CN103237188B - Tuner assembly - Google Patents
Tuner assembly Download PDFInfo
- Publication number
- CN103237188B CN103237188B CN201210480831.4A CN201210480831A CN103237188B CN 103237188 B CN103237188 B CN 103237188B CN 201210480831 A CN201210480831 A CN 201210480831A CN 103237188 B CN103237188 B CN 103237188B
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- China
- Prior art keywords
- radome
- capacitance
- tuner
- signal
- ground wire
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Aerials (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Structure Of Receivers (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention relates to a kind of tuner assembly, it comprises: tuner element circuit, the antenna isolator being connected with the signal input part of this tuner element circuit; Tuner element circuit is located in an external shield. This antenna isolator comprises: openend is oppositely arranged, to form a pair of radome of a shielding cavity, and the outside of one of them radome is provided with screen layer joint, and the rear port of another radome is connected with the front opening of described external shield. The electric capacity that antenna isolator in tuner assembly adopts is all without lead capacitance or patch capacitor, line loss is few, can guarantee the high frequency characteristics of signal transmission, be beneficial to enforcement Reflow Soldering simultaneously, without manually welding, be suitable for mass production, and then reach that mass production efficiency is higher, cost is lower and the good effect of homogeneity of product; Radome can adopt stamping parts, and whole product, without pcb board, without plug-in unit original paper, manual welding, easily ensures homogeneity of product.
Description
Technical field
The present invention relates to the parts of television set, specifically a kind of tuner assembly with antenna isolator, antenna isolationDevice is for guaranteeing the transmission quality of high-frequency signal.
Background technology
Tuner: being commonly called as tuner, is that television set is used for receiving high-frequency signal and a kind of device that demodulates video information,Existing tuner is generally divided into data signal tuner (abbreviation digit tuner) and analog signal tuner (is called for short simulation highFrequently head).
The effect of digit tuner is receiving digital television high-frequency signal, and carry out that channel selection and high-frequency signal amplify andFrequency-conversion processing, some is also with intermediate-freuqncy signal to amplify and high-frequency digital signal demodulation function, and high-frequency digital signal, after demodulation, is exportedData signal be TS stream (being also MPTS), it is that digital data transmission taking " frame " as unit flows, each frame of digital signalIn contain the signals such as synchronous head, data, ending; According to the modulation system that receives high-frequency digital signal, digit tuner also dividesThe orthogonal keying phase modulation of QPSK(QuadraturePhaseShiftKeying) modulation tuner and QAM(QuadratureAmplitudeModulation quadrature amplitude modulation) modulation tuner. QPSK modulation tuner is mainly used in satellite TV signal and connectsReceive; QAM modulation tuner is mainly used in cable TV signal and receives. The effect of simulation tuner is to receive simulated television high frequencySignal, and carry out channel selection, high-frequency signal amplification and frequency-conversion processing, simulation tuner is not generally with intermediate-freuqncy signal to amplify and heightFrequency demodulated signal function, therefore simulated television also needs to add in addition an intermediate frequency amplifier and high-frequency signal demodulator again. General mouldThe circuit such as reception, amplification, demodulation of intending high-frequency signal all needs strict adjustment just can meet the requirement of complete machine, is therefore difficult to highThe functions such as signal reception, amplification, demodulation frequently are all completed by tuner, and the main task master who therefore simulates tuner is frequency-selectingRoad, another one task is exactly frequency reducing, the high-frequency signal receiving is reduced on a fixed frequency to this fixed frequencySignal is exactly intermediate-freuqncy signal, and its frequency is generally 38MHz.
The ground connection of cable TV be generally with power supply be connected together, and the TV signal of cable television system output connectsGround is generally the metal shell of Set Top Box, thus in the time that their current potential is unequal (such as outside TV signal cable suffers thunderHit or with the external power circuit accident that is short-circuited), electric current will flow to electronegative potential point from high potential point, producing to disturb even hasThe heating of line television set or cable TV spontaneous combustion. For addressing this problem, someone proposes at cable television system signal output partBetween son and the signal input terminal of cable TV, install capacitance additional, ground wire current potential the inhibit signal of isolating both connectWhat connect is unimpeded, at the heart yearn (holding wire) of cable television system signal output terminal and the signal input terminal of cable TVHeart yearn (holding wire) between install the signal capacitance of a 2200pF or 1000pF additional, at cable television system signalThe screen layer (the TV signal earth connection of cable television system output) of lead-out terminal and the signal input part of cable TVBetween the screen layer (ground wire of cable TV) of son, install the ground wire capacitance of a 2200pF or 1000pF additional.
Chinese patent literature CN202364309U, discloses a kind of television antenna isolator, it have housing, circuit board,Can plug the first coaxial slicing ear and can export with cable television system signal with the signal input terminal of cable TVThe second coaxial slicing ear that terminal plugs; This circuit board is arranged in this housing, and two axle splicing ears are arranged on respectivelyOn the sidewall of this housing; On this circuit board, signal capacitance is serially connected between the heart yearn of two coaxial slicing ear; This circuitOn plate, three ground wire capacitances are parallel with one another and be serially connected with between the front side of screen layer of two coaxial slicing ear; This circuitOn plate, another three ground wire capacitances are parallel with one another and be serially connected with between the rear side of screen layer of two coaxial slicing ear.
Above-mentioned the deficiencies in the prior art part is: circuit board adopts artificial welding with being connected of each electric capacity, and mass is rawProduct efficiency is lower and cost is higher, and artificial welding easily causes homogeneity of product poor; Small product size is large, is unfavorable for being directly installed onIn television set.
Summary of the invention
The technical problem to be solved in the present invention be to provide the lower and homogeneity of product of a kind of cost have preferably antenna everyFrom the tuner assembly of device.
For solving the problems of the technologies described above, the invention provides a kind of tuner assembly, it comprises: tuner element circuit,The antenna isolator being connected with the signal input part of this tuner element circuit; Tuner element circuit is located at an external shieldIn.
This antenna isolator comprises: openend is oppositely arranged, to form a pair of radome of a shielding cavity, wherein oneThe outside of individual radome is provided with screen layer joint, and the rear port of another radome is connected with the front opening of described external shield.
In this screen layer joint, be fixed with heart yearn joint, in described a pair of radome, be provided with multiple ground wire capacitancesWith a signal capacitance; One electrode of this signal capacitance is connected with described heart yearn joint, described in another electrode passesThe rear port of another radome is connected with the signal input part of described tuner element circuit; Described ground wire capacitance is without drawingLine capacitance or patch capacitor; The two poles of the earth of this ground wire capacitance are in its rear and front end, and adopt the mode of tin cream through Reflow SolderingRespectively with described a pair of radome on through hole be weldingly connected.
As further preferred scheme, described signal capacitance is without lead capacitance or patch capacitor; Described signalThe two poles of the earth of capacitance are in its rear and front end, and one of them electrode adopts mode and the described heart yearn of tin cream through Reflow SolderingThe medial extremity of joint is connected.
As further preferred scheme, for ease of fixing tin cream, on described a pair of radome, be arranged with multiple logicalHole; 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 described large and small radome is located at corresponding pit central authorities, is beneficial in the time of assembling, adopts tin cream by each electricityTwo electrodes that hold are connected with the installing hole on large and small radome respectively, then carry out Reflow Soldering.
For improving shield effectiveness, described a pair of radome is respectively large and small radome; The openend of little radome stretches intoIn the opening of described large radome.
Between described large and small radome, be provided with for fixing described each ground wire capacitance and signal capacitance,The installing rack that adopts insulating materials to make, with in the time assembling, packs each electric capacity into installing rack, is beneficial to and improves efficiency of assembling and reliableProperty, double as the insulation between large and small radome.
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 large radome fixed cover is located in the outer rim of described installing rack, and then has fixed large and small radome and installing rack, Jin ErBefore implementing Reflow Soldering, just fix each parts, be beneficial to the reliability of guaranteeing Reflow Soldering, and then be beneficial to 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 on each through hole of described large and small radome, be fixedly installed tin cream;
(2), described large and small radome level is oppositely arranged, and described screen layer joint arranges down, and by each ground wireCapacitance is located at respectively between many groups of relative through holes on described large and small radome, and described signal capacitance is located atOn the medial extremity of described screen layer joint;
(3), send into reflow soldering apparatus, complete welding.
As preferred embodiment, in 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 is put intoIn the installing hole of this installing rack, the edge part of described little radome is pegged graft and is 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) tuner assembly of the present invention adopts allFor without lead capacitance or patch capacitor, line loss is few, can guarantee the high frequency characteristics of signal transmission, is beneficial to enforcement Reflow Soldering, nothing simultaneouslyNeed manually weld, be suitable for mass production, so reached that mass production efficiency is higher, cost is lower and homogeneity of productGood effect; (2) described large and small radome can adopt stamping parts, and whole product is without pcb board, without plug-in unit original paper, manual weldingConnect, easily ensure homogeneity of product; Meanwhile, the cavity that large and small radome forms is less, and shield effectiveness is better; (3) product entirety bodyLong-pending less, overall structure more firmly, not fragile.
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below the specific embodiment 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.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail:
Embodiment 1:
As Fig. 1, the used as television tuner assembly of the present embodiment comprises: external shield 2, be located in this external shield 2Tuner element circuit 10; The signal output part phase of the signal input part of this tuner element circuit 10 and an antenna isolatorConnect; This antenna isolator comprises: the large and small radome that openend is oppositely arranged, the openend of little radome 5 stretches into described large-size screen monitorsCover in the opening of cover 3; The outside of little radome 5 is provided with screen layer joint 9, is fixed with coaxial line and distributes in screen layer joint 9Heart yearn joint 6, the rear port of large radome 3 is connected with the front opening of described external shield 2; In large and small radome, be provided with 4Individual, 5 or 6 ground wire capacitances 8 and a signal capacitance 1; On large and small radome, be arranged with multiple through holes, eachThrough hole is located at corresponding pit central authorities.
Described ground wire capacitance 8 and signal capacitance 1 are without lead capacitance or patch capacitor; This ground wire capacitanceThe two poles of the earth of 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 holeBe weldingly connected.
The two poles of the earth of described signal capacitance 1 are in its rear and front end, and the electrode of its outboard end adopts tin cream through Reflow SolderingMode be connected with the medial extremity of described heart yearn joint, another electrode is through rear port and the described high frequency of described large radome 3The signal input part of head unit circuit is connected.
Described large and small radome ringwise or square.
As one preferred embodiment, between described large and small radome, be provided with for fixing described each ground wire everyThe installing rack 7 of the plastic material of straight electric capacity 8 and signal capacitance 1. The outer rim of contiguous described installing rack 7 is provided with slot, described inThe edge part of little radome 5 is pegged graft and is fixed in this slot, is beneficial to fixing little radome 5. Wherein, signal capacitance 1 outsideFitting recess tight fit on wall and described installing rack 7, with fixed signal capacitance 1; Meanwhile, described large radome 3 fixed coversBe located in the outer rim of described installing rack 7, and then fixed large and small radome and installing rack 7, and then before implementing Reflow Soldering,Just fix each parts, be beneficial to the reliability of guaranteeing Reflow Soldering, and then be beneficial to guarantee homogeneity of product.
Embodiment 2:
The production method of the antenna isolator in the tuner assembly of above-described embodiment 1, it comprises the steps:
A, on two electrodes of each electric capacity or on described large and small radome, be fixedly installed tin cream;
B, described heart yearn joint are fixed in screen layer joint by collets 11, meanwhile, and by the inner side of screen layer jointEnd secure fit is in the installing hole of described large radome or little radome;
C, described large and small radome level is oppositely arranged, and described screen layer joint arranges down, and by each ground wire everyStraight electric capacity is located at respectively between many groups of relative through holes on described large and small radome, and described signal capacitance is located to instituteState on the medial extremity of screen layer joint;
D, send into reflow soldering apparatus, complete welding.
As preferred embodiment, in described step C, before described large and small radome level is oppositely arranged, alsoComprise: between described large and small radome, installing rack is set, then each ground wire capacitance and signal capacitance is put into thisIn the installing hole of installing rack, the edge part of described little radome is pegged graft and is fixed in the slot of this installing rack simultaneously.
The present embodiment obviously, above-described embodiment is only for example of the present invention is clearly described, and is notTo the restriction of embodiments of the present invention. For those of ordinary skill in the field, on the basis of the above description alsoCan make other changes in different forms. Here without also giving exhaustive to all embodiments. And thisBelong to a bit apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (9)
1. a tuner assembly, is characterized in that comprising: tuner element circuit, defeated with the signal of this tuner element circuitEnter to hold connected antenna isolator; Tuner element circuit is located in an external shield;
This antenna isolator comprises: openend is oppositely arranged, to form a pair of radome of a shielding cavity, one of them screenThe outside of covering cover is provided with screen layer joint, and the rear port of another radome is connected with the front opening of described external shield;
In this screen layer joint, be fixed with heart yearn joint, in described a pair of radome, be provided with multiple ground wire capacitances and oneIndividual signal capacitance; One electrode of this signal capacitance is connected with described heart yearn joint, another electrode through described anotherThe rear port of radome is connected with the signal input part of described tuner element circuit;
Described ground wire capacitance is without lead capacitance or patch capacitor;
The rear and front end of the two poles of the earth of this ground wire capacitance in this ground wire capacitance, and adopt the mode of tin cream through Reflow SolderingBe weldingly connected with described a pair of radome respectively;
Described a pair of radome is respectively large and small radome.
2. tuner assembly according to claim 1, is characterized in that: described signal capacitance for without lead capacitance orPatch capacitor;
The rear and front end of the two poles of the earth of described signal capacitance in this signal capacitance, and one of them electrode adopts tinCream is connected with the medial extremity of described heart yearn joint through the mode of Reflow Soldering.
3. tuner assembly according to claim 2, is characterized in that: on described a pair of radome, be arranged with multipleThrough hole; 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 tuner assembly one of claim 1-3 Suo Shu, it is characterized in that: described large and small radome ringwiseOr rectangle; The openend of little radome stretches in the opening of described large radome.
5. tuner assembly according to claim 4, is characterized in that: the through hole on described large and small radome is located at phaseThe pit central authorities of answering.
6. tuner assembly according to claim 4, is characterized in that: between described large and small radome, be provided with for solidInstalling rack fixed described each ground wire capacitance and signal capacitance, that adopt insulating materials to make.
7. tuner assembly according to claim 6, is characterized in that: 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 large radome fixed cover is located at the outer rim of described installing rackOn.
8. a production method for the antenna isolator in tuner assembly according to claim 5, is characterized in that bagDraw together following steps:
(1), on two electrodes of each electric capacity or on each through hole of described large and small radome, be fixedly installed tin cream;
(2), described large and small radome level is oppositely arranged, and described screen layer joint arranges down, and by each ground wire every directlyElectric capacity is located at respectively between many groups of relative through holes on described large and small radome, described in described signal capacitance is located atOn the medial extremity of screen layer joint;
(3), send into reflow soldering apparatus, complete welding.
9. production method according to claim 8, is characterized in that: in described step (2), by described large and small shieldingBefore cover level is oppositely arranged, also comprise: between described large and small radome, installing rack is set, then by each ground wire every straight electricityAppearance and signal capacitance are put into the installing hole of this installing rack, the edge part of described little radome are pegged graft and are fixed on this simultaneouslyIn the slot of installing rack.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480831.4A CN103237188B (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
| CN201610302247.8A CN105791721B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator |
| CN201610300612.1A CN105915825B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator and its production method |
| CN201610302035.XA CN105791720B (en) | 2012-11-22 | 2012-11-22 | Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210480831.4A CN103237188B (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610302247.8A Division CN105791721B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator |
| CN201610302035.XA Division CN105791720B (en) | 2012-11-22 | 2012-11-22 | Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality |
| CN201610300612.1A Division CN105915825B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator and its production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103237188A CN103237188A (en) | 2013-08-07 |
| CN103237188B true CN103237188B (en) | 2016-05-04 |
Family
ID=48885201
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210480831.4A Active CN103237188B (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
| CN201610300612.1A Active CN105915825B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator and its production method |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610300612.1A Active CN105915825B (en) | 2012-11-22 | 2012-11-22 | Tuner component with antenna isolator and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN103237188B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008147212A (en) * | 2006-12-06 | 2008-06-26 | Matsushita Electric Ind Co Ltd | Process for manufacturing high-frequency device |
| CN101340543A (en) * | 2008-08-08 | 2009-01-07 | 上海广电电器有限公司 | Anti-flame separation coupler special for television having 3 core electric power plug |
| CN202907070U (en) * | 2012-11-22 | 2013-04-24 | 李明锁 | Tuner assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87217226U (en) * | 1987-12-31 | 1988-09-14 | 西北电讯工程学院 | Distributor for satellite tv receiving power |
| JPWO2007046393A1 (en) * | 2005-10-18 | 2009-04-23 | 日立金属株式会社 | 2-port isolator |
| KR100818477B1 (en) * | 2006-06-14 | 2008-04-02 | 삼성전기주식회사 | Single package television tuning apparatus, and television receiver |
| CN201117990Y (en) * | 2007-11-14 | 2008-09-17 | 顺泰电子科技股份有限公司 | Isolator structure |
| CN201383559Y (en) * | 2009-04-23 | 2010-01-13 | 中山市杰和兴电子有限公司 | Double-isolation interference-free subscriber line |
| CN201440447U (en) * | 2009-06-12 | 2010-04-21 | 顺泰电子科技股份有限公司 | Isolator structure |
| CN202282527U (en) * | 2011-11-15 | 2012-06-20 | 浙江华宇电子有限公司 | Direct current blocking radio frequency connector |
| CN202364309U (en) * | 2011-12-08 | 2012-08-01 | 厦门森晖电子有限公司 | Television antenna isolator |
-
2012
- 2012-11-22 CN CN201210480831.4A patent/CN103237188B/en active Active
- 2012-11-22 CN CN201610300612.1A patent/CN105915825B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008147212A (en) * | 2006-12-06 | 2008-06-26 | Matsushita Electric Ind Co Ltd | Process for manufacturing high-frequency device |
| CN101340543A (en) * | 2008-08-08 | 2009-01-07 | 上海广电电器有限公司 | Anti-flame separation coupler special for television having 3 core electric power plug |
| CN202907070U (en) * | 2012-11-22 | 2013-04-24 | 李明锁 | Tuner assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105915825B (en) | 2018-10-02 |
| CN105915825A (en) | 2016-08-31 |
| CN103237188A (en) | 2013-08-07 |
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Effective date of registration: 20160329 Address after: 213000, Jiangsu City, Jintan province refers to the former town industrial parks Applicant after: Jiangsu Huaxing Electronic Co., Ltd. Address before: 213022 software park, 9 East Taihu Road, Xinbei District, Jiangsu, Changzhou A408 Applicant before: Li Mingsuo Applicant before: Xu Zhiming |
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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, Jintan province refers to the former town industrial parks 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. |
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