Piano including drop action
AssigneeKabushiki Kaisha Kawai Gakki Seisakusho
InventorMitsuo Yamashita
Life of this patent
Estimating the term…
Abstract
A piano including a drop action is provided with an upper first key pivotally movable and a lower second key pivotally supported by a support member and having a front end contacted by the first key. In accordance with depression of the first key, the second key pivotally moves to lift up a wippen of the action via a connection member (wire member), whereby a string is struck by a hammer. The support member has a plurality of support walls formed with bearing grooves which extend obliquely with respect to a vertical direction. The second key includes a pair of shafts protruding toward opposite lateral sides and is pivotally supported by the support member in a state in which the shafts are engaged with bottoms of the bearing grooves formed in each adjacent two support walls.
Claims4
A piano including a drop action, comprising:
- a first key extending in a front-rear direction and having a rear end thereof pivotally supported, for being operated by a player;
- a second key disposed below the first key and having a central portion thereof pivotally supported by a support member, for having a front end thereof contacted by the first key;
- an action including a wippen disposed below the second key, the wippen pivotally moving upward to drive a hammer and thereby cause the hammer to strike a string;
- and
- a connection member connected to a rear end of the second key and the wippen, for lifting up the wippen in accordance with upward pivotal movement of the rear end of the second key in accordance with depression of the first key,
- wherein the support member includes a plurality of support walls extending in a vertical direction and arranged side by side in a left-right direction, each of the plurality of support walls being formed with a bearing groove extending obliquely with respect to the vertical direction, the bearing groove being open upward and closed downward, there being defined a key guide groove between each adjacent two of the support walls, and
- wherein the second key has a pair of pin-shaped shafts protruding toward opposite lateral sides from the central portion thereof and is accommodated in an associated one of the key guide grooves, the second key being pivotally supported by the support member in a state in which the shafts are engaged with bottoms of the respective bearing grooves formed in the adjacent two support walls.
Dependencies are inferred from the claim text.