Patent ID: 9406284
Filing Date: 2016-08-02
CPC Classification: G10C

Claim Text:
1. A keyboard device, comprising: a plurality of key units each comprising a plurality of keys, a plurality of hinges, a common mounting portion which are molded in one piece, a plurality of the common mounting portions of the plurality of key units being superposed on each other and secured to a key frame, wherein the plurality of keys are arranged in a right and left direction and each extends in a front and rear direction, wherein the common mounting portion is elongated in the right and left direction, wherein each of the plurality of hinges is provided between the common mounting portion and a rear end of a corresponding one of the plurality of keys and has a planar plate shape in which a plate surface of each of the plurality of hinges is substantially horizontal, wherein the plurality of key units comprise a particular key unit comprising an uppermost common mounting portion of the plurality of the common mounting portions, wherein each of at least one of the plurality of hinges of the particular key unit comprises: wherein a protrusion protruding outward is provided on at least one of opposite outer ends of the hinge thick portion in the right and left direction.