| 摘要 |
<p>PURPOSE:To improve the sensitivity and attractive force, by a method wherein induced magnetic flux of a coil is prevented from passing through a permanent magnet when an armature is moved in horizontal reciprocation. CONSTITUTION:Three yokes 1a-1c are arranged in three parallel lines, and an exciting coil 3 is wound on center portion of the center yoke 1b thereby a yoke block 9 is formed. Magnetic plates 4a, 4b and a permanent magnet 5 constitute two U-shaped armatures. Both armatures are connected in reverse direction of the magnetic attractive force of the permanent thereby an armature block 6 is formed. Both blocks 6, 9 are arranged so that acting surfaces 7a-7d of the yoke block 9 and acting surfaces 8a-8d of the armature block 6 are opposed at suitable gap. In this constitution, induced magnetic flux by the coil 3 does not pass through the permanent magnet 5, thereby the sensitivity and the magnetic attractive force can be improved.</p> |
