Bidirectional extensible spinal fusion cage

Abstract

The invention relates to a two-way extensible spinal fusion cage. The two-way extensible spinal fusion cage comprises a first supporting assembly and a second supporting assembly, wherein the first supporting assembly and the second supporting assembly are arranged in a spaced mode in the first direction; and an actuating assembly, the first support assembly and the second support assembly being expandable in a second direction; the actuating assembly is in sliding connection with the first supporting assembly and the second supporting assembly, and the actuating assembly is used for moving in the third direction to drive the first supporting assembly and the second supporting assembly to be away from each other in the first direction; moreover, the actuating assembly is further used for moving in the third direction to drive the first supporting assembly and the second supporting assembly to expand in the second direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other. The bidirectional expandable spinal fusion cage provided by the invention can be expanded in the first direction and the second direction, and compared with an existing spinal fusion cage, the expansion directions are increased, and the supporting range is enlarged.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a bidirectionally expandable spinal fusion device. Background Art

[0002] Spinal fusion devices are used for lumbar degenerative instability caused by various reasons, combined with disc herniation or spinal stenosis, or lumbar spondylolisthesis caused by various reasons. A spinal fusion device is implanted at the diseased site of a patient to achieve the purpose of functional reconstruction. However, the existing spinal fusion devices have limited expansion directions, resulting in limited support ranges of the spinal fusion devices. Summary of the Invention

[0003] Based on this, in view of the problem of the expansion direction of spinal fusion devices, it is necessary to provide a bidirectionally expandable spinal fusion device.

[0004] A bidirectionally expandable spinal fusion device, the bidirectionally expandable spinal fusion device comprising:

[0005] A first support assembly and a second support assembly arranged at intervals from the first support assembly in a first direction;

[0006] The first support assembly and the second support assembly are capable of expanding in a second direction;

[0007] An actuating assembly, the actuating assembly being slidably connected to both the first support assembly and the second support assembly, the actuating assembly being configured to move in a third direction to drive the first support assembly and the second support assembly to move away from each other in the first direction;

[0008] Moreover, the actuating assembly is further configured to move in the third direction to drive the first support assembly and the second support assembly to expand in the second direction, any two of the first direction, the second direction and the third direction being perpendicular to each other.

[0009] In one embodiment, the actuating assembly includes a first actuating member and a second actuating member arranged in the third direction, both the first actuating member and the second actuating member being slidably engaged with the first support assembly and the second support assembly, the first actuating member and the second actuating member being capable of moving relative to each other in the third direction to drive the first support assembly and the second support assembly to expand in the first direction and the second direction.

[0010] In one embodiment, inclined surfaces are provided on both the first support assembly and the second support assembly;

[0011] The first actuator and the second actuator are provided with driving surfaces that slide with the inclined surface. The first actuator and the second actuator are configured to drive the driving surfaces and the inclined surface to slide relative to each other when moving toward each other along the third direction, so as to drive the first support component and the second support component to move away from each other in the first direction.

[0012] In one embodiment, the actuating assembly further includes a transmission member, the transmission member is threadedly connected to the second actuating member, and the transmission member is configured to rotate to drive the first actuating member and the second actuating member to move relative to each other along the third direction.

[0013] In one embodiment, the transmission member includes a screw portion, a smooth rod portion and a limiting portion that are connected to each other, the screw portion is threadedly connected to the second actuator, a V-shaped anti-loosening convex surface is provided on the side of the limiting portion close to the screw portion, a V-shaped anti-loosening concave surface is provided on the side of the first actuator close to the limiting portion, and the anti-loosening convex surface cooperates with the anti-loosening concave surface.

[0014] In one embodiment, the actuating assembly further includes a retaining ring, the first actuating member is provided with a through hole for the light rod portion to pass through, a limiting groove is provided on the hole wall of the through hole, a limiting groove is provided on the light rod portion, the retaining ring is sleeved on the limiting groove and accommodated in the limiting groove.

[0015] In one embodiment, a limiting sliding groove is provided on the surface of the actuating assembly along the second direction, and the direction of the limiting sliding groove is parallel to the driving surface;

[0016] The first supporting assembly and the second supporting assembly are provided with limiting sliding blocks that slidably cooperate with the limiting sliding groove. The limiting sliding groove and the limiting sliding block slidably cooperate with each other to enable the actuating assembly to move along the third direction, so as to drive the first supporting assembly and the second supporting assembly not to move away from each other in the second direction when they move away from each other in the first direction.

[0017] In one of the embodiments, the limiting slide groove further includes a flared portion disposed at its tail section, and the limiting sliding block can be disengaged from the limiting slide groove along the second direction when sliding to the flared portion.

[0018] In one embodiment, the first support assembly and the second support assembly both include:

[0019] an upper support member, and a lower support member arranged along the second direction with the upper support member;

[0020] Two expansion driving members arranged along the third direction, both of the two expansion driving members are slidably engaged with the upper support member and the lower support member, and the two expansion driving members can be driven to move relative to each other along the third direction so that the upper support member and the lower support member expand along the second direction.

[0021] In one embodiment, upper expansion inclined surfaces are provided at both ends of the upper support member along the third direction, and upper expansion sliding grooves are formed in the upper expansion inclined surfaces. Lower expansion inclined surfaces are provided at both ends of the lower support member along the third direction, and lower expansion sliding grooves are formed in the lower expansion inclined surfaces. And the upper expansion sliding grooves and the lower expansion sliding grooves are arranged at an angle;

[0022] The expansion driving member is provided with an upper expansion sliding block slidably engaged with the upper expansion sliding groove and a lower expansion sliding block slidably engaged with the lower expansion sliding groove. The upper expansion sliding block can slide along the upper expansion sliding groove, and the lower expansion sliding block can slide along the lower expansion sliding groove so that the upper support member and the lower support member expand along the second direction.

[0023] In one embodiment, one of the expansion driving member and the actuating assembly is provided with a guiding sliding groove, and the other is provided with a guiding sliding block slidably engaged with the guiding sliding groove;

[0024] A limiting surface is provided at the end of the guiding sliding groove, and an abutting portion is provided on the guiding sliding block. When the guiding sliding block slides along the guiding sliding groove to the end, the abutting portion abuts against the limiting surface.

[0025] For the above-mentioned bidirectionally expandable spinal fusion device, the first support assembly and the second support assembly are arranged at intervals along the first direction, and the actuating assembly is slidably engaged with the first support assembly and the second support assembly. When the actuating assembly moves along the third direction, it can drive the first support assembly and the second support assembly to move away from each other along the first direction, so that the bidirectionally expandable spinal fusion device expands in the first direction. Moreover, when the actuating assembly moves along the third direction, it can drive the first support assembly and the second support assembly to expand in the second direction. The bidirectionally expandable spinal fusion device provided by the present application can expand along the first direction and the second direction. Compared with the existing spinal fusion device, the number of expansion directions is increased and the support range is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural view of the bidirectionally expandable spinal fusion device provided by the present application in the first state.

[0027] Figure 2 It is a schematic structural view of the bidirectionally expandable spinal fusion device provided by the present application in the second state.

[0028] Figure 3 Schematic diagram of the bidirectional expandable spinal fusion device provided by this application in the third state.

[0029] Figure 4 Schematic diagram of the bidirectional expandable spinal fusion device provided by this application in the fourth state.

[0030] Figure 5 Exploded view of the bidirectional expandable spinal fusion device provided by this application.

[0031] Figure 6 Schematic diagram of the first support component provided by this application.

[0032] Figure 7 Schematic diagram of the second support component provided by this application.

[0033] Figure 8 Schematic diagram of the first lower support member of the first support component provided by this application.

[0034] Figure 9 Schematic diagram of the first perspective of the first expansion driving member of the first support component provided by this application.

[0035] Figure 10 Schematic diagram of the second perspective of the first expansion driving member of the first support component provided by this application.

[0036] Figure 11 Schematic diagram of the bidirectional expandable spinal fusion device provided by this application in the fifth state.

[0037] Figure 12 Schematic diagram of the sliding fit between the first expansion driving member and the first actuating member provided by this application.

[0038] Figure 13 Schematic diagram of the first perspective of the first actuating member provided by this application.

[0039] Figure 14 Schematic diagram of the second perspective of the first actuating member provided by this application.

[0040] Figure 15 Cross-sectional view of the first actuating member provided by this application.

[0041] Figure 16 Schematic diagram of the transmission member provided by this application.

[0042] Figure 17 Schematic diagram of the second actuating member provided by this application.

[0043] In the figure:

[0044] 100. First support assembly; 110. First upper support member; 111. Limit slider; 112. Upper extension chute; 120. First lower support member; 121. Lower extension chute; 130. First extension driving member; 131. Inclined surface; 132. Guide slider; 133. Upper extension slider; 134. Lower extension slider;

[0045] 200. Second support assembly; 210. Second upper support member; 220. Second lower support member; 230. Second extension driving member;

[0046] 300. Actuating assembly;

[0047] 400. First actuating member; 410. Driving surface; 420. Anti-loosening concave surface; 430. Limit groove; 440. Limit chute; 441. Chute portion; 442. Flared portion; 450. Guide chute; 451. Limit surface;

[0048] 500. Second actuating member;

[0049] 600. Transmission member; 610. Screw portion; 620. Limit portion; 621. Anti-loosening convex surface; 630. Smooth rod portion; 631. Limit groove;

[0050] 700. Retaining ring. Detailed implementation manners

[0051] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0053] In addition, if 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate 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 intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0057] This application provides a bidirectionally expandable spinal fusion device, such as Figures 1 to 17As shown in the figure, the bidirectional expandable spinal fusion device includes a first support assembly 100, a second support assembly 200 arranged at an interval from the first support assembly 100 in a first direction; and an actuating assembly 300. The first support assembly 100 and the second support assembly 200 can be expanded in a second direction; the actuating assembly 300 is slidably connected to both the first support assembly 100 and the second support assembly 200, and the actuating assembly 300 is used to move in a third direction to drive the first support assembly 100 and the second support assembly 200 to move away from each other in the first direction; and, the actuating assembly 300 is also used to move in the third direction to drive the first support assembly 100 and the second support assembly 200 to expand in the second direction. Any two of the first direction, the second direction, and the third direction are perpendicular to each other.

[0058] For the above bidirectional expandable spinal fusion device, the first support assembly 100 and the second support assembly 200 are arranged at an interval in the first direction, and the actuating assembly 300 is slidably engaged with the first support assembly 100 and the second support assembly 200. When the actuating assembly 300 moves in the third direction, it can drive the first support assembly 100 and the second support assembly 200 to move away from each other in the first direction, so that the bidirectional expandable spinal fusion device is deployed in the first direction. Moreover, when the actuating assembly 300 moves in the third direction, it can drive the first support assembly 100 and the second support assembly 200 to expand in the second direction. The bidirectional expandable spinal fusion device provided in the present application can expand in the first direction and the second direction. Compared with the existing spinal fusion devices, the number of expansion directions is increased and the support range is increased.

[0059] In some preferred embodiments, the second direction is the height direction. At this time, the bidirectional expandable spinal fusion device expands first in the width direction and then in the height direction during expansion.

[0060] In other embodiments, the first direction is the height direction. At this time, the bidirectional expandable spinal fusion device expands first in the height direction and then in the width direction during expansion.

[0061] In some embodiments, such as Figures 1 to 5As shown, the actuating assembly 300 includes a first actuating member 400 and a second actuating member 500 arranged along a third direction. The first actuating member 400 and the second actuating member 500 are both slidably matched with the first supporting assembly 100 and the second supporting assembly 200. The first actuating member 400 and the second actuating member 500 can move relative to each other along the third direction to drive the first supporting assembly 100 and the second supporting assembly 200 to expand in the first direction and the second direction. The first actuating member 400 and the second actuating member 500 are arranged along the third direction. When the first actuating member 400 and the second actuating member 500 move toward each other along the third direction, they can be located between the first supporting assembly 100 and the second supporting assembly 200, thereby spreading the first supporting assembly 100 and the second supporting assembly 200 apart, so that the first supporting assembly 100 and the second supporting assembly 200 are relatively far away from each other along the first direction. After the first supporting assembly 100 and the second supporting assembly 200 are extended to their positions along the first direction, the first actuating member 400 and the second actuating member 500 continue to move toward each other, so that the first supporting assembly 100 and the second supporting assembly 200 can be extended along the second direction respectively.

[0062] Specifically, Figures 5 to 17 As shown, the first support assembly 100 and the second support assembly 200 are both provided with an inclined surface 131; the first actuator 400 and the second actuator 500 are provided with a driving surface 410 that slidably cooperates with the inclined surface 131, and the first actuator 400 and the second actuator 500 are configured to drive the driving surface 410 and the inclined surface 131 to slide relative to each other when moving toward each other along the third direction, so as to drive the first support assembly 100 and the second support assembly 200 to move away from each other in the first direction. An inclined surface 131 is provided on the first support assembly 100 and the second support assembly 200, and a driving surface 410 is provided on the first actuating member 400 and the second actuating member 500. When the first actuating member 400 and the second actuating member 500 move relative to each other along the third direction, the driving surface 410 slides along the inclined surface 131, thereby limiting the sliding direction of the first actuating member 400 and the second actuating member 500, so that the first actuating member 400 and the second actuating member 500 extend between the first support assembly 100 and the second support assembly 200 to separate the first support assembly 100 and the second support assembly 200. As the first actuating member 400 and the second actuating member 500 continue to move toward each other, the first support assembly 100 and the second support assembly 200 move away from each other.

[0063] More specifically, if Figures 5 to 17 As shown, the driving surface 410 includes a first driving surface and a second driving surface. The first driving surface cooperates with the inclined surface 131 of the first supporting component 100, and the second driving surface cooperates with the inclined surface 131 of the second supporting component 200, and the first driving surface and the second driving surface are set at an angle.

[0064] Specifically,Figures 5 to 17 As shown, the actuating assembly 300 further includes a transmission member 600, which is threadedly connected to the second actuating member 500, and the transmission member 600 is configured to rotate to drive the first actuating member 400 and the second actuating member 500 to move relative to each other along the third direction. The transmission member 600 is threadedly connected to the second actuating member 500, and the transmission member 600 is rotated, thereby driving the second brake member to move along the axial direction of the transmission member 600, and then move in a direction close to the first actuating member 400, so as to achieve relative movement of the first actuating member 400 and the second actuating member 500.

[0065] It should be noted that if Figures 5 to 17 As shown, the axial direction of the transmission member 600 is parallel to the third direction.

[0066] In some embodiments, the transmission member 600 is only connected to the second actuating member 500 .

[0067] In some embodiments, Figures 1 to 5 As shown, the transmission member 600 passes through the first actuating member 400 and is threadedly connected to the second actuating member 500 .

[0068] In a specific embodiment, if Figures 5 to 17 As shown, the transmission member 600 includes a screw portion 610, a smooth rod portion 630 and a limiting portion 620 that are connected to each other. The screw portion 610 is threadedly connected to the second actuator 500. A V-shaped anti-loosening convex surface 621 is provided on the side of the limiting portion 620 close to the screw portion 610. A V-shaped anti-loosening concave surface 420 is provided on the side of the first actuator 400 close to the limiting portion 620, and the anti-loosening convex surface 621 cooperates with the anti-loosening concave surface 420. The screw portion 610 is connected to the limiting portion 620 through the light rod portion 630, and the transmission member 600 passes through the first actuator 400 and is threadedly connected to the second actuator 500, that is, the screw portion 610 of the transmission member 600 is threadedly connected to the second actuator 500, the light rod portion 630 is passed through the first actuator 400, and the anti-loosening convex surface 621 of the limiting portion 620 can be located in the anti-loosening concave surface 420, thereby limiting the rotation of the transmission member 600.

[0069] It can be understood that the anti-loosening convex surface 621 and the anti-loosening concave surface 420 cooperate with each other to form an anti-loosening structure. When expanded, the transmission member 600 moves forward and backward relative to the first actuator 400, and the moving distance is the axial dimension of the anti-loosening convex surface 621 along the transmission member 600.

[0070] More specifically, the dimension of the anti-loosening convex surface 621 along the axial direction of the transmission member 600 is one quarter of the thread pitch of the screw portion 610 of the transmission member 600 .

[0071] In some embodiments, Figures 5 to 17As shown, the actuating assembly 300 further includes a retaining ring 700. The first actuating member 400 is provided with a through hole for the light rod portion 630 to pass through. A limiting groove 430 is provided on the inner wall of the through hole. A limiting groove 631 is provided on the light rod portion 630. The retaining ring 700 is sleeved on the limiting groove 631 and is received in the limiting groove 430. By providing the limiting groove 631 on the light rod portion 630 and sleeving the retaining ring 700 on the limiting groove 631, the axial movement of the retaining ring 700 along the light rod portion 630 is restricted. The limiting groove 430 is provided on the inner wall of the through hole. When the transmission member 600 passes through the first actuating member 400 and the second actuating member 500, the retaining ring 700 can be located in the limiting groove 430, and the outer wall of the retaining ring 700 abuts against the groove wall of the limiting groove 430, further restricting the axial movement of the transmission member 600.

[0072] In a specific embodiment, an annular limiting groove 631 is formed on the outer peripheral surface of the light rod portion 630.

[0073] In a specific embodiment, as Figures 5 to 17 shown, two annular protrusions are provided on the outer peripheral surface of the light rod portion 630. The two annular protrusions are arranged at intervals along the axial direction of the light rod portion 630, and the limiting groove 631 is formed between the two annular protrusions.

[0074] In some embodiments, as Figures 5 to 17 shown, a limiting sliding groove 440 is provided on the surface of the actuating assembly 300 along the second direction. The direction of the limiting sliding groove 440 is parallel to the driving surface 410. Limiting sliding blocks 111 that are slidably engaged with the limiting sliding groove 440 are provided on the first supporting assembly 100 and the second supporting assembly 200. The limiting sliding groove 440 and the limiting sliding blocks 111 are slidably engaged to enable the actuating assembly 300 to move along the third direction, so that when the first supporting assembly 100 and the second supporting assembly 200 move away from each other in the first direction, they do not move away from each other in the second direction. By providing the limiting sliding groove 440 and the limiting sliding blocks 111, since the direction of the limiting sliding groove 440 is parallel to the driving surface 410, when the first actuating member 400 and the second actuating member 500 of the braking assembly move relative to each other along the third direction, the limiting sliding blocks 111 can slide along the limiting sliding groove 440, which not only further restricts the moving direction of the first actuating member 400 and the second actuating member 500, but also prevents the first supporting assembly 100 and the second supporting assembly 200 from expanding in the second direction when the first supporting assembly 100 and the second supporting assembly 200 move away from each other in the first direction.

[0075] Specifically, as Figures 5 to 17As shown, the limiting chute 440 further includes a flared portion 442 provided at its tail section. When the limiting slider 111 slides to the flared portion 442, it can disengage from the limiting chute 440 along the second direction. When the limiting slider 111 slides along the limiting chute 440, since the limiting slider 111 is located within the limiting chute 440, the first support assembly 100 and the second support assembly 200 cannot expand along the second direction. However, when the limiting slider 111 slides to the flared portion 442, the limiting slider 111 can disengage from the limiting chute 440 along the second direction. At this time, the first support assembly 100 and the second support assembly 200 can expand along the second direction.

[0076] More specifically, as Figures 5 to 17 shown, the limiting chute 440 includes a chute portion 441 communicating with the flared portion 442. The limiting slider 111 extends into the chute portion 441 and slides along the chute portion 441.

[0077] More specifically, as Figures 5 to 17 shown, the limiting chute 440 is a dovetail groove or a T-shaped groove, etc.

[0078] It can be understood that the limiting chute 440 is provided on the actuating assembly 300, that is, the limiting chute 440 is provided on both the first actuating member 400 and the second actuating member 500.

[0079] In some embodiments, as Figures 5 to 17 shown, two limiting chutes 440 are provided on each end face of the actuating assembly 300 along the second direction. One of the limiting chutes 440 cooperates with the limiting slider 111 on the first support assembly 100, and the other limiting chute 440 cooperates with the limiting slider 111 on the second support assembly 200.

[0080] In some embodiments, as Figures 1 to 17 shown, both the first support assembly 100 and the second support assembly 200 include an upper support member, a lower support member arranged along the second direction with the upper support member; and two expansion driving members arranged along the third direction. Both of the two expansion driving members are slidably engaged with the upper support member and the lower support member. The two expansion driving members can be driven and move relative to each other along the third direction to cause the upper support member and the lower support member to expand along the second direction. The first actuating member 400 and the second actuating member 500 of the actuating assembly 300 move relative to each other along the third direction, thereby driving the two expansion driving members to move along the third direction, and further causing the upper support member and the lower support member to move relatively away from each other along the second direction, so that the bidirectionally expandable spinal fusion device expands along the second direction.

[0081] As Figures 1 to 17As shown, the first support assembly 100 includes a first upper support member 110, a first lower support member 120, and two first expansion drive members 130. The second support assembly 200 includes a second upper support member 210, a second lower support member 220, and two second expansion drive members 230. The structures of the first support assembly 100 and the second support assembly 200 are the same, and the two sets of support assemblies are only distinguished by naming here.

[0082] Specifically, as Figures 5 to 17 shown, inclined surfaces 131 are provided on both the first support assembly 100 and the second support assembly 200, and the first actuator 400 and the second actuator 500 are provided with drive surfaces 410 that are slidably engaged with the inclined surfaces 131. That is, inclined surfaces 131 are provided on both the first expansion drive members 130 of the first support assembly 100 and the second expansion drive members 230 of the second support assembly 200. When the first actuator 400 and the second actuator 500 are configured to move towards each other in the third direction, the first actuator 400 and the second actuator 500 are configured to slide along the inclined surfaces 131 on the first expansion drive members 130 and the inclined surfaces 131 on the second expansion drive members 230.

[0083] It should be noted that, as Figures 5 to 17 shown, the drive surface 410 includes a first drive surface and a second drive surface. The first drive surface cooperates with the inclined surface 131 on the first expansion drive member 130, and the second drive surface cooperates with the inclined surface 131 on the second expansion drive member as shown in the figure.

[0084] Specifically, as Figures 5 to 17 shown, limit sliders 111 are provided on both the first support assembly 100 and the second support assembly 200. That is, limit sliders 111 are provided on both the first upper support member 110 and the first lower support member 120 of the first support assembly 100, and on both the second upper support member 210 and the second lower support member 220 of the second support assembly 200.

[0085] In some embodiments, as Figures 5 to 17As shown in the figure, upper extension inclined surfaces are provided at both ends of the upper support member in the third direction, and upper extension chutes 112 are formed in the upper extension inclined surfaces. Lower extension inclined surfaces are provided at both ends of the lower support member in the third direction, and lower extension chutes 121 are formed in the lower extension inclined surfaces. The upper extension chutes 112 and the lower extension chutes 121 are arranged at an angle. An upper extension slider 133 slidably engaged with the upper extension chute 112 and a lower extension slider 134 slidably engaged with the lower extension chute 121 are provided on the extension driving member. The upper extension slider 133 can slide along the upper extension chute 112, and the lower extension slider 134 can slide along the lower extension chute 121, so that the upper support member and the lower support member are extended in the second direction. An upper extension chute 112 is provided on the upper support member, and a lower extension chute 121 is provided on the lower support member. When the two extension driving members move relative to each other in the third direction, the upper extension slider 133 on the extension driving member slides along the upper extension chute, and the lower extension slider 134 slides along the lower extension chute, so that the upper support member and the lower support member move away from each other in the second direction, and further the two-way expandable spinal fusion device is unfolded in the second direction.

[0086] It can be understood that, as Figures 5 to 17 shown, upper extension chutes 112 are provided on the upper support member, that is, upper extension chutes 112 are provided on the first upper support member 110 of the first support assembly 100 and the second upper support member 210 of the second support assembly 200. Lower extension chutes 121 are provided on the lower support member, that is, lower extension chutes 121 are provided on the first lower support member 120 of the first support assembly 100 and the second lower support member 220 of the second support assembly 200. An upper extension slider 133 and a lower extension slider 134 are provided on the extension driving member, that is, an upper extension slider 133 and a lower extension slider 134 are provided on the first extension driving member 130 of the first support assembly 100 and the second extension driving member 230 of the second support assembly 200.

[0087] It should be noted that, as Figures 5 to 17 shown, upper extension inclined surfaces are provided at both ends of the upper support member in the third direction, and upper extension chutes 112 are formed in the upper extension inclined surfaces, that is, two upper extension chutes 112 are provided on the upper support member, and the two upper extension chutes 112 are arranged at an angle. Lower extension inclined surfaces are provided at both ends of the lower support member in the third direction, and lower extension chutes 121 are formed in the lower extension inclined surfaces, that is, two lower extension chutes 121 are provided on the lower support member, and the two lower extension chutes 121 are arranged at an angle.

[0088] In some embodiments, as Figures 5 to 17As shown, one of the expansion driving member and the actuating assembly 300 is provided with a guiding chute 450, and the other is provided with a guiding slider 132 that slidably cooperates with the guiding chute 450; a limiting surface 451 is provided at the end of the guiding chute 450, and an abutting portion is provided on the guiding slider 132. When the guiding slider 132 slides to the end along the guiding chute 450, the abutting portion abuts against the limiting surface 451. By providing the guiding chute 450 and the guiding slider 132, the relative sliding direction of the expansion driving member and the actuating assembly 300 is restricted. And a limiting surface 451 is provided in the guiding chute 450. When the guiding slider 132 slides to the end of the guiding chute 450, the abutting portion abuts against the limiting surface 451, which not only restricts the relative movement of the expansion driving member and the actuating assembly 300, thus enabling the expansion of the two-way expandable spinal fusion device in the first direction to be maintained. Moreover, at this time, the limiting surface 451 serves as a driving surface, and the first actuating member 400 and the second actuating member 500 drive the first support assembly 100 and the second support assembly 200 to expand in the second direction by pushing the limiting surface 451.

[0089] Specifically, as Figures 5 to 17 shown, the first actuating member 400 and the second actuating member 500 of the actuating assembly 300 are provided with a guiding chute 450 on the end surface in the second direction, and the expansion driving member is provided with a guiding slider 132.

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

[0091] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A bidirectional expandable spinal fusion device, characterized in that, the bidirectional expandable spinal fusion device comprises: a first support component (100), and a second support component (200) arranged at an interval from the first support component (100) in a first direction; the first support component (100) and the second support component (200) can expand in a second direction; an actuating component (300), the actuating component (300) is slidably connected to both the first support component (100) and the second support component (200), and the actuating component (300) is used to move in a third direction to drive the first support component (100) and the second support component (200) to move away from each other in the first direction; moreover, the actuating component (300) is further used to move in the third direction to drive the first support component (100) and the second support component (200) to expand in the second direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other.

2. The bidirectional expandable spinal fusion device according to claim 1, characterized in that, the actuating component (300) comprises a first actuating member (400) and a second actuating member (500) arranged in the third direction, both the first actuating member (400) and the second actuating member (500) are slidably matched with the first support component (100) and the second support component (200), and the first actuating member (400) and the second actuating member (500) can move relative to each other in the third direction to drive the first support component (100) and the second support component (200) to expand in the first direction and the second direction.

3. The bidirectional expandable spinal fusion device according to claim 2, characterized in that, inclined surfaces (131) are provided on both the first support component (100) and the second support component (200); the first actuating member (400) and the second actuating member (500) are provided with driving surfaces (410) slidably matched with the inclined surfaces (131), and the first actuating member (400) and the second actuating member (500) are configured to drive the driving surfaces (410) to slide relative to the inclined surfaces (131) when moving towards each other in the third direction, so as to drive the first support component (100) and the second support component (200) to move away from each other in the first direction.

4. The bidirectional expandable spinal fusion device according to claim 3, characterized in that, the actuating component (300) further comprises a transmission member (600), the transmission member (600) is threadedly connected to the second actuating member (500), and the transmission member (600) is configured to rotate to drive the first actuating member (400) and the second actuating member (500) to move relative to each other in the third direction.

5. The bidirectional expandable spinal fusion device according to claim 4, characterized in that, The transmission member (600) includes a screw portion (610), a smooth rod portion (630), and a limiting portion (620) that are connected to each other. The screw portion (610) is in threaded connection with the second actuating member (500). On one side of the limiting portion (620) close to the screw portion (610), there is a V-shaped anti-loosening convex surface (621). On one side of the first actuating member (400) close to the limiting portion (620), there is a V-shaped anti-loosening concave surface (420), and the anti-loosening convex surface (621) cooperates with the anti-loosening concave surface (420).

6. The bidirectional expandable spinal fusion device according to claim 5, wherein, the actuating assembly (300) further includes a retaining ring (700). The first actuating member (400) is provided with a through hole for the smooth rod portion (630) to pass through. On the hole wall of the through hole, there is a limiting groove (430). On the smooth rod portion (630), there is a limiting slot (631). The retaining ring (700) is sleeved on the limiting slot (631) and is received in the limiting groove (430).

7. The bidirectional expandable spinal fusion device according to claim 3, wherein, on the surface of the actuating assembly (300) along the second direction, there is a limiting sliding groove (440). The running direction of the limiting sliding groove (440) is parallel to the driving surface (410); on the first supporting assembly (100) and the second supporting assembly (200), there are limiting sliding blocks (111) that are slidably engaged with the limiting sliding groove (440). The limiting sliding groove (440) and the limiting sliding blocks (111) are slidably engaged so that the actuating assembly (300) moves in the third direction, so as to drive the first supporting assembly (100) and the second supporting assembly (200) not to move relatively away from each other in the second direction when moving away from each other in the first direction.

8. The bidirectional expandable spinal fusion device according to claim 7, wherein, the limiting sliding groove (440) further includes a flared portion (442) provided at its tail section. When the limiting sliding block (111) slides to the flared portion (442), it can disengage from the limiting sliding groove (440) along the second direction.

9. The bidirectional expandable spinal fusion device according to claim 1, wherein, both the first supporting assembly (100) and the second supporting assembly (200) include: an upper supporting member, and a lower supporting member arranged along the second direction with the upper supporting member; two expansion driving members arranged along the third direction. Both of the two expansion driving members are slidably engaged with the upper supporting member and the lower supporting member. The two expansion driving members can be driven and move relative to each other along the third direction so that the upper supporting member and the lower supporting member expand along the second direction.

10. The bidirectional expandable spinal fusion device according to claim 9, wherein, The two ends of the upper support member along the third direction are provided with upper expansion inclined surfaces and upper expansion sliding grooves (112) opened on the upper expansion inclined surfaces. The two ends of the lower support member along the third direction are provided with lower expansion inclined surfaces and lower expansion sliding grooves (121) opened on the lower expansion inclined surfaces. And the upper expansion sliding grooves (112) and the lower expansion sliding grooves (121) are arranged at an angle; The expansion driving member is provided with an upper expansion sliding block (133) slidably engaged with the upper expansion sliding groove (112) and a lower expansion sliding block (134) slidably engaged with the lower expansion sliding groove (121). The upper expansion sliding block (133) can slide along the upper expansion sliding groove (112), and the lower expansion sliding block (134) can slide along the lower expansion sliding groove (121), so that the upper support member and the lower support member expand along the second direction.

11. The bidirectional expandable spinal fusion device according to claim 9, characterized in that, One of the expansion driving member and the actuating assembly (300) is provided with a guiding sliding groove (450), and the other is provided with a guiding sliding block (132) slidably engaged with the guiding sliding groove (450); The end of the guiding sliding groove (450) is provided with a limiting surface (451). The guiding sliding block (132) is provided with an abutting portion. When the guiding sliding block (132) slides along the guiding sliding groove (450) to the end, the abutting portion abuts against the limiting surface (451).

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