| 摘要 |
A magnetic fastener comprising a permanent magnet member having first and second sides of opposite polarity, a first magnetic pole plate attached at the first side of the magnet member, a second magnetic pole plate removably attachable on the second side of the magnet member, the pole plates being magnetically attracted to the magnet member and to each other through the magnet member, the permanent magnet member being a dispersion of hard magnetic powder in a matrix of synthetic resin, and the first magnetic pole plate being integrally attached to the permanent magnet member by the permanent magnet member itself. The permanent magnet member may be comprised of a molded member made by casting wherein the first magnetic pole plate is at least partly incorporated in the molded magnetic member or may be embedded therein. A hole is provided through the permanent magnet member extending between the first and second sides, and projections on the first and second pole plates extend into the hole so that the projections are magnetically attracted to each other and to the corresponding pole plate. The permanent magnet member being comprised of hard magnetic powder bound together by a synthetic resin and the first pole plate being incorporated as a part of the permanent magnet itself obviates the necessity for a protective covering or casing over the permanent magnet member and a reduction in the magnetic reluctance between the permanent magnet member and the first and second pole plates.
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