ELECTROMAGNETIC DEVICE AND SWITCHING DEVICE USING SAID ELECTROMAGNETIC DEVICE

摘要

An electromagnetic device includes: a fixed iron core (7); a movable iron core (8) which is disposed to face the fixed iron core (7) and to which a drive shaft (9) is fixed, whereby the movable iron core (8) is displaceable in an axis line direction of the drive shaft (9) between a retreated position and an advanced position; an electromagnetic coil (10); a permanent magnet (11) which retains the movable iron core (8) at the advanced position; supporting posts (12) which are provided parallel to the axis line direction on both side surfaces of the fixed iron core (7) and support the fixed iron core (7); an opening-side plate (13) which is provided at one end portion of the supporting post (12) in a longitudinal direction and in which the drive shaft (9) passes therethrough and is supported; and a closing-side plate (14) which is provided at the other end portion of the supporting post (12) in the longitudinal direction and in which the drive shaft (9) passes therethrough and is supported, wherein the advanced position of the movable iron core (8) is restricted by the fixed iron core (7) and the retreated position is restricted by the opening-side plate (13).