CN211049547U - Rat endplate and intervertebral disc puncture device - Google Patents

Abstract

The application discloses rat end plate and intervertebral disc piercing depth, including the drilling rod that is used for puncturing the rat centrum, a telescopic needle for puncturing rat end plate and intervertebral disc, a steel wire for controlling telescopic needle is flexible, a wire feeding mechanism for driving the steel wire to remove and a rotary mechanism for driving the drilling rod to rotate, the drilling rod includes the body of rod and drill bit, be provided with the guide passageway that is used for the steel wire to pass in the body of rod, body of rod lateral surface bottom is provided with and holds the recess, telescopic needle sets up in holding the recess, wire feeding mechanism includes first casing and send a subassembly, rotary mechanism includes second casing and rotating assembly, rotating assembly control drilling rod is rotatory to be gone into in the rat centrum, after telescopic needle gets into the centrum along with the drilling rod, send a subassembly control steel wire drive telescopic needle to stretch out, puncture end plate and intervertebral disc, flexible. Because the rat centrum is wider, the device is convenient to position during puncture, the telescopic length of the telescopic needle is controllable, and the puncture depth of the telescopic needle can be adjusted.

Description

Rat endplate and intervertebral disc puncture device

Technical Field

The utility model belongs to the technical field of medical science experimental device technique and specifically relates to a rat endplate and intervertebral disc piercing depth are related to.

Background

In the research of endplate inflammation and intervertebral disc degeneration, a rat is required to be used as a test product to manufacture a rat endplate and intervertebral disc puncture model, the existing model manufacturing tool mainly uses a puncture needle to directly puncture the rat endplate or intervertebral disc, the method has the defects that the positioning of the intervertebral disc is difficult, the depth is difficult to master, and the positioning of the endplate is more difficult when the endplate is punctured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rat end plate and intervertebral disc piercing depth to the problem of location difficulty when using pjncture needle puncture intervertebral disc and end plate among the solution prior art.

The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of rat endplate and intervertebral disc piercing depth, include:

the drill rod for puncturing rat vertebral bodies comprises a rod body and a drill bit arranged at the bottom end of the rod body, wherein a guide channel is arranged in the rod body, a first opening end of the guide channel is positioned on the end surface of the top end of the rod body, a second opening end of the guide channel is positioned on the lower portion of the outer side surface of the rod body, and a containing groove is formed in the position, located at the second opening end, of the rod body;

the telescopic needle is used for puncturing rat end plates and intervertebral discs, the telescopic direction of the telescopic needle is perpendicular to the axis of the rod body, when the telescopic needle is contracted, the telescopic needle is positioned in the accommodating groove, and the needle point of the telescopic needle is flush with the outer side surface of the rod body;

the steel wire is used for controlling the telescopic needle to stretch, one end of the steel wire penetrates through the guide channel and is fixedly connected with the telescopic needle, when the steel wire moves towards the direction close to the telescopic needle, the telescopic needle stretches out, and when the steel wire moves towards the direction far away from the telescopic needle, the telescopic needle contracts;

the wire feeding mechanism comprises a first shell and a wire feeding assembly, the wire feeding assembly is arranged in the first shell and is used for controlling the steel wire to move towards the direction far away from or close to the telescopic needle, the first shell is fixedly connected with the top end of the rod body, the guide channel is communicated with the interior of the first shell, and the wire feeding assembly is fixedly connected with the steel wire;

the rotating mechanism comprises a second shell and a rotating assembly arranged in the second shell and used for driving the rod body to rotate, and the rod body penetrates through the second shell and is in rotating connection with the second shell.

Preferably, send a subassembly to include first driving gear, a transmission gear group, slider and a drive arrangement, first driving gear first transmission gear group all with first casing rotates to be connected, the slider is located the top of the body of rod and with first casing sliding connection, the slip direction is followed the axial direction of the body of rod, the fixed edge that is provided with on the slider the rack of the axial setting of the body of rod, first driving gear passes through a transmission gear group with rack drive connects, a drive arrangement with a driving gear transmission connects, the steel wire with slider fixed connection.

Preferably, the rotating assembly comprises a second driving gear, a second transmission gear set, a driven gear and a second driving device, the driven gear is fixedly connected with the rod body, the axis of the driven gear coincides with the axis of the rod body, the second driving gear is in transmission connection with the driven gear through the second transmission gear set, and the second driving device is in transmission connection with the second driving gear.

Preferably, the telescopic needle comprises a plurality of sleeves which are nested with one another, the outer side face of the sleeve on the outermost side is fixedly connected with the inner side face of the accommodating groove, the head of the sleeve on the innermost side is a needle point, and the tail end of the sleeve on the innermost side is fixedly connected with the steel wire.

Preferably, the steel wire is hollow structure, steel wire one end is provided with the injection interface, the steel wire sets up the one end of injection interface is run through the slider and is extended to the first casing outside, the most inboard of telescopic needle the sleeve is hollow, inside and the most inboard of steel wire the inside intercommunication of sleeve.

Preferably, the first driving device is a first rocking handle, one end of the first rocking handle extends into the first shell and is in transmission connection with the first driving gear, and the other end of the first rocking handle is located outside the first shell, or the first driving device is a first motor arranged inside the first shell, and the first motor is in transmission connection with the first driving gear.

Preferably, the second driving device is a second rocking handle, one end of the second rocking handle extends into the second shell and is in transmission connection with the second driving gear, and the other end of the second rocking handle is located outside the second shell, or the second driving device is a second motor arranged inside the second shell and is in transmission connection with the second driving gear.

Preferably, the body of rod is inside to be provided with two guide channel, two guide channel the second open end is followed the axis symmetry of the body of rod sets up, the body of rod is located every the position department of second open end all is provided with hold the recess, every hold and all be provided with in the recess the telescopic pin, every all be provided with one in the guide channel the steel wire.

Preferably, a marking line for marking the position of the telescopic needle is arranged on the outer side of the rod body.

Preferably, the first housing is provided with a fixing hole for connecting with the injection interface.

The utility model provides a pair of rat endplate and intervertebral disc piercing depth, its beneficial effect is:

the utility model provides a rat endplate and intervertebral disc puncture device, including the drilling rod, the telescopic needle, the steel wire, thread feeding mechanism and rotary mechanism, the drilling rod includes the body of rod and sets up the drill bit in the body of rod bottom, be provided with the guide passageway in the body of rod, the first open end of guide passageway is located the top end face of the body of rod, the second open end is located the lower part of body of rod lateral surface, still be provided with at the position that the body of rod is located the second open end and hold the recess, the telescopic needle sets up in holding the recess, when the telescopic needle contracts, the needle point of telescopic needle is the same level with the lateral surface of the body of rod, be provided with the steel wire that is used for controlling the flexible needle to stretch out and draw back in the guide passageway, steel wire one end passes guide passageway and extends to the telescopic needle always, this end and telescopic needle fixed connection, when the steel wire moves to the direction of telescopic needle, drawing the telescopic needle to retract into the accommodating groove, wherein the wire feeding mechanism comprises a first shell and a wire feeding assembly arranged in the first shell, the bottom end of the first shell is fixedly connected with the top end of the rod body, a guide channel is communicated with the inside of the first shell, the wire feeding assembly inside is fixedly connected with a steel wire and is used for controlling the steel wire to move towards the direction close to or away from the telescopic needle, the rotating mechanism comprises a second shell and a rotating assembly arranged in the second shell, the rod body penetrates through the second shell, the position in contact with the second shell is rotatably connected with the second shell, the rotating assembly arranged in the second shell is used for driving the rod body to rotate, when the wire feeding mechanism is used, the drill bit is aligned to the vertebral body of a rat, the rotating mechanism drives the rod body to rotate, the drill bit drills into the vertebral body of the rat, the vertebral body of the rat is wide, so that the wire feeding mechanism is, the wire feeding mechanism controls the steel wire to move towards the direction close to the telescopic needle, the steel wire pushes the telescopic needle to extend out of the accommodating groove, the telescopic needle penetrates end plates and intervertebral discs on two sides, a breakthrough feeling is generated when the steel wire reaches the end plates and penetrates the intervertebral discs, positioning is not needed, the end plates can be completely punctured or the intervertebral discs can be punctured, and the puncturing depth of the telescopic needle can be controlled by controlling the conveying length of the steel wire. The rat end plate and intervertebral disc puncture device disclosed in this application has changed the mode that current pjncture needle directly punctured the end plate or the intervertebral disc makes the model, drills into the centrum earlier through the drill bit, and rethread telescopic needle punctures end plate or intervertebral disc to extending of centrum both ends, and this mode is because the centrum broad, so the location is convenient.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is an external view of a puncture device according to an embodiment of the present invention;

FIG. 2 is a view of a wire feeder according to an embodiment of the present invention;

FIG. 3 is a top cross-sectional view of a wire feeder in accordance with an embodiment of the present invention;

fig. 4 is a structural view of a rotating mechanism according to an embodiment of the present invention;

FIG. 5 is a view showing the structure of the retractable needle according to the embodiment of the present invention;

fig. 6 is a side view of a rod body according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a rod body according to an embodiment of the present invention;

fig. 8 is a connection diagram of the steel wire and the first housing according to the embodiment of the present invention.

In the figure: 1. a rod body; 2. a drill bit; 3. a guide channel; 4. an accommodating recess; 5. a needle is retracted; 6. a steel wire; 7. a first housing; 8. a second housing; 9. a first drive gear; 10. a first drive gear set; 11. a slider; 12. a first driving device; 13. a rack; 14. a second driving gear; 15. a second drive gear set; 16. a driven gear; 17. a second driving device; 18. an injection port; 19. marking a line; 20. and (7) fixing holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-8, the utility model provides a rat endplate and intervertebral disc piercing depth, including the drilling rod that is used for puncturing the rat centrum, be used for puncturing rat endplate or intervertebral disc flexible needle 5, be used for controlling flexible steel wire 6 of flexible needle 5, be used for controlling the wire drive feed mechanism that 6 removals of steel wire and be used for controlling the rotatory rotary mechanism of drilling rod. The drill rod comprises a rod body 1 and a drill bit 2 arranged at the bottom end of the rod body 1, a guide channel 3 is arranged in the rod body 1, the guide channel 3 penetrates through the rod body 1, a first opening end of the guide channel 3 can be positioned on the top end face of the rod body 1, a second opening end of the guide channel 3 can be positioned at the position, above the drill bit 2, of the lower portion of the outer side face of the rod body 1, and an accommodating groove 4 can be arranged at the position, at which the second opening end of the rod body 1 is positioned; a telescopic needle 5 can be arranged in the accommodating groove 4, the telescopic direction of the telescopic needle 5 is vertical to the axis of the rod body 1, and when the telescopic needle 5 is contracted, the needle point of the telescopic needle 5 is flush with the outer side surface of the rod body 1; one end of the steel wire 6 extends to the second open end from the first open end of the guide channel 3, penetrates out of the second open end and is fixedly connected with the telescopic needle 5, when the steel wire 6 moves towards the direction close to the telescopic needle 5 in the guide channel 3, the steel wire 6 pushes the telescopic needle 5 to extend out, and when the steel wire 6 moves towards the direction far away from the telescopic needle 5 in the guide channel 3, the steel wire 6 pulls the telescopic needle 5 to retract into the accommodating groove 4; the wire feeding mechanism comprises a first shell 7 and a wire feeding assembly arranged in the first shell 7, the top end of the rod body 1 is fixedly connected with the bottom end of the first shell 7, the guide channel 3 is communicated with the interior of the first shell 7, and the wire feeding assembly is fixedly connected with the other end of the steel wire 6 and is used for driving the steel wire 6 to move in the direction far away from or close to the telescopic needle 5; the rotating mechanism comprises a second shell 8 and a rotating assembly arranged in the second shell 8, the rod body 1 penetrates through the second shell 8, the second shell 8 is located below the first shell 7, the position where the rod body 1 is in contact with the second shell 8 is in rotating connection, and the rotating assembly is in transmission connection with the rod body 1 inside the second shell 8 to drive the rod body 1 to rotate. The specific operation process is as follows: hand-held second casing 8, make the centrum of drilling rod and rat place perpendicularly, the centrum of the drill bit 2 alignment rat of drilling rod, it is rotatory to control rotating assembly to drive the drilling rod, the centrum of rat is gone into at rotatory in-process to drill bit 2 of drilling rod, first casing 7 and body of rod 1 fixed connection, so the wire feeding mechanism whole also rotates along with body of rod 1 including first casing 7, after the telescopic needle 5 that is located on the body of rod 1 also gets into the rat centrum, the rotation stops, manual rotatory body of rod 1, make body of rod 1 set up the position of telescopic needle 5 and be located the axis of rat centrum, it promotes steel wire 6 to control wire feeding mechanism, make steel wire 6 move towards the direction of telescopic needle 5, it stretches out to promote telescopic needle 5, the end plate and the intervertebral disc puncture at centrum both ends are punctured to telescopic needle 5, the operation process. The device has changed in the past with the mode that the pjncture needle directly punctures endplate and intervertebral disc, and it is difficult to fix a position with the pjncture needle direct puncture endplate and intervertebral disc, and the degree of depth is difficult to master, and the device adopts earlier perpendicular puncture centrum, punctures endplate and intervertebral disc along the centrum axial again, because the centrum broad of rat, so do benefit to the operation, convenient location, the length of telescopic needle 5 can select extension length according to the circumstances, and the depth of puncture is controllable.

The wire feeding assembly may include a first driving gear 9, a first transmission gear set 10, a slider 11 and a first driving device 12, the first housing 7 may be a rectangular housing, the interior of the first housing is hollow, sliding grooves for the slider 11 to slide may be formed on two opposite sides of the inner side of the first housing 7, the sliding grooves may be rectangular grooves, the rectangular grooves extend along the axial direction of the rod 1, sliding rails are disposed on the slider 11 opposite to the sliding grooves, the sliding rails of the slider 11 are disposed in the sliding grooves and slide relative to the first housing 7, one end of the steel wire 6 close to the slider 11 is fixedly connected to the slider 11, the slider 11 drives the steel wire 6 to move, a rack 13 may be disposed longitudinally on one of the vertical surfaces of the slider 11 perpendicular to the surface on which the sliding rails are disposed, the first driving gear 9 is rotatably connected to the inner side of the first housing 7, the first driving gear set 10 is in transmission connection with the rack 13, the first driving gear 12 drives the first driving gear 9 to rotate, the first driving gear 9 drives the rack 13 to move through the first driving gear set 10, the rack 13 drives the slider 11 to move up and down in the chute, and therefore the steel wire 6 moves towards the direction close to or away from the telescopic needle 5, the first driving gear 12 can be a first rocking handle rotationally connected with the first shell 7, one end of the first rocking handle extends into the first shell 7 to be fixedly connected with the first driving gear 9, the other end of the first rocking handle extends to the outer side of the first shell 7 and is used for manually driving the first rocking handle to rotate so as to drive the first driving gear 9 to rotate, when the first driving gear 12 is the first rocking handle, the manual driving speed is slow, and the moving speed of the steel wire 6 does not need to be too fast, so the first driving gear 9 can not be directly meshed with the rack 13 through the first driving gear set 10 for transmission Alternatively, the transmission ratio of the first transmission gear set 10 may be 1, or the first transmission gear set 10 may be a reduction gear set to slow the movement of the wire 6, or the first driving device 12 may be a first motor having a high rotation speed, so that the first transmission gear set 10 is required to be a reduction gear set to slow the movement of the rack 13.

The rotating assembly may include a second driving gear 14, a second transmission gear set 15, a driven gear 16 and a second driving device 17 disposed in the second housing 8, the driven gear 16 may be rotatably connected to the second housing 8, the driven gear 16 is fixedly connected to the rod 1, and the second driving gear 14 and the second housing 8 rotateThe second driving gear 14 and the driven gear 16 are in transmission connection through a second transmission gear set 15, a second driving device 17 is in transmission connection with the second driving gear 14, the second driving device 17 may be a second rocking handle, one end of the second rocking handle extends into the second housing 8 and is fixedly connected with the second driving gear 14, a second end of the second rocking handle extends to the outside of the second housing 8 for manual operation and rotation, the second rocking handle is manually rotated to drive the second driving gear 14 to rotate at a lower rotation speed, and a drill rod driven by the driven gear 16 needs to be drilled into a rat vertebral body through rotation, so that a higher rotation speed is needed, the second transmission gear set 15 may be an acceleration gear set, the transmission ratio is less than 1, the second driving device 17 may also be a second motor, the second motor is fixedly arranged in the second housing 8 and is in transmission connection with the second driving gear 14, the second motor has a faster rotation speed, so the second driving gear 14 can directly mesh with the driven gear 16 without passing through the second transmission gear set 15 for transmission, or the transmission ratio of the second transmission gear set 15 is 1, or the second transmission gear can be a reduction gearGroup of。

The telescopic needle 5 may include a plurality of sleeves nested with each other, the outermost sleeve has the largest diameter, the innermost sleeve has a needle point at the front end thereof for puncturing a rat endplate or an intervertebral disc, the outermost sleeve has an outer diameter equal to the inner diameter of the receiving groove 4 and an outer side fixedly connected to the inner side of the receiving groove 4, the innermost sleeve may have a rear end fixedly connected to the steel wire 6, the sleeves are disposed between the outermost sleeve and the innermost sleeve, each sleeve has a rear end provided with an outwardly extending flange, a head end provided with an inwardly extending flange, the outermost sleeve has a head end inwardly extending flange, the innermost sleeve has a rear end provided with an outwardly extending flange for preventing the sleeves from being separated during the extension process, the outermost sleeve and the innermost sleeve have a head end provided with an outwardly extending tapered flange, head end inwardly extending's flange department is provided with the holding tank that extends to the tail end, and the telescopic head end that is located the innermost is provided with the toper flange, and the flange department that is located the inside extension of outside sleeve is provided with the holding tank that extends to the tail end, so when 6 pulling innermost sleeve shrinkages of steel wire, can drive adjacent sleeve shrinkages in proper order through toper flange and holding tank.

The steel wire 6 can be of a hollow structure, one end, far away from the telescopic needle 5, of the steel wire 6 is provided with the injection interface 18, the injection interface 18 can be detachably connected with an injector, one end, provided with the injection interface 18, of the steel wire 6 penetrates through the sliding block 11 and extends to the outer side of the first shell 7, the innermost sleeve of the telescopic needle 5 is also of a hollow structure, the inner portion of the steel wire 6 is communicated with the inner portion of the sleeve, medicines can be injected into the injection interface 18, and then the medicines can reach end plates and intervertebral disc positions through the steel wire 6 and the telescopic needle 5, so that the influence of the medicines on the end plates or the intervertebral discs can be.

The inside of the rod body 1 can be provided with two guide channels 3, the first open ends of the two guide channels 3 can be positioned on the top end face of the rod body 1 and symmetrically arranged along the central axis of the top end face, the second open ends of the two guide channels 3 are positioned below the outer side face of the rod body 1 and symmetrically arranged along the central axis of the rod body 1, each guide channel 3 can extend downwards along the axial direction of the rod body 1 from the first open end and then extend to the position of the second open end towards the outer side of the rod body 1, the position of each second open end is provided with a containing groove 4, each containing groove 4 is internally provided with a telescopic needle 5, the central lines of the two telescopic needles 5 are positioned on a straight line, each guide channel 3 is internally provided with a steel wire 6 for controlling the telescopic movement of the telescopic needle 5, the two steel wires 6 are fixedly connected with a sliding block 11, when in use, the two telescopic needles 5 simultaneously extend, the endplates and intervertebral discs at both ends of the vertebral body are punctured.

When the telescopic needle 5 moves to the interior of a vertebral body along with the rod body 1, the orientation of the telescopic needle 5 cannot be observed, so that a marking line 19 can be arranged at the position of the telescopic needle 5 on the outer side of the rod body 1, the marking line 19 extends upwards from the position of the telescopic needle 5 along the axial direction of the rod body 1, and when the telescopic needle 5 is used, the orientation of the telescopic needle 5 can be determined by observing the marking line 19 so as to achieve accurate operation.

The first housing 7 may be provided with a fixing hole 20 for connecting with the syringe port 18, and the syringe port 18 of the wire 6 may be fixed to the fixing hole 20 to prevent the free end of the wire 6 at the end where the syringe port 18 is provided from being freely swung.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A rat endplate and intervertebral disc puncturing device, comprising:

the drill rod for puncturing rat vertebral bodies comprises a rod body (1) and a drill bit (2) arranged at the bottom end of the rod body (1), wherein a guide channel (3) is arranged in the rod body (1), a first opening end of the guide channel (3) is located on the end face of the top end of the rod body (1), a second opening end of the guide channel (3) is located on the lower portion of the outer side face of the rod body (1), and a containing groove (4) is formed in the position, located on the second opening end, of the rod body (1);

the telescopic needle (5) is used for puncturing rat end plates and intervertebral discs, the telescopic direction of the telescopic needle (5) is perpendicular to the axis of the rod body (1), when the telescopic needle (5) is contracted, the telescopic needle (5) is located in the accommodating groove (4), and the needle point of the telescopic needle (5) is flush with the outer side face of the rod body (1);

the steel wire (6) is used for controlling the telescopic needle (5) to stretch, one end of the steel wire (6) penetrates through the guide channel (3) and is fixedly connected with the telescopic needle (5), when the steel wire (6) moves towards the direction close to the telescopic needle (5), the telescopic needle (5) extends out, and when the steel wire (6) moves towards the direction far away from the telescopic needle (5), the telescopic needle (5) contracts;

the wire feeding mechanism comprises a first shell (7) and a wire feeding assembly arranged in the first shell (7) and used for controlling the steel wire (6) to move towards the direction far away from or close to the telescopic needle (5), the first shell (7) is fixedly connected with the top end of the rod body (1), the guide channel (3) is communicated with the inside of the first shell (7), and the wire feeding assembly is fixedly connected with the steel wire (6);

the rotating mechanism comprises a second shell (8) and a rotating assembly arranged in the second shell (8) and used for driving the rod body (1) to rotate, and the rod body (1) penetrates through the second shell (8) and is in rotating connection with the second shell (8).

2. The rat endplate and intervertebral disc puncturing device according to claim 1, wherein the wire feeding assembly comprises a first driving gear (9), a first transmission gear set (10), a slider (11) and a first driving device (12), the first driving gear (9) and the first transmission gear set (10) are both rotatably connected to the first housing (7), the slider (11) is located above the rod (1) and slidably connected to the first housing (7), the sliding direction is along the axial direction of the rod (1), a rack (13) is fixedly disposed on the slider (11) along the axial direction of the rod (1), the first driving gear (9) is in transmission connection with the rack (13) through the first transmission gear set (10), and the first driving device (12) is in transmission connection with the first driving gear (9), the steel wire (6) is fixedly connected with the sliding block (11).

3. The rat endplate and intervertebral disc puncturing device according to claim 1, wherein the rotating assembly includes a second driving gear (14), a second transmission gear set (15), a driven gear (16) and a second driving device (17), the driven gear (16) is fixedly connected to the rod body (1), an axis of the driven gear (16) coincides with an axis of the rod body (1), the second driving gear (14) is in transmission connection with the driven gear (16) through the second transmission gear set (15), and the second driving device (17) is in transmission connection with the second driving gear (14).

4. The rat endplate and intervertebral disc puncturing device according to claim 2, wherein the retractable needle (5) comprises a plurality of sleeves which are nested with each other, the outer side surface of the outermost sleeve is fixedly connected with the inner side surface of the accommodating groove (4), the head of the innermost sleeve is a needle point, and the tail end of the innermost sleeve is fixedly connected with the steel wire (6).

5. The rat endplate and intervertebral disc puncturing device according to claim 4, wherein the steel wire (6) is a hollow structure, one end of the steel wire (6) is provided with an injection port (18), one end of the steel wire (6) provided with the injection port (18) penetrates through the sliding block (11) and extends to the outside of the first housing (7), the innermost sleeve of the telescopic needle (5) is hollow, and the inside of the steel wire (6) is communicated with the inside of the innermost sleeve.

6. The rat endplate and intervertebral disc puncturing device according to claim 2, wherein the first driving device (12) is a first rocking handle, one end of the first rocking handle extends into the first housing (7) and is in transmission connection with the first driving gear (9), and the other end of the first rocking handle is located outside the first housing (7), or the first driving device (12) is a first motor arranged inside the first housing (7) and is in transmission connection with the first driving gear (9).

7. The rat endplate and intervertebral disc puncturing device according to claim 3, wherein the second driving device (17) is a second rocking handle, one end of the second rocking handle extends into the second housing (8) and is in transmission connection with the second driving gear (14), and the other end of the second rocking handle is located outside the second housing (8), or the second driving device (17) is a second motor arranged inside the second housing (8) and is in transmission connection with the second driving gear (14).

8. A rat endplate and intervertebral disc puncturing device according to claim 5, wherein two guiding channels (3) are arranged inside the rod body (1), the second open ends of the two guiding channels (3) are symmetrically arranged along the central axis of the rod body (1), the accommodating grooves (4) are arranged at the position of each second open end of the rod body (1), the telescopic needles (5) are arranged in each accommodating groove (4), and the steel wire (6) is arranged in each guiding channel (3).

9. The rat endplate and intervertebral disc puncturing device according to claim 1, wherein the rod (1) is provided with a marking line (19) on the outside for marking the position of the retractable needle (5).

10. The rat endplate and intervertebral disc puncturing device according to claim 8, wherein the first housing (7) is provided with a fixation hole (20) for connection with the injection port (18).

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