Lower limb traction patient assistive care system

Abstract

This invention belongs to the field of orthopedic nursing equipment, specifically disclosing a lower limb traction patient auxiliary nursing system, including a nursing bed, a fixation mechanism, a traction mechanism, and a control mechanism. The fixation mechanism includes an L-shaped fixation plate and straps mounted on the fixation plate. The fixation plate includes a horizontal part and a vertical part; the vertical part is used to abut against the patient's foot, and the horizontal part is used to be placed under the patient's ankle. The traction mechanism includes a bracket mounted on the nursing bed, a pulley rotatably connected to the bracket, a mounting frame mounted on the nursing bed, a rotating shaft rotatably connected to the mounting frame, and a connecting rope connecting the rotating shaft and the fixation plate. The pulley has an annular groove, and the connecting rope extends from the fixation plate, passes through the annular groove, and then wraps around and fixes itself to the outer wall of the rotating shaft. Using this invention, the problem of the traction force being easily affected in practical applications of traditional "strap-pulley-weight" traction systems can be solved.

Description

Technical Field

[0001] This invention belongs to the field of orthopedic nursing equipment, specifically relating to a lower limb traction patient auxiliary nursing system. Background Technology

[0002] Lower limb skeletal traction is a common orthopedic treatment for severe injuries such as femoral shaft fractures and pelvic fractures. Currently, the widely used clinical approach involves applying a special strap to the patient's leg. This strap is connected to a pulley frame at the foot of the bed via a traction rope. The traction rope passes over a pulley on the frame, and a weight is suspended at the end of the rope, utilizing the weight's gravity to generate continuous traction. However, this traditional "strap-pulley-weight" traction system has the following problems in practical application:

[0003] 1. The weights are suspended freely on the outside of the foot of the bed by the traction rope. When the bed is subjected to external impact or someone accidentally touches the weights while passing by the foot of the bed, the weights are prone to shaking, which causes fluctuations in the traction force of the traction rope. This results in the patient's legs being subjected to dynamic impact load, affecting fracture healing.

[0004] 2. During bed rest, patients may unconsciously turn their legs or ankles for comfort, causing the straps to deflect and pulling on the traction rope, affecting the traction force. Especially when the traction rope shifts between the pulley and the strap, the direction of the traction force will also shift.

[0005] 3. The bandage relies on friction between the skin for fixation. However, when the patient sweats or produces sebum, the coefficient of friction decreases significantly, causing the bandage to slowly slip along the limb's axis. As time increases, the traction force gradually decreases, requiring re-bandaging. Furthermore, it's crucial to avoid over-tightening the bandage, as this can impair blood circulation. Even if the bandage doesn't slip relative to the limb, the patient's body may slowly move towards the foot of the bed under prolonged traction, affecting the traction force. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a lower limb traction patient assistance system to solve the problem that the traction force of traditional "strapping-pulley-weight" traction systems is easily affected in practical applications.

[0007] According to embodiments of the present invention, the present invention adopts the following technical solution:

[0008] The lower limb traction patient assistance system includes a nursing bed, a fixation mechanism, a traction mechanism, and a control mechanism. The fixation mechanism includes an L-shaped fixation plate and fixing components mounted on the plate. The fixation plate has a horizontal and a vertical section; the vertical section is used to abut against the patient's foot, and the horizontal section is used to position itself below the patient's ankle. The fixing components include a flexible pad detachably connected to the inside of the fixation plate and straps fixed to the flexible pad. The straps are used to secure the patient's ankle and foot to the fixation plate. The traction mechanism includes a bracket mounted on the nursing bed, pulleys rotatably connected to the bracket, a mounting frame mounted on the nursing bed, a rotating shaft rotatably connected to the mounting frame, and a connecting... A connecting rope is attached between the rotating shaft and the fixed plate. An annular groove is provided on the pulley. The connecting rope extends from the fixed plate, passes through the annular groove, and then wraps around and is fixed to the outer wall of the rotating shaft. The control mechanism includes a controller, an alarm, and a tension detection device mounted on the fixed plate. Both the tension detection device and the alarm are signal-connected to the controller. The tension detection device detects the tension applied by the connecting rope to the fixed plate. The controller's signal receiver receives the tension signal from the tension detection device, and the controller's signal output controls the rotating shaft to rotate based on the tension signal. When the controller continuously issues commands to drive the rotating shaft for a duration exceeding a threshold, the controller's signal output controls the alarm to sound.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. The traction force is adjusted by winding or unwinding the connecting rope through a rotating shaft, replacing the traditional method of applying gravity using suspended weights. Furthermore, the direction of the connecting rope can be changed via pulleys, allowing the rotating shaft to be positioned below or above the foot of the nursing bed, reducing its footprint in the ward.

[0011] 2. By detecting the tension on the fixation plate, the rotation of the shaft is controlled to maintain the stability of the traction force. At the same time, when the patient's body moves towards the foot of the bed, or when the fixation plate tends to detach from the patient's feet, the tension signal will change, thereby allowing for real-time adjustment of the traction force and reducing the impact on the traction force.

[0012] 3. Building upon the bandages, the design of the fixation plate focuses on stabilizing the patient's ankle and foot. Based on the angle between the foot and ankle, the bandages create a certain constraint, reducing the possibility of the fixation plate moving relative to the patient's leg, thereby minimizing the impact on traction. Furthermore, stabilizing the foot can restrict ankle movement to some extent, thus reducing the impact of unconscious leg twisting.

[0013] The flexible pad design enhances patient comfort. Due to individual foot shape or posture issues, patients' feet may not fully align with the vertical part of the body, preventing the straps from tightening properly. Even if the straps are forcibly tightened, it can cause discomfort. Therefore, the flexible pad, through its deformable nature, provides support to the patient's feet, improving comfort while maintaining a tight fit. Furthermore, the flexible pad is detachable and attached to the fixing plate, allowing for one-time use and disinfection, reducing the risk of cross-infection.

[0014] 4. If the controller continuously issues commands to drive the shaft to rotate for a period of time exceeding the threshold, it indicates that the adjustment time is too long and there may be a malfunction. After the alarm sounds, medical staff can intervene to handle the situation.

[0015] Furthermore, the connecting rope is fixed to the lower part of the vertical section, and the line connecting the connecting rope from the vertical section to the pulley is parallel to the horizontal section.

[0016] Furthermore, the surface of the nursing bed includes a flat part and an inclined part, with an obtuse angle between the inclined part and the flat part. The fixing mechanism and the traction mechanism are both installed at the free end of the inclined part.

[0017] Furthermore, the inclined portion is hinged to the flat portion.

[0018] Furthermore, the support includes two rods perpendicular to the surface of the inclined portion, and a pulley is rotatably connected between the two rods; the rods are slidably connected to the inclined portion in a direction perpendicular to the surface of the inclined portion, or the rods are telescopically connected in a direction perpendicular to the surface of the inclined portion.

[0019] Furthermore, a guide rod is fixed to one end of the support rod near the pulley, and a sliding hole is provided on the vertical part. The end of the guide rod is inserted into the sliding hole and slidably set relative to the sliding hole.

[0020] Furthermore, the fixation mechanism also includes a limiting plate installed on the nursing bed. There are two limiting plates, and a limiting groove is formed between the two limiting plates for limiting the patient's lower leg and / or thigh.

[0021] Furthermore, the limiting plate is provided with several push rods along its length. The push rods are slidably connected to the limiting plate, with one end of the push rod extending into the limiting groove. The end of the push rod located in the limiting groove is rotatably connected to a roller, and the rotation axis of the roller and the sliding path of the push rod are perpendicular to each other.

[0022] Furthermore, a flexible sleeve is fitted onto the outer wall of the roller.

[0023] Furthermore, the straps are provided in multiple sets, each set of straps includes a first section and a second section respectively fixed to both sides of the flexible pad, the first section and the second section are detachably connected; a pressure sensor is installed on the side of the first section and / or the second section facing the flexible pad. Attached Figure Description

[0024] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the limiting plate, push rod, and roller in an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the fixing plate, bracket, and pulley in an embodiment of the present invention.

[0027] Figure 4 This is a front view of an embodiment of the present invention.

[0028] Figure 5 for Figure 4 Enlarged view of section A.

[0029] In the diagram: 1. Flat section; 2. Inclined section; 3. Bed board; 4. Support leg; 5. Connecting rod; 6. Limiting plate; 7. Push rod; 8. Roller; 9. Limiting groove; 10. Horizontal section; 11. Vertical section; 12. Fixing plate; 13. First section; 14. Second section; 15. Straps; 16. Mounting frame; 17. Rotating shaft; 18. Connecting rope; 19. Guide rod; 20. Support rod; 21. Pulley; 22. Annular groove; 23. Tensile testing piece; 24. Flexible pad. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings, and specific embodiments are given.

[0031] like Figure 1 As shown, the lower limb traction patient assistance system includes a nursing bed, a fixation mechanism, a traction mechanism, and a control mechanism. The basic structure of the nursing bed is designed with reference to existing beds. For example, the nursing bed includes a bed board 3 and support legs 4 fixed at the four corners of the bed board 3. Connecting rods 5 are connected between the bottoms of adjacent support legs 4. Guardrails can also be installed on both sides of the bed board 3 as needed.

[0032] Combination Figure 3 As shown, the fixation mechanism includes an L-shaped fixation plate 12 and a fixing member disposed on the fixation plate 12. The fixation plate 12 includes a horizontal part 10 and a vertical part 11. The vertical part 11 is used to abut against the patient's foot, and the horizontal part 10 is used to be placed on the lower side of the patient's ankle. The fixation plate 12 is made of PC engineering plastic. In order to improve the comfort of ankle placement, the upper surface of the free end of the horizontal part 10 is provided with a wedge surface, and the thickness of the horizontal part 10 needs to be designed to be as small as possible to avoid raising the ankle too much.

[0033] The fasteners include a flexible pad 24 detachably connected to the inner side of the fixing plate 12 and a strap 15 fixed to the flexible pad 24. The flexible pad 24 can be made of medical-grade polyurethane memory foam, and the strap 15 can be made of medical elastic bandage or high-strength, low-allergenic synthetic fiber nylon strap. In actual design, a plastic base is installed on the fixing plate 12 by means of snap-fit, bolt connection, or binding. The flexible pad 24 is adhered to the plastic base, realizing a detachable connection between the flexible pad 24 and the fixing plate 12. Alternatively, the flexible pad 24 can be directly bound to the fixing plate 12. The flexible pad 24 needs to be changed and disinfected after each use to reduce the risk of cross-infection.

[0034] In actual design, multiple sets of straps 15 are provided for better fixation. Each set of straps 15 includes a first section 13 and a second section 14 respectively fixed to both sides of the flexible pad 24. The first section 13 and the second section 14 are detachably connected. Specifically, in this embodiment, Velcro is attached to the first section 13 and the second section 14, and the connection between the first section 13 and the second section 14 is completed by the mutually cooperating Velcro.

[0035] The traction mechanism includes a bracket mounted on the nursing bed, a pulley 21 rotatably connected to the bracket, a mounting frame 16 mounted on the nursing bed, a rotating shaft 17 rotatably connected to the mounting frame 16, and a connecting rope 18 connecting the rotating shaft 17 and the fixing plate 12. Both the bracket and the mounting frame 16 are detachable (e.g., bolted) on the nursing bed. In this embodiment, the bracket is mounted on the bed board 3 at the foot of the nursing bed, and the mounting frame 16 is mounted below the bracket. Specifically, the mounting frame 16 is mounted on the connecting rod 5 at the foot of the nursing bed. An annular groove 22 is provided on the pulley 21. The connecting rope 18 extends from the fixing plate 12, passes through the annular groove 22, and is wound and fixed to the outer wall of the rotating shaft 17. Rotating the rotating shaft 17 loosens or winds the connecting rope 18. A motor for driving the rotating shaft 17 is fixed on the mounting frame 16.

[0036] Combination Figure 5 As shown ( Figure 5 (The fixed component is not shown in the diagram). The control mechanism includes a controller, an alarm, and a tension detection element 23 mounted on the fixed plate 12. Both the tension detection element 23 and the alarm are signal-connected to the controller. The tension detection element 23 detects the tension applied by the connecting rope 18 to the fixed plate 12. The controller's signal receiving end receives the tension signal from the tension detection element 23, and the controller's signal output end controls the rotation of the rotating shaft 17 based on the tension signal. Specifically, the controller uses a conventional embedded microcontroller, and the tension detection element 23 uses a conventional resistance strain gauge miniature tension / compression sensor. By mounting the tension detection element 23 on the fixed plate 12 and connecting it in series in the force transmission path of the connecting rope 18, the tension applied by the connecting rope 18 to the fixed plate 12 can be detected in real time, and the tension signal is converted into an analog voltage and transmitted to the controller.

[0037] After receiving the tension signal, the controller integrates an analog-to-digital converter to convert it into a real-time tension value Fa. Medical staff pre-set a target traction force range Fb-Fc. When Fa is within the target traction force range, the controller does not issue a command, and the rotating shaft 17 remains stationary. When Fa≤Fb, the controller controls the motor to drive the rotating shaft 17 to rotate forward, causing the connecting rope 18 to wrap around the rotating shaft 17 and tighten, thereby increasing the tension on the fixing plate 12 until the tension enters the target traction force range. When Fa≥Fc, the controller controls the motor to drive the rotating shaft 17 to rotate in reverse, and the connecting rope 18 on the rotating shaft 17 is released, causing the tension to fall back into the target traction force range.

[0038] When the controller continuously issues commands to drive the rotating shaft 17 for a duration exceeding a threshold, the controller's signal output will activate an alarm. Specifically, the alarm will be a readily available technology that can generate an alarm using sound, light, or electrical signals, such as a buzzer. A preset maximum traction adjustment time (threshold) Ta is set. If the controller continuously issues commands to drive the rotating shaft 17 for a duration Tb ≥ Ta, it indicates that the adjustment time is too long and a malfunction may exist, requiring intervention from medical personnel. For example, if the rotating shaft 17 is in the forward rotation phase and the connecting rope 18 cannot be tightened, it may be due to the fixation plate 12 disengaging from the patient's foot, preventing continued traction. Conversely, if the rotating shaft 17 is in the reverse rotation phase and insufficient length of the connecting rope 18 cannot be released, it may be due to the rotating shaft 17 becoming stuck, resulting in excessive traction.

[0039] In practical use, the patient lies flat on the nursing bed, the flexible pad 24 is installed on the fixation plate 12, the fixation plate 12 is then placed on the patient's feet, the patient's ankle is placed on the horizontal part 10, the flexible pad 24 at the bottom of the patient's foot and the vertical part 11 is then attached, and multiple sets of straps 15 are fixed in the direction from the distal end to the proximal end, thereby fixing the patient's ankle and foot on the fixation plate 12.

[0040] The target traction force range is set according to the patient's weight and condition. To facilitate the fixation of the strap 15, the connecting rope 18 is initially in a slack state. Then, the motor is started, controlling the rotating shaft 17 to rotate forward, causing the connecting rope 18 to tighten around the rotating shaft 17, thereby increasing the tension on the fixing plate 12 until the tension enters the target traction force range, at which point the motor is turned off. During traction treatment and care, the tension detection device 23 monitors in real time and can adjust the traction force to stay within the target range.

[0041] In another embodiment of the invention, combined with Figure 4As shown, the surface of the nursing bed includes a flat section 1 and an inclined section 2, with an obtuse angle between the inclined section 2 and the flat section 1. The fixing mechanism and traction mechanism are both installed at the free end of the inclined section 2. In actual design, the angle between the inclined section 2 and the flat section 1 is between 172 and 176 degrees. When the patient is lying flat, the upper body is located on the flat section 1, while the lower limbs are located on the inclined section 2. This angle setting prevents the patient's entire body from unconsciously moving towards the foot of the bed after traction. The angle between the inclined section 2 and the flat section 1 can be set as a smooth corner with a curve transition. Alternatively, depending on actual usage needs, a thick mattress or flexible support such as sponge can be placed at the corner to improve patient comfort.

[0042] Based on this, in this embodiment, to facilitate the adjustment of the angle of the bed board 3, the design is based on existing adjustable hospital beds. The inclined part 2 is hinged to the flat part 1, so the inclined part 2 and the flat part 1 are two separate bed boards 3. The two bed boards 3 are hinged together to form a nursing bed. When the inclined part 2 is not deflected, it can be used as a regular hospital bed. When the inclined part 2 deflects relative to the flat part 1, it can be adapted for traction therapy and nursing. In this embodiment, the support leg 4 connected to the lower end of the inclined part 2 is an electrically retractable support leg 4. Specifically, the lower end of the inclined part 2 is provided with a groove, and a slider is slidably connected in the groove. The upper end of the electrically retractable support leg 4 is hinged to the slider. By adjusting the height of the support leg 4 at the lower end of the inclined part 2, the deflection angle of the inclined part 2 can be adjusted. In actual design, other adjustment angle methods of existing adjustable hospital beds can also be referenced.

[0043] In another embodiment of the present invention, the connecting rope 18 is fixed to the lower part of the vertical part 11. The tension of the connecting rope 18 on the fixing plate 12 is lower and closer to the ankle. Applying tension here can reduce the possibility of the fixing plate 12 detaching due to the toes deflecting towards the foot of the bed. This improves the suitability of this solution for patients with small foot sizes to a certain extent. However, in order to ensure the traction effect and ensure that the patient's foot can abut against the vertical part 11 of the fixing plate 12 and be fixed by the strap 15, this solution is not suitable for patients with excessively small foot sizes.

[0044] The line connecting the connecting rope 18 from the vertical part 11 to the pulley 21 is parallel to the horizontal part 10, thereby ensuring that the traction direction can follow the extension line of the patient's leg, avoiding deviation of the traction direction, and allowing the traction force to be applied better to the patient's leg. This embodiment provides one implementation method. Specifically, the support includes two support rods 20 perpendicular to the surface of the inclined part 2. The pulley 21 is rotatably connected between the two support rods 20. The support rods 20 are slidably connected to the inclined part 2 in a direction perpendicular to the surface of the inclined part 2, or the support rods 20 are extended and retracted in a direction perpendicular to the surface of the inclined part 2, thereby adjusting the position height of the pulley 21 relative to the surface of the inclined part 2. Specifically, the support rods 20 include a vertical rod and a horizontal rod. The pulley 21 is rotatably connected to the horizontal rod, and the vertical rod is connected to the inclined part 2.

[0045] The following description uses the existing electric telescopic pole as an example. After the patient's ankle and foot are fixed on the fixing plate 12, the vertical pole is extended and retracted according to the position of the connecting rope 18 on the fixing plate 12. The height of the pulley 21 is adjusted, and then the position of the connecting rope 18 at the pulley 21 is adjusted to complete the adjustment of the angle of the line connecting the two points of the connecting rope 18.

[0046] Based on this, in this embodiment, to facilitate medical personnel in controlling the angle of the connecting rope 18, a guide rod 19 is fixed to one end of the support rod 20 near the pulley 21. Specifically, the guide rod 19 is fixed to the crossbar, and its position can be adjusted as the support rod 20 moves. A sliding hole is provided on the vertical part 11, and correspondingly, a hole is also provided on the flexible pad 24 at this location. The end of the guide rod 19 is inserted into the sliding hole and slides relative to the sliding hole. When adjusting the height of the pulley 21, as long as the guide rod 19 can be inserted into the sliding hole, it indicates that the height adjustment is accurate. The guide rod 19 can move relative to the fixed plate 12 without affecting the possible movement of the fixed plate 12 after being pulled during traction. The strap 15 is placed between the two sliding holes to avoid affecting the binding.

[0047] In another embodiment of the invention, combined with Figure 2 As shown, the fixing mechanism also includes a limiting plate 6 installed on the nursing bed. Two limiting plates 6 are provided, forming a limiting groove 9 between them for limiting the patient's lower leg and / or thigh. Specifically, the limiting plate 6 is bolted to the bed board 3. The installation position of the limiting plate 6 can be adjusted according to whether the patient's left or right leg requires traction. Of course, in long-term use, some nursing beds can be used only for the left leg, some only for the right leg, or some for both legs, thus eliminating the need to adjust the position of the limiting plate 6 every time a patient uses it. The limiting plate 6 further restricts the patient's leg movement, reducing the possibility of leg movement.

[0048] Based on this, in this embodiment, a plurality of push rods 7 are provided on the limiting plate 6 along its length. The push rods 7 are slidably connected to the limiting plate 6, and a miniature cylinder for driving the push rods 7 to slide is installed on the limiting plate 6. One end of the push rod 7 extends into the limiting groove 9, and the end of the push rod 7 located in the limiting groove 9 is rotatably connected to a roller 8. The rotation axis of the roller 8 and the sliding path of the push rod 7 are perpendicular to each other. A flexible sleeve is provided on the outer wall of the roller 8, and the flexible sleeve can be made of rubber.

[0049] The patient body type suitable for this solution is one whose thigh width can fit between the two limiting plates 6. Although the distance between the two limiting plates 6 can be set, the distance between the two limiting plates 6 should not be too large for the comfort of the patient's other leg on the nursing bed.

[0050] To improve adaptability to patients of different body sizes and ensure proper positioning for both thighs and calves, when the patient's leg is placed in the positioning groove 9, there may be a certain gap between the leg and the positioning plate 6. In this case, the drive rod 7 slides, causing the roller 8 at the end of the push rod 7 to abut against the patient's leg. Multiple rollers 8 on the push rod 7 abut against different positions on the leg, thus providing a degree of leg positioning and reducing leg movement. In practical design, a motor can be installed on the push rod 7 to drive the roller 8, allowing for leg massage through roller rotation and improving patient comfort when the leg remains stationary.

[0051] In another embodiment of the present invention, the medical bandage 15 generally has a certain degree of elasticity and can be slightly deformed to avoid blood flow obstruction when bandaging. However, this may also cause a gap to easily form between the patient's heel and the vertical part 11 of the fixation plate 12 when the fixation plate 12 is subjected to tension, resulting in only the fixation plate 12 being pulled and moved.

[0052] Therefore, in this embodiment, pressure sensors are installed on the side of the first segment 13 and / or the second segment 14 of the strap 15 facing the fixing plate 12. The pressure sensors are conventional resistive flexible film pressure sensors in the prior art, which are pasted or embedded inside the strap 15, especially on the strap 15 near the ankle on the instep of the patient. Straps 15 in other positions can be selected for installation according to cost requirements.

[0053] After the initial bandage 15 is applied, the pressure sensor is located at the patient's ankle. At this time, the initial pressure signal can be detected. If the patient's foot moves, especially if the patient's heel separates from the vertical part 11 of the fixation plate 12, the pressure signal of the pressure sensor located on the instep near the ankle will increase. When the increase exceeds the threshold, medical staff need to intervene to re-bandage, adjust the patient's posture, or adjust the traction setting.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A lower limb traction patient assistance care system, characterized in that, It includes a nursing bed, a fixation mechanism, a traction mechanism, and a control mechanism. The fixation mechanism includes an L-shaped fixation plate and a fixing component installed on the fixation plate. The fixation plate includes a horizontal part and a vertical part. The vertical part is used to abut against the patient's foot, and the horizontal part is used to be placed under the patient's ankle. The fixing component includes a flexible pad that is detachably connected to the inside of the fixation plate and a strap fixed to the flexible pad. The strap is used to fix the patient's ankle and foot to the fixation plate. The traction mechanism includes a bracket installed on the nursing bed, a pulley rotatably connected to the bracket, a mounting frame installed on the nursing bed, a rotating shaft rotatably connected to the mounting frame, and a connecting rope connecting the rotating shaft and the fixing plate. The pulley has an annular groove, and the connecting rope extends from the fixing plate, passes through the annular groove, and is then wound and fixed to the outer wall of the rotating shaft. The control mechanism includes a controller, an alarm, and a tension detection device mounted on the fixed plate. Both the tension detection device and the alarm are connected to the controller via signals. The tension detection device is used to detect the tension applied by the connecting rope to the fixed plate. The signal receiving end of the controller is used to receive the tension signal from the tension detection device. The signal output end of the controller is used to control the rotation of the shaft according to the tension signal. When the controller continuously issues commands to drive the shaft to rotate for a period of time exceeding a threshold, the signal output end of the controller controls the alarm to sound an alarm.

2. The lower limb traction patient assistance care system according to claim 1, characterized in that, The connecting rope is fixed to the lower part of the vertical section, and the line connecting the connecting rope from the vertical section to the pulley is parallel to the horizontal section.

3. The lower limb traction patient assistance system according to claim 1, characterized in that, The surface of the nursing bed includes a flat part and an inclined part, with an obtuse angle between the inclined part and the flat part. The fixing mechanism and the traction mechanism are both installed at the free end of the inclined part.

4. The lower limb traction patient auxiliary care system according to claim 3, characterized in that, The inclined portion is hinged to the flat portion.

5. The lower limb traction patient assistance system according to claim 3, characterized in that, The support includes two rods perpendicular to the surface of the inclined portion, and a pulley is rotatably connected between the two rods; the rods are slidably connected to the inclined portion in a direction perpendicular to the surface of the inclined portion, or the rods are extended and retracted in a direction perpendicular to the surface of the inclined portion.

6. The lower limb traction patient assistance system according to claim 5, characterized in that, A guide rod is fixed to one end of the support rod near the pulley, and a sliding hole is opened on the vertical part. The end of the guide rod is inserted into the sliding hole and slides relative to the sliding hole.

7. The lower limb traction patient assistance care system according to claim 1, characterized in that, The fixing mechanism also includes a limiting plate installed on the nursing bed. There are two limiting plates, and a limiting groove is formed between the two limiting plates for limiting the patient's lower leg and / or thigh.

8. The lower limb traction patient assistance care system according to claim 7, characterized in that, The limiting plate is provided with a plurality of push rods along its length. The push rods are slidably connected to the limiting plate, with one end of the push rod extending into the limiting groove. The end of the push rod located in the limiting groove is rotatably connected to a roller, and the rotation axis of the roller and the sliding path of the push rod are perpendicular to each other.

9. The lower limb traction patient auxiliary care system according to claim 8, characterized in that, The outer wall of the roller is fitted with a flexible sleeve.

10. The lower limb traction patient assistance care system according to claim 1, characterized in that, The straps are provided in multiple sets, and each set of straps includes a first section and a second section respectively fixed on both sides of the flexible pad. The first section and the second section are detachably connected. A pressure sensor is installed on the side of the first section and / or the second section facing the flexible pad.

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