| 摘要 |
<p>There is provided an electromagnetic contactor such that the necessary magnetic force is secured with one permanent magnet, rather than using a plurality of permanent magnets, and it is possible to efficiently use the magnetic force of the permanent magnet. The electromagnetic contactor includes a pair of fixed contacts (111), (112) disposed maintaining a predetermined interval and a movable contact (130) disposed so as to be connectable to and detachable from the pair of fixed contacts (111), (112), and an electromagnet unit (200) that drives the movable contact (130). The electromagnet unit (200) includes a magnetic yoke (201), (210) enclosing a plunger drive portion, a movable plunger (215) whose leading end protrudes through an aperture formed in the magnetic yoke (201), (210) and which is biased by a return spring (214), and a ring-form permanent magnet (220), magnetized in the direction in which the movable plunger (215) is movable, disposed and fixed so as to enclose a peripheral flange portion (216) formed on the protruding end side of the movable plunger (215).</p> |
