Stent implanter driving mechanism and medical stent implantation device

Abstract

The present invention discloses a stent implanter driving mechanism and a medical stent implanting device, comprising an outer tube clamping mechanism suitable for clamping an outer tube and an axial displacement driving mechanism suitable for driving the outer tube to move, wherein the outer tube clamping mechanism comprises an outer sleeve fixedly sleeved on the outer tube, and a pressure block connected to the outer sleeve; the axial displacement driving mechanism comprises a transmission assembly matched with the pressure block to drive the pressure block to move, and a power unit connected to the transmission assembly; that is, the power unit is suitable for driving the transmission assembly to drive the pressure block to move while realizing the synchronous movement of the outer tube; the transmission assembly comprises an annular synchronous structure, and a passive rotating wheel and an active rotating wheel matched with the annular synchronous structure; wherein the active rotating wheel is matched with the power unit to be suitable for being driven by the power unit to drive the active rotating wheel to rotate. The medical stent implanting device of the present invention can improve the flexibility during the stent implanting operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a stent implanter driving mechanism and a medical stent implanting device. Background Art

[0002] There are two main operating modes for stent release and implantation commonly used in the prior art: one is the traditional linear motion push-type stent release operating mode, in which the doctor holds the instrument with one hand and pulls the release device with the other hand to linearly release the stent. During the stent release process of this operating mode, the doctor needs to control two handles (a fixed handle and a movable handle) at the same time, with the fixed handle remaining stationary and the movable handle retracted to achieve movement of the outer tube relative to the inner tube and release the stent. During this process, firstly, excessive operating force can easily cause the outer tube to retract far, resulting in excessive release of the stent, causing the stent to be released at the wrong position. Secondly, since the doctor operates with both hands, there is relative movement between the two hands, and the fixed position of the fixed handle is unreliable, which can also easily lead to inaccurate stent release position, affecting the accuracy of the operation and the treatment effect of the stent. The other is a gun-type structure that uses reciprocating motion to release the stent. This operation method realizes the release of the stent with one hand. Since there is a long distance between the gun-type handle and the stent release position, and the inner and outer tubes are flexible tubes, the inner and outer tube parts outside the human body cavity cannot be fixed. Handle operation can easily cause shaking and displacement of the inner and outer tubes, making it difficult to accurately control the stent release position. Secondly, for the reverse process of stent release and recovery, a separate reversing mechanism is required to achieve reversing operation, which is complicated to operate and cannot achieve a stop-and-return operation, affecting the progress of the operation and requiring high operation of the doctor. Summary of the invention

[0003] The first object of the present invention is to provide a stent implanter driving mechanism to solve the technical problem of improving the flexibility of the outer tube moving operation process.

[0004] The second object of the present invention is to provide a medical stent implantation device to solve the technical problem of improving the flexibility of the stent implantation operation process.

[0005] The stent implanter driving mechanism of the present invention is implemented as follows:

[0006] A stent implanter driving mechanism, applicable to a medical stent implanter, comprising:

[0007] An outer tube clamping mechanism, the outer tube clamping mechanism comprising an outer sleeve fixedly sleeved on the outer tube, and a pressing block connected to the outer sleeve;

[0008] The axial shift driving mechanism comprises a transmission assembly which cooperates with the pressing block to drive the pressing block to move, and a power unit connected to the transmission assembly; that is, the power unit is suitable for driving the transmission assembly to drive the pressing block to move while realizing the synchronous movement of the outer tube; the transmission assembly comprises an annular synchronous structure, and a passive rotating wheel and an active rotating wheel matched with the annular synchronous structure; wherein the active rotating wheel is matched with the power unit so as to be suitable for the active rotating wheel to be driven to rotate by the power unit.

[0009] In a preferred embodiment of the present invention, the annular synchronous structure passes between the end faces of the outer sleeve and the pressing block, that is, the annular synchronous structure is pressed by the matching of the outer sleeve and the pressing block so that the annular synchronous structure can drive the pressing block and the outer sleeve to move.

[0010] In a preferred embodiment of the present invention, the annular synchronous structure adopts a synchronous belt;

[0011] The inner side wall of the synchronous belt is provided with tooth-shaped parts which are arranged continuously; and

[0012] The outer side walls of the passive rotating wheel and the active rotating wheel are provided with toothed structures suitable for meshing and connecting with the toothed parts; and

[0013] A toothed portion adapted to mesh with the toothed portion is provided on the end surface of the pressing block that is matched with the outer sleeve.

[0014] In a preferred embodiment of the present invention, the power unit adopts a rotating hand wheel fixedly connected to the driving rotating wheel.

[0015] The medical stent implantation device of the present invention is implemented as follows:

[0016] A medical stent implantation device comprises: a middle tube, an operating handle fixedly connected to the middle tube, an inner tube arranged inside the middle tube, and an outer tube arranged outside the middle tube; wherein

[0017] The operating handle is provided with the stent implanter driving mechanism; and

[0018] The inner tube passes through the outer sleeve of the stent implanter drive mechanism; and the stent implanter drive mechanism is suitable for driving the outer tube to move linearly back and forth along the axis of the inner tube;

[0019] A bracket is arranged between the inner tube and the outer tube.

[0020] In a preferred embodiment of the present invention, the stent implanter drive mechanism further comprises a locking mechanism adapted to lock the transmission assembly;

[0021] The locking mechanism includes an annular toothed disc disposed inside the operating handle and coaxially connected to the driving rotating wheel of the transmission assembly so as to be adapted to rotate synchronously with the driving rotating wheel, and a locking button adapted to abut against the annular toothed disc to lock the rotation of the annular toothed disc; wherein

[0022] At least one tooth groove is evenly distributed along the circumference of one end surface of the annular gear disk, wherein the tooth groove is formed by adjacent tooth keys; and

[0023] A button tooth profile suitable for meshing and matching with the annular tooth groove is provided on the portion of the locking button used for abutting against the annular tooth disk.

[0024] In a preferred embodiment of the present invention, a receiving groove suitable for assembling the locking button is further provided inside the operating handle;

[0025] The two side walls of the receiving groove perpendicular to the axial direction of the annular gear disc are respectively provided with notches suitable for the locking button to extend partially; wherein

[0026] The notch on the side of the receiving groove away from the annular gear disc is formed on the side wall of the operating handle;

[0027] The button tooth profile is located at the locking button and extends out of the receiving groove through a notch on the side of the receiving groove facing the annular gear disk.

[0028] In a preferred embodiment of the present invention, an annular flange is further provided on the outer side wall of the locking button and is adapted to abut against the edge of the notch on the side of the accommodating groove away from the annular toothed disc from one side of the accommodating groove; and

[0029] A spring body is also sleeved on the outer side of the locking button;

[0030] One axial end of the spring body is suitable for abutting against the edge of the notch of the accommodating groove facing the annular gear plate from one side of the accommodating groove, and the other axial end of the spring body is suitable for abutting against the annular flange from one side of the accommodating groove.

[0031] In a preferred embodiment of the present invention, a guide rail is provided on the inner wall of the operating handle and is distributed along the axial direction of the inner tube; and

[0032] A guide groove suitable for matching with the guide rail is provided on the end surface of the outer sleeve of the stent implanter driving mechanism facing the guide rail.

[0033] In a preferred embodiment of the present invention, a positioning ring is provided on the side wall of the portion of the middle tube away from the operating handle;

[0034] The positioning ring is suitable for being matched with a lasso arranged at the end of the bracket facing the middle tube.

[0035] The beneficial effects of the present invention are as follows: the stent implanter driving mechanism and the medical stent implanting device of the present invention drive the transmission assembly through the power unit to drive the movement of the pressure block and realize the synchronous movement of the outer tube. During this process, the reciprocating motion of the outer tube can be flexibly realized by controlling the power unit, and during this process, as long as the power unit is not operated, the outer tube will also stop moving. In this way, the movement process of the outer tube can be controlled to achieve stop-and-go regulation, thereby improving the precise control of the movement trajectory of the outer tube to improve the accuracy of stent implantation positioning and the flexibility of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the medical device implantation device of the present invention;

[0038] Figure 2 is a schematic diagram of a stent implanter driving mechanism of the present invention;

[0039] Figure 3 It is a structural schematic diagram of the matching state of the locking button and the annular gear disc of the present invention;

[0040] Figure 4 It is a structural schematic diagram of the containing tank of the present invention;

[0041] Figure 5 It is a schematic diagram of the cooperation between the pressing block, the outer sleeve and the synchronous belt of the present invention;

[0042] Figure 6 is a schematic diagram of the perforation of the outer sleeve of the present invention;

[0043] Figure 7 It is a schematic diagram of the matching structure of the pressing block and the outer sleeve of the present invention;

[0044] Figure 8 It is a schematic diagram of the button tooth profile of the present invention and the tooth groove of the annular toothed disc in a meshing state;

[0045] Fig. 9 is a schematic diagram of the main structure of the medical device implantation device of the present invention;

[0046] Fig.10 yes Fig. 9 A schematic cross-sectional view in the direction of G;

[0047] Fig.11 is a schematic diagram of the internal structure of the medical device implant device of the present invention;

[0048] Fig.12 yes Fig.11 A magnified schematic diagram of part A;

[0049] Fig.13 is a schematic diagram of the cooperation between the bracket and the middle tube of the present invention;

[0050] Fig.14 It is a schematic diagram of the structure of the bracket and the lasso of the present invention;

[0051] Fig.15 It is a schematic diagram of the structure when the positioning ring of the present invention is an inclined cut;

[0052] Fig.16 It is a structural schematic diagram when the positioning ring of the present invention is a reverse hook structure.

[0053] In the figure: outer sleeve 101, perforation 1011, guide groove 1012, pressure block 102, toothed portion 1021, active rotor 103, synchronous belt 104, toothed portion 1041, passive rotor 105, rotating hand wheel 106, clamping nut 107, hollow inner cavity 108, screw 109, toothed structure 110, connecting shaft 111, middle tube 200, positioning ring 201, inclined cutout 2011, hook structure 2012, operating handle 300, accommodating groove 301, notch 302, guide rail 303, inner tube 400, outer tube 500, bracket 600, lasso 602, hand-held tube 700, annular toothed disc 800, tooth groove 801, locking button 900, button tooth profile 901, annular flange 902, spring body 1000. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0057] Embodiment 1:

[0058] like Figures 1 to 11 As shown, this embodiment provides a stent implanter driving mechanism, which is suitable for a medical stent implantation device, and includes: an outer tube clamping mechanism suitable for clamping an outer tube 500 and an axial shift driving mechanism suitable for driving the outer tube 500 to move. The outer tube clamping mechanism includes an outer sleeve 101 fixedly sleeved on the outer tube 500, and a pressing block 102 connected to the outer sleeve 101. The axial shift driving mechanism includes a transmission assembly that cooperates with the pressing block 102 to drive the pressing block 102 to move, and a power unit connected to the transmission assembly; that is, the power unit is suitable for driving the transmission assembly to drive the pressing block 102 to move while realizing the synchronous movement of the outer tube 500; the transmission assembly includes an annular synchronous structure, and a passive rotating wheel 105 and an active rotating wheel 103 matched with the annular synchronous structure; wherein the active rotating wheel 103 is matched with the power unit so that the active rotating wheel 103 is driven by the power unit to rotate.

[0059] Since the medical stent implantation device is operated by the doctor's hands during the specific operation process, in order to improve the convenience of hand operation, the power unit of this embodiment adopts a rotating handwheel 106 fixedly connected to the active rotating wheel 103, that is, the rotation of the active rotating wheel 103 is achieved by rotating the rotating handwheel 106.

[0060] In addition, the outer sleeve 101 has a through hole 1011 suitable for the outer tube 500 to pass through, that is, the outer tube 500 and the outer sleeve 101 are relatively fixed through the fixed connection between the through hole 1011 and the outer tube 500, so that the outer sleeve 101 can drive the outer tube 500 to move synchronously. Here, one optional situation is that the through hole 1011 and the outer tube 500 are interference-fitted to improve the stability and firmness of the two after the two are matched; another optional situation is that the through hole 1011 and the outer tube 500 are welded and fixedly connected; another optional situation is that the outer tube 500 uses a clamping nut 107 to achieve a firm fit between the outer tube 500 and the through hole 1011. In conjunction with the drawings of this embodiment, this embodiment takes the structure of the clamping nut 107 as an example, and the clamping nut 107 used in this embodiment has a hollow inner cavity 108 that is coaxially connected with the outer tube 500. Such a hollow inner cavity 108 is also convenient for the inner tube 400 to smoothly pass through the hollow inner cavity 108 and be inserted into the inner part of the outer tube 500. Here, the inner thread of the clamping nut 107 can be matched with the thread of the outer tube 500, and the outer thread of the clamping nut 107 is matched with the through hole 1011 of the outer sleeve 101. The reason why the present embodiment adopts the method of sleeve-mounting the outer sleeve 101 on the outside of the outer tube 500 to achieve the fixed connection between the outer sleeve 101 and the outer tube 500 is that when the stent implanter driving mechanism of the present embodiment is applied to the medical stent implantation device, the matching structure between the inner tube 400 and the outer tube 500 will not be affected by the structure of the outer sleeve 101. In other words, the stent implanter driving mechanism of the present embodiment will not affect the matching structure between the inner tube 400 and the outer tube 500 commonly used in the conventional prior art, which can also achieve the effect of reducing R&D costs and processing costs.

[0061] The cooperation between the outer sleeve 101 and the pressing block 102 can be an integrally formed structure, or can be assembled and fixed between the two by, for example, but not limited to, screws 109. In this embodiment, the pressing block 102 and the annular synchronous structure are also assembled. In order to simplify the process and assembly process, the outer sleeve 101 and the pressing block 102 of this embodiment are matched by screws 109 so that the two can move synchronously, and the annular synchronous structure passes between the end faces of the outer sleeve 101 and the pressing block 102, that is, the annular synchronous structure is pressed by the matching of the outer sleeve 101 and the pressing block 102 so that the annular synchronous structure can drive the pressing block 102 and the outer sleeve 101 to move. That is to say, the outer sleeve 101 and the pressing block 102, as well as the pressing block 102 and the annular synchronous structure are all achieved by screws 109, and the locking and fixing of the pressing block 102 and the annular synchronous structure is completed while the screws 109 are used to lock the outer sleeve 101 and the pressing block 102. Such a structure simplifies the process and reduces the production cost.

[0062] The annular synchronous structure of this embodiment can be a synchronous chain or a synchronous belt 104. In conjunction with the drawings, this embodiment only takes the synchronous belt 104 as an example, but the synchronous belt 104 is not limited to the only optional implementation mode of the present invention.

[0063] Taking the structure of the synchronous belt 104 as an example, in detail, the inner wall of the synchronous belt 104 of this embodiment is provided with toothed portions 1041 arranged continuously; the "inner wall" here specifically refers to the side end of the synchronous belt 104 facing the center of the annular structure; correspondingly, the outer wall of the passive rotating wheel 105 and the active rotating wheel 103 is provided with a toothed structure 110 suitable for meshing and connecting with the toothed portion 1041, so that the power unit drives the active rotating wheel 103 to rotate and the synchronous belt 104 can be realized. In this structure, in order to improve the firmness and stability of the connection between the pressing block 102 and the synchronous belt 104, a toothed portion 1021 suitable for meshing and connecting with the toothed portion 1041 is provided on the end surface of the pressing block 102 and the outer sleeve 101.

[0064] Embodiment 2:

[0065] like Figures 1 to 16 As shown, based on the stent implanter driving mechanism of Example 1, this embodiment provides a medical stent implanting device, comprising: a middle tube 200, an operating handle 300 fixedly connected to the middle tube 200, an inner tube 400 arranged inside the middle tube 200, and an outer tube 500 arranged outside the middle tube 200; wherein the operating handle 300 is provided with the stent implanter driving mechanism of Example 1; and the inner tube 400 passes through the outer sleeve 101 of the stent implanter driving mechanism; and the stent implanter driving mechanism is suitable for driving the outer tube 500 to reciprocate along the axis of the inner tube 400 in a straight line; and a stent 600 is provided between the inner tube 400 and the outer tube 500. In addition, the operating handle 300 is also fixedly connected with a hand-held tube 700 sleeved on the outside of the outer tube 500.

[0066] In simple terms, the inner tube 400, the middle tube 200, the hand-held tube 700 are fixedly connected to the operating handle 300, the outer tube 500 can realize reciprocating linear motion along the axis of the inner tube 400, the bracket 600 is located between the inner tube 400 and the outer tube 500 after compression, the middle tube 200 is used to position the bracket 600, and the outer tube 500 moves forward and backward relative to the operating handle 300 to realize the recovery and release of the bracket 600, the hand-held tube 700 is located outside the outer tube 500, and during the release process, the hand-held tube 700 is fixed; the rotating hand wheel 106 is set on the operating handle 300. The active rotating wheel 103, the passive rotating wheel 105 and the synchronous belt 104 of the stent implanter driving mechanism are all arranged inside the operating handle 300, and form a rotational matching relationship with the inner wall of the operating handle 300, that is, the active rotating wheel 103 and the passive rotating wheel 105 can rotate smoothly relative to the inner wall of the operating handle 300. Optionally, the active rotating wheel 103 and the passive rotating wheel 105 are respectively connected to the inner wall of the operating handle 300 through a connecting shaft 111.

[0067] It is also necessary to further explain that the matching structure and operation principle between the inner tube 400, the middle tube 200, the outer tube 500 and the stent 600 of this embodiment are all mature technologies in the prior art, and this embodiment will not be repeated. That is to say, for the medical stent implantation device of this embodiment, although the stent implanter driving mechanism of Example 1 is used, the stent implanter driving mechanism will not affect the conventional matching structure between the inner tube 400, the middle tube 200, the outer tube 500 and the stent 600, but only the driving structure and driving mode of the stent implanter driving mechanism of Example 1 are changed to realize the linear reciprocating movement of the outer tube 500 relative to the axial direction of the inner tube 400. Such a design makes the stent implanter driving mechanism independently become a separate module for design and processing, which not only reduces the R&D cost, but also reduces the processing cost, and can avoid the problem of excessive design and processing costs caused by the stent implanter driving mechanism affecting the matching structure between the remaining inner tube 400, the middle tube 200, the outer tube 500 and the stent 600.

[0068] Considering that when the position of the outer tube 500 needs to be fixed, the position of the outer tube 500 will not be affected by the doctor's hand misoperation, the stent implanter drive mechanism of this embodiment also includes a locking mechanism suitable for locking the transmission component so that the synchronous belt 104 cannot drive the outer tube 500 to move.

[0069] Specifically, the locking mechanism of this embodiment includes an annular gear 800 which is arranged inside the operating handle 300 and is coaxially fixedly connected to the driving rotating wheel 103 of the transmission assembly and is suitable for rotating synchronously with the driving rotating wheel 103, and a locking button 900 which is suitable for abutting the annular gear 800 to lock the rotation of the annular gear 800; wherein the annular gear 800 and the rotating hand wheel 106 are respectively located at the two ends of the axial direction of the driving rotating wheel 103, so that the annular gear 800 and the rotating hand wheel 106 can rotate synchronously with the driving rotating wheel 103 without interfering with each other.

[0070] Secondly, at least one tooth groove 801 is evenly distributed along the circumference of one side end surface of the annular toothed disc 800, and the tooth groove 801 is formed by adjacent tooth keys 803; and a button tooth profile 901 suitable for meshing with the tooth groove 801 is provided at the portion of the locking button 900 used to abut the annular toothed disc 800, and when the button tooth profile 901 is matched in the tooth groove 801, the tooth keys 803 on both sides of the tooth groove 801 form a stop for the button tooth profile 901. That is to say, when the button tooth profile 901 meshes with the tooth groove 801, the locking button 900 can limit the rotation of the annular toothed disc 800 to achieve a locking effect on the transmission component; when the button tooth profile 901 is separated from the tooth groove 801, the locking button 900 will not affect the synchronous rotation of the annular toothed disc 800 with the driving gear under the action of the rotating hand wheel 106.

[0071] The locking button 900 of the present embodiment is specifically designed to facilitate the doctor's hand to operate and control. A receiving groove 301 suitable for assembling the locking button 900 is provided inside the operating handle 300; the two side walls of the receiving groove 301 perpendicular to the axial direction of the annular gear 800 are respectively provided with notches 302 suitable for the locking button 900 to partially extend, and the notch 302 on the side of the receiving groove 301 away from the annular gear 800 is formed on the side wall of the operating handle 300. Specifically here, the locking button 900 is embedded in the receiving groove 301 along the axial direction perpendicular to the annular gear disk 800, and the locking button 900 is suitable for moving in the receiving groove 301 and the notches 302 on the two side walls of the receiving groove 301 along the axial direction perpendicular to the annular gear disk 800, and for the locking button 900, one end thereof extends out of the receiving groove 301 through the receiving groove 301 toward a notch 302 of the annular gear disk 800, and a button tooth profile 901 is provided on the portion extending out of the receiving groove 301, so as to facilitate the button tooth profile 901 to engage or disengage with the annular gear disk 800. The other end of the locking button 900 extends out of the receiving groove 301 through another notch 302 of the receiving groove 301 away from the annular gear plate 800. In addition, since the notch 302 on the side of the receiving groove 301 away from the annular gear plate 800 is formed on the side wall of the operating handle 300, the portion of the locking button 900 extending out of the receiving groove 301 through the notch 302 directly extends out of the operating handle 300, so that the doctor's hand can operate the operating button. In detail, the doctor's hand moves along the direction perpendicular to the annular gear plate 800 to When the axial direction of the disk 800 gradually pushes the locking button 900 extending outside the operating handle 300 into the accommodating groove 301, the button tooth profile 901 can gradually engage with the tooth groove 801 of the annular toothed disk 800. That is to say, the engagement and separation of the button tooth profile 901 and the tooth groove 801 of the annular toothed disk 800 are achieved by the doctor's hand releasing or pressing the locking button 900, so that the release of the bracket 600 at any time during the release process of the bracket 600 can achieve an instant stop and start effect as the hand operates the locking button 900.

[0072] Taking into account that the locking button 900 can automatically reset when the force exerted by the doctor's hand on the locking button 900 disappears, the outer wall of the locking button 900 in this embodiment is further provided with an annular flange 902 suitable for abutting against the edge of the notch 302 on the side of the accommodating groove 301 away from the annular toothed disk 800 from the side of the accommodating groove 301; and a spring body 1000 is also sleeved on the outside of the locking button 900; one axial end of the spring body 1000 is suitable for abutting against the edge of the notch 302 on the side of the accommodating groove 301 facing the annular toothed disk 800 from the side of the accommodating groove 301, and the other axial end of the spring body 1000 is suitable for abutting against the annular flange 902 from the side of the accommodating groove 301. In detail, when the doctor's hand does not press the locking button 900, the spring body 1000 is in a compressed state, and at this time, one end of the spring body 1000 is pressed against the edge of the notch 302 of the receiving groove 301 facing the annular gear 800 from one side of the receiving groove 301, and the other axial end of the spring body 1000 is pressed against the annular flange 902 from one side of the receiving groove 301, and the annular flange 902 is pressed against the edge of the notch 302 of the receiving groove 301 away from the annular gear 800 from one side of the receiving groove 301. At this time, the button tooth profile 901 and the tooth groove 801 of the annular gear 800 are in a meshing state, that is, the rotating handwheel 106 is in a non-rotatable state, and at this time, the annular flange 902 is pressed against the edge of the notch 302 of the receiving groove 301 away from the annular gear 800. When the doctor's hand presses the locking button 900 from the outside of the operating handle 300, the spring body 1000 is axially compressed and deformed. At the same time, when the locking button 900 moves toward the annular gear 800, as the spring body 1000 continues to deform, the button tooth profile 901 of the locking button 900 is gradually separated from the tooth groove 801 of the annular gear 800, so that the locking effect of the locking button 900 on the annular gear 800 is unlocked and fails. At this time, as long as the locking button 900 is kept pressed, and the rotating hand wheel 106 is turned forward or reversely at the same time, the rotating hand wheel 106 can drive the rotation of the synchronous belt 104 through the active rotating wheel 103, so that the rotation of the synchronous belt 104 drives the outer tube 500 to reciprocate in a straight line along the axial direction of the inner tube 400.

[0073] In the above process, it should be noted that the main function of the spring body 1000 of the present embodiment is, on the one hand, to reset the locking button 900 through the resetting action of the spring body 1000 after the force applied by the doctor's hand pressing the locking button 900 disappears; on the other hand, the natural compression of the spring body 1000 also limits the doctor's hand from pressing the locking button 900, so that the locking button 900 will not be completely accommodated in the accommodating groove 301 as a whole, affecting the button operation of the hand.

[0074] In another optional implementation, the engagement and disengagement between the locking button 900 and the tooth groove 801 of the annular toothed disk 800 can also be achieved through a connecting rod mechanism.

[0075] In addition, in order to ensure the stability of the outer tube 500 when it moves along the axial direction of the inner tube 400, a guide rail 303 distributed along the axial direction of the inner tube 400 is provided on the inner wall of the operating handle 300; and a guide groove 1012 suitable for matching with the guide rail 303 is provided on the end surface of the outer sleeve 101 of the stent implanter driving mechanism facing the guide rail 303. Such a structure also allows the weight of the outer tube clamping mechanism and the outer tube 500 to be transferred to the operating handle 300 instead of the synchronous belt 104 through the guide groove 1012.

[0076] In an optional implementation, a positioning ring 201 is provided on the side wall of the portion of the middle tube 200 away from the operating handle 300; the positioning ring 201 is suitable for matching with the lasso 602602 provided at the end of the bracket 600 facing the middle tube 200. It should be noted here that the positioning ring 201 is at a certain distance from the end of the middle tube 200 away from the operating handle 300 (hereinafter referred to as the "distal end", it should be noted that the terms "distal end" and "distal end" should indicate a position, direction or orientation that is usually away from the physician. The terms "proximal end" and "proximal end" should indicate a position, direction or orientation that is usually facing the physician). The positioning ring 201 of the bracket 600 of this embodiment can be in the form of an inclined cutout 2011 or a barbed hook structure 2012, and this embodiment does not make an absolute limitation on this. In conjunction with the accompanying drawings, the inclined incision 2011 is taken as an example, and the opening direction of the incision is toward the "proximal end"; after the stent 600 is compressed, it is placed between the outer tube 500 and the inner tube 400, and the proximal end of the stent 600 has a lasso 602. The material of the lasso 602 can be, for example, but not limited to, nylon or stainless steel or polypropylene woven flexible wire. After the stent 600 is compressed, the "proximal end" of the stent 600 is tightly attached to the "distal end" of the middle tube 200, and the lasso is hung in the inclined incision 2011 of the middle tube 200. Since the positioning ring 201 of the stent 600 is at a certain distance from the "distal end" of the middle tube 200, the lasso is pre-tensioned. The lasso 602 is in a tight state, and the outer periphery of the lasso is the outer tube 500, so the lasso 602 will not be separated from the inclined incision 2011. During the release process of the bracket 600, due to the traction of the lasso 602, the position of the bracket 600 relative to the middle tube 200 will not change after the release, thereby realizing the accurate positioning of the bracket 600; secondly, when the bracket 600 is not completely released or is completely released, the middle tube 200 can be driven to retreat by dragging the operating handle 300, and the middle tube 200 drives the bracket 600 to retreat, thereby realizing the adjustment of the position of the bracket 600 during or after the release, thereby ensuring the accuracy of the release positioning of the bracket 600.

[0077] It should be noted that the length of the hand-held tube 700 allows a single doctor to release the bracket 600 and ensures that the bracket 600 is accurately positioned. The total length of the hand-held tube 700 and the operating handle 300 should be maintained at 500 to 1000 mm, so that the doctor can hold the operating handle 300 with his left hand or right hand to perform the release operation; the other hand holds the hand-held tube 700, and the "distal end" of the hand-held tube 700 is as close as possible to the patient's natural cavity (oral cavity, nasal cavity, anus, etc.), so that the position of the other hand is as close as possible to the entrance of the patient's natural cavity. During the release process of the bracket 600, the position of the other hand relative to the patient's natural cavity remains unchanged, ensuring that the position of the bracket 600 in the patient's body cavity remains unchanged.

[0078] The specific operation method of the medical stent implantation device of this embodiment is as follows:

[0079] The implant device containing the stent 600 is delivered to the lesion site at the distal end. The physician's left hand holds the operating handle 300 of the medical stent implant device. Specifically, the index finger or middle finger of the left hand is used to press the locking button 900. After the locking button 900 is pressed, the rotation of the rotating hand wheel 106 is released. The thumb of the left hand is used to operate the rotating hand wheel 106. According to the situation, the rotating hand wheel 106 is rotated clockwise or counterclockwise, thereby realizing the forward and backward movement of the outer tube 500 relative to the operating handle 300, and completing the release and recovery of the stent 600. ; When the left hand's pressing action on the locking button 900 is cancelled, the locking button 900 is not pressed, the rotational movement of the rotating hand wheel 106 is locked, and the thumb cannot operate the rotating hand wheel 106, that is, the release and recovery movement of the bracket 600 is restricted; the ring finger and the little finger are used to hold the operating handle 300; the doctor's right hand holds the hand-held tube 700 of the medical stent implantation device to fix the relative position of the hand-held tube 700 relative to the patient, thereby keeping the position of the bracket 600 in the human body cavity unchanged and ensuring the accuracy of the release of the bracket 600.

[0080] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0081] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stent implanter driving mechanism, suitable for a medical stent implanter, characterized in that: include: An outer tube clamping mechanism, the outer tube clamping mechanism comprising an outer sleeve fixedly sleeved on the outer tube, and a pressing block connected to the outer sleeve; the outer sleeve has a through hole suitable for the outer tube to pass through; the outer sleeve and the pressing block are integrally formed or assembled and fixed by screws; The axial shift driving mechanism comprises a transmission assembly matched with the pressing block to drive the pressing block to move, and a power unit connected to the transmission assembly; that is, the power unit is suitable for driving the transmission assembly to drive the pressing block to move and realize the synchronous movement of the outer tube; the transmission assembly comprises an annular synchronous structure, and a passive rotating wheel and an active rotating wheel matched with the annular synchronous structure; wherein the active rotating wheel is matched with the power unit to be suitable for the power unit to drive the active rotating wheel to rotate; The annular synchronous structure passes through the end faces of the outer sleeve and the pressing block, that is, the annular synchronous structure is pressed by the matching of the outer sleeve and the pressing block so that the annular synchronous structure can drive the pressing block and the outer sleeve to move.

2. The stent implanter driving mechanism according to claim 1, characterized in that: The annular synchronous structure adopts a synchronous belt; The inner side wall of the synchronous belt is provided with tooth-shaped parts which are arranged continuously; and The outer side walls of the passive rotating wheel and the active rotating wheel are provided with toothed structures suitable for meshing and connecting with the toothed parts; and A toothed portion adapted to mesh with the toothed portion is provided on the end surface of the pressing block that is matched with the outer sleeve.

3. The stent implanter driving mechanism according to any one of claims 1 or 2, characterized in that: The power unit adopts a rotating hand wheel which is fixedly connected with the driving rotating wheel.

4. A medical stent implantation device, characterized in that: include: A middle tube, an operating handle fixedly connected to the middle tube, an inner tube arranged inside the middle tube, and an outer tube arranged outside the middle tube; in The operating handle is provided with a stent implanter driving mechanism as claimed in any one of claims 1 to 3; and The inner tube passes through the outer sleeve of the stent implanter drive mechanism; and the stent implanter drive mechanism is suitable for driving the outer tube to move linearly back and forth along the axis of the inner tube; A bracket is arranged between the inner tube and the outer tube.

5. The medical stent implantation device according to claim 4, characterized in that: The stent implanter driving mechanism further comprises a locking mechanism adapted to lock the transmission assembly; The locking mechanism comprises an annular gear plate disposed inside the operating handle and coaxially connected to the driving rotating wheel of the transmission assembly so as to be adapted to rotate synchronously with the driving rotating wheel, and a locking button adapted to abut against the annular gear plate to lock the rotation of the annular gear plate; in At least one tooth groove is evenly distributed along the circumference of one end surface of the annular gear disk, wherein the tooth groove is formed by adjacent tooth keys; and A button tooth profile suitable for meshing and matching with the annular gear disk is provided on the portion of the locking button used for abutting against the annular gear disk.

6. The medical stent implantation device according to claim 5, characterized in that: A receiving groove suitable for assembling the locking button is also provided inside the operating handle; The two side walls of the receiving groove perpendicular to the axial direction of the annular gear plate are respectively provided with notches suitable for the locking button to extend partially; in The notch on the side of the receiving groove away from the annular gear disc is formed on the side wall of the operating handle; The button tooth profile is located at the locking button and extends out of the receiving groove through a notch on the side of the receiving groove facing the annular gear disk.

7. The medical stent implantation device according to claim 6, characterized in that: An annular flange is also provided on the outer side wall of the locking button, which is suitable for abutting against the edge of the notch of the accommodating groove away from the annular gear disc from one side of the accommodating groove; and A spring body is also sleeved on the outer side of the locking button; One axial end of the spring body is suitable for abutting against the edge of the notch of the accommodating groove facing the annular gear plate from one side of the accommodating groove, and the other axial end of the spring body is suitable for abutting against the annular flange from one side of the accommodating groove.

8. The medical stent implantation device according to claim 4, characterized in that: A guide rail is provided on the inner wall of the operating handle and is distributed along the axial direction of the inner tube; and A guide groove suitable for matching with the guide rail is provided on the end surface of the outer sleeve of the stent implanter driving mechanism facing the guide rail.

9. The medical stent implantation device according to claim 4, characterized in that: A positioning ring is provided on the side wall of the portion of the middle tube away from the operating handle; The positioning ring is suitable for being matched with a lasso arranged at the end of the bracket facing the middle tube.

Images