Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1996-09-23
1997-10-14
Phillips, Michael W.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
400490, 400682, 200 5A, 200344, 200345, G06F 116, B41J 1156, H05K 704, B01H 1302
Patent
active
056778260
ABSTRACT:
A notebook computer is provided with a collapsible keyboard structure in which the keys are vertically moveable, toward and away from an underlying key support structure, through a stroke distance. Each key has an upper return spring member secured to and depending therefrom, and overlies a lower return spring member secured to a signal pad structure that underlies the key support structure and is horizontally shiftable relative thereto. As each key is manually depressed through its stroke distance its associated separate upper and lower return spring members cooperate in series to resiliently resist the downward movement of the key through its entire stroke distance, and also function to return the key to its upwardly extended pre-stroke position. In response to a horizontal shifting of the signal pad structure relative to the key support structure, each key is driven downwardly to a retracted storage and transport orientation thereof. The separate upper and lower return spring members associated with each key, in response to retraction of the key, are moved to a horizontally side-by-side position that permits the key retraction without appreciable vertical compression of the bottom return spring member which, with the key being moved through its operative key stroke, would otherwise cause the forcible engagement of a pair of electrical contacts underlying the bottom spring member.
REFERENCES:
patent: 5324902 (1994-06-01), Shen
patent: 5380970 (1995-01-01), Mizuno et al.
patent: 5424516 (1995-06-01), Emmons
patent: 5466901 (1995-11-01), Mochizuki
patent: 5512722 (1996-04-01), Ozeki et al.
Compaq Computer Corporation
Phillips Michael W.
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