Knee intelligent booster

Abstract

The application discloses a knee intelligent booster and relates to the technical field of knee boosting. The knee intelligent booster comprises a lower supporting rod, a joint booster is fixedly installed at the top of the lower supporting rod, a motor is arranged on the inner wall of the joint booster, an upper supporting rod is fixedly installed at the top of the joint booster, the upper supporting rod comprises a fixed rod, an adjusting plate is clamped on the side wall of the fixed rod, a positioning groove is formed in the side wall of the fixed rod, a fixed plate is fixedly installed on the inner wall of the positioning groove, a torsion ring is fixedly installed at the top of the fixed plate, and a screw rod is fixedly installed at the bottom driving end of the torsion ring. In the application, the flexible fitting and fixing are realized through the mechanical linkage structure driving air bags, the pressure is uniformly distributed, the problem that local over-tightening compression of blood vessels and nerves leads to numbness is avoided, the clamping stability is enhanced through elastic clamping strips when the air bags are inflated, the mechanical locking structure is combined, the equipment sliding displacement in the dynamic walking process is effectively prevented, and the boosting precision is improved.

Description

Technical Field

[0001] This invention relates to the field of knee assist technology, specifically to a smart knee assist device. Background Technology

[0002] With the increasing aging population and growing demand for rehabilitation medicine, smart knee assist devices, as wearable devices that can help people with lower limb dysfunction walk and reduce the exercise load of healthy people, have been widely developed and applied. Their core function is to provide precise assistance to the user's knee flexion and extension movements through the collaboration of the power module and the sensing and control module.

[0003] The smart knee assist device uses Velcro, buckles and other adjustable straps to fix the device in place on the thigh and calf. However, it can only adjust the tightness of the entire device and cannot be adapted to the user's leg circumference, leg muscle lines and bone protrusions. This can easily lead to problems such as the device being too tight or too loose in certain areas.

[0004] When wearing shorts in the summer, the legs are in direct contact with the straps, making them highly sensitive to pressure. When wearing trousers in the winter, the increased thickness of the clothing causes the straps to change length effectively, and traditional straps cannot be quickly adjusted to fit, which may cause the equipment to slip or increase pressure on the legs.

[0005] Some knee assist devices use airbag straps to improve fit, but the airbag inflation and deflation control lacks a linkage mechanical structure and mostly relies on an electric inflation device. This device is prone to failure due to circuit failure, battery depletion, etc. In rainy or humid outdoor environments, moisture intrusion can easily cause short circuits and damage to the electric components, affecting the airbag adjustment function and potentially posing safety hazards.

[0006] In view of the above, this application is hereby submitted. Summary of the Invention

[0007] The purpose of this invention is to provide a smart knee assist device to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention provides a smart knee assist device, including a lower support rod, a joint assist device fixedly installed on the top of the lower support rod, a motor provided on the inner wall of the joint assist device, and an upper support rod fixedly installed on the top of the joint assist device.

[0009] The upper support rod includes a fixed rod, an adjusting plate is snapped onto the side wall of the fixed rod, a positioning groove is formed on the side wall of the fixed rod, a fixed plate is fixedly installed on the inner wall of the positioning groove, a torsion ring is fixedly installed on the top of the fixed plate, a screw is fixedly installed on the bottom driving end of the torsion ring, a threaded block is threadedly connected to the outer wall of the screw, a retaining plate is fixedly installed on the side wall of the threaded block, an adjusting plate is snapped onto the inner wall of the retaining plate, and buckles are fixedly installed at both the upper and lower ends of the fixed rod perpendicular to the positioning groove, with the bends of the two buckles arranged in opposite directions. An upper fixing strap and a lower fixing strap are fixedly connected to the outer wall of the upper support rod.

[0010] Furthermore, the adjusting plate includes a retaining shaft that engages with the inner wall of the retaining plate. A rocker is slidably mounted on the side wall of the retaining shaft. Both ends of the rocker are provided with retaining rings. The upper end of the rocker is rotatably connected to one of the retaining rings, and the lower end of the rocker is slidably connected to the other retaining ring. A rotating ring is rotatably mounted on the top outer wall of the other retaining ring. A bolt is threadedly connected to the inner wall of the rotating ring, and the outer wall of the bolt is rotatably connected to the bottom of the rocker.

[0011] Furthermore, the upper and lower fixing straps have the same internal structure. The upper fixing strap includes piston chambers fixedly installed on both sides of the outer wall of the upper support rod. A strap is fixedly installed on the side of the piston chamber away from the upper support rod. Multiple airbags are fixedly installed on the inner side wall of the strap. Clips are fixedly installed on both sides of the multiple airbags. A sliding hole is opened on the side wall of the fixing rod. The sliding rod passes through the inner wall of the sliding hole and can slide along the inner wall of the sliding hole. The short rope passes through the inner wall of the fixing plate, and a ventilation hole is opened on the inner wall of the fixing plate. The multiple airbags are independently arranged and interconnected with each other. The airbags are connected to the inside of the piston chamber. The piston is slidably installed on the inner wall of the piston chamber.

[0012] Furthermore, the clamping strips are made of elastic material. When the airbag inflates, the clamping strips move closer together as the airbag expands, thereby clamping the wearer's clothing. A foot support plate is fixedly installed at the bottom of the lower support rod. A spring is fixedly installed on the side wall of the foot support plate. The top of the spring is fixedly connected to the bottom of the lower support rod, and the side wall abuts against the foot support plate. The spring is an arc-shaped elastic structure, and the curvature of the spring matches the curvature of the side wall of the foot support plate. The joint assist device is internally equipped with flexible material. The joint assist device has a built-in sensing system, which is electrically connected to the motor.

[0013] Furthermore, a sliding ring is slidably installed on the outer wall of the retaining ring, a pull ring is fixedly installed on the outer wall of the sliding ring, a sliding rod is fixedly installed on the top of the rocker plate on the side away from the retaining ring, and a short rope is fixedly connected to the other end of the sliding rod; a long rope is fixedly connected to the bottom of the short rope, pistons are fixedly connected to both ends of the short rope, two other long ropes are fixedly connected to the bottom of the long rope, a spring is fixedly connected to the side of the piston near the short rope, and a fixing plate is fixedly connected to the side end of the spring.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The airbag is driven by a mechanical linkage structure to achieve flexible fit and fixation, and the pressure is evenly distributed, avoiding the problem of numbness caused by excessive local compression of blood vessels and nerves. At the same time, when the airbag is inflated, the elastic clips enhance the clamping stability. Combined with the mechanical locking structure, it effectively prevents the equipment from sliding and shifting during dynamic walking, and improves the accuracy of assistance.

[0016] 2. The initial state of the airbag can be flexibly switched through mechanical adjustment. When wearing shorts in summer, it is first prepared with the maximum expansion degree, and then precisely contracted to the comfortable pressure to meet the sensitive needs of direct contact with the legs. When wearing trousers in winter, the airbag is first contracted to make it easy to put on, and then the airbag is expanded through mechanical linkage to clamp the clothes and use clips to hold and fix them, quickly adapting to changes in the thickness of the clothes.

[0017] 3. The position of the adjustment plate axis can be quickly adjusted by rotating the torsion ring, and the tilt angle of the rocker can be finely adjusted with the bolts to achieve precise adjustment of the airbag inflation. The operation is simple and convenient and requires no professional skills.

[0018] 4. The airbag inflation and deflation are achieved entirely through a mechanical linkage structure, eliminating the need for an additional manual inflation pump or electric inflation device. This structure avoids the risk of malfunctions such as short circuits in electric components and battery depletion, making it particularly suitable for complex environments such as outdoor rain and humidity, thus improving the reliability and safety of the equipment. Attached Figure Description

[0019] Figure 1 A schematic diagram of the front structure of a smart knee assist device;

[0020] Figure 2 This is an enlarged schematic diagram of the fixing mechanism of a smart knee assist device;

[0021] Figure 3 This is an enlarged schematic diagram of the adjustment plate structure of a smart knee assist device;

[0022] Figure 4 A magnified schematic diagram of the bottom structure of the adjustment plate of a smart knee assist device;

[0023] Figure 5 A schematic diagram of the enlarged locking structure of a smart knee assist device;

[0024] Figure 6 This is an enlarged schematic diagram of the fixing rod structure of a smart knee assist device;

[0025] Figure 7 This is an enlarged schematic diagram of the fixing strap structure of a smart knee assist device.

[0026] In the diagram: 1. Lower support rod; 2. Joint booster; 3. Motor; 4. Upper support rod; 41. Fixed rod; 411. Positioning groove; 412. Fixed plate; 413. Torsion ring; 414. Sliding hole; 415. Buckle ring; 416. Threaded block; 417. Clamping plate; 418. Screw; 42. Adjusting plate; 421. Rocker; 422. Clamping shaft; 423. Sliding rod; 424. Piston; 425. Short rope; 426. Long rope; 427. Sliding ring; 428. Clamping ring; 4281. Rotary ring; 429. Pulling ring; 420. Bolt; 5. Upper fixing strap; 51. Fixing plate; 52. Spring; 53. Piston chamber; 54. Strap; 55. Airbag; 551. Clip; 6. Foot support plate; 7. Spring piece; 8. Lower fixing strap. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 7This invention provides a technical solution: a smart knee assist device, including a lower support rod 1, a joint assist device 2 fixedly installed on the top of the lower support rod 1, a motor 3 disposed on the inner wall of the joint assist device 2, an upper support rod 4 fixedly installed on the top of the joint assist device 2, a foot support plate 6 fixedly installed on the bottom of the lower support rod 1, a spring piece 7 fixedly installed on the rear side wall of the foot support plate 6, the top of the spring piece 7 being fixedly connected to the bottom of the lower support rod 1 and the front side wall abutting against the foot support plate 6; the upper support rod 4 includes a fixing rod 41, an adjusting plate 42 being snapped into the side wall of the fixing rod 41, and connected by a torsion ring 413, a screw 418, and a thread. The mechanical transmission chain of block 416 and clamping plate 417 enables precise adjustment of the axis position of adjusting plate 42, providing a core mechanical foundation for subsequent airbag 55 adaptation and adjustment. A positioning groove 411 is provided on the side wall of fixing rod 41. A fixing plate 412 is fixedly installed on the inner wall of the positioning groove 411. A torsion ring 413 is fixedly installed on the top of fixing plate 412. A screw 418 is fixedly installed on the bottom drive end of torsion ring 413. A threaded block 416 is threadedly connected to the outer wall of screw 418. A clamping plate 417 is fixedly installed on the side wall of threaded block 416. The adjusting plate 42 is clamped onto the inner wall of clamping plate 417. The fixing rod 41 moves up and down... Both ends are fixedly installed with buckles 415 perpendicular to the positioning groove 411, and the two buckles 415 are arranged with opposite bends; the upper support rod 4 has an upper fixing strap 5 and a lower fixing strap 8 fixedly connected to its outer wall. The upper fixing strap 5 and the lower fixing strap 8 have the same internal structure and can be mechanically adjusted to adapt to different wearing thicknesses. They can meet the comfortable fit requirements when wearing shorts in summer and the clothing clamping and fixing requirements when wearing outer trousers in winter. The upper fixing strap 5 includes piston chambers 53 fixedly installed on both sides of the outer wall of the upper support rod 4. A strap 54 is fixedly installed on the side of the piston chamber 53 away from the upper support rod 4. The inner wall of the strap 54 is fixedly Multiple airbags 55 are fixedly installed, and clips 551 are fixedly installed on both sides of the multiple airbags 55, forming a composite fixing structure of piston chamber 53, airbags 55, and clips 551. This replaces the traditional Velcro, combining the flexible fitting characteristics of the airbags 55 with the precision of mechanical adjustment. At the same time, the clips 551 supplement the clamping stability, forming a dual fixing logic of flexible fitting and rigid limiting. All core adjustments are achieved through the above-mentioned mechanical structure, without the need for additional electric devices or manual air pumps. Users only need to rotate the torsion ring 413 and snap the adjustment plate 42 to complete the adaptation, making the operation threshold low.

[0029] Please see Figures 1 to 7This invention provides a technical solution: a smart knee assist device, including an adjustment plate 42 including a locking shaft 422 that engages with the inner wall of a locking plate 417. Through the engagement of the locking shaft 422 with the locking plate 417, the adjustment plate 42 and the fixed rod 41 can be detachably connected. A rocker plate 421 is slidably installed on the side wall of the locking shaft 422. Both ends of the rocker plate 421 are provided with locking rings 428. The upper end of the rocker plate 421 is rotatably connected to one of the locking rings 428, and the lower end of the rocker plate 421 is slidably connected to the other locking ring 428, ensuring that the subsequent sliding rod 423 and other components can be smoothly driven during the adjustment process. A rotating ring 4281 is rotatably installed on the top outer wall of the other locking ring 428. A bolt 420 is threadedly connected to the inner wall of the rotating ring 4281. The outer wall of the bolt 420 is rotatably connected to the bottom of the rocker plate 421. By rotating the rotating ring 4281 to drive the bolt 420 to rotate, the tilt angle of the rocker plate 421 can be finely adjusted, thereby realizing the fine adjustment of the inflation degree of the airbag 55.

[0030] Please see Figures 1 to 7 This invention provides a technical solution: a smart knee assist device, comprising a sliding ring 427 slidably mounted on the outer wall of a retaining ring 428, and a pull ring 429 fixedly mounted on the outer wall of the sliding ring 427. By pulling the pull ring 429, the sliding ring 427 can be slid, which can quickly lock and unlock the retaining ring 428 and the buckle 415 on the fixed rod 41, which is convenient to operate and securely locked; a sliding rod 423 is fixedly mounted on the top of the side of the rocker plate 421 away from the retaining ring 428, and a short rope 425 is fixedly connected to the other end of the sliding rod 423, and a long rope 426 is fixedly connected to the bottom of the short rope 425. Both ends of the short rope 425 are fixedly connected to pistons 424, which can transmit the mechanical movement of the adjusting plate 42 to the pistons 424, realize the stable regulation of the air pressure in the piston chamber 53, and thus control the expansion and contraction of the airbag 55. Two other long ropes 426 are fixedly connected to the bottom of the long rope 426. A spring 52 is fixedly connected to the side of the piston 424 near the short rope 425. A fixing plate 51 is fixedly connected to the side of the spring 52. The spring 52 can realize the automatic reset of the piston 424, which facilitates the rapid relaxation of the airbag 55 when the equipment is detached. The fixing plate 51 provides guidance and limit for the short rope 425.

[0031] Please see Figures 1 to 7 The present invention provides a technical solution: a smart knee assist device, including a sliding hole 414 on the side wall of a fixed rod 41, a sliding rod 423 passing through the inner wall of the sliding hole 414, and the sliding rod 423 can slide along the inner wall of the sliding hole 414. The design of the sliding hole 414 provides precise sliding guidance for the sliding rod 423, restricts the movement trajectory of the sliding rod 423, and ensures that the sliding rod 423 can smoothly drive the short rope 425 to move when sliding. The short rope 425 passes through a fixed piece 51, and the fixed piece 51 has a ventilation hole, which provides a channel for the short rope 425 to pass through and allows the auxiliary airbag 55 to be inflated and deflated.

[0032] Please see Figures 1 to 7 The present invention provides a technical solution: a smart knee assist device, comprising multiple airbags 55 independently arranged and interconnected, and the airbags 55 are connected to the interior of the piston chamber 53. The piston 424 is slidably installed on the inner wall of the piston chamber 53. This communication relationship between the airbags 55 and the piston chamber 53 and the sliding cooperation relationship between the piston 424 and the piston chamber 53 ensures that the sliding of the piston 424 can directly and efficiently change the air pressure inside the airbags 55, realize precise control of the expansion and contraction of the airbags 55, and avoid leakage or loss in the process of air pressure transmission.

[0033] Please see Figures 1 to 7 The present invention provides a technical solution: a smart knee assist device, including clips 551 made of elastic material. When the airbag 55 inflates, the clips 551 move closer to each other as the airbag 55 inflates, thereby clamping the wearer's clothing, effectively solving the problem of the device being unstable due to clothing slippage when wearing outer pants in winter; when the airbag 55 contracts, the clips 551 separate from each other, without affecting wearing and taking off.

[0034] Please see Figures 1 to 7 The present invention provides a technical solution: a smart knee assist device, including a spring piece 7 with an arc-shaped elastic structure. The arc of the spring piece 7 is adapted to the arc of the side wall of the foot support plate 6. The elastic deformation capability brought by its arc-shaped elastic structure can effectively buffer the impact force of the ground on the foot during walking, reduce the transmission of impact force to the knee joint, reduce the burden on the knee joint, and is especially suitable for rehabilitation patients with weak joint function and the elderly, thereby enhancing the rehabilitation assistance value of the device.

[0035] Please see Figures 1 to 7 This invention provides a technical solution: a smart knee assist device, including a joint assist device 2 with a flexible material inside. This flexible material can reduce the hard friction and collision between the assist device and the knee joint, reduce wearing discomfort, improve the comfort and safety of long-term wear, and expand the applicable population of the device. At the same time, the joint assist device 2 has a built-in sensing system, which is electrically connected to a motor 3. It can sense the human body's movement intention in real time and control the rotation direction, amplitude, and force of the motor 3, so as to achieve precise control of the rotation direction, amplitude, and force of the motor 3, making the assist action highly consistent with the human body's natural gait, and improving the assist effect and gait coordination.

[0036] It should be noted that the sensing system can adopt the sensing and control system and method of the lower limb joint assistive exoskeleton system disclosed in CN112192570A. It adopts a scheme of sensing gait phase and foot pressure correction by joint drive encoder, which simplifies the sensor configuration, improves the reliability and speed of the sensing system, and does not affect the wearability of other devices. It adopts a support-related joint angle position control mode to provide active assist support, and a swing phase torque servo control mode to improve the compliance between human and machine. Compared with the traditional full gait cycle control method, this independent control mode under different gait phases can not only achieve active assistance, but also improve the following performance between human and machine, thereby improving wearing comfort.

[0037] Working principle: During the fitting process, the torsion ring 413 in the positioning groove 411 of the fixing rod 41 is manually rotated to drive the screw 418 to rotate and drive the threaded block 416 and the clamping plate 417 to slide, thereby adjusting the axial position of the adjusting plate 42. Basic fitting preparation can be completed without relying on electric devices. In response to the high sensitivity of the legs to the fitting pressure when wearing shorts in summer, the spring 52 is naturally extended in the initial state to maximize the air pressure in the piston chamber 53, and the airbag 55 is in the pre-fixed state of maximum expansion. After the leg is inserted into the upper fixing strap 5 and the lower fixing strap 8, the rocker arm 421 of the adjusting plate 42 drives the sliding rod 423 to slide along the sliding hole 414 of the fixing rod 41. This, in conjunction with the short rope 425 and the long rope 426, pulls the piston 424 to move in the piston chamber 53, extracting some air and causing the airbag 55 to contract to a comfortable pressure that fits the leg. In response to the difficulty of fixing and fitting when wearing outer pants in winter due to the increased thickness of clothing, the process is as follows: The aforementioned mechanical linkage structure contracts the airbag 55 to its minimum state for easy wear. Then, the reverse adjustment causes the piston 424 to push gas into the airbag 55. During the inflation of the airbag 55, the elastic clips 551 on both sides move closer to each other, forming a stable clamp on the outer pants. The entire adjustment process of the airbag 55 is achieved through mechanical linkage, without the need for an additional manual air pump or electric air inflation device. The structure has strong linkage and is highly adaptable. After the wearer is fixed, the sensing system built into the joint assist device 2 captures the human body's movement intention in real time and transmits the signal to the motor 3. The motor 3 drives the joint assist device 2 to assist the knee joint movement with an appropriate rotation direction, amplitude, and force, achieving precise assistance. At the same time, the arc-shaped spring 7 on the side wall of the foot support plate 6 cushions the impact force of the ground during walking through elastic deformation, further improving wearing comfort. When removing the airbag, simply reverse the operation to unlock the engagement between the adjustment plate 42 and the fixing rod 41. The spring 52 resets and causes the airbag 55 to relax, making it easy to remove the airbag.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A smart knee assist device, comprising a lower support rod (1), characterized in that: The lower support rod (1) is fixedly installed with a joint booster (2), the inner wall of the joint booster (2) is provided with a motor (3), and the upper support rod (4) is fixedly installed on the top of the joint booster (2). The upper support rod (4) includes a fixed rod (41), an adjusting plate (42) is snapped onto the side wall of the fixed rod (41), a positioning groove (411) is provided on the side wall of the fixed rod (41), a fixed plate (412) is fixedly installed on the inner wall of the positioning groove (411), a torsion ring (413) is fixedly installed on the top of the fixed plate (412), a screw (418) is fixedly installed on the bottom driving end of the torsion ring (413), a threaded block (416) is threadedly connected to the outer wall of the screw (418), a retaining plate (417) is fixedly installed on the side wall of the threaded block (416), an adjusting plate (42) is snapped onto the inner wall of the retaining plate (417), and a retaining ring (415) is fixedly installed at both the upper and lower ends of the fixed rod (41) perpendicular to the positioning groove (411). The two retaining rings (415) are arranged with opposite bends. An upper fixing strap (5) and a lower fixing strap (8) are fixedly connected to the outer wall of the upper support rod (4).

2. The intelligent knee assist device as described in claim 1, characterized in that: The upper fixing strap (5) and the lower fixing strap (8) have the same internal structure. The upper fixing strap (5) includes a piston chamber (53) fixedly installed on both sides of the outer wall of the upper support rod (4). A strap (54) is fixedly installed on the side of the piston chamber (53) away from the upper support rod (4). Multiple airbags (55) are fixedly installed on the inner side wall of the strap (54). Clips (551) are fixedly installed on both sides of the multiple airbags (55).

3. The intelligent knee assist device as described in claim 2, characterized in that: The adjusting plate (42) includes a retaining shaft (422) that engages with the inner wall of the retaining plate (417). A rocker plate (421) is slidably mounted on the side wall of the retaining shaft (422). Both ends of the rocker plate (421) are provided with retaining rings (428). The upper end of the rocker plate (421) is rotatably connected to one of the retaining rings (428), and the lower end of the rocker plate (421) is slidably connected to the other retaining ring (428). A rotating ring (4281) is rotatably mounted on the top outer wall of the other retaining ring (4281). A bolt (420) is threadedly connected to the inner wall of the rotating ring (4281), and the outer wall of the bolt (420) is rotatably connected to the bottom of the rocker plate (421).

4. The intelligent knee assist device as described in claim 3, characterized in that: A sliding ring (427) is slidably installed on the outer wall of the retaining ring (428), and a pull ring (429) is fixedly installed on the outer wall of the sliding ring (427). A sliding rod (423) is fixedly installed on the top of the rocker (421) away from the retaining ring (428), and a short rope (425) is fixedly connected to the other end of the sliding rod (423). A long rope (426) is fixedly connected to the bottom of the short rope (425), and pistons (424) are fixedly connected to both ends of the short rope (425). Two other long ropes (426) are fixedly connected to the bottom of the long rope (426). A spring (52) is connected to the side of the piston (424) near the short rope (425), and a fixing plate (51) is fixedly connected to the side end of the spring (52).

5. The intelligent knee assist device as described in claim 4, characterized in that: The side wall of the fixed rod (41) is provided with a sliding hole (414), the sliding rod (423) is slidably inserted in the sliding hole (414), the short rope (425) passes through the fixed piece (51), and the fixed piece (51) is provided with a ventilation hole.

6. The intelligent knee assist device as described in claim 5, characterized in that: Multiple airbags (55) are independently arranged and interconnected, and the airbags (55) are connected to the interior of the piston chamber (53), and the piston (424) is slidably installed on the inner wall of the piston chamber (53).

7. A smart knee assist device as described in claim 6, characterized in that: The clips (551) are made of elastic material. When the airbag (55) inflates, the clips (551) move closer to each other as the airbag (55) inflates, thereby clamping the wearer's clothing.

8. The intelligent knee assist device as described in claim 7, characterized in that: The lower support rod (1) is fixedly installed with a foot support plate (6) at its bottom. A spring piece (7) is fixedly installed on the rear side wall of the foot support plate (6). The top of the spring piece (7) is fixedly connected to the bottom of the lower support rod (1) and the front side wall abuts against the foot support plate (6). The spring piece (7) is an arc-shaped elastic structure. The arc of the spring piece (7) is adapted to the arc of the side wall of the foot support plate (6).

9. A smart knee assist device as described in claim 8, characterized in that: The joint booster (2) is equipped with a flexible material inside, and the joint booster (2) has a built-in sensing system that is electrically connected to the motor (3).

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