A locking mechanism for a quick connect coupling having a locking sleeve , the locking sleeve is axially displaceable for locking the quick connect coupling in a locked position and for unlocking the quick connect coupling in an unlocked position ; the locking mechanism comprising a safety ring , the safety ring is axially displaceable for engaging the locking sleeve and the safety ring being partly inside or partly outside the locking sleeve , the safety ring being positionable in three different axial positions, a first axial position for allowing the locking sleeve to be in the unlocked position , a second axial position for allowing the safety ring to rotate, a third axial position for allowing the locking sleeve to be in the locked position ; a spring , the spring acting between the locking sleeve and the safety ring , the spring comprising a spring force forcing the locking sleeve and the safety ring away from each other; and a track and a locking element , the locking element being relatively movable in the track ; characterised in that the track comprises two grooves in the axial direction connected at each one of their ends with a third groove in the circumferential direction; and wherein the first groove in the axial direction has a length corresponding to the first axial position for allowing the locking sleeve to be in the unlocked position , the second groove in the axial direction has a first end point corresponding to the third axial position , and the third groove has a second end point corresponding to the second axial position for allowing the safety ring to rotate. the locking mechanism comprising a safety ring , the safety ring is axially displaceable for engaging the locking sleeve and the safety ring being partly inside or partly outside the locking sleeve , the safety ring being positionable in three different axial positions, a first axial position for allowing the locking sleeve to be in the unlocked position , a second axial position for allowing the safety ring to rotate, a third axial position for allowing the locking sleeve to be in the locked position ; a first axial position for allowing the locking sleeve to be in the unlocked position , a second axial position for allowing the safety ring to rotate, a third axial position for allowing the locking sleeve to be in the locked position ; a spring , the spring acting between the locking sleeve and the safety ring , the spring comprising a spring force forcing the locking sleeve and the safety ring away from each other; and a track and a locking element , the locking element being relatively movable in the track ; characterised in that the track comprises two grooves in the axial direction connected at each one of their ends with a third groove in the circumferential direction; and wherein the first groove in the axial direction has a length corresponding to the first axial position for allowing the locking sleeve to be in the unlocked position , the second groove in the axial direction has a first end point corresponding to the third axial position , and the third groove has a second end point corresponding to the second axial position for allowing the safety ring to rotate. <EOS>