CN218888754U

CN218888754U - Flexible circuit board and electronic equipment

Info

Publication number: CN218888754U
Application number: CN202222596481.XU
Authority: CN
Inventors: 蔡步森; 朱豪杰; 阮斌; 黄翔
Original assignee: Zhejiang Uniview Technologies Co Ltd
Current assignee: Zhejiang Uniview Technologies Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-04-18
Anticipated expiration: 2032-09-29

Abstract

The utility model relates to the field of electronic equipment, and provides a flexible circuit board and electronic equipment, wherein the flexible circuit board comprises a flexible substrate, and the flexible substrate is provided with a functional area and two mixing areas at two sides of the functional area; a first functional wire is constructed in the functional zones, and a first functional wire and a second functional wire are constructed in each mixing zone; the first functional line and the second functional line are arranged in axial symmetry or central symmetry at two ends of the flexible substrate corresponding to the interfaces. The utility model provides a flexible circuit board, through separating into functional area and two mixed districts with flexible substrate, and set up first function line in the functional area, set up first function line and second function line in mixed district, be axial symmetry or central symmetry setting at flexible substrate both ends with the interface that first function line and second function line correspond, make inserting the in-process of establishing flexible circuit board, need not to differentiate and correspond the interface, can assemble flexible circuit board, the fool-proofing effect has, improve assembly quality and efficiency.

Description

Flexible circuit board and electronic equipment

Technical Field

The utility model relates to an electronic equipment field especially relates to a flexible circuit board and electronic equipment.

Background

A Flexible Printed Circuit (FPC) is a highly reliable and excellent Flexible Printed Circuit board made of a polyimide or polyester film as a base material. Compared with a hard board, the flexible board has the characteristics of high wiring density, light weight, thin thickness and good bending property. The flexible circuit board has a wide application field, and is applied to the fields of mobile phones, tablet computers, cameras, displays, printers, automobiles, aerospace, medical treatment and the like.

The flexible circuit board is used in a large number of network video camera products for connecting a chip board and an encoding board inside the network video camera. The flexible circuit board is generally used for the single board connection inside the device, the pin definition is flexible, and the pin definition comprises a power supply and a ground. Although pin definition is flexible, there is a drawback: the connectors on the two sides of the flexible circuit board are the same, no structure is adopted for fool-proofing, two ends can be connected to the same single board, the pin definition of the flexible circuit board connector is not symmetrical, and if the flexible circuit board is not inserted into the corresponding single board in the assembling process, the circuit can not work normally, and even the device is burnt.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flexible circuit board and electronic equipment solves and inserts the problem that the mistake can lead to the unable normal work of circuit, burns out equipment even in the flexible circuit board assembling process.

The utility model provides a flexible circuit board, include:

the flexible substrate is provided with a functional area and two mixing areas arranged on two sides of the functional area;

wherein a first functional wire is configured in the functional zones, and the first and second functional wires are configured in each of the mixing zones; the interfaces corresponding to the two ends of the first functional line and the second functional line are arranged at the two ends of the flexible substrate in an axial symmetry or central symmetry manner.

According to the utility model provides a pair of flexible circuit board, the functional area includes: a signal area; the first functional wire includes: a signal line; the second functional wire includes: a power line; the signal line and the power line corresponding interfaces are arranged at two ends of the flexible substrate in an axial symmetry or central symmetry mode.

According to the utility model provides a pair of flexible circuit board, two in the mixed district the signal line symmetry sets up the signal district the both sides of signal line, two in the mixed district the power line symmetry sets up the signal district the both sides of signal line.

According to the utility model provides a pair of flexible circuit board, the width of power cord is greater than the width of signal line.

According to the utility model provides a pair of flexible circuit board, the functional area includes: a power supply area; the first functional wire includes: a power line; the second functional wire includes: a signal line; the signal line and the power line corresponding interfaces are arranged at two ends of the flexible substrate in an axial symmetry or central symmetry mode.

According to the utility model provides a pair of flexible circuit board, two in the mixed district the power cord symmetry sets up the power cord the both sides of power cord, two in the mixed district the signal line symmetry sets up the power cord the both sides of power cord.

According to the utility model provides a pair of flexible circuit board, flexible circuit board still includes:

two connectors, two the connector sets up respectively flexible substrate's both sides, one of them be constructed on the connector with first function line with the first pin group that the first end of second function line is connected, another be constructed on the connector first function line with the second pin group that second function line second end is connected, first pin group with second pin group is in flexible substrate both ends are axisymmetric or central symmetry setting.

According to the utility model provides a pair of flexible circuit board, first pin group includes: the first pin, the second pin and the third pin are arranged from top to bottom in sequence; the second pin group includes: the third pin, the second pin and the first pin are arranged from top to bottom in sequence;

two ends of the first functional wire of one of the mixing regions are respectively connected with the first pin of the first pin group and the third pin of the second pin group, two ends of the first functional wire of the functional region are respectively connected with the second pin of the first pin group and the second pin of the second pin group, and two ends of the second functional wire of the other mixing region are respectively connected with the third pin of the first pin group and the first pin of the second pin group.

According to the utility model provides a pair of flexible circuit board, first pin group includes: the first pin, the second pin and the third pin are arranged from top to bottom in sequence; the second pin group includes: the first pin, the second pin and the third pin are arranged from top to bottom in sequence;

two ends of the first functional wire of one of the mixing regions are respectively connected with the first pins in the first pin group and the second pin group, two ends of the first functional wire of the functional region are respectively connected with the second pins in the first pin group and the second pin group, and two ends of the second functional wire of the other mixing region are respectively connected with the third pins in the first pin group and the second pin group.

The utility model provides an electronic equipment, this electronic equipment include above-mentioned flexible circuit board.

The utility model provides a flexible circuit board and electronic equipment, through separating into functional area and two mixed districts with flexible substrate, and set up first function line in the functional area, set up first function line and second function line in mixed district, be axial symmetry or central symmetry setting at flexible substrate both ends with the interface that first function line and second function line both ends correspond, make inserting the in-process of establishing flexible circuit board, need not to differentiate and correspond the interface, can assemble flexible circuit board, the fool-proofing effect has, assembly quality and efficiency are improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is one of schematic diagrams of a flexible circuit board provided by the present invention;

fig. 2 is a second schematic diagram of a flexible circuit board provided by the present invention;

fig. 3 is a third schematic view of a flexible circuit board provided by the present invention;

fig. 4 is a fourth schematic diagram of a flexible circuit board provided by the present invention;

fig. 5 is a waveform diagram of the flexible circuit board simulation differential impedance TDR provided by the present invention;

fig. 6 is a waveform diagram of the differential impedance simulated by the flexible circuit board provided by the present invention;

fig. 7 is a fifth schematic diagram of a flexible circuit board provided by the present invention;

fig. 8 is a sixth schematic diagram of a flexible circuit board provided by the present invention;

reference numerals:

10. a flexible substrate; 100. a functional region; 101. a signal area; 102. a power supply area; 1000. a first functional wire; 200. a mixing zone; 2000. a second functional wire; 300. a first connector; 400. a second connector; 501. a first pin; 502. a second pin; 503. and a third pin.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Silk-screen marking is often used on existing flexible circuit boards: writing special character silk screen near the end of the connecting head, for example, writing 'TO SENSOR BOARD' near the connecting head and writing 'TO MAIN BOARD' near the connecting head when the connecting head is connected TO the chip BOARD. In the method, during assembly, workers need to distinguish silk screen printing at the interface and then carry out connection assembly. If a worker neglects the identification process, assembly errors can be easily caused, and quality accidents are caused.

In order to solve the above problem, the present embodiment proposes a flexible circuit board, and the following describes the flexible circuit board provided by the present invention with reference to fig. 1 and fig. 2, and the flexible circuit board includes: a flexible substrate 10. The flexible substrate 10 is provided with a functional region 100 and two mixing regions 200 disposed at both sides of the functional region 100.

The flexible substrate 10 is a body of a flexible circuit board, the flexible substrate 10 is provided with a circuit layer, and the circuit layer is divided into a functional area 100 and two mixing areas 200 arranged on two sides of the functional area 100. The functional region 100 is configured with a first functional wire 1000 therein, and the first functional wire 1000 and the second functional wire 2000 are configured in each of the mixing regions 200 on both sides of the functional region. For example, the first functional line 1000 in the functional region 100 may serve as a signal line or a power line, one of the first functional line 1000 and the second functional line 2000 may serve as a signal line, and the other of the first functional line 1000 and the second functional line 2000 may serve as a power line. The interfaces corresponding to the two ends of the first functional wire 1000 and the second functional wire 2000 are disposed at the two ends of the flexible substrate 10 in an axisymmetric or centrosymmetric manner. That is, the interfaces formed at both ends of the first functional wire 1000 and the second functional wire 2000 are the same, and the interfaces corresponding to both ends can be used commonly.

In the process of assembling the flexible circuit board, when any one end interface of the first functional wire 1000 and the second functional wire 2000 structure can be directly connected with the chip board, the other end interface of the first functional wire 1000 and the second functional wire 2000 structure can be connected with the code board. When the interface at any end of the first functional wire 1000 or the second functional wire 2000 is connected to the code board, the interface at the other end can be connected to the chip board. From this, need not to distinguish and correspond the interface, can assemble flexible circuit board, have the fool-proof effect, improve assembly quality and efficiency.

It should be noted that although the first functional wire 1000 and the second functional wire 2000 are disposed in the mixing zone 200, the first functional wire 1000 and the second functional wire 2000 in the mixing zone 200 can be selectively used during the actual use process. That is, when it is required to use the first functional wire 1000 and the second functional wire 2000 in the mixing zone 200, both can be operated at the same time. When only the first functional wire 1000 or the second functional wire 2000 is needed, only one of the wires can be used for operation. When the first functional wire 1000 and the second functional wire 2000 are not required, either one of the wires may not be used. And due to different interface usage, the two mixing zones 200 can also be used separately, and the first functional wires 1000 and the second functional wires 2000 in different mixing zones 200 are arranged differently.

The utility model provides a flexible circuit board, through separating into functional area 100 and two mixed districts 200 with flexible base plate, and set up first functional line 1000 in functional area 100, set up first functional line 1000 and second functional line 2000 in mixed district 200, with first functional line 1000, the interface that the 2000 both ends of second functional line correspond is axial symmetry or central symmetry setting at flexible base plate 10 both ends, make inserting the in-process of establishing flexible circuit board, need not to differentiate corresponding interface, can assemble flexible circuit board, the fool-proof effect has, improve assembly quality and efficiency.

In one embodiment provided by the present application, as shown in fig. 2 and 3, the functional area 100 includes: a signal region 101. That is, the functional area 100 runs signal lines, which mainly refer to lines used for transmitting sensing information and control information in the electrical control circuit. Accordingly, the first functional wire 1000 includes: and a signal line. One or more signal lines may be provided in the signal region 101. The mixing region 200 is a signal and power mixing region, and the mixing region 200 is used for both signal lines and power lines. Accordingly, the first functional wire 1000 includes: a signal line; the second functional wire 2000 includes: a power line. One or more signal lines and power lines may be provided in the mixing region 200.

In this embodiment, the signal line is a line for transmitting sensing information and control information. The power supply line is a line that transmits current. The corresponding interfaces of the signal line and the power line are arranged at two ends of the flexible substrate 10 in axial symmetry or central symmetry. That is, the interfaces formed at the two ends of the signal line and the power line are arranged in the same way, and the corresponding interfaces at the two ends can be used in common. Through the partition design, the mixed region 200 can be used for routing signal lines and power lines, so that the application range of the FPC cable is wider.

In the process of assembling the flexible circuit board, when any one end interface of the signal wire and the power wire structure can be directly connected with the chip board, the other end interface of the signal wire and the power wire structure can be connected with the coding board. When any one end interface of the signal wire and the power wire structure is connected with the coding board, the other end interface of the signal wire and the power wire structure can be connected with the chip board. From this, need not to distinguish and correspond the interface, can assemble flexible circuit board, have the fool-proofing effect, improve assembly quality and efficiency.

It should be noted that although the signal lines and the power lines are disposed in the mixing area 200, in the actual process, the signal lines and the power lines in the mixing area 200 can be selectively used. That is, when it is necessary to use the signal line and the power supply line in the mixing region 200, both can be operated at the same time. When only a signal line or a power line is needed, only one of the lines can be used for operation. When the signal line and the power supply line are not required, either line may not be used. And because the interface uses difference, two mixed area 200 can also be used separately, and the signal line and the power cord in different mixed area 200 adopt different settings.

As shown in fig. 2 and 3, in order to ensure the consistency of the interfaces formed at both ends, the two mixing regions 200 are configured identically, the signal lines in the two mixing regions 200 are symmetrically disposed at both sides of the signal line of the signal region 101, and the power supply lines in the two mixing regions 200 are symmetrically disposed at both sides of the signal line of the signal region 101. Thus, the two mixing regions 200 are symmetrically disposed on the upper and lower sides of the signal region 101. Through the symmetrical design, the foolproof flexible circuit board can be met, and meanwhile, the requirements of through-flow and impedance control can be met when any interface connection is selected.

In order to meet the design requirements, the routing of the mixed area 200 is thickened, that is, the width of the power line is larger than that of the signal line, and meanwhile, the impedance of the signal line in the mixed area 200 is ensured to be controllable in a hollowing mode. When the wires in the mixed area 200 need to be thickened according to the through-current requirement of the power supply, the thickened wires can also be used as signal wires, and in order to solve the impedance problem after the wires are thickened, the projection plane of the signal wires can be hollowed, so that the impedance of the wires is effectively improved. Meanwhile, the number of pins at the interface of the power line can be increased, and the impedance of the signal area 101 can be adjusted by adjusting the line width and the line spacing, for example, by single line control of 50ohm, differential line control of 100ohm or 90ohm.

As shown in fig. 4, the upper side is a Time Domain Reflectometry (TDR) waveform of the differential impedance hollowed out of the signal reference plane, and the lower side is a TDR waveform of the differential impedance not hollowed out of the signal reference plane. From the simulation results, it can be seen that the planar undercut differential impedance is significantly improved, with an impedance close to 80 ohms. Respectively building simulation links, for example, the connected single boards are an encoding board and a chip board, the differential impedance of the encoding board and the chip board is 100 ohms, and the impedance of the flexible circuit board is respectively 30 ohms, 80 ohms and 100 ohms for active simulation comparison. Taking the MIPI signal as an example, the clock operating frequency is 714MHz, and the simulation result is as follows.

As shown in fig. 5, the impedances of the flexible printed circuit board are respectively 100ohm waveform, 80ohm waveform and 30ohm waveform, and it is obvious from fig. 5 that the impedance of 30ohm has a very large influence on the signal quality, the edge is obviously slowed down, and the level amplitude is reduced. The signal waveform edges corresponding to the impedances of 80ohm and 100ohm are steeper, the signal return channel problem is avoided, and the level amplitude also meets the requirement. When the device is connected with the 30ohm flexible circuit board through actual measurement, the corresponding signal wave form diagram has poor wave form quality, and the normal work of the system can be seriously influenced under severe environments such as high and low temperatures.

In the practical process, the impedance of the signal line can be designed, (1) if the projection area of the signal line has a complete reference plane, the line width/line spacing design value of the corresponding impedance is obtained through an impedance calculation tool according to the lamination information. (2) If the signal line projection area does not have a complete reference plane, for example, the thickened routing of the mixed area 200 is used as a signal line, the plane of the projection area is hollowed, the impedance calculation of the signal line needs to be performed by 3-dimensional modeling, then an electromagnetic field simulation tool is used for performing simulation calculation, finally corresponding impedance is obtained, and the impedance required by design is obtained by repeatedly iterating and adjusting the size of the hollowed area for many times. Similarly, the power line can obtain the design value of the line width of the power wiring line through the through-current calculation software according to the specific power through-current requirement. Under the condition of 1oz copper thickness, the 10mil routing can reach the through-current requirement of 1.09A, and therefore the width of the power line is designed.

In one embodiment provided herein, as shown in fig. 2 and 4, the functional area 100 includes: a power region 102; the first functional wire 1000 includes: a power line. One or more power supply lines in the power supply area 102 may be provided. The second functional wire 2000 includes: a signal line; the corresponding interfaces of the signal line and the power line are arranged at two ends of the flexible substrate 10 in axial symmetry or central symmetry. One or more signal lines and power lines in the mixing region 200 may be provided.

In the process of assembling the flexible circuit board, when any one end interface of the signal wire and the power wire structure can be directly connected with the chip board, the other end interface of the signal wire and the power wire structure can be connected with the coding board. When any end interface of the signal wire and the power wire structure is connected with the coding board, the other end interface of the signal wire and the power wire structure can be connected with the chip board. From this, need not to distinguish and correspond the interface, can assemble flexible circuit board, have the fool-proofing effect, improve assembly quality and efficiency.

As shown in fig. 2 and 4, in order to ensure the consistency of the interface formed at the two ends, the two mixing areas 200 are configured identically, the signal lines in the two mixing areas 200 are symmetrically arranged at the two sides of the power line of the power area 102, and the power lines in the two mixing areas 200 are symmetrically arranged at the two sides of the power line of the power area 102. Thus, the two mixing regions 200 are symmetrically disposed on the upper and lower sides of the power supply region 102. Through such symmetrical design, can reach when satisfying flexible circuit board and prevent staying, can also satisfy through-flow and impedance control requirement when selecting arbitrary interface connection.

Similarly, in this embodiment, in order to meet the design requirement, the routing of the mixed region 200 is thickened, that is, the width of the power line is greater than that of the signal line, and meanwhile, the impedance of the signal line in the mixed region 200 is ensured to be controllable by a hollowing manner. When the wires in the mixed area 200 need to be thickened according to the through-current requirement of the power supply, the thickened wires can also be used as signal wires, and in order to solve the impedance problem after the wires are thickened, the projection plane of the signal wires can be hollowed, so that the impedance of the wires is effectively improved. Meanwhile, the number of pins at the interface of the power line can be increased, and the impedance of the signal area 101 can be adjusted by adjusting the line width and the line spacing.

Based on the above embodiment, as shown in fig. 1 to 4, the flexible circuit board further includes: two connectors, two connectors set up respectively the both sides of flexible substrate. Wherein, a first pin group connected with the first ends of the first functional wire 1000 and the second functional wire 2000 is constructed on one connector, a second pin group connected with the second ends of the first functional wire 1000 and the second functional wire 2000 is constructed on the other connector, and the first pin group and the second pin group are arranged in axial symmetry or central symmetry at the two ends of the flexible substrate 10.

Specifically, the two connectors are the first connector 300 and the second connector 400. The first connector 300 is configured with a first lead group connected to first ends of the first functional wire 1000 and the second functional wire 2000, and the second connector 400 is configured with a second lead group connected to second ends of the first functional wire 1000 and the second functional wire 2000, wherein the first lead group and the second lead group are disposed at two ends of the flexible substrate 10 in an axisymmetric or centrosymmetric manner. Therefore, the first connector 300 and the second connector 400 have the same structure, and the first connector 300 and the second connector 400 can be used commonly.

In one embodiment, as shown in fig. 7, the first pin group includes: a first pin 501, a second pin 502 and a third pin 503 which are arranged from top to bottom in sequence. The second pin group includes: the third pin 503, the second pin 502 and the first pin 501 are arranged from top to bottom in sequence. The wire thicknesses of the corresponding wires of the first pin 501 in the first pin group and the third pin 503 in the second pin group are the same, the wire thicknesses of the corresponding wires of the second pin 502 in the first pin group and the second pin 502 in the second pin group are the same, and the wire thicknesses of the corresponding wires of the third pin 503 in the first pin group and the first pin 501 in the second pin group are the same.

Two ends of the first functional wire 1000 of one of the mixing regions 200 are respectively connected to the first lead 501 of the first lead group and the third lead 503 of the second lead group, two ends of the first functional wire 1000 of the functional region 100 are respectively connected to the second lead 502 of the first lead group and the second lead 502 of the second lead group, and two ends of the second functional wire 2000 of the other mixing region 200 are respectively connected to the third lead 503 of the first lead group and the first lead 501 of the second lead group.

Specifically, the first connector 300 is provided with a first pin 501, a second pin 502, and a third pin 503 which are sequentially arranged from top to bottom. The second connector 400 is provided with a third pin 503, a second pin 502 and a first pin 501 which are sequentially arranged from top to bottom. Both ends of the first functional wire 1000 of the upper mixing area 200 are respectively connected with the first pin 501 of the first connector 300 and the third pin 503 of the second connector 400, both ends of the first functional wire 1000 of the functional area 100 are respectively connected with the second pin 502 of the first connector 300 and the second pin 502 of the second connector 400, and both ends of the second functional wire 2000 of the lower mixing area 200 are respectively connected with the third pin 503 of the first connector 300 and the first pin 501 of the second connector 400.

In the process of assembling the flexible circuit board, the first pin 501, the second pin 502 and the third pin 503 of the first pin group or the second pin group can be directly connected with the chip board or the coding board, the flexible circuit board can be assembled without distinguishing the pins of the corresponding interfaces, the foolproof effect is achieved, and the assembling quality and efficiency are improved.

It should be noted that, in the actual design process, more pins may also be arranged in the first pin group and the second pin group to meet different needs of the user.

In one embodiment, as shown in fig. 8, the first pin group includes: a first pin 501, a second pin 502 and a third pin 503 which are arranged from top to bottom in sequence; the second pin group includes: the first pin 501, the second pin 502 and the third pin 503 are arranged from top to bottom in sequence. The wire thicknesses of the corresponding wires of the first pin 501 in the first pin group and the first pin 501 in the second pin group are the same, the wire thicknesses of the corresponding wires of the second pin 502 in the first pin group and the second pin 502 in the second pin group are the same, and the wire thicknesses of the corresponding wires of the third pin 503 in the first pin group and the third pin 503 in the second pin group are the same. Two ends of the first functional wire 1000 of one of the mixing areas 200 are respectively connected to the first pins 501 in the first pin group and the second pin group, two ends of the first functional wire 1000 of the functional area 100 are respectively connected to the second pins 502 in the first pin group and the second pin group, and two ends of the second functional wire 2000 of the other mixing area 200 are respectively connected to the third pins 503 in the first pin group and the second pin group.

Specifically, the first connector 300 is provided with a first pin 501, a second pin 502, and a third pin 503 which are sequentially arranged from top to bottom. The second connector 400 is provided with a first pin 501, a second pin 502 and a third pin 503 which are sequentially arranged from top to bottom. Two ends of the first functional wire 1000 of the upper mixing area 200 are respectively connected with the first pins 501 in the first pin group and the second pin group, two ends of the first functional wire 1000 of the functional area 100 are respectively connected with the second pins 502 in the first pin group and the second pin group, and two ends of the second functional wire 2000 of the lower mixing area 200 are respectively connected with the third pins 503 in the first pin group and the second pin group.

The embodiment of the application further provides an electronic device, and the electronic device can be a smart phone, a game machine, a tablet computer, an electronic book reader or a wearable device. Of course, the electronic device may also be other devices, and the embodiment of the present invention is not limited thereto. The electronic device includes the flexible circuit board, and the structure of the flexible circuit board can refer to the text description of fig. 1 to 8, which is not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A flexible circuit board, comprising:

wherein a first functional wire is configured in the functional zones, and the first and second functional wires are configured in each of the mixing zones; the interfaces corresponding to the two ends of the first functional line and the second functional line are arranged at the two ends of the flexible substrate in an axial symmetry or central symmetry mode.

2. The flexible circuit board of claim 1, wherein the functional region comprises: a signal area; the first functional wire includes: a signal line; the second functional wire includes: a power line; the signal line and the power line corresponding interfaces are arranged at two ends of the flexible substrate in an axial symmetry or central symmetry mode.

3. The flexible circuit board according to claim 2, wherein the signal lines in the two mixing regions are symmetrically disposed on both sides of the signal line in the signal region, and the power supply lines in the two mixing regions are symmetrically disposed on both sides of the signal line in the signal region.

4. The flexible circuit board of claim 2, wherein the power line has a width greater than a width of the signal line.

5. The flexible circuit board of claim 1, wherein the functional region comprises: a power supply area; the first functional wire includes: a power line; the second functional wire includes: a signal line; the signal line and the power line corresponding interfaces are arranged at two ends of the flexible substrate in an axial symmetry or central symmetry mode.

6. The flexible circuit board of claim 5, wherein the power lines in the two mixing regions are symmetrically disposed on both sides of the power line in the power region, and the signal lines in the two mixing regions are symmetrically disposed on both sides of the power line in the power region.

7. The flexible circuit board according to any one of claims 1-6, further comprising:

8. The flexible circuit board of claim 7, wherein the first pin group comprises: the first pin, the second pin and the third pin are arranged from top to bottom in sequence; the second pin group includes: the third pin, the second pin and the first pin are arranged from top to bottom in sequence;

two ends of the first functional wire of one of the mixing regions are respectively connected with the first pins of the first pin group and the third pins of the second pin group, two ends of the first functional wire of the functional region are respectively connected with the second pins of the first pin group and the second pins of the second pin group, and two ends of the second functional wire of the other mixing region are respectively connected with the third pins of the first pin group and the first pins of the second pin group.

9. The flexible circuit board of claim 7, wherein the first pin group comprises: the first pin, the second pin and the third pin are arranged from top to bottom in sequence; the second pin group includes: the first pin, the second pin and the third pin are arranged from top to bottom in sequence;

10. An electronic device, comprising: the flexible circuit board of any one of claims 1-9.