Flexible circuit board and electronic equipment

Abstract

The utility model discloses a flexible circuit board and electronic equipment, and belongs to the technical field of display. The flexible circuit board comprises a circuit board body, a first connector, a switching circuit board and at least one functional component. The switching circuit board and the at least one functional component are arranged in the flexible circuit board, and the switching circuit board can be used for transmitting a part of signals for communication between the first connector and the at least one functional component. Therefore, even if at least one functional component is integrated in the flexible circuit board, normal signal transmission between the first connector and the at least one functional component can be ensured. Therefore, a circuit board for realizing different functions does not need to be independently arranged in the electronic equipment. Thus, it can be ensured that the flexible circuit board not only can achieve the signal transmission function, but also can achieve the functions of functional components integrated inside, and therefore the functions of the flexible circuit board can be effectively enriched.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a flexible circuit board and an electronic device. Background Art

[0002] With the development of terminal technology, more and more terminal devices will be equipped with foldable display screens. Terminal devices equipped with foldable display screens can generally be called foldable display devices. The application of foldable display screens can realize the switching of the physical size of terminal devices, bringing a better user experience.

[0003] Generally, a foldable display device usually includes: a foldable housing, and a foldable display panel connected to the foldable housing, and a foldable flexible circuit board is usually installed in the foldable housing.

[0004] However, currently, the flexible circuit boards that can be folded are usually only integrated with signal connectors for communication connection with other circuit boards, so that they can perform some simple signal transmission. Therefore, the functions of the current flexible circuit boards are relatively simple. Utility Model Content

[0005] The embodiment of the present application provides a flexible circuit board and an electronic device. The problem that the flexible circuit board has a relatively single function can be solved. The technical solution is as follows:

[0006] In one aspect, a flexible circuit board is provided, the flexible circuit board comprising:

[0007] A circuit board body, the circuit board body comprising: a first main body portion and a second main body portion, and a connecting portion for connecting the first main body portion and the second main body portion;

[0008] a first connector connected to an end of the first main body away from the connecting portion;

[0009] And, a transfer circuit board and at least one functional component electrically connected to the second main body, the transfer circuit board being closer to the connection portion than the at least one functional component.

[0010] Optionally, the second main body portion includes: a first sub-portion covered by the adapter circuit board, the first sub-portion being connected to a side of the connecting portion away from the first main body portion, and the first sub-portion being electrically connected to the adapter circuit board;

[0011] The first sub-part is used to transmit a part of the signal for communication between the at least one functional component and the first connector, and the adapter circuit board is used to transmit another part of the signal for communication between the at least one functional component and the first connector.

[0012] Optionally, the shape of the first sub-portion matches the shape of the adapter circuit board.

[0013] Optionally, the second main body portion further includes: a second sub-portion connected to an end of the first sub-portion away from the connecting portion;

[0014] The at least one functional component includes: a display control section located on the second subsection and electrically connected to the second subsection.

[0015] Optionally, the second main body portion further includes: a third sub-portion connected to an end of the first sub-portion away from the connecting portion;

[0016] The at least one functional component includes: a socket located on the third sub-portion and electrically connected to the third sub-portion.

[0017] Optionally, in the case where the second main body portion includes both the second sub-portion and the third sub-portion, the second sub-portion and the third sub-portion are arranged side by side, and the second sub-portion is closer to the first sub-portion than the third sub-portion; the second main body portion further includes: a bridging sub-portion;

[0018] The second sub-portion is directly connected to an end of the first sub-portion away from the connecting portion, and the third sub-portion is connected to an end of the first sub-portion away from the connecting portion through the bridging sub-portion.

[0019] Optionally, the second main body portion further includes: a fourth sub-portion connected to a side of the third sub-portion facing away from the second sub-portion;

[0020] The at least one functional component further includes: an antenna circuit located on the fourth sub-portion, wherein the antenna circuit has an abutting spring sheet.

[0021] Optionally, the flexible circuit board further includes: a fixing member connected to the first main body portion, the fixing member being closer to the connecting portion than the first connector;

[0022] Wherein, the fixing member and the adapter circuit board are respectively distributed on both sides of the connecting portion.

[0023] Optionally, a width of the connecting portion is greater than a width of the first main body portion, and the number of conductive layers in the connecting portion is less than the number of conductive layers in the first main body portion.

[0024] On the other hand, an electronic device is provided, comprising: a foldable housing, a foldable display panel connected to one side of the foldable housing, and a flexible circuit board distributed in the foldable housing, wherein the flexible circuit board is any of the flexible circuit boards described above.

[0025] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0026] A flexible circuit board includes: a circuit board body, a first connector, a transfer circuit board and at least one functional component. Since the transfer circuit board and the at least one functional component are arranged in the flexible circuit board, and the transfer circuit board can be used to transmit a part of the signal for communication between the first connector and the at least one functional component. Therefore, even if at least one functional component is integrated in the flexible circuit board, it can be ensured that the signal can be normally transmitted between the first connector and the at least one functional component. In this way, it is only necessary to integrate the functional components for realizing different functions on the flexible circuit board, and there is no need to separately set up circuit boards for realizing different functions in the electronic device. In this way, it can be ensured that the flexible circuit board can not only realize the function of signal transmission, but also realize the functions of the internally integrated functional components, thereby effectively enriching the functions of the flexible circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of the back structure of a flexible circuit board provided in an embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the front structure of a flexible circuit board provided in an embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the back structure of another flexible circuit board provided in an embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the exploded structure of a flexible circuit board provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0034] At present, in the related art, a foldable flexible circuit board is usually installed in the foldable housing of the foldable display device. At present, the foldable flexible circuit board is usually only integrated with a signal connector for communication connection with other circuit boards, so that it can perform some simple signal transmission. In this way, the function of the foldable flexible circuit board is relatively single.

[0035] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural diagram of an electronic device provided in an embodiment of the present application, Figure 2 000 is a schematic diagram of the back structure of a flexible circuit board provided in an embodiment of the present application. The flexible circuit board 000 can be integrated in an electronic device 001. The electronic device 001 can be a foldable display device.

[0036] The flexible circuit board 000 may include: a circuit board body 100 , a first connector 200 , a transfer circuit board 400 (not marked in the figure) and at least one functional component 300 .

[0037] The circuit board body 100 in the flexible circuit board 000 may include: a first main body 101 and a second main body 102, and a connecting portion 103 for connecting the first main body 101 and the second main body 102. The first main body 101 and the second main body 102 in the circuit board body 100 may be respectively used to be set in two first housings 002 in the electronic device 001, and the connecting portion 103 in the circuit board body 100 may be used to be set in the second housing 003 in the electronic device 001. Here, in the electronic device 001, the second housing 003 may be distributed between the two first housings 002, and the second housing 003 may be rotatably connected to the first housing 002. In this way, by rotating the second housing 003 and the first housing 002 toward or away from each other, the electronic device 001 can be placed in a folded state or an unfolded state. Since the flexible circuit board 000 is relatively soft as a whole, the connecting portion 103 distributed in the second housing 003 can be bent during the switching process between the folded state and the unfolded state of the electronic device 001. For this reason, the flexible circuit board disposed inside the electronic device 001 does not interfere with the folding and unfolding of the electronic device 001 .

[0038] In this application, please refer to Figure 2 The first connector 200 in the flexible circuit board 000 can be connected to the end of the first main body 101 in the circuit board body 100 away from the connecting portion 103. The first connector 200 can be used to be electrically connected to the mainboard in the electronic device 001.

[0039] The adapter circuit board 400 and at least one functional component 300 in the flexible circuit board 000 can be electrically connected to the second main body 102 in the circuit board body 100, and the adapter circuit board 400 can be closer to the connection part 103 in the circuit board body 100 relative to the at least one functional component 300. Here, at least a portion of the second main body 102 can be used to transmit a portion of the signal for communication between the first connector 200 and the at least one functional component 300, and the adapter circuit board 400 can be used to transmit another portion of the signal for communication between the first connector 200 and the at least one functional component 300.

[0040] In the embodiment of the present application, since the adapter circuit board 400 and at least one functional component 300 are provided in the flexible circuit board 000, and the adapter circuit board 400 can be used to transmit a part of the signal for communication between the first connector 200 and the at least one functional component 300. Therefore, even if at least one functional component 300 is integrated in the flexible circuit board 000, it can be ensured that the first connector 200 and the at least one functional component 300 can transmit signals normally. In this way, it is only necessary to integrate the functional components 300 for realizing different functions on the flexible circuit board 000, and there is no need to separately set up circuit boards for realizing different functions in the electronic device 001. In this way, the assembly process of the electronic device 001 is effectively simplified, thereby improving the assembly efficiency of the electronic device 001.

[0041] In summary, the flexible circuit board provided in the embodiment of the present application includes: a circuit board body, a first connector, a transfer circuit board and at least one functional component. Since the transfer circuit board and at least one functional component are arranged in the flexible circuit board, and the transfer circuit board can be used to transmit a part of the signal for communication between the first connector and the at least one functional component. Therefore, even if at least one functional component is integrated in the flexible circuit board, it can be ensured that the signal can be transmitted normally between the first connector and the at least one functional component. In this way, it is only necessary to integrate the functional components for realizing different functions on the flexible circuit board, and there is no need to separately set up circuit boards for realizing different functions in the electronic device. In this way, it can be ensured that this flexible circuit board can not only realize the function of signal transmission, but also realize the functions of the internally integrated functional components, thereby effectively enriching the functions of this flexible circuit board.

[0042] In the examples of this application, please refer to Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the front structure of a flexible circuit board provided in an embodiment of the present application, Figure 41 is a schematic diagram of the back structure of another flexible circuit board provided in an embodiment of the present application. The second main body 102 in the circuit board body 100 may include: a first sub-portion 1021 covered by the adapter circuit board 400. Here, the first sub-portion 1021 in the second main body 102 may be connected to the side of the connection portion 103 in the circuit board body 100 away from the first main body 101, and the first sub-portion 1021 in the second main body 102 may be electrically connected to the adapter circuit board 400.

[0043] The first sub-portion 1021 in the second main body 102 can be used to transmit a part of the signal for communication between the first connector 200 and at least one functional component 300, and the adapter circuit board 400 can be used to transmit another part of the signal for communication between the first connector 200 and at least one functional component 300. In this way, the signal for communication between the first connector 200 and at least one functional component 300 can be transmitted through the first sub-portion 1021 in the second main body 102, and can also be transmitted through the adapter circuit board 400, so as to ensure that the first connector 200 and at least one functional component 300 can be completely transmitted, so that the flexible circuit board 000 can normally integrate at least one functional component 300.

[0044] In this application, if Figure 3 As shown, the shape of the first sub-portion 1021 in the second body portion 102 can match the shape of the adapter circuit board 400. For example, the shape of the first sub-portion 1021 in the second body portion 102 and the shape of the adapter circuit board 400 can both be L-shaped.

[0045] Here, the adapter circuit board 400 can be fixed on the first sub-part 1021 in the second main body 102 by SMD welding, and one end of the adapter circuit board 400 and one end of the first sub-part 1021 can be electrically connected to one end of the connecting part 103 away from the first main body 101, and the other end of the adapter circuit board 400 and the other end of the first sub-part 1021 can be electrically connected to at least one functional component 300 provided on the second main body 102. In this way, after the first connector 200 receives the signals sent by the motherboard, these signals can be transmitted to at least one functional component 400 through the first sub-part 1021 after passing through the first main body 101 and the connecting part 103 in sequence, and the other part of the signals can be transmitted to at least one functional component 400 through the adapter circuit board 400, so as to ensure that these functional components 400 can achieve corresponding functions.

[0046] In the examples of this application, please refer to Figure 3 and Figure 4The second main body portion 102 in the circuit board body 100 may further include: a second sub-portion 1022 connected to an end of the first sub-portion 1021 away from the connecting portion 103 in the circuit board body 100 .

[0047] Optionally, at least one functional component 300 may include: a display control unit 301 located on the second sub-part 1022 in the second main body 102 and electrically connected to the second sub-part 1022 in the second main body 102, and the display control unit 301 can be used to electrically connect to the main screen and / or sub-screen in the electronic device 001.

[0048] Here, the display control unit 301 can be used to drive the main screen and / or the sub-screen in the electronic device 001 to display a picture. For example, after the first connector 200 receives the control information sent by the mainboard for the main screen and / or the sub-screen to display a picture, the display control unit 301 can control the main screen and / or the sub-screen in the electronic device 001 to display a picture according to the control information.

[0049] In the embodiment of the present application, the display control unit 301 may include: a driving circuit 3011, a second connector 3012 and a third connector 3013. The second connector 3012 may be used to plug with the main screen in the electronic device 001, and the third connector may be used to plug with the secondary screen in the electronic device 001.

[0050] For example, each device in the display control unit 301 can be fixed on the second sub-part 1022 in the second main body 102 by SMD welding. In this way, the display control unit 301 can be integrated into the flexible circuit board 000, so that the flexible circuit board 000 can have the function of driving the main screen and / or the sub-screen in the electronic device 001 to display the corresponding screen.

[0051] In this application, if Figure 3 and Figure 4 As shown, the second body portion 102 in the circuit board body 100 may include: a third sub-portion 1023 connected to an end of the first sub-portion 1021 in the second body portion 102 facing away from the connecting portion 103 in the circuit board body 100 .

[0052] Optionally, at least one functional component 300 may include: a card holder 302 located on the third sub-portion 1023 in the second main body 102 and electrically connected to the third sub-portion 1023. The card holder 302 may be used to accommodate a card body inserted into the electronic device 001. Here, the card body inserted into the electronic device 001 may include: a SIM card and / or a memory card.

[0053] For example, the card holder 302 can be fixed on the third sub-portion 1023 in the second main body 102 by patch welding. In this way, the card holder 302 can be integrated into the flexible circuit board 000, so that the flexible circuit board 000 can have the function of accommodating the card body, and after the card holder 302 accommodates the card body, the electronic device 001 can realize the function corresponding to the card body through the communication connection between the card holder 302 and the first connector 301. For example, when the card holder 302 accommodates a SIM card, the electronic device 001 can communicate based on the SIM card; when the card holder 302 accommodates a memory card, the electronic device 001 can store information in the accommodated card.

[0054] It should be noted that the flexible circuit board 000 in the embodiment of the present application may integrate only the display control unit 301 or only the card holder 302 . Of course, the flexible circuit board 000 may also integrate both the display control unit 301 and the card holder 302 .

[0055] Among them, when the flexible circuit board 000 integrates the display control unit 301 and the card holder 302 at the same time, the second main body 102 in the circuit board body 100 needs to include the second sub-part 1022 and the third sub-part 1023 at the same time, and in this case, the second sub-part 1022 and the third sub-part 1023 in the second main body 102 can be distributed side by side, and in this second main body 102, the second sub-part 1022 can be closer to the first sub-part 1021 relative to the third sub-part 1023.

[0056] Here, the second body part 102 in the circuit board body 100 may further include: a bridging sub-part 1024. The second sub-part 1022 in the second body part 102 may be directly connected to an end of the first sub-part 1021 away from the connecting part 103, and the third sub-part 1023 in the second body part 102 may be connected to an end of the first sub-part 1021 away from the connecting part 103 through the bridging sub-part 1024.

[0057] In this case, the signal for communication between the first connector 200 and the display control unit 301 can be directly transmitted through the transfer circuit board 400 and the first sub-part 1021 in the second main body 102. The signal for communication between the first connector 200 and the card holder 302 can be transmitted through the transfer circuit board 400 and the first sub-part 1021 and the jumper sub-part 1024 in the second main body 102.

[0058] In the embodiments of the present application, Figure 3 and Figure 4 As shown, the second main body 102 in the circuit board body 100 may further include: a fourth sub-portion 1025 connected to a side of the third sub-portion 1023 facing away from the second sub-portion 1022 .

[0059] Optionally, the at least one functional component 300 may further include: an antenna circuit 303 located on the fourth sub-portion 1025 in the second main body 102. The antenna circuit 303 may have an abutting spring sheet, and the abutting spring sheet may be used to abut against an antenna in the electronic device 001.

[0060] For example, each device in the antenna circuit 303 can be fixed on the fourth sub-portion 1025 in the second main body 102 by patch welding. In this way, the antenna circuit 303 can be integrated in the flexible circuit board 000, so that the flexible circuit board 000 can have the function of connecting with the antenna. Here, after the abutting spring in the antenna circuit 303 abuts against the antenna, through the communication connection between the antenna circuit 303 and the first connector 301, the mainboard in the electronic device 001 can radiate wireless signals outward or receive external wireless signals through the antenna, so as to ensure that the electronic device 001 can have the function of wireless communication.

[0061] In this application, please refer to Figure 5 , Figure 5 000 may further include: a fixing member 500 connected to the first main body 101 in the circuit board body 100. Here, the fixing member 500 in the flexible circuit board 000 may be closer to the connecting portion 103 in the circuit board body 100 relative to the first connector 200.

[0062] The fixing member 500 in the flexible circuit board 000 and the adapter circuit board 400 can be respectively distributed on both sides of the connection part 103 in the circuit board body 100, and the fixing member 500 in the flexible circuit board 000 and the adapter circuit board 400 can be respectively used to be snapped into the two first housings 002 in the electronic device 001. In this way, the connection part 103 in the circuit board body 100 can be better fixed to the second housing 003 through the fixing member 500 and the adapter circuit board 400, so as to ensure that the connection part 103 in the circuit board body 100 is not easy to be misplaced in any direction during the folding or unfolding of the electronic device 001, so as to ensure that the stability of the flexible circuit board 000 set in the electronic device 001 is high, and thus the reliability of the electronic device 001 is high.

[0063] For example, the fixing member 500 in the flexible circuit board 000 belongs to the reinforcement structure in the flexible circuit board 000 , and the fixing member 500 can be fixed on the first main body portion 101 in the circuit board body 100 by bonding.

[0064] In the embodiments of the present application, Figure 4 and Figure 5As shown, the flexible circuit board 000 may further include: a first reinforcing plate 600 connected to the connecting portion 103 in the circuit board body 100. The connecting portion 103 in the circuit board body 100 may be fixed in the second housing 003 by the first reinforcing plate 600, thereby further reducing the probability of the connecting portion 103 in the circuit board body 100 being misaligned. For example, the first reinforcing plate 600 may be fixed to the connecting portion 103 in the circuit board body 100 by bonding.

[0065] Optional, such as Figure 5 As shown, the flexible circuit board 000 may further include: a second reinforcing plate 700 fixedly connected to the side of the first main body 101 in the circuit board body 100 away from the first connector 200. The second reinforcing plate 700 in the flexible circuit board 000 may be used to strengthen the strength of the portion of the first main body 101 where the first connector 200 is arranged, so that the stability of the first connector 200 arranged on this portion of the first main body 101 is higher. For example, the second reinforcing plate 700 may be fixed to the side of the first main body 101 away from the first connector 200 by bonding.

[0066] Optional, such as Figure 5 As shown, the flexible circuit board 000 may further include: a third reinforcing plate 800 fixedly connected to the side of the second sub-portion 1012 in the circuit board body 100 away from the display control unit 301. The third reinforcing plate 800 in the flexible circuit board 000 may be used to strengthen the strength of the second sub-portion 1012, so that the stability of the display control unit 301 set on the second sub-portion 1012 is higher. For example, the second reinforcing plate 700 may be fixed to the side of the second sub-portion 1012 away from the display control unit 301 by bonding.

[0067] Optional, such as Figure 5 As shown, the flexible circuit board 000 may further include: a fourth reinforcing plate 900 fixedly connected to the side of the third sub-portion 1023 in the second main body 102 away from the card holder 302. The fourth reinforcing plate 900 in the flexible circuit board 000 may be used to strengthen the strength of the third sub-portion 1023, so that the card holder 302 disposed on the third sub-portion 1023 has higher stability. For example, the fourth reinforcing plate 900 may be fixed to the side of the third sub-portion 1023 away from the card holder 302 by bonding.

[0068] It should be noted that in the flexible circuit board 000 provided in the embodiment of the present application, the first connector 200, the first reinforcement plate 600 and the at least one functional component 300 in the flexible circuit board 000 can be arranged on one side of the circuit board body 100, and the adapter circuit board 400, the fixing member 500, the second reinforcement plate 700, the third reinforcement plate 800 and the fourth reinforcement plate 900 in the flexible circuit board 000 can be arranged on the other side of the circuit board body 100, and the side of the circuit board body 100 where the adapter circuit board 400 is arranged is closer to the folding display panel in the electronic device 001 than the side where the first connector 200 is arranged.

[0069] In an embodiment of the present application, at least one functional component 300 is arranged on one side of the circuit board body 100, and the adapter circuit board 400 is arranged on the other side of the circuit board body 100, so as to ensure that the circuit arrangement within the adapter circuit board 400 will not affect the circuit arrangement within at least one functional component 300, so that the two parts are less interfered when transmitting signals.

[0070] In the embodiments of the present application, Figure 3 As shown, the width d1 of the connection part 103 in the circuit board body 100 can be greater than the width d2 of the first main body 101 in the circuit board body 100, and the number of conductive layers in the connection part 103 in the circuit board body 100 can be less than the number of conductive layers in the first main body 101 in the circuit board body 100. In this way, the thickness of the connection part 103 in the circuit board body 100 can be ensured to be thinner, so that the connection part 103 can be bent more easily, so that the stress on the connection part 103 in the circuit board body 100 is small during the switching process between the folded state and the unfolded state of the electronic device 001, and at the same time, the probability of the signal routing integrated in the connection part 103 in the circuit board body 100 being damaged can be ensured to be low.

[0071] In summary, the flexible circuit board provided in the embodiment of the present application includes: a circuit board body, a first connector, a transfer circuit board and at least one functional component. Since the transfer circuit board and at least one functional component are arranged in the flexible circuit board, and the transfer circuit board can be used to transmit a part of the signal for communication between the first connector and the at least one functional component. Therefore, even if at least one functional component is integrated in the flexible circuit board, it can be ensured that the signal can be transmitted normally between the first connector and the at least one functional component. In this way, it is only necessary to integrate the functional components for realizing different functions on the flexible circuit board, and there is no need to separately set up circuit boards for realizing different functions in the electronic device. In this way, it can be ensured that this flexible circuit board can not only realize the function of signal transmission, but also realize the functions of the internally integrated functional components, thereby effectively enriching the functions of this flexible circuit board.

[0072] The embodiment of the present application also provides an electronic device, which may include: a folding housing, a folding display panel connected to one side of the folding housing, and a flexible circuit board distributed in the folding housing, wherein the flexible circuit board is any of the above-mentioned flexible circuit boards. The folding housing may include: two first housings and a second housing distributed between the two first housings, and the second housing is rotatably connected to the first housing.

[0073] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0074] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible circuit board, characterized in that: The flexible circuit board comprises: A circuit board body, the circuit board body comprising: a first main body portion and a second main body portion, and a connecting portion for connecting the first main body portion and the second main body portion; a first connector connected to an end of the first main body away from the connecting portion; And, a transfer circuit board and at least one functional component electrically connected to the second main body, the transfer circuit board being closer to the connection portion than the at least one functional component.

2. The flexible circuit board according to claim 1, characterized in that: The second main body portion includes: a first sub-portion covered by the adapter circuit board, the first sub-portion is connected to a side of the connecting portion away from the first main body portion, and the first sub-portion is electrically connected to the adapter circuit board; The first sub-part is used to transmit a part of the signal for communication between the at least one functional component and the first connector, and the adapter circuit board is used to transmit another part of the signal for communication between the at least one functional component and the first connector.

3. The flexible circuit board according to claim 2, characterized in that: The shape of the first sub-portion matches the shape of the adapter circuit board.

4. The flexible circuit board according to claim 2, characterized in that: The second main body portion further includes: a second sub-portion connected to an end of the first sub-portion away from the connecting portion; The at least one functional component includes: a display control section located on the second subsection and electrically connected to the second subsection.

5. The flexible circuit board according to claim 2, characterized in that: The second main body portion further includes: a third sub-portion connected to an end of the first sub-portion away from the connecting portion; The at least one functional component includes: a socket located on the third sub-portion and electrically connected to the third sub-portion.

6. The flexible circuit board according to any one of claims 2 to 5, characterized in that: In the case where the second main body portion includes both the second sub-portion and the third sub-portion, the second sub-portion and the third sub-portion are arranged side by side, and the second sub-portion is closer to the first sub-portion than the third sub-portion; The second main body portion further includes: a bridging sub-portion; The second sub-portion is directly connected to an end of the first sub-portion away from the connecting portion, and the third sub-portion is connected to an end of the first sub-portion away from the connecting portion through the bridging sub-portion.

7. The flexible circuit board according to claim 6, characterized in that: The second main body portion further includes: a fourth sub-portion connected to a side of the third sub-portion facing away from the second sub-portion; The at least one functional component further includes: an antenna circuit located on the fourth sub-portion, wherein the antenna circuit has an abutting spring sheet.

8. The flexible circuit board according to any one of claims 1 to 5, characterized in that: The flexible circuit board further includes: a fixing member connected to the first main body portion, the fixing member being closer to the connecting portion than the first connector; Wherein, the fixing member and the adapter circuit board are respectively distributed on both sides of the connecting portion.

9. The flexible circuit board according to any one of claims 1 to 5, characterized in that: The width of the connecting portion is greater than the width of the first main body portion, and the number of conductive layers in the connecting portion is less than the number of conductive layers in the first main body portion.

10. An electronic device, characterized in that: The electronic device comprises: a foldable housing and a flexible circuit board as claimed in any one of claims 1 to 9; Wherein, the folding housing comprises: two first housings, and a second housing distributed between the two first housings, and the second housing is rotatably connected to the first housing; The first main body and the second main body of the flexible circuit board are respectively arranged in the two first housings, and the connecting portion of the flexible circuit board is arranged in the second housing.

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