#$%^&*AU2015201842A120150430.pdf#####Abstract A locking mechanism (117) for locking to internal or external locking grooves of a circular bore comprises a main body (118") with locking members (119") arranged along an inner or outer perimeter of the main body (118"), the locking members being rotatable supported on the main body (118") about respective rotation axes (1 17f"). An actuation ring (117a"), arranged within the inner perimeter or outside the outer perimeter, comprises engagement elements (117d") extending into engagement slots (117e") of the locking members (119") to rotate the locking members (119") about said axes (117f") by rotation of the actuation ring (117a"). The locking members (119") assume a locking position, wherein their perimeter extends a first distance radially outwardly or inwardly from the locking mechanism, and an unlocked position, wherein said distance is shorter than the first distance or non-existent, as the distance from the axes (11 7f") to their perimeter varies along the perimeter. Fig. 16103" 0 131" 121" oo - 1"105c" 11 7b" 118" 111 119"1 FIG. 15 101", 0 118" 11 7a" 119", 119" 11 i7f "117d" FIG. 16
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