Keyboard apparatus with an improved mass member support system

Details Keyboard apparatus with an improved mass member support system Keyboard apparatus with an improved mass member support system

1997-01-28

1998-10-13

Shoop, Jr., William M.

Music

Instruments

General features

84434, G10C 312

Patent

active

058214437

ABSTRACT:
A keyboard apparatus has a relatively simple structure to guide a mass member without using a spring to provide high quality performance with stable operation. The rotational moment force of the mass member acts in a uniform direction against a rotation support section that supports the mass member upon depression and release of an associated key so that the generation of mechanical noise and the development of clattering movement at the rotating support section are substantially prevented. The keyboard apparatus has a key that is movably supported on a support member, and a mass member rotatably supported by a rotation center section of the support section and driven by the key. The keyboard apparatus further includes a guide member that slidably guides the mass member and positions the mass member with respect to the key arrangement direction and at a specified location removed from the rotating center section of the mass member.

REFERENCES:
patent: 4901614 (1990-02-01), Kumano et al.

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