Middle frame assembly and electronic equipment

Abstract

The utility model discloses a middle frame assembly and electronic equipment, and belongs to the field of electronic equipment. The middle frame assembly comprises an outer frame, a middle plate and a filling part. Due to the fact that the outer frame body and the connecting parts in the outer frame are of the integrally-formed structure, it can be guaranteed that the overall strength of the outer frame is high. In addition, the filling part is directly formed between the inner side face of the outer frame body and the edge of the middle plate through the injection molding technology, the multiple connecting parts are all distributed on the inner side face, and therefore the connecting strength between the filling part and the outer frame is improved. In this way, the stability of the middle frame assembly can be remarkably improved, and therefore the reliability of the electronic equipment is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electronic devices, and in particular to a middle frame assembly and an electronic device. BACKGROUND

[0002] The middle frame assembly, as an important component of the electronic device, not only provides structural support for the electronic device and ensures the safety of the internal components of the electronic device, but also plays a key role in the overall aesthetics of the electronic device.

[0003] Generally, the middle frame assembly is composed of a metal frame and a middle plate, and the frame and the middle plate are connected by an injection molding process. For example, this process can inject molten plastic into a middle frame mold under high pressure, and after cooling, the desired plastic connecting structure is formed.

[0004] However, during the use of the electronic device, the connection strength between the metal frame and the plastic may gradually decrease over time, thereby affecting the stability of the middle frame assembly and further reducing the reliability of the electronic device. Innovative content

[0005] The present application provides a middle frame assembly and an electronic device. The problem of reduced reliability of the electronic device in the prior art can be solved, and the technical solution is as follows:

[0006] On the one hand, a middle frame assembly is provided, comprising:

[0007] an outer frame, a middle plate, and a filling portion;

[0008] The outer frame is distributed around the outer periphery of the middle plate, and the outer frame comprises an integrally formed outer frame body and a plurality of connecting portions, the outer frame body has oppositely arranged outer and inner sides, the inner side is closer to the middle plate than the outer side, and the plurality of connecting portions are distributed on the inner side;

[0009] The filling portion is distributed between the inner side of the outer frame body and the edge portion of the middle plate;

[0010] The filling portion is connected to the inner side of the outer frame body and the edge portion of the middle plate through the plurality of connecting portions.

[0011] Optionally, the outer frame body and the plurality of connecting portions are an integrally formed frame structure by 3D printing technology.

[0012] Optionally, the connecting portion comprises a first strip-shaped groove distributed on the inner side of the outer frame body, and the extension direction of the first strip-shaped groove is parallel to the extension direction of the portion of the outer frame body in which the first strip-shaped groove is distributed.

[0013] Optionally, the connecting portion comprises a second strip-shaped groove distributed on the inner side surface of the outer frame body, and two bearing grooves oppositely arranged in the first direction, the second strip-shaped groove being located between the two bearing grooves and being in communication with the two bearing grooves.

[0014] The extension direction of the second strip-shaped groove is parallel to the extension direction of the part of the outer frame body in which the second strip-shaped groove is distributed; and the first direction is perpendicular to the middle plate.

[0015] Optionally, the connecting portion comprises a third strip-shaped groove distributed on the inner side surface of the outer frame body, and a plurality of protruding structures distributed on the groove surface of the third strip-shaped groove, the extension direction of the third strip-shaped groove being parallel to the extension direction of the part of the outer frame body in which the third strip-shaped groove is distributed.

[0016] Optionally, the connecting portion comprises a plurality of first hollow grooves arrayed distributed on the inner side surface of the outer frame body; and / or, the connecting portion comprises a fourth strip-shaped groove distributed on the inner side surface of the outer frame body, and a plurality of second hollow areas distributed on the groove surface of the fourth strip-shaped groove, the extension direction of the fourth strip-shaped groove being parallel to the extension direction of the part of the outer frame body in which the fourth strip-shaped groove is distributed.

[0017] Optionally, the middle frame assembly further comprises a welding portion, the welding portion being located between the edge portion of the outer frame and the middle plate, and the outer frame being welded with the edge portion of the middle plate through the welding portion.

[0018] Optionally, the middle plate has a through hole; the outer frame has a support table, and a clamping portion located on the support table.

[0019] After the part of the middle plate in which the through hole is arranged is located on the support table, the clamping portion passes through the through hole to clamp with the middle plate.

[0020] Optionally, the outer frame is a frame-shaped structure made of titanium alloy or stainless steel.

[0021] In another aspect, an electronic device is provided, comprising:

[0022] A middle frame assembly and components located in the middle frame assembly, the middle frame assembly being any of the above-mentioned middle frame assemblies.

[0023] The technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0024] Since the outer frame body and the plurality of connecting portions in the outer frame are integrally formed, the overall strength of the outer frame can be ensured to be high. In addition, the filling portion is directly formed between the inner side surface of the outer frame body and the edge of the middle plate through an injection molding process, and the plurality of connecting portions are distributed on the inner side surface, thereby improving the connecting strength between the filling portion and the outer frame. In this way, the stability of the middle frame assembly can be significantly improved, so that the reliability of the electronic device is high. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a top view of a middle frame assembly provided by an embodiment of the present application;

[0027] Figure 2 is Figure 1 is a sectional view of the middle frame assembly shown at A-A';

[0028] Figure 3 is Figure 1 is another sectional view of the middle frame assembly shown at A-A';

[0029] Figure 4 is Figure 1 is still another sectional view of the middle frame assembly shown at A-A';

[0030] Figure 5 is Figure 1 is still another sectional view of the middle frame assembly shown at A-A';

[0031] Figure 6 is Figure 1 is still another sectional view of the middle frame assembly shown at A-A';

[0032] Figure 7 is Figure 1 is a sectional view of the middle frame assembly in another embodiment shown at A-A';

[0033] Figure 8 is Figure 1 is another sectional view of the middle frame assembly in another embodiment shown at A-A';

[0034] Figure 9 is Figure 1 is still another sectional view of the middle frame assembly in another embodiment shown at A-A'. DETAILED DESCRIPTION

[0035] For the purpose, technical solutions and advantages of the present application to be clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0036] Please refer to Figure 1 and Figure 2 , Figure 1 is a top view of a middle frame assembly provided by an embodiment of the present application, Figure 2 is Figure 1 a cross-sectional view of the middle frame assembly at A-A' is shown. The middle frame assembly 000 can include an outer frame 100, a middle plate 200 and a filling part 300.

[0037] The outer frame 100 in the middle frame assembly 000 can surround the outer periphery of the middle plate 200, and the outer frame 100 can include an integrally formed outer frame body 101 and a plurality of connecting parts 102.

[0038] Among them, the outer frame body 101 can have oppositely arranged outer side U1 and inner side U2, and the inner side U2 is closer to the middle plate 200 relative to the outer side U1. The plurality of connecting parts 102 in the outer frame 100 are all distributed on the inner side U2.

[0039] The filling part 300 in the middle frame assembly 000 can be distributed between the inner side U2 of the outer frame body 101 and the edge portion of the middle plate 200.

[0040] Among them, the filling part 300 in the middle frame assembly 000 can be connected to the inner side U1 of the outer frame body 101 through the plurality of connecting parts 102, and connected to the edge portion of the middle plate 200.

[0041] For example, the filling part 300 can be formed by an injection molding process, using a material with excellent elasticity and durability, such as plastic or silicone.

[0042] In a possible implementation, the outer frame 100 and the edge portion of the middle plate 200 can be placed in the same mold, and then molten filling material is injected into the mold. After the filling material solidifies, the filling part 300 for connecting the outer frame 100 and the edge portion of the middle plate 200 can be obtained. Here, the filling part 300 obtained by injection molding can be tightly connected to the plurality of connecting parts 102 arranged on the inner side U1 of the outer frame body 101 in the outer frame 100, and the filling part 300 obtained by injection molding can also be tightly connected to the edge portion of the middle plate 200.

[0043] In the embodiment of the present application, since the outer frame body 101 and the plurality of connecting portions 102 in the outer frame 100 are integrally formed, the overall strength of the outer frame 100 can be ensured to be high. In addition, the filling portion 300 is directly formed between the inner side surface U2 of the outer frame body 101 and the edge of the middle plate 200 by the injection molding process, and the plurality of connecting portions 102 are distributed on the inner side surface U2, thereby improving the connecting strength between the filling portion 300 and the outer frame 100. In this way, the stability of the middle frame assembly 000 can be significantly improved, so that the reliability of the electronic device is high.

[0044] To sum up, the embodiment of the present application provides a middle frame assembly and an electronic device, which comprise an outer frame, a middle plate and a filling portion. Since the outer frame body and the plurality of connecting portions in the outer frame are integrally formed, the overall strength of the outer frame can be ensured to be high. In addition, the filling portion is directly formed between the inner side surface of the outer frame body and the edge of the middle plate by the injection molding process, and the plurality of connecting portions are distributed on the inner side surface, thereby improving the connecting strength between the filling portion and the outer frame. In this way, the stability of the middle frame assembly can be significantly improved, so that the reliability of the electronic device is high.

[0045] For example, the outer frame body 101 and the plurality of connecting portions 102 in the middle frame assembly 000 can be a frame-shaped structure integrally formed by 3D printing technology. That is, the outer frame body 101 with the plurality of connecting portions 102 can be directly printed by 3D printing technology, and the outer side surface U1 of the outer frame body 101 can be ensured to be smooth, and the plurality of connecting portions 102 can be ensured to be distributed on the inner side surface U2 of the outer frame body 101.

[0046] In this case, by 3D printing technology, not only the precise manufacturing of complex shapes can be realized to meet the needs of different application scenarios, but also the material can be accurately used to reduce waste. In addition, the integrally formed outer frame body 101 and the plurality of connecting portions 102 reduce the assembly steps, simplify the production process, improve the efficiency, and reduce the quality risk.

[0047] In the embodiment of the present application, the connecting portion 102 in the middle frame assembly 000 can have a plurality of structural forms, and for the sake of clarity, the embodiment of the present application will be described by way of example with the following five optional implementation manners:

[0048] The first optional implementation manner is shown in Figure 3 , which is Figure 3 , which is Figure 1 Another cross-sectional view of the middle frame assembly at A-A' is shown. The connecting portion 102 in the outer frame 100 can comprise a first strip-shaped groove P1 distributed on the inner side surface of the outer frame body 101, and the extension direction of the first strip-shaped groove P1 is parallel to the extension direction of the part of the outer frame body 101 on which the first strip-shaped groove P1 is distributed.

[0049] In this configuration, after the filler portion 300 is injected into the space between the inner side U2 of the outer frame body 101 and the edge of the middle plate 200 using an injection molding process, the filler material completely fills the first strip groove P1. This not only increases the contact area between the filler portion 300 and the outer frame body 101, but also enhances the friction between the filler portion 300 and the outer frame body 101 after the filler portion 300 cools and solidifies, thereby strengthening the connection stability between the filler portion 300 and the outer frame 100. Furthermore, due to the increased contact area between the filler portion 300 and the outer frame body 101, external dust and moisture can be effectively prevented from penetrating the interior of the middle frame assembly 000, thereby improving the waterproof and dustproof capabilities of electronic devices using this middle frame assembly 000.

[0050] The second optional implementation method, such as Figure 4 As shown, Figure 4 yes Figure 1 Another cross-sectional view of the middle frame assembly at A-A' is shown. The connecting portion 102 in the outer frame 100 may include: a second strip groove P2 distributed on the inner side surface U1 of the outer frame body 101, and two support grooves Q disposed opposite to each other in the first direction X. The second strip groove P2 may be located between the two support grooves Q and communicate with the two support grooves Q.

[0051] The extension direction of the second stripe P2 in the connecting portion 102 can be parallel to the extension direction of the portion of the outer frame body 101 in which the second stripe P2 is distributed. Here, the first direction X can be perpendicular to the middle plate 200.

[0052] In this configuration, after the filler portion 300 is injected into the space between the inner side U2 of the outer frame body 101 and the edge of the middle plate 200 using an injection molding process, the filler material completely fills the second strip groove P2. This not only increases the contact area between the filler portion 300 and the outer frame body 101, but also enhances the friction between the filler portion 300 and the outer frame body 101 after the filler portion 300 cools and solidifies, thereby strengthening the connection stability between the filler portion 300 and the outer frame 100. Furthermore, due to the increased contact area between the filler portion 300 and the outer frame body 101, external dust and moisture can be effectively prevented from penetrating the interior of the middle frame assembly 000, thereby improving the waterproof and dustproof capabilities of electronic devices using this middle frame assembly 000.

[0053] The third optional implementation method, such as Figure 5 As shown, Figure 5 yes Figure 1Another cross-sectional view of the middle frame assembly at A-A' is shown. The connecting portion 102 in the outer frame 100 can include a third strip-shaped groove P3 distributed on the inner side surface of the outer frame body 101, and a plurality of protruding structures M distributed on the groove surface of the third strip-shaped groove P3. The extension direction of the third strip-shaped groove P3 is parallel to the extension direction of the part of the outer frame body 101 where the third strip-shaped groove P3 is distributed. For example, the number of the plurality of protruding structures M is six.

[0054] In this case, after the filling portion 300 is injected between the inner side surface U2 of the outer frame body 101 and the edge of the middle plate 200 through the injection molding process, the filling portion 300 fills the third strip-shaped groove P3 and can completely cover the plurality of protruding structures M. This not only increases the contact area between the filling portion 300 and the outer frame body 101, but also enhances the friction between the filling portion 300 and the outer frame body 101 after the filling portion 300 cools and solidifies, thereby strengthening the connection stability of the filling portion 300 and the outer frame 100. In addition, because the contact area between the filling portion 300 and the outer frame body 101 is increased, external dust and moisture can be effectively prevented from entering the inside of the middle frame assembly 000, thereby improving the waterproof and dustproof capability of the electronic device using the middle frame assembly 000.

[0055] A fourth alternative implementation is shown in Figure 6 , Figure 6 is Figure 1 Another cross-sectional view of the middle frame assembly at A-A' is shown. The connecting portion 102 in the outer frame 100 can include a plurality of first hollow grooves K1 arrayed distributed on the inner side surface of the outer frame body 101.

[0056] In this case, after the filling portion 300 is injected between the inner side surface U2 of the outer frame body 101 and the edge of the middle plate 200 through the injection molding process, the filling portion 300 fills the plurality of first hollow grooves K1. This not only increases the contact area between the filling portion 300 and the outer frame body 101, but also enhances the friction between the filling portion 300 and the outer frame body 101 after the filling portion 300 cools and solidifies, thereby strengthening the connection stability of the filling portion 300 and the outer frame 100. In addition, because the contact area between the filling portion 300 and the outer frame body 101 is increased, external dust and moisture can be effectively prevented from entering the inside of the middle frame assembly 000, thereby improving the waterproof and dustproof capability of the electronic device using the middle frame assembly 000.

[0057] A fifth alternative implementation is shown in Figure 7 , Figure 7 is Figure 1A cross-sectional view of the middle frame assembly in another embodiment is shown. The connecting portion 102 in the outer frame 100 comprises a fourth strip-shaped groove P4 distributed on the inner side surface U2 of the outer frame body 101, and a plurality of second hollowed-out areas K2 distributed on the groove surface of the fourth strip-shaped groove P4. The extension direction of the fourth strip-shaped groove P4 is parallel to the extension direction of the portion of the outer frame body 101 where the fourth strip-shaped groove P4 is distributed.

[0058] In this case, after the filling portion 300 is injected between the inner side surface U2 of the outer frame body 101 and the edge of the middle plate 200 through the injection molding process, the filling portion 300 will fill the fourth strip-shaped groove P4 and the plurality of second hollowed-out areas K2. This not only increases the contact area between the filling portion 300 and the outer frame body 101, but also enhances the friction between the filling portion 300 and the outer frame body 101 after the filling portion 300 cools and solidifies, thereby strengthening the connection stability of the filling portion 300 and the outer frame 100. In addition, due to the increase in the contact area between the filling portion 300 and the outer frame body 101, external dust and moisture can be effectively prevented from entering the inside of the middle frame assembly 000, thereby improving the waterproof and dustproof capability of the electronic device using the middle frame assembly 000.

[0059] In the embodiments of the present application, by providing a plurality of connecting portions 102 on the outer frame 100, the amount of material used for the outer frame 100 can be reduced. Compared with the outer frame 100 without these connecting portions 102, the weight of the outer frame 100 can be reduced, thereby reducing the weight of the entire middle frame assembly 000.

[0060] It should be noted that the plurality of connecting portions 102 in the outer frame 100 can individually adopt any one of the above structural forms, or can be combined with multiple structural forms according to actual needs, which is not limited in the present application.

[0061] Optionally, in order to ensure that the relative position between the outer frame 100 and the middle plate 200 does not change during the process of obtaining the filling portion 300 by injection molding between the outer frame 100 and the middle plate 200, the outer frame 100 and the middle plate 200 can be connected first, and then the filling portion 300 is obtained by injection molding between the connected outer frame 100 and middle plate 200. Here, there are two exemplary implementation manners between the outer frame 100 and the middle plate 200.

[0062] The first exemplary implementation manner, please refer to Figure 8 , Figure 8 is Figure 1Another cross-sectional view of the middle frame assembly in another embodiment is shown at A-A'. The middle frame assembly 000 can further include a welding portion 400, which can be located between the edge portion of the outer frame 100 and the middle plate 200, and the outer frame 100 can be welded to the edge portion of the middle plate 200 through the welding portion 400.

[0063] In this case, the connection between the outer frame 100 and the middle plate 200 can be made more firm by welding, thereby enhancing the bonding force between the two. In this way, not only the overall structural integrity of the middle frame assembly 000 is further improved, but also the reliability of long-term use is improved.

[0064] In a second example implementation, please refer to Figure 9 , Figure 9 is Figure 1 Another cross-sectional view of the middle frame assembly in another embodiment is shown at A-A'. The middle plate 200 in the middle frame assembly 000 can have a through hole N, and the outer frame 100 in the middle frame assembly 000 can have a support platform 103 and a clamping portion 104 located on the support platform 103.

[0065] In this case, the clamping portion 104 in the outer frame 100 can pass through the through hole N to be clamped with the middle plate 200 after the portion of the middle plate 200 where the through hole N is located is located on the support platform 103.

[0066] In this case, the clamping portion 104 is mechanically locked with the middle plate 200 through the through hole N, significantly enhancing the connection strength between the outer frame 100 and the middle plate 200. In addition, the design of the clamping portion 104 and the through hole N ensures the accurate positioning of the middle plate 200 during installation, avoiding positional deviation, thereby ensuring the assembly precision and quality of the overall structure.

[0067] In the embodiments of the present application, the outer frame 100 in the middle frame assembly 000 can be a frame-shaped structure made of titanium alloy or stainless steel.

[0068] In this case, titanium alloy and stainless steel not only have high mechanical strength and excellent compression and tensile resistance, can withstand large external pressure and impact, and ensure the long-term stability and reliability of the middle frame assembly 000 in various environments; but also have smooth surfaces, and can achieve high-quality appearance effects through processes such as polishing and wire drawing. In addition, titanium alloy and stainless steel also have excellent wear resistance and are not easy to scratch, thereby ensuring the aesthetic appearance of the product for a long time.

[0069] Optionally, the middle plate 200 in the middle frame assembly 000 can be a plate-shaped structure made of magnesium alloy and formed by a die casting process. The outer frame 100 is manufactured by using a 3D printing technology. In this way, the outer frame 100 and the middle plate 200 do not need to be integrally formed by a computer numerical control machine (CNC), thereby simplifying the production process and reducing the processing cost. In addition, the middle plate 200 is made of magnesium alloy, and magnesium alloy is lighter in weight than titanium alloy or stainless steel, thereby also ensuring that the overall weight of the middle frame assembly 000 is small.

[0070] In summary, the embodiment of the present application provides a middle frame assembly and an electronic device, which comprises an outer frame, a middle plate and a filling part. Since the outer frame body and the plurality of connecting parts in the outer frame are integrally formed, the overall strength of the outer frame can be ensured. In addition, the filling part is directly formed between the inner side surface of the outer frame body and the edge of the middle plate by an injection molding process, and the plurality of connecting parts are distributed on the inner side surface, thereby improving the connecting strength between the filling part and the outer frame. In this way, the stability of the frame assembly can be significantly improved, thereby making the reliability of the electronic device higher.

[0071] The embodiment of the present application also provides an electronic device, which can be a smart phone, a notebook computer or an electronic book, etc. The electronic device can comprise a middle frame assembly 000 and components (not shown) located in the middle frame assembly 000, and the middle frame assembly 000 can be any of the above-mentioned middle frame assemblies 000.

[0072] In the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise explicitly limited.

[0073] The above only describes optional embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A middle frame assembly, characterized in that, The application relates to a frame structure, which comprises an outer frame (100), a middle plate (200) and a filling part (300). The outer frame (100) surrounds the outer periphery of the middle plate (200), and the outer frame (100) comprises an integrally-formed outer frame body (101) and a plurality of connecting parts (102), the outer frame body (101) has oppositely arranged outer side surfaces (U1) and inner side surfaces (U2), the inner side surfaces (U2) are closer to the middle plate (200) than the outer side surfaces (U1), and the plurality of connecting parts (102) are arranged on the inner side surfaces (U2). The filling part (300) is arranged between the inner side surfaces (U2) of the outer frame body (101) and the edge portions of the middle plate (200). The filling part (300) is connected with the inner side surfaces (U2) of the outer frame body (101) and the edge portions of the middle plate (200) through the plurality of connecting parts (102). The outer frame body (101) and the plurality of connecting parts (102) are integrally formed into a frame structure through 3D printing technology.

2. The middle frame assembly of claim 1, wherein, The connecting part (102) comprises a first strip-shaped groove (P1) arranged on the inner side surface of the outer frame body (101), and the extending direction of the first strip-shaped groove (P1) is parallel to the extending direction of the part of the outer frame body (101) where the first strip-shaped groove (P1) is arranged.

3. The middle frame assembly of claim 2, wherein, The connecting part (102) comprises a second strip-shaped groove (P2) arranged on the inner side surface (U2) of the outer frame body (101) and two oppositely arranged bearing grooves (Q) in a first direction (X), and the second strip-shaped groove (P2) is located between the two bearing grooves (Q) and communicates with the two bearing grooves (Q).

4. The middle frame assembly of claim 2, wherein, The extending direction of the second strip-shaped groove (P2) is parallel to the extending direction of the part of the outer frame body (101) where the second strip-shaped groove (P2) is arranged, and the first direction (X) is perpendicular to the middle plate (200). The connecting part (102) comprises a third strip-shaped groove (P3) arranged on the inner side surface of the outer frame body (101) and a plurality of protruding structures (M) arranged on the groove surface of the third strip-shaped groove (P3), and the extending direction of the third strip-shaped groove (P3) is parallel to the extending direction of the part of the outer frame body (101) where the third strip-shaped groove (P3) is arranged.

5. The middle frame assembly of claim 2, wherein, The connecting part (102) comprises a plurality of first hollow grooves (K1) arranged in an array on the inner side surface of the outer frame body (101), and / or the connecting part (102) comprises a fourth strip-shaped groove (P4) arranged on the inner side surface (U2) of the outer frame body (101) and a plurality of second hollow areas (K2) arranged on the groove surface of the fourth strip-shaped groove (P4), and the extending direction of the fourth strip-shaped groove (P4) is parallel to the extending direction of the part of the outer frame body (101) where the fourth strip-shaped groove (P4) is arranged.

6. The middle frame assembly of claim 2, wherein, ​ 7. The middle frame assembly of any one of claims 1-6, wherein, The middle frame assembly further comprises a welding portion (400) between the edge portions of the outer frame (100) and the middle plate (200), and the outer frame (100) is welded with the edge portions of the middle plate (200) through the welding portion.

8. The middle frame assembly of any one of claims 1-6, wherein, The middle plate (200) has a through hole (N), the outer frame (100) has a supporting table (103) and a clamping portion (104) on the supporting table (103). After the portion of the middle plate (200) where the through hole (N) is arranged is located on the supporting table (103), the clamping portion (104) passes through the through hole (N) to clamp with the middle plate (200).

9. The middle frame assembly of any one of claims 1-6, wherein, The outer frame (100) is a frame structure made of titanium alloy or stainless steel.

10. An electronic device, comprising: Comprise: A middle frame assembly and components in the middle frame assembly, the middle frame assembly is any one of claims 1-9. A middle frame assembly and components in the middle frame assembly, the middle frame assembly is any one of claims 1-9.

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