Electronic equipment shell assembly and electronic equipment

Abstract

The invention provides an electronic equipment shell assembly which comprises a base material, the surface of the base material comprises a first area and a second area which are connected with each other; the first area is provided with a first paint layer, and the surface of the first paint layer is provided with a loop-shaped texture structure formed by a plurality of micron-sized folds; the second area is provided with a second paint layer, and the glossiness of the surface of the second paint layer is different from that of the surface of the first paint layer. The invention further provides a preparation method of the electronic equipment shell assembly and electronic equipment comprising the electronic equipment shell assembly. The first paint layer with the loop-shaped texture structure formed by the multiple micron-sized folds on the surface serves as the matte layer, the second paint layer and the first paint layer can be cured at the same time through the specific forming mode of the first paint layer, the surface of the electronic equipment shell assembly shows the appearance with different effects, meanwhile, the segment difference between the first paint layer and the second paint layer is small or does not exist, and the appearance is attractive. And the appearance of the product is not influenced by unclear boundary caused by mutual diffusion.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an electronic device housing assembly and an electronic device. Background Art

[0002] With the increasing variety of computer, communication and consumer electronic products (3C products), consumers have more demands on the appearance of electronic products, such as using different materials to splice the appearance, or using the same material but different processes to prepare the spliced ​​appearance, or preparing the same light but different colors, or the same gloss or matte appearance. Summary of the Invention

[0003] Based on this, the present application provides an electronic device housing assembly and an electronic device. The surface of the electronic device housing assembly provided by the present application can achieve appearance effects with different glossiness on the surface of the electronic device housing, can ensure the consistency of the glossy surface and matte surface or the matte surface and super matte surface, and there is no step difference at the joints of different appearance effects.

[0004] The present application provides an electronic device housing assembly, comprising:

[0005] A substrate, wherein a surface of the substrate includes a first region and a second region connected to each other;

[0006] The first area is provided with a first paint layer, and the surface of the first paint layer has a loop-shaped texture structure formed by a plurality of micron-scale wrinkles;

[0007] The second region is provided with a second paint layer, and the glossiness of the surface of the second paint layer is different from the glossiness of the surface of the first paint layer.

[0008] This application utilizes a first paint layer with a loop-like texture formed by multiple micron-scale wrinkles on its surface as the matte layer. This specific formation method allows the second paint layer to cure simultaneously with it, resulting in a minimal or non-existent step difference between the two layers. This prevents cross-diffusion, resulting in unclear boundaries and affecting the product's appearance. Furthermore, the different gloss levels of the first paint layer 1021 and the second paint layer 1022 give the electronic device housing assembly a different appearance, achieving a diverse aesthetic. Furthermore, the loop-like texture formed by multiple micron-scale wrinkles on the surface of the first paint layer provides a skin-friendly feel, enhancing the consumer experience.

[0009] In some specific implementations, the glossiness of the surface of the second paint layer can be higher than that of the surface of the first paint layer, forming a splicing of high gloss, glossy, semi-gloss or flat gloss with matte, or forming a splicing of different matte and matte to obtain a diverse appearance.

[0010] In some specific implementations, the second paint layer and the first paint layer have the same thickness, and there is no step difference at the joint between the two, which will not cause the problem of scratching hands and is more beautiful.

[0011] In some specific implementations, the first paint layer is formed from an excimer paint composition comprising: 30-40 wt% of an excimer resin; 15-25 wt% of a UV high-functionality resin; 5-10 wt% of a yellowing-resistant resin; 4-8 wt% of a UV monomer; 1-3 wt% of a photoinitiator; 10-20 wt% of a solvent; 1-3 wt% of an additive; and 3-6 wt% of a matting agent. The first paint layer formed from the excimer paint composition has a low gloss, exhibits a matte finish, and has good substrate bonding performance.

[0012] In some specific implementations, the second paint layer is formed from a clearcoat composition comprising: 20-35 wt% of a UV high-functionality resin; 10-25 wt% of a UV low-functionality resin; 1-5 wt% of a UV monomer; 2-4 wt% of a photoinitiator; 1-3 wt% of a leveling agent; 20-30 wt% of a solvent; and 0-1 wt% of an additive. The clearcoat composition provides a high-gloss topcoat that contrasts sharply with the first paint layer and exhibits a good appearance.

[0013] The present application also provides a method for preparing the electronic device housing assembly, comprising the following steps:

[0014] Providing a substrate, wherein the substrate surface comprises a first region and a second region connected to each other;

[0015] applying an excimer lacquer composition to a first region of the substrate and applying a clearcoat composition to a second region of the substrate;

[0016] After the excimer paint composition and the varnish composition are leveled, the energy is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and a mercury lamp with a wavelength of 320nm to 420nm is used for the third curing to form the first paint layer and the second paint layer respectively.

[0017] The present application utilizes the characteristics of the excimer resin paint composition that only the surface is cured under the excimer lamp, which can form multiple micron-level wrinkles and then be completely cured into a film, and the characteristic of the varnish composition that it does not cure under the excimer lamp and the two do not diffuse with each other. The excimer paint composition and the varnish composition are respectively coated on the first area and the second area of ​​the substrate to form paint films of different glossiness under the same curing conditions, thereby obtaining electronic equipment housing components with different surface effects, such as matte or matte finishes. Not only is the process simple and time-saving, but it can also make the step difference at the joint of paint films of different glossiness small or no step difference. At the same time, the excimer paint composition and the varnish composition do not diffuse, which can avoid the splicing seam from being tortuous or blurred, thereby ensuring that the electronic equipment housing component has a good appearance.

[0018] This application also provides an electronic device, including the electronic device housing assembly described in the above technical solution. The electronic device housing assembly described in the above technical solution has a surface paint film with little or no step difference and varying gloss levels, and has clear seams, resulting in a good appearance. Furthermore, the first paint layer, having a loop-like texture structure formed by multiple micron-scale folds, provides a skin-friendly feel, enhancing the user experience of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart showing the process of achieving a matte surface by combining spraying with laser engraving.

[0020] Figure 2 This is a schematic diagram of the process of achieving a smooth and matte surface by using a batch spraying method;

[0021] Figure 3 This is a schematic diagram of the process of achieving a matte surface by using masking spraying combined with simultaneous curing;

[0022] Figure 4 This is a schematic structural diagram of an electronic device in an embodiment of the present application;

[0023] Figure 5 A schematic structural diagram of the electronic device housing assembly provided in this application;

[0024] Figure 6 Photographs of electronic device housing assemblies provided for this application;

[0025] Figure 7 A low-magnification electron microscope photograph of the electronic device housing assembly provided in this application;

[0026] Figure 8 A high-magnification electron microscope photograph of the electronic device housing assembly provided for this application;

[0027] Figure 9 This is an electron microscope photograph of the first paint layer;

[0028] Figure 10 This is an electron microscope photograph of the second paint layer;

[0029] Figure 11 A schematic diagram of the surface structure of the first paint layer provided in an embodiment of the present application;

[0030] Figure 12 A schematic diagram of a stacked structure of an electronic device housing assembly provided in yet another embodiment of the present application;

[0031] Figure 13 This is a flow chart of the preparation process of the electronic device housing assembly provided in this application. DETAILED DESCRIPTION

[0032] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0033] Unless otherwise defined, the technical or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] For 3C products, spraying combined with laser engraving is generally used to achieve a matte surface effect. Figure 1 , Figure 1 This is a schematic diagram of the process of achieving a matte-glossy surface by combining spraying with laser engraving. The main process is to first spray the entire surface of the substrate 11 with a high-gloss topcoat 12, and then use laser engraving to prepare a matte surface 14 in a local area 13, thereby forming a matte-glossy surface. However, for products with large surface areas, this solution requires too long a laser engraving time and is expensive. Batch spraying is another method to obtain a matte-glossy surface. Figure 2 , Figure 2 A flow chart of achieving a glossy and matte surface by batch spraying is provided, wherein the first area 21 on the substrate surface is masked, the first topcoat 23 is sprayed and cured on the second area 22 on the substrate surface, the first topcoat 23 is masked, and the second topcoat 24 is sprayed and cured on the first area 21 on the substrate surface. The first topcoat 23 and the second topcoat 24 are opposite to each other, being a glossy topcoat and a matte topcoat. However, this solution easily leads to a step difference at the joint between the first topcoat 23 and the second topcoat 24, which may cause problems such as scratching hands.

[0035] The applicant found in the research that the light-matt homogeneous surface can be prepared by using the scheme of masking spraying combined with simultaneous curing, see Figure 3 , Figure 3 The present invention is a flow chart showing a method of achieving a glossy and matte surface by masking spraying combined with simultaneous curing. First, the first area 31 on the surface of the substrate is masked, and the first topcoat 33 is sprayed on the second area 32 on the surface of the substrate. Then, the first topcoat 33 is masked, and the second topcoat 34 is sprayed on the first area 31 on the surface of the substrate. The first topcoat 33 and the second topcoat 34 are cured at the same time. The first topcoat 33 and the second topcoat 34 are glossy and matte paints respectively, but in this scheme, the matte powder in the matte paint will diffuse toward the glossy paint side, thereby causing appearance defects such as blurred and uneven splicing boundaries.

[0036] Based on this, one embodiment of the present application provides an electronic device housing assembly, comprising:

[0037] A substrate, wherein a surface of the substrate includes a first region and a second region connected to each other;

[0038] The first area is provided with a first paint layer, and the surface of the first paint layer has a loop-shaped texture structure formed by a plurality of micron-scale wrinkles;

[0039] The second region is provided with a second paint layer, and the glossiness of the surface of the second paint layer is higher than the glossiness of the surface of the first paint layer.

[0040] The electronic device described in this application can be any device with communication and storage functions, such as a smartphone, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a tablet computer, a personal digital assistant (PAD), a laptop computer, a digital camera, an e-book reader, a portable multimedia player, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a 5G terminal device, etc. The embodiments of this application are not limited to this.

[0041] This application is explained using a smartphone as an example. Figure 4 , Figure 4 Schematic diagram of the structure of an electronic device in one embodiment of the present application. In one embodiment, the electronic device 10 includes a middle frame 100, a display screen 200 and a battery cover 300. The middle frame 100 connects the display screen 200 and the battery cover 300 respectively to form a receiving space. The motherboard, memory, power supply and other devices of the electronic device 10 are arranged in the receiving space. Among them, the middle frame 100 and the battery cover 300 constitute the appearance of the smart phone, which is the shell assembly described in the following embodiments. It can be understood by those skilled in the art that the shell assembly mentioned in the following embodiments can be the middle frame or the battery cover, or when the middle frame and the battery cover are integrated, the shell assembly is the middle frame and the battery cover.

[0042] See also Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 , Figure 5 This is a schematic diagram of the structure of the electronic device housing assembly provided in this application. Figure 6 Photos of electronic device housing components provided for this application, Figure 7 A low-magnification electron microscope photograph of the electronic device housing assembly provided in this application, Figure 8 The high-magnification electron microscope photo of the electronic device housing component provided in this application is Figure 9 This is an electron microscope photo of the first paint layer. Figure 10 This is an electron microscope photograph of the second paint layer, where 101 is the substrate, 1021 is the first paint layer, and 1022 is the second paint layer.

[0043] The electronic device housing assembly includes a substrate 101, which is the main structure of the electronic device housing assembly. Its material includes but is not limited to metal, resin or resin composite material, etc. This application does not have any special significance for it, and it can be used to prepare electronic device housings.

[0044] The surface of substrate 101 includes a first region and a second region that are interconnected. The first region is provided with a first paint layer, and the second region is provided with a second paint layer. This application does not specifically limit the shape, size, etc. of the first and second regions, and they can be designed according to the requirements of the electronic device housing assembly. The first and second regions are interconnected and together constitute the surface of the electronic housing. The first region is provided with a first paint layer 1021, and the second region is provided with a second paint layer 1022. Those skilled in the art will understand that the first and second paint layers 1021 and 1022 are interconnected.

[0045] In the present application, the first paint layer 1021 and the second paint layer 1022 have different glossiness, so that the surface of the electronic device housing assembly presents different appearance effects, achieving appearance diversity. Those skilled in the art will understand that the glossiness of a paint film is correlated with its appearance. For example, when the glossiness is >85, the paint film can be called a high-gloss paint film, and its surface is as smooth as a mirror and can reflect light. The paint film looks bright and dazzling, and has good decorative and aesthetic properties. When the glossiness is 61-85, the paint film can be called a glossy paint film, and its surface has a certain glossiness, but is slightly softer than high-gloss, giving the paint film a fresh and bright effect, and has certain decorative and aesthetic properties. When the glossiness is 31-60, the paint film can be called a semi-gloss paint film, and its glossiness is between glossy and flat, and the paint film gives a soft and elegant feeling. When the glossiness is 16-30, the paint film can be called flat, and the surface has a slight gloss, but is not dazzling, and presents a soft and warm luster. When the glossiness is 0-15, the paint film is called matte, and the surface is almost matte, appears foggy, and does not reflect light.

[0046] In the present application, the glossiness of the first paint layer 1021 and the second paint layer 1022 is different, and specifically, the glossiness can be different to the degree described above, so that the surface of the electronic device housing component presents an appearance with different effects, for example, it can be a splicing of high gloss and matte, or a splicing of gloss and matte, or a splicing of matte and matte of different degrees, presenting two different appearance effects.

[0047] In some specific implementations, the surface of the first paint layer 1021 has a loop-shaped texture structure formed by a plurality of micron-scale wrinkles, see Figure 11 , Figure 11 This is a schematic diagram of the surface structure of a first paint layer provided in an embodiment of the present application. The first paint layer has multiple micron-sized wrinkles, each forming a loop-like texture. In some specific implementations, the height of each wrinkle is determined by the thickness of the first paint layer, typically ranging from 10 μm to 30 μm, and the center-to-center distance between adjacent wrinkles is preferably 5 μm to 15 μm. The first paint layer 1021, having a loop-like texture formed by multiple micron-sized wrinkles, exhibits a low gloss, resulting in a matte finish.

[0048] In some specific implementations, the glossiness of the surface of the second paint layer 1022 is different from the glossiness of the surface of the first paint layer. As mentioned above, the glossiness of the surface of the second paint layer 1022 can be much higher than the glossiness of the surface of the first paint layer 1021, forming a splicing of high gloss, glossy, semi-gloss or flat gloss and matte; the glossiness of the surface of the second paint layer 1022 can be slightly higher than the glossiness of the surface of the first paint layer 1021, forming a splicing of different matte and matte, and the present application has no special restrictions on this.

[0049] In some specific implementations, the first paint layer 1021 and the second paint layer 1022 have the same thickness, that is, there is no step difference between the first paint layer 1021 and the second paint layer 1022, and there will be no scratching problems. This application selects a first paint layer with a loop-shaped texture structure formed by multiple micron-level wrinkles on the surface as the matte layer. Its specific formation method enables the second paint layer to be cured simultaneously with it, so that there is no step difference between the two, and there will be no mutual diffusion resulting in unclear boundaries and affecting the appearance of the product. In some specific implementations, the thickness of the first paint layer and the second paint layer is 15μm to 50μm, preferably 20μm to 45μm, and more preferably 25μm to 40μm.

[0050] In some specific implementations, the first paint layer 1021 is formed by curing an excimer paint composition. The excimer paint composition is a composition that can be surface-cured under the irradiation of an excimer lamp to form multiple micron-sized wrinkles and a loop-shaped texture structure, and then cured again to fully cure the composition. The present application does not specifically limit the excimer paint composition. In order to achieve better bonding performance with the substrate used in the electronic device housing assembly, the excimer paint composition preferably includes:

[0051] 30 wt% to 40 wt% of an excimer resin;

[0052] 15wt% to 25wt% of UV high-functional resin;

[0053] 5wt% to 10wt% of yellowing-resistant resin;

[0054] 4 wt% to 8 wt% of UV monomer;

[0055] 1 wt% to 3 wt% of a photoinitiator;

[0056] 10 wt% to 20 wt% of a solvent;

[0057] 1 wt% to 3 wt% of an auxiliary agent;

[0058] 3wt% to 6wt% of matting powder.

[0059] The excimer paint composition includes 30wt% to 40wt% of an excimer resin, which is a resin that can be cured under the irradiation of an excimer lamp to form wrinkles. This application has no special restrictions on the excimer resin, including but not limited to aliphatic polyesters.

[0060] The excimer paint composition includes 15 wt% to 25 wt% of a UV-high-functionality resin. This UV-high-functionality resin can be cured under ultraviolet light to provide the desired properties of the paint layer, such as hardness and abrasion resistance. Those skilled in the art will appreciate that the UV-high-functionality resin described herein is a resin with a functionality of 6 or higher. This application does not specifically limit the UV-high-functionality resin; any commercially available resin with the aforementioned properties can be used.

[0061] The excimer paint composition includes 5 to 10 wt% of a yellowing-resistant resin, which is used to improve the yellowing resistance of the paint film. In some specific implementations, the yellowing-resistant resin is a resin with a functionality of 2 to 3. This application does not specifically limit the yellowing-resistant resin; any commercially available resin with the aforementioned functionality can be used.

[0062] The excimer paint composition includes 4 wt% to 8 wt% of UV monomer, which can improve the leveling performance and toughness of the composition and increase the crosslinking density of the paint film. This application has no special restrictions on the UV monomer, and any commercially available polymerizable monomer with the above functions can be used.

[0063] The excimer paint composition includes 1 wt% to 3 wt% of a photoinitiator, which is used to initiate polymerization and crosslinking of the resin, thereby curing the resin to form a paint film. The present application has no particular restrictions on the photoinitiator, and the photoinitiator can be selected based on the photopolymerization groups in each resin.

[0064] The excimer paint composition includes 10 wt% to 20 wt% of a solvent for dissolving the resin to form a solution. The present application has no particular limitation on the solvent, as long as it can dissolve the corresponding raw materials.

[0065] The excimer paint composition includes 1 wt% to 3 wt% of additives, which are used to improve the performance of the paint film, including but not limited to additives for improving the feel, leveling agents, ultraviolet light absorbers, etc. This application has no special restrictions on the types and specific components of the additives, and those skilled in the art can choose according to their needs.

[0066] The excimer paint composition includes 3wt% to 6wt% of matting powder, which has the functions of facilitating film curing, facilitating construction, improving the thixotropic effect of the paint film, preventing sagging, and preventing bright edge phenomenon. The present application has no special restrictions on the type of matting powder, and those skilled in the art can choose according to their needs.

[0067] The excimer paint composition provided in the present application can form multiple micron-level wrinkles under the conditions of excimer curing, thereby forming a loop-like texture structure, has low gloss, presents a matte state, and has a good touch, which can improve the user experience of the electronic device housing assembly.

[0068] Specifically, the excimer paint composition can be cured according to the following conditions:

[0069] The energy used is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and perform the third curing using a mercury lamp with a wavelength of 320nm to 420nm.

[0070] In some specific implementations, the second paint layer 1022 is formed by curing a varnish composition, which may be a high-gloss topcoat, and the present application has no particular limitation thereto. In some specific implementations, the varnish composition includes:

[0071] 20wt% to 35wt% of UV high-functional resin;

[0072] 10wt% to 25wt% of UV low-functionality resin;

[0073] 1 wt% to 5 wt% of UV monomer;

[0074] 2 wt% to 4 wt% of a photoinitiator;

[0075] 1wt% to 3wt% of a leveling agent;

[0076] 20 wt% to 30 wt% of a solvent;

[0077] 0-1wt% of auxiliary agent.

[0078] The varnish composition is a high-gloss topcoat that contrasts sharply with the first paint layer, resulting in a superior appearance. The varnish composition includes 20 to 35 wt% of a UV-curable high-functionality resin, which cures under ultraviolet light to provide the desired properties of the paint layer, such as hardness and abrasion resistance. Those skilled in the art will appreciate that the UV-curable high-functionality resin described herein is a resin with a functionality of 6 or greater. This application does not impose any particular restrictions on the UV-curable high-functionality resin; any commercially available resin with the aforementioned properties may be used.

[0079] The varnish composition includes 10% to 25% by weight of a UV low-functionality resin, which is used to adjust the toughness, hardness, and other properties of the paint film. In some specific implementations, the UV low-functionality resin has a functionality of 2 to 3. This application does not specifically limit the UV low-functionality resin; any commercially available resin with the aforementioned functionality can be used.

[0080] The varnish composition includes 1 wt% to 5 wt% of UV monomer, which can improve the leveling performance, toughness, adhesion and other properties of the composition. This application has no special restrictions on the UV monomer, and any commercially available polymerizable monomer with the above functions can be used.

[0081] The varnish composition includes 2 wt% to 4 wt% of a photoinitiator, which is used to initiate polymerization and crosslinking of the resin, thereby curing the resin to form a paint film. The present application has no particular restrictions on the photoinitiator, and the photoinitiator can be selected based on the photopolymerization groups in each resin.

[0082] The varnish composition includes 20 wt% to 30 wt% of a solvent for dissolving the resin to form a solution. The present application has no particular limitation on the solvent, as long as it can dissolve the corresponding raw materials.

[0083] The varnish composition includes 1 wt% to 3 wt% of a leveling agent for adjusting the wettability and leveling properties of the solution. The present application has no particular restrictions on the leveling agent, and it can be one or more commonly used leveling agents. When multiple leveling agents are used, the present application has no particular restrictions on the selection and relative amounts of the leveling agents.

[0084] The varnish composition includes 0wt% to 1wt% of an auxiliary agent, which is used to improve the performance of the paint film, including but not limited to auxiliary agents for improving the feel, ultraviolet light absorbers, etc. This application has no special restrictions on the type and specific composition of the auxiliary agent, and those skilled in the art can choose according to their needs.

[0085] The varnish composition provided in the present application does not cure under the conditions of excimer curing, but cures to form a film in the subsequent curing process, forming a high-gloss paint film that presents a high-gloss state, thereby forming a matte-glossy appearance structure.

[0086] In order to simplify the preparation process, the varnish composition and the excimer resin composition are cured simultaneously, that is, the varnish composition can also be cured according to the following method:

[0087] The energy used is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and perform the third curing using a mercury lamp with a wavelength of 320nm to 420nm.

[0088] This application uses a first paint layer with a loop-shaped texture structure formed by multiple micron-level wrinkles on the surface as a matte layer. Its specific formation method can enable the second paint layer to solidify simultaneously with it, so that the step difference between the two is small or non-existent, and they will not diffuse with each other to cause unclear boundaries, affecting the appearance of the product.

[0089] In some specific implementations, the electronic device housing assembly further includes a primer layer 103 disposed on the surface of the substrate 101, and the primer layer 103 is used to improve the bonding strength between the substrate 101 and the first paint layer 1021 and the second paint layer 1022. Figure 12 , Figure 12 This is a schematic diagram of the laminated structure of an electronic device housing assembly provided in another embodiment of the present application, wherein 101 is a substrate, 1021 is a first paint layer, 1022 is a second paint layer, 103 is a primer layer, and 104 is a color paint layer.

[0090] The present application has no special limitation on the primer layer 103 , which may be a bonding resin, such as acrylic resin, polyurethane or epoxy resin.

[0091] To further enhance the appearance of the electronic device housing assembly, it may further include a color paint layer 104 disposed on the surface of the primer layer 103. The color paint layer 104 may improve the color of the electronic device housing assembly. In some specific implementations, the color paint layer 104 may include a resin and a pigment. This application does not specifically limit this. The color paint layer may be formed using a color paint composition commonly used for housing assemblies.

[0092] The present application also provides a method for preparing the electronic device housing assembly, comprising the following steps:

[0093] Providing a substrate, wherein the substrate surface comprises a first region and a second region connected to each other;

[0094] applying an excimer lacquer composition to a first region of the substrate and applying a clearcoat composition to a second region of the substrate;

[0095] After the excimer paint composition and the varnish composition are leveled, the energy is 1000mj / cm 2 ~2000mj / cm 2, the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and a mercury lamp with a wavelength of 320nm to 420nm is used for the third curing to form the first paint layer and the second paint layer respectively.

[0096] See also Figure 13 , Figure 13 This is a flow chart of the manufacturing process for the electronic device housing assembly provided in this application. First, a first paint layer composition is sprayed onto a first area 301 on the surface of a substrate 30. Then, a second paint layer composition is sprayed onto a second area 302. After the first and second paint layer compositions are leveled, pre-curing, excimer curing, and a third curing step are sequentially performed to form a first paint layer 303 and a second paint layer 304 on the substrate.

[0097] Specifically, the present application first provides a substrate 30. The surface of the substrate 30 is divided into a first region 301 and a second region 302 connected to each other according to a predetermined appearance structure. A first paint layer composition is then applied to the first region 301 and a second paint layer composition is applied to the second region 302 using a masking method. Those skilled in the art will appreciate that the first paint layer composition can be applied to the first region 301 after masking the second region 302, and then the second paint layer composition can be applied to the second region 302. Alternatively, the first region 301 can be masked before the second region 302 and the second paint layer composition can be applied, and then the second paint layer composition can be applied to the first region 301 after masking the second paint layer composition. This application does not specifically limit this. As mentioned above, the first paint layer composition can be an excimer paint composition, and the second paint layer composition can be a varnish composition. This application does not specifically limit this. The application also does not specifically limit the coating method, and can use methods commonly used by those skilled in the art, such as screen printing, roller coating, and spraying.

[0098] After the excimer paint composition and the varnish composition are applied, they are leveled so that the excimer paint composition and the varnish composition have substantially the same thickness. At this point, the excimer paint composition and the varnish composition are both in liquid form, and the same thickness can be achieved through leveling. At the same time, the excimer paint composition and the varnish composition belong to different systems, and they will not diffuse with each other, and will not affect the clear boundary between the two. This application has no special restrictions on the leveling method, and leveling can be performed by gravity or surface tension. In some specific implementations, the leveling temperature is 40°C to 60°C, and the time is 5min to 10min.

[0099] After leveling, the excimer paint composition and the varnish composition are cured simultaneously, and the curing parameters are as follows:

[0100] The energy used is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and perform the third curing using a mercury lamp with a wavelength of 320nm to 420nm.

[0101] This application first uses an energy of 1000mj / cm 2 ~2000mj / cm 2 , the first curing is carried out by using an LED lamp with a wavelength of 395nm to 445nm (UVV). At this time, the bottom layer of the excimer resin paint composition undergoes deep curing to reach a microgel state, while the varnish composition does not undergo any change; then the energy of 400mj / cm 2 ~500mj / cm 2 , the second curing is carried out with an excimer lamp with a wavelength of 200nm to 275nm (UVC). The penetrating power of this excimer lamp is relatively weak and cannot reach the deep layer of the excimer resin composition. It can only make the surface react quickly to form a loop-like micro texture, while the varnish composition does not change. Finally, the energy of 800mj / cm 2 ~1200mj / cm 2 , a third curing is performed using a mercury lamp with a wavelength of 320nm to 420nm (UVA), so that the excimer resin paint composition is completely cured into a film. At the same time, the varnish composition is completely cured into a film, thereby forming a first paint layer 303 and a second paint layer 304.

[0102] The present application utilizes the characteristics of the excimer resin paint composition that only the surface is cured under the excimer lamp, which can form multiple micron-level wrinkles and then be completely cured into a film, and the characteristic of the varnish composition that it does not cure under the excimer lamp and the two do not diffuse with each other. The excimer paint composition and the varnish composition are respectively coated on the first area and the second area of ​​the substrate to form paint films of different glossiness under the same curing conditions, thereby obtaining electronic equipment housing components with different surface effects, such as matte or matte finishes. Not only is the process simple and time-saving, but it can also make the step difference at the joint of paint films of different glossiness small or no step difference. At the same time, the excimer paint composition and the varnish composition do not diffuse, which can avoid the splicing seam from being tortuous or blurred, thereby ensuring that the electronic equipment housing component has a good appearance.

[0103] The present application provides an electronic device including the electronic device housing assembly described in the above technical solution. The electronic device housing assembly described in the above technical solution has a surface paint film with little or no step difference and varying gloss levels, and features clear seams, resulting in a good appearance. Furthermore, the first paint layer, having a loop-like texture structure formed by multiple micron-scale folds, provides a skin-friendly feel, enhancing the user experience of the electronic device.

[0104] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An electronic device housing assembly, comprising: A substrate, wherein a surface of the substrate includes a first region and a second region connected to each other; The first area is provided with a first paint layer, and the surface of the first paint layer has a loop-shaped texture structure formed by a plurality of micron-scale wrinkles; The second region is provided with a second paint layer, and the glossiness of the surface of the second paint layer is different from the glossiness of the surface of the first paint layer. 2 . The electronic device housing assembly according to claim 1 , wherein the glossiness of the surface of the second paint layer is higher than the glossiness of the surface of the first paint layer.

3. The electronic device housing assembly according to claim 2, wherein: The first paint layer and the second paint layer have the same thickness.

4. The electronic device housing assembly according to claim 3, wherein: The thickness of the first paint layer and the second paint layer is 15 μm to 50 μm.

5. The electronic device housing assembly according to claim 4, wherein: The first paint layer is formed by curing an excimer paint composition.

6. The electronic device housing assembly according to claim 5, wherein: The excimer paint composition comprises: 30 wt% to 40 wt% of an excimer resin; 15wt% to 25wt% of UV high-functional resin; 5wt% to 10wt% of yellowing-resistant resin; 4 wt% to 8 wt% of UV monomer; 1 wt% to 3 wt% of a photoinitiator; 10 wt% to 20 wt% of a solvent; 1 wt% to 3 wt% of an auxiliary agent; 3wt% to 6wt% of matting powder.

7. The electronic device housing assembly according to claim 6, wherein: The curing is specifically: The energy used is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and perform the third curing using a mercury lamp with a wavelength of 320nm to 420nm.

8. The electronic device housing assembly according to claim 4, wherein: The second paint layer is formed by curing the clearcoat composition.

9. The electronic device housing assembly according to claim 8, wherein: The varnish composition comprises: 20wt% to 35wt% of UV high-functional resin; 10wt% to 25wt% of UV low-functionality resin; 1 wt% to 5 wt% of UV monomer; 2 wt% to 4 wt% of a photoinitiator; 1wt% to 3wt% of a leveling agent; 20 wt% to 30 wt% of a solvent; 0-1wt% of auxiliary agent.

10. The electronic device housing assembly according to claim 9, wherein: The curing is specifically: The energy used is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and perform the third curing using a mercury lamp with a wavelength of 320nm to 420nm.

11. The electronic device housing assembly according to any one of claims 1 to 10, characterized in that: The substrate includes any one of metal, resin or resin composite material.

12. The method for preparing the electronic device housing assembly according to claims 1 to 11, comprising the following steps: Providing a substrate, wherein the substrate surface comprises a first region and a second region connected to each other; applying an excimer lacquer composition to a first region of the substrate and applying a clearcoat composition to a second region of the substrate; After the excimer paint composition and the varnish composition are leveled, the energy is 1000mj / cm 2 ~2000mj / cm 2 , the first curing is performed with an LED lamp with a wavelength of 395nm to 445nm, and then the energy is 400mj / cm 2 ~500mj / cm 2 , the second curing was performed with an excimer lamp with a wavelength of 200nm to 275nm, and finally the energy was 800mj / cm 2 ~1200mj / cm 2 , and a mercury lamp with a wavelength of 320nm to 420nm is used for the third curing to form the first paint layer and the second paint layer respectively.

13. The preparation method according to claim 12, characterized in that The leveling temperature is 40° C. to 60° C., and the leveling time is 5 min to 10 min.

14. An electronic device comprising the electronic device housing assembly according to any one of claims 1 to 11.

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