Shell and electronic equipment

Abstract

The embodiment of the invention provides a shell and electronic equipment, and belongs to the technical field of electronic equipment, a supporting layer is arranged on one side of a base shell of the shell, an optical film layer is arranged on the supporting layer, the appearance effects such as the color and glossiness of the shell can be adjusted by adjusting the forming material, thickness and the like of the optical film layer, the designability of the appearance color, glossiness and the like of the shell is achieved, and the appearance effect of the shell is improved. The designability and flexibility of the appearance effect of the shell are enhanced, for example, the shell has the effect of imitating the texture of ceramic highlight glaze. The supporting layer provides strength support for the optical film layer, thereby facilitating the molding of the optical film layer, and facilitating the improvement of the adhesive force between the optical film layer and the supporting layer and the base shell. The first treating agent layer is arranged on the surface of the side, away from the supporting layer, of the optical film layer, the protective layer is arranged on the side, away from the base shell, of the first treating agent layer and plays a role in protecting the film layers on the base shell, the first treating agent layer can improve the binding force between the optical film layer and the protective layer and other film layers, and the stability and reliability of the optical film layer are further improved. And the durability of the appearance of the shell is improved.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a housing and an electronic device. Background Technology

[0002] With the continuous advancement of science and technology, more and more electronic devices such as smartphones, tablets, and smart wearable devices are entering people's lives. Among them, the casing of electronic devices, as the part that users can directly contact, has a strong impact on user experience, and users are increasingly demanding higher standards for the appearance of the casing.

[0003] In pursuit of lightweight design and low cost, current casing materials are mostly made of plastics and composite materials. Color paint layers are added to the surface of the casing material using methods such as spraying to enhance its appearance. For example, a primer layer, a color paint layer, and a topcoat layer can be sequentially formed on the surface of the casing material through spraying, with the color paint layer giving the casing the desired color.

[0004] However, the casings of current electronic devices are limited to a single color, and their color texture and gloss are poor. Summary of the Invention

[0005] This application provides a housing and an electronic device that allows for flexible design of the housing's appearance, color, gloss, transparency, etc., achieving a ceramic-like high-gloss glaze texture while possessing high stability and reliability.

[0006] The first aspect of this application provides a housing, including a base shell, a support layer, and an optical film layer. The support layer is located on one side of the base shell, and the optical film layer is disposed on the surface of the support layer opposite to the base shell. The optical layer includes a plurality of optical thin films. The optical thin films are composed of a dielectric layer. When a beam of light is incident on the optical thin film, reflection and refraction occur on two opposing surfaces of the optical thin film. By adjusting the molding material composition, thickness, and layer distribution of the optical thin films, the interference enhancement or reduction effect of the light reflected and refracted by the optical thin films can be controlled, thereby directionally adjusting the appearance effects such as color, gloss, transparency, and color perception that the housing can present, realizing the designability of the housing's appearance color, gloss, transparency, etc. This enhances the designability of the housing's appearance, allowing for flexible design according to actual appearance requirements. For example, by adjusting the layer group, composition, and thickness of the optical thin films, a ceramic-like high-gloss glaze texture effect can be obtained, enhancing the high-end feel of the housing's appearance and meeting users' high pursuit of appearance effects.

[0007] The support layer provides strength support for the optical film layer. For example, if the support layer is a film layer with high hardness, the optical film layer will also have high hardness. Depositing the optical film layer on a support layer with high hardness facilitates the formation of the optical film layer. It also helps to improve the adhesion between the optical film layer and the support layer, and reduces or avoids problems such as cracking of the optical film layer, thereby improving the stability and reliability of the optical film layer on the substrate.

[0008] The housing also includes a first treatment agent layer and a protective layer. The first treatment agent layer is disposed on the surface of the optical film layer opposite to the support layer, that is, the first treatment agent layer and the support layer are respectively disposed on two opposite surfaces of the optical film layer, and the protective layer is located on the side of the first treatment agent layer opposite to the optical film layer. The protective layer can protect the first treatment agent layer, optical film layer, support layer, etc. on the base shell, and improve the wear resistance of the film layer on the outer surface of the base shell.

[0009] The first treatment layer can enhance the adhesion between the optical film and the film layer (such as the protective layer) located on the surface of the first treatment layer facing away from the substrate. For example, taking the protective layer as an example, the first treatment layer can react with the optical film and the protective layer, forming chemical bonds, hydrogen bonds, van der Waals forces, etc., at the interfaces between the first treatment layer and the optical film, and between the first treatment layer and the protective layer, thereby enhancing the adhesion between the optical film and the protective layer. This further improves the stability and reliability of the optical film and protective layer on the substrate, enhances the stability and durability of the shell's appearance, and extends the shell's service life.

[0010] In one possible implementation, the shell further includes a stress transition layer disposed between the first treatment agent layer and the protective layer. The stress transition layer has a higher stress than the first treatment agent layer and a lower stress than the protective layer, allowing for a gradual transition in stress among the first treatment agent layer, the stress transition layer, and the protective layer. For example, the stress among the first treatment agent layer, the stress transition layer, and the protective layer can increase in a gradient, reducing or preventing problems such as cracking or detachment of the protective layer due to excessive stress differences, improving the reliability of the protective layer, and thus ensuring the high stability and reliability of each film layer on the base shell, improving the stability and durability of the shell's appearance.

[0011] In one possible implementation, the molding materials of the support layer and the first treatment agent layer include materials with active functional groups. That is, the molding materials of the support layer and the first treatment agent layer include atoms or groups that are readily reactive, thereby enabling the support layer and the first treatment agent layer to respectively possess…

[0012] A support layer with active functional groups and a first treatment agent layer are respectively disposed on the two opposite sides of the optical film layer. The optical film layer can be firmly bonded to the substrate or other film layers located between the outer surface of the substrate and the support layer through the support layer. The optical film layer can be firmly bonded to the film layer located on the side of the first treatment agent layer opposite to the substrate through the first treatment agent layer, which significantly improves the bonding force between the optical film layer and other film layers, and further improves the stability and reliability of the optical film layer on the substrate.

[0013] In one possible implementation, the shell also includes a coloring layer located between the base shell and the support layer. The coloring layer can display color, further enriching the shell's color design. Based on the coloring layer, combining it with optical film layers to design and adjust color, gloss, and transparency can further enhance the designability of the shell's appearance, improve its aesthetic effect, and enable the shell to achieve a better imitation ceramic high-gloss glaze texture.

[0014] In one possible implementation, the coloring layer includes a paint layer, which can be made of a coating material composed of pigments, fillers, etc. The composition is simple, making it easy to adjust the color, and the cost is low.

[0015] Alternatively, the coloring layer may include a metallic coating, which can create a metallic effect and exhibit a metallic luster. By layering an optical film on top of the metallic coating and adjusting the design of the color and gloss, the metallic luster and transparency of the casing can be enhanced, resulting in a better metallic appearance and a richer overall aesthetic.

[0016] Alternatively, the coloring layer may consist of layers of paint and metallic plating. The combined appearance of the paint and metallic plating layers allows for greater design flexibility in terms of casing color, gloss, and transparency, enriching the overall aesthetic appeal of the casing.

[0017] In one possible implementation, a second treatment agent layer is also included, which is disposed between the coloring layer and the base shell, i.e., the second treatment agent layer is disposed on the outer surface of the base shell.

[0018] The second treatment layer is formed from materials with active functional groups, giving it high reactivity. The second treatment layer can chemically react with the substrate and the coloring layer, forming chemical bonds, hydrogen bonds, and van der Waals forces at the interfaces between the second treatment layer and the substrate, and between the second treatment layer and the coloring layer. This enhances the adhesion between the coloring layer and each film layer to the substrate, ensuring the high stability and reliability of each film layer on the substrate.

[0019] The second treatment layer can also cover up unevenness and defects on the outer surface of the base shell, improve the smoothness of the outer surface of the base shell, facilitate the formation of each film layer on the outer surface of the base shell, and reduce or avoid wrinkles and cracks in each film layer due to defects, which is conducive to further improving the appearance of the shell.

[0020] In one possible implementation, the shell also includes a primer layer disposed between the coloring layer and the substrate. The primer layer can be a coating film made of a film-forming substance with high adhesion (such as an emulsion), fillers, solvents, etc., possessing high adhesion and ensuring the high stability of the coloring layer and each film layer on the substrate. The primer layer can also mask defects and imperfections on the outer surface of the substrate, improving the smoothness of the outer surface.

[0021] In one possible implementation, the material with active functional groups includes at least one of polyurethane resin, polycarbonate resin, and silane coupling agent. This ensures high adhesion between the optical film and other layers such as the substrate and protective layer, meeting the stability requirements of the optical film on the substrate.

[0022] In one possible implementation, the optical thin film is formed using at least one of Si, Cr, ZrO2, SiO2, Nb2O5, and TiO2, which gives the optical thin film high stability and reliability in its installation, high design flexibility in terms of color and gloss, and ease of implementation.

[0023] In one possible implementation, the optical film layer also includes a finishing layer and a base layer, with the base layer, several optical films, and the finishing layer stacked sequentially.

[0024] The finishing layer and the underlayer are formed from active materials, which can be substances with high chemical reactivity (or reactivity), making them highly reactive and easily react with other film layers. For example, the finishing layer can react chemically with the first treatment agent layer, and the underlayer can react chemically with the support layer. At the interfaces between the finishing layer and the first treatment agent layer, and between the underlayer and the support layer, chemical bonds, hydrogen bonds, van der Waals forces, and other forces are easily formed, enhancing the bonding force between the optical film layer and the first treatment agent layer and the support layer, and further improving the stability and reliability of the optical film layer.

[0025] In one possible implementation, the active material includes at least one of Si, Cr, Ni, ZrO2, and SiO2. This material exhibits both high affinity and adhesion to the optical thin film, and high activity, which is beneficial for improving the stability and reliability of the optical film.

[0026] In one possible implementation, the optical thin film is multi-layered, with at least two layers having different refractive indices. This improves the adjustability of the light interference effect of the light film layers and further enhances the designability and flexibility of the housing's exterior color.

[0027] Multiple optical thin films form multiple sets of refractive units stacked sequentially. Each set of refractive units includes multiple layers of optical thin films, with at least two layers having different refractive indices. This helps reduce design and molding difficulty while meeting the required appearance and color design requirements of the housing.

[0028] In one possible implementation, the optical film layer includes multiple sets of refractive units, each set comprising multiple layers of stacked optical thin films, with at least two layers having different refractive indices, and the optical thin films in the multiple sets of refractive units being identical. This richer distribution design of the optical thin films within the optical film layer enhances the freedom and flexibility in designing the exterior color of the casing.

[0029] In one possible implementation, the refractive index range of the molding material of the optical thin film is 0.5 to 3, which can well meet the needs of adjusting the color and gloss of the shell. The optical thin film also has high stability and reliability, which is conducive to achieving high stability and reliability of the optical film layer on the base shell and ensuring the durability of the shell's appearance.

[0030] In one possible implementation, the refractive index range of the molding material for the optical thin film is 1 to 2, which gives the housing a better appearance and durability, and can better achieve the ceramic-like high-gloss glaze texture effect of the housing.

[0031] A second aspect of this application provides an electronic device including a mid-frame and a back cover, the back cover being disposed on one side of the mid-frame, and at least one of the back cover and the mid-frame including any of the aforementioned housing components. By including the housing, the appearance, color, gloss, transparency, etc., can be designed flexibly according to the needs of the electronic device, such as achieving a ceramic-like high-gloss glaze texture. Furthermore, the housing appearance has high stability and durability, extending the lifespan of the electronic device and improving the user experience. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of an electronic device from one perspective, provided in an embodiment of this application.

[0033] Figure 2 for Figure 1 A schematic diagram of the disassembled structure of electronic devices in China;

[0034] Figure 3 for Figure 1 A schematic diagram of the structure of an electronic device from another perspective;

[0035] Figure 4 A partial cross-sectional structural diagram of a shell provided in an embodiment of this application;

[0036] Figure 5 A schematic diagram illustrating the formation of hydrogen bonds between a first treatment agent layer and an optical film layer, provided in an embodiment of this application;

[0037] Figure 6 A schematic diagram illustrating the path of light reflection and refraction by an optical film layer, provided for an embodiment of this application;

[0038] Figure 6a A light beam provided in the embodiments of this application Figure 6 A schematic diagram of the waveform where interference is enhanced after propagation through optical films and other materials;

[0039] Figure 6b A light beam provided in the embodiments of this application Figure 6 A schematic diagram of the waveform where interference weakens after propagation through optical films and other materials.

[0040] Figure 7 A partial cross-sectional view of an optical film layer, a support layer, and a first treatment agent layer stacked together, provided for an embodiment of this application;

[0041] Figure 8 This is a partial cross-sectional schematic diagram of the split structure of each film layer in another optical film layer provided in an embodiment of this application;

[0042] Figure 9 A partial cross-sectional structural diagram of another housing provided in an embodiment of this application;

[0043] Figure 10 A partial cross-sectional structural diagram of another shell provided in an embodiment of this application;

[0044] Figure 11 A partial cross-sectional structural diagram of another housing provided in an embodiment of this application;

[0045] Figure 12 A partial cross-sectional structural diagram of another housing provided in an embodiment of this application;

[0046] Figure 13 This is a partial cross-sectional structural diagram of another housing provided in an embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] 100 - Electronic devices;

[0049] 101 - Mid-frame;

[0050] 102 - Display screen;

[0051] 103 - Back cover;

[0052] 10-Shell;

[0053] 11-Base shell; 11a-Inner surface; 11b-Outer surface; 12-Supporting layer;

[0054] 13-Optical coating layer; 131-Optical thin film; 132-Finishing layer; 133-Underlay layer;

[0055] 14-First treatment agent layer; 15-Protective layer; 16-Stress transition layer;

[0056] 17-Coloring layer; 17a-Paint layer; 17b-Metallic plating layer; 18-Second treatment agent layer; 19-Primer layer. Detailed Implementation

[0057] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0058] This application provides an electronic device, which may include, but is not limited to, mobile phones, tablet personal computers, laptops, cameras, ultra-mobile personal computers (UMPCs), handheld computers, walkie-talkies, netbooks, POS machines, personal digital assistants (PDAs), wearable devices, virtual reality (VR) devices (such as VR glasses, VR headsets, etc.), augmented reality (AR) devices (such as AR glasses, AR headsets, etc.), in-vehicle devices, surveillance camera equipment, and other electronic devices with housings.

[0059] In this embodiment, a tablet computer is used as an example for illustration.

[0060] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application from one viewpoint.

[0061] See Figure 1 As shown, the electronic device 100 includes a mid-frame 101 and a display screen 102, which can be disposed on one side of the mid-frame 101. The display screen 102 is used to display information and provide an interactive interface for the user. The side of the display screen 102 facing away from the mid-frame 101 can serve as the display surface of the electronic device 100.

[0062] The display screen 102 may include, but is not limited to, an organic light-emitting diode (OLED) display screen, a micro organic light-emitting diode (MLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a light-emitting diode (LED) display screen, a mini organic light-emitting diode (Mini LED) display screen, a micro organic light-emitting diode (Micro LED) display screen, a quantum dot light-emitting diode (QLED) display screen, and a liquid crystal display (LCD), etc.

[0063] Figure 2 for Figure 1 A schematic diagram of the disassembled structure of electronic devices in China. Figure 3 for Figure 1 A schematic diagram of the structure of an electronic device from another perspective.

[0064] Among them, see Figure 2 As shown, the middle frame 101 can be a frame structure with an outer ring shape. The electronic device 100 can also include a back cover 103. The display screen 102 and the back cover 103 can be fixed on opposite sides of the middle frame 101 respectively.

[0065] In the embodiments of this application, for ease of description, as follows: Figure 2 As shown, the thickness direction of the electronic device 100 is defined as the z1 direction. For example, the display screen 102 and the back cover 103 can be located on opposite sides of the middle frame 101 along the thickness direction (z1 direction). The display screen 102 and the back cover 103 are fixed to the middle frame 101. The inner surface of the display screen 102 (the side facing away from the display surface), the inner surface of the middle frame 101, and the inner surface of the back cover 103 can form an accommodating space, which can be used to assemble and accommodate various structural components of the electronic device 100.

[0066] For example, the back cover 103 can be a rectangular plate-shaped structure. The outer contour shapes of the middle frame 101 and the display screen 102 can match the back cover 103. For example, the middle frame 101 can also be a frame structure with a rectangular outer contour, and the display screen 102 can also be a thin plate-shaped structure with a rectangular outer contour.

[0067] Of course, in some other examples, the outer contours of the back cover 103, the middle frame 101, and the display screen 102 can be square, circular, elliptical, rounded rectangle, etc.

[0068] The middle frame 101 and the back cover 103 can each serve as part of the housing of the electronic device 100, and the outer surface 11b of the middle frame 101 facing away from the accommodating space can serve as part of the exterior surface of the electronic device 100. Figure 3 As shown, the back cover 103 can serve as the exterior cover of the back of the electronic device 100, and the outer surface of the back cover 103 facing away from the display screen 102 can serve as part of the exterior surface of the electronic device 100.

[0069] In some examples, the middle frame 101 and the back cover 103 can be a single integrated structural component, that is, the middle frame 101 and the back cover 103 can be formed into a single integrated structural component by integral molding.

[0070] Alternatively, in some examples, the middle frame 101 and the back cover 103 can be separate structural components. After the middle frame 101 and the back cover 103 are formed separately, the middle frame 101 and the back cover 103 can be assembled together by welding, threaded connection, snap-fit ​​connection, interference fit, etc.

[0071] In some examples, the middle frame 101 may include a middle plate and a frame (not shown in the figure). The frame may be annular, and may surround the outer periphery of the middle plate. The frame, the back cover 103, and the display screen 102 form the aforementioned receiving space, within which the middle plate is located, providing support and assembly space for the various structural components. The circumferential outer surface of the frame may be the outer surface of the middle frame 101.

[0072] The middle plate and the frame can be separate structural components, which can be assembled together by welding, snap-fitting, or gluing after being formed separately. Alternatively, the middle plate and the frame can be an integral structural component, that is, the middle plate and the frame are formed into a single integrated structural component through integral molding.

[0073] Alternatively, in some examples, the middle frame 101 may not include the middle plate, and the middle frame 101 may be an internally hollow annular structure, with the outer surface of the middle frame 101 distributed circumferentially.

[0074] The electronic device 100 may also include a camera module for performing functions such as shooting, and at least a portion of the camera module may be located within the aforementioned accommodating space. The number of camera modules may be one, or multiple, to meet different shooting needs.

[0075] For example, see Figure 3 As shown, the camera module may include a rear camera module 104a. If at least a portion of the rear camera module 104a is located within the accommodating space, it may be disposed on the middle plate of the middle frame 101 or the inner surface of the display screen 102. The light inlet of the rear camera module 104a may be located on the outer surface of the rear cover 103 (i.e., the side facing away from the display screen 102).

[0076] The camera module may also include a front-facing camera module 104b (see reference). Figure 1 As shown, if at least a portion of the front camera module 104b is located within the accommodating space, it can be disposed on the inner surface of the middle plate of the middle frame 101 or the inner surface of the rear cover 103, and the light inlet of the front camera module 104b can be located on the display surface of the display screen 102.

[0077] The electronic device 100 may further include a main circuit board (not shown) and a battery (not shown), which are located within the aforementioned accommodating space. For example, the main circuit board and battery may be disposed on the middle frame 101. For instance, the main circuit board and battery may be disposed on the side of the middle plate of the middle frame 101 facing the rear cover 103, or the main circuit board and battery may be disposed on the side of the middle plate of the middle frame 101 facing the display screen 102.

[0078] The main circuit board may include a processor, a controller, and a memory. The processor may include one or more interfaces, which can be used to connect a charger to charge the electronic device 100, and can also be used to enable data transmission between the electronic device 100 and external devices, such as headphones, projectors, and audio equipment.

[0079] The electronic device 100 may also include a charging management module and a power management module (not shown in the figure), which may also be fixed within the aforementioned accommodating space.

[0080] The charging management module receives charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging examples, the charging management module receives charging input from the wired charger via an interface. In some wireless charging embodiments, the charging management module receives wireless charging input via the wireless charging coil of the electronic device 100. The charging management module can charge the battery and can also supply power to the electronic device 100 via the power management module.

[0081] The power management module connects the battery, charging management module, and processor. It receives input from the battery and / or charging management module to power the processor, memory, display, camera module, and other components. The power management module can also monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage current, impedance).

[0082] In some examples, the power management module may be located within the processor on the main board. In other examples, the power management module and the charging management module may be located in the same device.

[0083] The structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or arrange the components differently. For example, the electronic device 100 may also include communication modules, sensors, microphones, speakers, flashlights, and other devices.

[0084] In pursuit of lightweight design and cost reduction, current electronic devices often use plastics and composite materials as the base material for the back cover and mid-frame. A layer of colored paint is then sprayed onto the surface of this base material to enhance its appearance. For example, a primer layer, a colored paint layer, and a topcoat layer are layered sequentially on the surface of the base material. The colored paint layer can reflect light of specific wavelengths, allowing it to display the desired color, thus giving the back cover and mid-frame the desired appearance.

[0085] The exterior color is primarily achieved through the reflection of the paint layer, resulting in a relatively limited color range and poor design flexibility. Furthermore, the paint and plastic feel is pronounced, with low-quality colors, poor transparency and gloss, easily causing aesthetic fatigue and detracting from the overall appearance of the electronic device. It also struggles to achieve a near-ceramic high-gloss glaze finish on the casing, failing to meet users' aesthetic demands.

[0086] Based on this, this application provides a housing, including a base shell, a support layer, and an optical film layer located on the surface of the support layer opposite to the base shell. The optical film layer is composed of a dielectric layer. When light is incident on the optical film, it is reflected and refracted on two opposing surfaces. Different dielectric materials and different film thicknesses result in different refractive indices and transmittances. By adjusting the molding material, thickness, and layer distribution of the optical film, the interference enhancement or reduction effect of light reflected and refracted by the film layer can be controlled. This allows for the directional adjustment of the housing's appearance, including color, gloss, transparency, and hue, enabling design of the housing's gloss, color, and transparency. This improves the designability of the housing's appearance, allowing for flexible design based on actual aesthetic requirements. For example, by adjusting the layers, composition, and thickness of the optical film, a high-gloss ceramic glaze texture can be achieved, satisfying users' high demands for aesthetic appeal. The support layer provides strength support for the optical film layer. The optical film layer is formed by coating on the support layer with high hardness, which facilitates the formation of the optical film layer, improves the adhesion between the optical film layer and the support layer, and reduces or avoids problems such as cracking of the optical film layer, thereby improving the stability and reliability of the optical film layer on the substrate.

[0087] A first primer layer can be deposited on the surface of the optical film layer facing away from the support layer, and a protective layer can be deposited on the side of the first primer layer facing away from the substrate. The protective layer protects the films on the substrate and improves their wear resistance. The first primer layer can enhance the bonding force between the optical film layer and the films (such as the protective layer) located on the surface of the first primer layer facing away from the substrate. For example, chemical bonds, hydrogen bonds, and van der Waals forces are easily formed at the interfaces between the first primer layer and the optical film layer, and between the first primer layer and the protective layer, thus enhancing the bonding force between the optical film layer and the protective layer. This further improves the stability and reliability of the optical film layer and the protective layer on the substrate, enhances the stability and durability of the shell's appearance, and extends the shell's service life.

[0088] It should be noted that the housing provided in this application embodiment can be the mid-frame of an electronic device, or the housing can be the back cover of an electronic device, or the housing can be both the mid-frame and the back cover of an electronic device.

[0089] Figure 4 This is a partial cross-sectional structural diagram of a shell provided in an embodiment of this application.

[0090] See Figure 4 As shown, the housing 10 may include a base shell 11, which may include opposing inner surfaces 11a and outer surfaces 11b. For example, if the thickness direction of the base shell 11 is... Figure 4As shown in the z2 direction, the inner surface 11a and the outer surface 11b of the base shell 11 can be opposite each other in the thickness direction of the base shell 11. The housing 10 is used in an electronic device, and the inner surface 11a of the base shell 11 can serve as at least a portion of the inner surface 11a of the middle frame 101 and / or the back cover 103.

[0091] It should be noted that in some examples, such as when the housing 10 is the back cover of an electronic device, the thickness direction of the base shell 11 can be consistent with the thickness direction of the electronic device. In some examples, such as when the housing 10 is the middle frame of an electronic device, the thickness direction of the base shell 11 can intersect with the thickness direction of the electronic device, or the thickness direction of the base shell 11 can be perpendicular to the thickness direction of the electronic device.

[0092] The base shell 11 can be molded from materials such as plastics and composite materials. Of course, in some other examples, the base shell 11 can also be molded from materials such as glass, metal, and ceramics.

[0093] In some examples, the base shell 11 itself may have color, or in some examples, the base shell 11 itself may not have color, such as being colorless and transparent.

[0094] The housing 10 also includes a support layer 12, an optical film layer 13, a first treatment agent layer 14, and a protective layer 15. The support layer 12, the optical film layer 13, the first treatment agent layer 14, and the protective layer 15 are respectively located on one side of the base shell 11, such as on the outer surface 11b side of the base shell 11. The support layer 12, the optical film layer 13, the first treatment agent layer 14, and the protective layer 15 can be distributed sequentially along the z2 direction.

[0095] In some examples, the support layer 12 can be directly disposed on the outer surface 11b of the base shell 11. For example, the support layer 12 can be formed on the outer surface 11b of the base shell 11 by means of coating, spraying, screen printing, vapor deposition, sputtering, etc. The support layer 12 can be a bottom UV layer (ultraviolet curing layer), that is, after coating, a film layer with a certain hardness can be formed by ultraviolet curing.

[0096] Alternatively, in some examples, other membrane layers (such as...) may be provided between the support layer 12 and the outer surface 11b of the base shell 11. Figure 10 The coloring layer 17 (e.g.) and the support layer 12 can also be formed on other film layers by the above-described coating method.

[0097] An optical film 13 is disposed on the surface of the support layer 12 facing away from the substrate 11. For example, the optical film 13 can be formed on the surface of the support layer 12 facing away from the substrate 11 by sputtering. Specifically, the optical film 13 can be formed on the surface of the support layer 12 using a magnetron sputtering process.

[0098] Of course, in some other examples, the optical film layer 13 can also be formed on the surface of the support layer 12 away from the base shell 11 by other coating methods such as spraying, coating, screen printing, vapor deposition, etc.

[0099] The optical film layer 13 includes several optical thin films 131. Optical thin films 131, also known as optical membranes, are composed of dielectric layers and are a type of optical dielectric material that propagates light beams through interfaces. A single-layer optical thin film 131 can be a uniform dielectric thin layer with an approximately smooth surface. When a beam of light is incident on the optical thin film 131, reflection and refraction occur on two opposing surfaces of the optical thin film 131 (e.g., two opposing surfaces along the thickness direction z2).

[0100] Because the refractive index and transmittance of a film layer vary under different media materials and film thicknesses, the interference enhancement or reduction effect of light after refraction and reflection through the optical film layer 13 can be controlled by adjusting the molding material composition, thickness, and layer distribution of the optical thin film 131 in the optical film layer 13. This allows for targeted adjustment of the appearance effects of the housing 10, such as color, gloss, transparency, and hue, enabling design flexibility in the gloss, color, and transparency of the housing 10. This improves the designability of the housing appearance, allowing for flexible design based on actual appearance requirements and solving problems such as monotonous colors, low color quality, poor transparency, and low gloss in electronic device housings. For example, by adjusting the layer composition, composition, and thickness of the optical thin film 131, a high-gloss ceramic-like glaze texture can be achieved, enhancing the premium feel of the housing 10 and meeting users' high demands for aesthetic appeal.

[0101] For example, the molding material of the optical thin film 131 may include, but is not limited to, metals, non-metals and their oxides. For instance, the molding material of the optical thin film 131 may include Si, Cr, ZrO2, SiO2, Nb2O5, TiO2, etc., so that the optical film layer 13 has high setting stability and reliability, and high design flexibility in color, gloss, etc., which is easy to implement.

[0102] In some examples, the thickness of the optical film 13 can be 10nm to 2000nm, which facilitates the molding of the optical film 13 and helps to achieve high stability and high design flexibility of the optical film 13.

[0103] An optical film layer 13 is disposed on a support layer 12. The support layer 12 provides strength support for the optical film layer 13. If the support layer 12 is a film layer with a certain degree of hardness, the optical film layer 13 will also have a relatively high hardness. Depositing the optical film layer 13 on the support layer 12 with high hardness facilitates the forming of the optical film layer 13. It also helps to improve the adhesion between the optical film layer 13 and the support layer 12, and reduces or avoids problems such as cracking of the optical film layer 13, thereby improving the stability and reliability of the optical film layer 13 on the substrate 11.

[0104] The support layer 12 can also isolate the optical film layer 13 and the base shell 11 (or coloring layer), reducing the influence of the color of the base shell 11 (or coloring layer) on the adjustment of appearance color, gloss and color sense through the optical film layer 13, which is conducive to improving the control effect on appearance color, gloss and other aspects of the shell 10.

[0105] In some examples, the support layer 12 can also enhance the bonding force between the optical film layer 13 and the base shell 11 (or between the optical film layer 13 and other films located between the outer surface 11b of the base shell 11 and the support layer 12).

[0106] For example, the molding material of the support layer 12 may include a material with active functional groups, wherein active functional groups refer to atoms or groups in a molecule that are relatively reactive and easily undergo reactions. That is, the molding material of the support layer 12 includes atoms or groups that are easily reactive, so that the support layer 12 has high reactivity.

[0107] The support layer 12 may be attached to the base shell 11 or other membrane layers located between the outer surface 11b of the base shell 11 and the support layer 12 (such as...). Figure 10 The coloring layer 17 (e.g.) undergoes a chemical reaction, and the support layer 12 can also react chemically with the optical film layer 13. Taking the support layer 12 directly disposed on the base shell 11 as an example, chemical bonds, hydrogen bonds, van der Waals forces, etc., can be formed at the interfaces where the support layer 12 and the base shell 11, and the support layer 12 and the optical film layer 13 are connected, thereby enhancing the bonding force between the optical film layer 13 and the base shell 11, etc.

[0108] For example, the active functional groups in the molding material of the support layer 12 may include, but are not limited to, hydroxyl (-OH), ether (-O-), aldehyde (-CHO), carbonyl (>C=O), carboxyl (-COOH), amino (-NH2), etc.

[0109] For example, the molding material of the support layer 12 may include, but is not limited to, at least one of polyurethane resin, polycarbonate resin, and silane coupling agent. This ensures a high bonding force between the optical film layer 13 and the substrate 11, meeting the stability requirements of the optical film layer 13 on the substrate 11.

[0110] The first treatment agent layer 14 is disposed on the surface of the optical film layer 13 away from the support layer 12, that is, the first treatment agent layer 14 and the support layer 12 are respectively disposed on two surfaces of the optical film layer 13 that are opposite to each other along the thickness direction (z2 direction).

[0111] For example, a first treatment agent layer 14 can be formed on the surface of the optical film layer 13 away from the support layer 12 by means of coating such as spraying, coating, screen printing, vapor deposition, sputtering, etc.

[0112] The protective layer 15 is located on the side of the first treatment agent layer 14 that is away from the optical film layer 13. In some examples, the protective layer 15 can be directly disposed on the surface of the first treatment agent layer 14 that is away from the optical film layer 13. For example, the protective layer 15 can be formed on the surface of the first treatment agent layer 14 that is away from the optical film layer 13 by means of coating, coating, screen printing, vapor deposition, sputtering or other coating methods.

[0113] Alternatively, in some examples, other film layers (such as protective layer 15 and first treatment agent layer 14) may be provided between the protective layer 15 and the first treatment agent layer 14. Figure 9 The stress transition layer 16, etc., and the protective layer 15 can also be formed on other film layers by the above-mentioned coating method.

[0114] In this way, the protective layer 15 can be located on the outside of each film layer (on the side opposite to the base shell 11), and the protective layer 15 can be a topcoat layer. The protective layer 15 protects each film layer on the base shell 11, such as the first treatment agent layer 14, the optical film layer 13, and the support layer 12, improves the wear resistance of the film layer on the outer surface 11b of the base shell 11, and extends the service life of the shell 10.

[0115] It should be noted that the protective layer 15 and the first treatment agent layer 14 can be films with high light transmittance to ensure that light can pass through and be incident on the optical film layer 13, etc. For example, the molding material of the protective layer 15 may include, but is not limited to, polyurethane acrylate, polycarbonate, polyolefin resin, etc.

[0116] The first treatment layer 14 can enhance the adhesion between the optical film layer 13 and the film layer (such as the protective layer 15) located on the surface of the first treatment layer 14 facing away from the substrate 11. For example, the molding material of the first treatment layer 14 may include a material with active functional groups, that is, the molding material of the first treatment layer 14 includes atoms or groups that are easy to react, so that the first treatment layer 14 has high reactivity.

[0117] The first treatment agent layer 14 can chemically react with the optical film layer 13, and it can also chemically react with a film layer (such as the protective layer 15) located on the surface of the first treatment agent layer 14 facing away from the base shell 11. Taking the protective layer 15 as an example, reactions easily occur at the interfaces between the first treatment agent layer 14 and the optical film layer 13, and between the first treatment agent layer 14 and the protective layer 15, forming chemical bonds, hydrogen bonds, van der Waals forces, etc., thereby enhancing the bonding force between the optical film layer 13 and the protective layer 15. This further improves the stability and reliability of the optical film layer 13 and the protective layer 15 on the base shell 11, enhances the stability and durability of the shell 10's appearance, and extends the service life of the shell 10.

[0118] That is, a support layer 12 with active functional groups and a first treatment agent layer 14 can be respectively provided on the two opposite sides of the optical film layer 13, so that the optical film layer 13 can be firmly bonded to the base shell 11 or other film layers located between the outer surface 11b of the base shell 11 and the support layer 12 through the support layer 12, and the optical film layer 13 can be firmly bonded to the film layer located on the surface of the first treatment agent layer 14 opposite to the base shell 11 through the first treatment agent layer 14, which significantly improves the bonding force between the optical film layer 13 and other film layers, and further improves the stability and reliability of the optical film layer 13 on the base shell 11.

[0119] For example, the active functional groups in the molding material of the first treatment layer 14 may include, but are not limited to, hydroxyl (-OH), ether (-O-), aldehyde (-CHO), carbonyl (>C=O), carboxyl (-COOH), amino (-NH2), etc.

[0120] It should be noted that the molding materials of the first treatment agent layer 14 and the support layer 12 can be the same, or the molding materials of the two can be different. The hardness of the support layer 12 can be greater than the hardness of the first treatment agent layer 14.

[0121] For example, the molding material of the first treatment layer 14 may also include, but is not limited to, at least one of polyurethane resin, polycarbonate resin, and silane coupling agent. This ensures that the optical film layer 13 and the protective layer 15 have high adhesion, meeting the stability requirements of the optical film layer 13 on the substrate 11.

[0122] Figure 5 This is a schematic diagram illustrating the formation of hydrogen bonds between a first treatment agent layer and an optical film layer, as provided in an embodiment of this application.

[0123] For example, taking the molding material of the first treatment layer 14 as an example, which includes a silane coupling agent, the silane coupling agent has hydrolyzable groups, see [link to documentation]. Figure 5As shown, the hydrolyzable groups can form hydrogen bonds with the optical film 13 at the interface after hydrolysis. R in the silane coupling agent is an organic functional group that can react with the film layer on the surface of the first treatment agent layer away from the substrate, such as reacting with the protective layer, thereby improving the bonding force between the optical film 13 and the protective layer 15.

[0124] In examples where the molding materials of the support layer 12 and the first treatment agent layer 14 include polyurethane resin and / or polycarbonate resin, the polyurethane resin and polycarbonate resin can be polyurethane resin and polycarbonate resin with two or more functional groups, respectively. That is, the polyurethane resin and polycarbonate resin have two or more functional groups that can participate in the reaction, which is beneficial to further improve the bonding force between the optical film layer 13 and other film layers such as the base shell 11 and the protective layer 15.

[0125] In the embodiments of this application, the optical film layer 13 may consist of only a single-layer optical thin film 131, or, in some examples, the optical film layer 13 may include multiple layers of optical thin films 131. To facilitate understanding of the optical performance of the optical film layer 13, the following example illustrates the reflection and refraction path of light passing through the optical thin film 131, using the example of the optical film layer 13 consisting of a single-layer optical thin film 131 and the base shell 11 having an optical film layer 13 and a protective layer 15.

[0126] Figure 6 This is a schematic diagram illustrating the path of light reflection and refraction by an optical film layer, as provided in an embodiment of this application.

[0127] For example, see Figure 6 As shown, when light 1 from the environment is incident on the protective layer 15, it will be refracted and reflected at the interface of the protective layer 15 on the side away from the optical film layer 13. For example, the reflected light forms light 2, and the refracted light forms light 3. The reflected light 2 can exit to the side of the protective layer 15 away from the optical film layer 13 and enter the human eye.

[0128] Light ray 3 propagates within the protective layer 15, and is refracted and reflected at the interface between the protective layer 15 and the optical film layer 13. For example, reflection forms light ray 4, and refraction forms light ray 5. The reflected light ray 4 re-enters the protective layer 15 and is refracted at the interface of the protective layer 15 away from the optical film layer 13, thus exiting as light ray 6 to the outside of the protective layer 15 away from the optical film layer 13, and entering the human eye.

[0129] The refracted light ray 5 propagates within the optical film layer 13. At the interface where the optical film layer 13 meets the support layer 12, it will be refracted again (not shown in the figure) and reflected. If the reflected light ray 7 is formed, it will re-enter the optical film layer 13 and be refracted at the interface where the optical film layer 13 meets the protective layer 15. If the refracted light ray 8 is formed, it will propagate within the protective layer 15. It will be refracted again at the interface where the protective layer 15 meets the optical film layer 13. If the refracted light ray 9 is formed, it will be emitted to the side of the protective layer 15 away from the optical film layer 13 and enter the human eye.

[0130] After being refracted and reflected by the optical film layer 13 and the protective layer 15, the emitted light rays will interfere with each other. After the interference is superimposed, the light rays enter the human eye and are observed. For example, light rays 2, 6 and 9 mentioned above will interfere and superimpose, achieving the effect of interference enhancement or reduction, increasing or decreasing the amplitude of the light wave.

[0131] Figure 6a A light beam provided in the embodiments of this application Figure 6 A schematic diagram of the waveform where interference enhancement occurs after propagation through optical films and other materials. Figure 6b A light beam provided in the embodiments of this application Figure 6 A schematic diagram of the waveform where interference weakens after propagation through optical films and other materials.

[0132] See Figure 6a As shown, taking light rays 2 and 6 emitted after refraction and reflection through the aforementioned optical film layer 13 and protective layer 15 as an example, when the optical path difference between light rays 2 and 6 is an integer multiple of the wavelength of light, light rays 2 and 6 will produce interference enhancement, resulting in an increase in the apparent light intensity.

[0133] See Figure 6b As shown, when the optical path difference between light ray 2 and light ray 6 is not an integer multiple of the wavelength, light ray 2 and light ray 6 will interfere with each other, resulting in a decrease in the apparent light intensity.

[0134] As can be seen from the light refraction and reflection effects of the optical film layer 13, by adjusting the molding material composition, thickness and layer distribution of the optical thin film 131 in the optical film layer 13, the interference enhancement or reduction effect of the light after refraction and reflection by the optical film layer 13 can be controlled, thereby achieving the directional design of the appearance effects such as color, gloss and color sense of the shell.

[0135] Figure 7 This is a partial cross-sectional schematic diagram of an optical film layer, a support layer, and a first treatment agent layer stacked together, provided as an embodiment of this application.

[0136] See in some examples Figure 7As shown, the optical film layer 13 may also include a finishing layer 132 and a base layer 133, with a plurality of optical thin films 131 located between the base layer 133 and the finishing layer 132, and the base layer 133, the plurality of optical thin films 131, and the finishing layer 132 are stacked in sequence.

[0137] For example, the underlayer 133, a plurality of optical thin films 131 and the finishing layer 132 can be stacked sequentially on the surface of the support layer 12 away from the substrate. The underlayer 133 can be disposed adjacent to the support layer 12 and the finishing layer 132 can be disposed adjacent to the first treatment agent layer 14.

[0138] The optical thin film 131 can be a single layer, or it can be multiple layers, with multiple optical thin films 131 stacked sequentially. For example, Figure 7 The diagram shows an example where the optical film 131 in the optical film layer 13 is a three-layer structure. For example, the three-layer optical film 131 can be a first film layer 131a, a second film layer 131b, and a third film layer 131c. The first film layer 131a, the second film layer 131b, and the third film layer 131c can be stacked sequentially between the finishing layer 132 and the bottom layer 133.

[0139] The molding materials of the finishing layer 132 and the underlayer 133 can include, but are not limited to, highly reactive metals, non-metals, and their oxides. In some examples, the molding materials of the finishing layer 132 and the underlayer 133 can be the same as the molding material of the optical thin film 131. For example, the molding materials of the finishing layer 132 and the underlayer 133 can include Si, Cr, ZrO2, SiO2, Nb2O5, TiO2, etc. The finishing layer 132 and the underlayer 133 can also be used as the optical thin film 131.

[0140] Alternatively, in some examples, the molding material of the finishing layer 132 and the underlayer 133 may include active substances. These active substances can be chemically active substances, referring to substances with high chemical reactivity (or reactivity). This high activity of the finishing layer 132 and the underlayer 133 facilitates chemical reactions with other film layers. For example, the finishing layer 132 can react chemically with the first treatment agent layer 14, and the underlayer 133 can react chemically with the support layer 12. At the interfaces where the finishing layer 132 meets the first treatment agent layer 14, and the underlayer 133 meets the support layer 12, chemical bonds, hydrogen bonds, van der Waals forces, and other interactions are easily formed. This enhances the bonding strength between the optical film layer 13 and the first treatment agent layer 14 and the support layer 12, further improving the stability and reliability of the optical film layer 13.

[0141] For example, the molding materials of the finishing layer 132 and the bottom layer 133 may include Si, Cr, Ni, ZrO2, SiO2, etc., which have high affinity and adhesion to the optical film 131 on the one hand, and high activity on the other hand, which are more conducive to improving the stability and reliability of the optical film layer 13.

[0142] In the example where the optical thin film 131 has multiple layers, at least two of the optical thin films 131 may have different refractive indices, which helps to improve the adjustability of the light interference effect of the light film layer 13 and further enhances the designability and flexibility of the shell appearance color.

[0143] It should be noted that only two of the optical thin films 131 may have different refractive indices, while the refractive indices of the remaining optical thin films 131 may be the same. Alternatively, the refractive indices of the multiple optical thin films 131 may all be different.

[0144] It is understandable that the refractive index of the optical thin film 131 is related to the molding material and thickness of the optical thin film 131.

[0145] In some examples, the refractive index range of the molding material of the optical film 131 can be 0.5 to 3, which can well meet the needs of adjusting the color and gloss of the shell. The optical film 131 also has high stability and reliability, which is conducive to achieving high stability and reliability of the optical film layer 13 on the base shell and ensuring the durability of the shell's appearance.

[0146] For example, the refractive index range of the molding material of the optical thin film 131 can be 1 to 2, which gives the shell a better appearance and durability, and can better achieve the ceramic-like high-gloss glaze texture effect of the shell.

[0147] The number of optical thin films 131 included in the optical film layer 13, the thickness of each optical thin film 131, the refractive index of the molding material of each optical thin film 131, and the distribution of multiple optical thin films 131 with different refractive indices can be selected and set according to the actual needs of the shell color, gloss, etc.

[0148] Figure 8 This is a partial cross-sectional schematic diagram of the split structure of each film layer in an optical film layer provided in an embodiment of this application.

[0149] For example, in some examples, the multilayer optical thin film 131 can be arranged in a manner where multiple unit groups are distributed sequentially. Exemplarily, the multilayer optical thin film 131 in the optical film layer 13 can be divided into multiple groups of refractive units, such as... Figure 8The diagram shows two sets of refractive elements, such as refractive element 13a and refractive element 13b. There may also be one or more sets of refractive elements between refractive elements 13a and 13b. Of course, in some examples, the optical film 13 may only include two sets of refractive elements.

[0150] Multiple sets of refractive units can be stacked sequentially, and each set of refractive units can include multiple layers of optical thin films 131, which are stacked sequentially. In each set of refractive units, at least two layers of optical thin films 131 can have different refractive indices, which enriches the distribution design of the optical thin films in the optical film layers and helps to improve the freedom and flexibility of the design of the shell's appearance color.

[0151] For example, with Figure 8 Taking refractive unit 13a as an example, Figure 8 The diagram shows three optical thin films 131 included in the refractive unit 13a, such as a first thin film layer 131a, a second thin film layer 131b, and a third thin film layer 131c. One or more optical thin films 131 may also be present between the second thin film layer 131b and the third thin film layer 131c. Of course, in some examples, a refractive unit may include only two or three stacked optical thin films 131.

[0152] For example, the optical films 131 in multiple sets of refractive units can be the same. For instance, in any two sets of refractive units, the number of layers, distribution pattern, and refractive index of each optical film 131 can be the same. This helps to reduce the design and molding difficulty while meeting the appearance color design requirements of the housing.

[0153] For example, taking refractive unit 13a and refractive unit 13b as examples, other sets of refractive units can refer to refractive unit 13a and refractive unit 13b. Taking refractive unit 13a as an example, which includes three optical thin films 131: a first thin film layer 131a, a second thin film layer 131b, and a third thin film layer 131c, the refractive index of the first thin film layer 131a can be A, the refractive index of the second thin film layer 131b can be B, and the refractive index of the third thin film layer 131c can be X. The first thin film layer 131a, the second thin film layer 131b, and the third thin film layer 131c can be stacked sequentially. For example, the first thin film layer 131a can be disposed adjacent to the finishing layer 132, and the third thin film layer 131c can be disposed adjacent to the bottom layer 133.

[0154] The refractive unit 13b may also include a first thin film layer 131a with a refractive index of A, a second thin film layer 131b with a refractive index of B, and a third thin film layer 131c with a refractive index of X. The first thin film layer 131a, the second thin film layer 131b, and the third thin film layer 131c may be stacked sequentially. The first thin film layer 131a may be disposed adjacent to the finishing layer 132, and the third thin film layer 131c may be disposed adjacent to the bottom layer 133.

[0155] Figure 9 This is a partial cross-sectional structural diagram of another housing provided in an embodiment of this application.

[0156] See in some examples Figure 9 As shown, the housing 10 may further include a stress transition layer 16, which may be disposed between the first treatment agent layer 14 and the protective layer 15. The stress transition layer 16 may also be referred to as an intermediate paint layer. For example, the stress transition layer 16 may be formed on the surface of the first treatment agent layer 14 facing away from the optical film layer 13 (facing the protective layer 15) by means of coating such as spraying, coating, screen printing, vapor deposition, sputtering, etc.

[0157] It is understandable that, to meet the protection requirements of the film layer, the protective layer 15 is a wear-resistant film layer with a certain thickness and strength. The stress of the protective layer 15 is relatively large, and the stress difference between the protective layer 15 and the first treatment agent layer 14 is significant. In this embodiment, the stress of the film layer refers to the internal force generated between the various parts of the film layer when the film layer deforms due to changes in external factors (such as temperature). For example, when the temperature changes, each film layer will shrink and deform. The stress generated when the protective layer 15 shrinks and deforms is relatively large, while the stress generated when the first treatment agent layer 14 shrinks and deforms is relatively small. The stress difference between the two can easily lead to the protective layer 15 and the first treatment agent layer 14 cracking and detaching, resulting in cracks in the protective layer 15 and affecting its reliability.

[0158] A stress transition layer 16 is added between the protective layer 15 and the first treatment agent layer 14. The stress in the stress transition layer 16 can be greater than the stress in the first treatment agent layer 14, and the stress in the stress transition layer 16 can be less than the stress in the protective layer 15, so that the stress among the first treatment agent layer 14, the stress transition layer 16, and the protective layer 15 gradually changes. For example, the stress among the first treatment agent layer 14, the stress transition layer 16, and the protective layer 15 can increase in a gradient, reducing or avoiding problems such as cracking or detachment of the protective layer 15 due to excessive stress differences, improving the reliability of the protective layer 15, thereby ensuring the high stability and reliability of each film layer provided on the base shell 11, and improving the stability and durability of the appearance of the shell 10.

[0159] For example, the molding material of the stress transition layer 16 may include, but is not limited to, hydroxyl acrylic resin, thermoplastic acrylic resin, cellulose acetate butyrate (CAB), etc.

[0160] Figure 10 This is a partial cross-sectional structural diagram of another type of housing provided in an embodiment of this application.

[0161] In some examples, color designs are incorporated to enrich the housing 10. See also Figure 10 As shown, the housing 10 may also include a coloring layer 17, which may be located between the outer surface 11b of the base housing 11 and the support layer 12.

[0162] It is understood that in any of the examples above, a coloring layer 17 can be provided between the base shell 11 and the support layer 12. For example, in the example where the base shell 11 is provided with a support layer 12, an optical coating layer 13, a first treatment agent layer 14, and a protective layer 15 (see [reference]). Figure 4 As shown), a coloring layer 17 can be provided between the base shell 11 and the support layer 12. In the example described above where the base shell 11 is provided with a support layer 12, an optical coating layer 13, a first treatment agent layer 14, a stress transition layer 16, and a protective layer 15, see also... Figure 10 As shown, a coloring layer 17 can also be provided between the base shell 11 and the support layer 12.

[0163] The coloring layer 17 can reflect light of a specific wavelength, allowing it to display color and further enriching the color design of the housing 10. Based on the color displayed by the coloring layer 17, the design adjustments of color, gloss, and transparency by the optical film layer 13 can further enhance the designability of the appearance color of the housing 10, improve the appearance effect of the housing 10, and enable the housing 10 to achieve a better imitation ceramic high-gloss glaze texture effect.

[0164] For example, the coloring layer 17 can be disposed on the outer surface 11b of the base shell 11, and the support layer 12 can be disposed on the surface of the coloring layer 17 facing away from the base shell 11. For example, the coloring layer 17 can be formed on the outer surface 11b of the base shell 11 by means of coating, spraying, screen printing, vapor deposition, sputtering, etc., and the support layer 12 can be formed on the surface of the coloring layer 17 facing away from the base shell 11.

[0165] Alternatively, in some other examples, other film layers may be provided between the coloring layer 17 and the outer surface 11b of the substrate 11. For example, a second primer layer may be provided between the coloring layer 17 and the substrate 11 to improve the adhesion of the coloring layer 17 to the substrate 11. Alternatively, a primer layer may be provided between the coloring layer 17 and the substrate to improve the smoothness of the outer surface of the substrate 11 and ensure the stability of the coloring layer 17 and each film layer.

[0166] Figure 11 This is a partial cross-sectional structural diagram of another housing provided in an embodiment of this application.

[0167] See some examples. Figure 11 As shown, a second treatment agent layer 18 can be disposed between the coloring layer 17 and the outer surface 11b of the base shell 11. That is, the second treatment agent layer 18 is disposed on the outer surface 11b of the base shell 11, and the coloring layer 17 can be disposed on the surface of the second treatment agent layer 18 facing away from the base shell 11. For example, the second treatment agent layer 18 can be formed on the outer surface 11b of the base shell 11 by means of coating, spraying, vapor deposition, etc., and the coloring layer 17 can be formed on the surface of the second treatment agent layer 18 facing away from the base shell 11.

[0168] The second treatment agent layer 18 can enhance the bonding force between the coloring layer 17 and the substrate 11, thereby enhancing the bonding force between the coloring layer 17 and each film layer located on the side of the coloring layer 17 away from the substrate 11 and the substrate 11, ensuring the high stability and reliability of each film layer disposed on the substrate 11.

[0169] For example, the molding material of the second treatment layer 18 may include materials with active functional groups, that is, the molding material of the second treatment layer 18 includes atoms, groups, etc. that are prone to reaction, so that the second treatment layer 18 has high reactivity. The second treatment layer 18 can chemically react with the base shell 11, and the second treatment layer 18 can also chemically react with the coloring layer 17, such as forming chemical bonds, hydrogen bonds, van der Waals forces, etc. at the interfaces where the second treatment layer 18 and the base shell 11, and the second treatment layer 18 and the coloring layer 17 are connected, thereby improving the bonding force between the coloring layer 17 and each film layer and the base shell 11.

[0170] The second treatment agent layer 18 can also cover up unevenness and defects on the outer surface 11b of the base shell 11, improve the flatness of the outer surface 11b of the base shell 11, facilitate the formation of each film layer on the outer surface 11b of the base shell, and reduce or avoid wrinkles, cracks and other phenomena caused by defects, which is conducive to further improving the appearance of the shell 10.

[0171] The active functional groups in the molding material of the second treatment layer 18 may include, but are not limited to, hydroxyl (-OH), ether (-O-), aldehyde (-CHO), carbonyl (>C=O), carboxyl (-COOH), and amino (-NH2).

[0172] For example, the molding material of the second treatment layer 18 may include, but is not limited to, at least one of polyurethane resin, polycarbonate resin, and silane coupling agent. This ensures a high bonding force between the coloring layer 17 and the base shell 11, and satisfies the high stability of each film layer on the base shell 11.

[0173] The molding material of the second treatment agent layer 18 can be the same as that of the first treatment agent layer 14, or the molding materials of the two can be different.

[0174] Figure 12 This is a partial cross-sectional structural diagram of another housing provided in an embodiment of this application.

[0175] Or, in some examples, see Figure 12 As shown, a primer layer 19 can be provided between the coloring layer 17 and the outer surface 11b of the base shell 11. That is, the primer layer 19 is provided on the outer surface 11b of the base shell 11, and the coloring layer 17 can be provided on the surface of the primer layer 19 facing away from the base shell 11. For example, the primer layer 19 can be formed on the outer surface 11b of the base shell 11 by means of coating, coating, screen printing, vapor deposition, sputtering, etc., and the coloring layer 17 can be formed on the surface of the primer layer 19 facing away from the base shell 11.

[0176] For example, the primer layer 19 can be a coating layer formed by a film-forming substance with high adhesion (such as an emulsion), filler, solvent, etc., which has high adhesion and can ensure the high stability of the coloring layer 17 and each film layer on the substrate 11. The primer layer 19 can also cover defects and flaws on the outer surface 11b of the substrate, improving the smoothness of the outer surface 11b of the substrate.

[0177] In some examples, coloring layer 17 may include paint layer 17a (see reference). Figure 11 As shown, a second treatment agent layer 18 can be disposed between the paint layer 17a and the outer surface 11b of the base shell 11. The paint layer 17a can be a coating made of pigments, fillers, etc. The coating can be deposited on the side of the second treatment agent layer 18 away from the base shell 11 by means of spraying, screen printing, vapor deposition, sputtering, etc. The composition is simple, the color can be easily adjusted, and the cost is low.

[0178] Of course, in some examples, a primer layer 19 may be provided between the paint layer 17a and the outer surface 11b of the base shell 11.

[0179] For example, the paint layer 17a can be a single layer. Alternatively, the paint layer 17a can include multiple layers, which helps to improve the design flexibility of the color.

[0180] Alternatively, in some examples, the coloring layer 17 may include a metal plating layer 17b (see reference). Figure 12 As shown, a primer layer 19 may be provided between the metal plating layer 17b and the outer surface 11b of the base shell 11. Of course, in some examples, a second treatment agent layer 18 may be provided between the metal plating layer 17b and the outer surface 11b of the base shell 11.

[0181] The metal coating 17b can be a film formed by metal atoms through methods such as evaporation and sputtering. The metal coating 17b can present a metallic effect and exhibit a metallic luster. Based on the metal coating 17b, the optical film layer 13 is superimposed, and the design and adjustment of color, gloss, etc., can enhance the metallic luster and metallic transparency of the casing 10, giving the casing 10 a better metallic appearance and enriching the appearance of the casing 10.

[0182] For example, metal atoms can form a metal plating layer 17b on the surface of the primer layer 19 facing away from the base shell 11 by non-conductive vacuum metallization (NCVM), so that the metal plating layer 17b has a metallic texture and does not affect the communication transmission of electronic devices.

[0183] The metal coating 17b can be a single layer, or it can include multiple layers, which helps to improve the design flexibility of the metallic color.

[0184] For example, the molding material of the metal plating 17b may include metals such as In and Sn, which can give the housing 10 a better metallic sheen.

[0185] Figure 13 This is a partial cross-sectional structural diagram of another housing provided in an embodiment of this application.

[0186] Alternatively, in some examples, the paint layer 17a and the metal plating layer 17b can be combined to form the coloring layer 17. For example, see Figure 13 As shown, the coloring layer 17 may include a paint layer 17a and a metal plating layer 17b. The appearance color of the paint layer 17a and the appearance color of the metal plating layer 17b are superimposed, which helps to further enhance the design flexibility of the color, gloss and transparency of the housing 10 and enrich the appearance effect of the housing 10.

[0187] The paint layer 17a may be located between the metal plating layer 17b and the support layer 12, and a primer layer 19 may be present between the metal plating layer 17b and the outer surface 11b of the base shell 11. Alternatively, the metal plating layer 17b may be located between the paint layer 17a and the support layer 12, and a second treatment agent layer 18 may be present between the paint layer 17a and the outer surface 11b of the base shell 11.

[0188] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A housing characterized by, Comprise: a base shell (11); a support layer (12) located on one side of the base shell (11); an optical film layer (13) disposed on the surface of the support layer (12) away from the base shell (11), the optical film layer (13) comprising a plurality of optical thin films (131); a first treatment agent layer (14) disposed on the surface of the optical film layer (13) away from the support layer (12); a protective layer (15) located on the side of the first treatment agent layer (14) away from the optical film layer (13).

2. The housing of claim 1, wherein Further comprising a stress transition layer (16) disposed between the first treatment agent layer (14) and the protective layer (15); The stress of the stress transition layer (16) is greater than the stress of the first treatment agent layer (14), and the stress of the stress transition layer (16) is less than the stress of the protective layer (15).

3. The housing according to claim 1 or 2, characterized in that The forming material of the support layer (12) and the first treatment agent layer (14) comprises a material with active functional groups.

4. The housing according to any one of claims 1 to 3, characterized in that Further comprising a colored layer (17) located between the base shell (11) and the support layer (12).

5. The housing of claim 4, wherein, The colored layer (17) comprises a color paint layer (17a); Alternatively, the colored layer (17) comprises a metal plating layer (17b); or the colored layer (17) comprises a laminated color paint layer (17a) and a metal plating layer (17b).

6. The housing according to claim 4 or 5, characterized in that Further comprising a second treatment agent layer (18) disposed between the colored layer (17) and the base shell (11), the forming material of the second treatment agent layer (18) comprising a material with active functional groups.

7. The housing according to claim 4 or 5, characterized in that Further comprising a primer layer (19) disposed between the colored layer (17) and the base shell (11).

8. The housing according to claim 3 or 6, characterized in that The material with active functional groups comprises at least one of polyurethane resin, polycarbonate resin, and silane coupling agent.

9. The housing according to any one of claims 1-8, wherein, The forming material of the optical thin film (131) comprises at least one of Si, Cr, ZrO2, SiO2, Nb2O5, and TiO2.

10. The housing according to any one of claims 1-9, wherein, The optical film layer (13) further comprises a finishing layer (132) and a primer layer (133), the primer layer (133), a plurality of the optical thin film (131), and the finishing layer (132) are sequentially laminated; The forming material of the finishing layer (132) and the primer layer (133) comprises an active substance.

11. The case of claim 10, wherein, The active substance comprises at least one of Si, Cr, Ni, ZrO2, and SiO2.

12. The case of claim 10, wherein, The number of the optical thin film (131) is multiple layers, and the refractive index of at least two layers of the optical thin film (131) is different.

13. The case of claim 10, wherein, The optical film layer (13) comprises a plurality of groups of refractive units, each group of refractive units comprising a plurality of layers of the optical thin film (131) laminated, and the refractive index of at least two layers of the optical thin film (131) is different; The optical thin film (131) in a plurality of groups of refractive units is the same.

14. The housing according to any of claims 10-13, characterized in that The refractive index of the molding material of the optical film (131) ranges from 0.5 to 3.

15. An electronic device (100), characterized by The application relates to a mobile phone, which comprises a middle frame (101) and a back cover (103), wherein the back cover (103) is arranged on one side of the middle frame (101), and at least one of the back cover (103) and the middle frame (101) comprises the shell as claimed in any one of claims 1-14.

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