FIG. 1 is a perspective view of an armchair frame illustrating my new design;
FIG. 2 is a right perspective view thereof;
FIG. 3 is a left perspective view thereof;
FIG. 4 is a front perspective view thereof;
FIG. 5 is a rear view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line showing of a the fabric cover is for illustrative purposes only and forms no part of the claimed design.