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钢琴踏瓣在艺术表现上具有重要的地位。它的应用使钢琴的演奏达到了更完美的境界,故有人说“踏瓣是钢琴的灵魂”。现代的立式钢琴一般都装有2或3个踏瓣(三角钢琴多为2个,其作用与立式钢琴相似)。立式钢琴的踏瓣安装在琴体的下部,过渡杠杆和支棒为机械传动部件。踩下右踏瓣时,支棒向上顶起击弦机止音档,使止音器脱离琴弦,引起全部弦的共振而增音。踩下左踏瓣时,支棒通过过渡板孔后推动击弦机弦槌枕档向弦的方向移动,缩短了弦槌的行程,减小弦槌的击弦力而弱音。踩下中踏瓣时,装在击弦机上前方的长毡条下落而处于弦槌与琴弦之间,使奏出的声音音量减弱。踏瓣动作的复原是靠过渡杠杆下的弹簧来实现的。
Piano pedals play an important role in the art performance. Its application makes the performance of the piano achieve a more perfect state, so some people say that “pedal flap is the soul of the piano.” Modern upright pianos are generally equipped with 2 or 3 pedals (more than two grand pianos, its role and upright piano similar). Upright piano pedals installed in the lower part of the body, the transition lever and stick for the mechanical transmission components. When depressing the right pedal, the stick lifts the stop gear upwards to disengage the silencer from the strings, causing resonance of all the strings and increasing the sound. When depressing the left pedal, the stick moves through the transition plate hole to push the hammer of the striking machine to move in the direction of the chord, shortening the stroke of the hammer and reducing the striking force of the hammer and weak sound. When the middle pedal is depressed, the long batt attached to the front of the impact machine falls between the hammer and the string, weakening the volume of the sound being played. Restoration pedal action is based on the lever under the lever to achieve the spring.