Patent ID: 6670562
Filing Date: 2003-12-30
Classification: H01H

Abstract:
A muliti-direction-operative key, comprising:a key top made of hard resin; a key base made of rubber-like elastic body loading the key top on its surface; and a plurality of switch pressuring projections, each of which is made of the same material as that of the key base and extends vertically from a rear surface of the key base opposite to the surface loading the key top, wherein the switch pressuring projections are respectively provided at the position just below the center of the key top and at intersection points of a plurality of concentric circles surrounding the center of the key top and radii of the key top in its inclination directions, wherein lengths of the switch pressuring projections in the inclination directions are made to be different for the concentric circles and the speed at which the key top is inclined is detected by measuring the time intervals at which switch elements are turned on.