Handle for bending sheath tube

Abstract

The invention discloses a handle for bending a sheathing canal. The handle comprises a shell, the bending adjusting assembly comprises a pull wire, an adjusting part and a moving assembly, the adjusting part and the moving assembly are rotationally connected, and the far end of the pull wire is used for being connected with the far end of the sheathing canal; the moving assembly is fixedly connected with the near end of the stay wire, and the moving assembly can drive the near end of the stay wire to move in the axial direction of the handle under the condition that the adjusting piece rotates; the sealing and fixing assembly is connected with the near end of the shell and provided with an air hole used for being externally connected with an infusion tube; the rotating assembly is rotationally connected with the sealing and fixing assembly, a sealing cavity channel communicated with the air hole is formed between the rotating assembly and the sealing and fixing assembly, the rotating assembly comprises a cavity and at least one through hole communicated with the cavity, and the cavity is communicated with the sheathing canal in a sealed mode; in the stroke that the rotating assembly rotates relative to the sealing and fixing assembly, the relative positions of the air hole and the shell in the circumferential direction of the handle are fixed. The circumferential relative positions of the air hole and the external infusion tube and the shell can be kept constant in the operation, and the emptying time in the operation can be shortened.

Description

Technical Field

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

[0002] Nowadays, more and more attention has been paid to heart valve diseases, and the 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 quick recovery; interventional treatment mainly completes the repair or replacement of the valve by reaching the valve lesion site directly through a catheter with the cooperation of imaging instruments. Therefore, it is necessary to control a handle to achieve precise operation and delivery of the catheter.

[0003] During valve surgery, the distal end of the sheath tube is often adjusted to the treatment position by rotating the handle. However, in most of the existing technologies, the infusion tube is fixed to the handle. For example, in the patent No. CN214286246U, during the process of rotating the handle to adjust the distal end of the sheath tube to the treatment position during the operation, the position of the infusion tube will change, and it cannot be guaranteed to always face upward during the operation; and during the process of introducing other sheath tubes or replacing the sheath tube system during the operation, gas will enter the inner cavity of the sheath tube. Since the gas density is less than that of blood, it will be above the blood. If the infusion tube does not face upward, during the process of connecting the syringe to the infusion tube for evacuation, only the blood can be aspirated first to drive the gas flow above the blood to discharge the gas, resulting in a long evacuation time and low evacuation 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: A handle for bending a sheath tube provided by the present invention includes: A housing for accommodating the proximal end of the sheath tube; A bending adjustment assembly, including a wire, and an adjusting member and a moving assembly that are rotatably connected. The distal end of the wire is used to be connected to the distal end of the sheath tube; the moving assembly is located inside the housing, and the moving assembly is fixedly connected to the proximal end of the wire. When the adjusting member rotates, the moving assembly can drive the proximal end of the wire to move along the axial direction of the handle; A sealing and fixing assembly, which is detachably and fixedly connected to the proximal end of the housing. The sealing and fixing assembly is provided with an air hole, and the air hole is used to externally connect an infusion tube; A rotating assembly rotatably connected to the sealing and fixing assembly, a sealing cavity communicating with the air hole is formed between the rotating assembly and the sealing and fixing assembly, the rotating assembly includes a cavity and at least one through hole communicating with the cavity, the cavity is hermetically communicated with the sheath tube, and the inner cavity of the sheath tube, the cavity, the through hole, the sealing cavity and the air hole are sequentially communicated to form an exhaust passage; within the stroke of the rotation of the rotating assembly relative to the sealing and fixing assembly, the relative position of the air hole and the housing in the circumferential direction of the handle is fixed.

[0005] Further, the sealing and fixing assembly includes a sealing ring section, a receiving groove is provided on the inner wall of the sealing ring section, and the air hole is located on the groove wall of the receiving groove; The rotating assembly includes a sealing section, the through hole is opened on the sealing section, and the sealing ring section is located on the outer circumference of the sealing section; The outer diameter of the sealing section is smaller than the inner diameter of the circle where the bottom wall of the receiving 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 both ends of the sealing cavity in the axial direction are hermetically provided.

[0006] Further, 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 axially through the sealing ring.

[0007] Further, the sealing section includes at least two of the sealing grooves, at least two of the sealing grooves are respectively located on both sides of the through hole in the axial direction, and at least two of the sealing grooves are respectively located on both sides of the air hole in the axial direction.

[0008] Further, the moving assembly includes a moving member and a rotating member that are relatively rotatably arranged, the moving member is rotatably connected to the adjusting member, and one end of the wire is connected to the rotating member; The rotating member is used for detachably and fixedly connecting with the sheath tube, and 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.

[0009] Further, the bending adjustment assembly further includes a limiting and guiding member, the limiting and guiding member is used for sleeving on the sheath tube, the rotating member is sleeved on the limiting and guiding member, and during the rotation of the rotating assembly, the limiting and guiding member is used for restricting the relative rotation between the rotating member and the sheath tube; during the rotation of the adjusting member, the limiting and guiding member is used for guiding the moving direction of the moving assembly.

[0010] Further, a first limiting portion is provided on the outer wall of the limiting and guiding member, and a second limiting portion is provided inside the rotating member, and the first limiting portion and the second limiting portion are matched.

[0011] Further, the bending adjustment assembly further includes a wire locking block. A locking block groove is formed in the rotating member. The wire locking block is detachably fitted in the locking block groove. The wire passes through the locking block groove and is fixedly connected to the wire locking block.

[0012] Further, 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 is engaged with the external thread.

[0013] Further, the sealing and fixing assembly further includes a fixing member and a connecting ring section. The fixing member is detachably and fixedly connected to the proximal end of the housing. The connecting ring section is rotatably connected to the rotating assembly; the sealing ring section is located between the fixing member and the connecting ring section.

[0014] Further, a plurality of circumferentially arranged angular clamping grooves are formed in the inner wall of the connecting ring section. The rotating assembly includes a first ring section. The first ring section is connected to the proximal end of the sealing section. A plurality of telescopic members are provided on the first ring section. The telescopic members can intermittently abut against the angular clamping grooves to define the rotation step of the rotating assembly and lock the rotating assembly.

[0015] Further, a plurality of scale lines are provided on the outer wall of the connecting ring section. The rotating assembly includes a second ring section. An angular pointer is provided on the outer wall of the second ring section. The angular pointer can point to one of the plurality of scale lines when the rotating assembly rotates.

[0016] Further, 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 inside of the connecting section communicates with the cavity.

[0017] Further, at least one first fixing portion is provided on the outer surface of the fixing member, and at least one second fixing portion is provided on the inner wall of the proximal end of the housing. At least one of the first fixing portions is snap-fitted with at least one of the second fixing portions.

[0018] Further, the moving member and the proximal end of the wire move in cooperation through the rotating member, driving the distal end of the sheath tube 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; A bending adjustment window is formed in the housing, and bending scales are provided on the side wall of the bending adjustment window. During the movement of the moving member relative to the housing, the protruding pointer can move in the bending adjustment window along with the moving member to point to different bending scales.

[0019] Implementing the present invention has the following beneficial effects: 1. In the present invention, the air hole of the external infusion tube is arranged on the sealing and fixing component that is detachably and fixedly connected to the housing, and the rotating component is rotatably connected to the sealing and fixing component. After the operator positions the air hole and the infusion tube upward, the infusion tube can still maintain a constant relative position with the housing when the rotating component rotates during the operation, that is, the infusion tube always faces upward during the operation, which greatly helps to shorten the evacuation time during the operation and improve the evacuation convenience and efficiency.

[0020] 2. In the bending adjustment component of the present invention, the moving component includes a moving part and a rotating part. The rotating part is connected to the sheath tube. The rotation of the rotating component drives the sheath tube and the rotating part to rotate independently, while the moving part is rotatably arranged relative to the rotating part and does not drive the moving part and the adjusting part to rotate, preventing the adjusting part and the moving part in the rotational fit from being self-locked and generating frictional force, thereby preventing the situation where the torsional force of the rotating component increases. Especially when the bending angle of the distal end of the sheath tube is too large, the convenience and rotational feel of the rotating component are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly introduced below, where the same components are denoted by the same reference numerals. Obviously, the drawings described below are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of a handle for bending adjustment of a sheath tube provided by the present invention; Figure 2 It is a schematic assembly structural diagram of a sealing and fixing component and an infusion tube provided by the present invention; Figure 3 It is an exploded view of a sealing and fixing component and a rotating component provided by the present invention; Figure 4 It is an exploded view of a bending adjustment component provided by the present invention; Figure 5 It is a schematic assembly structural diagram of a sheath tube and a limit guiding member provided by the present invention; Figure 6 It is a schematic external structural diagram of a handle for bending adjustment of a sheath tube provided by the present invention.

[0023] Among them, the reference numerals in the drawings correspond to: 1 - Housing, 11 - Bending adjustment window, 12 - Bending adjustment scale, 13 - Limiting member, 14 - Pipe clamp, 2 - Sheath tube, 3 - Bending adjustment assembly, 31 - Adjusting member, 310 - Internal thread, 32 - Moving member, 320 - First rotating connection portion, 321 - External thread, 322 - Protruding pointer, 33 - Rotating member, 330 - Second limiting portion, 331 - Lock block groove, 332 - Second rotating connection portion, 34 - Limiting and guiding member, 340 - First limiting portion, 35 - Wire locking block, 350 - First wire locking portion, 351 - Second wire locking portion, 352 - Wire hole, 4 - Sealing and fixing assembly, 41 - Fixing member, 410 - First fixing portion, 42 - Sealing ring section, 420 - Air hole, 421 - Accommodating groove, 43 - Connecting ring section, 430 - Angle card slot, 431 - Scale line, 5 - Rotating assembly, 51 - Connecting section, 510 - Connecting groove, 52 - Sealing section, 520 - Through hole, 521 - Sealing groove, 522 - Sealing ring, 53 - First ring section, 530 - Telescopic member, 531 - Mounting portion, 54 - Second ring section, 540 - Angle pointer, 55 - Sealing portion, 550 - Sealing gasket, 551 - Sealing cover, 56 - Cavity, 6 - Infusion tube. Detailed implementation

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or structure referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention; moreover, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work belong to the scope of protection of the present invention.

[0025] In the prior art, some bending sheath tube handles fix the infusion tube to the handle. For example, in the patent No. CN214286246U, during the process of rotating the handle during the operation to adjust the distal end of the sheath tube to align with 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 tube to rotate, the inner core and the slider fixed to the proximal end of the sheath tube will be driven to rotate together. Since the outer circumference of the slider has an external thread, it will cooperate with the internal thread of the bending member that controls the axial movement of the slider to cause self-locking, and thus rotate 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 tube is too large, this self-locking force will also increase, affecting the rotation feel of the driving member.

[0026] To solve at least one of the technical problems faced by the above-mentioned bending sheath tube handle, such as Figure 1 As shown, an embodiment of the present invention provides a handle for a bending sheath tube, including a housing 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 housing 1, and a rotating component 5 rotatably connected to the sealing and fixing component 4. Among them, the inside of the sealing and fixing component 4 is a hollow structure. During the assembly process, the proximal end of the sheath tube 2 can extend into the inside of the housing 1, and the distal end of the rotating component 5 can axially pass through the sealing and fixing component 4 along the handle axis and be fixedly connected to the proximal end of the sheath tube 2. Thus, 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 distal end of the sheath tube 2 is adjusted.

[0027] Specifically, as Figure 1 and Figure 2 As shown, the sealing and fixing component 4 is provided with an air hole 420, which is used to connect 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 sealing cavity communicating with the air hole 420 is formed between the rotating component 5 and the sealing and fixing component 4. The rotating component 5 includes a cavity 56 and at least one through hole 520 communicating with the cavity 56. The cavity 56 is located inside the rotating component 5 and is hermetically communicated with the sheath tube 2. The inner cavity of the sheath tube 2, the cavity 56, the through hole 520, the sealing cavity and the air hole 420 are sequentially communicated to form an exhaust passage. The infusion tube 6 is used for discharging gas to evacuate the gas entering the inner cavity of the sheath tube 2. During 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 housing 1 in the circumferential direction of the handle is fixed and remains in communication with the sealing cavity.

[0028] In this way, after the operator positions in the direction with the air hole 420 and the infusion tube 6 facing upward, that is, after determining the orientation of the sealing and fixing component 4, the relative position of the housing 1 and the sealing and fixing component 4 is constant, especially the relative position in the circumferential direction is constant, and the orientation 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 orientation of the air hole 420 and the infusion tube 6 always faces upward. Because the gas density is less 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 pass through the through holes 520 rotated to the directly upward and obliquely upward directions and enter the sealing cavity, which is beneficial to the gas to be discharged from above through the air hole 420 and the infusion tube 6, greatly shortening the evacuation time, improving the evacuation convenience and efficiency, and the orientation of the air hole 420 and the infusion tube 6 remains unchanged with the housing 1 and the sealing and fixing component 4, which is beneficial to improving the evacuation stability.

[0029] Specifically, as Figure 3As shown, the sealing and fixing assembly 4 includes a sealing ring section 42. An accommodation groove 421 is provided on the inner wall of the sealing ring section 42, that is, the inner diameter of the circle where the bottom wall of the accommodation groove 421 is located is greater than the inner diameter of the circle where the side walls of other areas of the sealing and fixing assembly 4 are located. The air hole 420 is located on the groove wall of the accommodation groove 421. Correspondingly, the sealing cavity is at least partially located in the area corresponding to the accommodation groove 421 in the axial direction. The gas and blood flowing out through the through hole 520 of the rotating assembly 5 can flow into the accommodation groove 421 and flow out through the air hole 420 on the groove wall of the accommodation groove 421. The accommodation groove 421 reserves an accommodation space for gas and blood between the sealing and fixing assembly 4 and the rotating assembly 5, improving the connection reliability of the exhaust passage, which is beneficial to improving the evacuation reliability and evacuation efficiency.

[0030] Specifically, as Figure 3 shown, the rotating assembly 5 includes a sealing section 52. The through hole 520 is opened on the sealing section 52. When the sealing and fixing assembly 4 is assembled with the rotating assembly 5, as the sealing and fixing assembly 4 is sleeved on the rotating assembly 5, the sealing ring section 42 is sleeved on the sealing section 52, such that the sealing ring section 42 is located on the outer circumference of the sealing section 52. And, the outer diameter of the sealing section 52 is smaller than the inner diameter of the circle where the bottom wall of the accommodation groove 421 is located. The sealing cavity is located between the sealing ring section 42 and the sealing section 52 in the circumferential direction of the handle, specifically between the area of the sealing ring section 42 having the accommodation groove 421 and the sealing section 52. And the two ends of the sealing cavity are sealed in the axial direction. In some exemplary embodiments, the sealing ring section 42 and the sealing section 52 cooperate to seal the two ends of the sealing cavity in the axial direction. The smaller outer diameter of the sealing section 52, on the one hand, is beneficial to forming a sealing cavity with a certain accommodation space between the sealing ring section 42 having the accommodation groove 421 and the sealing section 52, improving the connection of the exhaust passage and the evacuation reliability. On the other hand, it enables the sealing section 52 to rotate relative to the sealing ring section 42, preventing it from interfering with the rotation of the rotating assembly at an undesired position, which is beneficial to improving the rotation flexibility.

[0031] Specifically, as Figure 3 shown, in some exemplary embodiments, 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. The sealing cavity is sealed in the axial direction by the sealing ring 522, improving the sealing performance of the sealing cavity, preventing gas leakage, and improving the evacuation effectiveness, evacuation efficiency and evacuation 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, convenient assembly and low cost.

[0032] Specifically, as Figure 3As shown, in some exemplary embodiments, the sealing section 52 includes at least two sealing grooves 521. 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 channel formed between the sealing grooves 521 remains in communication with the through hole 520, while isolating the through hole 520 from the space on the side of the sealing groove 521 away from the sealing channel, effectively preventing gas and blood from leaking through the gap between the sealing and fixing assembly 4 and the rotating assembly 5, and effectively improving the sealing reliability and exhaust stability; and the 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 channel between the sealing grooves 521 remains in communication with the air hole 420, improving the exhaust effectiveness, exhaust efficiency and exhaust stability.

[0033] In some alternative embodiments, the sealing grooves 521 are axially located between the two ends of the receiving groove 421, that is, one sealing groove 521 at the distal end is located between the distal sidewall of the receiving groove 421 and the air hole 420, and one sealing groove 521 at the proximal end is located between the proximal sidewall of the receiving groove 421 and the air hole 420, so that the sidewall of the sealing section 52 with the through hole 520, the sealing ring 522 on the proximal sealing groove 521, a part of the groove wall of the receiving groove 421 with the air hole 420 and the sealing ring 522 on the distal sealing groove 521 surround to form a sealing channel, improving the sealing reliability.

[0034] In some other exemplary embodiments, the receiving groove 421 is axially located between the two sealing grooves 521, that is, the proximal sidewall of the receiving groove 421 is axially located between the air hole 420 and one sealing groove 521 at the proximal end, and the distal sidewall of the receiving groove 421 is axially located between the air hole 420 and one sealing groove 521 at the distal end, so that the sidewall 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 receiving groove 421 with the air hole 420 and the sealing ring 522 on the distal sealing groove 521 surround to form a sealing channel, improving the sealing reliability.

[0035] 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 correspondingly, the orientation of the through hole 520 can be rotated to face directly upward or obliquely upward, so that the gas with relatively low density can enter the sealing channel through the through hole 520 when the through hole 520 faces upward, improving the effectiveness and stability of gas evacuation; such as Figure 3As shown, in some other exemplary embodiments, the rotating assembly 5 includes a plurality of through holes 520. Gas can be discharged to the sealing cavity through the plurality of through holes 520 facing directly upward and / or obliquely upward. While improving the evacuation effectiveness and stability, it further speeds up the rate of gas discharging from the rotating assembly 5 and also improves the evacuation efficiency of the entire handle. In some preferred embodiments, the plurality of through holes 520 are evenly distributed along the circumferential direction of the handle on the side wall of the rotating assembly 5, and further evenly distributed on the side wall of the sealing section 52, avoiding the situation where the plurality of through holes 520 are concentrated, resulting in the gas having to wait for the rotating assembly 5 to rotate to a specific rotation angle range before it can be discharged, which is beneficial to further improving the evacuation efficiency and evacuation stability.

[0036] Specifically, as Figure 3 shown, the sealing and fixing assembly 4 further includes a fixing member 41 and a connecting ring section 43. The fixing member 41 is located at the distal end of the sealing ring section 42, and the fixing member 41 is detachably and fixedly connected to the proximal end of the housing 1. The connecting ring section 43 is located at the proximal end of the sealing ring section 42, and the connecting ring section 43 is rotatably connected to the rotating assembly 5. Among them, the sealing ring section 42 is located between the fixing member 41 and the connecting ring section 43, and the accommodating groove 421 is located on the sealing ring section 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 performance of the sealing cavity 56, improving the exhaust reliability. At the same time, it also avoids affecting the connection reliability between the fixing member 41 and the housing 1, and the flexibility of the rotational connection between the connecting ring section 43 and the rotating assembly 5, which is beneficial to maintaining the relative stability between the sealing and fixing assembly 4 and the housing 1 during the rotation of the rotating assembly 5, and thus beneficial to shortening the exhaust time and improving the exhaust efficiency.

[0037] Specifically, as Figure 3 shown, at least one first fixing portion 410 is provided on the outer surface of the fixing member 41, and at least one second fixing portion is provided on the inner wall of the proximal end of the housing 1. At least one first fixing portion 410 is engaged with at least one second fixing portion, so that the sealing and fixing assembly 4 is fixedly connected to the housing 1 through the fixing member 41. During the rotation of the rotating assembly 5, the sealing and fixing assembly 4 can maintain a constant relative position with the housing 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 are engaged with each other to fixedly connect the fixing member 41 and the proximal end of the housing 1. In some 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 are engaged with each other to fixedly connect the fixing member 41 and the proximal end of the housing 1 and limit the relative rotation between the sealing and fixing assembly 4 and the housing 1, effectively maintaining the constant orientation of the sealing and fixing assembly 4 and the air holes 420 during the rotation of the rotating assembly 5, which is beneficial to improving the evacuation efficiency of the gas.

[0038] 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 housing 1 is provided with a plurality of second fixing portions. At least some of the plurality of first fixing portions 410 are snap-connected to at least some of the plurality of second fixing portions; in some preferred embodiments, the first fixing portions 410 and the second fixing portions are snap-connected one by one, with good fixing reliability, and can largely prevent the sealing and fixing assembly 4 from rotating relative to the housing 1.

[0039] As Figure 3 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 section 42; in some preferred embodiments, the outer diameter of the fixing member 41 is less than the outer diameter of the sealing ring section 42, so that the outer diameter of the proximal end of the housing 1 after installation is slightly larger than the outer diameter of the sealing ring section 42, or the outer surface of the proximal end of the housing 1 can be flush with the outer surface of the sealing ring section 42, improving the use comfort of the handle for the bending sheath tube.

[0040] 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 section 42; in some preferred embodiments, the inner diameter of the fixing member 41 is less than the inner diameter of the sealing ring section 42, so that the inner wall of the proximal end of the fixing member 41 can assist in forming the accommodating groove 421, increasing the space of the sealing cavity to a certain extent, which is beneficial to improving the evacuation reliability and evacuation efficiency. In addition, it can also cooperate with the sealing ring 522 to improve the sealing performance of the sealing cavity to a certain extent.

[0041] Specifically, as Figure 3 shown, the inner wall of the connecting ring section 43 is provided with a plurality of angular grooves 430 arranged circumferentially. The rotating assembly 5 includes a first ring section 53, which is connected to the proximal end of the sealing section 52, and a plurality of telescopic members 530 are provided on the first ring section 53. The telescopic members 530 protrude from the outer surface of the first ring section 53, and the telescopic members 530 are snap-connected to the angular grooves 430. During the rotation of the rotating assembly 5, the telescopic members 530 can rotate with the rotating assembly 5, enter and exit among the plurality of angular grooves 430, and are 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 assembly 5 during rotation. On the other hand, it can lock the rotating assembly 5 when the rotation stops, preventing the rotating assembly 5 from rotating undesirably and affecting the circumferential orientation of the bending of the distal end of the sheath tube 2, with good bending stability; in some preferred embodiments, the plurality of telescopic members 530 are circumferentially evenly distributed on the first ring section 53, so that the force between the connecting ring section 43 and the first ring section 53 is uniform, the balance during the rotation of the rotating assembly 5 is good, and it is also beneficial to improve the use feel of the handle.

[0042] Among them, as Figure 3As shown, the outer diameter of the first ring segment 53 is greater than the outer diameter of the sealing segment 52. The relatively small outer diameter of the sealing segment 52 is conducive to leaving a larger space to form a sealing cavity when assembling with the sealing and fixing component 4, facilitating the upward movement of the gas flowing out through the through hole 520 and discharging through the air hole 420. At the same time, the relatively large outer diameter of the first ring segment 53 is also conducive to preventing the leakage of the gas and blood flowing into the sealing cavity in the axial direction; and the outer diameter of the first ring segment 53 is less than the inner diameter of the connecting ring segment 43, so as to improve the flexibility of the rotation of the rotating component 5 relative to the sealing and fixing component 4, and is also conducive to improving the accuracy and stability of the cooperation between the telescopic member 530 and the angle slot 430 to define the rotation step length.

[0043] As Figure 3 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 disposed within the mounting portion 531; the mounting portion 531 may be selected as a mounting hole. The telescopic member 530 includes a housing, a spring, and a protruding portion. The housing is disposed within the mounting hole, the spring is located inside the housing, and the protruding portion is located on the side of the spring away from the central axis of the rotating component 5, and the protruding portion protrudes from the outer surface of the first ring segment 53. During the rotation of the rotating component 5, the protruding portion protruding from the outer surface of the first ring segment 53, that is, the end of the telescopic member 530, can intermittently abut against the angle slot 430 on the inner wall of the connecting ring segment 43 and move in and out of a plurality of angle slots 430. The central angle corresponding to each adjacent two angle slots 430 is equal (or the corresponding arc lengths are equal), so as to effectively define the rotation step length during the rotation process, with good controllability and high adjustment accuracy; and when the rotating component 5 stops rotating, the two side walls in the circumferential direction of the angle slot 430 where the telescopic member 530 is located can effectively limit the circumferential movement of the telescopic member 530, thereby effectively restricting the abnormal rotation of the rotating component 5 and having good locking stability.

[0044] Specifically, as Figure 3 shown, a plurality of scale lines 431 are provided on the outer wall of the connecting ring segment 43. The rotating component 5 includes a second ring segment 54. An angle pointer 540 is provided on the outer wall of the second ring segment 54. The angle pointer 540 can protrude from the outer surface of the second ring segment 54. 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 2 and can drive the sheath 2 to rotate. Then, the angle pointer 540 can indicate the circumferential orientation of the distal end bending of the sheath 2. Taking the upward infusion tube 6 as the starting rotation point, the scale line 431 pointed by the angle pointer 540 is the angle of rotating the rotating component 5 left and right. The visualization degree during the rotation process is good, which is conducive to improving the adjustment accuracy; in addition, the plurality of scale lines 431 and the plurality of angle slots 430 are correspondingly arranged, which can further cooperate with the movement of the telescopic member 530 between the plurality of angle slots 430 to improve the adjustment accuracy and adjustment stability.

[0045] Among them, asFigure 3 As shown, the second ring segment 54 is fixedly connected to the proximal end of the first ring segment 53. The outer diameter of the second ring segment 54 is larger than that of the first ring segment 53, facilitating an operator to contact the outer surface of the second ring segment 54 to apply a rotational force to the rotating assembly 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 errors in the visual results of the operator, and improving the adjustment reliability. In addition, in some exemplary embodiments, the outer surface of the second ring segment 54 is provided with a plurality of ribs or grooves extending axially to increase the friction between the outer surface of the second ring segment 54 and the operator's fingers, and improve the stability and reliability of the rotation of the rotating assembly 5.

[0046] As Figure 3 shown, in some exemplary embodiments, the rotating assembly 5 further includes a sealing portion 55. The sealing portion 55 is hermetically 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 and prevent gas and blood in the cavity 56 from leaking. 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 and achieve the sealing of the proximal end of the rotating assembly 5. Alternatively, the sealing portion 55 is an integral sealed back pad that can be hermetically connected to the proximal end of the second ring segment 54. Alternatively, the proximal end of the second ring segment 54 is a closed structure.

[0047] Specifically, as Figure 3 shown, the rotating assembly 5 further includes a connecting segment 51 for communicating with the proximal end of the sheath tube 2. During the assembly process, it can pass through the inside of the sealing and fixing assembly 4 and be connected to the proximal end of the sheath tube 2. The connecting segment 51 is located at the distal end of the sealing segment 52, and the inside of the connecting segment 51 communicates with the cavity 56, so that the inner cavity of the sheath tube 2 and the cavity 56 of the rotating assembly 5 are communicated through the inside of the connecting segment 51, facilitating the gas in the inner cavity of the sheath tube 2 to enter the cavity 56 through the inside of the connecting segment 51 during the evacuation process and improving the convenience of subsequent evacuation. In some exemplary embodiments, the connecting segment 51 is sleeved on the proximal end of the sheath tube 2 so that the inner cavity of the sheath tube 2 communicates with the cavity 56 of the rotating assembly 5 through the inside of the connecting segment 51. In some other exemplary embodiments, the inner wall of the connecting segment 51 is used for detachably and fixedly connecting to the proximal end of the sheath tube 2, and the fixing is flexible and convenient.

[0048] Among them, as Figure 3As shown, the outer diameter of the connecting section 51 is smaller than that of the sealing section 52, and the inner diameter of the inner cavity of the sheath tube 2 is smaller than that of the sealing section 52; in some exemplary embodiments, the inner diameters of the sealing section 52, the first ring section 53, and the second ring section 54 can be equal or unequal, and the inner diameters of the sealing section 52, the first ring section 53, and the second ring section 54 are all larger than the inner diameter of the connecting section 51, so that during the intraoperative evacuation process, the relative height of the through hole 520 is higher than that of the inner cavity of the sheath tube 2 and the inside of the connecting section 51, facilitating the movement of the gas with a smaller density from the inner cavity of the sheath tube 2 to the cavity 56, and moving to the sealing channel through the position of the through hole 520 with a relatively higher height, and finally discharging from the handle through the upward air hole 420 and the infusion tube 6, greatly improving the evacuation convenience and efficiency; in addition, in some exemplary embodiments, the inner diameter of the sealing section 52 is greater than or equal to the inner diameter of the first ring section 53, and the inner diameter of the sealing section 52 is greater than or equal to the inner diameter of the second ring section 54, so that the relative height where the sealing section 52 and the through hole 520 are located is the highest, and the gas density is relatively low, and it is easier to converge to the corresponding area on the inner wall of the sealing section 52, and then quickly discharge through the through hole 520, which is beneficial to improving the reliability and efficiency of the gas discharging from the cavity 56; in some preferred embodiments, the inner diameters of the sealing section 52, the first ring section 53, and the second ring section 54 are equal.

[0049] Specifically, as Figure 3 shown, a connecting groove 510 is provided on the outer wall of the connecting section 51; correspondingly, a limiting member 13 is provided on the inner side of the proximal end of the housing 1, and the limiting member 13 is rotatably connected to the connecting groove 510 to prevent interfering with the rotation of the rotating assembly 5 relative to the housing 1. At the same time, the limiting member 13 can cooperate with the connecting groove 510 to limit the relative position of the rotating assembly 5 in the axial direction, that is, to prevent the rotating assembly 5 from axially moving during rotation, and improving the rotational stability of the rotating assembly 5; in some exemplary embodiments, the limiting member 13 includes a retaining ring, and during the rotation of the rotating assembly 5, the connecting groove 510 will be caught by the retaining ring provided on the inner wall of the proximal end of the housing 1, so that the rotating assembly 5 can only rotate circumferentially and cannot move axially.

[0050] Specifically, as Figure 1 shown, the handle further includes a bending adjustment assembly 3, and the bending adjustment assembly 3 is used to adjust the bending angle of the distal end of the sheath tube 2; then the handle drives the sheath tube 2 to rotate through the rotation of the rotating assembly 5 to adjust the circumferential orientation of the bending of the distal end of the sheath tube 2, and cooperate with the bending adjustment assembly 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 accurately align with the treatment position, improving the bending accuracy and reliability of the distal end of the sheath tube 2.

[0051] Among them, as Figure 1As shown, the bending adjustment assembly 3 includes a wire, an adjusting member 31, and a moving assembly. The distal end of the wire is used to connect 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 wire. The adjusting member 31 is rotatably connected to the moving assembly. The adjusting member 31 rotates to drive the moving assembly to move along the axial direction of the handle, and the moving assembly can drive the proximal end of the wire to move along the axial direction of the handle, thereby driving the distal end of the wire to move, and at the same time driving the distal end of the sheath tube 2 connected to the distal end of the wire to bend, changing the bending angle of the distal end of the sheath tube 2.

[0052] As Figure 1 shown, in some alternative embodiments, the adjusting member 31 is located in the middle section of the housing 1 in the axial direction of the handle and can rotate relative to the housing 1 to drive the moving assembly 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 alternative embodiments, the adjusting member 31 may include a knob, which is convenient to set and rotates flexibly and reliably. In some exemplary embodiments, the adjusting member 31 is a split structure, that is, the adjusting member 31 includes a first adjusting portion and a second adjusting portion, and the first adjusting portion and the second adjusting portion are detachably connected to improve the assembly convenience.

[0053] As Figure 1 shown, the inside of the bending adjustment assembly 3 is a hollow structure. The adjusting member 31 is located on the housing 1, and the adjusting member 31 is rotatably connected to the housing 1. The inside of the moving assembly is also a hollow structure and can allow the proximal end of the sheath tube 2 to pass through to be connected to the distal end of the rotating assembly 5, so as to realize the communication between the lumen of the sheath tube 2 and the cavity 56 of the rotating assembly 5.

[0054] Specifically, as Figure 4 shown, the moving assembly includes a moving member 32 and a rotating member 33 that are relatively rotatably arranged. The moving member 32 is rotatably connected to the adjusting member 31, and the moving member 32 does not rotate relative to the housing 1. One end of the wire is connected to the rotating member 33. The rotating member 33 is used to be detachably and 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.

[0055] In this way, during the process of adjusting the orientation of the distal end of the sheath tube 2, the rotating assembly 5 drives the sheath tube 2 and the rotating member 33 detachably and fixedly connected to the sheath tube 2 to rotate. The rotating member 33 and the moving member 32 are relatively rotatably arranged. The rotation of the rotating member 33 does not drive the moving member 32 to rotate, and the adjusting member 31 also remains stationary without being externally manually applied with force, avoiding the relative rotation tendency between the moving member 32 and the adjusting member 31 during the rotation of the rotating assembly 5 to generate 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 relatively large, the rotation difficulty of the rotating assembly 5 is reduced, and the rotation feel of the rotating assembly 5 is improved.

[0056] During the process of adjusting the bending angle of the distal end of the sheath tube 2, the moving member 32 is non-rotatable relative to the housing 1. Then, the adjusting member 31 rotates to drive the moving member 32 and the rotating member 33 in the moving assembly to move axially together. Moreover, the wire connected to the proximal end of the rotating member 33 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 wire to bend to different degrees, thereby realizing the adjustment of the bending angle of the distal end of the sheath tube 2.

[0057] Specifically, as Figure 1 and Figure 5 shown, the bending adjustment assembly 3 further includes a limiting and guiding member 34. The limiting and guiding member 34 is used to sleeved on the sheath tube 2, and the rotating member 33 is sleeved on the limiting and guiding member 34. During the rotation of the rotating assembly 5, the limiting and guiding member 34 is used to limit the relative rotation between the rotating member 33 and the sheath tube 2, that is, there is no relative rotation between the rotating member 33 and the sheath tube 2. When driven by the rotating assembly 5, it can drive the sheath tube 2, the limiting and guiding member 34 and the rotating member 33 to rotate together. However, the rotating member 33 and the moving member 32 are relatively rotatably arranged and will not drive the moving member 32 to rotate, effectively preventing the situation of self-locking caused by the rotation of the rotating assembly 5 driving the moving member 32 and the adjusting member 31 to rotate during the rotation process, reducing the torsional difficulty of the rotating assembly 5, and improving the rotation convenience and rotation feel of the rotating assembly 5. And, during the rotation of the adjusting member 31, the limiting and guiding member 34 is used to guide the moving direction of the moving assembly, so that the moving member 32 and the rotating member 33 can move translationally along the guiding direction of the limiting and guiding member 34 together, that is, move axially along the handle, improving the effectiveness and smoothness of the bending adjustment of the adjusting member 31.

[0058] Specifically, as Figure 4 and Figure 5 shown, the outer wall of the limiting and guiding member 34 is provided with a first limiting portion 340, and the inside of the rotating member 33 is provided with a second limiting portion 330. The first limiting portion 340 and the second limiting portion 330 are matched so that the limiting and guiding member 34 and the rotating member 33 can rotate synchronously, and the limiting and guiding member 34 is sleeved on the outer wall of the sheath tube 2, so that the sheath tube 2, the limiting and guiding member 34 and the rotating member 33 can rotate synchronously or not rotate synchronously, and the connection reliability is good.

[0059] As Figure 4 and Figure 5As shown, in some exemplary embodiments, the first limiting portion 340 includes a plurality of limiting protrusions that 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 located on the inner wall of the rotating member 33. The limiting grooves are recessed from the inner wall surface of the rotating member 33 and extend axially, such that the limiting protrusions can function as slide rails while restricting the relative rotation of the rotating member 33. In some 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. The limiting protrusions and the limiting grooves are engaged and both extend axially. Thus, the engagement between the limiting protrusions and the limiting grooves effectively restricts the relative rotation between the limiting guide 34 and the rotating member 33 on the one hand, and on the other hand, prevents the rotating member 33 from being obstructed during the axial translation when the adjusting member 31 rotates, which is beneficial to improving the stability and reliability of the handle bending performance.

[0060] Specifically, as Figure 4 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 first rotating connection portion 320 is provided at the proximal end of the moving member 32 and the second rotating connection portion 332 is provided at the distal end of the rotating member 33, or the first rotating connection portion 320 is provided at the distal end of the moving member 32 and the second rotating connection portion 332 is provided at the proximal end of the rotating member 33. In some exemplary embodiments, the first rotating connection portion 320 includes a rib protruding from the circumferential surface of the moving member 32, and the second rotating portion includes a groove recessed from the circumferential surface of the rotating member 33. The rib and the groove cooperate to enable relative rotation between the moving member 32 and the rotating member 33. In some other exemplary embodiments, the first rotating connection portion 320 includes a groove recessed from the circumferential surface of the moving member 32, and the second rotating portion includes a rib protruding from the circumferential surface of the rotating member 33. In some preferred embodiments, the rib and the groove are each uniformly arranged circumferentially, which is beneficial to improving the cooperation balance and stability. In some exemplary embodiments, the first rotating connection portion 320 is provided on the outer wall of one end of the moving member 32 and the second rotating connection portion 332 is provided on the inner wall of one end of the rotating member 33, or the first rotating connection portion 320 is provided on the inner wall of one end of the moving member 32 and the second rotating connection portion 332 is provided on the outer wall of one end of the rotating member 33, so as to facilitate the effective relative rotation between the first rotating connection portion 320 and the second rotating connection portion 332. The arrangement is flexible and convenient, and the rotation stability and reliability are good. In addition, any structure that can effectively achieve relative rotation between the first rotating connection portion 320 and the second rotating connection portion 332 falls within the protection scope of the present invention.

[0061] Specifically, as Figure 4 shown, the bending adjustment assembly 3 further includes a wire locking block 35. A locking block groove 331 is formed on the rotating member 33. The wire locking block 35 is detachably fitted in the locking block groove 331. The wire passes through the locking block groove 331 and is fixedly connected to the wire locking block 35, so as to effectively lock the proximal end of the wire, improve the reliability and stability of the fixation of the wire to the bending adjustment assembly 3, and improve the overall reliability of the handle for the bending sheath tube.

[0062] As Figure 4 shown, in some exemplary embodiments, the wire locking block 35 includes a first wire locking portion 350 and a second wire locking portion 351. 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. The proximal end of the 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 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 set screw. The wire locking nut is threadedly connected to the wire locking set screw, so that the two can effectively fix the wire in the tightened state, and improve the fixation reliability of the proximal end of the wire to the wire locking block 35.

[0063] As Figure 4 shown, in some exemplary embodiments, the inner wall of the rotating member 33 has a certain thickness. Then, a wire hole 352 is further provided on the inner wall of the rotating member 33. The wire hole 352 communicates with the locking block groove and is used for the wire to pass through and enter the locking block groove, and then be locked with the wire locking block 35, improving the reliability of wire locking.

[0064] As Figure 4 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. The first rotating block and the second rotating block are detachably connected to improve the assembly convenience. Among them, the locking block groove 331 and the wire locking block 35 can be arranged on the first rotating block or the second rotating block, and the arrangement is flexible.

[0065] Specifically, as Figure 4 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 housing 1, so as to drive the moving member 32 to move axially during the rotation of the adjusting member 31. The threaded connection is convenient and reliable for driving.

[0066] Specifically, the moving member 32 moves in coordination with the proximal end of the wire through the rotating member 33, driving the distal end of the sheath tube 2 to bend; As Figure 4As shown, the center of the moving member 32 is a hollow structure. A protruding pointer 322 is provided on the moving member 32. The outer peripheral surface of the moving member 32 has a planar area and a threaded area. The external thread 321 is provided in the threaded area, and the protruding pointer 322 is provided in the planar area, and the protruding pointer 322 protrudes in a direction away from the center of the moving member 32.

[0067] In some exemplary embodiments, the interior of the moving member 32 can be provided with a hollow hole having an elliptical circumferential cross-section. The ellipse has a major diameter and a minor diameter. Correspondingly, the elliptical circumferential cross-section of the hollow hole has a major diameter and a minor diameter. The planar area is arranged parallel to the axial plane where the major diameter is located, which can make the planar area closer to the center of the hollow hole, facilitating the arrangement of a larger planar area in the axial direction. And the protruding pointer 322 protrudes in a direction perpendicular to the axial direction towards the housing 1. The protruding pointer 322 can be optionally arranged on the proximal end face, the distal end face or the middle section of the planar area. Arranging the planar area close to the center of the hollow hole also facilitates reserving a certain arrangement space for the protruding pointer 322.

[0068] As Figure 6 shown, the housing 1 is provided with a bending adjustment window 11. When the housing 1 and the bending adjustment assembly 3 are assembled, the protruding pointer 322 is axially located in the bending adjustment window 11. The protruding pointer 322 radially penetrates the bending adjustment window 11 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, which is used to indicate the bending angle of the sheath 2 during the adjustment process. During the movement of the moving member 32 relative to the housing 1, the protruding pointer 322 can axially move in the bending adjustment window 11 along with the moving member 32 to point to different bending adjustment scales 12, improving the accuracy and visualization of adjusting the bending angle of the distal end of the sheath 2 by the bending adjustment assembly 3. 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 member 32, preventing the moving member 32 from rotating relative to the housing 1 to a certain extent when the adjusting member 31 rotates, and improving the effectiveness and reliability of the circumferential limit of the moving member 32.

[0069] In some exemplary embodiments, the housing 1 is a split structure, that is, the housing 1 includes a first outer shell and a second outer shell, and the first outer shell and the second outer shell are detachably connected to improve the assembly convenience.

[0070] In some exemplary embodiments, a pipe clamp 14 is provided inside the distal end of the housing 1. The pipe clamp 14 has a pipe hole for the sheath 2 to pass through and restricts the movement of the sheath 2 in a direction perpendicular to the axial direction, playing a role in positioning the sheath 2 and preventing the sheath 2 from shaking during the bending adjustment process and affecting the distal end alignment accuracy.

[0071] Combined with the above specific embodiments, the evacuation process of the handle for the bending sheath tube includes: the proximal end of the sheath tube 2 is connected to the connection section 51 of the rotating assembly 5. The blood with gas will enter the inside of the connection section 51 from the proximal end of the sheath tube 2, that is, enter the cavity 56 of the rotating assembly 5. And the proximal end of the rotating assembly 5 is sealed through the sealing part 55, so that the blood with gas flows out from the through hole 520 communicating with the cavity 56 on the sealing section 52 and enters the sealing cavity. Since the gas density is less than the blood density, the gas will be above the blood in this sealing cavity. At the same time, the air hole 420 on the sealing and fixing assembly 4 and its externally connected infusion tube 6 can be adjusted upward manually, and can always maintain a constant orientation towards the shell 1 during the operation and will not rotate with the rotation of the rotating assembly 5. Then the gas located above in the sealing cavity can preferably be sucked away from the infusion tube 6 through the air hole 420, realizing the effective evacuation of the gas in the inner cavity of the sheath tube 2, shortening the evacuation time, and improving the convenience, efficiency and stability of evacuation.

[0072] The operation process of the handle for the bending sheath tube includes: the rotating assembly 5 drives the proximal end of the sheath tube 2 connected to the connection section 51 to rotate, realizing the adjustment of the circumferential orientation of the distal end bending of the sheath tube 2. At the same time, it drives the limit guiding part 34 and the rotating part 33 to rotate. And the rotating part 33 is rotatably arranged relative to the moving part 32, so that the moving part 32 will not rotate, preventing the self-locking friction from increasing between the adjusting part 31 and the moving part 32 with rotational cooperation. Especially when the bending angle of the distal end of the sheath tube 2 is too large, it can avoid the torque influence brought by greater self-locking friction, enabling the rotating assembly 5 to easily drive the whole sheath tube 2 to rotate, improving the convenience of the rotating assembly 5 to adjust the circumferential orientation of the bending of the sheath tube 2 and the rotation feel; 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 axially move along the limit guiding part 34 sleeved on the sheath tube 2, and driving the proximal end of the wire connected to the rotating part 33 to move axially together, thereby driving the distal end of the wire and the distal end of the sheath tube 2 to bend, realizing the adjustment of the bending angle of the distal end of the sheath tube 2.

[0073] The above description only shows some embodiments of the present invention and is not used to limit the present invention. Those skilled in the art should understand that the present invention will have various changes and improvements. Any modifications, equivalent replacements and improvements made in accordance with the present invention fall within the scope of protection required by the present invention.

Claims

1. A handle for bending a sheath tube, characterized in that, Comprising: A housing (1) for accommodating the proximal end of the sheath tube (2); A bending adjustment assembly (3) including a wire, and an adjusting member (31) and a moving assembly that are rotatably connected. The distal end of the wire is used to connect 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 wire. When the adjusting member (31) rotates, the moving assembly can drive the proximal end of the wire to move axially along the handle; A sealing and fixing assembly (4) detachably and fixedly connected to the proximal end of the housing (1). The sealing and fixing assembly (4) is provided with an air hole (420), and the air hole (420) is used to connect to an infusion tube externally; A rotating assembly (5) rotatably connected to the sealing and fixing assembly (4). A sealing 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) includes a cavity and at least one through hole (520) communicating with the cavity. The cavity is hermetically connected to the sheath tube (2). The inner cavity of the sheath tube (2), the cavity, the through hole (520), the sealing cavity and the air hole (420) are sequentially communicated to form an exhaust passage; within the rotation stroke of the rotating assembly (5) relative to the sealing and fixing assembly (4), the relative position of the air hole (420) and the housing (1) in the circumferential direction of the handle is fixed.

2. The handle for bending a sheath tube according to claim 1, characterized in that, The sealing and fixing assembly (4) includes a sealing ring section (42). A receiving groove (421) is provided on the inner wall of the sealing ring section (42), and the air hole (420) is located on the groove wall of the receiving groove (421); The rotating assembly (5) includes a sealing section (52). The through hole (520) is provided on the sealing section (52), and the sealing ring section (42) is located on the outer circumference of the sealing section (52); The outer diameter of the sealing section (52) is smaller than the inner diameter of the circle where the bottom wall of the receiving groove (421) is located. The sealing cavity is located between the sealing ring section (42) and the sealing section (52) in the circumferential direction of the handle, and both axial ends of the sealing cavity are sealed.

3. The handle for bending a sheath tube according to claim 2, characterized in that, 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 axially by the sealing ring (522).

4. The handle for bending a sheath tube according to claim 3, characterized in that, The sealing section (52) includes at least two of the sealing grooves (521). At least two of the sealing grooves (521) are respectively located on both sides of the through hole (520) axially, and at least two of the sealing grooves (521) are respectively located on both sides of the air hole (420) axially.

5. The handle for bending a sheath tube according to claim 2, characterized in that, The moving assembly includes a moving member (32) and a rotating member (33) that are relatively rotatably arranged. The moving member (32) is rotatably connected to the adjusting member (31), and one end of the wire is connected to the rotating member (33); The rotating member (33) is used for detachably and fixedly connecting with 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.

6. The handle for bending a sheath tube according to claim 5, characterized in that, The bending adjustment assembly (3) further includes a limit guiding member (34). The limit guiding member (34) is used for sleeving on the sheath tube (2), and the rotating member (33) is sleeved on the limit guiding member (34). During the rotation of the rotating assembly (5), the limit guiding member (34) is used for restricting the relative rotation between the rotating member (33) and the sheath tube (2); during the rotation of the adjusting member (31), the limit guiding member (34) is used for guiding the moving direction of the moving assembly.

7. The handle for bending a sheath tube according to claim 6, characterized in that, A first limit portion (340) is provided on the outer wall of the limit guiding member (34), and a second limit portion (330) is provided inside the rotating member (33). The first limit portion (340) and the second limit portion (330) are matched.

8. The handle for bending a sheath tube according to claim 5, characterized in that, The bending adjustment assembly (3) further includes a wire locking block (35). A locking block groove (331) is formed on the rotating member (33), and the wire locking block (35) is detachably fitted in the locking block groove (331). The wire passes through the locking block groove (331) and is fixedly connected with the wire locking block (35).

9. The handle for bending a sheath tube according to claim 5, 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). The internal thread (310) is matched with the external thread (321).

10. The handle for bending a sheath tube according to any one of claims 2-9, characterized in that, The sealing and fixing assembly (4) further includes a fixing member (41) and a connecting ring section (43). The fixing member (41) is detachably and fixedly connected with the proximal end of the housing (1), and the connecting ring section (43) is rotatably connected with the rotating assembly (5); the sealing ring section (42) is located between the fixing member (41) and the connecting ring section (43).

11. The handle for bending a sheath tube according to claim 10, characterized in that, A plurality of circumferentially arranged angle card slots (430) are provided on the inner wall of the connecting ring section (43). The rotating assembly (5) includes a first ring section (53). The first ring section (53) is connected with the proximal end of the sealing section (52), and a plurality of telescopic members (530) are provided on the first ring section (53). The telescopic members (530) can intermittently abut against the angle card slots (430) for defining the rotation step of the rotating assembly (5) and locking the rotating assembly (5).

12. The handle for bending a sheath tube according to claim 10, characterized in that, A plurality of scale lines (431) are provided on the outer wall of the connecting ring section (43). The rotating assembly (5) includes a second ring section (54). An angle pointer (540) is provided on the outer wall of the second ring section (54). The angle pointer (540) can point to one of the plurality of scale lines (431) when the rotating assembly (5) rotates.

13. The handle for bending a sheath tube according to claim 2, characterized in that, The rotating assembly (5) further includes a connecting section (51) for communicating with the proximal end of the sheath tube (2). The inside of the connecting section (51) is communicated with the cavity.

14. The handle for bending a sheath tube according to claim 10, characterized in that, At least one first fixing portion (410) is provided on the outer surface of the fixing member (41), at least one second fixing portion is provided on the inner wall of the proximal end of the housing (1), and at least one of the first fixing portions (410) is snap-fitted with at least one of the second fixing portions.

15. The handle for bending a sheath tube according to claim 5, characterized in that, The moving member (32) cooperates with the proximal end of the wire through the rotating member (33) to drive the distal end of the sheath tube (2) to bend; a convex pointer (322) is provided on the moving member (32), and the convex pointer (322) protrudes in a direction away from the center of the moving member (32); A bending adjustment window (11) is formed in the housing (1), and a bending adjustment scale (12) is provided on the side wall of the bending adjustment window (11). During the movement of the moving member (32) relative to the housing (1), the convex pointer (322) can move with the moving member (32) in the bending adjustment window (11) to point to different bending adjustment scales (12).

Images