Minimally invasive spine intervertebral fusion cage and non-rigid fixing device thereof

Abstract

The invention discloses a spine minimally invasive intervertebral fusion cage and a non-rigid fixing device thereof, and belongs to the technical field of spine surgery medical instruments.The spine minimally invasive intervertebral fusion cage comprises a fusion cage mechanism located between two adjacent spine vertebral bodies, and a connecting mechanism is arranged in the middle of the interior of the fusion cage mechanism; the top and the bottom of the interior of the fusion cage mechanism are jointly provided with a supporting mechanism. The same ends of the left support frame and the right support frame are respectively provided with two groups of fixing mechanisms, so that the stability of fixed connection between the single left support frame or the single right support frame and the spine centrum is ensured, and the left support frame and the right support frame are connected into an integral support ring body by the connecting mechanisms; the stability of connection between the supporting ring body and the spine vertebral bodies can be further improved through the four sets of fixing mechanisms, a non-rigid mechanism is further installed on one side of one end of each spine vertebral body through a connecting screw hole, and two adjacent sets of spine vertebral bodies can be stably pulled.

Description

Technical Field

[0001] The present invention belongs to the technical field of spinal surgical medical instruments, and in particular relates to a minimally invasive spinal interlaminar fusion device and a non-rigid fixation device thereof. Background Art

[0002] Lumbar degenerative disease is a common disease that causes low back pain and dysfunction. Currently, commonly used treatments include conservative treatment, minimally invasive surgery and surgical treatment. For patients with spinal degenerative diseases, if they have intervertebral disc herniation or spinal canal stenosis accompanied by spinal instability, conservative treatment is not effective at this time and surgical treatment is often required. During the operation, not only the intervertebral disc needs to be removed and the nerve roots released, but also the use of vertebral fusion technology to install the fusion device needs to be considered.

[0003] In order to reduce the surgical incision, the existing minimally invasive spinal interlaminar fusion device is designed to be smaller in size, and two sets of fusion devices are added into the spinal vertebrae to ensure the support effect of the fusion device on the spinal vertebrae. However, the two sets of fusion devices are not connected to each other, so the support area of ​​the entire fusion device is also very limited, thereby reducing the actual use effect of the fusion device; and the smaller fusion device itself can only be installed with a maximum of two sets of fixing screws, thereby reducing the fixed connection effect and stability between the fusion device and the spinal vertebrae; at the same time, the support height of the main body of the existing minimally invasive spinal interlaminar fusion device is fixed, and the minimally invasive spinal interlaminar fusion device is used in different positions on the spinal vertebrae and for different user groups, and the required support height of the fusion device is also different, thereby reducing the scope of application of the fusion device. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a minimally invasive spinal interlaminar fusion device and a non-rigid fixation device thereof.

[0005] The technical solution adopted to solve the above technical problems is: a minimally invasive spinal interlaminar fusion device, including a fusion device mechanism located between two adjacent groups of spinal vertebrae, a connecting mechanism is arranged at the middle position inside the fusion device mechanism, a supporting mechanism is jointly arranged at the top and bottom of the fusion device mechanism, an adjusting mechanism that cooperates with the supporting mechanism is arranged inside the connecting mechanism, and fixing mechanisms that fix the fusion device mechanism to the spinal vertebrae are arranged on both sides of one end of the fusion device mechanism, and the fusion device mechanism includes a supporting ring body, which is composed of a left supporting frame and a right supporting frame, and the outer rings of the left supporting frame and the right supporting frame are respectively provided with a first square opening and a second square opening.

[0006] Through the above technical scheme, the fusion device is designed to be a combination of a left support frame and a right support frame, which reduces the wound when the fusion device is sent into the spinal vertebral body, and then the left support frame and the right support frame located in the spinal vertebral body are connected into an integral support ring body through a connecting mechanism. Secondly, the stability of the connection between the support ring body and the spinal vertebral body can be further improved through four groups of fixing mechanisms. In combination with the supporting mechanism and the adjusting mechanism, the compressive resistance of the two adjacent groups of spinal vertebrae can be improved, and the lifting and lowering of the two groups of supporting main boards can be freely controlled through the adjusting mechanism, thereby accurately controlling the support height of the entire fusion device. After the fusion device mechanism is completely fixed between the two groups of spinal vertebrae, the bone cement injected into the inside of the support ring body will enter between the two adjacent groups of spinal vertebrae through the first square opening and the second square opening and completely wrap the support ring body.

[0007] Furthermore, the connecting mechanism includes a circular groove located in the middle position of one end of the supporting ring body, semi-threaded columns are symmetrically installed on the inner ends of the left supporting frame and the right supporting frame away from the circular groove, and a circular hole is commonly opened at one end of the circular groove close to the semi-threaded column, and semi-fixed rings are symmetrically installed at one end of the circular groove close to the semi-threaded column, a rotating tube is inserted into the circular hole, and a first internal thread that cooperates with the two groups of semi-threaded columns is provided at one end of the rotating tube away from the circular groove, a ring that is sleeved on the outside of the two groups of semi-fixed rings is installed at one end of the outer side of the rotating tube away from the semi-threaded column, and a nut is installed at one end of the outer side of the rotating tube close to the ring.

[0008] Through the above technical scheme, when the left support frame and the right support frame are aligned and merged together, the tail end of the rotating tube is passed through the circular groove, the semi-fixed ring and the inside of the circular hole in sequence until the two groups of semi-threaded columns are inserted into the tail end of the rotating tube, and then the rotating tube is rotated by the nut to fix the two groups of semi-threaded columns in the tail end of the rotating tube, and the sleeve also completely covers the two groups of semi-fixed rings on the left support frame and the right support frame. At this time, the two ends of the left support frame and the right support frame that are in contact are fixedly connected, thereby ensuring the stability of the left support frame and the right support frame after being connected into a support ring body.

[0009] Furthermore, the supporting mechanism includes a supporting main board, which is provided with two groups, and the two groups of supporting main boards are respectively located at the top and bottom ends of the inside of the supporting ring body, and the supporting main board is composed of a left supporting plate and a right supporting plate, and two groups of connecting grooves are symmetrically provided on both sides of the inside of the supporting ring body, and connecting sliders are symmetrically provided on the top and bottom ends of the connecting grooves, and the outer sides of the four groups of connecting sliders at the same height are fixedly connected to the inner sides of the adjacent groups of supporting main boards, and a limiting groove is installed at the middle position of the inner side of the left supporting plate, and the sides of the left and right supporting plates close to each other are respectively provided with matching splicing blocks and splicing grooves.

[0010] Through the above technical solution, when the left support plate and the right support plate are brought close to each other, the splicing block is inserted into the inside of the splicing groove, and then the left support plate and the right support plate are combined and connected into a support main board, and then the support main board is supported by the adjustment mechanism, so that the two groups of support main boards extend from the top and bottom ends inside the support ring body, thereby controlling the support height of the entire fusion device. During the process, the support ring body drives the connecting slider to slide inside the limiting slide groove.

[0011] Furthermore, the adjusting mechanism includes a fixed block located inside the rotating tube close to the semi-threaded column, a return spring is installed at the end of the fixed block away from the semi-threaded column, and a moving block that can move inside the rotating tube is installed at the end of the return spring away from the fixed block, the fixed block is symmetrically hinged with a second support rod at one end close to the moving block, the moving block is symmetrically hinged with a first support rod at one end close to the fixed block, and the end of the first support rod away from the moving block is hinged to one end of an adjacent group of second support rods, the top and bottom of the rotating tube are symmetrically provided with strip holes, and the end of the rotating tube away from the fixed block is threaded with an adjusting threaded rod that cooperates with the moving block through a second internal thread.

[0012] Through the above technical scheme, a screwdriver is used to cooperate with the cross slot to rotate the adjusting threaded rod clockwise, and the second internal thread can be used to allow the adjusting threaded rod to push the movable block to move toward the fixed block inside the rotating tube. During the process, the hinge of the first support rod and the second support rod are lifted up from the strip hole, and the hinge of the first support rod and the second support rod are lifted up and sink into the interior of the limiting slide groove and push the two groups of support main boards to extend from the top and bottom ends of the inside of the support ring body. During the process, the hinge of the first support rod and the second support rod slides inside the limiting slide groove, and by controlling the degree of penetration of the adjusting threaded rod into the rotating tube, the height of the lifting and lowering of the two groups of support ring bodies can be accurately controlled, thereby accurately adjusting the support height of the entire fusion device.

[0013] Furthermore, the fixing mechanism includes two groups of grooves opened at one end of the supporting main board, and two groups of hidden grooves are symmetrically opened at the same end of the left support frame and the right support frame, and the interior of the hidden groove is provided with a fixing screw hole connected to the interior of the supporting ring body, and the internal thread of the fixing screw hole is provided with a fixing screw fixedly connected to the spinal vertebra.

[0014] Through the above technical solution, after the left support frame and the right support frame are connected to form a support ring body and support two adjacent groups of spinal vertebrae, a screwdriver is used to screw the fixing screws into the fixing screw holes, and then the fixing screws are continued to be rotated until the tips of the four groups of fixing screws are completely threaded and fixed inside the two groups of spinal vertebrae, so that the entire fusion device can be firmly supported between the two adjacent groups of spinal vertebrae.

[0015] Furthermore, a square injection port is symmetrically provided at the same end of the left support frame and the right support frame, and through holes are evenly provided at the top and bottom of the left support frame and the right support frame.

[0016] Through the above technical solution, tweezers are used to clamp the square injection port and the common edge of the square injection port, which makes it convenient for the surgeon to deliver the left support frame and the right support frame through the surgical incision between the two groups of spinal vertebrae, and then inject bone cement into the support ring body through the square injection port. After the bone cement in the support ring body is filled, it enters between the two adjacent groups of spinal vertebrae through the first square port, the second square port and the through hole respectively and completely wraps the support ring body.

[0017] Furthermore, the length of the adjusting threaded rod is greater than the length of the second internal thread, and a cross groove is provided at one end of the adjusting threaded rod away from the moving block.

[0018] Through the above technical solution, a screwdriver can be used in conjunction with the cross slot to rotate the adjusting threaded rod located in the rotating tube, and the second internal thread can allow the adjusting threaded rod to continue to penetrate deeper into the rotating tube, thereby pushing the moving block to move toward the fixed block.

[0019] Furthermore, a non-rigid fixation device for a minimally invasive spinal interlaminar fusion device includes connecting screw holes, wherein two groups of connecting screw holes are provided, and the two groups of connecting screw holes are respectively located on one side of the same end of two adjacent groups of spinal vertebrae, and a non-rigid mechanism is commonly provided inside the two groups of connecting screw holes, and the non-rigid mechanism includes self-tapping screws, wherein two groups of self-tapping screws are provided, and the two groups of self-tapping screws are respectively threadedly installed in the two groups of connecting screw holes, a connecting pipe assembly is provided on the outside of the self-tapping screws, an adjustment assembly is provided inside the connecting pipe assembly, and the two groups of adjustment assemblies are connected by a connecting steel wire.

[0020] Through the above technical solution, the connecting pipe assembly is fixed to both sides of the same end of the spinal vertebrae through self-tapping screws and connecting screw holes, and then the actual length of the connecting steel wire between the two groups of connecting pipe assemblies is adjusted by controlling the adjustment assembly, thereby ensuring that the entire non-rigid mechanism can provide stable pulling force for the two adjacent groups of spinal vertebrae.

[0021] Furthermore, the connecting pipe assembly includes a fixing pipe located outside the self-tapping screw, a fixing pipe is symmetrically provided with a slot at one end away from the self-tapping screw, and a third internal thread is provided inside the fixing pipe.

[0022] Through the above technical solution, the self-tapping screw can be stably installed in the connecting screw hole by using a screwdriver in conjunction with the slot, and the third internal thread in the fixed tube helps to cooperate with the adjustment component to adjust the tightness of the connecting steel wire.

[0023] Furthermore, the adjustment component includes an adjusting screw, which is arranged inside the fixing tube through a third internal thread. A spiral receiving groove is provided on the outer side of the adjusting screw at one end away from the self-tapping screw, and a fixing socket that cooperates with the connecting steel wire is provided inside the spiral receiving groove at one end close to the self-tapping screw.

[0024] Through the above technical solution, the two ends of the connecting steel wire are respectively inserted into the two groups of fixed sockets, and the adjusting screw is spirally rotated into the interior of the fixed tube by a screwdriver. As the adjusting screw continues to go deeper into the interior of the fixed tube, the connecting steel wire is gradually wound in the spiral receiving groove on the surface of the adjusting screw until the connecting steel wire between the two groups of adjusting screws is completely straightened, thereby providing a stable pulling force for the two adjacent groups of spinal vertebrae.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention reduces the size of the incision in which the fusion device is inserted into the spinal vertebra by designing the fusion device as a combination of a left support frame and a right support frame, and then connects the left support frame and the right support frame located in the spinal vertebra to form an integral support ring body through a connecting mechanism, thereby increasing the support area of ​​the entire fusion device while ensuring the stability of the fusion device during the support process; (2) The present invention provides two sets of fixing mechanisms at the same end of the left support frame and the right support frame, respectively, thereby ensuring the stability of the fixed connection between a single left support frame or a right support frame and the spinal vertebra, and at the same time, because the left support frame The right support frame is connected to the right support frame by a connecting mechanism to form an integral support ring body. The stability of the connection between the support ring body and the spinal vertebrae can be further improved through four sets of fixing mechanisms. A non-rigid mechanism is also installed on one side of one end of the spinal vertebrae through a connecting screw hole, which can stably hold the two adjacent groups of spinal vertebrae. Combined with the supporting mechanism and the adjusting mechanism, the compression or tension resistance of the two adjacent groups of spinal vertebrae can be improved; (3) The present invention freely controls the lifting and lowering of the two groups of support main boards through the adjusting mechanism, and then accurately controls the support height of the entire fusion device, so as to meet the requirements that the fusion device is suitable for different positions on the spinal vertebrae or different user groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a first perspective structural diagram of the present invention; Figure 2 It is a second viewing angle structural diagram of the present invention; Figure 3 This is a structural diagram of the fusion device of the present invention from a first perspective; Figure 4 is a structural diagram of the fusion device of the present invention from a second viewing angle; Figure 5 is a schematic diagram of the structure inside the fusion device of the present invention; Figure 6 It is a three-dimensional schematic diagram of the left support frame and the right support frame of the present invention after being separated; Figure 7 This is a structural diagram of the right support frame of the present invention from a first perspective; Figure 8 is a second viewing angle structural diagram of the right support frame of the present invention; Fig. 9 It is a third perspective structural diagram of the right support frame of the present invention; Fig.10 It is a three-dimensional schematic diagram of the supporting mainboard of the present invention; Fig.11 It is a three-dimensional schematic diagram of the left support plate and the right support plate of the present invention being separated; Fig.12 is a three-dimensional schematic diagram of the adjusting threaded rod of the present invention after leaving the interior of the rotating tube; Fig.13 It is a three-dimensional schematic diagram of the collar and the nut of the present invention; Fig.14 is a schematic longitudinal section diagram of a rotating tube of the present invention; Fig.15 It is a three-dimensional schematic diagram of the present invention in which the fixed block is connected to the moving block via a return spring; Fig.16 is a three-dimensional schematic diagram of the non-rigid connection mechanism of the present invention; Fig.17 is a three-dimensional schematic diagram of the adjustment component of the present invention after it leaves the connecting pipe component; Fig.18 It is a three-dimensional schematic diagram of the adjustment component of the present invention.

[0027] Figure numerals: 1. spinal vertebra; 2. fusion mechanism; 201. left support frame; 202. right support frame; 203. first square opening; 204. second square opening; 205. square injection port; 206. through hole; 207. support ring body; 3. connecting mechanism; 301. semi-threaded column; 302. round groove; 303. round hole; 304. semi-fixed ring; 305. rotating tube; 306. first internal thread; 307. collar; 308. nut; 4. supporting mechanism; 401. connecting slide groove; 402. connecting slider; 403. left support plate; 404. right support plate; 405. limiting slide groove; 406. splicing block; 407. splicing groove; 408. support main board; 5. adjustment Section mechanism; 501, fixed block; 502, moving block; 503, return spring; 504, first support rod; 505, second support rod; 506, strip hole; 507, adjusting threaded rod; 508, second internal thread; 509, cross slot; 6, fixing mechanism; 601, fixing screw hole; 602, fixing screw; 603, groove; 604, hidden slot; 7, non-rigid mechanism; 701, self-tapping screw; 702, connecting pipe assembly; 7021, fixing pipe; 7022, slot; 7023, third internal thread; 703, adjusting assembly; 7031, adjusting screw; 7032, spiral storage slot; 7033, fixing socket; 704, connecting wire; 8, connecting screw hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0029] like Figure 1 - Fig.15As shown, a minimally invasive spinal interlaminar fusion device includes a fusion device mechanism 2 located between two adjacent groups of spinal vertebrae 1, a connecting mechanism 3 is arranged at the middle position inside the fusion device mechanism 2, the fusion device mechanism 2 includes a support ring body 207, the support ring body 207 is composed of a left support frame 201 and a right support frame 202, the outer rings of the left support frame 201 and the right support frame 202 are respectively provided with a first square opening 203 and a second square opening 204, the connecting mechanism 3 includes a support ring body 207 at one end of the middle position The left support frame 201 and the right support frame 202 are provided with a circular groove 302, and a semi-threaded column 301 is symmetrically installed at one end of the inner side of the left support frame 201 and the right support frame 202 away from the circular groove 302. A circular hole 303 is commonly opened at one end of the circular groove 302 close to the semi-threaded column 301. A semi-fixed ring 304 is symmetrically installed at one end of the circular groove 302 close to the semi-threaded column 301. A rotating tube 305 is inserted into the circular hole 303, and a first end of the rotating tube 305 away from the circular groove 302 is provided with a first end that cooperates with the two groups of semi-threaded columns 301. The inner thread 306, the end of the outer side of the rotating tube 305 away from the semi-threaded column 301 is installed with a collar 307 sleeved on the outer side of the two groups of semi-fixed rings 304, and the end of the outer side of the rotating tube 305 close to the collar 307 is installed with a nut 308. The right support frame 202 is sent through the surgical incision to the right side between the two groups of spinal vertebrae 1, and then the left support frame 201 is also sent to the left side between the two groups of spinal vertebrae 1 in the same way, and the left support frame 201 and the right support frame 202 are aligned and merged, and the rotating tube 305 is fixed. The tail end passes through the circular groove 302, the semi-fixed ring 304 and the circular hole 303 in sequence until the two groups of semi-threaded columns 301 are inserted into the tail end of the rotating tube 305, and then the rotating tube 305 is rotated by the nut 308 to fix the two groups of semi-threaded columns 301 in the tail end of the rotating tube 305, and the ring 307 also completely covers the two groups of semi-fixed rings 304 on the left support frame 201 and the right support frame 202. At this time, the left support frame 201 and the right support frame 202 can be stably connected to form a support ring body 207.

[0030] like Figure 3 - Fig.12 and Fig.14 - Fig.15As shown, a support mechanism 4 is provided at the top and bottom of the fusion mechanism 2, an adjustment mechanism 5 cooperating with the support mechanism 4 is provided inside the connection mechanism 3, the support mechanism 4 includes a support main board 408, and two groups of support main boards 408 are provided, and the two groups of support main boards 408 are respectively located at the top and bottom ends of the support ring body 207, and the support main board 408 is composed of a left support plate 403 and a right support plate 404. Two groups of connecting grooves 401 are symmetrically provided on both sides of the support ring body 207, and connecting sliders 402 are symmetrically provided at the top and bottom ends of the connecting grooves 401. The outer sides of the four groups of connecting sliders 402 at the same height are fixedly connected to the inner sides of the adjacent groups of support main boards 408. A limited sliding groove 405 is installed in the middle position of the left and right sides, and a matching splicing block 406 and a splicing groove 407 are respectively provided on the side where the left support frame 201 and the right support frame 202 are close to each other. In the process of aligning and merging the left support frame 201 and the right support frame 202, the two pairs of splicing blocks 406 are respectively inserted into the inside of the two groups of splicing grooves 407. In the process of connecting the two pairs of left support plates 403 and the right support plates 404 into two groups of support main boards 408, it is helpful for the surgeon to align the left support frame 201 and the right support frame 202, and then facilitate the subsequent stable connection of the left support frame 201 and the right support frame 202 by rotating the tube 305 in cooperation with the two groups of semi-threaded columns 301. The adjusting mechanism 5 includes a splicing block 406 and a splicing groove 407 located inside the rotating tube 305 near the semi-threaded columns 301. A fixed block 501 inside the column 301, a return spring 503 is installed at one end of the fixed block 501 away from the semi-threaded column 301, and a moving block 502 that can move inside the rotating tube 305 is installed at one end of the return spring 503 away from the fixed block 501, a second support rod 505 is symmetrically hinged at one end of the fixed block 501 close to the moving block 502, a first support rod 504 is symmetrically hinged at one end of the moving block 502 close to the fixed block 501, and an end of the first support rod 504 away from the moving block 502 is hinged to one end of an adjacent group of second support rods 505, strip holes 506 are symmetrically opened at the top and bottom of the rotating tube 305, and the end of the rotating tube 305 away from the fixed block 501 is threadedly provided with a second internal thread 508 There is an adjusting threaded rod 507 that cooperates with the moving block 502. By rotating the adjusting threaded rod 507 clockwise, the adjusting threaded rod 507 pushes the moving block 502 to move toward the fixed block 501 inside the rotating tube 305. During the process, the hinges of the first support rod 504 and the second support rod 505 are lifted up from the bar hole 506 and sink into the limiting slide groove 405, and then push the two groups of support main boards 408 to extend out from the top and bottom ends inside the supporting ring body 207. During the process, the hinges of the first support rod 504 and the second support rod 505 slide inside the limiting slide groove 405. By controlling the depth of the adjusting threaded rod 507 inside the rotating tube 305, the height of the lifting and lowering of the two groups of support ring bodies 207 can be accurately controlled.

[0031] like Figure 3 - Fig.11 As shown, both sides of one end of the fusion device mechanism 2 are provided with fixing mechanisms 6 for fixing the fusion device mechanism 2 to the spinal vertebral body 1, and the fixing mechanism 6 includes two groups of grooves 603 opened at one end of the support main board 408, and two groups of hidden grooves 604 are symmetrically opened at the same end of the left support frame 201 and the right support frame 202, and the interior of the hidden groove 604 is provided with a fixing screw hole 601 connected to the interior of the support ring body 207, and the internal thread of the fixing screw hole 601 is provided with a fixing screw 602 fixedly connected to the spinal vertebral body 1, and the left support frame 201 and the right support frame 202 are connected to form the support ring body 207. After supporting two adjacent groups of spinal vertebrae 1, use a screwdriver to screw the fixing screws 602 into the fixing screw holes 601. At this time, the two groups of fixing screws 602 on the left support frame 201 and the right support frame 202 are one group tilted upward and one group tilted downward. Then continue to rotate the fixing screws 602 until the tips of the four groups of fixing screws 602 are completely threaded and fixed inside the two groups of spinal vertebrae 1. The spacing between the two groups of fixing screws 602 tilted upward is the same as the spacing between the two groups of fixing screws 602 tilted downward, so that the entire fusion device can be firmly supported between the two adjacent groups of spinal vertebrae 1.

[0032] like Figure 1 - Figure 2 and Fig.16 - Fig.18As shown, a non-rigid fixation device for a minimally invasive spinal interlaminar fusion device includes connecting screw holes 8, two groups of connecting screw holes 8 are provided, and the two groups of connecting screw holes 8 are located on one side of the same end of two adjacent groups of spinal vertebrae 1, and the two groups of connecting screw holes 8 are commonly provided with a non-rigid mechanism 7 inside, and the non-rigid mechanism 7 includes a self-tapping screw 701, two groups of self-tapping screws 701 are provided, and the two groups of self-tapping screws 701 are respectively threadedly installed in the two groups of connecting screw holes 8, and a connecting pipe assembly 70 is provided on the outside of the self-tapping screw 701 2. An adjusting assembly 703 is provided inside the connecting pipe assembly 702, and two sets of adjusting assemblies 703 are connected by connecting wires 704. The connecting pipe assembly 702 includes a fixing pipe 7021 located outside the self-tapping screw 701, and a clamping groove 7022 is symmetrically opened at one end of the fixing pipe 7021 away from the self-tapping screw 701. A third internal thread 7023 is provided inside the fixing pipe 7021. The adjusting assembly 703 includes an adjusting screw 7031, and the adjusting screw 7031 is connected to the self-tapping screw 701 through the third internal thread 702. The thread is arranged inside the fixing tube 7021, and a spiral receiving groove 7032 is provided at the end of the outer side of the adjusting screw 7031 away from the self-tapping screw 701, and a fixing plug hole 7033 cooperating with the connecting wire 704 is provided inside the spiral receiving groove 7032 at the end close to the self-tapping screw 701. First, the connecting screw holes 8 are punched on one side of the same end of the two groups of spinal vertebrae 1, and then the self-tapping screw 701 can be stably installed in the connecting screw hole 8 by using a screwdriver in combination with the slot 7022. Then, Insert the two ends of the connecting wire 704 into the two sets of fixed sockets 7033 respectively, and use a screwdriver to spirally rotate the adjusting screw 7031 into the interior of the fixed tube 7021. As the adjusting screw 7031 continues to go deeper into the fixed tube 7021, the connecting wire 704 is gradually wound in the spiral receiving groove 7032 on the surface of the adjusting screw 7031 until the connecting wire 704 between the two sets of adjusting screws 7031 is completely straightened, thereby providing a stable pulling force for the two adjacent sets of spinal vertebrae 1.

[0033] The working principle of this embodiment is as follows: by clamping the common edge of the square injection port 205 and the first square port 203 with tweezers, the right support frame 202 is inserted from the surgical incision to the right side between the two groups of spinal vertebrae 1, and then the left support frame 201 is also inserted into the left side between the two groups of spinal vertebrae 1 in the same way, and the left support frame 201 and the right support frame 202 are aligned and merged, and the splicing block 406 is inserted into the splicing groove 407, and the two pairs of left support plates 403 and right support plates 404 are connected to form two groups of support main boards 408, and then the rotating tube 30 is rotated. The tail end of the first support rod 504 is passed through the inside of the circular groove 302, the semi-fixed ring 304 and the circular hole 303 in sequence until the two groups of semi-threaded columns 301 are inserted into the tail end of the rotating tube 305, and then the rotating tube 305 is rotated by the nut 308 to fix the two groups of semi-threaded columns 301 in the tail end of the rotating tube 305, and then the adjusting threaded rod 507 is rotated by a screwdriver in conjunction with the cross slot 509, so that the tail end of the adjusting threaded rod 507 pushes the moving block 502 to move inside the rotating tube 305, so that the hinge of the first support rod 504 and the second support rod 505 is fixed. The first support rod 504 and the second support rod 505 are lifted up, and the hinged joint of the first support rod 504 and the second support rod 505 is lifted up and sinks into the interior of the limiting slide groove 405 and pushes the two groups of support main boards 408 to extend from the top and bottom ends of the support ring body 207. Then, the support ring body 207 is fixedly connected to the top and bottom spinal vertebrae 1 respectively through the fixing mechanism 6, and then bone cement is filled into the support ring body 207 through the square injection port 205. The bone cement inside the support ring body 207 also enters the two adjacent groups of spinal vertebrae through the first square port 203 and the second square port 204. The support ring body 207 is completely wrapped between the vertebral bodies 1, and then connecting screw holes 8 are symmetrically punched on both sides of the same side of the two groups of spinal vertebrae 1, and then the self-tapping screws 701 are spirally fixed inside the connecting screw holes 8, and then the two ends of the connecting wire 704 are respectively inserted into the two groups of fixed sockets 7033, and the adjusting screws 7031 are spirally turned into the interior of the fixing tube 7021 by a screwdriver. The connecting wire 704 is gradually wound in the spiral receiving groove 7032 until the connecting wire 704 between the two groups of adjusting screws 7031 is completely straightened.

[0034] The above description 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 interlaminar fusion device, comprising a fusion device mechanism (2) located between two adjacent groups of spinal vertebrae (1), characterized in that: A connecting mechanism (3) is arranged at a middle position inside the fusion mechanism (2); a supporting mechanism (4) is arranged at the top and bottom of the fusion mechanism (2); an adjusting mechanism (5) cooperating with the supporting mechanism (4) is arranged inside the connecting mechanism (3); fixing mechanisms (6) for fixing the fusion mechanism (2) to the spinal vertebra (1) are arranged on both sides of one end of the fusion mechanism (2); the fusion mechanism (2) comprises a supporting ring body (207); the supporting ring body (207) is composed of a left supporting frame (201) and a right supporting frame (202); and the outer rings of the left supporting frame (201) and the right supporting frame (202) are respectively provided with a first square opening (203) and a second square opening (204).

2. The minimally invasive spinal interlaminar fusion device according to claim 1, characterized in that: The connecting mechanism (3) comprises a circular groove (302) located at the middle position of one end of the supporting ring body (207); semi-threaded columns (301) are symmetrically mounted on the inner ends of the left supporting frame (201) and the right supporting frame (202) away from the circular groove (302); a circular hole (303) is commonly formed at the inner ends of the circular groove (302) close to the semi-threaded columns (301); and a semi-fixed ring (304) is symmetrically mounted on the inner ends of the circular groove (302) close to the semi-threaded columns (301). A rotating tube (305) is inserted into the circular hole (303), and a first internal thread (306) that cooperates with the two groups of semi-threaded columns (301) is provided at one end of the rotating tube (305) that is away from the circular groove (302), a sleeve ring (307) that is sleeved on the outside of the two groups of semi-fixed rings (304) is installed at one end of the rotating tube (305) that is away from the semi-threaded columns (301), and a nut (308) is installed at one end of the rotating tube (305) that is close to the sleeve ring (307).

3. The minimally invasive spinal interlaminar fusion device according to claim 1, characterized in that: The support mechanism (4) comprises a support main board (408), wherein two groups of the support main boards (408) are provided, and the two groups of support main boards (408) are respectively located at the top and bottom of the support ring body (207), and the support main board (408) is composed of a left support plate (403) and a right support plate (404). Two groups of connecting slide grooves (401) are symmetrically provided on both sides of the support ring body (207), and connecting sliders (402) are symmetrically provided at the top and bottom of the connecting slide grooves (401), and the outer sides of the four groups of connecting sliders (402) at the same height are fixedly connected to the inner sides of the adjacent groups of support main boards (408), and a limiting slide groove (405) is installed at the middle position of the inner side of the left support plate (403), and the left support plate (403) and the right support plate (404) are respectively provided with mutually matching splicing blocks (406) and splicing grooves (407) on the sides close to each other.

4. The minimally invasive spinal interlaminar fusion device according to claim 1, characterized in that: The adjusting mechanism (5) comprises a fixed block (501) located inside the rotating tube (305) close to the semi-threaded column (301); a return spring (503) is installed at one end of the fixed block (501) away from the semi-threaded column (301); and a moving block (502) movable inside the rotating tube (305) is installed at one end of the return spring (503) away from the fixed block (501); a second support rod (505) is symmetrically hinged at one end of the fixed block (501) close to the moving block (502); One end of the block (502) close to the fixed block (501) is symmetrically hinged with a first support rod (504), and one end of the first support rod (504) away from the moving block (502) is hinged to one end of an adjacent group of second support rods (505), and the top and bottom of the rotating tube (305) are symmetrically provided with strip holes (506), and the end of the rotating tube (305) away from the fixed block (501) is threadedly provided with an adjustment threaded rod (507) that cooperates with the moving block (502) through a second internal thread (508).

5. The minimally invasive spinal interlaminar fusion device according to claim 1, characterized in that: The fixing mechanism (6) comprises two groups of grooves (603) opened at one end of the supporting main board (408), two groups of hidden grooves (604) are symmetrically opened at the same end of the left supporting frame (201) and the right supporting frame (202), and the interior of the hidden groove (604) is provided with a fixing screw hole (601) connected to the interior of the supporting ring body (207), and the internal thread of the fixing screw hole (601) is provided with a fixing screw (602) fixedly connected to the spinal vertebral body (1).

6. The minimally invasive spinal interlaminar fusion device according to claim 1, characterized in that: A square injection port (205) is symmetrically provided at the same end of the left support frame (201) and the right support frame (202), and through holes (206) are evenly provided at the top and bottom of the left support frame (201) and the right support frame (202).

7. The minimally invasive spinal interlaminar fusion device according to claim 4, characterized in that: The length of the adjusting threaded rod (507) is greater than the length of the second internal thread (508), and a cross groove (509) is provided at one end of the adjusting threaded rod (507) away from the moving block (502).

8. A non-rigid fixation device for a minimally invasive spinal interlaminar fusion cage as claimed in any one of claims 1 to 7, comprising a connecting screw hole (8), characterized in that: The connecting screw holes (8) are provided in two groups, and the two groups of connecting screw holes (8) are respectively located on one side of the same end of two adjacent groups of spinal vertebrae (1); a non-rigid mechanism (7) is commonly provided inside the two groups of connecting screw holes (8); the non-rigid mechanism (7) comprises a self-tapping screw (701); the self-tapping screw (701) is provided in two groups, and the two groups of self-tapping screws (701) are respectively threadedly installed in the two groups of connecting screw holes (8); a connecting pipe assembly (702) is provided on the outside of the self-tapping screw (701); an adjusting assembly (703) is provided inside the connecting pipe assembly (702); and the two groups of adjusting assemblies (703) are connected via a connecting steel wire (704).

9. The non-rigid fixation device for minimally invasive spinal interlaminar fusion according to claim 8, characterized in that: The connecting pipe assembly (702) comprises a fixing pipe (7021) located outside the self-tapping screw (701), a fixing pipe (7021) having a symmetrically formed retaining groove (7022) at one end of the fixing pipe (7021) away from the self-tapping screw (701), and a third internal thread (7023) disposed inside the fixing pipe (7021).

10. The non-rigid fixation device for minimally invasive spinal interlaminar fusion according to claim 8, characterized in that: The adjustment assembly (703) comprises an adjustment screw (7031), wherein the adjustment screw (7031) is threadedly arranged inside the fixing tube (7021) via a third internal thread (7023), a spiral receiving groove (7032) is provided on the outer side of the adjustment screw (7031) at one end away from the self-tapping screw (701), and a fixing socket (7033) cooperating with the connecting steel wire (704) is provided on the inner side of the spiral receiving groove (7032) at one end close to the self-tapping screw (701).

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