CN210408508U - Adjustable bending device for sheath tube - Google Patents

Abstract

The utility model provides a sheath pipe bending-adjustable device, which comprises a shell and a sheath pipe, wherein a winding part is arranged in the shell; the sheath tube is provided with a bendable distal end, and the proximal end of the sheath tube is arranged in the shell; adjustment mechanism, adjustment mechanism is including setting up the regulating part in the casing, a driving piece for driving the regulating part and removing, and two haulage wires, the different positions in the perisporium of sheath pipe are arranged in to two haulage wires slidable, the distal end of two haulage wires is connected in the flexible distal end, the near-end of one of them haulage wire is connected in the regulating part, the near-end of another haulage wire is walked around the wire winding portion and is connected in the regulating part, the driving piece can drive the regulating part and remove and drive the flexible distal end that two haulage wires slided and make the sheath pipe to crooked toward different directions. The utility model provides an adjustable curved device of sheath pipe can reduce the rotation number of times of sheath pipe, reduces the rotation range of sheath pipe, improves the work efficiency of adjustable curved device of sheath pipe, promotes the success rate of performing the operation.

Description

Adjustable bending device for sheath tube

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to an adjustable curved device of sheath pipe for transferring curved sheath pipe to and set up the conveyor of adjustable curved device of sheath pipe.

Background

The percutaneous interventional technique has the advantages of small wound, quick recovery, less complications and the like in the aspects of treating congenital heart diseases such as atrial septal defect, ventricular septal defect, patent ductus arteriosus, patent foramen ovale and the like and certain cardiovascular diseases and the like; therefore, they have been intensively researched and developed by hospitals, enterprises, universities, and the like, and have been rapidly developed. The sheath bending adjustable device is an indispensable use device in the percutaneous intervention technology, and the percutaneous intervention technology needs to deliver an implant such as an occluder, a stent or a medicament to a corresponding lesion part of a human body by the sheath bending adjustable device so as to play a role of the implant in treating diseases. The sheath of the sheath bending-adjustable device in the percutaneous intervention technology needs to be bent in an adjustable way, so that the implant can be conveniently released to a lesion part to better play the role of the implant. However, most of the existing sheath bending devices can only bend the distal end of the sheath in one direction, and when the bendable direction of the sheath is inconsistent with the position of a lesion, the sheath needs to be rotated by rotating the handle to drive the sheath to rotate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide an adjustable curved device of sheath pipe of easy operation, convenient to use to and set up the conveyor of the adjustable curved device of sheath pipe.

In order to solve the technical problem, the utility model provides a sheath tube bending-adjustable device, which comprises a shell and a sheath tube, wherein a winding part is arranged in the shell; the sheath tube is provided with a bendable distal end, and the proximal end of the sheath tube is arranged in the shell; adjustment mechanism, adjustment mechanism is including setting up the regulating part in the casing, a driving piece for driving the regulating part and removing, and two haulage wires, the different positions in the perisporium of sheath pipe are arranged in to two haulage wires slidable, the distal end of two haulage wires is connected in the flexible distal end, the near-end of one of them haulage wire is connected in the regulating part, the near-end of another haulage wire is walked around the wire winding portion and is connected in the regulating part, the driving piece can drive the regulating part and remove and drive the flexible distal end that two haulage wires slided and make the sheath pipe to crooked toward different directions.

The utility model provides a sheath pipe bending-adjustable device, which comprises a shell and a sheath pipe, wherein a winding part is arranged in the shell; the sheath tube is provided with a bendable distal end, and the proximal end of the sheath tube is arranged in the shell; adjustment mechanism, adjustment mechanism is including setting up the regulating part in the casing, a driving piece for driving the regulating part and removing, and two haulage wires, the different positions in the perisporium of sheath pipe are arranged in to two haulage wires slidable, the distal end of two haulage wires is connected in the flexible distal end, the near-end of one of them haulage wire is connected in the regulating part, the near-end of another haulage wire is walked around the wire winding portion and is connected in the regulating part, the driving piece can drive the regulating part and remove and drive the flexible distal end that two haulage wires slided and make the sheath pipe to crooked toward different directions. Because the sheath pipe of the sheath pipe adjustable bending device can be bent towards different directions, the rotating frequency of the sheath pipe can be reduced, the rotating amplitude of the sheath pipe is reduced, the sheath pipe adjustable bending device is convenient to use and simple to operate, the working efficiency of the sheath pipe adjustable bending device is improved, and the success rate of the operation is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a sheath bending adjusting device according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view taken along line II-II in fig. 1.

Fig. 3 is a perspective view of the first housing of fig. 2.

Fig. 4 is a schematic plan view of the first housing of fig. 3.

Fig. 5 is a perspective view of the second housing of fig. 2.

Fig. 6 is a schematic plan view of the second housing of fig. 5.

Fig. 7 is an exploded view of the distal cap of fig. 2.

Fig. 8 is a perspective view of the ferrule of the distal cap of fig. 7.

Fig. 9 is a schematic sectional view taken along line XI-XI in fig. 7.

Fig. 10 is a perspective view of the positioning tube of fig. 2.

Fig. 11 is a schematic cross-sectional view of the positioning tube of fig. 10.

Fig. 12 is a perspective view of the proximal cap of fig. 2.

Fig. 13 is a cross-sectional schematic view of the proximal cap of fig. 12.

FIG. 14 is a schematic perspective exploded view of the adjustment member and the drive member of the adjustment mechanism of FIG. 2.

Fig. 15 is a schematic view of another perspective of the adjustment member of fig. 14.

Fig. 16 is a schematic view of the sheath of fig. 2.

Fig. 17 is an enlarged view of the XVII portion in fig. 16.

Fig. 18 is a schematic view of the sheath of fig. 16 from another perspective.

Fig. 19 is a sectional view taken along the direction XIX-XIX in fig. 18.

Fig. 20 is an enlarged view of the XX portion in fig. 19.

Fig. 21 is a schematic structural view of the sheath bending apparatus of fig. 1 with the second housing removed.

Fig. 22 is a schematic structural view of a conveying device provided with a sheath tube bending adjustable device according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

Furthermore, the following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. Directional phrases used in this disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the attached drawing figures and, thus, are used in a better and clearer sense to describe and understand the present invention rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the invention.

Orientation definition: for clarity of description, the end of the procedure that is closer to the operator will be referred to as the "proximal end" and the end that is further from the operator will be referred to as the "distal end". This definition is for convenience of presentation only and should not be construed as limiting the present invention, and "axial" refers to the axial direction of the sheath or the axial direction of the housing.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural view of a sheath bending adjustable device according to an embodiment of the present invention; fig. 2 is a schematic sectional view taken along line II-II in fig. 1. The utility model provides a curved device 20 of sheath pipe adjustable, including casing 21, sheath pipe 23 to and be used for transferring curved sheath pipe 23's adjustment mechanism 25. Sheath 23 is provided with a bendable distal end and the proximal end of sheath 23 is placed within housing 21. Specifically, the sheath 23 includes a flexible distal end and a main body section 233, the flexible distal end includes a fixed section 232 at the distal end and an elastic section 235 connected between the fixed section 232 and the main body section 233, and the proximal end of the main body section 233 is disposed in the housing 21. The adjustment mechanism 25 includes an adjustment member 252 disposed within the housing 21, a drive member 254 for driving the adjustment member 252 in axial movement of the sheath 23, and two pull wires 256, the two pull wires 256 being slidably disposed at different positions within the circumferential wall of the sheath 23 in the axial direction of the sheath 23, a wire wrapping portion 2115 being disposed within the housing 21, preferably, the wire wrapping portion 2115 being adjacent to the proximal end of the adjustment member 252. The distal ends of two pull wires 256 are attached to the bendable distal end, with the proximal end of one pull wire 256 attached to the adjustment member 252 and the proximal end of the other pull wire 256 attached to the adjustment member 252 around the wire portion 2115. Specifically, the distal end of one of the pull wires 256 is fixed to the fixing section 232 of the sheath 23, and the proximal end of one of the pull wires 256 is directly connected to the adjusting member 252; the distal end of another pull wire 256 is attached to the attachment section 232 of the sheath 23, and the proximal end of the other pull wire 256 is attached to the adjustment member 252 after passing around the wire wrapping portion 2115. The driving member 254 can drive the adjusting member 252 to move and drive the two pulling wires 256 to slide, so that the bendable distal end of the sheath 23 can be bent in different directions, i.e. the elastic section 235 of the sheath 23 can be bent in different directions and the elastic section 235 can be elastically reset.

The sheath tube adjustable bending device 20 of the utility model comprises a sheath tube 23 and an adjusting mechanism 25, wherein the sheath tube 23 is provided with a bendable far end and the near end of the sheath tube 23 is arranged in the shell 21; the adjustment mechanism 25 includes an adjustment member 252, a driving member 254, and two pulling wires 256 slidably disposed at different positions within the circumferential wall of the sheath 23, distal ends of the two pulling wires 256 being connected to the bendable distal ends, respectively, wherein a proximal end of one of the pulling wires 256 is directly connected to the adjustment member 252, and the other pulling wire 256 is connected to the adjustment member 252 after passing around a winding portion 2115. When the driving member 254 drives the adjustment member 252 to move distally or proximally along the axial direction of the main body segment 233, the two pulling wires 256 can be driven to slide so that the bendable distal end of the sheath 23 can be bent in different directions. Since the sheath 23 of the sheath adjustable bending device 20 can be bent in different directions, the number of times of rotation of the sheath 23 can be reduced, and the rotation range of the sheath 23 can be reduced; in addition, the sheath adjustable bending device 20 is convenient to use and simple to operate, the working efficiency of the sheath adjustable bending device 20 is improved, and the success rate of the operation is improved.

Referring to fig. 3 to 13, the housing 21 includes a first shell 211, a second shell 213, a distal end cap 215, a positioning tube 217 disposed at the proximal end of the housing 21, and a proximal end cap 218 connected to the proximal end of the positioning tube 217. The first housing 211 is coupled to the second housing 213 to form a tube-like structure with two open ends, the distal cap 215 is disposed at the distal end of the tube-like structure, the positioning tube 217 is disposed at the proximal end of the tube-like structure, and the main body 233 of the sheath 23 is fixedly coupled to the positioning tube 217 through the distal cap 215 and the tube-like structure.

As shown in fig. 3 and 4, a semi-circular arc-shaped retaining strip 2111 is axially protruded from the distal end surface of the first housing 211, and the retaining strip 2111 and the distal end surface of the first housing 211 enclose a semi-circular retaining groove 2112. The inner wall of the first housing 211 is provided with a plurality of first supporting plates 2113, two first positioning posts 2114, two winding portions 2115, two first positioning plates 2116, and a first half-round tubular extension tube 2117 in sequence from the distal end to the proximal end. A plurality of first supporting plates 2113 are arranged at intervals in the axial direction of the first housing 211, the first supporting plates 2113 supporting the driving member 254; two first positioning posts 2114 are arranged at intervals along the radial direction of the first housing 211, and a first positioning groove 2110 is arranged at the end of each first positioning post 2114; the two winding portions 2115 are winding posts extending in the radial direction of the first housing 211, and the two winding posts are arranged at intervals in the radial direction of the first housing 211; the two first positioning sheets 2116 are arranged at intervals along the axial direction of the first housing 211, and the middle parts of the two first positioning sheets 2116 are provided with corresponding positioning holes 2118 along the axial direction of the first housing 211; a first extension pipe 2117 is obliquely passed through the outer wall of the first housing 211, and two first aligning tabs 2116 are used to mount the aligning pipe 217 together with the first extension pipe 2117. A plurality of clamping pieces 2119 are respectively arranged on two opposite side walls of the first shell 211 in a protruding manner.

As shown in fig. 5 and 6, the second housing 213 has a structure similar to that of the first housing 211, a semicircular limiting strip 2131 is axially protruded from a distal end surface of the second housing 213, and the limiting strip 2131 and the distal end surface of the second housing 213 enclose a semicircular limiting groove 2132. The inner wall of the second housing 213 is provided with a plurality of second supporting pieces 2133, two second positioning posts 2134, two second positioning pieces 2136, and a second semi-circular tube-shaped extending tube 2137 sequentially from the distal end to the proximal end. A plurality of second supporting pieces 2133 are arranged at intervals along the axial direction of the second housing 213, and the second supporting pieces 2133 are used for supporting the driving member 254; two second positioning columns 2134 are arranged at intervals along the radial direction of the second housing 213, and a second positioning groove 2130 is arranged at the tail end of each second positioning column 2134; the two second positioning pieces 2136 are arranged at intervals along the axial direction of the second shell 213, and the middle parts of the two second positioning pieces 2136 are provided with corresponding positioning holes 2138 along the axial direction of the second shell 213; a second extension tube 2137 is obliquely inserted through the outer wall of the second housing 213, and two second positioning pieces 2136 are used together with the second extension tube 2137 to mount the positioning tube 217. A plurality of elastic clamping hooks 2139 are respectively and convexly arranged on two opposite side walls of the second housing 213, and the clamping hooks 2139 correspond to the clamping sheets 2119 of the first housing 211 one by one.

As shown in fig. 7-9, the distal cap 215 includes a cap body 2151 and a ferrule 2157 connected to a distal end of the cap body 2151, the distal cap 215 having a through hole 2152 axially formed therein, the through hole 2152 passing through the cap body 2151 and a middle portion of the ferrule 2157. The two opposite sides of the through hole 2152 in the cap body 2151 are respectively provided with a fixing hole 2153, the fixing holes 2153 extend along the axial direction of the through hole 2152, and the fixing holes 2153 penetrate through the proximal end face of the cap body 2151. The two fixing holes 2153 are respectively fixed with the two guide posts 2154, the two guide posts 2154 are spaced apart and parallel, and the proximal ends of the guide posts 2154 extend out of the proximal end surface of the distal end cap 215.

In this embodiment, the sleeve head 2157 is fastened to the distal end of the cap body 2151, specifically, the distal end surface of the cap body 2151 is provided with a fastening ring 2155 protruding around the through hole 2152, the proximal end surface of the sleeve head 2157 is provided with fastening grooves 2158 corresponding to the fastening ring 2155 around the through hole 2152, and the fastening ring 2155 can be fastened in the fastening grooves 2158. The sleeve 2157 may be made of a soft material such as rubber or silica gel, and the proximal end of the sheath 23 is connected between the first housing 211 and the second housing 213 after passing through the sleeve 2157 and the through hole 2152 of the cap 2151, and since the sleeve 2157 is made of a soft material, the sleeve 2157 can reduce friction and wear between the sheath 23 and the distal end of the distal end cap 215.

As shown in fig. 10 and 11, the positioning tube 217 is a Y-shaped tube, the positioning tube 217 includes a main tube 2171 and a side tube 2173 obliquely projected from the proximal end of the main tube 2171, and the side tube 2173 communicates with the main tube 2171. The outer peripheral surface of the distal end of the main tube 2171 is protruded with a ring-shaped protrusion 2175, the axial extension length of the protrusion 2175 is equal to the distance between the two first positioning pieces 2116 of the first housing 211, and the protrusion 2175 can be simultaneously clamped between the positioning holes 2118 of the two first positioning pieces 2116 and the positioning holes 2138 of the two second positioning pieces 2136 to fix the positioning tube 217 to the housing 21. The proximal end of the main tube 2171 is internally threaded 2176 and the internal threads 2176 are used to attach to the proximal cap 218.

As shown in fig. 12 and 13, the proximal cap 218 has a cylindrical shape, and a through hole 2182 is axially formed in the middle of the proximal cap 218. The outer wall of the distal end of proximal cap 218 is provided with external threads 2184 that correspond to internal threads 2176 of positioning tube 217. An annular stop piece 2185 is protruded from the outer wall of the proximal end of the proximal cap 218, and the stop piece 2185 can increase the tightness of the threaded fastening between the proximal cap 218 and the positioning tube 217.

As shown in fig. 14 and 15, the adjusting member 252 is connected to the driving member 254 by a screw connection, and the rotation of the driving member 254 can drive the adjusting member 252 to move along the axial direction of the sheath 23. Specifically, the adjusting element 252 is of a cylinder-like structure, a through hole 2520 is axially formed in the middle of the adjusting element 252, and the adjusting element 252 is slidably sleeved on the sheath 23 through the through hole 2520. The adjusting element 252 has two fixing holes 2522 formed at two opposite sides of the through hole 2520, and the two fixing holes 2522 are fixed to the proximal ends of the two pulling wires 256 in a one-to-one fit manner. The adjusting element 252 has two sliding guide holes 2524 on the other two opposite sides of the through hole 2520, and the two sliding guide holes 2524 correspond to the two sliding guide posts 2154, that is, the two sliding guide posts 2154 can be slidably inserted into the two sliding guide holes 2524. The outer circumferential surface of the adjusting member 252 is provided with external threads 2526.

In this embodiment, the axial lines of the two fixing holes 2522 are symmetrical along the axial line of the through hole 2520, and the axial lines of the two fixing holes 2522 are coplanar with the axial line of the through hole 2520; the axial lines of the two sliding guide holes 2524 are symmetrical along the axial line of the through hole 2520, and the axial lines of the two sliding guide holes 2524 are coplanar with the axial line of the through hole 2520; the plane formed by the axes of the two fixing holes 2522 is perpendicular to the plane formed by the axes of the two slide guide holes 2524.

The driver 254 includes a rotary cylinder 2541 and an operation portion 2543 provided to the rotary cylinder 2541. Specifically, one end of the driving member 254 is provided with a rotary cylinder 2541, and the operation portion 2543 is provided on the distal outer wall of the rotary cylinder 2541. An internal thread 2545 corresponding to the external thread 2526 of the adjuster 252 is provided on the inner circumferential surface of the rotary cylinder 2541, the adjuster 252 can be housed in the rotary cylinder 2541, and the outer circumferential surface of the adjuster 252 is screwed to the inner circumferential surface of the rotary cylinder 254, i.e., the external thread 2526 is screwed to the internal thread 2545. The operation part 2543 is an annular sleeve which is fixedly sleeved on the rotating cylinder 2541, and the rotating operation part 2543 can drive the rotating cylinder 2541 to rotate together. The outer peripheral surface of the operating portion 2543 is provided with cleats 2546, and these cleats 2546 facilitate rotation of the driver 254.

In other embodiments, the rotary cylinder 2541 and the operation portion 2543 may be formed by integral molding.

In other embodiments, the rotary cylinder 2541 and the operation portion 2543 can be fixed by screwing, gluing, welding, etc.

In other embodiments, the outer circumferential surface of the operation portion 2543 may be provided with anti-slip threads or a rough treatment.

As shown in fig. 16 and 17, two pull wires 256 are positioned at diametrically opposite ends of the sheath 23, distal ends of the pull wires 256 are fixed to the fixing segments 232, and the pull wires 256 are axially slidable in the circumferential wall of the sheath 23. The elastic section 235 is made of elastic material, and the elastic section 235 can elastically restore to the original shape after being bent by 180 degrees; an annular developing ring 2321 is provided in the fixing section 232 of the sheath 23, and distal ends of the two pull wires 256 are respectively fixed to a proximal end of the developing ring 2321. Preferably, two opposite pulling tubes 237 are arranged in the peripheral wall of the sheath 23, each pulling tube 237 extends along the axial direction of the sheath 23, and the two pulling tubes 237 are positioned at two ends of the sheath 23 in the radial direction; the distal end of each pulling tube 237 is connected to the fixing section 232 of the sheath 23, specifically, the pulling tubes 237 are welded to the proximal peripheral wall of the developing ring 2321 by welding or bonding, the proximal end of each pulling tube 237 extends into the housing 21 along the peripheral wall of the sheath 23, and the proximal end port of each pulling tube 237 bends away from the axial center and extends into the housing 21. The two pulling wires 256 are respectively slidably disposed in the two pulling tubes 23, a distal end of each pulling wire 256 is welded to the developing ring 2321 of the fixing section 232, a proximal end of each pulling wire 256 penetrates through a proximal port of the pulling tube 23 and is connected to the adjusting member 252, and the pulling wires 256 can slide along the corresponding pulling tube 23.

In this embodiment, the two pulling pipes 237 are located at two ends of the diameter of the pulling pipe 23, and the axial lines of the two pulling pipes 237 and the axial line of the sheath pipe 23 are located on the same plane.

As shown in fig. 18 to 20, two bending assisting grooves 2351 are concavely formed on the outer peripheral surface of the elastic section 235 of the sheath 23 corresponding to the two pull wires 256. Specifically, two bending-assistant grooves 2351 correspond to the two traction tubes 237 one by one, and each bending-assistant groove 2351 extends to the distal end of the main body segment 233 along the axial direction of the sheath 23. The sheath 23 concentrates the stress of the corresponding bending-assist groove 2351 under the pulling force of the pulling wire 256, so that the elastic section 235 is facilitated to bend along the direction of the bending-assist groove 2351 under the smaller acting force of the corresponding pulling wire 256, and the accuracy of the bending direction of the elastic section 235, the easiness of bending and the simplicity of operation are improved.

Referring to fig. 1 to 21, when assembling the sheath bending device 20, the adjusting element 252 is first screwed into the rotating cylinder 2541 of the driving element 254, and a backing ring 255 is sleeved into the rotating cylinder 2541 from the proximal end until the backing ring 255 abuts against between the proximal end surface of the operating portion 2543 and the distal end surface of the housing 21, and the backing ring 255 facilitates the rotation of the driving element 254; slidably passing the proximal end of the main body segment 233 of the sheath 23 from the distal end of the rotating cylinder 2541 through the through hole 2520 of the adjusting member 252, and clamping and communicating the proximal end of the main body segment 233 to the distal end port of the positioning tube 217; the rotating cylinder 2541 of the driving member 254 is placed on the first supporting plate 2113 of the first housing 211, the protrusion 2175 of the positioning tube 217 is clamped between the two first positioning plates 2116, and the positioning tubes 217 at the two ends of the protrusion 2175 are clamped into the positioning holes 2118 of the two first positioning plates 2116. At this time, the operation portion 2543 of the driving member 254 is exposed out of the distal end of the first housing 211, a portion of the backing ring 255 is engaged with the retaining groove 2112 of the first housing 211, the sheath 23 passes through the gap between the two first positioning posts 2114 and the gap between the two winding portions 2115, and the side tube 2173 of the positioning tube 217 is inserted into the first extension tube 2117.

The proximal end of one of the pull wires 256 is secured to the distal end of one of the attachment bores 2522 of the adjustment member 252, and the proximal end of the other pull wire 256 is secured to the distal end of the other attachment bore 2522 by passing around the coil portion 2115. At this time, the two pulling wires 256 are located at two opposite sides of the axial line of the sheath 23, and the two pulling wires 256 are in a tensioned state, the elastic section 235 of the sheath 23 is in a straightened state, and more preferably, two fixing holes 2522 are distributed at the proximal end and the distal end of the adjusting member 252, wherein the proximal end of one pulling wire 256 is fixed to the fixing hole 2522 at the distal end of the adjusting member 252, and the proximal end of the other pulling wire 256 is fixed to the fixing hole 2522 at the proximal end of the adjusting member 252 after bypassing the winding portion 2115.

The ferrule 2157 is sleeved on the distal end of the cap 2151, and the proximal ends of the two guiding and sliding posts 2154 of the distal end cap 215 slidably pass through the two guiding and sliding holes 2524 of the adjusting member 252 from the distal end of the rotating cylinder 2541 until the proximal ends of the guiding and sliding posts 2154 are respectively clamped in the first positioning grooves 2110 of the two first positioning posts 2114. At this time, the distal end of the sheath 23 is exposed through the through holes 2152 of the cap body 2151 and the cap 2157, respectively; the second housing 213 is covered on the first housing 211, so that the other part of the backing ring 255 is clamped in the limiting groove 2132 of the second housing 213, and the clamping hook 2139 of the second housing 213 is clamped in the corresponding clamping piece 2119 of the first housing 211, so that the adjusting mechanism 25 is installed between the first housing 211 and the second housing 213. At this time, the second support plates 2133 of the second housing 213 correspond to the first support plates 2113 of the first housing 211 one by one, the opposite first support plates 2113 and the second support plates 2132 enclose a circular hole for installing the rotating cylinder 2541, and the driving element 254 can rotate in the circular hole; the second positioning posts 2134 of the second housing 213 correspond to the first positioning posts 2114 of the first housing 211 one by one, and the first positioning groove 2110 of the corresponding first positioning post 2114 and the second positioning groove 2130 of the second positioning post 2134 enclose a space for clamping the proximal end of the sheath 23; the ends of the two winding portions 2115 contact the inner wall of the second housing 213, preventing the drawing wire 256 from coming off the winding portions 2115; the second positioning pieces 2136 of the second shell 213 correspond to the first positioning pieces 2116 of the first shell 211 one by one, and the positioning holes 2118 of the corresponding first positioning pieces 2116 and the positioning holes 2138 of the second positioning pieces 2136 enclose a space for installing the main tube 2171 of the positioning tube 217. The external threads 2184 of the proximal cap 218 are then threadably engaged with the internal threads 2176 of the proximal end of the main tube 2171, and a sealing ring 219 is disposed between the proximal cap 218 and the main tube 2171, the sealing ring 219 being used to prevent blood or other liquids within the sheath 23 from escaping from the proximal end of the proximal cap 21 during the interventional procedure.

When the sheath bending apparatus 20 is used, the driving member 254 is rotated by operating the operating portion 2543, so as to drive the adjusting member 252 to rotate and move axially along the guide post 2154 in the proximal or distal direction. In the initial state of the adjusting mechanism 25, when the adjusting member 252 is rotated and moved axially, the pulling wire 256 directly fixed to the adjusting member 252 is driven to slide proximally, so that the elastic segment 235 is bent toward one side of the pulled pulling wire 256, and during the bending process of the elastic segment 235, the pulling wire 256 connected to the adjusting member 252 after passing around the winding portion 2115 is pulled to slide distally by the deformation of the elastic segment 235, so that the elastic segment 235 is bent; in the initial state of the adjusting mechanism 25, when the adjusting element 252 rotates and moves axially in a distal direction, the pull wire 256 connected to the adjusting element 252 after passing through the winding portion 2115 is driven by the adjusting element 252 to slide in a proximal direction, so that the elastic segment 235 bends toward one side of the pulled pull wire 256, and the elastic segment 235 drives the pull wire 256 directly fixed to the adjusting element 252 to slide in a distal direction during the bending process, so that the elastic segment 235 completes the bending.

The initial state of the adjustment mechanism 25 is when the flexible section 235 of the sheath 23 is in a straightened state.

Because the adjusting element 252 is connected with the driving element 254 by the screw thread, when the elastic section 235 of the sheath 23 needs to be bent, the adjusting element 252 can be driven to axially reciprocate along the sheath 23 by only operating the operation part 2543 to rotate the driving element 254, so as to drive the elastic section 235 of the sheath 23 to be bent to a proper position; when the rotary cylinder 2541 is not rotated, the adjustment member 252 can be positioned. Therefore, the utility model discloses an elastic segment 235 flexible to arbitrary angle of sheath 23 of the curved device 20 of sheath pipe adjustable to can fix a position on arbitrary angle, the curved device 20 easy operation of sheath pipe adjustable, convenient to use can improve work efficiency, and promote the success rate of operation.

In other embodiments, the rotating cylinder 2541 of the driving member 254 of the adjusting mechanism 25 can be replaced by a screw rod, and the adjusting member 252 is axially provided with a threaded through hole corresponding to the screw rod, the screw rod is screwed in the threaded through hole, and the rotating screw rod can drive the adjusting member 252 to axially reciprocate. Specifically, the screw rod is disposed in the middle of the radial cross section of the operating portion 2543 and extends in the axial direction, a through hole is axially formed in the middle of the screw rod, and the threaded through hole is formed in the middle of the radial cross section of the adjusting member 252 and axially penetrates through the proximal end surface and the distal end surface of the adjusting member 252; after the screw rod is screwed in the threaded through hole, the proximal end of the sheath 23 can slidably pass through the through hole and the threaded through hole of the screw rod. The guide posts 2154 may also slidably pass through the through holes of the screw.

As shown in fig. 22, the present invention further provides a conveying device, which includes a sheath bending device 20, a loader 40 connected to the proximal end of the sheath bending device 20, and a pushing device 60 disposed at the proximal end of the loader 40. The sheath bending adjustable device 20 comprises a shell 21, a sheath 23 and an adjusting mechanism 25 for bending the sheath 23. The sheath 23 comprises a fixed section 232 at the distal end, a main section 233 at the proximal end, and an elastic section 235 connected between the fixed section 232 and the main section 233, wherein the proximal end of the main section 233 is disposed in the housing 21. The adjusting mechanism 25 includes an adjusting member 252, a driving member 254 for driving the adjusting member 252 to move in the axial direction of the sheath 23, and two pulling wires 256, the two pulling wires 256 are slidably disposed in the circumferential wall of the sheath 23 in the axial direction of the sheath 23, and the two pulling wires 256 are disposed at both ends of the sheath 23 in the radial direction. A wire winding portion 2115 is provided in the housing 21 adjacent to the proximal end of the adjustment member 252, wherein the distal end of a pull wire 256 is secured to the fixed section 232 of the sheath 23, and wherein the proximal end of a pull wire 256 is directly fixedly connected to the adjustment member 252; the distal end of another pull wire 256 is fixed to the fixed section 232 of the sheath 23, the proximal end of another pull wire 256 is connected to the adjustment member 252 after passing around the winding portion 2101, and the movement of the adjustment member 252 causes the flexible section 235 to bend or reposition via the two pull wires 256. The loading device 40 comprises a loading tube 42, and the distal end of the loading tube 42 passes through the through hole of the proximal end cap 218 and the positioning tube 217 and then is inserted into the sheath 23. The pushing device 60 is used for pushing an interventional medical device, and the pushing device 60 includes a pushing assembly 62 and a pushing handle 63 disposed at a proximal end of the pushing assembly 62.

The above is an implementation manner of the embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principles of the embodiments of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (14)

1. A sheath tube adjustable bending device is characterized by comprising

The winding device comprises a shell, a winding part and a winding part, wherein the winding part is arranged in the shell;

a sheath, the sheath having a flexible distal end and a proximal end disposed within the housing;

adjustment mechanism, adjustment mechanism including set up in regulating part in the casing, be used for the drive the driving piece that the regulating part removed to and two pull wires, two the pull wire slidable is arranged in different positions in the perisporium of sheath pipe, two the distal end of pull wire connect in the flexible distal end, one of them the near-end of pull wire connect in the regulating part, another the near-end of pull wire is walked around wire winding portion connect in the regulating part, the driving piece can drive the regulating part removes and drives two the pull wire slides and makes the flexible distal end is crooked toward not equidirectional.

2. The sheath adjustable bending device of claim 1, wherein the sheath comprises the bendable distal end and a main body segment, the bendable distal end comprises a fixed segment and an elastic segment, the elastic segment connects the fixed segment and the main body segment, two of the pulling wires are located at diametrically opposite positions of the sheath, and the distal ends of the two pulling wires are fixed to the fixed segment.

3. The sheath adjustable bending device of claim 1, wherein the driving member is rotatably partially sleeved in the housing, the adjusting member is screwed to the driving member, and the driving member is rotated to drive the adjusting member to axially reciprocate along the sheath.

4. The sheath bending adjusting device according to claim 3, wherein a rotating cylinder is provided at one end of the driving member, the adjusting member is accommodated in the rotating cylinder, and an inner peripheral surface of the rotating cylinder is threadedly coupled to an outer peripheral surface of the adjusting member.

5. The sheath bending adjusting device of claim 3, wherein the driving member comprises a screw rod extending along an axial direction, the adjusting member is provided with a threaded through hole corresponding to the screw rod, a through hole is axially formed in a middle portion of the screw rod, and the sheath is slidably inserted into the through hole.

6. The sheath adjustable bending device of claim 3, wherein a through hole is axially formed in the middle of the adjusting member, and the adjusting member is slidably sleeved on the sheath through the through hole.

7. The sheath adjustable bending device of claim 2, wherein two pulling tubes are arranged in the sheath peripheral wall, the distal ends of the two pulling tubes are connected to the fixing section, the proximal ends of the two pulling tubes extend into the housing, the proximal end ports of the two pulling tubes are bent away from the axial direction and extend into the housing, and the pulling wire can slide along the pulling tubes.

8. The sheath bending adjustable device as claimed in claim 7, wherein the adjusting member is provided with two opposite fixing holes, and the proximal ends of the two pulling wires are fixed to the two fixing holes in a one-to-one fit manner.

9. The sheath adjustable bending device according to claim 1, wherein a guide sliding column is disposed in the housing along a moving direction of the adjusting member, the adjusting member is provided with a guide sliding hole corresponding to the guide sliding column, and the guide sliding column is slidably inserted into the guide sliding hole.

10. The sheath adjustable bending device according to claim 2, wherein a developing ring is provided in the fixed section.

11. The sheath bending adjusting device according to claim 4, wherein the driving member further includes an operating portion provided to the rotating cylinder, the operating portion is exposed from the housing, and the rotating cylinder is rotated by rotating the operating portion.

12. The sheath bending-adjustable device of claim 2, wherein the outer peripheral surface of the elastic section is concavely provided with a bending-assisting groove corresponding to the traction wire.

13. The sheath adjustable bending device of claim 12, wherein the bending-assistant groove extends along the axial direction of the sheath, and the proximal end of the bending-assistant groove extends to the distal end of the main body section of the sheath.

14. The sheath bending-adjustable device of claim 2, wherein a positioning tube is disposed at the proximal end of the housing, and a proximal cap is connected to the positioning tube, the proximal end of the main body segment is fixed to the distal end of the positioning tube, the proximal cap is connected to the distal end of the positioning tube, and an annular stop piece is protruded from the proximal end of the outer peripheral surface of the proximal cap.

Images