A handle for adjusting the bending of sheath tube

Abstract

The present invention discloses a handle for adjusting the bending of a sheath tube, comprising a shell; a bending adjustment component, comprising a pull wire, and a rotatably connected adjustment member and a movable component, wherein the distal end of the pull wire is used to connect to the distal end of the sheath tube; a movable component fixedly connected to the proximal end of the pull wire, and when the adjustment member rotates, the movable component can drive the proximal end of the pull wire to move axially along the handle; a sealing fixed component, connected to the proximal end of the shell, and provided with an air hole for an external infusion tube; a rotating component rotatably connected to the sealing fixed component, a sealed cavity connected to the air hole is formed between the rotating component and the sealing fixed component, the rotating component comprises a cavity and at least one through hole connected to the cavity, and the cavity is sealed and connected to the sheath tube; within the rotation stroke of the rotating component relative to the sealing fixed component, the relative position of the air hole and the shell in the circumferential direction of the handle is fixed. The air hole and the external infusion tube of the present invention can maintain a constant circumferential relative position with the shell during surgery, which is conducive to shortening the emptying time during surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a handle for bending a sheath tube. Background Art

[0002] Nowadays, heart valve diseases are receiving more and more attention, and treatment methods are also gradually developing. Among them, compared with traditional surgical treatment, interventional treatment has become the main development direction due to its advantages of less trauma and faster recovery. Interventional treatment mainly uses a catheter to directly reach the site of valve disease with the cooperation of imaging equipment to complete valve repair or replacement. Therefore, a control handle is required to achieve precise operation and delivery of the catheter.

[0003] During valve surgery, the distal end of the sheath is often adjusted to the treatment position by rotating the handle, but most of the existing technologies fix the infusion tube and the handle together. For example, in patent CN214286246U, the position of the infusion tube will change during the operation when the handle is rotated to adjust the distal end of the sheath to the treatment position, and it cannot be guaranteed to always point upward during the operation; and in the process of introducing other sheaths or replacing the sheath system during the operation, gas will enter the inner cavity of the sheath, and the gas density is less than that of blood, so it will be above the blood. If the infusion tube is not facing upward, when the syringe is connected to the infusion tube for emptying, the blood can only be sucked out first to drive the gas above the blood to flow and thus discharge the gas, resulting in a long emptying time and low emptying efficiency during the operation. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a handle for bending a sheath tube; the technical solution is as follows:

[0005] The present invention provides a handle for adjusting the bending of a sheath tube, comprising:

[0006] a housing for accommodating the proximal end of the sheath;

[0007] The bending adjustment assembly includes a pull wire, a rotatably connected adjusting member, and a moving assembly, wherein the distal end of the pull wire is used to be connected to the distal end of the sheath; the moving assembly is located inside the housing and is fixedly connected to the proximal end of the pull wire. When the adjusting member rotates, the moving assembly can drive the proximal end of the pull wire to move axially along the handle;

[0008] a sealing and fixing assembly detachably fixedly connected to the proximal end of the housing, the sealing and fixing assembly being provided with an air hole for connecting an external infusion tube;

[0009] A rotating component rotatably connected to the sealing and fixing component, a sealed cavity connected to the air hole is formed between the rotating component and the sealing and fixing component, the rotating component includes a cavity and at least one through hole connected to the cavity, the cavity is sealed and connected to the sheath tube, the inner cavity of the sheath tube, the cavity, the through hole, the sealed cavity and the air hole are connected in sequence to form an exhaust channel; within the rotation stroke of the rotating component relative to the sealing and fixing component, the relative positions of the air hole and the shell in the circumferential direction of the handle are fixed.

[0010] Furthermore, the sealing and fixing assembly includes a sealing ring segment, the inner wall of the sealing ring segment is provided with an accommodating groove, and the air hole is located on the groove wall of the accommodating groove;

[0011] The rotating assembly includes a sealing segment, the through hole is opened on the sealing segment, and the sealing ring segment is located on the outer periphery of the sealing segment;

[0012] The outer diameter of the sealing section is smaller than the inner diameter of the circle where the bottom wall of the accommodating groove is located. The sealing cavity is located between the sealing ring section and the sealing section in the circumferential direction of the handle, and the sealing cavity is sealed at both ends in the axial direction.

[0013] Furthermore, a sealing groove is provided on the outer wall of the sealing section, a sealing ring is provided on the sealing groove, and the sealing cavity is sealed in the axial direction by the sealing ring.

[0014] Furthermore, the sealing section includes at least two sealing grooves, at least two sealing grooves are respectively located on both sides of the through hole in the axial direction, and at least two sealing grooves are respectively located on both sides of the air hole in the axial direction.

[0015] Furthermore, the moving assembly includes a moving member and a rotating member that are relatively rotatable, the moving member is rotatably connected to the adjusting member, and one end of the pull wire is connected to the rotating member;

[0016] The rotating member is used for being detachably fixedly connected to the sheath tube. During the rotation of the rotating assembly, the rotating member can rotate synchronously and maintain the relative position of the moving member and the housing fixed.

[0017] Furthermore, the bending adjustment component also includes a limiting guide, which is used to be sleeved on the sheath, and the rotating member is sleeved on the limiting guide. During the rotation of the rotating component, the limiting guide is used to limit the relative rotation between the rotating member and the sheath; during the rotation of the adjusting member, the limiting guide is used to guide the moving direction of the moving component.

[0018] Furthermore, a first limiting portion is provided on the outer wall of the limiting guide member, and a second limiting portion is provided inside the rotating member, and the first limiting portion and the second limiting portion match.

[0019] Furthermore, the bending adjustment assembly also includes a wire locking block, a locking block groove is opened on the rotating part, the wire locking block can be detachably fitted into the locking block groove, and the pull wire passes through the locking block groove and is fixedly connected to the wire locking block.

[0020] Furthermore, the adjusting member is provided with an internal thread, and the outer wall of the moving member is provided with an external thread, and the internal thread cooperates with the external thread.

[0021] Furthermore, the sealing and fixing assembly also includes a fixing piece and a connecting ring segment, the fixing piece is detachably fixedly connected to the proximal end of the shell, and the connecting ring segment is rotatably connected to the rotating assembly; the sealing ring segment is located between the fixing piece and the connecting ring segment.

[0022] Furthermore, the inner wall of the connecting ring segment is provided with a plurality of circumferentially arranged angle grooves, and the rotating assembly includes a first ring segment, which is connected to the proximal end of the sealing segment, and the first ring segment is provided with a plurality of telescopic parts, which can intermittently abut against the angle grooves to limit the rotation step of the rotating assembly and lock the rotating assembly.

[0023] Furthermore, the outer wall of the connecting ring segment is provided with a plurality of scale lines, the rotating assembly includes a second ring segment, and the outer wall of the second ring segment is provided with an angle pointer, which can point to one of the plurality of scale lines when the rotating assembly rotates.

[0024] Furthermore, the rotating assembly further includes a connecting section for communicating with the proximal end of the sheath tube, the connecting section is located at the distal end of the sealing section, and the interior of the connecting section is communicated with the cavity.

[0025] Furthermore, at least one first fixing portion is provided on the outer surface of the fixing element, and at least one second fixing portion is provided on the inner wall of the proximal end of the shell, and at least one first fixing portion is engaged with at least one second fixing portion.

[0026] Furthermore, the moving member moves in coordination with the proximal end of the pull wire through the rotating member, driving the distal end of the sheath to bend; a protruding pointer is provided on the moving member, and the protruding pointer protrudes in a direction away from the center of the moving member;

[0027] The shell is provided with a bending adjustment window, and the side wall of the bending adjustment window is provided with a bending adjustment scale. When the movable part moves relative to the shell, the raised pointer can move with the movable part in the bending adjustment window to point to different bending adjustment scales.

[0028] The implementation of the present invention has the following beneficial effects:

[0029] 1. The present invention arranges the air hole of the external infusion tube on a sealing and fixing assembly that is detachably fixed to the shell, and the rotating assembly is rotatably connected to the sealing and fixing assembly. After the operator positions the air hole and the infusion tube upward, the infusion tube can maintain a constant relative position with the shell when the rotating assembly rotates during the operation, that is, the infusion tube is always facing upward during the operation, which greatly helps to shorten the emptying time during the operation and improve the emptying convenience and efficiency.

[0030] 2. In the bending adjustment assembly of the present invention, the moving assembly includes a moving part and a rotating part. The rotating part is connected to the sheath tube. The rotation of the rotating assembly drives the sheath tube and the rotating part to rotate independently, and the moving part and the rotating part are arranged to rotate relative to each other, which will not drive the moving part and the adjusting part to rotate, thereby preventing the rotating adjusting part and the moving part from self-locking and generating friction, thereby causing the torsional force of the rotating assembly to increase. Especially when the bending angle of the distal end of the sheath tube is too large, the convenience and rotation feel of the rotating assembly are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings used in the embodiments, wherein identical components are denoted by identical reference numerals. It is apparent that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0032] Figure 1 A schematic structural diagram of a handle for bending a sheath tube provided by the present invention;

[0033] Figure 2 A schematic diagram of the assembly structure of a sealing and fixing component and an infusion tube provided by the present invention;

[0034] Figure 3 An exploded view of a sealing fixed assembly and a rotating assembly provided by the present invention;

[0035] Figure 4 An exploded view of a bending adjustment assembly provided by the present invention;

[0036] Figure 5 A schematic diagram of the assembly structure of a sheath tube and a limiting guide member provided by the present invention;

[0037] Figure 6 This is a schematic diagram of the appearance structure of a handle for bending a sheath tube provided by the present invention.

[0038] Among them, the reference numerals in the figure correspond to:

[0039] 1-housing, 11-bending window, 12-bending scale, 13-limiting member, 14-tube clamp, 2-sheath, 3-bending assembly, 31-adjusting member, 310-internal thread, 32-moving member, 320-first rotating connection part, 321-external thread, 322-raised pointer, 33-rotating member, 330-second limiting part, 331-locking block groove, 332-second rotating connection part, 34-limiting guide, 340-first limiting part, 35-locking block, 350-first locking part, 351-second locking part, 352-wire hole, 4-sealing fixing assembly , 41-fixing part, 410-first fixing part, 42-sealing ring section, 420-air hole, 421-accommodating groove, 43-connecting ring section, 430-angle slot, 431-scale line, 5-rotating component, 51-connecting section, 510-connecting groove, 52-sealing section, 520-through hole, 521-sealing groove, 522-sealing ring, 53-first ring section, 530-telescopic part, 531-installation part, 54-second ring section, 540-angle pointer, 55-sealing part, 550-sealing pad, 551-sealing cover, 56-cavity, 6-infusion tube. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front", "back", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention, and do not indicate or imply that the device or structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. Moreover, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] In the prior art, some bending sheath handles fix the infusion tube and the handle together, such as patent CN214286246U. During the operation, when the handle is rotated to adjust the distal end of the sheath to the treatment position, the position of the infusion tube will rotate and cannot always face upward, resulting in a long emptying time and low emptying efficiency. In addition, during the rotation of the driving member that drives the sheath to rotate, the inner core and the slider fixed at the proximal end of the sheath will be driven to rotate together, and the outer periphery of the slider has an external thread, which will cooperate with the internal thread of the bending member that controls the movement of the slider along the axis to self-lock, thereby rotating together with the slider. The friction generated by the self-locking will increase the torsional force of the driving member. Especially when the bending angle of the distal end of the sheath is too large, the self-locking force will also increase, affecting the rotation feel of the driving member.

[0042] In order to solve at least one of the technical problems faced by the above-mentioned bending sheath handle, Figure 1 As shown, an embodiment of the present invention provides a handle for adjusting the bending of the sheath tube, comprising a shell 1 for accommodating the proximal end of the sheath tube 2, a sealing and fixing component 4 detachably and fixedly connected to the proximal end of the shell 1, and a rotating component 5 rotatably connected to the sealing and fixing component 4, wherein the interior of the sealing and fixing component 4 is a hollow structure. During the assembly process, the proximal end of the sheath tube 2 can be extended into the interior of the shell 1, and the distal end of the rotating component 5 can pass through the sealing and fixing component 4 along the axial direction of the handle and be fixedly connected to the proximal end of the sheath tube 2, so that under the action of the rotational force of the rotating component 5, the sheath tube 2 is driven to rotate and the circumferential orientation of the bending of the distal end of the sheath tube 2 is adjusted.

[0043] Specifically, if Figure 1 and Figure 2 As shown, the sealing and fixing component 4 is provided with an air hole 420, which is used for an external infusion tube 6 and is optionally provided on the side wall of the sealing and fixing component 4; at the same time, a sealed cavity connected to the air hole 420 is formed between the rotating component 5 and the sealing and fixing component 4, and the rotating component 5 includes a cavity 56 and at least one through hole 520 connected to the cavity 56, and the cavity 56 is located inside the rotating component 5, and the cavity 56 is sealed and connected to the sheath tube 2, and the inner cavity of the sheath tube 2, the cavity 56, the through hole 520, the sealed cavity and the air hole 420 are connected in sequence to form an exhaust channel, and the infusion tube 6 is used for gas discharge to empty the gas entering the inner cavity of the sheath tube 2; within the rotation stroke of the rotating component 5 relative to the sealing and fixing component 4, the relative position of the air hole 420 and the shell 1 in the circumferential direction of the handle is fixed and remains connected to the sealed cavity.

[0044] In this way, after the operator positions the air hole 420 and the infusion tube 6 in the upward direction, that is, after determining the direction of the sealing and fixing component 4, the relative position of the shell 1 and the sealing and fixing component 4 is constant, especially the relative position of the two in the circumferential direction is constant, and the direction of the air hole 420 is also constant. Even if the rotating component 5 rotates during the operation, the sealing and fixing component 4 will not rotate with the rotating component 5, so that the air hole 420 and the infusion tube 6 are always facing upward. Because the gas density is lower than the blood density, the gas in the inner cavity of the sheath tube 2 can pass through the cavity 56 of the rotating component 5, and then preferentially enter the sealed cavity through the through hole 520 that rotates to the top and obliquely above, which is conducive to the discharge of gas from above through the air hole 420 and the infusion tube 6, greatly shortening the emptying time, improving the emptying convenience and efficiency, and the direction of the air hole 420 and the infusion tube 6 remains unchanged with the shell 1 and the sealing and fixing component 4, which is conducive to improving the emptying stability.

[0045] Specifically, if Figure 3 As shown, the sealing and fixing component 4 includes a sealing ring segment 42, and the inner wall of the sealing ring segment 42 is provided with a accommodating groove 421, that is, the inner diameter of the circle where the bottom wall of the accommodating groove 421 is located is larger than the inner diameter of the circle where the side wall of other areas of the sealing and fixing component 4 is located, and the air hole 420 is located on the groove wall of the accommodating groove 421. Correspondingly, the sealing cavity is at least partially located in the area corresponding to the accommodating groove 421 in the axial direction. The gas and blood flowing out through the through hole 520 of the rotating component 5 can flow into the accommodating groove 421 and flow out through the air hole 420 on the groove wall of the accommodating groove 421. The accommodating groove 421 reserves an accommodating space for gas and blood between the sealing and fixing component 4 and the rotating component 5, thereby improving the connectivity reliability of the exhaust channel and helping to improve the emptying reliability and emptying efficiency.

[0046] Specifically, if Figure 3As shown, the rotating assembly 5 includes a sealing segment 52, and a through hole 520 is opened on the sealing segment 52. When the sealing fixing assembly 4 and the rotating assembly 5 are assembled, as the sealing fixing assembly 4 is sleeved on the rotating assembly 5, the sealing ring segment 42 is sleeved on the sealing segment 52, so that the sealing ring segment 42 is located on the outer periphery of the sealing segment 52; and the outer diameter of the sealing segment 52 is smaller than the inner diameter of the circle where the bottom wall of the groove 421 is located, and the sealing cavity is located between the sealing ring segment 42 and the sealing segment 52 in the circumferential direction of the handle, specifically, between the area of the sealing ring segment 42 having the accommodating groove 421 and the sealing segment 52. ; and the sealing cavity is sealed at both ends in the axial direction. In some exemplary embodiments, the sealing ring segment 42 and the sealing segment 52 cooperate to seal the two ends of the sealing cavity in the axial direction; the outer diameter of the sealing segment 52 is relatively small, which is conducive to forming a sealing cavity with a certain accommodating space between the sealing ring segment 42 with the accommodating groove 421 and the sealing segment 52, thereby improving the connectivity and emptying reliability of the exhaust channel. On the other hand, it enables the sealing segment 52 to rotate relative to the sealing ring segment 42, avoiding obstruction of the rotation of the rotating component in an unexpected position, which is conducive to improving the rotation flexibility.

[0047] Specifically, if Figure 3 As shown, in some exemplary embodiments, a sealing groove 521 is provided on the outer wall of the sealing section 52, and a sealing ring 522 is provided on the sealing groove 521. The sealing cavity is sealed in the axial direction by the sealing ring 522, thereby improving the sealing performance of the sealing cavity, preventing gas leakage, and improving the emptying effectiveness, efficiency and reliability; optionally, the sealing ring 522 includes an elastic sealing ring 522 with good sealing performance; in some preferred embodiments, the sealing ring 522 includes an O-ring 522 with good sealing performance, easy assembly and low cost.

[0048] Specifically, if Figure 3 As shown, in some exemplary embodiments, the sealing section 52 includes at least two sealing grooves 521, and the at least two sealing grooves 521 are axially located on both sides of the area where the through hole 520 is located, so that the sealing cavity formed between the sealing grooves 521 remains connected to the through hole 520, and at the same time isolates the through hole 520 and the space on one side of the sealing groove 521 away from the sealing cavity, effectively preventing gas and blood from leaking from the gap between the sealing fixed component 4 and the rotating component 5, effectively improving the sealing reliability and exhaust stability; and at least two sealing grooves 521 are axially located on both sides of the area where the air hole 420 is located, so that the sealing cavity between the sealing grooves 521 remains connected to the air hole 420, thereby improving the exhaust effectiveness, exhaust efficiency and exhaust stability.

[0049] In some optional embodiments, the sealing grooves 521 are both axially located between the two ends of the accommodating groove 421, that is, a sealing groove 521 located at the distal end is located between the distal side wall of the accommodating groove 421 and the air hole 420, and a sealing groove 521 located at the proximal end is located between the proximal side wall of the accommodating groove 421 and the air hole 420, so that the side wall of the sealing section 52 with the through hole 520, the sealing ring 522 on the proximal sealing groove 521, the partial groove wall of the accommodating groove 421 with the air hole 420 and the sealing ring 522 on the distal sealing groove 521 surround and form a sealed cavity, thereby improving the sealing reliability.

[0050] In other exemplary embodiments, the accommodating groove 421 is axially located between the two sealing grooves 521, that is, the proximal side wall of the accommodating groove 421 is axially located between the air hole 420 and a proximal sealing groove 521, and the distal side wall of the accommodating groove 421 is axially located between the air hole 420 and a distal sealing groove 521, so that the side wall of the sealing section 52 with the through hole 520, the sealing ring 522 on the proximal sealing groove 521, the entire groove wall of the accommodating groove 421 with the air hole 420 and the sealing ring 522 on the distal sealing groove 521 surround and form a sealed cavity, thereby improving the sealing reliability.

[0051] In some exemplary embodiments, the rotating assembly 5 includes a through hole 520. During the evacuation process, the rotating assembly 5 can be rotated, and the direction of the through hole 520 can be rotated to face upward or obliquely upward. Then, the gas with relatively low density can enter the sealed cavity through the through hole 520 when the through hole 520 faces upward, thereby improving the effectiveness and stability of gas evacuation. Figure 3 As shown, in other exemplary embodiments, the rotating component 5 includes a plurality of through holes 520, and the gas can be discharged into the sealed cavity through the plurality of through holes 520 facing upward and / or obliquely upward, thereby further accelerating the rate at which the gas is discharged from the rotating component 5 while improving the emptying effectiveness and stability, and also improving the emptying efficiency of the entire handle; in some preferred embodiments, the plurality of through holes 520 are evenly distributed on the side wall of the rotating component 5 along the circumference of the handle, and are further evenly distributed on the side wall of the sealing section 52, to avoid the situation where the gas needs to wait for the rotating component 5 to rotate to a specific rotation angle range before it can be discharged due to the concentration of multiple through holes 520, which is beneficial to further improve the emptying efficiency and emptying stability.

[0052] Specifically, if Figure 3As shown, the sealing and fixing assembly 4 also includes a fixing member 41 and a connecting ring segment 43, the fixing member 41 is located at the distal end of the sealing ring segment 42, the fixing member 41 is detachably fixedly connected to the proximal end of the shell 1, the connecting ring segment 43 is located at the proximal end of the sealing ring segment 42, and the connecting ring segment 43 is rotatably connected to the rotating assembly 5; wherein, the sealing ring segment 42 is located between the fixing member 41 and the connecting ring segment 43, and the accommodating groove 421 is located on the sealing ring segment 42, that is, the accommodating groove 421 is located in the middle section of the sealing and fixing assembly 4, which is beneficial to improving the sealing of the sealing cavity 56 and improving the exhaust reliability. At the same time, it also avoids affecting the connection reliability between the fixing member 41 and the shell 1, and the flexibility of the rotational connection between the connecting ring segment 43 and the rotating assembly 5, which is beneficial to the sealing and fixing assembly 4 to maintain relative stability and immobility with the shell 1 during the rotation of the rotating assembly 5, thereby shortening the exhaust time and improving the exhaust efficiency.

[0053] Specifically, if Figure 3 As shown, the outer surface of the fixing member 41 is provided with at least one first fixing portion 410, and the inner wall of the proximal end of the shell 1 is provided with at least one second fixing portion. The at least one first fixing portion 410 is snap-fitted with the at least one second fixing portion, so that the sealing fixing assembly 4 is fixedly connected to the shell 1 through the fixing member 41. During the rotation of the rotating assembly 5, the sealing fixing assembly 4 can maintain a constant relative position with the shell 1 in the circumferential direction; in some exemplary embodiments, the first fixing portion 410 is a fixing protrusion, and the second fixing portion is a fixing groove. The fixing protrusion and the fixing groove cooperate and snap-fit to fix the fixing member 41 and the proximal end of the shell 1; in other exemplary embodiments, the first fixing portion 410 is a fixing groove, and the second fixing portion is a fixing protrusion. The fixing protrusion and the fixing groove cooperate and snap-fit to fix the fixing member 41 and the proximal end of the shell 1, and limit the relative rotation between the sealing fixing assembly 4 and the shell 1, effectively maintaining the sealing fixing assembly 4 and the air hole 420 in a constant direction during the rotation of the rotating assembly 5, thereby helping to improve the gas exhaust efficiency.

[0054] In some exemplary embodiments, the fixing member 41 is provided with a plurality of first fixing portions 410, and the inner wall of the proximal end of the shell 1 is provided with a plurality of second fixing portions, and at least some of the first fixing portions 410 in the plurality of first fixing portions 410 are clamped with at least some of the second fixing portions in the plurality of second fixing portions; in some preferred embodiments, the first fixing portions 410 and the second fixing portions are clamped one-to-one, and the fixing reliability is good, which can prevent the sealing fixing assembly 4 from rotating relative to the shell 1 to a great extent.

[0055] like Figure 3As shown, in some exemplary embodiments, the outer diameter of the fixing member 41 is less than or equal to the outer diameter of the sealing ring segment 42; in some preferred embodiments, the outer diameter of the fixing member 41 is smaller than the outer diameter of the sealing ring segment 42, so that after installation, the outer diameter of the proximal end of the shell 1 is slightly larger than the outer diameter of the sealing ring segment 42, or the outer surface of the proximal end of the shell 1 can be flush with the outer surface of the sealing ring segment 42, thereby improving the comfort of use of the handle for adjusting the bending sheath tube.

[0056] In some exemplary embodiments, the inner diameter of the fixing member 41 is less than or equal to the inner diameter of the sealing ring segment 42; in some preferred embodiments, the inner diameter of the fixing member 41 is smaller than the inner diameter of the sealing ring segment 42, so that the proximal inner wall of the fixing member 41 can assist in forming the accommodating groove 421, which increases the space of the sealing cavity to a certain extent, is beneficial to improving the emptying reliability and emptying efficiency. In addition, it can also cooperate with the sealing ring 522 to a certain extent to improve the sealing of the sealing cavity.

[0057] Specifically, if Figure 3 As shown, the inner wall of the connecting ring segment 43 is provided with a plurality of angle slots 430 arranged along the circumferential direction, and the rotating assembly 5 includes a first ring segment 53, which is connected to the proximal end of the sealing segment 52, and the first ring segment 53 is provided with a plurality of telescopic members 530, which protrude from the outer surface of the first ring segment 53, and the telescopic members 530 are engaged with the angle slots 430. During the rotation of the rotating assembly 5, the telescopic members 530 can rotate with the rotating assembly 5, enter and exit the plurality of angle slots 430, be continuously compressed and released, and can make a sound. On the one hand, it can be used to limit the rotation step of the rotating component 5 during the rotation process. On the other hand, it can also lock the rotating component 5 when the rotation stops, so as to prevent the rotating component 5 from rotating unexpectedly and affecting the circumferential orientation of the distal bending of the sheath tube 2, and the bending stability is good; in some preferred embodiments, a plurality of telescopic parts 530 are evenly distributed on the first ring segment 53 along the circumference, so that the force between the connecting ring segment 43 and the first ring segment 53 is uniform, the balance of the rotating component 5 during the rotation process is good, and it is also beneficial to improve the feel of the handle.

[0058] Among them, such as Figure 3 As shown, the outer diameter of the first ring segment 53 is larger than the outer diameter of the sealing segment 52, and the outer diameter of the sealing segment 52 is relatively small, which is beneficial to reserving a larger space to form a sealed cavity when assembled with the sealing fixing component 4, so as to facilitate the gas flowing out through the through hole 520 to move upward and discharge the air hole 420. At the same time, the outer diameter of the first ring segment 53 is relatively large, which is also beneficial to prevent the gas and blood flowing into the sealed cavity from leaking in the axial direction; and the outer diameter of the first ring segment 53 is smaller than the inner diameter of the connecting ring segment 43, so as to improve the flexibility of the rotating component 5 relative to the sealing fixing component 4, and also help to improve the accuracy and stability of the rotation step limited by the telescopic part 530 and the angle slot 430.

[0059] like Figure 3 As shown, in some exemplary embodiments, a plurality of mounting portions 531 are provided on the first ring segment 53, and the telescopic member 530 is provided in the mounting portion 531; the mounting portion 531 can be optionally a mounting hole, and the telescopic member 530 includes a shell, a spring and a protrusion, the shell is provided in the mounting hole, the spring is located inside the shell, the protrusion is located on the side of the spring away from the central axis of the rotating component 5, and the protrusion protrudes from the outer surface of the first ring segment 53, and during the rotation of the rotating component 5, the protrusion protruding from the outer surface of the first ring segment 53, that is, the end of the telescopic member 530 can It intermittently abuts against the angle slot 430 on the inner wall of the connecting ring segment 43, and moves in and out of multiple angle slots 430. The corresponding central angles between each two adjacent angle slots 430 are equal (or the corresponding arc lengths are equal), thereby effectively limiting the rotation step during the rotation process, with good controllability and high adjustment accuracy; and when the rotating component 5 stops rotating, the groove walls on both sides of the circumferential direction of the angle slot 430 where the telescopic component 530 is located can effectively limit the circumferential movement of the telescopic component 530, thereby effectively limiting the abnormal rotation of the rotating component 5, and having good locking stability.

[0060] Specifically, if Figure 3 As shown, the outer wall of the connecting ring segment 43 is provided with a plurality of scale lines 431, the rotating component 5 includes a second ring segment 54, and the outer wall of the second ring segment 54 is provided with an angle pointer 540, which can protrude from the outer surface of the second ring segment 54, and the angle pointer 540 can point to one of the plurality of scale lines 431 when the rotating component 5 rotates. The rotating component 5 is connected to the sheath tube 2 and can drive the sheath tube 2 to rotate. Then the angle pointer 540 can indicate the circumferential orientation of the distal bend of the sheath tube 2, with the upward infusion tube 6 as the starting rotation point, and the scale line 431 pointed to by the angle pointer 540 is the angle for rotating the rotating component 5 left and right. The degree of visualization of the rotation process is good, which is conducive to improving the adjustment accuracy; in addition, the plurality of scale lines 431 are corresponding to the plurality of angle slots 430, which can further cooperate with the movement of the telescopic part 530 between the plurality of angle slots 430 to improve the adjustment accuracy and adjustment stability.

[0061] Among them, such as Figure 3As shown, the second ring segment 54 is fixedly connected to the proximal end of the first ring segment 53, and the outer diameter of the second ring segment 54 is larger than the outer diameter of the first ring segment 53, which makes it easier for the operator to contact the outer surface of the second ring segment 54 to apply rotational force to the rotating component 5; in some exemplary embodiments, the outer diameter of the second ring segment 54 is equal to the outer diameter of the connecting ring segment 43, which is beneficial to improving the accuracy of the angle pointer 540 pointing to the scale line 431, reducing the possibility of visual errors by the operator, and improving the reliability of adjustment; in addition, in some exemplary embodiments, the outer surface of the second ring segment 54 is provided with a plurality of ridges or grooves extending in the axial direction to increase the friction between the outer surface of the second ring segment 54 and the operator's fingers, thereby improving the stability and reliability of the rotation of the rotating component 5.

[0062] like Figure 3 As shown, in some exemplary embodiments, the rotating assembly 5 further includes a sealing portion 55, which is sealingly connected to the proximal end of the second ring segment 54 to seal the cavity 56 at the proximal end of the rotating assembly 5 to prevent leakage of gas and blood in the cavity 56; optionally, the sealing portion 55 includes a sealing gasket 550 and a sealing cover 551, the sealing gasket 550 is disposed in the cavity 56, and the sealing cover 551 is connected to the proximal end of the second ring segment 54 to fix the sealing gasket 550 to achieve sealing of the proximal end of the rotating assembly 5; optionally, the sealing portion 55 is an integral sealing back gasket, which can be sealingly connected to the proximal end of the second ring segment 54; optionally, the proximal end of the second ring segment 54 is a closed structure.

[0063] Specifically, if Figure 3 As shown, the rotating assembly 5 also includes a connecting section 51 for communicating with the proximal end of the sheath tube 2, and can pass through the sealing and fixing assembly 4 to connect with the proximal end of the sheath tube 2 during the assembly process. The connecting section 51 is located at the distal end of the sealing section 52, and the interior of the connecting section 51 is connected with the cavity 56, so that the inner cavity of the sheath tube 2 and the cavity 56 of the rotating assembly 5 are connected through the interior of the connecting section 51, which facilitates the gas in the inner cavity of the sheath tube 2 to enter the cavity 56 through the interior of the connecting section 51 during the emptying process, thereby improving the convenience of subsequent emptying; in some exemplary embodiments, the connecting section 51 is sleeved on the proximal end of the sheath tube 2, so that the inner cavity of the sheath tube 2 is connected with the cavity 56 of the rotating assembly 5 through the interior of the connecting section 51; in other exemplary embodiments, the inner wall of the connecting section 51 is used for detachable and fixed connection with the proximal end of the sheath tube 2, and the fixation is flexible and convenient.

[0064] Among them, Figure 3As shown, the outer diameter of the connecting segment 51 is smaller than the outer diameter of the sealing segment 52, and the inner diameter of the inner cavity of the sheath tube 2 is smaller than the inner diameter of the sealing segment 52; in some exemplary embodiments, the inner diameters of the sealing segment 52, the first ring segment 53 and the second ring segment 54 can be selected to be equal or unequal, and the inner diameters of the sealing segment 52, the first ring segment 53 and the second ring segment 54 are all larger than the inner diameter of the connecting segment 51, so that during the intraoperative emptying process, the relative height of the through hole 520 is higher than the inner cavity of the sheath tube 2 and the inside of the connecting segment 51, which facilitates the movement of gas with lower density from the inner cavity of the sheath tube 2 into the cavity 56, and moves to the sealing cavity through the relatively higher position of the through hole 520, and finally moves to the sealing cavity through the upward gas The hole 420 and the infusion tube 6 discharge handle greatly improve the convenience and efficiency of emptying; in addition, in some exemplary embodiments, the inner diameter of the sealing segment 52 is greater than or equal to the inner diameter of the first ring segment 53, and the inner diameter of the sealing segment 52 is greater than or equal to the inner diameter of the second ring segment 54, so that the relative height of the sealing segment 52 and the through hole 520 is the highest, and the gas density is lower, it will be easier to gather in the area corresponding to the inner wall of the sealing segment 52, and then be quickly discharged through the through hole 520, which is beneficial to improving the reliability and efficiency of the gas discharge cavity 56; in some preferred embodiments, the inner diameters of the sealing segment 52, the first ring segment 53 and the second ring segment 54 are equal.

[0065] Specifically, if Figure 3 As shown, a connecting groove 510 is provided on the outer wall of the connecting section 51; correspondingly, a limit member 13 is provided on the inner side of the proximal end of the shell 1, and the limit member 13 is rotatably connected to the connecting groove 510 to avoid hindering the rotation of the rotating component 5 relative to the shell 1. At the same time, the limit member 13 can cooperate with the connecting groove 510 to limit the relative position of the rotating component 5 in the axial direction, that is, to prevent the rotating component 5 from moving axially during the rotation process, thereby improving the rotation stability of the rotating component 5; in some exemplary embodiments, the limit member 13 includes a retaining ring, and during the rotation of the rotating component 5, the connecting groove 510 will be stuck by the retaining ring provided on the inner wall of the proximal end of the shell 1, so that the rotating component 5 can only rotate circumferentially but not move axially.

[0066] Specifically, if Figure 1 As shown, the handle also includes a bending adjustment component 3, which is used to adjust the bending angle of the distal end of the sheath tube 2; the handle drives the sheath tube 2 to rotate through the rotating component 5 to adjust the circumferential orientation of the bending of the distal end of the sheath tube 2, and cooperates with the bending adjustment component 3 to adjust the bending angle of the distal end of the sheath tube 2, so that the distal end of the sheath tube 2 can be accurately aligned with the treatment position, thereby improving the bending accuracy and reliability of the distal end of the sheath tube 2.

[0067] Among them, such as Figure 1As shown, the bending adjustment assembly 3 includes a pull wire, an adjusting member 31 and a moving assembly, the distal end of the pull wire is used to connect with the distal end of the sheath 2; the moving assembly is located inside the shell 1, and the moving assembly is fixedly connected to the proximal end of the pull wire, the adjusting member 31 is rotatably connected to the moving assembly, the adjusting member 31 rotates to drive the moving assembly to move axially along the handle, and the moving assembly can drive the proximal end of the pull wire to move axially along the handle, thereby driving the distal end of the pull wire to move, and at the same time driving the distal end of the sheath 2 connected to the distal end of the pull wire to bend, thereby changing the bending angle of the distal end of the sheath 2.

[0068] like Figure 1 As shown, in some optional embodiments, the adjusting member 31 is located in the middle section of the shell 1 in the axial direction of the handle, and can rotate relative to the shell 1, driving the moving component rotatably connected to the adjusting member 31 to move along the axial direction of the handle, which is beneficial to improving the feel during adjustment; in some optional embodiments, the adjusting member 31 may include a knob, which is easy to set up and flexible and reliable to rotate; in some exemplary embodiments, the adjusting member 31 is a split structure, that is, the adjusting member 31 includes a first adjusting part and a second adjusting part, and the first adjusting part and the second adjusting part are detachably connected to improve assembly convenience.

[0069] like Figure 1 As shown, the interior of the bending adjustment component 3 is a hollow structure, the adjusting part 31 is located on the shell 1, and the adjusting part 31 is rotatably connected to the shell 1, and the interior of the moving component is also a hollow structure, which can allow the proximal end of the sheath tube 2 to pass through and connect with the distal end of the rotating component 5, thereby realizing the communication between the inner cavity of the sheath tube 2 and the cavity 56 of the rotating component 5.

[0070] Specifically, if Figure 4 As shown, the moving assembly includes a moving part 32 and a rotating part 33 that are arranged to rotate relative to each other. The moving part 32 is rotationally connected to the adjusting part 31, and the moving part 32 and the shell 1 will not rotate relative to each other. One end of the pull wire is connected to the rotating part 33; the rotating part 33 is used to be detachably fixedly connected to the sheath tube 2. During the rotation of the rotating assembly 5, the rotating part 33 can rotate synchronously and maintain the relative position of the moving part 32 and the shell 1 fixed.

[0071] In this way, in the process of adjusting the direction of the distal end of the sheath tube 2, the rotating assembly 5 drives the sheath tube 2 and the rotating member 33 detachably fixedly connected to the sheath tube 2 to rotate, and the rotating member 33 and the movable member 32 are arranged to rotate relative to each other. The rotation of the rotating member 33 does not drive the movable member 32 to rotate, and the adjusting member 31 remains stationary in the absence of external human force, thereby avoiding the relative rotation trend between the movable member 32 and the adjusting member 31 during the rotation of the rotating assembly 5 and generating self-locking friction, thereby reducing the torsional force of the rotating assembly 5, especially when the bending angle of the distal end of the sheath tube 2 is large, reducing the rotation difficulty of the rotating assembly 5 and improving the rotation feel of the rotating assembly 5.

[0072] In the process of adjusting the bending angle of the distal end of the sheath tube 2, the movable member 32 is non-rotatable relative to the shell 1, and the adjusting member 31 rotates, driving the movable member 32 and the rotating member 33 in the movable assembly to move axially together, and the pull wire connected to the rotating member 33 at the proximal end can also move axially along the handle during the rotation of the adjusting member 31, driving the distal end of the sheath tube 2 connected to the distal end of the pull wire to bend to varying degrees, thereby realizing the adjustment of the bending angle of the distal end of the sheath tube 2.

[0073] Specifically, if Figure 1 and Figure 5 As shown, the bending adjustment component 3 also includes a limiting guide 34, which is used to be sleeved on the sheath tube 2, and the rotating member 33 is sleeved on the limiting guide 34. During the rotation of the rotating component 5, the limiting guide 34 is used to limit the relative rotation between the rotating member 33 and the sheath tube 2, that is, the rotating member 33 and the sheath tube 2 will not rotate relative to each other. When the rotating component 5 is driven, it can drive the sheath tube 2, the limiting guide 34 and the rotating member 33 to rotate together, but the relative rotation between the rotating member 33 and the moving member 32 will not drive the moving member 32 to rotate. The self-locking of the rotating component 5 is effectively prevented by the rotation between the movable component 32 and the adjusting component 31 during the rotation, thereby reducing the difficulty of twisting the rotating component 5 and improving the rotation convenience and rotation feel of the rotating component 5; and, during the rotation of the adjusting component 31, the limiting guide 34 is used to guide the moving direction of the movable component, so that the movable component 32 and the rotating component 33 can be translated together along the guiding direction of the limiting guide 34, that is, move along the axial direction of the handle, thereby improving the effectiveness and smoothness of the bending adjustment of the adjusting component 31.

[0074] Specifically, if Figure 4 and Figure 5 As shown, a first limiting portion 340 is provided on the outer wall of the limiting guide 34, and a second limiting portion 330 is provided inside the rotating member 33. The first limiting portion 340 and the second limiting portion 330 are matched so that the limiting guide 34 and the rotating member 33 can rotate synchronously, and the limiting guide 34 is sleeved on the outer wall of the sheath 2, so that the sheath 2, the limiting guide 34 and the rotating member 33 can rotate synchronously or not rotate synchronously, and the connection reliability is good.

[0075] like Figure 4 and Figure 5As shown, in some exemplary embodiments, the first limiting portion 340 includes a plurality of limiting protrusions, which protrude from the outer surface of the limiting guide 34 and extend axially. Correspondingly, the second limiting portion 330 includes a plurality of limiting grooves, which are located on the inner wall of the rotating member 33. The limiting grooves are recessed in the inner wall surface of the rotating member 33 and extend axially, so that the limiting protrusions can act as slide rails and limit the relative rotation of the rotating member 33. In other exemplary embodiments, the first limiting portion 340 includes a plurality of limiting grooves, and the second limiting portion 330 includes a plurality of limiting protrusions, which are engaged with the limiting grooves and extend axially. In this way, the engagement of the limiting protrusions with the limiting grooves effectively limits the relative rotation between the limiting guide 34 and the rotating member 33 on the one hand, and avoids hindering the axial translation of the rotating member 33 during the rotation of the adjusting member 31 on the other hand, which is beneficial to improving the stability and reliability of the handle bending performance.

[0076] Specifically, if Figure 4 As shown, one end of the moving member 32 is provided with a first rotating connection portion 320, and one end of the rotating member 33 is provided with a second rotating connection portion 332. The first rotating connection portion 320 and the second rotating connection portion 332 are rotatably connected so that the rotating member 33 can rotate relative to the moving member 32; in some exemplary embodiments, the proximal end of the moving member 32 is provided with the first rotating connection portion 320 and the distal end of the rotating member 33 is provided with the second rotating connection portion 332, or the distal end of the moving member 32 is provided with the first rotating connection portion 320 and the proximal end of the rotating member 33 is provided with the second rotating connection portion 332; in some exemplary embodiments, the first rotating connection portion 320 includes a ridge protruding from the circumferential surface of the moving member 32, and the second rotating portion includes a groove recessed in the circumferential surface of the rotating member 33, and the ridge and the groove cooperate to enable relative rotation between the moving member 32 and the rotating member 33; in other exemplary embodiments, the first rotating connection portion 320 includes a groove recessed in the circumferential surface of the movable part 32, and the second rotating part includes an edge protruding from the circumferential surface of the rotating part 33; in some preferred embodiments, the edges and grooves are each evenly arranged along the circumference, which is beneficial to improving the matching balance and stability; in some exemplary embodiments, the first rotating connection part 320 is arranged on the outer wall of one end of the movable part 32 and the second rotating connection part 332 is arranged on the inner wall of one end of the rotating part 33, or the first rotating connection part 320 is arranged on the inner wall of one end of the movable part 32 and the second rotating connection part 332 is arranged on the outer wall of one end of the rotating part 33, so that the first rotating connection part 320 and the second rotating connection part 332 can effectively realize relative rotation; the arrangement is flexible and convenient, and the rotation stability and reliability are good; in addition, structures that can realize effective relative rotation between the first rotating connection part 320 and the second rotating connection part 332 are within the protection scope of the present invention.

[0077] Specifically, if Figure 4 As shown, the bending adjustment component 3 also includes a wire locking block 35, and a locking block groove 331 is provided on the rotating part 33. The wire locking block 35 can be detachably engaged in the locking block groove 331. The pull wire passes through the locking block groove 331 and is fixedly connected to the wire locking block 35 to effectively lock the proximal end of the pull wire, thereby improving the reliability and stability of the fixation of the pull wire and the bending adjustment component 3, and improving the overall reliability of the handle for the bending adjustment sheath.

[0078] like Figure 4 As shown, in some exemplary embodiments, the wire locking block 35 includes a first wire locking portion 350 and a second wire locking portion 351, wherein the first wire locking portion 350 is placed in the locking block groove 331, and the second wire locking portion 351 is detachably connected to the first wire locking portion 350, and the proximal end of the pull wire is clamped between the first wire locking portion 350 and the second wire locking portion 351 through the locking block groove 331, further improving the connection firmness between the proximal end of the pull wire and the rotating member 33; for example, in some specific embodiments, the first wire locking portion 350 includes a wire locking nut, and the second wire locking portion 351 includes a wire locking top screw, and the wire locking nut and the wire locking top screw are threadedly connected, so that the pull wire can be effectively fixed when the two are tightened, thereby improving the fixation reliability of the proximal end of the pull wire and the wire locking block 35.

[0079] like Figure 4 As shown, in some exemplary embodiments, the inner wall of the rotating member 33 has a certain thickness, and a wire hole 352 is further provided on the inner wall of the rotating member 33. The wire hole 352 is connected to the wire locking groove for allowing the pull wire to pass through and enter the wire locking groove, and then lock with the wire locking block 35, thereby improving the reliability of the pull wire locking.

[0080] like Figure 4 As shown, in some exemplary embodiments, the rotating member 33 is a split structure, that is, the rotating member 33 includes a first rotating block and a second rotating block, and the first rotating block and the second rotating block are detachably connected to improve assembly convenience; wherein, the locking block groove 331 and the locking line block 35 can be set on the first rotating block or the second rotating block, and the setting is flexible.

[0081] Specifically, if Figure 4 As shown, the adjusting member 31 and the moving member 32 are threadedly connected, the adjusting member 31 is provided with an internal thread 310, and the outer wall of the moving member 32 is provided with an external thread 321. The internal thread 310 cooperates with the external thread 321, and the moving member 32 is non-rotatable relative to the shell 1, so that the moving member 32 is driven to move axially during the rotation of the adjusting member 31. The threaded connection drive is convenient and reliable.

[0082] Specifically, the moving member 32 moves in coordination with the proximal end of the pull wire through the rotating member 33, driving the distal end of the sheath tube 2 to bend; Figure 4As shown, the center of the moving part 32 is a hollow structure, and a protruding pointer 322 is provided on the moving part 32. The outer peripheral surface of the moving part 32 has a plane area and a threaded area. The external thread 321 is set in the threaded area, and the protruding pointer 322 is set in the plane area, and the protruding pointer 322 protrudes in the direction away from the center of the moving part 32.

[0083] In some exemplary embodiments, the interior of the movable part 32 can be set as a hollow hole with an elliptical circumferential cross-section, the ellipse having a long diameter and a short diameter. Correspondingly, the elliptical circumferential cross-section of the hollow hole has a long diameter and a short diameter. The planar area is set parallel to the axial plane where the long diameter is located, which can make the planar area closer to the center of the hollow hole, which is conducive to the arrangement of a larger planar area in the axial direction, and the raised pointer 322 raises in the direction of the shell 1 in a direction perpendicular to the axial direction. The raised pointer 322 can be selectively set at the proximal end face, distal end face or middle section of the planar area. The setting of the planar area close to the center of the hollow hole also facilitates reserving a certain arrangement space for the raised pointer 322.

[0084] like Figure 6 As shown, the shell 1 is provided with a bending adjustment window 11. When the shell 1 and the bending adjustment component 3 are assembled, the protruding pointer 322 is located in the bending adjustment window 11 in the axial direction, and the protruding pointer 322 passes through the bending adjustment window 11 in the radial direction and protrudes from the outer surface of the bending adjustment window 11; the side wall of the bending adjustment window 11 is provided with a bending adjustment scale 12, and the bending adjustment scale 12 is used to indicate the bending angle of the sheath 2 during the adjustment process. When the moving part 32 moves relative to the shell 1, the protruding pointer 322 can move with the moving part 32 in the bending adjustment window 11. The inner axial movement points to different bending adjustment scales 12, thereby improving the accuracy and visualization of the bending adjustment component 3 in adjusting the distal bending angle of the sheath 2; in addition, in some exemplary embodiments, the protruding pointer 322 extends into the bending adjustment window 11, so that the bending adjustment window 11 can circumferentially limit the protruding pointer 322 and the moving part 32, thereby preventing the moving part 32 from rotating relative to the shell 1 to a certain extent when the adjusting part 31 rotates, and the limitation improves the effectiveness and reliability of the circumferential limitation of the moving part 32.

[0085] In some exemplary embodiments, the housing 1 is a split structure, that is, the housing 1 includes a first shell and a second shell, and the first shell and the second shell are detachably connected to improve assembly convenience.

[0086] In some exemplary embodiments, a tube clamp 14 is provided inside the distal end of the shell 1. The tube clamp 14 has a tube hole for allowing the sheath tube 2 to pass through and restricting the movement of the sheath tube 2 in a direction perpendicular to the axial direction, thereby positioning the sheath tube 2 and preventing the sheath tube 2 from shaking during the bending process and affecting the distal alignment accuracy.

[0087] In combination with the above-mentioned specific embodiment, the emptying process of the handle for bending the sheath includes: the proximal end of the sheath 2 is connected to the connecting section 51 of the rotating component 5, and the blood containing gas will enter the interior of the connecting section 51 from the proximal end of the sheath 2, that is, enter the cavity 56 of the rotating component 5, and the proximal end of the rotating component 5 is sealed by the sealing portion 55, so that the blood containing gas flows out from the through hole 520 on the sealing section 52 that is connected to the cavity 56 and enters the sealed cavity. The gas density is lower than the blood density, and the gas will be above the blood in the sealed cavity. At the same time, the air hole 420 on the sealing fixing component 4 and the external infusion tube 6 can be manually adjusted upward, and can always maintain a constant direction with the shell 1 during the operation, and will not rotate with the rotation of the rotating component 5. The gas located above in the sealed cavity can preferably be sucked away from the infusion tube 6 through the air hole 420, thereby realizing the effective emptying of the gas in the inner cavity of the sheath 2, shortening the emptying time, and improving the emptying convenience, emptying efficiency and emptying stability.

[0088] The operation process of the handle for adjusting the bending sheath tube includes: the rotating component 5 drives the proximal end of the sheath tube 2 connected to the connecting section 51 to rotate, thereby adjusting the circumferential orientation of the bending of the distal end of the sheath tube 2, and at the same time drives the limiting guide 34 and the rotating member 33 to rotate, and the rotating member 33 and the moving member 32 are relatively rotated, so that the moving member 32 does not rotate, thereby preventing the self-locking friction force between the rotating adjustment member 31 and the moving member 32 from increasing due to self-locking, especially when the bending angle of the distal end of the sheath tube 2 is too large, which can avoid the greater self-locking friction force. The influence of torque enables the rotating component 5 to easily drive the sheath 2 to rotate as a whole, thereby improving the convenience and rotation feel of the rotating component 5 in adjusting the circumferential orientation of the bending of the sheath 2; and the adjusting part 31 rotates relative to the shell 1, driving the moving part 32 threadedly connected to the adjusting part 31 and the rotating part 33 that can rotate relative to the moving part 32 to move axially along the limiting guide part 34 sleeved on the sheath 2, and driving the proximal end of the pull wire connected to the rotating part 33 to move axially together, thereby driving the distal end of the pull wire and the distal end of the sheath 2 to bend, thereby realizing the adjustment of the bending angle of the distal end of the sheath 2.

[0089] What is described above are only some embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art should understand that the present invention may be subject to various changes and improvements, and any modifications, equivalent substitutions and improvements made in accordance with the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A handle for bending a sheath tube, characterized in that: include: A housing (1) for accommodating the proximal end of the sheath tube (2); A bending adjustment assembly (3) comprises a pull wire, a rotatably connected adjustment member (31) and a moving assembly, wherein the distal end of the pull wire is used to be connected to the distal end of the sheath tube (2); the moving assembly is located inside the housing (1), and the moving assembly is fixedly connected to the proximal end of the pull wire, and when the adjustment member (31) rotates, the moving assembly can drive the proximal end of the pull wire to move along the axial direction of the handle; A sealing fixing assembly (4) is detachably fixedly connected to the proximal end of the housing (1), the sealing fixing assembly (4) is provided with an air hole (420), and the air hole (420) is used for connecting an external infusion tube; the sealing fixing assembly (4) includes a sealing ring segment (42), and the inner wall of the sealing ring segment (42) is provided with an accommodating groove (421), and the air hole (420) is located on the groove wall of the accommodating groove (421); A rotating assembly (5) is rotatably connected to the sealing and fixing assembly (4), a sealed cavity communicating with the air hole (420) is formed between the rotating assembly (5) and the sealing and fixing assembly (4), the rotating assembly (5) comprises a sealing section (52), a cavity and at least one through hole (520) communicating with the cavity, the through hole (520) is provided on the sealing section (52), the cavity is in sealed communication with the sheath tube (2), the inner cavity of the sheath tube (2), the cavity, the through hole (520), the sealed cavity and the air hole (420) are sequentially connected to form an exhaust passage; within the rotation stroke of the rotating assembly (5) relative to the sealing and fixing assembly (4), the relative positions of the air hole (420) and the housing (1) in the circumferential direction of the handle are fixed; The sealing ring segment (42) is located on the outer periphery of the sealing segment (52); the outer diameter of the sealing segment (52) is smaller than the inner diameter of the circle where the bottom wall of the accommodating groove (421) is located; the sealing cavity is located between the sealing ring segment (42) and the sealing segment (52) in the circumferential direction of the handle, and the sealing cavity is sealed at both ends in the axial direction.

2. The handle for bending the sheath tube according to claim 1, characterized in that: A sealing groove (521) is provided on the outer wall of the sealing section (52), a sealing ring (522) is provided on the sealing groove (521), and the sealing cavity is sealed in the axial direction by the sealing ring (522).

3. The handle for bending the sheath tube according to claim 2, characterized in that: The sealing section (52) comprises at least two sealing grooves (521), and the at least two sealing grooves (521) are respectively located on both sides of the through hole (520) in the axial direction, and the at least two sealing grooves (521) are respectively located on both sides of the air hole (420) in the axial direction.

4. The handle for bending the sheath tube according to claim 1, characterized in that: The moving assembly comprises a moving member (32) and a rotating member (33) which are arranged to rotate relative to each other, the moving member (32) is rotationally connected to the adjusting member (31), and one end of the pull wire is connected to the rotating member (33); The rotating member (33) is used for being detachably fixedly connected to the sheath tube (2). During the rotation of the rotating assembly (5), the rotating member (33) can rotate synchronously and maintain the relative position of the moving member (32) and the housing (1) fixed.

5. The handle for bending the sheath tube according to claim 4, characterized in that: The bending adjustment component (3) further includes a limiting guide (34), the limiting guide (34) being used to be sleeved on the sheath (2), and the rotating member (33) being sleeved on the limiting guide (34). During the rotation of the rotating component (5), the limiting guide (34) is used to limit the relative rotation between the rotating member (33) and the sheath (2); during the rotation of the adjusting member (31), the limiting guide (34) is used to guide the moving direction of the moving component.

6. The handle for bending the sheath tube according to claim 5, characterized in that: A first limiting portion (340) is provided on the outer wall of the limiting guide member (34), and a second limiting portion (330) is provided inside the rotating member (33), wherein the first limiting portion (340) and the second limiting portion (330) match each other.

7. The handle for bending the sheath tube according to claim 4, characterized in that: The bending adjustment assembly (3) further comprises a wire locking block (35), a locking block groove (331) is provided on the rotating member (33), the wire locking block (35) is detachably engaged in the locking block groove (331), and the pull wire passes through the locking block groove (331) and is fixedly connected to the wire locking block (35).

8. The handle for bending the sheath tube according to claim 4, characterized in that: The adjusting member (31) is provided with an internal thread (310), and the outer wall of the moving member (32) is provided with an external thread (321), and the internal thread (310) cooperates with the external thread (321).

9. The handle for bending the sheath according to any one of claims 1 to 8, characterized in that: The sealing fixing assembly (4) further comprises a fixing member (41) and a connecting ring segment (43), wherein the fixing member (41) is detachably fixedly connected to the proximal end of the housing (1), and the connecting ring segment (43) is rotatably connected to the rotating assembly (5); and the sealing ring segment (42) is located between the fixing member (41) and the connecting ring segment (43).

10. The handle for bending the sheath tube according to claim 9, characterized in that: The inner wall of the connecting ring segment (43) is provided with a plurality of angular retaining grooves (430) arranged along the circumferential direction. The rotating assembly (5) comprises a first ring segment (53), the first ring segment (53) being connected to the proximal end of the sealing segment (52), and the first ring segment (53) being provided with a plurality of telescopic members (530), the telescopic members (530) being capable of intermittently abutting against the angular retaining grooves (430) to limit the rotation step length of the rotating assembly (5) and to lock the rotating assembly (5).

11. The handle for bending the sheath tube according to claim 9, characterized in that: The outer wall of the connecting ring segment (43) is provided with a plurality of scale marks (431), and the rotating assembly (5) includes a second ring segment (54). The outer wall of the second ring segment (54) is provided with an angle pointer (540), and the angle pointer (540) can point to one of the plurality of scale marks (431) when the rotating assembly (5) rotates.

12. The handle for bending the sheath tube according to claim 1, characterized in that: The rotating assembly (5) further comprises a connecting section (51) for communicating with the proximal end of the sheath tube (2), the interior of the connecting section (51) being in communication with the cavity.

13. The handle for bending the sheath tube according to claim 9, characterized in that: The outer surface of the fixing member (41) is provided with at least one first fixing portion (410), the inner wall of the proximal end of the housing (1) is provided with at least one second fixing portion, and at least one first fixing portion (410) is engaged with at least one second fixing portion.

14. The handle for bending the sheath tube according to claim 4, characterized in that: The movable member (32) moves in coordination with the proximal end of the pull wire through the rotating member (33), driving the distal end of the sheath tube (2) to bend; a protruding pointer (322) is provided on the movable member (32), and the protruding pointer (322) protrudes in a direction away from the center of the movable member (32); The shell (1) is provided with a bending adjustment window (11), and a side wall of the bending adjustment window (11) is provided with a bending adjustment scale (12). When the movable member (32) moves relative to the shell (1), the raised pointer (322) can move within the bending adjustment window (11) along with the movable member (32) to point to different bending adjustment scales (12).

Images