CN219185471U - Adjustable bent sheath tube - Google Patents

Abstract

The adjustable bent sheath tube comprises a tube body, a traction piece and a support piece, wherein the tube body is sequentially provided with a non-bending section and a bending section along the direction from the proximal end to the distal end, the distal end of the traction piece is connected with the bending section, the proximal end of the traction piece extends out of the tube body, and at least part of the support piece is arranged in the tube wall of the non-bending section in a penetrating manner and is used for supporting the non-bending section to keep a straight line state in the bending state of the bending section. According to the adjustable bending sheath tube, the distal end of the tube body can be effectively bent, and meanwhile, the bending deformation resistance of the non-bending section is improved, so that the non-bending section is prevented from bending in the bending process of the tube body, the non-bending section is further ensured to be in a straight line state, the accuracy of the bending angle of the bending section is ensured, and the compression or damage to a blood vessel caused by bending of the non-bending section is reduced or avoided.

Description

Adjustable bent sheath tube

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an adjustable bent sheath tube.

Background

Medical sheaths have been widely used in minimally invasive interventional diagnostic and therapeutic procedures for creating channels, delivering or retrieving instruments, infusing drugs, or delivering body fluids. Compared with the common sheath tube, the adjustable bent sheath tube has the function of adjusting the bending of the far end, and can quickly and reliably reach the target lesion position so as to reduce the operation time.

However, when the bending of the sheath tube is adjusted, humpback phenomenon occurs at the other side of the bending of the sheath tube, namely, the bending part which is not adjusted is bent greatly, so that the sheath tube is not straight. And humpback causes the following problems:

1) In the operation process, when the sheath tube is conveyed into a blood vessel of a human body to be bent, the whole sheath tube is bent in a humpback manner to press the blood vessel, and the wall of the blood vessel is damaged when serious;

2) The bending section of the sheath tube is bent in a humpback way due to the integral sheath tube, so that the bending angle of the bending section is lost, and the bending angle cannot reach the ideal state in design.

Disclosure of Invention

The utility model aims to at least solve the problem that a non-bending section of a sheath tube is bent in the bending process. This object is achieved by:

the utility model provides an adjustable curved sheath tube, which comprises:

the tube body is sequentially provided with a non-bending section and a bending section along the direction from the proximal end to the distal end;

the distal end of the traction piece is connected with the bending section, and the proximal end of the traction piece extends out of the tube body;

and the supporting piece is at least partially penetrated into the pipe wall of the non-bending section and used for supporting the non-bending section to keep a straight state in the bending state of the bending section.

In addition, the adjustable curved sheath tube according to the utility model can also have the following additional technical characteristics:

in some embodiments of the utility model, the support member is movably disposed through the wall of the non-bending section in the axial direction of the tube body, and the proximal end of the support member extends outside the tube body.

In some embodiments of the utility model, the direction of movement of the traction element and the support element is reversed during bending of the bending section.

In some embodiments of the utility model, the adjustable bend sheath further comprises a driving device rotatably or movably sleeved outside the tube body, and the proximal end of the traction member and/or the proximal end of the support member is connected with the driving device.

In some embodiments of the present utility model, the driving device is rotatably sleeved on the outside of the tube body, and includes:

the proximal end of the traction piece and/or the proximal end of the support piece are/is connected with the at least one sliding block, the sliding block is sleeved outside the pipe body in a mode of being capable of moving along the axial direction of the pipe body, and at least part of the outer surface of the sliding block is provided with external threads;

the inner wall surface of the transmission piece is provided with an internal thread matched with the external thread, and the transmission piece is sleeved outside the sliding block in a rotatable mode and is in threaded transmission with the sliding block.

In some embodiments of the present utility model, the driving device further includes a limiting assembly, the limiting assembly includes a support plate and two side plates disposed on the support plate, the pipe body passes through the support plate and the support plate is fixed relative to the pipe body, the two side plates are disposed opposite to each other and extend along an axial direction of the pipe body, and the at least one slider is disposed between the two side plates.

In some embodiments of the present utility model, the driving device further includes a sleeve, the sleeve is sleeved on the outside of the pipe body and fixed relative to the pipe body, the at least one slider is sleeved on the outside of the sleeve in a manner of being movable along an axial direction of the sleeve, the sleeve passes through the support plate and is fixed relative to the sleeve, and the sleeve is provided with a number of extraction holes consistent with that of the at least one slider.

In some embodiments of the present utility model, the adjustable curved sheath further includes a handle and a rotating member, wherein the driving device is disposed inside the handle, and at least a portion of the rotating member is disposed outside the handle and connected to the driving member, for driving the driving member to rotate.

In some embodiments of the present utility model, the at least one slider includes a first slider and a second slider, one of the traction member and the support member is connected to the first slider, the other of the traction member and the support member is connected to the second slider, a first internal thread section and a second internal thread section are provided on an inner wall surface of the transmission member along an axial direction of the transmission member, a rotation direction of the first internal thread section and a rotation direction of the second internal thread section are opposite, and the first slider is in screw-driving with the first internal thread section, and the second slider is in screw-driving with the second internal thread section.

In some embodiments of the present utility model, the tube body includes a first side surface and a second side surface which are disposed opposite to each other, an inner side of the bending direction of the bending section is disposed on the first side surface in a bent state of the bending section, an outer side of the bending direction of the bending section is disposed on the second side surface, a distal end of the traction member is connected to a distal end of the first side surface of the bending section, and the support member is penetrated in a tube wall of the second side surface of the non-bending section.

According to the adjustable sheath tube, the distal end of the traction piece is connected with the bending section, the proximal end of the traction piece extends out of the tube body, the bending section is bent and deformed under the action of the traction piece by pulling the proximal end of the traction piece, so that the distal end of the tube body is bent, at least part of the support piece is arranged in the tube wall of the non-bending section of the tube body in a penetrating manner, in the conveying process, the support piece can be arranged in the tube body, the flexibility of the tube body can be improved, so that the tube body is adapted to a bent vascular environment, when bending is required, the support piece can penetrate into the tube wall of the non-bending section of the tube body, the operation process is more flexible, the bending deformation resistance of the non-bending section can be effectively improved, the bending of the non-bending section is prevented in a straight line state in the bending process of the tube body, the bending angle of the non-bending section is ensured, and the compression or damage to the vascular is reduced or avoided.

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 utility model. Also, like reference numerals are used to designate like parts throughout the figures. Wherein:

FIG. 1 is a schematic view of an adjustable bend sheath according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the adjustable curved sheath with a portion of the housing removed according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a portion of an adjustable curved sheath according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of an adjustable curved sheath according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of the portion A of the adjustable bend sheath according to an embodiment of the present utility model;

FIG. 6 is an enlarged view of a portion B of an adjustable bend sheath according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a portion of a transmission member according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram showing the relative positions of the first slider and the sleeve according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram showing the relative positions of the second slider and the sleeve according to an embodiment of the present utility model;

FIG. 10 is a schematic structural view of a limiting assembly according to an embodiment of the present utility model;

FIG. 11 is a schematic view of a sleeve according to an embodiment of the present utility model;

fig. 12 is a schematic structural view of a rotary member according to an embodiment of the present utility model.

The reference numerals in the drawings are as follows:

1: an adjustable curved sheath;

10: handle, 11: a housing, 12: a front end cover;

20: tube body, 21: non-bending section, 22: bending section, 23: first side, 24: second side, 25: a bending piece;

30: a traction member;

40: a support;

50: driving device, 51: first slider, 511: first external thread, 52: second slider, 521: second external thread, 53: driving medium, 531: first internal thread segments, 532: second internal thread segment, 533: annular groove, 534: annular projection, 535: connecting groove, 54: limit component, 541: support plate, 5411: mounting holes, 5412: convex groove, 542: first side plates, 543: second side plate, 55: sleeve 551: first extraction holes, 552: second extraction holes, 553: annular portion, 554: mounting protrusions, 555: a third external thread;

60: rotating member, 61: annular baffle, 62: a connection protrusion;

70: and a joint member.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model 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 utility model 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 include those depicted in the figures different orientations of the device in use or operation than the orientation. 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. Thus, 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".

The utility model provides an adjustable bending sheath tube, which can effectively solve the problem that a non-bending section of the sheath tube is bent in the bending process.

Referring to fig. 1 to 6, the adjustable sheath tube 1 of the present utility model includes a tube body 20, a traction member 30 and a supporting member 40, wherein the tube body 20 is sequentially provided with a non-bending section 21 and a bending section 22 along a direction from a proximal end toward a distal end, the distal end of the traction member 30 is connected with the bending section 22, the proximal end of the traction member 30 extends out of the tube body 20, and at least a portion of the supporting member 40 is disposed in a tube wall of the non-bending section 21 in a penetrating manner and is used for supporting the non-bending section 21 in a straight state in a bending state of the bending section 22. It should be noted that the extension of the proximal end of the pulling member 30 to the outside of the tube body 20 may be understood as the extension of the proximal end of the pulling member 30 from the proximal end of the tube body 20 or from the side wall of the tube body 20 near the proximal end.

According to the adjustable bending sheath 1 disclosed by the utility model, the distal end of the traction piece 30 is connected with the bending section 22, the proximal end of the traction piece 30 extends out of the tube body 20, and the bending section 22 is bent under the action of the traction piece 30 by pulling the proximal end of the traction piece 30, so that the distal end of the tube body 20 is bent, meanwhile, as at least part of the support piece 40 is penetrated into the tube wall of the non-bending section 21 of the tube body 20, in the conveying process, the support piece 40 can be not arranged in the tube body 20, the flexibility of the tube body 20 can be improved, so that the bent vascular environment is adapted, when bending is required, the support piece 40 can be penetrated into the tube wall of the non-bending section of the tube body 20, so that the operation process is more flexible, wherein the support piece 40 can effectively improve the bending deformation resistance of the non-bending section 21, thereby preventing the non-bending section 21 from being bent in the accurate straight state in the bending process of the tube body 20, ensuring the bending angle of the non-bending section 21, and reducing or preventing the non-bending section 21 from being bent or being damaged by pressing the vascular.

In particular, as shown in connection with fig. 1 to 4, in one embodiment of the present utility model, the adjustable bend sheath 1 includes a handle 10, and a driving device 50 and a portion of the tube body 20 are provided inside the handle 10. Wherein, to facilitate assembly of the components inside the handle 10, the handle 10 includes a housing 11 and a front cover 12 that are detachably connected. The housing 11 includes a first housing and a second housing symmetrically disposed along a plane in which the own axis lies, and the first housing and the second housing enclose a cavity structure for accommodating the driving device 50. The proximal end of the traction element 30 and the proximal end of the support element 40 are each connected to a driving device 50. Wherein, the center of the front end cover 12 is also provided with a through hole for leading out the tube body 20, and the distal end of the tube body 20 can be penetrated out of the handle 10 through the through hole.

Referring to fig. 3 to 6, in one embodiment of the present utility model, the adjustable bending sheath 1 further includes a bending member 25, wherein the bending member 25 is disposed in the bending section 22, and the bending member 25 is easily bent in a direction perpendicular to the axial direction thereof. In particular, an annular groove may be provided in the bending section 22, and the bending piece 25 is embedded in the annular groove. The bending piece 25 can be bent toward one side by the traction action of the traction piece 30. The pipe body 20 includes a first side 23 and a second side 24 symmetrically disposed along a plane where the axis of the pipe body is located, when the bending section 22 is in a bending state, an inner side of the bending section 22 in a bending direction is disposed on the first side 23, and an outer side of the bending section 22 in the bending direction is disposed on the second side 24. The distal end of the pulling member 30 is connected to the distal end of the bending member 25 on the first side 23, and the proximal end of the pulling member 30 extends outside the tube body 20 and is connected to the driving device 50, and at least part of the structure of the pulling member 30 is arranged in the tube wall of the tube body 20 in a penetrating manner, so that the bending section 22 is bent by pulling the pulling member 30. The distal end of the supporting member 40 is disposed in the pipe wall of the non-bending section 21, and the proximal end of the supporting member 40 extends out of the pipe body 20 and is connected to the driving device 50, and at least part of the structure of the supporting member 40 is disposed in the pipe wall of the pipe body 20 in a penetrating manner, so that the non-bending section 21 is maintained in a straight state by the supporting effect of the supporting member 40. In the present embodiment, the support 40 is provided through the wall of the second side 24 of the non-bending section 21. In other embodiments, the support 40 may also be threaded into the wall of the first side 23 of the non-bending section 21, or the support 40 may also be threaded into the wall of the first and second sides 23, 24 of the non-bending section 21.

Specifically, the traction member 30 is a bending-adjusting wire, the supporting member 40 is a supporting rod, and in order to ensure the supporting strength of the supporting member 40 to the non-bending-adjusting section 21, the non-bending-adjusting section 21 is prevented from bending deformation during the bending adjustment of the pipe body 20, so that the non-bending-adjusting section 21 has enough bending deformation resistance, in some embodiments of the present utility model, the area of the cross section of the supporting rod is S1, and the area of the cross section of the bending-adjusting wire is S2, where S1 > 1.2×s2. Specifically, the material of the support member 40 may be selected from nickel titanium alloy. It will be appreciated that the relationship between S1 and S2 is not limited to S1 > 1.2X1S 2, as long as the support member 40 is capable of supporting the non-bending section 21 such that the non-bending section 21 does not bend.

As shown in fig. 2 to 9, in some embodiments of the present utility model, the driving device 50 is rotatably sleeved outside the tube body 20, and drives the traction member 30 and the support member 40 to move in the axial direction of the tube body 20 by rotating itself.

Specifically, in some embodiments of the present utility model, the driving device 50 includes a first slider 51, a second slider 52, and a transmission member 53. To facilitate assembly of other components inside the transmission member 53, the transmission member 53 includes a first transmission portion and a second transmission portion symmetrically disposed along a plane where a line thereof is located, and the first transmission portion and the second transmission portion are detachably connected, such as fastened. The inner wall surface of the transmission member 53 is provided with a first internal thread section 531 and a part of a second internal thread section 532 at intervals along the axial direction thereof, the first internal thread section 531 is provided at the distal end of the second internal thread section 532, and the directions of rotation of the first internal thread section 531 and the second internal thread section 532 are opposite. The two opposite sides of the first slider 51 are respectively provided with a first external thread 511, the first external thread 511 and the first internal thread section 531 are in threaded transmission, the two opposite sides of the second slider 52 are respectively provided with a second external thread 521, and the second external thread 521 and the second internal thread section 532 are in threaded transmission. The support 40 is connected to a first slider 51 and the traction member 30 is connected to a second slider 52. Wherein the number of turns of the first female screw section 531 and the second female screw section 532 is the same, the pitch is the same, thereby ensuring that the first slider 51 and the second slider 52 can move the same distance. Specifically, the materials of the first slider 51, the second slider 52, and the transmission member 53 may be selected from high molecular materials such as POM (polyoxymethylene), PA66 (polyamide 66 or nylon 66), and the like.

Because the first and second internally threaded segments 531, 532 are oppositely threaded, when the driver 53 is rotated, one of the first and second sliders 51, 52 moves toward the distal end of the tube 20 and the other of the first and second sliders 51, 52 moves toward the proximal end of the tube 20. When the tube 20 is in a straight state and bending of the bending section 22 is required, the transmission member 53 is rotated, and at this time, the second slider 52 moves toward the proximal end of the tube 20, and the traction member 30 moves together with the second slider 52 toward the proximal end of the tube 20, so that the bending section 22 is pulled toward the proximal end of the tube 20 and the bending section 22 is bent and deformed. Simultaneously, the first slider 51 moves toward the distal end of the tube body 20, and the supporting member 40 moves together with the first slider 51 toward the distal end of the tube body 20, thereby supporting the non-bending section 21 and preventing the non-bending section 21 from bending deformation. And the support member 40 is gradually moved toward the distal end near the tube body 20 during the increase of the bending angle of the bending section 22. When the bending section 22 is in a straight state, a certain distance is provided between the distal end of the supporting member 40 and the proximal end of the bending section 22, so that the distal end of the non-bending section 21 has a certain flexibility, and when entering a blood vessel, the bending section 22 is convenient to bend in cooperation, and the bending section is suitable for the bent blood vessel. When the bending angle of the bending section 22 reaches a maximum, the distal end of the support member 40 can reach the proximal end of the bending section 22, but does not exceed the proximal end of the bending section 22, so that the normal bending process of the bending section 22 is not affected by the presence of the support member 40.

In some embodiments of the present utility model, in the initial state of the adjustable bend sheath 1, i.e., when the bending section 22 is not bent and is about to bend, the pulling member 30 is in tension, the first slider 51 is disposed at the proximal end of the first internally threaded section 531 and the second slider 52 is disposed at the distal end of the second internally threaded section 532.

In some embodiments of the present utility model, when the adjustable bending section 22 is not bent and is about to bend in the initial state of the adjustable bending sheath 1, the traction member 30 is in a tensioned state, the traction member 30 may be further connected to the first slider 51, the first slider 51 is disposed at the distal end of the first internal thread section 531, the support member 40 is connected to the second slider 52, and the second slider 52 is disposed at the proximal end of the second internal thread section 532, and the transmission member 53 is rotated to move the second slider 52 toward the distal end of the tube body 20, so that the first slider 51 is moved toward the proximal end of the tube body 20, and the adjustable bending section 22 can also be bent while maintaining the non-adjustable bending section 21 in a straight state.

As shown in fig. 4, 5 and 7, in some embodiments of the present utility model, the outer circumferential surface of the transmission member 53 is further provided with an annular groove 533, and a fixing protrusion is provided on the housing 11 at a position corresponding to the annular groove 533, and the annular groove 533 is matched with the fixing protrusion, thereby fixing the axial position of the transmission member 53 in the handle 10, and ensuring that the transmission member 53 can rotate around the axis of the tube body 20, preventing movement of the traction member 30 and the support member 40 due to axial movement of the transmission member 53 itself. Further, an annular protrusion 534 is further provided on the inner wall surface of the transmission member 53 at a position corresponding to the annular groove 533, and the first female screw section 531 and the second female screw section 532 are provided on both sides of the annular protrusion 534, respectively, so that the first female screw section 531 and the second female screw section 532 are separated by the annular protrusion 534, thereby restricting the moving distance of the first slider 51 and the second slider 52.

Further, as shown in fig. 3 and 10, in some embodiments of the present utility model, the driving device 50 further includes a limiting component 54, and by setting the limiting component 54, the first slider 51 and the second slider 52 can be ensured to move along the axial direction of the tube body 20, and not rotate during the movement.

Specifically, the limiting assembly 54 includes a support plate 541, a first side plate 542 and a second side plate 543, where the first side plate 542 and the second side plate 543 are respectively disposed on a plate surface of the support plate 541 facing the distal end of the tube body 20, the tube body 20 passes through the support plate 541 and is relatively fixed with respect to the support plate 541, the first side plate 542 and the second side plate 543 are disposed opposite to each other and extend along an axial direction of the tube body 20, and the first slider 51 and the second slider 52 are disposed between the first side plate 542 and the second side plate 543, so that rotation of the first slider 51 and the second slider 52 during movement is limited by the first side plate 542 and the second side plate 543.

As shown in fig. 3, 10 and 11, in some embodiments of the present utility model, the driving device 50 further includes a sleeve 55, the sleeve 55 is sleeved outside the tube body 20 and fixed with respect to the tube body 20, the first slider 51 and the second slider 52 are sleeved outside the sleeve 55 in a manner of being movable in an axial direction of the sleeve 20, and the support plate 541 is sleeved outside the sleeve 55 and fixed with respect to the sleeve 55. Specifically, the support plate 541 is provided with a mounting hole 5411 at a central position, and the sleeve 55 is provided with an annular portion 553 at a proximal end thereof, wherein the diameter of the annular portion 553 is larger than that of the mounting hole 5411, and the sleeve 55 is passed through the mounting hole 5411 at a distal end thereof and abuts the annular portion 553 against the proximally facing surface of the support plate 541. The mounting hole 5411 is provided with a plurality of convex grooves 5412 which are arranged at intervals in the circumferential direction, the surface of the annular portion 553 facing the far end is provided with a plurality of mounting protrusions 554 which are arranged at intervals, the number of the mounting protrusions 554 is consistent with that of the convex grooves 5412, and when the annular portion 553 is abutted to the surface of the supporting plate 541 facing the near end, the plurality of mounting protrusions 554 are respectively clamped in the plurality of convex grooves 5412, so that the sleeve 55 and the supporting plate 541 are connected and fixed. The support plate 541 is clamped with the housing 11, so that the position of the sleeve 55 relative to the housing 11 is fixed, that is, the sleeve 55 is fixed relative to the pipe body 20, so that the first slider 51 and the second slider 52 are conveniently sleeved outside the sleeve 55 in a manner of being capable of moving along the axial direction of the sleeve 55, and the sleeve 55 is not caused to move or rotate relative to the pipe body 20 during the moving process of the first slider 51 and the second slider 52.

Further, as shown in connection with fig. 5 and 11, in some embodiments of the present utility model, in order to facilitate connection of the traction member 30 and the support member 40 to the first slider 51 and the second slider 52, respectively, the sleeve 55 is further provided with a first extraction hole 551 and a second extraction hole 552 disposed at a distance from each other, wherein the second extraction hole 552 is disposed on the sleeve 55 at a position corresponding to the annular protrusion 534, and the first extraction hole 551 is disposed on the sleeve 55 at a position beyond the distal end of the first female thread section 531, thereby facilitating extraction of the traction member 30 and the support member 40 from the sleeve 55 to be connected to the first slider 51 and the second slider 52, respectively.

Further, as shown in fig. 4 and 11, in some embodiments of the present utility model, the distal end of the sleeve 55 is further provided with a third external thread 555, the inner wall surface of the front end cover 12 at the through hole for guiding the pipe body 20 is provided with an internal thread matching with the third external thread 555, the distal end of the sleeve 55 is screwed with the front end cover 12, so that the front end cover 12 corresponds to the position of the housing 11, the overall structure of the handle 10 is formed, and the driving device 50 is entirely covered inside the handle 10.

In some embodiments of the present utility model, the driving device 50 may also control the movement of the traction member 30 and/or the supporting member 40 by directly driving the sliding block to move in the axial direction of the pipe body 20 by connecting the traction member 30 and/or the supporting member 40 to the sliding block without providing the transmission member 53.

As shown in connection with fig. 2, 4, 7 and 12, in some embodiments of the present utility model, the adjustable bend sheath 1 further comprises a rotating member 60, at least part of the rotating member 60 being provided outside the handle 10 and being connected to the transmission member 53 for driving the transmission member 53 to rotate.

Specifically, the rotary member 60 is sleeved outside the distal end of the transmission member 53. The outer peripheral surface of the distal end of the transmission member 53 is provided with a plurality of connection grooves 535 at intervals along the circumferential direction, the inner wall surface of the rotation member 60 is provided with a plurality of connection protrusions 62 at intervals along the circumferential direction, and the plurality of connection protrusions 62 are respectively inserted into the plurality of connection grooves 535, so that the transmission connection between the rotation member 60 and the transmission member 53 is realized, and the rotation member 60 is rotated outside the handle 10 to drive the transmission member 53 to rotate together, so as to drive the first slider 51 and the second slider 52 to move along opposite directions, and further drive the traction member 30 and the support member 40 to adjust the bending condition of the pipe 20. The inner wall surface of the rotating member 60 is further provided with an annular baffle 61, distal ends of the plurality of connection protrusions 62 are respectively abutted against the annular baffle 61, and the insertion depth of the connection grooves 535 in the rotating member 60 can be limited by the arrangement of the annular baffle 61. The side of the rotating member 60, on which the connecting protrusion 62 is not arranged, is abutted against the front end cover 12, so that the overall appearance of the adjustable curved sheath tube 1 is improved.

Referring to fig. 2 to 4, in some embodiments, the adjustable curved sheath 1 further includes a connector 70, and one end of the connector 70 passes through the housing 11 and is clamped inside the housing 11, so that the positions of the connector 70 and the housing 11 are relatively fixed. At the same time, the proximal end of the tube 20 is inserted into the connector bore and secured, thereby securing the position of the tube 20 relative to the handle 10, while the other end of the connector 70 is disposed outside the handle 10 for communication with other devices, such as a guidewire fed through the connector 70 to the tube 20 inside the handle 10.

The present utility model 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 utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. An adjustable bend sheath comprising:

the tube body is sequentially provided with a non-bending section and a bending section along the direction from the proximal end to the distal end;

the distal end of the traction piece is connected with the bending section, and the proximal end of the traction piece extends out of the tube body;

and the supporting piece is at least partially penetrated into the pipe wall of the non-bending section and used for supporting the non-bending section to keep a straight state in the bending state of the bending section.

2. The adjustable bend sheath of claim 1, wherein the support member is movably disposed through the wall of the non-bending section in the axial direction of the tube body, the proximal end of the support member extending outside the tube body.

3. The adjustable bend sheath of claim 2, wherein the direction of movement of the traction member and the support member are reversed during bending of the bending section.

4. An adjustable bend sheath according to claim 3, further comprising a drive means rotatably or movably disposed about the exterior of the body, the proximal end of the traction member and/or the proximal end of the support member being connected to the drive means.

5. The adjustable bend sheath of claim 4, wherein the drive means is rotatably disposed about the exterior of the body, the drive means comprising:

the proximal end of the traction piece and/or the proximal end of the support piece are/is connected with the at least one sliding block, the sliding block is sleeved outside the pipe body in a mode of being capable of moving along the axial direction of the pipe body, and at least part of the outer surface of the sliding block is provided with external threads;

the inner wall surface of the transmission piece is provided with an internal thread matched with the external thread, and the transmission piece is sleeved outside the sliding block in a rotatable mode and is in threaded transmission with the sliding block.

6. The adjustable curved sheath according to claim 5, wherein the drive device further comprises a spacing assembly, the spacing assembly comprises a support plate and two side plates disposed on the support plate, the tube body passes through the support plate and the support plate is fixed relative to the tube body, the two side plates are disposed opposite to each other and extend along the axial direction of the tube body, and the at least one slider is disposed between the two side plates.

7. The adjustable bend sheath according to claim 6, wherein the drive device further comprises a sleeve, the sleeve is sleeved outside the tube body and fixed relative to the tube body, the at least one slider is sleeved outside the sleeve in a manner of being movable along an axial direction of the sleeve, the sleeve passes through the support plate and is fixed relative to the sleeve, and the sleeve is provided with a plurality of extraction holes consistent with the number of the at least one slider.

8. The adjustable bend sheath of claim 5, further comprising a handle and a rotating member, wherein the driving device is disposed inside the handle, and wherein at least a portion of the rotating member is disposed outside the handle and coupled to the driving member for driving the driving member to rotate.

9. The adjustable curved sheath according to claim 5, wherein the at least one slider comprises a first slider and a second slider, wherein one of the traction member and the support member is connected to the first slider, the other of the traction member and the support member is connected to the second slider, wherein the inner wall surface of the transmission member is provided with a first internal thread section and a second internal thread section in the axial direction thereof, the directions of rotation of the first internal thread section and the second internal thread section are opposite, the first slider is in threaded transmission with the first internal thread section, and the second slider is in threaded transmission with the second internal thread section.

10. The adjustable bend sheath according to any one of claims 1 to 9, wherein the tube body comprises a first side surface and a second side surface which are disposed opposite to each other, an inner side of the bending direction of the bending section being disposed on the first side surface in the bent state of the bending section, an outer side of the bending direction of the bending section being disposed on the second side surface, a distal end of the traction member being connected to a distal end of the first side surface of the bending section, and the support member being provided to penetrate a tube wall of the second side surface of the non-bending section.

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