A swimming posture-assisted rehabilitation exercise trainer

Abstract

This invention discloses a swimming posture-assisted rehabilitation exercise trainer. An upper limb movement mechanism is connected to the left end of the central frame, and a lower limb movement mechanism is connected to the right end. The upper and lower limb movement mechanisms are connected and linked through a linkage mechanism on the central frame. An upper rocker arm and a lower rocker arm are connected to the left and right ends of the central frame, respectively. The rear end of an upper sliding rod is placed in the internal track of the upper rocker arm and can slide. A connecting groove is formed on the upper surface of the upper sliding rod and the upper rocker arm. The front and rear ends of the middle sliding rod are located on both sides of the central frame, and an upper connecting rod, a connecting rod push handle, and a lower connecting rod are coaxially connected to both the front and rear ends. The upper connecting rod is slidably and fixedly set in the groove. A backstroke pedal is slidably mounted on the lower rocker arm, and the lower connecting rod is connected and linked to the backstroke pedal through a rotating shaft. This invention has the technical characteristics of being able to use a multi-link mechanism to link upper and lower limb movements, allowing for autonomous or assisted backstroke and breaststroke limb movement training and rehabilitation.

Description

Technical Field

[0001] This invention relates to a sports training device, and more specifically, to a swimming posture-assisted rehabilitation sports training device, belonging to the field of medical rehabilitation training equipment. Background Technology

[0002] Swimming, as a full-body exercise that comprehensively engages the muscles of the upper limbs, neck, shoulders, back, abdomen, and lower limbs, can improve muscle quality and improve muscle strength, speed, endurance, and joint flexibility in healthy individuals. It effectively promotes blood circulation throughout the body and strengthens some deep muscles. Swimming also has a positive effect on preventing or alleviating arteriosclerosis and cardiovascular disease. For those in a sub-healthy state or with mild limb movement impairment, swimming is an excellent rehabilitation exercise. Lying down or supine positions reduce the load on joints due to body weight. The backward tilting of the neck during backstroke exercises the cervical facet joints, aiding in the recovery of cervical spondylosis patients. The breaststroke helps patients with lower back and leg pain or lumbar disc herniation. However, patients with knee osteoarthritis and bowlegs should avoid breaststroke training and can choose freestyle or backstroke instead.

[0003] Current technology and the market focus heavily on swimming training devices, primarily targeting fitness enthusiasts to improve muscle strength and technique. For example, the commercially available VASA Ergometer swimming resistance band uses a damper-controlled resistance rope for self-training, aiming to correct swimming posture and strengthen core muscles. Similarly, patents such as CN201810781221.5 ("A Leg Movement Simulation Device Based on Breaststroke Training") and CN201610970892.7 ("Swimming Training Equipment") also aim to improve muscle strength and correct movement in healthy individuals. Currently, commonly used sports therapy and rehabilitation equipment includes electric lifting standing beds, physical therapy stools, physical therapy beds, Barcusll balls, ladders, balance boards, various dumbbells and sandbags, gymnastic sticks and throwing balls, ankle trainers, rollers, balance bars, standing frames, shoulder ladders, wall bars, quadriceps trainers, wedge mats, wrist rehabilitation trainers, forearm rehabilitation trainers, shoulder rehabilitation trainers, posture correction mirrors, etc. Each piece of equipment is highly specialized, requiring significant investment and space. Currently, there are many musculoskeletal patients, and there are few technical solutions that combine swimming strokes with medical rehabilitation training to improve or rehabilitate limb movement abilities. The market also lacks specialized swimming stroke-assisted rehabilitation equipment or facilities for targeted auxiliary exercise and rehabilitation. Developing such equipment could fill a market gap and has high social and commercial value. Summary of the Invention

[0004] In order to solve the above-mentioned problems in the prior art, the present invention provides a swimming posture-assisted rehabilitation exercise trainer that has the technical characteristics of being able to use a multi-link mechanism to link the upper limb movement with the lower limb movement, and being able to perform backstroke and breaststroke limb movement training and rehabilitation independently or with assistance.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A swimming posture-assisted rehabilitation exercise trainer includes a base frame and a middle frame connected to the base frame. The upper end and left end of the middle frame are respectively connected to a middle component and a head support component. The left end of the middle frame can also be movably connected to an upper limb movement mechanism, which is located below the head support component. The right end of the middle frame can be movably connected to a lower limb movement mechanism. The upper limb movement mechanism and the lower limb movement mechanism are connected and linked through a linkage mechanism connected to the middle frame.

[0007] The upper limb movement mechanism includes two rocker arms and an upper slide rod, with a handle connected to the free end of the upper slide rod. The linkage mechanism includes a middle slide rod. The lower limb movement mechanism includes a lower rocker arm and a supine pedal. The middle component includes a chest plate, a roll cage, a waist and abdomen plate, and a detachable buttock plate.

[0008] The upper rocker arm and lower rocker arm are connected to the left and right ends of the middle frame by separate and longitudinal rotating shafts, and the upper rocker arm and the lower rocker arm can be assembled or separated. The rear end of the upper slide rod is placed in the internal track of the upper rocker arm and can slide. The upper end face of the upper slide rod and the upper rocker arm is provided with a connected groove. The front end and the rear end of the middle slide rod are respectively located on both sides of the middle frame. The front end and the rear end are coaxially connected with an upper connecting rod, a connecting rod push handle and a lower connecting rod. The two upper connecting rods are symmetrical and can be slidably and fixedly set in a groove by locking buttons. Each lower rocker arm is provided with a tilting pedal. The two lower connecting rods are symmetrical and are connected to a tilting pedal by rotating shafts.

[0009] Preferably, each of the two lower rocker arms is connected to an upward-facing, arc-shaped footrest. A slide rail is provided along the footrest, and a foot slide is slidably installed in the slide rail. A foot slide rod extending downward is connected to the pivot connecting the lower connecting rod and the foot pedal 13. A slide rod lock is connected to the foot slide, and the slide rod lock can be slidably fitted onto a foot slide rod to realize the linkage between the foot slide 15 and the lower connecting rod.

[0010] Preferably, the right end of the upper rocker arm is connected to an upper circular block and a lower circular block. The upper circular block and the lower circular block are spaced apart and each is sleeved on a rotating shaft. A half gear is provided on the rotating shaft between the upper circular block and the lower circular block. The two upper rocker arms can be linked together through the meshing half gear.

[0011] The left end of the lower rocker arm is connected to an upper end block and a lower end block. The upper end block and the lower end block are spaced apart and each is sleeved on a rotating shaft. A half gear is provided on the rotating shaft between the upper end block and the lower end block. The two lower rocker arms can be linked together through the meshing half gear.

[0012] Preferably, a wedge-shaped groove is provided on the outer side surface of the lower rocker arm 12, and a matching inverted block slide is provided corresponding to the groove. The inverted block slide is connected to the tilting pedal for linkage.

[0013] Preferably, the front and rear ends of the middle frame are provided with transverse sliding grooves, and the middle sliding rod is set on the sliding groove by a locking button, and the left and right positions of the sliding rod in the sliding groove of the middle frame are adjusted by the locking button.

[0014] Preferably, a piston rod is connected to the lower end of the upper sliding rod, a base is connected to the right end below the upper rocker arm, an adjustable damper is connected to the base, and the right end of the piston rod is connected to the adjustable damper.

[0015] Preferably, the head support assembly and the hip plate are respectively installed on the pivots at the front and rear ends of the middle frame, and the chest plate, anti-roll frame, and waist plate are installed in the corresponding first slide groove, second slide groove, and third slide groove on the middle frame and their positions are adjustable; the first slide groove and the third slide groove are transverse strip grooves, and the second slide groove is a longitudinal strip groove.

[0016] Preferably, a tension spring is fixed to the left end of the groove of the lower rocker arm, and the other end of the tension spring is fixed to the inverted block of the backrest pedal assembly to provide resistance for leg extension and automatic return of the backrest pedal.

[0017] Preferably, the left end of the lower rocker arm has a recessed groove, into which the butt plate can be installed; the right end of the lower rocker arm is connected to a floor rod with rollers.

[0018] The headrest assembly includes a headrest and a mounting tube. The mounting tube is connected to the left end of the central frame. The headrest is connected to a telescopic rod. The right end of the telescopic rod extends into the mounting tube. The mounting tube has a moving groove. An anti-detachment block is provided above the moving groove. The anti-detachment block is connected to the telescopic rod inside the mounting tube. The linear groove also has a locking screw. The locking screw can lock and fix the telescopic rod inside the mounting tube.

[0019] Preferably, two fixing plates are connected to the base frame, and the other ends of the two footrests are fixed to the fixing plates for support.

[0020] Beneficial effects: Compared with existing rehabilitation exercise training equipment, this invention uses a multi-link mechanism to realize the linkage of upper and lower limb movements, which can be used to match both backstroke and breaststroke swimming strokes. It can be used by the user alone or with the assistance of a helper, and can carry out rehabilitation exercises for multiple muscle groups and joints throughout the body. Compared with existing swimming training equipment, this invention is more suitable for sports rehabilitation and has a greater advantage in terms of experience for users with mild limitations in movement. This device has a simple structure, is easy to process, and is easy to mass-produce and market, and has good market value and social value. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall assembly relationship of the present invention.

[0022] Figure 2 This is an exploded view of the structure of the present invention.

[0023] Figure 3 This is a schematic diagram illustrating the application of the backstroke swimming posture matching method of the present invention.

[0024] Figure 4 This is a schematic diagram illustrating the application of the breaststroke swimming posture matching method of the present invention.

[0025] Figure 5 This is a schematic diagram of the backstroke swimming posture matching application of the present invention.

[0026] Figure 6 This is a schematic diagram of the component relationships in three states of use of the present invention.

[0027] Figure 7 This is a schematic diagram illustrating the application of the breaststroke swimming posture matching method of the present invention.

[0028] Figure 8 This is a schematic diagram of the component relationships in four states of use of the present invention.

[0029] Figure 9 This is a schematic diagram of the backstroke swimming posture matching application of the present invention.

[0030] Figure 10 This is a schematic diagram of the component relationships in the five states of use of the present invention.

[0031] Figure 11 This is a schematic diagram of the application of the breaststroke swimming posture matching method of the present invention.

[0032] Figure 12 This is a schematic diagram of the component relationships in six states of use according to the present invention.

[0033] Figure 13 This is a schematic diagram of the rocker arm movement of the present invention.

[0034] Figure 14This is a schematic diagram of the limiting adjustment grooves of the middle frame of the present invention.

[0035] Figure 15 This is a schematic diagram of the slider position adjustment in this invention.

[0036] Figure 16 This is a schematic diagram of the backstroke-specific structure of the present invention.

[0037] Figure 17 This is a schematic diagram of the structure for the breaststroke application of the present invention.

[0038] Figure 18 This is a schematic diagram of the headrest position adjustment according to the present invention.

[0039] Figure 19 This is a schematic diagram illustrating the adjustment methods of the midframe, chest plate, roll cage, and waist plate of the present invention.

[0040] Figure 20 This is the connection method between the back pedal assembly and the lower rocker arm of the present invention.

[0041] Figure 21 This is a schematic diagram illustrating the assistive rehabilitation exercises of the present invention.

[0042] Figure 22 This is a schematic diagram illustrating the backstroke swimming posture of the present invention. Detailed Implementation

[0043] The following will refer to the appendices in the embodiments of the present invention. Figure 1-22 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0045] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an indirect connection through an intermediate medium, but the connections at various points do not affect the multi-position folding of this application. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] The ingenuity of this invention lies in the use of a linkage mechanism to link and coordinate the movements of the upper and lower limbs. It can be used in combination with backstroke and breaststroke strokes, or the components can be disassembled through a quick-release structure for use in a single stroke. The dedicated grip area makes it convenient for assistive users to train, and the position of the human body matching components can be flexibly adjusted to suit different body types, filling a gap in the market for similar products.

[0047] The principle of this invention: The movements of the upper sliding rod 6 and the lower rocker arm 12 are transmitted through the upper connecting rod 8 and the lower connecting rod 11, and constrained by the middle sliding rod 3. The transmission of the leg movements in the breaststroke is realized through the sliding connection of the foot pedal sliding rod 16.

[0048] The present invention provides a swimming posture assisted rehabilitation exercise training device, including a base frame 1 and a middle frame 2 connected to the base frame 1. The upper end and the left end of the middle frame 2 are respectively connected to a middle component and a head support component 18. The left end of the middle frame 2 can also be movably connected to an upper limb movement mechanism, which is located below the head support component 18. The right end of the middle frame 2 can be movably connected to a lower limb movement mechanism. The upper limb movement mechanism and the lower limb movement mechanism are connected and linked by a linkage mechanism connected to the middle frame 2.

[0049] The upper limb movement mechanism includes two rocker arms 5 and an upper slide rod 6. The free end of the upper slide rod 6 is connected to a handle 6.1. The linkage mechanism includes a middle slide rod 3. The lower limb movement mechanism includes a lower rocker arm 12 and a supine pedal 13. The middle component includes a chest plate 19, a roll cage 20, a waist and abdomen plate 21, and a detachable buttock plate 22.

[0050] The upper rocker arm 5 and the lower rocker arm 12 are respectively connected to the left and right ends of the middle frame 2 via separate and longitudinal rotating shafts 2.5. The upper rocker arms 5 and the lower rocker arms 12 can be assembled or separated. The rear end of the upper slide rod 6 is placed in the internal track of the upper rocker arm 5 and can slide. The upper end face of the upper slide rod 6 and the upper rocker arm 5 is provided with a connected groove. The front end and the rear end of the middle slide rod 3 are respectively located on both sides of the middle frame 2. The front end and the rear end are coaxially connected with an upper connecting rod 8, a connecting rod push handle 10, and a lower connecting rod 11. The two upper connecting rods 8 are symmetrical and are slidably and fixedly set in a groove via locking knobs 9. Each lower rocker arm 12 is slidably provided with a tilting pedal 13. The two lower connecting rods 11 are symmetrical and are connected to a tilting pedal 13 via rotating shafts.

[0051] Each of the two lower rocker arms 12 is connected to an upward-facing, arc-shaped footrest 14.1. A slide rail is provided along the footrest 14.1, and a foot slide 15 is slidably installed in the slide rail. A foot slide rod 16 extending downward is connected to the pivot connecting the lower connecting rod 11 and the footrest 13. A slide rod lock 17 is connected to the foot slide 15. The slide rod lock 17 can be slidably fitted onto a foot slide rod 16 to realize the linkage between the foot slide 15 and the lower connecting rod 11.

[0052] In a preferred embodiment, the right end of the upper rocker arm 5 is connected to an upper circular block and a lower circular block. The upper and lower circular blocks are spaced apart and each is sleeved on a rotating shaft 2.5. The rotating shaft 2.5 between the upper and lower circular blocks is provided with a half gear 4 (which can be a fixed or non-fixed connection). The two upper rocker arms 5 can be linked together through the meshing half gear 4.

[0053] The left end of the lower rocker arm 12 is connected to an upper end block and a lower end block. The upper end block and the lower end block are spaced apart and each is sleeved on a rotating shaft 2.5. A half gear 4 is provided on the rotating shaft 2.5 between the upper end block and the lower end block. The two lower rocker arms 12 can be linked together through the meshing half gear 4.

[0054] In a preferred embodiment, a wedge-shaped groove 12.1 is provided on the outer side of the lower rocker arm 12, and a matching inverted block slide 13.1 is provided corresponding to the groove 12.1. The inverted block slide 13.1 is connected to the tilting pedal 13 for linkage.

[0055] In a preferred embodiment, the front and rear ends of the middle frame 2 are provided with transverse sliding grooves 2.4, and the middle sliding rod 3 is set on the transverse sliding groove 2.4 by a locking button 3.1. The left and right positions of the sliding rod 3 within the transverse sliding groove 2.4 of the middle frame 2 are adjusted by the locking button 3.1.

[0056] In a preferred embodiment, the lower end of the upper sliding rod 6 is connected to a piston rod 7.2, the right end of the upper rocker arm 5 is connected to a base 7.1, an adjustable damper is connected to the base 7.1, and the right end of the piston rod 7.2 is connected to the adjustable damper.

[0057] In a preferred embodiment, the head support assembly 18 and the hip plate 22 are respectively mounted on the pivot shafts 2.5 at the front and rear ends of the middle frame 2. The chest plate 19, the roll cage 20, and the waist and abdomen plate 21 are mounted in the corresponding first slide groove 2.1, second slide groove 2.2, and third slide groove 2.3 on the middle frame 2 and their positions are adjustable. The first slide groove 2.1 and the third slide groove 2.3 are transverse strip grooves, and the second slide groove 2.2 is a longitudinal strip groove.

[0058] In a preferred embodiment, a tension spring is fixed to the left end of the slide groove 12.1 of the lower rocker arm 12, and the other end of the tension spring is fixed to the inverted block slide 13.1 of the backrest pedal assembly 13 to provide resistance for leg extension and automatic return of the backrest pedal 13.

[0059] In a preferred embodiment, the left end of the lower rocker arm 12 is recessed with a groove, into which the butt plate 22 can be installed; the right end of the lower rocker arm 12 is connected to a floor rod with rollers.

[0060] The headrest assembly 18 includes a headrest and a mounting tube. The mounting tube is connected to the left end of the middle frame 2. The headrest is connected to a telescopic rod. The right end of the telescopic rod extends into the mounting tube. The mounting tube has a moving groove. An anti-detachment block 18.1 is provided above the moving groove. The anti-detachment block 18.1 is connected to the telescopic rod inside the mounting tube. The linear groove also has a locking screw, which can lock the telescopic rod in place inside the mounting tube.

[0061] In a preferred embodiment, two fixing plates 14 are connected to the base frame 1, and the other ends of the two footrests 14.1 are fixed to the fixing plates 14 for support.

[0062] Working principle: The user operates the handle 6.1 to drive the upper slide rod 6 to slide back and forth in the upper rocker arm 5. Adjust the locking knob 9 (which can be a screw) to lock it in the appropriate position. When the upper slide rod 6 and the upper rocker arm 5 rotate left and right (i.e., the upper rocker arm 5 separates and joins), the lower connecting rod 11 is connected through the upper connecting rod 8. This, along with the left and right sliding of the tilting pedal 13 on the lower rocker arm 12, the swaying motion of the treadmill 15 on the tilting frame 14.1, and the left and right opening and closing motion of the lower rocker arm 12, interacts and leverages each other.

[0063] like Figure 1 , 3Figures -12, 15, and 22 illustrate one embodiment of the swimming stroke rehabilitation trainer, which supports both backstroke and breaststroke modes. Switching between strokes simply requires removing or attaching the hip board 22. Depending on cost or specific needs, unnecessary stroke components can be removed, such as... Figure 16 The swimming stroke rehabilitation trainer only supports backstroke, such as... Figure 17 As shown, the swimming stroke rehabilitation trainer only supports the breaststroke stroke.

[0064] like Figure 21 As shown in one embodiment, the device provides three different auxiliary exercise operation positions, namely a handle 6.1, a linkage push handle 10, and a ground support leg with casters on a lower rocker arm 12.

[0065] Operation method 1: Left and right linkage.

[0066] like Figure 1 , 3 As shown in Figures 8 and 22, the half gear 4 in this application can also be non-fixed and sleeved on the rotating shaft 2.5. However, in order to achieve the goal of fixing the half gear 4 on the rotating shaft 2.5, the following scheme can be set:

[0067] The inner ring of the half-gear assembly 4 has a lower convex tooth 4.1 on its lower side. Corresponding mounting positions on the upper rocker arm 5 and lower rocker arm 12 are grooves 5.1 and 12.3, respectively. Pins 5.2 and 12.2 are also located on the upper rocker arm 5 and lower rocker arm 12 near the half-gear assembly 4. When pins 5.2 and 12.2 are pulled out, the half-gear 4 falls freely, and the lower convex tooth 4.1 enters the grooves 5.1 and 12.3. At this time, the gears inside the half-gear 4 are engaged, thus synchronizing the movements of the upper rocker arm 5 and lower rocker arm 12 with the movements of the half-gear 4 installed within them. In this mode of use, the movements of both the upper and lower limbs can be fully linked.

[0068] If the half gear 4 is fixedly mounted on the rotating shaft 2.5, the movement of the upper rocker arm 5 and the lower rocker arm 12 will be permanently synchronized with the movement of the half gear 4 installed inside them.

[0069] Operation method two: Independent left and right sides.

[0070] When the half gear 4 in this application can also be non-fixedly mounted on the rotating shaft 2.5, such as... Figure 9-14As shown in Figure 22, when the single-sided pins 5.2 and 12.2 are pressed in, the half gear 4 is lifted (specifically, this could be due to the pins being inserted between the half gear 4 and the upper circular block, or between the half gear 4 and the upper end block). The lower convex tooth 4.1 separates from the grooves 5.1 and 12.3, and the transmission between the half gears 4 is lost. This prevents the movement of the upper rocker arm 5 and the lower rocker arm 12 from being transmitted through the half gears 4 installed within them. In this mode of use, the movements of the upper and lower limbs can achieve single-sided linkage between the left and right sides.

[0071] Operation method three: loose linkage.

[0072] like Figure 13-15 As shown, when the locking button 3.1 and the locking slide button 9 are in the unlocked state, the upper connecting rod 8 and the lower connecting rod 11 will transmit the action only when the locking slide button 9 is limited and pressed by the two ends of the inner groove of the upper sliding rod 6. The independent movement of the exerciser's limbs has a certain degree of freedom and autonomy.

[0073] Operation Method 4: Single Swimming Style.

[0074] like Figure 16 As shown, without the foot pedal frame 14.1, foot slide 15, foot pedal connecting rod 16, and slide rod lock 17 installed, the device only functions for backstroke. Figure 17 As shown, without the back pedal 13 and hip board 22 installed, the device only has the function of breaststroke swimming.

[0075] Finally, it should be noted that the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A swimming posture-assisted rehabilitation exercise training device, comprising a base frame (1) and a middle frame (2) connected to the base frame (1), characterized in that: The upper end and left end of the middle frame (2) are respectively connected to the middle component and the head support component (18). The left end of the middle frame (2) is also movably connected to the upper limb movement mechanism, which is located below the head support component (18). The right end of the middle frame (2) is movably connected to the lower limb movement mechanism. The upper limb movement mechanism and the lower limb movement mechanism are connected and linked through a linkage mechanism connected to the middle frame (2). The upper limb movement mechanism includes two upper rocker arms (5) and two upper slide rods (6). The free end of the upper slide rod (6) is connected to a handle (6.1). The linkage mechanism includes a middle slide rod (3). The lower limb movement mechanism includes a lower rocker arm (12) and a back pedal (13). The middle component includes a chest plate (19), a roll cage (20), a waist and abdomen plate (21), and a detachable buttock plate (22). The upper rocker arm (5) and the lower rocker arm (12) are connected to the left and right ends of the middle frame (2) respectively by separate and longitudinal rotating shafts (2.5). The upper rocker arms (5) and the lower rocker arms (12) can be assembled or separated. The rear end of the upper slide rod (6) is placed in the internal track of the upper rocker arm (5) and can slide. The upper slide rod (6) and the upper rocker arm (5) have a connected groove. The front end and the rear end of the middle slide rod (3) are respectively located on both sides of the middle frame (2). The front end and the rear end are coaxially connected with the upper connecting rod (8), the connecting rod push handle (10), and the lower connecting rod (11). The two upper connecting rods (8) are symmetrical and can be slidably and fixedly set in a groove by locking knobs (9). Each lower rocker arm (12) is slidably provided with a tilting pedal (13). The two lower connecting rods (11) are symmetrical and are connected to a tilting pedal (13) by rotating shafts. Each of the two lower rocker arms (12) is connected to an upward-facing, arc-shaped footrest (14.1). A slide rail is provided along the footrest (14.1), and a slidable tread slide (15) is provided in the slide rail. A foot pedal sliding rod (16) extending downward is connected to the pivot shaft connecting the lower connecting rod (11) and the upper pedal (13). A sliding rod lock (17) is connected to the tread slide (15), and the sliding rod lock (17) can be slidably fitted onto a foot pedal sliding rod (16) to realize the linkage between the tread slide (15) and the lower connecting rod (11).

2. The swimming posture assistive rehabilitation exercise training device according to claim 1, characterized in that: The upper rocker arm (5) is connected to an upper circular block and a lower circular block at its right end. The upper circular block and the lower circular block are spaced apart and are both mounted on a rotating shaft (2.5). A half gear (4) is provided on the rotating shaft (2.5) between the upper circular block and the lower circular block. The two upper rocker arms (5) can be linked together through the meshing half gear (4). The lower rocker arm (12) is connected to an upper end block and a lower end block at its left end. The upper end block and the lower end block are spaced apart and are both mounted on a rotating shaft (2.5). A half gear (4) is provided on the rotating shaft (2.5) between the upper end block and the lower end block. The two lower rocker arms (12) can be linked together through the meshing half gear (4).

3. The swimming posture assistive rehabilitation exercise training device according to claim 1, characterized in that: The lower rocker arm (12) has a wedge-shaped groove (12.1) on its outer side surface, and a matching inverted block slide (13.1) is provided in the groove (12.1). The inverted block slide (13.1) is connected to the tilting pedal (13) for linkage.

4. The swimming posture assistive rehabilitation exercise training device according to claim 1, characterized in that: The front and rear ends of the middle frame (2) are provided with transverse sliding grooves (2.4). The middle sliding rod (3) is set on the transverse sliding groove (2.4) by a locking button (3.1). The left and right positions of the sliding rod (3) in the transverse sliding groove (2.4) of the middle frame (2) are adjusted by the locking button (3.1).

5. A swimming posture-assisted rehabilitation exercise training device according to claim 1 or 3, characterized in that: The lower end of the upper slide rod (6) is connected to a piston rod (7.2), and the right end of the upper rocker arm (5) is connected to a base (7.1). An adjustable damper is connected to the base (7.1), and the right end of the piston rod (7.2) is connected to the adjustable damper.

6. The swimming posture assistive rehabilitation exercise training device according to claim 1, characterized in that: The head support assembly (18) and the hip plate (22) are respectively installed on the pivot (2.5) at the front and rear ends of the middle frame (2). The chest plate (19), the roll cage (20), and the waist and abdomen plate (21) are installed in the corresponding first slide groove (2.1), second slide groove (2.2), and third slide groove (2.3) on the middle frame (2) and their positions are adjustable. The first slide groove (2.1) and the third slide groove (2.3) are transverse strip grooves, and the second slide groove (2.2) is a longitudinal strip groove.

7. The swimming posture assistive rehabilitation exercise training device according to claim 2, characterized in that: A tension spring is fixed at the left end of the groove (12.1) of the lower rocker arm (12), and the other end of the tension spring is fixed on the inverted block slide (13.1) of the backrest pedal (13) to provide resistance to leg extension and automatic return of the backrest pedal (13).

8. A swimming posture-assisted rehabilitation exercise training device according to claim 1 or 6, characterized in that: The lower rocker arm (12) has a recessed groove at its left end, and the butt plate (22) can be installed in the groove; the lower rocker arm (12) is connected to a ground rod with rollers at its right end. The headrest assembly (18) includes a headrest and a mounting tube. The mounting tube is connected to the left end of the middle frame (2). The headrest is connected to a telescopic rod. The right end of the telescopic rod extends into the mounting tube. The mounting tube has a moving groove. An anti-detachment block (18.1) is provided above the moving groove. The anti-detachment block (18.1) is connected to the telescopic rod inside the mounting tube. The moving groove is also provided with a locking screw (18.2). The locking screw (18.2) can lock the telescopic rod in place inside the mounting tube.

9. The swimming posture assistive rehabilitation exercise training device according to claim 1, characterized in that: Two fixing plates (14) are connected to the base frame (1), and the other ends of the two footrests (14.1) are fixed to the fixing plates (14) for support.

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