Shell, preparation method thereof and electronic equipment

Abstract

The invention relates to the technical field of electronic equipment, in particular to a shell, a preparation method thereof and electronic equipment. The shell comprises a shell base body, a covering layer, a first decorative film and a second decorative film; the shell base body comprises a shell main body, a first connecting part and a functional module decoration part, and the functional module decoration part is located on the shell main body and connected with the shell main body through the first connecting part; the inner surface of the first connecting part comprises a first cambered surface; the covering layer is located on the first cambered surface; the first decorative film covers at least part of the inner surface of the shell main body and extends to cover the covering layer; and the second decorative film covers at least part of the inner surface of the decorative part of the functional module and extends to cover the covering layer. The problem that bubbles are likely to be generated during attachment of the decorative film due to evolution of shell modeling can be solved.

Description

Technical Field

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

[0002] With the development of mankind and the progress of science and technology, people's pursuit of the beauty of scientific and technological products has been continuously improved, and the demand for the colorful CMF (Color-Material-Finishing, color, material and surface treatment) effects of electronic products has been continuously strong, which has promoted the progress of the materials industry and the development of the process field. Combined with advanced production technology, a variety of decorative films with matching colors and textures are matched on the shell, which can make the shell present a colorful appearance effect, and electronic equipment with colorful CMF effects can be manufactured. At the same time, the development of industrial design has promoted the evolution of shell shape, and the functional module decoration part on the shell has gradually evolved from a plane to a boss, enriching the CMF effect. However, the evolution of the shell shape brings inconvenience to the bonding of the decorative film, and bubbles are prone to appear after the decorative film is bonded. Summary of the invention

[0003] Based on this, the present application provides a shell and a preparation method thereof and an electronic device to solve the problem of bubbles easily generated during the lamination of the decorative film caused by the gradual evolution of the functional module decorative part on the shell from a plane to a boss.

[0004] The first aspect of the present application provides a housing, and the technical solution thereof is as follows:

[0005] A shell body comprises a shell base, a covering layer, a first decorative film and a second decorative film; the shell base comprises a shell body, a first connecting portion and a functional module decorative portion, the functional module decorative portion is located on the shell body and connected to the shell body through the first connecting portion; the inner surface of the first connecting portion comprises a first curved surface; the covering layer is located on the first curved surface; the first decorative film covers at least part of the inner surface of the shell body and extends to cover the covering layer; the second decorative film covers at least part of the inner surface of the functional module decorative portion and extends to cover the covering layer.

[0006] The second aspect of the present application provides a method for preparing a shell, and the technical solution thereof is as follows:

[0007] A method for preparing a shell comprises the following steps:

[0008] Obtain a shell base, the shell base comprising a shell body, a first connecting portion and a functional module decoration portion, the functional module decoration portion is located on the shell body and connected to the shell body through the first connecting portion; the inner surface of the first connecting portion comprises a first curved surface;

[0009] forming a covering layer on the first curved surface;

[0010] A first decorative film and a second decorative film are attached to the shell base, so that the first decorative film adheres to at least part of the inner surface of the shell body and extends to adhere to the covering layer, and the second decorative film adheres to at least part of the inner surface of the functional module decoration part and extends to adhere to the covering layer.

[0011] The third aspect of the present application provides an electronic device, and its technical solution is as follows:

[0012] An electronic device comprises a display module, the above-mentioned housing or the housing prepared by the above-mentioned preparation method, and a circuit board;

[0013] The housing and the display module enclose a containing space;

[0014] The circuit board is arranged in the accommodating space.

[0015] This application has the following beneficial effects:

[0016] The inventor of the present application found that the bubbles generated by the laminating decorative film are concentrated on the first curved surface of the first connecting part. In the present application, a covering layer is formed on the first curved surface, and a first decorative film and a second decorative film are provided, and both the first decorative film and the second decorative film are covered on the covering layer. The above arrangement has the following advantages: First, the decorative film is divided into the first decorative film and the second decorative film, and the edge of the decorative film is increased, and the increased edge is located on the first curved surface, which is conducive to eliminating the bubbles generated on the first curved surface; second, when observed from the outer surface of the shell, the covering layer can cover the increased edge, so the appearance effect observed from the outer surface of the shell is less affected; third, the first decorative film and the second decorative film can bring a richer CMF effect. Fourth, during the laminating process of the decorative film, in order to make the decorative film unfold and fit along the product to be laminated, a tensile force is usually applied to the decorative film, and a small amount of tensile deformation can be generated by stretching, and the generated tensile deformation is used to match the shape of the position to be laminated. Compared with laminating the decorative film on the shell body and the functional module decorative part, the amount of stretching deformation required for laminating the decorative film on the first curved surface is larger, which may easily cause the edges of the first decorative film and the second decorative film on the first curved surface to be irregular after laminating. If the covering layer is not set, there will be gaps between the irregular edges of the first decorative film and the second decorative film, which will cause blank space and thus cause poor appearance. The covering layer set in the present application can avoid such poor appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application and to more completely understand the present application and its beneficial effects, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0018] Figure 1 is a schematic structural diagram of a housing according to an embodiment;

[0019] Figure 2 for Figure 1 A cross-sectional view of the A-A' section;

[0020] Figure 3 is a cross-sectional view of a housing according to another embodiment;

[0021] Figure 4 is a flow chart of a method for preparing a shell according to one embodiment;

[0022] Figure 5 A schematic diagram of the structural changes of a shell during the preparation process of an embodiment;

[0023] Figure 6 is a flow chart of laminating a first decorative film and a second decorative film on a shell substrate in one embodiment;

[0024] Figure 7 The figure is a schematic diagram of a process of laminating a first decorative film and a second decorative film on a carrier film according to an embodiment. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in conjunction with specific embodiments. The present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] the term

[0028] Unless otherwise specified or there is a contradiction, the terms and phrases used in this application have the following meanings:

[0029] In the present application, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the present application, "several" means at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0030] In this application, "optionally", "optional" and "optional" refer to optional, that is, to any one of the two parallel schemes of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0031] In this application, in the "first aspect", "second aspect", "third aspect", "fourth aspect", etc., the terms "first", "second", "third", "fourth", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0032] In the present application, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the present application, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by a person skilled in the art.

[0034] In this application, electronic devices may be, but are not limited to, various personal computers, laptops, smart phones, tablet computers, IoT devices, and portable wearable devices. IoT devices may be smart speakers, smart TVs, smart air conditioners, smart car devices, etc. Portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc.

[0035] The evolution of the current shell shape brings inconvenience to the lamination of the decorative film, and bubbles are prone to appear after the decorative film is lamination. In view of the above problems, the first aspect of the present application provides a shell. In one embodiment, see Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of the shell observed from one side of the outer surface of the shell. Figure 2 for Figure 1 The sectional view of the AA′ section shows that the housing 1 includes a housing base 10 , a covering layer 11 , a first decorative film 12 and a second decorative film 13 .

[0036] The shell base 10 includes a shell body 101, a functional module decoration part 102 and a first connection part 103. The functional module decoration part 102 is located on the shell body 101. The functional module decoration part 102 is connected to the shell body 101 through the first connection part 103. At this time, the inner surface of the first connection part 103 connects the inner surface of the shell body 101 and the inner surface of the functional module decoration film 102. The inner surface of the first connection part 103 includes a first curved surface 1031.

[0037] The covering layer 11 is located on the first curved surface 1031 .

[0038] The first decorative film 12 covers at least a portion of the inner surface of the shell body 101 and extends to cover the covering layer 11 . At this time, the edge of the first decorative film 12 located on the first curved surface covers the covering layer 11 .

[0039] The second decoration film 13 covers at least a portion of the inner surface of the functional module decoration portion 102 and extends to cover the cover layer 11 . At this time, the edge of the second decoration film 13 located on the first arc surface covers the cover layer 11 .

[0040] The inventor of the present application found that the bubbles generated by the laminating decorative film are concentrated on the first curved surface of the first connecting part. In this embodiment, a covering layer 11 is formed on the first curved surface 1031, and a first decorative film 12 and a second decorative film 13 are provided, and the first decorative film 12 and the second decorative film 13 cover the covering layer 11. The above arrangement has the following advantages: first, the decorative film is divided into the first decorative film 12 and the second decorative film 13, and the edge of the decorative film is increased, and the increased edge is located on the first curved surface 1031, which is conducive to eliminating the bubbles generated on the first curved surface 1031; second, when observed from the outer surface side of the shell, the covering layer 11 can cover the increased edge, so the appearance effect observed from the outer surface side of the shell is less affected; third, the first decorative film 12 and the second decorative film 13 can bring a richer CMF effect. Fourth, during the laminating process of the decorative film, in order to make the decorative film unfold and laminar along the product to be laminar, a tensile force is usually applied to the decorative film, and a small amount of tensile deformation can be generated by stretching, and the generated tensile deformation is used to match the shape of the position to be laminar. Compared with laminating the decorative film on the shell body 101 and the decorative part of the functional module, the amount of stretching deformation required for laminating the decorative film on the first arc surface 1031 is larger, which may easily cause the edges of the first decorative film 12 and the second decorative film 13 on the first arc surface 1031 to be irregular after laminating. If the covering layer is not provided, there will be gaps between the irregular edges of the first decorative film 12 and the second decorative film 13, which will cause blank space and thus cause poor appearance. The covering layer 11 provided in this embodiment can avoid such poor appearance.

[0041] It can be understood that in order to reflect the decorative effects of the first decorative film and the second decorative film, the shell substrate is translucent. Optionally, the material of the shell substrate is selected from one or more of translucent glass, translucent plastic and translucent ceramic. Considering that glass has a good feel, good gloss and high transparency, the shell substrate 10 of this embodiment is made of translucent glass.

[0042] In this embodiment, the first decorative film 12 completely covers the inner surface of the shell body 101, and the second decorative film 13 completely covers the inner surface of the functional module decorative part 102. From the outer surface of the shell, it can be observed that the shell body and the functional module decorative part of the shell are completely decorated by the first decorative film 12 and the second decorative film 13. In other embodiments, the first decorative film can also cover part of the inner surface of the shell body, and the second decorative film can also cover part of the inner surface of the functional module decorative part to meet other decorative requirements.

[0043] The first decorative film and the second decorative film can be a film with texture after the film is exposed and developed. Compared with spraying ink on the inner surface of the shell substrate to form a decorative layer, the above-mentioned film is more shiny and has a better texture, and is more compatible with the combination of light-transmitting glass.

[0044] The textures of the first decorative film and the second decorative film may be different. The colors of the first decorative film and the second decorative film may be different. Compared with using one decorative film to create one appearance effect, combining decorative films with different textures and colors can achieve a richer CMF effect.

[0045] In this embodiment, the texture of the first decorative film 12 is glossy and the color is green, and the texture of the second decorative film 13 is matte and the color is black. In other embodiments, the texture and color of the first decorative film and the second decorative film can be selected as needed.

[0046] Optionally, the first decorative film and the second decorative film may be spaced apart or partially overlapped. The relative position of the first decorative film and the second decorative film is related to the relative position of the first decorative film and the second decorative film before lamination and the tensile deformation generated during the lamination process. The tensile deformation generated during the lamination process is related to the curvature radius of the first curved surface.

[0047] Optionally, the gap between the first decorative film and the second decorative film is 0.2 mm to 0.5 mm, for example, the gap may be 0.2 mm to 0.3 mm, 0.2 mm to 0.4 mm, 0.2 mm to 0.5 mm, 0.3 mm to 0.4 mm, 0.3 mm to 0.5 mm, or 0.4 mm to 0.5 mm.

[0048] In the present application, the width W of the covering layer is greater than the gap between the first decorative film and the second decorative film. Figure 1 The width W of the covering layer 11 refers to the dimension of the covering layer 11 on the first arc surface in the direction from the inner surface side of the shell body connected to the inner surface side of the functional module decorative part connected to the first connecting part.

[0049] Optionally, the width W of the covering layer satisfies: 0.6 mm ≤ W ≤ 1 mm. For example, W may be 0.6 mm, 0.8 mm, or 1 mm.

[0050] Optionally, the cover layer is a photoresist layer or an ink layer. It can be understood that the photoresist layer is obtained by patterning the photoresist, and the ink layer is obtained by curing the ink.

[0051] Please continue to see Figure 2 The housing 1 of this embodiment further includes a side wall portion 104 and a second connection portion 105, the side wall portion 104 is connected to the housing body 101 through the second connection portion 105, and the first decorative film 12 covers the inner surface of the side wall portion 104 and the inner surface of the second connection portion. The inner surface of the second connection portion 105 covered by the first decorative film 12 includes a second curved surface 1051.

[0052] In this embodiment, the first decorative film 12 completely covers the inner surface of the side wall portion 104 and the inner surface of the second connecting portion 105, and the bubbles generated on the second curved surface 1051 can be discharged through the edge located on the side wall portion. From the outer surface side of the housing 1, it can be observed that the side wall portion 104 and the second connecting portion 105 of the housing 1 are completely decorated by the first decorative film 12. In other embodiments, the first decorative film may also cover part of the inner surface of the side wall portion and part of the inner surface of the second connecting portion to meet other decorative requirements.

[0053] In another embodiment, see Figure 3 The shell 2 includes a shell base 20, a cover layer 21, a first decorative film 22 and a second decorative film 23. The shell base 20 includes a shell body 201, a functional module decorative part 202 and a first connecting part 203. The functional module decorative part 202 is located on the shell body 201. The functional module decorative part 202 is connected to the shell body 201 through the first connecting part 203. At this time, the inner surface of the first connecting part 203 connects the inner surface of the shell body 201 and the inner surface of the functional module decorative film 202. The inner surface of the first connecting part 203 includes a first curved surface 2031.

[0054] The covering layer 21 is located on the first curved surface 2031 .

[0055] The first decorative film 22 covers the inner surface of the shell body 201 and extends to cover the covering layer 21 . At this time, the edge of the first decorative film 22 located on the first arc surface covers the covering layer 21 .

[0056] The second decorative film 23 covers the inner surface of the functional module decorative portion 202 and extends to cover the cover layer 21 . At this time, the edge of the second decorative film 23 located on the first arc surface covers the cover layer 21 .

[0057] Compared to Figure 3 The housing 2 shown, Figure 2 When the shell 1 shown is attached with a decorative film, it is easier to generate bubbles on the first curved surface 1031 due to the existence of the second curved surface 1051. By setting a covering layer, a first decorative film and a second decorative film in the present application, the bubbles generated on the first curved surface 1031 can be discharged from the edge of the decorative film on the covering layer 11, thereby solving the bubble problem.

[0058] In this embodiment, the functional module decoration part 102 can accommodate a functional module, such as a camera module. Figure 1 The functional module decoration part 102 of this embodiment is provided with a through hole 1021 penetrating its inner surface and outer surface. The through hole 1021 is used to transmit light and can be used with a camera. It can be understood that in this embodiment, the inner surface of the functional module decoration part 102 other than the through hole 1021 is covered with the second decorative film 13.

[0059] In this embodiment, the outer surface of the shell substrate further includes a logo graphic layer.

[0060] How to avoid the appearance of bubbles is one of the difficulties in the decorative film lamination process. In view of the above difficulties, the second aspect of the present application provides a method for preparing a shell. In one embodiment, see Figure 4 and Figure 5 , the method for preparing the shell comprises the following steps:

[0061] S100 , obtaining a shell substrate 10 .

[0062] Figure 5 In the embodiment, the shell substrate 10 includes a shell body 101, a functional module decoration part 102 and a first connection part 103. The functional module decoration part 102 is located on the shell body 101. The functional module decoration part 102 is connected to the shell body 101 through the first connection part 103. At this time, the inner surface of the first connection part 103 connects the inner surface of the shell body 101 and the inner surface of the functional module decoration film 102. The inner surface of the first connection part 103 includes a first curved surface 1031.

[0063] The shell body, the first connecting part and the functional module decoration part are as described above and will not be repeated here.

[0064] Figure 5 In the embodiment, the shell base 10 further comprises a side wall portion 104 and a second connecting portion 105, and the side wall portion 104 is connected to the shell body 101 via the second connecting portion 105. The inner surface of the second connecting portion 105 comprises a second curved surface 1051.

[0065] The side wall portion 104 and the second connection portion 105 are as described above and will not be described in detail herein.

[0066] Optionally, the material of the shell substrate is selected from one or more of light-transmitting glass, light-transmitting plastic and light-transmitting ceramic. In this embodiment, the shell substrate 10 is light-transmitting glass, and the light-transmitting glass is heat-bent to form the shell body 101, the first connecting portion 103, the functional module decorative portion 102, the side wall portion 104 and the second connecting portion 105 in one piece. Through heat-bent one-piece forming, an integrated visual effect is achieved.

[0067] In other embodiments, if the shell base does not include the side wall portion and the second connecting portion, the shell body, the functional module decoration portion and the side wall portion are integrally formed to obtain the shell base.

[0068] Optionally, the curvature radius R1 of the first curved surface satisfies: R1 ≥ 1 mm. For example, R1 may be 1 mm, 5 mm, 10 mm, or 50 mm.

[0069] The curvature radius R1 of the first curved surface is related to the tensile deformation during the bonding process of the first decorative film and the second decorative film, and further to the relative position of the first decorative film and the second decorative film after bonding. In this embodiment, the curvature radius R1 of the first curved surface can be controlled by hot bending of the light-transmitting glass.

[0070] In this embodiment, obtaining the shell base also includes the following steps: forming a through hole penetrating the inner surface and the outer surface of the functional module decoration part.

[0071] S200 , forming a cover layer 11 on the first curved surface 1031 .

[0072] The covering layer has been described above and will not be described in detail here.

[0073] In this embodiment, the width W of the covering layer 11 needs to be larger than the gap between the first decorative film and the second decorative film after subsequent lamination. The width W of the covering layer satisfies: 0.6 mm ≤ W ≤ 1 mm. For example, W can be 0.6 mm, 0.8 mm, or 1 mm.

[0074] The covering layer 11 may be formed on the first curved surface 1031 by method 1 or method 2 described below.

[0075] Method 1: forming a cover layer 11 on the first curved surface 1031, comprising the following steps:

[0076] A photoresist is coated on the shell substrate, and a cover layer 11 is formed on the first arc surface 1031 through a patterning process.

[0077] Optionally, the patterning process includes a drying process, an exposure process and a development process, and in this case the covering layer is a photoresist layer.

[0078] Method 2, forming a cover layer 11 on the first curved surface 1031, includes the following steps:

[0079] Ink is printed on the first curved surface 131 to form a covering layer 11 .

[0080] Optionally, the method of printing the ink may be screen printing, pad printing, offset printing or embossing, and the ink is cured to form a covering layer.

[0081] Compared with method 2, method 1 is more suitable for forming a covering layer on the first curved surface with R1 ≥ 1 mm.

[0082] S300, laminating the first decorative film 12 and the second decorative film 13 on the shell substrate, making the first decorative film 12 laminating to the inner surface of the shell body 101 and extending to laminating on the cover layer 11, and making the second decorative film 13 laminating to the inner surface of the functional module decoration part 102 and extending to laminating on the cover layer 11.

[0083] The first decorative film and the second decorative film are as described above and will not be described in detail herein.

[0084] In this embodiment, the first decorative film 12 is completely attached to the inner surface of the shell body 101, the inner surface of the second connecting portion 105, and the inner surface of the side wall portion 104, and the second decorative film 13 is completely attached to the inner surface of the functional module decorative portion 102. In other embodiments, the first decorative film may be attached to part of the inner surface of the shell body, the inner surface of the second connecting portion 105, and the inner surface of the side wall portion 104, and the second decorative film may be attached to part of the inner surface of the functional module decorative portion to meet other decorative requirements.

[0085] In this embodiment, the inner surface of the second connecting portion 105 includes a second curved surface 1051, so that the first decorative film 12 is completely attached to the second curved surface 1051. In other embodiments, the first decorative film 12 can also be attached to a portion of the second curved surface. Since it is necessary to attach to the second curved surface 1051, it is easier to generate bubbles on the first curved surface 1031. By providing the cover layer, the first decorative film and the second decorative film in this application, the bubbles generated on the first curved surface 1031 can be discharged from the edge of the decorative film on the cover layer 11, thereby solving the bubble problem.

[0086] In this embodiment, the first decorative film and the second decorative film are simultaneously bonded to the shell substrate in one bonding process. Figure 6 The method of laminating the first decorative film and the second decorative film on the shell substrate comprises the following steps:

[0087] S310, see Figure 7 A carrier film 3 is provided, and the carrier film 3 includes a first carrier area 32 and a second carrier area 33. The gap between the first carrier area 32 and the second carrier area 33 is H1, which can be formed by laser engraving. Optionally, H1 is 0.1 mm to 0.2 mm. For example, H1 can be 0.1 mm, 0.15 mm, or 0.2 mm.

[0088] S320, attaching the first decorative film 12 to the first carrying area 32. It is understandable that, in order to protect the first decorative film, a release film is usually attached to the first decorative film, and before attaching the first decorative film 12 to the first carrying area 32, the step of tearing off the release film on the first decorative film 12 is also included.

[0089] S330, attaching the second decorative film 13 to the second carrying area 33. Similarly, to protect the second decorative film, a release film is usually attached to the second decorative film. Before attaching the second decorative film 13 to the second carrying area 33, the step of tearing off the release film on the second decorative film 13 is also included.

[0090] Since there is a gap between the first carrying area 32 and the second carrying area 33 on the carrying film, the gap is H1, when the first decorative film 12 is attached to the first carrying area 32 and the second decorative film 13 is attached to the second carrying area 33, there is a gap between the first decorative film 12 and the second decorative film 13 on the carrying film, and the gap is also H1.

[0091] S340, attaching the first decorative film 12 and the second decorative film 13 on the carrier film 3 to the shell substrate 10. Figure 5 , make the first decorative film 12 on the carrier film fit the inner surface of the shell body 101 and extend to fit on the cover layer 11, make the second decorative film 13 on the carrier film fit the inner surface of the functional module decoration part 102 and extend to fit on the cover layer 11, and remove the carrier film.

[0092] The first decorative film 12 and the second decorative film 13 on the carrier film 3 are spaced apart, and the gap is H1. During the process of transferring and laminating the first decorative film 12 and the second decorative film 13 on the carrier film 3 to the shell substrate 10, the gap between the first decorative film 12 and the second decorative film 13 will change. Optionally, after the first decorative film and the second decorative film are laminarized, the first decorative film and the second decorative film on the shell substrate are spaced apart or partially overlapped.

[0093] In this embodiment, the gap H1 between the first decorative film 12 and the second decorative film 13 on the carrier film 3 is 0.1mm to 0.2mm. For example, H1 can be 0.1mm, 0.15mm, or 0.2mm. In the process of transferring and bonding the first decorative film 12 and the second decorative film 13 on the carrier film 3 to the shell substrate 10, due to a small offset and a small amount of tensile deformation, the gap between the first decorative film 12 and the second decorative film 13 will change. After bonding, the edges of the first decorative film and the second decorative film on the covering layer are irregular, and the gap H2 between the first decorative film and the second decorative film is 0.2mm to 0.5mm. For example, the gap can be 0.2mm to 0.3mm, 0.2mm to 0.4mm, 0.2mm to 0.5mm, 0.3mm to 0.4mm, 0.3mm to 0.5mm, or 0.4mm to 0.5mm.

[0094] The textures of the first decorative film and the second decorative film may be different. The colors of the first decorative film and the second decorative film may be different. Compared with using one decorative film to create one appearance effect, combining decorative films with different textures and colors can achieve a richer CMF effect. At the same time, the setting of the covering layer can prevent the irregular edges caused by the stretching deformation of the first decorative film from not matching the irregular edges caused by the stretching deformation of the second decorative film, resulting in gaps being observed on the outer surface of the shell.

[0095] It can be understood that laminating the first decorative film and the second decorative film on the carrier film and laminating the first decorative film and the second decorative film on the carrier film on the shell substrate can be completed by a 3D laminating machine. After laminating, the carrier film is removed.

[0096] Optionally, after removing the carrier film, a degassing step is also included.

[0097] By optimizing the lamination and degassing process parameters, the defects such as bubbles, film cracks and wrinkles can be eliminated to achieve the desired appearance effect.

[0098] Optionally, when laminating the first decorative film and the second decorative film on the carrier film, the machine pressure may be 0.65±0.1MPa, and the machine pressure may be 0.3±0.1MPa. When laminating the carrier film with the first decorative film and the second decorative film to the shell substrate, the machine pressure may be 0.6±0.1MPa, the laminating time may be 5±2s, and the PAD height may be 0-18mm-22.5mm.

[0099] Optionally, the degassing parameters include: the degassing pressure may be 14±2KGF, the degassing temperature may be 50°C±10°C, and the degassing time may be 30min±3min.

[0100] The first decorative film and the second decorative film can be simultaneously bonded to the shell substrate in one bonding process, or they can be bonded to the shell substrate separately in two bonding processes. For example, the two bonding processes include: bonding the first decorative film to the first carrier film, bonding the first decorative film on the first carrier film to the shell substrate, removing the first carrier film, degassing, and cleaning; bonding the second decorative film to the second carrier film, bonding the second decorative film on the second carrier film to the shell substrate, removing the second carrier film, degassing, and cleaning. Compared with bonding the first decorative film and the second decorative film to the shell substrate separately in two bonding processes. Bonding the first decorative film and the second decorative film in one bonding process can save half of the amount of carrier film materials and save one bonding process (including one laminating process, one degassing process, and one cleaning process). In general, bonding the first decorative film and the second decorative film at the same time in one bonding process saves more time and effort, improves production efficiency, saves process costs, and has good refinement and mass production.

[0101] It can be understood that the process of preparing the shell also includes the step of printing a logo on the outer surface of the shell substrate, the step of post-processing the obtained shell product after degassing, such as spraying the edges, pasting explosion-proof film, etc., and the step of packaging and sampling the obtained shell.

[0102] The preparation method of the shell of the present embodiment breaks through the fitting limitations of the evolution of the shell shape, and can not only realize the integral fitting of matte and glossy decorative films, but also provide effective solutions for the splicing design and fitting of more decorative films of different colors and textures, avoiding the problem of bubbles generated by arc surface fitting, and solving the problem that the irregular edges of the first decorative film and the second decorative film caused by the tensile deformation in the fitting and splicing area cannot match and the gaps are observed on the outer surface of the shell. It can also enrich the CMF effect, has excellent refinement and mass producibility, enriches the ID (Industrial Design) shape of the shell, and lays a technical foundation for realizing the fitting of decorative films with more evolved shell shapes.

[0103] A third aspect of the present application provides an electronic device. In one embodiment, the electronic device includes a display module, the above-mentioned housing or the housing prepared by the above-mentioned preparation method, and a circuit board;

[0104] The housing and the display module enclose a containing space;

[0105] The circuit board is arranged in the accommodating space.

[0106] The electronic device of the present application has all the advantages of the above-mentioned housing.

[0107] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A housing, characterized in that: It includes a shell base, a covering layer, a first decorative film and a second decorative film; the shell base includes a shell body, a first connecting part and a functional module decorative part, the functional module decorative part is located on the shell body and connected to the shell body through the first connecting part; the inner surface of the first connecting part includes a first curved surface; the covering layer is located on the first curved surface; the first decorative film covers at least part of the inner surface of the shell body and extends to cover the covering layer; the second decorative film covers at least part of the inner surface of the functional module decorative part and extends to cover the covering layer.

2. The housing according to claim 1, characterized in that The first decorative film and the second decorative film are spaced apart or partially overlapped.

3. The housing according to claim 2, characterized in that: One or more of the following conditions are met: (1) The first decorative film and the second decorative film are spaced apart, and the gap between the first decorative film and the second decorative film is 0.2 mm to 0.5 mm; (2) The width W of the covering layer satisfies: 0.6 mm ≤ W ≤ 1 mm.

4. The housing according to claim 1, characterized in that One or more of the following conditions are met: (1) The material of the shell substrate is selected from one or more of light-transmitting glass, light-transmitting plastic and light-transmitting ceramic; (2) The covering layer is a photoresist layer or an ink layer; (3) The textures of the first decorative film and the second decorative film are different; (4) The first decorative film and the second decorative film have different colors.

5. The housing according to any one of claims 1 to 4, characterized in that: The shell base also includes a side wall portion and a second connecting portion, the side wall portion is connected to the shell body via the second connecting portion, and the first decorative film covers at least a portion of the inner surface of the side wall portion and at least a portion of the inner surface of the second connecting portion.

6. The housing according to claim 5, characterized in that The inner surface of the first decorative film covering the second connecting portion includes a second curved surface.

7. The housing according to any one of claims 1 to 4 and 6, characterized in that: The functional module decoration part is provided with a through hole penetrating the inner surface and the outer surface thereof.

8. A method for preparing a shell, characterized in that: The following steps are involved: Obtain a shell base, the shell base comprising a shell body, a first connecting portion and a functional module decoration portion, the functional module decoration portion is located on the shell body and connected to the shell body through the first connecting portion; the inner surface of the first connecting portion comprises a first curved surface; forming a covering layer on the first curved surface; A first decorative film and a second decorative film are attached to the shell base, so that the first decorative film adheres to at least part of the inner surface of the shell body and extends to adhere to the covering layer, and the second decorative film adheres to at least part of the inner surface of the functional module decoration part and extends to adhere to the covering layer.

9. The method for preparing a shell according to claim 8, characterized in that: The step of forming a covering layer on the first curved surface comprises the following steps: Coating photoresist on the shell substrate, and forming the covering layer on the first curved surface by patterning; or Ink is printed on the first curved surface to form the covering layer.

10. The method for preparing a housing according to claim 8, characterized in that: The method of laminating the first decorative film and the second decorative film on the shell substrate comprises the following steps: Provide a carrier film, the carrier film comprising a first carrier area and a second carrier area, the first decorative film is adhered to the first carrier area, and the second decorative film is adhered to the second carrier area; the first decorative film on the carrier film is adhered to at least part of the inner surface of the shell body and extended to the covering layer, and the second decorative film on the carrier film is adhered to at least part of the inner surface of the functional module decoration part and extended to the covering layer, and the carrier film is removed.

11. The method for preparing a housing according to claim 10, characterized in that: One or more of the following conditions are met: (1) The first decorative film and the second decorative film on the carrier film are arranged at intervals; (2) The first decorative film and the second decorative film on the shell substrate are arranged at intervals or partially overlapped; (3) The textures of the first decorative film and the second decorative film are different; (4) The colors of the first decorative film and the second decorative film are different; (5) After removing the carrier film, the method further includes a degassing step.

12. The method for preparing a housing according to claim 11, characterized in that: One or more of the following conditions are met: (1) A gap between the first decorative film and the second decorative film on the carrier film is 0.1 mm to 0.2 mm; (2) The first decorative film and the second decorative film on the shell substrate are spaced apart, and the gap between the first decorative film and the second decorative film is 0.2 mm to 0.5 mm.

13. The method for preparing a housing according to any one of claims 8 to 12, characterized in that: One or more of the following conditions are met: (1) obtaining a shell matrix, The method comprises the following steps: forming the shell body, the first connecting portion and the functional module decoration portion into one piece; (2) The shell base also includes a side wall portion and a second connecting portion, and the side wall portion is connected to the shell body through the second connecting portion. The method of obtaining the shell base includes the following steps: integrally forming the shell body, the first connecting portion, the functional module decorative portion, the second connecting portion and the side wall portion; the method of laminating the first decorative film and the second decorative film includes the following steps: laminating the first decorative film to at least a portion of the inner surface of the side wall portion and at least a portion of the inner surface of the second connecting portion; (3) The step of obtaining the shell base comprises the following steps: forming a through hole penetrating the inner surface and the outer surface of the functional module decorative part.

14. The method for preparing a housing according to claim 13, characterized in that: The inner surface of the second connecting portion includes a second curved surface. The method of laminating the first decorative film and the second decorative film includes the following steps: laminating the first decorative film to at least a portion of the second curved surface.

15. The method for preparing a housing according to any one of claims 8 to 12 and 14, characterized in that: One or more of the following conditions are met: (1) The material of the shell substrate is selected from one or more of light-transmitting glass, light-transmitting plastic and light-transmitting ceramic; (2) The curvature radius R1 of the first arc surface satisfies: R1 ≥ 1 mm; (3) The width W of the covering layer satisfies: 0.6 mm ≤ W ≤ 1 mm.

16. An electronic device, characterized in that: Comprising a display module, a housing according to any one of claims 1 to 7 or a housing prepared by the preparation method according to any one of claims 8 to 15, and a circuit board; The housing and the display module enclose a containing space; The circuit board is arranged in the accommodating space.

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