A bouncing structure and method for dance training

Abstract

The present invention discloses a bouncing structure and method for dance training, and relates to the technical field of bouncing training. The bouncing structure comprises a base and a positioning ring plate arranged above the base, a plurality of guide rods are arranged at the lower end of the positioning ring plate, and the lower end of each guide rod is slidably arranged with the upper end of a guide sleeve, the lower end of the positioning ring plate is connected and fixed to the base through a plurality of first springs, a coaxially arranged bouncing net is also provided at the center hole position of the positioning ring plate, the inner side of the rotating rod and the outer side of the bouncing net are connected and fixed through a plurality of tension springs, and the present invention improves the deficiencies of the existing bouncing structure, so that the tension of the bouncing structure can be adjusted with the weight of different practitioners, so as to adapt to people of different weights, the buffer pad unit can self-adjust the height of the bouncing net to maintain a preset gap, and a protective structure is also provided for practice to ensure the safety of practice.

Description

Technical Field

[0001] The invention relates to the technical field of bouncing training, in particular to a bouncing structure and method for dance training. Background Art

[0002] When dancing, you need to use jumping to pose in different postures. Jumping power is a comprehensive reflection of whole body strength, running speed, reaction speed, body coordination, flexibility, and agility. Jumping power can be improved through training. For example, the existing device trampoline for improving jumping power can effectively activate the leg muscles when jumping, thereby playing the role of exercising jumping power. However, when the trampoline is used for jumping, it is not easy to control its own balance. Because there is no good point of fulcrum, it is easy to lose control of its own balance. In order to meet the needs, the existing patent announcement number CN108905042B discloses a jumping training device. When using this product, the user can increase the number of soft rubber layers superimposed on each other according to his own weight, effectively avoiding the occurrence of balance loss. However, each condition here requires manual operation, and when adjusting the number of rubber layers, the overall height of the pad is not easy to control. After all, each rubber layer has a certain thickness. In addition, this jumping structure still lacks a protective structure, and there is still danger during jumping practice. Based on this, a jumping structure and method for dance training are now provided to eliminate the disadvantages of the existing device. Summary of the invention

[0003] The object of the present invention is to provide a bouncing structure and method for dance training to solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A bouncing structure for dance training, comprising a base and a positioning ring plate arranged above the base, a plurality of guide rods are arranged at the lower end of the positioning ring plate, the lower end of each guide rod is slidably arranged with the upper end of a guide sleeve, the lower end of the positioning ring plate is connected and fixed to the base through a plurality of first springs, a coaxially arranged bouncing net is also arranged at the center hole position of the positioning ring plate, the inner side of the rotating rod and the outer side of the bouncing net are connected and fixed through a plurality of tension springs, a protective cloth is arranged between the positioning ring plate where the tension spring is located and the bouncing net, and a plurality of self-adjusting mechanisms for adjusting the tightness of the tension spring are arranged on the positioning ring plate;

[0006] A buffer pad unit is also provided at the upper end of the base below the bouncing net, and a protective cover for preventing practitioners from falling is also provided above the bouncing net. The protective cover is connected to a lifting mechanism for driving the protective cover to move up and down.

[0007] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0008] In an optional solution: the protective cover is a transparent structure, the protective cover is a cylindrical body with openings at both ends, an air-filled layer is provided on the inner wall of the protective cover, and vertically distributed scale bars are provided on the surface of the protective cover.

[0009] In an optional solution: the buffer pad unit includes a loading plate arranged below the bouncing net, a plurality of superimposed elastic pads are provided on the upper end of the loading plate, adjacent elastic pads are connected and fixed by Velcro, and the loading plate is connected to drive a height adjustment mechanism for adjusting its height.

[0010] In an optional solution: the height adjustment mechanism includes lifting columns arranged on both sides of the loading plate, each lifting column has an adjusting screw hole at the lower end, and each adjusting screw hole is matched with an adjusting screw, the lower end of the adjusting screw is connected to a lifting motor for driving the adjustment screw to rotate, the control end of the lifting motor is connected to a first distance sensor for obtaining the distance between the center position of the bouncing net and the top of the elastic pad, and the control end of the lifting motor is also electrically connected to a second distance sensor for detecting the height of the protective cover.

[0011] In an optional scheme: the self-adjusting mechanism includes a telescopic sliding hole arranged on the inner side of the rotating rod, an adjusting slider is slidably arranged in each telescopic sliding hole, the outer end of the adjusting slider is connected to one end of the tension spring, the inner end of the adjusting slider is provided with an adjusting screw hole, and an adjusting screw is matched in the adjusting screw hole, the outer end of the adjusting screw is connected and fixed to the rotating rod, the other end of the rotating rod passes through the outer side of the positioning ring plate, the rotating rod and the positioning ring plate are rotatably connected through a bearing, a self-adjusting gear is provided at the outer end of the rotating rod, the self-adjusting gear is meshed with the transmission tooth surface on the outer side of the supporting rack plate, the number and position of the supporting rack plate correspond to the self-adjusting gear, and the lower end of the supporting rack plate is connected and fixed to the base.

[0012] In an optional scheme: the lifting mechanism includes a supporting vertical plate vertically arranged at the upper end of the base, a lifting slider is slidably provided on the left side of the supporting vertical plate, a positioning side rod for connecting the protective cover is provided on the side of the lifting slider, a lifting screw hole is provided on the upper and lower end surfaces of the lifting slider, a lifting screw rod is cooperated with the lifting screw hole, the upper end of the lifting screw rod is rotatably connected to the side block at the top of the supporting vertical plate, and the lower end of the lifting screw rod is connected to the output end of the lifting motor.

[0013] In an optional scheme: a locking limit piece for locking the height of the positioning ring plate is also provided on the outer side of the base, and the final height of the positioning ring plate adjusted by the self-adjusting mechanism is limited by the locking limit piece to avoid the problem of the positioning ring plate shaking up and down during practice. The locking limit piece includes a limiting cavity arranged inside the guide sleeve, and a sliding opening is opened on the right side of the limiting cavity, and a horizontally arranged sliding cross bar is slidably provided at the position of the sliding opening. A force-bearing wheel is rotated at the right end of the sliding cross bar, and a locking pressure block is provided on the left end of the sliding cross bar for pressing the surface of the guide rod to limit the movement of the guide rod. The locking pressure block is connected and fixed to the inner wall of the limiting cavity by a second spring. Under the action of the second spring, the locking pressure block does not contact the guide rod. A squeezing mechanism for squeezing it is provided on the right side of the force-bearing wheel, and the pressing surfaces of the guide rod and the second spring are provided with limiting tooth surfaces for locking the two.

[0014] In an optional solution: the extrusion mechanism includes a pressure bevel block slidably set on the supporting vertical plate, the pressure bevel block is threadedly connected to the lifting screw, and a pressure bevel surface is provided on the side of the pressure bevel block close to the force wheel, and the pressure bevel block is consistent with the threaded hole on the lifting slider.

[0015] In an optional solution: a ladder is also provided at the upper end of the base to assist personnel in climbing.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention improves upon the deficiencies of existing bouncing structures, such that the tension of the bouncing structure can be adjusted according to the weight of different practitioners, thereby adapting to people of different weights. The buffer pad unit can self-adjust the height of the bouncing net to maintain a preset gap. In addition, a protective structure is provided for practice to ensure the safety of practice, while providing a reference for bouncing and ensuring the quality of practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the lower side of the present invention.

[0020] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 4 It is a partial enlarged view of the structure of the present invention.

[0022] Notes on figure numbers: base 11, elastic pad 12, first spring 13, guide sleeve 14, guide rod 15, step 16, tension spring 17, protective cloth 18, protective cover 19, lifting screw 20, positioning side rod 21, lifting slider 22, supporting vertical plate 23, lifting column 24, lifting motor 25, adjusting screw 26, positioning ring plate 27, pressing bevel block 28, force wheel 29, sliding cross bar 30, limiting cavity 31, locking pressure block 32, second spring 34, adjusting slider 35, adjusting screw 36, rotating rod 37, supporting rack plate 38, bouncing net 39, self-adjusting gear 40. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] In one embodiment, Figure 1-Figure 4 As shown, a jumping structure for dance training includes a base 11 and a positioning ring plate 27 arranged above the base 11, a plurality of guide rods 15 are arranged at the lower end of the positioning ring plate 27, and the lower end of each guide rod 15 is slidably arranged with the upper end of the guide sleeve 14, and the lower end of the positioning ring plate 27 is connected and fixed to the base 11 through a plurality of first springs 13. This retractable structure allows the height of the entire jumping structure to be automatically adjusted according to different human body weights, and a coaxially arranged jumping net 39 is also provided at the center hole position of the positioning ring plate 27, and the inner side of the rotating rod 37 and the outer side of the jumping net 39 are connected and fixed by a plurality of tension springs 17, and a protective cloth 18 is provided between the positioning ring plate 27 where the tension spring 17 is located and the jumping net 39, and a plurality of self-adjusting mechanisms for adjusting the tightness of the tension spring 17 are provided on the positioning ring plate 27, and the self-adjusting mechanism can quickly adjust the tension of the tension spring 17 according to the weight of the trainee, so that the initial value of the elastic force of the spring matches the corresponding weight of the trainee, which helps to improve the training effect on the trainee;

[0025] A cushion unit is also provided at the upper end of the base 11 below the bouncing net 39. The cushion unit can adjust its support height according to the position of the bottom of the bouncing net 39 to cooperate with the fine adjustment of the tension of the tension spring 17. A protective cover 19 is also provided above the bouncing net 39 to prevent the practitioner from falling. The protective cover 19 is connected to a lifting mechanism for driving it to move up and down.

[0026] The protective cover 19 is a transparent structure, and is a cylindrical body with openings at both ends. An inflatable layer is provided on the inner wall of the protective cover 19, so that there will be no injuries in case of bumps during the exercise, thus ensuring the safety of the exercise;

[0027] The surface of the protective cover 19 is provided with vertically distributed scale bars, so that the jumping height can be controlled during jumping practice;

[0028] The buffer pad unit includes a loading plate arranged below the bouncing net 39, a plurality of elastic pads 12 are arranged on the upper end of the loading plate, and adjacent elastic pads 12 are connected and fixed by Velcro, and the loading plate is connected to a height adjustment mechanism for driving the height adjustment thereof, and the height adjustment mechanism is adjusted according to the height of the middle position of the bottom of the bouncing net 39, so as to ensure the distance between the bouncing net 39 and the top of the elastic pad 12;

[0029] The height adjustment mechanism includes lifting columns 24 arranged on both sides of the loading plate, each lifting column 24 has an adjusting screw hole at the lower end, and each adjusting screw hole is matched with an adjusting screw 26, the lower end of the adjusting screw 26 is connected to a lifting motor 25 for driving the same to rotate, the control end of the lifting motor 25 is connected to a first distance sensor for obtaining the distance between the center position of the bouncing net 39 and the top of the elastic pad 12, and the control end of the lifting motor 25 is also electrically connected to a second distance sensor for detecting the height of the protective cover 19, so that a reference can be provided for adjusting the height of the elastic pad 12, driven by the lifting motor 25, the adjusting screw 26 and the lifting column 24 rotate relative to each other, and under the action of the thread, the adjusting screw 26 and the lifting column 24 rotate relative to each other, and under the action of the thread, the lifting column 24 can drive the height of the loading plate to be adjusted, it should be noted that the adjustment here is only performed when the protective cover 19 has not fallen, and when the protective cover 19 falls, the height of the elastic pad 12 will be locked;

[0030] The self-adjusting mechanism includes a telescopic sliding hole arranged on the inner side of the rotating rod 37, and an adjusting slider 35 is slidably arranged in each telescopic sliding hole. The outer end of the adjusting slider 35 is connected to one end of the tension spring 17, and an adjusting screw hole is arranged at the inner end of the adjusting slider 35. An adjusting screw rod 36 is matched in the adjusting screw hole. The outer end of the adjusting screw rod 36 is connected and fixed to the rotating rod 37, and the other end of the rotating rod 37 passes through the outer side of the positioning ring plate 27. The rotating rod 37 is rotatably connected to the positioning ring plate 27 through a bearing. A self-adjusting gear 40 is arranged at the outer end of the rotating rod 37, and the self-adjusting gear 40 meshes with the transmission tooth surface on the outer side of the supporting rack plate 38. The number and position of the supporting rack plate 38 correspond to the self-adjusting gear 40, and the lower end of the supporting rack plate 38 is connected and fixed to the base 11; when the trainee steps on the middle position of the jumping net 39, under the action of gravity, the positioning ring plate 27 will slide down along the guide rod 15 and the guide sleeve 14, and in the process of sliding down, the self-adjusting gear 40 rotates under the action of the transmission tooth surface of the supporting rack plate 38, and the self-adjusting gear 40 drives the rotating rod 37 to rotate, and the rotating rod 37 drives the adjusting screw 36 and the adjusting slider 35 to rotate relative to each other, and under the action of the thread, the adjusting slider 35 slides along the telescopic sliding hole in the positioning ring plate 27, thereby tightening the tension spring 17;

[0031] The lifting mechanism includes a supporting vertical plate 23 vertically arranged at the upper end of the base 11, a lifting slider 22 is slidably provided on the left side of the supporting vertical plate 23, a positioning side rod 21 for connecting the protective cover 19 is provided on the side of the lifting slider 22, and a lifting screw hole is provided on the upper and lower end surfaces of the lifting slider 22, and a lifting screw rod 20 is matched in the lifting screw hole, and the upper end of the lifting screw rod 20 is rotatably connected to the side block at the top of the supporting vertical plate 23, and the lower end of the lifting screw rod 20 is connected to the output end of the lifting motor. Under the action of the lifting motor, the lifting screw rod 20 and the lifting slider 22 rotate relative to each other, and under the action of the thread, the lifting slider 22 slides along the surface of the supporting vertical plate 23, thereby driving the positioning side rod 21 to adjust the height, and the positioning side rod 21 drives the protective cover 19 to adjust the height. Only when the practitioner stands on the bouncing net 39 and prepares to practice, it is necessary to lower the protective cover 19 to the upper side of the bouncing net 39, thereby forming a protective circle;

[0032] The outer side of the base 11 is also provided with a locking limiter for locking the height of the positioning ring plate 27. The final height of the positioning ring plate 27 adjusted by the self-adjusting mechanism is limited by the locking limiter to avoid the problem of the positioning ring plate 27 shaking up and down during the practice. The locking limiter includes a limiting cavity 31 arranged inside the guide sleeve 14, and a sliding opening is opened on the right side of the limiting cavity 31. A horizontally arranged sliding cross bar 30 is slidably provided at the position of the sliding opening. A force-bearing wheel 29 is rotatably provided at the right end of the sliding cross bar 30, and a A locking block 32 for pressing against the surface of the guide rod 15 to limit the movement of the guide rod 15. The locking block 32 is connected and fixed to the inner wall of the limiting cavity 31 by a second spring 34. Under the action of the second spring 34, the locking block 32 does not contact the guide rod 15. A squeezing mechanism for squeezing the force-bearing wheel 29 is provided on the right side of the force-bearing wheel 29. The force is applied to the force-bearing wheel 29 by the squeezing mechanism, so that the locking block 32 can be pressed against the surface of the guide rod 15. The pressing surfaces of the guide rod 15 and the second spring 34 are provided with limiting tooth surfaces for locking the two.

[0033] The squeezing mechanism includes a pressing inclined block 28 slidably arranged on the supporting vertical plate 23, the pressing inclined block 28 is threadedly connected to the lifting screw 20, and a pressing inclined surface is provided on the side of the pressing inclined block 28 close to the force wheel 29, and the pressing inclined block 28 is consistent with the threaded hole on the lifting slider 22. The pressing inclined block 28 here moves in the same steps as the protective cover 19, so only when the protective cover 19 is lowered to the upper end of the bouncing net 39, the pressing inclined block 28 also drops to the position of the force wheel 29, thereby providing locking power for the locking limiter;

[0034] The advantage of combining the protective state with the height locking state of the positioning ring plate 27 in the present application is that it can ensure that the exerciser is forced to lower the protective cover 19 to the upper end of the bouncing net 39 during exercise. After all, in actual operation, if the protective cover 19 is only an optional option, many exercisers who think highly of themselves will not use the protective cover 19 for protection. The linkage setting mode of the present application eliminates this disadvantage and ensures the safety of exercise.

[0035] The upper end of the base 11 is also provided with a ladder 16 for assisting personnel to climb up.

[0036] The above embodiment discloses a bouncing structure for dance training, wherein, in actual use, the trainee climbs along the ladder 16 to the center of the surface of the bouncing net 39, at which time, under the action of gravity, the positioning ring plate 27 will slide down along the guide rod 15 and the guide sleeve 14, and in the process of sliding down, the self-adjusting gear 40 rotates under the action of the transmission tooth surface of the supporting rack plate 38, and the self-adjusting gear 40 drives the rotating rod 37 to rotate, and the rotating rod 37 drives the adjusting screw 36 and the adjusting slider 35 to rotate relative to each other, and under the action of the thread, the adjusting slider 35 moves along The protective cover 19 is driven down by the lifting mechanism when exercising. When the lower end of the protective cover 19 is close to the upper end of the bouncing net 39, the exercise range can be wrapped, making the exercise safer. When the protective cover 19 descends, the extrusion mechanism generates a force on the force-bearing wheel 29, so that the locking pressure block 32 can be pressed and contacted with the surface of the guide rod 15, thereby limiting the change in the height of the positioning ring plate 27 and providing a support basis for exercise.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A bouncing structure for dance training, comprising a base (11) and a positioning ring plate (27) arranged above the base, wherein a plurality of guide rods (15) are arranged at the lower end of the positioning ring plate (27), and the lower end of each guide rod (15) is slidably arranged with the upper end of a guide sleeve (14), characterized in that: The lower end of the positioning ring plate (27) is connected and fixed to the base (11) via a plurality of first springs (13); a coaxially arranged bouncing net (39) is also provided at the center hole of the positioning ring plate (27); the inner side of the rotating rod (37) and the outer side of the bouncing net (39) are connected and fixed via a plurality of tension springs (17); a protective cloth (18) is provided between the positioning ring plate (27) where the tension spring (17) is located and the bouncing net (39); and a plurality of self-adjusting mechanisms for adjusting the tightness of the tension spring (17) are provided on the positioning ring plate (27); A cushion unit is also provided at the upper end of the base (11) below the bouncing net (39), and a protective cover (19) for preventing a practitioner from falling is also provided above the bouncing net (39), wherein the protective cover (19) is connected to a lifting mechanism for driving the protective cover (19) to move up and down; The self-adjusting mechanism comprises a telescopic sliding hole arranged on the inner side of the rotating rod (37), an adjusting slider (35) is slidably arranged in each telescopic sliding hole, the outer end of the adjusting slider (35) is connected to one end of the tension spring (17), the inner end of the adjusting slider (35) is provided with an adjusting screw hole, an adjusting screw rod (36) is matched in the adjusting screw hole, the outer end of the adjusting screw rod (36) is connected and fixed to the rotating rod (37), the other end of the rotating rod (37) passes through the outer side of the positioning ring plate (27), the rotating rod (37) and the positioning ring plate (27) are rotatably connected via a bearing, a self-adjusting gear (40) is arranged on the outer end of the rotating rod (37), the self-adjusting gear (40) is meshed with the transmission tooth surface on the outer side of the supporting rack plate (38), the number and position of the supporting rack plate (38) correspond to the self-adjusting gear (40), and the lower end of the supporting rack plate (38) is connected and fixed to the base (11); The lifting mechanism comprises a support vertical plate (23) vertically arranged at the upper end of the base (11); a lifting slider (22) is slidably provided on the left side of the support vertical plate (23); a positioning side rod (21) for connecting to the protective cover (19) is provided on the side of the lifting slider (22); a lifting screw hole is provided on the upper and lower end surfaces of the lifting slider (22); a lifting screw rod (20) is provided in the lifting screw hole; the upper end of the lifting screw rod (20) is rotatably connected to the side block at the top of the support vertical plate (23); and the lower end of the lifting screw rod (20) is connected to the output end of the lifting motor; The base (11) is also provided with a locking limiter for locking the height of the positioning ring plate (27) on the outside. The final height of the positioning ring plate (27) adjusted by the self-adjusting mechanism is limited by the locking limiter to avoid the problem of the positioning ring plate (27) shaking up and down during the exercise. The locking limiter includes a limit cavity (31) arranged inside the guide sleeve (14). The limit cavity (31) has a sliding opening on the right side. A horizontally arranged sliding cross bar (30) is slidably provided at the position of the sliding opening. A force bearing wheel (29) is rotatably provided at the right end of the sliding cross bar (30). The sliding cross bar (30) is 30) A locking pressure block (32) is provided at the left end thereof for pressing against the surface of the guide rod (15) to limit the movement of the guide rod (15); the locking pressure block (32) is connected and fixed to the inner wall of the limiting cavity (31) by a second spring (34); under the action of the second spring (34), the locking pressure block (32) does not contact the guide rod (15); a squeezing mechanism for squeezing the guide rod (15) is provided on the right side of the force-bearing wheel (29); the pressing surfaces of the guide rod (15) and the second spring (34) are provided with limiting tooth surfaces for locking the two; and a ladder (16) is also provided at the upper end of the base (11) for assisting personnel to climb up; The squeezing mechanism comprises a pressing inclined block (28) slidably arranged on the supporting vertical plate (23), the pressing inclined block (28) being threadedly connected to the lifting screw (20), a pressing inclined surface being provided on a side of the pressing inclined block (28) close to the force wheel (29), and the pressing inclined block (28) being consistent with a threaded hole on the lifting slider (22).

2. The bouncing structure for dance training according to claim 1, characterized in that: The protective cover (19) is a transparent structure, and is a cylindrical body with openings at both ends, and an air-filled layer is provided on the inner wall of the protective cover (19).

3. The bouncing structure for dance training according to claim 1, characterized in that: The buffer pad unit comprises a material carrier plate arranged below the bouncing net (39), a plurality of superimposed elastic pads (12) being arranged at the upper end of the material carrier plate, adjacent elastic pads (12) being connected and fixed by Velcro, and the material carrier plate is connected to a height adjustment mechanism for driving the height adjustment thereof.

4. The bouncing structure for dance training according to claim 3, characterized in that: The height adjustment mechanism comprises lifting columns (24) arranged on both sides of the loading plate, each lifting column (24) having an adjustment screw hole at the lower end, each adjustment screw hole having an adjustment screw (26) arranged therein, the lower end of the adjustment screw (26) being connected to a lifting motor (25) for driving the adjustment screw (26) to rotate, the control end of the lifting motor (25) being connected to a first distance sensor for obtaining the distance between the center position of the bouncing net (39) and the top of the elastic pad (12), and the control end of the lifting motor (25) being also electrically connected to a second distance sensor for detecting the height of the protective cover (19).

5. The bouncing structure for dance training according to claim 4, characterized in that: The surface of the protective cover (19) is provided with vertically distributed scale bars.

6. A method for using the bouncing structure for dance training according to claim 5, characterized in that: The following steps are involved: Step 1: The trainee climbs up the ladder (16) to the center of the surface of the bouncing net (39). At this time, under the action of gravity, the positioning ring plate (27) will slide down along the guide rod (15) and the guide sleeve (14). During the sliding process, the self-adjusting gear (40) rotates under the action of the transmission tooth surface of the supporting rack plate (38), and the self-adjusting gear (40) drives the rotating rod (37) to rotate. The rotating rod (37) drives the adjusting screw (36) and the adjusting slider (35) to rotate relative to each other. Under the action of the thread, the adjusting slider (35) slides along the telescopic sliding hole in the positioning ring plate (27), thereby tightening the tension spring (17); Step 2: The protective cover (19) is driven to descend by the lifting mechanism. When the lower end of the protective cover (19) is close to the upper end of the bouncing net (39), the exercise range can be wrapped, thereby making the exercise safer. When the protective cover (19) descends, the extrusion mechanism generates a force on the force-bearing wheel (29), so that the locking pressure block (32) can be pressed and contacted with the surface of the guide rod (15), thereby limiting the change in the height of the positioning ring plate (27); Step 3: The height adjustment mechanism is adjusted according to the height of the middle position of the bottom of the bouncing net (39) to ensure the distance between the bouncing net (39) and the top of the elastic pad (12).

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