Portable auxiliary bounce training device

By designing a portable auxiliary jumping training device, which utilizes ropes and elastic tension components to provide elastic resistance, the problem of non-standard existing training equipment is solved, achieving standardized jumping training effects and portability.

CN223555399UActive Publication Date: 2025-11-18BEIJING SPORT UNIV
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Patent Information

Application Number
CN202422784459.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2025-11-18
Estimated Expiration
2034-11-15

AI Technical Summary

Technical Problem

There are few existing resistance training aids, the training effects are not standardized, and the requirements for weighted squats or half squats are strict in terms of the weights and how to wear them, making it difficult for many trainees to achieve standardized training.

Method used

A portable auxiliary jumping training device was designed, including a base plate, a training platform, a waist trainer, a rope, a rope guide structure, and an elastic tension component. The rope and elastic tension component provide elastic resistance to simulate the training effect of weighted squats or half squats. The structure is reasonably designed and can effectively train jumping after squatting.

Benefits of technology

It enables standardized jumping training, reduces reliance on heavy objects, improves training effectiveness and safety, and has a simple structure that is easy to carry and use.

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Abstract

The utility model relates to the technical field of sports equipment, in particular to a portable auxiliary bounce training device. The portable auxiliary bounce training device comprises a bottom plate, a training table, a waist binding device, two rope belts, two rope belt guiding structures and two elastic tension assemblies, the edges of the two sides of the bottom plate are respectively provided with a walking mechanism capable of being lifted to suspend or fall to the ground, and the training table is installed in the middle of the upper end of the bottom plate. The two rope belt guiding structures are installed on the two sides of the upper end of the training table respectively, the two elastic tension assemblies are installed on the two sides of the upper end of the bottom plate respectively, the two rope belts penetrate through the two rope belt guiding structures in a one-to-one correspondence mode, one ends of the rope belts are connected with the waist girdling device, and the other ends of the rope belts are connected with the waist girdling device. And the other end of the rope belt is connected with one group of elastic tension components on the corresponding side. The bouncing training device has the advantages of being reasonable in structural design, simple in structural layout and capable of effectively training jumping after squatting and achieving the purpose of bouncing training.
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Description

TECHNICAL FIELD

[0001] The utility model relates to sports equipment technical field, especially a portable auxiliary bounce training device. BACKGROUND

[0002] When sportsman is in bounce training, generally adopts resistance training, fast super ordinary practice, basketball bounce practice, leg strength training, explosive force training, flexibility training etc. When resistance training, generally adopts the method such as kettlebell jump, weight deep squat, weight deep squat jump, weight half squat, barbell jump to develop leg muscle and ankle strength. The existing resistance training auxiliary equipment is less, most are similar equipment in gymnasium, and the trainer constantly pushes up the weight after lying flat. And weight deep squat or half squat needs to be strictly executed according to training action, and the requirement and wearing of weight are also more rigorous, and many trainers cannot realize standardization, effective training. Therefore, the training effect is slightly poor.

[0003] Therefore, a professional portable auxiliary bounce training device needs to be developed to achieve better and more standard training mode. UTILITY MODEL CONTENT

[0004] The utility model provides a portable auxiliary bounce training device, effectively overcome the defects of prior art.

[0005] The utility model solves the technical scheme as follows to the above-mentioned technical problem.

[0006] A portable auxiliary bounce training device, including bottom plate, training table, waist binder, two rope belts, two groups of rope belt guide structure and two groups of elastic tension assembly, the both sides edges of bottom plate are equipped with liftable suspension or landing walking mechanism respectively, training table is equipped on the middle part of bottom plate upper end, two groups of rope belt guide structure are equipped on the both sides of training table upper end respectively, two groups of elastic tension assembly are equipped on the both sides of bottom plate upper end respectively, two rope belts pass through two groups of rope belt guide structure one by one respectively, one end of rope belt is connected with waist binder, the other end of rope belt is connected with a group of elastic tension assembly of corresponding side.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] Further, the training table includes a support plate, a cylindrical table body, and an elastic member. The support plate is horizontally arranged above the bottom plate, and vertical guide columns are arranged around the lower end of the support plate. Guide sleeves are arranged on the upper end of the bottom plate and correspond to the guide columns. The elastic member is arranged between the support plate and the bottom plate, and two groups of rope belt guide structures are arranged on the both sides of the upper end of the support plate.

[0009] Further, the waistband includes two detachable buckle assemblies at two ends of the waistband.

[0010] Further, the rope guiding structure includes two vertical fixed strips and two guide wheels, the two fixed strips are parallel and spaced apart, the two guide wheels are rotatably arranged between the upper ends of the two fixed strips and are close to each other, and the rope passes through the two guide wheels.

[0011] Further, the elastic tension assembly includes a tension rod, a tension device, and a support, the tension rod is horizontally arranged, both ends of the tension rod are respectively provided with a bearing seat rotatably connected to the tension rod, the bearing seat is fixed to the upper end of the bottom plate through a vertical column, the tension device is arranged on the upper end of the bottom plate through the support, the tension device is provided with a through hole at the center, the tension rod passes through the through hole, the tension device is provided with a spiral channel around the through hole, one end of the channel is open and the other end is closed, the channel is provided with a piston body sealingly connected to the inner wall of the channel, the piston body is connected to a tension rope, one end of the tension rope away from the piston body passes out of one end of the channel and is connected to a corresponding fixing point of the tension rod, both ends of the tension rod are respectively detachably provided with a wire wheel, the wire wheel is wound with a traction rope, one end of the traction rope is connected to the other end of the corresponding side of the rope.

[0012] Further, the support includes two vertical strip-shaped plates, the two strip-shaped plates are respectively fixed to the upper end of the bottom plate, and upper ends of the two strip-shaped plates are respectively located on both sides of the tension device, and both sides of the tension device are detachably connected to the upper ends of the two strip-shaped plates.

[0013] Further, one side of the upper end of each of the two strip-shaped plates close to each other is provided with a clamping groove, both sides of the tension device are respectively clamped into the clamping groove, the upper end of the strip-shaped plate is threadedly connected with a vertical fixing bolt, both sides of the tension device are respectively provided with a threaded hole, and the fixing bolt is threadedly connected with the corresponding threaded hole.

[0014] Further, both ends of the tension rod are respectively detachably connected with an auxiliary connecting rod, and the auxiliary connecting rod is rotatably connected with the two bearing seats.

[0015] Further, the walking mechanism includes a door-shaped metal frame, a walking wheel, and a height adjustment screw, the metal frame is fixed to the side end of the bottom plate, the walking wheel is slidably arranged in the metal frame, and the height adjustment screw is vertically arranged and threadedly connected to the upper end of the metal frame, and the lower end of the height adjustment screw is rotatably connected to the upper end of the walking wheel.

[0016] Further, the training platform is provided with a protective fence around the training platform.

[0017] The portable auxiliary bounce training device has the advantages of reasonable structure design, simple structure layout, effective squatting and jumping training, and bounce training purpose. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Figure 2 is a structure side view of the portable auxiliary bounce training device of the utility model;

[0019] Figure 2 Figure 3 is a structure top view of the portable auxiliary bounce training device of the utility model;

[0020] Figure 3 Figure 4 is a structure schematic view of a tensioner in the portable auxiliary bounce training device of the utility model.

[0021] In the drawings, the components represented by each reference numeral are listed as follows:

[0022] 1, bottom plate; 2, training table; 3, waist binder; 4, rope belt; 5, rope belt guide structure; 6, elastic tension assembly; 7, walking mechanism; 11, guide sleeve; 21, support plate; 22, table body; 23, elastic member; 51, fixed strip; 52, guide wheel; 61, tension rod; 62, tensioner; 63, support; 64, bearing seat; 65, tension rope; 66, wire wheel; 67, traction rope; 71, sheet metal frame; 72, walking wheel; 73, height adjustment bolt; 211, guide column; 611, auxiliary connecting rod; 621, passage; 622, piston body; 631, strip plate; 632, fixing bolt. DETAILED DESCRIPTION

[0023] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0024] EMBODIMENT

[0025] As shown in Figure 1 , 2 , the portable auxiliary bounce training device of the embodiment comprises a bottom plate 1, a training table 2, a waist binder 3, two rope belts 4, two groups of rope belt guide structures 5 and two groups of elastic tension assemblies 6, the two side edges of the bottom plate 1 are respectively provided with walking mechanisms 7 that can be lifted and suspended or fall to the ground, the training table 2 is mounted on the upper end of the bottom plate 1, the two groups of rope belt guide structures 5 are respectively mounted on the upper ends of the two sides of the training table 2, the two groups of elastic tension assemblies 6 are respectively mounted on the upper ends of the two sides of the bottom plate 1, the two rope belts 4 are respectively and one by one passed through the two groups of rope belt guide structures 5, one end of the rope belt 4 is connected with the waist binder 3, and the other end of the rope belt 4 is connected with a group of the elastic tension assemblies 6 on the corresponding side.

[0026] The portable auxiliary bounce training device of the embodiment can be lifted and suspended or made to fall to the ground by the walking mechanism 7, so that the device can be stably supported on the training ground or can walk along the training ground using the walking mechanism 7, facilitating carrying. When in use, the trainer stands on the training platform 2, and then uses the waist binder 3 to be fixed on the waist, and then performs a half squat or deep action to jump, in the process of jumping, two groups of elastic tensioning assemblies 6 respectively play the role of elastic tensioning on the rope belt 4 from both sides, that is, play the role of elastic resistance, thereby achieving the effect of deep squat or half squat similar to "weight training". Since the user does not need to wear weights on the body, it is easier to standardize the half squat or deep posture, thereby achieving a better training effect. At the same time, the rope guiding structure 5 can ensure that the rope belt 4 always passes through it, thereby playing the role of calibration and retention of the orientation of the rope belt 4.

[0027] As a preferred embodiment, the training platform 2 comprises a support plate 21, a cylindrical platform body 22 and an elastic member 23. The support plate 21 is horizontally arranged above the bottom plate 1, and vertical guide columns 211 are arranged around the lower end of the support plate 21. The bottom plate 1 is provided with guide sleeves 11 corresponding to the guide columns 211. The elastic member 23 is arranged between the support plate 21 and the bottom plate 1, and two groups of rope guiding structures 5 are arranged on both sides of the upper end of the support plate 21.

[0028] In the above embodiment, the elastic member 23 is arranged between the training platform 2 and the bottom plate 1, which can play a certain elastic force in the process of training, thereby reducing the impact force on the body of the trainer when falling to the ground. In the structure design, the cooperation of the plurality of guide columns 211 and the guide sleeves 11 can ensure the stability of the training platform 2 in the horizontal direction, and the training platform 2 will not be tilted.

[0029] As a preferred embodiment, the waist binder 3 comprises a waist belt, and the two ends of the waist belt are respectively provided with detachable plug-in buckle assemblies.

[0030] In the above embodiment, the waist belt is an open-loop waist belt, which can be opened under the action of an external force. When wearing, the open-loop waist belt is wrapped around the waist of the trainer, and then the plug-in buckle assemblies at both ends of the waist belt are connected. When removing, the connection of the plug-in buckle assemblies is released.

[0031] As a preferred embodiment, the rope guiding structure 5 comprises two vertical fixed strips 51 and two guide wheels 52. The two guide wheels 52 are rotatably arranged between the upper ends of the two fixed strips 51, and the two guide wheels 52 are close to each other. The rope belt 4 passes through the two guide wheels 52.

[0032] In the above embodiment, the two guide wheels 52 are relatively close to each other, so that the rope 4 can be limited in the space between the wheel grooves of the two guide wheels 52 and cannot run out of the gap between the two, thereby being able to guide the rope 4 more stably.

[0033] As a preferred embodiment, as shown in the drawings, Figure 3 The elastic tension assembly 6 includes a tension rod 61, a tensioner 62, and a bracket 63. The tension rod 61 is horizontally arranged and has two ends each provided with a bearing seat 64 that is rotatably connected to the tension rod 61. The bearing seat 64 is fixed to the upper end of the base plate 1 by a vertical column. The tensioner 62 is arranged on the upper end of the base plate 1 by the bracket 63. The tensioner 62 is provided with a through hole in the center thereof. The tension rod 61 passes through the through hole. The tensioner 62 is provided with a spiral channel 621 around the through hole. Figure 3 The channel 621 has an open end close to the through hole and a closed end. The channel 621 is provided with a piston body 622 that is sealingly connected to the inner wall of the channel 621. The piston body 622 is connected to a tension rope 65. The tension rope 65 passes out of the open end of the channel 621 and is connected to a corresponding fixing point on the tension rod 61. The two ends of the tension rod 61 are respectively detachably provided with a wire wheel 66. The wire wheel 66 is wound with a traction rope 67. One end of the traction rope 67 is connected to the other end of the corresponding rope 4.

[0034] In the above embodiment, during training, the trainer pulls the rope 4 upward after half squatting or deep squatting and jumping up. The rope 4 pulls the traction rope 67, which drives the wire wheel 66 and the tension rod 61 to rotate. During the rotation of the tension rod 61, the tension rope 65 in the channel 621 is pulled outward (i.e., pulled toward the open end of the channel 621). The piston body 622 is pulled outward by the tension rope 65. During the movement of the piston body 622, the pressure difference between the inside and outside forms a “resistance” and the resistance becomes stronger as the piston body 622 is pulled further away. The purpose of resistance training is achieved. During the falling process after jumping up, the piston body 622 moves back to the position under the action of the pressure. Overall, the structure is very ingenious and can achieve good training effect.

[0035] In the above embodiment, the bracket 63 includes two vertical strip plates 631. The two strip plates 631 are respectively fixed to the upper end of the base plate 1 and have upper ends located on the two sides of the tensioner 62. The two sides of the tensioner 62 are detachably connected to the upper ends of the two strip plates 631.

[0036] In the above embodiment, the structure of the bracket 63 allows the tensioner 62 to be taken out upward along the upper part of the bracket 63 during disassembly. The tensioner 62 is relatively convenient and fast to assemble.

[0037] In this embodiment, the tensioner 62 is shaped like a cuboid or square plate member with a certain thickness, with a central hole, and with a channel 621 inside. The two sides of the tensioner 62 are respectively attached to the inner sides of the upper ends of the two strip-shaped plates 631, and then the assembly is complete.

[0038] As a preferred embodiment, the upper ends of the two strip-shaped plates 631 are respectively provided with a clamping groove on the side close to each other, the two sides of the tensioner 62 are respectively clamped into the clamping grooves, the upper ends of the strip-shaped plates 631 are threadedly connected with a vertical fixing bolt 632, and the two sides of the tensioner 62 are respectively provided with a threaded hole, and the fixing bolt 632 is threadedly connected with the corresponding threaded hole.

[0039] In the above embodiment, after the tensioner 62 is fixed to contact the fixing bolt 632, it can be moved upward along the clamping groove and taken out.

[0040] In this embodiment, the strip-shaped plates 631 are designed in multiple groups and are distributed at intervals along the length direction of the tension rod 61. Correspondingly, multiple groups of tensioners 62 can be provided. The tensioners 62 can be selectively installed with some of the strip-shaped plates 631 or all of them. That is, the number of tensioners 62 can be increased according to the training intensity. When the intensity is low, the number is reduced, and when the intensity is high, the number is increased. The more the number of tensioners 62, the higher the upper limit of the training resistance.

[0041] As a preferred embodiment, the two ends of the tension rod 61 are respectively detachably connected with an auxiliary connecting rod 611, and the auxiliary connecting rod 611 is respectively rotatably assembled with the two bearing seats 64.

[0042] In the above embodiment, the auxiliary connecting rod 611 is designed to make the tension rod 61 easier to disassemble. When disassembled, the auxiliary connecting rod 611 and the tension rod 61 are separated, and then the connection between the tensioner 62 and the strip-shaped plate 631 is released. Then the tensioner 62 and the tension rod 61 can be moved upward and taken out. Then, the number of tensioners 62 can be appropriately increased or decreased according to the needs of use. After adaptation, the tension rod 61 and the auxiliary connecting rod 611 are assembled, and at the same time, the tensioner 62 is distributed and installed on the corresponding strip-shaped plate 631. The main design purpose is to facilitate the rapid increase and decrease of the tensioner 62.

[0043] As a preferred embodiment, the walking mechanism 7 includes a door-shaped sheet metal frame 71, a walking wheel 72, and a height adjustment bolt 73. The sheet metal frame 71 is fixed to the side end of the bottom plate 1. The walking wheel 72 is slidably arranged in the sheet metal frame 71. The height adjustment bolt 73 is vertically arranged and threadedly connected to the upper end of the sheet metal frame 71. The lower end of the height adjustment bolt 73 is rotatably connected to the upper end of the walking wheel 72.

[0044] In the above embodiment, the height adjustment bolt 73 is twisted to drive the walking wheel 72 to move up and down relative to the metal frame 71, so that the walking wheel 72 is in contact with the ground or suspended, and the operation is relatively simple.

[0045] It should be noted that the walking wheel 72 in the embodiment refers to the whole of the wheel body and the wheel frame.

[0046] As a preferred embodiment, the training platform 2 is provided with a protective fence (indicated by a in the figure) around the training platform 2.

[0047] In the above embodiment, the protective fence (hollow member) can be arranged in four directions or multiple directions of the training platform 2, so that the falling direction can be corrected in time after jumping and falling if the center of gravity is unstable, and the safety can be improved by holding hands during jumping.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A portable auxiliary jumping training device, characterized in that: The system includes a base plate (1), a training platform (2), a waist trainer (3), two ropes (4), two sets of rope guide structures (5), and two sets of elastic tension components (6). The base plate (1) has a walking mechanism (7) that can be raised and lowered or placed on the ground on both sides. The training platform (2) is installed in the middle of the upper end of the base plate (1). The two sets of rope guide structures (5) are installed on both sides of the upper end of the training platform (2). The two sets of elastic tension components (6) are installed on both sides of the upper end of the base plate (1). The two ropes (4) pass through the two sets of rope guide structures (5) one by one. One end of the rope (4) is connected to the waist trainer (3), and the other end of the rope (4) is connected to one set of elastic tension components (6) on the corresponding side.

2. The portable assisted jumping training device according to claim 1, characterized in that: The training platform (2) includes a support plate (21), a cylindrical platform body (22), and an elastic element (23). The support plate (21) is horizontally positioned above the base plate (1), and vertically extending guide columns (211) are provided around its lower end. The upper end of the base plate (1) is provided with guide sleeves (11) that are inserted into the guide columns (211) one by one. The elastic element (23) is installed between the support plate (21) and the base plate (1). Two sets of rope guide structures (5) are respectively installed on both sides of the upper end of the support plate (21).

3. The portable assisted jumping training device according to claim 1, characterized in that: The waist trainer (3) includes a waist belt, and each end of the waist belt is provided with a buckle assembly that can be detachably inserted into each other.

4. The portable assisted jumping training device according to claim 1, characterized in that: The rope guide structure (5) includes two vertically arranged and parallel spaced fixing bars (51) and two guide wheels (52). The two guide wheels (52) are respectively rotatably mounted between the upper ends of the two fixing bars (51) and are close to each other. The rope (4) passes through the two guide wheels (52).

5. A portable assisted jumping training device according to claim 1, characterized in that: The elastic tension assembly (6) includes a tension rod (61), a tensioner (62), and a bracket (63). The tension rod (61) is horizontally arranged, and its two ends are respectively equipped with bearing seats (64) that rotate with it. The bearing seats (64) are fixed to the upper end of the base plate (1) by a column. The tensioner (62) is mounted on the upper end of the base plate (1) by the bracket (63). The tensioner (62) has a through hole at its center, through which the tension rod (61) passes. The tensioner (62) has a vortex-shaped channel (621) surrounding the through hole. The channel (621) is close to... One end of the passage is open and the other end is closed. The channel (621) is provided with a piston body (622) that is sealed to its inner wall. The piston body (622) is connected to a tension rope (65). The end of the tension rope (65) away from the piston body (622) passes through one end of the channel (621) and is connected to the corresponding tie point on the tension rod (61). Both ends of the tension rod (61) are respectively equipped with spools (66). A traction rope (67) is wound on the spools (66). One end of the traction rope (67) is connected to the other end of the rope belt (4) on the corresponding side.

6. A portable auxiliary jumping training device according to claim 5, characterized in that: The bracket (63) includes two vertical strip plates (631), which are fixed to the upper end of the base plate (1) respectively, and the upper ends of the two strip plates (631) are located on both sides of the tensioner (62). The two sides of the tensioner (62) are detachably connected to the upper ends of the two strip plates (631).

7. A portable auxiliary jumping training device according to claim 6, characterized in that: The upper ends of the two strip plates (631) are respectively provided with slots on the side that are close to each other. The two sides of the tensioner (62) are respectively inserted into the slots. The upper end of the strip plate (631) is threaded with a fixing bolt (632) perpendicular to it. The two sides of the tensioner (62) are respectively provided with screw holes. The fixing bolt (632) is threadedly connected to the screw hole on the corresponding side.

8. A portable auxiliary jumping training device according to claim 5, characterized in that: The two ends of the tension rod (61) are detachably connected to auxiliary connecting rods (611), and the auxiliary connecting rods (611) are rotatably assembled with the two bearing seats (64).

9. A portable auxiliary jumping training device according to claim 1, characterized in that: The walking mechanism (7) includes a portal-shaped sheet metal frame (71), a walking wheel (72), and a height adjustment bolt (73). The sheet metal frame (71) is fixed to the side of the base plate (1). The walking wheel (72) can slide up and down in the sheet metal frame (71). The height adjustment bolt (73) is vertically arranged and threaded onto the upper end of the sheet metal frame (71). The lower end of the height adjustment bolt (73) is rotatably connected to the upper end of the walking wheel (72).

10. A portable assisted jumping training device according to any one of claims 1 to 9, characterized in that: The training platform (2) is surrounded by protective railings.