| 摘要 |
The spool carrier has a turntable (7) with a lower annular cavity (23) equipped with inner teeth (24), into which the first arm of a lever (22) tends to be snapped by means of a torsion spring (25); the second arm is connected to a metal wire (21) wound on the guide column (13) below and above the wire-guide support (20), in such a way that when the latter is subjected to a tension of the wire, it rises until it pulls the upper end of the metal wire (21) which with its lower end pulls the lever (22) which unsnaps the teeth (24) from the turntable (7), thereby bringing about the free pivoting of said turntable (7) and of the wire spool (26). A helical spring (16) keeps the wire guide (20) downwards by means of a rod (18); if said rod (18) is removed, this spring (16) can be replaced by another. <IMAGE> |
