US 12,223,934 B2
Keyboard device for keyboard instrument
Tsutomu Yamaguchi, Hamamatsu (JP)
Assigned to KABUSHIKI KAISHA KAWAI GAKKI SEISAKUSHO, Hamamatsu (JP)
Filed by KABUSHIKI KAISHA KAWAI GAKKI SEISAKUSHO, Hamamatsu (JP)
Filed on Mar. 24, 2022, as Appl. No. 17/656,399.
Claims priority of application No. 2021-54603 (JP), filed on Mar. 29, 2021; application No. 2021-54604 (JP), filed on Mar. 29, 2021; application No. 2021-54605 (JP), filed on Mar. 29, 2021; and application No. 2021-54606 (JP), filed on Mar. 29, 2021.
Prior Publication US 2022/0310050 A1, Sep. 29, 2022
Int. Cl. G10H 1/34 (2006.01); G10C 3/12 (2006.01)
CPC G10H 1/344 (2013.01) [G10C 3/12 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A keyboard device for a keyboard instrument, comprising:
a keyboard chassis;
a plurality of keys provided on the keyboard chassis and each extending a predetermined length in a front-rear direction, the keys being arranged in a state arranged side by side in a left-right direction; and
a plurality of key support mechanisms each provided in a state engaged with the keyboard chassis and arranged side by side in the left-right direction, each for supporting an associated one of the keys from below,
wherein the key support mechanisms each include an arm configured to extend in the front-rear direction and swingably engaged with a pivot shaft provided on the keyboard chassis, the arm being pivotally connected to a key-side connecting portion formed on a predetermined portion of an associated one of the keys via an arm-side connecting portion formed on an end of the arm,
wherein the key-side connecting portion includes:
a plate-like connecting body portion hanging downward from the key and having a predetermined thickness in the left-right direction, and
a pair of engagement protrusions coaxially protruding to the left and the right from the connecting body portion, respectively,
wherein the arm-side connecting portion includes:
two connecting arm portions formed in a bifurcated shape extending a predetermined length along a longitudinal direction of the arm, the connecting arm portions being capable of sandwiching the connecting body portion from the left and the right, and
fitting portions provided on the respective connecting arm portions and having associated ones of the engagement protrusions pivotally fitted therein.