Waterproof structure for a switch device

Details Waterproof structure for a switch device Waterproof structure for a switch device

1991-07-15

1992-05-26

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

2003021, H01H 904, H01H 1906

Patent

active

051170744

ABSTRACT:
A switch device which is operated by movement of a knob coupled to a switch actuator. The knob comprises a projection from a center of an arc-like skirt, wherein the arc-like skirt has a rounded slope extending from the projection to a periphery of the arc-like skirt. A cover arranged over a switch element mounted on a printed substrate defines an opening and has projection walls formed at peripheral edges of the opening, wherein the opening acts to receive the switch actuator, and wherein the arc-like skirt co-acts with the projection walls for preventing water from entering the opening. Liquid contacting the knob flows down the arc-like skirt and is drained through a drain passage formed in the cover. Thus, the switch device is essentially made waterproof by the co-action of the arc-like skirt, the projection walls, and the drain passage.

REFERENCES:
patent: 3586810 (1971-06-01), Brown
patent: 3731030 (1973-05-01), Holzer
patent: 4340791 (1982-07-01), Sorenson
patent: 4533803 (1985-08-01), Beller et al.
patent: 4803317 (1989-02-01), Sutoh et al.

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