Patent ID: 9012795
Filing Date: 2015-04-21
Classification: H01H,Y10T

Abstract:
1. A keyboard for a computing device, comprising: at least one key comprising a key cap; an elastomeric dome comprising a first base portion and a plunger portion, the elastomeric dome being attached to and extending from an underside of the key cap; and a metal dome comprising a dome portion and a second base portion, the second base portion being attached to the first base portion of the elastomeric dome, the second base portion of the metal dome being configured to attach to a membrane comprising a top layer having a first contact attached to an underside of the top layer, a bottom layer having a second contact attached to a top side of the bottom layer, and a spacer layer between the top and bottom layers having a void between the first and second contacts, the metal dome being disposed beneath the elastomeric dome and with respect to the elastomeric dome such that when the at least one key is fully depressed, the elastomeric dome collapses and the plunger portion of the elastomeric dome deflects the dome portion of the metal dome to collapse the metal dome into contact with the top layer of the membrane to connect the first and second contacts and when the elastomeric dome is in a relaxed state the plunger portion of the elastomeric dome does not contact the dome portion of the metal dome.