| 摘要 |
The stop is a single element (1) with two rows of rings (2), in parallel planes, which are joined together by a bridge (3). The bridge deforms elastically so that the rings can rotate round an axle (8), perpendicular to the planes of the rings. The holes (4) in the rings are brought, at least partially, opposite each other so that the cord can be threaded through them. When the rings are released a transversal force (7), of elastic recoil, is exerted on the rings to lock the cord in place. |
