A minimally invasive spinal fusion device

Abstract

The present invention discloses a minimally invasive endoscopic reduction type fusion device for the spine, belonging to the technical field of medical treatment equipment. The minimally invasive endoscopic reduction type fusion device for the spine comprises two symmetrically arranged arc pieces, the surfaces of the ends of the two arc pieces that are away from each other are fixedly connected with friction convex pieces, the arc pieces are fixedly connected with support cabins on both sides of the ends of the arc pieces that are away from the friction convex pieces, an extension cabin is slidably connected through the inner sides of the support cabins, a concave support block is arranged between the two arc pieces, and a triangular top block is slidably connected to the middle of the concave support block. The present invention realizes stable movement and height fixation in the support cabin through structures such as the support cabin and the extension cabin, realizes accurate clamping and fixation of the patient's spine, and can be flexibly adjusted and reset according to surgical requirements, greatly improving the accuracy and safety of the surgery, and has broad application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical treatment equipment, and specifically relates to a minimally invasive spinal endoscopic repositioning fusion device. Background Technology

[0002] With the development of society, people work for a long time, and their spines may suffer from scoliosis, degenerative disc disease, disc herniation, osteoporosis, spondylolisthesis and other diseases, leading to spinal deformity, pain, nerve damage and partial or complete loss of mobility. In recent years, with the rapid development of clinical medicine, biomechanics and materials science, in order to treat people's diseases, therapists use posterior lumbar interbody fusion and other methods to treat patients, and fusion devices are necessary equipment for treatment. However, new fusion devices are constantly emerging. For example, carbon fiber polyetheretherketone and absorbable material interbody fusion devices have appeared; for example, rectangular, bullet-shaped, and anatomical interbody fusion devices have appeared.

[0003] However, many lumbar intervertebral fusion devices are currently designed based on open surgery and are delivered using a single probe rod. They are not suitable for minimally invasive surgery and are prone to unstable fixation. In addition, the expanded structure is mostly a fixed exposed structure, which is prone to secondary damage during implantation into the human body. Therefore, they are not suitable for current medical treatment. SUMMARY OF THE INVENTION

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a minimally invasive spinal endoscopic repositioning fusion device.

[0005] The technical solution adopted to solve the above technical problems is: a minimally invasive spinal endoscopic reduction fusion device, including two symmetrically arranged arc pieces, the surfaces of the ends of the two arc pieces away from each other are fixedly connected with friction convex pieces, the two sides of the ends of the arc pieces away from the friction convex pieces are fixedly connected with support cabins, the inner sides of the support cabins are penetrated and slidably connected with extension cabins, a concave support block is arranged between the two arc pieces, and a triangular top block is slidably connected to the middle of the concave support block.

[0006] Furthermore, the bottom surface of the concave support block is fitted with one of the arc pieces, and inclined grooves are arranged on both sides of one end of the concave support block. A swivel is rotatably connected through the middle of the surface of the concave support block away from the inclined groove, and a first cross missing ring is rotatably connected inside the swivel. The first cross missing ring is slidably connected to the first cross rotating rod through the through end thereof, and a threaded rod is fixedly connected to the end of the first cross missing ring away from the first cross rotating rod.

[0007] Through the above technical solution, a stable connection between the concave support block and the arc piece is achieved. At the same time, the design of the inclined groove increases the flexibility of the concave support block. The swivel ring is driven to rotate by the first cross-notch ring, and the meshing and sliding connection between the first cross-notch ring and the first cross-rod realizes the precise adjustment of the first cross-rod. The setting of the threaded rod further increases the stability and firmness of the connection, making the entire fusion device safer and more reliable during use. It not only improves the reset effect of the fusion device but also greatly enhances its applicability in minimally invasive surgery.

[0008] Further, the top surface of the triangular top block is attached to another arc piece. A ring groove is provided in the middle of the triangular top block. Long strip grooves are provided on both sides of the inner wall of the ring groove close to the triangular top block. A threaded sleeve is slidably connected inside the ring groove. Limiting blocks are respectively and fixedly connected to both sides of the threaded sleeve. The limiting blocks are meshed and slid with the long strip grooves. The inner side of the threaded sleeve is threadedly connected to the threaded rod.

[0009] Through the above technical solution, a stable attachment between the triangular top block and another arc piece is achieved. At the same time, the design of the ring groove provides a sliding track for the threaded sleeve. The meshing and sliding connection between the long strip groove and the limiting block ensure the stable sliding of the threaded sleeve in the ring groove without deviation or shaking. The threaded connection between the threaded sleeve and the threaded rod realizes the precise adjustment of the threaded sleeve, making the reset effect of the entire fusion device more accurate and reliable. It not only improves the lifting precision of the fusion device but also further enhances its stability and safety in spinal minimally invasive surgery.

[0010] Further, a plurality of C-shaped clamping plates are respectively provided on both sides of the bottom end of the concave support block. The plurality of C-shaped clamping plates are symmetrically arranged in pairs. A rotating shaft is fixedly connected to the top end of the C-shaped clamping plate. The rotating shaft is rotatably connected to the concave support block. Gears are respectively fixedly connected to both ends of the rotating shaft. The gears on the symmetrically arranged two C-shaped clamping plates are meshed with each other.

[0011] Through the above technical solution, synchronous rotation between the C-shaped clamping plates in pairs is achieved. When it is necessary to adjust the included angle of the C-shaped clamping plates, only need to drive one of the C-shaped clamping plates to rotate, and the other C-shaped clamping plate symmetric to it will achieve synchronous rotation through the meshing action of the gears, realizing the detachment of the lifting and reset structure. It not only simplifies the operation process and improves the surgical efficiency but also ensures the stability and accuracy of the C-shaped clamping plates during adjustment, further enhancing the applicability of the fusion device in spinal minimally invasive surgery.

[0012] Furthermore, one of the gears is fixedly connected to a rotating plate at its center, and a push column is slidably connected to the rotating plate at one end away from the gear, and a push plate is fixedly connected to the push column at one end away from the rotating plate, and an M-shaped spring is fixedly connected to the middle of the push plate, and the M-shaped spring is fixedly connected to a concave support block at one end away from the push plate, and the push plate is located inside the concave support block and is slidably connected laterally, and a first elliptical plate is rotatably connected between the two push plates, and a second cross missing ring is fixedly connected to one side of the middle of the first elliptical plate, and the meshing end of the second cross missing ring is rotatably connected to the concave support block, the second cross missing ring is located below the rotating ring, and the meshing end of the second cross missing ring is slidably connected to a second cross rotating rod.

[0013] Through the above technical solution, the M-shaped spring sheet on the push plate plays a role of buffering and resetting. When the push plate is subjected to external force, the M-shaped spring sheet can deform to absorb the external force, and reset the push plate through its elastic restoring force after the external force disappears. The second cross missing ring can rotate within a certain range and realize relative movement with the concave support block through the meshing relationship with the second cross rotating rod.

[0014] Furthermore, the arc piece is fixedly connected to a plurality of limit plates on both sides of the surface near one end of the concave support block, the limit plates are fitted with the corners of the concave support block, and two grab support bars are fixedly connected to the middle of the arc piece surface, the grab support bars are fitted with the surface of the concave support block, and the two sides of the grab support bars are rotatably engaged with two C-shaped clamps.

[0015] Through the above technical solution, the design of the limit plate allows the position of the lifting structure on the arc piece to be fixed, avoiding displacement or shaking during use and improving the stability of the overall structure. The setting of the grab support bar facilitates the operation and control of the arc piece. The user can hold the grab support bar with the C-shaped splint to easily move or adjust the position of the lifting structure, which not only improves the convenience of operation, but also enhances the flexibility and adaptability of the fusion device.

[0016] Furthermore, two arc-shaped slide grooves are fixedly connected to the bottom of the support cabin, and side slide grooves are arranged on both sides of the support cabin.

[0017] Through the above technical solution, the design of the arc chute and the side chute provides guidance and support for the movement of the lifting structure. The arc chute can guide the lifting structure to move in an arc track inside the support cabin, so that the lifting structure can rise or fall smoothly while maintaining the relative position relationship with the concave support block. The side chute limits the horizontal movement range of the lifting structure, preventing the lifting structure from deflecting or shaking during movement, further improving the stability and reliability of the overall structure, not only making the movement of the lifting structure more precise and controllable, but also enhancing the stability and safety of the fusion device during surgery.

[0018] Furthermore, four corner positions on both sides of the extension cabin are fixedly connected with vertex bumpers respectively. The vertex bumpers are meshed and slidably connected with the side chutes. The upper and lower ends of the extension cabin are fixedly connected with long strip chutes. One side of the middle part of the extension cabin is fixedly connected with a mounting plate. The middle part of the extension cabin is fixedly connected with a fixed rotating shaft. Two friction turntables are rotatably connected to both sides of the middle part of the fixed rotating shaft. One end of the two friction turntables away from each other is fixedly connected with a round head support rod. The two round head support rods are arranged symmetrically in a staggered manner. Both ends of the round head support rod are fixedly connected with a connecting shaft. The connecting shaft is meshed and slidably connected with the arc chute.

[0019] Through the above technical solution, the design of the meshed and slidable connection between the vertex bumper and the side chute makes the movement of the extension cabin in the support cabin more stable and controllable. The design of the fixed rotating shaft and the two friction turntables enables the extension cabin to rotate or adjust the angle as needed during the movement, thus ensuring the stability and safety of the fusion device during the operation.

[0020] Furthermore, two second clamping plates are slidably connected to both sides between the two long strip chutes respectively. A sliding rod is fixedly connected between the upper and lower ends of the two second clamping plates. A first clamping plate is slidably connected through the middle part of the two sliding rods. The first clamping plate and the second clamping plate close to the spring are located on both sides of the friction turntable. Friction clamping grooves are fixedly connected to the middle parts of the second clamping plate close to the friction turntable and the first clamping plate respectively.

[0021] Through the above technical solution, the design of the two second clamping plates and the first clamping plate with the sliding rod and the friction clamping groove can achieve a stable clamping effect under the action of the friction turntable, further enhancing the stability and reliability of the fusion device after the operation.

[0022] Furthermore, a spring is arranged on the surface of the sliding rod. The spring is located between the first clamping plate and the second clamping plate far away from each other. A second elliptical plate is arranged between the springs. The second elliptical plate is slidably attached to the first clamping plate and the second clamping plate respectively. A pushing disc is fixedly connected to the middle part of the second elliptical plate. The pushing disc is rotatably connected through the surface of the extension cabin. A cylinder is fixedly connected to the outer ring of the surface of the pushing disc passing through. The cylinder is slidably attached to the inclined groove.

[0023] Through the above technical solution, the design of the spring and the second elliptical plate can be reset during the clamping process of the first clamping plate and the second clamping plate, realizing the rotation and fixation of the friction turntable, ensuring the stability and reliability of the clamping effect, not only improving the adaptability and flexibility of the fusion device after the operation, but also greatly enhancing its practicability and safety in minimally invasive surgery.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. The present invention uses structures such as a support cabin and an extension cabin. The arc-shaped chute and side chute provided inside the support cabin offer precise guidance and support for the movement of the extension cabin, ensuring the stability and reliability of the extension cabin during movement. The design of the extension cabin is more flexible. It realizes stable movement and height fixation within the support cabin through the meshing sliding connection of the top corner bump with the side chute and the rotational connection of the fixed rotating shaft and two friction turntables, thereby being able to adapt to different surgical requirements and ensuring the success rate and safety of the surgery.

[0026] 2. Through the design of the reset mechanism for each structure of the present invention, the fusion device can accurately reset the spine during the surgery, effectively avoiding the problem of inaccurate reset that may occur in traditional surgeries. This design not only improves the accuracy of the surgery but also significantly shortens the surgery time, reduces the pain and surgical risks of the patient. At the same time, the adjustability of the reset mechanism enables the fusion device to adapt to the spinal morphologies and surgical requirements of different patients, further enhancing its applicability and flexibility in minimally invasive spinal surgeries.

[0027] 3. By setting a removable lifting structure, namely a concave support block and a triangular top block, the present invention can simplify the surgical procedure, reduce the complexity of surgical operations, thereby shortening the surgery time. For the patient, this means reducing the exposure time on the operating table, lowering the anesthesia risk and infection risk. For some surgeons with relatively less experience, the surgical operation is more intuitive and simple, and the doctor can focus more on key steps such as the implantation and fixation of the fusion device, improving the success rate of the surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the first structural schematic diagram of the present invention;

[0029] Figure 2 is the second structural schematic diagram of the present invention;

[0030] Figure 3 is the first perspective schematic diagram of the lifting structure of the present invention;

[0031] Figure 4 is the second perspective schematic diagram of the lifting structure of the present invention;

[0032] Figure 5 is the structural schematic diagram of the concave support block of the present invention;

[0033] Figure 6 is the exploded schematic diagram of the triangular top block structure of the present invention;

[0034] Figure 7 is the exploded schematic diagram of the first cross-shaped rotating rod structure of the present invention;

[0035] Figure 8It is the first structural schematic diagram of the lifting mechanism fixing of the present invention;

[0036] Figure 9 It is the second structural schematic diagram of the lifting mechanism fixing of the present invention;

[0037] Figure 10 It is the structural schematic diagram of the arc piece and the extension cabin of the present invention;

[0038] Figure 11 It is the internal structural schematic diagram of the extension cabin of the present invention;

[0039] Figure 12 It is the structural schematic diagram of the extension cabin of the present invention;

[0040] Figure 13 It is the sectional structural schematic diagram of the extension cabin of the present invention;

[0041] Figure 14 It is the first structural schematic diagram of the extension structure of the present invention;

[0042] Figure 15 It is the second structural schematic diagram of the extension structure of the present invention.

[0043] Reference numerals: 1, arc piece; 101, limit plate; 102, grasping support bar; 2, friction convex piece; 3, support cabin; 301, arc-shaped sliding groove; 302, side sliding groove; 4, concave support block; 401, inclined groove; 402, rotating ring; 403, first cross-shaped missing ring; 404, second cross-shaped missing ring; 405, threaded rod; 406, first elliptical plate; 407, push plate; 408, push column; 409, rotating plate; 410, rotating shaft; 411, C-shaped clamping plate; 412, gear; 413, M-shaped elastic piece; 5, first cross-shaped rotating rod; 6, second cross-shaped rotating rod; 7, extension cabin; 701, pushing disk; 702, cylinder; 703, apex convex block; 704, mounting plate; 705, long strip sliding groove; 706, connecting shaft; 707, round head support rod; 708, sliding rod; 709, friction clamping groove; 710, second elliptical plate; 711, first clamping plate; 712, spring; 713, second clamping plate; 714, friction rotating disk; 715, fixed rotating shaft; 8, triangular top block; 801, ring groove; 802, long strip groove; 803, threaded sleeve; 804, limit block. Detailed implementation manners

[0044] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] Such as Figures 1 to 15As shown in the figure, a minimally invasive spinal arthroscopic reduction fusion device according to this embodiment includes two symmetrically arranged arc-shaped pieces 1. Friction convex pieces 2 are fixedly connected to the surfaces of the two arc-shaped pieces 1 at the ends away from each other. Support cabins 3 are fixedly connected to both sides of the arc-shaped pieces 1 away from the friction convex pieces 2. An extension cabin 7 is slidably connected through the inside of the support cabins 3. A concave support block 4 is arranged between the two arc-shaped pieces 1, and a triangular top block 8 is slidably connected to the middle of the concave support block 4.

[0046] As Figures 3 to 5 shown, the bottom surface of the concave support block 4 is attached to one of the arc-shaped pieces 1. Inclined grooves 401 are arranged on both sides of one end of the concave support block 4. A rotating ring 402 is rotatably connected through the middle of the surface of the concave support block 4 away from the inclined grooves 401. A first cross-shaped missing ring 403 is rotatably connected to the inside of the rotating ring 402. A first cross-shaped rotating rod 5 is slidably connected through the meshing of the penetrating end of the first cross-shaped missing ring 403. A threaded rod 405 is fixedly connected to the end of the first cross-shaped missing ring 403 away from the first cross-shaped rotating rod 5. The meshing and sliding connection between the first cross-shaped missing ring 403 and the first cross-shaped rotating rod 5 realizes the precise adjustment of the first cross-shaped rotating rod 5. The setting of the threaded rod 405 further increases the stability and firmness of the connection, making the entire fusion device safer and more reliable during use. It not only improves the reduction effect of the fusion device but also greatly enhances its applicability in minimally invasive surgery.

[0047] As Figure 5 shown, the top surface of the triangular top block 8 is attached to the other arc-shaped piece 1. An annular groove 801 is arranged in the middle of the triangular top block 8. Long strip grooves 802 are arranged on both sides of the inner wall of the annular groove 801 close to the triangular top block 8. A threaded sleeve 803 is slidably connected to the inside of the annular groove 801. Limit blocks 804 are respectively fixedly connected to both sides of the threaded sleeve 803. The limit blocks 804 are meshed and slid with the long strip grooves 802. The inside of the threaded sleeve 803 is threadedly connected to the threaded rod 405. The threaded connection between the threaded sleeve 803 and the threaded rod 405 realizes the precise adjustment of the threaded sleeve 803, making the reduction effect of the entire fusion device more accurate and reliable.

[0048] As Figures 7 to 9 shown, a number of C-shaped clamping plates 411 are respectively arranged on both sides of the bottom end of the concave support block 4. The number of C-shaped clamping plates 411 is arranged in pairs symmetrically. A rotating shaft 410 is fixedly connected to the top end of the C-shaped clamping plate 411. The rotating shaft 410 is rotatably connected to the concave support block 4. Gears 412 are respectively fixedly connected to both ends of the rotating shaft 410. The gears 412 on the two symmetrically arranged C-shaped clamping plates 411 are meshed with each other, realizing the synchronous rotation between the C-shaped clamping plates 411 in pairs. When it is necessary to adjust the included angle of the C-shaped clamping plates 411, only one of the C-shaped clamping plates 411 needs to be driven to rotate, and the other C-shaped clamping plate symmetric to it will realize synchronous rotation through the meshing action of the gears 412, realizing the detachment of the lifting and reduction structure.

[0049] As shown Figures 7 to 9 in the figure, a rotating plate 409 is fixedly connected to the center of one of the gears 412. One end of the rotating plate 409 away from the gear 412 is meshed and slidably connected to a push column 408. One end of the push column 408 away from the rotating plate 409 is fixedly connected to a push plate 407. A U-shaped elastic piece 413 is fixedly connected to the middle of the push plate 407. One end of the U-shaped elastic piece 413 away from the push plate 407 is fixedly connected to the concave support block 4. The push plate 407 is horizontally slidably connected inside the concave support block 4. A first elliptical plate 406 is rotatably connected between the two push plates 407. One side of the middle of the first elliptical plate 406 is fixedly connected to a second cross-shaped missing ring 404. The meshing end of the second cross-shaped missing ring 404 is rotatably connected through the concave support block 4. The second cross-shaped missing ring 404 is located below the rotating ring 402. The meshing end of the second cross-shaped missing ring 404 is slidably connected to a second cross-shaped rotating rod 6. The second cross-shaped missing ring 404 can rotate within a certain range and realize relative movement with the concave support block 4 through the meshing relationship with the second cross-shaped rotating rod 6.

[0050] As shown Figures 10 to 11 in the figure, a plurality of limiting plates 101 are fixedly connected to both sides of the surface of one end of the arc piece 1 close to the concave support block 4. The limiting plates 101 are attached to the corner positions of the concave support block 4. Two grasping support strips 102 are fixedly connected to the middle of the surface of the arc piece 1. The grasping support strips 102 are attached to the surface of the concave support block 4. Both sides of the grasping support strips 102 are rotatably meshed with two C-shaped clamping plates 411. The design of the limiting plates 101 fixes the position of the lifting structure on the arc piece 1, avoids displacement or shaking during use, and improves the stability of the overall structure.

[0051] As shown Figures 10 to 11 in the figure, two arc-shaped sliding grooves 301 are fixedly connected to the bottom end inside the support cabin 3. The design of the arc-shaped sliding grooves 301 provides guidance and support for the movement of the lifting structure. The arc-shaped sliding grooves 301 can guide the lifting structure to move along an arc trajectory inside the support cabin 3, enabling the lifting structure to rise or fall smoothly while maintaining the relative position relationship with the concave support block 4. Side sliding grooves 302 are arranged on both sides inside the support cabin 3. The side sliding grooves 302 limit the movement range of the lifting structure in the horizontal direction, prevent the lifting structure from shifting or shaking during movement, and further improve the stability and reliability of the overall structure.

[0052] As shown Figure 12As shown in the figure, four corner positions on both sides of the extension cabin 7 are fixedly connected with top corner bumps 703 respectively. The top corner bumps 703 are meshed and slidably connected with the side chutes 302. The upper and lower ends of the extension cabin 7 are fixedly connected with long chutes 705. One side of the middle part of the extension cabin 7 is fixedly connected with a mounting plate 704. The middle part of the extension cabin 7 is fixedly connected with a fixed rotating shaft 715. Two friction turntables 714 are rotatably connected to both sides of the middle part of the fixed rotating shaft 715. Fixedly connected to the mutually remote ends of the two friction turntables 714 are round head struts 707. The two round head struts 707 are arranged in a staggered and symmetrical manner. Both ends of the round head struts 707 are fixedly connected with connecting shafts 706. The connecting shafts 706 are meshed and slidably connected with the arc chutes 301. The design of the fixed rotating shaft 715 and the two friction turntables 714 enables the extension cabin 7 to rotate or adjust the angle as needed during the movement process, thus ensuring the stability and safety of the fusion device during the operation.

[0053] As Figures 13 to 15 shown, two second clamping plates 713 are slidably connected to both sides between the two long chutes 705 respectively. A slide bar 708 is fixedly connected between the upper and lower ends of the two second clamping plates 713. A first clamping plate 711 is slidably penetrated through the middle parts of the two slide bars 708. The first clamping plate 711 and the second clamping plate 713 far from the spring 712 are located on both sides of the friction turntable 714. Friction clamping grooves 709 are fixedly connected to the middle parts of the second clamping plate 713 close to the friction turntable 714 and the middle part of the first clamping plate 711 respectively. Through the design of the slide bar 708 and the friction clamping grooves 709, the two second clamping plates 713 and the first clamping plate 711 can achieve a stable clamping effect under the action of the friction turntable 714, further enhancing the stability and reliability of the fusion device after the operation.

[0054] As Figures 13 to 15 shown, a spring 712 is arranged on the surface of the slide bar 708. The spring 712 is located between the first clamping plate 711 and the second clamping plate 713 far from it. A second elliptical plate 710 is arranged between the springs 712. The second elliptical plate 710 is slidably attached to the first clamping plate 711 and the second clamping plate 713 respectively. A push plate 701 is fixedly connected to the middle part of the second elliptical plate 710. The push plate 701 is rotatably connected through the surface of the extension cabin 7. A cylinder 702 is fixedly connected to the outer ring of the penetrated surface of the push plate 701. The cylinder 702 is slidably attached to the inclined groove 401. The design of the spring 712 and the second elliptical plate 710 can be reset during the clamping process of the first clamping plate 711 and the second clamping plate 713, realizing the rotation and fixation of the friction turntable 714, ensuring the stability and reliability of the clamping effect, not only improving the adaptability and flexibility of the fusion device after the operation, but also greatly enhancing its practicability and safety in minimally invasive surgery.

[0055] The working principle of this embodiment is as follows:

[0056] During use, medical staff first implant the fusion device through a minimally invasive incision of the patient into the part of the spine that needs to be fused. The two arc-shaped pieces 1 are aligned with both sides of the patient's spine, and the friction bumps 2 are used to increase the friction between the arc-shaped pieces 1 and the patient's skin, preventing the arc-shaped pieces 1 from sliding during the operation. Then, the medical staff can operate the first cross-shaped rotating rod 5 to engage and slide with the first cross-shaped missing ring 403, driving the threaded rod 405 to rotate. Since the threaded sleeve 803 is threadedly connected to the threaded rod 405, the rotation of the threaded rod 405 will drive the threaded sleeve 803 to slide inward along the annular groove 801, thereby pushing the triangular top block 8 to move inward, causing the two arc-shaped pieces 1 to move away from each other, realizing the support and fixation of the patient's spine.

[0057] During the process of the two arc-shaped pieces 1 moving away from each other, since the arc-shaped sliding grooves 301 inside them are slidably connected to the round-headed struts 707 through the connecting shafts 706, the two round-headed struts 707 will move synchronously as the arc-shaped pieces 1 open, thereby driving the extension cabin 7 to perform stable sliding and angle adjustment inside the support cabin 3. The top corner bumps 703 of the extension cabin 7 are guided by the side sliding grooves 302, ensuring the precise guiding and stable support of the extension cabin 7 during movement.

[0058] After the two arc-shaped pieces 1 are fully opened, the medical staff can rotate and engage and slide the second cross-shaped rotating rod 6 with the second cross-shaped missing ring 404 to push the first elliptical plate 406 to rotate, thereby pushing the push plates 407 to move away from each other, and then driving the rotating plate 409 and the push columns 408 to move. Through the gears 412 on the C-shaped clamping plates 411 meshing and rotating with each other, the two C-shaped clamping plates 411 rotate symmetrically to release the clamped grasping support strip 102. At this moment, the concave-shaped support block 4 can be freely extracted, and the concave-shaped support block 4 and the triangular top block 8 are pulled out of the two arc-shaped pieces 1.

[0059] Since the cylinder 702 is in sliding fit with the inclined groove 401, the position of the cylinder 702 is fixed. When the concave support block 4 and the triangular top block 8 are withdrawn, the cylinder 702 disengages from the inclined groove 401, and the cylinder 702 drives the push plate 701 to rotate. Since the push plate 701 is fixedly connected to the second elliptical plate 710, the second elliptical plate 710 rotates accordingly. The second elliptical plate 710 changes from the short end to the long end and contacts the first clamping plate 711 and the second clamping plate 713 near the spring 712. With the assistance of the spring 712, the first clamping plate 711 and the second clamping plate 713 near the spring 712 move away from each other. Since the two second clamping plates 713 are fixedly connected by the sliding rod 708, and the two ends of the first clamping plate 711 are slidably connected through the sliding rod 708, when the second clamping plates 713 and the first clamping plate 711 on both sides of the second elliptical plate 710 move away from each other, the second clamping plates 713 at the other end move closer to the first clamping plate 711. Since a friction clamping groove 709 is fixedly connected to the middle of the side where the second clamping plate 713 away from the second elliptical plate 710 is close to the first clamping plate 711, and the friction turntable 714 is located between the first clamping plate 711 and the second clamping plate 713, the friction clamping groove 709 approaches the two friction turntables 714, and the friction clamping groove 709 is in sliding engagement with the two friction turntables 714 to fix the two friction turntables 714.

[0060] Since the two round head support rods 707 are respectively fixedly connected to the two friction turntables 714, when the two friction turntables 714 are fixed, the two round head support rods 707 are also fixed accordingly, ensuring the stable position of the extension cabin 7 during the operation. Therefore, medical staff can flexibly adjust the position and length of the extension cabin 7 according to the progress of the operation and the need for spinal fusion, ensuring that the fusion device can accurately act on the spine and achieving the best fusion effect.

[0061] After the operation, medical staff can perform reverse operations. First, the concave support block 4 is sent between the arc-shaped pieces 1 through the second cross-shaped rotating rod 6. Due to the inclined structure of the inclined grooves 401 on both sides of the concave support block 4, during the sliding engagement with the cylinder 702, the pushing disk 701 is pushed to rotate. The second elliptical plate 710 fixedly connected to the pushing disk 701 rotates accordingly. The second elliptical plate 710 changes from the long side to the short side and contacts the first clamping plate 711 and the second clamping plate 713 close to the spring 712. Under the action of the spring 712, the first clamping plate 711 and the second clamping plate 713 on both sides of the second elliptical plate 710 approach each other, while the first clamping plate 711 and the second clamping plate 713 on both sides of the friction rotating disk 714 move away from each other. The two friction clamping grooves 709 disengage from the two friction rotating disks 714, releasing the two friction rotating disks 714. The fixed two round-headed support rods 707 also rotate accordingly, causing the two arc-shaped pieces 1 to gradually approach and close. The meshing and sliding of the second cross-shaped rotating rod 6 and the second cross-shaped missing ring 404 cause the first elliptical plate 406 to rotate in the reverse direction. The M-shaped elastic piece 413 drives the push plate 407 and the C-shaped clamping plate 411 to reset, re-clamping and grasping the support bar 102, and the fusion device is removed from the patient's body through the second cross-shaped rotating rod 6.

[0062] The minimally invasive spinal arthroscopic reduction fusion device of the present invention realizes precise support and fixation of the spine in minimally invasive surgery through its unique design structure and working principle, and at the same time provides a flexible adjustment space to meet the surgical needs of different patients.

[0063] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A minimally invasive spinal endoscopic reduction fusion device, comprising two symmetrically arranged arc pieces (1), characterized in that: The surfaces of the ends of the two arc plates (1) that are away from each other are fixedly connected with friction protrusions (2); the two sides of the ends of the arc plates (1) that are away from the friction protrusions (2) are fixedly connected with support cabins (3); an extension cabin (7) is slidably connected through the inner sides of the support cabins (3); a concave support block (4) is provided between the two arc plates (1); and a triangular top block (8) is slidably connected to the middle of the concave support block (4); The bottom surface of the concave support block (4) is fitted with one of the arc pieces (1); inclined grooves (401) are arranged on both sides of one end of the concave support block (4); a rotating ring (402) is rotatably connected to the middle of the surface of the concave support block (4) away from the inclined groove (401); a first cross missing ring (403) is rotatably connected to the inner side of the rotating ring (402); a first cross missing ring (403) is rotatably connected to the through end of the first cross missing ring (403) in meshing and sliding connection with a first cross rotating rod (5); and a threaded rod (405) is fixedly connected to the end of the first cross missing ring (403) away from the first cross rotating rod (5); The top surface of the triangular top block (8) is fitted with another arc piece (1); a ring groove (801) is provided in the middle of the triangular top block (8); long grooves (802) are provided on both sides of the inner wall of the ring groove (801) close to the triangular top block (8); a threaded sleeve (803) is slidably connected to the inner side of the ring groove (801); both sides of the threaded sleeve (803) are fixedly connected to limit blocks (804); the limit blocks (804) are meshed and slidably engaged with the long groove (802); and the inner side of the threaded sleeve (803) is threadedly connected to the threaded rod (405); A plurality of C-shaped clamping plates (411) are respectively arranged on both sides of the bottom end of the concave support block (4), and the plurality of C-shaped clamping plates (411) are symmetrically arranged in pairs. A rotating shaft (410) is fixedly connected to the top end of the C-shaped clamping plates (411), and the rotating shaft (410) is rotatably connected to the concave support block (4). Gears (412) are respectively fixedly connected to both ends of the rotating shaft (410), and the gears (412) on the two symmetrically arranged C-shaped clamping plates (411) are meshed with each other. A plurality of limit plates (101) are fixedly connected to the two sides of the surface of one end of the arc piece (1) close to the concave support block (4), and the limit plates (101) fit in with the corners of the concave support block (4). Two grabbing support bars (102) are fixedly connected to the middle of the surface of the arc piece (1), and the grabbing support bars (102) fit in with the surface of the concave support block (4). The two sides of the grabbing support bar (102) are rotatably engaged with two C-shaped clamping plates (411); A rotating plate (409) is fixedly connected to the center of one of the gears (412); an end of the rotating plate (409) away from the gear (412) is meshingly and slidably connected to a push column (408); an end of the push column (408) away from the rotating plate (409) is fixedly connected to a push plate (407); an M-shaped spring sheet (413) is fixedly connected to the middle of the push plate (407); an end of the M-shaped spring sheet (413) away from the push plate (407) is fixedly connected to the concave support block (4); and the push plate (407) is positioned A first elliptical plate (406) is rotatably connected inside the concave support block (4) and is slidably connected thereto. A second cross missing ring (404) is fixedly connected to one side of the middle of the first elliptical plate (406). The meshing end of the second cross missing ring (404) is rotatably connected to the concave support block (4). The second cross missing ring (404) is located below the rotating ring (402). The meshing end of the second cross missing ring (404) is slidably connected to a second cross rotating rod (6).

2. The minimally invasive spinal fusion device according to claim 1, characterized in that: Two arc-shaped slide grooves (301) are fixedly connected to the bottom end of the support cabin (3), and side slide grooves (302) are arranged on both sides of the support cabin (3).

3. The minimally invasive spinal fusion device according to claim 1, characterized in that: Four corner positions on both sides of the extension cabin (7) are respectively fixedly connected with top corner protrusions (703), and the top corner protrusions (703) are meshed and slidably connected with the side slide grooves (302). The upper and lower ends of the extension cabin (7) are fixedly connected with long slide grooves (705), and one side of the middle of the extension cabin (7) is fixedly connected with a mounting plate (704). The middle of the extension cabin (7) is fixedly connected with a fixed shaft (715), and two friction rotating disks (714) are rotatably connected to the two sides of the middle of the fixed shaft (715). The two friction rotating disks (714) are fixedly connected with round head support rods (707) at one end away from each other. The two round head support rods (707) are staggered and symmetrically arranged. The two ends of the round head support rods (707) are fixedly connected with connecting shafts (706), and the connecting shafts (706) are meshed and slidably connected with the arc-shaped slide grooves (301).

4. The minimally invasive spinal fusion device according to claim 3, characterized in that: Two second clamping plates (713) are slidably connected on both sides between the two long sliding grooves (705), a sliding rod (708) is fixedly connected between the upper and lower ends of the two second clamping plates (713), and a first clamping plate (711) is slidably connected through the middle of the two sliding rods (708). The first clamping plate (711) and one of the second clamping plates (713) are located on both sides of the friction rotating disk (714), and a friction slot (709) is fixedly connected to the middle of the second clamping plate (713) on the side close to the friction rotating disk (714) and the middle of the first clamping plate (711).

5. The minimally invasive spinal fusion device according to claim 4, characterized in that: A spring (712) is arranged on the surface of the slide bar (708), and the spring (712) is located away from the first clamping plate (711) and the second clamping plate (713). A second elliptical plate (710) is arranged between the spring (712), and the second elliptical plate (710) is slidably fitted with the first clamping plate (711) and the second clamping plate (713) respectively. A pushing plate (701) is fixedly connected to the middle part of the second elliptical plate (710), and the pushing plate (701) is rotatably connected to the surface of the extension cabin (7). A cylinder (702) is fixedly connected to the outer ring of the pushing plate (701) through the surface, and the cylinder (702) is slidably fitted with the inclined groove (401).

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