A steel plate fixing auxiliary device for bone surgery

Abstract

The application discloses a steel plate fixing auxiliary device for bone surgery and relates to the field of medical instruments, which comprises a fixing seat and an adjusting mechanism movably arranged at the bottom end of the fixing seat and used for adjusting the clamping distance, the bottom end of the fixing seat is symmetrically provided with clamping mechanisms used for clamping bones and slidably arranged, one side of each of the clamping mechanisms is fixedly provided with an opening and closing mechanism, one side of the opening and closing mechanism is symmetrically movably provided with a fixing mechanism used for fixing a steel plate, and the bottom end of the adjusting mechanism is fixedly provided with a centering sleeve rod used for centering the steel plate; the centering sleeve rod penetrates the center of the steel plate, the center of the steel plate is aligned with the center of the bone, the reverse clamping force is provided by the spring three-drive clamping plate, the steel plate is stably clamped in the middle in combination with the silica gel pad, the steel plate is opened and closed in cooperation with the stopper, the steel plate slides downward to the bone surface and is attached, the problems that the steel plate is prone to deviating from the center and is not accurately attached in traditional surgery are solved, the number of times of repeated adjustment and X-ray perspective in surgery is reduced, and the radiation risk is reduced.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to an auxiliary device for plate fixation in bone surgery. Background Technology

[0002] Bone surgery is a surgical intervention used to reduce fractured bone ends, correct skeletal deformities, or treat bone diseases. It uses materials such as plates and screws to reconstruct the anatomical structure and physiological function of bones, thereby promoting bone health and the recovery of motor function.

[0003] In traditional bone surgery, plates are mainly made up of temporary alternative tools (such as the surgeon holding the plate by hand or with forceps) and temporary fixation devices (such as Kirschner wires). There is a lack of dedicated plate holding and positioning equipment. During the operation, the plate position is often unstable and cannot be stably controlled, which often leads to the plate deviating from the center of the bone and being improperly attached. Repeated adjustments and increased intraoperative X-ray fluoroscopy are required to confirm the position. This not only prolongs the operation time, but also increases the difficulty of operation due to the reliance on manual experience for fixation, thus affecting the efficiency of the operation. Summary of the Invention

[0004] To address the problem of unstable plate position control during surgery, this application provides a plate fixation auxiliary device for bone surgery, employing the following technical solution:

[0005] A bone surgery plate fixation auxiliary device includes a fixation base and an adjustment mechanism for adjusting the clamping distance movably disposed at the bottom end of the fixation base. A clamping mechanism for clamping bone is symmetrically slidably disposed at the bottom end of the fixation base. An opening and closing mechanism is fixedly disposed on one side of each clamping mechanism. A fixing mechanism for fixing a steel plate is symmetrically slidably disposed on one side of each opening and closing mechanism. A centering sleeve rod for centering the steel plate is fixedly disposed at the center of the bottom end of the adjustment mechanism. The clamping mechanism includes a housing and clamping blocks symmetrically slidably disposed at the lower end of the housing. A sector gear meshes with the upper end of each clamping block. A connecting rod is rotatably disposed at the end of the sector gear away from the clamping block. A connecting rod is rotatably disposed at the end of the connecting rod away from the sector gear. The first rod has a fixed block rotatably mounted at one end away from the second rod. The top of the sector gear is fixed with a transmission rod that passes through the upper end of the outer shell, and the bottom end of the transmission rod is fixed to the fixed block. The opening and closing mechanism includes a movable plate fixed to the fixed block and a stop block symmetrically slidably mounted on one side of the movable plate. A fixed plate is mounted on the side of the stop block away from the movable plate. The fixing mechanism includes a fixing frame and a clamping plate slidably mounted inside the fixing frame. The two clamping plates form a clamp for holding a steel plate. A sliding block is fixed at the middle of the top of the fixing frame. A guide block is slidably mounted on the outer side of the upper end of the sliding block. The opposite sides of the two guide blocks are respectively fixed to the middle of the opposite sides of the two fixing plates.

[0006] By adopting the above technical solution, the fixation seat and adjustment mechanism are used to adjust the clamping distance. The clamping mechanism clamps the bone through components such as sector gears and clamping blocks. The opening and closing mechanism controls the movement of the steel plate. The centering sleeve rod centers the steel plate. The fixing mechanism fixes the steel plate by forming a clamp with clamping plates, thus realizing the auxiliary function of steel plate fixation during bone surgery.

[0007] Preferably, support columns are slidably arranged around the bottom of the fixed base, and the four support columns are grouped in pairs, with the bottom of each group of support columns fixed to the top of the two outer shells respectively.

[0008] By adopting the above technical solution, the support column is used to support the clamping mechanism and assist the clamping mechanism in moving stably.

[0009] Preferably, one end of the fixing block slides through a rectangular hole in the middle of the side of the outer shell facing the opening and closing mechanism, and the other end of the fixing block slides on the inner wall of the outer shell.

[0010] By adopting the above technical solution, one end of the fixing block passes through the rectangular hole in the outer shell and is connected to the opening and closing mechanism, while the other end slides on the inner wall of the outer shell, thus connecting the clamping mechanism and the opening and closing mechanism and assisting the two to move in coordination.

[0011] Preferably, a rotating shaft three is rotatably connected to one end of the sector gear near the second connecting rod. The middle of the rotating shaft three is fixedly connected to the end of the second connecting rod near the sector gear. Both ends of the rotating shaft three are rotatably connected to the inner wall of the outer casing. The rotating shaft two is movably connected to one end of the second connecting rod near the first connecting rod. Both ends of the rotating shaft two are fixedly connected to the end of the first connecting rod near the second connecting rod. The rotating shaft one is movably connected to both ends of the fixing block. The end of the first connecting rod near the fixing block is fixedly sleeved on the middle of the rotating shaft one.

[0012] By adopting the above technical solution, rotating shaft three, rotating shaft two, and rotating shaft one serve as the connection hubs between the sector gear and connecting rod two, connecting rod two and connecting rod one, and connecting rod one and fixed block, respectively, realizing the rotational connection and transmission between the components and ensuring the stable operation of the clamping mechanism.

[0013] Preferably, the teeth at the top of the fixing block mesh with the teeth on the surface of the sector gear, and anti-slip pads are fixed on opposite sides of both clamping blocks.

[0014] By adopting the above technical solution, the top teeth of the fixed block mesh with the teeth of the sector gear to achieve transmission and drive the clamping block to move. The anti-slip pads on the opposite side of the clamping block can increase friction when clamping the bone.

[0015] Preferably, a limiting slide rod is slidably provided on one side of the movable plate, the upper end of the stop block near the movable plate is fixed to the end of the limiting slide rod away from the outer shell, the side of the fixed plate near the movable plate is fixed to the middle of the outer shell, and a T-shaped block that movably penetrates the middle of the stop block is fixed in the middle of the side of the fixed plate near the movable plate, and the stop block slides on one side of the fixed plate.

[0016] By adopting the above technical solution, the limiting slide rod connects the movable plate and the stop block, and works with the T-shaped block on the fixed plate to guide and limit the sliding of the stop block, ensuring the stable operation of the opening and closing mechanism.

[0017] Preferably, one end of one of the fixing frames is slidably sleeved on the opposite end of the other fixing frame, the opposite sides of the two guide blocks are respectively fixed to the middle of the opposite sides of the two fixing plates, the clamping plate is symmetrically fixed with spring three on the side facing the sliding block, the two ends of the spring three are respectively fixed to the inner wall of the fixing frame and the side of the clamping plate facing the sliding block, and silicone pads are fixed on the opposite sides of the lower ends of the two clamping plates.

[0018] By adopting the above technical solution, the fixed frames slide and fit together to achieve width adjustment, the guide block connects to the fixed plate to assist in positioning, the springs enable the clamping plate to elastically clamp the steel plate, and the silicone pad increases friction during clamping.

[0019] Preferably, the adjusting mechanism includes an adjusting block and a bidirectional lead screw rotatably disposed inside the adjusting block. One end of the bidirectional lead screw passes through the inner wall of one side of the adjusting block, and the other end of the bidirectional lead screw is rotatably disposed on the inner wall of the adjusting block opposite to the second circular hole. A bidirectional threaded slider is symmetrically threaded on the end of the bidirectional lead screw located on the inner wall of the adjusting block. A knob is fixedly disposed on the end of the bidirectional lead screw located on the outer side of the adjusting block. A centering plate is fixedly disposed at the middle of the bottom end of the adjusting block. The top end of the transmission rod is fixed to the middle of the bottom end of the bidirectional threaded slider.

[0020] By adopting the above technical solution, the adjustment mechanism rotates the two-way lead screw through the knob, causing the two-way threaded slider to move the transmission rod, thereby adjusting the spacing of the clamping mechanism. The centering plate can assist in centering the steel plate, achieving precise adjustment and positioning.

[0021] Preferably, a centering sleeve rod is fixedly provided at the bottom centering plate, a spring groove is provided at the lower end of the centering sleeve rod, a centering rod is inserted into the spring groove, a spring is fixedly provided at the top end of the centering rod, and the two ends of the spring are fixed to the top end of the centering rod and the inner top surface of the spring groove.

[0022] By adopting the above technical solution, the centering sleeve and the centering rod can extend and retract under the action of the spring, which can adaptively adjust and accurately center the steel plate when it is fixed, ensuring the accurate installation position of the steel plate.

[0023] Preferably, a rotating sleeve is fixedly provided at the top center of the fixed base, a threaded sleeve rod is rotatably provided inside the rotating sleeve, a knob is fixedly provided at the top of the threaded sleeve rod, a threaded rod is provided through the threaded sleeve rod, and the bottom end of the threaded rod is fixed to the top center of the adjusting block.

[0024] By adopting the above technical solution, rotating the knob will cause the threaded sleeve to rotate inside the rotating sleeve, thereby causing the threaded sleeve to move the adjusting block up and down.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. Pre-installation is achieved by inserting a centering rod through the central hole of the steel plate. After the bottom end of the centering rod contacts the bone surface, it moves upward under the reaction force, automatically calibrating the initial position of the steel plate and achieving precise alignment between the center of the steel plate and the center of the bone. A spring-driven three-stage clamping plate provides a reverse clamping force, which, combined with a silicone pad to adapt to the curvature of the steel plate, ensures stable and centered clamping of the steel plate between the two clamping plates. A movable plate drives a stop block to slide along the guide groove, controlling the obstruction during pre-installation and the release during descent, ensuring that the steel plate accurately slides down to the bone surface and adheres. This solves the problems of steel plates easily deviating from the center and inaccurate adhesion in traditional surgery, reduces repeated adjustments and X-ray fluoroscopy during surgery, and lowers radiation risks.

[0027] 2. By rotating knob one, the threaded rod and adjustment mechanism are driven to move longitudinally, which in turn drives the transmission rod, connecting rod one, connecting rod two, and sector gear to stably clamp the clamping blocks on both sides of the bone, solving the problems of unstable clamping and difficult operation in traditional clamping and improving surgical efficiency. By rotating knob two, the bidirectional lead screw is driven to rotate, which drives the two bidirectional threaded sliders to move relative to or in opposite directions, and then drives the transmission rod to drive the clamping blocks to move horizontally, realizing precise adjustment of the clamping mechanism spacing to adapt to the clamping needs of bones of different lengths. Attached Figure Description

[0028] Figure 1 This is a frontal axonometric view of the present application;

[0029] Figure 2 This is a bottom-view axial view of the present application;

[0030] Figure 3 This is a schematic diagram of the clamping mechanism structure in this application;

[0031] Figure 4 This is a front sectional view of the clamping mechanism of this application;

[0032] Figure 5 This is a cross-sectional view of the left side of the clamping mechanism in this application;

[0033] Figure 6 This is a schematic diagram of the opening and closing mechanism structure of this application;

[0034] Figure 7 This is a partial sectional view of the opening and closing mechanism of this application;

[0035] Figure 8 This is a sectional view of the fixing mechanism portion of this application;

[0036] Figure 9 This is a schematic diagram of the regulating mechanism structure of this application;

[0037] Figure 10 This is a sectional view of the centering sleeve in this application;

[0038] Figure 11 This is a sectional view of the threaded sleeve rod of this application;

[0039] Figure 12 This is a sectional view of the mounting base of this application;

[0040] Figure 13 This is a schematic diagram of the clamping mechanism of this application from the isometric view.

[0041] Figure 14 This is a schematic diagram of the internal structure of the clamping mechanism in this application;

[0042] Figure 15 This is a schematic diagram of the transmission gear plate structure of this application.

[0043] Reference numerals in the attached drawings: 1. Fixed base; 2. Clamping mechanism; 3. Opening and closing mechanism; 4. Fixing mechanism; 5. Adjusting mechanism; 6. Centering sleeve; 7. T-slot one; 8. Support column; 9. Circular hole one;

[0044] 10. Centering rod; 11. Spring 1; 12. Threaded rod; 13. Threaded sleeve rod; 14. Rotating sleeve; 15. Knob 1; 16. Spring groove; 17. Threaded groove;

[0045] 201. Outer shell; 202. Clamping block; 203. Transmission rod; 204. Fixing block; 205. Sector gear; 206. Connecting rod one; 207. Connecting rod two; 208. Rotating shaft one; 209. Rotating shaft two; 210. Rotating shaft three;

[0046] 211. Anti-slip mat; 212. Rectangular slide groove; 213. Irregularly shaped slide groove; 214. Transmission gear plate; 215. Groove; 216. Socket head cap screw; 217. Spring II; 218. Threaded hole I; 219. Irregularly shaped sliding plate;

[0047] 301. Movable plate; 302. Stop block; 303. Fixed plate; 304. Limiting slide bar; 305. Guide groove; 306. T-block; 307. T-slot two;

[0048] 401. Fixing frame; 402. Guide block; 403. Sliding block; 404. Clamping plate; 405. Silicone pad; 406. Spring 3; 407. Sliding groove; 408. Telescopic groove;

[0049] 501. Adjusting block; 502. Two-way lead screw; 503. Two-way threaded slider; 504. Two knobs; 505. Centering plate; 506. Two threaded holes; 507. Two circular holes. Detailed Implementation

[0050] The following is in conjunction with the appendix Figure 1 - Figure 15 This application will be described in further detail.

[0051] This application discloses an auxiliary device for fixing steel plates in bone surgery.

[0052] Example 1

[0053] Reference Figure 1 , 2 , Figure 10 - Figure 12 A bone surgery plate fixation auxiliary device includes a fixation base 1 and an adjustment mechanism 5 movably disposed at the bottom end of the fixation base 1 to adjust the clamping distance. The shape of the fixation base 1 is as follows (e.g., Figure 12 As shown), the bottom end of the fixed base 1 is symmetrically provided with a transversely extending T-shaped groove 7. The support column 8 is symmetrically slidably arranged inside the T-shaped groove 7. The top of the support column 8 is provided with a T-shaped block. The shape of the T-shaped block is adapted to the T-shaped cross section of the T-shaped groove 7. The support column 8 slides laterally along the T-shaped groove 7 through the T-shaped block at the top to adjust the transverse spacing of the support column 8. The middle of the fixed base 1 is provided with a circular hole 9. The four support columns 8 are grouped in pairs. The bottom end of each group of support columns 8 is fixed with a clamping mechanism 2 for clamping the bone. The opposite side of the two clamping mechanisms 2 is fixed with an opening and closing mechanism 3. The fixing mechanism 4 for fixing the steel plate is movably arranged between the two opening and closing mechanisms 3. The bottom end of the adjusting mechanism 5 is fixed with a centering sleeve 6. The shape of the centering sleeve 6 is adapted to the irregular hole (or the non-circular fixing hole of the steel plate) opened in the center of the steel plate. It is used to center the steel plate and facilitate the installation of centering sleeves 6 of different sizes to adapt to the holes of different sizes and shapes of steel plates.

[0054] This device is suitable for long bone fractures (such as femur, tibia, humerus, etc.) where the diameter difference between the two ends of the fracture site is small. Before use, an irregularly shaped hole (matching the shape of the centering sleeve 6) is made in the center of the steel plate. The threaded sleeve 13 and the rotating sleeve 14 are installed at the top center of the fixation base 1. The threaded rod 12 is installed inside the threaded sleeve 13 and passes through the middle of the fixation base 1. The bottom end of the threaded rod 12 is adjusted by the mechanism 5. Support columns 8 are fixed around the bottom of the fixation base 1. Clamping mechanisms 2 are symmetrically installed at the bottom ends of multiple support columns 8. Opening and closing mechanisms 3 are installed on opposite sides of the two clamping mechanisms 2. Fixing mechanism 4 is movably installed between the two opening and closing mechanisms 3. The centering sleeve 6 is fixed at the bottom center of the adjustment mechanism 5. The lower end of the centering sleeve 6 passes through the middle of the fixation mechanism 4. After installation, the handle is moved above the fracture site, and the initial distance between the two clamping mechanisms 2 is adjusted by the adjustment mechanism 5 to match the bone length.

[0055] A rotating sleeve 14 is fixedly installed at the top center of the fixed base 1. The bottom end of the rotating sleeve 14 is fixed to the top center of the fixed base 1. A threaded sleeve rod 13 is rotatably installed inside the rotating sleeve 14. The bottom end of the threaded sleeve rod 13 is in contact with the surface of the fixed base 1. A knob 15 is fixedly installed at the top of the threaded sleeve rod 13. A threaded groove 17 is opened inside the threaded sleeve rod 13. The shape of the threaded groove 17 is adapted to the thread on the surface of the threaded rod 12. The threaded rod 12 is installed through the thread inside the threaded sleeve rod 13. The lower end of the threaded rod 12 is movably inserted through the circular hole 9. The bottom end of the threaded rod 12 is fixed to the top center of the adjusting block 501.

[0056] In use, the steel plate is passed through the centering sleeve 6 through the hole in the middle, and the steel plate is clamped by the fixing mechanism 4. The fixing mechanism 4 is moved above the silicone pad 405 to close the two silicone pads 405, and the steel plate is pre-installed. By rotating the knob 15, the threaded sleeve 13 is rotated, and the threaded rod 12 extends and retracts inside the threaded sleeve 13. This causes the adjusting mechanism 5 to drive the transmission rod 203 to move longitudinally, thereby adjusting the distance between the two clamping mechanisms 2 to match the clamping length of the bone. At the same time, the movable plate 301 moves longitudinally on the surface of the outer shell 201 to control the opening and closing of the two stops 302. The steel plate slides down the centering sleeve 6 along the fixing mechanism 4 to fit against the bone surface. At this time, the two ends of the steel plate can be fixed. Then the device is removed and the center of the steel plate is fixed. By driving the bidirectional screw 502 to rotate, the bidirectional threaded slider 503 moves relative to or in opposite directions to adjust the distance between the two ends of the clamping mechanism 2 clamping the bone.

[0057] Reference Figure 3 - Figure 5 The clamping mechanism 2 includes a housing 201 and clamping blocks 202 symmetrically slidably disposed at the lower end of the housing 201. The shape of the housing 201 is as follows (e.g., Figure 3As shown), the top two sides of the outer shell 201 are fixed to the bottom ends of two support columns 8 respectively. Each clamping mechanism 2 is supported by two support columns 8. The T-shaped block at the top of the support column 8 slides in the T-groove 7 of the fixed base 1. The top of the outer shell 201 has a round hole. The middle of the side of the outer shell 201 facing the opening and closing mechanism 3 has a rectangular hole. The bottom of the outer shell 201 has a horizontally arranged irregularly shaped groove 213. The width of the irregularly shaped groove 213 is adapted to the thickness of the lower end of the clamping block 202. The lower end of the clamping block 202 passes through the irregularly shaped groove. The slide groove 213 slides horizontally along it. The lower inner wall of the outer shell 201 is symmetrically provided with rectangular slide grooves 212. The transmission rod 203 is movably installed inside the circular hole. The bottom end of the transmission rod 203 is fixed with a fixing block 204. The shape of the fixing block 204 is adapted to the shape of the rectangular hole. The fixing block 204 slides in the rectangular hole, and one end of the fixing block 204 passes through the rectangular hole and protrudes from the side of the outer shell 201. The end of the fixing block 204 located inside the outer shell 201 is in contact with the inner wall of the outer shell 201 to achieve sliding.

[0058] Both ends of the fixing block 204 have two circular holes. A connecting rod 206 is symmetrically rotatably mounted on both ends of the fixing block 204. Both ends of the connecting rod 206 have three circular holes. A rotating shaft 208 is movably inserted through both ends of the fixing block 204. The end of the connecting rod 206 near the fixing block 204 is fixedly sleeved on the middle of the rotating shaft 208. The middle of the rotating shaft 208 passes through the three circular holes. Both ends of the rotating shaft 208 are respectively connected to the inner surface of the outer casing 201. The two sides of the wall are attached together. The end of the connecting rod 1 206 away from the fixed block 204 is rotatably connected to the connecting rod 207. The two ends of the connecting rod 207 are respectively provided with round holes 4. The rotating shaft 209 is movably inserted through the round hole 4 at the end of the connecting rod 207 near the connecting rod 1 206. The two ends of the rotating shaft 209 are respectively fixedly inserted through the round hole 3 at the end of the connecting rod 1 206 near the connecting rod 207. The two ends of the rotating shaft 209 are respectively attached to the two sides of the inner wall of the fixed base 1.

[0059] By moving the transmission rod 203 downward, the fixed block 204 moves downward within the rectangular hole, causing the ends of the two connecting rods 206 near the fixed block 204 to rotate around the first rotating shaft 208 and move downward. This causes the ends of the connecting rods 206 away from the fixed block 204 to rotate around the second rotating shaft 209, driving the second connecting rod 207 to rotate around the third rotating shaft 210 and move downward. This, in turn, drives the sector gear 205 to rotate around the third rotating shaft 210, thereby driving the two clamping blocks 202 to move in opposite directions.

[0060] A sector gear 205 is rotatably mounted at the end of connecting rod 207 away from connecting rod 1 206. A circular hole 5 is formed at the end of sector gear 205 near connecting rod 207. A rotating shaft 3 210 is fixedly mounted inside the circular hole 5. The middle part of the rotating shaft 3 210 is fixedly mounted in the circular hole 4 at the end of connecting rod 207 near sector gear 205. Both ends of the rotating shaft 3 210 are rotatably mounted on the inner wall of the outer casing 201. A clamping block 202 is provided at the end of sector gear 205 away from connecting rod 207. The shape of clamping block 202 is (e.g., ...). Figure 5 As shown), a rack is provided at the upper end of the clamping block 202. The teeth of the rack at the top of the fixing block 204 mesh with the teeth at the end of the sector gear 205 away from the connecting rod 207. The shape of the clamping block 202 (as shown) Figure 5 As shown), protrusions are provided on both sides of the upper end of the clamping block 202. The shape of the protrusions matches the shape of the rectangular slide groove 212. The thickness of the clamping block 202 and the sector gear 205, as well as the depth of the irregular slide groove 213, are consistent with the inner cavity depth of the outer shell 201. The lower end of the clamping block 202 passes through the irregular slide groove 213 and slides in the irregular slide groove 213. Anti-slip pads 211 are fixed on opposite sides of the two clamping blocks 202. The anti-slip pads 211 are made of medical-grade silicone material, which is soft and highly elastic and can conform to the bone surface without damaging the tissue. The longitudinal movement of the fixing block 204 does not affect the rotation of the sector gear 205.

[0061] Two clamping blocks 202 are placed on both sides of the bone. The upward movement of the transmission rod 203 drives the fixed block 204 to move upward, thereby driving the connecting rod 1 206 and connecting rod 207 to reset. This causes the sector gear 205 to rotate in the opposite direction, driving the two clamping blocks 202 to move in opposite directions, thereby clamping both sides of the bone.

[0062] When the upward-moving transmission rod 203 moves the fixed block 204 upward by 5mm, it drives the connecting rod 1 206 and connecting rod 207 to reset. The connecting rod 207 drives the sector gear 205 to rotate 15° in the opposite direction around the rotating shaft 3 210. The sector gear 205 has a radius of 10mm and meshes with the rack of the clamping block 202. The 15° rotation can drive the clamping block 202 to move 2.6mm in the opposite direction along the irregular sliding groove 213 (arc length formula: L=rθ, θ=15°≈0.26rad, L=10×0.26≈2.6mm), where L is the length of the arc, r is the radius of the circle, and θ is the central angle. By adjusting the moving distance of the fixed block 204 (e.g., 5mm-15mm), the clamping distance of the clamping block 202 can be adjusted within the range of 5.2mm-15.6mm to accommodate bones of different diameters.

[0063] Reference Figure 6 , Figure 7The opening and closing mechanism 3 includes a movable plate 301 fixed to the fixed block 204 and a stop block 302 symmetrically slidably disposed on one side of the movable plate 301. The two movable plates 301 are located on opposite sides of the two outer shells 201. The middle part of the movable plate 301 near the outer shell 201 is fixed to the side of the fixed block 204 near the movable plate 301. The surface of the movable plate 301 is symmetrically provided with inclined guide grooves 305. The inclination direction of the guide grooves 305 is adapted to the moving direction of the movable plate 301 to guide the movement of the limiting slide rod 304. The shape of the guide grooves 305 (e.g., Figure 6 As shown), a limiting slide bar 304 is slidably provided inside the guide groove 305. The end of the limiting slide bar 304 near the outer shell 201 is in contact with the surface of the outer shell 201 to achieve sliding on the surface of the outer shell 201. The sliding of the limiting slide bar 304 is only constrained by the guide groove 305 on the movable plate 301.

[0064] When the fixed block 204 moves downward inside the rectangular hole of the outer shell 201, it simultaneously drives the movable plate 301 to move downward, causing the limiting slide rod 304 to slide along the inner wall of the guide groove 305, which in turn drives the stop block 302 to slide along the surface of the movable plate 301 in the opposite direction. At the same time, the stop block 302 slides through the T-slot 307 to match and slide with the T-block 306 fixed on the fixed plate 303, so that the two stop blocks 302 close together to block the fixed mechanism 4 and assist the steel plate in pre-installation.

[0065] The upper end of the stop block 302 near the movable plate 301 is fixed to the end of the limiting slide bar 304 away from the outer casing 201. The shape of the stop block 302 (e.g.) Figure 6 As shown), the side of the stop block 302 near the movable plate 301 abuts against the surface of the movable plate 301. A T-slot 307 is formed in the middle of the side of the stop block 302 away from the movable plate 301. A fixing plate 303 is provided on the side of the stop block 302 away from the movable plate 301. The side of the fixing plate 303 near the movable plate 301 is fixed to the middle of the outer shell 201. A T-shaped block 306 is fixed in the middle of the side of the fixing plate 303 near the movable plate 301. The two ends of the T-shaped block 306 are respectively fixed to the two sides of the inner wall of the fixing plate 303. The cross-sectional shape of the T-shaped block 306 is as follows (e.g., Figure 7 As shown), the shape of the T-block 306 is adapted to the shape of the T-slot 307, and the stop block 302 slides on one side of the fixed plate 303 through the T-slot 307.

[0066] When the fixed block 204 moves upward, it drives the movable plate 301 to move upward, and at the same time, the limiting slide bar 304 drives the stop block 302 to move in the opposite direction along the guide groove 305 and the T-shaped block 306, so that the two stop blocks 302 are separated. At this time, the fixing mechanism 4 can reach the bone surface through the gap between the two stop blocks 302.

[0067] Reference Figure 8The fixing mechanism 4 includes a fixing frame 401 and a clamping plate 404 that slides inside the fixing frame 401. The fixing frame 401 consists of a U-shaped slider and two rectangular blocks. The shape of the fixing frame 401 is as follows (e.g., Figure 8 As shown), a sliding block 403 is fixedly provided at the top center of the fixed frame 401. The upper end of the sliding block 403 is T-shaped, and the lower end of the sliding block 403 is rectangular. A guide block 402 is sleeved on the outer side of the upper end of the sliding block 403. A sliding groove 407 is opened inside the guide block 402. The shape of the sliding groove 407 is adapted to the shape of the upper end of the sliding block 403. The T-shaped structure of the upper end of the sliding block 403 is slidably engaged in the T-shaped sliding groove 407 to prevent the sliding block 403 from falling out. The rectangular structure of the lower end of the sliding block 403 is slidably connected to the inner wall of the U-shaped slider of the fixed frame 401. The opposite sides of the two guide blocks 402 are respectively fixed to the middle of the opposite sides of the two fixed plates 303. The U-shaped slider recess of the fixed frame 401 is adapted to the shape of the guide block 402, so that the fixed frame 401 is not restricted by the guide block 402 when sliding. The clamping plate 404 is L-shaped in general. The shape of the clamping plate 404 is as shown in (…). Figure 8 As shown), the two ends of the clamping plate 404 slide on opposite sides of the two rectangular blocks of the fixing frame 401; springs 406 are symmetrically fixed on the side of the clamping plate 404 near the U-shaped slider of the fixing frame 401.

[0068] By moving the two clamping plates 404 in opposite directions, the clamping plates 404 slide inside the fixed frame 401, causing the two clamping plates 404 to separate. At this time, the spring 406 is in a compressed state, which moves the center of the steel plate through the centering sleeve 6 and between the two clamping plates 404. The clamping plates 404 are released, and the spring 406 rebounds to provide a reverse clamping force, which drives the clamping plates 404 to clamp the steel plate, so that the spring 406 keeps the steel plate at the center of the two fixed frames 401.

[0069] Spring 3 406 is a compression spring, and its elastic force is calculated using the formula F=kx (F is the elastic force of spring 3 406, k is the spring constant of spring 3 406, and x is the compression amount of spring 3 406). The spring constant k is selected according to the steel plate material (50N / mm~100N / mm for titanium alloy and 100N / mm~150N / mm for stainless steel). The compression amount x is controlled within 20%~30% of the free length of the spring. The two ends of spring 3 406 are fixed to the inner wall of the U-shaped slider of the fixing frame 401 and the side of the clamping plate 404 near the U-shaped slider, respectively. When the clamping plate 404 is pulled open by an external force, spring 3 406 is compressed and stores elastic potential energy. After the external force is released, spring 3 406 rebounds and releases potential energy, driving the clamping plate 404. The resetting mechanism provides a stable clamping force for the steel plate, preventing deformation or slippage. One of the fixing frames 401 has two rectangular blocks with a transverse expansion groove 408 on their outer sides. The width of the expansion groove 408 matches the thickness of the rectangular block of the other fixing frame 401. The two rectangular blocks of the other fixing frame 401 can be inserted laterally into the expansion groove 408, allowing for adjustment of the lateral spacing between the two fixing frames 401. Two clamping plates 404 form a clamping device for holding the steel plate. Silicone pads 405 are fixed to opposite sides of the lower ends of both clamping plates 404. Vapor-phase silicone pads are used to adapt to the curvature of the steel plate, increasing friction. The hardness is selected as 40-50 Shore A to provide appropriate friction and flexibility, preventing the steel plate from detaching from the clamping plates 404.

[0070] The sliding block 403 slides in the sliding groove 407 of the guide block 402, which drives the fixing frame 401 to move longitudinally along the guide block 402 and move the steel plate to the surface of the bone. When the two fixing plates 303 move in opposite directions, the rectangular block of one fixing frame 401 slides into the telescopic groove 408 of the other fixing frame 401, and the lateral distance between the two fixing frames 401 is adjusted to match the width of the steel plate.

[0071] Reference Figure 9The adjusting mechanism 5 includes an adjusting block 501 and a bidirectional lead screw 502 rotatably passing through the adjusting block 501. The top end of the adjusting block 501 is attached to the middle of the bottom end of the fixed base 1. A circular hole 2 (507) is opened on one side of the adjusting block 501. One end of the bidirectional lead screw 502 passes through the circular hole 2 (507), and the other end of the bidirectional lead screw 502 is rotatably set on the inner wall of the adjusting block 501 on the side opposite to the circular hole 2 (507). A bidirectional threaded slider 503 is symmetrically threaded on the end of the bidirectional lead screw 502 located on the inner wall of the adjusting block 501. A threaded hole 2 (506) is opened in the middle of the bidirectional threaded slider 503, and the bidirectional lead screw 502 passes through the threaded hole 2 (506). The bidirectional threaded slider 503 is located in the middle of the adjusting block 501. The shape of the bidirectional threaded slider 503 is adapted to the inner wall shape of the adjusting block 501. The bidirectional threaded slider 503 slides on the inner wall of the adjusting block 501. The maximum movement range of the bidirectional threaded slider 503 can reach 10mm to 15mm, which can meet the clamping requirements of most fracture sites. The top end of the transmission rod 203 is fixed to the middle of the bottom end of the bidirectional threaded slider 503. A knob 2 504 is fixed at one end of the bidirectional lead screw 502 located outside the adjusting block 501 for driving the bidirectional lead screw 502 to rotate. A centering plate 505 is fixed at the middle of the bottom end of the adjusting block 501. The width of the centering plate 505 is less than the limit distance of relative movement of the two transmission rods 203.

[0072] When it is necessary to adjust the distance between the two clamping mechanisms 2, the double-acting screw 502 is driven to rotate by rotating the knob 2 504, which drives the two double-acting threaded sliders 503 to move in opposite or opposite directions on the inner wall of the adjusting block 501, thereby driving the two transmission rods 203 to move in opposite or opposite directions, so that the two clamping mechanisms 2 and the two opening and closing mechanisms 3 move accordingly to adapt to the length of the bone and the length of the steel plate, and at the same time drive the two sets of support columns 8 to move in opposite or opposite directions along the T-slot 1 7.

[0073] A centering sleeve 6 is fixedly installed at the middle of the bottom end of the centering plate 505. The top end of the centering sleeve 6 is fixed to the middle of the bottom end of the centering plate 505. A vertically extending spring groove 16 is opened at the lower end of the centering sleeve 6. A centering rod 10 is inserted into the spring groove 16. Different specifications of centering sleeves 6 and centering rods 10 can be installed according to requirements to adapt to different steel plate holes. A spring 11 is fixedly installed at the top end of the centering rod 10. The spring 11 is a tension spring, and its elastic force is calculated by the formula F=kx (F is the elastic force of spring 11, k is the spring constant of spring 11, and x is the tension of spring 11). The spring constant k is selected according to the hardness of the bone surface. (For hard bone, use 20N / mm~50N / mm; for cartilage, use 50N / mm~80N / mm). The stretching amount x is controlled within 10%~20% of the spring's free length. Assuming the spring's free length is 50mm and the spring constant is 50N / mm, the stretching amount should be controlled at around 5mm. The bottom end of spring 11 is fixed to the top end of centering rod 10, and the top end is fixed to the inner top surface of spring groove 16. When centering rod 10 is compressed and moves upward, spring 11 is stretched and stores elastic potential energy. After the pressure is released, spring 11 retracts and releases potential energy, driving centering rod 10 to return to its initial position, ensuring centering accuracy.

[0074] When a steel plate needs to be installed, the steel plate is moved through the center of the centering rod 10 to the middle of the centering sleeve 6 by aligning the hole in the center of the steel plate with the bottom end of the centering rod 10. The steel plate is then clamped and fixed by the fixing mechanism 4. When the steel plate needs to be fixed to the bone, the bottom end of the centering rod 10 is aligned with the middle of the bone where the steel plate needs to be installed. The device is moved downward by the handle so that the bottom end of the centering rod 10 contacts the bone surface. The reaction force drives the centering rod 10 to move upward inside the centering sleeve 6. At this time, the spring 11 is in a stretched state. After the two ends of the steel plate are fixed, the device is removed. At this time, the spring 11 rebounds and drives the centering rod 10 to reset.

[0075] The implementation principle of the bone surgery plate fixation auxiliary device in this application embodiment is as follows: When using the device, an irregular hole adapted to the centering sleeve 6 is made in the center of the steel plate. The center hole of the steel plate is passed through the centering sleeve 6, and the two clamping plates 404 are pulled outward to clamp the steel plate. The moving fixation mechanism 4 drives the sliding block 403 to slide inside the guide block 402, so that the fixation mechanism 4 is above the stop block 302. The bottom end of the centering rod 10 contacts the center of the bone surface, and the centering rod 10 slides inside the centering sleeve 6 to assist the steel plate in contacting the bone surface. By rotating the knob 15, the threaded sleeve 13 is rotated, which drives the adjusting block 501 to move longitudinally below the fixation seat 1, thereby driving the transmission rod 20. 3. The longitudinal movement causes the fixing block 204 to move within the rectangular hole of the outer shell 201, thereby driving the sector gear 205 to drive the clamping block 202 to move horizontally to clamp the two sides of the bone. At the same time, it drives the movable plate 301 to move longitudinally, driving the two stop blocks 302 to open and close. When the two stop blocks 302 separate, the fixing mechanism 4 drives the steel plate to slide down to the bone surface, and then fixes the steel plate to the bone. Rotating the knob 504 drives the bidirectional lead screw 502 to adjust the distance between the two bidirectional threaded sliders 503, while driving the two transmission rods 203 and the multiple support columns 8 of the outer shell 201 to move to adapt to the clamping distance of the bone. At the same time, it drives the two fixing frames 401 to move relative to or in opposite directions to adapt to the length of the steel plate.

[0076] Example 2:

[0077] Reference Figure 13 - Figure 15 A transmission gear plate 214 is slidably provided on the top of the clamping block 202, and the shape of the clamping block 202 (e.g.) Figure 15 As shown), the top of the clamping block 202 has a groove 215, and the shape of the transmission gear plate 214 is as follows (e.g., Figure 15 As shown), the shape of the groove 215 is adapted to the shape of the inner bottom surface of the transmission gear plate 214. A hexagonal socket head cap screw 216 is threaded through the lower end of one side of the transmission gear plate 214. A threaded hole 218 is opened in the middle of the lower end of one side of the transmission gear plate 214. The threaded hole 218 passes through the threaded hole 218. A special-shaped sliding plate 219 is rotatably provided at the end of the hexagonal socket head cap screw 216 located directly below the transmission gear plate 214. A circular groove is opened in the middle of the side of the special-shaped sliding plate 219 near the hexagonal socket head cap screw 216. The diameter of the end of the hexagonal socket head cap screw 216 near the special-shaped sliding plate 219 is larger than the diameter of the threaded part in the middle of the hexagonal socket head cap screw 216.

[0078] The end of the socket head cap screw 216 near the irregularly shaped slide plate 219 is rotatably mounted inside a circular groove. The upper end of the irregularly shaped slide plate 219 has a groove that matches the inner bottom surface of the transmission gear plate 214, allowing the upper end of the irregularly shaped slide plate 219 to slide on the inner bottom surface of the transmission gear plate 214. A spring 217 is welded and fixed to the end of the irregularly shaped slide plate 219 away from the socket head cap screw 216. Figure 14The hex bolt 216 is in a compressed state, indicating that the internal hex bolt 216 has been tightened to its limit distance. The formula for calculating the elastic force of spring 217 is F=kx (F is the elastic force of spring 217, k is the spring constant of spring 217, and x is the compression of spring 217). The spring constant of spring 217 is 50N / mm~100N / mm (suitable for titanium alloy steel plates). The free length is 50mm, and the compression is controlled at 20%~30% of the free length. For example, a 50mm spring is compressed to 35mm~40mm. The two ends of spring 217 are fixed to one side of the irregular sliding plate 219 and the side of the clamping block 202 near the irregular sliding plate 219, respectively. The length of the clamping block 202 is equal to two-thirds of the transmission gear plate 214.

[0079] For cases where there is a significant difference in bone diameter at both ends of a fracture site (such as a large bone in the metaphysis and a thinner bone in the diaphysis), by rotating the internal hex bolt 216 on one side of one of the clamping blocks 202, the thread of the internal hex bolt 216 engages with the threaded hole 218 at the lower end of the transmission gear plate 214, driving the irregularly shaped sliding plate 219 to slide along the inner bottom surface of the transmission gear plate 214 (the groove 215 is adapted to the shape of the inner bottom surface of the transmission gear plate 214), thereby driving the clamping block 202 to move linearly, achieving synchronous adjustment of the position of the clamping block 202; a spring 2 is fixed between the irregularly shaped sliding plate 219 and the clamping block 202. 217 generates elastic force through compression or stretching. The elastic reaction force adjusts the contact pressure between the clamping block 202 and the transmission tooth plate 214, thereby adjusting the distance between the two clamping blocks 202 on opposite sides to ensure stable contact between the clamping block 202 and the bone surface. By independently adjusting the internal hex bolts 216 on the clamping blocks 202 at both ends of the fracture, it is easy to control the movement distance of the clamping blocks 202 on both sides of one fracture end. Combined with the elastic deformation of the medical silicone anti-slip pad 211 at the lower end of the clamping block 202 to fit the curved surface of the bone, the two sets of clamping blocks 202 are finally effectively adapted to bones of different diameters.

[0080] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steel plate fixation auxiliary device for bone surgery, characterized in that: The device includes a fixed base (1) and an adjustment mechanism (5) that is movably set at the bottom of the fixed base (1) to adjust the clamping distance. The bottom of the fixed base (1) is symmetrically and slidably provided with a clamping mechanism (2) for clamping the bone. An opening and closing mechanism (3) is fixedly provided on one side of the clamping mechanism (2). A fixing mechanism (4) for fixing the steel plate is symmetrically and movably set on one side of the opening and closing mechanism (3). A centering sleeve (6) for centering the steel plate is fixedly provided at the middle of the bottom of the adjustment mechanism (5). The clamping mechanism (2) includes a housing (201) and a clamping block (202) symmetrically slidably arranged at the lower end of the housing (201). The upper end of the clamping block (202) is engaged with a sector gear (205). A connecting rod two (207) is rotatably arranged at the end of the sector gear (205) away from the clamping block (202). A connecting rod one (206) is rotatably arranged at the end of the connecting rod two (207) away from the sector gear (205). A fixing block (204) is rotatably arranged at the ends of the two connecting rods one (206) away from the connecting rod two (207). A transmission rod (203) penetrating the upper end of the housing (201) is fixed at the top of the sector gear (205). The bottom end of the transmission rod (203) is fixed to the fixing block (204). The opening and closing mechanism (3) includes a movable plate (301) fixed to the fixed block (204) and a stop block (302) symmetrically slidably arranged on one side of the movable plate (301). A fixed plate (303) is provided on the side of the stop block (302) away from the movable plate (301). The fixing mechanism (4) includes a fixing frame (401) and a clamping plate (404) that is slidably disposed inside the fixing frame (401). The two clamping plates (404) form a clamp for holding the steel plate. A sliding block (403) is fixedly disposed at the middle of the top of the fixing frame (401). A guide block (402) is slidably sleeved on the outer side of the upper end of the sliding block (403). The opposite sides of the two guide blocks (402) are respectively fixed to the middle of the opposite sides of the two fixing plates (303).

2. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: Support columns (8) are slidably arranged around the bottom of the fixed base (1). The four support columns (8) are grouped in pairs, and the bottom of each group of support columns (8) is fixed to the top of the two outer shells (201).

3. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: One end of the fixing block (204) slides through a rectangular hole in the middle of the side of the outer shell (201) facing the opening and closing mechanism (3), and the other end of the fixing block (204) slides on the inner wall of the outer shell (201).

4. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: The sector gear (205) has a rotating shaft three (210) rotatably passing through one end near the connecting rod two (207). The middle part of the rotating shaft three (210) is fixedly passing through the end of the connecting rod two (207) near the sector gear (205). Both ends of the rotating shaft three (210) are rotatably set on both sides of the inner wall of the outer shell (201). The connecting rod two (207) has a rotating shaft two (209) movably passing through one end near the connecting rod one (206). Both ends of the rotating shaft two (209) are fixedly passing through the end of the connecting rod one (206) near the connecting rod two (207). Both ends of the fixing block (204) have a rotating shaft one (208) movably passing through one end. The end of the connecting rod one (206) near the fixing block (204) is fixedly sleeved on the middle part of the rotating shaft one (208).

5. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: The teeth at the top of the fixed block (204) mesh with the teeth on the surface of the sector gear (205), and anti-slip pads (211) are fixed on the opposite sides of the two clamping blocks (202).

6. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: A limiting slide rod (304) is slidably provided on one side of the movable plate (301). The upper end of the stop block (302) near the movable plate (301) is fixed to the end of the limiting slide rod (304) away from the outer shell (201). The fixed plate (303) near the movable plate (301) is fixed to the middle of the outer shell (201). A T-shaped block (306) that can move through the middle of the stop block (302) is fixed in the middle of the side of the fixed plate (303) near the movable plate (301). The stop block (302) slides on one side of the fixed plate (303).

7. The bone surgery plate fixation auxiliary device according to claim 1, characterized in that: One end of the fixing frame (401) is slidably sleeved on the opposite end of the other fixing frame (401). The opposite sides of the two guide blocks (402) are respectively fixed to the middle of the opposite side of the two fixing plates (303). The clamping plate (404) is symmetrically fixed with spring three (406) on the side facing the sliding block (403). The two ends of the spring three (406) are respectively fixed to the inner wall of the fixing frame (401) and the side of the clamping plate (404) facing the sliding block (403). The lower ends of the two clamping plates (404) are both fixed with silicone pads (405) on the opposite side.

8. The auxiliary device for plate fixation in bone surgery according to claim 1, characterized in that: The adjustment mechanism (5) includes an adjustment block (501) and a bidirectional lead screw (502) rotatably passing through the inside of the adjustment block (501). One end of the bidirectional lead screw (502) passes through the inner wall of one side of the adjustment block (501), and the other end of the bidirectional lead screw (502) is rotatably set on the inner wall of the adjustment block (501) opposite to the second circular hole (507). A bidirectional threaded slider (503) is symmetrically threaded on the end of the bidirectional lead screw (502) located on the inner wall of the adjustment block (501). A knob (504) is fixed on the end of the bidirectional lead screw (502) located on the outside of the adjustment block (501). A centering plate (505) is fixed in the middle of the bottom end of the adjustment block (501). The top end of the transmission rod (203) is fixed to the middle of the bottom end of the bidirectional threaded slider (503).

9. The auxiliary device for plate fixation in bone surgery according to claim 8, characterized in that: A centering sleeve rod (6) is fixedly provided at the middle of the bottom end of the centering plate (505). A spring groove (16) is provided at the lower end of the centering sleeve rod (6). A centering rod (10) is inserted into the spring groove (16). A spring (11) is fixedly provided at the top end of the centering rod (10). The two ends of the spring (11) are fixed to the top end of the centering rod (10) and the inner top surface of the spring groove (16).

10. The auxiliary device for plate fixation in bone surgery according to claim 1, characterized in that: A rotating sleeve (14) is fixedly provided at the top center of the fixed base (1). A threaded sleeve rod (13) is rotatably provided inside the rotating sleeve (14). A knob (15) is fixedly provided at the top of the threaded sleeve rod (13). A threaded rod (12) is provided through the threaded sleeve rod (13). The bottom end of the threaded rod (12) is fixed to the top center of the adjusting block (501).

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