell assembly provided by the embodiments of the present application. The shell assembly 200 can be applied to the electronic device 100 or other products described above.

[0112] As shown in FIG. 7, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the protective layer 310, the connecting layer 320, and the anti-fouling coating layer 330 arranged in a stack. The protective layer 310 includes polyurethane, and the anti-fouling coating layer 330 includes fluorosilicone resin. The connecting layer 320 is used to increase the bonding force between the protective layer 310 and the anti-fouling coating layer 330. The related descriptions of the base cloth layer 210 and the adhesive layer 220 can be referred to the related descriptions in FIGS. 2 and 3, which will not be repeated here.

[0113] That is, the protective layer 310 can be made of polyurethane, and the anti-fouling coating layer 330 can be made of fluorosilicone resin. Considering that polyurethane and fluorosilicone resin belong to different systems of resin and have stable chemical properties and are not easy to react, in order to improve the surface adhesion of fluorosilicone resin and polyurethane, the connecting layer 320 can be arranged between the protective layer 310 and the anti-fouling coating layer 330 to increase the bonding force between the protective layer 310 and the anti-fouling coating layer 330, so that the surface of the shell assembly 200 has good anti-fouling effect and good stability, and is not easy to cause delamination and peeling problems.

[0114] It should be understood that the fluorosilicone resin has the characteristics of colorless and transparent, low surface energy and inert, and the fluorosilicone resin attached to the surface of the PU leather has the anti-fouling property, and the anti-fouling ability is further enhanced.

[0115] In some examples, the protective layer 310 further includes a silane coupling agent, and the connecting layer 320 includes inorganic silicon oxide. That is, the protective layer 310 can include polyurethane and a silane coupling agent, that is, the protective layer 310 can include a mixed material of polyurethane and a silane coupling agent, the connecting layer 320 can include inorganic silicon oxide (such as SiO2), and the silane coupling agent can increase the adhesion between the inorganic silicon oxide and the polyurethane leather; the inorganic silicon oxide can increase the binding force between the fluorosilicone resin and the silane coupling agent, so that the shell assembly 200 has good stability and wear resistance.

[0116] In some examples, as shown in FIG. 8, the connecting layer 320 includes a first connecting layer 321 and a second connecting layer 322, and the first connecting layer 321 is located between the protective layer 310 and the second connecting layer 322; the first connecting layer 321 includes a silane coupling agent, and the second connecting layer 322 includes inorganic silicon oxide (such as silicon dioxide).

[0117] It should be understood that the silane coupling agent is a kind of organic silicon compound with special structure, which contains groups that can interact with the surface of inorganic materials (such as glass, metal, mineral filler, etc.) and groups that can react or compatible with organic polymer materials (such as plastics, rubber, paint, etc.) in the molecule. The silane coupling agent realizes the effective combination between inorganic and organic materials through the silicon-oxygen (Si-O) bond, and enhances the performance of the composite material, such as improving the bonding strength, improving the weather resistance, increasing the toughness, etc.

[0118] The first connecting layer 321 and the second connecting layer 322 can be arranged between the protective layer 310 and the anti-fouling coating layer 330, the first connecting layer 321 can be a silane coupling agent, and the second connecting layer 322 can be inorganic silicon oxide (such as SiO2), the silane coupling agent can be arranged between the polyurethane and the inorganic silicon oxide, and the inorganic silicon oxide compound can be arranged between the fluorosilicone resin and the silane coupling agent. It should be understood that the silane coupling agent can increase the adhesion between the inorganic silicon oxide and the polyurethane leather; the inorganic silicon oxide compound can increase the binding force between the fluorosilicone resin and the silane coupling agent, so that the shell assembly 200 has good stability and wear resistance.

[0119] In some examples, the anti-fouling coating layer 330 can be formed on the side of the connecting layer 320 away from the base cloth layer 210 by a roll coating process, or the anti-fouling coating layer 330 can be formed on the side of the connecting layer 320 away from the base cloth layer 210 by a physical vapor deposition (PVD) evaporation method.

[0120] It should be understood that, by using the PVD evaporation method to process the fluorosilicone resin coating, the anti-fouling coating 330 is uniformly deposited on the surface of the leather, ensuring the uniformity of the film thickness of the anti-fouling coating 330, and minimizing the influence of the original texture of the protective layer 310 (such as polyurethane PU leather) after the conventional coating roll coating process.

[0121] In some examples, as shown in FIGS. 8 and 9, the shell assembly 200 can further include an intermediate resin layer 240 located between the adhesive layer 220 and the protective layer 310. For example, as shown in FIG. 8, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the intermediate resin layer 240, the protective layer 310, the first connecting layer 321, the second connecting layer 322, and the anti-fouling coating 330 arranged in layers. For another example, as shown in FIG. 9, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the intermediate resin layer 240, the protective layer 310, the connecting layer 320, and the anti-fouling coating 330 arranged in layers.

[0122] It should be understood that the material of the intermediate resin layer 240 can be polyurethane. It should be understood that, by providing the intermediate resin layer 240 in the shell assembly 200, the intermediate resin layer 240 is located between the adhesive layer 220 and the protective layer 310 (such as polyurethane PU leather), which can increase the thickness of the shell assembly 200, improve the reliability of the shell assembly 200, and improve the consistency of mass production during processing and manufacturing.

[0123] In some examples, the anti-fouling coating 330 can be formed on the side of the connecting layer 320 away from the base cloth layer 210 by a roll coating process. For example, the side of the protective layer 310 away from the base cloth layer 210 can be scraped with a release paper. It should be understood that the release paper is also called release paper or silicone oil paper, which is a kind of paper coated with a special coating (usually silicone resin) on the surface. By scraping the surface of the protective layer 310 with the release paper, the surface texture of the protective layer 310 can be ensured, so that the surface texture of the shell assembly 200 can be ensured.

[0124] FIGS. 10 and 11 are cross-sectional schematic views of another type of shell assembly provided by the embodiments of the present application. The shell assembly 200 can be applied to the electronic device 100 or other products described above.

[0125] As shown in FIG. 10, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, and the anti-fouling mixed coating layer 410 arranged in layers. The anti-fouling mixed coating layer 410 includes silicone-based, polyorganosiloxane-based organic silicon polymer.

[0126] It should be understood that in this embodiment, the anti-fouling hybrid coating 410 (a silicone polymer) can be used to replace the original polyurethane PU leather and the anti-fouling coating, which is equivalent to combining the original polyurethane PU leather and the anti-fouling coating into one layer, and the anti-fouling coating coating process can be omitted, thereby simplifying the processing procedure of the shell assembly and reducing the cost, and at the same time, the anti-fouling function of the leather / shell assembly can be improved.

[0127] For example, the anti-fouling hybrid coating 410 can include a polysiloxane polymer. For example, the polysiloxane polymer is a polymer family with a silicon-oxygen chain (-Si-O-Si-) as the main skeleton and methyl (-CH3) groups connected to the silicon atoms, such as polydimethylsiloxane (PDMS).

[0128] For example, the surface of the anti-fouling hybrid coating 410 away from the base cloth layer 210 has a textured structure. It should be understood that in the current processing method, the anti-fouling coating is usually coated on the surface of the PU leather surface layer resin by using a coating roller or a PVD evaporation process, and the anti-fouling coating can cover the texture on the surface of the PU leather surface layer resin, thereby affecting the appearance and feel of the shell assembly. In the present application, the anti-fouling coating coating process can be omitted, the anti-fouling hybrid coating 410 can be used to replace the original polyurethane PU leather and the anti-fouling coating, and the anti-fouling hybrid coating 410 can be used for scraping with release paper, the anti-fouling hybrid coating 410 can be used as the surface layer material of the PU leather, and the texture of the release paper can be one-to-one restored, and the texture and anti-fouling effect can be considered.

[0129] In some examples, as shown in FIG. 11, the shell assembly 200 can further include an intermediate resin layer 240 between the adhesive layer 220 and the anti-fouling hybrid coating 410. For example, the shell assembly 200 can include the base cloth layer 210, the adhesive layer 220, the intermediate resin layer 240, and the anti-fouling hybrid coating 410 arranged in layers.

[0130] It should be understood that the material of the intermediate resin layer 240 can be polyurethane. It should be understood that by arranging the intermediate resin layer 240 between the adhesive layer 220 and the anti-fouling hybrid coating 410 in the shell assembly 200, the thickness of the shell assembly 200 can be increased, and the reliability of the shell assembly 200 and the consistency of mass production during processing and manufacturing can be improved.

[0131] Exemplarily, in the specific processing, firstly, the anti-fouling mixed coating 410 can be used for scraping with the release paper, the silicone polymer is used as the surface layer material of the PU leather, and the texture and the anti-fouling effect are considered; secondly, the middle resin layer 240 can be scraped, and the main function is that it can be coupled with the base cloth adhesive layer resin (i.e. the adhesive layer 220), so that the PU leather has better structural stability as a whole; finally, the base cloth adhesive layer resin (i.e. the base cloth layer 210) can be scraped, the processed surface layer resin is combined with the bottom base cloth to form a complete leather, and finally the shell assembly 200 shown in FIG. 10 is obtained.

[0132] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A housing assembly, characterized by, The base cloth layer, the adhesive layer and the anti-fouling coating are arranged in a stack; The anti-fouling coating comprises a first functional layer and a second functional layer, the first functional layer is connected with the adhesive layer, the first functional layer comprises a functional group C=C, and the second functional layer comprises a functional group -Si-H. The anti-fouling coating further comprises a functional group -Si-C-.

2. The housing assembly of claim 1, wherein, The functional group -Si-C- is located in the first functional layer, and / or the functional group -Si-C- is located in the second functional layer.

3. The housing assembly of claim 1, wherein, The anti-fouling coating further comprises a third functional layer, the third functional layer is located between the first functional layer and the second functional layer, and the functional group -Si-C- is located in the third functional layer.

4. The shell assembly according to any one of claims 1 to 3, wherein The first functional layer further comprises the following functional groups: -NH-CO-O-, -C=O; The second functional layer further comprises the following functional groups: -Si-CH3, -Si-O-, CH2=CH-Si-.

5. The housing assembly of any one of claims 1 to 4, wherein, The atomic proportion of silicon elements in the first functional layer is between 0-20%, and the atomic proportion of silicon elements in the second functional layer is between 10%-40%.

6. The housing assembly of any one of claims 1 to 5, wherein, The second functional layer comprises a catalyst, a first material and a second material, the first material comprises an organosilicon high molecular polymer of a silicone oil type, a silicone resin type or a polyorganosiloxane type, and the second material comprises an amino silicone oil or a hydrogen-based silicone oil.

7. The housing assembly of any one of claims 1 to 6, wherein, The first functional layer comprises an organosilicon high molecular polymer of a silicone oil type, a silicone resin type or a polyorganosiloxane type.

8. The housing assembly of any one of claims 1-7, wherein, The molecular structure of the second functional layer is a three-dimensional network form.

9. The housing assembly of any one of claims 1 to 8, wherein, The dimethylformamide (DMF) content of the adhesive layer is less than 100 ppm.

10. The housing assembly of any one of claims 1 to 9, wherein, The shell assembly further comprises an intermediate resin layer, the intermediate resin layer is located between the adhesive layer and the anti-fouling coating.

11. A housing assembly characterized by, The base cloth layer, the adhesive layer, the protective layer, the connecting layer and the anti-fouling coating are arranged in a stack; The protective layer comprises polyurethane, and the anti-fouling coating comprises fluorosilicone resin. The connecting layer is used to increase the bonding force between the protective layer and the anti-fouling coating.

12. The housing assembly of claim 11, wherein, The connecting layer comprises a first connecting layer and a second connecting layer, the first connecting layer is located between the protective layer and the second connecting layer; The first connecting layer comprises a siloxane coupling agent, and the second connecting layer comprises inorganic silicon oxide.

13. The housing assembly of claim 11, wherein, The protective layer further comprises a siloxane coupling agent, and the connecting layer comprises inorganic silicon oxide.

14. The housing assembly of any one of claims 11 to 13, wherein, The anti-fouling coating is formed on the side of the connecting layer away from the base cloth layer by a physical vapor deposition (PVD) evaporation method.

15. The housing assembly of any one of claims 11 to 13, wherein, The shell assembly further comprises an intermediate resin layer, the intermediate resin layer is located between the adhesive layer and the protective layer.

16. An electronic device, comprising: The shell assembly comprises the shell assembly according to any one of claims 1 to 15.

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