Magnetic vibrator with inclined pole pieces

A magnetic vibrator comprising:

• a first magnetic portion comprising a first magnet, a second magnet and an inner plate disposed between the first magnet and the second magnet;
• and
• a second magnetic portion comprising a coil disposed around the first magnetic portion and a wrapper wrapping the coil and having a gap, wherein the coil has an upper surface, a lower surface disposed opposite to the upper surface, an inner surface and an outer surface disposed opposite to the inner surface, the outer surface is connected to the upper surface and the lower surface, and the inner surface is disposed opposite to the first magnetic portion;
• wherein an interval is configured between the first magnetic portion and the second magnetic portion, and the first magnetic portion and the second magnetic portion move axially with respect to each other when a current is occurred in the coil,
• wherein the wrapper covers the upper surface, the lower surface and the outer surface of the coil, the wrapper extends to the inner surface along an axis of the magnetic vibrator from the upper surface and the lower surface to cover a part of the inner surface to form the gap corresponding to a position of the inner plate,
• wherein magnetic lines generated by the first magnet and the second magnet extend outwardly from the inner plate toward the gap, and the magnetic lines return to the inner plate by passing through the first magnet and the second magnet, or magnetic lines generated by the first magnet and the second magnet extend from the gap of the wrapper toward the inner plate,
• wherein the first magnetic portion further comprises a pair of outer plates disposed on the other sides of the first magnet and the second magnet opposite to the inner plate, respectively, and the pair of outer plates is located within a space formed by the coil.