Conveying device

Abstract

The application discloses a delivery device including a sheath core TIP head arranged at the distal end of the sheath core, a fixed anchor arranged on the outer wall of the sheath core and close to the proximal end of the TIP head, the sheath core is fixed relative to the TIP head, the fixed anchor is provided with a mounting position which can accommodate a pull wire. In the loading process of the stent, the pull wire exerts a force on the fixed anchor, the fixed anchor is fixedly connected with the sheath core, thereby driving the sheath core, the TIP head and the stent to move synchronously, since the pull wire does not directly contact, the situation that the stent is deformed due to the extrusion of the pull wire is avoided, in addition, the stent is loaded through the pull wire, the damage of the stent caused by the pushing sheath tube in the prior art is avoided, furthermore, the stent will not move in the loading process, thereby avoiding the situation that the stent is separated from the fixed anchor.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more particularly to a delivery device. Background Technology

[0002] As a novel treatment for cardiovascular diseases, stents are increasingly used in clinical practice, and delivery devices play an important role in stent loading and intravascular access establishment.

[0003] Before use, the bracket needs to be loaded into the sheath of the conveying device. The common loading method is to use a fixed anchor to hang the near end of the bracket, and then push the sheath core forward toward the far end of the conveying device to make the bracket enter the sheath; or use a pull line to pass through the bracket or wrap around the sheath core near the fixed anchor, and pull the pull line toward the far end of the conveying device for auxiliary assembly.

[0004] However, pushing the stent forward into the sheath tube without a pull wire and using only the sheath core as the force source can cause the sheath core to bend, deform, or break under stress; while using a pull wire as an auxiliary method may cause the stent to come out of the fixing anchor or cause the proximal end of the stent to deform during the pulling process. Summary of the Invention

[0005] The objective of this invention is to at least solve the problem of how to prevent stent dislodgement or damage during stent loading. This objective is achieved through the following technical solution:

[0006] The present invention provides a conveying device, the conveying device comprising a sheath core; a TIP head disposed at the distal end of the sheath core; and a fixing anchor disposed on the outer wall of the sheath core and near the proximal end of the TIP head, the sheath core being fixed relative to the TIP head, the fixing anchor having a mounting position for accommodating a pull wire.

[0007] In one embodiment, the fixed anchor includes: a fixing part disposed on the outside of the sheath core and fixed to the sheath core; an anchoring part used to anchor the bracket; and a base, through which the fixing part is connected to the anchoring part, and the mounting position is disposed on the base or the anchoring part.

[0008] In one embodiment, the mounting position includes a groove formed on the base, the opening of the groove facing the proximal end of the base; or the mounting position includes a through hole formed on the base, the through hole extending axially along the sheath core and axially penetrating the base; or the mounting position includes a via hole formed on the base, the via hole extending in a direction parallel to the radial direction of the sheath core and penetrating the base in that direction.

[0009] In one embodiment, the anchoring portion includes a plurality of rod-shaped members disposed at the distal end of the base and extending toward the distal end, and the mounting position includes a through hole formed on the rod-shaped members, the through hole extending axially along the sheath core.

[0010] In one embodiment, the number of through holes is two, and the through holes are arranged in opposite, adjacent or spaced-apart rod-shaped members.

[0011] In one embodiment, the TIP head includes a cylindrical segment with a fixing position provided on the cylindrical segment. The fixing position is arranged along the length direction of the cylindrical segment and can accommodate a pull wire.

[0012] In one embodiment, the TIP head further includes a first conical segment and a second conical segment; the first conical segment is coaxially disposed at the distal end of the cylindrical segment, and the second conical segment is coaxially disposed at the proximal end of the cylindrical segment and connected to the sheath core; the fixing position includes a through hole, the through hole is disposed along the length direction of the cylindrical segment and axially penetrates the cylindrical segment, the distal port of the through hole is located at the connection position of the first conical segment and the cylindrical segment, and the proximal port of the through hole is located at the connection position of the second conical segment and the cylindrical segment.

[0013] In one embodiment, the TIP head further includes a first conical segment and a second conical segment; the first conical segment is coaxially disposed at the distal end of the cylindrical segment, and the second conical segment is coaxially disposed at the proximal end of the cylindrical segment and connected to the sheath core; the fixing position includes a groove disposed along the length direction of the cylindrical segment, the opening of the groove is located on the outer surface of the cylindrical segment, the distal end of the groove is located at the connection position of the first conical segment and the cylindrical segment, and the proximal end of the groove is located at the connection position of the second conical segment and the cylindrical segment.

[0014] In one embodiment, the conveying device further includes a fixing member fitted onto the near end of the groove to secure the pull wire.

[0015] In one embodiment, the near end of the cylindrical segment is provided with a circumferential groove, which can accommodate the fixing member, so that the outer surface of the fixing member is flush with the outer surface of the cylindrical segment.

[0016] In summary, the conveying device of the present invention has the following beneficial effects:

[0017] When loading the bracket, the guy wire is threaded through the installation position of the fixed anchor. Pulling the fixed anchor moves the bracket into the sheath, thus avoiding deformation of the bracket caused by the sheath pushing. In addition, during the process of pulling the guy wire, the guy wire directly applies force to the fixed anchor, and the force is indirectly transmitted to the bracket, avoiding damage to the bracket by the guy wire. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the conveying device according to the present invention;

[0020] Figure 2 for Figure 1 A partial structural schematic diagram of the conveying device shown;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure of the first embodiment of the fixed anchor of the conveying device shown;

[0022] Figure 4 for Figure 2 A schematic diagram of the second embodiment of the fixed anchor of the conveying device shown;

[0023] Figure 5 for Figure 2 A schematic diagram of the third embodiment of the fixed anchor of the conveying device shown;

[0024] Figure 6 for Figure 5 A cross-sectional view of section AA of the fixed anchor shown;

[0025] Figure 7 for Figure 2 A schematic diagram of the fourth embodiment of the fixed anchor of the conveying device shown;

[0026] Figure 8 for Figure 7 A cross-sectional view of the BB section of the fixed anchor shown;

[0027] Figure 9 for Figure 7 The diagram shows the structure of the fixed anchor and the guy wire working together.

[0028] Figure 10 for Figure 9 A cross-sectional view of the CC section of the fixed anchor shown;

[0029] Figure 11 for Figure 9 A structural schematic diagram of the fixed anchor shown from another perspective;

[0030] Figure 12 for Figure 2A schematic diagram of the fifth embodiment of the fixed anchor of the conveying device shown;

[0031] Figure 13 for Figure 12 A cross-sectional view of the DD section of the fixed anchor shown;

[0032] Figure 14 for Figure 2 A schematic diagram of the structure of the first embodiment of the TIP head of the conveying device shown;

[0033] Figure 15 for Figure 14 A partial cross-sectional view of the TIP header shown;

[0034] Figure 16 for Figure 14 The radial cross-sectional view of the TIP head shown;

[0035] Figure 17 This is a schematic diagram of the structure of the fixed anchor of the fourth embodiment and the TIP head of the first embodiment for threading the guy wire;

[0036] Figure 18 for Figure 2 A schematic diagram of the second embodiment of the TIP head of the conveying device shown.

[0037] Figure label:

[0038] 100 represents a conveying device;

[0039] 10 represents the sheath;

[0040] 20 is the sheath core;

[0041] 30 is the fixed anchor, 31 is the fixing part, 32 is the base, 33 is the anchoring part, and 34 is the installation position;

[0042] 40 is the TIP head, 41 is the first conical section, 42 is the cylindrical section, 43 is the second conical section, and 44 is the fixed position;

[0043] 50 is the handle;

[0044] 60 is the pull line;

[0045] 70 is a fastener. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0049] In the field of interventional medical devices, the end closer to the operator is defined as the "proximal end," and the end farther from the operator is defined as the "distal end." Based on this principle, the "proximal end" and "distal end" of any component of a medical device are defined. "Axial direction" generally refers to the length direction of the medical device during delivery, while "radial direction" generally refers to the direction perpendicular to the "axial direction." Based on this principle, the "axial direction" and "radial direction" of any component of a medical device are defined.

[0050] Furthermore, the delivery device disclosed herein is not limited to delivering stents; it can also be used to deliver other implants similar to stents, without any limitation. The following will use stent loading as an example to further illustrate the technical solution of the present invention in detail with specific embodiments.

[0051] Please refer to Figure 1 and Figure 2This invention provides a conveying device 100, which includes a sheath 10, a sheath core 20, a tip 40, a fixing anchor 30, and a handle 50. The sheath core 20 is inserted into the inner cavity of the sheath 10 and is axially movable relative to the sheath 10. The tip 40 is located at the distal end of the sheath core 20. The fixing anchor 30 is provided on the outer wall of the sheath core 20, near the proximal end of the tip 40 and fixed relative to it. The fixing anchor 30 has a mounting position 34 for accommodating a pull cable. The proximal end of the sheath 10 is connected to the handle 50, and relative movement between the sheath 10 and the sheath core 20 can be achieved by operating the handle 50.

[0052] Specifically, the TIP head 40 is coaxially fixed to the distal end of the sheath core 20. The fixing anchor 30 is located on and fixed to the sheath core 20. The fixing anchor 30 is positioned near the proximal end of the TIP head 40. When loading the bracket, the proximal end of the bracket is anchored to the fixing anchor 30. Then, the pull wire 60 is threaded through the mounting position 34 of the fixing anchor 30. The two ends of the pull wire 60 are then inserted through the proximal end of the sheath tube 10 and exited through the distal end of the sheath tube 10, and then... Pulling the two ends of the pull wire 60 that passes through the distal end of the sheath 10 causes the TIP head 40, sheath core 20, fixing anchor 30, and bracket to enter the sheath 10 and move along the extension direction of the sheath 10. When the TIP head 40 protrudes from the distal end of the sheath 10 (only the TIP head 40 protrudes from the distal end of the sheath 10), the pull wire 60 and fixing anchor 30 can be separated to load the bracket into the conveying device 100.

[0053] During the loading process of the bracket, the pull wire 60 applies a force to the fixed anchor 30, and the fixed anchor 30 is fixed to the sheath core 20, thereby driving the sheath core 20, TIP head 40 and bracket to move synchronously. Since the pull wire 60 does not act directly on the bracket, the situation of the pull wire 60 squeezing the bracket and causing the bracket to deform is avoided. In addition, loading the bracket by the pull wire 60 avoids the damage to the bracket caused by pushing the sheath tube 10 in the prior art.

[0054] It should be noted that in this invention, the fixing anchor 30 is sleeved on the outside of the sheath core 20 and the two are fixed by welding or bonding. By connecting and fixing the fixing anchor 30 and the sheath core 20 by welding or bonding, the strength of the connection position between the fixing anchor 30 and the sheath core 20 can be effectively improved. When the pull wire is passed through the mounting position 34 of the fixing anchor 30 to load the bracket, the separation of the fixing anchor 30 and the sheath core 20 can be avoided, thereby ensuring the loading effect of the bracket.

[0055] In addition, the fixed anchor 30 is provided with an installation position 34. When loading the bracket, the near end of the bracket is anchored to the fixed anchor 30, and one end of the pull line 60 passes through the installation position 34 from the fixed anchor 30 and extends to the far end, so that both ends of the pull line are located at the far end of the installation position 34. Then, both ends of the pull line 60 are pulled to the far end at the same time to realize the loading of the bracket. Through the cooperation between the pull line 60 and the installation position 34, the position of the pull line 60 on the fixed anchor 30 is increased, the driving effect of the pull line 60 on the fixed anchor 30 is improved, and thus the loading efficiency of the bracket is improved.

[0056] To understand this further, such as Figure 3 As shown, the fixed anchor 30 includes a fixing part 31, an anchoring part 33, and a base 32. The fixing part 31 is sleeved on the outside of the sheath core 20 and fixed to the sheath core 20. The anchoring part 33 is used to anchor the bracket. The fixing part 31 is connected to the anchoring part 33 through the base 32. The mounting position 34 is provided on the base 32 or the anchoring part 33. The anchoring part 33 includes a plurality of rod-shaped members extending from the proximal end face of the base 32 toward the distal end, and the plurality of rod-shaped members form an accommodating space. Specifically, the fixing part 31 is connected to the proximal end of the base 32, and the anchoring part 33 is connected to the distal end of the base 32. The fixing part 31 is fitted on the outside of the sheath core 20 and is located near the TIP head 40 (the TIP head 40 is located at the distal end of the sheath core 20). The fixing part 31 and the sheath core 20 are connected and fixed by welding or bonding. The anchoring part 33 extends to the distal end of the sheath core 20. When the bracket is loaded, the pull wire 60 is inserted and engaged with the mounting position 34 on the fixing anchor 30. By pulling the pull wire 60 to the distal end, the TIP head 40, the bracket, and the sheath core 20 are inserted into the sheath tube 10 until the TIP head 40 protrudes from the end of the sheath tube 10, thus realizing the loading of the bracket.

[0057] It should be understood that the radial dimension of the base 32 is larger than the radial dimension of the fixing part 31, and the radial dimension of the anchoring part 33 is also larger than the radial dimension of the fixing part 31. The mounting position 34 can be provided on the base 32 or on the anchoring part 33.

[0058] It should be noted that the base 32, the anchoring part 33, and the fixing part 31 are coaxially arranged, and all three are coaxially arranged with the sheath core 20. When the pull wire 60 passes through the mounting position 34 of the fixing anchor 30 and drives the fixing anchor 30, it can effectively prevent the fixing anchor 30 from being offset, thereby avoiding damage during the mounting process of the bracket and ensuring the mounting effect of the bracket.

[0059] In some embodiments, the base 32, the anchoring part 33, and the fixing part 31 are an integral structure, and the fixing anchor 30 is produced by integral molding. This structure has high strength and good stability between the various parts, effectively avoiding the situation where the fixing anchor 30 is deformed and affects the loading effect of the support.

[0060] In some embodiments, the base 32, the anchoring part 33, and the fixing part 31 are separate structures, which can be connected and fixed by welding or bonding. The fixing anchor 30 of this structure is easy to process and effectively reduces manufacturing costs compared with the one-piece molded structure.

[0061] like Figures 1 to 3 As shown, in some embodiments, the mounting position 34 includes a groove formed on the base 32, with the opening of the groove facing the proximal end of the base 32. Specifically, the groove is formed on the base 32, and the opening of the groove faces the proximal end of the base 32. When the pull wire 60 engages with the fixed anchor 30, the pull wire 60 extends distally after passing through the groove. By setting the opening of the groove at the proximal end of the base 32, when the pull wire 60 moves distally to drive the fixed anchor 30, the sidewall of the groove limits the pull wire 60, preventing the pull wire 60 from separating from the fixed anchor 30. This improves the stability of the pull wire 60 driving the fixed anchor 30, thereby ensuring the loading effect of the bracket.

[0062] It should be noted that the depth of the groove is preferably greater than the outer diameter of the pull wire 60. When the pull wire 60 is inserted into the groove, the side wall of the groove is higher than the pull wire 60, which further improves the limiting effect on the pull wire 60 and prevents the pull wire 60 from coming out of the groove.

[0063] In addition, when there are multiple mounting positions 34 for the grooved structure, each mounting position 34 is equally spaced along the circumference of the base 32. When the pull wire 60 cooperates with each mounting position 34, it can ensure that the fixed anchor 30 is subjected to uniform and stable force, which further guarantees the loading effect of the bracket.

[0064] It is understood that in other embodiments, the number of slots may be only one, in which case the slot is provided around the surface of the base 32 facing the proximal end.

[0065] In addition, the inner surface of the groove is smooth, which reduces the friction between the groove and the wire 60. After the bracket is loaded, the friction is reduced, which reduces the resistance to the separation of the wire 60 from the groove.

[0066] like Figure 4As shown, in some embodiments, the mounting position 34 is a through hole formed on the base 32, which extends in a direction parallel to the radial direction of the sheath core 20 and penetrates the base 32 in that direction. Specifically, the through hole penetrates the radial direction of the base 32, and the two openings of the through hole are respectively located on the outer peripheral surface of the base 32. Taking two mounting positions 34 as an example, when the pull wire 60 is engaged with the fixed anchor 30, one end of the pull wire 60 enters through one end of one through hole and exits through the other end of the through hole. After exiting, the pull wire 60 enters through one end of another through hole and exits through the other end of the through hole. The pull wire 60 extends to the distal end after exiting. An external force acts on both ends of the pull wire 60 simultaneously and pulls the pull wire 60 to the distal end, thereby realizing the loading of the bracket.

[0067] Mounting position 34 is a through hole. When the pull wire 60 is inserted into the through hole, the inside of the through hole can limit the pull wire 60, which improves the fit strength between the pull wire 60 and the fixed anchor 30, and further avoids the separation of the two during the process of the pull wire 60 driving the fixed anchor 30, thus ensuring the effective loading of the bracket.

[0068] It should be noted that the diameter of the through hole is larger than the outer diameter of the pull wire 60. When the pull wire 60 is inserted into the through hole, it facilitates the separation of the pull wire 60 from the fixed anchor 30 after the bracket is installed.

[0069] In addition, when there are multiple mounting positions 34 with through holes, each mounting position 34 is equally spaced along the circumference of the base 32. When the pull wire 60 cooperates with each mounting position 34, it can ensure that the fixed anchor 30 is subjected to uniform and stable force, which further ensures the loading effect of the bracket.

[0070] In addition, the orifice opening is chamfered, which reduces the friction between the orifice opening and the pull wire 60, and also reduces the wear of the pull wire by the orifice opening. After the bracket is installed, the resistance to separation of the pull wire 60 from the orifice is reduced by reducing friction.

[0071] like Figures 5 to 8 As shown, in some embodiments, the mounting position 34 is a through hole formed on the base 32, extending axially along the sheath core 20. Specifically, the through hole penetrates the distal and proximal ends of the base 32 and extends axially along the sheath core 20. Taking two mounting positions 34 as an example, when the pull wire 60 is engaged with the fixed anchor 30, one end of the pull wire 60 enters through the distal end of one through hole and exits through the proximal end of the same through hole. After exiting, the pull wire 60 enters through the proximal end of another through hole and exits through the proximal end of the same through hole. The pull wire 60 extends distally after exiting. An external force acts simultaneously on both ends of the pull wire 60 and pulls the pull wire 60 distally, thereby achieving the loading of the bracket.

[0072] like Figures 9 to 11As shown, the mounting position 34 is a through hole. When the pull wire 60 is inserted into the through hole, the inside of the through hole can limit the pull wire 60, which improves the fit strength between the pull wire 60 and the fixed anchor 30, and further avoids the separation of the two during the process of the pull wire 60 driving the fixed anchor 30, thus ensuring the effective loading of the bracket.

[0073] It should be noted that the diameter of the through hole is larger than the outer diameter of the pull wire 60. When the pull wire 60 is inserted into the through hole, the side wall of the through hole is spaced apart from the pull wire 60. After the bracket is installed, it is convenient to separate the pull wire 60 from the fixed anchor 30.

[0074] In addition, when there are multiple mounting positions 34 with through-hole structure, each mounting position 34 is equally spaced along the circumference of the base 32. When the pull wire 60 cooperates with each mounting position 34, it can ensure that the fixed anchor 30 is subjected to uniform and stable force, which further ensures the loading effect of the bracket.

[0075] In addition, the opening of the through hole is rounded, which reduces the friction between the opening of the through hole and the pull wire 60, and also reduces the wear of the pull wire on the opening. After the bracket is loaded, the resistance to the separation of the pull wire 60 from the through hole is reduced by reducing friction.

[0076] Furthermore, such as Figure 12 and Figure 13 As shown, the anchoring part 33 includes a plurality of rod-shaped members, each rod-shaped member being disposed at the distal end of the base 32 and extending toward the distal end. The mounting position 34 includes through holes formed on at least a portion of the rod-shaped members, the through holes extending axially along the sheath core 20. Specifically, each rod-shaped member is connected to the distal end of the base 32, and the rod-shaped members are equally spaced along the circumference of the base 32, forming an accommodating space between the plurality of rod-shaped members. Each rod-shaped member is used to anchor the proximal end of the support and to confine the proximal corrugated portion of the support within the accommodating space.

[0077] The through-holes pass through the distal and proximal ends of the rod-shaped member and extend axially along the sheath core 20. Taking two mounting positions 34 as an example, when the pull wire 60 is engaged with the fixed anchor 30, one end of the pull wire 60 enters from the distal end of one through-hole and exits through the proximal end of the same through-hole. After exiting, the pull wire 60 wraps around the outer surface of the base 32 to the rod-shaped member of the next through-hole, then enters from the proximal end of another through-hole and exits through the proximal end of the same through-hole. After exiting, the pull wire 60 extends distally. External force acts simultaneously on both ends of the pull wire 60 and pulls the pull wire 60 distally, thereby achieving the loading of the bracket.

[0078] Mounting position 34 is a through hole. When the guy wire 60 is passed through the through hole, the inside of the through hole can limit the guy wire 60, improving the fit strength between the guy wire 60 and the fixed anchor 30. This further prevents the two from separating during the process of the guy wire 60 driving the fixed anchor 30, ensuring the effective loading of the bracket. In addition, by using the guy wire 60 to pass through the rod-shaped component, the fixing strength and stability between the guy wire 60 and the fixed anchor 30 are further improved, thus further enhancing the loading effect of the bracket.

[0079] It should be noted that the diameter of the through hole is larger than the outer diameter of the pull wire 60. When the pull wire 60 is inserted into the through hole, the side wall of the through hole is spaced apart from the pull wire 60. After the bracket is installed, it is convenient to separate the pull wire 60 from the fixed anchor 30.

[0080] In addition, the opening of the through hole is rounded, which reduces the friction between the opening of the through hole and the pull wire 60, and also reduces the wear of the pull wire by the opening. After the bracket is installed, the resistance to separation of the pull wire 60 from the through hole is reduced by reducing friction.

[0081] Furthermore, there are two through holes, and the two rod-shaped members with through holes are arranged opposite, adjacent, or spaced apart. Specifically, the mounting position of the through hole structure is opened on the rod-shaped member. When there are two through holes, by setting the two through holes on adjacent, opposite, or spaced-apart rod-shaped members respectively, when the pull wire 60 cooperates with the fixed anchor 30, the stability of the anchoring part 33 is further improved, and the loading effect of the bracket is further enhanced.

[0082] like Figure 14 and Figure 15 As shown, the TIP head 40 includes a first conical section 41, a second conical section 43, and a cylindrical section 42. The first conical section 41 is coaxially disposed at the distal end of the cylindrical section 42, and the second conical section 43 is coaxially disposed at the proximal end of the cylindrical section 42 and connected to the sheath core 20. A fixing position 44 is provided on the cylindrical section 42, which is arranged along the length of the cylindrical section 42 and can accommodate the pull wire. When loading the bracket, one end of the pull wire 60 passes through the mounting position 34 of the fixing anchor 30 in sequence. After passing through, the pull wire 60 passes through the fixing position 44 on the cylindrical section 42 and extends to the distal end. By pulling the pull wire 60 to the distal end, the bracket is loaded into the sheath tube 10, thereby realizing the loading of the bracket.

[0083] By setting a fixing position 44 on the TIP head 40, it is possible to prevent the pull line 60 from shifting or tangling, and also to prevent the pull line from protruding from the TIP head. This prevents the volume of the TIP head from increasing due to the pull line, which could cause the sheath or TIP head and inner and outer sheath cores to be squeezed, resulting in crushing or deformation.

[0084] It should be noted that the taper of the first conical section 41 is smaller than that of the second conical section 43, thereby improving the ease with which the TIP head 40 enters and exits the sheath tube 10.

[0085] It is understood that in other embodiments, the TIP header may also not include the first conical segment and / or the second conical segment.

[0086] In one embodiment, the fixing position 44 includes a through hole, which is arranged along the length of the cylindrical segment 42 and axially penetrates the cylindrical segment 42. The distal end of the through hole is located at the connection position of the first conical segment 41 and the cylindrical segment 42, and the proximal end of the through hole is located at the connection position of the second conical segment 43 and the cylindrical segment 42. Taking a case where there are two mounting positions 34 and two fixing positions 44, with mounting position 34 being a through hole penetrating the distal and proximal ends of the base 32, when loading the bracket, after anchoring the proximal end of the bracket to the fixing anchor 30, one end of the pull wire 60 enters from the distal end of one fixing position and exits through the proximal end of that fixing position, then enters from the distal end of one mounting position and exits through the proximal end of that mounting position. After exiting, the pull wire 60 bypasses the base, enters from the proximal end of another mounting position and exits through the distal end of that mounting position, then enters from the proximal end of another fixing position and exits through the distal end of that fixing position, extending distally. By pulling the pull wire 60 distally, the bracket is loaded into the sheath 10, thus achieving bracket loading. It is understood that the installation order of the pull wires is not limited to the above order, as long as the pull wire passes through the mounting position and the fixing position last, and both ends of the pull wire are located at the ends of the tip.

[0087] Since the through hole is located inside the cylindrical section 42, when the pull wire 60 passes through the through hole, the pull wire 60 will not cause an increase in the radial dimension of the cylindrical section 42 of the TIP head 40, and will not cause loading difficulties.

[0088] In addition, the opening of the through hole is rounded, which reduces the friction between the opening of the through hole and the pull wire 60, and also reduces the wear of the pull wire on the opening. After the bracket is installed, the resistance to the separation of the pull wire 60 from the through hole is reduced by reducing friction.

[0089] like Figure 16 As shown, the fixing position 44 is set on the cylindrical section 42 of the TIP head 40. The two fixing positions 44 are set at intervals along the circumference of the cylindrical section 42. The circumferential angle formed by the two fixing positions 44 on the same cross section of the cylindrical section 42 is α, where the range of α is 0°~180°, thereby improving the convenience of the layout of the pull wire 60. Figure 16 The through-hole on the tip for the guide wire to pass through is omitted.

[0090] like Figure 17As shown, there are two fixing positions 44 and two mounting positions 34. The line connecting the proximal ends of the two fixing positions 44 is parallel to the line connecting the two mounting positions 34. Specifically, when there are two fixing positions 44 and two mounting positions 34, by keeping the line connecting the proximal ends of the two fixing positions 44 parallel to the line connecting the two mounting positions 34, the twisting of the pull wire 60 is avoided, thereby ensuring the stability of the pull wire 60 driving the fixed anchor 30, and also ensuring the effective separation of the pull wire 60 from the fixed anchor 30.

[0091] Since the through slot is opened inside the cylindrical section 42, when the pull wire 60 passes through the through slot, the pull wire 60 will not cause an increase in the radial dimension of the cylindrical section 42 of the TIP head 40, further avoiding the influence of the pull wire 60 on the bracket and ensuring the loading effect of the bracket.

[0092] In addition, the inner surface of the through groove is smooth, which reduces the friction between the through groove and the pull wire 60. After the bracket is installed, the friction is reduced, which reduces the resistance to the separation of the pull wire 60 from the through groove.

[0093] In other embodiments, such as Figure 18 As shown, the fixing position can also be a groove formed on the surface of the cylindrical segment 42, extending along the length of the cylindrical segment 42, with its opening located on the outer surface of the cylindrical segment. The distal end of the groove is located at the connection position between the first conical segment and the cylindrical segment, and the proximal end of the groove is located at the connection position between the second conical segment and the cylindrical segment. To further fix the pull cable, the conveying device 100 also includes a fixing member 70, which is sleeved on the proximal end of the groove to fix the pull cable. It can be understood that, to reduce the impact of the fixing member 70 on the overall size of the TIP head 40, a circumferential groove can be provided on the cylindrical segment of the TIP head 40 at the location where the fixing member 70 is set, which can just accommodate the fixing member 70. In this case, the inner surface of the fixing member 70 can also be correspondingly provided with a groove to accommodate the pull cable.

[0094] It should be understood that the outer surface of the fastener 70 is flush with the outer surface of the cylindrical section 42, which avoids the impact of the fastener 70 on the bracket, further protects the bracket from damage, and improves the bracket's loading effect.

[0095] In summary, the conveying device of the present invention has the following beneficial effects:

[0096] 1. The mounting position and mounting hole are set on the fixed anchor and TIP head to avoid the pull wire protrusion, thereby avoiding the volume of the TIP head position from increasing due to the pull wire, which would cause the sheath or TIP head and inner and outer sheath cores to be squeezed, resulting in crushing or deformation.

[0097] 2. Setting the installation position on the fixed anchor avoids deformation of the sheath core compared to directly pushing the bracket by hanging it with the sheath core, and makes the bracket assembly easier. In addition, the tension is applied to the conveying device, avoiding damage to the bracket caused by directly piercing it, and the bracket will not move during the assembly process.

[0098] 3. Through the cooperation of the pull wire hole or groove and other pull wire fixing parts, the pull wire is made stable, without causing damage or affecting the sheath of the bracket and the conveying device, and can be smoothly withdrawn.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A delivery device characterized by, The delivery device comprises: a sheath tube; a sheath core arranged in the inner cavity of the sheath tube; a TIP head arranged at the distal end of the sheath core; a fixing anchor arranged on the outer wall of the sheath core and close to the proximal end of the TIP head, the sheath core is fixed relative to the TIP head, the fixing anchor comprises a fixing part, an anchoring part and a base part, the fixing part is arranged on the outside of the sheath core and is fixed with the sheath core, the anchoring part is used for anchoring a stent, the fixing part is connected with the anchoring part through the base part, the fixing anchor is provided with a mounting position, the mounting position is arranged on the base part or the anchoring part, the mounting position can accommodate a pull wire, under the driving of the pull wire, the TIP head, the sheath core, the fixing anchor and the stent enter into the sheath tube and move along the extension direction of the sheath tube.

2. The delivery device of claim 1, wherein, The mounting position comprises a cut groove opened on the base part, the opening of the cut groove faces the proximal end of the base part; or the mounting position comprises a through hole opened on the base part, the through hole extends along the axial direction of the sheath core and axially penetrates the base part; or the mounting position comprises a via hole opened on the base part, the via hole extends along the direction parallel to the radial direction of the sheath core and penetrates the base part along the direction.

3. The delivery device of claim 1, wherein, The mounting position comprises a through hole opened on the base part, the through hole extends along the axial direction of the sheath core and axially penetrates the base part; When the pull wire cooperates with the fixing anchor, one end of the pull wire enters from the distal end of one of the through holes and exits from the proximal end of the through hole, the pull wire after exiting enters from the proximal end of another of the through holes and exits from the distal end of the through hole, the pull wire after exiting extends to the distal end, and external force acts on both ends of the pull wire and pulls the pull wire to the distal end, so that the stent can be loaded.

4. The delivery device of claim 1, wherein, The anchoring part comprises a plurality of rod-shaped members, the rod-shaped members are arranged at the distal end of the base part and extend to the distal end, and the mounting position comprises a penetrating hole opened on the rod-shaped member, the penetrating hole extends along the axial direction of the sheath core.

5. The delivery device of claim 4, wherein, The number of the penetrating holes is two, and the penetrating holes are arranged on the opposite, adjacent or spaced rod-shaped members.

6. The delivery device of any one of claims 1 to 5, wherein, The TIP head comprises a cylindrical segment, the cylindrical segment is provided with a fixing position, the fixing position is arranged along the length direction of the cylindrical segment, and the fixing position can accommodate a pull wire.

7. The delivery device of claim 6, wherein, The TIP head further comprises a first conical segment and a second conical segment, the first conical segment is coaxially arranged at the distal end of the cylindrical segment, the second conical segment is coaxially arranged at the proximal end of the cylindrical segment and is connected with the sheath core, the fixing position comprises a through hole, the through hole is arranged along the length direction of the cylindrical segment and axially penetrates the cylindrical segment, the distal end port of the through hole is located at the connection position of the first conical segment and the cylindrical segment, and the proximal end port of the through hole is located at the connection position of the second conical segment and the cylindrical segment.

8. The delivery device of claim 6, wherein, The TIP head further comprises a first conical section coaxially arranged at the distal end of the cylindrical section, and a second conical section coaxially arranged at the proximal end of the cylindrical section and connected with the sheath core.

9. The delivery device of claim 8, wherein, The delivery device further comprises a fixing member, which is sleeved on the proximal end of the groove to fix the pull wire.

10. The delivery device of claim 9, wherein, The proximal end of the cylindrical section is provided with a circumferential groove, which can accommodate the fixing member so that the outer surface of the fixing member is flush with the outer surface of the cylindrical section.

Images