CN201174277Y - Audio and video connection signal line - Google Patents
Audio and video connection signal line Download PDFInfo
- Publication number
- CN201174277Y CN201174277Y CNU2008200457962U CN200820045796U CN201174277Y CN 201174277 Y CN201174277 Y CN 201174277Y CN U2008200457962 U CNU2008200457962 U CN U2008200457962U CN 200820045796 U CN200820045796 U CN 200820045796U CN 201174277 Y CN201174277 Y CN 201174277Y
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- shielding layer
- signal line
- connection signal
- layer
- graphite composite
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- Expired - Fee Related
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- Communication Cables (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to a connection signal line used for audio/video signal transmission. The connection signal line comprises an electric conductor and an insulating layer, a shielding layer and an oversheath layer coated on the electric conductor from inside to outside, wherein the shielding layer is a PVC graphite composite shielding layer. When the connection signal line is used as a video monitoring connection signal line, a polyester membrane isolation layer and a woven wire cloth shielding layer are arranged in turn between the PVC graphite composite shielding layer and the oversheath layer; meanwhile, the PVC graphite composite shielding layer and the woven wire cloth shielding layer are combined to form a mixed shielding layer; the connection signal line not only has the advantages of high production efficiency and low production cost, and the like, but also has excellent shielding effect; and tests show that each technical index reaches or exceeds that of the prior double-woven wire cloth shielding layer video monitoring connection signal line, and the single-stage signal effective transmission distance of the connection signal line reaches 400 meters.
Description
Technical field:
The utility model relates to the connection holding wire of a kind of audio frequency, video signal transmission.
Background technology:
Existing audio frequency connects holding wire, and mainly insulating barrier, woven wire cloth screen and the external sheath layer of coating constitute successively from inside to outside by electric conductor and from electric conductor; Existing video connects holding wire, especially video monitoring connects holding wire, and mainly insulating barrier, the first woven wire cloth screen, polyester film separator, the second woven wire cloth screen and the external sheath layer of coating constitute successively from inside to outside by electric conductor and from electric conductor.The main effect of woven wire cloth screen is: (1) constitutes signal circuit as outer conductor with electric conductor; (2) prevent outside electromagnetic interference, guarantee the fidelity transmission of signal source; (3) prevent the transmission signals loss that leaks, improve effective propagation path.In order to improve its antijamming capability and to improve effective propagation path, existing video connects holding wire and all adopts double-level-metal silk mesh grid screen.
No matter be that audio frequency connects holding wire or video connects holding wire, owing to adopt the woven wire cloth screen, therefore have following shortcoming: (1) shield effectiveness is relevant with the density of woven wire cloth, and because of wire braid is netted, shield effectiveness is undesirable; (2) consume a large amount of expensive copper materials, production efficiency is low, production cost height, and the own wt of increase holding wire; (3) because shield effectiveness is undesirable, effective propagation path is shorter, the single-stage signal effective propagation path that for example existing video monitoring connects holding wire is 200 meters to the maximum, the distance of camera and host computer surpasses 200 meters, the centre must be provided with amplifier, this not only increases the expense of material, equipment, also sets up the increase difficulty to installation.
Summary of the invention:
The purpose of this utility model is to connect at existing audio frequency, video the shortcoming of holding wire, provides that a kind of shield effectiveness is good, the signal effective propagation path long and the low audio and video connecting signal lines of production cost.
The utility model comprises electric conductor and the insulating barrier, screen and the external sheath layer that coat successively from inside to outside from electric conductor, and described screen is a PVC graphite composite shielding layer.
The utility model can be set up polyester film separator and woven wire cloth screen successively between described PVC graphite composite shielding layer and external sheath layer.
The utility model, the thickness of described PVC graphite composite shielding layer is 0.15-0.30mm.
The utility model, the formation of described PVC graphite composite shielding layer comprises following weight ratio raw material:
Polyvinyl chloride resin 50-60; Plasticizer 40-50; Graphite powder 10-20; Stabilizer 2-5; Lubricant 2-3; Modifier 1-3.
It is the Corvic of TK-1000 that the utility model, described polyvinyl chloride resin can be selected model for use; Described plasticizer can adopt dioctyl phthalate (DOP) or triisooctyl trimellitate (TOTM); Described graphite powder can be selected nickel plating, silver-plated graphite powder for use, to improve its shield effectiveness; Described stabilizer can adopt the Ca-Zn stabilizer; Described lubricant can adopt positive butyl ester or PE wax; Described modifier can adopt elastomer.
The utility model, owing to adopt PVC graphite composite bed as screen, the woven wire cloth screen that replaces original audio frequency connection holding wire is connected the first woven wire cloth screen of holding wire with video monitoring, not only have advantages such as production efficiency height, production cost are low, but also have excellent shield effectiveness.
Description of drawings:
Fig. 1 is the structure principle chart that embodiment 1 audio transmission connects holding wire;
Fig. 2 is the structure principle chart that embodiment 2 video monitorings connect holding wire.
Among the figure, 1, electric conductor 2, insulating barrier 3, PVC graphite composite shielding layer 4, polyester film separator 5, woven wire cloth screen 6, external sheath layer.
Embodiment:
Embodiment 1, audio transmission connect holding wire.
With reference to Fig. 1, this audio transmission connects holding wire, and insulating barrier 2, PVC graphite composite shielding layer 3 and the external sheath layer 6 of coating constitute successively from inside to outside by electric conductor 1 and from electric conductor 1.The formation of described PVC graphite composite shielding layer comprises following raw material (containing the weight multiple): TK-1000 Corvic 60kg; Dioctyl phthalate (DOP) 45kg; Nickel plating, silvering graphite powder (product that can adopt eyebrow depressed place, Xi'an chemical industry Paper Co., Ltd to produce) 18.0kg; Ca-Zn stabilizer 4.0kg; PE wax 2.5kg; Modifier elastomer (TPE) 2.5kg; Described PVC graphite composite shielding layer extrudes common apparatus production through cable, and thickness is 0.20 ± 0.05mm; It is identical that the production method of all the other electric conductors 1, insulating barrier 2 and external sheath layer 6 and technical indicator and existing audio transmission are connected holding wire.
During use, the method for attachment of PVC graphite composite bed is identical with virgin metal silk mesh grid screen.Owing to adopt PVC graphite composite bed as screen, replace the woven wire cloth screen that original audio frequency connects holding wire, not only have advantages such as production efficiency height, production cost be low, but also has excellent shield effectiveness, after testing, every technical indicator arrives or surpasses the technical indicator of existing woven wire cloth screen audio transmission connection holding wire.
With reference to Fig. 2, this video monitoring connects holding wire, and insulating barrier 2, PVC graphite composite shielding layer 3, polyester film separator 4, woven wire cloth screen 5 and the external sheath layer 6 of coating constitute successively from inside to outside by electric conductor 1 and from electric conductor 1.The formation of described PVC graphite composite shielding layer comprises following raw material (containing the weight multiple): TK-1000 Corvic 60kg; Dioctyl phthalate (DOP) 45kg; Nickel plating, silvering graphite powder (product that can adopt eyebrow depressed place, Xi'an chemical industry Paper Co., Ltd to produce) 18kg; Ca-Zn stabilizer 4kg; Positive butyl ester 2.5kg; Modifier elastomer (TPE) 2.5kg, described PVC graphite composite shielding layer extrudes common apparatus production through cable, and thickness is 0.20 ± 0.05mm; It is identical that the production method of all the other electric conductors 1, insulating barrier 2, polyester film separator 4, woven wire cloth screen 5 and external sheath layer 6 and technical indicator and existing video monitoring are connected holding wire.
Owing to adopt PVC graphite composite bed to replace the first metal wire knitted stratum reticulare that the original video monitoring connects holding wire, during use, PVC graphite composite bed is connected from beginning to end with the metal wire knitted stratum reticulare, merge to constitute and mix screen, adopt and mix screen, not only have advantages such as production efficiency height, production cost be low, but also has excellent shield effectiveness, after tested, every technical indicator arrives or surpasses the technical indicator that existing composite wire mesh grid screen video monitoring connects holding wire, and its single-stage signal effective propagation path can reach 400 meters.This video monitoring is connected signal line application monitor in ordinary video, the centre needn't be provided with amplifier, also can reach effect clearly, and this has not only saved the expense of material installation, also sets up to installation and provides convenience.
Claims (3)
1, a kind of audio and video connecting signal lines comprises electric conductor (1) and the insulating barrier (2), screen and the external sheath layer (6) that coat successively from inside to outside from electric conductor (1), and it is characterized in that: described screen is a PVC graphite composite shielding layer (3).
2, audio and video connecting signal lines according to claim 1 is characterized in that: between described PVC graphite composite shielding layer (3) and external sheath layer (6), be provided with polyester film separator (4) and woven wire cloth screen (5) successively.
3, audio and video connecting signal lines according to claim 1 and 2 is characterized in that: the thickness of described PVC graphite composite shielding layer is 0.15-0.30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200457962U CN201174277Y (en) | 2008-03-31 | 2008-03-31 | Audio and video connection signal line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200457962U CN201174277Y (en) | 2008-03-31 | 2008-03-31 | Audio and video connection signal line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201174277Y true CN201174277Y (en) | 2008-12-31 |
Family
ID=40201402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200457962U Expired - Fee Related CN201174277Y (en) | 2008-03-31 | 2008-03-31 | Audio and video connection signal line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201174277Y (en) |
-
2008
- 2008-03-31 CN CNU2008200457962U patent/CN201174277Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20160331 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |