Knee joint flexion maintaining device for knee joint replacement surgery

Abstract

The invention discloses a knee joint flexion keeping device for knee joint replacement surgery, which comprises a bottom surface frame, the border of the bottom surface frame is provided with at least one plane for stably placing a triangular prism support, and the bottom surface frame is provided with a plurality of uniformly arranged fixing bumps; the supporting frame is hinged to the bottom face frame, a leg fixing frame is hinged to the other end of the supporting frame, a positioning protruding block is arranged at the tail end of the leg fixing frame, the positioning protruding block is matched with the fixing protruding block in structure, and after the positioning protruding block and the fixing protruding block are fixed in an abutting mode, the three frames form a stable triangular structure. On the basis of improvement of an existing knee joint flexion maintaining device in the prior art, the supporting angle can be adjusted in a large range by arranging the matched protruding block structures between the leg supporting frame and the bottom face frame; when a large angle is needed, the positioning protruding block at the tail end of the leg supporting frame is moved to the side away from the supporting frame and then the angle is increased, and otherwise, the angle is reduced.

Description

Technical Field

[0001] The invention discloses a knee joint flexion maintaining device for knee replacement surgery, and relates to the technical field of knee joint flexion and extension maintaining devices. Background Art

[0002] Currently available knee flexion-preserving devices for knee replacement surgery are mostly simple triangular brackets. Due to their structural design, the flexion angle is not large enough. They also lack a fixed structure for the calf, requiring the patient to simply lean their leg against them for fixation, lacking traction for the calf. As can be seen from the above, existing knee flexion-preserving devices suffer from instability and limited leg extension angles after fixation.

[0003] SUMMARY OF THE INVENTION

[0004] The object of the present invention is to provide a knee flexion retaining device for knee replacement surgery to solve the technical problems described in the background art.

[0005] In order to achieve the above technical objectives and effects, the invention is implemented through the following technical solutions:

[0006] A knee flexion retaining device for knee replacement surgery includes a fixing frame, wherein the fixing frame is a triangular prism frame, and each plane of the triangular prism frame is a rectangular frame; the three rectangular frames include:

[0007] A bottom frame, wherein the frame of the bottom frame has at least one flat surface for stably placing the triangular prism bracket, and the bottom frame has a plurality of evenly arranged fixing protrusions;

[0008] A support frame is hinged to the bottom frame, and a leg fixing frame is hinged at the other end of the support frame. The end of the leg fixing frame has a positioning protrusion, and the positioning protrusion matches the fixing protrusion structure. After the positioning protrusion and the fixing protrusion are fixed, the three-part frame forms a stable triangular structure.

[0009] Furthermore, the fixing protrusion is a triangular protrusion inclined toward the supporting frame, and the positioning protrusion is an angular protrusion rotatably fixed to the end of the leg fixing frame, and the top of the angular protrusion matches the space formed between the positioning protrusion and the bottom frame.

[0010] Furthermore, the leg fixing frame has a calf fixing clamp, and the calf fixing clamp includes a top rod respectively arranged on the frame body on both sides of the support frame, and the end of the top rod has an arc block for fitting with the belt to fix the calf.

[0011] Furthermore, the angular protrusion is connected to the leg fixing frame via a sawtooth rotating mechanism, and the sawtooth rotating mechanism includes: a first toothed member integrally formed on the end of the leg fixing frame, and a second toothed member integrally formed on the angular protrusion and matching the first toothed member;

[0012] The first toothed member is engaged and fixed with the second toothed member, and the angled protrusion slides along the axial direction of the two toothed members and then separates from the leg fixing member.

[0013] Furthermore, a limiting member is provided on any plane side of the angular protrusion, and the limiting member limits the relative sliding of the first toothed member and the second toothed member after being moved.

[0014] Furthermore, the push rod is fixed through the leg frame and can move axially.

[0015] Furthermore, the top rod is threadedly connected to the leg frame and is rotationally fixed to the arc block.

[0016] Furthermore, the side of the arc-shaped block that fits the human body is covered with soft material.

[0017] Beneficial effects:

[0018] This invention improves upon existing knee flexion-maintaining devices. By providing matching protrusions between the leg support frame and the base frame, the present invention achieves wide adjustment of the support angle. Specifically, when a larger angle is required, the positioning protrusion at the end of the leg support frame is moved away from the support frame to increase the angle, while the opposite position is reduced. Furthermore, a calf-fixing clamp is provided on the leg support frame for securing the leg. This provides enhanced calf support compared to the simple frame of the prior art, improving the fixation and guiding the calf's posture.

[0019] Finally, the arc block and the rod body can rotate relative to each other so that they can adapt to different leg postures of the patient, that is, the pressure of the rod body on the patient's legs forces the arc block to change its posture naturally.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a knee joint flexion maintaining device described in an embodiment of the present invention;

[0022] Figure 2 It is a knee joint flexion maintaining device described in an embodiment of the present invention;

[0023] Figure 3This is a detailed structural diagram of the angular protrusion block described in an embodiment of the present invention;

[0024] Figure 4 This is a detailed structural diagram of the angular protrusion block described in an embodiment of the present invention;

[0025] Figure 5 It is a knee joint flexion maintaining device described in an embodiment of the present invention;

[0026] In the attached figure:

[0027] 1-leg fixing frame, 2-support frame, 3-bottom frame, 4-positioning protrusion, 5-fixing protrusion, 6-arc block, 7-rod body, 8-lifting part, 9-first toothed part, 10-second toothed part. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solution of the present invention, the present invention will be described in detail below with reference to embodiments.

[0029] Example 1

[0030] The support structure of this embodiment is improved based on the simple triangular structure bracket in the prior art, which improves the practicality of the knee flexion retaining device. In this embodiment, the device includes a fixing frame, which is a triangular prism bracket. Each plane of the triangular prism bracket is a rectangular frame. The structure composed of them is referenced Figure 1 .

[0031] Specifically, the three rectangular frames include:

[0032] The bottom frame has a frame with at least one plane for stably placing the triangular prism bracket, and the bottom frame has a plurality of evenly arranged fixing protrusions. The frame of the bottom frame can be of different structures. For example, when used on a hard, smooth ground, the edge of the bottom frame can be designed with a non-slip rubber pad to increase friction and ensure stability during use. In other embodiments, heavy objects or bags that can be filled with sand or water can be added to the edge to increase its own weight and further enhance its stability. Alternatively, a trapezoidal structure can be set on both sides of the bottom frame to increase stability.

[0033] A support frame is hinged to the bottom frame, and a leg fixing frame is hinged at the other end of the support frame. The end of the leg fixing frame has a positioning protrusion, and the positioning protrusion matches the fixing protrusion structure. After the positioning protrusion and the fixing protrusion are fixed, the three-part frame forms a stable triangular structure.

[0034] Specifically, the positioning protrusions are designed at the ends of the leg fixing frames, while the fixing protrusions are installed on the bottom frame. The positioning protrusions are designed to match the shape and structure of the fixing protrusions. When the two are fixed together, the leg fixing frame, support frame, and bottom frame form a stable triangular structure. This design not only improves overall stability, but also, by changing the relative position of the positioning protrusions and fixing protrusions, the angle between the leg fixing frame and the bottom frame can be adjusted, thereby adjusting the leg support angle.

[0035] The key to this structure is that it allows for adjustment of the leg support angle, primarily by changing the relative positions of the positioning and fixing protrusions. In some embodiments, the user can manually or electrically adjust the relative positions of the positioning and fixing protrusions, thereby changing the angle between the leg fixing frame and the bottom frame, thereby adjusting the leg support angle.

[0036] During use, place the device stably on the ground, then adjust the relative position of the positioning and fixing blocks to set the leg support angle as needed. Next, place the patient's legs on the leg fixation frame and secure them to the frame using the device's fixing devices, such as straps or clips. Adjust the tightness of the fixing devices while ensuring the patient's comfort and safety. At this point, the patient can begin rehabilitation training or rest. If the leg support angle needs to be adjusted during use, simply readjust the relative position of the positioning and fixing blocks.

[0037] In this embodiment, the fixing protrusion is a triangular protrusion inclined toward the supporting frame, and the positioning protrusion is an angular protrusion rotatably fixed to the end of the leg fixing frame, and the top of the angular protrusion matches the space formed between the positioning protrusion and the bottom frame.

[0038] The angled protrusions can be secured to the leg frame in a variety of ways. For example, a rotating shaft connection can be used, where the angled protrusions are directly secured to the end of the leg frame, enabling rotation of the angled protrusions. Alternatively, a spring and a limiter can be used, allowing the angled protrusions to rotate within a certain range while the limiter prevents excessive rotation. Alternatively, a telescopic rod can be used, with the angled protrusion secured to one end and the other end secured to the end of the leg frame. By varying the length of the rod, the position of the angled protrusions can be adjusted.

[0039] In other embodiments, the shape or design of the fixing protrusions can be changed to adapt to different ground surfaces or usage conditions. For example, multiple angled protrusions can be designed to provide more stability or accommodate a wider range of angle adjustments. Alternatively, the fixing method between the angled protrusions and the leg fixing frame can be changed, such as using magnets, suction cups, or other fixing devices to provide a faster or more stable fixing effect. In addition, other accessories or devices can be added, such as wrapping pads, to provide better user comfort; or measuring devices, such as angle indicators or pressure sensors, can be added to provide more accurate usage feedback.

[0040] In other embodiments, the fixed and angled protrusions can be made of a variety of materials, such as metal, plastic, rubber, or composite materials, to meet different performance requirements, such as strength, elasticity, durability, or weight. The surfaces of the fixed and angled protrusions can also be specially treated, such as with a non-slip coating, surface treatment, or protective coating, to increase service life, enhance safety, or improve tactile feel. Furthermore, the size and shape of the fixed and angled protrusions can be designed as needed to meet different usage requirements, such as adapting to different floor surfaces or usage conditions, providing a wider range of angle adjustment, or providing greater stability.

[0041] Example 2

[0042] The structure of this embodiment is a further improvement based on the structure described in Example 1. Figure 2 The leg fixing frame has a calf fixing clamp, and the calf fixing clamp includes a top rod respectively arranged on the frame body on both sides of the support frame, and the end of the top rod has an arc block for fitting with the belt to fix the calf.

[0043] The calf clamp further provided in this embodiment is primarily intended to strengthen the fixation of the calf and improve stability during use. In actual use, the small contact area between the patient's calf and the support frame and insufficient fixing points may cause the calf to slip during use, affecting stability. The calf clamp, with its push rod design, firmly presses the calf against the support frame, increasing the contact area and points, and enhancing stability.

[0044] In a specific embodiment, the angular protrusion is connected to the leg fixing frame via a sawtooth rotating mechanism, which includes: a first toothed member integrally formed on the end of the leg fixing frame, and a second toothed member integrally formed on the angular protrusion and matching the first toothed member. The specific structure of the sawtooth rotating mechanism can be referred to Figure 3This design allows the angular protrusion to rotate within a certain range, and the positioning of the angular protrusion is achieved through the engagement of the first toothed part and the second toothed part.

[0045] During use, simply twisting the angled block engages or disengages the teeth, allowing the block to rotate or position. This design allows users to adjust the angle of the angled block to suit their needs, while also ensuring stability during use and preventing unintended rotation.

[0046] The first toothed member is engaged and fixed with the second toothed member, and the angled protrusion slides along the axial direction of the two toothed members and then detaches from the leg fixing member. Figure 4 It is understood that the angled protrusion can be removed, rotated to a certain angle, and then re-attached, which changes the angle between the angled protrusion and the leg fixing frame. During use, the angle between the angled protrusion and the leg fixing frame may need to be adjusted according to the specific use environment and the user's physical condition. For example, for users who need to be in a half-squatting state for a long time, it may be necessary to adjust the angle between the angled protrusion and the leg fixing frame to a smaller angle to reduce the burden on the legs; for users who need to stand up frequently, it may be necessary to adjust the angle between the angled protrusion and the leg fixing frame to a larger angle to facilitate the user to stand up their legs.

[0047] In some embodiments, a stopper is provided to secure any planar side of the angled protrusion. This stopper effectively limits relative sliding between the first and second toothed members, preventing unintended changes in the angle between the angled protrusion and the leg fixing frame during use, which could affect performance. The stopper can take various forms, such as a buckle, a retaining ring, a bolt, and the like, all of which are readily apparent to those skilled in the art.

[0048] In one embodiment, the limiting member may be a buckle, which is disposed between the first toothed member and the second toothed member. The elastic deformation of the buckle can limit the relative sliding of the first toothed member and the second toothed member. In another embodiment, the limiting member may be a retaining spring, which is disposed at the junction of the first toothed member and the second toothed member. The elasticity of the retaining spring can tightly clamp the first toothed member and the second toothed member together to limit their relative sliding. In yet another embodiment, the limiting member may be a bolt, which passes through the junction of the first toothed member and the second toothed member. The rotation of the bolt can tighten or loosen the first toothed member and the second toothed member to achieve the purpose of limiting or allowing their relative sliding. The above various limiting member settings can effectively adjust and fix the angle between the angled protrusion and the leg fixing frame to meet different usage environments and user needs.

[0049] According to the structure, the push rod is threadedly connected to the leg frame and rotationally fixed to the arc block. The threaded connection between the push rod and the leg frame and the rotational fixation between the push rod and the arc block work together to realize the function of relying on the pressure of the rod body to the patient's leg to force the arc block to change its posture naturally. Specifically, when the push rod is subjected to pressure, this pressure will be transmitted to the leg frame through the threaded connection. At the same time, due to the rotational fixation between the push rod and the arc block, this pressure will guide the arc block to rotate along the rotation axis of the push rod. Therefore, the arc block can naturally change its posture in response to the pressure applied by the rod body, thereby better adapting to the shape and posture of the patient's legs and providing more comfortable and stable support.

[0050] The side of the curved block that fits the body is also covered with a soft material. This material serves two main purposes: first, it relieves the pressure of the rod on the patient's legs, reducing the discomfort the patient may feel during use; second, it provides a certain degree of anti-slip effect, helping the device to be more stably fixed on the patient's leg.

[0051] In terms of the choice of soft materials, different material types can be selected based on specific usage requirements and cost considerations. For example, silicone can be selected as a soft material. Since silicone has good softness and anti-slip properties, the use of silicone can improve the stability of the device on the patient's leg while ensuring the comfort of the device. In addition, silicone also has good wear resistance and aging resistance, which can improve the durability of the device. For a lower-cost option, polyurethane foam can be considered. Although polyurethane foam is not as wear-resistant and aging-resistant as silicone, its excellent softness and good anti-slip properties make it still a viable option. Of course, other types of soft materials, such as cloth, rubber, etc., can also be considered. The specific choice should be made based on the specific usage requirements and cost considerations of the device.

[0052] In other cases, since the lower limbs need to be raised, the height of the bottom frame needs to be further adjusted, and a lifting member can be further provided in the corresponding embodiment. For specific circumstances, refer to Figure 5 That is, the end of the bottom support frame is also rotatably connected to a lifting member, and the lifting member is a rod body that contacts the ground after rotation to lift up the bottom frame.

[0053] The above is only part of the embodiment of the application and does not limit the application in any form. Any simple modification, equivalent change and modification made to the above embodiment still falls within the scope of protection of the technical solution of the application.

Claims

1. A knee flexion retaining device for knee replacement surgery, characterized in that: It includes a fixing frame, which is a triangular prism bracket, and each plane of the triangular prism bracket is a rectangular frame; the three rectangular frames include: A bottom frame, wherein the frame of the bottom frame has at least one flat surface for stably placing the triangular prism bracket, and the bottom frame has a plurality of evenly arranged fixing protrusions; A support frame is hinged to the bottom frame, and a leg fixing frame is hinged at the other end of the support frame. The end of the leg fixing frame has a positioning protrusion, and the positioning protrusion matches the fixing protrusion structure. After the positioning protrusion and the fixing protrusion are fixed, the three-part frame forms a stable triangular structure.

2. The knee flexion retaining device for knee replacement surgery according to claim 1, characterized in that: The fixing protrusion is a triangular protrusion inclined toward the supporting frame, and the positioning protrusion is an angular protrusion rotatably fixed to the end of the leg fixing frame. The top of the angular protrusion matches the space formed between the positioning protrusion and the bottom frame.

3. The knee flexion retaining device for knee replacement surgery according to claim 2, characterized in that: The leg fixing frame has a calf fixing clamp, and the calf fixing clamp includes a top rod respectively arranged on the frame bodies on both sides of the support frame, and the end of the top rod has an arc block for fitting with the belt to fix the calf.

4. The knee flexion retaining device for knee replacement surgery according to claim 3, characterized in that: The angular protrusion is connected to the leg fixing frame via a sawtooth rotating mechanism, the sawtooth rotating mechanism comprising: a first toothed member integrally formed on the end of the leg fixing frame, and a second toothed member integrally formed on the angular protrusion and matching the first toothed member; The first toothed member is engaged and fixed with the second toothed member, and the angled protrusion slides along the axial direction of the two toothed members and then separates from the leg fixing member.

5. The knee flexion retaining device for knee replacement surgery according to claim 4, characterized in that: A limiting member is further provided on any plane side of the angular protrusion, and the limiting member limits the relative sliding of the first toothed member and the second toothed member after being moved.

6. The knee flexion retaining device for knee replacement surgery according to claim 3, characterized in that: The push rod is fixed in the leg frame and can move axially.

7. The knee flexion retaining device for knee replacement surgery according to claim 6, characterized in that: The top rod is threadedly connected to the leg frame and is rotationally fixed to the arc block.

8. The knee flexion retaining device for knee replacement surgery according to claim 3, characterized in that: The side of the arc-shaped block that fits the human body is also covered with soft material.

9. The knee flexion retaining device for knee replacement surgery according to claim 1, wherein: The end of the bottom support frame is also rotatably connected to a lifting member, and the lifting member is a rod body that contacts the ground after rotation to lift up the bottom frame.

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