Chip type high frequency coil device

Details Chip type high frequency coil device Chip type high frequency coil device

1982-09-22

1984-01-24

Kozma, Thomas J.

Inductor devices

Core forms casing

336 84R, 336 87, 336136, 336192, H01F 1502, H01F 1504

Patent

active

044279612

ABSTRACT:
In a high frequency coil device including a drum core having a lower flange and a shield casing to be securely attached thereto, lugs are provided at the lower ends of a pair of opposing side walls of the shield casing; grooves are formed in a pair of opposing side walls of the lower flange; and the lower ends of those side walls of the shield casing which are provided with the lugs are located at a higher level than the lower ends of the remaining side walls of the shield casing which are provided with no lugs. The lugs are disposed in engagement with the aforementioned grooves and bent into contact with the lower flange. The lower ends of the side walls provided with the lugs are disposed in abutment with the upper surface of the lower flange, and inner surface portions, adjacent to the lower ends, of the side walls provided with no lugs are disposed in engagement with the other opposing side walls of the lower flange. In this way, the shield casing is securely attached to the drum core in such a manner that it can be prevented from being vertically displaced, through the engagement of the lower ends of the side walls with the upper surface of the lower flange and through the engagement of the bent lugs with the lower surface of the lower flange, and it can also be prevented from being horizontally displaced, through the engagement of the lugs with the grooves and through the engagement of the aforementioned inner surface portions of the shield casing with the side surfaces of the lower flange.

REFERENCES:
patent: 3090907 (1963-05-01), Maeda
patent: 3601734 (1971-08-01), Chesney

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