Vibration exciter

A vibration exciter, comprising:

• a casing with an accommodating cavity;
• a stator assembly assembled in the casing, comprising:
• a polar core fixed on an inner side of the casing;
• a magnetic steel fixed on one side of the polar core away from the casing;
• and
• a vibrator assembly assembled in the accommodating cavity and driven to vibrate by the stator assembly, comprising:
• a skeleton elastically connected to the casing;
• a mass block fixed to the skeleton, the skeleton being integrally formed and provided with a solid structure;
• and
• a coil wound around an outer side of the skeleton;
• wherein the skeleton comprises:
• a main body elastically connected to the casing;
• a first positioning protrusion;
• and
• a second positioning protrusion extended in parallel in a direction toward the casing from two ends of the main body;
• wherein a gap is formed between the first positioning protrusion and the second positioning protrusion, and the coil is wound around the main body and located in the gap.