The ornamental design for a pushingmechanism, as shown and described.
FIG. 1 is a perspective view of a pushing mechanism according to an embodiment of the present design with a spring and various fastening components shown in broken lines.
FIG. 2 is a front elevation view of the pushing mechanism of FIG. 1.
FIG. 3 is a rear elevation view of the pushing mechanism of FIG. 1.
FIG. 4 is a right side elevation view of the pushing mechanism of FIG. 1.
FIG. 5 is a left side elevation view of the pushing mechanism of FIG. 1.
FIG. 6 is a top plan view of the pushing mechanism of FIG. 1; and,
FIG. 7 is a bottom plan view of the pushing mechanism of FIG. 1.
The broken lines shown in FIGS. 1 through 7 illustrate portions of the pushing mechanism that form no part of the claimed design.