Movable contact, moveable contact unit including the same,...

Details Movable contact, moveable contact unit including the same,... Movable contact, moveable contact unit including the same,...

2007-06-12

2007-06-12

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

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Double snap

C200S516000

Reexamination Certificate

active

11511449

ABSTRACT:
A movable contact is made of a resilient and electrically conductive thin metal plate so that a depressing operation onto the top thereof allows turning over of the central section thereof. The movable contact is shaped like a dome bowing upward and open downward, and includes at least three projections radially placed at the center where the turn-over occurs. A top view of the projection shows a long and narrow shape extending in the radial direction. The downward protruding amount of the respective projections increases along the radial direction from the center to the outer side, and the respective projections each have a flat face having a given width along the circumferential direction. When the movable contact is in operation, the movable contact touches the object at an outer section of the flat face and along the circumferential direction.

REFERENCES:
patent: 4476355 (1984-10-01), Mital
patent: 4659881 (1987-04-01), Dowe
patent: 6271491 (2001-08-01), Ono et al.
patent: 6563068 (2003-05-01), Yamagata et al.
patent: 6756554 (2004-06-01), Hu
patent: 6855900 (2005-02-01), Urushibata
patent: 7075020 (2006-07-01), Asada
patent: 2000-322974 (2000-11-01), None

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