Easy-to-assemble trampoline

Abstract

The present invention discloses an easy-to-assemble trampoline, which includes a flexible bouncing mat, a frame, and a plurality of flexible rods, the top end of the flexible rod is arranged at its periphery or its bottom of the flexible bouncing mat, and the bottom end of the flexible rod is retained on the frame. The top end of each flexible rod is fixedly mounted at the periphery or bottom of the flexible bouncing mat by a buckle structure; the buckle structure includes a mounting member, a flexible belt and at least one clamping member; one end of the flexible belt is fixed on the flexible bouncing mat, the clamping member is fixed on the flexible belt, and the mounting member is provided with a through hole; the flexible belt can pass through the through hole, and the clamping member holds the flexible belt at an outlet of the through hole.

Claims

1. An easy-to-assemble trampoline, comprising: a flexible bouncing mat; a frame; and a plurality of resiliently flexible rods with a top end and a bottom end of each flexible rod, said top end of said flexible rod is arranged at a periphery or at a bottom of said flexible bouncing mat, and said bottom end of flexible rod is retained on said frame, thereby said flexible bouncing mat is set up above said frame; said flexible rod is a straight rod with bending stiffness of 1000 N/m~10000 N/m, said top end of said flexible rod can be deflected 10 mm~90 mm from natural straight state towards a center of said flexible bouncing mat, so that said flexible rod is bent and installed at said periphery or at said bottom of said flexible bouncing mat to support and tension said flexible bouncing mat.

2. The easy-to-assemble trampoline according to claim 1, wherein said bottom end of said flexible rod is fixed and retained in said frame by an installation structure; said installation structure includes pairs of upper inserting holes on an upper side of said frame and corresponding lower inserting holes on a lower side of said frame, each pair of said upper inserting hole and said lower inserting hole are staggered; said flexible rod is inserted into a pair of said upper inserting hole and said lower inserting hole respectively.

3. The easy-to-assemble trampoline according to claim 1, wherein said installation structure also has a first sleeve corresponding to each pair of said upper inserting hole and said lower inserting hole, said first sleeve is inserted into a pair of said upper inserting hole and said lower inserting hole, and said bottom end of said flexible rod is inserted into said first sleeve.

4. The easy-to-assemble trampoline according to claim 3, wherein a diameter of said lower inserting hole is larger than a diameter of a bottom end of said first sleeve and less than a diameter of a main body of said first sleeve, thereby preventing said first sleeve from falling off from said lower inserting hole.

5. The said easy-to-assemble trampoline according to claim 2, wherein said installation structure also has an elastic member, said elastic member is located between said upper inserting hole and said flexible rod, thereby adjusting a position of said flexible rod in said frame.

6. The easy-to-assemble trampoline according to claim 5, wherein said upper inserting hole is arranged as an elliptical hole, opposite two ends of said elliptical hole, named as A end and B end respectively, are located on an inside and an outside of said upper side of said frame respectively; said elastic member is placed into said A end or said B end, thereby adjusting said position of said flexible rod in said frame.

7. The easy-to-assemble trampoline according to claim 1, wherein a diameter of said flexible rod is 0.5 cm-3 cm, and a length of said flexible rod is 0.3 m~1.5 m.

8. The easy-to-assemble trampoline according to claim 1, wherein said flexible rod is made from alloy aluminum.

9. The easy-to-assemble trampoline according to claim 1, wherein said frame is a circle formed with several arc-shape steel pipes connected at beginnings and tails of said arc-shape steel pipes; a joint of adjacent said arc-shaped steel pipes is provided with a first plug-in cylinder and a first plug-in connector matched with said first plug-in cylinder; said first plug-in connector is inserted into said first plug-in cylinder and fixedly connected therein by a nail pin.

10. The easy-to-assemble trampoline according to claim 1, wherein said trampoline also includes a plurality of supporting structures, which support said frame from underneath of said frame so as to keep said frame maintained above a ground; each of said supporting structure is provided with a horizontal rod, a first vertical rod and a second vertical rod which are arranged at two ends of said horizontal rod, and a third vertical rod is arranged at a middle of said horizontal rod; said first vertical rod and said second vertical rod are respectively inclined toward a central direction of said flexible bouncing mat, and a top of said first vertical rod and a top of said second vertical rod are reversely bent, said frame is provided with matching cylinders which matching with said top of said first vertical rod and said top of said second vertical rod respectively.

11. The easy-to-assemble trampoline according to claim 1, wherein said trampoline also includes several supporting rods evenly distributed around said flexible bouncing mat; said first vertical rod is welded with a second sleeve, and a bottom end of each of said supporting rod is inserted into said second sleeve; an outlet of said second sleeve is flat, and said bottom end of said support rod is matched with said second sleeve; a bottom of said second sleeve is arranged as a cylinder, and a diameter of said cylinder is slightly smaller than a diameter of said outlet of said second sleeve.

12. The easy-to-assemble trampoline according to claim 11, wherein each of said supporting rod is a long arc-shaped rod formed by two short arc-shaped steel pipes jointed together; a pair of second plug-in cylinder and a second plug-in connector matched each other are also provided at a joint of said two short steel pipes respectively, said second plug-in connector is inserted into said second plug-in cylinder.

13. The easy-to-assemble trampoline according to claim 1, wherein said trampoline also includes a protective net with a bottom of said protective net arranged around said flexible bouncing mat, said protective net extends upwards, a top of said protective net is supported by a plurality of supporting rods disposed around said flexible bouncing mat, so as to form a closed or unclosed space for bouncing jump; said bottom of said protective net is connected to said periphery or said bottom of said flexible bouncing mat by zippers.

14. The easy-to-assemble trampoline according to claim 13, wherein a top of each said supporting rod is provided with an inserting hole, an upper part of said protective net is provided with a plurality of upper hooks, and said hooks are inserted into said holes respectively; each of said buckle structures is provided with a lower hook; and all of said lower hooks hook said protective net at a lower end of said protective net.

15. The easy-to-assemble trampoline according to claim 14, wherein a top of said protective net is also provided with a basketball frame; said basketball frame is fixed on one of said supporting rods; said protective net is provided with a zipper door; and said frame is also provided with a ladder.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG. 1 is a perspective view of the trampoline according to the present invention.

[0044] FIG. 2 is a perspective view of the flexible rod according to the present invention.

[0045] FIG. 3 is a perspective view of the installation structure of the trampoline according to the present invention.

[0046] FIG. 4 is a decomposition view of the installation structure of the trampoline according to the present invention.

[0047] FIG. 5 is a perspective view of the first sleeve according to the present invention.

[0048] FIG. 6 is perspective view of the arc-shaped steel pipe 21 according to the present invention.

[0049] FIG. 7 is a perspective view of the elastic member 27 according to the present invention.

[0050] FIG. 8 is another perspective view of the trampoline according to the present invention.

[0051] FIG. 9 is a perspective view of the buckle structure according to the present invention.

[0052] FIG. 10 is an enlarged view of the A of FIG. 8, which shows another perspective view of the buckle structure according to the present invention.

[0053] FIG. 11 is a perspective view of the flexible rod is used in conjunction with the buckle structure and the first sleeve.

[0054] FIG. 12 is another perspective view of the trampoline according to the present invention.

[0055] FIG. 13 is another perspective view of the buckle structure according to the present invention.

[0056] FIG. 14 is a decomposition view of the trampoline according to the present invention.

[0057] FIG. 15 is a perspective view of the supporting structure 40 and the supporting rod 60 of the trampoline according to the present invention.

[0058] FIG. 16 is a perspective view of the second sleeve 45 according to the present invention.

[0059] FIG. 17 is another perspective view of the buckle structure according to the present invention.

[0060] FIG. 18 is a decomposition view used in conjunction with the top of the supporting rod according to the present invention.

[0061] FIG. 19 is another perspective view of the trampoline according to the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

[0062] The followings will further explain the present invention with the embodiments, which are the preferable embodiments according to the present invention.

[0063] Referring to FIG. 1, the popular trampoline usually includes a flexible bouncing mat 10, a frame 20 and a plurality of resiliently flexible rods 30, each rod 30 has a top end 31 and a bottom end 32. The top end 31 of the flexible rod 30 is installed at the periphery or at the bottom of the flexible bouncing mat 10, and the bottom end 32 of the flexible rod 30 is retained in the frame 20 so that the flexible bouncing mat 10 is set up above the frame 20. Under the pressure from the flexible bouncing mat 10, the flexible rods 30 are usually bent in a certain arc so as to tension the flexible bouncing mat 10. The user can jump, play, and perform on the flexible bouncing mat 10. The flexible rods 30 are preferably made from aviation alloy aluminum, glass fiber, or carbon fiber.

[0064] The flexible bouncing mat 10 is preferably in round shape, it also can be other shape, such as a square, a pentagonal, a hexagonal, an oval, etc. The frame 20 is a circle formed by several arc-shaped steel pipes 21 connected at the beginnings and the tails. Referring to FIG. 6, the joint of adjacent two arc-shaped steel pipes 21 is respectively provided with a first plug-in cylinder 21a and a first plug-in connector 21b which are matched to each other; the first plug-in connector 21b is inserted into the first plug-in cylinder 21a and connected therein by a nail pin fixedly.

[0065] The frame 20 also can be placed on the ground, it is preferably placed on the supporting structure 40.

[0066] In order to support the flexible mat 10 and the user, the flexible rod 30 generally needs to have certain bending resistance. Especially in the process of the installation of the flexible rods 30, the bottom end 32 of each flexible rod 30 is usually fixed on the frame 20 first, then the top end 31 of the flexible rod 30 is deflected from the natural straightening status to bend towards the center of the flexible mat 10, so that the flexible rods 30 can support and tension the flexible mat 10 to meet the requiring elasticity of bouncing jump.

[0067] In the prior art, the bending stiffness of the flexible rod 30 is generally less than 3000 N/m. This requires that the top end 31 of the flexible rod 30 deflects 300-450 mm towards the center of the flexible bouncing mat 30 from the natural straightening status when it has not been connected to the edge of the flexible bouncing mat 10, in order to support the flexible bouncing mat 30 and make the elasticity of the flexible bouncing mat 30 meet the requirements of the trampoline. The bending stiffness of flexible rod 30 in the prior art is too low, resulting in poor elastic recovery ability and easy to be bent. After the trampoline is used for a period of time, the flexible rods 30 can’t be restored to the original position so that the flexible bouncing mat 10 no longer maintains at its tension state, its structure is relaxed, and its elasticity is decreased. In addition, when the bending stiffness of the flexible rod 30 is less than 3000 N/m, the maximum size of the flexible bouncing mat 10 can only be 13 feet. Otherwise, the elasticity of the flexible bouncing mat 10 can’t meet the requirements.

[0068] The applicant has found that the flexible rod 30 with improved bending stiffness can overcome the above-mentioned defects. When the flexible rod 30 is a straight rod with bending rigidity of 3000 N/m~10000 N/m, the bottom end 32 of the flexible rod 30 is retained on the frame, and the top end 31 of the flexible rod deflects 10 mm~200 mm from the natural straight state to bend towards the center of the flexible bouncing mat 10, so that the flexible rod 30 is bent and installed at the periphery or at the bottom of the flexible bouncing mat 10 to support and tighten the flexible bouncing mat 10. If the bending stiffness of the flexible rod 30 is 3000 N/m~10000 N/m, the elastic restoring force of the flexible rod 30 increases and the flexible rod is not easy to fatigue and deform. Although the bending stiffness of the flexible rod increases, the distance of deflection towards the center of the flexible bouncing mat is reduced, which makes the installation of the flexible rod easier.

[0069] At present, the material of the flexible rod in the market is glass fiber or carbon fiber. The glass fiber has good corrosion resistance, insulating property, heat-insulating property and high strength etc. However, the hardness of the glass fiber is high, combined with its inherent brittleness, the glass fiber has the defects of no bending resistance, poor abrasion resistance, poor flexibility and the likes. If the glass fiber rod is used repeatedly for a long time or used in the low-temperature state, it is easy to crack and lose its original elasticity. Sometimes it is broken, resulting in trampoline damage. There is a potential safety hazard. In addition, according to the list of carcinogens published by the World Health Organization International Cancer Research Agency on 27 Oct. 2017, glass fiber is listed as an unsafe material.

[0070] Preferably, the material of the flexible rod 30 according to the present invention is aluminum alloy. Aluminum alloy weights light, its surface can be oxidized, it has better wind resistance and stronger compressive capacity than glass fiber, and it also has good strength, toughness, fatigue resistance and plasticity, not easy to break. Even if the pressure exceeds its upper limitation, the aluminum alloy rod does not break, but increases the curvature. It will not cause trampoline to damage, thereby improving the safety of trampoline.

[0071] Preferably, the diameter of the flexible rod is 0.5 cm~3.0 cm.

[0072] Preferably, the length of the flexible rod is 0.3 m ~1.5 m.

[0073] When the bending stiffness of the flexible rod is 3000 N/m~10000 N/m, the diameter of the flexible bouncing mat is 11 feet~20 feet.

[0074] Referring to FIG. 3 and FIG. 4, the bottom end 32 of the flexible rod 30 is fixed and retained on the frame 20 by an installation structure. The installation structure includes pairs of upper inserting holes 24 provided on the upper side of the frame 20 and lower inserting holes 25 provided on the lower side of the frame 20. And each pair of the upper inserting hole 24 and the lower inserting hole 25 are disposed in stagger. The bottom end 32 of the flexible rod 30 is inserted obliquely into the upper inserting hole 24 and the lower inserting hole 25.

[0075] The installation structure also includes a first sleeve 26 corresponding to each pair of the upper inserting hole 24 and the lower inserting hole 25. The first sleeve 26 is inserted into the upper inserting hole 24 and the lower inserting hole 25. The bottom end of the flexible rod 30 is inserted into the first sleeve 26.

[0076] Referring to FIG. 3, FIG. 4 and FIG. 5, in order to prevent the first sleeve 26 from falling off from the lower inserting hole 25, the diameter of the bottom end 262 of the first sleeve 26 is less than the diameter of the main body 261 of the first sleeve 26. In particularly, the hole diameter of the lower inserting hole 25 is larger than the diameter of the bottom end 262 of the first sleeve 26 but less than the diameter of the main body 261 of the first sleeve 26, thereby preventing the first sleeve 26 from falling off from the lower inserting hole 25.

[0077] Further, the top end 263 of the first sleeve 26 is provided with a gradually broaden outlet in the extending direction so as to facilitate the insertion of the bottom end 32 of the flexible rod 30.

[0078] When the bottom end 32 of the flexible rod 30 is installed, the first sleeve 26 is inserted into a pair of the upper inserting hole 24 and the lower inserting hole 25 firstly, then the bottom end 32 of the flexible rod 30 is inserted directly into the first sleeve 26. Or the bottom end 32 of the flexible rod 30 can be inserted directly into the first sleeve 26 firstly, and then the two are inserted into a pair of the upper inserting hole 24 and the lower inserting hole 25. The installation is simple and convenient.

[0079] It should be understood that when the bottom end 32 of the flexible rod 30 and the first sleeve 26 are inserted into the lower inserting hole 25, the bottom end 32 of the flexible rod 30 is fixed in the frame 20. When all of the top ends 31 of the flexible rods 30 are installed around the flexible bouncing mat 10, the installing position of the top ends 31 of the flexible rods 30 remain unchanged, and the tension and elasticity of the flexible bouncing mat 10 are maintained constant.

[0080] Referring to FIG. 3, FIG. 5 and FIG. 7, an elastic member 27 is also arranged in the upper inserting hole 24. The elastic member 27 islocated between the upper inserting hole 24 and the flexible rod 30 so as to adjust the position of the flexible rod 30. Preferably, the upper inserting hole 24 is arranged as an elliptical hole, and the opposite two ends of the elliptical hole, named as A end and B end respectively, are located on the inside and the outside of the upper side of the frame 20 respectively. The elastic member 27 is placed at the A end or the B end so as to adjust the position of the flexible rod 30 in the frame 20, so that the tension and the elastic force to the bouncing mat 30 are adjusted. Concretely, when the bottom end 32 of the flexible rod 30 and the first sleeve 26 are inserted into the upper inserting hole 24 and the lower inserting hole 25, the elastic member 27 is placed at the A end, that is a position close to the inside of the upper side of the frame 20, and the flexible rod 30 and the first sleeve 26 are squeezed to the B end, at this time, the flexible rod 30 exerts a greater tension force on the flexible bouncing mat 10 and the elastic flexible bouncing mat 30 has higher elasticity. When the elastic member 27 is placed at the B end, that is a position close to the outside of the frame 20, the flexible rod 30 and the first sleeve 26 are squeezed to the A end, the flexible rod 30 exerts relatively smaller tension force on the flexible bouncing mat 10, and the elasticity of the flexible bouncing mat 10 is reduced.

[0081] Preferably, referring to FIG. 6, two limiting grooves 28 are symmetrically arranged in middle of the hole wall of the upper inserting hole 24. Referring to FIG. 7, the side surface of the elastic member 27 adjacent closely to the first sleeve 26 is called as the inner side 271, the opposite other side surface of the elastic member 27 adjacent closely to the hole wall of the upper inserting hole 24 is called as the outer side 272. Both of the inner side 271 and the outer side 272 are arranged as curved surface, the intersection of the two curved surfaces is provided with a clamping block 273, the clamping block 273 and the limiting groove 28 are matched to each other and can hold each other.

[0082] Preferably, the intersection of the clamping block 273 and the outer side 272 is provided with an upper convex part 275. The bottom of the outer side 272 of the elastic member 27 is provided with an lower convex part 274. When the elastic member 27 is inserted into the upper inserting hole 24, the upper convex part 275 and the lower convex part 274 are holding the hole periphery of the upper inserting hole 24 from the upper direction and the lower direction respectively, thereby preventing it falling off from the upper inserting hole 24.

[0083] Preferably, referring to FIG. 1, FIG. 8 and FIG. 11, in order to facilitate the installation of the top ends 31 of the flexible rods 30, a plurality of buckle structures 70 are arranged at the periphery or at the bottom of the flexible bouncing mat 10. Each buckle structure 70 is corresponded with one flexible rod 30 respectively, the top end 31 of each flexible rod 30 can be detachably installed in a predetermined position at the periphery or at the bottom of the flexible bouncing mat 10. The installation manner is labor-saving and convenient. Referring to FIG. 3, the buckle structure 70 includes a mounting member 71, a flexible belt 72 and at least one clamping member 73 fixed on the flexible belt 72. One end of the flexible belt 72 is fixed on the bottom of the flexible bouncing mat 10, the clamping member 73 is fixed on the flexible belt 72, and the mounting member 71 is provided with a through hole 713; the flexible belt 72 and the clamping member 73 can pass through the through hole 713. After the flexible belt 72 and the clamping member 73 are passed through the through hole 713, the clamping member 73 is rotated to stuck at the outlet of the through hole 713 so as to prevent the flexible belt 72 from being pulled back from the through hole 713. The top end 31 of the flexible rod 30 is fixedly contained in the mounting member 71, therefore the top end 31 of the flexible rod 30 is installed at a predetermined position of the flexible bouncing mat 10.

[0084] Preferably, referring to FIG. 10, in one embodiment of the present invention, the bottom of the mounting member 71 is provided with a receiving groove (not shown) in which the top end 31 of the flexible rod 30 is fixedly disposed. Preferably, the receiving groove is arranged in an extending direction of the top end 31 of the flexible rod 30 so as to facilitate the insertion of it. In the embodiment shown in FIG. 10, the mounting member 71 is similar to a cubic shape. It should be understood that the shape of the mounting member 71 is not limited to be the shape as shown in FIG. 10, it also can be spherical, polyhedral or any other shape. The present invention does not specifically limit the shape of the mounting member 71, and any change in the external shape of the mounting member 71, without departing from the basic concept of the present invention, should be regarded in the scope of protection as defined in the present invention.

[0085] Preferably, referring to FIG. 10, FIG. 11 and FIG. 12, the mounting member 71 has a pipe part 711 and an expanded head 712 arranged at the top end of the pipe part 711. The top end 31 of the flexible rod 30 is inserted into and fixed with the pipe part 711. The pipe part 711 is arranged in an extending direction of the top end 31 of the flexible rod 30 so as to facilitate the insertion of the top end 31 of the flexible rod 30. The expanded head 712 is provided with the through hole 713.

[0086] Referring to FIG. 10, the size of the expanded head 712 is larger than that of the pipe part 711, thereby increasing the contact area between the mounting member 71 and the flexible bouncing mat 10, which more firmly supports the flexible bouncing mat 10.

[0087] Preferably, a baffle 714 is protruded on the outlet of the through hole 723 of the expanded head 712. The baffle 714 can obstruct the clamping member 73, thereby preventing the clamping member 73 from sliding and retracting from the through hole 723.

[0088] Concretely, referring to FIG. 10, the expanded head 712 is similar to a cubic shape, its bottom surface of the expanded head 712 is integrated with the pipe part 711. The through hole 713 is arranged along its side direction of the expanded head 712 with a large end and a small end which is gradually decreased from the large end. The through hole 713 is a flat hole. Both of the flexible belt 72 and the clamping member 73 are flat shape, so that they can cooperate with the through hole 713 and pass through the through hole 713. Once the flexible belt 72 and the clamping member 73 are passed through the through hole 713, the clamping member 73 is rotated to a certain angle to hold the clamping member 73 at the outlet of the through hole 713.

[0089] Preferably, the clamping member 73 can pass through the through hole 713 and is held on the outlet of the through hole 713. In one of the embodiment of the invention, the clamping member 73 has a short edge and a relatively long edge. The length of the short edge of the clamping member 73 is slightly less than the aperture of the through hole 713, and the length of the long edge of the clamping member 73 is slightly larger than the aperture of the through hole 713. Such configuration enables the clamping member 73 to pass through from one side of the through hole 713 to the other side, the clamping member 73 is rotated after it has passed through the through hole 713, and the clamping member 73 can be held at the outlet of the through hole 713 along its long edge.

[0090] It should be understood that the clamping member 73 matches with the through hole 713. For example, if the clamping member 73 is a long cylinder shape, the through hole 713 should also be a long cylinder shape; if the clamping member 73 is a long cubic shape, the through hole 713 must also be a long cubic shape. Referring to FIG. 9, FIG. 10 and FIG. 13, in one of the embodiment of the invention, the clamping member 73 is provided as a thin piece. The through hole 713 is also arranged as a flat shape. Preferably,, the end of the clamping member 73 is provided with a hook.

[0091] After the clamping member 73 is passed through the through hole 713, the clamping member 73 is held at the outlet of the hole 713, the flexible belt 72 is fixed and prevented from being retracted under the action of pulling force, thereby fixing the top end of the flexible rod 30 at the periphery or at the bottom of the flexible bouncing mat 10.

[0092] It should be understood that the positions of the clamping members 73 on the flexible belts 72 must meet the design purpose of “installing the top ends 31 of all the flexible rods 30 at the periphery or at the bottom of the flexible bouncing mat 10”. Therefore, the clamping member 73 shall be installed at a suitable position on the flexible belt 72. The design purpose can’t be achieved if the clamping member 73 is too far or too close to the flexible bouncing mat 10.

[0093] The flexible belt 72 is fixed on the flexible bouncing mat 10. It should be understood that the flexible belt 72 can be fixed at the flexible bouncing mat 10 in a variety of ways, for example, by welding, clamping, fastening, etc. In the preferred embodiment of the invention, the flexible belt 72 is sewn at the bottom of the flexible bouncing mat 10.

[0094] Referring to FIG. 11, the mounting member 71 may be arranged directly at the top end of the flexible rod 30. During the installation, the bottom end 32 of the flexible rod 30 is firstly inserted into the first sleeve 26 of the frame 20, then the flexible belt 72 is passed through the through hole 723, and the top end 31 of the flexible rod 30 and the mounting member 71 are pushed to a predetermined position at its periphery or at its bottom of the flexible bouncing mat 10, the clamping member 73 is pulled out of the through hole 713, and the clamping member 73 is rotated to be held at the outlet of the through hole 713. Therefore, the top ends 31 of the flexible rods 30 and the expanded heads 712 are assembled at the periphery or at the bottom of the flexible bouncing mat 10.

[0095] The mounting member 72 may also be directly installed onto the flexible belt 71. During the installation, the bottom end 32 of the flexible rod 30 is firstly inserted into the first sleeve 26 of the frame 20, the mounting member 72 is adjusted to the proper position of the flexible belt 71, the top end 31 of the flexible rod 30 is inserted into the mounting groove or the tube part of the mounting member 72, the top end 31 of the flexible rod 30 and the mounting member 72 are pushed to a predetermined position at its periphery or at its bottom of the flexible bouncing mat 10, the clamping member 73 is pulled out from the through hole 713, the clamping member 73 is rotated to be held at the through hole 713, so the top end 31 of the flexible rod 30 and the head 722 are installed at its periphery or at its bottom of the flexible bouncing mat 10.

[0096] In the structure of trampoline, a number of flexible rods 30 are evenly distributed between the frame 20 and the flexible bouncing mat 10, and thus support the flexible bouncing mat 10 so that the force on the flexible bouncing mat 10 is balanced in all directions. In the installation process of trampoline, if multiple of the flexible rods 30 are installed in sequence on the flexible bouncing mat 10, the side of the flexible bouncing mat 10, where hasn’t installed the flexible rods 30, will be suffer uneven force, resulting in the difficulty of installing the flexible rods on that side, and even affecting the structure of the product. To resolve this shortcomings, referring to FIG. 12 and FIG. 13, the number of the clamping member 73 on each flexible belt 72 of the present invention is two, and the first clamping member 73 is capable of installing the top end of the flexible rod 30 and the head 722 in a pre-installed position, for example, its periphery of the flexible bouncing mat. The second clamping member 73 is capable of installing the top end of the flexible rod 30 and the head 722 in the installing position, for example, the bottom of the flexible bouncing mat 10. During the installation, the bottom end 32 of the flexible rod 30 is firstly fixed to the frame 20, the flexible belt 72 and the first clamping member 73 are pulled to pass through the through hole 713 of the head 722, then the clamping member 73 is held at the through hole 713, the top end 31 of the flexible rod 30 and the expanded head 712 are mounted in a pre-installed position, such as the periphery of the flexible bouncing mat 10. When all of the top ends 31 of the flexible rods 30 are installed in the pre-installed position, the flexible belts 72 are pulled sequentially so that the second clamping member 73 is passed through the through hole 713 and is held at the outlet of the through hole 723, the flexible rods 30 are further bent, and the top ends of the flexible rods 30 are thus mounted in the mounting position, that is, the bottom of the flexible bouncing mat 10.

[0097] Referring to FIG. 14, In general, in order to facilitate transportation, a circle shaped frame 20 is formed with several arc-shape steel pipes 21 which are connected at the beginnings and the tails. The joint 28 of adjacent two of the steel pipes 21 is provided with a first plug-in cylinder 21a and a first plug-in connector 21b which are matched to each other. The first plug-in connector 21b is inserted into the first plug-in cylinder 21a, and the two are fixed and connected by a nail pin. In the structure of the trampoline, the bottom ends of the flexible rods 30 are mounted on the frame 20, and the top ends of the flexible rods 30 are arranged at the periphery of the flexible bouncing mat and thus support the flexible bouncing mat 10. The flexible bouncing mat 10 presses the flexible rods 30 downward so that the flexible rods 30 are bent in the direction to the center of the flexible bouncing mat 10. During the installation of the trampoline, when one of the arc-shape steel pipe 24 is connected to the flexible bouncing mat 10 by a plurality of flexible rods 30, the flexible rods 30 are bent towards the direction of the center of the flexible bouncing mat 10 under the pressure, and the flexible rods 30 pull the arc-shape steel pipe 21 upwardly towards the direction of the center of the flexible bouncing mat 10 so that the middle of each steel pipe 21 is higher relatively to the both of its side ends, which will cause the adjacent steel pipes 21 to separate from each other or collapse from the joint and destroy the stability of the frame 20.

[0098] Referring to FIG. 14 and FIG. 15, the trampoline also includes a plurality of supporting structures 40, which support the frame 20 from underneath of the frame 20, so as to keep the frame maintained above the ground. The supporting structure 40 is provided with a horizontal rod 41, a first vertical rod 42 and a second vertical rod 43 which are symmetrically arranged at two ends of the horizontal rod 41, and a third vertical rod 44 is arranged at the middle of the horizontal rod 41; the first vertical rod 42 and the second vertical rod 43 are respectively inclined to the central direction of the flexible bouncing mat 10, and the top end 421 of the first vertical rod 42 and the top end 431 of the second vertical rod 43 are bent reversely.

[0099] The frame 20 is provided with matching cylinders 29a, 29c which are matched with the top end 421 of the first vertical rod 42 and the top end 431 of the second vertical rod 43 respectively. The installing direction of the matching cylinders 29a, 29c on the frame 20 must be in the extending direction of the top end 421 of the first vertical rod 42 and that of the top end 431 of the second vertical rod 43, so that the installation of the supporting structures 40 can be easily carried out. Further, in order to achieve a stable installation, the matching cylinders 29a, 29c are fixed with the top end 421 and the top end 431 by nail pins 22.

[0100] After the first vertical rod 42 and the second vertical rod 43 are inserted into the matching cylinders 29a, 29c, the first vertical rod 42 and the second vertical rod 43 apply force to the arc-shape steel pipe 21 in the direction opposite to that applied by the flexible rod 30, thereby keeping the arc-shape steel pipe 21 in balance and avoiding the arc-shape steel pipe 21 higher in the middle and lower at its both ends.

[0101] In order to more firmly support the frame 20, a second socket 23 is provided at the joint 28 of the adjacent arc-shape steel pipes 21, the second socket 23 is located in an extending direction at the top end 441 of the third vertical rod 44. The top end 441 of the third vertical rod 44 is inserted into the second socket 23 to support the joint 28 of the arc-shape steel pipes 21 to prevent the adjacent arc-shape steel pipes 21 from falling apart or collapsing from the joint 28.

[0102] A third insert cylinder 46 is provided at the middle of the horizontal rod 41, and the lower end 442 of the third vertical rod 44 is inserted into the third insert cylinder 46, thereby facilitating the disassembly and installation of the third vertical rod 44.

[0103] Referring to FIG. 14 and FIG. 15, the trampoline also includes a number of supporting rods 60 evenly distributed around the flexible bouncing mat 10. The first vertical rod 42 is welded with a second sleeve 45 at its bending position, the installing direction of the cylinder mouth 451 of the second sleeve 45 is located in the extending direction of the bottom end 61 of the supporting rod 60, and the bottom end 61 of the supporting rod 60 is inserted into the second sleeve 45. The cylinder mouth 451 of the second sleeve 45 and the bottom end 61 of the supporting rod 60 are matched to each other. Preferably, the cylinder mouth 451 of the second sleeve 45 is arranged as a flat mouth. For example, the cylinder mouth 451 of the second sleeve 45 is an elliptical flat mouth, and the bottom end 61 of the supporting rod 60 is also elliptical. When the cylinder mouth 451 of the second sleeve 45 is in rectangular shape with long flat port, the bottom end 61 of the support bar 60 is also in rectangular shape with long flat port. The flat port can prevent the supporting rod 60 from rotating, thereby increasing the stability of the supporting rod 60.

[0104] Further, referring to FIG. 16, the bottom of the second sleeve 45 is provided as a cylinder 452 having a diameter slightly smaller than the diameter of the cylinder mouth 451. After the bottom end 61 of the supporting rod 60 is inserted into the cylinder mouth 451, it is also possible to squeeze the bottom end 61 into the cylinder 452 under the action of pressure. Since the diameter of the cylinder 452 is slightly smaller than the diameter of the bottom end 61, the bottom end 61 will be tightly wrapped and the binding force of the two is increased, so that the bottom end 61 cannot be easily removed from the second sleeve 45, thereby further increasing the mounting stability of the supporting rod 60.

[0105] Preferably, the supporting rod 60 is a long arc-shaped rod jointed by two relatively short arc-shaped steel pipes 62; a second plug-in cylinder 621 and a second plug-in connector 622 matched with the second plug-in cylinder 621, are also provided at the joint of the two short arc-shaped steel pipes 62 respectively, and the second plug-in connector 622 is inserted into the second plug-in cylinder 621, and the two are fixed and connected by the nail pin 63. Using two short arc-shaped steel pipes 62 to be jointed to form a long arc-shaped rod is convenient for transport the supporting rods 60. The plug-in manner of connecting the two short arc-shaped steel pipes 62 by the nail pin 63 makes the assembly easy and the structure stable.

[0106] Preferably, the structure of the second plug-in cylinder 621 is the same as that of the mouth of the second sleeve 45. The structure of the second plug-in connector 622 is the same as that of the bottom end 61 of the supporting rod 60, which provide the same function and technical effect as that the bottom end 61, which is not repeated herein.

[0107] Referring to FIG. 17, the trampoline also includes a protective net 80 with its bottom arranged around the flexible bouncing mat 10. The protective net 80 extends upwards, its top of the protective net 80 is supported by a plurality of the supporting rods 60 disposed evenly around the periphery of the flexible bouncing mat 10 and thus forming a closed or semi-closed space for bouncing jump.

[0108] The lower part of the protective net 80 is fixed and installed around the flexible bouncing mat 10 by a plurality of lower net hooks 81 which are hooked through the mesh at the lower part of the protective net 80. In this way, it is very convenient to install and disassemble the protective net 80.

[0109] The lower mesh hooks 81 can be arranged on the buckle structure 70, or on the frame 20, or on the installation structure, or on the periphery of the flexible bouncing mat 10. The position of the lower hooks 81 are designed mainly according to the consideration of the convenience of production and the appearance of the trampoline. Preferably, the lower hooks 81 are provided on the pipe parts 711 of the buckle structures 70. This design enables the lower hooks 81 to be produced by using the same set of molds as for the mounting member 71, no additional molds are needed, no extra production process needs to be added, which brings great convenience to the production.

[0110] It should be understood that the convenience described above can also be obtained by setting the lower hooks 81 on the frame 20 and on the supporting structures 40. But the drawback of this design is that it will increase the length of the protective net and affect the outlook of the trampoline.

[0111] Further, the lower hooks 81 are arranged as facing the center position of the flexible bouncing mat 10 so as to prevent it from hovering other objects or scratching the user.

[0112] An inserting hole 65 is provided at the top end of each supporting rod, a plurality of upper hooks 82 are provided at the upper part of the protective net 80, and the upper hooks 82 are thus inserted into the inserting holes 65 respectively to support the protective net 80. The design makes the installation and disassembly of the upper part of the protective net 80 convenient.

[0113] Referring to FIG. 18, the upper hook 82 is a “7” glyph, L-shaped, U-shaped, V-shaped, and so on. It should be understood that the shape of the upper hook 82 is not limited to the listed categories.

[0114] One end of the upper hook 82 is fixed and connected to the protective net 80, the other end of the upper hook is an inserting end 83, which is inserted into the inserting hole 65. The inserting end 83 can be arranged as a shrapnel and is flexibly matched with the inserting hole 65.

[0115] An inserting member is provided at the top of the supporting rod 60, the inserting member has a sphere 67, a fixing member 68 extending from the bottom of the sphere 67. The fixing member 68 is inserted into the top of the supporting rod 60, and is fixed therein by a screw. The inserting hole 65 is arranged in the sphere 67.

[0116] Referring to FIG. 19, the top of the protective net 80 is also equipped with a basketball frame 85. The basketball frame 85 is fixed on one of the support rods 60.

[0117] The protective net 80 of the trampoline is provided with a zipper door 84. The frame 20 is also provided with a ladder 86.

[0118] Preferably, the lower part of the protective net 80 is connected with the periphery or the bottom of the flexible bouncing mat 10 by zippers.

[0119] The above is a further detailed description of the invention in combination with a specific preferred embodiment, and it can’t be concluded that the specific implementation of the invention is limited to these instructions. For the general technical personnel in the technical field to which the invention belongs, without being separated from the conception of the invention, the architecture form can be flexible and changeable, and a series of products can be derived. If it is just making a number of simple deductions or substitutes should be regarded as falling within the scope of patent protection determined by the claim submitted by the present invention.