FIG. 1 is a perspective view of a toothbrush according to the present invention;

FIG. 2 is a front view of the toothbrush of FIG. 1;

FIG. 3 is a right side view of the toothbrush of FIG. 1;

FIG. 4 is an enlarged perspective view of a portion of the toothbrush of FIG. 1;

FIG. 5 is a right side view of the portion of the toothbrush of FIG. 4;

FIG. 6 is a left side view of the portion of the toothbrush of FIG. 4; and,

FIG. 7 is a top view of the portion of the toothbrush of FIG. 4.

The broken line portions within the above listed drawings are illustrative of the environmental structure of the toothbrush and form part of the claimed design.