CN113599040A

CN113599040A - Front-end rear-release mechanism of interventional stent conveyor, conveyor and using method

Info

Publication number: CN113599040A
Application number: CN202111091264.9A
Authority: CN
Inventors: 于学保; 许尚栋; 赵国行; 伍源; 付天翔; 刘冰; 崔跃
Original assignee: Beijing Youzhuo Zhenglian Medical Technology Co Ltd
Current assignee: Beijing Youzhuo Zhenglian Medical Technology Co Ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2021-11-05
Anticipated expiration: 2041-09-17
Also published as: CN113599040B

Abstract

A movable claw capable of axially moving on a first limiting piece is arranged on a front end component, and the movable claw is connected with a metal block of the rear end component of a conveyor through a wire drawing, so that the front end and rear end release function of an interventional support is realized. And the rear end component realizes the positioning locking and the axial movement of the release sleeve and the screw rod through a guide locking mechanism arranged on the release sleeve and the screw rod, so that the positioning locking and the axial movement of the moving claw on the first limiting part are realized, the problem that the moving claw unlocks in advance to cause the problem that the intervention support cannot be released can be avoided, and meanwhile, the problem that the intervention support cannot be released because the moving claw cannot be unlocked can be avoided. The guide locking mechanism is designed into a guide post and an L-shaped guide groove arranged on the outer surface of the screw rod, so that the self-locking safety and the quick unlocking of the front-end rear release mechanism are ensured, and the safety, the reliability and the positioning accuracy of the conveyor are further improved.

Description

Front-end rear-release mechanism of interventional stent conveyor, conveyor and using method

Technical Field

The invention relates to the technical field of medical instruments, in particular to a front-end rear-release mechanism of an interventional stent conveyor, a conveyor and a using method.

Background

The aortic dissection is an acute aortic disease with fierce illness, rapid progress and high death rate, and the incidence rate of the aortic dissection accounts for about 5 to 20 percent of the common population. For the pathological changes limited in descending aorta, the clinical intervention operation of the covered stent is the main treatment scheme at present, namely, the covered stent is pressed and held in a conveyor, enters the way through femoral artery incision, and is conveyed to the pathological change part along a guide wire, an outer sheath tube of the conveyor is withdrawn, the stent is automatically expanded and opened, and is attached to the blood vessel wall, the blood flow in an aortic dissection or a tumor cavity is isolated, and the treatment purpose is achieved. The whole operation process is carried out under the conditions that the heart does not stop beating and the blood circulation is normal.

The aorta covered stent system is a medical apparatus designed for aorta intracavity isolation, and consists of two parts, namely a covered stent and a conveyor. The design of the conveyor determines the release mode and the positioning accuracy of the bracket, and has important influence on the operation hand feeling of an operator and the accurate release of the bracket.

And (3) slowly releasing the proximal end of the release bracket at the first 2-3 sections to obtain position adjustment opportunity and accurate positioning. To avoid blood flow impacting the stent to displace, the first segment of the stent near the center, the bare stent portion, is constrained to the front end of the delivery device. The accurate positioning of the stent can be ensured as long as the position of the conveyor is controlled so that the conveyor does not move relative to the blood vessel. When the stent covering film section is completely opened, the far-end mechanism outside the conveyor body can be operated to open the mechanism restraining the bare stent, complete the release of the stent and withdraw the conveyor. The design part of the conveyor, which can realize the restraint of the front end of the bracket and the in-vitro unlocking release, is called a front-end rear release mechanism.

The front-end rear release mechanism is at least of a double-layer structure, and is matched with other structures such as a middle pipe and the like, so that the front-end rear release mechanism is required to be tightly connected and can move relatively smoothly, and when the blood vessel which is excessively bent deforms, the rear release mechanism cannot be opened due to relative blockage among the matched parts is avoided. The front end rear release mechanism is generally made of a rigid material, is not bendable, and is reduced in size as much as possible in the axial direction of the delivery device to avoid difficulty in passing through a bent vessel. The rear release mechanism should also have a stable locking design to prevent premature unlocking during transport.

Disclosure of Invention

The invention provides a front-end rear release mechanism of an interventional stent conveyor, a conveyor and a use method. And the rear end component realizes the positioning locking and the axial movement of the release sleeve and the screw rod through a guide locking mechanism arranged on the release sleeve and the screw rod, so that the positioning locking and the axial movement of the moving claw on the first limiting part are realized, the problem that the moving claw unlocks in advance to cause the problem that the intervention support cannot be released can be avoided, and meanwhile, the problem that the intervention support cannot be released because the moving claw cannot be unlocked can be avoided.

The technical scheme of the invention is as follows:

a front-end and rear-end release mechanism of an interventional stent conveyor comprises

The front end assembly comprises a first limiting piece, a moving claw sleeved on the first limiting piece and a second limiting piece, wherein a claw groove matched with a claw body of the moving claw is formed in the first limiting piece, the near end of the first limiting piece is fixed to the guide head, and the far end of the first limiting piece limits the axial sliding distance of the moving claw within the length range of the first limiting piece through the second limiting piece;

a back end assembly comprising a metal block and a release sleeve, the metal block being axially positioned within a metal block ring groove in the release sleeve and being rotatable only within the metal block ring groove;

a rear release wire drawing, wherein one end of the rear release wire drawing is fixed on the movable claw, and the other end of the rear release wire drawing is fixed on the metal block;

the release sleeve is sleeved on the screw rod, and the guide locking mechanism arranged on the release sleeve and the screw rod is used for realizing the positioning locking and the axial movement of the release sleeve and the screw rod, so that the positioning locking and the axial movement of the moving claw on the first limiting piece are realized.

Preferably, the guide locking mechanism comprises a guide post and an L-shaped guide groove arranged on the outer surface of the screw rod, and the guide post comprises a positioning column and at least two elastic guide claws arranged at one end of the positioning column; the long supporting arm of the L-shaped guide groove is axially arranged along the screw rod and is in clearance fit with the elastic guide claw; the short support arm of the L-shaped guide groove is arranged along the circumferential direction of the screw and is in interference fit with the elastic guide claw; the short support arm extends to be equipped with the guide way fixed orifices, the guide way fixed orifices with the elasticity direction claw is clearance fit.

Preferably, the upper end and the lower end of the metal block are positioning arc surfaces, and the positioning arc surfaces are in clearance fit with the inner cylindrical surface of the metal block annular groove; the metal block comprises a cutting groove extending from top to bottom through the axis of the metal block, and the cutting groove divides the metal block into two half parts connected only at the lower end; and the drawn wire is fixed in a drawn wire hole in the cutting groove.

Preferably, the rear end assembly further comprises a holding sleeve fixed on the outer surface of the screw in a sleeved mode, a locking indicator and an unlocking indicator are arranged on the outer surface of the far end of the holding sleeve, and a position mark used for indicating the rotating position of the release sleeve is arranged on the outer surface of the near end of the corresponding release sleeve; the included angle between the locking indicator and the unlocking indicator is related to the circumferential length of the short support arm.

Preferably, the inner hole of the release sleeve sequentially comprises a first screw hole section, a metal block annular groove, a second screw hole section and a luer taper joint hole section from the near end to the far end; the first screw hole section and the second screw hole section are slidably sleeved on a release sleeve shaft of the screw; the far end of the screw is fixedly connected with the luer cone connector through a luer cone threaded shaft, and the hole section of the luer cone connector is sleeved on the outer side of the luer cone connector in a sliding mode.

Preferably, the rear end assembly further comprises a middle pipe joint fixed in the screw, a middle pipe fixing hole for accommodating and fixing the middle pipe is formed in the middle pipe joint, the core pipe penetrates through a core pipe through hole of the middle pipe, and the middle pipe further comprises a wire drawing through hole arranged in parallel with the core pipe through hole; the axial line position of the metal block is provided with a core tube hole and a wire drawing hole corresponding to the core tube through hole and the wire drawing through hole; and wire drawing fastening screw holes for screwing wire drawing fastening screws are formed in the two half parts of the metal block.

Preferably, the outer side surface of the middle pipe joint is symmetrically provided with limiting columns in a radially extending manner, and the limiting columns are provided with radial through holes; the radial through hole is a threaded hole with the axis vertical to the middle pipe joint, and a set screw is screwed into the radial through hole to lock the middle pipe; and a middle pipe joint limiting hole for fixing the limiting column is further formed in the screw.

Preferably, from the proximal end to the distal end, the first limiting member sequentially comprises a threaded shaft, a front disc transition shaft, a rear disc and a claw shaft, wherein claw grooves matched with the claw bodies are formed in the front disc and the rear disc, and the length of each claw body is equal to the total length of the front disc, the transition shaft and the rear disc; the far end of the claw body extends inwards to form a claw head, a central hole of the claw head is sleeved on the claw shaft, and the total length of the claw body and the claw head is equal to the total length of the rear disc and the claw shaft; a wire drawing fixing hole is formed between the two claw bodies of the claw head; the far end of claw axle extends and is equipped with the lantern ring axle, the surface of claw axle and lantern ring axle is equipped with the wire drawing groove, the second locating part cup joints the lantern ring axle.

Preferably, the length of the long support arm is greater than the total length of the front disk and the transition shaft.

An interventional stent transporter comprising the front end rear release mechanism, further comprising:

the far end of the guide head is fixed on the threaded shaft of the first limiting piece of the front-end rear release mechanism;

the far end of the screw is sequentially provided with the holding sleeve shaft, the releasing sleeve shaft and the luer taper threaded shaft;

the proximal end of the sheath tube is sleeved on the guide head in a sliding manner, and the distal end of the sheath tube is connected to the screw rod in a sliding manner through a sheath tube joint;

one end of the core pipe is fixed on the guide head, and the other end of the core pipe is fixed on the luer cone joint;

the near end of the middle pipe at least extends out of the near end of the screw rod, and the far end of the middle pipe is fixed on the screw rod through a middle pipe joint; the axial line is provided with a core tube through hole for penetrating the core tube, and the outer side of the core tube through hole is provided with a wire drawing through hole for penetrating a wire drawing.

Preferably, the interventional stent delivery device further comprises a handle 400 capable of realizing fast and slow release, wherein the handle 400 comprises a handle shell and a screw sleeve in the handle shell, one end of the handle shell is provided with an axial extension part of the screw sleeve, and a cam ring fast and slow switching mechanism is arranged on the axial extension part; the cam ring fast-slow switching mechanism comprises a cam ring and a telescopic dental plate; the telescopic dental plates extend inwards to form dental bodies along the radial direction of the cam ring; the outer surface of the telescopic dental plate is in contact connection with the concave-convex inner surface of the cam ring; the screw rod sleeve is provided with a screw rod, a tooth body and a screw rod, wherein the tooth body is positioned in a radial through hole of the screw rod sleeve, can extend out of the radial through hole and is meshed and connected with threads on a screw rod arranged in the screw rod sleeve so as to realize sliding type quick movement and rotary type slow movement of the screw rod sleeve along the screw rod; a pair of shallow arc-shaped grooves and a pair of deep arc-shaped grooves are symmetrically distributed in the inner hole of the cam ring along the circumferential center to form the concave-convex inner surface; the tooth body is an inner trapezoidal thread matched with the trapezoidal thread of the screw rod; the difference between the radial groove depths of the shallow arc-shaped groove and the deep arc-shaped groove is not less than the height of the tooth body; the screw sleeve sequentially comprises a first shaft section, a second shaft section, a positioning shoulder and a third shaft section; the outer diameters of the first shaft section, the second shaft section and the positioning shoulder are sequentially increased; the cam ring is in clearance fit with the second shaft section, and axial positioning is realized through the positioning shoulder and a clamping ring fixed on the first shaft section; the handle housing is secured to the third shaft segment.

Preferably, the handle further comprises an arc-shaped clamping sleeve, the arc-shaped clamping sleeve comprises a sheath sleeve positioning hole section, a screw positioning hole section and a button hole section, the inner diameters of the sheath sleeve positioning hole section, the screw positioning hole section and the button hole section are sequentially increased, and two buttons are symmetrically arranged on the button hole section; one end of the button is connected with the cylinder wall of the screw positioning hole section, the other end of the button extends to the edge of the button hole section along the axial direction, and a clamping hook is continuously extended and arranged, and the clamping hook is clamped in the G-shaped groove of the clamping ring; a limiting block extends axially from the side where the guide hole of the cam ring is located, and an arc-shaped limiting groove is formed in the end face of the corresponding positioning shoulder of the screw sleeve; the limiting block slides in the arc-shaped limiting groove along with the rotation of the cam ring, and two limiting positions of the limiting block sliding in the arc-shaped limiting groove are positioned at the groove bottom of the shallow arc-shaped groove and the groove bottom of the deep arc-shaped groove respectively corresponding to the outer surface of the telescopic dental plate; the telescopic tooth plate comprises a tooth plate and a reed, and a reed hole is formed in the center of the tooth plate; the reed is an arched spring piece which is arranged in the reed hole in a penetrating way, the support leg of the reed faces inwards, and the arched top of the reed is abutted against the top of the reed hole; the corresponding screw rod sleeve is provided with a reed groove in a cross shape with the radial through hole; the reed groove is preferably a blind groove, and the support legs of the reed are pressed in the reed groove through the tooth plate and the cam ring; the outer surface of the cam ring is opposite to the shallow arc-shaped groove and is provided with an indication position mark; the corresponding handle shell is provided with a fast sliding moving mark and a slow rotating moving mark; the included angle between the shallow arc-shaped groove and the deep arc-shaped groove is 50 degrees, and the included angle between the two limit positions of the corresponding arc-shaped limiting grooves is 50 degrees; the included angle between the fast sliding moving mark and the slow rotating moving mark is 50 degrees.

Preferably, the handle further comprises a sheath tube joint, and the sheath tube connecting section of the sheath tube joint fixes the sheath tube through the sheath tube locking nut; a guide plate is arranged on the peripheral surface of the sheath pipe joint; the guide plate is a near T-shaped guide plate, and the vertical section of the guide plate penetrates through the sheath pipe joint guide groove on the screw rod and moves in the sheath pipe joint guide groove to drive the sheath pipe to move along the axial direction; the horizontal section of the guide plate is clamped between the screw rod sleeve and the second handle; the sheath pipe joint is axially provided with a middle pipe through hole for accommodating a middle pipe; the tail end of the middle pipe through hole is used for sealing and fixing the middle pipe on the sheath pipe joint through a sealing ring and a sealing threaded sleeve.

The use method of the interventional stent transporter with the front-end and rear-end release mechanism is characterized by comprising the following steps of:

the bracket ring at the proximal end of the interventional bracket is fixed to the transition shaft of the first limit by the movable claws and the claw grooves; the release sleeve is attached to the holding sleeve, the position mark of the release sleeve points to the locking indicator mark of the holding sleeve, the guide claw of the guide post is positioned in the guide groove fixing hole of the screw, and at the moment, the distance between the metal block and the moving claw is just equal to the length of the release wire;

s502, the holding sleeve is held by the left hand, the release sleeve is held by the right hand, the position mark of the release sleeve is rotated to the unlocking indicator mark from the locking indicator mark of the holding sleeve 730, and at the moment, the guide claw of the guide column is rotated to the near end of the long support arm from the guide groove fixing hole through the short support arm;

s503, withdrawing the release sleeve, wherein the guide claw of the guide post slides from the proximal end to the distal end of the long support arm, and simultaneously drives the metal block, the wire drawing and the moving claw to be withdrawn until the claw head of the moving claw moves to the proximal end of the second limiting part and is limited; because the total length of the claw body and the claw head is equal to the total length of the rear disc and the claw shaft, the claw body is completely separated from the transition shaft at the moment, and then the support ring clamped on the transition shaft is released, and the front end rear release process of the interventional support is completed.

A method of using an interventional stent transporter with the front end rear release mechanism and handle, comprising the steps of:

s1, in an initial state, the bracket ring inserted into the near end of the bracket is fixed to the transition shaft of the first limiting piece by the moving claw and the claw groove, and is integrally folded and arranged in the sheath tube, the near end of the sheath tube is sleeved on the guide head, and the moving claw is completely clamped in the claw groove;

a hook of the arc-shaped clamping sleeve is hooked and locked with a G-shaped groove of the clamping ring, a triangular position mark on the cam ring points to a slow-speed rotating moving mark S on the handle shell, a limiting block on the cam ring is positioned at the left end of an arc-shaped limiting groove of the screw sleeve, the top arcs of two tooth plates are positioned in a shallow arc-shaped groove of the cam ring, the tooth plates are pressed down by the shallow arc-shaped groove and move down along a radial through hole on the screw sleeve, the reed supported in the reed groove is pressed down and flattened by the tooth plates, and the tooth bodies are meshed with trapezoidal threads on the screw;

the release sleeve is attached to the holding sleeve, the position mark of the release sleeve points to the locking indicator mark of the holding sleeve, the guide claw of the guide post is positioned in the guide groove fixing hole of the screw, and at the moment, the distance between the metal block and the moving claw is just equal to the length of the rear release wire;

s2, conveying the interventional stent to a designated position;

s3, in the slow release process, when two buttons on the arc-shaped clamping sleeve are pressed down, the two clamping hooks are separated from the clamping ring for unlocking, the handle shell is rotated, the tooth plate can make spiral motion in the trapezoidal thread of the screw rod, and the tooth plate can drive the screw rod sleeve, the handle shell, the sheath tube joint and the sheath tube to slowly move along the axial direction of the screw rod, so that the slow release of the intervention support is realized and completed;

s4, in the quick release process, the cam ring is stirred, so that the cam ring rotates to a triangular index and points to a quick movement index F; at the moment, a limiting block of the cam ring is positioned at the right end of an arc-shaped limiting groove of the screw rod sleeve, the two tooth plates rotate to the deep arc-shaped groove of the cam ring, and the two pressed reeds jack the two tooth plates until the top arcs of the tooth plates are tangent to the arc tops of the deep arc-shaped groove; at the moment, the tooth plate is disengaged from the screw rod, the handle shell is quickly withdrawn along the screw rod, and the screw rod sleeve, the sheath tube joint and the sheath tube can be driven to quickly move along the axial direction of the screw rod, so that the quick release of the intervention support is realized and completed;

s5, a front end rear release process, after the interventional stent is rapidly released, only the stent ring at the near end of the interventional stent is fixed to the transition shaft of the first limiting piece by the movable claw and the claw groove; the release sleeve is rotated to enable the position mark of the release sleeve to rotate from the locking indicator mark to the unlocking indicator mark of the holding sleeve, and meanwhile, the guide claw of the guide column rotates from the guide groove fixing hole to the near end of the long support arm through the short support arm; because the metal block and the metal block ring groove of the release sleeve are in clearance fit, the metal block cannot drive the wire drawing to rotate; then, withdrawing the release sleeve, wherein the guide claw of the guide post slides from the proximal end to the distal end of the long support arm, and simultaneously drives the metal block, the wire drawing and the moving claw to withdraw until the claw head of the moving claw moves to the proximal end of the second limiting part and is limited; the total length of the claw body and the claw head is equal to the total length of the rear disc and the claw shaft, so that the claw body is completely separated from the transition shaft, the support ring clamped on the transition shaft is released, and the front-end rear release process of the interventional support is completed;

s6, in the guide head locking stage, determining that the cam ring is in a quick release position, withdrawing the arc-shaped clamping sleeve, and enabling the clamping hook to be extruded by the clamping ring to bend downwards when the inclined surface of the clamping hook is contacted with the clamping ring until the clamping hook slides into the G-shaped groove of the clamping ring and is hooked and locked with the clamping ring again, and at the moment, the far end of the guide head returns to the sheath tube and is locked;

s7, the conveyor is wholly withdrawn.

Compared with the prior art, the invention has the advantages that:

1. the invention relates to a front-end rear release mechanism of an intervention support conveyor, a conveyor and a using method. And the rear end component realizes the positioning locking and the axial movement of the release sleeve and the screw rod through a guide locking mechanism arranged on the release sleeve and the screw rod, so that the positioning locking and the axial movement of the moving claw on the first limiting part are realized, the problem that the moving claw unlocks in advance to cause the problem that the intervention support cannot be released can be avoided, and meanwhile, the problem that the intervention support cannot be released because the moving claw cannot be unlocked can be avoided.

2. According to the front-end rear release mechanism of the interventional stent conveyor, the conveyor and the use method, the guide locking mechanism is designed into the guide post and the L-shaped guide groove arranged on the outer surface of the screw rod, so that the front-end rear release mechanism is ensured to be self-locked safely and unlocked quickly.

3. According to the front-end rear-release mechanism of the interventional stent conveyor, the conveyor and the use method, the front end assembly is opened in a wire drawing design, so that the volume of a core pipe part is reduced, the loading space of the stent is increased, and the diameter of a sheath pipe of the conveyor is reduced.

4. According to the front-end rear-release mechanism of the interventional stent conveyor, the conveyor and the using method, the handle is provided with the screw sleeve and the cam ring speed switching mechanism arranged on the axial extension part of the screw sleeve, the cam ring speed switching mechanism comprises the cam ring and the telescopic tooth plate, the slow and fast release of the stent is realized, the switching mode does not distinguish the circumferential direction of the handle, the operation is convenient, and more attention of a clinical operator is focused on an observation screen for releasing the stent.

5. The invention relates to a front-end rear-release mechanism of an interventional stent conveyor, a conveyor and a using method, wherein a triangular position mark on a cam ring points to S of a handle shell, a limit block on the cam ring is positioned at the left end of an arc-shaped limit groove, the top arcs of two tooth plates are positioned in a shallow arc-shaped groove and are pressed down by the shallow arc-shaped groove, so that the tooth bodies are meshed with trapezoidal threads on a screw rod, the handle shell is rotated, the tooth plates perform spiral motion in the trapezoidal threads of the screw rod, and further a screw rod sleeve, a sheath tube joint and a sheath tube are pushed to slowly move along the axial direction of the screw rod, and the slow release of an interventional stent is realized. After the cam ring is released in place, the cam ring is rotated by a certain angle by simply stirring the cam ring, when the triangle position mark points to the quick movement mark F, the limiting block is positioned at the right end of the arc-shaped limiting groove, the two tooth plates rotate to the deep arc-shaped groove position, and the two pressed reed jacks up the two tooth plates to be tangent to the arc top of the deep arc-shaped groove; the dental lamina breaks away from the interlock with the screw rod, along the quick back-off handle casing of screw rod, drives screw rod cover, sheath pipe joint and sheath pipe along screw rod axial quick travel to the realization intervenes the quick release of support. And no matter which kind of release state is in, the reed can be with the dental lamina top to dark arc groove position or shallow arc groove position all the time, so the dental lamina can not automatic compression reed from an arc section entering another arc section, removes artificial stirring cam ring, and the handle can not automatic switch over between fast slow release state for the whole safe and reliable that uses of handle.

6. The invention relates to a front-end rear release mechanism of an interventional stent conveyor, a conveyor and a use method, wherein after an interventional stent is sent to a designated position, a clamping hook and a clamping ring are separated and unlocked by pressing two buttons on an arc-shaped clamping sleeve, and further a sheath tube and a guide head can be separated. After the interventional stent is released, the arc-shaped clamping sleeve is withdrawn, so that the clamping hook clamping ring is hooked and locked again. At the moment, the withdrawing conveying system can not lead the guiding head and the withdrawing releasing mechanism to be separated from the sheath tube no matter which part of the handle is held by hands and the handle is withdrawn by straight pulling or rotating, so that the vascular intima is prevented from being scratched by the withdrawing releasing mechanism, and the size mutation and the operation difficulty when the sheath tube, the withdrawing releasing mechanism and the guiding head are withdrawn from the femoral artery incision in sequence are avoided.

Drawings

FIG. 1(a) is a schematic three-dimensional view of the front end assembly of the front-end rear release mechanism of the interventional stent transporter of the present invention in a fully released state of the interventional stent, wherein the movable jaw is moved to be completely disengaged from the transition axis, i.e., in the fully released state of the interventional stent;

FIG. 1(b) is a schematic cross-sectional view of FIG. 1(a) after half-cutting in the axial direction;

FIG. 2(a) is a schematic three-dimensional structure of the front end assembly of the front-end rear release mechanism of the interventional stent transporter of the invention in an initial state;

FIG. 2(b) is a schematic cross-sectional view of FIG. 2(a) after half-cutting in the axial direction;

FIG. 3 is a schematic three-dimensional view of a first stopper of a front-end and rear-end release mechanism of an interventional stent conveyor according to the present invention;

FIG. 4 is a schematic diagram of the three-dimensional structure of the moving claw of the front-end and rear-end releasing mechanism of the interventional stent conveyor of the invention;

FIG. 5 is a schematic diagram of the rear end assembly of the front and rear release mechanisms of the interventional stent transporter of the present invention;

FIG. 6 is a schematic front view of a guide post of the interventional stent conveyor according to the present invention;

FIG. 7 is a schematic view of the screw of the conveyor of the interventional stent of the present invention;

FIG. 8 is a schematic view of the structure of the present invention for matching the guide post and the L-shaped guide groove of the interventional stent conveyor;

FIG. 9 is a schematic view of the structure of a metal block of the interventional stent transporter of the present invention;

FIG. 10 is a schematic view of a handle sheath of the interventional stent delivery device of the present invention;

FIG. 11 is a schematic view of the release sleeve of the interventional stent transporter of the present invention;

FIG. 12 is a schematic three-dimensional structure of a pipe joint in an interventional stent transporter and a schematic front cross-sectional structure of a middle pipe according to the present invention;

FIG. 13 is a schematic view of the handle structure of the present invention;

FIG. 14 is a schematic view of the handle cam ring of the present invention;

FIG. 15 is a schematic three-dimensional view of the handle screw housing of the present invention;

FIG. 16 is a schematic view of the structure of the handle extension dental plate of the present invention;

FIG. 17 is a schematic structural view of the handle arc-shaped ferrule of the present invention

FIG. 18 is a schematic view of the structure of the handle arcuate snap ring of the present invention;

FIG. 19 is a schematic cross-sectional view of 3 mating structures of the handle arc ferrule and snap ring of the present invention;

FIG. 20 is a schematic view of the construction of the sheath adaptor of the handle of the present invention;

FIG. 21 is a schematic three-dimensional view of an embodiment of an interventional stent transporter of the present invention;

fig. 22 is a schematic view showing the three states of the interventional stent transporter in use according to the present invention in cooperation with an interventional stent.

The reference numbers in the figures are:

100-a guide head, 2-an interventional stent,

200-front end assembly, 210-first stop, 211-threaded shaft, 212-front disk, (2121, 2141) -jaw groove, 213-transition shaft, 214-rear disk, 215-jaw shaft, 216-collar shaft, 217-wire drawing groove, 218-inner hole, 220-moving jaw, 221-jaw body, 222-jaw head, 223-center hole, 224-wire drawing fixing hole, 230-second stop,

300-a sheath tube, wherein the sheath tube is a hollow tube,

400-handle, 410-handle housing, 420-screw housing, 421-first shaft section, 422-second shaft section, 423-positioning shoulder, 424-third shaft section, 4221-radial through hole, 4222-reed groove, 4231-arc limiting groove, 430-cam ring fast-slow switching mechanism, 431-cam ring, 431A-guide section, 431B-cam section, 4311-shallow arc groove, 4312-deep arc groove, 4313-triangle index, 432-telescopic dental plate, 4322-dental plate, 43221-reed hole, 4323-reed, 4321-dental body, 433-limiting block, 440-sheath tube moving device, 441-sheath tube joint, 4411-sheath tube connecting section, 4412-transition section, 4413-guide plate, 4414-sealing hole, 442-sheath tube locking nut, 450-snap ring, 451-G type groove, 452-locating hole, 460-arc cutting sleeve, 461-sheath pipe sleeve locating hole section, 462-screw rod locating hole section, 463-button hole section, 464-button, 465-clamping hook, 470-sheath pipe sleeve, 480-sealing ring, 490-sealing screw sleeve,

500-screw, 510-first location axis, 511-sheath tube sleeve location axis, 520-button shoulder, 521-button groove, 530-trapezoidal thread axis, 531-sheath tube joint guide groove, 540-holding sleeve axis, 541-middle tube joint limit hole, 542-extension tube seat hole, 550-release sleeve axis, 551-L type guide groove, 5511-long support arm, 5512-short support arm, 5513-guide groove fixing hole, 552-metal block guide groove, 560-luer taper thread axis,

after the temperature is 600-the wire drawing is released,

700-rear end component, 710-middle pipe joint, 711-middle pipe fixing hole, 712-radial through hole, 713-spacing column, 714-extension pipe seat, 720-set screw, 730-holding sleeve, 731-locking indicator, 732-unlocking indicator, 733-U-shaped groove, 740-metal block, 741-core pipe hole, 742-wire drawing hole, 743-wire drawing fastening screw hole, 744-cutting groove, 750-wire drawing fastening screw, 760-releasing sleeve, 761-first screw hole section, 762-metal block annular groove, 763-second screw hole section, 764-luer taper joint hole section, 765-position mark, 767-guide column hole,

780-guide column, 781-positioning column, 782-guide claw, 790-luer taper joint,

800-core tube, 900-middle tube, 901-core tube through hole and 902-wire drawing through hole.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to specific examples and comparative examples.

The proximal end of the present invention refers to the end near the tip of the guide tip 100, the distal end refers to the end away from the tip of the guide tip 100, the inner refers to the side near the axis, and the outer refers to the side away from the axis.

Example 1

A front-end rear-release mechanism of an interventional stent transporter, as shown in fig. 1-2, includes a front-end assembly 200, which includes a first limiting member 210, a moving claw 220 sleeved on the first limiting member 210, and a second limiting member 230, wherein the first limiting member 210 is provided with a claw groove (2121, 2141) matched with a claw body 221 of the moving claw 220, a proximal end of an interventional stent is fixed to the first limiting member 210 through the cooperation of the moving claw 220 and the claw groove (2031, 2041), a proximal end of the first limiting member 210 is fixed to the guide head 100, a distal end of the first limiting member 210 limits an axial sliding of the moving claw 220 within a length range of the first limiting member 210 through the second limiting member 230, and the proximal end of the interventional stent can be released when the moving claw 220 moves.

As shown in fig. 3, from the proximal end to the distal end, the first limiting member 210 sequentially includes a threaded shaft 211, a front disc 212, a transition shaft 213, a rear disc 214, and a claw shaft 215, claw grooves (2031, 2041) matching with the claw body 221 are respectively disposed on the front disc 212 and the rear disc 214, and an inner hole 218 through which the core tube 800 passes is disposed at an axial center position of the first limiting member 210. A plurality of stent rings inserted into the proximal end of the stent are arranged on the claw bodies 221 and then fixed at the transition shaft 213, and the length L1 of the claw bodies 221 is equal to the total length of the front disc 212, the transition shaft 213 and the rear disc 214; as shown in fig. 4, a claw head 222 extends inward from the distal end of the claw body 221, a central hole 223 of the claw head 222 is sleeved on the claw shaft 215, and the total length L2 of the claw body 221 and the claw head 222 is equal to the total length of the rear disc 214 and the claw shaft 215; a wire drawing fixing hole 224 is formed between the two claw bodies 221 of the claw head 222, the wire drawing 600 is fixed in the wire drawing fixing hole 224 in a welding mode, specifically, the diameter of the wire drawing 600 is the same as that of the wire drawing fixing hole 224 of the claw head 222, and is preferably 0.2-0.4 mm; as shown in fig. 1(b), the wire drawing proximal end is provided with a straight hook bent into a 90-degree angle with a length of 1-2 mm, and the straight hook is inserted into the wire drawing fixing hole 224 and welded and fixed with the claw head 222; a collar shaft 216 extends from a distal end of the claw shaft 215, a wire drawing groove 217 is formed on outer surfaces of the claw shaft 215 and the collar shaft 216, and the second stopper 230 is sleeved on the collar shaft 216. The drawn wire 600 adjacent to the straight hook is embedded into the wire drawing groove 217 of the first limiting part 210, the drawn wire 600 is in clearance fit with the wire drawing groove 217, and the drawn wire 600 freely slides in the wire drawing groove 217. The pull wire 600 is fixed in the pull hole 742 (see the main sectional structural view of the middle tube in fig. 12 (b)) of the metal block 740 at the distal end after passing through the pull through hole 902 (see the main sectional structural view of the middle tube in fig. 12 (b)) in the middle tube 900. The second retaining member 230 is preferably a collar fixedly attached to the collar shaft 216, the collar is preferably a tapered metal ring having a thickness equal to the length of the collar shaft 216, and the collar 230 and the collar shaft 216 are welded together. The lantern ring 230 limits the wire drawing 600 in the wire drawing groove 217, so that the wire drawing 600 can be smoothly drawn and sent under the guidance of the wire drawing groove 217.

The front end assembly 200 designed above is completely a rigid metal structure, and will not deform in a bent blood vessel and change the matching performance between parts, and at any time the distal end of the pull wire 600 is pulled, the pull wire 600 will drive the moving claw 220 to easily move on the claw shaft of the first limiting member 210. Ensures that the front end component 200 can be smoothly opened in an abnormally bent blood vessel, so that the naked end (the proximal end) of the interventional stent can be smoothly released and opened.

Meanwhile, the front end assembly 200 only needs to be assembled with a single-layer core tube 800, so that the section size of the core tube 800 can be reduced, the loading space of the support in the sheath tube 300 can be increased, the supports with the same specification can be assembled, the outer diameter of the sheath tube 300 can be reduced, and the size of a conveying system is smaller. The front end module 200 is preferably made of PEEK or 304L stainless steel or 316L stainless steel.

The nose rear release mechanism further includes a rear end assembly 700, the rear end assembly 700 including a slug 740 and a release sleeve 760, the slug 740 being axially positioned within a slug ring groove 762 in the release sleeve 760 and being rotatable only within the slug ring groove 762; the release sleeve 760 is sleeved on the screw 500, and the positioning, locking and axial movement of the release sleeve 760 and the screw 500 are realized through a guide locking mechanism arranged on the release sleeve 760 and the screw 500. The movable claw 220 and the metal block 740 are connected through the wire 600, and further, the movable claw 220 can be positioned, locked and axially moved on the first stopper 210 by moving the positioning, locking and axially moving of the release sleeve 760 located at the rear end. Fig. 5(a) is a schematic three-dimensional structure of the rear end module in a locked state, fig. 5(b) is a schematic structural view of the screw rod, the release sleeve and the grip sleeve in a half-section when the rear end module is in the locked state, fig. 5(c) is a schematic structural view in a half-section when the rear end module is in the locked state, and fig. 5(d) is a schematic structural view in a half-section when the rear end module is in an unlocked state.

Preferably, the guiding locking mechanism includes a guiding post 780 and an L-shaped guiding groove 551 disposed on the outer surface of the screw 500, and the guiding post 780 includes a positioning post 781 and at least two elastic guiding pawls 782 disposed at one end of the positioning post 781 as shown in fig. 6; preferably, as shown in fig. 6(a), the lower ends of the two elastic guide claws 782 are opened in a free state, and the total width is D1. As shown in fig. 6(b), after being pressed in the operation, the lower ends of the two guide claws are closed, and the total width is D2, D1> D2. The guide post 780 is installed in the guide post hole 767 of fig. 7 perpendicular to the cylindrical surface of the release sleeve 760, and two elastic guide claws 782 of the guide post 780 are inserted into the L-shaped guide grooves 551 of the release sleeve shaft 550 of the screw 500. The opening direction of the elastic guide jaw 782 is parallel to the axial direction of the release case 760.

As shown in fig. 7, wherein fig. 7(a) is a schematic front view of the screw rod; FIG. 7(b) is a schematic cross-sectional view C-C of the screw; fig. 7(c) is a schematic structural view showing the L-shaped guide groove exposed after the screw is rotated counterclockwise (as viewed from the distal end), and fig. 7(d) is a schematic structural view of a cross section a-a of the screw. The short arm 5512 of the L-shaped guide groove 551 is extended with a guide groove fixing hole 5513. Specifically, referring to the schematic diagram of the matching structure of the guide post and the long supporting arm 5511 of the L-shaped guide groove in fig. 8(a), the long supporting arm 5511 of the L-shaped guide groove 551 is an elastic guide pawl releasing section, is disposed along the axial direction of the screw 500, and is in clearance fit with the elastic guide pawl 782, so that the elastic guide pawl 782 is in a free state at this point, and the release sleeve 760 can easily move along the axial direction along with the guide post 780.

The short supporting arm 5512 of the L-shaped guide groove 551 is an elastic guide claw locking section, and is arranged along the circumferential direction of the screw 500 and in interference fit with the elastic guide claw 782, so that the elastic guide claw 782 is in a pressed state at this position; referring specifically to the schematic diagram of the structure of the guide post and the short arm 5512 in fig. 8(b), the total width of the flexible guiding pawl 782 is reduced from D1 to D2, and then the releasing sleeve 760 is rotated counterclockwise (from the far end to the near end) by a force, so that the flexible guiding pawl 782 can pass through the short arm 5512 to reach the guiding slot fixing hole 5513.

The guide slot fixing hole 5513 is preferably in clearance fit with the elastic guide claw 782; referring to the schematic diagram of the structure of the guide post and the guide slot fixing hole 5513 in fig. 8(c), when the elastic guide claws 782 are located in the guide slot fixing hole 5513, the two elastic guide claws 782 elastically expand to a width D1 by themselves, so that 780 is fixed in the guide slot fixing hole 5513 and does not automatically enter the long support arm 5511 through the short support arm 5512. This allows for secure and easy operation of the locking of the release sleeve 760 so that the front end rear release mechanism does not open undesirably automatically.

Preferably, the slot of the L-shaped guide slot 551 has a trapezoidal shape, and the width of the slot bottom of the resilient guide pawl releasing section is equal to the aperture of the guide slot fixing hole 5513 and is greater than the width of the slot bottom of the resilient guide pawl locking section. The length of the long support arm 5511 is preferably greater than the total length of the front plate 212 and the transition shaft 213.

Preferably, the upper end and the lower end of the metal block 740 are positioning arc surfaces, specifically, as shown in a front view of the metal block 740 in fig. 9(a) and as shown in an end view of the proximal end of the metal block 740 in fig. 9(b), the positioning arc surfaces are in clearance fit with the inner cylindrical surface of the metal block annular groove 762; allowing the slug 740 to freely rotate within the slug pocket 762. The slug 740 includes a cut-out 744 extending from top to bottom across its axis (the cut-out 744 being perpendicular to the end face of the release sleeve 760), the cut-out 744 dividing the slug 740 into two halves joined only at the lower end; the drawing wire 600 is fixed in a drawing hole 742 in the cutting groove 744, and the drawing hole 742 is in close fit with the drawing wire 600. The metal block 740 is preferably formed of stainless steel such as SUS304, SUS304L, SUS316 or SUS 316L.

Preferably, the rear end module 700 further includes a holding sleeve 730 sleeved and fixed on the outer surface of the screw 500, and the holding sleeve 730 is preferably a cylindrical collar as shown in fig. 10. The distal end of the outer surface of the holding sleeve 730 is provided with a locking indicator 731 and an unlocking indicator 732, and the proximal end of the outer surface of the corresponding release sleeve 760 is provided with a position mark 765 for indicating the rotating position of the release sleeve; the angle between the locking and unlocking

indicators

731 and 732 is related to the circumferential length of the short leg 5512 of the L-shaped guide groove 551, and is preferably acute, and more preferably 40 °. The grip sleeve 730 is preferably made of ABS, PE, PVC, or the like. The extension tube holder 714 of the middle tube connector 710 of the exposed screw 500 is inserted into the U-shaped groove 733 of the holding sleeve 730 and positioned.

Preferably, fig. 11(a) is a schematic three-dimensional structure of the release liner 760, and fig. 11(b) is a schematic front cross-sectional structure of the release liner 760, wherein the release liner 760 is a cylindrical sleeve whose inner bore includes a first screw hole section 761, a metal block ring groove 762, a second screw hole section 763, and a luer taper joint hole section 764 in sequence from the proximal end to the distal end; the first and second screw hole sections 761, 763 are clearance-fit sleeved on the release sleeve shaft 550 of the screw 500 such that the release sleeve 760 can slide on the release sleeve shaft 550 of the screw 500. The inside diameter of the metal block annular groove 762 is larger than the inside diameters of the first screw hole section 761 and the second screw hole section 763, which can be used for limiting the metal block 740, so that the metal block 740 can only rotate relatively in the metal block annular groove 762 and cannot move axially relative to the release sleeve 760.

The distal end of the screw 500 is fixedly connected with a luer taper joint 790 through a luer taper threaded shaft 560, and the luer taper joint hole segment 764 is sleeved outside the luer taper joint 790 in a clearance fit manner and used for accommodating the luer taper joint 790. The distal end of the core tube 800 is fixed to the luer taper fitting 790 and the proximal end is fixed to the guide tip 100. The release wrap 760 is preferably made of plastic such as ABS, PE, PVC, etc.

Preferably, the rear end assembly 700 further includes a middle tube joint 710 fixed in the screw 500, as shown in fig. 12(a), a middle tube fixing hole 711 for receiving and fixing the middle tube 900 is provided in the middle tube joint 710, the core tube 800 is inserted into the core tube through hole 901 of the middle tube 900, and the middle tube 900 further includes a wire drawing through hole 902 parallel to the core tube through hole 901. Referring to fig. 9, a core tube hole 741 and a wire drawing hole 742 are disposed at axial positions of the metal block 740 corresponding to the core tube through hole 901 and the wire drawing through hole 902; the two halves of the metal block 740 are provided with wire drawing fastening screw holes 743 for screwing wire drawing fastening screws 750, the wire drawing fastening screw holes 743 are perpendicular to the cutting groove 744, the wire drawing fastening screw holes 743 on one half of the metal block 740 are counter bores, the wire drawing fastening screw holes 743 on the other half of the metal block 740 are threaded holes, and then the wire drawing holes 742 clamp the wire drawing 600 by screwing the wire drawing fastening screws 750.

The outer side surface of the middle pipe joint 710 is symmetrically provided with limiting columns 713 in a radially extending manner, and the limiting columns 713 are provided with radial through holes 712; the radial through hole 712 is a threaded hole with an axis perpendicular to the middle pipe joint 710, and a set screw 720 is screwed into the radial through hole 712 to lock the middle pipe 900; a middle pipe joint limiting hole 541 for fixing the limiting column 713 is further formed in the screw 500. The middle pipe joint 710, the middle pipe 900 and the screw 500 are fixed together by fixing the limiting columns 713 into the middle pipe joint limiting holes 541.

Example 2

A handle capable of realizing rapid and slow release of an interventional stent is shown in fig. 13 and comprises a handle shell 410 and a screw sleeve 420 fixed in the handle shell 410, wherein one end (the proximal end in fig. 13) of the handle shell 410 is provided with an axial extension part of the screw sleeve 420, and a cam ring rapid and slow switching mechanism 430 is arranged on the axial extension part. Wherein FIG. 13(a) is a schematic view of the handle structure of the present invention; FIG. 13(b) is a schematic cross-sectional view of the handle of the present invention in a rotationally slow moving state; FIG. 13(c) is a schematic cross-sectional view of the handle of the present invention in a state of gliding quick movement;

cam ring speed switching mechanism 430 includes a cam ring 431 and a telescoping dental plate 432. Cam ring 431 is received in clearance fit with screw housing 420. In the radial direction of the cam ring 431, the telescopic dental plate 432 has a dental body 4321 extending inward. The teeth 4321 are preferably internal trapezoidal threads that mate with the trapezoidal threads of the screw.

The outer surface of the telescopic dental plate 432 is in contact connection with the concave-convex inner surface of the cam ring 431; the teeth 4321 are located in the radial through hole 4221 of the screw housing 420 and can protrude from the radial through hole 4221 to be engaged with threads on the screw 500 provided in the screw housing 420 to achieve sliding-type fast movement and rotary-type slow movement of the screw housing 420 along the screw 500.

The screw rod 500 of the conveyer is provided with the sheath tube 300 therein, the screw rod 500 is provided with a sheath tube joint guide groove 531, and the guide plate 4413 of the sheath tube moving device 440 fixedly connected with the distal end of the sheath tube 300 passes through the sheath tube joint guide groove 531 to connect the sheath tube 300 to the handle housing 410 and the screw sleeve 420. The guide plate 4413 is in clearance fit with the sheath joint guide groove 531.

The cam ring speed switching mechanism 430 is engaged with the screw 500 of the conveyor so that the concave-convex inner surface of the cam ring 431 presses the teeth 4321 down to protrude from the radial through hole 4221 and is engaged with the thread on the screw 500. By rotating the handle housing 410, the screw sleeve 420 rotates to drive the sheath moving device 440 connected with the screw sleeve to move slowly towards the far end along the screw 500, and further drive the sheath 300 to move slowly towards the far end along the screw 500 together, so as to realize slow release of the interventional stent.

After the slow release process of the interventional stent is completed, the cam ring 431 is rotated by a small amplitude (for example, 50 °), so that the concave-convex inner surface of the cam ring 431 rebounds the teeth 4321 into the radial through hole 4221 and separates from the threads on the screw 500, and the handle housing 410, the screw sleeve 420, the sheath catheter moving device 440 and the sheath catheter 300 are directly and rapidly pulled to the far end to perform sliding type rapid movement to the far end along the sheath catheter joint guide groove 531 of the screw 500 together.

Since the concave-convex inner surface of the cam ring 431 has a limiting effect on the outer surface of the telescopic dental plate 432, in design, as shown in fig. 14(a), which is a schematic end surface structure of an embodiment of the cam ring, a smooth transition surface can be designed between two limiting positions of the concave-convex inner surface of the cam ring 431, and the smooth transition surface enables an operator to apply a certain torque to rotate the cam ring 431. Both sides of the two limits of the concave-convex inner surface of the cam ring 431 are designed as vertical groove surfaces, so that the operator cannot rotate the cam ring 431 out of the range no matter how much torque is applied. Therefore, when the operator operates, the operator does not need to visually confirm the position of the handle, and can realize fast and slow switching by directly trying to rotate, so that the observation of the operator on the image screen is not interfered.

Preferably, the cam ring speed switching mechanism 430 includes two pairs of telescopic tooth plates 432 symmetrically disposed on both sides of the screw. The corresponding radial through holes 4221 of the screw sleeve 420 are also symmetrically designed in two, so that the rotary slow movement is smoother and more stable.

Unlike the above embodiments, there is shown in fig. 14(b-d) a schematic structural view of another embodiment of the cam ring, in which fig. 14(b) is a schematic structural view of an end face of the cam ring; FIG. 14(c) is a schematic three-dimensional view of the cam ring; FIG. 14(d) is a schematic cross-sectional view of the cam ring; the inner hole of the cam ring 431 is symmetrically distributed with a pair of shallow arc-shaped grooves 4311 and a pair of deep arc-shaped grooves 4312 along the circumferential center to form the concave-convex inner surface. The radial groove depth of the shallow arc-shaped groove 4311 is R1, the radial groove depth of the deep arc-shaped groove 4312 is R2, and the difference between the radial groove depths of the shallow arc-shaped groove 4311 and the deep arc-shaped groove 4312 is not less than the height of the tooth body 4321, namely R2-R1 are not less than the height of the tooth body 4321. Preferably, R2-R1 is the height of the denticle 4321.

Preferably, the shallow arc 4311 and the deep arc 4312 extend axially and are angled at 50 °, i.e., the cam ring 431 is rotatable at 50 °.

Preferably, the cam ring 431 is a cylindrical ring, and a plurality of protrusions are uniformly distributed on the outer cylindrical surface of the cylindrical ring, so that the cam ring 431 can be conveniently pushed by a thumb to rotate; and a triangular position mark 4313 is arranged on the outer cylindrical surface corresponding to the shallow arc-shaped groove 4311 and used for indicating the position of the cam ring 431 after rotation, and a fast moving mark F and a slow rotating mark S are correspondingly arranged on the handle shell 410. The angle between the fast moving flag F and the slow rotating moving flag S is also 50 °.

The inner cylindrical surface of the cam ring 431 is divided into a guide section 431A and a cam section 431B, the guide section is a complete inner cylindrical surface and is in clearance fit with the cam column on the screw sleeve 420; the shallow arc-shaped groove 4311 and the deep arc-shaped groove 4312 are centrally and symmetrically distributed on the cam section, and the smooth transition surface between the shallow arc-shaped groove 4311 and the deep arc-shaped groove 4312 is directly a cylindrical surface with the same diameter as the guide section.

Preferably, a limit block 433 extends in the axial direction on the side of the guide hole of the cam ring 431 for further limiting the range of positions in which the cam ring 431 rotates; an arc-shaped limit groove 4231 is arranged on the end surface of the positioning shoulder 423 of the corresponding screw sleeve 420; the limiting block 433 slides in the arc-shaped limiting groove 4231 along with the rotation of the cam ring 431, and two limiting positions (4321A and 4321B) of the limiting block 433 sliding in the arc-shaped limiting groove 4231 are respectively positioned at the groove bottom of the shallow arc-shaped groove 4311 and the groove bottom of the deep arc-shaped groove 4312 corresponding to the outer surface of the telescopic dental plate 432. That is, the angle between the two extreme positions of the arc-shaped stopper groove 4231 is 50 °.

Preferably, as shown in fig. 15, the screw housing 420 includes, in order, a first shaft section 421, a second shaft section 422, a positioning shoulder 423, and a third shaft section 424; the outer diameters of the first shaft segment 421, the second shaft segment 422 and the positioning shoulder 423 are raised in sequence; the cam ring 431 is in clearance fit with the second shaft section 422, and the cam ring 431 is arranged between the positioning shoulder 423 and the snap ring 450 and realizes axial positioning through the positioning shoulder 423 and the snap ring 450; the snap ring 450 is secured to the first shaft segment 421 and the handle housing 410 is secured to the third shaft segment 424.

Preferably, the telescopic dental plate 432 comprises a dental plate 4322 and a spring 4323, as shown in fig. 16(a), which is a three-dimensional structural diagram of the dental plate; a reed hole 43221 is arranged at the center of the dental plate 4322; fig. 16(b) is a schematic three-dimensional structure diagram of the spring plate 4323, fig. 16(c) is a schematic three-dimensional structure diagram of the telescopic dental plate 432, the spring plate 4323 is an arcuate spring plate inserted into the spring plate hole 43221, the support leg 4323A of the spring plate 4323 faces inward, and the arcuate vertex of the spring plate 4323 abuts against the top of the spring plate hole 43221; the corresponding screw sleeve 420 is provided with a reed groove 4222 crossed with the radial through hole 4221; the spring groove 4222 is preferably a blind groove, and the leg 43231 of the spring 4323 is pressed into the spring groove 4222 by the tooth plate 4322 and the cam ring 431. The outer surface of the telescopic dental plate 432 is an arc top surface 4322A of the dental plate 4322, and the radian of the arc top surface is smaller than that of the deep arc groove 4312.

Preferably, the material of the tooth plate 4322 and the cam ring 431 comprises PEEK material and/or POM material with good self-lubricating property, and the material of the reed 4323 comprises 0Cr17Ni7Al stainless steel or TINI memory alloy with good elasticity. The rest parts of the handle are made of plastic materials such as ABS, PE, PVC and the like.

Preferably, the handle for realizing the fast and slow release of the interventional stent further comprises an arc-shaped cutting sleeve 460, specifically see fig. 17, wherein fig. 17(a) is a schematic three-dimensional structure diagram of the arc-shaped cutting sleeve; fig. 17(b) is a schematic sectional structure and a partially enlarged structure of the arc-shaped ferrule; the arc-shaped ferrule 460 is an arc-shaped sleeve with a small proximal end and a large distal end. The arc-shaped cutting sleeve 460 comprises a sheath sleeve positioning hole section 461, a screw rod positioning hole section 462 and a button hole section 463 with sequentially increased inner diameters, and two buttons 464 are symmetrically arranged on the button hole section 463; one end of the button 464 is connected with the cylinder wall of the screw positioning hole section 462, and the other end extends to the edge of the button hole section 463 along the axial direction, and is continuously extended with a hook 465, and the hook 465 is clamped in the G-shaped groove 451 of the clamp ring 450. The height of the hook 465 is H1, and the hook length is W1.

Preferably, as shown in fig. 18, the inner hole of the snap ring 450 is a positioning hole 452, and is in interference fit with the first shaft section 421 of the screw sleeve 420. Wherein, fig. 18(a) is a three-dimensional structure schematic diagram of the arc-shaped snap ring; fig. 18(b) is a schematic sectional structure view of the present arcuate snap ring. The opening height of the G-shaped groove is H2, and the width of the inside of the clamping groove is W2. Wherein H2> H1, W2> W1. The relative hook between the hook 465 and the snap ring 450 is shown in fig. 19, and fig. 19(a) is a schematic view showing the hook 465 and the snap ring 450 hooked and locked when the button 464 is not stressed. Fig. 19(b) is a schematic diagram showing the state where the hook 465 and the snap ring 450 are unlocked when the button 464 is pressed. Fig. 19(c) is a schematic view showing a state where the hook 465 and the holding ring 450 are disengaged when the button 464 is not subjected to a force.

This arc cutting ferrule 460's button 464 and pothook 465 for arc cutting ferrule 460 and handle housing 410 get in touch mutually through snap ring 450 and lock, realize the locking function of handle, no matter cam ring 431 rotates to quick release state or quick release state slowly, no matter rotatory or back pull handle housing 410, arc cutting ferrule 460 can not throw off with snap ring 450, guarantee vibration in the transportation and the mistake of using in-process to the handle bump and can not lead to the release in advance of support tectorial membrane section, guarantee the security of product use.

Preferably, the outer diameters of the proximal end of the handle housing 410, the positioning shoulder 423, the distal end of the cam ring 431, the proximal end of the cam ring 431, the snap ring 450 and the arc-shaped ferrule 460 are all equal, so that the handle is smooth and attractive in appearance and convenient to hold.

Preferably, the sheath moving device 440 includes a sheath connector 441, the sheath connector 441 is divided into a sheath connecting section 4411 and a transition section 4412 as a front view structure of the handle sheath connector shown in fig. 20 (b); the distal end of the sheath 300 is fixedly connected to the sheath connection section 4411 through the sheath locking nut 442; a guide plate 4413 is arranged on the outer peripheral surface of the far end of the transition section 4412, and a sealing hole 4414 is arranged at the inner hole of the far end of the transition section 4412; the guide plate 4413 is a near T-shaped guide plate as shown in fig. 20(a), and a vertical section of the guide plate 4413 passes through the sheath joint guide groove 531 of the screw 500 and moves in the sheath joint guide groove 531 to drive the sheath 300 to move axially; the horizontal section of the guide plate 4413 is clamped between the screw sleeve 420 and the handle housing; the transition section 4412 is provided with a middle pipe through hole for accommodating the middle pipe 900 along the axial direction; the middle pipe 900 is fixed on the sheath pipe joint 441 in a sealing manner through the end of the middle pipe through hole by a sealing ring 480 and a sealing threaded sleeve 490.

During the specific use, the handle is in initial condition: the arc-shaped clamping sleeve 460 is clamped with the clamping ring 450, the triangular position mark 4313 on the cam ring 431 points to the S of the handle shell 410, the limiting block 433 on the cam ring 431 is positioned at the left end of the arc-shaped limiting groove 4231 of the screw sleeve 420, the top arc of the two tooth plates 4322 is positioned in the shallow arc-shaped groove 4311 of the cam ring 431, the tooth plates 4322 are pressed downwards by the shallow arc-shaped groove 4311 and move downwards along the radial through hole 4221 on the screw sleeve 420, the spring plates 4323 supported in the spring plate groove 4222 are pressed downwards and flattened by the tooth plates 4322, and the tooth bodies 4321 are engaged with the trapezoidal threads on the screw 500.

After the intervention stent is sent to a designated position, two buttons 464 on the arc-shaped clamping sleeve 460 are pressed down, the two clamping hooks 465 and the clamping ring 450 are separated and unlocked, at the moment, the handle shell 410 is rotated, the tooth plate 4322 can make spiral motion in the trapezoidal thread of the screw 500, and the tooth plate 4322 can drive the screw sleeve 420, the handle shell 410, the sheath pipe joint 441 and the sheath pipe 300 to slowly move along the axial direction of the screw 500, so that the slow release of the intervention stent is realized.

When the interventional stent is slowly released into position, it is necessary to switch to quick release, moving cam ring 431 clockwise (looking proximally to distally) to rotate cam ring 431 by 50 degrees, and triangular index 4313 of cam ring 431 points to quick movement index F. At this time, the limiting block 433 of the cam ring 431 is located at the right end of the arc-shaped limiting groove 4231 of the screw sleeve 420, the two tooth plates 4322 rotate to the deep arc-shaped groove 4312 of the cam ring 431, and the two pressed reeds 4323 jack up the two tooth plates 4322 until the top arcs of the tooth plates 4322 are tangent to the arc tops of the deep arc-shaped groove 4312; at this time, the tooth plate 4322 is disengaged from the screw rod 500, and the handle housing 410 is quickly retracted along the screw rod 500, so that the screw rod sleeve 420, the sheath tube joint 441 and the sheath tube 300 are driven to quickly move along the axial direction of the screw rod 500, thereby realizing the quick release of the interventional stent.

According to the handle for realizing rapid and slow release of the interventional stent, the thumb touches the bulge on the periphery of the cam ring 431 and then pulls the cam ring 431, so that rapid switching of rapid and slow release states can be realized, and the operation is not required to be visually observed. And no matter which releasing state is in, the spring plate 4323 always pushes the tooth plate 4322 to the deep arc-shaped groove 4312 position or the shallow arc-shaped groove 4311 position of the cam ring 431, so that the tooth plate 4322 cannot automatically compress the spring plate 4323 to enter into another arc section from one arc section, and unless the cam ring 431 is manually stirred, the handle cannot be automatically switched between the quick and slow releasing states, so that the whole handle is safe and reliable to use.

After the interventional stent is released, the cam ring 431 is ensured to be in a quick release position, the arc-shaped clamping sleeve 460 is withdrawn, when the inclined plane of the clamping hook is contacted with the clamping ring, the clamping hook is extruded by the clamping ring to bend downwards until the clamping hook 465 slides into the G-shaped groove 451 of the clamping ring 450 to be hooked and locked with the clamping ring 450 again. At this time, when the delivery system is withdrawn, no matter which part of the handle is held by hands, the guiding head and the rear releasing mechanism are not caused to be separated from the sheath tube 300 no matter the handle is pulled to withdraw or rotated to withdraw, and further, the size mutation and the operation difficulty when the sheath tube, the rear releasing mechanism and the guiding head are withdrawn from the femoral artery incision in sequence are avoided.

Example 3

An interventional stent transporter comprising the front end rear release mechanism of embodiment 1, as shown in fig. 21, further comprising:

a guide head 100, the distal end of which is fixed on the threaded shaft 211 of the first stopper 210 of the front-end rear release mechanism;

the far end of the screw 500 is sequentially provided with the holding sleeve shaft 540, the release sleeve shaft 550 and the luer taper threaded shaft 560;

a sheath tube 300, the proximal end of which is slidably sleeved on the guide head 100, and the distal end of which is slidably connected to the screw rod 500 through a sheath tube joint 441;

a core tube 800 having one end fixed to the guide head 100 and the other end fixed to a luer taper joint 790;

a middle tube 900, the proximal end of which extends out of at least the proximal end of the screw 500, and the distal end of which is fixed to the screw 500 through a middle tube joint; the axial line is provided with a core tube through hole 901 for penetrating the core tube 800, and the outer side of the core tube through hole 901 is provided with a wire drawing through hole 902 for penetrating the wire drawing 600.

The use method of the interventional stent transporter comprises the following steps:

s501, the stent ring of the interventional stent, which is only left at the proximal end, is fixed to the transition axis 213 of the first limiting member 210 by the moving claws 220 and claw grooves (2031, 2041); in particular, fig. 22(b) is a schematic view of the matched structure of the interventional stent completely pushed out of the sheath 300. At this time, the release sleeve 760 is attached to the holding sleeve 730, the index 765 of the release sleeve 760 points to the locking indicator 731 of the holding sleeve 730, the guide jaw 782 of the guide post 780 is located in the guide slot fixing hole 5513 of the screw 500, and at this time, the distance between the metal block 740 and the moving jaw 220 is just equal to the length of the rear release wire 600;

s502, the user holds the grip sleeve 730 with his left hand, holds the release sleeve 760 with his right hand, and rotates the release sleeve 760 to rotate the index 765 from the locking index 731 to the unlocking index 732 of the grip sleeve 730, at which time the guide finger 782 of the guide post 780 is rotated from the guide slot fixing hole 5513 to the proximal end of the long arm 5511 via the short arm 5512; because the metal block 740 is in clearance fit with the metal block annular groove 762 of the release sleeve 760, the metal block 740 does not rotate the pull wire 600.

S503, withdrawing the release sleeve 760, wherein the guiding claw 782 of the guiding post 780 slides from the proximal end of the long supporting arm 5511 to the distal end, and at the same time, the metal block 740, the wire 600 and the moving claw 220 are withdrawn until the claw head 222 of the moving claw 220 moves to the proximal end of the second stopper 230 and is stopped; since the total length of the claw body 221 and the claw head 222 is equal to the total length of the rear disc 214 and the claw shaft 215, at this time, the claw body 221 is completely separated from the transition shaft 213, and the stent ring clamped to the transition shaft 213 is released, thereby completing the front-end rear release process of the interventional stent, specifically, see fig. 22(c) for a schematic view of a matching structure in which the interventional stent is completely released.

Example 4

Different from the above embodiments, the interventional stent delivery device of the present embodiment, including the guide head 100, the sheath 300, the screw 500 and the handle 400 of embodiment 2, can realize the fast and slow release of the interventional stent.

The steps of using the interventional stent transporter of the present embodiment are as follows:

s301, in the slow release process, the interventional stent is sent to a designated position, at this time, see the schematic diagram of the fitting structure that the interventional stent in fig. 22(a) is constrained by the sheath tube 300 and is in a completely tightened state, then the two buttons 464 on the arc-shaped cutting sleeve 460 are pressed down, the two hooks 465 and the snap ring 450 are disengaged and unlocked, at this time, the handle housing 410 is rotated, the tooth plate 4322 performs a spiral motion in the trapezoidal thread of the screw 500, and the tooth plate 4322 drives the screw sleeve 420, the handle housing 410, the sheath tube joint 441, and the sheath tube 300 to slowly move along the axial direction of the screw 500, thereby realizing and completing the slow release of the interventional stent;

s401, in the quick release process, the cam ring 431 is stirred, so that the cam ring 431 rotates until the triangular position scale 4313 points to the quick movement mark F; at this time, the limiting block 433 of the cam ring 431 is located at the right end of the arc-shaped limiting groove 4231 of the screw sleeve 420, the two tooth plates 4322 rotate to the deep arc-shaped groove 4312 of the cam ring 431, and the two pressed reeds 4323 jack up the two tooth plates 4322 until the top arcs of the tooth plates 4322 are tangent to the arc tops of the deep arc-shaped groove 4312; at this time, the tooth plate 4322 is disengaged from the screw rod 500, and the handle housing 410 is quickly retracted along the screw rod 500, so that the screw rod sleeve 420, the sheath tube joint 441 and the sheath tube 300 are driven to quickly move along the axial direction of the screw rod 500, thereby realizing and completing the quick release of the interventional stent. After the quick release, the interventional stent is completely pushed out of the sheath 300 as shown in fig. 22 (b).

Example 5

Unlike the previous embodiments, the interventional stent transporter of the present embodiment includes a guide head 100, a sheath 300, a screw 500, a front-end rear release mechanism of embodiment 1, and a handle 400 as described in embodiment 2.

s1, in an initial state, the stent ring inserted into the proximal end of the stent is fixed to the transition shaft 213 of the first stopper 210 by the moving claws 220 and the claw grooves (2031, 2041), and is folded and disposed in the sheath 300, the proximal end of the sheath 300 is sleeved on the guide head 100, and the moving claws 220 are completely inserted into the claw grooves 2031;

the hook 465 of the arc-shaped cutting sleeve 460 is hooked and locked with the G-shaped groove 451 of the clamping ring 450 (see fig. 19a), the triangular position mark 4313 on the cam ring 431 points to the slow-speed rotation moving mark S on the handle shell 410, the limiting block 433 on the cam ring 431 is positioned at the left end of the arc-shaped limiting groove 4231 of the screw sleeve 420, the top arcs of the two tooth plates 4322 are positioned in the shallow arc-shaped groove 4311 of the cam ring 431, the tooth plates 4322 are pressed downwards by the shallow arc-shaped groove 4311 and move downwards along the radial through hole 4221 on the screw sleeve 420, the reed 4323 supported in the reed groove 4222 is pressed downwards by the tooth plates 4322 to be flattened, and the tooth plates 4321 are meshed with the trapezoidal thread on the screw 500;

the release sleeve 760 is attached to the holding sleeve 730, the index 765 of the release sleeve 760 points to the locking indicator 731 of the holding sleeve 730, the guide pawl 782 of the guide post 780 is located in the guide slot fixing hole 5513 of the screw 500, and at this time, the distance between the metal block 740 and the moving pawl 220 is just equal to the length of the rear release wire 600;

s2, conveying the interventional stent to a designated position;

s3, in the slow release process, when the two buttons 464 on the arc-shaped ferrule 460 are pressed down, the two hooks 465 and the snap ring 450 are disengaged and unlocked, and at this time, the handle housing 410 is rotated, the tooth plate 4322 performs a spiral motion in the trapezoidal thread of the screw 500, and the tooth plate 4322 drives the screw sleeve 420, the handle housing 410, the sheath tube joint 441, and the sheath tube 300 to slowly move along the axial direction of the screw 500, thereby achieving and completing the slow release of the interventional stent;

s4, quick release process, poking the cam ring 431 to make the cam ring 431 rotate to the triangle index 4313 pointing to the quick moving index F; at this time, the limiting block 433 of the cam ring 431 is located at the right end of the arc-shaped limiting groove 4231 of the screw sleeve 420, the two tooth plates 4322 rotate to the deep arc-shaped groove 4312 of the cam ring 431, and the two pressed reeds 4323 jack up the two tooth plates 4322 until the top arcs of the tooth plates 4322 are tangent to the arc tops of the deep arc-shaped groove 4312; at this time, the tooth plate 4322 is disengaged from the screw 500, and the handle housing 410 is quickly retracted along the screw 500, so that the screw sleeve 420, the sheath tube joint 441 and the sheath tube 300 can be driven to quickly move along the axial direction of the screw 500, thereby realizing and completing the quick release of the interventional stent;

s5, front end rear release process, after the interventional stent is rapidly released, only the stent ring at the proximal end of the interventional stent is fixed to the transition shaft 213 of the first limiting member 210 by the moving claws 220 and the claw grooves (2031, 2041); rotating the release sleeve 760 to rotate the index 765 from the locking indicator 731 to the unlocking indicator 732 of the grip sleeve 730, and simultaneously rotating the guide finger 782 of the guide post 780 from the guide slot fixing hole 5513 to the proximal end of the long arm 5511 via the short arm 5512; because the metal block 740 is in clearance fit with the metal block annular groove 762 of the release sleeve 760, the metal block 740 cannot drive the drawing wire 600 to rotate; then, the release sleeve 760 is withdrawn, and the guide pawl 782 of the guide post 780 slides from the proximal end of the long support arm 5511 to the distal end, and at the same time, the metal block 740, the wire 600 and the moving pawl 220 are withdrawn until the pawl head 222 of the moving pawl 220 moves to the proximal end of the second stopper 230 and is stopped; since the total length of the claw body 221 and the claw head 222 is equal to the total length of the rear disc 214 and the claw shaft 215, at this time, the claw body 221 is completely separated from the transition shaft 213, and the stent ring clamped on the transition shaft 213 is released, thereby completing the front-end rear release process of the interventional stent;

s6, during the locking stage of the guide head 100, it is determined that the cam ring 431 is in the quick release position, and the arc-shaped clamp sleeve 460 is withdrawn, so that when the inclined surface of the clamp hook contacts with the clamp ring, the clamp hook will be pushed by the clamp ring to bend downwards until the clamp hook 465 slides into the G-shaped groove 451 of the clamp ring 450, and re-hooked and locked with the clamp ring 450, at this time, the distal end of the guide head 100 returns to the sheath 300 and is locked.

S7, the conveyor is wholly withdrawn.

It should be noted that the above-described embodiments may enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. Therefore, although the present invention has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention.

Claims

1. A front-end and rear-end release mechanism of an interventional stent conveyor is characterized by comprising

2. The front-end rear release mechanism of an interventional stent transporter of claim 1, wherein the guide locking mechanism comprises a guide post and an L-shaped guide slot provided on an outer surface of the screw, the guide post comprising a positioning post and at least two resilient guide claws provided at one end of the positioning post; the long supporting arm of the L-shaped guide groove is axially arranged along the screw rod and is in clearance fit with the elastic guide claw; the short support arm of the L-shaped guide groove is arranged along the circumferential direction of the screw and is in interference fit with the elastic guide claw; the short support arm extends to be equipped with the guide way fixed orifices, the guide way fixed orifices with the elasticity direction claw is clearance fit.

3. The front-end rear-release mechanism of an interventional stent conveyor according to claim 2, wherein the upper end and the lower end of the metal block are positioning arc surfaces which are in clearance fit with the inner cylindrical surface of the metal block ring groove; the metal block comprises a cutting groove extending from top to bottom through the axis of the metal block, and the cutting groove divides the metal block into two half parts connected only at the lower end; and the drawn wire is fixed in a drawn wire hole in the cutting groove.

4. The front-end rear-release mechanism of an interventional stent transporter, according to claim 3, wherein the rear-end assembly further comprises a holding sleeve fixed on the outer surface of the screw rod in a sleeved manner, the outer surface of the distal end of the holding sleeve is provided with a locking indicator and an unlocking indicator, and the corresponding outer surface of the proximal end of the release sleeve is provided with a position indicator for indicating the rotation position of the release sleeve; the included angle between the locking indicator and the unlocking indicator is related to the circumferential length of the short support arm.

5. The front-end rear release mechanism of an interventional stent transporter of claim 4, wherein the inner bore of the release sleeve comprises, in order from the proximal end to the distal end, a first screw bore section, a metal block ring groove, a second screw bore section, and a luer taper joint bore section; the first screw hole section and the second screw hole section are slidably sleeved on a release sleeve shaft of the screw; the far end of the screw is fixedly connected with the luer cone connector through a luer cone threaded shaft, and the hole section of the luer cone connector is sleeved on the outer side of the luer cone connector in a sliding mode.

6. The front-end rear release mechanism of an interventional stent conveyor as claimed in claim 3, wherein the rear end assembly further comprises a middle tube joint fixed in the screw, a middle tube fixing hole for accommodating and fixing the middle tube is formed in the middle tube joint, the core tube is inserted into the core tube through hole of the middle tube, and the middle tube further comprises a wire drawing through hole arranged in parallel with the core tube through hole; the axial line position of the metal block is provided with a core tube hole and a wire drawing hole corresponding to the core tube through hole and the wire drawing through hole; and wire drawing fastening screw holes for screwing wire drawing fastening screws are formed in the two half parts of the metal block.

7. The front-end and rear-end release mechanism of an interventional stent conveyor as claimed in claim 6, wherein the outer side surface of the middle pipe joint is symmetrically provided with limiting columns in a radially extending manner, and the limiting columns are provided with radial through holes; the radial through hole is a threaded hole with the axis vertical to the middle pipe joint, and a set screw is screwed into the radial through hole to lock the middle pipe; and a middle pipe joint limiting hole for fixing the limiting column is further formed in the screw.

8. The front-end rear release mechanism of an interventional stent transporter, according to claim 1, wherein the first retainer comprises, from a proximal end to a distal end, a threaded shaft, a front disk transition shaft, a rear disk and a claw shaft, wherein each of the front disk and the rear disk is provided with a claw groove matched with the claw body, and the length of the claw body is equal to the total length of the front disk, the transition shaft and the rear disk; the far end of the claw body extends inwards to form a claw head, a central hole of the claw head is sleeved on the claw shaft, and the total length of the claw body and the claw head is equal to the total length of the rear disc and the claw shaft; a wire drawing fixing hole is formed between the two claw bodies of the claw head; the far end of claw axle extends and is equipped with the lantern ring axle, the surface of claw axle and lantern ring axle is equipped with the wire drawing groove, the second locating part cup joints the lantern ring axle.

9. The front end rear release mechanism of an interventional stent transporter of claim 8, wherein the length of the long arm is greater than the total length of the front disk and the transition shaft.

10. An interventional stent transporter, comprising the front end rear release mechanism of any one of claims 1-9, and further comprising:

11. The interventional stent transporter of claim 10, further comprising a handle capable of quick and slow release, the handle comprising a handle housing and a screw sleeve within the handle housing, one end of the handle housing having an axially extending portion of the screw sleeve, the axially extending portion having a cam ring quick and slow switching mechanism disposed thereon; the cam ring fast-slow switching mechanism comprises a cam ring and a telescopic dental plate; the telescopic dental plates extend inwards to form dental bodies along the radial direction of the cam ring; the outer surface of the telescopic dental plate is in contact connection with the concave-convex inner surface of the cam ring; the screw rod sleeve is provided with a screw rod, a tooth body and a screw rod, wherein the tooth body is positioned in a radial through hole of the screw rod sleeve, can extend out of the radial through hole and is meshed and connected with threads on a screw rod arranged in the screw rod sleeve so as to realize sliding type quick movement and rotary type slow movement of the screw rod sleeve along the screw rod; a pair of shallow arc-shaped grooves and a pair of deep arc-shaped grooves are symmetrically distributed in the inner hole of the cam ring along the circumferential center to form the concave-convex inner surface; the tooth body is an inner trapezoidal thread matched with the trapezoidal thread of the screw rod; the difference between the radial groove depths of the shallow arc-shaped groove and the deep arc-shaped groove is not less than the height of the tooth body; the screw sleeve sequentially comprises a first shaft section, a second shaft section, a positioning shoulder and a third shaft section; the outer diameters of the first shaft section, the second shaft section and the positioning shoulder are sequentially increased; the cam ring is in clearance fit with the second shaft section, and axial positioning is realized through the positioning shoulder and a clamping ring fixed on the first shaft section; the handle housing is secured to the third shaft segment.

12. The interventional stent transporter of claim 11, wherein the handle further comprises an arc-shaped ferrule, the arc-shaped ferrule comprises a sheath sleeve positioning hole section, a screw positioning hole section and a button hole section with sequentially increasing inner diameters, and two buttons are symmetrically arranged on the button hole section; one end of the button is connected with the cylinder wall of the screw positioning hole section, the other end of the button extends to the edge of the button hole section along the axial direction, and a clamping hook is continuously extended and arranged, and the clamping hook is clamped in the G-shaped groove of the clamping ring; a limiting block extends axially from the side where the guide hole of the cam ring is located, and an arc-shaped limiting groove is formed in the end face of the corresponding positioning shoulder of the screw sleeve; the limiting block slides in the arc-shaped limiting groove along with the rotation of the cam ring, and two limiting positions of the limiting block sliding in the arc-shaped limiting groove are positioned at the groove bottom of the shallow arc-shaped groove and the groove bottom of the deep arc-shaped groove respectively corresponding to the outer surface of the telescopic dental plate; the telescopic tooth plate comprises a tooth plate and a reed, and a reed hole is formed in the center of the tooth plate; the reed is an arched spring piece which is arranged in the reed hole in a penetrating way, the support leg of the reed faces inwards, and the arched top of the reed is abutted against the top of the reed hole; the corresponding screw rod sleeve is provided with a reed groove in a cross shape with the radial through hole; the reed groove is preferably a blind groove, and the support legs of the reed are pressed in the reed groove through the tooth plate and the cam ring; the outer surface of the cam ring is opposite to the shallow arc-shaped groove and is provided with an indication position mark; a fast moving mark F and a slow rotating moving mark S are arranged on the corresponding handle shell; the included angle between the shallow arc-shaped groove and the deep arc-shaped groove is 50 degrees, and the included angle between the two limit positions of the corresponding arc-shaped limiting grooves is 50 degrees; the included angle between the fast sliding moving mark and the slow rotating moving mark is 50 degrees.

13. The interventional stent transporter of claim 10 or 11, wherein the handle further comprises a sheath connector, a sheath connection section of the sheath connector securing the sheath with a sheath locking nut; a guide plate is arranged on the peripheral surface of the sheath pipe joint; the guide plate is a near T-shaped guide plate, and the vertical section of the guide plate penetrates through the sheath pipe joint guide groove on the screw rod and moves in the sheath pipe joint guide groove to drive the sheath pipe to move along the axial direction; the horizontal section of the guide plate is clamped between the screw rod sleeve and the second handle; the sheath pipe joint is axially provided with a middle pipe through hole for accommodating a middle pipe; the tail end of the middle pipe through hole is used for sealing and fixing the middle pipe on the sheath pipe joint through a sealing ring and a sealing threaded sleeve.

14. A method of using the interventional stent transporter of claim 10, comprising the steps of:

s501, only the bracket ring at the near end of the interventional bracket is fixed at the transition shaft of the first limit position by the movable claw and the claw groove; the release sleeve is attached to the holding sleeve, the position mark of the release sleeve points to the locking indicator mark of the holding sleeve, the guide claw of the guide post is positioned in the guide groove fixing hole of the screw, and at the moment, the distance between the metal block and the moving claw is just equal to the length of the rear release wire;

15. A method of using the interventional stent transporter of claim 13, comprising the steps of:

s2, conveying the interventional stent to a designated position;

s7, the conveyor is wholly withdrawn.