A pedal rehabilitation device for elderly people

Abstract

The present invention relates to the technical field of rehabilitation training equipment, specifically a pedal rehabilitation device for elderly rehabilitation, including a training frame that is suspended in a cylindrical shape, and the central axis of the training frame is horizontally arranged, and the left and right ends of the training frame are provided with pedal mechanisms that rotate around the central axis and weight plates that are sleeved at the left and right ends of the central axis of the training frame; the pedal mechanism includes a pedal, a transmission tube that is rotatably connected to one end of the pedal, and a mode adjustment group that is slidably connected to the lower end of the transmission tube and is used to adjust the size of the pedal rotation radius. The present invention completes the free switching of leg-kicking circular motion and up and down pedaling mode by setting a linkage structure between the mode adjustment group and the elastic member, and mainly adjusts the radius of the leg-kicking circular motion by adjusting the angle between the transmission tube and the rotating shaft, thereby adjusting the training intensity, so as to achieve the effect of adapting to the training needs of patients at different rehabilitation stages.

Description

Technical Field

[0001] The invention relates to the technical field of rehabilitation training equipment, in particular to a pedal rehabilitation device for elderly people. Background Art

[0002] Application number CN202322068927.6 discloses a pedal rehabilitation device for elderly people, which includes a bottom plate, a support seat is fixedly installed on the top of the bottom plate, a rotating shaft is rotatably installed on the support seat, pedal plates are arranged at both ends of the rotating shaft, and limit rings are arranged on the two pedal plates, which are used to fix the foot surface, and the two pedal plates are symmetrically arranged, and two reciprocating mechanisms are connected to the rotating shaft, and the two reciprocating mechanisms are connected to the same lifting plate, and the lifting plate is slidably installed inside the groove, and a counterweight mechanism is arranged on the lifting plate. The design is simple in structure, easy to use, can adjust the intensity of exercise, and can meet the needs of exercise use.

[0003] However, the above patent uses a fixed trajectory and a single resistance mode for rehabilitation training, which is not suitable for all elderly people. For example, if the training mode is single, it supports circular motion and cannot be well applied to patients with inflexible joints to dynamically adjust the training intensity; for example, the resistance adjustment is inconvenient, and the resistance is adjusted by replacing weights or mechanical locking, which is cumbersome and takes up a lot of space. Therefore, it is necessary to improve the adaptability and controllability of rehabilitation training of rehabilitation equipment in order to meet the different needs of rehabilitation training for the elderly. Summary of the invention

[0004] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a pedal rehabilitation device for elderly people to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a pedal rehabilitation device for elderly people, comprising a training frame which is suspended in a cylindrical shape, and the central axis of the training frame is horizontally arranged, and the left and right ends of the training frame are both provided with pedal mechanisms rotating around the central axis thereof, and weight plates sleeved at the left and right ends of the central axis of the training frame; the pedal mechanism comprises a pedal, a transmission tube which is rotatably connected to one end of the pedal, and a mode adjustment group which is slidably connected to the lower end of the transmission tube and is used to adjust the size of the rotation radius of the pedal; the central axis of the training frame is coaxially connected with a rotating shaft for supporting the rotation of the pedal mechanism, the middle part of the transmission tube is in a disconnected state, and an elastic member is fixedly arranged between the openings on the left and right sides, so as to form a state in which the transmission tube is bent along the wide surface of the elastic member; The mode adjustment group includes an adjustment sleeve that is limitedly sleeved and rotates with the end of the rotating shaft, a transmission gear coaxially sleeved with the lower end of the transmission tube, and a pair of chains sleeved between the transmission gear and one end of the pedal; the adjustment sleeve is a semicircular block and a rack meshing with the transmission gear is embedded in the middle of its arc surface, and arc-shaped bosses are provided on the arc surface of the adjustment sleeve and on both sides of the rack, and guide rings for guiding and limiting the deflection of the lower end of the transmission tube around the central axis of the adjustment sleeve are provided on the side surfaces of the arc-shaped bosses, and nuts for clamping the transmission tube are provided on the front and rear sides of the adjustment sleeve; when the lower end of the transmission tube is placed on the upper end of the adjustment sleeve, the maximum radius of pedal rotation is formed, and at this time, the maximum intensity of leg kicking circle training is achieved; by moving the transmission tube to the middle of the arc surface of the adjustment sleeve, that is, adjusting the pedal rotation radius to gradually decrease, thereby weakening the intensity of leg kicking circle training; when the transmission tube is rotated to a horizontal state, the deformation ability of the elastic member is utilized to switch to a straight up and down pedaling training mode.

[0006] As a further improvement of the technical solution, a foot strap is fixed between the left and right ends of the pedal, a pedal shaft is rotatably inserted at the center of the left and right ends of the pedal, and one end of the pedal shaft is sleeved with a connecting block that is rotatably engaged with the opening at the upper end of the transmission tube.

[0007] As a further improvement of the present technical solution, the transmission gear is clamped in the opening at the lower end of the transmission tube and is connected through a sliding shaft. The guide ring is arc-shaped and is arranged coaxially with the adjusting sleeve. The two ends of the sliding shaft correspond to the slots that pass through the pull rod guide ring, and the nut is threadedly connected to the end of the sliding shaft.

[0008] As a further improvement of the present technical solution, the chain is placed inside the transmission tube, sprockets are coaxially embedded at both ends of the transmission gear, sprockets are embedded at the outer end of the connecting block and on both sides of the inner wall of the transmission tube, and the upper and lower ends of the chain are correspondingly engaged with the sprocket sleeves located above and below.

[0009] As a further improvement of the technical solution, guide shafts are inserted between the inner walls of the upper and lower openings of the transmission tube, the axial direction of the guide shafts is the same as the axial direction of the sprocket, and the outer sides of the upper and lower ends of the chain are in sliding contact with a number of corresponding guide shafts.

[0010] As a further improvement of the technical solution, the elastic member is made of spring steel in a straight sheet shape with a thickness of 1-2 mm, and the upper and lower ends of the elastic member are correspondingly welded to the upper and lower surfaces of the middle opening of the transmission tube.

[0011] As a further improvement of the technical solution, the counterweight plate is threadedly connected to the rotating shaft, and the outer side surface of the counterweight plate is provided with a plurality of slots at equal intervals in an annular shape, and the number of the slots is an even number, and the counterweight bars are clamped in the slots.

[0012] As a further improvement of the technical solution, the outer diameter of the weight plate is smaller than the inner diameter of the training frame, and the outer arc surface of the weight plate is annularly embedded with a plurality of rolling elements at equal intervals, and the rolling elements are rollingly connected to the inner wall of the training frame.

[0013] As a further improvement of the technical solution, support frames are folded and arranged at the front and rear middle parts of the training frame, and the support frames include a support plate rotatably connected to the side wall of the training frame and a pair of telescopic rods sleeved on the lower end of the support plate; a sleeve with the same axial direction as the training frame is welded to the lower end of the support plate, the telescopic rod is inserted and slidably connected to one end of the sleeve, and the side walls at both ends of the sleeve are threadedly connected with clamping bolts that penetrate into the interior thereof.

[0014] As a further improvement of the technical solution, a plurality of through grooves are formed through the left and right side walls of the support plate, and the counterweight bars are adapted to be plugged into the through grooves; a positioning frame is tightly fitted inside the training frame, and the positioning frame has a concentric ring frame structure and a bearing is sleeved on its inner ring, and the middle part of the rotating shaft is tightly sleeved with the bearing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The pedal rehabilitation device for elderly people can freely switch between the leg-kicking circular motion and the up and down pedaling mode by setting the linkage structure of the mode adjustment group and the elastic member. The radius of the leg-kicking circular motion is adjusted mainly by the angle between the transmission tube and the rotating shaft, and the training intensity is adjusted to achieve the effect of adapting to the training needs of patients at different rehabilitation stages.

[0016] 2. The pedal rehabilitation device for elderly people can quickly increase or decrease the weight bar through the modular design of the weight plate and the card slot, so as to achieve the effect of personalized adjustment of training resistance and enhancement of muscle endurance without taking up space.

[0017] 3. The pedal rehabilitation device for elderly people can flexibly adjust the storage and floor space of the device through the folding structure of the support frame and the telescopic structure of the telescopic rod, so as to adapt to the use in multiple scenarios of home and rehabilitation center. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art, under the guidance of the present invention, select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0019] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention.

[0020] Figure 2 For the present invention Figure 1 main view.

[0021] Figure 3 For the present invention Figure 1 Side view of.

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the pedal mechanism mode switching state.

[0023] Figure 5 It is an assembly structure diagram of the pedal mechanism of the present invention.

[0024] Figure 6 It is a plan view of the pedal mechanism assembly of the present invention.

[0025] Figure 7 The following is a diagram of the assembly and disassembly of the training frame of the present invention.

[0026] Figure 8 It is a disassembled diagram of the pedal mechanism assembly of the present invention.

[0027] Fig. 9 It is a disassembled view of the pedal and transmission tube assembly of the present invention.

[0028] Fig.10 The following is a diagram of the disassembly of the mode adjustment group assembly of the present invention.

[0029] The meaning of each number in the figure is: 100, training frame; 101, articulated table; 110, supporting frame; 111, supporting plate; 1111, limiting block; 1112, sleeve; 1113, through slot; 112, telescopic rod; 113, foot pad; 114, clamping bolt; 120, positioning frame; 130, bearing; 200, pedal mechanism; 210, pedal; 211, foot strap; 212, pedal shaft; 213, connecting block; 220, transmission tube; 221, elastic member; 222, sliding shaft; 223, guide shaft; 230, mode adjustment group; 231, adjustment sleeve; 2311, guide ring; 2312, rack; 232, transmission gear; 233, chain; 234, sprocket; 240, rotating shaft; 300, counterweight plate; 301, slot; 310, counterweight bar; 320, rolling element. DETAILED DESCRIPTION

[0030] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, the technical personnel's conception is based on any possible variation of the present invention, which should be regarded as belonging to the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which means direct connection and indirect connection through an intermediate medium.

[0031] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0032] See also Figure 1-Figure 10 As shown, the present invention provides a pedal rehabilitation device for elderly rehabilitation, including a training frame 100 that is suspended in a cylindrical shape, and the central axis of the training frame 100 is horizontally arranged. The left and right ends of the training frame 100 are provided with pedal mechanisms 200 that rotate around the central axis thereof, and weight plates 300 that are sleeved at the left and right ends of the central axis of the training frame 100; the pedal mechanism 200 includes a pedal 210, a transmission tube 220 that is rotatably connected to one end of the pedal 210, and a mode adjustment group 230 that is slidably connected to the lower end of the transmission tube 220 and is used to adjust the rotation radius of the pedal 210, so as to adjust the intensity of training and be suitable for different rehabilitation cycles of users; the central axis of the training frame 100 is coaxially connected with a rotating shaft 240 for supporting the rotation of the pedal mechanism 200.

[0033] In addition, the middle part of the transmission tube 220 is disconnected and an elastic member 221 is fixedly arranged between the openings on the left and right sides. The elastic member 221 is made of spring steel in a straight sheet shape and has a thickness of 1-2mm. The upper and lower ends of the elastic member 221 are correspondingly welded to the upper and lower surfaces of the middle opening of the transmission tube 220 to form a state in which the transmission tube 220 is bent along the wide surface of the elastic member 221; so that when the transmission tube 220 is flattened, pedaling training can be formed by bending the transmission tube 220 up and down, which is suitable for users with insufficient joint flexibility to train first, and when the joint flexibility is improved, switch to pedal circle training, and then step by step increase the training intensity, thereby forming a complete set of leg and foot rehabilitation training suitable for elderly users to sit.

[0034] Specifically, the mode adjustment group 230 includes an adjustment sleeve 231 that is limitedly sleeved and rotated with the end of the rotating shaft 240, a transmission gear 232 that is coaxially sleeved with the lower end of the transmission tube 220, and a pair of chains 233 that are sleeved between the transmission gear 232 and one end of the pedal 210; the adjustment sleeve 231 is a semicircular block and a rack 2312 that meshes with the transmission gear 232 is embedded in the middle of its arc surface, and arc-shaped bosses are provided on the arc surface of the adjustment sleeve 231 and on both sides of the rack 2312, and a guide ring 2311 for guiding and limiting the deflection of the lower end of the transmission tube 220 around the central axis of the adjustment sleeve 231 is provided on the side of the arc-shaped boss, and nuts for clamping the transmission tube 220 are provided on the front and rear sides of the adjustment sleeve 231.

[0035] By adjusting the meshing of the rack 2312 on the arc surface of the sleeve 231 and the transmission gear 232, the user can manually adjust the position of the transmission tube 220 in the guide ring 2311, and the chain 233 is driven to move by the rotation of the transmission gear 232, thereby driving the pedal 210 to automatically rotate with the transmission tube 220 to ensure a horizontal adjustment position for normal pedaling by the user, thereby achieving continuous adjustment of the rotation radius of the pedal 210, so that the user can choose different training intensities according to his or her own rehabilitation situation.

[0036] When the lower end of the transmission tube 220 is located at the upper end of the adjustment sleeve 231, the pedal 210 performs a circular motion with a maximum radius, which is suitable for high-intensity leg-pushing training; when the transmission tube 220 slides to the middle of the adjustment sleeve 231, the radius decreases and the training intensity decreases; when the transmission tube 220 rotates to a horizontal state, the elastic member 221 is bent and deformed to switch the pedal 210 to an up and down reciprocating pedaling mode, which is suitable for patients in the early stages of lower limb strength recovery.

[0037] Further, such as Figure 7 As shown, support frames 110 are foldably provided at the front and rear middle parts of the training frame 100, and the support frames 110 include support plates 111 rotatably connected to the side walls of the training frame 100 and a pair of telescopic rods 112 sleeved on the lower ends of the support plates 111; hinge platforms 101 are symmetrically welded at the front and rear middle parts of the training frame 100, and the upper ends of the support plates 111 are rotatably connected to the hinge platforms 101 by pins, and a limit block 1111 is protruded from the middle part of the upper end of the support plate 111, which is used to resist the outer wall of the training frame 100 so that the support plates 111 are unfolded to form a stable supporting state; the folding design of the support plates 111 and the training frame 100 is convenient for storage and use.

[0038] The lower end of the support plate 111 is welded with a sleeve 1112 with the same axial direction as the training frame 100. The telescopic rod 112 is inserted and slid with one end of the sleeve 1112. The side walls of the sleeve 1112 are threadedly connected with clamping bolts 114 that penetrate into the inside. The telescopic rod 112 is telescoped to adjust the ground support range of the training frame 100 so as to adapt to the terrain and space and adapt to different usage scenarios; the clamping bolt 114 squeezes the telescopic rod 112 to achieve stable support. The outer end of the telescopic rod 112 is provided with a foot pad 113 made of plastic to play a shock-absorbing and protective role.

[0039] Further, such as Figure 8-Figure 10 As shown, a foot strap 211 is fixedly provided between the left and right ends of the pedal 210, which is used to wrap around the instep and better stabilize the foot for training; a pedal shaft 212 is rotatably inserted at the center of the left and right ends of the pedal 210, and one end of the pedal shaft 212 is sleeved with a connecting block 213 that is rotatably engaged with the opening at the upper end of the transmission tube 220; the transmission gear 232 is engaged in the opening at the lower end of the transmission tube 220 and is connected through the sliding shaft 222, and the guide ring 2311 is arc-shaped and is arranged with the same central axis as the adjusting sleeve 231, so that the transmission tube 220 rotates around the central axis of the adjusting sleeve 231 and adjusts its position along the outer arc surface of the guide ring 2311; the two ends of the sliding shaft 222 correspond to the slots that penetrate the pull rod guide ring 2311, and the nut is threadedly connected to the end of the sliding shaft 222; the guide ring 2311 is clamped by tightening the two nuts to clamp the transmission tube 220, so that its positioning is stable, and the rotation radius of the positioning pedal 210 is determined.

[0040] Furthermore, the chain 233 is placed inside the transmission tube 220, and sprockets 234 are coaxially embedded at both ends of the transmission gear 232. Sprockets 234 are embedded at the outer end of the connecting block 213 and on both sides of the inner wall of the transmission tube 220. The upper and lower ends of the chain 233 are correspondingly engaged with the sprockets 234 located above and below; when the transmission tube 220 is displaced, the pedal 210 and the transmission tube 220 are synchronously driven to change their angles through the transmission of the chain 233, and the pedal 210 can be kept horizontally set for sitting and stepping.

[0041] Furthermore, a guide shaft 223 is inserted between the inner walls of the upper and lower openings of the transmission tube 220. The axial direction of the guide shaft 223 is the same as the axial direction of the sprocket 234. The outer sides of the upper and lower ends of the chain 233 are in sliding contact with a number of corresponding guide shafts 223, so that the chain 233 reduces wear when passing through the upper and lower openings of the transmission tube 220.

[0042] Specifically, Figure 6-Figure 8As shown, the counterweight plate 300 is threadedly connected to the rotating shaft 240, and a blocking piece for blocking the counterweight plate 300 is welded on the side wall of the rotating shaft 240 near the end. A concave hole is opened in the center of the vertical end face of the adjusting sleeve 231, and the concave hole is sleeved and rotated with the end of the rotating shaft 240 to locate the position of the counterweight plate 300; the adjusting sleeve 231 and the rotating shaft 240 are connected by pins passing through the side wall, so that a pair of transmission pipes 220 alternately drive the rotating shaft 240 to stably rotate; the outer side surface of the counterweight plate 300 is annularly provided with a plurality of slots 301 at equal intervals, and the number of the slots 301 is an even number, and a counterweight bar 310 is clamped in the slot 301; a round hole is opened in the middle of the slot 301 to insert a finger to take out the counterweight bar 310.

[0043] The weight plate 300 is symmetrically mounted with weight bars 310 through the slots 301 , and the weight bars 310 are made of lead blocks; the user can increase or decrease the number of weight bars 310 according to needs, thereby adjusting the rotational inertia of the rotating shaft 240 to achieve personalized adjustment of the training resistance.

[0044] Furthermore, the outer diameter of the weight plate 300 is smaller than the inner diameter of the training rack 100, and a plurality of rolling elements 320 are embedded in the outer arc surface of the weight plate 300 in an annular shape and at equal intervals, and the rolling elements 320 are rollingly connected with the inner side wall of the training rack 100. The rolling elements 320 are balls or rollers, and the axial direction of the rollers is the same as the axial direction of the weight plate 300; the rolling elements 320 are in rolling contact with the inner side wall of the training rack 100, ensuring that the weight plate 300 rotates smoothly, which is conducive to reducing friction loss.

[0045] Furthermore, a plurality of through grooves 1113 are formed through the left and right side walls of the support plate 111, and the counterweight strips 310 are adapted to be plugged into the through grooves 1113 so as to accommodate the counterweight strips 310 for easy access at any time and to help stabilize the support plate 111 to suspend the training frame 100; a positioning frame 120 is tightly fitted inside the training frame 100, and the positioning frame 120 is a concentric ring frame structure and a bearing 130 is sleeved on its inner ring, and the middle part of the rotating shaft 240 is tightly sleeved with the bearing 130; the cooperation between the positioning frame 120 and the bearing 130 ensures the concentric rotation of the rotating shaft 240 to avoid eccentric vibration.

[0046] The pedal rehabilitation device for elderly rehabilitation of the present invention can select different modes according to one's own situation when in use, such as the vertical pedaling mode: when the transmission tube 220 is turned to the horizontal direction, and the nuts at both ends of the sliding shaft 222 are tightened to fix the transmission tube 220, the user can sit and put both feet on the pull rod pedal 210, and step up and down alternately left and right. The elastic deformation of the elastic member 221 causes the transmission tube 220 to swing up and down and reciprocate, simulating stepping training, which is suitable for training users with inflexible joints.

[0047] For example, in circular leg movement: the transmission tube 220 is turned vertically and fixed, and the user's feet are fixed to the foot straps 211. When stepping on the pedal 210, the transmission tube 220 drives the rotating shaft 240 to rotate around the central axis of the training frame 100, that is, switching to the training of pedaling in circles; in addition, by adding a weight bar 310 to the weight plate 300, the rotational inertia of the rotating shaft 240 is adjusted to achieve personalized adjustment of the training resistance.

[0048] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A pedal rehabilitation device for elderly people, comprising a cylindrical suspended training frame, wherein the central axis of the training frame is horizontally arranged, and the characteristics are: The left and right ends of the training frame are both provided with pedal mechanisms rotating around the central axis thereof and weight plates sleeved at the left and right ends of the central axis of the training frame; the pedal mechanism comprises a pedal, a transmission tube rotatably connected to one end of the pedal, and a mode adjustment group slidably connected to the lower end of the transmission tube and used to adjust the size of the rotation radius of the pedal; the central axis of the training frame is coaxially connected with a rotating shaft for supporting the rotation of the pedal mechanism, the middle part of the transmission tube is in a disconnected state, and an elastic member is fixedly provided between the openings on the left and right sides, so as to form a state in which the transmission tube is bent along the wide surface of the elastic member; The mode adjustment group includes an adjustment sleeve that is limitedly sleeved and rotates with the end of the rotating shaft, a transmission gear that is coaxially sleeved with the lower end of the transmission tube, and a pair of chains sleeved between the transmission gear and one end of the pedal; the adjustment sleeve is a semicircular block and a rack that meshes with the transmission gear is embedded in the middle of its arc surface, and arc-shaped bosses are provided on the arc surface of the adjustment sleeve and on both sides of the rack, and a guide ring for guiding and limiting the deflection of the lower end of the transmission tube around the central axis of the adjustment sleeve is provided on the side of the arc-shaped boss, and nuts for clamping the transmission tube are provided on the front and rear sides of the adjustment sleeve; the transmission tube is adapted to the adjustment sleeve, and the training intensity is adjusted by moving the position of the transmission tube.

2. The pedal rehabilitation device for elderly people according to claim 1, characterized in that: A foot strap is fixed between the left and right ends of the pedal, a pedal shaft is rotatably plugged at the center of the left and right ends of the pedal, and one end of the pedal shaft is sleeved with a connecting block rotatably engaged with the upper end opening of the transmission tube.

3. The pedal rehabilitation device for elderly people according to claim 2, characterized in that: The transmission gear is clamped in the opening at the lower end of the transmission tube and is connected through a sliding shaft. The guide ring is arc-shaped and is arranged coaxially with the adjustment sleeve. The two ends of the sliding shaft correspond to the slots that pass through the pull rod guide ring, and the nut is threadedly connected to the end of the sliding shaft.

4. The pedal rehabilitation device for elderly people according to claim 3, characterized in that: The chain is placed inside the transmission tube, sprockets are coaxially embedded at both ends of the transmission gear, sprockets are embedded at the outer end of the connecting block and on both sides of the inner wall of the transmission tube, and the upper and lower ends of the chain are correspondingly engaged with the sprocket sleeves located above and below.

5. The pedal rehabilitation device for elderly people according to claim 4, characterized in that: A guide shaft is inserted between the inner walls of the upper and lower openings of the transmission tube. The axial direction of the guide shaft is the same as that of the sprocket. The outer sides of the upper and lower ends of the chain are in sliding contact with a plurality of guide shafts.

6. The pedal rehabilitation device for elderly people according to claim 5, characterized in that: The elastic member is made of spring steel in a straight sheet shape with a thickness of 1-2 mm. The upper and lower ends of the elastic member are correspondingly welded to the upper and lower surfaces of the middle opening of the transmission tube.

7. The pedal rehabilitation device for elderly people according to claim 6, characterized in that: The counterweight plate is threadedly connected to the rotating shaft. The outer side surface of the counterweight plate is annularly provided with a plurality of slots at equal intervals, and the number of the slots is an even number. Counterweight bars are clamped in the slots.

8. The pedal rehabilitation device for elderly people according to claim 7, characterized in that: The outer diameter of the weight plate is smaller than the inner diameter of the training frame, and a plurality of rolling elements are embedded in the outer arc surface of the weight plate in an annular shape at equal intervals, and the rolling elements are rollingly connected to the inner side wall of the training frame.

9. The pedal rehabilitation device for elderly people according to claim 8, characterized in that: A support frame is foldably arranged at the front and rear middle parts of the training frame, and the support frame includes a support plate rotatably connected to the side wall of the training frame and a pair of telescopic rods sleeved on the lower end of the support plate; a sleeve with the same axial direction as the training frame is welded to the lower end of the support plate, the telescopic rod is inserted and slidably connected with one end of the sleeve, and the side walls at both ends of the sleeve are threadedly connected with clamping bolts that penetrate into the interior thereof.

10. The pedal rehabilitation device for elderly people according to claim 9, characterized in that: The left and right side walls of the support plate are penetrated with a plurality of through slots, and the counterweight bars are adapted to be plugged into the through slots; a positioning frame is tightly fitted inside the training frame, and the positioning frame is a concentric ring frame structure, and a bearing is sleeved on its inner ring, and the middle part of the rotating shaft is tightly sleeved with the bearing.

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