Method for manufacturing frame body, metal frame and electronic device

Abstract

The application discloses a preparation method of a frame body, a metal frame and electronic equipment, and relates to the field of electronic products. A preparation method of a frame body comprises the following steps: obtaining a metal frame, wherein the metal frame comprises a frame body and a connecting structure, the frame body comprises a main body part and an edge part arranged at the outer periphery of the main body part, the edge part is provided with a through hole, one end of the connecting structure is arranged on the main body part, the other end of the connecting structure is arranged on the hole wall of the through hole, at least part of the connecting structure between the two ends protrudes from a first plane of the frame body, and the normal direction of the first plane is parallel to the thickness direction of the frame body; injection molding is performed on the metal frame and plastic to form a rough blank of the frame body; and at least part of the connecting structure between the two ends of the rough blank is removed to form the frame body. The application can at least solve the problem that the metal cross beam is prone to deformation.

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 has an opening. Due to the presence of 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 caused 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 of easy deformation of metal beams.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The present invention provides a method for preparing a frame, the method comprising:

[0007] Obtain a metal frame, the metal frame comprising a frame body and a connecting structure, the frame body comprising a main portion and an edge portion disposed on the periphery of the main portion, the edge portion defining a through hole, one end of the connecting structure disposed on the main portion, the other end of the connecting structure disposed on a wall of the through hole, 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;

[0008] Injection molding the metal frame and plastic to form a rough blank of the frame;

[0009] At least a portion between two ends of the connecting structure of the rough blank is removed to form the frame.

[0010] The embodiment of the present application further provides a metal frame, comprising: a frame body and a connecting material structure;

[0011] 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 provided on the main body, and the other end of the connecting structure is provided on the hole wall of the through hole, and at least a portion between the two ends of the connecting structure protrudes from 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.

[0012] An embodiment of the present application further provides an electronic device, comprising the above-mentioned frame.

[0013] In an 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. In this way, during the injection molding of the metal frame and the plastic, the part 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 part of the connecting structure located at the hole wall. After the injection molding is completed, at least a portion between the two ends of the connecting structure is removed, so that the portion of the connecting structure remains at the hole wall and is used as a metal part. Moreover, at least a portion between the two ends of the connecting structure protrudes from the first plane of the frame body, so that at least a portion between the two ends of the connecting structure can be conveniently and thoroughly removed after the injection molding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A partial schematic diagram of a frame disclosed in an embodiment of the present application;

[0015] Figure 2 This is a schematic diagram of the first type of connecting material structure and main body disclosed in the embodiment of this application;

[0016] Figure 3 This is a partial schematic diagram of an electronic device before the first type of connecting material structure disclosed in an embodiment of the present application is removed;

[0017] Figure 4 This is a partial schematic diagram of an electronic device after the first type of connecting material structure disclosed in an embodiment of the present application is removed;

[0018] Figure 5 This is a schematic diagram of the second type of connecting material structure and main body disclosed in the embodiment of this application;

[0019] Figure 6 This is a partial schematic diagram of an electronic device before the second type of connecting material structure disclosed in an embodiment of the present application is removed;

[0020] 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.

[0021] Description of reference numerals:

[0022] 01-frame;

[0023] 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;

[0024] 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;

[0025] 02-Display screen;

[0026] 03-Battery cover. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0029] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0030] refer to Figures 1 to 7 The present application discloses a method for preparing a frame 01 for preparing an electronic device. The disclosed method includes:

[0031] Obtain a metal frame, which can include a frame body 10 and a connecting structure 20. The frame body 10 is the foundational component, providing support and a mounting base for the connecting structure 20 and other electrical components of the electronic device. The connecting structure 20 is a structure present during the preparation of the frame 01, supporting and reinforcing the other components. The connecting structure 20 can be removed later.

[0032] The frame body 10 may include a main body 11 and an edge portion 12, wherein the edge portion 12 is provided on the periphery of the main body 11. Optionally, the main body 11 may be used to mount components such as a circuit board and a camera of an electronic device, and the edge portion 12 may be used to mount components such as a receiver and a memory card.

[0033] In some embodiments, edge portion 12 is provided with a through hole 121 to provide mounting space for components. Optionally, through hole 121 may be a functional hole, including at least one of a card tray hole, a USB port, a power port, a headphone jack, and a sound port. Thus, components such as a card tray, a USB connector, a power connector, a headphone jack, a speaker, and a receiver may be mounted in through hole 121 to achieve their corresponding functions.

[0034] After obtaining the metal frame, the metal frame and plastic can be injection molded to form a rough blank of the frame body 01;

[0035] 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).

[0036] To improve appearance and user experience, a double-quadruple-curve design is employed, namely, a quadruple-curved display screen 02 and a quadruple-curved battery cover 03. However, while this design improves appearance and user experience, it also increases manufacturing difficulty for electronic devices, particularly due to the need for multiple through-holes 121 in the edge 12 of the frame 01. This double-quadruple-curve design reduces the thickness of the frame 01 in the areas where the through-holes 121 are located, resulting in a thinner metal beam at the locations of the through-holes 121. This can easily cause the metal beam to deform or even break during the injection molding process, leading to quality issues with the frame 01.

[0037] 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 a 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).

[0038] In the metal frame 01 of the embodiment of the present application, one end of the connecting structure 20 is provided at the main body 11, and the other end of the connecting structure 20 is provided 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 provided at the hole wall 122. After injection molding, it is necessary to remove at least a portion between the two ends of the connecting structure 20, so that the other end of the connecting structure 20 remains in 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.

[0039] Furthermore, at least a portion between the two ends of the connecting structure 20 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. This facilitates the subsequent removal of the portion protruding from the first plane of the frame 01, thus facilitating the complete removal of part of the connecting structure 20. Furthermore, compared to a straight-line connecting structure 20, the connecting structure 20 in the embodiment of the present application can avoid interference between components, thereby increasing the flexibility of component placement.

[0040] In an 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 for 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 between the two ends of the connecting structure 20 is removed, so that a portion of the connecting structure 20 remains at the hole wall 122 for use as a metal part; and at least a portion between the two ends of the connecting structure 20 protrudes from the first plane of the frame body 10, so that at least a portion between the two ends of the connecting structure 20 can be conveniently and thoroughly removed after the injection molding is completed.

[0041] refer to Figure 2 and Figure 5 In some embodiments, a curved structure M may be provided between the two ends of the connecting structure 20. The curved 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 curved structure M, it is convenient to remove part of the connecting structure 20, and the removal can be more thorough, avoiding residue that may affect the internal structural design of the frame 01.

[0042] It should be noted that in some cases, the portion of the connecting structure 20 remaining at the edge portion 12 can function as an antenna. Accordingly, the frame 01 may include an antenna clearance zone. This clearance zone is a cylindrical space with a certain radius, centered on the display screen 02COP. Metal components are undesirable within this clearance zone, as they can interfere with antenna performance. Therefore, in the embodiment of the present application, a curved arch structure M can be provided between the two ends of the connecting structure 20. This allows for easy and complete removal of the curved arch structure M after injection molding, preventing any metal residue from remaining within the clearance zone and ensuring antenna performance.

[0043] refer to Figures 2 to 4In some embodiments, the connecting structure 20 may include a first connecting segment 21, a second connecting segment 22, and a third connecting segment 23, which are sequentially arranged. The second connecting segment 22 is an arch structure M, which 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.

[0044] 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. In this way, an "n"-shaped or "π"-shaped second connecting section 22 can be formed to facilitate removal later.

[0045] 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 11 and the second end M2. Based on this arrangement, the connecting structure 20 can be connected between the main body 11 and the hole wall 122 of the through hole 121, thereby providing support and reinforcement for the hole wall 122, thereby alleviating deformation of the hole wall 122 during subsequent injection molding.

[0046] In some embodiments, the first connecting segment 21, the second connecting segment 22 and the third connecting segment 23 may be an integral structure. Of course, they may also be connected in sequence. As long as the strength of the connecting structure 20 can be guaranteed, the specific form is not limited.

[0047] For example, the connecting material structure 20 may be in the shape of a Chinese character "几". Of course, it may also be in other shapes, which are not specifically limited here.

[0048] Optionally, the width of the connecting structure 20 may be less than 2 mm to facilitate disconnection and removal of the arch structure M. For example, the connecting structure 20 may be a uniform width structure, with an overall width less than 2 mm, to facilitate removal of the arch structure M. Of course, the connecting structure 20 may also be a non-uniform width structure, in which the width of the arch structure M may be less than 2 mm, to facilitate removal of the arch structure M.

[0049] refer to Figure 3 、 Figure 4 、 Figure 6 and Figure 7 In some embodiments, the hole wall 122 may include a first hole wall side 122a and a second hole wall side 122b that are disposed opposite each other along the thickness direction of the frame body 10. The through hole 121 may be an elongated hole, the long sides of which may extend along the width direction of the electronic device, and the short sides of which may 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 may be the first hole wall side 122a and the second hole wall side 122b, respectively.

[0050] The arch structure M may further include a third end portion M3, such as Figure 5 As shown, the third end portion M3 is spaced apart from the first end portion M1 along the thickness direction of the frame body 10. In some embodiments, the first end portion M1 may extend along one side of the thickness direction of the frame body 10, and the third end portion M3 may extend along the other side of the thickness direction of the frame body 10, that is, disposed opposite to the first end portion M1.

[0051] The connecting structure 20 may further include a fourth connecting section 24, such as Figure 5 As shown, the fourth connecting segment 24 is connected between the second hole wall side 122b and the third end portion M3. In this way, the fourth connecting segment 24 can support and strengthen the second hole wall side 122b to prevent deformation during the injection molding process. It should be noted that after removing at least part of the connecting structure 20, a portion of the fourth connecting segment 24 can remain on the second hole wall side 122b. Thus, the remaining portion of the fourth connecting segment 24 can be prevented from deformation during the injection molding process.

[0052] 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.

[0053] In addition, the first connecting segment 21 is connected between the first hole wall side 122a and the first end portion M1. In this way, the first connecting segment 21 can support and strengthen the first hole wall side 122a to prevent deformation during the injection molding process. It should be noted that after removing at least a portion of the connecting structure 20, a portion of the first connecting segment 21 can remain on the first hole wall side 122a. Therefore, the remaining portion of the first connecting segment 21 can be prevented from deformation during the injection molding process.

[0054] Based on the above arrangement, under the support and reinforcement of the connecting 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.

[0055] 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.

[0056] refer to Figure 3 and Figure 4In 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, with the opening of the arch structure M facing the inside of the through-hole 121. This configuration prevents the arch structure M from blocking the through-hole 121, ensuring that other components can be inserted into the through-hole 121. For example, a USB connector, charging connector, headphone connector, card holder, etc. can be inserted into the through-hole 121.

[0057] 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 on the main body 11.

[0058] refer to Figure 6 and Figure 7 When the arch structure M is located within 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, with the opening of the arch structure M facing the hole wall 122. Based on this arrangement, the through hole 121 can be blocked by the arch structure M, which can provide a certain sealing effect to a certain extent, thereby improving the waterproof performance.

[0059] For example, 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.

[0060] 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, as well as the connection between the second connecting segment 22 and the fourth connecting segment 24 will be exposed in the through hole 121 respectively. 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 electronic equipment.

[0061] Optionally, the through hole 121 can be a card holder hole, that is, a through hole 121 for mounting a card holder. After the card holder is mounted to the through hole 121, since the card holder is not grounded, when external static electricity enters, secondary discharge will occur, causing problems such as death of the electronic device and burning of the card.

[0062] In addition, although the first connecting section 21 and the fourth connecting section 24 are exposed here, the inside of each of the first connecting section 21 and the fourth connecting section 24 is sealed, so as not to affect the waterproof performance of this place.

[0063] Reference Figures 2 to 7 In some embodiments, the first connecting section 21 can be provided with a boss 211 at an end thereof away from the second connecting section 22, the boss 211 protruding from a wall surface of the first connecting section 21 in a thickness direction of the frame body 10; correspondingly, the edge portion 12 can be provided with a recess at a region thereof located at the first hole wall side 122a, and the boss 211 can be embedded in the recess, 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.

[0064] In other embodiments, the fourth connecting section 24 can also be provided with a boss 211 at an end thereof away from the second connecting section 22, the boss 211 protruding from a wall surface of the fourth connecting section 24 in a thickness direction of the frame body 10; correspondingly, the edge portion 12 can be provided with a recess at a region thereof located at the second hole wall side 122b, and the boss 211 can be embedded in the recess, 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 section 24 and the edge portion 12.

[0065] In some embodiments, the connecting structure 20 and the frame body 10 can be an integral structure, which can be beneficial to improve the strength of the joint between the connecting structure 20 and the frame body 10 and improve the manufacturing efficiency. For example, the entire metal frame can be integrally injection molded or integrally forged, or machined on a material plate.

[0066] Of course, the connecting structure 20 and the frame body 10 can also be connected to each other, such as welding, bonding, clamping, screwing, etc., which can be selected according to the actual working conditions.

[0067] Optionally, the connecting structure 20 and the frame body 10 can both be metal materials.

[0068] The metal frame 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 part 11 and an edge part 12 provided with the outer periphery of the main body part 11, and the edge part 12 is provided with a through hole 121. One end of the connecting material structure 20 is arranged on the main body part 11, the other end of the connecting material structure 20 is arranged on the hole wall 122 of the through hole 121, and at least part of the connecting material structure 20 between the two ends 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.

[0069] Based on the above setting, the connecting material structure 20 can achieve the supporting and strengthening effect on the hole wall 122 to prevent the hole wall 122 and the metal parts (i.e., the first connecting segment 21, the fourth connecting segment 24, etc. remaining at the hole wall 122.) inside from being deformed due to the injection extrusion force in the subsequent injection molding process.

[0070] The application also discloses an electronic device, and the disclosed electronic device includes the frame body 01 prepared by the preparation method of the frame body 01. The electronic device can be a mobile phone, a tablet computer, an e-book, a smart wearable device, etc.

[0071] In summary, the application is based on the conditions that the overall thickness of the electronic device is small, the double four-curved shape, the one-piece injection molding frame body 01, and the high IP waterproof level. A set of connecting material design is formulated for the metal parts at the hole wall 122 of the through hole 121 in the frame body 01. Under the above conditions, the hole wall 122 and the metal parts are not easy to deform, the manufacturability of the frame body 01 and the metal parts is ensured, and the local part of the connecting material structure 20 can be completely removed after the injection molding is completed.

[0072] The embodiments of the application are described above in combination with the drawings, but the application is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative rather than limiting. Those skilled in the art can make many forms under the inspiration of the application without departing from the scope of the application and the protection scope of the claims.

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 the 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 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 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 arch structure (M), the arch structure (M) having a first end (M1) and a second end (M2), the first end (M1) and the second end (M2) being spaced apart 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) arranged opposite to each other along the thickness direction; The arch structure (M) further includes a third end portion (M3), and the third end portion (M3) and the first end portion (M1) are spaced apart along the thickness direction; The connecting structure (20) further includes 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 segment (21), the second connecting segment (22) and the third connecting segment (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) includes the first connecting segment (21), the second connecting segment (22), the third connecting segment (23) and the fourth connecting segment (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 includes 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: Frame body (10) and 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) being provided with a through hole (121), one end of the connecting structure (20) being provided on the main body (11), the other end of the connecting structure (20) being provided 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).

10. An electronic device, characterized in that: The invention 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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