JP3229385U - Flexible flat cable structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible flat cable structure capable of stable characteristic impedance and transmission suitable for a high frequency signal. A flexible flat cable structure includes a conductor layer 12, a first composite material layer 14, a first insulating rubber layer 16, a second insulating rubber layer 18, and a reinforcing plate 20. After joining the conductor layer, the first composite material layer, the first insulating rubber layer and the second insulating rubber layer, the strips are cut into a plurality of strips, and each strip provides a plurality of leads and of the plurality of leads. The first end 1262 and the second end 1264 are exposed to the second insulating rubber layer. [Selection diagram] Fig. 1

Description

The present invention relates to the technical field of flat cables, and particularly to strip type flexible flat cable structures.

Conventionally, a flexible flat cable (Flexible Flat Cable, FFC) is a data cable formed by crimping a tin-plated flat copper wire of PET insulating material on a production line of an automated facility, and itself can bend freely. It is used to provide signal transmission because it has advantages such as being able to perform and having a high frequency signal transmission function.

Flexible flat cables have the property of being freely bendable, and can produce insulating layers of different thicknesses to meet different needs.

The present invention provides a flexible flat cable structure that provides stable characteristic impedance and transmission suitable for high frequency signals.

A primary object of the present invention is to provide a flexible flat cable structure, the flexible flat cable structure providing a plurality of strips, each strip containing a single or multiple lead wires for bending resistance and flexibility. To increase.

A second object of the present invention is to provide a multi-layer structure of a conductor layer, an insulating rubber layer, and a composite material layer by the flexible flat cable structure.

A third object of the present invention is to adjust the thickness of the composite material layer by the flexible flat cable structure in order to provide stable characteristic impedance and transmission suitable for high frequency signals.

A fourth object of the present invention is to install one or two composite material layers on the side surface of the conductor layer in order to reduce interference that shields electromagnetic signals by the flexible flat cable structure.

A fifth object of the present invention is to transmit an electronic signal by connecting a first connection head and a second connection head to a male plug or a female socket of a circuit board by the flexible flat cable structure.

A sixth object of the present invention is to connect the first connection head and the second connection head by the flexible flat cable structure to electrically connect the first connection head and the second connection head. A reinforcing plate is provided for enhancing stability.

A seventh object of the present invention is to form a ground opening in the composite material layer in order to connect the ground ends of the first connection head and the second connection head by the flexible flat cable structure.

The eighth object of the present invention is that the conductor layer has a main body and a joint portion due to the flexible flat cable structure, and the portion between the main body and the joint portion exhibits a tapered slope.

A ninth object of the present invention is that, due to the flexible flat cable structure, the cross-sectional shape of these lead wires at the joint portion is the same as or different from the cross-sectional shape of these lead wires in the main body.

A tenth object of the present invention is that, due to the flexible flat cable structure, the first end and the second end of the lead wire are simultaneously on the same side of the insulating rubber layer or on different sides in order to adapt to different circuit designs. It may be exposed to the insulating rubber layer.

In order to achieve the above object and other objects, the present invention provides a flexible flat provided with a conductor layer, a first composite material layer, a first insulating rubber layer, a second insulating rubber layer and a reinforcing plate. Provides a cable structure. The conductor layer has a first surface and a second surface. A first composite material layer is formed on the first surface of the conductor layer. The first composite material layer shields electromagnetic signals. A first insulating rubber layer is formed between the conductor layer and the first composite material layer. A second insulating rubber layer is formed on the side of the non-first insulating rubber layer of the conductor layer. A reinforcing plate is provided between the first insulating rubber layer and the first composite material layer, and a part of the reinforcing plate is exposed to the first composite material layer. Further, after joining the conductor layer, the first composite material layer, the first insulating rubber layer and the second insulating rubber layer, they are cut into a plurality of strips, and each strip provides a plurality of lead wires, and these leads are provided. The first end and the second end of the wire are simultaneously exposed to the first insulating rubber layer or the second insulating rubber layer, and these lead wires have the first end of the first insulating rubber layer. The second end is exposed to the second insulating rubber layer, or these lead wires are exposed to the second insulating rubber layer at the first end and the second end is the said. It is exposed to the first insulating rubber layer.

Compared with the prior art, the flexible flat cable structure of the present invention is a multi-layer structure for transmitting an electric signal / power supply, and is cut into a plurality of strips, and each strip provides a plurality of lead wires. In addition, a composite layer is provided on at least one surface of the conductor layer to shield the electromagnetic signal.

FIG. 1 is a diagram showing a cross section of a flexible flat cable structure according to a first embodiment of the present invention. FIG. 2 is a top view shown for explaining the flexible flat cable structure according to FIG. 3 of the present invention. FIG. 3 is a diagram showing a cross section of a flexible flat cable structure according to a second embodiment of the present invention. FIG. 4 is a top view shown for explaining the flexible flat cable structure according to FIG. 3 of the present invention.

In order to fully understand the purpose, features and effects of the present invention, the present invention will be described based on the examples and drawings described later.

In the present invention, the units and devices described in the present specification will be described using "one". Unless otherwise noted, such description is understood to include one, at least one, and the singular also includes the plurality at the same time.

In the present invention, the terms "include", "provide", "have" or other similar terms are intended to cover non-exclusive ones. For example, a device, structure, product or device that includes multiple elements is not limited to the requirements described herein and is not explicitly stated, but is another unique device, structure, product or product. , Or the device can be included. Other than this, the term "or" means inclusive "or" and does not mean exclusive "or" unless there is a clear and opposite explanation.

With reference to FIG. 1, FIG. 1 is a diagram showing a cross section of a flexible flat cable structure according to a first embodiment of the present invention. In FIG. 1, the flexible flat cable structure 10 includes a conductor layer 12, a first composite material layer 14, a first insulating rubber layer 16, a second insulating rubber layer 18, and a reinforcing plate 20.

The conductor layer 12 has a first surface 122 and a second surface 124. Here, the first surface 122 points downward, and the second surface 124 points upward. The conductor layer 12 is composed of a plurality of lead wires 126, and the top view of FIG. 2 may be referred to together. There is a gap d between these lead wires 126. Here, the number of lead wires 126 will be described by taking five as an example, but in other embodiments, the number can be adjusted according to actual needs.

The conductor layer 12 further includes a main body 128 and a connecting portion 1210. The main body 128 is connected to the connecting portion 1210 with reference to the enlarged view. The portion between the main body 128 and the coupling portion 1210 is inclined for application to the connection head described later. The cross-sectional shape of the lead wire 126 of the connecting portion 1210 is the same as or different from the cross-sectional shape of the lead wire 126 in the main body 128. Here, the cross-sectional shape of the lead wire 126 on the main body 128 is circular, and the cross-sectional shape of the lead wire 126 on the joint portion 1210 is sheet-like. In another embodiment, the cross-sectional shape of the lead wire 126 on the main body 128 may be a square, a triangle, a rectangle, a polygon, or the like.

Returning to FIG. 1, the first composite material layer 14 is formed on the first surface 122 of the conductor layer 12, for example, the material of the first composite material layer 14 is a metal material, a ceramic material, a polymer material, or the like. Two or more materials are substrates produced by a composite process. Since the first composite material layer 14 contains a metallic material, it can resist electromagnetic signals. The first composite material layer 14 is laminated on the conductor layer 12, and the length of the first composite material layer 14 is shorter than the length of the conductor layer 12.

The first insulating rubber layer 16 is formed between the conductor layer 12 and the first composite material layer 14 to bond the conductor layer 12 and the first composite material layer 14. For example, the bonding method is bonding, bonding, bonding, or the like. The material of the first insulating rubber layer 16, in addition to binding the first composite material layer 14 and the conductor layer 12, causes electrical signals between these lead wires 126 to come into contact with each other and cause malfunction. It can also be prevented.

The second insulating rubber layer 18 is formed on the side of the non-first insulating rubber layer 16 of the conductor layer 12 to prevent electrical signals between these lead wires 126 from coming into contact with each other and causing malfunction.

The reinforcing plate 20 is provided between the first insulating rubber layer 16 and the first composite material layer 14, and a part of the reinforcing plate 20 is exposed to the first composite material layer 14. The reinforcing plate 20 can increase the thickness of the end of the conductor layer 12, and the reinforcing plate 20 can be connected to the electrical connection head to lock the lead wire 126 to the electrical connection head.

As shown in FIG. 2, after joining the first composite material layer 14, the first insulating rubber layer 16 and the second insulating rubber layer 18, the strips are cut into a plurality of strips, and each strip has one or more leads. Line 126 is provided. The first end 1262 and the second end 1264 of these lead wires 126 are exposed to the second insulating rubber layer 18. In this embodiment, these leads 126 are on the same side, i.e., in addition to being simultaneously exposed to the second insulating rubber layer 18, in another embodiment, the first end of these leads 126. The 1262 and the second terminal 1264 may be exposed to the first insulating rubber layer 16 and the second insulating rubber layer 18, respectively. For example, the first end 1262 of these lead wires 126 is exposed to the first insulating rubber layer 16, and the second end 1264 is exposed to the second insulating rubber layer 18.

With reference to FIG. 3, FIG. 3 is a diagram showing a cross section of a flexible flat cable structure according to a second embodiment of the present invention. In FIG. 3, the flexible flat cable structure 10'has a conductor layer 12, a first composite material layer 14, a first insulating rubber layer 16, a second insulating rubber layer 18, and a second insulating rubber layer 18 according to the first embodiment. In addition to providing the reinforcing plate 20, it further includes a first connecting head 22, a second connecting head 24, and a second composite material layer 26.

With reference to FIG. 4, FIG. 4 is a top view for explaining the flexible flat cable structure according to FIG. 3 of the present invention. The first connection head 22 is a male plug or a female socket, and here, the first connection head 22 will be described by taking a male plug as an example. The first connection head 22 provides a plurality of terminals for connecting the first end 1262 of these lead wires 126. Further, the first connection head 22 provides a ground terminal for connecting the ground end of the circuit board. In another embodiment, the first connection head 22 may directly provide the first end 1262 of these leads 126.

The second connection head 24 may be a male plug or a female socket. Here, the second connection head 24 will be described by taking a male plug as an example. The second connection head 24 provides a plurality of terminals for connecting the second end 1264 of these lead wires 126. The second connection head 24 also provides a ground terminal for connecting the ground end of the circuit board. In another embodiment, the second connection head 24 may directly provide the second end 1264 of these leads 126.

The second composite material layer 26 is formed on the second surface of the conductor layer 12. The second composite material layer 26 can shield the electromagnetic signal. In another embodiment, the second composite material layer 26 is further formed with a grounding opening 262, and the grounding opening 262 is formed on both sides of the second composite material layer 26, respectively. The grounding opening 262 can connect the grounding terminal of the first connection head 22 and the grounding terminal of the second connection head 24. In another embodiment, the aluminum foil piece 264 provided in the grounding opening 262 is further included, and the grounding opening 262 connects the grounding terminal of the first connection head 22 and the grounding terminal of the second connection head 24.

Although the embodiments of the present invention have been described, the examples are presented as examples and are not intended to limit the scope of the invention. The examples can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. Examples and variations thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

10, 10'... Flexible flat cable structure 12 ... Conductor layer 122 ... First surface 124 ... Second surface 126 ... Lead wire 1262 ... First end 1264 ... Second end 128 ... Main body 1210 ... Bond 14 ... 1st composite material layer 16 ... 1st insulating rubber layer 18 ... 2nd insulating rubber layer 20 ... Reinforcing plate 22 ... 1st connecting head 24 ... 2nd connecting head 26 ... 2nd composite material layer 264 ... Aluminum foil piece d ... Gap

Claims (10)

A conductor layer having a first surface and a second surface,
A first composite material layer formed on the first surface of the conductor layer and shielding an electromagnetic signal,
A first insulating rubber layer formed between the conductor layer and the first composite material layer,
A second insulating rubber layer formed on the side of the non-first insulating rubber layer of the conductor layer,
A reinforcing plate provided between the first insulating rubber layer and the first composite material layer and partially exposed to the first composite material layer.
With
After joining the conductor layer, the first composite material layer, the first insulating rubber layer and the second insulating rubber layer, the strips are cut into a plurality of strips, and each strip provides a plurality of lead wires. The first end and the second end of the plurality of lead wires are simultaneously exposed to the first insulating rubber layer or the second insulating rubber layer, or the first end and the second end of the plurality of lead wires are exposed. A flexible flat cable structure characterized in that the ends of the two are exposed to the first insulating rubber layer and the second insulating rubber layer, respectively. The flexible flat cable structure according to claim 1, further comprising a second composite material layer formed on the second surface of the conductor layer and shielding the electromagnetic signal. A ground opening is formed in the second composite material layer.
The flexible flat cable structure according to claim 2, wherein the ground openings are formed on both sides of the second composite material layer, respectively. The flexible flat cable structure according to claim 3, further comprising an aluminum foil piece provided in the ground opening. Further including a first connection head and a second connection head,
The first connection head is connected to the first end and the second end of the plurality of lead wires.
The flexible flat cable structure according to claim 3 or 4, wherein the ground end of the first connection head and the ground end of the second connection head are respectively coupled to the ground opening. The conductor layer includes a main body and a joint portion.
The main body is connected to the joint and
The flexible flat cable structure according to claim 1, wherein a portion between the main body and the joint portion exhibits a slope. The cross-sectional shape of the plurality of lead wires in the joint portion is the same as or different from the cross-sectional shape of the plurality of lead wires in the main body.
The flexible flat cable structure according to claim 6, wherein the plurality of lead wires in the main body have a cross-sectional shape of a square, a triangle, a rectangle, and a polygon. The flexible flat cable structure according to claim 7, wherein the plurality of lead wires in the main body have a circular cross-sectional shape. The flexible flat cable structure according to claim 6, wherein the cross-sectional shape of the plurality of lead wires in the joint portion is a sheet shape. The flexible flat cable structure according to claim 8, wherein there is a gap between the plurality of lead wires.

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