The invention relates to the technical field of instruments, in particular to a piano keyboard automatic playing device, especially the device automatically play by electromagnet drive piano keys, which is characterized in that the vertical frame solenoid serrated distribution are respectively connected to the mounting plate arranged perpendicular to the front and the back, the top rod of each frame electromagnet through the piano in the independent position of the top rod hole, inserting buffer cap in board above the waist, groove mounting plate is arranged on the upper part of a line through a plurality of screws intermittent switching angle are respectively connected to the mounting plate of the front and the back, waist slot line spacing is arranged between the upper and lower intermittent installation plate. The frame, electromagnet are respectively connected to the front and rear mounting plate through screws. Compared with the prior art, novel design, firm structure, reliable use and convenient manufacture, little impact on the structure of the piano, the piano in the plate without damage, and low cost, simple production and installation, strong versatility, power headroom electromagnet, easy to heat.
【技术实现步骤摘要】
本专利技术涉及
为乐器类，具体说涉及一种钢琴琴键自动演奏装置，特别是通过电磁铁驱动钢琴琴键自动弹奏的装置。
技术介绍
钢琴是一种昂贵、精密的声学仪器，稳定性和恒温恒湿要求高，键盘一般由88个 琴键组成，单个琴键中部存在一个定位支点，当人手弹奏琴键前端时，琴键的尾端被翘起。 由单片机构成的控制电路驱动电磁铁铁芯向上运动时，顶起琴键尾端，琴键的前端向下运 动，则琴键模拟了手指弹奏时的动作，具有这种功能的钢琴通常称为自动演奏钢琴。由于钢 琴键盘琴键排列密集，限制了电磁铁的外形尺寸，而体积小的电磁铁功率低、力度弱。因此， 电磁铁的选用直接关系到自动演奏的声学效果和实用性。 目前自动演奏钢琴中电磁铁的安装方式可以归纳为三类一类为单列式，另二类 为垂直双列式和平面双列式。单列式排列结构简单，但电磁铁的宽度不得大于琴键尾部宽 度(缝隙)，体积受到限制，铁芯太小，为增强功率，用特殊强磁材料方案制成的成本高，而 且排列成一行的钢琴中板顶杆孔密度高，造成中板变形，甚至断裂的隐患。垂直双列式将 电磁铁的安装布局成上下两列，提高了电磁铁体积，功率增强，缺点是上下列电磁铁顶杆长 ...
【技术保护点】
一种钢琴自动演奏琴键驱动装置，包括缓冲帽、顶杆、框架电磁铁、安装板、转接角、钢琴琴键和电路板，转接角并且连接钢琴中板的下面，其特征是：垂直的框架电磁铁锯齿状分布排列分别连接在垂直的安装板前、后面，每个框架电磁铁的顶杆穿过钢琴中板相互独立的顶杆孔，在中板上面的顶端部位插接缓冲帽，安装板上部设有一行断续的腰形槽穿过螺钉将多个转接角分别连接在安装板的前、后面，安装板的上部和下部之间设有几行等间距断续的腰形槽，穿过螺钉将框架电磁铁分别连接在安装板的前、后面。
【技术特征摘要】
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