Sheath Bending Adjustment Handle, Delivery Device and Valve Repair System

Abstract

The present invention relates to a sheath bending handle, a delivery device and a valve repair system. The sheath bending handle is used to pull the traction wire of the sheath so that the distal end of the sheath bends in a set direction. The sheath bending handle proposed by the present invention includes at least one set of driving components and at least one wire winding and locking mechanism. The wire winding and locking mechanism includes a main shaft, a wire winding wheel and a wire pressing member. The main shaft is in transmission connection with the driving components; the wire winding wheel is sleeved on the main shaft, and at least one wire winding groove is circumferentially arranged on the outer wheel wall of the wire winding wheel. The wire winding wheel is provided with at least one set of intersecting and communicating wire passing holes and wire locking holes in a direction perpendicular to the axial direction. The part of the traction wire extending from the sheath is wound around the wire winding groove, and a part of the wire segment near the end of the traction wire extends into the wire passing hole; the wire pressing member is arranged in the wire locking hole and presses the traction wire. The sheath bending handle proposed by the present invention can ensure the stability of the traction wire and avoid the traction wire falling off or breaking in the sheath bending handle.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a sheath bending handle, a delivery device and a valve repair system. Background Art

[0002] Interventional therapy is a minimally invasive treatment method, and its applicable fields are also becoming wider and wider. Usually, a sheath is introduced into a patient's body under the guidance of a medical imaging device, and a passage is established through the sheath to deliver implants such as drugs or instruments. For example, when applied in the field of valve repair, the distal end of the sheath can be connected to and deliver a valve clip, an artificial valve, etc.

[0003] Due to the complex structure of the human heart and blood vessels, in order to ensure that the sheath can pass through smoothly and to ensure that the implant can reach the accurate set position, usually the tube section near the distal end of the sheath is made into a structure that can be bent independently, and a pulling wire is set. The distal end of the pulling wire is connected to the bendable part, and the proximal end of the pulling wire is for the operator to pull, so as to drive the distal end of the sheath to bend.

[0004] The sheath bending handle in the related art is used to pull the pulling wire. However, when the distal end of the sheath is in a bent state, the pulling wire is subjected to the pulling force of the distal end of the sheath, resulting in instability of the proximal end of the pulling wire connected inside the handle. Therefore, during the use of the sheath bending handle, the pulling wire has a risk of falling off or even breaking, which easily affects the surgical effect. Summary of the Invention

[0005] The purpose of the present invention is to at least solve the problem that the pulling wire may fall off or break in the sheath bending handle. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides a sheath bending handle, which is used to pull the pulling wire of the sheath to bend the distal end of the sheath in a set direction. The sheath bending handle includes at least one set of driving components and at least one wire winding and locking mechanism, and the wire winding and locking mechanism includes:

[0007] A main shaft, which is in transmission connection with the driving component;

[0008] A wire winding wheel, which is sleeved on the main shaft. At least one wire winding groove is circumferentially provided on the outer wheel wall of the wire winding wheel. The wire winding wheel is provided with at least one set of intersecting and communicating wire passing holes and wire locking holes in a direction perpendicular to the axial direction. The part of the pulling wire extending from the sheath is wound around the wire winding groove, and the part of the pulling wire near the end extends into the wire passing holes;

[0009] A wire pressing member, which is arranged in the wire locking hole and presses the pulling wire.

[0010] The sheath tube bending adjustment handle proposed in the embodiment of the present invention winds and stores the pulling wire on the wire winding wheel through the wire winding groove. On the basis of ensuring the ability to pull the pulling wire, the stability of the pulling wire during the pulling process is improved, and the pulling wire is prevented from falling off. By providing a wire passing hole on the wire winding wheel, the pulling wire extends into the wire passing hole after winding, further improving the stability of the pulling wire and avoiding interference of the proximal end of the pulling wire by other components. By providing a wire locking hole and a wire pressing member to press and fix the part of the pulling wire located in the wire passing hole, the reliability of the connection between the pulling wire and the wire winding wheel is improved, and the possibility of the pulling wire breaking is reduced. Therefore, the sheath tube bending adjustment handle proposed in this embodiment can ensure the stability of the pulling wire and solve the problem that the pulling wire may fall off or break in the sheath tube bending adjustment handle.

[0011] In addition, the sheath tube bending adjustment handle proposed in the embodiment of the present invention may also have the following technical features:

[0012] In some embodiments of the present invention, along the axial direction of the wire winding wheel, the width of the wire winding groove is greater than or equal to the outer diameter of the sheath tube to accommodate a part of the tube section of the sheath tube, and the bottom surface of the wire winding groove is in contact with and / or the shape is consistent with the side wall of the sheath tube.

[0013] In some embodiments of the present invention, a sheath tube avoidance groove is further provided on the outer wheel wall of the wire winding wheel. Along the axial direction of the wire winding wheel, the width of the sheath tube avoidance groove is greater than or equal to the outer diameter of the sheath tube to accommodate a part of the tube section of the sheath tube, and the bottom surface of the sheath tube avoidance groove is in contact with and / or the shape is consistent with the side wall of the sheath tube.

[0014] In some embodiments of the present invention, there are two wire winding grooves, and along the axial direction of the wire winding wheel, the two wire winding grooves are respectively located on both sides of the sheath tube avoidance groove.

[0015] In some embodiments of the present invention, the wire passing hole and the wire locking hole respectively penetrate through the wire winding wheel along the radial direction of the wire winding wheel from the bottom surface of the wire winding groove.

[0016] In some embodiments of the present invention, the axis of the wire locking hole is perpendicular to the axis of the wire passing hole.

[0017] In some embodiments of the present invention, there is at least one group of wire pressing members, and the number of each group of wire pressing members is two. The two wire pressing members are respectively inserted into the wire locking hole from both ends of the wire locking hole and are abutted against each other to clamp the pulling wire.

[0018] In some embodiments of the present invention, at least one group of intersecting and connected first axial holes and second axial holes are radially arranged on the main shaft, the first axial hole is coaxially arranged with the wire passing hole, the second axial hole is coaxially arranged with the wire locking hole, and the inner wall of the second axial hole is provided with a thread.

[0019] In some embodiments of the present invention, the wire pressing member is configured as a stud, and / or the end surface of the wire pressing member for pressing the pull wire is provided with concave-convex stripes.

[0020] In some embodiments of the present invention, a baffle is further provided on the winding wheel, and the baffle is located at the notch of the winding groove to block the pulling line.

[0021] In some embodiments of the present invention, the drive assembly includes a knob, a worm and a worm wheel connected in sequence, the worm wheel is connected to the main shaft, and the sheath bending handle also includes a shell and a sheath fixing assembly and a limiting mechanism arranged in the shell, the sheath fixing assembly is used to fix the sheath, and the limiting mechanism is used to limit the winding wheel to rotate within a set range and / or in a set direction.

[0022] A second aspect of the present invention provides a delivery device, comprising at least one sheath and at least one sheath bending handle according to any of the above embodiments, wherein a portion of the sheath close to the proximal end is inserted into the sheath bending handle.

[0023] The delivery device proposed in the present invention has the same advantages as the above-mentioned sheath tube bending handle, which will not be described in detail here.

[0024] A third aspect of the present invention provides a valve repair system, which includes a valve clamp and a delivery device according to the above embodiment, wherein the delivery device is used to deliver the valve clamp, and the distal end of the sheath is detachably connected to the valve clamp.

[0025] The valve repair system proposed in the present invention has the same advantages as the above-mentioned sheath bending handle and delivery device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following is a brief introduction to the drawings in the implementation manner. Those skilled in the art can also derive other drawings based on these drawings without any creative work.

[0027] Figure 1 This is a schematic structural diagram of a sheath tube bending adjustment handle according to Embodiment 1 of the present invention;

[0028] Figure 2 It is a schematic diagram of the partial structure of the sheath tube bending adjustment handle according to the first embodiment of the present invention;

[0029] Figure 3 Exploded view of the structure of the sheath bending handle according to the first embodiment of the present invention;

[0030] Figure 4 Partial structural schematic diagram of the sheath bending handle including the top cover according to the first embodiment of the present invention;

[0031] Figure 5 Schematic diagram of a structure of the sheath fixing assembly in the sheath bending handle according to the first embodiment of the present invention;

[0032] Figure 6 For Figure 5 Cross-sectional view of the sheath fixing assembly shown;

[0033] Figure 7 Schematic diagram of another structure of the sheath fixing assembly in the sheath bending handle according to the first embodiment of the present invention;

[0034] Figure 8 For Figure 7 Cross-sectional view of the sheath fixing assembly shown;

[0035] Figure 9 Schematic diagram of a structure of the wire winding locking mechanism in the sheath bending handle according to the first embodiment of the present invention;

[0036] Figure 10 Schematic diagram of another structure of the wire winding locking mechanism in the sheath bending handle according to the first embodiment of the present invention;

[0037] Figure 11 For Figure 9 Front view of the wire winding wheel and the main shaft in the wire winding locking mechanism shown;

[0038] Figure 12 For Figure 11 A cross-sectional view in the A-A direction in;

[0039] Figure 13 For Figure 11 Another cross-sectional view in the A-A direction in;

[0040] Figure 14 For Figure 9 Front view of the wire winding locking mechanism and the pulling wire shown;

[0041] Figure 15 For Figure 14 Cross-sectional view in the B-B direction in;

[0042] Figure 16 Partial structural schematic diagram of the sheath bending handle according to the second embodiment of the present invention;

[0043] Figure 17 Schematic diagram of the structure of the sheath bending handle according to the third embodiment of the present invention;

[0044] Figure 18 Partial structural schematic diagram of the sheath tube bending adjustment handle according to the third embodiment of the present invention Figure One ;

[0045] Figure 19 Partial structural schematic diagram of the sheath tube bending adjustment handle including a top cover according to the third embodiment of the present invention;

[0046] Figure 20 Partial structural schematic diagram in the sheath tube bending adjustment handle according to the third embodiment of the present invention Figure Two ;

[0047] Figure 21 A structural schematic diagram of the delivery device according to the embodiment of the present invention;

[0048] Figure 22 A structural schematic diagram of the valve repair system according to the embodiment of the present invention.

[0049] The reference signs in the drawings are represented as follows:

[0050] 1000, delivery device; 2000, sheath tube; 3000, pulling wire; 3001, first pulling wire; 3002, second pulling wire; 3003, third pulling wire; 4000, valve clip; 5000, valve repair system;

[0051] 100, sheath tube bending adjustment handle;

[0052] 10, housing; 11, top cover; 12, bottom shell; 101, sheath tube channel; 102, mounting seat; 1021, first groove; 1022, second groove;

[0053] 20, wire winding locking mechanism; 201, first wire winding locking mechanism; 202, second wire winding locking mechanism; 21, main shaft; 2101, first main shaft; 2102, second main shaft; 211, first shaft hole; 212, second shaft hole; 22, wire winding wheel; 2201, first wire winding wheel; 2202, second wire winding wheel; 221, wire winding groove; 2211, first wire winding groove; 2212, second wire winding groove; 2213, third wire winding groove; 222, sheath tube avoidance groove; 223, wire passing hole; 224, wire locking hole; 23, wire pressing member;

[0054] 30, drive assembly; 301, first drive assembly; 302, second drive assembly; 31, knob; 32, worm; 33, worm gear;

[0055] 40, sheath tube fixing assembly; 41, pressing ring; 42, fixing flange; 421, central hole; 43, shrinkage ring; 431, support ring; 432, movable piece; 44, abutting member;

[0056] 50. Bearing; 60. Pointer; 70. Limit mechanism; 701. First limit mechanism; 702. Second limit mechanism; 71. Rotating member; 711. First rotating rod; 712. Second rotating rod; 72. Limit plate; 80. Wire blocking rod; 90. Gear set. Detailed implementation manner

[0057] As described in the background art, during the process of controlling the bending of the sheath tube by the existing sheath tube bending handle, due to the reverse force of the sheath tube on the traction wire, the traction wire is likely to fall off or break in the handle, affecting the surgical effect and even posing a safety risk. In response to this, the present invention proposes a sheath tube bending handle, which is provided with a main shaft and a wire winding wheel in the handle, and winds the traction wire extending from the sheath tube in the wire winding groove of the wire winding wheel to improve the stability of the traction wire during the pulling process and reduce the possibility of falling off. At the same time, by providing a wire passing hole on the wire winding wheel to place the proximal part of the traction wire, and providing a wire locking hole and a wire pressing member to fix the part of the traction wire located in the wire passing hole, the reliability of the connection between the traction wire and the wire winding wheel is improved, and the possibility of breakage is reduced. It can be seen that the sheath tube bending handle proposed by the present invention can ensure the stability of the traction wire and avoid the traction wire from falling off or breaking in the handle.

[0058] The following will combine the drawings in the embodiments of the present invention. The terms used in the text are only for the purpose of describing specific example embodiments and cannot be understood as a limitation of the present invention. For example, the terms "including" and "having" not only indicate the existence of the stated features, but also do not exclude the existence of other features; the terms "first" and "second" do not imply order or sequence; the terms "inside", "outside", "above", and "below" are only for facilitating the description of the relationship of one feature shown in the drawings relative to another feature, and do not indicate that it must have a specific orientation. It should be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device in the natural state. In the description of the present invention, the above definitions are only for the convenience of expression and cannot be understood as a limitation of the present invention.

[0059] Please refer to Figures 1 to 3 and, in combination with reference to Figures 9 to 15The embodiment of the present invention provides a sheath bending handle 100, which is used to pull the pulling wire 3000 of the sheath 2000 to bend the distal end of the sheath 2000 in a set direction. The sheath bending handle 100 provided in this embodiment includes at least one set of driving components 30 and at least one winding locking mechanism 20, the winding locking mechanism 20 includes a main shaft 21, a winding wheel 22 and a wire pressing member 23, the main shaft 21 is connected to the driving component 30 by transmission; the winding wheel 22 is connected to the wire pressing member 23 by transmission; The wheel 22 is sleeved on the main shaft 21, and the outer wheel wall of the winding wheel 22 is provided with at least one winding groove 221 along the circumferential ring. The winding wheel 22 is provided with at least one group of intersecting and connected wire holes 223 and wire locking holes 224 along the direction perpendicular to the axial direction. The part of the traction wire 3000 extending from the sheath is wound around the winding groove 221, and the part of the traction wire 3000 close to the end is extended into the wire hole 223; the wire pressing member 23 is arranged in the wire locking hole 224 and presses the traction wire 3000.

[0060] The sheath tube bending handle 100 proposed in this embodiment can be used in a delivery device 1000. The sheath tube bending handle 100 is used in conjunction with one or more sheath tubes 2000 to bend the distal end of the sheath tube 2000 in a set direction according to demand. It can be understood that the distal end of the sheath tube 2000 has a bendable tube section, and a pull wire 3000 connected to the bendable tube section is provided in the sheath tube 2000. The distal end of the pull wire 3000 is connected to the bendable tube section, and the proximal end of the pull wire 3000 is for the operator to pull. In this embodiment, the drive assembly 30 drives the winding locking mechanism 20 to rotate, thereby pulling the pull wire 3000.

[0061] In this embodiment, the pulling wire 3000 is wound and stored on the winding wheel 22 by setting the winding groove 221, which improves the stability of the pulling wire 3000 during the pulling process and prevents the pulling wire 3000 from falling off while ensuring that the pulling wire 3000 can be pulled; by setting the wire hole 223 on the winding wheel 22, the pulling wire 3000 is inserted into the wire hole 223 after winding, which further improves the stability of the pulling wire 3000 and avoids the proximal end of the pulling wire 3000 being exposed to other parts. Parts interfere; by providing a wire locking hole 224 and a wire pressing member 23, the part of the pulling wire 3000 located in the wire through hole 223 is pressed and fixed, thereby improving the reliability of the connection between the pulling wire 3000 and the winding wheel 22. Compared with gluing and fixing, this method reduces the possibility of breakage of the pulling wire 3000. It can be seen that the sheath bending adjustment handle 100 proposed in this embodiment can ensure the stability of the pulling wire 3000, and prevent the pulling wire 3000 from falling off or breaking in the sheath bending adjustment handle 100.

[0062] On the basis of the above-mentioned embodiments, the sheath bending handle 100 proposed in this embodiment includes a shell 10, at least one winding locking mechanism 20 and at least one group of drive components 30. The shell 10 is provided with a sheath channel 101 for the sheath 2000 to be partially inserted into the shell 10; the winding locking mechanism 20 is arranged in the shell 10, and each group of drive components 30 cooperates with a winding locking mechanism 20. The drive component 30 includes a knob 31, a worm 32 and a worm wheel 33 connected in sequence. The worm wheel 33 is connected to the main shaft 21 to drive the winding wheel 22 to rotate. During use, the knob 31 can drive the worm 32 to rotate, and the worm wheel 33 connected to the worm 32 can drive the winding wheel 22 to rotate, thereby pulling the pulling wire 3000. The present embodiment utilizes the restraining function of the winding wheel 22 on the traction wire 3000, combined with the self-locking function of the worm gear mechanism, so that the operator only needs to rotate a knob 31 to pull the traction wire 3000, and the rotation can be stopped at any time during this process. There is no need to lock the traction wire 3000 separately to ensure that the traction wire 3000 will not be retracted due to the pulling force of the sheath 2000. In other words, the operator can control the bending degree of the sheath 2000 only by the rotation angle of the knob 31, and can maintain the sheath 2000 in a certain bending state when the knob 31 stops rotating. Therefore, the sheath bending handle 100 proposed in the present embodiment has a simple and compact structure, a small overall size, and is light, which improves the operator's experience of use, and is easy to operate. The traction wire 3000 has good stability during use, which is beneficial to improving the surgical effect.

[0063] Please continue reading Figure 2 , Figure 3 and Figure 4 , a containing space is formed inside the shell 10, and a part of the sheath tube 2000, the winding locking mechanism 20, and the worm wheel 33 and worm 32 are placed inside the shell 10. In this embodiment, the shell 10 may include a top cover 11 and a bottom shell 12. The top cover 11 and the bottom shell 12 are buckled and connected. The connection method may be snap-fit, welding, or connection through fasteners such as bolts and screws. The connection method of the top cover 11 and the bottom shell 12 through fasteners is not only convenient for the manufacture and assembly of the shell 10, but also convenient for subsequent maintenance or replacement of the components inside the shell 10. Furthermore, the top cover 11 and the bottom shell 12 can be formed by three-dimensional printing or injection molding, respectively, and the outer walls of the top cover 11 and the bottom shell 12 can also be provided with recessed parts to facilitate the operator to hold during use. This embodiment does not specifically limit the shape and molding method of the shell 10.

[0064] For further information, please refer to Figure 1 and Figure 4, in this embodiment, a sheath tube channel 101 for the sheath tube 2000 to pass through is provided on the housing 10. It can be understood that the tube section of the sheath tube 2000 near the proximal end needs to be located in the sheath tube bending adjustment handle 100. There are two sheath tube channels 101, and the two sheath tube channels 101 are respectively arranged on two opposite side walls of the housing 10. The sheath tube 2000 extends into the housing 10 from one sheath tube channel 101 and extends out from the other sheath tube channel 101, thereby improving the stability of the proximal part of the sheath tube 2000 and preventing the sheath tube 2000 from shaking excessively. In this embodiment, the sheath tube channel 101 can be set as a circular through hole matching the sheath tube 2000, or can be set as a through hole of other shapes.

[0065] Further, please refer to Figure 2 and Figure 3 , in some embodiments of the present invention, the sheath tube bending adjustment handle 100 further includes a sheath tube fixing assembly 40. The sheath tube fixing assembly 40 is connected to the housing 10 and can hold the sheath tube 2000 tightly to prevent the sheath tube 2000 from moving or rotating relative to the housing 10, for further fixing the sheath tube 2000 and improving the stability of the sheath tube 2000. The number of the sheath tube fixing assemblies 40 can be set to one group or two groups. Exemplarily, according to the above embodiment where there are two sheath tube channels 101, the sheath tube fixing assembly 40 can be set to one group and be arranged near one of the sheath tube channels 101, so as to improve the stability of the sheath tube 2000.

[0066] In this embodiment, there are various structures of the sheath tube fixing assembly 40. In an optional embodiment, please continue to refer to Figure 2 and Figure 3 , and in combination with referring to Figure 5 and Figure 6 , each group of sheath tube fixing assemblies 40 includes two relatively arranged pressing rings 41. The two pressing rings 41 are buckled and connected to hold the sheath tube 2000 tightly, so that the sheath tube 2000 cannot move axially and cannot rotate, which is beneficial to the stability of the sheath tube 2000 and the pulling wire 3000 extending from the sheath tube 2000. Exemplarily, the structures of the two pressing rings 41 are the same. As shown in Figure 6 , the cross-sectional shape of the part of the pressing ring 41 that holds the sheath tube 2000 is arc-shaped or semi-circular. Connecting plates are extended on both sides of the pressing ring 41. When the two pressing rings 41 are buckled and connected, the connecting plates on the same side of the two pressing rings 41 are aligned and abutted. On this basis, the two connecting plates can be connected by welding, or fasteners can be passed through the two connecting plates to connect the two pressing rings 41 and hold the sheath tube 2000 tightly.

[0067] On the basis of the above embodiment, please refer to Figure 4, a mounting seat 102 for mounting the sheath fixing assembly 40 may also be provided on the housing 10. The mounting seat 102 may be provided inside the housing 10 or outside the housing 10, and the mounting seat 102 is formed on the housing 10 by an integrally formed manner. When the housing 10 includes a top cover 11 and a bottom case 12, the mounting seat 102 may be provided on the top cover 11 or the bottom case 12, or mounting seats 102 are provided on both the top cover 11 and the bottom case 12. Exemplarily, a first mounting seat is provided at a position of the top cover 11 close to the bottom case 12, a second mounting seat is provided at a position of the bottom case 12 close to the top cover 11, and recessed portions are respectively provided on the side wall of the top cover 11 close to the first mounting seat and the side wall of the bottom case 12 close to the second mounting seat. With reference to Figure 3 , when the top cover 11 and the bottom case 12 are buckled, the two recessed portions enclose to form a sheath channel 101.

[0068] Based on the above embodiments, please continue to refer to Figure 4 , Figure 5 and Figure 6 , when the sheath fixing assembly 40 includes two pressing rings 41, the two pressing rings 41 are connected by a fastener, and the fastener may be a screw or a bolt. On this basis, first grooves 1021 matching the pressing rings 41 are respectively provided on the first mounting seat and the second mounting seat, the two first grooves 1021 are oppositely arranged, the shape of the first groove 1021 is adapted to the shape of the pressing ring 41, and each pressing ring 41 is at least partially embedded in the first groove 1021. During the assembly process, the two pressing rings 41 may be connected to the sheath 2000 first and then placed on the first grooves 1021 of the first mounting seat or the second mounting seat. When the top cover 11 and the bottom case 12 are buckled and connected, the two first grooves 1021 are buckled to form a receiving space for receiving the two pressing rings 41, so that a partial pipe section of the sheath 2000 and the sheath fixing assembly 40 are fixed in the housing 10. Such a setting method is convenient for assembly and further improves the stability of the sheath fixing assembly 40 and the sheath 2000.

[0069] Further, please continue to refer to Figure 4, the mounting seat 102 is also provided with a second groove 1022, and the second groove 1022 is used to accommodate the end of the fastener. Exemplarily, the second groove 1022 can be provided on the first mounting seat, or on the second mounting seat, or the first mounting seat and the second mounting seat are respectively provided with the second groove 1022, and the two second grooves 1022 are arranged opposite to each other, respectively matching the two ends of the fastener, which can not only accommodate the end of the fastener to connect the sheath fixing assembly 40 with the housing 10, but also prevent the sheath fixing assembly 40 from shaking on the mounting seat 102. Therefore, the provision of the second groove 1022 further improves the stability of the sheath fixing assembly 40, and further improves the stability of the sheath 2000. In addition, the sheath fixing assembly 40 and the housing 10 can be further welded to improve the connection reliability, for example, the pressure ring 41 is welded to the first groove 1021, or the fastener is welded to the second groove 1022, and this embodiment does not specifically limit this.

[0070] In another alternative embodiment, see Figure 7 and Figure 8 Each sheath fixing assembly 40 includes a fixing flange 42 and a retractable member 43. In this embodiment, the fixing flange 42 is at least partially installed in the sheath channel 101 and cooperates with the sheath channel 101, for example, it can be set to an interference fit. Figure 20 The shape of the sheath tube channel 101 can match the outer contour of the fixing flange 42 to facilitate installation and improve connection stability. Figure 8 As shown, the fixed flange 42 has a central hole 421, the sheath tube 2000 passes through the central hole 421, the retractable member 43 is connected in the central hole 421 and sleeved on the sheath tube 2000, and the retractable member 43 holds the sheath tube 2000 tightly when in a retracted state, thereby preventing the sheath tube 2000 from moving and rotating axially.

[0071] Exemplarily, the retractable member 43 in this embodiment includes a support ring 431 and a plurality of movable pieces 432 connected to the support ring 431. The movable pieces 432 extend in the axial direction and can rotate around the connection with the support ring 431 within a set range. It can be understood that when the plurality of movable pieces 432 rotate and retract toward the axis direction of the support ring 431, they can hold the sheath tube 2000 tightly. On this basis, in this embodiment, the central hole 421 of the fixing flange 42 can be set to a shape that squeezes the retractable member 43 to retract it, or a component for squeezing the retractable member 43 to retract it can be set in the central hole 421. During the assembly process, the retractable member 43 can be first connected to the sheath tube 2000 and then inserted into the central hole 421, so that the retractable member 43 is squeezed and retracted to achieve fixation of the sheath tube 2000.

[0072] In an optional embodiment, the central hole 421 includes a tapered hole section, and the retractable member 43 is movably disposed in the tapered hole section of the central hole 421. The support ring 431 of the retractable member 43 is close to the large end of the tapered hole section, and the end of the movable piece 432 away from the support ring 431 is close to the small end of the tapered hole section. It should be noted that the large end of the tapered hole section refers to the end with a larger diameter, and the small end refers to the end with a smaller diameter. Therefore, when the retractable member 43 moves toward the small end, the movable piece 432 is squeezed by the inner wall of the tapered hole section and shrinks inward, thereby holding the sheath tube 2000 tightly, so that the sheath tube 2000 cannot move axially and cannot rotate.

[0073] Based on the above implementation, please continue to refer to Figure 8 The sheath fixing assembly 40 further includes an abutment member 44, which is also disposed in the central hole 421 and has an axial through hole. On this basis, the sheath 2000 passing through the central hole 421 is partially located in the retractable member 43 and partially located in the abutment member 44. On this basis, the abutment member 44 can press the retractable member 43 in the axial direction to cause the retractable member 43 to move toward the small end. Exemplarily, the abutment 44 can be configured to be screw-shaped, and the outer wall of the abutment 44 can be provided with an external thread, and the inner wall of the center hole 421 is correspondingly provided with an internal thread, and at least part of the external thread is located on the large end side of the tapered hole section. Thus, during the assembly process, the abutment 44 is threadedly connected in the center hole 421. When the abutment 44 moves to a set position in the center hole 421, the end of the abutment 44 abuts axially with the support ring 431 of the retractable member 43, and then a thrust is applied to the retractable member 43 when continuing to move, so that the retractable member 43 moves toward the small end of the tapered hole section, causing the movable sheet 432 to be squeezed and contracted, even if the retractable member 43 contracts and tightly embraces the sheath 2000. In summary, this embodiment prevents the sheath 2000 from moving relative to the shell 10 by combining the fixed flange 42, the retractable component 43 and the abutment 44, thereby improving the stability of the sheath 2000 and ensuring the stability of the pull wire 3000 during the use of the sheath bending handle 100.

[0074] Please continue reading Figure 1 , Figure 2 and Figure 3, Exemplarily, the driving assembly 30 includes a knob 31, a worm 32, and a worm gear 33 that are connected in sequence. The knob 31 is located outside the housing 10, and the worm 32 and the worm gear 33 are located inside the housing 10. A connecting boss is provided on one side of the knob 31 facing the housing 10, and a connecting hole is provided on the connecting boss. The central shaft portion of the worm 32 extends out of the housing 10 and extends into the connecting hole to be connected to the knob 31. An interference fit can be set between the central shaft and the connecting hole, or they can be connected by fasteners. In an alternative embodiment, the connecting boss is provided with a threaded hole in the radial direction. Thus, a screw or a bolt can be inserted from the threaded hole to abut or engage with the central shaft of the worm 32, thereby improving the reliability of the connection between the worm 32 and the knob 31.

[0075] Based on the above embodiment, as Figure 2 shown, the worm gear 33 is rotatably arranged in the housing 10. The two ends of the worm 32 are respectively rotatably connected to the side walls of the housing 10. The helical tooth portion of the worm 32 meshes with the worm gear 33. The worm gear 33 rotates under the drive of the worm 32. On this basis, the worm gear 33 is sleeved on the main shaft 21 of the wire winding and locking mechanism 20 and can drive the main shaft 21 and the wire winding wheel 22 to rotate. Thus, the main shaft 21, the wire winding wheel 22, and the worm gear 33 are coaxially arranged, with a compact structure, saving installation space, further reducing the overall volume of the sheath bending handle 100. Moreover, the driving mode of the worm gear 33 and the worm 32 has a self-locking function, ensuring the stability of the wire winding and locking mechanism 20 and the traction wire 3000.

[0076] Furthermore, in some embodiments of the present invention, the sheath bending handle 100 further includes a plurality of bearings 50. Exemplarily, please continue to refer to Figure 2 , the main shaft 21 and the worm 32 of the wire winding and locking mechanism 20 are respectively arranged in the housing 10 along a direction perpendicular to the axis of the sheath 2000. Both ends of each main shaft 21 are respectively connected with a bearing 50, and both ends of each worm 32 are also respectively connected with a bearing 50. Correspondingly, a plurality of mounting holes for mounting the bearings 50 are provided on the housing 10. In this embodiment, the stability of the main shaft 21 and the worm 32 is improved by providing the bearings 50, and the resistance during the rotation of the main shaft 21 and the worm 32 is reduced, thereby improving the use experience and bending efficiency of the sheath bending handle 100.

[0077] During the use of the sheath bending handle 100, the operator rotates the knob 31, driving the worm 32 to rotate. The worm 32 drives the worm gear 33 meshing with it to rotate. The worm gear 33 drives the main shaft 21 and the wire winding wheel 22 of the wire winding and locking mechanism 20 coaxial with it to rotate, and then pulls the traction wire 3000 connected to the wire winding wheel 22, causing the distal end of the sheath 2000 to bend. In this embodiment, the wire winding wheel 22 can accommodate and connect the traction wire 3000. It can be understood that the structure of the wire winding and locking mechanism 20 is different according to the different numbers of the matching traction wires 3000.

[0078] Exemplarily, in some embodiments of the present invention, please continue to refer to Figure 2 and Figure 3 , the winding locking mechanism 20 includes a main shaft 21, a winding wheel 22 and a wire pressing member 23. The main shaft 21 is in transmission connection with the driving assembly 30 and can rotate under the drive of the driving assembly 30. The winding wheel 22 is sleeved on the main shaft 21 and rotates with the main shaft 21. At least one winding groove 221 is circumferentially provided on the outer wheel wall of the winding wheel 22. The winding wheel 22 is provided with at least one group of intersecting and communicating wire passing holes 223 and wire locking holes 224 in a direction perpendicular to the axial direction. The part of the pulling wire 3000 extending from the sheath tube 2000 is wound around the winding groove 221, and a part of the pulling wire 3000 near the end extends into the wire passing hole 223; the wire pressing member 23 is arranged in the wire locking hole 224 and presses the pulling wire 3000.

[0079] On the basis of the above embodiment, please continue to refer to Figure 2 and Figure 3 , one winding groove 221 can be provided on the winding wheel 22, or multiple winding grooves 221 can be provided. The number of winding grooves 221 is set according to the number of pulling wires 3000. When one winding groove 221 is provided on the winding wheel 22, the winding wheel 22 is used for winding one pulling wire 3000; when two winding grooves 221 are provided on the winding wheel 22, the winding wheel 22 is used for winding two pulling wires 3000, and the two pulling wires 3000 are wound in the two winding grooves 221 in opposite directions respectively.

[0080] Further, along the axial direction of the winding wheel 22, the width of the winding groove 221 can be set according to actual needs. In a possible embodiment, the width of the winding groove 221 is greater than or equal to the outer diameter of the sheath tube 2000. Thus, as Figure 2 shown, the sheath tube 2000 passing through the housing 10 can pass through the winding groove 221 in a direction parallel to the tangential direction of the winding wheel 22, that is, a part of the sheath tube 2000 is located in the winding groove 221. Further, the outer wall of the sheath tube 2000 can be in contact with the bottom surface of the winding groove 221 or maintain a small distance, that is, the generatrix of the sheath tube 2000 is tangent or approximately tangent to the bottom surface of the groove; further, the bottom surface of the winding groove 221 can be set as an arc surface that coincides with the outer wall shape of the sheath tube 2000 to form a larger accommodating space, facilitating the contact between the sheath tube 2000 and the bottom surface of the groove or maintaining a small distance. Such a setting method can make the pulling wire 3000 extending from the sheath tube 2000 be as tangent or approximately tangent to the winding wheel 22 as possible when winding around the winding wheel 22, preventing the outer wall of the sheath tube 2000 from being scratched when the pulling wire 3000 is pulled.

[0081] In some embodiments of the present invention, one or more baffles may be provided on the winding wheel 22. The baffles are located at the notch of the winding groove 221 and are used to block the pulling wire 3000. Exemplarily, since the winding groove 221 is a recessed portion provided on the outer wheel wall of the winding wheel 22, along the axial direction of the winding wheel 22, the portions on both sides of the winding groove 221 are convex platforms relative to the winding groove 221. On this basis, the baffles can be integrally formed on the convex platforms on both sides of the winding groove 221, and the baffles extend toward the winding groove 221, so as to block part of the winding groove 221. When the winding wheel 22 rotates in the direction opposite to the winding direction of the pulling wire 3000, the pulling wire 3000 located in the winding groove 221 may become loose. In this embodiment, the setting of the baffles can reduce or avoid the possibility of the pulling wire 3000 falling off after becoming loose.

[0082] On the basis of the above embodiment, the wire pressing member 23 extends into the wire locking hole 224 to press the pulling wire 3000. One or more wire pressing members 23 may be provided. Exemplarily, the pressing method may be that the end of one wire pressing member 23 abuts against the inner wall of the hole to press the pulling wire 3000 between the wire pressing member 23 and the inner wall of the hole, or the ends of two wire pressing members 23 abut against each other to press the pulling wire 3000 between them; the wire passing hole 223 may be provided as a blind hole or a through hole, and the wire locking hole 224 may also be provided as a blind hole or a through hole. The wire passing hole 223 and the wire locking hole 224 may be arranged along the radial direction of the winding wheel 22, or may be arranged along a direction parallel to the tangent of the winding wheel 22. In addition, the wire passing hole 223 and the wire locking hole 224 extend inward from the outer wheel wall of the winding wheel 22. Exemplarily, the wire passing hole 223 and the wire locking hole 224 may be arranged inward from the winding groove 221, or may be arranged inward from other parts of the winding wheel 22. In this embodiment, the specific structures and positions of the wire passing hole 223 and the wire locking hole 224 are not limited, as long as the wire passing hole 223 is connected to the wire locking hole 224 and the wire pressing member 23 can press the pulling wire 3000.

[0083] In some embodiments of the present invention, please refer to Figures 9 to 13 , the wire passing hole 223 and the wire locking hole 224 respectively penetrate through the winding wheel 22 along the radial direction of the winding wheel 22 from the bottom of the winding groove 221, that is to say, the orifices of the wire passing hole 223 and the wire locking hole 224 are both located in the winding groove 221. The wire passing hole 223 and the wire locking hole 224 are both arranged along the radial direction, and the axis of the wire passing hole 223 intersects with the axis of the wire locking hole 224. An acute angle or a right angle may be formed between the two axes. In an optional embodiment, such as Figure 12As shown, the axis of the wire passing hole 223 is perpendicular to the axis of the wire locking hole 224. It can be understood that since the winding wheel 22 has a central hole 421 for cooperating with the main shaft 21, the wire passing hole 223 and the wire locking hole 224 penetrating through the winding wheel 22 both include two hole segments separated by the central hole 421. For the convenience of understanding, in this embodiment, the two hole segments of the wire passing hole 223 are uniformly described as the wire passing hole 223, and the two hole segments of the wire locking hole 224 are uniformly described as the wire locking hole 224.

[0084] Based on the above embodiment, please continue to refer to Figure 12 and Figure 13 , at least one set of intersecting and communicating first shaft holes 211 and second shaft holes 212 are provided through the main shaft 21 in the radial direction. In this embodiment, the first shaft hole 211 is coaxially arranged with the wire passing hole 223 and is located between the two hole segments of the wire passing hole 223, and the second shaft hole 212 is coaxially arranged with the wire locking hole 224 and is located between the two hole segments of the wire locking hole 224. On the basis that the axis of the wire passing hole 223 is perpendicular to the axis of the wire locking hole 224, the axis of the first shaft hole 211 intersects and is perpendicular to the axis of the second shaft hole 212. On this basis, the wire pressing member 23 for pressing the pulling wire 3000 cooperates with the wire locking hole 224 and the second shaft hole 212 respectively.

[0085] In some embodiments of the present invention, please refer to Figure 9 and Figure 10 , and in combination with referring to Figure 14 and Figure 15 , at least one set of wire pressing members 23 are provided, and the number of each set of wire pressing members 23 is two. It can be understood that the number of sets of the wire pressing members 23 and the number of sets of the above first shaft holes 211 and second shaft holes 212 are both set according to the number of the wire passing holes 223 or wire locking holes 224 on the winding wheel 22. When the winding wheel 22 cooperates with one pulling wire 3000 and there is one wire locking hole 224, one set of first shaft holes 211 and second shaft holes 212 are correspondingly provided, and one set of wire pressing members 23 are correspondingly provided; when the winding wheel 22 cooperates with two pulling wires 3000 and there are two wire locking holes 224, two sets of first shaft holes 211 and second shaft holes 212 are correspondingly provided, and two sets of wire pressing members 23 are correspondingly provided. According to the above embodiment, each set of two wire pressing members 23 are respectively inserted into the wire locking hole 224 and the second shaft hole 212 from both ends of the wire locking hole 224 and are abutted against each other to clamp the pulling wire 3000. Thus, in this embodiment, while the two wire pressing members 23 press the wire, they also play a role in connecting the main shaft 21 and the winding wheel 22, facilitating assembly, reducing the number of parts, and improving the structural compactness.

[0086] In an alternative embodiment, the wire pressing member 23 is provided as a stud. Correspondingly, the wire locking hole 224 can be provided as a through hole, and the inner wall of the second shaft hole 212 can be provided with threads. Thus, after the stud penetrates through the wire locking hole 224, it mates with the threads of the second shaft hole 212 until the end faces of the two opposite studs abut against each other and clamp the pulling wire 3000. Further, the end face of the wire pressing member 23 for pressing the pulling wire 3000 is provided with concave and convex stripes. Taking the wire pressing member 23 being provided as a stud as an example, the concave and convex stripes can be integrally formed on the end face of the stud. When the end faces of the two studs abut against each other, the fitting of the concave and convex stripes can increase the friction force, thereby further improving the pressing effect on the pulling wire 3000.

[0087] In the assembly process of the wire winding and locking mechanism 20 in this embodiment, the proximal part of the pulling wire 3000 can be first placed in the wire passing hole 223 and the first shaft hole 211, and then the two wire pressing members 23 are respectively inserted inward from the two outer orifices of the wire locking hole 224 until the ends of the two wire pressing members 23 abut against each other, pressing the part of the pulling wire 3000 located at the connection of the first shaft hole 211 and the second shaft hole 212. When the wire winding wheel 22 rotates in the winding direction of the pulling wire 3000, the pulling wire 3000 can be tightened, and further the distal end of the sheath 2000 is bent in the set direction. In summary, the arrangement of the wire passing hole 223, the wire locking hole 224 and the wire pressing member 23 in this embodiment improves the stability of the connection between the pulling wire 3000 and the wire winding wheel 22, which is more reliable than the way of only winding or using adhesive connection, can avoid interference between the proximal end of the pulling wire 3000 and other components such as the worm wheel 33 or the worm 32, and reduces the risk of disorder of the pulling wire 3000 inside the handle.

[0088] Further, since the rotation of the wire winding wheel 22 pulls the pulling wire 3000, and further drives the distal end of the sheath 2000 to bend, the bending degree of the sheath 2000 is related to the rotation angle of the wire winding wheel 22. In some embodiments of the present invention, as Figure 1 shown, the sheath bending handle 100 further includes a pointer 60. The pointer 60 can be coaxially arranged with the wire winding wheel 22, and corresponding scale marks can also be provided. Thus, the pointer 60 can be used to indicate the rotation angle of the wire winding wheel 22, and the operator can judge the bending degree of the sheath 2000 through the angle indicated by the pointer 60, which is beneficial for the operator to master the surgical situation. It can be understood that the number of pointers 60 is equal to the number of wire winding and locking mechanisms 20 in the sheath bending handle 100, that is, one pointer 60 is used to indicate the rotation angle of one wire winding wheel 22.

[0089] Based on the above embodiments, since the worm gear 33, the main shaft 21 and the winding wheel 22 rotate coaxially, the worm gear 33, the main shaft 21 and the winding wheel 22 rotate by the same angle. The pointer 60 can be connected to any one of the worm gear 33, the main shaft 21 and the winding wheel 22. In an alternative embodiment, as Figure 1 shown, each pointer 60 is connected to the end of a main shaft 21. Exemplarily, the end of the main shaft 21 is connected to the housing 10 through a bearing 50. The end face of the main shaft 21 can be exposed outside the housing 10, and the pointer 60 connected to the main shaft 21 is also located outside the housing 10, which is more convenient for the operator to observe. In this embodiment, the pointer 60 is perpendicular to the axis of the main shaft 21. A connecting portion is provided on the side of the pointer 60 facing the main shaft 21. The connection between the connecting portion and the main shaft 21 can be set as welding, snap connection or connection through fasteners. On this basis, scale lines are marked on the outer surface of the housing 10, and the pointer 60 is parallel to the surface with the marked scale lines, which improves the indication accuracy and is convenient for the operator to read. In addition, a transparent cover can be connected outside the housing 10. The transparent cover is buckled outside the pointer 60 and the scale lines to protect the pointer 60 and the scale lines from dust.

[0090] In some embodiments of the present invention, please refer to Figure 2 , Figure 3 and Figure 4 , the sheath bending handle 100 further includes a limiting mechanism 70. In this embodiment, the limiting mechanism 70 can be installed in the housing 10 and is used to limit at least one of the rotation range and the rotation direction of the winding wheel 22. The number of the limiting mechanisms 70 is the same as the number of the winding locking mechanisms 20. Exemplarily, when there is one winding locking mechanism 20, there is one corresponding limiting mechanism 70; when there are two winding locking mechanisms 20, there are two corresponding limiting mechanisms 70. In this embodiment, the limiting mechanism 70 can prevent the winding wheel 22 from rotating in a direction that causes the pulling wire 3000 to become loose, or can control the rotation range, so as to prevent the winding wheel 22 from rotating excessively and tearing the pulling wire 3000, and avoid the breaking of the pulling wire 3000.

[0091] Furthermore, each limiting mechanism 70 includes a rotating member 71 and at least one limiting plate 72. The limiting plate 72 can be provided on the housing 10, for example, integrally formed on the housing 10. The shape of the limiting plate 72 can be a rectangular plate shape, a sector plate shape or an irregular shape, and this embodiment does not make specific limitations on this. The rotating member 71 is connected to the winding locking mechanism 20 and can rotate with the winding locking mechanism 20. For example, it can be connected to the main shaft 21 or the winding wheel 22. In an alternative embodiment, as Figure 2As shown, the rotating member 71 is connected to the main shaft 21, and the connection method between the two can be integrally formed, welded, inserted, or connected by fasteners; the rotating member 71 can be set as a rotating plate or a rotating rod, and the shape of the rotating rod can be set as a cylindrical rod shape, a Z-shaped rod shape, an L-shaped rod shape, or an irregular shape, and this embodiment does not make specific limitations on this. Taking the shape of the rotating member 71 being set as a cylindrical rod shape as an example, the axis of the rotating member 71 is perpendicular to the axis of the main shaft 21, and the end of the rotating member 71 is used to abut against the limiting plate 72 to prevent rotation, thereby restricting the rotation of the main shaft 21 and the winding wheel 22.

[0092] On the basis of the above embodiment, the number of the limiting plates 72 is set according to the factors to be restricted by the limiting mechanism 70. Taking the number of the winding and locking mechanism 20 and the limiting mechanism 70 both being one as an example, the limiting mechanism 70 can include one rotating member 71 and two limiting plates 72. The two ends of the rotating member 71 respectively abut against the sides of the two limiting plates 72 in the initial state, so that the main shaft 21 and the winding wheel 22 can only rotate in the direction opposite to the abutting direction, achieving the purpose of restricting the rotation direction; when the rotating member 71 rotates to the set position, it abuts against the other side of the limiting plate 72, thereby restricting the continuous rotation of the main shaft 21 and the winding wheel 22, achieving the purpose of restricting the rotation range.

[0093] The sheath bending handle 100 proposed in this embodiment cooperates with the sheath 2000 that can bend in one or more directions. It can be understood that when there is one pulling wire 3000 of the sheath 2000, the pulling wire 3000 drives the distal end of the sheath 2000 to bend in one direction. At this time, the sheath bending handle 100 is a single-direction bending handle; when there are two pulling wires 3000 of the sheath 2000, the two pulling wires 3000 can drive the sheath 2000 to bend in two different directions. At this time, the sheath bending handle 100 is a two-direction bending handle; when the pulling wires 3000 of the sheath 2000 are set to three, the three pulling wires 3000 can drive the sheath 2000 to bend in three different directions. At this time, the sheath bending handle 100 is a three-direction bending handle. The three-direction bending method, the two-direction bending method, and the single-direction bending method will be described in turn through three embodiments below.

[0094] Embodiment 1

[0095] Please refer to Figures 1 to 15 , the sheath bending handle 100 proposed in this embodiment can adjust the sheath 2000 in three directions. That is to say, the sheath bending handle 100 proposed in this embodiment can cooperate with the three pulling wires 3000 of the sheath 2000, so that the distal end of the sheath 2000 bends in three different directions under the pulling of the three pulling wires 3000. As Figures 1 to 4As shown, the sheath bending handle 100 includes a housing 10, two sets of driving components 30, and two wire winding locking mechanisms 20. Each set of driving components 30 cooperates with one wire winding locking mechanism 20. The sheath 2000 is disposed in the housing 10. The two wire winding locking mechanisms 20 are arranged along the axial direction of the sheath 2000 in the housing 10. All three pulling wires 3000 extend from the pipe section of the sheath 2000 located in the housing 10 and cooperate with the two wire winding locking mechanisms 20.

[0096] In this embodiment, the two sets of driving components 30 are respectively a first driving component 301 and a second driving component 302. As Figure 2 shown, the first driving component 301 and the second driving component 302 can be installed in the housing 10 in opposite directions. Thus, the knob 31 of the first driving component 301 and the knob 31 of the second driving component 302 are respectively located on opposite sides of the housing 10. Such a setting method can avoid interference between the two knobs 31, and is beneficial to improving the compactness of the internal structure of the housing 10, making full use of the installation space in the housing 10, and reducing the overall volume of the sheath bending handle 100. Further, the structures of the first driving component 301 and the second driving component 302 can be the same. The specific structures of the housing 10, the first driving component 301, and the second driving component 302 refer to the above embodiment and will not be elaborated here.

[0097] Please continue to refer to Figure 2 and Figure 3 , exemplarily, the two wire winding locking mechanisms 20 are respectively a first wire winding locking mechanism 201 and a second wire winding locking mechanism 202, and the three pulling wires 3000 are respectively a first pulling wire 3001, a second pulling wire 3002, and a third pulling wire 3003. The first wire winding locking mechanism 201 cooperates with the first pulling wire 3001, and the second wire winding locking mechanism 202 cooperates with the second pulling wire 3002 and the third pulling wire 3003 at the same time. The first driving component 301 drives the first wire winding wheel 2201 of the first wire winding locking mechanism 201 to rotate, thereby pulling the first pulling wire 3001. The second driving component 302 drives the second wire winding wheel 2202 of the second wire winding locking mechanism 202 to rotate, and thereby pulls the second pulling wire 3002 or the third pulling wire 3003 through different rotation directions. Thus, the sheath bending handle 100 proposed in this embodiment is convenient for the operator to operate, and solves the problem of cumbersome operation of the sheath bending handle 100.

[0098] Please continue to refer to Figure 2 and Figure 3 , and in combination with referring to Figure 9 and Figure 10, in this embodiment, the first wire winding and locking mechanism 201 includes a first main shaft 2101 and a first wire winding wheel 2201, and the second wire winding and locking mechanism 202 includes a second main shaft 2102 and a second wire winding wheel 2202. A wire winding groove 221, a set of wire passing holes 223 and a wire locking hole 224 are provided on the first wire winding wheel 2201, and a set of first shaft holes 211 and a second shaft hole 212 are provided on the first main shaft 2101; Two wire winding grooves 221, two sets of wire passing holes 223 and a wire locking hole 224 are provided on the second wire winding wheel 2202, and two sets of first shaft holes 211 and a second shaft hole 212 are provided on the second main shaft 2102. In addition, as Figure 1 shown, pointers 60 are respectively connected to the end parts of the first main shaft 2101 and the second main shaft 2102. The two pointers 60 are used to respectively display the rotation angles of the first main shaft 2101 and the second main shaft 2102. Correspondingly, two sets of scale lines and two transparent covers that cooperate with the two pointers 60 are provided on the housing 10.

[0099] Please continue to refer to Figure 9 and Figure 15 , a first wire winding groove 2211 is circumferentially provided along the outer wheel wall of the first wire winding wheel 2201. A set of vertically connected wire passing holes 223 and a wire locking hole 224 are radially penetrated through the first wire winding wheel 2201. After the first pulling wire 3001 extends out of the sheath tube 2000, it is first wound in the first wire winding groove 2211. The part of the first pulling wire 3001 close to the proximal end extends into the wire passing hole 223 and the first shaft hole 211 and is clamped by two pulling members. Thus, when the first wire winding wheel 2201 rotates in the winding direction of the first pulling wire 3001, the first pulling wire 3001 can be tightened, and further the distal end of the sheath tube 2000 can be bent in the first direction.

[0100] In some embodiments of the present invention, as Figure 2 shown, the part of the sheath tube 2000 penetrating through the housing 10 is located in the first wire winding groove 2211. The axis of the sheath tube 2000 is parallel to the tangential direction of the first wire winding wheel 2201. The first pulling wire 3001 extends out from the side of the sheath tube 2000 facing the first wire winding groove 2211, extends along the tangential direction and is wound in the first wire winding groove 2211 in the counterclockwise direction. Further, the groove bottom surface of the first wire winding groove 2211 is set as an arc surface, and the groove bottom surface fits the outer side wall shape of the sheath tube 2000. Thus, the first pulling wire 3001 can be kept tangent or approximately tangent to the first wire winding wheel 2201 as much as possible, and it can prevent the outer wall of the sheath tube 2000 from being scratched when the first pulling wire 3001 is pulled.

[0101] Please refer to Figure 10The outer wheel wall of the second winding wheel 2202 is circumferentially provided with a second winding groove 2212 and a third winding groove 2213, the second winding groove 2212 and the third winding groove 2213 are arranged axially, and the second winding wheel 2202 is radially penetrated with two groups of vertically connected wire holes 223 and wire locking holes 224, one group of which is located in the second winding groove 2212, and the other group is located in the third winding groove 2213. Accordingly, the main shaft 21 matched with the second winding wheel 2202 Two groups of vertically connected first axial holes 211 and second axial holes 212 are radially penetrated. The second pulling wire 3002 is extended from the sheath tube 2000, wound in the second winding groove 2212, and extends into the corresponding wire hole 223 and the first axial hole 211 to be clamped by two pulling components; the third pulling wire 3003 is extended from the sheath tube 2000, wound in the third winding groove 2213, and extends into the corresponding wire hole 223 and the first axial hole 211 to be clamped by two pulling components. In this embodiment, the winding directions of the second pulling wire 3002 and the third pulling wire 3003 are opposite. Taking the second pulling wire 3002 being wound in a clockwise direction and the third pulling wire 3003 being wound in a counterclockwise direction as an example, when the second winding wheel 2202 rotates in a clockwise direction, the second pulling wire 3002 can be pulled, thereby causing the distal end of the sheath 2000 to bend in the second direction. When the second winding wheel 2202 rotates in a counterclockwise direction, the third pulling wire 3003 can be pulled, thereby causing the distal end of the sheath 2000 to bend in a third direction opposite to the second direction.

[0102] On the basis of the above embodiment, the sheath 2000 can be partially located in the second winding groove 2212 or the third winding groove 2213, that is, one of the second winding groove 2212 and the third winding groove 2213 is flush with the first winding groove 2211, thereby ensuring that the sheath 2000 is passed along a straight line. Furthermore, the bottom surface of the second winding groove 2212 or the third winding groove 2213 for the sheath 2000 to pass through is set to an arc surface, thereby ensuring that at least one of the second traction wire 3002 and the third traction wire 3003 is kept as tangent or approximately tangent to the second winding wheel 2202 as much as possible, thereby reducing or avoiding scratches on the outer wall of the sheath 2000.

[0103] Further, in some embodiments of the present invention, Figure 2 and Figure 10As shown, a sheath tube avoidance groove 222 is further provided on the outer wheel wall of the second winding wheel 2202. Along the axial direction of the second winding wheel 2202, the sheath tube avoidance groove 222 is located between the second winding groove 2212 and the third winding groove 2213 and is flush with the first winding groove 2211. The sheath tube avoidance groove 222 can be provided in a ring shape on the outer wheel wall of the second winding wheel 2202, or can be provided only on the part of the second winding wheel 2202 facing the sheath tube 2000. In this embodiment, the shape of the sheath tube avoidance groove 222 is not specifically limited. The sheath tube avoidance groove 222 can accommodate a partial pipe section of the sheath tube 2000, and the groove bottom surface of the sheath tube avoidance groove 222 can also be in contact with the side wall of the sheath tube 2000. Further, the groove bottom surface of the sheath tube avoidance groove 222 can be set as an arc surface and coincide with the outer side wall shape of the sheath tube 2000, so that the second pulling wire 3002 and the third pulling wire 3003 are as close as possible to the second winding wheel 2202, reducing or avoiding scratching the outer wall of the sheath tube 2000.

[0104] Based on the above embodiments, as Figure 2 shown, the axis of the sheath tube 2000 is parallel to the tangential direction of the second winding wheel 2202. The second pulling wire 3002 extends out from the side of the sheath tube 2000 facing the top cover 11, extends obliquely upward, and is wound around the second winding groove 2212 in the clockwise direction. The third pulling wire 3003 extends out from the side of the sheath tube 2000 facing the bottom case 12, extends obliquely downward, and is wound around the third winding groove 2213 in the counterclockwise direction. Thus, on the basis of ensuring that the second pulling wire 3002 and the third pulling wire 3003 are respectively connected to the second winding wheel 2202, the interference and winding between the second pulling wire 3002 and the third pulling wire 3003 can be avoided.

[0105] Further, in some embodiments of the present invention, as Figure 2 and Figure 3As shown, the sheath bending handle 100 further includes a wire blocking rod 80. It can be understood that since the second pulling wire 3002 extends from the sheath 2000 and is wound around the second winding groove 2212 in the clockwise direction, when the second winding wheel 2202 rotates in the clockwise direction, the part of the second pulling wire 3002 close to the sheath 2000 has a tendency to move away from the sheath 2000, and thus it is likely to scratch the outer wall of the sheath 2000. In this embodiment, the wire blocking rod 80 is arranged at the angle between the sheath 2000 and the second winding wheel 2202, and the wire blocking rod 80 abuts against the second pulling wire 3002, so that the second pulling wire 3002 is blocked and turns before being wound into the second winding groove 2212. Thus, when the second pulling wire 3002 is pulled, the wire blocking rod 80 can prevent the second pulling wire 3002 from moving away from the above-mentioned angle, and make the second pulling wire 3002 move along the direction close to the above-mentioned angle first, avoiding the second pulling wire 3002 from scratching the outer wall of the sheath 2000. In this embodiment, the wire blocking rod 80 can be connected to the housing 10 by means of clamping, plugging or fastener connection, or can be integrally formed in the housing 10.

[0106] Further, please refer to Figures 2 to 4 , in this embodiment, the number of the limiting mechanisms 70 is two. The two limiting mechanisms 70 are respectively a first limiting mechanism 701 and a second limiting mechanism 702. The first limiting mechanism 701 cooperates with the first winding locking mechanism 201. The first limiting mechanism 701 includes a first rotating rod 711 and two limiting plates 72. According to the above-mentioned embodiment, the first pulling wire 3001 is wound around the first winding wheel 2201 in the counterclockwise direction. In this embodiment, the first rotating rod 711 is vertically connected to the first main shaft 2101. The two ends of the first rotating rod 711 abut against the two limiting plates 72 respectively in the initial state, so that the first rotating rod 711 cannot rotate in the clockwise direction and can only rotate counterclockwise to pull the first pulling wire 3001, which can avoid the operator from turning the knob 31 in the wrong direction, and thus avoid the first pulling wire 3001 from loosening and falling off; The second limiting mechanism 702 cooperates with the second winding locking mechanism 202. The second limiting mechanism 702 includes a second rotating rod 712 and a limiting plate 72. According to the above-mentioned embodiment, both the second pulling wire 3002 and the third pulling wire 3003 are wound around the second winding wheel 2202. In this embodiment, the second rotating rod 712 is vertically connected to the second main shaft 2102. One end of the second rotating rod 712 abuts against the limiting plate 72 after rotating a certain angle and cannot continue to rotate, thereby restricting the rotation range of the second winding wheel 2202, which can avoid the operator from over-twisting the knob 31, and thus avoid the second pulling wire 3002 from loosening and falling off, the third pulling wire 3003 from being torn and broken, or avoid the second pulling wire 3002 from being torn and broken and the third pulling wire 3003 from loosening and falling off.

[0107] Embodiment 2

[0108] Please refer to Figure 16 As shown in Figure 16 , the sheath bending handle 100 proposed in this embodiment can adjust the sheath 2000 in two directions. That is to say, the sheath bending handle 100 proposed in this embodiment can cooperate with the two pulling lines 3000 of the sheath 2000, so that the distal end of the sheath 2000 bends in two different directions under the pulling of the two pulling lines 3000. In this embodiment, each set of driving components 30 cooperates with a wire winding and locking mechanism 20. It can be understood that when the driving component 30 is set to one group, the wire winding and locking mechanism 20 is set to one and cooperates with the two pulling lines 3000 at the same time; when the driving component 30 is set to two groups, the wire winding and locking mechanism 20 is set to two, and each wire winding and locking mechanism 20 cooperates with one pulling line 3000. The sheath bending handle 100 includes a housing 10. The sheath 2000 is inserted through the housing 10. Both pulling lines 3000 extend from the pipe section of the sheath 2000 located in the housing 10 and cooperate with one or two wire winding and locking mechanisms 20.

[0109] When the two wire winding and locking mechanisms 20 cooperate with the two pulling lines 3000 respectively, the structure of the driving component 30 can refer to the structure of the first driving component 301 in Embodiment 1, and the structure of the wire winding and locking mechanism 20 can refer to the structure of the first wire winding and locking mechanism 201 in Embodiment 1. In this embodiment, the two wire winding and locking mechanisms 20 are arranged along the axial direction of the sheath 2000. The two pulling lines 3000 extend from different parts of the sheath 2000 and cooperate with the two wire winding wheels 22 respectively. The cooperation mode of the two pulling lines 3000 and the wire winding wheels 22 can refer to the cooperation mode of the first pulling line 3001 and the first wire winding wheel 2201 in Embodiment 1, which will not be elaborated here. This embodiment uses two sets of driving components 30 and two wire winding and locking mechanisms 20 to control the two pulling lines 3000, which is convenient for the operator to operate and solves the problem of cumbersome operation of the sheath bending handle 100.

[0110] Furthermore, the sheath bending handle 100 proposed in this embodiment further includes a limiting mechanism 70. The number of the limiting mechanisms 70 is two. The two limiting mechanisms 70 cooperate with the two wire winding and locking mechanisms 20 respectively. The specific structure of the limiting mechanism 70 can refer to the specific structure of the first limiting mechanism 701 in Embodiment 1, which will not be elaborated here. In this embodiment, the limiting mechanism 70 is used to prevent the operator from turning the knob 31 in the wrong direction, thereby avoiding the loosening and falling off of the corresponding pulling line 3000.

[0111] When a wire winding and locking mechanism 20 cooperates with two pulling wires 3000 simultaneously, the structure of the driving assembly 30 can refer to the structure of the second driving assembly 302 in the first embodiment, and the structure of the wire winding and locking mechanism 20 can refer to the structure of the second wire winding and locking mechanism 202 in the first embodiment. In this embodiment, the two pulling wires 3000 extend out of the sheath tube 2000 in opposite directions respectively and are wound around two wire grooves 221 of the wire winding and locking mechanism 20 respectively. The wire winding wheel 22 pulls the two pulling wires 3000 by different rotation directions. The cooperation mode between the two pulling wires 3000 and the wire winding wheel 22 can refer to the cooperation mode between the second pulling wire 3002 and the third pulling wire 3003 and the second wire winding wheel 2202 in the first embodiment, which will not be elaborated here. This embodiment uses a set of driving assemblies 30 and a wire winding and locking mechanism 20 to control two pulling wires 3000 simultaneously, which not only improves the structural compactness of the sheath tube bending handle 100, but also facilitates the operation of the operator, and solves the problem of cumbersome operation of the sheath tube bending handle 100.

[0112] Furthermore, the sheath tube bending handle 100 proposed in this embodiment further includes a wire blocking rod 80 and a limiting mechanism 70. The specific structure of the wire blocking rod 80 can refer to the specific structure of the wire blocking rod 80 in the first embodiment, which will not be elaborated here. In this embodiment, the wire blocking rod 80 is used to cooperate with the pulling wire 3000 wound around the wire winding wheel 22 clockwise to prevent the pulling wire 3000 from scratching the outer wall of the sheath tube 2000. The specific structure of the limiting mechanism 70 can refer to the specific structure of the second limiting mechanism 702 in the first embodiment, which will not be elaborated here. In this embodiment, the limiting mechanism 70 is used to prevent one of the two pulling wires 3000 from loosening and falling off and the other from being torn and broken due to excessive rotation of the wire winding wheel 22.

[0113] Embodiment Three

[0114] Please refer to Figures 17 to 20 , the sheath tube bending handle 100 proposed in this embodiment can adjust the sheath tube 2000 in one direction. That is to say, the sheath tube bending handle 100 proposed in this embodiment can cooperate with one pulling wire 3000 of the sheath tube 2000 to make the distal end of the sheath tube 2000 bend in the set direction under the pulling of the pulling wire 3000. As Figure 18 shown, in this embodiment, the sheath tube bending handle 100 includes a housing 10, a set of driving assemblies 30 and a wire winding and locking mechanism 20. The sheath tube 2000 is arranged in the housing 10, and the pulling wire 3000 extends out of the tube section of the sheath tube 2000 located in the housing 10 and cooperates with the wire winding and locking mechanism 20.

[0115] The structure of the drive assembly 30 in this embodiment can refer to the structure of the first drive assembly 301 in the first embodiment, the structure of the winding locking mechanism 20 can refer to the structure of the first winding locking mechanism 201 in the first embodiment, and the matching mode of the pulling wire 3000 and the winding wheel 22 can refer to the matching mode of the first pulling wire 3001 and the first winding wheel 2201 in the first embodiment, which will not be repeated here. This embodiment uses a set of drive assemblies 30 and a winding locking mechanism 20 to control the pulling wire 3000, which is convenient for the operator to operate and solves the problem of cumbersome operation of the sheath bending handle 100.

[0116] Furthermore, if Figure 18 and Figure 19 As shown, the sheath bending handle 100 proposed in this embodiment also includes a limiting mechanism 70, which cooperates with the winding locking mechanism 20. The specific structure of the limiting mechanism 70 can refer to the specific structure of the first limiting mechanism 701 in the first embodiment, and will not be repeated here. In this embodiment, the limiting mechanism 70 is used to prevent the operator from turning the knob 31 in the wrong direction, thereby preventing the pulling wire 3000 from loosening and falling off. Further, as Figure 20 As shown, in some embodiments of the present invention, the sheath bending adjustment handle 100 may further include a gear set 90, which is disposed in the housing 10 and is respectively connected to the knob 31 and the worm 32 for transmission. Thus, the gear set 90 can increase the transmission ratio and improve the rotation efficiency of the worm gear 33 when the operator turns the knob 31.

[0117] See also Figure 21 The embodiment of the second aspect of the present invention proposes a delivery device 1000, which can be used in interventional treatment to deliver implants such as artificial valves, stents, valve clips 4000, etc. The delivery device 1000 includes at least one sheath tube 2000 and at least one sheath tube bending handle 100 proposed according to any of the above embodiments, and the portion of the sheath tube 2000 near the proximal end is inserted into the sheath tube bending handle 100. In this embodiment, the sheath tube 2000 can be a hollow sheath tube 2000 such as an adjustable bending sheath tube 2000, a shaping sheath tube 2000, etc., which can be bent or manipulated at the distal end. The sheath tube 2000 is straight or approximately straight when not subjected to a bending force. For example, the sheath tube 2000 is provided with an adjustable bending tube section at a portion near the distal end, and the traction wire 3000 is connected to the adjustable bending tube section. The sheath tube bending handle 100 can bend the distal end of the sheath tube 2000 by pulling the traction wire.

[0118] Exemplarily, the delivery device 1000 includes a primary sheath 2000 and a secondary sheath 2000. The secondary sheath 2000 can be inserted into the primary sheath 2000. An implant can be connected to the distal end of the secondary sheath 2000. The primary sheath 2000 is provided with a pulling wire 3000. A portion of the primary sheath 2000 near the proximal end is inserted into a sheath bending handle 100. The distal end of the primary sheath 2000 can be bent in one direction under the control of the sheath bending handle 100. The secondary sheath 2000 is provided with three pulling wires 3000. A portion of the secondary sheath 2000 near the proximal end is inserted into another sheath bending handle 100. The distal end of the secondary sheath 2000 can be bent in three directions under the control of the sheath bending handle 100, so as to deliver the implant to a set position in the patient's body. In this embodiment, the number of sheaths 2000 and sheath bending handles 100 is not specifically limited and can be set according to actual situations. The delivery device 1000 proposed in this embodiment has the same advantages as the sheath bending handle 100 proposed in the above embodiment and will not be elaborated here.

[0119] Please refer to Figure 22 , an embodiment of the third aspect of the present invention proposes a valve repair system 5000. The valve repair system 5000 includes a valve clip 4000 and the delivery device 1000 proposed according to the embodiment of the second aspect above. The delivery device 1000 is used to deliver the valve clip 4000. The distal end of the sheath 2000 is detachably connected to the valve clip 4000. Exemplarily, the delivery device 1000 includes a plurality of sheaths 2000 and a plurality of sheath bending handles 100. Each sheath bending handle 100 cooperates with a sheath 2000 and is used to control the distal end of the corresponding sheath 2000 to bend in a set direction during the delivery of the valve clip 4000, so as to deliver the valve clip 4000 to a set position. In addition, the valve repair system 5000 further includes a driving member for controlling the valve clip 4000. The driving member is inserted into the sheath 2000 and is detachably connected to the valve clip 4000. This embodiment is not specifically limited in this regard. The valve repair system 5000 proposed in this embodiment has the same advantages as the sheath bending handle 100 and the delivery device 1000 proposed in the above embodiment and will not be elaborated here.

[0120] In an alternative embodiment, the valve repair system 5000 includes a valve clip 4000, a primary sheath, a secondary sheath, a tertiary sheath, and a delivery device 1000. The delivery device 1000 includes a first sheath bending handle and a second sheath bending handle. Among them, the structure of the first sheath bending handle 100 can refer to the structure of the sheath bending handle 100 proposed in Embodiment 3 of the first aspect of the embodiments, and is used for one-way bending of the primary sheath. The structure of the second sheath bending handle can refer to the structure of the sheath bending handle 100 proposed in Embodiment 1 of the first aspect of the embodiments, and is used for three-way bending of the secondary sheath. The distal end of the tertiary sheath is detachably connected to the valve clip. On this basis, the secondary sheath is inserted through the primary sheath and exits from the distal end, and the tertiary sheath is inserted through the secondary sheath and exits from the distal end. During the operation of the valve repair system 5000, the bending of the primary sheath drives the secondary sheath and the tertiary sheath to bend simultaneously, and the bending of the secondary sheath drives the tertiary sheath to bend, thereby driving the valve clip 4000 to reach the set position, and can drive its fine adjustment to adjust the orientation during the process of the valve clip 4000 clamping the valve until the clamping is completed.

[0121] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A sheath tube bending adjustment handle, characterized in that, The sheath bending handle is used to pull the pulling wire of the sheath so that the distal end of the sheath bends in a set direction. The sheath bending handle includes at least one set of driving components and at least one wire winding and locking mechanism. The wire winding and locking mechanism includes: A main shaft, which is in transmission connection with the driving component; A wire winding wheel, which is sleeved on the main shaft. At least one wire winding groove is annularly arranged along the circumferential direction of the outer wheel wall of the wire winding wheel. The wire winding wheel is provided with at least one set of intersecting and communicating wire passing holes and wire locking holes in a direction perpendicular to the axial direction. The part of the pulling wire extending from the sheath is wound around the wire winding groove, and a part of the wire segment near the end of the pulling wire extends into the wire passing hole; A wire pressing member, which is arranged in the wire locking hole and cooperates with the wire locking hole to press the pulling wire.

2. The sheath tube bending adjustment handle according to claim 1, characterized in that, Along the axial direction of the wire winding wheel, the width of the wire winding groove is greater than or equal to the outer diameter of the sheath to accommodate a part of the tube segment of the sheath, and the bottom surface of the wire winding groove is in contact with and / or conforms to the side wall of the sheath.

3. The sheath tube bending adjustment handle according to claim 1, wherein, The outer wheel wall of the wire winding wheel is also provided with a sheath avoiding groove. Along the axial direction of the wire winding wheel, the width of the sheath avoiding groove is greater than or equal to the outer diameter of the sheath to accommodate a part of the tube segment of the sheath, and the bottom surface of the sheath avoiding groove is in contact with and / or conforms to the side wall of the sheath.

4. The sheath tube bending adjustment handle according to claim 3, wherein, There are two wire winding grooves, and along the axial direction of the wire winding wheel, the two wire winding grooves are respectively located on both sides of the sheath avoiding groove.

5. The sheath tube bending adjustment handle according to claim 1, characterized in that, The wire passing hole and the wire locking hole respectively penetrate the wire winding wheel along the radial direction of the wire winding wheel from the bottom of the wire winding groove.

6. The sheath tube bending adjustment handle according to claim 1 or 5, characterized in that The axis of the wire locking hole is perpendicular to the axis of the wire passing hole.

7. The sheath bending adjustment handle according to claim 5, wherein, There are at least one set of wire pressing members. The number of each set of wire pressing members is two. The two wire pressing members are respectively inserted into the wire locking hole from both ends of the wire locking hole and are abutted against each other to clamp the pulling wire.

8. The sheath tube bending adjustment handle according to claim 7, wherein, At least one set of intersecting and communicating first shaft holes and second shaft holes are radially penetrated through the main shaft. The first shaft hole is coaxially arranged with the wire passing hole, the second shaft hole is coaxially arranged with the wire locking hole, and the inner wall of the second shaft hole is provided with threads.

9. The sheath tube bending adjustment handle according to claim 1 or 8, characterized in that, The wire pressing member is set as a stud, and / or the end surface of the wire pressing member for pressing the pulling wire is provided with concave and convex stripes.

10. The sheath tube bending adjustment handle according to claim 1, characterized in that, A baffle is also arranged on the wire winding wheel, and the baffle is located at the notch of the wire winding groove to block the pulling wire.

11. The sheath tube bending adjustment handle according to claim 1, wherein, The driving component includes a knob, a worm and a worm gear connected in sequence. The worm gear is connected with the main shaft. The sheath bending handle also includes a housing and a sheath fixing component and a limiting mechanism arranged in the housing. The sheath fixing component is used to fix the sheath, and the limiting mechanism is used to limit the rotation of the wire winding wheel within a set range and / or in a set direction.

12. A conveying device, characterized in that, It includes at least one sheath and the sheath bending handle according to any one of claims 1 to 11, and the sheath is penetrated through the sheath bending handle.

13. A valve repair system, characterized in that, It includes a valve clip and the conveying device according to claim 12. The conveying device is used to convey the valve clip, and the distal end of the sheath is detachably connected to the valve clip.

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