CN116807696A

CN116807696A - Interbody fusion cage

Info

Publication number: CN116807696A
Application number: CN202310749890.5A
Authority: CN
Inventors: 柯代波; 程杰; 续岭
Original assignee: Affiliated Hospital of Zunyi Medical University
Current assignee: Affiliated Hospital of Zunyi Medical University
Priority date: 2023-06-25
Filing date: 2023-06-25
Publication date: 2023-09-29

Abstract

The utility model discloses an interbody fusion cage, which belongs to the technical field of interbody fusion cages, wherein a first driving block and a second driving block are sleeved on a first driving screw rod, the first driving screw rod can adjust the distance between the first driving block and the second driving block, the first driving block and the second driving block can push two supporting plates to be away from each other, an inclined first driving sliding rail is fixedly connected to the first driving block, an inclined second driving sliding rail is fixedly connected to the second driving block, and the second driving sliding rail and the first driving sliding rail are mutually symmetrical; the two supporting plates are respectively positioned at two opposite sides of the first driving screw, one side of each supporting plate, which is close to the first driving screw, is provided with a first driving slide way and a second driving slide way, and the first driving slide way are correspondingly and slidably connected. The driving force of the utility model is the same at the initial stage and the later stage of driving, and the rotation number of the first driving screw is always in direct proportion to the spreading distance of the spreader, so that the spreading distance is convenient to control.

Description

Interbody fusion cage

Technical Field

The utility model belongs to the technical field of interbody fusion devices, and particularly relates to an interbody fusion device.

Background

Interbody fusion is the removal of a diseased disc to relieve or completely relieve the stress caused by the protrusion while providing fusion fixation to maintain the height of the intervertebral disc.

The prior interbody fusion cage, as disclosed in the chinese patent of publication No. CN216257665U, a customized interbody fusion cage structure, which comprises a supporting body, the inside activity of the supporter is connected with the pivot in a penetrating way, the outside of pivot is provided with the socket, the surface of pivot is located the inside fixedly connected with two-way threaded rod of supporter, the equal threaded connection in surface both sides of two-way threaded rod has the sleeve, telescopic surface is located the left side swing joint of two-way threaded rod has first bracing piece, and telescopic surface is located the right side swing joint of two-way threaded rod has the second bracing piece, the upper and lower both ends of supporter all activity card and have the cardboard, the outer surface fixedly connected with fusion plate of cardboard, the first bracing piece and the second bracing piece at upper and lower both ends are driven respectively to displace by two sleeves, the first bracing piece at both ends and the second bracing piece of second bracing piece drive the upper and lower both sides respectively, reach the effect of adjusting two adjacent interbody distance, thereby can be better be applicable to the crowd of different spine shapes and use, the commonality of the cage has been improved.

However, although the technical scheme solves the problem of adjusting the height of the fusion plate, the following technical problems still exist: when the fusion plate is driven to be spread, because the included angle between the first support rods and the bidirectional screw rods is small, larger force is needed at the initial spreading stage to spread the fusion plate, so that the fusion plate is inconvenient in practical use, the needed force is reduced along with the increase of the included angle between the first support rods, and if the fusion plate is still driven by the initial force at the moment, the fusion plate is too large to spread and inconvenient to adjust, so that the damage to the vertebra is generated; and, the number of turns of the bidirectional threaded rod and the expanding distance of the fusion plate are not in direct proportion, so that the expanding distance is inconvenient to control.

Disclosure of Invention

Aiming at the problems existing in the prior art, the utility model provides an intervertebral fusion device which has the characteristics that the driving force at the initial stage and the driving force at the later stage are the same, and the rotation number of a first driving screw is always in direct proportion to the spreading distance of a spreader plate, so that the spreading distance is convenient to control.

The utility model is realized in such a way that the interbody fusion cage comprises a first driving screw, a first driving block, a second driving block and two supporting plates, wherein the first driving block and the second driving block are sleeved on the first driving screw, the first driving screw can adjust the interval between the first driving block and the second driving block, the first driving block and the second driving block can push the two supporting plates to be away from each other, the first driving block is fixedly connected with an inclined first driving slide rail, the second driving block is fixedly connected with an inclined second driving slide rail, and the second driving slide rail and the first driving slide rail are mutually symmetrical;

the two supporting plates are respectively located at two opposite sides of the first driving screw, one side, close to the first driving screw, of each supporting plate is provided with a first driving slide way and a second driving slide way, the first driving slide way corresponds to the first driving slide rail and is in sliding connection, and the second driving slide way corresponds to the second driving slide rail and is in sliding connection.

When the support plate is used, the first driving screw is enabled to rotate, so that the distance between the first driving block and the second driving block is adjusted, the distance between the first driving slide rail and the second driving slide rail is adjusted, the first driving slide rail and the second driving slide rail slide relative to the first driving slide rail and the second driving slide rail respectively, and the two support plates are pushed to be far away from each other. Through this setting, because first drive slide rail and second drive slide rail fixed connection respectively on first drive piece and second drive piece, consequently, the inclination is invariable all the time, and this driving force that sets up at drive initial stage and later stage is the same promptly to, first drive screw rotates the number of turns and the distance of strutting plate's strutting is directly proportional all the time, consequently is convenient for control the distance of strutting.

It should be noted that, when actual production, this product of different models can be set up, and the difference of different models is that the contained angle between first drive slide rail and the first drive screw is different, and the contained angle is the less, and the drive fagging struts required power is less, but the distance that struts is also less, and the contained angle is the greater, and the drive fagging struts required power is the greater, but the distance that struts is also the greater, and when actual use, this product of different models can be selected according to different demands.

As a preferable mode of the utility model, the outer peripheral surface of the first driving screw is provided with an annular accommodating groove, and the first driving block is rotationally sleeved in the annular accommodating groove;

the axle center position of second drive piece has seted up first screw hole, first screw hole with first drive screw threaded connection.

Because the first driving block is rotationally sleeved in the annular accommodating groove, the first driving block cannot axially move relative to the first driving screw, and because the second driving block and the first driving screw are in threaded connection, the first driving screw can rotate to drive the second driving block to be close to or far away from the first driving block, and in this way, the distance between the first driving block and the second driving block can be adjusted.

As a preferred aspect of the present utility model, the first drive rail and the second drive rail are inclined to a side away from each other; an inner cavity is formed in the second driving block, the end part of the first driving screw is positioned in the inner cavity, a limiting sliding rail axially parallel to the first driving screw is arranged in the inner cavity, and a sliding block is connected onto the limiting sliding rail in a sliding manner; the sliding block can be driven by the sliding block driving piece to axially move along the limiting sliding rail; the second driving block and two corresponding sides of the supporting plates are provided with through holes communicated with the inner cavity, the through holes are rotationally connected with lever type toggle pieces through rotating shafts, and when the sliding block moves, the lever type toggle pieces can be driven to rotate; the outer surface of the supporting plate is connected with a rotating plate through a plate spring, the supporting plate is provided with a channel, and the end part of the lever type stirring piece can penetrate through the channel to stir the rotating plate to incline.

When the device is used, the first driving screw is rotated, so that the second driving block moves to one side of the first driving block, and the two supporting plates are driven to be away from each other, so that the function of adjusting the distance between the two supporting plates is realized; then, first drive screw and second drive piece are motionless relatively, make slider driving piece drive slider along spacing slide rail axial displacement to stir lever and stir the piece and rotate, the tip that lever stirred the piece stirs the swivel plate slope, thereby more laminating with the vertebra. In this embodiment, the rotating plate is in contact with the vertebrae, so that the fusion teeth are formed on the outer surface of the rotating plate.

In the present utility model, preferably, the axis part of the slider has a second screw hole; the first driving screw is internally provided with a containing cavity, the sliding block driving piece is a rod-shaped driving piece and is arranged in the containing cavity, the sliding block driving piece can rotate relative to the first driving screw and cannot axially move, one end, close to the sliding block, of the sliding block driving piece extends out of the containing cavity, one end, close to the sliding block, of the sliding block driving piece is provided with external threads, and the external threads can be in threaded fit with the second threaded hole.

When the device is used, the first driving screw is rotated, so that the second driving block moves to one side of the first driving block, and the two supporting plates are driven to be away from each other, so that the function of adjusting the distance between the two supporting plates is realized; meanwhile, the end part of the slider driving piece is attached to the slider and aligned with the second threaded hole; then, first drive screw and second drive piece are motionless relatively, rotate the slider driving piece, make the external screw thread can with second screw hole screw thread cooperation, when continuously rotating the rod-like driving piece, because the rod-like driving piece can be relative first drive screw rotates, and can not axial displacement, consequently, can order about the slider to be close to one side axial displacement of first drive screw to the slider stirs lever and stir the piece rotation, the tip of lever stirring piece stirs the commentaries on classics board slope, thereby more laminating with the vertebra.

As preferable, the sliding block driving piece comprises a round rod, a limiting rod and a sleeve; the round rod is positioned in the accommodating cavity, the outer ring of the round rod is provided with a limiting block, and the side wall of the accommodating cavity is provided with an annular groove matched with the limiting block; (the stopper is in the annular groove, so the round bar can rotate relative to the first drive screw but cannot move axially).

One end of the limiting rod is fixedly connected with one end of the round rod, which is close to the sliding block, the other end of the limiting rod extends into the sleeve, and the limiting rod and the sleeve can relatively move axially and cannot relatively rotate (for example, the cross sections of the limiting rod and the sleeve are non-circular);

a spring is sleeved on the limiting rod, and two ends of the spring respectively abut against the round rod and the sleeve; the external thread set up in the sleeve surface, the external thread can with second screw hole threaded connection, the sleeve is inside to have spacing slide, one side of gag lever post has the arch, protruding slip set up in the spacing slide.

When the sleeve is used, as the distance required to be spread by the supporting plate can be different under different use conditions (for example, different positions or patients), through the arrangement, when the end part of the sleeve is in contact with the sliding block, the first driving screw can still be continuously rotated to continuously adjust the spread distance of the supporting plate, and the sleeve compresses the spring at the moment, so that the sleeve cannot enter the second threaded hole; when the sleeve needs to enter the second threaded hole, the first driving screw rod is fixed, the round rod is reversely rotated, the sleeve is driven to rotate into the second threaded hole through the transmission of the limiting rod, and the sliding block is driven to axially move to one side close to the first driving screw rod, so that the sliding block toggles the lever toggle piece to rotate, the end part of the lever toggle piece toggles the rotary plate to incline, and the lever toggle piece is attached to vertebrae.

The limiting slide way and the bulge have the functions that: on one hand, the limiting rod and the sleeve can move axially relatively and cannot rotate relatively (the cross sections of the limiting rod and the sleeve can be circular or non-circular); on the other hand, the stop lever is prevented from being separated from the sleeve.

As a preferable mode of the utility model, the lever type toggle piece comprises a first toggle plate and a second toggle plate; the first stirring plate is rotatably connected to the through hole through a rotating shaft, and one end of the first stirring plate, which is close to the sliding block, is provided with an accommodating slideway; one end of the second stirring plate is in sliding fit with the accommodating slideway, and the other end of the second stirring plate is rotationally connected with the sliding block.

When the rotary plate is used, the sliding block can drive the second stirring plate to rotate when moving, and the second stirring plate stirs the first stirring plate to rotate, so that the end part of the first stirring plate stirs the rotary plate to incline. It should be noted that, when the second toggle plate toggles the first toggle plate to rotate, the second toggle plate slides in the accommodating slideway at the same time.

As a preferable aspect of the present utility model, the lever type toggle member includes a third toggle plate, and the third toggle plate is rotatably connected to the through hole through a rotation shaft;

the sliding block is fixedly connected with a first stop lever and a second stop lever which are parallel to each other, and one end of the third stirring plate is positioned between the first stop lever and the second stop lever.

When the sliding block is used, the sliding block drives the first stop lever and the second stop lever to move, the third stirring plate can be stirred to rotate at the same time, and the other end of the third stirring plate can be stirred to tilt the rotating plate.

Preferably, the end part of the first driving screw is provided with a first inner hexagonal hole for driving the first driving screw to rotate; the first inner hexagonal hole is communicated with the accommodating cavity; the end part of the round rod is provided with a second inner hexagonal hole, and the second inner hexagonal hole is used for driving the round rod to rotate.

Preferably, one end of the first driving screw adjacent to the second driving block is provided with a stop block, and the stop block is positioned in the inner cavity. With this arrangement, the second drive block can be prevented from coming off the first drive screw.

Compared with the prior art, the utility model has the following beneficial effects:

1. when the support plate is used, the first driving screw is enabled to rotate, so that the distance between the first driving block and the second driving block is adjusted, the distance between the first driving slide rail and the second driving slide rail is adjusted, the first driving slide rail and the second driving slide rail slide relative to the first driving slide rail and the second driving slide rail respectively, and the two support plates are pushed to be far away from each other. Through the arrangement, as the first driving sliding rail and the second driving sliding rail are respectively and fixedly connected to the first driving block and the second driving block, the inclination angle is always unchanged, namely the driving forces of the device at the initial stage and the later stage of driving are the same, and the rotation number of the first driving screw is always in direct proportion to the spreading distance of the supporting plate, so that the spreading distance is convenient to control;

2. when the device is used, the first driving screw is rotated, so that the second driving block moves to one side of the first driving block, and the two supporting plates are driven to be away from each other, so that the function of adjusting the distance between the two supporting plates is realized; meanwhile, the end part of the slider driving piece is attached to the slider and aligned with the second threaded hole; then, first drive screw and second drive piece are motionless relatively, rotate the slider driving piece, make the external screw thread can with second screw hole screw thread cooperation, when continuously rotating the rod-like driving piece, because the rod-like driving piece can be relative first drive screw rotates, and can not axial displacement, consequently, can order about the slider to be close to one side axial displacement of first drive screw to the slider stirs lever and stir the piece rotation, the tip of lever stirring piece stirs the commentaries on classics board slope, thereby more laminating with the vertebra.

3. Because the distance that the stay plate needs to be spread under different use conditions can be different (for example, different for patients or parts), through the arrangement, when the end part of the sleeve is in contact with the sliding block, the first driving screw can still be continuously rotated, the spread distance of the stay plate can be continuously adjusted, and the sleeve compresses the spring at the moment, so that the sleeve cannot enter the second threaded hole; when the sleeve needs to enter the second threaded hole, the first driving screw rod is fixed, the round rod is reversely rotated, the sleeve is driven to rotate into the second threaded hole through the transmission of the limiting rod, and the sliding block is driven to axially move to one side close to the first driving screw rod, so that the sliding block toggles the lever toggle piece to rotate, the end part of the lever toggle piece toggles the rotary plate to incline, and the lever toggle piece is attached to vertebrae.

Drawings

FIG. 1 is a schematic perspective view of an intervertebral cage according to an embodiment of the present utility model from a first perspective;

FIG. 2 is a schematic view of an exploded construction of an interbody cage according to an embodiment of the present utility model;

FIG. 3 is a schematic side view of an interbody cage according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of portion A-A of FIG. 3, provided in accordance with an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of the portion B of FIG. 4 according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the portion C in FIG. 4 according to an embodiment of the present utility model;

FIG. 7 is an enlarged schematic view of the portion E of FIG. 6 according to an embodiment of the present utility model;

FIG. 8 is an enlarged schematic view of the portion D of FIG. 5 according to an embodiment of the present utility model;

fig. 9 is a front view of the lever type toggle member provided in embodiment 1 of the present utility model;

fig. 10 is a front view of a lever-type toggle member provided in embodiment 2 of the present utility model;

FIG. 11 is a schematic perspective view of an interbody cage according to an embodiment of the present utility model at a second view;

fig. 12 is an enlarged schematic view of the portion F in fig. 11 according to an embodiment of the present utility model.

In the figure: 1. a first drive screw; 2. a first driving block; 3. a second driving block; 4. a supporting plate; 5. a first drive rail; 6. the second driving slide rail; 7. a first drive slide; 8. a second drive slide; 9. an annular accommodating groove; 10. a first threaded hole; 11. an inner cavity; 12. a limit sliding rail; 13. a slide block; 14. a slider driving member; 141. a round bar; 142. a limit rod; 143. a sleeve; 144. a limiting block; 145. an annular groove; 146. a spring; 147. limiting slide ways; 148. a protrusion; 15. a through hole; 16. lever type toggle piece; 161. a first toggle plate; 162. a second toggle plate; 163. accommodating the slideway; 164. a third toggle plate; 165. a first stop lever; 166. a second stop lever; 17. a rotating plate; 171. a leaf spring; 18. a channel; 19. a second threaded hole; 20. a receiving chamber; 21. an external thread; 22. a first internal hexagonal hole; 23. a second internal hexagonal hole; 24. and a stop block.

Detailed Description

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings.

The structure of the present utility model will be described in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1 and 2, the interbody fusion cage provided by the embodiment of the present utility model includes a first driving screw 1, a first driving block 2, a second driving block 3, and two supporting plates 4, where the first driving block 2 and the second driving block 3 are both sleeved on the first driving screw 1, the first driving screw 1 can adjust a distance between the first driving block 2 and the second driving block 3, the first driving block 2 and the second driving block 3 can push the two supporting plates 4 to be away from each other, an inclined first driving sliding rail 5 is fixedly connected to the first driving block 2, an inclined second driving sliding rail 6 is fixedly connected to the second driving block 3, and the second driving sliding rail 6 and the first driving sliding rail 5 are symmetrical with each other; the two supporting plates 4 are respectively located at two opposite sides of the first driving screw 1, a first driving slide way 7 and a second driving slide way 8 are respectively arranged at one side, close to the first driving screw 1, of the two supporting plates 4, the first driving slide way 7 is in corresponding sliding connection with the first driving slide rail 5, and the second driving slide way 8 is in corresponding sliding connection with the second driving slide rail 6.

When the two-way drive device is used, the first drive screw 1 is rotated, so that the distance between the first drive block 2 and the second drive block 3 is adjusted, the distance between the first drive slide rail 5 and the second drive slide rail 6 is further adjusted, the first drive slide rail 5 and the second drive slide rail 6 slide relative to the first drive slide rail 7 and the second drive slide rail 8 respectively, and the two support plates 4 are pushed away from each other. Through this setting, because first drive slide rail 5 and second drive slide rail 6 are fixed connection respectively on first drive piece 2 and second drive piece 3, consequently, the inclination is invariable throughout, and the drive power at initial stage and later stage of drive is the same promptly to, first drive screw 1 turns and the distance of strutting of fagging 4 struts that struts is directly proportional throughout, consequently is convenient for control the distance of strutting.

It should be noted that, when actually producing, this product of different models can be set up, and the difference of different models is that the contained angle between first drive slide rail 5 and the first drive screw 1 is different, and the contained angle is the less, and the drive fagging 4 struts required power less, but the distance that struts is also less, and the contained angle is the greater, and the drive fagging 4 struts required power more, but the distance that struts is also greater, and when in actual use, this product of different models can be selected according to different demands.

Referring to fig. 3-6, the outer peripheral surface of the first driving screw 1 has an annular accommodating groove 9, and the first driving block 2 is rotatably sleeved in the annular accommodating groove 9; the axis position of the second driving block 3 is provided with a first threaded hole 10, and the first threaded hole 10 is in threaded connection with the first driving screw 1.

Since the first driving block 2 is rotatably sleeved in the annular accommodating groove 9, the first driving block 2 cannot axially move relative to the first driving screw 1, and since the second driving block 3 and the first driving screw 1 are in threaded connection, the first driving screw 1 can rotate to drive the second driving block 3 to be close to or far away from the first driving block 2, and in this way, the distance between the first driving block 2 and the second driving block 3 can be adjusted.

Referring to fig. 2 and 6, the first driving rail 5 and the second driving rail 6 are inclined to a side away from each other; the second driving block 3 is internally provided with an inner cavity 11, the end part of the first driving screw 1 is positioned in the inner cavity 11, a limiting slide rail 12 axially parallel to the first driving screw 1 is arranged in the inner cavity 11, and a slide block 13 is connected onto the limiting slide rail 12 in a sliding manner.

The sliding block 13 can be driven by the sliding block driving piece 14 to axially move along the limit sliding rail 12; the two sides of the second driving block 3 and the two supporting plates 4 corresponding to each other are provided with through holes 15 communicated with the inner cavity 11, lever type poking pieces 16 are rotatably connected in the through holes 15 through rotating shafts, and when the sliding blocks 13 move, the lever type poking pieces 16 can be driven to rotate; the outer surface of the supporting plate 4 is connected with a rotating plate 17 through a plate spring 171, the supporting plate 4 is provided with a channel 18, and the end part of the lever type poking piece 16 can penetrate through the channel 18 to poke the rotating plate 17 to incline.

When the device is used, the first driving screw 1 is rotated, so that the second driving block 3 moves to the side of the first driving block 2, and the two supporting plates 4 are driven to be away from each other, so that the function of adjusting the distance between the two supporting plates 4 is realized; then, the first driving screw 1 and the second driving block 3 are relatively fixed, so that the sliding block driving piece 14 drives the sliding block 13 to axially move along the limiting sliding rail 12, thereby stirring the lever type stirring piece 16 to rotate, and the end part of the lever type stirring piece 16 stirs the rotating plate 17 to incline, so that the lever type stirring piece is more attached to vertebrae. In this embodiment, the rotating plate 17 is in contact with the vertebrae, and thus the fusion teeth are formed on the outer surface of the rotating plate 17. The plate spring 171 serves to connect the rotating plate 17 and to limit the opening angle of the rotating plate 17 to within 20 °, so that the single-sided opening angle of the rotating plate 17 is small.

Referring to fig. 6, the axial center of the slider 13 has a second threaded hole 19; the first driving screw 1 is internally provided with a containing cavity 20, the sliding block driving piece 14 is a rod-shaped driving piece and is arranged in the containing cavity 20, the sliding block driving piece 14 can rotate relative to the first driving screw 1 and cannot axially move, one end, close to the sliding block 13, of the sliding block driving piece 14 extends out of the containing cavity 20, one end, close to the sliding block 13, of the sliding block driving piece 14 is provided with an external thread 21, and the external thread 21 can be in threaded fit with the second threaded hole 19.

When the device is used, the first driving screw 1 is rotated, so that the second driving block 3 moves to the side of the first driving block 2, and the two supporting plates 4 are driven to be away from each other, so that the function of adjusting the distance between the two supporting plates 4 is realized; at the same time, the end of the slider driver 14 engages the slider 13 and is aligned with the second threaded hole 19; then, the first driving screw 1 and the second driving block 3 are relatively fixed, the sliding block driving member 14 is rotated, the external thread 21 can be in threaded fit with the second threaded hole 19, and when the rod-shaped driving member is continuously rotated, the rod-shaped driving member can rotate relative to the first driving screw 1 and cannot axially move, so that the sliding block 13 can be driven to axially move towards one side close to the first driving screw 1, the sliding block 13 drives the lever-type stirring member 16 to rotate, and the end part of the lever-type stirring member 16 drives the rotating plate 17 to incline so as to be more fit with vertebrae.

Referring to fig. 4 and fig. 6-8, the slider driving member 14 includes a round rod 141, a limit rod 142, and a sleeve 143; the round rod 141 is located in the accommodating cavity 20, and the outer ring of the round rod 141 is provided with a limiting block 144, the side wall of the accommodating cavity 20 is provided with an annular groove 145 matched with the limiting block 144, and the limiting block 144 is arranged in the annular groove 145, so that the round rod 141 can rotate relative to the first driving screw 1 and cannot move axially (one side of the annular groove 145 is communicated with a mounting channel, the mounting channel is used for the limiting block 144 to enter the arc groove 145, a clamping block is fixedly connected in the mounting channel through a screw, and the clamping block is used for preventing the limiting block 144 from being separated from the arc groove 145).

One end of the limiting rod 142 is fixedly connected with one end of the round rod 141, which is close to the sliding block 13, for example, the round rod 141 and the limiting rod 142 can be integrally formed or connected through welding, the other end of the limiting rod 142 extends into the sleeve 143, and the limiting rod 142 and the sleeve 143 can relatively move axially but cannot relatively rotate (for example, the cross sections of the limiting rod 142 and the sleeve 143 are non-circular); a spring 146 is sleeved on the limiting rod 142, and two ends of the spring 146 respectively abut against the round rod 141 and the sleeve 143; the external thread 21 is arranged on the outer surface of the sleeve 143, the external thread 21 can be in threaded connection with the second threaded hole 19, a limiting slide 147 is arranged in the sleeve 143, a protrusion 148 is arranged on one side of the limiting rod 142, and the protrusion 148 is slidably arranged in the limiting slide 147.

In use, since the distance the stay plate 4 needs to be spread out may be different in different use situations (for example, different for patients or parts), by this arrangement, when the end of the sleeve 143 abuts against the slider 13, the first driving screw 1 can still be rotated continuously, the spread distance of the stay plate 4 is adjusted continuously, and the sleeve 143 compresses the spring 146, so that the sleeve 143 does not enter the second threaded hole 19; when the sleeve 143 needs to be put into the second threaded hole 19, the first driving screw 1 is fixed, the round rod 141 is reversely rotated, so that the sleeve 143 is driven to rotate into the second threaded hole 19 through the transmission of the limiting rod 142, and the sliding block 13 is driven to axially move towards one side close to the first driving screw 1, so that the sliding block 13 drives the lever type stirring piece 16 to rotate, and the end part of the lever type stirring piece 16 drives the rotating plate 17 to incline, so that the sliding block is more attached to vertebrae.

The limiting slide 147 and the protrusion 148 function as: on the one hand, the limiting rod 142 and the sleeve 143 can move axially relatively and cannot rotate relatively (the cross sections of the limiting rod 142 and the sleeve 143 can be circular or non-circular); on the other hand, the stopper rod 142 and the sleeve 143 are prevented from being separated.

Referring to fig. 9, the lever-type toggle member 16 includes a first toggle plate 161 and a second toggle plate 162; the first toggle plate 161 is rotatably connected to the through hole 15 through a rotating shaft, and one end of the first toggle plate 161, which is close to the sliding block 13, is provided with a containing slideway 163; one end of the second toggle plate 162 is slidably engaged with the accommodating slideway 163, and the other end of the second toggle plate 162 is rotatably connected to the slider 13.

When in use, the sliding block 13 moves to drive the second shifting plate 162 to rotate, and the second shifting plate 162 shifts the first shifting plate 161 to rotate, so that the end part of the first shifting plate 161 shifts the rotating plate 17 to incline. It should be noted that, when the second toggle plate 162 toggles the first toggle plate 161 to rotate, the second toggle plate 162 slides in the accommodating slideway 163 at the same time.

Referring to fig. 11 and 12, the end of the first driving screw 1 has a first inner hexagonal hole 22 for driving the first driving screw 1 to rotate; the first internal hexagonal hole 22 communicates with the accommodation chamber 20; the end of the round rod 141 has a second inner hexagonal hole 23, and the second inner hexagonal hole 23 is used for driving the round rod 141 to rotate.

Referring to fig. 6, the end of the first driving screw 1 near the second driving block 3 has a stop 24, and the stop 24 is located in the inner cavity 11. With this arrangement, the second drive block 3 can be prevented from coming off the first drive screw 1.

Example 2

Unlike example 1, the following is:

referring to fig. 10, the lever-type toggle member 16 includes a third toggle plate 164, and the third toggle plate 164 is rotatably connected to the through hole 15 through a rotation shaft; the sliding block 13 is fixedly connected with a first stop lever 165 and a second stop lever 166 which are parallel to each other, and one end of the third toggle plate 164 is located between the first stop lever 165 and the second stop lever 166.

When in use, the sliding block 13 moves to drive the first stop lever 165 and the second stop lever 166 to move, and simultaneously the third stirring plate 164 can be stirred to rotate, and the other end of the third stirring plate 164 can be stirred to tilt the rotating plate 17. The working principle of the utility model is as follows:

when the two-way drive device is used, the first drive screw 1 is rotated during use, so that the distance between the first drive block 2 and the second drive block 3 is adjusted, the distance between the first drive slide rail 5 and the second drive slide rail 6 is further adjusted, the first drive slide rail 5 and the second drive slide rail 6 slide relative to the first drive slide rail 7 and the second drive slide rail 8 respectively, and the two support plates 4 are pushed away from each other. Through this setting, because first drive slide rail 5 and second drive slide rail 6 are fixed connection respectively on first drive piece 2 and second drive piece 3, consequently, the inclination is invariable all the time, and this driving force that sets up at driving initial stage and later stage is the same promptly to, first drive screw 1 turns and the distance of strutting of fagging 4 struts that struts is directly proportional all the time, consequently is convenient for control the distance of strutting.

Since the distance the spreader 4 needs to be spread out may be different in different use situations (e.g. different for a patient or a site), by this arrangement, when the end of the sleeve 143 abuts the slider 13, it is still possible to continue to rotate the first drive screw 1, continuing to adjust the distance the spreader 4 is spread out, at which time the sleeve 143 compresses the spring 146, so that the sleeve 143 does not enter the second threaded hole 19; when the sleeve 143 needs to be put into the second threaded hole 19, the first driving screw 1 is fixed, the round rod 141 is reversely rotated, so that the sleeve 143 is driven to rotate into the second threaded hole 19 through the transmission of the limiting rod 142, and the sliding block 13 is driven to axially move towards one side close to the first driving screw 1, so that the sliding block 13 drives the lever type stirring piece 16 to rotate, and the end part of the lever type stirring piece 16 drives the rotating plate 17 to incline, so that the sliding block is more attached to vertebrae.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an interbody fusion cage, includes first drive screw (1), first drive piece (2), second drive piece (3), two fagging (4), first drive piece (2) with second drive piece (3) all cup joint in first drive screw (1), first drive screw (1) can be adjusted first drive piece (2) with interval between second drive piece (3), first drive piece (2) with second drive piece (3) can promote two fagging (4) keep away from each other, its characterized in that:

the first driving block (2) is fixedly connected with an inclined first driving sliding rail (5), the second driving block (3) is fixedly connected with an inclined second driving sliding rail (6), and the second driving sliding rail (6) and the first driving sliding rail (5) are mutually symmetrical;

two fagging (4) are located respectively the both sides that first drive screw (1) is relative, two one side that fagging (4) are close to first drive screw (1) all has first drive slide (7) and second drive slide (8), first drive slide (7) with first drive slide (5) correspond and sliding connection, second drive slide (8) with second drive slide (6) correspond and sliding connection.

2. An intervertebral fusion as recited in claim 1 wherein:

the outer peripheral surface of the first driving screw (1) is provided with an annular accommodating groove (9), and the first driving block (2) is rotationally sleeved in the annular accommodating groove (9);

a first threaded hole (10) is formed in the axis position of the second driving block (3), and the first threaded hole (10) is in threaded connection with the first driving screw (1).

3. An intervertebral fusion as recited in claim 1 wherein:

the first driving sliding rail (5) and the second driving sliding rail (6) incline to the far side;

an inner cavity (11) is formed in the second driving block (3), the end part of the first driving screw (1) is located in the inner cavity (11), a limiting slide rail (12) axially parallel to the first driving screw (1) is arranged in the inner cavity (11), and a sliding block (13) is connected onto the limiting slide rail (12) in a sliding mode;

the sliding block driving piece (14) is further included, and the sliding block (13) can be driven by the sliding block driving piece (14) to axially move along the limit sliding rail (12);

the two sides of the second driving block (3) and the two supporting plates (4) are provided with through holes (15) which are communicated with the inner cavity (11), the through holes (15) are rotationally connected with lever type toggle pieces (16) through rotating shafts, and when the sliding block (13) moves, the lever type toggle pieces (16) can be driven to rotate;

the outer surface of the supporting plate (4) is connected with a rotating plate (17) through a plate spring (171), the supporting plate (4) is provided with a channel (18), and the end part of the lever type stirring piece (16) can penetrate through the channel (18) to stir the rotating plate (17) to incline.

4. An intervertebral fusion as recited in claim 3 wherein:

the axis part of the sliding block (13) is provided with a second threaded hole (19);

the novel sliding block type air conditioner is characterized in that the first driving screw (1) is internally provided with a containing cavity (20), the sliding block driving piece (14) is a rod-shaped driving piece and is arranged in the containing cavity (20), the sliding block driving piece (14) can rotate relative to the first driving screw (1) and cannot axially move, one end, close to the sliding block (13), of the sliding block driving piece (14) extends out of the containing cavity (20), one end, close to the sliding block (13), of the sliding block driving piece (14) is provided with an external thread (21), and the external thread (21) can be in threaded fit with the second threaded hole (19).

5. An intervertebral fusion as recited in claim 4 wherein: the sliding block driving piece (14) comprises a round rod (141), a limiting rod (142) and a sleeve (143);

the round rod (141) is positioned in the accommodating cavity (20), a limiting block (144) is arranged on the outer ring of the round rod (141), and an annular groove (145) matched with the limiting block (144) is formed in the side wall of the accommodating cavity (20);

one end of the limiting rod (142) is fixedly connected with one end, close to the sliding block (13), of the round rod (141), the other end of the limiting rod (142) extends into the sleeve (143), and the limiting rod (142) and the sleeve (143) can move axially relatively and cannot rotate relatively;

a spring (146) is sleeved on the limiting rod (142), and two ends of the spring (146) are respectively abutted against the round rod (141) and the sleeve (143);

the external thread (21) set up in sleeve (143) surface, external thread (21) can with second screw hole (19) threaded connection, sleeve (143) inside has spacing slide (147), one side of gag lever post (142) has protruding (148), protruding (148) slip set up in spacing slide (147).

6. An intervertebral fusion as recited in claim 4 wherein:

one side of the annular groove (145) is communicated with a mounting channel, the mounting channel is used for enabling the limiting block (144) to enter the arc-shaped groove (145), a clamping block is fixedly connected in the mounting channel through a screw, and the clamping block is used for preventing the limiting block (144) from being separated from the arc-shaped groove (145).

7. An intervertebral fusion as recited in claim 4 wherein:

the lever type toggle piece (16) comprises a first toggle plate (161) and a second toggle plate (162);

the first stirring plate (161) is rotatably connected to the through hole (15) through a rotating shaft, and one end of the first stirring plate (161) close to the sliding block (13) is provided with an accommodating slideway (163);

one end of the second stirring plate (162) is in sliding fit with the accommodating slideway (163), and the other end of the second stirring plate (162) is rotationally connected with the sliding block (13).

8. An intervertebral fusion as recited in claim 4 wherein:

the lever type stirring piece (16) comprises a third stirring plate (164), and the third stirring plate (164) is rotationally connected with the through hole (15) through a rotating shaft;

the sliding block (13) is fixedly connected with a first stop lever (165) and a second stop lever (166) which are parallel to each other, and one end of the third toggle plate (164) is positioned between the first stop lever (165) and the second stop lever (166).

9. An intervertebral fusion as recited in claim 5 wherein:

the end part of the first driving screw (1) is provided with a first inner hexagonal hole (22) for driving the first driving screw (1) to rotate; the first inner hexagonal hole (22) is communicated with the accommodating cavity (20);

the end of the round rod (141) is provided with a second inner hexagonal hole (23), and the second inner hexagonal hole (23) is used for driving the round rod (141) to rotate.

10. An intervertebral fusion as recited in claim 1 wherein:

one end of the first driving screw (1) close to the second driving block (3) is provided with a stop block (24), and the stop block (24) is positioned in the inner cavity (11).