CN203014113U

CN203014113U - Signal connection wire

Info

Publication number: CN203014113U
Application number: CN 201220676563
Authority: CN
Inventors: 孙平
Original assignee: Guangdong Unionman Technology Co Ltd
Current assignee: Guangdong Unionman Technology Co Ltd
Priority date: 2012-12-11
Filing date: 2012-12-11
Publication date: 2013-06-19
Anticipated expiration: 2022-12-11

Abstract

The utility model relates to a signal connection wire. The signal connection wire comprises signal transmission wire and a shielding layer arranged at periphery of the signal transmission wire, wherein the shielding layer is connected in series with a blocking capacitor, and two ends of the signal connection wire can be designed to be various types of plugging connectors for being applied in different occasions. When the signal connection wire is applied to broadcast and television system signal transmission, one end of the signal connection wire is in plugging connection with a signal input terminal of a cable television or a set top box, the other end of the signal connection wire is in plugging connection with a cable television system signal output terminal. The signal connection wire is formed by adding the capacitor at two ends of a shielding layer of original signal wire and arranging an isolation area between a grounding end and the digital television and the set top box, so a current loop generated by floating ground voltage is cut off, and thereby the set top box and the television are effectively protected; simplicity and effectiveness are realized; and cost is low.

Description

A kind of signal connecting line

Technical field

The utility model relates to a kind of signal connecting line.

Background technology

Along with the development of electronic technology, the products such as digital TV set-top box have had very widely in the world to be used.But because the internal work power supply of the products such as set-top box or television set mostly is greatly Switching Power Supply, when by Switching Power Supply, alternating current being converted to various direct voltage, between high-voltage alternating side and low-voltage direct side, cross-over connection has safety electric capacity, therefore, not only there is floating ground voltage in the DC side of Switching Power Supply, also has floating ground voltage at the interface of set-top box or television set.When floating ground voltage poor large or the interface protection is weak or interface circuit when aging, two interfaces are linked a time-out, inevitably form the current drain loop, just certainly will produce to exchange and disturb, even may damage audio-video interface and AV line component lines or the HDMI line of set-top box and television set; Because electric current is large, also might cause on fire, burning, cause television set spontaneous combustion and damage, dangerous hidden danger is very large.

Interface damage problem for set-top box and television set, prior art adopts the mode that increases isolator between the tuner of set-top box and far-end network (as wired television network etc.), by set-top box and far-end network are separated, cut off thus the current circuit that floating ground voltage produces, to solve the interface damage problem of set-top box and television set.But because the isolator that there is no in the market finished product is sold, external isolator needs television set or the customization of set-top box producer, thereby cost is higher, and does not understand subjective because the mode that installs isolator additional makes the user, tends to affect the user and experiences.

Summary of the invention

The problem that the utility model need solve is to provide a kind of signal connecting line that can effectively prevent the safety problem that electrical apparatus interface produces floatingly.

Described signal connecting line comprises signal transmssion line and is located at the screen of signal transmssion line periphery, it is characterized in that, is serially connected with capacitance on described screen.

Preferably, described capacitance capacity is 100PF ~ 1000PF, and is withstand voltage more than 1000V.

Preferably, described signal connecting line two ends arrange connection-peg.Described connection-peg comprises IEC male, female or F male, female.

Have, the signal input terminal that described signal connecting line is applied to an end and cable TV or set-top box plugs, and the other end and cable television system signal output terminal are pegged graft.

There is prior art to compare, the beneficial effects of the utility model are: described signal connecting line is at electric capacity of screen two ends increase of original holding wire, between signal ground end and Digital Television, set-top box, the formation isolated area is set, the current circuit that produces to cut off floating ground voltage, can effectively solve the interface security protection question of set-top box and television set, adopt the mode of external isolator, cost reduces greatly; And can further promote user's experience.

Description of drawings

Fig. 1 is signal connecting line embodiment internal structure schematic diagram described in the utility model;

Fig. 2 is signal connecting line embodiment external structure schematic diagram described in the utility model.

Embodiment

Understand technology contents of the present utility model for convenience of those skilled in the art, below in conjunction with drawings and Examples, the utility model is described in further detail.

As shown in Figure 1, 2, signal connecting line shown in this embodiment is to be applied to cable television system, its two ends correspondence arranges the IEC plug, the signal input terminal and the cable television system signal output terminal that connect cable TV or set-top box with correspondence access outside cable TV signal set top box decodes or directly access television set.Usually the sort signal connecting line adopts the coaxial cable transmission of signal, and the coaxial cable periphery arranges screen, and screen specifically can adopt aluminium to compile shielding conductor or PVC material screen etc.Serial connection is cut off screen during electric capacity, and with copper sheet with an end circle of screen together, condenser welding is connected on the bottom line of copper sheet and IEC head, is partly copper sheet as black in Fig. 1.

The utility model is connected in series capacitor C in described screen, and between earth terminal and Digital Television, set-top box, corresponding isolated area is set, and the current circuit that produces to cut off floating ground voltage plays a protective role to set-top box or television interface.Capacitor C appearance value is chosen between 100PF ~ 1000PF best.

After described holding wire inside had been connected in series electric capacity, by the moulding of injection moulding mode, simple, cost was low again in the outside, can effectively protect set-top box and television set, had no effect for the holding wire outside, and whole profile is the same with the original signal line, as shown in Figure 2.

Above-described embodiment is only the preferred implementation of the utility model; it describes comparatively concrete and detailed; for the person of ordinary skill of the art; without departing from the concept of the premise utility; can also make some distortion and improvement to it; for example the plug according to different application occasion holding wire two ends can change any plug into, and these apparent replacement forms all belong to protection range of the present utility model.

Claims

1. signal connecting line comprises signal transmssion line and is located at the screen of signal transmssion line periphery, it is characterized in that, is serially connected with capacitance on described screen.

2. signal connecting line according to claim 1, it is characterized in that: described capacitance capacity is 100PF ~ 1000PF, and is withstand voltage more than 1000V.

3. signal connecting line according to claim 2 is characterized in that: described signal connecting line two ends arrange connection-peg, and described connection-peg comprises IEC male, female or F male, female.

4. signal connecting line according to claim 1, it is characterized in that: the signal input terminal of described signal connecting line one end and cable TV or set-top box plugs, and the other end and cable television system signal output terminal are pegged graft.