US 12,437,738 B2
Case and keyboard instrument
Hirokatsu Katoh, Kawasaki (JP); and Takahiro Moriya, Kokubunji (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Mar. 23, 2023, as Appl. No. 18/125,414.
Claims priority of application No. 2022-048490 (JP), filed on Mar. 24, 2022.
Prior Publication US 2023/0306939 A1, Sep. 28, 2023
Int. Cl. G10H 1/34 (2006.01)
CPC G10H 1/34 (2013.01) 15 Claims
OG exemplary drawing
 
1. An instrument case comprising:
a lower case formed from a first material and extending in a left-right direction;
a front case extending in the left-right direction;
side cases disposed on respective ends of the front case in the left-right direction; and
first and second reinforcement members:
made from a second material whose thermal expansion coefficient is smaller than a thermal expansion coefficient of the first material;
disposed adjacent to one another in the left-right direction;
fixed to respective side cases of the side cases and respective portions of the front case so as to restrict relative movements between the respective side cases and the respective portions of the front case; and
fixed to the lower case and respective non-end portions of the front case so as to allow relative movements between the first and second reinforcement members and the lower case and between the first and second reinforcement members and the respective non-end portions of the front case.