| 摘要 |
<p>A keyboard instrument is provided in order to further improve expressiveness as a keyboard instrument while ease in performing is ensured. In the keyboard, a plurality of keys is lined up in order, and each supported so as to be pivotable about a supporting point. The keys include first keys, second keys, and third keys. The first keys, the second keys, and the third keys constitute key portions, in which the first keys, the second keys, and the third keys are respectively lined up according to types of the keys in a lateral direction and disposed in order of the first keys, the second keys, and the third keys from a front side. The key portions are disposed on a plurality of steps in an up-and-down direction. Each of the key portions is constituted such that between two first key pieces, having a pitch different by a whole tone, cutouts are formed in mutually facing portions of the respective first keys, and two second key pieces are disposed therein; between two second key pieces adjacently disposed, cutouts are formed in mutually facing portions of the respective second keys, and one piece of the third keys is disposed therein; between two first key pieces, having a pitch different by a half tone, cutouts are formed in mutually facing portions of the respective first keys, and one piece of the second keys is disposed therein. Therefore, the pitch between the first keys and the second keys adjacently disposed, and the pitch between the second keys and the third keys adjacently disposed respectively become quarter tones.</p> |
