CN203590347U - TV tuner assembly - Google Patents
TV tuner assembly Download PDFInfo
- Publication number
- CN203590347U CN203590347U CN201320606193.6U CN201320606193U CN203590347U CN 203590347 U CN203590347 U CN 203590347U CN 201320606193 U CN201320606193 U CN 201320606193U CN 203590347 U CN203590347 U CN 203590347U
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- Prior art keywords
- tuner
- radome
- isolator
- antenna
- coaxial plug
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a TV tuner subassembly, including antenna coaxial plug, isolator and tuner shield cover. The tuner shielding cover is provided with a connecting hole, and the antenna coaxial plug is inserted into the connecting hole of the tuner shielding cover after being extended; the isolator comprises a metal shell and an isolating layer, and the metal shell is fixedly connected with the edge of the connecting hole; the isolation layer sets up in the metal casing inboard and encircles in the antenna coaxial plug extension outside, keeps apart antenna coaxial plug and metal casing and tuner shield cover through the isolation layer. The utility model provides a TV set tuner subassembly has all-round external shielding, simple installation's advantage to guarantee the radio frequency signal's that television antenna inserts transmission quality.
Description
Technical field
The utility model relates to television structure technical field, relates in particular to a kind of television tuner assembly.
Background technology
Tuner, is commonly called as tuner (Tuner), is that television set is used for receiving high-frequency signal and demodulates a kind of device of video information.The effect of tuner is exactly that faint vision signal is amplified, and processes transmitting the unstable anamorphose causing and interference, thereby the performance of tuner has determined the stability of image.But tuner itself is very easy to be subject to electromagnetic interference, therefore built-in television card generally can be at tuner coated outside layer of metal layer, with shield electromagnetic interference.
It is the television system that combines to transmit, distribute and exchange sound, image and data-signal with radio frequency cable, optical cable, multichannel microwave distribution system or its that cable television system is also called cable TV (Cable Television, abbreviation CATV).The ground connection of cable TV be generally with power supply be connected together, and the TV signal ground connection of cable television system output is generally the metal shell of Set Top Box, so when their current potential is unequal, electric current will flow to electronegative potential point from high potential point, produce interference signal, even cause cable TV heating or produce fault.< < GB8898-2011 audio frequency, video and the similar electronic equipments safety according to China, carried out require > >, answer the requirement of satisfying basic insulation resistance between cable TV antenna coaxial socket and protective earthing circuit.
The radiofrequency signal of cable TV antenna coaxial transmission is easily subject to external interference, therefore needs to isolate external interference by antenna coaxial plug and radome are set.But in order to meet satisfying basic insulation resistance requirement between cable TV antenna coaxial socket and ground protection circuit simultaneously; prevent the generation of accident accident, the solution of prior art is to add isolator between the two at antenna coaxial socket and tuner radome.As the publication number Chinese patent that is CN202364309U, reload signal capacitance between the heart yearn of cable television system signal output terminal and the heart yearn of the signal input terminal of cable TV, between the screen (the TV signal earth connection of cable television system output) of cable television system signal output terminal and the screen (ground wire of cable TV) of the signal input terminal of cable TV, install ground wire capacitance additional, isolate unimpeded that the earth terminal of cable TV and the ground wire current potential of the TV signal earth terminal of cable television system output inhibit signal is connected.
But the isolator that existing solution is added between antenna coaxial socket and tuner radome, causes the radiofrequency signal of cable TV antenna transmission to be easily subject to external interference.Its Causing Factors is mainly: add after described isolator, it is outside exposed that video rf signal line is understood some circuit between tuner radome and antenna coaxial socket, cause the radiofrequency signal of tuner transmission to be easily subject to external interference, cause radiofrequency signal Quality Down.
Summary of the invention
Technical problem to be solved in the utility model is, a kind of television tuner assembly is provided, and both made satisfying basic insulation resistance requirement between antenna coaxial socket and ground protection circuit, also guarantees the transmission quality of television set radiofrequency signal.
For solving above technical problem, the utility model embodiment provides a kind of television tuner assembly, comprising:
Access the antenna coaxial plug of wired television video frequency signal to radio frequency telegon;
The noise of radio-frequency tuner is disturbed to the tuner radome shielding;
And, by the isolator of described antenna coaxial plug and described tuner radome partition;
Wherein, described tuner radome is provided with a connecting hole, after described antenna coaxial plug extends, interts in the connecting hole of described tuner radome;
Described isolator comprises metal shell and separator, being connected and fixed along limit of described metal shell and described connecting hole; Described separator is arranged on described inside of metal outershell and is looped around outside, described antenna coaxial plug extension, by described separator, described antenna coaxial plug and described metal shell and described tuner radome is isolated.
Further, described antenna coaxial plug comprises coaxial socket, antenna casing and video signal cable;
Described coaxial socket and described video signal cable are arranged in described antenna casing, and one end of described video signal cable interts in described coaxial socket, after the other end extends, intert in the connecting hole of described tuner radome;
Described antenna casing extends a day wire pin, and by described day wire pin, described antenna coaxial plug is nested in the connecting hole of described tuner radome;
The separator of described isolator is looped around the outside of the extension of described antenna casing, to cut off described antenna casing, is connected with metal shell and the direct of described tuner radome of described isolator.
Preferably, described isolator also comprises block capacitor;
Described block capacitor is arranged between the sky wire pin and the metal shell of described isolator of described antenna casing.
Further, described antenna coaxial plug also comprises that one is arranged on the insulating barrier between described antenna casing and described video signal cable.
Preferably, the metal shell of described isolator is annular outer cover.
Described tuner radome is provided with at least one riveting set, by described riveting set, the position of described isolator is fixed.
Described tuner radome is cube shaped metallic shield.
The television tuner assembly that the utility model embodiment provides, to between antenna coaxial plug and tuner radome, an isolator be set, and this isolator is looped around the outside, extension of described antenna coaxial plug, at antenna casing, arrange separator, and a metal shell is set by after separator encirclement, be nested between antenna coaxial plug and tuner radome.Therefore; whole television tuner assembly surface is metal shielding; form full-shield tuner shell; can effectively resist the interference of external signal noise; and separator in isolator can be used as the insulation resistance between television antenna coaxial socket and protective earthing circuit; with protection TV SKD, normally work, can improve the transmission quality of television video signal.
Accompanying drawing explanation
Fig. 1 is the structure cutaway view of an embodiment of the television tuner assembly that provides of the utility model;
Fig. 2 is the end view of the television tuner assembly that provides of Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
Referring to Fig. 1, it is the structure cutaway view of an embodiment of the television tuner assembly that provides of the utility model.
In the present embodiment, described television tuner assembly comprises:
Access the antenna coaxial plug 100 of wired television video frequency signal to radio frequency telegon;
The noise of radio-frequency tuner is disturbed to the tuner radome 200 shielding;
And, by the isolator 300 of described antenna coaxial plug and described tuner radome partition.
Wherein, described tuner radome 200 is provided with a connecting hole 201, after described antenna coaxial plug 100 extends, interts in the connecting hole 201 of described tuner radome 200.
Described isolator 300 comprises metal shell 301 and separator 302, and described metal shell 301 is connected and fixed along limit with described connecting hole 201; Described separator 302 is arranged on described metal shell 301 inner sides and is looped around described antenna coaxial plug 100 outsides, extension, by described separator 302, described antenna coaxial plug 100 is isolated with described metal shell 301 and described tuner radome 200.
In the present embodiment, described antenna coaxial plug 100 is for accessing the vision signal of cable TV, and by this video signal transmission to TV SKD PCB(Printed Circuit Board) high frequency tuner circuit unit.And the effect of tuner radome 200 is the interference to the high frequency tuner circuit unit on PCB of shielding outer signals.
Further, described antenna coaxial plug 100 comprises coaxial socket 101, antenna casing 102 and video signal cable 103.
Described coaxial socket 101 is arranged in described antenna casing 102 with described video signal cable 103, and intert in described coaxial socket 101 one end of described video signal cable 103, after extending, interts in the connecting hole 201 of described tuner radome 200 other end.
Described antenna casing 102 extends a day wire pin and (as the pin a in Fig. 1 and b), and by described day wire pin a and b described antenna coaxial plug 100 is nested in the connecting hole 201 of described tuner radome 200.
The separator 302 of described isolator 300 is looped around the outside of the extension of described antenna casing 102, to cut off described antenna casing 102, is directly connected with metal shell 301 and the described tuner radome 200 of described isolator 300.
Particularly, under the partition of the separator 302 that described antenna coaxial plug 100 is filled in isolator 300 by described sky wire pin a and b, with described nested connection of tuner radome 300.
Preferably, described isolator 300 also comprises block capacitor; Described block capacitor is arranged between the sky wire pin (a and b essence are one) and the metal shell 301 of described isolator 300 of described antenna casing 102.
In the present embodiment, the effect of isolator 300 is to cut off antenna casing 102 to be connected with metal shell 301 and the direct of tuner radome 200 of isolator 300.During concrete enforcement, in order to meet the safety requirements of television set, protection TV SKD PCB, need to be connected to the earth by the metal shell 301 of antenna casing 102, tuner radome 200 and isolator 300.Because antenna coaxial plug 100 is connected with the VT of outside cable television system by coaxial socket 101, during the video signal source of its access, if during the level of signal height difference, will cause the generation of direct current, thereby generation heat.If now antenna casing 102 is directly connected with metal shell 301 or tuner radome 200, direct current will flow into TV SKD PCB, and the heat that this direct current produces will cause TV SKD PCB heating even to be burnt.
Therefore, in the present embodiment, when in the different signal source of access level, need to antenna casing 102 and tuner radome 200 be kept apart by isolator 300.Particularly, described separator 302 can be capacitance material layer, and when having direct current signal circulation on antenna casing 102, this DC current signal is isolated 302, layer and cuts off, thereby cannot transfer to tuner radome 200.Further, the vision signal high frequency ac signal often accessing due to antenna coaxial plug 100, and capacitance has the ability of AC signal transmission, therefore, for the vision signal accessing for antenna coaxial plug 100, antenna casing 102 is connected again intercommunication with tuner radome 200.In a word, the object of the setting of isolator 300 is for fear of cause TV SKD fault because the different direct current signals that produce of signal source level transfer to TV SKD, guarantee the normal transmission of vision signal simultaneously.
In the present embodiment, at isolator 300 outer setting metal shells 301, can further avoid the interference of external signal, improve the transmission quality of vision signal.
Preferably, described tuner radome 200 is cube shaped metallic shield.It should be noted that, the shape of the tuner radome 200 that the utility model provides includes but not limited to cubic shaped.During concrete enforcement, tuner radome 200 is for being welded on TV SKD PCB(Printed Circuit Board) high frequency tuner circuit unit, to shield the interference of outer signals to the harmony amplifying circuit on PCB.Wherein, television set pcb board is provided with ground wire, the utility model provide for the antenna casing 102 of antenna coaxial plug 100 that accesses radio-frequency signal of wired TV as the earth terminal of antenna coaxial plug 100.And tuner radome 200 passes through the partition of described isolator 300, independent grounding with described antenna casing 102.Therefore, avoid, because signal source current potential does not wait and causes that direct current flows to low level from high level, finally flowing into television set PCB mainboard, cause the situations such as TV SKD heating and occur.
Preferably, described antenna coaxial plug 100 also comprises that one is arranged on the insulating barrier 104 between described antenna casing 102 and described video signal cable 103.。By the setting of insulating barrier 104, further strengthen the antijamming capability of described television tuner assembly.
Fig. 2 is the end view of the television tuner assembly that provides of Fig. 1.
Preferably, the metal shell 301 of described isolator 300 is annular outer cover.Because antenna coaxial plug 100 is annulus socket, by the metal shell of isolator 300 301, can be convenient to nested by isolator 300 and antenna coaxial plug 100, improve the convenience that device is installed.Particularly, because antenna coaxial plug 100 is cylindrical member, the metal shell 301 of isolator 300 preferably adopts the structure of cylinder annular, is arranged on connecting hole 301 nested with described antenna coaxial plug 100 and isolator 300 on tuner radome 200 and is preferably set to the jack of annular.
Further, described tuner radome 200 is provided with at least one riveting set 202, by described riveting set 202, the position of described isolator 300 is fixed.
Particularly, tuner radome 200 is also provided with multiple pins 203, and the television tuner assembly that the utility model provides can be pegged graft and is welded on television set PCB mainboard by described pin 203.
The television tuner assembly that the utility model provides; by antenna coaxial plug and spatially mutually nested connection of cube radome; omnibearing to external shield to guarantee; simultaneously; in nested junction; it is the extension of antenna coaxial plug; the two is isolated with separator; and at separator, one metal shell is set outward and shields external interference signals, to guarantee that the basic insulation resistance between television antenna coaxial socket and protective earthing circuit requires and improve the transmission quality of vision signal.The television tuner assembly that the utility model provides has comprehensive to external shield, easy-to-install advantage; realized the circuit protection to TV SKD; guarantee the fail safe of TV SKD, and improved the transmission quality of the vision signal of television antenna access.
The above is preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection range of the present utility model.
Claims (7)
1. a television tuner assembly, is characterized in that, comprising:
Access the antenna coaxial plug of wired television video frequency signal to radio frequency telegon;
The noise of radio-frequency tuner is disturbed to the tuner radome shielding;
And, by the isolator of described antenna coaxial plug and described tuner radome partition;
Wherein, described tuner radome is provided with a connecting hole, after described antenna coaxial plug extends, interts in the connecting hole of described tuner radome;
Described isolator comprises metal shell and separator, being connected and fixed along limit of described metal shell and described connecting hole; Described separator is arranged on described inside of metal outershell and is looped around outside, described antenna coaxial plug extension, by described separator, described antenna coaxial plug and described metal shell and described tuner radome is isolated.
2. television tuner assembly as claimed in claim 1, is characterized in that, described antenna coaxial plug comprises coaxial socket, antenna casing and video signal cable;
Described coaxial socket and described video signal cable are arranged in described antenna casing, and one end of described video signal cable interts in described coaxial socket, after the other end extends, intert in the connecting hole of described tuner radome;
Described antenna casing extends a day wire pin, and by described day wire pin, described antenna coaxial plug is nested in the connecting hole of described tuner radome;
The separator of described isolator is looped around the outside of the extension of described antenna casing, to cut off described antenna casing, is connected with metal shell and the direct of described tuner radome of described isolator.
3. television tuner assembly as claimed in claim 2, is characterized in that, described isolator also comprises block capacitor;
Described block capacitor is arranged between the sky wire pin and the metal shell of described isolator of described antenna casing.
4. television tuner assembly as claimed in claim 2 or claim 3, is characterized in that, described antenna coaxial plug also comprises that one is arranged on the insulating barrier between described antenna casing and described video signal cable.
5. television tuner assembly as claimed in claim 4, is characterized in that, the metal shell of described isolator is annular outer cover.
6. television tuner assembly as claimed in claim 5, is characterized in that, described tuner radome is provided with at least one riveting set, by described riveting set, the position of described isolator is fixed.
7. television tuner assembly as claimed in claim 6, is characterized in that, described tuner radome is cube shaped metallic shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606193.6U CN203590347U (en) | 2013-09-29 | 2013-09-29 | TV tuner assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320606193.6U CN203590347U (en) | 2013-09-29 | 2013-09-29 | TV tuner assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590347U true CN203590347U (en) | 2014-05-07 |
Family
ID=50588188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320606193.6U Expired - Lifetime CN203590347U (en) | 2013-09-29 | 2013-09-29 | TV tuner assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590347U (en) |
-
2013
- 2013-09-29 CN CN201320606193.6U patent/CN203590347U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190305 Address after: Room 802, Building 6 (1) of Yunpu Fourth Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU LIUHUAN INFORMATION TECHNOLOGY CO.,LTD. Address before: 510663, 4, No. 192, Ke Zhu Road, science and Technology City, Guangzhou high tech Industrial Development Zone, Guangdong Patentee before: Guangzhou Shiyuan Electronic Technology Company Limited |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |
|
| CX01 | Expiry of patent term |