Electromagnet of electromagnetic lock of metro platform screen door

The invention belongs to the field of metro platform screen doors, and particularly relates to an electromagnet of an electromagnetic lock of a metro platform screen door. For an electromagnet of an electromagnetic lock of a common metro platform screen door, sometimes jamming occurs. According to the technical scheme, a first flat cylindrical step 13 is arranged, so that a first armature 11 is not jammed in an iron core; a second flat cylindrical step 23 is arranged, so that a second armature 21 is not jammed in the iron core; a third flat cylindrical step 33 is arranged, so that a third armature 31 is not jammed in the iron core; a ball head 14a is arranged so that a ball head connecting arm 14 can rotate in a first vertical cylindrical hole 12; a second circular ring 26a is arranged so that a double-circular-ring connecting arm 26 can rotate in a second vertical cylindrical hole 22; and a fourth circular ring 36a is arranged so that a steel wire rope connecting arm 36 can rotate in a third vertical cylindr