Angle-adjustable spinal minimally invasive channel rod placer

Abstract

The present application relates to the technical field of medical devices, and particularly relates to an angle-adjustable rod placing device for a spinal minimally invasive pipeline. The rod placing device comprises a core rod, an inner rod, an outer sleeve and a clamping mechanism, wherein: the core rod, the inner rod and the outer sleeve are sequentially sleeved from inside to outside; the inner rod is fixedly arranged on a base; the core rod can rotate circumferentially along the axis of the inner rod, both ends of the core rod pass through the inner rod, and the end of the core rod away from the base is provided as a flat head; the outer sleeve can move forward and backward along the axis of the inner rod, and both ends of the inner rod extend out of both ends of the outer sleeve; the clamping mechanism comprises two ear plates connected to the end of the outer sleeve away from the base, a push block hinged to the end of the inner rod away from the base, clamping jaws hinged to both sides of the push block, and a push plate hinged between the push block and the ear plates. The present application enables the rod to extend close to the extension direction of the rod placing device when the rod is implanted into the spinal minimally invasive pipeline, and the rod can be adjusted to rotate a certain angle when placed into the target position, so that the rod is aligned with the U-shaped groove of the pedicle and is conveniently installed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and particularly relates to an angle-adjustable rod placing device for a minimally invasive spinal canal. BACKGROUND

[0002] When a titanium alloy rod is implanted in a minimally invasive spinal canal, the conventional rod placing device often cannot be put into the rod due to the limited space. Therefore, how to provide an angle-adjustable rod placing device for a minimally invasive spinal canal is a research topic in the field, which can make the rod enter the canal in a vertical state when the rod placing device enters the canal, rotate a certain angle in the body when entering the upper part of the pedicle, align the rod with the U-shaped groove of the pedicle, and then place the rod in the U-shaped groove of the pedicle. SUMMARY

[0003] The present application aims to provide an angle-adjustable rod placing device for a minimally invasive spinal canal, which overcomes the shortcomings of the prior art, and makes the rod close to the extension direction of the rod placing device when implanted in a minimally invasive spinal canal, and can be adjusted to rotate a certain angle when placed in the target position, so that the rod is aligned with the U-shaped groove of the pedicle and is conveniently installed.

[0004] The technical scheme adopted by the present application to solve the technical problem is:

[0005] An angle-adjustable rod placing device for a minimally invasive spinal canal, comprising a core rod, an inner rod, an outer sleeve, a base and a clamping mechanism, wherein:

[0006] The core rod, the inner rod and the outer sleeve are sequentially sleeved from inside to outside; the inner rod is fixedly arranged on the base, and the position of the inner rod as a reference is unchanged;

[0007] The core rod can rotate circumferentially along the axis of the inner rod, both ends of the core rod pass through the inner rod, and the end of the core rod away from the base is provided with a flat head;

[0008] The outer sleeve can move forward and backward along the axis of the inner rod, and both ends of the inner rod protrude from both ends of the outer sleeve;

[0009] The clamping mechanism comprises two ear plates connected to the end of the outer sleeve away from the base, a push block hinged to the end of the inner rod away from the base, clamping jaws hinged to both sides of the push block, and a push plate hinged between the push block and the ear plate; when moving along the axis of the inner rod, the ear plate drives the push plate to move, the push plate pulls or pushes the push block to change the angle thereof, the push block clamps the rod, and the rod rotates when the angle of the push block rotates; further description of this structure is as follows: wherein,

[0010] One end of the push block is sleeved on one end of the inner rod, a first opening is formed on the push block, a second opening is formed on the inner rod, the positions of the first opening and the second opening correspond to each other when the push block is sleeved on the inner rod, and a first pin shaft is arranged between the first opening and the second opening, the push block is hinged with the inner rod through the first pin shaft, the flat head of the core rod is in contact with the first pin shaft, different sides of the flat head are in contact with the first pin shaft when the core rod rotates, the first pin shaft is pushed out or retracted with the inner cavity of the inner rod as a reference, one end of the push block close to the ear plate is connected with the push plate, the ear plate pushes the push plate when the outer sleeve moves towards the flat head of the core rod, the push plate pushes the push block, and the push block rotates by α degrees along the hinge end of the first pin shaft, for example, α degrees can be 90°, that is, the extension direction of the rod is basically the same as the extension direction of the inner rod of the rod placing device when the rod is placed, the space occupation ratio is reduced, and the rod is rotated by 90° after being placed in the target position, and is aligned with the U-shaped groove of the pedicle screw.

[0011] One side of the push block is connected with a clamping plate for accommodating the minimally invasive rod, a clamping jaw is hinged on the clamping plate, the placement direction of the rod is basically consistent with the extension direction of the inner rod when the minimally invasive rod is placed on the clamping plate, at this time, the clamping jaw is located on both sides of the rod and clamps the side surface of the rod, the clamping jaw is in contact with the first pin shaft, the clamping angle of the clamping jaw is adjusted through the first pin shaft when the core rod rotates, and the rod is rotated to be aligned with the U-shaped groove of the pedicle screw after being placed in the target position, and then the core rod is rotated to release the rod from the clamping plate, so that the rod placing device can be withdrawn.

[0012] Further, two clamping plates are arranged along the axial direction of the inner rod, and an arc-shaped clamping groove is arranged at the end of the clamping plate away from the inner rod, so as to facilitate stable placement of the rod.

[0013] Further, a second pin shaft parallel to the inner rod is arranged between the two clamping plates, the clamping jaw comprises a first clamping plate and a second clamping plate, end faces of the first clamping plate and the second clamping plate facing the second pin shaft are both provided with a hinge plate, the first clamping plate and the second clamping plate are respectively located on both sides of the second pin shaft and are hinged with the second pin shaft through the hinge plate, and the opening angle of the first clamping plate and the second clamping plate is adjusted by the first pin shaft and the flat head of the core rod.

[0014] Further, the first pin shaft is in contact with the first clamping plate or the second clamping plate corresponding to the position of the first pin shaft.

[0015] Further, an empty slot is formed on the flat head of the core rod to form a retraction space, so as to facilitate smooth rotation of the core rod when the core rod rotates.

[0016] Further, the base comprises a base body and a first handle, the base body is provided with a first through hole, the inner rod is fixed in the first through hole, and the core rod passes through the first through hole, and the part passing out of the first through hole is used as a holding end to rotate the core rod, so as to affect the first pin shaft through the flat head, and then adjust the opening and closing of the clamping jaw.

[0017] Further, the end of the core rod penetrating the first through hole is provided with a rotation adjusting block, and the core rod is rotated circumferentially through the rotation adjusting block.

[0018] Further, an arc-shaped slot is formed in the base body, the rotation adjusting block is accommodated in the arc-shaped slot, and at least part of the outer wall of the rotation adjusting block is matched with the shape of the arc-shaped slot, so that the core rod is conveniently rotated.

[0019] Further, a second through hole is also formed in the base body, the second through hole can be a blind hole, and the end of the outer sleeve close to the base is connected with an external extension rod parallel to the outer sleeve, the external extension rod penetrates into the second through hole, and the external extension rod provides a stable guiding effect for the forward and backward movement of the outer sleeve.

[0020] Further, a long-strip-shaped opening is arranged on the base body, the long-strip-shaped opening is parallel to and communicates with the second through hole, a third pin shaft capable of sliding along the long-strip-shaped opening is arranged in the long-strip-shaped opening, one end of the third pin shaft is fixedly connected with the external extension rod, and the other end of the third pin shaft is sleeved with the long circular hole on the second handle, the second handle is hinged on the base body, the second handle is connected with the first handle through a spring, the first handle and the second handle are gripped, the spring is compressed when the first handle and the second handle are gripped tightly, the second handle drives the third pin shaft to move along the second through hole, and then the outer sleeve is driven to move along the axis direction of the inner rod.

[0021] The angle-adjustable spinal minimally invasive pipeline rod placer has the following advantages compared with the prior art: the direction of the rod is always the same as the extension direction of the rod placer when the rod is placed in the spinal minimally invasive pipeline, the rod and the rod placer are close to each other, the rod can be rotated by a certain angle when the rod is placed in the target position, the rod is aligned with the U-shaped groove of the pedicle, the rod is placed in the U-shaped groove, the rod is loosened by rotating the core rod, and then the rod placer is withdrawn, the whole process is convenient to operate, the rod placement space is saved, and the smooth operation of the surgery is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the rod placed in the target position and rotated by 90 degrees.

[0023] Figure 2 It is a structure schematic view of the rod placed in the target position and rotated by 90 degrees.

[0024] Figure 3 It is a structure sectional view of the rod placed in the target position and rotated by 90 degrees.

[0025] Figure 4 It is a structure schematic view of the rod placed in the target position and rotated by 90 degrees.

[0026] Figure 5 It is a structure schematic view of the rod placed in the target position and rotated by 90 degrees.

[0027] Figure 6The explosion structure schematic diagram of the clamping mechanism of the present application is shown in the figure;

[0028] Wherein, 1 core rod, 11 flat head, 12 air slot, 13 rotation adjusting block, 2 inner rod, 3 outer sleeve, 4 base, 41 base body, 42 first handle, 43 arc-shaped slot, 44 first perforation, 45 second perforation, 46 external extension rod, 47 long strip-shaped opening, 48 third pin shaft, 49 second handle, 410 spring, 5 clamping mechanism, 51 ear plate, 52 push block, 53 clamping jaw, 54 push plate, 55 first pin shaft, 56 clamping plate, 57 arc-shaped clamping slot, 58 second pin shaft, 6 rod, 7 pedicle screw. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0030] As Figures 1-6 shown in the embodiments, an angle-adjustable spinal minimally invasive conduit rod placer comprises a core rod 1, an inner rod 2, an outer sleeve 3, a base 4 and a clamping mechanism 5, wherein:

[0031] The core rod 1, the inner rod 2 and the outer sleeve 3 are sequentially sleeved from inside to outside; the inner rod 2 is fixedly arranged on the base 4, and the position of the inner rod 2 is invariable as a reference;

[0032] The core rod 1 can be circumferentially rotated along the axis of the inner rod 2, both ends of the core rod 1 are arranged to pass through the inner rod 2, and the end of the core rod 1 away from the base 4 is arranged as a flat head 11;

[0033] The outer sleeve 3 can be moved forward and backward along the axis of the inner rod 2, and both ends of the inner rod 2 are arranged to protrude from both ends of the outer sleeve 3;

[0034] The clamping mechanism 5 comprises two ear plates 51 connected to the end of the outer sleeve 3 away from the base 4, a push block 52 hingedly connected to the end of the inner rod 2 away from the base 4, clamping jaws 53 hingedly connected to both sides of the push block 52 and a push plate 54 hingedly connected between the push block 52 and the ear plate 51, when the ear plate 51 is moved along the axis of the inner rod 2, the push plate 54 is moved, the push plate 54 pulls or pushes the push block 52 to change the angle of the push block 52, the push block 52 clamps a rod 6, and when the angle of the push block 52 is rotated, the rod 6 is rotated, and the structure is further described as follows: wherein,

[0035] One end of the push block 52 is sleeved on one end of the inner rod 2, a first opening is formed on the push block 52, a second opening is formed on the inner rod 2, the positions of the first opening and the second opening correspond to each other when the push block 52 is sleeved on the inner rod 2, and a first pin shaft 55 is arranged between the first opening and the second opening, the push block 52 is hinged with the inner rod 2 through the first pin shaft 55, the first pin shaft 55 is in contact with the flat head 11 of the core rod 1, different side surfaces of the flat head 11 are in contact with the first pin shaft 55 when the core rod 1 rotates, and the first pin shaft 55 is pushed out or retracted with the inner cavity of the inner rod 2 as a reference, one end of the push block 52 close to the ear plate 51 is connected with the push plate 54, the ear plate 51 pushes the push plate 54 when the outer sleeve 3 moves towards the flat head 11 of the core rod 1, the push plate 54 pushes the push block 52, and the push block 52 rotates by an angle α along the hinged end of the first pin shaft 55, for example, the angle α can be 90°, that is, the extension direction of the rod 6 is basically the same as the extension direction of the inner rod 2 of the rod placing device when the rod is placed, the space occupation ratio is reduced, and the rod is rotated by 90° after being placed in a target position and is aligned with the U-shaped groove of the pedicle screw;

[0036] One side of the push block 52 is connected with a clamping plate 56 for accommodating the minimally invasive rod, the clamping plate 56 is hinged with a clamping jaw 53, the placement direction of the rod is basically consistent with the extension direction of the inner rod 2 when the minimally invasive rod is placed on the clamping plate 56, at this time, the clamping jaw 53 is located on both sides of the rod and clamps the side surface of the rod, the clamping jaw 53 is in contact with the first pin shaft 55, the clamping angle of the clamping jaw 53 is adjusted through the first pin shaft 55 when the core rod 1 rotates, and the rod is rotated to be aligned with the U-shaped groove of the pedicle screw 7 after being placed in a target position and is then accessed, and then the core rod 1 is rotated to release the rod clamped by the clamping plate, so that the rod placing device can be withdrawn.

[0037] In the embodiment, two clamping plates 56 are arranged along the axial direction of the inner rod 2, and an arc-shaped clamping groove 57 is arranged at an end of the clamping plate 56 away from the inner rod 2, so as to facilitate stable placement of the rod 6.

[0038] In the embodiment, a second pin shaft 58 parallel to the inner rod 2 is arranged between the two clamping plates 56, the clamping jaw 53 includes a first clamping plate and a second clamping plate, end faces of the first clamping plate and the second clamping plate facing the second pin shaft 58 are both provided with a hinge plate, the first clamping plate and the second clamping plate are respectively located on both sides of the second pin shaft 58 and are hinged with the second pin shaft 58 through the hinge plates, and the opening angle of the first clamping plate and the second clamping plate is adjusted by the first pin shaft 55 and the flat head 11 of the core rod 1.

[0039] In the embodiment, the first pin shaft 55 is in contact with the first clamping plate or the second clamping plate corresponding to the position of the first pin shaft 55.

[0040] In the embodiment, a hollow groove 12 is formed on the flat head 11 of the core rod 1 to form a retraction space, so as to facilitate smooth rotation of the core rod 1.

[0041] In the embodiment, the base 4 comprises a base body 41 and a first handle 42, the base body 41 is provided with a first through hole 44, the inner rod 2 is fixed in the first through hole 44, and the core rod 1 passes through the first through hole 44, and the part of the core rod 1 passing out of the first through hole 44 is used for rotating the core rod 1 as a holding end, so as to affect the first pin shaft 55 through the flat head 11, and then adjust the opening and closing of the clamping jaw 53.

[0042] In the embodiment, the end of the core rod 1 passing out of the first through hole 44 is provided with a rotating adjusting block 13, and the core rod 1 is rotated in the circumferential direction through the rotating adjusting block 13.

[0043] In the embodiment, the base body 41 is provided with an arc-shaped slot 43, the rotating adjusting block 13 is accommodated in the arc-shaped slot 43, and at least part of the outer wall of the rotating adjusting block 13 is matched with the shape of the arc-shaped slot 43, so as to facilitate the rotation of the core rod 1.

[0044] In the embodiment, the base body 41 is further provided with a second through hole 45, one end of the outer sleeve 3 close to the base 4 is connected with an external extension rod 46 parallel to the outer sleeve 3, the external extension rod 46 passes into the second through hole 45, and the external extension rod 46 provides a stable guiding action for the forward and backward movement of the outer sleeve 3.

[0045] In the embodiment, the base body 41 is provided with a long-strip-shaped opening 47, the long-strip-shaped opening 47 is parallel to and communicated with the second through hole 45, the long-strip-shaped opening 47 is provided with a third pin shaft 48 capable of sliding along the long-strip-shaped opening, one end of the third pin shaft 48 is fixedly connected with the external extension rod 46, the other end is sleeved with a long circular hole on a second handle 49, the second handle 49 is hinged on the base body 41, the second handle 49 is connected with the first handle 42 through a spring 410, the first handle 42 and the second handle 49 are held, the spring 410 is compressed when the first handle 42 and the second handle 49 are held tightly, the second handle 49 drives the third pin shaft 48 to move along the second through hole 45, and then drives the outer sleeve 3 to move along the axis direction of the inner rod 2.

[0046] The above specific embodiments are only specific cases of the application, and the patent protection scope of the application includes but is not limited to the product forms and styles of the above specific embodiments, and any appropriate changes or modifications made by any ordinary skilled person in the art to the application meet the patent protection scope of the application.

Claims

1. An angle adjustable spinal minimally invasive corridor rod placer, characterized in that: The application relates to a micro-invasive rod rotating device, which comprises a core rod, an inner rod, an outer sleeve and a clamping mechanism, wherein: The core rod, the inner rod and the outer sleeve are sequentially sleeved from inside to outside; the inner rod is fixedly arranged on a base; The core rod can rotate circumferentially along the axis of the inner rod, both ends of the core rod are arranged to pass through the inner rod, and the end of the core rod away from the base is arranged as a flat head; The outer sleeve can move forward and backward along the axis of the inner rod, and both ends of the inner rod are arranged to protrude from both ends of the outer sleeve; The clamping mechanism comprises two ear plates connected to the end of the outer sleeve away from the base, a push block hinged to the end of the inner rod away from the base, clamping claws hinged to both sides of the push block and a push plate hinged between the push block and the ear plate; wherein: One end of the push block is sleeved on one end of the inner rod, a first opening is arranged on the push block, a second opening is arranged on the inner rod, the positions of the first opening and the second opening correspond to each other when the push block is sleeved on the inner rod, a first pin shaft is arranged between the first opening and the second opening, the first pin shaft is in contact with the flat head of the core rod, the end of the push block close to the ear plate is connected with the push plate, and the ear plate pushes the push plate and the push plate pushes the push block when the outer sleeve moves towards the flat head of the core rod, so that the push block rotates by alpha degrees along the first pin shaft; One side of the push block is connected with a clamping plate used for accommodating the micro-invasive rod, the clamping plate is hinged with the clamping claws, the clamping claws clamp the side of the rod when the micro-invasive rod is arranged on the clamping plate, the clamping claws are in contact with the first pin shaft, and the flat head adjusts the clamping angle of the clamping claws through the first pin shaft when the core rod rotates.

2. The angle adjustable spinal minimally invasive corridor rod placer according to claim 1, characterized in that: Two clamping plates are arranged at intervals along the axis of the inner rod, and the end of the clamping plate away from the inner rod is arranged with an arc-shaped clamping groove.

3. The angle adjustable spinal minimally invasive corridor rod placer according to claim 2, characterized in that: A second pin shaft parallel to the inner rod is arranged between the two clamping plates, the clamping claws comprise a first clamping plate and a second clamping plate, the end faces of the first clamping plate and the second clamping plate facing the second pin shaft are both arranged with hinged plates, and the first clamping plate and the second clamping plate are respectively arranged on both sides of the second pin shaft and are hinged to the second pin shaft through the hinged plates.

4. The angle adjustable spinal minimally invasive corridor rod placer according to claim 3, characterized in that: The first pin shaft is in contact with the first clamping plate or the second clamping plate corresponding to the position of the first pin shaft.

5. The angle adjustable spinal minimally invasive corridor rod placer of claim 1, wherein: An air slot is arranged on the flat head of the core rod.

6. The angle adjustable spinal minimally invasive channel rod placer according to any one of claims 1-5, characterized in that: The base comprises a base body and a first handle, the base body is arranged with a first through hole, the inner rod is fixed in the first through hole, and the core rod passes through the first through hole.

7. The angle adjustable spinal minimally invasive corridor rod placer according to claim 6, characterized in that: One end of the core rod passing through the first through hole is arranged with a rotating adjusting block.

8. The angle adjustable spinal minimally invasive corridor rod placer according to claim 7, characterized in that: An arc-shaped slot is arranged on the base body, the rotating adjusting block is arranged in the arc-shaped slot, and at least part of the outer wall of the rotating adjusting block is matched with the shape of the arc-shaped slot.

9. The angle adjustable spinal minimally invasive corridor rod placer of claim 6, wherein: The base body is further arranged with a second through hole, the end of the outer sleeve close to the base is connected with an external extension rod parallel to the outer sleeve, and the external extension rod passes into the second through hole.

10. The angle adjustable spinal minimally invasive corridor rod placer according to claim 9, characterized in that: The base body is arranged with an elongated opening, the elongated opening is parallel to and communicated with the second through hole, a third pin shaft capable of sliding along the elongated opening is arranged in the elongated opening, one end of the third pin shaft is fixedly connected with the external extension rod, the other end is sleeved with a long circular hole on the second handle, the second handle is hinged on the base body, and the second handle and the first handle are connected through a spring.

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