Floating and swimming training device, floating and swimming training device for demonstration in water and body builder

Abstract

The invention discloses a floating and swimming training device for land training, a floating and swimming training device for underwater demonstration and a body builder, and belongs to the technical field of physical training equipments.The floating and swimming training device comprises a deck chair, a left pedal water-kicking training mechanism, a right pedal water-kicking training mechanism, a left hand water-pushing training mechanism and a right hand water-pushing training mechanism; flowing of floating swimming is achieved through the deck chair, floating swimming foot kicking training is achieved through the left foot kicking training mechanism and the right foot kicking training mechanism, water pushing training of floating swimming hands is achieved through the left hand water pushing training mechanism and the right hand water pushing training mechanism, and floating swimming training is well achieved. The floating and swimming training device for demonstration in water realizes a zero-buoyancy state of the training device through the buoyancy piece, and the air inlet and exhaust of the air cylinder are led to the water surface through the breather pipe, so that the use of the floating and swimming training device for demonstration in water by a trainee is realized; after the throttle valve A and the throttle valve B of the floating and swimming training device are closed, the device becomes a body builder, and strength training of legs, feet and arms is achieved.

Description

Technical Field

[0001] This invention belongs to the field of sports training equipment technology, specifically relating to a floating swimming training device for land training, a floating swimming training device for water demonstration, and a fitness device. Background Technology

[0002] Floating swimming involves the body floating on its back on the water's surface, propelled by kicking or pushing with the hands. Existing land-based swimming training equipment is generally for strength and endurance training in breaststroke, backstroke, or freestyle, but there is no equipment specifically for floating swimming. Furthermore, the swimming resistance of existing land-based swimming training equipment is mainly applied through rubber ropes or weights, which is not very convenient to adjust. Rubber ropes need to be replaced to achieve the desired effect, and the increase or decrease of weights is limited by the number and grade of weights. Moreover, the resistance of rubber ropes is directly proportional to their stretching length, while the resistance of weights is constant. Since the actual resistance of paddling and kicking is related to the speed of movement, the faster the speed, the greater the resistance, applying resistance through rubber ropes or weights cannot effectively simulate training. Summary of the Invention

[0003] To better facilitate swimming training, this invention provides a swimming training device.

[0004] The present invention provides a swimming training device, comprising a reclining chair, a left foot kicking water training mechanism, a right foot kicking water training mechanism, a left hand pushing water training mechanism, and a right hand pushing water training mechanism. The recliner is for trainees to lie flat. The left foot kicking water training mechanism is installed at the front left position of the recliner and includes a guide rail, a pneumatic resistance simulator, a connecting plate, support rollers, and a foot support frame. There are two pneumatic resistance simulators, each including a cylinder A, a one-way valve A, a throttle valve A, and a three-way connector A. The three ports of the three-way connector A are respectively connected to the front air port of cylinder A, the exhaust port of one-way valve A, and the throttle valve A. The two cylinders A of the two pneumatic resistance simulators are installed parallel to each other on the same horizontal plane. The connecting plate is installed on the piston rod head of the two cylinders A. The foot support frame is used for foot support and fixation and is installed on the connecting plate. The support rollers are installed on the lower part of the connecting plate. The guide rail is located between the two pneumatic resistance simulators, and the support rollers support the guide rail and roll along the guide rail. The right foot kicking water training mechanism is installed at the front right position of the recliner and is structurally the same as the left foot kicking water training mechanism. The left-hand water-pushing training mechanism is installed at the left front of the recliner and includes a cylinder B, a one-way valve B, a throttle valve B, a three-way connector B, and a palm support sleeve. The three ports of the three-way connector B are respectively connected to the tail end air port of the cylinder B, the exhaust port of the one-way valve B, and the throttle valve B. The palm support sleeve is installed on the piston rod head of the cylinder. The right-hand water-pushing training mechanism is installed at the front right of the recliner and is structurally the same as the left-hand water-pushing training mechanism.

[0005] Furthermore, the connecting plate has lugs A on both sides, and the upper part of the foot support frame is rotatably mounted on the lugs A via a pivot A. During training, when the foot pushes forward against the foot support frame, the foot can rotate downward with the foot support frame; when the foot retracts and pulls the foot support frame backward, the foot can rotate upward with the foot support frame. Even further, the foot support frame has a stop block on top. When the foot support frame rotates downward to a vertical position, the stop block can block the foot support frame from continuing to rotate on the connecting plate. In this way, when the foot pushes forward, the foot surface remains vertical, resulting in a larger kicking area and better kicking effect during swimming.

[0006] Furthermore, the piston rod head of the cylinder B is equipped with a rotating shaft B perpendicular to the piston rod, and the outer side of the palm support sleeve is provided with a lug B. The palm support sleeve is mounted on the rotating shaft B through the lug B, thereby realizing the flipping motion of the palm during the water-pushing movement. Further still, a baffle is provided at the lower end of the palm support sleeve. When the palm support sleeve rotates downward to a vertical position, the baffle can block the piston rod of the cylinder B, restricting the palm support sleeve from continuing to rotate. During palm push water training, the palm drives the palm support sleeve to rotate downward to the vertical limit state, thus maintaining a vertical state when pushing water. At this time, the palm strikes the water, which can improve the stroke effect during swimming. Further still, when the palm support sleeve rotates upward to a horizontal position, the palm support sleeve is blocked by the piston rod of the cylinder B, restricting the palm support sleeve from continuing to rotate. During training, the palm retracts, and the palm drives the palm support sleeve to flip upward to the horizontal limit state. At this time, the side of the palm strikes the water, which can reduce the resistance during the palm retraction during swimming.

[0007] The present invention discloses the working principle of a floatation training device. A throttle valve is used to adjust the exhaust speed of the cylinder. A larger throttle valve opening results in a faster exhaust speed and less resistance to the cylinder; conversely, a smaller throttle valve opening results in a slower exhaust speed and greater resistance to the piston rod pushing the cylinder. Adjusting the throttle valve opening achieves resistance adjustment. During floatation training, the trainee lies flat on a recliner, with their left foot supported and fixed to the foot support frame of the left foot kicking training mechanism, and their right foot supported and fixed to the foot support frame of the right foot kicking training mechanism. The weight of the feet is transmitted to the support rollers through a connecting plate. The left hand is placed on the left hand pushing training mechanism. Inside the hand support sleeve, the right hand is placed inside the hand support sleeve of the right-hand water-pushing training mechanism. Then, leg kicking and hand pushing water training are performed. The left and right feet can kick alternately or simultaneously, and the left and right hands can also push alternately or simultaneously. When kicking, the pushing force of the foot acts on the piston rod head of cylinder A through the foot support frame, pushing the piston rod out. The support rollers roll on the guide rail to continue supporting the weight of the foot. During the extension of the piston rod, air enters through the tail port of cylinder A, and exhausts through the front port of cylinder A through throttle valve A. The throttling action of throttle valve A creates exhaust resistance. The faster the piston rod is pushed, the more air is compressed inside cylinder A. The larger the pressure, the greater the resistance acting on the piston rod. This corresponds to the increased resistance as the kicking speed increases during swimming. After the kick, the leg retracts, and the pulling force is transmitted through the foot support frame to the piston rod head of the cylinder, pulling the piston rod back. The support roller continues to support the weight of the foot as it rolls on the guide rail. During the piston retraction process, air enters through both the one-way valve A and the throttle valve A at the front of cylinder A, and exhausts through the air port at the rear of cylinder A. Because the air port at the rear is open, the resistance to pulling cylinder A is relatively small, achieving better leg kicking training. When pushing with the palm, the pushing force of the palm acts on the piston rod head of cylinder B through the palm support sleeve, pushing the piston rod towards the larger... As the legs retract, the air at the tail end of the cylinder exhausts through the throttle valve B. The throttling effect of the throttle valve B generates exhaust resistance. The faster the piston rod is pushed, the greater the air compression in cylinder B, the greater the air pressure, and the greater the resistance acting on the piston rod. This corresponds to the greater resistance that occurs when pushing water at a higher speed in swimming. After pushing the palm, the arm retracts, and the palm pulls the piston rod forward towards the chest. At this time, both the one-way valve B and the throttle valve B are inlet, and the air at the front end of cylinder B exhausts. Since the front end is open, the resistance of the palm pulling cylinder B is very small. This corresponds to the small resistance in the arm retraction movement in swimming, achieving better palm pushing water training.

[0008] This invention also discloses a floating swimming training device for underwater demonstration, used for underwater demonstration of the floating swimming training device. It includes the above-mentioned floating swimming training device, and also includes a buoyancy plate, a venting tube, and a buckle. The buoyancy plate is installed on the recliner and the guide rail to achieve a zero buoyancy state for the floating swimming training device in the water, and the distance between the center of buoyancy and the center of mass is less than 50mm. One end of the venting tube extends out of the water surface, and the other end is connected to the tail end air port of cylinder A, the front end air port of cylinder B, throttle valve A, throttle valve B, the air inlet of one-way valve A, and the air inlet of one-way valve B through a branch, so that the air intake and exhaust of cylinder A and cylinder B are all gathered in the venting tube. The buckle is used to fix the trainee's body on the recliner.

[0009] The present invention discloses a water-based demonstration floatation training device used as follows: In safe water, throttle valves A and A2 are opened to their maximum. The trainee lies flat on a recliner with the support and assistance of an assistant. The left foot is supported and fixed to the foot support frame of the left foot kicking training mechanism, and the right foot is supported and fixed to the foot support frame of the right foot kicking training mechanism. The left hand is placed in the hand support sleeve of the left hand pushing training mechanism, and the right hand is placed in the hand support sleeve of the right hand pushing training mechanism. The body is secured to the recliner with straps. The assistant releases the hands, and the trainee demonstrates floatation by kicking the water with the feet and pushing the water with the hands, just like with a land-based floatation training device. The kicking and pushing frequency is maintained between 20 and 30 times per minute. The assistant ensures safety during the floatation process. After the floatation is completed, the trainee is lifted and assisted by the assistant to remove the training device, and the demonstration ends.

[0010] The present invention also discloses a fitness device, which is structurally the same as the swimming training device of the present invention, but with the technical feature that throttle valve A and throttle valve B are in the closed state. The fitness machine works as follows: During leg strength training, the foot pedal pushes the piston rod of cylinder A through the foot support frame. Because the one-way valve A at the front port of cylinder A can only allow air in but not exhaust, and because the throttle valve A is also closed, the front of cylinder A cannot exhaust air. The longer the foot pedal pushes the piston rod of cylinder A to extend, the greater the air pressure inside cylinder A, thus performing leg strength training. When retracting the leg, the compressed air accumulated in cylinder A pushes the piston rod and the leg to retract. During arm strength training, the palm pushes the piston rod of cylinder B to retract through the palm support sleeve. Because the one-way valve B at the rear port of cylinder B can only allow air in but not exhaust, and because the throttle valve B is also closed, the rear of cylinder B cannot exhaust air. The longer the palm pushes the piston rod of cylinder B to retract, the greater the compressed air pressure inside cylinder B, thus performing hand strength training. When retracting the hand, the compressed air accumulated in cylinder B pushes the piston rod and the arm to retract.

[0011] This invention discloses a floatation training device, comprising a reclining chair, a left-leg kicking training mechanism, a right-leg kicking training mechanism, a left-hand pushing training mechanism, and a right-hand pushing training mechanism. The reclining chair enables a flat, floatation-like posture; the left and right leg kicking mechanisms train the leg kicking motion; and the left and right hand pushing mechanisms train the hand pushing motion. The training mechanisms simulate the resistance of the kicking and pushing motions by controlling the cylinder exhaust resistance through throttle valves and one-way valves. The faster the piston rod of the cylinder moves, the greater the resistance, thus effectively achieving floatation training. This invention also includes a floatation training device for underwater demonstration. A buoyancy plate enables the device to achieve zero buoyancy, and an air vent pipe directs the cylinder's air intake and exhaust to the water surface, allowing the user to demonstrate the device's use in water. When throttle valves A and B are closed, the floatation training device becomes a fitness device, enabling strength training for the legs and arms. Attached Figure Description

[0012] Figure 1 This is a structural diagram of an embodiment of a swimming training device and fitness device of the present invention.

[0013] Figure 2 yes Figure 1 Top view.

[0014] Figure 3 yes Figure 1 The left view.

[0015] Figure 4 yes Figure 1 The right view.

[0016] Figure 5 yes Figure 1 Structural diagram of a reclining chair.

[0017] Figure 6 yes Figure 5 Top view.

[0018] Figure 7 yes Figure 5 The left view.

[0019] Figure 8 yes Figure 1 A structural diagram of the left-foot kicking water training mechanism.

[0020] Figure 9 yes Figure 8 Top view.

[0021] Figure 10 yes Figure 8 The left view.

[0022] Figure 11 yes Figure 8 Structural diagram of the connecting plate.

[0023] Figure 12 yes Figure 11 The left view.

[0024] Figure 13 yes Figure 11 Top view.

[0025] Figure 14 yes Figure 8 A diagram showing the state of the trainee pulling the piston rod of cylinder A back when retracting their leg.

[0026] Figure 15 yes Figure 1 A structural diagram showing the left-hand water-pushing training mechanism and the left lifting and rotating machine installed together.

[0027] Figure 16 yes Figure 15 Structural diagram of the middle palm support sleeve.

[0028] Figure 17 yes Figure 15 A diagram showing the state of the trainee pulling the piston rod of cylinder B when retracting their hand.

[0029] Figure 18 These are diagrams showing the left-hand and right-hand water-pushing training mechanisms after rotation.

[0030] Figure 19 This is a structural diagram of an embodiment of a water-based demonstration swimming training device according to the present invention.

[0031] Attached reference numerals: 1. Recliner; 2. Left leg kicking water training mechanism, left hand pushing water training mechanism; 4. Right leg kicking water training mechanism; 5. Right hand pushing water training mechanism; 6. Left lifting and rotating mechanism (purchased); 7. Right lifting and rotating mechanism (purchased); 8. Buoyancy plate; 9. Buckle; 10. Air pipe; 11. Recliner frame; 12. Recliner board; 21. Guide rail; 22. Cylinder A; 23. Connecting plate; 24. Support roller; 25. Foot support frame; 26. Straps; 27. One-way valve A; 28. T-connector A; 29. ​​Throttling device A; 30. Cylinder mounting base; 32. Rotating shaft A; 33. Stop block; 34. Outrigger; 35. Support lug A; 41. Cylinder B; 42. Throttling valve B; 43. T-connector B; 44. One-way valve B; 45. Bearing seat; 46. Hand support sleeve; 47. Rotating shaft B; 48. Damping rotating seat; 49. Lifting rod; 50. Mounting sleeve; 52. Support lug B; 53. Baffle. Implementation

[0032] Figures 1 to 18 The present invention illustrates a swimming training device, which includes a reclining chair 1, a left leg kicking training mechanism 2, a right leg kicking training mechanism 4, a left hand pushing training mechanism 3, and a right hand pushing training mechanism 5.

[0033] The recliner 1 is for the trainee to lie flat and includes a recliner frame 11 and a recliner board 12 mounted on the recliner frame.

[0034] The left-foot water-kicking training mechanism 2 is installed at the front left position of the recliner 1, and includes a guide rail 21, a pneumatic resistance simulator, a connecting plate 23, support rollers 24, and a foot support frame 25. There are two pneumatic resistance simulators, each including a cylinder A22, a one-way valve A27, a throttle valve A29, and a three-way connector A28. The three ports of the three-way connector A28 are respectively connected to the front air port of the cylinder A22, the exhaust port of the one-way valve A27, and the throttle valve A29. The two cylinders A22 of the two pneumatic resistance simulators are installed parallel to each other on the same horizontal plane. The connecting plate 2... 3. The piston rod heads of the two cylinders A are installed. The connecting plate 23 is provided with lugs A35 on both sides. The upper part of the foot support frame 25 is rotatably mounted on the lugs A35 through the rotating shaft A32. The connecting plate 23 is provided with a stop block 33. When the foot support frame 25 rotates downward to the vertical position, the stop block 33 can block the foot support frame 25 and limit its continued rotation. The foot support frame 25 is provided with a foot-fixing strap 26. The support roller 24 is installed on the lower part of the connecting plate 23. The guide rail 21 is located between the two pneumatic resistance simulators. The support roller 25 is supported on the guide rail 21 and rolls along the guide rail.

[0035] The guide rail 21 is made of square alloy profile, and the support roller 24 is set in a groove shape. The groove-shaped support roller rolls across the aluminum alloy profile.

[0036] The tail end of cylinder A22 is mounted on the recliner plate 12 via cylinder mounting seat 30, the front end of guide rail 21 is mounted on the ground via support leg 34, and the rear end of guide rail 21 is mounted on recliner frame 11.

[0037] Figure 14 This diagram shows the state when the trainee pulls the piston rod of cylinder A21 back when retracting their leg. At this time, the foot support frame 25 rotates upward under the pull of the foot, and the sole of the foot rotates to a relatively straight angle. The relatively straight retraction action of the sole of the foot during swimming can reduce resistance, and better training results can be achieved through this action.

[0038] The right leg kick training mechanism 4 is installed at the front right position of the recliner 1, and its structure is the same as that of the left leg kick training mechanism 1.

[0039] The left-hand water-pushing training mechanism 2 includes a cylinder B41, a one-way valve B44, a throttle valve B42, a three-way connector B43, and a palm support sleeve 46. The three ports of the three-way connector B43 are respectively connected to the tail end air port of the cylinder B41, the exhaust port of the one-way valve B44, and the throttle valve B42.

[0040] A bearing seat 45 is mounted on the piston rod head of cylinder B41, and a rotating shaft B47 perpendicular to the piston rod is mounted on the bearing seat 45. A lug 52 is provided on the outer side of the palm support sleeve 46, and the palm support sleeve 46 is mounted on the rotating shaft 47 via the lug 52. A baffle 53 is provided at the lower end of the palm support sleeve 46. When the palm support sleeve 46 rotates downwards to a vertical position, the baffle 53 blocks the piston rod of cylinder B41, restricting the palm support sleeve 46 from further rotation. This allows the palm to rotate downwards to its limit, keeping the palm surface vertical, thus improving the stroke effect during swimming. When the palm support sleeve 46 rotates upwards to a horizontal position, the piston rod of cylinder B41 blocks the palm support sleeve from further rotation. Figure 17 This is a diagram showing the trainee's palm flipping upwards to the limit and retracting the cylinder B41. At this time, the side of the palm strikes the water, which can reduce the resistance when the palm retracts during swimming.

[0041] The structure of the right-hand water-pushing training mechanism 5 is the same as that of the left-hand water-pushing training mechanism 2.

[0042] The swimming training device in this embodiment also includes a left lifting and rotating mechanism 6 and a right lifting and rotating mechanism 7. The left lifting and rotating mechanism 6 includes a damping rotating seat 48, a lifting rod 49, and a mounting sleeve 50. The mounting sleeve 50 is installed on the left front of the reclining chair 12. The lifting rod 49 can be lifted and lowered and installed in the mounting sleeve 50. The damping rotating seat 48 can rotate left and right and is installed on the top of the lifting rod 49. The front end of the cylinder B41 of the left hand pushing water training mechanism 3 is installed on the damping rotating seat 48. The left lifting and rotating mechanism 6 enables the left hand pushing water training mechanism 3 to be lifted and rotated and installed on the left front of the reclining chair 12. The lifting and lowering adjustment of the lifting rod 49 adjusts the left hand pushing water training mechanism 3 to a suitable training height. The left and right rotation of the damping rotating seat 48 adjusts the direction of the left palm pushing water. The preferred direction of the left palm pushing water training is from the left chest to the outside of the left leg.

[0043] The right lifting and rotating mechanism 7 has the same structure as the left lifting and rotating mechanism 6. The mounting sleeve 50 of the right lifting and rotating mechanism 7 is installed on the right front of the recliner 12. The front end of the cylinder B41 of the right hand water pushing training mechanism 5 is installed on the damping rotating seat 48. The right lifting and rotating mechanism 6 enables the right hand water pushing training mechanism 5 to be lifted, rotated and installed on the right front of the recliner 12. The lifting and lowering adjustment of the lifting rod 49 adjusts the right hand water pushing training mechanism 5 to a suitable training height. The left and right rotation of the damping rotating seat 48 adjusts the direction of the right palm water pushing. The preferred direction of the right palm water pushing training is from the right chest to the outside of the right leg.

[0044] Figure 18The diagram shows the state of the left-hand water-pushing training mechanism 3 and the right-hand water-pushing training mechanism 5 after rotation. At this time, the direction of the left-hand water-pushing training is from the left chest to the outside of the left leg, and the direction of the right-hand water-pushing training is from the right chest to the outside of the right leg.

[0045] Figure 19 This invention illustrates an embodiment of a floating swimming training device for underwater demonstration. The device includes the floating swimming training device described in the above embodiment, and further includes a buoyancy plate 8, a ventilator 10, and a strap 9. The buoyancy plate 8 is mounted on the recliner frame 11 and the guide rail 21, achieving a zero-buoyancy state for the floating swimming training device in the water, with the distance between the center of buoyancy and the center of mass less than 50mm. One end of the ventilator 10 extends out of the water surface, and the other end is connected via a branch to the tail port of cylinder A22, the front port of cylinder B41, throttle valve A29, throttle valve B42, the inlet of one-way valve A27, and the inlet of one-way valve B44, so that the air intake and exhaust of cylinders A22 and B41 converge into the ventilator 10. The strap 9 is used to fix the trainee's body to the recliner 1.

[0046] The present invention also discloses a fitness device, which is structurally the same as the above-mentioned swimming training device, but with the technical feature that the throttle valve A29 and the throttle valve B42 are in the closed state.

Claims

1. A rafting training device, characterized in that: Includes a reclining chair, a left-leg kicking water training mechanism, a right-leg kicking water training mechanism, a left-hand pushing water training mechanism, and a right-hand pushing water training mechanism; The recliner is for trainees to lie flat. The left foot kicking water training mechanism is installed at the front left position of the recliner and includes a guide rail, a pneumatic resistance simulator, a connecting plate, support rollers, and a foot support frame. There are two pneumatic resistance simulators, each including a cylinder A, a one-way valve A, a throttle valve A, and a three-way connector A. The three ports of the three-way connector A are respectively connected to the front air port of cylinder A, the exhaust port of one-way valve A, and the throttle valve A. The two cylinders A of the two pneumatic resistance simulators are installed parallel to each other on the same horizontal plane. The connecting plate is installed on the piston rod head of the two cylinders A. The foot support frame is used for foot support and fixation and is installed on the connecting plate. The support rollers are installed on the lower part of the connecting plate. The guide rail is located between the two pneumatic resistance simulators, and the support rollers support the guide rail and roll along the guide rail. The right foot kicking water training mechanism is installed at the front right position of the recliner and is structurally the same as the left foot kicking water training mechanism. The left-hand water-pushing training mechanism is installed at the left front of the recliner and includes a cylinder B, a one-way valve B, a throttle valve B, a three-way connector B, and a palm support sleeve. The three ports of the three-way connector B are respectively connected to the tail end air port of the cylinder B, the exhaust port of the one-way valve B, and the throttle valve B. The palm support sleeve is installed on the piston rod head of the cylinder. The right-hand water-pushing training mechanism is installed at the front right of the recliner and is structurally the same as the left-hand water-pushing training mechanism.

2. The rafting training device according to claim 1, characterized in that: The connecting plate is provided with lugs A on both sides, and the upper part of the foot support frame is rotatably mounted on the lugs A via a pivot A; the foot support frame is provided with a stop block, and when the foot support frame rotates downward to a vertical position, the stop block can block the connecting plate to restrict the foot support frame from continuing to rotate.

3. The rafting training device according to claim 1 or 2, characterized in that: The piston rod head of cylinder B is equipped with a rotating shaft B perpendicular to the piston rod. The outer side of the palm support sleeve is provided with a lug B, and the palm support sleeve is mounted on the rotating shaft B through the lug B. A baffle is provided at the lower end of the palm support sleeve. When the palm support sleeve rotates downward to the vertical position, the baffle can block the piston rod of cylinder B to restrict the palm support sleeve from continuing to rotate. When the palm support sleeve rotates upward to the horizontal position, the palm support sleeve is blocked by the piston rod of cylinder B, restricting the palm support sleeve from continuing to rotate.

4. The rafting training device according to claim 1 or 2, characterized in that: The swimming training device also includes a left lifting and rotating mechanism and a right lifting and rotating mechanism. The left hand water pushing training mechanism can be lifted and rotated and installed in the front left of the recliner via the left lifting and rotating mechanism; the right hand water pushing training mechanism can be lifted and rotated and installed in the front right of the recliner via the right lifting and rotating mechanism.

5. The rafting training device according to claim 3, characterized in that: The swimming training device also includes a left lifting and rotating mechanism and a right lifting and rotating mechanism. The left hand water pushing training mechanism can be lifted and rotated and installed in the front left of the recliner via the left lifting and rotating mechanism; the right hand water pushing training mechanism can be lifted and rotated and installed in the front right of the recliner via the right lifting and rotating mechanism.

6. A water-based demonstration and training device for swimming, characterized in that: The swimming training device according to claim 1 further includes a buoyancy plate, a venting tube, and a strap. The buoyancy plate is installed on the recliner and the guide rail to achieve a zero-buoyancy state for the swimming training device in water demonstration, with the distance between the center of buoyancy and the center of mass being less than 50mm. One end of the venting tube extends out of the water surface, and the other end is connected via a branch to the tail port of cylinder A, the front port of cylinder B, throttle valve A, throttle valve B, the air inlet of one-way valve A, and the air inlet of one-way valve B, so that the air intake and exhaust of cylinder A and cylinder B are all concentrated in the venting tube. The strap is used to fix the trainee's body on the recliner.

7. A water-based demonstration and training device for swimming, characterized in that: The floating swimming training device according to claim 5 further includes a buoyancy plate, a venting tube, and a buckle. The buoyancy plate is installed on the recliner and the guide rail to achieve a zero buoyancy state for the floating swimming training device in water demonstration, and the distance between the center of buoyancy and the center of mass is less than 50mm. One end of the venting tube extends out of the water surface, and the other end is connected to the tail end air port of cylinder A, the front end air port of cylinder B, throttle valve A, throttle valve B, the air inlet of one-way valve A, and the air inlet of one-way valve B through a branch, so that the air intake and exhaust of cylinder A and cylinder B are all gathered in the venting tube. The buckle is used to fix the trainee's body on the recliner.

8. A fitness device, characterized in that: The structure of the fitness device is the same as that of the swimming training device according to claim 1, and the throttle valve A29 and the throttle valve B42 are in the closed state.

9. A fitness device, characterized in that: The structure of the fitness device is the same as that of the swimming training device according to claim 5, and the throttle valve A29 and the throttle valve B42 are in the closed state.

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