Interbody fusion cage

Abstract

The invention discloses an interbody fusion cage, and relates to the field of surgical instruments. The interbody fusion cage comprises multiple groups of positioning bearing seats, connecting pieces are arranged among the multiple groups of positioning bearing seats, and each positioning bearing seat is provided with a ball seat unit, a fusion cage unit, a bone cement screw and a clamping unit. According to the interbody fusion cage, the design of the positioning bearing seat and the connecting piece is adopted to synchronously bear the multiple sets of fusion cage units, due to the design of the ball seat unit, the multiple sets of fusion cage units freely move on the positioning bearing seat, the multiple sets of fusion cage units can be conveniently and synchronously inserted into the intervertebral disc installation position of a patient, installation is easy, and cost is low. The design of the clamping unit and the bone cement screw is matched, when the bone cement screw is used for fixing the positioning bearing seat and the connecting piece in the bone of a patient, the clamping unit is synchronously driven to lock the movable positions of the ball seat and the positioning ball, and it is guaranteed that the interbody fusion cage is easy and convenient to install, firm in installation and good in stability.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, in particular to an intervertebral fusion device. Background Art

[0002] Intervertebral fusion devices are mainly used to treat spinal degenerative diseases and maintain the stability of vertebral bodies. For example, a patent with publication number CN220141886U discloses an intervertebral fusion device, which belongs to the field of orthopedic implant technology. The intervertebral fusion device includes an upper base plate, a lower base plate, and a support member located between the upper base plate and the lower base plate. The support member is elastic and includes a first porous area, so that the elastic deformation ratio range of the support member is 10-40%.

[0003] Traditional intervertebral fusion devices are usually single-body devices, and one intervertebral fusion device is installed at a damaged intervertebral disc. When a patient has multiple damaged intervertebral discs, this single-body intervertebral fusion device is also split when installed in multiple adjacent intervertebral discs, and each intervertebral fusion device is connected to the bone with screws, and there is no connection between multiple groups of intervertebral fusion devices. This single intervertebral fusion device has few connection points with the bone and low strength. If connecting rods or plates are used to connect multiple groups of intervertebral fusion devices and are simultaneously fixed in the bone with screws, although the problem of fixed points is solved, due to the fixed design of the connecting rods or plates and the intervertebral fusion devices, it will lead to the problem that multiple groups of intervertebral fusion devices are not easy to insert into the installation position of the intervertebral disc due to angle problems when the intervertebral fusion device is installed, thereby making the installation process difficult. In view of the deficiencies of the prior art, the present invention provides an intervertebral fusion device to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intervertebral fusion device, which adopts the design of a positioning bearing seat and a connecting piece to synchronously support multiple groups of fusion device units. Due to the design of the ball seat unit, the multiple groups of fusion device units can move freely at different angles on the positioning bearing seat, thereby facilitating the synchronous insertion of the multiple groups of fusion device units into the patient's intervertebral disc installation position, making the installation simple. In conjunction with the design of a clamping unit and a bone cement screw, when the bone cement screw is used to fix the positioning bearing seat and the connecting piece into the patient's bone, the clamping unit is synchronously driven to lock the active position of the ball seat and the positioning ball, thereby achieving synchronous position limiting of the multiple groups of fusion device units, ensuring that the intervertebral fusion device is easy to install, securely installed, and has good stability.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intervertebral fusion device, comprising a plurality of groups of positioning bearing seats, wherein connecting pieces are arranged between the plurality of groups of positioning bearing seats, and the positioning bearing seats are provided with: A ball seat unit is arranged inside the positioning bearing seat, and the ball seat unit comprises a docking fixing block clamped on the positioning bearing seat, the docking fixing block is provided with a ball seat, and a positioning ball is rotatably connected inside the ball seat; A fusion device unit is arranged on the ball seat unit, and the fusion device unit comprises a fusion device body, and the fusion device body is fixed to the positioning ball; A bone cement screw is arranged inside the positioning bearing seat and the docking fixing block; The clamping unit is arranged in the ball seat unit, and the clamping unit is used to lock the position of the ball seat and the positioning ball when installing the bone cement screw.

[0006] Preferably, the clamping unit comprises a clamping groove provided inside the ball seat and the docking fixing block, and the clamping block is slidably connected inside the clamping groove; A transmission column is fixedly connected to the clamping block, and the transmission column passes through the clamping groove and enters a through hole on the docking fixing block for inserting a bone cement screw.

[0007] Preferably, a gluing assembly is provided on the clamping block, and the gluing assembly includes an annular rubber cylinder fixedly connected to the clamping block, and glue is provided inside the annular rubber cylinder. When the clamping block applies pressure to the annular rubber cylinder to extrude and deform it, the annular rubber cylinder squeezes the internal glue into the inner cavity of the ball seat and the positioning ball to form a gluing connection.

[0008] Preferably, a ball head is fixedly connected to the transmission column, and a spring is fixedly connected between the clamping block and the clamping groove.

[0009] Preferably, the positioning ball is provided with a rough surface area.

[0010] Preferably, an embedding groove is provided on the positioning bearing seat, and the docking fixing block is movably clamped in the embedding groove. A first positioning bolt for fixing the docking fixing block is threadedly connected on the positioning bearing seat.

[0011] Preferably, the positioning bearing seat is provided with a preliminary locking component for quickly limiting the position of the docking fixing block, and the preliminary locking component includes: A second positioning bolt is slidably connected to the interior of the positioning bearing seat, and a preliminary locking hole corresponding to the second positioning bolt is opened on the docking fixing block; A preliminary limiting groove is provided on the positioning bearing seat; An adjusting block is slidably connected in the preliminary limiting groove and fixed with the second positioning bolt; A fixing plate, fixedly connected in the preliminary limiting groove; The lead screw is threadedly connected to the fixed plate and is rotatably connected to the adjusting block.

[0012] Preferably, the positioning ball is fixedly connected with a docking block, the docking block is clamped with a clamping seat, the clamping seat is fixedly connected with a load-bearing elastic steel plate, and the load-bearing elastic steel plate is movably clamped inside the fusion device body and is used to support the fusion device body.

[0013] Preferably, a support member is fixedly connected inside the fusion device body.

[0014] Preferably, a clamping groove is provided on the clamping seat, and a third positioning bolt for locking the position of the docking block is threadedly connected to the clamping seat.

[0015] The present invention discloses an intervertebral fusion cage, which has the following beneficial effects: 1. The intervertebral fusion device adopts the design of a positioning bearing seat and a connecting piece to synchronously support multiple groups of fusion device units. Due to the design of the ball seat unit, the multiple groups of fusion device units can move freely at different angles on the positioning bearing seat, thereby facilitating the synchronous insertion of the multiple groups of fusion device units into the patient's intervertebral disc installation position, making the installation simple. In conjunction with the design of the clamping unit and the bone cement screw, when the bone cement screw is used to fix the positioning bearing seat and the connecting piece to the patient's bone, the clamping unit is synchronously driven to lock the movable position of the ball seat and the positioning ball, thereby achieving synchronous position limiting of the multiple groups of fusion device units, ensuring that the intervertebral fusion device is easy to install, securely installed, and has good stability.

[0016] 2. The intervertebral fusion device is designed with a bonding component to ensure a better limiting effect after the ball seat and the positioning ball are clamped. When the clamping unit is driven by the bone cement screw and the clamping block and the positioning ball are clamped and fixed, the clamping block will simultaneously drive the annular rubber tube and the positioning ball to be squeezed. The annular rubber tube is provided with glue for bonding. When the annular rubber tube is subjected to the squeezing force of the bone cement screw, the internal glue will be squeezed into the inner cavity of the ball seat and the positioning ball when the force is too large, thereby further locking the transmission position of the ball seat and the positioning ball, thereby ensuring that the support and limit of the fusion device body is stable and not easy to loosen.

[0017] 3. The intervertebral fusion device adopts a spring design to apply elastic force to the clamping block, so that the clamping block and the surface of the positioning ball remain in contact. When the bone cement screw is not used to extrude the clamping unit, the clamping block is not prone to shaking or collision inside the clamping groove, thereby avoiding the problem of leakage of the annular rubber cylinder due to collision during the transportation of the device.

[0018] 4. The rough surface area provided on the positioning ball of the intervertebral fusion device can increase the friction force between the clamping block and the positioning ball during contact and extrusion, thereby enhancing the positioning effect of the positioning ball. At the same time, when the glue inside the annular rubber cylinder is discharged, the rough surface area design has better glue bonding strength and stronger adhesion, thereby making the position bonding and fixing effect between the ball seat and the positioning ball better.

[0019] 5. The intervertebral fusion device is provided with a load-bearing elastic steel plate for providing support and fixation for the fusion device body. The load-bearing elastic steel plate has strong rigidity and good elasticity, so that the fusion device body is reinforced and supported, not easy to be excessively deformed, with good strength and elasticity, strong load-bearing capacity, good stability, and suitable for in vivo loading. The fusion device body and support members are supported by elastic materials. The support members are of various models, and the elastic coefficients of each support member are different. Therefore, it is convenient to replace different support members according to the actual stress conditions of the patient, thereby controlling the elastic coefficient of the fusion device body and the support members as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a first viewing angle of the overall structural diagram of the present invention; Figure 2 The second viewing angle of the overall structural diagram of the present invention; Figure 3 This is a disassembly diagram of the bone cement screw of the present invention; Figure 4 This is a disassembled diagram of the docking fixing block of the present invention; Figure 5 A cross-sectional view of a positioning bearing seat of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of part A in the middle; Figure 7 It is a disassembly schematic diagram of the fusion device body of the present invention; Figure 8 It is a structural schematic diagram of the docking block of the present invention; Fig. 9 It is a cross-sectional view of the docking fixing block of the present invention; Fig.10 It is a structural schematic diagram of the positioning ball of the present invention; Fig.11 This is a schematic diagram of disassembling the clamping block of the present invention.

[0022] In the figure: 1. positioning bearing seat; 101. connecting piece; 102. embedding groove; 103. preliminary limiting groove; 2. docking fixing block; 201. preliminary locking hole; 3. ball seat; 301. clamping groove; 302. clamping block; 3021. annular rubber cylinder; 303. transmission column; 3031. ball head; 304. spring; 4. positioning ball; 401. rough surface area; 5. fusion device body; 501. support member; 502. clamping seat; 5021. clamping groove; 5022. third positioning bolt; 503. bearing elastic steel plate; 504. docking block; 6. bone cement screw; 7. first positioning bolt; 8. second positioning bolt; 801. adjustment block; 802. fixing plate; 803. screw rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The embodiment of the present application provides an intervertebral fusion device, which solves the problem that traditional intervertebral fusion devices are usually single-body intervertebral fusion devices, and one intervertebral fusion device is installed at a damaged intervertebral disc position. When a patient has multiple damaged intervertebral discs, this single-body intervertebral fusion device is also separated when installed in multiple adjacent intervertebral discs. Each intervertebral fusion device is connected to the bone with screws, and there is no connection between multiple groups of intervertebral fusion devices. This single intervertebral fusion device has few connection points with the bone and low strength.

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The embodiment of the present invention discloses an intervertebral fusion cage. Figure 1-11 As shown, it comprises a plurality of positioning bearing seats 1, a connecting member 101 is arranged between the plurality of positioning bearing seats 1, and the positioning bearing seats 1 are provided with: The ball seat unit is arranged inside the positioning bearing seat 1, and the ball seat unit comprises a docking fixing block 2 clamped on the positioning bearing seat 1, a ball seat 3 is arranged on the docking fixing block 2, and a positioning ball 4 is rotatably connected inside the ball seat 3; The fusion device unit is arranged on the ball seat unit, and the fusion device unit comprises a fusion device body 5, and the fusion device body 5 is fixed to the positioning ball 4; The intervertebral fusion device adopts the design of the positioning bearing seat 1 and the connecting piece 101 to synchronously carry multiple groups of fusion device units. Due to the design of the ball seat unit, the multiple groups of fusion device units can move freely on the positioning bearing seat 1, so that the multiple groups of fusion device units can be synchronously inserted into the patient's intervertebral disc installation position, making the installation simple. The bone cement screw 6 is arranged inside the positioning bearing seat 1 and the docking fixing block 2; A clamping unit is arranged in the ball seat unit, and is used to lock the position of the ball seat 3 and the positioning ball 4 when installing the bone cement screw 6; The intervertebral fusion device is designed in conjunction with a clamping unit and a bone cement screw 6. When the bone cement screw 6 is used to fix the patient's bone internally, the clamping unit is synchronously driven to lock the active position of the ball seat 3 and the positioning ball 4, thereby achieving synchronous position limiting of multiple groups of fusion device units, ensuring that the intervertebral fusion device is easy to install, securely installed, and has good stability.

[0027] Specifically, the clamping unit includes a clamping groove 301 provided inside the ball seat 3 and the docking fixing block 2, and a clamping block 302 is slidably connected inside the clamping groove 301; The clamping block 302 is fixedly connected with a transmission column 303, which passes through the clamping groove 301 and enters into a through hole on the docking fixing block 2 for inserting a bone cement screw 6; When the bone cement screw 6 passes through the through hole of the docking fixing block 2, the bone cement screw 6 will squeeze the transmission column 303, thereby pushing the transmission column 303 to move, so that the transmission column 303 drives the clamping block 302 to move, and the clamping block 302 is used to clamp and limit the side wall of the positioning ball 4, so that the position between the positioning ball 4 and the ball seat 3 is clamped, thereby realizing the clamping and positioning of the fusion device body 5, and achieving stable installation of the fusion device body 5.

[0028] Furthermore, a gluing assembly is provided on the clamping block 302, and the gluing assembly includes an annular rubber cylinder 3021 fixedly connected to the clamping block 302, and glue is provided inside the annular rubber cylinder 3021. When the clamping block 302 applies pressure to the annular rubber cylinder 3021 to extrude and deform, the annular rubber cylinder 3021 squeezes the internal glue into the inner cavity of the ball seat 3 and the positioning ball 4 to form a gluing connection; When the clamping unit is driven by the bone cement screw 6 and the clamping block 302 and the positioning ball 4 are clamped and fixed, the clamping block 302 will synchronously drive the annular rubber cylinder 3021 to be squeezed with the positioning ball 4. The annular rubber cylinder 3021 is provided with glue for bonding. When the annular rubber cylinder 3021 is subjected to the squeezing force of the bone cement screw 6, when the force is too large, the internal glue will be squeezed into the inner cavity of the ball seat 3 and the positioning ball 4, thereby further locking the transmission position of the ball seat 3 and the positioning ball 4, thereby ensuring that the support limit of the fusion device body 5 is stable and not easy to loosen.

[0029] A ball head 3031 is fixedly connected to the transmission column 303, and a spring 304 is fixedly connected between the clamping block 302 and the clamping groove 301. The spring 304 is designed to apply elastic force to the clamping block 302, so that the clamping block 302 and the surface of the positioning ball 4 remain in contact. When the bone cement screw 6 is not used to extrude the clamping unit, the clamping block 302 is not prone to shaking or colliding inside the clamping groove 301, thereby avoiding the problem of leakage of the annular rubber cylinder 3021 due to collision during the transportation of the device. The ball head 3031 is arranged to facilitate the transmission column 303 to be subjected to the extrusion force of the bone cement screw 6 to drive the transmission column 303 and the clamping block 302 to move.

[0030] Furthermore, a rough surface area 401 is provided on the positioning ball 4. The rough surface area 401 provided on the positioning ball 4 can increase the friction force when the clamping block 302 and the positioning ball 4 are in contact and squeezed, thereby enhancing the positioning effect of the positioning ball 4. At the same time, when the glue inside the annular rubber cylinder 3021 is discharged, due to the design of the rough surface area 401, the glue bonding strength is better and the adhesion is stronger, thereby making the position bonding and fixing effect between the ball seat 3 and the positioning ball 4 better.

[0031] An embedding groove 102 is provided on the positioning bearing seat 1, and the docking fixing block 2 is movably clamped in the embedding groove 102. The positioning bearing seat 1 is threadedly connected with a first positioning bolt 7 for fixing the docking fixing block 2. The device adopts the design of the embedding groove 102, which is convenient for clamping the positioning bearing seat 1 and the docking fixing block 2. After clamping, the design of the first positioning bolt 7 facilitates the position locking of the docking fixing block 2.

[0032] Furthermore, the positioning bearing seat 1 is provided with a preliminary locking component for quickly limiting the position of the docking fixing block 2, and the preliminary locking component includes: The second positioning bolt 8 is slidably connected to the interior of the positioning bearing seat 1, and a preliminary locking hole 201 corresponding to the second positioning bolt 8 is opened on the docking fixing block 2; A preliminary limiting groove 103 is provided on the positioning bearing seat 1; The adjusting block 801 is slidably connected in the preliminary limiting groove 103 and fixed with the second positioning bolt 8; The fixing plate 802 is fixedly connected in the preliminary limiting groove 103; The screw rod 803 is threadedly connected to the fixing plate 802 and is rotatably connected to the adjusting block 801; The device adopts the design of preliminary locking components, which facilitates the realization of the preliminary quick locking of the positioning bearing seat 1 and the docking fixing block 2 when the positioning bearing seat 1 and the docking fixing block 2 are connected, and on the other hand, cooperates with the first positioning bolt 7 to form a multi-point stable fixation of the docking fixing block 2; When using the preliminary locking assembly to lock the positioning bearing seat 1 and the docking fixing block 2, firstly clamp the positioning bearing seat 1 and the docking fixing block 2, and then rotate the screw rod 803 to make the screw rod 803 drive the adjustment block 801 to move, and the adjustment block 801 drives multiple groups of second positioning bolts 8 to move, so that multiple groups of second positioning bolts 8 are inserted into the preliminary locking hole 201 at the same time, so that the docking fixing block 2 is preliminarily locked and fixed.

[0033] Furthermore, the positioning ball 4 is fixedly connected with a docking block 504, the docking block 504 is clamped with a clamping seat 502, the clamping seat 502 is provided with a clamping groove 5021, and the clamping seat 502 is threadedly connected with a third positioning bolt 5022 for locking the position of the docking block 504; The clamping seat 502 is fixedly connected with a load-bearing elastic steel plate 503, which is movably clamped inside the fusion device body 5 and used to bear the load on the fusion device body 5. The load-bearing elastic steel plate 503 is used to provide support and fixation for the fusion device body 5. The load-bearing elastic steel plate 503 has strong rigidity and good elasticity, so that the fusion device body 5 is reinforced and supported, not prone to excessive deformation, good strength and elasticity, strong load-bearing capacity, good stability, and suitable for loading in the body; The docking block 504 and the card seat 502 provided in the device are designed with a card slot 5021 for easy docking, and are locked by a third positioning bolt 5022 after docking, thereby facilitating the installation of the fusion device body 5, the support member 501, the card seat 502 and the load-bearing elastic steel plate 503.

[0034] Furthermore, a support member 501 is fixedly connected to the inside of the fusion device body 5. The fusion device body 5 and the support member 501 are both supported by elastic materials. The support members 501 are of various models, and each support member 501 has a different elastic coefficient. Therefore, it is convenient to replace different support members 501 according to the actual stress conditions of the patient, thereby controlling the overall elastic coefficient of the fusion device body 5 and the support member 501.

[0035] When the intervertebral fusion cage is used: Step S1: Selecting an appropriate number of positioning bearing seats 1 according to the number of damaged intervertebral discs; Step S2: loading the docking fixing block 2 on the positioning bearing seat 1; Step S3: docking the clamping seat 502 and the docking block 504, thereby loading the load-bearing elastic steel plate 503 and the fusion device body 5 on the positioning ball 4; Step S4: aligning the multiple fusion device bodies 5 with the patient's intervertebral disc and inserting them. During the insertion process, the multiple fusion device bodies 5 are automatically adjusted and embedded inside, while driving the positioning balls 4 to rotate inside the ball seats 3; Step S5: After the multiple groups of fusion device bodies 5 are embedded in place, bone cement screws 6 are used to pass through the docking fixing block 2 and the positioning bearing seat 1 and are tightened and fixed in the patient's bone; Step S6: During the screwing process of the bone cement screw 6, the clamping unit is driven to clamp and limit the positioning ball 4, thereby limiting the angle and position of the fusion device body 5; Step S7: When the clamping unit clamps and limits the positioning ball 4, the adhesive component is squeezed synchronously, so that the glue inside the adhesive component is squeezed out and the ball seat 3 and the positioning ball 4 are further limited.

[0036] In summary, the intervertebral fusion device is easy to use, has good stability, and is suitable for popularization and use.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An intervertebral fusion device, comprising a plurality of positioning bearing seats (1), characterized in that: Connecting pieces (101) are provided between the plurality of groups of positioning bearing seats (1), and the positioning bearing seats (1) are provided with: A ball seat unit is arranged inside the positioning bearing seat (1), the ball seat unit comprises a docking fixing block (2) clamped on the positioning bearing seat (1), a ball seat (3) is provided on the docking fixing block (2), and a positioning ball (4) is rotatably connected inside the ball seat (3); A fusion device unit is arranged on the ball seat unit, the fusion device unit comprises a fusion device body (5), and the fusion device body (5) is fixed to the positioning ball (4); A bone cement screw (6) is arranged inside the positioning bearing seat (1) and the docking fixing block (2); A clamping unit is arranged in the ball seat unit, and is used to lock the position of the ball seat (3) and the positioning ball (4) when installing the bone cement screw (6).

2. The intervertebral fusion cage according to claim 1, characterized in that: The clamping unit comprises a clamping groove (301) formed inside the ball seat (3) and the docking fixing block (2), and a clamping block (302) is slidably connected inside the clamping groove (301); The clamping block (302) is fixedly connected to a transmission column (303), and the transmission column (303) passes through the clamping groove (301) and enters a through hole on the docking fixing block (2) for inserting a bone cement screw (6).

3. The intervertebral fusion cage according to claim 2, characterized in that: The clamping block (302) is provided with a bonding component, the bonding component comprising an annular rubber cylinder (3021) fixedly connected to the clamping block (302), the annular rubber cylinder (3021) having glue inside, and when the clamping block (302) applies pressure to the annular rubber cylinder (3021) to extrude and deform, the annular rubber cylinder (3021) squeezes the internal glue into the inner cavity of the ball seat (3) and the positioning ball (4) to form a bonding connection.

4. The intervertebral fusion cage according to claim 3, characterized in that: A ball head (3031) is fixedly connected to the transmission column (303), and a spring (304) is fixedly connected between the clamping block (302) and the clamping groove (301).

5. The intervertebral fusion cage according to claim 4, characterized in that: The positioning ball (4) is provided with a rough surface area (401).

6. The intervertebral fusion cage according to claim 1, characterized in that: The positioning bearing seat (1) is provided with an embedding groove (102), the docking fixing block (2) is movably clamped in the embedding groove (102), and the positioning bearing seat (1) is threadedly connected with a first positioning bolt (7) for fixing the docking fixing block (2).

7. The intervertebral fusion cage according to claim 6, characterized in that: The positioning bearing seat (1) is provided with a preliminary locking component for quickly limiting the position of the docking fixing block (2), and the preliminary locking component comprises: A second positioning bolt (8) is slidably connected to the interior of the positioning bearing seat (1), and a preliminary locking hole (201) corresponding to the second positioning bolt (8) is provided on the docking fixing block (2); A preliminary limiting groove (103) is provided on the positioning bearing seat (1); An adjusting block (801) is slidably connected in the preliminary limiting groove (103) and fixed to the second positioning bolt (8); A fixed plate (802) fixedly connected in the preliminary limiting groove (103); The screw rod (803) is threadedly connected to the fixing plate (802) and is rotationally connected to the adjusting block (801).

8. The intervertebral fusion cage according to claim 1, characterized in that: The positioning ball (4) is fixedly connected to a docking block (504), the docking block (504) is clamped to a clamping seat (502), the clamping seat (502) is fixedly connected to a load-bearing elastic steel plate (503), and the load-bearing elastic steel plate (503) is movably clamped inside the fusion device body (5) and is used to support the fusion device body (5).

9. The intervertebral fusion cage according to claim 8, characterized in that: A support member (501) is fixedly connected inside the fusion device body (5).

10. The intervertebral fusion cage according to claim 8, characterized in that: The clamping seat (502) is provided with a clamping slot (5021), and the clamping seat (502) is threadedly connected with a third positioning bolt (5022) for locking the position of the docking block (504).

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