Sitting type leg stretching trainer

Abstract

The utility model discloses a sitting type leg stretching trainer, which relates to the technical field of sports equipment and comprises a base, a support arranged at the top of the base, a leg stretching component arranged at the top of the support, the leg stretching component comprises a fixing rod, an adjusting component arranged on one side of the fixing rod, the adjusting component comprises a turntable, a rotating rod connected onto the turntable, and a fixing shaft arranged on the rotating rod. A telescopic rod is arranged at the top of the fixing part, a spring sleeves the telescopic rod, an adjusting plate is connected to the top of the spring, a first rotating shaft is arranged at the bottom of the adjusting plate, a clamping block is connected to the bottom of the side, close to the fixing shaft, of the adjusting plate, and the clamping block is clamped in the clamping groove; a connecting rod is connected to the end, away from the rotating disc, of the rotating rod, a presser foot rod is connected to the side, away from the rotating rod, of the connecting rod, and by arranging the adjusting assembly, the distance between the seat cushion and the presser foot rod can be adjusted to adapt to different people, and knee joint damage caused by improper spacing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sports equipment, in particular to a sitting leg extension trainer. Background Art

[0002] A sitting leg extension trainer is a fitness device specifically designed to exercise and strengthen the leg muscles, especially the quadriceps on the front of the thighs. It usually consists of a seat, a backrest plate, a footrest, and a weight selection device. The user sits on the device, adjusts the sitting posture, and then places the feet on the footrest. By extending the knees, the user pushes the footrest forward, imitating the actions of cycling or pedaling in water. The weight selection device allows the user to adjust the resistance according to their own strength level to ensure an appropriate training intensity. This device is suitable for various groups of people, from rehabilitation patients to athletes, who can use it to enhance leg strength and overall health.

[0003] The existing Chinese patent (Publication No.: CN208481947U) proposes a split-action sitting leg extension trainer, which includes a base, a groove, a fixing plate, and a screw rod. A support frame is provided at the right end of the base.

[0004] Through the convex block provided on the support frame, the above technical solution effectively maintains the stability during the position adjustment of the seat on the leg extension trainer, preventing the seat from shaking when fitness people use the leg extension trainer.

[0005] However, the above device cannot adjust the distance between the foot pressing rod and the seat cushion. Since the back thickness and leg thickness of each person are different, the distance between the foot pressing rod and the seat cushion should also be different. Otherwise, it is easy to cause uneven stress on the knee joint and lead to injury. Therefore, we propose a sitting leg extension trainer. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a sitting leg extension trainer to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A sitting leg extension trainer, comprising a base, a bracket is arranged on the top of the base, a leg extension assembly is arranged on the top of the bracket, the leg extension assembly includes a fixed rod, an adjustment assembly is arranged on one side of the fixed rod, the adjustment assembly includes a turntable, a rotating rod is connected to the turntable, a fixed shaft is arranged on the rotating rod, a clamping groove is formed on the fixed shaft, a fixing member is arranged on the side of the rotating rod away from the turntable, a telescopic rod is arranged on the top of the fixing member, a spring is sleeved on the telescopic rod, the top of the spring is connected to an adjustment plate, a first rotating shaft is arranged at the bottom of the adjustment plate, the bottom of the first rotating shaft is rotatably connected to the fixing member, a clamping block is connected to the bottom of the side of the adjustment plate close to the fixed shaft, and the clamping block is clamped in the clamping groove. One end of the rotating rod away from the turntable is connected to a connecting rod, and one side of the connecting rod away from the rotating rod is connected to a foot pressing rod.

[0008] As a preferred embodiment, the leg extension assembly further includes a frame, the frame is arranged on the top of the bracket, a second rotating shaft is rotatably connected in the frame, the fixed rod is rotatably connected to the second rotating shaft, and an extension rod is fixedly connected to the side of the fixed rod away from the second rotating shaft.

[0009] Adopting the above technical solutions: By setting the leg extension assembly, it helps fitness people exercise the quadriceps femoris. By setting the extension rod, barbell plates can be hung to increase the weight.

[0010] As a preferred embodiment, a lifting assembly is arranged on one side of the top of the base close to the foot pressing rod, the lifting assembly includes a support leg, a sliding rod is slidably connected in the support leg, a round hole is formed in the support leg, a pin is inserted in the round hole, and a seat cushion is fixedly connected to the side of the sliding rod away from the support leg.

[0011] Adopting the above technical solutions: By setting the lifting assembly, the height of the seat cushion can be adjusted to adapt to people of different heights.

[0012] As a preferred embodiment, a support rod is arranged on one side of the bracket close to the fixed rod, a limiting member is fixedly connected to the side of the support rod away from the bracket, the material of the limiting member is foam, and the side of the limiting member away from the support rod is clamped with the fixed rod.

[0013] Adopting the above technical solutions: By setting the support rod and the limiting member, the fixed rod is limited to prevent the fixed rod from falling off and damaging the equipment.

[0014] As a preferred embodiment, there are two extension rods, and the two extension rods are respectively located on both sides of the base, and a sleeve is sleeved on the side of the extension rod away from the fixed rod.

[0015] Adopting the above technical solution: By setting the sleeve, the barbell plates on the extension rod can be limited and fixed, preventing the barbell plates from falling off during the leg extension movement.

[0016] As a preferred embodiment, a backrest is provided on one side of the top of the base close to the lifting component, and the inclination angle of the backrest is set to thirty degrees.

[0017] Adopting the above technical solution: By setting a backrest with an inclination angle of thirty degrees, the comfort of fitness people can be improved.

[0018] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0019] 1. In the present utility model, by setting the adjustment component, the distance between the seat cushion and the foot pressing rod can be adjusted to adapt to different people, avoiding knee joint damage caused by improper spacing. This solves the problem in the above device that the distance between the foot pressing rod and the seat cushion cannot be adjusted. Since the back thickness and leg thickness of each person are different, the distance between the foot pressing rod and the seat cushion should also be different, otherwise it is easy to cause uneven stress on the knee joint and lead to injury. By setting the lifting component, the height of the seat cushion can be adjusted to adapt to people of different heights. By setting the leg extension component, it helps fitness people exercise the quadriceps femoris. By setting the extension rod, barbell plates can be hung to increase the weight.

[0020] 2. In the present utility model, by setting the support rod and the limiting part, the fixing rod is limited to prevent the fixing rod from falling off and damaging the equipment. By setting the sleeve, the barbell plates on the extension rod can be limited and fixed, preventing the barbell plates from falling off during the leg extension movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the front view of a sitting leg extension trainer.

[0022] Figure 2 It is the structural diagram of the adjustment component in a sitting leg extension trainer.

[0023] Figure 3 It is the side view of a sitting leg extension trainer.

[0024] Figure 4 It is the structural diagram of the lifting component in a sitting leg extension trainer.

[0025] Reference numerals in the figures:

[0026] 1. Base;

[0027] 2. Adjustment component; 21. Turntable; 22. Fixed shaft; 23. Card slot; 24. Adjustment plate; 25. Block; 26. First rotating shaft; 27. Telescopic rod; 28. Spring; 29. Rotating rod;

[0028] 3. Bracket;

[0029] 4. Leg extension assembly; 41. Frame; 42. Second rotating shaft; 43. Fixed rod; 44. Extension rod;

[0030] 5. Sleeve; 6. Connecting rod; 7. Presser foot rod;

[0031] 8. Lifting assembly; 81. Support leg; 82. Sliding rod; 83. Round hole; 84. Plug; 9. Seat cushion; 10. Backrest; 11. Support rod; 12. Limiting member; 13. Fixing member. Detailed implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] As Figure 1 - Figure 2 shown, a sitting leg extension trainer includes a base 1. A bracket 3 is provided on the top of the base 1. A leg extension assembly 4 is provided on the top of the bracket 3. The leg extension assembly 4 includes a fixed rod 43. An adjusting assembly 2 is provided on one side of the fixed rod 43. The adjusting assembly 2 includes a turntable 21. A rotating rod 29 is connected to the turntable 21. A fixed shaft 22 is provided on the rotating rod 29. A slot 23 is opened on the fixed shaft 22. A fixing member 13 is provided on the side of the rotating rod 29 away from the turntable 21. A telescopic rod 27 is provided on the top of the fixing member 13. A spring 28 is sleeved on the telescopic rod 27. The top of the spring 28 is connected to an adjusting plate 24. A first rotating shaft 26 is provided at the bottom of the adjusting plate 24. The bottom of the first rotating shaft 26 is rotatably connected to the fixing member 13. A clamping block 25 is connected to the bottom of the side of the adjusting plate 24 close to the fixed shaft 22. The clamping block 25 is clamped in the slot 23. One end of the rotating rod 29 away from the turntable 21 is connected to a connecting rod 6. A presser foot rod 7 is connected to the side of the connecting rod 6 away from the rotating rod 29. By providing the adjusting assembly 2, using the telescopic rod 27 and the spring 28 sleeved thereon, pressing the adjusting plate 24 to lift the clamping block 25 at the bottom, then rotating the turntable 21 to drive the rotating rod 29 and the fixed shaft 22 provided thereon to rotate. The rotating rod 29 drives the connecting rod 6 and the presser foot rod 7 to rotate. The fixed shaft 22 drives the slot 23 opened thereon to rotate. Finally, releasing the adjusting plate 24 to clamp the clamping block 25 in the slot 23 to complete the adjustment of the distance between the presser foot rod 7 and the seat cushion 9 to adapt to different people and avoid knee joint damage caused by improper distance;

[0034] Furthermore, as Figure 1As shown in the figure: The leg extension assembly 4 further includes a frame 41. The frame 41 is arranged on the top of the bracket 3. A second rotating shaft 42 is rotatably connected inside the frame 41. A fixing rod 43 is rotatably connected to the second rotating shaft 42. One side of the fixing rod 43 away from the second rotating shaft 42 is fixedly connected with an extension rod 44. By setting the leg extension assembly 4, it helps fitness people exercise the quadriceps femoris. By setting the extension rod 44, barbell plates can be hung to increase the weight.

[0035] In the above solution, there is also a problem that since everyone has different heights, the height of the seat cushion 9 should also be adjustable. For example, Figure 4 As shown in the figure: On one side of the top of the base 1 close to the foot pressing rod 7, a lifting assembly 8 is arranged. The lifting assembly 8 includes a support leg 81. A sliding rod 82 is slidably connected inside the support leg 81. A round hole 83 is opened on the support leg 81. A pin 84 is inserted into the round hole 83. One side of the sliding rod 82 away from the support leg 81 is fixedly connected with a seat cushion 9. By setting the lifting assembly 8, the height of the seat cushion 9 can be adjusted by using the pin 84 and the round hole 83 to adapt to fitness people of different heights.

[0036] In the above solution, there is also a problem that when performing a leg extension movement, the barbell plates on the extension rod 44 will shake or even fall off, which is likely to cause injury to fitness people. For example, Figure 1 As shown in the figure: There are two extension rods 44, and the two extension rods 44 are respectively located on both sides of the base 1. A sleeve 5 is sleeved on one side of the extension rod 44 away from the fixing rod 43. By setting the sleeve 5, the barbell plates on the extension rod 44 can be limited and fixed to prevent the barbell plates from falling off during the leg extension movement.

[0037] Furthermore, for example, Figure 3 As shown in the figure: On one side of the bracket 3 close to the fixing rod 43, a support rod 11 is arranged. One side of the support rod 11 away from the bracket 3 is fixedly connected with a limiting member 12. The material of the limiting member 12 is foam. One side of the limiting member 12 away from the support rod 11 is clamped with the fixing rod 43. By setting the support rod 11 and the limiting member 12, the fixing rod 43 is limited to prevent the fixing rod 43 from falling off and damaging the equipment.

[0038] Furthermore, for example, Figure 1 As shown in the figure: On one side of the top of the base 1 close to the lifting assembly 8, a backrest 10 is arranged. The inclination angle of the backrest 10 is set to 30 degrees. By setting the backrest 10 with an inclination angle of 30 degrees, the comfort of fitness people can be improved.

[0039] Working principle: For example, Figure 1 - Figure 4As shown, the fitness person sits on the seat cushion 9, with the back against the backrest 10, hooks the legs on the foot pressing rod 7, and through the second rotating shaft 42 and the fixing rod 43 provided, completes the leg stretching action by lifting upwards, and barbell plates can be hung on the extension rod 44 to adapt to different weights. By setting the sleeve 5, the barbell plates on the extension rod 44 can be limited and fixed to prevent the barbell plates from falling off during the leg stretching movement. By setting the adjusting assembly 2, using the telescopic rod 27 and the spring 28 sleeved thereon, pressing the adjusting plate 24 to lift the bottom block 25, then rotating the turntable 21 to drive the rotating rod 29 and the fixing shaft 22 provided thereon to rotate. The rotating rod 29 drives the connecting rod 6 and the foot pressing rod 7 to rotate, and the fixing shaft 22 drives the card slot 23 opened thereon to rotate. Finally, releasing the adjusting plate 24 to snap the block 25 into the card slot 23 to complete the adjustment of the distance between the foot pressing rod 7 and the seat cushion 9 to adapt to different people and avoid knee joint damage caused by improper distance. Subsequently, through the lifting assembly 8 provided, the height of the seat cushion 9 can be adjusted by using the pin 84 and the round hole 83 to adapt to fitness people of different heights. By setting the support rod 11 and the limiting member 12, the fixing rod 43 is limited to prevent the fixing rod 43 from falling off and damaging the equipment. By setting the backrest 10 with an inclination angle of thirty degrees, the comfort of the fitness person can be improved.

[0040] The above are only the preferred embodiments of the present invention, and there is no restriction on the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the technical solution scope of the present invention, can make some changes or modifications into equivalent embodiments with the above-mentioned disclosed technical content. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the present invention.

Claims

1. A sitting leg stretching trainer, comprising a base (1), characterized in that: The top of the base (1) is provided with a bracket (3), the top of the bracket (3) is provided with a leg extension assembly (4), the leg extension assembly (4) comprises a fixing rod (43), one side of the fixing rod (43) is provided with an adjustment assembly (2), the adjustment assembly (2) comprises a turntable (21), the turntable (21) is connected with a rotating rod (29), a fixing shaft (22) is provided on the rotating rod (29), a slot (23) is provided on the fixing shaft (22), a fixing member (13) is provided on the side of the rotating rod (29) away from the turntable (21), and a telescopic rod is provided on the top of the fixing member (13). (27), a spring (28) is sleeved on the telescopic rod (27), the top of the spring (28) is connected to an adjusting plate (24), a first rotating shaft (26) is arranged at the bottom of the adjusting plate (24), the bottom of the first rotating shaft (26) is rotatably connected to the fixing member (13), a clamping block (25) is connected at the bottom of one side of the adjusting plate (24) close to the fixing shaft (22), the clamping block (25) is clamped in the clamping groove (23), the end of the rotating rod (29) away from the rotating disk (21) is connected to a connecting rod (6), and the side of the connecting rod (6) away from the rotating rod (29) is connected to a presser foot rod (7).

2. A sitting leg stretching trainer according to claim 1, characterized in that: The leg extension assembly (4) further comprises a frame (41), wherein the frame (41) is arranged on the top of the bracket (3), wherein a second rotating shaft (42) is rotatably connected inside the frame (41), wherein the fixed rod (43) is rotatably connected to the second rotating shaft (42), and an extension rod (44) is fixedly connected to a side of the fixed rod (43) away from the second rotating shaft (42).

3. A sitting leg stretching trainer according to claim 1, characterized in that: A lifting assembly (8) is arranged on one side of the top of the base (1) close to the presser foot rod (7), and the lifting assembly (8) comprises a supporting leg (81), a sliding rod (82) is slidably connected inside the supporting leg (81), a round hole (83) is opened on the supporting leg (81), a latch (84) is inserted into the round hole (83), and a seat cushion (9) is fixedly connected to the side of the sliding rod (82) away from the supporting leg (81).

4. A sitting leg stretching trainer according to claim 1, characterized in that: A support rod (11) is provided on a side of the bracket (3) close to the fixing rod (43); a side of the support rod (11) away from the bracket (3) is fixedly connected to a limiting member (12); the limiting member (12) is made of foam; and a side of the limiting member (12) away from the support rod (11) is clamped with the fixing rod (43).

5. A sitting leg stretching trainer according to claim 2, characterized in that: Two extension rods (44) are provided, and the two extension rods (44) are respectively located on both sides of the base (1), and a sleeve (5) is sleeved on the side of the extension rod (44) away from the fixed rod (43).

6. A sitting leg stretching trainer according to claim 3, characterized in that: A backrest (10) is provided on one side of the top of the base (1) close to the lifting assembly (8).

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