| 摘要 |
PURPOSE:To obtain excellent and stable attracting force, by using a plastic magnet as a permanent magnet, omitting all cases for holding parts, using one entire engaging tool as a permanent magnet, thereby eliminating the bulky part of the engaging tool. CONSTITUTION:An attracting body A comprises a permanent magnet 1, a ferromagnetic plate 3 and a projection 3a. The ferromagnetic plate 3 and the projection 3a of the ferromagnetic plate 3, which is protruded toward a magnetic pole surface (a) from a magnetic pole surface (b) at the central part of the permanent magnet 1, are cast as a unitary body on the side of the pole surfaces in the permanent magnet 1. A top end part 3a' of the projection 3a is exposed. The permanent magnet 1 comprises a raw resin material, in which hard magnetic powder such as ferrite powder is mixed. A body to be attracted B comprises a ferromagnetic plate 2, which is attracted by the magnetic pole surface (a) of the permanent magnet 1. The ferromagnetic magnet plate 2 is attracted by the top end part 3a' of the projection 3a, which is exposed at the pole surface (a) of the permanent magnet 1. |
