Patent ID: 7465863
Filing Date: 2008-12-16
Classification: G10C

Abstract:
1. A keyboard apparatus comprising: a frame having a key mounting part and a mass member mounting part; keys composed of white keys and black keys that are pivotably supported on the key mounting part via key pivoting parts; mass members that are driven by driving parts provided underside of the keys and are supported pivotably on the mass member mounting part via mass member pivoting parts; and a mass member lower limit stopper and a mass member upper limit stopper that are provided on said frame to restrict a pivot range of said mass members when said keys are driven and when said keys are not driven, wherein each of said mass members includes a mass concentration part that extends more outward in a key longitudinal direction than a position where said mass member upper limit stopper on said frame is disposed, and an upper face of the mass concentration part at a highest lifted position is substantially flush with an upper face of a main body rear end portion of the white key.