| 摘要 |
PURPOSE:To ensure strong attraction force in a magnetic circuit of a magnetic hook by preventing lines of magnetic force from being saturated, and hereby eliminating the cause of external leakage magnetism and utilizing as attraction force substantially all of the magnetic froce of a permanent magnet. CONSTITUTION:A title hook comprises an attraction side A in which a first ferromegnetic plate 2 is provided on a first magnetic pole of a permanent magnet plate 1 and with which the first ferromagnetic plate is integrated with the aid of a non-magnetic cover 3, and an attracted side B which includes a second ferromagnetic plate 18 that is mounted/demounted on/from a second magnetic pole side of the permanent magnet plate 1 through the cover 3, and a ferromagnetic protrusion 19 protruded on the second ferrlomognetic plate 18 and making contact with the first ferromagnetic palte 2 or the ferromagnetic protrusion 8 through holes 7, 5 formed through the cover 3 and the permanent magnet plate 1. Reinforcing means such as a magnetic reinforcing plate 11 is provided on a coupling part for coupling between the ferromagnetic plates 2, 18 and the ferromagnetic protrusions 8, 19. |
