| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic device capable of reducing variations of response speeds. SOLUTION: This is equipped with a bobbin 2 around which a coil 1 is wound, an iron core 3 inserted into the bobbin 2, a permanent magnet 4 retained at one end side of the iron core 3, an armature 6 attracted to the iron core 3 according to energization to the coil 1, and a yoke 5 to constitute a closed magnetic passage together with the iron core 3, the permanent magnet 4, and the armature 6. The iron core 3 is coupled by injection into an injection hole 70a and fixed and adhered to the permanent magnet 4, a gap G is made between the lower face of the iron core 3 and the permanent magnet 4, and a support body 7 to support the iron core 3 against the permanent magnet 4 is installed. By absorbing variations of dimensions of the iron core 3 and the yoke 5 and variation of the thickness of a layer of a synthetic resin or the like to adhere the permanent magnet 4 and the yoke 5 as variation of the gap G, positional relationship of the upper face of the iron core 3 and the upper face of the yoke 5 is maintained, and the variations of the response speeds can be reduced by this. COPYRIGHT: (C)2008,JPO&INPIT
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