Patent ID: 7544876
Filing Date: 2009-06-09
Classification: G10C

Abstract:
1. A keyboard apparatus of an electronic keyboard instrument, comprising a plurality of keys constituting at least one key unit and formed integrally with one another by being connected in a rear of key main bodies to a common base end via key-fulcrum function devices that permit the keys to be pivotable in a key depression/release direction, and a key frame to which the common base end is fixed, wherein: each of the key-fulcrum function devices includes a vertical hinge and a left-to-right hinge that are coupled to each other; the vertical hinge is formed into a thin plate-like piece member that is thin with respect to a longitudinal direction of the keys, extends downward of the keys, and that permits a distal end of the key concerned to be pivotable in the key depression/release direction; the left-to-right hinge is formed into a thin plate-like piece member that is thin with respect to a width direction of the keys, extends in the longitudinal direction of the keys, and permits the distal end of the key concerned to be displaceable in the width direction of the keys; and one of the vertical hinge and the left-to-right hinge is connected to a rear portion of the key main body concerned, and another of the vertical hinge and the left-to-right hinge is coupled to the common base end.