A middle frame and electronic device
By using frames and central support plates made of different materials in electronic devices, combined with floating ribs and insulating connections, an antenna radiator is formed, which solves the problems of limited antenna installation space and insufficient structural strength, and achieves the effects of miniaturization and cost reduction of the device.
Patent Information
- Application Number
- CN202521690437.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-08
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-08
AI Technical Summary
In the prior art, the limited space for antenna placement in electronic devices makes it difficult to miniaturize the devices, while the slots in the metal frame reduce strength and increase cost.
The antenna radiator is formed by using frames and central support plates made of different metal materials, combined with suspended ribs and insulation connections. It is then fixed by welding and nano-injection molding processes to enhance structural strength and communication performance.
It improves the wireless transmission performance of the antenna, enhances the overall strength of the electronic device, reduces manufacturing costs, and simplifies the process.
Smart Images
Figure CN224683365U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic device technology, and more particularly to a mid-frame and an electronic device. Background Technology
[0002] The communication functions of electronic devices are being applied in more and more areas of production and daily life, taking terminal products as an example. The application of terminal products in mobile office work allows office workers to break free from the constraints of time and space. Organizational information can flow smoothly and interactively anytime, anywhere, making work easier and more efficient, and overall operations more coordinated.
[0003] Furthermore, with the increase in network communication speeds, users can download movies and upload files faster. This places higher demands on the number of antennas and the space available for their installation. Moreover, electronic devices are trending towards miniaturization, further reducing the space available for antenna placement. The current approach of mounting the antenna on a stand, and then mounting the stand on the electronic device, results in a larger space occupied by the antennas. As the number of antennas increases, this space requirement grows even further, hindering miniaturization of electronic devices and potentially leading to performance degradation, such as reduced battery capacity and consequently, shorter battery life.
[0004] Therefore, one technical solution utilizes the metal frame of the electronic device to form the antenna radiator. This solution requires slots in the metal frame, reducing its strength. Furthermore, the current method of fabricating the metal frame and internal support plate using a single molding process results in higher costs for the electronic device. Utility Model Content
[0005] This application provides a mid-frame and an electronic device, which reduces the manufacturing cost of the mid-frame, improves the antenna communication performance, enhances the structural strength of the electronic device, and simplifies the manufacturing process of the electronic device.
[0006] Firstly, this application provides a mid-frame, which includes a frame, a central support plate, and a suspension rib. The frame is fixed to the periphery of the central support plate, or in other words, the frame surrounds the central support plate. The frame and the central support plate are made of different metal materials; specifically, the frame and the central support plate can be manufactured using different metal compositions, or the manufacturing processes for the frame and the central support plate can be different. The frame includes a slot, and the suspension rib is located on the side of the frame facing the central support plate in the area of the slot. Specifically, the suspension rib is located between the frame and the central support plate, and the suspension rib is opposite to the slot. The suspension rib is insulated from the frame and the central support plate, respectively, so it will not become the reference ground of the antenna. This is beneficial for improving the wireless transmission performance of the antenna while also improving the overall strength of the electronic device, making the electronic device less prone to reliability problems such as cracking or poor airtightness. Furthermore, the suspension rib is made of the same metal material as the frame, or the suspension rib is made of the same metal material as the central support plate. This simplifies the manufacturing process of the suspension rib.
[0007] In some technical solutions, the aforementioned frame and central support plate can be welded together. Specifically, during the fabrication of the central frame, welding can be used to pre-connect the frame and central support plate, followed by the use of nano-injection molding to fabricate an injection molded part that connects the frame and central support plate. Welding is a reliable and cost-effective method.
[0008] Specifically, the radiator of the frame antenna is formed using the aforementioned frame, and the grounding end of the radiator is welded to the middle support plate. Thus, the welding connection between the frame and the middle support plate not only achieves a fixed connection between the frame and the middle support plate, but also simultaneously grounds the radiator.
[0009] The aforementioned floating ribs extend along the extension direction of adjacent frame edges. The dimensions of the floating ribs are such that the cross-sectional area of at least a portion of the rib is greater than or equal to 1 square millimeter, and this cross-section is perpendicular to the extension direction. This technical solution allows the floating ribs to possess high strength, effectively improving the strength of the middle frame edge and enhancing the reliability of electronic devices.
[0010] In a further technical solution, the aforementioned suspended rib extends along the extension direction of the adjacent frame. The length 'a' of the cross-section of at least a portion of the suspended rib along the first direction and the length 'b' of the cross-section along the second direction satisfy: a ≥ 1 mm, b ≥ 1 mm, the cross-section is perpendicular to the extension direction, and the first and second directions are perpendicular. Therefore, the suspended rib has strong strength along both the first and second directions, which helps to improve the strength of the middle frame in any direction and meets the reliability requirements of electronic devices.
[0011] Similarly, the aforementioned suspended ribs extend along the extension direction of the adjacent frame. For ease of description, the two ends of the suspended ribs along the extension direction are considered as the first end and the second end, respectively; the end faces of the frame facing the opening are considered as the first end face and the second end face, respectively. The first end is located on the side of the first end face away from the second end face, and the second end is located on the side of the second end face away from the first end face. Along the aforementioned extension direction, the suspended ribs completely cover the area of the opening, which is beneficial to improving the structural strength near the opening of the frame. The distance L1 between the first end and the first end face along the extension direction and the distance L2 between the second end and the second end face along the extension direction satisfy: |L1-L2|≤5%*L1. The suspended ribs are relatively symmetrically arranged relative to the opening, so when the frame is subjected to external forces, the forces on the suspended ribs are relatively symmetrical and uniform, and the two sides of the opening can receive relatively symmetrical reverse forces from the suspended ribs, which is beneficial to improving the protection effect on the frame. Moreover, the manufacturing process of the suspended ribs has a large tolerance capacity, reducing the precision requirements for the manufacturing of the suspended ribs.
[0012] Alternatively, in a further technical solution, the distance L1 between the first end and the first end face along the extension direction and the distance L2 between the second end and the second end face along the extension direction satisfy: L1 = L2. Then, when the frame is subjected to external forces, the forces acting on the suspended ribs are more symmetrical and uniform. The ribs can symmetrically receive the reverse forces on both sides of the opening, which is beneficial for further improving the protective effect on the frame.
[0013] The suspended ribs extend along the adjacent frame direction, and the length of the suspended ribs along the extension direction is greater than or equal to 14mm. This allows the suspended ribs to cover the gapped areas of the frame over a larger area, which helps to improve the strength of the gapped areas of the frame and enhance the overall structural reliability of the machine.
[0014] There are various options for the specific metal materials used for the aforementioned frame and central support plate. For example, in some technical solutions, the frame is a profiled aluminum frame, and the central support plate is a die-cast aluminum central support plate; alternatively, the frame is a titanium alloy frame, and the central support plate is a profiled aluminum central support plate; or, the frame is a titanium alloy frame, and the central support plate is a die-cast aluminum central support plate. This allows for a smoother, flatter surface on the frame while reducing the cost of the central frame and consequently, the cost of the electronic device.
[0015] Secondly, this application also provides an electronic device including a back cover and the mid-frame provided in the first aspect, wherein the back cover and the mid-frame are fixedly connected. This improves antenna communication performance while enhancing the structural strength of the electronic device and simplifying its manufacturing process. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of an electronic device in an embodiment of this application;
[0017] Figure 2 This is a three-dimensional structural diagram of the middle frame in an embodiment of this application;
[0018] Figure 3 This is a partial three-dimensional structural diagram of the middle frame in an embodiment of this application;
[0019] Figure 4 This is a top view of one of the middle frame structures in an embodiment of this application;
[0020] Figure 5 This is a partial top view of the middle frame in an embodiment of this application;
[0021] Figure 6 This is a schematic diagram of the fabrication process of the middle frame in an embodiment of this application;
[0022] Figure 7 This is a partial structural schematic diagram of the fabrication process of the middle frame in an embodiment of this application;
[0023] Figure 8 This is a partial structural schematic diagram of the fabrication process of the middle frame in an embodiment of this application;
[0024] Figure 9 This is a partial cross-sectional view of the middle frame in an embodiment of this application;
[0025] Figure 10 This is a partial structural diagram of the middle frame in an embodiment of this application.
[0026] Figure label:
[0027] 10 - Electronic devices; 11 - Mid-frame;
[0028] 111 - Border; 1111 - Seam;
[0029] 1112 - First end face; 1113 - Second end face;
[0030] 112 - Middle support plate; 113 - Suspended rib;
[0031] 1131 - First end; 1132 - Second end;
[0032] 12-Cover plate; 13-Display / module;
[0033] 14 - Printed circuit board; 15 - Back cover;
[0034] 16-Plastic part; 17-First connector;
[0035] 18 - Second connector; X - Extension direction;
[0036] Y - First direction; Z - Second direction. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.
[0038] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.
[0039] References to “an embodiment” or “a specific embodiment” as used in this specification mean that one or more embodiments of this application include a particular feature, structure, or characteristic described in connection with that embodiment. The terms “comprising,” “including,” “having,” and variations thereof mean “including, but not limited to,” unless otherwise specifically emphasized.
[0040] To facilitate understanding of the electronic device provided in the embodiments of this application, its application scenarios will be introduced first below.
[0041] Figure 1 This is a schematic diagram of the structure of an electronic device in an embodiment of this application, such as... Figure 1 As shown, the electronic device in this application can specifically be a terminal device. Figure 1 Taking mobile phones as an example, 10 is an electronic device between China and Israel.
[0042] like Figure 1 As shown, the electronic device 10 may include: a mid-frame 11, a cover 12, a display / module 13, a printed circuit board (PCB) 14, and a rear cover 16. It should be understood that in some embodiments, the cover 12 may be a glass cover, but it may also be replaced with a cover made of other materials, such as an ultra-thin glass cover, a polyethylene terephthalate (PET) cover, etc.
[0043] The cover plate 12 can be set close to the display screen 13, and can be mainly used to protect the display screen 13 from dust.
[0044] In some embodiments, the display screen 13 may include a liquid crystal display (LCD), a light emitting diode (LED) display panel, or an organic light-emitting diode (OLED) display panel, etc., and this application does not limit it in this regard.
[0045] The middle frame 11 mainly serves to support the entire machine. Figure 1 The diagram shows PCB 14 positioned between the middle frame 11 and the back cover 15. It should be understood that in one embodiment, PCB 14 may also be positioned between the middle frame 11 and the display screen 13; this application does not impose any limitations on this. The printed circuit board PCB 14 can be made of flame-retardant material (FR-4) dielectric, Rogers dielectric, or a hybrid dielectric of Rogers and FR-4, etc. Here, FR-4 is a designation for a flame-retardant material grade, and Rogers dielectric is a high-frequency board. Electronic components, such as radio frequency chips, are mounted on PCB 14.
[0046] In one embodiment, a metal layer may be disposed on the printed circuit board PCB 14. This metal layer can be used to ground electronic components carried on the PCB 14, or to ground other components such as bracket antennas, frame antennas, etc. This metal layer may be referred to as a ground plane, grounding plate, or grounding layer. In one embodiment, this metal layer can be formed by etching metal onto the surface of any dielectric layer in the PCB 14. In one embodiment, the grounding metal layer may be disposed on the side of the PCB 14 near the middle frame 11. In one embodiment, the edge of the PCB 14 can be considered as the edge of its grounding layer. In one embodiment, the metal middle frame 11 may also be used to ground the aforementioned components. The electronic device 10 may also have other ground planes / grounding plates, as previously described, and will not be repeated here.
[0047] Due to the compact nature of electronic devices, a ground plane / grounding layer is typically provided in the internal space 0-2mm from the inner surface of the frame. For example, printed circuit boards, intermediate support plates, screen metal layers, and batteries can all be considered part of the ground plane. In one embodiment, a medium is filled between the frame and the ground plane. The length and width of the rectangle formed by the inner surface contour of the filling medium can be simply considered as the length and width of the ground plane; alternatively, the length and width of the rectangle formed by the superimposed contour of all conductive parts inside the frame can be considered as the length and width of the ground plane.
[0048] The electronic device 10 may also include a battery (not shown). The battery may be disposed between the middle frame 11 and the back cover 15, or between the middle frame 11 and the display screen 13, and this application does not limit this. In some embodiments, the PCB 14 is divided into a motherboard and a daughterboard, and the battery may be disposed between the motherboard and the daughterboard. The motherboard may be disposed between the middle frame 11 and the upper edge of the battery, and the daughterboard may be disposed between the middle frame 11 and the lower edge of the battery.
[0049] The electronic device 10 may also include a frame 111, which may be formed of a conductive material such as metal. The frame 111 may be disposed between the display screen 13 and the back cover 15 and extend circumferentially around the periphery of the electronic device 10. The frame 111 may have four sides surrounding the display screen 13 to help secure the display screen 13. In one implementation, the frame 111 made of metal can be directly used as the metal frame of the electronic device 10, forming a metal frame appearance suitable for industrial design (ID). In another implementation, the outer surface of the frame 111 may also be a non-metallic material, such as a plastic frame, forming a non-metallic frame appearance suitable for non-metallic ID.
[0050] In some embodiments, the frame 111 and the middle frame 11 are integrated as a single unit, providing support for the electronic components within the device. The cover plate 12 and the rear cover 15 are respectively fitted along the upper and lower edges of the frame 111 to form the housing of the electronic device. In one embodiment, the frame 111 can be connected to and integrally formed with the middle frame 11. In another embodiment, the frame 111 may include inwardly extending protrusions for connection to the middle frame 11, for example, via spring clips, screws, welding, etc. In one embodiment, the cover plate 12, the rear cover 15, and the middle frame 11 can be collectively referred to as the housing of the electronic device 10. It should be understood that "housing" can be used to refer to part or all of any one of the cover plate 12, the rear cover 15, the frame 111, or the middle frame 11, or to any combination of the cover plate 12, the rear cover 15, or the middle frame 11.
[0051] The back cover 15 can be made of metal; it can also be made of non-conductive material, such as glass back cover, plastic back cover, or other non-metallic back cover; or it can be made of both conductive and non-conductive materials.
[0052] In one embodiment, conductive portions in the middle frame 11 and / or the back cover 15 can serve as a reference ground for the electronic device 10, wherein the frame 111, PCB 14, etc. of the electronic device can be grounded through electrical connection with the reference ground.
[0053] In one embodiment, the frame 111 can at least partially serve as an antenna radiator to receive / transmit radio frequency signals. This portion of the frame serving as the radiator may have a gap with the reference ground, thereby ensuring that the antenna radiator has a good radiation environment.
[0054] In one embodiment, the bezel 111 includes an inwardly extending protrusion for connection to other portions of the mid-frame 11, or to other structures of the mid-frame. In one embodiment, the protrusion includes a conductive material and can also be used to receive a power supply signal or connect to a ground plane, enabling the respective bezel portion to transmit / receive radio frequency signals.
[0055] Figure 1 The electronic device 10 is shown only schematically, and the actual shape, size, and construction of these components are not subject to change. Figure 1 limited.
[0056] Figure 2 This is a three-dimensional structural diagram of the middle frame in an embodiment of this application. Figure 3 This is a partial three-dimensional structural diagram of the middle frame in an embodiment of this application, such as... Figure 2 and Figure 3 As shown, in some embodiments, the middle frame 11 includes a frame 111, a middle support plate 112, and a suspension rib 113. The frame 111 is fixed to the periphery of the middle support plate 112, or in other words, the middle support plate 112 is disposed inside the frame 111. The frame 111 and the middle support plate 112 are made of different metal materials and are manufactured using different processes before being fixedly connected. This solution can use different processes to manufacture the frame 111 and the middle support plate 112 before fixing them. For example, the metal composition of the frame 111 can be made more expensive, and the manufacturing process can be made more expensive, resulting in higher surface strength or smoother surface of the electronic device, thus improving the appearance of the electronic device. The metal composition of the middle support plate 112 can be made less expensive, and the manufacturing process can be made less expensive, thus reducing the cost of the electronic device. Therefore, this solution can improve the surface performance of the electronic device while reducing costs. The aforementioned frame 111 and the middle support plate 112 may also include insulating materials such as plastic parts 16, for example, using nano-injection molding to connect the frame 111 and the middle support plate 112, thereby making the frame 111 and the middle support plate 112 relatively stably fixed as a whole. The aforementioned frame 111 includes a slit 1111, which can also be referred to as a notch, gap, break, opening, or hole, etc. In short, the frame 111 including the slit 1111 divides the frame 111 into two parts that are not directly connected at the slit 1111.
[0057] The electronic device in this embodiment includes an antenna, which comprises a radiator. The antenna of the electronic device is used to receive / transmit electromagnetic waves, thereby enabling the communication function of the electronic device. The efficiency of the antenna system 2 plays a decisive role in the communication capability of the electronic device.
[0058] In one embodiment, the frame 111 is directly used to form the radiator of the antenna. In this embodiment, by setting the slit 1111, on the one hand, the signal can be converted from guided electromagnetic waves to spatial electromagnetic waves through the slit 1111, thereby realizing energy radiation; on the other hand, the slit 1111 breaks the closed loop of the frame 111, so that when it can be used as the radiator of the antenna, the conductive closed loop structure formed will not cause a short circuit in the radiator of the antenna, thus enabling the frame 111 to be used as the radiator of the antenna.
[0059] In one embodiment, a support antenna is provided on one side of the frame 111 facing the central support plate 112. In this embodiment, the frame 111 is divided into multiple strip structures by the slit 1111, allowing the radiators of the corresponding antennas to be arranged on the side of the frame 111 facing the central support plate 112. The radiators of the antennas are made of metal, and for the radiators of the antennas located on the side of the frame 111 facing the central support plate 112, they are positioned close to the slit 1111 of the frame 111, so that the corresponding antenna radiators are not blocked by the metal frame 111 when radiating energy, thus better realizing the conversion of the signal generated by the antenna radiators from guided electromagnetic waves to spatial electromagnetic waves.
[0060] Figure 4 This is a top view of one of the frame structures in an embodiment of this application. Figure 5 This is a partial top view of the middle frame in an embodiment of this application. For example... Figures 2-5As shown, the slots 1111 on the frame 111 reduce its strength. Especially with an increase in the number of antennas, the number of slots 1111 on the frame 111 may also increase, making it difficult for the frame 111 to meet strength requirements. This can easily lead to problems such as cracking or deterioration of airtightness in the electronic device, reducing reliability. The aforementioned floating rib 113 is located on the side of the frame 111 with the slots 1111 facing the middle support plate 112; that is, a floating rib 113 is provided between the slots 1111 and the middle support plate 112. Specifically, the floating rib 113, projected onto the plane of the frame 111, completely covers the slots 1111 along the X-direction of the frame 111. This floating rib 113 is also made of metal, thereby strengthening the area near the slots 1111. The aforementioned floating rib 113 is insulated from the frame 111 and the middle support plate 112, so that the floating rib 113 does not act as a floor relative to the antenna, which helps to increase the antenna's clearance space and thus improve the antenna's over-the-air (OTA) performance, which can also be called over-the-air download performance.
[0061] To analyze the effect of the technical solution of this application on improving the structural strength of electronic devices, the inventors conducted a small-span simulation comparison test, specifically comparing the strength of electronic devices in several scenarios: with grounding reinforcement, without reinforcement, and with suspension reinforcement 113. Grounding reinforcement refers to reinforcement connected to the floor, such as the reinforcement connecting to the central support plate 112. Simulations were performed with forces applied to the same location, and the results are shown in Table 1. As shown in Table 1, with the grounding reinforcement as the baseline, when the electronic device has no reinforcement, the strength gain is -30%, meaning the strength of the electronic device without reinforcement is reduced by 30% compared to the electronic device with grounding reinforcement. However, when the electronic device includes suspension reinforcement 113, the strength gain is +53%, meaning the strength of the electronic device with suspension reinforcement 113 is increased by 53% compared to the electronic device with grounding reinforcement.
[0062] Comparative Example income Grounding reinforcement 0 No reinforcing ribs -30％ Suspended ribs +53％
[0063] Table 1
[0064] Figure 6 This is a schematic diagram illustrating the fabrication process of the middle frame in an embodiment of this application. Figure 7 This is a partial structural schematic diagram of the fabrication process of the middle frame in an embodiment of this application. For example... Figure 6 and Figure 7As shown, in some embodiments, the aforementioned floating rib 113 and the frame 111 are made of the same metal material, so that the floating rib 113 and the frame 111 can be manufactured using the same process when manufacturing the electronic device. For example, the floating rib 113 and the frame 111 can be manufactured as an integral piece, and the floating rib 113 and the frame 111 are connected by a first connector 17. After the frame 111 and the middle support plate 112 are fixedly connected, for example, the frame 111 and the middle support plate 112 are connected by a plastic part 16, the floating rib 113 can be located in the plastic part 16. Then, the first connector 17 between the floating rib 113 and the frame 111 can be removed, so that the floating rib 113 and the frame 111 are disconnected, simplifying the manufacturing process of the floating rib 113, and thus simplifying the manufacturing process of the electronic device.
[0065] Figure 8 This is a partial structural schematic diagram of the fabrication process of the middle frame in an embodiment of this application. For example... Figure 8 As shown, or in some embodiments, the aforementioned levitation rib 113 and the central support plate 112 are made of the same metal material. Therefore, when manufacturing the electronic device, the levitation rib 113 and the central support plate 112 can be manufactured using the same process. For example, the levitation rib 113 and the central support plate 112 can be integrally formed, connected by a second connector 18. After the frame 111 and the central support plate 112 are fixedly connected, for example, by connecting the frame 111 and the central support plate 112 through a plastic part 16, the levitation rib 113 can be located within the plastic part 16. Then, the second connector 18 between the levitation rib 113 and the frame 111 can be removed, thus disconnecting the levitation rib 113 and the central support plate 112. This simplifies the manufacturing process of the levitation rib 113, and consequently simplifies the manufacturing process of the electronic device.
[0066] It is worth noting that the metal material in the embodiments of this application includes two dimensions: metal composition and processing technology. Different metal materials can be understood as at least one of the aforementioned metal composition and processing technology being different. For example, it can be understood as different metal compositions, such as aluminum and titanium being different metal materials, and aluminum and titanium alloys also being different metal materials; or, it can also be understood as different processing technologies, or different surface states, such as profile aluminum and die-cast aluminum being different metal materials.
[0067] Therefore, the frame 111 of the electronic device provided in this application, while having a slot 1111, also possesses strong structural strength, making the electronic device less prone to reliability issues such as cracking or poor airtightness. Furthermore, the floating rib 113 has a minimal negative impact on antenna performance, which is beneficial for improving the communication capabilities of the electronic device. In addition, the different structures of the frame 111 and the central support plate 112 of the electronic device help reduce the cost of the electronic device. The fact that the floating rib 113 is made of the same metal material as the frame 111 or the central support plate 112 simplifies the manufacturing process of the electronic device.
[0068] In some embodiments, the frame 111 of the electronic device includes multiple slits 1111, so that each slit 1111 is provided with a corresponding floating rib 113 to ensure the overall strength of the device. Alternatively, some of the slits 1111 may be provided with floating ribs 113. For example, if the width dimension of the electronic device is smaller than its length dimension, the frame 111 in the width direction is shorter, and the impact of providing slits 1111 on the overall rigidity of the device is relatively small. Therefore, the slits 1111 in the width direction of the frame 111 may not be provided with floating ribs 113. However, if the frame 111 in the length direction of the electronic device is longer, the impact of providing slits 1111 on the overall rigidity of the device is relatively larger, and the number of slits 1111 may be increased. Therefore, the slits 1111 in the length direction of the frame 111 may be provided with floating ribs 113. Alternatively, the choice of whether to install the floating ribs 113 can be made based on the size of the slit 1111, the location and density of the slit 1111. For example, floating ribs 113 are installed in locations with larger slit sizes, in areas with higher slit densities, and in areas where the slits 1111 are located with lower strength, etc.
[0069] The connection between the frame 111 and the middle support plate 112 can be achieved by welding. This results in a high degree of reliability in the connection between the frame 111 and the middle support plate 112. Furthermore, the welding process between the frame 111 and the middle support plate 112 is relatively simple. In the actual manufacturing process of electronic devices, after welding the frame 111 and the middle support plate 112, insulating components such as injection-molded parts are placed between the frame 111 and the middle support plate 112 using processes such as nano-injection molding to connect them.
[0070] In some embodiments, the frame 111 forms the radiator of the frame antenna. When the frame 111 and the middle support plate 112 are welded together, the grounding end of the radiator can be welded to the middle support plate 112, thereby grounding the radiator of the antenna using the middle support plate 112. Thus, while the frame 111 and the middle support plate 112 are fixedly connected, the radiator of the antenna is grounded, which helps to simplify the structure of the electronic device.
[0071] Figure 9 This is a partial cross-sectional view of the middle frame in an embodiment of this application, as shown below. Figure 9 As shown, in some embodiments, the suspended rib 113 extends along the extension direction X of the adjacent frame 111. The length a of the cross-section of at least a portion of the suspended rib 113 along the first direction Y and the length b of the cross-section along the second direction Z satisfy: a ≥ 1 mm, b ≥ 1 mm, the cross-section is perpendicular to the extension direction X, and the first direction Y and the second direction Z are perpendicular. In some embodiments, the first direction Y, the second direction Z, and the extension direction X are all perpendicular to each other. It is understood that if the suspended rib 113 extends along the extension direction X of the adjacent frame 111, then the maximum dimension of the suspended rib 113 along the extension direction X is greater than the maximum dimension of the suspended rib 113 along the first direction Y, and the maximum dimension of the suspended rib 113 along the extension direction X is greater than the maximum dimension of the suspended rib 113 along the second direction Z.
[0072] In this embodiment, the length 'a' of the cross-section of at least a portion of the suspended rib 113 along the first direction Y satisfies a ≥ 1 mm, thereby giving the suspended rib 113 strong strength along the first direction Y. This helps to improve the strength of the electronic device in the first direction Y and meets the reliability requirements of the electronic device. For example, in some embodiments, the length 'a' of the cross-section of at least a portion of the suspended rib 113 along the first direction Y is 1.2 mm, 1.5 mm, 1.5 mm, 1.6 mm, 18 mm, 2 mm, 2.2 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.2 mm, 4.5 mm, 4.6 mm, 5 mm, 5.1 mm, 5.3 mm, 5.5 mm, 5.7 mm, 6 mm, 6.5 mm, 6.8 mm, 7 mm, or 8 mm, etc.
[0073] Similarly, the length b of the cross-section of at least a portion of the levitation rib 113 along the second direction Z satisfies b ≥ 1 mm, giving the levitation rib 113 strong strength along the second direction Z. This helps improve the strength of the electronic device in the second direction Z, meeting the reliability requirements of the electronic device. The length b of the cross-section of at least a portion of the levitation rib 113 along the second direction Z is 1.2 mm, 1.5 mm, 1.5 mm, 1.6 mm, 18 mm, 2 mm, 2.2 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, 3.2 mm, 3.5 mm, 3.7 mm, 4 mm, 4.2 mm, 4.5 mm, 4.6 mm, 5 mm, 5.1 mm, 5.3 mm, 5.5 mm, 5.7 mm, 6 mm, 6.5 mm, 6.8 mm, 7 mm, or 8 mm, etc.
[0074] Please continue to refer to this. Figure 9 In some embodiments, the cross-sectional area of at least a portion of the suspended rib 113 may be greater than or equal to 1 square millimeter, and the cross-section is perpendicular to the extension direction X. In this embodiment, the larger cross-section of the suspended rib 113 is beneficial for giving the suspended rib 113 greater strength, thereby improving the strength of the slot 1111 area of the frame 111 of the electronic device and improving the reliability of the electronic device. In an optional embodiment, the cross-sectional area of at least a portion of the suspended rib 113 is 1.4 mm². 2 1.6mm 2 1.8mm 2 2mm 2 2.2mm 2 2.5mm 2 2.6mm 2 3mm 2 3.4mm 2 3.5mm 2 3.8mm 2 4mm 2 4.5mm 2 4.8mm 2 5mm 2 5.2mm 2 5.5mm 2 5.8mm 2 6mm 2 6.5mm 2 7mm 2 7.4mm 2 8mm 2 9mm 2 10mm 2 Or 12mm 2 etc.
[0075] In the above embodiments, at least a portion of the suspended rib 113 may refer to the area where the suspended rib 113 is directly opposite the opening 1111 of the frame 111, thereby specifically improving the strength of the opening 1111 area of the frame 111.
[0076] Figure 10 This is a partial structural diagram of the middle frame in an embodiment of this application, such as... Figure 10 As shown, in some embodiments, the aforementioned suspended rib 113 extends along the extension direction X of the adjacent frame 111. For ease of description, the two ends of the aforementioned suspended rib 113 along the extension direction X are respectively the first end 1131 and the second end 1132. The end faces of the frame 111 facing the slot 1111 are respectively the first end face 1112 and the second end face 1113. Specifically, the slot 1111 breaks the frame 111, so that the frame 111 has two end faces, namely the first end face 1112 and the second end face 1113. The first end 1131 of the aforementioned suspended rib 113 is located on the side of the first end face 1112 away from the second end face 1113, and the second end 1132 is located on the side of the second end face 1113 away from the first end face 1112. Thus, along the aforementioned extension direction X, the suspended rib 113 completely covers the area of the slot 1111, which is beneficial to improving the structural strength of the frame 111 near the slot 1111. The distance L1 between the first end 1131 and the first end face 1112 along the extension direction X, and the distance L2 between the second end 1132 and the second end face 1113 along the extension direction X, satisfy: |L1-L2|≤5%*L1. To ensure the suspended ribs 113 provide better support and improve structural strength, while ensuring they cover the opening 1111, the length of the suspended ribs 113 along the aforementioned extension direction X is greater than the size of the opening 1111, and the suspended ribs 113 are relatively symmetrically arranged relative to the opening 1111. Therefore, when the frame 111 is subjected to external forces, the forces acting on the suspended ribs 113 are more symmetrical and uniform, and the two sides of the opening 1111 can receive relatively symmetrical reverse forces from the suspended ribs 113, which is beneficial for improving the protective effect on the frame 111. Furthermore, the aforementioned |L1-L2|≤5%*L1 allows for greater tolerance in the fabrication process of the suspended ribs 113, reducing the precision requirements for their fabrication.
[0077] In a further embodiment, the distance L1 between the first end 1131 and the first end face 1112 along the extension direction X, and the distance L2 between the second end 1132 and the second end face 1113 along the extension direction X, can satisfy: L1 = L2. This ensures that the distance from the first end 1131 to the first end face 1112 is the same as the distance from the second end 1132 to the second end face 1113. When the frame 111 is subjected to external forces, the forces on the suspended ribs 113 are more symmetrical and uniform. The opposing forces from the suspended ribs 113 can be symmetrically distributed on both sides of the opening 1111, which further enhances the protective effect on the frame 111.
[0078] Please continue to refer to this. Figure 10 In some embodiments, the aforementioned suspended rib 113 extends along the extension direction X of the adjacent frame 111, and the length L of the suspended rib 113 along the extension direction X is greater than or equal to 14mm. In this embodiment, the length of the suspended rib 113 can provide a strong protective effect for the area of the frame 111 with the slot 1111. The suspended rib extending along the extension direction X of the frame 111 can cover the area of the frame 111 with the slot 1111 on a larger scale, which is beneficial to improving the strength of the area of the frame 111 with the slot 1111 and improving the structural reliability of the whole machine. The larger the size of the suspended rib 113 along the extension direction X, the stronger the protective effect on the frame 111, but of course, the more space it occupies. In some embodiments, the length L of the aforementioned suspended rib 113 along the extension direction X can be 15mm, 18mm, 19mm, 20mm, 21mm, 22mm, 25mm, 56mm, 30mm, 31mm, 35mm or 40mm, etc.
[0079] Regarding the selection of specific metal materials for the frame 111 and the middle support plate 112, this application can provide several possible options. For example, in some embodiments, the frame 111 is a profile aluminum frame, and the middle support plate 112 is a die-cast aluminum middle support plate. That is, both the frame 111 and the middle support plate 112 are aluminum products, but the manufacturing processes are different, resulting in different surface states and manufacturing costs for profile aluminum and die-cast aluminum. Therefore, when the floating rib 113 is made of the same metal material as the frame 111, the floating rib 113 is a profile aluminum floating rib; when the floating rib 113 is made of the same metal material as the middle support plate 112, the floating rib 113 is a die-cast aluminum floating rib.
[0080] In some embodiments, the frame 111 is a titanium alloy frame, and the middle support plate 112 is a profiled aluminum middle support plate. Specifically, the aforementioned titanium alloy frame can also be a profiled titanium alloy frame. When the floating rib 113 and the frame 111 are made of the same metal material, the floating rib 113 is a titanium alloy floating rib; when the floating rib 113 and the middle support plate 112 are made of the same metal material, the floating rib 113 is a profiled aluminum floating rib.
[0081] In some embodiments, the frame 111 is a titanium alloy frame, and the middle support plate 112 is a die-cast aluminum middle support plate. Specifically, the aforementioned titanium alloy frame can also be a profile titanium alloy frame. When the floating rib 113 and the frame 111 are made of the same metal material, the floating rib 113 is a titanium alloy floating rib; when the floating rib 113 and the middle support plate 112 are made of the same metal material, the floating rib 113 is a die-cast aluminum floating rib.
[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A middle frame, characterized in that, It includes a frame, a central support plate, and a suspension rib. The frame is fixed to the periphery of the central support plate, and the frame and the central support plate are made of different metal materials. The frame includes a slit, the suspended rib is located on the side of the frame facing the middle support plate in the area of the slit, and the suspended rib is insulated from the frame and the middle support plate respectively; The suspended ribs are made of the same metal material as the frame, or the suspended ribs are made of the same metal material as the middle support plate.
2. The middle frame as described in claim 1, characterized in that, The frame and the middle support plate are welded together.
3. The middle frame as described in claim 2, characterized in that, The frame forms the radiator of the frame antenna, and the grounding end of the radiator is welded to the middle support plate.
4. The middle frame as described in any one of claims 1 to 3, characterized in that, The suspended rib extends along the extension direction of the adjacent frame, and the cross-sectional area of at least a portion of the suspended rib is greater than or equal to 1 square millimeter, and the cross-section is perpendicular to the extension direction.
5. The middle frame as described in any one of claims 1 to 4, characterized in that, The suspended rib extends along the extension direction of the adjacent frame, and the length a of the cross section of at least a portion of the suspended rib along the first direction and the length b of the cross section along the second direction satisfy: a≥1mm, b≥1mm, the cross section is perpendicular to the extension direction, and the first direction and the second direction are perpendicular.
6. The middle frame as described in any one of claims 1 to 5, characterized in that, The suspended rib extends along the extension direction of the adjacent frame, and the two ends of the suspended rib along the extension direction are the first end and the second end, respectively; the end faces of the frame facing the opening are the first end face and the second end face, respectively. The first end is located on the side of the first end face away from the second end face, and the second end is located on the side of the second end face away from the first end face. The distance L1 between the first end and the first end face along the extension direction and the distance L2 between the second end and the second end face along the extension direction satisfy: |L1-L2|≤5%*L1.
7. The middle frame as described in claim 6, characterized in that, The distance L1 between the first end and the first end face along the extension direction and the distance L2 between the second end and the second end face along the extension direction satisfy: L1 = L2.
8. The middle frame as described in any one of claims 1 to 7, characterized in that, The suspended rib extends along the extension direction of the adjacent frame, and the length of the suspended rib along the extension direction is greater than or equal to 14 mm.
9. The middle frame as described in any one of claims 1 to 8, characterized in that, The frame is a profiled aluminum frame, and the central support plate is a die-cast aluminum central support plate; or... The frame is a titanium alloy frame, and the central support plate is a profiled aluminum central support plate; or... The frame is a titanium alloy frame, and the middle support plate is a die-cast aluminum middle support plate.
10. An electronic device, characterized in that, It includes a back cover and a middle frame as described in any one of claims 1 to 9, wherein the back cover and the middle frame are fixedly connected.