Vibration motor

1. A vibration motor, comprising:

a fixation part comprising a housing having an accommodation space and at least one coil fixed in the accommodation space,

a vibration part comprising a magnet and a weight for accommodating the magnet, the magnet being disposed to be opposed to the coil;

an elastic connecting part for suspending the vibration part in the accommodation space;

a damping element accommodated in the weight;

a limiting column penetrating the damping element and extending along a direction from the magnet to the coil, two ends of the limiting column being fixed to the housing.

2. The vibration motor as described in claim 1 , wherein the housing comprises an upper housing and a cover plate for forming the accommodation space; the upper housing comprises a top wall opposite to the cover plate; and the two ends of the limiting column are fixed respectively on the top wall and the cover plate.

3. The vibration motor as described in claim 2 , wherein a plurality of welding holes are disposed on the top wall and the cover plate; and two ends of the limiting column are welded in the welding holes.

4. The vibration motor as described in claim 1 , wherein a thickness of the damping element in the extension direction of the limiting column is not less than a thickness of the weight in the same direction.

5. The vibration motor as described in claim 1 , wherein the amount of the damping elements and the limiting columns are two.

6. The vibration motor as described in claim 1 , wherein the damping element is made from foam.

7. A vibration motor, comprising:

a fixation part comprising a housing and a cover plate forming an accommodation space with the housing;

a vibration part comprising a weight including a first weight and a second weight, a magnet located on the second weight, and at least one coil arranged opposite to the magnet and located on the first weight;

an elastic connecting part for suspending the vibration part in the accommodation space, the elastic connecting part comprising a first elastic connecting part for suspending the first weight in the accommodation space and a second elastic connecting part for suspending the second weight in the accommodation space, with a vibration direction of the first weight opposite to a vibration direction of the second weight;

a damping element accommodated in the weight;

a limiting column penetrating the damping element, the limiting column extending along a direction from the magnet to the coil, two ends of the limiting column being fixed to the housing.

8. The vibration motor as described in claim 7 , wherein the housing comprises an upper housing and a cover plate forming the accommodation space with the upper housing; the upper housing comprises a top wall opposite to the cover plate; and the two ends of the limiting column are fixed on the top wall and the cover plate, respectively.

9. The vibration motor as described in claim 8 , wherein a plurality of welding holes are disposed on the top wall and the cover plate; and two ends of the limiting column are welded in the welding holes.

10. The vibration motor as described in claim 7 , wherein a thickness of the damping element in the extension direction of the limiting column is not less than a thickness of the weight in the same direction.

11. The vibration motor as described in claim 7 , wherein the damping element penetrates the first weight and the second weight along the direction from the magnet to the coil.

12. The vibration motor as described in claim 11 , wherein, a first accommodation hole is formed on the first weight, a second accommodation hole is formed on the second weight, the first accommodation hole is aligned with the second accommodation hole, and the damping element penetrates the weigh by running through the first accommodation hole and the second accommodation hole.

13. The vibration motor as described in claim 7 , wherein the damping element is made from foam.