| 摘要 |
A magnetic lock device provides a powerful magnetic attraction by making full use of the magnetic lines of force provided by a permanent magnet without causing. A first part provides a magnetic attracting action, and a second part that is magnetically attracted by the first part. The first part includes a permanent magnet, a first ferromagnetic plate rigidly attached to one side of the permanent magnet, and a nonmagnetic enclosure for packaging the permanent magnet and the first ferromagnetic plate into one unit. The second part includes a second ferromagnetic plate detachably attached to the other side of the permanent magnet and has a ferromagnetic rod extending therefrom adapted to be inserted into center bores through the permanent magnet and enclosure for engaging the first ferromagnetic plate or its ferromagnetic rod. The magnetic lock device further includes an arrangement for enhancing the magnetism at the point where the first and/or second ferromagnetic plate(s) and the ferromagnetic rod(s) are connected for increasing the cross sectional area of the magnetic path. |
