Passive wearable knee unloading device

Abstract

The application provides a passive wearable knee joint load reduction device, which comprises a left branch and a right branch, the left branch is mirror-symmetric with the right branch and is arranged on both sides of lower limbs of a user, each branch comprises a thigh assembly, a knee joint gear pair, a lower leg assembly, a support load reduction assembly and a monitoring assembly, the thigh assembly is engaged with the lower leg assembly through the knee joint gear pair, and the monitoring assembly is connected with the lower leg assembly through the support load reduction assembly, the knee joint gear pair in the application can simulate the change of the rotation center of the knee joint of the user, the tension spring of the support load reduction assembly can generate a thrust force in the direction of the lower leg, the support load reduction force is transmitted to the thigh through cooperation of various components in the knee joint gear pair, and the load of part of body weight acting on the knee joint is offset, so that the joint pain and cartilage wear of a user with knee osteoarthritis are reduced, and meanwhile, the monitoring assembly can monitor the knee joint load reduction force in real time, which is beneficial to treatment of knee osteoarthritis.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, and in particular to a passive wearable knee joint load reduction device. Background Technology

[0002] The knee joint is the largest weight-bearing joint for users, and it is also the joint that first and most frequently develops problems with age, especially among middle-aged and elderly people. Osteoarthritis of the knee has a high incidence rate. After developing the disease, users experience joint pain and limited mobility. If not treated effectively, it can easily develop into a disabling disease. The main cause of this disease is excessive pressure on the knee joint, which over time leads to wear and tear of the articular cartilage, contact and friction between the femoral condyle and tibial condyle, resulting in knee pain.

[0003] For early to mid-stage knee osteoarthritis, interventional treatments are clinically being explored using biomechanical correction to relieve joint pain, improve mobility, and prevent the condition from worsening. Current knee biomechanical correction products are primarily three-point orthotics. These products only reduce load on one side of the knee joint, while simultaneously increasing pressure on the other side, failing to effectively reduce load. Users also experience difficulty moving and stiffness after wearing them, and therefore, their use has not been widely adopted in practice. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a passive wearable knee joint load-reducing device. The knee joint gear pair can simulate the change in the rotation center of the user's knee joint, and the tension spring supporting the load-reducing component can generate a thrust along the direction of the lower leg. Through components such as the knee joint gear, the load-reducing force is transmitted to the thigh, offsetting part of the weight load on the knee joint, thereby reducing joint pain and cartilage wear in users with knee osteoarthritis. At the same time, the monitoring component can monitor the load-reducing force in real time, providing assistance for the treatment of knee osteoarthritis.

[0005] This invention provides a passive wearable knee joint load-reducing device, comprising a left branch and a right branch. The left branch and the right branch are mirror-symmetrical and positioned on both sides of the user's lower limb. Each branch includes a thigh assembly, a knee joint gear pair, a lower leg assembly, a support load-reducing assembly, and a monitoring assembly. The thigh assembly meshes with the lower leg assembly via the knee joint gear pair, and the monitoring assembly is connected to the lower leg assembly via the support load-reducing assembly. The knee joint gear pair includes a thigh rod, a lower leg rod, a gear cover plate, an outer washer, an inner washer, a bearing, a shaft, a gasket, and a bolt. The first end of the thigh rod passes through a groove at the bottom of the outer casing and is slidably connected to it. The thigh rod and the lower leg rod are locked together with bolts. The second end of the thigh rod and the first end of the lower leg rod are both incomplete gears, forming a meshing gear pair. The instantaneous center of the pair formed by the meshing of the two incomplete gears is the meshing point of the two gears, and the trajectory of the instantaneous center is arc-shaped, simulating the change in the rotation center of the knee joint. The gear cover plate, outer washer, and inner washer are sequentially arranged from the outside to the inside at the meshing point of the thigh rod and the lower leg rod. The rotating shaft passes sequentially through the gear cover plate, outer washer, inner washer, and gear pair hole. The rotating shaft is rotatably connected to the thigh rod or lower leg rod via bearings. The components in the knee joint gear pair are connected by washers and bolts. The support and load-reducing assembly includes a support... The system comprises a cover plate, tension springs, an outer force-adjusting plate, washers, a return spring, a pin, a spring hook, and an inner force-adjusting plate. The lower leg rod is located at the first end of the cover plate. The first end of the spring connecting plate passes through the gap between the cover plate and the lower leg rod, and the spring connecting plate is slidably connected to the cover plate. The spring connecting plate is connected to the outer force-adjusting plate and the inner force-adjusting plate respectively via tension springs. The tension springs are symmetrically arranged on both sides of the spring connecting plate. The first end of each tension spring is connected to the first end of the spring connecting plate, and the second end of each tension spring is connected to the spring hook. The washers include an outer washer and an inner washer. The first end face of the spring hook is connected to the outer force-adjusting plate via the outer washer. The second end face of the spring hook is connected to the inner force adjusting plate through an inner washer. The pin passes through the first through hole of the outer force adjusting plate, the slot of the support cover plate, the first series hole of the small leg rod, and the second through hole of the inner force adjusting plate from the outside to the inside. The step of the pin is engaged with the first series hole of the small leg rod, and the pin can slide up and down in the slot and the first series hole. The pin is used to adjust the initial length of the tension spring, thereby adjusting the load reduction support force range of the tension spring. The return spring is fitted on the end of the pin near the outer force adjusting plate. The first end of the return spring is fixedly connected to the step of the pin, and the second end of the return spring abuts against the outer force adjusting plate.The monitoring component includes a spring connecting plate, an L-shaped plate, an adjusting block, a stepped shaft, a knob, a pressure sensor, and a universal foot pad. The second end of the spring connecting plate is slidably connected to the L-shaped plate via the adjusting block. The stepped shaft passes through the third series hole of the L-shaped plate, the adjusting block, and the second series hole of the spring connecting plate from the outside to the inside. The stepped shaft has a step in its middle section and engages with the second and third series holes respectively. The knob is located at the end of the stepped shaft near the spring connecting plate. The first end of the pressure sensor is fixedly connected to the bottom end of the L-shaped plate. The universal foot pad is fixedly installed on the second end of the pressure sensor.

[0006] Preferably, the thigh assembly includes a shell, a thigh liner, and a thigh strap. The thigh liner is fixedly installed inside the shell, and the user's thigh is covered by the thigh liner. The shell has an outer slot at its side end, and the thigh strap passes through the outer slot. The shell of the left branch is connected to the shell of the right branch through the thigh strap.

[0007] Preferably, the calf assembly includes a calf binding plate, a connector, a calf strap, an inner lining plate, a calf liner, and a U-shaped plate. The calf binding plate is slidably connected to the inner side of the U-shaped plate via the connector. The outer side of the U-shaped plate is fixedly installed on the calf rod. The inner lining plate is fixedly connected to the calf binding plate. The calf strap passes through slots opened at both ends of the calf binding plate. The calf binding plate of the left branch is connected to the calf binding plate of the right branch via the calf strap.

[0008] Preferably, the outer shell is a semi-enclosed conical structure, and heat dissipation holes are also provided on the outer shell.

[0009] Preferably, one side of the meshing gear pair of the thigh rod and the calf rod is a right-angle structure. When the thigh rod and the calf rod rotate to a parallel position, the right-angle points of the thigh rod and the calf rod come into contact. The second end of the thigh rod has a bent offset design, so that the thigh rod and the gear cover plate have a certain offset distance, avoiding friction between the gear cover plate and the knee joint.

[0010] Preferably, the omnidirectional foot pad has a ball joint in the middle, allowing it to rotate in any direction. The bottom of the omnidirectional foot pad is a rubber pad. When the omnidirectional foot pad contacts the ground, the combined action of the ball joint and the rubber pad ensures that the contact position between the device and the ground does not change, and also ensures that the device always applies load-reducing support along the length of the lower leg.

[0011] Preferably, the gear cover, outer gasket, and inner gasket are all thin plate structures.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The present invention is a passive wearable knee joint load-reducing device. It is bound to the user's thigh and calf by straps on the thigh and calf components to form a wearable structure. When the user is in the gait support phase of walking, the support and load-reducing components generate a vertical upward support force to offset part of the weight acting on the knee joint, thereby reducing joint pain in users with knee osteoarthritis, reducing wear and tear on the articular cartilage, and providing assistance for the user's daily walking and disease treatment.

[0014] 2. The passive wearable knee joint load-reducing device of the present invention uses a knee joint gear pair that can simulate the change of the user's knee joint rotation center. Compared with a fixed-axis knee joint rotation pair, it has better wearing comfort. The sliding pair on the lower leg component can effectively prevent the load-reducing force from acting on the lower leg, thereby directly transmitting the load-reducing force to the thigh through the ground without affecting the lower leg. At the same time, the end of the device that contacts the ground is far away from the ankle joint, so it will not affect the flexible movement of the ankle joint.

[0015] 3. The support and load-reducing component in the passive wearable knee joint load-reducing device of the present invention uses a foot-contact spring that passively extends to provide load-reducing support. It exerts no impact on the user during support. The replacement of the tension spring and the adjustment of the initial length are simple and convenient. It is suitable for people with different load-reducing needs. Moreover, the thigh component, calf component and monitoring component can all be adjusted in length to adapt to users of different heights and weights. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure and wearing of the passive wearable knee joint load-reducing device of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the passive wearable knee joint load reduction device of the present invention;

[0018] Figure 3 This is a schematic diagram of the knee joint gear and lower leg assembly in this invention;

[0019] Figure 4 This is a schematic diagram of the structure of the load-reducing support component in this invention;

[0020] Figure 5 This is an exploded structural diagram of the load-reducing support component in this invention;

[0021] Figure 6 This is a schematic diagram of the monitoring component in this invention.

[0022] Key reference numerals:

[0023] Left branch LL, right branch LR, thigh assembly 1, outer shell 11, outer slot 111, heat dissipation hole 112, thigh liner 12, thigh strap 13, knee joint gear pair 2, thigh rod 21, lower leg rod 22, first tandem hole 221, gear cover plate 23, outer gasket 24, inner gasket 25, bearing 26, shaft 27, gasket 28, bolt 29, lower leg assembly 3, lower leg strap plate 31, connector 32, lower leg strap 33, inner liner plate 34, lower leg liner 35, U-shaped plate 36, support Load-reducing component 4, support cover plate 41, slot 411, tension spring 42, outer force-adjusting plate 43, first through hole 431, gasket group 44, first gasket group 441, second gasket group 442, return spring 45, pin shaft 46, spring hook 47, inner force-adjusting plate 48, second through hole 481, monitoring component 5, spring connecting plate 51, second series hole 512, L-shaped plate 52, third series hole 521, adjusting block 53, stepped shaft 54, knob 55, pressure sensor 56, universal foot pad 57. Detailed Implementation

[0024] To fully describe the technical content, structural features, objectives, and effects of this invention, a detailed description will be provided below in conjunction with the accompanying drawings.

[0025] The present invention relates to a passive wearable knee joint load-reducing device, such as... Figure 1 and Figure 2 As shown, it includes a left branch LL and a right branch LR. The left branch LL and the right branch LR are mirror-symmetrical and are located on both sides of the user. Each branch includes a thigh assembly 1, a knee joint gear pair 2, a calf assembly 3, a support and load-reducing assembly 4, and a monitoring assembly 5. The thigh assembly 1 is engaged with the calf assembly 3 through the knee joint gear pair 2. The monitoring assembly 5 is connected to the calf assembly 3 through the support and load-reducing assembly 4. The thigh assembly 1 includes a shell 11, a thigh liner 12, and a thigh strap 13. The thigh liner 12 is fixedly installed inside the shell 11, and the user's thigh is covered inside the thigh liner 12. The shell 11 has an outer slot 111 on its side, and the thigh strap 13 passes through the outer slot 111. The shell 11 of the left branch LL and the shell 11 of the right branch LR are connected by the thigh strap 13. The shell 11 has a semi-enclosed conical structure, and the shell 11 also has heat dissipation holes 112.

[0026] like Figure 3As shown, the knee joint gear pair 2 includes a thigh rod 21, a lower leg rod 22, a gear cover plate 23, an outer washer 24, an inner washer 25, a bearing 26, a rotating shaft 27, a washer 28, and a bolt 29. The first end of the thigh rod 21 passes through a groove at the bottom of the outer casing 11 and the two are slidably connected. The thigh rod 21 is locked and fixed to the outer casing 11 by bolts. The second end of the thigh rod 21 and the first end of the lower leg rod 22 are both incomplete gears, which together form a meshing gear rotating pair. The meshing of the two incomplete gears constitutes a... The instantaneous center of the rotating pair is the meshing point of the two gears. The trajectory of the instantaneous center is arc-shaped and can simulate the change of the rotation center of the knee joint. One side of the meshing gear pair of thigh rod 21 and calf rod 22 is a right-angle structure. When thigh rod 21 and calf rod 22 rotate to a parallel position, the right-angle points of thigh rod 21 and calf rod 22 come into contact. The second end of thigh rod 21 has a bent offset design, so that thigh rod 21 and gear cover plate 23 have a certain offset distance, avoiding friction between gear cover plate 23 and knee joint. Gear cover plate 23, outer washer 24 and inner washer 25 are arranged sequentially from the outside to the inside at the meshing point of thigh rod 21 and calf rod 21. Rotary shaft 27 is sequentially inserted through gear cover plate 23, outer washer 24, inner washer 25 and gear pair hole. Rotary shaft 27 is rotatably connected to thigh rod 21 or calf rod 22 through bearing 26. The components in knee joint gear pair 2 are connected by washer 28 and bolt 29. Gear cover plate 23, outer washer 24 and inner washer 25 are all thin plate structures.

[0027] like Figure 4 As shown, the calf assembly 3 includes a calf binding plate 31, a connector 32, a calf strap 33, an inner lining plate 34, a calf inner lining 35, and a U-shaped plate 36. The calf binding plate 31 is slidably connected to the inner side of the U-shaped plate 36 through the connector 32. The outer side of the U-shaped plate 36 is fixedly installed on the calf rod 22. The inner lining plate 34 is fixedly connected to the calf binding plate 31. The calf strap 33 is inserted into the slots opened at both ends of the calf binding plate 31. The calf binding plate 31 of the left branch LL and the calf binding plate 31 of the right branch LR are connected by the calf strap 33.

[0028] like Figure 5As shown, the support and load-reducing assembly 4 includes a support cover plate 41, a tension spring 42, an outer force-adjusting plate 43, a gasket assembly 44, a return spring 45, a pin 46, a spring hook 47, and an inner force-adjusting plate 48. The lower leg rod 22 is located at the first end of the support cover plate 41. The first end of the spring connecting plate 51 passes through the gap between the support cover plate 41 and the lower leg rod 22, and the spring connecting plate 51 is slidably connected to the support cover plate 41. The spring connecting plate 51 is connected to the outer force-adjusting plate 43 and the inner force-adjusting plate 48 respectively via the tension spring 42. The tension spring 42 is symmetrically arranged on both sides of the spring connecting plate 51. The first end of the tension spring 42 is connected to the first end of the spring connecting plate 51, and the second end of the tension spring 42 is connected to the spring hook 47. The gasket assembly 44 includes a first gasket assembly. 441 and the second washer group 442, the first end face of the spring hook 47 is connected to the outer force adjusting plate 43 through the first washer group 441, the second end face of the spring hook 47 is connected to the inner force adjusting plate 48 through the second washer group 442, the pin 46 is sequentially inserted from the outside to the inside into the first through hole 431 of the outer force adjusting plate 43, the slot 411 of the support cover plate 41, the first series hole 221 of the small leg rod 22 and the second through hole 481 of the inner force adjusting plate 48, the step of the pin 46 is engaged with the first series hole 221 of the small leg rod 22, and the pin 46 can slide up and down in the slot 411 and the first series hole 221. The pin 46 is used to adjust the initial length of the tension spring 42, thereby adjusting the range of load reduction support force provided by the tension spring 42. The return spring 45 is mounted on the end of the pin 46 near the outer force adjusting plate 43. The first end of the return spring 45 is fixedly connected to the step of the pin 46, and the second end of the return spring 45 abuts against the outer force adjusting plate 43.

[0029] like Figure 6 As shown, the monitoring component 5 includes a spring connecting plate 51, an L-shaped plate 52, an adjusting block 53, a stepped shaft 54, a knob 55, a pressure sensor 56, and a universal foot pad 57. The second end of the spring connecting plate 51 is slidably connected to the L-shaped plate 52 through the adjusting block 53. The stepped shaft 54 ​​passes through the third series hole 521 of the L-shaped plate 52, the adjusting block 53, and the second series hole 512 of the spring connecting plate 51 from the outside to the inside. The stepped shaft 54 ​​has a step in the middle and is engaged with the second series hole 512 and the third series hole 521 respectively. The knob 55 is located at one end of the stepped shaft 54 ​​near the spring connecting plate 51. The first end of the pressure sensor 56 is fixedly connected to the bottom end of the L-shaped plate 52. The universal foot pad 57 is fixedly installed on the second end of the pressure sensor 56. The center of the universal foot pad 57 is a ball joint, which allows the universal foot pad 57 to rotate in any direction. The bottom of the universal foot pad 57 is a rubber pad. When the universal foot pad 57 contacts the ground, the ball joint and the universal foot pad 57 work together to ensure that the contact position between the device and the ground does not change, and also to ensure that the device always applies load-reducing support force along the length of the lower leg.

[0030] The passive wearable knee joint load-reducing device of the present invention will be further described below with reference to embodiments:

[0031] This unloading device is strapped to the user, such as Figures 1-6 As shown, firstly, the thigh strap 13 and calf strap 33 are tied to the inner and outer sides of the user's lower limbs. When the user's knee joint flexes and extends, this load-reducing device moves parallel to the lower limb. When the lower limb is in a swinging state, the calf is suspended in the air, and the load-reducing component 4 and the monitoring component 5 are in their maximum length state, which is greater than the length of the user's calf. Then, when the user's foot is about to touch the ground, the universal foot pad 57 touches the ground first. When the foot touches the ground, the tension spring 42 is stretched under the action of the spring connecting plate 51, generating a vertical upward thrust. This thrust acts on the spring hook 47, is transmitted to the pin 46 through the outer force adjustment plate 43 and the inner force adjustment plate 48, and then to the knee joint gear pair 2 through the calf rod 22, and then upward to the outer shell 11 and the inner thigh liner 12, finally generating a vertical upward load-reducing thrust on the thigh. This load-reducing thrust is triggered by the device touching the ground, and the generated load-reducing force acts directly on the user's thigh through the device, without generating a vertical upward load-reducing force on the calf. As the device contacts the ground, the tension spring 42 is gradually stretched, resulting in a linear increase in the load-reducing force. Similarly, the load-reducing force decreases linearly as the device detaches from the ground. Therefore, the device does not exert any force on the user, ensuring safety. If the load-reducing force is mismatched, the initial length of the tension spring 42 can be adjusted manually by adjusting the position of the pin 46 in the first series hole 221, or a spring with a different elastic coefficient can be replaced. When the user's foot leaves the ground, the omnidirectional foot pad 57 leaves the ground later. The tension spring 42 begins to retract, and the spring connecting plate 51 begins to extend until it returns to its initial length when the user's leg is suspended in the air. Then, the next state cycle begins, repeating the above process.

[0032] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A passive wearable knee joint load-reducing device, characterized in that, It includes a left branch and a right branch, which are mirror images of each other and are located on both sides of the user's lower limb. Each branch includes a thigh assembly, a knee joint gear pair, a lower leg assembly, a support and load-bearing assembly, and a monitoring assembly. The thigh assembly engages with the lower leg assembly via the knee joint gear pair, and the monitoring assembly is connected to the lower leg assembly via the support and load-bearing assembly. The knee joint gear pair includes a thigh rod, a calf rod, a gear cover plate, an outer washer, an inner washer, a bearing, a shaft, washers, and bolts. The first end of the thigh rod passes through a groove at the bottom of the outer shell of the thigh assembly and is slidably connected to it. The thigh rod is locked to the outer shell by bolts. The second end of the thigh rod and the first end of the calf rod are both incomplete gears, forming a meshing gear pair. The instantaneous center of the pair formed by the meshing of the two incomplete gears is the meshing point of the two gears. The trajectory of the instantaneous center is arc-shaped and can simulate the change of the rotation center of the knee joint. The gear cover plate, outer washer, and inner washer are arranged sequentially from the outside to the inside at the meshing point of the thigh rod and the calf rod. The shaft passes sequentially through the gear cover plate, outer washer, inner washer, and meshing gear pair hole. The shaft is rotatably connected to the thigh rod or calf rod through a bearing. The components in the knee joint gear pair are connected sequentially by washers and bolts. The support and load-reducing assembly includes a support cover plate, a tension spring, an outer force-adjusting plate, a set of gaskets, a return spring, a pin, a spring hook, and an inner force-adjusting plate. The lower leg rod is located at the first end of the support cover plate. The first end of the spring connecting plate is inserted into the gap between the support cover plate and the lower leg rod, and the spring connecting plate is slidably connected to the support cover plate. The spring connecting plate is connected to the outer force-adjusting plate and the inner force-adjusting plate respectively through tension springs. The tension springs are symmetrically arranged on both sides of the spring connecting plate. The first end of the tension spring is connected to the first end of the spring connecting plate, and the second end of the tension spring is connected to the spring hook. The gasket set includes a first gasket set and a second gasket set. The first end face of the spring hook is connected to the first gasket set. The outer force adjustment plate is connected, and the second end face of the spring hook is connected to the inner force adjustment plate through the second washer group. The pin is sequentially inserted from the outside to the inside into the first through hole of the outer force adjustment plate, the slot of the support cover plate, the first series hole of the small leg rod, and the second through hole of the inner force adjustment plate. The step of the pin is engaged with the first series hole of the small leg rod, and the pin can slide up and down in the slot and the first series hole. The pin is used to adjust the initial length of the tension spring, thereby adjusting the range of load reduction support force provided by the tension spring. The return spring is fitted on the end of the pin near the outer force adjustment plate. The first end of the return spring is fixedly connected to the step of the pin, and the second end of the return spring abuts against the outer force adjustment plate. The monitoring component includes a spring connecting plate, an L-shaped plate, an adjusting block, a stepped shaft, a knob, a pressure sensor, and a universal foot pad. The second end of the spring connecting plate is slidably connected to the L-shaped plate via the adjusting block. The stepped shaft passes through the third series hole of the L-shaped plate, the adjusting block, and the second series hole of the spring connecting plate from the outside to the inside. The stepped shaft has a step in the middle and is engaged with the second series hole and the third series hole, respectively. The knob is located at the end of the stepped shaft near the spring connecting plate. The first end of the pressure sensor is fixedly connected to the bottom end of the L-shaped plate, and the universal foot pad is fixedly installed on the second end of the pressure sensor.

2. The passive wearable knee joint load-reducing device according to claim 1, characterized in that, The thigh assembly includes a shell, a thigh liner, and a thigh strap. The thigh liner is fixedly installed inside the shell, and the user's thigh is covered by the thigh liner. The shell has an outer slot at one side, and the thigh strap passes through the outer slot. The shell of the left branch is connected to the shell of the right branch through the thigh strap.

3. The passive wearable knee joint load-reducing device according to claim 1, characterized in that, The lower leg assembly includes a lower leg binding plate, a connector, a lower leg strap, an inner lining plate, a lower leg liner, and a U-shaped plate. The lower leg binding plate is slidably connected to the inner side of the U-shaped plate via the connector. The outer side of the U-shaped plate is fixedly installed on the lower leg bar. The inner lining plate is fixedly connected to the lower leg binding plate. The lower leg strap passes through slots opened at both ends of the lower leg binding plate. The lower leg binding plate of the left branch is connected to the lower leg binding plate of the right branch via the lower leg strap.

4. The passive wearable knee joint load-reducing device according to claim 2, characterized in that, The outer shell is a semi-enclosed conical structure, and heat dissipation holes are also provided on the outer shell.

5. The passive wearable knee joint load-reducing device according to claim 1, characterized in that, The rotating gear pair of the thigh bar and the calf bar has a right-angle structure on one side. When the thigh bar and the calf bar rotate to a parallel position, the right-angle points of the thigh bar and the calf bar come into contact. The second end of the thigh bar has a bent offset design, so that the thigh bar and the gear cover plate have a certain offset distance, avoiding friction between the gear cover plate and the knee joint.

6. The passive wearable knee joint load-reducing device according to claim 1, characterized in that, The universal foot pad has a ball joint in the middle, allowing it to rotate in any direction. The bottom of the universal foot pad is a rubber pad. When the universal foot pad contacts the ground, the ball joint and the rubber pad work together to ensure that the contact position between the device and the ground does not change, and also ensures that the device always applies load-reducing support along the length of the lower leg.

7. The passive wearable knee joint load-reducing device according to claim 1, characterized in that, The gear cover, outer gasket, and inner gasket are all thin plate structures.

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