Abstract: A trampoline comprises a flexible mat, a plurality of resiliently flexible rods each having an upper end retained in the flexible mat, and a base frame arranged to retain the lower ends of the flexible rods. The base frame comprises for each rod an aperture through an upper side of the base frame into the interior of the tubular frame, and a formation into the interior of the tubular base frame from the lower side of the base frame and spaced laterally from the aperture, which may be formed by deforming material of the underside wall of the base frame into the interior of the base frame, for receiving the lower end of the flexible rod.

Abstract: A trampoline board includes a resilient body with a foam core. At least one flex zone (e.g., a channel) which acts as a living hinge extends from a first lateral edge to a second lateral edge to facilitate bending to conform to the shape of a depressed trampoline surface. Sandal-like trampoline board bindings are threadedly coupled to inserts molded into the resilient body. Each binding includes a shock absorbing midsole and is devoid of any potentially harmful structures that extend above the ankle of a user, such as the molded support behind the heel characteristic of snowboard bindings. Adjustable cushioned straps secure the sandal-like trampoline board bindings to a user's feet. The insert pack includes a base with a plurality of parallel threaded shanks extending perpendicularly therefrom.

Abstract: A trampoline is disclosed herein. An embodiment of the trampoline has a first end and a second end. A first side and a second side extend between the first end and the second end. A trampoline mat at least partially covers the area between the first end, the second end, the first side, and the second side. The first side is at least partially wave-shaped.

Abstract: A physical training system wherein power yoga asanas are executed on the resilient mat of a mini-trampoline rebounder, thereby increasing flexibility and balance via incorporation of a challenging and unstable foundational surface, and wherein posture intensity is selectively increased by utilization of on-board resistance cords, either for holding in an isometric contraction, or by performing repetitions.

Abstract: A trampoline (10) includes a bed (14), a base frame (12), a bed suspension assembly (16) that resiliently couples the bed (14) to the base frame (12), and a plurality of legs (20) that are connected to the base frame (12) so as to maintain the base frame (12) above a surface (36). The base frame (12) includes a first side frame (22), a second side frame (24), a first end frame (26), and a second end frame (28). The plurality of legs (20) includes (i) a first leg (20A) that is secured to the first side frame (22) and the first end frame (26), (ii) a second leg (20B) that is secured to the first side frame (22) and the second end frame (28), (iii) a third leg (20C) that is secured to the second side frame (24) and the second end frame (28), and (iv) a fourth leg (20D) that is secured to the second side frame (24) and the first end frame (26).

Abstract: A fence surrounds a trampoline and extends above the rebounding surface, reducing the risk of injury. Shock absorption is aided by a support system of independent poles. Variable placement net fasteners also are detailed.

Abstract: Trampolines are disclosed herein. An embodiment of a trampoline includes a first support member having a plurality of portions and a second support member having a plurality of portions. A first support member first portion is aligned with a second support member second portion wherein the area between the first support member first portion and the second member first portion is a first plane. A first support member second portion is aligned with a second support member second portion wherein the area between the first support member second portion and the second support member second portion is a second plane. A single piece of first material substantially covers the first plane and the second plane. The first plane intersects the second plane at an angle less than one hundred eighty degrees.

Abstract: A trampoline exercise system that is designed to show an avatar of a user, which is jumping on a trampoline. The exercise system includes a computer module, a trampoline configured to provide a platform for a user to perform exercises thereon, and a sensor module designed to sense movements of a user performed on the trampoline. The sensor module provides information that is received by the computer module that controls the display of a users' avatar on a video monitor in response to the users' motion on the trampoline. Several types of sensor may be used to sense the movement of the user, including body mounted sensors, trampoline mounted sensors, and remote viewing sensors.

Abstract: A trampoline assembly (10) for supporting a user above a support surface (30) comprises a bed (12); a base frame (14); a plurality of resilient members (16); and a leg assembly (20). The plurality of resilient members (16) connect the bed (12) to the base frame (14). The leg assembly (20) supports the base frame (14) and the bed (12) above the support surface (30). Additionally, the leg assembly (20) includes (i) a plurality of legs (26) that are connected to the base frame (14), each leg (26) including a first leg end (26F) and a spaced apart second leg end (26S) that are each connected to the base frame (14), and (ii) one or more stabilizers (28) that are connected to and extend between one of the legs (26) and at least one of an adjacent leg (26) and the base frame (14).

Abstract: A soft edged trampoline includes a flexible mat supported from a base frame by a plurality of resiliently flexible rods. Each rod has an enlarged upper end. A plurality of fittings coupled to the mat about the periphery of the mat each include a socket cavity which receives the enlarged upper end of a flexible rod, so that the upper ends of the flexible rods are pivotally connected to the periphery of the mat.

Abstract: A trampoline provides higher performance and greater shock absorption capability by utilizing pairs of springs to connect the rebounding mat to the supporting frame. The springs in each pair are coupled to a common junction on the periphery of the rebounding mat, being disposed vertically with respect to each other. The upper spring in each pair is directly connected to the rebounding mat and the trampoline frame to initially to tension the mat in the equilibrium position. The lower spring in each pair is coupled to the frame and then to rebounding mat via a linkage arm such that it comes substantially under tension only as the corresponding upper spring is stretched. Depending on the level of impact force on the trampoline mat both springs extend, such that their combined stored energy propels the user upward on the return bounce. However, as each spring pair engages in stages the shock of the users initially landing is gradually absorbed.

Abstract: A trampoline has a trampoline bed with a bounding surface, and a trampoline bed bounding surface. A trampoline frame holds the bounding surface substantially horizontally to provide an area for a user. A balloon coupler is attached to the trampoline. A bounce module is mounted underneath the trampoline bed bounding surface. The bounce module is placed to receive motion from a user. The user activates a mode of the bounce module during jumping. A conduit hose is attached to the balloon coupler. A one-way valve is configured to regulate flow only to the balloon, and blocking any flow away from the balloon. A pump may pump water or air to the balloon. A balloon is attached to the balloon coupler so that the balloon is in fluid communication with the conduit hose.

Abstract: A recreational structure, such as a trampoline frame, can be quickly and reliably assembled using a coupling member generally having a “T” configuration. A first arm member and a second arm member are disposed in an opposite relationship with each other. The first and second arm members each receive one end of a horizontal frame member of the recreational structure. The third arm member includes flange members that receive one end of a vertical frame member of the recreational structure and one end of a vertical pole member of, for example, a safety enclosure.

Abstract: An exerciser including a movable body support mounted on an exerciser flame for movement along tracks provided by the frame. A movable foot support extends from the exerciser frame. The movable foot support is adapted to be engaged by the user's feet to absorb the energy of movement in a first direction and to provide the user with a bouncing movement, which the user may translate into a movement of the movable body support in the opposite direction. The movable foot support may be provided as an attachment and retrofitted to existing exercisers. The exerciser may include a resilient resistance system coupled to the movable body support and a set of pull lines with user grips trained over pulleys carried by the exerciser frame. Also disclosed are methods for enabling users to exercise.

Abstract: Trampolines are disclosed herein. An embodiment of a trampoline includes a first support member having a plurality of portions and a second support member having a plurality of portions. A first support member first portion is aligned with a second support member second portion wherein the area between the first support member first portion and the second member first portion is a first plane. A first support member second portion is aligned with a second support member second portion wherein the area between the first support member second portion and the second support member second portion is a second plane. A single piece of first material substantially covers the first plane and the second plane. The first plane intersects the second plane at an angle less than one hundred eighty degrees.

Abstract: A soft edged trampoline includes a flexible mat supported from a base frame by a plurality of resiliently flexible rods. Each rod has an enlarged upper end. A plurality of fittings coupled to the mat about the periphery of the mat each include a socket cavity which receives the enlarged upper end of a flexible rod, so that the upper ends of the flexible rods are pivotally connected to the periphery of the mat.

Abstract: A fence surrounds a trampoline and extends above the rebounding surface, reducing the risk of injury. Shock absorption is aided by a support system of independent poles, linked at their tops by a flexible strap or line which is attached directly to a protective cap at the top of each pole. Also disclosed are a method and apparatus for attaching a pad to a trampoline frame either with or without an enclosure.

Abstract: A projectile launcher for launching a projectile is provided. The projectile launcher is arranged to be connected to a trampoline having a frame and a jumping mat, the jumping mat connected to the frame by resilient members, the projectile launcher including a propulsion element adapted to provide a motive force to propel a projectile and an energy extraction element arranged to be connected to a trampoline and to extract energy from the action of a user bouncing on the trampoline to provide power to the propulsion element.

Abstract: A trampoline arena system having a reduced non-reboundable area includes a mattress, an outer support element substantially surrounding and connected to an outer edge of the mattress, and an inner support element providing support to the mattress at a location interior from the outer edge of the mattress. The inner support element may be completely and contiguously surrounded by the mattress. The trampoline arena system may include first and second support members in a parallel spaced relationship, a first mattress joined to the first support member by a first plurality of springs such that at least one of the first mattress and the first plurality springs passes under the second support member, and a second mattress joined to the second support member by a second plurality of springs such that at least one of the second mattress and the second plurality of springs passes under the first support member.

Abstract: A trampoline includes a support frame, two pivot mechanisms mounted on the support frame, a bed surrounded by the support frame and a plurality of elastic members biased between the support frame and the bed. The support frame includes a first side rail, a second side rail, a third side rail and a fourth side rail. Thus, the first side rail and the second side rail are moved to abut the third side rail and the fourth side rail to fold the support frame at a first stage, while the first side rail and the fourth side rail are moved toward the second side rail and the third side rail by pivoting the pivot mechanisms to fold the support frame at a second stage so that the support frame is folded in a two-stage manner to reduce the volume of the trampoline largely.

Abstract: This invention concerns a trampoline comprising a flexible bounce mat connected to a frame by one or more resilient members such that the flexible bounce mat is held above the ground in tension. A plurality of support poles is arranged, in use, to extend upwardly from the frame and a surround of flexible material is arranged to be connected to the support poles to extend around and above the flexible bounce. An interface between the flexible bounce mat and surround may be inward of the resilient members. A cover comprising a sheet of material may extend from the surround over the resilient members to the frame. The trampoline may be without foam/padding material over at least some of the resilient members.

Abstract: A trampoline includes a frame and a jumping bed which preferably has hook elements on its underside. The jumping bed is connected to the frame via a plurality of annular strap sections, which each extend at least partially around the frame and are inserted into the hook elements. The hook elements have a first receiving section and a second receiving section. These are arranged separated from one another in such a way that the two loop ends of the strap section, which are produced by the looping of the strap section around the frame and are inserted into the hook element, do not, or substantially do not, come in contact with one another. This structure considerably extends the life in comparison with conventional trampolines.

Abstract: A wheel assembly for attachment to the leg of a trampoline has means for moving the wheel from a first raised position where the wheel is not supporting the trampoline leg above the ground, to a second position where the wheel is supporting the trampoline leg above the ground. In that way the trampoline can be rolled on wheels without having to subsequently remove the wheel assemblies for storage.

Abstract: Embodiments of hollow generally T-shaped couplers suitable for coupling respective ends of two tubular members to an upright member for a trampoline support are disclosed. Neither manufacture of the coupler nor the manner of its coupling between the tubular members and the upright member requires welds. The coupler has a hollow cross piece for coupling with the respective ends of the two tubular members. It also has a hollow upright piece extending from an underside of and intersecting the cross piece that receives in female fashion a male end of the upright member. Both the underside of the cross piece and sides of the upright piece are of split form along their respective lengths. The upright piece is provided with location regions that cooperate with corresponding location regions on the male end of the upright member to locate the upright member longitudinally of the upright piece.

Abstract: A trampoline has an enclosure which includes a wire ring; a plurality of connectors connected to the wire ring; and a plurality of support poles. The support poles have a top end. The support poles have a top bend that bends inward at the top end. The wire ring is substantially inflexible during trampoline use. The trampoline also includes trampoline frame. The plurality of support poles are rigidly connected to the trampoline frame. A trampoline enclosure net is suspended from the wire ring at an upper portion of the trampoline enclosure net. A trampoline mat is included and the trampoline enclosure net is bounded by the trampoline mat at a lower portion of the trampoline enclosure net. A bounding surface is supported by a plurality of springs connecting between the bounding surface and the trampoline frame.

Abstract: An enclosure assembly (22) for use with a trampoline assembly (10) comprises a plurality of support arches (32) including at least a first support arch (32A) and a second support arch (32B) that are hingably secured to a base frame (14). The second support arch (32B) overlaps the first support arch (32A) and is selectively secured to the first support arch (32A). The plurality of support arches (32) can further include a third support arch (32C) and a fourth support arch (32D) that are hingably secured to the base frame (14). The third support arch (32C) and the fourth support arch (32D) overlap and are selectively secured to at least one of the other support arches (32). The plurality of support arches (32) are selectively movable between an upright configuration and a collapsed configuration. When the first support arch (32A) is in the upright configuration, one or more of the other support arches (32B-32D) are inhibited from being moved from the upright configuration to the collapsed configuration.

Abstract: A rebounder comprising an encompassing frame has a platform suspended on the frame. The platform has a substantially rigid base and a pad of resilient material is secured on the base. A vertical handhold frame may have a directly attached handhold or a rotating handhold, which may be attached by elastic connections.

Abstract: A trampoline provides higher performance and greater shock absorption capability by utilizing pairs of springs to connect the rebounding mat to the supporting frame. The springs in each pair are coupled to a common junction on the periphery of the rebounding mat, being disposed vertically with respect to each other. The upper spring in each pair is directly connected to the rebounding mat and the trampoline frame to initially to tension the mat in the equilibrium position. The lower spring in each pair is coupled to the frame and then to rebounding mat via a linkage arm such that it comes substantially under tension only as the corresponding upper spring is stretched. Depending on the level of impact force on the trampoline mat both springs extend, such that their combined stored energy propels the user upward on the return bounce. However, as each spring pair engages in stages the shock of the users initially landing is gradually absorbed.

Abstract: A recreational structure, such as a trampoline frame, can be quickly and reliably assembled using a sleeve-joint coupling having a “T” configuration. A first arm member and an aperture that is formed in the sleeve-joint coupling are disposed in an opposite relationship. A second arm member and a third arm member are disposed in an opposite relationship with each other. The first arm member receives one end of a vertical frame member of the recreational structure, while the aperture receives one end of a vertical pole member of, for example, a safety enclosure. The second and third arm members each receive one end of a horizontal frame member of the recreational structure. The vertical pole member extends through the sleeve-joint coupling into an inner portion of the vertical frame member received by the first arm of the sleeve-joint coupling.

Abstract: A recreational structure comprises a rebounding-surface frame forming a closed shape, and at least one panel disposed between the rebounding-surface frame and a support surface. The at least one comprises a horizontal edge, and at least a portion of the top horizontal edge of at the least one panel is coupled to at least a portion of the rebounding-surface frame. In one exemplary embodiment, at least a first and a second panel each comprise first and second vertical edges and a horizontal edge. The first vertical edge of the first panel is coupled to a second vertical edge of the second panel. At least a portion of the top horizontal edge of at least one of the first and second panels is coupled to at least a portion of the rebounding-surface frame.

Abstract: A trampoline apparatus with an attached safety net for use by young children of toddler age that provides them with the ability to stand on the apparatus and bounce up and down on their feet is herein disclosed. The apparatus does not allow a child to flip or jump through the air as do conventional trampolines. The safety bounce apparatus is approximately two (2) to three (3) feet in diameter and is supported with a bouncing surface six (6) inches from the floor. The apparatus provides the child with grasping handles and safety net sides being affixed thereto a plurality of vertical extension rods attached to a padded upper ring. An entry/exit opening is provided in the vertical configuration and is secured with hook-and-loop fastening means. The complete apparatus may be disassembled for storage and transporting and includes a handled carrying case.

Abstract: A trampoline swing has a swing assembly, a trampoline assembly and a trampoline to swing connection member connecting the horizontally oriented trampoline frame to a trampoline connection end of the swing assembly. The trampoline swing has a top bar having a pair of apexes, namely a left apex and a right apex. The left apex is at a left side of the swing assembly and the right apex is at the right side of the swing assembly. There are four main body leg supports, namely a front left leg support, a front right leg support, a rear left leg support, and a rear right leg support. The left apex receives the front left leg support and the rear left leg support. The right apex receives the front right leg support and the rear right leg support. A plurality of swing connectors are mounted on the top bar.

Abstract: A trampoline and enclosure with an improved ingress and egress is provided. The enclosure is made from a flexible material with an arched entry way. The entry way is arched, or some other shape (symmetrical or asymmetrical), so that when it is in the open position, the material closing the arch falls out of the way facilitating ingress and egress to the jumping chamber.

Abstract: Embodiments of the invention are directed to trampolines and component parts including a frame assembly to fold a fixed or foldable trampoline from an expanded state to a collapsed state or vice-versa. In one embodiment, a frame assembly includes a base frame member, two peripheral frame members and two connecting members connecting the two peripheral frame members to the base frame member. The two peripheral frame members are also connected to a center joint which may slide up and down a center frame post via a folding mechanism which may include a crank shaft and an elongated threaded member. In some embodiments, the frame assembly may include hydraulics and the two peripheral frame members may be off-set relative to one another. Embodiments of component parts for the trampoline may also include a plurality of net frame members, a foldable ladder, a wheeled support and a frame pad.

Abstract: A trampoline comprising a flexible mat (3) and a plurality of springs (4) holding the mat in tension within a peripheral frame (1) of the trampoline which surrounds the mat has an enclosure system surrounding the mat. The enclosure has a lower peripheral part coupled to the mat and a plurality of resiliently flexible upright enclosure members (5) to support the barrier above the mat. The enclosure support members are free to resiliently deform away from the mat when impacted by a user against the barrier. They are also connected together at the upper ends of the enclosure support members away from their natural rest state and towards the center of the mat. When impacted by a user against the barrier on the side of the enclosure causing the barrier to resiliently deform away from the mat, the enclosure support members are resiliently deformed towards the center of the mat.

Abstract: A trampoline comprises a flexible mat, a plurality of resiliently flexible rods each having an upper end retained in the flexible mat, and a base frame arranged to retain the lower ends of the flexible rods. The base frame comprises for each rod an aperture through an upper side of the base frame into the interior of the tubular frame, and a formation into the interior of the tubular base frame from the lower side of the base frame and spaced laterally from the aperture, which may be formed by deforming material of the underside wall of the base frame into the interior of the base frame, for receiving the lower end of the flexible rod.

Abstract: A trampoline surrounding net bracing structure to provide improved connection between a trampoline and a surrounding net includes a framed bed, a plurality of supporting posts and a surrounding net. The framed bed has a jumping area to allow users to do jumping and bouncing exercise thereon. The supporting posts are located upright on the periphery of the framed bed. Each of the supporting posts has a top end equipped with a buffer means connecting to a bracing rack. The surrounding net has a bottom rim girded on the circumference of the jumping area and a top rim fastened to the bracing rack. Thus the surrounding net is stretched and surrounds the jumping area to form a confined movable space to allow the users to do jumping and bouncing exercise safer.

Abstract: A trampoline having one or more seat structures supported on a surrounding support frame with which a jumping surface is resiliently stretched. Each seat is carried by the surrounding support structure and is secured in plane by attachment to a trampoline leg that supports the jumping surface and the surrounding support frame. The seat structures are attachable to many known trampolines and provide seating outside of the jumping surface of the trampoline so that people can sit on the seats even while other people are jumping on the jumping surface and without obstructing the jumping surface.

Abstract: The trampoline with inflated base includes a generally toroidal shaped inflatable tube having an open center area. A mesh rebound member extends over the open center area and is secured around its entire periphery to the tube on the upper surface of the tube member. The tube includes a singular air duct or a plurality of air ducts extending radially which allow communication of air between the space interior to the tube and the space exterior to the tube.

Abstract: An exerciser includes a small trampoline, or rebounder (12), and a hand support (16) with handles (24, 26) that a person can grasp while jumping and rebounding to stabilize himself or herself, which is suitable for use in a commercial or public workout facility where there are likely to be many rebounders dedicated to such rebound exercising. The hand support lies immediately forward of the front end (46) of a rebounder that rests on a floor. The hand support includes a frame (40) that rests on the floor immediately forward of the rebounder front end and that has a top bar (44) that lies at least one meter above the rebounder mat (18). The top bar pivotally supports a handle device (22) that includes the handles (24, 26) at its lower end that can be grasped by a person who is jumping on the rebounder.

Abstract: A trampoline (10) includes a bed (14), a base frame (12), a bed suspension assembly (16) that resiliently couples the bed (14) to the base frame (12), and a plurality of legs (20) that are connected to the base fame (12) so as to maintain the base frame (12) above a surface (36). The base frame (12) includes a first side frame (22), a second side frame (24), a first end frame (26), and a second end frame (28). The plurality of legs (20) includes (i) a first leg (20A) that is secured to the first side frame (22) and the first end frame (26), (ii) a second leg (20B) that is secured to the first side frame (22) and the second end frame (28), (iii) a third leg (20C) that is secured to the second side frame (24) and the second end frame (28), and (iv) a fourth leg (20D) that is secured to the second side frame (24) and the first end frame (26).

Abstract: The assembly of the product begins with assembly of the trampoline frame. The vertical post can be made in multiple sections. The lower portion of the trampoline frame is assembled first, followed by the enclosure. After the entire frame is assembled, the bed is attached to the frame by springs. The springs are connected between the trampoline frame and the bed. A trampoline pad covers the springs. Finally, an enclosure is placed over the enclosure portion of the frame. The enclosure includes a net and preferably includes a zipper, or hook and loop straps for securing the opening of the entrance to the structure. It is preferred that the enclosure netting is secured to the enclosure frame portion by a sleeve, which can be padded for extra safety. The sleeve connection can be zippered for faster connection, or may have no lateral opening for greater strength.

Abstract: A fence surrounds a trampoline and extends above the rebounding surface, reducing the risk of injury. Shock absorption is aided by a support system of independent poles, linked at their tops by a flexible strap or line which is attached directly to a protective cap at the top of each pole. Also disclosed are a method and apparatus for attaching a pad to a trampoline frame either with or without an enclosure.

Abstract: A floatable trampoline that includes a floatable support, an apron attached to the floatable support, a mat, a first connector attached to the mat, a second connector attached to the apron, and springs, wherein at least one spring is attached to at least one first connector and at least one second connector so as to couple the mat to the apron.

Abstract: Trampolines are disclosed herein. An embodiment of a trampoline includes a first support member having a plurality of portions and a second support member having a plurality of portions. A first support member first portion is aligned with a second support member second portion wherein the area between the first support member first portion and the second member first portion is a first plane. A first support member second portion is aligned with a second support member second portion wherein the area between the first support member second portion and the second support member second portion is a second plane. A single piece of first material substantially covers the first plane and the second plane. The first plane intersects the second plane at an angle less than one hundred eighty degrees.

Abstract: An exerciser including a movable body support mounted on an exerciser frame for movement along tracks provided by the frame. A movable foot support extends from the exerciser frame. The movable foot support is adapted to be engaged by the user's feet to absorb the energy of movement in a first direction and to provide the user with a bouncing movement, which the user may translate into a movement of the movable body support in the opposite direction. The movable foot support may be provided as an attachment and retrofitted to existing exercisers. The exerciser may include a resilient resistance system coupled to the movable body support and a set of pull lines with user grips trained over pulleys carried by the exerciser frame. Also disclosed are methods for enabling users to exercise.

Abstract: A fence surrounds a trampoline and extends above the rebounding surface, reducing the risk of injury. Shock absorption is aided by a support system of independent poles. Variable placement net fasteners also are detailed.

Abstract: A fence surrounds a trampoline and extends above the rebounding surface, reducing the risk of injury. Shock absorption is aided in the preferred embodiment by a support system of independent poles, linked at their tops by a flexible strap or line. The trampoline may include a tubular frame supported by a plurality of legs with brackets securing the legs to the frame tube without welds. The trampoline may also include an electronic accessory that is activated or that produces an electrical signal as a result of jumping on the trampoline.

Abstract: A game apparatus including at least one rebound surface and flexible material dividing the rebound surface into at least two play areas includes a rebound surface mounting frame and a flexible material mounting frame coupled to hold the frames in substantially fixed relationship but allow movement of one frame in relation to the other for stress relief between the frames. At least one cross member supports the flexible material between play areas and reinforces the flexible material mounting frame. The individual play areas are formed by separate preassembled flexible material units that are mounted in the flexible material mounting frame and then secured together to for the individual play areas. The flexible material mounting frame includes walk bars and also supports basket assemblies used in game play.

Abstract: A way to attach a trampoline enclosure to a trampoline frame is described. This process involving constructing the enclosure with a buttonhole at or near its bottom edge. This buttonhole is designed to receive a spring attachment feature located on the rebounding mat of the trampoline structure. Generally, this spring attachment feature will be the D-ring (or V-ring) that is used to attach the rebounding mat to the springs. The D-ring will pass through the buttonhole and, when connected to a corresponding spring, will securely attach the trampoline enclosure to the trampoline.