| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piano back check which can lock a hammer which performs return rotation and whose manufacturing cost can be reduced. <P>SOLUTION: This piano bach check is configured so as to prevent the rebound of a hammer 3 by locking the hammer 3 which performs the return rotation after hitting a string. The back check is equipped with a back check body 31 which is provided at an engaging part with the hammer 3 and has a sticking face 31d which extends in the vertical direction and whose center part in the vertical direction is raised, an under felt 32 which is stuck to the sticking face 31d of the back check body 31 and a sheet shaped cushioning material 33 which is stuck to the back check body 31 so as to cover the under felt 32 and which is formed to have an engaging face 33a of the shape of a predetermined curved surface for locking the hammer 3 by the sticking face 31d. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
