JPH0568804B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to improvements in the structure of a flat cable in which a strip-shaped conductor made of metal foil such as aluminum foil is sandwiched between insulating films on both sides, and in its manufacturing method. Regarding.

[Prior Art] FIG. 6 is a sectional view showing an example of a conventional flat cable. The flat cable 1 has a first insulating film 3 and a second insulating film 4 that sandwich a strip-shaped conductor 2 made of metal foil such as aluminum foil from both sides. The first insulating film 3 and the second
The insulating film 4 is bonded to the strip conductor 2 via adhesive layers 5 and 6, respectively.

[Problems to be Solved by the Invention] When connecting the ends of the flat cable 1, the strip-shaped conductor 2 must be exposed. However, in the flat cable 1, the strip conductor 2 is bonded to the insulating films 3, 4 by the adhesive layers 5, 6 even at the ends. Therefore, in connection, it is necessary not only to peel off the insulating films 3 and 4 from the strip conductor 2, but also to remove the adhesive remaining on the surface of the strip conductor 2. Therefore, the connection work is complicated, and an improvement has been desired.

On the other hand, in order to facilitate connection at the ends, it is conceivable to insert the strip-shaped conductor through a bag-shaped insulating film, for example. However, when a bag-shaped insulating film is prepared and a strip-shaped conductor is inserted inside the bag-shaped insulating film, it is difficult to efficiently manufacture a long flat cable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a flat cable that allows easy electrical connection at the end.
It is also an object of the present invention to provide a method for manufacturing such flat cables with excellent mass productivity.

[Means for Solving the Problems] The flat cable of the present invention includes a strip conductor made of metal foil, and a strip conductor formed on one side of the strip conductor.
At least two rows of adhesive layers extending in the length direction of the strip conductor; a first insulating film having a width wider than the strip conductor and bonded to the strip conductor via the adhesive layer; It is provided with a second insulating film having the same width as the strip-shaped conductor and attached to the first insulating film on both sides of the strip-shaped conductor.

Further, in the method for manufacturing a flat cable of the present invention, the first and second insulating films and the first
Prepare a band-shaped conductor made of the above metal foil, apply adhesive in at least two rows to one side of the first insulating film and/or the band-shaped conductor, and bond the band-shaped conductor and the first insulating film via the adhesive. Then, an adhesive is applied to the other side of the second insulating film and/or the band-shaped conductor of the composite, and the second insulating film is bonded to the first insulating film so as to surround the band-shaped conductor. It is equipped with a process.

[Function] In the flat cable of the present invention, a strip-shaped non-bonded region is formed, and a non-bonded portion is formed between the strip-shaped conductor and the first insulating film, so that Even if it is cut, the conductor surface can be easily exposed by removing the first insulating film using the non-adhesive portion between the band-shaped conductor and the first insulating film at the end. Moreover, since there is a region on the strip-shaped conductor where no adhesive is applied, the complicated work of removing the adhesive from the surface of the strip-shaped conductor can be reduced.

Further, in the method for manufacturing a flat cable of the present invention, at least two rows of adhesive are applied to one side of the first insulating film or the strip-shaped conductor, the adhesive is also applied to the second insulating film, and the adhesive is simply applied to the second insulating film. A flat cable having the above structure can be obtained simply by bonding the first and second insulating films to the strip conductor. Therefore, without the need for special equipment,
It can be mass-produced efficiently.

[Description of Embodiment] FIG. 1 shows a cross section of a flat cable according to an embodiment of the present invention. In the flat cable 11,
A strip conductor 1 made of metal foil such as aluminum foil in the center
2 is placed. An adhesive layer, that is, a plurality of rows (two rows in this embodiment) of adhesive regions 14 extending in the length direction of the strip conductor 12 is formed on the upper surface of the strip conductor 12 . Therefore,
Between the adhesive regions 13 and 14, there is a non-adhesive region 12a.
will be formed.

Further, on the upper surface of the adhesive areas 13 and 14,
A first insulating film 15 is bonded via the adhesive regions 13 and 14. Similarly, a second insulating film 18 is interposed on the lower surface side of the strip conductor 12 with adhesive regions 16 and 17 interposed therebetween.
First insulating film 15 and second insulating film 18
are bonded to each other with adhesive in regions 16 and 17, and surround the central strip-shaped conductor 12.

As described above, in the embodiment shown in FIG. 1, adhesive regions 13, 14, 16, and 17 are formed on the upper surface of the strip conductor 12 and extend in the length direction of the strip conductor 12. Non-adhesive areas 12a and 12b are provided on the upper and lower surfaces of the strip conductor 12, respectively.
remains. Therefore, gaps 19a, 19b are formed between the first insulating film 11 and the second insulating film 18 in the non-bonded regions 12a, 12b.

In the flat cable 11, the gaps 19a and 19b are provided as described above, so when the flat cable is cut at an arbitrary position, the gaps 19a and 19b are used to cut the first insulating film 15 at the end. Alternatively, the second insulating film 18 can be easily removed and the strip-shaped conductor 12 can be exposed. In this case, the non-adhesive areas 12a, 12b
Since no adhesive is applied to the strip conductor 12, the exposed strip conductor 12 can be used as it is to easily make an electrical connection.

In the flat cable 11 shown in FIG. 1, the non-adhesive regions 12a and 12b were formed on both the upper and lower surfaces of the strip conductor 12, but the non-adhesive region 12a or 12b was formed only on either one. Good too. However, in that case, the strip conductor 12
Electrical connections will be made only on one side.

Next, examples of materials for constructing the flat cable 11 will be shown. The strip conductor 12 can be constructed using any metal foil such as aluminum foil, copper foil, or tin foil. Also, adhesive area 1
For example, urethane adhesive or acrylic adhesive can be used for 3, 14, 16, and 17.
The insulating films 15 and 18 are made of any synthetic resin material,
For example, those made of polyester resin or nylon can be used.

Next, a method for manufacturing the flat cable 11 shown in FIG. 1 will be explained.

First, prepare first and second insulating films,
As shown in FIG. 2, adhesive regions 13 and 14 are formed on one side of the first insulating film 15. As shown, the adhesive areas 13 and 14 are connected to the insulating film 15.
It is formed to extend in the length direction. Next, using the adhesive regions 13 and 14, the strip-shaped conductor 12 made of metal foil is bonded together as shown in FIG. 3 to obtain a bonded body 21. At this time, the adhesive region can be applied to either or both of the first insulating film 15 and the strip-shaped conductor 12. Furthermore, the adhesive regions 13 and 14 are preferably provided so as not to protrude from both widthwise ends of the strip-shaped conductor. This is because blocking does not occur during winding.

Next, a plurality of rows of adhesive regions 16 and 17 are formed on the second insulating film 18. On this occasion,
Adhesive areas 16 and 17 are connected to the second insulating film 18
It can be applied to either or both of the strip-shaped conductor surface side of the composite of the first insulating film and the strip-shaped conductor. Further, the regions 16 and 17 may be provided so as to protrude from both ends of the strip conductor in the width direction. It is possible to bond the first and second insulating films together using the adhesive in this area. Then, the bonded body 21 shown in FIG. 3 is inverted and bonded onto the insulating film 18 shown in FIG. 4. In this way, FIGS.
A flat cable 11 as shown in the figure can be obtained.

Note that when forming the adhesive regions 16 and 17 shown in FIG. 4, an adhesive region that uniformly covers the insulating film 18 may be formed instead of the adhesive regions 16 and 17. In this case, the above-mentioned gap will be formed only on one side of the strip conductor 12.

Further, as for the adhesive regions 13 and 14 formed on the first insulating film 15 side, more adhesive regions may be provided so as to extend in the longitudinal direction of the insulating film 15. However, in order to facilitate the peeling off of the first insulating film 15, as shown in the figure, it is necessary to apply one layer to each end near both ends of the strip conductor 12.
Preferably, the adhesive regions 13, 14 are formed in rows.

In addition, in the manufacturing method shown in FIGS. 2 to 5,
Although the process of manufacturing one long flat cable 11 has been described, it is also possible to manufacture a plurality of flat cables 11 at the same time. That is, by preparing a wide first insulating film and a second insulating film, it is possible to obtain a structure in which a plurality of flat cables 11 are interconnected at their longitudinal edges. It is sufficient to cut each flat cable along its length. Therefore, the flat cable 11 shown in FIG. 5 can be efficiently mass-produced.

[Effects of the Invention] In the flat cable of the present invention, a strip-shaped non-adhesive region is formed between at least two rows of adhesive regions, so even if it is cut in the transverse direction at an arbitrary position, the first insulating film can be easily peeled off using the non-adhesive area of the strip conductor, and no adhesive remains on the exposed non-adhesive area of the strip conductor, making electrical connections easy and reliable. can be done.

Further, according to the manufacturing method of the present invention, the above structure can be easily obtained by simply preparing the first and second insulating films, performing a predetermined bonding process, and then bonding them together with the strip-shaped conductor. Therefore, mass production can be carried out efficiently.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a flat cable according to an embodiment of the present invention. Figures 2 to 5 are diagrams for explaining an example of the process of manufacturing the flat cable shown in Figure 1, and Figure 2 shows a state in which an adhesive region is formed on the first insulating film. 3 is a perspective view showing a state in which the strip conductors are bonded together, FIG. 4 is a perspective view showing a state in which an adhesive region is formed on the second insulating film, and FIG. FIG. 5 is a perspective view showing a state in which the bonded body shown in FIG. 4 is inverted and bonded onto the second insulating film shown in FIG. 4; FIG. 6 is a sectional view showing an example of a conventional flat cable. In the figure, 11 is a flat cable, 12 is a strip conductor, 12a, 12b are non-bonded areas, 13,
14, 16, and 17 are adhesive regions, 15 is a first insulating film, and 18 is a second insulating film.

Claims (1)

[Scope of Claims] 1. A strip-shaped conductor made of metal foil; at least two rows of adhesive layers formed on one side of the strip-shaped conductor and extending in the length direction of the strip-shaped conductor; and a layer wider than the strip-shaped conductor. a first insulating film having a width and bonded to the strip conductor via the adhesive layer; and a first insulating film provided on the other surface of the strip conductor and attached to the first insulating film on both outer sides of the strip conductor. and a second insulating film having the same width as the strip-shaped conductor. 2. Prepare a strip-shaped conductor made of first and second insulating films and one or more metal foils, apply adhesive in at least two rows on one side of the first insulating film and/or the strip-shaped conductor, and apply the adhesive through the adhesive. The band-shaped conductor and the first insulating film are bonded together to form a composite, and then an adhesive is applied to the other side of the band-shaped conductor of the second insulating film and/or the composite to surround the band-shaped conductor. A method for manufacturing a flat cable, comprising the steps of bonding the second insulating film to the first insulating film. 3. The method of manufacturing a flat cable according to claim 2, wherein at least two rows of adhesive are applied when applying the adhesive to the second insulating film.