The ornamental design for a cigaretteextinguishingdevice for key ring, as shown and described.
FIG. 1 is a perspective view of a cigarette extinguishing device for key ring showing my new design;
FIG. 2 is another perspective view of a cigarette extinguishing device for key ring;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a left side view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
In the drawings, the broken lines are for the purpose of illustrating portions of the cigarette extinguishing device for key ring and form no part of the claimed design.