Orthopedic surgery traction bed

Abstract

The present invention provides an orthopedic surgery traction bed, which is connected to an operating bed via a vertical rod, which is connected to a traction frame via a first controllable gas spring, which is connected to an abduction arm via a second controllable gas spring, which is connected to a through-block, in which a long nut and a guide plate are arranged, and in which a screw is arranged. When in use, traction can be implemented by rotating the screw, and the lifting and lowering can be controlled by the first controllable gas spring, and the abduction and adduction can be controlled by the second controllable gas spring. The internal and external rotation of the lower limbs can be controlled by rotating the guide plate, so as to complete resetting, and the lifting and lowering, and the abduction and adduction can be freely regulated, which saves time and labor, is easy to operate, does not affect intraoperative fluoroscopy, and reduces the possibility of surgical incision contamination.

Description

Technical Field

[0001] The invention relates to auxiliary equipment for orthopedic surgery, in particular to a traction bed for orthopedic surgery. Background Art

[0002] For lower limb fractures, especially those in the hip and femur, due to muscle hypertrophy, the fracture ends are often displaced due to muscle traction after fracture. Therefore, heavy traction is generally required before surgery to facilitate fracture reduction during surgery. Secondly, with the deepening of the concept of minimally invasive surgery, intramedullary nail fixation is routinely used. Traction must be maintained during surgery to complete the nail placement. Artificial traction is weak and difficult to maintain for a long time. Therefore, closed intramedullary nail surgery for the hip and femur generally requires the cooperation of a surgical traction bed. Traditional traction beds ( Fig.13 ) is bulky, complicated to install and operate, and labor-intensive (difficult for one person to operate). The traditional traction bed is located at the surgical site (buttocks, under the thigh) and has a complex structure, which affects intraoperative perspective; and there are many connection parts, most of which are located near the surgical site. To adjust the position of the affected limb, multiple knobs need to be loosened / tightened, and the knobs are all set on the side close to the ground. The operator needs to squat / kneel down to operate. If adjustments are required during the operation, the operator has to crawl under the surgical sheet, which may cause contamination. The operation of the traditional traction bed wastes manpower. If the affected limb needs to be raised, one person needs to loosen the fixing screws, and the other person needs to lift the leg up and then tighten the screws. If the patient is heavy and the lower limbs are obviously swollen, more than one person may be needed to lift the legs. During abduction and adduction, one person also needs to squat / kneel down to loosen the fixing screws, and the other person adjusts the traction frame and then tightens the screws. The operation is complicated and labor-intensive (difficult for one person to operate). Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides an orthopedic surgery traction bed, which is easy to operate, does not affect the intraoperative fluoroscopy, and reduces the possibility of surgical incision contamination.

[0004] The present invention is achieved through the following technical solutions:

[0005] An orthopedic surgery traction bed comprises a vertical rod, a traction frame, an abduction arm, a through block, a first controllable gas spring, a second controllable gas spring and a traction boot;

[0006] The proximal end of the vertical rod is used to connect with the operating table, and the distal end of the vertical rod is connected with a first connecting mechanism, which includes a rotating shaft, which is perpendicular to the vertical rod, and the proximal end of the traction frame is rotatably mounted on the rotating shaft, the proximal end of the first controllable gas spring is connected to the lower end of the first connecting mechanism, and the distal end of the first controllable gas spring is connected to the distal end of the traction frame;

[0007] The distal end of the traction frame is hinged to one end of the abduction arm and one end of the second controllable gas spring respectively, the other end of the abduction arm is fixedly connected to the through block on the outside, and the other end of the second controllable gas spring is hinged to the other end of the abduction arm; the abduction arm and the second controllable gas spring can rotate in a horizontal plane;

[0008] A through hole is arranged in the through block along the axial direction of the vertical rod, a long nut is coaxially fixed in the through hole and an arc-shaped guide plate that can rotate around the axis of the through hole is coaxially arranged; the distal end of the guide plate extends out of the through block, and the proximal end extends out of the through block and is fixedly connected to the first connecting column, and the traction shoe is installed on the upper end of the first connecting column; a screw rod is matched in the long nut, the distal end of the screw rod extends out of the through block, and the proximal end of the screw rod is connected to the first connecting column; when the screw rod rotates, it can drive the first connecting column to move between the proximal end and the distal end, and cannot cause the first connecting column to rotate; the projection length of the vertical rod in the horizontal direction is not less than the vertical distance between the first connecting column and the proximal end of the vertical rod in the horizontal direction.

[0009] Preferably, one side of the long nut close to the outward extension arm is fixedly connected to the inner surface of the through block through a transversely arranged second connecting column, and the other side of the long nut is fixedly connected to a transversely arranged third connecting column, and a roller is installed at one end of the third connecting column away from the long nut, the roller is parallel to the axial direction of the long nut, and the outer surface of the roller is in contact with the inner surface of the guide plate.

[0010] Preferably, an inward counterweight protrusion is provided on the edge of the bottom of the guide plate. When the guide plate can rotate freely, the counterweight protrusion is located at the bottom and the first connecting column is in a vertical direction.

[0011] Preferably, a rotary switch is provided on the through-block; a card block is provided on the rotary switch, the card block is a wedge-shaped body, and the card block is located in the through-block. When the rotary switch is closed, the card block is inserted between the through-block and the guide plate through the wedge-shaped surface to limit the rotation of the guide plate; when the rotary switch is turned on, the card block rotates out from between the through-block and the guide plate, and the guide plate can rotate.

[0012] Preferably, the proximal end of the guide plate is an annular structure, and a hollow connecting block is fixedly connected in the middle of the annular structure. The hollow connecting block is a hollow structure, and the hollow part is cylindrical and coaxial with the screw. A circular hole is opened on the side of the hollow connecting block close to the screw, and the hollow connecting block is connected to the cylindrical enlarged screw head at the proximal end of the screw through the circular hole, and the screw head is coaxially placed in the hollow connecting block; the first connecting column is fixedly connected to the side of the hollow connecting block opposite to the screw.

[0013] Preferably, the distal end of the guide plate is a disc with a hole in the middle, a turntable is fixedly connected to the outer circumference of the disc, and a scale is provided on the turntable; a blocking block is fixedly connected to the distal end of the screw rod, and a crank is connected to the other side of the blocking block opposite to the screw rod, the crank extends from the circular hole of the disc at the distal end of the guide plate, and the blocking block is limited at the distal end by a long nut.

[0014] Preferably, the upper end of the first connecting column is sleeved with the traction shoe via a circular groove on the traction shoe, and the traction shoe can rotate around the axis of the first connecting column.

[0015] Preferably, a platform is fixedly connected to the distal end of the traction frame, and a first protrusion, a second protrusion and a screw hole are provided on the upper surface of the platform; one end of the abduction arm is sleeved with the first protrusion, and the other end is fixedly connected to the through block on the outside; one end of the second controllable gas spring is sleeved with the second protrusion, and the other end is hinged to the other end of the abduction arm; a cover plate is installed on the upper surface of the platform through the screw hole, and the cover plate can rotate around the axis of the screw hole, and the cover plate is used to prevent the abduction arm and the second controllable gas spring from escaping from the first protrusion and the second protrusion respectively.

[0016] Preferably, the first connecting mechanism includes a connecting block and a bull horn block; the distal end of the vertical rod is fixedly connected to the connecting block, the connecting block is connected to the bull horn block, a rotating shaft perpendicular to the vertical rod is arranged at the upper end of the bull horn block, and the proximal end of the first controllable gas spring is connected to the lower end of the bull horn block.

[0017] Preferably, the vertical rod is made of carbon fiber material.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] When the device of the present invention is used, traction can be implemented by rotating the screw, the lifting and lowering can be controlled by the first controllable gas spring, the abduction and adduction can be controlled by the second controllable gas spring, and the internal and external rotation of the lower limbs can be controlled by rotating the guide plate, so as to complete the resetting, and the lifting and lowering, abduction and adduction can be freely regulated, which saves time and effort. Therefore, the device of the present invention is simple to use and can be operated by one person. At the same time, the structure below the surgical site of the present invention is simple (only one vertical rod), which does not affect the intraoperative perspective. In the present invention, all operations are located at a position far away from the patient's foot, away from the surgical site, reducing the possibility of contamination of the surgical incision, and the operators are all in a standing position to reduce fatigue and discomfort.

[0020] Furthermore, the counterweight protrusion at the lower end of the guide plate is used to be at the lowest end due to gravity when the rotary switch is turned on, so that the first connecting column is always vertically upward, which is convenient for the installation of the traction shoe.

[0021] Furthermore, the switch for controlling the rotation of the foot in a traditional traction bed is usually located under the heel. When the lower limb needs to be rotated, the switch is first loosened, the foot cover is grasped to rotate the lower limb, and then the switch is tightened to complete the control of the rotation. During the operation, there is still a possibility of contamination due to the proximity to the surgical incision. The present invention achieves control of the rotation of the lower limb through a turntable installed at the far end of the traction bed, reducing the possibility of contamination of the surgical incision.

[0022] Furthermore, the foot cover of the traditional traction bed is fixed to the traction bed, and the patient must be lifted onto the traction bed, with the affected lower limb suspended in the air. One person lifts the leg, and the other person retracts the screw rod, and fixes the foot when the foot cover and the foot are in the right position, which wastes time and manpower. The foot of the present invention is fixed with a detachable brace, which can not only withstand a large traction force, but also can be lifted onto the traction bed after the traction boot is installed on the operating bed or hospital bed, and then the traction boot can be directly installed on the first connecting column, and the traction boot can rotate around the axis of the first connecting column.

[0023] Furthermore, the traditional traction bed is a steel structure that is not X-ray transparent. The vertical rod of the present invention is made of X-ray transparent carbon fiber, which does not affect the intraoperative perspective. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 (a) is a front view of an orthopedic surgery traction bed of the present invention, (b) is a foot cover, and (c) is an upper foot support;

[0025] Figure 2 A top view of a platform in an orthopedic surgery traction bed of the present invention;

[0026] Figure 3 (a) is a side view of a platform in an orthopedic surgery traction bed of the present invention, and (b) is a schematic diagram of the rotation of the cover plate;

[0027] Figure 4 It is a front view of a through block in an orthopedic surgery traction bed of the present invention;

[0028] Figure 5 It is a side view of a hollow connecting block in an orthopedic surgery traction bed of the present invention;

[0029] Figure 6 This is a front view of a turntable and a crank in an orthopedic surgery traction bed of the present invention;

[0030] Figure 7 It is a front view of a connection hole of an operating table connected to an orthopedic operating traction table of the present invention;

[0031] Figure 8 (a) is a top view of a surgical bed connection block in an orthopedic surgical traction bed of the present invention, (b) is a three-dimensional schematic diagram of a second tooth, and (c) is a three-dimensional schematic diagram of a first tooth;

[0032] Fig. 9 (a) is a schematic diagram of the structure of a rotary switch in an orthopedic surgery traction bed of the present invention, (b) is a front view of the rotary switch, and (c) is a three-dimensional schematic diagram of a clamping block;

[0033] Fig.10 It is a side view of a rotary switch in an orthopedic surgery traction bed of the present invention;

[0034] Fig.11 It is a top view of a surgical bed connection block and a vertical rod in an orthopedic surgical traction bed of the present invention;

[0035] Fig.12 Schematic diagrams of the structures of the connecting block and the horn block of the present invention; (a) and (d) are schematic diagrams of the structure of the horn block; (b) and (e) are schematic diagrams of the connection between the connecting block and the vertical rod, and (c) is a schematic diagram of the connection between the connecting block and the horn block;

[0036] Fig.13 This is a schematic diagram of a traditional traction bed.

[0037] In the figure, 1. vertical rod, 2. operating table connecting block, 2-1. first tooth, 2-2. second tooth, 2-3. depth limit block, 2-4. small hole, 3. connecting block, 4. horn block, 5. rotating shaft, 6. traction frame, 7. handle, 8. platform, 8-1. first protrusion, 8-2. second protrusion, 8-3. screw hole, 9. first controllable gas spring, 10. extension arm, 11. through block, 11-1. second connecting column, 11-2. long nut, 11-3. third connecting column, 11- 4. Roller, 12. Guide plate, 12-1. Counterweight protrusion, 13. Screw, 13-1. Screw head, 13-2. Blocking block, 14. Turntable, 15. Crank, 16. Hollow connecting block, 17. First connecting column, 18. Traction boot, 18-1. Groove, 18-2 Buckle, 18-3. Fixing belt, 18-4. Foot cover, 18-5. Upper foot support, 19. Abduction push handle, 20. Second controllable gas spring, 21. Cover plate, 22. Rotary switch, 22-1. Block. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0039] The “proximal end” described in the embodiment of the present invention refers to the end close to the operating table, and the “distal end” refers to the end away from the operating table.

[0040] The traction bed of the present invention comprises a vertical rod 1, a traction frame 6, an abduction arm 10, a through block 11, a first controllable gas spring 9, a second controllable gas spring 20 and a traction shoe 18.

[0041] like Figure 1As shown, when in use, the vertical rod is parallel to the long axis of the operating bed. The proximal end of the vertical rod 1 is fixedly connected to the operating bed connecting block 2, and the operating bed connecting block 2 is used to connect to the operating bed. The distal end of the vertical rod 1 is fixedly connected to the connecting block 3, and the connecting block 3 is connected to the proximal end of the traction frame 6 through the horn block 4; the traction frame 6 is connected to the horn block 4 through the rotating shaft 5 and the first controllable gas spring 9, that is, the upper end of the horn block 4 is provided with a rotating shaft 5 perpendicular to the vertical rod 1, and the proximal end of the traction frame 6 is rotatably installed on the rotating shaft 5, one end of the first controllable gas spring 9 is connected to the lower end of the horn block 4, and the other end of the first controllable gas spring 9 is connected to the distal end of the traction frame 6. The distal end of the traction frame 6 is fixed with a handle 7 and a platform 8. The vertical rod 1 is made of X-ray transparent carbon fiber material. The connecting block 3 is connected to the horn block 4 by a snap buckle, see Fig.12 .

[0042] like Figure 2 , Figure 3 As shown, the upper surface of the platform 8 is provided with a first protrusion 8-1, a second protrusion 8-2 and a screw hole 8-3. One end of the abduction arm 10 is sleeved with the first protrusion 8-1, and the other end is fixedly connected to the through block 11 on the outside; one end of the second controllable gas spring 20 is sleeved with the second protrusion 8-2, and the other end is hinged with the other end of the abduction arm 10, which is used for the abduction and retraction of the abduction arm 10. A cover plate 21 is installed on the platform 8 through the screw hole 8-3. The cover plate 21 is in a trident shape and can be rotated within a range of 60°. It is used to install and remove the abduction arm 10 and the second controllable gas spring 20. When the abduction arm 10 and the second controllable gas spring 20 are respectively sleeved on the first protrusion 8-1 and the second protrusion 8-2, the cover plate 21 is rotated to be located above the abduction arm 10 and the second controllable gas spring 20 to prevent the abduction arm 10 and the second controllable gas spring 20 from coming out of the first protrusion 8-1 and the second protrusion 8-2.

[0043] like Figure 2 and 4 As shown, the side opposite to the side where the through block 11 is fixedly connected to the abduction arm 10 is provided with an abduction push handle 19 and a rotary switch 22. Figure 4 As shown, the through block 11 is a through hollow structure, the cross section of the hollow part is semicircular on the side close to the extension arm 10, and rectangular on the side close to the extension push handle 19. A long nut 11-2 is provided inside the through block 11 along the longitudinal axis center of the through block 11, one side of the long nut 11-2 is connected to the inner surface of the through block 11 close to the extension arm 10 through the second connecting column 11-1, and the other side of the long nut 11-2 is connected to the third connecting column 11-3, and the end of the third connecting column 11-3 away from the long nut (11-2) is installed with a roller 11-4, and the roller 11-4 is parallel to the axial direction of the long nut 11-2, and the roller 11-4 can rotate. A screw 13 is provided inside the long nut 11-2. When abduction is required, the operator holds the abduction push handle with one hand. A controllable gas spring switch is provided on the abduction push handle. The operator presses the switch with his finger and gently pulls the abduction push handle in the direction to be moved. When the abduction arm reaches the designated position, the controllable gas spring switch is released and the abduction arm is fixed at the designated position.

[0044] like Figure 4 As shown, an arc-shaped guide plate 12 is coaxially provided on one side of the through-block 11 near the abduction push handle 19, the middle section of the guide plate 12 is a "G"-shaped structure, the outer surface of the roller 11-4 contacts the inner surface of the guide plate 12, and the roller 11-4 is used to limit and support the guide plate 12. The distal and proximal ends of the guide plate 12 extend out of the through-block 11, and the proximal end of the guide plate 12 is an annular structure, and a hollow connecting block 16 is fixedly connected in the middle of the annular structure. The hollow connecting block 16 is a hollow structure, and the hollow part is cylindrical and coaxial with the screw rod 13. A circular hole is opened on the side of the hollow connecting block 16 near the screw rod 13, and the hollow connecting block 16 is sleeved with the cylindrical expanded screw head 13-1 at the proximal end of the screw rod 13 through the circular hole, and the screw head 13-1 is coaxially placed in the hollow connecting block 16.

[0045] like Figure 4 , Figure 5 A first connecting column 17 is fixedly connected to the side of the hollow connecting block 16 opposite to the screw rod 13. Figure 1 As shown, the upper end of the first connecting column 17 is sleeved with the circular groove 18-1 on the sole of the traction boot 18, and a buckle 18-2 is provided next to the circular groove 18-1 for fixing the first connecting column 17, but the traction boot 18 can rotate around the axis of the first connecting column 17. The traction boot 18 also includes a fixing belt 18-3, a foot cover 18-4 and an upper foot support 18-5. The horizontal projection length of the vertical rod 1 is not less than the vertical distance between the first connecting column 17 and the proximal end of the vertical rod 1 in the horizontal direction.

[0046] like Figure 6 As shown, the distal end of the guide plate 12 is a disk with a hole in the middle, and a rotating disk 14 is fixedly connected to the outer circumference of the disk. The rotating disk 14 is provided with a scale for controlling the rotation of the first connecting column 17. The distal end of the screw rod 13 is connected to a crank 15, which extends from the circular hole of the disk at the distal end of the guide plate 12. The extension and retraction of the screw rod 13 can be controlled by rotating the crank 15. A blocking block 13-2 is provided at the distal end of the screw rod 13, and the blocking block 13-2 is limited at the distal end by the long nut 11-2 to limit the excessive sliding of the screw rod 13 toward the proximal end.

[0047] like Fig. 9 and Fig.10 As shown, the rotary switch 22 is provided with a clamping block 22-1, which is a wedge-shaped body and is located in the through-block 11. The rotary switch 22 can only rotate within a range of 90°. When the rotary switch 22 is turned to the horizontal direction, the clamping block 22-1 is inserted between the through-block 11 and the guide plate 12 through the wedge-shaped surface to limit the rotation of the guide plate 12. When the rotary switch 22 is rotated to the longitudinal direction, the clamping block 22-1 is rotated out from between the through-block 11 and the guide plate 12, and the guide plate 12 can rotate freely.

[0048] like Figure 4As shown, the counterweight protrusion 12 - 1 at the lower end of the guide plate 12 is a counterweight, which is used when the rotary switch 22 is turned on. The counterweight protrusion 12 - 1 is at the lower end due to gravity, so that the first connecting column 17 is always vertically upward, which is convenient for the installation of the traction shoe 18.

[0049] like Figure 7 , Figure 8 and Fig.11 As shown, the operating bed connection block 2 is provided with a first tooth 2-1, a second tooth 2-2 and a depth limit block 2-3, and the second tooth 2-2 is provided with a small hole 2-4. The operating bed is provided with a mounting hole matching the first tooth and the second tooth. The cross section of the first tooth 2-1 is rectangular, and the cross section of the second tooth 2-2 is irregular. The second tooth 2-2 gradually becomes flat from the proximal end to the distal end. After the second tooth 2-2 is inserted into the mounting hole matching the operating bed, the small hole 2-4 matches the elastic bayonet on the operating bed. Because there is an elastic bayonet (such as Figure 7 ), the second tooth can only be set to a shape with a flat front end and a gradually thickened rear end. When inserting, there is no need to pull open the bayonet pin. The first and second teeth can directly enter the matching mounting holes. As they are pushed inward, the bayonet pin enters the small hole 2-4 of the second tooth. When removing the vertical rod, it cannot be pulled out directly. The bayonet pin must be pulled up by hand to remove the vertical rod. The depth limit block 2-3 is used to observe whether the installation depth of the first and second teeth is appropriate. The small hole 2-4 is used to match the elastic bayonet pin in the mounting hole of the operating table to prevent the vertical rod from falling out of the mounting hole.

[0050] The traditional traction bed is a steel structure, heavy and requires the cooperation of multiple people to install. The vertical rod of the present invention is made of X-ray transparent carbon fiber, and other structures are made of aluminum alloy. It is a modular structure, light in weight and easy to install.

[0051] The installation process of the device:

[0052] 1. Insert the operating bed connection block 2 into the mounting hole of the operating bed to complete the installation of the vertical rod 1;

[0053] 2. Connect the traction frame 6 with the horn block 4 to the connecting block 3 at one end of the vertical rod 1, put the two protrusions on both sides of the upper end of the horn block 4 into the two grooves on the upper end of the connecting block 3, and gently press down the traction frame 6. When you hear a "click" sound, it means that the two are locked;

[0054] 3. Rotate the cover plate 21 on the upper surface of the platform 8 to expose the first protrusion 8-1 and the second protrusion 8-2. Select the corresponding left or right abduction arm 10 according to the fracture side. In case of bilateral fracture, the left and right sides can also be installed at the same time. The second controllable gas spring 20 and the through block 11, guide plate 12 and screw 13 connected to the abduction arm 10 are respectively connected to the first protrusion 8-1 and the second protrusion 8-2. Rotate the cover plate 21 again to cover the first protrusion 8-1 and the second protrusion 8-2, thereby preventing the abduction arm 10 and the second controllable gas spring 20 from being separated from the former two.

[0055] The use of the device:

[0056] 1. The traction boot 18 is a detachable structure. Put the foot cover 18-4 on the foot on the surgical side and put it into the traction boot 18, install the foot support 18-5, and fasten the fixing belt 18-3.

[0057] 2. The perineum is pressed against the perineum post, and the circular groove 18 - 1 of the traction boot 18 is connected to the first connecting post 17 .

[0058] 3. Combined with the intraoperative fluoroscopic results, traction can be implemented by rotating the crank 15, the first controllable gas spring 9 controls the lifting and lowering, the second controllable gas spring 20 controls the abduction and adduction, and the rotating turntable 14 controls the internal and external rotation of the lower limbs, thereby completing the reduction.

[0059] The orthopedic surgery traction bed of the present invention has a light structure, adopts modular installation, is easy to adjust, can be operated by one person, realizes multi-directional precise adjustment, and saves time. The device is connected to the operating bed with X-ray transparent carbon fiber material, which does not affect the intraoperative X-ray fluoroscopy. The first controllable gas spring is used at the far end to control the lifting and lowering, and the second controllable gas spring easily controls the adduction and abduction of the limbs. The control button of the controllable gas spring is on the handle, and the traction or shortening is controlled by the rotation of the crank, and the rotation of the dial with a scale controls the internal and external rotation of the limbs. The feet are fixed with a detachable brace, which is convenient to install and easy to operate, saving manpower and time.

Claims

1. An orthopedic surgery traction bed, characterized in that: It comprises a vertical rod (1), a traction frame (6), an extension arm (10), a through block (11), a first controllable gas spring (9), a second controllable gas spring (20) and a traction shoe (18); The proximal end of the vertical rod (1) is used to be connected to the operating table, and the distal end of the vertical rod (1) is connected to a first connecting mechanism, the first connecting mechanism comprises a rotating shaft (5), the rotating shaft (5) is perpendicular to the vertical rod (1), the proximal end of the traction frame (6) is rotatably mounted on the rotating shaft (5), the proximal end of the first controllable gas spring (9) is connected to the lower end of the first connecting mechanism, and the distal end of the first controllable gas spring (9) is connected to the distal end of the traction frame (6); The distal end of the traction frame (6) is hinged to one end of the abduction arm (10) and one end of the second controllable gas spring (20), respectively; the other end of the abduction arm (10) is fixedly connected to the through-block (11) on the outside; the other end of the second controllable gas spring (20) is hinged to the other end of the abduction arm (10); the abduction arm (10) and the second controllable gas spring (20) can rotate in a horizontal plane; A through hole is arranged in the through block (11) along the axial direction of the vertical rod (1), a long nut (11-2) is coaxially fixed in the through hole and an arc-shaped guide plate (12) is coaxially arranged and can rotate around the through hole axis; the distal end of the guide plate (12) extends out of the through block (11), and the proximal end extends out of the through block (11) and is fixedly connected to a first connecting column (17), and a traction shoe (18) is installed on the upper end of the first connecting column (17); a screw rod (13) is matched in the long nut (11-2), the distal end of the screw rod (13) extends out of the through block (11), and the proximal end of the screw rod (13) is connected to the first connecting column (17); when the screw rod (13) rotates, it can drive the first connecting column (17) to move between the proximal end and the distal end, but cannot cause the first connecting column (17) to rotate; the projection length of the vertical rod (1) in the horizontal direction is not less than the vertical distance between the first connecting column (17) and the proximal end of the vertical rod (1) in the horizontal direction.

2. The orthopedic surgery traction bed according to claim 1, characterized in that: A side of the long nut (11-2) close to the extension arm (10) is fixedly connected to the inner surface of the through block (11) via a transversely arranged second connecting column (11-1), and a transversely arranged third connecting column (11-3) is fixedly connected to the other side of the long nut (11-2). A roller (11-4) is installed at an end of the third connecting column (11-3) away from the long nut (11-2), the roller (11-4) is parallel to the axial direction of the long nut (11-2), and the outer surface of the roller (11-4) contacts the inner surface of the guide plate (12).

3. The orthopedic surgery traction bed according to claim 1, characterized in that: An inwardly facing counterweight protrusion (12-1) is arranged at the edge of the bottom of the guide plate (12); when the guide plate (12) can rotate freely, the counterweight protrusion (12-1) is located at the bottom, and the first connecting column (17) is in a vertical direction.

4. The orthopedic surgery traction bed according to claim 1, characterized in that: A rotary switch (22) is provided on the through-block (11); a clamping block (22-1) is provided on the rotary switch (22); the clamping block (22-1) is a wedge-shaped body and is located in the through-block (11); when the rotary switch (22) is closed, the clamping block (22-1) is inserted between the through-block (11) and the guide plate (12) through the wedge-shaped surface to limit the rotation of the guide plate (12); when the rotary switch (22) is opened, the clamping block (22-1) rotates out from between the through-block (11) and the guide plate (12), and the guide plate (12) can rotate.

5. The orthopedic surgery traction bed according to claim 1, characterized in that: The proximal end of the guide plate (12) is an annular structure, and a hollow connecting block (16) is fixedly connected in the middle of the annular structure. The hollow connecting block (16) is a hollow structure, and the hollow part is cylindrical and coaxial with the screw rod (13). A circular hole is opened on the side of the hollow connecting block (16) close to the screw rod (13). The hollow connecting block (16) is sleeved with a cylindrically enlarged screw head (13-1) at the proximal end of the screw rod (13) through the circular hole, and the screw head (13-1) is coaxially arranged in the hollow connecting block (16); the first connecting column (17) is fixedly connected to the side of the hollow connecting block (16) opposite to the screw rod (13).

6. The orthopedic surgery traction bed according to claim 1, characterized in that: The distal end of the guide plate (12) is a disk with a hole in the middle, and a rotating disk (14) is fixedly connected to the outer circumference of the disk, and a scale is arranged on the rotating disk (14); the distal end of the screw rod (13) is fixedly connected to a blocking block (13-2), and the other side of the blocking block (13-2) opposite to the screw rod (13) is connected to a crank (15), and the crank (15) extends from the circular hole of the distal disk of the guide plate (12), and the blocking block (13-2) is limited by the distal end of the long nut (11-2).

7. The orthopedic surgery traction bed according to claim 1, characterized in that: The upper end of the first connecting column (17) is sleeved with the traction shoe (18) through a circular groove (18-1) on the traction shoe (18), and the traction shoe (18) can rotate around the axis of the first connecting column (17).

8. The orthopedic surgery traction bed according to claim 1, characterized in that: A platform (8) is fixedly connected to the far end of the traction frame (6), and a first protrusion (8-1), a second protrusion (8-2) and a screw hole (8-3) are arranged on the upper surface of the platform (8); one end of the extension arm (10) is sleeved with the first protrusion (8-1), and the other end is fixedly connected to the outer side of the through block (11); one end of the second controllable gas spring (20) is sleeved with the second protrusion (8-2), and the other end is hinged to the other end of the extension arm (10); a cover plate (21) is installed on the upper surface of the platform (8) through the screw hole (8-3), and the cover plate (21) can rotate around the axis of the screw hole (8-3), and the cover plate (21) is used to prevent the extension arm (10) and the second controllable gas spring (20) from escaping from the first protrusion (8-1) and the second protrusion (8-2) respectively.

9. The orthopedic surgery traction bed according to claim 1, characterized in that: The first connection mechanism comprises a connection block (3) and a horn block (4); the distal end of the vertical rod (1) is fixedly connected to the connection block (3), the connection block (3) is connected to the horn block (4), a rotating shaft (5) perpendicular to the vertical rod (1) is arranged at the upper end of the horn block (4), and the proximal end of the first controllable gas spring (9) is connected to the lower end of the horn block (4).

10. The orthopedic surgery traction bed according to claim 1, characterized in that: The vertical rod (1) is made of carbon fiber material.

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