Chair frame

FIG. 1 is a front, left, top perspective view of a chair frame showing my new design;

FIG. 2 is a rear, right, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a front, left, top perspective view of the chair frame illustrating the chair frame incorporated with a cushion to form a chair; and,

FIG. 10 is a rear, right, bottom perspective view of the chair frame illustrating the chair frame incorporated with a cushion to form a chair.

The broken line in the drawing illustrate environment, specifically cushions, which forms no part of the claimed design.