Protector for preventing excessive movement of knee joint

Abstract

The protector comprises an arc rod, one end of the arc rod penetrates through a shank rod, the other end of the arc rod penetrates through a thigh rod, the shank rod is rotationally connected with the thigh rod, the rotating center of the shank rod and the thigh rod coincides with the circle center of the arc rod, the arc rod is in sliding fit with the shank rod and the thigh rod, and limiting blocks are arranged at the two ends of the arc rod. The limiting blocks are located on the sides, back to the arc rods, of the shank rods and the thigh rods. The arc rod is sleeved with a spring, the two ends of the spring abut against the shank rod and the thigh rod respectively, the arc rod is provided with through holes evenly distributed in the arc shape, the thigh rod is provided with a bolt, and the bolt can penetrate through the through holes to fix the arc rod and the thigh rod. The knee joint exerciser has the advantages that the range of the movement angle is directly and specifically limited while the knee joint can be movably exercised, so that the knee joint is well protected; and the angle adjustment operation is very convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of knee joint protection devices, specifically a knee joint protection device. Background Technology

[0002] The entire rehabilitation process after knee replacement surgery lasts for 6 months. In the current medical environment, home-based self-rehabilitation learning and exercise are especially important. Patients usually need to perform rehabilitation exercises to achieve high knee flexion range of motion after surgery, in order to promote the early and full recovery of normal knee function.

[0003] Currently, clinical flexion exercises can be divided into two categories: those without aids and those with aids. ① Unaided flexion exercises are performed in a seated position, where the patient uses their hands to forcefully open and close their legs to achieve the purpose of flexing the knee joint. However, this method cannot specifically control the range of motion of the knee joint, requires a high level of understanding and adaptation from the patient, and is prone to misoperation leading to excessive knee joint movement, posing a significant exercise risk. ② Aided flexion exercises: Existing technologies include many knee joint exercise devices with rotating joints. For example, CN210302222U discloses a knee joint exercise device that uses a pull ring at the top of the traction belt to allow the patient to easily hold the traction belt and perform leg flexion and extension movements. An angle measuring device is installed between the traction belts to measure the degree of knee flexion, enabling the measurement of the knee flexion angle between the thigh and lower leg. Furthermore, a support rod allows the flexion angle between the first and second rotating rods to be adjustable and fixed, meeting the training requirements of patients at different rehabilitation stages and facilitating fixed examination.

[0004] However, this solution requires a protractor to adjust the angle between the thigh and calf. The protractor can only provide the angle and offer a warning, but it cannot limit the knee flexion or prevent the knee from moving erratically, thus failing to provide direct and specific protection. In addition, the first and second rotating rods rotate freely. Although the support rods can adjust and fix the angle, it is impossible to perform knee flexion angle exercises after installation. When changing the angle, it is necessary to disassemble and replace the support rods of different lengths and reinstall them, which is very inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a knee joint protector to prevent excessive knee joint movement, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model discloses a knee joint protection device to prevent excessive knee joint movement, comprising an arc rod, one end of which passes through a lower leg rod and the other end of which passes through a thigh rod. The lower leg rod and the thigh rod are rotatably connected and their rotation centers coincide with the center of the arc rod. The arc rod is slidably engaged with the lower leg rod and the thigh rod. Limiting blocks are provided at both ends of the arc rod, and the limiting blocks are located on the side of the lower leg rod and the thigh rod facing away from the arc rod.

[0008] The arc rod is fitted with a spring, and the two ends of the spring respectively abut against the lower leg rod and the upper leg rod. The arc rod has through holes evenly distributed along the arc. The upper leg rod is equipped with a bolt, which can be inserted through the through holes to fix the arc rod to the upper leg rod.

[0009] Both the lower leg bar and the upper leg bar are equipped with fixed straps, and the straps have Velcro fasteners.

[0010] As an improvement, the arc rod is a semi-circular rod.

[0011] As an improvement, the limiting block is fixedly connected to the arc rod.

[0012] As an improvement, the spring is provided with fixing blocks at both ends, and the two fixing blocks are engaged with the lower leg rod and the upper leg rod.

[0013] As an improvement, the number of through holes is eighteen.

[0014] As an improvement, both ends of the bolt are recessed into the thigh bar.

[0015] The advantages of this invention compared to existing technologies are as follows: the arc rod has multiple evenly distributed through holes for fixing the angle, which directly and specifically limits the range of motion of the knee joint while it can be exercised, avoiding excessive knee joint movement and providing good protection for the knee joint; the spring makes the greater the degree of knee flexion, the greater the force required, which not only avoids excessive movement of the knee joint and damage caused by random movement, but also allows for intentional and active exercise, promoting the exercise effect; the angle adjustment is very convenient. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings listed below are only some structural schematic diagrams of this utility model, and not all of them.

[0017] Figure 1 This is a schematic diagram of the structure of a knee joint protector to prevent excessive knee joint movement according to this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of a knee joint protector to prevent excessive knee joint movement according to this utility model. Figure 2.

[0019] Figure 3 This is the usage state of a knee joint protector that prevents excessive movement according to this utility model. Figure 1 .

[0020] Figure 4 This is a cross-sectional view of a knee joint protector according to the present invention.

[0021] Figure 5 This is a top view of the arc rod of a knee joint protector according to this utility model.

[0022] Figure 6 This is a diagram showing the connection between the lower leg bar and the thigh bar of a knee joint protector that prevents excessive knee joint movement, according to this utility model.

[0023] Figure 7 This is a schematic diagram of the bolt structure of a knee joint protection device according to this utility model.

[0024] Figure 8 This is the usage state of a knee joint protector that prevents excessive movement according to this utility model. Figure 2 .

[0025] Figure label:

[0026] 1. Arc rod; 2. Lower leg rod; 3. Upper leg rod; 4. Limiting block; 5. Spring; 6. Through hole; 7. Bolt; 8. Strap; 9. Fixing block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the description of the embodiments of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance. The use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be perfectly horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of this utility model, the terms "multiple" or "several" refer to at least two.

[0031] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] This embodiment is combined with the appendix Figures 1 to 8 This paper provides a detailed description of a knee joint protector to prevent excessive knee joint movement.

[0033] This embodiment discloses a knee joint overextension protector, comprising an arc-shaped rod 1. One end of the arc-shaped rod 1 passes through a lower leg rod 2, and the other end passes through a thigh rod 3. The lower leg rod 2 and the thigh rod 3 are rotatably connected, and their rotation centers coincide with the center of the arc-shaped rod 1. The lower leg rod 2 and the thigh rod 3 can be appropriately widened to more stably fit against the outer side of the lower leg and thigh. The arc-shaped rod 1 slides with the lower leg rod 2 and the thigh rod 3. Limiting blocks 4 are provided at both ends of the arc-shaped rod 1. The limiting blocks 4 are located on the side of the lower leg rod 2 and the thigh rod 3 facing away from the arc-shaped rod 1; the limiting blocks 4 prevent the arc-shaped rod 1 from detaching from the lower leg rod 2 and the thigh rod 3.

[0034] The arc rod 1 is fitted with a spring 5, and the two ends of the spring 5 respectively abut against the lower leg rod 2 and the upper leg rod 3. The arc rod 1 is provided with through holes 6 evenly distributed along the arc, and the upper leg rod 3 is provided with bolts 7. The bolts 7 can be inserted through the through holes 6 to fix the arc rod 1 and the upper leg rod 3.

[0035] Both the lower leg bar 2 and the upper leg bar 3 are equipped with fixed straps 8, and the straps 8 have Velcro. Both the lower leg bar 2 and the upper leg bar 3 are equipped with two straps 8, with Velcro hooks at the movable end and Velcro loops at the fixed end.

[0036] The arc rod 1 is a semi-circular rod. The lower leg rod 2 and the thigh rod 3 can be opened up to 180 degrees.

[0037] The limiting block 4 is fixedly connected to the arc rod 1.

[0038] The spring 5 has fixing blocks 9 at both ends, and the two fixing blocks 9 are engaged with the lower leg rod 2 and the thigh rod 3. The limiting block 4 presses against the lower leg rod 2 or the thigh rod 3 with a flat surface. When the lower leg rod 2 and the thigh rod 3 are open at 180 degrees, the spring is in its natural state.

[0039] There are eighteen through holes 6. The minimum angle adjustment between the lower leg rod 2 and the upper leg rod 3 is 10 degrees.

[0040] Both ends of the bolt 7 are recessed into the thigh rod 3. The hexagonal nut is located in the hexagonal hole, and the fixing end is located in the round hole to avoid protruding and scratching the leg side.

[0041] In practice, place the arc-shaped rod 1 on the outside of the knee joint that needs protection, facing downwards. First, loosen bolt 7 to allow the arc-shaped rod 1 and thigh rod 3 to slide freely. Rotate the calf rod 2 and thigh rod 3 so that they are against the outside of the calf and thigh (spring 5 is compressed), with the fixed end of bolt 7 facing outwards. Then, wrap each strap 8 around the calf and thigh respectively. Figure 3 , 8 Based on the current angle between the lower leg and thigh to prevent excessive knee joint movement (the angle can be adjusted in 10-degree increments), tighten bolt 7 through the through hole 6. The thigh end of the arc rod 1 is then fixed, completing the installation and fixation of the entire protector. At this point, the knee joint can move, but the range of motion is restricted, thus protecting the knee joint and preventing excessive movement. The maximum opening angle of the lower leg and thigh is fixed to prevent over-opening, and the legs can be closed within this maximum opening angle. Because spring 5 is compressed, force is required to close the legs, and the greater the degree of knee flexion, the greater the force required. This prevents excessive knee joint movement that could lead to injury, while also providing an intentional, active exercise effect, promoting the training outcome.

[0042] This protector is suitable for both left and right knee joints and provides protection at any angle.

[0043] The present invention and its embodiments have been described above. This description is not restrictive, and the actual scope of protection is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A knee joint protector to prevent excessive knee joint movement, characterized in that, Includes an arc rod (1), one end of which passes through the lower leg rod (2) and the other end of which passes through the thigh rod (3). The lower leg rod (2) and the thigh rod (3) are rotatably connected and their rotation centers coincide with the center of the arc rod (1). The arc rod (1) is slidably engaged with the lower leg rod (2) and the thigh rod (3). Both ends of the arc rod (1) are provided with limiting blocks (4), which are located on the side of the lower leg rod (2) and the thigh rod (3) facing away from the arc rod (1). The arc rod (1) is fitted with a spring (5), and the two ends of the spring (5) respectively press against the lower leg rod (2) and the thigh rod (3). The arc rod (1) is provided with through holes (6) evenly distributed along the arc. The thigh rod (3) is provided with bolts (7). The bolts (7) can be inserted through the through holes (6) to fix the arc rod (1) and the thigh rod (3). Both the lower leg bar (2) and the thigh bar (3) are equipped with fixed straps (8), and the straps (8) have Velcro.

2. The knee joint over-extension protector according to claim 1, characterized in that, The arc rod (1) is a semi-circular rod.

3. The knee joint over-extension protector according to claim 2, characterized in that, The limiting block (4) is fixedly connected to the arc rod (1).

4. The knee joint over-extension protector according to claim 1, characterized in that, The spring (5) has fixing blocks (9) at both ends, and the two fixing blocks (9) are pressed together with the lower leg rod (2) and the upper leg rod (3).

5. A knee joint over-extension protector according to claim 1, characterized in that, There are eighteen through holes (6).

6. A knee joint over-extension protector according to claim 1, characterized in that, The two ends of the bolt (7) are recessed into the thigh bar (3).

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