BRIEF DESCRIPTION OF THE DRAWINGS
For better understanding of the objects and other features of the present invention, its preferred embodiments will be described hereinbelow in greater detail with reference to the accompanying drawings, in which:
FIG. 1 is an exploded perspective view showing relevant sections of a sliding volume control device according to a first embodiment of the present invention;
FIG. 2 is a view of the sliding volume control device taken along the A-A line of FIG. 1;
FIG. 3 is a view of the sliding volume control device taken in a direction of arrow B of FIG. 1;
FIG. 4 is a view explanatory of behavior of a top plate portion of a cover employed in the first embodiment of the present invention;
FIG. 5 is a view explanatory of behavior of recessed and projecting portions in the first embodiment of the present invention;
FIG. 6 is an exploded perspective view showing relevant sections of a sliding volume control device according to a second embodiment of the present invention;
FIG. 7 is an enlarged perspective showing one end portion of the sliding volume control device shown in FIG. 6;
FIG. 8A is a view showing another example of a crank portion employed in each of the embodiments; and
FIG. 8B is a view showing still another example of a crank portion employed in each of the embodiments.