The ornamental design for a buckleassembly, as shown and described.
FIG. 1 is a perspective view of a buckle assembly that incorporates the new design;
FIG. 2 is a front view of the buckle assembly;
FIG. 3 is a rear view of the buckle assembly;
FIG. 4 is a left-side view of the buckle assembly;
FIG. 5 is a right-side view of the buckle assembly;
FIG. 6 is a top view of the buckle assembly;
FIG. 7 is a bottom view of the buckle assembly;
FIG. 8 is an exploded view of the buckle assembly in use, showing how the buckle assembly is connected with straps of a seat, such as the seat of a stroller; and,
FIG. 9 is another exploded view of the buckle assembly in use, showing how the buckle assembly is connected with straps of a seat, such as the seat of a stroller.
It being understood that the broken lines are for illustrative purposes only and form no part of the claimed design.