A lower limb knee joint energy absorption device

Abstract

The present application provides a lower limb knee joint energy absorption device, which belongs to the technical field of flight backpacks. Specifically, it includes a thigh fixing component, a calf fixing component, a flexible shock-absorbing structure inner layer and a flexible shock-absorbing structure outer layer. The flexible shock-absorbing structure inner layer is arranged corresponding to the knee, and the flexible shock-absorbing structure outer layer is arranged on the side of the flexible shock-absorbing structure inner layer facing away from the knee; the calf fixing component is connected to a first fixed point on the flexible shock-absorbing structure inner layer on either the inner side or the outer side of the knee, and the thigh fixing component is connected to a second fixed point on the flexible shock-absorbing structure outer layer on the other side of the knee. The flexible shock-absorbing structure inner layer and the flexible shock-absorbing structure outer layer are connected by elastic bands arranged at intervals; when the knee joint is bent, the thigh fixing component and the calf fixing component drive the first fixed point and the second fixed point away, and the flexible shock-absorbing structure inner layer covers and adheres to the knee. Through the processing scheme of the present application, the damage to the lower limb knee is reduced when using a flight backpack.

Description

Technical Field

[0001] The present application relates to the field of flight backpacks, and more particularly to an energy-absorbing device for the user's lower limb knee joints during takeoff and landing. Background Art

[0002] As a single-person flying device, the flight backpack has the characteristics of strong maneuverability, small size, fast flight speed, and quick response. It can be widely used in individuals and the military, and is also an ideal tool for fire departments or emergency rescue.

[0003] Therefore, the use of the jetpack user itself needs to be paid attention to. In particular, there is currently little attention paid to the lower limbs of the jetpack user, let alone the important joints. Due to the heavy weight of the jetpack, there is a certain impact on the knees during takeoff and landing. Summary of the Invention

[0004] In view of this, the present application provides a lower limb knee joint energy absorption device, which solves the problems in the prior art and reduces the damage to the lower limb knee caused by impact when using a flying backpack for takeoff and landing.

[0005] The present application provides a lower limb knee joint energy absorption device that adopts the following technical solutions:

[0006] A lower limb knee joint energy absorption device, comprising a thigh fixing assembly for fixing to the thigh, a calf fixing assembly for fixing to the calf, a flexible shock-absorbing structure inner layer, and a flexible shock-absorbing structure outer layer, wherein the flexible shock-absorbing structure inner layer is arranged corresponding to the knee, and the flexible shock-absorbing structure outer layer is arranged on the side of the flexible shock-absorbing structure inner layer facing away from the knee;

[0007] The calf fixing assembly is connected to a first fixing point on the inner layer of the flexible shock-absorbing structure on either the inner or outer side of the knee, and the thigh fixing assembly is connected to a second fixing point on the outer layer of the flexible shock-absorbing structure on the other side of the knee. The inner layer and the outer layer of the flexible shock-absorbing structure are connected by elastic bands arranged at intervals.

[0008] When the knee joint is straightened, the inner layer of the flexible shock-absorbing structure and the outer layer of the flexible shock-absorbing structure are close to each other. When the knee joint is bent, the thigh fixing assembly and the calf fixing assembly drive the first fixing point and the second fixing point to move away from each other, and the inner layer of the flexible shock-absorbing structure covers and is close to the knee.

[0009] Optionally, the thigh fixing assembly and the calf fixing assembly both include oppositely arranged fixing rods and straps surrounding the fixing rods, and the straps bind the opposite fixing rods and respectively adhere them to the inner side or outer side of the legs.

[0010] Optionally, the top end of the fixing rod of the calf fixing assembly close to either the outer side or the inner side of the leg is connected to an inner connecting rod, and the bottom end of the fixing rod of the thigh fixing assembly close to the other side of the leg is connected to an outer connecting rod;

[0011] One end of the inner connecting rod is rotatably connected to the fixed rod, and the other end is connected to the inner layer of the flexible shock-absorbing structure. One end of the outer connecting rod is rotatably connected to the fixed rod, and the other end is connected to the outer layer of the flexible shock-absorbing structure.

[0012] Optionally, the inner connecting rod is provided with an inner arc rod bent toward the calf side at the end away from the fixed rod, and one end of the inner arc rod is connected to the inner layer of the flexible shock-absorbing structure; the outer connecting rod is provided with an outer arc rod bent toward the thigh side at the end away from the fixed rod, and one end of the outer arc rod is connected to the outer layer of the flexible shock-absorbing structure.

[0013] Optionally, the elastic bands between the inner layer of the flexible shock-absorbing structure and the outer layer of the flexible shock-absorbing structure are distributed at intervals along the direction from the first fixing point to the second fixing point.

[0014] Optionally, a through groove is formed after a U-shaped cutting line is formed on the outer layer of the flexible shock-absorbing structure, and the through groove extends in the direction from the first fixed point to the second fixed point. The partially peeled structure forms the elastic band, and when the outer layer of the flexible shock-absorbing structure and the inner layer of the flexible shock-absorbing structure are close to each other, the elastic band is distributed along the length direction of the through groove.

[0015] Optionally, the lower limb knee joint energy absorption device also includes a knee joint connecting rod structure, the knee joint connecting rod structure includes a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected to the bottom end of the fixed rod of the thigh fixing assembly, the first connecting rod is provided with a sliding groove arranged along the length direction, one end of the second connecting rod is rotatably connected to the top end of the fixed rod of the calf fixing assembly, and the other end is provided with a slider sliding in the sliding groove.

[0016] In summary, this application has the following beneficial technical effects:

[0017] During the takeoff preparation phase, when the knee joint bends, the thigh fixing assembly and the calf fixing assembly stretch the inner and outer layers of the flexible shock-absorbing structure, giving the inner layer of the flexible shock-absorbing structure a contractile elastic force. The tension on the thigh and calf is then transmitted through the thigh fixing assembly and the calf fixing assembly, sharing the support and tension of the knee joint on the thigh and calf, and assisting the knee in bending. During the landing phase, the user needs to bend the knee joint to absorb the impact when landing. At the moment of landing, the user's own weight and the gravity of the upper body flight bag are applied to the knee joint. Therefore, when the knee joint is bent and impacted, the knee joint has a tendency to bend further. In order to stabilize the body shape, the knee joint needs to balance the degree of bending. At this time, the knee joint needs to bear a greater load. In this application, when the knee joint needs to bend further, the inner layer of the flexible shock-absorbing structure needs to be further stretched. The process of stretching the inner layer of the flexible shock-absorbing structure absorbs part of the impact force, thereby reducing the load on the knee joint in the process of balancing the degree of bending and alleviating the pressure on the knee joint.

[0018] The energy required for movement between the first and second connecting rods during knee flexion also dissipates kinetic energy originally applied to the knee joint, further absorbing energy. Simultaneously, the maximum displacement of the first and second connecting rods limits the relative distance between the thigh and calf, restricting the normal range of motion of the thigh and calf. This reduces the load on the knee joint itself, alleviating pressure on the knee joint and alleviating stress on the user's knee joint, thereby protecting the user's knee joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the lower limb knee joint energy absorption device of the present application when it is straightened;

[0021] Figure 2 This is a schematic structural diagram of the lower limb knee joint energy absorption device of the present application when it is straightened from another perspective;

[0022] Figure 3 This is a schematic diagram of the structure of the lower limb knee joint energy absorption device of this application when it is bent;

[0023] Figure 4 This is a structural schematic diagram of the lower limb knee joint energy absorption device of this application from another perspective when it is bent.

[0024] Explanation of the accompanying drawings: 1. Thigh fixing assembly; 11. Outer connecting rod; 12. Outer arc rod; 13. Fixing rod; 14. Strap; 2. Calf fixing assembly; 21. Inner connecting rod; 22. Inner arc rod; 3. Inner layer of flexible shock-absorbing structure; 31. First fixing point; 4. Outer layer of flexible shock-absorbing structure; 41. Second fixing point; 5. Knee joint connecting rod structure; 51. First connecting rod; 52. Second connecting rod; 53. Slide groove; 54. Slider; 6. Elastic band; 61. Through groove. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0026] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0027] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0028] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0029] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0030] An embodiment of the present application provides a lower limb knee joint energy absorption device.

[0031] like Figures 1-4 As shown, a lower limb knee joint energy absorption device includes a thigh fixation assembly 1 for fixation to the thigh, a calf fixation assembly 2 for fixation to the calf, a flexible shock-absorbing structure inner layer 3, and a flexible shock-absorbing structure outer layer 4. The flexible shock-absorbing structure inner layer 3 is positioned corresponding to the knee, and the flexible shock-absorbing structure outer layer 4 is positioned on the side of the flexible shock-absorbing structure inner layer 3 facing away from the knee. The flexible shock-absorbing structure outer layer 4 is positioned on top of the flexible shock-absorbing structure inner layer 3 to form a double-layer structure.

[0032] The calf anchor assembly 2 is connected to a first anchor point 31 on the inner layer 3 of the flexible shock-absorbing structure on either the inner or outer side of the knee. The thigh anchor assembly 1 is connected to a second anchor point 41 on the outer layer 4 of the flexible shock-absorbing structure on the other side of the knee. The inner layer 3 and the outer layer 4 of the flexible shock-absorbing structure are connected by elastic bands 6 arranged at intervals. The outer layer 4 of the flexible shock-absorbing structure is linked by the elastic bands 6, increasing the distance between the inner and outer layers, forming a double-layer energy-absorbing structure.

[0033] In one embodiment, when the knee joint energy absorption device is installed on the leg, the calf fixing component 2 on either side of the leg is connected to the first fixing point 31 on the inner layer 3 of the flexible shock-absorbing structure on the outside of the knee (the outside of the leg); the thigh fixing component 1 on either side of the leg is connected to the second fixing point 41 on the outer layer 4 of the flexible shock-absorbing structure on the inside of the knee (the inside of the leg).

[0034] In another embodiment, when the knee joint energy absorption device is installed on the leg, the calf fixing component 2 on either side of the leg is connected to the first fixing point 31 on the inner layer 3 of the flexible shock-absorbing structure on the inner side of the knee (inner side of the leg); the thigh fixing component 1 on either side of the leg is connected to the second fixing point 41 on the outer layer 4 of the flexible shock-absorbing structure on the outer side of the knee (outer side of the leg).

[0035] In the following content, the calf fixing component 2 on either side of the leg is connected to the first fixing point 31 on the inner layer 3 of the flexible shock-absorbing structure on the outside of the knee (the outside of the leg); and the thigh fixing component 1 on either side of the leg is connected to the second fixing point 41 on the outer layer 4 of the flexible shock-absorbing structure on the inside of the knee (the inside of the leg) as an example for explanation.

[0036] When the knee joint is straightened, the flexible shock-absorbing structure inner layer 3 and the flexible shock-absorbing structure outer layer 4 are close to each other. When the knee joint is bent, the thigh fixing component 1 pulls the flexible shock-absorbing structure outer layer 4 on one side of the leg, and the calf fixing component 2 pulls the flexible shock-absorbing structure inner layer 3 on the other side of the leg. The flexible shock-absorbing structure inner layer 3 and the flexible shock-absorbing structure outer layer 4 interact with each other through the elastic belt 6, so that the thigh fixing component 1 and the calf fixing component 2 drive the first fixed point 31 and the second fixed point 41 away, and at the same time, the flexible shock-absorbing structure inner layer 3 covers and fits tightly to the knee.

[0037] During takeoff preparation, when the knee joint bends, the thigh fixing assembly 1 and the calf fixing assembly 2 stretch the inner and outer layers of the flexible shock-absorbing structure, giving the inner layer 3 of the flexible shock-absorbing structure a contractile elastic force. The tension on the thigh and calf is then transmitted through the thigh fixing assembly 1 and the calf fixing assembly 2, sharing the support and tension of the knee joint on the thigh and calf, providing assistance to the knee during bending, thereby reducing the force on the user's knee joint and reducing the pressure on the knee joint, thereby protecting the user's knee joint. During landing, the user needs to bend the knee joint to prepare for landing. During landing, the gravity of the ground and the upper body flight bag exerts on the knee joint. When the knee joint is bent and impacted, the knee joint has a tendency to bend further. In order to stabilize the body shape, the knee joint needs to balance the degree of bending. At this time, the knee joint needs to bear a large amount of force. In this application, when the knee joint needs to bend further, the inner layer 3 of the flexible shock-absorbing structure needs to be further stretched. The process of stretching the inner layer 3 of the flexible shock-absorbing structure absorbs part of the impact force, thereby reducing the load on the knee joint during the process of balancing the degree of bending and reducing the pressure on the knee joint.

[0038] Specifically, the thigh fixing assembly 1 and the calf fixing assembly 2 each include oppositely disposed fixing rods 13 and straps 14 surrounding the fixing rods 13 . The straps 14 bind the opposite fixing rods 13 and adhere them to the inner side or outer side of the legs, respectively.

[0039] The top end of the fixing rod 13 of the calf fixing assembly 2 on either the outer or inner side of the leg is connected to the inner connecting rod 21, and the bottom end of the fixing rod 13 of the thigh fixing assembly 1 on the other side of the leg is connected to the outer connecting rod 11.

[0040] In one embodiment, the top end of the fixing rod 13 of the calf fixing assembly 2 close to the outside of the leg is connected to the inner connecting rod 21, and the bottom end of the fixing rod 13 of the thigh fixing assembly 1 close to the inside of the leg is connected to the outer connecting rod 11.

[0041] One end of the inner layer connecting rod 21 is rotatably connected to the fixing rod 13, and the other end is connected to a first fixing point 31 on the inner layer 3 of the flexible shock-absorbing structure. One end of the outer layer connecting rod 11 is rotatably connected to the fixing rod 13, and the other end is connected to a second fixing point 41 on the outer layer 4 of the flexible shock-absorbing structure. The rotation of the inner layer connecting rod 21 and the fixing rod 13, and the rotation of the outer layer connecting rod 11 and the fixing rod 13, causes the inner layer 3 and the outer layer 4 of the flexible shock-absorbing structure to have a certain degree of mobility relative to the thigh fixing assembly 1 and the calf fixing assembly 2 when the knee joint is bent, allowing the inner layer 3 of the flexible shock-absorbing structure to better fit the knee and better share the load on the knee joint.

[0042] The inner connecting rod 21 has an inner curved rod 22 at its end away from the fixed rod 13, which curves toward the calf. One end of the inner curved rod 22 is connected to the inner layer 3 of the flexible shock-absorbing structure. The outer connecting rod 11 has an outer curved rod 12 at its end away from the fixed rod 13, which curves toward the thigh. One end of the outer curved rod 12 is connected to the outer layer 4 of the flexible shock-absorbing structure. The convex surface of the outer curved rod 12 faces the outer layer 4 of the flexible shock-absorbing structure, while the convex surface of the inner curved rod 22 faces the inner layer 3 of the flexible shock-absorbing structure. The profile of the curved rods matches the inner surface of the flexible shock-absorbing structure, preventing the outer layer 4 and the inner layer 3 of the flexible shock-absorbing structure from being punctured by the inner connecting rod 21 and the outer connecting rod 11 during the stretching process.

[0043] The elastic bands 6 between the flexible shock-absorbing structure inner layer 3 and the flexible shock-absorbing structure outer layer 4 are spaced apart in a direction from the first fixing point 31 to the second fixing point 41. In the embodiment of the present application, two elastic bands 6 are provided, and the two elastic bands 6 are fixed to the edges of the flexible shock-absorbing structure inner layer 3 near the outside and inside of the knee joint, respectively. The spaced apart elastic bands 6 better transmit the force between the flexible shock-absorbing structure inner layer 3 and the flexible shock-absorbing structure outer layer 4.

[0044] After forming a U-shaped cut line on the flexible shock-absorbing structure's outer layer 4, a through-slot 61 is formed. This through-slot 61 extends from the first fixing point 31 to the second fixing point 41. The partially peeled structure on the flexible shock-absorbing structure's outer layer 4 forms the elastic band 6, the end of which is fixed to the flexible shock-absorbing structure's inner layer 3. When the flexible shock-absorbing structure's outer layer 4 and the flexible shock-absorbing structure's inner layer 3 are brought into close proximity, the elastic band 6 is distributed along the length of the through-slot 61 formed by the cut. Because the elastic band 6 is peeled from the flexible shock-absorbing structure's outer layer 4, the flexible shock-absorbing structure's outer layer 4 and the flexible shock-absorbing structure's inner layer 3 can be better repositioned when the two layers are brought into close proximity, simplifying the design of the flexible shock-absorbing structure's outer layer 4 and the flexible shock-absorbing structure's inner layer 3.

[0045] The lower limb knee joint energy absorption device also includes a knee joint connecting rod structure 5, which includes a first connecting rod 51 and a second connecting rod 52. One end of the first connecting rod 51 is rotatably connected to the bottom end of the fixed rod 13 of the thigh fixing assembly 1, and the first connecting rod 51 is provided with a slide groove 53 arranged along the length direction. One end of the second connecting rod 52 is rotatably connected to the top end of the fixed rod 13 of the calf fixing assembly 2, and the other end is provided with a slider 54 that slides in the slide groove 53. The slider 54 can rotate in the slide groove 53 during the sliding process.

[0046] The energy required for movement between the first connecting rod 51 and the second connecting rod 52 during knee flexion also dissipates kinetic energy originally applied to the knee joint, further absorbing energy. Furthermore, the maximum displacement of the first connecting rod 51 and the second connecting rod 52 limits the relative distance between the thigh and calf, restricting the normal range of motion of the thigh and calf. This reduces the load on the knee joint itself, relieves pressure on the knee joint, and reduces stress and pressure on the user's knee joint, thereby protecting the user's knee joint.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A lower limb knee joint energy absorption device, characterized in that: The flexible shock-absorbing structure comprises a thigh fixing component for fixing on the thigh, a calf fixing component for fixing on the calf, a flexible shock-absorbing structure inner layer and a flexible shock-absorbing structure outer layer, wherein the flexible shock-absorbing structure inner layer is arranged corresponding to the knee, and the flexible shock-absorbing structure outer layer is arranged on the side of the flexible shock-absorbing structure inner layer facing away from the knee; The calf fixing assembly is connected to a first fixing point on the inner layer of the flexible shock-absorbing structure on either the inner or outer side of the knee, and the thigh fixing assembly is connected to a second fixing point on the outer layer of the flexible shock-absorbing structure on the other side of the knee. The inner layer and the outer layer of the flexible shock-absorbing structure are connected by elastic bands arranged at intervals. When the knee joint is straightened, the inner layer of the flexible shock-absorbing structure and the outer layer of the flexible shock-absorbing structure are close to each other; when the knee joint is bent, the thigh fixing assembly and the calf fixing assembly drive the first fixing point and the second fixing point to move away from each other, and the inner layer of the flexible shock-absorbing structure covers and is in close contact with the knee; The thigh fixing assembly and the calf fixing assembly each include oppositely disposed fixing rods and straps surrounding the fixing rods, wherein the straps bind the opposite fixing rods and adhere them to the inner side or outer side of the leg respectively; The lower limb knee joint energy absorption device also includes a knee joint connecting rod structure, which includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the bottom end of the fixed rod of the thigh fixing assembly, and the first connecting rod is provided with a sliding groove arranged along the length direction. One end of the second connecting rod is rotatably connected to the top end of the fixed rod of the calf fixing assembly, and the other end is provided with a slider that slides in the sliding groove.

2. The lower limb knee joint energy absorption device according to claim 1, characterized in that: The top end of the fixing rod of the calf fixing assembly close to either the outside or inside of the leg is connected to an inner connecting rod, and the bottom end of the fixing rod of the thigh fixing assembly close to the other side of the leg is connected to an outer connecting rod; One end of the inner connecting rod is rotatably connected to the fixed rod, and the other end is connected to the inner layer of the flexible shock-absorbing structure. One end of the outer connecting rod is rotatably connected to the fixed rod, and the other end is connected to the outer layer of the flexible shock-absorbing structure.

3. The lower limb knee joint energy absorption device according to claim 2, characterized in that: The inner connecting rod is provided with an inner arc rod bent toward the calf side at one end away from the fixed rod, and one end of the inner arc rod is connected to the inner layer of the flexible shock-absorbing structure. The outer connecting rod is provided with an outer arc rod bent toward the thigh side at one end away from the fixed rod, and one end of the outer arc rod is connected to the outer layer of the flexible shock-absorbing structure.

4. The lower limb knee joint energy absorption device according to claim 1, characterized in that: The elastic bands between the inner layer of the flexible shock-absorbing structure and the outer layer of the flexible shock-absorbing structure are distributed at intervals along the direction from the first fixing point to the second fixing point.

5. The lower limb knee joint energy absorption device according to claim 1, characterized in that: After forming a U-shaped cutting line on the outer layer of the flexible shock-absorbing structure, a through groove is formed, and the through groove extends in the direction from the first fixed point to the second fixed point. The partially peeled structure forms the elastic band, and when the outer layer of the flexible shock-absorbing structure and the inner layer of the flexible shock-absorbing structure are close to each other, the elastic band is distributed along the length direction of the through groove.

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