| 摘要 |
PROBLEM TO BE SOLVED: To provide a keyboard device of an electronic keyboard instrument, capable of flexibly coping with changes of a length of a key and a fulcrum position of oscillation or the like, improving the degree of freedom of design, and by holding a key frame center in a stable state, maintaining uniformity of heights of a plurality of keys supported by it and excellent touch feelings.SOLUTION: The keyboard device of an electronic keyboard instrument includes: a shelf plate 8; a keyboard chassis 3 which has a front rail 11, a middle rail 12 and a rear rail 13 all extending in a longitudinal direction and a plurality of ribs 14 connecting them, and for which the front rail 11 and the rear rail 13 are mounted on the shelf plate 8 and the middle rail 12 is connected to them in the state of being mounted on the plurality of ribs 14; a key frame center 23 attached in the state of being mounted on the middle rail 12; and a plurality of keys 2 which extend in a cross direction respectively, are engaged with balance pins 24 through balance pin holes 27, and are freely swingably supported by the key frame center 23 with the balance pins 24 as a fulcrum. |
