CN105702375A - Shielding cable - Google Patents
Shielding cable Download PDFInfo
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- CN105702375A CN105702375A CN201510920641.3A CN201510920641A CN105702375A CN 105702375 A CN105702375 A CN 105702375A CN 201510920641 A CN201510920641 A CN 201510920641A CN 105702375 A CN105702375 A CN 105702375A
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- holding wire
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/02—Cables with twisted pairs or quads
- H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
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Abstract
The present invention provides a shielding cable of which specified characteristic impedance can be obtained. A shielding cable (1) includes: two signal lines, each signal line being formed by wrapping a signal conductor (2) by using an insulator (3); and a shielding conductor (6) spirally winding a band (5) with a metal foil intensively at the periphery of the two signal lines (4). The insulator is configured that the cross section can be deformed by external force, and pickup rates of the signal lines when 1kg load is applied to the signal lines for 30 minutes are greater than or equal to 80% and less than or equal to 95%. The metal foil is configured that an outer side or an inner side is retraced by preferably selecting an edge portion of one side of the band with the metal foil, so that up and down metal foils are in electrical contact with each other at winding overlapped portions of the band with the metal foil.
Description
Technical field
The present invention relates to a kind of shielded cable, specifically the shielded cable possessing holding wire and shielded conductor is related to, 2 signal conductors are utilized insulator cladding to form by this holding wire, and this shielded conductor is intensively spirally to wind the band with metal forming around holding wire。
Background technology
Many such as 2 holding wires are used as the shielded cable of a pair to transmit digital signal in differential transfer mode。This differential transfer mode by such as the signal of 180 degree sends to 1 pair of holding wire input by phasing back simultaneously, can carry out difference synthesis receiving side such that it is able to make signal be output into 2 times。It addition, apply equably to 1 pair of holding wire at the noise signal being subject to from the transmission path sent to receiving。Therefore, it is possible to eliminate when receiving side and exporting as differential signal, and remove noise。
Above-mentioned 1 pair of holding wire utilizes metal forming to shield, but merely with metal forming, intensity is insufficient, therefore such as uses the band with metal forming that metal forming carries out paste to resinous band。On the other hand, if, with the spirally overlapping winding of the band with metal forming, then the lap being with will not electrically contact, and therefore sometimes absorbs (suck-out) phenomenon (signal attenuation sharply increases) in high-frequency region。It is thus possible, for instance in patent documentation 1, disclose the metal forming making lap in the technology being electrical contact with each other up and down。
Patent documentation 1: Japanese Unexamined Patent Publication 2011-222262 publication
In above-mentioned shielded cable, in order to obtain good signal transfer characteristic in using frequency domain, it is set with characteristic impedance。This characteristic impedance changes along with the deformation in the cross section of holding wire。In above-mentioned patent documentation 1, for the relation between change and the deformation of holding wire of characteristic impedance, it does not have disclose any content。
Summary of the invention
The present invention proposes in view of practical situation described above, its object is to provide the shielded cable of a kind of characteristic impedance that can obtain regulation。
The shielded cable that one mode of the present invention relates to, it possesses: 2 holding wires, and signal conductor is utilized insulator cladding to form by this holding wire；And shielded conductor, it is intensively spirally to be wound by the band with metal forming around these 2 holding wires, in described shielded cable, described insulator is configured to, cross section can be deformed by external force, to described holding wire with 30 minutes apply 1kg load time this holding wire pressure more than rate more than or equal to 80% less than or equal to 95%。
The effect of invention
According to above-mentioned, it is possible to obtain the characteristic impedance of regulation。
Accompanying drawing explanation
Figure 1A is the figure of the outline of the shielded cable illustrating that a mode of the present invention relates to。
Figure 1B is the figure of the shielded conductor that Figure 1A is described。
Fig. 2 A indicates that the figure of the result (spacing is more than 4.0mm) of the signal attenuation of the shielded cable of Figure 1A。
Fig. 2 B indicates that the figure of the result (spacing is 4.0mm) of the signal attenuation of the shielded cable of Figure 1A。
Fig. 2 C indicates that the figure of the result (spacing is 2.5mm) of the signal attenuation of the shielded cable of Figure 1A。
Fig. 2 D indicates that the figure of the result (spacing is 2.0mm) of the signal attenuation of the shielded cable of Figure 1A。
Fig. 3 is the figure of the variation of the holding wire that Figure 1A is described。
Fig. 4 A is the figure of the form of the holding wire that Figure 1A is described。
Fig. 4 B is the figure of the relation between change and the deformation of holding wire of the characteristic impedance of the holding wire that Figure 1A is described。
Fig. 5 A is the figure of the holding wire that embodiment 2 is described。
Fig. 5 B is the figure of the relation between change and the deformation of holding wire of the characteristic impedance of the holding wire that embodiment 2 is described。
Fig. 6 A is the figure of the holding wire that embodiment 3 is described。
Fig. 6 B is the figure of the relation between change and the deformation of holding wire of the characteristic impedance of the holding wire that embodiment 3 is described。
Fig. 7 A is the figure of the outline of other examples of the shielded cable illustrating that a mode of the present invention relates to。
Fig. 7 B is the figure of the shielded conductor that Fig. 7 A is described。
Fig. 8 is the figure of the shielded conductor of other examples another of the shielded cable illustrating that a mode of the present invention relates to。
The explanation of label
1 ... shielded cable, 2 ... signal conductor, 3 ... insulator, 3a ... outer layer, 3b ... main stor(e)y, 3c ... internal layer, 4 ... holding wire, 5 ... with the band of metal forming, 5a ... metal forming, 5b ... resin strip, 6 ... shielded conductor, 6a ... reflex part, 7 ... crust, 8 ... drain wire, 10 ... metallic plate。
Detailed description of the invention
The explanation > of < embodiments of the present invention
First, the content of embodiments of the present invention enumerated and illustrate。
The shielded cable involved by one mode of the present invention, (1) possesses: 2 holding wires, and signal conductor is utilized insulator cladding to form by this holding wire；And shielded conductor, it is intensively spirally to be wound by the band with metal forming around these 2 holding wires, in described shielded cable, described insulator is configured to, cross section can be deformed by external force, to described holding wire with 30 minutes apply 1kg load time this holding wire pressure more than rate more than or equal to 80% less than or equal to 95%。More than the pressure of the holding wire of the section deformation amplitude of expression holding wire, rate is more than or equal to 80% less than or equal to 95%, and therefore the characteristic impedance of cable does not deviate by design load。It is as a result, it is possible to prevent from using the at random of signal waveform in frequency domain。Additionally, rate refers to more than the pressure of holding wire, for instance the value that the diameter in the conquassation direction of the holding wire after deformation when insulator is applied with external force is obtained divided by the diameter of holding wire before deformation。
(2) metal forming is set to outside or outside and turns back by the edge part of the side of the described band with metal forming, thus at the roll overlap part place of the described band with metal forming, upper and lower metal forming is electrical contact with each other。Owing to bucking current and holding wire flow with linearity abreast, therefore, it is possible to reduce absorbing phenomenon。
(3) described insulator is formed by 1 layer, is foaming layer。In this case, the manufacture of holding wire becomes easy。
(4) described insulator is formed by 2 layers, and outer layer is solid layer, and internal layer is foaming layer。The outer layer that main conquassation is higher than internal layer hardness, therefore compared with the situation of the material that conquassation is easily deformed, it is difficult to conquassation, it is possible to is readily derived rate more than the pressure of regulation。
(5) described insulator is formed by 3 layers, and outermost layer and innermost layer are solid layer, and the layer of between which is foaming layer。The outer layer that main conquassation hardness is the highest among three layers, therefore compared with the situation of the material that conquassation is easily deformed, it is difficult to conquassation, it is possible to is readily derived rate more than the pressure of regulation。
(6) winding spacing of the described band with metal forming more than or equal to 2.0mm less than or equal to 4.0mm。In this case, it is possible to prevent the productivity of cable from reducing, and absorbing phenomenon can be eliminated。It is further preferred that the winding spacing of (7) described band with metal forming more than or equal to 2.0mm less than or equal to 2.5mm。
(8) possesses the pressing winding unit spirally wound around the described band with metal forming。The band with metal forming can be protected。It addition, when the metal forming of reflex part is arranged in the inner side of winding, metal forming is arranged in the outside that winding is overall, therefore it is capable of the insulation of metal forming by pressing winding unit。
(9) possesses the crust applied around the described band with metal forming。Can providing following shielded cable, it is capable of the insulation of the band with metal forming, and is prevented from, from outside pollution, additionally having resistance to water。
The detailed content > of < embodiments of the present invention
With reference to the accompanying drawings, embodiments of the present invention are explained。Figure 1A, Figure 1B are the figure of the outline of the shielded cable illustrating that a mode of the present invention relates to。Shielded cable 1 shown in Figure 1A is such as twin shaft cable, by become 2 parallel in the way of make holding wire contact and on the holding wire 4 of double-core parallel arranged side by side, be spirally wound with the band 5 with metal forming。
Signal conductor 2 is utilized insulator 3 to be coated with and is formed by holding wire 4。Signal conductor 2 such as utilize the electricity of copper or aluminum etc. good conductor or tin plating or silver-plated after the single line of good conductor of electricity, or twisted wire stranded for the good conductor of electricity is formed, uses the wire rod being equivalent to AWG20～36 (external diameter of conductor is 0.115mm～0.910mm)。Insulator 3 uses the material that dielectric constant is little, for instance use polyethylene (PE), ethylene vinyl acetate copolymer (EVA), fluororesin etc.。Alternatively, it is also possible to use foamed insulation resin。The external diameter of holding wire 4 is 3.0mm～0.15mm, when such as employing signal conductor 2 of AWG26, becomes about 1.25mm。
2 holding wires 4 are covered by shielded conductor 6。Specifically, shielded conductor 6 is will to be formed with spirally winding with 5 of metal forming, intensively shielded by 2 holding wires 4。
As shown in Figure 1B, being that the metal forming 5a of copper or aluminum etc. is pasted on the resin strip 5b of polyethylene terephthalate (PET) etc. with 5 and formed with metal forming。In addition, the thickness of metal forming 5a is 3 μm～30 μm, and (situation of preferred copper is 6～10 μm, such as 8 μm), the thickness of resin strip 5b is 3 μm～50 μm, and (situation of preferred PET is 3～10 μm, such as 4 μm), with metal forming with 5 thickness become 6 μm～80 μm。
Crust 7 can also be utilized to be coated with shielded conductor 6。In this case, the thermoplastic resin extrusion moldings such as polyethylene, polrvinyl chloride, fluororesin are such as arranged by crust 7。In addition it is also possible to wind resin strip and arrange。By arranging crust 7 such that it is able to provide following cable, this cable be capable of with metal forming with 5 insulation, and prevent, from outside pollution, additionally there is resistance to water。
Here, with metal forming with 5 relative to the axle orthogonal with length of cable direction, with such as 8 °～70 ° overlapping windings, at the part place of roll overlap, the metal forming 5a of downside and upside is electrical contact with each other。
Specifically, as shown in Figure 1B, it is formed with reflex part 6a at the edge part with the side of 5 with metal forming, the metal forming 5a of this reflex part 6a is arranged in the outside of winding。Therefore, with metal forming be arranged in inner side with 5 metal forming 5a outside reflex part 6a in the way of, be wound on the periphery of holding wire 4。Now, at the metal forming 5a place of reflex part 6a next circle overlapping at the metal forming 5a not having the edge part of reflex part 6a to arrange, the metal forming 5a of the upper side and lower side is electrical contact with each other。Thus, bucking current and holding wire 4 flow with linearity abreast, therefore, it is possible to reduce absorbing phenomenon。
The width L of reflex part 6a be preferably set to metal forming with 5 winding width W about 1/4～2/3, be more preferably set to about 1/4～1/2。Such as, in the band 5 with metal forming of 7mm width, the width L of reflex part 6a is turned back with 2mm, the winding width W with 5 is set to 5mm。
It addition, if the width L of reflex part 6a is little, then the conducting of the metal forming 5a of office, overlapping portion is insufficient sometimes, if but the width L of reflex part 6a is excessive, then and can waste the band 5 with metal forming, winding sometimes also can be made fluffy and disorderly。Therefore, the width of roll overlap part is preferably about the 1/4～5/4 of width L, more preferably degree roughly the same with the width L of reflex part 6a。Such as, when the width L of reflex part 6a is 2mm, the width of roll overlap part is set to 2mm～2.3mm and is wound。
In addition it is also possible to the metal forming of reflex part to be arranged in the inner side of winding。In this case, with the band of metal forming in the way of making the metal forming outside reflex part be arranged in outside, it is arranged in the periphery of holding wire。
Alternatively, it is also possible to by with metal forming with 5 surrounding spirally wind with winding pressing component (omit diagram)。Pressing winding unit is such as the resin strip of PET etc., it is possible to protect the band 5 with metal forming。Additionally, when the metal forming 5a of reflex part 6a being arranged in the inner side of winding, with metal forming with 5 in the way of making the metal forming 5a outside reflex part 6a be arranged in outside, be wound on the periphery of holding wire 4, be therefore capable of the insulation of metal forming 5a by pressing winding unit。
Fig. 2 A～Fig. 2 D indicates that the figure of the result of the signal attenuation of the shielded cable of Figure 1A。
When the winding spacing P of the band with metal forming shown in Figure 1B is more than 4.0mm, as shown in Figure 2 A, absorbing phenomenon occurring at 25GHz～30GHz place, signal level declines。On the other hand, when the winding spacing P of the band with metal forming is 4.0mm, as shown in Figure 2 B, the decay of absorption reduces。In the frequency of the signal being transmitted lower than, in the purposes of 25GHz, could be used that the shielded cable of the present invention that the winding spacing of the band with metal forming is 4.0mm。When the situation that winding spacing P is 2.5mm of the band with metal forming and this winding spacing P are 2.0mm, less than or equal in the frequency range of 40GHz, it does not have absorbing phenomenon (Fig. 2 C and Fig. 2 D) occurs。If making winding spacing diminish, then cable is difficult to bend, and the amount with the band of metal forming being wound increases, and the productivity of cable declines。If being smaller than 2.0mm, then cannot ignore these drawbacks, it is thus preferred to the winding spacing P with the band of metal forming is set to more than or equal to 2.0mm less than or equal to 4.0mm, it is preferred that be set to more than or equal to 2.0mm less than or equal to 2.5mm。
Above-mentioned holding wire 4 can be deformed by external force。Specifically, as shown in Figure 3, for instance clip the holding wire 4 of cross section toroidal with 2 metallic plates 10, pressurizeed from the direction (above-below direction of such as Fig. 2) orthogonal with the length direction of holding wire 4。This pressurization is such as that the weight of 1Kg is continuously applied 30 minutes。
Thus, insulator 3 deforms, and forms flat in the periphery of holding wire 4 respectively at the abutted position place with metallic plate 10。After stopping pressurization, this flat is without recovery, and insulator 3 maintains the state after deformation。
The shielded cable 1 illustrated in figure ia after having and as above being arranged 2 by the holding wire 4 of the cross section toroidal of the character of conquassation, intensively will shield with the band 5 with metal forming as described above and manufactured。
Fig. 4 A, Fig. 4 B are the figure of the form of the holding wire that Figure 1A is described。These figure represent the holding wire of embodiment 1。Insulator 3 shown in Fig. 4 A is only formed with 1 layer by by Low Density Polyethylene (LDPE) and the mixed main stor(e)y 3b of high density polyethylene (HDPE) (HDPE), it addition, main stor(e)y 3b is the foamed insulation resin of foam degrees and the bubble diameter with regulation。Insulator has cross-linked。
The holding wire 4 of cable 1 is taken out, measures the diameter before and after pressurization, rate more than the pressure of signal calculated line respectively, derive the relation (Fig. 4 B) between change and the deformation of holding wire of characteristic impedance。
The holding wire of sample 1 is the insulator cladding of the thickness 0.243mm that the signal conductor of AWG30 (φ 0.254mm) utilizes main stor(e)y 3b。Additionally, the foam degrees of this main stor(e)y 3b (volume ratio of the frothing part in foaming layer) is 45.5～50.3%, bubble diameter is 20～70 μm。
In sample 1, the diameter of the holding wire before deformation is 0.74mm, on the other hand, the diameter (distance between the flat that such as the abutted position place at metallic plate 10 shown in Fig. 3 is formed) of the holding wire after deformation is 0.65mm, and the remaining rate of pressure is 88%。The characteristic impedance of the cable employing sample 1 is converged within 5% relative to design load (100 Ω), obtains good evaluation。
The holding wire of sample 2 is the insulator cladding of the thickness 0.324mm that the signal conductor of AWG28 (φ 0.352mm) utilizes main stor(e)y 3b。Additionally, the foam degrees of this main stor(e)y 3b is 48.0～56.2%, bubble diameter is 20～70 μm。
In sample 2, the diameter of the holding wire before deformation is 1mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.8mm, and the remaining rate of pressure is 80%。The characteristic impedance employing the cable of sample 2 is also good。
The holding wire of sample 3 is the insulator cladding of the thickness 0.403mm that the signal conductor of AWG26 (φ 0.445mm) utilizes main stor(e)y 3b。Additionally, the foam degrees of this main stor(e)y 3b is 49.0～58.8%, bubble diameter is 20～70 μm。
In sample 3, the diameter of the holding wire before deformation is about 1.25mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.9mm, and the remaining rate of pressure is 72%。The characteristic impedance employing the cable of sample 3 deviates more than relative to design load (100 Ω) or equal to 5%, could not obtain good evaluation。
The holding wire of sample 4 is the insulator cladding of the thickness 0.514mm that the signal conductor of AWG24 (φ 0.562mm) utilizes main stor(e)y 3b。Additionally, the foam degrees of this main stor(e)y 3b is 53.7～56.6%, bubble diameter is 20～70 μm。
In sample 4, the diameter of the holding wire before deformation is 1.59mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 1.17mm, and the remaining rate of pressure is 74%。The characteristic impedance employing the cable of sample 4 deviates more than relative to design load (100 Ω) or equal to 5%, could not obtain good evaluation。
As mentioned above it can be seen that when by holding wire conquassation, when the remaining rate of pressure is less than 80%, due to the deformation in the cross section of holding wire, make the characteristic impedance of cable deviate from design load, it is impossible to obtain the characteristic impedance of regulation。Being additionally, since this reason makes insertion loss worsen。It addition, when the remaining rate of pressure is less than 80%, cause the bad order of holding wire。
Fig. 5 A, Fig. 5 B are the figure of the holding wire that embodiment 2 is described。
Insulator 3 shown in Fig. 5 A is by the outer layer 3a of HDPE and is formed by mixed for LDPE and HDPE main stor(e)y 3b these 2 layers。Outer layer 3a is solid layer, and main stor(e)y 3b is foamed insulation resin。Owing to outer layer is solid layer, therefore the abrasion performance of holding wire well and easily installs screen layer。In the same manner as above-described embodiment 1, it is derived the relation (Fig. 5 B) between the change of characteristic impedance and the deformation of holding wire。
The holding wire of sample 5 is the insulator cladding of the thickness 0.08mm that the signal conductor of AWG30 (φ 0.254mm) utilizes the thickness 0.163mm of main stor(e)y 3b, outer layer。Additionally, the foam degrees of this main stor(e)y 3b is 45.5～50.3%, bubble diameter is 20～70 μm。
In sample 5, the diameter of the holding wire before deformation is 0.74mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.69mm, and the remaining rate of pressure is 93%。The characteristic impedance of the cable employing sample 5 is converged within 5% relative to design load (100 Ω), obtains good evaluation。
The holding wire of sample 6 is the insulator cladding of the thickness 0.08mm that the signal conductor of AWG28 (φ 0.352mm) utilizes the thickness 0.244mm of main stor(e)y 3b, outer layer。Additionally, the foam degrees of this main stor(e)y 3b is 48.0～56.2%, bubble diameter is 20～70 μm。
In sample 6, the diameter of the holding wire before deformation is 1mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.84mm, and the remaining rate of pressure is 84%。The characteristic impedance employing the cable of sample 6 is also good。
The holding wire of sample 7 is the insulator cladding of the thickness 0.1mm that the signal conductor of AWG26 (φ 0.445mm) utilizes the thickness 0.303mm of main stor(e)y 3b, outer layer。Additionally, the foam degrees of this main stor(e)y 3b is 49.0～58.8%, bubble diameter is 20～70 μm。
In sample 7, the diameter of the holding wire before deformation is about 1.25mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 1mm, and the remaining rate of pressure is 80%。The characteristic impedance employing the cable of sample 7 is also good。
The holding wire of sample 8 is the insulator cladding of the thickness 0.1mm that the signal conductor of AWG24 (φ 0.562mm) utilizes the thickness 0.414mm of main stor(e)y 3b, outer layer。Additionally, the foam degrees of this main stor(e)y 3b is 53.7～56.6%, bubble diameter is 20～70 μm。
In sample 8, the diameter of the holding wire before deformation is 1.59mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 1.27mm, and the remaining rate of pressure is 80%。The characteristic impedance employing the cable of sample 8 is also good。
Fig. 6 A, Fig. 6 B are the figure of the holding wire that embodiment 3 is described。
Insulator 3 shown in Fig. 6 A is by the outer layer 3a of HDPE, formed the internal layer 3c these 3 layers of mixed for LDPE and HDPE main stor(e)y 3b and LDPE。Outer layer 3a and internal layer 3c is solid layer, and main stor(e)y 3b is foamed insulation resin。And, in the same manner as above-described embodiment 1,2, it is derived the relation (Fig. 6 B) between the change of characteristic impedance and the deformation of holding wire。
The holding wire of sample 9 is the insulator cladding of the thickness 0.08mm that the signal conductor of AWG30 (φ 0.254mm) utilizes the thickness 0.02mm of internal layer 3c, the thickness 0.143mm of main stor(e)y 3b, outer layer 3a。Additionally, the foam degrees of this main stor(e)y 3b is 45.5～50.3%, bubble diameter is 20～70 μm。
In sample 9, the diameter of the holding wire before deformation is 0.74mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.7mm, and the remaining rate of pressure is 95%。The characteristic impedance employing the cable of sample 9 is also good。
The holding wire of sample 10 is the insulator cladding of the thickness 0.08mm that the signal conductor of AWG28 (φ 0.352mm) utilizes the thickness 0.02mm of internal layer 3c, the thickness 0.224mm of main stor(e)y 3b, outer layer 3a。Additionally, the foam degrees of this main stor(e)y 3b is 48.0～56.2%, bubble diameter is 20～70 μm。
In sample 10, the diameter of the holding wire before deformation is 1mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 0.85mm, and the remaining rate of pressure is 85%。The characteristic impedance employing the cable of sample 10 is also good。
The holding wire of sample 11 is the insulator cladding of the thickness 0.1mm that the signal conductor of AWG26 (φ 0.445mm) utilizes the thickness 0.02mm of internal layer 3c, the thickness 0.283mm of main stor(e)y 3b, outer layer 3a。Additionally, the foam degrees of this main stor(e)y 3b is 49.0～58.8%, bubble diameter is 20～70 μm。
In sample 11, the diameter of the holding wire before deformation is about 1.25mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 1mm, and the remaining rate of pressure is 80%。The characteristic impedance employing the cable of sample 11 is also good。
The holding wire of sample 12 is the insulator cladding of the thickness 0.1mm that the signal conductor of AWG24 (φ 0.562mm) utilizes the thickness 0.02mm of internal layer 3c, the thickness 0.394mm of main stor(e)y 3b, outer layer 3a。Additionally, the foam degrees of this main stor(e)y 3b is 53.7～56.6%, bubble diameter is 20～70 μm。
In sample 12, the diameter of the holding wire before deformation is 1.59mm, and on the other hand, the diameter (distance between above-mentioned flat) of the holding wire after deformation is 1.27mm, and the remaining rate of pressure is 80%。The characteristic impedance employing the cable of sample 12 is also good。
On the other hand, it is known that, if the remaining rate of pressure is more than 95%, then will not produce the bad order of holding wire, but the characteristic impedance of cable is from design load to the direction deviation reduced, it is impossible to obtain the characteristic impedance of regulation。
Additionally, in the holding wire 4 shown in Fig. 4 A and Fig. 5 A, when the remaining rate of pressure is more than 95%, obtain the result same with the holding wire 4 shown in Fig. 6 A。It addition, in the holding wire 4 shown in Fig. 5 A and Fig. 6 A, when the remaining rate of pressure is less than 80%, obtain the result same with the holding wire 4 shown in Fig. 4 A。
Therefore, in the way of to make the remaining rate of pressure of holding wire become more than or equal to 80% less than or equal to 95% when applying external force, the material of insulator, foam degrees etc. are determined。Above-mentioned section deformation amplitude gives will not from the characteristic impedance of the cable of design load deviation。It is as a result, it is possible to prevent from using the at random of signal waveform in frequency domain。
It addition, in the double-core parallel cable being arranged in parallel by 2 holding wires and entirety has been shielded, signal level smoothly declines, it does not have absorbing phenomenon occurs。It addition, with rate more than above-mentioned pressure less than 80% or more than 95% when the double-core parallel cable that formed of holding wire compared with, it is possible to less than or equal to 9psec/m degree, to reduce the time delay of the signal propagated in each core of this cable。
Fig. 7 A, Fig. 7 B are the figure of the outline of other examples of the shielded cable illustrating that a mode of the present invention relates to。
As shown in Figure 7 A, in this shielded cable 1, drain wire 8 is placed in the recess (groove) that holding wire 4 is formed side by side and together with holding wire 4 and is wound by shielded conductor 6。In this case, as shown in Figure 7 B, it is formed with reflex part 6a at the edge part with the side of 5 with metal forming, the metal forming 5a of this reflex part 6a is arranged in the outside (identical with Figure 1B) of winding。Therefore, with metal forming with 5 in the way of making the metal forming 5a outside reflex part 6a be arranged in inner side, wind in the periphery of holding wire 4。Now, at the metal forming 5a place of reflex part 6a next circle overlapping at the metal forming 5a not having the edge part of reflex part 6a to arrange, the metal forming 5a of the upper side and lower side is electrical contact with each other。Metal forming 5a also turns on drain wire 8。
As shown in Figure 8, the width L of reflex part can be set to longer than the width O of lap。In this case, drain wire can be only fitted to the outside of shielded conductor。The exposed division 5c of the metal forming 5a in reflex part can with the drain wire conducting in the outside being arranged in shielded conductor。
This time disclosed embodiment is all illustrate in all respects, it is thus understood that be not restrictive content。The scope of the present invention is not foregoing, and is illustrated by claims, represents and comprises and all of change in claims equivalents and claims。
Claims (10)
1. a shielded cable, it possesses: 2 holding wires, and signal conductor is utilized insulator cladding to form by this holding wire；And shielded conductor, it is intensively spirally to be wound by the band with metal forming around these 2 holding wires,
In described shielded cable,
Described insulator is configured to, and cross section can be deformed by external force, to described holding wire with 30 minutes apply 1kg load time this holding wire pressure more than rate more than or equal to 80% less than or equal to 95%。
2. shielded cable according to claim 1, wherein,
Metal forming is set to outside or outside and turns back by the edge part of the side of the described band with metal forming, thus at the roll overlap part place of the described band with metal forming, upper and lower metal forming is electrical contact with each other。
3. shielded cable according to claim 1 and 2, wherein,
Described insulator is formed by 1 layer, is foaming layer。
4. shielded cable according to claim 1 and 2, wherein,
Described insulator is formed by 2 layers, and outer layer is solid layer, and internal layer is foaming layer。
5. shielded cable according to claim 1 and 2, wherein,
Described insulator is formed by 3 layers, and outermost layer and innermost layer are solid layer, and the layer of between which is foaming layer。
6. shielded cable according to claim 1 and 2, wherein,
The winding spacing of the described band with metal forming more than or equal to 2.0mm less than or equal to 4.0mm。
7. shielded cable according to claim 1 and 2, wherein,
The winding spacing of the described band with metal forming more than or equal to 3.5mm less than or equal to 4.0mm。
8. shielded cable according to claim 6, wherein,
The winding spacing of the described band with metal forming more than or equal to 2.0mm less than or equal to 2.5mm。
9. shielded cable according to claim 1 and 2, wherein,
Possessing pressing winding unit, this pressing winding unit spirally winds around the described band with metal forming。
10. shielded cable according to claim 1 and 2, wherein,
Possessing crust, this crust is applied to around the described band with metal forming。
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014251963 | 2014-12-12 | ||
| JP2014-251963 | 2014-12-12 | ||
| JP2015-230289 | 2015-11-26 | ||
| JP2015230289A JP2016115668A (en) | 2014-12-12 | 2015-11-26 | Shield cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105702375A true CN105702375A (en) | 2016-06-22 |
| CN105702375B CN105702375B (en) | 2018-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510920641.3A Expired - Fee Related CN105702375B (en) | 2014-12-12 | 2015-12-11 | Shielded cable |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2016115668A (en) |
| CN (1) | CN105702375B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111489862A (en) * | 2019-01-29 | 2020-08-04 | 日立金属株式会社 | Communication cable |
| US10910585B2 (en) | 2017-11-28 | 2021-02-02 | Lg Display Co., Ltd. | OLED lighting apparatus having a double layered electrode |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624813A (en) * | 2004-12-21 | 2005-06-08 | 江苏东强股份有限公司 | High-speed data cable |
| CN2729870Y (en) * | 2004-09-30 | 2005-09-28 | 西安西电光电缆有限责任公司 | Railway digital signal cable with internal shielding layer |
| JP2011222262A (en) * | 2010-04-08 | 2011-11-04 | Sumitomo Electric Ind Ltd | Shield cable |
| CN202584914U (en) * | 2010-12-21 | 2012-12-05 | 日立电线株式会社 | Differential signal cable |
| CN203521039U (en) * | 2013-10-12 | 2014-04-02 | 天津市万博线缆有限公司 | Vehicle-mounted bridge-crossing-data communication cable |
-
2015
- 2015-11-26 JP JP2015230289A patent/JP2016115668A/en active Pending
- 2015-12-11 CN CN201510920641.3A patent/CN105702375B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729870Y (en) * | 2004-09-30 | 2005-09-28 | 西安西电光电缆有限责任公司 | Railway digital signal cable with internal shielding layer |
| CN1624813A (en) * | 2004-12-21 | 2005-06-08 | 江苏东强股份有限公司 | High-speed data cable |
| JP2011222262A (en) * | 2010-04-08 | 2011-11-04 | Sumitomo Electric Ind Ltd | Shield cable |
| CN102237156A (en) * | 2010-04-08 | 2011-11-09 | 住友电气工业株式会社 | Shielded cable |
| CN202584914U (en) * | 2010-12-21 | 2012-12-05 | 日立电线株式会社 | Differential signal cable |
| CN203521039U (en) * | 2013-10-12 | 2014-04-02 | 天津市万博线缆有限公司 | Vehicle-mounted bridge-crossing-data communication cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10910585B2 (en) | 2017-11-28 | 2021-02-02 | Lg Display Co., Ltd. | OLED lighting apparatus having a double layered electrode |
| CN111489862A (en) * | 2019-01-29 | 2020-08-04 | 日立金属株式会社 | Communication cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016115668A (en) | 2016-06-23 |
| CN105702375B (en) | 2018-04-17 |
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