Adjustable lower limb bone traction device on sickbed and use method

Abstract

The invention discloses an adjustable lower limb bone traction device on a sickbed and a use method. The adjustable lower limb bone traction device comprises a bed body, a bed tail rail and a traction structure, a lower transverse handrail flush with the top face of the bed body is arranged on the bed tail rail, and a middle transverse handrail located above the lower transverse handrail is arranged on the bed tail rail. The kirschner wire can directly draw leg bones through the kirschner wire, muscles of an affected limb can be drawn in a relaxed state by lifting the affected limb, effective traction treatment of a fracture part is promoted, and the kirschner wire can be promoted to perform relative back-and-forth traction movement in the traction process, so that the fracture part is effectively treated. The situation that the overall traction effect is poor due to the static traction process in the prior art is avoided, and therefore the traction effect is better; when turning over is needed, the gradient between the upper frame and the lower frame can be changed by adjusting the telescopic structure of the upper frame, so that pain and vascular nerve re-injury are relieved, local swelling fading is promoted, and it is guaranteed that the overall using effect is better.

Description

Technical Field

[0001] This invention relates to the field of medical tool technology, and in particular to an adjustable lower limb skeletal traction device for use in a hospital bed and its method of use. Background Technology

[0002] Skeletal traction is one of the treatment methods used in orthopedics for fracture reduction and fixation, as well as many other orthopedic diseases. For patients unsuitable for surgery, traction can also achieve therapeutic goals. For patients with lower leg fractures or other lower limb disorders, difficulty in lower limb movement and prolonged maintenance of a single posture are detrimental to lower limb rehabilitation and can easily lead to joint stiffness, muscle spasms, and even skin necrosis. Clinically, traction frames are often used to assist in the rehabilitation of these patients' lower limbs. Since not all patients need traction devices, installing traction devices at every bedside is not only costly but also inconvenient for patients who do not require traction and for those providing medical services.

[0003] In practice, skeletal traction involves directly pulling on the bone using Kirschner wires, thereby effectively reducing and fixing fractures and dislocations. It serves three main purposes: treating trauma, orthopedic diseases, and assisting in surgical treatment; other techniques cannot completely replace it. The Brownian traction frame is a traction treatment tool used by orthopedic patients to elevate the lower limb and for lower limb fractures. This frame acts as a fixed support for traction, placing the affected limb in a functional position where muscles can be relaxed for traction. By elevating the affected limb, the patient's body slides in the opposite direction of the traction force, generating a counter-traction force to achieve reduction and fixation. Traditional Brownian traction frames have a simple structure, consisting of a degreased bandage wrapped around the support surface, with the affected limb placed on the support surface for traction. Foam pads are also commonly used clinically to assist traction. Unlike the Brownian frame, these are internally filled with foam and externally covered with a leather dressing, making them easier to clean but less breathable and prone to accumulating sweat.

[0004] However, the use of traction in ICU patients presents several challenges. Prolonged immobilization can lead to discomfort and pressure sores; regular adjustments are necessary; and excessive or insufficient traction force can negatively impact effectiveness. Patients undergoing skeletal traction in the ICU face numerous problems, including: pressure marks from the traction rope; the traction frame's inability to be fixed in bed, affecting traction effectiveness; the inability to adjust the size and incline of the traction device, leaving the groin unsupported, reducing comfort, and increasing the risk of vascular and nerve damage due to fracture angle inward bending; limb slippage, hindering effective traction; and the prevalence of static traction in current procedures further complicates the overall traction effect, preventing the achievement of optimal results. These issues make traction rehabilitation treatment difficult and prone to causing secondary injuries. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes an adjustable lower limb traction device and its usage method in a hospital bed.

[0006] The present invention provides an adjustable lower limb traction device for hospital beds, comprising a bed frame, a bed end rail, and a traction structure;

[0007] The bed foot rail is equipped with a lower horizontal rail that is flush with the top surface of the bed, a middle horizontal rail that is above the lower horizontal rail, and an upper horizontal rail that is above the middle horizontal rail.

[0008] The traction structure includes a lower frame, an upper frame, and a traction frame. The lower frame is located on the bed, and one end of the lower frame is fixed to the lower cross rail. The upper frame is located above the lower frame, and one end of the upper frame is fixed to the middle cross rail. The traction frame is located above the upper frame. A pulley frame is fixed to the upper cross rail by locking bolts. A traction pulley is rotatably mounted on the pulley frame, and a traction rope is driven onto the traction pulley. One end of the traction rope is connected to the traction frame. A Kirschner wire is installed on the traction frame, and the traction frame is fixed to the patient's lower leg by the Kirschner wire. The other end of the traction rope is located on the bed. The outer side is connected to a traction block; a vertical support frame is provided between the upper frame and the lower frame, the top of the vertical support frame is fixedly connected to an upper sliding ring fitted on the upper frame, and the bottom of the vertical support frame is fixedly connected to a lower sliding ring fitted on the lower frame; both rods of the upper frame and the bed body in the same direction are provided with telescopic structures, the upper sliding ring is located on the rod of the upper frame and the bed body in the same direction; the lower sliding ring is located on the rod of the lower frame and the bed body in the same direction; a nursing pad is fixedly provided on the upper frame, and the end of the lower frame away from the bed end rail extends beyond the end of the upper frame away from the bed end rail;

[0009] A rotating bracket is rotatably connected to the bottom right side of the pulley frame, and a guide wheel for auxiliary transmission of the traction rope is rotatably mounted on the rotating bracket; a vertical frame is fixedly connected to the bottom end of the pulley frame, and an inclined rotating support column is fixedly installed on the bottom right side of the vertical frame. A linkage rod is movably sleeved at the inclined top of the rotating support column through a drive mechanism. A slider is rotatably mounted at the top of the linkage rod. A slide rail is provided on the bottom side of the rotating bracket, and the slider is slidably mounted on the slide rail.

[0010] Preferably, the driving mechanism includes a sleeve cavity disposed on a rotating support column, a movable plate movably connected within the sleeve cavity, and the bottom end of a linkage rod fixedly connected to the movable plate; a drive motor is fixedly installed in the sleeve cavity located below the movable plate, and a bidirectional cam is fixedly sleeved on the output shaft of the drive motor, the bidirectional cam being rolledly connected to the bottom side of the movable plate; a return spring sleeved on the linkage rod is fixedly connected between the movable plate and the top inner wall of the sleeve cavity; guide balls are rolledly installed on both sides of the movable plate, and a groove is provided on the side wall of the sleeve cavity, with the guide balls rolling within the groove along the length direction of the linkage rod.

[0011] Preferably, the telescopic structure includes a fixed inner tube and a movable outer tube, the movable outer tube being sleeved on the fixed inner tube, the fixed inner tube having a fixing through hole, and the movable outer tube having a plurality of adjustable holes, the fixing through hole and the adjustable holes being fixed by locking bolts.

[0012] Preferably, the lower frame and the upper frame are fixed with an inclined restraint frame on the side away from the foot rail of the bed, and restraint straps are connected to the top two sides of the restraint frame, with the restraint straps pressing on the patient's thighs.

[0013] Preferably, the vertical support frame is located at the end away from the foot rail of the bed; the nursing pad is a gel nursing pad.

[0014] Preferably, the upper frame is provided with right-angle threaded joints at all four corners, and the rod parts at the corners of the upper frame are threadedly connected to the right-angle threaded joints. The lower frame is provided with right-angle threaded joints at all four corners, and the rod parts at the corners of the lower frame are threadedly connected to the right-angle threaded joints.

[0015] Preferably, the upper frame rests on top of the middle horizontal railing, and the upper frame and the middle horizontal railing are fixed together by a C-type buckle and a locking bolt; the lower frame rests on top of the lower horizontal railing, and the lower frame and the lower horizontal railing are fixed together by a C-type buckle and a locking bolt.

[0016] A method for using an adjustable lower limb skeletal traction device in a hospital bed includes the following steps:

[0017] Step 1: Install a lower horizontal rail, a middle horizontal rail, and an upper horizontal rail on the foot of the bed.

[0018] Step 2: Install the lower frame and adjust the telescopic structure so that the length of the lower frame reaches the set position;

[0019] Step 3: Install the upper frame and adjust the telescopic structure so that the length of the lower frame reaches the set position;

[0020] Step 4: Install the traction pulley, traction rope, traction frame, traction block, and guide rope wheel;

[0021] Step 5: Use the traction block for traction, and use the traction rope, traction frame, and Kirschner wires to traction the patient's lower leg. The lower leg is placed on the nursing pad, and the thigh is positioned between the upper and lower frames away from the end of the bed rail, and is secured with a restraint strap. During traction, the drive motor drives the bidirectional cam to rotate, causing the movable plate and linkage rod to move up and down. This causes the rotating bracket and guide rope wheel to rotate and swing back and forth based on the transfer part of the pulley frame, so that the traction rope on the guide rope wheel moves up and down. The traction rope drives the traction frame and Kirschner wires to pull the patient's lower leg and the traction block to reciprocate.

[0022] Step 6: When turning over and skin care is needed, adjust the telescopic structure of the upper frame so that the fixing holes correspond to and are fixed with other adjustable holes, which can realize the slope adjustment between the upper and lower frames.

[0023] The beneficial effects of this invention are:

[0024] 1. In this invention, an adjustable lower limb skeletal traction device is provided and integrated into the hospital bed. At the same time, the affected limb is tractioned by Kirschner wires fixed to the iliac bone. Since the traction pulley is set on the hospital bed, the limb is prevented from sliding down, causing the traction block to fall to the ground and thus failing to provide effective traction. Meanwhile, the upper frame and lower frame are placed on the bed foot rail and fixed by C-type buckles, which makes the overall stability higher and the connection better.

[0025] 2. In this invention, when turning over and skin care are required, the slope between the upper and lower frames can be changed by adjusting the retractable structure of the upper frame, which helps to reduce pain and re-injury to blood vessels and nerves, and promotes the reduction of local swelling.

[0026] 3. In this invention, by setting a retractable structure on the lower frame, the overall position on the hospital bed can also be adjusted to meet the needs of patients of different heights.

[0027] 4. In this invention, by setting restraint frames on both sides of the restraint frame, and connecting restraint straps to the top of the restraint frames on both sides, the restraint straps are pressed on the thighs, thereby achieving restraint of the lower limbs. This can prevent the patient's limbs from falling off the support, prevent the fracture site from bending inward at an angle, and reduce the probability of vascular and nerve damage.

[0028] 5. In this invention, not only is the leg bone directly tractioned via Kirschner wires, but the muscles of the affected limb are also tractioned in a relaxed state by elevating the affected limb, promoting effective traction treatment of the affected area. Furthermore, the traction rope can be moved up and down during traction, allowing the patient's lower leg, which is tractioned by the traction frame and Kirschner wires, to undergo relative reciprocating traction movements. This avoids the situation where the overall traction effect is poor due to static traction in the past, thus making the leg traction effect better. In addition, when turning over and skin care are required, the slope between the upper and lower frames can be changed by adjusting the retractable structure of the upper frame to reduce pain and re-injury to blood vessels and nerves, promote the reduction of local swelling, and ensure better overall use effect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an adjustable lower limb traction device for hospital beds proposed in this invention;

[0030] Figure 2 This is a partial structural schematic diagram of the present invention;

[0031] Figure 3 For the present invention Figure 1 Enlarged structural diagram of part A in the middle;

[0032] Figure 4 This is a cross-sectional view of the rotating support column of the present invention.

[0033] Figure 5 This is an exploded view of the retractable structure in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the upper and lower frames according to an embodiment of the present invention.

[0035] In the diagram: 1. Bed frame; 2. Foot rail; 21. Lower horizontal rail; 22. Middle horizontal rail; 23. Upper horizontal rail; 3. Traction structure; 31. Lower frame; 32. Upper frame; 33. Traction frame; 34. Traction pulley; 341. Pulley frame; 35. Traction rope; 36. Traction block; 37. Vertical support frame; 38. Upper sliding ring; 39. Lower sliding ring; 310. Kirschner wire; 4. Telescopic structure; 41. Fixed inner tube; 42. Movable outer tube; 43. Fixed perforation; 44. Adjustable Hole; 45. Locking bolt II; 5. Nursing pad; 6. Restraint frame; 7. Restraint strap; 8. Right angle threaded connector; 9. C-type buckle; 10. Locking bolt III; 11. Rotating support column; 1101. Sleeve cavity; 1102. Drive motor; 1103. Bidirectional cam; 1104. Movable plate; 1105. Linkage rod; 1106. Return spring; 1107. Slider; 1108. Guide ball; 12. Rotating bracket; 13. Guide rope wheel; 14. Stand; 15. Slide rail. Detailed Implementation

[0036] The present invention will be further explained below with reference to specific embodiments.

[0037] Example

[0038] refer to Figure 1-6 This embodiment proposes an adjustable lower limb traction device for hospital beds, including a bed body 1, a bed end rail 2, and a traction structure 3;

[0039] See Figure 1 In the middle, the foot rail 2 is provided with a lower horizontal rail 21 that is flush with the top surface of the bed frame 1, the foot rail 2 is provided with a middle horizontal rail 22 located above the lower horizontal rail 21, and the foot rail 2 is provided with an upper horizontal rail 23 located above the middle horizontal rail 22.

[0040] See Figure 1-6In the traction structure 3, a lower frame 31, an upper frame 32, and a traction frame 33 are included. The lower frame 31 is located on the bed body 1, and one end of the lower frame 31 is fixed to the lower horizontal rail 21. The upper frame 32 is located above the lower frame 31, and one end of the upper frame 32 is fixed to the middle horizontal rail 22. The traction frame 33 is located above the upper frame 32. A pulley frame 341 is fixed to the upper horizontal rail 23 by a locking bolt. A traction pulley 34 is rotatably mounted on the pulley frame 341. A traction rope 35 is driven on the traction pulley 34. One end of the traction rope 35 is connected to the traction frame 33. A Kirschner wire 310 is provided on the traction frame 33, and the traction frame 33 is fixed to the patient's lower leg by the Kirschner wire 310. The other end of the traction rope 35 is... The upper frame 32 is located on the outside of the bed body 1 and is connected to a traction block 36. A vertical support frame 37 is provided between the upper frame 32 and the lower frame 31. The top of the vertical support frame 37 is fixedly connected to an upper sliding ring 38 that is sleeved on the upper frame 32, and the bottom of the vertical support frame 37 is fixedly connected to a lower sliding ring 39 that is sleeved on the lower frame 31. A telescopic structure 4 is provided on two rods of the upper frame 32 that are in the same direction as the length of the bed body 1. The upper sliding ring 38 is located on the rod of the upper frame 32 that is in the same direction as the length of the bed body 1. The lower sliding ring 39 is located on the rod of the lower frame 31 that is in the same direction as the length of the bed body 1. A nursing pad 5 is fixedly provided on the upper frame 32. The end of the lower frame 31 away from the bed end rail 2 extends beyond the end of the upper frame 32 away from the bed end rail 2.

[0041] See Figure 1 , Figure 3 In the middle, a rotating bracket 12 is rotatably connected to the bottom right side of the pulley frame 341. A guide wheel 13 for auxiliary transmission of the traction rope 35 is rotatably mounted on the rotating bracket 12. A vertical frame 14 is fixedly connected to the bottom end of the pulley frame 341. An inclined rotating support column 11 is fixedly installed on the bottom right side of the vertical frame 14. A linkage rod 1105 is movably sleeved on the inclined top end of the rotating support column 11 through a drive mechanism. A slider 1107 is rotatably mounted on the top end of the linkage rod 1105. A slide rail 15 is provided on the bottom side of the rotating bracket 12. The slider 1107 is slidably mounted on the slide rail 15.

[0042] See Figure 3-4In the drive mechanism, there is a sleeve cavity 1101 on the rotating support column 11. A movable plate 1104 is movably connected in the sleeve cavity 1101. The bottom end of the linkage rod 1105 is fixedly connected to the movable plate 1104. A drive motor 1102 is fixedly installed in the sleeve cavity 1101 located below the movable plate 1104. A bidirectional cam 1103 is fixedly sleeved on the output shaft of the drive motor 1102. The bidirectional cam 1103 is tumblingly connected to the bottom side of the movable plate 1104. A return spring 1106 sleeved on the linkage rod 1105 is fixedly connected between the movable plate 1104 and the top inner wall of the sleeve cavity 1101. Guide balls 1108 are tumblingly installed on both sides of the movable plate 1104. A groove is provided on the side wall of the sleeve cavity 1101. The guide balls 1108 are tumblingly disposed in the groove along the length direction of the linkage rod 1105.

[0043] See Figure 5 In the telescopic structure 4, there are a fixed inner tube 41 and a movable outer tube 42. The movable outer tube 42 is sleeved on the fixed inner tube 41. The fixed inner tube 41 is provided with a fixed through hole 43. The movable outer tube 42 is provided with a number of adjustable holes 44. The fixed through hole 43 and the adjustable holes 44 are fixed by locking bolts 45.

[0044] See Figure 1-2 In the middle, the lower frame 31 and the upper frame 32 are fixed with inclined restraint frames 6 on the side away from the foot rail 2. The top two sides of the restraint frame 6 are connected with restraint straps 7, which are pressed on the patient's thighs. The vertical support frame 37 is set at the end away from the foot rail 2. The nursing pad 5 is a gel nursing pad 5.

[0045] See Figure 6 In the middle, the four corners of the upper frame 32 are provided with right-angle threaded joints 8, and the rod parts at the corners of the upper frame 32 are threadedly connected to the right-angle threaded joints 8. The four corners of the lower frame 31 are provided with right-angle threaded joints 8, and the rod parts at the corners of the lower frame 31 are threadedly connected to the right-angle threaded joints 8.

[0046] See Figure 1 , Figure 2 , Figure 6 In the middle, the upper frame 32 rests on top of the middle horizontal railing 22, and the upper frame 32 and the middle horizontal railing 22 are connected and fixed together by C-type buckles 9 and locking bolts 3 10; the lower frame 31 rests on top of the lower horizontal railing 21, and the lower frame 31 and the lower horizontal railing 21 are connected and fixed together by C-type buckles 9 and locking bolts 3 10.

[0047] A method for using an adjustable lower limb skeletal traction device in a hospital bed includes the following steps:

[0048] Step 1: Install the lower horizontal rail 21, the middle horizontal connecting bar, and the upper horizontal rail 23 on the foot rail 2 of the bed;

[0049] Step 2: Install the lower frame 31 and adjust the telescopic structure 4 so that the length of the lower frame 31 reaches the set position;

[0050] Step 3: Install the upper frame 32 and adjust the telescopic structure 4 so that the length of the lower frame 31 reaches the set position;

[0051] Step 4: Install the traction pulley 34, traction rope 35, traction frame 33, traction block 36, and guide rope wheel 13;

[0052] Step 5: Use the traction block 36 for traction, and use the traction rope 35, traction frame 33 and Kirschner wire 310 to traction the patient's lower leg; the lower leg is placed on the nursing pad 5, and the thigh is located between the upper frame 32 and the lower frame 31 at the end away from the end rail 2, and the thigh is pressed tightly by the restraint strap 7; during traction, the drive motor 1102 drives the bidirectional cam 1103 to rotate, causing the movable plate 1104 and the linkage rod 1105 to move up and down, causing the rotating bracket 12 and the guide rope wheel 13 to rotate and swing back and forth based on the transfer part of the pulley frame 341, so that the traction rope 35 on the guide rope wheel 13 moves up and down to pull. The traction rope 35 drives the traction frame 33 and Kirschner wire 310 to pull the patient's lower leg and the traction block 36 to reciprocate.

[0053] Step 6: When turning over and skin care is required, adjust the retractable structure 4 of the upper frame 32 so that the fixing hole 43 corresponds to and is fixed with other adjustable holes 44, so that the slope between the upper frame 32 and the lower frame 31 can be adjusted.

[0054] In summary, this invention uses a combination of traction block (36), traction rope 35, traction frame 33, and Kirschner wire 310 to traction the patient's lower leg. The Kirschner wire 310 directly tractions the leg bones, which can effectively reduce and fix fractures and dislocations. By elevating the affected limb, the muscles of the affected limb can be tractioned in a relaxed state, promoting effective traction treatment of the affected area. During traction, the drive mechanism can also be used to make the traction rope 35 on the guide rope wheel 13 move up and down, thereby allowing the patient's lower leg tractioned by the traction frame 33 and Kirschner wire 310 to move back and forth, avoiding the situation where the overall traction effect is poor due to the static traction process in the past, thus making the leg traction effect better. In addition, when it is necessary to turn over and care for the skin, the slope between the upper and lower frames can be changed by adjusting the retractable structure of the upper frame, which can reduce pain and vascular nerve re-injury, promote the reduction of local swelling, and ensure better overall use effect.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adjustable lower limb skeletal traction device for hospital beds, characterized in that, It includes the bed frame (1), the foot rail (2), and the traction structure (3); The bed end rail (2) is provided with a lower horizontal rail (21) that is flush with the top surface of the bed body (1), the bed end rail (2) is provided with a middle horizontal rail (22) located above the lower horizontal rail (21), and the bed end rail (2) is provided with an upper horizontal rail (23) located above the middle horizontal rail (22). The traction structure (3) includes a lower frame (31), an upper frame (32), and a traction frame (33). The lower frame (31) is located on the bed (1), and one end of the lower frame (31) is fixed to the lower horizontal rail (21). The upper frame (32) is located above the lower frame (31), and one end of the upper frame (32) is fixed to the middle horizontal rail (22). The traction frame (33) is located above the upper frame (32). A pulley frame (341) is fixed to the upper horizontal rail (23) by a locking bolt. A traction pulley (34) is rotatably mounted on the pulley frame (341). A traction rope (35) is driven on the traction pulley (34). One end of the traction rope (35) is connected to the traction frame (33). A Kirschner wire (310) is provided on the traction frame (33), and the traction frame (33) is fixed to the patient's lower leg by the Kirschner wire (310). The other end of the traction rope (35) is... One end is located on the outside of the bed body (1) and connected to a traction block (36); a vertical support frame (37) is provided between the upper frame (32) and the lower frame (31), the top of the vertical support frame (37) is fixedly connected to an upper sliding ring (38) sleeved on the upper frame (32), and the bottom of the vertical support frame (37) is fixedly connected to a lower sliding ring (39) sleeved on the lower frame (31); a telescopic structure (4) is provided on two rods of the upper frame (32) and the bed body (1) in the same direction of length, the upper sliding ring (38) is located on the rod of the upper frame (32) and the bed body (1) in the same direction of length; the lower sliding ring (39) is located on the rod of the lower frame (31) and the bed body (1) in the same direction of length, a nursing pad (5) is fixedly provided on the upper frame (32), and the end of the lower frame (31) away from the bed end rail (2) extends beyond the end of the upper frame (32) away from the bed end rail (2); The pulley frame (341) is rotatably connected to a rotating bracket (12) on the bottom right side. A guide wheel (13) for auxiliary transmission of the traction rope (35) is rotatably installed on the rotating bracket (12). A stand (14) is fixedly connected to the bottom end of the pulley frame (341). An inclined rotating support column (11) is fixedly installed on the bottom right side of the stand (14). A linkage rod (1105) is movably sleeved on the inclined top end of the rotating support column (11) through a drive mechanism. A slider (1107) is rotatably mounted on the top end of the linkage rod (1105). A slide rail (15) is provided on the bottom side of the rotating bracket (12). The slider (1107) is slidably mounted on the slide rail (15).

2. The adjustable lower limb skeletal traction device for hospital beds according to claim 1, characterized in that, The driving mechanism includes a socket (1101) disposed on a rotating support (11), a movable plate (1104) movably connected inside the socket (1101), and the bottom end of a linkage rod (1105) fixedly connected to the movable plate (1104); a drive motor (1102) is fixedly installed inside the socket (1101) located below the movable plate (1104), and a bidirectional cam (1103) is fixedly sleeved on the output shaft of the drive motor (1102). 1103) is rolled to the bottom side of the movable plate (1104); a return spring (1106) sleeved on the linkage rod (1105) is fixedly connected between the movable plate (1104) and the top inner wall of the sleeve cavity (1101); guide balls (1108) are rolled on both sides of the movable plate (1104), and a groove is provided on the side wall of the sleeve cavity (1101), and the guide balls (1108) are rolled in the groove along the length direction of the linkage rod (1105).

3. The adjustable lower limb skeletal traction device for hospital beds according to claim 1, characterized in that, The retractable structure (4) includes a fixed inner tube (41) and a movable outer tube (42). The movable outer tube (42) is fitted onto the fixed inner tube (41). The fixed inner tube (41) is provided with a fixed through hole (43). The movable outer tube (42) is provided with a plurality of adjustable holes (44). The fixed through hole (43) and the adjustable holes (44) are fixed by locking bolts (45).

4. The adjustable lower limb traction device for hospital beds according to claim 1, characterized in that, The lower frame (31) and upper frame (32) are fixed with an inclined restraint frame (6) on the side away from the bed end rail (2). The top two sides of the restraint frame (6) are connected with restraint straps (7), which press on the patient's thighs.

5. The adjustable lower limb skeletal traction device for hospital beds according to claim 1, characterized in that, The vertical support frame (37) is located at the end away from the foot rail (2); the nursing pad (5) is a gel nursing pad (5).

6. The adjustable lower limb skeletal traction device for hospital beds according to claim 1, characterized in that, The upper frame (32) is provided with right-angle threaded joints (8) at all four corners, and the rod parts at the corners of the upper frame (32) are threadedly connected to the right-angle threaded joints (8). The lower frame (31) is provided with right-angle threaded joints (8) at all four corners, and the rod parts at the corners of the lower frame (31) are threadedly connected to the right-angle threaded joints (8).

7. The adjustable lower limb skeletal traction device for hospital beds according to claim 1, characterized in that, The upper frame (32) rests on top of the middle horizontal railing (22), and the upper frame (32) and the middle horizontal railing (22) are connected and fixed together by C-type buckles (9) and locking bolts (10); the lower frame (31) rests on top of the lower horizontal railing (21), and the lower frame (31) and the lower horizontal railing (21) are connected and fixed together by C-type buckles (9) and locking bolts (10).

8. The method of using an adjustable lower limb skeletal traction device on a hospital bed according to claim 1, characterized in that, Includes the following steps: Step 1: Install the lower horizontal rail (21), the middle horizontal connecting bar and the upper horizontal rail (23) on the foot rail (2); Step 2: Install the lower frame (31) and adjust the telescopic structure (4) so ​​that the length of the lower frame (31) reaches the set position; Step 3: Install the upper frame (32) and adjust the telescopic structure (4) so ​​that the length of the lower frame (31) reaches the set position; Step 4: Install the traction pulley (34), traction rope (35), traction frame (33), traction block (36), and guide rope wheel (13); Step 5: Use the traction block (36) for traction, and use the traction rope (35), traction frame (33) and Kirschner wire (310) to traction the patient's lower leg; the lower leg is placed on the nursing pad (5), and the thigh is located between the upper frame (32) and the lower frame (31) away from the end of the bed rail (2) and is pressed tightly by the restraint strap (7); during traction, the drive motor (1102) is used to drive the bidirectional cam (1103) to rotate, so that the movable plate (1104) and the linkage rod (1105) move up and down, causing the rotating bracket (12) and the guide rope wheel (13) to rotate and swing back and forth based on the transfer part of the pulley frame (341), so that the traction rope (35) on the guide rope wheel (13) performs up and down traction activities, and the traction rope (35) drives the traction frame (33) and Kirschner wire (310) to pull the patient's lower leg and the traction block (36) to reciprocate traction movements; Step 6: When turning over and skin care is required, adjust the telescopic structure (4) of the upper frame (32) so that the fixing hole (43) corresponds to and is fixed with other adjustable holes (44), so that the slope between the upper frame (32) and the lower frame (31) can be adjusted.

Images