CN109700571B

CN109700571B - Conveyor and conveying system thereof

Info

Publication number: CN109700571B
Application number: CN201811641345.XA
Authority: CN
Inventors: 张军强
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2021-05-25
Anticipated expiration: 2038-12-29
Also published as: CN109700571A

Abstract

The invention discloses a conveyor, which comprises a guide rod and a sliding handle sleeved on the guide rod, wherein the outer wall of the guide rod is provided with at least two first engaging structures at intervals along the axial direction of the guide rod, the inner wall of the sliding handle is provided with at least one second engaging structure, the sliding handle is rotated towards the first direction along the circumferential direction of the guide rod until the sliding handle is axially static relative to the guide rod when the at least two first engaging structures are engaged with the at least one second engaging structure; rotating the sliding handle in a second direction along the circumference of the guide rod until the sliding handle is axially movable relative to the guide rod when the at least two first engaging structures are disengaged from the at least one second engaging structure; the first direction is the same or opposite to the second direction. The conveyor is simple in structure and convenient to operate, can realize gradual release of the support, can ensure safe and reliable support release in the release process of the support, reduces operation risks, and improves the safety of clinical operations.

Description

Conveyor and conveying system thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to conveying of an interventional medical instrument, and particularly relates to a conveyor and a conveying system thereof.

Background

In recent years, interventional therapy for cardiovascular diseases has become an important means for curing patients. With the continuous development of interventional technology, the advantages of using a covered stent for treating aortic aneurysm and arterial dissection diseases are prominent day by day, the covered stent is an artificial blood vessel which is adaptive to the size of the blood vessel and mainly comprises a covering membrane and a stent for supporting the covering membrane, the covering membrane is generally made of terylene or e-PTFE membrane, and the supporting stent is mainly woven by stainless steel wires or nickel-titanium alloy wires. The use process of the covered stent is that the stent is firstly compressed into a sheath canal cavity of a stent conveyor, a blood vessel is generally punctured at the position of a femoral artery or an iliac artery, a guide wire is utilized to establish a track, the conveyor establishes a conveying path through the iliac artery, an abdominal aorta, a thoracic aorta, an aortic arch and an ascending aorta, the conveying path is further conveyed to a lesion designated position, then the stent is released, the stent is tightly attached to the wall of an aneurysm after being released and opened, blood flow and the lesion position are isolated by a covering film of the stent, the impact of the blood flow on the aneurysm wall of the lesion position is eliminated, a channel for normal blood circulation is established, and then the guide wire is withdrawn and the conveyor, so that the.

In the prior art, the stent system is released in a manner that a covered stent is conveyed to a preassigned position of hemangioma for positioning through a conveyor, then a sheath tube is withdrawn for releasing the covered stent, and the covered stent is completely released and opened. However, in the clinic of implanting a stent graft system, the stent graft system includes a plurality of stent grafts and needs to be implanted one by one, in order to ensure that the whole stent graft system is in a safe and effective state, the stent graft system which is implanted first often needs to be partially released, the position and the state of the partially released stent graft often need to be locked, then other stent grafts are performed, and after the other stent grafts are implanted, the stent graft which is implanted first is unlocked, and the safe and effective release is continued.

However, in the prior art, the structure of the conveyor cannot realize gradual release of the stent graft, and the stent graft is positioned and locked in the release process of the stent graft, so that the clinical use requirements cannot be effectively met.

Disclosure of Invention

The invention aims to provide a conveyor and a conveying system thereof, the conveyor can realize gradual release of implants such as a stent in the release process, simultaneously ensure the safety and the effectiveness of the whole release process, can realize the positioning and locking of the release of the stent after the release of the stent part, has safe and reliable positioning, and can safely and effectively continue to release unreleased parts of the stent after the release, the positioning and locking and unlocking of the stent, thereby improving the convenience and the reliability in the clinical operation process, further reducing the operation risk and improving the safety of the clinical operation, and the invention aims to realize the following technical scheme:

the invention provides a conveyor, which comprises a guide rod and a sliding handle sleeved on the guide rod, wherein the outer wall of the guide rod is provided with at least two first engaging structures at intervals along the axial direction of the guide rod, the inner wall of the sliding handle is provided with at least one second engaging structure, the sliding handle is rotated towards the first direction along the circumferential direction of the guide rod until the sliding handle is axially static relative to the guide rod when the at least two first engaging structures are engaged with the at least one second engaging structure; rotating the sliding handle in a second direction along the circumference of the guide rod until the sliding handle is axially movable relative to the guide rod when the at least two first engaging structures are disengaged from the at least one second engaging structure; wherein the first direction is the same as or opposite to the second direction.

The invention also provides a conveying system, which comprises the implant and the conveyor.

Compared with the prior art, the conveyor provided by the invention has the following beneficial effects:

the support can be gradually released by controlling the axial movement of the sliding handle relative to the guide rod, the position of the sliding handle is positioned by utilizing the engagement of at least two first engagement structures on the outer wall of the guide rod and at least one second engagement structure arranged in the sliding handle, so that the positioning locking of the release of the support is realized, the continuous release of the support can be realized by releasing the engagement of the at least two first engagement structures and the at least one second engagement structure, and the release length of the support in the release process is controllable. The conveyor is simple in structure, convenient and fast to operate in the using process, and meanwhile, the support can be gradually released, and the safety and reliability of the support release can be guaranteed in the releasing process of the support, so that the operation risk is reduced, and the safety of clinical operations is improved.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view of an external structure of a conveyor provided by the present invention;

FIG. 2 is a schematic view of the conveyor of the first embodiment of the invention with the frame fully compressed;

FIG. 3 is a schematic view of the conveyor of the first embodiment of the invention with the frame in a semi-released state;

FIG. 4 is a schematic view of the conveyor of the first embodiment of the invention with the frame fully released;

FIG. 5 is a schematic view showing the construction of a sheath of the conveyor of the first embodiment;

FIG. 6 is a partial schematic view of the guide bar of the conveyor of the first embodiment;

FIG. 7 is a partial schematic structural view of the sliding handle of the first embodiment of the carrier;

FIG. 8 is a schematic view (partially cut away) of the first and second engagement structures of the conveyor of the first embodiment when not engaged;

FIG. 9 is a schematic view (in radial cross section along the guide rods) of the first embodiment of the conveyor apparatus with the first and second engagement structures disengaged;

FIG. 10 is a schematic view (partially in section) of the first embodiment of the conveyor showing the first and second engagement structures engaged;

FIG. 11 is a schematic view (in radial cross section along the guide rods) of the first embodiment of the conveyor apparatus with the first and second engagement structures engaged;

FIG. 12 is a partial schematic view of the guide bar of the conveyor of the second embodiment;

FIG. 13 is a partial schematic structural view of the sliding handle of the second embodiment of the carrier;

FIG. 14 is a schematic view (partially cut away) of the first and second engagement structures of the conveyor of the second embodiment when not engaged;

FIG. 15 is a schematic view (partially in section) of the first engagement structure of the conveyor of the second embodiment when engaged with the second engagement structure;

FIG. 16 is a partial schematic view of the guide bar of the conveyor of the third embodiment;

FIG. 17 is a partial schematic view of the slide handle of the transport apparatus of the third embodiment;

FIG. 18 is a schematic illustration (partially broken away) of the third embodiment of the conveyor with the first and second engagement structures disengaged;

fig. 19 is a schematic view (partially cut away) of the third embodiment of a conveyor with the first and second engagement structures engaged.

Reference numerals:

100 is a conveyor, 200 is a bracket;

1 is a sliding handle, 10 is a second meshing structure, 11 is a tooth-shaped structure, 111 is a first limiting block, 112 is a second limiting groove, 12 is a baffle, 121 is a first baffle, and 122 is a second baffle;

2, a guide rod, 21, 22, a first engaging structure, 221, a first limiting groove, 222, a second limiting block, 23, a circumferential sliding groove, 24, a first limiting block and 25, wherein the guide rod, the axial sliding groove, the first engaging structure, the second limiting block, the first limiting block and the second limiting block are respectively arranged in the guide rod;

3 is a fixed handle;

4 is a sheath, 41 is a tube body part, 42 is a joint part, and 43 is a connecting part;

5 is a push rod;

6 is a sheath-core tube;

and 7 is a terminal.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the field of interventional medical devices, the end of a medical device implanted in a human or animal body closer to an operator is generally referred to as the "proximal end", the end farther from the operator is referred to as the "distal end", and the "proximal end" and the "distal end" of any component of the medical device are defined according to this principle. "axial" generally refers to the length of the medical device as it is being delivered, and "radial" generally refers to the direction of the medical device perpendicular to its "axial" direction, and defines both "axial" and "radial" directions for any component of the medical device in accordance with this principle.

The delivery device of the present invention can be used for delivery of, but is not limited to, stents, occluders and other interventional implants, and the structure and function of the delivery device of the present invention will be described in detail herein by way of example of a stent graft. The covered stent in the invention refers to a structure of a bare stent with a surface covered with a thin film, and the bare stent refers to a structure comprising a plurality of wavy rings without thin films among the wavy rings.

The technical solution of the present invention will be described in further detail with reference to specific examples.

The first embodiment:

referring to fig. 1, 6 and 7, a first embodiment provides a conveyor 100, which includes a guide rod 2 and a sliding handle 1 sleeved on the guide rod 2, wherein at least two first engaging structures 22 are arranged on an outer wall of the guide rod 2 at intervals along an axial direction of the guide rod 2, at least one second engaging structure 10 is arranged on an inner wall of the sliding handle 1, and the sliding handle 1 is rotated towards a first direction along a circumferential direction of the guide rod 2 until the sliding handle 1 is stationary relative to the axial direction of the guide rod 2 when the at least two first engaging structures 22 are engaged with the at least one second engaging structure 10; the sliding handle 1 is rotated in the second direction along the circumference of the guide bar 2 until the sliding handle 1 is axially movable relative to the guide bar 2 when the at least two first engagement structures 22 are disengaged from the at least one second engagement structure 10.

Specifically, in the present embodiment, the number of the first engaging structures 22 is plural, and each of the first engaging structures 22 is disposed at equal intervals along the axial direction of the guide rod 2, two adjacent first engaging structures surround and form a circumferential sliding groove 23 along the axial direction of the guide rod 2, the number of the second engaging structures 10 is two, the plurality of baffle plates 12 (for example, the first baffle plate 121 and the second baffle plate 122) disposed on the inner wall of the sliding handle 1 are disposed at intervals, the second engaging structure 10 includes the first baffle plate 121 and the tooth-shaped structure 11, both the first baffle plate 121 and the second baffle plate 122 are semi-annular sheet plates, and all set up on the inner wall of sliding handle 1, profile of tooth structure 11 sets up the one side that is closest to the axis of sliding handle 1 on first baffle 121, and the one end of profile of tooth structure 11 is the same level with the one end of first baffle 121, and the length of profile of tooth structure 11 is less than the length of first baffle 121, and the width of profile of tooth structure 11 equals or is close with the width of first baffle 121.

The conveying system comprises a support and a conveyor 100, when the release position of the support needs to be positioned and locked through a sliding handle 1, the sliding handle 1 is rotated towards a first direction (the first direction refers to a direction in which a second meshing structure 10 is close to each first meshing structure 22 along the circumferential direction of a guide rod 2, for example, the clockwise direction relative to the guide rod 2), the second meshing structure 10 slides into a circumferential sliding groove 23 along the circumferential direction of the guide rod 2, and a tooth-shaped structure 11 is accommodated in the circumferential sliding groove 23, so that the second meshing structure 10 is meshed with two adjacent first meshing structures 22 where the circumferential sliding groove 23 is located, the sliding handle 1 cannot move axially relative to the guide rod 2, and at the moment, the sliding handle 1 is in a locked and positioned state. When the locking state of the slide handle 1 needs to be released, the slide handle 1 is rotated in a second direction (the second direction refers to a direction in which the second engagement structure 10 is away from each first engagement structure 22, for example, the direction opposite to the first direction), two adjacent first engagement structures 22 and the second engagement structure 10 are away from each other, and when any part of the second engagement structure 10 is not located in the circumferential sliding groove 23, the two adjacent first engagement structures 22 and the second engagement structure 10 are disengaged, and at this time, the slide handle 1 can move in the axial direction of the guide rod 2.

The bracket 200 can be released through the axial movement of the sliding handle 1 relative to the guide rod 2, and the positioning and locking of the sliding handle 1 are realized by the engagement of the first engaging structure 22 and two adjacent second engaging structures 10, so that the positioning and locking of the bracket 200 can be released; the continuous release of the support 200 can be realized by releasing the engagement between the first engaging structure 22 and the two adjacent second engaging structures 10, the conveyor 100 has a simple structure, is convenient and fast to operate in the using process, can realize the gradual release of the support 200, and can ensure the safety and reliability of the release of the support 200 in the releasing process of the support 200, thereby reducing the operation risk and improving the safety of clinical operations.

Each first meshing structure 22 is a toothed structure, and the length direction of each first meshing structure 22 is perpendicular to the central axis of the guide rod 2 or has an included angle smaller than 90 degrees; the longitudinal direction of the tooth structure 11 coincides with the longitudinal direction of the first meshing structure 22.

In other embodiments, the number of the second engaging structures 10 may also be one or more than two, for example, one tooth-shaped structure 11 is respectively disposed on more than two second blocking plates 122 to obtain a plurality of second engaging structures 10, and all the second engaging structures 10 are disposed at intervals along the axial direction of the sliding handle 1, and when one second engaging structure 10 is engaged with or disengaged from two adjacent first engaging structures 22, the other second engaging structures 10 are respectively engaged with or disengaged from two corresponding adjacent first engaging structures 22, thereby enhancing the positioning and locking effect of the sliding handle 1.

Referring to fig. 1 again, the conveyor 100 in this embodiment further includes an end 7, a sheath core tube 6, a push rod 5, a sheath tube 4 and a fixed handle 3, wherein the end 7, the sheath core tube 6, the push rod 5, the sheath tube 4 and the fixed handle 3 are all hollow structures with openings at two ends, a distal end of the sheath core tube 6 is coaxially communicated with a proximal end of the end 7, the push rod 5 is sleeved on the sheath core tube 6, a distal end of the sheath core tube 6 is closer to the distal end than a distal end of the push rod 5, the sheath tube 4 is sleeved on an outer side of the push rod 5, the fixed handle 3 is sleeved on an outer side of the sheath tube 4, a distal end of the guide rod 2 is coaxially and fixedly connected with a proximal end of the fixed handle 3, the sliding handle 1 is slidably sleeved on an outer side of the guide rod 2, and a proximal end of the sheath tube 4 is connected with an inner wall of the sliding, the distal end of the sheath 4 is moved toward or away from the proximal end of the tip 7.

The diameter of the proximal end of the tip 7 is larger than the outer diameter of the sheath core tube 6, the outer diameter of the push rod 5 is larger than the outer diameter of the sheath core tube 6, and the proximal end of the tip 7, the outer circumferential surface of the sheath core tube 6 and the distal end of the push rod 5 form an accommodating cavity for accommodating the stent 200 in the contracted state. The length of the sheath-core tube 6 between the end head 7 and the push rod 5 is larger than or equal to the length of the bracket 200 in the contraction state.

As shown in fig. 2, when the distal end of the sheath 4 abuts against the proximal end of the tip 7, the accommodation chamber is closed, and the stent 200 is accommodated in the accommodation chamber. When the distal end of the sheath 4 is moved away from the proximal end of the tip 7 as shown in fig. 3, the accommodation chamber is partially opened and the stent 200 is partially released. When the distal end of the sheath 4 is flush with at least the distal end of the push rod 5, the accommodation chamber is fully opened, as shown in fig. 4, and the stent 200 is fully released.

Further, the second meshing structure 10 includes the first baffle 121 and the tooth-shaped structure 11, and at least one end of the first meshing structure 22 in the length direction thereof and/or at least one end of the tooth-shaped structure 11 of the second meshing structure 10 in the length direction thereof is gradually increased in width in the length direction of the tooth-shaped structure 11 of the first meshing structure 22 and/or the second meshing structure 10 from an end of the end. Specifically, as shown in fig. 6 to 8, fig. 6 is a schematic partial structure diagram of an upper half portion of the guide rod 2, and a lower half portion structure of the guide rod 2 is centrosymmetric to the upper half portion structure thereof; fig. 7 is a schematic structural diagram of one half of the sliding handle 1, and the other half has the same structure as the half, and the tooth-shaped structures of the two parts are in central symmetry. The end part of the first meshing structure 22 facing the second meshing structure 10 is a contraction structure, the end part of the tooth-shaped structure 11 facing the first meshing structure 22 is also a contraction structure, and the outer surfaces of the contraction structures are all arc surfaces, so that the second meshing structure 10 is easily meshed with the two adjacent first meshing structures 22 through the structure, the situation that the end part is collided and cannot be meshed in the meshing process is avoided, and the smooth positioning and locking of the sliding handle 1 are ensured.

When at least one part of at least one second engagement structure 10 is accommodated in a circumferential sliding groove 23 formed by two adjacent first engagement structures 22, the at least two first engagement structures 22 are engaged with the at least one second engagement structure 10; when no part of the at least one second engagement structure 10 is located within the circumferential runner 23, the at least two first engagement structures 22 are disengaged from the at least one second engagement structure 10. Specifically, as shown in fig. 10 and 11, in the present embodiment, the number of the first engaging structures 22 is multiple, the number of the second engaging structures 10 is two, the first engaging structures 22 are disposed on the outer wall of the guide rod 2, and the first engaging structures 22 protrude from the outer wall of the guide rod 2, each first engaging structure 22 is disposed at equal intervals along the length direction of the guide rod 2, a circumferential sliding groove 23 is formed in a space sandwiched by two adjacent first engaging structures 22, when the sliding handle 1 rotates in the first direction, the tooth-shaped structures 11 of the second engaging structures 10 on the sliding handle 1 enter the circumferential sliding groove 23, and two opposite side walls of two adjacent first engaging structures 22 limit the second engaging structures 10 in the axial direction of the guide rod 2, so as to achieve positioning and locking of the sliding handle 1 in the axial direction of the guide rod 2. As shown in fig. 8 and 9, when the second engaging structure 10 completely slides out of the circumferential sliding groove 23, the positioning lock of the sliding handle 1 in the axial direction of the guide rod 2 is released, and the sliding handle 1 can continue to move in the axial direction of the guide rod 2, thereby achieving the continuous release of the stent 200.

As shown in fig. 6, each of the first engaging structures 22 forms a plurality of circumferential sliding grooves 23, and each of the circumferential sliding grooves 23 is disposed at equal intervals along the length direction of the guide rod 2, so that a plurality of positioning and locking positions can be provided for the sliding handle 1 along the length direction of the guide rod 2, and thus the positioning and locking of different axial positions of the sliding handle 1 can be realized, and the requirement of clinical use can be further satisfied.

Further, one end of the at least two first engaging structures 22, which is located on the same side of the guide rod 2 in the circumferential direction, is connected to at least one first limiting member 24 disposed on the outer wall of the guide rod 2. In this embodiment, the number of the first engaging structures 22 is multiple, the first limiting members 24 are disposed along the length direction of the guide rod 2, and the first limiting members 24 respectively connect one end of two adjacent first engaging structures 22, so that one end of the circumferential sliding groove 23 formed by two adjacent first engaging structures 22, which is far away from the second engaging structure 10, is a closed structure. When the sliding handle 1 rotates the second meshing structure 10 along the first direction to mesh with the first meshing structure 22, the second meshing structure 10 is inserted into the circumferential sliding groove 23 formed by the two adjacent first meshing structures 22 until one end of the tooth-shaped structure 11 close to the first limiting part 24 abuts against the first limiting part 24, the positioning and locking of the sliding handle 1 are completed, and when the second meshing structure 10 meshes with the first meshing structure 22, the situation that the second meshing structure 10 is separated from the first meshing structure 22 due to the rotation transition of the sliding handle 1 occurs, so that the control precision and the positioning and locking effect of the sliding handle 1 are ensured. In another embodiment, if the first limiting member 24 is not provided, the second direction may also be the same direction as the first direction, for example, the second engaging structure 10 slides into the circumferential sliding groove 23 clockwise along the circumferential direction of the guide rod 2 to engage with two adjacent first engaging structures 22, and then the second engaging structure 10 slides further clockwise along the circumferential direction of the guide rod 2 to slide out of the circumferential sliding groove 23, so as to disengage with two adjacent first engaging structures 22.

With continued reference to fig. 6, at least one axial sliding groove 21 is provided along the axial direction of the guide rod 2, at least one second limiting member 25 is provided between the first engaging structure 22 and the axial sliding groove 21 on the guide rod 2, specifically, the axial sliding groove 21 is provided along the axial direction of the guide rod 2, the axial sliding groove 21 is communicated with the inside of the guide rod 2, the sheath tube 4 is connected with the sliding handle 1 through the axial sliding groove 21, the length direction of the second limiting member 25 is the same as the axial direction of the guide rod 2, and the minimum distance between the second limiting member 25 and each first engaging structure 22 along the circumferential direction of the guide rod 2 is greater than the length of the tooth-shaped structure 11. When the sliding handle 1 rotates along the second direction, the second meshing structure 10 is separated from the circumferential sliding groove 23 until the end, far away from the first limiting piece 24, of the tooth-shaped structure 11 abuts against the second limiting piece 25, at this time, the second meshing structure 10 is completely separated from the circumferential sliding groove 23, and the sliding distance of the second meshing structure 10 in the second direction can be limited by arranging the second limiting piece 25, so that the operation time is shortened, the control accuracy is improved, and the control accuracy of the sliding handle 1 is further improved.

As shown in fig. 5, the sheath tube 4 includes a tube body portion 41, a joint portion 42, and a connecting portion 43, wherein a proximal end of the tube body portion 41 is coaxially connected to a distal end of the joint portion 42, a distal end of the tube body portion 41 is fitted to an outer side of the push rod 5, the connecting portion 43 is a plate-shaped structure, the connecting portion 43 is fixedly connected to a proximal end of the joint portion 42, the connecting portion 43 is perpendicular to an outer surface of the joint portion 42, the joint portion 42 is movably disposed inside the guide rod 2, and the connecting portion 43 protrudes through the axial slide groove 21 and is axially movable along the axial slide groove 21. The first baffle 121 and the plurality of second baffles 122 are spaced apart from each other inside the slide handle 1 by a distance greater than or equal to the width of the connecting portion 43, so that the connecting portion 43 can be caught between two adjacent baffles 12. The diameter of the central hole of the first baffle 121 is larger than the diameter of the guide rod 2 and smaller than the length of the connecting portion 43, the diameter of the central hole of the second baffle 122 is larger than the diameter of the guide rod 2 and smaller than the length of the connecting portion 43, one end of the guide rod 2 sequentially passes through the central hole of the first baffle 121 and the central holes of the plurality of second baffles 122, and the connecting portion 43 extending through the axial sliding groove 21 is limited between two adjacent second baffles 122. When the sliding handle 1 moves axially along the guide rod 2, the sliding handle 1 drives the connecting part 43 to move along the axial sliding groove 21, so that the sheath tube 4 is driven, and the bracket 200 is gradually released and locked. When the sliding handle 1 rotates along the circumferential direction of the guide rod 2, the first baffle 121 and the plurality of second baffles 122 both rotate along with the sliding handle 1 relative to the connecting portion 43, and the connecting portion 43 remains stationary relative to the guide rod 2.

In this embodiment, the number of the axial sliding grooves 21 is two and is symmetrically arranged along the axial direction of the guide rod 2, the number of the connecting portions 43 is two, and the two connecting portions 43 are symmetrically arranged with respect to the joint portion 42, one connecting portion 43 extends from one of the axial sliding grooves 21, the other connecting portion 43 extends from the other axial sliding groove 21, all of the first engaging structures 22 are divided into two engaging groups, and the two engaging groups are respectively arranged corresponding to one of the axial sliding grooves 21. The number of the second engaging structures 10 is two, and the two second engaging structures 10 are respectively provided corresponding to one engaging group. The number of the second limiting members 25 is two, and the two second limiting members 25 are respectively disposed near one axial sliding groove 21. When the sliding handle 1 is positioned and locked, the sliding handle 1 rotates towards the first direction, the two second meshing structures 10 are respectively meshed with the two adjacent first meshing structures 22 in the two meshing groups, when the positioning and locking of the sliding handle 1 needs to be released, the sliding handle 1 rotates towards the second direction, the two second meshing structures 10 are respectively meshed with the two adjacent first meshing structures 22 in the two meshing groups and separated until one ends, far away from the first limiting parts 24, of the two tooth-shaped structures 11 are respectively abutted against the corresponding second limiting parts 25, so that the accuracy of the sliding handle 1 in positioning and locking is further improved, the stability and the safety reliability of the release control of the support 200 are guaranteed, the surgical risk is reduced, and the safety of clinical surgery is improved.

Further, as shown in fig. 6 and 8, at least one second stopper 25 is provided on the outer wall of the guide rod 2 at the axial edge of the axial sliding groove 21. In this embodiment, the number of the second limiting members 25 is two, the two second limiting members 25 are respectively disposed corresponding to one axial sliding slot 21, wherein the second limiting members 25 are plate-shaped structures, the second limiting members 25 are disposed along the length direction of the guide rod 2, and the shortest distance from one end of any one first meshing structure 22 in each meshing set, which is closer to the second limiting member 25, to the corresponding second limiting member 25 is greater than or equal to the length of the corresponding tooth-shaped structure 14 along the circumferential direction of the sliding handle 1. Specifically, when the sliding handle 1 is in the unlocked state, the single tooth-shaped structure 11 is located on the outer wall of the guide rod 2 between the first engaging structure 22 and the second limiting member 25 in the single engaging group, and at this time, when the sliding handle 1 moves in the axial direction of the guide rod 2, the tooth-shaped structure 11 can move axially along with the sliding handle 1. Then, when the sliding handle 1 is rotated along the first direction, the tooth-shaped structure 11 enters the circumferential sliding groove 23 between two adjacent first meshing structures 22, and two opposite side walls of the two adjacent first meshing structures 22 are meshed with the tooth-shaped structure 11, so that the sliding handle 1 is limited in the axial direction of the guide rod 2, and the bracket can be positioned and locked when being released. The second limiting piece 25 limits the tooth-shaped structure 11 in the second direction, so that the sliding handle 1 can rotate in the second direction with a fixed stroke, and the precision of the sliding handle 1 in the operation process is improved.

As shown in fig. 7 and 9, all the first engagement structures 22 and the corresponding tooth-shaped structures 11 in each engagement group are arc-shaped surfaces, and the shape, length, width, height, and the like of all the first engagement structures 22 in each engagement group are the same. Specifically, the side of each first engagement structure 22 that is far away from guide arm 2 is the arcwall face, and the radian of this arcwall face is unanimous with the radian of the outer wall of the guide arm 2 position that each first engagement structure 22 is located, and when slip handle 1 suit was in the guide arm 2 outside, the side of profile of tooth structure 11 towards guide arm 2 was the arcwall face, and the degree of curvature of this arcwall face is unanimous with the degree of curvature of the outer wall of guide arm 2, be convenient for profile of tooth structure 11 and its two adjacent first engagement structures 22 that correspond mesh along the outer wall of guide arm 2, guarantee the smooth implementation of slip handle 1 location locking.

Second embodiment:

differences between the second embodiment and the first embodiment will be described below, and descriptions of parts of the second embodiment that are the same as or similar to the first embodiment will not be repeated here.

In this embodiment, as shown in fig. 12 and 13, two first limiting grooves 221 are formed on the side walls of all the first engaging structures 22 along the length direction thereof, two first limiting blocks 111 are arranged on the side walls of all the tooth-shaped structures 11 along the length direction thereof, and when the sliding handle 1 rotates in the first direction along the circumferential direction of the guide rod 2, each first limiting block 111 is in clamping connection with a corresponding one of the first limiting grooves 221.

Specifically, the first limiting groove 221 is disposed on a side wall of the first engaging structure 22, the first limiting block 111 is disposed on a side wall of the tooth-shaped structure 11, and when the tooth-shaped structure 11 is engaged with two adjacent first engaging structures 22, the first limiting block 111 is clamped in the corresponding first limiting groove 221.

As shown in fig. 12, the number of the first limiting grooves 221 on each first engaging structure 22 is two, and the two first limiting grooves 221 are symmetrically disposed on two sides of the first engaging structure 22, respectively. As shown in fig. 13, the number of the first stoppers 111 on each tooth-shaped structure 11 is two, and the two first stoppers 111 are symmetrically and respectively disposed on two sides of the tooth-shaped structure 11.

As shown in fig. 15, when positioning and locking are required, the sliding handle 1 is rotated in a first direction, the tooth-shaped structure 11 enters the circumferential sliding groove 23 between two adjacent first engaging structures 22, and two first limiting blocks 111 on the tooth-shaped structure 11 are respectively clamped into the first limiting grooves 221 on the side walls of the two first engaging structures 22; as shown in fig. 14, when the positioning locking needs to be released, the sliding handle 1 is rotated in the second direction, the tooth-shaped structure 11 slides out from the corresponding circumferential sliding groove 23, and the first limiting block 111 is pulled out from the corresponding first limiting groove 221, so that the tooth-shaped structure 11 is meshed with and separated from the corresponding two first meshing structures 22, and the positioning locking of the bracket is released, the effectiveness of the positioning locking of the sliding handle 1 can be improved, the situation that the tooth-shaped structure 11 is easily separated from the adjacent two first meshing structures 22 when the sliding handle 1 is positioned and locked is avoided, and the safety in the releasing process of the bracket 200 is improved.

It should be noted that the maximum depth of the first limiting groove 221 is 0.1-1mm, so that the first limiting block 111 can smoothly slide into or out of the corresponding first limiting groove 221, and the smooth operation process is ensured.

The third embodiment:

differences between the third embodiment and the first embodiment will be described below, and descriptions of parts of the third embodiment that are the same as or similar to the first embodiment will not be repeated here.

As shown in fig. 16 and 17, two second limit blocks 222 are disposed on the side walls of all the first engaging structures 22 along the length direction thereof, two second limit grooves 112 are disposed on the side walls of all the tooth-shaped structures 11 along the length direction thereof, and each second limit block 222 is engaged with a corresponding one of the second limit grooves 112 when the sliding handle 1 rotates in the first direction along the circumferential direction of the guide bar 2.

Specifically, the second stoppers 222 are disposed on the side walls of the first engaging structures 22 and protrude outward, the second stopper grooves 112 are disposed on the side walls of the tooth-shaped structure 11, and when the tooth-shaped structure 11 is engaged with two adjacent first engaging structures 22, each second stopper 222 extends into a corresponding second stopper groove 112 to be clamped.

The number of the second stoppers 222 on each first engagement structure 22 is two, and the two second stoppers 222 are respectively and symmetrically disposed on two sides of one first engagement structure 22. The number of the second limiting grooves 112 on each tooth-shaped structure 11 is two, and the two second limiting grooves 112 are respectively and symmetrically arranged on two sides of one tooth-shaped structure 11.

As shown in fig. 19, when positioning and locking are required, the sliding handle 1 is rotated in the first direction, the tooth-shaped structures 11 slide into the circumferential sliding grooves 23 between two adjacent first engaging structures 22, and the second limiting blocks 222 are clamped in the corresponding second limiting grooves 112. As shown in fig. 18, when the positioning lock needs to be released, the sliding handle 1 is rotated in the second direction, the tooth-shaped structure 11 slides out from the corresponding circumferential sliding groove 23, and the second limiting block 222 is pulled out from the corresponding second limiting groove 112, so that the tooth-shaped structure 11 is meshed with and separated from the corresponding two first meshing structures 22, and the positioning lock on the bracket is released. The second limiting block 222 is matched with the second limiting groove 112 in a clamping manner, so that the effectiveness of positioning and locking of the sliding handle 1 can be improved, the situation that the tooth-shaped structure 11 is separated from the two corresponding first meshing structures 22 when the sliding handle 1 is positioned and locked is avoided, and the safety in the releasing process of the support 200 is improved.

It should be noted that the maximum depth of the second limiting groove 112 is 0.1-1mm, so as to ensure that the second limiting block 222 can smoothly slide into or out of the second limiting groove 112, and ensure that the operation process is smoothly performed.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A conveyor comprises a guide rod and a sliding handle sleeved on the guide rod, and is characterized in that at least two first engaging structures are arranged on the outer wall of the guide rod at intervals along the axial direction of the guide rod, at least one second engaging structure is arranged on the inner wall of the sliding handle, the sliding handle is rotated towards a first direction along the circumferential direction of the guide rod until the sliding handle is axially static relative to the guide rod when the at least two first engaging structures are engaged with the at least one second engaging structure; rotating the sliding handle in a second direction along the circumference of the guide rod until the sliding handle is axially movable relative to the guide rod when the at least two first engaging structures are disengaged from the at least one second engaging structure; wherein the first direction is the same as or opposite to the second direction.

2. A conveyor according to claim 1, wherein said second engagement structure comprises a baffle and a tooth-shaped structure, and at least one end of said first engagement structure and/or at least one end of said tooth-shaped structure increases in width from the end of said end along the length of said first engagement structure and/or said tooth-shaped structure.

3. The conveyor apparatus of claim 1, wherein when at least a portion of said at least one second engagement structure is received within a circumferential channel defined by two adjacent first engagement structures, said at least two first engagement structures engage said at least one second engagement structure;

when any part of the at least one second engagement structure is not positioned in the circumferential sliding groove, the at least two first engagement structures are disengaged from the at least one second engagement structure.

4. A conveyor according to claim 3, wherein each of said at least two first engagement formations is connected at one end to at least one first stop member provided on an outer wall of said guide rod.

5. A conveyor according to claim 1, wherein at least one axial runner is provided in the axial direction of said guide rod, and at least one second stop member is provided between said at least two first engagement structures and said axial runner.

6. Conveyor according to claim 5, characterized in that said at least one second stop is provided on the outer wall of said guide rod at the axial edge of said axial runner.

7. The conveyor according to claim 5, wherein said second engaging structure comprises a baffle and a tooth-shaped structure, and a shortest distance from an end of said at least two first engaging structures closer to said second limiting member is greater than or equal to a length of said tooth-shaped structure in a circumferential direction of said sliding handle.

8. The conveyor according to claim 1, wherein the second meshing structures comprise a baffle and a tooth-shaped structure, at least one first limiting groove is formed in the side wall of each of the at least two first meshing structures along the length direction of the first meshing structure, at least one first limiting block is arranged on the side wall of each of the at least one second meshing structure along the length direction of the second meshing structure, and when the sliding handle rotates towards the first direction along the circumferential direction of the guide rod, the at least one first limiting block is clamped with the at least one first limiting groove.

9. The conveyor according to claim 1, wherein the second engaging structure comprises a baffle and a tooth-shaped structure, at least one second limiting block is arranged on the side walls of the at least two first engaging structures along the length direction of the at least two first engaging structures, at least one second limiting groove is arranged on the side walls of the at least one tooth-shaped structure of the at least one second engaging structure along the length direction of the at least one second engaging structure, and when the sliding handle rotates towards the first direction along the circumferential direction of the guide rod, the at least one second limiting block is clamped with the at least one second limiting groove.

10. A delivery system comprising an implant and a delivery device according to any of claims 1-9.