CN1244020A

CN1244020A - Multi-layer flat electric cable

Info

Publication number: CN1244020A
Application number: CN 99111624
Authority: CN
Inventors: 约尔马·波赫约拉
Original assignee: IWS International Oy
Current assignee: IWS International Oy
Priority date: 1998-08-04
Filing date: 1999-08-04
Publication date: 2000-02-09
Also published as: BR9903419A; EP0978850A3; FI981697A0; JP2000057856A; PL334766A1; CA2279578A1; EP0978850A2; FI981697A

Abstract

The present invention relates to a multilayer flat cable, comprising a continuous strip of thin sheet. The strip of thin sheet is provided with folding zones extending lengthwise thereof, at which the strip of thin sheet is bent for the multilayer cable. In line with the folding zones are weakenings extending lengthwise of the cable.

Description

Multi-layer flat electric cable

The present invention relates to a kind of multi-layer flat electric cable as type as described in claim 1 preamble.

Known multi-layer flat electric cable comprises a continuous thin slice band at present, and it is converted into multi-layer flat electric cable as shown in Figure 1.Be positioned at the bending that the fold domain on this cable side is tending towards resisting cable.Sharp-pointed bending makes this cable break in its fold domain easily, and this will cause the breaking of plastic coating of cable.In addition, when in breakdown point generation sharp bend, this cable will have a discontinuous crooked arch.

An object of the present invention is to provide a kind of multi-layer flat electric cable, more easily bending and fold domain are more durable for it.

These purposes utilize the described multi-layer cable assembly of claim 1 to be achieved.

Dependent claims discloses most preferred embodiment of the present invention.

Referring now to accompanying drawing the present invention is described.Wherein:

Fig. 1 has shown a root multi-layer flat cable;

Fig. 2 has shown a thin slice band according to first embodiment;

Fig. 3 has shown the axonometric drawing according to the thin slice band of second embodiment of the invention; With

Fig. 4 has shown the sectional view according to the cable of third embodiment of the invention.

Cable 1 is made by a continuous thin slice band 1a, and its material is preferably copper.Apply one deck insulating material (not shown) on the multi-layer cable that makes, this material preferably includes common plastics as the conductor insulation material.

Fig. 2 has shown longitudinal folding regional A, B, the C of thin slice band 1a, and in an illustrated embodiment, its number is three, but number that should the zone can be between one to five.Make thin slice band 1a pleating to form multi-layer flat electric cable shown in Figure 1 at fold domain A, B, C place.The height H of this multi-layer flat electric cable approximately is four times of material thickness of thin slice 1a, and width approximately is 1/4 of a thin slice 1a width.

Before being folded into final form, the thin slice band 1a among Fig. 2 forms along the thin slice band weakening portion 2 that extends longitudinally through machine work at fold domain A, B, C place, and the lengthening weakening portion in the present embodiment comprises the continuous notch of the lengthening that runs through thin slice band 1a.The notch 2 that is positioned at each fold domain A, B, C thin slice band 1a transversely can be concordant each other or at various height on staggered.Notch 2 also can be the continuous circular hole that is essentially, shown in the notch among the B of fold domain.Remain with connecting portion 3 between the continuous notch 2 in same regional A, B, C, the width of this connecting portion on thin slice band 1a is vertical between the 1mm, is preferably 0.5mm at 0.3mm.

Remove material from fold domain A, B, C and help thin slice band 1a is folded into multi-layer cable 1, and connecting portion 3 still to keep cable 1 be a complete element.The material internal stress that breaks at fold domain A, B, C place of will causing of in folding generation has been eliminated or has greatly been reduced usually in the removal of material, thereby helps the durability of cable.

(thickness of thin slice band 1a with respect to width done exaggerative) in the embodiment shown in fig. 3, weakening portion 2 comprise along cable 1 vertically and with each fold domain A, B, consistent continuous recess or the groove of C.This recess or groove 2 can obtain by removal or dislocation material.This flaky material has reduced 30-90% at the thickness at recess or groove place than raw material thickness.This thin slice band 1a each weakening portion 2 place according to shown in curve arrow be folded into multi-layer cable shown in Figure 11.The benefit that recess 2 brings for cable 1 is identical with previous embodiment.

The removal of material or dislocation also can carry out after folding, and weakening portion 2 wherein shown in Figure 4 is processed to concordant each other by grinding or equivalent technologies, reduced the material thickness at weakening portion 2a place simultaneously.Thickness after reducing can be the 70-10% of original thickness.This embodiment provides an improved rupture strength for the 2a of weakening portion.

Obviously, if desired, the foregoing description can be combined in the cable 1.

Claims

1. a multi-layer flat electric cable (1), comprise a continuous thin slice band (1a), described thin slice band (1a) is provided with fold domain (A, B, C) longitudinally, thin slice band (1a) is folded into multi-layer cable (1) in this zone, it is characterized in that fold domain (A, B, C) locates to be provided with weakening portion along the longitudinal extension of cable (1) (2,2a).

2. cable as claimed in claim 1 (1) is characterized in that, weakening portion (2) be included in thin slice band (1a) folding before, along its lengthening notch that vertically processes.

3. cable as claimed in claim 1 or 2 (1) is characterized in that, remains with connecting portion (3) between vertically continuous notch (2).

4. cable as claimed in claim 1 (1) is characterized in that, weakening portion (2) comprises along the vertical of cable (1) and is positioned at recess or the groove that fold domain (A, B, C) is located.

5. cable as claimed in claim 1 (1) is characterized in that, thin slice band (1a) have weakening portion (2a) locate thickness be significantly less than thin slice band (1a) go up other parts thickness attenuate material thickness.