A leg exerciser
Patent Information
- Application Number
- CN202522226926.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-10-16
- Estimated Expiration
- 2035-10-22
AI Technical Summary
该结构在使用过程中存在以下问题：一是扭簧在挤压过程中会产生摩擦力，导致转动不灵活以及不够顺畅，还会发出运动噪音；二是由于扭簧在运动过程中不断张开和收拢，扭簧长时间使用容易产生形变，扭力产生改变甚至失效，导致夹腿器损坏，宿短使用寿命；三是夹腿器功能单一，只能进行夹腿训练，不能进行扩腿训练，严重影响腿部的训练效果，健身训练功能还有待进一步拓展
[0010] Compared with existing technologies, the above structure offers the following advantages: First, by using the seat support pin, which passes through the seat support adjustment hole and engages with the lower support hole, the seat can be adjusted to a low position. Furthermore, by using the backrest in conjunction with the seat, both lying down and seated training functions can be achieved. Second, by using the seat support pin, which passes through the seat support adjustment hole and engages with the upper support hole, the seat can be adjusted to a high position. Furthermore, by using the seat flip pin, which passes through different seat flip angle adjustment holes and engages with the seat locking hole, different angles of seat flipping can be achieved, thus enabling inclined support training. Third, by using the telescopic rod and connecting rod, the seat's forward and backward position can be adjusted to meet the requirements of different trainees, further expanding the functionality of the dumbbell bench.
Smart Images
Figure CN224853759U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sports and fitness equipment technology, and in particular to a leg exerciser that can perform both leg clamping and leg expansion exercises. Background Technology
[0002] With social development and improved living standards, people have increasingly higher demands for their physical health, leading to a continuous emergence of new and improved sports and fitness equipment. For example, the leg clamping device on the market is a type of sports and fitness equipment specifically designed for leg strength training. It includes a left swing arm, a right swing arm, a left leg rest, a right leg rest, and a connecting base. The left and right swing arms are mounted on the connecting base via torsion springs, while the left and right leg rests are correspondingly fixed to the left and right swing arms. The left and right swing arms naturally open due to the torsion of the torsion springs, and can come together under the force of the legs clamping together. When the legs are released, the left and right swing arms automatically open. The structure has the following problems during use: First, the torsion spring generates friction during compression, resulting in inflexible and uneven rotation, and also producing noise. Second, because the torsion spring constantly expands and contracts during movement, it is prone to deformation over time, altering the torque or even causing it to fail, leading to damage to the leg clamp and a shortened lifespan. Third, the leg clamp has a limited function, only allowing for leg clamping exercises and not leg expansion exercises, severely impacting the training effect on the legs, and its fitness training function needs further expansion. Therefore, many manufacturers and insightful individuals have conducted research and development, but so far, no ideal product has been launched. Summary of the Invention
[0003] To overcome the aforementioned defects of existing leg clamps, the purpose of this utility model is to provide a leg exercise device that has a simple and reasonable structure, smooth and flexible rotation, good training effect, long service life, and can be used for both leg clamping and leg expansion training.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems includes a bracket, a synchronous seat fixed on the bracket, a synchronous linkage mechanism, and an elastic component disposed on the bracket. The synchronous linkage mechanism includes a left connecting rod, a right connecting rod, a synchronous rod, a wheel frame, a rotating wheel, a third guide wheel, a second guide wheel, a first guide wheel, an adjusting handle, and a pull rope. The left connecting rod is rotatably connected to the left fixed shaft of the synchronous seat, and the right connecting rod, the wheel frame, and the rotating wheel are rotatably connected to the right fixed shaft of the synchronous seat. The synchronous rod is correspondingly hinged between the left and right connecting rods. A guide wheel is rotatably mounted on a bracket, a second guide wheel is rotatably mounted on a synchronous seat, and a third guide wheel is rotatably mounted on a wheel frame. One end of the pull rope is fixed to the rotating wheel, and the other end passes around the third guide wheel, the second guide wheel, and the first guide wheel and connects to the elastic component. An adjustable handle is mounted on the right connecting rod. The rotating wheel is provided with a first positioning hole that cooperates with the adjusting handle to achieve the leg clamping function and a second positioning hole that achieves the leg spreading function. The rotating wheel and the synchronous seat are respectively provided with a first limit pin and a second limit pin that restrict the wheel frame from rotating to the left.
[0005] In a further embodiment of this utility model, the left and right connecting rods are respectively hinged to a left support rod and a right support rod that can rotate 180 degrees via a rotating seat, and a left support pad and a right support pad are respectively fixed on the left support rod and the right support rod.
[0006] In a further embodiment of this utility model, a left foot pedal and a right foot pedal are fixedly attached to the left and right connecting rods respectively.
[0007] In a further embodiment of this utility model, a seat is provided on the bracket.
[0008] In a further embodiment of this utility model, the elastic component includes an elastic seat, an elastic element, and a rocker arm. The elastic seat is fixed on the bracket, the rocker arm is hinged on the bracket, the elastic element is connected between the elastic seat and the rocker arm, and the other end of the rocker arm is connected to a pull rope.
[0009] In a further embodiment of this utility model, the bracket is fixed with an anti-collision limiting pin that cooperates with the left or right connecting rod.
[0010] Compared with existing technologies, the above structure offers the following advantages: First, by using the seat support pin, which passes through the seat support adjustment hole and engages with the lower support hole, the seat can be adjusted to a low position. Furthermore, by using the backrest in conjunction with the seat, both lying down and seated training functions can be achieved. Second, by using the seat support pin, which passes through the seat support adjustment hole and engages with the upper support hole, the seat can be adjusted to a high position. Furthermore, by using the seat flip pin, which passes through different seat flip angle adjustment holes and engages with the seat locking hole, different angles of seat flipping can be achieved, thus enabling inclined support training. Third, by using the telescopic rod and connecting rod, the seat's forward and backward position can be adjusted to meet the requirements of different trainees, further expanding the functionality of the dumbbell bench. Attached Figure Description
[0011] Figure 1 This is a perspective view of the initial state of the clamping leg of this utility model.
[0012] Figure 2 This is a perspective view of the present invention in its initial state when the legs are retracted.
[0013] Figure 3 This is a first perspective view of the synchronous linkage mechanism of the present invention in the initial state of the leg clamping.
[0014] Figure 4 This is a second perspective view of the synchronous linkage mechanism of the present invention in the initial state of the leg clamping.
[0015] Figure 5 This is a three-dimensional view of the synchronous linkage mechanism of the clamping leg in the initial state of the present invention.
[0016] Figure 6 This is a perspective view of the initial state of the leg expansion of this utility model.
[0017] Figure 7 This is a perspective view of the leg-expanding state of this utility model.
[0018] Figure 8 This is a perspective view of the synchronous linkage mechanism of the present invention in the initial state of leg expansion.
[0019] Figure 9 This is a three-dimensional view of the synchronous linkage mechanism of the present invention when the leg expansion is in the starting state.
[0020] The components include: 1. Seat; 2. Right support pad; 3. Right support rod; 4. Adjustable handle; 5. Right connecting rod; 6. Anti-collision limit pin; 7. Synchronous linkage mechanism; 8. Right foot pedal; 9. First guide wheel; 10. Bracket; 11. Pull rope; 12. Rocker arm; 13. Left support pad; 14. Left support rod; 15. Synchronous rod; 16. Left connecting rod; 17. Elastic seat; 18. Rotating seat; 19. Elastic element; 20. Left foot pedal; 21. Synchronous seat; 22. Second guide wheel; 23. Third guide wheel; 24. Second positioning hole; 25. Rotating wheel; 26. First positioning hole; 27. First limit pin; 28. Wheel frame; 29. Second limit pin; 30. Pull rope fixing pin. Detailed Implementation
[0021] Figures 1 to 9The diagram shows a specific embodiment of a leg exercise device according to this utility model. It includes a support 10, a synchronous seat 21 fixed to the support 10, a synchronous linkage mechanism 7, and an elastic component mounted on the support 10. A seat 1 is mounted on the support 10. The synchronous linkage mechanism 7 includes a left connecting rod 16, a right connecting rod 5, a synchronous rod 15, a wheel frame 28, a rotating wheel 25, a third guide wheel 23, a second guide wheel 22, a first guide wheel 9, an adjusting handle 4, and a pull rope 11. The left connecting rod 16 is rotatably connected to the left fixed shaft of the synchronous seat 21. The right connecting rod 5, the wheel frame 28, and the rotating wheel 25 are rotatably connected to the right fixed shaft of the synchronous seat 21. The synchronous rod 15 is correspondingly hinged between the left connecting rod 16 and the right connecting rod 5. The first guide wheel 9 is rotatably mounted on the bracket 10, the second guide wheel 22 is rotatably mounted on the synchronous seat 21, and the third guide wheel 23 is rotatably mounted on the wheel frame 28. One end of the pull rope 11 is fixed to the rotating wheel 25 by the pull rope fixing pin 30, and the other end passes around the third guide wheel 23, the second guide wheel 22 and the first guide wheel 9 and is connected to the elastic component. The adjusting handle 4 is adjustable up and down on the right connecting rod 5. The rotating wheel 25 is provided with a first positioning hole 26 that cooperates with the adjusting handle 4 to realize the leg clamping function and a second positioning hole 24 that realizes the leg spreading function. The rotating wheel 25 and the synchronous seat 21 are respectively provided with a first limiting pin 27 and a second limiting pin 29 that restrict the wheel frame 28 from rotating to the left.
[0022] To accommodate the leg-clamping and leg-expanding functions, the left connecting rod 16 and the right connecting rod 5 are hinged to a left support rod 14 and a right support rod 3, respectively, via a rotating seat 18. A left support pad 13 and a right support pad 2 are fixed to the left support rod 14 and the right support rod 3, respectively. A left foot pedal 20 and a right foot pedal 8 are also fixed to the left connecting rod 16 and the right connecting rod 5, respectively.
[0023] To achieve adjustable elastic tension, the elastic component includes an elastic seat 17, an elastic element 19, and a rocker arm 12. The elastic seat 17 is fixed on the support 10, the rocker arm 12 is hinged to the support 10, and the elastic element 19 is connected between the elastic seat 17 and the rocker arm 12. The other end of the rocker arm 12 is connected to the pull rope 11. The elastic element 19 can be either an elastic pull rope or a tension spring. The elastic element 19 can be composed of multiple elastic pull ropes or tension springs. During training, the elastic pull ropes or tension springs can be added or removed according to different strength requirements to achieve adjustable tension and adapt to different strength requirements.
[0024] To prevent the left support rod 14 and the right support rod 3 from colliding with each other during leg clamping function training, the bracket 10 is fixed with an anti-collision limiting pin 6 that cooperates with the left connecting rod 16 or the right connecting rod 5.
[0025] The working principle of this invention for leg-clamping function training is as follows: In the initial state, such as Figure 1 , Figure 3 and Figure 4As shown, the adjusting handle 4 is fixed in place with the first positioning hole 26, the right connecting rod 5 is integrated with the rotating wheel 25, and the wheel frame 28 is tightly attached to the first limiting pin 27 and the second limiting pin 29 under the action of the pull rope 11. The contact surfaces of the left support pad 13 and the right support pad 2 with the legs face outward. The trainee sits on the seat 1, grips the handles of the seat 1 with both hands, places both feet on the left foot pedal 20 and the right foot pedal 8 respectively, and clamps the left support pad 13 and the right support pad 2 between the legs. When the legs squeeze the left support pad 13 and right support pad 2 inward, the left connecting rod 16 and right connecting rod 5 move inward synchronously against the elastic tension through the synchronizing rod 15. The right connecting rod 5 drives the rotating wheel 25 to rotate synchronously through the adjusting handle 4. The pull rope 11, which is fixed to the rotating wheel 25 through the pull rope fixing pin 30, pulls the rocker arm 12 through the third guide wheel 23, the second guide wheel 22, and the first guide wheel 9. The rocker arm 12 pulls the elastic element 19 to open until the right connecting rod 5 contacts the anti-collision limit pin 6, and the leg-clamping movement ends. Figure 2 and Figure 5 As shown. Simultaneously, under the action of the pull rope 11 on the third guide wheel 23, the wheel frame 28 is pressed against the second limit pin 29. The wheel frame 28 and the synchronous seat 21 remain stationary. The main function of the wheel frame 2 and the third guide wheel 23 is to always keep the pull rope 11 pressed against the rotating wheel 25, ensuring that the pulling force remains constant when switching between the leg-clamping and leg-expanding functions. When the legs are released, the synchronous linkage mechanism 7 automatically resets under the elastic force of the elastic element 19.
[0026] The working principle of this utility model for leg-expanding function training is as follows: Adjusting handle 4 in... Figure 1 , Figure 3 and Figure 4 Based on the separation from the first positioning hole 26, rotate the right connecting rod 5 to the position of the second positioning hole 24, adjust the handle 4 to cooperate and fix it with the second positioning hole 24, the right connecting rod 5 is connected to the rotating wheel 25 as one unit, the wheel frame 28 is tightly attached to the first limit pin 27 and the second limit pin 29 under the action of the pull rope 11, the left support rod 14 and the right support rod 3 rotate 180 degrees, so that the contact surfaces of the left support pad 13 and the right support pad 2 with the legs face inward, as... Figure 6 and Figure 8 As shown. The trainee sits on seat 1, gripping the handles firmly with both hands, and placing both feet on the left footrest 20 and right footrest 8 respectively, with their legs resting on the left support pad 13 and right support pad 2. When the legs forcefully push outwards to open the left support pad 13 and right support pad 2, the left connecting rod 16 and right connecting rod 5 move outwards synchronously against the elastic tension through the synchronizing rod 15. The right connecting rod 5 drives the rotating wheel 25 to rotate synchronously through the adjusting handle 4. The wheel frame 28 also rotates synchronously under the push of the first limit pin 27. The rope 11, fixed to the rotating wheel 25 by the rope fixing pin 30, pulls the rocker arm 12 through the third guide wheel 23, the second guide wheel 22, and the first guide wheel 9. The rocker arm 12 pulls the elastic element 19 to open until the leg-expanding exercise ends. Figure 7 and Figure 9As shown. The main function of the wheel frame 2 and the third guide wheel 23 is to keep the pull rope 11 close to the rotating wheel 25, ensuring that the elastic tension remains unchanged when switching between the leg clamping function and the leg spreading function. When the legs are released, the synchronous linkage mechanism 7 automatically resets under the elastic force of the elastic element 19.
[0027] The above description is merely a specific embodiment of this utility model and does not constitute any limitation on this utility model. Any simple modifications, equivalent changes, or alterations made without departing from the technical solution of this utility model shall fall within the protection scope of this utility model.
Claims
1. A leg exercise device, comprising a support (10), a synchronization seat (21) fixed on the support (10), a synchronization linkage mechanism (7), and an elastic component disposed on the support (10), characterized in that: The synchronous linkage mechanism (7) includes a left connecting rod (16), a right connecting rod (5), a synchronous rod (15), a wheel frame (28), a rotating wheel (25), a third guide wheel (23), a second guide wheel (22), a first guide wheel (9), an adjusting handle (4), and a pull rope (11). The left connecting rod (16) is rotatably connected to the left fixed shaft of the synchronous seat (21). The right connecting rod (5), the wheel frame (28), and the rotating wheel (25) are rotatably connected to the right fixed shaft of the synchronous seat (21). The synchronous rod (15) is correspondingly hinged between the left connecting rod (16) and the right connecting rod (5). The first guide wheel (9) is rotatably mounted on the bracket (10), and the second guide wheel (22) is rotatably mounted on the bracket (10). The third guide wheel (23) is rotatably mounted on the wheel frame (28) and set on the synchronous seat (21). One end of the pull rope (11) is fixed on the rotating wheel (25), and the other end passes around the third guide wheel (23), the second guide wheel (22) and the first guide wheel (9) and is connected to the elastic component. The adjusting handle (4) is adjustable up and down on the right connecting rod (5). The rotating wheel (25) is provided with a first positioning hole (26) that cooperates with the adjusting handle (4) to realize the leg clamping function and a second positioning hole (24) that realizes the leg spreading function. The rotating wheel (25) and the synchronous seat (21) are respectively provided with a first limiting pin (27) and a second limiting pin (29) that restrict the wheel frame (28) from rotating to the left.
2. The leg exercise device according to claim 1, characterized in that: The left connecting rod (16) and the right connecting rod (5) are respectively hinged to a left support rod (14) and a right support rod (3) that can rotate 180 degrees via a rotating seat (18). A left support pad (13) and a right support pad (2) are respectively fixed on the left support rod (14) and the right support rod (3).
3. The leg exercise device according to claim 2, characterized in that: The left connecting rod (16) and the right connecting rod (5) are respectively fixed with a left foot pedal (20) and a right foot pedal (8).
4. A leg exerciser according to claim 1, characterized in that: The bracket (10) is provided with a seat (1).
5. A leg exerciser according to claim 1, characterized in that: The elastic component includes an elastic seat (17), an elastic element (19), and a rocker arm (12). The elastic seat (17) is fixed on the bracket (10), the rocker arm (12) is hinged on the bracket (10), the elastic element (19) is connected between the elastic seat (17) and the rocker arm (12), and the other end of the rocker arm (12) is connected to the pull rope (11).
6. A leg exerciser according to claim 1, characterized in that: The bracket (10) is fixed with an anti-collision limiting pin (6) that cooperates with the left connecting rod (16) or the right connecting rod (5).