立式钢琴琴键的按弹动力是运用杠杆原理传导的。通过卡钉,由顶杆头推顶中古(转击器)根部,使得弦槌向前运动,利用冲力敲击琴弦。弦槌应调得在离弦面2毫米左右时能自行恢复到原有的斜度,这样就具备了往复不断地运动的条件。为达到这一目的,须调节索吊螺丝的高度,至于顶杆头部的高度则通过卡钉的高低来调整。近年来生产的钢琴中,多见弦槌柄悬离靠背档毡的情况。亦即在弦槌返回静止时顶杆头部先于靠背档承受缓冲力,使得在弦槌停下后 Vertical piano keys by the elastic force is the use of lever principle of conduction. Through the staple, push the crown from the club head (hammer) root, making the hammer move forward, tapping the strings with momentum. The hammer should be adjusted to about 2 millimeters away from the original surface when the slope can be restored, so that has the conditions of reciprocating movement. To achieve this purpose, the height of the cable hanger must be adjusted, and the height of the ejector head is adjusted by the height of the staple. In recent years the piano produced, see the hammer handle hanging from the back of the file. That is, when the hammer returns to standstill, the head of the jack bears cushioning force before the backrest, so that after the hammer is stopped