First-aid fixing device for limb fracture trauma

Abstract

The invention discloses a limb fracture trauma first-aid fixing device which comprises a supporting frame, a cylindrical rod, a circular hole plate, a telescopic rod and an arc-shaped clamping plate, accurate fixing of a limb of a patient is achieved through a clamping mechanism, the arc-shaped clamping plate can stably clamp or release the limb through cooperation of a worm gear, a worm and a cylindrical block, and the limb fracture trauma first-aid fixing device is convenient to use. The traction mechanism pulls round hole plates to move oppositely through a fixing base, an adjusting rod and a reset spring, limb skin is tightened, skin tension is reduced, the stability of the fixing device is improved, the filling mechanism flexibly supports the inner walls of arc-shaped clamping plates through an air bag, a Y-shaped pipe and a piston plate, compression on the skin is relieved, meanwhile, friction force is enhanced, and the fixing device is more stable. Through the synergistic effect of the clamping mechanism, the traction mechanism and the filling mechanism, the limb surface skin tension of the patient is effectively reduced, the stability of the fixing device and the comfort of the patient are improved, and the fixing device is suitable for various first-aid scenes.

Description

Technical Field

[0001] This invention relates to the field of limb fracture trauma emergency fixation technology, specifically a limb fracture trauma emergency fixation device. Background Technology

[0002] Limb fractures are a common type of trauma in clinical practice, especially in accidents such as traffic accidents, sports injuries, and falls from heights. In emergency situations, rapid and effective immobilization of the fracture site is crucial. Immobilization not only prevents further displacement of the fracture fragments and avoids further damage to surrounding blood vessels, nerves, and other tissues, but also effectively reduces the patient's pain, creating favorable conditions for subsequent treatment.

[0003] A Chinese patent with publication number CN118436466A includes multiple fixing plates, which are rotatably connected to each other via connecting blocks. Each of the opposite ends of the connecting blocks is fixedly connected to a wire loop a, and a steel wire a passes through each of the multiple wire loops a on both sides. Each of the opposite ends of the upper front fixing plates is fixedly connected to a base, wherein the top of the upper fixing plate is fixedly connected to two bases, and the bottom of the lower fixing plate is fixedly connected to one base. Each of the three bases is rotatably connected to multiple rotating blocks on the side away from the fixing plates.

[0004] When the above-mentioned device is in use, the upper and lower fixing plates are brought together by winding the steel wire a, and then the limb is clamped by the fixing plates to achieve fixation. The fixing plates are bent as a whole by winding the upper or lower steel wire a to adapt to changes at the joint. However, in actual use, because the skin on the surface of the limb is relatively loose and has greater tension, the fixation device is prone to shaking, which can cause further displacement of the fracture ends and cause secondary injury to the patient. Therefore, it is difficult to reduce the tension of the skin on the surface of the patient's limb.

[0005] Therefore, we propose an emergency fixation device for limb fracture trauma. Summary of the Invention

[0006] The purpose of this invention is to provide an emergency fixation device for limb fractures, which has the advantages of reducing skin tension on the patient's limb and improving the stability of the fixation device, thus solving the problems in the prior art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a limb fracture trauma emergency fixation device, comprising a support frame, wherein cylindrical rods are symmetrically connected to both sides of the support frame, and circular perforated plates are horizontally movably connected to both ends of the cylindrical rods on both sides, which are fitted onto the limbs at both ends of the fracture site. Each circular perforated plate has multiple annular arrayed telescopic grooves on its inner wall, and a telescopic rod is telescopically movably connected to the inner wall of each telescopic groove. An arc-shaped clamping plate for clamping and fixing the patient's limb is fixedly connected to the end of each telescopic rod away from the telescopic groove. The circular perforated plate is provided with a fixation mechanism for clamping or releasing the arc-shaped clamping plate and a traction mechanism for pulling the circular perforated plate to move in opposite directions and tightening the limb skin.

[0008] Preferably, the fixing mechanism includes a worm gear rotatably connected to the outer contour of one of the circular perforated plates, and fixing blocks fixedly connected at symmetrical positions on both sides of the circular perforated plate near one end of the worm gear. A worm driven by a power mechanism is rotatably connected through the fixing blocks on both sides, and the worm meshes with the tooth grooves on the outer contour of the fixing blocks.

[0009] Preferably, on the opposite surfaces of the ends of the telescopic rods away from the arc-shaped clamp, cylindrical blocks are fixedly connected for the worm gear to drive the telescopic rods to reciprocate. Each circular perforated plate has a support groove at the corresponding position of the cylindrical block for the telescopic rod to drive the cylindrical block to move synchronously. Each worm gear has an arc-shaped groove at the corresponding position of the cylindrical block for pulling the arc-shaped clamp to clamp or release the patient's limb. The cylindrical blocks near the end of the worm gear are respectively connected to the inner wall of the adjacent arc-shaped groove.

[0010] Preferably, the cylindrical block is provided with an auxiliary mechanism for the worm gear to drive the arc-shaped clamping plates at both ends to clamp or release synchronously. The auxiliary mechanism includes cylindrical shells fixedly connected to the cylindrical blocks near the worm gear end. The inner wall of each cylindrical shell away from the worm gear end is penetrated and movably connected with a fixed rod for axial reciprocating movement. The end of each fixed rod away from the cylindrical shell is fixedly connected to the cylindrical block at the adjacent end.

[0011] Preferably, the pulling mechanism includes a fixed seat fixedly connected to the support frame, and two adjusting rods rotatably connected to both sides of the fixed seat, which pull the circular perforated plates at both ends to move horizontally back and forth in opposite directions. The ends of the two adjusting rods away from the fixed seat are respectively rotatably connected to the cylindrical shell and the fixed rod at the adjacent end.

[0012] Preferably, each of the two cylindrical rods is fitted with a reset spring that guides the circular perforated plate to move horizontally back to its original position. Each reset spring is fixedly connected at both ends to the circular perforated plate at the adjacent end.

[0013] Preferably, each of the arc-shaped clamps has an airbag fixedly connected to its inner wall to reduce the pressure of the arc-shaped clamp on the skin, and the cylindrical shell is provided with a filling mechanism for inflating or deflating the airbag.

[0014] Preferably, the filling mechanism includes a Y-shaped tube that is passed through and fixedly connected to the outer contour of each cylindrical shell at the end away from the fixed rod. The two ends of each Y-shaped tube away from the cylindrical shell are respectively passed through and fixedly connected to the inner wall of the airbag at the adjacent end. The end of the fixed rod near the cylindrical shell is fixedly connected to a piston plate for inflating or deflating the airbag, and the piston plate is attached to and movably connected to the inner wall of the cylindrical shell.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: I. The clamping mechanism uses a worm gear drive to move the telescopic rod and the arc-shaped splint in a telescopic motion, enabling precise clamping and fixation of the patient's limb. The inner wall of the arc-shaped splint is designed to conform to the curvature of the human limb, allowing it to closely fit the two ends of the fracture site. The auxiliary mechanism in the clamping mechanism can drive the telescopic rods at both ends to move synchronously in a telescopic motion via a cylindrical shell and a fixing rod, ensuring that the arc-shaped splint clamps or releases the limbs at both ends of the fracture site simultaneously. This effectively avoids uneven force caused by unilateral clamping, further improving the stability of the fixation device and preventing displacement of the fracture ends. The above structure can fix both ends of the fractured limb in a short time, reducing patient pain and improving emergency treatment efficiency.

[0016] Second, by pulling the circular perforated plates with the adjusting rod, the arc-shaped splint tightens the skin of the limb, effectively reducing skin tension. The reset spring, under its own elastic force, assists the adjusting rod in pulling, ensuring the smoothness and reliability of the traction process. This avoids the problems of instability of the fixation device and displacement of the fracture ends caused by excessive skin tension, significantly reducing the risk of secondary injury. It can effectively solve the problem of instability of the fixation device caused by skin laxity and improve the stability of the fixation device on the patient's limb.

[0017] Third, by setting an airbag on the inner wall of the arc-shaped splint and inflating or deflating the airbag through the piston plate and Y-shaped tube, the airbag can expand or contract according to the shape and pressure needs of the patient's limb. The flexible material of the airbag can conform to the surface of the limb and evenly distribute the pressure, thereby reducing the pressure on the skin, improving the patient's comfort, and effectively reducing the occurrence of complications such as pressure sores. The airbag surface is equipped with anti-slip texture, which increases friction with the skin surface and effectively prevents the fixation device from sliding or shifting on the patient's limb, further improving the stability of the fixation device and ensuring the durability of the fixation effect.

[0018] The combined use of the above structures solves the problem that, in actual use, existing devices are prone to shaking due to the relatively loose and tensile skin on the limb surface, which can lead to further displacement of the fracture ends and cause secondary injury to the patient. Therefore, it is difficult to reduce the tension of the patient's limb surface skin. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the part where the circular perforated plate of the present invention is located; Figure 3 This is a three-dimensional cross-sectional view of the part where the circular perforated plate of the present invention is located; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle; Figure 5 This is a three-dimensional cross-sectional view of the part where the worm gear is located in the present invention; Figure 6 This is a three-dimensional cross-sectional view of the portion of the cylindrical shell of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a three-dimensional structural diagram of the part where the adjusting rod of the present invention is located; Figure 9 This is a three-dimensional structural diagram of the location of the cylindrical block in this invention.

[0020] In the diagram: 1. Support frame; 2. Columnar rod; 3. Circular perforated plate; 301. Telescopic groove; 302. Support groove; 4. Telescopic rod; 5. Arc-shaped clamp; 6. Airbag; 7. Columnar block; 8. Worm gear; 801. Arc-shaped groove; 9. Fixing block; 10. Worm; 11. Columnar shell; 12. Fixing rod; 13. Fixing seat; 14. Adjusting rod; 15. Y-shaped tube; 16. Piston plate; 17. Return spring. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1 to 9This invention provides a technical solution: a limb fracture trauma emergency fixation device, including a support frame 1. Columnar rods 2 are symmetrically connected to both sides of the support frame 1. Circular perforated plates 3, which are fitted onto the limbs at both ends of the fracture site, are symmetrically connected to both ends of the columnar rods 2. Each circular perforated plate 3 has multiple annular arrayed telescopic grooves 301 on its inner wall. A telescopic rod 4 is telescopically connected to the inner wall of each telescopic groove 301. An arc-shaped clamping plate 5 is fixedly connected to the end of each telescopic rod 4 away from the telescopic groove 301 to clamp and fix the patient's limb. The circular perforated plate 3 is equipped with a fixation mechanism that drives the arc-shaped clamping plate 5 to clamp or release, and a traction mechanism that pulls the circular perforated plate 3 to move in opposite directions and tightens the limb skin.

[0023] In use, by setting up a support frame 1, when the patient is lying flat, the support frame 1 can be stably supported on the hospital bed, improving the stability of the fixation device. The column rod 2 set on the support frame 1 is fixedly supported on the support frame 1. The circular perforated plate 3 set on the column rod 2 supports the circular perforated plate 3, allowing the circular perforated plate 3 to move horizontally on the outer contour of the column rod 2. The telescopic groove 301 opened on the circular perforated plate 3, and the telescopic rod 4 set on the telescopic groove 301, allows the telescopic groove 301 to support the telescopic rod 4, so that the telescopic rod 4 can move telescopically on the inner wall of the telescopic groove 301. The arc-shaped splint 5 set on the telescopic rod 4, and the inner wall of the arc-shaped splint 5 is designed to fit the curvature of the human limb, can closely fit the two ends of the limb at the fracture site of the patient.

[0024] First, the fractured limb is passed through the holes of two circular perforated plates 3, with the two circular perforated plates 3 positioned on the limbs at both ends of the fracture site. Through the fixation and traction mechanisms set on the circular perforated plates 3, the fixation mechanism can extend and move the arc-shaped splint 5 via the telescopic rod 4. The arc-shaped splint 5 can clamp and fix the limbs at both ends of the fracture site, ensuring the stability of the fractured limb, reducing patient pain, and improving emergency treatment efficiency. At the same time, the traction mechanism can drive the circular perforated plates 3 at both ends to move towards each other, and the arc-shaped splint 5 clamps and fixes the limbs to the skin of the patient, so that the circular perforated plates 3 can pull the skin at both ends towards the fracture site through the arc-shaped splint 5, reducing skin tension.

[0025] Example 2: Building upon Example 1, the following is a further step: The fixing mechanism includes a worm gear 8 rotatably connected to the outer contour of one of the circular perforated plates 3, and fixing blocks 9 fixedly connected at symmetrical positions on both sides of the circular perforated plate 3 near one end of the worm gear 8. A worm 10 driven by a power mechanism is rotatably connected through the fixing blocks 9 on both sides, and the worm 10 meshes with the tooth grooves on the outer contour of the fixing blocks 9.

[0026] On the opposite surfaces of the telescopic rods 4 at both ends away from the arc-shaped clamp 5, cylindrical blocks 7 are fixedly connected to allow the worm gear 8 to drive the telescopic rods 4 to reciprocate. Each circular perforated plate 3 has a corresponding support groove 302 for the telescopic rod 4 to drive the cylindrical block 7 to move synchronously. The worm gear 8 has an arc-shaped groove 801 at the corresponding position for pulling the arc-shaped clamp 5 to clamp or release the patient's limb. The cylindrical blocks 7 near the end of the worm gear 8 are respectively connected to the inner wall of the adjacent arc-shaped groove 801.

[0027] In use, the worm gear 8 is mounted on the outer contour of the circular perforated plate 3 and rotates around it. The fixing block 9 on the circular perforated plate 3 is fixedly supported on the circular perforated plate 3. The worm 10 on the fixing block 9 can rotate around the fixing block 9. The power mechanism is a motor after being energized, and the output shaft of the motor is coaxially fixed to the worm 10. When the motor is started, it drives the worm 10 to reciprocate around the fixing block 9. The teeth on the worm 10 and the worm gear 8 mesh with each other. As the worm 10 reciprocates around the fixing block, the worm gear 8 can reciprocate around the outer contour of the circular perforated plate 3 under the drive of the worm 10.

[0028] The cylindrical block 7 is fixedly supported on the telescopic rod 4 by means of the cylindrical block 7 set on the telescopic rod 4. The cylindrical block 7 is movably supported on the inner wall of the support groove 302 opened on the circular perforated plate 3, so as to avoid the cylindrical block 7 obstructing the telescopic rod 4 from telescopic movement. The cylindrical block 7 is movably supported on the inner wall of the worm gear 8 by means of the arc groove 801 opened on the worm gear 8. As the worm gear 8 reciprocates, the cylindrical block 7 can drive the telescopic rod 4 to telescopically reciprocate within the inner wall of the telescopic groove 301 under the action of the arc groove 801.

[0029] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 9As shown, in the initial state, the telescopic rod 4 is retracted into the inner wall of the telescopic groove 301, while the arc-shaped splint 5 is in the released state. When the patient's fractured limb is placed on the inner wall of the circular perforated plate 3, the worm gear 10 drives the worm wheel 8 to rotate in the C direction, so that the cylindrical block 7 can pull the telescopic rod 4 to extend away from the inner wall of the telescopic groove 301 under the action of the arc-shaped groove 801. The telescopic rod 4 can push the arc-shaped splint 5 to retract towards the center of the circular perforated plate 3, so that the arc-shaped splint 5 can contact the skin of the patient's limb and clamp and fix it.

[0030] When the worm gear 10 drives the worm wheel 8 to rotate in the opposite direction to C, the above structure moves in the opposite direction to reset, realizing that the telescopic rod 4 pulls the arc-shaped clamp 5 to release the limb, so that medical staff can remove the fixation device from the patient's limb.

[0031] The cylindrical block 7 is provided with an auxiliary mechanism for the worm gear 8 to drive the arc-shaped clamping plates 5 at both ends to clamp or release synchronously. The auxiliary mechanism includes cylindrical shells 11 fixedly connected to the cylindrical block 7 near the end of the worm gear 8. The inner wall of each cylindrical shell 11 away from the end of the worm gear 8 is penetrated and movably connected with a fixed rod 12 for axial reciprocating movement. The end of each fixed rod 12 away from the cylindrical shell 11 is fixedly connected to the cylindrical block 7 at the adjacent end.

[0032] In use, the cylindrical shell 11 and fixing rod 12 on the cylindrical block 7 are fixed and supported on the cylindrical blocks 7 at both ends, and each fixing rod 12 passes through the inner wall of the cylindrical shell 11 at a symmetrical position and is axially connected. When the worm gear 8 drives the telescopic rod 4 at one end to extend and retract, the cylindrical shell 11 and fixing rod 12 can drive the telescopic rod 4 at the other end to extend and retract synchronously. This allows the telescopic rods 4 at both ends to drive the arc splint 5 to clamp or release the limbs at both ends of the fracture site, ensuring the stability of the limbs at both ends of the fracture site and avoiding displacement of the fracture site, which could cause secondary injury to the patient. The above structure can fix the two ends of the fracture site in a short time, reduce the patient's pain, and improve the efficiency of emergency treatment.

[0033] Example 3: Building upon Example 2, the following is a further step: The pulling mechanism includes a fixed seat 13 fixedly connected to the support frame 1. Both sides of the fixed seat 13 are rotatably connected to adjusting rods 14 that pull the circular perforated plates 3 at both ends to move horizontally back and forth in opposite directions. The ends of the two adjusting rods 14 away from the fixed seat 13 are respectively rotatably connected to the cylindrical shell 11 and the fixed rod 12 at the adjacent ends.

[0034] Both cylindrical rods 2 are fitted with a return spring 17 on their outer contours to guide the circular perforated plate 3 to move horizontally back to its original position. Each return spring 17 is fixedly connected at both ends to the circular perforated plate 3 at the adjacent end.

[0035] In use, the fixed seat 13 is fixedly supported on the support frame 1 by the fixed seat 13 provided on the support frame 1, and the adjusting rod 14 provided on the fixed seat 13 allows the adjusting rod 14 to be rotatably connected on the fixed seat 13. At the same time, the ends of the two adjusting rods 14 are respectively rotatably supported on the bottom cylindrical shell 11 and the fixed rod 12. The return spring 17, which is installed on the cylindrical rod 2, is fixed at both ends to the circular perforated plates 3 at both ends. Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, in the initial state, the return spring 17 is in a stretched state. As the telescopic rod 4 extends away from the inner wall of the telescopic groove 301, the bottom cylindrical shell 11 and the fixing rod 12 move away from the fixing seat 13 under the action of the cylindrical block 7. At this time, the adjusting rod 14, supported by the fixing seat 13, can pull the circular perforated plates 3 at both ends to move towards each other through the cylindrical shell 11 and the fixing rod 12. At the same time, the return spring 17, under its own tension, can assist the adjusting rod 14 in pulling the circular perforated plates 3 at both ends to move towards each other. When the telescopic rod 4 extends and drives the arc-shaped splint 5 to contact the patient's skin, the relative movement of the circular perforated plates 3 can tighten the skin at both ends of the limb through the arc-shaped splint 5, reducing skin tension and improving the stability of the fixation device. This avoids the problem of instability of the fixation device and displacement of the fracture ends caused by excessive skin tension, significantly reducing the risk of secondary injury. It can effectively solve the problem of instability of the fixation device caused by skin laxity and improve the stability of the fixation device on the patient's limb.

[0036] As the telescopic rod 4 moves toward the inner wall of the telescopic groove 301 to retract and reset, the above structure moves in the opposite direction to reset simultaneously. As a result, the adjusting rod 14 can push the circular perforated plates 3 at both ends to move in opposite directions through the cylindrical housing 11 and the adjusting rod 14. At the same time, the reset spring 17 is stretched under the action of the circular perforated plates 3.

[0037] Example 4: Building upon Example 3, the following is a further improvement: Each of the arc-shaped clamps 5 has an airbag 6 fixedly connected to its inner wall to reduce the pressure of the arc-shaped clamps 5 on the skin, and the cylindrical shell 11 is provided with a filling mechanism for inflating or deflating the airbag 6.

[0038] The filling mechanism includes a Y-shaped tube 15 that is passed through and fixedly connected to the outer contour of each cylindrical shell 11 away from the fixed rod 12. The two ends of each Y-shaped tube 15 away from the cylindrical shell 11 are respectively connected to the inner wall of the airbag 6 at the adjacent end. The fixed rod 12 is fixedly connected to a piston plate 16 for inflating or deflating the airbag 6 at the end near the cylindrical shell 11. The piston plate 16 is attached to and movably connected to the inner wall of the cylindrical shell 11.

[0039] In use, the airbags 6 on the arc-shaped clamp 5 are fixedly supported on the inner wall of the arc-shaped clamp 5. The Y-shaped tube 15 on the cylindrical shell 11 connects the airbags 6 at their corresponding positions to the inner wall of the cylindrical shell 11. The piston plate 16 on the fixed rod 12 is fixedly supported on the fixed rod 12, and the piston plate 16 passes through and supports the inner wall of the cylindrical shell 11 and fits against the inner wall of the cylindrical shell 11. When the adjusting rod 14 pulls the cylindrical shell 11 and the fixed rod 12 to move towards each other, the fixed rod 12 can push the airbags 6 to the inner wall of the cylindrical shell 11. The plug plate 16 moves axially toward the end near the Y-shaped tube 15, and the internal air pressure of the cylindrical shell 11 near the Y-shaped tube 15 is positive. Then the Y-shaped tube 15 can fill the inner wall of the airbag 6 with the gas inside the cylindrical shell 11, so that the airbag 6 can inflate and clamp onto the skin of the limb. The airbag 6 is made of flexible material, which can conform to the limb surface and evenly distribute the pressure, thereby reducing the pressure on the skin, improving the patient's comfort, effectively reducing the occurrence of complications such as pressure sores, and avoiding the problem of rigid contact between the arc splint 5 and the patient's skin, which causes pressure on the limb. The surface of the airbag 6 is equipped with anti-slip texture, which can increase the friction with the skin surface and effectively prevent the fixation device from sliding or shifting on the patient's limb, further improving the stability of the fixation device and ensuring the durability of the fixation effect.

[0040] Furthermore, the existing device can reduce the tension on the patient's limb skin surface during actual use, improve the stability of the fixation device, and is convenient to use, making it superior to traditional products.

[0041] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A limb fracture trauma emergency fixation device, characterized in that: The support frame (1) is provided with columnar rods (2) that are symmetrically connected to both sides of the support frame (1). Circular perforated plates (3) that are sleeved on the limbs at both ends of the fracture site are symmetrically connected to both ends of the columnar rods (2). Multiple annular array telescopic grooves (301) are provided on the inner wall of each circular perforated plate (3). Telescopic rods (4) are telescopically connected to the inner wall of each telescopic groove (301). An arc-shaped splint (5) for clamping and fixing the patient's limb is fixedly connected to the end of each telescopic rod (4) away from the telescopic groove (301). The circular perforated plate (3) is provided with a fixing mechanism that drives the arc-shaped splint (5) to clamp or release and a traction mechanism that pulls the circular perforated plate (3) to move in opposite directions and tightens the skin of the limb.

2. The limb fracture trauma first aid fixation device according to claim 1, characterized in that: The fixing mechanism includes a worm gear (8) rotatably connected to the outer contour of one of the circular perforated plates (3), and fixing blocks (9) fixedly connected at symmetrical positions on both sides of the circular perforated plate (3) near one end of the worm gear (8). A worm (10) driven by a power mechanism is rotatably connected through the fixing blocks (9) on both sides, and the worm (10) meshes with the tooth groove on the outer contour of the fixing block (9).

3. The limb fracture trauma emergency fixation device according to claim 2, characterized in that: On the opposite surfaces of the telescopic rods (4) at both ends away from the arc-shaped clamp (5), cylindrical blocks (7) are fixedly connected to allow the worm gear (8) to drive the telescopic rods (4) to reciprocate. Each circular perforated plate (3) is provided with a support groove (302) at the corresponding position of the cylindrical block (7) to allow the telescopic rod (4) to drive the cylindrical block (7) to move synchronously. The worm gear (8) is provided with an arc-shaped groove (801) at the corresponding position of the cylindrical block (7) to pull the arc-shaped clamp (5) to clamp or release the patient's limb. The cylindrical blocks (7) near the end of the worm gear (8) are respectively connected to the inner wall of the adjacent arc-shaped groove (801).

4. The limb fracture trauma emergency fixation device according to claim 3, characterized in that: The cylindrical block (7) is provided with an auxiliary mechanism for the worm gear (8) to drive the arc-shaped clamping plates (5) at both ends to clamp or release synchronously. The auxiliary mechanism includes a cylindrical shell (11) fixedly connected to the cylindrical block (7) near the end of the worm gear (8). The inner wall of each cylindrical shell (11) away from the end of the worm gear (8) is penetrated and movably connected with a fixed rod (12) for axial reciprocating movement. The end of each fixed rod (12) away from the cylindrical shell (11) is fixedly connected to the cylindrical block (7) at the adjacent end.

5. The limb fracture trauma first aid fixation device according to claim 1, characterized in that: The pulling mechanism includes a fixed seat (13) fixedly connected to a support frame (1). Both sides of the fixed seat (13) are rotatably connected to adjusting rods (14) that pull the circular perforated plates (3) at both ends to move horizontally back and forth in opposite directions. The ends of the two adjusting rods (14) away from the fixed seat (13) are respectively rotatably connected to the cylindrical shell (11) and the fixed rod (12) at the adjacent ends.

6. The limb fracture trauma first aid fixation device according to claim 1, characterized in that: Both cylindrical rods (2) are fitted with a reset spring (17) on their outer contours to guide the circular perforated plate (3) to move horizontally. Each reset spring (17) is fixedly connected at both ends to the circular perforated plate (3) at the adjacent end.

7. The limb fracture trauma first aid fixation device according to claim 5, characterized in that: Each of the arc-shaped clamps (5) has an airbag (6) fixedly connected to its inner wall to reduce the pressure of the arc-shaped clamps (5) on the skin. The cylindrical shell (11) is provided with a filling mechanism for inflating or deflating the airbag (6).

8. The limb fracture trauma first aid fixation device according to claim 7, characterized in that: The filling mechanism includes a Y-shaped tube (15) that is passed through and fixedly connected to the outer contour of each cylindrical shell (11) away from the fixed rod (12). The two ends of each Y-shaped tube (15) away from the cylindrical shell (11) are respectively passed through to the inner wall of the airbag (6) at the adjacent end and fixedly connected. The fixed rod (12) is fixedly connected to a piston plate (16) for inflating or deflating the airbag (6) at the end near the cylindrical shell (11). The piston plate (16) is attached to and movably connected to the inner wall of the cylindrical shell (11).

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