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US 12,315,474 B2Granted
Keyboard instrument
AssigneeCasio Computer Co., Ltd.
InventorsKenzo Ichikawa, Takahiro Mizushina, Wataru Nimura
Life of this patent
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Abstract
A keyboard instrument has a first member having a first fixation fulcrum, a first link rotatably fixed to the first fixation fulcrum at one end side thereof, a second member having a second fixation fulcrum provided further forwards and downwards than the first fixation fulcrum, a second link rotatably fixed to the second fixation fulcrum at one end side thereof, and a coupling link fixed to a key so as to couple the other end side of the first link and the other end side of the second link together.
Claims8
A keyboard instrument comprising:
- a first member comprising a first fixation fulcrum;
- a first link pivotally supported on the first fixation fulcrum at a first end side of the first link;
- a second member comprising a second fixation fulcrum provided further forwards and downwards than the first fixation fulcrum with respect to a front-back direction and an upper-lower direction of the keyboard instrument;
- a second link pivotally supported on the second fixation fulcrum at a first end side of the second link;
- and
- a coupling link configured to fix a second end side of the first link which is configured to rotate about the first fixation fulcrum in response to a key operation and a second end side of the second link which is configured to rotate about the second fixation fulcrum in response to the key operation so that a distance stays unchanged, the distance being a distance defined between the second end side of the first link and the second end side of the second link.
3 more elements
Dependencies are inferred from the claim text.