Shell and electronic equipment
By setting a conductive layer on the first surface of the metal substrate, the coverage area of the electrophoretic paint layer is expanded, solving the problem of uneven electrophoretic coating thickness and improving the protective performance and edge wear resistance of the shell.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LENOVO (BEIJING) LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-04-10
AI Technical Summary
Electrophoretic coatings can have uneven thickness at certain interfaces due to tension, which reduces their protective performance and makes them prone to edge corrosion, especially in harsh environments.
A conductive layer is provided on the first side of the metal substrate to expand the conductive range of the electrophoretic treatment, so that the electrophoretic paint layer covers the conductive layer, thereby enhancing the coverage of the electrophoretic paint layer and avoiding uneven thickness at the bonding area.
It improves the corrosion resistance and edge protection of the electrophoretic coating, reduces the risk of edge corrosion, and enhances the overall protective performance of the shell.
Smart Images
Figure CN224111402U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electronic equipment, in particular to a shell and electronic equipment. BACKGROUND
[0002] The electrophoretic coating is prone to uneven thickness at a specific interface due to tension, which reduces the protection performance, especially in harsh environments, and edge corrosion problems occur. CONTENT OF THE UTILITY MODEL
[0003] The purpose of the embodiments of the present application is to provide a shell and electronic equipment, mainly providing the following technical solutions:
[0004] The first aspect of the present application provides a shell, which comprises: a metal base material, the metal base material comprising: a first surface, a second surface in connection with the first surface and forming an included angle therebetween;
[0005] A topcoat coating is arranged on the first surface, and the topcoat coating comprises: a conductive layer;
[0006] An electrophoretic paint layer is arranged on the second surface and extends to the connection position of the first surface and the second surface and covers at least the conductive layer in the topcoat coating in the thickness direction.
[0007] In some modified embodiments of the first aspect of the present application, the topcoat coating comprises: a primer layer and a color paint layer arranged in layers, the primer layer forms the conductive layer, so that the electrophoretic paint layer covers at least the primer layer in the thickness direction.
[0008] In some modified embodiments of the first aspect of the present application,
[0009] The primer layer comprises: a first primer layer and a second primer layer arranged in layers;
[0010] At least the first primer layer has conductive properties, and the electrophoretic paint layer covers at least the first primer layer in the thickness direction.
[0011] In some modified embodiments of the first aspect of the present application, the color difference between the second primer layer and the color paint layer is not greater than a preset color difference value.
[0012] In some modified embodiments of the first aspect of the present application, the color of the first primer layer is the same as the color of the second primer layer; or,
[0013] The color of the first primer layer is black.
[0014] In some modified embodiments of the first aspect of the present application, the thickness of the part of the topcoat coating covered by the electrophoretic paint layer in the thickness direction is 15-20 μm.
[0015] In some implementation forms of the first aspect of the application, the thickness of the electrophoretic paint layer covering the portion of the second surface is 23-25 μm.
[0016] In some implementation forms of the first aspect of the application, the topcoat coating further comprises: a micro-arc oxidation layer disposed on the first surface, and the primer layer is laminated on the micro-arc oxidation layer.
[0017] In some implementation forms of the first aspect of the application, the topcoat coating further comprises: a polyurethane topcoat layer laminated on the color paint layer.
[0018] The second aspect of the application provides an electronic device, comprising: a housing, the housing comprising:
[0019] a metal base material, the metal base material comprising: a first surface, a second surface in communication with the first surface and forming an included angle therebetween;
[0020] a topcoat coating disposed on the first surface, the topcoat coating comprising: a conductive layer;
[0021] an electrophoretic paint layer disposed on the second surface and extending to the communication position of the first surface and the second surface and covering at least the conductive layer in the topcoat coating in the thickness direction. BRIEF DESCRIPTION OF DRAWINGS
[0022] The above and other objects, features and advantages of the example embodiments of the application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which several embodiments of the application are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:
[0023] Figure 1 Fig. 1 schematically shows a partial structure of a housing according to an embodiment of the application;
[0024] Figure 2 Fig. 2 schematically shows a partial structure of another housing according to an embodiment of the application;
[0025] BRIEF DESCRIPTION OF DRAWINGS
[0026] 1. metal base material; 101, first surface; 102, second surface;
[0027] 2. topcoat coating; 201, conductive layer; 202, primer layer 202; 2021, first primer layer; 2022, second primer layer; 203, color paint layer; 204, micro-arc oxidation layer; 205, polyurethane topcoat layer;
[0028] 3. electrophoretic paint layer. DETAILED DESCRIPTION
[0029] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0030] It should be noted that the technical terms or scientific terms used in the present application should be understood as their general meanings understood by those skilled in the art, unless otherwise specified.
[0031] Reference will now be made to the drawings, in which Figure 1 and the accompanying Figure 2 Embodiment One of the present application proposes a shell, comprising: a metal base material 1, the metal base material 1 comprising: a first face 101, a second face 102 in communication with the first face 101 and forming an included angle with the first face 101; a surface coating layer 2 disposed on the first face 101, the surface coating layer 2 comprising: a conductive layer 201; and an electrophoretic paint layer 3 disposed on the second face 102 and extending to the communication position of the first face 101 and the second face 102 and covering at least the conductive layer 201 in the surface coating layer 2 in the thickness direction.
[0032] The shell provided by the present embodiment can be a metal shell structure of an electronic device, which can be but is not limited to a notebook computer, a tablet computer, or a mobile phone, etc. Taking the electronic device as a notebook computer as an example, the shell can be an A shell of the notebook computer, or taking the electronic device as a tablet computer as an example, the shell can be a rear shell of the tablet computer. The shell is made of a metal base material 1, which can be a magnesium alloy base material or a titanium alloy base material, etc. Taking the magnesium alloy base material as an example, the use of magnesium alloy can make the shell have the advantages of light weight and superior heat dissipation. The metal base material 1 can be a flat plate structure, or can also be a shell structure forming a cavity. The metal base material 1 comprises a first face 101 and a second face 102 in communication with the first face 101. The first face 101 and the second face 102 form an included angle, which can be but is not limited to 90 degrees. The first face 101 and the second face 102 can be smoothly transitioned through the setting of a rounded corner. The second face 102 can comprise a rounded corner portion. The first face 101 can be a surface of the metal base material 1 extending in the length and width directions. The second face 102 can be a side surface of the metal base material 1 in the thickness direction.
[0033] In order to improve the appearance of the shell, the first surface 101 of the metal base 1 is provided with a finish coating 2, and the material of the finish coating 2 can be selected from epoxy resin, UV paint and the like, which can shield the first surface 101 of the metal base 1 and isolate the metal base 1 from direct contact with the external environment, improve the hardness and wear resistance of the metal base 1, prevent oxidation, corrosion and wear and tear, and set the color and gloss of the finish coating 2 according to requirements, such as blue or white, but not limited to this. The covering of the first surface 101 by the finish coating 2 can beautify the appearance of the shell and improve the texture. The second surface 102 of the metal base 1 is formed with an electrophoretic paint layer 3 to make the appearance of the shell have different visual effects on different surfaces. In processing, the finish coating 2 can be formed on the first surface 101 of the metal base 1, and then the second surface 102 of the metal base 1 is subjected to electrophoresis. When electrophoresis is performed, the finish coating 2 on the first surface 101 and other surfaces of the metal base 1 that do not need electrophoresis should be avoided. The metal base 1 is immersed in the electrophoretic paint liquid, ensuring that the second surface 102 is completely immersed. A direct current power supply is used, and the metal base 1 is used as a cathode (or anode, depending on the type of electrophoresis process). The charged coating particles in the electrophoretic paint liquid migrate and deposit on the second surface 102 of the metal base 1 under the action of the electric field. After the electrophoresis process is completed, the metal base 1 can be cleaned and dried. In theory, when electrophoresis is performed, the second surface 102 of the metal base 1 will form a uniform adhesive layer with the same thickness. However, due to the tension of the electrophoretic paint itself, uneven distribution of the electric field, differences in the concentration of the electrophoretic liquid, solvent evaporation and other factors, the electrophoretic paint layer 3 will often present a state similar to "water droplets" after baking and curing, that is, the thickness of the middle part is uniform, but the thickness of the junction between the electrophoretic paint layer 3 and the finish coating 2 is thinner. This uneven thickness phenomenon can cause the protection of the electrophoretic paint at the junction between the finish coating 2 and the electrophoretic paint layer 3 to fail easily, especially in high temperature and humidity, salt spray and other environments containing water vapor and corrosive liquids.
[0034] In order to solve the problem that the protection of the electrophoretic paint at the joint of the topcoat 2 and the electrophoretic paint layer 3 is easy to fail, in the technical solution of the present application, since the electrophoretic paint is deposited on the surface of the workpiece under the action of an electric field, the workpiece surface needs to have conductivity for the adhesion of the electrophoretic paint. In the solution of the present application, the thickness of the topcoat 2 is the increase of the size of the second surface 102 due to the connection relationship between the first surface 101 and the second surface 102. The conductive layer 201 can be arranged in the topcoat 2, so as to increase the conductive range when the electrophoretic treatment is performed on the second surface 102. When the electrophoretic treatment is performed, the coverage edge of the electrophoretic paint layer 3 can be further extended from the joint position of the first surface 101 and the second surface 102 to the position of the conductive layer 201 in the topcoat 2 in the thickness direction. The coverage range of the electrophoretic paint layer 3 is expanded, the joint position of the first surface 101 and the second surface 102 is no longer at the coverage edge of the electrophoretic paint layer 3, the thickness of the electrophoretic paint layer 3 at the joint position of the first surface 101 and the second surface 102 can be increased, so as to avoid the failure of the electrophoretic paint at the joint of the topcoat 2 and the electrophoretic paint layer 3, reduce the risk of edge shrinkage of the electrophoretic paint layer 3 attached to the second surface 102, improve the overall corrosion resistance and edge wear resistance of the electrophoretic paint layer 3, and improve the edge protection ability of the metal base material 1.
[0035] In some embodiments, the metal base material 1 is shown in FIG. 1. Figure 1 The conductive layer 201 is a functional layer with conductive performance. The conductive layer 201 can be formed by adding conductive performance to at least one original paint layer in the topcoat 2, or the conductive layer 201 can be an additional layer in the topcoat 2. Figure 2 The conductive layer 201 can be a metal layer formed by laser cladding, especially a metal layer with strong corrosion resistance, such as stainless steel, titanium alloy or aluminum alloy, but is not limited thereto.
[0036] In some embodiments, the metal base material 1 is shown in FIG. 1. Figure 1 The topcoat 2 includes a primer layer 202 and a color paint layer 203 arranged in layers. The primer layer 202 forms the conductive layer 201, so that the electrophoretic paint layer 3 covers at least the primer layer 202 in the thickness direction.
[0037] In order to improve the forming effect of the topcoat layer 2, and reduce the process difficulty and cost, the technical scheme adopted by the present application is that the topcoat layer 2 includes a primer layer 202 and a color paint layer 203 coated layer by layer, and the coverage of the primer layer 202 and the color paint layer 203 is the same; the primer layer 202 can enhance the adhesion between the color paint layer 203 and the metal substrate 1, and fill the small defects on the surface of the metal substrate 1, provide a flat substrate for uniform coating of the color paint layer 203, and improve the decorative and anti-rust and anti-corrosion functions of the topcoat layer 2; the primer layer 202 can be formed by using materials such as epoxy resin, polyurethane or high-temperature baking type paint, etc.; the color paint layer 203 is a paint layer with color, which can be water-based color paint, solvent-based color paint or powder coating, etc., and can provide a direct color perception for the first surface 101 of the metal substrate 1 to beautify the appearance effect; the primer layer 202 can form a conductive layer 201, for example, by using primer material with conductive performance, so that when performing electrophoresis treatment, the conductive area on the side where the second surface 102 is located is expanded to the thickness part corresponding to the primer layer 202, and the electrophoretic paint layer 3 covers at least the primer layer 202 in the thickness direction, so as to increase the coverage of the electrophoretic paint layer 3 and avoid the failure of the electrophoretic paint at the joint of the topcoat layer 2 and the electrophoretic paint layer 3.
[0038] In some embodiments, reference is made to the accompanying Figure 1 The primer layer 202 includes a first primer layer 2021 and a second primer layer 2022 arranged in layers, wherein at least the first primer layer 2021 has conductive performance, and the electrophoretic paint layer 3 covers at least the first primer layer 2021 in the thickness direction.
[0039] In order to improve the corrosion resistance, adhesion and other properties of the topcoat layer 2, the technical scheme adopted by the present application is that the primer layer 202 is arranged to include a first primer layer 2021 and a second primer layer 2022 coated layer by layer, and the coverage of the two primer layers 202 is the same, which can effectively seal the first surface 101 of the metal substrate 1, prevent rusting and corrosion of the metal substrate 1, and at the same time improve the flatness and smoothness of the topcoat layer 2, providing favorable conditions for the production of the topcoat layer 2; wherein the first primer layer 2021 can be made of conductive primer to make the first primer layer 2021 have conductive performance, so that the electrophoretic paint layer 3 can cover at least the first primer layer 2021 in the thickness direction after formation, and the second primer layer 2022 can be made of conductive primer or primer without conductive performance, which is not limited here; the color of the first primer layer 2021 can be black, and the extension of the second primer layer 2022 can be black or colored; when the colored second primer layer 2022 is arranged, the specific color can be set according to the color of the topcoat layer 2, but is not limited thereto.
[0040] In some embodiments, the color of the second primer layer 2022 matches the color of the color paint layer 203.
[0041] In order to avoid the problem of the second primer layer 2022 being exposed and forming a color difference with the color paint layer 203, affecting the appearance, in the technical solution adopted by the present application, the second primer layer 2022 can be set to a color, and the color is set according to the color of the color paint layer 203, that is, set to a color that matches the color paint layer 203, for example: the color of the second primer layer 2022 can be set to the same color as the color paint layer 203, so that there is no color difference between the second primer layer 2022 and the color paint layer 203, or the color of the second primer layer 2022 can be set to be similar to the color of the color paint layer 203, that is, there is no obvious color difference with the naked eye, that is, the colors of the second primer layer 2022 and the color paint layer 203 are consistent or have good matching.
[0042] In order to avoid the problem that the thickness of the first primer layer 2021 corresponds to the thickness of the part of the electrophoretic paint layer 3 covered, which is thin and easy to fail, causing the first primer layer 2021 to be exposed and forming a color difference with the color paint layer 203 and the second primer layer 2022, the color of the first primer layer 202 can also be set to be the same as or similar to the color of the second primer layer 2022, so that even if the part of the electrophoretic paint layer 3 covered by the thickness of the first primer layer 2021 fails, it will not cause obvious color difference, and the influence on the appearance of the metal base material 1 can be reduced.
[0043] In some embodiments, reference is made to the accompanying drawings Figure 1 In order to improve the reliability and effectiveness of the electrophoretic paint, the thickness of the part of the electrophoretic paint layer 3 covered by the thickness direction to the topcoat layer 2 can be 15-20pm, by limiting the thickness of the part of the topcoat layer 2 covered by the electrophoretic paint layer 3, it can ensure that the edge of the electrophoretic paint layer 3 has a reliable thickness, thereby reducing the risk of failure of the electrophoretic paint layer 3 at the edge; the thickness of the part of the electrophoretic paint layer 3 covering the second surface 102 can be 23-25pm, and the thickness of the electrophoretic paint layer 3 covering the second surface 102 is ensured to be the same everywhere, to improve uniformity, and by setting the electrophoretic paint layer 3 on the second surface 102 to be thick enough, it can further ensure that the thickness of the part of the electrophoretic paint layer 3 covered by the thickness direction to the topcoat layer 2, that is, by limiting the thickness of the middle region of the electrophoretic paint layer 3, even if the edge thickness of the electrophoretic paint layer 3 becomes thin after baking and curing due to the tension of the electrophoretic paint itself, the edge region can also have an effective thickness, reducing the risk of the electrophoretic paint layer 3 at the edge being too thin and easy to fail.
[0044] In some embodiments, reference is made to the accompanying drawings Figure 1 and the accompanying drawings Figure 2The topcoat layer 2 further comprises: a micro-arc oxidation layer 204 arranged on the first surface 101, and the primer layer 202 is arranged on the micro-arc oxidation layer 204.
[0045] In order to enhance the wear resistance of the metal base material 1, in the technical scheme adopted by the present application, a micro-arc oxidation layer 204 can be arranged on the first surface 101 of the metal base material 1. The micro-arc oxidation layer 204 is a special coating formed on the metal surface through micro-arc oxidation technology. Mainly under the matching adjustment of electrolyte and corresponding electrical parameters, a modified ceramic coating mainly composed of base metal oxides and supplemented by electrolyte components is grown on the first surface 101 of the metal base material 1 through the instantaneous high temperature and high pressure effect of arc discharge. The dense oxide film on the surface of the metal base material 1 has excellent chemical inertness, can effectively resist the corrosion of corrosive substances such as wet air, acid and alkali, and can improve the hardness and wear resistance of the metal base material 1. At the same time, it is beneficial to the adhesion and protection performance of the primer layer 202, further enhances the protection of the metal base material 1, and can improve the durability and service life of the overall coating on the metal base material 1.
[0046] In some embodiments, reference is made to the accompanying drawings that show by way of example Figure 1 and the accompanying drawings that show by way of example Figure 2 The topcoat layer 2 further comprises: a polyurethane topcoat layer 205 arranged on the color paint layer 203.
[0047] In order to further improve the performance and service life of the metal base material 1, in the technical scheme adopted by the present application, a polyurethane topcoat layer 205 can be arranged on the color paint layer 203. The polyurethane topcoat layer 205 is attached to the surface of the color paint layer 203 and has the same coverage range as the color paint layer 203. The main components of the polyurethane topcoat layer 205 can include synthetic resin, coloring pigment and curing agent. The polyurethane topcoat layer 205 formed by these components has excellent corrosion resistance, can effectively isolate the metal base material 1 and other coatings on its surface from contact with oxygen, moisture and other corrosive substances in the air, can make the metal base material 1 long-term effective in corrosion and rust prevention, and the hardness of the polyurethane topcoat is high, which can improve the hardness and wear resistance of the first surface 101 of the metal base material 1, enhance its stability and mechanical strength, and improve the aesthetics of the metal base material 1 through the luster and color of the polyurethane topcoat layer 205.
[0048] Embodiment two of the present application proposes an electronic device, which comprises the shell described above.
[0049] The technical scheme adopted in the present application is that the electronic device can be, but is not limited to, a notebook computer, and the shell can be used as the outer shell of the electronic device. The first surface 101 and the second surface 102 of the shell have different processes and appearance effects. The surface paint coating 2 of the first surface 101 can make the first surface 101 of the shell have good color, while the electrophoretic paint layer 3 of the second surface 102 can improve the corrosion resistance and appearance of the metal substrate 1. By arranging the conductive layer 201 in the surface paint coating 2, when the electrophoretic treatment is performed, the electrophoretic paint layer 3 formed can cover at least the conductive layer 201 in the surface paint coating 2 in the thickness direction. By increasing the coverage range of the electrophoretic paint layer 3, the thickness of the electrophoretic paint layer 3 at the joint position of the first surface 101 and the second surface 102 can be improved, thereby avoiding the risk of failure of the electrophoretic paint at the joint of the surface paint coating 2 and the electrophoretic paint layer 3, improving the overall corrosion resistance and edge wear resistance of the shell, and providing good protection and appearance for the electronic device.
[0050] For example, the electronic device is a notebook computer, the shell can be used as the A shell of the notebook computer, the first surface 101 can be used as the appearance surface of the notebook computer away from the display screen, and the second surface 102 can be the side surface surrounding the display screen and perpendicular to the display screen, thereby providing a good appearance effect for the notebook computer. For example, the electronic device is a mobile phone, the shell can be used as the outer shell of the mobile phone, the first surface can be the appearance surface of the back and side of the mobile phone away from the display screen, and the second surface can be the peripheral surface surrounding the display screen on the same side, but is not limited thereto.
[0051] It should be noted that, in the description of the present application, the terms "upper", "lower", and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms "connection", "installation", "fixation" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0052] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0053] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A housing, characterized in that, include: A metal substrate, the metal substrate comprising: a first surface and a second surface connected to the first surface and forming an angle between the two; A topcoat coating is disposed on the first surface, the topcoat coating comprising: a conductive layer; An electrophoretic coating layer is disposed on the second surface, extends to the junction of the first surface and the second surface, and covers at least the conductive layer in the topcoat coating in the thickness direction.
2. The housing according to claim 1, characterized in that, The topcoat coating includes: a primer layer and a color paint layer stacked together, wherein the primer layer forms the conductive layer, such that the electrophoretic paint layer covers at least the primer layer in the thickness direction.
3. The housing according to claim 2, characterized in that, The primer layer includes: a first primer layer and a second primer layer stacked together; Wherein, at least the first primer layer has conductive properties, and the electrophoretic paint layer covers at least the first primer layer in the thickness direction.
4. The housing according to claim 3, characterized in that, The color of the second primer layer matches the color of the paint layer.
5. The housing according to claim 4, characterized in that, The color of the first primer layer is the same as the color of the second primer layer; or, The first primer layer is black.
6. The housing according to claim 1, characterized in that, The thickness of the electrophoretic paint layer covering the portion of the topcoat coating in the thickness direction is 15-20 μm.
7. The housing according to claim 6, characterized in that, The thickness of the portion of the electrophoretic coating covering the second surface is 23-25 μm.
8. The housing according to claim 2, characterized in that, The topcoat coating further includes a micro-arc oxidation layer disposed on the first surface, and the primer layer is stacked and covers the micro-arc oxidation layer.
9. The housing according to claim 2 or 8, characterized in that, The topcoat coating further includes a polyurethane topcoat layer, which is layered and covers the color paint layer.
10. An electronic device, characterized in that, include: Housing, the housing comprising: A metal substrate, the metal substrate comprising: a first surface and a second surface connected to the first surface and forming an angle between the two; A topcoat coating is disposed on the first surface, the topcoat coating comprising: a conductive layer; An electrophoretic coating layer is disposed on the second surface, extends to the junction of the first surface and the second surface, and covers at least the conductive layer in the topcoat coating in the thickness direction.