A power switch operating mechanism for moving a switch device between a cut-off condition and a closed condition by reciprocating drive of a movable contact, characterized in that said power switch operating mechanism comprises: a series of first permanent magnets (31, 32) constituted by arranging these permanent ring-shaped or arcuate-shaped magnets adjacently wherein magnetic poles of these permanent magnets are rotated by a maximum of 90° in each case in a cross-section including a central axis thereof; a series of second permanent magnets (31, 32) wherein magnetic poles of these ring-shaped or arcuate-shaped permanent magnets have a magnetization vector radial component in a same direction as said series of first permanent magnets (31, 32) or have a magnetization vector axial component in an opposite direction to that of said series of first permanent magnets (31, 32); a magnet fixing means (38, 39) for fixing said series of first permanent magnets (31, 32) and said series of second permanent magnets (31, 32) so that magnetization vector radial components of their respective magnetic poles face in a same direction; a coil that is interposed between said series of first permanent magnets (31, 32) and said second series of permanent magnets (31, 32) with a fixed clearance; a coil support means for being directly or indirectly linked with said movable contact so that said coil is fixed and is capable of parallel movement along said series of first and second permanent magnets (31, 32); and a power supply lead that supplies power for exciting said coil, a ferromagnetic body (62, 8) and a third permanent magnet (61b, 63), wherein a position of said movable contact is maintained by a magnetic attractive force of said third permanent magnet (61b, 63) with respect to said ferromagnetic body (62, 8), by relative approach of said ferromagnetic body and said third permanent magnet(61b, 63); whereby thrust for reciprocating drive of said movable contact is generated by an action of said excited coil and a magnetic circuit generated by said series of first permanent magnets and said series of second permanent magnets, wherein said power switch operating mechanism is configured to adjust said thrust so as to buffer the contact impact of said ferromagnetic body (62, 8) and said third permanent magnet (61b, 63). a series of first permanent magnets (31, 32) constituted by arranging these permanent ring-shaped or arcuate-shaped magnets adjacently wherein magnetic poles of these permanent magnets are rotated by a maximum of 90° in each case in a cross-section including a central axis thereof; a series of second permanent magnets (31, 32) wherein magnetic poles of these ring-shaped or arcuate-shaped permanent magnets have a magnetization vector radial component in a same direction as said series of first permanent magnets (31, 32) or have a magnetization vector axial component in an opposite direction to that of said series of first permanent magnets (31, 32); a magnet fixing means (38, 39) for fixing said series of first permanent magnets (31, 32) and said series of second permanent magnets (31, 32) so that magnetization vector radial components of their respective magnetic poles face in a same direction; a coil that is interposed between said series of first permanent magnets (31, 32) and said second series of permanent magnets (31, 32) with a fixed clearance; a coil support means for being directly or indirectly linked with said movable contact so that said coil is fixed and is capable of parallel movement along said series of first and second permanent magnets (31, 32); and a power supply lead that supplies power for exciting said coil, a ferromagnetic body (62, 8) and a third permanent magnet (61b, 63), wherein a position of said movable contact is maintained by a magnetic attractive force of said third permanent magnet (61b, 63) with respect to said ferromagnetic body (62, 8), by relative approach of said ferromagnetic body and said third permanent magnet(61b, 63); a ferromagnetic body (62, 8) and a third permanent magnet (61b, 63), wherein a position of said movable contact is maintained by a magnetic attractive force of said third permanent magnet (61b, 63) with respect to said ferromagnetic body (62, 8), by relative approach of said ferromagnetic body and said third permanent magnet(61b, 63);