CN105791720B - Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality - Google Patents
Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality Download PDFInfo
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- CN105791720B CN105791720B CN201610302035.XA CN201610302035A CN105791720B CN 105791720 B CN105791720 B CN 105791720B CN 201610302035 A CN201610302035 A CN 201610302035A CN 105791720 B CN105791720 B CN 105791720B
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- shielding case
- capacitance
- tuner
- signal
- element circuit
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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
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- Multimedia (AREA)
- Signal Processing (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
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Abstract
The present invention relates to a kind of tuner components for ensuring the antenna isolator of high-frequency signal transmission quality comprising：Tuner element circuit, the antenna isolator being connected with the signal input part of the tuner element circuit；Tuner element circuit is set in an external shield.The antenna isolator includes：Open end is oppositely arranged, to constitute a pair of of shielding case of a shielding cavity, and the outside of one of shielding case is equipped with shielded layer connector, and the rear port of another shielding case is connected with the front opening of the external shield.The capacitance that antenna isolator in tuner component uses is all for no lead capacitance or patch capacitor, line loss is few, it can ensure that the high frequency characteristics of transmission signal, simultaneously conducive to implementation Reflow Soldering, without human weld, it is suitable for mass production, and then has reached that mass production efficiency is higher, cost is relatively low and the preferable effect of homogeneity of product；Stamping parts can be used in shielding case, and entire product is not necessarily to pcb board, without plug-in unit original paper, manual welding, easily ensures homogeneity of product.
Description
Technical field
The present invention relates to the component of television set, specifically a kind of tuner component with antenna isolator, antenna isolation
Device is used to ensure the transmission quality of high-frequency signal.
Background technology
Tuner：It is commonly called as tuner, is that television set is used for receiving high-frequency signal and demodulates a kind of device of video information,
Existing tuner is generally divided into digital signal tuner（Abbreviation digit tuner）With analog signal tuner（It referred to as simulates high
Frequency head）.
The effect of digit tuner be receive DTV high-frequency signal, and carry out channel selection and high-frequency signal amplification and
Frequency-conversion processing, also with intermediate-freuqncy signal amplification and high-frequency digital signal demodulation function, high-frequency digital signal is demodulated for some, output
Digital signal be TS stream（Also it is transport stream）, it is with the digital data transmission stream that " frame " is unit, each frame of digital signal
In contain the signals such as synchronous head, data, ending；According to the modulation system for receiving high-frequency digital signal, digit tuner also divides
QPSK（The orthogonal keying phase modulation of Quadrature Phase Shift Keying）Modulate tuner and QAM（Quadrature
Amplitude Modulation quadrature amplitude modulations）Modulate tuner.QPSK modulation tuners are mainly used for satellite TV signal and connect
It receives；QAM modulation tuner is mainly used for cable TV signal reception.The effect of simulation tuner is to receive simulated television high frequency
Signal, and channel selection, high-frequency signal amplification and frequency-conversion processing are carried out, simulation tuner is generally without intermediate-freuqncy signal amplification and height
Frequency demodulated signal function, therefore simulated television also needs in addition to add an intermediate frequency amplifier and high-frequency signal demodulator again.General mould
The circuits such as reception, amplification, the demodulation of quasi- high-frequency signal are required for strictly adjusting the requirement that can just meet complete machine, therefore are difficult high
The functions such as the reception of frequency signal, amplification, demodulation are all completed by tuner, therefore the main task master for simulating tuner is frequency-selecting
Road, another task are exactly frequency reducing, the high-frequency signal received are reduced on a fixed frequency, this fixed frequency
Signal is exactly intermediate-freuqncy signal, and frequency is generally 38MHz.
The ground connection of cable TV is usually and power ground is connected together, and the TV signal of cable television system output connects
Ground is usually the metal shell of set-top box, so when their current potential is unequal（For example external TV signal cable is by thunder
It hits or short circuit accident occurs with external power circuit）, electric current will flow to low potential point from high potential point, and generating interference even has
Line television set generates heat or cable TV spontaneous combustion.To solve this problem, it is thus proposed that in cable television system signal output end
Capacitance is installed additional between son and the signal input terminal of cable TV, the ground of the two is isolated and signal is kept to connect
What is connect is unimpeded, in the signal input terminal of core wire (signal wire) and cable TV of cable television system signal output terminal
Core wire (signal wire) between install additional a 2200pF or 1000pF signal capacitance, in cable television system signal
Signal input part of the shielded layer (the TV signal ground wire of cable television system output) of leading-out terminal with cable TV
Install the ground wire capacitance of a 2200pF or 1000pF between the shielded layer (ground wire of cable TV) of son additional.
Chinese patent literature CN 202364309U, disclose a kind of television antenna isolator, it have shell, circuit board,
The first coaxial slicing ear can be plugged with the signal input terminal of cable TV and can be exported with cable television system signal
The second coaxial slicing ear that terminal plugs；The circuit board is mounted in the shell, and two axis connection terminals are separately mounted to
On the side wall of the shell；Signal capacitance is serially connected between the core wire of two coaxial slicing ears on the circuit board；The circuit
Three ground wire capacitances are parallel with one another on plate and are serially connected between the front side of the shielded layer of two coaxial slicing ears；The circuit
The other three ground wire capacitance is parallel with one another on plate and is serially connected between the rear side of the shielded layer of two coaxial slicing ears.
It is in place of above-mentioned the deficiencies in the prior art：The connection of circuit board and each capacitance uses human weld, batch metaplasia
Produce that less efficient and cost is higher, and it is poor that human weld easily leads to homogeneity of product；Small product size is big, is unfavorable for being directly installed on
In television set.
Invention content
The technical problem to be solved in the present invention is to provide a kind of cost relatively low and homogeneity of product preferably have antenna every
Tuner component from device.
In order to solve the above technical problems, the present invention provides a kind of tuner components comprising：Tuner element circuit,
The antenna isolator being connected with the signal input part of the tuner element circuit；Tuner element circuit is set to an external shield
It is interior.
The antenna isolator includes：Open end is oppositely arranged, to constitute a pair of of shielding case of a shielding cavity, and therein one
The outside of a shielding case is equipped with shielded layer connector, and the rear port of another shielding case is connected with the front opening of the external shield.
It is fixed with core wire connector in the shielded layer connector, multiple ground wire capacitances are equipped in a pair of of shielding case
With a signal capacitance；One electrode of the signal capacitance is connected with the core wire connector, and another electrode passes through described
The rear port of another shielding case is connected with the signal input part of the tuner element circuit；The ground wire capacitance is that nothing is drawn
Line capacitance or patch capacitor；The two poles of the earth of the ground wire capacitance are in its rear and front end, and in such a way that tin cream is through Reflow Soldering
It is weldingly connected respectively with the through-hole on a pair of of shielding case.
As further preferred scheme, the signal capacitance is no lead capacitance or patch capacitor；The signal
The two poles of the earth of capacitance are in its rear and front end, and one of electrode in such a way that tin cream is through Reflow Soldering with the core wire
The inner end of connector is connected.
As further preferred scheme, for ease of fixed tin cream, it is arranged on a pair of of shielding case multiple logical
Hole；The two poles of the earth of each ground wire capacitance are weldingly connected with the through-hole on a pair of of shielding case respectively.
Through-hole on the large and small shielding case is set to corresponding pit center, is conducive in assembly, using tin cream by each electricity
Two electrodes held are connected with the mounting hole on large and small shielding case respectively, then carry out Reflow Soldering.
To improve shield effectiveness, a pair of of shielding case is respectively large and small shielding case；The open end of small shielding case is stretched into
In the opening of the big shielding case.
Be equipped between the large and small shielding case it is for each ground wire capacitance and signal capacitance,
Using mounting bracket made of insulating materials, when assembling, each capacitance is packed into mounting bracket, conducive to raising efficiency of assembling and reliably
Property, as the insulation between large and small shielding case.
The outer rim of the neighbouring mounting bracket is equipped with slot, the edge part plugged and fixed of the small shielding case in the slot,
The big shielding case fixation is set in the outer rim of the mounting bracket, and then secures large and small shielding case and mounting bracket, Jin Er
Before implementing Reflow Soldering, each component is just secured, conducive to the reliability of Reflow Soldering is ensured, and then conducive to guarantee homogeneity of product.
The large and small shielding case is in a ring or rectangle.
The production method of above-mentioned antenna isolator, it is characterised in that include the following steps：
（1）, on two electrodes of each capacitance or on each through-hole of the large and small shielding case tin cream is fixedly installed；
（2）, the large and small shielding case level is oppositely arranged, and the shielded layer connector is arranged downward, and by each ground wire
Capacitance is respectively arranged between multigroup opposite through-hole on the large and small shielding case, and the signal capacitance is set to
On the inner end of the shielded layer connector；
（3）, be sent into reflow soldering apparatus, complete welding.
As preferred embodiment, the step（2）In, before the large and small shielding case level is oppositely arranged,
Further include：Mounting bracket is set between the large and small shielding case, is then put into each ground wire capacitance and signal capacitance
In the mounting hole of the mounting bracket, while by the edge part plugged and fixed of the small shielding case in the slot of the mounting bracket.
The technique effect that the present invention has：（1）The capacitance that antenna isolator in the tuner component of the present invention uses is all
For no lead capacitance or patch capacitor, line loss is few, it can be ensured that transmits the high frequency characteristics of signal, while conducive to implementing Reflow Soldering, nothing
Need human weld, be suitable for mass production, so reached that mass production efficiency is higher, cost is relatively low and homogeneity of product compared with
Good effect；（2）Stamping parts can be used in the large and small shielding case, and entire product is not necessarily to pcb board, without plug-in unit original paper, manual welding
It connects, easily ensures homogeneity of product；Meanwhile the cavity that large and small shielding case is formed is smaller, shield effectiveness is preferable；（3）Product entirety body
Product is smaller, and overall structure is stronger, is hardly damaged.
Description of the drawings
In order to make the content of the present invention more clearly understood, below according to specific embodiment and in conjunction with attached drawing,
The present invention is described in further detail, wherein
The sectional structure chart of the tuner component of Fig. 1 present invention.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and embodiments：
Embodiment 1：
As the television set of Fig. 1, the present embodiment include with tuner component：External shield 2, in the external shield 2
Tuner element circuit 10；The signal output end phase of the signal input part of the tuner element circuit 10 and an antenna isolator
Even；The antenna isolator includes：The large-size screen monitors are stretched into the open end of the large and small shielding case that open end is oppositely arranged, small shielding case 5
In the opening for covering cover 3；The outside of small shielding case 5 is equipped with shielded layer connector 9, and coaxial line distribution is fixed in shielded layer connector 9
Core wire connector 6, the rear port of big shielding case 3 is connected with the front opening of the external shield 2；4 are equipped in large and small shielding case
A, 5 or 6 ground wire capacitances 8 and a signal capacitance 1；Multiple through-holes are arranged on large and small shielding case, respectively
Through-hole is set to corresponding pit center.
The ground wire capacitance 8 and signal capacitance 1 are no lead capacitance or patch capacitor；The ground wire capacitance
8 the two poles of the earth are in its rear and front end, and in such a way that tin cream 4 is through Reflow Soldering respectively with the through-hole on the large and small shielding case
It is weldingly connected.
The two poles of the earth of the signal capacitance 1 are in its rear and front end, and the electrode of outboard end uses tin cream through Reflow Soldering
Mode be connected with the inner end of the core wire connector, another electrode passes through rear port and the high frequency of the big shielding case 3
The signal input part of head unit circuit is connected.
The large and small shielding case is in a ring or rectangular.
As a preferred embodiment, be equipped between the large and small shielding case for each ground wire every
The mounting bracket 7 of the plastic material of straight capacitance 8 and signal capacitance 1.The outer rim of the neighbouring mounting bracket 7 is equipped with slot, described
The edge part plugged and fixed of small shielding case 5 is conducive to fixed small shielding case 5 in the slot.Wherein, signal capacitance 1 is outer
Wall and the fitting groove tight fit on the mounting bracket 7, with fixed signal capacitance 1；Meanwhile 3 fixing sleeve of big shielding case
It is located in the outer rim of the mounting bracket 7, and then secures large and small shielding case and mounting bracket 7, and then before implementing Reflow Soldering,
Each component is just secured, conducive to the reliability of Reflow Soldering is ensured, and then conducive to guarantee homogeneity of product.
Embodiment 2：
The production method of antenna isolator in the tuner component of above-described embodiment 1 comprising following steps：
A, tin cream is fixedly installed on two electrodes of each capacitance or on the large and small shielding case；
B, the core wire connector is fixed on by collets 11 in shielded layer connector, meanwhile, by the inside of shielded layer connector
Hold secure fit in the mounting hole of the big shielding case or small shielding case；
C, the large and small shielding case level is oppositely arranged, and the shielded layer connector is arranged downward, and by each ground wire every
Straight capacitance is respectively arranged between multigroup opposite through-hole on the large and small shielding case, and the signal capacitance is set to institute
On the inner end for stating shielded layer connector；
D, it is sent into reflow soldering apparatus, completes welding.
As preferred embodiment, in the step C, before being oppositely arranged the large and small shielding case level, also
Including：Mounting bracket is set between the large and small shielding case, each ground wire capacitance and signal capacitance are then put into this
In the mounting hole of mounting bracket, while by the edge part plugged and fixed of the small shielding case in the slot of the mounting bracket.
The present embodiment it is obvious, the above embodiment is merely an example for clearly illustrating the present invention, and not be
Restriction to embodiments of the present invention.For those of ordinary skill in the art, on the basis of the above description also
It can make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And this
The obvious changes or variations that a little spirit for belonging to the present invention are extended out are still in the protection scope of this invention.
Claims (3)
1. a kind of tuner component, it is characterised in that including：It is tuner element circuit, defeated with the signal of the tuner element circuit
Enter the connected antenna isolator in end；Tuner element circuit is set in an external shield；
The antenna isolator includes：Open end is oppositely arranged, to constitute a pair of of shielding case of a shielding cavity, one of screen
The outside for covering cover is equipped with shielded layer connector, and the rear port of another shielding case is connected with the front opening of the external shield；
It is fixed with core wire connector in the shielded layer connector, multiple ground wire capacitances and one are equipped in a pair of of shielding case
A signal capacitance；One electrode of the signal capacitance is connected with the core wire connector, and another electrode passes through described another
The rear port of shielding case is connected with the signal input part of the tuner element circuit；
The ground wire capacitance is no lead capacitance or patch capacitor；
The two poles of the earth of the ground wire capacitance are in the rear and front end of the ground wire capacitance, and in such a way that tin cream is through Reflow Soldering
It is weldingly connected respectively with a pair of of shielding case；
A pair of of shielding case is respectively large and small shielding case；It is equipped between the large and small shielding case for the fixed various regions
Line capacitance and signal capacitance, using mounting bracket made of insulating materials.
2. tuner component according to claim 1, it is characterised in that：The signal capacitance for no lead capacitance or
Patch capacitor；
The two poles of the earth of the signal capacitance are in the rear and front end of the signal capacitance, and one of electrode uses tin
Mode of the cream through Reflow Soldering is connected with the inner end of the core wire connector.
3. tuner component according to claim 2, it is characterised in that：It is arranged on a pair of of shielding case multiple
Through-hole；The two poles of the earth of each ground wire capacitance are weldingly connected with the through-hole on a pair of of shielding case respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610302035.XA CN105791720B (en) | 2012-11-22 | 2012-11-22 | Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality |
| CN201210480831.4A CN103237188B (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210480831.4A Division CN103237188B (en) | 2012-11-22 | 2012-11-22 | Tuner assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105791720A CN105791720A (en) | 2016-07-20 |
| CN105791720B true CN105791720B (en) | 2018-09-07 |
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ID=56401117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610302035.XA Active CN105791720B (en) | 2012-11-22 | 2012-11-22 | Tuner component for the antenna isolator for ensuring high-frequency signal transmission quality |
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| Country | Link |
|---|---|
| CN (1) | CN105791720B (en) |
Citations (2)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100818477B1 (en) * | 2006-06-14 | 2008-04-02 | 삼성전기주식회사 | Single package television tuning apparatus, and television receiver |
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2012
- 2012-11-22 CN CN201610302035.XA patent/CN105791720B/en active Active
Patent Citations (2)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105791720A (en) | 2016-07-20 |
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| CP02 | Change in the address of a patent holder |
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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| CP02 | Change in the address of a patent holder |
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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