Middle frame and electronic equipment
By installing an oxide film at the chamfer of the middle frame to connect the paint layer on the end surface and the outer side, the problem of the paint layer on the edge of the middle frame is easily dissipated, achieving higher wear resistance and aesthetics.
Patent Information
- Application Number
- CN202421010005.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The paint layer at the edges of the middle frame is prone to fall off and paint loss, which affects the aesthetics of electronic devices.
The oxide film is provided at the chamfer of the metal frame, and the oxide film connects the paint layer on the end surface and the paint layer on the outer side. The oxide film replaces the paint layer and connects smoothly to reduce the risk of paint loss.
It effectively reduces the possibility of paint loss on the surface of the middle frame, improves the wear resistance and adhesion of the paint layer, and enhances the aesthetics and service life of the middle frame.
Smart Images
Figure CN222515418U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of terminal technology, and in particular to a middle frame and an electronic device. Background Art
[0002] In electronic products, the middle frame can be used as an exterior part. The middle frame includes a metal frame and a paint layer. The paint layer covers the surface of the metal frame to improve the aesthetics of the middle frame. The paint layer covers the surface of the metal frame. The edges of the metal frame (the edges of the metal frame refer to the connection between two adjacent surfaces of the metal frame) are more susceptible to friction and damage, and the edges of the metal frame are also more likely to lose paint. Utility Model Content
[0003] The present application provides a middle frame and electronic device that are not prone to paint peeling.
[0004] In the first aspect, the present application discloses a middle frame, which includes a metal frame and a paint layer, the paint layer being provided on the surface of the metal frame, the surface of the metal frame including two end faces and an outer side face, the two end faces being provided opposite to each other along the thickness direction of the middle frame, one of the two end faces being used to connect a screen, the outer side face being connected between the two end faces, a chamfer being provided at the connection between any one of the two end faces and the outer side face; an oxide film being provided at the chamfer, the oxide film connecting the paint layers on two adjacent surfaces of the metal frame.
[0005] An oxide film is provided at the chamfer, and the oxide film connects the paint layer on the end face and the paint layer on the outer side face. The paint layer arranged on the outer side face and the paint layer arranged on the end face are smoothly connected through the oxide film. Since the oxide film is used instead of the paint layer at the chamfer, the paint will not fall off at the chamfer. The oxide film connects the paint layer on the end face and the paint layer on the side face, and the oxide film can make the paint layer on the outer side face and the paint layer on the end face transition smoothly, which can reduce the possibility of paint falling off at the connection between the end face and the chamfer, and can also reduce the possibility of paint falling off at the connection between the outer side face and the chamfer.
[0006] In combination with the first aspect, in a possible implementation, part of the oxide film covers the paint layer on the end face, and part of the oxide film covers the paint layer on the outer side face. This can make the oxide film and the paint layer on the outer side face transition smoothly, and can also make the oxide film and the paint layer on the end face transition smoothly, which can reduce the risk of paint peeling in the area of the paint layer on the outer side face close to the oxide film, and can also reduce the risk of paint peeling in the area of the paint layer on the end face close to the oxide film.
[0007] In combination with the first aspect, in a possible implementation, the paint layer disposed on the outer side surface and the paint layer disposed on the end surface are smoothly connected via the oxide film, which can further reduce the risk of paint peeling at the connection between the paint layer on the end surface and the oxide film, and can also reduce the risk of paint peeling at the connection between the paint layer on the outer side surface and the oxide film.
[0008] In combination with the first aspect, in a possible implementation, there are arc surfaces on both sides of the chamfer, and the connection between the chamfer and the end face is smoothly transitioned through the arc surface, and the connection between the chamfer and the outer side face is smoothly transitioned through the arc surface. This can make the connection between the chamfer and the end face and the outer side face smoother, and can make the connection between the oxide film provided at the chamfer, the paint layer provided on the end face, and the paint layer provided on the outer side face smoother, reduce the risk of paint peeling at the connection between the paint layer provided on the end face and the chamfer, and also reduce the risk of paint peeling at the connection between the paint layer provided on the outer side face and the chamfer.
[0009] In combination with the first aspect, in a possible implementation, the chamfer is a rounded corner, which can make the connection between the chamfer and the end face and the outer side face smoother, and can make the connection between the oxide film arranged at the chamfer, the paint layer arranged on the end face and the paint layer arranged on the outer side face smoother, thereby reducing the risk of paint peeling at the connection between the paint layer arranged on the end face and the chamfer, and can also reduce the risk of paint peeling at the connection between the paint layer arranged on the outer side face and the chamfer.
[0010] In combination with the first aspect, in a possible implementation, the chamfer includes a plane and two curved surfaces, the plane is connected between the two curved surfaces, and the plane is smoothly connected to the outer side surface and the end surface respectively through the two curved surfaces. This can make the connection between the oxide film arranged at the chamfer, the paint layer arranged on the end surface, and the paint layer arranged on the outer surface smoother, reduce the risk of paint peeling at the connection between the paint layer arranged on the end surface and the chamfer, and also reduce the risk of paint peeling at the connection between the paint layer arranged on the outer surface and the chamfer.
[0011] In combination with the first aspect, in a possible implementation, the oxide film has a thickness of 8 μm-15 μm. If the oxide film is too thin, for example, less than 8 μm, the protection of the oxide film is insufficient and the metal frame is easily corroded. If the oxide film is too thick, for example, greater than 15 μm, it is difficult to achieve a thicker oxide film by anodizing.
[0012] In combination with the first aspect, in a possible implementation, the thickness of the paint layer is 20 μm-30 μm. If the paint layer is set too thick, for example, greater than 30 μm, the paint layer is prone to flow marks, cracks, etc.; if the paint layer is set too thin, for example, less than 20 μm, the adhesion of the paint layer is insufficient, increasing the risk of the paint layer falling off and cracking, affecting the aesthetics of the middle frame.
[0013] In combination with the first aspect, in a possible implementation, the oxide film includes one of a magnesium-containing oxide film, an iron-containing oxide film, a zinc-containing oxide film, an aluminum-containing oxide film, and a titanium-containing oxide film. The oxide film can protect the metal frame and reduce the risk of the metal frame being corroded. At the same time, the oxide film can smoothly transition with the paint layer disposed on the end surface and the paint layer disposed on the outer surface, reducing the risk of paint peeling of the paint layer disposed on the end surface and the paint layer disposed on the outer surface.
[0014] In a second aspect, the present application provides an electronic device, comprising a screen and the middle frame described in the first aspect, wherein the middle frame is used to support the screen. In this solution, an oxide film is provided at the chamfer of the metal frame, and the oxide film can make the paint layer on the outer surface and the paint layer on the end surface transition smoothly, and can reduce the possibility of paint falling off at the connection between the end surface and the chamfer, and can also reduce the possibility of paint falling off at the connection between the outer side surface and the chamfer. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.
[0016] Figure 1 A schematic diagram of the structure of an electronic device is provided for an embodiment of the present application;
[0017] Figure 2 A schematic diagram of a three-dimensional structure of a middle frame provided in an embodiment of the present application;
[0018] Figure 3 A cross-sectional view of a middle frame provided in one embodiment of the present application;
[0019] Figure 4 A cross-sectional view of another middle frame provided in an embodiment of the present application;
[0020] Figure 5 A cross-sectional view of another middle frame provided in an embodiment of the present application;
[0021] Figure 6 It is a schematic diagram of the structure of the paint layer attached to the surface of the metal frame;
[0022] Figure 7 The schematic diagram is a structural diagram of forming a chamfer at the connection between the end face and the outer side face of the metal frame.
[0023] Description of reference numerals:
[0024] 1000, electronic device; 100, middle frame; 110, metal frame; 111, outer side; 112, end face; 120, paint layer; 130, chamfer; 131, plane; 132, curved surface; 140, oxide film; 200, screen. DETAILED DESCRIPTION
[0025] The middle frame can be applied to electronic devices, and the middle frame can be used to accommodate some electronic parts of the electronic devices, such as circuit boards, etc. The middle frame can also support the screen of the electronic device. In order to improve the aesthetics of the middle frame, a paint layer is provided on the surface of the middle frame. At present, the paint at the edges of the middle frame has a high wear resistance and is difficult to withstand long-term friction. The paint at the edges of the middle frame is prone to falling off. The edges of the middle frame refer to the junction of two adjacent surfaces of the middle frame, and the two adjacent surfaces of the middle frame can be two different planes.
[0026] When the middle frame is applied to an electronic device, the edges of the middle frame are easily rubbed. For example, when the electronic device is moving, the edges of the middle frame are easily rubbed and paint may fall off, which will affect the appearance of the entire electronic device.
[0027] In view of this, the present application provides a middle frame and an electronic device, aiming to solve the problem of paint peeling easily on the surface of the middle frame.
[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.
[0029] See also Figure 1 , Figure 1 A structural schematic diagram of an electronic device 1000 is provided for an embodiment of the present application. The electronic device 1000 may be a mobile phone, a tablet computer, a watch, etc. The electronic device 1000 includes a middle frame 100 and a screen 200. The middle frame 100 can accommodate some electronic parts in the electronic device 1000. The middle frame 100 can also support the screen 200. The screen 200 is connected to the middle frame 100 on one side in the thickness direction of the electronic device 1000.
[0030] See also Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a three-dimensional structure of a middle frame 100 provided in an embodiment of the present application. Figure 3 A cross-sectional view of a middle frame provided in one embodiment of the present application. The middle frame 100 includes a metal frame 110 and a paint layer 120, the paint layer 120 is disposed on the surface of the metal frame 110, the metal frame 110 includes two end faces 112 and an outer side face 111, the two end faces 112 are disposed opposite to each other along the thickness direction of the electronic device 1000, and the outer side face 111 is connected between the two end faces 112. It can be understood that the paint layer 120 can cover the two end faces 112 of the metal frame 110, and the paint layer 120 can also cover the outer side face 111 of the metal frame 110.
[0031] A chamfer 130 is provided at the connection between any one of the two end faces 112 and the outer side face 111. The provision of the chamfer 130 enables a smooth transition between the end face 112 and the outer side face 111. In the embodiment provided in the present application, an oxide film 140 is provided at the chamfer 130, and the oxide film 140 connects the paint layer 120 on the end face 112 and the paint layer 120 on the outer side face 111. The paint layer 120 provided on the outer side face 111 and the paint layer 120 provided on the end face 112 are smoothly connected through the oxide film 140. Since the oxide film 140 is used instead of the paint layer 120 at the chamfer 130, the paint will not fall off at the chamfer 130. The oxide film 140 connects the paint layer 120 on the end face 112 and the paint layer 120 on the side face. The oxide film 140 can make the paint layer 120 located on the outer side surface 111 and the paint layer 120 located on the end face 112 transition smoothly, which can reduce the possibility of paint peeling at the connection between the end face 112 and the chamfer 130, and can also reduce the possibility of paint peeling at the connection between the outer side surface 111 and the chamfer 130.
[0032] See also Figure 4 and Figure 5 In the embodiment provided in the present application, there are arc surfaces on both sides of the chamfer 130, and the connection between the chamfer 130 and the end face 112 is smoothly transitioned through the arc surface, and the connection between the chamfer 130 and the outer side face 111 is smoothly transitioned through the arc surface. Specifically, the outer side face 111 is smoothly connected to one arc surface of the chamfer 130, and the end face 112 is smoothly connected to one arc surface of the chamfer 130. The connection between the chamfer 130 and the end face 112 and the outer side face 111 is smoother, which can make the oxide film 140 set at the chamfer 130, the paint layer 120 set on the end face 112 and the paint layer 120 set on the outer side face 111 connect more smoothly, reduce the risk of paint peeling at the connection between the paint layer 120 set on the end face 112 and the chamfer 130, and can also reduce the risk of paint peeling at the connection between the paint layer 120 set on the outer side face 111 and the chamfer 130.
[0033] In some embodiments, please participate Figure 4 The chamfer 130 may be a rounded corner, which can make the connection between the chamfer 130 and the end face 112 and the outer side face 111 smoother, and can make the connection between the oxide film 140 disposed at the chamfer 130, the paint layer 120 disposed on the end face 112, and the paint layer 120 disposed on the outer side face 111 smoother, reduce the risk of paint peeling at the connection between the paint layer 120 disposed on the end face 112 and the chamfer 130, and also reduce the risk of paint peeling at the connection between the paint layer 120 disposed on the outer side face 111 and the chamfer 130. One side of the rounded corner is connected to one end face 112 of the metal frame 110, and the other side of the rounded corner is connected to the outer side face 111 of the metal frame 110.
[0034] In some embodiments, see Figure 5 The chamfer 130 includes a plane 131 and two curved surfaces 132, the plane 131 is connected between the two curved surfaces 132, and the two sides of the plane 131 are smoothly connected to the two curved surfaces 132. The plane 131 is smoothly connected to the outer side surface 111 and the end surface 112 through the two curved surfaces 132. In this way, when the oxide film 140 is set at the chamfer 130, the paint layer 120 on the end surface 112 of the metal frame 110 and the paint layer 120 on the outer side surface 111 of the metal frame 110 can also be smoothly transitioned through the oxide film 140, which can reduce the risk of paint falling off on the end surface 112 of the metal frame 110 and the outer side surface 111 of the metal frame 110.
[0035] In some embodiments, the thickness of the paint layer 120 is 20μm-30μm. It should be noted that the present application can form the paint layer 120 on the metal frame 110 by electrophoresis. If the paint layer 120 is set too thick, for example, greater than 30μm, the paint layer 120 is prone to flow marks, cracks and the like; if the paint layer 120 is set too thin, for example, less than 20μm, the adhesion of the paint layer is insufficient, which increases the risk of the paint layer falling off and cracking, and affects the aesthetics of the middle frame 100.
[0036] In the embodiment provided in the present application, the metal frame 110 may include a frame and a bottom cover, the frame is connected to one side of the bottom cover along the thickness direction, the surface of the frame facing away from the bottom cover may be an end surface 112 of the metal frame 110, and the surface of the bottom cover facing away from the frame may serve as another end surface 112 of the metal frame 110.
[0037] The metal frame 110 includes one of aluminum alloy, zinc alloy, iron alloy, titanium alloy, and magnesium alloy. Anodizing the chamfer 130 of the metal frame 110 can produce an oxide film 140 .
[0038] Part of the oxide film 140 covers the paint layer 120 on the end face, and part of the oxide film 140 covers the paint layer 120 on the outer side. Specifically, one side of the oxide film 140 covers the paint layer 120 on the end face, and the other side of the oxide film 140 covers the paint layer 120 on the outer side. The oxide film 140 and the paint layer 120 disposed on the outer side can be smoothly transitioned, and the oxide film 140 and the paint layer 120 disposed on the end face can be smoothly transitioned, and the probability of paint peeling in the area of the paint layer 120 on the outer side close to the oxide film 140 can be reduced, and the probability of paint peeling in the area of the paint layer 120 on the end face close to the oxide film 140 can be reduced.
[0039] The oxide film 140 smoothly transitions with the paint layer 120 on the end surface, which can reduce the risk of paint peeling at the connection between the paint layer 120 on the end surface and the oxide film 140. The oxide film 140 also smoothly transitions with the paint layer 120 on the outer surface, which can reduce the risk of paint peeling at the connection between the paint layer 120 on the outer surface and the oxide film 140.
[0040] In the embodiment provided in the present application, the thickness of the oxide film 140 is 8μm-15μm. In the present application, the metal frame 110 is mainly made of metal. When the oxide film 140 is formed, the oxide film 140 is formed at the chamfer 130 by anodizing. If the oxide film 140 is too thin, for example, less than 8μm, the protective strength of the oxide film 140 is insufficient, and the metal frame 110 is easily corroded. If the oxide film 140 is too thick, for example, greater than 15μm, it is difficult to achieve a thicker oxide film 140 by anodizing.
[0041] The oxide film 140 is a metal oxide film, which has the properties of not easy to fall off and not easy to be corroded. The oxide film 140 is arranged at the chamfer 130, which can enhance the metal texture of the middle frame 100. After the chamfer 130 is formed at the connection between the end face and the outer side of the middle frame 100, the chamfer 130 can be subjected to a highlight treatment. When the oxide film 140 is arranged at the chamfer 130, the middle frame 100 can have a highlight edge effect. After the chamfer 130 is formed at the connection between the end face and the outer side of the middle frame 100, the chamfer 130 may not be subjected to a highlight treatment, and this application does not make specific limitations on this.
[0042] In the embodiment provided in the present application, the oxide film 140 includes one of a magnesium oxide film, an iron oxide film, a zinc oxide film, an aluminum oxide film, and a titanium oxide film. In the present application, the oxide film 140 can protect the metal frame 110 and reduce the risk of corrosion of the metal frame 110. At the same time, the oxide film 140 can smoothly transition with the paint layer 120 disposed on the end surface and the paint layer 120 disposed on the outer surface, reducing the risk of paint peeling of the paint layer 120 disposed on the end surface and the paint layer 120 disposed on the outer surface.
[0043] The magnesium-containing oxide film may include MgO and MgAL2O4.
[0044] The iron-containing oxide film may include FeO, Fe3O4, and Fe2O3. The iron-containing oxide film 140 may include three layers. The first layer, the second layer, and the third layer are FeO, Fe3O4, and Fe2O3, respectively. The first layer is the layer closest to the metal frame 110.
[0045] The zinc-containing oxide film may include ZnO.
[0046] The aluminum-containing oxide film may include Al2O3.
[0047] The titanium-containing oxide film may include TiO2.
[0048] It should be noted that if the metal frame 110 is a magnesium alloy, anodizing the metal frame 110 can generate a magnesium-containing oxide film. If the metal frame 110 is an iron alloy, anodizing the metal frame 110 can generate an iron-containing oxide film. If the metal frame 110 is a zinc alloy, anodizing the metal frame 110 can generate a zinc-containing oxide film. If the metal frame 110 is an aluminum alloy, anodizing the metal frame 110 can generate an aluminum-containing oxide film. If the metal frame 110 is a titanium alloy, anodizing the metal frame 110 can generate a titanium-containing oxide film.
[0049] In the present application, the middle frame 100 may be formed by the following steps:
[0050] The metal frame 110 is formed by machining a plate.
[0051] The surface of the metal frame 110 is polished.
[0052] The surface of the metal frame 110 is sandblasted.
[0053] After sandblasting, the metal frame 110 is subjected to electrophoresis treatment so that the paint layer 120 is attached to the surface of the metal frame 110 .
[0054] The metal frame 110 is processed by a computer numerical control (CNC) machine tool to form a chamfer 130 at the connection between the end surface and the outer side surface of the metal frame 110 .
[0055] An oxide film 140 is formed at the chamfer 130 .
[0056] In the present application, taking the plate material as an aluminum alloy as an example, when the plate material is mechanically processed to form the metal frame 110, the plate material can be formed into an aluminum plate profile by aluminum extrusion.
[0057] The inner cavity is formed by CNC processing the aluminum sheet profile to form the preliminary structure of the metal frame 110. The preliminary structure of the metal frame 110 can also be formed by stamping and rough forming the aluminum sheet profile.
[0058] During the process of grinding the surface of the metal frame 110 , gauze may be mounted on a grinding machine and rotated at high speed to grind the surface of the metal frame 110 until the surface machining lines are eliminated, making the surface of the metal frame 110 smoother.
[0059] Please attend Figure 6 , Figure 6This is a structural schematic diagram of a paint layer 120 attached to the surface of a metal frame 110. During the process of sandblasting the surface of the metal frame 110, the polished metal frame 110 is placed in a sandblasting machine for sandblasting, and then the metal frame 110 is electrophoretically treated so that the paint layer 120 is attached to the surface of the metal frame 110.
[0060] See also Figure 7 , Figure 7 The structural schematic diagram of forming a chamfer 130 at the connection between the end face and the outer side face of the metal frame 110 is shown. When the metal frame 110 is processed by CNC to form the chamfer 130 at the connection between the end face and the outer side face of the metal frame 110, the chamfer 130 can be subjected to a highlight treatment by CNC, and the highlight treatment method includes a chemical or electrochemical method to achieve the highlight treatment. When forming the chamfer, the metal frame 110 can be cut by a diamond knife to form the chamfer 130, and the chamfer can also be formed at the connection between the end face and the outer side face by grinding, chemical etching, etc. When the metal frame 110 is processed to form the chamfer 130, the paint layer 120 at the connection between the outer side face of the metal frame 110 and the end face 112 of the metal frame 110 is removed, and the chamfer 130 is formed at the connection between the outer side face of the metal frame 110 and the end face of the metal frame 110.
[0061] A chamfer 130 is formed at the connection between each of the two end surfaces 112 of the metal frame 110 and the outer side surface.
[0062] In the embodiment provided in the present application, the chamfer 130 is anodized to form an oxide film 140 .
[0063] In the embodiment provided in the present application, a chamfer 130 is formed at the connection between the end face 112 and the outer side surface of the metal frame 110, the metal frame 110 is not easy to lose paint, and the wear resistance of the paint layer 120 on the end face of the metal frame 110 and the paint layer 120 on the outer side surface 111 is improved. After the chamfer 130 of the metal frame 110 is anodized, the processed middle frame 100 shell is placed in a vibration wear resistance test environment, and the paint on the edges does not fall off within 3 hours of vibration wear resistance.
[0064] The first, second, third, fourth and various numerical numbers involved in this document are only distinguished for the convenience of description and are not intended to limit the scope of the present application.
[0065] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
[0066] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A middle frame, characterized in that: It comprises a metal frame and a paint layer, wherein the paint layer is arranged on the surface of the metal frame, and the surface of the metal frame comprises two end faces and an outer side face, wherein the two end faces are arranged opposite to each other along the thickness direction of the middle frame, and one of the two end faces is used for connecting a screen, and the outer side face is connected between the two end faces, and a chamfer is arranged at the connection between any one of the two end faces and the outer side face; an oxide film is arranged at the chamfer, and the oxide film connects the paint layers on two adjacent surfaces of the metal frame.
2. The middle frame according to claim 1, characterized in that: A partial area of the oxide film covers the paint layer on the end surface, and a partial area of the oxide film covers the paint layer on the outer side surface.
3. The middle frame according to claim 1 or 2, characterized in that: The paint layer arranged on the outer side surface and the paint layer arranged on the end surface are smoothly connected through the oxide film.
4. The middle frame according to claim 1 or 2, characterized in that: There are arc surfaces on both sides of the chamfer, and the connection between the chamfer and the end surface is smoothly transitioned through the arc surface, and the connection between the chamfer and the outer side surface is smoothly transitioned through the arc surface.
5. The middle frame according to claim 4, characterized in that: The chamfer is a rounded corner.
6. The middle frame according to claim 1, characterized in that: The chamfer includes a plane and two arc surfaces, the plane is connected between the two arc surfaces, and the plane is smoothly connected to the outer side surface and the end surface respectively through the two arc surfaces.
7. The middle frame according to claim 1, characterized in that: The thickness of the oxide film is 8 μm-15 μm.
8. The middle frame according to claim 1 or 7, characterized in that: The thickness of the paint layer is 20 μm-30 μm.
9. The middle frame according to claim 1, characterized in that: The oxide film includes one of a magnesium-containing oxide film, an iron-containing oxide film, a zinc-containing oxide film, an aluminum-containing oxide film, and a titanium-containing oxide film.
10. An electronic device, characterized in that: It comprises a screen and a middle frame as described in any one of claims 1 to 9, wherein the middle frame is used to support the screen.