Stopper for keyboard-based musical instruments

A stopper for a keyboard-based musical instrument with which a pivotable member comes into contact while said pivotal member pivotally moves in association with a key touch, thereby restraining the pivotal movement of said pivotable member, said stopper comprising:

• a highly rigid plate-like mass;
• a first cushion laminated on a front side of said mass, said first cushion being made of a foamed urethane;
• a second cushion laminated on a back side of said mass, said second cushion being made of the foamed urethane;
• wherein the foamed urethane of the first cushion has a lower degree of foaming than the foamed urethane of the second cushion;
• and
• a holder mounted on a back side of said second cushion and holding said second cushion;
• wherein a free end of the pivotal member comes into contact with only the stopper comprising the plate-like mass, the first cushion, and the second cushion;
• and wherein with an impact from the pivotal member on the stopper, the highly rigid plate-like mass hardly deflects such that the impact distributes over a wide area of the second cushion through the mass as the impact is transmitted and such that a displacement on a back side of the first cushion is restrained by the mass.