| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a movable iron core from falling during operation and obtain long-lasting stable dynamic characteristic of the movable iron core. SOLUTION: Movable iron cores 13 are arranged opposite to each other in a fixed iron core 12. A guide hole 1 is made at the center of a flat part 12C in a truncated cone-like projection 12D of the fixed iron core 12. A magnet killer M is comprised of a flat plate 2A that is arranged on the flat part 13D of a truncated cone-like concave 13A of the movable iron core 13, and a guide bar 2B projecting from the flat plate 2A. The guide bar 2B of the movable iron core 13 is centered and supported within the guide hole 1, thereby preventing the movable iron core 13 from falling.</p> |
