CN101110283A - Coaxial cable and multi-core coaxial cable - Google Patents
Coaxial cable and multi-core coaxial cable Download PDFInfo
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- CN101110283A CN101110283A CNA2006101061807A CN200610106180A CN101110283A CN 101110283 A CN101110283 A CN 101110283A CN A2006101061807 A CNA2006101061807 A CN A2006101061807A CN 200610106180 A CN200610106180 A CN 200610106180A CN 101110283 A CN101110283 A CN 101110283A
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Abstract
The invention relates to a coaxial cable and multiple-core coaxial cable, which comprises an insulation layer with air layer and low dielectric constant. The invention is able to slim the external diameter and ensure excellent bending performance, so as to improve the productivity. In the invention, a lead line that forms an internal conductor is stranded with a core wire made of electrically insulated resin; the external side of it is covered with tube shape insulator, so that the insulator can respectively connects to the lead line and the core wire; an external conductor is arranged at the external circumference of the insulator. Besides, a plurality of coaxial cables in the invention is covered by a public shuck made of insulation materials.
Description
Technical field
The coaxial cable and the multicore coaxial cable that the present invention relates to be applicable to the display of notebook computer, mobile phone, diagnostic ultrasound equipment, endoscope, CCD camera or have the equipment of camera head.
Background technology
In recent years, in these equipment, not only require small-sized, lightweight, the high speed, the high capacity that also require data to transmit.And, in these equipment, need to suppress owing between signal, produce electromagnetic interference (EMI:Electromagnetic interference) from the electromagnetic wave of the holding wire that transmits high-frequency signal or peripheral equipment radiation.
Fig. 5 represents general known coaxial cable, is the stereogram of the state of the crust (sheath) of having removed leading section.Coaxial cable 1 is provided with inner conductor 2 at the center, its outside insulated body 3 covers, and compresses periphery coiling bandage (binding tape) 3a of insulator 3, at its periphery configuring external conductor 4 and crust 5 coaxially.Be the thin footpathization of seeking coaxial cable 1 reduced thickness with insulator 3.The insulator 3 preferred lower fluororesin of dielectric constant of comparing with other resin.In addition, the spy opens in the disclosed coaxial cable of flat 11-144533 communique, makes the fluororesin foaming, forms a plurality of small bubbles, further reduces dielectric constant.
Fig. 6 A, 6B are the concept maps that is illustrated in the coaxial cable of the structure that is wound with strand on the inner conductor, and Fig. 6 A is perpendicular to the profile of cable axle, and Fig. 6 B is the profile that comprises the cable axle.Coaxial cable 1 ' in, the inner conductor 2 of central authorities ' the periphery helical coil around the strand 7 that for example constitutes, at its periphery extrusion molding insulated tube 6 or reel band and form the core body part by this insulating material of PET.And, the periphery configuring external conductor 4 of insulated tube 6 ', it is by crust 5 ' covering protection.As everyone knows, this coaxial cable 1 ' by make inner conductor 2 ' and external conductor 4 ' between be not insulated thing and be full of but accompany air layer 8, thereby reduce dielectric constant, reduce dielectric losses (for example opening flat 7-182930 communique (Fig. 3)) with reference to the spy.
When using the foaming fluororesin as the insulator 3 of coaxial cable 1, the foaming fluororesin band of reeling in the outside of inner conductor 2 forms insulator 3.In this case, inner conductor 2 is extracted in the fitting tightly property reduction of insulator 3 and inner conductor 2 easily from insulator 3, in addition, also has the problem that can not improve streamline speed (line speed).As bandage 3a, use the polyester belt that the band bonding agent is arranged usually, but it meets hot can the contraction, insulator 3 can expose in the processing that tape welding connects, and the thermal endurance of coaxial cable 1 is also bad.
Coaxial cable 1 ' owing to extruding insulation pipe around strand 7 forms insulator, so can improve streamline speed.On the other hand, mounting insulating resin well not on strand 7 forms than unfertile land under the situation of insulated tube 6, and the resin fracture of the part of joining with strand 7 is easy to generate pin hole, the electric short circuit of and inner conductor 2 ' and external conductor 4 ' easily.In addition, the internal diameter of insulated tube 6 is " inner conductor 2 ' the external diameter of external diameter+2 * strand 7 ", is unfavorable for the thin footpathization of coaxial cable.
Summary of the invention
The object of the present invention is to provide a kind of coaxial cable and multicore coaxial cable, it has the insulator of low-k of band air layer, can be with the thin footpathization of external diameter, and bendability is good, can improve productivity.
For realizing purpose, coaxial cable of the present invention will form the resinous core rope (filling yam) of leading filament and electrical insulating property of inner conductor and twist with the fingers strand mutually, the insulator of its outside by tubulose covered, make insulator respectively with lead filament and the core rope joins, at the periphery configuring external conductor of insulator.In addition, multicore coaxial cable of the present invention has the coaxial cable of many basic inventions, and they are covered by the common sheath that is made of insulating material.
Description of drawings
Figure 1A, 1B are the figure of the embodiment of expression coaxial cable of the present invention, and Figure 1A is the stereogram of the state after the crust of leading section is removed, and Figure 1B is perpendicular to the profile of cable axle;
Fig. 2 A～2D is that expression has many concept maps of the example of the multicore coaxial cable of the coaxial cables of invention at all;
Fig. 3 A, 3B are illustrated in the figure that is formed with the example that is electrically connected terminal part on the multicore coaxial cable, and Fig. 3 A is to use the concept map of the example of multicore coaxial cable 20, and Fig. 3 B is to use the concept map of the example of multicore coaxial cable 21;
Fig. 4 is the concept map of expression bend test method;
Fig. 5 is the figure of the general known coaxial cable of expression, is the stereogram of the state after the crust of front end is removed;
Fig. 6 A, 6B are the concept maps that is illustrated in the coaxial cable of the structure that is wound with strand on the inner conductor, and Fig. 6 A is perpendicular to the profile of cable axle, and Fig. 6 B is the profile that contains the cable axle.
Embodiment
With reference to the description of drawings embodiments of the invention.In the accompanying drawings, for avoiding repeat specification, identical parts mark same Reference numeral.The ratio of size is uninevitable consistent with explanation in the accompanying drawing.
Figure 1A, 1B are the concept maps of the embodiment of expression coaxial cable of the present invention, and Figure 1A is the stereogram of the state after the crust of leading section is removed, and Figure 1B is perpendicular to the profile of cable axle.In the coaxial cable 11,, its periphery is covered with tubular insulator 14, form the core body part forming leading filament and twisting with the fingers strand of inner conductor 12 by the core rope 13 that the electrical insulating property resin constitutes.Then, at the coaxial shape of the periphery of insulator 14 ground configuring external conductor 15, its outside is coated with crust 16.
Periphery spiral (spirally winding) or leads such as braiding (braiding) coiling copper cash, copper alloy wire at insulator 14.For example, the silver-plated copper alloy wire of screw winding external diameter 0.03mm constitutes external conductor 15.Two of overlapping coilings of the periphery of conductor 15 (overlap wrapping) polyester belt about the about 0.004mm of thickness for example externally dissolves it mutually and constitutes crust 16.Its result obtains the superfine coaxial cable 11 about external diameter 0.38mm.
In the coaxial cable 11, the part of inner conductor 12 and insulator 14 join, but the insulator layer between inner conductor 12 and the external conductor 15 contains a large amount of air layers as a whole.Its result, making the dielectric constant of the average insulator layer of the dielectric constant of air layer, core rope and insulator is about 1.3, littler than the dielectric constant (2.1) of the insulator layer that is made of fluororesin of real core.Thus, obtain and use the insulator layer of foamed insulation resin or coaxial cable 1 ' the few coaxial cable of dielectric losses (decay) of insulator layer same degree.And, because insulator 14 can form by extrusion molding,, can accelerate streamline speed so compare with the existing coaxial cable of using foaming fluororesin insulating tape, improve productivity.In addition, foaming fluororesin price is high, but in coaxial cable 11, can be obtained equal performance by more cheap material.
With coaxial cable 11 and existing coaxial cable 1 ' compare, can reduce the insulator internal diameter.In addition, at inner face,,, can reduce the generation of pin hole so can form thin-walled cylindraceous because inner conductor 12 and core rope 13 become the form of joining simultaneously in mutually opposite position as the insulator 14 of pipe.Coaxial cable 1 ' structure in, in the cross section perpendicular to axle, insulator only has a place with the position that wherein works (inner conductor and strand) joins, the position beyond it is easily destroyed.When insulator destroyed, the resin at the position that joins with strand flowed towards periphery, caused resin fracture (cutting れ), thought the generation pin hole.Relative therewith, in an embodiment of the present invention, in cross section perpendicular to axle because insulator contacts with wherein works at two positions, so with coaxial cable 1 ' compare, insulator is difficult to destroyed, is difficult for causing that resin ruptures.Existing coaxial cable 1 ' in, need add the thickness of thick insulator in order not produce pin hole, but in an embodiment of the present invention owing to be difficult to produce pin hole, so the thickness that can make insulator than existing coaxial cable 1 ' thin thickness.Its result, the coaxial cable that thin footpath that coaxial cable 11 can be the coaxial cable same degree that forms with existing coiling foaming fluororesin band has been changed.
In addition, because inner conductor 12 and core rope 13 are configured in the insulator 14 under the state of twisting with the fingers strand, so inner conductor 12 is not drawn out easily.In addition, if with the fluororesin of same material (for example tetrafluoroethene perfluoroalkyl vinyl ether copolymer: be called for short PFA) make core rope 13 and insulator 14 the two, then can improve thermal endurance (about 250 ℃), and can improve anti-scolding tin and handle property.In addition, in the terminal processes of utilizing laser to carry out, the cut-out of core rope 13 is removed also and can be carried out simultaneously with insulator 14, and operability is improved.
Fig. 2 A～2D is that expression has many concept maps of the example of the multicore coaxial cable of the coaxial cables of invention at all.Multicore coaxial cable 20 shown in Fig. 2 A is with many coaxial cables 11 pencils configurations, the example that is gathered together by public crust 18.In multicore coaxial cable 20, because each coaxial cable 11 is protected by crust 16 respectively, so multicore coaxial cable 20 carries out single core distribution along separate routes easily, external conductor 15 can not get loose (バ ラ け Ru) yet, and the property handled is good.
Multicore coaxial cable 20 shown in Fig. 2 B ' be is the many coaxial cable 11 ' pencil configurations that do not have crust 16, by the example of public crust 18 ' gather together.Multicore coaxial cable 20 ' in, each coaxial cable 11 ' external conductor 15 be in contact with one another, the common electrical connection, and can be low resistance as a whole can be suppressed lessly with covering potential difference.In addition, as multicore coaxial cable 20,20 ', by with the set of many coaxial cable pencils, the sth. made by twisting that can improve multicore coaxial cable is around performance.
Fig. 2 C represents many coaxial cables 11 parallel with crust 16 are listed as and row arrangement, form the example of flat multicore coaxial cable 21 by public crust 19, Fig. 2 D represents the many coaxial cables 11 that do not have a crust 16 ' parallel row and row arrangement, by the flat multicore coaxial cable 21 of common sheath 19 ' form ' example.In addition, multicore coaxial cable 21,21 ' in, common sheath 19,19 ' also can for coaxial cable 11,11 ' the bonding joint in top and bottom and coat the form of crust with insulating tape.
Multicore coaxial cable 21,21 ' advantage have, can use the using method identical by forming tabular with FPC, particularly be suitable for the distribution that carries out along tabular surface, in addition, can improve bending property.In addition, multicore coaxial cable 20,20 ', 21,21 ' any in, each coaxial cable is also covered by external conductor 15 respectively, can guarantee impedance matching and EMI characteristic.
Fig. 3 A, 3B are illustrated on the multicore coaxial cable figure that forms the example that is electrically connected terminal part, and Fig. 3 A is the concept map of the connecting terminal arranged with the form that easily end of each coaxial cable is electrically connected in multicore coaxial cable 20.Electrical connection terminal shown in Fig. 3 A forms via following each operation.At first, the coaxial cable 11 of pack with being spaced in the plane of regulation, being pasted splicing tape 22 and fixed, guarantee that it at interval.Splicing tape 22 can use resin strips such as polyester or fluororesin.Then, the crust of each cable 11 terminal is removed, external conductor 14 is exposed.
Then, being electrically connected earth rod (グ ラ Application De バ one) 24 ground on each external conductor 14 installs.For example weld or bonding by the conductivity adhesives.Thus, the end of each coaxial cable 11 also by earth rod 24 in the plane with the regulation be spaced, remain one.Then, the part of external conductor 14 is residual, the external conductor 14 of its end is removed, insulator 13 is exposed.Afterwards, the part of insulator 13 is residual, the insulator 13 of its end is removed, inner conductor 12 is exposed.And then under the electrical connection terminal shown in Fig. 3 A being installed in the situation on the connector or being installed in situation on the substrate, also splicing tape 22 can be peeled use.
In Fig. 3 A, represented to have the electrical connection terminal of the conglobate multicore coaxial cable 20 of coaxial cable 11 multiple-cores of crust, but changed in the flat multicore coaxial cable 21, also can form identical structure being electrically connected terminal point at multicore.The multicore coaxial cable 20 of the coaxial cable 11 ' multiple-core that will not have crust ', 21 ' in, also can form same electrical connection terminal, but needn't remove crust this moment.
Fig. 3 B is the additional concept map that the connecting terminal of bindiny mechanism is arranged on multicore coaxial cable 21.Electrical connection terminal shown in Fig. 3 B forms via following operation.Until external conductor 14, insulator 13, inner conductor 12 are removed successively, a section ground exposes, and the operation that is electrically connected with earth rod 24 of external conductor 14, with illustrated identical of Fig. 3 A.The inner conductor 12 of each coaxial cable 11 is electrically connected with contact 25 on being located at connector.Thus, can by scolding tin or conductivity is bonding connect.
Then, cover by the cover of connector a part earth rod 24, external conductor 14, insulator 13, inner conductor 12 and contact 25.At this moment, external conductor is electrically connected with the earth terminal of connector.When using metal housing, housing can be used as the earth terminal of connector as cover.In this case, earth rod and housing conducting, housing and not conducting of inner conductor.When the jack (not shown) of connector 23 and equipment side when being connected, contact 25 is electrically connected with the signal circuit of jack, and earth rod is electrically connected with the earthed circuit that is connected in jack.
Represented among Fig. 3 B that coaxial cable 11 multicores that will have crust change into the electrical connection terminal of flat multicore coaxial cable 21, but in the multicore coaxial cable 20 of the circular shape of multiple-core, also electrical connecting terminal can have been formed same structure.The coaxial cable 20 of the coaxial cable 11 ' multiple-core that will not have crust ', 21 ' in also can form same electrical connection terminal, this moment, coaxial cable did not have crust thus, so needn't remove crust.Usually, connector has a plurality of contacts 25 that high density one row are arranged.Therefore, preferred use with coaxial cable 11,11 ' with the pitch of regulation be arranged in flat multicore coaxial cable 21,21 '.
Make the product of the present invention (embodiment) and the existing product (comparative example) of structure shown in the table 1, relatively its electrical characteristic, mechanical property.The foaming fluororesin band that uses in the comparative example is in particular Port ア Off ロ Application (Sumitomo Electric Industries' registered trade mark) band.
Table 1
| Project | Comparative example | Embodiment | |
| Inner wire | Material | The silver-plated copper alloy wire | The silver-plated copper alloy wire |
| Multifibres/ |
7/0.025 | 7/0.025 | |
| External diameter mm | 0.075 | 0.075 | |
| Insulator | Material | Foaming fluororesin band+polyester belt | PFA (core rope)+PFA (pipe) |
| External diameter mm | 0.25 | 0.29 | |
| Outer conductor | Material | The tin-coated copper alloy wire | The tin-coated copper alloy wire |
| Filament diameter mm/ packing | 0.03/ spiral covers | 0.03/ spiral covers | |
| Crust | Material | Polyester belt | Polyester belt |
| Reel | Overlapping coiling | Overlapping coiling | |
| External diameter mm | 0.34 | 0.38 | |
| Resistance Ω/km | 5800 | 5800 | |
| The characteristic impedance of every 10MHz Ω/km | 80 | 80 | |
| The loss of every 10MHzdB/km | 430 | 430 | |
As insulator, the polyester belt that existing product use foaming fluororesin band and its volume are pressed, making total insulation external diameter is 0.25mm.Relative therewith, product of the present invention uses the extrusion molding of PFA core rope and PFA resin, and the external diameter that makes insulator is 0.29mm.These electrical characteristics are measured, and it is 5800 Ω/km that existing product and product of the present invention all obtain conductor resistance, and characteristic impedance is 80 Ω (10MHz), and attenuation is the roughly the same characteristic of 430dB/km (10MHz).
Fig. 4 is the concept map of expression bend test method.With the method shown in Fig. 4 (B) coaxial cable of embodiment, comparative example is carried out bend test.In condition 1 (angle of bend ± 90 ° are with 30 times/minute speed bending for the external diameter φ=2mm of mandrel 26, load W=20g), get the average of five samples, existing product produces broken string at the 7419th inner conductor.Product of the present invention produces broken string at the 21860th time, has roughly 3 times the life-span of existing product.In condition 2 (angle of bend ± 90 ° are with 30 times/minute speed bending for the external diameter φ=10mm of mandrel 26, load W=10g), get the average of five samples, existing product produces broken string at the 29521st inner conductor.Product of the present invention produces broken string at the 76259th time, has roughly 2.5 times the life-span of existing product.
Can judge that from above result the bending resistance characteristic of coaxial cable of the present invention is also good, be useful to the medical cable of the bend of information communication device, for example distribution by hinge fraction and bending when using etc.As existing product, have the coaxial cable 1 shown in Fig. 6 A, the 6B ', be that 0.38mm is relative with the external diameter of the coaxial cable of the embodiment of the invention, coaxial cable 1 ' external diameter be 0.45mm, can not satisfy the requirement of thin footpathization.In addition, because coaxial cable 1 ' on insulated tube, produce pin hole easily, thus compare with coaxial cable of the present invention, the defect rate height, manufacturing is bad.
The application proposes based on the Japanese patent application (the special 2005-014401 of hope) of on January 21st, 2005 application, its content at this as with reference to utilizing.
Claims (5)
1. coaxial cable, wherein, with form inner conductor lead filament and the resinous core rope of electrical insulating property is twisted with the fingers strand mutually, the insulator of its outside with tubulose covered, so that described insulator is led filament and described core rope joins with described respectively, and at the periphery configuring external conductor of described insulator.
2. coaxial cable as claimed in claim 1, wherein, described core rope and described insulator are all formed by fluororesin.
3. a multicore coaxial cable wherein, has the many described coaxial cables of claim 1, and described many coaxial cables are coated by the common sheath that is made of insulating material.
4. multicore coaxial cable as claimed in claim 3, wherein, described many coaxial cables are arranged by a parallel row ground.
5. coaxial cable as claimed in claim 3, wherein, the end of at least one side in the described many coaxial cables has the electrical connection terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610106180A CN101110283B (en) | 2006-07-20 | 2006-07-20 | Coaxial cable and multi-core coaxial cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610106180A CN101110283B (en) | 2006-07-20 | 2006-07-20 | Coaxial cable and multi-core coaxial cable |
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| CN101110283A true CN101110283A (en) | 2008-01-23 |
| CN101110283B CN101110283B (en) | 2010-05-12 |
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| CN200610106180A Expired - Fee Related CN101110283B (en) | 2006-07-20 | 2006-07-20 | Coaxial cable and multi-core coaxial cable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102592721A (en) * | 2012-03-20 | 2012-07-18 | 青岛光电电子器具有限公司 | Electrocardiogram cable and manufacturing method thereof |
| CN103515018A (en) * | 2012-06-26 | 2014-01-15 | 住友电气工业株式会社 | Multi-core cable |
| CN104205251A (en) * | 2012-03-05 | 2014-12-10 | 胡贝尔舒纳公司 | Method for producing a stranded inner conductor for coaxial cable, and coaxial cable |
| CN107895604A (en) * | 2017-12-18 | 2018-04-10 | 刘涛 | A kind of resist bending flexible cable |
| CN108962470A (en) * | 2018-08-14 | 2018-12-07 | 安徽渡江电缆集团有限公司 | A kind of low temperature resistant cable for new-energy electric vehicle |
| CN110828039A (en) * | 2018-08-08 | 2020-02-21 | 日立金属株式会社 | Movable cable |
| CN113263263A (en) * | 2021-06-24 | 2021-08-17 | 长春理工大学 | Radio frequency connector and coaxial cable visual laser welding equipment and control method thereof |
| CN113851257A (en) * | 2020-06-26 | 2021-12-28 | 莫列斯有限公司 | Electric wire and composite cable |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6259031B1 (en) * | 1998-08-06 | 2001-07-10 | Krone Digital Communications | Cable with twisting filler |
| US6812401B2 (en) * | 1998-10-05 | 2004-11-02 | Temp-Flex Cable, Inc. | Ultra-small high-speed coaxial cable with dual filament insulator |
| TWI264020B (en) * | 2002-02-08 | 2006-10-11 | Hirakawa Hewtech Corp | Foamed coaxial cable with high precision and method of fabricating same |
-
2006
- 2006-07-20 CN CN200610106180A patent/CN101110283B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104205251A (en) * | 2012-03-05 | 2014-12-10 | 胡贝尔舒纳公司 | Method for producing a stranded inner conductor for coaxial cable, and coaxial cable |
| CN102592721A (en) * | 2012-03-20 | 2012-07-18 | 青岛光电电子器具有限公司 | Electrocardiogram cable and manufacturing method thereof |
| CN102592721B (en) * | 2012-03-20 | 2013-12-25 | 青岛光电电子器具有限公司 | Electrocardiogram cable and manufacturing method thereof |
| CN103515018A (en) * | 2012-06-26 | 2014-01-15 | 住友电气工业株式会社 | Multi-core cable |
| US9269477B2 (en) | 2012-06-26 | 2016-02-23 | Sumitomo Electric Industries, Ltd. | Multi-core cable |
| CN107895604A (en) * | 2017-12-18 | 2018-04-10 | 刘涛 | A kind of resist bending flexible cable |
| CN110828039A (en) * | 2018-08-08 | 2020-02-21 | 日立金属株式会社 | Movable cable |
| CN110828039B (en) * | 2018-08-08 | 2022-06-03 | 日立金属株式会社 | Movable cable |
| CN108962470A (en) * | 2018-08-14 | 2018-12-07 | 安徽渡江电缆集团有限公司 | A kind of low temperature resistant cable for new-energy electric vehicle |
| CN113851257A (en) * | 2020-06-26 | 2021-12-28 | 莫列斯有限公司 | Electric wire and composite cable |
| CN113263263A (en) * | 2021-06-24 | 2021-08-17 | 长春理工大学 | Radio frequency connector and coaxial cable visual laser welding equipment and control method thereof |
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|---|---|
| CN101110283B (en) | 2010-05-12 |
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