| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect open/close of a contact part in a non-contact manner. <P>SOLUTION: A detection part 3 includes a permanent magnet 31 attached to the bottom of a movable iron core 23 and a lead switch 30 disposed below a cap 24. When the contact part 1 is open, since the movable iron core 23 is positioned under the bottom of the cap 24, the lead switch 30 is turned ON due to magnetic force of the permanent magnet 31. When the contact part 1 is close, however, since the movable iron core 23 is positioned above an opening of the cap 24, the magnetic force of the permanent magnet 31 hardly affects on the movable iron core 23; thus the lead switch 30 is turned OFF. Accordingly, the open/close of the contact part 1 is detected based on the open/close of the lead switch 30 in a non-contact manner. <P>COPYRIGHT: (C)2013,JPO&INPIT |
