Magnetic fastener

1. A magnetic fastener, comprising:

a magnetic connector, wherein the magnetic connector includes a support bracket having a hole at a bottom;

a bottom support to hold the magnetic connector, wherein the bottom support includes a base and a neck extending from the base, wherein the neck has a distal end spaced away from the base and is partially received in the support bracket; and

an elastic member disposed inside the support bracket and extending at a height direction of the neck, wherein a first end of the elastic member is connected to the distal end of the neck and a second end of the spring is connected to the support bracket,

wherein the support bracket is moveable along the height direction of the neck.

2. The magnetic fastener of claim 1 , wherein the elastic member is a spring and is disposed inside the support bracket.

3. The magnetic fastener of claim 1 , wherein the neck includes a stop at the distal end, and wherein the first end of the elastic member is connected to the stop.

4. The magnetic fastener of claim 3 , wherein the stop extends radially from the neck and has a first cross-sectional dimension and wherein the hole of the support bracket has a second cross-sectional dimension less than the first cross-sectional dimension of the stop.

5. The magnetic fastener of claim 1 , wherein a wall of the hole of the support bracket has a clearance relative to the neck of the bottom support.

6. The magnetic fastener of claim 5 , wherein the clearance is in a range of about 0.2 mm to about 0.5 mm.

7. The magnetic fastener of claim 1 , wherien the support bracket is made from a permanent magnet.

8. The magnetic fastener of claim 1 , wherein the support bracket is made from ferromagnetic material and wherein the magnetic connector further includes a permanent magnet positioned on the support bracket.

9. The magnetic fastener of claim 8 , wherein the permanent magnet includes a central hole to receive the neck of the bottom support.

10. A magnetic fastener, comprising:

a magnet;

a ferromagnetic support bracket to hold the magnet, wherein the support bracket includes a hole at a bottom;

a bottom support including a neck, wherein the neck extends through the hole of the support bracket, is slidable in the hole, and includes a stop disposed inside the support bracket; and

a spring disposed between the stop of the bottom support and the bottom of the support bracket along an extending direction of the neck, wherein a first end of the spring is connected to the stop and a second end of the spring is connected to the bottom of the support bracket.

11. The magnetic fastener of claim 10 , wherein a wall forming the hole of the support bracket has a clearance relative to the neck.

12. The magnetic fastener of claim 11 , wherein the support bracket has a bowl shape.

13. A magnetic fastener in a vehicle, comprising:

a magnet;

a support bracket to hold the magnet, wherein the support bracket has a hole at a bottom and an upper surface of the support bracket or an upper surface of the magnet is to be connected to a first vehicle part;

a bottom support including a base to be connected to a second vehicle part and a neck extending from the base, wherein the neck has a distal end spaced away from the base and is partially received in the support bracket; and

a spring disposed inside the support bracket and extending at a height direction of the neck, wherein a first end of the spring is connected to the distal end of the neck and a second end of the spring is connected to the support bracket;

wherein the support bracket is moveable along the height direction of the neck.

14. The magnetic fastener of claim 13 , wherein a wall defining the hole of the support bracket has a clearance to an outer edge of the neck, and wherein the clearance is configured such that the upper surface of the support bracket or the upper surface of the magnet is capable of being inclined to a predetermined angle relative to an upper surface of the bottom support.

15. The magnetic fastener of claim 14 , wherein the support bracket includes a magnet holding portion and a receiving portion between the magnet holding portion and the base of the bottom support, wherein at least a portion of the spring and a portion of the neck is disposed in the receiving portion, and wherein a cross sectional area of an opening of the magnet holding portion is greater than a cross sectional area of an opening of the receiving portion.

16. The magnetic fastener of claim 15 , wherein the openings of the magnet holding portion and the receiving portion are circular, and the neck has a cylinder shape.

17. The magnetic fastener of claim 16 , wherein a distal end of the neck includes a stop extending radially from the neck.

18. The magnetic fastener of claim 13 , wherein the spring is a spiral spring and the neck is positioned inside the spring.

19. The magnetic fastener of claim 12 , wherein the first vehicle part is a roof panel and the second vehicle part is a headliner.