FIG. 1 is a perspective top view of a collapsible support device according to a first embodiment of our new design, in a closed position;
FIG. 2 is a top view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 3 is a perspective bottom view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 4 is a left view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 5 is a right view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 6 is a rear view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 7 is a front view of the collapsible support device shown in FIG. 1, in a closed position;
FIG. 8 is a front, left perspective view of the collapsible support device shown in FIG. 1, in an open position;
FIG. 9 is a rear, left perspective view of the collapsible support device shown in FIG. 1, in an open position;
FIG. 10 is a front, right perspective view of the collapsible support device shown in FIG. 1, in an open position;
FIG. 11 is a rear, right perspective view of the collapsible support device shown in FIG. 1, in an open position;
FIG. 12 is a perspective top view of a collapsible support device according to a second embodiment of our new design, in a closed position;
FIG. 13 is a top view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 14 is a perspective bottom view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 15 is a left view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 16 is a right view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 17 is a rear view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 18 is a front view of the collapsible support device shown in FIG. 12, in a closed position;
FIG. 19 is a front, left perspective view of the collapsible support device shown in FIG. 12, in an open position;
FIG. 20 is a rear, left perspective view of the collapsible support device shown in FIG. 12, in an open position;
FIG. 21 is a front, right perspective view of the collapsible support device shown in FIG. 12, in an open position; and,
FIG. 22 is a rear, right perspective view of the collapsible support device shown in FIG. 12, in an open position.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.