A leg fitness training device

Abstract

The present invention discloses a leg fitness training device, which includes a bracket main body. The bracket main body includes a bracket. The bracket is slidably connected with a leg press part through a rod arranged inside it. A weight member is fixedly connected to the end face of the leg press part. There are two weight members and they are symmetrically distributed with the leg press part as the center. An adjusting part, the adjusting part includes a containing box. The present invention relates to the technical field of training equipment. This leg fitness training device can effectively solve the problem in the prior art that for women in preliminary training, the barbell plates on the leg press and leg curl machine must be selected with appropriate weights, otherwise it is very easy to get injured during the training process. However, the weights of the barbell plates used in the existing leg press and leg curl machines are fixed (about 20KG for each), and the increase or decrease of a single dumbbell plate has a great impact on women in preliminary training, making it very difficult for women in preliminary training to choose a weight that is completely suitable for their own weight for training.

Description

Technical Field

[0001] The present invention relates to the technical field of training equipment, and particularly relates to a leg fitness training device. Background Art

[0002] The leg press and hack squat machine is one of the common fitness equipment, mainly used to exercise the quadriceps femoris of the thighs, which can thicken the muscles, enhance muscle strength, and shape muscle lines. It is a basic leg training tool for training the quadriceps femoris. When practicing, the body leans obliquely against the baffle, the waist must be closely attached to the baffle, the knees should always be in the same direction as the toes, and the heels are used to exert force during the pedaling process. Persisting in this for a long time is also helpful for improving the body's stability and coordination.

[0003] When using the leg press and hack squat machine for training, it is necessary to pay attention to proceeding step by step according to one's own situation and choosing an appropriate weight to start training. For women who are initially training, the weight of the barbell plates on the leg press and hack squat machine must be selected appropriately, otherwise it is very easy to get injured during the training process. However, the weight of the barbell plates used in the existing leg press and hack squat machines is fixed (about 20KG for each), and the increase or decrease of a single dumbbell plate has a great impact on women who are initially training, making it difficult for women who are initially training to choose a weight that is completely suitable for themselves for training. Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a leg fitness training device, which can effectively solve the problem in the prior art that for women who are initially training, the weight of the barbell plates on the leg press and hack squat machine must be selected appropriately, otherwise it is very easy to get injured during the training process. However, the weight of the barbell plates used in the existing leg press and hack squat machines is fixed (about 20KG for each), and the increase or decrease of a single dumbbell plate has a great impact on women who are initially training, making it difficult for women who are initially training to choose a weight that is completely suitable for themselves for training.

[0006] Technical Solution

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present invention provides a leg fitness training device, including:

[0009] A bracket main body, the bracket main body includes a bracket, the bracket is slidably connected with a hack squat part through a rod arranged inside it, the end face of the hack squat part is fixedly connected with a weight-bearing member, and there are two weight-bearing members symmetrically distributed with the hack squat part as the center;

[0010] Adjusting part, the adjusting part includes a containing box, the outer surface of the containing box is fixedly connected to the side surface of the bracket, the outer side of the containing box is fixedly communicated with a connecting pipe connected to the bottom of the load-bearing part, the inner wall of the containing box is fixedly connected with a piston plate, the top of the piston plate is fixedly connected with a lifting rod, the top end of the lifting rod penetrates through the containing box and extends to the outside, and a driving part for adjusting the height of the lifting rod is arranged on the top of the containing box;

[0011] Among them, the load-bearing part includes a straight cylinder, the outer circumferential surface of the straight cylinder is fixedly connected to the end surface of the leg press part, the bottom of the straight cylinder is fixedly communicated with the top end of the connecting pipe, the top of the straight cylinder is of an open design, a stabilizing plate is fixedly connected to the top of the straight cylinder, a piston disc is slidably connected to the inner wall of the straight cylinder, a scale rod fixedly connected to the top of the piston disc is slidably connected to the inside of the stabilizing plate, and a strong spring is sleeved on the outer circumferential surface of the scale rod, and the strong spring is located in the space surrounded by the stabilizing plate and the piston disc.

[0012] Furthermore, a retaining rod for limiting the leg press part is rotatably connected to the upper surface of the bracket, and a wrapping box is fixedly connected to the side of the bracket away from the retaining rod through a connecting plate, and the connecting pipe is located inside the wrapping box.

[0013] Furthermore, the driving part includes a driven rod, the containing box is rotatably connected to the outer end of the driven rod through a fixing seat arranged on its top, a small gear and a large gear are respectively fixedly connected to the outer circumferential surface of the driven rod, a tooth groove meshing with the outside of the small gear is formed on the outer circumferential surface of the lifting rod, a driving tooth is meshed with the outside of the large gear, a driving rod is fixedly connected to the end surface of the driving tooth, the end of the driving rod away from the driving tooth penetrates through the fixing seat and extends to the outside, and the containing box is rotatably connected to the outer circumferential surface of the driving rod through a fixing block arranged on its top.

[0014] Furthermore, an opening pipe slidably connected to the outer surface of the lifting rod is fixedly connected to the top of the containing box, and the diameters of the driving tooth, the small gear and the large gear increase in sequence.

[0015] Furthermore, a thin gear is sleeved on the outer circumferential surface of the driving rod, a toothed plate is slidably connected to the top of the containing box through a slide rail, the top of the toothed plate is meshed with the outside of the thin gear, and an L-shaped handle is fixedly connected to the end surface of the toothed plate.

[0016] Further, the reverse pedaling part includes a first sliding rod and a second sliding rod. The outer surface of the support rod is slidably connected to the inside of the first sliding rod and the second sliding rod respectively. The first sliding rod and the second sliding rod are symmetrically distributed between adjacent support rods. A first sliding hole is formed inside the first sliding rod, and a second sliding hole is formed inside the second sliding rod. A first clamping hole coaxial with the second sliding hole is formed inside the first sliding rod, and a second clamping hole coaxial with the first sliding hole is formed inside the second sliding rod. A first inner sliding rod that fits against the inner wall of the second clamping hole is slidably connected inside the first sliding hole, and a second inner sliding rod that fits against the inner wall of the first clamping hole is slidably connected inside the second sliding hole.

[0017] Further, positioning grooves are formed on the inner walls of the first sliding hole and the second sliding hole, and reverse pedaling plates are fixedly connected to the outside of the first sliding rod and the second sliding rod.

[0018] Beneficial effects

[0019] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0020] The present invention is provided with a weight-bearing member and an adjusting part. By replacing the traditional barbell plates with the weight-bearing member, the safety is higher, and the situation of barbell plates falling off is avoided. Secondly, the weight-bearing member can be adjusted to any weight within a certain range, and is no longer restricted by the weight of a single barbell plate (the weight of a single barbell plate is fixed, about 20KG each), and can only be increased or decreased by 20KG, which cannot meet the training needs. The adjustment method is to drive the piston plate to rise and fall through the driving member, introduce the fluid in the accommodating box into the weight-bearing member through the connecting pipe, thereby changing the total weight of the weight-bearing member, and observing the fluid depth through the scale on the scale rod. To sum up, the overall adjustment method of the adjusting part is simple to operate, the weight of the weight-bearing member can be increased or decreased at will, and when the straight cylinder is filled with fluid, since the air in the accommodating box and the connecting pipe is excluded in advance, when the fluid in the straight cylinder is balanced, there will be no gas filled in the straight cylinder. When the weight-bearing member and the reverse pedaling part move synchronously, the fluid inside the weight-bearing member will not shake. Description of the drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0023] Figure 2 It is a three-dimensional multi-angle structural schematic diagram of an embodiment of the present invention;

[0024] Figure 3 For the embodiment of the present invention Figure 2 is a schematic structural diagram of a partial enlargement at position A in the figure;

[0025] Figure 4 is a schematic structural diagram of a three-dimensional partial section of the adjusting part in the embodiment of the present invention;

[0026] Figure 5 For the embodiment of the present invention Figure 4 is a schematic structural diagram of a partial enlargement at position B in the figure;

[0027] Figure 6 is a schematic three-dimensional structural diagram of the leg press part in the embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of the transformation of the three-dimensional states of the first inner sliding rod and the second inner sliding rod in the embodiment of the present invention.

[0029] The reference numerals in the figure respectively represent: 1, bracket main body; 11, bracket; 12, support rod; 13, leg press part; 130, leg press plate; 131, first sliding rod; 132, second sliding rod; 133, first sliding hole; 134, second sliding hole; 135, first clamping hole; 136, second clamping hole; 137, first inner sliding rod; 138, second inner sliding rod; 139, positioning groove; 14, weight-bearing member; 141, straight cylinder; 142, stabilizing plate; 143, piston disc; 144, scale rod; 145, strong spring; 2, adjusting part; 21, accommodating box; 22, connecting pipe; 23, piston plate; 24, lifting rod; 241, tooth groove; 25, driving member; 251, driven rod; 252, small gear; 253, large gear; 254, driving tooth; 255, driving rod; 256, open pipe; 257, thin gear; 258, toothed plate; 3, shift lever; 4, wrapping box. Specific embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] The present invention will be further described below with reference to the embodiments.

[0032] Embodiment:

[0033] Please refer to Figures 1-7 , the present invention provides a technical solution: a leg fitness training device, including:

[0034] The bracket main body 1, the bracket main body 1 includes a bracket 11, the bracket 11 is slidably connected with a backrest part 13 through a support rod 12 arranged inside it, a weight-bearing member 14 is fixedly connected to the end face of the backrest part 13, and there are two weight-bearing members 14 which are symmetrically distributed with the backrest part 13 as the center;

[0035] The adjusting part 2, the adjusting part 2 includes a receiving box 21, the outer surface of the receiving box 21 is fixedly connected to the side surface of the bracket 11, a connecting pipe 22 communicated with the bottom of the weight-bearing member 14 is fixedly connected to the outside of the receiving box 21, a piston plate 23 is fixedly connected to the inner wall of the receiving box 21, a lifting rod 24 is fixedly connected to the top of the piston plate 23, the top end of the lifting rod 24 penetrates through the receiving box 21 and extends to the outside, and a driving member 25 for adjusting the height of the lifting rod 24 is arranged on the top of the receiving box 21;

[0036] Among them, the weight-bearing member 14 includes a straight cylinder 141, the outer circumferential surface of the straight cylinder 141 is fixedly connected to the end face of the backrest part 13, the bottom of the straight cylinder 141 is fixedly communicated with the top end of the connecting pipe 22, the top of the straight cylinder 141 is of an open design, a stabilizing plate 142 is fixedly connected to the top of the straight cylinder 141, a piston disc 143 is slidably connected to the inner wall of the straight cylinder 141, a scale rod 144 fixedly connected to the top of the piston disc 143 is slidably connected to the inside of the stabilizing plate 142, and a strong spring 145 is sleeved on the outer circumferential surface of the scale rod 144. The strong spring 145 is located in the space surrounded by the stabilizing plate 142 and the piston disc 143. The adjustment method is to adjust the lifting of the piston plate 23 through the driving member 25, introduce the fluid inside the receiving box 21 into the weight-bearing member 14 through the connecting pipe 22, thereby changing the total weight of the weight-bearing member 14, and observe the fluid depth through the scale on the scale rod 144. The overall adjustment method of the adjusting part 2 is simple to operate, the weight of the weight-bearing member 14 can be increased or decreased at will, and when the fluid fills the inside of the straight cylinder 141, since the air inside the receiving box 21 and the connecting pipe 22 is excluded in advance, when the fluid inside the straight cylinder 141 is balanced, there will be no gas filled inside the straight cylinder 141, and when the weight-bearing member 14 and the backrest part 13 move synchronously, the fluid inside the weight-bearing member 14 will not shake.

[0037] A retaining rod 3 for limiting the backrest part 13 is rotatably connected to the upper surface of the bracket 11, a wrapping box 4 is fixedly connected to the side of the bracket 11 away from the retaining rod 3 through a connecting plate, and the connecting pipe 22 is located inside the wrapping box 4 and can freely extend, facilitating the free movement of the backrest part 13.

[0038] The driving member 25 includes a driven rod 251. The accommodating box 21 is rotatably connected to the outer end of the driven rod 251 through a fixing seat provided on its top. Small gears 252 and large gears 253 are respectively fixedly connected to the circumferential outer surface of the driven rod 251. Tooth grooves 241 meshing with the outside of the small gears 252 are formed on the circumferential outer surface of the lifting rod 24. A driving tooth 254 is meshingly connected to the outside of the large gear 253. A driving rod 255 is fixedly connected to the end face of the driving tooth 254. One end of the driving rod 255 away from the driving tooth 254 penetrates through the fixing seat and extends to the outside. The accommodating box 21 is rotatably connected to the circumferential outer surface of the driving rod 255 through a fixing block provided on its top.

[0039] An opening tube 256 which is slidably connected to the outer surface of the lifting rod 24 is fixedly connected to the top of the accommodating box 21. The diameters of the driving tooth 254, the small gears 252 and the large gears 253 increase in sequence, improving the lifting precision of the lifting rod 24, providing a larger torque, facilitating the sliding of the piston plate 23, and being more labor-saving.

[0040] A thin gear 257 is sleeved on the circumferential outer surface of the driving rod 255. A toothed plate 258 is slidably connected to the top of the accommodating box 21 through a slide rail. The top of the toothed plate 258 is meshingly connected to the outside of the thin gear 257. An L-shaped handle is fixedly connected to the end face of the toothed plate 258. The toothed plate 258 which can be reset locks the thin gear 257 to prevent the driving rod 255 from rotating self, which may affect the weight of the load-bearing member 14.

[0041] The reverse pedaling part 13 includes a first sliding rod 131 and a second sliding rod 132. The outer surface of the support rod 12 is respectively slidably connected to the inside of the first sliding rod 131 and the second sliding rod 132. The first sliding rod 131 and the second sliding rod 132 are symmetrically distributed between adjacent support rods 12. A first sliding hole 133 is formed inside the first sliding rod 131. A second sliding hole 134 is formed inside the second sliding rod 132. A first clamping hole 135 coaxial with the second sliding hole 134 is formed inside the first sliding rod 131. A second clamping hole 136 coaxial with the first sliding hole 133 is formed inside the second sliding rod 132. A first inner sliding rod 137 which fits with the inner wall of the second clamping hole 136 is slidably connected inside the first sliding hole 133. A second inner sliding rod 138 which fits with the inner wall of the first clamping hole 135 is slidably connected inside the second sliding hole 134.

[0042] Positioning grooves 139 are provided on the inner walls of both the first sliding hole 133 and the second sliding hole 134. Anti-kick plates 130 are fixedly connected to the outer sides of the first sliding rod 131 and the second sliding rod 132. The anti-kick part 13 can be adjusted into two types: closed type and separated type. In the closed type, through the first inner sliding rod 137 and the second inner sliding rod 138, the first sliding rod 131 and the second sliding rod 132 are combined into a whole. The two anti-kick plates 130 are equivalent to a traditional single anti-kick plate as a whole. With the weight-bearing member 14 adjusted by the adjusting part 2, the trainer can use it normally. In the separated type, the first sliding rod 131 and the second sliding rod 132 are in a separated state and do not interfere with each other, and the two anti-kick plates 130 are separated. Since each anti-kick plate 130 is equipped with a weight-bearing member 14, when used by people with leg defects, the corresponding weight-bearing member 14 can be independently adjusted to the weight required by themselves. When the feet exert force to climb the corresponding anti-kick plate 130 for practical training, it can better protect the safety of the defective legs.

[0043] Reference Figures 1-7 , the leg press and anti-kick device is one of the common fitness equipment, mainly used to exercise the quadriceps femoris of the thighs. However, when using the leg press and anti-kick device for training, it is necessary to pay attention to proceeding step by step according to one's own situation and choose a suitable weight to start training. The weights of the barbell plates used for the counterweight of the leg press and anti-kick device are fixed (about 20KG for each). The increase or decrease of a single dumbbell plate has a great impact on women in the initial training, making it difficult for women in the initial training to choose a weight that is completely suitable for themselves for training. To overcome the above defects, the present invention designs a leg fitness training device.

[0044] Specifically, the adjustment method of the weight-bearing member 14 on the bracket main body 1 is mainly divided into preset adjustment and real-time adjustment:

[0045] Preset adjustment: Before the initial training, preliminary adjustment is carried out according to each person's physique. First, the accommodation box 21 and the connecting pipe 22 in the adjustment part 2 are filled with fluid (preferably water, filled through the feed valve on one side of the accommodation box 21), and the air inside the accommodation box 21 and the connecting pipe 22 is exhausted. At the same time, the piston disc 143 in the weight-bearing member 14 is in close contact with the bottom inner wall of the straight cylinder 141. Secondly, first pull the L-shaped handle to drive the toothed plate 258 away from the pinion 257, and then rotate the driving rod 255 in the driving member 25 counterclockwise through the manual rocker, drive the driving tooth 254 to rotate counterclockwise, drive the large gear 253, the driven rod 251 and the pinion 252 to rotate synchronously clockwise. The pinion 252 is meshed with the tooth groove 241 on the lifting rod 24. The pinion 252 drives the lifting rod 24 to slide downward along the inner wall of the opening pipe 256, drives the piston plate 23 to slide downward along the inner wall of the accommodation box 21. The piston plate 23 squeezes the fluid inside the accommodation box 21, and the fluid flows into the straight cylinder 141 through the connecting pipe 22. The fluid pushes the piston disc 143 to move upward along the inner wall of the straight cylinder 141, the strong spring 145 is compressed and elastically deformed, and the scale rod 144 slides upward along the inside of the stabilizing plate 142. According to the scale on the scale rod 144, determine the weight of the fluid filled in the straight cylinder 141 until the scale on the scale rod 144 reaches the preset mark, stop rotating the driving rod 255, and reset the toothed plate 258 to lock the pinion 257.

[0046] First, the present invention replaces the traditional barbell plates with the weight-bearing member 14, which has higher safety and avoids the situation of barbell plates falling off. Secondly, the weight-bearing member 14 can be adjusted to any weight within a certain range, and is no longer restricted by the weight of a single barbell plate (the weight of a single barbell plate is fixed at about 20KG), and can only be increased or decreased by 20KG, which cannot meet the training needs. The adjustment method is to adjust the lifting of the piston plate 23 through the driving member 25, introduce the fluid inside the accommodation box 21 into the weight-bearing member 14 through the connecting pipe 22, thereby changing the total weight of the weight-bearing member 14, and observe the fluid depth through the scale on the scale rod 144. In summary, the overall adjustment method of the adjustment part 2 is simple to operate, the weight of the weight-bearing member 14 can be increased or decreased at will, and when the fluid fills the inside of the straight cylinder 141, since the air inside the accommodation box 21 and the connecting pipe 22 is exhausted in advance, when the fluid inside the straight cylinder 141 is balanced, there will be no gas filled inside the straight cylinder 141. When the weight-bearing member 14 and the leg press part 13 move synchronously, the fluid inside the weight-bearing member 14 will not shake. At the same time, the reset toothed plate 258 locks the pinion 257 to avoid the situation that the driving rod 255 rotates automatically and affects the weight of the weight-bearing member 14.

[0047] Real-time adjustment: During the initial training, since the weight of the weight-bearing member 14 has been pre-adjusted, the user first keeps their back against the cushion all the time, rotates and lowers the gear lever 3, and then climbs the pedal board 130 on the reverse pedaling part 13 by exerting force with their feet for practical training. The preset adjustment of the weight of the weight-bearing member 14 may have a certain deviation for each person's training experience. For the trainer to use more comfortably, the trainer can make autonomous adjustments according to their own needs at this time. First, reset the gear lever 3 to limit the reverse pedaling part 13. Since the driving member 25 is located on both sides of the cushion, the user can first lean sideways and pull the L-shaped handle to drive the toothed plate 258 to disengage from the fine gear 257, and then slightly rotate the driving rod 255 to adjust the lifting of the piston plate 23, thereby controlling the weight of the weight-bearing member 14. Then, real-time training can be carried out, and adjustments can be made while training, which is very convenient. Until the weight of the weight-bearing member 14 fully meets the user's own needs, reset the toothed plate 258 to lock the fine gear 257.

[0048] Specifically, the pedal boards on existing leg press and reverse pedaling devices are all integral. For some people with congenital or acquired leg defects, there is a large difference in the thrust generated by the two legs. When training synchronously on the same pedal board, there is a safety risk for the defective leg (it cannot bear too much force), which is not conducive to the reasonable training of the defective leg. In this regard, the reverse pedaling part 13 can be adjusted into two types: closed type and separated type.

[0049] Closed type: Manually pull the first inner sliding rod 137 to slide along the inner wall of the first sliding hole 133. The first inner sliding rod 137 is inserted into the second clamping hole 136. Then, rotate the first inner sliding rod 137 downward to drive the handle outside the first inner sliding rod 137 to be inserted into the positioning groove 139 to prevent the first inner sliding rod 137 from loosening and disengaging from the second clamping hole 136. Manually pull the second inner sliding rod 138 to slide along the inner wall of the second sliding hole 134. The second inner sliding rod 138 is inserted into the first clamping hole 135. Then, rotate the second inner sliding rod 138 downward to drive the handle outside the second inner sliding rod 138 to be inserted into the positioning groove 139 to prevent the second inner sliding rod 138 from loosening and disengaging from the first clamping hole 135. Through the first inner sliding rod 137 and the second inner sliding rod 138, the first sliding rod 131 and the second sliding rod 132 are combined into a whole. The two pedal boards 130 are equivalent to a traditional integral pedal board. With the weight-bearing member 14 adjusted by the adjusting part 2, the trainer can use it normally.

[0050] In the separated state, the first inner sliding rod 137 is reset and damped and slidably hidden in the first sliding hole 133, and the second inner sliding rod 138 is reset and damped and slidably hidden in the second sliding hole 134. At this time, the first sliding rod 131 and the second sliding rod 132 are in a separated state and do not interfere with each other, and the two pedal boards 130 are separated. Since each pedal board 130 is equipped with a weight member 14, when used by people with leg defects, the corresponding weight member 14 can be adjusted to the weight required by itself. When the feet exert force to climb the corresponding pedal board 130 for practical training, it can better protect the safety of the defective leg and is beneficial to the reasonable training of the defective leg.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leg fitness training device, characterized in that, comprising: A bracket main body (1), the bracket main body (1) includes a bracket (11), the bracket (11) is slidably connected with a reverse pedaling part (13) through a support rod (12) arranged inside it, the end face of the reverse pedaling part (13) is fixedly connected with a weight member (14), and there are two weight members (14) symmetrically distributed with the reverse pedaling part (13) as the center; An adjusting part (2), the adjusting part (2) includes a housing box (21), the outer surface of the housing box (21) is fixedly connected with the side surface of the bracket (11), the outside of the housing box (21) is fixedly communicated with a connecting pipe (22) connected to the bottom of the weight member (14), the inner wall of the housing box (21) is fixedly connected with a piston plate (23), the top of the piston plate (23) is fixedly connected with a lifting rod (24), the top of the lifting rod (24) penetrates through the housing box (21) and extends to the outside, and a driving member (25) for adjusting the height of the lifting rod (24) is arranged on the top of the housing box (21); Wherein, the weight member (14) includes a straight cylinder (141), the outer circumferential surface of the straight cylinder (141) is fixedly connected with the end face of the reverse pedaling part (13), the bottom of the straight cylinder (141) is fixedly communicated with the top end of the connecting pipe (22), the top of the straight cylinder (141) is of an open design, the top of the straight cylinder (141) is fixedly connected with a stabilizing plate (142), a piston disc (143) is slidably connected to the inner wall of the straight cylinder (141), the top of the piston disc (143) is fixedly connected with a scale rod (144) slidably connected to the inside of the stabilizing plate (142), and a strong spring (145) is sleeved on the outer circumferential surface of the scale rod (144), and the strong spring (145) is located in the space surrounded by the stabilizing plate (142) and the piston disc (143).

2. The leg fitness training device according to claim 1, characterized in that: A retaining rod (3) for limiting the reverse pedaling part (13) is rotatably connected to the upper surface of the bracket (11), and a wrapping box (4) is fixedly connected to the side of the bracket (11) away from the retaining rod (3) through a connecting plate, and the connecting pipe (22) is located inside the wrapping box (4).

3. The leg fitness training device according to claim 1, characterized in that: The driving member (25) includes a driven rod (251). The accommodating box (21) is rotationally connected to the outer end of the driven rod (251) through a fixing seat provided on its top. A small gear (252) and a large gear (253) are respectively fixedly connected to the circumferential outer surface of the driven rod (251). A tooth groove (241) meshing with the outer side of the small gear (252) is formed on the circumferential outer surface of the lifting rod (24). The outer side of the large gear (253) is meshed with a driving tooth (254). A driving rod (255) is fixedly connected to the end face of the driving tooth (254). One end of the driving rod (255) away from the driving tooth (254) penetrates through the fixing seat and extends to the outside. The accommodating box (21) is rotationally connected to the circumferential outer surface of the driving rod (255) through a fixing block provided on its top.

4. A leg fitness training device according to claim 3, wherein: An opening tube (256) slidably connected to the outer surface of the lifting rod (24) is fixedly connected to the top of the accommodating box (21). The diameters of the driving tooth (254), the small gear (252), and the large gear (253) increase in sequence.

5. A leg fitness training device according to claim 3, wherein: A fine gear (257) is sleeved on the circumferential outer surface of the driving rod (255). A toothed plate (258) is slidably connected to the top of the accommodating box (21) through a slide rail. The top of the toothed plate (258) is meshed with the outer side of the fine gear (257). An L-shaped handle is fixedly connected to the end face of the toothed plate (258).

6. A leg fitness training device according to claim 1, wherein: The reverse pedaling part (13) includes a first sliding rod (131) and a second sliding rod (132). The outer surface of the support rod (12) is respectively slidably connected to the inside of the first sliding rod (131) and the second sliding rod (132). The first sliding rod (131) and the second sliding rod (132) are symmetrically distributed between adjacent support rods (12). A first sliding hole (133) is formed inside the first sliding rod (131). A second sliding hole (134) is formed inside the second sliding rod (132). A first clamping hole (135) coaxial with the second sliding hole (134) is formed inside the first sliding rod (131). A second clamping hole (136) coaxial with the first sliding hole (133) is formed inside the second sliding rod (132). A first inner sliding rod (137) fitting with the inner wall of the second clamping hole (136) is slidably connected inside the first sliding hole (133). A second inner sliding rod (138) fitting with the inner wall of the first clamping hole (135) is slidably connected inside the second sliding hole (134).

7. A leg fitness training device according to claim 6, wherein: Positioning grooves (139) are formed on the inner walls of the first sliding hole (133) and the second sliding hole (134). Reverse pedaling plates (130) are respectively fixedly connected to the outer sides of the first sliding rod (131) and the second sliding rod (132).

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