A continuously foldable flexible wiring board

Abstract

The utility model provides a kind of S type continuous foldable flexible circuit board, it is characterized by: flexible circuit board has two or more bending sections, adjacent bending sections are connected with connecting section, adjacent bending sections are located in the same side of connecting section, and gap is present between adjacent bending sections;After relatively bending, adjacent bending sections overlap each other, and flexible circuit board has gold finger at both ends.The utility model reduces volume under the condition that the length of circuit is unchanged, and meets the installation requirement of circuit board.

Description

Technical Field

[0001] This utility model relates to the structure of a flexible circuit board, specifically an S-shaped flexible circuit board that can be continuously folded. Background Technology

[0002] Some electronic products require circuit boards with a certain length of lines to be designed according to circuit requirements. However, due to size limitations, the circuit boards need to be installed in a limited space, which obviously creates a contradiction. Utility Model Content

[0003] This invention provides an S-shaped, continuously foldable flexible circuit board, the purpose of which is to overcome the shortcomings of the prior art, reduce the volume while keeping the circuit length unchanged, and meet the installation requirements of the circuit board.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An S-shaped, continuously foldable flexible circuit board, characterized in that:

[0006] The flexible circuit board has two or more curved sections, adjacent curved sections are connected by connecting sections, adjacent curved sections are located on the same side of the connecting sections, and there is a gap between adjacent curved sections; adjacent curved sections overlap each other after being bent relative to each other, and the flexible circuit board has gold fingers at both ends.

[0007] Adjacent curved sections are parallel to each other.

[0008] A tear-resistant hole is provided at the intersection of the gap and the connecting section, and the diameter of the tear-resistant hole is larger than the width of the gap.

[0009] The tear-resistant hole is a round hole.

[0010] Adjacent curved sections have the same width.

[0011] The advantages of this utility model are:

[0012] Based on the needs of circuitry and appearance, this utility model, under certain line length conditions, achieves a continuously foldable flexible circuit board through an S-shaped design, while keeping the length and width of the flexible circuit board unchanged. This reduces the volume and allows electronic products to meet the needs of circuitry or other functions within limited space, thus bringing broad application space to the design of electronic products. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a plan view of a flexible printed circuit board.

[0015] Figure 2This is a plan view of a flexible circuit board after one fold.

[0016] Figure 3 This is a two-dimensional planar diagram of a flexible circuit board folded. Detailed Implementation

[0017] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description 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 embodiments can be obtained based on these drawings without creative effort. To facilitate understanding of this utility model, a more detailed description of this utility model will be provided below in conjunction with the accompanying drawings and specific embodiments.

[0018] It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] like Figure 1 As shown:

[0020] According to the needs of circuit and product structure, there are three bending sections on the flexible circuit board: bending section 1, bending section 2, and bending section 3. Each bending section is equipped with an internal circuit layer.

[0021] The flexible circuit board has gold fingers 7 and 8 at both ends for external connection.

[0022] Bending segment 1 and bending segment 2 are adjacent, and the front end of bending segment 1 and the rear end of bending segment 2 are connected by connecting segment 12. Bending segment 1 and bending segment 2 are located on the same side of connecting segment 12, and there is a gap 5 between bending segment 1 and bending segment 2. A circular anti-tear hole 4 is provided at the intersection of gap 5 and connecting segment 12. The diameter of anti-tear hole 4 is larger than the width of gap 5. Bending segment 1 and bending segment 2 are parallel, that is, the flexible circuit board extends along bending segment 2, passes through connecting segment 12, and then extends along bending segment 1 in the opposite direction to bending segment 2, thereby forming a bending structure. The outer side 121 of connecting segment 12 can be selected as an arc or a straight line according to different product requirements.

[0023] Bending segment 1 and bending segment 3 are adjacent, and the rear end of bending segment 1 is connected to the front end of bending segment 2 by connecting segment 13. Bending segment 1 and bending segment 3 are located on the same side of connecting segment 13, and there is a gap 9 between bending segment 1 and bending segment 3. A circular anti-tear hole 10 is provided at the intersection of gap 9 and connecting segment 13, and the diameter of anti-tear hole 10 is larger than the width of gap 9. Bending segment 1 and bending segment 3 are parallel, that is, the flexible circuit board extends along bending segment 1, passes through connecting segment 13, and then extends along bending segment 3 in the opposite direction to bending segment 1, thereby forming a bending structure. The outer side 131 of connecting segment 13 can be selected as an arc or a straight line according to different product requirements.

[0024] The widths of curved sections 1, 2, and 3 are the same.

[0025] The continuously bent flexible circuit board is S-shaped.

[0026] like Figure 2 As shown

[0027] If the product structure allows, bend segment 3 relative to bend segment 1, i.e., bend once, so that bend segment 3 and bend segment 1 overlap, resulting in... Figure 2 The single-sided bending plane 1+3', due to the presence of gap 9 and anti-tear hole 10, allows bending to be achieved without damaging the flexible circuit board.

[0028] At this point, the gold finger 7 is mirrored and flipped, while the curved section 2 and the gold finger 8 remain in their original positions. The width of the middle part after folding is the sum of the width of the curved section 1, the width of the curved section 2, and the width of the gap 5.

[0029] like Figure 3 As shown

[0030] If the middle section needs to be narrower, the curved section 2 can be bent relatively to... Figure 2 The single-sided bending plane 1+3', that is, bending twice, with the bending segment 2 and the single-sided bending plane 1+3' overlapping each other, yields... Figure 3 The two bent planes 1+2'+3' are bent on both sides. Due to the presence of gap 5 and anti-tear hole 4, bending can be achieved without damaging the flexible circuit board.

[0031] At this point, the Goldfinger 7 is mirrored and flipped, and the width of the folded middle section is the same as the width of the curved section 1.

[0032] This invention provides an S-shaped, continuously foldable flexible circuit board, aiming to overcome the shortcomings of existing technologies. Based on circuit and appearance requirements, a certain circuit length is designed. Under the constraints of the electronic product casing, through an S-shaped design, while maintaining the same length and width at both ends of the flexible circuit board, multiple S-shaped bending segments are designed in a certain section of the middle segment. Each bending segment has a certain gap, and at each connecting bend of the gap, there is a circular anti-tear hole with a diameter larger than the gap width. The gap and anti-tear hole can be designed according to the number of S-shaped segments, with the gap width and the anti-tear hole diameter designed primarily to facilitate folding and allow for folding in different directions as needed.

[0033] Depending on the circuit and structural requirements, multiple S-shaped flexible circuit boards can be designed to be connected and folded. Under the condition of limited total length, the longer the circuit, the more S-shaped boards there are, the more consecutive folds can be made, and the higher the thickness of the stacked layers after folding, while the width remains unchanged.

[0034] Depending on the circuit requirements, components can be designed on each side, especially the outermost two sides. After the components are installed, the circuit can be folded. If a component needs to be mounted on a certain section, the spacing between adjacent components can be increased to a size larger than the height of the component, so that there is sufficient space after folding. If the width of the electronic product's casing or overall structure allows, or if it is a thin product, this structure can be used without folding for the same circuit length, achieving the same goal of reducing volume (reducing length).

[0035] Whether folded or not, components can be designed and installed in the S-shaped section, and can be connected to external circuits through the gold fingers at both ends. Due to the flexibility of the flexible circuit board, the gold fingers can be bent upwards or downwards for insertion.

[0036] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above description of the disclosed embodiments enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A continuously foldable flexible wiring board of S type, characterized by: The flexible circuit board has two or more curved sections, adjacent curved sections are connected by connecting sections, adjacent curved sections are located on the same side of the connecting sections, and there is a gap between adjacent curved sections; adjacent curved sections overlap each other after being bent relative to each other, and the flexible circuit board has gold fingers at both ends.

2. The S-shaped continuously foldable flexible circuit board of claim 1, wherein: Adjacent curved sections are parallel to each other.

3. The S-shaped continuously foldable flexible circuit board of claim 1, wherein: A tear-resistant hole is provided at the intersection of the gap and the connecting section, and the diameter of the tear-resistant hole is larger than the width of the gap.

4. The S-shaped continuously foldable flexible circuit board as described in claim 3, characterized in that: The tear-resistant hole is a round hole.

5. The S-shaped continuously foldable flexible circuit board as described in claim 1, characterized in that: Adjacent curved sections have the same width.

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