The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 13, 1998
Filed:
Feb. 20, 1997
Fujitsu Takamisawa Component Limited, Tokyo, JP;
Abstract
A keyboard switch having a dustproof and droplet-proof push-button includes an elastic tube having upper and lower open ends fastened to a slider capped with a keytop and a panel supporting the push-button, respectively, to prevent a dust or droplet of water from being sucked into a space under the slider connecting to an area where pressure sensitive electric switches are located. The elastic tube is collapsible telescopically when the keytop is pushed down, but recovering the original shape by its own elasticity when the pushing force on the keytop is removed. One embodiment of the present invention is one having another elastic member mounted between the slider and one of immobile members, which works predominantly in the final stage of the stroke of the keytop to protect the pressure sensitive electric switch from an excessive impact of tapping.