| 摘要 |
A connection element includes first and second retaining elements adapted to be connected to be freely rotated relative to each other about 360°. The first retaining element has a first outer annular portion and a first inner annular portion concentric to the first outer annular portion. The first outer annular portion has an inner locking portion of limited length in the circumferential direction. The second retaining element has a second outer annular portion and a second inner annular portion concentric to the second outer annular portion. The second inner annular portion is matingly accommodated by the first inner annular portion. An annular circumferentially extending locking portion of the second outer annular portion is within the first outer annular portion gripping behind the inner locking portion when the retaining elements are plugged together. |
