Limb movement ability recovery training device for neurology patient

Abstract

The invention provides a neurology patient limb movement ability recovery training device, and relates to the field of medical instruments. The neurology patient limb movement ability recovery training device comprises stand columns, connecting frames are fixedly connected to one sides of the outer walls of the two stand columns, a supporting bottom plate is fixedly connected to the ends, away from the stand columns, of the two connecting frames, a fixing column is fixedly connected to the top end of the supporting bottom plate, and an adapter is connected to the top end of the fixing column in a penetrating mode; and a limiting block is fixedly connected to the top end of the fixing column, a connecting joint is fixedly connected to one side of the outer wall of the adapter, and a rotating joint is rotationally connected to the inner wall of the connecting joint. The limb movement ability recovery training device for the patient in the neurology department has the advantages that muscles of the whole body can be exercised, the problem that the muscles and the limbs are not completely recovered is solved, the patient can do exercise by himself or herself without the help of medical staff, and use is more convenient.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a device for restoring the limb movement ability of neurology patients. Background Technique

[0002] With the continuous improvement of the diagnosis and treatment technology of stroke, the mortality rate of acute stroke has been greatly reduced. However, most of the surviving stroke patients are accompanied by varying degrees of speech disorders, sensory disorders, motor disorders, cognitive disorders, etc., among which hemiplegia is the most common. Early and effective rehabilitation treatment for stroke hemiplegia patients is of great significance for the restoration, improvement, and enhancement of the patients' daily living activities ability, labor ability, and quality of life.

[0003] During the existing limb rehabilitation training, it can only be carried out with the help of medical staff, which not only increases the work intensity of medical staff, but also greatly affects the normal rehabilitation training of patients. Moreover, the rehabilitation exercise of body muscle groups is not perfect. Often, only a part of the muscle groups can be exercised, which easily leads to incomplete recovery of the patient's body muscles and affects the limb recovery effect. Therefore, the technical personnel in this field provide a device for restoring the limb movement ability of neurology patients to solve the problems raised in the above background technique. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a device for restoring the limb movement ability of neurology patients, which can exercise the whole body muscles, prevent the problem of incomplete recovery of muscle limbs, and the patient can exercise by himself without the help of medical staff, making it more convenient to use.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention is realized through the following technical solutions: A device for restoring the limb movement ability of neurology patients includes a vertical column. One side of the outer wall of each of the two vertical columns is fixedly connected with a connecting frame. One end of the two connecting frames away from the vertical column is fixedly connected with a supporting bottom plate. The top of the supporting bottom plate is fixedly connected with a fixed column. The top of the fixed column penetrates and is connected with a swivel joint, and a limiting block is fixedly connected to the top of the fixed column;

[0008] One side of the outer wall of the swivel joint is fixedly connected with a connecting joint. The inner wall of the connecting joint is rotatably connected with a rotating joint. One end of the rotating joint is fixedly connected with a connecting rod. A backrest is fixedly connected to the outer wall of the connecting rod, and a handle is fixedly connected to one side of the outer wall of the connecting rod. A hook one is fixedly connected to the rear end face of the backrest, and a dumbbell plate is sleeved on the outer wall of the hook one;

[0009] Through the above technical solution, by setting the column to be closely connected with the support base through a stable connecting frame, the column and the support base work together to build a rock-solid support system for the entire device, which is sufficient to withstand various forces generated during the patient's training. Through the rotating connection structure formed by the adapter, the connecting joint and the rotating joint, the backrest can be rotated by the connecting rod under the patient's leg strength. By holding the handle, the patient hangs a dumbbell of appropriate weight on the hook, and the patient uses the leg muscle strength to drive the backrest to swing back and forth. In this process, the limit block at the top of the fixed column plays a key role. The limit block is made of extremely hard alloy steel, and its shape is precisely matched with the rotation range of the adapter, which can effectively prevent the adapter from rotating excessively and avoid safety accidents caused by improper operation.

[0010] Preferably, a plurality of fixed angle irons are fixedly connected to one side of the outer wall of the two columns, a plurality of sliding groove plates are fixedly connected to one side of the outer wall of the plurality of fixed angle irons, and a cover is fixedly connected to the top of the plurality of sliding groove plates;

[0011] Through the above technical solution, the slide plate is provided to allow the backrest to rotate flexibly within a reasonable range, and its rotation angle can be effectively limited to prevent the patient from losing balance due to excessive rotation, thereby providing reliable protection for the patient's safety.

[0012] Preferably, the bottom end of the backrest is fixedly connected to a limit rod, and both ends of the limit rod are slidably connected to the limit grooves provided on the inner wall of the slide plate;

[0013] Through the above technical solution, the limit rod connected to the bottom end of the backrest slides accurately in the limit groove of the slide plate, preventing the limit rod from detaching from the sliding track and causing injury to the patient.

[0014] Preferably, the two uprights are fixedly connected to a cross bar at the top positions through a connecting pipe, and the outer wall of the cross bar is penetrated by a wheel hub and a protection box in sequence;

[0015] Through the above technical solution, the wheel hub can rotate by arranging the cross bar.

[0016] Preferably, a stretch rope is wound around the outer wall of the wheel hub, and the wheel hub and the stretch rope are both sheathed in a protective box;

[0017] Through the above technical solution, by providing a protection box, the stretch rope and the hub are prevented from being damaged by external forces.

[0018] Preferably, one end of the stretch rope is fixedly connected to a handle, and the handle is located at the top of the backrest;

[0019] Through the above technical solution, the crossbar is firmly fixed at the top position of the two columns by a solid connecting pipe. The crossbar is made of high-strength carbon steel. The patient sits on the backrest, leans forward slightly, reaches out and holds the handle at the top of the backrest. The handle is wrapped with anti-slip rubber material to ensure that the patient will not slip due to sweating on the hands during the stretching process. The patient starts to slowly pull the handle with force. As the pulling force is applied, the stretching rope is gradually and smoothly released from the hub. The stretching rope is made of high-strength nylon fiber material, has excellent tensile strength and flexibility, and can withstand a large pulling force without breaking. The upper limb of the patient gradually extends as the stretching rope is pulled, and the hand strength exercise for the patient is carried out.

[0020] Preferably, both sides of the outer wall of the fixed column near the bottom end are fixedly connected with connecting support feet. The outer walls of the two connecting support feet are fixedly connected with a support frame. The top positions of the two support frames are fixedly connected with a footrest.

[0021] Through the above technical solution, the connecting support feet on both sides of the outer wall of the fixed column near the bottom end and the support frame are tightly fixedly connected by high-strength bolts. The support frame has sufficient strength and stability. The footrest at the top of the support frame can be used by the patient. The surface of the footrest is designed with anti-slip patterns and is made of a soft and elastic rubber material, which can not only provide comfortable support for the patient's feet, but also effectively prevent the feet from slipping during the pedaling process. The patient places the feet steadily on the footrest and holds the handle again with both hands. At this time, the patient starts to perform simple leg pedaling movements and cooperate with the upper limb to pull the handle for stretching movements. While the legs pedal downward once, the upper limb pulls the handle once. In this way, the muscles of all parts of the body are synergistically exercised during the rehabilitation training. The pedaling movements of the lower limbs and the stretching movements of the upper limbs cooperate with each other, which can not only enhance the strength of the muscles of the limbs, but also effectively improve the body's balance ability and coordination ability, promote the control and regulation of the nervous system over limb movements, and further improve the recovery effect of limb activity ability.

[0022] Preferably, on one side of the outer walls of the two columns, there are fixedly connected two hooks II. A push-pull rod is arranged on the outer walls of the two hooks II. Two anti-slip handles are sleeved on the outer wall of the push-pull rod, and dumbbell plates are clamped at both ends of the outer wall of the push-pull rod.

[0023] Through the above technical solution, by setting the anti-slip handles, the patient can smoothly remove the push-pull rod from the hook II. Dumbbell plates are clamped at both ends of the outer wall of the push-pull rod. The patient holds the push-pull rod with both hands and starts to perform up-and-down pushing movements on the backrest, so that the muscle groups of the shoulders and arms are fully exercised, and the forward flexion strength of the shoulders and the extension ability of the arms can be effectively enhanced.

[0024] Working principle: In this device, the vertical column is tightly connected to the supporting bottom plate through a stable connecting frame. The vertical column and the supporting bottom plate work together to build a rock-solid support system for the entire device, which is sufficient to withstand various forces generated during the patient's training. Through the rotational connection structure composed of the adapter, connecting joint, and rotating joint, the backrest can rotate at an angle under the patient's leg strength through the connecting rod. By holding the handle, the patient hangs dumbbell plates of appropriate weight on Hook 1, and the patient uses the leg muscle strength to drive the backrest to rock back and forth. During this process, the limit block at the top of the fixed column plays a key role. The limit block is made of high-hardness alloy steel, and its shape precisely matches the rotation range of the adapter, which can effectively prevent the adapter from rotating excessively and avoid safety accidents caused by improper operation. By setting the chute plate, the backrest can rotate flexibly within a reasonable range and can effectively limit its rotation angle to prevent the patient from losing balance due to excessive rotation, providing reliable protection for the patient's safety. The limit rod connected to the bottom end of the backrest slides precisely in the limit groove of the chute plate to prevent the situation where the limit rod disengages from the sliding track and causes injury to the patient. The cross bar is firmly fixed at the top position of the two vertical columns through a strong connecting pipe. The cross bar is made of high-strength carbon steel. The patient sits on the backrest, leans forward slightly, and reaches out to hold the handle located at the top of the backrest. The handle is wrapped with anti-slip rubber material to ensure that the patient will not slip due to sweating during the stretching process. The patient starts to slowly pull the handle with force. As the pulling force is applied, the stretching rope is gradually and smoothly released from the hub. The stretching rope is made of high-strength nylon fiber material, which has excellent tensile strength and flexibility and can withstand a large pulling force without breaking. The patient's upper limb gradually stretches as the stretching rope is pulled, exercising the patient's hand strength. The connecting feet on both sides of the outer wall at the bottom end of the fixed column are tightly fixed to the support frame through high-strength bolts. The support frame has sufficient strength and stability. The footrest at the top of the support frame can be used by the patient. The surface of the footrest is designed with anti-slip patterns and is made of soft and elastic rubber material, which can not only provide comfortable support for the patient's feet but also effectively prevent the feet from slipping during pedaling. The patient places both feet steadily on the footrest and holds the handle again with both hands.At this time, the patient begins to perform simple leg pedaling movements and cooperate with the upper limbs to pull the handle for stretching. While the legs pedal downward once, the upper limbs pull the handle once. In this way, the muscles of all parts of the body are synergistically exercised during the rehabilitation training. The pedaling movements of the lower limbs and the stretching movements of the upper limbs cooperate with each other, which can not only enhance the strength of the muscles of the limbs, but also effectively improve the body's balance ability and coordination ability, promote the control and regulation of limb movement by the nervous system, and further enhance the recovery effect of limb movement ability. By setting anti-slip handles, the patient can smoothly remove the push rod from hook two. Dumbbell plates are clamped at both ends of the outer wall of the push rod. The patient holds the push rod with both hands and starts to perform up-and-down pushing movements on the backrest, so that the muscle groups of the shoulders and arms are fully exercised, and the forward flexion strength of the shoulders and the extension ability of the arms can be effectively enhanced.

[0025] (III) Beneficial Effects

[0026] The present invention provides a training device for the recovery of limb movement ability of neurology patients. It has the following

[0027] Beneficial effects:

[0028] 1. The present invention provides a training device for the recovery of limb movement ability of neurology patients. This training device designs diverse training methods for different muscle groups of the upper limbs, lower limbs and back. The whole-body coordinated training can effectively improve the body balance and coordination ability, and help the nervous system to reconstruct the precise control and regulation mechanism of limb movement, which has a significant promoting effect on the overall recovery of limb movement ability, improves the recovery efficiency, and accelerates the rehabilitation process of limb movement function.

[0029] 2. The present invention provides a training device for the recovery of limb movement ability of neurology patients. By clamping dumbbell plates of different weights at both ends of hook one and the push rod, the patient can flexibly adjust the training intensity according to their own recovery status and training goals. For patients with weak strength in the initial stage of rehabilitation, lighter dumbbell plates can be selected. As the body function recovers, the weight of the dumbbell plates can be gradually increased to meet the training needs at different stages, which is convenient to use.

[0030] 3. The present invention provides a training device for the recovery of limb movement ability of neurology patients. This device is provided with multiple safety guarantee structures. When the backrest rotates, the limiting rod slides in the limiting groove opened inside the chute plate, accurately restricting the rotation range of the backrest to prevent the patient from losing balance and falling due to excessive rotation. The limiting block at the top of the fixed column restricts the rotation angle of the swivel joint to avoid danger caused by excessive shaking amplitude of the backrest, comprehensively ensuring the safety of the patient during the training process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 Schematic diagram of the multi-angle three-dimensional structure of the present invention;

[0033] Figure 3 Schematic diagram of the connection structure of the limiting rod of the present invention;

[0034] Figure 4 Schematic diagram of the connection structure of the connecting support feet of the present invention;

[0035] Figure 5 Schematic diagram of the connection structure of the wheel hub of the present invention;

[0036] Figure 6 For the present invention Figure 4 Enlarged structure schematic diagram at position A in

[0037] Among them, 1, upright column; 2, connecting frame; 3, support bottom plate; 4, fixed column; 5, swivel joint; 6, limiting block; 7, connecting joint; 8, rotating joint; 9, connecting rod; 10, backrest; 11, hook one; 12, dumbbell plate; 13, handle; 14, limiting rod; 15, chute plate; 16, cover; 17, fixed angle iron; 18, cross bar; 19, connecting pipe; 20, protection box; 21, stretching rope; 22, wheel hub; 23, handle; 24, connecting support foot; 25, support frame; 26, foot pedal; 27, limiting groove; 28, hook two; 29, push-pull rod; 30, anti-slip handle. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. In the description of the present application, it should be noted that the terms used herein are only for the purpose of describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. For the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] Embodiment 1:

[0040] As Figures 1-6 shown, an embodiment of the present invention provides a training device for restoring the limb movement ability of neurology patients, including a column 1. On one side of the outer walls of the two columns 1, connecting frames 2 are fixedly connected. At the ends of the two connecting frames 2 far from the columns 1, a support bottom plate 3 is fixedly connected. At the top of the support bottom plate 3, a fixed column 4 is fixedly connected. The top of the fixed column 4 penetrates and is connected with a swivel joint 5, and a limiting block 6 is fixedly connected to the top of the fixed column 4;

[0041] On one side of the outer wall of the swivel joint 5, a connecting section 7 is fixedly connected. Inside the connecting section 7, a rotating section 8 is rotatably connected. At one end of the rotating section 8, a connecting rod 9 is fixedly connected. On the outer wall of the connecting rod 9, a backrest 10 is fixedly connected. On one side of the outer wall of the connecting rod 9, a handle 13 is fixedly connected. On the rear end face of the backrest 10, a hook one 11 is fixedly connected. A dumbbell plate 12 is sleeved on the outer wall of the hook one 11. By arranging that the column 1 is tightly connected to the support bottom plate 3 through the stable connecting frame 2, the column 1 and the support bottom plate 3 cooperate to build a rock-solid support system for the whole device, which is sufficient to bear various acting forces generated during the patient's training. Through the rotating connection structure formed by the swivel joint 5, the connecting section 7 and the rotating section 8, the backrest 10 can rotate the angle under the patient's leg strength through the connecting rod 9. By holding the handle 13, the patient hangs a dumbbell plate 12 with an appropriate weight on the hook one 11, and the patient uses the leg muscle strength to drive the backrest 10 to swing back and forth. In this process, the limiting block 6 at the top of the fixed column 4 plays a key role. The limiting block 6 is made of high-hardness alloy steel, and its shape is precisely matched with the rotation range of the swivel joint 5, which can effectively prevent the swivel joint 5 from rotating excessively and avoid safety accidents caused by improper operation.

[0042] Embodiment 2: On one side of the outer walls of two vertical columns 1, a plurality of fixed angle irons 17 are fixedly connected. On one side of the outer walls of the plurality of fixed angle irons 17, a chute plate 15 is fixedly connected. On the top ends of the plurality of chute plates 15, a cover 16 is fixedly connected. By providing the chute plate 15, the backrest 10 can rotate flexibly within a reasonable range and can effectively limit its rotation angle, preventing the patient from losing balance due to excessive rotation and providing reliable protection for the safety of the patient. At the bottom end of the backrest 10, a limiting rod 14 is fixedly connected. Both ends of the limiting rod 14 are slidably connected in a limiting groove 27 formed in the inner wall of the chute plate 15. By accurately sliding the limiting rod 14 connected to the bottom end of the backrest 10 in the limiting groove 27 of the chute plate 15, the situation where the limiting rod 14 disengages from the sliding track and causes injury to the patient is prevented. At the position near the top of the two vertical columns 1, a cross bar 18 is fixedly connected through a connecting pipe 19. The outer wall of the cross bar 18 sequentially penetrates through a hub 22 and a protection box 20. By providing the cross bar 18, the hub 22 can rotate. A stretching rope 21 is wound around the outer wall of the hub 22, and both the hub 22 and the stretching rope 21 are sleeved inside the protection box 20. By providing the protection box 20, the stretching rope 21 and the hub 22 are prevented from being damaged by external forces. One end of the stretching rope 21 is fixedly connected to a handle 23, and the handle 23 is located at the top end of the backrest 10. The cross bar 18 is firmly fixed at the position near the top of the two vertical columns 1 through the firm connecting pipe 19. The cross bar 18 is made of high-strength carbon steel. When the patient sits on the backrest 10, leans forward slightly, and reaches out to hold the handle 23 located at the top end of the backrest 10, the handle 23 is wrapped with anti-slip rubber material to ensure that the patient will not slip due to sweating on the hands during the stretching process. The patient starts to slowly pull the handle 23 with force. As the pulling force is applied, the stretching rope 21 is gradually and smoothly released from the hub 22. The stretching rope 21 is made of high-strength nylon fiber material, has excellent tensile strength and flexibility, and can withstand a large pulling force without breaking. The upper limb of the patient gradually extends as the stretching rope 21 is pulled, performing hand strength exercise for the patient. On both sides of the outer wall at the position near the bottom end of the fixed column 4, connecting feet 24 are fixedly connected. On the outer walls of the two connecting feet 24, a support frame 25 is fixedly connected. At the top end positions of the two support frames 25, a footrest 26 is fixedly connected. The connecting feet 24 on both sides of the outer wall at the position near the bottom end of the fixed column 4 and the support frame 25 are tightly fixedly connected by high-strength bolts. The support frame 25 has sufficient strength and stability. The footrest 26 at the top end of the support frame 25 can be used by the patient. The surface of the footrest 26 is designed with anti-slip patterns and is made of a soft and elastic rubber material, which can not only provide comfortable support for the patient's feet but also effectively prevent the feet from slipping during the pedaling process. The patient places the feet steadily on the footrest 26 and holds the handle 13 with both hands again.At this time, the patient begins to perform simple leg pedaling movements and cooperate with the upper limbs to pull the handle 23 for stretching. While the legs pedal downward once, the upper limbs pull the handle 23 once. In this way, the muscles of all parts of the body are synergistically exercised during the rehabilitation training. The pedaling movements of the lower limbs and the stretching movements of the upper limbs cooperate with each other, which can not only enhance the strength of the muscles of the limbs, but also effectively improve the body's balance ability and coordination ability, promote the control and regulation of the nervous system over limb movements, and further improve the recovery effect of limb movement ability. On one side of the outer wall of the two columns 1, there is a fixed connection with a second hook 28. On the outer wall of the two second hooks 28, there is a push-pull rod 29. The outer wall of the push-pull rod 29 is sleeved with two anti-slip handles 30, and both ends of the outer wall of the push-pull rod 29 are clamped with dumbbell plates 12. By setting the anti-slip handles 30, the patient can smoothly remove the push-pull rod 29 from the second hook 28. Dumbbell plates 12 are clamped at both ends of the outer wall of the push-pull rod 29. The patient holds the push-pull rod 29 with both hands and starts to perform upward and downward pushing movements on the backrest 10, so that the muscle groups of the shoulders and arms can be fully exercised, and the forward flexion strength of the shoulders and the extension ability of the arms can be effectively enhanced.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limb activity recovery training device for patients in neurology, comprising a column (1), characterized in that: One side of the outer wall of the two uprights (1) is fixedly connected to a connecting frame (2); one end of the two connecting frames (2) away from the uprights (1) is fixedly connected to a supporting base plate (3); the top of the supporting base plate (3) is fixedly connected to a fixing column (4); the top of the fixing column (4) is penetrated by an adapter (5), and the top of the fixing column (4) is fixedly connected to a limiting block (6); one side of the outer wall of the adapter (5) is fixedly connected to a connecting joint (7); the inner wall of the connecting joint (7) is rotatably connected to a rotating joint (8); one end of the rotating joint (8) is fixedly connected to a connecting rod (9); the outer wall of the connecting rod (9) is fixedly connected to a backrest (10); and one side of the outer wall of the connecting rod (9) is fixedly connected to a handle (13); the rear end surface of the backrest (10) is fixedly connected to a hook 1 (11); the outer wall of the hook 1 (11) is sleeved with a dumbbell plate (12).

2. A limb activity recovery training device for neurology patients according to claim 1, characterized in that: A plurality of fixed angle irons (17) are fixedly connected to one side of the outer wall of the two uprights (1), a chute plate (15) is fixedly connected to one side of the outer wall of the plurality of fixed angle irons (17), and a cover (16) is fixedly connected to the top end of the plurality of chute plates (15).

3. A limb activity recovery training device for neurology patients according to claim 1, characterized in that: The bottom end of the backrest (10) is fixedly connected to a limiting rod (14), and both ends of the limiting rod (14) are slidably connected to limiting grooves (27) provided on the inner wall of the slide plate (15).

4. The limb activity recovery training device for neurology patients according to claim 1, characterized in that: The two uprights (1) are fixedly connected to a cross bar (18) at the top end through a connecting pipe (19), and the outer wall of the cross bar (18) is penetrated by a wheel hub (22) and a protection box (20) in sequence.

5. A limb activity recovery training device for neurology patients according to claim 4, characterized in that: A stretching rope (21) is wound around the outer wall of the wheel hub (22), and both the wheel hub (22) and the stretching rope (21) are sleeved in a protective box (20).

6. A limb activity recovery training device for neurology patients according to claim 5, characterized in that: One end of the stretch rope (21) is fixedly connected to a handle (23), and the handle (23) is located at the top end of the backrest (10).

7. The limb activity recovery training device for neurology patients according to claim 1, characterized in that: The fixing column (4) is fixedly connected to connecting legs (24) on both sides of the outer wall near the bottom end, the outer walls of the two connecting legs (24) are fixedly connected to support frames (25), and the top ends of the two support frames (25) are fixedly connected to foot pedals (26).

8. The limb activity recovery training device for neurology patients according to claim 1, characterized in that: A hook 2 (28) is fixedly connected to one side of the outer wall of the two uprights (1), and a push-pull rod (29) is arranged on the outer wall of the two hooks (28). Two anti-slip handles (30) are sleeved on the outer wall of the push-pull rod (29), and dumbbell plates (12) are clamped at both ends of the outer wall of the push-pull rod (29).

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