CN202394614U - Television signal transmission terminal load - Google Patents
Television signal transmission terminal load Download PDFInfo
- Publication number
- CN202394614U CN202394614U CN201120481836XU CN201120481836U CN202394614U CN 202394614 U CN202394614 U CN 202394614U CN 201120481836X U CN201120481836X U CN 201120481836XU CN 201120481836 U CN201120481836 U CN 201120481836U CN 202394614 U CN202394614 U CN 202394614U
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- Prior art keywords
- signal transmission
- resistance
- load
- transmission terminal
- cover
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Abstract
The utility model relates to a television signal transmission device, particularly a television signal transmission terminal load. The existing television signal transmission terminal load is composed of thin and short resistance wires, and can still generate the problem of up to -10+/-2dB inversion standing waves in practical use. The technical scheme provided by the utility model is as follows: the television signal transmission terminal load comprises an inner conductor composed of contact pins, an insulation seal sleeve sheathed on the periphery of the inner conductor, a loading resistor of which one end is welded to the tail end of the contact pins of the inner conductor, and a connecting sleeve sheathed on the periphery of the insulation seal sleeve. The utility model is characterized in that the loading resistor is formed by spirally winding a 75-ohm resistance wire around an insulation column, and the insulation seal sleeve is made from polycarbonate. The outer diameter d of the 75-ohm resistance wire of the loading resistor is 0.3mm<=d<=1.2mm, and the length of the resistance wire is increased to the corresponding length which is directly proportional to the selected outer diameter d. The trial proves that the inversion standing wave strength is greatly reduced to -26+/-2dB from -10+/-2dB, and the television signal transmission quality is obviously improved.
Description
Technical field
The utility model relates to a kind of TV signal transmission and uses device, the load of particularly a kind of TV signal transmission terminal.
Background technology
According to the rule of high-frequency signal transmission, the transmission line two ends of open circuit are not because there is the load meeting to demonstrate high impedance.The transmission of TV signal is suitable for such rule equally; When the client terminal of TV signal transmission does not insert the user; TV signal forms standing wave being sent to the vacant line end back end that can rebound, and return standing wave can overlap with normal signal, has disturbed normal TV signal to transmit.Therefore, the vacant terminal of TV signal transmission line must the adjunction terminate load.
The TV signal transmission terminal load of existing similar purposes, all adopt 75 ohm of resistance values, the line external diameter is equal to or less than 0.3 millimeter resistance wire helical form and is surrounded on the load resistance that insulated column constitutes, because used resistance wire external diameter is thin; Be that its sectional area is little, according to resistance formula R=ρ L/S, under the prerequisite that guarantees 75 ohm of resistance values; The material that resistance wire adopts is constant; Be electricalresistivity when constant, its length L also must keep constant with sectional area S's than L/S=R/ ρ, and used resistance wire external diameter is thin; Be that its sectional area S is little, the also necessary corresponding shortening of length L; Used resistance wire external diameter is thick, and promptly its sectional area S is big, the also necessary corresponding lengthening of length L, sectional area S and length L relation in direct ratio.
The load resistance of the TV signal transmission terminal load of existing similar purposes, its resistive conductor external diameter is equal to or less than 0.3 millimeter, and length is also corresponding shorter, only can helical form be surrounded on insulated column 3 circles.The load resistance that this not only thin but also short resistance wire constitutes still can produce the return standing wave up to-10 ± 2dB in actual use, and the normal transmission of TV signal is caused bigger influence with using.Secondly; The lightest density is the polypropylene formation of 0.90g/cm3～0.91g/cm3 in the insulated enclosure cover employing plastics of the TV signal transmission terminal load of existing similar purposes; Low-density polypropylene insulation sealing shroud has reduced the insulation degree, is difficult to further reduce the intensity of return standing wave.
This shows, study and design a kind of resistance wire external diameter and length, improve the density of material that insulated enclosure overlaps, thereby the TV signal transmission terminal load that reduces return intensity of standing wave greatly is necessary through the increasing load resistance.
The utility model content
The purpose of the utility model is the deficiency that overcomes prior art; Research also designs a kind of density of material that overlaps through resistance wire external diameter and length, the raising insulated enclosure of increasing load resistance, thereby reduces the TV signal transmission terminal load of return intensity of standing wave greatly.
The purpose of the utility model is achieved in that the load of a kind of TV signal transmission terminal; Comprise the inner wire that contact pin constitutes; Be socketed on the insulated enclosure cover of inner wire contact pin afterbody periphery, an end wire bonds is socketed on the cover in succession of insulated enclosure cover periphery in the load resistance of inner wire contact pin tail end; It is characterized in that described load resistance is that the resistance wire helical form of 75 ohm of resistance values is surrounded on the resistance that insulated column constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
Merlon density is 1.18g/cm3～1.20g/cm3, is that the polypropylene of 0.90g/cm3～0.91g/cm3 is compared with density, and density has increased by 31.1～31.8%, and its electrical insulating property performance obviously improves.
The purpose of the utility model can also be with taking following further technical measures to realize:
The resistance wire outside diameter d of the load resistance that said resistance value is 75 ohm is 0.3 millimeter≤d≤1.2 millimeter, and the length L of resistance wire is lengthened to and selectes the directly proportional respective length of outside diameter d.According to resistance formula R=ρ L/S, L=SR/ ρ, in the formula, R must equal 75 ohm, and after the manufacturing materials of resistance wire was confirmed, its electricalresistivity confirmed that also R/ ρ is a constant.For example, d is chosen to be 1.0 millimeters, and also corresponding being lengthened to of L can helical form be surrounded on insulated column 4 circles.
Described load resistance one end lead becomes the contact pin of inner wire, and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps in succession.The technique effect that this load resistance one end lead becomes the contact pin design of inner wire is: the welding sequence of having cancelled existing TV signal transmission terminal load factor resistance and inner wire; Both saved processing cost, reduced the signal transmission attenuation of TV signal transmission course again by way of weld; Bend apical grafting behind crooked 180 degree of other end lead in the technique effect of the intracavity bottom design of cover in succession is: constitute TV signal transmission loop, reach the effect in load resistance incoming television signal transmission loop.
The described leading section inner chamber that overlaps in succession is designed with to connect and uses screw thread; The described periphery of overlapping in succession is designed with the fastening hexagon annular projection of using; Describedly overlap the cup cover shape that rearward end is designed to hold load resistance in succession.Overlap in succession inner chamber be designed with connect with screw thread in case with transmission cable radio frequency (RF) coaxial connector periphery screw thread each other realization be threaded; It is to use when being threaded fastened tools such as spanner to provide convenience that periphery is designed with fastening use hexagon annular projection; Overlap the cup cover shape that rearward end is designed to hold load resistance in succession, both saved and made in succession that the consumptive material of cover reduces cost, beautified the outward appearance of cover in succession again.
The TV signal transmission terminal load that the utility model enforcement obtains has shown following beneficial effect through trying out:
Compare with the TV signal transmission terminal load of existing similar purposes; The resistance wire external diameter overstriking of the load resistance of the utility model and length lengthening; The manufacturing materials of insulated enclosure cover adopts the Merlon that density has increased by 31.1～31.8%, the electrical insulating property performance obviously improves; Through Preliminary detection, TV signal is reduced to-26 ± 2dB by-10 ± 2dB through the return intensity of standing wave of transmission terminal load significantly, and the TV signal transmission quality obviously improves.
Description of drawings
Fig. 1 is the sketch map that meets the utility model thematic structure; Fig. 2 is the load resistance structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing the implementation detail of the utility model has been explained as follows:
Like Fig. 1, shown in 2; The load of a kind of TV signal transmission terminal comprises the inner wire 1 that contact pin constitutes, and is socketed on the insulated enclosure cover 2 of inner wire contact pin afterbody periphery; One end wire bonds is in the load resistance 3 of inner wire contact pin tail end; Be socketed on the cover in succession 4 of insulated enclosure cover periphery, it is characterized in that described load resistance is that resistance wire 31 helical forms of 75 ohm of resistance values are surrounded on the resistance that insulated column 32 constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
As shown in Figure 2, resistance wire 31 outside diameter d of the load resistance 3 that said resistance value is 75 ohm are 0.3 millimeter≤d≤1.2 millimeter, and the length of resistance wire 31 is lengthened to and selectes the directly proportional respective length of outside diameter d.
Like Fig. 1, shown in 2, described load resistance 3 one end leads become the contact pin of inner wire 1, and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps 4 in succession.
As shown in Figure 1, the described 4 leading section inner chambers that overlap in succession are designed with connection with screw thread 41.
As shown in Figure 1, described 4 peripheries of overlapping in succession are designed with fastening with hexagon annular projection 42.
As shown in Figure 1, describedly overlap the cup cover shape that 4 rearward end are designed to hold load resistance 3 in succession.
In the practical implementation, all adopt corresponding common process to make.
Claims (6)
1. TV signal transmission terminal load; Comprise the inner wire (1) that contact pin constitutes; Be socketed on the insulated enclosure cover (2) of inner wire contact pin afterbody periphery, an end wire bonds is socketed on the cover in succession (4) of insulated enclosure cover periphery in the load resistance (3) of inner wire contact pin tail end; It is characterized in that described load resistance is that resistance wire (31) helical form of 75 ohm of resistance values is surrounded on the resistance that insulated column (32) constitutes, the manufacturing materials of described insulated enclosure cover is a Merlon.
2. TV signal transmission terminal according to claim 1 load; Resistance wire (31) outside diameter d that it is characterized in that the load resistance (3) of 75 ohm of said resistance values is 0.3 millimeter≤d≤1.2 millimeter, and the length L of resistance wire (31) is lengthened to and selectes the directly proportional respective length of outside diameter d.
3. TV signal transmission terminal according to claim 2 load is characterized in that described load resistance (3) one end leads become the contact pin of inner wire (1), and the bend apical grafting behind crooked 180 degree of other end lead is in the intracavity bottom that overlaps (4) in succession.
4. TV signal transmission terminal according to claim 1 load is characterized in that described (4) leading section inner chamber of cover in succession is designed with connection with screw thread (41).
5. a kind of radio frequency (RF) coaxial connector according to claim 1 is characterized in that described (4) periphery of cover in succession is designed with fastening with hexagon annular projection (42).
6. a kind of radio frequency (RF) coaxial connector according to claim 1 is characterized in that described (4) rearward end of cover in succession is designed to hold the cup cover shape of load resistance (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120481836XU CN202394614U (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120481836XU CN202394614U (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202394614U true CN202394614U (en) | 2012-08-22 |
Family
ID=46669521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120481836XU Expired - Fee Related CN202394614U (en) | 2011-11-29 | 2011-11-29 | Television signal transmission terminal load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202394614U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496430A (en) * | 2011-11-29 | 2012-06-13 | 镇江市丹徒区佳兴电子有限公司 | Television signal transmission terminal load |
-
2011
- 2011-11-29 CN CN201120481836XU patent/CN202394614U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496430A (en) * | 2011-11-29 | 2012-06-13 | 镇江市丹徒区佳兴电子有限公司 | Television signal transmission terminal load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20161129 |