A support assembly includes a support rotatable along a first surface with respect to a support rail, a repetition lever rotatable on the support, and a jack rotatable on the support and disposed to at least partially overlaps the repetition lever. The repetition lever includes a first contact portion which makes contact with a regulating portion which regulates rotation, the jack includes a second contact portion which makes contact with the regulating portion which regulates rotation, and the repetition lever and the jack are provided so that the first contact portion and the second contact portion overlap each other.

A support assembly includes a support rotatable along a first surface with respect to a support rail, a repetition lever rotatable on the support, and a jack rotatable on the support and disposed to at least partially overlaps the repetition lever. The repetition lever includes a first contact portion which makes contact with a regulating portion which regulates rotation, the jack includes a second contact portion which makes contact with the regulating portion which regulates rotation, and the repetition lever and the jack are provided so that the first contact portion and the second contact portion overlap each other.

A support assembly includes a support rotatable along a first surface with respect to a support rail, a repetition lever rotatable on the support, and a jack rotatable on the support and disposed to at least partially overlaps the repetition lever. The repetition lever includes a first contact portion which makes contact with a regulating portion which regulates rotation, the jack includes a second contact portion which makes contact with the regulating portion which regulates rotation, and the repetition lever and the jack are provided so that the first contact portion and the second contact portion overlap each other.

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.

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.