Foldable trampoline with an adjustable tension system

1. A trampoline, comprising:

a trampoline mat;

a plurality of springs attached to the trampoline mat; and

a folding frame assembly configured to support the trampoline mat using the plurality of springs, wherein the folding frame assembly includes an adjustable tension system configured to adjust a circumference of the folding frame assembly to increase or decrease a tension of the plurality of springs, and

wherein the folding frame assembly includes a plurality of peripheral folding frame members coupled to the adjustable tension system and defining the circumference, the plurality of peripheral folding frame members configured to fold with respect to the adjustable tension system, and a plurality of folding legs, where the plurality of folding legs fold while attached to the peripheral folding frame members and wherein in a folded configuration the adjustable tension system serves as support for the folding frame assembly.

2. The trampoline of claim 1 , wherein the adjustable tension system comprises:

a first connecting member; and

a second connecting member moveably attached to the first connecting member to adjust a circumference of the folding frame assembly.

3. The trampoline of claim 2 , wherein the first connecting member is configured to slidably move in a first direction with respect to the second connecting member to increase the circumference of the folding frame assembly and increase a tension in the plurality of springs.

4. The trampoline of claim 3 , wherein the first connecting member is configured to slidably move in a second direction with respect to the second connecting member to decrease the circumference of the folding frame assembly and decrease a tension in the plurality of springs.

5. The trampoline of claim 2 , wherein the first connecting member includes a first external portion and a second adjustable portion, wherein the second adjustable portion is configured to move with respect to the second connecting member to decrease the circumference of the folding frame assembly and decrease a tension in the plurality of springs.

6. The trampoline of claim 2 , wherein the first connecting member includes a first external portion and a second adjustable portion, wherein the second adjustable portion is configured to move with respect the second connecting member to increase the circumference of the folding frame assembly and increase a tension in the plurality of springs.

7. The trampoline of claim 2 , wherein the adjustable tension system further includes:

a bolt and nut assembly to slidably attach the first connecting member and the second connecting member, wherein the bolt and nut assembly includes:

a bolt fixedly attached to the second connecting member; and

a bolt head structure fixedly attached to the first connecting member, wherein the bolt head structure rotatably secures the bolt to the first connecting member using an adjusting nut.

8. The trampoline of claim 7 , wherein an adjustable portion of the first connecting member slides into the second connecting member and decreases the circumference of the folding frame assembly when a first rotational force is applied to an adjusting nut in a first direction; and

wherein the adjustable portion slides further from the second connecting member and increases the circumference of the folding frame assembly when a second rotational force is applied to the adjusting nut in a second direction.

9. The trampoline of claim 2 , wherein the adjustable tension system further includes at least one of a hydraulic jack or an air cylinder to moveably attach the first connecting member with respect to the second connecting member.

10. The trampoline of claim 2 , wherein the adjustable tension system further includes a gear assembly to moveably attach the first connecting member with respect to the second connecting member.

11. The trampoline of claim 1 , wherein in the folded configuration the plurality of peripheral folding frame members fold into each other while the plurality of folding legs fold without disassembly.

12. The trampoline of claim 1 , wherein in an unfolded configuration the plurality of folding legs provide support for the folding frame assembly.

13. The trampoline of claim 1 , wherein in an unfolded configuration the adjustable tension system is lifted from a ground position by the plurality of folding legs.

14. A trampoline, comprising:

a trampoline mat;

a plurality of springs attached to the trampoline mat; and

a folding frame assembly configured to support the trampoline mat using the plurality of springs, wherein the folding frame assembly includes an adjustable tension system coupled thereto, the adjustable tension system configured to adjust a circumference of the folding frame assembly to increase or decrease a tension of the plurality of springs, wherein the folding frame assembly is configured to fold with respect to the adjustable tension system, and wherein the adjustable tension system remains attached to the folding frame members in a folded configuration.

15. The trampoline of claim 14 , wherein the folding frame assembly includes a plurality of peripheral folding frame members and a plurality of folding legs connected to the folding frame assembly, the plurality of folding legs configured to fold while attached to the peripheral folding frame members; and

wherein in an unfolded configuration, the adjustable tension system is lifted from a ground position by the plurality of folding legs and in a folded configuration, the adjustable tension system serves as support for the folding frame assembly.

16. The trampoline of claim 15 , wherein the plurality of folding legs are each connected to the folding frame assembly by a hinge.

17. A trampoline, comprising:

a trampoline mat;

a plurality of springs attached to the trampoline mat;

a folding frame assembly configured to support the trampoline mat using the plurality of springs, wherein the folding frame assembly includes:

a first peripheral folding frame member and a second peripheral folding frame member; and

an adjustable tension system that includes a first connecting member and a second connecting member, wherein the adjustable tension system is configured to slidably move the first connecting member with respect to the second connecting member to decrease a circumference of the folding frame assembly such that the adjustable tension system decreases a tension of the plurality of springs and wherein the adjustable tension system is configured to slidably move the first connecting member with respect to the second connecting member to increase a circumference of the folding frame assembly such that the adjustable tension system increases a tension of the plurality of springs, wherein the first peripheral folding frame member and the second peripheral folding frame member are configured to fold with respect to the adjustable tension system.

18. The trampoline of claim 17 , wherein the first connecting member includes an adjustable portion configured to slidably move into the second connecting member and decrease the circumference of the folding frame assembly when a first force is applied to the adjustable tension system; and

wherein the adjustable portion slides further from the second connecting member and increases the circumference of the folding frame assembly when a second force is applied to the adjustable tension system.

19. The trampoline of claim 18 , wherein the adjustable tension system may be adjusted when the trampoline is in use to configure a plurality of different circumferences of the folding frame assembly, such that the plurality of springs may have a plurality of different tension levels when the trampoline is in use.

20. The trampoline of claim 19 , wherein the adjustable tension system comprises:

a bolt and nut assembly to slidably attach the first connecting member and the second connecting member, wherein the bolt and nut assembly includes:

a bolt fixedly attached to the second connecting member; and

a bolt head structure fixedly attached to the first connecting member, wherein the bolt head structure rotatably secures the bolt to the first connecting member using an adjusting nut.