Toothbrush

FIG. 1 is a right front perspective view of a toothbrush according to an embodiment of the new design;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dashed lines shown in the drawings illustrate environmental structure that form no part of the claimed design. The dash-dot-dashed lines directly adjacent to the claimed areas are included to represent the boundaries of the claimed design and form no part of the claimed design.