Flexible printed circuit and electronic device

Abstract

The present application relates to the technical field of electronic products, and in particular to a flexible printed circuit and an electronic device. The flexible printed circuit is configured to connect a USB interface and a mainboard in an electronic device. The flexible printed circuit comprises two flexible boards, namely, a first flexible board and a second flexible board, which are detachably connected to each other, wherein the first flexible board is arranged on the rear side of a battery and is connected to the USB interface, and the second flexible board is arranged on the front side of the battery and is connected to the mainboard. When it is necessary to disassemble the USB interface, the first flexible board can be seen by opening a cover plate on the rear side of the electronic device, and since the first flexible board is detachably connected to the second flexible board, the first flexible board can be quite easily disconnected from the second flexible board, the first flexible board is removed, and subsequent processing is then performed on the USB interface. Thus, there is no need to disassemble the battery, the step of disassembling the USB interface is simplified, the complexity of disassembly can be reduced, and there is no need to re-mount the battery, thereby reducing the assembly difficulty and the maintenance cost.

Description

Flexible circuit boards and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 1, 2023, with application number 202311444392.6 and application name “Flexible Circuit Board and Electronic Device”. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to a flexible circuit board and an electronic device. Background Art

[0003] The Universal Serial Bus (USB) is a universal computer interface that has become one of the primary methods for data transmission and power supply between modern electronic devices. Almost every electronic device is equipped with a USB port for connecting chargers, data cables, headphones, etc.

[0004] In electronic devices, the USB interface needs to be electrically connected to the motherboard through a flexible printed circuit (FPC) to achieve the above-mentioned functions of connecting a charger, a data cable, headphones, etc.

[0005] Currently, the FPC used to connect the USB interface and the motherboard in electronic devices is usually set on the side of the battery facing the screen. This means that if you want to remove the USB interface, you need to remove the battery first, which makes the disassembly process more cumbersome and requires reinstalling the battery, increasing the difficulty of assembly.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a flexible circuit board and an electronic device, which can simplify the disassembly process of the USB interface and reduce the assembly difficulty and maintenance cost.

[0008] In a first aspect, an embodiment of the present application provides a flexible circuit board, comprising a first flexible board and a second flexible board; wherein the first end of the first flexible board is used to connect to a universal serial bus interface of an electronic device where the flexible circuit board is located, wherein the first flexible board is arranged on a side of a battery in the electronic device facing away from a screen of the electronic device, and the second end of the first flexible board is detachably connected to the first end of the second flexible board; the second end of the second flexible board is connected to a mainboard of the electronic device, wherein the second flexible board is arranged on a side of the battery facing the screen.

[0009] It can be understood that the flexible circuit board provided in the embodiment of the present application includes two detachably connected flexible boards, one of which is arranged on the rear side of the battery and connected to the USB interface, and the other flexible board is arranged on the front side of the battery and connected to the mainboard. When the USB interface needs to be removed, the first flexible board can be seen by opening the cover on the rear side of the electronic device. Since the first flexible board and the second flexible board are detachably connected, the first flexible board can be easily disconnected from the second flexible board, the first flexible board can be removed, and then the USB interface can be subsequently processed. In this way, there is no need to remove the battery, which simplifies the disassembly steps of the USB interface, reduces the tediousness of disassembly, and eliminates the need to reinstall the battery, reducing the difficulty of assembly and maintenance costs.

[0010] In a possible implementation manner of the first aspect above, the second end of the first flexible board is connected to the first end of the second flexible board through a board-to-board connector.

[0011] The board-to-board connector can be used to connect different circuit boards together, so that an electrical connection between the first flexible board and the second flexible board can be achieved.

[0012] In a possible implementation of the first aspect above, the board-to-board connector includes a first connection seat and a second connection seat; the first connection seat is arranged at the second end of the first flexible board, and the second connection seat is arranged at the first end of the second flexible board.

[0013] In a possible implementation of the first aspect above, the first connecting socket is a female socket, and the second connecting socket is a male socket.

[0014] It is understood that in other possible implementations, the first connector can also be a male connector, and correspondingly, the second connector can also be a female connector. By snapping the first connector and the second connector together, an electrical connection between the first flexible board and the second flexible board can be achieved. When the USB interface needs to be disassembled, it is only necessary to release the snapping between the first flexible board connected to the USB interface and the second flexible board.

[0015] In a possible implementation of the first aspect above, the length direction of the board-to-board connector is set along the width direction of the electronic device, and the width direction of the board-to-board connector is set along the length direction of the electronic device; or, the length direction of the board-to-board connector is set along the length direction of the electronic device, and the width direction of the board-to-board connector is set along the width direction of the electronic device.

[0016] It is understood that electronic devices often implement various electronic functions, and the board-to-board connector configuration can be adjusted based on the actual internal device layout of the electronic device. For example, the board-to-board connector can be arranged along the length of the electronic device, i.e., horizontally, or along the width of the electronic device, i.e., vertically.

[0017] In a possible implementation manner of the first aspect, the shape of the first flexible board includes any one of the following: П-shape, semicircular shape, and arch shape.

[0018] It is understood that if the USB port at one end of the first flexible board and the board-to-board connector at the other end are arranged in the same direction, for example, arranged sequentially along the width of the electronic device, the shape of the first flexible board can be any of the aforementioned shapes: П-shaped, semicircular, or arched. In other possible implementations, if the USB port and the board-to-board connector are arranged in different directions, the shape of the first flexible board can be other shapes, such as an elongated strip.

[0019] In a possible implementation of the first aspect, the thickness of the first flexible board is 0.05 mm to 0.3 mm.

[0020] The thickness of the first flexible board can be dynamically adjusted according to the size of the internal space of the actual electronic device.

[0021] In a second aspect, an embodiment of the present application provides an electronic device, comprising the flexible circuit board, interface, mainboard, battery and screen of the first aspect mentioned above.

[0022] In a possible implementation of the first aspect above, the electronic device further includes a printed circuit board; the main board is disposed on one side of the battery along the length direction of the electronic device, and the printed circuit board is disposed on the other side of the battery along the length direction.

[0023] It is understood that the printed circuit board can be used to support some functional components of the electronic device, including but not limited to USB interfaces and board-to-board connectors. The printed circuit board can be electrically connected to the mainboard via the first flexible board and the second flexible board to transmit electrical signals.

[0024] In a possible implementation of the first aspect above, the electronic device further includes a board-to-board connector; the board-to-board connector and the interface are sequentially arranged on the printed circuit board along a width direction of the electronic device.

[0025] As mentioned above, the arrangement of the board-to-board connector can be adjusted according to the internal device layout of the actual electronic device, and will not be further described here.

[0026] In a possible implementation of the first aspect above, the electronic device also includes a battery cover; the battery cover and the first flexible plate are arranged on the same side of the battery, and the first flexible plate is arranged between the battery cover and the battery; the battery cover includes a first thinning area corresponding to the first flexible plate and a second thinning area for forming identification information of the electronic device, wherein the first thinning area and the second thinning area do not overlap.

[0027] As can be understood, the battery cover is positioned on the rear side of the battery. The first flexible board is positioned between the battery and the battery cover. Generally, the battery cover is provided with a second thinned area for forming identification information for the electronic device, including but not limited to text or patterns. Since the first flexible board has a certain thickness, in order to reserve a certain space for the first flexible board, the battery cover is provided with a first thinned area for accommodating the first flexible board. The first thinned area and the second thinned area do not overlap to avoid excessive thinning that may reduce the rigidity of the battery cover and cause breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the appearance of an electronic device provided in an embodiment of the present application;

[0029] FIG2 is a schematic diagram of a partial structure of an internal structure of an electronic device provided in an embodiment of the present application;

[0030] FIG3 is a rear view of a partial internal structure of an electronic device provided in an embodiment of the present application;

[0031] FIG4 is a side view of a partial internal structure of an electronic device provided in an embodiment of the present application;

[0032] FIG5 is a schematic diagram of a partial structure of another electronic device provided in an embodiment of the present application;

[0033] FIG6 is a schematic diagram of a first flexible board provided in an embodiment of the present application;

[0034] FIG7 is a schematic diagram of a second flexible board provided in an embodiment of the present application;

[0035] FIG8 is a schematic diagram of the internal structure of a simple electronic device provided in an embodiment of the present application;

[0036] FIG9 is a schematic diagram of a partial structure of an electronic device provided in an embodiment of the present application;

[0037] FIG10 is a schematic diagram of a battery cover provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] The illustrative embodiments of the present application include, but are not limited to, flexible circuit boards and electronic devices. The embodiments of the present application are described below in conjunction with the accompanying drawings.

[0039] As previously mentioned, in electronic devices, the USB interface needs to be electrically connected to the motherboard via a flexible circuit board. Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the appearance of an electronic device 10 provided in an embodiment of the present application, and Figure 2 is a schematic diagram of the internal structure of an electronic device 10 in some technical solutions.

[0040] In the embodiments of the present application, a mobile phone is used as an example of the electronic device 10. In other embodiments, the electronic device 10 may be a laptop computer, a tablet computer, a large-screen device, an in-vehicle device, a wearable device (e.g., a watch, smart glasses, a helmet), an augmented reality (AR) / virtual reality (VR) device, a personal digital assistant (PDA), etc., and the present application does not limit this.

[0041] In the figures herein, the X direction is the width direction of the electronic device, the Y direction is the length direction of the electronic device, and the Z direction is the thickness direction of the electronic device. The X direction, the Y direction, and the Z direction may be perpendicular to each other.

[0042] It should be noted that the directional terms such as "top", "bottom", "left", "right", "front" and "back" used in the embodiment of the present application to describe the electronic device 10 are mainly explained based on the display orientation of the electronic device 10 in Figure 1, with the direction facing the positive direction of the Y axis as "top" and "up", the direction facing the negative direction of the Y axis as "bottom" and "bottom", the direction facing the positive direction of the X axis as "left", the direction facing the negative direction of the X axis as "right", the direction facing the positive direction of the Z axis as "front", and the direction facing the negative direction of the Z axis as "back". It does not constitute a limitation on the orientation of the electronic device 10 in actual application scenarios.

[0043] As shown in Figures 1 and 2, electronic device 10 includes a screen 10a, a USB port 101, a mainboard 102, a flexible circuit board 103, a battery 104, a midframe 106, and a battery cover 107. Screen 10a is used to display text, images, and videos. Screen 10a can include any of the following: a liquid crystal display (LCD), an organic light-emitting diode (OLED), or an active-matrix organic light-emitting diode (AMOLED).

[0044] The USB interface 101 is an interface that complies with USB standards and may be a Mini USB interface, a Micro USB interface, a USB Type-C interface, etc. The USB interface 101 can be used to connect a charger to charge the battery 104, to transfer data between the electronic device 10 and peripheral devices, or to connect headphones to play audio through the headphones.

[0045] The flexible circuit board 103 is flexible, foldable, and twistable, and can be made from polyimide or polyester film. It connects the USB port 101 to the motherboard 102. Specifically, one end of the flexible circuit board 103 is soldered to the USB port 101, and the other end is connected to the board-to-board connector on the motherboard 102. This establishes an electrical connection between the USB port 101 and the motherboard 102 via the flexible circuit board 103.

[0046] A processor (not shown) is provided on the mainboard 102. After the USB interface 101 is electrically connected to the mainboard 102, the processor can be used to process the transmission data between the USB interface 101 and the peripheral device, and can also be used to control the charging process of the USB interface 101, and can also be used to control the audio output of the USB interface 101.

[0047] In some embodiments, devices such as a memory and a communication module may also be provided on the mainboard 102. The memory and the communication module are electrically connected to the processor respectively. The memory is used to store instructions and data. The communication module can realize wireless communications such as 3G / 4G / 5G of mobile phones. The communication module can realize wireless communications such as wireless local area networks (WLAN), Bluetooth (BT) and near field communication technology (NFC) of the electronic device 10.

[0048] It should be noted that the components on the mainboard 102 are not limited to those described above, and electronic components for realizing other performances of the electronic device 10 may also be provided, which are not listed here one by one.

[0049] The middle frame 106 is an important component that connects various parts of the electronic device 10. The middle frame 106 can be made of metal or plastic material, has a rectangular shape, and has a concave structure inside to facilitate the installation of various components.

[0050] It is understood that the USB port in the electronic device can be fixedly connected to the middle frame via a printed circuit board, or can be directly fixedly connected to the middle frame without a printed circuit board. This application only uses the solution of the USB port being fixedly connected to the middle frame via a printed circuit board as an example and is not intended to be limiting.

[0051] The battery cover 107 is installed on the rear side of the battery 104 to provide protection for the electronic device 10 and is usually made of glass, plastic, metal, ceramic or other materials.

[0052] It should be noted that the placement of the USB port 101, motherboard 102, flexible circuit board 103, battery 104, midframe 106, and battery cover 107 in Figure 2 is merely illustrative and does not limit the placement of these components in actual scenarios. For example, motherboard 102 could be located at the top of electronic device 10 or to the left of battery 104 within electronic device 10.

[0053] In some embodiments, because the side of the battery 104 facing away from the screen 10a of the electronic device 10 (serving as the back side of the battery 104) needs to be used to house other functional components of the electronic device 10, such as a wireless charging coil and an NFC coil, there is insufficient wiring space on the back side of the battery 104 to accommodate the flexible circuit board 103. Therefore, the flexible circuit board 103 can only be placed on the side of the battery 104 facing the screen 10a (serving as the front side of the battery 104). To disassemble and repair the USB port 101, it is first necessary to open the battery cover on the back side of the electronic device 10, remove the battery 104, and then see the flexible circuit board 103. Then, the flexible circuit board 103 must be removed from the motherboard 102 before the USB port 101 can be repaired. As can be seen, the structure and arrangement of the flexible circuit board 103 make the disassembly of the USB port 101 cumbersome and require the reinstallation of the battery 104, which increases the difficulty of assembly.

[0054] Based on this, an embodiment of the present application provides a flexible circuit board comprising two detachably connected flexible boards, one of which is located on the rear side of the battery and connected to the USB port, while the other is located on the front side of the battery and connected to the motherboard. Thus, when the USB port needs to be removed, the flexible board connected to the USB port can be seen by simply opening the battery cover on the rear side of the electronic device. After removing the flexible board, the USB port can be subsequently processed.

[0055] Specifically, as shown in Figures 3 to 5, the present embodiment provides a flexible circuit board 203 for connecting the USB port 101 and the motherboard 102 in the electronic device 10. Figure 3 is a rear view of a portion of the internal structure of the electronic device 10 provided in the embodiment of the present application. Figure 4 is a side view of a portion of the internal structure of the electronic device 10 provided in the embodiment of the present application. Figure 5 is a schematic diagram of a portion of the internal structure of the electronic device 10 provided in the embodiment of the present application.

[0056] As shown in Figures 3 to 5, the flexible circuit board 203 includes a first flexible board 2031 and a second flexible board 2032. One end of the first flexible board 2031 is connected to the USB interface 101, and the other end of the first flexible board 2031 is detachably connected to one end of the second flexible board 2032 via a board-to-board connector (hereinafter referred to as B2B connector) 204, and the other end of the second flexible board 2032 is connected to the mainboard 102 (not shown). In addition, the first flexible board 2031 is arranged on the rear side of the battery 104, and the second flexible board 2032 is arranged on the front side of the battery 104. In this way, the USB interface 101 is transferred to the second flexible board 2032 through the first flexible board 2031 to achieve electrical connection with the mainboard 102. The first flexible board 2031 can be set smaller, so that the first flexible board 2031 only needs to occupy a smaller wiring space on the rear side of the battery 104. When the USB interface 101 needs to be removed, the cover on the rear side of the electronic device 10 is opened to reveal the first flexible board 2031. Since the first flexible board 2031 and the second flexible board 2032 are detachably connected via the B2B connector 204, the first flexible board 2031 can be easily disconnected from the second flexible board 2032, removed, and the USB interface 101 can then be subsequently processed. This eliminates the need to remove the battery 104, simplifying the disassembly process of the USB interface 101 and reducing the complexity of disassembly. Furthermore, there is no need to reinstall the battery 104, reducing assembly difficulty and maintenance costs.

[0057] In some embodiments, as shown in Figures 3 and 5, electronic device 10 further includes a printed circuit board 105. Printed circuit board 105 can be disposed at the bottom of electronic device 10 and is used to support other components on the bottom, such as USB port 101. A midframe 106 is connected to printed circuit board 105 and is used to support the entire printed circuit board 105. It should be noted that the printed circuit board used to support the USB port in different electronic devices can be located anywhere within the electronic device, and this application does not limit this.

[0058] As shown in Figure 3, the printed circuit board 105 is used to support the USB interface 101 and the B2B connector 204. The B2B connector 204 and the USB interface 101 can be spaced apart on the printed circuit board 105 along the X direction. It should be noted that the printed circuit board 105 is a circuit board originally installed in the electronic device 10 to support other bottom components such as the USB interface 101. In actual applications, the printed circuit board used to support the USB interface in different electronic devices can be located anywhere in the electronic device.

[0059] In addition, considering the various internal structural designs of electronic devices, this application does not limit the relative position between the B2B connector 204 and the USB interface 101. The setting method of Figure 3 is only an example for the convenience of the following description.

[0060] For the electronic device 10 shown in Figure 1, in order to reduce the thickness of the electronic device 10 in the Z direction, the printed circuit board 105 and the main board 102 are respectively arranged on both sides of the battery 104 along the Y direction. For example, the printed circuit board 105 is arranged on the side of the battery 104 close to the bottom of the electronic device 10, and the main board 102 is arranged on the side of the battery 104 close to the top of the electronic device 10.

[0061] As previously described, the first flexible board 2031 and the second flexible board 2032 are connected via the B2B connector 204. The B2B connector 204 may include a first connection base 2041 and a second connection base 2042. The first connection base 2041 and the second connection base 2042 may be disposed at the ends of the first flexible board 2031 and the second flexible board 2032, respectively. Thus, the first flexible board 2031 and the second flexible board 2032 may be connected by snapping the first connection base 2041 and the second connection base 2042 together.

[0062] In some embodiments, as shown in Figures 6 and 7, Figure 6 is a schematic diagram of a first flexible board 2031 provided in an embodiment of the present application, and Figure 7 is a schematic diagram of a second flexible board 2032 provided in an embodiment of the present application. A first connection socket 2041 is provided at one end of the first flexible board 2031, and a second connection socket 2042 is provided at one end of the second flexible board 2032. Here, for example, the first connection socket 2041 is a female socket, and the second connection socket 2042 is a male socket. In other examples, the first connection socket 2041 may also be a male socket, and correspondingly, the second connection socket 2042 may be a female socket.

[0063] Typically, the B2B connector 204 has a rectangular shape. Thus, in some embodiments, as shown in FIG3 , the length of the B2B connector 204 is arranged along the X-direction, and the width of the B2B connector 204 is arranged along the Y-direction, i.e., the B2B connector 204 is arranged horizontally. In other embodiments of the present application, the length of the B2B connector 204 may also be arranged along the Y-direction, and the width along the X-direction, i.e., the B2B connector 204 is arranged vertically. The specific arrangement of the B2B connector 204 can be adjusted based on the internal space of the actual electronic device, and this application does not limit this.

[0064] In other embodiments of the present application, in addition to the above-mentioned B2B connector 204 , other connectors may be used to achieve a detachable connection between the first flexible board 2031 and the second flexible board 2032 .

[0065] As previously described, the USB interface 101 and the B2B connector 204 can be spaced apart along the X-direction on the printed circuit board 105. Thus, in some embodiments, the shape of the first flexible board 2031 includes any of the following: a P-shape, a semicircular shape, or an arched shape. As shown in Figures 3, 5, and 6, the shape of the first flexible board 2031 is P-shaped.

[0066] In addition, as previously described, the mainboard 102 is disposed on the side of the battery 104 close to the top of the electronic device 10, and the B2B connector 204 is disposed on the side of the battery 104 close to the bottom of the electronic device 10. Therefore, in some embodiments, the second flexible board 2032 may be in the shape of an elongated strip.

[0067] Considering the diverse internal structural designs of electronic devices, in practical applications, the shapes of the first flexible board 2031 and the second flexible board 2032 can be adjusted to accommodate the internal structures of different electronic devices. Another possible flexible circuit board 203' will be described below with reference to FIG8 . The shapes of the first flexible board 2031' and the second flexible board 2032' in the flexible circuit board 203' can be adjusted based on the internal structure of the electronic device 10' in which it is located.

[0068] FIG8 is a schematic diagram of the internal structure of a simple electronic device 10 ′ provided in an embodiment of the present application.

[0069] As shown in FIG8 , the USB interface 101 ′ and the motherboard 102 ′ in the electronic device 10 ′ are respectively arranged on both sides of the battery 104 ′. The motherboard 102 ′ is arranged on the top of the battery 104 ′ near the electronic device 10 ′, and the USB interface 101 ′ is arranged on the bottom of the battery 104 ′ near the electronic device 10 ′.

[0070] The difference from electronic device 10 is that in electronic device 10', a printed circuit board 105' for carrying components is provided on the right side of battery 104' (left side from the perspective of Figure 8). A B2B connector 204' can be provided on printed circuit board 105' to achieve a detachable connection between the first flexible board 2031' and the second flexible board 2032'. The first flexible board 2031' is provided on the rear side of battery 104', with reference to the first flexible board 2031; the second flexible board 2032' is provided on the front side of battery 104', with reference to the second flexible board 2032. The portion of the second flexible board 2032' obscured by the battery 104' is indicated by a dotted line in Figure 8.

[0071] As can be seen from FIG. 8 , the B2B connector 204 ′ is disposed on the right side of the battery 104 ′, so that the shapes of the first flexible board 2031 ′ and the second flexible board 2032 ′ can be adjusted to a long strip with a bend or an arc.

[0072] Referring to Figure 9 , FIG9 is a schematic diagram of a partial structure of an electronic device 10 provided in an embodiment of the present application. It should be noted that FIG9 only shows a portion of the battery cover 107 in the Y direction. It is understood that the battery cover 107 is disposed behind the battery 104. The first flexible board 2031 is disposed between the battery 104 and the battery cover 107.

[0073] Referring to Figure 10, Figure 10 is a schematic diagram of a battery cover 107 provided in an embodiment of the present application. For ease of viewing, the first flexible plate 2031 is shown in dashed lines. As shown in Figure 10, the battery cover 107 includes a first thinned area 107a corresponding to the first flexible plate 2031. The first thinned area 107a is used to accommodate the first flexible plate 2031 after thinning. The thinned thickness of the first thinned area 107a can be determined based on the actual thickness of the first flexible plate 2031. For example, the thickness of the first flexible plate 2031 is 0.05mm to 0.3mm, for example, 0.05mm, 0.08mm, 0.09mm, 0.1mm, 0.2mm, 0.3mm, etc. In this way, by thinning the area on the battery cover 107 corresponding to the first flexible plate 2031, the increase in the thickness of the electronic device 10 in the Z direction due to the first flexible plate 2031 can be avoided.

[0074] In some embodiments, the battery cover 107 further includes a second thinning area 107b, which is used for etching after thinning to form identification information of the electronic device 10. The identification information includes but is not limited to text or patterns. The first thinning area 107a and the second thinning area 107b do not overlap to avoid a decrease in the rigidity of the battery cover 107 due to excessive thinning, thereby avoiding breakage. Specifically, the distance y1 from the upper edge of the first thinning area 107a to the bottom of the electronic device 10 is less than the distance y2 from the lower edge of the second thinning area 107b to the bottom of the electronic device 10. That is, the size of the first flexible plate 2031 in the Y direction needs to be determined according to the position of the second thinning area 107b on the battery cover 107.

[0075] It should be noted that in the examples and description of the present application, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a" does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0076] While the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A flexible circuit board, characterized in that: It comprises a first flexible board (2031) and a second flexible board (2032); wherein The first end of the first flexible board (2031) is used to connect to a universal serial bus interface (101) of an electronic device (10) in which the flexible circuit board (203) is located, wherein the first flexible board (2031) is arranged on a side of the battery (104) of the electronic device (10) facing away from a screen (10a) of the electronic device (10), and The second end of the first flexible board (2031) is detachably connected to the first end of the second flexible board (2032); The second end of the second flexible board (2032) is connected to the main board (102) of the electronic device (10), wherein the second flexible board (2032) is arranged on a side of the battery (104) facing the screen (10a).

2. The flexible circuit board according to claim 1, characterized in that: The second end of the first flexible board (2031) is connected to the first end of the second flexible board (2032) via a board-to-board connector (204).

3. The flexible circuit board according to claim 2, characterized in that: The board-to-board connector (204) comprises a first connection seat (2041) and a second connection seat (2042); The first connection seat (2041) is arranged at the second end of the first flexible board (2031), and the second connection seat (2042) is arranged at the first end of the second flexible board (2032).

4. The flexible circuit board according to claim 3, characterized in that: The first connecting seat (2041) is a female seat, and the second connecting seat (2042) is a male seat.

5. The flexible circuit board according to claim 2, characterized in that: The length direction of the board-to-board connector (204) is arranged along the width direction of the electronic device (10), and the width direction of the board-to-board connector (204) is arranged along the length direction of the electronic device (10); Alternatively, the length direction of the board-to-board connector (204) is arranged along the length direction of the electronic device (10), and the width direction of the board-to-board connector (204) is arranged along the width direction of the electronic device (10).

6. The flexible circuit board according to any one of claims 1 to 5, characterized in that: The shape of the first flexible plate (2031) includes any one of the following: I-shaped, semicircular, arched.

7. The flexible circuit board according to claim 6, characterized in that: The thickness of the first flexible plate (2031) is 0.05 mm to 0.3 mm.

8. An electronic device, characterized in that: It comprises the flexible circuit board (203) described in any one of claims 1 to 7, the interface (101), the main board (102), the battery (104) and the screen (10a).

9. The electronic device according to claim 8, characterized in that: The electronic device further comprises a printed circuit board (105); The main board (102) is arranged on one side of the battery (104) along the length direction of the electronic device, and the printed circuit board (105) is arranged on the other side of the battery (104) along the length direction.

10. The electronic device according to claim 9, characterized in that: The electronic device also includes a board-to-board connector (204); The board-to-board connector (204) and the interface (101) are arranged in sequence on the printed circuit board (105) along the width direction of the electronic device.

11. The electronic device according to claim 8, characterized in that: The electronic device further comprises a battery cover plate (107); the battery cover plate (107) and the first flexible plate (2031) are arranged on the same side of the battery (104), and the first flexible plate (2031) is arranged between the battery cover plate (107) and the battery (104); The battery cover plate (107) comprises a first thinned area (107a) corresponding to the first flexible plate (2031) and a second thinned area (107b) for forming identification information of the electronic device, wherein The first thinned area (107a) and the second thinned area (107b) do not overlap.

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