Tension indicator

Abstract

The invention relates to a tension indicator, which is used for a conveyor for conveying medical instruments, and comprises an adjusting knob which is internally provided with a knob cavity and externally provided with a long-strip hole which communicates the knob cavity with the outside and extends along a longitudinal axis; the tension sleeve is fixedly arranged in the knob cavity; the pointer sliding frame is arranged in the tension sleeve in a sliding manner; the elastic piece is arranged in the tension sleeve, and the two ends of the elastic piece abut against the tension sleeve and the pointer sliding frame respectively; one end of the tension pointer is connected with the pointer sliding frame, and the other end of the tension pointer penetrates out of the long-strip-shaped hole and can move relative to the long-strip-shaped hole; the near end of the connecting rod penetrates through the tension sleeve and then is fixed to the pointer sliding frame. Whether an implant of the implantation instrument reaches an expected position of a puncture opening or not is recognized through the indication function of the tension assembly.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a tension indicator. Background Art

[0002] Interventional therapy is to establish a channel using a puncture needle under the guidance of medical imaging equipment, and introduce special catheters, guide wires and other precision instruments into the human body through the puncture port to diagnose and locally treat pathological conditions in the body. Interventional therapy applies digital technology to expand the doctor's vision and extend the doctor's hands with the help of catheters and guide wires. Its incision is only the size of a grain of rice. Without cutting human tissues, it can treat many diseases that could not be treated in the past and required surgical treatment or had poor curative effects with medical treatment, such as tumors, hemangiomas, various hemorrhages, etc.

[0003] After the interventional operation is completed, it is necessary to close and stop bleeding at the puncture port. Currently, the commonly used methods for stopping bleeding at the puncture port after interventional procedures are: manual compression hemostasis method and mechanical compression hemostasis method. However, the above two hemostasis methods have a long compression time, which to a certain extent prolongs the patient's pain, and at the same time, complications such as bleeding, oozing blood, and hematoma will occur. Currently, the existing vascular closure devices are complex to operate, require a high degree of proficiency for operators, require repeated switching of different instruments for the positioning and closure of the puncture port, and most vascular closure devices are not applicable to carotid artery puncture. Summary of the Invention

[0004] Based on this, it is necessary to provide a transporter and its system for the problems that the existing vascular closure device is complex to operate and the closure steps are cumbersome and time-consuming during the closure process, require multiple mechanical cooperations, there is oozing blood during the closure process, and the carotid artery puncture port cannot be closed.

[0005] The present application relates to a tension indicator for a transporter for transporting medical devices, including: an adjustment knob having a knob cavity inside and a long hole extending along the longitudinal axis communicating the knob cavity with the outside; a tension sleeve fixedly arranged in the knob cavity; a pointer carriage slidably arranged in the tension sleeve; an elastic member arranged in the tension sleeve and having two ends respectively abutted against the tension sleeve and the pointer carriage; a tension pointer having one end connected to the pointer carriage and the other end passing through the long hole and capable of moving relative to the long hole; a connecting rod having a proximal end passing through the tension sleeve and fixed to the pointer carriage.

[0006] Further, the adjustment knob is also provided with a locking structure capable of locking the tension pointer relative to the long hole.

[0007] Further, the locking structure includes a locking groove provided on the outer periphery of the adjusting knob and a locking member detachably connected to the locking groove, and part or all of the long hole is disposed in the locking groove.

[0008] Further, the locking structure includes a locking rod, one end of the locking rod is rotatably connected to the adjusting knob, and the other end is provided with a locking hook or a locking ring capable of locking the tension pointer; when the locking rod is parallel or substantially parallel to the longitudinal axis, the tension pointer can be locked.

[0009] Further, first sleeve chutes are symmetrically arranged on both sides of the tension sleeve; the pointer carriage includes a main body rod arranged radially, the main body rod is slidably arranged in the first sleeve chute and a tension pointer is fixedly connected to the end thereof; when the main body rod slides, the tension pointer can be driven to translate relative to the long hole.

[0010] Further, a first pointer slider is arranged on the main body rod, and a pointer slider chute cooperating with the first pointer slider is arranged on the inner wall of the knob cavity; on the outer periphery of the tension sleeve and at the position of the first sleeve chute, a slider sliding surface cooperating with the first pointer slider is arranged, and the first pointer slider can slide between the outer wall of the tension sleeve and the inner wall of the adjusting knob.

[0011] Further, the pointer carriage further includes a second pointer slider vertically arranged on the main body rod; a second sleeve chute extending along the longitudinal axis is further arranged on the tension sleeve, and the second pointer slider is slidably arranged in the second sleeve chute.

[0012] Further, a receiving groove and a sleeve through groove communicating with the receiving groove are arranged in the tension sleeve, the sleeve through groove penetrates the tension sleeve radially, the elastic member is received in the receiving groove, and the pointer carriage is slidably arranged in the receiving groove; the tension pointer is received and hinged in the sleeve through groove, and its free end can extend out of the tension sleeve along the sleeve through groove.

[0013] Further, a hinge hole is arranged on the inner wall of the sleeve through groove, and at least one side of the tension pointer is provided with a pivot shaft rotatably connected to the hinge hole.

[0014] Further, the pointer carriage includes a sliding rod, at least one side of the sliding rod is provided with a carriage protrusion, and a sleeve chute cooperating with the carriage protrusion is arranged in the receiving groove.

[0015] Further, the pointer carriage includes a hooking portion connected to the proximal end of the sliding rod, and the hooking portion is connected to one end of the tension pointer; when the sliding rod slides, the tension pointer can be driven to rotate relative to the long hole.

[0016] Further, when the tension pointer is at the nearest end of the long hole, the elastic member is pre-compressed to provide a pre-pressure.

[0017] The technical solution of the present invention has the following beneficial effects:

[0018] 1. The delivery system of the present invention can realize the semi-automatic release of the vascular puncture site, without the assistance of imaging devices such as ultrasound, DSA, CT, and magnetic resonance. The indication function of the tension component is used to identify whether the implanted device implant reaches the expected position of the puncture site;

[0019] 2. The delivery system of the present invention can achieve good sealing performance during the operation. By opening or closing the sealing transmission member structure during the operation, the sealing effect can be ensured while realizing the release;

[0020] 3. During the process of releasing the implanted device of the present invention, if it is found that the position of the implanted device implant is incorrect, or the release position is not at the expected position, the adjustment wheel can be rotated clockwise to recover the implant, and according to the surgical procedure, it can be released again;

[0021] 4. During the operation of the delivery system of the present invention, only by continuously rotating the adjustment wheel in one direction can the release or recovery of the implanted device be realized, without changing the rotation direction, preventing misoperation;

[0022] 5. The delivery system of the present invention, by setting the bypass channel structure, can realize functions such as exhaust and blood drawing on the premise that the main channel of the delivery device is sealed.

[0023] 6. The delivery system of the present invention can complete the closing procedure in a short time, with simple operation steps. During the operation, there is no need to switch instrument devices, and a set of delivery system can complete the puncture site positioning and closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the delivery system in the first embodiment.

[0025] Figure 2 It is an exploded structure diagram of the delivery device in the first embodiment;

[0026] Figure 3 It is a cross-sectional view of the delivery system in the first embodiment;

[0027] Figures 4A - 4B It is a three-dimensional structure diagram of the housing assembly in the first embodiment;

[0028] Figures 5A - 5B Stereoscopic structure diagram of the indicating slider in the first embodiment;

[0029] Figure 6 Stereoscopic structure diagram of the sheath fixing part in the first embodiment;

[0030] Figure 7 Stereoscopic structure diagram of the sealing cap in the first embodiment;

[0031] Figure 8A Stereoscopic structure diagram of the adjusting wheel in the first embodiment;

[0032] Figure 8B For Figure 8A Cross-sectional view;

[0033] Figures 9A - 9B Stereoscopic structure diagram of the transmission gear unit in the first embodiment;

[0034] Figures 10A - 10B Stereoscopic structure diagram of the reciprocating threaded shaft in the first embodiment;

[0035] Figure 10C Axial cross-sectional view of the reciprocating threaded shaft in the first embodiment;

[0036] Figures 11A - 11B Stereoscopic structure diagram of the shaft seat in the first embodiment;

[0037] Figure 11C Axial cross-sectional view of the shaft seat in the first embodiment;

[0038] Figures 12A - 12B Stereoscopic structure diagram of the tee sleeve in the first embodiment;

[0039] Figure 12C Axial cross-sectional view of the tee sleeve in the first embodiment;

[0040] Figure 13 Assembly drawing of the shaft seat, reciprocating threaded shaft and tee sleeve in the first embodiment;

[0041] Figure 14 Exploded structure diagram of the tension assembly in the first embodiment;

[0042] Figure 15 Cross-sectional view of the tension assembly in the first embodiment;

[0043] Figures 16A - 16B Stereoscopic structure diagram of the adjusting knob in the first embodiment;

[0044] Figure 17 Stereoscopic structure diagram of the pointer carriage in the first embodiment;

[0045] Figure 18 Stereoscopic structure diagram of the tension sleeve in the first embodiment;

[0046] Figure 19 Structure diagram of the implant device in the first embodiment;

[0047] Figure 20A Operating state of the delivery system in the first embodiment Figure One ;

[0048] Figure 20B Operating state of the delivery system in the first embodiment Figure Two ;

[0049] Figure 21 Cross-sectional structure diagram of the seal sleeve assembly in the second embodiment;

[0050] Figure 22 Exploded structure diagram of the tension assembly in the third embodiment;

[0051] Figure 23 Stereoscopic structure diagram of the tension sleeve in the third embodiment;

[0052] Figure 24 Stereoscopic structure diagram of the pointer carriage in the third embodiment;

[0053] Figure 25 Stereoscopic structure diagram of the tension pointer in the third embodiment;

[0054] Figures 26A - 26B Operating state diagram of the tension assembly in the third embodiment;

[0055] Figure 27 Assembly drawing of the shaft seat and the three-way sleeve in the fourth embodiment; Detailed implementation manners

[0056] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0059] It should be noted that for a conveyor, generally the end of the conveyor that is relatively closer to the operator is referred to as the "proximal end", and the end of the conveyor that is relatively farther from the operator is referred to as the "distal end", and the "proximal end" and "distal end" of any component of the conveying system are defined based on this principle; the "axial direction" refers to the direction parallel to the line connecting the centers of the distal end and the proximal end of the medical device; the "radial direction" refers to the direction perpendicular to the axial direction.

[0060] First Embodiment

[0061] See Figure 1 As shown, this embodiment provides a conveying system 3, including a conveyor 1 and an implant device 2 mounted on the conveyor 1. In this embodiment, the implant device is a blocking disc, and the implant device 2 is conveyed to a predetermined position through the conveyor 1 to block the vascular incision to achieve vascular closure. The conveyor 1 includes a handle 100 and a sheath 200 connected to the handle 100. Among them, the handle 100 includes a housing assembly 40, a tension assembly 30 disposed on the proximal side of the housing assembly 40, and an exhaust assembly 50.

[0062] See Figures 2 - 3 As shown, the conveyor 1 includes a housing assembly 40 (including an upper housing 41 and a lower housing 42), a sliding assembly 10 and a sealing assembly 20 disposed in the housing assembly 40, a tension assembly 30 and an exhaust assembly 50 disposed at the proximal end of the housing 40. The exhaust assembly 50 includes a hose 52 and a three-way valve 51 connected to one end of the hose 52. The connecting rod 60 passes through the conveyor 1 along the longitudinal axis ( Figure 3 shown as X-X in the figure) and its distal end is detachably connected to the implant device 2. The connecting rod 60 can be a steel cable or other wire or rod-like structure, etc., and can form structures such as a sheath core and a push rod.

[0063] See Figures 4A - 4BAs shown in the figure, the structure of the housing assembly 40 will be described. The housing assembly 40 as a whole is a handle structure extending along the longitudinal axis, including a cylindrical structure and a conical structure provided at the distal end of the cylindrical structure. A housing through-hole 401 is provided at the transition position between the cylindrical structure and the conical structure. The housing through-hole 401 penetrates the side walls on opposite sides of the housing 40 to communicate with the inner cavity. It can be understood that in other embodiments, the housing through-hole 401 may also only penetrate one side wall of the housing 40. For the convenience of operation, in other embodiments, the middle part of the outer wall of the housing assembly is recessed inward, and the outer diameter of the middle part of the outer wall of the housing assembly is smaller than the outer diameters of its two ends, which is convenient for the operator to hold. A housing groove 403 is provided on the inner wall of the proximal end of the housing assembly 40. The groove 403 is an annular groove surrounded by two adjacent annular protrusions. In addition, a first housing protrusion 402 and a second housing protrusion 404 are respectively provided on the near side and the far side of the housing through-hole 401 of the housing assembly 40. A housing sliding fit member 406 is provided on the inner wall of the conical structure of the housing assembly 40. The housing sliding fit member 406 in this embodiment is a protrusion structure, strip-shaped and extending along the longitudinal axis. In other embodiments, the housing sliding fit member may also be provided as a groove structure extending along the longitudinal axis.

[0064] In this embodiment, for the convenience of processing and assembly, the housing assembly 40 can be designed to be split in half from the middle, that is, the housing assembly 40 includes a first housing 41 and a second housing 42. A plurality of connection structures are provided at the connection between the first housing 41 and the second housing 42. The connection structure can be a snap structure and / or a protrusion-groove structure. The first housing 41 and the second housing 42 are connected to each other through the connection structure and form a housing assembly 40 extending along the longitudinal axis after being buckled.

[0065] See Figure 4A As shown in the figure, the structure of the first housing 41 will be described. A housing groove 412 is provided on the inner wall of the first housing 41. The housing groove 412 is generally provided at the middle position of the first housing 41. Of course, the housing groove 412 may also be provided at a position near the proximal end or the distal end of the first housing 41. A strip-shaped groove 413 is also provided on the inner wall of the first housing 41. Part of the strip-shaped groove 413 is provided on the housing groove 412. Specifically, the proximal side of the strip-shaped groove 413 is flush with or close to the proximal side of the housing groove 412, and the distal side extends along the longitudinal axis. After passing over the distal side of the housing groove 412, it continues to extend for a certain distance, that is, the length of the strip-shaped groove 413 is greater than the length of the housing groove 412 along the longitudinal central axis of the housing assembly 40. At the bottom of the strip-shaped groove 413, a strip-shaped through-hole 414 is also provided. The strip-shaped through-hole 414 extends along the longitudinal axis for a certain distance and penetrates the inner wall and the outer wall of the first housing 41. See Figure 1As shown, on the outer side of the first housing 41 and at the edge position of the strip-shaped through hole 414, a first mark 405 is further provided. Optionally, the first mark 405 extends circumferentially and is at a substantially middle position in the longitudinal axis direction of the strip-shaped through hole 414.

[0066] See Figure 4B As shown, considering that the structure of the second housing 42 is generally the same as that of the first housing 41, its specific structure will not be elaborated here. Up to

[0067] See Figure 2 As shown, the housing assembly 40 further includes an arc-shaped limiting plate 44. The arc-shaped limiting plate 44 cooperates with the housing groove 412, that is, the arc-shaped limiting plate 44 can be assembled into the housing groove 412, and the two can be fixed by a convex-groove structure or can be fixed by other methods such as bonding. An arc-shaped plate groove 441 is provided on one end side of the arc-shaped limiting plate 44, and the arc-shaped plate groove 441 is formed by a notch provided on one end side of the arc-shaped plate 44. When the arc-shaped limiting plate 44 is installed in the housing groove 412, the arc-shaped plate groove 441 is aligned with the strip-shaped groove 413. In this embodiment, the width of the arc-shaped plate groove 441 is basically equal to the width of the strip-shaped groove 413, and the two together form a slide rail groove. Compared with the case where the arc-shaped limiting plate 44 is not provided with the groove 441, the setting of the arc-shaped plate groove 441 increases the length of the slide rail groove.

[0068] See Figures 5A - 5B As shown, the housing assembly 40 further includes an indicating slider 43. The indicating slider 43 includes a slider body 431. The slider body 431 is strip-shaped and cooperates with the slide rail groove, that is, the indicating slider 43 can slide in the strip-shaped groove 413 and the arc-shaped plate groove 441 along the longitudinal axis direction. A second mark 4311 is provided on one side surface of the slider body 431, and a connecting member 432 is provided on the other side surface. Among them, the second mark 4311 can be formed by providing a transverse groove on the slider body 431, or can be formed by providing a printed mark or a color mark on the slider body 431, etc. The connecting member 432 has a block structure. In other embodiments, the connecting member can also have a cylindrical structure or other structures, and can be integrally provided with the slider body 431 or can be fixedly connected after being separately provided. An indicating slider transmission tooth 4321 is provided on the free end surface of the connecting member 432. See Figure 3As shown, during specific assembly, first install the indicating slider 43 in the strip-shaped groove 413, and set the connecting member 432 in the strip-shaped through hole 414, so that the second mark 4311 is exposed outside the first housing 41. Then fix the arc-shaped limiting plate 44 in the arc-shaped plate groove 441. The arc-shaped limiting plate 44 limits the indicating slider 43 in the strip-shaped groove 413 to prevent the indicating slider 43 from falling off the strip-shaped groove 413. When the indicating slider 43 slides along the slide rail groove, the second mark 4311 moves along the longitudinal axis relative to the first mark 405 provided on the outer surface of the housing assembly 40.

[0069] See Figures 2 - 3 As shown, the sliding assembly 10 includes a sheath fixing member 11, an adjusting wheel 12, a sealing gasket 13 and a sealing cap 14. Among them, the sealing gasket 13 is arranged inside the sheath fixing member 11, and the sealing cap 14 is matched with the proximal end of the sheath fixing member 11 to squeeze the sealing gasket 13. The slider member 11 is threadedly connected to the adjusting wheel 12, and rotating the adjusting wheel 12 can drive the sheath fixing member 11 to move along the longitudinal axis.

[0070] Specifically, referring to Figure 6As shown in the figure, the structure of the sheath fixing member 11 will be described. The sheath fixing member 11 has a hollow cavity inside, including a cylindrical structure 111 and a rod structure 112 fixed to the distal side of the cylindrical structure 111. Transmission protrusions 114 are provided on the outer side of the cylindrical structure 111. In this embodiment, the transmission protrusions 114 are in the form of bump structures, and one or a plurality of transmission protrusions 114 can be provided along the axial direction. In other embodiments, the transmission protrusions can also be external thread structures. An external thread structure 115 is provided on the proximal side of the cylindrical structure 111, and a gasket mounting hole 116 communicating with the hollow cavity is provided inside the cylindrical structure. The gasket mounting hole 116 is used to mount the gasket 13. The gasket 13 is an annular hollow structure made of silica gel or other elastic sealing materials. In other embodiments, the sealing mounting hole 116 can also be provided on the rod-shaped structure of the sheath fixing member 11. Fixing member sliding fit members 113 are provided on the upper and lower side surfaces of the rod structure 112. The fixing member sliding fit members 113 in this embodiment are provided in the form of grooves extending along the longitudinal axis and penetrating the distal end surface of the rod structure 112. The fixing member sliding fit members 113 are arranged parallel to the rod structure 112, and their lengths are the same as the length of the rod structure 112, that is, their distal ends extend to the distal side of the rod structure 112 and their proximal ends extend to the distal end surface of the cylindrical structure 111. In other embodiments, the length of the fixing member sliding fit members 113 can also be shorter than the rod structure 112. At this time, there is a certain distance between the distal end of the slide rail groove and the distal side of the rod structure and they are not flush, and / or there is a certain distance between the proximal end of the slide rail groove and the distal end surface of the cylindrical structure. The fixing member sliding fit members 113 are used for sliding fit with the housing sliding fit members 406 on the housing assembly 40. The housing sliding fit members 406 provided on the opposite sides of the fixing member sliding fit members 113 are used to limit the sheath fixing member 11 to prevent it from rotating. Refer to Figure 2 As shown in the figure, the proximal end of the sheath 200 is fixedly connected to the sheath fixing member 11. Specifically, the proximal side of the sheath 200 is inserted into the hollow cavity of the sliding member 11 and then fixed. This fixing method can be a bonding method or a mechanical connection such as a threaded connection method. When the sheath fixing member 11 slides relative to the housing sliding fit members 406 inside the housing assembly 40, it will drive the forward or backward movement of the sheath 200.

[0071] In other embodiments, it is also possible to provide a fixing member sliding fit member in the form of a groove only on one side surface of the rod structure, and correspondingly, only provide one housing sliding fit member on the housing assembly that cooperates with the fixing member sliding fit member. In addition, when the housing sliding fit member is in the form of a groove, the fixing member sliding fit member is provided in the form of a convex structure that cooperates with it.

[0072] Refer to Figure 7As shown in the figure, the structure of the sealing cap 14 will be described. The sealing cap 14 includes a cap body 141 and a screwing part 142 fixed to the cap body 141. The cap body 141 is a cylindrical structure with a hollow cavity, and an internal thread 143 is provided on its inner wall. The internal thread 143 is matched with the external thread structure 115 of the sliding member 11 to achieve threaded connection. A columnar protrusion 144 is also provided in the hollow cavity of the cap body 141. The columnar protrusion 144 can extend into the gasket mounting hole 116 of the sheath fixing member 11 to squeeze the gasket 13. Specifically, when the internal thread 143 is matched with the external thread structure 115, by tightening the sealing cap 14, the end face of the columnar protrusion 144 squeezes the gasket 13 to achieve the sealing function.

[0073] In other embodiments, the sealing cap may not be provided, and the sheath fixing member equipped with the gasket can also achieve a certain sealing function.

[0074] See Figures 8A - 8B As shown in the figure, the structure of the adjusting wheel 12 will be described. See Figure 8A As shown in the figure, the adjusting wheel 12 extends along the longitudinal axis and has a lumen structure inside. The adjusting wheel 12 includes a rotating shaft 122 and a knob part 121 provided at the distal end of the rotating shaft 122. The two can be integrally provided, such as by 3D printing or integral injection molding, or can be separately provided and then fixedly connected. At the outer periphery of the rotating shaft 122 and near the proximal side position, a through-hole structure 125 is provided. The through-hole structure 125 includes a through-hole 1251 and an annular protrusion 1252. Among them, the through-hole 1251 is formed by removing part of the material on the surface of the rotating shaft 122. Of course, it can also be integrally formed during injection molding or other integral forming processes. The through-hole 125 is to penetrate the tube wall of the rotating shaft 122 to achieve the communication between its inner cavity and the outside. The annular protrusion 1252 protrudes from the outer surface of the rotating shaft 122 and surrounds the through-hole 125. The inner wall of the annular protrusion 1252 is flush with the inner wall of the through-hole 125. The setting of the annular protrusion 1252 is to increase the height of the through-hole structure 125. When the wall thickness of the rotating shaft 122 is H1 and the height of the annular protrusion 1252 is H2, the height of the through-hole structure 125 is the sum of H1 and H2. Increasing the through-hole structure 125 is to make it cooperate well with other components. In addition, a thickened layer 123 is also provided on the outer periphery of the rotating shaft 122 and on the distal side of the through-hole. The thickened layer 123 extends along the longitudinal axis for a certain distance, and its length is less than the length of the rotating shaft 12. An indicating thread 124 is provided on the thickened layer 123, and the indicating thread 124 is matched with the indicating slider driving teeth 4321 of the indicating slider 43. An annular groove 126 is also provided on the outer periphery of the rotating shaft 122. The annular groove 126 is to cooperate with the protrusion in the housing assembly 40 to achieve the rotational connection between the adjusting wheel 12 and the housing assembly 40.

[0075] In other embodiments, the thickened layer may not be provided, and the indicating thread may be directly provided on the outer peripheral surface of the rotating shaft, as long as the adjusting wheel can be in transmission engagement with the indicating slider driving teeth after being installed in the housing assembly. Additionally, the through hole may be provided at a position close to the distal end or in the middle of the rotating shaft, and the indicating thread may be provided on the proximal side or the distal side of the through hole. Additionally, the through hole structure may only include the through hole and not include the annular protrusion.

[0076] See Figure 8B As shown, an adjusting wheel internal thread 127 is further provided on the inner wall of the adjusting wheel 12. The adjusting wheel internal thread 127 is provided on the distal side of the adjusting wheel 12, and its axial length is less than the length of the adjusting wheel 12. In other embodiments, an internal thread 127 with an axial length the same as that of the adjusting wheel 127 may also be provided in the inner cavity of the adjusting wheel 127. The axial length of the internal thread 127 is set according to actual needs and is not specifically limited herein. The internal thread 127 meshes with the driving protrusion 114 on the sliding member 11 to form a screw drive structure.

[0077] The assembly of the sliding assembly 10 and the housing assembly 40 is described below. After the sliding member 11, the sealing gasket 13 and the sealing cap 14 are assembled to form a sealing structure, the assembled sealing structure is screwed into the adjusting wheel 12. At this time, the transmission protrusion 114 provided on the sliding member 11 is engaged with the internal thread 127 of the adjusting wheel, and at least part of the slide rail groove 113 of the sliding member 11 installed in the adjusting wheel 12 is exposed on the distal side of the adjusting wheel 12. After the adjusting wheel 12 is installed in the inner cavity of the housing assembly 40, the knob portion 121 is installed in the housing through hole 401, so that the adjusting wheel 12 is exposed from the inner cavity of the housing assembly 40, which is convenient for the operator to rotate the adjusting wheel 12 from the outside of the housing assembly 40; the two ends of the adjusting wheel 12 are limited between the first housing protrusion 402 and the second housing protrusion 404 to limit the axial displacement of the adjusting wheel 12. The indicating thread 124 on the adjusting wheel 12 meshes with the indicating slider transmission teeth 4321 on the indicating slider 43 to form a thread transmission structure; the slide rail grooves 113 on both sides of the sliding member 11 respectively cooperate with the first protruding structure 411 and the second protruding structure 421 on the housing assembly 40. When the adjusting wheel 12 is rotated, on the one hand, the adjusting wheel 12 drives the indicating slider 43 to slide along the strip groove 413, so that the second mark 4311 slides in the strip through hole 414, that is, moves relative to the first mark 405 set on the housing assembly 40. The operator determines the rotation angle of the adjusting wheel 12 by determining the position of the second mark 4311 relative to the first mark 405; on the other hand, as the adjusting wheel 12 rotates, the sliding member 11 is driven to slide relative to the first protruding structure 411 and the second protruding structure 421, thereby driving the sheath tube 200 to move forward or backward. Since the protrusion structure of the housing assembly 40 limits the position of the slider 11, the slider 11 moves relative to the housing assembly 40 and does not rotate with the adjusting wheel 12. Therefore, as the adjusting wheel 12 rotates, the sheath tube 200 is moved and the second mark 4311 is also moved, so that the rotation angle of the adjusting wheel 12 can be judged to determine the adjustment progress. Figures 2 - 3 As shown, the sealing assembly 20 includes a reciprocating threaded shaft 21, a shaft seat 22, a hemostatic seal 23, an annular sealing ring 24, a three-way sleeve 25 and a transmission gear unit 26. The reciprocating threaded shaft 21 and the shaft seat 22 are fixedly connected to form a sealing sleeve assembly 27. The sealing sleeve assembly 27 is slidably disposed in the three-way sleeve 25, and the hemostatic seal 23 is disposed in the shaft seat 22. The transmission gear unit 26 drives the sealing sleeve assembly 27 to slide in the three-way sleeve 25 to squeeze or release the hemostatic seal 23, and then to hold or loosen the connecting rod 60 passing through the sealing assembly 20, so as to realize the switching between the sealing state and the non-sealing state.

[0078] The following is an introduction to the various parts of the sealing assembly. Figures 9A - 9B, the transmission gear unit 26 is described. The transmission gear unit 26 includes a disc member 261 and a transmission tooth 262 disposed below the disc member 261. The transmission tooth 262 is a block-shaped protruding structure disposed perpendicularly to the disc member 261, and has an arc-shaped groove 264 on its end surface. The transmission gear unit 262 is movably connected to the through hole structure 125 of the adjusting wheel 12, and its size is less than or equal to the size of the through hole structure 125 so that it can move in the through hole structure 125.

[0079] See also Figures 10A - 10C , the reciprocating threaded shaft 21 is described. The reciprocating threaded shaft 21 is a cylindrical structure extending along the longitudinal axis as a whole, and a reciprocating threaded structure 21a is arranged on its outer periphery, and the reciprocating threaded structure 21a includes a first external thread 211 and a second external thread 212 arranged in a cross-arrangement. Among them, the rotation direction of the first external thread 211 is opposite to that of the second external thread 212. For example, when the first external thread 211 is a left-handed thread, the second external thread is a right-handed thread. There is no limitation on the specific rotation direction of the first external thread 211 and the second external thread 212, as long as the two have opposite rotation directions and are cross-arranged on the outer surface of the reciprocating threaded shaft 21. In this embodiment, the number of the first external thread 211 and the second external thread 212 is one circle, and the two are cross-arranged on the reciprocating threaded shaft 21. The curvature of the arc groove 264 of the transmission tooth 262 matches the curvature of the groove formed by the first external thread 211 or the second external thread 212, so as to achieve good cooperation between the transmission gear unit 260 and the reciprocating thread structure. In addition, a connecting groove 213 is also provided on the reciprocating threaded shaft 21 .

[0080] See also Figure 10C As shown, the reciprocating threaded shaft 21 has a hollow cavity structure 21b, which includes a proximal connecting hole 214 arranged on the proximal side and a distal connecting hole 216 arranged on the distal side. The proximal connecting hole 214 is a cylindrical hole and is connected to the distal connecting hole 216 to form a cavity structure. The inner wall of the proximal connecting hole 214 is also provided with a passage groove 215 extending along the longitudinal axis, and the passage groove 215 extends from the proximal end of the reciprocating threaded shaft 21 to the distal end. The distal connecting hole 216 is a tapered stepped hole whose diameter gradually decreases from the proximal end to the distal end. In other embodiments, the distal connecting hole can also be a cylindrical stepped hole. See Figures 2 - 3 As shown, a connecting tube 70 is fixedly arranged in the distal connecting hole 216 , and the distal connecting hole 216 is arranged as a tapered stepped hole to achieve good fixation of the connecting tube 70 .

[0081] See also Figures 11A - 11C The structure of the shaft seat 22 is described as shown in FIG. The outer peripheral surface of the shaft seat 22 is provided with at least one circle of sealing ring receiving groove 221, and an annular sealing ring 24 is provided in the sealing ring receiving groove 221 (see FIG. Figure 3)。A protruding connecting column 222 is provided at the distal end of the shaft seat 22. The connecting column 222 is a columnar structure as a whole and its free end is conical. Setting the free end of the connecting column 222 to be conical facilitates the assembly of the shaft seat 22 and the reciprocating threaded shaft 21. In addition, a connecting protrusion 223 that cooperates with the connecting groove 213 is also provided on the distal side of the shaft seat 22. The interior of the shaft seat 22 is hollow and has a stepped hole 22a. The stepped hole 22a includes a proximal shaft seat inner hole 228 and a distal shaft seat inner hole 224. Among them, the proximal shaft seat inner hole 228 is a large hole, and its aperture is larger than that of the distal shaft seat inner hole 224. The proximal shaft seat inner hole 228 extends from the proximal end to the distal end of the shaft seat 22, while the distal shaft seat inner hole 224 extends along the longitudinal axis from the distal end of the connecting column 222 to intersect with the proximal shaft seat inner hole 228. The intersection of the two constitutes a stepped step 230. A hemostatic seal 23 is placed in the proximal shaft seat inner hole 228. The distal end of the hemostatic seal 23 abuts against the stepped step 230 to limit its axial displacement, so that the stepped step 230 constitutes a gasket bearing step. In addition, on the inner wall of the proximal shaft seat inner hole 228, there is a strip-shaped groove 229 that communicates with the proximal shaft seat inner hole 228 and extends along the longitudinal axis. The strip-shaped groove 229 can be one or multiple and arranged circumferentially.

[0082] See Figure 11B As shown, a through-hole 227 extending along the longitudinal axis is also provided between the inner wall and the outer surface of the shaft seat 22. The through-hole 227 realizes the communication between the proximal side and the distal side of the shaft seat 22. A radial groove 226 communicating with the through-hole 227 is provided radially on the proximal face of the shaft seat 22. One or more through-holes 227 and radial grooves 226 can be provided. In this embodiment, two through-holes 227 and radial grooves 226 are provided circumferentially.

[0083] See Figure 3As shown in the figure, the assembly method of the reciprocating threaded shaft 21 and the shaft seat 22 will be described. The reciprocating threaded shaft 21 and the shaft seat 22 are fixedly connected to form a sealed sleeve assembly 27. After aligning the connecting protrusion 223 of the shaft seat 22 with the connecting groove 213 of the reciprocating threaded shaft 21, the connecting column 222 of the shaft seat 22 is inserted into the proximal connecting hole 214 of the reciprocating threaded shaft 21. For the convenience of assembly, the connecting column 222 and the proximal connecting hole 214 adopt a clearance fit. After assembly, there is a certain gap between the conical end of the connecting column 222 and the bottom of the proximal connecting hole 214. This gap enables the free end of the connecting column 222 to be proximal to the distal end of the passage groove 215 to prevent the end face of the connecting column 222 from closing the end of the passage groove 215. The passage hole 227 is aligned with the passage groove 215 of the reciprocating threaded shaft 21 to form a passage structure. Liquid can flow into the passage hole 227 through the radial groove 226, and then flow into the passage groove 215 and the gap between the connecting column 222 and the bottom of the proximal connecting hole 214 through the passage hole 227. As the liquid continues to flow, the liquid can flow into the distal connecting hole 216 and enter the connecting pipe 70.

[0084] Referring to FIGS. 12A - 12C, the structure of the three - way sleeve 25 will be introduced. The three - way sleeve 25 includes a main body pipe 251 and a branch pipe 252 communicating with the main body pipe 251. Refer to Figures 1 - 2 As shown in the figure, the branch pipe 252 is used to connect the exhaust assembly 50 to realize the exhaust of the conveyor 1. Specifically, the inlet of the branch pipe 252 is connected to the hose 52, and one end of the hose 52 is connected to the three - way valve 51. A proximal cavity 253 is provided on the proximal side of the main body pipe 251, and this proximal cavity 253 can be used as a blood storage tank. Refer to Figure 2 As shown in the figure, a sealing piece 28 can be installed in the proximal cavity 253. It has an interference fit with the proximal cavity 253 and has a through - hole. When the connecting rod 60 passes through the sealing piece 28 and enters the three - way sleeve 25, the sealing piece 28 also has an interference fit with the connecting rod 60. The setting of the sealing piece 28 prevents blood from leaking from the proximal end of the conveyor during operation. A distal cavity 254 is provided on the distal side of the three - way sleeve 25. The branch pipe 252 is communicated with the distal cavity 254 through the branch connection port 258. The branch connection port 258 is the port of the branch pipe. At this port, the inner cavity of the branch pipe 252 intersects with the distal cavity 254 to realize the communication with the distal cavity 254. A hollow pressure rod 255 is also provided in the distal cavity 254. The pressure rod 255 extends a certain distance along the longitudinal axis from the bottom surface of the distal cavity 254, and the pressure rod 255 has a pressure rod central hole 257, and this central hole 257 is communicated with the proximal cavity 253. A limiting protrusion 256 is arranged along the longitudinal axis on the circumferential outer side of the pressure rod 255. The limiting protrusion 256 cooperates with the strip - shaped groove 229 of the shaft seat 22. The number of the limiting protrusions 256 can be one or multiple distributed circumferentially, and its number is equal to and corresponds one - to - one with the strip - shaped groove 229 to realize the assembly.

[0085] See Figure 13 Figure 13 , when assembling the shaft seat 22 and the three-way sleeve 25, align the limit protrusion 256 on the pressure rod 255 with the strip groove 229 of the shaft seat 22, and the pressure rod 255 slides into the proximal shaft seat inner hole 228 of the shaft seat 22. The setting of the limit protrusion 256 and the strip groove 229 is to limit the installation of the shaft seat 22 relative to the three-way sleeve 25 at a predetermined angle. When installed at this predetermined angle, the branch connection port 258 in the three-way sleeve 25 can be aligned with the set radial groove 226 on the shaft seat 22. This predetermined angle can be 45 degrees, 60 degrees or 90 degrees. When injecting the exhaust liquid through the three-way valve 51, the exhaust liquid will enter the three-way sleeve 25 at the branch connection port 258. Since the branch connection port 258 is aligned with the radial groove 226, the exhaust liquid entering the three-way sleeve 25 will flow into the radial groove 226 and then into the shaft seat 22, and continue to flow through the passage structure into the inside of the connecting pipe 70. When the shaft seat 22 and the three-way sleeve 25 are installed in place, the distance from the free end face of the pressure rod 255 to the stepped step 230 is less than the axial length after the hemostatic seal 23 is installed in the proximal shaft seat inner hole 228, so as to realize the extrusion of the hemostatic seal 23 by the pressure rod 255. This dimensional difference can be determined according to the sealing requirements and the material of the hemostatic seal 23, etc. In addition, the annular sealing ring 24 provided on the shaft seat 22 is used to prevent the liquid from flowing out along the gap between the inner wall of the three-way sleeve 25 and the outer wall of the shaft seat 22.

[0086] See Figures 2 - 3 As shown in Figures 2 - 3 , the three-way sleeve 25 is fixedly installed in the housing assembly 40, and a part of the reciprocating threaded shaft 21 is installed in the knob 12, and the reciprocating threaded structure set on its outer circumference meshes with the transmission gear 26. When the knob 12 is rotated, since the transmission gear unit 26 is set in the through-hole structure 125 of the knob 12, the transmission gear unit 26 will rotate around the longitudinal axis together with the knob 12. Since the transmission gear unit 26 meshes with the reciprocating threaded shaft 21, the transmission gear unit 26 rotating around the longitudinal axis will drive the shaft seat 22 fixed to the reciprocating threaded shaft 21 to move along the longitudinal axis relative to the three-way sleeve 25. Since the reciprocating threaded shaft 21 is provided with a reciprocating thread, when the knob 12 is continuously rotated in one direction (clockwise or counterclockwise), the shaft seat 22 will move back and forth, so as to realize the extrusion or release of the hemostatic seal 23 by the pressure rod 255.

[0087] Continue to see Figures 2 - 3As shown, when the sliding component 10 and the sealing component 20 are installed in the housing component 40, the free end of the communicating pipe 70 slidably passes through the sealing gasket 13 and is inserted into the sheath fixing member 11, thereby realizing the connection between the sliding component 10 and the sealing component 20. Due to the extrusion of the sealing cap 14 on the sealing gasket 13, when the steel pipe moves reciprocally with the reciprocating threaded shaft 21, the communicating pipe 70 is always held tightly by the sealing gasket 13 to achieve sealing and prevent liquid from leaking from the connection between the sliding component 10 and the sealing component 20.

[0088] In other embodiments, the steel pipe can be replaced with a corrugated pipe. The corrugated pipe can be axially deformed, stretched when subjected to tensile force, compressed when subjected to pressure, and its structure and properties will not be damaged during stretching and compression. When a corrugated pipe is used, one end of the corrugated pipe can be directly sealed and connected to the reciprocating threaded shaft, and the other end can be sealed and connected to the sheath fixing member, which can also achieve the sealed connection between the sliding component and the sealing component.

[0089] The following takes the counterclockwise rotation of the knob 12 as an example for illustration. This illustration is only exemplary and does not constitute a limitation on the delivery system of this embodiment. In the initial state, the free end of the pressing rod 255 presses against the hemostatic seal 23, and the pressed hemostatic seal 23 will hold tightly the connecting rod 60 passing through it, thereby reducing the gap between the connecting rod 60 and the hemostatic seal 23 to achieve sealing, and at this time the connecting rod 60 cannot slide relative to the seal 23. When the knob 12 is rotated counterclockwise, the transmission gear unit 26 drives the seat 22 to move distally. At this time, the degree of extrusion of the pressing rod 255 on the hemostatic seal 23 decreases, and the extrusion force decreases; when the knob 12 is rotated counterclockwise one full turn, the seat 22 reaches the maximum distance of moving distally. At this time, the extrusion force of the pressing rod 255 on the hemostatic seal 23 drops to the minimum. At this time, the hemostatic seal 23 opens, the liquid can flow through, and the connecting rod 60 can slide freely; continuing to rotate the knob 12 counterclockwise, the seat 22 starts to move proximally. At this time, the degree of extrusion of the pressing rod 255 on the hemostatic seal 23 increases, and the extrusion force increases; when the knob 12 is rotated counterclockwise two full turns, the seat 22 returns to the starting position and enters the initial state. At this time, the extrusion force of the pressing rod 255 on the hemostatic seal 23 is the maximum. Continuing to rotate the knob 12 counterclockwise, the above process will be cycled, and the seat 22 will reciprocate back and forth along the longitudinal axis, thereby realizing the extrusion or release of the hemostatic seal 23.

[0090] See Figures 14 - 15As shown, the structure of the tension assembly 30 will be described. The tension assembly 30 includes a tension sleeve 31, an elastic member 32, a pointer carriage 33, a locking member 34, a tension pointer 35, and an adjustment knob 36. Among them, the locking member 34 is detachably sleeved on the outer peripheral surface of the adjustment knob 36 to achieve locking or unlocking. The tension sleeve 31 is fixed in the adjustment knob 36. The tension pointer 35 is fixedly connected to the pointer carriage 33. The pointer carriage 33 is slidably disposed in the tension sleeve 31 to drive the tension pointer 35 to slide relative to the adjustment knob 36. One end of the elastic member 32 abuts against the tension sleeve 31, and the other end abuts against the pointer carriage 33 to provide an elastic restoring force.

[0091] See Figures 16A - 16B As shown, the structure of the adjustment knob 36 will be described. The adjustment knob 36 is an overall rotating body structure that extends along the longitudinal axis with an open distal end and a closed proximal end. The distal end thereof is provided with an adjustment knob protrusion 366, and the adjustment knob protrusion 366 can cooperate with the housing groove 403 to realize the rotation of the adjustment knob 36 relative to the housing assembly 40. The interior of the adjustment knob 36 has a knob cavity 361, and pointer slider chutes 362 are provided on opposite sides of the inner wall of the knob cavity 361. A locking groove 364 is provided on the outer periphery of the adjustment knob 36. The locking groove 364 can be arranged in a circular shape (circumferential angle of 360 degrees) on the outer periphery of the adjustment knob 36, or can be arranged in a superior arc shape (circumferential angle greater than 180 degrees and less than 360 degrees) on the outer periphery of the adjustment knob 36. Long strip holes 363 are provided in both of the pointer slider chutes 362 on both sides. The two long strip holes 363 have the same shape and are through holes to communicate the knob cavity 362 with the outside. The distal end of the long strip hole 363 extends to the distal side edge of the pointer slider chute 362, and the proximal end extends and crosses the proximal side edge of the pointer slider chute 362 by a certain distance, and this distance is greater than or equal to the diameter of the tension pointer 35. An adjustment knob scale line 365 is further provided at the edge of the long strip hole 363. In other embodiments, the long strip hole can also be completely arranged within the pointer slider chute, that is, its length is less than or equal to the width of the pointer slider chute.

[0092] Continue to see Figure 14As shown, the tension pointer 35 includes a fixed section 351 and an indicating section 352 connected to the fixed section 351. A pointer mark 353 is provided at the free end of the indicating section 532, and the pointer mark 353 can be a groove, a raised mark, or a printed or colored mark. The locking member 34 is integrally formed in an annular shape with an opening, and its central angle is greater than 180 degrees and less than 360 degrees. The locking member 34 is engaged with the locking groove 364, and its width is less than or equal to the width of the locking groove 364. When the locking groove 364 is in a superior arc shape, the central angle of the locking member 34 is greater than 180 degrees and less than or equal to the central angle of the locking groove 364. After the locking member 34 is engaged in the locking groove 364, the tension pointer 35 can be locked so that it cannot slide in the long hole 363. In other embodiments, when the long hole is completely provided in the pointer slider chute, through holes or grooves are provided in the locking member 34 so that the locking member can be engaged with the locking groove and abut against the tension pointer to lock it. The elastic member 32 is a spring. In this embodiment, the spring is a cylindrical spring. In other embodiments, the spring can be a conical spring, a waist-shaped spring, or a spring with variable pitch. Among them, different forms of springs have different spring stiffnesses, and the stiffness can be constant or variable, and can be specifically selected according to actual needs. In other embodiments, the elastic member can also be an elastic rod, an elastic wire, or other elastically deformable structures.

[0093] In other embodiments, the locking structure includes a locking rod. One end of the locking rod is rotatably connected to the adjusting knob, and the other end is provided with a locking hook or a locking ring that can lock the tension pointer; when the locking rod is parallel to the longitudinal axis, the tension pointer can be locked. Specifically, the locking rod can rotate relative to the adjusting knob. When it rotates to a position parallel or substantially parallel to the longitudinal axis, the locking hook or the locking ring can hook or engage the tension pointer, so that the tension pointer cannot move along the longitudinal axis to achieve its locking. When unlocking is required, only need to rotate the locking rod to separate the locking hook or the locking ring from the tension pointer.

[0094] See Figure 17As shown in the figure, the structure of the pointer carriage 33 will be described. The pointer carriage 33 includes a main body rod 331 arranged radially. Symmetrically arranged on the upper and lower end faces of the main body rod 331 are first pointer sliders 332 that are slidably connected to the pointer slider chutes 362 in the knob cavity 361. A pointer fixing hole 336 is provided on the first pointer slider 332, and the pointer fixing hole 336 is connected to the fixed end 351 of the tension pointer 35. Thus, the two tension pointers 35 are respectively fixed to the first pointer sliders 332 on both sides through the pointer fixing holes 336. In this embodiment, the pointer fixing hole 336 is provided at the proximal end of the first pointer slider 332. In other embodiments, it can be provided at the distal end or the middle of the first pointer slider 332, and the specific position can be determined according to actual requirements. A connecting rod fixing hole 335 is provided in the middle of the main body rod 331, and the proximal end of the connecting rod 60 is fixed in the connecting rod fixing hole 335. On the side of the main body rod 331 opposite to the connecting rod fixing hole 335, a connecting rod 333 is vertically arranged relative to the main body rod 331, and second pointer sliders 334 are provided on both sides of the connecting rod 333. Among them, the second pointer slider 334 can be an integral structure that straddles the connecting rod 333 and is provided on both sides thereof, or can be two split structures respectively provided on the opposite outer peripheral surfaces of the connecting rod 333. The second pointer slider 334 forms a certain angle with the first pointer slider 332. In this embodiment, this angle is 90 degrees. In other embodiments, this angle can also be other angles, such as 45 degrees or 60 degrees. In other embodiments, the connecting rod can also be not provided and the second pointer slider can be directly provided on the main body rod.

[0095] See Figure 18 As shown in the figure, the tension sleeve 31 will be described. Symmetrically arranged on both sides of the outer peripheral surface of the tension sleeve 31 are two slider sliding surfaces 311. Among them, the slider sliding surface 311 is formed by removing a part of the structure of the outer peripheral surface of the tension sleeve 31. Of course, the slider sliding surface can also be integrally formed by injection molding or 3D printing, etc. On the slider sliding surface 311, first sleeve chutes 312 are symmetrically arranged. The two first sleeve chutes 312 are respectively provided on the two slider sliding surfaces 311 and are aligned in the radial direction. On the outer peripheral surface of the tension sleeve 31, two second sleeve chutes 313 are also symmetrically arranged. The connection line of the two first sleeve chutes 331 in the radial direction forms a certain angle with the connection line of the two second sleeve chutes 333 in the radial direction. This angle is equal to the angle of the second pointer slider 334 relative to the first pointer slider 332, so that the first pointer slider 332 is slidably arranged on the slider sliding surface 311 and the second pointer slider 334 is slidably arranged in the second sleeve chute 313, and at this time the main body rod 331 is slidably arranged in the first sleeve chute 312.

[0096] See Figures 14 - 15As shown in the figure, the assembly of the tension assembly 30 will be described. After the elastic member 32 is placed into the inner cavity of the tension sleeve 31, the pointer carriage 33 is slidably assembled onto the tension sleeve 31. Among them, the first pointer slider 332 and the second pointer slider 334 are provided to limit the rotational freedom of the pointer carriage 33 and prevent it from rotating relative to the tension sleeve 31. The two ends of the elastic member 32 respectively abut against the internal structure of the tension sleeve 31 and the pointer carriage 33, and the elastic member 32 can be compressed when the pointer carriage 33 slides relative to the tension sleeve 31. After the tension sleeve 31, the elastic member 32, and the pointer carriage 33 are assembled, the first pointer slider 332 is aligned with the pointer slider chute 362 of the adjustment knob 36 and then inserted into the knob cavity 361. Then, one end of the two tension pointers 35 is fixedly connected to the first pointer slider 332, and the other end passes through the long slot 363, so that the pointer mark 353 is exposed outside the long slot 363. The connecting rod 60 passes through the tension assembly 30 and is fixedly connected to the pointer carriage 33. The first pointer slider 332 of the pointer slider 33 slides in the button chute 362, the main body rod 331 slides in the first sleeve chute 312, and the second pointer slider 334 slides in the second sleeve chute 313. Since the tension sleeve 31 is fixed relative to the adjustment knob 36, pulling the connecting rod 60 to move distally and overcoming the acting force of the elastic member 32 can drive the pointer carriage 33 to slide distally relative to the tension sleeve 31, and the elastic member 32 can be further compressed. Among them, when the pointer carriage 33 slides, the tension pointer 35 slides in the long slot 363, and the pointer mark 353 at the free end of the tension pointer 35 will move relative to the adjustment knob scale line 365, so as to indicate the sliding progress of the pointer carriage 33 in the tension sleeve 31. Among them, at the starting position, that is, when the tension pointer 35 is at the nearest end of the long slot 363, the elastic member 32 is pre-compressed to provide a pre-pressure F of 0.3N - 0.6N. In this embodiment, the pre-pressure F can be taken as 0.4N.

[0097] In other embodiments, for the pointer carriage, only the first pointer slider may be provided without the second pointer slider. Correspondingly, the tension sleeve is not provided with the second sleeve chute. The first pointer slider may be only one, provided at one end of the main body rod. Correspondingly, a slider sliding surface cooperating with the first pointer slider is provided only on one side of the tension sleeve, and a pointer slider chute cooperating with the first pointer slider is provided on one side of the adjusting knob portion. In other embodiments, for the pointer carriage, only the second pointer slider may be provided without the first pointer slider. At this time, the tension pointer may be directly connected to the two free ends of the main body rod. Correspondingly, the tension sleeve is not provided with a slider sliding surface, and the adjusting knob portion is not provided with a pointer slider chute. The number of the second pointer sliders may be set to only one and the cooperating structure is changed accordingly. In other embodiments, for the pointer carriage, only the main body rod may be provided without the first pointer slider and the second pointer slider. Correspondingly, the tension sleeve is only provided with the first sleeve chute, and the adjusting knob portion is not provided with a pointer slider chute. In other embodiments, a tension pointer may be fixedly provided only on one side of the main body rod. Correspondingly, a long hole is provided only on one side of the adjusting knob.

[0098] See Figure 19 As shown, the structure of the implant device 2 will be described. The implant device 2 includes an inner disk 2D and an outer disk 2C connected thereto. At the proximal end of the outer disk 2C, there is a connecting portion 2A which is in the shape of a sleeve and has an internal thread therein, and the internal thread cooperates with the external thread at the distal end of the connecting rod 60 to achieve the threaded connection between the implant device 2 and the connecting rod 60.

[0099] See Figures 20A - 20B As shown, the operation process of the conveyor and its system in this embodiment will be described. The conveyor in this example is used as a vascular closure device to deliver the occlusion disk to the vascular incision to achieve the closure of the vascular incision, but it does not mean that the conveyor only includes a vascular closure device.

[0100] The operation of the entire delivery system includes the following steps: Installing the implant device 2: After threading the implant device 2 onto the connecting rod 60, the implant device 2 is retracted into the sheath 200; Intervening in the blood vessel 300: After establishing a channel through the outer sheath, etc., the distal end of the sheath 200 enters the blood vessel 300 through this channel; Confirming the position of the implant device 2: The three-way valve 51 is connected to the syringe, the three-way valve switch is opened, and the syringe is slowly withdrawn. When it is observed that the blood drawn back into the hose 52 is continuous and there are no bubbles, it means that the implant device has been delivered into the blood vessel 300 at this time; Releasing the inner disk 2D: Rotate the adjusting wheel 12 counterclockwise, and the second mark 4311 on the indicating slider 43 starts to slide from the most distal end of the strip-shaped through hole 414. At this time, the hemostatic seal 23 opens, and the connecting rod 60 can move relative to the housing assembly 40. See Figure 20AAs shown, when the second mark 4311 is aligned with the first mark 405 on the shell assembly 40, the inner disk 2D of the implant device 2 is released; to release the outer disk 2C: remove the locking piece 34, the rear side of the conveying system 3 as a whole, at this time the connecting rod 60 is pulled distally by the implant device 2, and the tension pointer 35 is observed while retreating until the tension pointer 35 starts to start under the drive of the connecting rod 60, and then the retreat is stopped. Observe the three-way valve 51, at this time the three-way valve 51 stops dripping blood (stop dripping blood, indicating that the implant device is anchored at the puncture port). Continue to slowly withdraw the handle 100, when the pointer mark 353 of the tension pointer 35 is aligned with the scale line 365 of the adjustment knob, the outer disk 2C is released; the operator determines whether the outer disk 2C is successfully positioned by the movement of the tension pointer 35; stroke reset: continue to rotate the adjustment wheel 12 counterclockwise, see Figure 20B As shown, when the second mark 4311 is aligned with the proximal end of the strip through hole 414, the stroke is reset, and the hemostatic seal 23 is closed, holding the connecting rod 60 tightly, and the connecting rod 60 cannot move relative to the housing assembly 40. The stroke reset indicates that the sealing sleeve assembly 27 returns to the initial position relative to the three-way sleeve 25. Confirm the release position: the three-way valve 51 is connected to the syringe, the three-way valve switch is turned on, and the syringe is slowly withdrawn. It is observed that a section of blood plus a section of bubbles, or all air, is withdrawn from the hose 52, that is, the implant device 2 has been released at the puncture port position. If it is found that the release position of the implant device 2 is deviated, the adjustment wheel 12 can be rotated clockwise to retract the implant device 2 into the sheath 200, and the action of releasing the inner disk 2D and the outer disk 2C is repeated until the implant device 2 is installed in the predetermined position; withdraw the delivery system 3: rotate the adjustment knob 36 counterclockwise, the distal end of the connecting rod 60 is disengaged from the implant device 2, and the delivery system 3 is withdrawn to the outside of the body, and the operation is completed.

[0101] It should be noted that the initial position of the tension pointer 35 is at the nearest end of the long strip hole 363. At this time, the elastic member 32 is pre-compressed to provide a predetermined pre-pressure. This pre-pressure acts on the pointer carriage 33 in the proximal direction. For the pointer carriage 33, on the one hand, it abuts against the elastic member 33 and is subjected to the pre-pressure of the elastic member 32 in the proximal direction; on the other hand, the pointer carriage 33 is fixedly connected to the connecting rod 60. When the connecting rod 60 is tensioned, the pointer carriage 33 will be subjected to the pulling force of the connecting rod 60 in the distal direction. Therefore, only when this pulling force is greater than the pre-pressure can the pointer carriage 33 overcome the pre-pressure of the elastic member 32 and continue to compress the elastic member 32. For the connecting rod 60, since one end of it is fixedly connected to the implant device 2 and the other end is fixedly connected to the pointer carriage 33, when the handle 100 is retracted, both ends of the connecting rod 60 will be subjected to two pulling forces in opposite directions acting on the pointer carriage 33 and the implant device 2. When the implant device 2 enters the blood vessel and the handle 100 is retracted, when the implant device 2 is not anchored at the puncture site, the frictional force or blood flow impact force received by the implant device 2 is less than the pre-pressure, and the pulling force acting on the connecting rod 60 is also less than the pre-pressure. This pulling force cannot continue to compress the elastic member 32 to cause the pointer carriage 33 to start; only when the inner disc of the implant device 2 is anchored at the puncture site can the pulling force of the implant device 2 acting on the connecting rod 60 be greater than the pre-pressure to overcome the pre-pressure of the elastic member 32 and cause the pointer carriage 33 to start.

[0102] In other embodiments, the implant device can also be other medical devices, such as a left atrial appendage occluder, an atrial septum / ventricular septum occluder, a filter, or a vascular stent.

[0103] For the invention, the tension assembly is not necessary, but can be changed according to different implant devices to be delivered. In other embodiments, the proximal end of the connecting rod is fixedly connected to the housing assembly, that is, the connecting rod is fixed relative to the housing assembly, and the release of the implant device, such as a vascular stent, can be achieved by retracting the sheath; in other embodiments, the sliding assembly is not provided, and at this time, the sheath connecting member is fixedly connected to the housing assembly; the proximal end of the connecting rod passes through the housing assembly and is connected to the pushing handle. The release of the implant device, such as a left atrial appendage occluder, can be achieved by driving the connecting rod to move in the sheath through the pushing handle.

[0104] Second Embodiment

[0105] The conveyor in this embodiment is basically the same as the structure in the first embodiment, only the structure of the sealing sleeve assembly is different. Among them, the structures in this embodiment that are the same as those in the first embodiment and its deformations can be referred to the first embodiment and will not be elaborated here. This embodiment mainly introduces the structures different from those in the first embodiment. See Figure 21As shown, the difference between the sealing sleeve assembly 27A in this embodiment and the sealing sleeve assembly 27 in the first embodiment lies in that the sealing sleeve assembly in the first embodiment is fixedly connected by a reciprocating threaded shaft and a shaft seat in a two-piece form, while the sealing sleeve assembly in this embodiment is an integral structure. Specifically, the sealing sleeve member 27A has a main cavity, which includes a distal connection hole 271A, an intermediate connection hole 272A, and a proximal connection hole 273A connected in sequence. Among them, the diameter of the intermediate connection hole 272A is smaller than that of the distal connection hole 271A and the proximal connection hole 273A, thus forming a stepped hole. A first stepped step 278A is formed at the connection between the intermediate connection hole 272A and the distal connection hole 271A, and a second stepped step 279A is formed at the connection between the intermediate connection hole 272A and the proximal connection hole 273A. The communication pipe 70 is installed in the distal connection hole 271A, and the first stepped step 278A is used for axially limiting the communication pipe 70. In other embodiments, the distal connection hole 271A and the intermediate connection hole 272A can also be set as holes with the same diameter (at this time, the distal connection hole 271A and the intermediate connection hole 272A with the same diameter together form the distal connection hole), and structures such as protrusions are provided on the communication pipe 70 to achieve axial limitation. The hemostatic seal 23 is installed in the proximal connection hole 273A, and the second stepped step 279A constitutes a sealing gasket bearing step for axially limiting the hemostatic seal 23. A radial groove 276A is formed on the proximal end surface of the sealing sleeve assembly 27A. A passage hole 275A is formed between the main cavity and the outer surface of the sealing sleeve assembly 27A. The passage hole 275A constitutes a bypass channel radially offset from the main cavity. The passage hole 275A extends along the longitudinal axis, and one end thereof communicates with the radial groove 226A, and the other end crosses the second stepped step 279A and communicates with the intermediate connection hole 272A. Liquid can enter the distal connection hole 271A and then enter the communication pipe 70 through the radial groove 276A, the passage hole 274A, and the intermediate connection hole 272A.

[0106] Third Embodiment

[0107] The conveyor in this embodiment is basically the same as that in the first embodiment, except for the structure of the tension assembly.

[0108] See Figure 22 As shown, the tension assembly 80 includes a tension sleeve 81, an elastic member 82, a pointer carriage 83, a locking member 84, and a tension pointer 85. The locking member 84 is sleeved on the outer peripheral surface of the adjustment knob 86 to achieve locking or unlocking. The elastic member 82, the locking member 84, and the adjustment knob 86 in this embodiment are basically the same as those in the foregoing embodiments, and the specific structure thereof will not be described in detail herein. Among them, the adjustment knob 86 in this embodiment also includes a pointer slider chute (not shown in the figure) and a long hole 861.

[0109] SeeFigure 23 As shown in the figure, the structure of the tension sleeve 81 will be described. For the convenience of installation and manufacturing, the tension sleeve 81 is divided into two half sleeves from the middle position, and the two form the tension sleeve 81 after assembly. Figure 23 The figure shows a half structure of the tension sleeve 81.

[0110] Specifically, the proximal end of the tension sleeve 81 has a sleeve through groove 814 that penetrates both sides of its outer periphery and its proximal end face, and hinge holes 813 are provided on both sides of the through groove 814. On the distal side of the tension sleeve 81, there is a receiving groove 811, and the receiving groove 811 penetrates the through groove 814. On the inner walls of the opposite sides of the receiving groove 811, there are sleeve chutes 812. The sleeve chutes 812 are arranged parallel to the receiving groove 811, and their lengths can be equal to or shorter than the length of the receiving groove 811. A sleeve inclined surface 815 is provided at the proximal end of the tension sleeve 81, and the sleeve inclined surface 815 makes one end face of the tension sleeve 81 inclined relative to the longitudinal axis. In other embodiments, the through groove 814 may not be provided, and the hinge holes 813 may be directly provided on the outer periphery of the tension sleeve 81.

[0111] In other embodiments, the sleeve through groove may not penetrate to the proximal end face of the tension sleeve, and only penetrate one side instead of both sides in the radial direction, as long as the sleeve through groove can provide a moving space for the tension pointer and the free end of the tension pointer can extend into the long hole of the adjusting knob along the sleeve through groove from the tension sleeve.

[0112] Refer to Figure 24 As shown in the figure, the structure of the pointer carriage 83 will be described. The pointer carriage 83 includes a sliding rod 831, and carriage protrusions 832 that match the sleeve chutes 812 are respectively provided on both sides of the sliding rod 831, so that the pointer carriage 83 can slide relative to the tension sleeve 81. A hooking portion 833 is provided on the proximal side of the sliding rod 831. The hooking portion is in a "spoon shape", and the inclination of its distal end is adapted to the sleeve inclined surface 815, so that the distal side of the hooking portion 833 can abut against the sleeve inclined surface 815. The hooking portion 833 can be integrally provided with the sliding rod 831 or fixedly connected after being separately provided.

[0113] Refer to Figure 25 As shown in the figure, the structure of the tension pointer 85 will be described. The tension pointer 85 includes a pointer connecting portion 853, and pivot shafts 852 are respectively provided on both sides of it. The pivot shafts 852 cooperate with the hinge holes 813 to enable the tension pointer 85 to be hinged to the tension sleeve 81. One end of the pointer connecting portion 85 is provided with a pointer rod 851, and a pointer mark 854 is provided at the free end of the pointer rod 851.

[0114] In other embodiments, the tension sleeve may not be provided with a through groove, and the hinge hole may be directly provided on the outer periphery of the tension sleeve. In other embodiments, the carriage protrusion of the pointer carriage may be only provided on one side of the sliding rod. Correspondingly, a sleeve chute that cooperates with the carriage protrusion is provided on one side of the receiving groove. In other embodiments, the pivot is only provided on one side of the pointer connecting portion. Correspondingly, a hinge hole that cooperates with the pivot is only provided on one side of the through groove.

[0115] See Figure 26A As shown, the tension sleeve 81 is fixedly installed in the adjustment knob 86. The pointer carriage 83 passes through the elastic member 32 and then slides in the tension sleeve 81. The elastic member 82 is arranged in the receiving groove 811 of the tension sleeve 81. One end of the elastic member 82 abuts against the stepped end surface that forms the receiving groove 811, and the other end abuts against the carriage protrusion 832 to provide an elastic restoring force. The tension pointer 85 is rotatably connected to the hinge hole 813 through the pivot 852 in the through groove 814 of the tension sleeve 81. And the lower end of the tension pointer 85 abuts against the hooking portion 833 and is hooked by the hooking portion. The pointer mark 854 passes through and is exposed outside the long slot 861. The connecting rod 60 passes through the tension sleeve 81 and the elastic member 82 and is fixedly connected to the pointer slider 83. Among them, during the rotation of the tension pointer 85 relative to the tension sleeve 81, its lower end is limited in the hooking portion 833, and the pointer mark 854 is limited in the long slot 861 to ensure that its lower end will not break away from the hooking portion 833.

[0116] See Figure 26B As shown, after unlocking the locking member 84, when the connecting rod 60 is subjected to a pulling force towards the distal end, the connecting rod 60 drives the pointer carriage 83 to compress the elastic member 82 and move towards the distal end. Its hooking portion 833 drives the tension pointer 85 to rotate relative to the tension sleeve 81, so that the pointer mark 854 of the tension pointer 85 rotates from the distal end to the proximal end of the long slot 861 to complete the tension prompting function.

[0117] Fourth Embodiment

[0118] The conveyor in this embodiment is basically the same as the structure in the first embodiment, only the structure of the sealing sleeve assembly is different.

[0119] See Figure 27As shown, the structure of the three-way sleeve 25a in this embodiment is basically the same as that in the first embodiment, including a main pipe 251a and a branch pipe 252a that are interconnected. Specifically, the branch pipe 252a communicates with the inner cavity of the main pipe 251a through a branch connection port 253a. In this embodiment, the bottom surface 254a of the cavity of the three-way sleeve 25 is a plane, and a pressure rod 255a extending along the longitudinal axis is provided on the bottom surface 254 of the cavity. The shaft seat 22a is the same as that in the first embodiment, and also includes a through-hole 222a extending along the longitudinal axis provided between its inner wall and outer surface. Different from the first embodiment, a proximal convex structure 221a is further provided on the proximal end surface of the shaft seat 22a in this embodiment. When the shaft seat 22a is assembled into the three-way sleeve 25a, the free end surface 223a of the proximal convex structure 221a abuts against the bottom surface 254a of the cavity, so that there is a gap between the proximal end surface of the shaft seat 22a and the bottom surface 254a of the cavity, and this gap communicates with the through-hole 222a. After the liquid enters the three-way sleeve 25a through the branch pipe 252a, due to the existence of this gap, it will flow into this gap and then enter the through-hole 222a through this gap. The proximal convex structure 221a in this embodiment is provided at the center position of the proximal end surface of the shaft seat 22a, so it has a hollow hole for the pressure rod 255a to pass through. In other embodiments, the proximal convex structure can also be provided at a position radially offset relative to the central axis to prevent the shaft seat convex structure from blocking the pressure rod from entering the inner cavity of the shaft seat. At this time, the proximal convex structure does not need to be provided with a hollow hole for the pressure rod to pass through.

[0120] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. The protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A tension indicator for a conveyor for delivering medical devices, characterized in that, it includes: An adjustment knob with a knob cavity inside and a long hole extending along the longitudinal axis on the outside that penetrates the knob cavity to the outside; A tension sleeve fixedly arranged in the knob cavity; A pointer carriage slidably arranged in the tension sleeve; An elastic member arranged in the tension sleeve, and both ends thereof are respectively abutted against the tension sleeve and the pointer carriage; A tension pointer, one end of which is connected to the pointer carriage, and the other end passes through the long hole and can move relative to the long hole; A connecting rod, the proximal end of which passes through the tension sleeve and is fixed to the pointer carriage.

2. The tension indicator according to claim 1, characterized in that, The adjustment knob is further provided with a locking structure that can lock the tension pointer relative to the long hole.

3. The tension indicator according to claim 2, characterized in that, The locking structure includes a locking groove arranged on the outer periphery of the adjustment knob and a locking member detachably connected in the locking groove, and part or all of the long hole is arranged in the locking groove.

4. The tension indicator according to claim 2, characterized in that, The locking structure includes a locking rod, one end of the locking rod is rotatably connected to the adjustment knob, and the other end is provided with a locking hook or a locking ring that can lock the tension pointer; when the locking rod is parallel or substantially parallel to the longitudinal axis, the tension pointer can be locked.

5. The tension indicator according to claim 1, characterized in that, First sleeve chutes are symmetrically arranged on both sides of the tension sleeve; the pointer carriage includes a main body rod arranged radially, the main body rod can be slidably arranged in the first sleeve chute and a tension pointer is fixedly connected to the end thereof; when the main body rod slides, it can drive the tension pointer to translate relative to the long hole.

6. The tension indicator according to claim 5, characterized in that, The main body rod is provided with a first pointer slider, and a pointer slider chute that cooperates with the first pointer slider is arranged on the inner wall of the knob cavity; on the outer periphery of the tension sleeve and at the position of the first sleeve chute, a slider sliding surface that cooperates with the first pointer slider is arranged, and the first pointer slider can slide between the outer wall of the tension sleeve and the inner wall of the adjustment knob.

7. The tension indicator according to any one of claims 5-6, characterized in that, The pointer carriage further includes a second pointer slider vertically arranged on the main body rod; a second sleeve chute extending along the longitudinal axis is further arranged on the tension sleeve, and the second pointer slider is slidably arranged in the second sleeve chute.

8. The tension indicator according to claim 1, characterized in that, The tension sleeve is provided with a receiving groove and a sleeve through groove communicating with the receiving groove. The sleeve through groove penetrates the tension sleeve in the radial direction. The elastic member is received in the receiving groove, and the pointer carriage is slidably disposed in the receiving groove; the tension pointer is received and hinged in the sleeve through groove, and its free end can extend out of the tension sleeve along the sleeve through groove.

9. The tension indicator according to claim 8, wherein, a hinge hole is provided on the inner wall of the sleeve through groove, and at least one side of the tension pointer is provided with a pivot shaft rotatably connected to the hinge hole.

10. The tension indicator according to claim 8, wherein, the pointer carriage includes a sliding rod, and at least one side of the sliding rod is provided with a carriage protrusion, and a sleeve sliding groove cooperating with the carriage protrusion is provided in the receiving groove.

11. The tension indicator according to claim 10, wherein, the pointer carriage includes a hooking portion connected to the proximal end of the sliding rod, and the hooking portion is connected to one end of the tension pointer; when the sliding rod slides, the tension pointer can be driven to rotate relative to the long slot.

12. The tension indicator according to any one of claims 1-11, wherein, when the tension pointer is at the nearest end of the long slot, the elastic member is pre-compressed to provide a pre-pressure.

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