| 摘要 |
PURPOSE:To facilitate the manufacture of various shapes and to improve the attracting force of an engaging tool by forming a projection on both or any one of a ferromagnetic plate formed integrally with a permanent magnet made of a specific material and other ferromagnetic plate, and attracting them through a hole formed at the magnet. CONSTITUTION:A hole 1a is opened at a permanent magnet 1 of annular plate state made of rare earth element powder, such as samarium, cobalt, etc., and rubber synthetic resin, such as chloroprene, butadiene, etc. A ferromagnetic plate 2 is formed integrally with the pole face (a). Ferromagnetic projections 3a, 2a protruding from a ferromagnetic plate 3 abutting on the pole face (b) of the magnet 1 and/or from the plate 2 are detachably attracted through the hole 1a to one another or to the plate 2 or 3. The magnet has much larger holding force than a ferrite, and a sufficient attracting force is provided. Since the magnet is formed in a sheet state and can be easily punched in a predetermined shape, its cost can be reduced.
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