Keyboard musical instrument equipped with hammer shank stopper where hammer assembly rebounds without deflection of shank

摘要

An acoustic upright piano (10), an electronic sound system (20) and a hammer stopper (31) form in combination a keyboard musical instrument for generating acoustic sounds in an acoustic sound mode and electronic sounds in an electronic sound mode, and the hammer stopper (31) has a rotatable shaft (31a) extending in a lower space under damper blocks of damper assemblies, cushion members (31c) projecting into an upper space over the damper blocks and connecting brackets (31b) provided between the rotatable shaft (31a) and the cushion members (31c), thereby perfectly interrupting hammer (17) motions before an impact on strings (13) in the electronic sound mode.