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

Abstract

The invention discloses an anti-breaking structure and method for arranging a buffer sheet on the edge of a circuit board, and the structure achieves the effective isolation between an electronic wire and the edge of the circuit board through arranging a polyimide (PI) thin film or a polyester film with the thickness of less than 0.1 mm on the edge of a PCB, a copper foil circuit board or an FPC flexible circuit board. 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 of damage of the edge of the circuit board to a connecting part is solved in a more economical manner, and the durability and the safety of equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of circuit board design and manufacturing technology, and in particular to a breakage prevention structure and method with a buffer sheet set on the edge of the circuit board. Background Technology

[0002] In wearable heated clothing applications, the heating element is typically connected to electronic wires via PCB circuit boards, copper foil circuit boards, or FPC flexible circuit boards. These circuit boards serve as carriers for power connections, bearing the electrical connection between the heating material and the power source.

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

[0004] Specifically, the edges of circuit boards, especially sharp corners, are prone to cutting or squeezing connected electronic wires or heating materials under stress, leading to breakage of the electronic wires or damage to the heating materials. This physical damage not only affects the normal function of the equipment but may also cause potential safety hazards or even dangerous hot spots.

[0005] like Figure 1 As shown in Figure 8, wearable heated clothing needs to be washed after wearing, especially since washing machines and dryers are commonly used. Therefore, regardless of whether the PCB circuit board connecting the electronic wires inside the heating element is used or whether printed heating film or carbon-based film is used, copper foil or FPC flexible circuit board is needed as a carrier for power connection. Because the heating element is subjected to stress, torsion, bending and other effects during the washing process, the connected electronic wires are easily damaged or cut by the edges of the PCB circuit board, copper foil or FPC flexible circuit board, which may cause damage or danger.

[0006] like Figure 5 As shown, in the process of connecting carbon-based thin films or carbon paste printed films for heating with conductive adhesive to copper foil or FPC flexible circuit boards, 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 thin films or carbon paste printed films, creating dangerous hot spots.

[0007] In existing technologies, avoiding this problem typically relies on using or developing more wear-resistant, higher-quality materials, or employing complex processes to improve wear resistance. However, these methods significantly increase costs. Furthermore, even with these expensive materials and processes, physical damage to circuit boards under dynamic stress conditions, especially frequent bending and twisting, cannot be completely avoided.

[0008] Therefore, the technical problem to be solved by this invention is how to provide an effective circuit board edge protection structure without significantly increasing costs, so as to prevent electronic wires or heat-generating materials from being damaged by dynamic stress. Summary of the Invention

[0009] The technical problem solved by the present invention is to address the deficiencies in the prior art by providing a structure and method for preventing breakage by setting a buffer sheet on the edge of the circuit board, so as to solve the problem of physical damage to electronic lines or heating materials caused by the edge of the circuit board as mentioned in the background art.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0011] A breakage prevention structure with a buffer sheet on the edge of a circuit board includes a circuit board body, the circuit board body comprising a side and a side portion for wiring.

[0012] The anti-breakage structure with a buffer sheet at the edge of the circuit board also includes the buffer sheet;

[0013] A buffer sheet is attached to one side of the circuit board body, near the edge of the side, to provide buffering and protection between the circuit board edge and the electronic lines;

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

[0015] The buffer sheet is located between the corner portion and the electronic wire to prevent cuts, breaks or damage caused by the electronic wire coming into contact with the corner due to stress during washing or wearing.

[0016] As a further embodiment 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 aspect of the present invention, the thickness of the buffer sheet is less than 0.1 mm.

[0018] As a further aspect of the present invention, the buffer sheet is made of a flexible material that is elastic and durable, wherein the flexible material that is elastic and durable includes, but is not limited to, polyimide film or polyester film.

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

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

[0021] A method for preventing breakage by setting a buffer sheet on the edge of a circuit board includes the following steps:

[0022] Step 1: Provide a circuit board, which includes a side and a side for wiring, and the edges of the circuit board include angular portions;

[0023] Step 2: Prepare a cushioning sheet made of a flexible material that is both elastic and durable;

[0024] Step 3: Fix the buffer sheet to one side of the circuit board, with the fixing position close to the edge of the side of the circuit board, so that part of the buffer sheet is exposed, forming an extension for protecting the electronic lines;

[0025] Step 4: Adjust the extension of the buffer sheet to cover the area between the corners of the circuit board and the electronic wires, providing cushioning and preventing the electronic wires from being cut, broken, or damaged due to stress generated during washing or use.

[0026] A method for manufacturing a break-resistant structure includes the following steps:

[0027] S1, Select a circuit board and determine the corner parts of the circuit board's edge;

[0028] S2. Select a flexible buffer sheet with a thickness of less than 0.1 mm and cut it to an appropriate size;

[0029] S3, fix a portion of the buffer sheet to one side of the circuit board, ensuring that the extended portion of the buffer sheet covers the corner portion of the circuit board and the area between the electronic lines;

[0030] S4 ensures that the cushioning sheet remains stable after being fixed and will not shift or fall off during use or washing.

[0031] As a further aspect of the present invention, the corners of the circuit board body are rounded to further reduce physical damage to the electronic lines.

[0032] As a further aspect of the present invention, the surface of the buffer sheet has an antistatic coating to prevent potential damage to the electronic lines caused by static electricity accumulation.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. Dual Function of Buffering and Protection: This invention achieves effective isolation between electronic lines and the edges of the circuit board by setting a flexible buffer sheet with a thickness of less than 0.1 mm at the edge of the circuit board. This design not only provides physical isolation in a static state, but also plays a significant buffering role under dynamic stress conditions (such as twisting, bending, washing, etc.), reducing the possibility of electronic lines coming into contact with edges and corners, and greatly reducing the risk of cuts and breakage.

[0035] 2. Simplicity of Manufacturing Process: The anti-breakage structure and its manufacturing method involved in this invention are simple and easy to implement. The buffer sheet can be firmly connected 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, especially showing its advantages in large-scale production.

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a heating element that connects an existing PCB circuit board to a heating material.

[0039] Figure 2 This is a schematic diagram of the existing PCB circuit board and the soldering of electronic wires.

[0040] Figure 3 for Figure 2 A structural diagram from another perspective.

[0041] Figure 4 This is a schematic diagram of the structure of the electronic wire impacting the edge of an existing PCB circuit board.

[0042] Figure 5 This is a schematic diagram of the structure of a heating element that connects existing copper foil or FPC flexible circuit board to a heating material.

[0043] Figure 6 This is a schematic diagram showing the connection between existing copper foil or FPC flexible circuit boards and carbon-based thin films or carbon paste films.

[0044] Figure 7 for Figure 6 A structural diagram from another perspective.

[0045] Figure 8 This is a schematic diagram of the structure of an existing copper foil or FPC flexible circuit board with an impacted carbon-based film or carbon paste film on the board edge.

[0046] Figure 9 This is a schematic diagram of the structure of the present invention, which involves attaching a polyimide (PI) film to the edge of a PCB circuit board.

[0047] Figure 10 This is a schematic diagram of the structure of the polyimide (PI) film supporting the electron wires according to the present invention.

[0048] Figure 11 for Figure 10 A structural diagram from another perspective.

[0049] Figure 12 This is a schematic diagram of the structure of the present invention, in which the electronic wires are supported by a polyimide (PI) film to reduce the impact of sharp angles.

[0050] Figure 13 for Figure 12 Enlarged schematic diagram of part A.

[0051] Figure 14 This is a schematic diagram of the structure of the present invention, which involves attaching a polyimide (PI) film to the edge of a copper foil or FPC flexible circuit board.

[0052] Figure 15 This is a schematic diagram of the structure of the polyimide (PI) film supporting a carbon-based film or carbon paste film according to the present invention.

[0053] Figure 16 for Figure 15 A structural diagram from another perspective.

[0054] Figure 17 This is a schematic diagram of the structure of the carbon-based film or carbon paste film of the present invention protected by a polyimide (PI) film.

[0055] Figure 18 for Figure 17 Enlarged schematic diagram of part B.

[0056] The reference numerals and names in the figure are as follows:

[0057] The circuit board body includes: 1. One side; 2. Side; 3. Buffer sheet; 4. Electronic wire; 5. Angular part; 6. Extended support buffer protection area; 7. Heating element; 8. Detailed Implementation

[0058] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Please see Figure 9—18. In this embodiment of the invention, a breakage prevention structure with a buffer sheet on the edge of a circuit board includes a circuit board body 1, which includes a side surface 2 and a side portion 3 for wiring; the breakage prevention structure with a buffer sheet on the edge of the circuit board also includes a buffer sheet 4; the buffer sheet 4 is connected to the edge of the side surface 2 of the circuit board body 1 and near the edge 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 a corner portion 6 located at the edge; the buffer sheet 4 is located between the corner portion 6 and the electronic wire 5 to prevent cuts, breaks or damage caused by the contact between the electronic wire 5 and the corner due to stress during washing or wearing.

[0060] The circuit board body 1 is a PCB circuit board, copper foil circuit board, or 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, including but not limited to polyimide (PI) film or polyester film 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, near the side 3, so that part of the buffer sheet 4 is exposed to form an extended, 5 to 10 mm buffer protection area. The fixed connection is achieved by adhesive bonding.

[0061] A method for preventing breakage by setting a buffer sheet on the edge of a circuit board includes the following steps:

[0062] Step 1: Provide a circuit board, which includes a side 2 and a side 3 for wiring, and the edges of the circuit board include corner portions 6;

[0063] Step 2: Prepare a buffer sheet 4, which is made of a flexible material that is both elastic and durable;

[0064] Step 3: Fix the buffer sheet 4 to one side 2 of the circuit board, with the fixing position close to the edge of the side 3 of the circuit board, so that part of the buffer sheet 4 is exposed, forming an extension for protecting the electronic line 5.

[0065] Step 4: Adjust the extension of the buffer sheet 4 to cover the area between the corner of the circuit board 6 and the electronic wire 5, providing cushioning and preventing the electronic wire 5 from being cut, broken or damaged due to stress generated during washing or use.

[0066] A method for manufacturing a break-resistant structure includes the following steps:

[0067] S1, Select a circuit board and determine the corner portion of the circuit board's edge 6;

[0068] S2, Select a flexible buffer sheet 4 with a thickness of less than 0.1mm and cut it to an appropriate size;

[0069] 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 line 5.

[0070] S4 ensures that the buffer sheet 4 remains stable after being fixed and will not shift or fall off during use or washing.

[0071] The edges 6 of the circuit board body 1 are rounded to further reduce physical damage to the electronic lines 5. The surface of the buffer sheet 4 has an antistatic coating to prevent potential damage to the electronic lines 5 due to static electricity accumulation.

[0072] The innovation of this invention is to set a thin and elastic polyimide (PI) film, polyester film, or similar sheet (thickness less than 0.1 mm) on the edge of the relevant PCB circuit board, copper foil, or FPC flexible circuit board to reduce the stress impact on the edge of the PCB circuit board, copper foil, or FPC flexible circuit board caused by movement, which may lead to breakage or cutting.

[0073] Please see Figure 9 —13, the present invention provides a protective design to prevent breakage of the connection between the PCB circuit board and the electronic wire 5: one or more polyimide (PI) films or polyester films with a thickness of less than or equal to 0.1 mm are set on the edge of the PCB circuit board and exposed 5 to 10 mm7 to support the electronic wire 5 and mitigate the damage to the electronic wire from the strong and sharp edge of the PCB circuit board during use or washing, and prevent the conductors in the inner layer of the electronic wire 5 from breaking due to impact.

[0074] Please see Figure 14 —18. The present invention provides a cut-resistant design for the connection between copper foil or FPC flexible circuit board and carbon-based film: One or more polyimide (PI) films, each 5-10 mm thick, are exposed 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, supporting the heating carbon film. This mitigates the risk of burns caused by punctures from the copper foil or FPC flexible circuit board edge during use or washing. 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 to prevent damage from sharp edges of the FPC board.

[0075] Example 1:

[0076] In practical applications of wearable heated clothing, the heating element 8 is typically connected to the electronic wire 5 via a PCB circuit board, copper foil circuit board, or FPC flexible circuit board. These heating elements 8 are widely used in scenarios requiring durability and high safety, such as outdoor work, sportswear, and medical care clothing. However, in these applications, heated clothing often needs to withstand frequent washing, bending, and twisting, which can cause physical friction or compression between the edges of the existing circuit board and the electronic wire 5 or the heating material, potentially leading to breakage of the electronic wire 5 or damage to the heating material.

[0077] To address this issue, this embodiment provides a breakage prevention structure by setting a buffer sheet 4 at the edge of a PCB circuit board, copper foil circuit board, or FPC flexible circuit board. Specifically, a buffer sheet 4 with a thickness of less than 0.1 mm is adhered to the edge of the circuit board of the heated clothing, especially the corner portion 6. The buffer sheet 4 is fixed to the wiring surface of the circuit board by adhesive bonding and is located near the edge of the side portion 3, and is partially exposed to form an extension of the extended support buffer protection area 7, which is used to cover the corner portion 6 of the circuit board and the area between it and the electronic wire 5.

[0078] In practical use, when heated clothing is subjected to stress such as twisting or bending during washing or wearing, the buffer sheet 4 can significantly reduce the direct impact and friction between the circuit board edge and the electronic wires 5 or the heating material. Due to the flexibility and elasticity of the buffer sheet 4, even under dynamic stress conditions, the corner portion 6 of the circuit board can still maintain effective isolation from the electronic wires 5, thereby effectively preventing the breakage of the electronic wires 5 and the damage to the heating material.

[0079] After testing, the design of this embodiment showed significant effects during repeated washing and use. Compared with traditional high-cost materials or complex process solutions, it not only significantly reduced manufacturing costs, but also effectively improved the durability and safety of heat-generating clothing, avoiding potential safety hazards such as the formation of dangerous hot spots.

[0080] Example 2:

[0081] In wearable heated clothing that uses carbon-based thin films or carbon paste films as heating materials, flexible printed circuit boards (FPCs) or copper foil circuit boards are typically used to connect the heating material to the power source. Due to their lightweight and flexible characteristics, these heated garments are widely used in outdoor activities or healthcare settings requiring constant temperature control. However, in actual use, especially during washing, wearing, or exercise, the edges of these flexible circuit boards or copper foil circuit boards can easily cut or compress the thin-film heating material, leading to damage and creating dangerous heating points, seriously affecting the safety and lifespan of the heated clothing.

[0082] To address the aforementioned issues, in this embodiment, a polyimide (PI) film or a similar flexible material with a thickness of 0.05 mm or less is adhered to the edge of the circuit board. This film is fixed to the connection point between the FPC flexible circuit board or copper foil circuit board and the carbon-based film or carbon paste film by adhesive bonding, and is partially exposed to form an extension of the extended support and buffer protection area 7, thereby supporting and protecting the heat-generating film material.

[0083] During the use or washing of heat-generating clothing, especially when flexible circuit boards are deformed due to bending, twisting, or external forces, polyimide sheets can effectively reduce direct impact or cuts from the circuit board edges onto carbon-based or carbon paste films. Due to its good elasticity and durability, the sheet can continuously provide protection under dynamic stress conditions, thereby effectively preventing damage to the heat-generating material and avoiding the formation of heat spots.

[0084] This embodiment significantly improves the safety and durability of heated clothing, especially in situations involving repeated washing and complex movements, enabling it to maintain the integrity and functionality of the heating material over a long period. Compared to existing high-cost processes, this invention solves the problem of physical damage to the heating material caused by the edges of the circuit board in an economical and efficient manner, ensuring the reliability of heated clothing and user safety in practical applications.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0086] 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 invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A breakage prevention structure with a buffer sheet on the edge of a circuit board, comprising a circuit board body, the circuit board body including a side for wiring and a side portion, characterized in that: The anti-breakage structure with a buffer sheet at the edge of the circuit board also includes the buffer sheet; A buffer sheet is attached to one side of the circuit board body, near the edge of the side, to provide buffering and protection between the circuit board edge and the electronic lines; The circuit board body includes corner portions located at the edges; The buffer sheet is located between the corner portion and the electronic wire to prevent cuts, breaks or damage caused by the electronic wire coming into contact with the corner due to stress during washing or wearing.

2. The anti-breakage structure with a buffer sheet on the edge of the 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 on the edge of the 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 on the edge of the circuit board according to claim 1, characterized in that, The buffer sheet is made of a flexible material that is elastic and durable, including but not limited to polyimide sheets or polyester films.

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

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

7. A method for preventing breakage by setting a buffer sheet on the edge of a circuit board, characterized in that, Includes the following steps: Step 1: Provide a circuit board, which includes a side and a side for wiring, and the edges of the circuit board include angular portions; Step 2: Prepare a cushioning sheet made of a flexible material that is both elastic and durable; Step 3: Fix the buffer sheet to one side of the circuit board, with the fixing position close to the edge of the side of the circuit board, so that part of the buffer sheet is exposed, forming an extension for protecting the electronic lines; Step 4: Adjust the extension of the buffer sheet to cover the area between the corners of the circuit board and the electronic wires, providing cushioning and preventing the electronic wires from being cut, broken, or damaged due to stress generated during washing or use.

8. A method for manufacturing a breakage-resistant structure, characterized in that, Includes the following steps: S1, Select a circuit board and determine the corner parts of the circuit board's edge; S2. Select a flexible buffer sheet with a thickness of less than 0.1 mm and cut it to an appropriate size; S3, fix a portion of the buffer sheet to one side of the circuit board, ensuring that the extended portion of the buffer sheet covers the corner portion of the circuit board and the area between the electronic lines; S4 ensures that the cushioning sheet remains stable after being fixed and will not shift or fall off during use or washing.

9. A method for preventing breakage by setting a buffer sheet on the edge of a circuit board according to claim 8, characterized in that, The edges and corners of the circuit board body are rounded to further reduce physical damage to the electronic lines.

10. A method for preventing breakage by providing a buffer sheet on the edge of a circuit board according to claim 8, wherein the surface of the buffer sheet has an antistatic coating to prevent potential damage to electronic lines caused by static electricity accumulation.

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