| 摘要 |
<p>PURPOSE: To provide an action sample of grand piano capable of easily explaining the operation when the soft pedal of grand piano is trodden on. CONSTITUTION: The action sample 1 of grand piano is composed of a supporting base 2, a keyframe 3, a keyboard 4, cheekblocks 5a, 5b, a bracket 6, an action mechanism 7 and a perpendicular plate 9 having a string 91. Broth right and left flanks of the keyframe 3 are respectively projectingly provided with pins 39a, 39b. The cheekblocks 5a, 5b are respectively erected on both the right and left sides of the keyframe 3 on the front surface of the supporting base 2 and are provided with guide holes 51a, 51b capable of sliding the pins 39a, 39b in the lateral direction. The bracket 6 is fixed atop the keyframe 3 via a bracket base 61 and has the action mechanism 7. The position of hammer felt 72a of a hammer 72 with respect to the string 91 changes when the keyframe 3 is moved rightward by applying external force thereon.</p> |
