H - Electricity – 05 – K
Patent
H - Electricity
05
K
347/9
H05K 5/03 (2006.01) G01R 1/04 (2006.01) G12B 9/00 (2006.01) H02B 1/048 (2006.01) H05K 7/12 (2006.01)
Patent
CA 1054248
PROTECTIVE CASE FOR ELECTRICAL INSTRUMENTS ON CIRCUIT BOARDS ABSTRACT OF THE DISCLOUSURE A protective case for an electrical instrument on a circuit board, arranged to mount the instrument upon a panel in an opening provided therein. The case is character- ized by a housing having an end opening for introduction of the circuit board therein and a snap-in mounting structure for automatically and securely mounting a circuit board with in the housing. The mounting structure includes means forming a ledge, provided for example by four corner platforms molded into the housing, for supporting one side of the circuit board. Two pairs of opposed resilient fingers, pref- erably molded integrally with the walls of the housing, extend with an inward cant along the path of the circuit board from opposite interior sides of the housing to be flexed outwardly by the edges of the circuit board as it is introduced into the housing. The resilient fingers terminate in front faces, preferably formed with beveled stepped surfaces, which are spaced from the ledges to allow the resilient fingers to flex inwardly to fit their front faces against the opposite side of the circuit board when it is positioned with its one side in contact with the ledge. The circuit board thus becomes securely mounted in the housing automatically upon its introduction therein, without resort to separate fasten- ing means or tools. The case further has a back wall aper- tured to receive connector pins on the circuit board, a front cover, and resilient catches extending outwardly from other side walls of the housing for attachment of the housing to an instrument panel.
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