Keyboard apparatus for electronic musical instrument with key de

Details Keyboard apparatus for electronic musical instrument with key de Keyboard apparatus for electronic musical instrument with key de

1995-10-12

1998-02-17

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84719, 84744, G10C 304, G10C 312

Patent

active

057193479

ABSTRACT:
A keyboard apparatus for an electronic musical instrument includes a key displacement detection unit. The key displacement detection unit includes a first resilient member, a movable member connected to the first resilient member, a second resilient member connected to the movable member, and a base fixing member connected to the second resilient member. The base fixing member may be directly or indirectly fixed to a keyboard musical instrument so that the key displacement detection unit is mounted to the keyboard musical instrument. A first displacement detection sensor is coupled with the first resilient member for detecting a key depression force in a key depression-release direction, and a second displacement detection sensor is coupled with the second resilient member for detecting a key depression force in a key arrangement direction. Both the first displacement detection sensor and the second displacement sensor are mounted on the key displacement detection unit. The first resilient member and the second resilient member are connected to the movable member in a folded manner. As a result, the key displacement detection unit becomes small in size and yet provides a relatively large displacement in the first and the second resilient members with a relatively small key depression force.

REFERENCES:
patent: 3979990 (1976-09-01), Hinago
patent: 5453571 (1995-09-01), Adachi et al.
patent: 5495074 (1996-02-01), Kondo et al.

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