EMI shroud with bidirectional contact members

• US 20070212942A1
• Filed: 12/27/2006
• Published: 09/13/2007
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: Molex Incorporated
• Original Assignee: Molex Incorporated
• Inventors: Long, Jerry
• Granted Patent: US 7,455,554 B2
• Time in Patent Office: Days
• US Class Current: 439/607.170
• CPC Class Codes: G02B 6/4201 Packages, e.g. shape, construction, internal or external details
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4256 Details of housings
• CPC Class Codes: G02B 6/4277 Protection against electromagnetic interference [EMI], e.g. shielding means shielding of electric apparatus H05K9/00, of instruments G12B17/00
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
• CPC Class Codes: H01R 13/6584 formed by conductive elastomeric members, e.g. flat gaskets or O-rings
• CPC Class Codes: H01R 13/6594 the shield being mounted on a PCB and connected to conductive members
• CPC Class Codes: H05K 9/0058 specially adapted for optoelectronic applications
• CPC Class Codes: Y10S 439/927 Conductive gasket

Abstract

An EMI gasket takes the form of a formed conductive shroud that completely encircles a metal shielding cage. The shroud has an opening that is surrounded by a plurality of sides and the shroud contains a base portion that has slits formed in a leading edge thereof. The slits define a plurality of spring arms or contacts that are bent in opposing directions so that some of the spring arms extend up and out into contact with a faceplate inserted over the shielding cage and the remaining spring arms extend down and into the shielding cage interior to contact a module inserted therein.

Claims

1. A shielding cage assembly for housing a connector mounted to a circuit board in an electronic device, the assembly comprising:

a metal shielding cage including at least top and bottom walls and a pair of spaced apart sidewalls that cooperate with the top and bottom walls to define an enclosure for housing the connector, the shielding cage including a front end with at least one entrance disposed thereat which leads to an interior portion of said shielding cage, the front end being insertable into an opening of a faceplate of the electronic device, said front end including a plurality of raised spring contacts formed therein that extend away from said shielding cage;

an EMI gasket, the gasket including a conductive shroud that fits around said shielding cage front end, the shroud including a central opening that receives said shielding cage front end therein, said shroud including a base portion and a leading edge portion, the leading edge portion including a plurality of spring contacts, the spring contacts being separated into distinct first and second spring contacts, the first spring contacts extending away from said shielding cage and into contact with the faceplate when said faceplate is inserted over said shielding cage front end, the second spring contacts extending into said shielding cage interior portion.

2. The shielding cage assembly of claim 1, wherein said shroud is a continuous member.

3. The shielding cage assembly of claim 1, wherein said shroud is a two-piece shroud.

4. The shielding cage of claim 1, wherein said first and second spring contacts extend in respective opposite directions.

5. The shielding cage assembly of claim 1, wherein said shroud leading edge includes a plurality of slits formed therein, the slits defining said first and second spring contacts.

6. The shielding cage assembly of claim 1, wherein said first and second spring contacts are arranged in alternating fashion along said shroud leading edge.

7. The shielding cage assembly of claim 6, wherein each of said first and second spring contact have respective widths, the widths of said first spring contacts being greater than the widths of said second spring contacts.

8. The shielding cage assembly of claim 1, wherein said shroud base portions have opening to receive engagement tabs of said shielding cage for mounting said shroud to said shielding cage.

9. The shielding cage assembly of claim 1, wherein said first spring contacts extend outwardly with respect to said shroud base portion and away from said shielding cage, and said second spring contacts extend inwardly with respect to said shroud base portion and into said shielding cage interior portion.

10. The shielding cage assembly of claim 1, wherein said shielding cage front end includes a plurality of slots formed therein, and said shroud second spring contacts extend into said shielding cage interior portion through said slots.

11. The shielding cage assembly of claim 1, wherein said shroud is formed from a plastic and is coated with a conductive plating.

12. The shielding cage assembly of claim 1, wherein is formed from a conductive plastic.

13. An EMI gasket for a shielding cage, the gasket comprising:

a conductive shroud, the shroud having a plurality of sides interconnected to each other and an opening disposed therein, the opening being sized to receive a shielding cage therein, said shroud including a base portion with a front edge, the front edge including a plurality of lengthwise slots formed therein, the slots being spaced apart widthwise along said shroud front edge, the slots defining a plurality of spring contacts along the shielding cage front edge, the spring contacts including distinct first and second spring contacts, the first spring contacts extending away from said shroud base portion in a first direction, and the second spring contacts extending away from said shroud base portion in a second direction, said second direction being opposite said first direction.

14. The EMI gasket of claim 13, wherein said first spring contacts are spaced apart from each other by intervening spaces and said second spring contacts are disposed in said intervening spaces.

15. The EMI gasket of claim 13, wherein said shroud base portion extends in a first plane, and said first and second spring contacts extend in different directions out of and away from the first plane.

16. The EMI gasket of claim 13, wherein said shroud base portion includes menas for attaching said shroud to a shielding cage.

17. An EMI shielding cage assembly for housing a connector mounted to a circuit board in an electronic device, the assembly comprising:

a metal shielding cage including top and bottom walls and a pair of spaced apart sidewalls that cooperatively define an enclosure for housing the connector, the shielding cage including a front end an entrance formed therein which leads to an interior portion of said shielding cage,.the shielding cage front end being insertable into an opening of a faceplate of the electronic device, said front end including a plurality of raised spring contacts formed therein that extend away from said shielding cage;

an EMI gasket, the gasket including a conductive shroud that fits around said shielding cage front end, the shroud including a central opening that receives said shielding cage front end therein, said shroud including a base portion and a leading edge portion, the leading edge portion including a plurality of spring contacts separated into groups of distinct first and second spring contacts, the first spring contacts extending away from said shielding cage and into contact with the faceplate when said faceplate is inserted over said shielding cage front end, the second spring contacts extending into said shielding cage interior portion, each of said first and second spring contact have respective widths, and the widths of said first spring contacts being greater than the widths of said second spring contacts.