Sofa Bed

FIG. 1 is a front, top, left side perspective view of a sofa bed showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view thereof;

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

FIG. 8 is a perspective view illustrating the sofa bed in a bed configuration.

The broken lines in the drawings depict portions of the sofa bed that form no part of the claimed design.