Anti-tear flexible circuit board and electronic equipment

Abstract

The utility model provides an anti-tear flexible circuit board and electronic equipment, and relates to the technical field of circuit boards. The flexible circuit board is divided into a circuit board main body area and at least one circuit board bending area positioned on one side of the circuit board main body area; the flexible circuit board comprises an electrical function circuit which is located in the circuit board main body area and extends to the circuit board bending area; the anti-tearing line is located at the connecting corner of the circuit board main body area and the circuit board bending area, the anti-tearing line is located between the electrical function circuit and the edge line of the flexible circuit board, and a gap is formed between the anti-tearing line and the electrical function circuit. The anti-tear line is arranged between the electrical function line and the edge line of the flexible circuit board, so that the anti-tear capability of the flexible circuit board is improved. And the tearing opening can be blocked by the anti-tearing line or can extend along the gap between the electrical function circuit and the anti-tearing line more easily, so that the purpose of protecting the electrical function circuit is achieved, and the reliability of the flexible circuit board is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board, more particularly to a flexible circuit board capable of preventing tearing and an electronic device. BACKGROUND

[0002] Flexible Printed Circuit (FPC) is a printed circuit board made of flexible insulating substrate, mainly polyimide or polyester film. It can be freely bent, wound and folded. It has the advantages of small size, light weight, heat dissipation and weldability, easy to assemble and low comprehensive cost. Compared with hard boards, it has certain market advantages and meets the needs of the development of electronic products towards high density, miniaturization and high reliability. FPC has been widely used in aerospace, military, mobile communication, laptop, computer peripherals, PDA (Personal Digital Assistant), digital camera and other fields or products.

[0003] Although the flexible circuit board has various advantages, its softness also causes the disadvantage of being easily torn. For example, when the flexible circuit board is connected and fixed, it is easy to cause damage to the circuit board. In addition, due to the advantages of light weight, thin thickness and free bending and folding, the flexible circuit board is prone to tearing during production or transportation. Especially in the bending part of the flexible circuit board, since the bending part protrudes from the main part of the flexible circuit board, when the bending part is bent, tearing is more likely to occur at the connection between the bending part and the main part, thereby causing the problem of extending the electrical functional circuit in the flexible circuit board, and finally leading to the scrapping of the flexible circuit board. Therefore, the design of the flexible circuit board capable of preventing tearing is one of the current research directions for researchers. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a flexible circuit board capable of preventing tearing and an electronic device, effectively solving the technical problems existing in the prior art, improving the anti-tearing ability of the flexible circuit board, thereby improving the reliability of the flexible circuit board, and avoiding the problem of waste of circuit board materials.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows:

[0006] A flexible circuit board capable of preventing tearing, the flexible circuit board is divided into a circuit board main area and at least one circuit board bending area located on one side of the circuit board main area.

[0007] The flexible circuit board comprises:

[0008] An electrical function circuit is located in the circuit board body area, and the electrical function circuit extends to the circuit board bending area;

[0009] A tear-proof line is located at the connecting corner of the circuit board body area and the circuit board bending area, the tear-proof line is located between the electrical function circuit and the edge line of the flexible circuit board, and a gap is formed between the tear-proof line and the electrical function circuit.

[0010] Optionally, at the connecting corner of the circuit board body area and the circuit board bending area, the tear-proof line extends along the corner edge line of the connecting corner.

[0011] Optionally, the distance between the electrical function circuit and the tear-proof line is not less than 0.25 mm.

[0012] Optionally, the width of the tear-proof line is not less than 0.3 mm.

[0013] Optionally, at the connecting corner of the circuit board body area and the circuit board bending area, at least part of the line segment of the tear-proof line extends as an arc line along the corner edge line of the connecting corner.

[0014] Optionally, at the connecting corner of the circuit board body area and the circuit board bending area, at least part of the line segment of the tear-proof line extends as a circular arc line or a U-shaped line along the corner edge line of the connecting corner.

[0015] Optionally, at the connecting corner of the circuit board body area and the circuit board bending area, the radius of the arc of the arc line of at least part of the line segment of the tear-proof line is not less than 2 mm.

[0016] Optionally, the flexible circuit board is a single-layer flexible circuit board, a double-layer flexible circuit board or a multi-layer flexible circuit board.

[0017] Optionally, the tear-proof line is located in at least one circuit layer of the flexible circuit board.

[0018] Based on the same inventive concept, the application also provides an electronic device comprising the above-mentioned tear-proof flexible circuit board.

[0019] Compared with the prior art, the technical scheme provided by the application has at least the following advantages:

[0020] The application provides a flexible circuit board and an electronic device, the flexible circuit board is divided into a circuit board main body area and at least one circuit board bending area on one side of the circuit board main body area; the flexible circuit board comprises: an electrical function circuit, the electrical function circuit is located in the circuit board main body area, and the electrical function circuit extends to the circuit board bending area; a tear-proof line, the tear-proof line is located at the connecting corner of the circuit board main body area and the circuit board bending area, the tear-proof line is located between the electrical function circuit and the edge line of the flexible circuit board, and a gap is formed between the tear-proof line and the electrical function circuit.

[0021] From the above, the technical scheme provided by the application is that the tear-proof line is arranged between the electrical function circuit and the edge line of the flexible circuit board at the connecting corner of the circuit board main body area and the circuit board bending area, which is equivalent to arranging a tear-proof buffer area in front of the electrical function circuit, thereby improving the tear-proof capability of the flexible circuit board. When there is a tearing situation at the connecting corner of the circuit board main body area and the circuit board bending area, the tearing opening is blocked by the tear-proof line, or the tearing opening is more likely to extend along the gap between the electrical function circuit and the tear-proof line, thereby achieving the purpose of protecting the electrical function circuit, improving the reliability of the flexible circuit board, and avoiding the problem of circuit board material waste. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the application, and those skilled in the art can obtain other drawings according to the provided drawings without any creative effort.

[0023] Figure 1 A structure schematic diagram of a flexible circuit board provided by the embodiments of the application is shown in the figure.

[0024] Figure 2 A structure schematic diagram of a flexible circuit board provided by the embodiments of the application is shown in the figure. Figure 1 An enlarged schematic diagram of the corner area S1 in the figure.

[0025] Figure 3 A structure schematic diagram of another flexible circuit board provided by the embodiments of the application is shown in the figure.

[0026] Figure 4 A structure schematic diagram of another flexible circuit board provided by the embodiments of the application is shown in the figure.

[0027] Figure 5 A structure schematic diagram of another flexible circuit board provided by the embodiments of the application is shown in the figure.

[0028] Figure 6 A structure diagram of a single-layer flexible circuit board provided by an embodiment of the present application is shown in the following figure;

[0029] Figure 7 A structure diagram of a double-layer flexible circuit board provided by an embodiment of the present application is shown in the following figure;

[0030] Figure 8 A structure diagram of a multi-layer flexible circuit board provided by an embodiment of the present application is shown in the following figure. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] As described in the background, flexible circuit board, referred to as soft board, is a printed circuit board made of flexible insulating substrate, mainly polyimide or polyester film. It can be freely bent, wound and folded. It has the advantages of small volume, light weight, heat dissipation and weldability, easy to assemble and low comprehensive cost. Compared with hard board, it has certain market advantage and meets the needs of the development of electronic products in the direction of high density, miniaturization and high reliability. FPC has been widely used in the fields or products of aerospace, military, mobile communication, laptop, computer peripheral, PDA, digital camera, etc. Although the flexible circuit board has various advantages, its softness also causes the disadvantage of being easily torn. For example, when the flexible circuit board is connected and fixed, it is easy to cause damage to the circuit board. In addition, due to the advantages of light weight, thin thickness and free bending and folding, the flexible circuit board is easy to be torn during production or transportation. Especially in the bending part of the flexible circuit board, since the bending part protrudes from the main part of the flexible circuit board, when the bending part is bent, the connection between the bending part and the main part is more likely to be torn, thereby causing the problem of extending the electrical functional circuit in the flexible circuit board, and finally leading to the scrapping of the flexible circuit board. Therefore, the anti-tearing design of the flexible circuit board is one of the current research directions for researchers.

[0033] Based on this, the embodiments of the present application provide an anti-tearing flexible circuit board and electronic equipment, which effectively solve the technical problems existing in the prior art, improve the anti-tearing ability of the flexible circuit board, thereby improving the reliability of the flexible circuit board, and avoiding the problem of waste of circuit board materials.

[0034] To achieve the above object, the technical solutions provided by the embodiments of the present application are as follows, which are specifically combined with Figures 1 to 8The technical solutions provided by the embodiments of the present application are described in detail.

[0035] Reference Figure 1 As shown in FIG. 1, which is a structural schematic diagram of a flexible circuit board provided by an embodiment of the present application, the flexible circuit board 10 provided by the embodiment of the present application is divided into a circuit board main area A1 and at least one circuit board bending area A2 located on one side of the circuit board main area A1. The flexible circuit board 10 comprises: an electrical functional circuit 11, which is located in the circuit board main area A1 and extends to the circuit board bending area A2; and a tear-proof line 12, which is located at the connecting corner of the circuit board main area A1 and the circuit board bending area A2, is located between the electrical functional circuit 11 and the edge line of the flexible circuit board 10, and has a gap between the tear-proof line 12 and the electrical functional circuit 11.

[0036] From the above, the technical solutions provided by the embodiments of the present application are equivalent to setting a tear-proof buffer area in front of the electrical functional circuit 11 by setting the tear-proof line 12 between the electrical functional circuit 11 and the edge line of the flexible circuit board 10 at the connecting corner of the circuit board main area A1 and the circuit board bending area A2, thereby improving the tear-proof capability of the flexible circuit board 10. When there is a tearing situation at the connecting corner of the circuit board main area A1 and the circuit board bending area A2, the tearing opening will be blocked by the tear-proof line 12, or the tearing opening is more likely to extend along the gap between the electrical functional circuit 11 and the tear-proof line 12, thereby achieving the purpose of protecting the electrical functional circuit 11, improving the reliability of the flexible circuit board 10, and avoiding the problem of circuit board material waste.

[0037] In some embodiments, at the connecting corner of the circuit board main area A1 and the circuit board bending area A2, the tear-proof line 12 extends along the corner edge line of the connecting corner. Referring back to FIG. 1, Figure 1As shown, the connection edge corner of the circuit board main body area A1 and the circuit board bending area A2 is provided with the anti-tear line 12 extending along the corner edge line of the flexible circuit board 10 at the connection edge corner, thereby forming an anti-tear buffer area. It should be noted that the extension length of the anti-tear line 12 provided by the embodiment of the present application needs to be optimized according to the size of the connection edge corner of the circuit board main body area A1 and the circuit board bending area A2, that is, the extension length of the anti-tear line 12 needs to be optimized according to the length of the corner edge line of the flexible circuit board 10 at the connection edge corner, and the length of the anti-tear line 12 is at least greater than the length of the corner edge line at the connection edge corner of the circuit board main body area A1 and the circuit board bending area A2. Optionally, the extension length of the anti-tear line 12 provided by the embodiment of the present application is not less than the corner edge line at the connection edge corner of the circuit board main body area A1 and the circuit board bending area A2, thereby increasing the anti-tear buffer area, further improving the anti-tear capability of the flexible circuit board 10, and further improving the reliability of the flexible circuit board 10.

[0038] The anti-tear line 12 is arranged at the connection edge corner of the circuit board main body area A1 and the circuit board bending area A2, which is equivalent to arranging an anti-tear buffer area in front of the electrical functional line 11. The size of the anti-tear line 12 itself, the gap size between the anti-tear line 12 and the electrical functional line 11 and other factors will directly affect the anti-tear effect of the anti-tear buffer area. The technical solution provided by the embodiment of the present application can optimize the size of the anti-tear line 12 itself, the gap size between the anti-tear line 12 and the electrical functional line 11 and other factors to ensure that the anti-tear effect of the anti-tear buffer area is optimal. Reference Figure 2 As shown, Figure 1 The enlarged schematic view of the corner area S1 shows that the distance d1 between the electrical functional line 11 and the anti-tear line 12 provided by the embodiment of the present application can be set to be not less than 0.25 mm, thereby optimizing the gap width between the anti-tear line 12 and the electrical functional line 11, making it easier for the tear opening to extend along the gap between the anti-tear line 12 and the electrical functional line 11, thereby achieving the purpose of protecting the electrical functional line 11 from being torn, and improving the anti-tear effect and reliability of the flexible circuit board 10.

[0039] Continuing to refer to Figure 2 As shown, the width d2 of the anti-tear line 12 provided by the embodiment of the present application is not less than 0.3 mm. The width d2 of the anti-tear line 12 is the line width of the anti-tear line 12. Optimizing the line width of the anti-tear line 12 can improve the ability of the anti-tear line 12 to block the tear opening, thereby reducing the risk of the electrical functional line 11 being torn, further improving the anti-tear effect and reliability of the flexible circuit board 10.

[0040] At the connecting corner between the circuit board main area A1 and the circuit board bending area A2, the connecting corner between the circuit board main area A1 and the circuit board bending area A2 can be provided in the shape of an acute angle, a right angle or an obtuse angle; that is, at the connecting corner between the circuit board main area A1 and the circuit board bending area A2, the corner edge line of the flexible circuit board 10 at the connecting corner can be provided in the shape of a fold line (such as the fold line shape of the corner edge line at the connecting corner shown in Figure 1 The same, the anti-tearing line 12 is provided along the corner edge line of the connecting corner in the shape of an acute angle, a right angle or an obtuse angle, thereby forming an anti-tearing buffer area in front of the electrical functional line 11. In addition, the corner edge line of the connecting corner between the circuit board main area A1 and the circuit board bending area A2 provided by the embodiments of the present application can also be provided in the shape of an arc line, and at least part of the line segment of the anti-tearing line 12 is provided along the corner edge line of the connecting corner in the shape of an arc line, thereby reducing the tearing problem that is more likely to occur when the connecting corner is in the shape of a sharp angle. Referring to Figure 3 The same, the anti-tearing line 12 is provided along the corner edge line of the connecting corner in the shape of an acute angle, a right angle or an obtuse angle, thereby forming an anti-tearing buffer area in front of the electrical functional line 11. In addition, the corner edge line of the connecting corner between the circuit board main area A1 and the circuit board bending area A2 provided by the embodiments of the present application can also be provided in the shape of an arc line, and at least part of the line segment of the anti-tearing line 12 is provided along the corner edge line of the connecting corner in the shape of an arc line, thereby reducing the tearing problem that is more likely to occur when the connecting corner is in the shape of a sharp angle. Referring to

[0041] In some embodiments, when the corner edge line of the connecting corner is provided in the shape of an arc line, the arc line can be a circular arc line or a U-shaped line, etc., which is not specifically limited by the present application. Correspondingly, the anti-tearing line 12 provided by the embodiments of the present application can be provided along the corner edge line of the connecting corner, and the extension line shape of at least part of the line segment of the anti-tearing line 12 is the same as the shape of the corner edge line of the connecting corner, that is, at the connecting corner between the circuit board main area A1 and the circuit board bending area A2, the anti-tearing line 12 is provided along the corner edge line of the connecting corner in the shape of a circular arc line or a U-shaped line. Continue to refer to Figure 4As shown in the figure, at the connecting edge corners of the circuit board body area A1 and the circuit board bending area A2, the corner edge lines of the two connecting edge corners provided by the embodiment of the present application are both circular arcs, and at least part of the line segments of the two anti-tear lines 12 extend along the corner edge lines of the respective connecting edge corners as circular arcs.

[0042] Or refer to Figure 4 As shown in the figure, it is a structural schematic diagram of another anti-tear flexible circuit board provided by the embodiment of the present application, wherein, at the connecting edge corners of the circuit board body area A1 and the circuit board bending area A2, the corner edge lines of the two connecting edge corners provided by the embodiment of the present application are both U-shaped lines, and at least part of the line segments of the two anti-tear lines 12 extend along the corner edge lines of the respective connecting edge corners as U-shaped lines. Or refer to Figure 5 As shown in the figure, it is a structural schematic diagram of another anti-tear flexible circuit board provided by the embodiment of the present application, wherein, at the connecting edge corners of the circuit board body area A1 and the circuit board bending area A2, the corner edge line of one connecting edge corner provided by the embodiment of the present application is a circular arc, and the corner edge line of the other connecting edge corner is a U-shaped line; and correspondingly, at least part of the line segments of one of the two anti-tear lines 12 extend along the corner edge line of the circular arc as a circular arc, and at least part of the line segments of the other anti-tear line 12 extend along the corner edge line of the U-shaped line as a U-shaped line.

[0043] It should be noted that the embodiment of the present application provides Figures 3 to 5 The several flexible circuit boards 10 shown in the figure are only a few of all applicable flexible circuit boards 10. Among them, the shapes of the corner edge lines of the two connecting edge corners of the circuit board body area A1 and the circuit board bending area A2 provided by the embodiment of the present application can be the same or different; and the corner edge lines of the connecting edge corners provided by the embodiment of the present application can also be other types of arc lines, which are not limited by the present application. Optionally, at the connecting edge corners of the circuit board body area A1 and the circuit board bending area A2, the arc radius of at least part of the line segments of the anti-tear line 12 extending along the corner edge line of the connecting edge corner as an arc line is not less than 2mm, and by optimizing the arc radius of the arc line, the risk of tearing of the flexible circuit board 10 in the anti-tear buffer area can be reduced, and the reliability of the flexible circuit board 10 is further improved.

[0044] In some embodiments, the flexible circuit board 10 provided by the embodiment of the present application can be a single-layer flexible circuit board, a double-layer flexible circuit board or a multi-layer flexible circuit board. Refer to Figure 6As shown in the figure, the structure schematic diagram of the single-layer flexible circuit board provided by the embodiment of the present application, wherein the single-layer flexible circuit board provided by the embodiment of the present application comprises: a substrate layer 111, which is used to provide corresponding support for a circuit layer 113 in the single-layer flexible circuit board and has flexible, heat-resistant and other properties. A first adhesive layer 112 located on the substrate layer 111; the circuit layer 113 located on the side of the first adhesive layer 112 away from the substrate layer 111, which can be a copper foil layer and can form circuit patterns, connection lines and other electrical functional lines 11 by etching the circuit layer 113. A second adhesive layer 114 located on the side of the circuit layer 113 away from the substrate layer 111. A cover film 115 located on the side of the second adhesive layer 114 away from the substrate layer 111, which plays an insulating and protective role and prevents the lines in the circuit layer 113 from being interfered by external factors. In addition, the first adhesive layer 112 and the second adhesive layer 114 play a bonding and fixing role to fix and bond the adjacent two structure layers.

[0045] Reference Figure 7 As shown in the figure, the structure schematic diagram of the double-layer flexible circuit board provided by the embodiment of the present application, wherein the double-layer flexible circuit board provided by the embodiment of the present application comprises: a substrate layer 121, which is used to provide corresponding support for a first circuit layer 123 and a second circuit layer 127 in the double-layer flexible circuit board and has flexible, heat-resistant and other properties. A first adhesive layer 122 located on one side of the substrate layer 121. The first circuit layer 123 located on the side of the first adhesive layer 122 away from the substrate layer 121, which can be a copper foil layer and can form circuit patterns, connection lines and other electrical functional lines 11 by etching the first circuit layer 123. A second adhesive layer 124 located on the side of the first circuit layer 123 away from the substrate layer 121. A first cover film 125 located on the side of the second adhesive layer 124 away from the substrate layer 121, which plays an insulating and protective role and prevents the lines in the first circuit layer 123 from being interfered by external factors. A third adhesive layer 126 located on the side of the substrate layer 121 away from the first adhesive layer 122. The second circuit layer 127 located on the side of the third adhesive layer 126 away from the substrate layer 121, which can be a copper foil layer and can form circuit patterns, connection lines and other electrical functional lines 11 by etching the second circuit layer 127, and the lines in the first circuit layer 123 can be electrically connected with the lines in the second circuit layer 127 through a via. A fourth adhesive layer 128 located on the side of the second circuit layer 127 away from the substrate layer 121. A second cover film 129 located on the side of the fourth adhesive layer 128 away from the substrate layer 121, which plays an insulating and protective role and prevents the lines in the second circuit layer 127 from being interfered by external factors.

[0046] Reference Figure 8The diagram shown is a structural schematic of a multilayer flexible circuit board provided in an embodiment of this application. The multilayer flexible circuit board includes: at least three overlapping repeating units, each repeating unit including a substrate layer 131. The substrate layer 131 provides support for the circuit layer 133 and has properties such as flexibility and heat resistance. A first adhesive layer 132 is located on the substrate layer 131. A circuit layer 133 is located on the side of the first adhesive layer 132 facing away from the substrate layer 131. The circuit layer 133 can be a copper foil layer, and can be etched to form circuit patterns and connecting lines in the electrical functional circuit 11; furthermore, vias can be used to achieve electrical connections between different circuit layers 133. A second adhesive layer 134 is located on the side of the circuit layer 133 facing away from the substrate layer 131. A cover film 135 is located on the side of the second adhesive layer 134 facing away from the substrate layer 131. The cover film 135 provides insulation and protection, preventing interference from external factors to the circuits in the outermost circuit layer 133.

[0047] In some embodiments, the single-layer flexible circuit board, double-layer flexible circuit board, or multi-layer flexible circuit board provided in this application can be an adhesive-coated circuit board, i.e. Figures 6 to 8 In this embodiment, the flexible circuit board 10 includes an adhesive layer for fixing, and the circuit layer is fixed to the substrate layer and the cover film by the adhesive layer. Alternatively, the flexible circuit board 10 provided in this application embodiment can also be an adhesive-free circuit board, that is, the adhesive layer in the flexible circuit board 10 can be removed, and the circuit layer and the substrate layer and the circuit layer and the cover film can be fixed by other methods, thereby making the flexible circuit board 10 thinner, with better dimensional stability, higher heat resistance, higher bending resistance, and better chemical resistance, etc. This application does not make specific limitations in this regard.

[0048] In some embodiments, the tear-resistant line 12 provided in this application can be located in at least one circuit layer of the flexible circuit board 10. Furthermore, the tear-resistant line 12 provided in this application can be a copper wire. Specifically, as shown... Figure 6 As shown, when the flexible circuit board 10 provided in this embodiment is a single-layer flexible circuit board, the tear-resistant line 12 can be formed by etching the circuit layer 113. Or as... Figure 7 As shown, when the flexible circuit board 10 provided in this embodiment is a double-layer flexible circuit board, the tear-resistant line 12 can be formed by etching the first circuit layer 123 or the second circuit layer 127; or, when the flexible circuit board 10 is a double-layer flexible circuit board, the tear-resistant line 12 can include two sub-tear-resistant lines, one sub-tear-resistant line can be formed by etching the first circuit layer 123, and the other sub-tear-resistant line can be formed by etching the second circuit layer 127. Or as... Figure 8As shown, the flexible circuit board 10 provided by the embodiments of the present application is a multi-layer flexible circuit board, and the anti-tearing line 12 can be formed by etching any one circuit layer 133; or the flexible circuit board 10 is a multi-layer flexible circuit board, and the anti-tearing line 12 can include at least two sub-anti-tearing lines, and any one sub-anti-tearing line can be formed by etching any one circuit layer 133, which is not limited by the present application.

[0049] Based on the same inventive concept, the embodiments of the present application also provide an electronic device including the anti-tearing flexible circuit board 10 provided by any one of the above embodiments.

[0050] In summary, the embodiments of the present application provide an anti-tearing flexible circuit board and an electronic device. The flexible circuit board is divided into a circuit board main area and at least one circuit board bending area on one side of the circuit board main area. The flexible circuit board includes: an electrical functional circuit, which is located in the circuit board main area and extends to the circuit board bending area; and an anti-tearing line, which is located at the connecting corner of the circuit board main area and the circuit board bending area, is located between the electrical functional circuit and the edge line of the flexible circuit board, and has a gap between the anti-tearing line and the electrical functional circuit.

[0051] As can be seen from the above, the technical solution provided by the embodiments of the present application is that the anti-tearing line is arranged between the electrical functional circuit and the edge line of the flexible circuit board at the connecting corner of the circuit board main area and the circuit board bending area, which is equivalent to arranging an anti-tearing buffer area in front of the electrical functional circuit, thereby improving the anti-tearing capability of the flexible circuit board. When there is a tearing situation at the connecting corner of the circuit board main area and the circuit board bending area, the tearing opening will be blocked by the anti-tearing line, or the tearing opening is more likely to extend along the gap between the electrical functional circuit and the anti-tearing line, thereby achieving the purpose of protecting the electrical functional circuit, improving the reliability of the flexible circuit board, and avoiding the problem of waste of circuit board material.

[0052] In the description of the embodiments of the present application, it should be understood that the orientations or positional relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are the orientations or positional relationships shown based on the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second", and the like, as used in the description and the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms "first", "second", etc., are to be interpreted, by those skilled in the art, as a structural or positional description and not by a chronological or serial order, unless and except when the terms are used in context with order or sequence.

[0054] In the embodiments of the present application, unless specifically defined otherwise, the terms "mount", "connect", "connection", "contact", and the like, should not be construed that the described device, area or the like is necessarily directly connected to another device, area or the like. For example, the device or area "connected to" or "connected with" another device or area can be directly connected to or with another device or area, or be indirectly connected to or with another device or area through an intermediate device or area. Unless otherwise specified and limited, the terms "mount", "connect", "connection", "contact", and the like, should be understood in a broad sense.

[0055] In the embodiments of the present application, unless specifically defined otherwise, the terms "on", "above", and "under" should not be construed that the described device, area or the like is necessarily directly on, above or under another device, area or the like. For example, the device or area "on", "above" or "under" another device or area can be directly on, above or under another device or area, or be indirectly on, above or under another device or area through an intermediate device or area. Unless otherwise specified and limited, the terms "on", "above", and "under" should be understood in a broad sense.

[0056] In the embodiments of the present application, the terms "one embodiment", "an embodiment", or "some embodiments" do not mean the same embodiment or the same embodiments. The specific features, structures, materials or characteristics described in the above terms are included in at least one embodiment of the present application. In the description of the embodiments of the present application, the above terms are not necessarily directed to the same embodiment or the same embodiments. The specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it is to be understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A flexible wiring board resistant to tearing, characterized by, The flexible circuit board is divided into a circuit board body area and at least one circuit board bending area on one side of the circuit board body area. The flexible circuit board comprises: An electrical function circuit, which is located in the circuit board body area and extends to the circuit board bending area; A tear-resistant line, which is located at the connecting corner of the circuit board body area and the circuit board bending area, is located between the electrical function circuit and the edge line of the flexible circuit board, and has a gap between the tear-resistant line and the electrical function circuit.

2. The anti-tear flexible circuit board according to claim 1, wherein, At the connecting corner of the circuit board body area and the circuit board bending area, the tear-resistant line extends along the corner edge line of the connecting corner.

3. The anti-tear flexible circuit board of claim 1, wherein, The distance between the electrical function circuit and the tear-resistant line is not less than 0.25 mm.

4. The anti-tear flexible circuit board of claim 1, wherein, The width of the tear-resistant line is not less than 0.3 mm.

5. The anti-tear flexible circuit board of claim 1, wherein, At the connecting corner of the circuit board body area and the circuit board bending area, at least part of the line segment of the tear-resistant line extends as an arc line along the corner edge line of the connecting corner.

6. The anti-tear flexible circuit board of claim 5, wherein, At the connecting corner of the circuit board body area and the circuit board bending area, at least part of the line segment of the tear-resistant line extends as a circular arc line or a U-shaped line along the corner edge line of the connecting corner.

7. The anti-tear flexible circuit board of claim 5, wherein, At the connecting corner of the circuit board body area and the circuit board bending area, the arc radius of at least part of the line segment of the tear-resistant line extending as an arc line along the corner edge line of the connecting corner is not less than 2 mm.

8. The anti-tear flexible circuit board of claim 1, wherein, The flexible circuit board is a single-layer flexible circuit board, a double-layer flexible circuit board or a multi-layer flexible circuit board.

9. The anti-tear flexible circuit board of claim 1, wherein, The tear-resistant line is located in at least one circuit layer of the flexible circuit board.

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

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