Fusion cage with supporting height capable of being flexibly adjusted

Abstract

The invention relates to the technical field of medical instruments, in particular to a fusion cage with the supporting height capable of being flexibly adjusted. The fusion cage comprises a linkage mechanism which is provided with a guide seat, a brake assembly and a screw assembly rotatably embedded in the guide seat; the two supporting end plates are symmetrically arranged on the two sides of the linkage mechanism; the adjusting handle is used for rotating the screw rod assembly; wherein the two sides of a bottom plate of the supporting end plate are each provided with a flange edge, the two ends of each flange edge are each provided with a sliding groove, and the sliding grooves extend in the direction inclined to the bottom plate; the brake assembly comprises a first brake block and a second brake block which are in threaded connection with the screw assembly, and the first brake block and the second brake block are arranged on the screw assembly in a sleeving mode at intervals and are in sliding connection with the supporting end plate through the sliding groove. The screw assembly is provided with a spline hole used for being connected with the adjusting handle in an inserted mode.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a fusion device with a flexibly adjustable support height. Background Art

[0002] Spinal diseases, especially problems such as intervertebral disc herniation and prolapse, are particularly common in modern society. Intervertebral fusion surgery has its unique advantages in the treatment of lumbar disc herniation, spinal stenosis, spinal nerve decompression, and minimally invasive surgery. In order to cooperate with the surgery, orthopedic surgeons need to use a fusion device to support two adjacent vertebral bodies to reconstruct the vertebral height.

[0003] The fusion devices used in surgery generally have a fixed size and only have a single control method. During the surgery, surgical instruments such as trial molds need to be used to measure step by step to determine the suitable fusion device between the vertebral bodies with the removed intervertebral disc. Therefore, the surgical instruments frequently enter and exit the patient's body, which will irritate and interfere with tissues, nerves, muscles, etc., greatly increasing the complexity of the surgical process and reducing the success rate of the surgical treatment. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the related art. For this purpose, the present invention provides a fusion device with a flexibly adjustable support height to solve the problems of complex surgical process and low success rate caused by frequent use of surgical instruments such as trial molds during spinal surgery.

[0005] The present invention provides a fusion device with a flexibly adjustable support height, including: A linkage mechanism provided with a guide seat, a braking assembly, and a screw rod assembly rotatably embedded in the guide seat; Support end plates, two of the support end plates are symmetrically arranged on both sides of the linkage mechanism; An adjustment handle for rotating the screw rod assembly; Wherein, flanged edges are respectively arranged on both sides of the bottom plate of the support end plate, and sliding grooves are respectively arranged at both ends of the flanged edge, and the sliding grooves extend along a direction inclined to the bottom plate; The braking assembly includes a first braking block and a second braking block threadedly connected to the screw rod assembly. The first braking block and the second braking block are sleeved on the screw rod assembly at intervals and are slidably connected to the support end plate through the sliding grooves; The screw rod assembly is provided with a spline hole for inserting the adjustment handle.

[0006] According to the fusion device with a flexibly adjustable support height provided by the present invention, the screw rod assembly includes a first screw rod and a second screw rod, and the central axis of the first screw rod coincides with the central axis of the second screw rod; The guiding seat includes a first seat plate, a second seat plate and a third seat plate arranged at intervals in sequence. Two ends of the first screw rod are respectively rotatably connected to the first seat plate and the second seat plate, and two ends of the second screw rod are respectively rotatably connected to the second seat plate and the third seat plate; The first brake block is sleeved on the first screw rod, and the second brake block is sleeved on the second screw rod.

[0007] According to a fuser with a flexibly adjustable support height provided by the present invention, spline holes penetrating through both ends are provided on both the first screw rod and the second screw rod; Alternatively, the second screw rod is provided with spline holes penetrating through both ends, and the first screw rod is provided with a spline groove extending only through one end thereof, and the notch of the spline groove faces the second screw rod; One end of the adjusting handle is provided with a spline shaft, and the spline shaft can slide between the first screw rod and the second screw rod along the axial direction of the spline hole, for rotating the first screw rod and the second screw rod separately, or rotating the first screw rod and the second screw rod simultaneously.

[0008] According to a fuser with a flexibly adjustable support height provided by the present invention, the guiding seat is provided with guiding strips, the guiding strips extend from the first seat plate to the third seat plate, and the two guiding strips are symmetrically distributed on the upper side and the lower side of the guiding seat; Both the first brake block and the second brake block are provided with guiding grooves adapted to the guiding strips, and the guiding grooves cooperate with the guiding strips to limit the rotational freedom of the first brake block and the second brake block.

[0009] According to a fuser with a flexibly adjustable support height provided by the present invention, two connecting pieces are symmetrically arranged on the left side and the right side of the guiding seat, and the connecting pieces extend from the first seat plate to the third seat plate; A first positioning groove adjacent to the third seat plate is arranged on the inner side of the connecting piece, and a second positioning groove adjacent to the second seat plate is arranged on the outer side of the connecting piece; The flange edge is sequentially provided with a first ratchet tooth, a second ratchet tooth, a third ratchet tooth and a fourth ratchet tooth along its length direction, and the first ratchet tooth and the third ratchet tooth are respectively in plug-in fit with the first positioning groove and the second positioning groove.

[0010] According to a fuser with a flexibly adjustable support height provided by the present invention, a fish-tail-shaped convex block is arranged on one side of the connecting piece in the second positioning groove, and the tip of the fish-tail-shaped convex block is inserted between the second ratchet tooth and the third ratchet tooth and abuts against the side wall of the third ratchet tooth.

[0011] A fusion device with a flexibly adjustable support height provided according to the present invention, the tip angle of the fish-tail bump being smaller than the angle between the adjacent side walls of the second ratchet tooth and the third ratchet tooth.

[0012] A fusion device with a flexibly adjustable support height provided according to the present invention, two third positioning grooves are further provided inside the connecting member for inserting the second ratchet tooth and the fourth ratchet tooth.

[0013] A fusion device with a flexibly adjustable support height provided according to the present invention, the connecting member is detachably connected to the guiding seat, and the connecting member is provided with a first clamping portion, a second clamping portion and a third clamping portion respectively cooperating with the first seat plate, the second seat plate and the third seat plate.

[0014] A fusion device with a flexibly adjustable support height provided according to the present invention, the two sliding grooves are respectively arranged on the second ratchet tooth and the fourth ratchet tooth; The first brake block is provided with a first wedge-shaped protrusion that slidably abuts against the fourth ratchet tooth, and the second brake block is provided with a second wedge-shaped protrusion that slidably abuts against the second ratchet tooth.

[0015] One or more of the above technical solutions in the present invention have at least one of the following technical effects: In the present invention, by providing the independent cooperation of the first screw and the first brake block, and the independent cooperation of the second screw and the second brake block, the two ends of the support end plate can be flexibly supported respectively, realizing the independent control of the heights of the front and rear ends of the fusion device, enabling the fusion device to have a better conforming effect, greatly reducing the trial mold operation during the spinal surgery, thereby reducing the settlement probability of the spine after the surgery and improving the success rate of the surgery.

[0016] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted, and the advantages brought by these technical features of the technical solutions described above, the other technical features of the present invention and the advantages brought by these technical features will be further described in conjunction with the drawings, or understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is an exploded structural schematic diagram of the fusion device provided by the embodiment of the present invention.

[0019] Figure 2 Schematic three-dimensional structure diagram of the guide seat provided by an embodiment of the present invention.

[0020] Figure 3 Schematic three-dimensional structure diagram of the connecting member provided by an embodiment of the present invention.

[0021] Figure 4 Schematic three-dimensional structure diagram of the support end plate provided by an embodiment of the present invention.

[0022] Figure 5 Schematic three-dimensional structure diagram of the first brake block provided by an embodiment of the present invention.

[0023] Reference numerals: 100, linkage mechanism; 110, guide seat; 111, first seat plate; 112, second seat plate; 113, third seat plate; 114, guide bar; 115, connecting member; 1151, first positioning groove; 1152, second positioning groove; 1153, third positioning groove; 1154, fish-tail-shaped convex block; 1155, first clamping portion; 1156, second clamping portion; 1157, third clamping portion; 120, braking assembly; 121, first brake block; 1211, first wedge-shaped convex portion; 122, second brake block; 1221, second wedge-shaped convex portion; 123, guide groove; 130, screw assembly; 131, spline hole; 132, first screw; 133, second screw; 200, support end plate; 210, bottom plate; 220, flange edge; 221, first ratchet tooth; 222, second ratchet tooth; 223, third ratchet tooth; 224, fourth ratchet tooth; 230, sliding groove; 300, adjusting handle; 310, spline shaft. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In an embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0026] As Figure 1 shown, the fusion device mainly includes a linkage mechanism 100, a support end plate 200, and an adjusting handle 300.

[0027] Among them, the linkage mechanism 100 is provided with a guide seat 110, a braking assembly 120, and a screw assembly 130 rotatably embedded in the guide seat 110.

[0028] The two support end plates 200 are symmetrically arranged on both sides of the linkage mechanism 100.

[0029] The screw assembly 130 is provided with a spline hole 131. The adjusting handle 300 can be inserted into the spline hole 131 for rotating the screw assembly 130.

[0030] As Figure 4 shown, a flange edge 220 is respectively arranged on both sides of the bottom plate 210 of the support end plate 200. A sliding groove 230 is respectively provided at both ends of the flange edge 220. The sliding groove 230 extends along a direction inclined to the bottom plate 210.

[0031] The braking assembly 120 includes a first braking block 121 and a second braking block 122 that are threadedly connected to the screw assembly 130. The first braking block 121 and the second braking block 122 are sleeved on the screw assembly 130 at intervals. And, the first braking block 121 and the second braking block 122 are slidably connected to the support end plate 200 through the sliding groove 230.

[0032] The screw assembly 130 includes a through straight rod with threads on the outer peripheral surface and a spline hole 131 on the inner peripheral surface. By rotating the straight rod, the first braking block 121 and the second braking block 122 can be driven to move synchronously in the guide seat 110, thereby simultaneously adjusting the support spacing at both ends of the support end plate 200.

[0033] Further, the screw assembly 130 includes a first screw 132 and a second screw 133, and the central axis of the first screw 132 coincides with the central axis of the second screw 133.

[0034] The guide seat 110 includes a first seat plate 111, a second seat plate 112, and a third seat plate 113 that are arranged at intervals in sequence. Both ends of the first screw 132 are rotatably connected to the first seat plate 111 and the second seat plate 112 respectively. Both ends of the second screw 133 are rotatably connected to the second seat plate 112 and the third seat plate 113 respectively.

[0035] The first braking block 121 is sleeved on the first screw 132. The second braking block 122 is sleeved on the second screw 133.

[0036] In this embodiment, the first screw rod 132 and the first brake block 121 are independently matched, and the second screw rod 133 and the second brake block 122 are independently matched, so that the two ends of the support end plate 200 can be flexibly supported respectively, realizing independent control of the heights of the front and rear ends of the fusion device, enabling the fusion device to have a better conforming effect, greatly reducing the trial die actions during the spinal surgery, thereby reducing the settlement probability of the spine after the surgery and improving the success rate of the surgery.

[0037] Based on the above embodiment, in another embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0038] Both the first screw rod 132 and the second screw rod 133 are provided with spline holes 131 penetrating through both ends thereof.

[0039] Alternatively, the second screw rod 133 is provided with a spline hole 131 penetrating through both ends thereof. The first screw rod 132 is provided with a spline groove extending only through one end thereof. The notch of the spline groove faces the second screw rod 133.

[0040] Correspondingly, one end of the adjusting handle 300 is provided with a spline shaft 310. The spline shaft 310 can slide between the first screw rod 132 and the second screw rod 133 along the axial direction of the spline hole 131 for separately rotating the first screw rod 132, the second screw rod 133, or simultaneously rotating the first screw rod 132 and the second screw rod 133.

[0041] Based on the above embodiment, in another embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0042] As Figure 2 shown, the guide seat 110 is provided with guide bars 114.

[0043] The guide bars 114 extend from the first seat plate 111 to the third seat plate 113, and the two guide bars 114 are symmetrically distributed on the upper side and the lower side of the guide seat 110.

[0044] Both the first brake block 121 and the second brake block 122 are provided with guide grooves 123 adapted to the guide bars 114, and the guide grooves 123 cooperate with the guide bars 114 to limit the rotational freedom of the first brake block 121 and the second brake block 122.

[0045] Based on the above embodiment, in another embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0046] On the left and right sides of the guide seat 110, two connecting members 115 are symmetrically arranged. The connecting member 115 extends from the first seat plate 111 to the third seat plate 113.

[0047] On the inner side of the connecting member 115, a first positioning groove 1151 adjacent to the third seat plate 113 is provided. On the outer side of the connecting member 115, a second positioning groove 1152 adjacent to the second seat plate 112 is provided.

[0048] As Figure 4 shown, along the length direction of the flange edge 220, a first ratchet tooth 221, a second ratchet tooth 222, a third ratchet tooth 223, and a fourth ratchet tooth 224 are sequentially arranged.

[0049] The first ratchet tooth 221 and the third ratchet tooth 223 are respectively inserted and matched with the first positioning groove 1151 and the second positioning groove 1152.

[0050] On the basis of the above embodiment, in another embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0051] As Figure 2 shown, on one side of the second positioning groove 1152 of the connecting member 115, a fish-tail-shaped convex block 1154 is provided.

[0052] The tip of the fish-tail-shaped convex block 1154 is inserted between the second ratchet tooth 222 and the third ratchet tooth 223. And, the fish-tail-shaped convex block 1154 abuts against the side wall of the third ratchet tooth 223 to prevent the support end plate 200 from moving relative to the guide seat 110.

[0053] On the basis of the above embodiment, in another embodiment of the present invention, a fusion device with a flexibly adjustable support height is introduced.

[0054] The included angle at the tip of the fish-tail-shaped convex block 1154 is smaller than the included angle between the adjacent side walls of the second ratchet tooth 222 and the third ratchet tooth 223, so that the support end plate 200 can swing back and forth smoothly on the site.

[0055] Further, two third positioning grooves 1153 are also provided on the inner side of the connecting member 115 for inserting the second ratchet tooth 222 and the fourth ratchet tooth 224.

[0056] Further, as Figure 3 shown, the connecting member 115 is detachably connected to the guide seat 110. The connecting member 115 is provided with a first clamping portion 1155, a second clamping portion 1156, and a third clamping portion 1157 that respectively cooperate with the first seat plate 111, the second seat plate 112, and the third seat plate 113.

[0057] Further, the two sliding grooves 230 are respectively disposed on the second ratchet 222 and the fourth ratchet 224.

[0058] As Figure 1 and Figure 5 shown, the first brake block 121 is provided with a first wedge protrusion 1211 that slidably abuts against the fourth ratchet 224. The second brake block 122 is provided with a second wedge protrusion 1221 that slidably abuts against the second ratchet 222.

[0059] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention 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 cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0061] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0062] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not limited to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fusion device with a flexibly adjustable support height, characterized in that, Comprising: A linkage mechanism (100) provided with a guide seat (110), a braking assembly (120), and a screw assembly (130) rotatably embedded in the guide seat (110); Support end plates (200), with two of the support end plates (200) symmetrically arranged on both sides of the linkage mechanism (100); An adjustment handle (300) for rotating the screw assembly (130); Wherein, on both sides of the bottom plate (210) of the support end plate (200), a flange edge (220) is respectively provided, and at both ends of the flange edge (220), a sliding groove (230) is respectively provided, and the sliding groove (230) extends along a direction inclined to the bottom plate (210); The braking assembly (120) includes a first braking block (121) and a second braking block (122) threadedly connected to the screw assembly (130), the first braking block (121) and the second braking block (122) are sleeved on the screw assembly (130) at intervals and are slidably connected to the support end plate (200) through the sliding groove (230); The screw assembly (130) is provided with a spline hole (131) for inserting the adjustment handle (300).

2. The fuser with a flexibly adjustable support height according to claim 1, characterized in that, The screw assembly (130) includes a first screw (132) and a second screw (133), and the central axis of the first screw (132) coincides with the central axis of the second screw (133); The guide seat (110) includes a first seat plate (111), a second seat plate (112), and a third seat plate (113) arranged at intervals in sequence, both ends of the first screw (132) are rotatably connected to the first seat plate (111) and the second seat plate (112) respectively, and both ends of the second screw (133) are rotatably connected to the second seat plate (112) and the third seat plate (113) respectively; The first braking block (121) is sleeved on the first screw (132), and the second braking block (122) is sleeved on the second screw (133).

3. The fusion device with a flexibly adjustable support height according to claim 2, characterized in that, Both the first screw (132) and the second screw (133) are provided with spline holes (131) penetrating through both ends thereof; Or, the second screw (133) is provided with spline holes (131) penetrating through both ends thereof, and the first screw (132) is provided with a spline groove only extending through one end thereof, and the notch of the spline groove faces the second screw (133); One end of the adjustment handle (300) is provided with a spline shaft (310), and the spline shaft (310) can slide between the first screw (132) and the second screw (133) along the axial direction of the spline hole (131) for separately rotating the first screw (132), the second screw (133), or simultaneously rotating the first screw (132) and the second screw (133).

4. The fuser with a flexibly adjustable support height according to claim 2 or 3, characterized in that, The guide seat (110) is provided with guide bars (114), and the guide bars (114) extend from the first seat plate (111) to the third seat plate (113). The two guide bars (114) are symmetrically distributed on the upper side and the lower side of the guide seat (110); Both the first brake block (121) and the second brake block (122) are provided with guide grooves (123) adapted to the guide bars (114), and the guide grooves (123) cooperate with the guide bars (114) to limit the rotational freedom of the first brake block (121) and the second brake block (122).

5. The fuser with a flexibly adjustable support height according to claim 4, characterized in that, Two connecting members (115) are symmetrically arranged on the left side and the right side of the guide seat (110), and the connecting members (115) extend from the first seat plate (111) to the third seat plate (113); A first positioning groove (1151) adjacent to the third seat plate (113) is arranged on the inner side of the connecting member (115), and a second positioning groove (1152) adjacent to the second seat plate (112) is arranged on the outer side of the connecting member (115); The flange edge (220) is sequentially provided with a first ratchet tooth (221), a second ratchet tooth (222), a third ratchet tooth (223) and a fourth ratchet tooth (224) along its length direction, and the first ratchet tooth (221) and the third ratchet tooth (223) are respectively inserted and matched with the first positioning groove (1151) and the second positioning groove (1152).

6. The fusion device with a flexibly adjustable support height according to claim 5, wherein The connecting member (115) is provided with a fish-tail-shaped convex block (1154) on one side of the second positioning groove (1152), and the tip of the fish-tail-shaped convex block (1154) is inserted between the second ratchet tooth (222) and the third ratchet tooth (223) and abuts against the side wall of the third ratchet tooth (223).

7. The fusion device with a flexibly adjustable support height according to claim 6, characterized in that, The included angle at the tip of the fish-tail-shaped convex block (1154) is smaller than the included angle between the adjacent side walls of the second ratchet tooth (222) and the third ratchet tooth (223).

8. The fuser with a flexibly adjustable support height according to claim 5, characterized in that, Two third positioning grooves (1153) are further arranged on the inner side of the connecting member (115) for inserting the second ratchet tooth (222) and the fourth ratchet tooth (224).

9. The fuser with a flexibly adjustable support height according to claim 5, characterized in that, The connecting member (115) is detachably connected to the guide seat (110), and the connecting member (115) is provided with a first clamping portion (1155), a second clamping portion (1156) and a third clamping portion (1157) respectively cooperating with the first seat plate (111), the second seat plate (112) and the third seat plate (113).

10. The fusion device with a flexibly adjustable support height according to claim 9, wherein, The two sliding grooves (230) are respectively arranged on the second ratchet tooth (222) and the fourth ratchet tooth (224); The first brake block (121) is provided with a first wedge-shaped convex portion (1211) slidingly abutted against the fourth ratchet tooth (224), and the second brake block (122) is provided with a second wedge-shaped convex portion (1221) slidingly abutted against the second ratchet tooth (222).

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