I claim the ornamental design for a toilet seat hinge, as shown and described.
FIG. 1 is a perspective view of a toilet seat hinge embodying the invention.
FIG. 2 is a top plan view of the toilet seat hinge shown in FIG. 1.
FIG. 3 is a front elevational view of the toilet seat hinge shown in FIG. 1.
FIG. 4 is a left side view of the toilet seat hinge shown in FIG. 1.
FIG. 5 is a right side view of the toilet seat hinge shown in FIG. 1; and,
FIG. 6 is a rear elevational view of the toilet seat hinge shown in FIG. 1.
The present application is directed to the shape and contour of the design illustrated in the drawings. The bottom view is not part of the claimed design. The elements shown in broken lines are for illustrative purposes only and form no part of the claimed design.