| 摘要 |
<p>A magnetic thrust theft-proof label comprises a shell composed of an upper cover (1) and a pedestal (2). A coil alarm (4) and a theft-proof nail locking mechanism are provided between the upper cover (1) and the pedestal (2). A theft-proof nail is inserted into the shell from the upper cover (1) and located by the locking mechanism. The locking mechanism comprises a locking bead cap (5) with a trapezoid section, a locking bead fixing seat (6) fitting with the inner cavity of the locking bead cap (5), no less than three locking beads and a spring component (7) resisting the locking bead fixing seat (6). A magnetic force switch device is provided on the locking mechanism. A magnetic block (8) in the magnetic force switch device is pushed by a magnet (11) in an unlocking piece (10) to move towards a direction away from the magnet (11). The magnetic block (8) pushes the locking mechanism to open.</p> |
