The ornamental design for an armrest, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. The color shown on the claimed design forms no part thereof.
FIG. 1 is a perspective view of an armrest showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view thereof showing the light emitting element in lighted condition.
The broken lines radiating from the light emitting elements in FIG. 8 represent beams of light and form no part of the claimed design.