CN101052267A - Electromagnetic shielding device - Google Patents
Electromagnetic shielding device Download PDFInfo
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- CN101052267A CN101052267A CN 200610066396 CN200610066396A CN101052267A CN 101052267 A CN101052267 A CN 101052267A CN 200610066396 CN200610066396 CN 200610066396 CN 200610066396 A CN200610066396 A CN 200610066396A CN 101052267 A CN101052267 A CN 101052267A
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- lid
- framework
- electromagnetic screen
- pcb
- frame element
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Abstract
The invention is set up on a PCB. The electromagnetic shielding device comprises a frame and a cap. Said frame sits on the PCB and is made of metal material. Said cap is made of electroconductive rubber. The combination of the frame and the cap forms a sealed room to cover the electronic components on the PCB.
Description
Technical field
The invention relates to a kind of electromagnetic screen, and particularly relevant for a kind of electromagnetic screen that uses conductive rubber.
Background technology
Electromagnetic interference is one of common problem of electronic equipment, and circuit all can generate electromagnetic waves in application usually, and this electromagnetic wave can influence the transmission signal and the service behaviour of other electron component.Because mobile phone it require the signal transmission speed very fast, thereby its antagonism electromagnetic interference has quite high requirement.Generally speaking, in action electromagnetic screen can be arranged on its printed circuit board (PCB) (Printed CircuitBoard) in the phone, be used for preventing electromagneticly leaking or avoiding external electromagnetic waves to infiltrate and the interference that causes.
See also shown in Figure 1A, illustrate exploded perspective view into known a kind of electromagnetic screen; Figure 1B illustrates and is the stereogram after the combination of the electromagnetic screen shown in Figure 1A.Please consult simultaneously shown in Figure 1A and Figure 1B, traditional electromagnetic screen 100 is to be made with metal material, and it comprises a metal framework (Frame) 110 and a metal cap body (Cover) 120.Metal framework 110 is to utilize surface mount technology (Surface Mount Technology SMT) is fixed on the printed circuit board (PCB) 130, and has a plurality of protuberances 112 on its outer surface 110a.Metal cap body 120 has a cover plate 122 and is connected in cover plate 122 sidewall 124 on every side, has most the perforation 126 corresponding to above-mentioned protuberance 112 on this sidewall 124.
When desire is assembled in metal cap body 120 on the metal framework 110, be that sidewall 124 with metal cap body 120 is socketed on the outer surface 110a of metal framework 110, and the protuberance on the metal framework 110 112 is sticked on the metal cap body 120 in the corresponding perforation 126, so, metal cap body 120 is combined closely on metal framework 110.
Because metal cap body 120 is to utilize aforesaid way to be tightly fixed on the metal framework 110, so metal cap body 120 is difficult for breaking away from from metal framework 110.When the electronic component (not shown) on the printed circuit board (PCB) 130 needed repairing, metal cap body 120 also was difficult for disassembling from metal framework 110 but comparatively speaking.Maintenance mode at present comparatively commonly used is to utilize hand tool such as tweezers that the sidewall 124 of metal cap body 120 is pried open, and metal cap body 120 could be removed from metal framework 110 then.But when with this mode metal cap body 120 being removed on metal framework 110, cause sidewall 124 distortion of metal cap body 120 easily, therefore, metal cap body 120 will be difficult to reuse.In addition, when dismounting metal cap body 120, also can destroy the integrality of the outer surface 110a of metal framework 110.In addition, metal framework 110 is to utilize the SMT processing procedure that it is fixed on the printed circuit board (PCB) 130, therefore, if destroyed the integrality of metal framework 110 accidentally, more can cause the difficulty of maintenance back assembling.
In addition, recently, make and often need do the relative distance of design that cooperatively interacts between every spare part according to its geometric figure and space to further therebetween because the requirement of convenience when carrying of every electronic product raises day by day.Therefore, cover plate 122 parts of metal cap body 120 often must cooperate near spare part and design the corresponding recess 128 that caves in toward metal framework 110 places.But because the production method of metal cap body 120 is to make via die stamping with sheet metal, therefore, the cover plate 122 of metal cap body 120 is as easy as rolling off a log because of the punching press failure, and causes the not good problem of yield.
Summary of the invention
The purpose of this invention is to provide a kind of electromagnetic screen, this electromagnetic screen is a part of utilizing conductive rubber to come the substituted metal lid, the problem that dismounting is difficult for when being caused maintenance to solve the known lid that utilizes metal material to make.
For reaching above-mentioned or other purposes, the present invention proposes a kind of electromagnetic screen.This electromagnetic screen is to be arranged on the printed circuit board (PCB) with electronic component, and it comprises framework and lid.Framework is arranged on the printed circuit board (PCB), and is made up of metal material.Lid is made up of conductive rubber.Wherein, lid is incorporated into framework, makes lid and framework form a confined space, to surround an electronic component that is disposed on the printed circuit board (PCB).
In one embodiment of this invention, above-mentioned lid more comprises a dielectric film, is disposed at the surface that lid regards to framework.
In one embodiment of this invention, above-mentioned dielectric film is a polyester film (mylar).
In one embodiment of this invention, the shape of above-mentioned lid is the shape corresponding to framework.
In one embodiment of this invention, above-mentioned lid and framework electrically connect.
In one embodiment of this invention, above-mentioned lid has a recess towards framework place depression.
In one embodiment of this invention, above-mentioned framework comprises one first frame element and one second frame element, has a gap between first frame element and second frame element, and lid has a fin corresponding to the gap, and fin is to be equipped in the gap.
In one embodiment of this invention, above-mentioned lid edge is that mode with close-fitting is incorporated into framework.
The present invention makes the lid of electromagnetic screen because of adopting conductive rubber.Because lid is made up of the rubber-like conductive rubber, therefore, can solves the dismounting that lid was caused that is made with metal material in the known techniques and be difficult for and the low problem of reusability.
In addition, because the cost of material of conductive rubber is lower, and its mould development cost is lower, therefore, can reduce the cost of manufacture of whole electromagnetic screen.Moreover lid is that the mode of conductive rubber with ejection formation is made, and therefore, in the time of can avoiding tradition with the recess on the impact style formation lid, because of the punching press failure, and causes the not good problem of yield.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1A is the exploded perspective view of known a kind of electromagnetic screen.
Figure 1B is the stereogram after the electromagnetic screen combination shown in Figure 1A.
Fig. 2 A is the exploded perspective view of a kind of electromagnetic screen of one embodiment of the invention.
Fig. 2 B is the stereogram after the electromagnetic screen combination shown in Fig. 2 A.
Fig. 3 is the bottom view of the lid shown in Fig. 2 A.
Fig. 4 is the exploded perspective view of a kind of electromagnetic screen of another embodiment of the present invention.
Fig. 5 is the bottom view of the lid shown in Fig. 4.
100: known electromagnetic screen 110: metal framework
110a: outer surface 112: protuberance
120: metal cap body 122: cover plate
124: sidewall 126: perforation
128: recess 130: printed circuit board (PCB)
200: electromagnetic screen 210: framework
220: lid 222: cover plate
224: sidewall 224a inner surface
226: recess 228: dielectric film
230: printed circuit board (PCB) 300: electromagnetic screen
310: framework 310a: first frame element
310b: second frame element 314: gap
320: lid 322: cover plate
324: sidewall 326: fin
328: dielectric film 329a, 329b: recess
330: printed circuit board (PCB)
Embodiment
See also shown in Fig. 2 A, illustrate exploded perspective view into a kind of electromagnetic screen of one embodiment of the invention; Fig. 2 B illustrates and is the stereogram after the combination of the electromagnetic screen shown in Fig. 2 A.Please consult Fig. 2 A and 2B simultaneously, electromagnetic screen 200 is arranged on the printed circuit board (PCB) 230, to surround an electronic component (not shown) that is disposed on the printed circuit board (PCB) 230.So, can isolate the external electromagnetic ripple for the interference that electronic component caused on the printed circuit board (PCB) 230 by electromagnetic screen 200, and can prevent electromagnetic leaking simultaneously.
See also shown in Figure 3ly, illustrate bottom view into the lid shown in Fig. 2 A.Please consult Fig. 2 A and Fig. 3 simultaneously, lid 220 is to be made with ejection formation or other modes by conductive rubber material, and it comprises that a cover plate 222 and is connected in cover plate 222 sidewall 224 on every side, and this sidewall 224 is to extend towards the direction of printed circuit board (PCB) 230.In addition, the shape of an inner surface 224a of sidewall 224 needs the external form corresponding to the framework 210 shown in Fig. 2 A, and lid 220 is closely combined with framework 210.
Because lid 220 is made up of conductive rubber, itself promptly has elasticity, therefore, during electronic component in desire is keeped in repair electromagnetic screen 200, can easily lid 220 be pushed aside, to carry out the maintenance of electronic component.And after maintenance finishes, lid 220 is sheathed on the framework 210 gets final product again.So, can avoid known metal framework in when dismounting, cause easily metal framework destruction and can't reusable situation.In addition, finish and with after contiguous spare part combines, also the position that can utilize other spare parts to limit lid 200 comes off to prevent it when 210 assemblings of lid 220 and framework.
In addition, because lid 220 is made up of the rubber-like conductive rubber, for the cover plate 222 of avoiding lid 220 be squeezed the distortion after, lid 220 contacts with electronic component on the printed circuit board (PCB) 230 and causes circuit turn-on, therefore, see also shown in Figure 3ly, optionally dispose a dielectric film 228, with the situation that prevents that lid 220 and electronic component on the printed circuit board (PCB) 230 are short-circuited in the inboard of the cover plate 222 of lid 220.In one embodiment of this invention, the material of dielectric film 228 can be polyester film.
See also shown in Fig. 2 A, because electronic product now makes every effort to compact, what the space between every spare part was also relative dwindles, and lid 220 often need cooperatively interact design with near spare part to dwindle its space.Therefore, can have a recess 226 towards framework 210 places depressions on the cover plate 222 of lid 220, the external form of this recess 226 is to cooperate the spare part of its top and design.The shape of this recess 226 is not limited only to the rectangle shown in Fig. 2 A.For instance, the external form of recess 226 can be cylindrical or any other geometry.
See also shown in Figure 4ly, be the exploded perspective view of a kind of electromagnetic screen 300 of another embodiment of the present invention.Fig. 5 illustrates the bottom view into the lid shown in Fig. 4.Please consult Fig. 4 and Fig. 5 simultaneously, the structure of this electromagnetic screen 300 is identical with the electromagnetic screen 200 shown in Fig. 2 A haply, and the two difference is: framework 310 comprises the first frame element 310a and the second frame element 310b, and has a gap 314 between the first frame element 310a and the second frame element 310b.And lid 320 comprises that equally a cover plate 322 and is connected in cover plate 322 sidewall 324 on every side, in addition, lid 320 also comprises a fin 326, and this fin 326 is corresponding to the gap 314 in the middle of the first frame element 310a shown in Figure 4 and the second frame element 310b.After lid 320 and framework 310 fit together, be to utilize frictional force and close-fitting is fixed on the framework 310 equally around the lid 320, and fin 326 can be equipped in the gap 314.
See also shown in Figure 5, for the cover plate 322 of avoiding lid 320 be squeezed the distortion after, lid 320 contacts with electronic component on the printed circuit board (PCB) 330 and causes circuit turn-on, similarly, inboard at the cover plate 322 of lid 320 optionally disposes a dielectric film 328, with the situation that prevents that lid 320 and electronic component (not shown) on the printed circuit board (PCB) 330 are short-circuited.In addition, on the cover plate 322 of lid 320, more can have respectively two recess 329a, 329b, cooperate the spare part of its top respectively and design towards the first frame element 310a and second frame element 310b place depression.Similarly, the shape of this two recess 329a, 329b is not limited in rectangle as shown in Figure 4.For instance, the external form of this two recess 329a, 329b also can be cylindrical or any other geometry.
In this embodiment, if lid 320 is when making with known metal cap body, usually the lid of the first frame element 310a and the second frame element 310b need be separated design, but use conductive rubber of the present invention then can finish making with lid 320 is integrally formed with the mode of ejection formation, so, also can reduce the cost of manufacture of whole electromagnetic screen 300.
In sum, electromagnetic screen of the present invention mainly is to utilize the lid of being made up of conductive rubber to replace known metal cap body.When lid combines with framework, be to utilize the elasticity of conductive rubber and frictional force to be tight with on the framework.Therefore, compared to known metal cap body, lid of the present invention the time is not only dismantled on framework easily in maintenance, and the structure of lid be difficult for destroyed, so, the convenience in the time of can improving its dismounting of lid and framework and assembling, and promote the reusability of lid.
Conductive rubber can be made with integrally formed mode, and it is more or less freely that it shapes mode, therefore, can shorten and make the required time of electromagnetic screen.In addition and since the material of conductive rubber and Mold Making cost all than metal material come cheap, therefore, can effectively reduce the cost of manufacture of whole electromagnetic screen.Moreover, when lid must the matching design recess, also can avoid known metal cap body to make recess, and cause the not good problem of yield with the die stamping forming mode.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking aforesaid the claim person of defining.
Claims (8)
1, a kind of electromagnetic screen is arranged on the printed circuit board (PCB) that disposes an electronic component, it is characterized in that it comprises:
One framework is arranged on this printed circuit board (PCB), and wherein, this framework is made up of a metal material, and around this electronic component; And
One lid is incorporated into this framework, and this lid is formed by a conductive rubber, and this lid and this framework form a confined space, to surround this electronic component.
2, electromagnetic screen according to claim 1 is characterized in that wherein this lid more comprises a dielectric film, is disposed at the surface that this lid regards to this framework.
3, electromagnetic screen according to claim 2 is characterized in that wherein this dielectric film is a polyester film.
4, electromagnetic screen according to claim 1 is characterized in that the shape of this lid wherein is the shape corresponding to this framework.
5, electromagnetic screen according to claim 1 is characterized in that wherein this lid and the electric connection of this framework.
6, electromagnetic screen according to claim 1 is characterized in that wherein this lid has a recess towards this framework place depression.
7, electromagnetic screen according to claim 1, it is characterized in that wherein this framework comprises one first frame element and one second frame element, has a gap between this first frame element and this second frame element, this lid has a fin corresponding to this gap, and this fin is to be equipped in this gap.
8, electromagnetic screen according to claim 1 is characterized in that this lid edge wherein is that mode with close-fitting is incorporated into this framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610066396 CN101052267A (en) | 2006-04-05 | 2006-04-05 | Electromagnetic shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610066396 CN101052267A (en) | 2006-04-05 | 2006-04-05 | Electromagnetic shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101052267A true CN101052267A (en) | 2007-10-10 |
Family
ID=38783408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610066396 Pending CN101052267A (en) | 2006-04-05 | 2006-04-05 | Electromagnetic shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101052267A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848459A (en) * | 2015-01-30 | 2016-08-10 | 莱尔德电子材料（上海）有限公司 | Board level electromagnetic interference (EMI) shields with increased under-shield space |
| CN110446414A (en) * | 2019-08-12 | 2019-11-12 | 北京理工大学 | Suction wave electromagnetic shielding and vibration absorber for electronic product |
-
2006
- 2006-04-05 CN CN 200610066396 patent/CN101052267A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848459A (en) * | 2015-01-30 | 2016-08-10 | 莱尔德电子材料（上海）有限公司 | Board level electromagnetic interference (EMI) shields with increased under-shield space |
| CN110446414A (en) * | 2019-08-12 | 2019-11-12 | 北京理工大学 | Suction wave electromagnetic shielding and vibration absorber for electronic product |
| CN110446414B (en) * | 2019-08-12 | 2020-10-23 | 北京理工大学 | Wave-absorbing electromagnetic shielding and vibration-damping device for electronic product |
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