Middle frame and electronic device
By designing a first part with higher tensile strength and a second part with lower tensile strength on the plate of the middle frame, and using brackets to transfer external forces, the problems of poor reliability and airtightness of the middle frame structure are solved, improving drop reliability and user experience.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HUAWEI TECH CO LTD
- Filing Date
- 2025-12-26
- Publication Date
- 2026-07-02
Smart Images
Figure CN2025146316_02072026_PF_FP_ABST
Abstract
Description
Mid-frame and electronic devices
[0001] This application claims priority to Chinese Patent Application No. 202411988525.0, filed on December 28, 2024, with the China National Intellectual Property Administration, entitled “Middle Frame and Electronic Device”, the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of terminal equipment, and in particular to a mid-frame and electronic device. Background Technology
[0003] As technology continues to develop, users' demands for the functional diversity of electronic devices are gradually increasing. The mid-frame of electronic devices, as the carrier of various components, is also required to perform multiple functions. Current electronic devices typically have a first part and a second part made of different materials within the mid-frame's central plate. The first part can be fixedly connected between the second part and the frame's edge. However, having two parts made of different materials within the mid-frame's central plate can affect the structural reliability of the mid-frame. When the mid-frame is subjected to external forces or drops, the parts with lower yield strength and tensile strength are prone to collapse and deformation, affecting the airtightness of the mid-frame, resulting in poor drop reliability and impacting the lifespan of the electronic device. Summary of the Invention
[0004] This application provides a mid-frame and an electronic device, aiming to provide a mid-frame with good drop reliability and long service life, and an electronic device including the mid-frame.
[0005] In a first aspect, a middle frame is provided. The middle frame includes a middle plate, a frame, and a support. The frame surrounds the middle plate and is fixedly connected to the middle plate. The middle plate includes a first part and a second part. The second part is fixedly connected between the first part and the frame. The tensile strength of the first part is greater than the tensile strength of the second part, and / or, the yield strength of the first part is greater than the yield strength of the second part. The support includes a main body, a supporting part, and a fixing part. The main body includes a first surface and a second surface disposed opposite to each other. The supporting part is fixedly connected to the main body and protrudes relative to the first surface. The fixing part is fixedly connected to the main body and protrudes relative to the second surface. The fixing part is spaced apart from the second part. At least a portion of the fixing part is embedded in the first part. The supporting part connects to the surface of the frame facing the middle plate.
[0006] It is understood that the middle plate of the middle frame in this embodiment includes a first part and a second part. The second part is fixedly connected between the side frame and the first part. The tensile strength of the first part is greater than that of the second part. The yield strength of the first part is greater than that of the second part. The middle frame may also include a bracket. The main body of the bracket can be fixedly connected to the first part of the middle plate, and the support part of the bracket can be connected to the side frame of the middle frame. In this way, when the middle frame falls, the impact force on the side frame can be transmitted sequentially through the support part and the main body of the bracket to the first part of the middle plate. At this time, the second part, which has weaker tensile and yield strength, will not be subjected to the impact force, thereby preventing the second part of the middle plate from collapsing and deforming under the impact force, causing the first and second parts to separate, which is beneficial to improving the structural reliability and drop reliability of the middle frame. At the same time, it can also prevent gaps from appearing between the first and second parts due to separation, which is beneficial to ensuring the airtightness of the middle frame.
[0007] In one possible implementation, the area of the surface of the support portion facing away from the main body is smaller than the area of the surface of the support portion facing the main body. In this way, when the frame is subjected to external force, the force can be evenly transmitted to the main body of the bracket through the support portion, making the support portion less prone to bending or breaking under external force, thereby improving the service life of the middle frame.
[0008] In one possible implementation, the support portion includes a first part and a second part. The first part and the second part of the support portion are stacked. The second part of the support portion is fixedly connected between the first part and the main body. The area of the second part of the support portion gradually increases towards the main body. In this way, when the frame is subjected to external force, the force can be evenly transmitted to the main body of the bracket through the support portion, making the support portion less prone to bending or breakage under external force, thereby improving the service life of the middle frame.
[0009] In one possible implementation, the thermal conductivity of the bracket is lower than that of the first part of the middle plate. This way, when the electronic device is operating, the heat generated by its heat-generating components is absorbed by the first part of the middle plate and will not be transferred to the frame through the bracket, thus preventing the frame temperature from rising and affecting the user's grip, thereby improving the user experience.
[0010] In one possible implementation, the main body, support, and fixing parts are integrally formed. This improves the structural strength of the support structure, making it less susceptible to damage from external forces.
[0011] In one possible implementation, the mid-frame also includes a connector sandwiched between the support and the frame. This way, when the frame is subjected to external force (such as when the mid-frame falls), the impact force can be transmitted to the support of the bracket through the connector and evenly distributed across the entire plane of the support. This results in a more uniform stress distribution on the support, preventing breakage due to stress concentration and improving the structural and drop reliability of the mid-frame.
[0012] In one possible implementation, the elastic modulus of the connector is less than that of the support. This way, when the frame is subjected to external force (such as when the middle frame falls), the impact force on the frame can be transmitted to the support of the bracket through the connector and evenly distributed across the entire plane of the support. This results in a more uniform stress distribution on the support, preventing breakage due to stress concentration and thus improving the structural and drop reliability of the middle frame.
[0013] In one possible implementation, the middle frame also includes an adhesive layer, which is fixedly connected between the middle plate and the main body. This adhesive layer ensures a more reliable connection between the middle plate and the main body of the support frame, thereby improving the structural reliability of the middle frame.
[0014] In one possible implementation, the frame includes a frame and a connecting portion. The connecting portion is fixed to the side of the frame facing the middle plate. A portion of the frame is fixedly connected to the middle plate, and another portion is fixedly connected to the middle plate via the connecting portion. A portion of the frame constitutes an antenna radiator. A second portion of the middle plate includes a first sub-part and a second sub-part connected together. The first sub-part is fixedly connected between the antenna radiator and the first portion of the middle plate. The second sub-part is fixedly connected between the connecting portion and the first portion of the middle plate. The projection of the bracket onto the plane of the middle plate overlaps with the second sub-part.
[0015] It is understood that in this embodiment, the first sub-part is fixedly connected between the antenna radiator and the first part of the middle plate. In this way, the first sub-part can be used to provide clearance for the antenna radiator, thereby avoiding electromagnetic interference to the antenna radiator and helping to ensure the antenna performance of the antenna radiator.
[0016] In one possible implementation, the width of the second sub-section is smaller than the width of the first sub-section. This way, with the dimensions of the middle frame and the first sub-section remaining unchanged, the volume of the second sub-section is smaller, meaning the volume of the second part of the middle plate occupies a smaller proportion of the total volume of the middle plate. In this case, the volume of the stronger first part occupies a larger proportion of the total volume of the middle plate, which helps ensure the structural strength of the middle frame.
[0017] In one possible implementation, the projection of the support portion onto the plane of the middle plate is spaced apart from the first sub-part. This creates a certain distance between the support portion and the first radiator, thereby preventing the support portion of the bracket from affecting the radiation performance of the antenna radiator.
[0018] In one possible implementation, the number of fixing parts is greater than or equal to three. Some of the fixing parts are embedded in the first part of the middle plate, and another part is embedded in the connecting part.
[0019] Understandably, compared to a typical middle frame that only includes two fixing parts located on both sides of the second sub-section, the middle frame can only effectively transmit force to the first part of the middle plate when it is subjected to an impact force along the line connecting these two fixing parts, resulting in poor drop reliability. In this embodiment, the middle frame has three or more fixing parts, distributed on both sides of the second sub-section. When the middle frame is subjected to an impact force along the line connecting any two of the fixing parts distributed on both sides of the second sub-section, the middle frame can effectively transmit force to the first part through these fixing parts. That is, the middle frame in this embodiment can resist impact forces from at least two directions, resulting in better structural and drop reliability.
[0020] In one possible implementation, the second sub-section includes a first segment and a second segment connected together. The first segment and the second segment are arranged at an angle. Thus, when the middle frame is dropped and subjected to impact (e.g., when the middle frame is subjected to an impact force perpendicular to the length extension direction of the first segment or perpendicular to the length extension direction of the second segment), the first part of the middle plate can effectively support the first or second segment of the second sub-section. This effectively prevents misalignment or slippage between the second sub-section and the first part of the middle plate, ensuring the reliability of the connection between the second sub-section and the first part of the middle plate, guaranteeing the structural stability of the middle frame, and extending the service life of the middle frame.
[0021] In one possible implementation, the length extension direction of the first segment is parallel to the length direction of the middle frame, and / or the length extension direction of the second segment is parallel to the width direction of the middle frame. In this way, when the middle frame is dropped and subjected to impact (e.g., when the middle frame is subjected to impact force perpendicular to the length direction or the thickness direction of the middle frame), the first part of the middle plate can better support the first or second segment of the second sub-section, thereby effectively preventing misalignment or slippage between the second sub-section and the first part of the middle plate. This helps ensure the reliability of the connection between the second sub-section and the first part of the middle plate, guarantees the structural stability of the middle frame, and helps extend the service life of the middle frame.
[0022] In one possible implementation, the conductivity of the bracket is greater than that of the second part of the middle plate. This allows one end of the bracket to be electrically connected to the metal portion of the middle plate, and the other end to be electrically connected to the frame. The antenna radiator can be grounded through the bracket, or the motherboard of the electronic device can sequentially power the antenna radiator through the bracket.
[0023] In one possible implementation, the thermal conductivity of the second part of the middle plate is lower than that of the first part. This allows the second part of the middle plate to effectively isolate heat transfer between the first part and the frame, thus preventing heat generated by the electronic device's heating components from being transferred from the first part of the middle plate to the frame during operation. This would prevent the frame temperature from rising, affecting the user's feel and improving the user experience.
[0024] Secondly, an electronic device is provided. The electronic device includes a screen, a back cover, and the aforementioned mid-frame. The screen and back cover are fixed to opposite sides of the mid-frame. The electronic device in this embodiment exhibits good drop resistance and a long service life. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.
[0026] Figure 1 is a schematic diagram of the structure of the electronic device provided in some embodiments of this application;
[0027] Figure 2 is an exploded structural diagram of the electronic device shown in Figure 1 in some embodiments;
[0028] Figure 3 is a structural schematic diagram of the middle frame shown in Figure 2 in some embodiments;
[0029] Figure 4 is an exploded structural diagram of a portion of the middle frame shown in Figure 3 in some embodiments.
[0030] Figure 5 is a partial structural diagram of the main structure of the middle frame shown in Figure 4 in some embodiments;
[0031] Figure 6 is a partial cross-sectional structural diagram of one embodiment of the middle frame described in Figure 3 cut along point AA;
[0032] Figure 7 is a partial structural schematic diagram of the main body of the middle frame shown in Figure 4 in some embodiments;
[0033] Figure 8 is a schematic diagram of the structure shown in Figure 7 from another perspective;
[0034] Figure 9a is a structural schematic diagram of the bracket shown in Figure 4 in some embodiments;
[0035] Figure 9b is a structural schematic diagram of the support shown in Figure 9a from another perspective;
[0036] Figure 10 is an exploded structural diagram of the support shown in Figure 4 in another embodiment;
[0037] Figure 11 is a schematic diagram of the assembly structure of a portion of the middle frame shown in Figure 4 in some embodiments;
[0038] Figure 12 is a partial cross-sectional structural diagram of one embodiment of the middle frame shown in Figure 3, cut along BB.
[0039] Figure 13 is a partial cross-sectional structural diagram of one embodiment of the middle frame shown in Figure 3 cut along CC;
[0040] Figure 14 is a partial cross-sectional structural diagram of one embodiment of the middle frame shown in Figure 3 cut along DD;
[0041] Figure 15 is a schematic diagram of the enlarged structure of the middle frame at point E shown in Figure 5 in another embodiment;
[0042] Figure 16 is a schematic diagram of the enlarged structure of the middle frame at point E shown in Figure 5 in another embodiment. Detailed Implementation
[0043] The embodiments of this application are described below with reference to the accompanying drawings.
[0044] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "inner," and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to at least two.
[0045] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.
[0046] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0047] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in another embodiment" appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0048] It is understood that the specific embodiments described herein are merely for explaining the relevant invention and not for limiting the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0049] Figure 1 is a structural schematic diagram of the electronic device 1000 provided in some embodiments of this application. Figure 2 is an exploded structural schematic diagram of the electronic device 1000 shown in Figure 1 in some embodiments.
[0050] As shown in Figures 1 and 2, the electronic device 1000 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), personal computer, laptop computer, wearable device, etc. Figure 1 illustrates the electronic device 1000 using a mobile phone as an example. It should be noted that Figures 1 and 2, as well as the related figures below, only schematically show some components of the electronic device 1000. The actual shape, size, position, and structure of these components are not limited by Figure 1 and the figures below. For ease of description, the width direction of the electronic device 1000 is defined as the X-axis, the length direction as the Y-axis, and the thickness direction as the Z-axis. It is understood that the coordinate system of the electronic device 1000 can be flexibly set according to specific practical needs.
[0051] For example, the electronic device 1000 may include a screen 100, a mid-frame 200, and a back cover 300. The screen 100 and the back cover 300 may be fixed to opposite sides of the mid-frame 200, and together enclose the internal space 400 of the electronic device 1000. The screen 100 may be used to display images, text, etc. The internal space 400 of the electronic device 1000 may be used to house other internal components, such as a battery, speaker, microphone, and earpiece.
[0052] Figure 3 is a structural schematic diagram of the middle frame 200 shown in Figure 2 in some embodiments. Figure 4 is an exploded structural schematic diagram of a portion of the middle frame 200 shown in Figure 3 in some embodiments.
[0053] As shown in Figures 3 and 4, the middle frame 200 may include a middle plate 10, a frame 20, and a bracket 30. The frame 20 may be fixedly connected to the periphery of the middle plate 10 and, together with the middle plate 10, enclose the mounting space 200a of the middle frame 200. In this case, the middle plate 10 and the frame 20 together constitute the main body 200b of the middle frame 200. The mounting space 200a of the middle frame 200 may constitute at least a portion of the internal space 400 of the electronic device 1000. The bracket 30 may be located in the mounting space 200a of the middle frame 200 and may be fixedly connected to the middle frame 200. For example, the bracket 30 may be fixedly connected to the middle plate 10. The bracket 30 may also connect to the surface of the frame 20 facing the mounting space 200a.
[0054] Figure 5 is a partial structural schematic diagram of the main body 200b of the middle frame shown in Figure 4 in some embodiments. Figure 6 is a partial cross-sectional schematic diagram of the middle frame 200 shown in Figure 3 cut along point AA in one embodiment. Figure 7 is a partial structural schematic diagram of the main body 200b of the middle frame shown in Figure 4 in some embodiments. Figure 8 is a structural schematic diagram of the structure shown in Figure 7 from another perspective. It should be noted that, for ease of understanding, the second part 12 of the middle plate 10 is hidden in both Figures 5 and 6.
[0055] As shown in Figures 5 to 8, the frame 20 may include a frame body 21 and a plurality of spaced-apart connecting portions 22. The frame body 21 may include metallic and / or non-metallic materials. In this embodiment, the frame body 21 may include both metallic and non-metallic materials. In other embodiments, the frame body 21 may include only metallic materials. In this case, the frame body 21 may be a metal frame; or, the frame body 21 may include only plastic materials. In this case, the frame body 21 may be a plastic frame.
[0056] For example, the frame 21 may have multiple slots 23. The metal portion of the frame 21 located between two adjacent slots 23 may constitute the antenna radiator 500 of the electronic device 1000. The antenna radiator 500 may be used to receive / transmit signals. The connecting portion 22 may be made of metal. The connecting portion 22 may be fixedly connected between the frame 21 and the middle plate 10. One end of a portion of the connecting portion 22 may be fixedly connected to the antenna radiator 500, and the other end may be electrically connected to the motherboard or metal portion of the electronic device 1000. Thus, the motherboard of the electronic device 1000 may supply power to the antenna radiator 500 through the connecting portion 22. Alternatively, the antenna radiator 500 may also be grounded through the connecting portion 22. For example, one end of a portion of the connecting portion 22 may be fixedly connected to the metal portion of the frame 21, and the other end may be fixedly connected to the metal portion of the middle plate 10. Thus, the metal portion of the frame 21, the connecting portion 22, and the metal portion of the middle plate 10 may be integrally formed, which is beneficial to improving the structural reliability of the middle frame 200.
[0057] For example, the middle plate 10 of the middle frame 200 may include a first portion 11 and a second portion 12. A portion of the first portion 11 may have a gap 13 between it and the edge frame 20. A portion of the first portion 11 may be fixedly connected to the edge frame 20 (e.g., fixedly connected to the connecting portion 22). The second portion 12 may fill the gap 13 and fixedly connect the edge frame 20 and the first portion 11 of the middle plate 10. That is, the second portion 12 of the middle plate 10 may be fixedly connected between the first portion 11 and the edge frame 20. At least a portion of the second portion 12 may be located between the antenna radiator 500 and the first portion 11.
[0058] For example, the first part 11 can be made of a metallic material, such as titanium alloy or aluminum alloy. The first part 11 can be fixedly connected to the connecting part 22. The second part 12 can be made of a non-metallic material, such as plastic. The plastic can be polybutylene terephthalate (PBT) material with 20% glass fiber (GF) added. For example, the dielectric constant of the plastic particles can be less than 3, and the dielectric loss factor can be less than 0.01. In this case, the portion of the second part 12 located between the antenna radiator 500 and the first part 11 can be used to provide clearance for the antenna radiator 500, thereby preventing the antenna radiator 500 from being affected by electromagnetic wave interference and helping to ensure the antenna performance of the antenna radiator 500. For example, the second part 12 can be filled into the gap 13 by injection molding or other methods.
[0059] The tensile strength of the first part 11 can be greater than that of the second part 12. The yield strength of the first part 11 can also be greater than that of the second part 12. For example, the volume of the first part 11 can be greater than the volume of the second part 12. This results in a higher proportion of the volume of the first part 11 to the total volume of the middle plate 10, which is beneficial for ensuring the structural strength of the middle frame 200. In other embodiments, the strengths of the first part 11 and the second part 12 can also have other relationships.
[0060] Please refer again to Figures 3 to 6. The frame 21 of the middle frame 200 may include a first short side 211, a first corner 212, a first long side 213, a second corner 214, a second short side 215, a third corner 216, a second long side 217, and a fourth corner 218 connected end to end. The first short side 211 may have a first gap 231. The first long side 213 may have a second gap 232. The first corner 212 may be located between the first gap 231 and the second gap 232.
[0061] For example, the electronic device 1000 may have multiple antenna radiators 500, such as a first radiator 510, a second radiator 520, and a third radiator 530. The first radiator 510 may be formed by a metal portion in the frame 21 located between the first gap 231 and the second gap 232. That is, the metal portion in the first corner 212 may constitute part of the first radiator 510. The second radiator 520 may be located on the side of the first gap 231 facing away from the first corner 212. At least a portion of the second radiator 520 may be formed on the first short side 211. The third radiator 530 may be located on the side of the second gap 232 facing away from the first corner 212. At least a portion of the third radiator 530 may be formed on the first long side 213.
[0062] For example, the plurality of connecting portions 22 may include a first connecting portion 221 and a second connecting portion 222. The first connecting portion 221 may be fixedly connected to the first radiator 510, that is, the first connecting portion 221 may be fixedly connected to the first corner portion 212. The other end of the first connecting portion 221 may be electrically connected to the metal portion of the middle plate 10 (that is, the first portion 11 of the middle plate 10 in this embodiment). In this way, the first radiator 510 can be grounded through the first connecting portion 221, or the motherboard of the electronic device 1000 can supply power to the first radiator 510 through the first connecting portion 221.
[0063] In this embodiment, the first short side 211 may also have a third gap 233. The second radiator 520 may be located between the first gap 231 and the third gap 233. That is, the second radiator 520 may be formed on the first short side 211. The first long side 213 may also have a fourth gap 234. The third radiator 530 may be formed between the second gap 232 and the fourth gap 234. That is, the third radiator 530 may be formed on the first long side 213. In other embodiments, the third gap 233 and / or the fourth gap 234 may also be formed at other locations on the frame 21. This application does not specifically limit this.
[0064] For example, there can be multiple second connecting portions 222. The second connecting portions 222 can be fixedly connected between the metal portion of the frame 21 and the first portion 11 of the middle plate 10. For instance, some of the second connecting portions 222 can be fixedly connected between the metal portion of the second long side 217 and the first portion 11 of the middle plate 10. In this way, the metal portion of the second long side 217, the second connecting portions 222, and the metal portion of the middle plate 10 (which in this embodiment is also the first portion 11 of the middle plate 10) are all metal portions and can be integrally formed, which is beneficial for improving the structural strength of the middle frame 200. Some of the second connecting portions 222 can be fixedly connected between the metal portion of the fourth corner portion 218 and the first portion 11 of the middle plate 10.
[0065] Referring again to Figures 7 and 8, gap 13 may include a first sub-gap 131 and a second sub-gap 132. The first sub-gap 131 may be located between the antenna radiator 500 and the first portion 11, that is, between the frame 21 and the first portion 11. For example, a portion of the first sub-gap 131 may be located between the first radiator 510 and the first portion 11, a portion may be located between the second radiator 520 and the first portion 11, and a portion may also be located between the third radiator 530 and the first portion 11. The second sub-gap 132 may be located between the first connecting portion 221 and the first portion 11. The second sub-gap 132 may connect to the first sub-gap 131. For example, the second sub-gap 132 may be located between the first connecting portion 221 and the first portion 11. The width of the second sub-gap 132 may be less than or equal to 2 mm; for example, the width of the second sub-gap 132 may be 1 mm. The width of the second sub-gap 132 may be less than the width of the first sub-gap 131.
[0066] Exemplarily, the second part 12 may include a connected first sub-part 121 and a second sub-part 122. The first sub-part 121 may fill within the first sub-gap 131. The first sub-part 121 may be fixedly connected to the frame 21 and the first part 11. In this case, the first sub-part 121 may be used to provide clearance for the antenna radiators 500 (i.e., the first radiator 510, the second radiator 520, and the third radiator 530 in this embodiment). The second sub-part 122 may fill within the second sub-gap 132. The second sub-part 122 may be fixedly connected to the first connecting part 221 and the first part 11. The thermal conductivity of the second part 12 may be less than that of the first part 11. It should be noted that the first sub-part 121 and the second sub-part 122 of the second part 12 are schematically divided by a relatively wide dashed line in FIG6 and subsequent figures.
[0067] Exemplarily, the middle plate 10 may also have a mounting slot 11a. The mounting slot 11a may be located in the first portion 11 of the middle plate 10. The mounting slot 11a may communicate with the mounting space 200a of the middle frame 200. The mounting slot 11a may be positioned close to the first corner 212 relative to the second corner 214, third corner 216, and fourth corner 218 of the middle frame 200 (see FIG. 4). The mounting slot 11a may be used to accommodate heat-generating devices (including but not limited to chips, camera assemblies, etc.) of the electronic device 1000. In other embodiments, the mounting slot 11a may also be located at other positions on the middle plate 10.
[0068] It is understood that in this embodiment, a second sub-gap 132 is formed between the first connecting portion 221 and the first portion 11 of the middle plate 10, and a second portion 12 (which in this embodiment forms the second sub-part 122 of the second portion 12 of the middle plate 10) is filled in the second sub-gap 132. The thermal conductivity of the second portion 12 can be less than that of the first portion 11. Thus, the second sub-gap 132 can form a heat insulation groove, and the second sub-part 122 of the second portion 12 of the middle plate 10 can effectively isolate heat transfer between the first portion 11 and the first connecting portion 221. This effectively prevents heat generated by the heating element of the electronic device 1000 from being transferred from the first portion 11 of the middle plate 10 to the frame 20 during operation, thus avoiding an increase in the temperature of the frame 20 and affecting the user's feel, thereby improving the user experience.
[0069] Figure 9a is a structural schematic diagram of the bracket 30 shown in Figure 4 in some embodiments. Figure 9b is a structural schematic diagram of the bracket 30 shown in Figure 9a from another perspective. Figure 10 is an exploded structural schematic diagram of the bracket shown in Figure 4 in another embodiment;
[0070] As shown in Figures 9a to 10, the bracket 30 may include a main body 31, a support 32, and a fixing part 33. The main body 31 may include a first surface 31a and a second surface 31b disposed opposite to each other. The support 32 may be fixedly connected to the main body 31 and protrudes from the first surface 31a of the main body 31. The fixing part 33 may be fixedly connected to the main body 31 and protrudes from the second surface 31b of the main body 31. There may be one or more support parts 32 and fixing parts 33. Exemplarily, the bracket 30 may be made of metal. In this embodiment, the main body 31, support 32, and fixing part 33 of the bracket 30 may be integrally formed, that is, the bracket 30 may be a one-piece structure. This improves the structural strength of the bracket 30. Referring to Figure 10, in other embodiments, the main body 31, support 32, and fixing part 33 of the bracket 30 may also be independent structural components. The main body 31, support 32, and fixing part 33 of the bracket 30 can be processed separately and then assembled together by welding, bonding, or other methods. This can save machine tool processing time required during the production of the bracket 30, and also save on the material costs of producing the bracket 30.
[0071] Exemplarily, the number of support portions 32 can be one. The support portion 32 can be located at the edge of the main body portion 31. The support portion 32 can be arranged at an angle to the main body portion 31. The support portion 32 can include a connected first portion 321 and a second portion 322. The first portion 321 and the second portion 322 of the support portion 32 can be stacked. The second portion 322 of the support portion 32 can be fixedly connected between the first portion 321 and the main body portion 31 of the bracket 30. Exemplarily, the area of the second portion 322 of the support portion 32 can gradually increase in the direction close to the main body portion 31. Exemplarily, in some embodiments, the second portion 322 of the support portion 32 can be wedge-shaped or trapezoidal. It should be noted that in Figures 9a to 10 and subsequent figures, the main body portion 31 of the bracket 30, the first portion 321 of the support portion 32, and the second portion 322 of the support portion 32 are schematically divided by dashed lines.
[0072] For example, the number of fixing parts 33 can be greater than or equal to 3. In this embodiment, the number of fixing parts 33 can be 3, for example, it may include a first fixing part 331, a second fixing part 332 and a third fixing part 333. The first fixing part 331, the second fixing part 332 and the third fixing part 333 can be arranged at intervals.
[0073] Figure 11 is a schematic diagram of the assembly structure of a portion of the middle frame 200 shown in Figure 4 in some embodiments. Figure 12 is a schematic diagram of a partial cross-sectional structure of the middle frame 200 shown in Figure 3 cut along BB in one embodiment. Figure 13 is a schematic diagram of a partial cross-sectional structure of the middle frame 200 shown in Figure 3 cut along CC in one embodiment.
[0074] As shown in Figures 11 to 13, the middle frame 200 may also have mounting holes 14 (the specific structure of the mounting holes 14 is also shown in Figures 7 and 8). The mounting holes 14 can connect to the mounting space 200a of the middle frame 200. The mounting holes 14 can be spaced apart from the second part 12 of the middle plate 10. The number of mounting holes 14 can be three, for example, including a first mounting hole 141, a second mounting hole 142, and a third mounting hole 143. The first mounting holes 141, the second mounting holes 142, and the third mounting holes 143 can be spaced apart from each other. The first mounting holes 141, the second mounting holes 142, and the third mounting holes 143 can be distributed on both sides of the second sub-part 122 of the second part 12. Exemplarily, the first mounting holes 141 and the second mounting holes 142 can be located in the first part 11 of the middle plate 10 and can penetrate the middle plate 10. The third mounting hole 143 can be located in the first connecting part 221 of the frame 20 and can penetrate the first connecting part 221.
[0075] For example, the fixing part 33 of the bracket 30 can pass through the mounting hole 14 of the middle frame 200. For instance, the first fixing part 331, the second fixing part 332, and the third fixing part 333 of the bracket 30 can be correspondingly passed through the first mounting hole 141, the second mounting hole 142, and the third mounting hole 143 of the middle frame 200. That is, the fixing part 33 of the bracket 30 can be embedded in the middle frame body 200b. At this time, the fixing part 33 can be spaced apart from the second part 12 of the middle plate 10. At least a portion of the fixing part 33 can be embedded in the first part 11 of the middle plate 10. The first fixing part 331, the second fixing part 332, and the third fixing part 333 can be distributed on both sides of the second sub-part 122 of the second part 12 of the middle plate 10.
[0076] The first fixing part 331 and the second fixing part 332 can be fixed to the first part 11 of the middle plate 10. The third fixing part 333 can be fixed to the first connecting part 221 of the frame 20. Exemplarily, the first fixing part 331, the second fixing part 332, and the third fixing part 333 can all be rivets. That is, the bracket 30 can be fixedly connected to the middle plate 10 by riveting. In other embodiments, the bracket 30 can also be fixedly connected to the middle plate 10 by welding, screwing, or other methods. One or more of the first fixing part 331, the second fixing part 332, and the third fixing part 333 can also be in the form of screws, solder pads, etc.
[0077] The main body 31 of the bracket 30 can be stacked on the middle plate 10. The main body 31 of the bracket 30 may also have clearance holes to avoid structural protrusions on the middle plate 10. The support portion 32 of the bracket 30 can be connected to the frame 21 of the frame 20. Exemplarily, the support portion 32 of the bracket 30 may be located on the side of the first corner 212 of the frame 20 facing the mounting space 200a, and may be connected to the first corner 212. The side of the second portion 322 of the support portion 32 facing away from the frame 20 may be a curved surface or a sloped surface.
[0078] For example, in the thickness direction of the middle frame 200 (i.e., the Z-axis direction in this embodiment), the main body 31 of the bracket 30 can be positioned directly opposite the second sub-gap 132 of the middle plate 10, that is, the main body 31 of the bracket 30 can be positioned directly opposite the second sub-gap 122 of the second portion 12 of the middle plate 10. The projection of the main body 31 onto the plane of the middle plate 10 can overlap with the first connecting interface 10a and the second connecting interface 10b of the middle plate 10. For example, the projection of the main body 31 onto the plane of the middle plate 10 can completely cover the second sub-gap 132, that is, completely cover the second sub-gap 122. The projection of the main body 31 of the bracket 30 onto the plane of the middle plate 10 can completely cover the first connecting interface 10a and the second connecting interface 10b.
[0079] For example, the thermal conductivity of the bracket 30 can be less than that of the first portion 11 of the middle plate 10. The electrical conductivity of the bracket 30 can be greater than that of the second portion 12 of the middle plate 10. In some embodiments, the electrical conductivity of the bracket 30 can be equal to that of the first portion 11 of the middle plate 10. In this way, the first connecting portion 221 can be electrically connected to the metal portion of the middle plate 10 (i.e., the first portion 11 of the middle plate 10 in this embodiment) through the bracket 30, so that the first radiator 510 can be grounded through the first connecting portion 221 and the bracket 30, or the motherboard of the electronic device 1000 can supply power to the first radiator 510 through the first connecting portion 221 and the bracket 30.
[0080] It is understandable that, compared to a typical mid-frame, which consists of a first part and a second part made of different materials, the first part is made of metal and the second part is made of non-metallic material. The yield strength and tensile strength of the first part are greater than those of the second part. When the mid-frame is subjected to external force or drops, the second part, with its lower yield strength and tensile strength, is prone to collapse and deformation, affecting the airtightness of the mid-frame and its drop reliability, thus impacting the lifespan of the electronic device. Furthermore, when the first part of the mid-frame is made of aluminum alloy and the second part is made of plastic, it can also cause plastic failure and aluminum-plastic separation. In this embodiment, the mid-frame 200 may also include a bracket 30. The main body 31 and the support 32 of the bracket 30 are set at an angle. The main body 31 of the bracket 30 can be fixedly connected to the first part 11 of the mid-plate 10, and the support 32 of the bracket 30 can be connected to the frame 20 of the mid-frame 200. When the middle frame 200 falls, the impact force on the frame 20 can be transmitted sequentially through the support portion 32 and the main body portion 31 of the bracket 30, ultimately reaching the first part 11 of the middle plate 10. At this time, the second part 12, with its weaker tensile and yield strength, will not be affected by the impact force, thus preventing the second part 12 of the middle plate 10 from collapsing and deforming under the impact force, which would cause the first part 11 and the second part 12 to separate. This improves both the structural and drop reliability of the middle frame 200, and prevents gaps from forming between the first part 11 and the second part 12 due to separation, ensuring the airtightness of the middle frame 200. Furthermore, it avoids plastic failure and aluminum-plastic separation problems that can occur when the first part 11 is made of aluminum alloy and the second part 12 is made of plastic, due to the impact force.
[0081] Secondly, in this embodiment, the area of the second portion 322 of the support portion 32 facing away from the main body portion 31 of the support 30 can be larger than the area of the second portion 322 of the support portion 32 facing the main body portion 31 of the support 30. The width of the second portion 322 of the support portion 32 increases gradually in the direction toward the main body portion 31 of the support 30. In this way, when the frame 20 is subjected to external force, the force can be evenly transmitted to the main body portion 31 of the support 30 through the support portion 32, making the support portion 32 less prone to bending or breaking under external force, thereby improving the service life of the middle frame 200.
[0082] Furthermore, the thermal conductivity of the bracket 30 in this embodiment can be less than that of the first part 11 of the middle plate 10. In this way, when the electronic device 1000 is working, the heat generated by the heat-generating device of the electronic device 1000 is absorbed by the first part 11 of the middle plate 10 and will not be transferred to the frame 20 through the bracket 30, which would cause the temperature of the frame 20 to rise and affect the user's feel, thus improving the user experience.
[0083] Furthermore, the conductivity of the bracket 30 in this embodiment can be greater than that of the second part 12 of the middle plate 10. Thus, the first connecting part 221 can be electrically connected to the first part 11 of the middle plate 10 via the bracket 30, allowing the antenna radiator 500 to be grounded via the first connecting part 221 and the bracket 30, or the motherboard of the electronic device 1000 to supply power to the antenna radiator 500 via the first connecting part 221 and the bracket 30.
[0084] In some embodiments, the bracket 30 may not include the second fixing part 332, the middle plate 10 may not include the second mounting hole 142, and / or the bracket 30 may not include the third fixing part 333, and the middle plate 10 may not include the third mounting hole 143.
[0085] In some embodiments, the plurality of fixing portions 33 of the bracket 30 may be located only on one side of the second sub-part 122 of the second portion 12 of the middle plate 10. For example, the plurality of fixing portions 33 of the bracket 30 may be located on the side of the second sub-part 122 facing away from the first corner portion 212.
[0086] In some embodiments, the middle frame 200 may further include an adhesive layer 40 (the specific structure of the adhesive layer 40 is also shown in Figure 4). The adhesive layer 40 can be fixedly connected between the main body 31 of the bracket 30 and the middle plate 10. In this way, the adhesive layer 40 can make the connection between the middle plate 10 and the main body 31 of the bracket 30 more reliable, thereby making the connection between the middle plate 10 and the bracket 30 more reliable and improving the structural reliability of the middle frame 200.
[0087] Referring again to Figure 7, the second sub-part 122 may include a first segment 122a and a second segment 122b that are connected. The first segment 122a may be set at an angle to the second segment 122b. The length extension direction of the first segment 122a may be approximately parallel to the length direction of the middle frame 200 (i.e., the Y-axis direction in this embodiment). The length extension direction of the second segment 122b may be approximately parallel to the width direction of the middle frame 200 (i.e., the X-axis direction in this embodiment). In this case, the second sub-part 122 may be approximately "L"-shaped. Both the first connecting interface 10a and the second connecting interface 10b may also be approximately "L"-shaped. It should be noted that in this embodiment, the parallel arrangement of any two straight lines is strictly parallel in a mathematical sense; however, the parallelism of any two straight lines can be approximately parallel. For example, any two straight lines with an angle between 0° and 10° can be considered parallel.
[0088] In other embodiments, the second sub-part 122 may also have other shapes. For example, the second sub-part 122 may only include the first segment 122a. The second sub-part 122 may be generally arc-shaped. In this case, the first connecting interface 10a and the second connecting interface 10b may also be generally arc-shaped. It should be noted that in FIG7 and subsequent figures, the first segment 122a and the second segment 122 of the second sub-part 122 of the second part 12 of the middle plate 10 are schematically divided by dense dashed lines.
[0089] For example, the middle plate 10 may also have a boss 11b (the specific structure of the boss 11b is also shown in Figure 4). The boss 11b may be located on the surface of the first part 11 facing the mounting space 200a and fixedly connected to the first part 11. The boss 11b may be located on the side of the second sub-part 122 facing away from the first connecting part 221. The boss 11b may protrude relative to the first part 11. The main body 31 of the bracket 30 may be stacked on the boss 11b. The first fixing part 331 and the second fixing part 332 of the bracket may be embedded in the boss 11b. In this way, the boss 11b can provide support for the bracket 30, making the connection between the bracket 30 and the middle frame body 200b more reliable, thereby improving the structural reliability and drop reliability of the middle frame 200.
[0090] For example, the straight line connecting the first mounting hole 141 and the third mounting hole 143 of the middle frame 200 can intersect the second sub-part 122 of the second part 12 of the middle plate 10. The straight line connecting the second mounting hole 142 and the third mounting hole 143 of the middle frame 200 can also intersect the second sub-part 122 of the second part 12 of the middle plate 10. At this time, the lines connecting the first fixing part 331 and the third fixing part 333 of the bracket 30, and the lines connecting the second fixing part 332 and the third fixing part 333, can also intersect the second sub-part 122 of the second part 12 of the middle plate 10.
[0091] For example, the line connecting the first mounting hole 141 and the third mounting hole 143 of the middle plate 10 can be perpendicular to the first segment 122a of the second sub-part 122. The line connecting the second mounting hole 142 and the third mounting hole 143 of the middle plate 10 can be perpendicular to the second segment 122b of the second sub-part 122. At this time, the line connecting the first fixing part 331 and the third fixing part 333 of the bracket 30 is perpendicular to the first segment 122a of the second sub-part 122 of the middle plate 10. The line connecting the second fixing part 332 and the third fixing part 333 of the bracket 30 is perpendicular to the second segment 122b of the second sub-part 122 of the middle plate 10. It should be noted that in this embodiment, the perpendicularity of any two lines is not strictly perpendicular in a mathematical sense. The perpendicularity of any two lines can be approximately perpendicular. For example, any two lines with an included angle between 80° and 100° can be considered perpendicular.
[0092] Understandably, compared to a typical middle frame that only includes two fixing parts distributed on both sides of the second sub-section, the middle frame can only effectively transmit the force to the first part of the middle plate when it is subjected to an impact force along the line connecting these two fixing parts, resulting in poor drop reliability. In this embodiment, the middle frame 200 has three or more fixing parts 33. These fixing parts 33 are distributed on both sides of the second sub-section 122. When the middle frame 200 is subjected to an impact force along the line connecting any two of the fixing parts 33 distributed on both sides of the second sub-section 122, the middle frame 200 can effectively transmit the force to the first part 11 through these fixing parts. That is, the middle frame 200 in this embodiment can resist impact forces from at least two directions, resulting in better structural and drop reliability.
[0093] Secondly, in this embodiment, the straight line connecting the first fixing part 331 and the third fixing part 333 of the bracket 30, and the straight line connecting the second fixing part 332 and the third fixing part 333, can intersect with the first connecting interface 10a and the second connecting interface 10b of the middle plate 10. When the middle frame 200 is subjected to a force along the line connecting the first fixing part 331 and the third fixing part 333, the middle frame 200 can transmit the force to the first part 11 of the middle plate 10 through the first fixing part 331 and the third fixing part 333. When the middle frame 200 is subjected to a force along the line connecting the second fixing part 332 and the third fixing part 333, the middle frame 200 can transmit the force to the first part 11 of the middle plate 10 through the second fixing part 332 and the third fixing part 333.
[0094] In other words, by providing multiple fixing parts 33 on the bracket 30 and distributing the multiple fixing parts 33 on both sides of the second sub-part 122 of the middle plate 10, when the middle frame 200 falls, the impact force on the frame 20 can be better transmitted to the first part 11 of the middle plate 10 through the bracket 30. This can prevent the second part 12 of the middle plate 10 from being subjected to a large impact force and collapsing and deforming, thereby causing the first part 11 and the second part 12 of the middle plate 10 to separate. This can improve the structural reliability and drop reliability of the middle frame 200.
[0095] Furthermore, multiple fixing parts 33 of the bracket 30 are distributed on both sides of the second sub-part 122 of the middle plate 10. The bracket 30 is made of metal. Thus, one end of the bracket 30 can be electrically connected to the metal part of the middle plate 10 (i.e., the first part of the middle plate 10 in this embodiment), and the other end can be electrically connected to the first connecting part 221 of the frame 20. In this way, the first radiator 510 can be grounded sequentially through the first connecting part 221 and the bracket 30, or the motherboard of the electronic device 1000 can supply power to the first radiator 510 sequentially through the bracket 30 and the first connecting part 221.
[0096] Furthermore, compared to the arc-shaped middle frame of the second sub-section, when the middle frame is dropped and subjected to impact, the second sub-section will shift and slide against the first part of the middle plate under the impact force, affecting the reliability of the connection between the second sub-section and the first part of the middle plate, affecting the structural stability of the middle frame, and shortening the service life of the middle frame. In this embodiment, the second sub-section 122 may include a first segment 122a and a second segment 122b arranged at an angle. In this way, when the middle frame 200 is dropped and subjected to impact (for example, when the middle frame 200 is subjected to impact along the length extension direction perpendicular to the first segment 122a or the length extension direction perpendicular to the second segment 122b), the first part 11 of the middle plate 10 can better support the first segment 122a or the second segment 122b of the second sub-part 122, thereby effectively preventing the second sub-part 122 from shifting or sliding with the first part 11 of the middle plate 10. This helps to ensure the reliability of the connection between the second sub-part 122 and the first part 11 of the middle plate 10, ensures the structural stability of the middle frame 200, and helps to extend the service life of the middle frame 200.
[0097] Furthermore, in this embodiment, the line connecting the first fixing part 331 and the third fixing part 333 of the bracket 30 is perpendicular to the first segment 122a of the second sub-part 122 of the middle plate 10. The line connecting the second fixing part 332 and the third fixing part 333 of the bracket 30 is perpendicular to the second segment 122b of the second sub-part 122 of the middle plate 10. In this way, when the middle frame 200 falls, the impact force on the frame 20 can be better transmitted to the first part 11 of the middle plate 10 through the bracket 30, thereby preventing the second part 12 of the middle plate 10 from being subjected to a large impact force and collapsing and deforming, which would cause the first part 11 and the second part 12 of the middle plate 10 to separate, thereby improving the structural reliability and drop reliability of the middle frame 200.
[0098] Referring again to Figure 11, the projection of the support portion 32 of the bracket 30 onto the plane of the middle plate 10 can be a first projection. The angle formed by the first projection and the length extension direction of the second sub-part 122 of the middle plate 10 can be a first angle α. The first angle α can be less than 90°. In this case, the angle formed by the first projection and the length extension direction of the first connecting interface 10a of the middle plate 10 can be less than 90°. The angle formed by the first projection and the length extension direction of the second connecting interface 10b of the middle plate 10 can also be less than 90°. It should be noted that the first angle α can be the angle formed by the first projection and the length extension direction of a portion of the second sub-part 122 of the middle plate 10 that is close to the support portion 32 of the bracket 30. In this embodiment, the first angle α can be the angle formed by the first projection and the length extension direction of the first segment 122a of the second sub-part 122.
[0099] For example, the support portion 32 of the bracket 30 can be generally arc-shaped. In this case, the first included angle α can be the angle formed by the tangent at the intersection of the first projection and the length extension direction of the first segment 122a of the second sub-part 122 and the length extension direction of the first segment 122a of the second sub-part 122.
[0100] In some embodiments, the first projection may also be spaced apart from the first sub-part 121 of the second part 12. The first projection does not overlap with the first sub-part 121 of the second part 12. In this way, there is a certain distance between the support part 32 and the first radiator 510, thereby preventing the support part 32 of the bracket 30 from affecting the radiation performance of the antenna radiator 500.
[0101] Figure 14 is a partial cross-sectional structural diagram of one embodiment of the middle frame 200 shown in Figure 3 cut along DD.
[0102] As shown in Figure 14, the middle frame 200 may further include a connector 50. The connector 50 can be connected between the frame 21 of the side frame 20 and the support portion 32 of the bracket 30. That is, the support portion 32 of the bracket 30 can be connected to the frame 21 of the side frame 20 via the connector 50. The connector 50 can be fixedly connected to the frame 21 of the side frame 20, and / or, the connector 50 can be fixedly connected to the support portion 32 of the bracket 30. For example, the elastic modulus of the connector 50 can be less than the elastic modulus of the support portion 32 of the bracket 30. The connector 50 can be a material with a low elastic modulus, such as Mylar or low-modulus adhesive.
[0103] It is understood that in this embodiment, by providing a connector 50 between the frame 20 and the support portion 32, and by using a connector 50 with a small elastic modulus, the connector 50 can absorb assembly tolerances and / or manufacturing tolerances of the bracket 30 that arise during the assembly of the bracket 30 and the frame 20, thereby ensuring surface contact between the support portion 32 and the frame 20. Thus, when the frame 20 is subjected to external force (such as when the middle frame 200 falls), the impact force on the frame 20 can be transmitted to the support portion 32 of the bracket 30 through the connector 50 and evenly distributed across the entire plane of the support portion 32. This results in a more uniform stress distribution on the support portion 32, preventing breakage due to stress concentration and improving the structural reliability and drop resistance of the middle frame 200.
[0104] Figure 15 is a schematic diagram of the enlarged structure of the middle frame 200 at point E shown in Figure 5 in another embodiment. Figure 16 is a schematic diagram of the enlarged structure of the middle frame 200 at point E shown in Figure 5 in another embodiment. It should be noted that, for ease of understanding, the structure of the support 30 is hidden in Figure 15.
[0105] As shown in Figures 15 and 16, the structure of the middle frame 200 in this embodiment is roughly the same as that of the middle frame 200 shown in Figure 3, and the similarities will not be repeated. The main differences between the two are described below. In this embodiment, some heat-generating components of the electronic device 1000 (such as buttons, camera modules, etc.) can be positioned closer to the second long side 217 than the first short side 211, the first long side 213, and the second short side 215 of the frame 20.
[0106] For example, a portion of the second sub-gap 132 may be located between the first connecting portion 221 and the first portion 11 of the middle plate 10, and a portion may also be located between the second connecting portion 222 and the first portion 11 of the middle plate 10. The second sub-gap 132 may communicate with the first sub-gap 131. A portion of the second sub-part 122 of the second portion 12 of the middle plate 10 may also be located between the second connecting portion 222 and the first portion 11 of the middle plate 10. That is, a portion of the second sub-part 122 may also be fixedly connected between the second connecting portion 222 of the frame 20 and the first portion 11 of the middle plate 10.
[0107] For example, the bracket 30 can be fixedly connected to the first part 11 of the middle plate 10 and the second connecting part 222 of the frame 20. In the thickness direction of the middle frame 200 (i.e., the Z-axis direction in this embodiment), the main body 31 of the bracket 30 can be positioned directly opposite the second sub-gap 132 of the middle plate 10, that is, the main body 31 of the bracket 30 can be positioned directly opposite the second sub-part 122 of the middle plate 10. The support part 32 of the bracket 30 can contact the second long side 217 of the frame. In this way, when the middle frame 200 falls, the impact force on the frame 20 can be transmitted sequentially through the support part 32 and the main body 31 of the bracket 30, and finally to the first part 11 of the middle plate 10. At this time, the second part 12, which has weaker tensile strength and yield strength, will not be subjected to the impact force, thereby preventing the second part 12 of the middle plate 10 from collapsing and deforming under the impact force, causing the first part 11 and the second part 12 to separate, which is beneficial to improving the structural reliability and drop reliability of the middle frame 200. At the same time, it can also prevent gaps from appearing between the first part 11 and the second part 12 due to separation, which helps to ensure the airtightness of the middle frame 200.
[0108] In other embodiments, the bracket 30 may not include the support portion 32.
[0109] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.
[0110] It should be noted that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.
[0111] The above are merely some embodiments of this application, and the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A middle frame (200), characterized in that, It includes a middle plate (10), a frame (20) and a bracket (30), wherein the frame (20) surrounds the middle plate (10) and is fixedly connected to the middle plate (10); The middle plate (10) includes a first part (11) and a second part (12), the second part (12) being fixedly connected between the first part (11) and the frame (20), the tensile strength of the first part (11) being greater than the tensile strength of the second part (12), and / or the yield strength of the first part (11) being greater than the yield strength of the second part (12). The bracket (30) includes a main body (31), a support (32), and a fixing part (33). The main body (31) includes a first surface (31a) and a second surface (31b) arranged opposite to each other. The support (32) is fixedly connected to the main body (31) and protrudes relative to the first surface (31a). The fixing part (33) is fixedly connected to the main body (31) and protrudes relative to the second surface (31b). The fixing part (33) is spaced apart from the second part (12). At least part of the fixing part (33) is embedded in the first part (11). The support (32) connects the surface of the frame (20) facing the middle plate (10).
2. The middle frame (200) according to claim 1, characterized in that, The area of the surface of the support part (32) facing away from the main body part (31) is smaller than the area of the surface of the support part (32) facing the main body part (31).
3. The middle frame (200) according to claim 1 or 2, characterized in that, The support portion (32) includes a first part (321) and a second part (322). The first part (321) and the second part (322) of the support portion (32) are stacked together. The second part (322) of the support portion (32) is fixedly connected between the first part (321) of the support portion (32) and the main body portion (31). The area of the second part (322) of the support portion (32) gradually increases in the direction close to the main body portion (31).
4. The middle frame (200) according to any one of claims 1 to 3, characterized in that, The thermal conductivity of the bracket (30) is less than that of the first part (11) of the middle plate (10).
5. The middle frame (200) according to any one of claims 1 to 4, characterized in that, The main body (31), the support (32), and the fixing part (33) are integrally formed.
6. The middle frame (200) according to any one of claims 1 to 5, characterized in that, The middle frame (200) also includes a connector (50), which is sandwiched between the support (32) and the side frame (20).
7. The middle frame (200) according to claim 6, characterized in that, The elastic modulus of the connector (50) is less than that of the support (32).
8. The middle frame (200) according to any one of claims 1 to 7, characterized in that, The middle frame (200) also includes an adhesive layer (40), which is fixedly connected between the middle plate (10) and the main body (31).
9. The middle frame (200) according to any one of claims 1 to 8, characterized in that, The frame (20) includes a frame (21) and a connecting part (22). The connecting part (22) is fixed to the side of the frame (21) facing the middle plate (10). A part of the frame (21) is fixedly connected to the middle plate (10), and another part is fixedly connected to the middle plate (10) through the connecting part (22). A part of the frame (21) constitutes an antenna radiator (500). The second part (12) of the middle plate (10) includes a first sub-part (121) and a second sub-part (122) connected together. The first sub-part (121) is fixedly connected between the antenna radiator (500) and the first part (11) of the middle plate (10), and the second sub-part (122) is fixedly connected between the connecting part (22) and the first part (11) of the middle plate (10). The projection of the bracket (30) onto the plane of the middle plate (10) overlaps with the second sub-part (122).
10. The middle frame (200) according to claim 9, characterized in that, The width of the second sub-part (122) is smaller than the width of the first sub-part (121).
11. The middle frame (200) according to claim 9 or 10, characterized in that, The projection of the support part (32) on the plane where the middle plate (10) is located is spaced apart from the first sub-part (121).
12. The middle frame (200) according to any one of claims 9 to 11, characterized in that, The number of the fixing parts (33) is greater than or equal to 3, and a portion of the plurality of fixing parts (33) is embedded in the first part (11) of the middle plate (10), and another portion is embedded in the connecting part (22).
13. The middle frame (200) according to any one of claims 9 to 12, characterized in that, The second sub-part (122) includes a first segment (122a) and a second segment (122b) connected together, the first segment (122a) and the second segment (122b) being arranged at an angle.
14. The middle frame (200) according to claim 13, characterized in that, The length extension direction of the first segment (122a) is parallel to the length direction of the middle frame (200), and / or the length extension direction of the second segment (122b) is parallel to the width direction of the middle frame (200).
15. The middle frame (200) according to any one of claims 1 to 14, characterized in that, The conductivity of the bracket (30) is greater than that of the second part (12) of the middle plate (10).
16. The middle frame (200) according to any one of claims 1 to 15, characterized in that, The thermal conductivity of the second part (12) of the middle plate (10) is less than that of the first part (11) of the middle plate (10).
17. An electronic device (1000), characterized in that, It includes a screen (100), a back cover (300), and a mid-frame (200) according to any one of claims 1 to 16, wherein the screen (100) and the back cover (300) are fixed to opposite sides of the mid-frame (200).