Metal housing assembly, manufacturing method thereof and electronic device

Abstract

The present application provides a metal shell assembly, a manufacturing method thereof, and an electronic device. The metal shell assembly includes: a metal shell body, the metal shell body having at least one fracture, the fracture extending from the inner surface of the metal shell body to the outer surface of the metal shell body; a plastic layer, the plastic layer is arranged in the fracture, the inner surface of the plastic layer is flush with the inner surface of the metal shell body, and the thickness of the plastic layer is less than the thickness of the metal shell body; an imitation metal layer, the imitation metal layer is arranged in the fracture, and is located on the outer surface of the plastic layer, wherein the color difference value ΔE≤1 between the appearance color of the imitation metal layer and the appearance color of the metal shell body. Thus, the setting of the imitation metal layer can make up for the difference in the appearance visual effect of the metal shell body at the fracture, so that the overall appearance visual effect of the metal shell assembly is uniform and consistent, without the appearance visual difference, and the all-metal appearance effect of the metal shell assembly is achieved, thereby enhancing the appearance expression of the metal shell assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a metal housing component and a manufacturing method thereof and electronic equipment. Background Art

[0002] Due to the antenna signal shielding, the metal shell of the mobile phone needs to be cut open to form a fracture to prevent the antenna signal from being shielded. Then, injection molded plastic is usually used as the connecting material at the fracture, which is simple to process and low in cost. However, the metal surface treatment is usually anodized, while the plastic is not treated to maintain its original color, which will form a color difference between the metal and the plastic. If the plastic width is small (currently usually 0.8-1.2mm), the visual impact is not significant, but if the antenna requirements are higher, such as 5G mobile phones, the plastic width will be much larger, and the difference between plastic and metal will be very obvious, which will seriously affect the integrated visual effect of the appearance of the mobile phone and form a visual gap in appearance.

[0003] Therefore, research on metal shell components needs to be deepened. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a metal shell assembly, the visual appearance of the metal shell assembly is consistent and there is no visual difference in appearance.

[0005] In one aspect of the present application, the present application provides a metal shell assembly. According to an embodiment of the present application, the metal shell assembly includes: a metal shell body, the metal shell body having at least one fracture, the fracture extending from the inner surface of the metal shell body to the outer surface of the metal shell body; a plastic layer, the plastic layer is arranged in the fracture, the inner surface of the plastic layer is flush with the inner surface of the metal shell body, and the thickness of the plastic layer is less than the thickness of the metal shell body; an imitation metal layer, the imitation metal layer is arranged in the fracture and located on the outer surface of the plastic layer, wherein the color difference value ΔE≤2 between the appearance color of the imitation metal layer and the appearance color of the metal shell body. Thus, the setting of the imitation metal layer can make up for the difference in the appearance visual effect of the metal shell body at the fracture, so that the overall appearance visual effect of the metal shell assembly is uniform and consistent, without the appearance visual difference, and the full metal appearance effect of the metal shell assembly is achieved, thereby improving the appearance expression of the metal shell assembly; and the setting of the above-mentioned imitation metal layer will not shield the antenna signal.

[0006] In another aspect of the present application, the present application provides a method for making a metal shell assembly. According to an embodiment of the present application, the method for making a metal shell assembly includes: providing a metal shell body, the metal shell body having at least one fracture, the fracture extending from the inner surface of the metal shell body to the outer surface of the metal shell body; forming a plastic layer in the fracture, the inner surface of the plastic layer is flush with the inner surface of the metal shell body, and the thickness of the plastic layer is less than the thickness of the metal shell body; forming an imitation metal layer in the fracture, and the imitation metal layer is located on the outer surface of the plastic layer, wherein the color difference value ΔE between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ≤2. Therefore, in the above-mentioned production method, the setting of the imitation metal layer can make up for the difference in the appearance visual effect of the metal shell body at the fracture, so that the overall appearance visual effect of the metal shell assembly is uniform and consistent, without any visual difference in appearance, thereby achieving the full metal appearance effect of the metal shell assembly, and thereby improving the appearance expressiveness of the metal shell assembly; moreover, the setting of the above-mentioned imitation metal layer will not shield the antenna signal; furthermore, the above-mentioned production method is simple, accurate, easy to implement, and has a mature process, which is convenient for industrial production.

[0007] In another aspect of the present application, the present application provides an electronic device. According to an embodiment of the present application, the electronic device includes: the metal shell assembly described above; a display screen assembly, the display screen assembly is connected to the metal shell assembly, and an installation space is defined between the display screen assembly and the metal shell assembly; and a mainboard, the mainboard is arranged in the installation space and is electrically connected to the display screen assembly; an antenna assembly, the antenna assembly is arranged on the surface of the metal shell close to the display screen assembly, and is electrically connected to the mainboard. As a result, the electronic device has an all-metal appearance, has no visual difference in appearance, and has better appearance expression. Those skilled in the art can understand that the electronic device has all the features and advantages of the metal shell assembly described above, and will not be elaborated on here. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic structural diagram of a metal shell assembly in one embodiment of the present application.

[0009] Figure 2 yes Figure 1 Cross-sectional view along AA'.

[0010] Figure 3 FIG. 1 is another structural diagram of a metal shell assembly in an embodiment of the present application.

[0011] Figure 4 This is a flow chart of a method for manufacturing a metal shell assembly in yet another embodiment of the present application.

[0012] Figure 5 It is a structural schematic diagram of the metal shell body in another embodiment of the present application.

[0013] Figure 6 yes Figure 5 Cross-sectional view along AA'.

[0014] Figure 7 It is a schematic diagram of the structure of manufacturing a metal shell assembly in another embodiment of the present application.

[0015] Figure 8 It is a schematic diagram of the structure of manufacturing a metal shell assembly in another embodiment of the present application.

[0016] Fig. 9 It is a schematic diagram of the structure of a metal shell assembly made by using a hot stamping device in one embodiment of the present application.

[0017] Fig.10 It is a schematic diagram of the structure of a metal shell assembly made by using a hot stamping device in one embodiment of the present application.

[0018] Fig.11 It is a structural diagram of an electronic device in another embodiment of the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used that do not specify the manufacturer are all conventional products that can be obtained commercially.

[0020] In one aspect of the present application, the present application provides a metal housing assembly. According to an embodiment of the present application, referring to Figure 1 ( Figure 1 is a top view of the metal housing component from the exterior surface of the metal housing component) and Figure 2 ( Figure 2 for Figure 1The metal shell assembly 100 comprises: a metal shell body 10, the metal shell body 10 having at least one break 11 (for preventing the antenna signal of the electronic device from being shielded by the metal shell body), the break 11 extending from the inner surface 12 of the metal shell body 10 to the outer surface 13 of the metal shell body; a plastic layer 20, the plastic layer 20 is arranged in the break 11, and the inner surface 21 of the plastic layer 20 is flush with the inner surface 12 of the metal shell body 10. The imitation metal layer 30 is arranged in the fracture 11 and is located on the outer surface 22 of the plastic layer 20, wherein the color difference between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ΔE≤2 (for example, ΔE is 2, 1.8, 1.6, 1.4, 1.2, 1, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4, 0.3, 0.2, 0.1, etc.). Thus, the setting of the imitation metal layer can make up for the difference in the visual effect of the appearance color of the metal shell body at the fracture, so that the visual effect of the overall appearance color of the metal shell assembly is uniform and consistent, without the visual difference in the appearance color, and the full metal appearance effect of the metal shell assembly is achieved, thereby improving the appearance expression of the metal shell assembly; moreover, the setting of the above-mentioned imitation metal layer will not shield the antenna signal.

[0021] It should be noted that the above-mentioned "external surface" refers to the surface of a certain structure close to the appearance of the metal shell component, and the "inner surface" refers to the surface of a certain structure away from the appearance of the metal shell component. For example: the outer surface 13 of the metal shell body 10 refers to the surface of the metal shell body close to the appearance of the metal shell component, and the inner surface 12 of the metal shell body 10 refers to the surface of the metal shell body away from the appearance of the metal shell component; the outer surface 22 of the plastic layer 20 refers to the surface of the plastic layer 20 close to the appearance of the metal shell component, and the inner surface 21 of the plastic layer 20 refers to the surface of the plastic layer 20 away from the appearance of the metal shell component; the outer surface 31 of the imitation metal layer 30 is the surface of the imitation metal layer 30 close to the appearance of the metal shell component.

[0022] Furthermore, the color difference between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ΔE≤0.4. Therefore, in appearance, the appearance color of the imitation metal layer is closer to the appearance color of the metal shell body, further improving the consistency of the appearance colors of the two, thereby better achieving the all-metal appearance effect of the metal shell assembly.

[0023] The color difference value is obtained by testing with a colorimeter. Specifically, the L, A, and B values ​​of the appearance color of the imitation metal layer are tested by color difference, which are recorded as L1, A1, and B1 respectively. The L, A, and B values ​​of the appearance color of the metal shell body are tested by color difference, which are recorded as L2, A2, and B2 respectively. Then, the formula ΔE=[(L1-L2) 2 +(A1-A2) 2 +(B1-B2) 2 ] 1 / 2 .

[0024] There are no special requirements for the specific material of the metal shell body, and those skilled in the art can flexibly select it according to the actual situation. For example, iron, aluminum, aluminum alloy, magnesium alloy or stainless steel can be selected. Furthermore, the metal shell body is a metal shell body that has been pre-anodized, thereby improving the metallic luster of the metal shell assembly.

[0025] The break 11 in the metal shell assembly is provided to prevent the antenna signal of the electronic device from being shielded. Those skilled in the art may select the specific position of the break 11 according to the specific position of the antenna in the electronic device (the break needs to expose at least a portion of the antenna). Figure 1 The fracture can be set in the middle frame 15 part of the metal shell component body 10; in other embodiments, the fracture can also be set in the back cover 14 part of the technical shell body 10 (not shown in the figure).

[0026] Further, see Figure 1 and Figure 2 The width D of the fracture is 0.8 to 20 mm (for example, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 4 mm, 5 mm, 8 mm, 10 mm, 13 mm, 15 mm, 17 mm or 20 mm). Therefore, the fracture of the above width can meet the needs of various electronic devices such as 4G or 5G to prevent antenna signals from being shielded; and the fracture of the above width is relatively simple to manufacture and easy to implement; if the width D of the fracture is less than 0.8 mm, it is not convenient to operate in terms of the manufacturing process.

[0027] Further, there is no special requirement for the specific material of the plastic layer, and those skilled in the art can flexibly select it according to the actual situation. In some embodiments, the specific material of the plastic layer includes but is not limited to PET (polyethylene terephthalate), PC (polycarbonate), PMMA (polymethyl methacrylate) or ABS.

[0028] Further, see Figure 2, the outer surface 31 of the imitation metal layer 30 is flush with the outer surface 13 of the metal shell body 10. Therefore, the imitation metal layer is flush with the surface of the metal shell body, which can effectively ensure the flatness of the overall outer surface of the metal shell assembly to improve the overall appearance of the metal shell assembly. It should be noted that due to process reasons, it may be difficult to achieve a completely flush state between the outer surface 31 of the imitation metal layer 30 and the outer surface 13 of the metal shell body 10. Therefore, the "flush" here means "basically flush", and the user can visually and tactilely feel that the outer surface 31 of the imitation metal layer 30 is flush with the outer surface 13 of the metal shell body 10.

[0029] Furthermore, the imitation metal layer is prepared by transferring part of the structure of the electrochemical aluminum foil onto the surface of the plastic layer through an electrochemical aluminum hot stamping process, wherein, with reference to Figure 3 The imitation metal layer 30 includes: a bonding layer 32, which is disposed on the outer surface 22 of the plastic layer 20; an aluminum-plated layer 33, which is disposed on the surface of the bonding layer 32 away from the plastic layer 20; and a coloring layer 34, which is disposed on the surface of the aluminum-plated layer 33 away from the plastic layer 20. The color of the coloring layer can be adjusted according to the metal color of the metal shell body, and combined with the aluminum-plated layer, so that the imitation metal layer shows a metallic color consistent with the metal shell body and has a better metallic luster. When the outer surface 31 of the imitation metal layer 30 is required to be flush with the outer surface 13 of the metal shell body 10, it is required that the surface of the coloring layer 34 away from the plastic layer 20 is flush with the outer surface 13 of the metal shell body 10.

[0030] Furthermore, the coloring layer includes a resin and a dye (the dye determines the color of the coloring layer). In some embodiments, the coloring layer is a single-layer structure, that is, the dye is directly added to the resin and mixed evenly, wherein the mass percentage of the dye in the coloring layer is less than or equal to 10%, so that the performance of the resin can be ensured not to be affected; in other embodiments, the coloring layer is a multi-layer stacked structure, that is, including a resin layer (such as polyurethane), a dye layer and a protective layer (such as a UV protective layer) stacked in sequence.

[0031] Among them, the next color is a hot melt adhesive layer, which mainly has a bonding effect, bonding the electrochemical aluminum foil to the surface of the plastic layer to improve the bonding force between the plastic layer and the imitation metal layer, thereby improving the structural stability of the metal shell assembly.

[0032] Further, the thickness of the imitation metal layer is 8.5 to 56 microns, such as 8.51 microns, 10.52 microns, 15.52 microns, 20.01 microns, 25.02 microns, 26.01 microns, 31.01 microns, 36.01 microns, 41.02 microns, 45.02 microns, 46.01 microns, 50.01 microns, 55.01 microns. Wherein, when the imitation metal layer is formed by electrochemical aluminum foil, the thickness of the coloring layer is 8 to 50 microns (such as 8 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns or 50 microns); the thickness of the aluminum plating layer is 0.01 to 0.02 microns; the thickness of the adhesive layer is 0.5 to 5 microns (such as 0.5 microns, 1 micron, 2 microns, 3 microns, 4 microns or 5 microns). Therefore, the imitation metal layer of the above thickness has better performance.

[0033] Furthermore, there is a gap between the imitation metal layer and the metal shell body, that is, there is no contact connection between the imitation metal layer and the metal shell body, and there is a gap between the two. Thus, the antenna signal is further prevented from being shielded. Among them, the spacing of the gap is greater than 0 and less than or equal to 0.03 microns (for example, the spacing of the gap is 0.01 microns, 0.02 microns or 0.03 microns). Thus, it can be better ensured that the antenna signal will not be shielded, and the gap of the above spacing is not easily perceived visually, so as not to cause adverse effects on the appearance of the metal shell assembly.

[0034] In another aspect of the present application, the present application provides a method for manufacturing a metal housing assembly. According to an embodiment of the present application, referring to Figure 4 , a method for making a metal housing assembly includes:

[0035] S100: Provide a metal shell body 10, the metal shell body 10 has at least one fracture 11, the structural schematic diagram is shown in FIG. Figure 5 and Figure 6 ( Figure 6 for Figure 5 The fracture 11 extends from the inner surface 12 of the metal shell body 10 to the outer surface 13 of the metal shell body. Figure 5 The metal shell body in the embodiment includes a rear cover 14 and a middle frame 15 , and the break 11 is arranged on the middle frame 15 .

[0036] There are no special requirements for the method of forming the fracture 11, and those skilled in the art can flexibly select it according to the actual situation. For example, laser cutting can be used to obtain the fracture.

[0037] The metal shell body is pre-treated by grinding, polishing, sandblasting and anodizing, which can greatly improve the metallic luster of the metal shell assembly.

[0038] S200: forming a plastic layer 20 in the fracture 11, wherein the inner surface 21 of the plastic layer 20 is flush with the inner surface 12 of the metal shell body 10, and the thickness of the plastic layer 20 is less than the thickness of the metal shell body 10. Figure 7 .

[0039] Among them, refer to Figure 7 The width D of the fracture is 0.8 to 20 mm (for example, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 4 mm, 5 mm, 8 mm, 10 mm, 13 mm, 15 mm, 17 mm or 20 mm). Therefore, the fracture of the above width can meet the needs of various electronic devices such as 4G or 5G to prevent antenna signals from being shielded; and the fracture of the above width is relatively simple to manufacture and easy to implement; if the width D of the fracture is less than 0.8 mm, it is not convenient to operate in terms of the manufacturing process.

[0040] Further, see Figure 8 The steps of forming the plastic layer 20 include:

[0041] Step 1: Fill the fracture 11 with a plastic filler 25, wherein the inner surface 251 of the plastic filler 25 is flush with the inner surface 12 of the metal shell body 10, and the thickness of the plastic filler 25 is equal to the thickness of the metal shell body 10. The plastic filler 25 may be filled in the fracture by plastic injection molding.

[0042] Step 2: Thin the plastic filler 25 to obtain the plastic layer 20. Laser engraving, such as carbon dioxide laser, can be used to thin the plastic filler without processing the metal shell body, wherein the thickness of the plastic filler to be thinned (i.e., the thickness of the subsequent metal-like layer to be formed) is 8.5 to 56 microns.

[0043] S300: forming an imitation metal layer 30 in the fracture 11, and the imitation metal layer 30 is located on the outer surface 22 of the plastic layer 20, wherein the color difference between the appearance color of the imitation metal layer 30 and the appearance color of the metal shell body 10 is ΔE≤2, and the structural schematic diagram is shown in FIG. Figure 1 and 2 .

[0044] Further, see Figure 2 The outer surface 31 of the imitation metal layer 30 is flush with the outer surface 13 of the metal shell body 10. Thus, the imitation metal layer is flush with the surface of the metal shell body, which can effectively ensure the flatness of the overall outer surface of the metal shell assembly, thereby improving the overall appearance of the metal shell assembly.

[0045] In this step, the step of forming the pseudo-metal layer includes:

[0046] Step 1: Provide anodized aluminum foil.

[0047] The electrochemical aluminum foil includes a substrate (polyester film), a release layer, a coloring layer, an aluminum-plated layer and an adhesive layer which are stacked in sequence, wherein the substrate plays a supporting role, and the release layer allows the coloring layer, the aluminum-plated layer and the adhesive layer to quickly separate from the substrate and transfer to the surface of the plastic layer. The thickness of the substrate is 8 to 25 microns, the thickness of the release layer is 0.01 to 0.05 microns, the thickness of the coloring layer is 8 to 50 microns, the thickness of the aluminum-plated layer is 0.01 to 0.02 microns, and the thickness of the adhesive layer is 0.5 to 5 microns.

[0048] Step 2: Use the electrochemical aluminum hot stamping process to transfer the adhesive layer 32, the aluminum-plated layer 33 and the coloring layer 34 in the electrochemical aluminum foil to the outer surface of the plastic layer, wherein the adhesive layer 32 is located on the outer surface 22 of the plastic layer 20; the aluminum-plated layer 33 is arranged on the surface of the adhesive layer 32 away from the plastic layer 20; the coloring layer 34 is arranged on the surface of the aluminum-plated layer 33 away from the plastic layer 20, and the structural diagram is shown in FIG. Figure 3 .

[0049] In the step of forming the pseudo-metal layer, refer to Fig. 9 and Fig.10 , the electrochemical aluminum foil 2 (taking reel transmission as an example) is placed in the foil placing device 1 of the hot stamping equipment, and the heater 3 of the hot stamping equipment heats the hot stamping head 4, and then the hot stamping head 4 heats the adhesive layer 32 in the electrochemical aluminum foil 2, and the hot stamping equipment transfers the adhesive layer, aluminum plating layer and coloring layer in the electrochemical aluminum foil 2 to the surface of the plastic layer 20, and obtains the workpiece 5 (or the metal shell component 100), wherein the adhesive layer is hot melt adhesive, which can be well bonded with the plastic layer after being heated, greatly improving the bonding force between the two. The hot stamping equipment also includes a foil collecting device 6 for collecting the electrochemical aluminum foil after transfer.

[0050] According to the embodiments of the present application, in the above-mentioned manufacturing method, the setting of the imitation metal layer can make up for the difference in the appearance visual effect of the metal shell body at the fracture, so that the overall appearance visual effect of the metal shell assembly is uniform and consistent, without any visual difference in appearance, thereby achieving the full metal appearance effect of the metal shell assembly, and thereby improving the appearance expressiveness of the metal shell assembly; moreover, the setting of the above-mentioned imitation metal layer will not shield the antenna signal; furthermore, the above-mentioned manufacturing method is simple, accurate, easy to implement, and has a mature process, which is convenient for industrial production.

[0051] In another aspect of the present application, the present application provides an electronic device. According to an embodiment of the present application, referring to Fig.11The electronic device 100 comprises: the metal housing assembly 100 described above; a display assembly 200, the display assembly 200 is connected to the metal housing assembly 100, and an installation space is defined between the display assembly 200 and the metal housing assembly 100; and a mainboard ( Fig.11 The mainboard is arranged in the installation space and is electrically connected to the display screen assembly; the antenna assembly ( Fig.11 (not shown), the antenna assembly is arranged on the surface of the metal shell near the display assembly and is electrically connected to the mainboard, wherein at least a portion of the antenna assembly corresponds to the fracture of the metal shell body. As a result, the electronic device has an all-metal appearance, has no visual difference in appearance, and has better appearance expression. Those skilled in the art can understand that the electronic device has all the features and advantages of the metal shell assembly described above, and will not be described in detail here.

[0052] Those skilled in the art can understand that the above “at least a portion of the antenna assembly corresponds to the fracture of the metal shell body” means that the fracture of the metal shell body can expose at least a portion of the antenna assembly.

[0053] There is no special requirement for the specific type of electronic device, and those skilled in the art can flexibly select it according to the actual situation. In some embodiments, the specific type of electronic device includes but is not limited to mobile phones (such as Fig.11 As shown), laptops, iPads, kindles, game consoles and other electronic devices.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A metal housing assembly, characterized in that: include: A metal shell body, wherein the metal shell body has at least one fracture, and the fracture extends from the inner surface of the metal shell body to the outer surface of the metal shell body; A plastic layer, wherein the plastic layer is disposed in the fracture, an inner surface of the plastic layer is flush with an inner surface of the metal shell body, and a thickness of the plastic layer is less than a thickness of the metal shell body; An imitation metal layer, wherein the imitation metal layer is arranged in the fracture and is located on the outer surface of the plastic layer, wherein the color difference between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ΔE≤2; there is a gap between the imitation metal layer and the metal shell body, and the spacing of the gap is greater than 0 microns and less than or equal to 0.03 microns; the imitation metal layer is prepared by transferring part of the structure of the electrochemical aluminum foil to the surface of the plastic layer through an electrochemical aluminum hot stamping process.

2. The metal housing assembly according to claim 1, characterized in that: The color difference between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ΔE≤0.

4.

3. The metal housing assembly according to claim 1, characterized in that: The outer surface of the imitation metal layer is flush with the outer surface of the metal shell body.

4. The metal housing assembly according to claim 1, characterized in that: The simulated metal layer comprises: An adhesive layer, the adhesive layer being disposed on the outer surface of the plastic layer; An aluminum-plated layer, the aluminum-plated layer being disposed on a surface of the adhesive layer away from the plastic layer; A coloring layer is arranged on a surface of the aluminum-plated layer away from the plastic layer.

5. The metal housing assembly according to claim 1 or 2, characterized in that: The width of the fracture is 0.8 to 20 mm.

6. The metal housing assembly according to claim 3, characterized in that: The thickness of the imitation metal layer is 8.5 to 56 microns.

7. A method for manufacturing a metal housing assembly, characterized in that: include: Providing a metal shell body, wherein the metal shell body has at least one fracture, and the fracture extends from the inner surface of the metal shell body to the outer surface of the metal shell body; A plastic layer is formed in the fracture, wherein the inner surface of the plastic layer is flush with the inner surface of the metal shell body, and the thickness of the plastic layer is less than the thickness of the metal shell body; An imitation metal layer is formed in the fracture, and the imitation metal layer is located on the outer surface of the plastic layer, wherein the color difference between the appearance color of the imitation metal layer and the appearance color of the metal shell body is ΔE≤2; there is a gap between the imitation metal layer and the metal shell body, and the spacing of the gap is greater than 0 microns and less than or equal to 0.03 microns; the imitation metal layer is prepared by transferring part of the structure of the electrochemical aluminum foil to the surface of the plastic layer through an electrochemical aluminum hot stamping process.

8. The method according to claim 7, characterized in that The outer surface of the imitation metal layer is flush with the outer surface of the metal shell body.

9. The method according to claim 7 or 8, characterized in that: The steps of forming the plastic layer include: Filling the fracture with a plastic filler, wherein the inner surface of the plastic filler is flush with the inner surface of the metal shell body, and the thickness of the plastic filler is equal to the thickness of the metal shell body; The thickness of the plastic filler is reduced to obtain the plastic layer.

10. The method according to claim 7 or 8, characterized in that: The steps of forming the pseudo-metal layer include: Provide anodized aluminum foil; The adhesive layer, the aluminum plating layer and the coloring layer in the anodized aluminum foil are transferred to the outer surface of the plastic layer by using an anodized aluminum hot stamping process. The bonding layer is located on the outer surface of the plastic layer; the aluminum-plated layer is arranged on the surface of the bonding layer away from the plastic layer; and the coloring layer is arranged on the surface of the aluminum-plated layer away from the plastic layer.

11. An electronic device, characterized in that: include: The metal shell assembly according to any one of claims 1 to 6; A display screen assembly, wherein the display screen assembly is connected to the metal shell assembly, and an installation space is defined between the display screen assembly and the metal shell assembly; as well as A mainboard, which is disposed in the installation space and is electrically connected to the display screen assembly; The antenna assembly is arranged on the surface of the metal shell close to the display screen assembly and is electrically connected to the main board, wherein at least a portion of the antenna assembly corresponds to the fracture of the metal shell body.

Images