JPH06314518A - Flexible flat wire harness - Google Patents

Abstract

PURPOSE:To expand or contract a flat wire harness with a prescribed length to make the wire harness applicable to any place where a wire harness with different length is required by overlapping the non-conductive parts, of the start position and the finish position of a folded part and making a pin to pierce them so as to engagingly lock them. CONSTITUTION:After a flat wire harness 4 is folded in the longitudinal direction to have a prescribed length, the folding start position P1 and the finish position P2 are overlapped and a flat plate 11 is attached to one of the overlapped parts. A pin 11a at the center of the plate 11 is made to pierce the non- conductive part 9 and to penetrate the double layered wire harness 4 and the other hand, pins 11b, 11b of the plate 11 are positioned at both ends in the width direction of the wire harness 4. Then, a plate 12 is attached from the other end face of the wire harness 4 and the pin 11a is inserted in a fixing hole 12a at the center of the plate 12 and at the same time tip fixing parts 11c, 11c of the pins 11b, 11b are pressed to and inserted in fixing holes 12b, 12b at both ends and projected out of the holes to unit the wire harness and plates. In this way, the wire harness is made possible to be fixed and the length is easily adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic flat wire harness, and more particularly to an FPC (flexible flat wire harness).
The length of a flexible flat wire harness is configured by covering a conductor such as a printed circuit), FWC (flexible wire circuit) or the like made of copper foil or a thin electric wire with an insulating film. It should be adjustable.

[0002]

2. Description of the Related Art Conventionally, in this type of flat wire harness, as shown in FIGS. 6 and 7A and 7B, a conductor 1 having a required pitch is formed on both sides by insulating films 2 and 3. Is covered. Note that FIG. 7A shows the case of FWC, and FIG. 7B shows the case of FPC. When the flat wire harness 4 having the above structure is used to connect the power source side and the electrical component side, the connectors 5 and 6 are attached to both ends in the length direction thereof, as shown in FIG.

[0003]

The length L of the flat wire harness 4 is equal to the length of the connectors 5 and 6 connected to both ends.
If the distance between the connectors 5 and 6 is long, it is necessary to use a flat wire harness having a long overall length L, while the distance between the connectors 5 and 6 is long. If the length is short, it is necessary to use one having a short total length L. That is, if the length L of the flat wire harness 4 is shorter than the distance between the connectors 5 and 6, it cannot be used as a matter of course. On the contrary, if the length L of the flat wire harness 4 is longer than the distance between the connectors 5 and 6, an extra portion is generated in the flat wire harness,
There is a risk that the surplus portion may hang down and interfere with other parts, resulting in a short circuit.

The flat wire harness 4 is manufactured continuously, and is normally cut by a cutting machine in order to a predetermined length. Therefore, the total length L of the flat wire harness 4 is the length set by the cutting machine. ing. By changing the cutting length by the cutting machine, the total length L is, for example, 250 cm to 50 cm.
Flat wire harnesses of different lengths are provided in several steps up to cm.

However, the required length of the flat wire harness differs depending on the place of use, and even if the flat wire harness is selected from a plurality of types of flat wire harnesses that have been cut in advance, the above-mentioned problems occur. Occur. The problem can be solved by changing the cutting length of the flat wire harness to the required length according to the place of use, but it is necessary to change the cutting length setting of the cutting machine each time. Nearly impossible.

The present invention has been made in view of the above problems, and the length of the flat wire harness can be expanded and contracted so that the flat wire harness having a constant length can be used at various places having different required lengths. The purpose is to be able to do it.

[0007]

In order to achieve the above object, according to the present invention, a flat wire in which conductors extending in the length direction are arranged at required intervals in the width direction, and both surfaces thereof are covered with insulating films. In the harness, a non-conductor portion in which the conductor is not disposed is provided to extend in the lengthwise direction at a middle portion in the width direction thereof, and a pin member is provided to penetrate and lock the non-conductor portion, The flat wire harness is folded back in the lengthwise direction, the non-conductor portion at the start position and the end position of the folded back portion is overlapped, the pin member is penetrated and locked, and the flat wire harness is fixed in the folded back state.
It is intended to provide a telescopic flat wire harness in which the total length of the wire harness is adjusted to a required length.

The pin member is, for example, the flat
A flat wire harness, which is arranged in the width direction of the wire harness and folded back to sandwich the flat wire harness, is provided with a pair of flat plates that engage with each other, and a pin that pierces the non-conductor portion is provided in the middle of one flat plate. At the same time, both ends are provided with pins located on the outer surfaces of both ends in the width direction of the flat wire harness, while the other flat plate is provided with locking holes for inserting and locking the pins.

Alternatively, the pin member has a pin projecting from the center of a disk-shaped flat plate, a slit is formed at the tip of the pin, and the pin is pierced into the non-conductor portion of the flat wire harness, It may be configured such that it is spread to both sides from the protruding tip side and locked to the flat wire harness.

[0010]

In the telescopic flat wire harness of the above structure, when the required length is folded back and the non-conductor portions at the start position and the end position of the folded portion are overlapped and the pin of the pin member is pierced and locked, the flat wire The harness is fixed in a folded state, and the total length of the flat wire harness can be adjusted to the required length.

[0011]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. The flat wire harness 4 is shown in FIG.
As shown in FIG. 2, the conductor 1 is extended in the length direction with a required space in the width direction.
And are covered with 3. In the flat wire harness 4 of the present invention, as shown in FIG. 1, at a substantially central position in the width direction,
A non-conductor portion 9 in which the conductor 1 is not arranged is provided. Since the non-conductor portion 9 does not have the conductor 1, the non-conductor portion 9 has a concave shape from the portion where the conductor 1 exists, and therefore the non-conductor portion 9 has a groove shape.

A pin member is provided to fix the flat wire harness 4 in a folded state. In the first embodiment shown in FIGS. 1 to 3, the pin member is a pair of flat plates 1 mounted in the width direction of the flat wire harness 4.
1 and 12, a pin 11a for penetrating the non-conductor portion is provided at the center of one flat plate 11, and for stoppers arranged on both outer ends in the width direction of the flat wire harness 4 from both sides. The pins 11b and 11b of the above are projected. Spherical locking portions 11c, 11c are provided at the tips of the pins 11b, 11b. The pins 11a, 11b, 11b are set to be longer than the width when two flat wire harnesses 4 are stacked.

The other flat plate 12 has a pin 1 at the center thereof.
A locking hole 12a for inserting the tip of 1a is formed, and locking holes 12b, 12b into which the tip locking portions 11c, 11c of the pins 11b, 11b are press-fitted are formed on both sides.

As shown in FIG. 2, the telescopic flat wire harness having the above-mentioned construction is such that, after the flat wire harness 4 is folded back to a required length in the lengthwise direction, the folding start position P1 and the end position P2 are formed. Is folded and the flat plate 11 is attached to one side of the two layers. The flat plate 11
Pierces the non-conductor portion 9 with the center pin 11a,
The two flat wire harnesses 4 are passed through, while the pins 11b, 11b on both sides are positioned at both ends of the flat wire harness 4 in the width direction.

Next, the flat wire harness 4 is used.
The flat plate 12 is attached from the other end surface of the plate, the pin 11a is inserted into the locking hole 12a at the center of the flat plate 12, and the tip locking parts 11c of the pins 11b, 11b are inserted into the locking holes 12b, 12b on both sides.
11c is press-fitted to protrude and locked to the flat plate 12.

In this state, as shown in FIG. 3, the flat wire harness 4 that is doubly overlapped is the flat plate 11,
It is sandwiched between 12 and the pin 11a of the flat plate 11 is 2
Since it penetrates the heavy flat wire harness 4,
The flat wire harness 4 will not be displaced and will be held in the folded state for the required length.

4 and 5 show the pin member 1 of the second embodiment.
5, the pin member 15 is integrally formed by projecting a pin 15b from the center of a disk-shaped flat plate 15a.
Is provided with a slit 15c from the tip. Pin 15b
Is set longer than the thickness when two flat wire harnesses 4 are stacked.

In the pin member 15 having the above-described structure, the flat wire harness 4 is folded back in the lengthwise direction in the same manner as in the first embodiment, and the non-conductor portion 9 at the folding start position P1 and end position P2 faces each other. Position. After that, the pin 15b is pierced and penetrated into the non-conductive portion 9 of which two sheets are stacked. Then, the pin 15b protruding from the flat wire harness 4 is pushed and spread to both sides from the tip side of the flat wire harness 4 to be bent, and locked in a state along the surface of the flat wire harness 4.

In the fixed state, as shown in FIG. 5, the flat wire harness 4 overlapping two pieces is sandwiched and fixed between the tip bent portion of the pin 15b bent in two directions as described above and the flat plate 15a. Has been done.

In the pin member 15 of the second embodiment, the first member described above is used.
Since the pin 15b is passed through the flat wire harness 4 as in the embodiment, the flat wire harness 4 can be securely fixed without being displaced from each other. Moreover, since it has a simple structure as described above, it can be implemented easily at low cost.

[0021]

As is apparent from the above description, in the telescopic flat wire harness of the present invention, the flat wire harness is folded back in the longitudinal direction, and the pin is penetrated at the start position and the end position of this folding back. As a result, the flat wire harness can be fixed, so that the length of the flat wire harness can be easily adjusted. Therefore, since the flat wire harness does not hang down, it does not interfere with other parts.

Further, since the pins pass through the flat wire harness which is doubly overlapped with each other, they can be securely fixed without being displaced from each other.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a telescopic flat wire harness according to a first embodiment.

FIG. 2 is a perspective view showing a state in which an adjusting member is attached to a flat wire harness.

FIG. 3 is a partial cross-sectional view of FIG.

FIG. 4 is a perspective view showing a pin member of a second embodiment.

FIG. 5 is a cross-sectional view showing how the pin member is attached to the flat wire harness.

FIG. 6 is a perspective view showing a conventional flat wire harness.

7A and 7B are cross-sectional views of a conventional flat wire harness.

[Explanation of symbols]

 4 flat wire harness 9 non-conductor part 10,15 pin member 11 flat plate 11a pin 12 flat plate 15a flat plate 15a pin P1 start position P2 end position

Claims (1)

[Claims] 1. In a flat wire harness in which conductors extending in the length direction are arranged at required intervals in the width direction, and both surfaces thereof are covered with insulating films, the conductor is arranged at an intermediate portion in the width direction. The non-conductor portion which is not provided is provided by extending in the lengthwise direction, and a pin member which penetrates and locks the nonconductor portion is provided, and the flat wire harness is folded back in the lengthwise direction,
The total length of the flat wire harness is adjusted to a required length by stacking the non-conductor portions at the start position and the end position of the folded-back portion, penetrating and locking the pin member, and fixing in the folded-back state. Telescopic flat wire harness featuring.