Minimally invasive combined type interbody fusion cage

Abstract

The invention discloses a minimally invasive combined type interbody fusion cage, and belongs to the technical field of interbody fusion cages, the minimally invasive combined type interbody fusion cage comprises two symmetrical fusion cage main shells, and one side of each fusion cage main shell is provided with a fusion cage auxiliary shell; a fixing mechanism is installed in the fusion cage auxiliary shell, a first supporting mechanism is installed in the center of the two fusion cage main shells, and a second supporting mechanism is installed in the first supporting mechanism. By designing the fusion cage main shells, the first supporting mechanism and the second supporting mechanism, the opening amplitude of the two sides of the two fusion cage main shells can be adjusted according to the specific intervertebral size, so that the fusion cage is fully attached to the vertebral bodies, the fusion effect of the two vertebral bodies is greatly improved, and the postoperative pain of a patient is relieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of intervertebral fusion devices, and in particular relates to a minimally invasive combined intervertebral fusion device. Background Art

[0002] An intervertebral fusion device is a medical device used in spinal surgery to promote bone fusion in the spinal space and provide stability to the vertebrae. It is usually implanted in the space between the vertebrae (i.e., the intervertebral space) to stabilize the two adjacent vertebrae together with the help of bone fusion or bone graft materials, reduce or eliminate the activity of the intervertebral disc, and achieve the purpose of relieving pain. In some operations, the intervertebral fusion device stabilizes the spine through a permanent structure, avoiding later problems caused by excessive movement, such as intervertebral disc degeneration or regeneration problems. In general, the role of the intervertebral fusion device is to promote bone fusion, provide support, relieve pain and compression, and ultimately help patients restore the function and stability of the spine and improve their quality of life.

[0003] The existing intervertebral fusion device has a relatively simple structural design. Usually, spikes and a supporting mechanism are provided on the outer shell of the device. The outer shell of the device is expanded by the supporting mechanism, and the spikes on the outer shell are clamped between the two vertebrae to firmly connect the device to the vertebrae. However, the space between the two cones is irregular, so that the outer shell of the device cannot effectively contact the inner surface of the cone after it is expanded, so that the vertebrae may slip or dislocate, further increasing the burden on the spine, and even causing compression of the spinal cord or nerve roots, increasing the patient's pain. 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 combined intervertebral fusion device.

[0005] The technical solution adopted to solve the above technical problems is: a minimally invasive combined intervertebral fusion device, comprising two symmetrical fusion device main shells, one side of the two fusion device main shells is provided with a fusion device auxiliary shell; A fixing mechanism is installed in the auxiliary shell of the fusion device, a first supporting mechanism is installed in the center of the two main shells of the fusion device, and a second supporting mechanism is installed in the first supporting mechanism.

[0006] Furthermore, the outer walls of the two fusion device main shells are provided with a plurality of first cone spikes, the front and rear ends of the two fusion device main shells are each provided with two limiting holes, the front and rear ends of the two fusion device main shells are each provided with two first notches, and the front and rear end centers of the two fusion device main shells are each provided with a second notch, and the plurality of first notches are respectively located at the bottom of the corresponding limiting holes.

[0007] Through the above technical solution, both main shells of the two fusion devices are made of polymer materials and are deformable. When implanted in an intervertebral space with a regular space, the two main shells of the fusion device are implanted in the two intervertebral spaces, and are supported simultaneously by the first supporting mechanism and the second supporting mechanism, so that the two main shells of the fusion device fit the inner wall of the vertebral body and are clamped by multiple first cone thorns. When implanted in an intervertebral space with an irregular space, according to the contact surface of the two vertebrae, one side of the two main shells of the fusion device can be first opened, and then the left side close to the two second notches can be slowly opened. The two second notches are dividing points, so that the two main shells of the fusion device can be opened into an inclined surface to fit different vertebrae. The functionality is strong, and there is no need to replace the entire fusion device. It can be adjusted according to the size of the intervertebral space to meet different needs.

[0008] Furthermore, the front and rear ends of one side of the fusion device sub-shell are fixedly connected to a connecting frame, the other side between the two connecting frames is fixedly connected to a fixing plate, a movable groove is provided at the center of the fusion device sub-shell, rectangular grooves are provided at the top and bottom of the fusion device sub-shell, a plurality of slots are provided on the inner wall of the fusion device sub-shell near the movable groove, limiting slots are provided at the front and rear ends of one side of the fusion device sub-shell, and an axle seat is fixedly connected to the inner center of the fixing plate.

[0009] Through the above technical solution, the fusion device sub-shell is used for the installation of the fixing mechanism, the first supporting mechanism and the second supporting mechanism, the movable groove is used for the movement of the cam, the connecting ring, the movable plate, the push block and the connecting plate, the multiple clamping grooves are used for the clamping of the clamping teeth, thereby locking the entire fixing mechanism, and the limit groove is used for the sliding of the movable plate to achieve a limiting effect.

[0010] Furthermore, the fixing mechanism includes a connecting sleeve rotatably connected to one side of the center of the fusion device sub-shell, one end of the connecting sleeve is fixedly connected to a cam, one end of the cam is fixedly connected to a connecting ring, one end of the connecting ring is fixedly connected to a plurality of annularly distributed latching teeth on the outside, one end of the connecting ring is fixedly connected to a plurality of annularly distributed fixing blocks on the outside, a plurality of the fixing blocks are fixedly connected to the corresponding latching teeth with a spring, one end of the connecting ring is fixedly connected to a first locking head, the front and rear ends of the cam are provided with movable plates, the two movable plates are fixedly connected with push blocks, the two rectangular grooves are provided with support plates, the outer surfaces of the two support plates are fixedly connected with a plurality of second cone spikes, the front and rear ends of the inner surfaces of the two support plates are fixedly connected to connecting plates, and the front and rear ends of the movable grooves are fixedly connected with two limit seats.

[0011] Through the above technical solution, when the fusion device is implanted between two vertebrae, the first locking head is first rotated by a tool, so that the first locking head drives the connecting ring to rotate, and the connecting ring drives the cam to rotate, so that the cam drives the two movable plates to move, thereby driving the two push blocks to move, so that the two push blocks push the corresponding connecting plates, so that every two connecting plates move toward the outer ends, thereby driving the two support plates to prop up outward, and clamping with the two vertebrae through multiple second cone spikes, which facilitates the subsequent opening and clamping of the two fusion device sub-shells to provide a fixing effect.

[0012] Furthermore, the cam and the connecting ring are both located in the movable groove, and in the assembled state, the plurality of latching teeth are respectively engaged with the corresponding latching grooves.

[0013] Through the above technical solution, the rotation of the connecting ring drives the multiple locking teeth to rotate. When the two support plates are clamped with the two vertebral bodies, the multiple locking teeth fit into the corresponding slots to achieve the reverse locking of the connecting ring, thereby reverse locking of the cam and fixing of the two support plates.

[0014] Furthermore, one end of the two movable plates is respectively slidably connected to the corresponding limiting grooves, the two push blocks are respectively fitted to one end of the corresponding connecting plates, and the multiple connecting plates are respectively slidably connected to the corresponding limiting seats.

[0015] Through the above technical solution, since the contact surfaces between the two push blocks and the corresponding connecting plates are inclined surfaces, and the connecting plates are limited by the limiting seats, when the push blocks are pushed, the connecting plates are pushed as well.

[0016] Furthermore, the first supporting mechanism includes a fixing frame fixedly connected between two connecting frames, the inner wall of the fixing frame is rotatably connected with a rotating cylinder, one end of the rotating cylinder is fixedly connected with a second locking head, a first thread is provided at the center of the outer wall of the rotating cylinder, the rotating cylinder is threadedly connected with a first supporting block through the first thread, and the top and bottom of the front and rear ends of the first supporting block are fixedly connected with two first limit pins and two second limit pins.

[0017] Through the above technical solution, when the two fusion device sub-shells need to be spread apart, the second locking head is rotated by a tool so that the second locking head drives the rotating drum to rotate, thereby driving the first support block to move, thereby driving the multiple first limit pins and the multiple second limit pins to move, and under the limitation of the corresponding limit holes, the two fusion device sub-shells are slowly spread apart, and thus slowly clamped between the two vertebrae.

[0018] Furthermore, the second supporting mechanism includes a rotating shaft rotatably connected to the inner wall of the rotating cylinder, one end of the rotating shaft is fixedly connected to a third lock, the outer wall of the rotating shaft is provided with a second thread, the rotating shaft is threadedly connected to a second support block through the second thread, and the front and rear end tops and bottoms of the second support block are fixedly connected to two third limit pins and two fourth limit pins.

[0019] Through the above technical solution, the third lock is rotated by a tool, so that the third lock drives the rotating shaft to rotate, thereby driving the second support block to move, thereby driving multiple third limit pins and multiple fourth limit pins to move, and under the limitation of the corresponding limit holes, the two fusion device sub-shells are slowly spread apart, and thus slowly clamped between the two vertebrae.

[0020] Furthermore, one end of the outer wall of the rotating drum is rotatably connected to the inner wall of the connecting sleeve, multiple first limit pins and multiple third limit pins are respectively slidably connected to the corresponding limit holes, and multiple second limit pins and multiple fourth limit pins are respectively located in the corresponding first slots.

[0021] Through the above technical solution, when the first support block and the second support block move, the corresponding second limit pin is driven to move in the corresponding first slot, so that the two fusion device sub-shells are slowly expanded. The expansion range of the two fusion device sub-shells can be adjusted according to the size of the space between the two vertebrae of the patient, so that one side can have a larger amplitude and the other side can have a smaller amplitude, thus meeting different needs and having strong functionality.

[0022] The beneficial effects of the present invention are as follows: (1) By designing the main shell of the fusion device, the first supporting mechanism and the second supporting mechanism, the expansion range of the two sides of the two fusion device main shells can be adjusted according to the specific intervertebral size, so that the fusion device and the vertebral body are fully fitted, which greatly improves the fusion effect of the two vertebrae and reduces the patient's postoperative pain; (2) By designing the auxiliary shell and the fixing mechanism of the fusion device, the fusion device is first clamped between the two vertebrae through the fixing mechanism, which facilitates the subsequent full clamping of the entire fusion device between the two vertebrae, thereby improving the connectivity and stability of the fusion device and the two vertebrae, thereby improving the fusion efficiency of the vertebrae. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a first-view appearance diagram of the present invention; Figure 2 is a second viewing angle appearance diagram of the present invention; Figure 3 It is the overall front view of the present invention; Figure 4 is an overall cross-sectional view of the present invention; Figure 5 It is a schematic diagram of the main shell structure of the fusion device of the present invention; Figure 6 It is a schematic diagram of the structure of the fusion device sub-shell of the present invention; Figure 7 It is a schematic diagram of the structure of the fusion device sub-shell and the fixing mechanism of the present invention; Figure 8 It is a schematic diagram of the internal structure of the fixing mechanism of the present invention; Fig. 9is an exploded view of the fixing mechanism of the present invention; Fig.10 It is a side view of some parts of the fixing mechanism of the present invention; Fig.11 It is a schematic structural diagram of the first supporting mechanism and the second supporting mechanism of the present invention.

[0024] Figure numerals: 1, fusion device main shell; 11, first cone thorn; 12, limiting hole; 13, first notch; 14, second notch; 2, fusion device auxiliary shell; 21, connecting frame; 22, fixing plate; 23, movable groove; 24, rectangular groove; 25, clamping groove; 26, limiting groove; 27, shaft seat; 3, fixing mechanism; 301, connecting sleeve; 302, cam; 303, connecting ring; 304, clamping tooth; 305, fixing block; 306, spring; 307, first lock; 308, movable plate; 30 9. Push block; 310. Support plate; 311. Second cone spike; 312. Connecting plate; 313. Limit seat; 4. First supporting mechanism; 401. Fixed frame; 402. Rotating drum; 403. Second locking head; 404. First thread; 405. First supporting block; 406. First limiting pin; 407. Second limiting pin; 5. Second supporting mechanism; 501. Rotating shaft; 502. Third locking head; 503. Second thread; 504. Second supporting block; 505. Third limiting pin; 506. Fourth limiting pin. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1-Figure 5As shown, a minimally invasive combined intervertebral fusion device of the present embodiment comprises two symmetrical fusion device main shells 1, the outer walls of the two fusion device main shells 1 are provided with a plurality of first cone spikes 11, the front and rear ends of the two fusion device main shells 1 are each provided with two limiting holes 12, the front and rear ends of the two fusion device main shells 1 are each provided with two first notches 13, the front and rear end centers of the two fusion device main shells 1 are each provided with a second notch 14, and the plurality of first notches 13 are respectively located at the bottom of the corresponding limiting holes 12, the two fusion device main shells 1 are both made of polymer material and are deformable, and when implanted in a regular space between vertebrae, the two fusion device main shells 1 are implanted The two intervertebral bodies are supported simultaneously by the first supporting mechanism 4 and the second supporting mechanism 5, so that the two fusion device main shells 1 are fitted with the inner wall of the vertebral body and clamped by multiple first cone spikes 11. When implanted into the intervertebral body with irregular space, according to the contact surface of the two vertebral bodies, one side of the two fusion device main shells 1 can be first opened, and the left side close to the two second notches 14 can be slowly opened. The two second notches 14 are dividing points, so that the two fusion device main shells 1 are opened into an inclined surface to fit with different vertebral bodies. It has strong functionality and can be adjusted according to the size of the intervertebral space to meet different needs without replacing the entire fusion device.

[0027] like Figure 1-Figure 10 As shown, a fusion device sub-shell 2 is provided on one side of the two fusion device main shells 1, and a connecting frame 21 is fixedly connected to the front and rear ends of one side of the fusion device sub-shell 2, and a fixing plate 22 is fixedly connected to the other side between the two connecting frames 21. A movable groove 23 is provided in the center of the fusion device sub-shell 2, and a rectangular groove 24 is provided at the top and bottom of the fusion device sub-shell 2. A plurality of clamping grooves 25 are provided on the inner wall of the fusion device sub-shell 2 near the movable groove 23. A limiting groove 26 is provided at the front and rear ends of one side of the fusion device sub-shell 2, and an axle seat 27 is fixedly connected to the inner center of the fixing plate 22. The fusion device sub-shell 2 is used for the installation of the fixing mechanism 3, the first supporting mechanism 4 and the second supporting mechanism 5. The movable groove 23 is used for the movement of the cam 302, the connecting ring 303, the movable plate 308, the push block 309 and the connecting plate 312. The plurality of clamping grooves 25 are used for the clamping of the clamping teeth 304, thereby locking the entire fixing mechanism 3, and the limiting groove 26 is used for the sliding of the movable plate 308 to achieve a limiting effect.

[0028] like Figure 1-Figure 10As shown, a fixing mechanism 3 is installed in the fusion device sub-shell 2, and the fixing mechanism 3 includes a connecting sleeve 301 rotatably connected to one side of the center of the fusion device sub-shell 2, one end of the connecting sleeve 301 is fixedly connected to a cam 302, one end of the cam 302 is fixedly connected to a connecting ring 303, one end of the connecting ring 303 is fixedly connected to a plurality of annularly distributed latch teeth 304 on the outside, one end of the connecting ring 303 is fixedly connected to a plurality of annularly distributed fixing blocks 305 on the outside, a plurality of fixing blocks 305 and corresponding latch teeth 304 are fixedly connected with springs 306, one end of the connecting ring 303 is fixedly connected to a first lock 307, and the cam 302 is fixedly connected to the first lock 307. The front and rear ends of the two movable plates 308 are both provided with push blocks 309 fixedly connected to the two movable plates 308, the two rectangular grooves 24 are both provided with support plates 310, the outer surfaces of the two support plates 310 are both fixedly connected with a plurality of second cone spikes 311, the front and rear ends of the inner surfaces of the two support plates 310 are both fixedly connected with connecting plates 312, and the front and rear ends of the movable grooves 23 are both fixedly connected with two limit seats 313. When the fusion device is implanted between two vertebrae, the first lock head 307 is first rotated by a tool so that the first lock head 307 drives the connecting ring 303 to rotate, so that the connecting ring 303 drives the cam 302 to rotate, so that the cam 302 drives The two movable plates 308 move, thereby driving the two push blocks 309 to move, so that the two push blocks 309 push the corresponding connecting plates 312, so that every two connecting plates 312 move toward the outer end, thereby driving the two support plates 310 to prop up outward, and clamping with the two vertebrae through multiple second cone spikes 311, which is convenient for the subsequent opening and clamping of the two fusion device sub-shells 2 to provide a fixing effect. The cam 302 and the connecting ring 303 are both located in the movable groove 23. In the combined state, the multiple locking teeth 304 are respectively engaged with the corresponding locking grooves 25. The rotation of the connecting ring 303 drives the multiple locking teeth 304 to rotate. When the two support plates 310 are clamped with the two vertebrae When tightened, multiple locking teeth 304 are engaged with corresponding locking grooves 25 to achieve reverse locking of the connecting ring 303, thereby reverse locking of the cam 302, and fixation of the two support plates 310. One end of the two movable plates 308 is slidably connected with the corresponding limiting grooves 26, and the two push blocks 309 are respectively fitted with one end of the corresponding connecting plate 312, and multiple connecting plates 312 are respectively slidably connected with the corresponding limiting seats 313. Since the contact surfaces of the two push blocks 309 and the corresponding connecting plates 312 are inclined surfaces, and the connecting plates 312 are limited by the limiting seats 313, when the push blocks 309 are pushed, the connecting plates 312 are pushed.

[0029] like Figure 1-Figure 11As shown, a first supporting mechanism 4 is installed in the center of the two fusion device main shells 1, and the first supporting mechanism 4 includes a fixing frame 401 fixedly connected between the two connecting frames 21, and the inner wall of the fixing frame 401 is rotatably connected with a rotating cylinder 402, and one end of the rotating cylinder 402 is fixedly connected with a second locking head 403, and the outer wall center of the rotating cylinder 402 is provided with a first thread 404, and the rotating cylinder 402 is threadedly connected with a first supporting block 405 through the first thread 404, and the front and rear end tops and bottoms of the first supporting block 405 are fixedly connected with two first limiting pins 406 and two second limiting pins 407. When it is necessary to open the two fusion device auxiliary shells 2, the second locking head 403 is rotated by a tool, so that the second locking head 403 drives the rotating cylinder 402 to rotate, thereby driving the first supporting block 405 to move, thereby driving multiple first limiting pins 406 and multiple second limiting pins 407 to move, and under the limitation of the corresponding limiting holes 12, the two fusion device auxiliary shells 2 are slowly opened, so as to be slowly clamped between the two vertebral bodies.

[0030] like Figure 1-Figure 11 As shown, a second supporting mechanism 5 is installed in the first supporting mechanism 4, and the second supporting mechanism 5 includes a rotating shaft 501 rotatably connected to the inner wall of the rotating cylinder 402, one end of the rotating shaft 501 is fixedly connected to a third locking head 502, the outer wall of the rotating shaft 501 is provided with a second thread 503, the rotating shaft 501 is threadedly connected to a second supporting block 504 through the second thread 503, and the front and rear end tops and bottoms of the second supporting block 504 are fixedly connected with two third limiting pins 505 and two fourth limiting pins 506. The third locking head 502 is rotated by a tool so that the third locking head 502 drives the rotating shaft 501 to rotate, thereby driving the second supporting block 504 to move, thereby driving multiple third limiting pins 505 and multiple fourth limiting pins 506 to move, and under the limit of the corresponding limiting hole 12 , so that the two fusion device sub-shells 2 are slowly expanded, and thus slowly clamped between the two vertebrae, one end of the outer wall of the rotating cylinder 402 is rotatably connected to the inner wall of the connecting sleeve 301, and multiple first limiting pins 406 and multiple third limiting pins 505 are respectively slidably connected to the corresponding limiting holes 12, and multiple second limiting pins 407 and multiple fourth limiting pins 506 are respectively located in the corresponding first notches 13. When the first support block 405 and the second support block 504 move, the corresponding second limiting pin 407 is driven to move in the corresponding first notch 13, so that the two fusion device sub-shells 2 are slowly expanded. The expansion range of the two fusion device sub-shells 2 can be adjusted according to the size of the space between the two vertebrae of the patient, and a large range on one side and a small range on the other side can be achieved to meet different needs and have strong functionality.

[0031] The working principle of this embodiment is as follows. When the fusion device is implanted between two vertebrae, the first locking head 307 is first rotated by a tool so that the first locking head 307 drives the connecting ring 303 to rotate, so that the connecting ring 303 drives the cam 302 to rotate, so that the cam 302 drives the two movable plates 308 to move, thereby driving the two push blocks 309 to move, so that the two push blocks 309 push the corresponding connecting plates 312, so that every two connecting plates 312 move toward the outer ends, thereby driving the two support plates 310 to prop up outward, and clamping with the two vertebral bodies through the multiple second cone spikes 311, and at the same time, the connecting ring 303 rotates to drive the multiple locking teeth 304 to rotate, so that the multiple locking teeth 304 fit with the corresponding locking grooves 25, thereby realizing the reverse locking of the connecting ring 303, thereby realizing the reverse locking of the cam 302, and realizing the fixation of the two support plates 310; When the space between the two vertebrae is regular, firstly, the third locking head 502 is rotated by a tool, so that the third locking head 502 drives the rotating shaft 501 to rotate, thereby driving the second support block 504 to move, thereby driving the plurality of third limiting pins 505 and the plurality of fourth limiting pins 506 to move, and under the limitation of the corresponding limiting holes 12, the two fusion device sub-shells 2 are slowly spread apart. Similarly, the second locking head 403 is rotated by a tool, so that the second locking head 403 drives the rotating cylinder 402 to rotate, thereby driving the first support block 405 to move, thereby driving the plurality of first limiting pins 406 and the plurality of second limiting pins 407 to move, and under the limitation of the corresponding limiting holes 12, the two fusion device sub-shells 2 are slowly spread apart, so that the spreading amplitudes on both sides of the two fusion device sub-shells 2 are roughly the same, and are clamped with the vertebrae through the plurality of first cone spikes 11; When the space between the two vertebrae is irregular, it is necessary to adaptively adjust the expansion amplitude of the first supporting mechanism 4 and the second supporting mechanism 5 according to the size of the space. Since the two fusion device sub-shells 2 are made of polymer material and the two second notches 14 are dividing points, the two fusion device sub-shells 2 can have a larger amplitude on one side and a smaller amplitude on the other side, or a larger amplitude on the other side and a smaller amplitude on the other side. Both can fit with the contact surfaces of vertebrae with different curvatures to achieve implant fusion.

[0032] 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 combined intervertebral fusion cage, comprising two symmetrical fusion cage main shells (1), characterized in that: A fusion device auxiliary shell (2) is provided on one side of the two fusion device main shells (1); A fixing mechanism (3) is installed in the fusion device auxiliary shell (2), a first supporting mechanism (4) is installed in the center of the two fusion device main shells (1), and a second supporting mechanism (5) is installed in the first supporting mechanism (4).

2. The minimally invasive combined intervertebral fusion cage according to claim 1, characterized in that: The outer walls of the two fusion device main shells (1) are provided with a plurality of first cone spikes (11); the front and rear ends of the two fusion device main shells (1) are each provided with two limiting holes (12); the front and rear ends of the two fusion device main shells (1) are each provided with two first notches (13); the centers of the front and rear ends of the two fusion device main shells (1) are each provided with a second notch (14); and the plurality of first notches (13) are respectively located at the bottoms of the corresponding limiting holes (12).

3. The minimally invasive combined intervertebral fusion cage according to claim 2, characterized in that: The front and rear ends of one side of the fusion device sub-shell (2) are fixedly connected to a connecting frame (21), the other side between the two connecting frames (21) is fixedly connected to a fixing plate (22), a movable groove (23) is provided at the center of the fusion device sub-shell (2), the top and bottom of the fusion device sub-shell (2) are provided with rectangular grooves (24), a plurality of slots (25) are provided on the inner wall of the fusion device sub-shell (2) near the movable groove (23), the front and rear ends of one side of the fusion device sub-shell (2) are provided with limiting grooves (26), and the inner center of the fixing plate (22) is fixedly connected to an axle seat (27).

4. The minimally invasive combined intervertebral fusion cage according to claim 3, characterized in that: The fixing mechanism (3) comprises a connecting sleeve (301) rotatably connected to one side of the center of the fusion device sub-shell (2); one end of the connecting sleeve (301) is fixedly connected to a cam (302); one end of the cam (302) is fixedly connected to a connecting ring (303); one end of the connecting ring (303) is fixedly connected to the outer side of a plurality of annularly distributed latching teeth (304); one end of the connecting ring (303) is fixedly connected to the outer side of a plurality of annularly distributed fixing blocks (305); a spring (306) is fixedly connected between the plurality of fixing blocks (305) and the corresponding latching teeth (304); One end of the connecting ring (303) is fixedly connected to a first lock head (307), the front and rear ends of the cam (302) are both provided with movable plates (308), the two movable plates (308) are both fixedly connected to push blocks (309), the two rectangular grooves (24) are both provided with support plates (310), the outer surfaces of the two support plates (310) are both fixedly connected to a plurality of second cone spikes (311), the front and rear ends of the inner surfaces of the two support plates (310) are both fixedly connected to connecting plates (312), and the front and rear ends of the movable groove (23) are both fixedly connected to two limit seats (313).

5. The minimally invasive combined intervertebral fusion cage according to claim 4, characterized in that: The cam (302) and the connecting ring (303) are both located in the movable groove (23); in the assembled state, the plurality of latching teeth (304) are respectively latched with the corresponding latching grooves (25).

6. The minimally invasive combined intervertebral fusion cage according to claim 4, characterized in that: One end of the two movable plates (308) is slidably connected to the corresponding limiting groove (26), the two push blocks (309) are respectively fitted to one end of the corresponding connecting plate (312), and the plurality of connecting plates (312) are respectively slidably connected to the corresponding limiting seats (313).

7. The minimally invasive combined intervertebral fusion cage according to claim 4, characterized in that: The first supporting mechanism (4) comprises a fixing frame (401) fixedly connected between the two connecting frames (21); a rotating cylinder (402) is rotatably connected to the inner wall of the fixing frame (401); a second locking head (403) is fixedly connected to one end of the rotating cylinder (402); a first thread (404) is provided at the center of the outer wall of the rotating cylinder (402); the rotating cylinder (402) is threadedly connected to a first supporting block (405) via the first thread (404); and two first limiting pins (406) and two second limiting pins (407) are fixedly connected to the top and bottom of the front and rear ends of the first supporting block (405).

8. The minimally invasive combined intervertebral fusion cage according to claim 7, characterized in that: The second supporting mechanism (5) comprises a rotating shaft (501) rotatably connected to the inner wall of the rotating cylinder (402); one end of the rotating shaft (501) is fixedly connected to a third locking head (502); an outer wall of the rotating shaft (501) is provided with a second thread (503); the rotating shaft (501) is threadably connected to a second supporting block (504) via the second thread (503); and the top and bottom of the front and rear ends of the second supporting block (504) are fixedly connected to two third limiting pins (505) and two fourth limiting pins (506).

9. The minimally invasive combined intervertebral fusion cage according to claim 8, characterized in that: One end of the outer wall of the rotating drum (402) is rotatably connected to the inner wall of the connecting sleeve (301); the plurality of first limiting pins (406) and the plurality of third limiting pins (505) are respectively slidably connected to the corresponding limiting holes (12); and the plurality of second limiting pins (407) and the plurality of fourth limiting pins (506) are respectively located in the corresponding first notches (13).

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