Middle frame and electronic equipment

Abstract

The utility model provides a middle frame and electronic equipment, relates to the technical field of electronic products, and is used for solving the problem of how to improve the overall strength of the middle frame. Specifically, the middle frame comprises a first side frame, a first middle plate and a first plastic part. The first frame comprises a first frame section, and the first middle plate is located on the inner side of the first frame. The first middle plate comprises a first part, and the first part and the first frame section are spaced to form a first gap; the first part comprises a first surface and a second surface which are opposite to each other, and the first surface and the second surface are arranged along the thickness direction of the middle frame; the first surface is provided with a first concave part which is concave towards the second surface; the first concave part is provided with a first side wall back to the first frame section; the first plastic part is located on the inner side of the first frame and connected between the inner side face of the first frame section and the first part, a part of the first plastic part fills the first gap, and a part of the first plastic part is located in the first concave part and covers the first side wall.

Description

Technical Field

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

[0002] With the advancement of technology, electronic devices have more and more functions, and people use mobile phones, tablet computers and other electronic devices more and more frequently, so the requirements for thinner and lighter electronic devices are also getting higher and higher.

[0003] The middle frame is the supporting skeleton of the electronic device, which is used to install the screen, back cover, speaker module, camera module, etc. In the related art, the middle frame is formed by metal and plastic injection molding, which can not only reduce the weight of the middle frame to achieve the lightness and thinness of the electronic device, but also form a partition area to ensure the reliability of the data signal transmission of the antenna. However, the bonding strength of plastic and metal in the related art is relatively low, which makes the overall strength of the middle frame relatively poor. Utility Model Content

[0004] The embodiments of the present application provide a middle frame and an electronic device, which are used to solve the problem of how to improve the overall strength of the middle frame.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a middle frame, which includes a first frame, a first middle plate and a first plastic part. The first frame includes a first frame segment. The first middle plate is located on the inner side of the first frame; the first middle plate includes a first part, and the first part is spaced apart from the first frame segment to form a first gap; the first part includes a first surface and a second surface opposite to each other, and the first surface and the second surface are arranged along the thickness direction of the middle frame. The first surface has a first recessed portion that is recessed toward the second surface, and the first recessed portion has a first side wall that is opposite to the first frame segment. The first plastic part is located on the inner side of the first frame, and is connected between the inner side surface of the first frame segment and the first part, a part of the first plastic part fills the first gap, and a part of the first plastic part is located in the first recessed portion and covers the first side wall.

[0007] The middle frame provided in the embodiment of the present application can form the first plastic part by injection molding, and by providing a first gap between the first part of the first middle plate and the first frame segment, by connecting the first plastic part between the inner side surface of the first frame segment and the first part of the first middle plate, and filling the first gap, the weight of the middle frame as a whole can be made lighter, which is conducive to achieving the lightness and thinness of the middle frame; by making the first plastic part cover the first side wall of the first recessed part facing away from the first frame segment, the bonding area between the first plastic part and the first part of the first middle plate is larger, which can enhance the bonding strength between the first plastic part and the first middle plate. In addition, the first plastic part covers the first side wall, so that the first side wall provides a blocking force to limit the first plastic part from moving relative to the first middle plate in the direction close to the first frame segment, further enhancing the bonding strength between the first plastic part and the first middle plate, thereby ensuring the overall strength of the middle frame.

[0008] In some possible implementations of the first aspect, the first recessed portion further includes a second side wall, and the second side wall is located on a side of the first side wall that is away from the first frame segment. The first plastic portion also covers the second side wall. In this way, the bonding area between the first plastic portion and the first middle plate is further enhanced, and the bonding strength between the two is increased, thereby ensuring the overall strength of the middle frame, thereby ensuring the overall strength of the electronic device.

[0009] In some possible implementations of the first aspect, the second side wall has a second recessed portion. A portion of the first plastic portion is located in the second recessed portion and also covers the side wall and the bottom wall of the second recessed portion. In this way, the bonding area between the first plastic portion and the first middle plate is further enhanced, and the bonding strength between the two is increased, thereby ensuring the overall strength of the middle frame, thereby ensuring the overall strength of the electronic device.

[0010] In some possible implementations of the first aspect, the first recessed portion passes through the second surface. In this way, by making the first recessed portion pass through the second surface, when the first plastic portion used to cover the first side wall corresponds to a portion of the middle frame at a location away from the first frame segment and is relatively thin, the thickness of the end of the first fixing portion away from the first frame segment in the middle frame thickness direction can be as thick as possible, which can prevent the first fixing portion from being entirely located on the side of the first portion facing away from the second surface, where the thickness of the first fixing portion and the thickness of the first portion are both relatively thin, and the bonding strength of the first fixing portion and the first portion cannot be guaranteed, and the structural strength of the first fixing portion and the first portion cannot be guaranteed. Therefore, this structure can ensure the bonding strength of the first plastic portion and the first middle plate while achieving a thin and light middle frame.

[0011] In some possible implementations of the first aspect, the second recessed portion penetrates the second surface along a thickness direction of the middle frame.

[0012] In some possible implementations of the first aspect, the second recessed portion penetrates the first surface along a thickness direction of the middle frame.

[0013] In this way, the path for water vapor on one side of the first part to penetrate into the other side through the first recessed portion can be increased, thereby ensuring the waterproof performance of the middle frame and further ensuring the waterproof performance of the electronic device using the middle frame.

[0014] In some possible implementations of the first aspect, the second side wall is connected end to end with the first side wall. The second side wall includes a first end and a second end connected to the first side wall. Along the extension track of the second side wall from the first end to the second end, the second recessed portion extends from the first end to the second end. In this way, the path for water vapor on one side of the first part to penetrate into the other side through the first recessed portion can be increased as much as possible, and the waterproof performance of the middle frame can be ensured, thereby ensuring the waterproof performance of the electronic device in the middle frame in the application.

[0015] In some possible implementations of the first aspect, along the direction from the first frame segment to the first recessed portion, the minimum width of the second recessed portion is greater than or equal to 0.3 mm. In this way, the waterproof performance of the middle frame can be ensured as much as possible, thereby ensuring the waterproof performance of the electronic device.

[0016] In some possible implementations of the first aspect, the first side wall has a third recessed portion that is recessed toward the first frame segment, and the third recessed portion does not penetrate the first surface. A portion of the first plastic portion is located in the third recessed portion and covers the bottom wall and side wall of the third recessed portion. In this way, the bonding area between the first plastic portion and the first portion of the first middle plate can be further increased. In addition, the third recessed portion can also provide a blocking force that limits the first plastic portion from moving relative to the first portion in a direction away from the first portion along the thickness direction of the middle frame and the direction from the first frame segment to the first recessed portion, thereby further enhancing the bonding strength between the first plastic portion and the first middle plate, thereby ensuring the overall strength of the middle frame.

[0017] In some possible implementations of the first aspect, the first surface further has a fourth recessed portion, the fourth recessed portion is located between the first recessed portion and the first frame segment, and the fourth recessed portion runs through the first side wall. A portion of the first plastic portion is located in the fourth recessed portion and covers the bottom wall and the side wall of the fourth recessed portion. In this way, the bonding area between the first plastic portion and the first portion of the first middle plate can be further increased, and the bonding strength between the first plastic portion and the first middle plate is further enhanced, thereby ensuring the overall strength of the middle frame.

[0018] In some possible implementations of the first aspect, the first portion includes a first plate portion and a first protrusion portion, the first recess portion is provided in the first plate portion; the first protrusion portion is connected to the surface of the first plate portion facing away from the second surface and is located between the first recess portion and the first frame segment; the first protrusion portion includes a portion extending from the first plate portion in a direction facing away from the second surface, and another portion of the first protrusion portion extends from an end of the portion away from the first plate portion in a direction facing away from the first frame segment. A portion of the first plastic portion is located in a space enclosed by the first protrusion portion and the first plate portion, and covers the first protrusion portion.

[0019] In this way, the bonding area between the first plastic part and the first portion of the first middle plate can be further increased. In addition, the first protrusion can also provide a blocking force to limit the first plastic part from moving relative to the first portion in the direction away from the first portion along the thickness direction of the middle frame and the direction from the first frame segment to the first recessed portion, thereby further enhancing the bonding strength between the first plastic part and the first middle plate, thereby ensuring the overall strength of the middle frame.

[0020] In some possible implementations of the first aspect, the first plastic part includes a filling part and a first fixing part. The filling part fills the first gap. The first fixing part is connected to the filling part and extends from the filling part to the inner side of the first frame, and the first fixing part covers the first side wall. In this way, while the bonding strength between the first plastic part and the first middle plate is enhanced by the connection structure between the first fixing part and the first part, the width of the first fixing part along the extension direction of the first frame segment can be made smaller, providing more installation space for other components (such as a speaker module) installed on the middle frame.

[0021] In some possible implementations of the first aspect, the first portion includes a first plate portion and a first protrusion, the first protrusion is connected to a surface of the first plate portion that is opposite to the second surface, the surface of the first protrusion forms a partial area of ​​the first surface, and at least a portion of the first recess is provided in the first protrusion. In this way, by partially increasing the thickness of the first portion to provide the first recess, the strength of the first middle plate will not be reduced, thereby ensuring the strength of the middle frame.

[0022] In some possible implementations of the first aspect, a surface of the first protruding portion that is away from the first frame segment and connected to the first plate portion is connected to a surface of the first fixing portion that is opposite to the second surface to form a first supporting surface, and the first supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface. In this way, the first mounting surface is tilted relative to the first plate portion, which facilitates matching installation between the first mounting surface and other components (such as a speaker module), and facilitates setting a sealing member between the two for sealing.

[0023] In some possible implementations of the first aspect, the surface area of ​​the first fixing portion that faces away from the second surface and is in contact with the first surface forms a first supporting surface, and the first supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface. In this way, the finished part of the middle frame can be formed by integral injection molding, without the need for cutting after injection molding, which can improve the manufacturing efficiency of the middle frame. In addition, the first mounting surface is inclined relative to the first plate portion, which facilitates the matching installation between the first mounting surface and other components (such as a speaker module), and facilitates the setting of a seal between the two for sealing.

[0024] In some possible implementations of the first aspect, the first plastic portion further includes a second fixing portion, the second fixing portion is connected to the filling portion and extends from the filling portion to the inner side of the first frame, the second fixing portion and the first fixing portion are spaced apart along the extension direction of the first frame segment, and the second fixing portion is connected to the first portion. A surface of the second fixing portion facing away from the second surface forms at least a portion of a second supporting surface, and the second supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface.

[0025] In this way, the first plastic part can be connected to the first portion of the first middle plate through a plurality of fixing parts, thereby further enhancing the bonding strength between the first plastic part and the first middle plate to ensure the overall strength of the middle frame.

[0026] In some possible implementations of the first aspect, the first plastic part also includes a second fixing part, which is connected to the filling part and extends from the filling part to the inner side of the first frame, and the second fixing part and the first fixing part are spaced apart along the extension direction of the first frame segment, and the second fixing part is connected to the first part.

[0027] In some possible implementations of the first aspect, the first surface is further provided with at least one second protrusion, the at least one second protrusion is located between the first fixing portion and the second fixing portion, and between an end of the first fixing portion away from the first frame segment and the first frame segment. The first plastic portion further includes a third fixing portion, the third fixing portion extends from the filling portion to the inner side of the first frame and covers the at least one second protrusion.

[0028] In some possible implementations of the first aspect, the first portion further has a plurality of first through holes, the plurality of first through holes penetrate the first portion along the thickness direction of the middle frame and are located between the first fixing portion and the second fixing portion, and the plurality of first through holes are located between an end of the first fixing portion away from the first frame segment and the first frame segment. The first plastic portion further includes a third fixing portion, the third fixing portion extends from the filling portion to the inner side of the first frame and fills the plurality of first through holes.

[0029] In some possible implementations of the first aspect, the first surface is further provided with at least one second protrusion, the at least one second protrusion is located between the first fixing portion and the second fixing portion, and between an end of the first fixing portion away from the first frame segment and the first frame segment. The first plastic portion further includes a third fixing portion, the third fixing portion extends from the filling portion to the inner side of the first frame and covers the at least one second protrusion.

[0030] The first part also has a plurality of first through holes, which penetrate the first part along the thickness direction of the middle frame and are located between the first fixing part and the second fixing part, and the plurality of first through holes are located between an end of the first fixing part away from the first frame segment and the first frame segment. The first plastic part also includes a third fixing part, which extends from the filling part to the inner side of the first frame and fills the plurality of first through holes.

[0031] In this way, the bonding area between the first plastic part and the first middle plate can be further increased, and the second protrusion and the first through hole can provide a blocking force to limit the movement of the first plastic part relative to the first part toward the direction close to the first frame segment. Therefore, the bonding strength between the first plastic part and the first middle plate is further enhanced, ensuring the overall strength of the middle frame.

[0032] In some possible implementations of the first aspect, the first frame segment has a first sound outlet hole, and the first sound outlet hole passes through the outer side surface and the inner side surface of the first frame segment. The first plastic portion has a first sound outlet channel, and the first sound outlet channel passes through the surface of the first plastic portion facing away from the first frame segment and is connected to the first sound outlet hole, and part of the inner wall surface of the first sound outlet channel is formed on the first fixing portion.

[0033] In this way, the bonding strength between the first part of the first middle plate for mounting the speaker module and the first plastic part can be increased, and while the first part is thinner to make the electronic device lighter and thinner as a whole, the overall strength of the middle frame can be ensured.

[0034] In some possible implementations of the first aspect, the first portion is provided with a first mounting hole, the first mounting hole being located on a side of the first recessed portion away from the first frame segment. The first mounting hole runs through the first surface and the second surface. The first mounting hole is used to accommodate a portion of the speaker module.

[0035] In this way, the speaker module of the electronic device in the application frame can be installed at the first installation hole, and a part of the speaker module is located in the first installation hole, which can reduce the overall thickness of the electronic device to achieve a thin and light electronic device. In addition, the first installation hole is located on the side of the first fixing portion away from the first frame segment, so that the first installation hole and the first recessed portion are staggered, which can ensure the strength of the first middle plate as much as possible, and then ensure the strength of the entire middle frame.

[0036] In some possible implementations of the first aspect, the first frame segment is a metal structure, the first frame segment has at least one gap so that the first frame segment forms a plurality of antenna radiators spaced apart from each other, and at least one gap is connected to the first gap. The middle frame further includes at least one second plastic part, and one second plastic part is connected to the first plastic part and fills one gap.

[0037] In this way, a portion or multiple portions of the first frame segment can form an antenna radiator, and there is no need to design and install an additional antenna radiator, which simplifies the structure of the electronic device. In addition, the first plastic portion is an insulating structure, which can make the antenna radiator have a larger clearance height, ensuring the reliability of the electronic device in sending and receiving wireless signals.

[0038] In a second aspect, an embodiment of the present application provides an electronic device, the electronic device comprising a middle frame, a screen, and a first back cover. The first middle frame is the middle frame described in any of the above implementations. At least a portion of the screen is stacked with the first middle plate and is located on one side of the first middle plate, and at least a portion of the screen is fixed to the first middle frame. The first back cover is stacked with the first middle plate and is located on the side of the first middle plate facing away from the screen, and the first back cover is fixed to the first middle frame.

[0039] In a third aspect, an embodiment of the present application provides an electronic device, which includes a first middle frame, a screen, a first back cover, and a speaker module. The first middle frame is a middle frame in which the first frame segment has a first sound outlet in the above-mentioned implementation. At least a portion of the screen is stacked with the first middle plate and is located on one side of the first middle plate, and at least a portion of the screen is fixed to the first middle frame. The first back cover is stacked with the first middle plate and is located on the side of the first middle plate facing away from the screen, and the first back cover is fixed to the first middle frame. The speaker module is arranged on the first middle plate and is located between the first middle plate and the first back cover, and the sound outlet of the speaker module is connected to the first sound outlet channel.

[0040] Since the electronic device provided in the embodiment of the present application includes the middle frame as described in the above implementation method, the two can solve the same problem and achieve the same effect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A three-dimensional diagram of an electronic device in an unfolded state provided by some embodiments of the present application;

[0042] Figure 2 for Figure 1 A schematic diagram of a partial exploded structure of the electronic device shown;

[0043] Figure 3 for Figure 1 A schematic diagram of the structure of the electronic device shown in the folded state;

[0044] Figure 4for Figure 2 A schematic structural diagram of a first middle frame of the electronic device shown;

[0045] Figure 5 for Figure 4 A schematic diagram of the exploded structure of the first middle frame shown;

[0046] Figure 6 for Figure 5 A partial structural schematic diagram of the first middle frame shown;

[0047] Figure 7 for Figure 4 The schematic diagram of the cross-sectional structure of the first middle frame at line AA is shown;

[0048] Figure 8 for Figure 2 A schematic diagram of the assembly structure of another structure of the first middle frame of the electronic device and the speaker module;

[0049] Fig. 9 for Figure 8 A schematic structural diagram of a first middle frame of the assembly structure shown;

[0050] Fig.10 for Fig. 9 A schematic diagram of the exploded structure of the first middle frame shown;

[0051] Fig.11 for Fig.10 The enlarged view of point B in the middle;

[0052] Fig.12 for Fig. 9 The cross-sectional structure diagram of the first middle frame at the CC line is shown;

[0053] Fig.13 for Figure 8 An exploded structural diagram of a portion of the structure of the assembly shown;

[0054] Fig.14 for Fig.13 A schematic diagram of the structure of the mounting frame of the speaker module shown;

[0055] Fig.15 for Figure 8 The cross-sectional structure diagram of the assembly structure shown at line DD;

[0056] Fig.16 for Figure 2 A schematic diagram of another partial structure of the first middle frame of the electronic device shown;

[0057] Fig.17 for Fig.16 A schematic diagram of the exploded structure of the first middle frame shown;

[0058] Fig.18 for Fig.16 The cross-sectional structure diagram of the first middle frame at line EE is shown;

[0059] Fig.19 for Fig.16 The structure diagram of the first middle frame shown is when viewed from another viewing angle.

[0060] Reference numerals:

[0061] 100- electronic equipment;

[0062] 10-folding screen; 11-first screen part; 12-second screen part; 13-third screen part;

[0063] 20-support device; 21-first shell; 211-first middle frame; 211a-first surface; 211a1-first supporting surface; 211a2-second supporting surface; 211a3-third supporting surface; 211b-second surface; 2111-first frame; 2111a-first gap; 21111-first frame segment; 21111a-first end surface; 21111b-second end surface; 21111c-gap; 21112-second frame segment; 21113-third frame segment; 2111b-first sound outlet; 2112-first middle plate; 2112a-first recessed portion; 2112d-first through hole; 2112a1-first side wall; 2112a2-second side wall; 2112a3-first end; 2112a4-second end; 2 112b-third concave portion; 2112c-second concave portion; 2112e-fourth concave portion; 21121-first part; 21121a-first surface; 21121b-second surface; 211211-first plate portion; 211212-first protrusion; 211213-second protrusion; 21122-second part; 2113-plastic portion; 21131-first plastic portion; 21131a-first sound outlet channel; 211311-filling portion; 211312-first fixing portion; 211313-second fixing portion; 211314-third fixing portion; 212-first back cover; 22-second shell; 221-second middle frame; 2211-second frame; 2212-second middle plate; 222-second back cover; 23-rotating shaft mechanism;

[0064] 30-speaker module; 31-mounting frame; 311-fixing portion; 3111-first mounting groove; 312-matching portion; 312a-matching surface; 312b-first matching area; 312c-second matching area; 312d-third matching area; 3121-fifth recessed portion; 32-sounding device; 33-protective film;

[0065] 40 - sealing member; 41 - second through hole; 42 - third through hole. DETAILED DESCRIPTION

[0066] In the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. 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.

[0067] In the embodiments of the present application, it should be understood that the directional terms mentioned, such as "up", "down", "left", "right", "inside", "outside", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0068] In the embodiments of the present application, the terms "first", "second", "third", "fourth", "fifth", and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", and "sixth" may explicitly or implicitly include one or more of the features.

[0069] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0070] In the embodiments of the present application, "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0071] In the embodiments of the present application, it should be noted that the descriptions "vertical" and "parallel" respectively represent approximately vertical and approximately parallel within a certain error range, and the error range may be a range in which the deviation angle is less than or equal to 5°, 8° or 10° relative to absolute vertical and absolute parallel, respectively, and no specific limitation is made here.

[0072] The present application provides an electronic device, which includes but is not limited to a mobile phone, a tablet computer (tablet personal computer), a personal digital assistant (PDA), a handheld device with a wireless communication function, a computing device, a vehicle-mounted device, a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self driving), a wireless terminal in remote medical care (remote medical care), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in a smart city (smart city), a wireless terminal in a smart home (smart home) and other mobile terminals or fixed terminals.

[0073] The present application is exemplified by taking the electronic device as a handheld device with wireless communication function, the handheld device may be, for example, a mobile phone, and the mobile phone may be, for example, a folding screen mobile phone.

[0074] See also Figure 1 and Figure 2 , Figure 1 A three-dimensional diagram of an electronic device 100 in an unfolded state provided in some embodiments of the present application, Figure 2 for Figure 1 A schematic diagram of a partial exploded structure of the electronic device 100 shown. The electronic device 100 is approximately in the shape of a rectangular flat plate in the unfolded state. In order to facilitate the description of the embodiments below, an XYZ coordinate system is established for the electronic device 100 in the unfolded state, and the length direction of the electronic device 100 is defined as the X-axis direction, the width direction of the electronic device 100 is defined as the Y-axis direction, and the thickness direction of the electronic device 100 is defined as the Z-axis direction. It can be understood that the coordinate system setting of the electronic device 100 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the electronic device 100 can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc.

[0075] The electronic device 100 includes a folding screen 10 and a supporting device 20 .

[0076] The foldable screen 10 is a screen of the electronic device 100, and is used to display information such as images and videos. The foldable screen 10 can be an organic light-emitting diode (OLED) screen, a micro organic light-emitting diode (micro organic light-emitting diode) screen, a quantum dot light emitting diode (QLED) screen, a liquid crystal display (LCD), and the like.

[0077] The folding screen 10 has a display area for displaying image information, and the display area of ​​the folding screen 10 is exposed to present images, videos and other information to the user. The folding screen 10 includes a first screen portion 11, a second screen portion 12 and a third screen portion 13 connected in sequence, that is, the second screen portion 12 is connected between the first screen portion 11 and the third screen portion 13. Figure 1 and Figure 2 In the illustrated embodiment, the folding screen 10 is in the unfolded state, and the first screen portion 11, the second screen portion 12, and the third screen portion 13 are arranged in sequence along the X-axis direction, so that the electronic device 100 is folded in the horizontal direction, that is, the folding axis of the folding screen 10 is parallel to the Y-axis direction. In some other embodiments, when the folding screen 10 is in the unfolded state, the first screen portion 11, the second screen portion 12, and the third screen portion 13 may also be arranged in sequence along the Y-axis direction. In this way, the electronic device 100 is folded in the longitudinal direction, that is, the folding axis of the folding screen 10 is parallel to the X-axis direction. When the folding screen 10 is in the unfolded state, a large-screen display can be achieved to provide users with richer information and bring users a better user experience.

[0078] At least the second screen portion 12 of the folding screen 10 is a flexible screen structure. In this way, the second screen portion 12 can be bent and deformed after being subjected to external force, so that the folding screen 10 is Figure 1 The first screen portion 11 and the third screen portion 13 of the folding screen 10 can be a flexible screen structure, or a hard screen structure, or partly a flexible screen structure and partly a hard screen structure, which is not specifically limited here.

[0079] See also Figure 3 , Figure 3 for Figure 1The schematic diagram of the structure of the electronic device 100 shown is in a folded state, and the folding screen 10 in the electronic device 100 is also in a folded state. Specifically, when the folding screen 10 is in a folded state, the first screen portion 11 and the third screen portion 13 of the folding screen 10 are approximately parallel and opposite. It should be noted that the angle between the first screen portion 11 and the third screen portion 13 is within 30°, and the first screen portion 11 and the third screen portion 13 can be considered to be approximately parallel. The first screen portion 11 and the third screen portion 13 are opposite to each other means that the display surface of the first screen portion 11 and the display surface of the third screen portion 13 face each other.

[0080] Please continue reading Figure 3 , the support device 20 is used to carry the folding screen 10. When the electronic device 100 is in the folded state, the support device 20 is protected outside the folding screen 10, and the folding screen 10 is not visible to the user, that is, the electronic device 100 is an inner-folding electronic device, which can prevent the folding screen 10 from being scratched by hard objects. In some other embodiments, when the electronic device 100 is in the folded state, the folding screen 10 can also be located outside the support device 20, and the folding screen 10 is visible to the user, that is, the electronic device 100 is an outer-folding electronic device, and the display of videos and images can be realized in the folded state.

[0081] The support device 20 includes a first housing 21, a second housing 22, and a hinge mechanism 23. The first housing 21 carries the first screen portion 11, and the second housing 22 carries the third screen portion 13. The hinge mechanism 23 is connected between the first housing 21 and the second housing 22, and carries the second screen portion 12, that is, the second screen portion 12 of the folding screen 10 is supported on the hinge mechanism 23. The hinge mechanism 23 is used to realize the rotation between the second housing 22 and the first housing 21, so as to support the folding of the folding screen 10 between the unfolded state and the folded state.

[0082] Please return to Figure 2 , the first shell 21 may include a first middle frame 211 and a first back cover 212. The first middle frame 211 may include a first frame 2111 and a first middle plate 2112, and the first frame 2111 is arranged around the outer peripheral edge of the first middle plate 2112, that is, the first middle plate 2112 is located on the inner side of the first frame 2111. Based on this, the first screen portion 11 of the folding screen 10 can be adhesively fixed to the first middle plate 2112, that is, the first screen portion 11 is fixed to the first shell 21, that is, at least a portion of the screen is stacked with the first middle plate 2112 and is located on one side of the first middle plate 2112, and at least a portion of the screen is fixed to the first middle frame 211.

[0083] The first back cover 212 is located on the side of the first middle plate 2112 facing away from the first screen portion 11, the first back cover 212 is fixed to the first frame 2111, and can be replaced by a display screen (such as an LCD display screen), that is, the first back cover 212 and the first middle plate 2112 are stacked and located on the side of the first middle plate 2112 facing away from the screen, and the first back cover 212 is fixed to the first middle frame 211. In some examples, the first back cover 212 can be fixed to the first frame 2111 by bonding, snapping, etc. In other examples, the first back cover 212 can also be an integrally formed structure with the first frame 2111, that is, the first back cover 212 and the first frame 2111 are a structural component as a whole. The first back cover 212, the first frame 2111, and the first middle plate 2112 surround a first accommodating cavity. On this basis, the first shell 21 can be connected to the hinge mechanism 23 with the help of the first middle frame 211.

[0084] Please continue reading Figure 2 , the second shell 22 may include a second middle frame 221 and a second back cover 222. The second middle frame 221 may include a second frame 2211 and a second middle plate 2212. The second frame 2211 is arranged around the outer peripheral edge of the second middle plate 2212, that is, the second middle plate 2212 is located on the inner side of the second frame 2211. Based on this, the third screen portion 13 of the folding screen 10 can be adhesively fixed to the second middle plate 2212, that is, the third screen portion 13 is fixed to the second shell 22, that is, at least a part of the screen is stacked with the second middle plate 2212 and is located on one side of the second middle plate 2212, and at least a part of the screen is fixed to the second middle frame 221. The hinge mechanism 23 can be connected between the first middle frame 211 and the second middle frame 221.

[0085] The second back cover 222 is located on the side of the second middle plate 2212 facing away from the third screen portion 13. The second back cover 222 is fixed to the second frame 2211 and can be replaced by a display screen (such as an LCD display screen). In some examples, the second back cover 222 can be fixed to the second frame 2211 by bonding, snapping, etc. In other examples, the second back cover 222 can also be an integrally formed structure with the second frame 2211, that is, the second back cover 222 and the second frame 2211 are a structural component as a whole. The second back cover 222, the second frame 2211, and the second middle plate 2212 enclose a second accommodating cavity. The second accommodating cavity and the aforementioned first accommodating cavity are used to accommodate electronic components such as the main circuit board, the auxiliary circuit board, the speaker module, the camera module, and the battery.

[0086] See also Figure 2 , Figure 4 and Figure 5 , Figure 4 for Figure 2 A structural schematic diagram of the first middle frame 211 of the electronic device 100 is shown. Figure 5for Figure 4 Schematic diagram of the decomposed structure of the first middle frame 211 shown. The first middle frame 211 includes a first frame 2111, a first middle plate 2112 and a plastic part 2113. The first frame 2111 and the first middle plate 2112 can both be metal structural parts. For example, the first frame 2111 and the first middle plate 2112 can both be aluminum structural parts or aluminum alloy structural parts or magnesium structural parts or magnesium alloy structural parts or stainless steel structural parts. In this way, the first frame 2111 and the first middle plate 2112 have higher strength and toughness and better aesthetics, so that the first middle frame 211 has better strength and toughness and better aesthetics. In addition, the first middle plate 2112 has better thermal conductivity, which is beneficial to the heat dissipation of the electronic device 100. In some other embodiments, the first frame 2111 can also be a ceramic structural part.

[0087] The first frame 2111 includes a first frame segment 21111 , a second frame segment 21112 and a third frame segment 21113 . Figure 4 In the illustrated embodiment, the extension direction of the first frame segment 21111 and the extension direction of the third frame segment 21113 are both parallel to the X-axis direction, the extension direction of the second frame segment 21112 is parallel to the Y-axis direction, and the first frame segment 21111, the second frame segment 21112 and the third frame segment 21113 are sequentially connected. In some other embodiments, the first frame segment 21111 may also be parallel to the Y-axis direction, and the second frame segment 21112 and the third frame segment 21113 may be parallel to the X-axis direction, and the present application does not limit this.

[0088] See also Figure 6 and Figure 7 , Figure 6 for Figure 5 The schematic diagram of a part of the structure of the first middle frame 211 is shown, Figure 7 for Figure 4 The schematic diagram of the cross-sectional structure of the first middle frame 211 at the AA line is shown. The first middle frame 211 has a first surface 211a and a second surface 211b opposite to each other, and the first surface 211a and the second surface 211b are arranged along the thickness direction (Z-axis direction) of the first middle frame 211. Among them, the aforementioned first back cover is fixed to the first surface 211a, and the first screen portion of the folding screen 10 is fixed to the second surface 211b. The first frame segment 21111 has a first end face 21111a and a second end face (not shown in the figure) opposite to each other, and the first end face 21111a forms a partial area of ​​the first surface 211a, and the second end face forms a partial area of ​​the second surface 211b.

[0089] Please continue reading Figure 6 and Figure 7, the first middle plate 2112 includes a first portion 21121 and a second portion 21122 arranged and connected along the extension direction of the first frame segment 21111, the first portion 21121 and the first frame segment 21111 are spaced apart from each other to form a first gap 2111a, and the second portion 21122 is connected to the first frame segment 21111. In some examples, the first frame segment 21111 and the first middle plate 2112 can be connected by means of snap connection, bonding, etc. In other examples, the first frame segment 21111 and the first middle plate 2112 can also be an integrally formed structure, that is, the portion where the first frame segment 21111 and the first middle plate 2112 are connected is a structural component as a whole with the first middle plate 2112. The first portion 21121 has a first surface 21121a and a second surface 21121b opposite to each other. The first surface 21121a is opposite to the second surface 211b, and the second surface 21121b is opposite to the first surface 211a. The second surface 21121b forms a partial area of ​​the second surface 211b.

[0090] In some other embodiments, the end of the first middle plate 2112 facing the first frame segment 21111 further includes a third portion (not shown in the figure), the third portion and the first portion 21121 are respectively located on both sides of the second portion 21122 along the X-axis direction and are both connected to the second portion 21122, and the third portion and the first frame segment 21111 are spaced apart from each other to form a second gap (not shown in the figure). In some other embodiments, the end of the first middle plate 2112 facing the first frame segment 21111 may also not include the second portion 21122, that is, the end of the first middle plate 2112 facing the first frame segment 21111 is spaced apart from the first frame segment 21111.

[0091] On the basis of the above, the plastic part 2113 may include a first plastic part 21131. The first plastic part 21131 is located on the inner side of the first frame 2111 and may be connected between the inner side of the first frame segment 21111 and the first part 21121 of the first middle plate 2112 by injection molding. Figure 6 and Figure 7, the first surface 21121a has a first recessed portion 2112a facing the second surface 21121b to form a glue pulling structure, the first recessed portion 2112a penetrates the side of the first part 21121 facing the first frame segment 21111 along the Y-axis direction, and the first recessed portion 2112a can penetrate the second surface 21121b along the thickness direction (Z-axis direction) of the first middle frame 211, or it can not penetrate the second surface 21121b. Based on this, the first plastic part 21131 fills the first gap 2111a and the first recessed portion 2112a, and covers the bottom wall and side wall of the first recessed portion 2112a. In this way, the bonding area between the first plastic part 21131 and the first middle plate 2112 can be increased, and the bonding strength between the first plastic part 21131 and the first middle plate 2112 can be ensured.

[0092] In some examples, the thickness of the first middle frame 211 at the first recess 2112a along the Z-axis direction may be 0.4 mm; wherein, the thickness of the first plastic portion 21131 filled in the first recess 2112a may be 0.1 mm, and the thickness of the first portion 21121 of the first middle plate 2112 at the first recess 2112a may be 0.3 mm; or, the thickness of the first plastic portion 21131 filled in the first recess 2112a may be 0.2 mm, and the thickness of the first portion 21121 of the first middle plate 2112 is 0.2 mm.

[0093] However, the combination formed by the first plastic part 21131 filling the first recessed part 2112a cannot provide a blocking force other than the interface bonding force, so as to limit the first plastic part 21131 from moving relative to the first middle plate 2112 in a direction close to the first frame segment 21111 when the electronic device 100 is impacted. In addition, when the thickness of the first middle frame 211 at the first recessed part 2112a is relatively thin (e.g., the thickness of the first middle frame 211 is greater than or equal to 0.25 mm and less than or equal to 0.3 mm) to make the electronic device 100 lighter and thinner, the portion of the first plastic part 21131 filling the first recessed part 2112a and the corresponding portion of the first middle plate 2112 are both relatively thin, so the structural strength of the first plastic part 21131 and the first part 21121 are both relatively weak, and the bonding strength between the two is also relatively weak, which leads to the overall weak strength of the first middle frame 211.

[0094] To solve the above problems, see Figure 8-Figure 10 , Figure 8 for Figure 2 A schematic diagram of an assembly structure of another structure of the first middle frame 211 of the electronic device 100 and the speaker module 30 is shown. Fig. 9 for Figure 8 The structural diagram of the first middle frame 211 of the assembly structure shown in FIG. Fig.10 for Fig. 9The first middle frame 211 is a schematic diagram of an exploded structure of the first middle frame 211. The first middle frame 211 includes a first frame 2111, a first middle plate 2112 and a plastic part 2113.

[0095] See also Figure 10-12 , Fig.11 for Fig.10 The enlarged view of point B in the middle. Fig.12 for Fig. 9 The cross-sectional structure diagram of the first middle frame 211 at the CC line is shown. The first part 21121 includes a first plate portion 211211 and a first protrusion 211212. The first protrusion 211212 is connected to the surface of the first plate portion 211211 facing away from the second surface 211b. The surface of the first protrusion 211212 forms a partial area of ​​the first surface 21121a. The area of ​​the surface of the first plate portion 211211 facing away from the second surface 211b where the first protrusion 211212 is not provided forms a partial area of ​​the first surface 21121a. The surface of the first protrusion 211212 has a first recessed portion 2112a that is recessed toward the second surface 211b, that is, at least a portion of the first recessed portion 2112a is opened in the first protrusion 211212. Fig.11 In the illustrated embodiment, a portion of the first recessed portion 2112a is disposed on the first raised portion 211212, and another portion is disposed on the first plate portion 211211. In other embodiments, the first recessed portion 2112a may also be entirely disposed on the first raised portion 211212.

[0096] Please continue reading Fig.11 and Fig.12 The first recessed portion 2112a has a first side wall 2112a1, a second side wall 2112a2 and a first bottom wall 2112a3. The first side wall 2112a1 is opposite to the first frame segment 21111, the second side wall 2112a2 is located on the side of the first side wall 2112a1 opposite to the first frame segment 21111, the second side wall 2112a2 is connected to the first side wall 2112a1, and the first side wall 2112a1 and the second side wall 2112a2 are both connected to the first bottom wall 2112a3. Fig.11 and Fig.12In the illustrated embodiment, the first recessed portion 2112a penetrates one side surface of the first protruding portion 211212 along the X-axis direction, that is, a portion of the second side wall 2112a2 faces the first frame segment 21111. In some other embodiments, the first recessed portion 2112a may also penetrate the other side surface of the first protruding portion 211212 along the X-axis direction, that is, the second side wall 2112a2 faces the first frame segment 21111. In some other embodiments, at least one of the first side wall 2112a1 and the second side wall 2112a2 of the first recessed portion 2112a is a non-planar surface, and the two may be connected end to end to form a continuous closed side wall surface surrounding the first bottom wall 2112a3. In some other embodiments, the first recessed portion 2112a may not include the second side wall 2112a2, that is, the first recessed portion 2112a may also penetrate the surface of the first protruding portion 211212 along the Y-axis direction.

[0097] Please continue reading Figure 10-12 The first plastic part 21131 includes a filling part 211311, a first fixing part 211312, a second fixing part 211313 and a third fixing part 211314. The filling part 211311 fills the first gap 2111a and covers the side of the first part 21121 facing the first frame segment 21111 and the inner side of the first frame segment 21111. The first fixing part 211312 is connected to the filling part 211311 and extends from the filling part 211311 to the inner side of the first frame 2111. The first fixing part 211312 fills the first recessed part 2112a and covers the first side wall 2112a1, the second side wall 2112a2 and the first bottom wall 2112a3 of the first recessed part 2112a. The first fixing part 211312 also covers the first surface area between the first recessed part 2112a and the first gap 2111a.

[0098] In this way, the first plastic part 2113 can be formed by injection molding. By connecting the first plastic part 21131 between the inner side surface of the first frame segment 21111 and the first part 21121 of the first middle plate 2112 and filling the first gap 2111a, the overall weight of the first middle frame 2111 can be made lighter, which is conducive to realizing the thinness of the electronic device 100. By making the first plastic part 21131 cover the first side wall 2112a1 of the first recessed part 2112a facing away from the first frame segment 21111 and the second side wall 2112a2 of the first recessed part 2112a, the bonding area between the first plastic part 21131 and the first part 21121 of the first middle plate 2112 is larger, which can enhance the bonding strength between the first plastic part 21131 and the first middle plate 2112. In addition, the first plastic part 21131 covers the first side wall 2112a1, so that the first side wall 2112a1 can provide a blocking force to limit the first plastic part 21131 from moving relative to the first middle plate 2112 toward the first frame segment 21111, further enhancing the bonding strength between the first plastic part 21131 and the first middle plate 2112, thereby ensuring the overall strength of the first middle frame 211, thereby ensuring the overall strength of the electronic device 100.

[0099] In addition, by opening the first recessed portion 2112a on the first raised portion 211212, the strength of the first portion 21121 of the first middle plate 2112 is less affected, thereby ensuring the strength of the first middle frame 211.

[0100] On the basis of the above, please continue to refer to Fig.11 and Fig.12 A third recessed portion 2112b recessed toward the first frame segment 21111 is provided on the first side wall 2112a1 of the first recessed portion 2112a, and the third recessed portion 2112b does not penetrate the first surface 21121a, and the first fixing portion 211312 of the first plastic portion 21131 also covers the bottom wall and side wall of the third recessed portion 2112b, that is, the first plastic portion 21131 also fills the third recessed portion 2112b and covers the bottom wall and side wall of the third recessed portion 2112b. In this way, the bonding area between the first plastic part 21131 and the first part 21121 of the first middle plate 2112 can be further increased. At the same time, the third recessed portion 2112b can also provide a blocking force to limit the first plastic part 21131 from moving relative to the first part 21121 along the Z-axis direction in a direction away from the first part 21121, thereby further enhancing the bonding strength between the first plastic part 21131 and the first middle plate 2112, thereby ensuring the overall strength of the first middle frame 211.

[0101] Please return to Fig.10The second fixing portion 211313 is connected to the filling portion 211311 and extends from the filling portion 211311 to the inner side of the first frame 2111. The second fixing portion 211313 and the first fixing portion 211312 are arranged at intervals along the extension direction (X-axis direction) of the first frame segment 21111. The second fixing portion 211313 is connected to the first portion 21121 of the first middle plate 2112. Specifically, the method of connecting the second fixing portion 211313 to the first portion 21121 can refer to Fig.12 The manner in which the first fixing portion 211312 is connected to the first portion 21121 in the illustrated embodiment. In some other embodiments, the manner in which the second fixing portion 211313 is connected to the first portion 21121 can refer to Figure 6 and Figure 7 The first fixing portion 211312 is connected to the first portion 21121 in the illustrated embodiment. In this way, the first plastic portion 21131 can be connected to the first portion 21121 of the first middle plate 2112 through multiple fixing portions, further enhancing the bonding strength between the first plastic portion 21131 and the first middle plate 2112 to ensure the overall strength of the first middle frame 211. In other embodiments, the plastic portion 21131 may not include the second fixing portion 211313.

[0102] On the basis of the above, please continue to refer to Fig.10 and Fig.11 , the first surface 21121a of the first middle plate 2112 is also provided with a plurality of second protrusions 211213. The plurality of second protrusions 211213 are located between the first fixing portion 211312 and the second fixing portion 211313, and are located between the end of the first fixing portion 211312 away from the first frame segment 21111 and the first frame segment 21111. The plurality of second protrusions 211213 are provided on the first plate portion 211211 and are arranged at intervals along the X-axis direction, and the side of the second protrusion 211213 facing the first frame segment 21111 can be flush with the side of the first plate portion 211211 facing the first frame segment 21111. Based on this, the third fixing portion 211314 extends from the filling portion 211311 to the inner side of the first frame 2111 and covers the plurality of second protrusions 211213. In some other embodiments, the number of the second protrusion 211213 may be one, one second protrusion 211213 extends along the X-axis direction, and the length of the second protrusion 211213 may be greater than or equal to 1 / 2 of the distance between the first fixing portion 211312 and the second fixing portion 211313.

[0103] Please continue reading Fig.10 and Fig.11The first portion 21121 of the first middle plate 2112 is also provided with a plurality of first through holes 2112d, which penetrate the first portion 21121 along the thickness direction of the first middle frame 211 and are located between the first fixing portion 211312 and the second fixing portion 211313; the plurality of first through holes 2112d are located between the end of the first fixing portion 211312 away from the first frame segment 21111 and the first frame segment 21111. The plurality of first through holes 2112d are arranged at intervals along the X-axis direction. The plurality of first through holes 2112d can be provided in the first bottom wall 2112a3 of the first recessed portion 2112a, or in an area outside the first recessed portion 2112a, which is not limited in the present application. The plurality of first through holes 2112d are located on a side of the second protruding portion 211213 away from the first frame segment 21111, so that the thickness of the first portion 21121 between the first through holes 2112d and the first frame segment 21111 is relatively thick, thereby ensuring the strength of the first middle plate 2112. Based on this, the third fixing portion 211314 also fills the plurality of first through holes 2112d.

[0104] In this way, the bonding area between the first plastic part 21131 and the first middle plate 2112 can be made larger, and the second protrusion 211213 and the first through hole 2112d can provide a blocking force to limit the first plastic part 21131 from moving relative to the first part 21121 toward the first frame segment 21111, thereby further enhancing the bonding strength between the first plastic part 21131 and the first middle plate 2112 and ensuring the overall strength of the first middle frame 211. In addition, the second protrusion 211213 is located between the end of the first fixing part 211312 away from the first frame segment 21111 and the first frame segment 21111, which can enhance the bonding strength between the first plastic part 21131 and the first middle plate 2112 while reserving more installation space for other components (such as the speaker module).

[0105] In some other embodiments, the first middle plate 2112 may not have the second protrusion 211213. In some other embodiments, the first middle plate 2112 may not have the first through hole 2112d. In some other embodiments, the first middle plate 2112 may not have the second protrusion 211213 and the first through hole 2112d, and the third fixing portion 211314 directly covers the edge area of ​​the first surface 21121a of the first plate portion 211211. In some other embodiments, the plastic portion 21131 may not include the third fixing portion 211314.

[0106] On the basis of the above, please continue to refer to Fig.10 and Fig.11The first frame segment 21111 has a first sound outlet hole 2111b, and the first sound outlet hole 2111b runs through the outer side surface and the inner side surface of the first frame segment 21111. Fig.11 In the illustrated embodiment, the number of the first sound outlet holes 2111b is multiple and spaced apart along the X-axis direction, which facilitates the sound of the speaker module in the electronic device 100 to be transmitted from the first sound outlet hole 2111b to the outside of the electronic device 100. At the same time, the inner diameter of the first sound outlet hole 2111b can be small, which can prevent dust outside the electronic device 100 from entering the inside of the electronic device 100. Based on this, the first plastic part 21131 has a first sound outlet channel 21131a. The first sound outlet channel 21131a penetrates the surface of the first plastic part 21131 that is opposite to the first frame segment 21111 along the arrangement direction from the outer side surface to the inner side surface of the first frame segment 21111 (Y-axis direction). Specifically, the first sound outlet channel 21131a penetrates the surface of the third fixing part 211314 that is opposite to the first frame segment 21111. The surface of the first fixing part 211312 facing the second fixing part 211313 and the surface of the second fixing part 211313 facing the first fixing part 211312 form a portion of the inner wall surface of the first sound outlet channel 21131a, that is, a portion of the inner wall surface of the first sound outlet channel 21131a is formed on the first fixing part 211312 and / or the second fixing part 211313.

[0107] On this basis, please refer back to Figure 8 The electronic device 100 further includes a speaker module 30, which is used to restore audio electrical signals such as music and voice into sound, and can support the function of external audio. The speaker module 30 is installed and fixed to the first middle frame 211. Figure 8 In the illustrated embodiment, there are two speaker modules 30 , which are respectively mounted and fixed at two ends of the first middle frame 211 along the Y-axis direction. In some other embodiments, the speaker module 30 may also be fixed to the aforementioned second middle frame 221 .

[0108] See also Figure 8 , Fig.13 and Fig.14 , Fig.13 for Figure 8 A schematic diagram of the exploded structure of a portion of the assembly structure shown, Fig.14 for Fig.13The schematic diagram of the structure of the mounting frame 31 of the speaker module 30 is shown. The electronic device 100 also includes a sealing member 40. The speaker module 30 includes a mounting frame 31, a sound-emitting device 32 and a protective film 33. The mounting frame 31 can be an integral structure with the bracket of the camera module. The mounting frame 31 includes a fourth fixing portion 311 and a matching portion 312. The fourth fixing portion 311 has a first mounting groove 3111. The first mounting groove 3111 can penetrate the two surfaces of the fourth fixing portion 311 arranged along the Z-axis direction. The sound-emitting device 32 is arranged in the first mounting groove 3111 and the sound outlet of the sound-emitting device 32 faces the matching portion 312. The fourth fixing portion 311 can be fixed to the first part 21121 of the first middle plate 2112 by means of snap connection, bonding, screw connection, etc., that is, the speaker module 30 is arranged on the first middle plate 2112 and is located between the first middle plate 2112 and the aforementioned first back cover.

[0109] The matching portion 312 is located at the side facing the first surface 21121a of the first portion 21121, and extends from the fourth fixing portion 311 to the direction close to the first frame segment 21111, and the surface of the matching portion 312 facing the first frame segment 21111 forms a matching surface 312a. Along the Y-axis direction, the matching surface 312a extends from an end close to the first portion 21121 to an end away from the first portion 21121 in a direction gradually close to the first frame segment 21111.

[0110] The surface of the matching portion 312 facing the first portion 21121 has a fifth recessed portion 3121. Along the Y-axis direction, the fifth recessed portion 3121 penetrates the aforementioned matching surface 312a and the side wall of the first mounting groove 3111, so that the matching portion 312 is formed with a first convex ridge 3122 and a second convex ridge 3123 spaced along the X-axis direction. The surface of the first convex ridge 3122 facing the first frame segment 21111 forms a first matching area 312b, the surface of the second convex ridge 3123 facing the first frame segment 21111 forms a second matching area 312c, and the matching surface 312a portion other than the first matching area 312b and the second matching area 312c forms a third matching area 312d. The orthographic projection of the first matching area 312b in the first plane can coincide with the orthographic projection of the second matching area 312c in the first plane, and the first plane is a plane perpendicular to the extension direction of the first frame segment 21111. In some other embodiments, the orthographic projection of the first matching area 312b in the first plane may not overlap with the orthographic projection of the second matching area 312c in the first plane.

[0111] On this basis, the protective film 33 is located on the side facing the opening of the fifth recessed portion 3121, and covers the opening of the fifth recessed portion 3121 and the opening of the first mounting groove 3111 along the Z-axis direction facing away from the first end surface 21111a. In this way, the protective film 33 can prevent water vapor and dust from entering the sound-emitting device 32 of the speaker module 30 to damage the speaker module 30, thereby causing malfunction of the electronic device 100.

[0112] Based on the above, please refer to Fig.12 and Fig.13 , the first part 21121 is provided with a first mounting hole 2112g, and the first mounting hole 2112g is located on the side of the first recessed part 2112a away from the first frame segment 21111. The first mounting hole 2112g runs through the first surface 21121a and the second surface 21121b. The orthographic projection of the first mounting hole 2112g in the second plane overlaps with the orthographic projection of the first fixing part 211312 in the second plane, wherein the second plane is a plane perpendicular to the arrangement direction (Y-axis direction) of the inner side surface and the outer side surface of the first frame segment 21111. Based on this, a part of the loudspeaker module 30 is located in the first mounting hole 2112g. Specifically, a partial area of ​​the surface of the fourth fixing part 311 facing away from the first end surface 21111a along the Z-axis direction can be located in the first mounting hole 2112g, or it can be flush with the second surface 21121b of the first part 21121, and this application does not limit this.

[0113] In this way, the thickness of the speaker module 30 and the first part 21121 as a whole is less than the sum of the thickness of the speaker module 30 and the thickness of the first part 21121, which can reduce the overall thickness of the electronic device 100, so as to achieve the thinness of the electronic device 100. In addition, the first mounting hole 2112g is located on the side of the first fixing portion 211312 away from the first frame segment 21111, so that the first mounting hole 2112g and the first recessed portion 2112a are spaced apart along the Y-axis direction, and the first mounting hole 2112g is far away from the first gap 2111a. While achieving the thinness of the electronic device 100, the strength of the first middle plate 2112 can be guaranteed as much as possible, and then the overall strength of the first middle frame 211 is guaranteed, thereby ensuring the strength of the entire electronic device 100.

[0114] On this basis, see Fig.12 and Fig.13The surface of the first protrusion 211212 that is away from the first frame segment 21111 and connected to the first plate portion 211211 is connected to the surface of the first fixing portion 211312 that is opposite to the second surface 211b to form a first supporting surface 211a1. The first supporting surface 211a1 forms a partial area of ​​the first surface 211a. The first supporting surface 211a1 extends from the first frame segment 21111 to the first recessed portion 2112a, gradually approaching the second surface 211b. Similarly, when the second fixing portion 211313 and the first portion 21121 are combined in the same manner as the first fixing portion 211312 and the first portion 21121, the surface of the second fixing portion 211313 facing away from the second surface 211b forms a part of the second supporting surface 211a2, the second supporting surface 211a2 forms a partial area of ​​the first surface 211a, the second supporting surface 211a2 is connected to the first plate portion 211211 and extends from the first frame segment 21111 to the first recessed portion 2112a in a direction gradually approaching the second surface 211b.

[0115] The surface of the third fixed portion 211314 that is opposite to the first frame segment 21111 and is located on the side of the first sound outlet channel away from the first part can form a third supporting surface 211a3, and the third supporting surface 211a3 forms a partial area of ​​the first surface 211a, and the two ends of the third supporting surface 211a3 distributed along the X-axis direction are respectively connected to an end of the first supporting surface 211a1 away from the first part 21121 and an end of the second supporting surface 211a2 away from the first part 21121, so that the first supporting surface 211a1, the second supporting surface 211a2 and the third supporting surface 211a3 form a continuous supporting surface.

[0116] Based on this, see Fig.13 and Fig.15 , Fig.15 for Figure 8 The cross-sectional structure diagram of the assembly structure at line DD is shown. The portion of the fourth fixing portion 311 located on the periphery of the sound-emitting device 32 is connected to the area of ​​the first surface 21121a located on the periphery of the first mounting hole 2112g, the first ridge 3122 is connected to the surface of the first portion 21121, the second ridge 3123 is connected to the surface of the first portion 21121, the first matching area 312b is adapted and connected to the first supporting surface 211a1, the second matching area 312c is adapted and connected to the second supporting surface 211a2, and the third matching area 312d is adapted and connected to the third supporting surface 211a3, so that the fifth recessed portion 3121 is opposite to and connected to the opening of the first sound outlet channel 21131a of the first plastic portion 21131 that is opposite to the first frame segment 21111.

[0117] Please continue reading Fig.13 and Fig.15 The sealing member 40 is provided with a second through hole 41 and a third through hole 42. The inner side wall of the second through hole 41 is arranged around the first mounting hole 2112g, and the inner side wall of the third through hole 42 is arranged around the first sound outlet channel 21131a. The sealing member 40 can be bonded to the area of ​​the first surface 21121a located around the first mounting hole 2112g, the first supporting surface 211a1, the second supporting surface 211a2 and the third supporting surface 211a3 by adhesive, and abuts against the fourth fixing portion 311 and the matching portion 312 of the speaker module 30. The sealing member 40 can be a foam or other elastic sealing member 40, which is not limited in the present application.

[0118] In this way, the seal 40 can prevent dust and water vapor outside the electronic device 100 from entering the sound device 32 of the speaker module 30 from the first sound outlet hole 2111b, the first sound outlet channel 21131a, and the fifth recessed portion 3121 to damage the sound device 32, and can also prevent dust and water vapor from entering the first middle frame 211 from the gap between the speaker module 30 and the first middle frame 211 to damage the main circuit board, camera module and other components of the electronic device 100, thereby ensuring the reliability of the electronic device 100. In addition, the inclined structure of the first support surface 211a1, the second support surface 211a2 and the third support surface 211a3 facilitates the fixing of the seal 40 to ensure the reliability of the waterproofness of the entire electronic device 100.

[0119] Figure 8 and Fig. 9 In the illustrated embodiment, the manufacturing process of the first middle frame 211 may include the following steps:

[0120] First, a first middle frame blank is made from metal materials through processes such as die casting or hot forging, wherein the first middle frame blank includes an initial first frame and an initial first middle plate, wherein the initial first middle plate is located on the inner side of the initial first frame, and a first gap 2111a is provided between the first part of the initial first middle plate and the first frame segment of the initial first frame, and a first protrusion 211212 is provided at the edge area of ​​the first part facing the first frame segment.

[0121] Next, a computer numerical control machine tool (CNC) is used to process the initial first frame and the initial first middle plate to form a first frame 2111 and a first middle plate 2112. A first recessed portion 2112a is formed on the first raised portion 211212 of the first middle plate 2112. The first recessed portion 2112a does not penetrate the surface of the first raised portion 211212 away from the first frame segment 21111.

[0122] Next, the plastic material is filled into the first gap 2111a through an injection molding process to form a filling portion 211311. The plastic material is also filled into the first recessed portion 2112a and covers the surface of the first portion 21121 between the first recessed portion 2112a and the first gap 2111a to form an initial first fixing portion, thereby forming a first middle frame semi-finished product.

[0123] Next, the first middle frame semi-finished product is processed by CNC to remove material to form the first middle frame 211, wherein the first middle frame 211 has a first surface 211a and a second surface 211b distributed along its thickness direction, and the surface of the first protruding portion 211212 facing away from the first frame segment 21111 is connected with the surface of the first fixing portion 211312 facing away from the second surface 211b to form the aforementioned first supporting surface 211a1, that is, a portion of the surface of the first protruding portion 211212 forms a portion of the first supporting surface 211a1, and a portion of the surface of the first fixing portion 211312 forms another portion of the first supporting surface 211a1, and the first supporting surface 211a1 forms a partial area of ​​the first surface 211a.

[0124] See also Figure 16-Figure 18 , Fig.16 for Figure 2 Another partial structural diagram of the first middle frame 211 of the electronic device 100 is shown. Fig.17 for Fig.16 The schematic diagram of the exploded structure of the first middle frame 211 is shown in FIG. Fig.18 for Fig.16 The cross-sectional structure diagram of the first middle frame 211 is shown at line EE. Figure 16-Figure 18 The embodiment shown is Figure 9-12 The difference of the embodiment shown is that: the first recessed portion 2112a is provided in the first plate portion 211211, the first recessed portion 2112a does not have a first bottom wall, the first side wall 2112a1 and the second side wall 2112a2 of the first recessed portion 2112a are connected end to end to form a continuous closed side wall surface, that is, the first recessed portion 2112a passes through the second surface 21121b of the first portion 21121 of the first middle plate 2112. The end of the first fixing portion 211312 of the first plastic portion 21131 away from the first frame segment 21111 fills the first recessed portion 2112a, that is, the first plastic portion 21131 also covers the second side wall 2112a2.

[0125] Based on this, the edge of the first fixing portion 211312 away from the first frame segment 21111 and connected to the first surface 21121a coincides with the edge of the second side wall 2112a2 connected to the first surface 21121a, and the surface area of ​​the first fixing portion 211312 facing away from the second surface 211b and connected to the first plate portion 211211 forms the first supporting surface 211a1, and the first supporting surface 211a1 extends from the first frame segment 21111 to the first recessed portion 2112a in a direction gradually approaching the second surface 211b. That is, a partial surface of the first fixing portion 211312 forms the entire first supporting surface 211a1. Similarly, the combination method of the second fixing portion 211313 and the first part 21121 can also be the same as the combination method of the first fixing portion 211312 and the first part 21121. The surface area of ​​the second fixing portion 211313 facing away from the second surface 211b and connected to the first plate portion 211211 can form the entire second supporting surface 211a2, that is, the surface of the second fixing portion 211313 facing away from the second surface 211b forms at least a part of the second supporting surface.

[0126] In this way, the filling portion 211311, the first fixing portion 211312 and the second fixing portion 211313 can be formed by integral injection molding, and there is no need to perform CNC processing on the first middle frame 211 after injection molding to form the filling portion 211311, the first fixing portion 211312 and the second fixing portion 211313, thereby improving the manufacturing efficiency of the first middle frame 211 and further improving the manufacturing efficiency of the electronic device 100.

[0127] In addition, by making the first recessed portion 2112a pass through the second surface 21121b, the portion of the first middle frame 211 of the first fixing portion 211312 away from the first frame segment 21111 (for example, the thickness of the first middle frame 211 portion along the Z-axis direction is 0.25 mm-0.35 mm) is thinner to achieve a lightweight electronic device 100. At the same time, the thickness of the end of the first fixing portion 211312 away from the first frame segment 21111 in the Z-axis direction can be as thick as possible, which can prevent the first fixing portion 211312 from being entirely located on the side of the first portion 21121 facing away from the second surface 211b, where the thickness of the first fixing portion 211312 and the thickness of the first portion 21121 are both thin, making it impossible to ensure the bonding strength of the first fixing portion 211312 and the first portion 21121, and the respective structural strengths of the first fixing portion 211312 and the first portion 21121. Therefore, this structure can ensure the bonding strength between the first plastic part 21131 and the first middle plate 2112 while achieving the lightness and thinness of the electronic device 100 .

[0128] See also Fig.18 and Fig.19 , Fig.19 for Fig.16 The schematic diagram of the partial structure of the first middle frame 211 when viewed from another perspective is shown. The second side wall 2112a2 of the first recessed portion 2112a is provided with a second recessed portion 2112c, and the second recessed portion 2112c penetrates the second surface 21121b along the thickness direction of the first middle frame 211. Based on this, the first fixing portion 211312 also covers the bottom wall and side wall of the second recessed portion 2112c, that is, the first plastic portion 21131 fills the second recessed portion 2112c and covers the bottom wall and side wall of the second recessed portion 2112c. In some other embodiments. The second recessed portion 2112c can also penetrate the first surface 21121a of the first part 21121 along the thickness direction of the first middle frame 211, and the first fixing portion 211312 covers the bottom wall and side wall of the second recessed portion 2112c. In some other embodiments, when the first recessed portion 2112a is opened in the aforementioned first protruding portion 211212, the second recessed portion 2112c may not penetrate the first surface 21121a or the second surface 21121b of the first middle plate 2112.

[0129] In this way, when dust and water vapor outside the electronic device 100 penetrate from one side of the first part 21121 of the first middle plate 2112 to the other side, the path passed is the gap caused by the process error between the second side wall 2112a2 and the first fixing part 211312, the gap caused by the process error between the first fixing part 211312 and the bottom wall of the second recessed part 2112c, and the gap caused by the process error between the first fixing part 211312 and the side wall of the second recessed part 2112c. In this way, the path for water vapor to penetrate from one side of the first part 21121 to the other side is longer, which can ensure the waterproof performance of the electronic device 100 to meet the IPX8 waterproof level requirements. Among them, the IPX8 waterproof level means that the performance of the electronic device 100 is not affected and does not leak water when the top is 1.5-30 meters away from the water surface for 30 consecutive minutes.

[0130] On the basis of the above, please continue to refer to Fig.19 The second side wall 2112a2 of the first recessed portion 2112a includes a first end 2112a3 and a second end 2112a4 connected to the first side wall 2112a1. Along the extension track of the second side wall 2112a2 from the first end 2112a3 to the second end 2112a4, the second recessed portion 2112c extends from the first end 2112a3 to the second end 2112a4. Fig.19In the illustrated embodiment, along the extension direction of the first frame segment 21111, the maximum width of the second recessed portion 2112c is equal to the distance between the first end 2112a3 and the second end 2112a4. In some other embodiments, along the extension direction of the first frame segment 21111, the line between the two points on the bottom wall of the second recessed portion 2112c with the largest distance is the first line segment, the length of the first line segment is greater than the distance between the first end 2112a3 and the second end 2112a4, and the orthographic projection of the first line segment in the third plane overlaps with the orthographic projection of the first recessed portion 2112a in the third plane. The third plane is a plane perpendicular to the thickness direction of the first middle frame 211.

[0131] On this basis, along the direction from the first frame segment 21111 to the first recessed portion 2112a, the minimum width L of the second recessed portion 2112c is greater than or equal to 0.3 mm. For example, the minimum width L of the second recessed portion 2112c can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc. In this way, the waterproof performance of the first middle frame 211 can be ensured as much as possible, thereby ensuring the waterproof performance of the electronic device 100.

[0132] See also Figure 16-Figure 18 , the first raised portion 211212 of the first middle plate 2112 is connected to the surface of the first plate portion 211211 facing away from the second surface 21121b and is located between the first recessed portion 2112a and the first frame segment 21111. A portion of the first raised portion 211212 extends from the first plate portion 211211 in the direction facing away from the second surface 21121b, and another portion of the first raised portion 211212 extends from the end of the aforementioned portion away from the first plate portion 211211 in the direction facing away from the first frame segment. The first fixing portion 211312 also fills the space enclosed by the first raised portion 211212 and the first plate portion 211211, and covers the first raised portion 211212. In this way, the bonding strength between the first plastic portion 21131 and the first middle plate 2112 can be further enhanced, thereby ensuring the overall strength of the first middle frame 211. In some other embodiments, the first portion 21121 may not include the first protrusion 211212 .

[0133] See also Fig.17, the first surface 21121a of the first part 21121 also has a fourth recessed portion 2112e, the fourth recessed portion 2112e is located between the first recessed portion 2112a and the first frame segment 21111, and the fourth recessed portion 2112e runs through the first side wall 2112a1 of the first recessed portion 2112a. Specifically, a portion of the fourth recessed portion 2112e extends along the X-axis direction, and another portion extends along the Y-axis direction. Based on this, a portion of the first plastic part 21131 fills the fourth recessed portion 2112e and covers the bottom wall and side wall of the fourth recessed portion 2112e. In this way, the bonding strength between the first plastic part 21131 and the first middle plate 2112 can be further enhanced, thereby ensuring the overall strength of the first middle frame 211. In some other embodiments, the first surface 21121a may not have the fourth recessed portion 2112e.

[0134] Based on the above, please refer to Fig.10 , Fig.16 and Fig.17 , the first frame segment 21111 has a gap 21111c, and the gap 21111c runs through the inner side, outer side, first end face 21111a and second end face 21111b of the first frame segment 21111, and the gap 21111c is connected with the first gap 2111a so that the first frame segment 21111 forms a plurality of antenna radiators spaced apart from each other. Based on this, the plastic part 2113 also includes a second plastic part 21132, that is, the first middle frame 211 also includes a second plastic part 21132, and the second plastic part 21132 is connected to the first plastic part 21131 and fills the aforementioned gap 21111c. Specifically, the first plastic part 21131 and the second plastic part 21132 can be an integrally molded structure. Along the extension direction of the first frame segment 21111, the gap 21111c and the first fixing part 211312 can be aligned or staggered, and this application does not limit this. The number of gaps 21111c may be one or more, and this application does not impose any limitation on this.

[0135] In this way, a part or multiple parts of the first frame segment 21111 can form an antenna radiator, and there is no need to design and install the antenna radiator separately, which simplifies the structure of the electronic device 100. In addition, the first plastic part 21131 is an insulating structure, which can make the antenna radiator have a larger clearance height, ensuring the reliability of the electronic device 100 in sending and receiving wireless signals.

[0136] On the basis of the above, the connection mode between one end of the first middle plate 2112 facing the second frame segment 21112 and the second frame segment 21112, and the connection mode between one end of the first middle plate 2112 facing the third frame segment 21113 and the third frame segment 21113 can refer to the connection mode between one end of the first middle plate 2112 facing the first frame segment 21111 and the first frame segment 21111. In some other embodiments, there may be no gap between one end of the first middle plate 2112 facing the second frame segment 21112 and the second frame segment 21112, and there may be no gap between one end of the first middle plate 2112 facing the third frame segment 21113 and the third frame segment 21113, which is not limited in the present application.

[0137] The above embodiment describes the structure of the first middle frame 211 of the electronic device 100 in detail. The structure of the second middle frame 221 of the electronic device 100 can refer to the structure of the first middle frame 211, which will not be repeated here. In some other embodiments, the electronic device 100 can also be a non-foldable handheld device, which can be, for example, a mobile phone. In this case, the support device of the electronic device 100 does not include the second shell 22 and the hinge mechanism 23, and the first frame 2111 also includes a fourth frame segment (not shown in the figure), which is opposite to the first frame segment 21111 and is arranged at intervals. The first frame segment 21111, the second frame segment 21112, the third frame segment 21113 and the fourth frame segment are connected end to end in sequence to form the first frame 2111. The entire screen and the first back cover 212 are respectively located on both sides of the first middle plate 2112 and fixed to the first middle frame 211.

[0138] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0139] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A middle frame, characterized in that: include: a first frame, the first frame comprising a first frame segment; A first middle plate, the first middle plate is located on the inner side of the first frame; the first middle plate includes a first portion, the first portion is spaced from the first frame segment to form a first gap; the first portion includes a first surface and a second surface opposite to each other, the first surface and the second surface are arranged along the thickness direction of the middle frame; the first surface has a first recessed portion recessed toward the second surface, and the first recessed portion has a first side wall opposite to the first frame segment; A first plastic part, the first plastic part is located on the inner side of the first frame and connected between the inner side surface of the first frame segment and the first part, a part of the first plastic part fills the first gap, and a part of the first plastic part is located in the first recessed part and covers the first side wall.

2. The middle frame according to claim 1, characterized in that: The first recessed portion further includes a second side wall, and the second side wall is located on a side of the first side wall facing away from the first frame segment; The first plastic portion also covers the second side wall.

3. The middle frame according to claim 2, characterized in that: The second side wall has a second recessed portion; A portion of the first plastic portion is located in the second recessed portion and covers the side wall and the bottom wall of the second recessed portion.

4. The middle frame according to claim 3, characterized in that: The first recessed portion penetrates the second surface.

5. The middle frame according to claim 4, characterized in that: The second recessed portion penetrates the second surface along the thickness direction of the middle frame; or, The second recessed portion penetrates the first surface along a thickness direction of the middle frame.

6. The middle frame according to claim 5, characterized in that: The second side wall is connected end to end with the first side wall; The second side wall includes a first end and a second end connected to the first side wall; along an extension trajectory of the second side wall from the first end to the second end, the second recessed portion extends from the first end to the second end.

7. The middle frame according to claim 6, characterized in that: Along the direction from the first frame segment to the first recessed portion, the minimum width of the second recessed portion is greater than or equal to 0.3 mm.

8. The middle frame according to any one of claims 1 to 7, characterized in that: The first side wall has a third recessed portion recessed toward the first frame segment, and the third recessed portion does not penetrate the first surface; a portion of the first plastic portion is located in the third recessed portion and covers the bottom wall and side walls of the third recessed portion.

9. The middle frame according to any one of claims 4 to 7, characterized in that: The first surface further has a fourth recessed portion, the fourth recessed portion is located between the first recessed portion and the first frame segment, and the fourth recessed portion runs through the first side wall; A portion of the first plastic portion is located in the fourth recessed portion and covers the bottom wall and the side wall of the fourth recessed portion.

10. The middle frame according to any one of claims 4 to 7, characterized in that: The first portion includes a first plate portion and a first protrusion, the first recessed portion is provided on the first plate portion; the first protrusion is connected to a surface of the first plate portion facing away from the second surface and is located between the first recessed portion and the first frame segment; a portion of the first protrusion extends from the first plate portion in a direction facing away from the second surface, and another portion of the first protrusion extends from an end of the portion away from the first plate portion in a direction facing away from the first frame segment; A portion of the first plastic portion is located in a space enclosed by the first protruding portion and the first plate portion, and covers the first protruding portion.

11. The middle frame according to any one of claims 1 to 7, characterized in that: The first plastic part comprises: a filling portion, the filling portion filling the first gap; A first fixing portion is connected to the filling portion and extends from the filling portion toward the inner side of the first frame, and the first fixing portion covers the first side wall.

12. The middle frame according to claim 11, characterized in that: The first portion includes a first plate portion and a first protruding portion, the first protruding portion is connected to a surface of the first plate portion facing away from the second surface, and at least a portion of the first recessed portion is opened in the first protruding portion.

13. The middle frame according to claim 12, characterized in that: The surface of the first protrusion away from the first frame segment and connected to the first plate portion is connected to the surface of the first fixing portion facing away from the second surface to form a first supporting surface, and the first supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface.

14. The middle frame according to claim 11, characterized in that: A surface area of ​​the first fixing portion that faces away from the second surface and is in contact with the first surface forms a first supporting surface, and the first supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface.

15. The middle frame according to claim 13 or 14, characterized in that: The first plastic part further includes a second fixing part, the second fixing part is connected to the filling part and extends from the filling part to the inner side of the first frame, the second fixing part and the first fixing part are arranged at intervals along the extension direction of the first frame segment, and the second fixing part is connected to the first part; The surface of the second fixing portion facing away from the second surface forms at least a portion of a second supporting surface, and the second supporting surface extends from the first frame segment to the first recessed portion in a direction gradually approaching the second surface.

16. The middle frame according to claim 11, characterized in that: The first plastic part also includes a second fixing part, which is connected to the filling part and extends from the filling part to the inner side of the first frame. The second fixing part and the first fixing part are spaced apart along the extension direction of the first frame segment, and the second fixing part is connected to the first part.

17. The middle frame according to claim 16, characterized in that: The first surface is further provided with at least one second protrusion, and the at least one second protrusion is located between the first fixing portion and the second fixing portion, and between an end of the first fixing portion away from the first frame segment and the first frame segment; The first plastic portion further includes a third fixing portion, the third fixing portion extending from the filling portion toward the inner side of the first frame and covering the at least one second protruding portion; and / or, The first portion further has a plurality of first through holes, the plurality of first through holes penetrate the first surface and the second surface along the thickness direction of the middle frame and are located between the first fixing portion and the second fixing portion, and the plurality of first through holes are located between an end of the first fixing portion away from the first frame segment and the first frame segment; The first plastic portion further includes a third fixing portion, and the third fixing portion extends from the filling portion toward the inner side of the first frame and fills the plurality of first through holes.

18. The middle frame according to claim 11, characterized in that: The first frame segment has a first sound outlet hole, and the first sound outlet hole passes through the outer side surface and the inner side surface of the first frame segment; The first plastic part has a first sound outlet channel, which runs through the surface of the first plastic part facing away from the first frame segment and is connected to the first sound outlet hole. Part of the inner wall surface of the first sound outlet channel is formed on the first fixing part.

19. The middle frame according to claim 18, characterized in that: The first portion is provided with a first mounting hole, which is located on a side of the first recessed portion away from the first frame segment; the first mounting hole passes through the first surface and the second surface; and the first mounting hole is used to accommodate a part of the speaker module.

20. The middle frame according to any one of claims 1 to 7, characterized in that: The first frame segment is a metal structure, the first frame segment has at least one gap so that the first frame segment forms a plurality of antenna radiators spaced apart from each other, and the at least one gap is connected to the first gap; The middle frame further includes at least one second plastic part, and one second plastic part is connected to the first plastic part and fills one of the gaps.

21. An electronic device, characterized in that: include: A first middle frame, wherein the first middle frame is the middle frame according to any one of claims 1 to 17 and 20; A screen, at least a portion of which is stacked with the first middle plate and located on one side of the first middle plate, and at least a portion of which is fixed to the first middle frame; The first back cover is stacked with the first middle plate and is located on a side of the first middle plate facing away from the screen. The first back cover is fixed to the first middle frame.

22. An electronic device, characterized in that: include: A first middle frame, wherein the first middle frame is the middle frame according to claim 18 or 19; A screen, at least a portion of which is stacked with the first middle plate and located on one side of the first middle plate, and at least a portion of which is fixed to the first middle frame; A first back cover, the first back cover is stacked with the first middle plate and is located on a side of the first middle plate facing away from the screen, and the first back cover is fixed to the first middle frame; A speaker module is disposed on the first middle plate and is located between the first middle plate and the first back cover, and a sound outlet hole of the speaker module is connected to the first sound outlet channel.

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