Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1996-11-19
1998-06-23
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200344, H01H 1370
Patent
active
057708240
ABSTRACT:
A key switch for notebook computers, including a bottom frame having two pairs of upright lugs spaced near two opposite sides, a membrane circuit mounted on the bottom frame, a key cap, a rubber cone supported on the membrane circuit and compressed by the key cap to trigger the membrane circuit in producing an electrical signal, a first link having an annular base and two pairs of springy extension rods respectively extended from the periphery of the annular base at two opposite sides and respectively coupled to the key cap and the bottom frame diagonally, and a substantially U-shaped second link pivotably connected to the annular base of the first link at two opposite sides and coupled between the key cap and the bottom frame diagonally for turning relative to the first link to guide the movement of the key cap vertically.
REFERENCES:
patent: 5278371 (1994-01-01), Watanabe et al.
patent: 5504283 (1996-04-01), Kako et al.
patent: 5555971 (1996-09-01), Takada et al.
Chuo Wen-To
Hsu Fu-Jen
Tsai Ching-Cheng
Chicony Electronics Co. Ltd.
Klein David I.
Lee Jun Y.
Rosenberg Morton J.
Scott J. R.
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