| 摘要 |
<p>An energy-saving electromagnetic switch device comprises a casing (7), an electromagnetic device (11,12) and a movable magnetic pole (21,22) positioned within the casing. The movable magnetic pole is connected with an elasticity device (8) that is cooperative with the movable magnetic pole to control switch-on and switch-off of the electromagnetic switch device. At least one lock device (31,32,33), which can enable the electromagnetic switch device to automatically circularly change over between switch-on and switch-off through electrifying the electromagnetic device instantaneously, is arranged between the movable magnetic pole and the casing. The invention has the advantages of convenient operation and low cost.</p> |
