Combined internal fracture fixing device

Abstract

The invention provides a combined fracture internal fixing device which comprises a fixing rod and a plurality of sets of sliding fixing pieces installed on the fixing rod in a sliding mode, torsion locking pieces are rotatably installed above the sliding fixing pieces, an upper half clamping cover is installed on one side of each torsion locking piece in a sliding mode, and a lower half clamping cover is installed on the other side of each torsion locking piece. The torsion locking piece is used for twisting the using direction of the upper half clamping cover, and the upper half clamping cover is used for eliminating installation deviation of surgical screws in a matched mode. The device can adapt to more operation schemes and can match differences caused by partial bone difference factors so as to solve the problems that an existing screw mounting hole site is often fixed in advance and cannot be adjusted, due to factors such as fracture parts and types of different patients and bone individual differences, the design of the fixing hole site is often difficult to accurately adapt, and the fixing hole site is difficult to adjust. And even a secondary operation is needed to adjust the fixing mode.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a combined fracture internal fixation device. Background Art

[0002] In the field of fracture treatment, internal fixation devices play a key role in promoting the healing of fracture sites. In traditional fracture internal fixation devices, the screw installation holes are often pre-fixed and cannot be adjusted. In actual clinical applications, due to factors such as the location and type of fractures in different patients and individual differences in bones, the design of such fixation holes is often difficult to accurately adapt. For example, when faced with complex fractures, doctors may encounter a mismatch between the holes in the existing internal fixation device and the actual position that needs to be fixed at the fracture, resulting in the inability to achieve the ideal fixation effect. This may not only affect the fracture healing process, but may also increase the difficulty and risk of the operation, and may even require a second operation to adjust the fixation method.

[0003] The innovation of this combined fracture internal fixation device is that it can adapt and adjust the screw installation hole position, which is expected to solve the shortcomings of the above-mentioned traditional devices and provide a more flexible and accurate solution for fracture treatment. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a combined fracture internal fixation device that can adapt to more surgical options and match the differences caused by some bone differences, so as to solve the problem that the existing screw installation holes are often pre-fixed and non-adjustable. Due to factors such as the location and type of fractures of different patients and individual bone differences, the design of such fixing holes is often difficult to accurately adapt and even requires a secondary operation to adjust the fixation method.

[0005] In order to achieve the above-mentioned object, the present invention is realized by the following technical scheme: a combined fracture internal fixation device, comprising a fixing rod and a plurality of groups of sliding fixing members slidably mounted on the fixing rod, a torsion locking member is rotatably mounted on the top of each of the plurality of sliding fixing members, an upper half clamping cover is slidably mounted on one side of the torsion locking member, the torsion locking member is used to twist the use direction of the upper half clamping cover, and the upper half clamping cover is used to cooperate to eliminate the installation deviation of the surgical screw; and further comprising: A fine-tuning locking mechanism is disposed in the upper clamping cover and is used to fine-tune the position between the upper clamping cover and the twist locking member and then lock and fix it; The screw tilting adapting mechanism is arranged inside the upper clamping cover and is used to adjust the tilting angle of the adapted surgical screw; The torsion angle locking assembly is arranged inside the torsion locking piece and is used to lock the torsion locking piece after the angle is adjusted.

[0006] Furthermore, the fine-tuning locking mechanism includes a sliding rod, a sliding rod locking bolt, a sliding rod locking hole and an adjustment hole. A lower half clamping cover is provided at the bottom of the upper half clamping cover. The sliding rod is symmetrically fixedly installed on the side of the lower half clamping cover close to the torsion locking piece. The sliding rod locking hole is opened inside the torsion locking piece and is located above the sliding rod. The sliding rod locking bolt is threadedly connected to the inside of the sliding rod locking hole. The adjustment hole is opened inside the torsion locking piece and slides with the sliding rod.

[0007] Furthermore, the screw tilt adaptation mechanism includes a sliding sleeve, a sleeve fixing bolt, a sliding groove and a sleeve locking hole. An adjustable bolt fixing sleeve is rotatably installed between the upper clamping cover and the lower clamping cover. Both ends of the adjustable bolt fixing sleeve are rotatably matched with the sliding sleeve. The sliding groove is symmetrically opened on the side where the upper clamping cover and the lower clamping cover are close to each other. The sliding sleeve is slidably installed inside the sliding groove. The sleeve locking hole is opened at the top of the sliding sleeve. The sleeve fixing bolt is threadedly connected to the inside of the sleeve locking hole. The bolt head of the sleeve fixing bolt is press-fitted with the top of the upper clamping cover.

[0008] Furthermore, the torsion angle locking assembly includes a position locking bolt and a locking nut, the position locking bolt is rotatably installed inside the torsion locking piece, and the locking nut is fixedly embedded in the bottom of the sliding fixing piece, and the bottom of the position locking bolt passes through the torsion locking piece and the sliding fixing piece from top to bottom in sequence and extends to the interior of the locking nut and is threadedly connected to the locking nut.

[0009] Furthermore, an adjustment groove is provided on the side of the top of the sliding fixing piece away from the torsion locking piece, a sliding bolt fixing sleeve is slidably installed on the left side of the sliding fixing piece, a fixing hole is provided on the side of the top of the sliding bolt fixing sleeve away from the torsion locking piece, and the fixing hole is used for fixing and installing with the bolt and the sliding fixing piece.

[0010] Furthermore, bolt movable grooves are provided on both sides of the top of the upper half clamping cover and above the sliding groove, and the bolt movable grooves are used in cooperation with the sleeve fixing bolts for sliding. Angle twisting openings are provided inside the upper half clamping cover and at the bottom of the lower half clamping cover, and the angle twisting openings are used in cooperation with the adjustable bolt fixing sleeve.

[0011] Furthermore, three groups of annular equidistantly distributed positioning holes are provided on the top of the upper half clamping cover, and three groups of annular equidistantly distributed connecting bolts are fixedly installed on the top of the lower half clamping cover, and the connecting bolts are threadedly connected to the positioning holes.

[0012] Furthermore, clamping grooves for slidingly matching the fixing rod are provided on both sides of the sliding fixing member.

[0013] Furthermore, the fixing rod and the sliding fixing piece are both made of stainless steel and coated with tricalcium phosphate bone cement, and the torsion locking piece, the upper clamping cover and the adjustable bolt fixing sleeve are both made of stainless steel and coated with hydroxyapatite.

[0014] Beneficial effects of the present invention: The present invention can flexibly adjust the position of the sliding fixture on the fixed rod according to the location and type of fracture of different patients by setting a fixed rod in combination with multiple sets of sliding fixtures installed slidably, so as to adapt to different fracture locations. At the same time, the position locking bolt in the torsion angle locking assembly cooperates with the locking nut to squeeze the torsion locking member and the sliding fixture, so that the clamping groove inside the sliding fixture is deformed to clamp the fixing rod, thereby achieving a stable fixation of the position of the sliding fixture, improving surgical efficiency, and expanding surgical plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of the three-dimensional structure of the torsion locking member; Figure 3 for Figure 2 A schematic diagram of a three-dimensional structure viewed from above; Figure 4 for Figure 2 Schematic diagram of the partial half-section three-dimensional structure; Figure 5 For the present invention Figure 4 Schematic diagram of the local explosion three-dimensional structure; Figure 6 It is a three-dimensional schematic diagram of the upper half of the clamping cover after twisting of the present invention; Figure 7 It is an exploded stereoscopic schematic diagram of the sliding fixing member of the present invention; Figure 8 It is a schematic diagram of a half-cut exploded three-dimensional structure of a sliding fixing member of the present invention; Fig. 9 It is a schematic diagram of the operation scheme of the present invention.

[0016] In the figure: 1. fixing rod; 2. sliding fixing piece; 201. adjusting groove; 202. clamping groove; 21. sliding bolt fixing sleeve; 2101. fixing hole; 3. torsion locking piece; 31. upper clamping cover; 3101. positioning hole; 3102. bolt movable groove; 3103. angle torsion mouth; 3301. connecting bolt; 32. adjustable bolt fixing sleeve; 3201. sliding sleeve; 3202. sleeve fixing bolt; 3203. sliding groove; 3204. sleeve locking hole; 33. lower clamping cover; 331. sliding rod; 332. sliding rod locking bolt; 333. sliding rod locking hole; 334. adjusting hole; 301. position locking bolt; 302. locking nut; 4. locking screw; 5. broken bone. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] See also Figure 1 and Figure 2 , Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the torsion locking member.

[0019] A combined fracture internal fixation device comprises a fixing rod 1 and a plurality of sliding fixing members 2 slidably mounted on the fixing rod 1, a torsion locking member 3 is rotatably mounted above the plurality of sliding fixing members 2, an upper clamping cover 31 is slidably mounted on one side of the torsion locking member 3, the torsion locking member 3 is used to twist the use direction of the upper clamping cover 31, and the upper clamping cover 31 is used to cooperate in eliminating the installation deviation of the surgical screws.

[0020] See also Figures 3 to 9 As shown, Figure 3 for Figure 2 A schematic diagram of a three-dimensional structure viewed from above; Figure 4 for Figure 2 Schematic diagram of the partial half-section three-dimensional structure; Figure 5 For the present invention Figure 4 Schematic diagram of the local explosion three-dimensional structure; Figure 6 It is a three-dimensional schematic diagram of the upper half of the clamping cover after twisting of the present invention; Figure 7 It is an exploded stereoscopic schematic diagram of the sliding fixing member of the present invention; Figure 8 It is a schematic diagram of a half-cut exploded three-dimensional structure of a sliding fixing member of the present invention; Fig. 9 It is a schematic diagram of the operation scheme of the present invention.

[0021] The cam 332 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The cam 333 is provided with a locking bolt 332 which is provided on the top of the upper clamping cover 31 and is used for locking the cam 333. The sliding rod 331 can cooperate with the adjustment hole 334 to slide and adjust inside the torsion locking piece 3, thereby changing the distance between the upper clamping cover 31 and the torsion locking piece 3, and then adapting to some installation spacings during the operation. At the same time, after the spacing is determined, the sliding rod locking bolt 332 can be twisted with an Allen wrench, and then the sliding rod locking bolt 332 cooperates with the sliding rod locking hole 333 to move downward and press the sliding rod 331, so that the sliding rod 331 is fixed, allowing orthopedic surgery to have more operating space.

[0022] The screw tilting adaptation mechanism is arranged inside the upper clamping cover 31 and is used to adjust the tilting angle of the adapted surgical screw; the screw tilting adaptation mechanism comprises a sliding sleeve 3201, a sleeve fixing bolt 3202, a sliding groove 3203 and a sleeve locking hole 3204; an adjustable bolt fixing sleeve 32 is rotatably installed between the upper clamping cover 31 and the lower clamping cover 33; both ends of the adjustable bolt fixing sleeve 32 are rotatably matched with the sliding sleeve 3201; the sliding groove 3203 is symmetrically arranged on a side where the upper clamping cover 31 and the lower clamping cover 33 are close to each other; the sliding sleeve 3201 is slidably installed inside the sliding groove 3203; the sleeve locking hole 3204 is arranged at the top of the sliding sleeve 3201; the sleeve fixing bolt 3202 is threadedly connected inside the sleeve locking hole 3204; the bolt head of the sleeve fixing bolt 3202 is pressed and matched with the top of the upper clamping cover 31; The sliding sleeve 3201 can be slidably adjusted with the sliding groove 3203, so that the locking screw 4 has a greater degree of freedom when installing. The sleeve fixing bolt 3202 can make the adjustable bolt fixing sleeve 32 rotate inside to change the tilt angle. The installation operation method is as follows: Fig. 9As shown, the sleeve fixing bolt 3202 can be rotated and threadedly matched with the sliding sleeve 3201 after the position of the sliding sleeve 3201 is adjusted. The threaded matching of the sleeve fixing bolt 3202 and the sliding sleeve 3201 can make the sliding sleeve 3201 have an upward force when the sleeve fixing bolt 3202 is twisted. The bolt head of the twisted sleeve fixing bolt 3202 can have a downward force. Then the sliding sleeve 3201 and the sleeve fixing bolt 3202 can clamp and fix the upper clamping cover 31 to each other, and then the position of the sliding sleeve 3201 is fixed by the sleeve fixing bolt 3202.

[0023] The torsion angle locking assembly is arranged inside the torsion locking member 3 and is used to lock the torsion locking member 3 after the angle is adjusted; the torsion angle locking assembly comprises a position locking bolt 301 and a locking nut 302, the position locking bolt 301 is rotatably installed inside the torsion locking member 3, the locking nut 302 is fixedly embedded in the bottom of the sliding fixing member 2, and the bottom of the position locking bolt 301 passes through the torsion locking member 3 and the sliding fixing member 2 from top to bottom in sequence and extends to the inside of the locking nut 302 and is threadedly connected to the locking nut 302; The position locking bolt 301 can be twisted by the hexagon socket bolt, and the twisted position locking bolt 301 can cooperate with the locking nut 302 to move downward to squeeze the twist locking piece 3 and the sliding fixing piece 2, forcing the clamping groove 202 inside the sliding fixing piece 2 to deform and then clamp the fixing rod 1 to fix the position of the sliding fixing piece 2.

[0024] An adjusting groove 201 is provided on the top of the sliding fixing member 2 at a side away from the twist locking member 3, a sliding bolt fixing sleeve 21 is slidably installed on the left side of the sliding fixing member 2, a fixing hole 2101 is provided on the top of the sliding bolt fixing sleeve 21 at a side away from the twist locking member 3, and the fixing hole 2101 is used for fixing and installing the sliding fixing member 2 with a bolt; The adjusting groove 201 can facilitate the locking screw 4 to penetrate the sliding fixing piece 2 from top to bottom and cooperate with the sliding bolt fixing sleeve 21 to perform a fixing operation. The locking screw 4 is inserted into the broken bone 5. The fixing hole 2101 can facilitate the bolt installation and fix the sliding bolt fixing sleeve 21 inside the sliding fixing piece 2. At the same time, when a conventional installation and fixation operation is not required, removing the bolt on the fixing hole 2101 can facilitate the removal of the sliding bolt fixing sleeve 21, thereby facilitating the orthopedic surgery plan for a special operation plan of the adjustable bolt fixing sleeve 32.

[0025] Bolt movable grooves 3102 are provided on both sides of the top of the upper clamping cover 31 and above the sliding groove 3203. The bolt movable grooves 3102 are used in sliding cooperation with the shaft sleeve fixing bolts 3202. Angle twisting openings 3103 are provided inside the upper clamping cover 31 and at the bottom of the lower clamping cover 33. The angle twisting openings 3103 are used in cooperation with the adjustable bolt fixing sleeve 32. The bolt movable groove 3102 can facilitate the sleeve fixing bolt 3202 to slide on the upper clamping cover 31, and the angle twisting opening 3103 can facilitate the adjustable bolt fixing sleeve 32 to be movable and adjusted.

[0026] The top of the upper half clamping cover 31 is provided with three groups of annular equidistantly distributed positioning holes 3101, and the top of the lower half clamping cover 33 is fixedly provided with three groups of annular equidistantly distributed connecting bolts 3301, and the connecting bolts 3301 are threadedly connected with the positioning holes 3101; The positioning hole 3101 can cooperate with the connecting bolt 3301 to fix the upper half cover 31 and the lower half cover 33 in one piece, which is convenient for combining and installing the sliding sleeve 3201 and the adjustable bolt fixing sleeve 32 inside the lower half cover 33 to ensure stable installation.

[0027] Both sides of the interior of the sliding fixing member 2 are provided with clamping grooves 202 for sliding fit of the fixing rod 1; The clamping groove 202 can be provided to enable the sliding fixing member 2 to be squeezed and locked by the position locking bolt 301 after sliding, so that the clamping groove 202 deforms and clamps the surface of the fixing rod 1 to achieve position fixing.

[0028] The fixing rod 1 and the sliding fixing part 2 are both made of stainless steel and coated with tricalcium phosphate bone cement. The torsion locking part 3, the upper clamping cover 31 and the adjustable bolt fixing sleeve 32 are all made of stainless steel and coated with hydroxyapatite. The surface of stainless steel is relatively smooth, which is not conducive to the attachment of bone tissue. After coating with hydroxyapatite or tricalcium phosphate bone cement, the roughness of the implant surface increases, providing more attachment points for bone tissue, which is conducive to the growth of bone tissue, enhancing the mechanical fit between the implant and the bone tissue, and further improving the fixation effect. At the same time, although stainless steel has good strength and corrosion resistance, its biocompatibility is relatively poor, which may cause an immune response or allergic reaction in the human body. Hydroxyapatite and tricalcium phosphate bone cement have excellent biocompatibility, which can reduce the body's rejection of the implant, making the patient more comfortable during the postoperative recovery process and reducing the occurrence of complications.

[0029] Working principle: Overall installation and preliminary positioning: Place the fixing rod 1 at a suitable fracture site, and slide multiple sets of sliding fixing members 2 on the fixing rod 1 through the clamping grooves 202. Preliminarily adjust the position of the sliding fixing member 2 on the fixing rod 1 according to the specific situation of the fracture site, and then twist the position locking bolt 301. The position locking bolt 301 cooperates with the locking nut 302 to move downward to squeeze the twist locking member 3 and the sliding fixing member 2, so that the clamping groove 202 inside the sliding fixing member 2 is deformed, and the fixing rod 1 is clamped to fix the position of the sliding fixing member 2; Fine-tune the position of the upper clamping cover 31: When it is necessary to adjust the distance between the upper clamping cover 31 and the twist locking piece 3 to adapt to the surgical installation spacing, the sliding rod 331 cooperates with the adjustment hole 334 to slide inside the twist locking piece 3 to change the position of the upper clamping cover 31. After determining the spacing, use an Allen wrench to twist the sliding rod locking bolt 332. The sliding rod locking bolt 332 cooperates with the sliding rod locking hole 333 to move downward and press the sliding rod 331 to fix the sliding rod 331, thereby achieving fine-tune and lock the position of the upper clamping cover 31. Adjusting the inclination angle of the surgical screw: When installing the surgical screw, if the inclination angle needs to be adjusted, the sliding sleeve 3201 cooperates with the sliding groove 3203 to slide and adjust, providing greater freedom for the installation of the locking screw 4. At the same time, the sleeve fixing bolt 3202 can make the adjustable bolt fixing sleeve 32 rotate inside to change its inclination angle. After adjusting the position of the sliding sleeve 3201, the sleeve fixing bolt 3202 is rotated to make it threadedly cooperate with the sliding sleeve 3201. In the process of twisting the sleeve fixing bolt 3202, the sliding sleeve 3201 is subjected to an upward force, and the bolt head of the sleeve fixing bolt 3202 generates a downward force. The two interact with each other to clamp the upper half clamping cover 31, thereby fixing the position of the sliding sleeve 3201, and realizing the adjustment and locking of the inclination angle of the surgical screw. Eliminating the installation deviation of the surgical screw: The upper clamping cover 31 can eliminate the installation deviation of the surgical screw through the adjustment of the above-mentioned fine-tuning locking mechanism and the screw tilting adaptation mechanism, so that the surgical screw can be installed more accurately at the fracture site, thereby improving the fixation effect; Adaptation to special surgical plans: When conventional installation and fixation surgery is not required, the bolts on the fixing holes 2101 of the sliding bolt fixing sleeve 21 can be removed to remove it from the sliding fixing member 2, thereby facilitating the operation of the adjustable bolt fixing sleeve 32 for special orthopedic surgical plans, so that the device can adapt to more surgical plans and match some differences caused by bone differences; Biocompatibility and fixation effect are enhanced: the tricalcium phosphate bone cement coated on the surface of the fixing rod 1 and the sliding fixing part 2, and the hydroxyapatite coated on the surface of the torsion locking part 3, the upper clamping cover 31 and the adjustable bolt fixing sleeve 32 increase the roughness of the implant surface, which is conducive to the growth of bone tissue and enhances the mechanical fit between the implant and the bone tissue; at the same time, since hydroxyapatite and tricalcium phosphate bone cement have excellent biocompatibility, the body's rejection reaction to the implant is reduced, the occurrence of complications is reduced, and the healing of the fracture site is further promoted.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A combined fracture internal fixation device, comprising a fixing rod (1) and a plurality of sets of sliding fixing members (2) slidably mounted on the fixing rod (1), characterized in that: A twist locking member (3) is rotatably mounted on the top of each of the plurality of groups of sliding fixing members (2); an upper clamping cover (31) is slidably mounted on one side of the twist locking member (3); the twist locking member (3) is used to twist the use direction of the upper clamping cover (31); and the upper clamping cover (31) is used to cooperate in eliminating the installation deviation of the surgical screw; and further comprising: A fine-tuning locking mechanism is disposed in the upper clamping cover (31) and is used to fine-tune the position between the upper clamping cover (31) and the twist locking member (3) and then lock and fix them; A screw tilting adaptation mechanism is arranged inside the upper clamping cover (31) and is used to adjust the tilting angle of the adapted surgical screw; The torsion angle locking assembly is arranged inside the torsion locking piece (3) and is used to lock the torsion locking piece (3) after the angle is adjusted.

2. A combined fracture internal fixation device according to claim 1, characterized in that: The fine-tuning locking mechanism comprises a sliding rod (331), a sliding rod locking bolt (332), a sliding rod locking hole (333) and an adjusting hole (334); a lower half clamping cover (33) is provided at the bottom of the upper half clamping cover (31); the sliding rod (331) is symmetrically fixedly mounted on a side of the lower half clamping cover (33) close to the torsion locking member (3); the sliding rod locking hole (333) is arranged inside the torsion locking member (3) and is located above the sliding rod (331); the sliding rod locking bolt (332) is threadedly connected inside the sliding rod locking hole (333); and the adjusting hole (334) is arranged inside the torsion locking member (3) and is slidably matched with the sliding rod (331).

3. A combined fracture internal fixation device according to claim 2, characterized in that: The screw tilting adaptation mechanism comprises a sliding sleeve (3201), a sleeve fixing bolt (3202), a sliding groove (3203) and a sleeve locking hole (3204); an adjustable bolt fixing sleeve (32) is rotatably mounted between the upper clamping cover (31) and the lower clamping cover (33); two ends of the adjustable bolt fixing sleeve (32) are rotatably matched with the sliding sleeve (3201); the sliding groove (3203) is symmetrically arranged on a side where the upper clamping cover (31) and the lower clamping cover (33) are close to each other; the sliding sleeve (3201) is slidably mounted inside the sliding groove (3203); the sleeve locking hole (3204) is arranged at the top of the sliding sleeve (3201); the sleeve fixing bolt (3202) is threadedly connected inside the sleeve locking hole (3204); and the bolt head of the sleeve fixing bolt (3202) is pressed and matched with the top of the upper clamping cover (31).

4. The combined fracture internal fixation device according to claim 1, characterized in that: The torsion angle locking assembly comprises a position locking bolt (301) and a locking nut (302); the position locking bolt (301) is rotatably mounted inside the torsion locking member (3); the locking nut (302) is fixedly embedded in the bottom of the sliding fixing member (2); the bottom of the position locking bolt (301) passes through the torsion locking member (3) and the sliding fixing member (2) in sequence from top to bottom and extends to the inside of the locking nut (302) to be threadedly connected with the locking nut (302).

5. The combined fracture internal fixation device according to claim 1, characterized in that: An adjustment groove (201) is provided on a side of the top of the sliding fixing member (2) away from the twist locking member (3), a sliding bolt fixing sleeve (21) is slidably mounted on the left side of the sliding fixing member (2), a fixing hole (2101) is provided on a side of the top of the sliding bolt fixing sleeve (21) away from the twist locking member (3), and the fixing hole (2101) is used in conjunction with a bolt to fix the sliding fixing member (2) together.

6. The combined fracture internal fixation device according to claim 3, characterized in that: Bolt movable grooves (3102) are provided on both sides of the top of the upper clamping cover (31) and above the sliding groove (3203). The bolt movable grooves (3102) are used in sliding cooperation with the shaft sleeve fixing bolts (3202). Angle twisting openings (3103) are provided inside the upper clamping cover (31) and at the bottom of the lower clamping cover (33). The angle twisting openings (3103) are used in cooperation with the adjustable bolt fixing sleeve (32).

7. The combined fracture internal fixation device according to claim 2, characterized in that: The top of the upper clamping cover (31) is provided with three groups of annular equidistantly distributed positioning holes (3101), and the top of the lower clamping cover (33) is fixedly provided with three groups of annular equidistantly distributed connecting bolts (3301), and the connecting bolts (3301) are threadedly connected to the positioning holes (3101).

8. The combined fracture internal fixation device according to claim 1, characterized in that: Clamping grooves (202) that are slidably matched with the fixing rod (1) are provided on both sides of the interior of the sliding fixing member (2).

9. The combined fracture internal fixation device according to claim 3, characterized in that: The fixing rod (1) and the sliding fixing member (2) are both made of stainless steel, and the twist locking member (3), the upper clamping cover (31) and the adjustable bolt fixing sleeve (32) are all made of stainless steel.

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