Keyboard unit for electronic musical instrument having a key mot

Details Keyboard unit for electronic musical instrument having a key mot Keyboard unit for electronic musical instrument having a key mot

1993-05-18

1996-02-27

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84719, 84DIG7, G10H 1055, G10H 134

Patent

active

054950740

ABSTRACT:
A keyboard unit for an electronic musical instrument is constructed by a plurality of keys, a key frame, a plurality of key guides and a pressure sensor. On the key frame, a plurality of keys are arranged such that each of them can freely rotate about the predetermined fulcrum point. The key guides are provided on the key frame, while each of the key guides supports each of the keys such that each of the keys can slide along guide surfaces of each of the key guides when the key is depressed. The pressure sensor is provided at the guide surface of the key guide. This pressure sensor senses the pressure applied thereto in a lateral direction corresponding to a disposing direction of the keys in the keyboard unit when the key is depressed. When the key is moved in the lateral direction while being depressed down, the pressure sensor senses the pressure applied to the key in the lateral direction so that the predetermined musical parameter (e.g., tone pitch) of the musical tone to be generated is controlled responsive to the sensed pressure. The pressure sensor can be made by use of the pressure-sensitive rubber or pressure-sensitive ink, of which resistance is altered responsive to the pressure applied to it.

REFERENCES:
patent: 1853630 (1932-04-01), Martenot
patent: 1914831 (1933-06-01), Martenot
patent: 4615252 (1986-10-01), Yamauchi
patent: 4914199 (1990-04-01), Masubuchi et al.
patent: 5107748 (1992-04-01), Muramatsu et al.

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