Abstract
A fold-up trampoline, having at least three posts arranged in parallel to one another and to a vertical direction (V), wherein a jumping bed is tensioned between the at least three posts, at least three bracing struts which connect a respective other pair of posts arranged next to one another in a peripheral direction (U) of the trampoline and stabilize these posts in a horizontal direction (H), wherein each bracing strut is foldably mounted on both posts arranged next to one another in the peripheral direction (U) and has at least one central joint, which is provided in a central region (B1) of the bracing strut, wherein all the posts arranged next to one another in the peripheral direction (U) can be moved towards one another in order to fold up the trampoline.
Claims
1. A foldable trampoline, comprising: at least three posts arranged parallel to one another and to a vertical direction V, wherein a jumping bed is tensioned between the at least three posts, at least three bracing struts which each connect a different pair of posts adjacent in a circumferential direction U of the trampoline to one another and stabilize said posts in a horizontal direction H, wherein each bracing strut is mounted so as to be foldable on the two posts adjacent in the circumferential direction U and has at least one central joint which is provided in a central region (B1) of the bracing strut, wherein all the posts adjacent in the circumferential direction U can each be moved toward one another in a horizontal direction (H) in order to fold the trampoline, wherein the posts are always parallel to one another during a folding and unfolding movement of the trampoline.
2. The foldable trampoline according to claim 1, wherein at least one central joint and at least two poles are provided, wherein each pole connects a different post to the central joint and is mounted so as to be foldable both on the corresponding post and on the central joint.
3. The foldable trampoline according to claim 1, wherein the jumping bed is tensioned by at least one elastic element, wherein the elastic element is attached to at least one post and/or to at least one bracing strut.
4. The foldable trampoline according to claim 2, wherein the at least one central joint and the tensioned jumping bed have a minimum distance a in the vertical direction V, where a>=20, 30, 40 or 50 cm.
5. The foldable trampoline according to claim 1, wherein at least three securing rods are provided, which each connect a different pair of adjacent posts to one another and stabilize the posts in the horizontal direction H, wherein each securing rod is mounted so as to be foldable on the corresponding post and has at least one central joint, which is provided in a central region of the securing rod and is used for folding the trampoline.
6. The foldable trampoline according to claim 1, wherein the post has an upper section and a lower section, wherein the upper section is arranged above the lower section in the vertical direction V, wherein a section joint is provided, via which the upper section can be pivoted relative to the lower section.
7. The foldable trampoline according to claim 5, wherein a jump region for the user is provided above the jumping bed in the vertical direction V, wherein the at least one central joint is provided below the jumping bed counter to the vertical direction V and/or the securing rods are provided above the jumping bed in the vertical direction V.
8. The foldable trampoline according to claim 1, wherein a separate tensioning apparatus is provided for tensioning the jumping bed, wherein the tensioning apparatus acts independently of and/or dependent on the unfolding of the trampoline.
9. The foldable trampoline according to claim 2, wherein joint securing means are provided on the central joints of the bracing struts and/or of the securing rods in order to fix the central joints.
10. The foldable trampoline according to claim 1, wherein a tensioner, designed as a motor or a crank, is provided for operating at least a part of the folding movement and/or the unfolding movement.
11. The foldable trampoline according to claim 1, wherein a first Bowden cable system is provided, by which the unfolding of the trampoline can be operated, and/or a second Bowden cable system is provided, by which the folding of the trampoline can be operated.
12. The foldable trampoline according to claim 11, wherein the first Bowden cable system and/or the second Bowden cable system are guided at least partially within a post and/or a pole and/or a securing rod.
13. The foldable trampoline according to claim 11, wherein at least one guide element is movably mounted in a bearing device within a post and/or a pole and/or a securing rod, wherein the first Bowden cable system and/or the second Bowden cable system are guided via the guide element or are fixed to the guide element.
14. The foldable trampoline according to claim 11, wherein the first Bowden cable system has an angled pole between a post and a bracing strut, a pole and/or a securing rod, which angled pole, during unfolding of the trampoline, exerts a force in such a way that the bracing strut, the pole and/or the securing rod moves to the position in the unfolded state.
15. The foldable trampoline according to claim 1, wherein the trampoline can be unfolded and/or folded via an exclusively translational movement of each post towards a central axis M of the trampoline in each case.
16. A method for folding a foldable trampoline according to claim 11, comprising the steps of: operating the second Bowden cable system and at least indirectly bring about a folding of the central joints of the bracing struts and/or of the central joints of the securing rods and/or of the poles, wherein all the posts adjacent in the circumferential direction U move toward one another.
17. The method for folding a foldable trampoline according to claim 16, wherein the second Bowden cable system is operated and at least indirectly causes the upper section and the lower section of the posts of the unfolded trampoline to be pivoted from a coaxial position into a position in which they form a smallest angle (α) of less than 180°, 90°, 45°, 20°, 10° or 5°.
18. A method for tensioning a jumping bed of a foldable trampoline according to claim 8, comprising the steps of: tensioning jumping bed via the separate tensioning apparatus during or after the unfolding of the foldable trampoline.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0078] Further advantages and details of the invention are explained in the claims and in the description and illustrated in the drawings. Therein:
[0079] FIG. 1 shows a perspective view of a foldable trampoline;
[0080] FIG. 2 shows a front view of two adjacent posts with a safety net;
[0081] FIG. 3 shows a front view of a bracing strut with a joint;
[0082] FIG. 4 shows a front view of a bracing strut with two joints;
[0083] FIG. 5a shows a plan view of the trampoline in the unfolded state;
[0084] FIG. 5b shows a plan view of the trampoline in the folded state;
[0085] FIG. 6a shows a front view of two posts of an unfolded trampoline;
[0086] FIG. 6b shows a front view of two posts of a folded trampoline;
[0087] FIG. 7 shows an embodiment of a post with two wheels;
[0088] FIG. 8 shows an embodiment of a pole with V-shaped foot;
[0089] FIG. 9a shows a section through a post with a movably mounted guide element of an unfolded trampoline;
[0090] FIG. 9b shows a section through a post with a movably mounted guide element of a folded trampoline;
[0091] FIG. 10a shows a section through a post with an alternative embodiment of a guide element of an unfolded trampoline;
[0092] FIG. 10b shows a section through a post with an alternative embodiment of a folded trampoline;
[0093] FIG. 10c shows a cross section of a reinforced post in the region of a slot;
[0094] FIG. 11a shows a front view of a post with an alternative embodiment of an unfolded trampoline;
[0095] FIG. 11b shows a front view of a post with an alternative embodiment of a folded trampoline;
[0096] FIG. 12 shows a plan view of a protective cover;
[0097] FIG. 13 shows a front view of a safety net with a protective cover;
[0098] FIG. 14 shows a plan view of an exemplary embodiment of a rectangular trampoline with two central joints.
[0099] FIG. 15a shows a section through a bracing strut on a post with an embodiment of the first Bowden cable system in the at least partially folded state;
[0100] FIG. 15b shows a section through a bracing strut on a post with the embodiment of the first Bowden cable system in the unfolded state;
[0101] FIG. 16a shows an alternative embodiment of the trampoline in a front view of two posts of an unfolded trampoline;
[0102] FIG. 16b shows an alternative embodiment of the trampoline in a front view of two posts of a folded trampoline.
DETAILED DESCRIPTION OF THE INVENTION
[0103] A foldable trampoline 1 has three posts 2 in FIG. 1. The posts 2 are parallel to one another and to a vertical direction V. Each post 2 has an upper section 2.3 and a lower section 2.4, which are each connected to one another in a foldable manner via section joints 2.5. The posts 2 each have a wheel 19 which allows the posts to be movable in a horizontal direction H. The wheels 19 have a parking brake 21.
[0104] Furthermore, three poles 7 are provided, which each connect one of the posts 2 to a central joint 6. The poles 7 are each fastened to the posts 2 and the central joint 6 in a foldable manner. In this context, edge joints 7.1 are provided which allow the flaps to be folded. The edge joints 7.1 can be designed as hinges. Each of the poles has two of the edge joints 7.1 at their ends.
[0105] Three bracing struts 5 are provided in the vertical direction V above the poles 7. The bracing struts 5 extend in a horizontal direction H. Each of the bracing struts 5 has a central joint 5.1 in its central region B1. A post joint 5.3 is provided in the form of a hinge at the two edges of a bracing strut 5, whereby the bracing strut 5 is mounted so as to be foldable on the post 2. The post joints 5.3 do not lie in the central region B1.
[0106] A jumping bed 8 is tensioned in a horizontal plane between the bracing struts 5. An elastic element 11, which is designed as a cable, is fastened to the jumping bed 8 and the bracing struts 5 and tensions the jumping bed 8. In addition, a tensioning apparatus 9 is provided, which is designed here as a crank and via which the elastic element 11 can additionally be tightened. A jump region 12 for the user is located in the vertical direction above the jumping bed 8 and between the posts 2.
[0107] Above the bracing struts 5 in the vertical direction V, securing rods 10 are provided, each of which has a joint 10.1 in a central region 82. The securing rods 10 are fastened to the posts 2 so as to be foldable, wherein post joints 10.2 are provided on the two edges of a securing rod 10. The post joints 10.2 do not lie in the central region B2.
[0108] A tensioner 17 is provided in the form of a motor on the central joint 6. The tensioner 17 operates a first Bowden cable system 3 and a second Bowden cable system 4. The unfolding of the trampoline 1 is brought about with the aid of the first Bowden cable system 3. The second Bowden cable system 4 brings about the folding of the trampoline 1. A part of the first Bowden cable system 3 and of the second Bowden cable system 4 extends outside the post 2 and the poles 7 so as to be visible in the surroundings. Slots 20 in the posts 2 make it possible for a part of the first Bowden cable system 3 and of the second Bowden cable system 4 to run within the posts 2, the poles 7 and the securing rods 10. The course of the one part of the first Bowden cable system 3 and of the second Bowden cable system 4 within the posts 2 is illustrated by way of example with the aid of the dashed line. The first Bowden cable system 3 and the second Bowden cable system 4 run per se next to one another and independently of one another through the posts 2 and the poles 7.
[0109] The adjacent posts 2 in FIG. 2 have a foam covering 2.1. Likewise, the securing rod 10 has a foam covering 10.3 and the bracing strut 5 has a foam covering 5.2. A safety net 10.4 is tensioned between the bracing strut 5 and the securing rod 10. The foam coverings 5.2, 10.3 and the safety net 10.4 are used for the safety of the user.
[0110] In FIG. 3, the post joints 5.3 of a bracing strut 5 are fastened directly to the adjacent posts 2 and a central joint 5.1 is provided. A joint securing means 13 via which the angle of the central joint 5.1 can be fixed is disposed on the central joint 5.1.
[0111] In FIG. 4, the post joints 5.3 are not provided directly on the adjacent posts 2, but offset in or counter to a horizontal direction H. In addition, two central joints 5.1 are provided. A securing tensioning cable 9.1 is guided through the bracing struts 5. The securing tensioning cable 9.1 can be tensioned by means of the tensioning apparatus 9, whereby the jumping bed 8 can be tensioned. The securing tensioning cable 9.1 can also fix the joints.
[0112] The bracing strut in each of FIGS. 3 and 4 is not unfolded because it is angled downward counter to the vertical direction V.
[0113] FIGS. 5a and 5b show a plan view of a trampoline 1 with eight posts 2, of which only the lower section 2.4 is shown, wherein in particular the post joints 5.3, 10.2 are not shown so as to provide a clearer representation. The central joints 5.1 of the bracing struts 5 and the securing rods 10 can be seen in the representations. The central joint 6 is concealed counter to the vertical direction V below a cladding 18 and is thus not visible. FIG. 5b also shows the central axis M of the trampoline 1. The central axis M is parallel to the vertical direction V. A circumferential direction U runs in a horizontal plane about the central axis M.
[0114] FIG. 5a shows the trampoline 1 unfolded. FIG. 5b shows the trampoline 1 folded. The distance in the circumferential direction U of adjacent posts of a folded trampoline is significantly less than the distance in the circumferential direction U of adjacent posts of an unfolded trampoline. During folding, the posts thus move toward one another and in each case move radially onto the central axis M in a horizontal direction H. During unfolding, the movement is reversed accordingly.
[0115] FIGS. 6a and 6b show a detail of the trampoline 1 with two posts 2 in a front view. FIG. 6a also shows the smallest distance a in the vertical direction V between the central joint 5.1 and the central joint 6.
[0116] In FIG. 6a the trampoline 1 is unfolded, and the trampoline 1 in FIG. 6b is folded. The edge joints 7.1, with which the poles 7 are mounted so as to be foldable on the adjacent posts 2 and the central joint 6, allow the poles 7 to fold upwards in the vertical direction V during folding, with the adjacent posts 2 moving towards one another. Accordingly, the post joints 10.2 of the securing rod 10 and the post joints 5.3 of the bracing strut 5 make it possible for these to fold away downwards in each case counter to the vertical direction V. During unfolding, the movement is reversed accordingly.
[0117] In the unfolded trampoline 1, the section joint 2.5 is unfolded and the upper section 2.3 and the lower section 2.4 of the post 2 are coaxial. If the trampoline 1 is folded in, the upper section 2.3 and the lower section 2.4 are angled with respect to one another and form a smallest angle α of 45°. However, it is also possible for the angle α to be smaller in order to fold the trampoline as compactly as possible. The trampoline is reduced in height. The unfolding movement proceeds as indicated by the arrow in a horizontal direction H radially away from the central axis, which in FIG. 6b lies behind the posts 2 in the plane of the image, such that the securing rods 10 are guided in the plane of the image in front of the posts 2.
[0118] A smallest angle β between a bracing strut and the post is about 30°. However, it can also be smaller; the smaller the angle, the more compact the trampoline. A smallest angle γ between a pole and the post is also about 30°. This angle can also be smaller.
[0119] The movement of the posts 2 during folding or unfolding is a translational movement. The posts 2 move toward one another or away from each other in a horizontal direction H. The posts 2 do not move in a vertical direction V. During this movement, the posts 2 always remain parallel. This movement is made possible by the pivot axis 5.4 of the central joint 5.1 as well as the pivot axes 5.5 of the edge joints 5.3. These pivot axes 5.4, 5.5 of a connecting strut 5 are each parallel to one another and orthogonal to the connecting strut 5. The same applies to the pivot axis 10.5 of the central joint 10.1 and the pivot axis 10.6 of the post joint 10.2. Each pole 7 has two edge joints 7.1, wherein an edge joint 7.1 is provided between the pole 7 and the post 2 and an edge joint 7.1 is provided between the pole 7 and the central joint 6. The pivot axes 7.3 of the edge joints 7.1 are each orthogonal to the pole 7 and parallel to one another.
[0120] In FIG. 7, the post has a base 2.2. The base 2.2 is axially wider than the upper section 2.3 and the lower section 2.4 of the post 2 so that there is space for two wheels 19. The base 2.2 has two contact regions 2.6 for edge joints 7.1. In FIG. 8, the pole 7 can have a V-shaped foot 7.2. Two edge joints 7.1 are provided at the two ends of the V-shaped foot 7.2. Between the legs of the V-shaped foot 7.2, the second Bowden cable system 4 is exposed over a length L until it is received again in the post 2 via the slot 20 shown in FIG. 7, which also has the length L in the axial direction. Both measures each lead to additional stability of the trampoline 1, in particular if all the posts 2 of a trampoline 1 have the base 2.2 and each pole 7 has a V-shaped foot 7.2.
[0121] FIGS. 9a and 9b show a section through a post 2 having a slot 20. The post 2 is partially hollow. A guide element 14, designed as a roller, is provided within the post 2, via which guide element a part of the second Bowden cable system 4 is guided. The guide element 14 is mounted in a bearing device 16. In addition, a restoring element 15, designed as a spring, is provided, which pulls the guide element 15 into a rest position. An edge joint 7.1, in the form of a hinge, of the pole 7 is fastened to the post 2. A part of the first Bowden cable system 3 is also shown.
[0122] FIG. 9a shows the unfolded trampoline 1 and FIG. 9b shows the folded trampoline 1. In the case of the unfolded trampoline 1, the guide element 14 is in the rest position, into which it is driven by the restoring element 15. There is no tension on the second Bowden cable system 4. During folding, tension is applied to the second Bowden cable system 4, the guide element 14 is moved out of the rest position along the bearing device 16 and the restoring element 15 is tensioned. Due to the movement of the guide element 14 along the bearing device 16, the second Bowden cable system 4 is deflected further upward in the vertical direction V and the exposed part of the second Bowden cable system 4 is reduced. When tension is taken from the second Bowden cable system for unfolding, the restoring element 15 causes the guide element 14 to move back into the rest position. The exposed part of the Bowden cable system is thus also minimized for the unfolded trampoline 1.
[0123] Another exemplary embodiment is shown in FIG. 10a. The post 2 is connected to a pole 7 via an edge joint 7.1. The edge joint 7.1, and thus the trampoline 1, is unfolded. The second Bowden cable 4 has a first Bowden cable section 4.1 and a second Bowden cable section 4.2. The first Bowden cable section 4.1 and the second Bowden cable section 4.2 are each fixedly connected to the guide element 14 designed as a piston and are each tensioned. Owing to the tension of the first Bowden cable section 4.1, the guide element 14 is pulled downward within the bearing device 16 counter to the vertical direction V and is in the lowermost position within the bearing device 16.
[0124] In FIG. 10b, the edge joint 7.1 and thus the trampoline 1 are folded. The first Bowden cable section 4.1 has been shortened to operate the folding. Owing to this shortening, the guide element 14 has been pulled upward in the vertical direction V and is in the uppermost position in the guide element 16.
[0125] In FIG. 10c, the post 2 has an oval cross section Q, thus an axial increase in the post width in the region of the slot 20. The bearing device 16 is formed by the post itself, such that the guide element 14 is guided in the interior of the post 2 from the post walls.
[0126] A further aspect of this embodiment is shown in FIGS. 11a and 11b. As before, the post 2 has the upper section 2.3 and the lower section 2.4. The two sections 2.3, 2.4 are connected so as to be pivotable against one another via the section joint 2.5. If, as shown in FIG. 11a, the guide element 14 is in the lowermost position, the second Bowden cable section 4.2 is tensioned and the upper section 2.3 and the lower section 2.4 lie coaxially. If the guide element 14 in FIG. 11b is in the uppermost position in the bearing device 14, the second Bowden cable section 4.2 is relaxed and the upper section 2.3 and the lower section 2.4 fold against one another. Conversely, the unfolding of the upper section 2.3 with respect to the lower section 2.4 is brought about by tensioning the second Bowden cable section 4.2. In FIG. 12, a protective cover 22 is provided which covers the elastic element 11. In addition, retaining elements 22.2, which are formed as buttons, are attached to the protective cover 22. Retaining means 22.1 are provided on the bracing strut 5, which is rounded in this case and constitutes a circular arc. The retaining means 22.1 are formed as button holes. Retaining means 22.1 are also provided on the jumping bed and are concealed here below the protective cover 22.
[0127] The protective cover 22 is fastened to the safety net 10.4 in FIG. 13.
[0128] FIG. 14 shows a further exemplary embodiment of the foldable trampoline 1 with two central joints 6.
[0129] FIG. 15a shows a further development of the first Bowden cable system 3. This has an outer joint 3.11 with a pivot axis 3.12, which is provided on at least one post 2. An angled pole 3.9 is pivotably mounted via the outer joint 3.11 on the bracing strut 5 by means of a guide joint 3.3 with a pivot axis 3.13. The pivot axes 3.12, 3.13 are parallel to one another and each orthogonal to the angled pole 3.9. The guide joint 3.3 is provided within the bracing strut 5 and placed on a guide 3.2. The guide joint 3.3 can be moved on the guide 3.2 towards the post 2 or away from the post 2. The Bowden cable system 3 also has a Bowden cable 3.10. The Bowden cable 3.10 is also provided within the bracing strut 5 and initially engages the guide joint 3.3. From there, the Bowden cable 3.10 is guided via a deflection element 3.1, designed as a deflection wheel, which is disposed in the vicinity of the post 2. There, the Bowden cable 3.10 is deflected and runs further away from the post 2 to the central axis M.
[0130] In FIG. 15a, the trampoline 1 is folded as far as possible. By pulling the Bowden cable 3.10 in the pull direction 3.5, the trampoline 1 is unfolded and, in the unfolded state, is stabilized by pulling on the Bowden cable 3.10 so that the trampoline 1 is stable. For unfolding, the guide joint 3.3 is moved along the guide 3.2 by means of the pull on the Bowden cable 3.10, such that it comes closer to the post 2. This leads to the angled pole 3.9 pivoting in the direction of the post 2 and thus pressing the bracing strut 5 downward. FIG. 15b shows the trampoline 1 at the end of the unfolding movement in the unfolded state.
[0131] In addition, a securing system 3.4 is provided, i.e. a bolt, a pin or a latching system, by means of which the guide joint 3.3 can be fixed on the guide 3.2, in particular in the unfolded state of the trampoline 1, so that a movement of the guide joint 3.3 on the guide 3.2 is no longer possible. In this way, the trampoline 1 is additionally secured, since an undesired pivoting of the bracing strut 5, in particular a folding, is prevented.
[0132] A corresponding further development of the first Bowden cable system 3 can be provided in each of the bracing struts 5. In FIG. 15b, the corresponding Bowden cables 3.10 are shown in simplified form by means of the dashed lines. The Bowden cables 3.10 are fixed to a junction device 3.6. A tension cable 3.7 extends from the junction device 3.6 and is guided to a tensioning crank 3.8. A corresponding pull by means of the tensioning crank 3.8 tensions the individual Bowden cables 3.10 together accordingly. The tensioning crank 3.8 can be attached to a post 2.
[0133] Alternatively, this further development can also be configured on a pole 7 or a plurality of poles 7. Accordingly, the further development can also be configured on a securing rod 10.
[0134] As an independent aspect, the post 2 has a telescopic system 24. The post 2 is in two parts in FIG. 15a. After unfolding, the first part of the post 2, which is the upper part in the plane of the paper, can be plugged together by means of the telescopic system 24 into the second part of the post 2, which is the lower part in the plane of the paper.
[0135] FIGS. 16a and 16b correspond substantially to FIGS. 6a and 6b. In a departure from this, a joint securing means 13 is provided in the form of a foot 13. As shown in FIG. 16a, in the unfolded state of the trampoline 1, the foot rests on a surface 23 so that when the central joint 5.1 is loaded, for example during jumping activity, the central joint 5.1 cannot be deflected towards the surface 23. In this exemplary embodiment, the bracing struts 5 are mounted in such a way that, when the trampoline is folded together, the foot 13 lifts off the surface 23 and the corresponding pivoting movement of the bracing struts 5 is possible.
