JP2001217030A - Connecting method of tape wire and its structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency and to reduce the process cost. SOLUTION: The connecting portions 10a, 20a of two tape wires 10, 20 having one surface of their insulating film removed holds a connecting part 1 in between, and the exposed conductor line 11, 12 at the above connecting portions 10a, 20a of each tape wire 10, 20 and a conductor part 5 are put overlapped each other in contact. And an adhesive layer 3, 4 and the tape wire surface are pasted, thereby the conductor lines 11, 12 press the conductor part 5 by the shrinking force in the thickness direction at the time of hardening the adhesive layer 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape electric wire for electrically connecting tape electric wires such as a flexible flat cable (FFC) or a flexible printed circuit (FPC) in which both surfaces of a conductor are covered with an insulating film. Connection method and its structure.

[0002]

2. Description of the Related Art A tape electric wire has a structure in which a conductor is covered on both sides with two insulating films, and the connection between the tape electric wires has conventionally been made by using a single-sided or double-sided insulating film on both tape electric wires. This has been done by exposing the conductor by peeling off the portion, overlapping the exposed conductors, and applying ultrasonic waves or resistance welding.

[0003]

However, when the conductors are electrically connected to each other by welding, there is a disadvantage that a large-scale device is required, the work is troublesome, and the processing cost is increased. .

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art, and it is an object of the present invention to provide a method and a structure for connecting a tape electric wire which can improve workability and reduce processing costs. Aim.

[0005]

According to a method of connecting a tape electric wire of the present invention, a conductive member is held on a film-like holding member so as to penetrate the film-like holding member and protrude from both sides.
Two tape wires each having a conductor covered with an insulating film, using a connection member provided with an adhesive layer that contracts upon curing on at least a part of the periphery of the conductive member on both surfaces of the holding member. A method of connecting a tape wire for electrically connecting the conductors of the two tape wires, wherein the connection member between the two tape wires from which a part of the insulating film on one side is peeled off, the connection member is sandwiched, and each tape A step of superposing the exposed conductor and the conductive member on the connection portion of the electric wire in a state of contact with each other, and a step of pressing the connection portion sandwiching the connection member from the outside to adhere the adhesive layer and the surface of the tape wire; And curing the two adhesive layers in this state, and contracting the adhesive layers in the thickness direction of the adhesive layers, whereby the conductor presses the conductive member.

[0006] The connection structure of the tape electric wire of the present invention comprises:
The conductive member is held by the film-shaped holding member so as to penetrate through the holding member and protrude from both surfaces, and shrinks at the time of curing on at least a part of the area around the conductive member on both surfaces of the holding member. A tape wire connection structure in which a conductor of two tape wires in which a conductor is covered with an insulating film is electrically connected to each other using a connection member provided with an adhesive layer, and a single-sided insulating property is provided. The connection portions of the two tape wires where a part of the film has been peeled off sandwich the connection member therebetween, and the exposed conductors and conductive members at the connection portions of the respective tape wires are overlapped with each other in a state where they are in contact with each other, In addition, the adhesive layer and the surface of the tape electric wire are adhered to each other, and the conductor presses the conductive member by a contraction force in a thickness direction when the adhesive layer is cured.

[0007] In the present invention, the connecting portion of the two tape electric wires from which a part of the insulating film on one side is peeled is sandwiched between the connecting members, and each tape electric wire is exposed at the connecting portion. After the conductor and the conductive member are overlapped in a state of contact with each other, the conductors of both tape wires are connected to each other through the conductive member of the connection member in a state where each adhesive layer is bonded to the tape wire surface by applying pressure. Since they are electrically connected, the operation is simple, and as a result, the processing cost can be reduced.

[0008]

Embodiments of the present invention will be specifically described below.

FIG. 1C is a cross-sectional view (FIG. 5) showing a connection structure obtained by the method of connecting a tape electric wire according to the present embodiment.
FIG. 2A is an external perspective view showing a connecting member used to obtain a connection structure of the tape electric wire, and FIG. 2B is an AA line thereof. FIG. 3 is a perspective view showing a part of one surface of the tape wire used to obtain the connection structure of the tape wire. FIG. 4 is an exploded perspective view showing the connection structure of the tape electric wire according to the present embodiment, and FIG. 5C is an external perspective view showing the connection structure obtained by the method of connecting the tape electric wire according to the present embodiment. It is.

[0010] As shown in FIGS. 1C and 4, the connection structure of the tape electric wire according to the present embodiment includes two tape electric wires 1.
0, 20 and the connecting member 1 are used.

The tape wires 10 and 20 have the same structure as shown in FIG. 3, and are specifically as follows. The tape electric wire 10 has a configuration in which both surfaces of a plurality of, for example, three conductors 11 are covered with insulating films 12 and 13 and bonded together by an adhesive provided inside each of the insulating films 12 and 13. In the portion, a part of the insulating film 12 on one side is peeled off to expose the conductor 11, thereby forming a connection portion 10a.

The same applies to the tape electric wire 20. A plurality of, for example, three conductors 21 are provided on both sides of the insulating film 22, 2.
3 and bonded by an adhesive provided inside each of the insulating films 22 and 23. At one end, a part of the insulating film 22 on one side is peeled off to expose the conductor 21 and connect. A part 20a is formed. The conductor width on the exposed side of the conductors 11 and 21 and the pitch between the conductors are the same for both tape wires 10 and 20. However, as long as the predetermined conductors 11 and 21 are overlapped when the two tape electric wires are overlapped, the conductor width of the two tape electric wires 10 and 20 need not be equal to each other.

The connection member 1 has a film-shaped holding member 2, three conductive members 5 held by the holding member 2, and adhesive layers 3, 4 provided on both side surfaces of the holding member 2. . The film-like holding member 2 is, for example, a band-like member made of resin or the like, and through-holes 2 a are provided at three positions for holding the conductive member 5.

In each through hole 2a, for example, a spherical conductive member 5 made of, for example, copper or a copper alloy is fixedly attached, and an upper portion 5a and a lower portion 5b of each conductive member 5 It protrudes from the surface (see FIG. 2). As shown in FIG. 1C, the disposing position of the conductive member 5 is a position where it comes into contact with the exposed conductors 11 and 21. Further, the adhesive layers 3 and 4 provided on both side surfaces of the holding member 2 described above are formed over the entire area around the conductive member 5, and the material is made of, for example, a thermosetting acrylic resin that contracts when cured. .

The connection structure of a tape wire according to the present embodiment, in which two tape wires 10 and 20 are electrically connected by using such a connection member 1, has two tape wires 10 and 20.
The connection portions 10a and 20a from which the insulating films 12 and 22 have been peeled off sandwich the connection member 1 and overlap each other so that the conductors 11 and 21 of the tape wires 10 and 20 and the conductive member 5 are in contact with each other. And each adhesive layer 3,
4 and the tape wire surface are adhered, and the adhesive layer 3,
4 by the force of shrinkage in the thickness direction during curing
1 and 21 press the conductive member 5 against the conductive member 5 of the connection member 1.

Next, a description will be given of a manufacturing method for obtaining the tape wire connection structure according to the present embodiment. In addition, FIG.
FIGS. 5A and 5B are process diagrams (perspective perspective views) for explaining a method of connecting a tape electric wire according to the embodiment, and FIGS. 1A and 5B are cross-sectional views taken along a line DD in FIG. 1B is a cross-sectional view taken along line DD of FIG. 1, and FIG. 1C is a cross-sectional view taken along line DD of FIG. 5C.

First, as shown in FIGS. 3 and 4, connection portions 10a and 20a of two tape wires 10 and 20 are formed.
1A, the insulating films 12 and 22 were peeled off, and the conductors 11 and 2 were removed as shown in FIGS. 1 (a) and 5 (a).
The side where 1 is exposed faces inside, and the connecting member 1 is sandwiched therebetween. At this time, the conductor 11, the conductive member 5 of the connection member 1, and the conductor 21 are overlapped.

Next, as shown in FIGS. 1 (b) and 5 (b), the connecting portions 10a, 20a sandwiching the connecting member 1 are pressed from the outside by a force in the direction A, and the adhesive layer of the connecting member 1 is pressed. 3 and the insulating film 13 of the connection portion 10a are adhered,
At the same time, the adhesive layer 4 of the connection member 1 and the insulating film 23 of the connection portion 10a are bonded.

Next, both connecting portions 10 sandwiching the connecting member 1
a, heat is applied to 20a. By this heat application, the adhesive layers 3 and 4 made of a thermosetting acrylic resin are cured and contract. Due to the contraction of the adhesive layers 3 and 4 in the thickness direction, the conductors 11 and 21 are applied to the conductive member 5 of the connecting member 1 by pressing force C as shown in FIGS. 5 in contact with each other.

Therefore, according to the present embodiment,
In a state where each of the adhesive layers 3 and 4 and the surface of the tape electric wire are adhered by pressurizing, only the adhesive is thermally cured by heating or the like, and the conductors 11 and 21 of the tape electric wires 10 and 20 are connected to each other.
Since the connection can be made electrically through the conductive member 5 of the connection member 1, the connection operation is simple, and as a result, the processing cost can be reduced.

In the above-described embodiment, the conductors 11 and 2
1 and the connecting portion 10a and the connecting portion 20
a, and the two tape wires 10 and 20 are connected to each other. However, the present invention is not limited to this, and the connection portions 10a and 20a are overlapped in a state where the conductors 11 and 21 are inclined.
The same can be applied to the case where both tape electric wires 10 and 20 are connected.

FIG. 6 is a process diagram (plan view) of the manufacturing method in that case.

First, as shown in FIG. 6 (a), one of the two tape electric wires, in the illustrated example, a part of one of the insulating films 12 of the tape electric wire 10 is stripped diagonally in a strip shape to form a connection portion 10a. Form.

On the other hand, for the other tape wire 20, FIG.
As shown in (b), one end of the insulating film 22 is stripped off to form a connection portion 20a.

Thereafter, as shown in FIG. 6C, the sides of the connection portions 10a and 20a where the conductors 11 and 21 are exposed face inside, and the connection members 10a and 20a are connected with the connection member 1 therebetween. The two tape electric wires 10 and 20 are electrically connected to each other by applying pressure and heating as before. The position of the conductive member 5 of the connection member 1 in FIG. 6 has been moved to a portion where the conductors 11 and 21 overlap.

In such a case, the connection technique of the present invention can be applied to two tape wires having different conductor widths and pitches between exposed conductors. An electrical connection can be made.

In the above description, the adhesive layers 3 and 4 provided on the connection member 1 are provided on both sides of the film-like holding member 2 as shown in FIG. Although provided, the present invention is not limited to this, and may be provided on both surfaces of the holding member and in a partial area around the conductive member. For example, as shown in FIG. 7 (plan view), adhesive layers 3A, 3B, and 3C are provided on the upper surface of the holding member 2 and in a partial area around the conductive member 5, and the back surface thereof is provided. The adhesive layers 4A, 4B, and 4C may be provided. Alternatively, the adhesive layer 3B (4B) or 3C (4C)
May be omitted, or only the adhesive layer 3A (4A) may be provided. Alternatively, the adhesive layer may be provided at a position different from that in FIG. 7 and may have another shape.

In the above description, a thermosetting acrylic resin is used as the adhesive layer. However, the present invention is not limited to this, and any adhesive can be used as long as it is an adhesive that contracts when cured. May be used.

In the above description, the conductive member 5 of the connection member 1 is spherical, but the present invention is not limited to this. For example, as shown in FIGS. 8A and 8B, a conductive member 5 </ b> A having a trapezoidal cross section at a portion protruding outward from the film-like holding member 2 may be used.
In the conductive member 5A, the protruding portions 5Aa and 5Ab protruding outward from the holding member 2 are in planar contact with the conductor of the tape electric wire, so that the contact is greater than when the spherical conductive member 5 that makes line contact with the conductor is used. There is an advantage that the area can be increased. The shape of the protruding portion protruding outward from the holding member 2 is not limited to the trapezoidal cross-sectional shape shown in FIG. 8, but may be another shape.

In the above description, the present invention is applied to a tape wire in which three conductors are provided. However, the present invention is not limited to this, and the present invention includes one or more conductors. It is needless to say that the present invention can also be applied to tape wires provided in an arbitrary number.

[0031]

As described above in detail, in the case of the present invention, the connection portion of the two tape wires from which the insulating film has been peeled is sandwiched between the connection members and the conductor of each tape wire. After the conductive members are overlapped with each other so as to be in contact with each other, the conductors of the two tape wires are electrically connected to each other through the conductive members of the connecting members in a state where each adhesive layer is bonded to the tape wire surface by applying pressure. In the case of electrical connection, the adhesive layer and the surface of the tape wire are adhered, and the conductor of each tape wire can be connected in a simple manner, resulting in low processing costs. Can be achieved.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are process diagrams (cross-sectional views) for explaining a method of connecting a tape electric wire according to an embodiment of the present invention, and FIG. ) Is a sectional view taken along line DD, FIG. 5B is a sectional view taken along line DD in FIG. 5B, and FIG. 5C is a sectional view taken along line DD in FIG.

FIG. 2A is an external perspective view showing a connection member used to obtain a tape wire connection structure according to an embodiment of the present invention,
(B) is a sectional view taken along line AA of (a).

FIG. 3 is a perspective view showing a tape electric wire used to obtain a connection structure for a tape electric wire according to an embodiment of the present invention, in which a part of one surface of the tape electric wire is removed.

FIG. 4 is an exploded perspective view showing a connection structure of the tape electric wire according to the embodiment of the present invention.

FIGS. 5A, 5B and 5C are process diagrams (outer perspective views) for explaining a method of connecting a tape electric wire according to an embodiment of the present invention.

FIG. 6A is a plan view showing one tape wire used in a tape wire connection structure according to another embodiment of the present invention, and FIG. 6B is a plan view of the tape wire according to another embodiment of the present invention. Plan view showing the other tape wire used for the connection structure,
(C) is a top view which shows the connection structure of the tape electric wire which concerns on other embodiment of this invention.

FIG. 7 is a plan view showing another embodiment of the adhesive layer of the connection member used in the present invention.

8A is a perspective view showing another embodiment of the conductive member of the connection member used in the present invention, and FIG. 8B is a perspective view of B- in FIG.
It is sectional drawing by the B line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connection member 2 Holding member 3, 4 (3A-3C, 4A-4C) Adhesive layer 5, 5A Conductive member 10, 20 Tape wire 10a, 20a Connection part 11, 21 Conductor 12, 13, 22, 23 Insulating film

Continuation of the front page (72) Inventor Yasushi Saito 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5E023 AA16 BB06 BB11 BB23 CC05 CC07 CC22 DD25 HH28 5E077 BB03 BB05 BB11 BB32 CC06 CC22 DD04 DD14 EE03 HH02 HH07 JJ20

Claims (2)

[Claims] 1. A conductive member is held by a film-shaped holding member so as to penetrate the film and protrude from both sides, and is provided on at least a part of a region on both sides of the holding member and around the conductive member. Using a connection member provided with an adhesive layer that shrinks during curing, a method of connecting a tape wire that electrically connects the conductors of two tape wires each having a conductor covered with an insulating film, The connection portion in the two tape wires from which a part of the insulating film on one side is peeled off, the connection member is interposed therebetween,
And, a step of superposing the exposed conductor and the conductive member in the connection portion of each tape wire in a state of contacting each other, and pressing the connection portion sandwiching the connection member from the outside to form the adhesive layer and the surface of the tape wire. A tape wire comprising: a step of adhering; and a step of curing and shrinking both adhesive layers in that state, and a step in which the conductor presses the conductive member by a force of shrinking in a thickness direction of the adhesive layer. Connection method. 2. A conductive member is held by a film-like holding member so as to penetrate through the holding member and protrude from both surfaces, and is provided on at least a part of a region on both surfaces of the holding member and around the conductive member. A connection structure of a tape wire in which conductors of two tape wires each having a conductor covered with an insulating film are electrically connected to each other using a connection member provided with an adhesive layer that contracts upon curing. The connection portion of the two tape wires from which a part of the insulating film on one side is peeled off sandwiches the connection member therebetween,
And, the conductor and the conductive member exposed at the connection portion of each tape wire are overlapped with each other in a state of being in contact with each other, and the adhesive layer and the tape wire surface are adhered to each other when the adhesive layer is cured. By the force of contraction in the thickness direction,
A connection structure for a tape electric wire, wherein a conductor presses a conductive member.