Trampoline With Elastic Board

Description

CROSS-REFERENCE TO RELATED APPLICATION

This patent application claims the benefit and priority of Chinese Patent Application No. 2024118131468 filed with the China National Intellectual Property Administration on Dec. 10, 2024, the disclosure of which is incorporated by reference herein in its entirety as part of the present application.

TECHNICAL FIELD

The present disclosure relates to the technical field of trampolines, and particularly to a trampoline with an elastic board.

BACKGROUND

As a type of sports and recreational equipment, trampoline is difficult to stand on steadily, is unsuitable for middle-aged and elderly users, and also occupies a relatively large space.

U.S. Pat. No. 4,199,136 A uses a flexible semi-rigid and elongated sheet as an elastic element. However, this design does not fully resolve the problems caused by sheet bending, such as angular changes at ends of the sheet and a shortened distance between the ends of the sheet, resulting in limited vertical displacement of the sheet and the generation of frictional noise.

Chinese Patent Application No. 202311321877.6 discloses a trampoline including an elastic board and follower support members. However, the support member structure still has deficiencies. The main implementation scheme fails to avoid structural complexity, and during intense movement, the support members may lift off the ground along with the elastic board and generate vibration and noise upon landing.

Accordingly, there is an urgent need in the field for a novel trampoline with an elastic board to solve the above problems.

SUMMARY

An objective of the present disclosure is to provide a trampoline with an elastic board to solve the problems in the prior art by maintaining stability of homogeneous resilient support members, and horizontal stability of a central portion of the elastic board, and preventing excessive noise during bouncing movements by a user.

To achieve the above objective, the present disclosure provides the following solutions: the present disclosure discloses a trampoline with an elastic board, including an elastic board; multiple homogeneous resilient support members are fixed to lower ends of opposite sides of the elastic board, respectively; where each homogeneous resilient support member is provided with a central rotating portion; when the elastic board is subjected to pressure, a portion above the central rotating portion performs a rotational movement about the central rotating portion; a width of the central rotating portion is less than a width of a lower end of the homogeneous resilient support member, and is less than or equal to a width of an upper end of the homogeneous resilient support member.

Preferably, a distance from the central rotating portion to a bottom end of the homogeneous resilient support member is ½ to ⅘ of a height of the homogeneous resilient support member.

Preferably, the elastic board is a uniform-thickness board or a non-uniform-thickness board; the uniform-thickness board is a flat board or an arc-shaped board; the non-uniform-thickness board is configured with a middle thickness greater than a thickness at both ends;

the elastic board is rectangular or trapezoidal in shape.

Preferably, bottoms of the homogeneous resilient support members located on the opposite sides of the elastic board are connected by connecting plates, connecting ropes or connecting straps.

Preferably, a cavity structure is formed in each homogeneous resilient support member.

Preferably, the elastic board is made of a metallic material, a non-metallic material, or a composite material;

the homogeneous resilient support members are made of rubber.

Preferably, the homogeneous resilient support members are I-shaped support members.

Preferably, the homogeneous resilient support members are double-arc support members.

Preferably, the homogeneous resilient support members are K-shaped support members.

Preferably, the homogeneous resilient support members are conical support members.

Preferably, a buffer pad and/or a buffer body is disposed between the homogeneous resilient support members below the elastic board, and the buffer body may be an inflatable sphere. When the elastic board is in a non-pressed state, the buffer pad and/or the buffer body is spaced apart from a bottom surface of the elastic board by a certain space and distance. The buffer pad and the buffer body are used for buffering downward impact force when the elastic board is about to reach the ground, and for generating a corresponding rebound force.

Compared with the conventional art, the present disclosure has the following technical effects: The present disclosure provides a trampoline with an elastic board, specifically including an elastic board and homogeneous resilient support members mounted on both sides thereof, and the elastic board is supported from both sides to improve the elastic performance of the trampoline.

Further, during the deformation and restoration of the elastic board, the homogeneous resilient support members apply a restoring force to both ends of the elastic board by utilizing stable support at lower portions thereof and the overall elastic potential energy, thereby horizontal displacement of the central portion of the elastic board is restricted.

Further, the homogeneous resilient support members in the present disclosure are made of homogeneous elastic materials (such as rubber). The homogeneous resilient support members have a simple structure, which facilitates mass production and significantly reduces manufacturing costs. The elastic properties of the material can be adjusted as needed to meet design requirements. In addition, the structure can provide shock absorption and avoid possible noise during use, especially vibration and noise caused by landing after lifting off during intense movement.

Further, it is emphasized that the excellent dynamic undulation performance of the trampoline with the elastic board is mainly determined by the superior bending mechanical properties of the elastic board. The primary energy storage and energy release of the trampoline with the elastic board are derived from the bending and restoring of the elastic board. In this regard, the central rotating portions on the homogeneous resilient support members are configured with a relatively narrow width, which ensures the superior performance of the trampoline with the elastic board. Moreover, by adopting the design of a larger cross-section below a smaller cross-section of the central rotating portion in the homogeneous resilient support member, the homogeneous resilient support members can not only adapt to the angular changes at the ends of the elastic board, but also reduce the tendency of bottom surfaces of the homogeneous resilient support members to lose stability, flip up and shift horizontally due to bending moment.

Further, the present disclosure greatly simplifies the structure of the trampoline, providing a high-performance elastic exercise device suitable for various user groups, including middle-aged and elderly individuals, and can also assist athletes in training.

BRIEF DESCRIPTION OF THE DRAWINGS

To illustrate the technical solutions in the embodiments of the present disclosure or conventional art more clearly, the accompanying drawings required for the embodiments are briefly described below. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and those of ordinary skill in the art may still derive other accompanying drawings from these accompanying drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a trampoline with an elastic board according to Embodiment 1;

FIG. 2 is a schematic structural diagram of the trampoline with the elastic board in a pressed state according to Embodiment 1;

FIG. 3 is a front view of the trampoline with the elastic board in a pressed state according to Embodiment 1;

FIG. 4 is a schematic diagram of an I-shaped support member in the trampoline with the elastic board in a non-pressed state according to Embodiment 1;

FIG. 5 is a schematic diagram of the I-shaped support member in the trampoline with the elastic board in a pressed state according to Embodiment 1;

FIG. 6 is a front view of a trampoline with an elastic board in a pressed state according to Embodiment 2;

FIG. 7 is a schematic diagram of a double-arc support member in the trampoline with the elastic board in a non-pressed state according to Embodiment 2;

FIG. 8 is a schematic diagram of the double-arc support member in the trampoline with the elastic board in a pressed state according to Embodiment 2;

FIG. 9 is a front view of a trampoline with an elastic board in a pressed state according to Embodiment 3;

FIG. 10 is a schematic diagram of a K-shaped support member in the trampoline with the elastic board in a non-pressed state according to Embodiment 3;

FIG. 11 is a schematic diagram of the K-shaped support member in the trampoline with the elastic board in a pressed state according to Embodiment 3;

FIG. 12 is a schematic diagram of the trampoline with connecting straps using the elastic board according to Embodiment 3;

FIG. 13 is a front view of a trampoline with an elastic board in a non-pressed state according to Embodiment 4;

FIG. 14 is a front view of the trampoline with the elastic board in a pressed state according to Embodiment 4;

FIG. 15 is a schematic diagram of a conical support member in the trampoline with the elastic board in a non-pressed state according to Embodiment 4;

FIG. 16 is a schematic diagram of the conical support member in the trampoline with the elastic board in a pressed state according to Embodiment 4;

FIG. 17 is a side view of a non-uniform-thickness board;

FIG. 18 and FIG. 19 schematic diagrams of the elastic board with an additional buffer pad and buffer body, where, the buffer body in FIG. 19 is an inflatable sphere.

• • In the FIGS.: 1—Elastic board; 2—I-shaped support member; 3—Double-arc support member; 4—K-shaped support member; 5—Conical support member; 6—Connecting strap; 7—Buffer pad; 8—Buffer body; 9—Inflatable sphere.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Apparently, the embodiments described are merely some rather than all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments that can be obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

An objective of the present disclosure is to provide a trampoline with an elastic board to solve the problems in the prior art by maintaining stability of homogeneous resilient support members, and horizontal stability of a central portion of the elastic board, and preventing excessive noise during bouncing movements by a user.

To make the above objective, features and advantages of the present disclosure clearer and more comprehensible, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementations.

Embodiment 1

As shown in FIG. 1 to FIG. 5, the present embodiment provides a trampoline with an elastic board, including an elastic board 1. The elastic board 1 serves as an energy storage body that is elastically bendable and deformable. Multiple homogeneous resilient support members are fixed to lower ends of opposite sides of the elastic board 1, i.e., the multiple homogeneous resilient support members are disposed on lower surfaces of a first end and a second end of the elastic board, respectively. It should be noted that each homogeneous resilient support member is provided with a central rotating portion. The central rotating portion is a certain section of structure on the homogeneous resilient support member, not necessarily located at a central position of the homogeneous resilient support member. When the elastic board 1 is subjected to pressure, a portion above the central rotating portion rotates about the central rotating portion, and a portion below the central rotating portion does not move. A width of the central rotating portion is less than a width of a lower end of the homogeneous resilient support member, and a width of the central rotating portion is less than or equal to a width of an upper end of the homogeneous resilient support member.

During the bending deformation of the elastic board 1 under compression, the first end and the second end of the elastic board 1 undergo symmetrical angular changes. The homogeneous resilient support members corresponding to both ends are subjected to compression and inward bending elastic deformation, driven by the downward compression and angular changes at the ends of the elastic board 1. During the deformation of the elastic board 1, the homogeneous resilient support members on both sides provide a certain restoring force to the first end and second end of the elastic board 1 by means of elastic potential energy, so that during the bending deformation and recovery of the elastic board 1, horizontal displacement of a central portion of the elastic board 1 is restricted. When the central portion of the elastic board 1 is subjected to bending under force, the homogeneous resilient support members located at the first end and the second end of the elastic board 1 undergo elastic deformation. The portion above the central rotating portion of each homogeneous resilient support member not only follows the angular changes at the ends of the elastic board 1, but also overcomes the tendency of a bottom of the corresponding homogeneous resilient support member to shift and generate friction due to a bending force.

In this embodiment, the specific position of each central rotating portion needs to be designed according to the size and shape of the corresponding homogeneous resilient support member. Generally, a distance from the central rotating portion to a bottom end of the homogeneous resilient support member is ½ to ⅘ of a height of the homogeneous resilient support member.

The central rotating portion of the homogeneous resilient support member is designed with a relatively smaller cross-section within a certain range, while a larger cross-section is designed below the smaller cross-section of the central rotating portion, which ensures the homogeneous resilient support member adapt to (follow) the angular changes at the ends of the elastic board 1 and reduces the tendency of a bottom surface of the homogeneous resilient support member to partially lift off or shift horizontally. In other words, for the central rotating portion with a smaller cross-section, only a smaller bending moment is required to achieve the same angle change. As a result, such a homogeneous resilient support member is subjected to a relatively small bending moment as a whole, and the tendency of the bottom surface of the homogeneous resilient support member to shift may be reduced. A lower portion of the homogeneous resilient support member, especially a portion in contact with the ground, has a larger cross-section, which not only ensures the stability of the lower portion of the homogeneous resilient support member in resisting bending forces, but also enhances the horizontal stability of the elastic board 1 and the smoothness of elastic deformation of the elastic board 1.

In this embodiment, the elastic board 1 is a uniform-thickness board or a non-uniform-thickness board. The uniform-thickness board is a flat board or an arc-shaped board, i.e., a side profile thereof is either linear or curved. An arc-shaped side surface of the elastic board 1 is beneficial for reducing a design height of the homogeneous resilient support member. For a side view of the non-uniform-thickness board as shown in FIG. 17, the non-uniform-thickness board is configured such that a middle thickness greater than a thickness at both ends, thereby enabling more uniform deformation of the elastic board 1 under applied force. Further, the non-uniform-thickness board shown in FIG. 17 is configured with both upper and lower edges being curved. In actual manufacturing, one edge may be curved while the other edge may be linear. Further, the non-uniform-thickness board may be entirely configured as an arc-shaped non-uniform-thickness structure.

From a top view of the elastic board 1, the elastic board 1 generally has a rectangular shape, or a trapezoidal shape with parallel sides. Lower sides of the two parallel lower ends thereof are adapted for fixing the homogeneous resilient support members.

In this embodiment, the lower surfaces on both sides (or the first end and the second end of the elastic board 1) of the elastic board 1 are provided with multiple homogeneous resilient support members, respectively. As shown in FIG. 1 or FIG. 2, two homogeneous resilient support members are arranged on each side, and the number and positions of the homogeneous resilient support members symmetrically corresponding between both sides. Alternatively, one, three, or more homogeneous resilient support members may also be arranged on each side, which can be adjusted by those skilled in the art according to actual needs.

In order to prevent relative displacement of the corresponding homogeneous resilient support members on both sides caused by excessive bending deformation of the elastic board 1, the bottoms of the homogeneous resilient support members located on both sides of the elastic board 1 are connected by connecting plates, connecting ropes, or connecting straps 6. It should be noted that since the corresponding homogeneous resilient support members on both sides generally displace laterally during displacement, the flexible connecting ropes can also function to limit displacement. In addition, the connecting ropes or the connecting plates can also achieve the technical effect of preventing wear caused by friction between the bottom surfaces of the homogeneous resilient support members and the ground. The specific shape of the connecting straps 6 is not illustrated in this embodiment, and reference may be made to FIG. 12 of Embodiment 3.

In this embodiment, without affecting the main mechanical performance, a cavity structure is formed in each homogeneous resilient support member. The cavity structure can both reduce the overall weight and lower manufacturing costs. Alternatively, the cavity structure is generally formed in a location where the size of the homogeneous resilient support member is large, typically below the central rotating portion. If there is sufficient space above the central rotating portion, the cavity structure may also be formed therein.

In this embodiment, the elastic board 1 is made of a metallic material, a non-metallic material, or a composite material, where the metallic material includes, but is not limited to, existing aerospace aluminum. The non-metallic material includes, but is not limited to, existing wood materials, specifically plywood. The plywood is a multi-layer laminated flexible sheet, which may also be replaced by those skilled in the art with multilayer laminated flexible sheets made of other materials. The composite material may include conventional composites such as fiberglass and carbon fiber reinforced polymer.

The homogeneous resilient support member is made of polymer elastic materials, specifically including but not limited to existing rubber. The homogeneous resilient support member is simple in structure and can prevent potential noise during use, especially the noise and vibration generated when the device lifts off and then lands after vigorous movement.

In this embodiment, multiple nuts are pre-embedded within the upper end of each homogeneous resilient support member, and the homogeneous resilient support member can be fixed to the elastic board 1 by nuts and bolts on an upper surface thereof. The purpose of providing the multiple nuts is to adjust the span between the corresponding homogeneous resilient support members on both sides by connecting different nuts. Alternatively, multiple bolt holes with different spans may be arranged at both ends of the elastic board 1, so that the nuts at the upper ends of the homogeneous resilient support members can be connected to different bolt holes, thereby achieving adjustment of the span between the homogeneous resilient support members on both sides.

In this embodiment, a lower surface of each homogeneous resilient support member is provided with multiple vacuum suction cups, in particular two or more. The purpose of providing the vacuum suction cups is that, when installed on a smooth floor, the homogeneous resilient support members can be fixed to the smooth floor via the vacuum suction cups, thereby the stability of the homogeneous resilient support members can be further enhanced.

In this embodiment, the homogeneous resilient support members are I-shaped support members 2. A specific structure of each I-shaped support member 2 as shown in FIGS. 3 to 5, the I-shaped support member 2 is divided into four parts from top to bottom, which are respectively a first I-shaped component, a second I-shaped component, a third I-shaped component, and a fourth I-shaped component. A cross-sectional area of the first I-shaped component is greater than that of the second I-shaped component, and cross-sectional areas of the second, third, and fourth I-shaped components gradually increase. The first I-shaped component is configured with a relatively large cross-sectional area to increase its contact surface area with the elastic board 1, thereby enhancing the fixation stability therebetween. The fourth I-shaped component is configured with a relatively large cross-sectional area to increase its contact surface area with the ground, thereby enhancing frictional forces and improving the overall stability of the homogeneous resilient support member. The second I-shaped component is configured with a smallest cross-sectional area, thereby serving as the central rotating portion of the homogeneous resilient support member. When the elastic board 1 is subjected to a force, the second I-shaped component and the first I-shaped component above the second I-shaped component can rotate accordingly.

Embodiment 2

As shown in FIG. 6 to FIG. 8, the present embodiment provides a trampoline with an elastic board. The technical features disclosed in this embodiment are generally the same as those disclosed in Embodiment 1, with the difference lying in the shape of the homogeneous resilient support member, which is described as follows:

In this embodiment, the homogeneous resilient support member is a double-arc support member 3. The specific shape of the double-arc support member 3 is as shown in FIG. 6 to FIG. 8. The double-arc support member includes a double-arc portion and a double-arc base, where a vertical cross-section of the double-arc portion has a double-arc shape, and a narrowest portion of the double-arc portion serves as the central rotating portion. When a center of the elastic board 1 is subjected to pressure, both a center and an upper portion of the double-arc portion can rotate accordingly. The double-arc base is a cylindrical structure.

Embodiment 3

As shown in FIG. 9 to FIG. 12, the present embodiment provides a trampoline with an elastic board. The technical features disclosed in this embodiment are generally the same as those disclosed in Embodiment 1, with the difference lying in the shape of the homogeneous resilient support member, which is described as follows: In this embodiment, the homogeneous resilient support member is a K-shaped support member 4. As shown in FIG. 9 to FIG. 12, the specific shape of the K-shaped support member 4 includes a K-shaped upper inclined block and a K-shaped lower inclined block that are integrally formed. A cross-sectional area of the K-shaped upper inclined block gradually decreases from top to bottom, and a cross-sectional area of the K-shaped lower inclined block gradually increases from top to bottom. A lower end of the K-shaped upper inclined block is connected to an upper end of the K-shaped lower inclined block. Moreover, a joint between the K-shaped upper inclined block and the K-shaped lower inclined block serves as the central rotating portion. When a center of the elastic board 1 is subjected to pressure, both the joint between the K-shaped upper inclined block and the K-shaped lower inclined block, and the K-shaped upper inclined block located above can rotate accordingly.

Embodiment 4

As shown in FIG. 13 to FIG. 16, the present embodiment provides a trampoline with an elastic board. The technical features disclosed in this embodiment are generally the same as those disclosed in Embodiment 1, with the difference lying in the shape of the homogeneous resilient support member, which is described as follows:

In this embodiment, the homogeneous resilient support member is a conical support member 5. The specific shape of the conical support member 5 is shown in FIG. 13 to FIG. 16, which includes an upper cylindrical body and a lower conical body that are integrally formed, and a lower end of the upper cylindrical body is connected to an upper end of the lower conical body. A cross-sectional area of the upper cylindrical body is the same as a cross-sectional area of an upper surface of the lower conical body. That is, a joint between the upper cylindrical body and the lower conical body serves as the central rotating portion. When a center of the elastic board 1 is subjected to pressure, the joint between the upper cylindrical body and the lower conical body, and the upper cylindrical body can rotate accordingly.

Embodiment 5

As shown in FIG. 18 to FIG. 19, the present embodiment provides a trampoline with an elastic board. Considering that the elastic board 1 may touch the ground under excessive pressure, a buffer pad 7 limited by lower portions of multiple homogeneous resilient support members, or an elastic buffer body 8 limited by the buffer pad 7, is arranged below the elastic board 1. When the elastic board 1 is in a non-pressed state, the buffer pad 7 or the buffer body 8 is spaced apart from the bottom surface of the elastic board 1 by a certain space and distance. The elastic buffer body 8 is constrained below a center line of the elastic board 1 and may be an inflatable sphere 9. The buffer pad 7 and the buffer body 8 can be made of elastic polymer materials. The buffer pad 7 and the buffer body 8 (or the inflatable sphere 9) can serve to buffer the excessive downward impact on the elastic board 1 and provide an upward rebound force.

In the disclosure, the principle and implementations of the disclosure are described herein by using specific examples, the above descriptions of the above embodiments are merely intended to help understand the methods and core idea of the disclosure; meanwhile, for those of ordinary skill in the art, changes may be made to the specific embodiments and the scope of application according to the concept of the present disclosure. In summary, the content of the description should not be construed as a limitation to the present disclosure.