| 摘要 |
PURPOSE:To improve characteristic as an electromagnetic relay and productivity by stabilizing polarized amount when a rectangular magnetic plate made of iron-chrome-cobalt alloy is permanent magnetized, concerning the manufacturing method of a seesaw type polarized relay. CONSTITUTION:Concerning the manufacturing method on a seesaw type polarized relay having an electromagnet completed body, as a driving source, to which a permanent magnet, whose both ends are polarized into S poles and the center thereof, into an N pole, is fixed between the end sides of a coil wound U-shaped core, a magnetic plate 21a', made of Fe-Cr-Co, and not polarized yet, is fixed to a U-shaped core 12b. The side yokes 3a, 3b of a polarizing jig 3 are positioned in the vicinities of both ends thereof so as to position and hold the magnetic plate 21a'. The center yoke 3c of the jig 3 is formed so as to be shorter than the yokes 3a, 3b, so that the jig 3 has an E-shaped side view. The magnetic plate 21a' is set on the yokes of the jig 3. Thereafter required current is allowed to flow in a coil 2d wound on the yokes 3a, 3b, and the magnetic plate 21a' is polarize so as to be a permanent magnet 21a, and to obtain an electromagnet completed body. |
