| 摘要 |
An electromagnetic solenoid (100, 200) having a coil (102, 202) wound around a bobbin (106, 206) between first and second flanges (108, 110; 208, 210) for generating a magnetic force. An armature (114, 214) having an armature flange (118, 218) at a first end is within an interior portion of the tubular center section of the bobbin and is supported for axial displacement between a first and a second position. A permanent ring magnet (134, 234) is placed at the first end flange with an inner radial face spaced apart from an outer radial face of the armature flange by a radial gap, with the ring magnet supported by a retainer (148, 248) adjacent to the first end flange and fixed against axial displacement with respect to the bobbin. The solenoid comprises an outer case (172, 272) having a closed bottom at a first end and an open top at a second end and a flux washer (166, 266) disposed in the open top adjacent to a second end of the armature. |
