CN216676033U

CN216676033U - Sheath pipe, intervention apparatus conveyor and conveying system

Info

Publication number: CN216676033U
Application number: CN202123195955.1U
Authority: CN
Inventors: 潘孔荣; 熊杰; 王翔宇
Original assignee: Peijia Medical Technology Suzhou Co ltd
Current assignee: Peijia Medical Technology Suzhou Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-07
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a sheath tube, which comprises a tube body, an adjusting piece and a traction piece, wherein the tube body is provided with a tube body; the tube body comprises a bendable distal end; the traction piece comprises a first traction section, an installation section and a second traction section which are arranged in sequence; the adjusting piece comprises a fixing part; the free ends of the first traction section and the second traction section are fixed at the far ends and are driven by the adjusting piece to drive the far ends to bend; the mounting section is movably arranged on the fixing part, and at least part of the mounting section slides around at least part of the fixing part under the driving of the adjusting piece. Through the mode, the traction piece can balance the tension force applied to the traction piece, and the problem that the traction piece is broken due to large stress is solved.

Description

Sheath pipe, intervention apparatus conveyor and conveying system

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a sheath tube and interventional instrument conveying device and a conveying system.

Background

The medical sheath has been widely applied to various minimally invasive interventional diagnosis and treatment operations, and can be used for channel establishment, medical instrument delivery or recovery, drug input or body fluid export. The adjustable bending sheath tube has an adjustable bending function, and can quickly and reliably reach a target lesion position through free bending adjustment of the far end so as to reduce operation time. Especially, the space structure of human heart and blood circulation system is complex, and the adjustable bending sheath can reliably and stably pass through the blood vessel or the physiological structure in the heart or can release the implant and the blood vessel coaxially in the process of performing minimally invasive and therapeutic operations on the adjustable bending sheath.

The adjustable bending sheath tube in the prior art basically realizes the bending adjustment of the far end of the catheter by embedding a slidable traction piece in the tube body. The far end of the traction piece is fixed with the far end of the catheter, the near end of the traction piece is fixed with the adjusting handle, and the bending adjusting function is achieved through the adjusting handle. Because the bending strength of the far-end tube body of the bending adjusting part of the bending-adjustable sheath tube is high, the traction wires for bending adjustment need to be respectively embedded at least two symmetrical positions of the tube body. However, the traction member is directly fixed inside the adjusting handle, and under the influence of the adjusting handle, the stress of the traction wire is very easy to be uneven in the bending adjusting process, so that the traction wire with larger stress may be broken or even protruded out of the tube body, thereby causing the bending adjusting function to fail and even causing operation accidents.

SUMMERY OF THE UTILITY MODEL

The utility model mainly solves the technical problem of providing a sheath tube, an interventional instrument conveying device and a conveying system, which can balance the tension force on a traction piece and solve the problem that the traction piece is broken due to larger stress.

In order to solve the technical problems, the utility model adopts a technical scheme that: a sheath is provided. The sheath tube comprises a tube body, an adjusting piece and a traction piece, wherein the tube body comprises a bendable far end; the traction piece comprises a first traction section, an installation section and a second traction section which are arranged in sequence; the adjusting piece comprises a fixing part; the free ends of the first traction section and the second traction section are fixed at the far ends and are driven by the adjusting piece to drive the far ends to bend; the mounting section is movably arranged on the fixing part, and at least part of the mounting section slides around at least part of the fixing part under the driving of the adjusting piece.

Wherein, be provided with in the regulating part and run through the groove, the fixed part is protruding by the inner wall that runs through the groove and forms, and the installation section holding is in running through the inslot and suit at the fixed part.

A channel is formed between at least one part of the side wall of the fixing part and the inner wall of the through groove, and the first traction section and the second traction section are respectively and slidably accommodated in the channel; at least one part of the side wall of the fixing part is arc-shaped; the mounting section and at least a part of the side wall are mutually supported and pushed in a sliding way.

The fixing part comprises an arc-shaped end face, and the mounting section can slide around the arc-shaped end face under the driving of the adjusting part; the corresponding arc radiuses of all the parts of the arc end surfaces are equal.

The first traction section and the second traction section are parallel to each other in the axial direction of the pipe body; or the intersection point of the extension lines of the first traction section and the second traction section is on the central axis of the fixing part.

Wherein, the fixed part includes the pulley, and the installation section activity suit is on the pulley.

Wherein, the regulating part still includes the regulating part and with regulating part swing joint's regulating block, the fixed part setting is on the regulating block, regulating block and regulating part relative movement.

The pipe body is provided with at least one traction piece channel, the traction piece channel extends along the axial direction of the pipe body, the first traction section and the second traction section are contained in the corresponding traction piece channels respectively, and the free ends of the first traction section and the second traction section are fixed on the corresponding traction piece channels.

In order to solve the technical problem, the utility model adopts another technical scheme that: an interventional instrument delivery device is provided, which comprises the sheath.

In order to solve the technical problem, the utility model adopts another technical scheme that: a delivery system is provided comprising the sheath described above.

The utility model has the beneficial effects that: the utility model provides a sheath tube, which comprises a tube body, an adjusting piece and a traction piece; the tube body comprises a bendable distal end; the traction piece comprises a first traction section, an installation section and a second traction section which are arranged in sequence; the adjusting piece comprises a fixing part; wherein, the free ends of the first traction section and the second traction section are fixed at the far end, and the mounting section is movably arranged on the fixing part. Controlling the regulating part and coming the pulling to draw the piece and realize the in-process that the sheath pipe was transferred and is bent, controlling power and the displacement that the regulating part produced and passing through the fixed part and transmitting to drawing the piece, the first section of drawing that makes to draw the piece and the second section of drawing removes to the body in the axial, then transmits this power and displacement to the distal end of body to the distal end of drive body is crooked, realizes the accent of sheath pipe and bends. In the process of controlling the regulating part, when the atress everywhere of regulating part is uneven to lead to the fixed part to draw the section with the second when the driving force of section is uneven to first drawing, because the at least partial installation section of drawing the piece can slide around at least partial fixed part, poor can drive first section or the second of drawing and draw the section and slide around the fixed part, draw the pulling force that the section received until first section and the second of drawing is the same. Therefore, the sheath tube provided by the utility model is movably arranged on the fixed part by utilizing the mounting section, so that the pulling force applied to the first traction section and the second traction section can be balanced, and the first traction section or the second traction section which is stressed greatly is prevented from being broken due to uneven stress of the first traction section or the second traction section, so that the bending adjusting function is failed and even surgical accidents are caused.

Drawings

FIG. 1 is a schematic structural view of a sheath according to an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of the use state of FIG. 1;

FIG. 3 is an enlarged view of a portion of the sheath of FIG. 1;

FIG. 4 is a cross-sectional view of the structure of FIG. 3;

fig. 5 is a partial structural sectional view of fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not be within the protection scope of the present invention.

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. For ease of description, "proximal" and "distal" are used, wherein "distal" refers to the end distal to the operative end of the stent delivery device, and "proximal" refers to the end proximal to the operative end of the stent delivery device.

Broadly speaking, the present invention provides a sheath comprising a tube body, an adjustment member and a pulling member; the tube body comprises a bendable distal end; the traction piece comprises a first traction section, an installation section and a second traction section which are arranged in sequence; the adjusting piece comprises a fixing part; wherein, the free ends of the first traction section and the second traction section are fixed at the far end, and the mounting section is movably arranged on the fixing part. Controlling the regulating part and coming the pulling to draw the piece and realize the in-process that the sheath pipe was transferred and is bent, controlling power and the displacement that the regulating part produced and passing through the fixed part and transmitting to drawing the piece, the first section of drawing that makes to draw the piece and the second section of drawing removes to the body in the axial, then transmits this power and displacement to the distal end of body to the distal end of drive body is crooked, realizes the accent of sheath pipe and bends. In the process of controlling the regulating part, when the atress everywhere of regulating part is uneven to lead to the fixed part to draw the section with the second when the driving force of section is uneven to first drawing, because the at least partial installation section of drawing the piece can slide around at least partial fixed part, poor can drive first section or the second of drawing and draw the section and slide around the fixed part, draw the pulling force that the section received until first section and the second of drawing is the same. Therefore, the sheath tube provided by the utility model is movably arranged on the fixed part by utilizing the mounting section, so that the pulling force applied to the first traction section and the second traction section can be balanced, and the first traction section or the second traction section which is stressed greatly is prevented from being broken due to uneven stress of the first traction section or the second traction section, so that the bending adjusting function is failed and even surgical accidents are caused.

Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a sheath according to an embodiment of the utility model, and fig. 2 is a schematic partial structural diagram of the usage state of fig. 1. In this embodiment, the sheath 100 includes a tube body 110, an adjusting member 130, and a pulling member 150. The body 110 includes a bendable distal end 111, the distal end 111 being capable of effecting bending of the body 110 under a bending action. That is, the distal end 111 of the tube 110 can be regarded as an elastic end, and the original shape of the distal end 111 of the tube 110 can be changed by the bending adjustment action, for example, the distal end 111 of the tube 110 is bent from a straight shape, or the original bending angle of the distal end 111 of the tube 110 is changed.

Alternatively, the size of the pipe body 110 may be specifically set according to an actual application scenario. For example, when a device with a large volume is implanted, the inner diameter of the tube body 110 may be large, the outer diameter may be small to reduce the damage to the blood vessel of the human body, and the inner diameter may be large to increase the space for accommodating the device in the tube body 110.

Referring to fig. 1, the pulling member 150 is connected to the adjusting member 130 and the tube body 110, and the pulling member 150 is pulled by operating the adjusting member 130, so that the force and the displacement generated by operating the adjusting member 130 are transmitted to the pulling member 150, the pulling member 150 moves relative to the tube body 110 in the axial direction, and then the force and the displacement are transmitted to the distal end 111 of the tube body 110, so as to drive the distal end 111 of the tube body 110 to bend, thereby bending the sheath tube 100. Based on the above definitions: the distal end 111 and the proximal end of the tube 110 are relative to the user, the end operated by the user is the proximal end of the tube 110, and the end operated to be inserted into the human body is the distal end 111 of the tube 110.

Wherein, the drawing member 150 comprises a first drawing section 153, a mounting section 151 and a second drawing section 155 which are arranged in sequence. Specifically, the pulling member 150 may be integrally formed from the mounting section 151, the first pulling section 153 and the second pulling section 155. Preferably, the first pulling segment 153 and the second pulling segment 155 are located at opposite ends of the mounting segment 151, respectively, and both the first pulling segment 153 and the second pulling segment 155 extend axially along the catheter from opposite ends of the mounting segment 151. It will be appreciated that the thickness, size, shape, material, etc. of the pulling member 150 can be adjusted according to the size and volume of the device to be implanted, and is not limited thereto.

Referring to fig. 3 to 4, fig. 3 is an enlarged view of a portion of the sheath shown in fig. 1, and fig. 4 is a cross-sectional view of the sheath shown in fig. 3. The adjusting member 130 includes a fixing portion 131, the mounting portion 151 of the pulling member 150 is movably disposed on the fixing portion 131, and free ends of the first pulling portion 153 and the second pulling portion 155 are fixed to the distal end 111 of the tube 110. Wherein the free ends of the first pulling section 153 and the second pulling section 155 are both ends remote from the mounting section 151. It will be appreciated that the installed pulling member 150 is generally U-shaped, the mounting segment 151 being a curved portion, and the first pulling segment 153 and the second pulling segment 155 being opposite arms connecting the curved portion, respectively.

In the process of controlling the adjusting member 130 to pull the pulling member 150 to bend the sheath 100, the force and the displacement generated by controlling the adjusting member 130 are transmitted to the pulling member 150 through the fixing portion 131, so that the first pulling section 153 and the second pulling section 155 of the pulling member 150 move in the axial direction relative to the catheter body 110, and then the force and the displacement are transmitted to the distal end 111 of the catheter body 110, thereby driving the distal end 111 of the catheter body 110 to bend, and thus bending the sheath 100 is achieved. Specifically, in the process of operating the adjusting member 130, when the forces at various positions of the adjusting member 130 are unbalanced, so that the pushing force of the fixing portion 131 to the first pulling portion 153 and the second pulling portion 155 is uneven, since at least part of the mounting portion 151 of the pulling member 150 can slide around at least part of the fixing portion 131, the force difference can drive the first pulling portion 153 or the second pulling portion 155 to slide around at least part of the fixing portion 131 until the pulling forces applied to the first pulling portion 153 and the second pulling portion 155 are the same. Therefore, the sheath 100 provided by the utility model is movably arranged on the fixing part 131 by using the mounting section 151, so that the tension applied to the first traction section 153 and the second traction section 155 can be balanced, and the first traction section 153 or the second traction section 155 which is subjected to larger stress is prevented from being broken due to uneven stress of the first traction section 153 or the second traction section 155, so that the bending function is disabled and even an operation accident is caused.

It can be understood that, in order to make the movable connection between the mounting section 151 of the pulling member 150 and the fixing section 151 of the pulling member 150 generate better effect of balancing the pulling force, a lubricant such as silicone oil may be disposed at the movable connection between the fixing section 131 and the mounting section 151 of the pulling member 150 to reduce friction between the fixing section 131 and the mounting section 151 of the pulling member 150, which may be specifically disposed according to actual use requirements and is not limited herein.

Referring to fig. 2-3, in one embodiment, the adjusting element 130 has a through slot 133 therein, the fixing portion 131 can be regarded as a protrusion formed by an inner wall of the through slot 133, and the mounting portion 151 of the pulling element 150 is received in the through slot 133 and is sleeved on the fixing portion 131. That is, the fixing portion 131 is a pillar protruded through the inner wall of the groove 133, and the groove 133 and the fixing portion 131 may be integrally formed.

More specifically, a channel is formed between at least a portion of the sidewall of the fixing portion 131 and the inner wall of the through groove 133, and the first pulling portion 153 and the second pulling portion 155 are slidably received in the channel, respectively. In a specific embodiment, as shown in fig. 3, the fixing portion 131 includes two first sidewalls 1311 spaced apart from each other and two second sidewalls 1313 connecting the two first sidewalls 1311, and the two first sidewalls 1311 and the two second sidewalls 1313 are enclosed to form the fixing portion 131. And a certain distance is provided between the first sidewall 1311 of the fixing portion 131 and the inner wall of the through groove 133 to form a channel for receiving the first pulling portion 153 and the second pulling portion 155, so that the first pulling portion 153 and the second pulling portion 155 are slidably received in the channel formed by the inner wall of the through groove 133 and the second sidewall 1313. The sliding of the first pulling portion 153 and the second pulling portion 155 can be guided by the channel, so that the first pulling portion 153 and the second pulling portion 155 can move conveniently. In addition, in this embodiment, at least a part of the side wall of the fixing portion 131 is arc-shaped, and can be slidably abutted against the mounting segment 151 of the pulling member 150, that is, in the process of operating the adjusting member 130 to pull the pulling member 150 to bend the sheath 100, when the pulling forces applied to the first pulling segment 153 and the second pulling segment 155 are different, the mounting segment 151 can slide around the arc-shaped side wall to balance the pulling forces applied to the first pulling segment 153 and the second pulling segment 155. The side wall is arc-shaped and is in smooth transition, so that sliding obstruction and friction can be reduced, and the sliding of the mounting section 151 is facilitated on one hand; on the other hand, the friction of the mounting segment 151 is reduced, and the abrasion is reduced. It is understood that only a portion of the sidewalls abutting against the mounting segment 151 may be curved, such as the second sidewalls 1313 abutting against the mounting segment 151 in fig. 3, or both of the second sidewalls 1313 may be curved, and are not limited in this respect. Further, at least a part of the side wall of the fixing portion 131 may be arc-shaped or have another arc shape.

In some embodiments, the fixing portion 131 may also be a pulley or the like, the mounting portion 151 of the traction member 150 is sleeved on the pulley, and when the force at various positions of the adjustment member 130 is unbalanced in the process of operating the adjustment member 130, the force difference drives the first traction portion 153 or the second traction portion 155 to slide around the pulley through the movable connection between the traction member 150 and the pulley until the tension applied to the first traction portion 153 and the tension applied to the second traction portion 155 are the same, so as to balance the tension applied to the traction member 150. It is understood that, in order to protect the pulley from the external environment, the adjusting member 130 may also be provided with a receiving cavity for receiving the pulley, and the pulley is fixedly connected to the inner wall of the receiving cavity.

It will be appreciated that, based on the above-described arc-shaped configuration, the sliding of the mounting segment 151 is facilitated and the wear of the mounting segment 151 is reduced, and in other embodiments, the fixing portion 131 may be directly configured as a component including an arc-shaped end surface. The arc-shaped end surface may be circular arc-shaped, elliptical arc-shaped, or the cross section of the fixing portion 131 is curved. Specifically, in one embodiment, the arc radius of each of the arc end surfaces of the fixing portion 131 is the same, that is, the arc end surfaces are arc-shaped. That is, the arc-shaped end surface of the fixing portion 131 may be regarded as a plurality of points, each of which corresponds to the same arc center and has the same distance from the arc center, and the plurality of points are connected to constitute the arc-shaped end surface of the fixing portion 131. Because the corresponding arc radii of each part of the arc end surface are the same, the contact points or lines of the first traction section 153 and the second traction section 155 with the arc end surface are symmetrical; moreover, the external force forcing the traction element 150 to move is the pushing force of the fixing part 131 on the installation section 151, so based on the principle of force analysis, the component force of the pushing force of the fixing part 131 on the installation section 151 in the linear direction of the first traction section 153 and the second traction section 155 is substantially the same, or the difference of the component force of the pushing force in the linear direction of the first traction section 153 and the second traction section 155 is not large, thereby ensuring that the difference of the initial force difference of the first traction section 153 and the second traction section 155 is not large. Therefore, in the process of operating the adjusting member 130, when the forces applied to the positions of the adjusting member 130 are not uniform, so that the pushing forces of the fixing portion 131 on the first pulling portion 153 and the second pulling portion 155 are not uniform, the force difference only drives the first pulling portion 153 or the second pulling portion 155 to slide around the arc-shaped end surface of the fixing portion 131 to a small extent, so that the component forces applied to the first pulling portion 153 and the second pulling portion 155 are the same. That is to say, as long as finely tune can guarantee that the pulling force that first section 153 and second section 155 of pulling received is the same, avoided first section 153 or second section 155 of pulling to pull to slide rocking and the friction that leads to by a wide margin, improved experience and felt and pull a life 150. In addition, the arc-shaped end surface of the fixing part 131 is smooth, so that the sliding resistance and friction between the traction piece 150 and the fixing part 131 can be further reduced, and the service life of the sheath 100 can be prolonged. It is understood that, from the perspective of force analysis, in some specific embodiments, the arc-shaped end surface of the fixing portion 131 may also be a semi-arc-shaped end surface, and the first pulling portion 153 and the second pulling portion 155 are parallel to each other, so that the force components received by the first pulling portion 153 and the second pulling portion 155 are the same.

In other embodiments, the end surface of the fixing portion 131 may have any other shape, but the first pulling portion 153 and the second pulling portion 155 are parallel to each other in the axial direction of the pipe body 110. That is, the mounting section 151 connecting the first drawing section 153 and the second drawing section 155 is attached to the end surface of the fixing section 131, and the first drawing section 153 and the second drawing section 155 are symmetrically disposed. Based on the same reason, from the principle analysis of the force analysis, the component forces of the pushing force of the fixing portion 131 on the installation section 151 in the linear direction of the first traction section 153 and the second traction section 155 are substantially the same, or the difference between the component forces of the pushing force in the linear direction of the first traction section 153 and the second traction section 155 is not large, so that the difference between the initial force of the first traction section 153 and the initial force of the second traction section 155 is not large. Therefore, in the process of operating the adjusting member 130, when the forces applied to the positions of the adjusting member 130 are not uniform, so that the pushing forces of the fixing portion 131 on the first pulling portion 153 and the second pulling portion 155 are not uniform, the force difference only drives the first pulling portion 153 or the second pulling portion 155 to slide around the arc-shaped end surface of the fixing portion 131 to a small extent, so that the component forces applied to the first pulling portion 153 and the second pulling portion 155 are the same. That is to say, as long as can finely tune can guarantee that the pulling force that receives of first section 153 and the second section 155 of pulling is the same, avoided first section 153 or the second section 155 of pulling to slide rocking and friction that leads to by a wide margin, improved experience sense and the life who pulls piece 150. Based on the same force, force analysis and principle reasons, in other embodiments, the intersection point of the extension lines of the first pulling section 153 and the second pulling section 155 is on the central axis of the fixing portion 131. In these embodiments, it can be understood that if the end surface of the fixing portion 131 is not made into a smooth shape, friction may be increased, but, as a whole, the first pulling portion 153 or the second pulling portion 155 may still slide around the fixing portion 131, so that the pulling force applied to the first pulling portion 153 and the pulling force applied to the second pulling portion 155 are the same or substantially the same, and it is avoided that the first pulling portion 153 or the second pulling portion 155 is subjected to uneven force, so that the first pulling portion 153 or the second pulling portion 155 subjected to larger force is broken, which may cause a bending function failure or even cause an operation accident.

It will be appreciated that in order to better reduce the sliding resistance and friction between the pulling member 150 and the fixed portion 131 and minimize the initial force difference between the first pulling portion 153 and the second pulling portion 155, in other embodiments, the fixed portion 131 includes an arcuate end surface, the mounting portion 151 of the pulling member 150 abuts the arcuate end surface of the fixed portion 131, and the first pulling portion 153 and the second pulling portion 155 are parallel to each other. Alternatively, in other embodiments, the fixing portion 131 includes an arc-shaped end surface, and the intersection point of the extension lines of the first pulling portion 153 and the second pulling portion 155 is on the central axis of the arc-shaped end surface. In these embodiments, based on the same reason, from the principle of the force analysis, the component forces of the pushing force of the fixing portion 131 on the mounting section 151 in the linear directions of the first pulling section 153 and the second pulling section 155 are substantially the same, or the difference between the component forces of the pushing force in the linear directions of the first pulling section 153 and the second pulling section 155 is not large, so that the difference between the initial force of the first pulling section 153 and the initial force of the second pulling section 155 is not large. Therefore, in the process of operating the adjusting member 130, when the forces applied to the positions of the adjusting member 130 are not uniform, so that the pushing forces of the fixing portion 131 on the first pulling portion 153 and the second pulling portion 155 are not uniform, the force difference only drives the first pulling portion 153 or the second pulling portion 155 to slide around the arc-shaped end surface of the fixing portion 131 to a small extent, so that the component forces applied to the first pulling portion 153 and the second pulling portion 155 are the same. That is to say, as long as can finely tune can guarantee that first section 153 and the second of pulling are pull the pulling force that section 155 received the same, avoided first section 153 or the second of pulling to pull shaking and the friction that section 155 slided the lead to by a wide margin, improved experience sense and the life who pulls piece 150. Moreover, the arc-shaped end surface of the fixing portion 131 is smooth, so that the sliding resistance and friction between the pulling member 150 and the fixing portion 131 can be further reduced, and the service life of the sheath 100 can be increased.

In other embodiments, referring to fig. 2 to fig. 3, the adjusting element 130 further includes an adjusting body 135 and an adjusting block 137, the adjusting block 137 is provided with a fixing portion 131, and the adjusting body 135 is movably connected to the adjusting block 137, so that the adjusting block 137 and the adjusting body 135 can move relatively, and the fixing portion 131 and the adjusting body 135 move relatively. That is to say, the fixing portion 131 is disposed on the adjusting block 137, and the adjusting block 137 movably connected to the adjusting block 135 can move relatively along the adjusting block 135 by operating and rotating the adjusting block 135, so that the fixing portion 131 disposed on the adjusting block 137 moves relatively to the adjusting block 135, and further drives the traction member 150 to move relatively to the tube body 110 in the axial direction, and the force and displacement generated by operating and controlling the adjusting block 135 are transmitted to the traction member 150 through the fixing portion 131, and further transmitted to the distal end 111 of the tube body 110 through the traction member 150, so as to drive the distal end 111 of the tube body 110 to bend, thereby achieving bending adjustment of the sheath tube 100.

Specifically, in some embodiments, there may be a lead screw connection between adjustment body 135 and adjustment block 137. For example, a ball screw connection may be provided, adjustment block 137 may be considered a screw shaft, adjustment body 135 may be considered a screw nut, and a ball may be disposed between adjustment block 137 and adjustment body 135 to provide a ball screw connection between adjustment body 135 and adjustment block 137. Through the collocation setting of ball and regulating body 135 and regulating block 137, regulating body 135 and regulating block 137 roll contact, have reduced the resistance when regulating block 137 moves along regulating body 135 relatively.

In this embodiment, the adjusting body 135 includes a cavity 1351, and the cavity 1351 is internally threaded. Adjusting block 137 is slidably received within inner chamber 1351 and adjusting block 137 is provided with external threads. Adjustment block 137 and adjustment body 135 are slidably coupled via internal and external threads. When sheath 100 needs to be bent, adjusting body 135 can only rotate along the axis thereof, at this moment, the internal and external threads of adjusting block 137 and adjusting body 135 are mutually matched, so that adjusting block 137 moves relatively along adjusting body 135, and then traction piece 150 is driven to move relatively to tube body 110 in the axial direction, the force and displacement generated by controlling adjusting body 135 are transmitted to distal end 111 of tube body 110 through traction piece 150, distal end 111 of tube body 110 is driven to bend, and bending of sheath 100 is realized.

Referring to fig. 5, fig. 5 is a partial sectional view of the structure of fig. 1. The tube 110 is provided with at least one pulling member channel 113, the first pulling section 153 and the second pulling section 155 of the pulling member 150 are received in the pulling member channel 113, and the free ends of the first pulling section 153 and the second pulling section 155 are fixed to the pulling member channel 113. In one embodiment, the sidewall of the tube 110 includes two pulling member channels 113, the two pulling member channels 113 are axially parallel, and the first pulling portion 153 and the second pulling portion 155 are disposed in the pulling member channels 113 and extend axially through the sidewall of the tube 110; the free ends of the first pulling portion 153 and the second pulling portion 155 are fixedly connected to the distal end 111 of the tube 110 in the pulling member channel 113, so as to fixedly connect the pulling member 150 to the distal end 111 of the tube 110. By providing two pulling member channels 113, the first pulling section 153 and the second pulling section 155 are prevented from being twisted or rubbed during the bending action of the sheath 100.

It is understood that the wall thickness of the tubular body 110 can be specifically set according to the size and shape of the pulling member 150 actually used, and is not limited herein.

The utility model provides a sheath tube which is different from the prior art, and comprises a tube body, an adjusting piece and a traction piece; the tube body comprises a bendable distal end; the traction piece comprises a first traction section, an installation section and a second traction section which are arranged in sequence; the adjusting piece comprises a fixing part; wherein, the free ends of the first traction section and the second traction section are fixed at the far end, and the mounting section is movably arranged on the fixing part. Controlling the regulating part and coming the pulling to draw the in-process that the piece realized that the sheath pipe was transferred and is bent, controlling power and displacement that the regulating part produced and passing through the fixed part and transmitting to drawing the piece, the first section of drawing that makes to draw and the second section of drawing are to the tubular body removal in the axial, then transmit the distal end to the tubular body with this power and displacement to drive the distal end of tubular body crooked, realize transferring of sheath pipe and bend. In the process of controlling the regulating part, when the atress everywhere of regulating part is uneven to lead to the fixed part to draw the section with the second when the driving force of section is uneven to first drawing, because the at least partial installation section of drawing the piece can slide around at least partial fixed part, poor can drive first section or the second of drawing and draw the section and slide around the fixed part, draw the pulling force that the section received until first section and the second of drawing is the same. Therefore, the sheath tube provided by the utility model is movably arranged on the fixing part by utilizing the mounting section, the tension on the first traction section and the second traction section can be balanced, and the first traction section or the second traction section which is stressed greatly is prevented from being broken due to uneven stress on the first traction section or the second traction section, so that the bending adjusting function is failed and even an operation accident is caused.

The utility model also provides an interventional instrument conveying device. The interventional device delivery apparatus includes the sheath 100 of any of the embodiments described above. The sheath 100 has the above-mentioned condition for preventing the pulling member 150 from being broken during the bending operation of the sheath 100, thereby causing the failure of the bending function of the sheath 100. The interventional device conveying device provided by the utility model also has the corresponding effects.

The utility model also provides a conveying system. The delivery system includes the sheath 100 of any of the embodiments described above. The sheath 100 has the above-mentioned condition for preventing the pulling member 150 from being broken during the bending operation of the sheath 100, thereby causing the failure of the bending function of the sheath 100. The conveying system provided by the utility model also has the corresponding effects.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sheath, comprising:

a tube body including a bendable distal end;

the traction part comprises a first traction section, an installation section and a second traction section which are sequentially arranged; the method is characterized in that:

the adjusting piece comprises a fixing part; wherein the content of the first and second substances,

the free ends of the first traction section and the second traction section are fixed at the far end and drive the far end to bend under the driving of the adjusting piece;

the mounting section is movably arranged on the fixing part, and at least part of the mounting section is driven by the adjusting piece to slide around at least part of the fixing part.

2. The sheath of claim 1,

the adjusting piece is internally provided with a through groove, the fixing part is formed by protruding the inner wall of the through groove, and the mounting section is accommodated in the through groove and sleeved on the fixing part.

3. The sheath of claim 2,

a channel is formed between at least one part of the side wall of the fixing part and the inner wall of the through groove, and the first traction section and the second traction section are respectively and slidably accommodated in the channel;

at least one part of the side wall of the fixing part is arc-shaped; the mounting section and at least one part of the side wall are mutually supported in a sliding manner.

4. The sheath of claim 1,

the fixed part comprises an arc-shaped end face, and the installation section can slide around the arc-shaped end face under the driving of the adjusting piece.

5. The sheath of claim 1,

the first traction section and the second traction section are parallel to each other along the axial direction of the pipe body; alternatively, the first and second electrodes may be,

the intersection point of the extension lines of the first traction section and the second traction section is on the central axis of the fixing part.

6. The sheath of claim 1,

the fixing part comprises a pulley, and the mounting section is movably sleeved on the pulley.

7. The sheath according to any one of claims 1 to 6,

the adjusting part further comprises an adjusting body and an adjusting block movably connected with the adjusting body, the fixing part is arranged on the adjusting block, and the adjusting block and the adjusting body can move relatively.

8. The sheath according to any one of claims 1 to 6,

the pipe body is provided with at least one traction piece channel, the traction piece channel extends along the axial direction of the pipe body, the first traction section and the second traction section are contained in the traction piece channel, and the free ends of the first traction section and the second traction section are fixed on the traction piece channel.

9. An interventional device delivery apparatus, comprising the sheath of any one of claims 1-8.

10. A delivery system comprising a sheath according to any one of claims 1 to 8.