Spinal fusion device

Abstract

This application relates to a spinal fusion device, comprising a first support plate, a second support plate, and an adjustment device. Two first support plates are arranged along a first direction; a second support plate is spaced apart from the first support plates along a second direction; the adjustment device is connected to the first and second support plates; and when operated, the adjustment device allows the two first support plates to move closer or further apart in the first direction, while simultaneously causing the second support plate to move closer or further apart from the first support plate in the second direction. When the spinal fusion device needs to be implanted into a patient's spine, it can be adjusted to a retracted state, minimizing its size and reducing the required incision, thus facilitating implantation and improving wound healing speed. Furthermore, when implanted into the spine, the spinal fusion device expands in both its height and width directions, providing a larger support area for the spine and improving the patient's treatment outcome.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to spinal fusion devices. Background Technology

[0002] Spinal fusion devices are widely used as medical devices for treating spinal diseases. However, implantation of a spinal fusion device requires a large incision in the spine. This results in a larger wound for the patient during the surgery, leading to a slower recovery. Furthermore, the device itself has poor stability once implanted, resulting in a less effective treatment outcome. Summary of the Invention

[0003] Therefore, it is necessary to provide a spinal fusion device that addresses the technical problems of causing large wounds to patients during spinal fusion, resulting in slow recovery, and having poor stability when implanted into the spine, thus leading to poor treatment outcomes.

[0004] A spinal fusion device comprising:

[0005] The first support plate, there are two first support plates, and the two first support plates are arranged along the first direction;

[0006] The second support plate is provided at a distance from the first support plate along a second direction, and the second direction is at an angle to the first direction.

[0007] An adjustment device is connected to the first support plate and the second support plate. When the adjustment device is operated, it can cause the two first support plates to move closer or further apart in the first direction, while simultaneously causing the second support plate to move closer or further apart from the first support plate in the second direction.

[0008] In one embodiment, the adjusting device includes an adjusting member, a moving component, and a sliding rod assembly;

[0009] The adjusting component is slidably connected to the first support plate;

[0010] The movable component is fixedly connected to the first support plate, and the movable component is slidably connected to the adjusting member, and the movable component is movably connected to the sliding rod assembly;

[0011] The side of the sliding rod assembly opposite to the moving assembly is slidably connected to the second support plate;

[0012] When the moving component slides relative to the adjusting member, it can drive the first support plate to move along the first direction, and at the same time drive one side of the sliding rod assembly to slide relative to the second support plate, so that the second support plate moves closer to or further away from the first support plate along the second direction.

[0013] In one embodiment, the moving component includes a first moving member and a second moving member; the first moving member is snapped into connection with the first support plate, and the second moving member passes through the adjusting member and abuts against the first moving member;

[0014] When the second moving member moves relative to the adjusting member in a third direction, it can drive the first moving member to move, so that the first moving member drives the first support plate to slide relative to the adjusting member and move in the first direction. At the same time, the sliding rod assembly slides relative to the second support plate, so that the second support plate moves closer to or further away from the first support plate in the second direction.

[0015] The third direction is set at an angle to the first direction and the second direction.

[0016] In one embodiment, the sliding rod assembly includes a first sliding rod and a second sliding rod that are rotatably connected to each other;

[0017] One end of the first sliding rod is connected to the first moving member, and the other end of the first sliding rod is slidably connected to the second support plate; one end of the second sliding rod is rotatably connected to the adjusting member, and the other end of the second sliding rod is slidably connected to the second support plate;

[0018] When the first moving member moves along the third direction, the ends of the first sliding rod and the second sliding rod on the same side in the second direction can move closer to or further away from each other.

[0019] In one embodiment, a first limiting groove and a second limiting groove are respectively constructed on both sides of the second support plate along the first direction;

[0020] A first limiting post protrudes from the side of the first sliding rod near the second support plate along the first direction, and the first limiting post is slidably disposed in the first limiting groove;

[0021] The second sliding rod has a second limiting post protruding along the first direction on the side near the second support plate, and the second limiting post is slidably disposed in the second limiting groove.

[0022] In one embodiment, the two first support plates are respectively provided with snap-fit ​​grooves arranged opposite each other along the first direction, and the two ends of the first moving member along the first direction are respectively snapped into the snap-fit ​​grooves.

[0023] In one embodiment, the adjusting member has a first inclined surface, and the first support plate has a second inclined surface, the first inclined surface and the second inclined surface cooperating to allow the first support plate to slide relative to the adjusting member.

[0024] In one embodiment, the adjusting member is further provided with a limiting boss, and the first support plate is provided with a limiting groove;

[0025] When the spinal fusion device is in the target position of the unfolded state, the limiting boss is engaged in the limiting groove.

[0026] In one embodiment, the adjusting member is configured with a first abutting surface, and the first support plate is configured with a second abutting surface; both the first abutting surface and the second abutting surface extend in a third direction.

[0027] When the spinal fusion device is in the target position in the unfolded state, the first abutment surface abuts against the second abutment surface.

[0028] In one embodiment, the spinal fusion device further includes a third limiting post, one end of which is fixedly connected to the first support plate;

[0029] The adjusting component is configured with a third limiting groove, and the other end of the third limiting post is slidably disposed in the third limiting groove;

[0030] When the first support plate slides relative to the adjusting member, the third limiting post slides within the third limiting groove.

[0031] In one embodiment, the sidewall of the first support plate along the first direction is the first sidewall, and the sidewall of the second support plate along the first direction is the second sidewall.

[0032] When the spinal fusion device is in the retracted state, the first sidewall and the second sidewall on the same side are on different planes;

[0033] When the spinal fusion device is in the target position in the deployed state, the first sidewall and the second sidewall on the same side are on the same plane.

[0034] When the aforementioned spinal fusion device needs to be implanted into a patient's spine, if it is necessary to adjust the device to a retracted state, the adjustment mechanism can be operated to bring the two first support plates closer together in the first direction and the second support plate closer together in the second direction. This adjusts the spinal fusion device to its minimum size, reducing the incision required for implantation, facilitating implantation, and improving wound healing speed. Conversely, when the spinal fusion device is implanted into the spine, the adjustment mechanism can be operated to move the two first support plates further apart in the first direction and the second support plate further apart in the second direction. This adjusts the spinal fusion device to an extended state, simultaneously expanding its dimensions in both the first and second directions. This means the spinal fusion device can expand in both its height and width, resulting in a larger overall size and a larger support area for the spine, leading to better spinal stability and improved treatment outcomes for the patient. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a spinal fusion device in a retracted state according to an embodiment of this application.

[0036] Figure 2 for Figure 1 A top view of the spinal fusion device shown.

[0037] Figure 3 for Figure 1 An exploded view of the spinal fusion device shown.

[0038] Figure 4 for Figure 1 The rear view of the spinal fusion device shown.

[0039] Figure 5 for Figure 1 Left view of the spinal fusion device shown.

[0040] Figure 6 for Figure 1 The diagram shows the first engagement of the first support plate and the first adjustment component in the spinal fusion device.

[0041] Figure 7 for Figure 1 The diagram shows the second engagement of the first support plate and the adjusting element in the spinal fusion device.

[0042] Figure 8 for Figure 1 A schematic diagram of the adjustment device in the spinal fusion device shown.

[0043] Figure 9 for Figure 1The diagram shows the target position of the spinal fusion device in its deployed state.

[0044] Figure 10 for Figure 9 A top view of the spinal fusion device shown.

[0045] Figure 11 for Figure 9 The rear view of the spinal fusion device shown.

[0046] Figure 12 for Figure 9 Left view of the spinal fusion device shown.

[0047] Figure 13 for Figure 9 The diagram shows the first engagement of the first support plate and the first adjustment component in the spinal fusion device.

[0048] Figure 14 for Figure 9 The diagram shows the second engagement of the first support plate and the adjusting element in the spinal fusion device.

[0049] Figure 15 for Figure 9 The diagram shows the interaction between the first support plate, the adjusting component, and the third limiting column in the spinal fusion device.

[0050] Figure 16 for Figure 9 A schematic diagram of the adjustment device in the spinal fusion device shown.

[0051] Figure 17 for Figure 9 The diagram shows the interaction between the sliding component and the second support plate in the spinal fusion device.

[0052] Figure 18 for Figure 1 A schematic diagram of the second support plate in the spinal fusion device shown.

[0053] Figure 19 for Figure 1 A first schematic diagram of the adjustment mechanism in the spinal fusion device shown.

[0054] Figure 20 for Figure 1 A second schematic diagram of the adjustment mechanism in the spinal fusion device shown.

[0055] Figure 21 for Figure 1 The diagram shows a spinal fusion device implanted in the spine.

[0056] Reference numerals: 100-First support plate; 110-Second inclined surface; 120-Limiting groove; 130-First side wall; 140-Snap-fit ​​groove; 150-Second abutment surface; 200-Second support plate; 210-First limiting groove; 220-Second limiting groove; 230-Second side wall; 300-Adjusting device; 310-Adjusting component; 311-First inclined surface; 312-Limiting boss; 313-Third limiting groove; 3131-First section; 3132-Second section; 314-Adjusting hole; 315-First abutment surface; 320-Moving component; 321-First moving component; 322-Second moving component; 330-Sliding rod assembly; 331-First sliding rod; 3311-First limiting post; 332-Second sliding rod; 3321-Second limiting post; 400-Third limiting post; 500-Spine. Detailed Implementation

[0057] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0058] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0063] A spinal fusion device is a medical device used to treat various causes of lumbar degenerative instability, including herniated discs, spinal stenosis, or lumbar spondylolisthesis. During treatment, the spinal fusion device needs to be relatively large to expand the patient's vertebral column to a sufficient height, allowing for better physiological structural restoration. However, due to the relatively fixed size and structure of traditional spinal fusion devices, when implanted into the vertebral column, the limited space within the vertebral column, or the shrinking of the intervertebral space due to disease, necessitates hammering the device into the column. This results in larger wounds or bone damage, increasing the difficulty of the surgery and slowing the patient's recovery. Furthermore, the poor stability of the implanted spinal fusion device contributes to poor treatment outcomes.

[0064] To address the aforementioned technical problems, this application provides a spinal fusion device. (See reference...) Figures 1-17 , Figure 1 A schematic diagram of a spinal fusion device provided in an embodiment of this application in a retracted state is shown. Figure 2 It shows Figure 1 A top view of the spinal fusion device shown. Figure 3 It shows Figure 1 An exploded view of the spinal fusion device shown. Figure 4 It shows Figure 1 The rear view of the spinal fusion device shown. Figure 5 It shows Figure 1 Left view of the spinal fusion device shown. Figure 6 It shows Figure 1 A schematic diagram of the first engagement between the first support plate 100 and the adjustment member 310 in the spinal fusion device shown. Figure 7 It shows Figure 1 The diagram shows the second engagement of the first support plate 100 and the adjustment member 310 in the spinal fusion device. Figure 8 It shows Figure 1 A schematic diagram of the adjustment device 300 in the spinal fusion device shown. Figure 9 It shows Figure 1 The diagram shows the target position of the spinal fusion device in its deployed state. Figure 10 It shows Figure 9 A top view of the spinal fusion device shown. Figure 11 It shows Figure 9 The rear view of the spinal fusion device shown. Figure 12 It shows Figure 9 Left view of the spinal fusion device shown. Figure 13 It shows Figure 9 A schematic diagram of the first engagement between the first support plate 100 and the adjustment member 310 in the spinal fusion device shown. Figure 14 It shows Figure 9 The diagram shows the second engagement of the first support plate 100 and the adjustment member 310 in the spinal fusion device. Figure 15 It shows Figure 9 The diagram shows the interaction between the first support plate 100, the adjusting member 310, and the third limiting post 400 in the spinal fusion device. Figure 16 It shows Figure 9 A schematic diagram of the adjustment device 300 in the spinal fusion device shown. Figure 17 It shows Figure 9 A schematic diagram showing the interaction between the sliding component and the second support plate 200 in the spinal fusion device.

[0065] An embodiment of this application provides a spinal fusion device, which includes a first support plate 100, a second support plate 200, and an adjustment device 300. There are two first support plates 100, and the two first support plates 100 are arranged along a first direction, specifically, the first direction is... Figure 1 , Figures 3-9 and Figures 11-15 The second support plate 200 and the first support plate 100 are spaced apart along the second direction, which is at an angle to the first direction. Specifically, the second direction is... Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8 and Figure 9 , Figure 10 and Figure 12 The yy' direction; the adjusting device 300 is connected to the first support plate 100 and the second support plate 200; and when the adjusting device 300 is operated, it can make the two first support plates 100 move closer or further away from each other in the first direction, and at the same time drive the second support plate 200 and the first support plate 100 to move closer or further away from each other in the second direction.

[0066] When the aforementioned spinal fusion device needs to be implanted into the patient's spine 500, if it is necessary to adjust the spinal fusion device to a retracted state, the adjustment device 300 can be operated to bring the two first support plates 100 closer together in the first direction, and the second support plate 200 closer together with the first support plate 100 in the second direction, thereby adjusting the spinal fusion device to a retracted state. This minimizes the overall size of the spinal fusion device, resulting in a smaller incision during implantation, facilitating implantation and improving wound healing speed. Conversely, when the spinal fusion device is implanted into the spine, the adjustment device 300 can be operated to move the two first support plates 100 further apart in the first direction, and the second support plate 200 further apart with the first support plate 100 in the second direction, thereby adjusting the spinal fusion device to an extended state. This causes the overall size of the spinal fusion device to expand simultaneously in both the first and second directions, meaning the spinal fusion device expands in its height direction (…). Figure 1 and Figure 9 (yy' direction) and width direction ( Figure 1 and Figure 9 The zz' direction can be expanded, thereby increasing the size of the entire spinal fusion device and providing a larger support area for the vertebral column, resulting in better stability of the vertebral column and better treatment outcomes for patients.

[0067] Please see Figure 21 , Figure 21 It shows Figure 1The diagram shows a spinal fusion device implanted within the vertebral column 500. It should be noted that when this spinal fusion device is implanted within the vertebral column 500, Figure 21 In the diagram, y' indicates the direction of the patient's chest, y indicates the direction of the patient's back, x' indicates the direction of the patient's left side, and x indicates the direction of the patient's right side.

[0068] It should be noted that when the spinal fusion device of this application is implanted into the anterior end of the spine 500, it can be adjusted to the unfolded state by the adjustment device 300, and can support the spine 500 along the spine 500. Figure 21 The two parts in the yy' direction are more stable compared to the oblique and front placement methods.

[0069] The following is a detailed description of the structure of the spinal fusion device. Please refer to [link / reference needed]. Figures 18-20 , Figure 18 It shows Figure 1 A schematic diagram of the second support plate 200 in the spinal fusion device shown. Figure 19 It shows Figure 1 A first schematic diagram of the adjustment element 310 in the spinal fusion device shown. Figure 20 It shows Figure 1 A second schematic diagram of the adjustment element 310 in the spinal fusion device shown.

[0070] Please see Figure 3 and combined Figure 9 , Figure 10 , Figure 16 and Figure 17 An embodiment of this application provides an adjustment device 300 for a spinal fusion device, including an adjustment member 310, a moving component 320, and a sliding rod assembly 330. The adjustment member 310 is slidably connected to a first support plate 100. The moving component 320 is fixedly connected to the first support plate 100 and slidably connected to the adjustment member 310. The moving component 320 is movably connected to the sliding rod assembly 330. The side of the sliding rod assembly 330 away from the moving component 320 is slidably connected to a second support plate 200. When the moving component 320 slides relative to the adjustment member 310, it can drive the first support plate 100 to move along a first direction, and at the same time drive one side of the sliding rod assembly 330 to slide relative to the second support plate 200, so that the second support plate 200 moves closer to or further away from the first support plate 100 along a second direction.

[0071] Through the combined action of the adjusting member 310, the moving component 320, and the sliding component, when the moving component 320 slides relative to the adjusting member 310, the first support plate 100 moves closer or further away from each other along the first direction, and the second support plate 200 moves closer or further away from the first support plate 100 along the second direction. This causes the size of the entire spinal fusion device to shrink or expand simultaneously along the first direction and along the second direction, thus making the size of the entire spinal fusion device shrink or expand. The movement control process is simple and convenient.

[0072] Please see Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 12 and Figure 16 An embodiment of this application provides a movable component 320 for a spinal fusion device, including a first movable component 321 and a second movable component 322. The first movable component 321 is snapped into connection with a first support plate 100, and the second movable component 322 passes through an adjusting component 310 and abuts against the first movable component 321. When the second movable component 322 moves relative to the adjusting component 310 along a third direction, it can drive the first movable component 321 to move, so that the first movable component 321 drives the first support plate 100 to slide relative to the adjusting component 310 and move along a first direction. At the same time, the sliding rod assembly 330 slides relative to the second support plate 200, so that the second support plate 200 moves closer to or further away from the first support plate 100 along a second direction. The third direction is angled relative to the first and second directions; specifically, the third direction is... Figure 3 , Figure 6 , Figure 9 and Figure 13 In the xx' direction. Through the cooperation of the second moving part 322 and the first moving part 321, when the second moving part 322 moves relative to the adjusting part 310 in a third direction, it can drive the first support plate 100 to move in the first direction and the second support plate 200 to move in the second direction. The control of the entire moving process is very simple and convenient.

[0073] Please see Figure 3 , Figure 8 , Figure 9 , Figure 10 , Figure 16 and Figure 17The sliding rod assembly 330 of the spinal fusion device provided in one embodiment of this application includes a first sliding rod 331 and a second sliding rod 332 rotatably connected to each other; one end of the first sliding rod 331 is connected to a first moving member 321, and the other end of the first sliding rod 331 is slidably connected to a second support plate 200; one end of the second sliding rod 332 is rotatably connected to an adjusting member 310, and the other end of the second sliding rod 332 is slidably connected to the second support plate 200; when the first moving member 321 moves along a third direction, the ends of the first sliding rod 331 and the second sliding rod 332 on the same side in the second direction can move closer to or further away from each other.

[0074] When the first moving member 321 moves along a third direction under the drive of the second moving member 322, the ends of the first sliding rod 331 and the second sliding rod 332 that are close to the first support plate 100 move closer or further away from each other, thereby causing the ends of the first sliding rod 331 and the second sliding rod 332 that are close to the second support plate 200 to slide relative to the second support plate 200, so that the distance between the second support plate 200 and the first support plate 100 changes, so that the size of the spinal fusion device along the second direction increases or decreases.

[0075] Please see Figure 17 and Figure 18 In one embodiment of this application, the second support plate 200 of the spinal fusion device is provided with a first limiting groove 210 and a second limiting groove 220 on both sides along a first direction. A first limiting post 3311 protrudes from the side of the first sliding rod 331 near the second support plate 200 along the first direction, and the first limiting post 3311 is slidably disposed within the first limiting groove 210. A second limiting post 3321 protrudes from the side of the second sliding rod 332 near the second support plate 200 along the first direction, and the second limiting post 3321 is slidably disposed within the second limiting groove 220. Through the cooperation of the first limiting post 3311 with the first limiting groove 210, and the cooperation of the second limiting post 3321 with the second limiting groove 220, the sliding of the first sliding rod 331 and the second sliding rod 332 is made safer when the spinal fusion device is adjusted from a retracted state to an extended state.

[0076] In one specific embodiment, when the spinal fusion device is in the deployed target position, the first limiting post 3311 abuts against the third-direction groove wall of the first limiting groove 210, and the second limiting post 3321 abuts against the third-direction groove wall of the second limiting groove 220. Through the cooperation of the first limiting post 3311 and the first limiting groove 210, and the cooperation of the second limiting post 3321 and the second limiting groove 220, when the spinal fusion device is in the deployed target position, that is... Figure 10When the device is in the correct position, the maximum sliding distance between the first sliding rod 331 and the second sliding rod 332 can be controlled by the abutting action between the groove wall of the first limiting groove 210 in the third direction and the groove wall of the second limiting groove 220 in the third direction. This allows the maximum size of the spinal fusion device to be determined when it unfolds in the second direction, making the treatment of the patient more precise.

[0077] Please see Figure 3 , Figure 7 and Figure 9 In one embodiment of this application, the spinal fusion device has two first support plates 100 with locking grooves 140 arranged opposite each other along a first direction. The two ends of the first moving member 321 along the first direction are respectively locked into the locking grooves 140. Through the locking engagement between the locking grooves 140 and the first moving member 321, when the second moving member 322 drives the first moving member 321 to move along a third direction, the first moving member 321 can drive the first support plate 100 to move. At the same time, the locking engagement between the locking grooves 140 and the first moving member 321 is also easy to assemble and disassemble.

[0078] Please see Figure 6 , Figure 13 and Figure 15 In one embodiment of this application, the adjusting member 310 of the spinal fusion device has a first inclined surface 311, and the first support plate 100 has a second inclined surface 110. The first inclined surface 311 and the second inclined surface 110 cooperate to allow the first support plate 100 to slide relative to the adjusting member 310. When the first moving member 321 moves the first support plate 100, the first support plate 100 slides relative to the adjusting member 310 through the cooperation of the first inclined surface 311 and the second inclined surface 110, thereby making the movement of the first support plate 100 more stable.

[0079] Please see Figure 13 In one embodiment of this application, the adjusting member 310 of the spinal fusion device is also provided with a limiting boss 312 and the first support plate 100 is provided with a limiting groove 120; when the spinal fusion device is in the target position of the unfolded state, the limiting boss 312 is engaged in the limiting groove 120.

[0080] The cooperation of the limiting boss 312 and the limiting groove 120 ensures that when the spinal fusion device is in the target position in the deployed state, that is... Figure 13 The position shown can prevent the first support plate 100 from continuing to slide relative to the adjusting member 310, thereby allowing the maximum size of the spinal fusion device to be determined when it unfolds along the first direction, making the treatment of the patient more precise; at the same time, it can also prevent the first support plate 100 from slipping off the adjusting member 310 when it slides relative to the adjusting member 310, making the sliding process of the first support plate 100 safer.

[0081] It should be noted that by setting the height of the first inclined plane 311 along the first direction, that is... Figure 15 The height along the zz' direction can be used to determine the maximum size of the spinal fusion device after it is deployed along the first direction when it is in the target position in the deployed state.

[0082] Please see Figure 15 In one embodiment of this application, the adjusting member 310 of the spinal fusion device has a first abutment surface 315, and the first support plate 100 has a second abutment surface 150. Both the first abutment surface 315 and the second abutment surface 150 extend along a third direction, specifically, the third direction is the length direction of the adjusting member 310. Figure 15 In the xx' direction; when the spinal fusion device is in the target position of the unfolded state, the first abutment surface 315 abuts against the second abutment surface 150.

[0083] Since both the first abutment surface 315 and the second abutment surface 150 extend along a third direction, when the spinal fusion device is in the target position in its deployed state, the first support plate 100 and the adjustment member 310 contact each other through the planar area where the first abutment surface 315 and the second abutment surface 150 cooperate, resulting in better stability. Compared to inclined plane support or threaded support, the spinal fusion device is less prone to failure.

[0084] In one specific embodiment, the second movable member 322 is a threaded connector that is threadedly connected to the adjusting member 310. When the second movable member 322 is screwed, it can move relative to the adjusting member 310 in a third direction. In this application, since the first abutment surface 315 and the second abutment surface 150 are in planar contact, and the support after unfolding is achieved by the surface contact of the first abutment surface 315 and the second abutment surface 150, the thread of the second movable member 322 will not be stressed, and the service life of the second movable member 322 will be longer.

[0085] Please see Figure 3 and Figure 15 and Figure 20The spinal fusion device provided in one embodiment of this application further includes a third limiting post 400, one end of which is fixedly connected to the first support plate 100; the adjusting member 310 is constructed with a third limiting groove 313, and the other end of the third limiting post 400 is slidably connected to the groove wall of the third limiting groove 313; when the first support plate 100 slides relative to the adjusting member 310, the third limiting post 400 slides relative to the groove wall of the third limiting groove 313. When the first support plate 100 slides relative to the adjusting member 310, the cooperation between the third limiting post 400 and the third limiting groove 313 makes the sliding process of the first support plate 100 safer, and also prevents the first support plate 100 from dislodging from the adjusting member 310, thus enhancing safety.

[0086] In one specific embodiment, the limiting post 400 is arranged along the second direction, that is... Figure 1 The yy' direction in the middle.

[0087] Please see Figure 15 In one specific embodiment, the third limiting groove 313 includes a first segment 3131 and a second segment 3132 that are connected to each other. The first segment 3131 is inclined and parallel to the first inclined surface 311, and the length of the first segment 3131 is the same as the length of the first inclined surface 311. The second segment 3132 is parallel to the first abutment surface 315, and the length of the second segment 3132 is the same as that of the first abutment surface 315. This allows the third limiting post 400 to slide smoothly within the first segment 3131 and the second segment 3132 when the first support plate 100 slides relative to the adjusting member 310, without any jamming.

[0088] Please see Figure 5 and Figure 12 The sidewall of the first support plate 100 along the first direction is designated as the first sidewall 130, and the sidewall of the second support plate 200 along the first direction is designated as the second sidewall 230; please refer to [link to relevant documentation]. Figure 5 In one embodiment of this application, when the spinal fusion device is in the retracted state, the first sidewall 130 and the second sidewall 230 located on the same side are on different planes. Please refer to... Figure 12 When the spinal fusion device is in the target position with the device deployed, the first sidewall 130 and the second sidewall 230 on the same side are on the same plane, that is... Figure 12 The p1 plane and p2 plane in the diagram. This arrangement ensures that when the spinal fusion device of this application is in the deployed target position, the entire spinal fusion device moves along the first direction, which is... Figure 12 The side walls on both sides in the zz' direction can be in the same plane, thus effectively ensuring the opening angle of the spinal fusion device after it is opened, thereby restoring the physiological angle of the spine to 50°.

[0089] It should be noted that when the spinal fusion device is in the retracted state, that is... Figure 5 In the fusion state, although the first sidewall 130 and the second sidewall 230 on the same side are on different planes, they are parallel to each other, and both the first sidewall 130 and the second sidewall 230 are inclined planes, that is, they have a certain tilt angle in the second direction. This makes it possible for the spinal fusion device to be in the fusion state. Figure 12 When the target position of the unfolded state is shown, the first sidewall 130 and the second sidewall 230 on the same side can be on the same plane, and the plane has a certain tilt angle relative to the vertical plane, thereby effectively ensuring the unfolding angle of the spinal fusion device after unfolding, thus restoring the physiological angle of the spine 50°.

[0090] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A spinal fusion device, characterized in that, The spinal fusion device includes: The first support plate (100) has two components, and the two first support plates (100) are arranged along a first direction; The second support plate (200) is spaced apart from the first support plate (100) along a second direction, and the second direction is at an angle to the first direction; Adjustment device (300), the adjustment device (300) includes adjustment member (310), moving component (320) and sliding rod assembly (330); The adjusting member (310) is slidably connected to the first support plate (100); The movable component (320) is fixedly connected to the first support plate (100), and the movable component (320) is slidably connected to the adjusting member (310), and the movable component (320) is movably connected to the sliding rod assembly (330); The sliding rod assembly (330) is slidably connected to the second support plate (200) on the side opposite to the moving assembly (320); When the moving component (320) slides relative to the adjusting member (310), it can drive the two first support plates (100) to move closer or further away from each other in the first direction, and at the same time drive one side of the sliding rod assembly (330) to slide relative to the second support plate (200), so that the second support plate (200) moves closer or further away from the first support plate (100) in the second direction.

2. The spinal fusion device according to claim 1, characterized in that, The moving component (320) includes a first moving part (321) and a second moving part (322); the first moving part (321) is snapped into connection with the first support plate (100), and the second moving part (322) passes through the adjusting part (310) and abuts against the first moving part (321); When the second moving member (322) moves relative to the adjusting member (310) in a third direction, it can drive the first moving member (321) to move, so that the first moving member (321) drives the first support plate (100) to slide relative to the adjusting member (310) and move in the first direction. At the same time, the sliding rod assembly (330) slides relative to the second support plate (200), so that the second support plate (200) moves closer to or further away from the first support plate (100) in the second direction. The third direction is set at an angle to the first direction and the second direction.

3. The spinal fusion device according to claim 2, characterized in that, The sliding rod assembly (330) includes a first sliding rod (331) and a second sliding rod (332) that are rotatably connected to each other. One end of the first sliding rod (331) is connected to the first moving member (321), and the other end of the first sliding rod (331) is slidably connected to the second support plate (200); one end of the second sliding rod (332) is rotatably connected to the adjusting member (310), and the other end of the second sliding rod (332) is slidably connected to the second support plate (200); When the first moving member (321) moves along the third direction, the ends of the first sliding rod (331) and the second sliding rod (332) on the same side in the second direction can move closer to or further away from each other.

4. The spinal fusion device according to claim 3, characterized in that, The second support plate (200) has a first limiting groove (210) and a second limiting groove (220) respectively constructed on both sides along the first direction. The first sliding rod (331) has a first limiting post (3311) protruding along the first direction on the side near the second support plate (200), and the first limiting post (3311) is slidably disposed in the first limiting groove (210); The second sliding rod (332) has a second limiting post (3321) protruding along the first direction on the side near the second support plate (200), and the second limiting post (3321) is slidably disposed in the second limiting groove (220).

5. The spinal fusion device according to claim 2, characterized in that, The two first support plates (100) are respectively provided with snap-fit ​​grooves (140) arranged opposite to each other along the first direction, and the two ends of the first moving member (321) along the first direction are respectively snapped into the snap-fit ​​grooves (140).

6. The spinal fusion device according to any one of claims 1-5, characterized in that, The adjusting member (310) has a first inclined surface (311) and the first support plate (100) has a second inclined surface (110). The first inclined surface (311) and the second inclined surface (110) cooperate to allow the first support plate (100) to slide relative to the adjusting member (310).

7. The spinal fusion device according to any one of claims 1-5, characterized in that, The adjusting member (310) is also provided with a limiting boss (312), and the first support plate (100) is provided with a limiting groove (120). When the spinal fusion device is in the target position of the unfolded state, the limiting boss (312) is engaged in the limiting groove (120).

8. The spinal fusion device according to any one of claims 1-5, characterized in that, The adjusting member (310) is provided with a first abutting surface (315), and the first support plate (100) is provided with a second abutting surface (150); both the first abutting surface (315) and the second abutting surface (150) extend in a third direction; When the spinal fusion device is in the target position in the unfolded state, the first abutment surface (315) abuts against the second abutment surface (150).

9. The spinal fusion device according to any one of claims 1-5, characterized in that, The spinal fusion device also includes a third limiting column (400), one end of which is fixedly connected to the first support plate (100); The adjusting member (310) is constructed with a third limiting groove (313), and the other end of the third limiting post (400) is slidably disposed in the third limiting groove (313); When the first support plate (100) slides relative to the adjusting member (310), the third limiting post (400) slides within the third limiting groove (313).

10. The spinal fusion device according to any one of claims 1-5, characterized in that, The side wall of the first support plate (100) along the first direction is the first side wall (130), and the side wall of the second support plate (200) along the first direction is the second side wall (230). When the spinal fusion device is in the retracted state, the first sidewall (130) and the second sidewall (230) on the same side are on different planes; When the spinal fusion device is in the target position in the unfolded state, the first sidewall (130) and the second sidewall (230) on the same side are on the same plane.

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