US 10,762,884 B2 · Keyboard device for electronic keyboard instrument and keyframe front for keyboard instrument

Abstract

A keyboard device for an electronic keyboard instrument, capable of suppressing bouncing of a hammer returning to its original position. A key extends in a front-rear direction swingably about a balance rail pin. The hammer is formed vertically pivotally movable between initial and pivotally-moved positions about a hammer fulcrum provided near a rear end of the key and is placed on the key via a key contact portion in contact with a rear end of upper surface of the key from above, for pivotal motion by swinging of the key. A hammer cushion is provided on upper surface of the key at a predetermined location forward of the key contact portion to suppress bouncing of the hammer by contact with a cushion contact portion of the hammer returning from the pivotally-moved position to the initial position by releasing the key depression.

Claims14

Dependent claims

A keyboard device for an electronic keyboard instrument, comprising:

a key extending in a front-rear direction and configured to be swingable about a key fulcrum located at about a center of the key in a longitudinal direction thereof;
a hammer extending in the front-rear direction and configured to be pivotally movable in a vertical direction between an initial position and a pivotally-moved position about a hammer fulcrum provided at about a rear end of the key, the hammer being placed on the key via a first contact portion brought into contact with a rear end of an upper surface of the key from above, for being pivotally moved in accordance with swinging of the key;
and
a hammer bounce-suppressing member provided on one of the upper surface of the key and a lower surface of the hammer at a predetermined position forward of the first contact portion and configured to suppress bouncing of the hammer by being brought into contact with the other of the upper surface of the key and the lower surface of the hammer when the hammer returns from the pivotally-moved position to the initial position in accordance with release of the key depressed.

1 more element

A keyboard device for an electronic keyboard instrument, including:

a key extending in a front-rear direction and configured to be swingable about a key fulcrum located at about a center of the key in a longitudinal direction thereof, and
a hammer extending in the front-rear direction and having a rear end thereof supported such that the hammer is pivotally movable in a vertical direction about a hammer fulcrum provided at about a rear end of the key, the hammer being placed on a rear end of an upper surface of the key, for being pivotally moved in accordance with swinging of the key,
wherein the hammer comprises:
a hammer body extending in the front-rear direction and having a rear end thereof pivotally movable about the hammer fulcrum;
and
a key contact portion provided such that the key contact portion protrudes downward from a rear end of a lower surface of the hammer body and configured to be brought into contact with the rear end of the upper surface of the key from above, and
wherein the key contact portion is configured such that during pivotal motion of the hammer, a distance between a contact portion thereof in contact with the upper surface of the key and the hammer fulcrum is approximately constant.

4 more elements

Dependencies are inferred from the claim text.

Keyboard device for electronic keyboard instrument and keyframe front for keyboard instrument

Life of this patent

Keyboard device for electronic keyboard instrument and keyframe front for keyboard instrument

Life of this patent

Abstract

Claims14