KR20060110817A - Flexible flat cable, and method for plating flexible flat cable - Google Patents

Abstract

A flexible flat cable and a method for plating a contact portion of the same are provided to implement a high density wiring and to prevent the generation of a fire. In a flexible flat cable, a conductive wire(10) has a constant length arranged in a plane shape to be separated at a predetermined distance. A pair of bodies(20) coat an overall surface of the arranged wire(10). A contact part(10c) is formed by exposing at least one surface from a top surface and a bottom surface of the wire(10) to the bodies(20). And, a plating layer(60) is formed on the contact part(10c) of the wire(10) exposed to the outside by an opening part.

Description

Flexible flat cable and method for plating flexible flat cable

1 is an external perspective view showing a state before cutting a general flexible flat cable.

FIG. 2 is an external perspective view of the unit flexible flat cable shown by cutting the flexible flat cable of FIG.

3 is a cross-sectional view taken along the line “B-B” of FIG. 2.

4 is a cross-sectional view taken along the line “C-C” of FIG. 2.

* Figure 5 is a conceptual diagram showing the configuration of the plating apparatus according to the present invention.

6 is a flow chart of the plating process according to the present invention.

7 is a cross-sectional view showing a configuration of a cable according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: wire

10c: contact

20, 30: upper and lower protective film

40,50: reinforcement plate

100: supply bobbin

110: Unwind

150: plating bath

200: flexible flat cable

130: winding bobbin

120: winder

The present invention relates to a flexible flat cable, and more particularly, electroplating without tin plating can prevent short circuits between wires and further prevent fire. The present invention relates to a flexible flat cable capable of implementing wiring and a plating method for a contact portion of the flexible flat cable.

* As is well known, flexible flat cables are used for OA devices (office equipment), home appliances, and internal wiring of automobiles.

Such a flexible flat cable consists of a pair of upper and lower protective films and dozens of conductive wires embedded in the longitudinal direction inside the upper and lower protective films.

The flexible flat cable is cut into a predetermined length as necessary, and then exposed to both ends thereof by a predetermined length to form a contact portion which is electrically inserted into and contacted with a home appliance.

An example of the prior art for manufacturing the flexible flat cable as described above is as follows.

FIG. 1 is an external perspective view showing a state before cutting a general flexible flat cable, FIG. 2 is an external perspective view of a unit flexible flat cable shown by cutting the flexible flat cable of FIG. It is sectional drawing of the leader line "BB" of FIG. 2, and FIG. 4 is sectional drawing of the leader line "CC" line of FIG.

First, a raw material in a state of a conductive wire 10 having a constant fine diameter is prepared. (S1)

Next, the step (S1) is performed, and then tin (Sn) plating is performed on the surface of the conductive wire 10. (S2)

Subsequently, after performing the step (S2), the diameter of the tin-plated conductive wire 10 is drawn through a drawing process to reduce the diameter so as to be a micro-machined diameter smaller than a predetermined diameter of the raw material state.

After proceeding to the step (S3), the process of molding to form a rectangular cross-sectional shape of the required shape, for example, rectangular cross-sectional shape is carried out.

After proceeding to the step (S4) as described above, after arranging the necessary number (for example 20 to 30 lines) of the final processed conductive wires 10 approximately 0.5mm apart, and then configure the body The upper and lower protective films 20 and 30 are coated with the step of proceeding. (S5)

In this case, when the upper and lower protective films 20 and 30 are coated in the step S5, the upper and lower sides of the conductive wires 10 of several tens of lines are not coated.

That is, the upper protective film 20 is coated so that the upper surface of the conductive wire has the upper exposed region H · S by a predetermined width and a plurality of upper exposed regions H · S having a predetermined interval are formed. .

The lower protective film 30 has a lower surface of the conductive wire 10 having a lower exposed area L · S by a predetermined width, and a plurality of lower exposed areas L · S having a predetermined interval are formed. Cover as much as possible.

Here, it is preferable to form the upper exposure area H.S and the lower exposure area L.S. In more detail, the lower exposure area L · S is formed at a position separated by a predetermined distance from the position where the upper exposure area H · S is formed.

After the step (S5), the reinforcing plate 40 of the synthetic resin material is attached to the outer surface of the lower protective film 30 corresponding to the opposite side of the upper exposed area, the upper portion corresponding to the opposite side of the lower exposed area Proceed with the step of attaching the reinforcing plate 50 on the outer surface of the protective film. (S6)

After proceeding to the step (S6), and cut along the line "A" of the line crossing the reinforcing plate 40, 50 to proceed to the step of producing a unit flexible flat cable as shown in FIG. S7)

As described above, both ends 10a and 10b of the unit flexible flat cable shown in FIG. 2 to which the reinforcing plates 40 and 50 are attached to the wire 10 are exposed to the outside. The reinforcing plates 40 and 50 cut by the electrical contacts are electrically inserted into the contact portion 10c.

Since the contact portion 10c is pre-plated with tin (Sn) plating in the above description, the electrical conduction ability with the electronic product is more improved than when it is not plated.

By the way, the prior art as described above there is a risk of whisker generation because the tin plating on the conductive wire 10, the occurrence of the whisker is a plurality of conductive wires 10 arranged at intervals of 0.5mm Causes short circuits, and in severe cases, a fire may occur due to a short circuit when the flexible flat cable is installed in an electronic product.

In addition, the prior art as described above is a problem that it is not possible to manufacture a flexible flat cable having a very dense high-density wiring gap (wire spacing) by further reducing the spacing between the wires due to the fear of short and fire between the wires by the tin plating. There was also.

The present invention was created in order to solve the above problems, it is possible to prevent the occurrence of short between the wires and even the occurrence of fire by performing electroplating without performing tin plating, the spacing between the wires is very dense An object of the present invention is to provide a flexible flat cable capable of realizing high-density wiring, a manufacturing apparatus of the flexible flat cable, and a manufacturing method of the flexible flat cable using the manufacturing apparatus.

The present invention for achieving the above object is made of a conductive wire having a predetermined length arranged in a plate at a predetermined interval so as to be a sequence of tens to tens of rows, and a body covering the entirety of the arranged wires, In the flexible flat cable formed at a predetermined interval by opening at least one of the upper surface and the lower surface of the wire to form a contact portion, the contact portion of the wire exposed to the outside by the opening is formed with a plating layer It is characterized by.

The contact portion plating method of the flexible flat cable according to the present invention for achieving the above object is a conductive wire having a predetermined length arranged in a plate at a predetermined interval so that the number of strands to several tens of strands, and the arranged wire In the flexible flat cable formed of a wrapping body, the opening for forming a contact portion by exposing at least one of the upper and lower surfaces of the wire to the body at a predetermined interval, the flexible flat cable is at least several tens of times A supply bobbin preparation step of preparing a plurality of supply bobbins wound over; The wires of the cable wound on the prepared supply bobbin are repeated by electrically connecting the wires of the cable outer end wound on each supply bobbin and the wires and connectors of the cable inner end wound on the other supply bobbin. A wire connection step of electrically connecting the wires so that they are conductive; A supply bobbin installation step of installing the prepared supply bobbin on an unwinder so that the cable can be unwound after the wire connecting step; A winding bobbin installation process of installing a winding bobbin at a winder at a position spaced apart from the unwinder; A cable receiving step of installing a plating bath in which a plating electrolyte is accommodated between the supply bobbin and the winding bobbin so as to release a cable from the supply bobbin and receive it in the electrolyte of the plating bath; A cable fixing step of fixing an end of the cable accommodated in the plating tank to a winding bobbin; driving the unwinder and the winder to unwind the cable in the supply bobbin and winding the cable in the winding bobbin; It is characterized in that it comprises a plating process for flowing a predetermined current to be plated only on the contact exposed by the opening.

Hereinafter, a preferred embodiment of the flexible flat cable according to the present invention will be described in detail with reference to the accompanying drawings. Here, the same member number is attached | subjected about the same structural member as a prior art.

5 is a conceptual diagram illustrating a plating apparatus according to the present invention, FIG. 6 is a flowchart illustrating a plating process according to the present invention, and FIG. 7 is a cross-sectional view showing the configuration of the cable according to the present invention.

The present invention consists of a conductive wire (10) having a predetermined length arranged in a plate at a predetermined interval so that the number of strands to several tens of strands, and the body (20, 30) covering the entirety of the arranged wire (10) In the flexible flat cable which is formed at predetermined intervals to expose at least one of the upper surface and the lower surface of the wire 10 to the body (20, 30) to form a contact portion (10c), The plating layer 60 is formed on the contact portion 10c of the wire 10 exposed to the outside by the opening.

As illustrated in FIG. 7, the plating layer 60 may be provided with an internal plating layer 61 made of nickel (Ni) material that is plated on the contact portion 10c of the wire 10, and outside the internal plating layer 61. The outer plating layer 62 is made of a conductive material made of metal.

The outer plating layer 62 is any one of gold (Au) and silver (Ag).

The wire 10 is made of copper (Cu).

Meanwhile, the plating method of the present invention configured as described above will be described with reference to FIGS. 5 and 6.

The present invention is composed of a conductive wire 10 having a predetermined length arranged in a plate at a predetermined interval so that the number of strands to several tens of strands, and the body (20, 30) surrounding the arranged wire 10, The contact portion 10c may be formed in a flexible flat cable having openings for forming a contact portion 10c by exposing at least one of an upper surface and a lower surface of the wire 10 to the bodies 20 and 30. Plating.

First, a supply bobbin preparation process is performed to prepare a plurality of supply bobbins 100 on which the flexible flat cable is wound at least several dozen times.

Then, wires 10 and connectors of the inner ends of the cable 200 wound around the cable bobbin 100 and the other ends of the cable 200 wound around the respective supply bobbins 100 By repeating the process of using the electrical connection by using a wire connection process for electrically connecting the wires so that the wires of the cable wound on the prepared supply bobbin 100 is conducted.

Here, the wire 10 at the end of the cable 200 is exposed to the first supply bobbin of each of the supply bobbins 100 to electrically connect the wires 10. In addition, the first supply bobbin is made of a conductive material to connect a current having a negative polarity from the outside.

Next, after the wire connection process, the supply bobbin installation process for installing the prepared supply bobbin 100 to the unwinder 110 so that the cable can be released.

In addition, the winding bobbin installation process of installing the winding bobbin 130 on the winder 120 at a position spaced apart from the unwinder 110 is performed.

Next, a plating bath 150 in which plating electrolyte is accommodated is provided between the supply bobbin 100 and the take-up bobbin 130.

Here, the plating bath 150 is divided into two plating baths 151 and 152 in the longitudinal direction by the partition partition wall 153b, and approximately the middle height of the front partition wall 153a of the plating bath 151. The cable passage hole 150a through which the flat cable 200 passes is formed therethrough, and the cable passage hole 150b is formed through the partition partition wall 153b at the same height as the height of the cable passage hole 150a. Also, the cable through hole 150c is formed through the rear partition wall 153c of the plating bath 152 at the same height as the height of the cable through hole 150a and 150b.

In the plating bath 151 adjacent to the supply bobbin 100, the plating electrolyte is accommodated to the water level below the cable through holes 150a and 105b, and nickel (Ni) is used as the electrolyte.

The plating bath 152 adjacent to the winding bobbin 130 has a plating electrolyte contained below the level of the cable passing holes 150b and 150c, and the plating electrolyte includes gold (Au), Any one of silver (Ag) is used.

In addition, a pair of rollers 400a and 400b spaced a predetermined distance from each other so that the flat cable to be transported is immersed in the electrolyte in the plating bath 151 so as to be rotatable. Is rotatably installed in, but is installed in a state substantially immersed in the electrolyte.

In addition, in the plating bath 152, a pair of rollers 400c and 400d spaced a predetermined distance from each other so that the flat cable to be transported is immersed in the plating electrolyte (not shown). H) is rotatably installed, but is installed in a state substantially immersed in the whole liquid.

 The cable receiving process is performed so that the cable between the supply bobbin 100 and the take-up bobbin 130 is accommodated in the electrolyte of the plating baths 150; 151 and 152.

In more detail, after loosening the tip of the cable 200 to the supply bobbin 100, as shown in Figure 5, after passing the cable through hole 150a of the plating bath 151, roller 400a After passing through the lower surface of 400b and passing through the cable through hole 150b formed in the partition partition wall 153b, passing through the lower surface of the rollers 400a and 400b, the cable through hole 150c formed in the rear partition wall 153c. Finally pass it through.

Thereafter, the front end of the cable is fixed to the winding bobbin 130 to the winding bobbin 130 installed at the rear end of the plating tank (150; 152).

In this case, the cables are accommodated in the electrolyte in the plating baths 151 and 152 by rollers 400a and 400b and 400c and 400d provided in the plating baths 151 and 152. That is, the exposed contact portion 10c of the cable is accommodated in the electrolyte of the plating baths 151 and 152.

Lastly, the unwinder 110 and the winder 120 are driven to unwind the cable in the supply bobbin 100 and the cable in the winding bobbin 130 and the first supply bobbin. When a current having a negative polarity is applied and a current having a positive polarity is applied to each of the plating tanks 151 and 152 constituting the plating tank 150, the current is exposed by the opening of the cable. Only the contact portion 10c of the wire 10 is plated, the upper and lower protective film 20, 30 and the reinforcing plate 4 is not plated because the material is a synthetic resin.

In addition, copper (Cu) is used as the material of the wire 10.

When the above process is performed, the contact portion 10c exposed to the outside of the wire of the flexible flat cable is plated.

In more detail, since the electrolytic solution is made of nickel (Ni) in the plating bath 151, the nickel plating layer 61 is formed on the surface of the wire 10 made of copper (Cu).

Subsequently, the plating solution 152 is made of any one of gold (Au) and silver (Ag), and thus the gold (Au) or silver (Ag) plating layer 62 is formed on the nickel-plated surface of the wire 10. ) Is formed.

* As described above, the present invention can prevent the occurrence of short between the wires by performing electroplating without performing tin plating, and can realize high-density wiring with a very close spacing between wires.

In addition, by supplying a large number of supply bobbins wound with unplated flexible flat cables and plating them by electrically connecting the wires of the cables, a large amount of plated cables can be mass-produced in a short time, thereby greatly reducing production costs. There is an advantage to this.

Meanwhile, in the above description of the present invention, a connector for electrically connecting the wire of the flexible flat cable and the wire of another adjacent flexible flat cable may be connected by soldering or the like, and wires are inserted at both ends of separate connector members. It can also be electrically connected.

As described above, according to the present invention, electroplating may be performed without tin plating to prevent short circuits between wires and further to prevent fire, and to achieve high-density wiring having a very close spacing between wires. Will be.

Claims (7)

It consists of a conductive wire 10 having a predetermined length arranged in a plate at a predetermined interval so that the number of strands to several tens of strands, and the body (20, 30) covering the entirety of the arranged wire 10, In the flexible flat cable is formed at a predetermined interval the opening for forming the contact portion 10c by exposing at least one of the upper surface and the lower surface of the wire 10 to the body (20, 30), Flexible flat cable, characterized in that the plating layer 60 is formed in the contact portion (10c) of the wire (10) exposed to the outside by the opening. The method of claim 1, The plating layer 60 is an inner plating layer 61 of nickel (Ni) material to be plated on the contact portion 10c of the wire 10 and an outer plating layer of a conductive material made of a predetermined metal outside the inner plating layer 61. Flexible flat cable, characterized in that (62). The method of claim 2, The outer plating layer 62 is a flexible flat cable, characterized in that any one of gold (Au), silver (Ag). The method according to any one of claims 1 to 3, Flexible wire cable, characterized in that the material of the wire (10) copper (Cu). Consists of a conductive wire 10 having a predetermined length arranged in a plate at a predetermined interval so that the number of strands to several tens of strands, and the body (20,30) surrounding the arranged wire 10, the body 20 In the flexible flat cable formed at predetermined intervals, openings for forming the contact portion 10c by exposing at least one of the upper and lower surfaces of the wire 10 to 30, A supply bobbin preparation step of preparing a plurality of supply bobbins in which the flexible flat cable is wound at least several tens of times; The wires 10 at the outer ends of the cables 200 wound on the respective supply bobbins 100 and the wires 10 and the connectors at the inner ends of the cables 200 wound on the other supply bobbins 100 are electrically connected. A wire connection process of electrically connecting the wires such that the wires of the cable wound on the prepared supply bobbin 100 are conducted by repeating the process of connecting the wires; A supply bobbin installation step of installing the prepared supply bobbin 100 on the unwinder 110 so that the cable can be unwound after the wire connecting process; A winding bobbin installation process of installing the winding bobbin 130 on the winder 120 at a position spaced apart from the unwinder 110 by a predetermined distance; A plating bath 150 is installed between the supply bobbin 100 and the take-up bobbin 130 to release the cable from the supply bobbin 100 to be accommodated in the electrolyte of the plating bath 150. Receiving process; A cable fixing step of fixing the front end of the cable accommodated in the plating bath to the winding bobbin 130; The unwinder 110 and the winder 120 are driven so that the cable is unwinded from the supply bobbin 100 and the cable is unwinded from the winding bobbin 130. And a plating process for plating a contact only with the contact portion (10c) exposed by the opening by flowing a current. The method of claim 5, The plating bath 150 is separated into two plating baths in the longitudinal direction. Nickel (Ni) is used as the plating electrolyte in the plating bath 151 adjacent to the supply bobbin 100, and the winding bobbin 130 The plating method of the contact portion of the flexible flat cable, characterized in that any one of gold (Au), silver (Ag) is used as the plating electrolyte to the adjacent plating bath (152). The method according to claim 5 or 6, Copper plating (Cu) as a material of the wire (10), the contact portion plating method of the flexible flat cable.

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