Intervertebral fusion cage uniform speed limiting implantation device

Abstract

The present invention relates to the field of medical device technology, and in particular to a device for uniform speed limiting implantation of an intervertebral fusion device. The device for uniform speed limiting implantation of an intervertebral fusion device comprises a main body, blades, a blade opening and closing control mechanism, a screw, a handle, an inner rod, a knob, a screw control mechanism and a fusion device connecting block. One end of the main body is symmetrically hinged with blades along its cavity, and a blade opening and closing control mechanism capable of limiting the opening and closing of the blades is provided on the main body on one side of the blade; a handle is installed at one end of the screw, a knob is provided at the beginning of the inner rod, the inner rod passes through the inner cavity of the screw, a thread capable of being connected to the fusion device is provided at the end of the inner rod, and the end of the screw away from the handle passes through the cavity of the main body and extends between the two blades; a screw control mechanism is installed on the main body; a fusion device connecting block is slidably provided between the upper and lower blades, and the end of the inner rod is threadedly connected to the fusion device. The structural design of the present invention is simple, and it is convenient to control the implantation speed and implantation trajectory of the intervertebral fusion device, and can achieve uniform speed implantation.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a uniform speed limiting implantation device for an intervertebral fusion device. Background Art

[0002] Spinal diseases are mostly caused by long-term incorrect posture, sports injuries, or deterioration of body functions with aging. However, when the intervertebral disc is excessively damaged, the two adjacent vertebrae will be abnormally close together and compress the surrounding nerves to produce severe pain, causing the patient to have trouble in movement and require surgical treatment. The most commonly used surgical method is intervertebral fusion, which uses special surgical instruments through surgical incisions to complete the implantation and fixation of the intervertebral fusion device.

[0003] The intervertebral fusion device requires an implantation tool during implantation, and the existing intervertebral fusion device implantation device still has some deficiencies in structural design. For example, the Chinese patent CN106073950B authorization announcement discloses an implantation instrument for spinal fusion surgery, which includes an instrument body, a clamping assembly, a first control assembly, and a second control assembly. The movement of the first control assembly can cause the first connecting member and the second connecting member of the clamping assembly to produce a dislocation movement, thereby changing the clamping angle of the intervertebral fusion device, and the second control assembly can be operated to allow the first clamping member and the second clamping member of the clamping assembly to smoothly detach from the locating pin of the intervertebral fusion device. The above-mentioned type of implantation tool has a complex structural design, making it difficult to control the implantation speed of the intervertebral fusion device, and the locking and unlocking operations of the intervertebral fusion device are inconvenient. Summary of the invention

[0004] The purpose of the present invention is to provide a uniform speed and limited position implantation device for an intervertebral fusion device, which overcomes the shortcomings of the aforementioned prior art, has a simple structural design, is easy to operate, is convenient for controlling the implantation speed and implantation trajectory of the intervertebral fusion device, can achieve uniform speed implantation and rapid implantation, and is easy to lock and unlock the intervertebral fusion device.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] An intervertebral fusion device with uniform speed and limited position implantation comprises a main body, blades, a blade opening and closing control mechanism, a screw, a handle, an inner rod, a knob, a screw control mechanism and a fusion device connection block, wherein:

[0007] The main body is a cavity structure, one end of the main body is symmetrically hinged with leaves along the cavity, the two leaves can be opened and closed, and a leaf opening and closing control mechanism capable of limiting the opening and closing of the leaves is provided on the main body on one side of the leaves. When the two leaves are opened, it is convenient to install a fusion device connection block of a suitable size. After the fusion device connection block is installed, the leaves are reset and the leaf opening and closing control mechanism is used to limit the leaves from opening, and the gap between the leaves provides an implantation channel for the intervertebral fusion device.

[0008] The screw is a hollow structure, a handle is installed at one end of the screw, a knob is arranged at the beginning of the inner rod, the inner rod passes through the inner cavity of the screw, a thread that can be connected to the fusion device is arranged at the end of the inner rod, and the end of the screw away from the handle passes through the cavity of the main body and extends between the two blades. The movement of the screw drives the fusion device to move, and the fusion device drives the inner rod to move synchronously.

[0009] The main body is provided with a screw control mechanism capable of controlling the advancement speed of the screw, and the screw control mechanism has two use modes: in the first use mode, the screw control mechanism is threadedly connected to the screw, and the screw can be advanced at a uniform speed when the handle is turned, so that the intervertebral fusion device is implanted at a uniform speed and limited position under the limit position of the blade; in the second use mode, the screw control mechanism does not contact the screw, and the screw can quickly promote the implantation of the intervertebral fusion device under the limit position of the blade;

[0010] The blades are provided with a slideway, and a fusion device connection block is slidably provided on the slideway between the upper and lower blades. The fusion device connection block holds the fusion device, and the end of the inner rod passes through the fusion device connection block and is threadedly connected to the fusion device.

[0011] Before use, first open the two leaves, slide the fusion device connecting block between the two leaves, and then use the leaf opening and closing control mechanism to limit the position of the leaves so that they cannot open, forming a stable intervertebral fusion device guide channel, and hold the intervertebral fusion device through the fusion device connecting block to play a limiting role, and then thread the inner rod to the intervertebral fusion device, and the end of the screw rod contacts the fusion device connecting block, and the end of the leaf is inserted between the two vertebrae that are mainly implanted with the intervertebral fusion device, and the screw rod is rotated, and it rotates forward at a nearly uniform speed with the cooperation of the screw rod control mechanism, pushing the fusion device connecting block forward, and then pushing the intervertebral fusion device to be completely implanted. After the intervertebral fusion device is implanted, the inner rod is rotated in the opposite direction to make the inner rod detach from the intervertebral fusion device, and the intervertebral fusion device uniform speed limiting implantation device is removed.

[0012] Furthermore, the outer wall of the main body is symmetrically provided with a first groove along its cavity, a first opening is provided below the starting end of the first groove, the starting end of the blade is hinged in the first groove above the first opening, and when the two blades are opened, the first opening is a accommodating space for the starting end of the blade.

[0013] Furthermore, a second groove is provided on one side of the first groove, and a blade opening and closing control mechanism is installed in the second groove. The blade opening and closing control mechanism includes a first spring and a blade switch block. One end of the first spring is fixedly connected to the inner wall of the second groove, and the other end is connected to the starting end of the blade switch block. The end of the blade switch block is inserted into the side of the blade close to the bottom of the first groove under the push of the first spring, and the blade is clamped by the end of the blade switch block, so that the two blades cannot open relative to each other, forming a stable intervertebral fusion channel. When the blade switch block is manually retracted, the first spring is compressed, and the end of the blade switch block is pulled out from the lower end of the blade, so that the two blades can freely open relative to each other.

[0014] Furthermore, a slot matching the end of the leaf switch block is provided on the end surface of the leaf close to the bottom of the first groove, thereby enhancing the limiting stability of the leaf switch block on the leaf.

[0015] Furthermore, the blade is elastic; the outer wall of the blade is provided with a first elongated hole matching with the fusion device connecting block, and the first elongated hole is provided with an opening for installing the fusion device connecting block at one end close to the main body; the outer wall of the blade is provided with a limiting block that can be stuck on the lumbar vertebra, and when in use, the limiting block is used as a fulcrum to limit the insertion depth of the blade between the vertebrae.

[0016] Furthermore, one design scheme of the screw control mechanism is: the screw control mechanism includes a second spring, a button, a pin and a first thread tooth, a button movable groove is opened on the main body, one end of the second spring is connected to the bottom of the button movable groove, the other end of the second spring is connected to the button, the button is located in the button movable groove, the button is a cavity structure, the inner cavity of the button is provided with a first thread tooth matching the thread of the screw, the screw passes through the button, and under the action of the spring, the first thread tooth abuts against the screw, at this time the screw cannot be quickly advanced, and can only be advanced at a nearly uniform speed by rotating, when the button is pressed, the first spring is compressed, and the first thread tooth disengages from the screw, at this time the screw can be quickly advanced, a long through hole is opened on the button, the pin passes through the long through hole, both ends of the pin are fixed on the main body, and the main function of the pin and the long through hole is to provide guidance for the process of pressing the button.

[0017] Furthermore, another design scheme of the screw control mechanism is: the screw control mechanism includes a shell, a first slider, a third spring, a threaded tooth block and a first slider pin, the main body is provided with a shell mounting groove, the shell is arranged in the shell mounting groove, the shell is provided with a screw through hole, the shell is also provided with a first slider mounting groove, the first slider mounting groove is connected to the screw through hole, one end of the first slider mounting groove is connected to one end of the third spring, the other end of the third spring is connected to the first slider, the end of the first slider facing the screw mounting groove is provided with a threaded tooth block movable hole, and the two side walls of the threaded tooth block movable hole are Both are provided with inclined sliding holes, the threaded tooth block includes a transverse block and a second threaded tooth installed on the end surface of the transverse block facing the screw, the threaded tooth block is installed in the movable hole of the threaded tooth block, and the threaded tooth block is provided with a first slider column pin extending into the sliding hole. Under the push of the second spring, the first slider column pin is located at the lower end of the sliding hole. At this time, the second threaded tooth abuts against the screw, and the screw cannot be quickly advanced at this time, and can only be advanced at a nearly uniform speed by rotating. When the first slider is retracted, the second spring is compressed, the threaded tooth block moves up along the inclined sliding hole, and the second threaded tooth disengages from the screw, and the screw can be quickly advanced.

[0018] Furthermore, the first slider is provided with an outwardly protruding pushing end to facilitate the retraction of the first slider.

[0019] Furthermore, the connecting block includes a connecting block body, a clamping claw and a second slider. The connecting block body is provided with a clamping groove that can be clamped with a screw rod and a through hole that can pass through an inner rod. The connecting block body is provided with a second slider that cooperates with the first long hole on the blade. An elastic clamping claw is provided at one end of the connecting block body close to the fusion device. The clamping claw can hold the intervertebral fusion device but the clamping force is not strong, which is convenient for removal. Depending on the model of the intervertebral fusion device, multiple connecting blocks can be provided.

[0020] Furthermore, the second sliding block has a "T"-shaped structure.

[0021] The beneficial effects of the present invention are as follows: compared with the prior art, the intervertebral fusion device of the present invention has the following advantages: simple structural design, convenient operation, easy to control the implantation speed and implantation trajectory of the intervertebral fusion device, able to achieve uniform and rapid implantation, convenient locking and unlocking of the intervertebral fusion device, before use, first open the two leaves, slide the fusion device connection block between the two leaves, then limit the position of the leaves through the leaf opening and closing control mechanism so that it cannot be opened, forming a stable intervertebral fusion device guide channel, hold the intervertebral fusion device through the fusion device connection block, play a limiting role, then the inner rod is threadedly connected to the intervertebral fusion device, the end of the screw rod abuts against the fusion device connection block, the end of the blade is inserted between the two vertebrae mainly implanted with the intervertebral fusion device, the screw rod is rotated, and with the cooperation of the screw rod control mechanism, it rotates forward at a nearly uniform speed, pushes the fusion device connection block forward, and then pushes the intervertebral fusion device to be completely implanted, and after the intervertebral fusion device is implanted, the inner rod is rotated in the opposite direction so that the inner rod is separated from the intervertebral fusion device and removed from the intervertebral fusion device uniform speed limiting implantation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0023] Figure 2 It is a schematic top view of the overall structure of Example 1 of the present invention;

[0024] Figure 3 For the present invention Figure 2 A-A' cross-sectional view;

[0025] Figure 4 It is a structural schematic diagram of the main body, the blade opening and closing control mechanism, and the screw control mechanism of Example 1 of the present invention;

[0026] Figure 5 It is a schematic cross-sectional view of the structure of the main body, the blade opening and closing control mechanism, and the screw control mechanism of Example 1 of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the fusion device connection block according to Embodiment 1 of the present invention;

[0028] Figure 7 This is a schematic structural diagram of the fusion device connection block from another angle according to Embodiment 1 of the present invention;

[0029] Figure 8 This is a schematic diagram of the overall structure of Example 2 of the present invention;

[0030] Fig. 9 It is a three-dimensional structural schematic diagram of the main body, blade opening and closing control mechanism, and screw control mechanism of Example 2 of the present invention;

[0031] Fig.10It is a schematic top view of the structure of the main body, the blade opening and closing control mechanism, and the screw control mechanism of Example 2 of the present invention;

[0032] Fig.11 For the present invention Fig.10 B-B' structural cross-sectional view;

[0033] Fig.12 It is a schematic diagram of the structure explosion of the main body, the blade opening and closing control mechanism, and the screw control mechanism of the present invention;

[0034] Among them, 1 is a main body, 101 is a first groove, 102 is a first opening, 103 is a second groove, 104 is a button movable groove, 105 is a shell mounting groove, 2 blades, 201 is a first long hole, 202 is an opening, 203 is a limit block, 3 is a blade opening and closing control mechanism, 301 is a first spring, 302 is a blade switch block, 4 screws, 5 handles, 6 inner rods, 7 knobs, 8 screw control mechanism, 801 is a second spring, 802 buttons, 803 pins, 804 are first threaded teeth, 805 shell, 806 is a first slider, 807 is a third spring, 808 is a first slider pin, 809 is a first slider mounting groove, 810 is a threaded tooth block movable hole, 811 is a sliding hole, 812 is a transverse block, 813 is a second threaded tooth, 814 is a screw through hole, 9 is a fusion device connecting block, 901 is a connecting block main body, 902 is a clamping claw, 903 is a second slider, 904 is a through hole, and 905 is a slot. DETAILED DESCRIPTION

[0035] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] Example 1

[0037] like Figure 1-7 In the embodiment shown, a device for uniform speed and limited position implantation of an intervertebral fusion device comprises a main body 1, blades 2, a blade opening and closing control mechanism 3, a screw 4, a handle 5, an inner rod 6, a knob 7, a screw control mechanism 8 and a fusion device connection block 9, wherein:

[0038] The main body 1 is a hollow structure, and one end of the main body 1 is symmetrically hinged with blades 2 along the cavity, and the two blades 2 can be opened and closed. A blade opening and closing control mechanism 3 capable of limiting the opening and closing of the blades 2 is provided on the main body 1 on one side of the blades 2. When the two blades 2 are opened, it is convenient to install a fusion device connection block 9 of a suitable size. After the fusion device connection block 9 is installed, the blades 2 are reset and the blade opening and closing control mechanism 3 is used to limit the blades 2 from opening, and the gap between the blades 2 provides an implantation channel for the intervertebral fusion device.

[0039] The screw rod 4 is a hollow structure, a handle 5 is installed at one end of the screw rod 4, a knob 7 is arranged at the beginning of the inner rod 6, the inner rod 6 passes through the inner cavity of the screw rod 4, the end of the inner rod 6 is arranged with a thread that can be connected to the fusion device, and the end of the screw rod 4 away from the handle 5 passes through the cavity of the main body 1 and extends between the two blades 2. The movement of the screw rod 4 drives the fusion device to move, and the fusion device drives the inner rod 6 to move synchronously;

[0040] The main body 1 is provided with a screw control mechanism 8 capable of controlling the advancement speed of the screw 4. The screw control mechanism 8 has two usage modes: in the first usage mode, the screw control mechanism 8 is threadedly connected to the screw 4, and the screw 4 can be advanced at a uniform speed when the handle 5 is screwed, so that the intervertebral fusion device is implanted at a uniform speed and limited under the limitation of the blade 2; in the second usage mode, the screw control mechanism 8 does not contact the screw 4, and the screw 4 can quickly promote the implantation of the intervertebral fusion device under the limitation of the blade 2;

[0041] The blades 2 are provided with a slideway, and a fusion device connection block 9 is slidably provided on the slideway between the upper and lower blades 2. The fusion device connection block 9 holds the fusion device, and the end of the inner rod 6 passes through the fusion device connection block 9 and is threadedly connected to the fusion device.

[0042] Before use, first open the two leaves 2, slide the fusion device connecting block 9 between the two leaves 2, and then limit the position of the leaves 2 by the leaf opening and closing control mechanism 3 so that they cannot be opened, forming a stable intervertebral fusion device guide channel, and hold the intervertebral fusion device by the fusion device connecting block 9 to play a limiting role, and then thread the inner rod 6 with the intervertebral fusion device, and the end of the screw 4 abuts against the fusion device connecting block 9, and the end of the blade 2 is inserted between the two vertebrae of the main implanted intervertebral fusion device, and the screw 4 is rotated and rotated forward at a nearly uniform speed with the cooperation of the screw control mechanism 8, pushing the fusion device connecting block 9 forward, and then pushing the intervertebral fusion device to be completely implanted. After the intervertebral fusion device is implanted, the inner rod 6 is rotated in the opposite direction to make the inner rod 6 detach from the intervertebral fusion device and remove the intervertebral fusion device uniform speed limiting implantation device.

[0043] In this embodiment, the outer wall of the main body 1 is symmetrically provided with a first groove 101 along its cavity, and a first opening 102 is provided below the starting end of the first groove 101. The starting end of the blade 2 is hinged in the first groove 101 above the first opening 102. When the two blades 2 are opened, the first opening 102 is a accommodating space for the starting end of the blade 2.

[0044] In this embodiment, a second groove 103 is opened on one side of the first groove 101, and a blade opening and closing control mechanism 3 is installed in the second groove 103. The blade opening and closing control mechanism 3 includes a first spring 301 and a blade switch block 302. One end of the first spring 301 is fixedly connected to the inner wall of the second groove 103, and the other end is connected to the starting end of the blade switch block 302. The end of the blade switch block 302 is inserted into the side of the blade 2 close to the bottom of the first groove 101 under the push of the first spring 301, and the blade 2 is clamped by the end of the blade switch block 302, so that the two blades 2 cannot open relative to each other, forming a stable intervertebral fusion channel. When the blade switch block 302 is manually retracted, the first spring 301 is compressed, and the end of the blade switch block 302 is pulled out from the lower end of the blade 2, so that the two blades 2 can freely open relative to each other.

[0045] In this embodiment, a slot matching the end of the leaf switch block 302 is provided on the end surface of the leaf 2 close to the bottom of the first groove 101 , thereby enhancing the limiting stability of the leaf switch block 302 on the leaf 2 .

[0046] In this embodiment, the blade 2 is elastic; the outer wall of the blade 2 is provided with a first elongated hole 201 which cooperates with the fusion device connecting block 9, and the first elongated hole 201 is provided with an opening 202 for installing the fusion device connecting block 9 at one end close to the main body 1; the outer wall of the blade 2 is provided with a limiting block 203 which can be stuck on the lumbar vertebra, and when in use, the limiting block 203 is used as a fulcrum to limit the insertion depth of the blade 2 between the vertebrae.

[0047] In this embodiment, the screw control mechanism 8 includes a second spring 801, a button 802, a pin 803 and a first thread tooth 804. The main body 1 is provided with a button movable groove 104. One end of the second spring 801 is connected to the bottom of the button movable groove 104. The other end of the second spring 801 is connected to the button 802. The button 802 is located in the button movable groove 104. The button 802 is a cavity structure. The inner cavity of the button 802 is provided with a first thread tooth 804 that matches the thread of the screw 4. The screw 4 passes through the button 802. Under the action of the second spring, the first thread tooth 804 contacts the screw rod 4. At this time, the screw rod 4 cannot be quickly advanced, and can only be advanced at a nearly uniform speed by rotating. When the button 802 is pressed, the first spring 301 is compressed, and the first thread tooth 804 is disengaged from the screw rod 4. At this time, the screw rod 4 can be quickly advanced. A long through hole is provided on the button 802, and the pin 803 passes through the long through hole. Both ends of the pin 803 are fixed on the main body 1. The main function of the pin 803 and the long through hole is to provide a guide for the process of pressing the button 802.

[0048] In this embodiment, the fusion device connecting block 9 includes a connecting block body 901, a clamping claw 902 and a second slider 903. The connecting block body 901 is provided with a slot 905 that can be engaged with the screw 4 and a through hole 904 that can pass the inner rod 6. The connecting block body 901 is provided with a second slider 903 that matches the first long hole 201 on the blade 2. An elastic clamping claw 902 is provided at one end of the connecting block body 901 close to the fusion device. The clamping claw 902 can hold the intervertebral fusion device but the clamping force is not strong, which is convenient for removal. According to different models of intervertebral fusion devices, multiple fusion device connecting blocks can be provided; the second slider 903 is in a "T"-shaped structure.

[0049] Example 2

[0050] This embodiment is basically the same as embodiment 1, except that: Figure 8-12 As shown, in this embodiment, the screw control mechanism 8 adopts another design scheme: the screw control mechanism 8 includes a shell 805, a first slider 806, a third spring 807, a threaded tooth block and a first slider pin 808, the main body 1 is provided with a shell mounting groove 105, the shell 805 is arranged in the shell mounting groove 105, the shell 805 is provided with a screw through hole 814, the shell 805 is also provided with a first slider mounting groove 809, the first slider mounting groove 809 is communicated with the screw through hole 814, one end of the first slider mounting groove 809 is connected to one end of the third spring 807, the other end of the third spring 807 is connected to the first slider 806, the end of the first slider 806 facing the screw 4 mounting groove is provided with a threaded tooth block movable hole 810, and the two side walls of the threaded tooth block movable hole 810 are provided with inclined The sliding hole 811, the threaded tooth block includes a transverse block 812 and a second threaded tooth 813 installed on the end face of the transverse block 812 facing the screw rod 4, the threaded tooth block is installed in the threaded tooth block movable hole 810, and the threaded tooth block is provided with a first slider pin 808 extending into the sliding hole 811. Under the push of the second spring 801, the first slider pin 808 is located at the lower end of the sliding hole 811. At this time, the second threaded tooth 813 abuts against the screw rod 4. At this time, the screw rod 4 cannot be quickly advanced, and can only be advanced at a nearly uniform speed by rotating. When the first slider 806 is retracted, the second spring 801 is compressed, the threaded tooth block moves up along the inclined sliding hole 811, and the second threaded tooth 813 disengages from the screw rod 4. At this time, the screw rod 4 can be quickly advanced; the first slider 806 is provided with an outwardly protruding pushing end to facilitate the retraction of the first slider 806.

[0051] The above-mentioned specific implementations are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific implementations. Any appropriate changes or modifications made to them by ordinary technicians in the technical field that conform to the claims of the present invention shall fall within the patent protection scope of the present invention.

Claims

1. A device for uniform speed limiting implantation of an intervertebral fusion cage, characterized in that: It includes a main body, blades, a blade opening and closing control mechanism, a screw, a handle, an inner rod, a knob, a screw control mechanism and a fusion device connection block, wherein: The main body is a cavity structure, one end of the main body is symmetrically hinged with blades along the cavity, the two blades can be opened and closed, and a blade opening and closing control mechanism capable of limiting the opening and closing of the blades is provided on the main body on one side of the blade; The screw is a hollow structure, a handle is installed at one end of the screw, a knob is arranged at the beginning of the inner rod, the inner rod passes through the inner cavity of the screw, a thread that can be connected to the fusion device is arranged at the end of the inner rod, and the end of the screw away from the handle passes through the cavity of the main body and extends between the two blades; The main body is provided with a screw control mechanism capable of controlling the advancement speed of the screw; The fusion device connection block comprises a connection block body, a clamping claw and a second sliding block, and the connection block body is provided with a slot capable of being clamped with a screw rod and a through hole capable of passing an inner rod; A fusion device connection block is slidably arranged between the upper and lower blades, the fusion device connection block clamps the fusion device, and the end of the inner rod passes through the fusion device connection block and is threadedly connected with the fusion device.

2. The intervertebral fusion cage uniform speed limiting implantation device according to claim 1, characterized in that: The outer wall of the main body is symmetrically provided with a first groove along the cavity thereof, a first opening is provided below the starting end of the first groove, and the starting end of the blade is hinged in the first groove above the first opening.

3. The intervertebral fusion cage uniform speed limiting implantation device according to claim 2, characterized in that: A second groove is provided on one side of the first groove, and a blade opening and closing control mechanism is installed in the second groove. The blade opening and closing control mechanism includes a first spring and a blade switch block. One end of the first spring is fixedly connected to the inner wall of the second groove, and the other end is connected to the starting end of the blade switch block. The end of the blade switch block is inserted into the side of the blade close to the bottom of the first groove under the push of the first spring.

4. The intervertebral fusion cage uniform speed limiting implantation device according to claim 3, characterized in that: A slot matching with the end of the leaf switch block is provided on the end surface of the leaf close to the bottom of the first groove.

5. The intervertebral fusion cage uniform speed limiting implantation device according to claim 1, characterized in that: The blade is elastic; the outer wall of the blade is provided with a first elongated hole matched with the fusion device connection block, and an opening for installing the fusion device connection block is opened at one end of the first elongated hole close to the main body; the outer wall of the blade is provided with a limiting block that can be clamped on the lumbar vertebra.

6. The intervertebral fusion cage uniform speed limiting implantation device according to claim 1, characterized in that: The screw control mechanism includes a second spring, a button, a pin and a first threaded tooth. A button movable groove is provided on the main body. One end of the second spring is connected to the bottom of the button movable groove, and the other end of the second spring is connected to the button. The button is located in the button movable groove. The button is a cavity structure. The inner cavity of the button is provided with a first threaded tooth that matches the thread of the screw. The screw passes through the button. Under the action of the second spring, the first threaded tooth abuts against the screw. A long through hole is provided on the button, and the pin passes through the long through hole. Both ends of the pin are fixed to the main body.

7. The intervertebral fusion cage uniform speed limiting implantation device according to claim 1, characterized in that: The screw control mechanism includes a shell, a first slider, a third spring, a threaded tooth block and a first slider pin, the main body is provided with a shell mounting groove, the shell is arranged in the shell mounting groove, the shell is provided with a screw through hole, the shell is also provided with a first slider mounting groove, the first slider mounting groove is connected to the screw through hole, one end of the first slider mounting groove is connected to one end of the third spring, and the other end of the third spring is connected to the first slider, the end of the first slider facing the screw mounting groove is provided with a threaded tooth block movable hole, and inclined sliding holes are provided on both side walls of the threaded tooth block movable hole, the threaded tooth block includes a transverse block and a second threaded tooth installed on the end surface of the transverse block facing the screw, the threaded tooth block is installed in the threaded tooth block movable hole, and the threaded tooth block is provided with a first slider pin extending into the sliding hole, and the first slider pin is located at the lowermost end of the sliding hole under the push of the third spring, and at this time the second threaded tooth contacts the screw.

8. The intervertebral fusion cage uniform speed limiting implantation device according to claim 7, characterized in that: The first sliding block is provided with an outwardly protruding pushing end.

9. The intervertebral fusion cage uniform speed limiting implantation device according to claim 5, characterized in that: The connecting block body is provided with a second sliding block matched with the first long hole on the blade, and an elastic clamping claw is provided at one end of the connecting block body close to the fusion device.

10. The intervertebral fusion cage uniform speed limiting implantation device according to claim 9, characterized in that: The second sliding block is in a "T"-shaped structure.

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