CN113367843B

CN113367843B - Delivery system for interventional instruments

Info

Publication number: CN113367843B
Application number: CN202110461660.XA
Authority: CN
Inventors: 雷荣军; 吴永健; 高润霖; 王翔; 朱灵珂
Original assignee: Hangzhou Qiming Medical Devices Co ltd
Current assignee: Hangzhou Qiming Medical Devices Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2023-08-15
Anticipated expiration: 2041-04-27
Also published as: CN113367843A

Abstract

The application discloses a conveying system of an interventional instrument, which comprises an operating handle and a pipe fitting movably arranged on the operating handle, and further comprises a pipe fitting locking device; the pipe fitting locking device includes: a housing mounted to the operating handle; the clamping pieces are movably installed in the shell in pairs, a pipe fitting threading channel is arranged between the clamping pieces in the same pair, and the clamping pieces are provided with clamping parts matched with the contour shape of the pipe fitting; the driving piece is movably arranged in the shell and is provided with a driving inclined plane towards one side of the clamping piece, and the driving piece pushes the clamping piece to move in opposite directions through the driving inclined plane when moving so as to position the pipe fitting. The conveying system of the interventional instrument disclosed by the application realizes the positioning and releasing of the pipe fitting through the arrangement of the pipe fitting locking device, has a simple and stable structure, can effectively improve the operation experience of a user and improves the treatment effect.

Description

Delivery system for interventional instruments

Technical Field

The application relates to the field of medical equipment, in particular to a conveying system of an interventional instrument.

Background

The use of medical devices requires that the components cooperate to perform a function, particularly during interventional procedures. The interventional instrument delivery system generally comprises a sheath core assembly and a sheath tube which is sleeved outside the sheath core assembly in a sliding manner, for example, a prosthetic heart valve, wherein the sheath core assembly and the sheath tube form the sheath tube assembly, the distal end of the sheath tube assembly can enter the vascular system of a human body, the proximal end of the sheath tube assembly is connected with an operation handle, and the direction of the distal end of the sheath tube assembly needs to be adjusted and controlled to move to a target position based on the tortuous characteristic of the vascular system of the human body and the consideration of remote operation. In order to achieve the above objective, the pipes need to move or lock each other at proper time, and meanwhile, drive requirements are also provided for the operation handle, so that operators such as clinicians need to meet the technical requirements of convenient holding, convenient adjustment and accurate positioning when using the operation handle.

Disclosure of Invention

In order to solve the technical problems, the application discloses a conveying system of an interventional instrument, which comprises an operating handle and a pipe fitting movably arranged on the operating handle, and the conveying system also comprises a pipe fitting locking device; the pipe fitting locking device includes:

a housing mounted to the operating handle;

the clamping pieces are movably installed in the shell in pairs, a pipe fitting penetrating channel is arranged between the clamping pieces in the same pair, and clamping parts matched with the contour shape of the pipe fitting are arranged on the clamping pieces;

the driving piece is movably arranged in the shell and is provided with a driving inclined plane towards one side of the clamping piece, and the driving piece pushes the clamping piece to move in opposite directions through the driving inclined plane when moving so as to position the pipe fitting.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the housing in the tube locking device is fixed or slip fit relative to the operating handle.

Optionally, the pipe fitting is equipped with a plurality of and inside and outside nested setting in proper order, and inside and outside adjacent pipe fitting is restrained by the holder of pipe fitting locking device.

Alternatively, one of the inner and outer adjacent pipes is an inner pipe, the other is an outer pipe, one of the inner pipe and the outer pipe is fixed with the shell of the pipe locking device, and the other is restrained by the clamping piece of the pipe locking device.

Optionally, the pipe locking device is provided with at least two pairs of clamping members, and is used for positioning the inner pipe and the outer pipe respectively.

Optionally, at least three pipe fittings are provided, at least two pipe fitting locking devices are provided, two arbitrary adjacent pipe fittings are positioned by corresponding pipe fitting locking devices, and all pipe fitting locking devices are sequentially arranged in the axial direction of the pipe fitting.

Optionally, the operating handle includes a support section of thick bamboo, be equipped with on the support section of thick bamboo along the operation window that the pipe fitting axial was seted up, pipe fitting locking device slidable mounting in the support section of thick bamboo and at least a portion expose to the operation window.

Optionally, the center line of the pipe fitting threading channel is used as a reference line, the distance between the driving inclined planes of the same pair at the position of the reference line is used as a fit clearance, and in the moving process of the driving piece, the fit clearance is changed to drive the clamping pieces of the same pair to move in opposite directions or in opposite directions, so that the pipe fitting is correspondingly clamped or released.

Optionally, the extending direction of the central line of the pipe fitting threading channel is an X direction, the relative moving direction of the pair of clamping pieces is a Y direction, the moving direction of the driving piece is a Z direction, and the X direction, the Y direction and the Z direction form a space coordinate system in space;

and when the driving pieces move in the same direction, the width change of the fit clearance corresponds to the extending trend of the first V shape.

Optionally, from the perspective of the Z direction, the driving bevel on the same driving member is a second V-shape with an opening facing the pipe threading channel, two auxiliary bevels are formed on two sides of the corner of the second V-shape, and the clamping member corresponding to the driving member is located between the two auxiliary bevels.

Optionally, the interventional device in the conveying system of the interventional device in the above technical solution is an artificial heart valve.

The conveying system of the interventional instrument disclosed by the application realizes the positioning and releasing of the pipe fitting through the arrangement of the pipe fitting locking device, has a simple and stable structure, can effectively improve the operation experience of a user and improves the treatment effect.

The application also discloses a pipe fitting locking device, which comprises:

a housing;

The driving piece is movably arranged in the shell, one side of the driving piece, which faces the clamping piece, is provided with a driving inclined plane, and the driving piece pushes the clamping pieces of the same pair to move in opposite directions through the driving inclined plane when moving so as to position the pipe fitting;

optionally, the driving members are arranged in pairs, the movement direction of each driving member is perpendicular to the axial direction of the pipe fitting, and the driving inclined surfaces of the driving members of the same pair are arranged in opposite directions so as to drive the clamping members of the same pair. Optionally, the center line of the pipe fitting threading channel is used as a reference line, the distance between the driving inclined planes of the same pair at the position of the reference line is used as a fit clearance, and in the moving process of the driving piece, the fit clearance is changed to drive the clamping pieces of the same pair to move in opposite directions or in opposite directions, so that the pipe fitting is correspondingly clamped or released.

Optionally, the extending direction of the central line of the pipe fitting threading channel is an X direction, the relative moving direction of the pair of clamping pieces is a Y direction, the moving direction of the driving piece is a Z direction, and the X direction, the Y direction and the Z direction form a space coordinate system in space.

Optionally, the X direction, the Y direction and the Z direction are perpendicular to each other.

Optionally, in view of the X direction, the driving inclined planes of the same pair of driving members are approximately in a first V shape after extending and intersecting, and when the same pair of driving members move in the same direction, the width change of the fit clearance corresponds to the extending trend of the first V shape.

Optionally, the two auxiliary inclined planes are in smooth transition.

Optionally, in the X direction, the fit gap gradually becomes larger and then gradually becomes smaller, and the variation trend corresponds to the extension trend of the second V-shape.

Optionally, the shape of the outer peripheral surface of the clamping piece is matched with the shape of the driving inclined surface of the corresponding driving piece.

Optionally, the clamping member is in line contact with the corresponding driving bevel in view of the X direction.

Optionally, in the Z direction, the driving member has a first movement direction for narrowing the fit gap and a second movement direction for widening the fit gap, and a retaining member for driving the driving member in the first movement direction is provided between the driving member and the housing.

Optionally, the driving member has a locking position for driving the gripping member to position the tubular and a release position for allowing movement of the tubular,

the driving member includes:

the sliding block is movably arranged on the shell along the Z direction, faces the side wall of the pipe fitting penetrating channel and simultaneously provides the driving inclined plane and the two auxiliary inclined planes;

An elastic member acting between the slider and the housing for holding the driving member in the locking position;

and the unlocking piece is movably arranged on the shell and is used for driving the driving piece to enter the release position against the action of the retaining piece.

Optionally, the holding member is an elastic member disposed between the driving member and the housing, and a positioning chamber for accommodating at least a portion of the elastic member is disposed on the driving member.

Optionally, each driving member is provided with at least two elastic members, and each elastic member is sequentially arranged in the axial direction of the pipe.

Optionally, the unlocking piece is a sliding block slidably mounted on the shell, and a guiding structure matched with the shell is arranged on the side surface of the sliding block.

Optionally, the unlocking piece is provided with an anti-falling edge for preventing the unlocking piece from falling out of the shell, and the shell is provided with a release area for avoiding the unlocking piece to move.

Optionally, a driving cavity communicated with the release area is further arranged in the shell, and the driving cavity is used for installing the driving piece.

Optionally, the pipe fitting has many and mutually nested setting, and a set of locking subassembly is constituteed to a pair of holder and a pair of driving piece, including two sets of locking subassemblies in the pipe fitting locking device at least, each locking subassembly locks different pipe fittings respectively.

Optionally, a positioning structure matched with the clamping piece is arranged in the shell, and the clamping piece is restrained in the positioning structure and can move in a preset range so as to clamp or release the pipe fitting.

Optionally, the driving member has a first movement direction that narrows the fit gap and a second movement direction that widens the fit gap during movement of the driving member; the driving inclined planes of the same pair of driving pieces are matched with each other to form a first V-shape, the driving inclined planes on the same driving piece are of a second V-shape with openings facing the pipe fitting penetrating channel, and the clamping piece is driven by the first V-shape and the second V-shape to clamp or release the pipe fitting.

Optionally, the location structure is including setting up the reference column in the casing, the holder through setting up the mounting hole on self with the reference column cooperation, the aperture of mounting hole is greater than the external diameter of reference column.

Optionally, the positioning structure further includes a positioning baffle, and the positioning baffle is disposed on the periphery of the clamping member to restrict the limiting position of the clamping member.

Optionally, the positioning baffle is equipped with two and symmetrical arrangement at least, is equipped with on each positioning baffle and supplies the reference column wears to establish the locating hole, the positioning baffle with the holder surrounds and forms the pipe fitting is worn to draw the passageway.

Optionally, the clamping member is columnar and concave in the middle in the axial direction to form the clamping portion.

Optionally, the clamping piece is dumbbell-shaped.

Optionally, the clamping member is cylindrical and is necked down at a central portion in an axial direction to form the clamping portion.

Optionally, the radial dimension of one end of the clamping piece is slightly larger than the radial dimension of the other end, and the peripheral buses of the two ends are located on the same plane, and the plane is matched with the driving inclined plane of the corresponding side.

Optionally, the clamping member and the driving member are metal members.

Optionally, the housing and the tube are non-metallic pieces.

Optionally, the fitting part of the pipe fitting and the clamping part is provided with an antiwear structure.

Optionally, a positioning sleeve is further covered outside the shell, and an operation port is formed in the positioning sleeve and used for exposing an unlocking piece which causes the driving piece to act.

Optionally, a pair of clamping members and a pair of driving members form a group of locking assemblies, the pipe locking device at least comprises two groups of locking assemblies, and the shell is provided with at least two operation ports and respectively corresponds to the driving members of the locking assemblies.

Optionally, the driving member has a locking position for driving the gripping member to position the pipe and a release position for allowing movement of the pipe, the driving member further comprising:

The unlocking piece is movably arranged on the shell and is used for driving the driving piece to enter the release position;

the operation port is set as follows:

the unlocking piece protrudes out of the operation port; or (b)

The size of the operation opening is smaller than that of the unlocking piece.

Optionally, the positioning sleeve is cylindrical and has two open ends.

Optionally, the inside pipe fitting that runs through of casing is worn to draw the passageway, the pipe fitting is worn to draw the passageway upper and lower both sides and is equipped with and is used for installing the locating baffle of holder, pipe fitting is worn to draw the passageway left and right sides and is linked together with the drive chamber, the drive chamber is used for installing the driver.

Optionally, a spacer is disposed between the positioning baffle and the housing in the axial direction of the pipe.

Optionally, at least two sets of locking components are arranged in the shell, and the locking components are separated by a separation plate.

According to the pipe fitting locking device disclosed by the application, the positioning and releasing of the pipe fitting are realized through the matching of the driving piece and the clamping piece, the structure is simple and stable, the operation experience of a user can be effectively improved, and the treatment effect is improved.

The interventional instrument conveying system can be applied to the field of interventional instruments such as artificial heart valve replacement conveying systems, artificial heart valve repair conveying systems, plugging device implantation and the like.

Specific advantageous technical effects will be further explained in the detailed description in connection with specific structures or steps.

Drawings

FIG. 1a is a schematic diagram of a delivery system for a handling tool according to one embodiment;

FIG. 1b is a schematic illustration of the internal structure of the delivery system of the interventional instrument of FIG. 1 a;

FIG. 1c is a schematic view of the pipe locking device in operation;

FIG. 1d is a schematic view of an embodiment of a specific use scenario of a mechanical delivery system;

FIG. 2a is a schematic view of a pipe locking device according to an embodiment;

FIG. 2b is a schematic view of the internal structure of the pipe locking device of FIG. 2 a;

FIG. 2c is a schematic view of the internal assembly of the housing of the pipe locking device of FIG. 2 a;

FIG. 2d is a schematic view of the internal structure of the locking assembly of the pipe locking device of FIG. 2 a;

FIG. 3a is a schematic diagram of a driving member according to an embodiment;

FIG. 3b is a schematic side view of the pair of driving members of FIG. 3 a;

FIG. 3c is a schematic top view of the pair of driving members of FIG. 3 a;

FIG. 4a is a schematic view of a structure of a clamping member according to an embodiment;

FIG. 4b is a schematic view of the internal structure of the clamping member in FIG. 4 a;

FIG. 4c is a schematic side view of the clamp of FIG. 4 a;

FIG. 5 is a schematic diagram illustrating the operation of a locking assembly according to an embodiment;

FIG. 6a is a schematic view of a housing structure according to an embodiment;

FIG. 6b is a schematic view of the internal structure of the housing in FIG. 6 a;

fig. 6c is a schematic view of a bottom structure of an unlocking member according to an embodiment.

Reference numerals in the drawings are described as follows:

1. a pipe fitting;

2. a tube locking device;

21. a housing; 213. positioning a baffle; 214. positioning holes; 215. a release zone; 217. a drive chamber; 218. a partition plate;

22. a clamping member; 221. a clamping part; 222. a mounting hole;

23. a pipe fitting threading channel;

24. a driving member; 241. a driving inclined plane; 2411. an auxiliary inclined plane; 242. a fit gap; 243. a holder; 244. an unlocking member; 245. a positioning chamber; 246. a guide structure; 247. edge drop prevention;

25. a positioning sleeve; 251. an operation port;

3. an operation handle; 31. a support cylinder; 32. an operation window;

4. an interventional instrument.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1a to 1c, the application discloses a delivery system of an interventional instrument, comprising an operating handle 3 and a tube 1 movably arranged on the operating handle 3, the delivery system further comprising a tube locking device 2; the tube locking device 2 is for positioning a tube 1 in a medical instrument and comprises:

a housing 21 mounted to the operation handle 3;

the clamping pieces 22 are movably installed in the shell 21 in pairs, a pipe fitting threading channel 23 is arranged between the clamping pieces 22 in the same pair, and a clamping part 221 matched with the contour shape of the pipe fitting 1 is arranged on the clamping piece 22;

The driving piece 24 is movably arranged in the shell 21 and is provided with a driving inclined surface 241 on one side facing the clamping piece 22, and the driving piece 24 pushes the clamping piece 22 to move oppositely through the driving inclined surface 241 when moving so as to position the pipe fitting 1.

Details on how the pipe locking device 2 achieves locking of the pipe 1 are described in detail below in relation to the pipe locking device, and will not be deployed here. The delivery system of the interventional instrument achieves locking of the tube 1 by means of the tube locking device 2, thereby achieving manipulation of the specific tube 1. The operation may be represented as the actuation of the pipe element 1 by releasing the locking assembly, as well as the positioning between the pipe element 1 and the pipe element locking device 2 by the locking assembly and the actuation of the pipe element 1 by actuating the pipe element locking device 2. The different use modes of the locking pipe fitting 1 provide rich choices for the setting modes of the medical apparatus. In reference to an embodiment, the tube locking device 2 is fixed or slip-fitted relative to said operating handle 3.

In terms of the number of the pipe elements 1, the pipe elements 1 can be single, and in the embodiment shown in the drawings, the pipe elements 1 are provided with a plurality of pipe elements, and are nested inside and outside each other, at least one of the pipe elements 1 is penetrated from the pipe element penetrating channel 23 and is restrained by the clamping piece 22. For convenience of description, one of the inner and outer adjacent tubes 1 is an inner tube, and the other is an outer tube. Different arrangements may be adopted for the use needs of different tubular members 1, for example with reference to the delivery system of the interventional instrument shown in fig. 1a, comprising an outer tube and an inner tube, at the distal end of which the tubular member 1 may optionally be directly fixed to the operating handle 3; as also shown for example with reference to fig. 1b, the tubular element 1 may alternatively be directly fixed to a mobile part of the operating handle 3 and this mobile part is subjected to an axial movement by means of a driving mechanism on the operating handle 3, for example by means of a threaded rotation; referring again to fig. 1c for example, in one embodiment, the pipe locking device 2 is provided with at least two pairs of clamps 22, for positioning the inner and outer pipes, respectively; as further shown in fig. 1b, for example, one of the inner and outer tubes is fixed to the housing 21 of the pipe locking device 2, the other is restrained by the clamp 22 of the pipe locking device 2, and so on.

The specific fixing form of the pipe fitting and the matching relation between the shell of the pipe fitting locking device 2 and the operating handle 3 also have a certain relation. For example, when the housing is fixedly arranged with the operating handle 3, the pipe fitting fixed to the housing can also be understood as being fixedly arranged with the operating handle 3.

In the scheme of sleeving the multiple pipe fittings 1, the arrangement of the pipe fitting locking devices 2 is more flexible, in the reference embodiment, at least three pipe fittings 1 are arranged, at least two pipe fitting locking devices 2 are arranged, any two adjacent pipe fittings 1 are mutually positioned through the corresponding pipe fitting locking devices 2, and all pipe fitting locking devices 2 are sequentially arranged in the axial direction (namely, the X direction) of the pipe fitting 1.

In this embodiment, the pipe fitting locking devices 2 are sequentially arranged in the axial direction, so that the locking at any position between different pipe fittings 1 can be realized, the operation is convenient, the movement of each pipe fitting 1 can share the movement stroke of the same section of the operation handle 3, and the device has positive significance for compact arrangement of the conveying system 3 of the interventional instrument.

Further, the operating handle 3 includes a supporting cylinder 31, an operating window 32 is provided on the supporting cylinder 31 and is opened along the axial direction of the pipe fitting 1, and the pipe fitting locking device 2 is slidably mounted in the supporting cylinder 31 and at least a part of the pipe fitting locking device is exposed to the operating window 32. The support barrel 31 can provide guidance for the movement of the pipe fitting locking devices 2, so that the pipe fitting 1 can be driven by conveniently and rapidly operating each pipe fitting locking device 2 by a user, and simultaneously, the unlocking buttons of the pipe fitting locking devices are conveniently exposed by the leaves, so that the implementation effect of interventional therapy is improved.

The actual way of locking the various tubes 1 may also be provided separately, as described hereinabove in relation to the different tubes 1. For example, referring to the drawings, the pipe fitting 1 can be matched with threads on the conveying system 3 of the interventional instrument to realize the axial movement of the pipe fitting 1 relative to the operation handle 3, and the pipe fitting locking device 2 can be operated to move after being locked by the pipe fitting locking device 2 so as to realize the movement of the pipe fitting 1, and different operation modes of the pipe fitting 1 are mainly used for adapting to different use requirements to meet different treatment effects.

The interventional instrument conveying system related to the application can be adapted to various interventional instruments, and in the embodiment disclosed by the application with reference to the accompanying figure 1d, the interventional instrument 4 is an artificial heart valve, and correspondingly, the interventional instrument conveying system related to the application can be applied to the field of artificial heart valve replacement conveying systems, artificial heart valve repair conveying systems, plugging device implantation and other interventional instruments.

Referring to fig. 2a to 6c, the present application discloses a tube locking device 2 for positioning a tube 1 in a medical instrument, comprising:

a housing 21;

The mutual distance of the clamping members 22 widens the pipe threading channel 23, thereby releasing the pipe 1; similarly, the clamping members 22 are close to each other to narrow the pipe threading channel 23, thereby clamping the pipe 1 for positioning. The clamping portion 221 is used as a component actually contacting the pipe fitting 1, and the clamping capability of the pipe fitting 1 is improved through shape matching, so that the clamping effect is improved, and a structural basis is provided for other functions. Movement of the clamp 22 may be accomplished by movement of the driver 24. The movement of the driving member 24 upon itself causes the driving ramp 241 to move relative to the clamping member 22, thereby effecting relative movement to the clamping member 22. Drive ramp 241 enables one or more of motion commutation, gear ratio shifting, and self-locking of the position of clamp 22.

According to the technical scheme disclosed by the application, the positioning and releasing of the pipe fitting 1 are realized through the matching of the driving piece 24 and the clamping piece 22, the structure is simple and stable, the operation experience can be effectively improved, and the convenience is improved.

Referring to fig. 3a to 3c, details of the arrangement of the driver 24 are disclosed. In one embodiment, the driving members 24 are disposed in pairs, and the moving direction of each driving member 24 is perpendicular to the axial direction of the pipe member 1, and the driving inclined surfaces 241 of the driving members 24 of the same pair are disposed opposite to each other to drive the clamping members 22 of the same pair.

The driving members 24 are arranged in pairs and drive a pair of clamping members 22 in a plurality of practical manners, for example, one pair of driving members 24 drives a single clamping member 22 and the clamping members 22 are in linkage with each other; or each driving member 24 drives the corresponding clamping member 22, and the driving members 24 are linked or independently triggered; and the like. The motion direction of the driving member 24 is perpendicular to the axial direction of the pipe fitting 1, so that the influence on the motion of the clamping member 22 can be avoided, in this embodiment, the driving inclined plane 241 at least plays a role of motion reversing, and can realize motion isolation to a predetermined extent while optimizing the internal layout of the housing 21, so that the state abrupt change in the motion process of the driving member 24 is avoided from influencing the motion state of the clamping member 22.

In the embodiment shown in fig. 5, each driving member 24 drives the corresponding clamping member 22, and in reference to an embodiment, the center line of the pipe threading channel 23 is taken as a reference line, the distance between the driving inclined surfaces 241 of the same pair at the reference line is taken as a fit gap 242, and during the movement of the driving member 24, the fit gap 242 is changed to drive the clamping members 22 of the same pair to move towards or away from each other, so as to clamp or release the pipe 1 correspondingly.

The variation in the fit gap 242 is in fact a variation in the maximum distance allowed between the pair of clamping members 22, the fit gap 242 being adjusted as the driving member 24 effects its movement by the driving ramp 241.

For a better understanding of the movement relationship of the driving member 24 and the respective components, referring to an embodiment, the extending direction of the center line of the pipe threading channel 23 is the X direction, the relative movement direction of the pair of clamping members 22 is the Y direction, the movement direction of the driving member 24 is the Z direction, and the X direction, the Y direction, and the Z direction spatially form a spatial coordinate system. Each direction constitutes a spatial coordinate system, which is understood to mean that two of the three directions constitute a plane, the remaining one direction being non-coplanar with the plane. For a better representation of the movement relationship of the structures, see the indications in fig. 2d and 5, further the X direction, the Y direction and the Z direction are perpendicular to each other.

Referring to the embodiment disclosed in fig. 3b, when viewed in the X-direction, the driving inclined surfaces 241 of the pair of driving members 24 are substantially V-shaped after extending and intersecting, and when the pair of driving members 24 move in the same direction, the width of the fit gap 242 changes corresponding to the extending trend of the first V-shape.

The driving inclined surfaces 241 of the driving members 24 of the same pair are mutually matched to form a first V shape, and in the process of relative movement of the driving members 24 and the pipe fitting 1, the axis of the pipe fitting 1 corresponds to different depths of the first V shape, so that different fit clearances 242 are obtained, and finally, the driving of the clamping members 22 is realized. Referring to the embodiment disclosed in fig. 3c, the driving inclined surface 241 of the same driving member 24 is formed in a second V shape opening toward the pipe threading channel 242, two auxiliary inclined surfaces 2411 are formed at both sides of the corner of the second V shape, and the clamping member 22 corresponding to the driving member 24 is located between the two auxiliary inclined surfaces 2411.

The drive ramp 241 on the same drive member 24 forms a second V-shape by its own two secondary ramps 2411, which function is to locate and self-lock the clamp member 22. It will be appreciated that when the clamping member 22 effects clamping of the tubular member 1, the tubular member 1 is forced to exert a force on the clamping member 22, resulting in a tendency of the clamping member 22 to move in the axial direction of the tubular member 1, which tends to affect the mating effect of the driving member 24 and the clamping member 22. The above problems can of course be overcome by appropriate component interactions, but with a consequent increase in component complexity and improvement in assembly accuracy. In this embodiment, the driving inclined surface 241 is formed in a second V-shape in the axial direction (i.e., the X-direction) of the pipe member 1 and two sub inclined surfaces 2411 are formed, and the corresponding clamping member 22 is located between the two sub inclined surfaces 2411 to achieve positioning.

As can be seen from the above, the driving ramp 241 is a compound ramp in three dimensions and has three slopes, i.e. a first slope driving the clamping members 22 of the same pair toward each other in the axial direction of the clamping members 22, and two second and third slopes holding the corresponding clamping members 22 in the middle of the driving ramp 241 in the axial direction of the pipe member 1. The second slope and the third slope constitute the two pair of slopes 2411 mentioned above.

In the transition form of the two auxiliary inclined planes, a smooth transition form can be adopted, so that stress concentration is reduced. Or can be seen in the drawings, the line contact between the two secondary bevels is achieved by a transition line. The mode of this setting can have better realization holder location on the driving piece, avoids because smooth transition leads to the location fuzzy to the condition that the holder appears slight displacement on the driving piece, and two kinds of different settings can be adjusted in a flexible way according to the different service conditions of product. The secondary ramps 2411 of the pair of drivers 24 cooperate to define a varying mating gap 242. The fit gap 242 becomes gradually larger and then becomes gradually smaller in the X direction, and the change trend corresponds to the extending trend of the second V shape.

The second V-shape mentioned above enables positioning and self-locking of the clamping member 22 and explains the principle of the positioning, and how self-locking is achieved will be explained below.

When the pipe fitting 1 is positioned by the clamping members 22, when the pipe fitting 1 receives the acting force to generate a movement trend, the clamping members 22 can generate a movement trend in the axial direction of the pipe fitting 1, so that the pipe fitting 1 moves on the auxiliary inclined surface 2411, the fit clearance 242 is changed under the condition that the positions of the driving members 24 are different, and the final effect is that the distance between the clamping members 22 has a smaller trend, the positioning effect of the pipe fitting 1 is further improved, the movement trend of the pipe fitting 1 is restrained, and negative feedback is formed. In the use effect of the final product, after the pipe fitting 1 is positioned, the stress of the pipe fitting 1 can lead to the reinforcement of the positioning effect, thereby ensuring the stability of positioning.

Further in combination with the shape of the gripping portion 221, the gripping member 22 can also have the effect of a single degree of freedom lock. The shape of the clamping portion 221 matches the critical shape, and in the product, the clamping portion 221 has a shape of a complementary circular arc to the outer circumference of the pipe member 1, so that the contact area with the pipe member 1 is small. When the pipe fitting 1 tends to move axially, the clamping portions 221 of the clamping members 22 of the same pair approach each other to increase the clamping moment to enhance the locking effect, so that the degree of freedom of the pipe fitting 1 in the axial direction is locked. However, when the pipe member 1 is subjected to a movement tendency of circumferential rotation, the distance between the clamping portions 221 of the pair of clamping members 22 does not change and the locking moment is small because the contact area between the clamping portions 221 and the pipe member 1 is small, so that the pipe member 1 can be driven to perform circumferential rotation with a small moment with the clamping members 22 positioned, and the above-mentioned effect of single-degree-of-freedom locking is achieved.

The effect of the locking of the movement effect of the clamping member 22 needs to be achieved by the driving member 24, and the driving inclined surface 241 and the clamping member 22 may be provided in various ways other than the above-mentioned several arrangements, but in principle, both should satisfy: the outer circumferential surface shape of the holder 22 is matched with the driving inclined surface 241 shape of the corresponding driver 24. From another perspective, in one embodiment, from the perspective of the X direction, the clamping member 22 is in line contact with the corresponding drive ramp 241.

The above-described working effect of the holder 22 needs to be achieved by the stable operation of the driving member 24. Referring to an embodiment, in the Z direction, the driving member 24 has a first movement direction that narrows the fit gap 242 and a second movement direction that widens the fit gap 242, and a retaining member 243 is provided between the driving member 24 and the housing 21 that drives the driving member 24 in the first movement direction.

The provision of the retaining member 243 ensures the stability of the position of the driving member 24 itself in the non-triggered condition, thereby improving the locking effect of the gripping member 22 on the pipe fitting 1. From the point of view of the movement of the driving member 24, the driving member 24 may be moved by a direct driving by a user, and in one embodiment, the driving member 24 may have a locking position for driving the gripping member 22 to position the pipe member 1 and a releasing position for allowing the pipe member 1 to move, and the driving member 24 includes:

a sliding block, i.e. a self body, movably mounted on the housing 21 along the Z direction, the sliding block facing the side wall of the pipe fitting threading channel 23 and simultaneously providing a driving inclined surface 241 and two auxiliary inclined surfaces 2411; an elastic member 243 acting between the slider and the housing 21 for holding the driving member 24 in the locked position;

an unlocking member 244 movably mounted on the housing 21 for driving the driving member 24 into the release position against the action of the retaining member 243.

The arrangement of the elastic member acting as the retaining member 243 can ensure the stability of the position of the driving member 24 in the case of no triggering, thereby improving the locking effect of the clamping member 22 on the pipe fitting 1, and the unlocking member 244 can improve the operation feel of the user, so as to facilitate the layout of the product structure. More importantly, the unlocking member 244 can facilitate the linkage of the driving member 24 or the clamping member 22.

In the mounting details of the retaining member 243, in reference to one embodiment, the retaining member 243 is an elastic member disposed between the driving member 24 and the housing 21, and the driving member 24 is provided with a positioning chamber 245 for receiving at least a portion of the elastic member.

The elastic member may be a deformable rubber, coil spring, or the like. The positioning chamber 245 serves to facilitate the assembly of the holder 243, to enhance the assembly of the holder 243 with the driving member 24 and to enhance the movement stroke of the driving member 24 in the case where the inner volume of the housing 21 is predetermined.

Further, each driving member 24 is provided with at least two elastic members, each elastic member being arranged in order in the axial direction of the pipe member 1. The arrangement in this embodiment achieves stabilization of the positions of the driving member 24 by the redundant arrangement of the holding members 243. Particularly, when the gripping member 22 moves in a movement direction due to the movement of the pipe member 1, the driving member 24 may be deviated in positioning, thereby affecting the positioning effect. When the holders 243 are arranged in this order in the axial direction of the pipe member 1, the above-described problems can be well overcome.

In the details of the arrangement of the unlocking member 244, referring to an embodiment, the unlocking member 244 is a slider slidably mounted on the housing 21, and a guide structure 246 is provided on a side surface of the slider to be engaged with the housing 21.

The slider mating guide structure 246 can simplify the mating relationship of the components while ensuring the stability of movement, facilitating assembly. The guide structure 246 may take the form of a guide slot or the like that engages with each other, and can provide a limit while guiding. Also, in one embodiment, the unlocking member 244 is provided with an anti-disengagement edge 247 for preventing itself from disengaging from the housing 21, and the housing 21 is provided with a release area 215 for avoiding the movement of the unlocking member 244.

The anti-drop edge 247 can further improve the limiting effect, improves the stability of unlatching 244 action.

The anti-slip edge 247 may be structurally compatible with other uses. For example, the unlocking member 244 may act as a limit against the housing 21 or the corresponding structure when moving away from the clamping member 22, or may act as a drive against the driving member 24 or the corresponding structure when the unlocking member 244 moves toward the clamping member 22, where the chamber in the housing 21 is required to satisfy a predetermined spatial relationship. In one embodiment, a drive chamber 217 is also provided in the housing 21 and communicates with the release area 215, the drive chamber 217 being configured to receive the drive member 24. The arrangement in this embodiment can effectively improve the utilization degree of the components, is convenient for spatial arrangement, is favorable to the holistic miniaturization of pipe fitting locking device 2, provides the structural foundation for whole high integration.

The above focuses on how the driving member 24 and the clamping member 22 cooperate to lock the tube 1 in the tube locking device 2, but in the field of medical apparatuses, the tube 1 is often provided with a plurality of tubes, and in reference to an embodiment, the tube 1 is provided with a plurality of tubes and is nested with each other, a pair of clamping members 22 and a pair of driving members 24 form a set of locking assemblies, and at least two sets of locking assemblies are included in the tube locking device 2, where each locking assembly locks a different tube 1.

The two sets of locking assemblies lock different tubes 1, enabling different operations to be performed on the tubes 1. The operation may be represented as the actuation of the pipe element 1 by releasing the locking assembly, as well as the positioning between the pipe element 1 and the pipe element locking device 2 by the locking assembly and the actuation of the pipe element 1 by actuating the pipe element locking device 2. The different use modes of the pipe fitting locking device provide rich choices for the setting modes of the medical equipment.

Referring to fig. 4a to 4c, details of the arrangement of the clamping member 22 are disclosed.

In reference to an embodiment, a positioning structure is provided in the housing 21, which cooperates with the clamping member 22, and the clamping member 22 is constrained in the positioning structure and is capable of moving within a predetermined range to effect clamping or releasing of the pipe fitting 1.

The operation of the clamping member 22 is closely related to the movement of the driving member 24, the driving member 24 having a first direction of movement that narrows the fit gap 242 and a second direction of movement that widens the fit gap 242 during movement of the driving member 24; the driving inclined surfaces 241 of the same pair of driving members 24 are mutually matched to form a first V shape, the driving inclined surfaces 241 on the same driving member 24 are of a second V shape with openings facing the pipe fitting penetrating channel 242, and the clamping member 22 is driven by the first V shape and the second V shape to clamp or release the pipe fitting 1.

The positioning structure allows movement of the clip 22 while the clip 22 is mounted, and may be structurally implemented using a deformable mount that deforms to release movement of the clip 22. It may also be implemented by using a clearance fit, and in reference to an embodiment, the positioning structure includes a positioning post (not shown) disposed in the housing 21, and the clamping member 22 is matched with the positioning post through a mounting hole 222 disposed on the clamping member, where the hole diameter of the mounting hole 222 is larger than the outer diameter of the positioning post.

The clearance fit mounting holes 222 and the locating posts provide multiple degrees of freedom for the clamp 22 while providing a stable assembly relationship, including but not limited to translation in multiple directions, rotation in multiple directions, and kinematic stacking of the two. The specific dimensional differences between the mounting hole 222 and the positioning post can be adjusted according to the desired travel of the clamp 22.

The clamping member 22 may be provided with a limit position protection structure in addition to the restraint of the positioning posts during movement. In reference to an embodiment, the positioning structure further includes a positioning baffle 213, and the positioning baffle 213 is disposed at the outer periphery of the clamping member 22 to restrict the extreme position of the clamping member 22.

The positioning baffle 213 can provide limit position constraint while not interfering with the movement of the clamp 22, preventing the constraint failure of the clamp 22 while reducing the mechanical requirements of the positioning column. Meanwhile, the positioning baffle 213 can also provide a relatively closed movement space for the clamping piece 22 under the condition of larger size, so that the foreign matters are prevented from affecting the movement effect of the clamping piece 22, and the response degree of the release and positioning of the pipe fitting 1 is ensured.

In terms of structure, the positioning baffle 213 is generally selectively connected to the inner wall of the housing 21 for stable installation, and thus the positioning baffle 213 can also serve as a fixing point for other components. In reference to an embodiment, at least two positioning baffles 213 are symmetrically arranged, each positioning baffle 213 is provided with a positioning hole 214 for the positioning column to pass through, and the pipe fitting 1 passes through the positioning baffles 213.

The arrangement in this embodiment not only facilitates the installation of the positioning column, but also provides a predetermined sealing effect for the tube threading channel 23, avoiding interference with the movement of the tube 1 when the plurality of components move relative to each other. From another perspective, the positioning baffle 213 surrounds the clamp 22 to form a pipe threading channel 23.

Thus in this embodiment, the predetermined range in the description above in which the clamp is constrained within the positioning structure and is able to move within the predetermined range is represented by the constraint of the positioning post and the positioning baffle. Referring to fig. 5 and 6a, in the Z direction, the predetermined range of the clamping member is represented as a gap between the two positioning baffle plates 213, and in the X and Y directions, the contracted range of the clamping member is represented as a fitting gap between the positioning post and the mounting hole 222.

In the specific form of the clamping member 22, referring to an embodiment, the clamping member 22 is columnar and concave in the middle in the axial direction to form the clamping portion 221.

The clamping piece 22 is of a columnar structure, so that the driving effect of the driving inclined plane 241 can be better adapted, and meanwhile, the columnar shape and the driving inclined plane 241 are axially extended to provide a larger contact area, so that the stability of the position of the clamping piece 22 is ensured. The clamping part 221 formed by the concave middle part can better position the pipe fitting 1 under the condition of matching the shape of the pipe fitting 1, so that the situation that the positioning is invalid due to the movement of the pipe fitting 1 is avoided.

The columnar shape of the clip 22 may be further optimized in a particular product. Referring to an embodiment, the clamping member 22 is cylindrical and is necked down at the middle in the axial direction to form the clamping portion 221.

The cylindrical structure can allow the cylindrical structure to rotate in the axial direction, provide a structural foundation for other functions, and simultaneously provide a larger peripheral area on the premise of determining the volume and meeting the function of clamping the pipe fitting 1, so as to achieve a better matching effect with the driving inclined plane 241. The clip 22 is dumbbell-shaped in overall form. Referring specifically to the drawings, the clamping member 22 is dumbbell-shaped with two enlarged ends, or dog-bone-shaped, and can be arranged in the manner shown in the drawings at the transition of the middle concave part and the two enlarged ends to prevent the pipe fitting from falling out of the concave clamping part; the device can also be set to be in smooth transition of circular arcs, so that damage to the pipe or surrounding parts in the moving process of the clamping piece is reduced; the pipe locking device can be flexibly arranged according to the material of the peripheral component and the setting parameters of the pipe locking device.

In a typical product design, the movement of the components will remain straight to facilitate internal layout, and thus the inter-fit of the components by drive ramps 241 may be affected. This problem can be overcome by adjusting the direction of movement of the drive member 24, but this in turn affects the compactness of the internal layout of the pipe locking device 2. In one embodiment, the radial dimension of one end of the clamping member 22 is slightly larger than the radial dimension of the other end and the peripheral generatrix of the two ends lie in the same plane which matches the driving ramp of the corresponding side.

The solution in this embodiment optimizes the peripheral shape of the clamping member 22 to give consideration to the contradiction that the above-mentioned seemingly irreconcilable, and meanwhile, the arrangement of unequal two ends can realize the movement trend of the clamping member 22 on the driving inclined plane 241, so as to improve the positioning effect on the pipe fitting 1.

As will be apparent from the above description, the positioning effect of the tubular member 1 depends on the actual mating effect between the gripping member 22, the driving member 24 and the tubular member 1, which, in addition to the dimensional parameters mentioned above, such as the mating gap, the tolerance, etc., also relates to the material arrangement of the components.

In one embodiment, the clamping member 22 is a metal member. The metallic material provides better structural strength, wear resistance, and likewise, the driver 22 is a metallic piece. In practical products, the housing 1 and the tube 1 are often provided in order to achieve a complex configuration: the housing 1 is a non-metallic piece. The same pipe fitting 1 is a nonmetallic piece. The pipe fitting 1 as a nonmetallic material can release the displacement of the clamping piece 22 by self deformation, thereby better realizing the clamping effect.

In terms of stability of the product in use, the fitting part of the pipe fitting 1 and the clamping piece 22 is provided with an antiwear structure. The abrasion-resistant structure has various manifestations such as providing an abrasion-resistant coating or a lubricating coating on the outer peripheral surface of the pipe member 1; for example, the pipe 1 increases the wall thickness at the corresponding position; for example, the pipe member 1 is provided with a sleeve or the like for engagement with the holder at a corresponding position.

In the product, the housing 21 needs to be processed into a complicated chamber, and also needs to secure strength while having a good product appearance, thus being costly. The structure function and the appearance function can be properly stripped, and the production and the assembly are convenient. In one embodiment, the housing 21 is further covered with a positioning sleeve 25, and the positioning sleeve 25 is provided with an operation opening 251, where the operation opening 251 is used for exposing the unlocking member 244 that causes the driving member 24 to act.

The positioning sleeve 25 provides a good appearance while also providing an operating port 251 for the unlocking member 244 or the driving member 24. The number of the operation ports 251 can be adjusted according to different settings of the pipe locking device 2. In reference to an embodiment, the pair of clamping members 22 and the pair of driving members 24 form a set of locking assemblies, at least two sets of locking assemblies are included in the pipe locking device 2, and at least two operation ports 251 are provided on the housing 21 and correspond to the driving members 24 of the locking assemblies respectively.

Different operation ports 251 can also be set differently. Referring to an embodiment in which the drive member 24 has a locked position in which the drive clamp member 22 locates the tubular member 1 and a released position in which the tubular member 1 is allowed to move, the drive member 24 further comprises:

an unlocking member 244 movably mounted on the housing 21 for driving the driving member 24 into the release position;

The operation port 251 is provided as follows:

the unlocking piece 244 protrudes out of the operation opening 251; or (b)

The operation port 251 is smaller in size than the unlocking member 244.

Different arrangements of the operation ports 251 can achieve different design purposes. For example, in the arrangement mode of the operation opening 251 at the lower part in fig. 2a, the unlocking member 244 protrudes out of the operation opening 251, so that a user can conveniently operate the unlocking member 244; for example, in the arrangement mode of the operation opening 251 in the upper part in fig. 2a, the size of the operation opening 251 is smaller than that of the unlocking member 244, so that misoperation of the unlocking member 244 by a user can be avoided, but when the unlocking member 244 is required in actual use, quick operation can be realized through a proper tool. The operator interface 251 thus provides a guide, limit, and also provides a structural basis for other functions.

In the overall form of the housing 21, in the reference embodiment, the positioning sleeve 25 is cylindrical and has two open ends. The positioning sleeves 25 with both ends open in the X direction facilitate the assembly of the housing 21, and facilitate the pipe fitting 1 to penetrate the housing 21 to perform the function of the pipe fitting locking device 2.

In the internal chamber distribution, in the reference embodiment, a pipe penetrating channel 23 is penetrated in the casing 21, positioning baffles 213 for installing the clamping piece 22 are arranged on the upper side and the lower side of the pipe penetrating channel 23, the left side and the right side of the pipe penetrating channel 23 are communicated with a driving cavity 217, and the driving cavity 217 is used for installing the driving piece 24.

The installation of a plurality of sets of locking assemblies in the housing 21 results in a complex movement relationship of the components, so that in reference to one embodiment, a spacer 218 is provided between the positioning baffle 213 and the housing 21 in the axial direction (i.e., X-direction) of the tube 1. Further, at least two sets of locking assemblies are provided in the housing 21, each of which is separated by a spacer 218.

In the embodiment shown in the drawings, the isolating plate 218 can provide isolation effect for different locking components besides the reinforcement effect mentioned above, ensure the compact layout of the pipe locking device 2 and ensure the stability of the movement of each component, and avoid the problem that the structural strength of the housing 21 is reduced due to the fact that too many cavities are formed on the housing 21.

Thus, referring to an embodiment, in the axial direction of the pipe member 1, a reinforcing rib 218 is provided between the positioning baffle 213 and the housing 21. In the embodiment shown in the drawings, the stiffening ribs 218, in addition to the stiffening effect mentioned above, also provide an isolating effect between the different locking assemblies, guaranteeing the stability of the movement of the various components while guaranteeing a compact layout of the pipe locking device 2.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application.

Claims

1. The conveying system of the interventional instrument comprises an operating handle and a plurality of pipe fittings movably arranged on the operating handle, and is characterized in that the pipe fittings are provided with a plurality of pipe fittings which are nested inside and outside in sequence, one of the two adjacent pipe fittings inside and outside is an inner pipe, the other pipe fitting is an outer pipe, and the conveying system also comprises a pipe fitting locking device; the pipe fitting locking device includes:

a housing mounted to the operating handle;

the clamping pieces are arranged in the shell in pairs and movably, a pipe fitting penetrating channel is arranged between the clamping pieces in the same pair, the clamping pieces are provided with clamping parts matched with the contour shape of the pipe fitting, the clamping pieces are cylindrical, the middle parts of the clamping pieces in the axial direction are concave inwards to form the clamping parts, the clamping pieces can rotate around the axis of the clamping pieces, and the clamping pieces are at least two pairs and are respectively used for positioning the inner pipe and the outer pipe;

2. The delivery system of an interventional instrument of claim 1, wherein a positioning post is disposed within the housing, and wherein the clamp has a mounting hole and is in rotational engagement with the positioning post through the mounting hole.

3. The delivery system of an interventional instrument of claim 1, wherein a housing in the tube locking device is fixed or slip fit relative to the operating handle.

4. The interventional instrument delivery system of claim 1, wherein at least three of the tubes are provided, at least two of the tube locking devices are provided, and any two adjacent tubes are positioned relative to each other by corresponding tube locking devices.

5. The delivery system of an interventional instrument of claim 4, wherein each tube locking device is arranged in sequence in an axial direction of the tube.

6. The delivery system of an interventional instrument of claim 1, wherein the operating handle comprises a support barrel having an operating window axially open along the tube, the tube locking device being slidably mounted within the support barrel and at least a portion of which is exposed to the operating window.

7. The delivery system of an interventional instrument of claim 1, wherein a centerline of a tube threading channel is used as a reference line and a spacing between drive ramps of a same pair at a reference line location is used as a mating gap that varies during movement of the drive members to drive the clamp members of the same pair to move toward or away from each other, thereby clamping or releasing the tube accordingly.

8. The delivery system of an interventional instrument of claim 7, wherein a centerline of the tube threading channel extends in an X-direction, a relative motion of the pair of clamping members in a Y-direction, a motion of the driving member in a Z-direction, and the X-direction, the Y-direction, and the Z-direction spatially form a spatial coordinate system;

9. The interventional instrument delivery system of claim 8, wherein the drive ramps on the same drive member are second V-shaped with openings facing the tube threading channel as viewed in the Z-direction, two secondary ramps are formed on both sides of the corner of the second V-shape, and the clamp member corresponding to the drive member is located between the two secondary ramps.

10. The delivery system of an interventional instrument of any one of claims 1-9, wherein the interventional instrument is an artificial heart valve.