| 摘要 |
The invention concerns a fastening system, in particular for spectacle chain, comprising an external sliding tube with moderate or high friction, or to be screwed on an internal elongated element provided on one side with a cut forming a hook for receiving a link and blocking it when the external tube covers at least partially the opening of the cut forming a hook, the link capable of being released when the external tube does not cover at least partially the cut, said internal elongated element being linked to a cord on the other side. |
