Pediatric lower limb fracture rehabilitation training device
By designing an adjustable rehabilitation training device, the problem of poor adaptability of existing devices has been solved, enabling rapid adaptation and stable rehabilitation training for children of different body types, and improving the versatility and safety of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE FIRST AFFILIATED HOSPITAL OF XIAMEN UNIV
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-31
AI Technical Summary
Existing pediatric lower limb fracture rehabilitation training devices cannot be adapted and adjusted according to the body shape of children of different ages, heights, and leg lengths, resulting in poor universality and easy misalignment of the affected limb and force shift, which affects the rehabilitation effect.
A rehabilitation training device was designed, comprising a seat, uprights, base, armrests, base plate, rotating plate, electric push rod, insertion rod, limiting hole, pin, and spring. The device achieves rapid adjustment and stable fixation through the horizontal movement and magnetic connection of the base plate, combined with the limiting of the insertion rod and the locking of the pin.
It enables rapid adjustment according to children of different heights and leg lengths, improving the applicability of the device, ensuring the stability and safety of rehabilitation training, and avoiding secondary injuries caused by device displacement.
Smart Images
Figure CN122478734A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of orthopedic pediatric rehabilitation equipment technology, specifically a rehabilitation training device for pediatric lower limb fractures. Background Technology
[0002] The Pediatric Lower Limb Fracture Rehabilitation Training Device is specially designed for children with fractures of the femur, tibia, fibula, hip, knee, and ankle. It is designed to address the characteristics of children's delicate bones, unclosed epiphyses, poor compliance, and growth and development. It is used during the fracture fixation, healing, and functional recovery periods. Under the premise of protecting the stability of the fracture ends and not affecting normal bone growth, it assists in passive and active joint movements, muscle strength training, weight-bearing transition, gait recovery, and prevention of muscle atrophy and joint stiffness and deformity.
[0003] Existing rehabilitation training devices for lower limb fractures in children have fixed positions for their rehabilitation training mechanisms, making it difficult to adapt and adjust them to children of different ages, heights, and leg lengths. They can only be used for children with fixed body types. Their versatility is extremely poor, requiring different devices for different children. This results in poor rehabilitation adaptability and can easily lead to problems such as misalignment of the affected limb and force shift, affecting the rehabilitation effect. Summary of the Invention
[0004] The purpose of this invention is to provide a rehabilitation training device for pediatric lower limb fractures to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a rehabilitation training device for pediatric lower limb fractures, comprising a seat, a column, and a base. The column is connected to the outer side of the bottom end of the seat, and a base is installed at the bottom end of the column. An armrest is connected to the top end of the column, and a base plate is fixedly connected to the middle of the top end of the armrest. A rotating plate is rotatably connected to one side of the outer wall of the base plate, and a crossbar is connected to the inner bottom end of the rotating plate. An electric push rod is rotatably connected to the middle of the rotating plate. An insertion rod is fixedly connected to the outer side of the top end of the armrest, and limiting holes corresponding to the insertion rod are opened on both sides of the middle of the base plate. A base is fixedly connected to the side of the column near the base plate, and a sliding plate is slidably connected inside the base plate. A pin is connected to the top end of the sliding plate, and a spring is connected to the bottom end. A positioning hole corresponding to the pin is opened in the middle of the bottom end of the base plate. The insertion rod, in conjunction with the limiting hole, is used to limit the horizontal movement of the substrate, while the pin, in conjunction with the positioning hole, is used to lock the horizontally moved substrate.
[0006] Preferably, the top end of the electric push rod is rotatably connected to the base plate to drive the rotating plate to rotate, and magnets are installed on both sides of the outer wall of the plug rod to magnetically connect with the rotating plate.
[0007] The user can move the base plate to detach it from the left crossbar, then move the base plate to connect it with the right crossbar. After that, push the crossbar so that the magnet on the other side of its outer wall is magnetically attached to the rotating plate, thereby switching the position of the base plate so that it can be switched between the left and right sides of the seat, making it convenient for rehabilitation training of the child's left or right leg.
[0008] Preferably, the bottom end of the spring is fixedly connected to the inner wall of the base, and the slide plate and the pin are in a "T" shape, wherein the slide plate, the pin and the spring constitute an elastic telescopic mechanism.
[0009] The spring returns the slide plate to its original position, allowing the pin to be inserted into the corresponding positioning hole, thereby locking the horizontally moved substrate again. Under the elastic force of the spring, the pin always maintains an upward pushing trend, ensuring the stability of the substrate in different positions.
[0010] Preferably, a transmission plate is connected to one side of the outer wall of the skateboard, and a pedal is fixedly connected to the bottom of the transmission plate. The skateboard, transmission plate and pedal are in a "C" shape. The column has a movable cavity inside that corresponds to the transmission plate, which works with the pedal to make the skateboard press down and move.
[0011] Medical staff or parents can press the pedal to move the transmission plate inside the column downward, which in turn pushes the slide plate to overcome the spring force and move downward, causing the pin to disengage from the positioning hole and release the locking state of the base plate.
[0012] As can be seen from the above, the pediatric lower limb fracture rehabilitation training device provided by the present invention has the following beneficial effects.
[0013] 1. Through the horizontal movement design of the base plate, combined with the initial positioning of the insertion rod and the limiting hole, and the secondary locking of the pin and the positioning hole, the position of the rehabilitation mechanism can be quickly adjusted to suit children of different heights and leg lengths. The rehabilitation needs of different children can be met without changing the device, thus expanding the applicability of the device.
[0014] 2. The push-to-unlock mechanism, consisting of a pedal, transmission plate, and slide plate, allows medical staff to unlock the base plate simply by pressing the pedal, without the need for additional tools. The operation is simple and quick, and the spring force can automatically reset and lock the pin, improving adjustment efficiency.
[0015] 3. The initial positioning of the insertion rod and the limiting hole can prevent the base plate from moving vertically; the secondary locking of the pin and the positioning hole can prevent the base plate from moving horizontally. The double locking structure ensures the stability of the base plate during rehabilitation training and avoids secondary damage caused by the displacement of the mechanism. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2This is a schematic diagram of the overall main structure of the present invention; Figure 3 This is a schematic diagram of the rear sectional structure of the column of the present invention; Figure 4 This is a three-dimensional structural diagram of the substrate, rotating plate, crossbar, and electric push rod of the present invention. Figure 5 This is a three-dimensional structural diagram of the limiting hole, base, and positioning hole of the present invention; Figure 6 This is a rear sectional view of the column, substrate, and base of the present invention. Figure 7 This is a three-dimensional structural diagram of the skateboard, pin, spring, and pedal of the present invention.
[0017] In the diagram: 1. Seat; 2. Column; 3. Base; 4. Armrest; 5. Base plate; 6. Rotating plate; 7. Crossbar; 8. Electric push rod; 9. Insert rod; 10. Limiting hole; 11. Base; 12. Slide plate; 13. Pin; 14. Spring; 15. Positioning hole; 16. Transmission plate; 17. Pedal. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figures 1-6 The present invention provides a technical solution: a rehabilitation training device for lower limb fractures in children, including a seat 1, a column 2 and a base 3. The column 2 is connected to the outer side of the bottom end of the seat 1, and the base 3 is installed at the bottom end of the column 2. The armrest 4 is connected to the top end of the column 2, and a base plate 5 is fixedly connected to the middle of the top end of the armrest 4. A rotating plate 6 is rotatably connected to one side of the outer wall of the base plate 5, and a crossbar 7 is connected to the inner bottom end of the rotating plate 6. An electric push rod 8 is rotatably connected to the middle of the rotating plate 6. A plug rod 9 is fixedly connected to the outer side of the top end of the armrest 4, and limiting holes 10 corresponding to the plug rod 9 are opened on both sides of the middle of the base plate 5. A base 11 is fixedly connected to the side of the column 2 near the base plate 5, and a sliding plate 12 is slidably connected inside the base 11. A pin 13 is connected to the top end of the sliding plate 12, and a spring 14 is connected to the bottom end. A positioning hole 15 corresponding to the pin 13 is opened in the middle of the bottom end of the base plate 5. The insertion rod 9, in conjunction with the limiting hole 10, is used to limit the horizontal movement of the substrate 5, and the pin 13, in conjunction with the positioning hole 15, is used to lock the horizontally moved substrate 5. The top of the electric push rod 8 is rotatably connected to the base plate 5 to drive the rotating plate 6 to rotate. Magnets are installed on both sides of the outer wall of the plug rod 9 and are magnetically connected to the rotating plate 6. The bottom of the spring 14 is fixedly connected to the inner wall of the base 11, and the slide plate 12 and the pin 13 are in a "T" shape. The slide plate 12, the pin 13 and the spring 14 form an elastic telescopic mechanism. A transmission plate 16 is connected to one side of the outer wall of the slide plate 12. The bottom of the transmission plate 16 is fixedly connected to the pedal 17, and the slide plate 12, the transmission plate 16 and the pedal 17 are in a "C" shape. The column 2 has an active cavity inside that corresponds to the transmission plate 16, which, together with the pedal 17, allows the slide plate 12 to be pressed down.
[0020] In specific implementation, participants Figure 1 and Figure 2 The upright column 2 provides stable support for the seat 1, the base 3 increases the contact area with the ground to prevent the device from tipping over and is suitable for the active nature of children; the armrest 4 provides hand support for the child and improves the stability of the sitting posture; the crossbar 7, together with Velcro, nylon straps and other components, fixes the child's lower limbs. Subsequently, the user can move the base plate 5 to disengage from the left crossbar 7, then move the base plate 5 to connect with the right crossbar 7, and then push the crossbar 7 so that the magnet on the other side of its outer wall is magnetically attached to the rotating plate 6, thereby switching the position of the base plate 5 so that it can be switched between the left and right sides of the seat 1, making it convenient for rehabilitation training of the child's left or right leg.
[0021] See Figure 5 , Figure 6 and Figure 7 Medical staff or parents can press the pedal 17 to move the transmission plate 16 inside the column 2 downward, thereby pushing the slide plate 12 to overcome the elastic force of the spring 14 and move downward, so that the pin 13 can be disengaged from the positioning hole 15 and the locking state of the base plate 5 can be released; then the base plate 5 can be moved to disengage from the plug 9 and the base plate 5 can be adjusted horizontally.
[0022] See Figure 3 and Figure 4 When the substrate 5 moves horizontally, the insert rod 9 can be inserted into the limiting hole 10 to initially limit the horizontally moved substrate 5 and prevent it from moving vertically. Then the spring 14 returns to its original position, causing the slide plate 12 to move upward and return to its original position, allowing the pin 13 to be inserted into the corresponding positioning hole 15, thereby locking the horizontally moved substrate 5 again. Under the elastic force of the spring 14, the pin 13 always maintains an upward pushing trend to ensure the stability of the substrate 5 in different positions.
[0023] In actual use, medical staff press the pedal 17, which drives the slide plate 12 to move down through the transmission plate 16, causing the pin 13 to exit from the positioning hole 15 and releasing the locking of the base plate 5; then the base plate 5 is moved horizontally, so that the rod 9 is inserted into the corresponding limiting hole 10 to complete the initial positioning; the pedal 17 is released, and the spring 14 pushes the slide plate 12 up, so that the pin 13 is inserted into the corresponding positioning hole 15 at the bottom of the base plate 5 to complete the secondary locking of the base plate 5, which is adapted to the height and leg length of the child.
[0024] Then, assist the child to sit in seat 1, backrest, and hold the armrests 4 for stability. Place the child's affected lower leg on the crossbar 7 at the bottom of the rotating board 6 and secure it with a strap to ensure that the limb is relatively fixed to the rotating board 6 and to prevent displacement during training. Next, start the electric push rod 8. The electric push rod 8 performs extension and retraction movements, pushing the rotating board 6 to swing back and forth around the pivot on the outside of the base plate 5, thereby driving the child's lower leg to complete passive flexion and extension training of the knee joint. By controlling the extension and retraction range and speed of the electric push rod 8, the range of motion and frequency of the knee joint can be adjusted to meet the needs of different rehabilitation stages. After training, the electric push rod 8 resets and the rotating plate 6 returns to its initial position; loosen the straps on the child's lower legs and assist the child to get out of the seat; if it is necessary to change the child or adjust the training position, press the pedal 17 repeatedly to release the locking of the base plate 5, adjust it to a suitable position, and then lock it again.
[0025] This solution, through the horizontal movement design of the base plate 5, combined with the initial positioning of the insertion rod 9 and the limiting hole 10, and the secondary locking of the pin 13 and the positioning hole 15, can quickly adjust the position of the rehabilitation mechanism to suit children of different heights and leg lengths. It can meet the rehabilitation needs of different children without changing the device, thus expanding the applicability of the device.
[0026] With the push-to-unlock mechanism consisting of pedal 17, transmission plate 16 and slide plate 12, medical staff can unlock the base plate 5 by simply pressing pedal 17 without using any additional tools. The operation is simple and quick. At the same time, the elasticity of spring 14 can realize the automatic reset and locking of pin 13, improving adjustment efficiency.
[0027] The initial positioning of the insertion rod 9 and the limiting hole 10 can prevent the base plate 5 from moving vertically; the secondary locking of the pin 13 and the positioning hole 15 can prevent the base plate 5 from moving horizontally. The double locking structure ensures the stability of the base plate 5 during rehabilitation training and avoids secondary damage caused by the displacement of the mechanism.
[0028] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.
Claims
1. A rehabilitation training device for pediatric lower limb fractures, comprising a seat (1), a column (2), and a base (3), wherein the column (2) is connected to the outer side of the bottom end of the seat (1), and the base (3) is installed at the bottom end of the column (2), characterized in that: The top of the column (2) is connected to a handrail (4), and a base plate (5) is fixedly connected to the middle of the top of the handrail (4). A rotating plate (6) is rotatably connected to one side of the outer wall of the base plate (5), and a crossbar (7) is connected inside the bottom of the rotating plate (6). An electric push rod (8) is rotatably connected to the middle of the rotating plate (6). A plug rod (9) is fixedly connected to the outer side of the top of the handrail (4), and limiting holes (10) corresponding to the plug rod (9) are opened on both sides of the middle of the base plate (5). A base (11) is fixedly connected to the side of the column (2) close to the base plate (5), and a sliding plate (12) is slidably connected inside the base (11). A pin (13) is connected to the top of the sliding plate (12), and a spring (14) is connected to the bottom. A positioning hole (15) corresponding to the pin (13) is opened in the middle of the bottom of the base plate (5). The insert (9) is used in conjunction with the limiting hole (10) to limit the horizontal movement of the substrate (5), and the pin (13) is used in conjunction with the positioning hole (15) to lock the horizontal movement of the substrate (5).
2. The pediatric lower limb fracture rehabilitation training device according to claim 1, characterized in that: The top of the electric push rod (8) is rotatably connected to the base plate (5) to drive the rotating plate (6) to rotate. Magnets are installed on both sides of the outer wall of the insert rod (9) and are magnetically connected to the rotating plate (6).
3. The pediatric lower limb fracture rehabilitation training device according to claim 2, characterized in that: The bottom end of the spring (14) is fixedly connected to the inner wall of the base (11), and the slide plate (12) and the pin (13) are in a "T" shape. The slide plate (12), the pin (13) and the spring (14) form an elastic telescopic mechanism.
4. The pediatric lower limb fracture rehabilitation training device according to claim 3, characterized in that: A transmission plate (16) is connected to one side of the outer wall of the slide (12). A pedal (17) is fixedly connected to the bottom of the transmission plate (16). The slide (12), transmission plate (16) and pedal (17) are in a "C" shape. The column (2) has an active cavity corresponding to the transmission plate 16 inside. The slide (12) is pressed down and moved down in conjunction with the pedal (17).