| 摘要 |
<p>PURPOSE:To prevent the leakage of magnetic flux to the utmost and attain the high sensitivity, by a method wherein a permanent magnet and an armature in a movable block and a core are combined on the same plane to decrease the height, and the permanent magnet comes near a working gap to the utmost. CONSTITUTION:A movable block 21 comprises a permanent magnet 22 with rectangular cross-section and armaturs 23, 24 fixed to both sides of the magnet 22, and N-pole and S-pole are magnetized in arrow (k), (k') direction. A core 30 is E-shaped and has a center leg 31 at the center and side legs 32, 33 at both sides, and a coil 34 is wound on the middle leg 31. The movable block 21 is combined with the core 30 on the same plane so that projections 23a, 24a of the armature 23, 24 are disposed respectively at a working gap 35 formed between the middle leg 31 and end of the side leg 32 and at a working gap 36 formed between the middle leg 31 and end of the side leg 33. The movable block 21 is supported by a guide member and movable in parallel in the arrow (k), (k') direction.</p> |
