Strap buckle

FIG. 1 is a perspective view of a strap buckle showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view showing one of the examples of the use of my design.

The broken line showing of the straps in FIG. 8 is for illustrative purposes only and forms no part of the claimed design.