CN116327442A - Conveying system and control handle thereof - Google Patents

Abstract

The invention relates to a conveying system and a control handle thereof, wherein the control handle comprises a first operation part and a second operation part which are connected, and the first operation part is used for controlling the second pipe fitting to move along the axial direction relative to the first pipe fitting; the second operation part comprises a main body part and a locking switch connected with the main body part, the position of the main body part corresponding to the locking switch forms a locking position, the locking switch is used for limiting the first operation part to the locking position in the axial direction, the locking switch can unlock the first operation part, and when the locking switch unlocks the first operation part, the first operation part can move relative to the second operation part in the axial direction. According to the conveying system and the control handle thereof, the control mode of the control handle can be conveniently switched by using the locking switch, so that the relative movement between the operated pipe fittings can be realized, and the synchronous movement of the pipe fittings can be conveniently operated, so that the operation convenience of the control handle is improved.

Description

Conveying system and control handle thereof

Technical Field

The invention relates to the technical field of interventional medical treatment, in particular to a conveying system and a control handle thereof.

Background

The investigation shows that the probability of suffering from coronary heart disease, cardiovascular and cerebrovascular diseases, heart valve diseases, tumors and other diseases of middle-aged and elderly people rises year by year. These diseases directly affect the quality of life and even the life safety of the middle-aged and elderly people. Traditional surgical treatment is still the treatment of choice for critically ill patients, but for elderly, combined multi-organ disease, patients with history of open chest surgery and poor physical recovery, traditional surgery is at great risk, has high mortality, and some patients even have no chance of surgery. In recent decades, the international heart valve interventional therapy has been explored continuously to make obvious progress, and the heart valve interventional therapy becomes a branch with the most development prospect in the interventional therapy field.

Interventional therapy is a brand new treatment technology developed in recent international years, and the principle of the interventional therapy is that a modern high-tech means is utilized to carry out micro-wound treatment, special precision instruments are introduced into a human body under the guidance of medical imaging equipment, and diagnosis and local treatment are carried out on in-vivo lesions. The technique has the characteristics of no operation, small wound, quick recovery, good effect and the like, and avoids the harm to patients caused by the traditional surgical operation.

The control handle is used as an operation part to provide a power source for the whole interventional therapy. There are usually pure manual handles, pure electric handles or manual and electric hybrid handles, and sufficient safety, effectiveness and economy are ensured. However, in the current conveying system, the handle operation convenience is not enough.

Disclosure of Invention

Based on this, it is necessary to provide a control handle and a conveying system including the control handle for solving the problem that the control handle of the conventional conveying system is not good in operation convenience.

In one aspect, the present invention provides a control handle for controlling axial movement of a first pipe and a second pipe, the second pipe being movably sleeved on the periphery of the first pipe, the control handle comprising:

a first operation part which is used for being connected with the first pipe fitting and the second pipe fitting and controlling the second pipe fitting to move along the axial direction relative to the first pipe fitting;

the second operation portion is connected with the first operation portion, the second operation portion includes main part and with the locking switch that the main part is connected, the main part correspond the locking switch's position forms the locking position, the locking switch is used for with first operation portion axial limit is located the locking position, just the locking switch can be released to the locking of first operation portion, when the locking switch is released to the locking of first operation portion, first operation portion can be relative the second operation portion is along axial displacement.

In another aspect, the present invention provides a delivery system comprising a catheter assembly having a proximal end coupled to a control handle as described above for actuating axial movement of the catheter assembly.

According to the conveying system and the control handle thereof, the locking switch is used for controllably locking the first operation part, when the locking switch axially limits the first operation part at the locking position, axial displacement does not occur between the first operation part and the second operation part, so that when the first operation part is used for operating the second pipe to axially move relative to the first pipe, the first pipe connected with the first operation part is axially limited relative to the second operation part, adverse influence on operation results caused by axial displacement of the first pipe relative to the second operation part is avoided, and when the locking switch is used for unlocking the first operation part, the first operation part can be operated to axially move relative to the second operation part, so that the first pipe and the second pipe synchronously move relative to the second operation part. Therefore, the control mode of the control handle can be conveniently switched by utilizing the locking switch, so that the relative motion between the operated pipe fittings can be realized, and the synchronous movement of the pipe fittings can be conveniently operated, thereby improving the operation convenience of the control handle without frequently replacing different operation handles to meet different operation requirements.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a transport system according to an embodiment;

FIG. 2 is a schematic view of the internal structure of a control handle of a delivery system according to one embodiment;

FIG. 3 is a schematic diagram of a control handle according to an embodiment, in which a rotating member drives a driving member to move to a certain position;

FIG. 4 is an enlarged schematic view of a partial structure at circle A of the control handle shown in FIG. 3;

FIG. 5 is a schematic view of a control handle according to an embodiment, wherein a rotating member drives a driving member to move to another position;

FIG. 6 is an enlarged schematic view of a partial structure at circle B of the control handle shown in FIG. 5;

FIG. 7 is a schematic view of a portion of the control handle of a delivery system according to one embodiment;

FIG. 8 is an enlarged schematic view of a partial structure at circle C of the control handle shown in FIG. 7;

FIG. 9 is an enlarged schematic view of a partial structure at circle D of the control handle shown in FIG. 7;

FIG. 10 is an enlarged schematic view of a partial structure at circle E of the control handle shown in FIG. 7;

fig. 11 is an enlarged schematic view of a partial structure at a circle F of the control handle shown in fig. 7.

Reference numerals illustrate: 10. a control handle; 11. a first operation section; 111. a first housing; 111a, grooves; 111b, scale area; 112. a guide tube; 112a, a threaded section; 112b, a first limiting part; 112c, a snap connection; 113. a transmission member; 113a, a threaded mating portion; 113b, end caps; 114. a rotating member; 1141. a threaded tube; 1142. a knob; 115. a casing; 115a, a first engagement portion; 115b, a second limiting part; 1151. a first housing member; 1152. a second housing member; 116. a thread sleeve; 116a, a clamping part; 12. a second operation section; 121. a main body portion; 1211. a second housing; 1212. a support base; 122. a locking switch; 122a, a second engagement portion; 123. an elastic member; 20. a catheter assembly; 21. a first pipe fitting; 22. a second pipe fitting; 23. an evacuation tube fixing seat; 23a, an evacuation port; 24. a seal ring; 25. a positioning seat; 26. and a limit ring.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that "distal end" and "proximal end" are used as terms of orientation, which are terms commonly used in the field of interventional medical devices, where "distal end" refers to an end that is away from an operator during a surgical procedure and "proximal end" refers to an end that is near the operator during a surgical procedure. Axial, refers to a direction parallel to the line connecting the distal center and the proximal center of the medical instrument; radial refers to a direction perpendicular to the axial direction. In this application, the axial limitation between two objects means that the two objects cannot be displaced relative to each other in the axial direction, for example, in the control handle 10 shown in fig. 1, when the lock switch 122 axially limits the first operating portion 11 relative to the second operating portion 12, the first operating portion 11 and the second operating portion 12 cannot move relative to each other in the axial direction.

Referring to fig. 1, an embodiment of the present application provides a delivery system comprising a control handle 10 and a catheter assembly 20, the proximal end of the catheter assembly 20 being coupled to the control handle 10, the control handle 10 being adapted to drive the catheter assembly 20 to move axially.

The catheter assembly 20 may include 2 or more tubing elements. For example, as shown in fig. 1, the catheter assembly 20 includes a first tube 21 and a second tube 22, and the second tube 22 is movably sleeved on the first tube 21. The first tube 21 and the second tube 22 are manipulated to move axially by the control handle 10 for a certain operational purpose.

It should be noted that, the catheter assembly 20 may further include other pipe elements besides the first pipe element 21 and the second pipe element 22, for example, the catheter assembly 20 may further include a third pipe element sleeved outside the second pipe element 22, and the third pipe element may be connected to the housing of the control handle 10, and the control handle 10 is used to adjust the first pipe element 21 and the second pipe element 22 to move axially in the third pipe element so as to meet a certain operation requirement.

For ease of understanding, the delivery system will be further described with respect to use of the delivery system for implantation of an implant into a human body, as an example, for performing interventional procedures.

Specifically, among the tube members of the catheter assembly 20, the first tube member 21 is an inner tube, the second tube member 22 is an outer tube, and the third tube member is a delivery sheath. The distal end of the inner tube and the distal end of the outer tube are connected to the distal end and the proximal end of the implant, respectively, and the implant is radially expanded by axial relative movement of the inner tube and the outer tube. The delivery sheath is used to deliver the implant, and when the implant is in place, the implant is removed from the delivery sheath and released, and during this operation, axial traction of the implant by the inner tube and the outer tube may be used to enable the implant to be controllably retracted for receipt into the delivery sheath, or to be removed from the delivery sheath.

The implant may be a vascular stent, prosthetic valve, or occluder, etc. Accordingly, the implantation site may be a vascular, cardiac or left atrial appendage site.

The number of tubes in the delivery system and how the tubes are configured are not described in detail herein. The present invention is directed to improvements in the control handle 10 to facilitate the ease of operation of lifting the control handle 10 to release or retract the implant by effecting axial movement between, for example, the above-described tubulars.

Specifically, as shown in fig. 1 and 2, the control handle 10 includes a first operating portion 11 and a second operating portion 12 connected. The first operating portion 11 and the second operating portion 12 can enable the control handle to have a plurality of operating modes which can be combined and applied, for example, in a certain operating mode, the axial directions of the first operating portion 11 and the second operating portion 12 are limited, and certain elements can be independently operated by the second operating portion 12 without adverse interference to the operating effect caused by axial displacement of the first operating portion 11 and the second operating portion 12. In another operation mode, the first operation part 11 and the second operation part 12 can move relative to each other along the axial direction, so that the second operation part 12 drives the related elements to move relative to the first operation part 11 along the axial direction, and the operation similar to the operation of withdrawing the inner tube and the outer tube to the delivery sheath is completed.

In the embodiment of the present invention, the first operating portion 11 is used to connect the first tube 21 and the second tube 22, and it is understood that the proximal ends of the first tube 21 and the second tube 22 are connected to the first operating portion 11, and the distal ends of the first tube 21 and the second tube 22 are located outside the first operating portion 11, and the first operating portion 11 is used to control the second tube 22 to move axially relative to the first tube 21 so as to operate an implant connected to the distal ends of the first tube 21 and the second tube 22, for example, to expand or compress the implant by axially moving the first tube 21 and the second tube 22 relative to each other, or to release the implant to the implantation position by releasing the connection to the implant. The purpose of the axial relative movement of the first tube member 21 and the second tube member 22 with respect to each other should not be limited as to the structure of the first operation portion 11, as long as the first operation portion 11 can realize the axial relative movement of the first tube member 21 and the second tube member 22. Specifically, the control handle 10 according to the embodiment of the present invention may be sold separately or used with other components, so long as the structure of the control handle 10 can implement the corresponding operation requirement during the use process. The first tube member 21 and the second tube member 22 are only for convenience of explanation of the operation principle of the control handle 10, and are not limiting of the application scenario of the control handle 10. For example, the axial relative movement of the first tube member 21 and the second tube member 22 by the first operation portion 11 of the control handle 10 may be the aforementioned relative movement between the inner tube and the outer tube, or may be the axial movement of the inner tube relative to a core member (e.g., an elongated member such as a guide wire or a push rod) disposed in the inner tube.

Accordingly, the operations of the first tube 21 and the second tube 22 in the second operation portion 12 are only for facilitating understanding of the manipulation principle of the control handle 10, and are not limited to the application scenario of the control handle 10. For different implementation objects such as a heart valve stent or a vascular stent or a balloon expandable stent, even if the application scene is slightly different, the coverage of the control handle 10 of the present invention is the coverage when adopting the technical scheme consistent with the structure of the control handle 10 of the present invention.

Next, the structure of the control handle 10 in the embodiment of the present invention will be further described herein with reference to the first tube member 21 and the second tube member 22.

As shown in fig. 2 to 4, the second operation portion 12 includes a main body portion 121 and a locking switch 122 connected to the main body portion 121, the locking switch 122 is configured such that a position of the main body portion 121 corresponding to the locking switch 122 forms a locking position, the locking switch 122 is used to axially limit the first operation portion 11 to the second operation portion 12 at the locking position, and the locking switch 122 can release the locking of the first operation portion 11, when the locking switch 122 releases the locking of the first operation portion 11, the first operation portion 11 can move in an axial direction relative to the second operation portion 12, so that the first pipe member 21 and the second pipe member 22 move in an axial direction synchronously relative to the second operation portion 12. It should be noted here that the first tube member 21 and the second tube member 22 move synchronously means to move at the same speed at the same time, that is, the axial relative positions of the first tube member 21 and the second tube member 22 in the first operation portion 11 are unchanged, and that the second tube member 22 moves in the axial direction with respect to the first tube member 21 only when the first operation portion 11 is operated.

In this embodiment, since the locking switch 122 can realize controllable locking of the first operating portion 11, specifically, when the first operating portion 11 moves to the locking position, the locking switch 122 can lock the first operating portion 11 in the locking position, so that the first operating portion 11 cannot move relative to the second operating portion 12, and therefore the first operating portion 11 can be used to stably control the second tubular member 22 to move relative to the first tubular member 21, while the first tubular member 21 keeps axially limited relative to the second operating portion 12 along with the first operating portion 11, thus avoiding that the axial displacement of the first tubular member 21 relative to the second operating portion 12 can cause adverse effects on the control result, for example, in some embodiments, when the implant is released by using the axial relative movement of the first tubular member 21 and the second tubular member 22, if the first operating portion 11 is axially displaced relative to the second operating portion 12, the first tubular member 21 and the second tubular member 22 will drive the implant to axially displace, thus causing inaccurate release position of the implant. For example, in other embodiments, when the implant is expanded by using the axial relative movement of the first tube member 21 and the second tube member 22, if the first operation portion 11 is shifted proximally relative to the second operation portion 12, there is a risk that the implant is retracted into the delivery sheath, and thus the expansion of the implant cannot be completed or the expansion effect is poor.

When the lock switch 122 releases the lock of the first operation portion 11, the second operation portion 12 can be operated to move axially with respect to the first operation portion 11, so that the second operation portion 12 moves axially in synchronization with the whole of the first operation portion 11, for example, the first pipe 21 and the second pipe 22, thereby achieving the effect of retracting these pipes rapidly in synchronization. Therefore, the control mode of the control handle 10 can be conveniently switched by the locking switch 122, so that the relative movement between the operated pipe fittings (such as the first pipe fitting 21 and the second pipe fitting 22) can be realized, and the synchronous movement of the pipe fittings can be conveniently operated, thereby improving the operation convenience of the control handle 10 without frequently replacing different operation handles to meet different operation requirements.

As shown in fig. 3 to 6, the first operating portion 11 includes a first housing 111, a guide tube 112, a transmission member 113, and a rotation member 114.

The guide tube 112 is connected to the first housing 111, such as a snap connection or a screw connection, etc., so long as the guide tube 112 is stably connected to the first housing 111, the transmission member 113 positioned in the guide tube 112 can have a guide effect. Specifically, the transmission member 113 is axially movable in the guide tube 112 and circumferentially limited to the guide tube 112, so that the transmission member 113 can only move in the axial direction of the guide tube 112. The transmission member 113 is configured to be connected to the second tube member 22, so that when the transmission member 113 moves axially along the guide tube 112, the guide tube 112 can drive the second tube member 22 to move axially relative to the first housing 111.

It should be noted that, when the second pipe fitting 22 is disposed, the second pipe fitting 22 movably penetrates through the guide member, so that the guide member also constructs a moving channel of the second pipe fitting 22 in the first housing 111, so that the axial movement of the second pipe fitting 22 is smoother.

The rotating member 114 is rotatably sleeved on the outer periphery of the guide tube 112, and is axially limited on the guide tube 112, and the rotating member 114 is in threaded fit with the transmission member 113. When the rotating member 114 rotates around the guide tube 112, the driving member 113 moves axially relative to the guide tube 112 under the driving of the thread of the rotating member 114, so that the driving member 113 drives the second tube member 22 to move axially relative to the first tube member 21.

As shown in fig. 3 and 4, the rotating member 114 includes a threaded pipe 1141, the threaded pipe 1141 has an internal thread, the transmitting member 113 has a thread engaging portion 113a, the guide pipe 112 is provided with a clearance groove (not shown), and the thread engaging portion 113a passes through the clearance groove and is threadedly engaged with the internal thread. In this embodiment, the clearance groove is utilized to provide clearance space for the threaded engagement portion 113a, so that the rotating member 114 located outside the guide tube 112 can rotate to realize that the driving member 113 located in the guide tube 112 is screwed to move in the axial direction, so that the driving member 113 stably drives the second tube 22 to move in the axial direction in the guide tube 112. It should be noted that, the first pipe fitting 21 and the guide tube 112 are both axially limited to the first housing 111, so that the transmission member 113 drives the second pipe fitting 22 to axially move in the guide tube 112, thereby realizing that the second pipe fitting 22 axially moves relative to the first pipe fitting 21.

Further, the clearance groove is parallel to the axial direction of the transmission member 113 and is used for circumferentially limiting the threaded engagement portion 113a to the guide tube 112, that is, the threaded engagement portion 113a is engaged with the clearance groove, so that the transmission member 113 cannot rotate around the axial direction of the transmission member 113, and the circumferential limitation between the two is realized. In this embodiment, when the threaded pipe 1141 rotates around the guide pipe 112, the threaded pipe 1141 drives the threaded fitting portion 113a to move along the guide groove, and this rotation of the threaded pipe 1141 is used to realize that the threaded fitting portion 113a drives the transmission member 113 to move axially relative to the guide pipe 112, which has good stability and high precision, and is beneficial to realizing that the second pipe 22 moves axially accurately relative to the first pipe 21.

The rotary member 114 includes a knob 1142 coupled to the outside of the threaded tube 1141 to facilitate rotation of the rotary member 114 about the guide tube 112 by manipulation of the knob 1142. The knob 1142 may be made of metal or plastic, and is not limited thereto. The knob 1142 may be snap-fit to the threaded tube 1141, or may be connected to the threaded tube 1141 by a screw or pin connection. Knob 1142 may include a plurality of shells disposed opposite one another to facilitate the machining of knob 1142 and the assembly to rotor 114.

As shown in fig. 7 and 8, the first operating portion 11 includes a housing 115, and the housing 115 is axially limited to the first housing 111. The housing 115 has a first engaging portion 115a, the main body 121 of the second operating portion 12 includes a second housing 1211, the lock switch 122 is movably connected to the second housing 1211, and the lock switch 122 has a second engaging portion 122a. The casing 115 is axially movable relative to the second casing 1211, and when the first operating portion 11 is located at the locking position, the casing 115 is accommodated in the second casing 1211 and enables the first engaging portion 115a to cooperate with the second engaging portion 122a, so as to limit the axial movement of the casing 115 relative to the second casing 1211.

Further, an elastic member 123 is disposed between the locking switch 122 and the second housing 1211, the elastic member 123 is configured to drive the locking switch 122 to move in a resetting manner relative to the second housing 1211, and when the first engaging portion 115a moves to be opposite to the second engaging portion 122a, the elastic member 123 makes the first engaging portion 115a cooperate with the second engaging portion 122a. The elastic member 123 may be a spring, a spring plate or an elastic rod, which is not limited herein.

The main body 121 of the second operating portion 12 includes a supporting seat 1212, the supporting seat 1212 is connected to the second housing 1211, and the elastic member 123 is mounted on the supporting seat 1212 and elastically presses the locking switch 122, so that the locking switch 122 has a movement tendency in a direction away from the axis of the guide tube 112.

As shown in fig. 7 and 9, the guide tube 112 is provided with a screw thread segment 112a on the circumferential side, and the proximal end of the hub 115 is fitted with the screw thread segment 112 a. With this structural arrangement, when the sleeve 115 is installed, only the proximal end of the sleeve 115 needs to be pushed along the guide tube 112 to the threaded section 112a, and the threaded section 112a is in threaded engagement with the sleeve 115, so that the stability is good and the installation is convenient.

It should be noted that, the casing 115 and the guide tube 112 may be directly screwed, or may be indirectly screwed through other structural members. For example, in some embodiments, the first operating portion 11 includes a threaded sleeve 116, the threaded sleeve 116 having an internal thread that mates with the threaded section 112a, and a snap-fit portion 116a located outside the threaded sleeve 116, the snap-fit portion 116a being utilized to connect the housing 115 to the threaded sleeve 116 such that the housing 115 is stably connected to the guide tube 112 when the threaded sleeve 116 is threadedly mated with the guide tube 112.

The casing 115 may be formed by connecting 2 or more casings, for example, as shown in fig. 7 and 8, the casing 115 includes a first casing 1151 and a second casing 1152 that are axially split, and the first casing 1151 and the second casing 1152 may be connected by a snap connection or a screw connection, or may be clamped with a clamping portion 116a on the threaded sleeve 116.

Further, regardless of the machining accuracy of the case 115, the case 115 is coaxially connected with the guide tube 112 such that the axis of rotation of the rotary member 114 about the guide tube 112 is the axis of axial movement of the case 115 relative to the second housing 1211, so that the rotational operation and the axial movement operation of the control handle 10 are more handy.

As shown in fig. 7 and 10, the proximal end of the guide tube 112 is provided with a first limiting portion 112b, and the sleeve 115 is disposed around the guide tube 112 and has a second limiting portion 115b. The rotating member 114 is axially limited between the first limiting portion 112b and the second limiting portion 115b, so that the rotating member 114 can only rotate about the axial direction with respect to the guide tube 112, and when the first housing 111 moves in the axial direction with respect to the second housing 1211, the rotating member 114 also moves in the axial direction with respect to the second housing 1211 along with the first housing 111, specifically, the first operating portion 11 moves in the axial direction with respect to the second housing 1211 of the second operating portion 12 as a whole.

The outer side of the first limiting part 112b is connected with a buckling connection part 112c, and the buckling connection part 112c is connected with the first shell 111 in a buckling manner, so that the connecting pipe is stably connected with the first shell 111.

Referring to fig. 1 and 2 again, in some embodiments, the proximal end of the second tube 22 is connected to an evacuation tube fixing seat 23, the first housing 111 is provided with a groove 111a, when the second tube 22 moves axially relative to the first housing 111, the evacuation port 23a of the evacuation tube fixing seat 23 moves along the groove 111a, the outer surface of the first housing 111 is provided with a scale area 111b, and the scale area 111b corresponds to the groove 111a and is used for indicating the movement position of the evacuation port 23 a. So that the axial displacement of the second tube member 22 relative to the first tube member 21 can be known from the displacement position of the evacuation port 23 a.

It should be noted that the evacuation port 23a of the evacuation tube holder 23 is used for externally connecting a vacuum device to evacuate the second tube 22.

As shown in fig. 7 and 11, the proximal end of the transmission member 113 is provided with an end cover 113b, and the emptying tube fixing seat 23 is fixed in the end cover 113b, so that the transmission member 113 is connected with the second tube member 22 in the emptying tube fixing seat 23, and thus the transmission member 113 drives the second tube member 22 to axially move when moving. The evacuation port 23a of the evacuation tube holder 23 is exposed from the end cap 113b to be connected to an external vacuum device.

Further, the emptying pipe fixing seat 23 is provided with a sealing ring 24. Specifically, the sealing ring 24 is stably tightly abutted with the emptying pipe fixing seat 23 through the positioning seat 25, so that the sealing ring 24 has good sealing performance, and the emptying operation of the second pipe fitting 22 is facilitated.

In some embodiments, the end cover 113b is provided with a stop collar 26, and the stop collar 26 is used for limiting the positioning seat 25 on the emptying pipe fixing seat 23, so as to prevent the positioning seat 25 from falling off or loosening from the emptying pipe fixing seat 23, so as to effectively ensure the positioning effect of the positioning seat 25 on the sealing ring 24, and improve the sealing performance. The stop collar 26 may be fastened to the end cap 113b, may be screwed to the end cap 113b, or may be bonded to the end cap 113b by glue, which is not described herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

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

Claims (11)

1. A control handle for controlling first pipe fitting and second pipe fitting axial displacement, the movable cover of second pipe fitting is located the periphery of first pipe fitting, its characterized in that, control handle includes:

a first operation part which is used for being connected with the first pipe fitting and the second pipe fitting and controlling the second pipe fitting to move along the axial direction relative to the first pipe fitting;

the second operation portion is connected with the first operation portion, the second operation portion includes main part and with the locking switch that the main part is connected, the main part correspond the locking switch's position forms the locking position, the locking switch is used for with first operation portion axial limit is located the locking position, just the locking switch can be released to the locking of first operation portion, when the locking switch is released to the locking of first operation portion, first operation portion can be relative the second operation portion is along axial displacement.

2. The control handle according to claim 1, wherein the first operation portion includes a first housing, a guide tube, a transmission member, and a rotation member, the guide tube is connected to the first housing, the transmission member is axially movable in the guide tube and circumferentially limited to the guide tube, the transmission member is configured to be connected to the second tube, the rotation member is rotatably sleeved on an outer periphery of the guide tube and axially limited to the guide tube, the rotation member is in threaded engagement with the transmission member, and when the rotation member rotates around the guide tube, the transmission member is axially movable relative to the guide tube under the threaded transmission of the rotation member.

3. The control handle according to claim 2, wherein the rotating member comprises a threaded tube having an internal thread, the transmitting member has a thread engaging portion, the guide tube is provided with a clearance groove, and the thread engaging portion passes through the clearance groove and is threadedly engaged with the internal thread.

4. A control handle according to claim 3, wherein the clearance groove is parallel to the axial direction of the transmission member and is adapted to circumferentially constrain the threaded engagement portion to the guide tube, the threaded tube driving the threaded engagement portion to move along the guide groove as the threaded tube rotates about the guide tube.

5. The control handle of claim 2, wherein the first operating portion includes a sleeve axially limited to the first housing, the sleeve has a first engagement portion, the body portion includes a second housing, the lock switch is movably coupled to the second housing, the lock switch has a second engagement portion, the sleeve is axially movable relative to the second housing, and when the first operating portion is in the locked position, the sleeve is received in the second housing and the first engagement portion is engageable with the second engagement portion to limit axial movement of the sleeve relative to the second housing.

6. The control handle according to claim 5, wherein the proximal end of the guide tube is provided with a first limiting portion, the sleeve is sleeved on the guide tube and is formed with a second limiting portion, and the rotating member is axially limited between the first limiting portion and the second limiting portion.

7. The control handle of claim 6, wherein the guide tube is provided with a threaded section on a circumferential side thereof, and wherein the proximal end of the hub mates with the threaded section.

8. The control handle of claim 6, wherein a snap connection is connected to an outer side of the first limit portion, the snap connection being snap-connected to the first housing.

9. The control handle according to claim 5, wherein an elastic member is disposed between the locking switch and the second housing, the elastic member is configured to drive the locking switch to move in a resetting manner relative to the second housing, and when the first engaging portion moves to be opposite to the second engaging portion, the elastic member makes the first engaging portion cooperate with the second engaging portion.

10. The control handle according to claim 5, wherein the proximal end of the second tube is connected to an evacuation tube holder, the first housing is provided with a groove, the evacuation port of the evacuation tube holder moves along the groove when the second tube moves axially relative to the first housing, and the outer surface of the first housing is provided with a scale area corresponding to the groove and used for indicating the movement position of the evacuation port.

11. A delivery system comprising a catheter assembly and a control handle according to any one of claims 1-10, wherein the proximal end of the catheter assembly is connected to the control handle, and wherein the control handle is adapted to actuate axial movement of the catheter assembly.

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