The ornamental design for an electronic flashdevice, as shown and described.
FIG. 1 is a front perspective view of an electronic flash device showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is an enlarged view of FIG. 1;
FIG. 5 is an enlarged view of FIG. 2;
FIG. 6 is an enlarged view of FIG. 3; and,
FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 5 with the internal structure simplified.
The features shown in broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. The dot-dashed lines define the boundaries of the claimed design and form no part thereof.