CN102044310B - Bundle flexible circuit cable - Google Patents

Abstract

The invention discloses a bunched flexible circuit flat cable, which comprises at least one cluster section in a flexible substrate, wherein one end of the cluster section is provided with at least one first connecting section, and the other end of the cluster section is provided with at least one second connecting section. Both the first connecting section and the second connecting section or one of the first connecting section and the second connecting section comprises a stacked structure. The flexible substrate can adopt a single-sided board or a double-sided board structure and can comprise an electromagnetic shielding layer. Selected locations of the cluster segments are bundled in a bundle structure into a bundle-like structure. The winding structure can be made of shielding material, insulating material or combined shielding and insulating material.

Description

Bundle flexible circuit cable

technical field

The invention relates to a structural design of a signal transmission cable, in particular to a bundled flexible circuit cable with a stackable structure.

Background technique

The traditional cable structure is generally a flat cable structure in which several wires covered with an insulating layer are arranged side by side, which can be used in many kinds of electrical equipment, electronic equipment, computer equipment and communication equipment for signal transmission. .

In recent years, the technology of flexible circuit boards has also been widely used in cable structures. In the flexible circuit board cable products that are commonly used at present, different flexible circuit board structures such as single-sided boards, double-sided boards, and multi-layer boards can be used to meet the needs of different numbers of transmission lines.

In practical applications, flat cables are used as signal transmission lines. Although it is not a big problem when passing through the narrow and long space, in many electronic equipment or communication equipment, it is often used. The shaft structure of the shaft hole. For example, in the structural design of notebook computers, liquid crystal displays, digital cameras, mobile phones, touch panels or many consumer electronics widely used at present, the cover or screen is often combined with the main body of the electronic device with a hinge structure. In order to transmit electrical signals from the main body of the electronic device to the cover or screen, the current practice is to use miniaturized cable products or cluster bundles of ultra-fine wires as signal transmission lines. In these application fields, if the traditional flat cable is used, many problems will be faced, such as the cable affects the smooth operation of the rotating shaft, the deflection of the wire is insufficient, and the durability of the wire flexure is insufficient. Therefore, the applicant of this case has previously developed a variety of flexible circuit cables with a bundle structure and a cluster section. The cluster section is a plurality of cluster lines cut along the extension direction of the flexible substrate. composed of.

Contents of the invention

Technical problem to be solved by the present invention

When using flexible circuit cables with bundled structures and cluster sections, although most of the requirements have been solved, there are still some problems. For example, when it is desired to combine flexible circuit cables with the shaft structure of electronic equipment , the connection slot or plug-in end at the end of the cable is not easy to pass through the narrow-caliber shaft hole. Furthermore, even after the connection socket or plug end of the flexible circuit cable passes through the narrow-diameter shaft hole, the cluster wires of the flexible circuit cable often have the problems of random bending and electromagnetic interference.

Therefore, in view of the deficiencies in the prior art, the main purpose of the present invention is to provide a bundled flexible circuit cable with a stackable structure, which can reduce the size of the end of the flexible circuit cable due to the foldable structure. Width size and ease of handling the end of the flexible circuit cable through the shaft hole. The bundled flexible circuit cable includes: a flexible substrate extending in an extending direction and having a first surface and a second surface; a first conductive layer formed on the first surface of the flexible substrate; at least one first The connection section is located at one end of the flexible substrate; at least one second connection section is located at the other end of the flexible substrate opposite to the first connection section; at least one cluster section is connected to the first connection section and the second connection section Between the connecting sections, the cluster section is composed of a plurality of cluster lines cut along the extension direction of the flexible substrate; at least one bundle structure is wrapped at a selected position of the cluster section to separate the cluster section Each cluster wire of the section is bundled into a bundle structure; wherein both the first connecting section and the second connecting section or one of the first connecting section and the second connecting section includes a stacked structure, and the stacked structure In order to fold the side wings or one of the side wings of the first connection section at a fold line, the side wings overlap at least a part of a central area of the first connection section.

Another object of the present invention is to provide a bundled flexible circuit cable with good shielding effect. With the folding and bundle structure of the present invention, an electromagnetic shielding layer can be provided on the flexible substrate of the flexible circuit cable. It is also possible to form a bundle structure with electromagnetic shielding materials. The bundled flexible circuit cable includes: a flexible substrate extending in an extending direction and having a first surface and a second surface; a first conductive layer formed on the first surface of the flexible substrate; at least one first The connection section is located at one end of the flexible substrate; at least one second connection section is located at the other end of the flexible substrate opposite to the first connection section; at least one cluster section is connected to the first connection section and Between the second connection sections, the cluster section is composed of a plurality of cluster lines cut along the extending direction of the flexible substrate; a first insulating layer is formed on the first conductive layer; an electromagnetic shielding layer is formed On the first insulating layer; where both the first connection section and the second connection section or one of the first connection section and the second connection section includes a stacked structure, the stacked structure is to connect the first connection The two side wings of the section or one of the two side wings are folded at a fold line so that the side wings overlap at least a part of a central area of the first connecting section.

Another object of the present invention is to provide a bundled flexible circuit cable, which includes: a flexible substrate extending in an extending direction and having a first surface and a second surface; a first The conductive layer is formed on the first surface of the flexible substrate; at least one first connection section is located at one end of the flexible substrate; at least one second connection section is located at the opposite side of the flexible substrate from the first connection section The other end; at least one cluster section, connected between the first connection section and the second connection section, the cluster section is composed of a plurality of cluster lines cut along the extending direction of the flexible substrate; a first An insulating layer, formed on the first conductive layer; an electromagnetic shielding layer, formed on the first insulating layer; the flexible circuit wiring further includes: at least one bundle structure, bundled at a selected position of the cluster section, Each cluster wire of the cluster section can be bundled into a bundle structure.

Technical means for solving problems of the present invention

The technical means adopted by the present invention to solve the problems of the known technology is to include at least one cluster section in a flexible substrate, and the cluster section is formed by cutting along the extending direction of the flexible substrate. composed of cluster lines. One end of the cluster section is formed with at least one first connection section, and the other end is formed with at least one second connection section. Both the first connection section and the second connection section or one of the first connection section and the second connection section include a superimposed structure, and the superposition structure is that the first connection section flanks or One of the two side wings is folded with a folding line, so that the side wing overlaps at least a part of a central area of the first connecting section.

In an embodiment of the present invention, the flexible substrate may adopt a single-sided or double-sided structure, and may include an electromagnetic shielding layer. Selected locations of the clustered sections are bundled into a bundled structure in a bundled structure. The bundle structure can be made of shielding material, insulating material or a combination of shielding and insulating materials.

Efficacy of the present invention over prior art

Through the structural design of the present invention, the signal transmission cable can be reduced in width at the end of the flexible circuit cable through the structural design of stacking and combination, and when combined with the operation of the rotating shaft structure, the flexible circuit can be easily integrated The end of the flexible circuit cable passes through the narrow-diameter shaft hole. The coiled structure wrapped around the cluster section of the flexible circuit cable can not only limit the flexure of each cluster wire in the cluster section of the flexible substrate, but also provide electromagnetic shielding for the cluster section.

Other purposes and effects of the present invention will be further illustrated by the following embodiments and accompanying drawings.

Description of drawings

Fig. 1 is a perspective view when the bundled flexible circuit cable of the present invention is unfolded;

Fig. 2 is the sectional view of section 2-2 in Fig. 1;

Fig. 3 is a cross-sectional view when the flexible circuit substrate in Fig. 1 is a double-sided circuit substrate;

Fig. 4 is a perspective view of bundled flexible circuit cables of the present invention after being stacked;

Fig. 5 is the sectional view of section 5-5 in Fig. 4;

Fig. 6 is a perspective view of the present invention with a connection slot seat configured in the first connection section and a connection slot seat in the second connection section;

Fig. 7 is a perspective view of the present invention that connects two corresponding connecting sections with one connecting section via a cluster line of two clustered sections;

FIG. 8 is a cross-sectional view of cluster wires wrapped in a cluster section of a flexible substrate in a roll structure according to the present invention;

Fig. 9 is an application example in which the present invention is combined in a mobile phone with a rotating shaft structure;

Fig. 10 is a cross-sectional view in which the outer ring of the electromagnetic shielding material layer of the bundle structure in Fig. 8 is covered with an insulating outer layer;

Figure 11 shows that the cluster section of the flexible substrate is first surrounded by an insulating inner layer, and then the outer ring of the insulating inner layer is surrounded by an electromagnetic shielding material layer, and finally an insulating outer ring is arranged on the outer ring of the electromagnetic shielding material layer. cutaway view of the layer;

FIG. 12 is a three-dimensional schematic diagram of the bundled flexible circuit cable of the present invention in a helical bundle structure where the bundles are positioned at a selected position of the cluster section.

Description of main component symbols:

100 Bundle flexible circuit cable

11 Flexible substrate

11a First surface

11b Second surface

12 The first conductive layer

13 The first insulating layer

14 Electromagnetic shielding layer

15 Second conductive layer

16 Second insulating layer

17 through hole

18 Conductive material

2, 2a The first connection section

20 superimposed structure

21 central area

211 Connection socket

212, 213 broken line

22, 23 Flank overlapping area

3 The second connection section

31 central area

311 Connection socket

32, 33 Flank overlapping area

321 Plug-in terminal

4, 4a cluster section

41, 41a cluster line

5 roll structure

5a Helical bundle structure

51 Electromagnetic shielding material layer

52 Insulation outer layer

53 Insulation inner layer

54 Insulation outer layer

6 Shaft structure

I Extension direction

II Beam direction

III Oblique to the bundle direction

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

Referring to FIG. 1 , it shows a perspective view of the unfolded bundled flexible circuit cable of the present invention, and FIG. 2 shows a cross-sectional view of section 2-2 in FIG. 1 . The bundled flexible circuit cable 100 of the present invention includes a flexible substrate 11 extending a predetermined length in an extending direction I. The flexible substrate 11 has a first surface 11a and a second surface 11b. On the first surface 11 a of the flexible substrate 11 , a first conductive layer 12 and a first insulating layer 13 are sequentially formed. In a preferred embodiment of the present invention, an electromagnetic shielding layer 14 is further formed on the first insulating layer 13 . The electromagnetic shielding layer 14 can be selectively partially covered on a selected area on the surface of the first insulating layer 13 to serve as an electromagnetic shielding function for electric signals.

The structure of the flexible circuit substrate shown in FIG. 2 is a single-sided circuit substrate, and the present invention can also be applied to a double-sided circuit substrate. In the structure of the double-sided circuit board (see Fig. 3), a second conductive layer 15 and a second insulating layer 16 are sequentially formed on the second surface 11b of the flexible substrate 11, and on the double-sided In the structure of the circuit substrate, a signal jumper structure can also be provided, that is, a through hole 17 is opened at a selected position between the first surface 11a and the second surface 11b of the flexible substrate 11, and in the through hole 17 Conductive material 18 is provided on the wall, so that the first conductive layer 12 and the second conductive layer 15 of the first surface 11 a and the second surface 11 b of the flexible substrate 11 can be selectively connected with signals. The structure of the double-sided circuit substrate can also be formed by combining two single-sided circuit substrates back to back.

In the extending direction I of the flexible substrate 11, it can be divided into a first connection section 2, a second connection section 3, and a cluster area between the first connection section 2 and the second connection section 3 Section 4 , that is, the first connection section 2 is located at one end of the cluster section 4 , and the second connection section 3 is located at the other end of the flexible substrate 11 opposite to the first connection section 2 .

The cluster section 4 is composed of a plurality of cluster wires 41 cut along the extending direction I of the flexible substrate 11 . And all or part of the cluster wires 41 can be provided with signal wires to serve as electrical signal transmission paths between the first connection section 2 and the second connection section 3 . In the cluster section 4, several anti-tear can be formed at appropriate positions at the ends of all or part of the cluster lines 414 formed by cutting (for example, in the first connecting section 2 and a second connecting section 3). The perforations 214 can prevent the flexible substrate 11 from being torn and damaged accidentally along the cluster lines 41 formed by cutting during assembly operation or use.

The first connection section 2 includes a stacked structure 20 . Referring to FIG. 4 and FIG. 5 at the same time, the stacking structure 20 is divided into a central area 21 and flank stacking areas 22 , 23 on both sides of the central area 21 . The overlapping regions 22, 23 of the two flanks or one of the flanks can be folded toward the central region 21 along the solid or imaginary folding lines 212, 213, so that the overlapping regions 22, 23 of the flanks are overlapped in the central region 21 or a part of the area superimposed on the central area 21 . In this way, the width of the first connecting section 2 in the direction perpendicular to the extending direction I of the flexible substrate 11 becomes smaller. The second connecting section 3 can also be provided with the same overlapping structure, so that the flank overlapping areas 32, 33 on both sides of the central area 31 of the second connecting section 3 are overlapped on the central area 31 or on the central area. 31 part of the area. The structure after the stacking is completed is shown in FIG. 4 .

In actual application, the first connection section 2 and the second connection section 3 may be provided with different types of connection sockets or plug ends at selected positions. For example, in the embodiment shown in FIG. 1 , a connection slot 211 is arranged in the central area 21 of the first connection section 2 , and a plug socket is provided on the side edge of the side wing overlapping area 32 of the second connection section 3 . Terminal 321. Of course, the same type of connection sockets or sockets can also be provided on the first connection section 2 and the second connection section 3 . For example, in the embodiment shown in FIG. 6 , a connecting groove seat 211 is arranged in the central area 21 of the first connecting section 2 , and a connecting groove seat is also provided in the overlapping area 31 of the flanks of the second connecting section 3 311.

Furthermore, the corresponding numbers of the connection section and the cluster section of the flexible substrate can be a one-to-one structure or a one-to-many structure design. For example, in the embodiment shown in FIG. 1, it is a structural design in which one connection section is connected to another connection section via a single cluster section, while in the embodiment shown in FIG. 7, it is a second connection section 3 A structural design in which a first connection section 2 is connected via a cluster line 41 of a cluster section 4 and another first connection section 2a is connected via a cluster line 41a of another cluster section 4a. In actual application, different changes and applications can be made according to different needs.

In the embodiment of the present invention, at least one winding structure 5 can be wound at a selected position of the cluster section 4 of the flexible substrate 11 (refer to FIG. 4 ), so that each cluster wire 41 of the cluster section 4 can be bundled. into a bunch-like structure. FIG. 8 shows a cross-sectional view of section 8-8 in FIG. 4 . In a preferred embodiment of the present invention, the bundle structure 5 has an electromagnetic shielding material layer 51, that is, the bundle structure 5 includes a bundle structure made of shielding material, and is bundled in the cluster area The selected position of the section 4, in addition to being able to bundle the cluster wires 41 of the cluster section 4 into a bundle structure, also provides electromagnetic shielding for the cluster section 4. The roll structure 5 can also be made of insulating material (such as waterproof tape) or a combination of shielding material and insulating material.

FIG. 9 shows an application example in which the present invention is practically combined in a mobile phone with a hinge structure. As shown in the figure, after the cluster lines 41 of the cluster section 4 of the flexible substrate 11 of the bundled flexible circuit cable 100 of the present invention pass through a rotating shaft structure 6, the first connecting section 2 and the second connecting section 3 They are located at two corresponding positions of the rotating shaft structure 6 respectively. By virtue of the electromagnetic shielding effect of the electromagnetic shielding material layer 51 of the bundle structure 5 , the cluster wires 41 of the cluster section 4 can avoid electromagnetic interference problems that may occur in passing paths when transmitting signals.

In actual application, an insulating outer layer 52 (as shown in FIG. 10 ) may also be coated on the outer ring of the electromagnetic shielding material layer 51, or an insulating outer layer 52 may be applied to the cluster section 4 of the flexible substrate 11 first. The inner layer 53 is surrounded, and the outer ring of the insulating inner layer 53 is surrounded by an electromagnetic shielding material layer 51 , and finally an insulating outer layer 54 is arranged around the outer ring of the electromagnetic shielding material layer 51 (as shown in FIG. 11 ).

The roll structure 5 of the foregoing embodiment is a roll structure type of a sheet, and the sheet is positioned at a selected position of the cluster section in a roll direction II. The bundle structure can also be formed in a helically wound structure. As shown in FIG. 12 , the shielding material which is an elongated sheet is helically wound on the cluster line 41 of the cluster section 4 in an oblique beam direction III to form a helical coil structure 5a, and the The strip-shaped shielding material can be selected from one of materials with electromagnetic shielding effect such as conductive cloth, silver foil, aluminum foil, copper foil, and metal sheet.

The above descriptions of the embodiments are only descriptions of preferred embodiments of the present invention, and those skilled in the art can make other various improvements and changes based on the descriptions of the above embodiments of the present invention. However, the various improvements and changes made according to the embodiments of the present invention should still belong to the inventive spirit of the present invention and the patent scope defined by the claims.

Claims (5)

1. A bundled flexible circuit cable, characterized in that the bundled flexible circuit cable includes: A flexible substrate, extending in an extension direction, has a first surface and a second surface; a first conductive layer is formed on the first surface of the flexible substrate, and a first conductive layer is also formed on the first conductive layer. an insulating layer and an electromagnetic shielding layer formed on the first insulating layer; At least one first connection section is located at one end of the flexible substrate; at least one second connection section, located at the other end of the flexible substrate opposite to the first connection section; At least one cluster section is connected between the first connection section and the second connection section, and the cluster section is cut by a plurality of strips along the extending direction of the flexible substrate Consisting of cluster lines formed; At least one bundle structure, bundled at a selected position of the cluster section, so as to bundle each cluster wire of the cluster section into a bundle structure; Wherein, both the first connection section and the second connection section or one of the first connection section and the second connection section include a stacked structure, and the stacked structure of the first connection section is Folding the side wings or one of the side wings of the first connection section with a fold line, so that the side wings are superimposed on at least a part of a central area of the first connection section, so The overlapping structure of the second connection section is to fold the two side wings of the second connection section or one of the two side wings at a fold line so that the side wings of the second connection section are superimposed on the at least a portion of a central region of the second connecting section; The bundle structure is that a sheet is positioned in a selected position of the cluster section in a bundle direction; Wherein, at least one anti-tear hole is formed at the folding line of the first connection section or the second connection section; The bundle structure includes: a layer of electromagnetic shielding material surrounding the cluster section; An insulating outer layer surrounds the outer ring of the electromagnetic shielding material layer. 2. The bundled flexible circuit cable according to claim 1, wherein the first connection section is a plug-in terminal or is provided with a connector. 3. The bundled flexible circuit cable according to claim 1, wherein the second connection section is a plug-in terminal or is provided with a connector. 4. The bundled flexible circuit cable according to claim 1, wherein the second surface of the flexible substrate is formed with: a second conductive layer; A second insulating layer formed under the second conductive layer. 5. The bundled flexible circuit cable according to claim 1, characterized in that, the sheet-shaped body is positioned in the cluster with a thin strip of sheet in an oblique winding direction The selected position of the section.

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