Foldable electronic device

Abstract

The present application provides a foldable electronic device, which includes a rotating shaft assembly, a support assembly, a flexible circuit board, and a flexible display screen; the support assembly includes a first support plate and a second support plate; when the first support plate and the second support plate are in a fully unfolded state, a receiving gap is reserved between the first support plate and the second support plate; the flexible circuit board includes a first connection portion, a pre-bending portion, and a second connection portion, and the pre-bending portion corresponds to the receiving gap between the first support plate and the second support plate in the fully unfolded state and bends convexly toward the opposite side of the receiving gap; the flexible display screen is disposed across the rotating shaft assembly and connected to the support assembly to switch between a folded state and an unfolded state along with the first support plate and the second support plate. This electronic device has the characteristics of high connection reliability, small dynamic bending area, and long bending life; in addition, since the flexible circuit board does not need to penetrate the rotating shaft, the structure and the assembly process are relatively simple, saving the manufacturing cost of the electronic device.

Description

Technical Field

[0001] The present invention relates to the technical field of the flexible circuit board setting structure of foldable electronic devices, and specifically relates to a foldable electronic device. Background Art

[0002] With the maturity of flexible display technology, flexible displays have been increasingly used in foldable electronic devices. However, due to the unreasonable design of other component structures, such as the unreasonable position of the flexible circuit board inside the electronic device and its connection relationship with other components, the connection reliability is very poor. There are also designs that make the structure complex in order to improve reliability, resulting in difficult installation and increased costs; currently, there is no flexible display electronic device with a simple structure and high reliability. Summary of the Invention

[0003] An embodiment of the present application provides a foldable electronic device, including:

[0004] A rotating shaft assembly;

[0005] A support assembly, including a first support plate and a second support plate; the first support plate and the second support plate are respectively connected to opposite sides of the rotating shaft assembly, and the first support plate and the second support plate can rotate relative to the rotating shaft assembly to switch between a folded state and an unfolded state; wherein, when the first support plate and the second support plate are in a fully unfolded state, a receiving gap is reserved between the first support plate and the second support plate;

[0006] A flexible circuit board, the flexible circuit board includes an integrally structured first connection portion, a pre-bending portion, and a second connection portion, and the pre-bending portion is disposed between the first connection portion and the second connection portion; the first connection portion and the second connection portion of the flexible circuit board are respectively used for electrically connecting functional devices disposed on both sides of the first support plate and the second support plate; the flexible circuit board straddles the rotating shaft assembly, and the first connection portion and the second connection portion are respectively fixedly connected to the first support plate and the second support plate, and the pre-bending portion corresponds to the receiving gap between the first support plate and the second support plate in the fully unfolded state and is bent convexly toward the opposite side of the receiving gap;

[0007] A flexible display screen, straddling the rotating shaft assembly and connected to the first support plate and the second support plate to switch between a folded state and an unfolded state along with the first support plate and the second support plate.

[0008] The foldable electronic device provided by the embodiment of the present application forms a dynamic bending redundancy at the bending area of the flexible circuit board within the accommodation gap reserved between the two side support plates, compensating for the length difference caused by different bending radii of the flexible circuit board and the flexible display screen. It has the characteristics of high connection reliability, small dynamic bending area, and long bending life. In addition, since the flexible circuit board does not need to penetrate the rotating shaft, the structure and the assembly process are relatively simple, saving the manufacturing cost of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 is the overall structural schematic diagram of the foldable electronic device of the present application in the unfolded state of an embodiment;

[0011] Figure 2 is Figure 1 the overall structural schematic diagram of the electronic device in the fully folded state in the embodiment;

[0012] Figure 3 is Figure 1 the structural split schematic diagram of the electronic device in the unfolded state in the embodiment;

[0013] Figure 4 is Figure 3 the structural schematic diagram of the flexible circuit board in the embodiment;

[0014] Figure 5 is Figure 4 the structural cross-sectional schematic diagram of the flexible circuit board at A-A in the embodiment;

[0015] Figure 6 is Figure 1 the structural cross-sectional schematic diagram of the embodiment at B-B;

[0016] Figure 7 is Figure 6 the enlarged schematic diagram of the local structure at C in the embodiment;

[0017] Figure 8 is the structural schematic diagram of the cooperation between the flexible circuit board and the flexible display screen in the bent state;

[0018] Figure 9 is Figure 2 the structural cross-sectional schematic diagram of the electronic device at D-D in the embodiment;

[0019] Figure 10 isFigure 9 Schematic diagram of the enlarged local structure at E in the Chinese context;

[0020] Figure 11 Is Figure 3 Schematic diagram of the local structure of the electronic device in the embodiment;

[0021] Figure 12 Is Figure 11 Schematic diagram of the disassembly of the structure in the embodiment;

[0022] Figure 13 Schematic diagram of the local structure of another embodiment of the electronic device of the present application;

[0023] Figure 14 Is Figure 3 Schematic diagram of the disassembly of the local structure from another perspective of the electronic device in the embodiment;

[0024] Figure 15 Schematic diagram of the block diagram of the structural composition of an embodiment of the electronic device of the present application. Detailed implementation manners

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0026] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present invention. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] "Electronic device" (or simply "terminal") as used herein includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections (such as via the Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection, and / or another data connection / network) and / or via wireless interfaces (such as for cellular networks, Wireless Local Area Networks (WLANs), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters, and / or another communication terminal). A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communication System (PCS) terminals that may combine cellular radiotelephone with data processing, facsimile, and data communication capabilities; PDAs that may include a radiotelephone, pager, Internet / intranet access, Web browser, notepad, calendar, and / or Global Positioning System (GPS) receiver; and conventional laptop and / or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A mobile phone is an electronic device configured with a cellular communication module.

[0028] Please refer to Figures 1 to 3 , Figure 1 which is a schematic diagram of the overall structure of an embodiment of the foldable electronic device of the present application in the unfolded state. Figure 2 is Figure 1 a schematic diagram of the overall structure of the electronic device in the fully folded state in the embodiment; Figure 3 is Figure 1 a schematic diagram of the structural breakdown of the electronic device in the unfolded state in the embodiment; It should be noted that the electronic device in the present application may include electronic devices with a flexible display structure such as mobile phones, tablet computers, laptop computers, wearable devices, etc. The foldable electronic device 10 includes, but is not limited to, the following structural components: a rotating shaft assembly 100, a support assembly 200, a flexible circuit board 300, and a flexible display screen 400. It should be noted that the terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or components inherent to these processes, methods, products, or devices.

[0029] Specifically, in this embodiment, the support assembly 200 includes a first support plate 210 and a second support plate 220; the first support plate 210 and the second support plate 220 are respectively connected to opposite sides of the rotation shaft assembly 100, and the first support plate 210 and the second support plate 220 can rotate relative to the rotation shaft assembly 100 to switch between a folded state ( Figure 2 in state) and an unfolded state ( Figure 1 in state).

[0030] Please refer to Figure 4 and Figure 5 , Figure 4 which Figure 3 is a schematic structural diagram of the flexible circuit board in the embodiment. Figure 5 And Figure 4 is a schematic cross-sectional structural diagram of the flexible circuit board at A-A. Optionally, the flexible circuit board 300 includes an integrally formed first connection portion 310, a pre-bending portion 330, and a second connection portion 320, and the pre-bending portion 330 is disposed between the first connection portion 310 and the second connection portion 320; wherein, the specific bending shapes of the first connection portion 310 and the second connection portion 320 are not specifically limited herein. BTB connectors (311, 321) may be respectively provided at both ends of the first connection portion 310 and the second connection portion 320.

[0031] Optionally, please refer to Figure 6 together with Figure 6 which Figure 1 is a schematic cross-sectional structural diagram at B-B in the embodiment. The first connection portion 310 and the second connection portion 320 of the flexible circuit board 300 are respectively used for electrically connecting the functional devices 500 disposed on both sides of the first support plate 210 and the second support plate 220. Optionally, the functional devices 500 include but are not limited to a battery 510, a circuit board 520, and other devices, such as a camera module, a speaker, etc. In this embodiment, only the case where the functional devices 500 include a battery 510 and a circuit board 520 is used for illustrative purposes. Additionally, the specific installation positions of the battery 510 and the circuit board 520 in this embodiment are not limited to the situations shown in the figures.

[0032] Please refer to Figure 3 and Figure 7 , Figure 7 which Figure 6Schematic diagram of the enlarged partial structure at position C. The flexible circuit board 300 is disposed across the rotating shaft assembly 100, and the first connecting portion 310 and the second connecting portion 320 are respectively fixedly connected to the first support plate 210 and the second support plate 220. When the first support plate 210 and the second support plate 220 are in the fully unfolded state, a receiving gap 201 is reserved between the first support plate 210 and the second support plate 220; the pre-bending portion 330 of the flexible circuit board 300 corresponds to the receiving gap 201 between the first support plate 210 and the second support plate 220 in the fully unfolded state and is bent convexly toward the opposite side of the receiving gap 201.

[0033] Optionally, please continue to refer to Figures 1 to 3 , the flexible display screen 400 is disposed across the rotating shaft assembly 100 and connected to the first support plate 210 and the second support plate 220 to switch between the folded state and the unfolded state along with the first support plate 210 and the second support plate 220. Among them, it should be noted that the electronic device in the embodiment of the present application has an inward-folded screen structure, that is, when the electronic device is in the fully folded state ( Figure 2 in the state), the flexible display screen is located on the inner surface of the electronic device.

[0034] Optionally, the first connecting portion 310 and the second connecting portion 320 of the flexible circuit board 300 are respectively adhered to the non-display surface side of the flexible display screen 400. Please refer to Figure 1 , Figure 2 and Figure 6 , the electronic device is folded back and forth along the Figure 6 arrow direction in the figure. Since the structure of the electronic device in the present application is such that in the folded state, the display surface of the flexible display screen 400 is opposite (that is, an inward-folded screen structure, or in the folded state, the display surface faces inward), the flexible circuit board 300 is equivalent to being attached to the outer side of the flexible display screen 400. Please refer to Figure 8 . Figure 8 is a schematic diagram of the structure of the flexible circuit board and the flexible display screen in the bent state.

[0035] At the bent position of the flexible circuit board 300 and the flexible display screen 400, the bending radii of the two are different. If the flexible circuit board 300 and the flexible display screen 400 are completely attached, the bent area during the folding process will be pulled or wrinkled due to the different bending radii. In view of this, in the embodiment of the present application, a receiving gap is reserved between the two side support plates (the first support plate 210 and the second support plate 220), and then a dynamic bending redundancy (pre-bending portion 330) is formed at the bent area position of the flexible circuit board within the receiving gap to compensate for the length difference generated by the different bending radii of the flexible circuit board and the flexible display screen. For the schematic diagram of the fully unfolded state, please refer toFigure 7 As shown. When the electronic device is in the fully folded state, please refer to Figure 2 , Figure 9 and Figure 10 , Figure 9 is Figure 2 a schematic cross-sectional view of the structure of the electronic device at D-D in the embodiment, Figure 10 is Figure 9 a schematic enlarged view of the partial structure at E in . When the electronic device is in the fully folded state, the pre-bending portion 330 of the flexible circuit board 300 at the bending position just completely fits with the bending area 410 of the flexible display screen 400, and the redundant length of the pre-bending portion 330 just offsets the difference in the bending radius between the flexible circuit board 300 and the flexible display screen 400.

[0036] The electronic device provided by the embodiment of the present application has the characteristics of high connection reliability, small dynamic bending area, and long bending life; in addition, due to the structural solution in the embodiment of the present application, its flexible circuit board does not need to penetrate the rotating shaft, and the structure and the assembly process are relatively simple, saving the manufacturing cost of the electronic device.

[0037] Please refer to Figure 11 and Figure 12 , Figure 11 is Figure 3 a schematic view of the partial structure of the electronic device in the embodiment, Figure 12 is Figure 11 a schematic exploded view of the structure in the embodiment. The rotating shaft assembly 100 in this embodiment further includes a first rotating shaft body 110, a second rotating shaft body 120, and a protective shell 130; the first rotating shaft body 110 and the second rotating shaft body 120 are rotatably connected; wherein, the first rotating shaft body 110 and the second rotating shaft body 120 can respectively include two parts of structures, and the two parts of structures are respectively rotatably connected in a one-to-one correspondence. The protective shell 130 is covered at the rotatably connected position, playing a role in dust prevention and protection of the rotatably connected position. Among them, the specific rotatably connected structure of the first rotating shaft body 110 and the second rotating shaft body 120 can be pivot connection, hinge connection or realized by a gear set structure for rotational connection, etc. The specific rotatably connected structure of the first rotating shaft body 110 and the second rotating shaft body 120 is not described in detail here within the understanding of those skilled in the art.

[0038] Optionally, please refer to Figure 3 and Figure 12, the first support plate 210 further includes a first main support plate 211 and a first sub - support plate 212, and the second support plate 220 includes a second main support plate 221 and a second sub - support plate 222. Among them, the first main support plate 211 and the first sub - support plate 212 are respectively fixedly connected to the first rotating shaft body 110; and the first main support plate 211 and the first sub - support plate 212 are respectively fixedly connected to opposite sides of the first rotating shaft body 110; while the second main support plate 221 and the second sub - support plate 222 are respectively fixedly connected to the second rotating shaft body 120; similarly, the second main support plate 221 and the second sub - support plate 222 are respectively fixedly connected to opposite sides of the second rotating shaft body 120. It should be noted that the terms "first", "second", "third" in the embodiments of the present application are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] Please refer to Figure 7 , the first connecting portion 310 and the second connecting portion 320 of the flexible circuit board 300 are respectively fixedly connected to the first sub - support plate 212 and the second sub - support plate 222; a receiving gap 201 is provided between the first sub - support plate 212 and the second sub - support plate 222, and the pre - bending portion 330 of the flexible circuit board 300 is correspondingly arranged corresponding to the receiving gap 201.

[0040] Optionally, the first connecting portion 310 of the flexible circuit board 300 is arranged between the first sub - support plate 212 and the flexible display screen 400; the second connecting portion 320 is arranged between the second sub - support plate 222 and the flexible display screen 400. Optionally, one side of the first connecting portion 310 and the second connecting portion 320 of the flexible circuit board 300, which is opposite to the first sub - support plate 212 and the second sub - support plate 222, may be adhesively fixed to the non - display surface side of the flexible display screen.

[0041] Optionally, please refer to Figure 4 and Figure 12, positioning holes 301 are respectively provided on the first connecting portion 310 and the second connecting portion 320 of the flexible circuit board 300, and positioning posts (2120, 2220) that cooperate with the positioning holes 301 are respectively provided on the first sub-support plate 212 and the second sub-support plate 222. The cooperation between the positioning holes 301 and the positioning posts (2120, 2220) realizes the positioning of the first connecting portion 310 and the second connecting portion 320 with the first sub-support plate 212 and the second sub-support plate 222 respectively.

[0042] Optionally, please refer to Figure 13 , Figure 13 FIG. is a schematic diagram of a partial structure of another embodiment of the electronic device of the present application. In this embodiment, a first support piece 610 and a second support piece 620 are respectively provided at positions corresponding to the first connecting portion 310 and the second connecting portion 320 of the flexible display screen 400 with respect to the flexible circuit board 300. The first connecting portion 310 and the second connecting portion 320 are respectively bonded to the first support piece 610 and the second support piece 620, and the first support piece 610 and the second support piece 620 are respectively bonded to the flexible display screen 400. Among them, the materials of the first support piece 610 and the second support piece 620 can be metal sheets or hard resin material sheets.

[0043] The technical solution in this embodiment can improve the connection reliability between the flexible circuit board 300 and the flexible display screen 400 by designing the structure of the first support piece 610 and the second support piece 620 made of hard materials between the flexible display screen and the flexible circuit board, ensure the reliable bonding of the first connecting portion 310 and the second connecting portion 320 of the flexible circuit board 300 to the flexible display screen 400, and avoid the occurrence of wrinkles and unevenness of the flexible circuit board 300.

[0044] Please refer to in combination Figure 3 and Figure 14 , Figure 14 is Figure 3Schematic diagram of partial structure disassembly of another perspective of the electronic device in the embodiment. Optionally, the first main support plate 211 in this embodiment includes a first surface 2111 and a second surface 2112 arranged opposite to each other; the second main support plate 221 includes a third surface 2211 and a fourth surface 2212 arranged opposite to each other; when the first main support plate 211 and the second main support plate 221 are in a fully unfolded state, the first surface 2111 and the third surface 2211 are coplanar, and the flexible display screen 400 is connected to the first surface 2111 and the third surface 2211. The specific connection form can be bonding or a sliding connection structure realized by arranging sliding grooves on the sides of the first main support plate 211 and the second main support plate 221, etc., which is not specifically limited here. It should be noted that all directional indicators (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, the directional indicators will also change accordingly.

[0045] Please refer to Figure 6 and Figure 14 , a first accommodation groove 21120 is provided on the second surface 2112 of the first main support plate 211, and a second accommodation groove 22120 is provided on the fourth surface 2212 of the second main support plate 221; the first accommodation groove 21120 and the second accommodation groove 22120 are used to accommodate the functional devices 500 of the electronic device, specifically, they can be used to accommodate functional devices such as the battery 510 and the circuit board 520.

[0046] Optionally, please continue to refer to Figure 14 , the first main support plate 211 is provided with a first through groove 2110, and the first through groove 2110 communicates with the first surface 2111 and the first accommodation groove 21120; the second main support plate 221 is provided with a second through groove 2210, and the second through groove 2210 communicates with the third surface 2211 and the second accommodation groove 22120; partial structures of the first connection portion 310 and the second connection portion 320 of the flexible circuit board 300 are respectively disposed through the first through groove 2110 and the second through groove 2210 to be electrically connected to the functional devices respectively disposed in the first accommodation groove 21120 and the second accommodation groove 22120.

[0047] Please refer to Figure 15 , Figure 15It is a schematic structural block diagram of an embodiment of the electronic device of the present application. The electronic device can be a mobile phone, a tablet computer, a notebook computer, a wearable device, etc. In this embodiment, a mobile phone is taken as an example. The structure of the electronic device 10 may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the flexible display screen 400 in the above embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980 (which can be the circuit board 520 in the foregoing embodiment), and a power supply 990 (which can be the battery 510 in the foregoing embodiment), etc. Among them, the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected to the processor 980; the power supply 990 is used to provide electrical energy for the entire electronic device 10.

[0048] Specifically, the RF circuit 910 is used for receiving and transmitting signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and specifically may include a touch panel 931 and other input devices 932 such as operation buttons; the display unit 940 may include a display panel 941, etc.; the sensor 950 includes an infrared sensor, a laser sensor, etc., and is used for detecting user proximity signals, distance signals, etc.; the speaker 961 and the microphone (or microphone) 962 are connected to the processor 980 through the audio circuit 960 and are used for receiving and transmitting sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing the data information of the electronic device. For the specific structural features of the electronic device, please refer to the relevant descriptions in the above embodiments and will not be introduced in detail here.

[0049] The foldable electronic device provided by the embodiment of the present application forms a dynamic bending redundancy at the bending area position of the flexible circuit board in the accommodation gap reserved between the two side support plates, compensates for the length difference caused by different bending radii of the flexible circuit board and the flexible display screen, and has the characteristics of high connection reliability, small dynamic bending area, and long bending life; in addition, since the flexible circuit board does not need to penetrate the rotating shaft, the structure and the assembly process are relatively simple, saving the manufacturing cost of the electronic device.

[0050] The above are only some embodiments of the present invention, and thus do not limit the protection scope of the present invention. Any equivalent device or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A foldable electronic device, characterized in that, Comprising: A rotating shaft assembly; A support assembly, including a first support plate and a second support plate; the first support plate and the second support plate are respectively connected to opposite sides of the rotating shaft assembly, and the first support plate and the second support plate can rotate relative to the rotating shaft assembly to switch between a folded state and an unfolded state; wherein, when the first support plate and the second support plate are in a fully unfolded state, a receiving gap is reserved between the first support plate and the second support plate; A flexible circuit board, the flexible circuit board includes an integrally structured first connection portion, a pre-bending portion, and a second connection portion, and the pre-bending portion is disposed between the first connection portion and the second connection portion; the first connection portion and the second connection portion of the flexible circuit board are respectively used for electrically connecting functional devices disposed on both sides of the first support plate and the second support plate; the flexible circuit board straddles the rotating shaft assembly, and the first connection portion and the second connection portion are respectively fixedly connected to the first support plate and the second support plate, and the pre-bending portion corresponds to the receiving gap between the first support plate and the second support plate in the fully unfolded state and is bent convexly toward the opposite side passing through the receiving gap; A flexible display screen, straddling the rotating shaft assembly and connected to the first support plate and the second support plate to switch between a folded state and an unfolded state along with the first support plate and the second support plate; In a fully folded state of the electronic device, the pre-bending portion at the bending position fits with the bending area of the flexible display screen, and the redundant length of the pre-bending portion is equal to the difference between the bending radii of the flexible circuit board and the flexible display screen.

2. The electronic device according to claim 1, wherein, The rotating shaft assembly includes a first rotating shaft body and a second rotating shaft body; the first rotating shaft body and the second rotating shaft body are rotationally connected; the first support plate includes a first main support plate and a first sub-support plate, and the second support plate includes a second main support plate and a second sub-support plate; the first main support plate and the first sub-support plate are respectively fixedly connected to the first rotating shaft body; the second main support plate and the second sub-support plate are respectively fixedly connected to the second rotating shaft body; the first connection portion and the second connection portion of the flexible circuit board are respectively fixedly connected to the first sub-support plate and the second sub-support plate; a receiving gap is provided between the first sub-support plate and the second sub-support plate.

3. The electronic device according to claim 2, wherein The first connection portion of the flexible circuit board is disposed between the first sub-support plate and the flexible display screen; the second connection portion is disposed between the second sub-support plate and the flexible display screen.

4. The electronic device according to claim 2, wherein Positioning holes are respectively provided on the first connection portion and the second connection portion of the flexible circuit board, and positioning posts matching the positioning holes are respectively provided on the first sub-support plate and the second sub-support plate, and the positioning holes and the positioning posts cooperate to realize the positioning of the first connection portion and the second connection portion to the first sub-support plate and the second sub-support plate respectively.

5. The electronic device according to claim 4, wherein One side of the first connection portion and the second connection portion of the flexible circuit board opposite to the first sub-support plate and the second sub-support plate is adhesively fixed to the flexible display screen.

6. The electronic device according to claim 5, wherein The flexible display screen is respectively provided with a first support piece and a second support piece at positions corresponding to the first connection part and the second connection part of the flexible circuit board, and the first connection part and the second connection part are respectively bonded to the first support piece and the second support piece.

7. The electronic device according to claim 2, wherein The first main support plate includes a first surface and a second surface arranged opposite to each other; the second main support plate includes a third surface and a fourth surface arranged opposite to each other; when the first main support plate and the second main support plate are in a fully unfolded state, the first surface and the third surface are coplanar, and the flexible display screen is connected to the first surface and the third surface.

8. The electronic device according to claim 7, wherein The second surface of the first main support plate is provided with a first accommodation groove, and the fourth surface of the second main support plate is provided with a second accommodation groove; the first accommodation groove and the second accommodation groove are used for accommodating functional devices of the electronic device.

9. The electronic device according to claim 8, wherein The first main support plate is provided with a first through groove that communicates the first surface and the first accommodation groove; the second main support plate is provided with a second through groove that communicates the third surface and the second accommodation groove; partial structures of the first connection part and the second connection part of the flexible circuit board respectively pass through the first through groove and the second through groove to be electrically connected to the functional devices respectively arranged in the first accommodation groove and the second accommodation groove.

10. The electronic device according to claim 1, characterized in that, When the electronic device is in a folded state, the display surfaces of the flexible display screens face each other.

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