The ornamental design for a collapsiblesoftbox with folding supports and tube locks, as shown and described.
FIG. 1 is a perspective front, top and right side view of the collapsible softbox with folding supports and tube locks shown not collapsed with the folding support unfolded and the tube lock in a locked position around the folding support, the perspective front, bottom and left side view of the collapsible softbox with folding supports and tube locks being a mirror image of the perspective front, top and right side.
FIG. 2 is a perspective back, top and right side view of the collapsible softbox with folding supports and tube locks shown not collapsed with the folding supports unfolded and the tube lock in a locked position around the folding supports, the perspective back, bottom and left side view of the collapsible softbox with folding supports and tube locks being a mirror image of the perspective back, top and right side view.
FIG. 3 is a perspective back, top and right side view of the collapsible softbox with folding supports and tube locks shown collapsed with the folding supports in a folded position and the tube lock in an unlocked position, the perspective back, bottom and left side view of the collapsible softbox with folding supports and tube locks being a mirror image of the perspective back, top and right side view.
FIG. 4 is a front view of the collapsible softbox with folding supports and tube locks.
FIG. 5 is a back view of the collapsible softbox with folding supports and tube locks shown not collapsed with the folding supports unfolded and the tube lock in a locked position around the folding supports; and,
FIG. 6 is a back view of the collapsible softbox with folding supports and tube locks shown collapsed with the folding supports in a folded position and the tube lock in an unlocked position.
The broken lines in the drawings depict portions of the collapsible softbox with folding supports and tube locks that form no part of the claimed design.