Keyboard device for electronic keyboard instrument

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8766076
APP PUB NO 20110179935A1
SERIAL NO

13004581

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A keyboard device for an electronic keyboard instrument, capable of ensuring stable contact between movable contacts and fixed contacts of a switch body, to accurately detect key depression information. A hammer has a pressure-applying surface formed in a predetermined configuration. A key switch detects key depression information and includes a substrate with fixed contacts, a hollow switch body with a pressure-receiving surface, and movable contacts provided inside the body. Pressing of the pressure-receiving surface by the pressure-applying surface sequentially brings the movable contacts into contact with the fixed contacts, causing switch body compressive deformation. The pressure-receiving surface and pressure-applying surface are complementary in shape, and an orientation of the former conforms to an orientation of the latter when hammer pivotal motion is terminated after the movable contacts are brought into contact with the fixed contacts.

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Patent Owner(s)

Patent OwnerAddress
KABUSHIKI KAISHA KAWAI GAKKI SEISAKUSHOHAMAMATSU-SHI SHIZUOKA 430-8665

International Classification(s)

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  • 2011 Application Filing Year
  • G10H Class
  • 211 Applications Filed
  • 173 Patents Issued To-Date
  • 82 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2011201220132014201520162017201820190255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishida, Hideyuki Hamamatsu, JP 19 237

Cited Art Landscape

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Patent Citation Ranking

  • 5 Citation Count
  • G10H Class
  • 6.12 % this patent is cited more than
  • 11 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges99028931131201 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7091 - 100100 +05101520253035404550556065707580859095

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11.5 Year Payment $7400.00 $3700.00 $1850.00 Jan 1, 2026