Patent ID: 7576273
Filing Date: 2009-08-18
Classification: G10H

Abstract:
1. A chassis that is used for a keyboard system having a plurality of keys and a plurality of hammers, the chassis comprising a chassis main body with which the plurality of keys and the plurality of hammers are supported such that swinging is possible and such that each of the hammers has a lengthwise dimension extending along a first direction from a pivot point of the hammer to a weighted end of the hammer, and each of the keys has a lengthwise dimension extending along a second direction generally the same as the first direction from a pivot point of the key to a free end of the key, and an upper limit control member and a lower limit control member with which the upper surface and the lower surface of the hammers are respectively contacted to control the swinging of the hammers when the hammers swing from the pressing or the releasing of the keys that are supported by the chassis main body, wherein the chassis main body comprises a plurality of walls; wherein each of the walls is disposed between a corresponding pair of adjacent ones of the hammers; wherein each of the walls comprises a portion that extends at least from an elevation of the lower limit control member at least to an elevation of the upper limit control member; and wherein a lengthwise dimension of each of the walls extends from a pivot end of the key to the weighted end of the hammer, such that the walls are configured to provide a housing for the hammers with respect to the first direction.