Hinged walking cane

The design consists of the visual features of the HINGED WALKING CANE as shown in the figures, whether those features are features of one of shape, configuration, ornament or pattern or a combination of any of those features. The dash-dot lines forming a circle in FIGS. 1, 2, 9, and 10 form no part of the claimed design. FIG. 1 is a front perspective view of the HINGED WALKING CANE in a folded position in accordance with the present design; FIG. 2 is a rear perspective view thereof; FIG. 3 is a top plan view thereof; FIG. 4 is a bottom plan view thereof; FIG. 5 is a front elevation view thereof; FIG. 6 is a left side elevation view thereof; FIG. 7 is a rear elevation view thereof; FIG. 8 is a left side elevation view thereof; FIG. 9 is an enlarged view of the circled portion "9" in FIG. 1; and; FIG. 10 is an enlarged view of the circled portion "10" in FIG. 2.