CN115715838A - Medical instrument capable of adjusting bending - Google Patents

Abstract

The utility model provides a medical apparatus that can bend, including the sheath pipe, actuating mechanism and two sets of accent curved subassembly, it includes that at least one transfers the curved silk to transfer curved subassembly, the distal end that belongs to same accent curved subassembly's accent curved silk is located the same radial face of sheath pipe, the distal end that the transfer curved silk of two sets of accent curved subassemblies is located the different circumferential direction position of sheath pipe, and link to each other with the sheath pipe distal end, the distal end that transfers curved silk in the two sets of accent curved subassemblies is located the different radial planes of sheath pipe, the proximal end that the transfer curved silk of two sets of accent curved subassemblies all extends the sheath pipe, and link to each other with actuating mechanism, under actuating mechanism's effect, two sets of accent curved subassemblies can drive the sheath pipe and bend in two different accent curved planes. The medical instrument capable of adjusting bending can realize the adjustment of the three-dimensional space of the distal end of the sheath tube, and is suitable for being used in interventional operations.

Description

Medical instrument capable of adjusting bending

Technical Field

The invention relates to the field of medical instruments, in particular to a medical instrument capable of being bent.

Background

The interventional operation is an operation of diagnosis and treatment through a blood vessel by using corresponding interventional equipment, such as a guide wire, a catheter and the like under the guidance of medical imaging equipment. The interventional operation treatment has the advantages of low human body invasion, small wound, less complications, less risk and the like. In an interventional operation, in order to adapt to anatomical forms of different purposes and specific diseased regions, the distal end (i.e., the end far away from an operator) of a sheath tube is usually pre-molded into different bending shapes, and pre-bent sheath tubes of different types correspond to different pre-bent angles and bending forms, so that medical staff can select the pre-bent angles and the bending forms conveniently. When a sheath is selected by a medical worker, the medical worker firstly observes the position of a lesion under the assistance of medical images such as DSA (Digital Subtraction Angiography) and ultrasound and then selects a pre-shaped sheath with similar bending form according to judgment. Because of the observed error and the individual difference, the sheath tube meeting the requirements is difficult to select at one time, when the problem occurs, the medical staff usually needs to withdraw the sheath tube, and then reselect sheath tubes of other models to insert, the existing operation mode not only needs to prepare a large number of sheath tubes of different models in the hospital to meet different bending requirements, but also is more important, in the process of repeatedly selecting the sheath tube, the injury of the blood vessel of the patient can be caused, the risk of the operation is increased, the time of the interventional operation is prolonged, the time of the radiation contact of the patient and the medical staff is increased, and the potential safety hazard is realized. Based on the situation, in recent years, the sheath tube with the angle adjustable at the far end is developed, and the curvature of the far end of the sheath tube is adjusted by matching the handle outside the body with the bending adjusting wire fixed in the sheath tube, so that the requirement of interventional operation is met.

The distal end of the existing adjustable bent sheath tube can only be bent in the same plane, and the sheath tube cannot be applied to the part needing implanting the instrument, such as the left atrial appendage occlusion through a catheter, when the part has a more complex physiological anatomical structure. As shown in fig. 1, in the transcatheter left atrial appendage occlusion, a sheath passes through the inferior vena cava along a guide wire to the right atrium, then passes through the puncture point of the interatrial septum to the left atrium, and finally reaches the left atrial appendage. In actual operation, because the proficiency degree of doctor's operation is different, can not guarantee the accuracy of interatrial septum puncture point position, in case the puncture point selection is inaccurate, the contained angle between inferior vena cava interatrial septum puncture point and the contained angle between left atrial appendage and interatrial septum puncture point are not in the coplanar, the sheath pipe passes behind the interatrial septum and is in the different planes with left atrial appendage, although the distal end of current adjustable curved sheath pipe can adjust, but angle regulation in a plane can only be carried out, can not carry out three-dimensional space's regulation, can not adjust the sheath pipe to the coplanar with left atrial appendage, be difficult to send the implantation instrument into the target site. Therefore, the existing bendable sheath can only be bent in the same plane, and when the sheath is in a relatively complex physiological anatomical structure, the sheath is difficult to reach a target part, so that the operation is influenced.

Disclosure of Invention

The invention overcomes the defects that the bending of the adjustable bending sheath tube in the prior art can only be adjusted on the same plane, and the operation is influenced because the adjustable bending sheath tube is difficult to reach a target part when having a more complex physiological anatomical structure, and provides an adjustable bending medical instrument.

The invention adopts the technical scheme that the purpose of the invention is realized by: the utility model provides a medical apparatus that can bend, including the sheath pipe, actuating mechanism and two sets of subassemblies that transfer to bend, transfer to bend the subassembly and include that at least one transfers the curved silk, the distal end that belongs to same accent curved subassembly transfers the curved silk is located the same radial plane of sheath pipe, the distal end that transfers curved silk of two sets of subassemblies that transfer to bend is located the different circumference position of sheath pipe, and link to each other with the sheath pipe distal end, the distal end that transfers curved silk in two sets of subassemblies that transfer to bend is located the different radial planes of sheath pipe, the proximal end that transfers curved silk of two sets of subassemblies that transfer all extends the sheath pipe, and link to each other with actuating mechanism, under actuating mechanism's effect, two sets of subassemblies that transfer to bend can drive the bending of sheath pipe in two different accent curved planes.

The invention has the beneficial effects that: the bending adjusting wires of different bending adjusting components are connected to different radial planes of the sheath tube, the bending adjusting wires of different bending adjusting components are arranged at the circumferential position of the sheath tube, different sections of the sheath tube can be bent along different planes through the driving mechanism, and the spatial position of the sheath tube can be adjusted in a three-dimensional space, so that the medical bending adjusting instrument can accurately reach a target part even facing a complex physiological anatomical structure, and meets the requirement of an operation.

The invention is further described with reference to the following figures and embodiments.

Drawings

Fig. 1 is a schematic illustration of insertion of a sheath for left atrial appendage occlusion.

Fig. 2 is a perspective view of the adjustable bending medical instrument of the present invention.

FIG. 3 is a schematic cross-sectional view of a sheath according to the present invention.

Fig. 4 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 3.

Fig. 5A is an exploded view of the adjustable bend medical device of the present invention.

Fig. 5B is an enlarged view of B in fig. 5A.

FIG. 6 is a schematic view of the assembly of the knob, the driving mechanism and the knob seat of the present invention.

FIG. 7 is an installation diagram of the bend adjusting wire and the driving mechanism of the present invention.

Fig. 8 is a first schematic view of the assembly of the knob and the driving mechanism of the present invention.

Fig. 9 is a schematic structural view of the transmission rod of the present invention.

Fig. 10 is a second assembly view of the knob and the driving mechanism of the present invention.

Fig. 11 is a schematic structural view of the wrapping post of the present invention.

Fig. 12 is a schematic view of the assembly of two transmission rods and two winding posts according to the present invention.

Fig. 13 is a top view of fig. 12.

In the drawings, 1 is an adjustable bending device, 10 is a sheath, 11 is an adjustable bending section, 12 is a bending wire channel, 20 is a driving mechanism, 21 is a driving mechanism unit, 211 is a mounting seat, 212 is a transmission part, 2121 is a transmission rod, 2122 is a worm, 2123 is a gear, 2124 is an idler wheel, 213 is a winding part, 2131 is a winding post, 2132 is a worm wheel, 2133 is a winding groove, 2134 is a bending wire fixing component, 2135 is a bending wire fixing component, 2136 is a fixing component clamping groove, 30 is a bending component, 31 is a bending wire, 40 is a handle, 41 is a shell, 411 is a shell, 412 is a distal end cover, 413 is a knob seat, 4131 is an opening, 4132 is a retainer ring, 414 is a proximal end cover, 42 is a knob, and 43 is a luer connector.

Detailed Description

Referring to fig. 2, the adjustable bending medical apparatus 1 of the present embodiment includes a sheath 10 and a handle 40.

As shown in fig. 3, the sheath 10 is a medical catheter having a wall thickness, which is formed with a delivery lumen for delivering an implant. The sheath 10 of the present embodiment is a straight tube in a natural state. The sheath 10 includes two adjustable bending sections 11 located at the distal end of the sheath and spaced from each other, the two adjustable bending sections 11 are spaced from each other along the length direction of the sheath 10, the adjustable bending sections 11 have a certain extension length along the length direction of the sheath 10, the adjustable bending sections 11 have smaller bending strength than other sections of the sheath 10, and when the adjustable bending sections 11 are subjected to a pulling force, the adjustable bending sections can be adjusted to be bent. Of course, in other embodiments, the adjustable bending section 11 with smaller bending strength may not be provided.

As shown in fig. 4, a bending wire adjusting channel 12 is provided in the tube wall of the sheath tube 10, and a wire outlet communicated with the bending wire adjusting channel 12 is provided on the tube wall of the sheath tube 10, for the bending wire 31 to pass through the inner wall of the sheath tube 10. The bending adjusting wire channels 12 are respectively arranged corresponding to the bending adjusting wires 31 of the two bending adjusting assemblies 30 one by one, that is, the bending adjusting wires 31 of the two bending adjusting assemblies 30 penetrate through the bending adjusting wire channels 12 one by one. A PTFE (polytetrafluoroethylene) lining tube is arranged in the bend adjusting wire channel 12, and has good self-lubricating performance, so that the sliding resistance of the bend adjusting wire 31 during bend adjustment can be reduced.

As shown in fig. 3 and 4, the medical device 1 for adjustable bending in this embodiment further includes two bending adjusting assemblies 30, the two bending adjusting assemblies 30 are arranged at intervals along the length direction of the sheath 10, and the two bending adjusting assemblies 30 have substantially the same structure. The structure of one of the bending adjusting assemblies 30 is specifically described in detail.

The bending adjustment assembly 30 of the present embodiment includes two bending adjustment wires 31 and an anchoring ring 33, the anchoring ring 33 can be disposed on the far side of the distal end of the adjustable bending section 11, or can be disposed in the adjustable bending section 11, as long as the anchoring ring 33 is disposed on the far side of the proximal end of the adjustable bending section 11. In this embodiment, an anchoring ring 33 is provided distal to the distal end of the adjustable bend section 11. The anchoring ring 33 is fixedly mounted within the wall of the sheath 10, and the central axis of the anchoring ring 33 may be parallel or coincident with the central axis of the sheath 10. In this embodiment, the central axis of the anchoring ring 33 coincides with the central axis of the sheath 10.

The distal ends of the two bending wires 31 of the bending adjusting component 30 are fixedly connected to the anchoring ring 33, so that the distal ends of the anchoring ring 33 can be regarded as the distal ends of the two bending wires 31 connected thereto, i.e. the distal ends of the two bending wires 31 belonging to the same bending adjusting component 30 can be regarded as being located in the same radial plane of the sheath tube 10.

The bending adjusting wires 31 of the two bending adjusting components 30 are arranged corresponding to the bending adjusting wire channels 12 one by one. The proximal ends of the bending wires 31 of the two bending adjusting components 30 penetrate out of the tube wall of the sheath tube 10 through the bending wire passage 12 and are connected with the driving mechanism. The bending wires 31 of the two bending adjusting components 30 are positioned in the axial plane of the anchoring ring 33, so that the bending adjusting wires 31 in the sheath 10 are positioned in the axial plane of the sheath 10. When the driving mechanism exerts a traction action on the bending adjustment assembly 30, the sheath 10 can be bent in the plane.

In this embodiment, the bending adjusting assemblies 30 include two sets of bending adjusting assemblies 30, distal ends of the bending adjusting wires 31 in the two sets of bending adjusting assemblies 30 are located in different radial planes of the sheath tube 10, that is, the anchoring rings 33 of the two sets of bending adjusting assemblies 30 are located in different radial planes of the sheath tube 10, and when the driving mechanism applies a traction action to the two sets of bending adjusting assemblies 30, different sections of the sheath tube 10 can be bent. The distal end of the curved silk 31 of accent of two sets of accent curved subassembly 30 is located the different circumferential position of sheath pipe 10, two sets of accent curved subassembly 30 arbitrary one of transfer curved silk 31 is along the circumference of sheath pipe 10 and is all not coincided promptly, and then make, actuating mechanism can be on the curved basis of accent in the different sections of sheath pipe 10, can also make the different sections of sheath pipe 10 apart from the section in the different direction by the accent curved, realize three-dimensional space's regulation, more accurate regulation sheath pipe 10's spatial position, even face comparatively complicated physiology anatomical structure, also can be accurate reach the target site, satisfy the operation requirement. When the bending is adjusted, the driving mechanism applies traction to one bending adjusting wire 31, the other bending adjusting wire is synchronously released, and each bending adjusting assembly 30 comprises two bending adjusting wires 31, so that the driving mechanism drives each bending adjusting assembly 30 to adjust the bending of the sheath tube 10 in two directions, and the applicable scene of the bending adjusting medical apparatus 1 can be greatly increased.

In this embodiment, the anchoring rings 33 of the two bending adjusting assemblies 30 are disposed in one-to-one correspondence with the two bending adjustable sections 11, wherein one anchoring ring 33 is located at a far side of the bending adjustable section 11 close to the far end of the sheath 10, and the other anchoring ring 33 is located between the two bending adjustable sections 11, so that the far ends of the bending adjusting wires 31 in the two bending adjusting assemblies 30 are located in different radial planes of the sheath 10, that is, the far ends of the bending adjusting wires 31 in the two bending adjusting assemblies 30 keep a distance along the length direction of the sheath 10.

It should be noted that, in other embodiments, each bending adjustment assembly 30 may include only one bending adjustment wire 31, as long as the distal ends of the bending adjustment wires 31 of the two bending adjustment assemblies 30 are located at different circumferential positions of the sheath tube 10, and the distal ends of the bending adjustment wires 31 in the two bending adjustment assemblies 30 are located in different radial planes of the sheath tube 10, so that bending can be performed on different sections of the sheath tube 10 and in different directions, that is, bending can be performed on the sheath tube 10 in a three-dimensional space.

In an embodiment, the portions of the bending adjusting wires 31 of the two bending adjusting assemblies 30 in the sheath tube 10 are distributed in mutually perpendicular axial planes, and under the pulling action, the bending adjusting wires 31 of the two bending adjusting assemblies 30 can drive the sheath tube 10 to bend in the two mutually perpendicular bending adjusting planes.

As shown in fig. 5, the handle 40 of the present embodiment includes: a housing 41 forming a handle cavity, a knob 42 and a nipple 43. Housing 41 includes an outer shell 411, a distal cap 412, a knob holder 413 and a proximal cap 414. The knob seat 413 is provided with an opening 4131 for exposing a part of the structure therein through the opening 4231 to be interlocked with the knob 42.

The distal cap 412 and the knob seat 413 are provided with through holes through which the sheath 10 passes, and the proximal end of the sheath 10 is inserted into the housing 411 through the through holes.

One end of the knob seat 413 is fixedly connected with the distal end cover 412, the other end of the knob seat 413 is fixedly connected with the shell 411, and the rear end cover 414 is fixedly connected with the shell 411 to form a complete cavity structure.

The proximal end of sheath 10 is coupled to coupling 43 to form a delivery channel that extends through the lumen structure of handle 40 and is used to deliver implants, such as surgical instruments. In order to avoid the implant from being pushed in the combined delivery channel in a non-smooth manner, the sheath 10 and the coupling 43 are fixedly connected to the housing 41, while ensuring the connectivity, integrity and fixation of the delivery channel relative to the housing 41. By adopting the fixed connection mode, the combined conveying channel is changed into an integrated structure which can not rotate in a segmented manner, the problems that the implant is twisted and the position is uncontrollable and the like in the conveying process due to relative rotation of a certain section of the combined conveying channel are solved, and the pushing of the implant is facilitated. The tube fitting 43 of the present embodiment is a luer fitting.

The number of the knobs 42 is two, and the two knobs 42 are rotatably provided on the housing 41. The knobs 42 of this embodiment are each mounted on a knob holder 413. The knob base 413 is provided with a set of openings 4131. The knob seat 413 is further sleeved with a spacer 4132 for separating two adjacent knobs 42 to prevent one knob 42 from being mistakenly touched when the other knob 42 is rotated. The turning knob 42 of the bending adjusting wire 31 is arranged at the far end of the handle 40, and is in line with the ergonomics and convenient to operate and hold.

As shown in fig. 5 and fig. 6, the bending adjustable medical instrument 1 of the present embodiment further includes a driving mechanism 20, the driving mechanism 20 further includes two driving units 21, and the driving units 21 are disposed in one-to-one correspondence with the bending adjusting assemblies 30. A driving unit 21 pulls the bending adjusting component 30 close to the proximal end of the sheath tube 10, the bending adjusting component 30 drives the tube body of the sheath tube 10 to bend along a plane, and the whole sheath tube 10 is bent and deformed; another driving unit 21 pulls the bending adjusting assembly 30 near the distal end of the sheath tube 10, and the tube body of the sheath tube 10 is bent in another plane, so that the bending of the sheath tube 10 in two different planes is realized. In the embodiment, when one bending adjusting wire 31 of the bending adjusting assembly 30 is pulled by one driving unit 21, the bending adjusting wire 31 is released by the other bending adjusting wire 31 of the bending adjusting assembly 30, so that the bending adjusting assembly 30 is integrally pulled.

As shown in fig. 5 and 6, the two driving units 21 of the driving mechanism 20 of the present embodiment are disposed in the handle cavity of the handle 40, and the two driving units 21 are connected to the housing 41 of the handle 40 through the mounting seat 211. The driving units 21 are arranged in one-to-one correspondence with the knobs 42, and one driving unit 21 is controlled to move by one knob 42. The mounting positions of both the drive units 21 correspond to the positions where the openings 4131 are provided. The driving units 21 are connected to the ends of the corresponding bending wires 31, and can pull and release the bending wires 31 to adjust the shape of the sheath tube 10. The medical staff drives the corresponding driving unit 21 to rotate by rotating the knob 42, and pulls and winds the bending adjusting wire 31 fixed on the driving unit 21 to control the pulling and releasing of the bending adjusting wire 31. When the bending adjusting wire 31 is pulled, the sheath tube 10 is subjected to bending deformation, and when the bending adjusting wire 31 is released, the sheath tube 10 is restored to a straight tube. The bending procedure may be operated with one hand and the other hand of the medical practitioner may be used to push the implant into the sheath 10. In the present embodiment, the two driving units 21 have the same structure, and only have different arrangement directions, and both driving units form a certain angle along the circumferential direction of the sheath 10, but in the present embodiment, the two driving units 21 are preferably arranged at a perpendicular angle, but may also be arranged at other angles (for example, 60 ° or 30 °) in other embodiments.

As shown in fig. 7, the driving unit 21 of the present embodiment includes two winding parts 213, wherein the two winding parts 213 are both linked with the knob 42, and the two winding parts 213 are respectively located at two sides of the sheath 10. The bending adjusting wires 31 and the winding parts 213 are arranged in a one-to-one correspondence manner, the bending adjusting wires 31 and the winding parts 213 which are arranged in a corresponding manner are positioned on the same side of the sheath tube 10, and any bending adjusting wire 31 extends from a radial gap between the sheath tube 10 and the winding part 213 and is connected with the winding part 213 which is arranged in a corresponding manner. By adopting the wire discharging mode, the wire discharging angle is small, the pulling force applied to the bending adjusting wire 31 is mainly longitudinal force, the transverse (namely, the radial direction of the hand along the sheath tube 10) component force is small, and the bending adjusting is smoother and more labor-saving. Two bending adjusting wires 31 of the same bending adjusting assembly 30 are respectively wound on the two winding parts 213 after passing out from the wire outlet of the sheath tube 10. When the winding member 213 rotates, one bending wire 31 is pulled and the other bending wire 31 is released. The pulled bending adjusting wire 31 pulls the sheath tube 10 fixed with the wire, and drives the sheath tube 10 to bend towards one direction. Similarly, when the winding part 213 rotates in the reverse direction, the other bending wire 31 is pulled to drive the sheath tube 10 to bend in the reverse direction. The sheath 10 of the present embodiment can be bent in two directions, and can be adjusted to an optimum angle without rotating the sheath 10 in vitro, and can be adapted to more complicated anatomical structures.

As shown in fig. 7, the driving unit 21 of the present embodiment further includes two transmission members 212, the transmission member 212 is located between the two winding members 213, the transmission member 212 is linked with the two winding members 213, and the transmission member 212 and the winding members 213 are packaged together by the mounting seat 211 and are integrally and fixedly mounted in the knob seat 413. The inner wall of the knob 42 is provided with an inner gear ring, the knob 42 is sleeved on the knob seat 413, part of the transmission structure of the transmission part 212 is exposed out of the opening 4131 of the knob seat 413 and is meshed with the inner gear ring of the knob 42, and the transmission part 212 is linked with the knob 42. In the bending adjusting process, the knob 42 is rotated, the inner gear ring of the knob 42 is meshed with the transmission part 212, the transmission part 212 transmits the torque force applied to the knob 42 by an operator to the winding part 213, the knob 42 can drive the two winding parts 213 to rotate through the transmission part 212, and the control structure has the advantages of compact structure, stability, reliability, labor saving and the like.

As shown in fig. 8, the transmission member 212 of the present embodiment includes a transmission rod 2121. To save space, a plurality of transmission elements are integrated on the transmission rod 2121. As shown in fig. 9, the transmission rod 2121 comprises a worm 2122 and a gear 2123 which are coaxially connected, the worm 2122 is used for cooperating with the winding part 213, the gear 2123 is used for cooperating with an internal gear ring of the knob 42, so that the knob 42 drives the transmission rod 2121 to rotate, the number of the gear 2123 can be at least one, the number of the gear 2123 is two in this embodiment, and the two gears 2123 are located on two sides of the worm 2122. In other embodiments, the number of the gears 2123 may be one or more, and a plurality of gears 2123 are arranged longitudinally on both sides or one side of the worm 2122.

Referring to fig. 8 again, in order to prevent the gear 2123 of the transmission rod 2121 from directly engaging with the knob 42 and interfering with other transmission structures due to space, the transmission member 212 of the embodiment further includes an idler 2124, the idler 2124 is disposed parallel to the axis of the transmission rod 2121, and the idler 2124 is disposed parallel to the axis of the knob 42. An idler gear 2124 is provided for driving between the knob 42 and the gear 2123. In order to ensure the transmission balance, the transmission rod 2121 of the present embodiment has two gears 2123, and the two gears 2123 are connected to the worm 2122 at both sides of the worm 2122. The idler gear 2124 has a tooth width corresponding to the tooth width of both ends of the gear 2123 of the transmission lever 2121, and the idler gear 2124 meshes with the gears 2123 of both ends of the transmission lever 2121. When the knob 42 is adjusted, the idler gear 2124 is driven by the inner gear of the knob 42, and the rotational motion is transmitted to the gears 2123 at both ends of the transmission rod 2121 by the idler gear 2124. For good smooth engagement of the gear 2123, the gear 2123 is made of a self-lubricating polymer material or a metal material. The idle gear 2124, the transmission rod 2121 and the worm wheel 2132 are meshed to form a transmission unit.

As shown in fig. 8, both winding parts 213 of the present embodiment include a winding post 2131 for winding the bending wire 31. The two winding posts 2131 are located on two radial sides of the sheath tube 10, the two winding posts 2131 are located on two radial sides of the worm 2122, worm wheels 2132 meshed with the worm 2122 are arranged on the two winding posts 2131, and the worm 2122 drives the worm wheels 2132 to rotate. The two winding posts 2131 are arranged on two sides of the driving rod 2121, the driving rod 2121 is arranged perpendicular to the axis of the winding posts 2131, the knob 42 is arranged parallel to the axis of the driving rod 2121, and the gear 2123 of the driving rod 2121 is meshed with the inner gear ring of the knob 42 to drive the two winding posts 2131 to rotate. The gear 2123 of the transmission rod 2121 is driven by the knob 42 to rotate, and the worm 2122 of the transmission rod 2121 rotates together with the same, so as to drive the worm wheel 2132 of the winding post 2131 to rotate, and finally, the winding post 2131 is integrally rotated. The end part of the bending adjusting wire 31 is fixedly connected with the winding post 2131, the bending adjusting wire 31 rotates along with the winding post and is pulled and wound, and the self-locking structure of the worm gear can realize self-locking at any position after the knob 42 is released.

In other embodiments, if the number of the bending wires 31 of the two bending adjusting assemblies 30 is one, the number of the winding parts 213 corresponding to the number of the bending adjusting assemblies is also one, as long as the winding parts 213 can wind and release the bending wires 31.

As shown in FIG. 8, to ensure balanced forces, two sets of transmission structures are symmetrically arranged along the diameter direction of the knob 42. The number of the worm gears 2132 of the winding post 2131 is two, and the two worm gears 3132 are located at two ends of the winding post 2131. Two sets of driving rods 2121 and idler wheels 2124 are symmetrically arranged in the diameter direction of the knob 42, the two wrapping posts 2131 are arranged on both sides of the pair of driving rods 2121, and worms 2122 of the two driving rods 2121 are respectively meshed with worm wheels 2132 at one ends of the two wrapping posts 2131. The knob 42 drives a pair of driving rods 2121 to rotate through the idle wheel 2124, the worm 2122 of one driving rod 2121 drives the worm wheel 2132 at one end of the two winding posts 2131 to rotate, and the worm 2122 of the other driving rod 2121 drives the worm wheel 2132 at the other end of the two winding posts 2131 to rotate. Of course, as shown in fig. 10, in another embodiment, only one set of transmission structures may be provided, and the knob 42 drives the two winding posts 2131 to rotate only through one transmission rod 2121.

As shown in fig. 11, the winding post 2131 of this embodiment further has a winding groove 2133 for limiting the winding position of the bending wire 31 on the winding post 2131. The winding groove 2133 is arranged along the axial direction of the winding post 2131, the winding groove 2133 is inwards recessed along the radial direction of the winding post 2131, and the bending adjusting wire 31 is wound in the winding groove 2133 in the rotating process of the winding post 2131. The winding post 2131 of this embodiment is further provided with a bending wire 31 fixing assembly 2134 for fixing the bending wire 31 to the winding post 2131. The bending adjusting wire 31 fixing assembly 2134 comprises a bending adjusting wire 31 fixing piece 2135 and a fixing piece clamping groove 2136 arranged on the winding post 2131. The size of the fastener slot 2136 corresponds to the size of the fastener 2135 of the bending adjusting wire 31. The fixing piece 2135 of the bending adjusting wire 31 is inserted into the fixing piece clamping groove 2136. The bending adjusting wire 31 is connected with a fixing part 2135 of the bending adjusting wire 31. In order to prevent the fixing piece 2135 of the bending adjusting wire 31 from falling off from the fixing piece clamping groove 2136, the fixing piece 2135 of the bending adjusting wire 31 in the embodiment is of a conical structure, the conical surface angle of the outer surface is 5-7 degrees, and the bending adjusting wire can be made of metal alloys such as stainless steel and brass. The bending adjusting wire 31 fixing part 2135 is provided with a slot, and the bending adjusting wire 31 is bound on the slot opening. The winding column 2131 is provided with a bending adjusting wire channel 12 which is communicated with the fixing piece clamping groove 2136, one end of the bending adjusting wire 31 is connected with the fixing piece 2135 of the bending adjusting wire 31, and the other end of the bending adjusting wire 31 penetrates out of the column body of the winding column 2131 through the bending adjusting wire channel 12. The direction of the pulling force applied to the bending adjusting wire 31 is consistent with the direction of the fixing piece 2135 of the bending adjusting wire 31 inserted into the fixing piece clamping groove 2136, when the bending adjusting wire 31 is pulled, the pulling force applied to the bending adjusting wire 31 tightly attaches the conical surface of the fixing piece 2135 of the bending adjusting wire 31 to the inner wall surface of the fixing piece clamping groove 2136, the bending adjusting wire 31 between the two is pressed tightly, and the bending adjusting wire 31 is ensured not to slip.

In order to ensure smooth meshing, the transmission ratio range of the worm wheel 2132 and the worm 2122 is as follows: 7.5-13, the gear ratio of the embodiment is 8. The number of teeth of the worm wheel 2132 is 30-40, 32 teeth are selected in the embodiment, the worm 2122 meshed with the teeth is a multi-start thread, and a four-start thread is selected in the embodiment. The range of gear ratios of gear 2123 to knob 42 is: 4-7.5, and the gear ratio of the embodiment is 5. The number of teeth of the gear 2123 is 20 to 30, 26 teeth are selected for the embodiment, the number of teeth of the knob 42 is 120 to 150, and 140 teeth are selected for the embodiment.

After the two bending adjusting wires 31 of the same bending adjusting assembly 30 of this embodiment are drawn out from the sheath tube 10, the bending adjusting wires 31 extend from the radial gap between the sheath tube 10 and the winding part 213, and are wound in the winding grooves 2133 on the same side, and the winding directions of the two bending adjusting wires 31 are opposite. The knob 42 drives the two winding posts 2131 to rotate in the same direction through the transmission rod 2121, so that one bending adjusting wire 31 is pulled, and the other bending adjusting wire 31 is released.

As shown in fig. 12 to 13, in order to realize the same direction rotation with a compact structure, the worm 2122 of the driving rod 2121 of the present embodiment is provided with two spiral lines crossing in the same direction, the tooth direction of the worm wheel 2132 of the winding post 2131 corresponds to the same spiral line, that is, the tooth direction of the worm wheel 2132 provided on both sides of the worm 2122 is opposite, and the worm wheels 2132 of the two winding posts 2131 are meshed with the worm 2122 to rotate in the same direction by the design of the two-way crossing spiral lines. The knob 42 is rotated to drive the worm 2122 to rotate through the transmission of gear meshing, and the bidirectional crossed spiral line on the worm 2122 enables the worm wheel 2132 with opposite teeth on two sides to rotate in opposite directions, so that two bending adjusting wires 31 are controlled simultaneously, when one bending adjusting wire 31 is pulled, the other bending adjusting wire 31 is released, and the bending of the distal end of the sheath tube 10 in two directions on the same plane is realized. In order to make the winding post 2131 closer to the central axis of the sheath tube 10, the wire-drawing angle can be reduced. In another embodiment, the sheath 1030 has a cut portion on the outer edge thereof, and the sheath 1030 can accommodate at least a portion of the column of the winding post 2131.

In actual operation, the medical staff holds the handle 40 with one hand to adjust the bending shape of the distal end of the sheath tube 10 in stages. First, a knob 42 is rotated in a certain direction, the knob 42 drives the corresponding transmission component 212 to rotate, so that the winding component 213 rotates, the bending adjusting wire 31 wound on the winding component 213 is pulled, and the distal end of the sheath 10 of the bending adjusting wire 31 is bent and deformed to one side. Similarly, when the knob 42 is rotated in the opposite direction, the distal end of the sheath 10 is bent toward the other side. After the bending angle of the sheath 10 is adjusted to the right position, the other knob 42 is rotated, and the sheath 10 is bent in the other plane in the same operation steps.

The above description is only a preferred embodiment of the present application and is not intended to limit the scope of the present application, and it should be understood that all modifications and obvious variations of the present application, which are made by the present specification and drawings, should be included in the scope of the present application.

Claims (12)

1. The utility model provides a medical apparatus that can bend which characterized in that, includes sheath pipe, actuating mechanism and two sets of subassemblies that bend of transferring, it includes that at least one transfers the curved silk to transfer curved subassembly, belongs to same transfer curved subassembly the distal end of transferring the curved silk is located the same radial face of sheath pipe, the distal end of transferring the curved silk of two sets of subassemblies that bend is located the different circumferential position of sheath pipe, and with sheath pipe distal end links to each other, the distal end of transferring the curved silk in two sets of subassemblies that bend is located in the radial plane of the difference of sheath pipe, the proximal end of transferring the curved silk of two sets of subassemblies that bend all extends the sheath pipe, and with actuating mechanism links to each other, under actuating mechanism's effect, two sets of subassemblies that bend can drive the sheath pipe is crooked in two different planes of transferring.

2. The medical bending-adjustable instrument according to claim 1, wherein the number of the bending-adjustable wires of the bending-adjustable assembly is two, the two bending-adjustable wires belonging to the same bending-adjustable assembly extend along the same axial plane of the sheath tube, the bending-adjustable wires of the two bending-adjustable assemblies are partially distributed in two mutually perpendicular axial planes in the sheath tube, and the bending-adjustable wires of the two bending-adjustable assemblies can drive the sheath tube to bend in the two mutually perpendicular bending-adjustable planes under the pulling action of the driving mechanism.

3. The medical bending-adjustable instrument as claimed in claim 1, wherein the number of the bending-adjustable wires of the bending-adjustable assembly is two, the two bending-adjustable wires belonging to the same bending-adjustable assembly are oppositely arranged along the radial direction of the sheath tube, and when the driving mechanism applies a pulling force to one bending-adjustable wire of the bending-adjustable assembly, the other bending-adjustable wire of the bending-adjustable assembly can be released.

4. The adjustable bending medical instrument according to claim 1, wherein the sheath comprises two adjustable bending sections spaced apart from each other along the length direction thereof, the two sets of adjustable bending assemblies are disposed in one-to-one correspondence with the two adjustable bending sections, a distal end of the bending adjusting wire of one of the adjustable bending assemblies is located at a distal side of the adjustable bending section near the distal end of the sheath, and a distal end of the bending adjusting wire of the other of the adjustable bending assemblies is located between the two adjustable bending sections.

5. The medical bending-adjustable instrument as claimed in claim 1, further comprising a handle connected to the sheath, wherein the handle comprises a housing and a knob rotatably disposed on the housing, the housing forms a handle cavity, the driving mechanism comprises a driving unit, the driving unit and the bending-adjustable component are disposed in a one-to-one correspondence manner, the driving unit is disposed in the handle cavity, and the knob is driven by an external force to rotate to drive the driving unit to move, so as to pull or release the bending-adjustable wire.

6. The medical apparatus of claim 5, wherein the driving unit comprises a winding member, the winding member and the winding member are disposed in a one-to-one correspondence, both the winding member are linked to the knob, both the winding member are disposed on two sides of the sheath tube, the winding member and the winding member are disposed in a one-to-one correspondence, the winding member and the winding member disposed in a corresponding relationship are disposed on the same side of the sheath tube, and any of the winding members is extended by a radial gap between the sheath tube and the winding member and connected to the winding member disposed in a corresponding relationship.

7. The adjustable bend medical instrument of claim 6, wherein said knob rotates said two winding posts in the same direction.

8. The adjustable bending medical instrument according to claim 6, wherein the driving unit comprises at least one transmission member, the transmission member is linked to the rotation knob, and the transmission member is linked to the two winding members, and the rotation knob can drive the two winding members to rotate through the transmission member.

9. The adjustable bending medical apparatus according to claim 8, wherein the number of the transmission members is one, the transmission member comprises a transmission rod, the transmission rod comprises a worm and a gear which are coaxially connected, each of the two winding members comprises a winding post, each of the two winding posts is provided with a worm wheel which is engaged with the worm, the two winding posts are arranged on two sides of the transmission rod, the gear of the transmission rod is engaged with an inner gear ring of the knob to drive the two winding posts to rotate, and the end of the bending wire is fixedly connected with the winding posts.

10. The adjustable bending medical apparatus as claimed in claim 9, wherein the worm is provided with two spiral lines crossing each other, the worm wheel has a tooth direction corresponding to the spiral line on the same side, and the worm wheels of the two winding posts rotate in the same direction after being engaged with the worm.

11. The adjustable bending medical instrument according to claim 9, wherein the winding post is provided with a winding groove, the winding groove is recessed inward in a radial direction of the winding post, and the bending wire is wound in the winding groove.

12. The adjustable bending medical apparatus according to claim 8, wherein the number of the worm gears of the winding post is two, the two worm gears are located at two ends of the winding post, two transmission rods are symmetrically arranged in a diameter direction of the knob, and worms of the two transmission rods are respectively engaged with the worm gears at one ends of the two winding posts.

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