Patent ID: 9508325
Filing Date: 2016-11-29
CPC Classification: G10C

Claim Text:
1. A white key of a keyboard instrument, the white key comprising: an upper wall elongated in a front and rear direction; and a pair of side walls extending downward respectively from right and left edges of the upper wall and each elongated in the front and rear direction, the upper wall and the pair of side walls defining an inner space opening downward, the upper wall and the pair of side walls comprising a narrow portion and a wide portion that is greater than the narrow portion in width in a right and left direction, the white key comprising right and left portions located respectively to right and left of a center line of the narrow portion in the right and left direction, a one-side portion as one of the right and left portions and an other-side portion as another of the right and left portions being different from each other in construction to adjust a balance of load between the right and left portions with respect to the center line.