Water-and-dust-proof push-button switch housing dummy terminal f

Details Water-and-dust-proof push-button switch housing dummy terminal f Water-and-dust-proof push-button switch housing dummy terminal f

1988-12-05

1990-04-03

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200406, H01H 902

Patent

active

049132857

ABSTRACT:
A push-button switch of a water- and dust-proof structure wherein a good operating force charateristic is always assured. The push-button switch has a dummy terminal which is not to be directly soldered to a wiring pattern and is provided at a location of the push-button switch to which flux which appears when a terminal is being soldered to the wiring pattern does not come around. When the switch is soldered to a printed circuit board for the wiring pattern, flux may not possibly enter a gap between a case of the switch and the dummy terminal. After mounting of the switch on the printed circuit board, communication of air between inside and outside the case is assured by the gaps so that the inside of the case is maintained at an equal pressure with external air.

REFERENCES:
patent: 4331851 (1982-05-01), Johnson
patent: 4398069 (1983-08-01), Olsson

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