Regulating button mechanism for easily regulating escape timing, silent system cooperative therewith and keyboard musical instrument equipped therewith

摘要

A silent piano includes a hammer stopper (71) changed between a free position out of the trajectories of hammer shanks (25b) and a blocking position on the trajectories for blocking strings (30) from being struck with the hammers (25) and a tandem regulating button mechanism (27) having standard regulating buttons (27b) and regulating bars (27c) used together with the hammer stopper (71) changed in the blocking position for changing escaping speed of jacks (20g), and an adjusting mechanism (27e) is provided between the regulating bars (27c) and a shaft (28a) for adjusting the regulating bars (27c) to appropriate angular positions, wherein the adjusting mechanism (27e) has regulating screws (27f) projecting from stationary brackets (29a) fixed to the shaft (28a) into a free space created in front of the array of action mechanisms (20) so that a tuner easily adjusts the regulating bars (27c) to the appropriate angular positions without removing the action mechanisms (20) from on the key bed.