Lightweight high-rigidity damping energy feedback type artificial limb foot plate for children

Abstract

The invention discloses a lightweight high-rigidity damping energy feedback type artificial limb foot plate for children, belongs to the technical field of artificial limbs, and aims to solve the problems that an existing artificial limb foot plate for children is poor in adaptability, limited in damping effect, insufficient in ventilation and moisture removal and poor in structural stability. The artificial limb foot plate comprises an artificial limb receiving cavity, an upper mounting base, a lower mounting base, a lower plate, an upper plate and a functional assembly, the artificial limb receiving cavity is detachably connected with the upper mounting base through a connecting assembly, the connecting assembly can adjust the mounting height, the upper mounting base and the lower mounting base are matched through a main rotating shaft, and a buffering assembly is arranged at the top of the lower mounting base to achieve damping springback. The extension length of the upper plate and the lower plate is adjusted through multiple sets of threaded mounting holes, the exhaust assembly at the bottom of the upper plate can exhaust damp and hot gas in the receiving cavity, the upper mounting base is provided with the clamping plate to fix the gas inlet pipe, and the structure is optimized through cooperation of multiple assemblies, the child growth requirement is met, the damping and ventilation performance is improved, and the service life is prolonged; the device is suitable for being worn by children with disabled limbs in daily life.

Description

Technical Field

[0001] This invention relates to the field of prosthetics, and more particularly to a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children. Background Technology

[0002] Children with limb disabilities rely on prosthetic footplates to maintain normal walking and motor function, and their needs differ significantly from those of adults. Children are in a rapid growth and development stage, and their limb size, weight, and motor ability continue to change with age. At the same time, their metabolism is vigorous, and their residual limbs tend to sweat a lot after exercise. In addition, their daily activities involve large ranges of motion and frequent changes in impact, which places higher demands on the fit, comfort, stability, and durability of prosthetic footplates.

[0003] Existing prosthetic footplates for children mostly use simplified adult structures, making it difficult to balance lightweight design with high rigidity. Long-term use can easily lead to deformation or damage due to insufficient structural strength. Regarding fit and adjustment, most products offer only one method for adjusting the installation spacing and extension length, failing to flexibly adapt to a child's growth pace. This results in short fitting cycles and frequent replacements of the prosthetic footplate, increasing usage costs.

[0004] In terms of shock absorption, traditional prosthetic footplates often use a single elastic component to cushion vibrations, resulting in limited cushioning effect and low energy feedback efficiency. This makes them unsuitable for adapting to children's varied movement patterns, and long-term use may adversely affect the development of limb joints and bones. Furthermore, the prosthetic socket is mostly a closed structure, preventing the timely release of warm, moist air generated by sweating from the residual limb. This can lead to skin maceration and slipperiness, reducing wearing comfort and potentially causing bacterial growth. In severe cases, it can even lead to prosthesis dislodgement, compromising safety. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing children's prosthetic footplates, which mostly use simplified adult structures, making it difficult to balance lightweight and high rigidity requirements, cannot be flexibly adjusted according to children's growth pace, have limited cushioning effect, and have low energy feedback efficiency. Therefore, this invention proposes a lightweight, high-rigidity shock-absorbing energy feedback type children's prosthetic footplate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A lightweight, high-rigidity, shock-absorbing, energy-feedback type prosthetic footplate for children includes a prosthetic receiving cavity, the bottom of which is detachably fitted with an upper mounting base via a connecting assembly, and a main rotating shaft is fixedly connected through the upper mounting base. The lower mounting base has the main rotating shaft rotatably passing through it. The lower mounting base has a buffer assembly at the top and multiple limit bolts threaded to its bottom. The upper plate and the lower plate are provided. The upper plate has multiple threaded mounting holes I at one end. The limiting bolts are threaded through the threaded mounting holes I to lock the upper plate and the lower mounting seat. Two symmetrical fixing bolts are fixed on one side of the top of the lower plate. The upper plate has multiple sets of threaded mounting holes II that are staggered front and back. The fixing bolts are threaded through the threaded mounting holes II and are threaded with fixing nuts. The upper plate extension length can be adjusted by selecting different threaded mounting holes II for mounting and fixing bolts to suit the growth needs of children. The fixing nut locks in place to achieve a stable connection between the upper and lower plates.

[0007] In one possible design, the connecting assembly includes an upper connecting seat fixed to the bottom of the prosthesis receiving cavity and a lower connecting seat fixed to the top of the upper mounting seat. Both the upper and lower connecting seats are threaded with multiple mounting bolts. A threaded rod is fixedly connected through the lower connecting seat, and the upper connecting seat is threadedly sleeved on the top of the threaded rod. The outer wall of the threaded rod is threaded with multiple support nuts and washers. The support nuts and washers are sandwiched between the upper connecting seat and the lower connecting seat. Rotating the support nuts can adjust the distance between them, and the washers increase the support contact area to improve stability.

[0008] In one possible design, the buffer assembly includes two symmetrically fixed auxiliary rotating shafts I that pass through the lower mounting base. The outer wall of the upper mounting base has two strip holes. A limiting block slides through the strip holes. Mounting blocks are rotatably sleeved on both the limiting block and the outer wall of the auxiliary rotating shaft I. The same compression spring abuts between the two opposing mounting blocks. When the upper mounting base rotates around the main rotating shaft, the compression spring on one side is stretched and the other side is squeezed. In conjunction with the limit block sliding along the strip hole, the vibration energy is consumed, and a smooth rebound is achieved to buffer the impact.

[0009] In one possible design, both ends of the compression spring abut against the mounting block via spring seats. The limiting block and the outer wall of the auxiliary rotating shaft I are both threaded with limiting elements. The limiting elements abut against the outer walls of the upper and lower mounting seats to lock the position of the mounting block and prevent the components from shifting during the buffering process.

[0010] In one possible design, the bottom of the upper plate is provided with an exhaust assembly, the exhaust assembly includes an air bladder fixed to the bottom of the upper plate, two connecting pipes are fixed to the side of the air bladder, a filter plate is snapped to one end of the connecting pipe, a threaded sleeve is threaded on the outer wall, and a pressure ring is fixed on the inner wall of the threaded sleeve. The pressure ring presses the filter plate to achieve a limiting position. The connecting pipe is equipped with a one-way valve inside, and one of the threaded sleeves is fixedly connected to a connected air inlet pipe. The other end of the air inlet pipe is connected to the bottom of the prosthesis receiving cavity. When the upper plate squeezes and rebounds the airbag, the one-way valve is used to extract the hot and humid exhaust gas.

[0011] In one possible design, one end of the threaded sleeve is provided with an air outlet for discharging hot and humid exhaust gas from inside the airbag. The filter plate can block impurities from entering the airbag and the prosthesis receiving cavity. The threaded sleeve can be disassembled to clean the filter plate and ensure gas flow efficiency.

[0012] In one possible design, an elliptical hole is provided on one side of the upper mounting base, a fixed clamping plate is fixedly installed in the elliptical hole, and a sliding clamping plate is slidably assembled therein. Arc-shaped holes are provided on the opposite sides of the sliding clamping plate and the fixed clamping plate for clamping the air intake pipe. An adjusting bolt is rotatably inserted on one side of the upper mounting base. The adjusting bolt is threaded into the sliding clamp. Rotating the adjusting bolt can drive the sliding clamp to approach the fixed clamp, thereby achieving a stable clamping of the air intake pipe and preventing wear and tear during movement.

[0013] In one possible design, the compression spring is made of high-strength alloy spring steel, which has excellent elastic recovery and fatigue resistance, and is suitable for the impact force generated by children's frequent movements.

[0014] In one possible design, the upper and lower plates are made of high-strength, lightweight aluminum alloy, balancing the requirements of lightweight and rigidity; the air intake pipe is made of medical-grade soft plastic tubing, which can adapt to structural deformation during movement and extend service life.

[0015] In this application, during use, the upper plate is fixedly installed at the bottom of the lower mounting base by limiting bolts and threaded mounting holes I, and the upper plate is fixedly installed at the top of the lower plate by fixing bolts and fixing nuts. Since there are multiple sets of threaded mounting holes II in different positions, the fixing bolts are passed through the threaded mounting holes II in different positions and then threadedly connected to the fixing nuts, thereby adjusting the extension length of the upper plate and improving the applicability of the device. Since the lower connecting seat is fixedly installed on the top of the upper mounting seat, and a threaded rod is fixedly embedded inside the lower connecting seat, the upper connecting seat is threaded on the top of the threaded rod, and multiple support nuts and washers are threaded on the threaded rod and located between the upper and lower connecting seats, the distance between the upper and lower connecting seats can be changed, and the upper connecting seat is supported to ensure stability. When children use the prosthesis, their high metabolism makes their residual limbs prone to sweating after exercise. Since the prosthesis socket is sealed, sweat cannot escape, leading to skin maceration, slippery detachment (prosthesis flying off), or bacterial growth. In this situation, the upper plate compresses the airbag during use. Because both connecting tubes have one-way valves, the airbag draws the hot, humid air from the prosthesis socket into the airbag through the air inlet tube. After the upper plate rebounds, the airbag is then expelled through the connecting tube on the other side. Furthermore, since two connecting pipes are fixedly installed on the outer wall of the airbag, each connecting pipe is threaded with a threaded sleeve. The threaded sleeve presses the filter plate to one end of the connecting pipe through the pressure ring on the inner wall. The threaded sleeve used for exhaust is directly connected to the atmosphere, while the threaded sleeve used for intake is connected to one end of the intake pipe. The threaded sleeve can be quickly disassembled, which is convenient for cleaning the filter plate and can also prevent impurities from entering the interior of the airbag. The outer wall of the intake pipe is clamped by sliding clamps and fixed clamps to prevent snagging. Moreover, by adjusting the clamping position, space can be left for the upper and lower sides to swing, thus extending the service life. When a child is moving, the vibration is transmitted through the upper mounting base, which is supported by two compression springs. When the upper mounting base rotates around the main rotating shaft, the compression spring on one side is stretched and the spring on the other side is squeezed. At the same time, the auxiliary rotating shaft II slides inside the strip hole, achieving a cushioning effect through friction and gradually rebounding to facilitate the next cushioning.

[0016] Beneficial effects: In terms of adaptability, the upper and lower plates are connected by fixing bolts, fixing nuts, and multiple sets of threaded mounting holes II at different front and rear positions. The extension length of the upper plate can be adjusted by selecting different positions of the threaded mounting holes II to adapt to the limb size and movement needs of children at different growth stages, expanding the product's applicability, reducing the frequency of prosthetic footplate replacements, and lowering usage costs. In the connecting components, the threaded rod, in conjunction with the support nut and washer, can flexibly adjust the distance between the upper and lower connecting seats, thereby adjusting the installation height of the prosthetic socket. At the same time, the synergistic effect of the support nut and washer enhances support stability, adapting to different residual limb lengths and wearing angle requirements.

[0017] In terms of shock absorption and energy feedback performance, the buffer assembly achieves relative rotation between the upper and lower mounting seats via a main rotating shaft. This, along with a sliding limit block within the slotted hole, auxiliary rotating shaft I, and compression springs, forms an elastic buffer structure. During movement, as the upper mounting seat rotates around the main rotating shaft, the compression springs on both sides perform stretching and compressing actions respectively. The spring force buffers the vibration impact, while the limit block slides along the slotted hole and, in conjunction with friction, gradually dissipates the vibration energy, achieving smooth rebound and providing support for the next buffering action. This adapts to the changing movement patterns of children and reduces the adverse effects of vibration on limb joints and bone development. The limiting structure on the limit block and auxiliary rotating shaft I fixes the position of the mounting block, preventing displacement of the assembly during buffering and improving structural stability.

[0018] The breathability and moisture-wicking performance are significantly improved. The exhaust assembly, through the coordinated action of the airbag, air inlet pipe, and connecting pipe, utilizes the squeezing and rebound motion of the upper plate during movement, combined with a one-way valve to achieve unidirectional airflow. When the upper plate squeezes the airbag, the hot and humid exhaust gas inside the prosthesis socket is drawn into the airbag through the air inlet pipe; when the upper plate rebounds, the hot and humid exhaust gas is discharged through the connecting pipe on the other side, effectively solving the problem of sweat accumulation caused by the sealed socket, avoiding skin maceration, slipperiness, and bacterial growth, reducing the risk of prosthesis dislodgement, and improving wearing comfort and safety. The filter plate can block impurities from entering the airbag and socket. The threaded sleeve fixes the filter plate with a pressure ring, making it easy to install and remove, facilitating regular cleaning of the filter plate, ensuring efficient gas flow, while the one-way valve structure prevents exhaust gas backflow and the entry of external impurities.

[0019] In terms of structural stability and durability, the fixed and sliding clamps on the upper mounting base, connected by adjusting bolts, stably clamp the air intake pipe, preventing it from snagging or wearing during movement. The clamping position can be adjusted to allow for some play on both sides of the pipe, accommodating structural deformation during movement and extending the pipe's lifespan. The adjusting bolts facilitate quick adjustment of the clamping force, adapting to air intake pipes of different diameters and enhancing structural versatility. The overall structure employs detachable connections, such as mounting bolts and limit bolts for connecting components, facilitating component disassembly, maintenance, and replacement, reducing future maintenance costs. It also balances lightweight design with rigidity requirements, meeting the intensity demands of children's daily activities and extending the overall product lifespan. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a lightweight, high-rigidity, shock-absorbing energy feedback prosthetic footplate for children proposed in this invention. Figure 2 This is an exploded view of the lower and upper plates of a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children proposed in this invention. Figure 3 This is an exploded view of the air bladder and trachea in the footplate of a lightweight, high-rigidity, shock-absorbing energy feedback prosthesis for children proposed in this invention. Figure 4 This is an exploded view of the air outlet tube and threaded sleeve in a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children proposed in this invention. Figure 5 This is an exploded view of the lower and upper connecting seats of a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children proposed in this invention. Figure 6 This is a three-dimensional diagram of the lower and upper mounting bases of a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children proposed in this invention. Figure 7This is a three-dimensional diagram of the mounting block and lower mounting base in a lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children proposed in this invention.

[0021] In the diagram: 1. Prosthetic socket; 2. Upper connecting seat; 3. Upper mounting seat; 4. Lower plate; 5. Airbag; 6. Upper plate; 7. Fixing bolt; 8. Air inlet pipe; 9. Threaded mounting hole I; 10. Threaded mounting hole II; 11. Fixing nut; 12. Connecting pipe; 13. Air outlet; 14. Threaded sleeve; 15. Pressure ring; 16. Filter plate; 17. Pad plate; 18. Support nut; 19. Threaded rod; 20. Lower connecting seat; 21. Sliding clamp; 22. Fixing clamp; 23. Main rotating shaft; 24. Limiting bolt; 25. Lower mounting seat; 26. Strip hole; 27. Adjusting bolt; 28. Mounting bolt; 29. ​​Limiting block; 30. Auxiliary rotating shaft I; 31. Compression spring; 32. Auxiliary rotating shaft II; 33. Mounting block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In one embodiment: Refer to Figure 1-7The prosthetic footplate of this embodiment comprises core components including a prosthetic socket 1, an upper mounting base 3, a lower mounting base 25, a lower plate 4, an upper plate 6, and corresponding functional components. These components work together to achieve adaptation, adjustment, shock absorption, cushioning, ventilation, moisture removal, and structural stability. Specifically, a connecting component is mounted at the bottom of the prosthetic socket 1, which is detachably connected to the upper mounting base 3. A main rotating shaft 23 is fixedly inserted through the upper mounting base 3, and the main rotating shaft 23 simultaneously rotates through the lower mounting base 25, allowing the upper mounting base 3 and the lower mounting base 25 to rotate relative to each other. A cushioning component is installed at the top of the lower mounting base 25, and multiple limiting bolts 24 are threadedly connected to its bottom. Multiple threaded mounting holes I9 are opened at one end of the upper plate 6. The limiting bolts 24 are threaded through the threaded mounting holes I9 to fix the upper plate 6 and the lower mounting base 25. Based on this, the connection accuracy between the upper plate 6 and the lower mounting base 25 can be finely adjusted by adjusting the mounting positions of the limiting bolts 24 in different threaded mounting holes I9. Two symmetrically arranged fixing bolts 7 are fixedly installed on one side of the top of the lower plate 4. Multiple sets of threaded mounting holes II10 with different front and rear positions are opened inside the upper plate 6. There are two threaded mounting holes II10 in each set. After the fixing bolts 7 pass through the threaded mounting holes II10 at the selected positions, the fixing nuts 11 are threaded on the outer wall. After the fixing nuts 11 are tightened, the upper plate 6 and the lower plate 4 are firmly connected. By using multiple sets of threaded mounting holes II10 at different positions, the extension length of the upper plate 6 can be flexibly adjusted to adapt to the limb size and movement needs of children at different growth stages, reduce the frequency of replacement of prosthetic footplates, and reduce the cost of use. Furthermore, the connecting assembly includes an upper connecting seat 2 fixedly installed at the bottom of the prosthetic receiving cavity 1, and a lower connecting seat 20 fixedly installed at the top of the upper mounting seat 3. Both the lower connecting seat 20 and the upper connecting seat 2 have multiple mounting bolts 28 threaded through them. The mounting bolts 28 are used to fix the upper connecting seat 2 to the prosthetic receiving cavity 1 and the lower connecting seat 20 to the upper mounting seat 3, respectively. A threaded rod 19 is fixedly installed inside the lower connecting seat 20. The upper connecting seat 2 is threadedly sleeved on the top of the threaded rod 19. Multiple support nuts 18 and washers 17 are threadedly sleeved on the outer wall of the threaded rod 19. The support nuts 18 and washers 17 are located between the upper connecting seat 2 and the lower connecting seat 20. Rotating the support nuts 18 can change the distance between the upper connecting seat 2 and the lower connecting seat 20, thereby adjusting the installation height of the prosthetic receiving cavity 1. At the same time, the washers 17 can increase the support contact area, improve the overall support stability, and adapt to different residual limb lengths and wearing angle requirements.

[0024] The buffer assembly includes two symmetrically arranged auxiliary rotating shafts I 30 fixedly inserted inside the lower mounting base 25. Two slotted holes 26 are formed on the outer wall of the upper mounting base 3, through which a limiting block 29 slides. Mounting blocks 33 are rotatably fitted onto the outer walls of both the limiting block 29 and the auxiliary rotating shafts I 30. A compression spring 31 is positioned between the two corresponding mounting blocks 33. Both ends of the compression spring 31 abut against one end of each mounting block 33 via spring seats. A damping sleeve (not shown in the figure) is fitted onto the outer side of the compression spring 31. A wear-resistant damping layer (not shown in the figure) is provided on the inner wall of the slotted holes 26. Limiting elements are threaded onto the outer walls of both the limiting block 29 and the auxiliary rotating shafts I 30, abutting against the outer walls of the upper mounting base 3 and the lower mounting base 25, thus fixing the position of the mounting blocks 33. Preferably, the compression spring 31 is made of high-strength alloy spring steel, possessing good elastic recovery and fatigue resistance, and can withstand the impact force generated by frequent movement of children. When a child moves, the vibration is transmitted through the upper mounting base 3. The upper mounting base 3 rotates around the main rotating shaft 23. At this time, the compression spring 31 on one side is stretched and the other side is squeezed. The spring force buffers the vibration impact. At the same time, the limiting block 29 slides along the strip hole 26. The friction between the limiting block and the inner wall of the strip hole gradually consumes the vibration energy, achieving a smooth rebound and providing support for the next buffering. This reduces the adverse effects of vibration on the development of limb joints and bones. The limiting component can prevent the mounting block 33 from shifting during the buffering process, ensuring the stable operation of the buffer assembly.

[0025] An exhaust assembly is provided at the bottom of the upper plate 6 for venting the prosthesis socket 1. The exhaust assembly includes an airbag 5 fixedly installed at the bottom of the upper plate 6. Two connecting pipes 12 are fixedly installed on the side of the airbag 5. Each connecting pipe 12 has a filter plate 16 snapped into one end. A threaded sleeve 14 is threaded onto the outer wall of the connecting pipe 12. An air outlet 13 is opened at one end of the threaded sleeve 14. A pressure ring 15 is fixedly installed on the inner wall. After the threaded sleeve 14 is tightened, the pressure ring 15 presses the filter plate 16 against the end of the connecting pipe 12, thereby limiting and fixing the filter plate 16. Specifically, a one-way valve is provided inside the connecting pipe 12. One end of one of the threaded sleeves 14 is fixedly installed with a connected air inlet pipe 8. The other end of the air inlet pipe 8 is connected to the bottom of the prosthesis socket 1. Preferably, the air inlet pipe 8 is made of medical-grade soft plastic tubing, which has both flexibility and wear resistance and can adapt to structural deformation during movement. When a child's residual limb sweats after exercise, producing hot and humid gas, the upper plate 6 compresses the airbag 5 during movement. Under the action of the one-way valve, the hot and humid gas inside the prosthesis socket 1 is drawn into the airbag 5 through the air inlet pipe 8. When the upper plate 6 rebounds, the air pressure inside the airbag 5 changes, and the hot and humid gas is discharged through the air outlet 13 of the connecting pipe 12 on the other side. This effectively solves the problem of sweat accumulation caused by the sealed socket, avoids skin maceration and slipperiness and bacterial growth, and reduces the risk of prosthesis dislodgement. The filter plate 16 can block external impurities from entering the airbag 5 and the socket. The threaded sleeve 14 is removable, which facilitates regular cleaning of the filter plate 16 and ensures gas flow efficiency. The one-way valve can also prevent the backflow of waste gas and the entry of external impurities.

[0026] This application can be used in the field of prosthetics, or in other fields applicable to this application.

[0027] In another embodiment: Reference Figure 1-7A lightweight, high-rigidity, shock-absorbing energy feedback type prosthetic footplate for children is used in the field of prostheses. The structure of this embodiment is basically the same as that of the previous embodiment, except that: an elliptical hole is opened on one side of the upper mounting base 3, and a fixed clamping plate 22 is fixedly installed inside the elliptical hole. At the same time, a sliding clamping plate 21 is slidably installed. Arc-shaped holes are opened on the sides of the sliding clamping plate 21 and the fixed clamping plate 22 that are close to each other. The arc-shaped holes fit the outer wall of the air inlet pipe 8 to clamp the air inlet pipe 8. An adjusting bolt 27 is rotatably passed through one side of the upper mounting base 3. One end of the adjusting bolt 27 extends into the elliptical hole and is threaded into the sliding clamping plate 21. A threaded groove is opened on one side of the sliding clamping plate 21 to cooperate with the adjusting bolt 27. Rotating the adjusting bolt 27 moves the sliding clamp 21 towards the fixed clamp 22 until the arc-shaped hole tightly fits against the outer wall of the air intake pipe 8, achieving stable clamping of the air intake pipe 8 and preventing pipe wear during movement. Simultaneously, adjusting the clamping position allows for some play on both sides of the pipe, accommodating structural deformation during movement and extending pipe lifespan. The adjusting bolt 27 facilitates quick adjustment of clamping force, adapting to air intake pipes 8 of different diameters and improving structural versatility. Furthermore, the overall structure employs a detachable connection method. In addition to the aforementioned connection structure, the mounting bolts 28 and limiting bolts 24 of the connecting components are all detachable, facilitating component disassembly, maintenance, and replacement, reducing later maintenance costs. Preferably, the upper plate 6 and lower plate 4 are made of high-strength, lightweight aluminum alloy, balancing lightweight and rigidity requirements, suitable for the intensity requirements of children's daily activities, and extending the overall product lifespan. Based on this, the number of support nuts 18 and the thickness of the pad 17 can be adjusted according to actual usage needs to further optimize support stability and adapt to the usage needs of children of different weights.

[0028] A telescopic dust cover is fixedly installed at the opening of the strip hole 26. The dust cover is placed on the outside of the limiting block 29 to prevent impurities from entering the interior of the strip hole 26. Sealing rings are embedded at the mating points of the main rotating shaft 23 and the lower mounting base 25, and at the mating points of the auxiliary rotating shaft I 30 and the mounting block 33. The sealing rings are made of medical-grade silicone and have both sealing and dustproof functions as well as lubrication. At the same time, this device needs to be cleaned regularly and lubricated regularly to ensure smooth movement.

[0029] It is recommended to disassemble and clean the filter plate 16 of this device every 1-2 weeks. It is recommended to check the easily worn parts such as the sealing ring and compression spring 31 every 6 months. If aging, deformation or damage occurs, they should be replaced in time. The moving parts should be cleaned of impurities and coated with medical-grade grease regularly to avoid dry friction and wear. The tightness of each bolt and nut should be checked regularly to prevent loosening from affecting the safety of use. The above maintenance operations can extend the service life of the device.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lightweight, high-rigidity, shock-absorbing, energy-feedback type prosthetic footplate for children, characterized in that, include: The prosthesis receiving cavity (1) has an upper mounting base (3) detachably mounted at its bottom via a connecting assembly, and a main rotating shaft (23) is fixedly connected through the upper mounting base (3). The lower mounting base (25) has the main rotating shaft (23) rotatably passing through it. The lower mounting base (25) has a buffer assembly at the top and multiple limit bolts (24) threadedly connected at the bottom. The lower plate (4) and the upper plate (6) are provided. The upper plate (6) has multiple threaded mounting holes I (9) at one end. The limiting bolt (24) is threaded through the threaded mounting holes I (9) to lock the upper plate (6) and the lower mounting seat (25). Two symmetrical fixing bolts (7) are fixed on one side of the top of the lower plate (4). The upper plate (6) has multiple sets of threaded mounting holes II (10) that are staggered front and back. The fixing bolts (7) are threaded through the threaded mounting holes II (10) and are threaded with fixing nuts (11).

2. The prosthetic footplate according to claim 1, characterized in that, The connecting assembly includes an upper connecting seat (2) fixed to the bottom of the prosthesis receiving cavity (1) and a lower connecting seat (20) fixed to the top of the upper mounting seat (3). Both the upper connecting seat (2) and the lower connecting seat (20) are threaded with multiple mounting bolts (28). A threaded rod (19) is fixedly connected inside the lower connecting seat (20). The upper connecting seat (2) is threaded onto the top of the threaded rod (19). The threaded rod (19) has multiple support nuts (18) and washers (17) threaded on its outer wall. The support nuts (18) and washers (17) are sandwiched between the upper connecting seat (2) and the lower connecting seat (20). Rotating the support nuts (18) can adjust the distance between them.

3. The prosthetic footplate according to claim 1, characterized in that, The buffer assembly includes two symmetrically fixed auxiliary rotating shafts I (30) that pass through the lower mounting base (25). The outer wall of the upper mounting base (3) has two strip holes (26). A limiting block (29) slides through the strip hole (26). Mounting blocks (33) are rotatably sleeved on both the limiting block (29) and the outer wall of the auxiliary rotating shaft I (30). The two opposite mounting blocks (33) abut against the same compression spring (31).

4. The prosthetic footplate according to claim 3, characterized in that, Both ends of the compression spring (31) abut against the mounting block (33) through spring seats. The limiting block (29) and the outer wall of the auxiliary rotating shaft I (30) are threaded with limiting members. The limiting members abut against the outer walls of the upper mounting seat (3) and the lower mounting seat (25) to lock the position of the mounting block (33).

5. The prosthetic footplate according to claim 1, characterized in that, The bottom of the upper plate (6) is provided with an exhaust assembly, which includes an air bladder (5) fixedly installed at the bottom of the upper plate (6). Two connecting pipes (12) are fixedly installed on the side of the air bladder (5). A filter plate (16) is snapped into one end of the connecting pipe (12). A threaded sleeve (14) is threaded on the outer wall. A pressure ring (15) is fixedly installed on the inner wall of the threaded sleeve (14). The pressure ring (15) presses the filter plate (16) to achieve a limit. The connecting pipe (12) is equipped with a one-way valve inside. One of the threaded sleeves (14) is fixedly connected to the air inlet pipe (8). The other end of the air inlet pipe (8) is connected to the bottom of the prosthesis receiving cavity (1). When the upper plate (6) squeezes and rebounds the airbag (5), the one-way valve is used to extract the hot and humid exhaust gas.

6. The prosthetic footplate according to claim 5, characterized in that, The threaded sleeve (14) has an air outlet (13) at one end for discharging hot and humid exhaust gas from the airbag (5). The filter plate (16) can block impurities from entering the airbag (5) and the prosthesis receiving cavity (1).

7. The prosthetic footplate according to claim 5, characterized in that, The upper mounting base (3) has an elliptical hole on one side, a fixed clamping plate (22) is fixedly installed in the elliptical hole, and a sliding clamping plate (21) is slidably installed. The sliding clamping plate (21) and the fixed clamping plate (22) have arc-shaped holes on opposite sides for clamping the air intake pipe (8).

8. The prosthetic footplate according to claim 5, characterized in that, The upper mounting base (3) is rotatably provided with an adjusting bolt (27) on one side. The adjusting bolt (27) is threaded into the sliding clamp (21). Rotating the adjusting bolt (27) can drive the sliding clamp (21) to approach the fixed clamp (22).

9. The prosthetic footplate according to claim 7, characterized in that, The upper plate (6) and the lower plate (4) are made of high-strength lightweight aluminum alloy, and the air inlet pipe (8) is made of medical-grade soft plastic pipe.

Images