Key actuating apparatus

Details Key actuating apparatus Key actuating apparatus

2011-05-03

2011-05-03

Qin, Jianchun (Department: 2832)

Music

Instruments

Automatic

C084S439000

Reexamination Certificate

active

07935875

ABSTRACT:
In order to improve a touch of a key of a keyboard musical instrument by using a key actuating apparatus which actuates the key supported so as to be rotationally movable with regard to a frame of the keyboard musical apparatus, a key actuating apparatus (1) includes: a plunger (15) which is moved on an arc or curved line in correspondence with a rotational motion of a key (3); and a solenoid (7) including electro magnets (17and19) which are fixed to the frame and which are substantially in a cylindrical shape into which the plunger is inserted. The plunger (15) is formed in an arc or curved shape extended in a direction of a rotational motion of the plunger (15). A head end (15b) arranged on the plunger (15) in a lengthwise direction is made from a magnetic body.

REFERENCES:
patent: 4319211 (1982-03-01), Ueda et al.
patent: 5210367 (1993-05-01), Taguchi et al.
patent: 5650580 (1997-07-01), Yamamoto et al.
patent: 5922983 (1999-07-01), Muramatsu
patent: 6121535 (2000-09-01), Muramatsu
patent: 5011765 (1993-01-01), None
patent: 2002343630 (2002-11-01), None

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