Neck Fan

FIG. 1 is a bottom, rear, and left side perspective view of a neck fan according to my new design; FIG. 2 is a top, front, and right side perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a left side view thereof; FIG. 6 is a right side view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; FIG. 9 is an enlarged view of area 9 circumscribed in FIG. 4 ; FIG. 10 is an enlarged view of area 10 circumscribed in FIG. 4 ; FIG. 11 is an enlarged view of area 11 circumscribed in FIG. 8 ; and, FIG. 12 is an enlarged view of area 12 circumscribed in FIG. 8 . The broken lines consisting of evenly spaced dash lines in the drawings depict portions of the neck fan that form no part of the claimed design. The broken lines consisting of short and long dash lines encircling the enlarged detail views are for annotative purposes that form no part of the claimed design.