Sheath bending handle, delivery device and valve repair system

Abstract

The present invention relates to a sheath bending handle, a conveying device and a valve repair system. The sheath bending handle includes a shell, at least one winding locking mechanism and at least one set of drive components. The shell is provided with a sheath channel for the sheath portion to pass through the shell. The winding locking mechanism is arranged in the shell. The winding locking mechanism includes a main shaft and a winding wheel. The winding wheel is used to receive and connect the pull wire of the sheath. When the winding wheel rotates in a set direction, it can pull the pull wire so that the distal end of the sheath is bent in the set direction. Each set of drive components cooperates with a winding locking mechanism. The drive component includes a knob, a worm and a worm wheel connected in sequence. The worm wheel is connected to the main shaft to drive the winding wheel to rotate. The sheath bending handle proposed by the present invention is not only compact in structure and easy to operate, but also can ensure the stability of the pull wire, thereby solving the problem of cumbersome operation of the sheath bending handle.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular 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 with an increasingly wide range of applications. It usually involves introducing a sheath into the patient's body under the guidance of medical imaging equipment, and establishing a pathway through the sheath to deliver implants such as drugs or devices. For example, when used in the field of valve repair, the distal end of the sheath can be connected to and deliver a valve clip, 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 smoothly and to ensure that the implant can reach the accurate set position, it is usually necessary to make the tube section near the distal end of the sheath into a structure that can be bent independently, and set a pull wire. The distal end of the pull wire is connected to the bendable part of the sheath, and the proximal end of the pull wire is pulled by the operator to drive the distal end of the sheath to bend.

[0004] The sheath bending handle in the related technology usually needs to be provided with a mechanism for pulling the traction wire and a mechanism for locking the traction wire. Therefore, when the sheath is bent, the traction wire is first unlocked and then pulled. When the distal end of the sheath needs to be maintained in a certain bending position, the traction wire needs to be locked to prevent the traction wire from being withdrawn by the pulling force of the sheath, causing the sheath to rebound. Such a sheath bending handle is cumbersome to operate and easily affects the surgical effect. Summary of the Invention

[0005] The purpose of the present invention is to at least solve the problem of cumbersome operation of the sheath bending handle. This purpose is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides a sheath bending handle, the sheath bending handle comprising:

[0007] a housing, wherein the housing is provided with a sheath tube channel for allowing the sheath tube portion to pass through the housing;

[0008] at least one wire winding locking mechanism, the wire winding locking mechanism being disposed within the housing, the wire winding locking mechanism comprising a main shaft and a winding wheel, the winding wheel being used to receive and connect a pull wire of the sheath tube, the winding wheel being capable of pulling the pull wire when rotating in a set direction, so as to cause the distal end of the sheath tube to bend in the set direction;

[0009] At least one set of drive components, each set of drive components cooperates with one of the winding locking mechanisms, the drive components include a knob, a worm and a worm wheel connected in sequence, the worm wheel is connected to the main shaft to drive the winding wheel to rotate.

[0010] The sheath bending adjustment handle proposed in the embodiment of the present invention adopts a worm gear mechanism to drive the winding wheel, and utilizes the restraining function of the winding wheel on the traction line combined with the self-locking function of the worm gear mechanism, so that the operator only needs to rotate a knob to ensure that the traction line is tightened and will not retreat, and can be further tightened as the winding wheel rotates, thereby driving the sheath to bend in a set direction. Therefore, the sheath bending adjustment handle proposed in the embodiment of the present invention is not only compact in structure and easy to operate, but also can ensure the stability of the traction line, solving the problem of cumbersome operation of the sheath bending adjustment handle.

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

[0012] In some embodiments of the present invention, the sheath bending handle further includes at least one set of sheath fixing components, which are connected to the housing and hold the sheath tightly to prevent the sheath from moving or rotating.

[0013] In some embodiments of the present invention, the sheath fixing assembly includes two oppositely arranged pressure rings, which are buckled and connected to hold the sheath tightly.

[0014] In some embodiments of the present invention, the sheath fixing assembly includes a fixed flange, a retractable component and an abutment. The fixed flange cooperates with the sheath channel, the retractable component and the abutment are arranged in the center hole of the fixed flange, the retractable component is sleeved on the sheath, and the abutment abuts against the retractable component so that the retractable component contracts and holds the sheath tightly.

[0015] In some embodiments of the present invention, the outer wheel wall of the winding wheel is provided with at least one winding groove along the circumferential ring, and the winding wheel is provided with at least one group of intersecting and connected wire holes and wire locking holes along the direction perpendicular to the axial direction. After the pulling wire extends out of the sheath, part of the pulling wire is wound around the winding groove, and the part of the pulling wire close to the end is arranged in the wire hole. The winding locking mechanism also includes a wire pressing component, which is arranged in the wire locking hole and presses the pulling wire.

[0016] In some embodiments of the present invention, the winding groove can accommodate a partial section of the sheath tube, and the bottom surface of the winding groove is in contact with and / or has a shape matching the side wall of the sheath tube.

[0017] In some embodiments of the present invention, at least one of the winding wheels is provided with two winding grooves, and the two pulling wires arranged opposite to each other in the sheath can be wound in the two winding grooves in opposite directions respectively. The winding wheel is configured to pull one of the pulling wires by rotating clockwise and pull the other pulling wire by rotating counterclockwise.

[0018] In some embodiments of the present invention, the outer wheel wall of the winding wheel is further provided with a sheath avoidance groove. Along the axial direction of the winding wheel, the sheath avoidance groove is located between the two winding grooves and can accommodate a partial section of the sheath tube. The bottom surface of the sheath avoidance groove is in contact with the side wall of the sheath tube and / or its shape is consistent with that of the sheath tube.

[0019] In some embodiments of the present invention, the sheath bending handle also includes a wire blocking rod, which is arranged at the angle between the sheath and the winding wheel. The wire blocking rod abuts against the traction wire wound in a clockwise direction, and is used to prevent the traction wire from moving in a direction away from the angle when the traction wire is pulled.

[0020] In some embodiments of the present invention, the sheath bending adjustment handle further includes a plurality of bearings, and both ends of the main shaft and both ends of the worm are respectively connected to the housing through the bearings.

[0021] In some embodiments of the present invention, the sheath bending handle further includes at least one limiting mechanism, which is installed in the housing and is used to limit the winding wheel from rotating within a set range and / or in a set direction.

[0022] In some embodiments of the present invention, the limiting mechanism includes a rotating member and at least one limiting plate, the rotating member is vertically connected to the main shaft, and an end of the rotating member extends toward the limiting plate and can abut against the limiting plate.

[0023] In some embodiments of the present invention, the sheath bending handle further includes at least one pointer for indicating a rotation angle, and the pointer is disposed outside the housing and connected to the end of the main shaft.

[0024] In some embodiments of the present invention, the sheath bending adjustment handle further includes a gear set, which is disposed in the housing and is respectively connected to the knob and the worm gear.

[0025] In some embodiments of the present invention, the sheath bending handle includes two winding locking mechanisms and two groups of drive assemblies, each group of drive assemblies cooperates with one winding locking mechanism, and the two knobs of the two groups of drive assemblies are respectively located on both sides of the shell.

[0026] 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 near the proximal end is inserted into the sheath bending handle.

[0027] The delivery device proposed in the present invention has the same advantages as the above-mentioned sheath bending handle, which will not be described in detail here.

[0028] A third aspect of the present invention provides a valve repair system, which includes a valve clipper and a delivery device according to the above embodiment, wherein the delivery device is used to deliver the valve clipper, and the distal end of the sheath is detachably connected to the valve clipper.

[0029] 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

[0030] 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 making any creative efforts.

[0031] Figure 1 This is a schematic structural diagram of the sheath bending handle according to the first embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the partial structure of the sheath bending handle according to the first embodiment of the present invention;

[0033] Figure 3 This is an exploded view of the structure of the sheath bending handle according to the first embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the partial structure of the sheath bending handle including the top cover according to the first embodiment of the present invention;

[0035] Figure 5 This is a structural schematic diagram of a sheath tube fixing assembly in a sheath tube bending adjustment handle according to an embodiment of the present invention;

[0036] Figure 6 for Figure 5 A cross-sectional view of the sheath fixation assembly shown;

[0037] Figure 7 This is another structural schematic diagram of the sheath tube fixing assembly in the sheath tube bending adjustment handle according to the first embodiment of the present invention;

[0038] Figure 8 for Figure 7 a cross-sectional view of the sheath fixation assembly shown;

[0039] Figure 9 This is a structural schematic diagram of a wire winding locking mechanism in a sheath bending adjustment handle according to an embodiment of the present invention;

[0040] Figure 10 This is another structural schematic diagram of the wire winding locking mechanism in the sheath bending adjustment handle according to the first embodiment of the present invention;

[0041] Figure 11 for Figure 9A front view of the winding wheel and the main shaft in the winding locking mechanism shown;

[0042] Figure 12 for Figure 11 A cross-sectional view in the AA direction;

[0043] Figure 13 for Figure 11 Another cross-sectional view in the AA direction;

[0044] Figure 14 for Figure 9 A front view of the winding locking mechanism and the pulling wire is shown;

[0045] Figure 15 for Figure 14 Cross-sectional view in the middle BB direction;

[0046] Figure 16 This is a schematic diagram of the partial structure of the sheath bending adjustment handle according to the second embodiment of the present invention;

[0047] Figure 17 This is a schematic structural diagram of the sheath bending handle according to the third embodiment of the present invention;

[0048] Figure 18 Schematic diagram of the partial structure of the sheath bending handle of the third embodiment of the present invention Figure 1 ;

[0049] Figure 19 This is a schematic diagram of the partial structure of the sheath bending adjustment handle including the top cover according to the third embodiment of the present invention;

[0050] Figure 20 Schematic diagram of the local structure of the sheath bending handle of the third embodiment of the present invention Figure 2 ;

[0051] Figure 21 A schematic structural diagram of a conveying device according to an embodiment of the present invention;

[0052] Figure 22 Schematic diagram of the structure of a valve repair system according to an embodiment of the present invention.

[0053] The symbols in the accompanying drawings represent the following:

[0054] 1000, delivery device; 2000, sheath; 3000, puller wire; 3001, first puller wire; 3002, second puller wire; 3003, third puller wire; 4000, valve clipper; 5000, valve repair system;

[0055] 100. Sheath bending handle;

[0056] 10. Housing; 11. Top cover; 12. Bottom housing; 101. Sheath tube channel; 102. Mounting seat; 1021. First groove; 1022. Second groove;

[0057] 20. Winding locking mechanism; 201. First winding locking mechanism; 202. Second winding locking mechanism; 21. Spindle; 2101. First spindle; 2102. Second spindle; 211. First axial hole; 212. Second axial hole; 22. Winding reel; 2201. First winding reel; 2202. Second winding reel; 221. Winding groove; 2211. First winding groove; 2212. Second winding groove; 2213. Third winding groove; 222. Sheath avoidance groove; 223. Wire hole; 224. Wire locking hole; 23. Wire pressing member;

[0058] 30. Drive assembly; 301. First drive assembly; 302. Second drive assembly; 31. Knob; 32. Worm; 33. Worm gear;

[0059] 40. Sheath fixing assembly; 41. Pressure ring; 42. Fixing flange; 421. Center hole; 43. Shrink ring; 431. Support ring; 432. Movable piece; 44. Abutment member;

[0060] 50. Bearing; 60. Pointer; 70. Limiting mechanism; 701. First limiting mechanism; 702. Second limiting mechanism; 71. Rotating member; 711. First rotating rod; 712. Second rotating rod; 72. Limiting plate; 80. Wire stop rod; 90. Gear set. DETAILED DESCRIPTION

[0061] As described in the background technology, the existing sheath bending handle needs to be continuously unlocked, pulled, locked, and unlocked during use, resulting in instability of the traction line, and the alternating operation of multiple mechanisms is prone to errors, which greatly affects the surgical effect and efficiency. In this regard, the present invention proposes a sheath bending handle. On the basis of fixing the sheath part in the handle shell, a worm gear mechanism is used to drive the winding wheel. The winding wheel's restraining function on the traction line is combined with the self-locking function of the worm gear mechanism, so that the operator only needs to rotate a knob to ensure that the traction line is tightened and will not retreat, and it can be further tightened as the winding wheel rotates, thereby driving the sheath to bend. It can be seen that the handle proposed by the present invention is easy to operate, can also ensure the stability of the traction line, and has a simple and compact structure. The overall size of the handle is small and light.

[0062] The following will refer to the drawings in the embodiments of the present invention. The terms used in the text are only for the purpose of describing specific example implementation methods and are not to be understood as limiting 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 a sequence or order; the terms "inside", "outside", "above", and "below" are only for the convenience of describing the relationship of one feature relative to another feature shown in the drawings, and do not indicate that they 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 its natural state. In the description of the present invention, the above definitions are only for the convenience of expression and are not to be understood as limiting the present invention.

[0063] See also Figures 1 to 3 The embodiment of the present invention proposes a sheath bending handle 100, which includes a shell 10, at least one winding locking mechanism 20 and at least one set of drive components 30. The shell 10 is provided with a sheath channel 101 for partially passing the sheath 2000 through the shell 10; the winding locking mechanism 20 is arranged in the shell 10, and the winding locking mechanism 20 includes a main shaft 21 and a winding wheel 22. The winding wheel 22 is used to store and connect the pulling wire 3000 of the sheath 2000. When the winding wheel 22 rotates in a set direction, it can pull the pulling wire 3000 to make the distal end of the sheath 2000 bend in the set direction; each set of drive components 30 cooperates with a winding locking mechanism 20, and the drive component 30 includes a knob 31, a worm 32 and a worm gear 33 connected in sequence. The worm gear 33 is connected to the main shaft 21 to drive the winding wheel 22 to rotate.

[0064] The sheath bending handle 100 proposed in this embodiment can be used in the conveying device 1000. The sheath bending handle 100 is used in conjunction with one or more sheaths 2000 to bend the distal end of the sheath 2000 in a set direction as required. It can be understood that the distal end of the sheath 2000 has a bendable tube section, and the sheath 2000 is provided with a pull wire 3000 connected to the bendable tube section. 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.

[0065] On this basis, if Figure 2As shown, in this embodiment, the part of the sheath 2000 close to the proximal end is passed through the shell 10, and the pulling wire 3000 extending from the sheath 2000 is also located in the shell 10 and connected to the winding wheel 22 of the winding locking mechanism 20. 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. This 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. 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 by the tension 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 is stopped. Therefore, the sheath bending handle 100 proposed in this 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 is stable during use, which is conducive to improving the surgical effect.

[0066] Please continue reading Figure 2 、 Figure 3 and Figure 4 A storage space is formed inside the housing 10, and a portion of the sheath tube 2000, the winding locking mechanism 20, and the worm gear 33 and worm 32 are placed inside the housing 10. In this embodiment, the housing 10 may include a top cover 11 and a bottom shell 12. The top cover 11 and the bottom shell 12 are snapped together and connected. The connection method can be snap-fitting, 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 not only facilitates the production and assembly of the housing 10, but also facilitates subsequent maintenance or replacement of components inside the housing 10. Furthermore, the top cover 11 and the bottom shell 12 can be respectively formed by three-dimensional printing or injection molding. The outer walls of the top cover 11 and the bottom shell 12 can also be provided with recessed portions to facilitate the operator's grip during use. This embodiment does not specifically limit the shape and molding method of the housing 10.

[0067] For further information, please refer to Figure 1 and Figure 4In this embodiment, the housing 10 is provided with a sheath channel 101 for the sheath tube 2000 to pass through. It can be understood that the proximal section of the sheath tube 2000 needs to be located in the sheath tube bending handle 100. Two sheath channels 101 are provided, and the two sheath channels 101 are respectively provided on two opposite side walls of the housing 10. The sheath tube 2000 extends into the housing 10 from one sheath channel 101 and extends from the other sheath channel 101. This can improve the stability of the proximal portion of the sheath tube 2000 and prevent excessive shaking of the sheath tube 2000. In this embodiment, the sheath channel 101 can be set as a circular through hole that matches the sheath tube 2000, or it can be set as a through hole of other shapes.

[0068] Further, see Figure 2 and Figure 3 In some embodiments of the present invention, the sheath bending handle 100 also includes a sheath fixing assembly 40, which is connected to the shell 10 and can hold the sheath 2000 tightly to prevent the sheath 2000 from moving or rotating relative to the shell 10, and is used to further fix the sheath 2000 and improve the stability of the sheath 2000. The number of sheath fixing assemblies 40 can be set in one group or in two groups. For example, according to the above embodiment, there are two sheath channels 101, and the sheath fixing assembly 40 can be set in one group and arranged close to one of the sheath channels 101, thereby improving the stability of the sheath 2000.

[0069] In this embodiment, the sheath fixing assembly 40 has various structures. In an optional embodiment, please continue to refer to Figure 2 and Figure 3 , and refer to Figure 5 and Figure 6 Each set of sheath fixing components 40 includes two pressure rings 41 arranged opposite to each other. The two pressure rings 41 are fastened and connected to hold the sheath 2000 tightly, so that the sheath 2000 cannot move axially or rotate, which is beneficial to the stability of the sheath 2000 and the pull wire 3000 extending from the sheath 2000. For example, the two pressure rings 41 have the same structure, such as Figure 6 As shown, the cross-sectional shape of the portion where the pressure ring 41 embraces the sheath tube 2000 is arc-shaped or semicircular, and connecting plates are extended on both sides of the pressure ring 41. When the two pressure rings 41 are buckled and connected, the connecting plates on the same side of the two pressure rings 41 are aligned and abutted. On this basis, the two connecting plates can be connected by welding, or the two connecting plates can be penetrated by fasteners, so that the two pressure rings 41 are connected and embrace the sheath tube 2000.

[0070] Based on the above implementation, please refer to Figure 4, the shell 10 may also be provided with a mounting seat 102 for installing the sheath fixing assembly 40. The mounting seat 102 may be provided inside the shell 10 or outside the shell 10, and the mounting seat 102 is formed on the shell 10 in an integral molding manner, for example, it may be connected to the inner wall of the shell 10 or to the outer wall of the shell 10. When the shell 10 includes a top cover 11 and a bottom shell 12, the mounting seat 102 may be provided on the top cover 11 or the bottom shell 12, or the mounting seat 102 may be provided on both the top cover 11 and the bottom shell 12. Exemplarily, a first mounting seat is provided at a portion of the top cover 11 close to the bottom shell 12, and a second mounting seat is provided at a portion of the bottom shell 12 close to the top cover 11. Recesses are provided on the side wall of the top cover 11 close to the first mounting seat and on the side wall of the bottom shell 12 close to the second mounting seat, respectively. For reference, Figure 3 When the top cover 11 and the bottom shell 12 are buckled together, the two recessed portions enclose and form a sheath channel 101 .

[0071] Based on the above implementation, please continue to refer to Figure 4 、 Figure 5 and Figure 6 When the sheath fixing assembly 40 includes two pressure rings 41, the two pressure rings 41 are connected by fasteners, which can be screws or bolts. On this basis, the first mounting seat and the second mounting seat are respectively provided with first grooves 1021 that match the pressure rings 41. The two first grooves 1021 are arranged opposite to each other, and the shape of the first grooves 1021 is adapted to the shape of the pressure rings 41. Each pressure ring 41 is at least partially embedded in the first groove 1021. During the assembly process, the two pressure rings 41 can be first connected to the sheath 2000 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 shell 12 are fastened together, the two first grooves 1021 are fastened to form a accommodating space for the two pressure rings 41, so that the partial pipe section of the sheath 2000 and the sheath fixing assembly 40 are fixed in the housing 10. This arrangement facilitates assembly and further improves the stability of the sheath fixing assembly 40 and the sheath 2000.

[0072] For further information, please refer to Figure 4The mounting seat 102 is further provided with a second groove 1022, which is used to accommodate the end of the fastener connecting the two pressure rings 41. For example, the second groove 1022 can be provided on the first mounting seat or the second mounting seat, or the first mounting seat and the second mounting seat are respectively provided with a second groove 1022. The two second grooves 1022 are arranged opposite to each other and match the two ends of the fastener. They can not only accommodate the end of the fastener to connect the sheath fixing assembly 40 to 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, thereby improving 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. This embodiment does not specifically limit this.

[0073] 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 is sleeved on the sheath tube 2000, and the retractable member 43 holds the sheath tube 2000 tightly when in the retracted state, thereby preventing the sheath tube 2000 from moving and rotating axially.

[0074] For example, in this embodiment, the retractable member 43 includes a support ring 431 and a plurality of movable pieces 432 connected to the support ring 431. The movable pieces 432 extend axially and can rotate within a set range around the connection with the support ring 431. It can be understood that when the plurality of movable pieces 432 rotate and retract toward the axis of the support ring 431, they can tightly embrace the sheath tube 2000. On this basis, in this embodiment, the center hole 421 of the fixing flange 42 can be configured to squeeze the retractable member 43 to retract it, or a component for squeezing the retractable member 43 to retract it can be provided in the center hole 421. During assembly, the retractable member 43 can first be connected to the sheath tube 2000 and then inserted into the center hole 421, so that the retractable member 43 is squeezed and retracted, thereby fixing the sheath tube 2000.

[0075] In an optional embodiment, the central hole 421 includes a tapered hole section, and the retractable member 43 is movably disposed within the tapered hole section of the central hole 421. The support ring 431 of the retractable member 43 is located near the large end of the tapered hole section, and the end of the movable piece 432, away from the support ring 431, is located near 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. Thus, when the retractable member 43 moves toward the small end, the movable piece 432 is squeezed inward by the inner wall of the tapered hole section, thereby tightly embracing the sheath tube 2000 and preventing the sheath tube 2000 from moving axially or rotating.

[0076] 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. Based on this, the sheath 2000 passing through the central hole 421 is partially located within the retractable member 43 and partially located within the abutment member 44. Based on this, the abutment member 44 can press the retractable member 43 in the axial direction, causing the retractable member 43 to move toward the small end. Exemplarily, the abutment 44 can be set to a screw shape, the outer wall of the abutment 44 can be provided with an external thread, 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 component 43, and then a thrust is applied to the retractable component 43 when it continues to move, so that the retractable component 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 component 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.

[0077] Please continue reading Figure 1 、 Figure 2 and Figure 3For example, the drive assembly 30 includes a knob 31, a worm 32, and a worm wheel 33 connected in sequence. The knob 31 is located outside the housing 10, and the worm 32 and the worm wheel 33 are located inside the housing 10. A connecting boss is provided on the side of the knob 31 facing the housing 10, and a connecting hole is provided on the connecting boss. The central axis of the worm 32 partially extends out of the housing 10 and extends into the connecting hole to be connected to the knob 31. The central axis and the connecting hole can be set to an interference fit, or can be connected by a fastener. In an optional embodiment, the connecting boss is provided with a threaded hole in the radial direction, so that a screw or bolt can be inserted from the threaded hole to abut or engage with the central axis of the worm 32, thereby improving the reliability of the connection between the worm 32 and the knob 31.

[0078] On the basis of the above implementation mode, Figure 2 As shown, the worm gear 33 is rotatably arranged in the housing 10, and the two ends of the worm 32 are rotatably connected to the side walls of the housing 10 respectively, and the spiral tooth part of the worm 32 is engaged with the worm gear 33, and 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 winding locking mechanism 20, and can drive the main shaft 21 and the winding wheel 22 to rotate. Therefore, the main shaft 21, the winding wheel 22 and the worm gear 33 are coaxially arranged, the structure is compact, and the installation space is saved, which further reduces the overall volume of the sheath bending adjustment handle 100. Moreover, the driving mode of the worm gear 33 and the worm 32 has a self-locking function, which ensures the stability of the winding locking mechanism 20 and the pulling line 3000.

[0079] Furthermore, in some embodiments of the present invention, the sheath bending handle 100 further includes a plurality of bearings 50. For example, please continue to refer to Figure 2 The main shaft 21 and the worm 32 of the winding locking mechanism 20 are respectively arranged in the housing 10 in a direction perpendicular to the axis of the sheath 2000. The two ends of each main shaft 21 are respectively connected to bearings 50, and the two ends of each worm 32 are also respectively connected to bearings 50. Accordingly, a plurality of mounting holes for installing bearings 50 are provided on the housing 10. This embodiment improves the stability of the main shaft 21 and the worm 32 by providing the bearings 50, reduces the resistance of the main shaft 21 and the worm 32 during rotation, and thereby improves the user experience and bending efficiency of the sheath bending adjustment handle 100.

[0080] During use of the sheath bending handle 100, the operator rotates the knob 31, which drives the worm 32 to rotate. The worm 32 drives the worm gear 33 meshing therewith to rotate. The worm gear 33 drives the main shaft 21 and the winding wheel 22 of the winding locking mechanism 20, which are coaxially arranged therewith, to rotate. This in turn pulls the pull wire 3000 connected to the winding wheel 22, thereby bending the distal end of the sheath 2000. In this embodiment, the winding wheel 22 can accommodate and connect the pull wire 3000. It is understandable that the structure of the winding locking mechanism 20 varies depending on the number of pull wires 3000 to be matched.

[0081] For example, 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 component 23. The main shaft 21 is connected to 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. 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 locking wire holes 224 in a direction perpendicular to the axial direction. The part of the traction wire 3000 extending from the sheath 2000 is wound around the winding groove 221, and the part of the traction wire 3000 near the end is extended into the wire hole 223; the wire pressing component 23 is arranged in the locking wire hole 224 and presses the traction wire 3000.

[0082] Based on the above implementation, please continue to refer to Figure 2 and Figure 3 The winding wheel 22 may be provided with one winding groove 221 or multiple winding grooves 221. The number of the winding grooves 221 is set according to the number of the pulling wires 3000. When the winding wheel 22 is provided with one winding groove 221, the winding wheel 22 is used for winding one pulling wire 3000; when the winding wheel 22 is provided with two winding grooves 221, 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.

[0083] Furthermore, along the axial direction of the winding wheel 22, the width of the winding groove 221 can be set according to actual needs. In one possible embodiment, the width of the winding groove 221 is greater than or equal to the outer diameter of the sheath tube 2000. Figure 2 As shown, the sheath tube 2000 inserted into 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, the sheath tube 2000 is partially located in the winding groove 221. Furthermore, the outer wall of the sheath tube 2000 can contact or maintain a small distance with the bottom surface of the winding groove 221, that is, the busbar 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 matches the shape of the outer wall of the sheath tube 2000 to form a larger accommodating space, so that the sheath tube 2000 can contact or maintain a small distance with the bottom surface of the groove. This arrangement can make the traction line 3000 extending from the sheath tube 2000 keep tangent or approximately tangent to the winding wheel 22 as much as possible when it is wound onto the winding wheel 22, thereby preventing the traction line 3000 from scratching the outer wall of the sheath tube 2000 when it is pulled.

[0084] In some embodiments of the present invention, one or more baffles may be provided on the winding wheel 22, and the baffles are located at the notch of the winding groove 221 to block the pulling wire 3000. For example, since the winding groove 221 is a recessed portion provided on the outer wheel wall of the winding wheel 22, the portions located on both sides of the winding groove 221 along the axial direction of the winding wheel 22 are bosses relative to the winding groove 221. On this basis, the baffles can be integrally formed on the bosses on both sides of the winding groove 221, and the baffles extend toward the direction of the winding groove 221, thereby blocking part of the winding groove 221. When the winding wheel 22 rotates in a direction opposite to the winding direction of the pulling wire 3000, the pulling wire 3000 located in the winding groove 221 may become loose. The provision of the baffle in this embodiment can reduce or avoid the possibility of the pulling wire 3000 falling off after loosening.

[0085] On the basis of the above embodiment, the wire pressing member 23 extends into the locking wire hole 224 to press the pulling wire 3000. The wire pressing member 23 can be provided with one or more. For example, the pressing method can be that the end of a 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 the two; the wire hole 223 can be set as a blind Hole or through hole, the locking wire hole 224 can also be set as a blind hole or a through hole, the through wire hole 223 and the locking wire hole 224 can be set along the radial direction of the winding wheel 22, or can be set in a direction parallel to the tangent of the winding wheel 22. In addition, the through wire hole 223 and the locking wire hole 224 are extended inward from the outer wheel wall of the winding wheel 22. For example, the through wire hole 223 and the locking wire hole 224 can be set inward from the winding groove 221, or can be set inward from other parts of the winding wheel 22. This embodiment does not limit the specific structure and position of the through wire hole 223 and the locking wire hole 224, and it is sufficient to ensure that the through wire hole 223 is connected to the locking wire hole 224 and that the wire pressing member 23 can press the pulling wire 3000.

[0086] In some embodiments of the present invention, see Figures 9 to 13 , the wire-through hole 223 and the wire-locking hole 224 respectively penetrate the winding wheel 22 along the radial direction of the winding wheel 22 from the bottom of the winding groove 221, that is, the openings of the wire-through hole 223 and the wire-locking hole 224 are both located in the winding groove 221, and the wire-through hole 223 and the wire-locking hole 224 are both arranged radially, and the axis of the wire-through hole 223 intersects the axis of the wire-locking hole 224, and an acute angle or a right angle can be formed between the two axes. In an optional embodiment, 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 center hole 421 for cooperating with the main shaft 21, the wire passing hole 223 and the wire locking hole 224 set on the winding wheel 22 both include two hole segments separated by the center hole 421. For ease of understanding, this embodiment uniformly describes the two hole segments of the wire passing hole 223 as the wire passing hole 223, and the two hole segments of the wire locking hole 224 as the wire locking hole 224.

[0087] Based on the above implementation, please continue to refer to Figure 12 and Figure 13 The main shaft 21 is radially provided with at least one set of intersecting and communicating first and second axial holes 211 and 212. In this embodiment, the first axial hole 211 is coaxially arranged with the wire-through hole 223 and is located between the two hole sections of the wire-through hole 223. The second axial hole 212 is coaxially arranged with the locking wire hole 224 and is located between the two hole sections of the locking wire hole 224. On the basis that the axis of the wire-through hole 223 is perpendicular to the axis of the locking wire hole 224, the axis of the first axial hole 211 intersects and is perpendicular to the axis of the second axial hole 212. On this basis, the wire pressing member 23 for pressing the puller wire 3000 cooperates with the locking wire hole 224 and the second axial hole 212, respectively.

[0088] In some embodiments of the present invention, see Figure 9 and Figure 10 , and refer to Figure 14 and Figure 15 , the wire pressing member 23 is provided with at least one group, and the number of wire pressing members 23 in each group is two. It can be understood that the number of groups of the wire pressing members 23 and the number of groups of the first axial hole 211 and the second axial hole 212 are all set according to the number of wire holes 223 or wire locking holes 224 on the winding wheel 22. When the winding wheel 22 cooperates with a pulling wire 3000 and one wire locking hole 224 is provided, the first axial hole 211 and the second axial hole 212 are correspondingly provided with a group, and the wire pressing member 23 is correspondingly provided with a group; when the winding wheel 22 cooperates with two pulling wires 3000, When there are two locking wire holes 224, two groups of first axial holes 211 and second axial holes 212 are correspondingly provided, and two groups of wire pressing components 23 are correspondingly provided. According to the above embodiment, each group of two wire pressing components 23 are respectively passed through the two ends of the locking wire hole 224 and abutted against the locking wire hole 224 and the second axial hole 212 to clamp the pulling wire 3000. Therefore, the two wire pressing components 23 in this embodiment not only press the wire, but also play the role of connecting the main shaft 21 and the winding wheel 22, which facilitates assembly, reduces the number of parts, and improves the compactness of the structure.

[0089] In an optional embodiment, the wire pressing member 23 is configured as a stud, and accordingly, the wire locking hole 224 can be configured as a through hole, and the inner wall of the second shaft hole 212 can be provided with a thread, so that the stud is inserted into the wire locking hole 224 and matches with the thread of the second shaft hole 212 until the end faces of the two opposite studs abut and clamp the pull wire 3000. Furthermore, the end face of the wire pressing member 23 used to compress the pull wire 3000 is provided with concave and convex stripes. Taking the wire pressing member 23 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, the concave and convex stripes fit together to increase friction, thereby further improving the compression effect on the pull wire 3000.

[0090] During the assembly process of the wire winding locking mechanism 20 in this embodiment, the proximal end portion of the pull wire 3000 can be first placed in the wire through hole 223 and the first axial hole 211, and then the two wire pressing members 23 are respectively passed inward from the two outer openings of the wire locking hole 224 until the ends of the two wire pressing members 23 abut against each other, thereby pressing the pull wire 3000 at the connection between the first axial hole 211 and the second axial hole 212. When the winding wheel 22 rotates in the winding direction of the pull wire 3000, the pull wire 3000 can be tightened, thereby causing the distal end of the sheath tube 2000 to bend in a set direction. To sum up, 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 winding wheel 22, which is more reliable than the method of only winding or using adhesive connection. It can avoid the proximal end of the pulling wire 3000 from interfering with other components such as the worm wheel 33 or the worm 32, and reduces the risk of the pulling wire 3000 being disordered inside the handle.

[0091] Furthermore, since the rotation of the winding wheel 22 causes the pulling wire 3000 to be pulled, thereby driving the distal end of the sheath tube 2000 to bend, the degree of bending of the sheath tube 2000 is related to the rotation angle of the winding wheel 22. In some embodiments of the present invention, such as Figure 1 As shown, the sheath bending handle 100 further includes a pointer 60. The pointer 60 can be coaxially arranged with the winding wheel 22 and can also be provided with corresponding scale markings. Thus, the pointer 60 can be used to indicate the rotation angle of the winding wheel 22. The operator can judge the degree of bending of the sheath 2000 based on the angle indicated by the pointer 60, which helps the operator understand the surgical situation. It can be understood that the number of pointers 60 is equal to the number of winding locking mechanisms 20 in the sheath bending handle 100, that is, one pointer 60 is used to indicate the rotation angle of one winding wheel 22.

[0092] On the basis of the above embodiment, 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 at the same angle, and 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 optional embodiment, as Figure 1 As shown, each pointer 60 is connected to the end of a spindle 21. For example, the end of the spindle 21 is connected to the housing 10 through a bearing 50. The end face of the spindle 21 can be exposed outside the housing 10. The pointer 60 connected to the spindle 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 spindle 21. A connecting portion is provided on the side of the pointer 60 facing the spindle 21. The connecting portion and the spindle 21 can be set to be welded, clamped or connected by fasteners. On this basis, the outer surface of the housing 10 is marked with scale lines, and the pointer 60 is parallel to the surface marked with the scale lines, which improves the accuracy of the indication and is convenient for the operator to read. In addition, a transparent cover can be connected to the outside of 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 and wear.

[0093] In some embodiments of the present invention, see Figure 2 、 Figure 3 and Figure 4 The sheath bending adjustment handle 100 further includes a limiting mechanism 70. In this embodiment, the limiting mechanism 70 can be installed in the housing 10 to limit at least one of the rotation range and rotation direction of the winding reel 22. The number of limiting mechanisms 70 is the same as the number of the winding locking mechanisms 20. For example, 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 reel 22 from rotating in a direction that causes the pull wire 3000 to loosen, or can control the rotation range, thereby preventing the winding reel 22 from excessively rotating and tearing the pull wire 3000, thereby preventing the pull wire 3000 from breaking.

[0094] 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, it can be integrally formed on the housing 10. The limiting plate 72 can be in the shape of a rectangular plate, a fan-shaped plate, or an irregular shape, which is not specifically limited in this embodiment. 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 optional embodiment, as shown in FIG. Figure 2As shown, the rotating member 71 is connected to the main shaft 21. The connection between the two can be integrally formed, welded, plugged, or connected via fasteners. The rotating member 71 can be configured as a rotating plate or a rotating rod. The shape of the rotating rod can be configured as a cylindrical rod, a Z-shaped rod, an L-shaped rod, or an irregular shape, which is not specifically limited in this embodiment. Taking the cylindrical rod shape as an example, the axis of the rotating member 71 is perpendicular to the axis of the main shaft 21. The end of the rotating member 71 is used to abut against the limit plate 72 to prevent rotation, thereby limiting the rotation of the main shaft 21 and the winding reel 22.

[0095] On the basis of the above embodiment, the number of limiting plates 72 is set according to the factors to be limited by the limiting mechanism 70. Taking the example of the winding locking mechanism 20 and the limiting mechanism 70 both being one, the limiting mechanism 70 may include a rotating member 71 and two limiting plates 72. The two ends of the rotating member 71 are respectively abutted against the side surfaces 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 abutment direction, thereby achieving the purpose of limiting the rotation direction; when the rotating member 71 rotates to the set position, it abuts against the other side surface of the limiting plate 72, thereby limiting the main shaft 21 and the winding wheel 22 from continuing to rotate, thereby achieving the purpose of limiting the rotation range.

[0096] The sheath bending handle 100 proposed in this embodiment cooperates with a sheath 2000 that can be bent in one or more directions. It can be understood that when the sheath 2000 is provided with one pull wire 3000, the pull wire 3000 drives the distal end of the sheath 2000 to bend in one direction. In this case, the sheath bending handle 100 is a unidirectional bending handle; when the sheath 2000 is provided with two pull wires 3000, the two pull wires 3000 can drive the sheath 2000 to bend in two different directions. In this case, the sheath bending handle 100 is a bidirectional bending handle; when the sheath 2000 is provided with three pull wires 3000, the three pull wires 3000 can drive the sheath 2000 to bend in three different directions. In this case, the sheath bending handle 100 is a three-directional bending handle. The following describes the three-directional bending method, the bidirectional bending method, and the unidirectional bending method in turn through three embodiments.

[0097] Example 1

[0098] See also Figures 1 to 15 The sheath tube bending handle 100 proposed in this embodiment can adjust the sheath tube 2000 in three directions. That is, the sheath tube bending handle 100 proposed in this embodiment can cooperate with the three pull wires 3000 of the sheath tube 2000, so that the distal end of the sheath tube 2000 is bent in three different directions under the pull of the three pull wires 3000. Figures 1 to 4As shown, the sheath bending handle 100 includes a shell 10, two sets of drive components 30, and two winding locking mechanisms 20. Each set of drive components 30 cooperates with a winding locking mechanism 20. The sheath 2000 is passed through the shell 10. The two sets of winding locking mechanisms 20 are arranged in the shell 10 along the axial direction of the sheath 2000. The three pulling wires 3000 all extend from the tube section of the sheath 2000 located in the shell 10 and cooperate with the two winding locking mechanisms 20.

[0099] In this embodiment, the two drive components 30 are respectively a first drive component 301 and a second drive component 302. Figure 2 As shown, the first drive assembly 301 and the second drive assembly 302 can be installed in the housing 10 in opposite directions. As a result, the knob 31 of the first drive assembly 301 and the knob 31 of the second drive assembly 302 are respectively located on opposite sides of the housing 10. This arrangement can avoid interference between the two knobs 31 and is conducive to improving the compactness of the internal structure of the housing 10, fully utilizing the installation space within the housing 10, and reducing the overall volume of the sheath bending handle 100. Furthermore, the structures of the first drive assembly 301 and the second drive assembly 302 can be the same. The specific structures of the housing 10, the first drive assembly 301 and the second drive assembly 302 refer to the above embodiment and are not repeated here.

[0100] Please continue reading Figure 2 and Figure 3 , for example, the two winding locking mechanisms 20 are respectively the first winding locking mechanism 201 and the second winding locking mechanism 202, and the three pulling wires 3000 are respectively the first pulling wire 3001, the second pulling wire 3002 and the third pulling wire 3003, the first winding locking mechanism 201 cooperates with the first pulling wire 3001, and the second 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 winding wheel 2201 of the first winding locking mechanism 201 to rotate, thereby pulling the first pulling wire 3001, and the second driving component 302 drives the second winding wheel 2202 of the second winding locking mechanism 202 to rotate, thereby pulling the second pulling wire 3002 or the third pulling wire 3003 through different rotation directions. Therefore, the sheath bending handle 100 proposed in this embodiment is easy for the operator to operate, which solves the problem of cumbersome operation of the sheath bending handle 100.

[0101] Please continue reading Figure 2 and Figure 3 , combined with reference Figure 9 and Figure 10In this embodiment, the first winding locking mechanism 201 includes a first main shaft 2101 and a first winding wheel 2201, and the second winding locking mechanism 202 includes a second main shaft 2102 and a second winding wheel 2202. The first winding wheel 2201 is provided with a winding groove 221, a group of wire holes 223 and a wire locking hole 224, and the first main shaft 2101 is provided with a group of first shaft holes 211 and second shaft holes 212; the second winding wheel 2202 is provided with two winding grooves 221, two groups of wire holes 223 and a wire locking hole 224, and the second main shaft 2102 is provided with two groups of first shaft holes 211 and second shaft holes 212. In addition, as Figure 1 As shown, pointers 60 are respectively connected to the ends 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. Accordingly, two sets of scale lines and two transparent covers that cooperate with the two pointers 60 are provided on the shell 10.

[0102] Please continue reading Figure 9 and Figure 15 The outer wheel wall of the first winding wheel 2201 is provided with a first winding groove 2211 along the circumferential ring, and the first winding wheel 2201 is radially penetrated by a group of vertically connected wire holes 223 and wire locking holes 224. After the first traction wire 3001 extends from the sheath 2000, it is first wound in the first winding groove 2211. The part of the first traction wire 3001 close to the proximal end extends into the wire hole 223 and the first shaft hole 211, and is clamped by two pulling components. Therefore, when the first winding wheel 2201 rotates in the winding direction of the first traction wire 3001, the first traction wire 3001 can be tightened, thereby causing the distal end of the sheath 2000 to bend toward the first direction.

[0103] In some embodiments of the present invention, Figure 2 As shown, the sheath tube 2000 passed through the shell 10 is partially located in the first winding groove 2211, the axis of the sheath tube 2000 is parallel to the tangent of the first winding wheel 2201, and the first pulling wire 3001 extends from the side of the sheath tube 2000 facing the first winding groove 2211, extends along the tangent and is wound in the first winding groove 2211 in a counterclockwise direction. Furthermore, the bottom surface of the first winding groove 2211 is set to an arc surface, and the bottom surface of the groove is consistent with the shape of the outer wall of the sheath tube 2000. Thus, the first pulling wire 3001 and the first winding wheel 2201 are kept tangent or approximately tangent as much as possible, which can prevent the first pulling wire 3001 from scratching the outer wall of the sheath tube 2000 when being pulled.

[0104] See also Figure 10The outer wheel wall of the second winding wheel 2202 is provided with a second winding groove 2212 and a third winding groove 2213 along the circumferential ring. The second winding groove 2212 and the third winding groove 2213 are arranged along the axial direction. 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 that cooperates 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 and then wound in the second winding groove 2212, and extends into the corresponding wire hole 223 and the first axial hole 211 and is clamped by two pulling components; the third pulling wire 3003 is extended from the sheath tube 2000 and then wound in the third winding groove 2213, and extends into the corresponding wire hole 223 and the first axial hole 211 and is clamped by two pulling components. In this embodiment, the winding directions of the second pull wire 3002 and the third pull wire 3003 are opposite. Taking the second pull wire 3002 being wound in a clockwise direction and the third pull wire 3003 being wound in a counterclockwise direction as an example, when the second winding wheel 2202 rotates in a clockwise direction, the second pull wire 3002 can be pulled, thereby causing the distal end of the sheath 2000 to bend toward the second direction. When the second winding wheel 2202 rotates in a counterclockwise direction, the third pull wire 3003 can be pulled, thereby causing the distal end of the sheath 2000 to bend toward a third direction opposite to the second direction.

[0105] Based on 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 through in 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 pull wire 3002 and the third pull wire 3003 is kept tangent or approximately tangent to the second winding wheel 2202 as much as possible, reducing or avoiding scratches on the outer wall of the sheath 2000.

[0106] Furthermore, in some embodiments of the present invention, Figure 2 and Figure 10As shown, the outer wheel wall of the second winding wheel 2202 is also provided with a sheath avoidance groove 222. Along the axial direction of the second winding wheel 2202, the sheath 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 avoidance groove 222 can be arranged in a ring on the outer wheel wall of the second winding wheel 2202, or it can be arranged only on the part of the second winding wheel 2202 facing the sheath 2000. This embodiment does not specifically limit the shape of the sheath avoidance groove 222. The sheath avoidance groove 222 can accommodate a partial section of the sheath 2000, and the bottom surface of the sheath avoidance groove 222 can also contact the side wall of the sheath 2000. Furthermore, the bottom surface of the sheath avoidance groove 222 can be set to an arc surface and match the shape of the outer wall of the sheath 2000, so that the second pull line 3002 and the third pull line 3003 are as close to the second winding wheel 2202 as possible, reducing or avoiding scratches on the outer wall of the sheath 2000.

[0107] On the basis of the above implementation mode, Figure 2 As shown, the axis of the sheath tube 2000 is parallel to the tangent direction of the second winding wheel 2202. The second puller wire 3002 extends from the side of the sheath tube 2000 facing the top cover 11, extends obliquely upward, and is wound in the second winding groove 2212 in a clockwise direction. The third puller wire 3003 extends from the side of the sheath tube 2000 facing the bottom shell 12, extends obliquely downward, and is wound in the third winding groove 2213 in a counterclockwise direction. In this way, while ensuring that the second puller wire 3002 and the third puller wire 3003 are respectively connected to the second winding wheel 2202, the second puller wire 3002 and the third puller wire 3003 can be prevented from interfering with each other.

[0108] Furthermore, in some embodiments of the present invention, Figure 2 and Figure 3As shown, the sheath bending handle 100 also includes a wire blocking rod 80. It can be understood that since the second pulling wire 3002 is wound in the second winding groove 2212 in a clockwise direction after extending from the sheath 2000, when the second winding wheel 2202 rotates in a clockwise direction, the second pulling wire 3002 close to the sheath 2000 has a movement trend away from the sheath 2000, which is easy to scratch the outer wall of the sheath 2000. In this embodiment, the wire blocking rod 80 is set between the sheath 2000 and the second The angle between the winding wheels 2202 and the wire blocking rod 80 is in contact with the second pulling wire 3002, so that the second pulling wire 3002 is blocked and then wound into the second winding groove 2212. Therefore, when the second pulling wire 3002 is pulled, the wire blocking rod 80 can prevent the second pulling wire 3002 from moving in a direction away from the above-mentioned angle and make the second pulling wire 3002 move in a direction close to the above-mentioned angle first, thereby preventing the second pulling wire 3002 from scratching the outer wall of the sheath tube 2000. In this embodiment, the wire blocking rod 80 can be connected to the housing 10 by snapping, plugging or fastener connection, or it can be integrally formed in the housing 10.

[0109] Further, see Figures 2 to 4 , in this embodiment, there are two limiting mechanisms 70, the two limiting mechanisms 70 are 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 embodiment, the first pulling line 3001 is wound counterclockwise on the first winding wheel 2201, in this embodiment, the first rotating rod 711 is vertically connected to the first main shaft 2101, and the two ends of the first rotating rod 711 are respectively abutted against the two limiting plates 72 in the initial state, so that the first rotating rod 711 cannot rotate clockwise, and can only rotate counterclockwise to pull the first pulling line 3001, so as to prevent the operator from turning the knob 31 in the wrong direction, thereby preventing the first pulling line 30 01 Loose and falling off; the second limiting mechanism 702 cooperates with the second winding locking mechanism 202, and the second limiting mechanism 702 includes a second rotating rod 712 and a limiting plate 72. According to the above embodiment, the second pulling line 3002 and the third pulling line 3003 are both wound on 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 limiting the rotation range of the second winding wheel 2202. This can prevent the operator from excessively turning the knob 31, thereby preventing the second pulling line 3002 from loosening and falling off, the third pulling line 3003 from being torn and broken, or preventing the second pulling line 3002 from being torn and broken, and the third pulling line 3003 from loosening and falling off.

[0110] Example 2

[0111] See also Figure 16 The sheath bending adjustment handle 100 proposed in this embodiment can adjust the sheath 2000 in two directions. That is, the sheath bending adjustment handle 100 proposed in this embodiment can cooperate with the two pull wires 3000 of the sheath 2000, so that the distal end of the sheath 2000 is bent in two different directions under the pull of the two pull wires 3000. In this embodiment, each set of drive assemblies 30 cooperates with one winding locking mechanism 20. It can be understood that when the drive assemblies 30 are provided as one group, the winding locking mechanism 20 is provided as one and cooperates with both pull wires 3000; when the drive assemblies 30 are provided as two groups, the winding locking mechanism 20 is provided as two, and each winding locking mechanism 20 cooperates with one pull wire 3000. The sheath bending handle 100 includes a housing 10 , in which the sheath 2000 is inserted. Two pulling wires 3000 extend from the tube section of the sheath 2000 located in the housing 10 and cooperate with one or two winding locking mechanisms 20 .

[0112] When the two winding locking mechanisms 20 are respectively coordinated with the two pulling wires 3000, the structure of the driving assembly 30 can refer to the structure of the first driving assembly 301 in Example 1, and the structure of the winding locking mechanism 20 can refer to the structure of the first winding locking mechanism 201 in Example 1. In this embodiment, the two winding locking mechanisms 20 are arranged along the axial direction of the sheath tube 2000, and the two pulling wires 3000 extend from different parts of the sheath tube 2000 and respectively cooperate with the two winding wheels 22. The cooperation method of the two pulling wires 3000 and the winding wheels 22 can refer to the cooperation method of the first pulling wire 3001 and the first winding wheel 2201 in Example 1, which will not be repeated here. This embodiment uses two sets of driving assemblies 30 and two winding locking mechanisms 20 to control the two pulling wires 3000, which is convenient for the operator to operate and solves the problem of cumbersome operation of the sheath tube bending handle 100.

[0113] Furthermore, the sheath bending adjustment handle 100 proposed in this embodiment also includes a limiting mechanism 70. There are two limiting mechanisms 70, and the two limiting mechanisms 70 respectively cooperate with the two winding locking mechanisms 20. The specific structure of the limiting mechanism 70 can refer to the specific structure of the first limiting mechanism 701 in Example 1, 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 corresponding traction wire 3000 from loosening and falling off.

[0114] When a winding locking mechanism 20 cooperates with two pulling wires 3000 at the same time, the structure of the driving component 30 can refer to the structure of the second driving component 302 in Example 1, and the structure of the winding locking mechanism 20 can refer to the structure of the second winding locking mechanism 202 in Example 1. In this embodiment, the two pulling wires 3000 extend from the sheath 2000 in opposite directions and are respectively wound in the two winding grooves 221 of the winding locking mechanism 20. The winding wheel 22 pulls the two pulling wires 3000 by rotating in different directions. The cooperation method of the two pulling wires 3000 and the winding wheel 22 can refer to the cooperation method of the second pulling wire 3002 and the third pulling wire 3003 with the second winding wheel 2202 in Example 1, which will not be repeated here. This embodiment utilizes a set of driving components 30 and a winding locking mechanism 20 to simultaneously control two pulling wires 3000, which not only improves the structural compactness of the sheath bending handle 100, but also facilitates the operator's operation, thereby solving the problem of cumbersome operation of the sheath bending handle 100.

[0115] Furthermore, the sheath tube bending adjustment handle 100 proposed in this embodiment also 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 Example 1, which will not be repeated here. In this embodiment, the wire blocking rod 80 is used to cooperate with the pulling wire 3000 wound clockwise on the winding wheel 22 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 Example 1, which will not be repeated here. In this embodiment, the limiting mechanism 70 is used to prevent the winding wheel 22 from excessively rotating, causing one of the two pulling wires 3000 to become loose and fall off, and the other to be torn and broken.

[0116] Example 3

[0117] See also 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, the sheath tube bending handle 100 proposed in this embodiment can cooperate with a pull line 3000 of the sheath tube 2000 to make the distal end of the sheath tube 2000 bend in a set direction under the pull of the pull line 3000. Figure 18 As shown, the sheath bending adjustment handle 100 in this embodiment includes a shell 10, a set of drive components 30 and a winding locking mechanism 20. The sheath 2000 is passed through the shell 10, and the pulling wire 3000 extends from the tube section of the sheath 2000 located in the shell 10 and cooperates with the winding locking mechanism 20.

[0118] 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 coordination between the pull wire 3000 and the winding reel 22 can refer to the coordination between the first pull wire 3001 and the first winding reel 2201 in the first embodiment, which will not be described in detail here. This embodiment uses a set of drive assemblies 30 and a winding locking mechanism 20 to control the pull wire 3000, which is convenient for the operator and solves the problem of cumbersome operation of the sheath bending handle 100.

[0119] Furthermore, if Figure 18 and Figure 19 As shown, the sheath bending handle 100 proposed in this embodiment further 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 pull wire 3000 from loosening and falling off. 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.

[0120] See also Figure 21 In a second aspect, an embodiment of the present invention provides a delivery device 1000. The delivery device 1000 can be used in interventional therapy to deliver implants such as artificial valves, stents, and valve clips 4000. The delivery device 1000 includes at least one sheath 2000 and at least one sheath bending handle 100 according to any of the above-described embodiments. The proximal portion of the sheath 2000 is disposed within the sheath bending handle 100. In this embodiment, the sheath 2000 can be a hollow sheath 2000 with a bendable or manipulable distal end, such as an adjustable sheath 2000 or a shaping sheath 2000. The sheath 2000 is straight or approximately straight when not subjected to bending forces. For example, the sheath 2000 is provided with an adjustable bending section near its distal end. A pull wire 3000 is connected to the adjustable bending section. The sheath bending handle 100 bends the distal end of the sheath 2000 by pulling the pull wire.

[0121] Exemplarily, the delivery device 1000 includes a primary sheath 2000 and a secondary sheath 2000, wherein the secondary sheath 2000 can be inserted into the primary sheath 2000, and the implant can be connected to the distal end of the secondary sheath 2000. The primary sheath 2000 is provided with a pull line 3000, and the proximal portion of the primary sheath 2000 is inserted into a sheath bending handle 100, and 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 pull lines 3000, and the proximal portion of the secondary sheath 2000 is inserted into another sheath bending handle 100, and the distal end of the secondary sheath 2000 can be bent in three directions under the control of the sheath bending handle 100, thereby delivering the implant to a set position in the patient's body. This embodiment does not specifically limit the number of sheaths 2000 and sheath bending handles 100, and they can be set according to actual conditions. The delivery device 1000 proposed in this embodiment has the same advantages as the sheath bending handle 100 proposed in the above embodiment, which will not be described in detail here.

[0122] See also Figure 22 According to a third aspect of the present invention, an embodiment of the present invention provides a valve repair system 5000. The valve repair system 5000 includes a valve clip 4000 and a delivery device 1000 according to the embodiment of the second aspect. The delivery device 1000 is used to deliver the valve clip 4000, and the distal end of the sheath 2000 is detachably connected to the valve clip 4000. For example, the delivery device 1000 includes multiple sheaths 2000 and multiple 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, thereby delivering the valve clip 4000 to a set position. In addition, the valve repair system 5000 also includes a drive component for controlling the valve clip 4000. The drive component is disposed in the sheath 2000 and is detachably connected to the valve clip 4000. The valve repair system 5000 proposed in this embodiment has the same advantages as the sheath bending handle 100 and the delivery device 100 proposed in the above embodiment, and will not be described in detail here.

[0123] In an optional embodiment, the valve repair system 5000 includes a valve clamp 4000, a primary sheath, a secondary sheath, a tertiary sheath and a delivery device 1000, wherein the delivery device 1000 includes a first sheath bending handle and a second sheath bending handle, wherein the structure of the first sheath bending handle 100 can refer to the structure of the sheath bending handle 100 proposed in Example 3 of the first aspect embodiment, and is used to perform unidirectional bending of the primary sheath, and the structure of the second sheath bending handle can refer to the structure of the sheath bending handle 100 proposed in Example 1 of the first aspect embodiment. The structure is used to bend the secondary sheath in three directions. The distal end of the tertiary sheath is detachably connected to the valve clamp. On this basis, the secondary sheath is inserted into the primary sheath and comes out from the distal end. The tertiary sheath is inserted into the secondary sheath and comes out from the distal end. During the operation of the valve repair system 5000, the bending of the primary sheath drives the secondary and tertiary sheaths to bend at the same time. The bending of the secondary sheath drives the bending of the tertiary sheath, thereby driving the valve clamp 4000 to reach the set position, and can drive it to fine-tune its position in the process of clamping the valve by the valve clamp 4000 until the clamping is completed.

[0124] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sheath bending handle, characterized in that: include: a housing, wherein the housing is provided with a sheath tube channel for allowing the sheath tube portion to pass through the housing; At least one wire winding locking mechanism, the wire winding locking mechanism is arranged in the housing, the wire winding locking mechanism comprises a main shaft and a winding wheel, the outer wheel wall of the winding wheel is provided with at least one winding groove along the circumferential ring, the winding wheel is used to receive and connect the traction wire of the sheath tube, the traction wire is partially wound around the winding groove after extending from the sheath tube, and the winding wheel can pull the traction wire when rotating in a set direction, so that the distal end of the sheath tube is bent in a set direction; and at least one of the winding wheels is provided with two winding grooves, two traction wires arranged opposite to each other in the sheath tube can be wound around the two winding grooves in opposite directions respectively, and the winding wheel is configured to pull one of the traction wires by rotating clockwise and pull the other traction wire by rotating counterclockwise; At least one set of drive components, each set of drive components cooperates with one of the winding locking mechanisms, the drive components include a knob, a worm and a worm wheel connected in sequence, the worm wheel is connected to the main shaft to drive the winding wheel to rotate.

2. The sheath bending handle according to claim 1, characterized in that: The sheath tube bending handle further comprises at least one set of sheath tube fixing components, which are connected to the housing and hold the sheath tube tightly to prevent the sheath tube from moving or rotating.

3. The sheath bending handle according to claim 2, characterized in that: The sheath tube fixing assembly includes two pressure rings arranged opposite to each other, and the two pressure rings are buckled and connected to hold the sheath tube tightly.

4. The sheath bending handle according to claim 2, characterized in that: The sheath fixing assembly includes a fixed flange, a retractable component and an abutment. The fixed flange cooperates with the sheath channel. The retractable component and the abutment are arranged in the center hole of the fixed flange. The retractable component is sleeved on the sheath. The abutment abuts against the retractable component so that the retractable component can shrink and hold the sheath tightly.

5. The sheath bending handle according to claim 1, characterized in that: The winding wheel is provided with at least one group of intersecting and connected wire through holes and wire locking holes in a direction perpendicular to the axial direction. The part of the pulling wire close to the end is arranged in the wire through hole. The winding locking mechanism also includes a wire pressing component, which is arranged in the wire locking hole and presses the pulling wire.

6. The sheath bending handle according to claim 5, characterized in that: The winding groove can accommodate a partial section of the sheath tube, and the bottom surface of the winding groove is in contact with and / or has a shape matching the side wall of the sheath tube.

7. The sheath bending handle according to claim 1, characterized in that: The outer wheel wall of the winding wheel is also provided with a sheath avoidance groove. Along the axial direction of the winding wheel, the sheath avoidance groove is located between the two winding grooves and can accommodate a partial section of the sheath tube. The bottom surface of the sheath avoidance groove is in contact with the side wall of the sheath tube and / or its shape is consistent with that of the sheath tube.

8. The sheath bending handle according to claim 1, characterized in that: The sheath bending handle also includes a wire blocking rod, which is arranged at the angle between the sheath and the winding wheel. The wire blocking rod abuts against the pulling wire wound in a clockwise direction, and is used to prevent the pulling wire from moving in a direction away from the angle when the pulling wire is pulled.

9. The sheath bending handle according to claim 1, characterized in that: The sheath bending adjustment handle further includes a plurality of bearings, and both ends of the main shaft and both ends of the worm are respectively connected to the housing through the bearings.

10. The sheath bending handle according to claim 1, characterized in that: The sheath bending handle further comprises at least one limiting mechanism, which is installed in the housing and is used to limit the winding wheel from rotating within a set range and / or in a set direction.

11. The sheath bending handle according to claim 10, characterized in that: The limiting mechanism includes a rotating member and at least one limiting plate. The rotating member is vertically connected to the main shaft. The end of the rotating member extends toward the limiting plate and can abut against the limiting plate.

12. The sheath bending handle according to claim 1, characterized in that: The sheath bending handle further includes at least one pointer for indicating a rotation angle, and the pointer is disposed outside the housing and connected to the end of the main shaft.

13. The sheath bending handle according to claim 1, characterized in that: The sheath bending adjustment handle further includes a gear set, which is disposed in the housing and is respectively connected to the knob and the worm gear.

14. The sheath bending handle according to any one of claims 1 to 13, characterized in that: The sheath bending handle includes two winding locking mechanisms and two groups of drive components. Each group of drive components cooperates with one winding locking mechanism. The two knobs of the two groups of drive components are respectively located on both sides of the shell.

15. A conveying device, characterized in that: The invention comprises at least one sheath tube and at least one sheath tube bending handle according to any one of claims 1 to 14, wherein the portion of the sheath tube close to the proximal end is passed through the sheath tube bending handle.

16. A valve repair system, characterized in that: It comprises a valve clip and a delivery device according to claim 15, wherein the delivery device is used to deliver the valve clip, and the distal end of the sheath is detachably connected to the valve clip.

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