Flexible wiring board with bend protection

Abstract

The utility model discloses a flexible circuit board with bending protection, base plate, be provided with at least one module area and at least one bending area on the base plate, the module area is provided with component, and the bending area is located between adjacent module area and is not provided with component, and the protection structure includes first base, second base and two clamping parts, the first base is hinged with second base, and two clamping parts are fixed on the first base and second base respectively, the first base can be relatively rotated with second base to close to constitute the bending resistance base together, and make two clamping parts clamp the edge of base plate, and the inside of clamping part is equipped with the adhesive layer, is used for strengthening fixed. The utility model technical scheme aims at realizing the adjustable direction and detachable protection of component area of flexible circuit board.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board technology, and in particular to a flexible circuit board with bending protection. Background Technology

[0002] Flexible printed circuits (FPCs) play a crucial role in modern electronic devices due to their excellent bendability, and are widely used in scenarios requiring dynamic bending or compact assembly, such as display modules, foldable devices, and camera modules. In practical applications, FPCs are typically divided into different functional areas, with the functionally sensitive areas being particularly critical. These areas usually have various core components (such as chips, capacitors, resistors, and connectors) soldered on or contain critical circuits (such as high-frequency signal transmission lines and power buses). These areas are extremely sensitive to mechanical stress. Unexpected bending during production assembly, system testing, or final use can easily lead to component detachment, solder joint cracking, or breakage of precision circuits, directly causing circuit malfunction and severely impacting product reliability and yield. Utility Model Content

[0003] The main purpose of this invention is to provide a flexible circuit board with bending protection, which aims to achieve adjustable orientation and detachable protection for the component area of ​​the flexible circuit board.

[0004] To achieve the above objectives, the present invention provides a flexible circuit board with bending protection, comprising:

[0005] A substrate having at least one module region and at least one bending region disposed thereon, the module region having components disposed thereon, and the bending region being located between adjacent module regions and having no components disposed thereon; and

[0006] The protective structure includes a first base, a second base, and two clamping parts. The first base and the second base are hinged together, and the two clamping parts are respectively fixed to the first base and the second base. The first base and the second base can rotate relative to each other to close together to form an anti-bending base and clamp the edge of the substrate. An adhesive layer is provided on the inner side of the clamping part to enhance the fixation.

[0007] Wherein, when the protective structure is installed on the first side of the module area, the anti-bending base extends along the first extension direction of the substrate to restrict the module area from bending along the first protection direction; when the protective structure is installed on the second side of the module area, the anti-bending base extends along the second extension direction of the substrate to restrict the module area from bending along the second protection direction; and the first extension direction and the second extension direction intersect each other, and the first protection direction and the second protection direction intersect each other.

[0008] In one possible implementation, the bending base ends of two adjacent protective structures are provided with mutually compatible fastening structures, the fastening structures including fastening protrusions and fastening grooves, the fastening protrusions and fastening grooves being separably fastened together so that adjacent protective structures can be spliced ​​together.

[0009] In one possible implementation, the adhesive layer is a magnetic adsorption layer, and the magnetic adsorption layer is made of permanent magnet material.

[0010] In one possible implementation, the adhesive layer is made of a reusable adhesive material, and the surface of the adhesive layer is covered with a peelable release film.

[0011] This utility model's technical solution achieves precise protection of flexible circuit board module areas through a detachable and rotatable hinged protective structure, solving the technical problems of traditional fixed reinforcing plates that cannot flexibly adjust the protective direction and are difficult to reuse. At the same time, the magnetic adsorption layer or reusable adhesive layer set on the inner side of the clamping part enables rapid and non-destructive assembly, disassembly, and position adjustment of the protective structure, effectively avoiding the problem of residual adhesive and damage to the substrate surface. In addition, the modular design greatly improves the versatility and economy of the protective structure, significantly reducing production and maintenance costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the structure of one embodiment of the present invention from another perspective.

[0015] Explanation of icon numbers:

[0016] 1. Substrate; 11. Module area; 111. Components; 12. Bending area; 2. Protective structure; 21. Anti-bending base; 22. Clamping part; 23. Adhesive layer; 3. Fastening structure; 31. Fastening protrusion; 32. Fastening groove.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] To address the problems in the background technology, this utility model proposes a flexible circuit board with bending protection, comprising:

[0020] A substrate 1, wherein at least one module region 11 and at least one bending region 12 are disposed on the substrate 11, wherein the module region 11 is provided with components 111, and the bending region 12 is located between adjacent module regions 11 and is not provided with components 111; and

[0021] Multiple protective structures 2 are provided, each of which is provided corresponding to the module area 11 and is detachably clamped to the edge of the substrate 1 to form peripheral protection for the module area 11. Each of the protective structures 2 includes an anti-bending base 21 and two clamping parts 22. The two clamping parts 22 are respectively hinged to the two ends of the anti-bending base 21 and together form a clamping space for clamping the substrate 1. An adhesive layer 23 is provided on the inner side of the clamping part 22.

[0022] When the protective structure 2 is installed on the first side of the module region 11, the anti-bending base 21 extends along the first extending direction of the substrate 1 to restrict the module region 11 from bending along the first protective direction; when the protective structure 2 is installed on the second side of the module region 11, the anti-bending base 21 extends along the second extending direction of the substrate 1 to restrict the module region 11 from bending along the second protective direction; and the first extending direction and the second extending direction intersect each other, and the first protective direction and the second protective direction intersect each other.

[0023] Combined with reference Figures 1 to 2 As shown, in this embodiment, the flexible circuit board includes a substrate 1 and multiple protective structures 2. The substrate 1 uses a conventional flexible circuit board substrate, and its surface is functionally divided into at least one module area 11 and at least one bending area 12. The module area 11 houses components 111 such as chips, capacitors, resistors, and connectors, and is the core area carrying the circuit function. The bending area 12 is located between two adjacent module areas 11. This area contains no components 111, only the basic circuit layer, and the circuit routing adopts a rounded transition design to meet the flexible bending requirements.

[0024] The protective structure 2 is provided one-to-one with the module area 11 and is detachably clamped to the edge of the substrate 1 to form circumferential protection for the module area 11. Each protective structure 2 consists of a first base, a second base and two clamping parts 22: the first base and the second base are rotatably connected by a hinge shaft, both are made of rigid materials (such as stainless steel, polyoxymethylene or glass fiber reinforced resin) and have sufficient bending strength. The two clamping parts 22 are respectively fixedly connected to the ends of the first base and the second base away from the hinge shaft. Their material can be a slightly elastic engineering plastic, and each has an adhesive layer 23 on the inside. During installation, the first base and the second base are rotated relative to each other to a closed state via the hinge shaft. At this time, the two are spliced ​​to form a continuous integral structure (i.e., the anti-bending base 21). At the same time, the two clamping parts 22 are rotated synchronously, so that they are brought closer together and form a clamping space that matches the edge thickness of the substrate 1, thereby achieving mechanical clamping of the edge of the substrate 1. The adhesive layer 23 on the inner side of the clamping part 22 is attached to the surface of the substrate 1, and the fixation reliability is further enhanced by adhesive or magnetic attraction.

[0025] In addition, as another preferred embodiment, the anti-bending base 21 is integrally made of a material with preset rigidity. Its cross-section can be designed as U-shaped, L-shaped or arc-shaped according to the edge contour of the module area 11 to ensure that it fits the edge of the module area 11 and resists bending by external force through its own rigidity. The two clamping parts 22 are respectively hinged to the two ends of the anti-bending base 21. A damping structure or torsion spring can be provided at the hinge to allow the clamping parts 22 to open and close flexibly and maintain a clamped state. A clamping space adapted to the edge thickness of the substrate 1 is formed between the two clamping parts 22.

[0026] When installed on the first side (e.g., the left and right sides) of the module region 11, the closed anti-bending base 21 extends along the first extension direction (e.g., the width direction) of the substrate 1, using its rigidity to resist external forces and restricting the module region 11 from bending along the first protection direction (e.g., the vertical direction); when installed on the second side (e.g., the top and bottom sides) of the module region 11, the anti-bending base 21 extends along the second extension direction (e.g., the length direction) of the substrate 1, restricting the module region 11 from bending along the second protection direction (e.g., the left and right direction). Since the first extension direction and the second extension direction, as well as the first protection direction and the second protection direction, intersect each other (preferably perpendicularly), all-round protection of the module region 11 can be formed.

[0027] In one possible implementation, the ends of the bending base 21 of two adjacent protective structures 2 are provided with mutually compatible fastening structures 3. The fastening structure 3 includes a fastening protrusion 31 and a fastening groove 32. The fastening protrusion 31 and the fastening groove 32 can be separably fastened together so that the adjacent protective structures 2 can be spliced ​​together.

[0028] Combined with reference Figure 1 and Figure 2As shown in this embodiment, specifically, the length of the bending base 21 of a single protective structure 2 can be designed to a fixed size (e.g., 10-30mm) according to the conventional small module area 11. When facing a larger module area 11 (e.g., a medium or large module whose length or width exceeds the coverage of a single protective structure 2), multiple protective structures 2 can be sequentially spliced ​​along the edge of the module area 11 through the fastening structure 3. For example, two protective structures 2 can be spliced ​​together as a whole through the cooperation of the fastening protrusion 31 and the fastening groove 32 to form a protective frame that extends continuously along the edge of the module area 11, and its total length is adapted to the size of the module area 11. Similarly, for module areas 11 with different widths, the width of the overall protection range can be adjusted by increasing or decreasing the number of spliced ​​protective structures 2 to ensure that the protective frame can completely cover the edge of the module area 11, avoiding incomplete protection due to the excessive size of the module. For smaller module areas 11 (such as micro-modules with a length less than a single protective structure 2), a single protective structure 2 can be used, or the protective structures 2 can be cut to fit the length (while retaining the basic snap-fit ​​structure 3) and spliced ​​together without the need to redesign a dedicated protective structure 2.

[0029] In one possible implementation, the adhesive layer 23 is a magnetic adsorption layer, and the magnetic adsorption layer is made of permanent magnet material.

[0030] In this embodiment, the adhesive layer 23 provided inside the clamping part 22 of the protective structure 2 is specifically a magnetic adsorption layer. This magnetic adsorption layer is made of permanent magnet material, preferably high-performance permanent magnets such as neodymium iron boron, samarium cobalt, or ferrite, and is fixed to the inner surface of the clamping part 22 by molding or bonding processes. In actual assembly, if a magnetically conductive metal layer or matching soft magnetic material is provided at the corresponding position on the edge of the substrate 1, reliable clamping and fixing can be achieved through magnetic attraction; if the substrate 1 itself is not magnetic, magnetic adsorption layers can also be provided inside the clamping parts 22 on both sides of the substrate 1, utilizing the principle of magnetic pole attraction to enhance the clamping force.

[0031] In one possible implementation, the adhesive layer 23 is made of a reusable adhesive material, and the surface of the adhesive layer 23 is covered with a peelable release film.

[0032] In this embodiment, the adhesive layer 23 disposed on the inner side of the clamping part 22 in the protective structure 2 is made of a reusable adhesive material. Specifically, the adhesive material is preferably silicone pressure-sensitive adhesive or acrylic removable adhesive, which have the characteristics of adjustable adhesion and minimal residue after repeated application. The thickness of the adhesive layer 23 is controlled within the range of 0.1-0.5 mm, which ensures sufficient adhesion while facilitating subsequent peeling. A peelable release film is covered on the surface of the adhesive layer 23. This release film is typically made of single-sided or double-sided non-stick PET film, PE film, or glassine paper. Its function is to protect the adhesive layer 23 from contamination or premature adhesion during production, transportation, and storage, ensuring long-lasting and effective adhesion.

[0033] In the actual assembly process, the operator first removes the release film to expose the clean surface of the adhesive layer 23. Then, the protective structure 2 is positioned at a designated location on the edge of the substrate 1. Reliable fixation is achieved through the mechanical clamping of the clamping part 22 and the adhesion of the adhesive layer 23. When it is necessary to adjust the position of the protective structure 2 or disassemble it, only an appropriate peeling force needs to be applied to separate the adhesive layer 23 from the substrate 1 without damaging the solder mask or markings on the surface of the substrate 1.

[0034] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flexible circuit board with bending protection, characterized in that, include: A substrate having at least one module region and at least one bending region disposed thereon, the module region having components disposed thereon, and the bending region being located between adjacent module regions and having no components disposed thereon; and The protective structure includes a first base, a second base, and two clamping parts. The first base and the second base are hinged together. The two clamping parts are respectively fixed to the first base and the second base. The first base and the second base can rotate relative to each other to close together to form an anti-bending base and clamp the edge of the substrate. An adhesive layer is provided on the inner side of the clamping part to enhance the fixation. When the protective structure is installed on the first side of the module area, the anti-bending base extends along the first extension direction of the substrate to restrict the module area from bending along the first protection direction. When the protective structure is installed on the second side of the module area, the anti-bending base extends along the second extension direction of the substrate to restrict the module area from bending along the second protection direction. The first extension direction and the second extension direction intersect each other, and the first protection direction and the second protection direction intersect each other.

2. The flexible circuit board with bending protection according to claim 1, characterized in that, The bending base ends of two adjacent protective structures are provided with mutually compatible fastening structures. The fastening structure includes a fastening protrusion and a fastening groove. The fastening protrusion and the fastening groove can be separably fastened together so that adjacent protective structures can be spliced ​​together.

3. The flexible circuit board with bending protection according to claim 1, characterized in that, The adhesive layer is a magnetic adsorption layer, and the magnetic adsorption layer is made of permanent magnet material.

4. The flexible circuit board with bending protection according to claim 1, characterized in that, The adhesive layer is made of a reusable adhesive material, and the surface of the adhesive layer is covered with a peelable release film.

Images