A flexible PCB and electronic device
Through innovative flexible substrate design and folded areas, multi-layer protection for signal lines is achieved, simplifying the PCB structure, reducing costs, and improving the security and concealment of signal lines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN LANDI COMMERCIAL EQUIPMENT CO LTD
- Filing Date
- 2025-04-22
- Publication Date
- 2026-05-26
AI Technical Summary
Existing PCB boards have become more complex and costly when protecting signal lines, making it difficult to achieve effective protection by simplifying the structure.
The design employs a flexible substrate, featuring a two-layer structure of signal lines and protective windings. Two or four layers of protection are achieved through the folding of the folded area and the main area. Combined with the cutout area and serpentine line design, the PCB structure is simplified.
It achieves double or quadruple protection for signal lines, simplifies PCB structure, reduces costs, and improves the safety and concealment of signal lines.
Smart Images
Figure CN224290145U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board information security technology, and in particular to a flexible PCB and electronic equipment. Background Technology
[0002] In related technologies, PCB boards need to protect signal lines by winding to prevent unauthorized data access. To ensure signal line security, multi-layer boards with multiple layers of winding are typically used, leading to a more complex PCB structure and increased costs. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a flexible PCB and electronic device that can protect signal lines while simplifying the PCB structure.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0005] A flexible PCB includes a flexible substrate; the flexible substrate includes a two-layer structure, one layer being a signal line and the other layer being a protective winding; the flexible substrate is provided with a folding region and a main region; the folding region is provided with a signal line to be protected; the folding region is used to fold with the main region so that the signal line to be protected is covered by the main region.
[0006] Furthermore, a hollow area is provided between the folded area and the main area; the folded area and the main area are folded along the hollow area.
[0007] Furthermore, the flexible substrate is convex in shape, including a protrusion and a flat portion; the protrusion can be folded with the flat portion; the folding area is disposed on the protrusion; and the main area is disposed on the flat portion.
[0008] Furthermore, the flexible substrate can be folded along a perpendicular line to the intersection of the folded region and the main region.
[0009] Furthermore, the flexible substrate includes at least three layers; including one layer of the signal line and at least two layers of the protective winding.
[0010] Furthermore, the protective winding includes a serpentine wire.
[0011] Furthermore, it also includes a main line area; the main line area is provided with a main line; the main line is connected to the signal line.
[0012] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0013] An electronic device includes a housing, a main circuit board, and a flexible PCB as described above; both the main circuit board and the flexible PCB are disposed within the housing; the flexible PCB is connected to the main circuit board.
[0014] Furthermore, the folded area of the flexible PCB is located between its protective winding area and the main circuit board.
[0015] Furthermore, the main circuit board is disposed in the middle layer of the folded flexible PCB.
[0016] The beneficial effects of this utility model are as follows: by setting a signal line and a protective winding on a flexible substrate, and setting a foldable area and a main area that can be folded relative to each other, and setting the signal line to be protected in the foldable area, after folding the foldable area and the main area, the signal line to be protected is covered by the main area, so that the signal line to be protected can achieve two layers of protection. The first layer is the protection of the protective winding of the foldable area itself, and the second layer is the protection of the protective winding of the main area. Compared with the solution that requires the use of multi-layer boards in related technologies, this utility model simplifies the PCB structure and reduces costs while protecting the signal line. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a flexible PCB in an embodiment of this utility model;
[0018] Figure 2 This is another structural schematic diagram of a flexible PCB according to an embodiment of the present invention;
[0019] Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present utility model;
[0020] Label Explanation:
[0021] 100. Flexible substrate; 101. Protrusion; 102. Flattened portion;
[0022] 1. Signal line; 2. Protection winding; 3. Main line;
[0023] 10. Folded area; 20. Main area; 30. Hollowed-out area; 40. Main circuit area;
[0024] 200, housing; 300, main circuit board. Detailed Implementation
[0025] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0026] In related technologies, PCBs need to protect signal lines by wire wrapping to prevent unauthorized data access. Taking commonly available double-layer boards as an example, a single layer typically provides wire wrapping protection while the other layer carries the signal lines. However, some certifications require double-layer wire wrapping protection to prevent data theft. Therefore, implementing double or multiple layers of wire wrapping protection necessitates customizing PCBs with more layers, increasing PCB costs and complicating the PCB structure. To address these technical problems, this invention provides the following technical solution:
[0027] A flexible PCB includes a flexible substrate; the flexible substrate includes a two-layer structure, one layer being a signal line and the other layer being a protective winding; the flexible substrate is provided with a folding region and a main region; the folding region is provided with a signal line to be protected; the folding region is used to fold with the main region so that the signal line to be protected is covered by the main region.
[0028] As described above, the beneficial effects of this utility model are as follows: by setting a signal line and a protective winding on a flexible substrate, and setting a foldable area and a main area, and placing the signal line to be protected in the foldable area, after folding the foldable area and the main area, the signal line to be protected is covered by the main area, so that the signal line to be protected can achieve two layers of protection. The first layer is the protection of the protective winding of the foldable area itself, and the second layer is the protection of the protective winding of the main area. Compared with the solution that requires the use of multi-layer boards in related technologies, this utility model simplifies the PCB structure and reduces costs while protecting the signal line.
[0029] Furthermore, a cutout area is provided between the folded area and the main area; the folded area and the main area are folded along the cutout area.
[0030] As described above, by setting a hollow area between the folding area and the main area, the connection strength between the folding area and the main area is weakened, making it easier to fold the folding area and the main area, and reducing the thickness of the folding area after folding, which is more conducive to the installation of the flexible substrate.
[0031] Furthermore, the flexible substrate is U-shaped, including a protrusion and a flat portion; the protrusion can be folded with the flat portion; the folded area is disposed on the protrusion; and the main area is disposed on the flat portion.
[0032] As described above, by setting the flexible substrate to a convex shape and setting the folding area on the protrusion, that is, by setting the signal line that needs to be protected to a separate folding area, it is possible to protect the signal line without folding the entire flexible substrate when folding, but only by folding the folding area.
[0033] Furthermore, the flexible substrate can be folded along the perpendicular line of the intersection of the folded area and the main area.
[0034] As described above, by folding the flexible substrate along the perpendicular line of the intersection of the folded area and the main area, i.e., by folding the flexible substrate twice, the protective winding can provide four layers of protection for the signal line, thereby improving the protection effect of the signal line.
[0035] Furthermore, the flexible substrate includes at least three layers; including one signal line and at least two protective windings.
[0036] As can be seen from the above description, when the flexible substrate is a multilayer board, by setting up multiple layers of protective windings and in conjunction with a foldable structure, the signal lines can be more effectively protected.
[0037] Furthermore, the protective winding includes a serpentine winding.
[0038] As can be seen from the above description, by setting the protective winding to a grid pattern, the signal line can be effectively protected.
[0039] Furthermore, it also includes the main line area; the main line area is equipped with a main line; the main line is connected to the signal line.
[0040] As can be seen from the above description, by setting up a main circuit area for arranging the main circuit, the design requirements for circuit functions can be met.
[0041] Another embodiment of this utility model provides an electronic device, including a housing, a main circuit board, and a flexible PCB as described above; both the main circuit board and the flexible PCB are disposed within the housing; the flexible PCB is connected to the main circuit board. For example, the electronic device can be a POS machine or other financial payment device.
[0042] As described above, by using a flexible PCB with signal lines placed in the folded area in electronic devices, sensitive signals on the PCB can be protected, preventing the data of the signal lines from being illegally obtained and improving data security.
[0043] Furthermore, the folded area of the flexible PCB is located between its protective winding area and the main circuit board.
[0044] As described above, by placing the folded area of the flexible PCB between its protective winding area and the main circuit board, the signal lines in the folded area are concealed between the main circuit board and the protective winding area, thus improving the protection effect of the signal lines.
[0045] Furthermore, the main circuit board is located in the middle layer of the folded flexible PCB.
[0046] As described above, by placing the main circuit board in the middle layer of the folded flexible PCB, that is, by folding the flexible PCB twice with the main circuit board as the plane, the flexible PCB covers both sides of the main circuit board, and the signal lines in the folded area are placed between the main circuit board and the protective winding area, thereby providing a more effective protection for the signal lines.
[0047] The flexible PCB and electronic device provided by this utility model can be applied in scenarios where signal lines need to be protected, such as in POS machines, to protect critical signal lines in the POS machine. The following is a detailed description of the specific implementation:
[0048] Example 1
[0049] Please refer to Figure 1 A flexible PCB includes a flexible substrate 100. The flexible substrate 100 has a two-layer structure: one layer for signal lines 1 and the other layer for protective windings 2. The flexible substrate 100 has a folding region 10 and a main region 20. The folding region 10 has the signal line 1 to be protected. The folding region 10 is folded with the main region 20 so that the signal line 1 to be protected is covered by the main region 20. In other optional embodiments, the flexible substrate 100 includes at least three layers: one layer of signal lines 1 and at least two layers of protective windings 2. For example, if the flexible substrate 100 is a three-layer board, it includes one layer of signal lines 1 and two layers of protective windings 2; if the flexible substrate 100 is a four-layer board, it includes one layer of signal lines 1 and two layers of protective windings 2.
[0050] like Figure 1 As shown, the flexible substrate 100 is U-shaped, including a protrusion 101 and a flat portion 102; the protrusion 101 can be folded with the flat portion 102; a folding region 10 is disposed on the protrusion 101; and a main region 20 is disposed on the flat portion 102. Simultaneously, a cutout region 30 is provided between the folding region 10 and the main region 20; the folding region 10 and the main region 20 are folded along the cutout region 30; furthermore, the flexible substrate 100 can be folded along the perpendicular line of the intersection line of the folding region 10 and the main region 20. Taking a double-layer flexible substrate 100 as an example, the flexible substrate 100 in this embodiment includes a signal line 1 and a protective winding 2. Unlike related technologies, a folding region 10 is added, thereby achieving at least two layers of winding protection by folding the folding region 10; for example, folding with the cutout region 30 as the center line, i.e., the folding region 10 covers the main region 20, achieving two layers of winding protection; please refer to... Figure 1 If the flexible substrate 100 is folded along the perpendicular line of the intersection of the folded area 10 and the main area 20 with the AA line as the center line, then four layers of wire wrapping protection can be achieved.
[0051] Please refer to Figure 2It also includes a main line area 40; the main line area 40 is equipped with a main line 3; the main line 3 is connected to the signal line 1; wherein, the protective winding line 2 is a serpentine line.
[0052] Example 2
[0053] Please refer to Figure 3 An electronic device includes a housing 200, a main circuit board 300, and a flexible PCB as described in Embodiment 1. Both the main circuit board 300 and the flexible PCB are disposed within the housing 200; the flexible PCB is connected to the main circuit board 300. The folded area 10 of the flexible PCB is located between its protective winding 2 area and the main circuit board 300; simultaneously, the main circuit board 300 is disposed in the middle layer of the folded flexible PCB. The portions at both ends of the folded area 10 are protected by concealing them under the main circuit board 300 or other circuit boards. Due to structural space limitations, the folded area 10 cannot be manually opened. The electronic device can be a financial payment device such as a POS machine. For example, when applied to a POS machine, it protects the critical signal line 1 within the POS machine.
[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A flexible PCB, characterized in that, Including flexible substrates; The flexible substrate comprises a two-layer structure, one layer being signal lines and the other layer being protective windings; The flexible substrate is provided with a folding area and a main area; The folded area is equipped with a signal line to be protected; The folded area is used to fold with the main area so that the signal line to be protected is covered by the main area.
2. The flexible PCB according to claim 1, characterized in that, A hollow area is provided between the folded area and the main area; The folded area and the main area are folded along the hollowed-out area.
3. A flexible PCB according to claim 1, characterized in that, The flexible substrate is convex in shape, including protrusions and flat sections; The protrusion can be folded with the flattened portion; The folded area is located on the protrusion; The main area is located on the flat section.
4. A flexible PCB according to claim 1, characterized in that, The flexible substrate can be folded along the perpendicular line of the intersection line between the folded area and the main area.
5. A flexible PCB according to claim 1, characterized in that, The flexible substrate comprises at least three layers; It includes one layer of the signal line and at least two layers of the protective winding.
6. A flexible PCB according to claim 1 or 5, characterized in that, The protective winding includes a serpentine wire.
7. A flexible PCB according to claim 1, characterized in that, It also includes the main line area; The main line area is equipped with a main line; The main line is connected to the signal line.
8. An electronic device, characterized in that, Includes a housing, a main circuit board, and a flexible PCB as described in any one of claims 1-7; Both the main circuit board and the flexible PCB are disposed within the housing; The flexible PCB is connected to the main circuit board.
9. An electronic device according to claim 8, characterized in that, The folded area of the flexible PCB is located between its protective winding area and the main circuit board.
10. An electronic device according to claim 9, characterized in that, The main circuit board is disposed in the middle layer of the folded flexible PCB.