Patent ID: 8436265
Filing Date: 2013-05-07
Classification: H01H

Abstract:
1. A keyboard comprising: a set of key-switch devices having a base, each key-switch device including a rubber sheet fixed along flat top surfaces of the flat plate-like key tops of the set of key-switch devices, which elastically urges the key tops upward so that the key tops are borne away from the base, the rubber sheet being fixed along the flat top surface of each of the flat plate-like key tops by a plurality of adhesive layers disposed directly between the rubber sheet and each respective flat top surface, wherein the guide member of each key-switch device includes a pair of link mechanisms meshed with each other in a gearing manner, each link mechanism being pivotally connected at an end thereof to a flat bottom surface of the respective key top, wherein each key top is provided at the flat bottom surface with pivot-support sections connected to the respective link mechanisms and a push-down part projecting alongside the pivot-support sections for opening and closing the respective contact, and wherein the rubber sheet is arranged so as to cover the set of key-switch devices from outside and define a plurality of closed spaces for each of the set of key-switch devices, respectively, each closed space accommodating the key top and the link mechanisms of each respective key-switch device.