Patent ID: 8013228

Claim:
An electronic keyboard musical instrument comprising: a keyboard assembly including a plurality of juxtaposed keys and a plurality of juxtaposed inertia presenting mechanisms, each of the juxtaposed keys being swingably supported on a first swing fulcrum for assuming an undepressed position and a depressed position, and each of the inertia presenting mechanisms being swingably supported on a second swing fulcrum and swingably linked to each corresponding one of the keys; a key bed provided underneath the keyboard assembly for supporting the keyboard assembly, the key bed defining a front edge which is toward an instrument player and a rear edge which is away from the instrument player, the key bed having an aperture provided between the front edge and the rear edge; and an actuator unit having a plurality of actuating members, each of the actuating members being associated with each corresponding one of the inertia presenting mechanisms and arranged at a position which is nearer than the first swing fulcrum to the front edge of the key bed for actuating the corresponding inertia presenting mechanism to bring the associated key from the undepressed position to the depressed position, the actuator unit further having at least an upper and an lower yoke, at least one of the yokes having a channel member and flange members, the channel member disposing the actuating members to penetrate the aperture of the key bed toward the inertia presenting mechanisms, the flange members extending outward from the channel member for fastening the actuator unit to the key bed across and over the aperture.