LENGTH ADJUSTMENT MECHANISM FOR A POLE

摘要

A mechanism including a ramp member (3) with first and second tapered walls (13, 14); first and second plurality of balls (4, 18) arranged to frictionally engage between outer tube (1) and ramp member (3) in an engaged position. A release mechanism having a release member (10) located between the first and second plurality of balls; a control collar (16) connected to the release member. Movement of the control collar in a first direction causes the release member to contact the first balls and moves the balls into a first disengaged position, allowing movement of the inner tube in said first direction, but not in a second direction opposite the first direction; movement of the control collar in the second direction similarly allows movement of the inner tube in the second direction, but not in the first direction.