Stent segment delivery device and system

Abstract

The embodiment of the present application provides a stent segment conveying device and system, and relates to the field of medical instruments.The stent segment conveying device comprises a shell, a first sleeve, an operating member and a matching member, the open end of the first sleeve is used for covering a stent, the first sleeve is slidably connected to the shell so as to change the relative position of the open end and the stent.The operating member is movably connected to the shell.The matching member is provided with a first matching part and a second matching part, the first matching part is matched with the first sleeve, the second matching part is matched with the operating member, and the operating member is used for driving the first sleeve to slide relative to the shell through the matching member when the operating member moves relative to the shell.The number of the first matching part is multiple, and the first matching part is selectively matched with the first sleeve, and / or the number of the second matching part is multiple, and the second matching part is selectively matched with the operating member, so as to change the limit distance value of the sliding of the first sleeve relative to the shell.The stent segment conveying device can release the same stent in segments.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular, a stent segmented delivery device and system. BACKGROUND

[0002] With the development of interventional therapy technology, the clinical more and more attaches great importance to the minimally invasive way of placing stent in the body to treat various endogenous and exogenous caused stenosis disease. The clinical stent delivery device, that is, a device for placing a stent in a patient's body to achieve the effect of treating diseases.

[0003] The inventor found that the existing stent delivery device cannot release the same stent in segments during use. SUMMARY

[0004] The purpose of the present application is to provide a stent segmented delivery device which can release the same stent in segments.

[0005] The purpose of the present application is also to provide a stent segmented delivery system, which includes the above-mentioned stent segmented delivery device and has all the functions of the stent segmented delivery device.

[0006] The embodiments of the present application are implemented as follows:

[0007] The present embodiment provides a stent segmented delivery device, comprising:

[0008] a housing;

[0009] a first sleeve, the open end of the first sleeve is used to cover the stent, and the first sleeve is slidably connected to the housing to change the relative position of the open end and the stent;

[0010] an operating member movably connected to the housing;

[0011] a cooperating member provided with a first cooperating part and a second cooperating part, the first cooperating part cooperates with the first sleeve, and the second cooperating part cooperates with the operating member, and the operating member is used to drive the first sleeve to slide relative to the housing when the operating member moves relative to the housing;

[0012] wherein the number of the first cooperating part is multiple, and it is selectively cooperated with the first sleeve to change the limit distance value of the first sleeve sliding relative to the housing;

[0013] and / or, the number of the second cooperating part is multiple, and it is selectively cooperated with the operating member to change the limit distance value of the first sleeve sliding relative to the housing.

[0014] In this way, the relative position between the open end and the support changes during the sliding of the first sleeve relative to the shell, and the support can be gradually released from the first sleeve. When the first sleeve is matched with different first matching parts, the limit distance value of the sliding of the first sleeve relative to the shell can be changed, so that the length of the support released from the first sleeve can be changed, so that the same support can be released in sections by the support sectional conveying device. Similarly, when the operating member is matched with different second matching parts, the same support can also be released in sections by the support sectional conveying device.

[0015] Optionally, the operating member is rotationally connected with the shell, the first matching part and the second matching part are both slot structures, the first sleeve is provided with a first clamping part, the operating member is provided with a second clamping part, and the first clamping part and the second clamping part are rotationally matched with the first matching part and the second matching part respectively.

[0016] Optionally, the first matching part and the second matching part are respectively arranged at two ends of the matching member, and the first matching part and the second matching part are both arranged on the same side inner wall of the matching member.

[0017] Optionally, the operating member includes a handle and a telescopic rod, the handle is rotationally connected with the shell, one end of the telescopic rod is rotationally connected with the shell, the other end of the telescopic rod is rotationally connected with the handle, the second matching part is rotationally matched with the telescopic rod, and the first matching part is rotationally matched with the first sleeve.

[0018] The handle is used to make the telescopic rod lengthen or shorten during the rotation of the handle relative to the shell, so as to drive the first sleeve to slide relative to the shell through the matching member.

[0019] Optionally, the telescopic rod includes a first rod and a second rod, the second rod is a cylindrical structure with an opening at one end, the end of the second rod away from the opening is rotationally connected with the shell, one end of the first rod is used to pass through the opening and is slidably sleeved in the second rod along the length direction of the second rod, and the other end of the first rod is rotationally connected with the handle.

[0020] Optionally, a first stop part is arranged on the first rod, and a second stop part is arranged on the second rod, the second stop part is used to abut against the first stop part after the first rod slides relative to the second rod in a preset direction by a preset distance, so as to stop the first rod in the preset direction.

[0021] Optionally, the telescopic rod further comprises a guide block, the second rod is provided with a guide groove extending along the length direction of the second rod, the guide block is connected with one end of the first rod, part of the guide block is located inside the second rod, and the other part of the guide block extends out of the second rod from the guide groove, the first stop portion is connected with the guide block, and the first stop portion and the second stop portion are both located outside the second rod.

[0022] The first rod is used to drive the guide block to move along the guide groove during the sliding of the first rod relative to the second rod, so that the first stop portion is close to or away from the second stop portion.

[0023] Optionally, the telescopic rod further comprises a pressing piece, the first stop portion is a spring sheet, and the pressing piece is movably connected with the guide block to switch between a first state, a second state and a third state.

[0024] In the first state, the first stop portion and the second rod have a gap capable of accommodating the second stop portion, the second stop portion passes through the gap during the sliding of the first rod relative to the second rod, and the first stop portion does not abut against the second stop portion.

[0025] In the second state, the pressing piece presses the first stop portion, the gap is reduced, the second stop portion cannot pass through the gap during the sliding of the first rod relative to the second rod, and the first stop portion is used to abut against the second stop portion.

[0026] In the third state, the pressing piece presses the first stop portion and makes the first stop portion abut against the second rod, and the first rod and the second rod are relatively fixed.

[0027] Optionally, the pressing piece is a cam disc, the pressing piece is rotatably connected with the guide block about an axis of rotation, the pressing piece is sequentially provided with a first pressing portion, a second pressing portion and a third pressing portion in the circumferential direction of the pressing piece, the distance from the second pressing portion to the axis of rotation, the distance from the first pressing portion to the axis of rotation and the distance from the third pressing portion to the axis of rotation sequentially increase.

[0028] In the first state, the first stop portion abuts against the second pressing portion;

[0029] In the second state, the first stop portion abuts against the first pressing portion;

[0030] In the third state, the first stop portion abuts against the third pressing portion.

[0031] Optionally, the telescopic rod further comprises a containing shell and an operating rod, the containing shell is connected with the guide block, the containing shell is a ring structure sleeved on the second rod, the pressing piece and the first stop are located in the containing shell, the first stop is connected with the inner wall of the containing shell, the pressing piece is movably connected with the containing shell, one end of the operating rod is connected with the pressing piece, and the other end of the operating rod extends out of the containing shell.

[0032] Optionally, the second rod comprises a first rod segment and a second rod segment connected with the first rod segment, the second stop is a step structure formed by the transition of the first rod segment and the second rod segment, and the outer wall of the second rod segment protrudes from the outer wall of the first rod segment, and the second rod segment is closer to the opening of the second rod relative to the first rod segment.

[0033] Optionally, the stent segmented conveying device further comprises a boosting tube and a sliding sleeve, the boosting tube is fixedly arranged inside the shell, and the first sleeve is slidably sleeved outside the boosting tube;

[0034] The sliding sleeve is slidably sleeved outside the boosting tube along the length direction of the boosting tube, one end of the sliding sleeve is fixedly connected with the first sleeve, and the sliding sleeve is coaxially arranged with the first sleeve, and the sliding sleeve is matched with the first matching part.

[0035] Optionally, the stent segmented conveying device further comprises a supporting piece for supporting the sliding sleeve, the supporting piece comprises a supporting rod and a roller, one end of the supporting rod is connected with the sliding sleeve, and the roller is rotatably connected with the other end of the supporting rod, and the roller abuts against the inner wall of the shell.

[0036] Optionally, the stent segmented conveying device further comprises a second sleeve, the second sleeve is used for penetrating through the shell, the second sleeve is sleeved in the boosting tube, the boosting tube is located between the inner wall of the first sleeve and the outer wall of the second sleeve, and one end of the second sleeve extending out of the shell is provided with a hooking part for hanging the stent.

[0037] Optionally, the hooking part is a protrusion protruding on the second sleeve.

[0038] Optionally, the stent segmented conveying device further comprises an inner core rod, the shell is provided with a mounting piece for mounting an endoscope, and the shell is slidably sleeved on the inner core rod to change the relative position between the mounting piece and the inner core rod.

[0039] Optionally, the stent segment conveying device further comprises an adjusting block, the housing is provided with an adjusting hole in communication with the inner cavity of the housing, and the adjusting block is located in the adjusting hole and is slidably connected to the housing to switch between a fourth state and a fifth state.

[0040] In the fourth state, the housing is slidable relative to the inner core rod.

[0041] In the fifth state, the housing is relatively fixed with the inner core rod.

[0042] Optionally, the clamping groove part comprises a plurality of clamping grooves arranged at intervals along the length direction of the inner core rod.

[0043] The embodiment further provides a stent segment conveying device, which comprises:

[0044] a housing;

[0045] a first sleeve, an open end of the first sleeve being used to cover a stent, and the first sleeve being slidably connected to the housing to change the relative position of the open end and the stent;

[0046] an operating member, the operating member comprising a handle and a telescopic rod, the handle being rotatably connected to the housing, one end of the telescopic rod being rotatably connected to the housing, and the other end of the telescopic rod being rotatably connected to the handle;

[0047] a cooperating member, the cooperating member being provided with a first cooperating part and a second cooperating part, the first cooperating part being rotatably cooperated with the first sleeve, and the second cooperating part being rotatably cooperated with the telescopic rod;

[0048] the handle is used to make the telescopic rod elongate or shorten during the rotation of the handle relative to the housing, so as to drive the first sleeve to slide relative to the housing through the cooperating member, and change the limit distance value of the sliding of the first sleeve relative to the housing.

[0049] In this way, the relative position of the open end and the stent changes during the sliding of the first sleeve relative to the housing, and the stent can be gradually released from the first sleeve. The handle is rotated relative to the housing, and the handle can drive the telescopic rod to elongate or shorten. When the telescopic rod elongates or shortens, the limit distance value of the sliding of the first sleeve relative to the housing can be changed, so that the length of the stent released from the first sleeve can be changed, and the stent segment conveying device can release the same stent in segments.

[0050] The embodiment further provides a stent segment conveying system, which comprises a stent and the above-mentioned stent segment conveying device, and the stent is sleeved in the first sleeve.

[0051] In this way, the stent segmented delivery system can also release the same stent in segments. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0053] Figure 1 A structural schematic diagram of the stent segmented delivery system provided by the embodiments of the present application is shown in the figure.

[0054] Figure 2 A sectional schematic diagram of the stent segmented delivery device provided by the embodiments of the present application is shown in the figure.

[0055] Figure 3 A structural schematic diagram of the cooperating member provided by the embodiments of the present application is shown in the figure.

[0056] Figure 4 A sectional schematic diagram of the telescopic rod in the first state provided by the embodiments of the present application is shown in the figure.

[0057] Figure 5 A sectional schematic diagram of the telescopic rod in the second state provided by the embodiments of the present application is shown in the figure.

[0058] Figure 6 A sectional schematic diagram of the telescopic rod in the third state provided by the embodiments of the present application is shown in the figure.

[0059] Figure 7 A structural schematic diagram of the stent hung on the hooking part in the first embodiment provided by the embodiments of the present application is shown in the figure.

[0060] Figure 8 A structural schematic diagram of the hooking part connected with the second sleeve provided by the embodiments of the present application is shown in the figure.

[0061] Figure 9 A structural schematic diagram of the stent hung on the hooking part in the second embodiment provided by the embodiments of the present application is shown in the figure.

[0062] Figure 10 A structural schematic diagram of the hooking part connected with the second sleeve provided by the embodiments of the present application is shown in the figure. Figure 2 An enlarged schematic diagram of A in the figure.

[0063] Figure 11 A sectional view of B-B in the figure. Figure 10 An enlarged schematic diagram of A in the figure.

[0064] Icon: 1 - stent segment conveying device; 11 - housing; 12 - first sleeve; 121 - open end; 13 - operating member; 131 - handle; 132 - telescopic rod; 1321 - first rod; 1322 - second rod; 13221 - first rod segment; 13222 - second rod segment; 1323 - first stop; 1324 - second stop; 1325 - guide block; 1326 - pressing member; 1327 - gap; 1328 - rotation axis; 1329 - first pressing part; 1330 - second pressing part; 1331 - third pressing part; 1332 - accommodating shell; 1334 - operating rod; 14 - fitting member; 141 - first fitting part; 142 - second fitting part; 143 - convex strip; 15 - first clamping part; 16 - second clamping part; 17 - second sleeve; 18 - sliding sleeve; 19 - third sleeve; 20 - supporting member; 201 - supporting rod; 202 - roller; 21 - hooking part; 22 - thin wire; 23 - inner core rod; 231 - clamping groove part; 24 - mounting member; 25 - adjusting block; 26 - adjusting hole; 27 - boost tube; 3 - stent; 4 - stent segment conveying system. DETAILED DESCRIPTION

[0065] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0066] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work fall within the scope of protection of the present application.

[0067] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0068] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0069] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] Embodiment 1

[0071] Please refer to Figure 1 The present embodiment provides a stent segment delivery system 4, which comprises a stent 3 and a stent segment delivery device 1, and the stent segment delivery device 1 is used to deliver the stent 3 to the patient's lesion to achieve the effect of treating diseases.

[0072] Specifically, please refer to Figure 1 and Figure 2 The present embodiment provides a stent segment delivery device 1, which comprises a housing 11, a first sleeve 12, an operating member 13 and a matching member 14, the open end 121 of the first sleeve 12 is used to cover the stent 3, and the first sleeve 12 is slidably connected to the housing 11 to change the relative position of the open end 121 and the stent 3. The operating member 13 is movably connected to the housing 11, the matching member 14 is provided with a first matching part 141 and a second matching part 142, the first matching part 141 cooperates with the first sleeve 12, the second matching part 142 cooperates with the operating member 13, and the operating member 13 is used to drive the first sleeve 12 to slide relative to the housing 11 through the matching member 14 when the operating member 13 moves relative to the housing 11. Among them, the number of first matching parts 141 is multiple, and selectively cooperates with the first sleeve 12 to change the limit distance value of the first sleeve 12 sliding relative to the housing 11.

[0073] It should be noted that in the embodiment, the relative position between the open end 121 and the stent 3 changes during the sliding of the first sleeve 12 along the length direction of the first sleeve 12 relative to the shell 11, and the stent 3 can be gradually released from the first sleeve 12. When the first sleeve 12 cooperates with different first matching parts 141, the limit distance of the sliding of the first sleeve 12 relative to the shell 11 can be changed, so that the maximum length of the stent 3 released from the first sleeve 12 can be changed, and thus the same stent 3 can be released in sections by the stent sectional delivery device 1. It should be noted that the stent 3 is released in sections, which is beneficial to the adjustment of the position of the stent 3 released by the staff, so that the subsequent release position is more accurate, and the treatment effect is improved.

[0074] It should be noted that in the embodiment, the number of the second matching parts 142 is also multiple, and selectively cooperates with the operating member 13 to change the limit distance value of the sliding of the first sleeve 12 relative to the shell 11. That is, when the operating member 13 cooperates with different second matching parts 142, the same stent 3 can also be released in sections by the stent sectional delivery device 1.

[0075] It should be noted that in the embodiment, the limit distance value refers to the maximum distance value of the first sleeve 12 withdrawn along the length direction of the first sleeve 12 relative to the shell 11. The “withdrawn” in the embodiment refers to the vertical upward direction in Figure 1 .

[0076] In actual use, when the staff releases the stent 3 in sections, the first sleeve 12 can be individually cooperated with different first matching parts 141. The operating member 13 can be individually cooperated with different second matching parts 142. The first sleeve 12 and the operating member 13 can be simultaneously cooperated with different first matching parts 141 and different second matching parts 142, respectively.

[0077] Please refer to Figure 2 and Figure 3 In the embodiment, the operating member 13 is rotationally connected with the shell 11, the first matching part 141 and the second matching part 142 are both slot structures, the first sleeve 12 is provided with a first clamping part 15, and the operating member 13 is provided with a second clamping part 16, and the first clamping part 15 and the second clamping part 16 are rotationally matched with the first matching part 141 and the second matching part 142, respectively.

[0078] Specifically, in the embodiment, the operating member 13 is hinged with the shell 11, the first clamping part 15 is directly clamped in the first matching part 141, and the second clamping part 16 is directly clamped in the second matching part 142.

[0079] It can be understood that, in the embodiment, in the process that the operating member 13 rotates relative to the shell 11, the second clamping portion 16 can be driven to rotate relative to the second matching portion 142, then the first matching portion 141 is driven to rotate relative to the first clamping portion 15 through the matching member 14, and the first sleeve 12 can be driven to move relative to the shell 11 along the length direction of the first sleeve 12, so as to gradually release the support 3 in the first sleeve 12.

[0080] It should be noted that, in other embodiments, the first matching portion 141 and the second matching portion 142 can also be solid parts on the matching member 14, and the first matching portion 141 and the second matching portion 142 can be respectively hinged with the first clamping portion 15 and the second clamping portion 16.

[0081] Please refer to Figure 3 In the embodiment, the matching member 14 is a long annular frame structure, the first matching portion 141 and the second matching portion 142 are respectively arranged at two ends of the matching member 14, and the first matching portion 141 and the second matching portion 142 are both arranged on the same side inner wall of the matching member 14, and the matching member 14 is used for covering the first clamping portion 15 and the second clamping portion 16.

[0082] In this way, after the matching member 14 is installed between the first sleeve 12 and the operating member 13, the staff can more easily distinguish the first matching portion 141 and the second matching portion 142, and it is convenient to adjust the position of the matching member 14 subsequently, so that different first matching portions 141 and different second matching portions 142 are matched with the first sleeve 12 and the operating member 13 respectively.

[0083] In addition, the matching member 14 covers the first clamping portion 15 and the second clamping portion 16, which not only can protect the first clamping portion 15 and the second clamping portion 16, but also can effectively reduce the situation that the first clamping portion 15 and the second clamping portion 16 are respectively separated from the first matching portion 141 and the second matching portion 142.

[0084] It should be noted that, the clamping groove structure of the first matching portion 141 and the second matching portion 142 can be formed by two adjacent protrusions 143 protruding on the inner wall of the matching member 14. It can also be formed by a protrusion 143 and the inner wall of the matching member 14, for example: Figure 2 In the state that the second clamping portion 16 is matched with the second matching portion 142.

[0085] It should be noted that, please refer to Figure 3In the embodiment, the plurality of first engaging portions 141 and the plurality of second engaging portions 142 are arranged side by side along the length direction of the engaging member 14, forming a zigzag structure. In actual use, the length of any two first engaging portions 141 in the length direction of the engaging member 14 can be equal or not equal. The length of any two second engaging portions 142 in the length direction of the engaging member 14 can be equal or not equal. The length of any one first engaging portion 141 and one second engaging portion 142 in the length direction of the engaging member 14 can be equal or not equal.

[0086] It should be noted that in the embodiment, the first clamping portion 15 and the second clamping portion 16 are both selected as a pin shaft. It can be understood that please refer to Figure 2 In the embodiment, the engaging member 14 is directly hung on the first clamping portion 15 and the second clamping portion 16, which is convenient for the installation and disassembly of the engaging member 14. That is, in the embodiment, when the staff uses the bracket sectional conveying device 1, directly adjusts the hanging position of the engaging member 14, so that the first clamping portion 15 can be matched with different first engaging portions 141, and correspondingly, the second clamping portion 16 can be matched with different second engaging portions 142.

[0087] Please refer to Figure 2 In the embodiment, the bracket sectional conveying device 1 further comprises a boost pipe 27 and a sliding sleeve 18. The boost pipe 27 is fixedly arranged inside the shell 11, and the first sleeve pipe 12 is slidably sleeved outside the boost pipe 27. The sliding sleeve 18 is slidably sleeved outside the boost pipe 27 along the length direction of the boost pipe 27, and the sliding sleeve 18 is fixedly connected to one end of the first sleeve pipe 12. The sliding sleeve 18 and the first sleeve pipe 12 are coaxially arranged, and the sliding sleeve 18 is matched with the first engaging portion 141.

[0088] Please refer to Figure 2 The operating member 13 comprises a handle 131 and a telescopic rod 132. The handle 131 is rotatably connected to the shell 11, and one end of the telescopic rod 132 is rotatably connected to the shell 11. The other end of the telescopic rod 132 is rotatably connected to the handle 131. The second engaging portion 142 is rotatably matched with the telescopic rod 132, and the first engaging portion 141 is rotatably matched with the first sleeve pipe 12.

[0089] Specifically, please refer to Figure 2 In the embodiment, the second clamping portion 16 is fixedly connected to the telescopic rod 132, and the first clamping portion 15 is fixedly connected to the sliding sleeve 18. The engaging member 14 can be rotatable relative to the first clamping portion 15 and the second clamping portion 16 at the same time.

[0090] In Figure 2In the placed state, when the handle 131 is rotated clockwise, the telescopic rod 132 is elongated, the fitting part 14 is rotated relative to the first clamping part 15 and the second clamping part 16, and the first sleeve 12 is moved upward by the sliding sleeve 18, so that the support 3 can be gradually released. When the handle 131 is rotated counterclockwise, the support 3 can be gradually retracted into the first sleeve 12, which will not be described here.

[0091] Please refer to Figure 2 It can be understood that, in the embodiment, after the first clamping part 15 cooperates with the first fitting part 141 at different positions, the maximum rotation angle of the handle 131 relative to the shell 11 can be changed, so that the limit distance value of the first sleeve 12 relative to the shell 11 is changed, to realize the function of releasing the same support 3 in sections. Similarly, after the second clamping part 16 cooperates with the second fitting part 142 at different positions, the maximum rotation angle of the handle 131 relative to the shell 11 can also be changed, which will not be described here.

[0092] It can be understood that, in the embodiment, the limit distance value is the distance that the first sleeve 12 retreats relative to the shell 11 when the handle 131 rotates the maximum angle relative to the shell 11. Specifically, the greater the maximum rotation angle of the handle 131 relative to the shell 11, the greater the limit distance value.

[0093] In Figure 2 In the placed state, the inventor found that when the handle 131 is rotated clockwise, the fitting part 14 exerts a rightward force on the sliding sleeve 18 and the first sleeve 12 through the first fitting part 141 and the first clamping part 15, which easily causes the boost tube 27 to bend, affects the sliding of the sliding sleeve 18 on the boost tube 27, and causes the release of the support 3 to be difficult.

[0094] Therefore, in the embodiment, the support section conveying device 1 further comprises a supporting part 20 for supporting the sliding sleeve 18. The supporting part 20 comprises a supporting rod 201 and a roller 202. One end of the supporting rod 201 is connected with the sliding sleeve 18, and the roller 202 is rotatably connected to the other end of the supporting rod 201. The roller 202 abuts against the inner wall of the shell 11.

[0095] It can be understood that, in the embodiment, the supporting part 20 can effectively prevent the boost tube 27 from bending.

[0096] In addition, in the embodiment, the supporting part 20 is located inside the shell 11. During the process that the sliding sleeve 18 drags the first sleeve 12 to move relative to the shell 11, the roller 202 rolls along the inner wall of the shell 11, and the friction is small, which is conducive to the movement of the first sleeve 12 relative to the shell 11.

[0097] Please refer to Figures 4-6In the embodiment, the telescopic rod 132 comprises a first rod 1321 and a second rod 1322, one end of the first rod 1321 is slidably connected to one end of the second rod 1322, the other end of the first rod 1321 is rotationally connected to the handle 131, and the other end of the second rod 1322 is rotationally connected to the shell 11.

[0098] It can be understood that, in the embodiment, the sliding of the first rod 1321 relative to the second rod 1322 is the process of the telescopic rod 132 being lengthened or shortened.

[0099] Specifically, in the embodiment, the second rod 1322 has a tubular structure with an opening (not shown in the figure) at one end, the end of the second rod 1322 away from the opening is rotationally connected to the shell 11, and the one end of the first rod 1321 is used to pass through the opening and is slidably sleeved in the second rod 1322 along the length direction of the second rod 1322, and the other end of the first rod 1321 is rotationally connected to the handle 131.

[0100] It should be noted that, in other embodiments, the second rod 1322 can also not be selected as a tubular structure, but can be provided with a sliding rail extending along the length direction of the second rod 1322 on the outer wall of the second rod 1322, and the first rod 1321 is slidably arranged on the sliding rail. In other embodiments, any structure capable of achieving the movement of the first rod 1321 relative to the second rod 1322 along the length direction of the second rod 1322 can be used.

[0101] Please refer to Figures 4-6 In the embodiment, the first rod 1321 is provided with a first stop portion 1323, and the second rod 1322 is provided with a second stop portion 1324, the second stop portion 1324 is used to abut against the first stop portion 1323 after the first rod 1321 slides relative to the second rod 1322 by a preset distance in a preset direction, so as to stop the first rod 1321 in the preset direction.

[0102] It should be noted that, in the embodiment, the preset direction is the downward direction in Figures 4-6 , that is, the lengthening direction of the telescopic rod 132. Of course, in other embodiments, the preset direction can also be the shortening direction of the telescopic rod 132.

[0103] It should be noted that, in the embodiment, when the first stop portion 1323 abuts against the second stop portion 1324, the bracket 3 has not been completely released, that is, part of the bracket 3 is still inside the first sleeve 12. At this time, the worker can adjust the position of the part of the bracket 3 that has been exposed out of the first sleeve 12, so as to make the subsequent release position more accurate. Generally, when the first stop portion 1323 abuts against the second stop portion 1324, the length of the part of the bracket 3 exposed out of the first sleeve 12 accounts for one half or two thirds of the total length of the bracket 3.

[0104] Specifically, please refer to Figures 4-6 In the embodiment, the telescopic rod 132 further comprises a guide block 1325, the second rod 1322 is provided with a guide groove (not shown in the figure) extending along the length direction of the second rod 1322, the guide block 1325 is connected with one end of the first rod 1321, part of the guide block 1325 is located inside the second rod 1322, and the other part of the guide block 1325 extends out of the second rod 1322 from the guide groove, the first stop portion 1323 is connected with the guide block 1325, and the first stop portion 1323 and the second stop portion 1324 are both located outside the second rod 1322. The first rod 1321 is used to drive the guide block 1325 to move along the guide groove in the process of sliding the first rod 1321 relative to the second rod 1322, so that the first stop portion 1323 is close to or away from the second stop portion 1324.

[0105] It can be understood that the guide block 1325 not only plays a guiding role, but also enables the first stop portion 1323 connected with the guide block 1325 to be arranged outside the second rod 1322, so that the first stop portion 1323 can abut against the second stop portion 1324.

[0106] Specifically, please refer to Figure 4 The telescopic rod 132 further comprises a pressing piece 1326, the first stop portion 1323 is a spring sheet, and the pressing piece 1326 is movably connected to the guide block 1325 to switch between the first state, the second state and the third state.

[0107] In the first state, as shown in Figure 5 , the first stop portion 1323 and the second rod 1322 have a gap 1327 capable of accommodating the second stop portion 1324, in the process of sliding the first rod 1321 relative to the second rod 1322, the second stop portion 1324 passes through the gap 1327, and the first stop portion 1323 does not abut against the second stop portion 1324.

[0108] In the second state, as shown in Figure 6 , the pressing piece 1326 presses the first stop portion 1323, the gap 1327 is reduced, in the process of sliding the first rod 1321 relative to the second rod 1322, the second stop portion 1324 cannot pass through the gap 1327, and the first stop portion 1323 is used to abut against the second stop portion 1324.

[0109] In the third state, as shown in Figures 4-6 , the pressing piece 1326 presses the first stop portion 1323 and makes the first stop portion 1323 abut against the second rod 1322, and the first rod 1321 and the second rod 1322 are relatively fixed.

[0110] It can be understood that, in the embodiment, the telescopic rod 132 is in the second state before the staff releases the support 3, the staff slides the first rod 1321 relative to the second rod 1322 in the process of gradually releasing the support 3, and the telescopic rod 132 is gradually lengthened. When the first stop portion 1323 abuts against the second stop portion 1324, the telescopic rod 132 cannot continue to be lengthened, and the support 3 cannot continue to be released. At this time, the staff adjusts the position of the part of the support 3 that has been outside the first sleeve 12. After the adjustment is completed, the pressing member 1326 is pressed to press the first stop portion 1323, the telescopic rod 132 is in the first state, the second stop portion 1324 can pass through the gap 1327, the telescopic rod 132 can continue to be lengthened, and thus the support 3 located behind in the first sleeve 12 can continue to be released.

[0111] It should be noted that, in the process of releasing the support 3, if it is necessary to urgently adjust the position of the support 3, the telescopic rod 132 can be switched to the third state, so that the first rod 1321 is relatively fixed with the second rod 1322, and thus the first sleeve 12 cannot move relative to the housing 11. When the adjustment is completed, the telescopic rod 132 can be switched to the first state or the second state again, and the release of the support 3 can continue.

[0112] It should be noted that, in other embodiments, the first stop portion 1323 and the second stop portion 1324 can also be located inside the second rod 1322. After the first stop portion 1323 abuts against the second stop portion 1324, the staff adjusts the position of the part of the support 3 that has been released, and then rotates the first rod 1321 relative to the second rod 1322, so that the first stop portion 1323 and the second stop portion 1324 are not in abutment. Then, the part of the support 3 located behind in the first sleeve 12 can be released.

[0113] Specifically, please refer to Figure 4 In the embodiment, the pressing member 1326 is a cam disc, the pressing member 1326 is rotatably connected to the guide block 1325 about the rotation axis line 1328, the pressing member 1326 is sequentially provided with a first pressing portion 1329, a second pressing portion 1330 and a third pressing portion 1331 in the circumferential direction of the pressing member 1326, and the distance from the second pressing portion 1330 to the rotation axis line 1328, the distance from the first pressing portion 1329 to the rotation axis line 1328 and the distance from the third pressing portion 1331 to the rotation axis line 1328 increase in sequence. As shown in Figure 5 , the first stop portion 1323 abuts against the second pressing portion 1330 in the first state. As shown in Figure 6 , the first stop portion 1323 abuts against the first pressing portion 1329 in the second state. As shown in Figures 4-6 , the first stop portion 1323 abuts against the third pressing portion 1331 in the third state.

[0114] It should be noted that in the present embodiment, the cam disc not only includes a disc-shaped member rotating around a fixed axis and having a varying diameter, but also can include an eccentric wheel, i.e. a disc structure whose rotation axis is not the center of the disc.

[0115] Please refer to Figures 4-6 In the present embodiment, the second rod 1322 includes a first rod segment 13221 and a second rod segment 13222 connected with the first rod segment 13221, the second stop portion 1324 is a step structure formed by the transition of the first rod segment 13221 and the second rod segment 13222, and the outer wall of the second rod segment 13222 protrudes from the outer wall of the first rod segment 13221, and the second rod segment 13222 is closer to the opening of the second rod 1322 relative to the first rod segment 13221. In this way, the processing and manufacturing of the second stop portion 1324 are facilitated.

[0116] It should be noted that in other embodiments, the second stop portion 1324 can also be a protrusion protruding on the second rod 1322, and the second stop portion 1324 can separate the second rod 1322 into corresponding first rod segment 13221 and second rod segment 13222.

[0117] Please refer to Figure 2 In the present embodiment, the telescopic rod 132 further includes a containing shell 1332 and an operating rod 1334, the containing shell 1332 is connected with the guide block 1325, the containing shell 1332 is an annular structure sleeved on the second rod 1322, the pressing piece 1326 and the first stop portion 1323 are both located in the containing shell 1332, the first stop portion 1323 is connected with the inner wall of the containing shell 1332, the pressing piece 1326 is movably connected with the containing shell 1332, one end of the operating rod 1334 is connected with the pressing piece 1326, and the other end of the operating rod 1334 extends out of the containing shell 1332.

[0118] It can be understood that the containing shell 1332 can protect the first stop portion 1323 and the pressing piece 1326, and the operating rod 1334 facilitates the staff to control the switching of the telescopic rod 132 between the first state, the second state and the third state.

[0119] Please refer to Figure 7 In the present embodiment, the bracket segment conveying device 1 further includes a second sleeve 17, the second sleeve 17 is used to pass through the shell 11, the second sleeve 17 is sleeved in the boost pipe 27, and the boost pipe 27 is located between the inner wall of the first sleeve 12 and the outer wall of the second sleeve 17.

[0120] Please refer to Figure 8 and Figure 9 In the present embodiment, one end of the second sleeve 17 extending out of the shell 11 is provided with a hooking portion 21 for hanging the bracket 3.

[0121] It should be noted that when the part of the stent 3 is exposed from the first sleeve 12, the staff can recycle the part of the stent 3 exposed from the first sleeve 12, and then release it after adjusting the position. In this embodiment, when the stent 3 is sleeved on the second sleeve 17, the stent 3 is hung on the hooking part 21 by using the thin wire 22. In this way, during the recycling process of the stent 3, the stent 3 is hung on the hooking part 21, so that the stent 3 is not easy to fall off, which is beneficial to improve the efficiency of recycling the stent 3. Of course, in other embodiments, the stent 3 can be directly hung on the hooking part 21.

[0122] It can be understood that in this embodiment, the stent 3 is sleeved on the pipe body of the second sleeve 17 extending out of the shell 11, and the stent 3 is arranged between the inner wall of the first sleeve 12 and the outer wall of the second sleeve 17.

[0123] It should be noted that in this embodiment, the stent 3 is made of elastic material. The stent 3 is sleeved on the second sleeve 17, and the first sleeve 12 is sleeved on the stent 3. When the stent 3 is gradually released from the first sleeve 12, the inner diameter of the stent 3 will expand and increase, so that the stent 3 can drive the thin wire 22 to separate from the hooking part 21, and then the second sleeve 17 can be directly separated from the stent 3, so that the stent 3 remains in the patient's disease position, and the purpose of treating diseases is achieved.

[0124] Please refer to Figure 7 In this embodiment, the stent segmented delivery device 1 further comprises a third sleeve 19, which is located between the inner wall of the boost pipe 27 and the outer wall of the second sleeve 17. The third sleeve 19 is sleeved on the second sleeve 17, and the third sleeve 19 and the stent 3 are arranged side by side on the second sleeve 17 along the length direction of the second sleeve 17. The hooking part 21 is an inner recess structure arranged on the third sleeve 19, one end of the thin wire 22 is embedded in the inner recess structure, and the other end of the thin wire 22 is used to hang on the stent 3.

[0125] It should be noted that please refer to Figure 8 and Figure 8 In other embodiments, the hooking part 21 can also be a protrusion protruding on the second sleeve 17.

[0126] Specifically, please refer to Figure 10 In other embodiments, the number of hooking parts 21 is multiple, and the multiple hooking parts 21 are spaced and uniformly distributed along the circumference of the second sleeve 17, which effectively improves the stability of the stent 3 hung on the hooking part 21.

[0127] Please refer to Figure 11 and Figure 10In the embodiment, the stent segmented delivery device 1 further comprises an inner core rod 23, the shell 11 is provided with a mounting member 24 for fixing connection to the channel port of the endoscope, and the shell 11 is slidably sleeved on the inner core rod 23 to change the relative position between the mounting member 24 and the inner core rod 23.

[0128] It should be noted that, in the embodiment, both ends of the inner core rod 23 can pass out of the shell 11 during the movement of the shell 11 relative to the inner core rod 23. In actual use, the staff holds one end of the inner core rod 23 and slides the shell 11 to adjust the position of the mounting member 24 relative to the inner core rod 23, so as to adjust the length of the first sleeve 12 in the channel port of the endoscope, and facilitate the staff to adjust the relative position between the stent 3 and the patient position.

[0129] Please refer to Figure 11 and Figure 1 In the embodiment, the stent segmented delivery device 1 further comprises an adjusting block 25, the inner core rod 23 is provided with a smooth portion (not shown in the figure) and a clamping groove portion 231, the shell 11 is provided with an adjusting hole 26 communicating with the inner cavity of the shell 11, the adjusting block 25 is located in the adjusting hole 26, and the adjusting block 25 is slidably connected to the shell 11 to switch between the fourth state and the fifth state. In the fourth state, the adjusting block 25 is located in the region corresponding to the smooth portion, and the shell 11 is slidable relative to the inner core rod 23. In the fifth state, the adjusting block 25 is clamped with the clamping groove portion 231, and the shell 11 is relatively fixed with the inner core rod 23.

[0130] It can be understood that, in the fourth state, the staff can slide the shell 11 to adjust the position of the shell 11 relative to the inner core rod 23, so as to adjust the position of the endoscope connected with the mounting member 24 relative to the inner core rod 23. In the fifth state, the shell 11 is relatively fixed with the inner core rod 23, and at this time the endoscope is in a preferred position, which is convenient for the staff to observe.

[0131] It should be noted that, the adjusting block 25 is located in the region corresponding to the smooth portion, which can be that the adjusting block 25 is spaced apart from the smooth portion, or the adjusting block 25 is in smooth contact with the smooth portion.

[0132] Specifically, in the embodiment, the clamping groove portion 231 comprises a plurality of clamping grooves which are spaced apart along the length direction of the inner core rod 23. In this way, when the shell 11 slides different distances relative to the inner core rod 23, the shell 11 can be kept in a relatively fixed state with the inner core rod 23.

[0133] In summary, the working principle of the stent segmented delivery device 1 provided in the embodiment is as follows:

[0134] Please refer to Figure 2 and Figure 5 , the handle 131 is rotated clockwise, and the telescopic rod 132 is inFigure 4 In the second state shown, the telescopic rod 132 is elongated, the fitting member 14 drives the sliding sleeve 18 and the first sleeve 12 to slide relative to the booster tube 27, and the stent 3 is gradually released from the first sleeve 12. After a certain length of the stent 3 is released, the first stop 1323 abuts against the second stop 1324, the telescopic rod 132 cannot be further elongated, and the position of the stent 3 that has been released is adjusted by the operator. After the adjustment is completed, the telescopic rod 132 is rotated by rotating the operating rod 1334, so that the telescopic rod 132 is in the ​ first state shown. The telescopic rod 132 is continuously elongated by continuously rotating the handle 131 in the clockwise direction, until the stent 3 is completely released from the first sleeve 12. During the process of the stent 3 being completely released, the stent 3 is expanded. After the stent 3 is completely released, the stent 3 is separated from the hooking portion 21, the second sleeve 17 is pulled out of the stent 3 by the operator, the stent 3 is left in the position of the patient, and the entire stent 3 delivery operation is completed.

[0135] Embodiment 2

[0136] The stent segment delivery device 1 provided in this embodiment comprises a housing 11, a first sleeve 12, an operating member 13, and a fitting member 14. The open end 121 of the first sleeve 12 is used to cover the stent 3, and the first sleeve 12 is slidably connected to the housing 11 to change the relative position of the open end 121 and the stent 3.

[0137] The operating member 13 comprises a handle 131 and a telescopic rod 132. The handle 131 is rotatably connected to the housing 11, and one end of the telescopic rod 132 is rotatably connected to the housing 11, and the other end of the telescopic rod 132 is rotatably connected to the handle 131.

[0138] The fitting member 14 is provided with a first fitting portion 141 and a second fitting portion 142. The first fitting portion 141 is rotatably fitted with the first sleeve 12, and the second fitting portion 142 is rotatably fitted with the telescopic rod 132.

[0139] The handle 131 is used to elongate or shorten the telescopic rod 132 during the rotation of the handle 131 relative to the housing 11, so as to drive the first sleeve 12 to slide relative to the housing 11 through the fitting member 14, to change the limit distance value of the sliding of the first sleeve 12 relative to the housing 11.

[0140] In this way, the relative position between the open end 121 and the stent 3 changes during the sliding of the first sleeve 12 relative to the housing 11, and the stent 3 can be gradually released from the first sleeve 12. The handle 131 rotates relative to the housing 11, and the handle 131 can drive the telescopic rod 132 to extend or shorten. When the telescopic rod 132 extends or shortens, the limit distance value of the sliding of the first sleeve 12 relative to the housing 11 can be changed, so that the length of the stent 3 released from the first sleeve 12 can be changed, and the stent segmented delivery device 1 can release the same stent 3 in segments.

[0141] The embodiment also provides a stent segmented delivery system 4, which includes the stent 3 and the stent segmented delivery device 1 mentioned in the embodiment, and the stent segmented delivery device 1 is used to deliver the stent 3 to the diseased part of the patient to achieve the effect of treating diseases.

[0142] It should be noted that the specific structure of the stent segmented delivery system 4 can refer to the content recorded in Embodiment 1.

[0143] The above is only a specific embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stent segmented conveying device, characterized in that: include: case; a first sleeve, wherein the open end of the first sleeve is used to cover the bracket, and the first sleeve is slidably connected to the housing to change the relative position of the open end and the bracket; An operating member, the operating member comprising a handle and a telescopic rod, the handle being rotatably connected to the housing, one end of the telescopic rod being rotatably connected to the housing, and the other end of the telescopic rod being rotatably connected to the handle; a mating piece, the mating piece being provided with a first mating portion and a second mating portion, the first mating portion being rotationally mated with the first sleeve, and the second mating portion being rotationally mated with the telescopic rod, the handle being configured to extend or shorten the telescopic rod during rotation of the handle relative to the housing, thereby driving the first sleeve to slide relative to the housing via the mating piece, thereby changing a limit distance of sliding of the first sleeve relative to the housing; There are multiple first matching parts, and they selectively match with the first sleeve to change the limit distance of the first sleeve sliding relative to the housing; And / or, the number of the second matching parts is plural, and one of them selectively matches with the operating member to change the limit distance of sliding of the first sleeve relative to the housing; The first fitting portion and the second fitting portion are both slot structures, the first sleeve is provided with a first clamping portion, the telescopic rod is fixedly connected with a second clamping portion, and the first clamping portion and the second clamping portion are respectively rotatably fitted with the first fitting portion and the second fitting portion.

2. The stent segmented delivery device according to claim 1, characterized in that: The first mating portions and the second mating portions are respectively arranged at both ends of the mating piece, and the first mating portions and the second mating portions are all arranged on the same inner wall of the mating piece along the length direction of the mating piece.

3. The stent segmented delivery device according to claim 1 or 2, characterized in that: The stent segmented delivery device further includes a booster tube and a sliding sleeve, wherein the booster tube is fixedly disposed inside the housing, and the first sleeve is slidably sleeved outside the booster tube; The sliding sleeve is slidably mounted on the outside of the booster tube along the length direction of the booster tube. The sliding sleeve is fixedly connected to one end of the first sleeve. The sliding sleeve is coaxially arranged with the first sleeve and cooperates with the first matching portion.

4. The stent segmented delivery device according to claim 3, characterized in that: The bracket segmented conveying device also includes a support member for supporting the sliding sleeve, and the support member includes a support rod and a roller. One end of the support rod is connected to the sliding sleeve, and the roller is rotatably connected to the other end of the support rod, and the roller abuts against the inner wall of the shell.

5. The stent segmented delivery device according to claim 3, characterized in that: The stent segmented conveying device also includes a third sleeve, which is used to pass through the shell. The third sleeve is arranged in the booster tube. The booster tube is located between the inner wall of the first sleeve and the outer wall of the third sleeve. The end of the third sleeve extending out of the shell is provided with a hook portion for hanging the stent.

6. The stent segmented delivery device according to claim 5, characterized in that: The hooking portion is a concave structure provided on the third sleeve.

7. The stent segmented delivery device according to claim 1 or 2, characterized in that: The stent segmented delivery device also includes an inner core rod. The shell is provided with a mounting piece for fixedly connecting to the endoscope clamp port. The shell can be slidably mounted on the inner core rod to change the relative position between the mounting piece and the inner core rod.

8. The stent segmented delivery device according to claim 7, characterized in that: The stent segmented delivery device further includes an adjustment block, the housing is provided with an adjustment hole communicating with the inner cavity of the housing, the adjustment block is located in the adjustment hole, and the adjustment block is slidably connected to the housing to switch between the fourth state and the fifth state; In the fourth state, the housing is slidable relative to the inner core rod; In the fifth state, the shell and the inner core rod are relatively fixed.

9. A stent segmented conveying device, characterized in that: include: case; a first sleeve, wherein the open end of the first sleeve is used to cover the bracket, and the first sleeve is slidably connected to the housing to change the relative position of the open end and the bracket; An operating member, the operating member comprising a handle and a telescopic rod, the handle being rotatably connected to the housing, one end of the telescopic rod being rotatably connected to the housing, and the other end of the telescopic rod being rotatably connected to the handle; A matching piece, wherein the matching piece is provided with a first matching portion and a second matching portion, the first matching portion is rotationally matched with the first sleeve, and the second matching portion is rotationally matched with the telescopic rod; The handle is used to extend or shorten the telescopic rod during the rotation of the handle relative to the housing, thereby driving the first sleeve to slide relative to the housing through the matching member to change the limit distance of the sliding of the first sleeve relative to the housing; The matching piece is a long ring frame structure.

10. The stent segmented delivery device according to claim 9, characterized in that: There are multiple first matching parts, and one of them selectively matches with the first sleeve to change the limit distance of sliding of the first sleeve relative to the housing; And / or, there are multiple second matching parts, and one of them selectively matches with the telescopic rod to change the limit distance of the first sleeve sliding relative to the housing.

11. The stent segmented delivery device according to claim 9, characterized in that: The telescopic rod includes a first rod and a second rod, one end of the first rod is slidably connected to one end of the second rod, the other end of the first rod is rotatably connected to the handle, and the other end of the second rod is rotatably connected to the housing.

12. The stent segmented delivery device according to claim 11, characterized in that: A first stop is provided on the first rod, and a second stop is provided on the second rod. The second stop is used to abut against the first stop after the first rod slides a preset distance along a preset direction relative to the second rod, so as to stop the first rod in the preset direction.

13. The stent segmented delivery device according to claim 12, characterized in that: The telescopic rod further includes a guide block, the second rod is provided with a guide groove extending along the length direction of the second rod, the guide block is connected to one end of the first rod, the first stopper is connected to the guide block, and the first stopper and the second stopper are both located outside the second rod; The first rod is used to drive the guide block to move along the guide groove when the first rod slides relative to the second rod, so that the first blocking portion approaches or moves away from the second blocking portion.

14. The stent segmented delivery device according to claim 13, characterized in that: The telescopic rod further includes a pressing member, the first resisting portion is a spring sheet, and the pressing member is movably connected to the guide block to switch between the first state, the second state and the third state; In the first state, a gap is provided between the first resisting portion and the second rod to accommodate the second resisting portion. When the first rod slides relative to the second rod, the second resisting portion passes through the gap, and the first resisting portion and the second resisting portion do not abut against each other. In the second state, the pressing member presses the first resisting portion, the gap is reduced, and when the first rod slides relative to the second rod, the second resisting portion cannot pass through the gap, and the first resisting portion is used to abut against the second resisting portion; In the third state, the pressing member presses the first blocking portion, causing the first blocking portion to press against the second rod, and the first rod and the second rod are relatively fixed.

15. The stent segmented delivery device according to claim 14, characterized in that: The telescopic rod also includes a accommodating shell and an operating rod. The accommodating shell is connected to the guide block. The accommodating shell is an annular structure sleeved on the second rod. The pressing piece and the first resisting portion are both located in the accommodating shell. The first resisting portion is connected to the inner wall of the accommodating shell. The pressing piece is movably connected to the accommodating shell. One end of the operating rod is connected to the pressing piece, and the other end of the operating rod extends out of the accommodating shell.

16. The stent segmented delivery device according to any one of claims 12 to 15, characterized in that: The second rod includes a first rod segment and a second rod segment connected to the first rod segment. The second resisting portion is a step structure formed by the transition between the first rod segment and the second rod segment. The outer wall of the second rod segment protrudes from the outer wall of the first rod segment. The second rod segment is close to the opening of the second rod relative to the first rod segment.

17. The stent segmented delivery device according to any one of claims 12 to 15, characterized in that: The stent segmented delivery device further includes a booster tube and a sliding sleeve, wherein the booster tube is fixedly disposed inside the housing, and the first sleeve is slidably sleeved outside the booster tube; The sliding sleeve is slidably mounted on the outside of the booster tube along the length direction of the booster tube. The sliding sleeve is fixedly connected to one end of the first sleeve. The sliding sleeve is coaxially arranged with the first sleeve and cooperates with the first matching portion.

18. The stent segmented delivery device according to claim 17, characterized in that: The bracket segmented conveying device also includes a support member for supporting the sliding sleeve, and the support member includes a support rod and a roller. One end of the support rod is connected to the sliding sleeve, and the roller is rotatably connected to the other end of the support rod, and the roller abuts against the inner wall of the shell.

19. The stent segmented delivery device according to claim 17, characterized in that: The stent segmented conveying device also includes a third sleeve, which is used to pass through the shell. The third sleeve is arranged in the booster tube. The booster tube is located between the inner wall of the first sleeve and the outer wall of the third sleeve. The end of the third sleeve extending out of the shell is provided with a hook portion for hanging the stent.

20. The stent segmented delivery device according to claim 19, characterized in that: The hooking portion is a concave structure provided on the third sleeve.

21. A stent segmented delivery system, characterized in that: It comprises one of the stent segmented delivery device according to any one of claims 1 to 8 and the stent segmented delivery device according to any one of claims 9 to 20, and a stent, wherein the stent is sleeved in the first sleeve.

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