Frame body preparation method, metal frame and electronic equipment

Abstract

The invention discloses a preparation method of a frame body, a metal frame and electronic equipment, and relates to the field of electronic products. The preparation method of the frame body comprises the steps that a metal frame is obtained, the metal frame comprises a frame body and a material connecting structure, the frame body comprises a main body part and an edge part arranged on the periphery of the main body part, a through hole is formed in the edge part, one end of the material connecting structure is arranged on the main body part, and the other end of the material connecting structure is arranged in the through hole; the other end of the material connecting structure is arranged on the hole wall of the through hole, at least part between the two ends of the material connecting structure protrudes out of the first plane of the frame body, and the normal direction of the first plane is parallel to the thickness direction of the frame body; performing injection molding on the metal frame and plastic to form a rough blank of the frame body; and at least part between the two ends of the material connecting structure of the rough blank is removed, so that the frame body is formed. The problem that a metal beam is prone to deformation can be solved at least.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic products, and specifically relates to a method for preparing a frame, a metal frame and an electronic device. Background Art

[0002] Dual quad-curved mobile phones have been very popular among users in recent years. They have quad-curved screens and quad-curved battery covers, which make them more comfortable and stable for users to hold compared to other curved-screen mobile phones.

[0003] However, the edge of the mobile phone frame is provided with an opening, and due to the presence of the four curved surfaces on both sides, the thickness of the frame at the opening is smaller, which limits the installation space of the metal beam at this location, resulting in a thinner metal beam. Therefore, deformation is easily generated during injection molding. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method for preparing a frame, a metal frame and an electronic device, which can at least solve the problem that the metal beam is easily deformed.

[0005] In order to solve the above technical problems, this application is implemented as follows: The present invention provides a method for preparing a frame, the method comprising: Obtain a metal frame, the metal frame comprising a frame body and a connecting structure, the frame body comprising a main body and an edge portion arranged at the periphery of the main body, the edge portion being provided with a through hole, one end of the connecting structure being arranged at the main body, the other end of the connecting structure being arranged at a hole wall of the through hole, and at least a portion between the two ends of the connecting structure protruding from a first plane of the frame body, and a normal direction of the first plane being parallel to a thickness direction of the frame body; Injection molding the metal frame and plastic to form a rough blank of the frame; At least a portion between two ends of the connecting structure of the rough blank is removed to form the frame.

[0006] The embodiment of the present application also provides a metal frame, comprising: a frame body and a connecting material structure; The frame body includes a main body and an edge portion arranged on the outer periphery of the main body, the edge portion is provided with a through hole, one end of the connecting structure is arranged on the main body, the other end of the connecting structure is arranged on the hole wall of the through hole, and at least a portion between the two ends of the connecting structure protrudes from a first plane of the frame body, and a normal direction of the first plane is parallel to a thickness direction of the frame body.

[0007] An embodiment of the present application also provides an electronic device, comprising the above-mentioned frame.

[0008] In the embodiment of the present application, a connecting structure is provided between the main body and the hole wall. The existence of the connecting structure can provide a certain support to the hole wall. Thus, during the injection molding of the metal frame and the plastic, the portion of the connecting structure located at the hole wall can be supported and strengthened, thereby effectively preventing the injection molding process from causing deformation of the portion of the connecting structure located at the hole wall. After the injection molding is completed, at least a portion of the connecting structure between the two ends is removed, so that a portion of the connecting structure remains at the hole wall for use as a metal part. Furthermore, at least a portion of the connecting structure between the two ends protrudes from the first plane of the frame body, so that at least a portion of the connecting structure between the two ends can be conveniently and thoroughly removed after the injection molding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a partial schematic diagram of the frame disclosed in the embodiment of the present application; Figure 2 A schematic diagram of the first type of connecting material structure and the main body disclosed in the embodiment of the present application; Figure 3 A partial schematic diagram of an electronic device before the first form of the connecting material structure disclosed in an embodiment of the present application is removed; Figure 4 It is a partial schematic diagram of an electronic device after the first form of the connecting material structure disclosed in the embodiment of the present application is removed; Figure 5 A schematic diagram of a second type of connecting material structure and a main body part disclosed in an embodiment of the present application; Figure 6 It is a partial schematic diagram of an electronic device before the second form of the connecting material structure disclosed in the embodiment of the present application is removed; Figure 7 This is a partial schematic diagram of an electronic device after the second form of connecting material structure disclosed in an embodiment of the present application is removed.

[0010] Description of reference numerals: 01-frame; 10-frame body; 11-main body; 12-edge portion; 121-through hole; 122-hole wall; 122a-first hole wall side; 122b-second hole wall side; 20- material connection structure; 21- first connecting section; 211- boss; 22- second connecting section; 23- third connecting section; 24- fourth connecting section; M- arch structure; M1- first end; M2- second end; M3- third end; 02-Display screen; 03-Battery cover. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0013] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0014] refer to Figures 1 to 7 The embodiment of the present application discloses a method for preparing a frame 01, which is used to prepare a frame 01 of an electronic device. The disclosed preparation method includes: A metal frame is obtained, which may include a frame body 10 and a connecting structure 20. The frame body 10 is a basic component, which can provide a bearing and installation basis for the connecting structure 20 and other electrical components of the electronic device; the connecting structure 20 is a structure existing in the preparation process of the frame body 01, which can play a role in supporting and strengthening other components, and the connecting structure 20 can be removed later.

[0015] The frame body 10 may include a main body 11 and an edge 12, wherein the edge 12 is disposed on the periphery of the main body 11. Optionally, the main body 11 may be used to install components such as circuit boards and cameras of electronic devices, and the edge 12 may be used to install components such as receivers and memory cards.

[0016] In some embodiments, the edge portion 12 is provided with a through hole 121 to provide installation space for some components through the through hole 121. Optionally, the through hole 121 may be a functional hole, which may include at least one of a card holder hole, a USB hole, a power supply hole, an earphone hole, and a sound hole. Based on this, components such as a card holder, a USB connector, a power connector, an earphone connector, a speaker, and a receiver may be installed at the through hole 121 to achieve corresponding functions.

[0017] After obtaining the metal frame, the metal frame and the plastic may be injection molded to form a rough blank of the frame body 01; At least a portion between the two ends of the connecting structure 20 of the rough blank is removed to form the frame 01. Optionally, at least a portion between the two ends of the connecting structure 20 can be removed by machining (CMC).

[0018] In order to improve the appearance performance and user feel, a double four-curve shape is adopted, that is, a four-curved display screen 02, a four-curved battery cover 03 and other shapes are adopted. However, although the four-curve shape can improve the appearance performance and user feel, it will increase the manufacturing difficulty for the manufacture of electronic devices, especially the edge 12 of the frame 01 needs to open multiple through holes 121. The double four-curve shape will cause the thickness space of the frame 01 in the area where the through holes 121 are opened to become smaller, making the metal beam set at the through hole 121 thinner, making the metal beam of the frame 01 easily deformed or even broken during the injection molding process, causing quality problems of the frame 01.

[0019] Based on the above situation, in the embodiment of the present application, before the injection molding step of the frame 01, the connecting structure 20 can support and strengthen the hole wall 122 area of ​​the through hole 121, and after the injection molding step is completed, at least part of the connecting structure 20 is removed so that part of the connecting structure 20 remains at the hole wall 122 of the through hole 121 and is used as a metal beam (i.e., a metal part).

[0020] In the metal frame 01 of the embodiment of the present application, one end of the connecting structure 20 is arranged at the main body 11, and the other end of the connecting structure 20 is arranged at the hole wall 122 of the through hole 121. Based on this, the connecting structure 20 can respectively support and strengthen the hole wall 122 in the thickness direction of the frame body 10 and in the direction perpendicular to the thickness direction, so as to prevent deformation during the injection molding process. It should be noted here that the other end of the connecting structure 20 is arranged at the hole wall 122. After injection molding, it is necessary to remove at least part of the connecting structure 20 between the two ends, and leave the other end of the connecting structure 20 at the hole wall 122. In this way, it can be ensured that the other end of the connecting structure 20 located at the hole wall 122 is not easily deformed during the injection molding process.

[0021] In addition, at least part of the connecting material structure 20 between the two ends protrudes from the first plane of the frame 01, and the normal direction of the first plane is parallel to the thickness direction of the frame 01, so that it is convenient to remove the part protruding from the first plane of the frame 01 later, providing convenience for completely removing part of the connecting material structure 20. In addition, compared with the "I"-shaped connecting material structure 20, the connecting material structure 20 in the embodiment of the present application can avoid some components to avoid interference between components, thereby improving the flexibility of component setting.

[0022] In the embodiment of the present application, a connecting structure 20 is provided between the main body 11 and the hole wall 122. The existence of the connecting structure 20 can provide a certain support to the hole wall 122. In this way, during the injection molding of the metal frame and the plastic, the part of the connecting structure 20 located at the hole wall 122 can be supported and strengthened, thereby effectively preventing the injection molding process from causing deformation of the part of the connecting structure 20 located at the hole wall 122. After the injection molding is completed, at least a portion of the connecting structure 20 between the two ends is removed, so that a portion of the connecting structure 20 remains at the hole wall 122 for use as a metal part. Moreover, at least a portion of the connecting structure 20 between the two ends protrudes from the first plane of the frame body 10, so that at least a portion of the connecting structure 20 between the two ends can be conveniently and thoroughly removed after the injection molding is completed.

[0023] refer to Figure 2 and Figure 5 In some embodiments, an arch structure M may be provided between the two ends of the connecting material structure 20, and the arch structure M arches from the first plane toward the inside of the through hole 121 or toward the outside of the through hole 121. Based on this configuration, by removing the arch structure M, it is convenient to remove part of the connecting material structure 20, and it can also be removed more thoroughly to avoid residue affecting the structural design inside the frame 01. It should be noted here that, in some cases, the portion of the connecting structure 20 remaining at the edge portion 12 can be used as an antenna. Accordingly, the frame 01 can have an antenna clearance area, which is a cylindrical space with a certain radius and a display screen 02COP as the central axis. In the antenna clearance area, metal components are not desired because they will interfere with the performance of the antenna. Therefore, in the embodiment of the present application, a curved arch structure M can be set between the two ends of the connecting structure 20, so that the curved arch structure M can be completely removed after the injection molding is completed without leaving any metal substances in the antenna clearance area, thereby ensuring the performance of the antenna.

[0024] refer to Figures 2 to 4 In some embodiments, the material connection structure 20 may include a first connecting segment 21, a second connecting segment 22, and a third connecting segment 23 arranged in sequence. The second connecting segment 22 is an arch structure M, and the arch structure M has a first end M1 and a second end M2, and the first end M1 and the second end M2 are spaced apart in a direction perpendicular to the thickness direction.

[0025] Exemplarily, both the first end M1 and the second end M2 can extend along the thickness direction of the frame body 10, and the area between the first end M1 and the second end M2 can extend in a direction perpendicular to the thickness direction, so that an "n"-shaped or "π"-shaped second connecting section 22 can be formed to facilitate removal later.

[0026] The first connecting section 21 is connected between the hole wall 122 and the first end M1, and the third connecting section 23 is connected between the main body section 11 and the second end M2. Based on this arrangement, the connecting material structure 20 can be connected between the main body section 11 and the hole wall 122 of the through hole 121, so as to support and strengthen the hole wall 122, and thus the problem of deformation of the hole wall 122 during the subsequent injection molding process can be alleviated.

[0027] In some embodiments, the first connecting section 21, the second connecting section 22 and the third connecting section 23 can be an integral structure. Of course, they can also be connected in sequence, as long as the strength of the connecting material structure 20 can be ensured, and the specific form is not limited.

[0028] Exemplarily, the connecting material structure 20 can be in a "ji" shape. Of course, it can also be in other shapes, which are not specifically limited here.

[0029] Optionally, the width of the connecting material structure 20 can be less than 2 mm to facilitate disconnection and removal of the bending arch structure M. Exemplarily, the connecting material structure 20 can be an equal-width structure, and its overall width can be less than 2 mm to facilitate the removal of the bending arch structure M; of course, the connecting material structure 20 can also be a non-equal-width structure, wherein the width of the bending arch structure M can be less than 2 mm to facilitate the removal of the bending arch structure M.

[0030] Reference Figure 3 、 Figure 4 、 Figure 6 and Figure 7 , in some embodiments, the hole wall 122 can include a first hole wall side 122a and a second hole wall side 122b that are oppositely arranged along the thickness direction of the frame body 10. Among them, the through hole 121 can be an elongated hole, the long side of the elongated hole can extend along the width direction of the electronic device, and the short side of the elongated hole can extend along the thickness direction of the electronic device (i.e., the thickness direction of the frame body 10). In this case, the two long sides of the elongated hole can be the first hole wall side 122a and the second hole wall side 122b respectively.

[0031] The bending arch structure M can further include a third end M3. As Figure 5 shown, the third end M3 and the first end M1 are spaced apart along the thickness direction of the frame body 10. In some embodiments, the first end M1 can extend along one side of the thickness direction of the frame body 10, and the third end M3 can extend along the other side of the thickness direction of the frame body 10, that is, opposite to the first end M1.

[0032] The connecting material structure 20 can further include a fourth connecting section 24. As Figure 5As shown, the fourth connecting section 24 is connected between the second hole wall side 122b and the third end M3, so that the second hole wall side 122b can be supported and strengthened by the fourth connecting section 24 to prevent deformation during the injection molding process. It should be noted here that after removing at least part of the connecting structure 20, part of the fourth connecting section 24 can remain on the second hole wall side 122b, thereby ensuring that the remaining part of the fourth connecting section 24 is not easily deformed during the injection molding process.

[0033] In some embodiments, the first connecting segment 21, the second connecting segment 22, the third connecting segment 23 and the fourth connecting segment 24 can be an integral structure. Of course, they can also be connected in sequence. As long as the strength of the connecting structure 20 can be guaranteed, the specific form is not limited.

[0034] In addition, the first connecting section 21 is connected between the first hole wall side 122a and the first end M1, so that the first hole wall side 122a can be supported and strengthened by the first connecting section 21 to prevent deformation during the injection molding process. It should be noted here that after removing at least part of the connecting structure 20, part of the first connecting section 21 can remain on the first hole wall side 122a, thereby ensuring that the remaining part of the first connecting section 21 is not easily deformed during the injection molding process.

[0035] Based on the above arrangement, under the support and reinforcement of the material connection structure 20, the first connecting section 21 at the first hole wall side 122a and the fourth connecting section 24 at the second hole wall side 122b are not easily deformed during the injection molding process.

[0036] In some embodiments, the cross-sectional area of ​​the first connecting segment 21 may be smaller than the cross-sectional area of ​​the fourth connecting segment 24, that is, the first connecting segment 21 may be regarded as a thin beam, and the fourth connecting segment 24 may be regarded as a thick beam. In the embodiment of the present application, the thin beam and the thick beam may be supported and strengthened respectively by the second connecting segment 22 to prevent deformation of the thin beam and the thick beam.

[0037] refer to Figure 3 and Figure 4 In some embodiments, when the arch structure M is located outside the through hole 121, the connecting structure 20 may include a first connecting segment 21, a second connecting segment 22, and a third connecting segment 23, and the opening of the arch structure M is disposed toward the inner side of the through hole 121. Based on this arrangement, the arch structure M can be prevented from blocking the through hole 121, and other components can be inserted into the through hole 121. For example, a USB connector, a charging connector, an earphone connector, a card holder, etc. can be inserted into the through hole 121.

[0038] Exemplarily, the connecting structure 20 can be arranged between the main body 11 and the first hole wall side 122a. Specifically, the first connecting segment 21 is located on the first hole wall side 122a, the third connecting segment 23 is located on the main body 11, and the second connecting segment 22 is located outside the first hole wall side 122a. In this case, after removing the second connecting segment 22, the first connecting segment 21 can remain on the first hole wall side 122a, and the third connecting segment 23 exists in the main body 11.

[0039] refer to Figure 6 and Figure 7 In the case where the arch structure M is located in the through hole 121, the connecting structure 20 may include a first connecting segment 21, a second connecting segment 22, a third connecting segment 23 and a fourth connecting segment 24, and the opening of the arch structure M is arranged toward the hole wall 122. Based on this arrangement, the through hole 121 can be blocked by the arch structure M, which can play a certain sealing role to a certain extent, which is conducive to improving the waterproof performance.

[0040] Exemplarily, the first connecting segment 21 is located on the first hole wall side 122a, the third connecting segment 23 is located on the main body 11, the fourth connecting segment 24 is located on the second hole wall side 122b, and the second connecting segment 22 is located in the through hole 121. In this case, after removing the second connecting segment 22, the first connecting segment 21 can remain on the first hole wall side 122a, the third connecting segment 23 can remain on the main body 11, and the fourth connecting segment 24 can remain on the second hole wall side 122b.

[0041] It should be noted here that after the second connecting segment 22 is removed, the first connecting segment 21 remains on the first hole wall side 122a, and the fourth connecting segment 24 remains on the second hole wall side 122b. Since the second connecting segment 22 is located inside the through hole 121, after the second connecting segment 22 is removed, the connection between the second connecting segment 22 and the first connecting segment 21, and the connection between the second connecting segment 22 and the fourth connecting segment 24 are respectively exposed in the through hole 121. In this way, static electricity entering from the outside can be adsorbed to prevent secondary discharge due to the presence of static electricity from affecting the normal use of the electronic equipment.

[0042] Optionally, the through hole 121 can be a card tray hole, that is, a through hole 121 for installing a card tray. After the card tray is installed in the through hole 121, since the card tray is not grounded, external static electricity enters and secondary discharge occurs, causing problems such as electronic equipment freezing and card burning. The embodiment of the present application reserves the first connecting section 21 and the fourth connecting section 24 so that the first connecting section 21 and the fourth connecting section 24 are closer to the outside than the card tray. In this way, after static electricity enters, it will first be absorbed by the first connecting section 21 and the fourth connecting section 24 to the frame 01, thereby preventing static electricity from reaching the card tray and preventing secondary discharge from occurring.

[0043] In addition, although the first connecting section 21 and the fourth connecting section 24 are exposed here, the first connecting section 21 and the fourth connecting section 24 are sealed at the inner side thereof, so that the waterproof performance of the place is not affected.

[0044] refer to Figures 2 to 7 In some embodiments, a boss 211 may be provided at the end of the first connecting section 21 that faces away from the second connecting section 22, and the boss 211 protrudes from the wall surface of the first connecting section 21 along the thickness direction of the frame body 10; accordingly, a groove may be provided in the area of ​​the edge portion 12 located on the first hole wall side 122a, and the boss 211 may be embedded in the groove, which is beneficial to increase the contact area and can also play a certain clamping role, thereby improving the reliability of the connection between the first connecting section 21 and the edge portion 12.

[0045] In other embodiments, a boss 211 may also be provided at the end of the fourth connecting segment 24 that faces away from the second connecting segment 22, and the boss 211 protrudes from the wall surface of the fourth connecting segment 24 along the thickness direction of the frame body 10; accordingly, a groove may be provided in the area of ​​the edge portion 12 located on the second hole wall side 122b, and the boss 211 may be embedded in the groove, which is beneficial to increase the contact area and can also play a certain clamping role, thereby improving the reliability of the connection between the fourth connecting segment 24 and the edge portion 12.

[0046] In some embodiments, the connecting structure 20 and the frame body 10 can be an integral structure, which can help improve the strength of the connection between the connecting structure 20 and the frame body 10, thereby improving manufacturing efficiency. For example, the entire metal frame can be integrally injection molded, integrally forged, or machined on a sheet.

[0047] Of course, the connecting structure 20 and the frame body 10 may also be connected to each other, such as by welding, bonding, clamping, screwing, etc., which may be selected according to actual working conditions.

[0048] Optionally, both the connecting structure 20 and the frame body 10 can be made of metal materials.

[0049] The present application also discloses a metal frame, which is the metal frame in the step of obtaining the metal frame in the preparation method of the frame body 01. Figures 1 to 7 The disclosed metal frame includes a frame body 10 and a connecting material structure 20. The frame body 10 includes a main body 11 and an edge portion 12 provided at the periphery of the main body 11, the edge portion 12 is provided with a through hole 121, one end of the connecting material structure 20 is provided at the main body 11, the other end of the connecting material structure 20 is provided at a hole wall 122 of the through hole 121, and at least a portion between the two ends of the connecting material structure 20 protrudes from a first plane of the frame body 10, and the normal direction of the first plane is parallel to the thickness direction of the frame body 10.

[0050] Based on the above arrangement, the connecting structure 20 can be used to support and strengthen the hole wall 122 to prevent the hole wall 122 and the metal parts inside it (i.e., the first connecting section 21, the fourth connecting section 24, etc. remaining in the hole wall 122) from being deformed by the injection extrusion force during the subsequent injection molding process.

[0051] The embodiment of the present application also discloses an electronic device, which includes a frame 01, and the frame 01 is manufactured by the above-mentioned method for manufacturing the frame 01. The electronic device may be a mobile phone, a tablet computer, an e-book, a smart wearable device, etc.

[0052] In summary, the embodiment of the present application is based on the small thickness of the electronic device, the double four-curve shape, the one-piece injection molded frame 01, and the high IP waterproof level. A set of connecting material designs is formulated for the metal parts at the hole wall 122 of the through hole 121 in the frame 01. Under the above conditions, it can still be ensured that the hole wall 122 and the metal parts are not easy to deform, thereby ensuring the manufacturability of the frame 01 and the metal parts. In addition, it is also convenient to completely remove part of the connecting material structure 20 after the injection molding is completed.

[0053] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for preparing a frame, characterized in that: The preparation method comprises: A metal frame is obtained, the metal frame comprising a frame body (10) and a connecting structure (20), the frame body (10) comprising a main body (11) and an edge portion (12) arranged on the periphery of the main body (11), the edge portion (12) being provided with a through hole (121), one end of the connecting structure (20) being arranged on the main body (11), the other end of the connecting structure (20) being arranged on a hole wall (122) of the through hole (121), and at least a portion between the two ends of the connecting structure (20) protruding from a first plane of the frame body (10), and a normal direction of the first plane being parallel to a thickness direction of the frame body (10); Injection molding the metal frame and plastic to form a rough blank of the frame body (01); At least a portion between two ends of the connecting structure (20) of the rough blank is removed to form the frame (01).

2. The preparation method according to claim 1, characterized in that: An arch structure (M) is provided between the two ends of the connecting material structure (20), and the arch structure (M) arches from the first plane toward the inside of the through hole (121) or toward the outside of the through hole (121).

3. The preparation method according to claim 2, characterized in that: The connecting material structure (20) comprises a first connecting section (21), a second connecting section (22) and a third connecting section (23) which are arranged in sequence; The second connecting section (22) is the curved arch structure (M), the curved arch structure (M) having a first end (M1) and a second end (M2), the first end (M1) and the second end (M2) being arranged at intervals in a direction perpendicular to the thickness direction; The first connecting section (21) is connected between the hole wall (122) and the first end (M1); The third connecting section (23) is connected between the main body (11) and the second end portion (M2).

4. The preparation method according to claim 3, characterized in that: The hole wall (122) comprises a first hole wall side (122a) and a second hole wall side (122b) which are arranged opposite to each other along the thickness direction; The arch structure (M) further comprises a third end portion (M3), wherein the third end portion (M3) and the first end portion (M1) are spaced apart from each other along the thickness direction; The connecting structure (20) further comprises a fourth connecting section (24), wherein the first connecting section (21) is connected between the first hole wall side (122a) and the first end (M1), and the fourth connecting section (24) is connected between the second hole wall side (122b) and the third end (M3).

5. The preparation method according to claim 4, characterized in that: In a case where the arch structure (M) is located outside the through hole (121), the connecting structure (20) comprises the first connecting section (21), the second connecting section (22) and the third connecting section (23), and the opening of the arch structure (M) is arranged toward the inside of the through hole (121); When the arch structure (M) is located within the through hole (121), the connecting structure (20) comprises the first connecting section (21), the second connecting section (22), the third connecting section (23) and the fourth connecting section (24), and the opening of the arch structure (M) is arranged toward the hole wall (122).

6. The preparation method according to claim 3 or 4, characterized in that: A boss (211) is provided at one end of the first connecting section (21) facing away from the second connecting section (22), and the boss (211) protrudes from the wall surface of the first connecting section (21) along the thickness direction.

7. The preparation method according to any one of claims 1 to 5, characterized in that: The connecting material structure (20) and the frame body (10) are an integral structure.

8. The preparation method according to any one of claims 1 to 5, characterized in that: The through hole (121) is a functional hole, and the functional hole comprises at least one of a card holder hole, a USB hole, a power hole, an earphone hole, and a sound hole.

9. A metal frame, characterized in that: include: A frame body (10) and a connecting material structure (20); The frame body (10) comprises a main body (11) and an edge portion (12) arranged on the periphery of the main body (11); the edge portion (12) is provided with a through hole (121); one end of the connecting structure (20) is arranged on the main body (11); the other end of the connecting structure (20) is arranged on a hole wall (122) of the through hole (121); and at least a portion between the two ends of the connecting structure (20) protrudes from a first plane of the frame body (10); and a normal direction of the first plane is parallel to a thickness direction of the frame body (10).

10. An electronic device, characterized in that: It comprises a frame (01), wherein the frame (01) is prepared by the preparation method according to any one of claims 1 to 8.

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