CN215606613U - Interventional instrument conveying system convenient for switching modes - Google Patents

Abstract

The application discloses intervene apparatus conveying system convenient to switch mode includes by interior and many pipe fittings of outer coaxial setting, and the drive many pipe fitting relative motion's brake valve lever, each pipe fitting distal end are used for mutually supporting the operation and intervene the apparatus, and the proximal end of each pipe fitting is connected to brake valve lever, brake valve lever department still disposes the hydraulic drive return circuit of driving each pipe fitting relative motion, the hydraulic drive return circuit is including switching the switching valve that leads to more of liquid flow direction, the switching valve that leads to more includes: the valve comprises two valve seats which are oppositely arranged, a valve core which is sealed and buckled by the two valve seats and is rotatably installed, a wrench which is linked with the valve core through a one-way clutch mechanism and acts on the wrench and a wrench reset piece between the at least one valve seat. Aiming at the existing interventional device conveying system, the utility model further improves the driving mode, is more convenient to operate, and can combine auxiliary functions of exhausting and the like according to requirements.

Description

Interventional instrument conveying system convenient for switching modes

Technical Field

The present application relates to the field of medical devices, and in particular to delivery systems for delivering interventional devices into the body.

Background

The interventional device delivery system generally includes a control handle disposed at a proximal end, i.e., at an operator's side, a plurality of elongated tubes slidably nested inside and outside, a proximal end of each tube being a control end and connected to the control handle, a distal end of each tube being a working end and being interjectable in a body and cooperating with each other to complete delivery, release, or retrieval, etc. of the interventional device, and the control handle generally may be provided with a sliding or rotating member to drive relative axial movement between the tubes. Most of existing control handles are regulated and controlled in a mechanical mode, more requirements are provided for functions of an interventional instrument along with development of the interventional instrument, for example, functions of valve release, valve recovery, valve bending and the like of a conveying system are realized, different functional modules are usually realized by independent driving modules, transmission of the control handles is relatively complex, the whole size is large, and operation of an operation is not facilitated.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing interventional device conveying system, the utility model further improves the driving mode, is more convenient to operate, and can combine auxiliary functions of exhausting and the like according to requirements.

The application provides an intervene apparatus conveying system convenient to switch mode, include by interior and many pipe fittings of outer coaxial setting, and the drive many pipe fitting relative motion's brake valve handle, each pipe fitting distal end are used for mutually supporting the operation and intervene the apparatus, and the proximal end of each pipe fitting is connected to brake valve handle, brake valve handle department still disposes the hydraulic drive return circuit of driving each pipe fitting relative motion, the hydraulic drive return circuit is including switching the switching valve that leads to more of liquid flow direction, the switching valve that leads to more includes:

the hydraulic drive circuit comprises two valve seats which are oppositely arranged, wherein one valve seat is provided with a drive side interface which is accessed into the hydraulic drive circuit, and the other valve seat is provided with a working side interface which is accessed into the hydraulic drive circuit;

the valve core is sealed and buckled by the two valve seats and is rotatably installed, the valve core is provided with a communication hole, and the communication hole is used for communicating the corresponding driving side interface with the working side interface when the valve core rotates to different angles;

the wrench is linked with the valve core through a one-way clutch mechanism and is used for changing the rotating angle of the valve core;

a wrench reset member acting between the wrench and the at least one valve seat.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the control handle comprises a working part and a holding part connected with the working part, a cylinder barrel with a piston therein is arranged in the working part, the plurality of pipes penetrate through the cylinder barrel and are connected to the piston or fixed relative to the cylinder barrel, and the pipes are driven to move relative to each other in the cylinder barrel in a hydraulic manner;

the hydraulic drive circuit also comprises a drive pump which is communicated with the driving side interfaces and is used for driving liquid to flow.

Optionally, the drive pump includes:

a pump housing fixed in the control handle and connected into the hydraulic drive circuit;

a working element movably mounted in the pump housing for driving the flow of fluid;

the driving piece is movably arranged on the holding part and is linked with the work piece, and the driving piece is used as an operation part of the driving pump;

a return spring acting between the control handle and the drive member.

Optionally, the cylinder barrel includes a first cylinder barrel and a second cylinder barrel which are sequentially butted along the axial direction, wherein a first piston is slidably mounted in the first cylinder barrel, a second piston is slidably mounted in the second cylinder barrel, and the plurality of pipe fittings include a first pipe fitting, a middle pipe fitting and a second pipe fitting which are coaxially arranged from inside to outside;

all pipe fittings enter from the far end of the first cylinder barrel, wherein the first pipe fitting is fixed with the first piston, the middle pipe fitting extends out of the first piston and then enters the second cylinder barrel through the isolation sealing piece and is fixed with the second piston, and the first pipe fitting extends out of the second piston and then is fixed to the near end of the second cylinder barrel.

Optionally, one of the two valve seats is a first valve seat provided with the driving side port, and the other valve seat is a second valve seat provided with the working side port;

a liquid inlet hole communicated with the driving side interface is formed in one side, facing the valve core, of the first valve seat, and first liquid passing holes which correspond to the liquid inlet hole in position and are communicated with each other are formed in the first sealing gasket;

a liquid outlet hole communicated with the working side interface is formed in one side, facing the valve core, of the second valve seat, and second liquid passing holes which correspond to the liquid outlet hole in position and are communicated with each other are formed in the second sealing gasket;

when the valve core rotates to different angles, the communication hole on the valve core communicates the corresponding first liquid passing hole with the corresponding second liquid passing hole.

Optionally, the number of the liquid inlet holes is two, and each liquid inlet hole is located at a different radial position relative to the rotation axis of the valve core; the first liquid passing hole is matched with the corresponding liquid inlet hole in position;

the valve core is provided with an inner annular groove and an outer annular groove on one side facing the first valve seat, each annular groove is communicated with one of the liquid inlet holes, and the two communicating holes are respectively communicated with one of the annular grooves.

Optionally, the wrench includes an annular sleeve located at the periphery of the valve core, and a hooking portion fixed to the annular sleeve and extending to the outside of the control handle; the inner edge of the annular sleeve is linked with the outer periphery of the valve core through a one-way clutch mechanism which is matched with the inner edge of the annular sleeve;

the wrench reset piece is a coil spring extending around the axis of the valve core, one end of the coil spring is connected with the valve seat, and the other end of the coil spring is connected with the annular sleeve.

Optionally, the coil springs are two coils side by side, in the axial direction of the valve core, each coil spring is located on each of two sides of the annular sleeve, one end of each coil spring is provided with a positioning bend inserted into the corresponding side valve seat, the other ends of each coil spring are connected with each other to form a positioning cross rod, and the outer periphery of the annular sleeve is provided with a clamping groove for accommodating the positioning cross rod.

Optionally, each valve seat is provided with an insertion hole for inserting the positioning bend.

Optionally, the one-way clutch mechanism includes:

the ratchets are annularly distributed on the periphery of the valve core;

the elastic clamping jaws are fixed on the inner periphery of the annular sleeve;

the wrench has opposite forward and reverse directions relative to the rotation direction of the valve core, when the wrench rotates in the forward direction, the elastic clamping jaw is meshed with the ratchet to drive the valve core, when the wrench rotates in the reverse direction, the elastic clamping jaw deforms and slips off the ratchet, and the wrench resetting piece drives the wrench to rotate in the reverse direction;

in the axial direction of the valve core, the periphery of the valve core comprises three sections, the ratchets are fixedly distributed at the middle section, smooth sections are arranged at two sides of the middle section, and the two rings of coil springs are respectively sleeved on the smooth sections at the corresponding sides.

This application intervenes apparatus conveying system control handle department adopts each pipe fitting relative motion of hydraulic pressure mode drive, and convenient to use is swift, can also switch different functions through the switching valve that leads to more in the hydraulic drive return circuit.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an interventional instrument delivery system according to the present application;

FIG. 2a is a schematic view of a distal portion of the interventional instrument delivery system of the present application;

FIG. 2b is a schematic structural view of an interventional instrument used in an embodiment of the present application;

FIG. 2c is a schematic structural view of an interventional instrument used in another embodiment of the present application;

FIG. 2d is a schematic structural view of the loaded state of the interventional instrument;

FIG. 2e is a schematic structural view of the interventional instrument in a semi-released state;

FIG. 2f is a schematic structural view of the released state of the interventional instrument;

FIG. 3a is a schematic diagram illustrating the internal structure of an embodiment of the interventional device delivery system of the present application;

FIG. 3b is a schematic view of the insertion instrument delivery system of FIG. 3a with the removable cover and one of the housing halves removed;

FIG. 3c is a cross-sectional view of the insertion instrument delivery system of FIG. 3 a;

FIG. 3d is a schematic view of a cylinder portion of the interventional instrument delivery system;

FIG. 3e is an exploded view of the cylinder barrel and the rest of the components shown in FIG. 3 d;

FIG. 4 is an enlarged view of portion C of FIG. 3C;

FIG. 5 is an enlarged view of portion B of FIG. 3 c;

fig. 6a is an exploded view of a hub and distal seal plug in accordance with an embodiment of the present invention for an interventional instrument delivery system;

fig. 6b is a schematic view of the assembled structure of the fixing sleeve and the distal sealing plug in fig. 6 a;

FIG. 6c is a schematic view of the retainer sleeve of FIG. 6a at another angle;

FIG. 6d is a schematic structural view of the fitting portion of the fixing sleeve and the cylinder;

FIG. 7a is an exploded view of an isolation seal in an embodiment of the interventional instrument delivery system of the present application;

FIG. 7b is a schematic assembled structural view of the isolation seal of FIG. 7 a;

FIG. 7c is a schematic view of the isolation seal of FIG. 7b at another angle;

FIG. 7D is an enlarged view of portion D of FIG. 3 c;

FIG. 7e is a schematic view of the arrangement of the mating portions of the isolation seal and the two cylinders of FIG. 7 a;

FIG. 8a is a schematic view of the structure of the proximal end of the cylinder;

FIG. 8b is a schematic view of the assembled pipeline joint and proximal end sealing plug;

FIG. 8c is another angular configuration of the tube fitting of FIG. 8b assembled with the proximal seal plug;

FIG. 8d is an exploded view of the tube connector and proximal seal plug of FIG. 8 b;

FIG. 9a is a schematic view of a fluid reservoir in an embodiment of the interventional instrument delivery system of the present application;

FIG. 9b is an enlarged view of section E of FIG. 3 c;

FIG. 9c is an exploded view of the reservoir tank of FIG. 9 a;

FIG. 10 is an exploded view of a drive pump in an embodiment of the interventional instrument delivery system of the present application;

FIG. 11a is a schematic view of a multi-way switching valve in an embodiment of an interventional instrument delivery system of the present application;

FIG. 11b is a schematic view of a valve core of the multi-way switching valve of FIG. 11 a;

FIG. 12a is a schematic view of a multi-way switching valve in another embodiment of an interventional instrument delivery system of the present application;

FIG. 12b is a schematic view of the multi-way switching valve of FIG. 12a at another angle;

FIG. 12c is an exploded view of the multi-way switching valve of FIG. 12a (with the valve seat held in place);

FIG. 12d is an exploded view of the multi-way valve of FIG. 12a at another angle;

FIG. 12e is an exploded view of the multi-way valve of FIG. 12a at another angle;

FIG. 13a is a schematic illustration of the hydraulic operating principle in an embodiment of the present interventional instrument delivery system;

fig. 13b is an enlarged view of the portion of the gear position D1 in fig. 13 a.

The reference numerals in the figures are illustrated as follows:

1. a pipe fitting; 11. a first pipe member; 111. a guide head; 112. a mounting head; 113. a pipe joint; 1131. positioning a plate; 1132. A hook is clamped; 12. a second pipe member; 121. a loading section; 13. an intermediate pipe; 14. protecting the tube;

2. a control handle; 21. a working part; 211. a distal end; 212. a proximal end; 22. a holding portion; 23. a positioning member; 24. a first half shell; 25. a second half shell; 26. a positioning column; 28. an anti-drop blocking member;

3. a cylinder barrel; 31. a first cylinder; 311. a first hydraulic chamber; 312. a first chamber; 313. a second chamber; 314. a communication port; 315. a communication port; 32. a second cylinder; 321. a second hydraulic chamber; 322. a third chamber; 323. a fourth chamber; 324. A communication port; 325. a communication port; 33. a hydraulic line; 331. a first check valve; 332. a second one-way valve; 34. an isolation seal; 341. a barrel; 342. positioning a plate; 343. flanging; 344. reinforcing ribs; 345. buckling; 3451. a resilient arm; 3452. a hook is clamped; 3453. a guide slope; 3454. a chamfering structure; 346. a sealing plug; 3461. a convex ring; 35. a distal sealing plug; 351. a convex ring; 36. a proximal end sealing plug; 361. a convex ring;

4. a first piston; 41. a support frame; 42. sealing sleeves; 43. a through hole;

5. driving the pump; 51. a pump housing; 52. a working element; 53. a drive member; 531. a shaft hole; 54. an inlet; 55. an outlet; 56. A return spring; 57. a pump chamber;

6. a multi-way switching valve; 61. a valve seat; 61a, a first valve seat; 61b, a second valve seat; 611. a first sealing gasket; 6111. a first positioning tooth; 6112. a first liquid passing hole; 613. a liquid inlet hole; 614. a second positioning tooth; 615. a third positioning tooth; 616. a liquid outlet hole; 617. a second sealing gasket; 6171. a fourth positioning tooth; 6172. a second liquid passing hole; 618. capping; 619. a jack; 62. a valve core; 621. a rotating shaft; 622. a ratchet; 623. an annular groove; 624. a communicating hole; 625. a smooth section; 63. a wrench; 631. an annular sleeve; 632. an elastic claw; 633. a hooking part; 634. a card slot; 64. identifying; 65. an interface; 66. a flow channel; 67. a drive side interface; 68. a working side interface; 69. a wrench reset member; 691. positioning the cross bar; 692. positioning and bending;

7. a liquid storage tank; 71. a liquid injection port; 72. a spare joint; 73. an inlet; 74. an outlet; 75. a tank body; 75a, a first tank body; 75b, a second tank; 751. an interface platform; 752. a flange; 76. a gland; 761. an elastic hook; 77. a buffer bag; 771. Flanging; 772. an annular projection;

8. fixing a sleeve; 81. a through hole; 82. an exhaust hole; 83. positioning a groove; 84. flanging; 85. a blocking step; 86. positioning a plate; 861. reinforcing ribs; 87. buckling; 871. a resilient arm; 872. a hook is clamped; 873. a chamfering structure; 88. a thickened region;

9. a second piston;

10. a support; 101. and (5) connecting lugs.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

It should be noted that the terms "proximal" and "distal" are used relative to the operator. For example, in reference to a catheter or sheath, the term "proximal" refers to the end of the body distal to the lesion that is proximal to the operator, i.e., in use (e.g., the end of the catheter that is connected to the control handle), while the term "distal" refers to the end of the body distal to the operator, i.e., in use, proximal to the lesion (e.g., at the end of the catheter). 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 in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The delivery system may be used to treat heart valves (e.g., mitral valve, aortic valve, tricuspid valve, vena cava valve, pulmonary valve). The treatment may include, but is not limited to, valve replacement, valve repair, or other procedures that affect valve function. The systems and methods can use a catheter system that is delivered transcatheter, such as by a venous or femoral approach; or other minimally invasive surgical approaches including, but not limited to, trans-apical approach delivery catheters.

Referring to fig. 1, an interventional device delivery system according to an embodiment of the present application includes a catheter system, the catheter system includes a plurality of tubes 1 coaxially arranged from inside to outside, and a control handle 2 for driving the plurality of tubes 1 to move relatively, a distal end of each tube is used for operating an interventional device in cooperation with each other, a proximal end of each tube is connected to the control handle 2, and a hydraulic manner is adopted at the control handle 2 to drive the tubes to move relatively.

According to the hydraulic control system, the control handle is used for driving the pipe fittings in a hydraulic mode to realize the operation of the interventional instrument, such as releasing, cutting, rotating, grabbing or recovering and the like, the whole hydraulic system is configured at the near end, so that the on-site debugging or assembly is more convenient, the in-vitro solution is also convenient even if unexpected conditions occur, and if the hydraulic mechanism is configured at the far end, the harsh requirements on the volume and the safety of equipment are provided, and the adjustable movement form and direction are also limited due to the equipment problems.

The plurality of pipe fittings is understood to be at least two, specifically, any two pipe fittings are in sliding fit, that is, all parts between the two pipe fittings are provided with axial relative displacement during movement, and of course, if a deformable connecting piece is additionally arranged between the two pipe fittings, the relative movement relationship of the connecting piece is considered.

It is also possible to use a fixed connection (for example, a fixed connection at the distal end portion) locally between two tubes, for example, two tubes which are adjacent in the radial direction, and since the two tubes are fixed to each other only at the distal end portion, a small amount of relative displacement between the two tubes can be allowed at the proximal end portion, and of course, such a relative movement can be transmitted to the distal end portion to cause one of the two tubes to deform and bend, and the bending of the distal end of one tube can be achieved by using this feature.

The number of tubes 1 may be two, three or more, and the relative movement of the different tubes 1 may effect a corresponding manipulation of the interventional instrument, e.g. delivery, release, attitude adjustment, retrieval, etc., at the distal end (away from the operator, i.e. the end of the body closer to the lesion in use, and correspondingly the proximal end and vice versa), which may be carried out in accordance with conventional techniques in terms of the implementation of the functions of the respective tubes 1 themselves and the distal end, although improvements relating to the structure of the distal end of the tubes are also provided below. One of the key points of the application is that the operating handle is driven by liquid to drive the relative motion of different pipe fittings.

Referring to fig. 2a, in one embodiment, the plurality of pipe members includes a first pipe member 11, an intermediate pipe member 13 and a second pipe member 12 which are slidably nested from inside to outside, wherein:

the distal end of the first tube member 11 is used for placing an interventional instrument; the first tube member 11 and the interventional instrument can be separated from each other in vivo, that is, the interventional instrument is left in vivo, or can be connected with each other, and the interventional instrument is not left in vivo but is withdrawn to the outside of the body along with the first tube member 11 after the operation is completed.

The distal end of the second tube 12 carries a loading section for wrapping or releasing an interventional instrument. In other embodiments, the proximal outer portion of the second tube 12 may be further sleeved with a protective tube 14 fixedly connected to the control handle.

The distal end of the intermediate tube member 13 is provided with a locking member for restraining the interventional instrument to the first tube member 11; the axial sliding of the intermediate tube member 13 relative to the first tube member 11 allows the locking member to change its engagement with the mounting head on the first tube member 11;

in other embodiments, the distal end of the intermediate tube 13 may be fixedly connected to the first tube 11 for performing a pull bend to change the position of the interventional instrument for accurate positioning.

The connection between the distal ends of the intermediate tube member 13 and the first tube member 11 may be adjacent to the mounting head on the first tube member 11, for example, on the proximal side of the mounting head, although the distal end of the intermediate tube member 13 may be directly fixed to the mounting head.

At the distal most end of the first tube member 11 is a guide head 111, and adjacent to the proximal end of the guide head 111 is also fixed a mounting head 112, and when the interventional device is loaded, the interventional device is located between the guide head 111 and the mounting head 112 and is radially compressed, and the interventional device is generally provided with a coupling lug, and the outer wall of the mounting head is generally provided with a recess or a protrusion for cooperating with the coupling lug of the interventional device, and when the interventional device is loaded, the coupling lug is engaged with the recess of the mounting head 112 or hung on the protrusion to limit the axial position of the interventional device, and as for a further fixing manner of the coupling lug and the mounting head, reference may be made to WO2019080857a1 patent.

Referring to fig. 2b and 2C, the interventional device according to the present application is not limited in terms of the specific shape, and may include, for example, a stent 10 having a coupling lug 101 at one axial end of the stent 10, the coupling lug 101 may be a tip with an expansion head, or may have a ring-shaped or C-shaped coupling portion.

The stent 10 is a radially compressible or expandable structure, typically a mesh tubular structure formed by cutting or braiding.

Referring to fig. 2 d-2 f, the distal end of the second tube 12 is a loading section 121, the interventional device is radially compressed in the loading state, the loading section 121 is wrapped on the periphery of the interventional device to limit radial expansion of the interventional device, the interventional device is driven by the control handle to axially slide and retract relative to the first tube 11 after being in place, so that the interventional device is gradually exposed in the body vessel to allow the interventional device to radially expand, the interventional device enters a semi-release state from the expansion of the distal end, the interventional device is completely exposed along with the further retraction of the second tube 12, and finally, the connecting lug of the interventional device is separated from the mounting head to enter the release state, so that the release of the interventional device is completed. The relative axial sliding of the first tubular element 11 and the second tubular element 12 is driven by the control handle 2 during the whole process.

The first tube 11 and the second tube 12 are plastic tubes or metal tubes commonly used in the field of interventional devices, such as cut hypotubes or metal braided tubes and hypotubes hybrid tubes. The first pipe element 11 and/or the second pipe element 12 may also be a multilayer composite pipe.

Referring to fig. 3a to 3e, the shape of the control handle 2 is not limited strictly, and for the convenience of packaging other components, a split structure may be adopted, that is, the housing of the control handle 2 includes the first half-shell 24 and the second half-shell 25 that are fastened to each other, and may be divided into more parts for the convenience of local maintenance or operation.

In order to facilitate the mutual fixation between the first half-shell 24 and the second half-shell 25, various ways of fasteners and buckles can be adopted, in this embodiment, at least one of the first half-shell 24 and the second half-shell 25 is provided with a positioning column 26, the positioning column 26 is provided with a screw hole, the other one is correspondingly provided with a mounting hole for penetrating a bolt, and the two are fixed by the bolt;

or both the positioning columns are provided with positioning columns 26 and matched in position, the positioning column of one is provided with a positioning hole, and the positioning column of the other is directly clamped into the positioning hole corresponding to the position.

In other embodiments, the first and second half shells 24 and 25 may also be secured using a snap, adhesive, or weld.

In different embodiments, the hydraulic chamber is directly opened inside the control handle 2, or the control handle 2 is fixedly provided with the cylinder barrel 3, and the inside of the cylinder barrel 3 is the hydraulic chamber.

The cross section of the cylinder 3 is not critical, but preferably the outer periphery is defined by a smooth curve, such as a circle or an ellipse, taking the case where the cross section is circular, which is seen as a cylinder as a whole.

In order to protect the cylinder 3, the first and second half- shells 24, 25 enclose the cylinder 3 in a snap-fit manner, and in the preferred embodiment, a positioning part 23 is provided on the control handle 2, which cooperates with the cylinder 3. The positioning part 23 is one or more positioning steps, and the shape of the positioning steps corresponds to the outer contour of the cylinder 3 so as to clamp and fix the cylinder 3. Although the shape of the control handle 2 is not strictly limited, for convenience of operation, the control handle 2 includes a working portion 21 and a grip portion 22 connected to the working portion 21 in a preferred embodiment. The cylinder barrel 3 is located within the working portion 21, i.e. the working portion 21 as a whole serves to provide a hydraulic chamber, the working portion 21 having opposite distal 211 and proximal 212 ends.

The shape of the holding portion 22 is convenient for holding operation, for example, the holding portion has a length direction as a whole, and since the cylinder is installed in the working portion 21, the moving direction of the piston in the cylinder is the axial direction of the cylinder, the length direction of the holding portion 22 in this embodiment is substantially perpendicular to the axial direction of the cylinder, or slightly oblique. The working portion 21 and the holding portion 22 are L-shaped as a whole, and in order to further improve the hand-holding feeling and to conform to the hand-shape characteristics, the overall shape of the control handle 2 in this embodiment is similar to a pistol shape. Hydraulically actuated control elements, such as switches or the like, may be provided at the grip portion 22 for one-handed operation.

In other embodiments, the length of the grip 22 may be substantially parallel to the axial direction of the cylinder, or even aligned with each other. The overall shape of the control handle 2 is a bar.

Adopt integrated into one piece structure between work portion 21 and the portion of holding 22, or detachable connection to less volume is convenient for accomodate, and the mode such as buckle or screw thread can be adopted in the connection position of work portion 21 and the portion of holding 22 so that rapid Assembly.

In a preferred embodiment, the grip 22 is attached to the proximal end 212 of the working portion 21. And the tubes extend from the distal end 211 of the working portion 21 out of the control handle 2 and further distally.

In order to adopt hydraulic drive pipe fitting relative motion, the connected mode of pipe fitting and piston has further been improved in this application embodiment, directly penetrates the cylinder with the pipe fitting for the structure is further compact, improves the integrated level.

Of course, as a hydraulic driving method, the parts of the pipes entering and exiting the cylinder 3 need to be sealed, and according to the movement relationship of the pipes relative to the cylinder 3, fixed sealing or sliding sealing is correspondingly adopted.

The communication ports are provided in the cylinder 3, the hydraulic drive circuit is for driving the piston in the cylinder 3 to reciprocate, and the hydraulic drive circuit may be provided with necessary control devices such as a pump valve as needed, and in order to further improve the integration level, the hydraulic drive circuit is configured in the control handle 2 in one embodiment for driving the piston to move the pipes relatively. The interior of the first tube member 11 can be used for threading a guide wire or the like, so that the proximal end of the first tube member 11 is fixed to the control handle 2, and in one embodiment, the proximal end of the working portion 21 is mounted with a line connector 113, and the first tube member 11 extends and is connected to the line connector 113. The line joint 113 may specifically adopt a luer joint and is in butt communication with the first pipe 11, and may also introduce physiological saline into the first pipe 11 through the line joint 113 as needed to perform an air exhaust operation. The proximal end of the first pipe 11 can be directly fixed to the pipe joint 113, or can be connected to the pipe joint 113 through a fastening sleeve, and the fastening sleeve can be filled between the outer wall of the first pipe 11 and the inner wall of the pipe joint 113 to achieve fastening and sealing.

A first cylinder 31 and a second cylinder 32 are installed in the control handle 2, the two cylinders respectively provide a first hydraulic cavity 311 and a second hydraulic cavity 321, a first piston 4 is installed in the first hydraulic cavity 311 in a sliding mode, and a second piston 9 is installed in the second hydraulic cavity 321 in a sliding mode. The first cylinder 31 and the second cylinder 32 are coaxially arranged to be butted against each other, and a separation seal 34 is provided at the butted portion.

The proximal end of the second tube 12 penetrates into the first hydraulic cavity 311 and is fixedly connected with the first piston 4, the proximal end of the middle tube 13 extends out of the first piston 4 and then penetrates through the isolation sealing element 34 in a sliding sealing manner to enter the second hydraulic cavity 321, the middle tube 13 is fixed with the second piston 9 in the second hydraulic cavity 321, and the proximal end of the first tube 11 extends out of the second piston 9 and then is fixedly connected with the control handle 2. The first piston 4 divides the first hydraulic chamber 311 into a first chamber 312 and a second chamber 313, the second piston 9 divides the second hydraulic chamber 321 into a third chamber 322 and a fourth chamber 323, and the respective chambers are connected to the hydraulic drive circuit through respective communication ports.

The first chamber 312 and the second chamber 313 are divided by the first piston 4, and the third chamber 322 and the fourth chamber 323 are divided by the second piston 9, and since the positions of the two pistons are movable, the volumes of the chambers are changed accordingly and are not fixed.

When only the first piston 4 is moved distally, the second tube 12 is moved distally, while the first tube 11 and the intermediate tube 13 are not changed in position. The same applies when the first piston 4 is moved proximally.

When only the second piston 9 is moved distally, the intermediate tube 13 is brought to move distally, while the first tube 11 and the second tube 12 are not changed in position. The same applies when the second piston 9 is moved proximally.

The first cylinder 31 and the second cylinder 32 are coaxially arranged and are butted against each other through an isolating seal 34, a distal end sealing plug 35 is provided at a distal end of the first cylinder 31, and the first cylinder 31 is further provided with a communication port 314 and a communication port 315 provided on both sides of the first piston 4 for connecting a hydraulic drive circuit. The proximal end of the second cylinder 32 is provided with a proximal sealing plug 36 and the second cylinder 32 is further provided with a communication port 324 and a communication port 325 for connection to a hydraulic drive circuit, which are provided on both sides of the second piston 9.

The second tube member 12 is connected to the first piston 4 by a sliding sealed through distal end sealing plug 35, the intermediate tube member 13 and the first tube member 11 extend out of the first piston 4 inside the second tube member 12, the intermediate tube member 13 is further connected to the second piston 9 by a sliding sealed through isolation sealing 34, the first tube member 11 extends out of the second piston 9 inside the intermediate tube member 13, and further the sealing sealed through proximal end sealing plug 36 is fixedly connected to the line connector 113 of the control handle 2.

The pistons are respectively arranged in the hydraulic cavities, and the pistons can adopt the same structure as per se, only the positions and the penetrating pipe fittings are different, but the structural characteristics and the working principle of the pistons are not influenced.

Referring to fig. 4, in an embodiment, two pipes adjacent to each other in a radial direction include an outer pipe, that is, the second pipe 12, and an inner pipe, that is, the middle pipe 13, the first piston 4 includes a support frame 41, two ends of the support frame 41 in an axial direction are provided with flanges that are turned outwards, each flange is respectively and fixedly provided with a sealing sleeve 42, and the two sealing sleeves 42 respectively serve as: the fixed sealing part is sleeved on the second pipe fitting 12 and is in fixed sealing fit with the outer wall of the second pipe fitting 12;

the sliding sealing part is sleeved on the middle pipe fitting 13 and is in sliding sealing fit with the outer wall of the middle pipe fitting 13;

the supporting frame 41 and each sealing sleeve 42 have an axial through hole 43 for the pipe to pass through, and the sealing sleeve 42 may be made of elastic material such as rubber for sealing fit.

The fixed sealing part and the sliding sealing part are relatively fixedly connected through a support frame 41, and the peripheries of the fixed sealing part and the sliding sealing part are in sliding sealing fit with the inner wall of the first cylinder 31. The first piston 4 is fixedly connected to the second tube 12 and slidably engaged with the intermediate tube 13, so that the first piston 4 can move to drive the second tube 12 without affecting the position of the intermediate tube 13. The second piston 9 is similar, for example, in one embodiment, two pipes adjacent to each other in the radial direction include an outer pipe 13 and an inner pipe 11, the second piston 9 has a through hole extending along the axis, the proximal end of the middle pipe 13 is fixedly connected in the through hole, i.e., the second piston 9 is fixedly connected with the middle pipe 13 and is in sliding fit with the first pipe 11, so that the second piston 9 can drive the middle pipe 13 when moving, but does not affect the position of the first pipe 11. The proximal end of the first tube 11 passes through the second hydraulic chamber and is then fixedly connected to the line connector 113.

The radial gap between two adjacent pipe fittings in the radial direction is an exhaust gap, and each exhaust gap can be filled with physiological saline alone for exhaust and can also be communicated to a uniform hydraulic drive circuit to implement exhaust. The auxiliary function of hydraulic drive can be fully exerted, the air is exhausted in a liquid filling mode, and extra air exhausting equipment is omitted.

In order to establish a stable access channel, in one embodiment, the second tube 12 is further sleeved with a protective tube 14, and the proximal end of the protective tube 14 is fixed to the control handle 2.

The protection tube 14 is fixedly installed relative to the control handle and located on the periphery of the second tube 12, intervention is conducted through a channel established through the protection tube 14, blood vessels can be prevented from being scratched when the second tube 12 moves in a reciprocating mode, the length of the protection tube 14, namely the position of the far end of the protection tube 14, can be determined according to the length of an intervention path, the near end of the protection tube 14 is fixed to the far end side of the control handle 2, and the near end of the second tube 12 penetrates out of the protection tube 14 and then enters the first cylinder barrel.

To facilitate mounting of the proximal end of the protective tube 14, in one embodiment, a retaining sleeve 8 is mounted on the control handle, the proximal end of the protective tube 14 sealingly abuts the distal end of the retaining sleeve 8, and the proximal end of the second tube 12 extends through the protective tube 14 out of the retaining sleeve 8 and further into the first hydraulic chamber.

Since the protective tube 14 and the second tube 12 need to slide relatively, a radial gap is sometimes reserved, and the radial gap needs to be exhausted during the operation.

With reference to fig. 5 to 6d and fig. 3a to 3e, in an embodiment, an interventional device delivery system is provided, which includes a plurality of pipes coaxially disposed from inside to outside, and a control handle 2 for driving the plurality of pipes to move relatively, distal ends of the pipes are used for cooperating with each other to operate an interventional device, proximal ends of the pipes are connected to the control handle 2, a cylinder 3 with a piston therein is disposed at the control handle 2, a distal end of the cylinder 3 is hermetically abutted to a fixing sleeve 8, the plurality of pipes penetrate into the cylinder 3 through the fixing sleeve 8 and are connected to the piston or fixed relative to the cylinder 3, and the piston is driven by a hydraulic method in the cylinder 3 to move the pipes relatively;

the outermost periphery of the plurality of pipe fittings is sleeved with a protection pipe 14, the near end of the protection pipe 14 is connected with the fixing sleeve 8, the radial gap between the outermost pipe fitting of the plurality of pipe fittings and the protection pipe 14 is an exhaust gap, and the side wall of the fixing sleeve 8 is provided with an exhaust hole 82 communicated with the exhaust gap.

The above embodiments can be combined, for example, the cylinder 3 includes a first cylinder 31 and a second cylinder 32 which are butted in sequence from the far end to the near end, wherein the first piston 4 is slidably mounted in the first cylinder 31, the second piston 9 is slidably mounted in the second cylinder 32, the plurality of pipe members include a first pipe member 11, an intermediate pipe member 13 and a second pipe member 12 which are coaxially arranged from inside to outside;

all the pipe fittings enter from the far end of the first cylinder 31, wherein the first pipe fitting 11 is fixed with the first piston 4, the middle pipe fitting 13 extends out of the first piston 4, enters the second cylinder 32 and is fixed with the second piston 9, and the first pipe fitting 11 extends out of the second piston 9 and is fixed to the near end of the second cylinder 32.

The fixing sleeve 8 is provided with a through hole 81, the near end of the protection tube 14 extends into the through hole 81 and is fixedly connected with the hole wall in a sealing mode in a bonding mode, a welding mode, an interference fit mode and the like, the fixing sleeve 8 and the control handle 2 can be fixed in a clamping mode or a fastening mode through a fastening piece and the like, in one embodiment, the periphery of the fixing sleeve 8 is provided with an annular positioning groove 83, the control handle 2 is provided with two half shells which are buckled with each other, and the edges of the two half shells are clamped with the positioning groove 83. It can be seen for example that a corresponding portion of the first half-shell 24 snaps into the detent 83 to limit the axial position of the retaining sleeve 8.

Since the second tube 12 needs to slide back and forth, the proximal end of the sheath 8 is in sliding sealing engagement with the outer wall of the second tube 12, wherein the sliding sealing engagement can be either a direct contact engagement of the inner wall of the through hole 81 with the outer wall of the second tube 12 or an indirect engagement via other means.

The protection tube 14 is fixedly inserted into one axial end of the fixing sleeve 8, the other axial end of the fixing sleeve 8 is a connecting end, the connecting end is inserted into the far end of the first cylinder 31 and fixed with the first cylinder 31 through a buckle 87, and the periphery of the connecting end is sleeved with a far end sealing plug 35 matched with the inner wall of the first cylinder 31;

the distal end sealing plug 35 is provided with an avoidance hole, and the outermost pipe fitting of the plurality of pipe fittings, namely the second pipe fitting 12, is in sliding sealing fit with the avoidance hole.

In order to ensure the connection and to facilitate assembly, the connection end is provided with a flange 84 in one embodiment, and the distal sealing plug 35 is sleeved on the flange 84. The distal end sealing plug 35 is made of elastic materials such as rubber, and therefore installation is convenient, and a sealing effect can be guaranteed.

In order to make the axial relative position between the protective tube 14 and the fixation sleeve 8 fit precisely, in an embodiment the inner wall of the fixation sleeve 8 is provided with a stop step 85, against which stop step 85 the proximal end face of the protective tube 14 abuts.

For a correct assembly between the fixing sleeve 8 and the first cylinder 31, while the fixing sleeve is fixed to the first cylinder 31 by the snap 87, in an embodiment, the outer wall of the fixing sleeve 8 is provided with a positioning disc 86, and the distal end face of the first cylinder 31 abuts against the positioning disc 86.

One side of positioning disk 86 in towards first cylinder 31 has strengthening rib 861, and strengthening rib 861 both can stabilize positioning disk 86, and after getting into first cylinder 31, can also offset with first cylinder 31 inner wall, prevent that fixed cover 8 from radially rocking. In the circumferential direction of the fixing sleeve 8, the reinforcing ribs 861 and the catches 87 may be alternately arranged, for example, two reinforcing ribs 861 and two catches 87 are provided, respectively, and are uniformly arranged alternately in the circumferential direction.

The latch 87 and the first cylinder 31 are axially inserted to prevent the latch 87 from being accidentally released, but in order to facilitate the assembly of the latch 87 in place, in an embodiment, a positioning hole is formed in a sidewall of the first cylinder 31, and the latch 87 includes an elastic arm 871 extending from the positioning plate 86 into the first cylinder 31, and a hook 872 located at an end of the elastic arm 871 and engaging with the positioning hole.

At least two buckles 87 are distributed along the circumferential direction of the fixing sleeve 8, the interval is preferably uniform, the tail ends of the hooks 872 in the axial direction are slightly provided with chamfers, when the buckles are inserted into the first cylinder 31, the elastic arms 871 can be guided to deform to allow each buckle 87 to enter the first cylinder 31 until the hooks 872 are positioned in the positioning holes, and at the moment, the elastic arms 871 reset to lock the fixing sleeve 8 on the first cylinder 31.

Usually, when disassembling, it is necessary to push each buckle radially inwards with the help of a tool to make the hook 872 come out of the positioning hole and then pull out axially, but the operation is too cumbersome and requires the help of a tool, in a preferred embodiment, one side of the circumferential direction of the hook 872 has a chamfer structure 873 for guiding the hook 872 to unscrew out of the positioning hole along the circumferential direction.

When the fixing sleeve 8 and the first cylinder 31 need to be disassembled, the chamfering structure 873 rotates relative to the fixing sleeve 8 and the first cylinder 31, the hook 872 is extruded out of the positioning hole radially inwards under the action of the inner edge of the positioning hole, then the fixing sleeve 8 is pulled out axially, the operation is simpler, and a special tool is not needed.

In order to maintain the structural strength of the periphery of the vent 82, in one embodiment, the sidewall of the pouch 8 has a thickened area 88, and the vent 82 opens into the thickened area 88.

In the axial direction, the venting gap between the protective tube 14 and the first tubular part 11 is open on the proximal end side of the protective tube 14, so that the venting hole 82 is located between the stop step 85 and the positioning disk 86.

The exhaust hole 82 can be connected with a pipeline independently for exhausting air, in order to fully utilize the existing hydraulic drive circuit, the exhaust hole 82 can be connected with the hydraulic drive circuit, for example, one working side interface of the multi-way switching valve is communicated with the exhaust hole 82, the multi-way switching valve is provided with a plurality of gears, one gear is communicated with the outlet of the drive pump and the exhaust hole 82, and the exhaust can be carried out in a liquid filling mode.

Referring to fig. 7a to 7e, with reference to fig. 3a to 3e, the present embodiment provides an interventional device delivery system, including a plurality of pipe fittings 1 coaxially disposed from inside to outside, and a control handle 2 for driving the plurality of pipe fittings 1 to move relatively, distal ends of the pipe fittings are used for operating the interventional device in cooperation with each other, proximal ends of the pipe fittings are connected to the control handle 2, a cylinder 3 with a piston therein is disposed at the control handle 2, the plurality of pipe fittings 1 penetrate through the cylinder 3 and are connected to the piston or fixed relative to the cylinder 3, and the cylinder 3 drives the pipe fittings to move relatively by a hydraulic method;

the cylinder 3 comprises a plurality of cylinders which are sequentially butted along the axial direction, two adjacent cylinders are connected through an isolation sealing part 34, one of the pipe fittings penetrates through the isolation sealing part 34 in a sliding sealing mode, and the isolation sealing part 34 is detachably connected with the two adjacent cylinders in a buckling mode 345.

The hydraulic mode drives the pipe fittings to move relatively, the cylinder barrel with the piston can be utilized, a hydraulic pipeline is correspondingly configured, the embodiment can be combined with the embodiments, the embodiment is improved for connection of a plurality of cylinder barrels, two ends of the isolation sealing element 34 are respectively matched with the cylinder barrels in a sealing mode, and meanwhile the isolation sealing element is positioned in the axial direction and the circumferential direction of the cylinder barrels through buckles so as to be convenient for quick assembly and disassembly.

In one embodiment, the cylinder barrel comprises a first cylinder barrel 31 and a second cylinder barrel 32 which are sequentially butted along the axial direction, wherein a first piston 4 is arranged in the first cylinder barrel 31 in a sliding way, a second piston 9 is arranged in the second cylinder barrel 32 in a sliding way, and the pipe fittings comprise a first pipe fitting 11, an intermediate pipe fitting 13 and a second pipe fitting 12 which are coaxially arranged from inside to outside;

all the pipe fittings enter from the far end of the first cylinder 31, wherein the first pipe fitting 11 is fixed with the first piston 4, the middle pipe fitting 13 extends out of the first piston 4, enters the second cylinder 32 through the isolation sealing part 34 and is fixed with the second piston 9, and the first pipe fitting 11 extends out of the second piston 9 and is fixed to the near end of the second cylinder 32.

In one embodiment, the isolation seal 34 includes:

the cylinder 341, the cylinder 341 has an axial direction, and both axial ends of the cylinder 341 are respectively placed into the cylinders on the corresponding sides;

the two sealing plugs 346 are respectively fixed at one axial end of the cylinder body and are respectively in sealing fit with the inner wall of the cylinder barrel at the corresponding side, and each sealing plug 346 is respectively provided with an avoidance hole for a pipe fitting to pass through;

two sets of fasteners 345, the two sets of fasteners 345 are respectively fixed at one axial end of the cylinder 341 and are respectively engaged with the corresponding cylinder.

The distal and proximal ends of the isolation seal 34 are symmetrically configured, i.e., connected to the cylinders using the same structural features, so that the following description will be given primarily on a single side, with the same principle on the other side.

The sealing plug 346 is made of elastic material such as rubber, etc. to facilitate sealing, in order to facilitate installation of the sealing plug 346, two axial ends of the cylinder 341 are respectively provided with outward flanges 343, and each sealing plug 346 is respectively fixedly sleeved on the corresponding outward flange 343. At least two axially spaced rings 3461 are provided around the outer circumference of the sealing plug 346, and each ring 3461 is in sealing engagement with the inner wall of the corresponding cylinder. Each of the convex rings 3461 can form an independent seal, further ensuring the sealing effect.

In order to keep the relative position stable, in an embodiment, the outer periphery of the cylinder 341 is provided with a positioning disc 342, and the end surfaces of two adjacent cylinders respectively abut against two opposite sides of the positioning disc 342.

It can be seen that the first cylinder 31 abuts the distal side of the positioning plate 342, the second cylinder 32 abuts the proximal side of the positioning plate 342, and the positioning plate 342 on the one hand supports and positions the cylinders and on the other hand also makes the structure between the two cylinders more compact.

Since the positioning plate 342 has a limited thickness, in order to ensure structural strength, in one embodiment, reinforcing ribs 344 are respectively disposed between the outer circumference of the cylinder 341 and opposite sides of the positioning plate 342. The reinforcing ribs 344 prevent the positioning plate 342 from being deformed in the axial direction, thereby improving the overall rigidity of the positioning plate 342.

In the preferred embodiment, the outer edge of the rib 344 abuts the inner wall of the cylinder in the radial direction of the cylinder 341. By the support of the ribs 344, the two cylinders can be further stabilized in the radial direction.

The ribs 344 and the catches 345 may be alternately arranged, for example, two ribs 344 and two catches 345 are arranged on the same side of the positioning plate 342 and are circumferentially and uniformly arranged alternately.

The snap fasteners 345 are axially inserted into the cylinders to prevent the cylinders from being accidentally loosened, and in order to facilitate assembly, i.e., the snap fasteners 345 are positioned in place, in an embodiment, the cylinder walls of the cylinders are provided with positioning holes, two sets of the snap fasteners are fixed on two opposite sides of the positioning plate 342, each of the snap fasteners includes an elastic arm 3451 extending from the positioning plate 342 into the cylinder, and a snap hook 3452 located at the end of the elastic arm 3451 and engaged with the positioning hole.

The end of the hook 3452 has a guiding inclined surface 3453 for guiding itself into the positioning hole along the axial direction of the cylinder. When inserted into the cylinder, the resilient arms 3451 are guided to deform to allow each of the latches 345 to enter the corresponding cylinder until the latches 3452 are positioned in the positioning holes, at which time the resilient arms 3451 are reset to lock the isolation seal 34 to the associated cylinder.

Usually, during the disassembly, the hooks 3452 are pushed radially inward by a tool to be disengaged from the positioning holes and then pulled axially, but the operation is too complicated, and in a preferred embodiment, a chamfer structure 3454 is formed on one circumferential side of the hook 3452 for guiding the hook 3452 to rotate circumferentially out of the positioning hole.

When the isolating seal member 34 and the cylinder barrel need to be disassembled, the isolating seal member 34 and the cylinder barrel are relatively rotated, the chamfer structure 3454 extrudes the clamping hook 3452 radially inwards to be separated from the locating hole under the action of the inner edge of the locating hole, and then the isolating seal member 34 and the cylinder barrel are axially pulled and separated, so that the operation is simpler and a special tool is not needed.

Referring to fig. 8a to 8d, in an embodiment, a pipeline joint 113 is provided, for example, a positioning hole is formed on a proximal cylinder wall of the second cylinder 32, a positioning plate 1131 is disposed on an outer circumference of the pipeline joint 113, an end surface of the second cylinder 32 abuts against the positioning plate 1131, a hook 1132 extending into the second cylinder 32 and engaged with the positioning hole is further disposed on the positioning plate 1131, and a circumferential side of the hook 1132 has a chamfer structure for guiding the hook 1132 to enter and exit the positioning hole of the second cylinder 32.

The distal end of the pipe joint 113 has an outward flange, the proximal end sealing plug 36 is sleeved on the outward flange, and the periphery of the proximal end sealing plug 36 has two convex rings 361, and is in sealing fit with the inner wall of the second cylinder 32 through the two convex rings 361.

The proximal end of the line connector 113 is threaded or otherwise snap-fit to facilitate connection to an external line, and the distal end of the line connector 113 is secured relative to the first tubular member 11 and communicates with one another.

The proximal sealing plug 36 has an avoiding hole, and the proximal end of the first tube member 11 can be inserted into and fixed to the avoiding hole, or further extended and fixed to the inner wall of the pipe joint 113.

Referring to fig. 3a to 3e, in an embodiment of the present application, in order to further improve the integration, a hydraulic driving circuit for driving the pipes to move relatively through the piston is further configured at the control handle 2. The hydraulic driving circuits are all arranged on the control handle 2, so that redundant external pipelines can be avoided, and component interference during handheld moving operation is reduced.

In one embodiment, the hydraulic drive circuit includes:

the hydraulic pipeline is used for providing a liquid channel communicated with each hydraulic cavity;

the driving pump 5 is communicated with the hydraulic pipeline and used for driving liquid to flow;

and the control valve is communicated with the hydraulic pipeline and used for controlling the flow direction of the liquid.

The hydraulic line generally refers to a pipe for communicating each component in the hydraulic drive circuit, and since the hydraulic drive circuit is disposed in the control handle 2, it is preferable that all or most of the hydraulic lines are housed in the control handle 2, and the hydraulic line is omitted in each drawing related to the specific structure in the present application, and since the communication relationship among the components has been clearly described, the hydraulic line can be disposed as needed in the implementation process, and since the hydraulic line generally employs a hose, how to house the hydraulic line in the control handle 2 can be implemented as needed.

When the hydraulic pipeline is used, liquid is filled, the flow direction of the liquid is changed to push the piston to reciprocate, and in order to improve safety, the liquid in the hydraulic driving loop is normal saline.

Corresponding control valves are arranged in the hydraulic drive circuit, which control the flow direction of the liquid, change the movement direction of the piston or realize other auxiliary functions, for example, the control valves may comprise one-way valves respectively arranged at the inlet and outlet of the drive pump 5 and a multi-way switching valve 6 for switching the movement direction of the piston.

Referring to fig. 9a to 9c, in order to buffer and temporarily store the liquid, in one embodiment, the hydraulic driving circuit further includes a liquid storage tank 7 communicated with the hydraulic pipeline for temporarily storing the liquid, the liquid storage tank 7 may also be integrally installed inside the control handle 2, and the liquid storage tank 7 is provided with a liquid injection port 71 for injecting the liquid in advance or on site during use.

The liquid storage tank 7 not only has an inlet and an outlet communicated with the hydraulic pipeline, but also can be provided with a liquid injection port 71 independently, the liquid injection port 71 can be provided with a valve independently for connecting with external liquid injection equipment, and in addition, in a preferred embodiment, the liquid injection can be realized by utilizing the driving pump 5.

With reference to fig. 3a to 3e, in one embodiment, an interventional device delivery system is provided, which includes a plurality of tubes 1 coaxially arranged from inside to outside, and a control handle 2 for driving the tubes 1 to move relatively, a distal end of each tube is used for operating an interventional device in cooperation with each other, a proximal end of each tube is connected to the control handle 2, and a hydraulic driving circuit for driving the tubes to move relatively is further configured at the control handle 2;

at least a reservoir 7 is included in the hydraulic drive circuit, the reservoir 7 comprising:

a tank 75 with a tank opening and an inlet 73 and an outlet 74 in communication with the hydraulic drive circuit;

the buffer bag 77 is arranged in the tank body 75 and is in sealing fit with the tank opening;

and a pressing cover 76 which is engaged with the tank 75 and clamps and fixes the buffer bag 77 with the tank opening.

The reservoir 7 may be configured in the hydraulic drive circuit to store fluid and to act as a buffer for sudden changes in fluid pressure, wherein the tank 75 is connected to the inlet side of the drive pump 5 in the hydraulic drive circuit, and pressure may be released by deformation of the buffer bladder 77 when the volume of fluid within the tank 75 changes.

In order to facilitate the supply of body fluid from the outside, in one embodiment, the tank 75 is a bottom wall on the side away from the tank opening, the bottom wall is opened with a liquid filling opening 71, and a pipe joint is mounted on the liquid filling opening 71.

The pipe joint may have a connection structure such as a screw thread to facilitate disassembly and assembly, in which the tank 75 is installed inside the control handle 2 and only the pipe joint is exposed to the control handle 2. To avoid interfering with the deformation of the buffer bladder 77, the inlet 73 and the outlet 74 of the tank 75 are both adjacent to the bottom wall.

The tank 75 includes a first tank 75a and a second tank 75b communicating with each other, and a buffer bag 77 is provided in the first tank 75 a.

The first tank 75a has a larger volume than the second tank 75b, the top of the first tank 75a has a mouth, and the bottom of the first tank 75a converges in shape and transitions to the second tank 75 b.

The larger volume of the first tank 75a facilitates the configuration of the buffer bag 77 with a corresponding volume, so as to improve the buffer adaptability, the shape of the bottom of the first tank 75a is converged to form a step structure, the bottom of the buffer bag 77 can be offset with the step structure when the first tank is expanded to the maximum volume, so that the effect of assisting the phase is achieved, and the space of the second tank 75b is prevented from being excessively occupied.

The buffer bag 77 is made of an elastic material, and changes the internal volume of the can body 75 by self-deformation. In a preferred embodiment, the wall of the cushion bladder 77 has a bellows structure that can be elastically deformed. The tendency of the volume of cushioning bladder 77 to change is directed by the stretching or compressing of the bellows structure, which further increases the magnitude of the volume change.

In order to avoid the obstruction of the increase of the internal pressure of the cushion bladder 77 when the volume of the cushion bladder 77 is reduced, in an embodiment, the cushion bladder 77 has an open structure on the side facing the opening, and the opening portion has a flange 771, and the flange 771 is clamped and fixed by the gland 76 and the opening. When the volume of the buffer bag 77 is reduced, the internal air can be discharged from the opening portion, so that the bellows structure is folded flat.

In an embodiment, to ensure the sealing effect, the out-turned lip 771 is provided with an annular projection 772 against the gland 76. The annular protrusion 772 may be regarded as a thickened area having a larger deformation range, and when the gland 76 is abutted against the annular protrusion 772, the deformation of the annular protrusion 772 can compensate for local shape defects or machining errors, thereby ensuring the sealing performance. Of course, the corresponding portion of the gland 76 may be slotted to accommodate the annular projection 772 for easier assembly and positioning, with the depth of the slot being slightly less than that of the annular projection 772.

The buffer bag 77 and the tank 75 have enclosed a closed space for storing liquid, so the gland 76 mainly functions to fix the buffer bag 77, and in one embodiment, the gland 76 includes:

an annular frame for clamping and fixing the buffer bag 77 with the tank opening;

an elastic hook 761 extending from the annular frame to one side of the can 75 and matching with the can 75.

In order to match with the annular frame, the tank mouth is turned outwards to form an interface platform 751, the annular frame and the top surface of the interface platform 751 clamp the fixed buffer bag 77, and the elastic hook 761 is abutted against the bottom surface of the interface platform.

The ring frame is shaped to substantially match the shape of the interface platform 751, the resilient hooks 761 are arranged in pairs to maintain a uniform force, the resilient hooks 761 have guide ramps that interact with the interface platform 751 to facilitate seating during installation, and a flange 752 is disposed around the top surface of the interface platform 751 to abut the cushion bladder 77 to ensure a seal.

Referring to fig. 10, in one embodiment, the drive pump 5 includes:

a pump housing 51 fixed to the control handle and connected to the hydraulic drive circuit;

a working element 52 movably mounted in the pump housing 51 for driving the flow of the fluid;

a driving member 53 movably installed at the control handle and linked with the working member 52;

a return spring 56 acting between the control handle and the driver 53.

The pump housing 51 is provided with an inlet 54 and an outlet 55 communicating with the pump chamber 57, and the inlet 54 and the outlet 55 are connected to the hydraulic drive circuit, and the pump housing 51 is provided with a pump chamber 57.

The control handle may also be fitted with a backup fitting 72 for temporary transfer of fluid or replacement for other components.

The working element 52 reciprocates linearly or circularly within the pump housing 51 to drive fluid flow, and may take the form of an impeller or plunger in a conventional manner. In one embodiment, the working element 52 is a plunger against which the driving element 53 directly presses or is linked to the plunger via a transmission mechanism.

The driving member 53 is an electric, pneumatic or manual member, the driving member 53 is used to drive the working member 52 to move, the driving member 53 and the working member 52 can be linked in a structure or in a split manner, and according to the form of the power source, it is preferable to use a manual work piece, i.e. to drive the working member 52 by manual operation, but the basic function can be realized by electric or pneumatic operation.

In one embodiment, the hand piece is an operating knob slidably or rotatably mounted to the control handle.

In one embodiment, the driving member 53 has a shaft hole 531 and is mounted on a control handle through a shaft, the control handle includes a working portion for providing a hydraulic chamber and a holding portion 22 connected to the working portion, and the operation knob is mounted on the holding portion 22. So that the pump 5 can be operated with one hand while being held.

In an embodiment, the drive pump 5 further comprises a reset element acting between the operating knob and the control handle. The driving member 53 and the working element 52 can be matched against each other, and can also be connected through a limiting structure or a traction member, so that the driving member 53 drives the working element 52 to reciprocate at the moment of resetting. A restoring element, for example a compression spring or a tension spring, which interacts with the drive element 53, or a coil spring, for example a restoring spring 56, which is mounted in the region of the pivot, can be arranged between the drive element 53 and the control handle, and can also act directly on the work element 52, for example a compression spring, which is located in the pump chamber 57 and directly abuts against the work element 52, in order to move the work element 52 back and forth. In use, the drive member 53 is repeatedly depressed, which in turn drives the working element 52 to cause fluid flow in the hydraulic drive circuit.

Referring to fig. 11a to 11b and fig. 12a to 12d, in an embodiment, the control valve is a multi-way switching valve 6, the multi-way switching valve 6 has a driving side port 67 communicating with the inlet and outlet of the driving pump 5, and a plurality of working side ports 68, wherein each two working side ports communicate with one of the hydraulic chambers, and the multi-way switching valve 6 has a plurality of shift positions for switching the communication relationship between the driving side ports and the different working side ports to control the flow direction of the liquid.

The multi-way switching valve 6 can switch the communication relation between the hydraulic cavities and the inlet and the outlet of the driving pump 5 through different gears, and the change of the motion direction of the piston can be realized. The check valve may be configured as necessary to avoid unnecessary backflow of liquid at the drive pump 5, ensuring liquid delivery efficiency.

The drive-side port and the working-side port are merely distinguished by different communication members, and the multi-way switching valve 6 itself is merely a plurality of different ports.

In an embodiment, the multi-way switching valve 6 includes a valve seat 61 and a valve core 62 that are matched with each other, a valve cavity is provided in the valve seat 61, a plurality of interfaces 65 are provided on a side wall of the valve cavity for connecting the driving pump and each hydraulic cavity, the valve core 62 is disposed in the valve cavity and is rotationally matched with the valve cavity, a plurality of flow channels 66 are provided on an outer peripheral wall of the valve core 62, when the valve core 62 rotates to different positions, the plurality of flow channels 66 and the plurality of interfaces 65 have corresponding communication relations, for easy identification, in an embodiment, the multi-way switching valve 6 is embedded in the control handle 2, and the control handle 2 is provided with a mark 64 indicating a gear position where the multi-way switching valve 6 is located.

The valve core 62 is connected with a wrench 63, which is rotated to different angles to point to the marks 64 of different gears, in this embodiment, in order to match the functions of different gears, seven flow passages 66 (indicated by arrows in the figure) are provided, and of course, the flow passages 66 can be correspondingly increased or decreased according to the functions to be realized.

In one embodiment, the control valve further comprises:

the outlet of the driving pump 5 is communicated to the liquid storage tank 7 through the first one-way valve; the driving side interface of the multi-way switching valve is communicated with the inlet of the driving pump 5 through a second one-way valve.

To further instruct the operation, the multi-way selector valve 6 is fitted into the control handle 2, and the control handle 2 is provided with a mark indicating the gear position of the multi-way selector valve 6.

Referring to fig. 3a, 3b, although the shape of the control handle 2 is not strictly limited, for convenience of operation, the control handle 2 includes a working portion 21 and a grip portion 22 connected to the working portion 21 in some embodiments. The cylinder barrel 3 is located within the working portion 21, i.e. the working portion 21 as a whole serves to provide a hydraulic chamber, the working portion 21 also having opposite distal 211 and proximal 212 ends, the relative orientation of which is described similarly to the other components.

The shape of the holding portion 22 is convenient for holding operation, for example, the holding portion 22 has a length direction as a whole, and since the cylinder is installed in the working portion 21, the length direction of the holding portion 22 is substantially perpendicular to the cylinder axial direction, or slightly oblique, with the moving direction of the piston in the cylinder being the cylinder axial direction. The overall shape of the control handle 2 is similar to a pistol shape in order to further enhance the grip feel and to conform to the hand shape characteristics, as regards the two parts, the working part 21 and the grip part 22, which are L-shaped or T-shaped overall. In the hydraulic drive circuit, some control components, such as switches, etc., which need to be operated in real time, may be provided at the grip portion 22 for one-handed operation.

In order to facilitate one-hand operation, an embodiment of the present application provides an interventional device delivery system, including a plurality of tubes coaxially arranged from inside to outside, and a control handle 2 for driving the plurality of tubes to move relatively, a distal end of each tube is used for operating an interventional device in cooperation with each other, a proximal end of each tube is connected to the control handle 2, a hydraulic drive circuit for driving the tubes to move relatively is configured at the control handle 2, the hydraulic drive circuit includes at least one drive pump 5 for driving liquid to flow, and a control valve for controlling the flow direction of the liquid;

the control handle 2 is provided with a grip portion 22, and the operating member for driving the pump 5 is provided in the grip portion 22, and the operating member for the control valve is adjacent to the grip portion 22.

In order to make the hydraulic driving circuit work, a simpler and more direct mode is manual operation, in the operation process, generally, the frequently-operated components are the driving pump 5 and the control valve, and the operating components of the two are arranged on the holding part 22 or the part adjacent to the holding part 22, so that the operation can be carried out by one hand conveniently, and the operation or the holding of other equipment by the other hand is convenient.

Referring to fig. 3a, 3b, and 12a to 12e, in an embodiment, the control valve employs a multi-way switching valve 6, the interventional device delivery system in this embodiment includes a plurality of tubes coaxially arranged from inside to outside, and a control handle 2 for driving the plurality of tubes to move relatively, distal ends of the tubes are used for operating the interventional device in cooperation with each other, proximal ends of the tubes are connected to the control handle 2, a hydraulic drive circuit for driving the tubes to move relatively is further configured at the control handle 2, the hydraulic drive circuit includes the multi-way switching valve 6 for switching a flow direction of a liquid, and the multi-way switching valve 6 includes:

two valve seats which are oppositely arranged, wherein one valve seat is provided with a driving side interface 67 which is connected into a hydraulic driving circuit, and the other valve seat is provided with a working side interface 68 which is connected into the hydraulic driving circuit;

the valve core 62 is hermetically buckled by the two valve seats and is rotatably installed, the valve core 62 is provided with a communication hole 624, and the communication hole 624 is used for communicating the corresponding driving side port 67 with the working side port 68 when the valve core 62 rotates to different angles;

and a wrench 63 cooperating with the valve core 62 to change the rotation angle of the valve core 62.

Referring to fig. 3a, 3b, 12a to 12e, in order to facilitate the one-handed operation and the switching of the modes (i.e., the switching of the gears), one embodiment of the present invention provides an interventional device delivery system, which includes a plurality of tubes coaxially arranged from inside to outside, and a control handle 2 for driving the plurality of tubes to move relatively, wherein distal ends of the tubes are used for operating the interventional device in cooperation with each other, proximal ends of the tubes are connected to the control handle 2, and a hydraulic driving circuit for driving the tubes to move relatively is further configured at the control handle 2; the hydraulic drive circuit includes switching liquid flow direction's multi-way diverter valve 6, and multi-way diverter valve 6 includes:

two valve seats which are oppositely arranged, wherein one valve seat is provided with a driving side interface 67 which is accessed into a hydraulic driving circuit, and the other valve seat is provided with a working side interface 68 which is accessed into the hydraulic driving circuit;

the valve core 62 is hermetically buckled by the two valve seats and is rotatably installed, the valve core 62 is provided with a communication hole 624, and the communication hole 624 is used for communicating the corresponding driving side port 67 with the working side port 68 when the valve core 62 rotates to different angles;

a wrench 63 linked with the valve core 62 through a one-way clutch mechanism for changing the rotation angle of the valve core 62;

a key return 69 acting between the key 63 and the at least one valve seat.

In this embodiment, the wrench 63 and the valve core 62 are driven by a one-way clutch mechanism, that is, the shift of each gear is realized by one-way rotation of the valve core 62, rather than reciprocating two-way rotation. The spanner can be buckled by a single finger, and the physiological structure characteristics of the fingers of an operator are met. In the hydraulic drive circuit, the power of the fluid flow may be provided by the prior art, or in combination with the drive pump 5 in other embodiments.

With reference to fig. 3a to 3e, in an embodiment, the control handle 2 includes a working portion 21 and a holding portion 22 connected to the working portion 21, a cylinder 3 with a piston therein is disposed in the working portion 21, a plurality of pipes penetrate through the cylinder 3 and are connected to the piston or fixed relative to the cylinder 3, and the pipes are driven to move relative to each other in the cylinder 3 by hydraulic means;

the cylinder 3 is connected to the working side ports 68 on both sides of the piston, and the hydraulic drive circuit further includes a drive pump 5 connected to each of the drive side ports 67 for driving the flow of fluid.

In one embodiment, the cylinder 3 comprises a first cylinder 31 and a second cylinder 32 which are sequentially butted along the axial direction, wherein a first piston 4 is slidably mounted in the first cylinder 31, a second piston 9 is slidably mounted in the second cylinder 32, and the pipe comprises a first pipe 11, an intermediate pipe 13 and a second pipe 12 which are coaxially arranged from inside to outside;

all the pipe fittings enter from the far end of the first cylinder 31, wherein the first pipe fitting 11 is fixed with the first piston 4, the middle pipe fitting 13 extends out of the first piston 4, enters the second cylinder 32 through the isolation sealing part 34 and is fixed with the second piston 9, and the first pipe fitting 11 extends out of the second piston 9 and is fixed to the near end of the second cylinder 32.

Referring to fig. 10, in one embodiment, the drive pump 5 includes:

a pump housing 51 fixed in the control handle 2 and connected to the hydraulic drive circuit;

a working element 52 movably mounted in the pump housing 51 for driving the flow of the fluid;

a driving member 53 movably mounted to the grip 22 and linked with the working element 52;

a return spring 56 acting between the control handle 2 and the driver 53.

The outlet 55 and the inlet 54 of the drive pump 5 are both provided in the pump housing 51, and two drive-side ports 67 of the multi-way switching valve 6 are provided and connected to the outlet 55 and the inlet 54 of the drive pump 5, respectively. The necessary check valves may also be provided in combination with the previously described related embodiments, as well as the fluid reservoir 7 communicating between the inlet 54 and the corresponding drive-side port 67.

The positional relationship among the wrench 63, the holding portion 22, and the working portion 21 also has a certain influence on the convenience of the operation, and in one embodiment, the wrench 63 and the holding portion 22 are located on the same side of the working portion 21 in the radial direction. In operation, the wrench 63 and the grip 22 are closer to the operator, while the working portion is relatively farther from the operator.

In a preferred embodiment, the wrench 63 is located on the proximal side of the grip 22 with the drive member 53 facing the wrench 63. The operation can be similar to a pistol in that the first finger grips the wrench 63, the remaining four fingers grasp the holding portion 22 and press the driving member 53 to drive the driving pump 5, the wrench 63 is gripped when the gear shifting is needed, the gripping of the control handle 2 and the operation and control of the hydraulic driving circuit can be completed by one hand, thereby greatly releasing manpower and avoiding the inconvenience of multi-user cooperation operation.

To prevent slipping off during gripping, a retaining stopper 28 is provided at the end of the grip portion 22 (i.e., the end remote from the working portion 21). The anti-slip stopper 28 can extend to the far end to straddle other parts of the housing of the control handle 2, and the anti-slip stopper 28 is in a strip shape and extends along a smooth curve, so that the hand feeling can be further improved.

In order to improve the holding stability in cooperation with the operation of the wrench 63, in one embodiment, the anti-slip stopper 28 surrounds the wrench 63. I.e. the wrench 63 is in a closed area.

The valve core 62 and the wrench 63 may be in a separate linkage or may be in an integral structure. The end of the wrench 63 is hooked to facilitate hooking.

In the embodiment shown in fig. 12a to 12e, the multi-way switching valve 6 has a plurality of shift positions for switching the communication relationship between the drive-side port 67 and the different operation-side ports 68 to control the flow direction of the liquid. The valve seat 61 is buckled by two parts, and the valve core 62 rotates between the two parts, and when the valve core rotates to different angles, the valve core corresponds to different gears. Further details or modifications of the multi-way switching valve 6 will be described further below.

Because the valve core 62 and the valve seat 61 are rotationally matched, sealing is required to be ensured, and when sufficient machining precision exists, the valve core 62 and the valve seat 61 are tightly attached to each other, but relatively harsh requirements are undoubtedly provided for materials and processes, and in order to reduce the process requirements and facilitate machining, in one embodiment, each valve seat is provided with an installation groove on one side facing the valve core 62, a sealing gasket is fixedly embedded in the installation groove, and the installation groove is abutted to the valve core 62 through the sealing gasket for sealing.

In one embodiment, the gasket seal is positioned in the following manner: and positioning teeth which are mutually clamped are arranged between the inner periphery of the mounting groove and the outer periphery of the sealing gasket. Certainly can also adopt other modes of linking firmly in order to fix a position, adopt the mode of location tooth to remove other locating part from in this embodiment, also need not glue bonding, during the assembly seal gasket just impress the mounting groove can, the simple operation.

The mutually engaged positioning teeth can prevent the sealing gasket from rotating with the valve core 62, for example, in the figure, the inner periphery of the mounting groove of the first valve seat 61a is provided with a second positioning tooth 614, and the outer periphery of the first sealing gasket 611 in the mounting groove is provided with a first positioning tooth 6111 which is mutually engaged with the second positioning tooth 614. Similarly, in the figure, the inner periphery of the mounting groove of the second valve seat 61b is provided with a third positioning tooth 615, and the outer periphery of the second sealing gasket 617 in the mounting groove is provided with a fourth positioning tooth 6171 engaged with the third positioning tooth 615.

The sealing gasket can be made of elastic materials such as rubber and the like, so that necessary sealing is kept conveniently, and in addition, the valve seat or other parts can also be made of transparent materials, so that the in-position condition can be observed and verified during assembly, and visual inspection operation in the using process is facilitated.

One of the two valve seats is a first valve seat 61a provided with a driving side port 67, and the other valve seat is a second valve seat 61b provided with a working side port 68;

a liquid inlet hole 613 communicated with the driving side interface 67 is formed in one side of the first valve seat 61a facing the valve core, and a first liquid passing hole 6112 which corresponds to the liquid inlet hole 613 in position and is communicated with the liquid inlet hole 611 is formed in the first sealing gasket 611 embedded in the first valve seat 61 a;

a liquid outlet hole 616 communicated with the working side interface 68 is formed in one side, facing the valve core, of the second valve seat 61b, and a second liquid passing hole 6172 corresponding to the liquid outlet hole 616 in position and communicated with each other is formed in a second sealing gasket 617 embedded in the second valve seat 61 b;

when the valve core rotates to different angles, the communication hole 624 on the valve core communicates the corresponding first liquid passing hole 6112 with the corresponding second liquid passing hole 6172.

Two driving side ports 67 are provided on the first valve seat 61a, and are respectively connected to the inlet and outlet of the driving pump 5, and correspondingly, two liquid inlet holes 613 and two communication holes 624 are respectively provided in one-to-one correspondence, and a cap 618 may be further provided on the side of the first valve seat 61a facing away from the other valve seat.

The working-side ports 68 of the second valve seat 61b are configured according to the number of shift positions, for example, in the relevant drawings of the present embodiment, four working-side ports 68 are provided, four liquid outlet holes 616 are also configured correspondingly one by one, in order to facilitate the shifting of the gears, a plurality of second liquid passing holes 6172 are formed in the second sealing gasket 617, for example, eight second liquid passing holes 6172 are connected to one liquid outlet 616, when the valve core 62 rotates to different angles, the two connecting holes 624 correspond to the two second liquid passing holes 6172 at corresponding positions, the two second liquid passing holes 6172 at the position are just communicated with the two corresponding liquid outlet holes 616, in order to adapt to the distribution of the second liquid passing holes 6172, each liquid outlet hole 616 extends in a strip shape, that is, the same liquid outlet hole 616 can be connected to a plurality of second liquid passing holes 6172, so as to ensure that the positions of the two communicating holes 624 are changed under the premise that the position of the second sealing gasket 617 is not changed.

The liquid inlet holes 613 are two, and each liquid inlet hole 613 is located at a different radial position relative to the rotation axis of the valve core; the first liquid passing hole 6112 is matched with the corresponding liquid inlet hole 613 in position;

the valve core 62 is provided with an inner annular groove 623 and an outer annular groove 623 on the side facing the first valve seat 61a, each annular groove 623 is communicated with one of the liquid inlet holes 613, and two of the communication holes 624 are respectively communicated with one of the annular grooves 623.

The inner and outer annular grooves 623 can ensure communication with the fluid inlet port 613 corresponding to the radial position regardless of the rotation angle of the spool 62.

The valve core 62 is rotatably mounted between the two valve seats through a rotating shaft 621, the valve core 62 and the wrench 63 are linked through a one-way clutch mechanism, namely, the wrench 63 can drive the valve core 62 to rotate only in one direction (circumferential direction), and after the wrench 63 moves in place, the wrench resetting piece 69 drives the wrench 63 to reset, and the valve core 62 is kept still and repeatedly, so that the valve core 62 can be driven to be switched to each gear.

In one embodiment, the wrench 63 includes an annular sleeve 631 located at the outer periphery of the valve core 62, and a hook 633 fixed to the annular sleeve 631 and extending to the outside of the control handle 2; the inner edge of the annular sleeve 631 is linked with the outer periphery of the valve core 62 through a mutually matched one-way clutch mechanism.

The hook 633 is used for finger-pulling operation, and is preferably hooked and located on the proximal side of the grip 22. The two valve seats are provided with positioning columns which are mutually inserted and fixed by combining a fastening piece, in order to limit the limit angle of the wrench 63 rotating at each time, a corresponding blocking piece can be arranged on the valve seat 61, or a limit strip hole is enclosed between the two valve seats, the hooking part 633 moves in the limit strip hole, and the length of the limit strip hole limits the movement stroke of the hooking part 633.

The one-way clutch mechanism includes:

ratchets 622 circumferentially disposed about the valve core 62;

elastic claws 632 fixed to the inner periphery of the annular sleeve 631;

the wrench 63 has opposite forward and reverse directions relative to the rotation direction of the valve core 62, when the wrench 63 rotates in the forward direction, the elastic claw 632 engages with the ratchet 622 to drive the valve core 62, when the wrench rotates in the reverse direction, the elastic claw 632 deforms to slip off the ratchet 622, and the wrench resetting piece 69 drives the wrench 63 to rotate in the reverse direction.

The teeth of the ratchet teeth 622 are oriented such that one side is engaged with the resilient latch 632 and the other side is adapted to allow the resilient latch 632 to slide off, and the resilient latch 632 extends generally circumferentially to allow the valve spool to retract radially under the pressure of the ratchet teeth 622 when it is rotating in reverse and then slide off of each other, and thereafter expand radially outward under its own resilience, and then engage the previously slipped ratchet teeth 622 again if the valve spool 62 is rotating in forward.

To better mate with the ratchet 622, in one embodiment, the resilient fingers 632 extend circumferentially around the annular sleeve 631 and are inwardly bowed. The elastic claws 632 are uniformly distributed along the circumferential direction of the annular sleeve 631 at intervals of 2-4.

The key return 69 is a coil spring extending about the axis of the spool and having one end connected to the valve seat 61 and the other end connected to the annular sleeve 631.

When the wrench 63 drives the valve core 62 to rotate forward, the spring force of the coil spring is overcome, so that the coil spring stores energy, when the wrench 63 is released, the coil spring drives the wrench to rotate reversely and reset, in order to balance the stress, in an embodiment, the coil spring is two coils side by side, in the axial direction of the valve core 62, each coil spring is respectively located at two sides of the annular sleeve 631, one end of each coil spring is provided with a positioning bend 692 inserted into a corresponding side valve seat, the other end of each coil spring is connected with each other to form a positioning cross rod 691, and the outer periphery of the annular sleeve 631 is provided with a clamping groove 634 accommodating the positioning cross rod 691.

Correspondingly, each valve seat is provided with an insertion hole 619 for inserting the positioning bend 692.

In order to further stabilize the position of the coil spring before and after deformation, in one embodiment, the outer periphery of the valve core 62 includes three sections in the axial direction of the valve core, the ratchets 622 are fixedly distributed at the middle section, smooth sections 625 are located at two sides, and two circles of coil springs are respectively sleeved on the smooth sections 625 at the corresponding sides.

Referring to fig. 13a to 13b, in an embodiment of the present invention, two cylinders are adopted, namely, a first cylinder 31 and a second cylinder 32, a first piston 4 is installed in the first cylinder 31, and the first cylinder 31 has a communication port 314 and a communication port 315; the second cylinder 32 has the second piston 9 mounted therein, and the second cylinder 32 has a communication port 324 and a communication port 325.

The pipe fittings which move axially and relatively comprise a second pipe fitting fixedly connected with the first piston 4, a middle pipe fitting fixedly connected with the second piston 9 and a first pipe fitting fixedly connected with the control handle, in addition, the control handle is also connected with a protection pipe positioned at the periphery of the second pipe fitting through a fixing sleeve 8, and the fixing sleeve 8 connected with the protection pipe is provided with an exhaust hole 82.

Also disposed in the hydraulic drive circuit are a multi-way switching valve 6, a drive pump 5 having an inlet 54 and an outlet 55, and a reservoir 7 having an inlet 73 and an outlet 74. A first check valve 331 is connected to the inlet 54 of the drive pump 5; a second check valve 332 is connected to the outlet 55 of the drive pump 5. Each component communicates through a respective hydraulic line 33.

In this embodiment, the multi-way switching valve 6 has seven interfaces, two of which are driving side interfaces 67 respectively communicated with the inlet and outlet of the driving pump 5 (indirectly communicated through the check valve and the liquid storage tank), and the other five of the multi-way switching valve 6 are working side interfaces 68, two of which are connected to two communication ports of the first cylinder 31, the other two are connected to two communication ports of the second cylinder 32, and one is connected to the exhaust hole 82.

If the exhaust is separately provided with a pipeline, a multi-way switching valve with six interfaces can be adopted, namely two multi-way switching valves are driving side interfaces 67 which are respectively communicated with the inlet and the outlet of the driving pump 5 (indirectly communicated through a one-way valve and a liquid storage tank), and the other four multi-way switching valves are working side interfaces 68, wherein two multi-way switching valves are connected with two communication ports of the first cylinder 31, and the other two multi-way switching valves are connected with two communication ports of the second cylinder 32.

The multi-way switching valve 6 is configured to communicate the drive-side port 67 and the operation-side port 68 via a plurality of flow passages 66 on the valve body, and the multi-way switching valve 6 has seven ports in common, and is divided into five shift positions D1 to D5 based on different communication relationships, and each shift position implements different functions.

Specifically, the functions of each gear are as follows:

taking the multi-way switching valve 6 with six interfaces as an example, two of the interfaces are driving side interfaces 67 respectively communicated with the inlet and outlet of the driving pump 5 (indirectly communicated through a one-way valve and a liquid storage tank), and the other four interfaces of the multi-way switching valve 6 are working side interfaces 68, two of which are connected with two communication ports of the first cylinder 31, and the other two are connected with two communication ports of the second cylinder 32, and can be divided into four gears D1-D4 on the upper table based on different communication relations, and each gear realizes different functions. The vent 82 is connected to a connector which can be inserted into the housing of the control handle to facilitate the venting by filling with saline in cooperation with external tubing.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. Intervention apparatus conveying system convenient to switch mode includes by interior and many pipe fittings of outer coaxial setting, and the drive many pipe fitting relative motion's brake valve handle, each pipe fitting distal end are used for mutually supporting the operation and intervene the apparatus, and the proximal end of each pipe fitting is connected to brake valve handle, its characterized in that, brake valve handle department still disposes the hydraulic drive return circuit of driving each pipe fitting relative motion, the hydraulic drive return circuit is including switching the switching valve that leads to more of liquid flow direction, the switching valve that leads to more includes:

the hydraulic drive circuit comprises two valve seats which are oppositely arranged, wherein one valve seat is provided with a drive side interface which is accessed into the hydraulic drive circuit, and the other valve seat is provided with a working side interface which is accessed into the hydraulic drive circuit;

the valve core is sealed and buckled by the two valve seats and is rotatably installed, the valve core is provided with a communication hole, and the communication hole is used for communicating the corresponding driving side interface with the working side interface when the valve core rotates to different angles;

the wrench is linked with the valve core through a one-way clutch mechanism and is used for changing the rotating angle of the valve core;

a wrench reset member acting between the wrench and the at least one valve seat.

2. The interventional instrument conveying system convenient for switching modes as claimed in claim 1, wherein the control handle comprises a working part and a holding part connected with the working part, a cylinder with a piston therein is arranged in the working part, the plurality of pipes penetrate through the cylinder and are connected to the piston or fixed relative to the cylinder, and the pipes are driven to move relatively in the cylinder in a hydraulic mode;

the hydraulic drive circuit also comprises a drive pump which is communicated with the driving side interfaces and is used for driving liquid to flow.

3. The interventional instrument delivery system facilitating switching modes of claim 2, wherein the drive pump comprises:

a pump housing fixed in the control handle and connected into the hydraulic drive circuit;

a working element movably mounted in the pump housing for driving the flow of fluid;

the driving piece is movably arranged on the holding part and is linked with the work piece, and the driving piece is used as an operation part of the driving pump;

a return spring acting between the control handle and the drive member.

4. The interventional instrument delivery system facilitating mode switching as defined in claim 3, wherein the cylinder comprises a first cylinder and a second cylinder that are axially and sequentially abutted, wherein a first piston is slidably mounted in the first cylinder, a second piston is slidably mounted in the second cylinder, and the plurality of pipe elements comprise a first pipe element, an intermediate pipe element and a second pipe element that are coaxially arranged from inside to outside;

all pipe fittings enter from the far end of the first cylinder barrel, wherein the first pipe fitting is fixed with the first piston, the middle pipe fitting extends out of the first piston and then enters the second cylinder barrel through the isolation sealing piece and is fixed with the second piston, and the first pipe fitting extends out of the second piston and then is fixed to the near end of the second cylinder barrel.

5. The interventional instrument delivery system facilitating switching between modes of claim 1, wherein one of the two valve seats is a first valve seat provided with the drive-side port and the other valve seat is a second valve seat provided with the working-side port;

a liquid inlet hole communicated with the driving side interface is formed in one side, facing the valve core, of the first valve seat, and first liquid passing holes which correspond to the liquid inlet hole in position and are communicated with each other are formed in a first sealing gasket in the first valve seat;

a liquid outlet hole communicated with the working side interface is formed in one side, facing the valve core, of the second valve seat, and second liquid passing holes which correspond to the liquid outlet hole in position and are communicated with each other are formed in a second sealing gasket in the second valve seat;

when the valve core rotates to different angles, the communication hole on the valve core communicates the corresponding first liquid passing hole with the corresponding second liquid passing hole.

6. The interventional instrument delivery system facilitating shifting of mode of claim 5, wherein the access ports are two, each access port being at a different radial position relative to the axis of rotation of the valve spool; the first liquid passing hole is matched with the corresponding liquid inlet hole in position;

the valve core is provided with an inner annular groove and an outer annular groove on one side facing the first valve seat, each annular groove is communicated with one of the liquid inlet holes, and the two communicating holes are respectively communicated with one of the annular grooves.

7. The interventional instrument delivery system facilitating mode switching as defined in claim 1, wherein the wrench includes an annular sleeve at an outer periphery of the valve cartridge and a hook portion secured to the annular sleeve and extending outside of the control handle; the inner edge of the annular sleeve is linked with the outer periphery of the valve core through a one-way clutch mechanism which is matched with the inner edge of the annular sleeve;

the wrench reset piece is a coil spring extending around the axis of the valve core, one end of the coil spring is connected with the valve seat, and the other end of the coil spring is connected with the annular sleeve.

8. The interventional instrument delivery system facilitating mode switching as defined in claim 7, wherein the coil springs are two coils side by side, each coil spring is located on two sides of the annular sleeve in the axial direction of the valve core, one end of each coil spring is provided with a positioning bend inserted into the valve seat on the corresponding side, the other end of each coil spring is connected with each other to form a positioning cross rod, and the outer periphery of the annular sleeve is provided with a clamping groove for accommodating the positioning cross rod.

9. The interventional instrument delivery system facilitating switching between modes of claim 8, wherein each valve seat defines a receptacle into which the positioning bend is inserted.

10. The interventional instrument delivery system facilitating switching modes of claim 8, wherein the one-way clutch mechanism comprises:

the ratchets are annularly distributed on the periphery of the valve core;

the elastic clamping jaws are fixed on the inner periphery of the annular sleeve;

the wrench has opposite forward and reverse directions relative to the rotation direction of the valve core, when the wrench rotates in the forward direction, the elastic clamping jaw is meshed with the ratchet to drive the valve core, when the wrench rotates in the reverse direction, the elastic clamping jaw deforms and slips off the ratchet, and the wrench resetting piece drives the wrench to rotate in the reverse direction;

in the axial direction of the valve core, the periphery of the valve core comprises three sections, the ratchets are fixedly distributed at the middle section, smooth sections are arranged at two sides of the middle section, and the two rings of coil springs are respectively sleeved on the smooth sections at the corresponding sides.

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