CN216090610U

CN216090610U - Double-plane adjustable bent sheath tube

Info

Publication number: CN216090610U
Application number: CN202122257511.XU
Authority: CN
Inventors: 阮成民; 肖建平; 翟梦林
Original assignee: Guangdong Pulse Medical Technology Co ltd
Current assignee: Guangdong Pulse Medical Technology Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-03-22
Anticipated expiration: 2031-09-16

Abstract

The application relates to the technical field of medical instruments, in particular to a biplane bending-adjustable sheath tube, which comprises a sheath tube and at least two bending-adjusting mechanisms, wherein each bending-adjusting mechanism comprises a rotating member, a moving member and an installation member; wherein the mounting member is mounted outside the sheath tube; the moving component is connected with the mounting component in a sliding way; the rotating member is arranged outside the moving member and is in threaded connection with the moving member; the displacement member is connected to the sheath via a traction element; the moving members of the at least two bending adjusting mechanisms are exposed to the openings of the mounting members, and the openings of the mounting members of the at least two bending adjusting mechanisms face different directions. This curved sheath pipe of biplane adjustable can reach the purpose that the biplane was transferred curved, can transfer curved release apparatus behind the suitable position with the head end of sheath pipe, satisfies the input requirement, transfers curved scope wider, and the suitability is better, can adjust crooked degree through rotatory range moreover for transfer curved precision higher.

Description

Double-plane adjustable bent sheath tube

Technical Field

The application relates to the technical field of medical equipment, in particular to a biplane adjustable bending sheath tube.

Background

Currently, medical sheaths are widely used in minimally invasive interventional diagnostic and therapeutic procedures for creating channels, delivering or retrieving medical devices, infusing drugs, or removing bodily fluids. The adjustable bending sheath tube has a far-end adjustable bending function, namely the position of the far-end sheath tube head can be controlled through the adjustable bending structure, the adjustable bending sheath tube is suitable for various cardiovascular diseases, the lesion position can be quickly and accurately reached, and the operation time is shortened. But most of the adjustable bent sheaths in the existing market are monotonous bent sheaths, the functions are single, but the problems of limited controllable range and low precision exist, and the application range is small.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a biplane adjustable curved sheath pipe, solved to a certain extent that the adjustable curved sheath pipe that exists among the prior art is dull curved sheath pipe more, the function singleness, but has the controllable scope limited, problem that the precision is not high, application scope is little technical problem.

The application provides a biplane adjustable curved sheath pipe includes: the sheath tube and the at least two bending adjusting mechanisms are arranged, and each bending adjusting mechanism comprises a rotating member, a moving member and a mounting member; wherein the mounting member is mounted to an exterior of the sheath; the moving member is slidably connected with the mounting member;

the rotating member is arranged outside the moving member and is in threaded connection with the moving member;

the moving member is connected to the sheath via a tractor;

the moving members of at least two bending adjusting mechanisms are exposed to the openings of the mounting members, and the openings of the mounting members of at least two bending adjusting mechanisms face different directions.

In the above technical solution, further, 2 the biplane adjustable bending sheath further includes a pulling auxiliary member, the pulling auxiliary member is disposed in the sheath and connected to the sheath, and the pulling auxiliary member is connected to the moving member via the pulling member.

In any one of the above technical solutions, further, the rotating member includes a holding rotating portion, a connecting portion, and a screw driving portion, which are connected in sequence; the screw thread driving part is of a semi-cylindrical shell structure, and the mounting component is arranged in the hollow part of the screw thread driving part;

the screw driving part is in threaded connection with the moving component; the connecting part is arranged on the outer wall of the screw thread driving part and extends along the circumferential direction of the screw thread driving part;

the rotating part that grips is for being the cylindric shell structure of convergent, just the outer wall of the rotating part that grips is provided with anti-skidding line.

In any of the above technical solutions, further, the two bending adjusting mechanisms are respectively a first bending adjusting mechanism and a second bending adjusting mechanism, and the first bending adjusting mechanism and the second bending adjusting mechanism are arranged at intervals along the length direction of the sheath tube.

In any of the above technical solutions, further, the biplane bending-adjustable sheath further includes a connection housing, and the connection housing is covered outside the screw thread driving portion of the rotating member of the first bending-adjusting mechanism and the screw thread driving portion of the rotating member of the second bending-adjusting mechanism;

one end of the connecting shell is abutted against one end part of a holding rotating part of a rotating component of the first bending adjusting mechanism; the other end of the connecting shell abuts against one end of a holding rotating part of a rotating component of the second bending adjusting mechanism;

the connecting shell is respectively clamped with the thread driving part of the rotating member of the first bending adjusting mechanism and the thread driving part of the rotating member of the second bending adjusting mechanism;

the connecting shell is of a structure with two convex sides and a concave middle part.

In any of the above technical solutions, further, the biplane adjustable bending sheath further includes a tail housing, an end of the tail housing abuts against the rotating member of the second bending adjustment mechanism, and the tail housing is clamped with the mounting member of the second bending adjustment mechanism.

In any of the above technical solutions, further, the biplane adjustable curved sheath further includes a stress dissipation sleeve head and a nose end member both sleeved outside the sheath;

the stress dispersion sleeve head and the nose end component are sequentially arranged in front of the first bending adjusting mechanism along the length direction of the sheath tube, and the nose end component is arranged close to the first bending adjusting mechanism;

the stress dispersion sleeve head and the nose end component are clamped together; the nose end component is clamped with the mounting component of the first bending adjusting mechanism.

In any of the above technical solutions, further, the mounting member includes a mounting column and a clamping ring portion, the clamping ring portion is disposed at one end of the mounting column and extends along a circumferential direction of the mounting column, and a clamping groove is formed at the other end of the mounting column opposite to the mounting column; the two opposite side parts of the mounting column body are respectively provided with a mounting groove extending along the length direction of the mounting column body, and the bottom wall of the mounting groove is provided with an avoiding opening;

the movable component comprises a body and a guide part which are connected, the body is arranged in one of the mounting grooves, and the guide part is inserted in the avoidance port; an external thread is formed on one side of the body, which is far away from the guide part; the body is provided with mounting holes which penetrate through two side parts of the body along the length direction of the body and are used for the traction piece to pass through.

In any one of the above technical solutions, further, the mounting member further includes a limiting protrusion portion, the limiting protrusion portion is disposed on the bottom wall of the mounting groove, which is provided with the avoiding opening.

In any of the above technical solutions, further, the rotating member includes a first rotating housing and a second rotating housing, and the first rotating housing and the second rotating housing are inserted together; and/or

The traction auxiliary component is a ring body arranged between the inner layer and the middle layer of the sheath tube, and the ring body is provided with a mounting hole for connecting the traction piece;

the distraction assistance member is formed from one of stainless steel, nickel titanium, platinum iridium, and tantalum; and/or

The outer surface of a part of structure of the traction piece positioned in the sheath tube is coated with a protective layer; and/or

The number of the moving members of any bending adjusting mechanism is two, the two moving members are symmetrically arranged on two opposite side parts of the mounting member, and the two moving members are respectively connected with two side parts of the traction auxiliary member through the traction piece.

Compared with the prior art, the beneficial effect of this application is:

this curved sheath pipe of biplane adjustable can reach the purpose that the biplane was transferred curved, can transfer curved release apparatus behind the suitable position with the head end of sheath pipe, satisfies the input requirement, transfers curved scope wider, and the suitability is better, can adjust crooked degree through rotatory range moreover for transfer curved precision higher.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a biplane adjustable curved sheath according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a biplane adjustable curved sheath according to an embodiment of the present disclosure;

fig. 3 is a partial cross-sectional view of a bi-planar adjustable curved sheath according to an embodiment of the present application;

fig. 4 is a schematic partial structural view of a biplane adjustable curved sheath according to an embodiment of the present application;

fig. 5 is a schematic partial structure view of a bi-planar adjustable sheath according to an embodiment of the present application;

fig. 6 is a schematic partial structure view of a bi-planar adjustable sheath according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a rotating member according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a mounting member according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a first moving member according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a connection housing according to an embodiment of the present application;

FIG. 11 is a schematic structural view of a nose piece according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a tail housing according to an embodiment of the present application;

fig. 13 is a schematic partial structural view of a biplane adjustable bending sheath according to a second embodiment of the present application;

fig. 14 is a schematic structural view of another part of the biplane adjustable bending sheath according to the second embodiment of the present application.

Reference numerals:

1-a first bending adjusting mechanism, 2-a second bending adjusting mechanism, 3-a rotating member, 31-a first knob left, 32-a first knob right, 33-a second knob left, 34-a second knob right, 35-a holding rotating part, 36-a connecting part, 37-a thread driving part, 371-a combined thread, 4-a moving member, 41-a body, 411-a mounting hole, 42-a guiding part, 5-a first moving member, 6-a second moving member, 7-a first sliding block, 8-a second sliding block, 9-a third sliding block, 10-a fourth sliding block, 11-a mounting member, 111-a mounting column, 112-a clamping ring part, 113-a first clamping groove, 114-an avoiding opening, 115-a limiting protruding part and 116-a mounting groove, 117-first slider mount, 118-second slider mount, 12-traction aid, 121-first mount, 122-second mount, 13-connecting shell, 131-shell left, 132-shell right, 133-boss, 134-second slot, 14-tail shell, 141-tail left shell, 142-tail right shell, 143-inner stiffener, 144-overhanging boss, 145-side plate, 146-first end plate, 147-second end plate, 15-stress dissipation sleeve head, 16-nose component, 161-nose left, 162-nose right, 163-third slot, 17-hemostatic valve, 18-connecting tube, 19-three-way valve, 20-sheath, 21-traction wire, 211-a first pull wire, 212-a second pull wire.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.

The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A biplane adjustable bending sheath according to some embodiments of the present application is described below with reference to fig. 1-14.

Example one

Referring to fig. 1 to 6, an embodiment of the present application provides a biplane adjustable bending sheath, including: a sheath 20 and a bend-adjusting mechanism including a rotating member 3, a first moving member 5, a second moving member 6, a mounting member 11, and a drag-assist member 12; wherein, the mounting member 11 is sleeved outside the sheath tube 20; the first moving member 5 and the second moving member 6 are both connected with the mounting member 11 in a sliding manner;

the rotating member 3 is arranged outside the first moving member 5 and the second moving member 6, and is reversely screwed with the first moving member 5 and the second moving member 6;

the drag assisting member 12 is disposed in the sheath 20 and connected to the sheath 20, two side portions of the drag assisting member 12 are respectively connected to the first moving member 5 and the second moving member 6 in a one-to-one correspondence manner by a traction element such as a traction wire 21 (hereinafter, the traction element is also exemplified as the traction wire 21), that is, one side portion of the drag assisting member 12 is connected to the first moving member 5 by one traction wire 21, the other side portion of the drag assisting member 12 is connected to the second moving member 6 by another traction wire 21, that is, one traction wire 21 is respectively connected to the first moving member 5 and the second moving member 6. Note that, the drag assisting member 12 may not be provided here, and the traction wire 21 may be directly connected to the sheath 20.

The number of the bending adjusting mechanisms is two, the two bending adjusting mechanisms are respectively a first bending adjusting mechanism 1 and a second bending adjusting mechanism 2, the first bending adjusting mechanism 1 and the second bending adjusting mechanism 2 are arranged at intervals along the length direction of the sheath tube 20, a first moving member 5 and a second moving member 6 of one bending adjusting mechanism are arranged at intervals in a first plane, a first moving member 5 and a second moving member 6 of the other bending adjusting mechanism are arranged at intervals in a second plane, and the second plane forms an angle with the first plane. Note that the lengths of the wires 21 are different, and specifically, after the sheath 20 is bent, the length of the wire 21 on the inner side of the bend < the length of the wire 21 on the non-bend side < the length of the wire 21 on the outer side of the bend.

It is preferable that the first plane is a horizontal plane and the second plane is a vertical plane, which will be exemplified hereinafter, but it should be noted that the first plane and the second plane are not limited to the above setting, and can be selected according to actual needs.

Note that the number of the bending adjusting mechanisms and the orientation of the bending adjusting mechanisms are not limited to the above, and the bending adjusting mechanisms may be arranged according to actual needs.

In order to distinguish the first moving member 5 and the second moving member 6 of the first bend adjusting mechanism 1, and the first moving member 5 and the second moving member 6 of the second bend adjusting mechanism 2, the following names are given: the first moving member 5 of the first bending adjusting mechanism 1 is also called a first slide block 7, the second moving member 6 of the first bending adjusting mechanism 1 is also called a second slide block 8, the first moving member 5 of the second bending adjusting mechanism 2 is also called a third slide block 9, and the second moving member 6 of the second bending adjusting mechanism 2 is also called a fourth slide block 10. Note that the first sliding block 7 and the second sliding block 8 of the first bending adjustment mechanism 1 are both disposed in the corresponding mounting grooves 116 of the first sliding block fixing member 117, and the openings of the two mounting grooves 116 are both oriented in the horizontal direction, so that bending adjustment in the horizontal plane can be realized; the third sliding block 9 and the fourth sliding block 10 of the second bending adjusting mechanism 2 are both arranged in the corresponding mounting grooves 116 of the second sliding block fixing member 118, and the openings of the two mounting grooves 116 are both towards the vertical direction, so that bending adjustment in the vertical plane can be realized.

The working principle of the biplane adjustable bending sheath tube is as follows:

the process of bending the sheath 20 in the horizontal plane is as follows:

by rotating the rotating member 3 of the first bend adjusting mechanism 1, the first moving member 5, that is, the first sliding block 7, and the second moving member 6, that is, the second sliding block 8, in the first plane are forced to move in opposite directions, so that the drawing wire 21 on one side is loosened, the drawing wire 21 on one side is tightened, the stress on the two sides of the sheath tube 20 is unbalanced, and the sheath tube 20 is bent in the horizontal plane, that is, bidirectional bending which is bent leftward or rightward in the horizontal plane can be realized.

The bending process in the vertical plane is as follows:

by rotating the rotating member 3 of the second bend adjusting mechanism 2, the first moving member 5, that is, the third sliding block 9, and the second moving member 6, that is, the fourth sliding block 10 in the second plane are forced to move in opposite directions, so that the drawing wire 21 on one side is loosened, the drawing wire 21 on one side is tightened, the stress on the two sides of the sheath tube 20 is unbalanced, and the sheath tube 20 is bent in the vertical plane, that is, the bidirectional bending of bending upwards or downwards in the vertical plane can be realized.

Based on the above description, this biplane can be transferred curved sheath pipe and can be reached the purpose that the biplane was two-way transferred curved, can transfer curved release apparatus behind suitable position with the head end of sheath pipe 20, satisfy and put in the requirement, transfer curved scope wider, the suitability is better, can adjust crooked degree through rotatory range moreover for transfer curved precision higher.

In this embodiment, preferably, as shown in fig. 7, the rotating member 3 includes a grip rotating portion 35, a connecting portion 36, and a screw driving portion 37 connected in this order; wherein, the screw driving portion 37 is a semi-cylindrical shell structure, and the mounting member 11 is disposed in the hollow inside of the screw driving portion 37;

the screw driving portion 37 is screwed with the first moving member 5 or the second moving member 6, and specifically, the inner wall surface of the screw driving portion 37 is formed with two screws, i.e., combination screws 371, with opposite rotation directions, for example: the first sliding block 7 is also a left sliding block and is meshed with the clockwise thread, the second sliding block 8 is also a right sliding block and is meshed with the anticlockwise thread, when the knob is rotated clockwise, the left sliding block moves backwards, the right sliding block moves forwards, and the moving directions of the left sliding block and the right sliding block are opposite.

The connecting portion 36 is provided on an outer wall of the screw driving portion 37 and extends along a circumferential direction of the screw driving portion 37;

grip rotating part 35 is for being the cylindric shell structure of convergent, and the outer wall that grips rotating part 35 is provided with anti-skidding line, and the medical aseptic gloves of need dressing during the doctor's operation, and is more smooth, grips the line on rotating part 35 surface and has increased and revolve to frictional force, makes the operation easier.

According to the above-described structure, the doctor holds the holding and rotating portion 35 by hand, rotates the holding and rotating portion 35, and then sequentially pushes the connecting portion 36 and the screw driving portion 37 to rotate, and since the first moving member 5, the second moving member 6 and the screw driving portion 37 are screwed to rotate, the above-described rotational motion is converted into the linear motion of the first moving member 5 and the second moving member 6 along the longitudinal direction of the sheath tube 20, and note that the first moving member 5 and the second moving member 6 located in the same plane are moved in opposite directions at this time.

In this embodiment, preferably, as shown in fig. 2 and 4, the rotating member 3 includes a first rotating housing and a second rotating housing, and the first rotating housing and the second rotating housing are plugged together to facilitate operation and maintenance.

Preferably, one of the first rotating housing and the second rotating housing is formed with a plugging column, and the other of the first rotating housing and the second rotating housing is formed with a plugging hole, and the plugging column can be plugged in the plugging hole.

As can be seen from the above description, for the sake of convenience of distinction, the first rotary housing of the rotary member 3 of the first bend-adjusting mechanism 1, the second rotary housing of the rotary member 3 of the first bend-adjusting mechanism 1, the first rotary housing of the rotary member 3 of the second bend-adjusting mechanism 2, the second rotary housing of the rotary member 3 of the second bend-adjusting mechanism 34.

In this embodiment, preferably, as shown in fig. 5, 6 and 8, the mounting member 11 includes a mounting column 111 and a snap ring portion 112, the snap ring portion 112 is disposed on an outer side wall of one end of the mounting column 111 and extends along a circumferential direction of the mounting column 111, and a side wall of the other opposite end of the mounting column 111 is opened with a snap groove;

mounting grooves 116 extending along the length direction of the mounting column 111 are formed in two opposite side portions of the mounting column, and the mounting grooves 116 penetrate through the clamping ring portion 112; the bottom wall of the mounting groove 116 is provided with an avoiding opening 114;

the first moving member 5 comprises a body 41 and a guide part 42 which are connected, the body 41 is arranged in one of the mounting grooves 116, and the surface of the body 41 with threads is exposed out of the opening of the mounting groove 116. it is noted that, because the moving directions of the sliding members on two sides of the same plane are opposite when the rotating member 3 rotates, the first moving member 5 and the second moving member 6 are both required to be in the middle of the mounting groove 116 for a distance for moving back and forth;

the guide portion 42 is inserted into the escape opening 114; a male thread is formed on one side of the body 41 far away from the guide part 42;

the body 41 is provided with a mounting hole 411 which penetrates through two side parts of the body 41 along the length direction, one end of the traction wire 21 is tied up to abut against the outer side part of the body 41 (certainly, the traction wire 21 can be fixed on the body 41 of the first moving component 5 in an adhesive mode without being limited thereto), the traction wire 21 sequentially extends forwards through the mounting hole 411 and the avoiding port 114 and enters from a hole formed in the sheath tube 20, extends along the middle layer and the innermost layer of the sheath tube 20 and is finally connected with the side part of the corresponding traction auxiliary component 12, and the end can be knotted or adhered.

Therefore, the structure of the avoiding opening 114 is adopted, so that when the traction wire 21 is pulled, the problem that the service life of the traction wire 21 is shortened due to friction between the traction wire 21 and the bottom wall of the slideway is avoided. In addition, the escape opening 114 serves to guide the guide portion 42, ensuring its linear movement.

Note that the second moving member 6 and the first moving member 5 are symmetrically disposed about the mounting member 11, and thus the structure thereof can be referred to the first moving member 5, and will not be described in detail.

Wherein, preferably, the mounting member 11 and the snap ring portion 112 are of an integral structure.

In this embodiment, preferably, as shown in fig. 2, 4 and 10, the biplane adjustable bending sheath further includes a connecting housing 13, and the connecting housing 13 is covered outside the screw driving part 37 of the rotating member 3 of the first bending adjusting mechanism 1 and the screw driving part 37 of the rotating member 3 of the second bending adjusting mechanism 2;

one end of the connecting housing 13 abuts against one end of the holding and rotating part 35 of the rotating member 3 of the first bend adjusting mechanism 1; the other end of the connecting housing 13 abuts against one end of the holding and rotating part 35 of the rotating member 3 of the second bend adjusting mechanism 2;

the connecting shell 13 is respectively connected with the screw thread driving part 37 of the rotating member 3 of the first bending adjusting mechanism 1 and the screw thread driving part 37 of the rotating member 3 of the second bending adjusting mechanism 2 in a clamping manner, specifically, an annular boss 133 is formed on the inner wall of the connecting shell 13, the boss 133 is clamped in an annular clamping groove formed at the tail part of the mounting member 11 of the first bending adjusting mechanism 1, namely, a first clamping groove 113, and the side part of the boss 133 abuts against one end of the screw thread driving part 37 of the first bending adjusting mechanism 1;

an annular clamping groove, namely a second clamping groove 134, is formed on the inner wall of the connecting shell 13, and the clamping ring portion 112 of the head portion of the mounting member 11 of the second bending adjusting mechanism 2 is clamped in the second clamping groove 134, note that the boss 133 structure can also be used as a reinforcing rib, so as to improve the strength.

According to the above-described structure, the connecting housing 13 not only covers and protects the first bending adjustment mechanism 1 and the second bending adjustment mechanism 2, but also provides a support surface for holding the hand.

The connecting shell 13 is of a structure with two convex sides and a concave middle part, and accords with human engineering, so that the hand is more comfortable to hold.

Wherein, preferably, the connection housing 13 comprises a first connection housing 13, namely a left housing 131, and a second connection housing 13, namely a right housing 132, which are plugged together, specifically, one of the first connection housing 13 and the second connection housing 13 is formed with a plugging column, and the other of the first connection housing 13 and the second connection housing 13 is formed with a plugging hole, in which the plugging column can be plugged.

In this embodiment, preferably, as shown in fig. 2 to 4 and 12, the biplane bending adjustable sheath further includes a tail housing 14, an end of the tail housing 14 abuts against the rotating member 3 of the second bending adjusting mechanism 2, and the tail housing 14 is snapped together with the mounting member 11 of the second bending adjusting mechanism 2.

Note that, a hemostatic valve 17 is further connected to the rear end of the sheath 20, and the tail housing 14 covers the hemostatic valve 17 to seal the tail of the sheath 20 and to mount the hemostatic valve 17.

Preferably, the screw driving portion 37 of the rotating member 3 of the first bending adjustment mechanism 1 is provided with an annular groove, the tail housing 14 includes a side plate 145, a first end plate 146 and a second end plate 147, one end of the side plate 145 is connected to the first end plate 146, the other end of the side plate 145 is connected to the second end plate 147, and the first end plate 146 is clamped in the annular groove.

Preferably, the tail shell 14 includes a first tail shell 14, namely a left tail shell 141, and a second tail shell 14, namely a right tail shell 142, which are connected together relatively, so as to facilitate operation and maintenance.

In this embodiment, preferably, as shown in fig. 2 to 4 and 11, the biplane adjustable bending sheath further comprises a stress-dissipating cuff 15 and a nose member 16 both fitted around the exterior of the sheath 20;

wherein, the stress dispersion sleeve head 15 and the nose end component 16 are sequentially arranged in front of the first bending adjusting mechanism 1 along the length direction of the sheath tube 20, and the nose end component 16 is arranged close to the first bending adjusting mechanism 1;

the stress dispersion sleeve head 15 and the nose end component 16 are clamped together; the nose end member 16 is clamped with the mounting member 11 of the first bend adjusting mechanism 1, and specifically, a third clamping groove 163 is formed on the inner wall of the nose end member 16, and a clamping ring part 112 of the mounting member 11 of the first bend adjusting mechanism 1, which will be described below, is clamped in the clamping groove.

According to the structure described above, the stress dispersion sleeve head 15, the nose end member 16 and the second bending adjustment mechanism 2 are assembled together in a limited manner, so that the first bending adjustment mechanism 1 is axially limited.

In this embodiment, preferably, as shown in fig. 8, the mounting member 11 further includes a limiting protrusion 115, and the limiting protrusion 115 is disposed on the bottom wall of the mounting groove 116, in which the avoiding opening 114 is opened.

According to the above-described structure, the limiting protrusion 115 functions to limit the first moving member 5 or the second moving member 6, so as to prevent the first moving member from being bent excessively, or to enable the first moving member to be bent at a predetermined angle, and thus the limiting protrusion has a wider application range and stronger controllability.

In this embodiment, as shown in fig. 4, the pulling auxiliary member 12 is preferably a ring body disposed between the inner layer and the middle layer of the sheath 20, and the ring body is opened with a mounting hole 411 for connecting the pulling wire 21, so that the sheath 20 can be driven to bend by pulling the pulling wire 21, and for convenience of distinguishing the two ring bodies, the two ring bodies are named as a first fixing ring 121 and a second fixing ring 122.

In this embodiment, the pulling wire 21 is preferably covered with a protective layer, and specifically, a thin-walled tube of PTFE polymer is sleeved on a portion of the pulling wire 21 located inside the sheath tube 20.

To sum up, the detailed structure of the biplane adjustable bending sheath is as follows:

the sheath 20 is used as a main conveying channel of the minimally invasive interventional operation and has a three-layer structure, wherein the innermost layer is a high polymer material with low friction coefficient such as a PTFE inner layer, and medical instruments can pass through the innermost layer conveniently; the middle layer is a spring wound by a metal round wire or a flat wire, a stainless steel round wire or a flat wire is a woven layer or a hypotube cut by a metal pipe material in a mode of pressing one single wire or pressing two wires, and the flexibility and the bending resistance are good, so that bending adjustment is convenient; the outmost layer is made of high polymer materials with different hardness, such as TPU, Pebax or nylon, and the pushing performance is improved.

The traction wire 21 is generally positioned between the middle layer and the innermost layer, double strands or multi-strand stainless steel wires and nickel-titanium wires are selected, the multi-strand traction wire 21 can prevent the bending function failure caused by the fracture of a single wire, and the outer layer is coated with high polymer materials with low friction coefficients such as PTFE.

The fixing rings of the traction wire 21, namely the traction auxiliary component 12 and the developing ring (not shown), are embedded at different positions of the distal end of the sheath tube 20, the fixing rings of the traction wire 21 are used for fixing the traction wire 21, the developing ring is convenient for a doctor to observe whether the head end position of the sheath tube 20 reaches a lesion position through CT or ultrasound in the operation process, platinum iridium or tantalum is generally adopted, the fixing rings of the traction wire 21 can be made of stainless steel or nickel titanium materials, and the developing ring can be replaced by the developing material platinum iridium or tantalum, so that the structure of the sheath tube 20 is more compact.

The stress dispersing sleeve head 15 is used for reducing stress generated at the joint of the sheath tube 20 and the handle during bending adjustment, so as to avoid the bending phenomenon of the sheath tube 20, and the material is formed by injection molding of high polymer materials with good elasticity and low hardness, such as TPU, Pebax, nylon, silica gel and the like, so that the stress generated at the joint of the sheath tube 20 and the handle is dispersed.

The main parts of the first moving member 5, the second moving member 6, the mounting member 11, the rotating member 3, the nose member 16, the tail housing 14, the connecting housing 13, the hemostatic valve 17 and the like are mainly formed by injection molding of ABS or ABS + PC, so that the precision, the strength and the stability are better, and the assembly requirement and the use requirement can be met.

The nose end component 16 includes a nose end left 161 and a nose end right 162, which are mainly used to fix the stress dispersion sleeve head 15 and the first sliding block fixing piece 117, that is, the mounting component 11 of the first bending adjustment mechanism 1, and the first knob left 31, the first knob right 32, the second knob left 33, and the second knob right 34 are mainly used to control the sliding positions of the first sliding block 7, the second sliding block 8, the third sliding block 9, and the fourth sliding block 10 on the corresponding fixing pieces.

The left shell 131 and the right shell 132 are mainly used for fixing parts such as the left first knob 31, the right first knob 32, the left second knob 33, the right second knob 34, the first sliding block fixing piece 117 which is the mounting member 11 of the first bending adjusting mechanism 1, and the second sliding block fixing piece 118 which is the mounting member 11 of the second bending adjusting mechanism 2, and protecting internal parts.

The left and right rear shells 141 and 142 are mainly used for fixing the second sliding block fixing member 118 and the hemostatic valve 17.

The hemostatic valve 17 is connected with the three-way valve 19 through the connecting pipe 18, so that blood in the hemostatic pipe can be prevented from overflowing outside the body, blood loss is reduced, the operation difficulty is reduced, external gas can be prevented from entering the blood vessel, and the connecting pipe 18 is mainly composed of a TPE (thermoplastic elastomer) extrusion pipe.

The connection mode of the biplane adjustable bent sheath pipe described in the application is as follows: the sheath 20 and the hemostatic valve 17 are fixed by hot melting or gluing, and two ends of the connecting pipe 18 are glued with the hemostatic valve 17 and the three-way valve 19 respectively.

Stress dispersion pullover 15 passes sheath pipe 20, passes through the annular groove joint with the left 161 of nose together, and the left 161 rear side draw-in groove of nose is in the same place with the joint ring portion 112 joint of first sliding block mounting 117, drives first sliding block mounting 117 and rotates when preventing that first knob left side 31, second knob left side 33 from rotating and transfers curved effect to sheath pipe 20 and produce the influence. The guide part 42 of the first sliding block 7, namely the boss, is arranged in the slide way of the first sliding block fixing piece 117 and can freely slide in the slide way, and the two ends of the slide way are provided with limiting convex parts 115; the outer side of the first sliding block 7 is connected with the first knob left 31 and the first knob right 32 through threads, and the first knob left 31 and the second knob right 34 can control the first sliding block 7 to move back and forth through rotation. The third slider 9 and the second slider fixing member 118 are connected to the second knob left 33 and the second knob right 34 in the same manner, except that the first slider fixing member 117 is provided on the left side and the second slider fixing member 118 is provided on the lower side. One end of the first traction wire 211 is fixed with the first fixing ring 121 at the distal end of the sheath tube 20, that is, the pulling auxiliary member 12 of the first bending adjustment mechanism 1, by welding or winding, and the other end is glued with the first sliding block 7 or welded together by a fixing block (not shown) after being led out from the sheath tube 20, and the traction wire 21 connected to the second sliding block 8 refers to the above structure;

one end of the second traction wire 212 is fixed to the second fixing ring 122 at the distal end of the sheath tube 20, that is, the pulling auxiliary member 12 of the second bend-adjusting mechanism 2, by welding or winding, and the other end is led out of the sheath tube 20 and then glued to the third sliding block 9 or welded to the third sliding block by a fixing block (not shown), and the traction wire 21 connected to the fourth sliding block 10 is referred to above structure.

The strengthening rib of the inboard of shell left 131, shell right 132 is used for leaning on, fixed first knob left 31, first knob right 32, second knob left 33, second knob right 34, the shell left side 131, the inboard boss 133 of shell right 132 passes through the rear side recess joint with first sliding block mounting 117 and is in the same place, the shell left side 131, the inboard recess of shell right 132 also is in the same place of joint ring portion 112 joint with the front side boss 133 of second sliding block mounting 118, it rotates to prevent that second knob left 33, drive second sliding block mounting 118 when second knob right 34 is rotatory.

The inner reinforcing ribs 143 and the outward protruding bosses 144 of the left and right tail shells 141 and 142 are used for fixing the hemostatic valve 17. In order to ensure the stability of the connection, the fixing connection part 36 can be fixed by gluing, for example, in the groove of the boss 133, so as to prevent the internal structure from being damaged.

The working principle of the biplane adjustable bending sheath described in the application is as follows:

the instrument is loaded into the sheath 20 (not shown), evacuation processing is performed through the three-way valve 19, the sheath 20 is guided to the vicinity of the lesion position through the guide catheter, and the position of the sheath 20 is observed by the distal end developing ring of the sheath 20 by ultrasound to determine the bend adjusting direction. The left 31 and the right 32 of the first knob are rotated, the first sliding block 7 and the second sliding block 8 are driven to move reversely in different slide ways of the first sliding block fixing piece 117 through threaded connection, and the first traction wire 211 is pulled by tensile force to pull the far end of the sheath tube 20 to bend to a required angle on a horizontal plane, so that the purpose of bending adjustment is achieved.

Similarly, the second knob left 33 and the second knob right 34 are rotated, and the second traction wire 212 pulls the distal end of the sheath tube 20 to bend at a required angle on a vertical plane, so that the purpose of bi-planar bidirectional bending adjustment is achieved. The head end of the sheath 20 is adjusted to be bent to a proper position, then the instrument is released, and then the first knob left 31, the first knob right 32, the second knob left 33 and the second knob right 34 are screwed back to the original positions, and the sheath 20 is withdrawn from the body.

Example two

The structure of the biplane adjustable bending sheath provided in this embodiment is substantially the same as that of the biplane adjustable bending sheath provided in the first embodiment, and the difference is only that: as shown in fig. 13 and 14, each of the first bending adjusting mechanism 1 and the second bending adjusting mechanism 2 of the present application includes only one moving member 4, and by using the moving member 4, a unidirectional direction in a preset plane can be realized, that is, the biplane adjustable bending sheath provided in this embodiment can realize a biplane unidirectional bending.

And note that: the inner wall of the screw driving portion 37 of the first and corresponding rotary member 3 only needs to be provided with a screw thread in one rotation direction, which is convenient for processing and manufacturing.

Second, the present biplane adjustable bending sheath needs to move the moving member 4 backward, so that the initial position of the moving member 4 is set at the leftmost end, in order to reduce the length of the internal thread of the rotating member 3, thereby reducing the length of the handle.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a biplane adjustable curved sheath pipe which characterized in that includes: the sheath tube and the at least two bending adjusting mechanisms are arranged, and each bending adjusting mechanism comprises a rotating member, a moving member and a mounting member; wherein the mounting member is mounted to an exterior of the sheath; the moving member is slidably connected with the mounting member;

the moving member is connected to the sheath via a tractor;

2. The biplane adjustable curved sheath of claim 1, further comprising a drag assist member disposed within the sheath and coupled to the sheath, the drag assist member coupled to the displacement member via the traction element.

3. The biplane adjustable bending sheath of claim 2, wherein the rotating member comprises a holding rotating part, a connecting part and a thread driving part which are connected in sequence; the screw thread driving part is of a semi-cylindrical shell structure, and the mounting component is arranged in the hollow part of the screw thread driving part;

4. The bi-planar adjustable bending sheath according to claim 3, wherein the two bending adjusting mechanisms are a first bending adjusting mechanism and a second bending adjusting mechanism, respectively, and the first bending adjusting mechanism and the second bending adjusting mechanism are spaced apart from each other along the length direction of the sheath.

5. The biplane adjustable bend sheath of claim 4, further comprising a connection housing that houses the threaded drive of the rotating member of the first bend adjustment mechanism and the threaded drive of the rotating member of the second bend adjustment mechanism;

6. The biplane adjustable bend sheath of claim 4, further comprising a tail housing, an end of the tail housing abutting against the rotating member of the second bend adjusting mechanism, and the tail housing snapping together with the mounting member of the second bend adjusting mechanism.

7. The biplane adjustable curved sheath of claim 4, further comprising a stress-dissipating cuff and a nose member both disposed on the exterior of the sheath;

8. The biplane adjustable bending sheath according to claim 1, wherein the mounting member comprises a mounting column and a clamping ring portion, the clamping ring portion is arranged at one end of the mounting column and extends along the circumferential direction of the mounting column, and a clamping groove is formed at the other opposite end of the mounting column; the two opposite side parts of the mounting column body are respectively provided with a mounting groove extending along the length direction of the mounting column body, and the bottom wall of the mounting groove is provided with an avoiding opening;

9. The biplane adjustable bending sheath according to claim 8, wherein the mounting member further comprises a limiting protrusion, and the limiting protrusion is disposed on the bottom wall of the mounting groove, which is provided with the avoidance opening.

10. The bi-planar adjustable bend sheath of any one of claims 2-7, wherein the rotating member comprises a first rotating housing and a second rotating housing, the first rotating housing and the second rotating housing being plugged together; and/or