Locking ring reaches a password section of thick bamboo that contains it

The utility model discloses a locking ring reaches a password section of thick bamboo that contains it, the locking ring has outer wall, the edge is drawn together to outer wall bread two at least locking faces that the axis direction set gradually and the diameter reduces gradually of locking ring, at least two have respectively on the locking face along a plurality of recesses of circumference even interval setting, each the recess extends to correspondingly along length direction the one end of locking face, and arbitrary two the mutual not good multiple of quantity of the recess that has in the locking face. A password section of thick bamboo includes at least one as above the locking ring. The utility model discloses making a locking ring to cooperate with the mark ring of two kind at least specific types and realizing the change of password, application range is wide, simple structure, low in production cost, simultaneously, the inner tube end cover is detachable the connection with the inner tube end cap, and is equipped with the opening in the inner tube end cap for under the condition of the password of forgetting a password section of thick bamboo, the article still can be put in to base tube internally, is convenient for deposit.