Armchair

FIG. 1 is a front, right and top perspective view of an armchair, showing my new design;

FIG. 2 is a rear, left and bottom 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;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front, right and top perspective of the armchair, shown in a state of use; and,

FIG. 10 is a rear, left and bottom perspective view thereof.

The broken lines in the figures depict portions of the armchair that form no part of the claimed design.