A SET OF LOCKABLE CYLINDRICAL ELEMENTS AND A STEERABLE INSTRUMENT COMPRISING SAME

摘要

A first cylindrical element (303; 303') and a second cylindrical element (305; 305') can be inserted into and locked to one another. The first cylindrical element (303; 303') has an opening (323)and a self-guiding mechanism (325) with a first outer edge with a longitudinally extending portion (325a), a longitudinally retracted portion (325c) and a spirally formed edge portion (325e). The second cylindrical element (305) has a first stopping element (317; 317') and a second stopping element (313; 313'). The first stopping element (317; 317') allows a sliding movement along the spirally formed edge portion (325e) when the first and second cylindrical elements are inserted into one another until a locked condition is reached in which the first stopping element (317; 317') abuts against the first longitudinally retracted portion (325c) and the second stopping element (313; 313') is in a snap-fit connection with the first opening (323).