Middle frame, manufacturing method thereof and electronic equipment

Abstract

The invention provides a middle frame, a manufacturing method thereof and electronic equipment, the middle frame can comprise a frame, the frame comprises at least one first material part and at least one second material part, the first material parts and the second material parts are connected at intervals to form the frame, and the manufacturing materials of the first material parts comprise fiber composite materials. The manufacturing materials of the second material part comprise an insulating material and pigment, and the color difference between the second material part and the first material part is smaller than a threshold value, so that the color difference between the second material part and the first material part is small, the second material part and the first material part are the same in color when seen by naked eyes, and the second material part and the first material part are difficult to distinguish visually; therefore, the overall aesthetic feeling of the frame is improved. Moreover, when the manufacturing material of the first material part comprises the fiber composite material, the fiber composite material has the characteristics of light weight and high strength, so that not only can the strength of the middle frame be improved, but also the weight of the middle frame can be reduced.

Description

Technical Field

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

[0002] As an electronic device, the frame of a mobile phone is the main structural component. It can provide support and safety protection for components such as batteries and circuit boards in the mobile phone, so that components such as batteries and circuit boards can be protected from external damage, thereby improving the phone's ability to resist falling. Therefore, improving the strength of the middle frame can significantly improve the performance of the entire device.

[0003] However, in the current technology, it is difficult for the middle frame to achieve the requirements of high strength and low weight, so improving the strength of the middle frame and reducing the weight of the middle frame have become difficult problems that need to be solved urgently by those skilled in the art. Summary of the invention

[0004] The present application provides a middle frame, a manufacturing method thereof and an electronic device, so as to improve the strength of the middle frame and reduce the mass of the middle frame.

[0005] In the first aspect, an embodiment of the present application provides a middle frame, which may include a frame, the frame includes at least one first material part and at least one second material part, at least one first material part and at least one second material part are connected to form a frame, the material of the first material part includes a fiber composite material, the material of the second material part includes an insulating material and a pigment, and the color difference (i.e., △E) between the second material part and the first material part is less than a threshold. Wherein, the threshold can be set to no more than 2.3, and the threshold can be the minimum color difference that can be distinguished by the naked eye, or the maximum color difference that is difficult to distinguish by the naked eye, so that the color difference between the second material part and the first material part is small, and the color difference between the second material part and the first material part is difficult to be distinguished by the naked eye, so that the second material part and the first material part appear to be the same color to the naked eye, and it is difficult to distinguish the second material part from the first material part visually, thereby improving the overall aesthetics of the frame. In addition, when the material of the first material part includes a fiber composite material, because the fiber composite material has the characteristics of light weight and high strength, it can not only improve the strength of the middle frame, but also reduce the weight of the middle frame.

[0006] The colors of the second material portion and the first material portion can be set to be the same to further enhance the overall aesthetics of the frame.

[0007] Furthermore, because the material used to make the second material part includes insulating material and pigment, when the material used to make the first material part is conductive material, the second material part can be provided to avoid forming a Faraday cage, thereby avoiding shielding signals and increasing the signal receiving and sending effect, thereby obtaining a middle frame with anti-shielding function, beautiful appearance, light weight and high strength.

[0008] Exemplarily, the middle frame may further include a middle plate, which is located inside the frame and connected to the inner surface of the frame; the material of the middle plate includes a fiber composite material. The materials of the middle plate and the first material portion may be the same or different, and may be set according to actual needs. By using the fiber composite material to make the middle plate, the mass of the middle frame may be further reduced, and the strength of the middle frame may be further improved.

[0009] The middle plate and the frame may be integrally formed, that is, the middle plate and the frame may be manufactured simultaneously in the same manufacturing process, which may increase the connection strength between the middle plate and the frame and improve the stability and reliability of the middle frame.

[0010] Furthermore, for the fiber composite material, the fibers in the fiber composite material may include at least one of the fibers with high strength and high modulus such as carbon fiber, glass fiber, Kevlar fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and SiC fiber, so as to increase the strength of the fiber composite material, thereby improving the strength of the middle frame. It should be understood that the fibers in the fiber composite material may be conductive fibers such as carbon fiber, or non-conductive fibers such as glass fiber, etc., which may be selected according to actual needs and are not limited here.

[0011] The fiber composite material may include: multiple layers of fiber cloth stacked, and the angles of two adjacent layers of fiber cloth are different, so that the strength of the structure made of the fiber composite material (such as the first material part, or the first material part and the middle plate) in multiple directions can be improved, thereby improving the strength of the middle frame in multiple directions, thereby improving the anti-fall ability of the middle frame in multiple directions. It should be understood that the angle of the fiber cloth can be: the angle between the fiber extension direction of the fiber cloth and the width direction of the frame. When a display screen is provided on one side of the middle plate and a back cover is provided on the other side, the arrangement direction of the display screen and the back cover can be regarded as the thickness direction of the frame, then the width direction of the frame can be: a direction perpendicular to the thickness direction of the frame and perpendicular to the length direction of the frame, and the plane formed by the width direction and the length direction of the frame is perpendicular to the thickness direction. In the embodiment of the present application, the angle of the fiber cloth can be any angle such as 0°, 30°, 45°, 60°, 80°, 90°, 120°, 160°, 180°, -30°, -45°, -60°, etc., which is not limited here.

[0012] Furthermore, in the multi-layer fiber cloth, the angle of at least one layer of fiber cloth is 0°, that is, the fiber extension direction of at least one layer of fiber cloth is parallel to the width direction of the frame, so that the width direction of the frame has a higher strength, thereby improving the drop resistance of the middle frame in the width direction. It should be understood that the width direction of the frame is the width direction of the middle frame.

[0013] In addition, the fiber composite material includes: a fiber prepreg cloth compounded with a matrix resin, which can facilitate the molding and production of the fiber composite material, thereby facilitating the production of a middle frame. Among them, the matrix resin includes: at least one of other resins such as epoxy resin, phenolic resin, bismaleimide resin, polyamide resin, polyetheretherketone resin and polyphenylene sulfide resin. The matrix resin can be selected according to the actual application scenario to meet the needs of different application scenarios, and it can also make the selection of the matrix resin have better universality.

[0014] For the insulating material in the second material part: the insulating material may include an insulating plastic material and an insulating fiber material, wherein the insulating plastic material may include at least one of polycarbonate, nylon, polyethylene terephthalate, and polyetherimide, and the insulating fiber material may include at least one of glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber, and SiC fiber. When the insulating fiber material is selected to make the second material part, the second material part and the first material part can have relatively close strength and modulus, which is beneficial to improve the overall strength of the middle frame. In addition, the insulating fiber material can also be a fiber prepreg cloth compounded with a matrix resin to improve the molding ability of the insulating fiber material, wherein the selection of the matrix resin can refer to any of the resins listed above, which will not be described in detail here. When the insulating plastic material is selected to make the second material part, since the price of the insulating plastic material is generally lower than that of the insulating fiber material, the production cost of the middle frame can be reduced, and since the insulating plastic material has high plasticity, the molding effect of the middle frame can also be improved.

[0015] Exemplarily, each of the first material portion and the second material portion may be provided with one, or both may be provided with multiple, each second material portion separates each first material portion, and the spacing between any two adjacent second material portions may be the same or different. Among them, the specific setting method of the second material portion can be designed according to factors such as the strength requirements of the middle frame and the anti-shielding effect. For example, when the strength requirements of the middle frame are high, the number of second material portions can be reduced, and the spacing between two adjacent second material portions can be set larger; for example, when the anti-shielding effect requirements are high, the number of second material portions can be increased, and the density of the second material portions set at the position corresponding to the antenna in the middle frame can be set larger, and the density of the second material portions at other positions can be set smaller. In addition, the length of the second material portion along the circumferential direction of the frame can be set to 1mm to 20mm, which can be set according to actual needs and is not limited here.

[0016] In a second aspect, an embodiment of the present application further provides an electronic device, which may include: a display screen, a back cover, and a middle frame as described in the first aspect and any one of the embodiments of the first aspect; the display screen is arranged on one side of the middle frame, and the back cover is arranged on the other side of the middle frame. When the middle frame has high strength and low weight, the strength of the electronic device can be improved, the weight of the electronic device can be reduced, and because the middle frame has the characteristic of overall beauty, the overall beauty of the electronic device is also improved.

[0017] It should be understood that since the principle of solving the problem of the electronic device is similar to the principle of solving the problem of the aforementioned middle frame, the implementation and technical effects of the electronic device can refer to the implementation and technical effects of the aforementioned middle frame, and the repeated parts will not be repeated.

[0018] In the third aspect, the embodiment of the present application also provides a method for making a middle frame, which is used to make the middle frame as described in the first aspect and any one of the embodiments of the first aspect, and the method may include: laying a fiber composite material at the location of the first material part and the middle plate in the mold, and laying a mixed material including an insulating material and a pigment at the location of the second material part in the mold; demolding the mold after heat treatment to obtain a preform; cutting the preform to obtain the middle frame. In this way, the middle plate and the frame can be made at the same time to achieve an integrated molding setting of the middle plate and the frame; and by adding pigment to the material of the second material part, the color difference between the second material part and the first material part can be reduced, so that the second material part looks the same color as the first material part to the naked eye, and it is difficult to distinguish the second material part from the first material part visually, thereby improving the overall beauty of the frame. In addition, when the material of the first material part and the middle plate includes a fiber composite material, because the fiber composite material has the characteristics of light weight and high strength, it can not only improve the strength of the middle frame, but also reduce the weight of the middle frame.

[0019] The fiber composite materials used for the middle plate and the first material portion may be the same or different, and may be specifically set according to actual needs.

[0020] Exemplarily, laying the fiber composite material in the mold includes: when the fiber composite material includes multiple layers of fiber cloth stacked, laying each layer of fiber cloth in the mold in sequence, and the angles of two adjacent layers of fiber cloth are different, and the angle of the fiber cloth is: the angle between the fiber extension direction of the fiber cloth and the width direction of the frame. The middle frame obtained after laying in this way can have higher strength in multiple directions, thereby improving the drop resistance of the middle frame in multiple directions.

[0021] After the prefabricated product is cut, the cut structure may be polished to obtain a middle frame, so as to increase the smoothness of the surface of the middle frame, and increase the aesthetics and comfort of the middle frame.

[0022] It should be understood that since the principle of solving the problem of the middle frame produced by this manufacturing method is similar to the principle of solving the problem of the aforementioned middle frame, the implementation and technical effects of this manufacturing method can refer to the implementation and technical effects of the aforementioned middle frame, and the repeated parts will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a middle frame provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of another middle frame provided in an embodiment of the present application;

[0026] Figure 4 for Figure 3 A schematic diagram of a configuration method of each layer of fiber cloth shown in the dotted box n1;

[0027] Figure 5 A schematic diagram of the structure of another middle frame provided in an embodiment of the present application;

[0028] Figure 6 for Figure 3 A schematic diagram of another arrangement of the layers of fiber cloth shown in the middle dotted box n1;

[0029] Figure 7 A flowchart of a method for manufacturing a middle frame provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] 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.

[0031] It should be noted that the same reference numerals in the drawings of this application represent the same or similar structures, and thus their repeated description will be omitted. The words expressing positions and directions described in this application are all explained using the drawings as examples, but can be changed as needed, and all changes are included in the protection scope of this application. The drawings of this application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0032] In order to facilitate understanding of the technical solution provided by the embodiments of the present application, its application scenario is first described below.

[0033] The middle frame provided in the embodiment of the present application can be applied to a variety of electronic devices, and can provide a storage space and a mounting structure for electronic components in the electronic device, thereby providing a certain degree of protection for the electronic components, and also helping to improve the integrity of the electronic device. In actual application, the electronic device can be a mobile phone, a folding mobile phone, a tablet computer, a laptop computer, a folding computer, etc. The following will be specifically described using a mobile phone as an example.

[0034] like Figure 1 An electronic device shown in the figure, taking a mobile phone 10 as an example, the mobile phone 10 may include a circuit board assembly (not shown in the figure), a display screen 11, a back cover (not shown in the figure) and a middle frame 12. The middle frame 12 may be located between the display screen 11 and the back cover, the display screen 11 may be arranged on the front side of the middle frame 12, and the back cover may be arranged on the back side of the middle frame 12. The display screen 11 may be fixed to the front end (upper end in the figure) of the middle frame 12 by screwing, bonding, etc., and the back cover may be fixed to the rear end (lower end in the figure) of the middle frame 12 by screwing, bonding, etc. The display screen 11, the back cover and the middle frame 12 may enclose a receiving space, and electronic devices such as circuit board assemblies may be installed in the receiving space. The middle frame 12 may not only be used to fix the display screen 11 and the back cover, but also to fix the circuit board assembly and the like located in the receiving space. In addition, the exposed portion of the middle frame 12 (the outer peripheral surface in the figure) may also be used as a part of the appearance surface of the mobile phone 10, thereby helping to improve the appearance quality of the mobile phone 10 and the user's feel.

[0035] like Figure 2 As shown, the middle frame 12 may include a frame 1211 and a middle plate 1212 located in the frame 1211, and the battery, circuit board assembly, etc. may be fixed on the middle plate 1212. In addition, the display screen 11 may be fixedly connected to the frame 1211 or to the middle plate 1212; the back cover 13 may be fixedly connected to the frame 1211 or to the middle plate 1212. This application does not make specific restrictions on this. In a specific implementation, the specific shape of the frame 1211 can be made according to the appearance of the mobile phone 10. For example, in one embodiment provided in the present application, the mobile phone 10 is a flat rectangular structure as a whole, and the corners are rounded. To this end, the frame 1211 can be made into a rectangular frame structure with rounded corners, and the middle plate 1212 can be set within the outline surrounded by the frame.

[0036] In order to improve the strength of the middle frame, reduce the mass of the middle frame, and improve the overall aesthetics of the electronic device, the present application provides a middle frame, a manufacturing method thereof, and an electronic device. Specific embodiments will be described below.

[0037] Figure 3 The schematic diagram of the structure of the middle frame of an embodiment provided by the present application is exemplarily shown, see Figure 3As shown, the middle frame 12 may include: a frame 1211, and a middle plate 1212 arranged in the frame 1211, the frame 1211 includes a first material portion a1 and a second material portion a2, the first material portion a1 and the second material portion a2 are connected at intervals to form a frame, the middle plate 1212 is located in the frame and connected to the inner surface of the frame 1211, the manufacturing materials of the first material portion a1 and the middle plate 1212 include fiber composite materials, the manufacturing materials of the second material portion a2 include: insulating materials and pigments, and the color difference (i.e., △E) between the second material portion a2 and the first material portion a1 is less than a threshold value. Among them, the threshold value can be set to be no greater than 2.3, and the threshold value can be the minimum color difference that can be distinguished by the naked eye, or the maximum color difference that is difficult to distinguish by the naked eye, so that the color difference between the second material part a2 and the first material part a1 is small, and the color difference between the second material part a2 and the first material part a1 is difficult to be distinguished by the naked eye. For example, the second material part a2 and the first material part a1 can have the same color, so that the second material part a2 and the first material part a1 appear to be the same color to the naked eye, and it is difficult to visually distinguish the second material part a2 from the first material part a1, thereby improving the overall beauty of the frame 1211. Moreover, when the manufacturing material of the first material part a1 includes a fiber composite material, because the fiber composite material has the characteristics of light weight and high strength, it can not only improve the strength of the middle frame 12, but also reduce the weight of the middle frame 12. It should be understood that in order to be able to illustrate the second material part a2 and the first material part a1, so Figure 3 In the figure, different filling patterns are used to represent the second material portion a2 and the first material portion a1, so as to distinguish the second material portion a2 from the first material portion a1. However, in actual situations, since the color difference between the second material portion a2 and the first material portion a1 is small or even the same, it is difficult to distinguish the second material portion a2 from the first material portion a1 with naked eyes. Figure 3 The figure only shows the arrangement positions of the second material portion a2 and the first material portion a1 for example, and does not indicate the colors of the second material portion a2 and the first material portion a1 in actual situations.

[0038] Of course, the material of the first material portion a1 may include a fiber composite material, while the material of the middle plate 1212 may not include a fiber composite material, and the material of the middle plate 1212 may be selected according to actual conditions and is not limited here.

[0039] Exemplarily, the fibers in the fiber composite material may include at least one of the fibers with high strength and high modulus such as carbon fiber, glass fiber, Kevlar fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and SiC fiber, so that the strength of the fiber composite material can be increased, thereby improving the strength of the middle frame 12. It should be understood that the fibers in the fiber composite material can be selected from conductive fibers such as carbon fibers, and non-conductive fibers such as glass fibers, etc., which can be selected according to actual needs and are not limited here.

[0040] The fiber composite material may include: multiple layers of fiber cloth stacked together, with the angles of two adjacent layers of fiber cloth being different, so that the strength of the structure made of the fiber composite material (such as the first material portion a1, or the first material portion a1 and the middle plate 1212) in multiple directions can be improved, thereby improving the strength of the middle frame 12 in multiple directions, thereby improving the drop resistance of the middle frame 12 in multiple directions. It should be understood that the angle of the fiber cloth may be: the angle between the fiber extension direction of the fiber cloth and the width direction of the frame 1211 (i.e., the x1 direction).

[0041] Furthermore, if Figure 4 As shown in the figure, the fiber composite material is three layers of fiber cloth, the angle of the first layer of fiber cloth (as shown in (a)) is 0°, that is, the extension direction of the fibers in the first layer of fiber cloth is parallel to the width direction of the middle frame (i.e., the x1 direction), the angle of the second layer of fiber cloth (as shown in (b)) is 90°, that is, the extension direction of the fibers in the second layer of fiber cloth is perpendicular to the x1 direction, the angle of the third layer of fiber cloth (as shown in (c)) is 0°, that is, the extension direction of the fibers in the third layer of fiber cloth is parallel to the x1 direction, the first layer of fiber cloth, the second layer of fiber cloth and the third layer of fiber cloth are stacked in sequence, so that the extension directions of the three layers of fibers are perpendicular, as shown in (d), so that the strength in the width direction and the length direction (i.e., the x2 direction) of the middle frame can be improved.

[0042] In addition, the fiber composite material includes: a fiber prepreg cloth compounded with a matrix resin, which can facilitate the molding and manufacturing of the fiber composite material, thereby facilitating the manufacturing of the middle frame 12. The matrix resin includes: at least one of other resins such as epoxy resin, phenolic resin, bismaleimide resin, polyamide resin, polyetheretherketone resin and polyphenylene sulfide resin. The matrix resin can be selected according to the actual application scenario to meet the needs of different application scenarios, and the matrix resin can also be selected with better universality.

[0043] For the insulating material in the second material part a2: the insulating material may include an insulating plastic material and an insulating fiber material, wherein the insulating plastic material may include at least one of polycarbonate, nylon, polyethylene terephthalate, and polyetherimide, and the insulating fiber material may include at least one of glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber, and SiC fiber. When the insulating fiber material is selected to make the second material part a2, the second material part a2 and the first material part a1 can have relatively close strength and modulus, which is conducive to improving the overall strength of the middle frame 12. In addition, the insulating fiber material can also be a fiber prepreg cloth compounded with a matrix resin to improve the molding ability of the insulating fiber material, wherein the selection of the matrix resin can refer to any of the resins listed above, which will not be described in detail here. When the insulating plastic material is selected to make the second material part a2, since the price of the insulating plastic material is generally lower than that of the insulating fiber material, the production cost of the middle frame 12 can be reduced, and since the insulating plastic material has a high plasticity, the molding effect of the middle frame 12 can also be improved.

[0044] For example, Figure 3 As shown in , when the frame 1211 is a quadrilateral, two second material portions a2 are provided in two of the sides, and one second material portion a2 is provided in the other two sides, so a total of 6 second material portions a2 are provided, which can not only make the middle frame 12 have a better anti-shielding effect, but also avoid the reduction of the strength of the middle frame 12, thereby improving the performance of the middle frame 12. Of course, the shape of the frame 1211 is not limited to a quadrilateral, and each side does not necessarily have to be provided with a second material portion a2, as long as the frame 1211 is provided with a second material portion a2. In addition, the length d1 of the second material portion a2 along the circumferential direction of the frame can be set to 1mm to 20mm, for example, the length d1 of the second material portion a2 is 2mm, 5mm, 8mm, 15mm or 20mm, etc., which can be set according to actual needs and is not limited here.

[0045] Figure 5 The schematic diagram of the structure of the middle frame of an embodiment provided by the present application is exemplarily shown, see Figure 5 As shown, the middle frame structure of this embodiment is similar to that of the first embodiment described above. Figure 3 The middle frame structure shown in the figure is basically similar, except that: Figure 3 The number of second material parts a2 shown in the figure is different. For example, when the frame is a quadrilateral, two second material parts a2 are arranged in each side, so a total of 8 second material parts a2 are arranged, which can improve the anti-shielding effect of the middle frame. It should be understood that in order to illustrate the second material part a2 and the first material part a1, Figure 5In the figure, different filling patterns are used to represent the second material portion a2 and the first material portion a1, so as to distinguish the second material portion a2 from the first material portion a1. However, in actual situations, since the color difference between the second material portion a2 and the first material portion a1 is small or even the same, it is difficult to distinguish the second material portion a2 from the first material portion a1 with naked eyes. Figure 5 The arrangement positions of the second material portion a2 and the first material portion a1 are merely shown in the figure, and do not represent the colors of the second material portion a2 and the first material portion a1 in actual situations. Figure 3 The similarities of the middle frame structure shown can be found in the relevant description of the first embodiment above, and the repeated parts will not be repeated here.

[0046] Figure 6 The schematic diagram of the structure of the middle frame of an embodiment provided by the present application is exemplarily shown, see Figure 6 As shown, the middle frame structure of this embodiment is similar to that of the first embodiment described above. Figure 3 The middle frame structure shown in the figure is basically similar, except that: Figure 4 The fiber composite material shown has different angles for each fiber cloth. For example, the fiber composite material is five layers of fiber cloth, the angle of the first layer of fiber cloth is 0°, as shown in Figure (a), that is, the extension direction of the fibers in the first layer of fiber cloth is parallel to the x1 direction, the angle of the second layer of fiber cloth is 45°, as shown in Figure (b), that is, the extension direction of the fibers in the second layer of fiber cloth is at an angle of 45° to the x1 direction, the angle of the third layer of fiber cloth is 90°, as shown in Figure (c), that is, the extension direction of the fibers in the third layer of fiber cloth is perpendicular to the x1 direction, and the angle of the fourth layer of fiber cloth is -45 °, as shown in Figure (d), that is, the extension direction of the fibers in the fourth layer of fiber cloth is at an angle of -45° to the x1 direction, and the angle of the fifth layer of fiber cloth is 0°, as shown in Figure (e), that is, the extension direction of the fibers in the fifth layer of fiber cloth is parallel to the x1 direction, and the first layer of fiber cloth, the second layer of fiber cloth, the third layer of fiber cloth, the fourth layer of fiber cloth and the fifth layer of fiber cloth are stacked in sequence, so that the five layers of fibers are staggered, as shown in Figure (f), which can improve the strength of the middle frame in the width direction, length direction, and diagonal direction. It should be understood that the middle frame structure of this embodiment is different from that of the first embodiment described above. Figure 3 The similarities of the middle frame structure shown can be found in the relevant description of the first embodiment above, and the repeated parts will not be repeated here.

[0047] Figure 7 A flowchart of a method for manufacturing a middle frame in an embodiment of the present application is exemplarily shown, see Figure 7 As shown, the production method includes:

[0048] S1, laying the fiber prepreg compounded with matrix resin at the location of the first material part and the middle plate in the mold, and laying the mixed material including insulating material and pigment at the location of the second material part in the mold;

[0049] The fiber prepregs compounded with matrix resin laid at the location of the first material portion and at the location of the middle plate may be different or the same.

[0050] S2, demoulding the mold after heat treatment to obtain a preform;

[0051] S3, cutting and grinding the prefabricated product to obtain a middle frame.

[0052] Exemplarily, the cutting process may be, but is not limited to, CNC cutting to improve cutting quality and cutting efficiency.

[0053] In this way, the middle plate and the frame can be manufactured at the same time, realizing an integrated molding arrangement of the middle plate and the frame; and by adding pigment to the material of the second material part, the color difference between the second material part and the first material part can be reduced, so that the second material part and the first material part appear to have the same color to the naked eye, and it is difficult to distinguish the second material part from the first material part visually, thereby improving the overall aesthetics of the frame. In addition, when the material of the first material part and the middle plate includes a fiber composite material, since the fiber composite material has the characteristics of light weight and high strength, it can not only improve the strength of the middle frame, but also reduce the weight of the middle frame.

[0054] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A middle frame, characterized in that: The frame includes at least one first material portion and at least one second material portion, wherein the at least one first material portion and the at least one second material portion are connected at intervals to form the frame; The first material part is made of a fiber composite material, the second material part is made of an insulating material and a pigment, and the color difference between the second material part and the first material part is less than a threshold.

2. The middle frame according to claim 1, characterized in that: The second material portion has the same color as the first material portion.

3. The middle frame according to claim 1 or 2, characterized in that: It also includes a middle plate, which is located inside the frame and connected to the inner surface of the frame; the material used to make the middle plate includes a fiber composite material.

4. The middle frame according to claim 3, characterized in that: The frame and the middle plate are integrally formed.

5. The middle frame according to any one of claims 1 to 4, characterized in that: The fibers in the fiber composite material include at least one of carbon fiber, glass fiber, Kevlar fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and SiC fiber.

6. The middle frame according to any one of claims 1 to 5, characterized in that: The fiber composite material comprises: multiple layers of stacked fiber cloth, wherein the angles of two adjacent layers of the fiber cloth are different, and the angle of the fiber cloth is: the angle between the fiber extension direction of the fiber cloth and the width direction of the frame.

7. The middle frame according to claim 6, characterized in that: Among the multiple layers of fiber cloth, the angle of at least one layer of the fiber cloth is 0°.

8. The middle frame according to any one of claims 1 to 7, characterized in that: The fiber composite material comprises: a fiber prepreg cloth compounded with a matrix resin, wherein the matrix resin comprises: at least one of epoxy resin, phenolic resin, bismaleimide resin, polyamide resin, polyetheretherketone resin and polyphenylene sulfide resin.

9. The middle frame according to any one of claims 1 to 8, characterized in that: The insulating material comprises at least one of polycarbonate, nylon, polyethylene terephthalate, polyetherimide, glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and SiC fiber.

10. The middle frame according to any one of claims 1 to 9, characterized in that: The length of the second material portion along the circumferential direction of the frame is 1 mm to 20 mm.

11. An electronic device, characterized in that: Comprising the middle frame as described in any one of claims 1-10.

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