CN103237183A - Television with antenna isolator - Google Patents
Television with antenna isolator Download PDFInfo
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- CN103237183A CN103237183A CN2012104784432A CN201210478443A CN103237183A CN 103237183 A CN103237183 A CN 103237183A CN 2012104784432 A CN2012104784432 A CN 2012104784432A CN 201210478443 A CN201210478443 A CN 201210478443A CN 103237183 A CN103237183 A CN 103237183A
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- radome
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Abstract
The invention relates to a television which comprises a tuner assembly. The tuner assembly comprises a tuner unit circuit and the antenna isolator connected with a signal input end of the tuner unit circuit; the tuner unit circuit is arranged in an outer shielding case; and the antenna isolator comprises a pair of shielding cases, opening ends of the shielding cases are opposite to each other to form a shielding cavity, a shielding layer connector is arranged on the outer side of one of the shielding cases, and a rear port of the other shielding case is connected with an opening of the front end of the outer shielding case. The television has the advantages that the antenna isolator in the tuner assembly is provided with capacitors which are leadless capacitors or chip capacitors, the television is low in line loss, high-frequency characteristics of transmitted signals can be guaranteed, reflow soldering can be implemented beneficially, manual soldering is omitted, the television is suitable for batch production, and effects of high batch production efficiency, low cost and good consistency of products are realized.
Description
Technical field
The present invention relates to the technical field of television set, specifically is a kind of television set of avoiding damaging when having being suitable for that TV signal cable externally is struck by lightning or being short-circuited accident with the external power circuit of antenna isolator.Simultaneously, the antenna isolator is used for guaranteeing the transmission quality of high-frequency signal.
Background technology
Television set comprises tuner (being commonly called as tuner), be that television set is used for receiving high-frequency signal and a kind of device that demodulates video information, existing tuner generally is divided into digital signal tuner (being called for short digital tuner) and analog signal tuner (being called for short the simulation tuner).
The effect of numeral tuner is the receiving digital television high-frequency signal, going forward side by side, the line frequency road is selected and high-frequency signal amplifies and frequency-conversion processing, some also is with intermediate-freuqncy signal to amplify and the high-frequency digital signal demodulation function, high-frequency digital signal is after demodulation, the digital signal of output is TS stream (also being transport stream), it is to be the digital data transmission stream of unit with " frame ", contains signals such as synchronous head, data, ending in each frame of digital signal; According to the modulation system that receives high-frequency digital signal, digital tuner also divides QPSK(Quadrature Phase Shift Keying quadrature keying phase modulation) modulation tuner and QAM(Quadrature Amplitude Modulation quadrature amplitude modulation) the modulation tuner.QPSK modulation tuner is mainly used in satellite TV signal and receives; QAM modulation tuner is mainly used in cable TV signal and receives.The effect of simulation tuner is to receive the simulated television high-frequency signal, going forward side by side, the line frequency road is selected, high-frequency signal amplifies and frequency-conversion processing, the simulation tuner generally is not with intermediate-freuqncy signal to amplify and the high-frequency signal demodulation function, so simulated television also needs to add in addition an intermediate frequency amplifier and high-frequency signal demodulator again.Circuit such as the reception of general analog high frequency, amplification, demodulation all need the strict requirement that just can meet complete machine of adjusting, therefore be difficult to high-frequency signal receive, functions such as amplification, demodulation are all finished by tuner, therefore the main task master who simulates tuner is the frequency-selecting road, the another one task is exactly frequency reducing, the high-frequency signal that receives is reduced on the fixed frequency, this fixed frequency signal is exactly intermediate-freuqncy signal, and its frequency is generally 38MHz.
The ground connection of cable TV generally be with power supply be connected together, and the TV signal ground connection of cable television system output generally is the metal shell of set-top box, so when their current potential is unequal (such as outside TV signal cable be struck by lightning or with the external power circuit accident that is short-circuited), electric current will flow to the electronegative potential point from the high potential point, produces to disturb even cable TV heating or cable TV spontaneous combustion.For addressing this problem, someone proposes to install capacitance additional between the signal input terminal of cable television system signal output terminal and cable TV, isolate both the ground wire current potential and inhibit signal connect unimpeded, between the heart yearn (holding wire) of the signal input terminal of the heart yearn (holding wire) of cable television system signal output terminal and cable TV, install the signal capacitance of a 2200pF or 1000pF additional, between the screen (ground wire of cable TV) of the signal input terminal of the screen (the TV signal earth connection of cable television system output) of cable television system signal output terminal and cable TV, install the ground wire capacitance of a 2200pF or 1000pF additional.
Chinese patent literature CN 202364309U, a kind of television antenna isolator is disclosed, second coaxial slicing ear that it has housing, circuit board, can plug first coaxial slicing ear with the signal input terminal of cable TV and can plug with the cable television system signal output terminal; This circuit board is installed in this housing, and two axle splicing ears are installed in respectively on the sidewall of this housing; The signal capacitance is serially connected between the heart yearn of two coaxial slicing ear on this circuit board; Three ground wire capacitances are parallel with one another and be serially connected with between the front side of screen of two coaxial slicing ear on this circuit board; In addition three ground wire capacitances are parallel with one another and be serially connected with between the rear side of screen of two coaxial slicing ear on this circuit board.
Above-mentioned the deficiencies in the prior art part is: circuit board adopts artificial welding with being connected of each electric capacity, and mass production efficient is lower and cost is higher, and artificial welding easily causes homogeneity of product relatively poor; Small product size is big, is unfavorable for being directly installed in the television set.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of television set of avoiding damaging when being suitable for that TV signal cable externally is struck by lightning or being short-circuited accident with the external power circuit.
For solving the problems of the technologies described above, the invention provides a kind of television set, comprise the tuner assembly, this tuner assembly comprises: tuner element circuit, the antenna isolator that links to each other with the signal input part of this tuner element circuit; The tuner element circuit is located in the external shield.
This antenna isolator comprises: openend is oppositely arranged, to constitute a pair of radome of a shielding cavity, and the outside of one of them radome is provided with the screen joint, and the rear port of another radome links to each other with the front opening of described external shield.
Be fixed with the heart yearn joint in this screen joint, be provided with a plurality of ground wire capacitances and a signal capacitance in the described a pair of radome; One electrode of this signal capacitance links to each other with described heart yearn joint, and the rear port that another electrode passes described another radome links to each other with the signal input part of described tuner element circuit; Described ground wire capacitance is no lead capacitance or patch capacitor; The two poles of the earth of this ground wire capacitance are in its rear and front end, and adopt tin cream through the mode of Reflow Soldering respectively with described a pair of radome on through hole be weldingly connected.
As further preferred scheme, described signal capacitance is no lead capacitance or patch capacitor; The two poles of the earth of described signal capacitance are in its rear and front end, and one of them electrode adopts tin cream to link to each other with the medial extremity of described heart yearn joint through the mode of Reflow Soldering.
As further preferred scheme, for ease of fixing tin cream, be arranged with a plurality of through holes on the described a pair of radome; The two poles of the earth of described each ground wire capacitance respectively with described a pair of radome on through hole be weldingly connected.
Through hole on the described large and small radome is located at corresponding pit central authorities, is beneficial to when assembling, adopts tin cream that two electrodes of each electric capacity are linked to each other with installing hole on the large and small radome respectively, carries out Reflow Soldering then.
For improving shield effectiveness, described a pair of radome is respectively large and small radome; The openend of little radome stretches in the opening of described big radome.
Be provided with between the described large and small radome for installing rack fixing described each ground wire capacitance and signal capacitance, that adopt insulating material to make, with when assembling, with each electric capacity installing rack of packing into, be beneficial to and improve efficiency of assembling and reliability, the insulation between the large and small radome of double as.
The outer rim of contiguous described installing rack is provided with slot; the edge part of described little radome is pegged graft and is fixed in this slot; described big radome fixed cover is located on the outer rim of described installing rack; and then large and small radome and installing rack have been fixed; and then before implementing Reflow Soldering; just fix each parts, be beneficial to the reliability of guaranteeing Reflow Soldering, and then be beneficial to the guarantee homogeneity of product.
Described large and small radome ringwise or rectangle.
The production method of above-mentioned antenna isolator is characterized in that comprising the steps:
(1), on two electrodes of each electric capacity or at each through hole of described large and small radome, fixedly installs tin cream;
(2), described large and small radome level is oppositely arranged, and described screen joint arranges down, and each ground wire capacitance is located at respectively between the many groups of relative through holes on the described large and small radome, described signal capacitance is located on the medial extremity of described screen joint;
(3), send into reflow soldering apparatus, finish welding.
As preferred embodiment, in the described step 2, before described large and small radome level is oppositely arranged, also comprise: between described large and small radome, installing rack is set, then each ground wire capacitance and signal capacitance are put into the installing hole of this installing rack, the edge part of described little radome is pegged graft be fixed in the slot of this installing rack simultaneously.
The technique effect that the present invention has: the electric capacity that the antenna isolator in (1) television tuner assembly of the present invention adopts all is no lead capacitance or patch capacitor, line loss is few, can guarantee to transmit the high frequency characteristics of signal, be beneficial to the enforcement Reflow Soldering simultaneously, need not artificial welding, be suitable for mass production, and then reached that mass production efficient is higher, cost is lower and homogeneity of product effect preferably; (2) described large and small radome can adopt stamping parts, and entire product need not pcb board, need not plug-in unit original paper, manual welding, easily ensures homogeneity of product; Simultaneously, the cavity that large and small radome forms is less, and shield effectiveness is better; (3) tuner assembly overall volume is less, overall structure more firmly, not fragile, be suitable for integral body and put into television set.
Description of drawings
Content of the present invention is easier clearly to be understood in order to make, below the specific embodiment and by reference to the accompanying drawings of basis, the present invention is further detailed explanation, wherein
The sectional structure chart of Fig. 1 tuner assembly of the present invention.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
Embodiment 1:
As Fig. 1, the television set of present embodiment comprises the tuner assembly, and this tuner assembly comprises: external shield 2, be located at the tuner element circuit 10 in this external shield 2; The signal input part of this tuner element circuit 10 links to each other with the signal output part of an antenna isolator; This antenna isolator comprises: the large and small radome that openend is oppositely arranged, the openend of little radome 5 stretch in the opening of described big radome 3; The outside of little radome 5 is provided with screen joint 9, is fixed with the heart yearn joint 6 that coaxial line distributes in the screen joint 9, and the rear port of big radome 3 links to each other with the front opening of described external shield 2; Be provided with 4,5 or 6 ground wire capacitances 8 and a signal capacitance 1 in the large and small radome; Be arranged with a plurality of through holes on the large and small radome, each through hole is located at corresponding pit central authorities.
Described ground wire capacitance 8 and signal capacitance 1 are no lead capacitance or patch capacitor; The two poles of the earth of this ground wire capacitance 8 are in its rear and front end, and adopt tin cream 4 through the mode of Reflow Soldering respectively with described large and small radome on through hole be weldingly connected.
The two poles of the earth of described signal capacitance 1 are in its rear and front end, the electrode of its outboard end adopts tin cream to link to each other with the medial extremity of described heart yearn joint through the mode of Reflow Soldering, and the rear port that another electrode passes described big radome 3 links to each other with the signal input part of described tuner element circuit.
Described large and small radome ringwise or square.
As preferred embodiment a kind of, be provided with the installing rack 7 for the plastic material of fixing described each ground wire capacitance 8 and signal capacitance 1 between the described large and small radome.The outer rim of contiguous described installing rack 7 is provided with slot, and the edge part of described little radome 5 is pegged graft and is fixed in this slot, is beneficial to fixing little radome 5.Described big radome 3 fixed covers are located on the outer rim of described installing rack 7, and then have fixed large and small radome and installing rack 7, and then before implementing Reflow Soldering, have just fixed each parts, are beneficial to the reliability of guaranteeing Reflow Soldering, and then are beneficial to the guarantee homogeneity of product.
Embodiment 2:
The production method of the antenna isolator in the television tuner assembly of above-described embodiment 1, it comprises the steps:
A, on two electrodes of each electric capacity or at described large and small radome, fixedly install tin cream;
B, described heart yearn joint are fixed in the screen joint by collets 11, simultaneously, with the medial extremity secure fit of screen joint in the installing hole of described big radome or little radome;
C, described large and small radome level is oppositely arranged, and described screen joint arranges down and (contacts with the tin cream 4 of bottom with the self gravitation that utilizes signal capacitance 1, guarantee to implement Reflow Soldering), and each ground wire capacitance is located at respectively between the many groups of relative through holes on the described large and small radome, described signal capacitance is located on the medial extremity of described screen joint;
D, send into reflow soldering apparatus, finish welding.
As preferred embodiment, among the described step C, before described large and small radome level is oppositely arranged, also comprise: between described large and small radome, installing rack is set, then each ground wire capacitance and signal capacitance are put into the installing hole of this installing rack, the edge part of described little radome is pegged graft be fixed in the slot of this installing rack simultaneously.
Present embodiment obviously, above-described embodiment only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that spirit of the present invention extended out and still are among protection scope of the present invention.
Claims (9)
1. a television set comprises the tuner assembly, it is characterized in that this tuner assembly comprises: tuner element circuit, the antenna isolator that links to each other with the signal input part of this tuner element circuit; The tuner element circuit is located in the external shield;
This antenna isolator comprises: openend is oppositely arranged, to constitute a pair of radome of a shielding cavity, and the outside of one of them radome is provided with the screen joint, and the rear port of another radome links to each other with the front opening of described external shield;
Be fixed with the heart yearn joint in this screen joint, be provided with a plurality of ground wire capacitances and a signal capacitance in the described a pair of radome; One electrode of this signal capacitance links to each other with described heart yearn joint, and the rear port that another electrode passes described another radome links to each other with the signal input part of described tuner element circuit;
Described ground wire capacitance is no lead capacitance or patch capacitor;
The two poles of the earth of this ground wire capacitance are in its rear and front end, and adopt tin cream to be weldingly connected with described a pair of radome respectively through the mode of Reflow Soldering.
2. television set according to claim 1, it is characterized in that: described signal capacitance is no lead capacitance or patch capacitor;
The two poles of the earth of described signal capacitance are in its rear and front end, and one of them electrode adopts tin cream to link to each other with the medial extremity of described heart yearn joint through the mode of Reflow Soldering.
3. television set according to claim 2 is characterized in that: be arranged with a plurality of through holes on the described a pair of radome; The two poles of the earth of described each ground wire capacitance respectively with described a pair of radome on through hole be weldingly connected.
4. according to the described television set of one of claim 1-3, it is characterized in that: the through hole on the described large and small radome is located at corresponding pit central authorities.
5. television set according to claim 4, it is characterized in that: described a pair of radome is respectively large and small radome; The openend of little radome stretches in the opening of described big radome.
6. television set according to claim 5 is characterized in that: be provided with between the described large and small radome for installing rack fixing described each ground wire capacitance and signal capacitance, that adopt insulating material to make.
7. television set according to claim 6 is characterized in that: the outer rim of contiguous described installing rack is provided with slot, and the edge part of described little radome is pegged graft and is fixed in this slot; Described big radome fixed cover is located on the outer rim of described installing rack.
8. the production method of an antenna isolator according to claim 4 is characterized in that comprising the steps:
(1), on two electrodes of each electric capacity or at each through hole of described large and small radome, fixedly installs tin cream;
(2), described large and small radome level is oppositely arranged, and described screen joint arranges down, and each ground wire capacitance is located at respectively between the many groups of relative through holes on the described large and small radome, described signal capacitance is located on the medial extremity of described screen joint;
(3), send into reflow soldering apparatus, finish welding.
9. production method according to claim 8, it is characterized in that: in the described step 2, before described large and small radome level is oppositely arranged, also comprise: between described large and small radome, installing rack is set, then each ground wire capacitance and signal capacitance are put into the installing hole of this installing rack, the edge part of described little radome is pegged graft be fixed in the slot of this installing rack simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478443.2A CN103237183B (en) | 2012-11-22 | 2012-11-22 | There is the television set of antenna isolator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210478443.2A CN103237183B (en) | 2012-11-22 | 2012-11-22 | There is the television set of antenna isolator |
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| Publication Number | Publication Date |
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| CN103237183A true CN103237183A (en) | 2013-08-07 |
| CN103237183B CN103237183B (en) | 2015-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210478443.2A Active CN103237183B (en) | 2012-11-22 | 2012-11-22 | There is the television set of antenna isolator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540246A (en) * | 2020-10-30 | 2021-03-23 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Bounded wave strong electromagnetic pulse simulation system |
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| CN202364309U (en) * | 2011-12-08 | 2012-08-01 | 厦门森晖电子有限公司 | Television antenna isolator |
| CN202907069U (en) * | 2012-11-22 | 2013-04-24 | 李明锁 | Television set with antenna isolator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1090951A (en) * | 1992-11-25 | 1994-08-17 | 汤姆森消费电子有限公司 | The antenna isolation assembly of hot chassis receiver |
| JP2003298337A (en) * | 2002-03-29 | 2003-10-17 | Toko Inc | Tuned type antenna |
| CN201048441Y (en) * | 2007-03-17 | 2008-04-16 | 巢雨 | Safety type high interference immunity wired network television signal connecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540246A (en) * | 2020-10-30 | 2021-03-23 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Bounded wave strong electromagnetic pulse simulation system |
| CN112540246B (en) * | 2020-10-30 | 2022-04-26 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Bounded wave strong electromagnetic pulse simulation system |
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Address after: No.1 Workshop, private industrial park, Xuzhuang street, Gaogang District, Taizhou City, Jiangsu Province Patentee after: JIANGSU HUAXING ELECTRONICS Co.,Ltd. Address before: 213000, Jiangsu City, Changzhou province Jintan city refers to the former town industrial concentration Park Patentee before: JIANGSU HUAXING ELECTRONICS Co.,Ltd. |
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Address after: 1358 Jinsha Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: JIANGSU HUAXING ELECTRONICS Co.,Ltd. Address before: No.1 Workshop, private industrial park, Xuzhuang street, Gaogang District, Taizhou City, Jiangsu Province Patentee before: JIANGSU HUAXING ELECTRONICS Co.,Ltd. |