| 摘要 |
PURPOSE:The titled device having high sensitivity, consuming a small quantity of electric power and operated at high speed, wherein a yoke is substantially E-shaped, a permanent magnet is intermediately provided at a side piece on one side of the yoke, and an intermediate part of an armature is brought into contact with a central piece of the yoke to use the latter as a fulcrum. CONSTITUTION:An end part of the central piece 15a of the yoke 15 is made to be a supporting surface 15d for the armature 18, while end parts of the left and right side pieces 15b, 15c of the yoke 15 are made to be pole-contacting surfaces 15e, 15f for the armature. The permanent magnet 16 is intermediately provided in the magnetic circuit of the left side piece 15b of the yoke 15 to provide an electromagnet construction for both non-polar type and polar type so that a magnetic attracting force can be provided in a wide range at both ends of the stroke of the armature. |
