CN107148141A - Gold finger structure and flexible circuit board - Google Patents

Abstract

The gold finger structure disclosed by the present invention is used for a flexible circuit board, and the gold finger structure includes a gold finger body, a first covering film and a second covering film. The golden finger body includes a fixed end and a connecting end, the fixed end is connected with the flexible circuit board, and the connecting end is used for connecting with the components to be connected. The first covering film is arranged on a surface of the fixed end, and a side of the first covering film corresponding to the fixed end forms a first curve. The second covering film is arranged on the surface of the fixed end opposite to the first covering film, and a side of the second covering film corresponding to the fixed end forms a second curve. The edge corresponding to the fixed end of the first covering film is curved, which reduces the stress generated by the gold finger structure on the edge corresponding to the first covering film and the fixed end, and the edge corresponding to the second covering film and the fixed end is also curved, reducing The stress generated by the gold finger structure on the edge corresponding to the fixed end of the second covering film is reduced, thereby improving the strength of the gold finger structure. The invention also discloses a flexible circuit board.

Description

Gold finger structure and flexible circuit board

technical field

The invention relates to the technical field of circuit boards, in particular to a golden finger structure and a flexible circuit board.

Background technique

The existing gold finger structure is easily broken when it is transported or used for connecting other electronic components, which leads to poor electrical properties of the gold finger structure.

Contents of the invention

Embodiments of the present invention provide a golden finger structure and a flexible circuit board.

The gold finger structure according to the embodiment of the present invention is used for a flexible circuit board, and the gold finger structure includes:

Gold finger body, the gold finger body includes a fixed end and a connecting end, the fixed end is connected to the flexible circuit board, and the connecting end is used to connect to the element to be connected;

a first covering film, the first covering film is disposed on a surface of the fixed end, and a side of the first covering film corresponding to the fixed end forms a first curve; and

A second covering film, the second covering film is arranged on the surface of the fixed end opposite to the first covering film, and the side of the second covering film corresponding to the fixed end forms a second curve .

In some embodiments, the first curve includes peaks and troughs, the second curve includes peaks and troughs, and in the projection toward the body of the gold finger, the peaks of the first curve and the second The crests of the curves are staggered, and the troughs of the first curve and the troughs of the second curve are staggered. In the present invention, when the side corresponding to the fixed end of the first covering film is in the first curve, the stress generated by the gold finger structure on the edge corresponding to the first covering film and the fixed end is reduced; the second covering film and the fixed end The corresponding edge is also curved, which reduces the stress generated by the gold finger structure on the edge corresponding to the fixed end of the second covering film, thereby improving the strength of the gold finger structure.

In some embodiments, the orthographic projection of the first covering film on the golden finger body completely covers the orthographic projection of the second covering film on the golden finger body; or

The orthographic projection of the second covering film on the golden finger body completely covers the orthographic projection of the first covering film on the golden finger body; or

The orthographic projection of the side of the first covering film corresponding to the fixed end on the golden finger body, and the orthographic projection of the side of the second covering film corresponding to the fixed end on the golden finger body intersect; or

The peak interval of the first curve is opposite to the valley interval of the second curve, and the valley interval of the first curve is opposite to the peak interval of the second curve. This can further reduce the stress generated by the gold finger structure on the edge corresponding to the fixed end of the first cover film, and further reduce the stress generated by the gold finger structure on the edge corresponding to the fixed end of the second cover film, thereby avoiding the It is easy to break along the edge corresponding to the fixed end along the first curve, or/and break off along the edge corresponding to the fixed end along the second curve.

In some embodiments, the gold finger body includes a substrate and a plurality of fingers, the plurality of fingers are arranged on two opposite sides of the substrate, and the plurality of fingers located on the same side of the substrate Fingers are set apart from each other. Since the plurality of fingers located on the same side of the base material are arranged at intervals, the circuit short circuit caused by the fingers being connected together is avoided.

In some embodiments, each of the fingers is provided with a conduction hole at the connecting end, and the positions of the conduction holes of two adjacent fingers on the same side of the substrate are different. . The positions of the conduction holes of two adjacent fingers are different, that is to say, the centers of the plurality of conduction holes are not on the same straight line. Since the strength of the finger at the place where the conduction hole is opened is smaller than that at other positions of the finger, Therefore, the gold finger structure can be prevented from being broken along the central connection line of the plurality of via holes.

In some embodiments, a semicircular hole is formed at the end of each of the fingers at the connecting end. The opening is a semicircular hole, and when the finger is welded to the component to be connected, welding material (for example, solder) can diffuse into the opening, so that the finger and the component to be connected can be better connected.

In some embodiments, the finger includes at least one of copper foil, gold foil, or gold-plated copper foil. This can make the fingers have better conductivity and corrosion resistance.

In some embodiments, the first cover film includes a first reinforcement part extending from both ends of the first curve along the direction from the fixed end to the connection end, and the first reinforcement part is located at the the edges on both sides of the golden finger body; or/and

The second cover film includes a second reinforcement part extending from both ends of the second curve along the direction from the fixed end to the connection end, and the second reinforcement part is located on both sides of the golden finger body edge. When the gold finger structure is bent under the action of force, the first reinforcement part and the second reinforcement part can absorb part of the bending force, thereby enhancing the strength of the gold finger structure.

In some embodiments, the width of the first reinforcement part and/or the second reinforcement part is greater than or equal to 0.2 mm. If the width of the first reinforcement part is less than 0.2 mm, the bending force that the first reinforcement part can absorb is relatively small, and the strength of the gold finger structure cannot be further enhanced.

In some embodiments, the length of the connecting end is 0.1mm-3mm. Because if the length of the connecting end is too short, it will not be conducive to the connection between the gold finger structure and the components to be connected, and if the connecting end is too long, it will easily generate a large bending moment and cause the gold finger structure to break, so the length of the connecting end is 0.1mm-3mm is suitable.

In some embodiments, the first curve is a wavy line, and the wave period is 0.5mm-20mm; or/and

The second curve is a wave line, and the wave period is 0.5mm-20mm. Since the period of the wavy line is too small (that is to say, the number of peaks and troughs is too large), on the one hand, the wavy line can be regarded as close to a straight line, so it cannot reduce the stress; on the other hand, the manufacturing wave period is small The wavy lines are more difficult and costly. When the period of the wavy line is too large, the first curve (or the second curve) only forms an arc on the gold finger structure, and the gold finger structure is easily torn along the first curve (or the second curve).

The flexible circuit board of the embodiment of the present invention includes:

substrate; and

In the gold finger structure described in any one of the above-mentioned embodiments, the gold finger structure is connected to the body.

In the flexible circuit board and golden finger structure according to the embodiment of the present invention, a first covering film and a second covering film are respectively arranged on both sides of the golden finger body, and the edge corresponding to the first covering film and the fixed end is curved, which reduces the number of golden fingers. The stress generated by the structure on the edge corresponding to the fixed end of the first cover film, and the edge corresponding to the fixed end of the second cover film is also curved, which reduces the stress generated by the golden finger structure on the edge corresponding to the second cover film and the fixed end , thereby enhancing the strength of the gold finger structure.

Additional aspects and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic plan view of a golden finger structure in some embodiments of the present invention;

2 is a cross-sectional view of a gold finger structure in some embodiments of the present invention;

3 is a schematic plan view of a gold finger structure in some embodiments of the present invention;

4 is a schematic plan view of a gold finger structure in some embodiments of the present invention;

5 is a schematic plan view of a gold finger structure in some embodiments of the present invention;

6 is a cross-sectional view of a gold finger structure in some embodiments of the present invention; and

Fig. 7 is a schematic plan view of a gold finger structure in some embodiments of the present invention.

Description of main component symbols:

Gold finger structure 100, gold finger body 10, fixed end 11, connecting end 12, base body 13, finger 14, via hole 142, end portion 144, first covering film 20, first curve 22, first reinforcing part 24, The second covering film 30 , the second curved line 32 , and the second reinforcing part 34 .

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Please refer to FIG. 1 , a gold finger structure 100 according to an embodiment of the present invention is used in a flexible circuit board (not shown), and the gold finger structure 100 includes a gold finger body 10 , a first cover film 20 and a second cover film 30 . The golden finger body 10 includes a fixed end 11 and a connecting end 12. The fixed end 11 is connected to the substrate (not shown) of the flexible circuit board, and the connecting end 12 is used to connect to the component to be connected (not shown). The first cover film 20 is disposed on a surface of the fixed end 11 , and a side of the first cover film 20 corresponding to the fixed end 11 forms a first curve 22 . The second cover film 30 is disposed on a surface of the fixed end 11 opposite to the first cover film 20 , and a side of the second cover film 30 corresponding to the fixed end 11 forms a second curve 32 .

1-3, when the side of the first cover film 20 corresponding to the fixed end 11 is a straight line, and the side of the second cover film 30 corresponding to the fixed end 11 is also a straight line, if the gold finger structure 100 is under the action of force Bending occurs at the bottom, the bending force is concentrated on the edge corresponding to the fixed end 11 of the first cover film 20, and the bending force is also concentrated on the edge corresponding to the fixed end 11 of the second cover film 30, that is to say, the gold finger structure 100, stress concentration will occur at the edge corresponding to the fixed end 11 of the first covering film 20, and stress concentration will also occur at the edge corresponding to the fixed end 11 of the second covering film 30. At this time, the golden finger structure 100 is easy to When the edge of the first cover film 20 corresponding to the fixed end 11 is broken, it is also easy to break along the edge of the second cover film 30 corresponding to the fixed end 11 .

When the side of the first covering film 20 corresponding to the fixed end 11 is a curved line, if the gold finger structure 100 is bent along the edge corresponding to the first covering film 20 and the fixed end 11 under the action of force, the trough of the first curve 22 The bending force at the peak of the first curve 22 will diffuse (or transmit) along the trough to the first cover film 20, and the bending force at the crest of the first curve 22 will diffuse (or transmit) along the crest to the connecting end 12 of the gold finger body 10 That is to say, the stress concentration generated by the gold finger structure 100 on the edge corresponding to the first cover film 20 and the fixed end 11 is significantly reduced. At this time, the gold finger structure 100 is not easy to Edges snap off. When the side of the second covering film 30 corresponding to the fixed end 11 is a curved line, if the gold finger structure 100 is bent along the edge corresponding to the second covering film 30 and the fixed end 11 under the action of force, the trough of the second curve 32 The bending force at the peak of the second curve 32 will diffuse (or transmit) along the trough to the second cover film 30, and the bending force at the crest of the second curve 32 will diffuse (or transmit) along the crest to the connecting end 12 of the gold finger body 10 That is to say, the stress concentration generated by the golden finger structure 100 on the edge corresponding to the fixed end 11 of the second cover film 30 is significantly reduced. At this time, the gold finger structure 100 is not easy to Edges snap off. It should be noted that the crests and troughs mentioned in this article are relative to the components to be connected (or the connection end 12), as shown in Figure 1, the position closest to the components to be connected (or the connection end 12) is the peak , the position farthest from the element to be connected (or the connection end 12) is the valley.

In the gold finger structure 100 according to the embodiment of the present invention, the first covering film 20 and the second covering film 30 are respectively arranged on both sides of the gold finger body 10, and the edge corresponding to the first covering film 20 and the fixed end 11 is curved, which reduces the The stress generated by the gold finger structure 100 on the edge corresponding to the fixed end 11 of the first cover film 20, and the edge corresponding to the fixed end 11 of the second cover film 30 is also curved, which reduces the pressure of the gold finger structure 100 on the second cover film 30. The stress generated by the edge corresponding to the fixed end 11 improves the strength of the golden finger structure 100 .

Referring to FIG. 1 , a gold finger structure 100 according to an embodiment of the present invention is used for a flexible circuit board. The gold finger structure 100 includes a gold finger body 10 , a first cover film 20 and a second cover film 30 .

The flexible circuit board in the embodiment of the present invention includes a substrate and a gold finger structure 100 connected to the substrate.

Please refer to Fig. 4, the gold finger body 10 includes a fixed end 11 and a connecting end 12, the fixed end 11 is connected to the substrate, and the connecting end 12 is used to connect with the components to be connected, the components to be connected may include input ports, output ports, LED light guides film etc. The length L1 of the connection end 12 can be 0.1mm-3mm, for example, the length L1 of the connection end 12 can be: 0.1mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2 Any one of mm, 2.4mm, 2.6mm, 2.8mm, 3mm. If the length of the connecting end 12 is too short, it will be unfavorable to connect the gold finger structure 100 with the components to be connected, and if the connecting end 12 is too long, a large bending moment may be generated and the gold finger structure 100 will be broken.

Referring to Fig. 4, Fig. 5 and Fig. 6, the gold finger body 10 includes a base material 13 and a plurality of fingers 14, and the plurality of fingers 14 are arranged on two opposite sides of the base material 13, and the two sides on both sides of the base material 13 The fingers 14 correspond one to one (positions, shapes and lengths correspond respectively), and multiple fingers 14 located on the same side of the substrate 13 are spaced apart from each other, so as to prevent the fingers 14 from being connected together to cause a short circuit. Each finger 14 is substantially in the shape of a rectangular sheet. Each finger 14 is provided with a conduction hole 142 at the connecting end 12, and the conduction holes 142 on the corresponding fingers 14 on both sides of the base material 13 correspond to and communicate with each other, that is to say, the conduction holes 142 sequentially penetrate through the base material 14. Finger 14 on one side of 13, substrate 13 and finger 14 on the other side of substrate 13. The via hole 142 may be circular, and the portion of the finger located at the via hole 142 is circular, and the diameter of the outer ring is larger than the width of the finger 14 . Each finger 14 has a connection opening at the end 144 of the connection end 12 . The connection opening can be semicircular, and the end 144 can be semicircular. The end 144 of each finger 14 at the connecting end 12 is substantially flush with the end of the substrate 13 at the connecting end 12 and connected together. The finger 14 includes at least one of copper foil, gold foil, or gold-plated copper foil, so that the finger 14 has better electrical conductivity and corrosion resistance. The material of the substrate 13 includes polyimide film (PolyimideFilm, PI).

Referring to Fig. 4, the first covering film 20 is arranged on one surface of the fixed end 11, specifically, the first covering film 20 covers one end of the finger 14 on the fixed end 11 side and exposes the finger 14 on the connecting end 12 side One end (that is, the end 144 ), the side of the first cover film 20 corresponding to the fixed end 11 forms a first curve 22 . The first curve 22 includes crests and troughs, the first curve 22 can be a wavy line, and the period of the wavy line is 0.5mm-20mm, for example, the period of the wavy line can be: 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm , any one of 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 5mm, 10mm, 15mm, 20mm, preferably, the period of the wavy line is 1.2mm.

5-7, the second covering film 30 is arranged on a surface opposite to the first covering film 20 on the fixed end 11, specifically, the second covering film 30 also covers the fingers on one side of the fixed end 11. 14 and exposes one end of the finger 14 (that is, the end 144 ) on the side of the connecting end 12 , and the side of the second cover film 30 corresponding to the fixed end 11 is in a second curve 32 . The second curve 32 includes crests and troughs, the second curve 32 can be a wavy line, the period of the wavy line is 0.5mm-20mm, for example, the period of the wavy line can be 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm, Any one of 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 5mm, 10mm, 15mm, 20mm, preferably, the period of the wavy line is 1.2mm.

Specifically, if the period of the wavy line is too small (that is, the number of crests and troughs is too large), the wavy line can be regarded as close to a straight line, and the effect of reducing stress cannot be achieved. If the period of the wavy line is too large, the first curve 22 (or the second curve 32) will only form an arc on the gold finger structure 100, and the gold finger structure 100 will be easily torn along the first curve 22 (or the second curve 32). . The period of the wavy line is affected by the tool used to manufacture (cut) the wavy line. Generally speaking, it is difficult and expensive to manufacture a wavy line with a small wave period. Since the gold finger structure 100 generally includes more than two fingers 14, preferably six fingers 14, and the width W1 of the gold finger structure 100 is generally between 5 mm and 6 mm, when the period of the wavy line is 1.2 mm, the gold finger The structure 100 has at least two crests and troughs so that the strength of the gold finger structure 100 can be increased, and the number of crests and troughs will not be too many, which will not increase the processing difficulty.

1-3, when the side of the first cover film 20 corresponding to the fixed end 11 is a straight line, and the side of the second cover film 30 corresponding to the fixed end 11 is also a straight line, if the gold finger structure 100 is under the action of force Bending occurs at the bottom, the bending force is concentrated on the edge corresponding to the fixed end 11 of the first cover film 20, and the bending force is also concentrated on the edge corresponding to the fixed end 11 of the second cover film 30, that is to say, the gold finger structure 100, stress concentration will occur at the edge corresponding to the fixed end 11 of the first covering film 20, and stress concentration will also occur at the edge corresponding to the fixed end 11 of the second covering film 30. At this time, the golden finger structure 100 is easy to When the edge of the first cover film 20 corresponding to the fixed end 11 is broken, it is also easy to break along the edge of the second cover film 30 corresponding to the fixed end 11 .

When the side of the first covering film 20 corresponding to the fixed end 11 is a curved line, if the gold finger structure 100 is bent along the edge corresponding to the first covering film 20 and the fixed end 11 under the action of force, the trough of the first curve 22 The bending force at the peak of the first curve 22 will diffuse (or transmit) along the trough to the first cover film 20, and the bending force at the crest of the first curve 22 will diffuse (or transmit) along the crest to the connecting end 12 of the gold finger body 10 That is to say, the stress concentration generated by the gold finger structure 100 on the edge corresponding to the first cover film 20 and the fixed end 11 is significantly reduced. At this time, the gold finger structure 100 is not easy to Edges snap off. When the side of the second covering film 30 corresponding to the fixed end 11 is a curved line, if the gold finger structure 100 is bent along the edge corresponding to the second covering film 30 and the fixed end 11 under the action of force, the trough of the second curve 32 The bending force at the peak of the second curve 32 will diffuse (or transmit) along the trough to the second cover film 30, and the bending force at the crest of the second curve 32 will diffuse (or transmit) along the crest to the connecting end 12 of the gold finger body 10 That is to say, the stress concentration generated by the golden finger structure 100 on the edge corresponding to the fixed end 11 of the second cover film 30 is significantly reduced. At this time, the gold finger structure 100 is not easy to Edges snap off.

In the gold finger structure 100 according to the embodiment of the present invention, the first covering film 20 and the second covering film 30 are respectively arranged on both sides of the gold finger body 10, and the edge corresponding to the first covering film 20 and the fixed end 11 is curved, which reduces the The stress generated by the gold finger structure 100 on the edge corresponding to the fixed end 11 of the first cover film 20, and the edge corresponding to the fixed end 11 of the second cover film 30 is also curved, which reduces the pressure of the gold finger structure 100 on the second cover film 30. The stress generated by the edge corresponding to the fixed end 11 improves the strength of the golden finger structure 100 .

The gold finger structure 100 of the embodiment of the present invention also has the following beneficial effects: first, when the finger 14 is connected to the component to be connected, the soldering material (for example, solder) on the finger 14 can flow into the via hole 142 to make the soldering material and the finger 14 has a larger contact area, so that the connection effect of the fingers 14 is better. Simultaneously, the conduction hole 142 is circular, and the finger part at the conduction hole 142 is annular and the diameter of the outer ring is greater than the width of the finger 14, thereby reducing the stress generated by the finger 14 at the conduction hole 142, thereby improving Finger 14 Strength.

Second, the end 144 of the finger 14 is provided with an opening, and the opening is a semicircular hole. When the finger 14 is welded with the component to be connected, the welding material (for example, solder) can diffuse into the opening, so that the finger 14 and the component to be connected can be connected. Connect better.

In some embodiments, the positions of the via holes 142 of two adjacent fingers 14 on the same side of the base material 13 in the above embodiment are different, that is, the centers of the two adjacent via holes 142 to The distance D1 of the ends 144 is different. The positions of the conducting holes 142 of two adjacent fingers 14 are different, that is to say, the centers of a plurality of conducting holes 142 are not on the same straight line. The strength at other positions can prevent the golden finger structure 100 from being broken along the central connection line of the plurality of via holes 142 .

In other embodiments, in the projection toward the golden finger body 10, the peaks of the first curve 22 and the peaks of the second curve 32 in the above embodiment are staggered, and the troughs of the first curve 22 and the troughs of the second curve 32 are Staggering, so as to further reduce the stress generated by the golden finger structure 100 on the edge corresponding to the fixed end 11 of the first covering film 20, and further reduce the stress generated by the golden finger structure 100 on the edge corresponding to the fixed end 11 of the second covering film 30 stress, so as to prevent the gold finger structure 100 from easily breaking along the edge corresponding to the fixed end 11 of the first curve 22 , or/and breaking along the edge corresponding to the fixed end 11 along the second curve 32 . Specifically, the peak of the first curve 22 projected toward the gold finger body 10 may be completely opposite to the trough of the second curve 32 projected toward the gold finger body 10; or, the first curve 22 A part of the peak of the projection of the crest toward the golden finger body 10 corresponds to the peak of the projection of the trough of the second curve 32 toward the golden finger body 10, and the other part corresponds to the trough of the second curve 32 toward the crest of the projection of the golden finger body 10. The trough of the projection of the golden finger body 10 corresponds.

Please refer to Fig. 1 and Fig. 6, in some embodiments, in the projected plane toward the gold finger body 10, the peak of the first curve 22 and the peak of the second curve 32 in the above embodiment are staggered, the first curve 22 and the trough of the second curve 32 are staggered, and the orthographic projection of the second cover film 30 in the above embodiment on the gold finger body 10 completely covers the orthographic projection of the first cover film 20 on the gold finger body 10, so that Further reduce the stress generated by the gold finger structure 100 on the edge corresponding to the fixed end 11 of the first cover film 20, and further reduce the stress generated by the gold finger structure 100 on the edge corresponding to the fixed end 11 of the second cover film 30, and then Avoid breaking the golden finger structure 100 easily along the edge of the first curve 22 corresponding to the fixed end 11 , or/and along the edge of the second curve 32 corresponding to the fixed end 11 . Certainly, in other implementation manners, the orthographic projection of the first covering film 20 on the golden finger body 10 may completely cover the orthographic projection of the second covering film 30 on the golden finger body 10 .

In some embodiments, in the projection toward the gold finger body 10, the peak of the first curve 22 and the peak of the second curve 32 in the above embodiment are staggered, and the trough of the first curve 22 is different from the peak of the second curve 32. The troughs are staggered, and the orthographic projection of the side of the first cover film 20 in the above embodiment corresponding to the fixed end 11 on the gold finger body 10 is the same as the orthographic projection of the side of the second cover film 30 corresponding to the fixed end 11 on the gold finger body 10 Orthographic projections intersect, so as to further reduce the stress generated by the golden finger structure 100 on the edge corresponding to the first covering film 20 and the fixed end 11, and further reduce the stress of the golden finger structure 100 on the second covering film 30 corresponding to the fixed end 11. The stress generated by the edge can prevent the golden finger structure 100 from easily breaking along the edge corresponding to the fixed end 11 along the first curve 22 , or/and the edge corresponding to the fixed end 11 along the second curve 32 .

Please refer to FIG. 1 , in some embodiments, in the projection toward the gold finger body 10, the peak of the first curve 22 and the peak of the second curve 32 in the above embodiment are staggered, and the trough of the first curve 22 and the peak of the second curve 32 are staggered. The troughs of the second curve 32 are staggered, and the peaks of the first curve 22 in the above-mentioned embodiment are opposite to the troughs of the second curve 32, and the troughs of the first curve 22 are opposite to the peaks of the second curve 32, so that it can be further reduced The stress generated by the gold finger structure 100 on the edge corresponding to the fixed end 11 of the first covering film 20 and the stress generated on the edge corresponding to the fixed end 11 of the second covering film 30, thereby preventing the gold finger structure 100 from easily moving along the first The edge corresponding to the fixed end 11 of the curve 22 is broken off, or/and the edge corresponding to the fixed end 11 along the second curve 32 is broken off. Here, the relative interval means that the projection of the crest of the first curve 22 toward the golden finger body 10 and the projection of the trough of the second curve 32 toward the golden finger body 10 are opposite at intervals.

Please refer to FIG. 4 , in some embodiments, the first covering film 20 of the above embodiment includes a first reinforcing portion 24 extending from both ends of the first curve 22 along the direction from the fixed end 11 to the connecting end 12 , A reinforcing portion 24 is located on two side edges of the golden finger body 10 . When the gold finger structure 100 is bent under the action of force, the first reinforcement part 24 can absorb part of the bending force, thereby enhancing the strength of the gold finger structure 100 . In some embodiments, the width W2 of the first reinforcing portion 24 is greater than or equal to 0.2 mm. If the width W2 of the first reinforcement part 24 is less than 0.2 mm, the bending force that the first reinforcement part 24 can absorb is small, and the strength of the golden finger structure 100 cannot be further enhanced.

Please refer to FIG. 7 , in some embodiments, the second cover film 30 of the above embodiment includes a second reinforcing portion 34 extending from both ends of the second curve 32 along the direction from the fixed end 11 to the connecting end 12 , The two reinforcing parts 34 are located on two side edges of the golden finger body 10 . When the gold finger structure 100 is bent under the action of force, the second reinforcement part 34 can absorb part of the bending force, thereby enhancing the strength of the gold finger structure 100 . In some embodiments, the width W3 of the second reinforcement portion 34 is greater than or equal to 0.2 mm. If the width W3 of the second reinforcement part 34 is less than 0.2 mm, the bending force that the second reinforcement part 34 can absorb is relatively small, and the strength of the golden finger structure 100 cannot be further enhanced.

Please refer to FIG. 1 , in some embodiments, the first covering film 20 of the above embodiment includes a first reinforcing portion 24 extending from both ends of the first curve 22 along the direction from the fixed end 11 to the connecting end 12 , A reinforced part 24 is located on both sides of the gold finger body 10, and the second cover film 30 of the above embodiment includes a second reinforced part extending from both ends of the second curve 32 in the direction from the fixed end 11 to the connecting end 12 34 . The second reinforcing portion 34 is located on both side edges of the golden finger body 10 . When the gold finger structure 100 is bent under the action of force, both the first reinforcement part 24 and the second reinforcement part 34 can absorb part of the bending force, thereby further enhancing the strength of the gold finger structure 100 . In some embodiments, the width W2 of the first reinforcement part 24 is greater than or equal to 0.2 mm, and the width W3 of the second reinforcement part 34 is greater than or equal to 0.2 mm. If the width W2 of the first reinforcement part 24 and the width W3 of the second reinforcement part 34 are less than 0.2mm, the bending force that the first reinforcement part 24 and the second reinforcement part 34 can absorb will be small, and no further reinforcement will be achieved. The effect of the strength of the gold finger structure 100 .

Specifically, the embodiments of the present invention may only satisfy one of the above-mentioned embodiments or satisfy multiple of the above-mentioned embodiments at the same time, that is to say, an embodiment formed by combining one or more of the above-mentioned embodiments also belongs to the protection scope of the embodiments of the present invention. .

In the description of this specification, reference is made to the terms "certain embodiments," "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples," etc. The description means that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of said features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

Although the embodiment of the present invention has been shown and described above, it can be understood that the above embodiment is exemplary and should not be construed as a limitation of the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations, the scope of the present invention is defined by the claims and their equivalents.

Claims (12)

1. a kind of golden finger structure, for flexible PCB, it is characterised in that the golden finger structure includes：

Golden finger body, the golden finger body includes fixing end and connection end, and the fixing end connects with the flexible PCB Connect, the connection end is used to be connected with element to be connected；

First cover layer, first cover layer is arranged on a surface of the fixing end, first cover layer with it is described The corresponding one side of fixing end is in the first curve；With

Second cover layer, second cover layer is arranged on the surface opposite with first cover layer in the fixing end On, second cover layer one side corresponding with the fixing end is in the second curve.

2. golden finger structure according to claim 1, it is characterised in that first curve includes crest and trough, institute Stating the second curve includes crest and trough, in the projection towards the golden finger body, the crest of first curve and institute The crest for stating the second curve staggers, and the trough of the trough of first curve and second curve staggers.

3. golden finger structure according to claim 2, it is characterised in that first cover layer is in the golden finger body On orthographic projection orthographic projection of second cover layer on the golden finger body is completely covered；Or

First cover layer is completely covered in the golden hand in orthographic projection of second cover layer on the golden finger body Refer to the orthographic projection on body；Or

Orthographic projection of first cover layer one side corresponding with the fixing end on the golden finger body, and described second Orthographic projection of the cover layer one side corresponding with the fixing end on the golden finger body is intersected；Or

The crest of first curve is relative with the trough interval of second curve, the trough of first curve and described the The peak separation of two curves is relative.

4. golden finger structure according to claim 1, it is characterised in that the golden finger body includes base material and multiple hands Refer to, the multiple finger is arranged on opposite two sides of the base material, multiple hands on the base material same side Refer to spaced set.

5. golden finger structure according to claim 4, it is characterised in that each finger is opened up at the connection end There is via hole, the position of the via hole of adjacent two finger on the base material same side is different.

6. golden finger structure according to claim 4, it is characterised in that each end of the finger at the connection end Portion offers semi-circular hole.

7. golden finger structure according to claim 4, it is characterised in that the finger includes copper foil, goldleaf or copper foil table Face is at least one of gold-plated.

8. golden finger structure according to claim 1, it is characterised in that first cover layer includes bent from described first The two ends of line are located at institute along the first enhanced portion extended from the fixing end to the direction of the connection end, first enhanced portion State the both sides of the edge of golden finger body；Or/and

Second cover layer includes from the fixing end to the direction of the connection end prolonging from the two ends edge of second curve The second enhanced portion stretched, second enhanced portion is located at the both sides of the edge of the golden finger body.

9. golden finger structure according to claim 8, it is characterised in that first enhanced portion or/and second increasing The width in strong portion is more than or equal to 0.2mm.

10. golden finger structure according to claim 1, it is characterised in that the length of the connection end is 0.1mm-3mm.

11. golden finger structure according to claim 1, it is characterised in that first curve is wave, the wave Cycle is 0.5mm-20mm；Or/and

Second curve is wave, and the wave period is 0.5mm-20mm.

12. a kind of flexible PCB, it is characterised in that including：

Substrate；With

Golden finger structure described in claim 1-11 any one, the golden finger structure is connected with the body.