Rockin’ Patent – Roland Corporation’s “Keyboard Device”
Rockin’ Patent: US Patent No. 8,445,765 Filed: 5 January 2012 In the name of: Roland Corporation Title: Keyboard Device What’s claimed: “A keyboard device, comprising: a key, supported by a chassis in a free-rotation manner; a hammer, displaced rotationally corresponding to a key-pressing operation or a key-releasing operation of the key to provide an action load to the key; a protrusion, projected at a specific position on the hammer or the key, and displaced corresponding to the key-pressing operation or the key-releasing operation; a sliding surface, formed on any one of the chassis, the key, and the hammer, and having a […]
