CN202907070U - Tuner assembly - Google Patents
Tuner assembly Download PDFInfo
- Publication number
- CN202907070U CN202907070U CN 201220625786 CN201220625786U CN202907070U CN 202907070 U CN202907070 U CN 202907070U CN 201220625786 CN201220625786 CN 201220625786 CN 201220625786 U CN201220625786 U CN 201220625786U CN 202907070 U CN202907070 U CN 202907070U
- Authority
- CN
- China
- Prior art keywords
- radome
- tuner
- capacitance
- signal
- pair
- Prior art date
- 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 - Fee Related
Links
Images
Landscapes
- Details Of Aerials (AREA)
Abstract
The utility model relates to a tuner assembly. The assembly comprises a tuner unit circuit and an antenna isolator which is connected with a signal input terminal of the tuner unit circuit. The tuner unit circuit is arranged in an outer shielding cover. The antenna isolator comprises a pair of shielding covers, wherein opening ends are arranged oppositely so as to form a shielding cavity. An outer side of one of the shielding covers is provided with a shielding layer joint and a rear port of the other shielding cover is connected with a front end opening of the outer shielding cover. A capacitor adopted by the antenna isolator in the tuner assembly is a leadless capacitor or a chip capacitor. Line losses are small and a high frequency characteristic of a transmission signal can be ensured. Simultaneously, it is conducive to implement reflow soldering. Manual welding is not needed and mass production is suitable. Mass production efficiency is high. Cost is low and product consistency is good. The shielding covers can adopt a stamping part. A PCB board is not needed in the whole product. An original plug-in part and the manual welding are not needed. The product consistency is easy to guarantee.
Description
Technical field
The utility model relates to the parts of television set, a kind of tuner assembly with antenna isolator specifically, and the antenna isolator is used 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, and existing tuner generally is divided into digital signal tuner (abbreviation digit tuner) and analog signal tuner (being called for short the simulation tuner).
The effect of digit 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 the digital data transmission stream take " frame " as unit, contains the signals such as synchronous head, data, ending in each frame of digital signal; According to the modulation system that receives high-frequency digital signal, digit 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.The circuit such as the reception of general analog high frequency, amplification, demodulation all need strict adjustment just can meet the requirement of complete machine, therefore be difficult to high-frequency signal receive, the 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, the second coaxial slicing ear that it has housing, circuit board, can plug with the signal input terminal of cable TV the first coaxial slicing ear 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 large, is unfavorable for being directly installed in the television set.
The utility model content
The technical problems to be solved in the utility model provides the tuner assembly that the lower and homogeneity of product of a kind of cost has the antenna isolator preferably.
For solving the problems of the technologies described above, the utility model provides a kind of tuner assembly, and it 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 consist of 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 without 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 without 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, then carries out Reflow Soldering.
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 large 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, double as the insulation between the large and small radome.
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 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.
The technique effect that the utlity model has: the electric capacity that the antenna isolator in (1) tuner assembly of the present utility model adopts all is without lead capacitance or patch capacitor, line loss is few, can guarantee the high frequency characteristics of signal transmission, be beneficial to simultaneously the enforcement Reflow Soldering, 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 whole 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) the product overall volume is less, overall structure more firmly, not fragile.
Description of drawings
For content of the present utility model is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein
The sectional structure chart of Fig. 1 tuner assembly of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is elaborated:
Embodiment 1:
Such as Fig. 1, the used as television tuner assembly of present embodiment 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 large 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 large 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, it is central that each through hole is located at corresponding pit.
Described ground wire capacitance 8 and signal capacitance 1 are without 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 large 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.Wherein, the fitting recess tight fit on the outer wall of signal capacitance 1 and the described installing rack 7 is with fixed signal capacitance 1; Simultaneously, described large 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; just fix each parts, be beneficial to the reliability of guaranteeing Reflow Soldering, and then be beneficial to the 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 at described large and small radome, be fixedly installed 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 large radome or little radome;
C, 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;
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 the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.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 utility model extended out and still are among the protection range of the present utility model.
Claims (7)
1. a tuner assembly is characterized in that comprising: 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 consist of 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 without 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. tuner assembly according to claim 1 is characterized in that: described signal capacitance is for without 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. tuner assembly 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. described tuner assembly one of according to claim 1-3 is characterized in that: the through hole on the described large and small radome is located at corresponding pit central authorities.
5. tuner assembly 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 large radome.
6. tuner assembly 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. tuner assembly 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 large radome fixed cover is located on the outer rim of described installing rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220625786 CN202907070U (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220625786 CN202907070U (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202907070U true CN202907070U (en) | 2013-04-24 |
Family
ID=48127684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220625786 Expired - Fee Related CN202907070U (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202907070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237188A (en) * | 2012-11-22 | 2013-08-07 | 李明锁 | Tuner component |
-
2012
- 2012-11-22 CN CN 201220625786 patent/CN202907070U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237188A (en) * | 2012-11-22 | 2013-08-07 | 李明锁 | Tuner component |
| CN103237188B (en) * | 2012-11-22 | 2016-05-04 | 江苏华兴电子有限公司 | Tuner assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102904002B (en) | Mobile terminal | |
| CN102983834A (en) | Filter amplifier | |
| CN202907070U (en) | Tuner assembly | |
| CN202907069U (en) | Television set with antenna isolator | |
| CN103237183B (en) | There is the television set of antenna isolator | |
| CN202918414U (en) | Antenna isolator | |
| CN103237188B (en) | Tuner assembly | |
| CN105791720B (en) | Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality | |
| CN105791721B (en) | Tuner component with antenna isolator | |
| CN103248857B (en) | antenna isolator | |
| CN204013863U (en) | Antenna isolator | |
| CN203289589U (en) | A digital all-in-one machine | |
| CN201774119U (en) | Blind-mating connecting device in radio remote unit RRU | |
| CN201518512U (en) | TV radio frequency output circuit and television provided therewith | |
| US20130107128A1 (en) | Television tuner module and broadcast receiving apparatus having the same | |
| CN106128411A (en) | A kind of display high frequency assembly | |
| CN202127420U (en) | Double demodulation circuit and set-top box with same | |
| CN203313304U (en) | High-voltage isolation protective device for coaxial cable | |
| CN203167125U (en) | Connector possessing signal isolation function and television antenna isolator | |
| CN204407489U (en) | Caravan and domestic TV digital TV in high resolution signal receiving antenna | |
| CN109495703A (en) | A kind of the simulated television playback method and system of plug-in coaxial audio-frequency module | |
| CN217011049U (en) | Set-top box with CPE and 5G NR broadcasting function | |
| CN211959414U (en) | High-definition set top box | |
| CN203136032U (en) | Tuner circuit | |
| CN202423562U (en) | Earphone antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Huaxing Electronic Co., Ltd. Assignor: Li Mingsuo|Xu Zhiming Contract record no.: 2014320000273 Denomination of utility model: Tuner assembly Granted publication date: 20130424 License type: Exclusive License Record date: 20140331 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20181122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |