One end of the rotation axle is connected with an electromagnet by a pull rod and a weight rod.
转动轴的一端通过拉杆和重锤杆与电磁铁相连。
2
When the pull is strong, the disc is moved toward the electromagnet, and when the pull is weak, the disc springs away from the electromagnet.
吸引力强时，金属片朝向电磁铁运动。吸引力弱时，金属片从电磁铁处弹回。
3
The utility model relates to an electromagnet, which is composed of a yoke iron, an armature iron, a push rod, a pull rod, a starting coil, a sustain coil, a controlling circuit and an end cover.