Telescopic power supply device

[0001]FIG. 1 is a front elevation view of a telescopic power supply device showing our new design;

[0002]FIG. 2 is a front and left perspective view thereof;

[0003]FIG. 3 is a perspective view thereof, shown in a use state;

[0004]FIG. 4 is a rear elevation view of that shown in FIG. 1;

[0005]FIG. 5 is an enlarged top plan view thereof;

[0006]FIG. 6 is an enlarged bottom plan view thereof;

[0007]FIG. 7 is a left side elevation view thereof; and,

[0008]FIG. 8 is a right side elevation view thereof.

[0009]The broken lines shown represent the portions of the telescopic power supply device that form no part of the claimed design.