Patent ID: 8288640

Claim:
A keyboard apparatus comprising: a key supported for pivoting movement about a key pivot point; a mass member that imparts a reaction force to performance operation of the key in interlocked relation to movement of the key; a driving force imparting section that is provided between the key and the mass member and that imparts a driving force to the key and the mass member; and a control section that controls generation of the driving force by the driving force imparting section, wherein the driving force imparting section comprises an actuator that includes a transmission member provided in abutment with both of the key and the mass member to transmit a load from one of the key or the mass member to the other of the key or the mass member, and a drive source that drives the transmission member toward at least one of the key or the mass member, and wherein the transmission member is provided in detachable abutment with the key or the mass member so that the transmission member is disengageable from either the key or the mass member depending on operating conditions of the key and the mass member.