Abstract: A keyboard device has a plurality of keys, each key having a support base where one end of each key is supported and is arranged to allow for movement, and a plate that hides the surface of the base. The keys are created with ultrasonic welding once the base and the plate merge. Thus, it is possible to weld while merging the base and the plate together, because the base and the plate are connected by ultrasonic welding. Compared to pasting the two together using traditional adhesives, it is possible to have the base securely bound to the plate. It is then possible to have performers use the device for an extended period of time. The result is the ability to curb the chances of the base and the plate becoming loose.

Abstract: A keyboard device has a plurality of keys, each key having a support base where one end of each key is supported and is arranged to allow for movement, and a plate that hides the surface of the base. The keys are created with ultrasonic welding once the base and the plate merge. Thus, it is possible to weld while merging the base and the plate together, because the base and the plate are connected by ultrasonic welding. Compared to pasting the two together using traditional adhesives, it is possible to have the base securely bound to the plate. It is then possible to have performers use the device for an extended period of time. The result is the ability to curb the chances of the base and the plate becoming loose.