CN2205985Y - Power plug wire with electromagnetic shield - Google Patents
Power plug wire with electromagnetic shield Download PDFInfo
- Publication number
- CN2205985Y CN2205985Y CN 94200289 CN94200289U CN2205985Y CN 2205985 Y CN2205985 Y CN 2205985Y CN 94200289 CN94200289 CN 94200289 CN 94200289 U CN94200289 U CN 94200289U CN 2205985 Y CN2205985 Y CN 2205985Y
- Authority
- CN
- China
- Prior art keywords
- plug wire
- power plug
- machine
- electromagnetic shield
- screen
- 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
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model relates to a power plug wire with an electromagnetic shield, which belongs to the technical field of radio. The utility model is characterized in that a certain part of the power plug wire is provided with the electromagnetic shield and then is installed in a machine in use; the disturbance voltage is filtrated to the ground in the machine along with a shielded line by using the electromagnetic shield principle. The external leakage of various frequency signals in the machine can be restrained by using the power plug wire, so the disturbance of injecting power can be effectively reduced, the disturbance from the electric network can be reduced synchronously, and the conducted interference characteristic of machines can be effectively improved.
Description
The utility model relates to a kind of power plug wire that has electromagnetic shielding, belongs to technical field of radio.
Along with popularizing of television set, computer and various instrument and equipments, how to keep good power grid environment just more and more to become a problem that can not be ignored.Therefore, must strict requirement be proposed from two aspects for electric equipment.The one, the signal that makes various frequencies in the machine reduces as far as possible and injects the power supply interference not to external leakage.The 2nd, improve anti-conducted interference ability, promptly improve conduction immunity to interference characteristic.At present, the international and domestic measure of taking is inductance, the line capacitance of line filter in the increasing machine, perhaps installs filter in attaching plug additional.The cost of these practices is all than higher, and effect is not ideal enough.
The purpose of this utility model provides a kind of power plug wire that has electromagnetic shielding.It is with the difference of general power plug wire, a certain electro-magnetic screen layer that is partly with on this power line, and this part is in use packed in the machine, utilizes principle of electromagnetic shield-ing, and interference voltage is filtered in the machine on the ground along shielding conductor.Use this power plug wire,, also can alleviate interference simultaneously significantly from line voltage with leaking of various frequency signals in the inhibition machine.
The purpose of this utility model is achieved in that on the power plug wire in the machine of packing into selects suitable position, suitable length, with electromagnetic shielding materials such as wire netting or aluminium foils, constitutes screen in this one.With fire-retardant, insulating material screen and power line closely are fixed together again.To weld the lead of a tape insulation layer on the screen.The other end of this lead is in use met sb. at the airport interiorly.
Use this utility model, can reduce effectively and inject the power supply interference, alleviate line voltage significantly and disturb, improve the conducted interference degree characteristic of machine effectively.
Accompanying drawing is the stereogram of this utility model one specific embodiment.
By accompanying drawing this embodiment is illustrated below: (1) is power line among the figure; (2) for being enclosed within the gauze screen on the power line; (3) for wrapping in gauze screen outside, the fire retardant insulating adhesive plaster that gauze screen and power line closely are fixed together; (4) the thermoplastic sleeve pipe that tightens for the two ends that are enclosed within (3) outside; (5) be that an end and screen weld, the lead of tape insulation layer; (6) be the Single-phase plug that links to each other with (5) other end; (7) be attaching plug; (8) for peelling off the power line of outermost layer insulated hull; (9) be will with the exposed part of the power line of internal power supply inlet welding.
Require gauze screen (2) not damage the outer insulation of power line (1).The contact that fire retardant insulating adhesive plaster (3) will pack tightly gauze screen (2) and weld with lead-in wire (5) must not make the metal part branch expose.Tighten up at thermoplastic sleeve pipe (4) two ends, does not expose adhesive tape (3).During use, Single-phase plug (6) will with machine in contact, must not become flexible.
Before the use, power line exposed part (9) and internal power supply importation are joined, will link to each other in Single-phase plug (6) and the machine, the shielded part of conductor strip is all placed in the machine properly position, this utility model promptly enters state to be used.
On television set, to use this utility model to be example; Actual measurement low side interference voltage rejection ratio national standard improves about 3dB, and high-end interference voltage rejection ratio national standard improves about 15dB, and ratio of performance to price height, and is convenient and easy, can use on various electric equipments.
Claims (1)
1, a kind of power plug wire that has electromagnetic shielding, it is except that the whole features with general power plug wire, also increased electro-magnetic screen layer, it is characterized in that: in the part in power line is packed machine into, select suitable position, suitable length, with electromagnetic shielding materials such as wire netting or aluminium foils, constitute screen in this one, use fire-retardant again, insulating material closely is fixed together screen and power line, to weld the lead of a tape insulation layer on the screen, the other end of this lead is in use met sb. at the airport interiorly, utilizes electromagnetic shielding, makes interference voltage filter ground in the machine with shielding conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94200289 CN2205985Y (en) | 1994-01-10 | 1994-01-10 | Power plug wire with electromagnetic shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94200289 CN2205985Y (en) | 1994-01-10 | 1994-01-10 | Power plug wire with electromagnetic shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205985Y true CN2205985Y (en) | 1995-08-23 |
Family
ID=33820671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94200289 Expired - Fee Related CN2205985Y (en) | 1994-01-10 | 1994-01-10 | Power plug wire with electromagnetic shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205985Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979668A (en) * | 2019-04-22 | 2019-07-05 | 苏州浪潮智能科技有限公司 | A kind of shielded power supply line and its installation method |
-
1994
- 1994-01-10 CN CN 94200289 patent/CN2205985Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979668A (en) * | 2019-04-22 | 2019-07-05 | 苏州浪潮智能科技有限公司 | A kind of shielded power supply line and its installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |