Case for shielding electronic circuit members from electromagnet

Details Case for shielding electronic circuit members from electromagnet Case for shielding electronic circuit members from electromagnet

1994-06-07

1996-02-20

Tolin, Gerald P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

165 803, 361796, 361818, H05K 720

Patent

active

054934737

ABSTRACT:
Cooling air compulsorily introduced from an air inflow hole 18 into a duct 10 by means of a fan 5 is compressed within the duct 10 and enters a duct 13 from an air outflow hole 11 through an air inflow hole 12 to be injected into a package 23 from an air outflow hole 14 through an air inflow hole 15. Subsequently, it flows along both surfaces of a printed circuit board 21, during which it exchanges heat with the heat evolving portion of the printed circuit board 21 to flow out from an air outflow hole 16 into the container body 1. From the interior of a container body 1, air flows out through an air outflow hole 17 to the exterior. The printed circuit board 21 can be cooled efficiently with a small air flow rate and an excellent performance of electromagnetic shielding can be achieved.

REFERENCES:
patent: 3648113 (1972-03-01), Rathjen
patent: 3956673 (1976-05-01), Seid
patent: 4149218 (1979-04-01), Carrubba
patent: 4797782 (1989-01-01), Wistling
patent: 4821145 (1989-04-01), Corfits et al.
patent: 5099391 (1992-03-01), Maggelet
patent: 5206796 (1993-04-01), Thompson
patent: 5231561 (1993-07-01), Johnson
patent: 5243493 (1993-09-01), Jeng

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