An automatic upward-moving plate internal fixation device applicable to minimally invasive spinal surgery

Abstract

The present invention relates to an automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, which includes a machine head connecting seat. An XY two-way adjustment mechanism and an X-direction adjustment mechanism are respectively arranged on the machine head connecting seat. A main eccentric steel plate clamping device is arranged on the XY two-way adjustment mechanism, and a secondary eccentric steel plate clamping device is arranged on the X-direction adjustment mechanism. The main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed, and a matching structure is distributed between the main steel plate and the secondary steel plate. Thus, two-way adjustment in the X and Y directions can be achieved, enabling the main and secondary steel plates to fit more closely to the bone. The two steel plate clamps are of eccentric structure, which is beneficial for delivering the steel plate along the subcutaneous tunnel to an ideal position. The upward-moving screw assembly is composed of an external thread sleeve and an ordinary screw. Screwing the external thread sleeve into the threaded positioning hole of the steel plate can drive the steel plate and the spinous process to move upward by a certain height and be firmly fixed. The overall structure is relatively simple, easy to manufacture, and the use and implementation are also relatively convenient.

Description

Technical Field

[0001] The present invention relates to an internal fixation device for steel plates, and particularly to an automatically upwardly movable internal fixation device for steel plates suitable for minimally invasive spinal surgery. Background Art

[0002] In recent years, some major progress has been made in the field of spinal surgery, and revolutionary changes will occur in the surgical treatment methods for lumbar disc herniation: the mode mainly using "resection" of the herniated intervertebral disc will enter the mode mainly using "preservation" of the herniated intervertebral disc to allow it to absorb naturally. Literature reports that artificial spinal double-opening expansionplasty (CMEL) can widely "induce" the phenomenon of natural absorption (RHNP) of the herniated intervertebral disc, with an absorption ratio of up to 81.3%, and the maximum absorption rate can reach 100%. However, the artificial method has problems such as a relatively large incision and cumbersome surgical operations, especially the installation of traditional steel plates.

[0003] Specifically, the common problems are as follows: 1. Installation at multiple angles is required, and often skin auxiliary incisions need to be made. 2. Fixation with two or more screws is required, etc., which affects the popularization and application of this new technology. At present, although some spinal surgery robots have been successfully applied clinically, including the Mazor Spinal Assistant Robot in Israel, the SPINEBOT Spinal Robot in South Korea, the Mazor X Spinal Surgery Robot in the United States, and the Tianji Spinal Surgery Robot in China, etc., they basically use the method of registering intraoperative X-ray images with preoperative CT images for positioning, and can only be used for pedicle screw implantation, with very single functions.

[0004] To "induce" the widespread natural absorption (RHNP) of the herniated intervertebral disc, for a spinal minimally invasive surgery robot, to complete the CMEL surgical procedure and achieve double-opening decompression and posterior displacement and expansion of the spinal canal, it must be completed through a relatively small skin incision and in a narrow space, namely, the subcutaneous tunnel. However, currently, there is no internal fixation steel device that can cooperate with a spinal minimally invasive surgery robot to achieve the upward movement of the spinous ligament complex and be installed through the subcutaneous tunnel.

[0005] In view of the above-mentioned defects, the present inventor actively conducts research and innovation in order to create an automatically upwardly movable internal fixation device for steel plates suitable for minimally invasive spinal surgery, making it more valuable in industrial applications. Summary of the Invention

[0006] To solve the above technical problems, the object of the present invention is to provide an automatically upwardly movable internal fixation device for steel plates suitable for minimally invasive spinal surgery.

[0007] An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery of the present invention includes a machine head connecting seat, wherein: an XY two-way adjustment mechanism and an X-direction adjustment mechanism are respectively arranged on the machine head connecting seat, a main eccentric steel plate clamping device is arranged on the XY two-way adjustment mechanism, a secondary eccentric steel plate clamping device is arranged on the X-direction adjustment mechanism, the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed, the XY two-way adjustment mechanism is a U-shaped block, side horizontal grooves are mirror-symmetrically distributed on both sides of the machine head connecting seat, the extending ends on both sides of the U-shaped block are inserted into the side horizontal grooves, a top horizontal groove is opened at the upper end of the machine head connecting seat, Y-direction adjustment screws are arranged in the top horizontal grooves, the Y-direction adjustment screws are connected to the top of the U-shaped block, an X-direction adjustment screw is connected to the U-shaped block, a main adjustment nut is arranged on the X-direction adjustment screw, the main adjustment nut is connected to the upper end of the main eccentric steel plate clamp, a main steel plate is arranged on the main eccentric steel plate clamping device, a secondary steel plate is arranged on the secondary eccentric steel plate clamping device, and a matching structure is distributed between the main steel plate and the secondary steel plate; positioning holes are arranged on both the main steel plate and the secondary steel plate, and upward-moving screw assemblies are connected to the positioning holes through external thread sleeves.

[0008] Further, for the above-mentioned automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, wherein the X-direction adjustment mechanism includes a guiding seat arranged outside the machine head connecting seat, paired guiding rods are arranged on the guiding seat, an X-direction adjustment screw is arranged on one side of the guiding seat, the guiding rods are connected to the secondary eccentric steel plate clamping device, a secondary adjustment nut is arranged at the upper end of the secondary eccentric steel plate clamping device, and one side of the secondary eccentric steel plate clamping device is in contact with the X-direction adjustment screw.

[0009] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, wherein both the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device include a lower L-shaped rod, the lower L-shaped rod is connected to an upper L-shaped rod through a fastening screw, a guiding through hole is arranged at the upper end of the lower L-shaped rod, a convex platform is arranged at the lower end of the lower L-shaped rod, a corresponding main steel plate or secondary steel plate is connected to the convex platform, fixing holes are arranged on both the main steel plate and the secondary steel plate, and the convex platform is embedded in the fixing hole.

[0010] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, wherein the outer shapes of both the main steel plate and the secondary steel plate are in an arc structure, and a matching structure is distributed on the inner sides of the main steel plate and the secondary steel plate.

[0011] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, wherein the inner shapes of both the main steel plate and the secondary steel plate are adapted to the outer shape of the spinous process surface.

[0012] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device applicable to minimally invasive spinal surgery, the matching structure includes a pin column arranged on the inner side surface of the main steel plate and a fixing tube arranged at the corresponding position on the inner side of the auxiliary steel plate. When the main steel plate and the auxiliary steel plate are combined, the pin column is inserted into the fixing tube.

[0013] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device applicable to minimally invasive spinal surgery, the matching structure includes a pin arranged on the auxiliary steel plate and a pin hole arranged at the corresponding position on the main steel plate. When the main steel plate and the auxiliary steel plate are combined, the pin is inserted into the pin hole.

[0014] Furthermore, for the above-mentioned automatic upward-moving steel plate internal fixation device applicable to minimally invasive spinal surgery, the matching structure includes a positioning hook arranged on the inner side surface of the main steel plate and a positioning hook arranged on the inner side of the auxiliary steel plate.

[0015] Still further, for the above-mentioned automatic upward-moving steel plate internal fixation device applicable to minimally invasive spinal surgery, one side of the head connecting seat is connected with a head fixing seat through a connecting bolt.

[0016] By means of the above solution, the present invention has at least the following advantages:

[0017] 1. Through the cooperation of multiple adjustment structures, X and Y bidirectional adjustment can be achieved, making the two steel plates more conformable to the bone.

[0018] 2. The two steel plate clamps are of eccentric structure, which is beneficial to delivering the steel plate along the subcutaneous tunnel to the ideal position.

[0019] 3. Through the inner shapes of the main steel plate and the auxiliary steel plate adapting to the surface shape of the spinous process and the matching structure between the main and auxiliary steel plates, appropriate blocking is achieved, which can prevent the spinous process ligament complex from shifting into the spinal canal and ensure safe use.

[0020] 4. Through the mutual cooperation of the external thread sleeve and the upward-moving screw assembly, when the external thread sleeve is screwed into the positioning hole to the lowest position, the main steel plate, the auxiliary steel plate and the spinous process ligament complex can be driven to move upward together and be reliably fixed.

[0021] 5. The overall structure is simple and can be used in cooperation with various conventional minimally invasive spinal surgery robots.

[0022] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the attached drawings to describe in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the use of the present invention (adopting a pin-tube tight fit).

[0024] Figure 2 It is a schematic top view structure diagram of the present invention.

[0025] Figure 3 It is a schematic diagram of the use of the present invention.

[0026] Figure 4 It is a schematic structure diagram of a secondary eccentric type steel plate clamp device.

[0027] Figure 5 It is a schematic diagram of the combination using a pin.

[0028] Figure 6 It is a schematic diagram of the combination using a positioning hook.

[0029] The meanings of the reference numerals in the figures are as follows.

[0030] 1 Head connecting seat 2 Main eccentric type steel plate clamp device

[0031] 3 Secondary eccentric type steel plate clamp device 4 U-shaped block

[0032] 5 Side horizontal groove 6 Top horizontal groove

[0033] 7 Y-direction adjustment screw 8 X-direction adjustment screw

[0034] 9 Main adjustment nut 10 Main steel plate

[0035] 11 Guide seat 12 Guide rod

[0036] 13 X-direction adjustment screw 14 Secondary adjustment nut

[0037] 15 Lower L-shaped rod 16 Fastening screw

[0038] 17 Upper L-shaped rod 18 Boss

[0039] 19 Positioning hook 20 External thread sleeve

[0040] 21 Upward movement screw assembly 22 Spine

[0041] 23 Connecting bolt 24 Head fixing seat

[0042] 25 Guide perforation 26 Secondary steel plate

[0043] 27 Pin column 28 Fixed tube Specific embodiments

[0044] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0045] Such as Figures 1 to 5 The snap - type steel plate internal fixation device for minimally invasive spinal surgery, including a machine head connecting seat 1, is characterized in that: an XY two - way adjustment mechanism and an X - direction adjustment mechanism are respectively arranged on the machine head connecting seat 1, so that precise two - way adjustment in the X and Y directions can be realized under the control of a surgical robot. At the same time, in order to limit the bone, a main eccentric steel plate clamping device 2 is arranged on the XY two - way adjustment mechanism, and a secondary eccentric steel plate clamping device 3 is arranged on the X - direction adjustment mechanism. Moreover, in order to fit the contour curve of the human vertebra and realize the clamping and positioning of two steel plates, the main eccentric steel plate clamping device 2 and the secondary eccentric steel plate clamping device 3 are symmetrically distributed.

[0046] In combination with the actual implementation, in order to facilitate precise two - way adjustment, the XY two - way adjustment mechanism is a U - shaped block 4. Specifically, on both sides of the machine head connecting seat 1 adopted in the present invention, side horizontal grooves 5 are mirror - symmetrically distributed. The two extended ends of the U - shaped block 4 are inserted into the side horizontal grooves 5, which can realize effective movement adjustment while meeting the limit. At the same time, a top horizontal groove 6 is opened at the upper end of the machine head connecting seat 1, and Y - direction adjustment screws 7 are arranged in the top horizontal groove 6. The Y - direction adjustment screws 7 are connected to the top of the U - shaped block 4. In this way, the locking of the Y - direction movement can be realized, meeting the free adjustment and positioning of the used devices. And, an X - direction adjustment screw 13 is connected to the U - shaped block 4, and a main adjustment nut 9 is arranged on the X - direction adjustment screw 13. The main adjustment nut 9 is connected to the upper end of the main eccentric steel plate clamp. Furthermore, in order to meet the subsequent snap - type connection and positioning, a main steel plate 10 is arranged on the main eccentric steel plate clamping device 2, a secondary steel plate 26 is arranged on the secondary eccentric steel plate clamping device 3, and a matching structure is distributed between the main steel plate 10 and the secondary steel plate 26. Considering the realization of the automatic "upward movement" function, threaded positioning holes are arranged on both the main steel plate 10 and the secondary steel plate 26. The threaded positioning holes are connected with an upward movement screw assembly 21 through an external thread sleeve 20. In this way, during use, when the two external thread sleeves 20 are screwed into the corresponding threaded positioning holes of the main steel plate 10 and the secondary steel plate 26 to the lowest position, the external thread sleeves 20 can drive the main steel plate 10, the secondary steel plate 26 and the spinous process 22 to move upward together and be reliably fixed.

[0047] In combination with a preferred embodiment of the present invention, the adopted X - direction adjustment mechanism includes a guiding seat 11 arranged outside the machine head connecting seat 1. A pair of guide rods 12 are arranged on the guiding seat 11, so that the X - direction movement can be guided. Considering the need for adjustment and limit, an X - direction adjustment screw 13 is arranged on one side of the guiding seat. Specifically, the guide rods 12 are connected to the secondary eccentric steel plate clamping device 3, and a secondary adjustment nut 14 is arranged at the upper end of the secondary eccentric steel plate clamping device 3, which is convenient for adjustment. At the same time, considering the convenience of limit adjustment, one side of the secondary eccentric steel plate clamping device 3 is in contact with the X - direction adjustment screw 13.

[0048] Furthermore, both the main eccentric steel plate clip device 2 and the auxiliary eccentric steel plate clip device 3 include a lower L-shaped rod 15, and the lower L-shaped rod 15 is connected to an upper L-shaped rod 17 by a fastening screw 16. At the same time, a guiding perforation 25 is provided at the upper end of the lower L-shaped rod 15. In this way, when assembling, the guiding rod 12 is connected into the guiding perforation 25. And, a convex platform 18 is provided at the lower end of the lower L-shaped rod 15, and a corresponding main steel plate 10 or auxiliary steel plate 26 is connected to the convex platform 18. Considering the temporary positioning of the steel plate, fixing holes are provided on the main steel plate 10 and the auxiliary steel plate 26, and the convex platform 18 is embedded in the fixing holes. After assembly, the fastening screw 16 can tightly squeeze the upper L-shaped rod 17 and the lower L-shaped rod 15. Through the distribution of the paired main eccentric steel plate clip devices 2 and auxiliary eccentric steel plate clips, the main steel plate 10 and the auxiliary steel plate 26 can be delivered to the ideal position along the subcutaneous tunnel together.

[0049] In combination with the actual implementation, the inner shapes of the main steel plate 10 and the auxiliary steel plate 26 adopted in the present invention are adapted to the outer shape of the spinous process surface. The conventional spinous process 22 has a double V-shaped structure with a smaller upper part and a larger lower part, and a larger upper end bifurcation. During implementation, the two steel plates can firmly "hold" the spinous process 22 from all directions of up and down, left and right, head and tail.

[0050] Furthermore, the adopted matching structure includes a pin column 27 provided on the inner side surface of the main steel plate 10, and a fixed tube 28 provided at the corresponding position on the inner side of the auxiliary steel plate 26. In this way, when the main steel plate 10 and the auxiliary steel plate 26 move in the "closing" direction along the Y-axis, the pin column 27 is inserted into the fixed tube 28, making the two steel plates firmly combined. At the same time, the present invention also provides a relatively simple matching structure, which includes a pin 29 provided on the auxiliary steel plate 26 and a pin hole provided at the corresponding position on the main steel plate 10. When the main steel plate 10 and the auxiliary steel plate 26 are combined, the pin 29 is inserted into the pin hole. During manufacturing, the diameter of the pin 29 is matched with the aperture of the pin hole to avoid loosening after combination. The present invention also provides a simpler non-connection structure. There is a positioning hook 19 on one side of the main steel plate 10 and the auxiliary steel plate 26, which firmly "holds" and reinforces from one side of the spinous process 22.

[0051] Moreover, considering a more convenient connection with the surgical robot, which can achieve convenient replacement and maintenance, and is also convenient for threading a sterile isolation protective cover, one side of the head connecting seat 1 is connected to a head fixing seat 24 by a connecting bolt 23. Of course, for different structures or implementation methods, screws, connecting rods, magnetic attraction, etc. can also be used. Any structure that can achieve the combination of the head connecting seat 1 and the head fixing seat 24 can be adopted, which will not be elaborated here.

[0052] Embodiment 1

[0053] The pin post 27 on the inner side of the main steel plate 10 and the fixed tube 28 arranged at the corresponding position on the inner side of the auxiliary steel plate 26. In this way, when the main steel plate 10 and the auxiliary steel plate 26 move "together" along the Y-axis direction, the pin post 27 is inserted into the fixed tube 28, making the two steel plates firmly combined. During use, when the two external thread sleeves 20 are screwed into the corresponding thread positioning holes of the corresponding main steel plate 10 and auxiliary steel plate 26 to the lowest position, the external thread sleeves 20 can drive the main steel plate 10, the auxiliary steel plate 26 and the spinous process 22 to move upward together and be reliably fixed.

[0054] Embodiment 2

[0055] The pin 29 on the auxiliary steel plate 26 and the pin hole arranged at the corresponding position of the main steel plate 10. When the main steel plate 10 and the auxiliary steel plate 26 are combined, the pin 29 is inserted into the pin hole. During use, when the two external thread sleeves 20 are screwed into the corresponding thread positioning holes of the corresponding main steel plate 10 and auxiliary steel plate 26 to the lowest position, the external thread sleeves 20 can drive the main steel plate 10, the auxiliary steel plate 26 and the spinous process 22 to move upward together and be reliably fixed.

[0056] Embodiment 3

[0057] Positioning hooks 19 are arranged on the inner sides of both the main steel plate 10 and the auxiliary steel plate 26. The main steel plate 10 and the auxiliary steel plate 26 are respectively close to the spinous process 22, and the spinous process 22 is "held" by the positioning hooks on the corresponding two sides to achieve tight positioning. During use, when the two external thread sleeves 20 are screwed into the corresponding thread positioning holes of the corresponding main steel plate 10 and auxiliary steel plate 26 to the lowest position, the external thread sleeves 20 can drive the main steel plate 10, the auxiliary steel plate 26 and the spinous process 22 to move upward together and be reliably fixed.

[0058] It can be seen from the above text description and in combination with the attached drawings that after adopting the present invention, the following advantages are possessed:

[0059] 1. Through the cooperation of multiple adjustment structures, two-way adjustment in the X and Y directions can be achieved, making the two steel plates more conformable to the bone.

[0060] 2. The two steel plate clamps are of an eccentric structure, which is beneficial to delivering the steel plate along the subcutaneous tunnel to the ideal position.

[0061] 3. Through the mutual adaptation of the inner shapes of the main steel plate and the auxiliary steel plate to the surface shape of the spinous process and the cooperation structure between the main and auxiliary steel plates, appropriate blocking is achieved, which can prevent the spinous process ligament complex from shifting into the spinal canal and ensure the safety of use.

[0062] 4. Through the mutual cooperation of the external thread sleeve and the upward movement screw assembly, when the external thread sleeve is screwed into the positioning hole to the lowest position, the main steel plate, the auxiliary steel plate and the spinous process ligament complex can be driven to move upward together and be reliably fixed.

[0063] 5. The overall structure is simple and can be used in cooperation with various conventional spinal minimally invasive surgical robots.

[0064] In addition, the orientation or positional relationship described in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0065] The terms "main" and "subsidiary" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "main" and "subsidiary" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise specifically defined.

[0066] Similarly, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0067] In the present invention, unless otherwise clearly defined and limited, terms such as "connected" and "arranged" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. And it can be directly on another component or indirectly on that another component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0068] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery, including a machine head connecting seat, Characterized in that: An XY two-way adjustment mechanism and an X-direction adjustment mechanism are respectively arranged on the machine head connecting seat. A main eccentric steel plate clamping device is arranged on the XY two-way adjustment mechanism, and a secondary eccentric steel plate clamping device is arranged on the X-direction adjustment mechanism. The main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device are symmetrically distributed. The XY two-way adjustment mechanism is a U-shaped block. Side horizontal grooves are mirror-symmetrically distributed on both sides of the machine head connecting seat. The two extending ends of the U-shaped block are inserted into the side horizontal grooves. A top horizontal groove is opened at the upper end of the machine head connecting seat. Y-direction adjustment screws are arranged in the top horizontal grooves. The Y-direction adjustment screws are connected to the top of the U-shaped block. An X-direction adjustment screw is connected to the U-shaped block. A main adjustment nut is arranged on the X-direction adjustment screw. The main adjustment nut is connected to the upper end of the main eccentric steel plate clamp. A main steel plate is arranged on the main eccentric steel plate clamping device, and a secondary steel plate is arranged on the secondary eccentric steel plate clamping device. A matching structure is distributed between the main steel plate and the secondary steel plate; Thread positioning holes are arranged on both the main steel plate and the secondary steel plate. The thread positioning holes are connected with upward-moving screw assemblies through external thread sleeves.

2. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery according to claim 1, Characterized in that: The X-direction adjustment mechanism includes a guiding seat arranged outside the machine head connecting seat. A pair of distributed guiding rods are arranged on the guiding seat. An X-direction adjustment screw is arranged on one side of the guiding seat. The guiding rods are connected to the secondary eccentric steel plate clamping device. A secondary adjustment nut is arranged at the upper end of the secondary eccentric steel plate clamping device. One side of the secondary eccentric steel plate clamping device is in contact with the X-direction adjustment screw.

3. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery according to claim 1, Characterized in that: Both the main eccentric steel plate clamping device and the secondary eccentric steel plate clamping device include a lower L-shaped rod. The lower L-shaped rod is connected to an upper L-shaped rod through a fastening screw. A guiding perforation is arranged at the upper end of the lower L-shaped rod. A convex platform is arranged at the lower end of the lower L-shaped rod. The corresponding main steel plate or secondary steel plate is connected to the convex platform. Fixing holes are arranged on the main steel plate and the secondary steel plate. The convex platform is embedded in the fixing hole.

4. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery according to claim 1, Characterized in that: The outer shapes of the main steel plate and the secondary steel plate are in a curved arc structure. A matching structure is distributed on the inner sides of the main steel plate and the secondary steel plate.

5. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery according to claim 1, Characterized in that: The inner shapes of the main steel plate and the secondary steel plate are adapted to the outer shape of the spinous process surface.

6. An automatic upward-moving steel plate internal fixation device suitable for minimally invasive spinal surgery according to claim 1, Characterized in that: The mating structure includes pin columns provided on the inner side surface of the main steel plate and fixed tubes provided at corresponding positions on the inner side of the secondary steel plate. When the main steel plate and the secondary steel plate are combined, the pin columns are inserted into the fixed tubes.

7. An automatically upwardly movable steel plate internal fixation device applicable to minimally invasive spinal surgery according to claim 1, characterized in that: the mating structure includes pins provided on the secondary steel plate and pin holes provided at corresponding positions on the main steel plate. When the main steel plate and the secondary steel plate are combined, the pins are inserted into the pin holes.

8. An automatically upwardly movable steel plate internal fixation device applicable to minimally invasive spinal surgery according to claim 1, characterized in that: the mating structure includes positioning hooks provided on the inner side surface of the main steel plate and positioning hooks provided on the inner side of the secondary steel plate.

9. An automatically upwardly movable steel plate internal fixation device applicable to minimally invasive spinal surgery according to claim 1, characterized in that: one side of the machine head connecting seat is connected to a machine head fixing seat through a connecting bolt.

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