I claim, the ornamental design for a portable securing syringe device, as shown and described.
FIG. 1 is a perspective view of a portable securing syringe device showing my design.
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is another perspective view shown in a position of use.
The broken lines in the drawings illustrate portions of the environment of the portable securing syringe device and form no part of the claimed design.