22 in a desired rotational position with respect to the housing alternatively a friction brake not shown could be used to secure the handle support 22 in the desired position preferably however the support retainer 24 includes a cam latching mechanism in the form of a detent 50 which interfits into an aligned one of the annular ring indentions 32 as can best be seen in fig3 a the detent 50 is biased toward engaged positions the biasing of the detent 50 toward engaged positions may result from the resiliency of a material the detent is comprised of for example polypropylene or another resilient plastic or vinyl material alternately and preferably a spring not shown is operably interposed between the detent and a surface of the support retainer to provide the desired engagement biasing to rotate the handle support 22 with respect to the housing 12 the user holds the housing with one hand and grasps the handle 26 with the other hand and relatively rotates them two handle positions one being in phantom are shown in fig4 when a sufficient force is applied to the handle 26 the attached annular ring 30 will rotate with respect to the housing 12 and the support retainer 24 the detent 50 affixed to the support retainer 24 remains rotatively stationary and functions as a cam follower as it bears against and follows the rotating annular ring surface as shown in phantom in fig3 a the detent 50 will be displaced from its indentation engaged position when a ridge 33 separating adjacent indentations 32 cams the detent the detent 50 will ride lip one face of the ridge and.