Stent Loader

Abstract

The present invention discloses a stent loader, which belongs to the field of medical technology. It mainly includes a shell, a loader installed on the shell, a movable block slidably installed on the shell, and a loading line. The interior of the loader is provided with a tubular cavity with a gradually decreasing aperture, an axis is installed on the movable block, an axial hole is provided on the shell corresponding to the axis, and a wire hole end face is formed on the outer end face of the shell and located at the axial hole. The shaft can be slidably installed in the axial hole. When the first head of the loading line passes through the stent and is engaged with the shaft sleeve slidably installed in the axial hole, the first head of the loading line abuts against the wire hole end face, and the second head of the loading line is connected to the movable block. When the movable block slides on the shell and the shaft does not separate from the wire hole end face, the movable block moves to pull the second head of the loading line to move, thereby pulling the stent into the tubular cavity of the loader, forcing the stent to shrink radially. The stent loader of the present invention can effectively prevent the stent from being damaged during the radial contraction process.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to a stent loader. Background Art

[0002] The stent loader is used to radially compress the stent and load it into the inserter, such as Figure 1 As shown, after the stent is loaded into the implanter after shrinking, the implanter then delivers the stent into the human body. In the existing stent implanter, the stent is forced into the tube cavity with a gradually shrinking diameter by pushing the stent against the stent along the axial direction of the stent, so that when the stent contacts the inner wall of the tube cavity, a radial squeezing force is generated on the stent to shrink the stent. In the process of the stent being pushed against and shrunk, the stent is subjected to not only radial squeezing force but also axial squeezing force, so that the stent is pushed and deformed along the axial direction. Since the axial pushing and deformation is perpendicular to the radial contraction of the stent and forms a mutual obstruction, the stent is easily damaged to a certain extent, thereby affecting the use effect of the stent.

[0003] Therefore, it is necessary to provide a new stent loader. Summary of the invention

[0004] Based on the above problems existing in the prior art, an object of an embodiment of the present invention is to provide a stent loader, which can effectively prevent the stent from being damaged during the radial contraction process, thereby affecting the use effect of the stent.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a stent loader, comprising a shell, a loader installed on the shell, a movable block slidably installed on the shell and a loading line, the interior of the loader is provided with a tubular cavity with a gradually decreasing aperture, an axis is installed on the movable block, an axial hole is provided on the shell corresponding to the axis, a wire hole end face is formed on the outer end face of the shell and located at the axial hole, the shaft can be slidably installed in the axial hole, the first head of the loading line is abutted against the wire hole end face when passing through the stent and engaging with the shaft sleeve slidably installed in the axial hole, the second head of the loading line is connected to the movable block, when the movable block slides on the shell and the shaft does not separate from the wire hole end face, the movable block moves to pull the second head of the loading line to move, thereby pulling the stent into the tubular cavity of the loader, forcing the stent to shrink radially.

[0006] Furthermore, the tubular cavity inside the loader includes a loading cavity, a transition cavity and a propulsion cavity arranged in sequence along a straight line, the maximum aperture of the transition cavity is smaller than the minimum aperture of the loading cavity, and the maximum aperture of the propulsion cavity is smaller than the minimum aperture of the transition cavity.

[0007] Furthermore, the connection between the loading chamber and the transition chamber, and the connection between the transition chamber and the propulsion chamber are both trumpet-shaped structures.

[0008] Furthermore, a movable block wire hole and a wire fixing block are provided on the movable block corresponding to the second end of the loading wire, so that the second end of the loading wire can pass through the movable block wire hole and be fixedly connected to the wire fixing block.

[0009] Furthermore, the stent loader also includes a push rod, which is used to completely push the stent in the loader into the inserter.

[0010] Furthermore, the stent loader also includes a spring device, which is installed on the shell and located at one end of the loader close to the inserter. The spring device is used to lock the inserter so that the inserter cannot move away from the loader when the inserter is docked with the loader.

[0011] Furthermore, the shrapnel device is an annular structure, and a plurality of shrapnel are arranged around the inner side wall of the shrapnel device, the ends of the shrapnel tend to be inclined toward the loader, and the diameter of the circle formed by the ends of the plurality of shrapnel is smaller than the outer diameter of the inserter.

[0012] Furthermore, the stent loader also includes a propulsion device and a push block, the push block is slidably connected to the spring device, the propulsion device is used to push the push block to slide on the spring device, and the push block slides to push the spring in the spring device away from the inserter to release the lock of the spring device on the inserter.

[0013] Furthermore, a connecting protrusion is provided on the spring sheet device at the end thereof away from the loader, an annular groove is provided on the peripheral side wall of the push block, the connecting protrusion is slidably sleeved in the annular groove of the push block, a push surface is provided on the end of the push block close to the spring sheet on the spring sheet device, and the propulsion device is slidably fitted on the outer shell and is located at one end of the spring sheet device close to the push block.

[0014] Furthermore, a magnetic attraction component is installed on the outer shell at a position close to the movable block, and a magnetic attraction component is also installed on the movable block at a position close to the outer shell.

[0015] The beneficial effects of the present invention are as follows: the stent loader provided by the present invention comprises a shell, a loader mounted on the shell, a movable block slidably mounted on the shell, and a loading line, the interior of the loader is provided with a tubular cavity with a gradually decreasing aperture, an axis is mounted on the movable block, an axis hole is provided on the shell corresponding to the axis, a line hole end face is formed on the shell and on the outer end face of the axis hole, the axis can be slidably mounted in the axis hole, the first end of the loading line is abutted against the line hole end face when passing through the stent and being engaged with the shaft sleeve slidably mounted in the axis hole, and the second end of the loading line is connected to the stent. On the movable block, when the movable block slides on the outer shell and the shaft has not separated from the end face of the wire hole, the movable block moves to pull the second head of the loading line to move, thereby pulling the stent into the lumen of the loader, forcing the stent to shrink radially. Since the stent loader provided by the embodiment of the present invention uses the movable block to pull the stent into the lumen with a gradually shrinking aperture through the loading line when moving, thereby causing the stent to shrink radially, during the radial shrinkage of the stent, the stent is not pushed in the axial direction, and the stent will not be pushed and deformed in the axial direction, which can effectively prevent the stent from being damaged when it is contracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] In the figure: Figure 1 Schematic diagram of the assembly relationship between the stent and the inserter.

[0018] Figure 2 This is a schematic structural diagram of the bracket loader provided in the first embodiment of the present invention when the second shell is omitted.

[0019] Figure 3 This is a schematic structural diagram of the bracket loader provided in the first embodiment of the present invention when the first shell is omitted.

[0020] Figure 4 This is a three-dimensional schematic diagram of a first shell in a shell provided in Embodiment 1 of the present invention.

[0021] Figure 5 for Figure 4 Another perspective view of .

[0022] Figure 6 This is a three-dimensional schematic diagram of a second shell in the housing provided in Embodiment 1 of the present invention.

[0023] Figure 7 A cross-sectional view of a loader provided in Embodiment 1 of the present invention.

[0024] Figure 8 This is a three-dimensional schematic diagram of a loader provided in Embodiment 1 of the present invention.

[0025] Fig. 9 This is a three-dimensional schematic diagram of a movable block provided in Embodiment 1 of the present invention.

[0026] Fig.10 for Fig. 9 Another perspective view of .

[0027] Fig.11 This is a three-dimensional schematic diagram of a push rod provided in Embodiment 1 of the present invention.

[0028] Fig.12 A three-dimensional schematic diagram of a spring provided in Embodiment 1 of the present invention.

[0029] Fig.13 A cross-sectional view of a spring provided in Embodiment 1 of the present invention.

[0030] Fig.14 This is a three-dimensional schematic diagram of a propulsion device provided in Example 1 of the present invention.

[0031] Fig.15 This is a three-dimensional schematic diagram of a push block provided in Embodiment 1 of the present invention.

[0032] Fig.16 This is a schematic diagram of the stent loader provided in the first embodiment of the present invention in a usage state.

[0033] Fig.17 This is a schematic diagram of the stent loader provided in Embodiment 1 of the present invention in yet another usage state.

[0034] Fig.18 This is a schematic diagram of the stent loader provided in Embodiment 1 of the present invention in yet another usage state.

[0035] Fig.19 This is a schematic structural diagram of the bracket loader provided in the second embodiment of the present invention when the second shell is omitted.

[0036] Fig. 20 This is a schematic structural diagram of the bracket loader provided in the second embodiment of the present invention when the first shell is omitted.

[0037] Fig.21 This is a three-dimensional schematic diagram of a second shell in a housing provided in Embodiment 2 of the present invention.

[0038] Fig. 22 This is a three-dimensional schematic diagram of a movable block provided in Embodiment 2 of the present invention.

[0039] Wherein, the reference numerals in the figures are: 100, stent; 200, inserter.

[0040] 1. Shell; 101. Shell slide groove; 102. First magnetic suction groove; 103. Push rod magazine; 104. Anti-skid structure; 105. Slide rail; 11. First shell; 111. Buckle; 12. Second shell; 121. Buckle groove; 13. Loader groove; 14. Push hole; 141. Slot; 15. Push rod hole; 16. First threading hole; 17. Second threading hole; 18. Axis hole; 19. Wire hole end face.

[0041] 2. Loader; 21. Loading chamber; 22. Transition chamber; 23. Propulsion chamber; 24. Inserter chamber; 25. Loading slot.

[0042] 3. Movable block; 31. Mounting hole; 32. Movable block wire hole; 33. Wire fixing block; 34. Movable block slide rail; 35. Second magnetic suction groove; 36. Anti-slip structure; 4. Loading line; 5. Push rod; 51. Handle; 52. Push rod slide groove; 6. Shrapnel device; 61. Shrapnel; 62. Connecting cam; 7. Propelling device; 71. Propelling shaft; 72. Propelling handle; 8. Push block; 81. Ring groove; 82. Push surface; 9. Shaft; 10. Magnetic part. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] It should be noted that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0048] Embodiment 1

[0049] Please refer to Figures 2 to 19 As shown, a stent loader provided by an embodiment of the present invention is now described. The stent loader comprises a housing 1, a loader 2 mounted on the housing 1, a movable block 3 slidably disposed on the housing 1, and a loading line 4. Figure 7 As shown, the interior of the loader 2 is provided with a tubular cavity with a gradually decreasing aperture, and a shaft 9 is installed on the movable block 3. Figure 5As shown, the housing 1 is provided with an axial hole 18 corresponding to the shaft 9, and a wire hole end face 19 is formed on the housing 1 and located on the outer end face of the axial hole 18. The shaft 9 can be slidably installed in the axial hole 18. When the first end of the loading wire 4 passes through the bracket 100 and is sleeved with the shaft 9 slidably installed in the axial hole 18, the first end of the loading wire 4 abuts against the wire hole end face 19, and the second end of the loading wire 4 is connected to the movable block 3; when the shaft 9 on the movable block 3 is inserted into the axial hole 18, and the first end of the loading wire 4 passes through the bracket 100 and is sleeved with the shaft 9, at this time, due to the loading wire 4 The first head of the wire 4 is blocked and limited by the wire hole end face 19 along the axial direction of the shaft 9, and the first head of the loading wire 4 is fixed relative to the housing 1; when the movable block 3 slides on the housing 1 and the shaft 9 does not separate from the wire hole end face 19, the movable block 3 moves to pull the second head of the loading wire 4 to move, thereby pulling the stent 100 into the lumen of the loader 2, forcing the stent 100 to shrink radially; when the movable block 3 is moved until the shaft 9 separates from the wire hole end face 19, the first head of the loading wire 4 is disengaged from the shaft 9, so that the loading wire 4 can be pulled away from the stent 100 by continuing to move the movable block 3. Thus, through the above technical solution, since the stent loader provided by the embodiment of the present invention uses the movable block to pull the stent 100 into the lumen with a gradually shrinking aperture through the loading wire 4 when moving, so that the stent 100 shrinks radially, during the process of radial shrinkage of the stent 100, the stent 100 is not pushed in the axial direction, and the stent 100 will not be pushed and deformed in the axial direction, which can effectively prevent the stent 100 from being damaged when it is shrunk.

[0050] In some of the embodiments, the inserter 200 may be a stent inserter disclosed in Patent No.: CN202111045105.5. The stent loader provided in the embodiment of the present invention is used to radially shrink the stent 100 and push it into the outer tube of the stent inserter.

[0051] In some embodiments, the housing 1 is a spliced ​​structure, and the housing 1 includes a first housing 11 and a second housing 12. Figure 4 and Figure 6 As shown, a buckle 111 is provided on the first shell 11 corresponding to the second shell 12, and a buckle groove 121 is provided on the second shell 12 to buckle with the buckle 111 on the first shell 11, so that the first shell 11 and the second shell 12 can be detachably connected to facilitate the assembly of the shell 1 and other parts. In addition, when in use, the first shell 11 and the second shell 12 can be disassembled to facilitate observation of the situation inside the shell 1. In some other embodiments not shown in the figures, the first shell 11 and the second shell 12 can also be connected by a threaded connection structure, a magnetic connection structure, etc. to achieve the detachable function of the shell 1.

[0052] like Figure 4As shown, in some embodiments, an anti-skid structure 104 is provided on the outer wall of the housing 1 to increase the friction resistance generated when contacting the housing 1, so as to prevent slipping when sliding the movable block 3. More specifically, the anti-skid structure 104 is located on the first housing 11.

[0053] like Figure 7 As shown, in some embodiments, the lumen inside the loader 2 includes a loading chamber 21, a transition chamber 22, and a propulsion chamber 23 arranged in sequence along a straight line. The loading chamber 21 is used to place the stent 100 in a dilated state. The maximum aperture of the transition chamber 22 is smaller than the minimum aperture of the loading chamber 21, and the maximum aperture of the propulsion chamber 23 is smaller than the minimum aperture of the transition chamber 22. In this way, when the stent 100 passes through the loading chamber 21, the transition chamber 22, and the propulsion chamber 23 in sequence, it can be limited to an outer diameter equal to the aperture of the propulsion chamber 23, thereby playing a role in radial contraction of the stent 100. More specifically, the connection between the loading chamber 21 and the transition chamber 22, and the connection between the transition chamber 22 and the propulsion chamber 23 are both trumpet-shaped structures, so that the stent 100 can smoothly enter the transition chamber 22 from the loading chamber 21, complete a radial contraction, enter the propulsion chamber 23 from the transition chamber 22, and further complete the radial contraction, and contract in steps to avoid the stent 100 being squeezed and contracted at one time, which is not ideal. It is understandable that in some other embodiments, the transition chamber 22 between the loading chamber 21 and the propulsion chamber 23 may be omitted.

[0054] In some embodiments, an inserter cavity 24 is provided at one end of the loader 2 near the propulsion cavity 23, and the inserter cavity 24 is used for inserting the inserter 200 therein, so that the inner cavity of the outer tube of the inserter 200 can be more closely connected with the tube cavity of the loader 2. More specifically, the minimum aperture of the inserter cavity 24 is larger than the aperture of the propulsion cavity 23, so that the inserter cavity 24 has more radial space to accommodate the inserter 200, so that the inner cavity wall of the inserter 200 can be smoothly connected with the hole wall of the propulsion cavity 23, and the stent 100 can smoothly enter the inserter 200 from the propulsion cavity 23.

[0055] refer to Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the housing 1 is provided with a loader slot 13 suitable for accommodating the loader 2 to prevent the loader 2 from shaking freely on the housing 1. Figure 8 As shown, more specifically, a loading groove 25 is provided on the outer wall of the loader 2, and the loading groove 25 is suitable for engaging with the loader groove 13 on the shell 1, so that the loader 2 is firmly accommodated in the shell 1 and the loader 2 is prevented from axial movement and circumferential rotation relative to the shell 1.

[0056] like Fig. 9As shown, in some embodiments, a mounting hole 31 is provided on the movable block 3 corresponding to the shaft 9, and the shaft 9 is inserted and fixed in the mounting hole 31, so that the shaft 9 is fixedly connected to the movable block 3. In addition, the length direction of the shaft 9 is parallel to the sliding direction of the movable block 3 on the housing 1, so that when the movable block 3 slides linearly back and forth on the housing 1, the shaft 9 can slide in the shaft hole 18 on the housing 1 at the same time, and the first head of the loading line 4 sleeved on the shaft 9 moves on the shaft 9.

[0057] like Fig. 9 As shown, in some of the embodiments, a movable block wire hole 32 and a wire fixing block 33 are provided on the movable block 3 corresponding to the second end of the loading wire 4, so that the second end of the loading wire 4 can pass through the movable block wire hole 32 and be fixedly connected to the wire fixing block 33, so that the second end of the loading wire 4 is fixedly connected to the movable block 3, so as to pull the second end of the loading wire 4 when the movable block 3 slides on the housing 1.

[0058] like Figure 5 and Fig. 9 As shown, in some embodiments, the housing 1 is provided with a housing slide groove 101 for cooperating with the movable block 3 to slide on the housing 1, and the movable block 3 is provided with a movable block slide rail 34 that can be slidably connected with the housing slide groove 101, so that when the movable block 3 can be slidably installed in the housing slide groove 101 on the housing 1 through the movable block slide rail 34, the movable block 3 can make a linear reciprocating motion on the housing 1. More specifically, the housing slide groove 101 is provided on the first housing 11, and the movable block 3 and the second housing 12 are located on the side opposite to the first housing 11.

[0059] like Fig.10 As shown, in some of the embodiments, an anti-skid structure 36 is provided on the outer wall of the movable block 3 to increase the friction resistance generated when contacting the movable block 3, so as to play an anti-skid role when sliding the movable block 3.

[0060] like Figure 5 As shown, in some of the embodiments, a first threading hole 16 and a second threading hole 17 are provided on the housing 1 corresponding to the two ends of the loading line 4, and the first threading hole 16 is close to the shaft hole 18. The first end of the loading line 4 passes through the bracket 100 and then passes through the first threading hole 16 and extends to the outside of the wire hole end surface 19, and is sleeved on the shaft 9; the second end of the loading line 4 passes through the second threading hole 17 and then passes through the movable block wire hole 32 on the movable block, and is fixedly connected to the wire fixing block 33.

[0061] In some embodiments, after the loading line 4 is overlapped, one end of the loading line 4 presents an O-shaped knot, so that the knot on the loading line 4 can be slidably sleeved on the shaft 9. It is understandable that in other embodiments, one end of the loading line 4 can also be formed into an O-shaped knot by knotting, bonding, or thermoplasticization.

[0062] In some embodiments, the stent loader further comprises a push rod 5, Fig.18 As shown, the push rod 5 is used to completely push the stent 100 in the loader 2 into the inserter 200. Specifically, as Figure 5 As shown, a push rod hole 15 is provided on the housing 1 and near the loading cavity 21 in the loader 2, so that the push rod 5 can be pushed into the lumen of the loader 2 through the push rod hole 15 on the housing 1, and the push rod 5 can be pushed from one end of the loader 2 to the inserter 200 located at the other end of the loader 2, so that after the stent 100 is pulled by the loading line 4 to complete the radial contraction of the stent in the loader 2, the push rod 5 pushes the contracted stent 100 away from the loader 2 and into the inserter 200. In addition, in order to facilitate the detachable connection between the push rod 5 and the housing 1 and facilitate the use of the push rod 5, as shown in FIG. Figure 2 , Figure 4 and Figure 5 As shown, a push rod bin 103 suitable for inserting the push rod 5 is provided on the housing 1 corresponding to the push rod 5. When the push rod 5 is inserted into the push rod bin 103, the push rod 5 can be stored on the housing 1 and hidden inside the housing 1 to avoid contamination of the push rod 5 when not in use.

[0063] refer to Fig.11 As shown, in some embodiments, a handle 51 for holding is provided at one end of the push rod 5, so as to prevent the push rod 5 from being contaminated when the push rod 5 is taken out, and a push rod slide groove 52 extending along the axial direction of the push rod 5 is provided on the handle 51, Figure 5 A slide rail 105 is provided on the outer shell 1 near the push rod bin 103. When the push rod 5 is received in the push rod bin 103, the push rod slide groove 52 on the handle 51 can be slidably fitted on the slide rail 105. On the one hand, it can improve the connection firmness between the push rod 5 and the outer shell 1. On the other hand, when the push rod 5 is taken out from the outer shell 1, it can guide the push rod 5 to slide out of the push rod bin 103.

[0064] In some embodiments, the stent loader further includes a spring device 6, which is mounted on the housing 1 and located at one end of the loader 2 close to the inserter 200. The spring device 6 is used to lock the inserter 200 when the inserter 200 is docked with the loader 2 so that the inserter 200 cannot move away from the loader 2, thereby preventing the inserter 200 from moving away from the loader 2 and causing positional deviation when the stent 100 is pushed into the inserter 200 by the push rod 5, so that the stent 100 is not delivered to the specified position in the inserter 200. Fig.12As shown, the spring piece device 6 is an annular structure, and a plurality of spring pieces 61 are arranged around the inner side wall of the spring piece device 6. The ends of the spring pieces 61 tend to be inclined toward the loader 2, and the diameter of the ring formed by the ends of the spring pieces 61 is smaller than the outer diameter of the inserter 200. Therefore, when the inserter 200 passes through the middle of the plurality of spring pieces 61 and abuts against the loader 2, if the inserter 200 retracts away from the loader 2, the spring piece 61 will also have a tendency to swing away from the loader 2 due to the ends of the spring pieces 61 abutting against the outer wall of the inserter 200. This tendency will cause the diameter of the ring formed by the ends of the plurality of spring pieces 61 to further decrease, so that the spring pieces 61 will apply resistance to the inserter 200 in the direction of approaching the loader 2, so as to prevent the inserter 200 from sliding away from the loader 2, thereby avoiding axial deviation of the inserter 200.

[0065] In some embodiments, the stent loader further includes a propulsion device 7 and a push block 8, wherein the push block 8 is slidably connected to the spring device 6, and the propulsion device 7 is used to push the push block 8 to slide on the spring device 6, and the push block 8 slides to push the spring 61 in the spring device 6 away from the inserter 200, so as to release the lock of the spring device 6 on the inserter 200.

[0066] In some embodiments, a connecting protrusion 62 is provided on the spring device 6 at the end of the spring 61 away from the loader 2, an annular groove 81 is provided on the peripheral side wall of the push block 8, and the connecting protrusion 62 is slidably sleeved in the annular groove 81 of the push block 8. A push surface 82 is provided on the end of the push block 8 close to the spring 61 on the spring device 6, and the propulsion device 7 is slidably fitted on the housing 1 and is located at the end of the spring device 6 close to the push block 8, so that when the propulsion device 7 is slid toward the spring device 6, the push block 8 can be pushed to slide on the spring device 6 until the push surface 82 on the push block 8 abuts against the spring 61, causing the spring 61 to swing in a direction away from the axis of the spring device 6, until the diameter of the ring formed by the ends of the multiple springs 61 is expanded until the spring 61 is separated from the inserter 200. At this time, the axial locking of the inserter 200 by the spring device 6 can be released, and the inserter 200 can be easily pulled out from the stent loader. Fig.15 As shown, specifically, the push surface 82 is an inclined surface structure inclined relative to the axis of the push block 8 .

[0067] It can be understood that, in some other embodiments, the stent loader further includes a propulsion device 7 and a push block 8, the push block 8 is connected to one end of the propulsion device 7 close to the spring device 6, and the propulsion device 7 is used to drive the push block 8 to move close to the spring device 6, so as to push the spring sheet 61 in the spring device 6 away from the inserter 200 through the push block 8, so as to release the lock of the spring device 6 on the inserter 200.

[0068] like Figure 5 and Fig.14As shown, in some embodiments, a propulsion hole 14 is provided on the shell 1 and located at one end of the loader 2 close to the shrapnel device 6, a slot 141 is provided on the shell 1 and located on the side wall of the propulsion hole 14, the propulsion device 7 includes a hollow propulsion shaft 71 and a propulsion handle 72 provided on the outer wall of the propulsion shaft 71, the propulsion shaft 71 is slidably installed in the propulsion hole 14, and the propulsion handle 72 passes through the slot 141 on the outside of the slot 141, so that the propulsion shaft 71 can be easily slid by contacting the propulsion handle 72, so that the propulsion shaft 71 is close to or away from the shrapnel device 6, so as to complete the unlocking of the inserter 200 by the shrapnel device 6.

[0069] like Figure 3 As shown, in some of the embodiments, a magnetic component 10 is installed on the outer shell 1 and close to the movable block 3, and a magnetic component 10 is also installed on the movable block 3 and close to the outer shell 1, so that when the movable block 3 is retracted on the outer shell 1, the movable block 3 is firmly connected to the outer shell 1 through the attraction between the magnetic components 10.

[0070] like Figure 6 As shown, in some embodiments, a first magnetic attraction groove 102 is provided on the second shell 12 of the housing 1 and close to the side of the movable block 3. Fig. 9 A second magnetic attraction groove 35 is provided on one side of the movable block 3 close to the housing 1 , and a magnetic attraction member 10 is installed in each of the first magnetic attraction groove 102 and the second magnetic attraction groove 35 .

[0071] When the stent loader of the present invention is used:

[0072] First, remove the loader 2 and load the bracket 100 in a free and stretched state into the loading cavity 21 of the loader 2. At the same time, pass the loading line 4 through the second threading hole 17 on the outer shell 1 in sequence, pass through the bracket 100, and then pass out from the first threading hole 16. The first end of the loading line 4 passes through the first threading hole 16 and is sleeved on the fixed shaft 9. The second end of the loading line 4 passes through the movable block line hole 32 on the movable block 3 and is fixed on the line fixing block 33. After completion, load the loader 2 onto the outer shell 1.

[0073] Subsequently, the movable block 3 is moved in the direction away from the loader 2. When the fixed shaft 9 has not left the wire hole end face 19, moving the movable block 3 will drive the loading wire 4 fixed on the wire fixing block 33 to move. Since one end of the loading wire 4 is fixed by the fixed shaft 9 and the wire hole end face 19, when the movable block 3 drives the loading wire 4 to move, the loading wire 4 will naturally bring the bracket 100 into the transition cavity 22 and gradually enter the propulsion cavity 23; when the fixed shaft 9 is separated from the wire hole end face 19, the loading wire 4 loses the restraint of the wire hole end face 19 and separates from the fixed shaft 9. At this time, continuing to move the movable block 3 will bring the loading wire 4 away from the bracket 100, thereby leaving the bracket loader.

[0074] Next, the inserter 200 is passed through the propulsion shaft 71, the push block 8, and the spring device 6 in sequence until it enters the inserter cavity 24. At this time, under the action of the spring device 6 and the loader 2, the inserter 200 cannot move at will; then, under the action of the push rod 5, the stent 100 is gradually pushed into the inserter 200.

[0075] Finally, the propulsion device 7 is moved toward the direction of the loader 2, so that the propulsion shaft 71 contacts the push block 8, driving the push surface 82 to push the spring sheet 61, so that the spring sheet 61 opens, and then the inserter 200 is moved, and the inserter 200 loaded with the stent 100 can be removed smoothly.

[0076] Embodiment 2

[0077] like Fig. 20 , Fig.21 and Fig. 22 As shown, the bracket loader provided in this embodiment is substantially the same as the bracket loader provided in the first embodiment, and the only difference is that the positions of the magnetic attraction members 10 on the housing 1 and the movable block 3 are different.

[0078] In some of the embodiments, a first magnetic groove 102 is provided on the second shell 12 in the outer shell 1 and close to the end of the movable block 3, and a second magnetic groove 35 is provided on an end surface of the movable block 3 close to the outer shell 1, and a magnetic component 10 is respectively installed in the first magnetic groove 102 and the second magnetic groove 35.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stent loader, characterized in that: The invention comprises a shell, a loader mounted on the shell, a movable block slidably mounted on the shell, and a loading line, wherein a tube cavity with a gradually decreasing aperture is arranged inside the loader, an axis is mounted on the movable block, an axial hole is arranged on the shell corresponding to the axis, a wire hole end face is formed on the outer end face of the shell and located at the axial hole, and the axis can be slidably mounted in the axial hole, and when the first head of the loading line passes through the bracket and is engaged with the shaft sleeve slidably mounted in the axial hole, the first head of the loading line abuts against the wire hole end face, and the second head of the loading line is connected to the movable block, and when the movable block slides on the shell and the shaft does not separate from the wire hole end face, the movable block moves to pull the second head of the loading line to move, thereby pulling the bracket into the tube cavity of the loader, forcing the bracket to shrink radially, and the A movable block wire hole and a wire fixing block are provided on the movable block corresponding to the second end of the loading wire, so that the second end of the loading wire can pass through the movable block wire hole and be fixedly connected to the wire fixing block. The bracket loader also includes a push rod, which is used to completely push the bracket in the loader into the inserter. The bracket loader also includes a spring device, which is installed on the shell and located at one end of the loader close to the inserter. The spring device is used to lock the inserter when the inserter is docked with the loader so that the inserter cannot move away from the loader. The spring device is an annular structure, and a plurality of springs are arranged around the inner side wall of the spring device. The ends of the springs tend to tilt towards the loader, and the diameter of the circle formed by the ends of the plurality of springs is smaller than the outer diameter of the inserter.

2. The stent loader according to claim 1, characterized in that: The tubular cavity inside the loader includes a loading cavity, a transition cavity and a propulsion cavity arranged in sequence along a straight line, the maximum aperture of the transition cavity is smaller than the minimum aperture of the loading cavity, and the maximum aperture of the propulsion cavity is smaller than the minimum aperture of the transition cavity.

3. The stent loader according to claim 2, characterized in that: The connection between the loading chamber and the transition chamber, and the connection between the transition chamber and the propulsion chamber are both trumpet-shaped structures.

4. The stent loader according to claim 1, characterized in that: The stent loader also includes a propulsion device and a push block, wherein the push block is slidably connected to the spring device, and the propulsion device is used to push the push block to slide on the spring device. The push block slides to push the spring in the spring device away from the inserter to release the lock of the spring device on the inserter.

5. The stent loader according to claim 4, characterized in that: A connecting protrusion is provided on the spring sheet device at the end of the spring sheet away from the loader, a ring groove is provided on the peripheral side wall of the push block, the connecting protrusion is slidably sleeved in the ring groove of the push block, a push surface is provided on the end of the push block close to the spring sheet on the spring sheet device, and the propulsion device is slidably fitted on the outer shell and is located at one end of the spring sheet device close to the push block.

6. The stent loader according to claim 1, characterized in that: A magnetic attraction component is installed on the shell and close to the movable block, and a magnetic attraction component is also installed on the movable block and close to the shell.

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