The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2014
Filed:
Feb. 15, 2013
Yamaha Corporation, Hamamatsu, JP;
Ichiro Osuga, Hamamatsu, JP;
Kenichi Nishida, Hamamatsu, JP;
Shunsuke Ichiki, Hamamatsu, JP;
Hiroshi Harimoto, Hamamatsu, JP;
Shin Yamamoto, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A keyboard device includes plural white and black keysthat rock according to a key depression/release operation. Positions of key support portionssupporting the plural white and black keysin the longitudinal direction are set to be different from one another. The keyboard device also includes hammersthat rock with the rocking movement of the plural white and black keys. The plural white and black keysinclude drive unitsthat drive the hammers. The pivot centers of the hammers are located on the same straight line extending in the lateral direction. The drive unitis located anterior to the drive unit. An upper-limit stopperand a lower-limit stopper, which restrict the rocking movement of the hammers, are provided to extend in the lateral direction.