Key weight adjuster for grand, upright and digital piano

摘要

this design is large, an optical and digital piano keyboard, the control device in a certain elasticity, the central action, and a ball (2) is the one of the leaf spring (1) in two kind of fixed area (3, 3 ') of the the keyboard (10) in the shape of arc. so, fixed, in the middle of the leaf spring (1) of the act of a ball (2), a keyboard (10) on the bottom surface of the nut (4), with the option of the spiral screw (5) in the form of the lower end projection (6) on the other, the action; the nut (4) together with a spiral screw (5) l so, the leaf spring (1) of the half power control, a keyboard (10) of the weight so as to adjust the characteristic.