A single-arm orthopedic external fixation support device and a method for adjusting the same

Abstract

A single-arm orthopedic external fixation support device and its adjusting method belong to the technical field of traction equipment and solve the technical problem of rapid growth of bone tissue in the late fracture healing period. The device comprises a fixed pressurizing module, a fine-tuning pressurizing assembly and a universal ball hinge module fixedly arranged on corresponding sliding bases respectively. The fixed pressurizing module and the universal ball hinge module are movably connected through a movable connecting module. The fine-tuning pressurizing assembly accurately adjusts the distance between the fixed pressurizing module and the universal ball hinge module. The device realizes strong fixation in the early stage of bone healing, and the bone tissue is stimulated passively to meet the basic functions of a conventional single-arm orthopedic external fixation support frame. In the late fracture healing period (loosen the locking bolt), the fixed pressurizing module and the universal ball hinge module can reciprocally slide relative to the movable connecting module to realize stable stress stimulation and promote bone tissue healing, thereby shortening the fracture healing period.

Description

Technical Field

[0001] This invention belongs to the field of traction equipment technology, specifically relating to a single-arm orthopedic external fixation support device and its adjustment method. Background Technology

[0002] Fractures of the limbs have the highest incidence rate. Clinically, treatment methods mainly include non-surgical and surgical treatments. Non-surgical treatment primarily involves external fixation using reduction splints or plaster casts. Surgical treatments commonly include open reduction and internal fixation, as well as minimally invasive external fixation. A single-arm orthopedic external fixator involves inserting positioning pins through the skin at both ends of the fracture line. These pins are then connected to the exposed ends of the positioning pins via connecting arms with clamps at both ends. In other words, the clamps at both ends of the connecting arm are connected to the exposed ends of the positioning pins, thereby achieving reduction and fixation of the fracture.

[0003] Various external fixation devices already exist in the prior art. For example, patent document "A Single-Arm Orthopedic External Fixation Device" (authorization announcement number: CN 219331856 U, authorization announcement date: 2023.07.14) discloses a technical solution where the movable arm swings horizontally and vertically under the action of a bidirectional rotation device. Another example is patent document "Motion-Type Adjustable Fracture Reduction External Fixator" (application publication number: CN 108523974 A, application publication date: 2018.09.14), which discloses a main adjustment rod including a movable rod and a sleeve slidably fitted at one end of the movable rod, allowing the movable rod to extend into or out of the sleeve to adjust the length of the main adjustment rod, thereby adjusting the distance between the two-end pin fixing blocks for easy adjustment. Yet another example is patent document "A Traction Positioning Fixation Mechanism" (application publication number: CN 118873227). Application A (Publication Date: 2024.11.01) discloses a method that uses the relative movement of two positioning rod seats on a slide rod to achieve simple and efficient adjustment of the position and angle of each positioning rod on the positioning rod seat assembly, thereby quickly and accurately achieving traction and positioning of injured tissue.

[0004] Therefore, existing external fixation technologies often focus on fixation during fracture healing, specifically how to quickly, flexibly, and accurately adjust the spatial angle of the external fixator to achieve stable fixation of the fracture healing position. However, they neglect the adjustment of the external fixator in response to the bone tissue recovery needs in the later stages of fracture healing. According to common knowledge in the field, in the later stages of fracture healing, reducing stress shielding and enabling self-stress stimulation can promote bone tissue growth. However, existing technologies typically maintain stable fixation throughout fracture healing, failing to eliminate stress shielding that develops later and failing to achieve the self-stress stimulation function. Summary of the Invention

[0005] The main objective of this invention is to overcome the shortcomings of the prior art and provide a single-arm orthopedic external fixation support device and its adjustment method to promote rapid bone tissue growth in the later stage of fracture healing.

[0006] This invention is achieved through the following technical solution: a single-arm orthopedic external fixation support device, comprising a fixed pressure module, a fine-tuning pressure component, and a universal ball joint module, wherein the fixed pressure module, the fine-tuning pressure component, and the universal ball joint module are respectively fixedly mounted on corresponding sliding bases, the fixed pressure module and the universal ball joint module are arranged opposite to each other, and in use, the fixed pressure module and the universal ball joint module are located in the same vertical plane, the fine-tuning pressure component is movably connected to the fixed pressure module, and the fine-tuning pressure component is located on the side away from the universal ball joint module, and the fixed pressure module and the universal ball joint module are movably connected through a movable connection module;

[0007] The movable connection module includes a connecting base, a pressure plate, guide rails, and flexible spheres. Four sets of guide blind holes are symmetrically arranged at the beginning and end of the connecting base. Locking bolts are installed on the connecting base between the two sets of guide blind holes at the beginning and the two sets at the end. Notches are provided at both ends of the connecting base. The pressure plate is installed at the corresponding notch position via the locking bolts. A limiting groove is provided across the contact surface between the pressure plate and the notch, with the diameter of the limiting groove equal to the diameter of the guide blind hole. The flexible spheres are respectively installed at the bottom of the corresponding guide blind holes. The four guide rails are detachably inserted into the corresponding guide blind holes. The ends of the guide rails inside the guide blind holes press against the flexible spheres. The guide rails outside the connecting base are engaged in the limiting grooves between the pressure plate and the connecting base. When the locking bolts are tightened, the locking bolts press the guide rails onto the connecting base via the pressure plate.

[0008] Furthermore, the two sets of guide blind holes at the beginning of the connecting base are parallel to each other, and the two sets of guide blind holes at the end of the connecting base are parallel to each other. The guide blind holes at the beginning of the connecting base and the corresponding guide blind holes at the end of the connecting base are coaxially arranged.

[0009] Furthermore, an elongated oval groove is provided in the middle of the connecting base to reduce the weight of the connecting base.

[0010] Furthermore, the guide rail is made of carbon fiber rod, and the flexible sphere is made of rubber or silicone.

[0011] Furthermore, the sliding base includes an upper clamping plate and a lower clamping plate. Two sets of sliding grooves are arranged parallel to each other along the length of the sliding base at the seam position on the opposite surfaces of the upper and lower clamping plates. A first threaded through hole is provided on the lower clamping plate between the sliding grooves, and a first threaded blind hole is provided on the upper clamping plate at the position corresponding to the first threaded through hole. A first bolt passes through the first threaded through hole and is detachably screwed into the first threaded blind hole, thereby adjusting the distance between the upper and lower clamping plates. When the first bolt passes through the first threaded through hole and is screwed out of the first threaded blind hole, the distance between the upper and lower clamping plates increases, and the sliding base slides along the guide rail or separates from the guide rail. When the first bolt passes through the first threaded through hole and is screwed into the first threaded blind hole, the distance between the upper and lower clamping plates decreases, the upper and lower clamping plates clamp the guide rail, and the sliding base remains relatively stationary with respect to the guide rail.

[0012] Furthermore, the fixed pressure module includes a first positioning pin fixing seat and a first positioning pin pressure plate. The first positioning pin fixing seat is fixedly installed on the upper clamping plate of the corresponding sliding base. The first positioning pin pressure plate is disposed above the first positioning pin fixing seat. At least two sets of first positioning pin slots are arranged parallel to each other along the width direction of the fixed pressure module at the seam position of the opposite surfaces of the first positioning pin fixing seat and the first positioning pin pressure plate. A second threaded blind hole is provided on the first positioning pin fixing seat between two adjacent sets of first positioning pin slots. A second threaded through hole is provided on the first positioning pin pressure plate at the position corresponding to the second threaded blind hole. A second bolt passes through the second threaded through hole and is detachably screwed into the second threaded blind hole, thereby adjusting the distance between the first positioning pin fixing seat and the first positioning pin pressure plate. When the second bolt passes through the second threaded through hole and is screwed into the second threaded blind hole, the first positioning pin pressure plate and the first positioning pin fixing seat hold the positioning pin tightly. When the second bolt passes through the second threaded through hole and is screwed out of the second threaded blind hole, the distance between the first positioning pin pressure plate and the first positioning pin fixing seat increases, and the first positioning pin pressure plate and the first positioning pin fixing seat release the positioning pin.

[0013] Furthermore, the fine-tuning pressure assembly includes an adjusting base, an adjusting bolt, and a scale. The adjusting base is fixedly installed on the upper clamping plate of the corresponding sliding base, and a light hole is provided along the length direction of the adjusting base. The adjusting bolt passes through the light hole and is threadedly connected to the side wall of the first positioning pin fixing seat. The scale is fixedly installed on the front or rear side wall of the adjusting base, and the free end of the scale extends to the position of the first positioning pin fixing seat. The scale lines on the scale are used to indicate the distance between the side walls of the adjusting base and the first positioning pin fixing seat.

[0014] Furthermore, the universal ball joint module includes a ball head base assembly and a swing arm assembly. The ball head base assembly includes a ball head base, a ball head connecting rod, a clamping washer, and a clamping nut. The ball head connecting rod includes a ball head and a screw. The screw is fixedly installed on the outer wall of the ball head and is arranged along the radial direction of the ball head. The ball head base is fixedly installed on the upper clamping plate of the corresponding sliding base. A threaded hole is provided at the end of the ball head base away from the fixed pressure module, and a spherical cavity is provided at the end of the ball head base close to the fixed pressure module. The threaded hole communicates with the spherical cavity. The clamping nut is threadedly connected to the threaded hole of the ball head base. The ball head is detachably installed in the spherical cavity. The screw extends to the outside of the ball head base. The clamping washer is provided between the clamping nut and the ball head. The inner circular surface of the clamping washer is set as a spherical surface that mates with the ball head.

[0015] The swing arm assembly includes a second positioning pin fixing seat and a second positioning pin pressure plate. The second positioning pin fixing seat is L-shaped, and its vertical part is threadedly connected to a screw. The second positioning pin fixing seat is hinged to a ball joint base via a ball joint connecting rod. The side wall of the ball joint base serves as the limiting plane for the swing of the second positioning pin fixing seat. The second positioning pin pressure plate is positioned above the horizontal part of the second positioning pin fixing seat. At least two sets of second positioning pin slots are arranged parallel to each other along the width direction of the swing arm assembly at the seam position between the opposing surfaces of the second positioning pin fixing seat and the second positioning pin pressure plate. The second positioning pin fixing... A third threaded blind hole is provided on the base, and a third threaded through hole is provided on the second positioning pin pressure plate at the corresponding position of the third threaded blind hole. A third bolt passes through the third threaded through hole and is detachably screwed into the third threaded blind hole, thereby adjusting the distance between the second positioning pin fixing seat and the second positioning pin pressure plate. When the third bolt passes through the third threaded through hole and is screwed into the third threaded blind hole, the second positioning pin pressure plate and the second positioning pin fixing seat hold the positioning pin tightly. When the third bolt passes through the third threaded through hole and is screwed out of the third threaded blind hole, the distance between the second positioning pin pressure plate and the second positioning pin fixing seat increases, and the second positioning pin pressure plate and the second positioning pin fixing seat release the positioning pin.

[0016] The significant difference between this invention and the prior art lies in the creative design of the guide rail as a segmented structure. That is, the guide rails connected to the fixed pressure module and the universal ball joint module are discontinuous. On this basis, the guide rails are connected by a movable connecting module. Thus, in the later stage of fracture healing, by loosening the locking bolts, the fixed pressure module and its connected guide rails, as well as the universal ball joint module and its connected guide rails, can slide back and forth relative to the movable connecting module. The fixed pressure module and the universal ball joint module achieve reciprocating stress stimulation at the bone tissue growth location through their own gravity via corresponding positioning pins. At the same time, the movable connecting module also has anti-torsion and anti-bending functions.

[0017] Furthermore, the spacing between adjacent positioning pin slots is set according to the diameter of the positioning pin and the actual usage conditions.

[0018] The adjustment method of the single-arm orthopedic external fixation support device described above is adopted, wherein:

[0019] Fixed state: The guide rails are installed at the bottom of the guide blind holes and press the flexible ball together. The fixed pressure module and the universal ball joint module slide along the corresponding guide rails to the predetermined positions. The distance between the fixed pressure module and the movable connection module is finely adjusted by rotating the adjusting bolts. Then, the locking bolts are tightened. The fixed pressure module, universal ball joint module, and movable connection module are fixed in position with their corresponding guide rails, and the single-arm orthopedic external fixation support device remains fixed. This achieves the basic functions of a conventional single-arm orthopedic external fixation support frame and meets the function of fixing the fracture site in the early stage of fracture healing.

[0020] Active connection state: Loosen the locking bolts, and the guide rail slides back and forth along the corresponding guide blind hole. The fixed pressure module and the universal ball joint module are movably connected to the active connection module through the corresponding guide rails. The single-arm orthopedic external fixation support no longer has the function of fixation, but only plays the guiding role of preventing torsion and deflection. The growth point repeatedly bears the tensile and compressive forces, promoting bone tissue growth.

[0021] The beneficial effects of this invention are as follows: Based on the principle of "post-fracture stress stimulation," this invention creatively sets the guide rails connected to the fixation and compression module and the universal ball joint module as a discontinuous segmented structure. In the early stage of fracture healing, it can meet the fixation requirements of the fracture site (the locking bolts are in the locked state). In this state, this invention can achieve the basic functions of a conventional single-arm orthopedic external fixation support frame, realizing strong fixation and passive stress stimulation in the early stage of bone healing. In the later stage of fracture healing, after loosening the locking bolts, the fixation and compression module and the universal ball joint module only undertake the functions of anti-torsion and anti-bending. The fixation and compression module and its connected guide rails, as well as the universal ball joint module and its connected guide rails, can slide back and forth relative to the movable connecting module to achieve their own stress stimulation, promote bone tissue healing, and shorten the fracture healing period. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the single-arm orthopedic external fixation support device of the present invention;

[0023] Figure 2 This is a schematic diagram of the main structure of the single-arm orthopedic external fixation support device of the present invention;

[0024] Figure 3 This is a top view of the single-arm orthopedic external fixation support device of the present invention.

[0025] Figure 4 This is a bottom view of the single-arm orthopedic external fixation support device of the present invention.

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the ball head base assembly;

[0027] Figure 6 This is a schematic diagram of the front sectional view of the ball head base assembly;

[0028] Figure 7 A three-dimensional structural diagram of the active connection module;

[0029] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure from the middle AA plane.

[0030] In the figure, 1 is the fixed pressure module, 1-1 is the first positioning pin fixing seat, 1-2 is the first positioning pin pressure plate, 1-3 is the first positioning pin slot, and 1-4 is the second bolt;

[0031] 2 is the fine-tuning pressure component, 2-1 is the adjustment base, 2-2 is the adjustment bolt, and 2-3 is the scale.

[0032] 3 is the universal ball joint module, 3-1 is the ball head base assembly, 3-1-1 is the ball head base with second positioning pin slot, 3-1-2 is the ball head connecting rod, 3-1-21 is the ball head, 3-1-22 is the screw, 3-1-3 is the clamping washer, and 3-1-4 is the clamping nut; 3-2 is the swing arm assembly, 3-2-1 is the second positioning pin fixing seat, 3-2-2 is the second positioning pin pressure plate, 3-2-3 is the second positioning pin slot, and 3-2-4 is the third bolt;

[0033] 4 is the sliding base, 4-1 is the upper clamping plate, 4-2 is the lower clamping plate, 4-3 is the sliding groove, 4-4 is the first bolt, 4-5 is the first threaded through hole, and 4-6 is the first threaded blind hole.

[0034] 5 is the movable connection module, 5-1 is the connection base, 5-2 is the pressure plate, 5-3 is the guide rail, 5-4 is the flexible ball, 5-5 is the guide blind hole, 5-6 is the locking bolt, 5-7 is the limit slot, and 5-8 is the oblong through slot. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 4The single-arm orthopedic external fixation support device shown includes a fixed pressure module 1, a fine-tuning pressure component 2, and a universal ball joint module 3. The fixed pressure module 1, the fine-tuning pressure component 2, and the universal ball joint module 3 are respectively fixedly mounted on corresponding sliding bases 4. The fixed pressure module 1 and the universal ball joint module 3 are arranged opposite each other, and in use, they are located in the same vertical plane. The fine-tuning pressure component 2 is movably connected to the fixed pressure module 1 and is located on the side away from the universal ball joint module 3. The fixed pressure module 1 and the universal ball joint module 3 are movably connected via a movable connection module 5.

[0037] like Figure 7 and Figure 8 As shown, the movable connection module 5 includes a connecting base 5-1, a pressure plate 5-2, a guide rail 5-3, and a flexible sphere 5-4. The guide rail 5-3 is made of carbon fiber rod, and the flexible sphere 5-4 is made of rubber or silicone with a certain supporting strength. An elongated oval through groove 5-8 is provided in the middle of the connecting base 5-1 to reduce the weight of the connecting base 5-1. Four sets of guide blind holes 5-5 are symmetrically arranged at the beginning and end of the connecting base 5-1. Locking bolts 5-6 are respectively provided on the connecting base 5-1 between the two sets of guide blind holes 5-5 at the beginning and the two sets of guide blind holes 5-5 at the end. Notches are provided at the beginning and end of the connecting base 5-1, and the pressure plate 5-2 is open. The locking bolt 5-6 is installed at the corresponding notch position. A limiting groove 5-7 is provided at the contact surface of the pressure plate 5-2 and the notch. The diameter of the limiting groove 5-7 is equal to the diameter of the guide blind hole 5-5. The flexible spheres 5-4 are respectively installed at the bottom of the corresponding guide blind holes 5-5. The four guide rails 5-3 are respectively detachably inserted into the corresponding guide blind holes 5-5. The ends of the guide rails 5-3 inside the guide blind holes 5-5 press against the flexible spheres 5-4. The guide rails 5-3 outside the connecting base 5-1 are clamped in the limiting groove 5-7 between the pressure plate 5-2 and the connecting base 5-1. When the locking bolt 5-6 is tightened, the locking bolt 5-6 presses the guide rails 5-3 onto the connecting base 5-1 through the pressure plate 5-2.

[0038] Furthermore, the two sets of guide blind holes 5-5 at the beginning of the connecting base 5-1 are parallel to each other, and the two sets of guide blind holes 5-5 at the end of the connecting base 5-1 are parallel to each other. The guide blind holes 5-5 at the beginning of the connecting base 5-1 and the corresponding guide blind holes 5-5 at the end of the connecting base 5-1 are coaxially arranged.

[0039] Furthermore, the sliding base 4 includes an upper clamping plate 4-1 and a lower clamping plate 4-2. Two sets of sliding grooves 4-3 are arranged parallel to each other along the length of the sliding base at the seam position on the opposite sides of the upper clamping plate 4-1 and the lower clamping plate 4-2. A first threaded through hole 4-5 is provided on the lower clamping plate 4-2 between the sliding grooves 4-3. A first threaded blind hole 4-6 is provided on the upper clamping plate 4-1 at the position corresponding to the first threaded through hole 4-5. A first bolt 4-4 passes through the first threaded through hole 4-5 and is detachably screwed into the first threaded blind hole 4-6, thereby adjusting the distance between the upper clamping plate 4-1 and the lower clamping plate 4-2.

[0040] Furthermore, the fixed pressure module 1 includes a first positioning pin fixing seat 1-1 and a first positioning pin pressure plate 1-2. The first positioning pin fixing seat 1-1 is fixedly installed on the upper clamping plate 4-1 of the corresponding sliding base 4. The first positioning pin pressure plate 1-2 is disposed above the first positioning pin fixing seat 1-1. At least two sets of first positioning pin slots 1-3 are arranged parallel to each other along the width direction of the fixed pressure module 1 at the seam position of the opposite surfaces of the first positioning pin fixing seat 1-1 and the first positioning pin pressure plate 1-2. A second threaded blind hole is provided on the first positioning pin fixing seat 1-1 between two adjacent sets of first positioning pin slots 1-3. A second threaded through hole is provided on the first positioning pin pressure plate 1-2 at the position corresponding to the second threaded blind hole. A second bolt 1-4 passes through the second threaded through hole and is detachably screwed into the second threaded blind hole, thereby adjusting the distance between the first positioning pin fixing seat 1-1 and the first positioning pin pressure plate 1-2.

[0041] Furthermore, the fine-tuning pressure assembly 2 includes an adjusting base 2-1, an adjusting bolt 2-2, and a scale 2-3. The adjusting base 2-1 is fixedly installed on the upper clamping plate 4-1 of the corresponding sliding base 4. A light hole is provided along the length direction of the adjusting base 2-1. The adjusting bolt 2-2 passes through the light hole and is threadedly connected to the side wall of the first positioning pin fixing seat 1-1. The scale 2-3 is fixedly installed on the front or rear side wall of the adjusting base 2-1, and the free end of the scale 2-3 extends to the position of the first positioning pin fixing seat 1-1. The scale lines on the scale 2-3 are used to indicate the distance between the side walls of the adjusting base 2-1 and the first positioning pin fixing seat 1-1.

[0042] Furthermore, the universal ball joint module 3 includes a ball joint base assembly 3-1 and a swing arm assembly 3-2, wherein the ball joint base assembly 3-1 (e.g., Figure 5 and Figure 6(As shown) includes a ball head base 3-1-1, a ball head connecting rod 3-1-2, a clamping washer 3-1-3, and a clamping nut 3-1-4. The ball head connecting rod 3-1-2 includes a ball head 3-1-21 and a screw 3-1-22. The screw 3-1-22 is fixedly installed on the outer wall of the ball head 3-1-21 and is arranged along the radial direction of the ball head 3-1-21. The ball head base 3-1-1 is fixedly installed on the upper clamping plate 4-1 of the corresponding sliding base. The end of the ball head base 3-1-1 away from the fixed pressure module 1 is located... A threaded hole is provided at one end of the ball head base 3-1-1 near the fixed pressure module 1, and a spherical cavity is provided. The threaded hole communicates with the spherical cavity. The clamping nut 3-1-4 is threadedly connected to the threaded hole of the ball head base 3-1-1. The ball head 3-1-21 is detachably installed in the spherical cavity. The screw 3-1-22 extends to the outside of the ball head base 3-1-1. The clamping washer 3-1-3 is provided between the clamping nut 3-1-4 and the ball head. The inner circular surface of the clamping washer 3-1-3 is set as a spherical surface that mates with the ball head 3-1-21.

[0043] Further, the swing arm assembly 3-2 includes a second positioning pin fixing seat 3-2-1 and a second positioning pin pressure plate 3-2-2. The second positioning pin fixing seat 3-2-1 is L-shaped, and its vertical part is threadedly connected to the screw 3-1-22. The second positioning pin fixing seat 3-2-1 is hinged to the ball head base 3-1-1 via a ball head connecting rod 3-1-2. The side wall of the ball head base 3-1-1 serves as the limiting plane for the swing of the second positioning pin fixing seat 3-2-1. The second positioning pin pressure plate 3-2-2 is positioned above the horizontal part of the second positioning pin fixing seat 3-2-1, and is located above the second positioning pin fixing seat 3-2-1. At least two sets of second positioning pin slots 3-2-3 are arranged parallel to the width direction of the swing arm assembly 3-2 at the seam position of the opposite side of the pin fixing seat 3-2-1 and the second positioning pin pressure plate 3-2-2. A third threaded blind hole is provided on the second positioning pin fixing seat 3-2-1 between two adjacent sets of second positioning pin slots 3-2-3. A third threaded through hole is provided on the second positioning pin pressure plate 3-2-2 at the position corresponding to the third threaded blind hole. A third bolt 3-2-4 passes through the third threaded through hole and is detachably screwed into the third threaded blind hole, thereby adjusting the distance between the second positioning pin fixing seat 3-2-1 and the second positioning pin pressure plate 3-2-2.

[0044] Furthermore, the spacing between adjacent positioning pin slots is set according to the diameter of the positioning pin and the actual usage conditions. In this embodiment, a set of positioning pin slots is provided at both the beginning and end of the fixed pressure module 1 and the swing arm assembly 3-2, and three sets of positioning pin slots are equally spaced in the middle of the fixed pressure module 1 or the swing arm assembly 3-2 inside the positioning pin slots at both the beginning and end. In actual use, the positioning pin can be inserted into the fractured bone through one or more positioning pin slots.

[0045] The adjustment method of the single-arm orthopedic external fixation support device is characterized by:

[0046] Fixed state: Guide rails 5-3 are respectively installed at the bottom of guide blind holes 5-5 and press against flexible ball 5-4. Fixed pressure module 1 and universal ball joint module 3 slide along the corresponding guide rails 5-3 to the predetermined positions. The distance between fixed pressure module 1 and movable connection module 5 is finely adjusted by rotating adjusting bolt 2-2. Then, tighten locking bolt 5-6. Fixed pressure module 1, universal ball joint module 3 and movable connection module 5 are fixed in position with the corresponding guide rails 5-3, and the single-arm orthopedic external fixation support device is fixed. According to the bone recovery, the distance between fixed pressure module 1 and universal ball joint module 3 is precisely adjusted by adjusting bolt 2-2 at each stage according to the doctor's orders. This state is usually used in the early stage of fracture healing, where bone tissue is passively stressed to achieve the basic function of conventional single-arm orthopedic external fixation support frame and meet the fixation of fracture site in the early stage of fracture healing.

[0047] Active connection state: Loosen the locking bolt 5-6, and the guide rail 5-3 slides back and forth along the corresponding guide blind hole 5-5. The fixed pressure module 1 and the universal ball joint module 3 are movably connected to the active connection module 5 through the corresponding guide rail 5-3. This state is usually used in the later stage of fracture healing, that is, when a relatively stable connection has been established between the broken bones. At this time, the fixed pressure module 1 and the universal ball joint module 3 can slide relative to the active connection module 5. The flexible ball 5-4 plays a supporting and rebounding role, and the active connection module 5 plays a guiding role to prevent bending, twisting and deflection. The broken bone position alternately bears repeated tensile and compressive forces, stably realizes its own stress stimulation, and accelerates bone tissue healing.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A single-arm orthopedic external fixation support device, comprising a fixation and compression module (1), a fine-tuning compression assembly (2), and a universal ball joint module (3), characterized in that, The fixed pressurization module (1), the fine-tuning pressurization component (2) and the universal ball joint module (3) are respectively fixedly mounted on the corresponding sliding base (4). The fixed pressurization module (1) and the universal ball joint module (3) are arranged opposite to each other. In the use state, the fixed pressurization module (1) and the universal ball joint module (3) are located in the same vertical plane. The fine-tuning pressurization component (2) is movably connected to the fixed pressurization module (1). The fine-tuning pressurization component (2) is located on the side away from the universal ball joint module (3). The fixed pressurization module (1) and the universal ball joint module (3) are movably connected through the movable connection module (5). The movable connection module (5) includes a connecting base (5-1), a pressure plate (5-2), a guide rail (5-3), and a flexible sphere (5-4). Four sets of guide blind holes (5-5) are symmetrically arranged at the beginning and end of the connecting base (5-1). Locking bolts (5-6) are respectively installed on the connecting base (5-1) between the two sets of guide blind holes (5-5) at the beginning and the connecting base (5-1) between the two sets of guide blind holes (5-5) at the end. Notches are provided at the beginning and end of the connecting base (5-1). The pressure plate (5-2) is installed at the corresponding notch position via the locking bolts (5-6). A limiting groove (5-6) is provided across the seam at the contact surface between the pressure plate (5-2) and the notch. 7) The diameter of the limiting slot (5-7) is equal to the diameter of the guide blind hole (5-5); the flexible sphere (5-4) is installed at the bottom of the corresponding guide blind hole (5-5), and the four guide rails (5-3) are detachably inserted into the corresponding guide blind hole (5-5). The ends of the guide rails (5-3) in the guide blind hole (5-5) squeeze the flexible sphere (5-4). The guide rails (5-3) outside the connecting base (5-1) are clamped in the limiting slot (5-7) between the pressure plate (5-2) and the connecting base (5-1). When the locking bolt (5-6) is tightened, the locking bolt (5-6) presses the guide rail (5-3) onto the connecting base (5-1) through the pressure plate (5-2). When the single-arm orthopedic external fixation support device is in a fixed state, the guide rails (5-3) are respectively installed at the bottom of the guide blind hole (5-5) and press the flexible ball (5-4). The fixed pressure module (1) and the universal ball joint module (3) slide along the corresponding guide rail (5-3) to the predetermined position. The distance between the fixed pressure module (1) and the movable connection module (5) is finely adjusted by rotating the adjusting bolt (2-2). Then the locking bolt (5-6) is tightened. The fixed pressure module (1), the universal ball joint module (3) and the movable connection module (5) are fixed to the corresponding guide rail (5-3) respectively, and the single-arm orthopedic external fixation support device remains in a fixed state. When the single-arm orthopedic external fixation support device is in the movable connection state, loosen the locking bolt (5-6), and the guide rail (5-3) slides back and forth along the corresponding guide blind hole (5-5). The fixed pressure module (1) and the universal ball joint module (3) are movably connected to the movable connection module (5) through the corresponding guide rail (5-3).

2. The single-arm orthopedic external fixation support device according to claim 1, characterized in that: The two sets of guide blind holes (5-5) at the beginning of the connecting base (5-1) are parallel to each other, and the two sets of guide blind holes (5-5) at the end of the connecting base (5-1) are parallel to each other. The guide blind hole (5-5) at the beginning of the connecting base (5-1) and the guide blind hole (5-5) at the end of the connecting base (5-1) are coaxially arranged.

3. The single-arm orthopedic external fixation support device according to claim 1, characterized in that: The connecting base (5-1) is provided with an elongated through groove (5-8) in the middle.

4. The single-arm orthopedic external fixation support device according to claim 1, characterized in that: The guide rail (5-3) is made of carbon fiber rod, and the flexible sphere (5-4) is made of rubber or silicone.

5. A single-arm orthopedic external fixation support device according to claim 1, characterized in that: The sliding base (4) includes an upper clamping plate (4-1) and a lower clamping plate (4-2). Two sets of sliding grooves (4-3) are arranged parallel to each other along the length of the sliding base at the seam position on the opposite side of the upper clamping plate (4-1) and the lower clamping plate (4-2). A first threaded through hole (4-5) is provided on the lower clamping plate (4-2) between the sliding grooves (4-3). A first threaded blind hole (4-6) is provided on the upper clamping plate (4-1) at the position corresponding to the first threaded through hole (4-5). A first bolt (4-4) passes through the first threaded through hole (4-5) and is detachably screwed into the first threaded blind hole (4-6) to adjust the distance between the upper clamping plate (4-1) and the lower clamping plate (4-2).

6. The single-arm orthopedic external fixation support device according to claim 1, characterized in that: The fixed pressure module (1) includes a first positioning pin fixing seat (1-1) and a first positioning pin pressure plate (1-2). The first positioning pin fixing seat (1-1) is fixedly installed on the upper clamping plate (4-1) of the corresponding sliding base (4). The first positioning pin pressure plate (1-2) is set above the first positioning pin fixing seat (1-1). At least two sets of first positioning pin slots (1-3) are arranged parallel to each other along the width direction of the fixed pressure module (1) at the seam position of the opposite surfaces of the first positioning pin fixing seat (1-1) and the first positioning pin pressure plate (1-2). A second threaded blind hole is provided on the first positioning pin fixing seat (1-1) between two adjacent sets of first positioning pin slots (1-3). A second threaded through hole is provided on the first positioning pin pressure plate (1-2) at the position corresponding to the second threaded blind hole. A second bolt (1-4) passes through the second threaded through hole and is detachably screwed into the second threaded blind hole, thereby adjusting the distance between the first positioning pin fixing seat (1-1) and the first positioning pin pressure plate (1-2).

7. A single-arm orthopedic external fixation support device according to claim 1, characterized in that: The fine-tuning pressure assembly (2) includes an adjustment base (2-1), an adjustment bolt (2-2), and a scale (2-3). The adjustment base (2-1) is fixedly installed on the upper clamping plate (4-1) of the corresponding sliding base (4). A light hole is provided along the length direction of the adjustment base (2-1). The adjustment bolt (2-2) passes through the light hole and is threadedly connected to the side wall of the first positioning pin fixing seat (1-1). The scale (2-3) is fixedly installed on the front or rear side wall of the adjustment base (2-1), and the free end of the scale (2-3) extends to the position of the first positioning pin fixing seat (1-1). The scale lines on the scale (2-3) are used to indicate the distance between the side walls of the adjustment base (2-1) and the first positioning pin fixing seat (1-1).

8. A single-arm orthopedic external fixation support device according to claim 1, characterized in that: The universal ball joint module (3) includes a ball head base assembly (3-1) and a swing arm assembly (3-2). The ball head base assembly (3-1) includes a ball head base (3-1-1), a ball head connecting rod (3-1-2), a clamping washer (3-1-3), and a clamping nut (3-1-4). The ball head connecting rod (3-1-2) includes a ball head (3-1-21) and a screw (3-1-22). The screw (3-1-22) is fixedly installed on the outer wall of the ball head (3-1-21) and is arranged along the radial direction of the ball head (3-1-21). The ball head base (3-1-1) is fixedly installed on the upper clamping plate (4-1) of the corresponding sliding base. A threaded hole is provided at the end of the head base (3-1-1) away from the fixed pressurization module (1), and a spherical cavity is provided at the end of the ball head base (3-1-1) close to the fixed pressurization module (1). The threaded hole communicates with the spherical cavity. The clamping nut (3-1-4) is threadedly connected to the threaded hole of the ball head base (3-1-1). The ball head (3-1-21) is detachably installed in the spherical cavity. The screw (3-1-22) extends to the outside of the ball head base (3-1-1). The clamping washer (3-1-3) is provided between the clamping nut (3-1-4) and the ball head. The inner circular surface of the clamping washer (3-1-3) is set as a spherical surface that mates with the ball head (3-1-21). The swing arm assembly (3-2) includes a second positioning pin holder (3-2-1) and a second positioning pin pressure plate (3-2-2). The second positioning pin holder (3-2-1) is L-shaped, and its vertical part is threadedly connected to a screw (3-1-22). The second positioning pin holder (3-2-1) is hinged to a ball head base (3-1-1) via a ball head connecting rod (3-1-2). The side wall of the ball head base (3-1-1) serves as the limiting plane for the swing of the second positioning pin holder (3-2-1). The second positioning pin pressure plate (3-2-2) is positioned above the horizontal part of the second positioning pin holder (3-2-1), and is located above the second positioning pin holder (3-2-1). At least two sets of second positioning pin slots (3-2-3) are arranged parallel to each other along the width direction of the swing arm assembly (3-2) at the seam position of the pin fixing seat (3-2-1) and the second positioning pin pressure plate (3-2-2) opposite to each other. A third threaded blind hole is provided on the second positioning pin fixing seat (3-2-1) between two adjacent sets of second positioning pin slots (3-2-3). A third threaded through hole is provided on the second positioning pin pressure plate (3-2-2) at the position corresponding to the third threaded blind hole. A third bolt (3-2-4) passes through the third threaded through hole and is detachably screwed into the third threaded blind hole, thereby adjusting the distance between the second positioning pin fixing seat (3-2-1) and the second positioning pin pressure plate (3-2-2).

9. A single-arm orthopedic external fixation support device according to claim 6 or 8, characterized in that: The spacing between adjacent positioning pin slots is set according to the diameter of the positioning pin and the actual usage conditions.

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