CN118001549A - Delivery sheath - Google Patents

Abstract

The invention provides a conveying sheath, which comprises an operating handle, a bending sheath tube and a first bending wire, wherein the bending sheath tube comprises a first bending section, the operating handle comprises a first bending component, the first bending component comprises a sleeve and a screw rod, the sleeve comprises an outer sleeve layer, an inner sleeve layer and a proximal sleeve connecting part, the inner sleeve layer is arranged in the outer sleeve layer, the outer sleeve layer and the inner sleeve layer are connected through the proximal sleeve connecting part, the inner sleeve layer is sleeved on the bending sheath tube, at least the proximal end of the screw rod is arranged between the outer sleeve layer and the inner sleeve layer in a penetrating manner and can move along the axial direction of the sleeve, the proximal end of the first bending wire is connected with the screw rod, and the distal end of the first bending wire is connected with the first bending section. The conveying sheath tube is fixed with the bending adjusting sheath tube on one hand, a space for screw movement is provided on the other hand, the movement of the screw can be limited, the bending stability of the first bending adjusting section pulled by the first bending adjusting wire is ensured, and the operability of the conveying sheath handle is improved. Meanwhile, elements in the whole handle are simple, and the interior of the handle is compact in design.

Description

Delivery sheath

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to a conveying sheath.

Background

To accommodate different uses and anatomical morphology of a particular lesion, the distal end of the sheath is often preformed into different curved shapes. When in use, medical staff can observe the lesion position under the assistance of medical imaging equipment such as DSA, ultrasound and the like, then different pre-shaping sheaths are selected, and generally, due to the observation error and individual difference, the proper shape of the sheath is difficult to select at one time. When such problems occur, the healthcare worker often needs to withdraw the sheath while selecting another shape of sheath again for surgery. This requires the hospital to stock a large number of different types of sheaths having different shapes and angles, thereby increasing costs. Meanwhile, the damage to the blood vessel of the patient and the increase of the operation risk can be caused in the process of repeatedly selecting the sheath, and meanwhile, the time of interventional operation and the time of the patient and medical staff to contact radiation are prolonged. Based on the above, a sheath having a distal end adjustable in angle has been developed in recent years, and the distal end of the sheath is adjusted in various shapes and sizes by a handle outside the body. The existing adjustable bent sheath handle is complex in structure and high in manufacturing cost.

Disclosure of Invention

The invention aims to at least solve the problem that the handle of the bending sheath tube is too complex. This object is achieved by:

A conveying sheath comprises an operating handle, a bending sheath tube and a first bending wire, wherein the bending sheath tube comprises a first bending section, the operating handle comprises a first bending component, the first bending component comprises a sleeve and a screw rod,

The sleeve comprises a sleeve outer layer, a sleeve inner layer and a sleeve proximal end connecting part, wherein the sleeve inner layer is arranged in the sleeve outer layer, the sleeve outer layer and the sleeve inner layer are connected through the sleeve proximal end connecting part, the sleeve inner layer is sleeved on the sheath tube, at least the proximal end of the screw rod is arranged between the sleeve outer layer and the sleeve inner layer in a penetrating way and can move along the axial direction of the sleeve relative to the sleeve proximal end connecting part,

The proximal end of the first bending wire is connected with the screw rod, and the distal end of the first bending wire is connected with the first bending section.

According to the conveying sheath, through setting up special sleeve structure, specifically, the sleeve includes the sleeve skin, sleeve inlayer and sleeve proximal end connecting portion, the sleeve inlayer sets up in the sleeve skin, sleeve skin and sleeve inlayer pass through sleeve proximal end connecting portion and connect, sleeve inlayer cover is established on the sheath pipe, the screw rod is worn to establish between sleeve skin and sleeve inlayer and can follow telescopic axial direction and remove at least proximal end, realize with the fixed of accent curved sheath pipe on the one hand, on the other hand provides the space of screw rod motion, and can restrict the motion of screw rod, guaranteed the first stability of transferring curved section bending of curved silk pulling of first accent, improve the operability of conveying sheath handle. Meanwhile, elements in the whole handle are simple, and the interior of the handle is compact in design.

Further, the first bending adjustment assembly further comprises a first knob assembly, wherein the first knob assembly is sleeved outside the screw rod and used for driving the screw rod to move along the axial direction of the sleeve.

Further, the screw comprises a first screw part and a second screw part which can move relatively in the axial direction, the first screw part and the second screw part are surrounded to form a cylindrical structure with external threads, the first screw part and the second screw part can be connected with the first bending section through one first bending wire respectively, a first thread section is arranged on the first screw part, a second thread section is arranged on the second screw part, the thread pitches of the first thread section and the second thread section are equal and the rotation directions are opposite, and the threads of the first thread section are in butt joint with the threads of the second thread section;

The inner wall surface of the first knob assembly is provided with a first internal thread and a second internal thread, the first internal thread and the second internal thread are arranged in a crossing manner, the first internal thread is in transmission connection with the first thread section, and the second internal thread is in transmission connection with the second thread section.

Further, the first screw portion and the second screw portion are respectively connected with different circumferential or different axial positions of the first bending section through one first bending wire.

Further, the inner wall surface of the sleeve outer layer is provided with at least one first plane part, the first plane parts respectively extend along the axial direction of the sleeve outer layer, the outer wall surface of the screw rod is provided with at least one second plane part, and the second plane part extends along the axial direction of the screw rod and is attached to the first plane part.

Further, the first knob assembly comprises a first knob and a nut, the first knob is connected with the nut and drives the nut to rotate together, the nut is sleeved outside the screw, and the nut is connected with the screw through thread transmission.

Further, the delivery sheath further comprises a second bending wire, the bending sheath tube further comprises a second bending section, the operating handle further comprises a second bending component, and the proximal end of the bending sheath tube sequentially penetrates through the first bending component and the second bending component.

Further, the second bending component comprises a sliding block, the sliding block can be connected with the second bending section through the second bending regulating wire, and the sliding block moves along the axial direction of the operating handle and can abut against or be adjacent to the proximal end of the sleeve.

Further, the second bending component further comprises a guide component, the guide component comprises at least one guide rod, the distal end of the guide rod is connected with the proximal end of the sleeve, the sliding block penetrates through the guide rod, and the sliding block slides on the guide rod.

Further, the sleeve further comprises a proximal opening, the proximal opening is arranged at the proximal connecting part of the sleeve, and the distal end of the guide rod extends into the proximal opening and is clamped in the proximal opening.

Further, the second bending component further comprises a second knob, an external thread is arranged on the outer surface of the sliding block, the second knob is sleeved outside the sliding block, an internal thread is arranged on at least part of the inner wall surface of the second knob, and the internal thread of the second knob is in transmission connection with the external thread of the sliding block.

Further, the first bending component also comprises a first knob component which is sleeved outside the screw rod and used for driving the screw rod to move along the axial direction of the sleeve,

The operating handle further comprises at least one first locating pin, a part of the structure of the first knob assembly is inserted into the second knob and provided with a first locating groove, the first locating pin penetrates through the second knob and is inserted into the first locating groove, and the first locating groove can rotate relative to the first locating pin.

Further, the operating handle further comprises a shell and at least one second locating pin, a part of the second knob is inserted into the shell and is provided with a second locating groove, the second locating pin penetrates through the shell and is inserted into the second locating groove, and the second locating groove can rotate relative to the second locating pin.

Further, the first bending section is disposed at the distal end of the bending sheath, the second bending section is disposed between the proximal end of the bending sheath and the first bending section, the first bending section is capable of bending in a first plane, and the second bending section is capable of bending in a second plane, wherein the first plane intersects the second plane.

Further, the first bending section and the second bending section are the same bending section.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

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

FIG. 1 is a schematic view of the overall structure of a delivery sheath according to an embodiment;

FIG. 2 is a schematic view of the bending sheath of FIG. 1;

FIG. 3 is an exploded view of the delivery sheath of FIG. 1;

FIG. 4 is a schematic view of another angle configuration of the delivery sheath of FIG. 1;

FIG. 5 is a schematic view of the cross-sectional A-A configuration of the delivery sheath of FIG. 4;

FIG. 6 is a schematic view of a cross-sectional B-B configuration of the delivery sheath of FIG. 4;

FIG. 7 is a schematic view of a portion of the delivery sheath of FIG. 1 with a portion of the housing removed;

FIG. 8 is a schematic view of a portion of the delivery sheath of FIG. 7 with the primary and secondary knobs removed;

FIG. 9 is a schematic view of a portion of the delivery sheath of FIG. 7 with the second knob removed;

FIG. 10 is a schematic view of a portion of the delivery sheath of FIG. 8 with the nut, slider and housing removed;

FIG. 11 is a schematic view of a portion of the delivery sheath of FIG. 10 after removal of the sleeve;

FIG. 12 is a schematic view of the relative positions of the first knob and the screw of FIG. 9;

FIG. 13 is a schematic view of a C-C cross-sectional structure of the first knob of FIG. 12;

fig. 14 is a schematic view of the first nut portion of fig. 13;

fig. 15 is a schematic view of the structure of the second nut portion in fig. 13;

FIG. 16 is a schematic view of the relative positions of the first knob and the second knob in FIG. 7;

FIG. 17 is a schematic view of a sleeve according to an embodiment;

FIG. 18 is a schematic view of another view of a sleeve according to one embodiment;

FIG. 19 is a schematic view of a sleeve according to another embodiment;

FIG. 20 is a schematic view of the cross-sectional structure A-A of FIG. 19;

FIG. 21 is a schematic view of the first housing of FIG. 7;

Fig. 22 is a schematic view of the external structure of the operating handle in fig. 1.

Detailed Description

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

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

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

For purposes of more clarity in describing the structure of the present application, the terms "proximal" and "distal" are defined herein as terms commonly used in the interventional medical arts. Specifically, "distal" means an end far from the operator during a surgical operation, "proximal" means an end near the operator during a surgical operation, "axial" means a length direction thereof, and "radial" means a direction perpendicular to the "axial".

Referring to fig. 1 and 2, the present embodiment provides a delivery sheath 1, where the delivery sheath 1 includes an operation handle 10, a bending sheath 20, a first bending wire 31 and a second bending wire 32, a proximal end of the bending sheath 20 is connected to the operation handle 10, and two ends of the first bending wire 31 and the second bending wire 32 are respectively connected to the operation handle 10 and the bending sheath 20, and the operation handle is used for bending the bending sheath 20.

Wherein the bending sheath 20 comprises a first bending section 21 and a second bending section 22. The first bending section 21 and the second bending section 22 are each bendable in a radial direction, thereby effecting an angular change of the distal end of the bending sheath 20. The first bending section 21 is disposed at the distal end of the bending sheath 20, and the second bending section 22 is disposed between the first bending section 21 and the proximal end of the bending sheath 20, so as to realize segmented bending of the bending sheath 20, make the bending sheath 20 more flexible and suitable for more complex physiological anatomy structure, and further convey the instrument to the target position that is difficult to reach by the common sheath.

Specifically, the first bending wire 31 and the second bending wire 31 may be made of nitinol wires, and the first bending section 21 and the second bending section 22 may be cut into a corrugated tube from nitinol tube, which can provide good supporting force and can be bent in any direction.

In some embodiments of the present invention, a plurality of bending wire channels are disposed in the side wall of the bending sheath tube 20 at intervals along the circumferential direction, the first bending wire 31 and the second bending wire 32 are respectively disposed in the bending wire channels in a penetrating manner, and the inner wall surface of the bending wire channels is provided with a PTFE lining tube, so that the resistance of the first bending wire 31 and the second bending wire 32 during bending can be reduced due to good lubrication characteristics.

Referring to fig. 1 and 3, the operating handle 10 includes a first bending adjustment assembly 12 and a second bending adjustment assembly 13, the first bending adjustment assembly 12 being connectable to the first bending adjustment section 21 by a first bending adjustment wire 31, and the second bending adjustment assembly 13 being connectable to the second bending adjustment section 22 by a second bending adjustment wire 32.

The operating handle 10 further includes a housing 11, and an interior of the housing 11 forms a mounting cavity for mounting the first bending adjustment assembly 12 and the second bending adjustment assembly 13, through which the bending adjustment sheath 20 passes.

The first bending section 21 is connected with the first bending component 12 through a first bending wire 31, and can bend along a first plane under the action of the first bending component 12, when the action of the first bending component 12 is removed, the first bending section 21 can restore to the original appearance, the second bending section 22 is connected with the second bending component 13 through a second bending wire 32, and can bend along a second plane, when the action of the second bending component 13 is removed, the second bending section 22 can restore to the original appearance, and the first plane and the second plane are intersected, so that the bending sheath tube 20 can be simultaneously bent along different planes through the operation handle 10, the normal implementation process of an operation is ensured, the puncture efficiency is improved, and the damage to a patient is reduced. In some embodiments, to accurately adjust the distal bending condition of the bending sheath 20, the first plane is perpendicular to the second plane, i.e., the planes in which the bending directions of the first bending section 21 and the second bending section 22 are perpendicular. In the present embodiment, the first bending section 21 and the second bending section 22 are disposed at intervals in the axial direction, and the first bending section 21 and the second bending section 22 can be bent along different planes. In other embodiments, the first bending section 21 and the second bending section 22 can be bent along the same plane; or the first bending section 21 and the second bending section 22 are the same bending section, and the first bending wire 31 and the second bending wire 32 are connected at the same position or different positions of the same bending section.

In other embodiments, the delivery sheath 1 includes only the first turndown wire 31, the first turndown section 21, the first turndown assembly 12, and no second turndown wire 32, the first turndown section 22, the first turndown assembly 13.

In some embodiments, to facilitate the assembly and disassembly of the internal components of the housing 11, the housing 11 includes a first housing 111 and a second housing 112 that are disposed opposite to each other, and the first housing 111 and the second housing 112 may be detachably connected. For ease of fabrication, in some embodiments, the first housing 111 is configured to be identical and symmetrical to the second housing 112. In other embodiments, the housing 11 may be of unitary design, not including the first housing and the second housing. In other embodiments, the operating handle 10 may not include the housing 11.

As shown in connection with fig. 3-8, in some embodiments of the present invention, the first buckle assembly 12 includes a sleeve 121, a threaded rod 122, and a first knob assembly 1234. Wherein, sleeve 121 locates the inside of casing 11, and the inside of sleeve 121 is equipped with holds the chamber, and the proximal end of screw rod 122 wears to locate to hold the chamber and can follow sleeve 121's axial direction and remove, and screw rod 122 can link to each other with first accent bend section 21 through first accent bend wire 31, and the outside of screw rod 122 is located to first knob subassembly 1234 cover for drive screw rod 122 is followed sleeve 121's axial direction and is removed. In other embodiments, first buckle assembly 12 may not include first knob assembly 1234, it being understood that when first knob assembly 1234 is not included, screw 122 may be manually controlled to move within sleeve 121.

Specifically, the sleeve 121 has a tubular structure with an opening at a distal end, and a proximal end of the screw 122 penetrates through the distal opening of the sleeve 121 and penetrates into the sleeve 121, and a distal end of the screw 122 is disposed outside the sleeve 121 and connected to the first knob assembly 1234, and the first knob assembly 1234 is used for driving the screw 122 to move along an axial direction of the sleeve 121. Since the screw 122 is connected to the first bending section 21 through the first bending wire 31, the screw 122 pulls the first bending wire 31 while moving along the axial direction of the sleeve 121, thereby achieving the purpose of bending the first bending section 21. Wherein, when the screw rod 122 moves towards the proximal end of the operation handle 10, the first bending wire 31 is pulled and the first bending section 21 is bent, and when the screw rod 12 moves towards the distal end of the operation handle 10, the first bending wire 31 is released and the first bending section 21 is gradually restored to the original appearance.

Referring to fig. 9 to 13, in some embodiments of the present invention, the screw 122 includes a first screw portion 1221 and a second screw portion 1222 that are axially movable relative to each other, the first screw portion 1221 and the second screw portion 1222 are surrounded by a cylindrical structure having external threads, the first screw portion 1221 and the second screw portion 1222 can be connected to distal ends of the first bending section 21 by a first bending wire 31, a first thread section 12211 is provided on the first screw portion 1221, a second thread section 12221 is provided on the second screw portion 1222, and the thread pitch of the first thread section 12211 is equal to and opposite to that of the second thread section 12221, and the threads of the first thread section 12211 are in butt joint with those of the second thread section 12221.

Referring to fig. 14 and 15, the inner wall surface of the first knob assembly 1234 is provided with a first internal thread 1243 and a second internal thread 1244, the first internal thread 1243 and the second internal thread 1244 are disposed to intersect, the first internal thread 1243 is in driving connection with the first thread segment 12211, and the second internal thread 1244 is in driving connection with the second thread segment 12221.

Specifically, in some embodiments of the present application, the screw 122 comprises a two-part structure of a first screw portion 1221 and a second screw portion 1222, the cross sections of the first screw portion 1221 and the second screw portion 1222 are both semicircular ring structures, and the first screw portion 1221 and the second screw portion 1222 enclose a cylindrical structure with external threads. The first screw portion 1221 and the second screw portion 1222 are disposed in contact with each other only in the radial direction, but are not connected to each other, so that the first screw portion 1221 and the second screw portion 1222 can move in the axial direction of the sleeve 121, respectively. And, since the first screw portion 1221 and the second screw portion 1222 are connected to the first bending section 21 through one first bending wire 31, respectively, the first screw portion 1221 and the second screw portion 1222 can drive the first bending section 21 to bend, respectively.

In some embodiments of the application, the pitch of the first thread segments 12211 on the first screw portion 1221 and the second thread segments 12221 on the second screw portion 1222 are equal and opposite in rotation, wherein the first thread segments 12211 may be left-handed and the second thread segments 12221 may be right-handed. Accordingly, the inner wall surface of the first knob assembly 1234 is provided with a first internal thread 1243 and a second internal thread 1244, the first internal thread 1243 is in driving connection with the first thread section 12211, the second internal thread 1244 is in driving connection with the second thread section 12221, when the first knob assembly 1234 is rotated in one direction, for example, clockwise, the first internal thread 1243 is in driving connection with the first thread section 12211 and drives the first screw rod portion 1221 to move towards the proximal end of the sleeve 121, and at this time, the second internal thread 1244 is in driving connection with the second thread section 12221 and drives the second screw rod portion 1222 to move towards the distal end of the sleeve 121, thereby realizing that the first bending section 21 bends towards the first direction. When the first knob assembly 1234 is turned in the other direction, e.g., counter-clockwise, the first internal thread 1243 is drivingly connected to the first threaded section 12211 and drives the first threaded portion 1221 toward the distal end of the sleeve 121, while the second internal thread 1244 is drivingly connected to the second threaded section 12221 and drives the second threaded portion 1222 toward the proximal end of the sleeve 121, thereby effecting bending of the first bending section 21 in the second direction. Wherein the first direction and the second direction are opposite.

By providing first and second thread segments 12211 and 12221 having opposite threads and simultaneously mating first and second thread segments 12211 and 12221 with first knob assembly 1234, simultaneous forward and backward movement of first and second screw portions 1221 and 1222 can be achieved while rotating first knob assembly 1234, thereby achieving bi-directional bending of first bending section 21. Meanwhile, since the first screw portion 1221 and the second screw portion 1222 are disposed opposite to each other in the radial direction and move in opposite directions in synchronization, the first screw portion 1221 and the second screw portion 1222 have an overlapping area in the axial direction, thereby shortening the overall axial length dimension of the first adjustment assembly 12, reducing the length dimension of the operating handle 10, and facilitating portability and operation.

Meanwhile, the screw 122 and the first knob assembly 1234 in the application are more reliably driven by the self-locking characteristic of the screw drive, so that the angle of the bent distal end of the bending sheath 20 is ensured to be fixed, and the failure of the operation process caused by the angle change of the bending sheath 20 is avoided.

In this embodiment, the first screw portion 1221 and the second screw portion 1222 may be respectively connected to different circumferential positions of the first bending section 21 through one first bending wire 31, so that the first screw portion 1221 and the second screw portion 1222 can respectively drive the first bending section 21 to perform bidirectional bending. In other embodiments, the first screw portion 1221 and the second screw portion 1222 may be connected to different axial positions of the first bending section 21 through one first bending wire 31, so that the first screw portion 1221 and the second screw portion 1222 may respectively drive different positions of the first bending section 21 to bend.

Referring to fig. 8 to 15, in some embodiments of the present invention, the first knob assembly 1234 includes a first knob 123 and a nut 124, the first knob 123 is connected with the nut 124 and drives the nut 124 to rotate together, at least a portion of the first knob 123 is disposed outside the housing 11, the nut 124 includes a first nut portion 1241 and a second nut portion 1242, the first nut portion 1241 and the second nut portion 1242 are surrounded in a ring structure and are sleeved outside the screw 122, a portion of the first internal thread 1243 and a portion of the second internal thread 1244 are disposed on an inner wall surface of the first nut portion 1241, and another portion of the first internal thread 1243 and another portion of the second internal thread 1244 are disposed on an inner wall surface of the second nut portion 1242.

Specifically, the first knob assembly 1234 includes the first knob 123 and the nut 124 that are detachably connected, and the specific connection manner may be glue or clamping, so as to facilitate the processing and assembly of the first knob assembly 1234. Meanwhile, in order to facilitate sleeving the nut 124 on the outside of the screw 122 and processing and manufacturing the first internal thread 1243 and the second internal thread 1244 on the inner wall surface of the nut 124, the nut 124 also includes a two-part structure of detachable connection, namely a first nut part 1241 and a second nut part 1242, and specifically, the first nut part 1241 and the second nut part 1242 may be connected by adopting a cementing or clamping manner. Wherein, the inner wall surface of the first nut portion 1241 is provided with a part of first internal threads 1243 and a part of second internal threads 1244 which are arranged in a crossing way, the inner wall surface of the second nut portion 1242 is provided with another part of first internal threads 1243 and another part of second internal threads 1244 which are arranged in a crossing way, so that after the first nut portion 1241 and the second nut portion 1242 are assembled into the nut 124, the inner wall surface of the nut 124 is provided with the first internal threads 1243 and the second internal threads 1244 which are arranged in a complete crossing way, and when the first knob 123 and the nut 124 are rotated, the first internal threads 1243 are in transmission fit with the first thread section 12211, and the second internal threads 1244 are in transmission fit with the second thread section 12221, thereby realizing synchronous reverse movement of the first screw portion 1221 and the second screw portion 1222 and bidirectional bending adjustment of the first bending section 21. In other embodiments, the nut 124 is of unitary design, not including separate first and second nut portions 1241, 1242.

As shown in fig. 10 and 11 in combination, in some embodiments of the present invention, the inner wall surface of the sleeve 121 is provided with two first flat portions (see 1214 in fig. 17) which extend in the axial direction of the sleeve 121, respectively, and the outer wall surface of the first screw portion 1221 and the outer wall surface of the second screw portion 1222 are provided with one second flat portion 12222, respectively, which extend in the axial direction of the screw 122 and are in contact with the first flat portions.

Specifically, the two first flat portions are disposed opposite to each other at 180 ° intervals along the inner wall surface of the sleeve 121, and the second flat portions 12222 on the first screw portion 1221 and the second flat portions 12222 on the second screw portion 1222 are disposed opposite to each other at 180 ° intervals along the outer peripheral surface of the screw 122, so that when the screw 122 is inserted into the sleeve 121, the two second flat portions 12222 respectively engage with the two first flat portions and are movable in the axial direction, thereby ensuring that the first screw portion 1221 and the second screw portion 1222 move in the axial direction of the sleeve 121, and that rotation about the circumferential direction of the sleeve 121 does not occur during the movement. In other embodiments, the number of first planar portions may be one or more, and in cooperation, the number of second planar portions may be one or more.

As shown in fig. 3, 5, 7, 8 and 9, in some embodiments of the present invention, the second bending assembly 13 includes a second knob 131 and a slider 132, at least a portion of the second knob 131 is disposed outside the housing 11, the slider 132 is disposed inside the housing 11, an external thread is disposed on an outer surface of the slider 132, the second knob 131 is sleeved outside the slider 132, and at least a portion of an inner wall surface of the second knob 131 is provided with an internal thread, and the internal thread of the second knob 131 is in driving connection with the external thread of the slider 132. In other embodiments, the second buckle assembly 13 may not include the second knob 131.

Wherein, the slider 132 moves along the axial direction of the operating handle and can be abutted against or adjacent to the proximal end of the sleeve 121, so that the movement area of the slider 132 is conveniently limited, the sleeve 121 can also play a role of separating two bending elements, the elements in the whole handle are simple, the design inside the handle is compact, the whole length of the handle can not be too long, and the operability of the handle of the conveying sheath is improved.

Specifically, the second knob 131 is a cylindrical structure with two open ends, the proximal end of the second knob 131 is disposed in the housing 11 and provided with an internal thread, and the slider 132 is disposed in the second knob 131 and provided with an external thread matching the internal thread. The distal end of the second knob 131 is disposed outside the housing 11 and is used for operating and rotating, and by rotating the second knob 131, the slider 132 is in threaded transmission with the second knob 131, so that the slider 132 moves along the axial direction of the housing 11, and simultaneously, the slider 132 drives the distal end of the second bending section 22 to move through the second bending wire 32, so as to realize bending adjustment of the second bending section 22.

Referring to fig. 3, 9, 12 and 16, in some embodiments of the present invention, the operating handle 10 further includes at least one first positioning pin 141, a part of the first knob assembly 1234 is inserted into the second knob 131 and provided with a first positioning slot 1231, the first positioning pin 141 passes through the second knob 131 and is inserted into the first positioning slot 1231, and the first positioning slot 1231 can rotate relative to the first positioning pin 141. In this embodiment, the partial structure of the first knob assembly 1234 is inserted into the second knob 131 in such a way that the inner wall of the second knob 131 has a stopper, the proximal end of the first knob assembly 1234 abuts against the stopper, and then the first positioning pin 141 is used to axially fix the first knob assembly 1234 and the second knob 131.

Specifically, the proximal end of the first knob 123 is inserted into the second knob 131, and the distal end of the first knob 123 extends outside the second knob 131, thereby facilitating the rotation of the first knob 123 and the second knob 131. The first knob 123 and the second knob 131 are adjacently disposed, and the outer surfaces are respectively provided with a protrusion portion for easy manipulation. The first knob 123 and the second knob 131 are adjacently arranged, so that the first knob 123 and the second knob 131 can be controlled by one hand. Wherein, the outer circumferential surface of the structure that the first knob 123 is inserted into the second knob 131 is provided with a first positioning groove 1231, and the first positioning pin 141 passes through the second knob 131 and is inserted into the first positioning groove 1231, thereby limiting the axial movement of the first knob 123. In the present embodiment, the number of the first positioning pins 141 is two, and the two first positioning pins 141 are symmetrically disposed, so that the first knob 123 can be prevented from tilting on one side due to an assembly error. In other embodiments, the number of first positioning pins 141 may be 1 or more.

In some embodiments of the present invention, to ensure the normal rotation of the first knob 123, the first positioning groove 1231 may be a complete annular groove, or a partial annular groove, and to ensure that the first positioning groove 1231 can rotate with respect to the first positioning pin 141.

As shown in fig. 3, 7, 9, 16 and 21, in some embodiments of the present invention, the operating handle 10 further includes at least one second positioning pin 142, a part of the second knob 131 is inserted into the housing 11 and provided with a second positioning slot 1311, the second positioning pin 142 passes through the housing 11 and is inserted into the second positioning slot 1311, and the second positioning slot 1311 can rotate relative to the second positioning pin 142.

Specifically, the proximal end of the second knob 131 is inserted into the housing 11, and the distal end of the second knob 131 protrudes outside the housing 11, thereby facilitating the rotation of the second knob 131. Wherein, the first housing 111 is provided with an insertion hole 1112, when the second knob 131 is inserted into the housing 11, the insertion hole 1112 and the second positioning slot 1311 are correspondingly disposed, and the second positioning pin 142 passes through the insertion hole 1112 and is inserted into the second positioning slot 1311, so as to position the axial direction of the second knob 131, and the second knob 131 can only rotate around the axial direction.

Referring again to fig. 5,8 and 21, in some embodiments of the present invention, the inner wall surface of the housing 11 is provided with at least one mounting protrusion 1111, and the mounting protrusion 1111 abuts against the outer wall surface of the second knob 131 and is used to support the second knob 131 for rotation.

Because the second knob 131 is sleeved outside the slider 132, and the slider 132 is sleeved outside the bending sheath 20, in order to reduce the compression of the second knob 131 to the bending sheath 20 and prevent the bending sheath 20 from being radially deformed by extrusion, at least one mounting protrusion 1111 is provided on the inner wall surface of the housing 11 for supporting the second knob 131 and ensuring that the second knob 131 can rotate relative to the housing 11. Wherein, the number of the mounting protrusions 1111 may be plural, and the plurality of mounting protrusions 1111 are disposed at intervals along the axial direction of the housing 11, so as to increase the stress area of the second knob 131, and the first housing 111 and the second housing 112 may be respectively provided with a plurality of mounting protrusions 1111, which are respectively disposed in one-to-one correspondence.

Referring again to fig. 3, 8-11, in some embodiments of the present invention, the operating handle 10 further includes a guide assembly 15, the guide assembly 15 including at least one guide rod, a proximal end of the guide rod being coupled to the housing 11, a distal end of the guide rod being coupled to a proximal end of the sleeve 121, and the guide rod passing through the slider 132 and sliding relative to the slider 132.

Specifically, the guide rod is disposed in the axial direction of the housing 11 and penetrates the slider 132, thereby ensuring that the slider 132 moves in the axial direction of the guide rod. Meanwhile, in order to prevent the slider 132 from rotating during the movement, the number of the guide rods may be two, and the two guide rods are respectively disposed along the axial direction of the housing 11 and pass through the slider 132, thereby restricting the rotation of the slider 132.

In some embodiments, the guide assembly 15 includes a first guide rod 151, a second guide rod 152 and a third guide rod 153, where the first guide rod 151 is sleeved outside the bending sheath 20, and the slider 132 is sleeved outside the first guide rod 151, so that the slider 132 and the bending sheath 20 are separated by the first guide rod 151, and the slider 132 is ensured to be capable of axially moving relative to the bending sheath 20, so as to adjust the distal bending degree of the bending sheath 20, and meanwhile, the slider 132 cannot directly contact and rub with the outer wall surface of the bending sheath 20, so as to avoid damage to the bending sheath 20. The second guide rod 152 and the third guide rod 153 are respectively disposed at two radial sides of the first guide rod 151, the proximal end of the second guide rod 152 and the proximal end of the third guide rod 153 are respectively connected with the housing 11, the distal end of the second guide rod 152 and the distal end of the third guide rod 153 respectively pass through the slider 132, so that the rotation of the slider 132 is limited, and the second guide rod 152 and the third guide rod 153 can provide enough bending resistance, and can resist and offset the pulling force when the slider 132 pulls the second bending wire, so that the guide assembly 15 is prevented from bending. In one embodiment, the distal end of the second guide rod 152 and the third guide rod 153 may be made of a relatively rigid material such as stainless steel.

Further, the distal end of the second guide rod 152 and the distal end of the third guide rod 153 are respectively connected with the sleeve 121 after penetrating through the slider 132, so as to fix the position of the sleeve 121, prevent the sleeve 121 from generating axial transmission and axial movement, and avoid affecting the bending process of the first bending section 21.

In this embodiment, referring to fig. 17 to 20, the sleeve 121 includes a sleeve outer layer 1210, a sleeve inner layer 1211 and a sleeve proximal end connecting portion 1212, the sleeve inner layer 1211 is disposed in the sleeve outer layer 1210, the sleeve outer layer 1210 and the sleeve inner layer 1211 are connected by the sleeve proximal end connecting portion 1212, the sleeve inner layer 1211 is sleeved on the bending sheath 20, and the screw 122 is at least proximally disposed between the sleeve outer layer 1210 and the sleeve inner layer 1211 and is movable in an axial direction of the sleeve 121 relative to the sleeve proximal end connecting portion 1212. Through setting up special sleeve structure, on the one hand realize with transfer the fixed of curved sheath pipe 20, on the other hand provide the space of screw rod 122 motion to can restrict the motion of screw rod 122, guarantee the first stability of transferring curved section crooked of first accent of curved silk 31 pulling, improve the operability of carrying the sheath handle. Meanwhile, elements in the whole handle are simple, and the interior of the handle is compact in design.

Further, sleeve 121 also includes proximal openings 1213, 1215, proximal opening 1213 being provided in sleeve proximal connector 1212, and the distal end of the guide rod extending into proximal openings 1213, 1215 and being captured within proximal openings 1213, 1215.

In this embodiment, the distal end of the first guide rod 151 is secured in a proximal opening 1213, and the distal end of the second guide rod 152 and the third guide rod 153 are secured in different proximal openings 1215, respectively. Wherein, the radial diameter of the proximal opening 1213 is larger than that of the sleeve inner layer 1211, the connection between the proximal opening 1213 and the sleeve inner layer 1211 forms a step structure 12131, and the distal end of the first guide rod 151 abuts against the step structure 12131 and is fixed by welding or cementing. Further, at least one small groove 12132 is further disposed on the hole wall of the proximal opening 1213, and a small protrusion corresponding to the small groove 12132 is disposed on the first guide rod 151, for limiting the first guide rod 151, so as to prevent the first guide rod 151 from rotating circumferentially.

As shown in fig. 21, the interior of the housing 11 is further provided with at least one mounting plate 1113, wherein fig. 21 shows only a part of the mounting plate 1113 in the first housing 111, and the part of the mounting plate 1113 in the second housing 112 corresponds to the mounting plate 1113 in the first housing 111 and is symmetrically arranged, and both together form the complete mounting plate 1113. The center position of the mounting plate 1113 is provided with a first mounting hole 1114, and both sides of the first mounting hole 1114 in the radial direction are respectively provided with a second mounting hole 1115, wherein the proximal end of the first guide rod 151 passes through the first mounting hole 1114 and is fixed, and the proximal ends of the second guide rod 152 and the third guide rod 153 pass through the second mounting holes 1115 on both sides and are fixed, respectively, so that the first guide rod 151, the second guide rod 152 and the third guide rod 153 are fixed, respectively, by the mounting plate 1113. The number of the mounting plates 1113 may be plural, and the plurality of mounting plates 1113 are disposed at intervals in the axial direction of the housing 11, thereby securing the fixing effect on the first guide lever 151, the second guide lever 152, and the third guide lever 153.

Referring again to fig. 3,5, and 7-11, in some embodiments of the present invention, the operating handle 10 further includes a joint assembly 16, and the joint assembly 16 is open at both ends and has a delivery passage therein. The joint assembly 16 is disposed at the proximal end of the operating handle 10, the proximal end of the joint assembly 16 is inserted into the housing 11 and connected to the proximal end of the bending sheath 20, thereby fixing the bending sheath 20, and the distal end of the joint assembly 16 is disposed in the housing 11 and used for connecting surgical components such as a loader or a hemostatic valve.

Referring again to fig. 1, 3, 5 and 22, in some embodiments of the present invention, the distal end of the first knob 123 is further provided with a front cover 17, and the distal opening of the first knob 123 is blocked by the front cover 17. In some embodiments of the present invention, the operating handle 10 further includes a rubber sleeve assembly 18, and the rubber sleeve assembly 18 is at least sleeved outside the housing 11, thereby serving to increase the feel of the operating handle 10 when in use. Specifically, the rubber sleeve assembly 18 includes a first rubber sleeve 181, a second rubber sleeve 182, and a third rubber sleeve 183, wherein the first rubber sleeve 181 is sleeved outside the first knob 123, the second rubber sleeve 182 is sleeved outside the second knob 131, and the third rubber sleeve 183 is sleeved outside the housing 11.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (15)

1. A conveying sheath comprises an operating handle, a bending sheath tube and a first bending wire, wherein the bending sheath tube comprises a first bending section, the operating handle comprises a first bending component, the first bending component comprises a sleeve and a screw rod,

The sleeve comprises a sleeve outer layer, a sleeve inner layer and a sleeve proximal end connecting part, wherein the sleeve inner layer is arranged in the sleeve outer layer, the sleeve outer layer and the sleeve inner layer are connected through the sleeve proximal end connecting part, the sleeve inner layer is sleeved on the bending sheath tube, at least the proximal end of the screw rod is arranged between the sleeve outer layer and the sleeve inner layer in a penetrating way and can move along the axial direction of the sleeve relative to the sleeve proximal end connecting part,

The proximal end of the first bending wire is connected with the screw rod, and the distal end of the first bending wire is connected with the first bending section.

2. The delivery sheath of claim 1, wherein the first buckle assembly further comprises a first knob assembly that is sleeved outside the screw and is configured to drive the screw to move in an axial direction of the sleeve.

3. The delivery sheath of claim 2, wherein the sheath comprises a sheath,

The screw comprises a first screw part and a second screw part which can move relatively in the axial direction, the first screw part and the second screw part are surrounded to form a cylindrical structure with external threads, the first screw part and the second screw part can be connected with the first bending section through a first bending wire respectively, a first thread section is arranged on the first screw part, a second thread section is arranged on the second screw part, the thread pitches of the first thread section and the second thread section are equal and the threads of the first thread section and the second thread section are opposite in rotation direction, and the threads of the first thread section are in butt joint with the threads of the second thread section;

The inner wall surface of the first knob assembly is provided with a first internal thread and a second internal thread, the first internal thread and the second internal thread are arranged in a crossing manner, the first internal thread is in transmission connection with the first thread section, and the second internal thread is in transmission connection with the second thread section.

4. A delivery sheath according to claim 3, wherein the first and second screw portions are connected to different circumferential or different axial positions of the first bending section by one of the first bending wires, respectively.

5. The delivery sheath of claim 1, wherein the inner wall surface of the sleeve outer layer is provided with at least one first planar portion extending in the axial direction of the sleeve outer layer, and the outer wall surface of the screw is provided with at least one second planar portion extending in the axial direction of the screw and abutting the first planar portion.

6. The delivery sheath of claim 2, wherein the first knob assembly comprises a first knob and a nut, the first knob is connected with the nut and drives the nut to rotate together, the nut is sleeved outside the screw, and the nut is connected with the screw through a threaded transmission.

7. The delivery sheath of claim 1, further comprising a second bend-regulating wire, the bend-regulating sheath further comprising a second bend-regulating section, the operating handle further comprising a second bend-regulating assembly, the proximal end of the bend-regulating sheath passing sequentially through the first bend-regulating assembly and the second bend-regulating assembly.

8. The delivery sheath of claim 7, wherein the second bending assembly comprises a slider connectable to the second bending section via the second bending wire, the slider being movable in an axial direction of the operating handle and being abuttable or adjacent to a proximal end of the sleeve.

9. The delivery sheath of claim 8, wherein the second bending assembly further comprises a guide assembly comprising at least one guide rod, a distal end of the guide rod being connected to a proximal end of the sleeve, and the slider being threaded onto the guide rod, the slider sliding on the guide rod.

10. The delivery sheath of claim 9, wherein the sleeve further comprises a proximal aperture disposed in the sleeve proximal connection, the distal end of the guide rod extending into and being retained in the proximal aperture.

11. The delivery sheath of claim 9, wherein the second bending assembly further comprises a second knob, an external thread is provided on an outer surface of the slider, the second knob is sleeved outside the slider, and at least a portion of an inner wall surface of the second knob is provided with an internal thread, and the internal thread of the second knob is in driving connection with the external thread of the slider.

12. The delivery sheath of claim 11, wherein the first buckle assembly further comprises a first knob assembly that is positioned about the exterior of the screw and is configured to drive the screw in an axial direction of the sleeve,

The operating handle further comprises at least one first locating pin, a part of the structure of the first knob assembly is inserted into the second knob and provided with a first locating groove, the first locating pin penetrates through the second knob and is inserted into the first locating groove, and the first locating groove can rotate relative to the first locating pin.

13. The delivery sheath of claim 11, wherein the operating handle further comprises a housing and at least one second positioning pin, wherein a portion of the second knob is configured to be inserted into the housing and has a second positioning slot, the second positioning pin passes through the housing and is inserted into the second positioning slot, and the second positioning slot is rotatable relative to the second positioning pin.

14. The delivery sheath of claim 7, wherein the first deflection section is disposed at a distal end of the deflection sheath and the second deflection section is disposed between a proximal end of the deflection sheath and the first deflection section, the first deflection section being bendable in a first plane and the second deflection section being bendable in a second plane, wherein the first plane intersects the second plane.

15. The delivery sheath of claim 14, wherein the first and second turn sections are the same turn section.