| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a keyboard apparatus capable of smoothly and safely folding and unfolding a keyboard case separated into a plurality of parts. <P>SOLUTION: The keyboard apparatus is provided with: first and second keyboard cases 1 and 2 in which first and second keyboard parts 3 and 4 are provided; a connection hinge part 5 for rotatably connecting respective upper surfaces of end parts 6 and 7 of the first and second keyboard cases 1 and 2 with each other at a position located in the rear of the first and second keyboard parts 3 and 4; and an auxiliary hinge part 9 for rotatably connecting respective front faces of the end parts 6 and 7 of the first and second keyboard cases 1 and 2 with each other and allowing a rotation connecting member 28 to be folded and erected in the position corresponding to the connection hinge part 5. Then, when the rotation connecting member 28 of the auxiliary hinge part 9 is erected and corresponded to the connection hinge part 5, the first and second keyboard cases 1 and 2 can be rotated in stable condition by the connection hinge part 5 and the auxiliary hinge part 9, and when the first and second keyboard cases 1 and 2 are unfolded in a continuous condition to play, the auxiliary hinge part 9 can be folded in the position not to interfere with performance. <P>COPYRIGHT: (C)2008,JPO&INPIT |
