Kabushiki Kaisha Kawai Gakki Seisakusho

Mikhail Vasilievich Pletnev

Yasushi Terai

Hideyuki Ishida

Hanayo Tsuzuku

Anton Anatolievich Nikitin

A touch weight adjustment mechanism for a keyboard device, which is capable of adjusting a touch weight of a key easily and appropriately by using a coil spring and changing the urging force of the spring. An adjustment spring is formed by a coil spring for causing a tensile force thereof to act on the key, thereby increasing the touch weight of the key. An adjustment shaft is formed in a rod shape and is movable in a lengthwise direction by being operated for rotation. A rotary connection member connects between one end of the adjustment spring and one end of the adjustment shaft, which are closest to each other, and a spring-side connecting portion thereof connected to the adjustment spring and a shaft-side connecting portion thereof connected to the adjustment shaft are rotatable relative to each other.

Touch weight adjustment mechanism for keyboard device

A keyboard device having keys enabling sufficient weight of touch to be obtained in spite of being configured to be shorter in length than those of the grand piano and. Link mechanisms are each provided on a base for supporting an associated one of the keys from below and configured to cause the associated key to operate such that when a front end of the key is depressed, an amount of downward movement of a rear end of the key becomes approximately half of an amount of downward movement of the front end of the key. Each link mechanism includes front-side and rear-side key link bars and front-side and rear-side connecting link bars. The front-side and rear-side connecting link bars are pivotally supported, respectively, and are pivotally and slidably connected to each other via respective rear and front ends thereof.

Growing community of inventors

Basel, Switzerland

Mikhail Vasilievich Pletnev