CN101198001A - Anti-interference television system bidirectional user port capable of preventing creepage - Google Patents
Anti-interference television system bidirectional user port capable of preventing creepage Download PDFInfo
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- CN101198001A CN101198001A CNA2007100484796A CN200710048479A CN101198001A CN 101198001 A CN101198001 A CN 101198001A CN A2007100484796 A CNA2007100484796 A CN A2007100484796A CN 200710048479 A CN200710048479 A CN 200710048479A CN 101198001 A CN101198001 A CN 101198001A
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Abstract
The invention discloses an anti-interference and creepage protective television system two-way user port which comprises an integral metallic shield casing, a circuit board, an input port and an output port arranged in the casing, wherein signal poles for connection with a coaxial signal cable and shaded poles for connection with a coaxial shield cable are arranged on both the input port and the output port, and the shaded poles of the input port respectively enter the casing through holes in the casing without communication with the casing and are isolated from the signal poles in a non-capacitance mode. The invention which not only meets the requirements of a digital TV but also is compatible with an analog TV has reliable and definite anti-interference and creepage protective functions which exist even in case of TV and set-top box circuit abnormality. In whatever cable TV networks of a digital TV system or an analog TV system, the invention can overcome the defects of the prior art and ensure the personnel safety of the user and excellent visual effect.
Description
Technical field:
The present invention relates to the two-way user port of the jockey of TV signal, particularly digital television signal.
Background technology:
The existing wired TV receiving system, comprise the user port that uses in the digital TV receiving system, no matter be unidirectional or two-way, no matter what input ports and output port are also arranged, it also no matter is the docking apparatus that employing standard F type docking apparatus or other have improved, following common issue with of ubiquity all: 1. the input shielding conductor of coaxial cable is connected with the metallic shield shell of user port, circuit generation problem when television set or digital TV set-top box, or during with contrary input signal line of alternating current or pickup electrode, electric capacity does not just have every electro ultrafiltration, thereby make the outer casing electrification of user port, the shielding conductor of electricity on the shell by the user port output port conducts to television set or set-top box and makes television set or set-top box charged, simultaneously, it is all charged that the shielding conductor conduction of electricity on the shell by the user port input port enters all shielding conductors that whole network system makes the consolidated network system and all user ports and all television sets or set-top box, so, whole television network has just become real electrical network, will injure all users and related work personnel (as line network maintenance personal's) life security.In addition, because on the shielding tape, just do not had shielding action, the clutter that various radio waves (as broadcasting wave, radiovision electric wave, wireless telecommunications ripple), industrial electrical equipment and household electrical appliance produce etc., all will go here and there cable television system, and in system, produce stack or amplify, the user of whole system is disturbed; 2. connect insecure, connector is given birth to and is embroidered the diode that has been equivalent to connect a resistance and a mixing, loose contact also can produce noise and interference---the distortion of public road, make the signal to noise ratio deterioration of television image, produce phenomenons such as snowflake, black thick stick and image move up and down, when serious image resolution ratio and contrast are obviously descended, whole image is just as the screen window that has been stopped up by dust, even mosaic, quiet frame, error code, signal interruption frequently occur and can not receive image etc.
Summary of the invention:
The purpose of this invention is to provide a kind of anti-interference and can prevent from the television system bidirectional user port that leaks electricity from can satisfy the Digital Television requirement, again can compatible simulated television, guarantee cable TV and digital cable customers personal safety and good view reception effect.
For this reason, the technical scheme that the present invention proposes is: to the metallic shield box shell that comprises integral structure, place circuit board in the shell, be useful on the pickup electrode that is connected with the coaxial cable holding wire and reach the input port of the screening electrode that is connected with the coaxial cable shield line and existing subscriber's port of output port, the screening electrode of input port is not entered in the shell with the hole that shell passes shell communicatively respectively, and isolate in the noncapacitive mode with pickup electrode.
In the such scheme, nonconducting outer spacer is arranged between input port and the shell hole wall, the screening electrode that enters the input port in the shell is connected the two poles of the earth of a sheet feedthrough capacitor, the sheet feedthrough capacitor is the sheet of hexagonal or square or other shape, circle is and the screwed screening electrode utmost point tied of spiral shell mutually in screwed
Above-mentioned anti-interference and can prevent the television system bidirectional user port that leaks electricity, output port has two or more.
Above-mentioned anti-interference and can prevent the television system bidirectional user port that leaks electricity, input port and output port partly are the F type docking apparatus of standard in the outside of shell, or other docking apparatus that has improved.
In technique scheme of the present invention, input port separates with shell, during combination, between input port and shell, have nonconducting outside spacer.Outer spacer internal diameter is greater than the portmask polar diameter.
The fixed form of input port on shell is that nut is fastening.The branch that nut in shell exterior nut cap and the shell is arranged again here.When the inner branch of external diameter＞shell aperture＞screening electrode shell external diameter was divided in screening electrode shell outside, screening electrode was penetrated outward in the shell by shell, and fastening nut is positioned at shell, screws on the external screw thread of part in the screening electrode shell, thereby tightens up port.When the outside branch of external diameter＞shell aperture＞screening electrode shell external diameter is divided in screening electrode shell inside, port is by passing in the shell outside the shell, fastening nut is positioned at outside the shell, screw on the external screw thread of part outside the screening electrode shell, thereby tighten up port, also can in screening electrode middle part or shell, the outstanding round platform of diameter greater than the shell aperture be set the bottom of part, realize that the interior nut of shell is fastening or the shell exterior nut cap is fastening.
If adopt input port to be connected to the form of a sheet punching independent capacitance, the interior circle that then can make the sheet feedthrough capacitor is a utmost point and is threaded, thereby screw on the external screw thread of part in the screening electrode shell that passes the shell hole, here, the outside outstanding round platform diameter of external diameter or the middle part＞shell aperture of dividing of screening electrode shell, both finished being connected of screening electrode and electric capacity, again port had been fastened on the shell.At this moment, adopt nut in the aforesaid shell can realize being connected of screening electrode and electric capacity too and port is fastened at function on the shell.
In the such scheme, output port has two or more.Input port and output port the two partly be the F type docking apparatus of standard in the outside of shell, or other docking apparatus that has improved.
Of the present invention anti-interference and can prevent that the another kind of scheme of the television system bidirectional user port that leaks electricity from being, to comprising the metallic shield shell of integral structure, place the circuit board in the shell, input port and output port existing subscriber port, input port is made up of one section coaxial wire and a docking apparatus, coaxial wire does not enter in the shell with the hole that shell passes shell communicatively, the associated contacts welding of holding wire and circuit board, shielding conductor and holding wire are isolated in the noncapacitive mode, and the far-end that coaxial wire is stayed the part of housing exterior is the docking apparatus that the F type docking apparatus of standard or other have improved.
Above-mentioned anti-interference and can prevent the television system bidirectional user port that leaks electricity, between the hole wall as the coaxial wire of input port and shell nonconducting spacer is arranged.
Common key point is exactly that the shielding conductor or the screening electrode of input is not connected with screening can in various technical schemes of the present invention, and isolates in the noncapacitive mode with holding wire or pickup electrode in screening can.Like this, even television set or set-top box generation circuit problem and alternating current is sent the signal or the pickup electrode of the output that imports user port into, electric current also can not import shielding conductor or screening electrode in user port, can not make the metallic shield outer casing electrification of user port, just can not make the outside charged of the television set that is connected with shielding conductor or set-top box yet, injure thereby this machine user of making avoids electricity.In like manner, electric current can not pass logical whole network and huge numbers of families' shielded metal shell, television set and set-top box outside by shielding conductor, also just can not cause electric current to threaten the life security of all users and related personnel in the network system because of the circuit problem of certain user's television set and set-top box.
As mentioned above, even on holding wire or the pickup electrode band powerful alternating current, shielding conductor can be not charged therefrom and seal in circuit yet, by shielding conductor and metallic shield shell form shielding harness still with circuit effectively isolator, bringing into play shielding action fully, avoid various radio waves and noise signal to seal in cable television system and digital television system, get rid of and disturb, guarantee the good view reception effect of each user of system.
Therefore, user port provided by the invention has reliably, determines, even anti-interference that under television set and set-top box circuit abnormality situation, also exists and the function that prevents to leak electricity, no matter in digital television system still is the network of simulated television system cable TV, can both guarantee user's personal safety and good view reception effect, overcome the deficiency of prior art, realize its intended purposes.
Second kind of technical scheme of the present invention is owing to added one section coaxial wire at input, thereby make the coaxial cable of reserving when docking apparatus can be moved suitable position and subscriber household finishing to assemble, line stays weak point or stays long problem when having overcome house decoration, overcome the difficulty of inconvenient bending, also solved the user simultaneously now when utilizing the coaxial cable of reserving to assemble, needed sometimes to bend coaxial cable and F joint and coaxial cable are separated or the problem of loose contact.
Description of drawings:
Fig. 1 is the schematic diagram of the concrete form of first kind of technical scheme of the present invention;
Fig. 2 is the profile of the spacer of the outstanding annular post of band;
Fig. 3 uses the schematic diagram of the concrete form of the docking apparatus that has improved;
Fig. 4 is the schematic diagram of the concrete form of second kind of technical scheme of the present invention;
Fig. 5 is the circuit diagram of three output ports of an input port of the present invention.
Embodiment:
The invention will be further described below in conjunction with embodiment.
Embodiment 1: as Fig. 1, a F type out splice going splice (4) is arranged on the Al-alloy metal shell (1), in circuit board (2) is arranged, electric capacity (12) is arranged on the circuit board, the outer part of the shell of input port (3) has an outstanding round platform, this round platform diameter is greater than the aperture of hole (9), and shape such as Fig. 2 of outer spacer (10), outstanding annulus post fill in the hole (9) of metal-back (1) from outside to inside.Input port (3) passes the hole of outer partition (10) from outside to inside, part all has external screw thread in outer part of the shell of input port (3) and the shell, the interior circle of sheet feedthrough capacitor (11) is a utmost point and is threaded, sheet feedthrough capacitor (11) is screwed on the external screw thread of part in the screening electrode that passes the shell hole (7) shell, both finished being connected of screening electrode (7) and electric capacity (11), port had been fastened on the shell (1) again.The two poles of the earth of the electric capacity (12) that the pickup electrode (5) of input port (3) and the pickup electrode (6) of output port (4) are connected to respectively.
Embodiment 2: overall structure is identical with embodiment 1, unique difference be the outer part of the shell of input port (3) and output port (4) adopted improvement shown in Figure 3 docking apparatus.On this docking apparatus that has improved, porose on the outer layer metal screen (13), intercellar layer plastics layer porose (14) is used to connect on the bosom metal spring leaf of coaxial cable holding wire and also has the screw that matches with screw (15), and the cap of screw (15) has translot.At first unscrew screw (15), after the coaxial cable signal inserts, screw screw (15) again, screw (15) promptly leans the holding wire that inserts on metal spring leaf, and exert pressure, the holding wire of insertion is firmly contacted with metal spring leaf, reach the effect that reliable connection is difficult for getting loose.
Embodiment 3: as shown in Figure 4, coaxial cable (16) integral body is passed the hole (9) of metal shielding (1), holding wire (18) welding lead, the other end of lead is welded in a utmost point of electric capacity (12) in the circuit board (2), the pickup electrode (6) of another utmost point of electric capacity (12) and output port (4) joins, shielding conductor (19) is also welding a section lead, the other end of this section lead is welded in a utmost point of electric capacity in the circuit board (20), another utmost point of electric capacity (20) is connected to metal shielding (1) by a section lead, coaxial cable (16) respectively blocks with an insulation card (21) in the inside and outside both sides near shielding case (1), thereby realize fixed-site and insulation with shielding case (1), coaxial cable (16) can not be extracted out from hole (9) or fill in, the nonconducting spacer (22) that has withstand voltage insulating material to make between coaxial cable (16) and hole (9), coaxial cable (16) are positioned at the F type docking apparatus (17) that the outer port partly of shell is connecting standard.
Embodiment 4: the mode by embodiment 1 forms an input port and three output ports, circuit board (2) adopts circuit diagram shown in Figure 5, signal is from the input of IN end, from 3 output outputs, be respectively TV (television set), DATA (data modem unit interactive TV), FM (FM receiver), data terminal wherein and input are two-way.In the circuit diagram, T1, T2, T3, T4 adopt " whole integrated magnetic core block ", C1 is with the series connection of the transmission circle T1 on the magnetic core block, ground connection after the common port of transmission coil joins with C2, the public head that T1 transmits coil links to each other with coil T3 common port, and the T3 coil is received the common port of T2, T4 after with resistance R 3 parallel connections more respectively with the R3 two ends.
Claims (6)
1. anti-interference and can prevent the television system bidirectional user port that leaks electricity, the metallic shield shell (1) that comprises integral structure, place the circuit board (2) in the shell (1), input port (3) and output port (4), all be useful on pickup electrode (5) (6) that is connected with the coaxial cable holding wire and the screening electrode (7) (8) that is used for being connected on input port (3) and the output port (4) with the coaxial cable shield line, it is characterized in that: the screening electrode (7) of input port (3) does not enter in the shell (1) with the hole (9) that shell (1) passes shell (1) communicatively, and isolates in the noncapacitive mode with pickup electrode (5) (6).
2. according to claim 1 anti-interference and can prevent the television system bidirectional user port that leaks electricity, it is characterized in that: input port, (3) and shell, (1) hole, nonconducting outer spacer is arranged between the hole wall (9), (10), the screening electrode that enters the input port in the shell is connected a sheet feedthrough capacitor, (11) the two poles of the earth, the sheet feedthrough capacitor, (11) be the sheet of hexagonal or square or other shape, circle is and screwed screening electrode in screwed, (7) utmost point of phase spiral shell knot
3. according to claim 1 anti-interference and can prevent the television system bidirectional user port that leaks electricity, it is characterized in that: output port (4) has two or more.
4. according to claim 1 anti-interference and can prevent the television system bidirectional user port that leaks electricity, it is characterized in that: input port (3) and output port (4) partly are the F type docking apparatus of standard in the outside of shell (1), or other docking apparatus that has improved.
5. anti-interference and can prevent the television system bidirectional user port that leaks electricity, the metallic shield shell (1) that comprises integral structure, place the circuit board (2) in the shell (1), input port (3) and output port (4), it is characterized in that: input port (3) is made up of one a section coaxial wire (16) and a docking apparatus (17), coaxial wire (16) does not enter in the shell (1) with the hole (9) that shell (1) passes shell (1) communicatively, holding wire (18) is connected with the associated contacts of circuit board (2), shielding conductor (19) and holding wire (18) are isolated in the noncapacitive mode, and the far-end that coaxial wire (16) is stayed the outside part of shell (1) is the docking apparatus (17) that the F type docking apparatus of standard or other have improved.
6. according to claim 5 anti-interference and can prevent from the television system bidirectional user port that leaks electricity to it is characterized in that: between the hole wall in the hole (9) of coaxial wire (16) and shell (1) nonconducting spacer (22) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100484796A CN100536557C (en) | 2007-02-08 | 2007-02-08 | Anti-interference television system bidirectional user port capable of preventing creepage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100484796A CN100536557C (en) | 2007-02-08 | 2007-02-08 | Anti-interference television system bidirectional user port capable of preventing creepage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101198001A true CN101198001A (en) | 2008-06-11 |
| CN100536557C CN100536557C (en) | 2009-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100484796A Active CN100536557C (en) | 2007-02-08 | 2007-02-08 | Anti-interference television system bidirectional user port capable of preventing creepage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100536557C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176744A (en) * | 2011-03-25 | 2011-09-07 | 深圳市同洲电子股份有限公司 | Wired signal access circuit of digital television receiving terminal |
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
-
2007
- 2007-02-08 CN CNB2007100484796A patent/CN100536557C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176744A (en) * | 2011-03-25 | 2011-09-07 | 深圳市同洲电子股份有限公司 | Wired signal access circuit of digital television receiving terminal |
| CN106210595A (en) * | 2012-11-22 | 2016-12-07 | 江苏华兴电子有限公司 | For guaranteeing the antenna isolator of high-frequency signal transmission quality |
| CN106210595B (en) * | 2012-11-22 | 2018-12-07 | 江苏华兴电子有限公司 | For ensuring the antenna isolator of high-frequency signal transmission quality |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100536557C (en) | 2009-09-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Application publication date: 20080611 Assignee: Guilin Chuanglin Electronic Science & Technology Development Co., Ltd. Assignor: Mo Shenglin Contract record no.: 2009450000093 Denomination of invention: Anti-interference television system bidirectional user port capable of preventing creepage Granted publication date: 20090902 License type: Exclusive License Record date: 20091106 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170301 Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin Qixing District empty Ming Road, building 5, No. 42 Patentee after: Guilin Chuanglin Electronic Science & Technology Development Co., Ltd. Address before: Lucy's high tech Zone can Guilin 541004 the Guangxi Zhuang Autonomous Region No. 2 Lane 8 Building 1 unit 2-1 Patentee before: Mo Shenglin |