Body training turning training device for gymnastics and use method

Abstract

The invention relates to the technical field of gymnastics training props, in particular to a gymnastics body training turning training device and a using method.The gymnastics body training turning training device is characterized in that a rotating disc is rotationally installed in a fixed base, the upper end of each supporting leg is fixedly provided with the same supporting frame, and a limiting frame is slidably installed in each supporting frame; and two auxiliary handrails are fixedly mounted at the lower end part of the limiting frame. According to the improved body training turning training device for gymnastics and the use method, the use height is adjusted by sliding a protective ring along a first supporting column, a second supporting column and a limiting rod, fixing is conducted in cooperation with an upper extrusion plate, and an upper driving motor is matched to drive a threaded ring to rotate so as to push a connecting piece and an auxiliary handrail to conduct use height adjustment; the use height of the device and the height of the protection structure can be freely adjusted according to the needs of a user when the device is used, so that the use effect of the device is improved, the device can be conveniently and rapidly used by different people, and the use efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of gymnastic training props, in particular to a gymnastic body training and rotation training device and a use method thereof. Background Art

[0002] The turning movement is extremely critical in gymnastics. It requires athletes to use their waist to rotate their bodies, and it places high demands on the waist muscle strength, flexibility, and body balance control ability of athletes. For gymnasts, solid turning training is an important foundation for mastering difficult movements. Beginners need to first go through basic turning training to strengthen waist muscles and improve flexibility before they can gradually challenge more complex turning movements and reduce the risk of injury during training.

[0003] At present, in the existing gymnastics body training, most of the basic turning exercises are carried out by rotating on the ground to train the waist of the trainee, or using a horizontal bar to train the upper limb strength of the trainee. The equipment used in this exercise method is mostly not adjustable, which is particularly awkward when facing trainees of different heights, resulting in a significant reduction in the training effect and affecting subsequent gymnastics exercises. In addition, most of them lack protective components during exercise, which can easily cause injuries to the trainees, thereby reducing the efficiency of exercise. Summary of the invention

[0004] The purpose of the present invention is to provide a gymnastic body training rotation training device and a method of use, so as to solve the problems raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gymnastic body training rotation training device and a method of use, comprising: a rotating disk is rotatably installed inside the fixed base, a protective ring is slidably installed on the upper end of the fixed base, four supporting legs are slidably installed on the upper end of the fixed base, the upper end of each supporting leg is fixedly installed with the same supporting frame, a limiting frame is slidably installed inside the supporting frame, and two auxiliary handrails are fixedly installed on the lower end of the limiting frame.

[0005] Further preferably, two first support columns are fixedly installed diagonally above the fixed base, and two second support columns are fixedly installed at another two diagonally above the fixed base. A limiting rod is fixedly installed inside each of the second support columns and the first support column, and a connecting base plate is fixedly installed on the upper end of each of the second support columns and the first support column.

[0006] Further preferably, a lock buckle is fixedly installed inside the fixed base, a sliding switch is slidably installed on the upper end of the lock buckle, a connecting disc is rotatably installed inside the fixed base, and a rotating disc is rotatably installed on the upper end of the connecting disc.

[0007] Further preferably, a limiting frame is fixedly installed on the outer surface of the rotating disk, connecting plates are fixedly installed on the four corners of the lower end of the rotating disk, a rotating column is rotatably installed on the lower end of each connecting plate, and a rolling wheel is sleeved on the outer surface of each rotating column. The rotating disk is rotatably installed inside the fixed base through the connecting plate, the rotating column, the rolling wheel and the connecting disc.

[0008] Further preferably, two mounting frames are fixedly installed on the outer surface of the protective ring, a first ring is fixedly installed on the side end of each mounting frame, and a second ring is fixedly installed on the side end of each mounting frame away from the first ring, and the protective ring is slidably installed above the fixed base through the first ring, the second ring, the limit rod, the first support column, and the second support column.

[0009] Further preferably, an extrusion plate is slidably mounted on the side end of each second sleeve ring, a first threaded rotating rod is rotatably mounted on the side end of each extrusion plate, and a fixed handle is fixedly mounted on the side end of each first threaded rotating rod.

[0010] Further preferably, a first rotating gear is rotatably mounted on the upper end of the support frame, a threaded ring is fixedly mounted inside the first rotating gear, a second rotating gear is meshed on the outer surface of the first rotating gear, and a driving motor is mounted on the upper end of the second rotating gear.

[0011] Further preferably, a second threaded rotating rod is fixedly installed inside the limit frame, and the second threaded rotating rod is slidably installed inside the threaded ring. A connecting piece is rotatably installed at the lower end of the limit frame, and auxiliary handrails are fixedly installed on both sides of the left and right sides of the connecting piece.

[0012] A gymnastic body training rotation training device and a method for using the gymnastic body training rotation training device, the specific implementation methods are as follows:

[0013] Step 1: Adjust the position of the protective ring along the limit rod to the waist position according to your own height, and then turn the fixed handle. The fixed handle drives the first threaded rotating rod to rotate and then cooperates with the thread groove on the side end of the second ring, and then pushes the extrusion plate close to the side of the first support column for extrusion and fixation. Then the user steps over the protective ring and stands above the rotating disk to start using the device.

[0014] Step 2: The user starts the drive motor, which drives the second rotating gear to rotate and then drives the meshing first rotating gear to rotate, thereby driving the threaded ring to rotate. The threaded ring rotates in coordination with the support frame limit to drive the second threaded rotating rod and the limit frame part to move downward, and then adjust the lower connecting part and the auxiliary armrest part to a suitable height for the user to use.

[0015] Step 3: The user stands on the rotating disk and pushes the sliding switch outward. When the sliding switch is pushed, the extension rod inside the lock will be retracted and withdrawn from the slot inside the limit frame. At this time, the rotating disk will rotate inside the fixed base with the cooperation of the connecting plate, rotating column, rolling wheel and connecting disk.

[0016] Step 4: Users can practice turning on the rotating disk according to their own conditions. When they are just starting out, they can use the auxiliary armrests and connectors on the top for assistance. Users hold the auxiliary armrests with both hands or one hand, and rotate themselves in conjunction with the bottom rotating disk. The auxiliary armrests will also rotate with the user, making it convenient for beginners to practice. If the user loses their hands or falls during use, they will be protected by a protective ring placed at the waist. The first support column and the second support column have soft-packed outer surfaces at the inwardly extending positions to reduce damage caused by impact.

[0017] Step 5: When the user has finished use, the user pushes the sliding switch outward again. At this time, the extension rod in the lock will rebound. At this time, turn the rotating disk under the foot. As the rotating disk rotates, the extension rod will naturally be pushed into the internal groove of the limit frame for buckle fixation. Then start the drive motor to lift and retract the limit frame, auxiliary armrests and other parts for easy storage and next use.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, the height of use is adjusted by sliding the protective ring along the first support column, the second support column, and the limit rod, which is fixed with the extrusion plate, and then the driving motor drives the threaded ring to rotate and then pushes the connecting piece and the auxiliary armrest to adjust the height of use. When the device is in use, the height of the device and the height of the protective structure can be freely adjusted according to the needs of the user, thereby improving the use effect of the device, facilitating the rapid use of the device by different groups of people, and improving the use efficiency of the device.

[0020] In the present invention, the protective ring installed inside the device and the inner sides of the first support column and the second support column are soft-packed, so that the damage caused to the user when falling can be reduced to a certain extent when the device is in use, thereby improving the safety of the device.

[0021] In the present invention, the support frame and other parts are inserted into the connecting base plate along the support legs, so that the device is installed above the fixed base, so that the device can be freely disassembled or assembled according to the needs of use when in use, thereby improving the efficiency of separate use and separate maintenance of the device and improving the maintenance efficiency of the device.

[0022] In the present invention, the extension rod inside the lock is controlled by a sliding switch to rebound or extend, thereby cooperating with a limit frame installed on the outer surface of the rotating disk to limit or use the rotating disk part, so that the device can be locked when the user performs up and down operations, reducing the risks during up and down operations and further improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the fixed base structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the rotating disk of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the protection ring of the present invention;

[0027] Figure 5 This is a schematic diagram of the support structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the limiting frame of the present invention.

[0029] In the figure: 1. fixed base; 11. first support column; 12. second support column; 13. limit rod; 14. connecting bottom plate; 15. lock; 16. sliding switch; 17. connecting disc; 2. rotating disc; 21. limit frame; 22. connecting plate; 23. rotating column; 24. rolling wheel; 3. mounting frame; 31. protective ring; 32. first ring; 33. second ring; 34. extrusion plate; 35. first threaded rotating rod; 36. fixed handle; 4. support frame; 41. support leg; 42. first rotating gear; 43. threaded ring; 44. second rotating gear; 45. driving motor; 5. limit frame; 51. second threaded rotating rod; 52. connecting piece; 53. auxiliary handrail. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6The present invention provides a technical solution: a gymnastic body training rotation training device and a method of use, comprising: a rotating disk 2 is rotatably installed inside a fixed base 1, a protective ring 31 is slidably installed on the upper end of the fixed base 1, four supporting legs 41 are slidably installed on the upper end of the fixed base 1, the upper end of each supporting leg 41 is fixedly installed with the same supporting frame 4, a limiting frame 5 is slidably installed inside the supporting frame 4, and two auxiliary handrails 53 are fixedly installed on the lower end of the limiting frame 5.

[0032] In this embodiment, Figure 1 and Figure 2 As shown, two first support columns 11 are fixedly installed diagonally above the fixed base 1, and two second support columns 12 are fixedly installed at the other two diagonally above the fixed base 1. A limiting rod 13 is fixedly installed inside each of the second support columns 12 and the first support columns 11, and a connecting base plate 14 is fixedly installed on the upper end of each of the second support columns 12 and the first support columns 11. This structure can facilitate the rapid installation of subsequent limiting rods 13 and connecting base plates 14 through the first support columns 11 and the second support columns 12 installed above the fixed base 1, and is convenient for the connection and use of subsequent structures.

[0033] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a lock buckle 15 is fixedly installed inside the fixed base 1, a sliding switch 16 is slidably installed on the upper end of the lock buckle 15, a connecting disk 17 is rotatably installed inside the fixed base 1, and a rotating disk 2 is rotatably installed on the upper end of the connecting disk 17. This structure can adjust the internal extension rod of the lock buckle 15 for telescopic adjustment by sliding the sliding switch 16 above the sliding lock buckle 15, which is convenient for subsequent blocking or use.

[0034] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a limit frame 21 is fixedly installed on the outer surface of the rotating disk 2, and connecting plates 22 are fixedly installed at the four corners of the lower end of the rotating disk 2. A rotating column 23 is rotatably installed at the lower end of each connecting plate 22, and a rolling wheel 24 is sleeved on the outer surface of each rotating column 23. The rotating disk 2 is rotatably installed inside the fixed base 1 through the connecting plate 22, the rotating column 23, the rolling wheel 24 and the connecting disk 17. This structure can be buckled with the outer surface of the connecting disk 17 through the connecting plate 22, the rotating column 23, the rolling wheel 24 installed below the rotating disk 2, so as to facilitate the rotating disk 2 to be rotated inside the fixed base 1 for use.

[0035] In this embodiment, Figure 1 and Figure 2 and Figure 4As shown, two mounting frames 3 are fixedly installed on the outer surface of the protective ring 31, and a first ring 32 is fixedly installed on the side end of each mounting frame 3, and a second ring 33 is fixedly installed on the side end of each mounting frame 3 away from the first ring 32. The protective ring 31 is slidably installed above the fixed base 1 through the first ring 32, the second ring 33, the limiting rod 13, the first support column 11, and the second support column 12. This structure can be installed on the outer surface of the protective ring 31 through the mounting frame 3, the first ring 32, the second ring 33, the first support column 11, the second support column 12, and the limiting rod 13, so as to facilitate the adjustment of the height of the protective ring 31.

[0036] In this embodiment, Figure 1 and Figure 4 As shown, an extrusion plate 34 is slidably installed on the side end of each second ring 33, and a first threaded rotating rod 35 is rotatably installed on the side end of each extrusion plate 34. A fixed handle 36 is fixedly installed on the side end of each first threaded rotating rod 35. This structure can drive the first threaded rotating rod 35 to rotate and cooperate with the threaded hole on the side end of the second ring 33 by rotating the fixed handle 36, thereby driving the extrusion plate 34 to slide, thereby facilitating the limiting fixation of the protective ring 31.

[0037] In this embodiment, Figure 1 and Figure 5 As shown, a first rotating gear 42 is rotatably installed at the upper end of the support frame 4, a threaded ring 43 is fixedly installed inside the first rotating gear 42, a second rotating gear 44 is meshed on the outer surface of the first rotating gear 42, and a driving motor 45 is installed at the upper end of the second rotating gear 44. This structure can be started by the driving motor 45 to drive the second rotating gear 44 to rotate and then drive the first rotating gear 42 to rotate.

[0038] In this embodiment, Figure 1 and Figure 6 As shown, a second threaded rotating rod 51 is fixedly installed inside the limit frame 5, and the second threaded rotating rod 51 is slidably installed inside the threaded ring 43. A connecting piece 52 is rotatably installed at the lower end of the limit frame 5, and auxiliary handrails 53 are fixedly installed on the left and right sides of the connecting piece 52. This structure can facilitate the auxiliary coordination with the first rotating gear 42 and the threaded ring 43 through the second threaded rotating rod 51 installed inside the limit frame 5, thereby adjusting the use height of the connecting piece 52 and the auxiliary handrail 53.

[0039] A gymnastic body training rotation training device and a method for using the gymnastic body training rotation training device, the specific implementation methods are as follows:

[0040] Step 1: Adjust the position of the protective ring 31 along the limiting rod 13 to the waist position according to your own height, and then rotate the fixed handle 36. The fixed handle 36 drives the first threaded rotating rod 35 to rotate and then cooperates with the side thread groove of the second ring 33, and then pushes the extrusion plate 34 close to the side of the first support column 11 for extrusion and fixation. Then the user steps over the protective ring 31 and stands above the rotating disk 2 to start using the device.

[0041] Step 2: The user starts the drive motor 45, the drive motor 45 drives the second rotating gear 44 to rotate and then drives the meshing first rotating gear 42 to rotate, thereby driving the threaded ring 43 to rotate, the threaded ring 43 rotates to cooperate with the support frame 4 to limit, thereby driving the second threaded rotating rod 51 and the limiting frame 5 to move downward, and then adjust the lower connecting piece 52 and the auxiliary armrest 53 to a suitable height for the user to use.

[0042] Step 3: The user stands on the rotating disk 2 and pushes the sliding switch 16 outward. When the sliding switch 16 is pushed, the extension rod inside the lock 15 will be retracted and withdrawn from the internal slot of the limit frame 21. At this time, the rotating disk 2 will rotate inside the fixed base 1 with the cooperation of the connecting plate 22, the rotating column 23, the rolling wheel 24 and the connecting disk 17.

[0043] Step 4: The user can practice turning on the rotating disk 2 according to his or her own conditions. When learning for the first time, the user can use the upper auxiliary armrest 53 and the connecting piece 52 for assistance. The user holds the auxiliary armrest 53 with both hands or one hand, and rotates by himself or herself in coordination with the bottom rotating disk 2. Since the hand-held auxiliary armrest 53 also rotates with the user, it is convenient for beginners to practice. When the user loses his or her grip or falls during use, the protective ring 31 placed at the waist position protects the user, and the first support column 11 and the second support column 12 are partially extended inwardly with soft-packed outer surfaces to reduce damage caused by collision.

[0044] Step 5: When the user has finished use, the user pushes the sliding switch 16 outward again, and the extension rod in the lock 15 will rebound. At this time, the rotating disk 2 under the foot is turned. As the rotating disk 2 rotates, the extension rod will naturally be pushed into the internal groove of the limit frame 21 for buckle fixation, and then the drive motor 45 is started to lift and retract the limit frame 5, auxiliary armrest 53 and other parts again for easy storage and next use.

[0045] The use method and advantages of the present invention: The gymnastic body training rotation training device and the use method, when in use, the working process is as follows:

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 4, Figure 5 and Figure 6 As shown, when using, the user first places the device on a horizontal surface, adjusts the protection ring 31 to the waist position according to the user's height, and then rotates the fixed handles 36 on both sides. The fixed handles 36 drive the first threaded rotating rod 35 to rotate and then drive the extrusion plate 34 to slide. After sliding, the extrusion plate 34 will be close to the outer surface of the first support column 11 for clamping and fixing. Then the user walks into the device and stands above the rotating disk 2, and then starts the driving motor 45. The driving motor 45 drives the second rotating gear 44 to rotate and then drives the first rotating gear 42 to rotate, so as to cooperate with the threaded ring 43 and the outer surface thread of the second threaded rotating rod 51 to limit the support frame 4, thereby pushing the limit frame 5 to move downward, and the connecting piece 5 below the limit frame 5 is moved downward. 2. After the auxiliary armrest 53 is adjusted to a suitable height for use, the user pushes the sliding switch 16 outward, and the sliding switch 16 will drive the extension rod inside the lock 15 to be retracted. At this time, the extension rod is separated from the internal groove of the limit frame 21, and the rotating disk 2 can rotate with the cooperation of the connecting plate 22, the rotating column 23, the rolling wheel 24 and the connecting disc 17. The user can hold the auxiliary armrest 53 according to the use needs to perform the turning exercises in gymnastics. When the user accidentally falls during the exercise, the user will first come into contact with the protective ring 31. The protective ring 31 is made of a soft material to reduce the damage to the user when falling, and the outer surfaces of the first support column 11 and the second support column 12 are soft-packed to further reduce the damage during training.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gymnastic body training rotation training device and a method of use, comprising: A rotating disk (2) is rotatably mounted inside the fixed base (1), a protective ring (31) is slidably mounted on the upper end of the fixed base (1), four supporting legs (41) are slidably mounted on the upper end of the fixed base (1), the upper end of each supporting leg (41) is fixedly mounted with the same supporting frame (4), a limiting frame (5) is slidably mounted inside the supporting frame (4), and two auxiliary handrails (53) are fixedly mounted on the lower end of the limiting frame (5).

2. A gymnastic body training rotation training device and a method of use according to claim 1, characterized in that: Two first support columns (11) are fixedly installed diagonally above the fixed base (1), and two second support columns (12) are fixedly installed at two other diagonally above the fixed base (1). A limiting rod (13) is fixedly installed inside each of the second support columns (12) and the first support column (11), and a connecting base plate (14) is fixedly installed at the upper end of each of the second support columns (12) and the first support column (11).

3. A gymnastic body training rotation training device and use method according to claim 1, characterized in that: A lock buckle (15) is fixedly mounted inside the fixed base (1), a sliding switch (16) is slidably mounted on the upper end of the lock buckle (15), a connecting disc (17) is rotatably mounted inside the fixed base (1), and a rotating disc (2) is rotatably mounted on the upper end of the connecting disc (17).

4. A gymnastic body training rotation training device and use method according to claim 3, characterized in that: A limit frame (21) is fixedly mounted on the outer surface of the rotating disk (2); connecting plates (22) are fixedly mounted at the four corners of the lower end of the rotating disk (2); a rotating column (23) is rotatably mounted on the lower end of each connecting plate (22); a rolling wheel (24) is sleeved on the outer surface of each rotating column (23); the rotating disk (2) is rotatably mounted inside the fixed base (1) through the connecting plates (22), the rotating columns (23), the rolling wheels (24) and the connecting disk (17).

5. A gymnastic body training rotation training device and use method according to claim 2, characterized in that: Two mounting frames (3) are fixedly mounted on the outer surface of the protective ring (31); a first ring (32) is fixedly mounted on the side end of each mounting frame (3); a second ring (33) is fixedly mounted on the side end of each mounting frame (3) away from the first ring (32); the protective ring (31) is slidably mounted above the fixed base (1) through the cooperation of the first ring (32), the second ring (33), the limiting rod (13), the first support column (11), and the second support column (12).

6. A gymnastic body training rotation training device and use method according to claim 5, characterized in that: A pressing plate (34) is slidably mounted on the side end of each second sleeve ring (33), a first threaded rotating rod (35) is rotatably mounted on the side end of each pressing plate (34), and a fixed handle (36) is fixedly mounted on the side end of each first threaded rotating rod (35).

7. A gymnastic body training rotation training device and use method according to claim 1, characterized in that: A first rotating gear (42) is rotatably mounted on the upper end of the support frame (4), a threaded ring (43) is fixedly mounted inside the first rotating gear (42), a second rotating gear (44) is meshed on the outer surface of the first rotating gear (42), and a driving motor (45) is mounted on the upper end of the second rotating gear (44).

8. A gymnastic body training rotation training device and use method according to claim 7, characterized in that: A second threaded rotating rod (51) is fixedly installed inside the limiting frame (5), and the second threaded rotating rod (51) is slidably installed inside the threaded ring (43). A connecting piece (52) is rotatably installed at the lower end of the limiting frame (5), and auxiliary handrails (53) are fixedly installed on both left and right sides of the connecting piece (52).

9. A gymnastic body training rotation training device and a method for using the gymnastic body training rotation training device according to claims 1-8, characterized in that: The specific implementation is as follows: Step 1: Use the protective ring (31) to adjust the position along the limiting rod (13) to the waist position according to your own height, then rotate the fixed handle (36), the fixed handle (36) drives the first threaded rotating rod (35) to rotate and then cooperate with the thread groove on the side end of the second ring (33), and then pushes the extrusion plate (34) close to the side of the first support column (11) for extrusion and fixation, and then the user steps over the protective ring (31) and stands above the rotating disk (2) to start using the device. Step 2: The user starts the driving motor (45), the driving motor (45) drives the second rotating gear (44) to rotate, and then drives the meshing first rotating gear (42) to rotate, thereby driving the threaded ring (43) to rotate, and the threaded ring (43) rotates to cooperate with the support frame (4) to limit, thereby driving the second threaded rotating rod (51) and the limiting frame (5) to move downward, and then the lower connecting piece (52) and the auxiliary handrail (53) are adjusted to a suitable height for the user to use. Step 3: The user stands on the rotating disk (2) and pushes the sliding switch (16) outward. The sliding switch (16) is pushed and the extension rod inside the lock (15) is retracted and withdrawn from the internal slot of the limit frame (21). At this time, the rotating disk (2) will rotate inside the fixed base (1) under the cooperation of the connecting plate (22), the rotating column (23), the rolling wheel (24) and the connecting disk (17). Step 4: The user can practice turning on the rotating disk (2) according to his / her own conditions. When a beginner is learning, he / she can use the upper auxiliary handrail (53) and the connecting piece (52) for assistance. The user holds the auxiliary handrail (53) with both hands or one hand, and rotates by himself / herself in coordination with the bottom rotating disk (2). Since the hand-held auxiliary handrail (53) also rotates with the user, it is convenient for beginners to practice. When the user loses his / her grip or falls during use, he / she will be protected by the protective ring (31) placed at the waist position, and the first support column (11) and the second support column (12) are partially extended inwardly with soft packing on the outer surface to reduce the damage caused by collision. Step 5: When the user has finished using the device, the user pushes the sliding switch (16) outwards again, and the extension rod in the lock (15) will rebound. At this time, the user turns the rotating disk (2) under the foot, and as the rotating disk (2) rotates, the extension rod will naturally be pushed into the inner groove of the limit frame (21) for buckling and fixing. Then, the drive motor (45) is started to lift and retract the limit frame (5), the auxiliary armrest (53) and other parts again, so as to facilitate storage and next use.

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