Key structure of keyboard

Details Key structure of keyboard Key structure of keyboard

2007-07-03

2007-07-03

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Actuators

Reexamination Certificate

active

11489598

ABSTRACT:
A key mounted in a keyboard includes a key cap including a peg; a base plate including a central first opening a U-shaped first pivot frame including a pivot shaft at its interconnection portion pivotably secured to the base plate, and two end pins pivotably secured to the key cap; a rectangular second pivot frame including a pivot shaft at one end pivotably secured to the base plate, a central second opening, and two arms at the other end pivotably secured to the key cap; a hollow resilient member inserted through the first opening and including a conductive stem; a membrane PCB with the resilient member mounted thereon. A scissor-type resilient support is formed by the crossed first and second pivot frames with the resilient member inserted through the second opening and the peg aligned with the stem.

REFERENCES:
patent: 5947616 (1999-09-01), Liang
patent: 6183150 (2001-02-01), Kao
patent: 6376789 (2002-04-01), Maruyama et al.
patent: 6504121 (2003-01-01), Hasunuma
patent: 6538222 (2003-03-01), Hsu
patent: 6545232 (2003-04-01), Huo-Lu
patent: 6909062 (2005-06-01), Narusawa et al.
patent: 6958458 (2005-10-01), Tsai

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