JP2003151371A - Flat cable with shield layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide circuit connection and earth connection of a shield layer at the same time when connecting a terminal of a flat cable with the shield layer by a connector. SOLUTION: In the flat cable with a shield layer, the shield layer 15 with an inner side comprising a conductive layer 16 and an outer side comprising an insulating resin layer 17 is fixed to the flat cable 10. The circuit connection and the earth connection of the shield layer can be carried out at the same time when a connector connecting member 30 is inserted in the connector by folding back the shield layer 15 from a terminal, press-bonding the connector connecting member 30 provided with an I-shaped circuit connection terminal 32 and an L-shaped shield layer ground terminal 33 on a resin film 31, connecting the terminal 32 to a conductor 11, connecting a horizontal plate part 33a of the terminal 33 to the folded back conductive layer 16, and arranging a longitudinal plate part 33b in parallel with the terminal 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield layer-equipped flat cable, and more particularly, to a shield layer-equipped flat cable terminal provided with an earth terminal of the shield layer together with a conductor so that a shield can be formed by connecting a connector for circuit connection. The ground connection of the layers should be possible at the same time.

[0002]

2. Description of the Related Art In recent years, many sensors and electronic devices have been attached to automobiles in order to enhance safety performance, running performance and comfort. Further, as the voltage of hybrid vehicles, electric vehicles, fuel cell vehicles, and the like increases, the demand for electromagnetic wave shielding is increasing. On the other hand, along with the modularization of automobile parts, not only ordinary round electric wires but also flat cables are being used for automobile wire harnesses. Therefore, also in the flat cable, since it is necessary to shield noise due to electromagnetic waves, a flat cable with a shield layer in which a conductive layer (shield layer) made of a metal foil is coated on the outer peripheral surface of the wire is used.

In this type of flat cable with a shield layer, a plurality of conductors 2 and a drain wire 3 are arranged in parallel in a plane like a flat cable 1 shown in FIG. Both the front and back sides of 3 are continuously covered with an insulating resin film 4, and the insulating resin film 4
A shield material such as metal foil is fixed on the surface of the shield layer 5
Is formed.

As a method for establishing continuity between the shield layer 5 of the flat cable 1 and the ground wire (drain wire) 3,
Conventionally, a method of peeling off a required portion 4a of the insulating resin film 4 interposed between the shield layer 5 and the ground wire 3 and directly contacting each other has been conventionally used.

However, this peeling work of the insulating resin film is troublesome and there is a problem in workability. To solve the above problems, a method of melting and removing the insulating resin film 4 by ultrasonic waves, or a connection such as a flat cable 1'shown in FIG. By providing the parts 6 and 6, and pressing the connecting parts 6 and 6, the acute-angled part 6a at the tip,
A method has also been proposed in which the insulating film 4 is pierced by 6a and brought into contact with the drain wire 3. (Japanese Patent Laid-Open No. 2000-234
(Gazette No. 47)

[0006]

However, in the method shown in FIG. 6 as well, the step of removing the insulating film is still required, so that there is a limit in improving workability.

The present invention has been made in view of the above problems, and enables the ground connection of the shield layer without the work of removing the insulating film and the circuit connection of the conductor of the flat cable via the connector. At the same time, the task is to make it possible to connect the shield layer to the ground at the same time.

[0008]

In order to solve the above-mentioned problems, the present invention is directed to a surface of an insulating resin film which is attached to both surfaces of conductors which are arranged side by side with a conductive layer on the inside and insulation on the outside. For a flat cable with a shield layer that secures a shield layer made of a resin layer, and an insulating resin film,
A connector connecting member provided with a plurality of I-shaped circuit connecting terminals and one L-shaped shield layer grounding terminal, and a plurality of circuit connecting terminals of the connector connecting member and a shield layer grounding. The vertical plate part of the terminal for wiring has the same width as the conductor of the flat cable and is installed in parallel at the same pitch, and the horizontal plate part which is bent from the rear end of the vertical plate part of the shield layer grounding terminal is installed in parallel. It is located at a position away from the terminals for use and over the entire width of the flat cable,
The conductive layer is exposed on the outer surface by peeling the end portion of the shield layer and folding it back in two, and the horizontal plate portion of the shield layer ground connection terminal is brought into contact with the conductive layer, and the flat cable is also provided. Part of the earth for circuit connection is superposed on the conductor protruding from the tip of the connector, and the tip is protruded, and the insulating resin film of the connector connecting member is fixed by thermocompression bonding to the flat cable. There is provided a flat cable with a shield layer having a connector connecting portion in which the circuit connecting terminal and the shield layer earth connecting terminal are provided at a constant pitch.

In the connector connecting member, the I-shaped circuit connecting terminal and the L-shaped shield layer grounding terminal made of a metal plate or metal foil are fixed to an insulating resin film with an adhesive material, or The insulating resin film is formed by plating. Further, solder is applied to the surface of the terminal in advance so that it is soldered to the conductor and the conductive layer during thermocompression bonding. As the metal plate, a metal plate made of copper, tin-plated copper or brass is preferably used. Also,
As the insulating resin film, a thermosetting resin such as polyamide or polyester type thermoplastic resin or polyimide is used.

In the flat cable with a shield layer having the above structure, a connector connecting member is attached to the terminal, and a circuit connecting terminal for connecting with the conductor of the flat cable and a shield layer grounding terminal in contact with the shield layer are provided. Therefore, when the ends (including both ends) of the flat cable with the shield layer are inserted and connected to the connector, the circuit layer and the shield layer can be grounded at the same time.

In particular, since the shield layer of the flat cable with the shield layer is folded back to expose the conductive layer on the outer surface, the horizontal plate portion of the L-shaped terminal serving as the ground terminal can be directly connected. Therefore, connecting the ground terminal to the shield layer is easier than the method of using the conductor as the ground conductor by peeling off the insulating resin film and connecting the inner conductor of the flat cable to the conductive layer of the shield layer. You can

Further, since the connector connecting member is provided with an I-shaped circuit connecting terminal having the same width as the conductor of the flat cable, when the connector connecting member is attached to the flat cable by thermocompression bonding an insulating resin film. The circuit connecting terminal of the connector connecting member can be accurately overlapped with the conductor and bonded. Moreover, by arranging these I-shaped circuit connecting terminals and the vertical plate portions of the shield layer ground terminals at the same pitch and setting them to the same width, the connector connecting member can be used as a terminal of a flat cable with a shield layer. A connector-connecting terminal portion capable of simultaneously making a circuit connection and a ground connection can be easily formed only by mounting.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the shield layer 15
Connector connecting members 30 are attached to both ends of the flat cable 10 having the.

The flat cable 10 is used for a wire harness for an automobile, and a plurality of conductors 11 are arranged in parallel at intervals, and both front and back surfaces thereof are continuously bonded with an insulating resin film 14, The shield layer 15 is fixed to the above. In the present embodiment, each conductor 11 is composed of four conductors 11 made of a thin copper plate having a width of 1.5 mm and a thickness of 0.1 mm and arranged in parallel at intervals of 0.5 mm. The shield layer 15 is configured by bonding a conductive layer 16 made of a copper foil and an insulating resin layer 17 made of a PET film, and is bonded to the upper and lower insulating resin films 14 with the conductive layer 16 inside. .

The connector connecting member 30 shown in FIG. 2 has a plurality of I-shaped circuit connecting terminals 32 and one L-shaped shield layer grounding terminal 3 on the upper surface of the insulating resin film 31.
3 and 3 are provided. The terminals 32 and 33 are formed of a metal plate and fixed to the insulating resin film 31 with an adhesive material. The circuit connecting terminal 32 and the vertical plate portion 33a of the shield layer grounding terminal 33 have the same width as the conductor 11 of the flat cable 10 and are arranged in parallel at the same pitch. Further, the horizontal plate portion 33b, which is bent from the rear end of the vertical plate portion 33a of the shield layer grounding terminal 33, is arranged at a position apart from the juxtaposed circuit connecting terminals 32 in the orthogonal direction and over the entire width of the flat cable. is doing.

In this embodiment, a PET film having a thickness of 0.1 mm is used as the insulating resin film 31.
There are four I-shaped circuit connecting terminals 32, each formed of a copper plate having a length of 13 mm, a width of 1.5 mm, and a thickness of 0.1 mm. These circuit connecting terminals 32 are arranged in parallel with the conductor 11 with a pitch of 0.5 mm. The L-shaped shield layer grounding terminal 33 also has a width of 1.5.
mm, 0.1 mm thick copper plate, L-shaped vertical plate portion 33
"a" is arranged parallel to one side of the I-shaped circuit connecting terminal 32 with an interval of 0.6 mm. Horizontal plate part 33
b is arranged vertically to the metal plate 32 side.

The I-shaped metal plate of the circuit connection terminal 32 and the L-shaped metal plate of the shield layer grounding terminal 33 are preliminarily coated with solder 34 which can be thermocompression bonded.
Simultaneously with thermocompression bonding of the film 31 to the flat cable, the circuit connecting terminal 32 and the horizontal plate portion 33b of the shield layer grounding terminal 33 are soldered to the shield layer 16.
I am trying to connect with 4.

In order to connect the connector connecting member 30 to the end of the flat cable 10, as shown in FIG. 3, first, the shield layer 1 on one side from the end of the flat cable 10 is formed.
5 is peeled off over a width of about 5 mm and folded back in two folds to expose the conductive layer 16 on the surface.

Next, as shown in FIG. 4, the four conductors 11 exposed from the tip of the flat cable 10 are overlapped with one end portions of four I-shaped circuit connecting terminals 32, and are contacted. And the other end is projected to the tip. The horizontal plate portion 33b of the L-shaped shield layer ground connection terminal 33 is brought into contact with the exposed conductive layer 16, and the vertical plate portion 33a is arranged in parallel to the conductor 11 and one side portion of the circuit connection terminal 33.

Finally, the insulating resin film 31 of the connector connecting member 30 is thermocompression-bonded to fix the circuit connecting terminal 32 to the conductor 11 via solder, and the horizontal plate portion 33b of the shield layer grounding terminal 33. Are fixed to the conductive layer 16 via solder. In addition, the portion of the insulating resin film 31 to which the terminals 32 and 33 are not fixed is attached to the flat cable 1
It is pressure-bonded to the insulating resin film 14 of 0. As a result, the connector connecting member 30 becomes the flat cable 1 with a shield layer.
It is fixed at 0.

In the flat cable 10 with a shield layer having the above-mentioned structure, the connector connecting member 11 is attached to the terminal in advance, so that when the connector connecting member 11 of the terminal is inserted into the flat cable connector (not shown). At the same time that the circuit terminal accommodated in the connector is electrically contacted with the circuit connecting terminal 32, the earth terminal accommodated in the connector is a vertical plate portion of the shield layer earth terminal 33. Electrical contact is made with 33a. In this way, the circuit connection and the ground connection of the shield layer 16 can be performed simultaneously by connecting to the flat cable connector. As described above, since the shield layer can be grounded by connecting the connector, it is not necessary to connect the ground wire to the shield layer. Further, since the shield layer is folded back and connected to the L-shaped grounding terminal, the work of removing the insulating film of the flat cable, which has been conventionally required, is unnecessary.

In the present embodiment, the connector connecting member 30 has the I-shaped metal plate and the L-shaped metal plate, which are preformed on the insulating resin film 31, fixed to each other with an adhesive material. You may fix. Alternatively, a similar connector connecting member may be formed by thermocompressing a metal plate having substantially the same shape as the resin film to the insulating resin film and then cutting off the unnecessary metal plate. Furthermore, the insulating resin film may be plated to form the I-shaped circuit connecting terminal and the L-shaped shield layer grounding terminal. Also, when providing shield layers on both sides of the flat cable, if the conductive layers of the shield layers on both sides are made conductive with a metal clip, etc., the shield layer ground terminal connected to the conductive layer on one side is used. The shield layers on both sides can be grounded.

[0023]

As is apparent from the above description, according to the present invention, the connector connecting member is attached to the end of the flat cable with the shield layer, and the horizontal plate of the shield layer grounding terminal is attached to the folded shield layer. Since the parts are brought into contact with each other and thermocompression bonded for electrical connection, the work of removing the insulating resin film of the flat cable, which is conventionally required, can be eliminated. Moreover, since the connector connecting portion is formed by arranging the vertical plate portion continuous with the horizontal plate portion on one side of the circuit connecting terminal for connecting with the conductor, the connector connecting member is connected to the flat cable connector. The ground connection can be done at the same time as the circuit connection. Therefore, it is not necessary to connect the ground wire to connect the shield layer to the ground.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a perspective view,
(B) is an II sectional view of (A).

FIG. 2 is a plan view showing a connector connecting member.

FIG. 3 is a perspective view of a flat cable with a shield layer folded back.

FIG. 4A is a schematic view showing a positional relationship between the flat cable and the connector connecting member, and FIG. 4B is a schematic view showing a state in which the connector connecting members are attached to both ends of the flat cable.

FIG. 5 is a diagram showing a conventional example.

FIG. 6 is a diagram showing another conventional example.

[Explanation of symbols]

10 flat cable 11 conductors 14 Insulating resin film 15 Shield layer 16 Conductive layer 17 Insulating resin layer 30 Connector connection member 31 Insulating resin film 32 I-shaped circuit connection terminal 33 L-shaped shield layer ground terminal 33a Horizontal plate part 33b Vertical plate part

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5E077 BB05 BB25 CC06 DD03 HH07                       JJ17                 5G309 FA05                 5G311 CA01 CE01 CF02                 5G319 EA05 EB09                 5G355 AA08 BA01 BA04 BA11 CA07

Claims (2)

[Claims] 1. A flat cable with a shield layer, in which a shield layer having a conductive layer on the inner side and an insulating resin layer on the outer side is fixed to the surface of an insulating resin film attached to both surfaces of conductors arranged in parallel at intervals. And a connector connecting member in which a plurality of I-shaped circuit connecting terminals and one L-shaped shield layer grounding terminal are provided on the insulating resin film, and a plurality of circuits of the connector connecting member are provided. The connection terminal and the vertical plate portion of the shield layer grounding terminal have the same width as the conductor of the flat cable and are arranged in parallel at the same pitch, and a horizontal plate bent from the rear end of the vertical plate portion of the shield layer grounding terminal. The part is arranged at a position away from the side-by-side circuit connecting terminals and over the entire width of the flat cable.The end of the shield layer is peeled off and folded back in two to form the conductor. The outer layer is exposed to the outside, the horizontal plate portion of the shield layer ground connection terminal is brought into contact with the conductive layer, and a part of the circuit connection ground is superimposed on the conductor protruding from the tip of the flat cable. With the tip protruding, the insulating resin film of the connector connecting member is fixed to the flat cable by thermocompression bonding, and the terminal for circuit connection and the terminal for shield layer ground connection are provided at a fixed pitch. A flat cable with a shield layer that has a connector connection part. 2. The connector connecting member, wherein the I-shaped circuit connecting terminal and the L-shaped shield layer grounding terminal made of a metal plate or metal foil are fixed to an insulating resin film with an adhesive material, Alternatively, the insulating resin film is formed by plating, and solder is applied to the surfaces of the circuit connecting terminal and the shield layer grounding terminal in advance and soldered to the conductor and the conductive layer during thermocompression bonding. Cage,
The flat cable with a shield layer according to claim 1, wherein a thermosetting resin such as a polyamide or polyester thermoplastic resin or a polyimide is used as the insulating resin film.