An orthopedic splint fixation device

Abstract

The application discloses an orthopedic splint fixing device and a use method thereof, and relates to the technical field of medical auxiliary equipment. The orthopedic splint fixing device comprises a small-arm restraint shell provided with a small-arm bandage and a large-arm restraint shell provided with a large-arm bandage, and further comprises a hinge assembly arranged between the upper part of the proximal end of the small-arm restraint shell and the lower part of the distal end of the large-arm restraint shell, so that the degree of freedom between the small-arm restraint shell and the large-arm restraint shell is between 0 and 120 degrees. Through the cooperative design of the non-invasive sleeve hoop and the multi-degree-of-freedom hinge member, the biomechanical efficiency of fracture fixation is significantly improved. The elastic compression part and the mechanical adjusting system are adopted to realize dynamic pressure adaptation. During the swelling period, the elastic connecting part can absorb local compressive stress, and after the swelling is eliminated, the initial fixing strength can be maintained, so that the clinical pain point of secondary displacement of the traditional splint can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary equipment technology, specifically to an orthopedic splint fixation device. Background Technology

[0002] The key to fracture treatment lies in anatomical reduction and effective fixation. Traditional external fixation techniques use bone pins that penetrate the skin to connect rigid external rods to form a mechanical stability system. However, its inherent defects are reflected in three aspects: (1) invasive operation leads to an increased risk of infection; (2) when fixing across joints, the rigid structure of the rods restricts physiological movement, causing complications such as joint stiffness; (3) the articulated improved device has anatomical adaptation defects, and its rotation axis often deviates from the joint movement plane by more than 5°, resulting in non-physiological stress transmission.

[0003] While wrist splints, such as US4776771, employ a multi-directional adjustment design, their hinge mechanism lacks bony anchor points, making them suitable only for soft tissue injuries rather than fracture fixation. Although the Ilizarov ring splint achieves three-dimensional control through multi-plane pin insertion, clinical data shows that its complication rate is as high as 34%, including pin tract infection, nerve damage, and poor patient compliance.

[0004] Chinese patent CN101198283A discloses a fixator or splint. This structure solves the technical problems of traditional invasive fixators, such as easy infection, restricted cross-joint movement, and difficulty in axis alignment, through proximal and distal sleeves and multi-degree-of-freedom hinge components. By using a rigid rod in combination with a ball-and-socket universal joint and a telescopic hinge structure, a three-dimensional adjustable and lockable mechanical fixation system is achieved, which reduces the deviation between the joint movement plane and the fixator hinge axis, allowing multi-plane movement within the physiological range while ensuring fracture stability.

[0005] During the initial stage of a fracture, as the soft tissues swell and the swelling subsides, traditional rigid splints lack an adaptive adjustment mechanism, leading to a phased contradiction in fixation effectiveness. During the swelling period, the splint compresses the affected area, exacerbating local ischemia and prolonging the healing period. After the swelling subsides, the gap between the splint and the limb increases, reducing fixation stability and torsional strength. This forces medical staff to frequently adjust the tightness manually, and the shearing force generated during the operation can easily cause secondary displacement after fracture reduction. This dynamic imbalance significantly affects the mechanical stability of fracture healing and increases the probability of iatrogenic injury. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an orthopedic splint fixation device that solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this invention provides an orthopedic splint fixation device, comprising a forearm restraint shell with forearm straps and an upper arm restraint shell with upper arm straps, and a pivot assembly disposed between the upper proximal end of the forearm restraint shell and the lower distal end of the upper arm restraint shell, allowing the degree of freedom between the forearm restraint shell and the upper arm restraint shell to be between 0-120°; a hand restraint sleeve disposed at the distal end of the forearm restraint shell, and a universal connector with a self-locking function is provided between the hand restraint sleeve and the forearm restraint shell; and at least two sets of clamping members, which are staggered on both sides of the forearm restraint shell and can move along the length of the forearm restraint shell and the axis of the forearm to adjust the contact position and pressure between the clamping members and the splint.

[0008] Furthermore, the clamping component includes an outer arc plate and an inner arc plate, wherein the inner arc plate abuts against the clamping plate, and an elastic connection is provided between the inner arc plate and the outer arc plate, allowing the inner arc plate to move a short distance toward the outer arc plate.

[0009] Furthermore, it also includes a threaded sleeve, with lead screws fixed on both sides of the forearm constraint housing, and a threaded sleeve threadedly connected to the lead screws. A rotating ring fixedly connected to one end of the outer arc plate is fitted with the outer side of the threaded sleeve with clearance; a ratchet, which is fixed to one end of the rotating ring; a movable seat, which can slide along the length of the forearm constraint housing, and the movable seat, threaded sleeve, and ratchet are all rotatably connected via bearings; and a pawl, with a rotating shaft rotatably connected to the inner side of the movable seat, a torsion spring installed between one end of the rotating shaft and the inner side of the movable seat, and a pawl that cooperates with the ratchet fixed to the outside of the rotating shaft. A lever is provided at the upper end of the pawl, and the lever moves toward the forearm to separate the pawl from the ratchet.

[0010] Furthermore, the universal connector includes a second connecting rod and a third connecting rod; wherein, a first connecting head is fixed at both ends of the second connecting rod, and a second connecting head that mates with the corresponding first connecting head is fixed at one end of the third connecting rod near the second connecting rod and on one side of the forearm restraint housing; a cross pin is provided between the first connecting head and the second connecting head, and the cross pin is connected to both the first and second connecting heads via bearings; it also includes a locking structure, which is provided on the second connecting rod and is used to restrict the movement of the second connecting head on the first connecting head.

[0011] Furthermore, the locking structure includes a T-shaped channel located within a cross pin, with a first movable post and a second movable post slidably disposed at both ends of the T-shaped channel. A first limiting tooth is fixed to the end of the first and second movable posts furthest from the center of the cross pin. A second limiting tooth is fixed to the first and second connectors and is adapted to the first limiting tooth. A push rod is slidably disposed at the other end of the T-shaped channel, and the push rod moves to drive the first and second movable posts to move, causing the first and second limiting teeth to engage or disengage.

[0012] Furthermore, the locking structure also includes a limiting rod, which has an inverted U-shape and both ends are inserted into the T-shaped channel and fixedly connected to the top rod; and an adjusting bolt, which is rotatably installed in the middle of the limiting rod and is threadedly connected to the second connecting rod to adjust the height position of the limiting rod.

[0013] Furthermore, the hub assembly includes two sets of U-shaped connecting rods, symmetrically arranged between the forearm constraint housing and the upper arm constraint housing. Each U-shaped connecting rod has a bushing rotatably connected to both ends, with one bushing fixedly connected to the forearm constraint housing. There are also two sets of first connecting rods, symmetrically fixed to the outside of the upper arm constraint housing, with one end of each first connecting rod fixedly connected to the other bushing. Finally, a transmission structure is located in the middle section of one of the U-shaped connecting rods, used to drive or lock the rotation between the U-shaped connecting rod and the bushing.

[0014] Furthermore, the transmission structure includes a half gear mounted on a bushing; a full gear rotatably mounted on the middle section of the first connecting rod, and meshing with the half gear; an operating box fixed to the middle section of the first connecting rod, with an internal gear fixed inside the operating box near the full gear, and a through hole at the other end of the operating box, into which a sleeve is slidably installed, a drive disc at one end of the sleeve, and a push plate installed at the other end of the sleeve extending into the operating box, with a third limiting tooth fixed on the push plate; wherein, the central shaft of the full gear extends into the operating box and is fixed with a guide post, and the guide post is slidably connected to the inner wall of the sleeve.

[0015] Furthermore, a first return spring is installed on the outer side of the sleeve between the push plate and the through hole, and a connecting ring is installed on the end of the first return spring facing the push plate, and the connecting ring is rotatably connected to the push plate.

[0016] On the other hand, the present invention also provides a method of using an orthopedic splint fixation device, comprising the following steps:

[0017] Step 1: Based on the X-ray fluoroscopy examination of the fracture, adjust the position of the orthopedic splint fixation device according to the examination results, and then put the adjusted orthopedic splint fixation device on the patient's fractured arm.

[0018] Step 2: Adjust the position of the clamping parts and the clamping effect on the clamping plate;

[0019] Step 3: Examine the fracture location using X-ray fluoroscopy. If poor reduction is found, adjust the universal connector to adjust the posture between the hand and forearm, and adjust the pivot component to adjust the posture between the upper arm and forearm.

[0020] The present invention has the following beneficial effects:

[0021] (1) This orthopedic splint fixation device significantly improves the biomechanical efficiency of fracture fixation through the synergistic design of non-invasive sleeve and multi-degree-of-freedom hinge components. It adopts elastic clamping components and mechanical adjustment system (including ratchet mechanism and threaded sleeve) to achieve dynamic pressure adaptation. During the swelling period, it absorbs local compressive stress through elastic connection and maintains the initial fixation strength after the swelling subsides, effectively avoiding the clinical pain point of secondary displacement of traditional splints.

[0022] (2) The orthopedic splint fixation device can be adjusted according to the patient’s condition by the independent movement of each clamping component, which is conducive to the balance of splint pressure and improves the rehabilitation effect of fracture. The frame is constructed with X-ray permeable composite material POM plastic and a non-closed elastic inner lining design to reduce the soft tissue compression area.

[0023] (3) The orthopedic splint fixation device achieves rapid locking of the universal connector through the locking structure, which fixes the angle between the hand restraint sleeve and the forearm restraint shell. The angle between the forearm restraint shell and the upper arm restraint shell is locked through the pivot component, thereby achieving posture locking of the entire arm. This can effectively prevent joint displacement caused by hand movement and forearm rotation and flexion. Since both locking methods achieve the locking effect through tooth meshing, in the locked state, it can ensure the physiological activity of the joint and ensure that the displacement of the fracture ends is controlled within the clinical safety threshold.

[0024] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 In this invention Figure 1 Top view;

[0027] Figure 3 This is a schematic diagram of the structure when the present invention is in use;

[0028] Figure 4 In this invention Figure 3 Another perspective view;

[0029] Figure 5 This is a schematic diagram of the installation structure of the clamping component in this invention;

[0030] Figure 6 This is a schematic diagram of the clamping component in this invention;

[0031] Figure 7 This is a schematic diagram of the installation structure of the ratchet and pawl in this invention;

[0032] Figure 8 This is a schematic diagram of the structure of the hub component in this invention;

[0033] Figure 9 This is a schematic diagram of the internal structure of the operation box in this invention;

[0034] Figure 10 This is a schematic diagram of the installation structure of the hand restraint sleeve in this invention;

[0035] Figure 11 This is a schematic diagram of the cross pin limiting structure in this invention;

[0036] Figure 12 For the present invention Figure 11 Enlarged view of point A in the middle.

[0037] In the diagram, 1. Forearm restraint shell; 2. Upper arm restraint shell; 3. Hand restraint sleeve; 4. Thumb hole; 5. Forearm strap; 6. Upper arm strap; 7. First connecting rod; 8. Lead screw; 9. Threaded sleeve; 10. Push plate; 11. Rotary ring; 12. Second connecting rod; 13. Third connecting rod; 14. Clamping component; 141. Outer arc plate; 142. Inner arc plate; 143. Elastic connecting part; 15. Operating box; 16. Elbow limiting strip; 17. U-shaped connecting rod; 18. Bushing; 19. Movable seat; 20. Slide groove; 21. Half gear; 22. Full gear; 23. Ratchet; 24. Guide rail; 25. Dial plate; 26. Pawl; 27. Rotating shaft; 28. Torsion spring; 29. ​​Drive disc; 30. Sleeve; 31. Through hole; 32. Guide post; 33. Internal gear; 34. Third limiting tooth; 35. First return spring; 36. First connector; 37. Second connector; 38. Limiting rod; 39. Adjusting bolt; 40. Cross pin; 41. T-shaped channel; 42. Push rod; 43. First movable post; 44. Second movable post; 45. Second return spring; 46. First limiting tooth; 47. Second limiting tooth. Detailed Implementation

[0038] 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.

[0039] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0040] The following is based on Figures 1-12 This invention describes an orthopedic splint fixation device provided in an embodiment of the invention.

[0041] Please see Figures 1-12 This invention provides a technical solution: an orthopedic splint fixation device, comprising a forearm restraint shell 1 with forearm straps 5 and an upper arm restraint shell 2 with upper arm straps 6. The forearm restraint shell 1 and the upper arm restraint shell 2 may be composed of multiple strips or straps, which have a structure that conforms to the shape of the body parts adjacent to the fracture site. It should be noted that the materials of the forearm restraint shell 1 and the upper arm restraint shell 2 are durable and can withstand long-term contact with the patient's skin without causing harm to the patient. Hook and loop fasteners may be provided on the forearm straps 5 and the upper arm straps 6 for easy binding after wearing.

[0042] The orthopedic splint fixation device provided in this embodiment also includes a pivot assembly. The pivot assembly is located between the upper proximal end of the forearm restraint shell 1 and the lower distal end of the upper arm restraint shell 2, so that the degree of freedom between the forearm restraint shell 1 and the upper arm restraint shell 2 is between 0-120°. It is mainly used to provide extension or flexion movements. When the patient wears this device, the pivot assembly is aligned with the patient's elbow joint.

[0043] In addition, to fix the patient's wrist posture, the orthopedic splint fixation device provided in this embodiment also includes a hand restraint sleeve 3 with a thumb hole 4. The hand restraint sleeve 3 can be injection molded from PE material, and a flexible pad can be added to the inner side of the part in contact with the hand. The hand restraint sleeve 3 is located at the distal end of the forearm restraint shell 1, and a universal connector with a self-locking function is provided between the hand restraint sleeve 3 and the forearm restraint shell 1. For fractures occurring at the distal radius (near the wrist), it is necessary to align the universal connector with the fracture site. In this case, the posture between the hand and the forearm is restrained to reduce the phenomenon of wrist joint fracture repositioning after reduction due to the traction of hand joint movement. With the upper arm restraint shell 2, the posture of the patient's entire arm can be locked to avoid fracture displacement caused by forearm rotation and extension.

[0044] In addition, to avoid uneven force on the splint, which could lead to poor rehabilitation after fracture, the orthopedic splint fixation device provided in this embodiment also includes a clamping member 14. There are at least two sets of clamping members 14. The clamping members 14 are staggered on both sides of the forearm restraint shell 1, and the clamping members 14 can move along the length of the forearm restraint shell 1 and the axis of the forearm to adjust the contact position and pressure between the clamping members 14 and the splint. By adjusting the position of the clamping members 14, it can meet the needs of different forearm shapes. By adjusting the rotation of the clamping members 14, the pressure of the clamping members 14 on the splint can be kept the same or nearly the same, so that the force on the patient's arm is more even, thereby improving the quality of patient rehabilitation.

[0045] like Figure 5 and Figure 6 As shown, since patients usually experience swelling and swelling reduction after a fracture, the clamping component 14 provided in this embodiment includes two parts: an outer arc plate 141 and an inner arc plate 142. The inner arc plate 142 abuts against the splint, and an elastic connecting part 143 is provided between the inner arc plate 142 and the outer arc plate 141, allowing the inner arc plate 142 to move a short distance towards the outer arc plate 141. When the inner arc plate 142 squeezes the splint, the elastic connecting part 143 contracts to reduce the distance between the inner arc plate 142 and the outer arc plate 141. Thus, the local swelling and swelling reduction of the patient can be addressed without adjusting the position of the clamping component 14. Of course, if the swelling is large, it is still necessary to adjust the position of the clamping component 14 to reduce the pressure of the splint on the patient's arm tissue.

[0046] like Figures 4-7 As shown, in order to facilitate the adjustment of the position of the clamping member 14, the orthopedic splint fixing device provided in this embodiment has screw rods 8 fixed on both sides of the forearm restraint shell 1. Threaded sleeves 9 are threadedly connected to the screw rods 8. One end of the threaded sleeve 9 is provided with an anti-slip knob, and a rotating ring 11 is fixedly connected to one end of the outer arc plate 141 with a clearance fit on the outer side of the threaded sleeve 9. That is, the rotation of the threaded sleeve 9 will not cause the rotating ring 11 to rotate. A ratchet 23 is fixed to one end of the rotating ring 11.

[0047] The orthopedic splint fixation device provided in this embodiment also includes a movable seat 19, which can slide along the length of the forearm restraint shell 1. The movable seat 19, the threaded sleeve 9, and the ratchet 23 are all rotatably connected by bearings. A rotating shaft 27 is rotatably connected to the inner side of the movable seat 19. A torsion spring 28 is installed between one end of the rotating shaft 27 and the inner arm of the movable seat 19. A pawl 26 that cooperates with the ratchet 23 is fixed to the outside of the rotating shaft 27. A lever 25 is provided at the upper end of the pawl 26. The lever 25 moves toward the forearm, so that the pawl 26 is separated from the ratchet 23.

[0048] It should be noted that the movable seat 19 has an L-shaped structure and a groove on its inner side. The lever 25 is located inside the movable seat 19, meaning that the lever 25 does not extend beyond the upper end of the movable seat 19 to prevent accidental contact by the patient. Guide rails 24 are provided on both sides of the forearm restraint shell 1, and a sliding groove 20 is provided on the movable seat 19. The sliding groove 20 is slidably connected to the guide rails 24, mainly for traction of the movable seat 19, preventing the movable seat 19 from rotating with the threaded sleeve 9. In actual use, the threaded sleeve 9 is rotated by rotating the anti-slip knob, and the threaded sleeve 9 is tractioned by the screw 8. When the threaded sleeve 9 is positioned along the length of the forearm restraint shell 1, press the lever 25 to move it toward the forearm. The pawl 26 separates from the ratchet 23, and the rotating ring 11 is unrestrained. This allows the outer arc plate 141 to rotate, adjusting the pressure of the clamping member 14 on the clamp. Release the lever 25, and under the action of the torsion spring 28, the pawl 26 engages with the ratchet 23, thus locking the ratchet 23. At this point, the clamping member 14 can only rotate toward the arm, preventing the clamp from loosening and reducing the fracture fixation effect.

[0049] like Figure 2 , Figure 3 , Figure 4 , Figure 10 , Figure 11 and Figure 12 As shown, the universal connector provided in this embodiment includes a second connecting rod 12 and a third connecting rod 13. The second connecting rod 12 has a first connector 36 fixed at both ends. The third connecting rod 13 has a second connector 37 fixed at one end near the second connecting rod 12 and on the side of the forearm restraint shell 1, which mates with the corresponding first connector 36. Preferably, the first connector 36, the second connector 37, the second connecting rod 12 and the third connecting rod 13 are all made of POM plastic to reduce the impact during X-ray fluoroscopy.

[0050] To facilitate movement between the first connector 36 and the second connector 37, a cross pin 40 is provided between the first connector 36 and the second connector 37. The cross pin 40 is connected to both the first connector 36 and the second connector 37 via bearings.

[0051] To achieve locking of the universal connector and maintain the stability of the posture between the hand and arm, the universal connector provided in this embodiment also includes a locking structure. The locking structure is provided on the second connecting rod 12 and is used to restrict the movement of the second connector 37 on the first connector 36.

[0052] like Figures 10-12 As shown, the locking structure provided in this embodiment includes a T-shaped channel 41, which is located inside the cross pin 40. A first movable post 43 and a second movable post 44 are slidably arranged at both ends of the T-shaped channel 41. A first limiting tooth 46 is fixed at the end of the first movable post 43 and the second movable post 44 away from the center of the cross pin 40. It should be noted that, in order to avoid the cross pin 40 from breaking, the T-shaped channel 41 provided in this embodiment can be made of POM plastic, metal such as steel or aluminum alloy, or a combination of plastic and metal. It needs to be strong enough to support the movement of the joint without deforming or being damaged.

[0053] The locking structure provided in this embodiment also includes a second limiting tooth 47 and a push rod 42. The second limiting tooth 47 is fixed on the first connector 36 and the second connector 37, and the second limiting tooth 47 is adapted to the first limiting tooth 46. The push rod 42 is slidably disposed at the other end inside the T-shaped channel 41. The push rod 42 moves to drive the first movable column 43 and the second movable column 44 to move, so that the first limiting tooth 46 and the second limiting tooth 47 are engaged or disengaged. Preferably, the contact parts of the push rod 42 and the first movable column 43 are both inclined structures, so that the lifting height of the push rod 42 is adapted to the moving range of the first movable column 43 and the second movable column 44. That is, the first limiting tooth 46 on the first movable column 43 is engaged with the second limiting tooth 47, and the first limiting tooth 46 on the second movable column 44 is also engaged synchronously.

[0054] It should be further explained that, preferably, two sets of partitions are fixed inside the T-shaped channel. The two sets of partitions are slidably connected to the first movable column 43 and the second movable column 44, respectively. A second return spring 45 is installed on the outside of the first movable column 43 and the second movable column 44 between the partition and the first limiting tooth 46. The second return spring 45 is used to drive the first limiting tooth 46 and the second limiting tooth 47 to separate, thereby facilitating the arbitrary movement of the first connector 36 and the second connector 37 during operation.

[0055] like Figures 10-12As shown, the locking structure provided in this embodiment also includes a limiting rod 38 and an adjusting bolt 39. The limiting rod 38 has an inverted "U" shape, and both ends of the limiting rod 38 are inserted into the T-shaped channel 41 and fixedly connected to the top rod 42. That is, the limiting rod 38 can drive the top rod 42 to rise and fall. An adjusting bolt 39 is rotatably installed in the middle of the limiting rod 38. The adjusting bolt 39 is threadedly connected to the second connecting rod 12 and is used to adjust the height position of the limiting rod 38. Due to the restriction of the T-shaped channel 41, the limiting rod 38 can only rise and fall along the adjusting bolt 39. By rotating the adjusting bolt 39, the limiting rod 38 rises and falls, thereby driving the top rod 42 to move. When the top rod 42 drives the first limiting tooth 46 and the second limiting tooth 47 on the first movable column 43 and the second movable column 44 to engage, the second return spring 45 is compressed. When the top rod 42 moves away from the first movable column 43 and the second movable column 44, the first limiting tooth 46 and the second limiting tooth 47 are separated by the elastic force of the second return spring 45.

[0056] like Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9 As shown, the hub assembly provided in this embodiment includes two sets of U-shaped connecting rods 17, which are symmetrically arranged between the forearm restraint housing 1 and the upper arm restraint housing 2. Both ends of the U-shaped connecting rod 17 are rotatably connected to bushings 18. One bushing 18 is fixedly connected to the forearm restraint housing 1, preferably to the lead screw 8 on the forearm restraint housing 1. In addition, the hub assembly provided in this embodiment also includes two sets of first connecting rods 7, which are symmetrically fixed to the outside of the upper arm restraint housing 2. One end of the first connecting rod 7 is fixedly connected to the other bushing 18. Through the rotatable connection between the bushing 18 and the U-shaped connecting rod 17, the rotation between the first connecting rod 7 and the forearm restraint housing 1 can be realized.

[0057] To lock or drive the rotation between the U-shaped connecting rod 17 and the bushing 18, the hub assembly provided in this embodiment also includes a transmission structure, which is located in the middle section of one of the U-shaped connecting rods 17 and is used to drive or lock the rotation between the U-shaped connecting rod 17 and the bushing 18.

[0058] like Figure 8 and Figure 9As shown, the transmission structure provided in this embodiment includes a half gear 21 and a full gear 22. The half gear 21 is mounted on the bushing 18, and the full gear 22 is rotatably mounted on the middle section of the first connecting rod 7. The full gear 22 meshes with the half gear 21. When the full gear 22 rotates, the two half gears 21 rotate towards each other, thereby controlling the angle between the forearm constraint housing 1 and the upper arm constraint housing 2. An operation box 15 is also fixed in the middle section of the first connecting rod 7. An internal gear 33 is fixed inside the operation box 15 near the end of the full gear 22. The other end of the operating box 15 has a through hole 31, and a sleeve 30 is slidably installed in the through hole 31. Preferably, the inner diameter of the through hole 31 is slightly larger than the outer diameter of the sleeve 30 so as to facilitate the rotation or sliding of the sleeve 30. A drive disk 29 is provided at one end of the sleeve 30, and the other end of the sleeve 30 extends into the inside of the operating box 15 and is equipped with a push plate 10. A third limiting tooth 34 is fixed on the push plate 10. The central shaft of the full gear 22 extends into the inside of the operating box 15 and is fixed with a guide post 32. The guide post 32 is slidably connected to the inner wall of the sleeve 30.

[0059] In use, the sleeve 30 slides on the guide post 32, causing the push plate 10 to drive the third limiting tooth 34 to move toward or away from the internal gear 33. By engaging or disengaging between the internal gear 33 and the third limiting tooth 34, the guide post 32 is locked or unlocked, which helps to control the angle and stability between the forearm restraint shell 1 and the upper arm restraint shell 2.

[0060] It should be further explained that the locking structure and pivot assembly are preferably located on the side opposite to the thumb hole 4, so that when the patient's fractured arm wears this device, the locking structure and pivot assembly face outwards, which can not only prevent the patient from accidentally touching it, but also facilitate the operation of medical staff.

[0061] like Figure 8 and Figure 9 As shown, to facilitate the use of the equipment, a first return spring 35 is installed on the outside of the sleeve 30 between the push plate 10 and the through hole 31. A connecting ring is installed on one end of the first return spring 35 facing the push plate 10. The connecting ring is rotatably connected to the push plate 10. The first return spring 35 pushes the push plate 10 to move towards the internal gear 33, thereby making the internal gear 33 engage with the third limiting tooth 34 to ensure the fixed posture of the equipment when it is not in operation. In addition, an elbow limiting strip 16 can be installed between the two opposing bushings 18. Preferably, the elbow limiting strip 16 is made of flexible material and is mainly used to assist in restricting elbow movement.

[0062] During use (operation), the patient's wrist posture is determined based on the fracture examination using X-ray fluoroscopy. The angle between the forearm restraint shell 1 and the hand restraint sleeve 3 is adjusted via the universal connector. Rotating the adjusting bolt 39 causes the limiting rod 38 to move towards the second connecting rod 12, thereby driving the top rod 42 to move. This causes the top rod 42 to drive the first limiting tooth 46 and the second limiting tooth 47 on the first movable column 43 and the second movable column 44 to engage, achieving rapid locking of the universal connector to ensure the angle between the forearm restraint shell 1 and the hand restraint sleeve 3.

[0063] Pull the drive plate 29 to make the sleeve 30 slide on the guide post 32. Further push plate 10 drives the third limiting tooth 34 to move away from the internal gear 33, so that the internal gear 33 and the third limiting tooth 34 are separated, so that the guide post 32 can be unlocked and rotated. At this time, adjust the angle between the forearm restraint shell 1 and the upper arm restraint shell 2 according to the patient's condition and comfort, and release the drive plate 29. At this time, the first reset spring 35 pushes the push plate 10 to move towards the internal gear 33, so that the internal gear 33 and the third limiting tooth 34 are engaged to ensure the fixed posture of the equipment when it is not in operation.

[0064] Install the splint and wear the device on the patient's fractured arm. Rotate the anti-slip knob to rotate the threaded sleeve 9. Through the cooperation between the threaded sleeve 9 and the screw 8, adjust the position of the threaded sleeve 9 in the length direction of the forearm restraint shell 1. Press the lever 25 to move the lever 25 towards the forearm, and the pawl 26 separates from the ratchet 23. At this time, the rotating ring 11 is unrestrained, so the outer arc plate 141 can be rotated to adjust the pressure of the clamping member 14 on the splint. Release the lever 25, and under the action of the torsion spring 28, the pawl 26 engages with the ratchet 23 to lock the ratchet 23. At this time, the clamping member 14 can only rotate towards the arm, which can prevent the splint from loosening and reducing the fracture fixation effect.

[0065] The present invention also provides a method for using an orthopedic splint fixation device, comprising the following steps:

[0066] Step 1: Based on the X-ray fluoroscopy examination of the fracture, adjust the position of the orthopedic splint fixation device according to the examination results, and then put the adjusted orthopedic splint fixation device on the patient's fractured arm.

[0067] Step 2: Adjust the position of the clamping parts and the clamping effect on the clamping plate;

[0068] Step 3: Examine the fracture location using X-ray fluoroscopy. If poor reduction is found, adjust the universal connector to adjust the posture between the hand and forearm, and adjust the pivot component to adjust the posture between the upper arm and forearm.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0070] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An orthopedic splint fixation device, characterized in that, The elbow restraint shell (1) with the small arm binding belt (5) and the large arm restraint shell (2) with the large arm binding belt (6) are further provided with: A hinge assembly is arranged between the upper part of the near heart end of the small arm restraint shell (1) and the lower part of the far heart end of the large arm restraint shell (2), so that the freedom between the small arm restraint shell (1) and the large arm restraint shell (2) is between 0-120°; A hand restraint sleeve (3) is arranged at the far heart end of the small arm restraint shell (1), and a universal connecting piece with self-locking function is arranged between the hand restraint sleeve (3) and the small arm restraint shell (1); The pressing piece (14) is provided with at least two groups, and the pressing piece (14) is arranged on both sides of the small arm restraint shell (1) in a staggered manner, and the pressing piece (14) can move along the length direction of the small arm restraint shell (1) and the small arm axis, so as to adjust the contact position and pressure of the pressing piece (14) and the clamping plate; The pressing piece (14) comprises an outer arc plate (141) and an inner arc plate (142), wherein the inner arc plate (142) abuts against the clamping plate, and an elastic connecting part (143) is arranged between the inner arc plate (142) and the outer arc plate (141), so that the inner arc plate (142) can move a short distance towards the outer arc plate (141); Further comprising: A threaded sleeve (9) is fixed on the two sides of the small arm restraint shell (1), a lead screw (8) is arranged on the threaded sleeve (9), and a rotating ring (11) is arranged in the gap on the outer side of the threaded sleeve (9) and is fixedly connected with one end of the outer arc plate (141); A ratchet wheel (23) is fixed to one end of the rotating ring (11); An activity seat (19) can slide along the length direction of the small arm restraint shell (1), and the activity seat (19) is rotatably connected with the threaded sleeve (9) and the ratchet wheel (23) through bearings; A pawl (26) is rotatably connected with a rotating shaft (27) on the inner side of the activity seat (19), a torsion spring (28) is arranged between one end of the rotating shaft (27) and the inner side arm of the activity seat (19), and the rotating shaft (27) is fixedly connected with the pawl (26) matched with the ratchet wheel (23) on the outer side, and a push plate (25) is arranged on the upper end of the pawl (26), and the push plate (25) moves towards the small arm direction, so that the pawl (26) is separated from the ratchet wheel (23).

2. An orthopaedic splint fixation device according to claim 1, wherein: The universal connecting piece comprises a second connecting rod (12) and a third connecting rod (13); Wherein, the two ends of the second connecting rod (12) are fixedly connected with the first connecting head (36), the end close to the second connecting rod (12) of the third connecting rod (13) and one side of the small arm restraint shell (1) are fixedly connected with the second connecting head (37) matched with the corresponding first connecting head (36), the cross pin shaft (40) is arranged between the first connecting head (36) and the second connecting head (37), and the cross pin shaft (40) is connected with the first connecting head (36) and the second connecting head (37) through bearings; further comprising A locking structure is arranged on the second connecting rod (12) to limit the movement of the second connecting head (37) on the first connecting head (36).

3. An orthopaedic splint fixation device according to claim 2, wherein, The locking structure comprises: T-shaped channel (41) is arranged in the cross pin shaft (40), and two ends of the T-shaped channel (41) are slidably provided with a first movable column (43) and a second movable column (44) respectively, and the first movable column (43) and the second movable column (44) are fixed with a first limiting tooth (46) at the end away from the center of the cross pin shaft (40); The second limiting tooth (47) is fixed on the first connecting head (36) and the second connecting head (37), and the second limiting tooth (47) is matched with the first limiting tooth (46); The top rod (42) is slidably arranged at the other end of the T-shaped channel (41), and the top rod (42) is movable to drive the first movable column (43) and the second movable column (44) to move, so that the first limiting tooth (46) and the second limiting tooth (47) are engaged or separated.

4. The orthopedic splint securement device of claim 3, wherein, The locking structure further comprises: The limiting rod (38) is in an inverted "n" shape structure, and the limiting rod (38) is inserted into the T-shaped channel (41) at both ends and fixedly connected with the top rod (42); The limiting rod (38) is rotatably installed with an adjusting bolt (39) in the middle, and the adjusting bolt (39) is threadedly connected with the second connecting rod (12) for adjusting the height position of the limiting rod (38).

5. An orthopaedic splint fixation device according to any one of claims 1-4, wherein, The hub assembly comprises: The U-shaped connecting rod (17) is symmetrical and arranged between the small arm restraint shell (1) and the large arm restraint shell (2), and the U-shaped connecting rod (17) is rotatably connected with a shaft sleeve (18) at both ends, and one of the shaft sleeves (18) is fixedly connected with the small arm restraint shell (1); The first connecting rod (7) is symmetrical and fixed on the outer side of the large arm restraint shell (2), and one end of the first connecting rod (7) is fixedly connected with the other shaft sleeve (18); The transmission structure is arranged in the middle of one of the U-shaped connecting rods (17) for driving or locking the rotation between the U-shaped connecting rod (17) and the shaft sleeve (18).

6. An orthopaedic splint fixation device according to claim 5, wherein: The transmission structure comprises: The half gear (21) is arranged on the shaft sleeve (18); The full gear (22) is rotatably installed in the middle of the first connecting rod (7), and the full gear (22) is meshed with the half gear (21); The operation box (15) is fixedly connected with the first connecting rod (7) in the middle, and the inner gear (33) is fixedly arranged on one end of the operation box (15) close to the full gear (22), and the other end of the operation box (15) is provided with a through hole (31), and the sleeve (30) is slidably arranged in the through hole (31), one end of the sleeve (30) is provided with a driving disc (29), and the other end of the sleeve (30) extends into the operation box (15) and is provided with a push plate (10), and the third limiting tooth (34) is fixedly arranged on the push plate (10); The shaft of the full gear (22) extends into the operation box (15) and is fixedly provided with a guide column (32), and the guide column (32) is slidably connected with the inner wall of the sleeve (30).

7. An orthopaedic splint fixation device according to claim 6, wherein: The first reset spring (35) is installed between the push plate (10) and the through hole (31) outside the sleeve (30), one end of the first reset spring (35) is provided with a connecting ring, and the connecting ring is rotationally connected with the push plate (10).

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