Foldable electronic device

Abstract

The invention discloses a foldable electronic device, relates to the technical field of electronic products, and can reduce the length and occupied space of an electric connector. The foldable electronic equipment comprises a supporting device and a first flexible circuit board, the supporting device comprises a first main body part, a second main body part and a folding mechanism, the folding mechanism is connected between the first main body part and the second main body part, and the supporting device can be switched between an unfolded state and a folded state; the folding mechanism comprises a base and a first supporting piece, and the first supporting piece can rotate relative to the base; the first main body part comprises a first structural part, and the second main body part comprises a second structural part; the two ends of the first flexible circuit board are electrically connected to the first structural member and the second structural member respectively; the first flexible circuit board comprises a first section, and the first section is fixed to the first supporting piece or can be in sliding fit with the first supporting piece.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, and more particularly to a foldable electronic device. Background Technology

[0002] Currently, to address the issues of large size and inconvenience in carrying traditional candybar devices, foldable electronic devices have emerged. Foldable electronic devices typically include a first main body, a second main body, and a folding mechanism connecting the first and second main bodies. This folding mechanism enables relative or synchronous movement between the first and second main bodies, allowing the foldable electronic device to switch between an unfolded and folded state.

[0003] Due to requirements for communication, power supply, and grounding, the first structural component in the first main body and the second structural component in the second main body need to be electrically connected via electrical connectors. However, electrical connectors in related technologies suffer from problems such as long length and large space occupation. Summary of the Invention

[0004] This application provides a foldable electronic device that can reduce the length and space occupied by electrical connectors.

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

[0006] This application provides a foldable electronic device, which includes a support device and a first flexible circuit board. The support device includes a first main body, a second main body, and a folding mechanism. The folding mechanism is connected between the first main body and the second main body, and the support device can switch between an unfolded state and a folded state. The folding mechanism includes a base and a first support member, which can rotate relative to the base. The first main body includes a first structural member, and the second main body includes a second structural member. The two ends of the first flexible circuit board are electrically connected to the first structural member and the second structural member, respectively. The first flexible circuit board includes a first segment, which is fixed to the first support member or can slide with the first support member.

[0007] Because the first support member is positioned close to the foldable screen, the distance between the first support member and the foldable screen is relatively small. By fixing the first section to the first support member or allowing the first section to slide against the first support member, the distance between the first section and the foldable screen can be reduced. This makes the bending radius of the first flexible circuit board closer to that of the foldable screen. On the one hand, this helps to reduce the overall length of the first flexible circuit board, and a small redundancy is sufficient to meet the bending requirements of the first flexible circuit board. This, in turn, helps to reduce the resistance and insertion loss of the first flexible circuit board, thereby reducing impedance fluctuations, improving insertion loss consistency, increasing battery charging efficiency, and reducing grounding impedance. On the other hand, it helps to reduce the space occupied by the first flexible circuit board, which is conducive to the thin design of foldable electronic devices and optimizes the overall layout of foldable electronic devices.

[0008] In one possible implementation, the first flexible circuit board includes a first redundant segment connected to a first section; the base includes an intermediate support member, and when the support device is in the unfolded state, there is a first gap between the first support member and the intermediate support member, and the orthographic projection of the first redundant segment on the first plane overlaps with the orthographic projection of the first gap in the first plane, and the first redundant segment can deform when the support device switches between the unfolded state and the folded state; wherein, the first plane is perpendicular to the thickness direction of the base.

[0009] In this way, the deformation of the first redundant segment can adapt to changes in the size of the gap between the first support and the intermediate support, allowing the first flexible circuit board to better adapt to the size changes of the foldable electronic device in different configurations. This helps to prevent the first flexible circuit board from breaking, thereby improving its reliability. Simultaneously, during the transition between the unfolded and folded states of the foldable electronic device, the first redundant segment can also swing and bend relative to the base to adapt to the shape changes of the foldable electronic device.

[0010] In one possible implementation, the first redundant segment comprises multiple layers of flexible panels stacked together, with air gaps between adjacent layers. That is, no adhesive layer is provided between adjacent flexible panels in the first redundant segment. The air gaps provide sufficient deformation space, making the first redundant segment easier to bend.

[0011] In one possible implementation, the first segment comprises multiple layers of flexible boards stacked together, with an adhesive layer between adjacent flexible boards. This helps reduce the redundant length of the first flexible circuit board, thereby reducing impedance fluctuations and improving insertion loss consistency.

[0012] In one possible implementation, the first flexible circuit board includes a second segment and a second redundant segment. The second segment is electrically connected to the first structural member, and the second redundant segment is connected between the second segment and the first segment. When the foldable electronic device is in the unfolded state, there is a second gap between the end of the first support member away from the second main body and the first main body. The orthographic projection of the second redundant segment on the first plane overlaps with the orthographic projection of the second gap in the first plane. When the support device switches between the unfolded state and the folded state, the second redundant segment can deform. The first plane is perpendicular to the thickness direction of the base.

[0013] In this way, the deformation of the second redundant section can adapt to the size change of the gap between the first main body and the intermediate support, which helps to avoid the first flexible circuit board from breaking and thus improves the reliability of the first flexible circuit board.

[0014] In one possible implementation, the foldable electronic device includes a foldable screen disposed on a supporting device; a first main body has a first groove, the first groove including a first groove sidewall, the first groove sidewall facing the second main body when the supporting device is in the unfolded state; the first main body also has a first clearance groove, the first clearance groove penetrating the first groove sidewall and the surface of the first main body facing the foldable screen, the first clearance groove forming at least a partial second gap. This facilitates the formation of a second gap between the first main body and the first supporting member, ensuring the redundant length of the second redundant segment, thereby ensuring the deformation space of the second redundant segment.

[0015] In one possible implementation, the first groove sidewall includes a first region and a second region arranged in a first direction. When the foldable electronic device is in the unfolded state, the first region is recessed relative to the second region in a direction away from the first support member to form a first clearance groove, wherein the first direction is parallel to the axis of rotation of the first main body relative to the second main body. This allows for the formation of a second gap between the first main body and the first support member, while simultaneously reducing the gap between the second region and the first outer side surface. It also reduces the gap in the support device relative to the folding screen, thereby improving the impact resistance of the folding screen, preventing bright spots on the folding screen, improving the flatness of the folding screen in the unfolded state, reducing screen glare, and minimizing creases that occur during folding.

[0016] In one possible implementation, the foldable electronic device includes a foldable screen disposed on a supporting device, with a first space between the foldable screen and the supporting device, and at least a portion of a first flexible circuit board disposed within the first space. This approach, on the one hand, further reduces the distance between the first flexible circuit board and the foldable screen, thereby reducing the overall length and redundant length of the first flexible circuit board, which in turn reduces the resistance and impedance fluctuations of the first flexible circuit board, thus reducing grounding impedance, improving battery charging efficiency, and reducing insertion loss while improving insertion loss consistency. On the other hand, it fully utilizes the space between the foldable screen and the supporting device, preventing the first flexible circuit board from occupying the internal space of the supporting device. This not only optimizes the structural layout of the foldable electronic device but also makes its structure more compact, reducing its overall thickness and facilitating a thinner design.

[0017] In one possible implementation, the first segment, the first intermediate segment, and the third segment are all located within the first space. This avoids the first flexible circuit board occupying the internal space of the folding mechanism, prevents interference between the first segment and other structures of the folding mechanism (such as the swing arm), and frees the width of the first flexible circuit board from being limited by the length of the folding mechanism (i.e., the dimension of the folding mechanism in the Y-axis direction). This allows for an increase in the width of the first flexible circuit board, thereby reducing its resistance and facilitating the design of multiple transmission lines, making the design of the first flexible circuit board more flexible. Furthermore, it helps reduce the volume of the folding mechanism and optimize its structural layout, thus improving its reliability. Additionally, by placing the first segment and the first intermediate segment on the same side of the thickness direction of the intermediate support member, the first flexible circuit board does not need to pass through the first gap between the first support member and the intermediate support member, nor the third gap between the second support member and the intermediate support member. This reduces the assembly difficulty of the first flexible circuit board, thereby improving its assembly efficiency and yield.

[0018] In one possible implementation, the foldable electronic device includes a support sheet stacked on the side of the folding mechanism near the folding screen, and at least a portion of the support sheet is fixed to the folding mechanism; a portion of the first flexible circuit board is disposed between the folding mechanism and the support sheet.

[0019] In this way, the support plate can support the parts of the foldable screen opposite to the first and third gaps, improving the impact resistance of the foldable screen, preventing bright spots, and enhancing its flatness in the unfolded state. This helps reduce screen glare and creases during folding. Simultaneously, the support plate separates the first flexible circuit board from the support structure within the foldable screen, effectively preventing the first flexible circuit board from pressing against or constricting the screen during folding or unfolding, reducing the risk of arching during bending. It also prevents the first flexible circuit board from getting stuck in the cutouts in the support structure, improving its reliability and consequently enhancing the stability and reliability of signal transmission between the first and second circuit boards.

[0020] In one possible implementation, the support piece is an insulating element, or the surface of the support piece facing away from the folding screen has an insulating layer.

[0021] In one possible implementation, the folding mechanism includes a shaft cover and an intermediate support member. At least a portion of the shaft cover is located on one side of the intermediate support member in the thickness direction. The first flexible circuit board includes a first intermediate segment whose orthographic projection on a first plane overlaps with the orthographic projection of the intermediate support member on the same first plane. The first plane is perpendicular to the thickness direction of the base. This reduces signal interference from the support sheet in the first flexible circuit board.

[0022] In one possible implementation, at least a portion of the first intermediate segment is fixed to the base. This has two advantages: firstly, it helps reduce the redundant length of the first flexible circuit board, thereby reducing impedance fluctuations and improving insertion loss consistency; secondly, it also helps control the bending path and bending shape of the first flexible circuit board, thus reducing the space occupied by the first flexible circuit board.

[0023] In one possible implementation, the first intermediate section can deform as the support device switches between an unfolded and folded state. This allows the first flexible circuit board to better adapt to the dimensional changes of the foldable electronic device in different states.

[0024] In one possible implementation, at least a portion of the first intermediate section arches towards the shaft cover. This increases the length of the first intermediate section, ensuring sufficient deformation space for the first flexible circuit board.

[0025] In one possible implementation, the first intermediate section is located on the side of the intermediate support member facing away from the shaft cover. The intermediate support member has a receiving groove recessed towards the shaft cover. When the support device is in the unfolded state, at least a portion of the first flexible circuit board is located within the receiving groove. This provides two advantages: First, when the foldable electronic device is in the unfolded state, the receiving groove can accommodate the first intermediate section, ensuring its redundant length and preventing it from being compressed due to insufficient space. This reduces stress on the first intermediate section and improves the reliability of the first flexible circuit board. Second, when the foldable electronic device is in the folded state, the receiving groove can also be used to avoid interference with the folding screen, support sheet, and other structures, preventing the intermediate support member from compressing the folding screen and further improving the reliability of the folding screen.

[0026] In one possible implementation, the foldable electronic device includes a foldable screen disposed on a supporting device; a first section is located on the side of a first supporting member near the foldable screen, and a first intermediate section is located on the side of an intermediate supporting member near the foldable screen; or, the first section is located on the side of the first supporting member opposite to the foldable screen, and the first intermediate section is located on the side of the intermediate supporting member opposite to the foldable screen. In this way, the first flexible circuit board does not need to pass through the gap between the first supporting member and the intermediate supporting member, which helps reduce the assembly difficulty of the first flexible circuit board, thereby improving the assembly efficiency and yield of the first flexible circuit board.

[0027] In one possible implementation, the foldable electronic device includes a foldable screen disposed on a supporting device; a first flexible circuit board includes a second segment electrically connected to a first structural member, the second segment being located on the side of the first main body near the foldable screen, and the first segment being located on the side of the first supporting member near the foldable screen. In this way, the first flexible circuit board does not need to pass through a third gap between the first supporting member and the first main body, which helps reduce the assembly difficulty of the first flexible circuit board, thereby improving the assembly efficiency and yield of the first flexible circuit board.

[0028] In one possible implementation, the first support member has a first recessed groove that penetrates one side surface of the first support member in the thickness direction, and the first section is disposed within the first recessed groove. This has several advantages: firstly, it reduces the superimposed thickness between the first section and the first support member, which helps reduce the overall thickness of the foldable electronic device and facilitates a thinner design; secondly, it expands the assembly space of the first section, allowing for more flexible thickness selection; thirdly, it increases the spacing between the first flexible circuit board and metal structural components such as the support sheet and support structure, thereby reducing interference from these components to the signals of the first flexible circuit board; and fourthly, during assembly, the first recessed groove helps position the first flexible circuit board, reducing the assembly difficulty.

[0029] In one possible implementation, the first support member includes a first outer side and a first inner side facing away from each other. When the support device is in the deployed state, the first inner side faces the second main body, and the first recess extends through the first outer side and the first inner side. This facilitates the assembly of the first section into the first recess and reduces the assembly difficulty of the first section.

[0030] In one possible implementation, the first support member has a first through hole that penetrates both sides of the first support member in the thickness direction, and the first section passes through the first through hole. Another connection method between the first section and the first support member is also provided.

[0031] In one possible implementation, the first structural component is a first circuit board, and the second structural component is a second circuit board; the first main body includes a first housing, the first housing having a first receiving cavity, and the first circuit board disposed within the first receiving cavity. A specific application scenario for the first flexible circuit board is provided.

[0032] In one possible implementation, the foldable electronic device includes a second flexible circuit board, with its two ends electrically connected to a first circuit board and a second circuit board, respectively. One of the first and second flexible circuit boards is used to transmit radio frequency (RF) signals, while the other can be used to transmit non-RF signals. By providing two independent electrical connections—the first and second flexible circuit boards—RF and non-RF signals can be designed separately, which improves signal isolation, avoids interference between RF and non-RF signals, and enhances the anti-interference performance of the foldable electronic device.

[0033] In one possible implementation, the first flexible circuit board and the second flexible circuit board are spaced apart in a first direction, which is parallel to the axis of rotation of the first main body relative to the second main body. This allows the first and second flexible circuit boards to form spatial isolation in the first direction, further improving the isolation between radio frequency (RF) signals and non-RF signals.

[0034] In one possible implementation, at least a portion of the first flexible circuit board and the second flexible circuit board are spaced apart in the thickness direction of the base. This allows the first and second flexible circuit boards to form spatial isolation in the thickness direction of the first flexible circuit board, further improving the isolation effect between radio frequency (RF) signals and non-RF signals.

[0035] In one possible implementation, the second flexible circuit board includes a first connecting segment, with the first segment and the first connecting segment located on opposite sides of the thickness direction of the first support member.

[0036] In one possible implementation, the first housing has a first through hole and a second through hole. A first flexible circuit board passes through the first through hole and is electrically connected to the first circuit board, and a second flexible circuit board passes through the second through hole and is electrically connected to the first circuit board. The first and second through holes are located on two different walls of the first main body. This helps to reduce the size of the first and second through holes, thereby improving the structural strength of the first housing.

[0037] In one possible implementation, the first structural component is a first ground metal, and the second structural component is a second ground metal. Another specific application scenario for the first flexible circuit board is provided. This allows for the formation of a grounding link with low and stable impedance between the first and second ground metals. On the one hand, this effectively improves the antenna's return current, helps reduce harmonic generation, and prevents harmonic fluctuations, thereby effectively suppressing RSE exceedances. Attached Figure Description

[0038] Figure 1a A perspective view of a foldable electronic device in an unfolded state, provided in some embodiments of this application;

[0039] Figure 1b for Figure 1a The diagram shows the structure of the foldable electronic device in its folded state.

[0040] Figure 2 for Figure 1a An exploded view of the foldable electronic device shown.

[0041] Figure 3 This is a partial cross-sectional view of the foldable electronic device shown in Figure 1 at line AA;

[0042] Figure 4 for Figure 3 A partial cross-sectional view of the foldable electronic device in its folded state is shown.

[0043] Figure 5 A schematic diagram of the stacked structure of a flexible circuit board provided in some embodiments of this application;

[0044] Figure 6 This is a schematic diagram illustrating the relationship between the insertion loss of the stripline and the signal frequency in some embodiments of this application;

[0045] Figure 7 A top view of a foldable electronic device is provided for other embodiments of this application;

[0046] Figure 8 Partial cross-sectional view of a foldable electronic device provided for some embodiments of this application;

[0047] Figure 9 for Figure 8 A schematic diagram of the foldable electronic device in its folded state;

[0048] Figure 10a for Figure 8 An enlarged view of the foldable electronic device in region A shown;

[0049] Figure 10b This is a partial structural schematic diagram of a foldable electronic device in some other embodiments of this application;

[0050] Figure 10c for Figure 10b A partial top view of the first support member and the first housing in the unfolded state of the foldable electronic device shown.

[0051] Figure 11 A simplified schematic diagram of a foldable electronic device provided in some embodiments of this application;

[0052] Figure 12 Partial cross-sectional view of a foldable electronic device in an unfolded state, provided for some embodiments of this application;

[0053] Figure 13 for Figure 12 A partial cross-sectional view of the foldable electronic device in its folded state is shown.

[0054] Figure 14 for Figure 12 An assembly perspective view of the support plate, folding mechanism, and first flexible circuit board in the foldable electronic device shown.

[0055] Figure 15 for Figure 14 The assembly solid view shown is a cross-sectional view at line BB;

[0056] Figure 16 for Figure 15 The cross-sectional view of the support sheet, folding mechanism, and first flexible circuit board in the folded state is shown.

[0057] Figure 17 for Figure 12 A perspective view of the folding mechanism in the foldable electronic device shown.

[0058] Figure 18 for Figure 12 A perspective view of the first housing in the foldable electronic device shown;

[0059] Figure 19 A schematic diagram of a foldable electronic device in an unfolded state, provided for some embodiments of this application;

[0060] Figure 20 for Figure 19 A schematic diagram of the foldable electronic device in its folded state;

[0061] Figure 21 Partial cross-sectional view of a foldable electronic device provided for some embodiments of this application;

[0062] Figure 22 for Figure 21 A schematic diagram of the foldable electronic device in its folded state;

[0063] Figure 23 Partial cross-sectional view of a foldable electronic device in an unfolded state, provided for some embodiments of this application;

[0064] Figure 24 for Figure 23 A schematic diagram of the foldable electronic device in its folded state;

[0065] Figures 25-28 These are partial cross-sectional views of the foldable electronic devices provided in some embodiments of this application;

[0066] Figure 29 This is a partial cross-sectional view of the foldable electronic device provided in some embodiments of this application in its unfolded state;

[0067] Figure 30 for Figure 29 A schematic diagram of the foldable electronic device in its folded state;

[0068] Figures 31-32 These are partial cross-sectional views of foldable electronic devices in their unfolded state, provided in some embodiments of this application.

[0069] Figure 33An assembly diagram of the first section and the first support member provided for some embodiments of this application;

[0070] Figure 34 Partial cross-sectional view of a foldable electronic device provided for some embodiments of this application;

[0071] Figure 35 for Figure 34 A top view of the foldable electronic device in its unfolded state;

[0072] Figure 36 Top view of a foldable electronic device in its unfolded state, provided for other embodiments of this application;

[0073] Figure 37 A partial cross-sectional view of a foldable electronic device provided for some embodiments of this application.

[0074] Figure label:

[0075] 100 foldable electronic devices;

[0076] Foldable screen 10; First display section 11; Second display section 12; Third display section 13; Display screen 101; Support structure 102; Hole K1;

[0077] Support device 20;

[0078] First main body 201; First shell 21; First middle frame 211; First middle plate 2111; First side frame 2112; First back cover 212; First receiving cavity Q1; First groove C1; First groove bottom wall C11; First groove side wall C12; First clearance groove C120; First area C121; Second area C122; First bearing surface a1; First side wall surface a2; First through hole K3;

[0079] Second main body 202; second shell 22; second middle frame 221; second back cover 222; second receiving cavity Q2; second groove C2; ​​second groove bottom wall C21; second bearing surface b1; second side wall surface b2;

[0080] Folding mechanism 23; base 230; shaft cover 2301; bottom plate 2301a; side plate 2301b; intermediate support member 2302; second support surface n1; second bottom surface n2; first support member 231; first outer surface m1; first inner surface m2; first top surface m3; first bottom surface m4; first through hole 231a; limiting groove 231b; second support member 232; first gap J1; second gap J2; third gap J3; fourth gap J4;

[0081] First circuit board 31; RF chip 31a; Second circuit board 32; RF front-end module 32a;

[0082] Electrical connector 301; Non-redundant part 3011; Redundant part 3012;

[0083] First flexible plate B1; First coating layer B11; First adhesive layer B12; First metal layer B13; First dielectric layer B14; Second flexible plate B2; Second coating layer B21; Second adhesive layer B22; Second metal layer B23; Second dielectric layer B24; Third flexible plate B3; Third coating layer B31; Third adhesive layer B32; Third metal layer B33; Third dielectric layer B34; Air gap K2; Adhesive layer B4;

[0084] First flexible circuit board 33; First segment 331; Second segment 332; Third segment 333; Fourth segment 334; First intermediate segment 335; First redundant segment 336; Second redundant segment 337; Third redundant segment 338; Fourth redundant segment 339;

[0085] Second flexible circuit board 34; First connecting segment 341; Second connecting segment 342; Second intermediate segment 343;

[0086] First Space Q3;

[0087] Support plate 40; Wear-resistant layer 50;

[0088] First settling groove C3; Second settling groove C4; Third settling groove C5; Fourth settling groove C6; Receiving groove C8; Second through hole K5. Detailed Implementation

[0089] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0090] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0091] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0092] In the description of the embodiments of this application, "and / or" is merely a way of describing the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0093] In the embodiments of this application, directional terms such as "lateral", "longitudinal", "up", "down", "top", and "bottom" may be defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0094] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection. "Relatively fixed" means that the relative positional relationship between the two parts remains unchanged.

[0095] In the description of embodiments of this application, the terms "vertical" and "parallel" include the described situation and situations that are similar to the described situation, where the range of similar situations is within an acceptable deviation range. For example, "parallel" includes absolute parallelism and approximately parallelism, wherein the acceptable deviation range for approximately parallelism may be, for example, within 15°; "vertical" includes absolute verticalism and approximately verticalism, wherein the acceptable deviation range for approximately verticalism may also be, for example, within 15°.

[0096] To facilitate understanding, before providing a detailed description of the foldable electronic device in the embodiments of this application, the relevant terms involved in the embodiments of this application will be explained first.

[0097] MIPI: Mobile Industry Processor Interface, is an open standard and specification for mobile application processors initiated by the MIPI Alliance.

[0098] Insertion loss refers to the amount of signal strength reduction that occurs after a signal passes through a device or component during transmission. Insertion loss is a crucial indicator for evaluating the performance of components in a communication system, directly impacting transmission distance and overall system performance. Lower insertion loss results in higher signal transmission efficiency and longer transmission distances.

[0099] Isolation: In communication systems, isolation refers to the degree of separation between signals from each channel. A high isolation value can effectively prevent crosstalk between signals, which can lead to transmission signal distortion. There is a certain relationship between isolation and insertion loss; high isolation helps reduce insertion loss.

[0100] This application provides a foldable electronic device, which may include a first main body, a second main body, and a folding mechanism. The folding mechanism is used to realize the relative or synchronous movement of the first main body and the second main body, so that the foldable electronic device can switch between an unfolded state and a folded state. The relative movement between the first main body and the second main body includes relative rotation, relative sliding, etc., and the synchronous movement between the first main body and the second main body includes synchronous rotation, synchronous sliding, etc.

[0101] Specifically, foldable electronic devices have at least two states: an unfolded state and a folded state. In some cases, foldable electronic devices may further include an intermediate state. This intermediate state can be any one or more states between the unfolded and folded states. Users can switch the foldable electronic device to different states to meet different usage needs.

[0102] The foldable electronic device in this embodiment of the application, by setting a first flexible circuit board, and electrically connecting the two ends of the first flexible circuit board to a first structural member in the first main body and a second structural member in the second main body respectively, can achieve a reliable electrical connection between the first structural member and the second structural member. Simultaneously, by fixing a portion of the first flexible circuit board (e.g., the first segment in this document) to a first support member in the folding mechanism, or by slidingly engaging a portion of the first flexible circuit board with the first support member, it is beneficial to reduce the distance between the first flexible circuit board and the foldable screen, and to reduce the bending radius of the first flexible circuit board when the foldable electronic device is in the folded state. On the one hand, this helps to reduce the overall length and redundant length of the first flexible circuit board, thereby reducing the resistance and impedance fluctuations of the first flexible circuit board, reducing grounding impedance, improving antenna performance and battery charging efficiency, and reducing signal insertion loss and improving insertion loss consistency; on the other hand, it also helps to reduce the space occupied by the first flexible circuit board.

[0103] In some embodiments, the first structural member can be a first circuit board, and the second structural member can be a second circuit board. In this way, the first flexible circuit board can be used to achieve an electrical connection between the first circuit board and the second circuit board. In other embodiments, the first structural member can be a first ground metal, and the second structural member can be a second ground metal. In this way, the first flexible circuit board can be used to achieve an electrical connection between a reference ground in the first main body and a reference ground in the second main body.

[0104] The foldable electronic device in this application embodiment can be a tablet computer, personal digital assistant (PDA), laptop computer, e-reader, handheld device with wireless communication function, computing device, in-vehicle device, wearable device (including but not limited to smartwatches, smart bracelets, etc.), virtual reality (VR) terminal device (e.g., VR glasses), augmented reality (AR) terminal device (e.g., AR glasses), Bluetooth headset, camera, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc., mobile or fixed terminal. This application embodiment does not specifically limit the form of the foldable electronic device.

[0105] Please see Figure 1a , Figure 1a This is a perspective view of a foldable electronic device 100 in its unfolded state, provided in some embodiments of this application. The foldable electronic device 100 includes a foldable screen 10 and a support device 20. In this embodiment, the foldable electronic device 100 is described as a foldable screen device (e.g., a foldable mobile phone). It is understood that in other embodiments, the foldable electronic device 100 may also be a slider phone, a rotating phone, etc.

[0106] in, Figure 1a The foldable electronic device 100 is shown only schematically, and the actual shape, size, position, and construction of these components are not subject to change. Figure 1a Limitations. For example, in some other examples, the foldable electronic device 100 may not include the foldable screen 10.

[0107] The foldable electronic device 100 is approximately rectangular in shape when unfolded. In other embodiments, the foldable electronic device 100 may also be approximately circular, elliptical, or similar in shape when unfolded.

[0108] The foldable screen 10 is used to display images, videos, and other information. Please refer to [link / reference]. Figure 1a The foldable screen 10 includes a first display portion 11, a second display portion 12, and a third display portion 13. The third display portion 13 is connected between the first display portion 11 and the second display portion 12. Figure 1a The first display section 11, the second display section 12, and the third display section 13 are schematically divided using dashed lines. These dashed lines do not actually exist in the foldable screen 10. The same interpretation applies to the dashed lines on other components mentioned later, and they will not be elaborated upon further.

[0109] Please see Figure 1b , Figure 1b for Figure 1a The diagram shows the structure of the foldable electronic device 100 in its folded state, where the foldable screen 10 is also folded. Specifically, when the foldable screen 10 is folded, the first display portion 11 and the second display portion 12 are opposite each other, and the third display portion 13 is bent. At this time, the third display portion 13 can be teardrop-shaped, U-shaped, etc. In this state, the foldable electronic device 100 is small in size and easy to carry.

[0110] It should be noted that, Figure 1b In the illustrated embodiment, when the foldable electronic device 100 is in a folded state, the support device 20 protects the foldable screen 10 from view, and the foldable screen 10 is not visible to the user. In this case, the foldable electronic device 100 is an inward-folding electronic device. In other embodiments, when the foldable electronic device 100 is in a folded state, the foldable screen 10 may also be located outside the support device 20, and the foldable screen 10 is visible to the user. In this case, the foldable electronic device 100 is an outward-folding electronic device.

[0111] Please see Figure 2 and combined Figure 3 , Figure 2 for Figure 1a An exploded view of the foldable electronic device 100 shown. Figure 3 This is a partial cross-sectional view of the foldable electronic device 100 shown in Figure 1 at line AA. In some embodiments, the foldable screen 10 includes a display screen 101 and a support structure 102 stacked together. The first display portion 11, the second display portion 12, and the third display portion 13 of the foldable screen 10 may each include a portion of the display screen 101 and a portion of the support structure 102 opposite to it.

[0112] Specifically, the display screen 101 has a display surface and a non-display surface facing away from each other. The display surface faces away from the support device 20. The support structure 102 is stacked on top of the display screen 101 and can be fixed to the non-display surface of the display screen 101. The support structure 102 is used to increase the overall structural strength of the folding screen 10, and the support structure 102 can be folded together with the display screen 101.

[0113] The support structure 102 can be in the form of a thin sheet. The material of the support structure 102 can be metals such as stainless steel and titanium alloy, or it can be carbon fiber. These materials have a certain degree of hardness and a high elastic modulus, which can improve the hardness and bending resilience of the foldable screen 10. To facilitate the bending of the support structure 102, in some embodiments, please refer to... Figure 3 The support structure 102 in the third display section 13 may be provided with a hollow hole K1.

[0114] Support device 20 is used to support foldable screen 10. (See also...) Figure 2 The support device 20 includes a first main body 201, a second main body 202, and a folding mechanism 23.

[0115] The first main body 201 can be used to support the first display portion 11 of the foldable screen 10. The second main body 202 can be used to support the second display portion 12 of the foldable screen 10. The folding mechanism 23 is connected between the first main body 201 and the second main body 202, and can be used to support the third display portion 13 of the foldable screen 10.

[0116] The first main body 201 and the second main body 202 can rotate relative to each other or synchronously via the folding mechanism 23. Specifically, the folding mechanism 23 can switch between an unfolded state and a folded state, thereby allowing the entire foldable electronic device 100 to switch between these states. When the folding mechanism 23 is in the folded state, the folding screen 10, the support device 20, and the foldable electronic device 100 are also in the folded state. When the folding mechanism 23 is in the unfolded state, the folding screen 10, the support device 20, and the foldable electronic device 100 are also in the unfolded state.

[0117] When the foldable electronic device 100 is a foldable screen device, please refer to Figure 1b When the foldable electronic device 100 is in the folded state, the angle between the first main body 201 and the second main body 202 is approximately 0 degrees. Please refer to... Figure 1aWhen the foldable electronic device 100 is in the unfolded state, the included angle between the first main body portion 201 and the second main body portion 202 can be approximately 180 degrees. It is understood that in other embodiments, when the foldable electronic device 100 is another device, the included angle between the first main body portion 201 and the second main body portion 202 in the unfolded and folded states can also be other angles, and this application does not specifically limit this.

[0118] In this embodiment, the support device 20 includes two main bodies: a first main body 201 and a second main body 202. The support device 20 can be folded once. It is understood that in other embodiments, the support device 20 may also include three, four, or more main bodies. In this case, two adjacent main bodies can be rotatably connected by the folding mechanism 23. Thus, the support device 20 can be folded multiple times (two or more times).

[0119] The first main body 201 may include a first housing 21 and components located within the first housing 21, and the second main body 202 may include a second housing 22 and components located within the second housing 22.

[0120] Please see Figure 3 The first housing 21 may include a first middle frame 211 and a first back cover 212. The first display portion 11 of the foldable screen 10 is supported on the first middle frame 211. Exemplarily, the first middle frame 211 includes a first middle plate 2111 and a first frame 2112. The first frame 2112 may be cylindrical, and the first middle plate 2111 is connected to the inner circumferential surface of the first frame 2112. The first middle plate 2111 and the first frame 2112 may be integrally formed. Alternatively, the first middle plate 2111 and the first frame 2112 may be connected by welding, fasteners, or other methods. Among them, the fasteners described in the embodiments of this application include, but are not limited to, screws, rivets, bolts, etc.

[0121] In some embodiments, the first middle frame 211 can be a metal component. For example, the first middle frame 211 can be an aluminum alloy component, a magnesium alloy component, a stainless steel component, etc. In this way, the first middle frame 211 not only provides rigid support for the components within the first housing 21, but also provides a zero-potential reference for the various electronic devices in the foldable electronic device 100. That is, the first middle frame 2111 can be formed as a first reference ground. Additionally, in this case, one or more slots can be provided on the first frame 2112 to divide the first frame 2112 into multiple antenna radiators. In this way, the first frame 2112 can be reused as an antenna radiator, saving space and cost associated with additional antenna radiators.

[0122] The first back cover 212 is fixedly connected to the side of the first middle frame 211 away from the first display portion 11. A first receiving cavity Q1 can be formed between the first back cover 212 and the first middle frame 211. In some embodiments, the material of the first back cover 212 includes, but is not limited to, metal, plastic, glass, ceramic, etc. It is understood that in other embodiments, when the foldable electronic device 100 is an inward-folding electronic device, the first back cover 212 may also include an additional screen. In this way, when the foldable electronic device 100 is in a folded state, the additional screen in the first back cover 212 can be used as the outer screen of the foldable electronic device 100.

[0123] Please continue reading. Figure 3 The second housing 22 includes a second middle frame 221 and a second back cover 222. The second display portion 12 of the foldable screen 10 is supported on the second middle frame 221. The second back cover 222 is fixedly connected to the side of the second middle frame 221 away from the second display portion 12. A second receiving cavity Q2 is formed between the second middle frame 221 and the second back cover 222. The structure and materials of the second middle frame 221 can be designed with reference to the first middle frame 211. Specifically, the second middle frame 221 can also be a metal part. In this case, the second middle frame 221 can be formed as a second reference ground, and the second frame 221 can be reused as an antenna radiator.

[0124] In some embodiments, please refer to Figure 2 The first main body 201 has a first groove C1 at one end near the second main body 202, and the second main body 202 has a second groove C2 at one end near the first main body 201. For example, the first groove C1 can be formed in the first housing 21, and the second groove C2 can be formed in the second housing 22. Specifically, the first groove C1 can be formed in the first middle frame 211, and the second groove C2 can be formed in the second middle frame 221.

[0125] Please see Figure 2 and combined Figure 3 The first main body 201 includes a first bearing surface a1 and a first side wall surface a2. The second main body 202 includes a second bearing surface b1 and a second side wall surface b2. Both the first bearing surface a1 and the second bearing surface b1 face the foldable screen 10. When the foldable electronic device 100 is in the unfolded state, the first side wall surface a2 faces the second main body 202, and the second side wall surface b2 faces the first main body 201. A first groove C1 penetrates the first bearing surface a1 and the first side wall surface a2, and a second groove C2 penetrates the second bearing surface b1 and the second side wall surface b2.

[0126] Please see Figure 3When the foldable electronic device 100 is in the unfolded state, the first groove C1 and the second groove C2 align to form a receiving space, within which the folding mechanism 23 can be accommodated. Specifically, a portion of the folding mechanism 23 can be located within the first groove C1, and another portion can be located within the second groove C2. This helps to prevent the folding mechanism 23 from being exposed when the foldable electronic device 100 is unfolded, thus improving the aesthetic appearance of the foldable electronic device 100 in the unfolded state.

[0127] Please see Figures 3-4 , Figure 4 for Figure 3 The diagram shows a partial cross-sectional view of the foldable electronic device 100 in its folded state. The folding mechanism 23 includes a base 230, a first support member 231, and a second support member 232. Figure 3 and Figure 4 The folding mechanism 23 is shown only schematically, and the actual shape, size, position, and construction of these components are not subject to change. Figure 3 and Figure 4 The folding mechanism 23 may be subject to limitations. For example, it may also include a swing arm, a synchronization mechanism, a damping mechanism, etc. Alternatively, in other embodiments, the folding mechanism 23 may not include the second support member 232.

[0128] For ease of description in the following embodiments, an XYZ coordinate system is established for the base 230, defining the length direction of the base 230 as the Y-axis, the width direction as the X-axis, and the thickness direction as the Z-axis. It is understood that the coordinate system setting of the foldable electronic device 100 can be flexibly set according to actual needs, and no specific limitations are made here.

[0129] In this embodiment, please refer to Figure 1a and Figure 3 When the foldable electronic device 100 is in its unfolded state, its width direction is parallel to the Y-axis direction and its length direction is parallel to the X-axis direction, allowing it to fold longitudinally. That is, the foldable electronic device 100 in this embodiment is a vertically folding electronic device. It is understood that in other embodiments, the foldable electronic device 100 may also be in its unfolded state with its width direction parallel to the X-axis direction and its length direction parallel to the Y-axis direction, allowing it to fold laterally. In this case, the foldable electronic device 100 is a horizontally folding electronic device.

[0130] In some embodiments, please refer to Figures 3-4The base 230 may include a shaft cover 2301 and an intermediate support 2302. The shaft cover 2301 may serve as an exterior part (i.e., an externally visible component) of the folding mechanism 23. The materials of the shaft cover 2301 include, but are not limited to, metal and plastic.

[0131] Please see Figure 4 The shaft cover 2301 includes a base plate 2301a and a side plate 2301b. The base plate 2301a is generally flat. The side plate 2301b surrounds the outer edge of the base plate 2301a, defining an accommodating space between the side plate 2301b and the base plate 2301a, where other components of the folding mechanism 23 can be accommodated. This allows some components of the folding mechanism 23 to be hidden inside the shaft cover 2301, improving the aesthetic appearance of the foldable electronic device 100.

[0132] An intermediate support member 2302 is disposed on the shaft cover 2301 and can be used to support part of the folding screen 10. The intermediate support member 2302 is generally flat or block-shaped. The material of the intermediate support member 2302 may include at least one of metal, plastic, and amorphous material. The intermediate support member 2302 may include one or more structural components.

[0133] In some embodiments, the intermediate support 2302 and the shaft cover 2301 are separate components. The intermediate support 2302 can move relative to the shaft cover 2301 along the thickness direction of the base 230, or the intermediate support 2302 can be fixed relative to the shaft cover 2301. In other embodiments, the intermediate support 2302 can be integrally formed with the shaft cover 2301.

[0134] The first support member 231 and the second support member 232 are located on opposite sides of the base 230, and both the first support member 231 and the second support member 232 can rotate relative to the base 230 between an unfolded position and a folded position. Both the first support member 231 and the second support member 232 can be generally elongated strip-shaped plates. Specifically, the length direction of both the first support member 231 and the second support member 232 is parallel to the Y-axis. Both the first support member 231 and the second support member 232 can be rotatably connected to the base 230 via a pivot, swing arm, etc., but this embodiment does not specifically limit this connection.

[0135] Please see Figures 3-4 The first groove C1 includes a first groove bottom wall C11 facing the foldable screen 10, and the first support member 231 is opposite to and spaced apart from the first groove bottom wall C11. The second groove C2 includes a second groove bottom wall C21 facing the foldable screen 10, and the second support member 232 is opposite to and spaced apart from the second groove bottom wall C21.

[0136] In some embodiments, please refer to Figure 3When the foldable electronic device 100 is in the unfolded state, both the first support member 231 and the second support member 232 are in the unfolded position. The angle between the surface of the first support member 231 facing the foldable screen 10 and the surface of the intermediate support member 2302 facing the foldable screen 10 (that is, the surface of the base 230 facing the foldable screen 10) is approximately 180°, and the angle between the surface of the second support member 232 facing the foldable screen 10 and the surface of the intermediate support member 2302 facing the foldable screen 10 is also approximately 180°. In this way, when the foldable electronic device 100 is in the unfolded state, the third display portion 13 of the foldable screen 10 can be supported by the first support member 231, the second support member 232, and the intermediate support member 2302. Therefore, the flatness of the third display portion 13 can be ensured when the foldable screen 10 is in the unfolded state.

[0137] Please continue reading. Figure 3 When the foldable electronic device 100 is in the unfolded state, there is a first gap J1 between the intermediate support member 2302 and the first support member 231, and a third gap J3 between the intermediate support member 2302 and the second support member 232. This prevents collisions, friction, or even jamming between the first support member 231 and the intermediate support member 2302, and between the second support member 232 and the intermediate support member 2302, when they rotate between the unfolded and folded positions, ensuring smooth switching of the foldable electronic device 100 between the unfolded and folded states.

[0138] Please see Figure 4 When the foldable electronic device 100 is in the unfolded state, both the first support member 231 and the second support member 232 are in the folded position. The surface of the first support member 231 facing the foldable screen 10 and the surface of the second support member 232 facing the foldable screen 10 are opposite each other. In this way, a space for accommodating the third display portion 13 can be defined between the first support member 231, the second support member 232 and the intermediate support member 2302, thereby limiting the shape of the third display portion 13 of the foldable screen 10 in the folded state.

[0139] In some embodiments, please refer to Figure 3 and combined Figure 4During the transition of the foldable electronic device 100 from its unfolded state to its folded state, the angles at which the first support member 231 rotates relative to the intermediate support member 2302 and the second support member 232 rotate relative to the intermediate support member 2302 are both first angles. The angles at which the first main body portion 201 rotates relative to the base 230 and the second main body portion 202 rotates relative to the base 230 are both second angles, where the first angle is greater than the second angle. For example, the first angle can be greater than 90 degrees, and the second angle can be equal to 90 degrees. This allows the third display portion 13 to be folded into a teardrop shape, which helps reduce the bending radius of the foldable screen 10, thereby reducing the overall thickness of the device.

[0140] It is understood that in some other embodiments, the first angle may also be equal to the second angle. For example, both the first angle and the second angle may be equal to 90 degrees. In this case, the third display portion 13 may be folded into other shapes (e.g., U-shape), which is not specifically limited in this application embodiment.

[0141] Since the bending radius of the foldable electronic device 100 when it is folded is smaller than that of the folding mechanism 23, in order to prevent the third display portion 13 of the foldable screen 10 from being damaged by the pressure of the base 230 during the folding state or folding process, please refer to... Figure 3 and combined Figure 4 When the folding mechanism 23 folds from the unfolded state to the folded state, the first support member 231 and the second support member 232 rotate relative to the base 230 and also move relative to the intermediate support member 2302 in a direction away from the intermediate support member 2302. When the folding mechanism 23 folds from the folded state to the unfolded state, the first support member 231 and the second support member 232 rotate relative to the base 230 and also move relative to the intermediate support member 2302 in a direction closer to the intermediate support member 2302.

[0142] In this way, the size of the folding mechanism 23 can adapt to the shape changes of the third display part 13 during the folding or unfolding process, which can prevent the base 230 from squeezing the third display part 13, thereby effectively reducing the stress on the third display part 13 during the folding process and in the folded state, which is beneficial to improving the reliability of the folding screen 10.

[0143] In some embodiments, please refer to Figures 3-4 The foldable electronic device 100 also includes a first circuit board 31 and a second circuit board 32. The first circuit board 31 is disposed in the first receiving cavity Q1 of the first housing 21, and the second circuit board 32 is disposed in the second receiving cavity Q2 of the second housing 22. In addition, the foldable electronic device 100 may also include a first battery, a second battery, a speaker, a receiver, a microphone, a headphone jack, buttons, a charging interface, etc.

[0144] Both the first circuit board 31 and the second circuit board 32 can be used to house electronic components. These electronic components include, but are not limited to, processors (also known as chips), antenna modules, Bluetooth modules, WiFi modules, GPS modules, charging management modules, screen display and operation modules, resistors, capacitors, inductors, potentiometers, vacuum tubes, electromechanical components, connectors, discrete semiconductor devices, sensors, power supplies, switches, micromotors, electronic transformers, relays, SIM card slots, and Universal Serial Bus (USB) devices.

[0145] Please see Figures 3-4 The foldable electronic device 100 also includes an electrical connector 301. The electrical connector 301 passes through or spans the folding mechanism 23, and can be used to transmit signals such as radio frequency signals and non-radio frequency signals. Among them, non-radio frequency signals include, but are not limited to, hardware signals, MIPI signals (control signals), power signals, and ground signals.

[0146] In some embodiments, the two ends of the electrical connector 301 are electrically connected to the first circuit board 31 and the second circuit board 32, respectively. For example, the electrical connector 301 and the first circuit board 31, as well as the electrical connector 301 and the second circuit board 32, can be electrically connected through connection structures such as board-to-board (BTB) connectors and zero insertion force (ZIF) connector terminals.

[0147] In some embodiments, the electrical connector 301 may be a flexible printed circuit (FPC). See also... Figure 5 , Figure 5 This is a schematic diagram of the stacked structure of a flexible circuit board provided in some embodiments of this application. The flexible circuit board may include a non-redundant portion 3011 and a redundant portion 3012. The non-redundant portion 3011 may be fixed to the base 230. For example, the non-redundant portion 3011 may be fixed to the shaft cover 2301 or the intermediate support member 2302. The redundant portion 3012 is redundantly disposed within the foldable electronic device 100.

[0148] Please see Figure 3 and combined Figure 4When the foldable electronic device 100 switches between an unfolded state and a folded state, the redundant portion 3012 can deform (e.g., bend, stretch, etc.). For example, when the foldable electronic device 100 is in the folded state, the redundant portion 3012 can be stretched, reducing or eliminating the redundancy. In this way, the flexible circuit board can adapt to the shape changes of the foldable electronic device 100 through the deformation of the redundant portion 3012, preventing breakage of the flexible circuit board, meeting the bending requirements of the flexible circuit board, and improving the reliability of the flexible circuit board.

[0149] In some embodiments, the flexible circuit board may include multiple layers of flexible boards stacked together. In this embodiment, the first flexible circuit board 33 comprising three flexible boards is used as an example for illustration, but this should not be construed as a limitation on the embodiments of this application. Please refer to... Figure 5 The three flexible panels are a first flexible panel B1, a second flexible panel B2, and a third flexible panel B3. The second flexible panel B2 is located between the first flexible panel B1 and the third flexible panel B3.

[0150] To ensure the connection between adjacent flexible panels and the bending performance of the flexible circuit board, in some embodiments, please refer to... Figure 5 In the non-redundant section 3011, adjacent flexible plates (i.e., between the first flexible plate B1 and the second flexible plate B2, and between the second flexible plate B2 and the third flexible plate B3) can be bonded together by adhesive layer B4. In the redundant section 3011, adjacent flexible plates form an air gap K2. The air gap K2 provides a certain amount of deformation space, making the flexible circuit board easier to bend. That is, in the redundant section 3012, no adhesive layer B4 is provided between adjacent flexible plates.

[0151] When a flexible circuit board is used to transmit radio frequency signals, the flexible circuit board may include at least one of stripline, coplanar waveguide, microstrip line, and non-planar microstrip line. Figure 5 (a) is a schematic diagram of the layered structure of the strip. For example... Figure 5 As shown in (a), the first flexible plate B1 may include a first coverlay layer B11, a first adhesive layer B12, a first metal layer B13, and a first dielectric layer B14, which are stacked sequentially. The first dielectric layer B14 is located on the side of the first metal layer B13 closer to the second flexible plate B2.

[0152] The first coating layer B11 can be used to prevent the oxidation of the first metal layer B13. The material of the first coating layer B11 may include at least one of polyimide (PI) and polyester (PET). The first metal layer B13 may be a copper layer. The first dielectric layer B14 is used to provide physical support. Both the first metal layer B13 and the first dielectric layer B14 may be provided by a flexible copper clad laminate (FCCL). For example, the thickness of the first coating layer B11 may be 12 μm to 18 μm, the thickness of the first adhesive layer B12 may be 7.5 μm to 10 μm, the thickness of the first metal layer B13 may be 9 μm to 15 μm, and the thickness of the first dielectric layer B14 may be 12 μm to 18 μm.

[0153] The second flexible plate B2 includes a second coating layer B21, a second adhesive layer B22, a second metal layer B23, and a second dielectric layer B24, which are stacked sequentially. The second dielectric layer B24 is located on the side of the second metal layer B23 closest to the third flexible plate B3. The third flexible plate B3 includes a third dielectric layer B34, a third metal layer B33, a third adhesive layer B32, and a third coating layer B31, which are stacked sequentially. The third dielectric layer B34 is located on the side of the third metal layer B33 closest to the second flexible plate B2. The material and thickness of each film layer in the second flexible plate B2 and the material and thickness of each film layer in the third flexible plate B3 can be designed with reference to the first flexible plate B1.

[0154] The second metal layer B23 can be a signal line, and both the first metal layer B13 and the second metal layer B23 can be reference grounds.

[0155] When the foldable electronic device 100 switches between the unfolded and folded states, the two air gaps K2 in the redundancy section 3012 are compressed, resulting in uncontrollable deformation. Since reference grounds are distributed on both the upper and lower sides of the signal line of the stripline, the distance between the reference grounds on both sides and the signal line changes, causing a large impedance change, resulting in severe impedance mismatch, significant signal loss, and a large degree of insertion loss degradation. Furthermore, because the upper and lower sides of the signal line have metal reference grounds, metal is more prone to breakage during bending compared to other layered materials; that is, the more metal layers there are, the greater the probability of breakage. Therefore, the stripline has relatively poor bending ability. However, the reference grounds on both sides of the signal line can form shielding layers on both sides of the signal line, so the stripline is not easily interfered with by external signals. Similarly, the stripline is not easily interfered with by other external components.

[0156] In this embodiment of the application, "the upper and lower sides of the signal line" refers to the two sides of the signal line in the stacking direction of the multilayer flexible board.

[0157] Figure 5 (b) in the diagram is a schematic diagram of the stacked structure of a coplanar waveguide. For example... Figure 5 As shown in (b), the first flexible plate B1 may include a first dielectric layer B14. The second flexible plate B2 includes a second coating layer B21, a second adhesive layer B22, a second metal layer B23, and a second dielectric layer B24, which are sequentially stacked. The second dielectric layer B24 is located on the side of the second metal layer B23 closer to the third flexible plate B3. The third flexible plate B3 includes a third dielectric layer B34. Neither the first flexible plate B1 nor the third flexible plate B3 of the coplanar waveguide includes a metal layer.

[0158] The second metal layer B23 can form the signal line and the reference ground. That is, the reference ground and the signal line of the coplanar waveguide are formed on the same flexible board layer.

[0159] When the foldable electronic device 100 switches between the unfolded and folded states, although the two air gaps K2 of the redundant part 3012 are compressed and undergo uncontrollable deformation, the reference ground and signal line of the coplanar waveguide are located on the same flexible plate. Therefore, the position of the reference ground relative to the signal line does not change during the folding process, resulting in minimal impedance change and reducing the likelihood of impedance mismatch. Signal loss is also minimal, meaning insertion loss degradation is less severe. Furthermore, neither the first flexible plate B1 nor the second flexible plate B2 of the coplanar waveguide contains a metal layer, significantly reducing the probability of breakage compared to a stripline. Therefore, the coplanar waveguide transmission line has strong bending capability and is less prone to physical damage. However, because the reference ground and signal line are located on the same flexible plate, and there are no metal layers on the top and bottom sides of the signal line, it cannot shield against interference signals in space, resulting in poor anti-interference capability. Similarly, the coplanar waveguide is also prone to causing external interference.

[0160] Figure 5 (c) in the diagram is a schematic diagram of the stacked structure of microstrip lines. For example... Figure 5 As shown in (c), the first flexible plate B1 may include a first coating layer B11, a first adhesive layer B12, a first metal layer B13, and a first dielectric layer B14 stacked sequentially. The first dielectric layer B14 is located on the side of the first metal layer B13 closer to the second flexible plate B2. The second flexible plate B2 includes a second dielectric layer B24. The third flexible plate B3 includes a third dielectric layer B34, a third metal layer B33, a third adhesive layer B32, and a third coating layer B31 stacked sequentially. The third dielectric layer B34 is located on the side of the third metal layer B33 closer to the second flexible plate B2.

[0161] One of the first metal layer B13 and the second metal layer B23 can be used as a signal line, and the other can be used as a reference ground. The second flexible substrate B2 of the microstrip line has no metal layer.

[0162] Figure 5 (d) in the diagram is a schematic diagram of the stacked structure of non-planar microstrip lines. For example... Figure 5 As shown in (d), the stacked structure of the non-planar microstrip line is the same as that of the stripline. The difference lies in that the second metal layer B23 in the non-planar microstrip line serves as a reference ground, while the first metal layer B13 and the third metal layer B33 are both signal lines. The impedance mismatch of the non-planar microstrip line is largely the same as that of the stripline. The anti-interference performance of the non-planar microstrip line is also largely the same as that of the microstrip line.

[0163] In practical applications, the appropriate transmission line type can be selected based on different requirements regarding impedance mismatch, insertion loss, interference immunity, and assembly space in the specific application scenario. For example, stripline lines can be chosen when high interference immunity is required. Coplanar waveguides can be chosen when high insertion loss or thinning requirements are needed for flexible circuit boards.

[0164] In some embodiments, please refer to Figure 3 When the foldable electronic device 100 is in the unfolded state, the air gap K2 in four areas of the flexible circuit board increases, while the multilayer flexible board in the remaining areas remains in a compressed state. (See also...) Figure 4 When the foldable electronic device 100 is in a folded state, the air gap K2 in two areas of the flexible circuit board increases, while the multilayer flexible board in the remaining areas is in a compressed state.

[0165] As the air gap K2 increases, the impedance of the flexible circuit board becomes mismatched towards higher impedances, and as the air gap K2 decreases, the impedance of the flexible circuit board becomes mismatched towards lower impedances. Furthermore, the flexible circuit board is in different states when the foldable electronic device 100 is in different states, and the size of the air gap K2 will change. Therefore, the design of the air gap K2 in striplines, microstrip lines, and non-planar microstrip lines will result in significant fluctuations in insertion loss of the flexible circuit board under different states, meaning poor consistency in insertion loss.

[0166] Please see Figure 6 , Figure 6 This is a schematic diagram illustrating the relationship between insertion loss of the stripline and signal frequency in some embodiments of this application. Figure 6 The horizontal axis represents the signal frequency in gigahertz (GHz), and the vertical axis represents the insertion loss in dB. Figure 6 The dashed line in the figure shows the curve representing the relationship between the insertion loss of the flexible circuit board and the signal frequency when the foldable electronic device 100 is in its unfolded state. Figure 6 The solid line in the figure shows the relationship between the insertion loss of the flexible circuit board and the signal frequency when the foldable electronic device 100 is in a folded state.

[0167] from Figure 6As can be seen, at a frequency of 1 GHz, the difference in insertion loss of the flexible circuit board under different overall system states is approximately 0.14 dB. At a frequency of 3 GHz, the difference is approximately 5.27 dB. At a frequency of 5 GHz, the difference is approximately 1 dB. At a frequency of 6 GHz, the difference is approximately 2 dB.

[0168] In this embodiment of the application, the "difference in insertion loss of flexible circuit board under different overall states" refers to the difference between the insertion loss of flexible circuit board in the unfolded state of foldable electronic device 100 and the insertion loss of flexible circuit board in the folded state of foldable electronic device 100.

[0169] Furthermore, to enable the flexible circuit board to better adapt to the shape changes of the foldable electronic device 100, in some embodiments, the flexible circuit board is redundantly disposed in the foldable electronic device 100. For example, when the foldable electronic device 100 is in the unfolded state, the redundant portion 3012 is approximately S-shaped. In this way, when the foldable electronic device 100 is in the unfolded state, the straight-line distance between the two ends of the flexible circuit board is less than the length of the flexible circuit board. Here, "the length of the flexible circuit board" can be understood as the straight-line distance between the two ends of the flexible circuit board when it is straightened.

[0170] For example, when the foldable electronic device 100 is in its unfolded state, if the straight-line distance between the two ends of the flexible circuit board is 40mm, the length of the flexible circuit board needs to be set to 55mm to 60mm. However, the insertion loss of signal transmission is inversely proportional to the length of the signal line; the longer the signal line, the greater the insertion loss. Therefore, redundant design of the flexible circuit board is not conducive to reducing the insertion loss of signal transmission. At the same time, the longer the flexible circuit board, the greater the resistance, which is detrimental to improving battery charging efficiency and reducing grounding impedance.

[0171] Furthermore, because the flexible circuit board needs to be inserted into the folding mechanism 23 and avoid structures such as the swing arm within the folding mechanism 23, the width of the flexible circuit board cannot be designed to be too large. Otherwise, it would occupy too much space in the folding mechanism 23 in the Y-axis direction, affecting the reliability of the folding mechanism 23. The width of each coplanar waveguide is approximately 2mm, the width of each stripline is 1mm to 1.5mm, and the width of two microstrip lines is 3.4mm to 4mm. Therefore, the number of transmission lines is also greatly limited by the internal assembly space of the folding mechanism 23.

[0172] In other embodiments, the electrical connector 301 may also be a coaxial cable (e.g., a cable). See also Figure 7 , Figure 7 A top view of a foldable electronic device 100 is provided for other embodiments of this application. Figure 7 The electrical connector 301 shown is a coaxial cable, and the coaxial cable is redundantly provided in the foldable electronic device 100. In this way, when the foldable electronic device 100 is in the folded state, the coaxial cable can be stretched.

[0173] To meet the elongation requirements of coaxial cables, please refer to [link / reference]. Figure 7 The coaxial cable can be redundantly arranged in the XY plane. For example, the coaxial cable has redundancy in the X-axis direction and redundancy in the Y-axis direction. However, this redundant design increases the space occupied by the coaxial cable in the folding mechanism 23, affecting the reliability of the folding mechanism 23.

[0174] In addition, using coaxial cable as the electrical connector 301 has the following disadvantages: 1. The wire diameter of the coaxial cable is usually greater than or equal to 0.64mm. Due to its large diameter, the coaxial cable cannot pass through the folding mechanism 23 when the space within the folding mechanism 23 is narrow. 2. The coaxial cable lacks elasticity. When the foldable electronic device 100 switches between different states, the coaxial cable cannot quickly rebound, requiring an auxiliary traction design, resulting in a complex structure. 3. The outer surface of the coaxial cable is easily scratched, which can easily cause excessive radiated spurious emission (RSE), interference, and signal leakage. 4. When the wire diameter of the coaxial cable is 1mm, it will break after approximately 100,000 bends; when the bending radius of the coaxial cable is 0.75mm, it will break after 50,000 bends, resulting in a short lifespan.

[0175] To achieve electrical connection between the first circuit board 31 and the second circuit board 32 while reducing impedance fluctuations and signal insertion losses, please refer to [link to relevant documentation]. Figure 8 , Figure 8 A partial cross-sectional view of a foldable electronic device 100 provided for some embodiments of this application. Figure 8 The foldable electronic device 100 is in an unfolded state. In this embodiment, the foldable electronic device 100 includes a support device 20, a foldable screen 10, and a first flexible circuit board 33. The first flexible circuit board 33 serves as an electrical connector 301. The structures of the support device 20 and the foldable screen 10 in this embodiment can be designed with reference to the support device 20 and the foldable screen 10 in any embodiment of this application, and will not be described in detail here.

[0176] The two ends of the first flexible circuit board 33 are electrically connected to the first circuit board 31 and the second circuit board 32, respectively. The first flexible circuit board 33 can be used to transmit at least one of radio frequency signals and non-radio frequency signals. Alternatively, when the two ends of the first flexible circuit board 33 are electrically connected to the reference ground in the first circuit board 31 and the reference ground in the second circuit board 32, the first flexible circuit board 33 can realize the electrical connection between the two reference grounds.

[0177] Please see Figure 8 The first flexible circuit board 33 includes a first segment 331. When the foldable electronic device 100 is in the unfolded state, the orthographic projection of the first segment 331 on the first plane overlaps with the orthographic projection of the first support member 231 on the first plane. The first plane is perpendicular to the thickness direction of the base (e.g.,...). Figure 8 (The Z-axis direction in the diagram) is perpendicular.

[0178] In some embodiments, the first segment 331 is fixed to the first support member 231. The first segment 331 and the first support member 231 can be fixed by means of adhesive, snap-fit, fastener connection, etc. Since the first support member 231 is located close to the folding screen 10, the distance between the first support member 231 and the folding screen 10 is small. By fixing the first segment 331 to the first support member 231, it is beneficial to reduce the distance between the first segment 331 and the folding screen 10, so that the bending radius of the first flexible circuit board 33 is closer to the bending radius of the folding screen 10. On the one hand, it is beneficial to reduce the overall length of the first flexible circuit board 33, and a small redundancy is required to meet the bending requirements of the first flexible circuit board 33. This is beneficial to reduce the resistance and insertion loss of the first flexible circuit board 33, thereby reducing the impedance fluctuation of the first flexible circuit board 33, improving the insertion loss consistency, improving the charging efficiency of the battery, and reducing the grounding impedance. On the other hand, it is beneficial to reduce the space occupied by the first flexible circuit board 33, which is beneficial to realize the thin design of the foldable electronic device 100 and to optimize the overall layout of the foldable electronic device 100.

[0179] The structure and assembly position of the first flexible circuit board 33 will be described in detail below with reference to the accompanying drawings.

[0180] In some embodiments, please refer to Figure 8 The first flexible circuit board 33 also includes a first intermediate segment 335, a second segment 332, a third segment 333, and a fourth segment 334.

[0181] The first intermediate segment 335 is disposed opposite to the intermediate support member 2302. For example, the first intermediate segment 335 and the intermediate support member 2302 are opposite to each other in the Z-axis direction. Specifically, the orthographic projection of the first intermediate segment 335 on the first plane overlaps with the orthographic projection of the intermediate support member 2302 on the first plane.

[0182] The third section 333 and the first section 331 are located on either side of the first intermediate section 335. When the foldable electronic device 100 is in the unfolded state, the orthographic projection of the third section 333 on the first plane overlaps with the orthographic projection of the second support member 232 on the first plane.

[0183] The second segment 332 is connected to the end of the first segment 331 furthest from the first intermediate segment 335, and a portion of the second segment 332 is located within the first housing 21. The first flexible circuit board 33 can be electrically connected to the first circuit board 31 (i.e., the first structural member) via the second segment 332. The fourth segment 334 is connected to the end of the third segment 333 furthest from the first intermediate segment 335, and a portion of the fourth segment 334 is located within the second housing 22. The first flexible circuit board 33 can be electrically connected to the second circuit board 32 (i.e., the second structural member) via the fourth segment 334.

[0184] Please see Figure 8 The first flexible circuit board 33 also includes a first redundant segment 336 and a third redundant segment 338. When the foldable electronic device 100 switches between an unfolded state and a folded state, the first redundant segment 336 and the third redundant segment 338 can deform (e.g., bend, stretch, etc.) to adapt to the size and shape changes of the foldable electronic device 100 in different states.

[0185] The first redundant segment 336 is connected to the first section 331 and is located on the side of the first section 331 closest to the second main body 202. For example, the first redundant segment 336 is connected between the first intermediate segment 335 and the first section 331. The third redundant segment 338 may be connected between the first intermediate segment 335 and the third section 333. When the foldable electronic device 100 is in the unfolded state, the orthographic projection of the first redundant segment 336 on the first plane overlaps with the orthographic projection of the first gap J1 on the first plane, and the orthographic projection of the third redundant segment 338 on the first plane overlaps with the orthographic projection of the third gap J3 on the first plane. During the switching between the unfolded and folded states of the support device 20, at least one of the first redundant segment 336 and the third redundant segment 338 may undergo deformation (e.g., stretching, bending, etc.).

[0186] For example, when the foldable electronic device 100 is in the unfolded state, at least a portion of the first redundant segment 336 may be located within the first gap J1, and at least a portion of the third redundant segment 338 may be located within the third gap J3. The length of the first redundant segment 336 in the stretched state is greater than the width of the first gap J1. The width of the first gap J1 refers to the dimension of the first gap J1 in the X-axis direction when the foldable electronic device 100 is in the unfolded state.

[0187] When the foldable electronic device 100 is in the unfolded state, the first redundant segment 336 can be arc-shaped, S-shaped, U-shaped, V-shaped, Z-shaped, W-shaped, etc. The shape of the third redundant segment 338 and the dimensional relationship between the third redundant segment 338 and the third gap J3 can be designed with reference to the shape of the first redundant segment 336 and the dimensional relationship between the first redundant segment 336 and the first gap J1, and will not be elaborated here.

[0188] Please refer to 8 and combine Figure 9 , Figure 9 for Figure 8 The diagram shows the foldable electronic device 100 in its folded state. When the foldable electronic device 100 is in the folded state, both the first redundant segment 336 and the third redundant segment 338 are stretched. It is understood that in other embodiments, when the foldable electronic device 100 is in the folded state, only one of the first redundant segment 336 and the third redundant segment 338 may be stretched.

[0189] Because the dimensions of the folding mechanism 23 change when the foldable electronic device 100 switches between the unfolded and folded states. For example, in some embodiments, the gap dimensions between the first support member 231 and the intermediate support member 2302, and between the second support member 232 and the intermediate support member 2302, change as the foldable electronic device 100 folds. The foldable electronic device 100 in this embodiment can adapt to changes in the dimensions and form of the folding mechanism 23 by deforming the first redundant segment 336 and / or the third redundant segment 338. For example, the deformation of the first redundant segment 336 can adapt to changes in the gap dimensions between the first support member 231 and the intermediate support member 2302, and the deformation of the third redundant segment 338 can adapt to changes in the gap dimensions between the second support member 232 and the intermediate support member 2302. This allows the first flexible circuit board 33 to better adapt to the dimensional changes of the foldable electronic device 100 in different forms, which helps to prevent breakage of the first flexible circuit board 33 and thus improves its reliability.

[0190] Meanwhile, during the process between the unfolded state and the folded state of the foldable electronic device 100, the first redundant segment 336 and the third redundant segment 338 can also swing relative to the base and bend to adapt to the shape change of the foldable electronic device 100.

[0191] In some embodiments, to facilitate the deformation of the first redundant segment 336 and the third redundant segment 338, an air gap K2 may be formed between two adjacent flexible plates in the first redundant segment 336 and the third redundant segment 338. That is, both the first redundant segment 336 and the third redundant segment 338 may be formed as redundant portions of the first flexible circuit board 33.

[0192] It is understood that in other embodiments, the first flexible circuit board 33 may also not include one of the first redundant segment 336 and the third redundant segment 338.

[0193] In some embodiments, since the first segment 331 is fixed to the first support member 231, during the switching between the unfolded and folded states of the foldable electronic device 100, the first segment 331 can move together with the first support member 231, causing the first redundant segment 336 to deform (e.g., bend or stretch). In this way, the first redundant segment 336 can deform with the movement of the first support member 231, ensuring smooth switching of the foldable electronic device 100 between different states, and also helping to define the bending shape of the first flexible circuit board 33, and reducing the redundant length of the first flexible circuit board 33, thereby helping to reduce impedance fluctuations, improve impedance, and reduce the space occupied by the first flexible circuit board 33.

[0194] Furthermore, since the first segment 331 is fixed to the first support member 231, the first segment 331 does not deform when the foldable electronic device 100 switches between the unfolded and folded states. In some embodiments, the first segment 331 can be configured as a non-redundant part. That is, no air gap K2 is provided between two adjacent flexible plates in the first segment 331. For example, two adjacent flexible plates in the first segment 331 are bonded and fixed together by an adhesive layer B4. This reduces the redundant length of the first flexible circuit board 33, which is beneficial for reducing impedance fluctuations and improving the consistency of insertion loss.

[0195] In some embodiments, please refer to Figure 8 and combined Figure 9 The first intermediate segment 335 can be fixed to the intermediate support member 2302. In this case, the first intermediate segment 335 is a non-redundant part. During the switching between the unfolded state and the foldable electronic device 100, the first redundant segment 336 can deform, while the first intermediate segment 335 does not deform. Specifically, a portion of the first intermediate segment 335 can be fixed to the intermediate support member 2302, or the entire first intermediate segment 335 can be fixed to the intermediate support member 2302.

[0196] In this way, on the one hand, it is beneficial to reduce the redundant length of the first flexible circuit board 33, thereby reducing impedance fluctuation and improving the consistency of insertion loss; on the other hand, it is also beneficial to control the bending path and bending shape of the first flexible circuit board 33, which is beneficial to reduce the space occupied by the first flexible circuit board 33.

[0197] It is understood that in other embodiments, the first intermediate section 335 may also be on the shaft cover 2301 or other parts of the base 230, as long as at least a portion of the first intermediate section 335 can be fixed to the base 230.

[0198] The connection relationship, connection method, and positional relationship between the third segment 333 and the second support member 232 can be designed with reference to the connection relationship, connection method, and positional relationship between the first segment 331 and the first support member 231 in any embodiment of this application. Furthermore, in the same embodiment, the connection relationship, connection method, and positional relationship between the third segment 333 and the second support member 232 can be the same as, or different from, the connection relationship, connection method, and positional relationship between the first segment 331 and the first support member 231.

[0199] In some embodiments, please refer to Figure 8 and combined Figure 9 The first flexible circuit board 33 also includes a second redundant segment 337 and a fourth redundant segment 339. The second redundant segment 337 is connected between the second segment 332 and the first segment 331, and the fourth redundant segment 339 is connected between the fourth segment 334 and the third segment 333.

[0200] Please see Figure 8 When the foldable electronic device 100 is in the unfolded state, a second gap J2 exists between the first main body 201 and the first support member 231, and a fourth gap J4 exists between the second main body 202 and the second support member 232. The second gap J2 is located on the side of the first support member 231 away from the intermediate support member 2302, and the fourth gap J4 is located on the side of the second support member 232 away from the intermediate support member 2302. For example, the second gap J2 is formed between the first housing 21 and the first support member 231, and the fourth gap J4 is formed between the second housing 22 and the second support member 232.

[0201] When the foldable electronic device 100 is in the unfolded state, the orthographic projection of the second redundant segment 337 in the first plane overlaps with the orthographic projection of the second gap J2 in the first plane. The orthographic projection of the fourth redundant segment 339 in the first plane overlaps with the orthographic projection of the fourth gap J4 in the first plane. For example, when the foldable electronic device 100 is in the unfolded state, at least a portion of the second redundant segment 337 may be located within the second gap J2, and at least a portion of the fourth redundant segment 339 may be located within the fourth gap J4. When the support device 20 switches between the unfolded state and the folded state, at least one of the second redundant segment 337 and the fourth redundant segment 339 may deform.

[0202] The shapes of the second redundant segment 337 and the fourth redundant segment 339 can be designed with reference to the shape of the first redundant segment 336, and will not be described further here. The dimensional relationships between the second redundant segment 337 and the second gap J2, and between the fourth redundant segment 339 and the fourth gap J4 can be designed with reference to the dimensional relationship between the first redundant segment 336 and the first gap J1, and will not be described further here.

[0203] Please see Figure 8 and combined Figure 9 When the foldable electronic device 100 switches from an unfolded state to a folded state, the angle of rotation of the first support member 231 relative to the intermediate support member 2302 is greater than the angle of rotation of the first main body 201 relative to the intermediate support member 2302, and the angle of rotation of the second support member 232 relative to the intermediate support member 2302 is greater than the angle of rotation of the second main body 202 relative to the intermediate support member 2302. Therefore, when the foldable electronic device 100 switches between the unfolded and folded states, the gap size between the first main body 201 and the intermediate support member 2302 changes, and the gap size between the second main body 202 and the intermediate support member 2302 also changes.

[0204] In this way, the deformation of the second redundant segment 337 can adapt to the size change of the gap between the first main body 201 and the intermediate support member 2302, and the deformation of the fourth redundant segment 339 can adapt to the size change of the gap between the second main body 202 and the intermediate support member 2302, which helps to avoid the first flexible circuit board 33 from breaking, thereby improving the reliability of the first flexible circuit board 33.

[0205] Of course, in other embodiments, the size of the second gap J2 may remain unchanged during the switching between the unfolded and folded states of the foldable electronic device 100. In this case, the first flexible circuit board 33 may or may not include the second redundant segment 337. Similarly, the size of the fourth gap J4 may remain unchanged during the switching between the unfolded and folded states of the foldable electronic device 100. In this case, the first flexible circuit board 33 may or may not include the fourth redundant segment 339.

[0206] In some embodiments, please refer to Figure 10a , Figure 10a for Figure 8 The diagram shows an enlarged view of the foldable electronic device in region A. The first support member 231 includes a first outer surface m1, and the first groove C1 includes a first groove sidewall C12. When the foldable electronic device 100 is in the unfolded state, the first outer surface m1 and the first groove sidewall C12 face each other. That is, the first outer surface m1 can face away from the intermediate support member 2302, and the first groove sidewall C12 can face the second main body 202. The second gap J2 is located between the first groove sidewall C12 and the first outer surface m1.

[0207] In this embodiment, the first groove sidewall C12 is spaced apart from the first outer sidewall m1 to form a second gap J2. It will be understood that in other embodiments, please refer to [link to other embodiments]. Figure 10b , Figure 10b This is a partial cross-sectional schematic diagram of a foldable electronic device 100 according to other embodiments of this application. A first clearance groove C120 is formed on the first main body 201. Exemplarily, the first clearance groove C120 is formed in the first housing 21. The first clearance groove C120 penetrates the first groove sidewall C12 and the first bearing surface a1. Exemplarily, the first clearance groove C120 may be recessed from a portion of the surface of the first groove sidewall C12 toward a direction away from the first support member 231, and the first clearance groove C120 penetrates the first bearing surface a1 of the first housing 21. The first clearance groove C120 constitutes at least a portion of the second gap J2.

[0208] Please see Figure 10c , Figure 10c for Figure 10b The diagram shows a partial top view of the first support member 231 and the first main body 201 in the unfolded state of the foldable electronic device 100. Figure 10c The top view shown is a schematic diagram viewed from the foldable screen 10 towards the support device 20. The first groove sidewall C12 includes a first region C121 and a second region C122, which are arranged in the first direction e1. When the foldable electronic device 100 is in the unfolded state, the first region C121 is recessed relative to the second region C122 in a direction away from the first support member 231 to form a first clearance groove C120. The second gap J2 may be located between the first region C121 and the first outer surface m1.

[0209] In this way, while forming a second gap J2 between the first main body 201 and the first support member 231, the gap between the second region C122 and the first outer side m1 is reduced, and the gap between the support device 20 and the folding screen 10 is reduced. This improves the impact resistance of the folding screen 10, prevents bright spots from appearing on the folding screen 10, and improves the flatness of the folding screen 10 in the unfolded state. It also helps to reduce screen shadows and creases that appear during the folding process.

[0210] It is understood that in other embodiments, a second clearance groove may also be provided on the first support member 231, the second clearance groove forming at least a portion of the second gap J2. In this case, the first clearance groove C120 may or may not be provided on the first main body 201.

[0211] The formation method of the fourth gap J4 can be designed with reference to the second gap J2, and will not be elaborated here.

[0212] In some embodiments, please refer back to the reference. Figures 8-9At least a portion of the second segment 332 can be fixed to the first main body 201. For example, at least a portion of the second segment 332 can be fixed to the first housing 21. That is, at least a portion of the second segment 332 can be formed as a non-redundant portion. This, on the one hand, helps to further reduce the redundant length of the first flexible circuit board 33 and further defines the bending shape of the first flexible circuit board 33; on the other hand, the first flexible circuit board 33 can also move together with the first housing 21, and the second redundant segment 337 can deform with the movement of the first housing 21, thereby allowing the first flexible circuit board 33 to better adapt to the size changes of the foldable electronic device 100 in different states, ensuring smooth switching of the foldable electronic device 100 in different states. Furthermore, it allows for better control of the bending path and bending shape of the first flexible circuit board 33, which helps to further reduce the space occupied by the first flexible circuit board 33.

[0213] It is understandable that in embodiments where at least a portion of the second segment 332 is fixed to the first main body 201, the first segment 331 may also slide with the first support member 231. In this case, the first segment 331 may also be formed as a non-redundant portion.

[0214] The structure, placement, and connection relationship between the fourth segment 334 and the second main body 202 can be designed with reference to the structure, placement, and connection relationship between the second segment 332 and the first main body 201 in any embodiment of this application. For example, at least a portion of the fourth segment 334 can be fixed to the second main body 202. Furthermore, in the same embodiment, the structure, placement, and connection relationship between the fourth segment 334 and the second main body 202 can be the same as or different from the structure, placement, and connection relationship between the second segment 332 and the first main body 201.

[0215] In some embodiments, please refer to Figures 8-9 A first space Q3 exists between the foldable screen 10 and the supporting device 20, and at least a portion of the first flexible circuit board 33 is disposed within the first space Q3. The first space Q3 includes a first sub-space between the foldable screen 10 and the first main body 201, a second sub-space between the foldable screen 10 and the second main body 202, and a third sub-space between the foldable screen 10 and the folding mechanism 23. Specifically, the entire first flexible circuit board 33 can be disposed within the first space Q3, or a portion of the first flexible circuit board 33 can be disposed within the first space Q3.

[0216] In this way, on the one hand, the distance between the first flexible circuit board 33 and the folding screen 10 can be further reduced, which is conducive to further reducing the overall length and redundant length of the first flexible circuit board 33, thereby reducing the resistance and impedance fluctuation of the first flexible circuit board 33, which is conducive to reducing grounding impedance, improving battery charging efficiency, and reducing insertion loss and improving insertion loss consistency. On the other hand, it can also make full use of the space between the folding screen 10 and the support device 20, which is conducive to avoiding the first flexible circuit board 33 occupying the internal space of the support device 20. This not only optimizes the structural layout of the foldable electronic device 100, but also makes the structure of the foldable electronic device 100 more compact, which is conducive to reducing the overall thickness of the foldable electronic device 100, and thus conducive to realizing the thin design of the foldable electronic device 100.

[0217] For example, please refer to Figures 8-9 The first segment 331, the first intermediate segment 335, and the third segment 333 can be located within the first space Q3. Specifically, the first segment 331 is located between the first support member 231 and the foldable screen 10, the first intermediate segment 335 is located between the intermediate support member 2302 and the foldable screen 10, and the third segment 333 is located between the second support member 232 and the foldable screen 10.

[0218] In this way, on the one hand, the overall length and redundant length of the first flexible circuit board 33 can be reduced, thereby reducing the insertion loss and impedance fluctuation of the first flexible circuit board 33; on the other hand, it can also prevent the first flexible circuit board 33 from occupying the internal space of the folding mechanism 23, avoid interference between the first section 331 and other structures of the folding mechanism 23 (such as the swing arm), and make the width of the first flexible circuit board 33 no longer limited by the size of the folding mechanism 23 in the Y-axis direction, which is conducive to increasing the width of the first flexible circuit board 33, thereby reducing the resistance of the first flexible circuit board 33, and facilitating the design of multiple transmission lines, making the design of the first flexible circuit board 33 more flexible; furthermore, it is also conducive to reducing the volume of the folding mechanism 23 and optimizing the structural layout of the folding mechanism 23, thereby improving the reliability of the folding mechanism 23.

[0219] On the other hand, the first section 331 and the first intermediate section 335 can be respectively set on the side of the first support member 231 facing the folding screen 10 and the side of the intermediate support member 2302 facing the folding screen 10. The first flexible circuit board 33 does not need to pass through the first gap J1 between the first support member 231 and the intermediate support member 2302, and the third gap J3 between the second support member 232 and the intermediate support member 2302. This helps to reduce the assembly difficulty of the first flexible circuit board 33, thereby improving the assembly efficiency and assembly yield of the first flexible circuit board 33.

[0220] It is understood that, in some other embodiments, at least one of the first segment 331, the first intermediate segment 335, and the third segment 333 may also be located outside the first space Q3.

[0221] In some embodiments, in order to reduce the assembly difficulty of the first flexible circuit board 33 while ensuring the positional accuracy of the first flexible circuit board 33, a first positioning structure (not shown) can be provided on at least one of the first main body 201, the second main body 202, and the folding mechanism 23, and a second positioning structure (not shown) for cooperating with the first positioning structure can be provided on the first flexible circuit board 33. During the assembly process, the positioning of the first flexible circuit board 33 can be achieved through the cooperation of the first positioning structure and the second positioning structure.

[0222] For example, one of the first positioning structure and the second positioning structure can be a positioning hole, a positioning groove, etc., and the other can be a positioning protrusion, a positioning post, etc.

[0223] In some embodiments, please refer to Figures 8-9 A portion of the second section 332 is located between the foldable screen 10 and the first main body 201. Specifically, a portion of the second section 332 may be located between the foldable screen 10 and the first housing 21. This further reduces the overall length and redundant length of the first flexible circuit board 33, thereby further reducing the insertion loss and impedance fluctuation of the first flexible circuit board 33.

[0224] Based on this, in order to facilitate the electrical connection between the first flexible circuit board 33 and the first circuit board 31, in some embodiments, please refer to... Figures 8-9 The first housing 21 has a first through hole K3, which communicates with the first receiving cavity Q1 and penetrates the surface of the first housing 21 facing the foldable screen 10 (i.e., the first bearing surface a1). A portion of the second section 332 passes through the first through hole K3. This facilitates the electrical connection between the second section 332 and the first circuit board 31, and increases the distance between the gap between the first housing 21 and the shaft cover 2301 and the first through hole K3. This extends the path for liquid to enter the first housing 21 from the gap between the first housing 21 and the shaft cover 2301, thereby improving the waterproof performance of the foldable electronic device 100.

[0225] In some embodiments, the foldable electronic device 100 further includes a first seal (not shown), which is disposed within the first through hole K3 and sealingly connected between the second segment 332 and the wall surface of the first through hole K3. Exemplarily, the first seal can be a rubber component, sealant, etc. This further improves the waterproof performance of the foldable electronic device 100.

[0226] The way in which the fourth section 334 is connected to the second circuit board 32 can be designed with reference to the way in which the second section 332 is connected to the first circuit board 31 in any embodiment of this application, and will not be described again here.

[0227] Metal structural components on both sides of the thickness direction of the first flexible circuit board 33 (such as the support structure 102 of the folding screen 10, the folding mechanism 23, the first housing 21 and the second housing 22, etc.) may interfere with the signal of the first flexible circuit board 33. In some embodiments, the following solutions can be adopted to reduce signal interference.

[0228] Option 1: The easily interfered sections of the first flexible circuit board 33 can be designed as striplines. For example, the portion of the first flexible circuit board 33 located within the first space Q3 can be designed as a stripline. The stripline has reference grounds on both the top and bottom sides of the signal line, which can greatly reduce interference from metal structural components.

[0229] Option 2: The easily interfered section of the first flexible circuit board 33 can be designed as a microstrip line, and a material with a low DK (e.g., DK less than or equal to 3.5) can be selected to prepare the dielectric layer (e.g., the first dielectric layer B14 and the third dielectric layer B34) for carrying the signal line, and the thickness of the dielectric layer can be designed to be greater than or equal to 12μm.

[0230] Option 3: Replace the metal structural components on both sides of the thickness direction of the first flexible circuit board 33 with insulating components, or provide an insulating layer on the surface of the metal structural components facing the first flexible circuit board 33.

[0231] Option 4: Design the easily interfered sections of the first flexible circuit board 33 as coplanar waveguides or microstrip lines, and design the metal structures on both sides of the thickness direction of the first flexible circuit board 33 as the reference ground of the first flexible circuit board 33. Construct a pseudo-strip line through grounding or coupling.

[0232] Based on any of the above embodiments, in order to compensate for insertion loss, please refer to... Figure 11 , Figure 11 This is a simplified schematic diagram of a foldable electronic device 100 provided in some embodiments of this application. A first circuit board 31 has an RF chip 31a, and a second circuit board 32 has an RF front-end module 32a and a calibration module 32b. The calibration module 32b is positioned in front of the RF front-end module 32a, causing the receiving front-end in the RF front-end module 32a to be positioned in front of the feed point of the antenna in the second main body 202. A first flexible circuit board 33 is electrically connected to both the RF chip 31a and the RF front-end module 32a. In this way, the path loss is only from the RF front-end module 32a to the aforementioned antenna, effectively compensating for the loss of the first flexible circuit board 33, reducing insertion loss, and thus optimizing RF performance indicators.

[0233] In some other embodiments, please refer to Figure 12 , Figure 12 This is a partial cross-sectional view of a foldable electronic device 100 in its unfolded state, provided for further embodiments of this application. The foldable electronic device 100 in this embodiment is similar to... Figure 8 The difference between the foldable electronic device 100 shown is that, in addition to the support device 20, the foldable screen 10, and the first flexible circuit board 33, the foldable electronic device 100 in this embodiment also includes a support piece 40, which is located on the side of the folding mechanism 23 facing the foldable screen 10. It should be noted that the support piece 40 in this embodiment can be applied to the foldable electronic device 100 in any embodiment of this application.

[0234] Please see Figure 12 When the foldable electronic device 100 is in the unfolded state, the support sheet 40 is stacked on top of the first support member 231, the second support member 232, and the intermediate support member 2302, and the support sheet 40 covers the first gap J1 and the third gap J3. In this state, the third display portion 13 of the foldable screen 10 can be supported on the support sheet 40. For example, a portion of the first flexible circuit board 33 can be disposed between the support sheet 40 and the folding mechanism 23. For example, at least one of the first segment 331, the first intermediate segment 335, and the third segment 333 can be disposed between the support sheet 40 and the folding mechanism 23.

[0235] In this way, the support plate 40 can support the parts of the folding screen 10 that are opposite to the first gap J1 and the third gap J3, which can improve the impact resistance of the folding screen 10, prevent the appearance of bright spots on the folding screen 10, improve the flatness of the folding screen 10 in the unfolded state, help reduce screen light and shadow, and reduce creases that appear on the folding screen 10 during the folding process.

[0236] Furthermore, in some embodiments, the first flexible circuit board 33 can be separated from the support structure 102 in the foldable screen 10 by the support piece 40. This can effectively prevent the first flexible circuit board 33 from pressing against or pressing against the screen during the folding or unfolding of the foldable electronic device 100, reducing the risk of the foldable screen 10 arching during bending. At the same time, it can also prevent the first flexible circuit board 33 from being stuck in the hollow hole K1 on the support structure 102, which is beneficial to improving the reliability of the first flexible circuit board 33. In turn, it can improve the stability and reliability of signal transmission between the first circuit board 31 and the second circuit board 32.

[0237] Please see Figure 13 , Figure 13 for Figure 12The diagram shows a partial cross-sectional view of the foldable electronic device 100 in its folded state. When the folding mechanism 23 is in the folded state, the support piece 40 is bent. In this way, when the first support member 231 and the second support member 232 rotate relative to the intermediate support member 2302 between the unfolded position and the folded position, the support piece 40 can be bent together with the foldable screen 10, thus preventing the support piece 40 from affecting the bending effect of the foldable screen 10.

[0238] In order to facilitate the bending of the support plate 40 together with the folding screen 10, in some embodiments, at least a portion of the support plate 40 can slide relative to the folding mechanism 23 when the foldable electronic device 100 switches between an unfolded state and a folded state.

[0239] In some embodiments, please refer to Figure 14 and combined Figures 15-16 , Figure 14 for Figure 12 The diagram shows an assembly perspective of the support plate 40, folding mechanism 23, and first flexible circuit board 33 in the foldable electronic device 100. Figure 15 for Figure 14 The assembled 3D view shown is a cross-sectional view at line BB. Figure 16 for Figure 15 The cross-sectional view of the support plate 40, folding mechanism 23, and first flexible circuit board 33 in the folded state is shown.

[0240] One end of the support piece 40 is connected to the first support member 231, and the other end can slide with the second support member 232. That is, when the folding mechanism 23 is folded between the unfolded state and the folded state, the support piece 40 can slide relative to the second support member 232. For example, the support piece 40 and the first support member 231 can be fixed by means of bonding, welding, snap-fitting, fastener connection, etc. Alternatively, the support piece 40 can also be rotatably connected to the first support member 231 by means of a pivot, flexible structure, etc., without specific limitation.

[0241] In this way, when the foldable electronic device 100 is folded between the unfolded state and the folded state, the support piece 40 can adapt to the gap change between the first support member 231 and the second support member 232, which can reduce the stress on the foldable screen 10 and ensure the flatness of the support piece 40 in the unfolded state, thereby improving the flatness of the foldable screen 10 in the unfolded state.

[0242] It is understood that in other embodiments, the middle portion of the support piece 40 may be fixed to the folding mechanism 23, and both ends of the support piece 40 may be slidably connected to the folding mechanism 23. For example, the middle portion of the support piece 40 may be fixedly connected to the intermediate support member 2302, and both ends of the support piece 40 may be slidably connected to the first support member 231 and the second support member 232, respectively. This is as long as it ensures that at least a portion of the support piece 40 can slide relative to the folding mechanism 23 when the folding mechanism 23 is folded between the unfolded and folded states.

[0243] In some embodiments, to ensure the supporting performance of the support sheet 40, the support sheet 40 can be a metal sheet. For example, the support sheet 40 can be a stainless steel sheet, a titanium alloy sheet, etc. In other embodiments, to reduce signal interference from the support sheet 40 to the first flexible circuit board 33, the support sheet 40 can be an insulating element. For example, the support sheet 40 can be a Mylar sheet, etc. Alternatively, in yet another embodiment, the support sheet 40 can also include a stacked metal layer and an insulating layer, with the insulating layer located on the side of the metal layer facing away from the folding screen 10. Alternatively, the transmission line type of the portion of the first flexible circuit board 33 opposite to the support sheet 40 (e.g., the first segment 331, the third segment 333, the first intermediate segment 335, the first redundant segment 336, the third redundant segment 338, etc.) can be designed to reduce the interference caused by the support sheet 40 to the signal. Alternatively, the interference caused by the support sheet 40 to the signal can be reduced by increasing the distance between the first flexible circuit board 33 and the support sheet 40 in the Z-axis direction.

[0244] Based on any of the above embodiments, in order to improve the wear resistance of the support piece 40 and reduce the noise generated by the support piece 40 rubbing against the second support member 232 during the folding process of the foldable electronic device 100, please refer to... Figures 15-16 A wear-resistant layer 50 is provided between the support plate 40 and the second support member 232. The wear-resistant layer 50 can be disposed on the surface of the second support member 232 facing the support plate 40, or on the surface of the support plate 40 facing the second support member 232. The material of the wear-resistant layer 50 includes at least one of polytetrafluoroethylene (PTFE), polyoxymethylene (POM), polyurethane, rubber, and latex.

[0245] In some embodiments, please refer to Figure 17 , Figure 17 for Figure 12 The diagram shows a perspective view of the folding mechanism 23 in the foldable electronic device 100. The first support member 231 includes a first top surface m3 and a first bottom surface m4 facing away from each other, with the first top surface m3 facing the foldable screen 10. The first support member 231 is provided with a first recess C3, and a first section 331 is disposed within the first recess C3.

[0246] In this way, on the one hand, the superimposed thickness between the first section 331 and the first support member 231 can be reduced, which is conducive to reducing the overall thickness of the foldable electronic device 100 and thus facilitating the thinner design of the foldable electronic device 100; on the other hand, it can also expand the assembly space of the first section 331, making the selection of the thickness of the first section 331 more flexible; furthermore, it is also conducive to increasing the spacing between the first flexible circuit board 33 and the metal structural components such as the support piece 40 and the support structure 102, thereby helping to reduce the interference of the metal structural components such as the support piece 40 and the support structure 102 on the signal of the first flexible circuit board 33; and furthermore, during the assembly process, the first groove C3 can also be used to position the first flexible circuit board 33, which helps to reduce the assembly difficulty of the first flexible circuit board 33.

[0247] In this embodiment, the first section 331 is located on the side of the first support member 231 facing the folding screen 10, and the first recess C3 is recessed from the first top surface m3 toward the first bottom surface m4. It is understood that in other embodiments, when the first section 331 is located on the side of the first support member 231 facing the folding screen 10, the first recess C3 may be recessed from the first bottom surface m4 toward the first top surface m3.

[0248] Please continue reading. Figure 17 The first support member 231 includes a first inner side m2 that faces away from the first outer side m1. When the foldable electronic device 100 is in the unfolded state, the first inner side m2 faces the intermediate support member 2302. In some embodiments, the first recess C3 extends through the first inner side m2 and the first outer side m1. This facilitates the assembly of the first section 331 into the first recess C3 and reduces the assembly difficulty of the first section 331.

[0249] Furthermore, the second support member 232 is provided with a second sinking groove C4, the third section 333 is disposed within the second sinking groove C4, the intermediate support member 2302 is provided with a third sinking groove C5, and the first intermediate section 335 is disposed within the third sinking groove C5. The structures of the second sinking groove C4 and the third sinking groove C5 can be designed with reference to the structure of the first sinking groove C3 in any embodiment of this application, and will not be described in detail here.

[0250] In some embodiments, please refer to Figure 18 , Figure 18 for Figure 12The diagram shows a perspective view of the first main body 201 of the foldable electronic device 100. The first main body 201 has a fourth recess C6 that penetrates the first bearing surface a1 and the first groove sidewall C12 of the first recess C1. At least a portion of the second section 332 can be disposed within the fourth recess C6. This reduces the superposition thickness between the second section 332 and the first main body 201 and facilitates increasing the distance between the first flexible circuit board 33 and the support structure 102 in the foldable screen 10, thereby reducing interference from metal structural components such as the support structure 102 to the signal of the first flexible circuit board 33. Furthermore, during assembly, the fourth recess C6 can also position the first flexible circuit board 33, reducing the assembly difficulty of the first flexible circuit board 33.

[0251] Similarly, a fifth settling tank can be provided on the second main body 202, and a portion of the fourth section 334 can be provided within the fifth settling tank. The structure of the fifth settling tank is the same as that of the fourth settling tank C6, and will not be described in detail here.

[0252] In some other embodiments, please refer to Figures 19-20 , Figure 19 A partial cross-sectional view of a foldable electronic device 100 provided in some embodiments of this application in its unfolded state. Figure 20 for Figure 19 The diagram shows the foldable electronic device 100 in its folded state. The difference between the foldable electronic device 100 in this embodiment and that in any of the above embodiments is that, in this embodiment, the first intermediate segment 335 of the first flexible circuit board 33 is not fixed relative to the shaft cover 2301. During the switching between the unfolded and folded states of the foldable electronic device 100, the first intermediate segment 335 can deform. For example, during this process, the first intermediate segment 335 can be bent, stretched, etc. In this way, the first flexible circuit board 33 can better adapt to the dimensional changes of the foldable electronic device 100 in different states.

[0253] To facilitate bending of the first intermediate section 335, a spatial gap K2 can be formed between two adjacent flexible plates in the first intermediate section 335. That is, the first intermediate section 335 can be formed as a redundant part.

[0254] In some embodiments, please refer to Figure 19 When the foldable electronic device 100 is in the unfolded state, at least a portion of the first intermediate section 335 arches towards the side opposite to the foldable screen 10. For example, an arch can be formed on the first intermediate section 335. This helps to increase the length of the first intermediate section 335 and ensures the deformation space of the first flexible circuit board 33.

[0255] It is understood that, in other embodiments where the first intermediate segment 335 is deformable, the first flexible circuit board 33 may also exclude at least one of the first redundant segment 336 and the third redundant segment 338.

[0256] In some embodiments, the first intermediate segment 335 may be located between the intermediate support 2302 and the foldable screen 10. See also... Figures 19-20 The intermediate support member 2302 is provided with a receiving groove C8. For details, please refer to [link / reference needed]. Figure 20 The intermediate support member 2302 includes a second support surface n1 and a second bottom surface n2 facing away from each other, with the second support surface n1 facing the foldable screen 10. A receiving groove C8 can penetrate through the second support surface n1. Specifically, the receiving groove C8 can be formed by a recess in the second support surface n1 facing the second bottom surface n2. When the foldable electronic device 100 is in the unfolded state, at least a portion of the first intermediate section 335 is disposed within the receiving groove C8. For example, an arched portion in the first intermediate section 335 can be located within the receiving groove C8.

[0257] In this way, on the one hand, when the foldable electronic device 100 is in the unfolded state, the first intermediate section 335 can be accommodated by the receiving slot C8, which helps to ensure the redundant length of the first intermediate section 335 and avoids the first intermediate section 335 being squeezed due to insufficient accommodating space when the foldable electronic device 100 is in the unfolded state. This reduces the stress on the first intermediate section 335 and helps to improve the reliability of the first flexible circuit board 33. On the other hand, when the foldable electronic device 100 is in the folded state, the receiving slot C8 can also be used to avoid the folding screen 10, support piece 40 and other structures, which can prevent the intermediate support 2302 from squeezing the folding screen 10, thereby further improving the reliability of the folding screen 10.

[0258] It is understood that in other embodiments, when the foldable electronic device 100 is in the unfolded state, the first intermediate segment 335 may also be approximately flat. That is, the dimensions of the first intermediate segment 335 are not redundant. In this case, the deformation of the first redundant segment 336 and / or the third redundant segment 338 can be used to accommodate changes in the first gap J1 and the third gap J3.

[0259] In this embodiment, the positions and fixing methods of other sections of the first flexible circuit board 33 (such as the first section 331, the second section 332, the third section 333, the fourth section 334, the first redundant section 336, the third redundant section 338, etc.) can be designed with reference to the first flexible circuit board 33 in any embodiment of this application, and will not be described again here.

[0260] In some other embodiments, please refer to Figures 21-22 , Figure 21A partial cross-sectional view of a foldable electronic device 100 provided in some embodiments of this application. Figure 22 for Figure 21 The diagram shows the foldable electronic device 100 in its folded state. The foldable electronic device 100 of this embodiment differs from that of any of the aforementioned embodiments in that, in this embodiment, the first intermediate segment 335 of the first flexible circuit board 33 is located on the side of the intermediate support member 2302 facing away from the foldable screen 10. The positions and fixing methods of other segments of the first flexible circuit board 33 in this embodiment (e.g., first segment 331, second segment 332, third segment 333, fourth segment 334, first redundant segment 336, third redundant segment 338, etc.) can be designed with reference to the first flexible circuit board 33 in any embodiment of this application.

[0261] In this way, the first intermediate section 335 can be separated from the support plate 40, folding screen 10 and other structures by the intermediate support member 2302. This not only reduces the interference of metal structural components such as the support plate 40 and support structure 102 on the transmission signal, but also avoids the top screen of the first intermediate section 335, which can reduce the risk of the folding screen 10 arching.

[0262] In some embodiments, the first intermediate section 335 is not fixed relative to the shaft cover 2301. See also... Figure 22 When the foldable electronic device 100 switches between an unfolded state and a folded state, the first intermediate segment 335 can deform (e.g., bend, stretch, etc.). For example, the first intermediate segment 335 can be redundantly located between the intermediate support member 2302 and the shaft cover 2301. When the foldable electronic device 100 is in the unfolded state, the first intermediate segment 335 can be arc-shaped.

[0263] In some other embodiments, please refer to Figures 23-24 , Figure 23 A partial cross-sectional view of a foldable electronic device 100 provided in some embodiments of this application in its unfolded state. Figure 24 for Figure 23 This is a schematic diagram of the foldable electronic device 100 in its folded state. The foldable electronic device 100 in this embodiment is similar to... Figure 22 The difference in the foldable electronic device 100 shown is that, in this embodiment, the first intermediate segment 335 can be fixed to the base 230. For example, the first intermediate segment 335 can be fixed to the intermediate support 2302 or the shaft cover 2301. In this case, at least a portion of the first intermediate segment 335 is a non-redundant portion. This reduces the redundant length of the first flexible circuit board 33 and better restricts the bending shape of the first flexible circuit board 33, which helps to reduce the space occupied by the first flexible circuit board 33 inside the folding mechanism 23, and also helps to improve the consistency of insertion loss.

[0264] The positions and fixing methods of other sections of the first flexible circuit board 33 in this embodiment (such as the first section 331, the second section 332, the third section 333, the fourth section 334, the first redundant section 336, the third redundant section 338, etc.) can be designed with reference to the first flexible circuit board 33 in any embodiment of this application, and will not be described again here.

[0265] In some other embodiments, please refer to Figures 25-28 , Figures 25-28 These are partial cross-sectional views of the foldable electronic device 100 provided in some embodiments of this application. The difference between the foldable electronic device 100 in this embodiment and the foldable electronic device 100 in any of the above embodiments is that, in this embodiment, the first segment 331 of the first flexible circuit board 33 is located on the side of the first support member 231 facing away from the folding screen 10. The setting position of the first segment 331 in this embodiment can be applied to the foldable electronic device 100 in any embodiment of this application.

[0266] In this way, the first section 331 can be separated from the support plate 40, folding screen 10 and other structures by the first support member 231. This not only reduces the interference of metal structural components such as the support plate 40 and support structure 102 on the transmission signal, but also avoids the top screen of the first section 331, which can reduce the risk of the folding screen 10 arching.

[0267] In some embodiments, please refer to Figure 25 and Figure 26 The first through hole K3 penetrates the first groove sidewall C12 of the first groove C1. That is, the first through hole K3 penetrates the first sidewall surface a2. The second section 332 of the first flexible circuit board 33 can pass through the first through hole K3 and be electrically connected to the first circuit board 31.

[0268] In this way, the first flexible circuit board 33 does not need to pass through the gap (e.g., the second gap J2) between the first main body 201 and the first support member 231. This not only reduces the difficulty of electrical connection between the first flexible circuit board 33 and the first circuit board 31, but also helps to reduce the overall length of the first flexible circuit board 33, thereby reducing the resistance of the first flexible circuit board 33 and thus reducing signal insertion loss.

[0269] It is understood that the electrical connection method between the first flexible circuit board 33 and the first circuit board 31 in the embodiments of this application can be applied to the foldable electronic device 100 in any embodiment of this application.

[0270] Additionally, please see Figures 27-28When at least a portion of the first section 331 is located opposite the folding screen 10 of the first support member 231, the first flexible circuit board 33 can also pass through the gap (e.g., the second gap J2) between the first main body 201 and the first support member 231, and enter the first housing 21 via the first through hole K3, thereby achieving an electrical connection between the first flexible circuit board 33 and the first circuit board 31. In this case, the first through hole K3 penetrates the surface of the first main body 201 facing the folding screen 10.

[0271] In some embodiments, please refer to Figures 25-27 The first intermediate segment 335 is located on the side of the intermediate support member 2302 facing away from the foldable screen 10, and the first section 331 is located on the side of the first support member 231 facing away from the foldable screen 10. In this way, the first flexible circuit board 33 does not need to pass through the first gap J1, which not only helps to reduce the assembly difficulty of the first flexible circuit board 33, but also helps to reduce the overall length of the first flexible circuit board 33, thereby helping to reduce the resistance of the first flexible circuit board 33.

[0272] Of course, in other embodiments, the first segment 331 and the first intermediate segment 335 may also be located on both sides of the thickness direction of the intermediate support 2302 (e.g. Figure 28 (As shown).

[0273] In some other embodiments, please refer to Figures 29-30 , Figure 29 This is a partial cross-sectional view of the foldable electronic device 100 provided in some embodiments of this application in its unfolded state. Figure 30 for Figure 29 The diagram shows the foldable electronic device 100 in its folded state. The difference between the foldable electronic device 100 in this embodiment and those in any of the aforementioned embodiments is that in all the aforementioned embodiments, the first segment 331 is stacked on top of the first support member 231. That is, the first segment 331 is located on one side of the thickness direction of the first support member 231. In this embodiment, however, the first support member 231 has at least one first through hole 231a, which penetrates both sides of the first support member 231 in the thickness direction. The first segment 331 passes through at least one first through hole 231a. Thus, the first segment 331 can be connected to the first support member 231 through the first through hole 231a, resulting in a simple structure and ingenious design.

[0274] In some embodiments, the first through hole 231a can be reused as a weight-reducing hole on the first support member 231. In this way, the assembly of the first section 331 can be achieved without having to additionally open the first through hole 231a on the first support member 231, which can further simplify the structure of the foldable electronic device 100.

[0275] In some embodiments, the first segment 331 may be bonded and fixed within the first through hole 231a, which makes the position of the first segment 331 more stable. It is understood that in other embodiments, the first segment 331 may not be fixed within the first through hole 231a; for example, the first segment 331 may slide with the first through hole 231a.

[0276] The connection method between the first segment 331 and the first support member 231 in this embodiment can be applied to the foldable electronic device 100 in any embodiment of this application.

[0277] In some other embodiments, please refer to Figures 31-32 , Figures 31-32 These are partial cross-sectional views of the foldable electronic device 100 in its unfolded state, provided in some embodiments of this application. The difference between the foldable electronic device 100 in this embodiment and the foldable electronic device 100 in any of the above embodiments is that the first segment 331 in this embodiment can slide with the first support member 231. That is, the first segment 331 and the first support member 231 are not fixed relative to each other.

[0278] Specifically, during the switching between the unfolded and folded states of the foldable electronic device 100, the first segment 331 can slide in cooperation with the first support member 231. For example, the first segment 331 can slide relative to the first support member 231 along a second direction e2. The second direction e2 can be parallel to the width direction of the first support member 231. For example, when the foldable electronic device 100 is in the unfolded state, the second direction e2 is parallel to the X-axis direction.

[0279] In this way, the distance between the first section 331 and the folding screen 10 can also be reduced, making the bending radius of the first flexible circuit board 33 closer to that of the folding screen 10. This also helps to reduce the overall length and redundant length of the first flexible circuit board 33, thereby reducing the insertion loss and impedance fluctuation of the first flexible circuit board 33, and reducing the space occupied by the first flexible circuit board 33.

[0280] Please see Figure 31 When the first flexible circuit board 33 includes the first redundant segment 336, since the first segment 331 slides with the first support member 231 when the foldable electronic device 100 switches between the unfolded and folded states, the first redundant segment 336 can adapt not only to changes in the size of the gap between the first support member 231 and the intermediate support member 2302, but also to changes in the size of the gap between the second support member 232 and the intermediate support member 2302. Therefore, the first flexible circuit board 33 may not include the second redundant segment 337.

[0281] Please see Figure 32When the first flexible circuit board 33 includes the second redundant segment 337, and / or when the first intermediate segment 335 is not relatively fixed to the base 230, the first flexible circuit board 33 may not include the first redundant segment 336.

[0282] In other embodiments, where the first section 331 can slide with the first support member 231 and the first intermediate section 335 can deform, the first flexible circuit board 33 may also not include at least one of the first redundant section 336, the third redundant section 338, the second redundant section 337 and the fourth redundant section 339.

[0283] In some embodiments, to limit the sliding direction of the first segment 331 relative to the first support 231, please refer to... Figure 33 , Figure 33 This is a schematic diagram of the assembly of the first segment 331 and the first support member 231 provided in some embodiments of this application. The first support member 231 is provided with a limiting groove 231b, and the first segment 331 slides in conjunction with the limiting groove 231b.

[0284] The structure of the limiting groove 231b can be the same as that of the first recessed groove C3 in the above embodiment. For example, the limiting groove 231b can penetrate the first top surface m3, the first outer surface m1, and the first inner surface m2 of the first support member 231. In other embodiments, the limiting groove 231b can also penetrate the first bottom surface m4, the first outer surface m1, and the first inner surface m2 of the first support member 231. This not only restricts the sliding direction of the first segment 331 but also reduces the superimposed thickness of the first segment 331 and the first support member 231.

[0285] Based on any of the above embodiments, please refer to Figure 34 , Figure 34 This is a partial cross-sectional view of a foldable electronic device 100 provided in some embodiments of this application. The foldable electronic device 100 also includes a second flexible circuit board 34, the two ends of which are electrically connected to the first circuit board 31 and the second circuit board 32, respectively. The second flexible circuit board 34 in this embodiment can be applied to the foldable electronic device 100 in any embodiment of this application.

[0286] One of the first flexible circuit board 33 and the second flexible circuit board 34 is a radio frequency (RF) transmission line used to transmit RF signals; the other is a non-RF transmission line used to transmit non-RF signals. For example, the first flexible circuit board 33 can be an RF transmission line, and the second flexible circuit board 34 can be a non-RF transmission line. Alternatively, the first flexible circuit board 33 can be a non-RF transmission line, and the second flexible circuit board 34 can be an RF transmission line.

[0287] In this way, by setting two independent electrical connectors, the first flexible circuit board 33 and the second flexible circuit board 34, the radio frequency signal and the non-radio frequency signal can be designed separately, which helps to improve the signal isolation, avoid interference between the radio frequency signal and the non-radio frequency signal, and improve the anti-interference performance of the foldable electronic device 100.

[0288] In some embodiments, at least a portion of the first flexible circuit board 33 and at least a portion of the second flexible circuit board 34 are in the thickness direction of the first flexible circuit board 33 (e.g., ...). Figure 34 The two flexible circuit boards are spaced apart along the Z-axis. In this way, the first flexible circuit board 33 and the second flexible circuit board 34 can form spatial isolation in the thickness direction of the first flexible circuit board 33, which can further improve the isolation effect between radio frequency signals and non-radio frequency signals.

[0289] Please see Figure 34 The second flexible circuit board 34 includes a second intermediate section 343, a first connecting section 341, and a second connecting section 342. The first connecting section 341 and the second connecting section 342 are respectively connected to the two ends of the second intermediate section 343. The second intermediate section 343 is disposed opposite to the base 230, the first connecting section 341 is disposed opposite to the first support member 231, and the second connecting section 342 is disposed opposite to the second support member 232.

[0290] In some embodiments, the first connecting segment 341 and the first section 331 are located on opposite sides of the thickness direction of the first support member 231. This can further improve the isolation between the first connecting segment 341 and the first section 331, which is beneficial to further improving the signal isolation between the first flexible circuit board 33 and the second flexible circuit board 34.

[0291] In some embodiments, the second intermediate segment 343 can be fixed relative to the shaft cover 2301, and the first connecting segment 341 is redundantly disposed on the side of the first support member 231 facing away from the foldable screen 10. For example, the first connecting segment 341 is redundantly disposed within the first groove C1. When the foldable electronic device 100 switches between an unfolded state and a folded state, the first connecting segment 341 can deform (e.g., stretch or bend). In this way, the second flexible circuit board 34 can adapt to the shape changes of the foldable electronic device 100, which is beneficial to improving the reliability of the second flexible circuit board 34.

[0292] The structure of the second connecting segment 342 and the positional relationship between the second connecting segment 342 and the third segment 333 can be designed with reference to the structure of the first connecting segment 341 and the positional relationship between the first connecting segment 341 and the first segment 331, and will not be elaborated here.

[0293] In some embodiments, please refer to Figure 34The first housing 21 has a second through hole K5, which communicates with the first receiving cavity Q1 and penetrates the first groove sidewall C12 of the first groove C1. In other words, the second through hole K5 penetrates the first sidewall surface a2. The second flexible circuit board 34 can pass through the second through hole K5 and be electrically connected to the first circuit board 31. This facilitates the electrical connection between the second flexible circuit board 34 and the first circuit board 31.

[0294] In some embodiments, the second through hole K5 and the first through hole K3 are respectively formed on different wall surfaces of the first main body 201. For example, one of the second through hole K5 and the first through hole K3 is formed on the first bearing surface a1, and the other is formed on the first side wall surface a2. This helps to reduce the opening size of the first through hole K3 and the second through hole K5, thereby helping to improve the structural strength of the first housing 21.

[0295] In some embodiments, please refer to Figure 35 , Figure 35 for Figure 34 The diagram shows a top view of the foldable electronic device 100 in its unfolded state. Figure 35 The top view in the diagram refers to a schematic diagram viewed from the foldable screen 10 towards the support device 20. The orthographic projection of the first flexible circuit board 33 on the first plane overlaps with the orthographic projection of the second flexible circuit board 34 on the first plane. This helps to increase the distance between the two opposite end faces of the first flexible circuit board 33 and the base 230 in the Y-axis direction, as well as the distance between the two opposite end faces of the second flexible circuit board 34 and the base 230 in the Y-axis direction. This also helps to reduce the difficulty of opening the first through hole K3 and the second through hole K5, and reduces the difficulty of sealing the first through hole K3 and the second through hole K5, thereby improving the waterproof performance of the foldable electronic device 100.

[0296] Please see Figure 36 , Figure 36 This is a top view of a foldable electronic device 100 provided in some embodiments of this application in its unfolded state. The first flexible circuit board 33 and the second flexible circuit board 34 may be spaced apart in a first direction e1. Specifically, the orthographic projections of the first flexible circuit board 33 and the second flexible circuit board 34 on the first plane do not overlap. The first direction e1 is parallel to the axis of rotation of the first main body 201 relative to the second main body 202. For example, the first direction e1 is parallel to the Y-axis direction.

[0297] In this way, the first flexible circuit board 33 and the second flexible circuit board 34 can form spatial isolation in the first direction e1, which can further improve the isolation effect between radio frequency signals and non-radio frequency signals.

[0298] It is understood that in other embodiments, when the first flexible circuit board 33 and the second flexible circuit board 34 are spaced apart in the first direction e1, the structure and arrangement position of the second flexible circuit board 34 may be the same as those of the first flexible circuit board 33. Furthermore, in embodiments where the first flexible circuit board 33 and the second flexible circuit board 34 are spaced apart in the first direction e1, the first flexible circuit board 33 and the second flexible circuit board 34 may or may not be spaced apart in the Z-axis direction.

[0299] In some other embodiments, please refer to Figure 37 , Figure 37 This is a partial cross-sectional view of a foldable electronic device 100 provided in some embodiments of this application. The foldable electronic device 100 in this embodiment differs from the foldable electronic device 100 in any of the above embodiments in that the first structural member is a first ground metal, the second structural member is a second ground metal, and the two ends of the first flexible circuit board 33 are electrically connected to the first ground metal and the second ground metal, respectively.

[0300] In this way, a grounding link with low and stable impedance can be formed between the first grounding metal and the second grounding metal. On the one hand, it can effectively improve the return current of the antenna, which is conducive to reducing the generation of harmonics and avoiding harmonic fluctuations, thereby effectively suppressing the excessive radiated spurious emission (RSE).

[0301] In some embodiments, the first housing 21 includes a first ground metal, and the second housing 22 includes a second ground metal. For example, the first middle frame 211 may be formed as the first ground metal, and the second middle frame 221 may be formed as the second ground metal, as illustrated in the description. It is understood that in other embodiments, the first circuit board 31 may include the first ground metal, and the second circuit board 32 may include the second ground metal.

[0302] Based on the descriptions of the above embodiments, the foldable electronic device 100 in this application embodiment, by providing the aforementioned first flexible circuit board 33, can effectively reduce the overall length and redundant length of the first flexible circuit board 33. For example, in some embodiments of this application, the overall length of the first flexible circuit board 33 can be 35mm, and the length of the redundant portion (including the portion containing the air gap K2) is 5mm. In related technologies, the length of the flexible circuit board is 60mm, and the length of the redundant portion is 20mm. Compared to the first flexible circuit board 33 in related technologies, the overall length of the first flexible circuit board 33 in this application embodiment can be reduced by approximately 25mm, and the length of the redundant portion can be reduced by approximately 15mm.

[0303] The insertion loss benefit of the first flexible circuit board 33 is explained below. Table 1 lists the insertion loss of the coplanar waveguide.

[0304] Table 1

[0305]

[0306]

[0307] When the first flexible circuit board 33 is a coplanar waveguide, the insertion loss of the first flexible circuit board 33 in this embodiment is:

[0308] 0.5*30 / 100 + 0.9*5 / 100 = 0.195dB. The insertion loss of flexible circuit boards in related technologies is: 0.5*40 / 100 + 0.9*20 / 100 = 0.38dB. The insertion loss of the first flexible circuit board 33 in this embodiment can be reduced by 0.235dB compared to the insertion loss of flexible circuit boards in related technologies, a reduction of approximately 50%.

[0309] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0310] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A foldable electronic device, characterized in that, include: A support device includes a first main body, a second main body, and a folding mechanism, wherein the folding mechanism is connected between the first main body and the second main body, and the support device can switch between an unfolded state and a folded state. The folding mechanism includes a base and a first support member, the first support member being rotatable relative to the base; The first main body includes a first structural component, and the second main body includes a second structural component; A first flexible circuit board, the two ends of which are electrically connected to the first structural member and the second structural member respectively; the first flexible circuit board includes a first section, the first section being fixed to the first support member, or the first section being slidably engaged with the first support member.

2. The foldable electronic device according to claim 1, characterized in that, The first flexible circuit board includes a first redundant segment, which is connected to the first section; The base includes an intermediate support member. When the support device is in the unfolded state, there is a first gap between the first support member and the intermediate support member. The orthographic projection of the first redundant segment on the first plane overlaps with the orthographic projection of the first gap in the first plane. When the support device switches between the unfolded state and the folded state, the first redundant segment can deform. The first plane is perpendicular to the thickness direction of the base.

3. The foldable electronic device according to claim 2, characterized in that, The first redundant segment includes multiple layers of flexible plates stacked together, with air gaps between adjacent layers of the flexible plates.

4. The foldable electronic device according to any one of claims 1-3, characterized in that, The first flexible circuit board includes a second segment and a second redundant segment. The second segment is electrically connected to the first structural member, and the second redundant segment is connected between the second segment and the first segment. When the foldable electronic device is in the unfolded state, there is a second gap between the end of the first support member away from the second main body and the first main body. The orthographic projection of the second redundant segment on the first plane overlaps with the orthographic projection of the second gap in the first plane. When the support device switches between the unfolded state and the folded state, the second redundant segment can deform. The first plane is perpendicular to the thickness direction of the base.

5. The foldable electronic device according to claim 4, characterized in that, Includes a foldable screen, which is disposed on the supporting device; The first main body is provided with a first groove, the first groove including a first groove sidewall, and when the support device is in the unfolded state, the first groove sidewall faces the second main body; The first main body is also provided with a first clearance groove, which penetrates the side wall of the first groove and the surface of the first main body facing the folding screen, and the first clearance groove forms at least part of the second gap.

6. The foldable electronic device according to claim 5, characterized in that, The first groove sidewall includes a first region and a second region arranged in a first direction. When the foldable electronic device is in the unfolded state, the first region is recessed relative to the second region in a direction away from the first support member to form the first clearance groove, wherein the first direction is parallel to the axis of rotation of the first main body relative to the second main body.

7. The foldable electronic device according to any one of claims 1-6, characterized in that, include: A foldable screen is disposed on the supporting device, and a first space is provided between the foldable screen and the supporting device, wherein at least a portion of the first flexible circuit board is disposed within the first space.

8. The foldable electronic device according to claim 7, characterized in that, include: A support sheet is stacked on the side of the folding mechanism closest to the folding screen, and at least a portion of the support sheet is fixed to the folding mechanism. A portion of the first flexible circuit board is disposed between the folding mechanism and the support sheet.

9. The foldable electronic device according to claim 8, characterized in that, The support piece is an insulating component, or the surface of the support piece facing away from the folding screen is provided with an insulating layer.

10. The foldable electronic device according to any one of claims 1-9, characterized in that, The folding mechanism includes a shaft cover and an intermediate support member. At least a portion of the shaft cover is located on one side of the intermediate support member in the thickness direction. The first flexible circuit board includes a first intermediate segment. The orthographic projection of the first intermediate segment on a first plane overlaps with the orthographic projection of the intermediate support member on the first plane. The first plane is perpendicular to the thickness direction of the base.

11. The foldable electronic device according to claim 10, characterized in that, At least a portion of the first intermediate segment is fixed to the base.

12. The foldable electronic device according to claim 10, characterized in that, During the process of switching between the unfolded state and the folded state, the first intermediate section of the support device can deform.

13. The foldable electronic device according to claim 12, characterized in that, At least a portion of the first intermediate section arches toward the shaft cover.

14. The foldable electronic device according to claim 12 or 13, characterized in that, The first intermediate section is located on the side of the intermediate support member facing away from the shaft cover. The intermediate support member is provided with a receiving groove recessed toward the shaft cover. When the support device is in the unfolded state, at least a portion of the first flexible circuit board is located in the receiving groove.

15. The foldable electronic device according to any one of claims 10-14, characterized in that, Includes a foldable screen, which is disposed on the supporting device; The first section is located on the side of the first support member closest to the folding screen, and the first middle section is located on the side of the middle support member closest to the folding screen; or, the first section is located on the side of the first support member opposite to the folding screen, and the first middle section is located on the side of the middle support member opposite to the folding screen.

16. The foldable electronic device according to any one of claims 1-15, characterized in that, Includes a foldable screen, which is disposed on the supporting device; The first flexible circuit board includes a second section, which is electrically connected to the first structural member. The second section is located on the side of the first main body near the folding screen, and the first section is located on the side of the first support member near the folding screen.

17. The foldable electronic device according to any one of claims 1-16, characterized in that, The first support member is provided with a first groove, which penetrates one side surface of the first support member in the thickness direction, and the first section is disposed in the first groove.

18. The foldable electronic device according to claim 17, characterized in that, The first support member includes a first outer side and a first inner side facing away from each other. When the support device is in the unfolded state, the first inner side faces the second main body, and the first sink groove passes through the first outer side and the first inner side.

19. The foldable electronic device according to any one of claims 1-14, characterized in that, The first support member is provided with a first through hole, which penetrates both sides of the first support member in the thickness direction, and the first section passes through the first through hole.

20. The foldable electronic device according to any one of claims 1-19, characterized in that, The first structural component is a first circuit board, and the second structural component is a second circuit board; The first main body includes a first housing, the first housing having a first receiving cavity, and the first circuit board disposed within the first receiving cavity.

21. The foldable electronic device according to claim 20, characterized in that, It includes a second flexible circuit board, the two ends of which are electrically connected to the first circuit board and the second circuit board, respectively; One of the first flexible circuit board and the second flexible circuit board is used to transmit radio frequency signals.

22. The foldable electronic device according to claim 21, characterized in that, The first flexible circuit board and the second flexible circuit board are spaced apart in a first direction, which is parallel to the axis of rotation of the first main body relative to the second main body.

23. The foldable electronic device according to claim 21 or 22, characterized in that, At least a portion of the first flexible circuit board is spaced apart from the second flexible circuit board in the thickness direction of the base.

24. The foldable electronic device according to any one of claims 20-23, characterized in that, The second flexible circuit board includes a first connecting segment, which and the first section are located on opposite sides of the thickness direction of the first support member.

25. The foldable electronic device according to any one of claims 20-24, characterized in that, The first housing is provided with a first through hole and a second through hole. The first flexible circuit board passes through the first through hole and is electrically connected to the first circuit board. The second flexible circuit board passes through the second through hole and is electrically connected to the first circuit board. The first through hole and the second through hole are opened on two different walls of the first main body.

26. The foldable electronic device according to any one of claims 1-25, characterized in that, The first structural component is a first grounding metal, and the second structural component is a second grounding metal.

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