BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary section view showing the internal construction of a body of a keyboard instrument as a musical instrument according to an embodiment of the present invention in a state where a fallboard of a fallboard unit is closed;
FIG. 2 is a fragmentary section view showing the internal construction of the body of the keyboard instrument according to the embodiment in a state where the fallboard unit is in the course of being opened;
FIG. 3 is a fragmentary section view showing the internal construction of the body of the keyboard instrument according to the embodiment in a state where the fallboard unit is open; and
FIG. 4 is a schematic fragmentary section view showing the internal construction of a body of a musical instrument according to a modification of the embodiment.