The ornamental design for a lockingcage for a portable music player, as shown and described.
FIG. 1 is a perspective view of a locking cage for a portable music player, showing my new design.
FIG. 2 is a front elevation view thereof.
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a right side elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a bottom view thereof.
FIG. 7 is a top plan view thereof; and,
FIG. 8 is an inverted front elevation view thereof, shown in a rotated position of use suspended from a padlock and belt loop, wherein a portable music player lock is shown in phantom lines inserted within; and wherein the padlock, belt and belt loop are also shown in phantom lines.
The portable music player, pad lock, belt, belt loop, and directional arrows shown in phantom lines are shown for environmental purposes only, and form no part of the claimed design.