An improved positioning structure of pushbutton in keyboard (2) comprises a base, a printed circuit board (PCB) attached on the base having a plurality of pivot-jointing portions protrusively disposed on its surface for defining a plurality of enclosed assembly-jointing sections, a link (bridge) disposed...http://www.google.es/patents/US6166342?utm_source=gb-gplus-sharePatente US6166342 - Pushbutton in keyboard (2)
