CN105225738A - Shield cable - Google Patents
Shield cable Download PDFInfo
- Publication number
- CN105225738A CN105225738A CN201510712278.6A CN201510712278A CN105225738A CN 105225738 A CN105225738 A CN 105225738A CN 201510712278 A CN201510712278 A CN 201510712278A CN 105225738 A CN105225738 A CN 105225738A
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- metal
- metal conductive
- conductive shield
- band
- shield
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Abstract
A kind of shield cable, comprise at least one holding wire, and two metal conductive shield bands covering holding wire periphery, described metal conductive shield band covers the wherein simultaneously upper of plastic substrate by metal forming to be formed, the metal foil surfaces of the first metal conductive shield band outwardly, and described holding wire periphery spirally winding and limit several the first spiral coils; The metal foil surfaces of the second metal conductive shield band inwardly, and reels at the periphery reverse acting spiral shape of described first metal conductive shield band and limits several the second spiral coils; Continuous print electrical contact is formed between described first metal conductive shield band and the second metal conductive shield band.The present invention, owing to adopting double layer of metal conducting screen shield tape intersection band mode, makes the metal foil surfaces of double layer of metal conducting screen shield tape combine completely closely, and there will not be periodically breakpoint, finally guarantee conducting surface continuity.Thus solve the resonance problem that produces because of the capacitance cyclic fluctuation of screening conductive face, finally reach and solve the decay of high-frequency point and to dash forward the effect of problem.
Description
Technical field
The present invention relates to a kind of shielded type cable, particularly relate to a kind of shield cable being coated with metal conductive shield band in holding wire periphery.
Background technology
The shielded type cable of holding wire, in signals transmission, owing to overlapping high low head problem during metal tape band, capacitance is made to occur cyclic fluctuation, signal can be caused in transmitting procedure to produce resonance, cause signal to occur that decay is dashed forward problem in high-frequency, finally affect signal integrity.
Current shielded type cable on the market, all adopt the mode of individual cord or two wrapped metal formings of heart yearn to carry out band, general Duplication is more than 25%.Outside more coated one deck wheat is pulled up to fixation.This shielded type cable uses metal to shield, and owing to overlapping high low head problem during metal tape band, makes capacitance occur cyclic fluctuation, causes signal to there will be decay at about 13GHz in transmitting procedure and seriously to dash forward problem.
For the problems referred to above, some producers or company have also carried out corresponding improvement.Such as publication number is that the Chinese patent literature of CN102237156A discloses a kind of shielded type cable, this shielded type cable has shielded conductor, this shielded conductor is by being wound on many holding wire peripheries and obtained by metallic cover resin strip, in the coil lap of metallic cover resin strip, metal forming and lower metal forming are electrical contact with each other.A marginal portion of metallic cover resin strip is folded back, and makes metal forming be arranged in outside.
Although this technology can solve decay that signal occurs in transmitting procedure and to dash forward problem, there are some problems in this technique of metallic cover resin strip part being turned back.First, the part be folded back only account for whole bandwidth 1/2nd less than, width is very little, big machinery carry out turning back operation process in be difficult to the guarantee width that turns back consistent, probably width differs, if the width turned back is too small, the conductivity of the metal forming in lap can be made insufficient, if turned back, width is excessive, can need extra metallic cover resin strip winding and easily multilated; Secondly, the technology before the process ration that turns back, has higher difficulty, easy card film and broken belt in metallic cover resin strip winding process; Finally, because adding the technique of turning back, the speed of whole production and processing can be caused to slow down, production efficiency reduces.
Summary of the invention
In order to overcome the problems referred to above, the invention provides a kind of convenient for production and shield cable of stable performance.
Technical scheme of the present invention is: provide a kind of shield cable, comprise at least one holding wire, and cover the metal conductive shield band of holding wire periphery, described metal conductive shield band covers the wherein simultaneously upper of plastic substrate by metal forming to be formed, described metal conductive shield band has two, the metal foil surfaces of the first metal conductive shield band outwardly, and described holding wire periphery spirally winding and limit several the first spiral coils; The metal foil surfaces of the second metal conductive shield band inwardly, and reels at the periphery reverse acting spiral shape of described first metal conductive shield band and limits several the second spiral coils; Continuous print electrical contact is formed between described first metal conductive shield band and the second metal conductive shield band.
As improvement of the present invention, between adjacent described first spiral coil, there is lap.
As improvement of the present invention, described first metal conductive shield band has the first width, and the lap of described first spiral coil has the second width, and the ratio that the second width accounts for the first width is between six ten ten to percent 3 percent.
As improvement of the present invention, between adjacent described second spiral coil, there is lap.
As improvement of the present invention, described second metal conductive shield band has the 3rd width, and the lap of described second spiral coil has the 4th width, and the ratio that the 4th width accounts for the 3rd width is between six ten ten to percent 3 percent.
As improvement of the present invention, described metal forming is made up of copper or aluminium or copper-aluminum composite conductor.
As improvement of the present invention, the thickness of described metal forming is 3-30 μm.
As improvement of the present invention, described plastic substrate is made up of PET mylar or resin.
As improvement of the present invention, the thickness of described plastic substrate is 3-50 μm.
As improvement of the present invention, described holding wire comprises metallic conductor and covers the insulator of described metallic conductor periphery.
The invention has the beneficial effects as follows: one, owing to adopting double layer of metal conducting screen shield tape intersection band mode, the metal foil surfaces of first layer metal conducting screen shield tape outwardly, the Duplication of adjacent spiral coil is more than 30%, the metal foil surfaces of second layer metal conducting screen shield tape inwardly, band direction is contrary with ground floor, the Duplication of adjacent spiral coil is more than 30%, can guarantee that the metal foil surfaces of double layer of metal conducting screen shield tape can combine completely closely, and there will not be periodically breakpoint, finally guarantee conducting surface continuity.Thus solve the resonance problem that produces because of the capacitance cyclic fluctuation of screening conductive face, finally reach and solve the decay of high-frequency point and to dash forward the effect of problem; Two, production efficiency can not be affected in process of manufacture, because double layer of metal conducting screen shield tape can simultaneously band, the initial band time of second layer metal conducting screen shield tape only slightly postpones than the initial band time of first layer metal conducting screen shield tape, and therefore speed of production can't obviously reduce.
Accompanying drawing explanation
Fig. 1 is the perspective structure schematic diagram of coated first layer metal conducting screen shield tape in the first embodiment of the present invention.
Fig. 2 is the perspective structure schematic diagram of Fig. 1 coated second layer metal conducting screen shield tape.
Fig. 3 is the perspective structure schematic diagram of coated first layer metal conducting screen shield tape in the second embodiment of the present invention.
Fig. 4 is the perspective structure schematic diagram of Fig. 3 coated second layer metal conducting screen shield tape.
Fig. 5 is the signal attenuation frequency characteristic schematic diagram of conventional shielded type cable.
Fig. 6 is the signal attenuation frequency characteristic schematic diagram of the shielded type cable in the embodiment of the present invention.
Embodiment
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as " " center ", " on ", D score, "front", "rear", "left", "right" in term be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection ", " being connected " should be interpreted broadly, and such as, can be fixedly connected with, and also can be that dismounting connects, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also can be indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term can be understood at concrete meaning of the present invention.In addition, in describing the invention, except as otherwise noted, the implication of " multiple ", " some " is two or more.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Refer to Fig. 1 and Fig. 2, what Fig. 1 and Fig. 2 disclosed is a kind of shield cable, comprises holding wire 100 and two strip metal conducting screen shield tape 200/300.In this embodiment, described holding wire 100 is single-signal-line 100, comprises metallic conductor 110 and insulator 120.Described metallic conductor 110 is copper or aluminium or copper aluminium or silver-plated copper composite conductor.Described insulator 120 can adopt the material that dielectric constant is low, such as polyethylene or fluororesin.Metallic conductor 110 is wrapped in interior formation holding wire 100 by described insulator 120.
Every strip metal conducting screen shield tape 200/300 comprises metal forming 210 and plastic substrate 220.Described metal conductive shield band 200/300 covers the wherein simultaneously upper of plastic substrate 220 by described metal forming 210 to be formed.Described metal forming 210 is made up of copper or aluminium or copper-aluminum composite conductor.The thickness of described metal forming 210 is 3-30 μm.Described plastic substrate 220 is made up of PET mylar.The thickness of described plastic substrate 220 is 3-50 μm.
Outside the metal forming 210 of described first metal conductive shield band 200 is faced, and described holding wire 100 periphery spirally winding and limit several the first spiral coils 230.Between adjacent described first spiral coil 230, there is lap.Described first metal conductive shield band 200 has the first width A, and the lap of described first spiral coil 230 has the second width B, and the ratio that the second width B accounts for the first width A is between six ten ten to percent 3 percent.In the metal forming 210 of the second metal conductive shield band 300 faces, and described first metal conductive shield band 200 periphery reverse acting spiral shape winding and limit several the second spiral coils 330.Between adjacent described second spiral coil 330, there is lap.Described second metal conductive shield band 300 has the 3rd width C, and the lap of described second spiral coil 330 has the 4th width D, and the ratio that the 4th width D accounts for the 3rd width C is between six ten ten to percent 3 percent.When described first metal conductive shield band 200 along clockwise direction screw winding time, so the second metal conductive shield band 300 screw winding in the counterclockwise direction; Vice versa.Reason is, if double layer of metal conducting screen shield tape 200/300 reels all in the same direction, so likely occurs that the thickness of lap differs, and makes electric capacity can not keep stable, equally also can cause high frequency loss.It should be noted that, though described second metal conductive shield band 300 is contrary with first metal conductive shield band 200 hand of spiral, but move in the direction extended along described holding wire 100 equally.Between described first metal conductive shield band 200 and the second metal conductive shield band 300, the metal forming 210 of described first spiral coil 230 forms electrical contact with the metal forming 210 of the second spiral coil 330, and this electrical contact does not exist interruption, thus can make bucking current continuously and steady flow.Although invariably signal attenuation cannot be there will be at high frequencies, adopt this programme still effectively can reduce decay.
Compare conventional shielded type cable, the lap that invention increases between adjacent coils 230/330 accounts for the ratio of metal conductive shield band 200/300 bandwidth.Increasing Duplication is the resonance produced in transmitting procedure to reduce signal, can reduce signal attenuation.
Refer to Fig. 3 and Fig. 4, Fig. 3 is the perspective structure schematic diagram of coated first layer metal conducting screen shield tape in another kind of embodiment of the present invention, and Fig. 4 is the perspective structure schematic diagram of Fig. 3 coated second layer metal conducting screen shield tape.Comprise holding wire 100 and two strip metal conducting screen shield tape 200/300.Article 2, described holding wire 100 can be arranged in parallel with each other, and also can be twisted pair construction.Certainly, the quantity of described holding wire 100 not only comprises two, can also be four.In addition, the first embodiment of disclosing of the present embodiment and Fig. 1 with Fig. 2 is identical.
Refer to Fig. 5 and Fig. 6, Fig. 5 and Fig. 6 is the signal attenuation frequency characteristic schematic diagram of the shielded type cable in conventional shielded type cable and the embodiment of the present invention respectively.Shielded type cable is bifilar holding wire, it has the metal conductive shield band be wound in a spiral on 2 parallel signal lines, difference is, described conventional shielded type cable adopts layer of metal conducting screen shield tape, and the shielded type cable in the embodiment of the present invention adopts double layer of metal conducting screen shield tape.In conventional shielded type cable, when frequency reaches 13GHz, there will be signal attenuation and to dash forward problem, reason is that screen produces periodic breaks and produces resonance; And in embodiments of the present invention, signal attenuation is stable, there is no phenomenon of dashing forward, after reason is to adopt the coated described holding wire of two-layer described metal conductive shield band, the metal foil surfaces of two-layer described metal conductive shield band is closely linked, ensure that capacitance stability, thus bucking current can steadily flow through.
Obviously, those skilled in that art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a shield cable, comprise at least one holding wire, and cover the metal conductive shield band of holding wire periphery, described metal conductive shield band covers the wherein simultaneously upper of plastic substrate by metal forming to be formed, it is characterized in that, there are two described metal conductive shield bands, the metal foil surfaces of the first metal conductive shield band outwardly, and described holding wire periphery spirally winding and limit several the first spiral coils; The metal foil surfaces of the second metal conductive shield band inwardly, and reels at the periphery reverse acting spiral shape of described first metal conductive shield band and limits several the second spiral coils; Continuous print electrical contact is formed between described first metal conductive shield band and the second metal conductive shield band.
2. shield cable according to claim 1, is characterized in that, has lap between adjacent described first spiral coil.
3. shield cable according to claim 2, it is characterized in that, described first metal conductive shield band has the first width, and the lap of described first spiral coil has the second width, and the ratio that the second width accounts for the first width is between six ten ten to percent 3 percent.
4. shield cable according to claim 1, is characterized in that, has lap between adjacent described second spiral coil.
5. shield cable according to claim 4, it is characterized in that, described second metal conductive shield band has the 3rd width, and the lap of described second spiral coil has the 4th width, and the ratio that the 4th width accounts for the 3rd width is between six ten ten to percent 3 percent.
6. shield cable according to claim 1, is characterized in that, described metal forming is made up of copper or aluminium or copper-aluminum composite conductor or silver-plated copper composite conductor.
7. shield cable according to claim 6, is characterized in that, the thickness of described metal forming is 3-30 μm.
8. shield cable according to claim 1, is characterized in that, described plastic substrate is made up of PET mylar.
9. shield cable according to claim 8, is characterized in that, the thickness of described plastic substrate is 3-50 μm.
10. shield cable according to claim 1, is characterized in that, described holding wire comprises metallic conductor and covers the insulator of described metallic conductor periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712278.6A CN105225738A (en) | 2015-10-28 | 2015-10-28 | Shield cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712278.6A CN105225738A (en) | 2015-10-28 | 2015-10-28 | Shield cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105225738A true CN105225738A (en) | 2016-01-06 |
Family
ID=54994635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510712278.6A Pending CN105225738A (en) | 2015-10-28 | 2015-10-28 | Shield cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105225738A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108886244A (en) * | 2016-03-28 | 2018-11-23 | 泰连公司 | Band dispensing tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434354A (en) * | 1993-12-30 | 1995-07-18 | Mohawk Wire And Cable Corp. | Independent twin-foil shielded data cable |
| CN1354564A (en) * | 2000-11-16 | 2002-06-19 | 弗卢克网络公司 | Cable assembly |
| CN102237156A (en) * | 2010-04-08 | 2011-11-09 | 住友电气工业株式会社 | Shielded cable |
| CN102339662A (en) * | 2010-07-16 | 2012-02-01 | 住友电气工业株式会社 | Twisted-pair cable and method for manufacturing same |
| CN102623090A (en) * | 2011-01-27 | 2012-08-01 | 日立电线株式会社 | Differential signal transmission cable and method for fabricating the same |
| CN205080922U (en) * | 2015-10-28 | 2016-03-09 | 通盈电业（深圳）有限公司 | Novel shielded cable |
-
2015
- 2015-10-28 CN CN201510712278.6A patent/CN105225738A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5434354A (en) * | 1993-12-30 | 1995-07-18 | Mohawk Wire And Cable Corp. | Independent twin-foil shielded data cable |
| CN1354564A (en) * | 2000-11-16 | 2002-06-19 | 弗卢克网络公司 | Cable assembly |
| CN102237156A (en) * | 2010-04-08 | 2011-11-09 | 住友电气工业株式会社 | Shielded cable |
| CN102339662A (en) * | 2010-07-16 | 2012-02-01 | 住友电气工业株式会社 | Twisted-pair cable and method for manufacturing same |
| CN102623090A (en) * | 2011-01-27 | 2012-08-01 | 日立电线株式会社 | Differential signal transmission cable and method for fabricating the same |
| CN205080922U (en) * | 2015-10-28 | 2016-03-09 | 通盈电业（深圳）有限公司 | Novel shielded cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108886244A (en) * | 2016-03-28 | 2018-11-23 | 泰连公司 | Band dispensing tool |
| CN108886244B (en) * | 2016-03-28 | 2020-07-07 | 泰连公司 | Tape dispensing tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160106 |