Patent ID: 6147290
Filing Date: 2000-11-14
Classification: G10C,G10H

Abstract:
An electronic musical instrument keyboard apparatus having a key, wherein the key includes a depressing action and a releasing action comprising:a first swingable member that is established so that it can freely swing in accordance with the depressing action of the key;a first biasing means that applies a bias to the first swingable member and applies a first counter force to the key that resists the depressing action;a second swingable member that is established so that it cannot swing with respect to the first swingable member during the depressing action of the key and, together with this, is established so that it is free to swing with respect to the first swingable member during the releasing action of the key;a second biasing means that applies a bias to the second swingable member and applies a second counter force to the key that resists the releasing action and is smaller than the first counter force;wherein in accordance with the depressing action of the key, in a portion of the depressing process for the key, the first swingable member and second swingable member swing as a unit against the biasing due to the first biasing means; andwherein in accordance with the releasing action of the key, in a portion of the releasing process for the key, the second swingable member swings independently against the biasing due to the second biasing means.