Threshold microswitch and a manufacturing method thereof

Details Threshold microswitch and a manufacturing method thereof Threshold microswitch and a manufacturing method thereof

1997-05-30

1999-05-18

Walczak, David J.

Electricity: circuit makers and breakers

Snap

Double snap

200408, 337343, H01H5/30

Patent

active

059052414

ABSTRACT:
A threshold microswitch includes a movable electrode, realizing an initial deflection by a difference in residual stresses; an upper electrode, provided at a fixed distance from the movable electrode; and a support mechanism, including a movable electrode support portion which supports both ends of the movable electrode such that a snap-through buckling phenomenon can be used when the movable electrode receives a threshold load. An upper electrode support portion supports the upper electrode such that switching with the movable electrode is realized when the same undergoes snap-through buckling.

REFERENCES:
patent: 2809261 (1957-10-01), Xenakis
patent: 4470033 (1984-09-01), Hofsass
patent: 5010219 (1991-04-01), Kato
patent: 5051643 (1991-09-01), Dworsky et al.
patent: 5619318 (1997-04-01), Yamamoto et al.
The Int'l. Journal of Microcircuits and Electronic Packaging, vol. 19, No. 1, pp. 75-86, "Packaging for Silicon Micromachined Accelerometers," by M. Kniffin et al., 1996.
Sensors and Actuators A 54 (1996) 579-583, "Snapping microswitches with adjustable acceleration threshold" by J.S. Go et al.

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