Spinal fusion device

Abstract

This invention relates to a spinal fusion device. The device includes an actuation component, a first support component, a third support component, and two second support components. Each second support component has a first end and a second end opposite to each other. The first ends of the two second support components are rotatably connected to the two ends of the first support component, and the second ends of the two second support components are rotatably connected to the two ends of the third support component. The actuation component can be operatively actuated to drive the first and second support components to rotate relative to each other, and to drive the third support component to rotate relative to the second support components, such that the first end of one of the two second support components can move closer to or further away from the second end of the other, and the first end of the other two second support components can move further away from or closer to the second end of one, while keeping the first and third support components relatively far apart. This increases the area of ​​the projected profile of the spinal fusion device in the height direction, improving the support range.

Description

Technical Field

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

[0002] Spinal fusion devices are used for lumbar degenerative instability due to various causes, such as herniated discs, spinal stenosis, or lumbar spondylolisthesis. Currently, expandable spinal fusion devices are commonly used. These are surgically implanted into the spinal incision, and then expanded by the relative sliding of the inclined planes through threads to support the spine at the target height. However, existing expandable spinal fusion devices have a limited support range and low stability. Summary of the Invention

[0003] Therefore, it is necessary to provide a spinal fusion device to address the technical problems of small support range and low support stability of existing scalable spinal fusion devices.

[0004] A spinal fusion device includes an actuation component, a first support component, a third support component, and two second support components. Each second support component has a first end and a second end opposite to each other. The first ends of the two second support components are rotatably connected to the two ends of the first support component, and the second ends of the two second support components are rotatably connected to the two ends of the third support component. The actuation component is operably actuated to drive the first support component and the second support components to rotate relative to each other, and to drive the third support component and the second support components to rotate relative to each other, such that the first end of one of the two second support components can move closer to or further away from the second end of the other, and the first end of the other of the two second support components can move further away from or closer to the second end of one, while keeping the first support component and the third support component relatively far apart.

[0005] In one embodiment, the first support component includes a first mounting member and a first support member, the first support member being connected to the first mounting member, and the first support member being able to move away from or closer to the first mounting member in the height direction.

[0006] In one embodiment, the second support component includes a second mounting member and a second support member, the second mounting member being rotatably connected to the first mounting member and the third support component respectively, and the second support member being movably connected to the second mounting member;

[0007] When the first support component and the third support component are in a relatively far apart state, the overlapping portion of the second support member near the first end can overlap with the first support member, and when the first support member is far away from the first mounting member, the second support member can be lifted relative to the second mounting member under the action of the first support member.

[0008] In one embodiment, the second mounting member has a receiving groove, and the second support member is partially housed in the receiving groove. The first support member is used to lift the portion of the second support member housed in the receiving groove from the receiving groove, so that the first end of the second support member is away from the second mounting member, forming an inclined surface that descends in height from the first end to the second end opposite to the first end.

[0009] In one embodiment, the second support assembly further includes an elastic element and a support block, the support block being located between the bottom wall of the receiving groove and the support block, one end of the elastic element being connected to the groove wall of the receiving groove and the other end being connected to the support block, the elastic element being configured to apply a force to the support block to move the support block away from the first support assembly, and to support the second support member when the portion of the second support member received in the receiving groove is lifted from the receiving groove.

[0010] In one embodiment, the second support member has a plurality of stepped walls connected in sequence on the side facing the second mounting member. The plurality of stepped walls include a first limiting wall. When the portion of the second support member that is accommodated in the receiving groove is lifted from the receiving groove, the first limiting wall is used to abut against the support block to restrict the support block from moving away from the first support assembly.

[0011] In one embodiment, the actuation assembly includes a limiting rod, a first mounting base and a second mounting base, one of the two second support assemblies is rotatably connected to the first mounting base and rotatably connected to the first support assembly through the first mounting base, and the other of the two second support assemblies is rotatably connected to the second mounting base and rotatably connected to the third support assembly through the second mounting base;

[0012] One end of the limiting rod is used to connect to the first mounting base, and the other end is used to pass through the second mounting base. The limiting rod extends at least partially from the end of the second mounting base away from the first mounting base. The second mounting base can move closer to the first mounting base along the extension direction of the limiting rod, so that the first support assembly and the third support assembly are relatively far apart.

[0013] In one embodiment, the spinal fusion device further includes a positioning element, one end of which is connected to the first mounting base, and the other end of which is inserted through and connected to the second mounting base to limit the relative distance between the second mounting base and the first mounting base.

[0014] In one embodiment, the first mounting member includes a slider and a connecting block, the connecting block being slidably connected to the slider, and the opposite ends of the connecting block and the slider being rotatably connected to two second support components, respectively. The slider is used to slide relative to the connecting block to adjust the length of the first mounting member in the sliding direction between the slider and the connecting block.

[0015] In one embodiment, the first support assembly further includes a worm gear and a worm, the worm gear being rotatably connected to the first mounting member and threadedly connected to the first support member, the worm engaging with the worm gear, and the worm driving the worm gear to rotate so as to drive the first support member away from or towards the first mounting member.

[0016] Beneficial effects:

[0017] The spinal fusion device provided in this embodiment of the invention includes an actuation component, a first support component, a third support component, and two second support components. Each second support component has a first end and a second end opposite to each other. The first ends of the two second support components are rotatably connected to the two ends of the first support component, and the second ends of the two second support components are rotatably connected to the two ends of the third support component. The actuation component can be operatively actuated to drive the first support component and the second support component to rotate relative to each other, and to drive the third support component and the second support component to rotate relative to each other, so that the first end of one of the two second support components can move closer to or further away from the second end of the other, and the first end of the other of the two second support components can move further away from or closer to the second end of one, and the first support component and the third support component move further away from each other. In this application, the first ends of the two second support components are rotatably connected to the two ends of the first support component, and the second ends of the two second support components are rotatably connected to the two ends of the third support component, so that the projected contours of the first support component, the third support component, and the two second support components in the height direction form a quadrilateral. Through the actuation component, the first support component and the second support component can be driven to rotate relative to each other, and the third support component can be driven to rotate relative to the second support component, so that the first end of one of the two second support components can move closer or further away from the second end of the other, and the first end of the other of the two second support components can move further away or closer to the second end of one, and the first support component and the third support component can move further away from each other, that is, drive the quadrilateral to open, thereby increasing the area of ​​the projected contour of the spinal fusion device, increasing the support range of the spinal fusion device, and improving the support stability of the spinal fusion device. Attached Figure Description

[0018] Figure 1 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a retracted state. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the spinal fusion device provided in an embodiment of the present invention in an open state.

[0020] Figure 3 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 1 .

[0021] Figure 4 This is a first schematic diagram of the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention.

[0022] Figure 5 This is a second schematic diagram showing the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention.

[0023] Figure 6This is a third schematic diagram showing the spinal fusion device and the spine in conjunction with an embodiment of the present invention.

[0024] Figure 7 This is a fourth schematic diagram showing the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention.

[0025] Figure 8 This is an exploded view of a spinal fusion device provided in an embodiment of the present invention.

[0026] Figure 9 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 2 .

[0027] Figure 10 This is a schematic diagram of the cooperation between the first support member and the second support member in a spinal fusion device provided in an embodiment of the present invention.

[0028] Figure 11 A partial schematic diagram of the second support component in a spinal fusion device provided in an embodiment of the present invention. Figure 1 .

[0029] Figure 12 A partial schematic diagram of the second support component in a spinal fusion device provided in an embodiment of the present invention. Figure 2 .

[0030] Figure 13 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 3 .

[0031] Figure 14 This is a schematic diagram of the first mounting component in a spinal fusion device provided in an embodiment of the present invention.

[0032] Figure 15 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a retracted state. Figure 2 .

[0033] Figure 16 This is a partial schematic diagram of the first mounting component in a spinal fusion device provided in an embodiment of the present invention.

[0034] Figure 17 This is a schematic diagram of the first support member cooperating with the worm gear in a spinal fusion device provided in an embodiment of the present invention.

[0035] Icon labels:

[0036] 100-First support assembly; 110-First mounting component; 111-Slider; 112-Connecting block; 113-Slide groove; 114-Connecting seat; 115-Slide rod; 116-Mounting groove; 120-First support member; 121-First support platform; 122-Support column; 123-First recess; 124-First inclined surface; 200-Second support assembly; 210-Second mounting component; 211-Receiving groove; 220-Second support member; 221-Second limiting wall; 222-First limiting wall; 223-Matching wall; 224-First section; 225-Second section; 225-Slide plate; 226- 227 - Clearance hole; 228 - Second support platform; 230 - Fitting wall; 240 - Elastic element; 241 - Support block; 241 - First abutment wall; 300 - Actuation component; 320 - Limiting rod; 330 - First mounting seat; 331 - First mounting hole; 340 - Second mounting seat; 341 - Second mounting hole; 342 - Third mounting hole; 350 - Positioning element; 351 - Positioning rod; 352 - Boss; 360 - Worm gear; 361 - Mating hole; 370 - Worm; 400 - Third support component; 410 - Second inclined surface; 420 - Third support platform; 430 - Second recess; 500 - Spine. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be 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 the present invention. However, the present invention can be practiced 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 the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of 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. "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.

[0042] It should be noted that when 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. When 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] See Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 1 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a retracted state. Figure 1 . Figure 2 This is a schematic diagram of the spinal fusion device provided in an embodiment of the present invention in an open state. Figure 4This is a first schematic diagram of the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention. Figure 5 This is a second schematic diagram showing the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention. Figure 6 This is a third schematic diagram showing the spinal fusion device and the spine in conjunction with an embodiment of the present invention. Figure 7 This is a fourth schematic diagram showing the spinal fusion device and its interaction with the spine, according to an embodiment of the present invention. Figure 8 This is an exploded view of a spinal fusion device according to an embodiment of the present invention. The spinal fusion device provided in this embodiment includes an actuation component 300, a first support component 100, a third support component 400, and two second support components 200. Each second support component 200 has a first end and a second end opposite to each other. The first ends of the two second support components 200 are rotatably connected to the two ends of the first support component 100, and the second ends of the two second support components 200 are rotatably connected to the two ends of the third support component 400. The actuation component 300 can be operatively actuated to drive the first support component 100 and the second support component 200 to rotate relative to each other, and to drive the third support component 400 and the second support component 200 to rotate relative to each other, so that the first end of one of the two second support components 200 can move closer to or further away from the second end of the other, and the first end of the other of the two second support components 200 can move further away from or closer to the second end of one, while keeping the first support component 100 and the third support component 400 relatively far apart.

[0044] Specifically, in this application, the first ends of the two second support components 200 are rotatably connected to the two ends of the first support component 100, and the second ends of the two second support components 200 are rotatably connected to the two ends of the third support component 400, so that the projected contours of the first support component 100, the third support component 400, and the two second support components 200 in the height direction form a quadrilateral. Through the actuation component 300, the first support component 100 and the second support component 200 can be driven to rotate relative to each other, and the third support component 400 and the second support component 200 can be driven to rotate relative to each other. This allows the first end of one of the two second support components 200 to move closer to or further away from the second end of the other, and the first end of the other of the two second support components 200 to move further away from or closer to the second end of one, while the first support component 100 and the third support component 400 move further away from each other, i.e., the quadrilateral is opened, thereby increasing the area of ​​the projected contour of the spinal fusion device, improving the support range of the spinal fusion device, and thus improving the support stability of the spinal fusion device. It should be noted that the height direction refers to the height direction of the spinal fusion device.

[0045] The spinal fusion device has a contracted state and an extended state. When the spinal fusion device is in the contracted state, the first end of one of the two second support components 200 is closest to the second end of the other, and the first end of the other of the two second support components 200 is furthest from the second end of the first. The first support component 100 and the third support component 400 are closest to each other, so that the quadrilateral is in a folded state, which minimizes the space occupied by the spinal fusion device. This makes it easier for the spinal fusion device to be inserted into the vertebral 500 space, avoids the problem of difficulty in inserting the spinal fusion device, and improves the adaptability of the spinal fusion device.

[0046] When the spinal fusion device is in the extended state, the distance between the first support component 100 and the third support component 400 is at its greatest, meaning they are parallel. This maximizes the quadrilateral area, allowing the spinal fusion device to provide a wider support range and greater stability. The specific process of the spinal fusion device transitioning from the contracted to the extended state can be found in the appendix of the instruction manual. Figure 4-7 .

[0047] See Figure 1 , Figure 2 and Figure 3 , Figure 3 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 1 In one embodiment, the first support assembly 100 includes a first mounting member 110 and a first support member 120. The first support member 120 is connected to the first mounting member 110, and the first support member 120 can move away from or closer to the first mounting member 110 in the height direction, thereby making the height of the first support assembly 100 adjustable to meet the spinal expansion height requirements and enable the patient to achieve better physiological structural recovery. The spinal fusion device also has a supported state; when the first support member 120 moves away from the first mounting member 110 in the height direction to support the spine 500, the spinal fusion device transitions from the expansion state to the supported state.

[0048] See Figure 1 , Figure 2 , Figure 3 and Figure 8 , Figure 8This is an exploded view of a spinal fusion device according to an embodiment of the present invention. In one embodiment, the second support assembly 200 includes a second mounting member 210 and a second support member 220. The second mounting member 210 is rotatably connected to the first mounting member 110 and the third support assembly 400, respectively, and the second support member 220 is movably connected to the second mounting member 210. When the first support assembly 100 and the third support assembly 400 are in a relatively far apart state, the overlapping portion of the second support member 220 near the first end can overlap with the first support member 120, and when the first support member 120 is far away from the first mounting member 110, the second support member 220 can be lifted relative to the second mounting member 210 under the action of the first support member 120.

[0049] Specifically, when the first support component 100 and the third support component 400 are in a relatively far apart state, that is, when the spinal fusion device is in an open state, the overlapping part of the second support component 220 abuts against the side of the first support component 120 away from the first mounting component 110. When the first support component 120 is far away from the first mounting component 110, the first support component 120 can drive the second support component 220 to be far away from the second mounting component 210, so as to achieve lifting, thereby making the height of the second support component 200 adjustable, so that the second support component 200 can meet the open height requirements of the spine.

[0050] See Figure 2 , Figure 3 , Figure 8 , Figure 9 and Figure 10 , Figure 9 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 2 . Figure 10 This is a schematic diagram of the cooperation between a first support member and a second support member in a spinal fusion device according to an embodiment of the present invention. In one embodiment, a receiving groove 211 is constructed inside the second mounting member 210, and a portion of the second support member 220 is accommodated in the receiving groove 211. The first support member 120 is used to drive the portion of the second support member 220 accommodated in the receiving groove 211 to be lifted from the receiving groove 211, so that the side of the second support member 220 away from the second mounting member 210 forms an inclined surface with a height decreasing from the first end to the second end opposite to the first end.

[0051] Specifically, the second support member 220 is partially housed in the receiving groove 211. When the first support member 120 moves away from the first mounting member 110, the first support member 120 can lift the overlapping portion of the second support member 220 upwards, while the second end of the second support member 220 does not lift. This causes the second support member 220 to tilt and lift relative to the second mounting member 210, resulting in a downward-sloping surface on the side of the second support member 220 away from the second mounting member 210, from the first end to the opposite second end. In other words, in this application, the height of the second support member 200 can be adjusted by adjusting the height of the first support assembly 100 to meet the spinal expansion height requirements. Furthermore, the downward-sloping surface on the side of the second support member 220 away from the second mounting member 210 allows for adaptation to the spine, improving the adaptability of the spinal fusion device.

[0052] Furthermore, the first support member 120 has a first inclined surface 124 on the side opposite to the first mounting member 110, and the third support member has a second inclined surface 410 on the side opposite to the first mounting member 110 with the same inclination as the first inclined surface 124. The side of the second support member 220 away from the second mounting member 210 has the same inclination as the first inclined surface 124. This makes the sides of the first support member 120, the second support member 220, and the third support assembly 400 opposite to the first mounting member 110 located on the same plane, so as to stably support the spine 500. That is, the spinal fusion device in this application can improve the support range of the spinal fusion device while expanding the height and angle of the spinal fusion device, thereby improving adaptability to meet the requirements of spinal expansion height and enabling patients to achieve better physiological structural recovery.

[0053] The first support member 120 has two ends with first recesses 123 that are recessed relative to the first inclined surface 124. The first support member 120 overlaps with the first recesses 123, so that when the spinal fusion device is in a supported state, the sides of the first support member 120 and the second support member 220 away from the first mounting member 110 can be located on the same plane. The third support assembly 400 includes a third support platform 420, the two ends of which are rotatably connected to the two first mounting members 110 respectively. A second inclined surface 410 is disposed on the third support platform 420. The two ends of the third support platform 420 have second recesses 430 that are recessed relative to the second inclined surface 410. The second support member 220 is partially placed in the second recesses 430, so that when the spinal fusion device is in a supported state, the sides of the second support member 220 and the third support assembly 400 away from the first mounting member 110 can be located on the same plane.

[0054] Furthermore, the second support member 220 includes a sliding plate 225 and a second support platform 227 connected to each other. The sliding plate 225 is inserted into the receiving groove 211, and the second support platform 227 is placed outside the receiving groove 211 and is used to overlap with the first recess 123. The side of the second support platform 227 away from the overlap has an inclined fitting wall 228. When the side of the second support platform 227 near the overlap is raised so that the sides of the first support member 120, the second support member 220, and the third support assembly 400 away from the first mounting member 110 are on the same plane, the fitting wall 228 is used to fit with the second mounting member 210, thereby making the second mounting member 210 stably support the side of the second support member 220 away from the overlap, while the side of the second support platform 227 near the overlap is stably supported by the first support member 120, thereby making the second support platform 227 stably supported and improving the stability of the second support member 220 supporting the spine 500.

[0055] See Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11 , Figure 11 A partial schematic diagram of the second support component in a spinal fusion device provided in an embodiment of the present invention. Figure 1 The second support assembly 200 further includes an elastic element 230 and a support block 240. The support block 240 is located between the bottom wall of the receiving groove 211 and the second support assembly 200. One end of the elastic element 230 is connected to the groove wall of the receiving groove 211, and the other end is connected to the support block 240. The elastic element 230 is configured to apply a force to the support block 240 to move the support block 240 away from the first support assembly 100, and to support the second support assembly 220 when the portion of the second support assembly 200 that is received in the receiving groove 211 is lifted from the receiving groove 211.

[0056] Specifically, in the direction from the first end to the second end, the sliding plate 225 faces the bottom wall of the receiving groove 211 with a decreasing height. The support block 240 is located between the bottom wall of the receiving groove 211 and the second support member 200 to support the sliding plate 225. When the first support member 120 moves away from the first mounting member 110 to lift the overlapping portion of the second support member 220, the side of the sliding plate 225 near the overlapping portion separates from the support block 240. Due to the provision of the elastic member 230, the elastic member 230 applies a force to the support block 240, causing the support block 240 to move away from the first support assembly 100, thereby abutting against the lower side of the sliding plate 225 again, thus preventing the sliding plate 225 from being suspended in the air, stabilizing the sliding plate 225, and improving the stability of the second support member 220. Preferably, the elastic member 230 is a spring.

[0057] Furthermore, the slide plate 225 is provided with a clearance hole 226 extending along the extension direction of the second support member 220. The elastic member 230 passes through the clearance hole 226 and is located at the end of the support block 240 away from the first support member 120. The elastic member 230 is used to apply a pulling force to the support block 240, causing the support block 240 to move away from the first support assembly 100, so as to stably support the slide plate 225. That is, the clearance hole 226 can play a guiding role, so that the elastic member 230 applies a stable pulling force to the support block 240 along the extension direction of the second support member 220.

[0058] See Figure 2 , Figure 8 , Figure 9 , Figure 10 , Figure 11 ,and Figure 12 , Figure 12 A partial schematic diagram of the second support component in a spinal fusion device provided in an embodiment of the present invention. Figure 2 In one embodiment, the second support member 220 has a plurality of stepped walls connected in sequence on the side facing the second mounting member 210. The plurality of stepped walls include a first limiting wall 222. When the portion of the second support member 220 that is accommodated in the receiving groove 211 is lifted from the receiving groove 211, the first limiting wall 222 is used to abut against the support block 240 to restrict the support block 240 from moving away from the first support assembly 100.

[0059] Specifically, the support block 240 has a first abutment wall 241 on the side facing the slide plate 225. When the spinal fusion device is in the supported state, the first abutment wall 241 is used to abut against the first limiting wall 222, thereby restricting the support block 240 from moving away from the first support assembly 100 under the pulling force of the elastic member 230. This prevents the support block 240 from pushing the second support member 220 upward, so as to ensure that the side of the first support member 120, the second support member 220 and the third support assembly 400 away from the first mounting member 110 can be located on the same plane, thereby improving the reliability of the spinal fusion device.

[0060] Furthermore, the multiple stepped walls also include a second limiting wall 221, which is located on the side of the first limiting wall 222 near the first support assembly 100. When the spinal fusion device is in a retracted state, the second limiting wall 221 is used to abut against the first abutment wall 241 to restrict the support block 240 from moving away from the first support assembly 100 under the tension of the elastic member 230. This prevents the support block 240 from pushing the second support member 220 upward, i.e., prevents the second support member 220 from being lifted relative to the second mounting member 210, thus preventing interference with the spinal fusion device entering the vertebral 500 gap and improving the reliability of the spinal fusion device.

[0061] Furthermore, the multiple stepped walls also include a mating wall 223, which is located between the first limiting wall 222 and the second limiting wall 221, and is connected to the first limiting wall 222 and the second limiting wall 221 respectively. The mating wall 223 is used to abut against the support block 240 to guide the support block 240 to move away from the first support member 120.

[0062] The mating wall 223 includes a first segment 224 and a second segment 225 that are connected to each other. The first segment 224 is located between the first limiting wall 222 and the second segment 225. The first segment 224 is used to fit against the support block 240 when the first limiting wall 222 abuts against the first abutting wall 241, so that the support block 240 stably supports the slide plate 225. The second segment 225 is used to fit against the support block 240 when the second limiting wall 221 abuts against the first abutting wall 241, so that the support block 240 stably supports the slide plate 225.

[0063] See Figures 1-8 In one embodiment, the actuation assembly 300 further includes a limiting rod 320, a first mounting base 330, and a second mounting base 340. One of the two second support assemblies 200 is rotatably connected to the first mounting base 330 and rotatably connected to the first support assembly 100 through the first mounting base 330. The other of the two second support assemblies 200 is rotatably connected to the second mounting base 340 and rotatably connected to the third support assembly 400 through the second mounting base 340. One end of the limiting rod 320 is used to connect to the first mounting base 330, and the other end is used to pass through the second mounting base 340. The limiting rod 320 extends at least partially from the end of the second mounting base 340 away from the first mounting base 330. The second mounting base 340 can move closer to the first mounting base 330 along the extension direction of the limiting rod 320 so that the first support assembly 100 and the third support assembly 400 are relatively far apart.

[0064] Specifically, one end of the first mounting base 330 is rotatably connected to one of the two second mounting members 210, and the other end is rotatably connected to the first mounting member 110. One end of the second mounting base 340 is rotatably connected to the other of the two second mounting members 210, and the other end is rotatably connected to the third support platform 420. When the spinal fusion device is inserted into the intervertebral space 500, the spinal fusion device is in a contracted state. The limiting rod 320 extends at least partially beyond the end of the second mounting base 340 away from the first mounting base 330, so that the limiting rod 320 can be pulled by a tool and the end of the second mounting base 340 away from the first mounting base 330 can be pushed forward, so that the second mounting base 340 moves closer to the first mounting base 330 along the extension direction of the limiting rod 320, thereby changing the spinal fusion device from a contracted state to an open state.

[0065] The limiting rod 320 can fix the relative position of the second mounting base 340 and the first mounting base 330, thereby preventing the spinal fusion device from moving within the vertebral 500 gap when it changes from a contracted state to an open state, and ensuring that the opened spinal fusion device is accurately positioned in the preset position.

[0066] Furthermore, the first mounting base 330 has a first mounting hole 331, the second mounting base 340 has a second mounting hole 341, the limiting rod 320 is threadedly connected to the hole wall of the first mounting hole 331, and the limiting rod 320 passes through the second mounting hole 341.

[0067] See Figure 1 , Figure 2 , Figure 3 and Figure 13 , Figure 13 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a supported state. Figure 3 In one embodiment, the spinal fusion device further includes a positioning member 350, one end of which is connected to the first mounting base 330, and the other end is inserted through and connected to the second mounting base 340 to limit the relative distance between the second mounting base 340 and the first mounting base 330.

[0068] Specifically, after the spinal fusion device is deformed to the open state, the limiting rod 320 is removed, and then the positioning member 350 is inserted into the first mounting hole 331 and the second mounting hole 341, so that one end of the positioning member 350 is connected to the first mounting seat 330 and the other end is connected to the second mounting seat 340, thereby limiting the first mounting seat 330 and the second mounting seat 340 to be relatively far apart, and improving the stability of the spinal fusion device.

[0069] Furthermore, the positioning member 350 includes a positioning rod 351. The end of the positioning rod 351 away from the first mounting seat 330 is provided with a boss 352. One end of the positioning rod 351 is threaded to the wall of the first mounting hole 331, and the other end is pressed against the end of the second mounting seat 340 away from the first mounting seat 330 through the boss 352, thereby limiting the relative distance between the first mounting seat 330 and the second mounting seat 340.

[0070] See Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 14 and Figure 15 , Figure 14 This is a schematic diagram of the first mounting component in a spinal fusion device provided in an embodiment of the present invention. Figure 15 A schematic diagram of the spinal fusion device provided in an embodiment of the present invention in a retracted state. Figure 2In one embodiment, the first mounting member 110 includes a slider 111 and a connecting block 112. The connecting block 112 is slidably connected to the slider 111, and the opposite ends of the connecting block 112 and the slider 111 are respectively rotatably connected to two second support components 200. The slider 111 is used to slide relative to the connecting block 112 to adjust the length of the first mounting member 110 in the sliding direction between the slider 111 and the connecting block 112.

[0071] Specifically, the end of the connecting block 112 away from the slider 111 is rotatably connected to the first mounting base 330, and the end of the slider 111 away from the connecting block 112 is rotatably connected to the first end of the corresponding second support component 200. When the second mounting base 340 approaches the first mounting base 330, the connecting block 112 rotates relative to the first mounting base 330 and slides relative to the slider 111, thereby shortening the length of the first mounting component 110 in the sliding direction between the slider 111 and the connecting block 112, making the length of the first mounting component 110 shorter than the length of the third support platform 420. This causes the projected contours of the first support component 100, the two second support components 200, and the third support component 400 in the height direction to form a trapezoid, making the projected contour of the spinal fusion device close to the shape of the spinal projection contour, thereby enabling the spinal fusion device to more stably support the spine 500.

[0072] Furthermore, the slider 111 is provided with a groove 113, and the connecting block 112 includes a connecting seat 114 and a sliding rod 115. The connecting seat 114 is rotatably connected to the second mounting member 210, and the sliding rod 115 is connected to the connecting seat 114 and at least partially slides in the groove 113. When the spinal fusion device is in the extended state, the sliding rod 115 is fully accommodated in the extended state, and the connecting seat 114 abuts against the slider 111 to limit the sliding rod 115 from continuing to move relative to the groove wall of the groove 113, thereby limiting the length of the first support assembly 100 and improving the stability of the spinal fusion device.

[0073] See Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 16 and Figure 17 , Figure 16 This is a partial schematic diagram of the first mounting component in a spinal fusion device provided in an embodiment of the present invention. Figure 17This is a schematic diagram showing the engagement of the first support member 120 and the worm gear 360 in a spinal fusion device according to an embodiment of the present invention. In one embodiment, the first support assembly 100 further includes a worm gear 360 and a worm 370. The worm gear 360 is rotatably connected to the first mounting member 110 and threadedly connected to the first support member 120. The worm 370 meshes with the worm gear 360 and is used to drive the worm gear 360 to rotate, thereby driving the first support member 120 away from or closer to the first mounting member 110.

[0074] Specifically, the worm gear 360 is provided with a mating hole 361, and the first support member 120 includes a first support platform 121 and a support column 122 connected to each other. The first inclined surface 124 is disposed on the first support platform 121, and the support column 122 is inserted into the mating hole 361 of the worm gear 360 and is threadedly connected to the hole wall of the mating hole 361. When the worm 370 drives the worm gear 360 to rotate, the support column 122 moves relative to the worm gear 360, thereby causing the support column 122 to drive the first support platform 121 to move closer to or further away from the first mounting member 110.

[0075] Furthermore, the first mounting member 110 has a mounting groove 116, the worm gear 360 is accommodated in the mounting groove 116, the second mounting base 340 has a third mounting hole 342, one end of the worm 370 is used to pass through the third mounting hole 342, and the other end extends into the mounting groove 116, meshes with the worm gear 360, and abuts against the groove wall of the mounting groove 116, so that when the worm 370 is driven to rotate by a tool, the movement of the worm 370 is restricted, thereby driving the worm gear 360 to rotate.

[0076] In this design, one end of the worm gear 370 passes through the third mounting hole 342 of the second mounting base 340, and the other end extends into the mounting groove 116 of the first mounting member 110. One end of the positioning rod 351 extends into the second mounting base 340, and the other end connects to the first mounting base 330. This creates an angle between the extension direction of the worm gear 370 and the extension direction of the positioning rod 351, thus restricting the proximity of the second mounting base 340 and the first mounting base 330 and improving the stability of the spinal fusion device. It should be noted that when the spinal fusion device is in the retracted state, the worm gear 370 is located outside the second support assembly 200 and the second mounting base 340. Only when the spinal fusion device is in the extended state is the worm gear 370 inserted into the second support assembly 200 and the second mounting base 340 to cooperate with the worm wheel 360, thereby reducing the interference of the worm gear 370 on the transition of the spinal fusion device from the extended state to the supported state.

[0077] Furthermore, there are two worm gears 360, located at both ends of the worm 370, and two support columns 122. Each of the two worm gears 360 engages with one support column 122, thereby enabling the two support columns 122 to stably drive the first support platform 121 to rise and fall. The threads on the outer walls of the two worm gears 360 have opposite directions of rotation.

[0078] 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.

[0079] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A spinal fusion device, characterized in that, The spinal fusion device includes an actuation component (300), a first support component (100), a third support component (400), and two second support components (200). Each second support component (200) has a first end and a second end opposite to each other. The first ends of the two second support components (200) are rotatably connected to the two ends of the first support component (100), and the second ends of the two second support components (200) are rotatably connected to the two ends of the third support component (400). The actuation component (300) can be operatively actuated to drive the first support component (100) and the second support component (200) to rotate relative to each other, and to drive the third support component (400) and the second support component (200) to rotate relative to each other, so that the first end of one of the two second support components (200) and the second end of the other can move closer or further away from each other, and the first end of the other of the two second support components (200) and the second end of one of the two second support components (200) can move further away or closer to each other, and the first support component (100) and the third support component (400) move further away from each other. The second support assembly (200) includes a second mounting member (210), a second support member (220), an elastic member (230), and a support block (240). The second mounting member (210) has a receiving groove (211) constructed therein. The second support member (220) is partially housed in the receiving groove (211). The support block (240) is located between the bottom wall of the receiving groove (211) and the second support member (220). One end of the elastic member (230) is connected to the groove wall of the receiving groove (211), and the other end is connected to the support block (240). The elastic member (230) is configured to apply a force to the support block (240) to move the support block (240) away from the first support assembly (100) and to support the second support member (220) when the portion of the second support member (220) housed in the receiving groove (211) is lifted from the receiving groove (211). The second support member (220) has a plurality of stepped walls connected in sequence on the side facing the second mounting member (210). The plurality of stepped walls include a second limiting wall (221). When the spinal fusion device is in a retracted state, the second limiting wall (221) is used to abut against the support block (240) to restrict the support block (240) from moving away from the first support assembly (100) under the tension of the elastic member (230).

2. The spinal fusion device according to claim 1, characterized in that, The first support assembly (100) includes a first mounting member (110) and a first support member (120), the first support member (120) being connected to the first mounting member (110), and the first support member (120) being able to move away from or closer to the first mounting member (110) in the height direction.

3. The spinal fusion device according to claim 2, characterized in that, The second mounting member (210) is rotatably connected to the first mounting member (110) and the third support assembly (400) respectively, and the second support member (220) is movably connected to the second mounting member (210); When the first support assembly (100) and the third support assembly (400) are in a relatively far apart state, the overlapping portion of the second support member (220) near the first end can overlap with the first support member (120), and when the first support member (120) is far away from the first mounting member (110), the second support member (220) can be lifted relative to the second mounting member (210) under the action of the first support member (120).

4. The spinal fusion device according to claim 3, characterized in that, The first support member (120) is used to drive the portion of the second support member (220) that is accommodated in the receiving groove (211) to be lifted from the receiving groove (211) so that the first end of the second support member (220) is away from the second mounting member (210), forming an inclined surface that descends in height from the first end to the second end opposite to the first end.

5. The spinal fusion device according to claim 4, characterized in that, The plurality of stepped walls include a first limiting wall (222) that abuts against the support block (240) to restrict the support block (240) from moving away from the first support assembly (100) when the portion of the second support member (220) received in the receiving groove (211) is lifted from the receiving groove (211).

6. The spinal fusion device according to claim 5, characterized in that, The plurality of stepped walls also include a mating wall (223), which is located between the first limiting wall (222) and the second limiting wall (221) and is connected to the first limiting wall (222) and the second limiting wall (221) respectively. The mating wall (223) is used to abut against the support block (240) to guide the support block (240) to move away from the first support member (120).

7. The spinal fusion device according to any one of claims 1-6, characterized in that, The actuation assembly (300) includes a limiting rod (320), a first mounting base (330), and a second mounting base (340). One of the two second support assemblies (200) is rotatably connected to the first mounting base (330) and rotatably connected to the first support assembly (100) through the first mounting base (330). The other of the two second support assemblies (200) is rotatably connected to the second mounting base (340) and rotatably connected to the third support assembly (400) through the second mounting base (340). One end of the limiting rod (320) is used to connect to the first mounting base (330), and the other end is used to pass through the second mounting base (340). The limiting rod (320) extends at least partially from the end of the second mounting base (340) away from the first mounting base (330). The second mounting base (340) can move closer to the first mounting base (330) along the extension direction of the limiting rod (320) so that the first support assembly (100) and the third support assembly (400) are relatively far apart.

8. The spinal fusion device according to claim 7, characterized in that, The spinal fusion device further includes a positioning element (350), one end of which is connected to the first mounting base (330), and the other end is inserted through the second mounting base (340) and connected to the second mounting base (340) to limit the second mounting base (340) from being relatively far away from the first mounting base (330).

9. The spinal fusion device according to any one of claims 2-6, characterized in that, The first mounting component (110) includes a slider (111) and a connecting block (112). The connecting block (112) is slidably connected to the slider (111), and the opposite ends of the connecting block (112) and the slider (111) are respectively rotatably connected to two second support components (200). The slider (111) is used to slide relative to the connecting block (112) to adjust the length of the first mounting component (110) in the sliding direction between the slider (111) and the connecting block (112).

10. The spinal fusion device according to any one of claims 2-6, characterized in that, The first support assembly (100) further includes a worm gear (360) and a worm (370). The worm gear (360) is rotatably connected to the first mounting member (110) and threadedly connected to the first support member (120). The worm (370) meshes with the worm gear (360) and is used to drive the worm gear (360) to rotate, thereby driving the first support member (120) to move away from or closer to the first mounting member (110).

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