KR101071358B1 - The flexible flat cable which excludes a electromagnetic waves obstacle and the manufacturing method - Google Patents

Abstract

The present invention relates to a flexible multi-core cable and a method of manufacturing the same, eliminating electromagnetic interference, and an object thereof is an integrally manufactured after attaching an aluminum shield member for grounding a ground wire to both ends of the flexible multi-core cable in a non-contact manner. By attaching the pad member, the flexible multi-core cable is manufactured to overcome the electromagnetic interference, so the work process is very simple and the time required for work can be reduced, and the manufacturing cost of the flexible multi-core cable can be lowered. The purpose is to form a flexible multi-core cable formed of a plurality of conductors formed on both sides of the upper and lower films on both sides, and arranged at regular intervals so that one end surface between the upper and lower films exposed to the outside and , Both ends of one side of the flexible multi-core cable manufactured by the above step Attaching the aluminum shield member of the thin plate so as not to be grounded with the conductor, and attaching a pad member to exclude the electromagnetic interference by covering and grounding a lower film including a part of the aluminum shield member so as to be electrically conductive. And a flexible multi-core cable manufactured by eliminating electromagnetic interference by this step.

Flexible Multi-core Cable, Ground Wire, Aluminum, Polyurethane

Description

The flexible flat cable which excludes a electromagnetic waves obstacle and the manufacturing method

The present invention relates to a flexible multi-core cable and a method for manufacturing the same, wherein electromagnetic interference is eliminated. More particularly, an aluminum shield member for grounding a ground line is attached to both ends of the flexible multi-core cable in a non-contact manner with a conductor. The present invention relates to a flexible multi-core cable and a method of manufacturing the same, eliminating electromagnetic interference.

As is well known, a conventional flexible flat cable (FFC) forms a heat-resistant plastic film such as polyester (PET) or polyimide (PI), which is a flexible material, on both sides, that is, on both sides thereof. And, it is manufactured through a thermal fusion apparatus through a plurality of conductors (including ground wire) arranged at regular intervals so that one end surface between the film is exposed to the outside.

The flexible multi-core cable manufactured as described above is not only cheaper in manufacturing cost and lower manufacturing cost than Flexible Print Circuit (FPC) but also flexible and can be used for moving parts, so it can be used in various electronic device products such as printers or scanners. It is widely used as a relay cable for various parts arranged.

Recently, however, the remarkable development of electric, electronic, communication and semi-assembly technology has made possible the miniaturization and high integration of almost all facilities, and it is possible to service all the information such as data, voice, and image by using the high-speed integrated information communication network. It is also facing a high information age where all information can be shared through computers.

The signal transmission cable used correspondingly to this high information age is required to be compatible with high speed transmission because the signal transmission speed becomes high and the resistance to noise may decrease.

However, in such a cable, an unnecessary electromagnetic interference becomes a problem at the same time as the signal transmission speed is increased.

In consideration of this point, recently, a flexible multicore cable has been manufactured in which a thin aluminum plate is attached in order to overcome electromagnetic interference by grounding a ground wire among exposed conductors.

1 is a view showing a flowchart of a work process for attaching a thin aluminum shield provided to overcome obstacles caused by electromagnetic waves due to the use of a conventional general flexible multicore cable. Looking at it, the upper and lower films are formed on both sides, and the upper and lower films are composed of a plurality of conductors arranged at regular intervals so that one end of both ends are exposed to the outside, wherein the conductors are ground lines, signal lines, signal lines, Ground line, signal line, signal line... After thermal fusion through a heat welding apparatus arranged to include one or more ground lines and signal lines, such as a bottom surface of the exposed conductor, that is, both ends of the lower film to attach a reinforcing film for the alignment and reinforcement of the exposed conductor By doing so, a flexible multicore cable is manufactured (S10).

Attaching the aluminum shield of the thin plate provided to cover and ground the reinforcing film on both ends of the flexible multi-core cable manufactured by the step (S10) (S20).

When the aluminum shield is attached by the above step (S20), the longitudinal polyurethane resin is molded to have a void in the lower film surface to attach a pad coated with a conductive adhesive layer on one surface (S30).

At this time, the pad is attached at a distance from the reinforcing film at both ends, or is attached to the central portion in the longitudinal direction of the flexible multi-core cable by a predetermined length from the end of the reinforcing film.

In this way, when the pad is attached, a polyester (PET) is coated on the top surface and a conductive adhesive is applied on the bottom surface to cover the pad and cover a part of the aluminum shield at the same time, and the bottom surface is coated with an aluminum film in the longitudinal direction. Attach (S40).

In this case, the aluminum film has an area that sufficiently surrounds the pad.

As described above, in order to overcome the obstacles caused by the use of a conventional general flexible multi-core cable, an aluminum shield is attached to the upper surface of the pad, and the pad is attached to the center of the flexible multi-core cable by manual operation by a worker in the longitudinal direction. After the pad is attached, since the pad is attached, the aluminum film is attached, so that the working process is very difficult and a lot of working time is required.

As a result, the manufacturing cost of the flexible multi-core cable also has to be raised.

Accordingly, the present invention has been made to solve the above-described problems, and after attaching the aluminum shield member for grounding the ground wire to both ends of the flexible multi-core cable non-contact with the conductor, attaching the pad member manufactured integrally By manufacturing the flexible multi-core cable to overcome the electromagnetic interference, the work process is very simple and the time required for work can be reduced, and furthermore, the electromagnetic interference has been eliminated to reduce the manufacturing cost of the flexible multi-core cable. An object of the present invention is to provide a flexible multicore cable and a method of manufacturing the same.

The present invention for achieving the above object is to form a flexible multi-core cable consisting of a plurality of conductors formed on both sides of the upper and lower films on both sides, and arranged at regular intervals so that one end surface between the upper and lower films are exposed to the outside. And attaching an aluminum shield member of a thin plate to be non-grounded with the conductor on both ends of one side of the flexible multi-core cable manufactured by the step, and covering the lower film including a part of the aluminum shield member so as to be conductive. And attaching the pad member so as to eliminate electromagnetic interference by grounding.

Here, the step of attaching the reinforcing film to the reinforcement of the lower film and the alignment of the conductor exposed on one side of both ends of the flexible multi-core cable produced by the agenda is characterized in that it further comprises.

In addition, another object of the present invention for achieving the above object is formed of a plurality of conductors arranged at regular intervals from each other so that the upper and lower films on both sides, and one end surface between the upper and lower films are exposed to the outside. On both ends of the lower film, a conductive aluminum shield member including the reinforcement film to cover a part of the lower film and attached to one surface of the reinforcement film attached for alignment and reinforcement of the exposed conductor, and to be conductive with the aluminum shield member. It is characterized in that it comprises a pad member which is attached to the lower film in the longitudinal direction so as to eliminate the electromagnetic interference by covering and grounding part.

Here, the pad member is formed of a polyurethane resin to have a void to reduce the dielectric constant (ε), one side of the pad is coated with an adhesive so as to be attached to a portion of the aluminum shield member and the lower film A thin layer of aluminum having a PET layer, which is attached to a layer and an upper surface of the pad layer, and has a conductive adhesive coated on the bottom thereof to be conductive with the aluminum shield member and a polyester coated on the top to prevent the upper surface from being conductive. It is characterized by consisting of a film.

According to the flexible multi-core cable excluding the electromagnetic interference according to the present invention as described above and a method for manufacturing the same, the aluminum shield member for grounding the ground wire is attached to both ends of the flexible multi-core cable non-contact with the conductor, then integrally By attaching the manufactured pad member, the flexible multi-core cable is manufactured to overcome the electromagnetic interference, so the work process is very simple and the time required for work can be reduced, and the manufacturing cost of the flexible multi-core cable can be lowered. It has an effect.

Hereinafter, an embodiment of a flexible multi-core cable excluding the electromagnetic interference according to the present invention and a manufacturing method thereof will be described in detail.

First, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

2 is a process chart for explaining a method for manufacturing a flexible multi-core cable excluding electromagnetic interference according to the present invention.

As shown in the drawing, the upper and lower films are formed on both sides, and the bottom of the plurality of conductors arranged at regular intervals so that one end of the both ends are exposed to the outside between the upper and lower films, that is, the conductors exposed at both ends of the lower film. A step of manufacturing a flexible multi-core cable by attaching a reinforcement film to both ends of the upper film for alignment and reinforcement (S100), including a reinforcement film on both ends of one side of the flexible multi-core cable manufactured by the step (S100) Attaching the aluminum shield member of the thin plate to cover a portion of the upper film (S110), and a pad member including a portion that is electrically conductive with the aluminum shield member to cover and ground the upper film to eliminate electromagnetic interference Attaching is made (S130).

On the other hand, the manufactured flexible multi-core cable 200 of the flexible multi-core cable manufacturing method excluding the electromagnetic interference according to the present invention described above to form the upper and lower films (210, 220) on both sides as shown in FIG. The upper and lower films 210 and 220 are formed of a plurality of conductors 230 that are arranged at regular intervals so that one surface of both ends is exposed to the outside, that is, the bottom surface of the exposed conductor 230, that is, of the upper film 210 Both ends of the aluminum shield member 250 including the reinforcement film on one surface of the reinforcement film 240 attached for the alignment and reinforcement of the exposed conductor 230 is provided to cover a portion of the upper film 210, and the It comprises a pad member 260 which is attached to the upper film 210 in the longitudinal direction so as to exclude the electromagnetic shielding by covering and grounding a part to be conductive with the aluminum shield member 250. .

Here, the pad member 260 is molded of a polyurethane resin to have a void to reduce the dielectric constant (ε), one side of the aluminum shield member 250 and the upper film 210 A pad layer 262 to which an adhesive 261 is applied to be attached to the pad layer 262, and a top surface of the pad layer 262 to be attached thereto, and a conductive adhesive 263 is applied to the bottom surface of the pad layer 262 so as to be conductive with the aluminum shield member 250. The upper surface is formed of a thin aluminum film 265 having a PET layer 264 coated with a polyester (PET) to prevent conduction.

Hereinafter, a method of manufacturing a flexible multicore cable excluding the electromagnetic interference according to the present invention with reference to FIG. 2 will be described in detail.

First, the manufacturing step (S100) of the flexible multi-core cable, having a top film and a lower film so that the heat-resistant plastic film is positioned on the upper, lower, and at regular intervals so that one side between the upper and lower film is exposed to the outside. After thermally fusion through a plurality of arranged conductors through the heat fusion apparatus, the conductors exposed on one surface of both ends are more stably aligned and manufactured by attaching a reinforcement film provided to protect the upper film.

In this case, the conductor has a ground line for grounding and a signal line for transmitting a signal (information) alternately, that is, a ground line (G), a signal line (S), a signal line (S), a ground line (G), and a signal line (S). ), Signal line S... It is arranged to include one or more ground lines and signal lines as shown.

Attaching the aluminum shield member of the thin plate (S110) is a step provided by covering a portion of the reinforcement film and a portion of the upper film so as to conduct through the ground line and a connector not shown in the plurality of conductors.

That is, the aluminum shield member of the thin plate is not directly connected to the ground line but is electrically connected to the ground line through connectors provided at both ends thereof.

Attaching the pad member (S130) is connected to the aluminum shield member of the thin plate is molded of a polyurethane resin to have a cavity (vacancy) to reduce the dielectric constant (ε) of the flexible multi-core cable, the one side is A pad layer on which an adhesive is applied so as to be attached to a part of the aluminum shield member and the upper film; A pad member made of a thin aluminum film coated with a polyester (PET) is coated to include a part of the aluminum shield member so as to be electrically conductive, and to cover the top film so as to prevent electromagnetic interference. Step.

In order to manufacture the flexible multi-core cable excluding the electromagnetic interference by the method of manufacturing a flexible multi-core cable according to the present invention made as described above, as shown in Figure 2, first, the heat-resistant plastic film The upper film 210 and the lower film 220 are disposed to be positioned below the ground line G and the signal line S at regular intervals so that one surface of both ends is exposed to the outside between the upper and lower films 210 and 220. , Signal line S, ground line G, signal line S, signal line S,. After thermally fusion through the heat fusion apparatus through a plurality of conductors 230 arranged to include one or more ground lines and signal lines as described above, the conductors 230 exposed to the lower film 220 are aligned and the upper portion is arranged. Attaching the reinforcement film 240 to reinforce the film 210 to produce a flexible multi-core cable (C) (S100).

When the reinforcement film 240 is attached to both ends of the upper film 210, the reinforcement film 240 is completely covered and at the same time to cover a portion of the upper film 210 to be grounded with the ground line (G) through a connector. The aluminum shield member 250 of the thin plate is attached (S110).

When the aluminum shield member 250 is attached to cover the reinforcement film 240 attached to both ends of the upper film 210 as described above, the pad layer 262 formed of polyurethane resin is formed on the bottom of the conductive adhesive 263. And a pad member 260 having a thin aluminum film 265 integrally formed thereon with a PET layer 264 coated with a polyester on the top thereof to be connected to the aluminum shield member 250. Attached in the longitudinal direction of the multi-core cable (C) (S130).

In this way, since the flexible multi-core cable is manufactured to have the aluminum shield member of the thin plate grounded through the ground wire and the connector and the pad member grounded with the aluminum shield member, the flexible multi-core cable excluding electromagnetic interference can be more easily and easily manufactured. Will be.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a process diagram illustrating a method for manufacturing a flexible multi-core cable excluding a conventional electromagnetic interference in the related art

2 is a process diagram illustrating a method for manufacturing a flexible multi-core cable excluding electromagnetic interference according to the present invention.

3 is a perspective view showing a flexible multi-core cable excluding the electromagnetic interference according to the present invention

4 is a cross-sectional view taken along line AA ′ of FIG. 3.

5 is a cross-sectional view taken along line BB ′ of FIG. 3.

* Description of the symbols for the main parts of the drawings *

200; Flexible multi-core cable eliminates electromagnetic interference

210; Top film

220; Bottom film

230; Conductor

240; Reinforcement film

250; Aluminum shield member

260; Pad member

Claims (5)

Forming an upper and lower film on both sides, and manufacturing a flexible multi-core cable composed of a plurality of conductors arranged at regular intervals so that one end of the upper and lower films are exposed to the outside at both ends (S100); Attaching an aluminum shield member of a thin plate so as not to be grounded with the conductor at both ends of one side of the flexible multi-core cable manufactured by the step (S100); It comprises a step (S130) of attaching a pad member so as to exclude the electromagnetic shielding by covering the upper film by including a portion conductively with the aluminum shield member (S130), The pad member attached by the step (S130), is formed of a polyurethane resin to have a void (drop) in order to drop the dielectric constant (ε), one side so as to be attached to a portion of the aluminum shield member and the upper film It is attached to the pad layer and the upper surface of the pad layer, the adhesive is applied, a conductive adhesive is applied on the bottom so as to be conductive with the aluminum shield member, and a polyester (PET) is coated on the upper surface to prevent the conductive Method for producing a flexible multi-core cable to eliminate electromagnetic interference characterized in that consisting of a thin aluminum film. The method of claim 1, The step (S100), the manufacturing method of the flexible multi-core cable excluding the electromagnetic interference, characterized in that it comprises the step of attaching a reinforcement film to reinforce the lower film and the alignment of the conductor exposed on one side of both ends. delete The upper and lower films 210 and 220 are formed on both sides, and ground lines G, signal lines S, and signal lines S are disposed at regular intervals so that one surface of both ends is exposed to the outside between the upper and lower films 210 and 220. Ground line (G), signal line (S), signal line (S)... Consists of a plurality of conductors 230 are arranged to include one or more ground lines and signal lines, such as reinforcement film 240 attached to both ends of the lower film 220 for alignment and reinforcement of the exposed conductor 230 An aluminum shield member 250 including the reinforcement film 240 on one surface thereof to cover a portion of the upper film 210; A pad member 260 which is attached to the upper film 210 in a longitudinal direction so as to exclude electromagnetic interference by covering and grounding a part of the aluminum shield member 250 so as to be conductive;  A flexible multi-core cable excluding electromagnetic interference, which is prepared by claim 1 or 2 comprising. 5. The method of claim 4, The pad member 260 is formed of a polyurethane resin to have a void in order to lower the dielectric constant ε, and may be attached to a portion of the aluminum shield member 250 and the upper film 210 on one surface thereof. A pad layer 262 to which an adhesive 261 is applied, It is attached to the upper surface of the pad layer 262, the bottom surface is coated with a conductive adhesive 263 so as to be conductive with the aluminum shield member 250 and a polyester (PET) is coated on the top surface to prevent the conductive PET Flexible multi-core cable excluding electromagnetic interference, characterized in that consisting of a thin aluminum film 265 having a layer (264).

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