Keyboard apparatus for electronic musical instrument having coop

Details Keyboard apparatus for electronic musical instrument having coop Keyboard apparatus for electronic musical instrument having coop

1992-03-13

1993-09-07

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84DIG7, G10H 310, G10H 134

Patent

active

052431258

ABSTRACT:
In a keyboard apparatus for an electronic musical instrument having jacks and hammers, each jack is rotatable by a force to be transmitted from a key when the key is depressed, and each of the hammers is rotatable by a force to be transmitted from the rotatable jack. Respective jack is rotatably disposed relative to the respective key by fitting a first supporting shaft formed in the respective jack into a first bearing recess formed in the respective key. Respective hammer is rotatably disposed in a keyboard chassis by fitting a second supporting shaft formed in one of the keyboard chassis and the respective hammer into a second bearing recess formed in the other of the keyboard chassis and the respective hammer. A resilient member is disposed between the respective hammer and the respective jack by engaging one end and the other end of the resilient member with the hammer and the jack, respectively, such that the first supporting shaft and the first bearing recess and the second supporting shaft and the second bearing recess are respectively pressingly held together and that the respective key and the respective jack are returned to their respective original positions.

REFERENCES:
patent: 3735076 (1973-05-01), Iijima
patent: 4058044 (1977-11-01), Murakami
patent: 4168649 (1979-09-01), Goldenberg
patent: 4723471 (1988-02-01), Sugimoto
patent: 4901614 (1990-02-01), Kumano et al.
patent: 4993305 (1991-02-01), Franz et al.
patent: 5003859 (1991-04-01), Monte et al.
patent: 5062342 (1991-11-01), Nagatsuma
patent: 5079985 (1992-01-01), Yamaguchi et al.

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