Anti-breaking structure for arranging buffer sheet on edge of circuit board

Abstract

The utility model discloses an anti-breaking structure with a buffer sheet arranged at the edge of a circuit board, which realizes the effective isolation between an electronic wire and the edge of the circuit board by arranging a polyimide (PI) thin film or a polyester film with the thickness of less than 0.1 mm at the edge of a PCB (Printed Circuit Board), a copper foil circuit board or an FPC (Flexible Printed Circuit). The structure not only provides physical protection in a static state, but also remarkably reduces the cutting and breakage risks of electronic wires or heating materials under the dynamic stress conditions of the wearable heating clothes, such as washing, twisting and bending processes. Compared with a high-cost scheme using a more wear-resistant material or a complex process in the prior art, the problem that connecting parts are damaged by the edge of the circuit board is solved in a more economical manner, and the durability and the safety of equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board design and manufacturing, in particular to an anti-breakage structure with a buffer sheet arranged on the edge of a circuit board. Background Art

[0002] In wearable heating clothing, heating elements are typically connected to electronic wires via printed circuit boards (PCBs), copper foil printed circuit boards (CPCs), or flexible printed circuit boards (FPCs). These boards act as carriers for power connections, providing electrical connections between the heating material and the power source.

[0003] However, as wearable heating clothing frequently experiences dynamic stresses such as washing, twisting, and bending during actual use, the existing circuit board structure has exposed some serious problems during use.

[0004] Specifically, the edges of circuit boards, especially sharp corners, can easily cause stress and damage to connected electronic wires or heating materials, cutting or squeezing them. This physical damage not only affects the normal function of the device but can also pose potential safety hazards and even create dangerous hot spots.

[0005] like Figure 1 As shown in FIG8 , wearable heating clothing needs to be washed after wearing, especially in a washing machine and a dryer. Therefore, whether the PCB circuit board that connects the electronic wires inside the heating element or the printed heating film or carbon-based film, copper foil or FPC flexible circuit board needs to be used as a carrier for power connection as a connection. Because the heating element is subjected to stress, distortion and bending during the washing process, it is easy for the electronic wires connected to it to be broken or cut by the edge of the PCB circuit board, copper foil or FPC flexible circuit board, which may cause defects or dangers.

[0006] like Figure 5 As shown, in the process of connecting the heat-generating carbon-based film or carbon paste printed film with copper foil or FPC flexible circuit board using conductive adhesive, the sharp edges of the copper foil (thickness 0.03-0.05mm) or FPC flexible circuit board (thickness 0.1-0.2mm) can easily cut the carbon-based film or carbon paste printed film, causing dangerous hot spots.

[0007] Existing technologies typically rely on developing or adopting more wear-resistant, higher-quality materials, or employing complex processes to improve wear resistance, to avoid this problem. However, these methods significantly increase costs. Furthermore, even with these expensive materials and processes, physical damage cannot be completely avoided when circuit boards are subjected to dynamic stress, especially frequent bending and twisting.

[0008] Therefore, how to provide an effective circuit board edge protection structure without significantly increasing costs to prevent electronic wires or heating materials from being damaged by dynamic stress has become a technical problem to be solved by the present invention. Utility Model Content

[0009] The technical problem solved by the present invention is to address the defects existing in the above-mentioned prior art and provide an anti-breakage structure with a buffer sheet set at the edge of the circuit board to solve the problem of physical damage caused to electronic wires or heating materials by the edge of the circuit board proposed in the above-mentioned background technology.

[0010] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0011] An anti-break structure with a buffer sheet arranged on the edge of a circuit board, comprising a circuit board body, wherein the circuit board body comprises a surface for wiring and a side portion;

[0012] The anti-break structure with a buffer sheet arranged on the edge of the circuit board also includes a buffer sheet;

[0013] The buffer sheet is connected to one side of the circuit board body and close to the edge of the side to provide buffering and protection between the edge of the circuit board and the electronic wire;

[0014] The circuit board body includes angular portions located at the edges;

[0015] The buffer sheet is located between the corner part and the electronic wire to prevent the electronic wire from being cut, broken or damaged by the contact between the corner part and the electronic wire due to the stress during washing or wearing.

[0016] As a further solution of the present invention, the circuit board body is a PCB circuit board, a copper foil circuit board or an FPC flexible circuit board.

[0017] As a further solution of the present invention, the thickness of the buffer sheet is less than 0.1 mm.

[0018] As a further solution of the present invention, the buffer sheet is made of a flexible material with elasticity and durability, wherein the flexible material with elasticity and durability includes but is not limited to polyimide thin film or polyester film.

[0019] As a further solution of the present invention, the front half of one side of the buffer sheet is fixedly connected to the wiring side of the circuit board body and close to the side so that the buffer sheet is partially exposed to form an extended supporting buffer protection area of 5 to 10 mm.

[0020] As a further solution of the present invention, the fixed connection is a fixed connection by adhesive connection.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Dual Functions of Buffering and Protection: This utility model effectively isolates electronic wires from the circuit board's corners by placing a flexible buffer sheet less than 0.1mm thick on the edge of the circuit board. This design not only provides physical isolation in static conditions but also provides significant buffering under dynamic stress conditions (such as twisting, bending, and washing), reducing the possibility of electronic wires coming into contact with corners and significantly reducing the risk of cuts and breakage.

[0023] 2. Simple Manufacturing Process: The anti-breakage structure and its manufacturing method are simple and easy to implement. The buffer sheet can be securely attached to the edge of the circuit board by bonding or other fixing methods, ensuring that it will not shift or fall off during use or washing. This not only reduces manufacturing costs but also improves production efficiency, which is particularly advantageous in large-scale production.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 The figure is a schematic diagram of the structure of a heating sheet connected to an existing PCB circuit board and a heating material.

[0027] Figure 2 The figure is a schematic diagram of the structure of welding the existing PCB circuit board and electronic wire.

[0028] Figure 3 for Figure 2 Schematic diagram of the structure from another perspective.

[0029] Figure 4 The figure is a schematic diagram of the structure of the board edge impact electronic wire of the existing PCB circuit board.

[0030] Figure 5 This is a schematic diagram of the structure of a heating sheet that connects existing copper foil or FPC flexible circuit board with heating material.

[0031] Figure 6 This is a schematic diagram of connecting existing copper foil or FPC flexible circuit boards with carbon-based films or carbon paste films.

[0032] Figure 7 for Figure 6 Schematic diagram of the structure from another perspective.

[0033] Figure 8 The diagram is a structural diagram of the existing copper foil or FPC flexible circuit board edge impact carbon-based film or carbon paste film.

[0034] Figure 9 The utility model is a structural schematic diagram of pasting a polyimide (PI) thin film on the edge of a PCB circuit board.

[0035] Figure 10 This is a schematic diagram of the structure of the polyimide (PI) thin film supporting the electronic wire in the utility model.

[0036] Figure 11 for Figure 10 Schematic diagram of the structure from another perspective.

[0037] Figure 12 This is a schematic diagram of the structure of the utility model in which the electronic wire is supported by a thin polyimide (PI) film to mitigate sharp angle impacts.

[0038] Figure 13 for Figure 12 A magnified schematic diagram of part A.

[0039] Figure 14 The utility model is a structural schematic diagram of pasting a polyimide (PI) thin film on the edge of a copper foil or an FPC flexible circuit board.

[0040] Figure 15 This is a schematic diagram of the structure of a polyimide (PI) thin film supporting a carbon-based film or a carbon paste film in the utility model.

[0041] Figure 16 for Figure 15 Schematic diagram of the structure from another perspective.

[0042] Figure 17 This is a schematic structural diagram of the carbon-based film or carbon paste film of the utility model being protected by a polyimide (PI) thin film.

[0043] Figure 18 for Figure 17 An enlarged schematic diagram of part B.

[0044] The reference numerals and names in the figures are as follows:

[0045] The circuit board comprises a main body 1, a surface 2, a side portion 3, a buffer sheet 4, an electronic wire 5, an angular portion 6, an extended buffer protection area 7 and a heating sheet 8. DETAILED DESCRIPTION

[0046] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] See also Figure 9 —18. In an embodiment of the present utility model, a break-proof structure with a buffer sheet provided at the edge of a circuit board includes a circuit board body 1, the circuit board body 1 including a surface 2 for wiring and a side portion 3; the break-proof structure with a buffer sheet provided at the edge of the circuit board also includes a buffer sheet 4; the buffer sheet 4 is connected to one surface 2 of the circuit board body 1 and is close to the edge position of the side portion 3 to provide buffering and protection between the edge of the circuit board and the electronic wire 5; the circuit board body 1 includes an edge portion 6 located at the edge; the buffer sheet 4 is located between the edge portion 6 and the electronic wire 5 to prevent the electronic wire 5 from being cut, broken or damaged due to the stress caused by the contact between the edge and the electronic wire 5 during washing or wearing.

[0048] The circuit board body 1 is a PCB circuit board, a copper foil circuit board or an FPC flexible circuit board. The thickness of the buffer sheet 4 is less than 0.1 mm. The buffer sheet 4 is made of a flexible material with elasticity and durability, wherein the flexible material with elasticity and durability includes but is not limited to a polyimide (PI) thin film or a polyester film. The front half of one side of the buffer sheet 4 is fixedly connected to the side 2 of the circuit board body 1 used for wiring and close to the side 3 so that the buffer sheet 4 is partially exposed to form an extended support buffer protection area of 5 to 10 mm. The fixed connection is fixed by bonding.

[0049] A method for preventing breakage by providing a buffer sheet on the edge of a circuit board comprises the following steps:

[0050] Step 1: providing a circuit board, wherein the circuit board comprises a surface 2 for wiring and a side portion 3, and the edge of the circuit board comprises a corner portion 6;

[0051] Step 2: Prepare a buffer sheet 4 made of a flexible material with elasticity and durability;

[0052] Step 3: Fix the buffer sheet 4 to one side 2 of the circuit board, near the edge of the side 3 of the circuit board, so that the buffer sheet 4 is partially exposed to form an extension for protecting the electronic wire 5;

[0053] Step 4: Adjust the extended portion of the buffer sheet 4 to cover the area between the corner portion 6 of the circuit board and the electronic wire 5, providing a buffer and preventing the electronic wire 5 from being cut, broken or damaged due to stress generated during washing or use.

[0054] A method for manufacturing an anti-breakage structure comprises the following steps:

[0055] S1, select a circuit board and determine the corner portion 6 of the edge of the circuit board;

[0056] S2, select a flexible buffer sheet 4 with a thickness of less than 0.1 mm and cut it to an appropriate size;

[0057] S3, fix a portion of the buffer sheet 4 to one side 2 of the circuit board, ensuring that the extended portion of the buffer sheet 4 covers the area between the corner portion 6 of the circuit board and the electronic wire 5;

[0058] S4, ensures that the buffer sheet 4 remains stable after being fixed and does not shift or fall off during use or washing.

[0059] The corners 6 of the circuit board body 1 are rounded to further reduce physical damage to the electronic wires 5. The surface of the buffer sheet 4 has an antistatic coating to prevent potential damage to the electronic wires 5 due to static electricity accumulation.

[0060] The innovation of the present utility model is that a thin and elastic polyimide (PI) film or polyester film or similar sheet (with a thickness of less than 0.1 mm) is provided on the edge of the relevant PCB circuit board, the edge of the copper foil or the edge of the FPC flexible circuit board to reduce the stress impact of the PCB circuit board, the copper foil or the FPC flexible circuit board in the state of movement, thereby preventing the edge from breaking or cutting.

[0061] See also Figure 9 —13. The utility model has a design for preventing the connection between the PCB circuit board and the electronic wire 5 from being broken: one or more thin polyimide (PI) films or polyester films with a thickness of less than or equal to 0.1 mm are provided on the edge of the PCB circuit board with 5 to 10 mm7 exposed to support the electronic wire 5 to alleviate the damage caused by the strong and sharp edge of the PCB circuit board to the electronic wire during use or washing, and the wire in the rubber layer of the electronic wire 5 being broken due to impact.

[0062] See also Figure 14—18. This utility model provides a cut-proof protection design for the connection between copper foil or FPC flexible circuit boards and carbon-based films: One or more thin polyimide (PI) films less than or equal to 0.05mm thick are placed at the edge of the board where the copper foil or FPC flexible circuit board connects to the carbon paste film or carbon-based film, with 5-10mm exposed. This supports the heating carbon film. This is used to mitigate the risk of burns caused by punctures from the copper foil or FPC flexible circuit board edge during use or laundry. A layer of PI film is placed between the FPC and the heating material (carbon-based film or carbon paste film) at the connection point between the FPC board and the carbon film or carbon paste printed film to prevent damage caused by the sharp edge of the FPC board.

[0063] Example 1:

[0064] In the actual application of wearable heating clothing, the heating sheet 8 is usually connected to the electronic wire 5 through a PCB circuit board, a copper foil circuit board, or an FPC flexible circuit board. These heating sheets 8 are widely used in scenarios requiring durability and high safety, such as outdoor work, sportswear, and medical care clothing. However, in these application scenarios, heating clothing often needs to withstand frequent washing, bending, and twisting and other dynamic stresses, resulting in physical friction or compression between the edges of the existing circuit board and the electronic wire 5 or the heating material, thereby causing the risk of breaking the electronic wire 5 or damaging the heating material.

[0065] To address this issue, this embodiment provides a structure that prevents breakage by placing a buffer sheet 4 on the edge of a PCB, copper foil circuit board, or flexible circuit board. Specifically, a buffer sheet 4 with a thickness of less than 0.1 mm is attached to the edge of the circuit board, particularly the corners 6, of the heating garment. This buffer sheet 4 is adhesively secured to the wiring surface of the circuit board near the edge of the side 3, with a partially exposed portion extending to support the buffer protection area 7, covering the corners 6 and the area between the electronic wires 5.

[0066] In actual use, when heating clothing is subjected to twisting, bending, and other stresses during washing or wearing, the buffer sheet 4 significantly reduces direct impact and friction between the circuit board's edges and the electronic wires 5 or heating materials. Due to the buffer sheet's flexibility and elasticity, even under dynamic stress, the circuit board's corners 6 remain effectively isolated from the electronic wires 5, effectively preventing breakage of the electronic wires 5 and damage to the heating materials.

[0067] After testing, the design of this embodiment has shown significant effects during repeated washing and use. Compared with traditional high-cost materials or complex process solutions, it not only greatly reduces manufacturing costs, but also effectively improves the durability and safety of heating clothing, avoiding potential safety hazards such as the formation of dangerous hot spots.

[0068] Example 2:

[0069] In wearable heating garments that use carbon-based films or carbon paste films as heating materials, flexible printed circuit boards (FPCs) or copper foil printed circuit boards are typically used to connect the heating material to a power source. Due to their lightness and flexibility, these heating garments are widely used in outdoor activities or healthcare scenarios that require constant temperature control. However, in actual use, especially during washing, wearing, or exercise, the edges of these flexible printed circuit boards or copper foil printed circuit boards can easily cut or squeeze the film-based heating material, causing damage to the heating material and forming dangerous hot spots, seriously affecting the safety and lifespan of the heating garment.

[0070] To address this issue, in this embodiment, a thin polyimide (PI) film or similar flexible material sheet with a thickness of less than or equal to 0.05 mm is attached to the edge of the circuit board. This sheet is bonded to the connection between the FPC or copper foil circuit board and the carbon-based film or carbon paste film, with a portion of the sheet exposed to form an extension of the buffer protection area 7, thereby supporting and protecting the heating film material.

[0071] During the use or washing of heating clothing, especially when flexible circuit boards are deformed by bending, twisting, or external forces, polyimide sheets can effectively reduce direct impact or cuts from the circuit board's edges on the carbon-based film or carbon paste film. Due to its excellent elasticity and durability, the sheet can continuously provide protection under dynamic stress conditions, effectively preventing damage to the heating material and avoiding the formation of hot spots.

[0072] This embodiment significantly improves the safety and durability of heating clothing, particularly during repeated washing and complex exercise environments, maintaining the integrity and functionality of the heating material over time. Compared to existing high-cost processes, this invention economically and efficiently solves the problem of physical damage to the heating material from the edges of the circuit board, ensuring the reliability and user safety of heating clothing in practical applications.

[0073] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0074] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A circuit board anti-breakage structure with a buffer sheet provided on the edge of a circuit board, comprising a circuit board body, the circuit board body including a surface for wiring and a side portion, characterized in that: The anti-break structure with a buffer sheet arranged on the edge of the circuit board also includes a buffer sheet; The buffer sheet is connected to one side of the circuit board body and close to the edge of the side; The circuit board body includes angular portions located at the edges; The buffer sheet is located between the corner portion and the electron wire.

2. The anti-breakage structure with a buffer sheet provided on the edge of a circuit board according to claim 1, characterized in that: The circuit board body is a PCB circuit board, a copper foil circuit board or an FPC flexible circuit board.

3. The anti-breakage structure with a buffer sheet provided on the edge of a circuit board according to claim 1, characterized in that: The thickness of the buffer sheet is less than 0.1 mm.

4. The anti-breakage structure with a buffer sheet provided on the edge of a circuit board according to claim 1, characterized in that: The buffer sheet is made of a flexible material with elasticity and durability, wherein the flexible material with elasticity and durability includes but is not limited to a polyimide film or a polyester film.

5. The anti-breakage structure with a buffer sheet provided on the edge of a circuit board according to claim 1, characterized in that: The front half of one side of the buffer sheet is fixedly connected to a side of the circuit board body for wiring and close to the side portion so that the buffer sheet is partially exposed to form an extended supporting buffer protection area of 5 to 10 mm.

6. The anti-breakage structure with a buffer sheet provided on the edge of a circuit board according to claim 5, characterized in that: The fixed connection is fixed by bonding.

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