CN101083897B - Electromagnetic shielding device and method for making the same - Google Patents
Electromagnetic shielding device and method for making the same Download PDFInfo
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- CN101083897B CN101083897B CN2006100836269A CN200610083626A CN101083897B CN 101083897 B CN101083897 B CN 101083897B CN 2006100836269 A CN2006100836269 A CN 2006100836269A CN 200610083626 A CN200610083626 A CN 200610083626A CN 101083897 B CN101083897 B CN 101083897B
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- conductive rubber
- lid
- electromagnetic screen
- sidewall
- circuit board
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Abstract
The present invention is an electromagnetic shielding device which is set on a printer circuit board. The electromagnetic shielding device includes a covering part and a conductive rubber casing. The covering part is composed of one conductive material, and includes a covering board and sidewall connecting to the covering board around. The sidewall extends to the printed circuit board, and has a inside surface, an outside surface relative to the inside surface, and at least one throughout hole. The conductive rubber casing covers the inside and outside surfaces of the sidewall, and fills the throughout hole with part of itself which fixes the casing on the sidewall. The conductive rubber casing also contacts to the printed circuit board, establishing an electrical connect with an earth terminal of the circuit board. The covering part and conductive rubber casing forms an enclosure space to envelop the electrical components integrated on the printed circuit board, and keep them from the disturbance of electromagnetic wave.
Description
Technical field
The invention relates to a kind of electromagnetic screen and preparation method thereof, particularly relevant for a kind of with conductive rubber (Conductive Rubber) as electromagnetic screen of framework and preparation method thereof.
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) (PrintedCircuit Board) in the phone, be used for preventing electromagneticly leaking or avoiding external electromagnetic waves to infiltrate and the interference that causes.
Figure 1A illustrates the three-dimensional exploded view into known a kind of electromagnetic screen; Figure 1B illustrate into after the electromagnetic screen shown in Figure 1A combination stereogram.Please also refer to 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 the surface adhering 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 be utilize the SMT processing procedure will be fixed on the printed circuit board (PCB) 130, therefore,, more can cause the difficulty of maintenance back assembling if destroyed the integrality of metal framework 110 accidentally.
In addition, electromagnetic screen comparatively commonly used at present, the part of its lid and framework all is made with metal material, at considering of metallic conduction efficient, it makes raw material is primary raw material with the preferable copper of conductivity usually, but since the price one of metal material to not low, especially in recent years along with former material price rises steadily, the copper raw material price is also surging successively, and therefore, it is many that metallic electromagnetic screen production cost is also improved thereupon.
Summary of the invention
The purpose of this invention is to provide a kind of electromagnetic screen, this electromagnetic screen is to utilize conductive rubber to make the part of framework, the problem that dismounting is difficult for when being caused maintenance to solve the known framework that utilizes metal material to make.
Another object of the present invention provides a kind of manufacture method of electromagnetic screen, and is known when utilizing metal material to make electromagnetic screen to solve, the production cost problem of higher that is suffered from.
For reaching above-mentioned or other purposes, the present invention proposes a kind of electromagnetic screen, is arranged on the printed circuit board (PCB).Electromagnetic screen comprises a lid and a conductive rubber frame.Lid is made up of an electric conducting material, and has at least one perforation.The conductive rubber frame comprises that a cover portion is coated on the edge of this lid, and at least one plug portion, and this cover portion is arranged in this perforation, and the two ends of this plug portion are connected with this cover portion respectively, makes the conductive rubber frame be fixed in lid.And the conductive rubber frame contacts with printed circuit board (PCB), and electrically connects with the earth terminal of printed circuit board (PCB), and wherein, lid forms a confined space, and electronic component places this accommodation space, makes lid and conductive rubber frame surround this electronic component.
In one embodiment of this invention, above-mentioned electric conducting material is a metal.
In one embodiment of this invention, the sidewall that lid comprises cover plate and is connected in this cover plate, perforation is arranged at sidewall.
In one embodiment of this invention, the cover portion (Sheath Portion) in the above-mentioned conductive rubber frame is coated on sidewall.
In one embodiment of this invention, above-mentioned conductive rubber frame more comprises at least one location division, the location division is to extend towards the direction of printed circuit board (PCB), and printed circuit board (PCB) has a location hole corresponding to the location division, the location division can be installed on location hole, lid and conductive rubber is confined be positioned on the printed circuit board (PCB).
For reaching above-mentioned or other purposes, the present invention more proposes a kind of manufacture method of electromagnetic screen, comprises a lid is provided, and lid is made up of an electric conducting material, and has at least one perforation, and lid forms an accommodation space; And carry out a flush type jetting process, utilize a conductive rubber material to form a conductive rubber frame, this conductive rubber frame comprises a cover portion and at least one plug portion, and this cover portion is coated on the edge of lid, this plug portion is arranged in this perforation, and the two ends of this plug portion are connected with this cover portion respectively.
In one embodiment of this invention, above-mentioned electric conducting material is a metal.
In one embodiment of this invention, the sidewall that above-mentioned lid comprises cover plate and is connected in this cover plate, perforation is arranged at sidewall.
In one embodiment of this invention, the cover portion in the above-mentioned conductive rubber frame is coated on sidewall, and the location division protrudes in conductive rubber frame table face.
The conductive rubber frame that electromagnetic screen of the present invention mainly comprises a lid and is coated on lid, the mode that this conductive rubber frame can utilize flush type to penetrate directly is made on the lid, so, can simplify the component number and the installation procedure thereof of electromagnetic screen effectively.In addition, because conductive rubber material itself promptly has elasticity, therefore, in the time of can solving tradition and make the lid of electromagnetic screen and framework with metal material, the dismounting that is caused is difficult for and the low problem of reusability.Moreover, because the conductive rubber cost of material is low lower with its mould development cost, therefore, also help to reduce the cost of manufacture of whole electromagnetic screen.
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 three-dimensional exploded 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 three-dimensional exploded 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 illustrates and is the cutaway view of the electromagnetic screen shown in Fig. 2 B along I-I ' hatching.
100: known electromagnetic screen 110: metal framework
110a: outer surface 112: protuberance
120: metal cap body 122: cover plate
124: sidewall 126: perforation
130: printed circuit board (PCB) 200: electromagnetic screen
210: printed circuit board (PCB) 216: location hole
220: lid 222: cover plate
224: sidewall 226: inner surface
228: outer surface 230: perforation
232: bottom surface 240: the conductive rubber frame
242: cover portion 244: plug portion
246: the location division
Embodiment
Fig. 2 A illustrates the three-dimensional exploded 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 also refer to Fig. 2 A and Fig. 2 B, electromagnetic screen 200 mainly comprises a lid 220, and a conductive rubber frame 240, and lid 220 is made up of metal material, and conductive rubber frame 240 is made up of conductive rubber.Electromagnetic screen 200 is arranged on the printed circuit board (PCB) 210, to surround an electronic component (not shown) that is disposed on the printed circuit board (PCB) 210; Isolating the external electromagnetic ripples for the interference that electronic component was caused on the printed circuit board (PCB) 210, and can prevent electromagnetic leaking by electromagnetic screen 200.
Fig. 3 illustrates and is the cutaway view of the electromagnetic screen shown in Fig. 2 B along I-I ' hatching.Please also refer to Fig. 2 A and Fig. 3, lid 220 comprises that a cover plate 222 and is connected in cover plate 222 sidewall 224 on every side, and wherein, sidewall 224 is to extend towards the direction of printed circuit board (PCB) 210.Sidewall 224 has an inner surface 226, an outer surface 228, a plurality of perforation 230 and a bottom surface 232 relative with inner surface 226.Perforation 230 can be slotted hole or other geometries shown in Fig. 2 A, as circular hole, square hole or rectangular opening etc.
Please refer to Fig. 3, conductive rubber frame 240 is the forms that are a framework, and closely be coated on inner surface 226, outer surface 228 and the bottom surface 232 of sidewall 224, and partially conductive rubber frame 240 is to be filled in the perforation 230, conductive rubber frame 240 is fixed on the sidewall 224 of lid 220.Further, as shown in Figure 3, conductive rubber frame 240 comprises a cover portion 242, a plurality of plug portion 244 and a plurality of location division 246, and cover portion 242 has a bottom 248.Cover portion 242 is coated on around inner surface 226, outer surface 228 and the bottom surface 232 of the sidewall 224 of lid 220.Plug portion 244 is provided with corresponding to the perforation 230 of sidewall 224, and is arranged in perforation 230; In addition, plug portion 244 two ends are connected with the cover portion 242 of inner surface 226 that is coated on sidewall 224 and outer surface 228 respectively.So, conductive rubber frame 240 can be fixed on the sidewall 224 of lid 220, and can not break away from from lid 220.The present invention does not impose any restrictions for the number and the position of perforation 230 and plug portion 244.Moreover, in the bottom 248 of conductive rubber frame 240 a plurality of location divisions 246 of extending to printed circuit board (PCB) 210 are set optionally, with usefulness as the location.
When lid 220 combines with conductive rubber frame 240 with after forming electromagnetic screen 200, corresponding positioning hole 216 on the printed circuit board (PCB) 210 is inserted in location division 246 by conductive rubber frame 240, can make 210 of electromagnetic screen 200 and printed circuit board (PCB)s can form a confined space shown in Fig. 2 B, be disposed at electronic component on the printed circuit board (PCB) 210 with encirclement.Electromagnetic screen 200 can utilize the spare part that is positioned at its top to limit its position, comes off from printed circuit board (PCB) 210 to prevent electromagnetic screen 200.In addition; please refer to Fig. 3; because conductive rubber frame 240 is closely to be coated on around the sidewall 224 of lid 220; therefore; the two is constituted electrically connect, so, the electromagnetic wave that the lid 220 of electromagnetic screen 200 is absorbed; can conduct to the earth terminal (not shown) of printed circuit board (PCB) 230 via conductive rubber frame 240, the electronic component that is disposed on the printed circuit board (PCB) 210 with protection avoids being subjected to electromagnetic interference.
And the production method of above-mentioned electromagnetic screen 200 is earlier a sheet metal to be cut out the required external form of lid 220, and finishes the punching at perforation 230 places, and afterwards, the mode with drawing forms sidewall 224 again.After finishing the making of lid 220 parts, utilize conductive rubber material to carry out a flush type jetting process again, on the sidewall 224 of lid 220, to form a conductive rubber frame 240, this conductive rubber frame 240 is inner surface 226, outer surface 228 and the bottom surfaces 232 that are coated on sidewall 224, and the conductive rubber frame 240 (being plug portion 244) of part can be filled in the perforation 230, and conductive rubber frame 240 is fixed on the sidewall 224 of lid 220.So, promptly finish the making of electromagnetic screen 200 of the present invention.
In sum, conductive rubber frame of the present invention is that the mode of utilizing flush type to penetrate directly is made on the sidewall of metal cap body, making electromagnetic screen of the present invention is single element design, compared to its metal cap body of known electromagnetic screen and metal framework is the design of two independent components, can effectively simplify the number and the installation procedure thereof of element.
In addition, the present invention is that the location division with electromagnetic screen is inserted in the location hole on the printed circuit board (PCB), utilize again and limit its position with combining of other spare parts, electromagnetic screen is fixed on the printed circuit board (PCB), electromagnetic screen is fixed on the printed circuit board (PCB) to replace the known SMT of utilization processing procedure.Therefore, compared to known metal electromagnetic screen, the present invention not only disassembles on printed circuit board (PCB) 210 when maintenance easily, and when dismounting, do not have the problem of destroying lid or frame structure and take place, so, can effectively improve the reusability of electromagnetic screen 200.Further,, therefore, also can avoid because of using hand tool to destroy the possibility of framework accidentally because dismounting can not need be used any hand tool during lid, and the convenience can improve lid and its dismounting of framework and assembling the time.
Moreover, since the material cost of conductive rubber and Mold Making cost all than metal material come cheap, therefore, the present invention can also effectively reduce the cost of manufacture of whole electromagnetic screen.
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 the claim person of defining.
Claims (10)
1. an electromagnetic screen is arranged on the printed circuit board (PCB) that disposes an electronic component, and it has an earth terminal, it is characterized in that this electromagnetic screen comprises:
One lid is made up of an electric conducting material, and has at least one perforation, and this lid forms an accommodation space; And
One conductive rubber frame comprises:
One cover portion is coated on the edge of this lid; And
At least one plug portion, be arranged in this perforation, and the two ends of this plug portion are connected with this cover portion respectively, make this conductive rubber frame be fixed in this lid, and this conductive rubber frame contacts with this printed circuit board (PCB), and electrically connect with this earth terminal, and this electronic component places this accommodation space, make this lid and this conductive rubber frame surround this electronic component.
2. electromagnetic screen according to claim 1 is characterized in that wherein this electric conducting material is a metal.
3. electromagnetic screen according to claim 1 is characterized in that wherein this lid comprises that a cover plate and is connected in the sidewall of this cover plate, and this perforation is arranged at this sidewall.
4. electromagnetic screen according to claim 3 is characterized in that this cover portion in this conductive rubber frame wherein, is coated on this sidewall.
5. electromagnetic screen according to claim 1, it is characterized in that wherein this conductive rubber frame comprises at least one location division, be to extend towards the direction of this printed circuit board (PCB), this printed circuit board (PCB) has a location hole corresponding to this location division, this location division can be installed on this location hole, this lid and this conductive rubber is confined be positioned at this printed circuit board (PCB).
6. the manufacture method of an electromagnetic screen is characterized in that it may further comprise the steps:
One lid is provided, and this lid is made up of an electric conducting material, and has at least one perforation, and this lid forms an accommodation space; And
Carry out a flush type jetting process, utilize a conductive rubber material to form a conductive rubber frame, this conductive rubber frame comprises a cover portion and at least one plug portion, and this cover portion is coated on the edge of this lid, this plug portion is arranged in this perforation, and the two ends of this plug portion are connected with this cover portion respectively.
7. the manufacture method of electromagnetic screen according to claim 6 is characterized in that wherein this electric conducting material is a metal.
8. the manufacture method of electromagnetic screen according to claim 6 is characterized in that wherein this lid comprises that a cover plate and is connected in the sidewall of this cover plate, and this perforation is arranged at this sidewall.
9. the manufacture method of electromagnetic screen according to claim 8 is characterized in that this cover portion in formed this conductive rubber frame of this flush type jetting process wherein, is coated on this sidewall.
10. the manufacture method of electromagnetic screen according to claim 6 is characterized in that wherein this conductive rubber frame also comprises at least one location division, protrudes in this conductive rubber frame table face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100836269A CN101083897B (en) | 2006-05-29 | 2006-05-29 | Electromagnetic shielding device and method for making the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100836269A CN101083897B (en) | 2006-05-29 | 2006-05-29 | Electromagnetic shielding device and method for making the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101083897A CN101083897A (en) | 2007-12-05 |
| CN101083897B true CN101083897B (en) | 2011-02-23 |
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ID=38913090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100836269A Active CN101083897B (en) | 2006-05-29 | 2006-05-29 | Electromagnetic shielding device and method for making the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101083897B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105283054B (en) * | 2014-06-10 | 2019-05-31 | 中兴通讯股份有限公司 | Radio-frequency shielding fence and mobile terminal |
| CN107484403B (en) * | 2017-09-19 | 2020-02-14 | Oppo广东移动通信有限公司 | Shielding case, circuit board assembly and electronic equipment |
| WO2022226711A1 (en) * | 2021-04-26 | 2022-11-03 | Honeywell International Inc. | Building controller with lateral side shielding |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368369A (en) * | 1980-03-14 | 1983-01-11 | Citizen Watch Co., Ltd. | Electrical switch |
| CN2511101Y (en) * | 2001-12-06 | 2002-09-11 | 蔡兰香 | Apparatus for stopping electromagnetic wave interference of circuit board |
| CN1409942A (en) * | 1999-10-12 | 2003-04-09 | 电子设备屏蔽公司 | EMI shielding apparatus |
-
2006
- 2006-05-29 CN CN2006100836269A patent/CN101083897B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4368369A (en) * | 1980-03-14 | 1983-01-11 | Citizen Watch Co., Ltd. | Electrical switch |
| CN1409942A (en) * | 1999-10-12 | 2003-04-09 | 电子设备屏蔽公司 | EMI shielding apparatus |
| CN2511101Y (en) * | 2001-12-06 | 2002-09-11 | 蔡兰香 | Apparatus for stopping electromagnetic wave interference of circuit board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101083897A (en) | 2007-12-05 |
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