Modular connection device

1. A modular connection device comprising:

a base comprising a plurality of connection surfaces, wherein each of the connection surfaces is connected with each other;

a plurality of connection members, wherein each of the connection members is detachably connected on each of the connection surfaces; and

a pivot member, wherein the pivot member is detachably disposed between the base and another base, the two bases are in close contact with each other and can be rotated parallel to each other via the pivot member;

wherein the pivot member is rotatably disposed between a middle position of one of the connection surfaces of each of the two bases and is hidden between the two connection surfaces when the two bases are pivoted, the connection members connected to the connection surfaces of each of the two bases adjacent to the connection surface in which the pivot member is located are freely rotatable through 360 degrees;

wherein a variable angle is formed between an axis of each of the connection members and each of the connection surfaces.

2. The modular connection device of claim 1 , wherein each of the connection surfaces is a planar surface or a curved surface.

3. The modular connection device of claim 1 , wherein each of the connection members is detachably inserted into each of the connection surfaces.

4. The modular connection device of claim 1 , wherein the angle is greater than 0 degrees and smaller than 180 degrees.

5. The modular connection device of claim 1 , wherein each of the connection member is a solid pillar or a hollow pillar.

6. The modular connection device of claim 1 , wherein each of the connection member is curve-shaped, straight-shaped or arc-shaped.

7. The modular connection device of claim 1 , further comprising a pivot member, wherein the pivot member is detachably disposed between the base and the connection member, and the base and the connection member are rotatable with each other through the pivot member.

8. A modular connection device comprising:

a base comprising a plurality of connection surfaces, wherein each of the connection surfaces is connected with each other;

a plurality of adapting members, wherein each of the adapting members is detachably connected on each of the connection surfaces; and

a plurality of connection members, wherein each of the connection members is detachably connected on each of the connection surfaces through each of the adapting members; and

a pivot member, wherein the pivot member is detachably disposed between the base and another base, the two bases are in close contact with each other and can be rotated parallel to each other via the pivot member;

wherein the pivot member is rotatably disposed between a middle position of one of the connection surfaces of each of the two bases and is hidden between the two connection surfaces when the two bases are pivoted, the adapting members or the connection members connected to the connection surfaces of each of the two bases adjacent to the connection surface in which the pivot member is located are freely rotatable through 360 degrees:

wherein each of the connection member is curve-shaped, straight-shaped or arc-shaped.

9. The modular connection device of claim 8 , wherein each of the connection surfaces is a planar surface or a curved surface.

10. The modular connection device of claim 8 , wherein each of the adapting members is detachably inserted to each of the connection surfaces.

11. The modular connection device of claim 8 , wherein each of the connection member is covered on each of the adapting member.

12. The modular connection device of claim 8 , wherein each of the connection member is a solid pillar or a hollow pillar.

13. The modular connection device of claim 8 , wherein each of the adapting member comprises a curved portion.