A delivery device

Abstract

The application is suitable for the field of interventional medical instruments, and discloses a delivery device. The delivery device comprises a sheath body, a retracted core and a top cover assembly. The retracted core is provided with a plurality of first pressing pieces, the plurality of first pressing pieces are arranged on the periphery of a sealing ring, and the outer side of the first pressing piece is provided with an inclined table. The top cover assembly is movably connected to the proximal end of the sheath body and moves relatively along the axial direction of the sheath body; the top cover assembly is provided with a plurality of second pressing pieces, the plurality of second pressing pieces are located on the outer side of the first pressing pieces, and the plurality of second pressing pieces are opposite to the inclined tables of the plurality of first pressing pieces along the axial direction of the sheath body. The delivery device provided by the application can effectively improve the stability and reliability of the delivery device, so as to facilitate the operation of medical staff, and reduce the operation risk.

Description

Technical Field

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

[0002] In the field of interventional therapy, the delivery device is the channel through which medical devices enter the human body, and it is an important component that determines whether interventional medical devices are accurate, minimally invasive, and safe.

[0003] In the prior art, in order to reduce repeated access of the delivery device, the sealing gasket of the delivery device is set to a closed but pre-cut and penetrated state. When the inner sheath core is loaded, the delivery device can pass the inner sheath core through the sealing ring to provide a certain degree of sealing. When the inner sheath core is removed, the sealing gasket will return to its initial shape, close the passage, and achieve a self-sealing effect. Other medical devices can also enter the human body through the passage of the delivery device.

[0004] However, due to the different specifications of the inner sheath core and medical devices, the sealing ring may be too tight or too loose, resulting in low stability and reliability of the delivery device, making the surgical procedure difficult and increasing the surgical risk. Summary of the Invention

[0005] The purpose of this application is to provide a conveying device that aims to improve the stability and reliability of the conveying device.

[0006] To achieve the above objectives, this application provides a conveying device, comprising:

[0007] The sheath tube body has a sheath core channel inside, and the sheath tube body includes a mounting groove that communicates with the sheath core channel and is located on the proximal side of the sheath core channel, and a sealing ring is loaded in the mounting groove;

[0008] The inner shrinking core is detachably installed at the proximal end of the sheath body and abuts against the sealing ring. The inner shrinking core has a first through hole arranged along the axial direction. The inner shrinking core has a plurality of first pressure plates extending toward the distal end along the circumferential direction. The plurality of first pressure plates are installed or abut against the mounting groove and surround the periphery of the sealing ring. The free end of the distal side of the first pressure plate protrudes outward to form a ramp.

[0009] A top cover assembly is detachably and movably connected to the proximal end of the sheath body and is movable relative to the sheath body in the axial direction of the sheath body. The top cover assembly is located on the proximal side of the inner core and has a second through hole arranged in the axial direction. The top cover assembly includes a plurality of second pressure plates arranged in the circumferential direction and extending toward the distal end. The plurality of second pressure plates are placed in the mounting groove and are located outside the plurality of first pressure plates. The plurality of second pressure plates are axially opposite to the plurality of inclined platforms. When the second pressure plates move axially toward the distal end, they can press and hold the inclined platforms from the outside.

[0010] In the conveying device of this application, the inner shrinking core is provided with a plurality of ribs located inside a plurality of first pressure plates. After the inner shrinking core is installed, the plurality of ribs abut against the sealing ring.

[0011] In the conveying device of this application, the sealing ring includes an installation part and a sealing part. The sealing part is located in the middle of the installation part and is provided with a cutting groove. The sealing part is divided by the cutting groove to form multiple cutting segments. The inclined platform covers the area where the cutting segments are located in the axial direction.

[0012] In the conveying device of this application, the bottom of the mounting groove is provided with a fixing groove, and the mounting part is embedded in the fixing groove.

[0013] In the conveying device of this application, a plurality of slots are distributed circumferentially at the proximal end of the inner shrinking core. The slots are configured to correspond to the first pressure plate. When the top cover assembly approaches the inner shrinking core from the proximal end to the distal end, the second pressure plate passes through the slots and abuts against the first pressure plate from the outside to the inside.

[0014] In the conveying device of this application, the inclined platform is provided with an inclined surface, which extends obliquely from the proximal end to the distal end of the sheath body in a direction away from the sealing ring.

[0015] In the conveying device of this application, the inclined platform includes multiple stepped platforms, and the thickness of the multiple stepped platforms gradually increases along the direction from the proximal end to the distal end of the sheath body; the distal end of the second pressing plate is provided with a buckle facing the first pressing plate, and the buckle can selectively cooperate with one of the multiple stepped platforms.

[0016] In the delivery device of this application, the proximal end of the sheath body includes a first connecting portion, and the inner core includes a second connecting portion. The first connecting portion and the second connecting portion are detachably connected so that the inner core is detachably fixed to the proximal end of the sheath body.

[0017] In the conveying device of this application, the first connecting part includes a snap-fit ​​groove, the snap-fit ​​groove includes a first axial groove and a first radial groove that are connected to each other, the first axial groove extends along the axial direction of the sheath body and opens at the proximal end of the sheath body, the first radial groove extends along the radial direction of the sheath body, and the second connecting part includes a mounting protrusion, the mounting protrusion moves from the opening of the first axial groove to the first radial groove, and moves along the radial direction of the sheath body to the end of the first radial groove, so that the inner core is fixed to the proximal end of the sheath body.

[0018] In the conveying device of this application, the top cover assembly includes a pressure inner core and a top cover. The top cover is movably connected to the proximal end of the sheath body. The top cover has a through hole. The pressure inner core has a plurality of second pressure plates and a connecting post connected to the proximal end of the plurality of second pressure plates. The proximal end of the connecting post passes through the through hole.

[0019] In the delivery device provided in this application, for different specifications of pushing devices, when the pushing device is in the loading state, the moving top cover assembly can drive multiple second pressure plates to move. These second pressure plates can then compress the inclined platforms of multiple first pressure plates, thereby controlling the circumferential compression of the sealing ring, thus controlling the sealing performance of the inserted pushing component and the resistance of the instrument's pushing component. When the instrument is withdrawn, the cutting groove of the sealing ring rebounds to achieve a seal. Even if the rebound effect deteriorates, the inner shrinking core can be controlled by the top cover assembly to press the circumference of the sealing ring to ensure a seal. The delivery device provided in this application ensures stable sealing performance when inserting or withdrawing pushing components of different specifications, preventing bleeding and facilitating instrument insertion and movement. Therefore, it can effectively improve the stability and reliability of the delivery device, making it easier for medical personnel to perform surgical operations and reducing surgical risks. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the conveying device provided in the embodiments of this application;

[0022] Figure 2 This is an exploded view of the conveying device provided in the embodiments of this application;

[0023] Figure 3This is one of the internal structural schematic diagrams of the conveying device provided in the embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of the sealing ring of the conveying device provided in the embodiments of this application;

[0025] Figure 5 This is one of the structural schematic diagrams of the inner core of the conveying device provided in the embodiments of this application;

[0026] Figure 6 yes Figure 2 Enlarged view of point A in the middle;

[0027] Figure 7 This is one of the structural schematic diagrams of the inner core of the conveying device provided in the embodiments of this application;

[0028] Figure 8 yes Figure 2 Enlarged view of point B in the middle;

[0029] Figure 9 This is a second schematic diagram of the internal structure of the conveying device provided in the embodiments of this application;

[0030] Figure 10 This is a second schematic diagram of the inner core of the conveying device provided in the embodiments of this application;

[0031] Figure 11 This is the second schematic diagram of the inner core of the conveying device provided in the embodiments of this application.

[0032] Explanation of icon numbers:

[0033] 10: Sheath body; 10a: Sheath core channel; 10b: Mounting groove; 11: Snap-fit ​​groove; 12: First thread structure;

[0034] 20: Sealing ring; 21: Sealing part; 211: Cutting groove; 212: Cutting flap; 22: Mounting part; 221: Recess;

[0035] 30: Inner core; 30a: First perforation; 31: First pressing plate; 32: Rib; 311: Inclined platform; 33: Mounting protrusion;

[0036] 40: Top cover assembly;

[0037] 41: Inner core; 41a: Second perforation; 411: Second pressing plate; 4111: Buckle; 412: Connecting post; 4121: Connecting protrusion;

[0038] 42: Top cover;

[0039] 43: Top cap; 431: Connecting groove; 432: Locking protrusion;

[0040] 50: Instruments. Detailed Implementation

[0041] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0042] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0043] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0044] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0045] To more clearly describe the structure of this application, the terms "proximal" and "distal" are used herein as conventional terms in the field of interventional medicine. Specifically, "distal" refers to the end furthest from the operator during the surgical procedure, "proximal" refers to the end closest to the operator during the surgical procedure, "axial" refers to its length direction, and "radial" refers to the direction perpendicular to the "axial".

[0046] During surgery, surgeons may need to repeatedly switch instruments through various entry points into the body. Because different instruments have different specifications, different delivery devices need to be used repeatedly. This process can potentially harm the patient, for example, by causing blood leakage, which could affect the smooth progress of the surgery. To address this, a special silicone sealing gasket can be placed inside the delivery sheath of the delivery device. The gasket is designed to be closed but pre-cut and penetrated. When the inner sheath core is loaded, the closed center of the sealing gasket expands through the cut shape to allow the inner sheath core to pass through, providing a certain degree of sealing. When the inner sheath core is withdrawn, the sealing gasket, due to the elasticity of the silicone material, springs back to its original closed shape the instant it is withdrawn, closing the passage and achieving a self-sealing effect. Subsequent instruments can also be inserted into the body through this delivery device, reducing the need for repeated entry points.

[0047] It's important to understand that the resistance encountered when the inner sheath core or other instruments enter and move within the delivery device is entirely controlled by the sealing gasket. Because the specifications of the inner sheath core and other instruments differ, an overly tight sealing gasket can cause difficulty in insertion or movement, while an overly loose gasket can lead to bleeding. Furthermore, since the inner sheath core is already installed within the sealing gasket when the delivery device is manufactured, and the gasket remains in an unfolded state during this period, the gasket material may gradually age over time, reducing its resilience. This can cause the gasket to fail to spring back promptly after the inner sheath core is removed, resulting in bleeding. Therefore, this leads to low stability and reliability of the delivery device, making surgical procedures difficult and increasing surgical risks.

[0048] Therefore, this application provides a delivery device that can effectively improve the stability and reliability of the delivery device, thereby facilitating surgical procedures and reducing surgical risks for medical personnel.

[0049] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] like Figures 1 to 3 As shown in the embodiment of this application, a conveying device 100 includes a sheath body 10, a sealing ring 20, an inner shrinking core 30, and a top cover assembly 40.

[0051] The sheath body 10 includes a sheath core channel 10a, and the proximal end of the sheath body 10 is provided with an installation groove 10b communicating with the sheath core channel 10a. A sealing ring 20 is provided in the installation groove 10b, and the sealing ring 20 includes a cutting groove 211 communicating with the sheath core channel 10a. An inner shrinking core 30 is detachably installed at the proximal end of the sheath body 10 and abuts against the sealing ring 20. The inner shrinking core 30 is provided with a first through hole 30a, which communicates with the cutting groove 211 of the sealing ring 20. That is, the first through hole 30a is arranged axially. The inner shrinking core 30 is provided with a plurality of first pressing plates 31, which are installed or abutted in the installation groove 10b and surround the periphery of the sealing ring 20. The free end of the distal side of the first pressing plate 31 protrudes outward to form a ramp 311. In this embodiment, the inner side refers to the side closer to the axis with reference to the axis, and the outer side refers to the side farther away from the axis with reference to the axis.

[0052] The top cover assembly 40 is detachably and movably connected to the proximal end of the sheath body 10 and moves relative to it along the axial direction of the sheath body 10. The top cover assembly 40 is located on the side of the inner core 30 away from the sealing ring 20 (i.e., the proximal side). The top cover assembly 40 is provided with a second through hole 41a that connects to the first through hole 30a and is arranged axially. The second through hole 41a, the first through hole 30a, and the cutting groove 211 can be regarded as part of the sheath core channel 10a, or as a means for the inner sheath core 50 to pass through under the same action. The top cover assembly 40 is provided with a plurality of second pressure plates 411. The plurality of second pressure plates 411 are placed in the mounting groove 10b and are located outside the plurality of first pressure plates 31. The plurality of second pressure plates 411 are opposite to the inclined platform 311 of the plurality of first pressure plates 31 along the axial direction of the sheath body 10. That is to say, the second pressure plates 411 can move axially to press and hold against and press the inclined platform 311.

[0053] In this embodiment, a plurality of slots 30b are distributed circumferentially at the proximal end of the inner shrinking core 30. The slots 30b are provided corresponding to the first pressure plate 31. When the top cover assembly 40 approaches the inner shrinking core 30 from the proximal end to the distal end, the second pressure plate 411 abuts against the first pressure plate 31 from the outside to the inside through the slots. The slots 30b play a limiting role in the relative rotation between the inner shrinking core 30 and the top cover assembly 40, and make the second pressure plate 411 in the correct position axially facing the first pressure plate.

[0054] The conveying device 100 provided in this application embodiment allows the cutting groove 211 of the sealing ring 20 to open, allowing the inner sheath core 50 to pass through. For inner sheath cores 50 of different specifications, when the inner sheath core 50 is in the loading state, the top cover assembly 40 can be moved to drive multiple second pressure plates 411 to move. The multiple second pressure plates 411 can then compress the inclined platforms 311 of multiple first pressure plates 31, thereby controlling the circumferential compression degree of the sealing ring 20, thus controlling the sealing performance of the inserted inner sheath core 50 and the resistance to the movement of the inner sheath core 50. When the inner sheath core 50 is withdrawn, the cutting groove 211 of the sealing ring 20 rebounds with the movement of the inner sheath core 50. Even if the rebound effect is poor, the top cover assembly 40 can control the inner shrinking core 30 to press the periphery of the sealing ring 20 to ensure sealing performance. The delivery device 100 provided in this application ensures stable sealing when inserting or removing inner sheath cores 50 of different specifications (i.e., sizes), preventing bleeding. Furthermore, since the sealing relies primarily on the top cover assembly 40, it does not affect the insertion and movement of the inner sheath core 50. Therefore, the stability and reliability of the delivery device 100 can be effectively improved, facilitating surgical procedures and reducing surgical risks.

[0055] It should be noted that the number of first pressure plates 31 and second pressure plates 411 is not limited, as long as it can be ensured that multiple second pressure plates 411 can be pressed towards the periphery of the sealing ring 20 by the inclined platform 311 of multiple first pressure plates 31. For example, four first pressure plates 31 and four second pressure plates 411 are provided.

[0056] In this embodiment, the inner sheath core 50 can be directly used to deliver other medical devices or simultaneously replaced with other delivery components. That is, this embodiment can be applied to the delivery stage of other medical devices such as valves, occluders, etc. This is because the inner core 30 and the top cover assembly 40 in this embodiment are both detachable and replaceable. In addition, it can be applied not only to different implant needs, but also to the replacement of the inner core 30 and the top cover assembly 40 (or the replacement of the top cover assembly 40 alone) to meet the expected sealing effect at different stages, such as taking into account the puncture stage and the delivery, release, and retrieval stages.

[0057] It is important to understand that the cutting groove 211 of the sealing ring 20 is used to seal the channel of the inner sheath core 50. When the inner sheath core 50 passes through, it passes through the cutting groove 211 and expands. Generally, the resilience of the sealing ring 20 itself allows the cutting groove 211 to press against the periphery of the inner sheath core 50. After the inner sheath core 50 is removed, the sealing ring 20 rebounds and closes, ensuring a certain degree of sealing. In this application, the top cover assembly 40 further controls the inner shrinking core 30 to further compress the periphery of the sealing ring 20, thereby further ensuring sealing. The style of the cutting groove 211 is not limited; it can be a cross-shaped cutting groove or a straight cutting groove, as long as it ensures that the cutting groove 211 can close after rebounding after the inner sheath core 50 is removed, thus achieving a seal.

[0058] like Figures 2 to 4As shown in the embodiment of this application, the sealing ring 20 includes a mounting part 22 and a sealing part 21. The sealing part 21 is located in the middle of the mounting part 22. The cutting groove 211 is provided in the sealing part 21. The sealing part 21 is divided by the cutting groove 211 to form a plurality of cutting segments 212. The inclined platform 311 is provided relative to the cutting segments 212. That is, the inclined platform 311 covers the area where the cutting segments 212 are located in the axial direction. In other words, when the cutting segments 212 are projected radially onto the surface of the inclined platform 311, the projection of the cutting segments 212 is completely covered by the inclined platform 311, so that when the inclined platform 311 moves radially, it causes the cutting segments 212 to deform. The mounting part 22 is used to securely install the sealing ring 20, and the sealing part 21 seals the sheath core channel 10a. When the inner sheath core 50 is loaded, the inner sheath core 50 compresses multiple cutting petals 212, causing the multiple cutting petals 212 to undergo elastic deformation. The inner sheath core 50 passes through the sealing ring 20, and the multiple cutting petals 212 are compressed on the periphery of the inner sheath core 50. When the conveying device 100 is not inserted with the inner sheath core 50 or when the inner sheath core 50 is removed, the multiple cutting petals 212 are combined into a whole to close, thereby sealing the conveying channel and ensuring that the conveying device 100 has a certain degree of sealing in any state. In this embodiment, the inclined platform 311 covers the area where the cutting petals 212 are located in the axial direction, so that when the inclined platform 311 moves radially, it causes the cutting petals 212 to deform. When the inclined platform 311 is squeezed by the top cover assembly 40, the inner shrinking core 30 will squeeze the sealing ring 20 located in the middle of the cutting petals 212. In this way, multiple cutting petals 212 are controlled to press against the middle of the sealing part 21, and the cutting groove 211 will not be stretched open due to the squeeze. This ensures that the sealing performance of the conveying device 100 is increased while being easy to operate and adjustable.

[0059] For example, the cutting groove 211 is a cross-shaped cutting groove, and the sealing part 21 is divided by the cutting groove 211 to form four cutting segments 212. Four first pressure plates 31 are provided, and the inclined platforms 311 of the four first pressure plates 31 are respectively set relative to the four cutting segments 212. The tangents of the inclined platforms 311 and the cutting groove 211 form an angle of 22.5° in the circumferential direction. In this way, when the inclined platforms 311 are pressed by the top cover assembly 40, the four first pressure plates 31 can press precisely against the two intersecting dividing lines of the cutting groove 211, which greatly increases the sealing performance of the delivery device 100 while facilitating operation and adjustment, and reduces the possibility of blood leakage during the operation. In some other examples, the cutting groove 211 is three tangents with an included angle of 120°, the sealing part 21 is divided by the cutting groove 211 to form three cutting lobes 212, and three first pressure plates 31 are correspondingly provided. The inclined platform 311 of the three first pressure plates 31 is respectively provided relative to the three cutting lobes 212, and the tangents of the inclined platform 311 and the cutting groove 211 are at an included angle of 60° in the circumferential direction.

[0060] For example, the sealing part 21 is made of silicone to ensure that it has good resilience and will not cause harm to the human body.

[0061] For example, the sealing part 21 is located in the middle of the mounting part 22 along the axial direction of the sheath body 10. Along the direction from the proximal end to the distal end of the sheath body 10, the inner diameter of the mounting part 22 first increases and then decreases, so that the inner sheath core 50 can be inserted through the sealing part 21 and the mounting part 22 will not affect the insertion of the inner sheath core 50.

[0062] like Figures 3 to 5 As shown in this embodiment, the inner shrinking core 30 is provided with multiple protruding ribs 32 located inside the multiple first pressure plates 31. After the inner shrinking core 30 is installed, the multiple protruding ribs 32 abut against the sealing ring 20. Specifically, the side wall of the sealing ring 20, i.e., the mounting part 22, is provided with multiple recesses 221, and the multiple protruding ribs 32 abut against the multiple recesses 221 respectively. Since the inner shrinking core 30 is fixed to the proximal end of the sheath body 10, the multiple protruding ribs 32 abut against the multiple recesses 221 respectively can ensure the relative position of the sealing ring 20 and the inner shrinking core 30, and prevent the sealing ring 20 from rotating relative to the inner shrinking core 30. In this way, the inclined platform 311 can stably compress the sealing ring 20. Furthermore, the multiple protruding ribs 32 abut against the multiple recesses 221 respectively can also press the sealing ring 20, so that the sealing ring 20 is stably installed in the mounting groove 10b.

[0063] like Figures 3 to 5 As shown in the embodiment of this application, multiple recesses 221 are located in the extension direction of the tangent of the cutting groove 211. Since the rib 32 abuts against the recesses 221 axially, placing the recesses 221 in the extension direction of the tangent of the cutting groove 211 ensures that the rib 32 abuts against the extension direction of the tangent. This provides stable support for the sealing ring 20 and does not affect the opening and closing of the cutting groove 211. In addition, by combining the aforementioned inclined platform 311 with the cutting flap, the abutment of the rib 32 can be avoided from affecting the pressing effect of the first pressure plate 31 on the sealing ring 20. The fixing and pressing of the sealing ring 20 do not affect each other, which is also beneficial for the top cover assembly 40 to control the sealing ring 20, thereby increasing the sealing performance of the conveying device 100 while ensuring convenient operation and adjustability.

[0064] For example, four recesses 221 and four ribs 32 are provided, with the four ribs 32 respectively abutting against the four recesses 221. The cutting groove 211 is a cross-shaped cutting groove 211, and the four recesses 221 are located in the extension direction of the tangent of the cutting groove 211. Four first pressing plates 31 are provided, and the inclined platforms 311 of the four first pressing plates 31 are respectively provided relative to the four cutting lobes 212.

[0065] like Figure 3As shown in this embodiment, the bottom of the mounting groove 10b is provided with a fixing groove, and the mounting part 22 is embedded in the fixing groove. By embedding the mounting part 22 in the fixing groove and combining it with the support of the inner shrinking core 30, the sealing ring 20 can be stably fixed in the sheath body 10, avoiding radial displacement, so as to ensure that the inner sheath core 50 can stably pass through the cutting groove 211 and be loaded into the conveying device 100.

[0066] like Figure 3 and Figure 5 As shown in this embodiment, the ramp 311 has an inclined surface that extends obliquely from the proximal end to the distal end of the sheath body 10 in a direction away from the sealing ring 20 (outer direction). When the top cover assembly 40 moves along the axial direction of the sheath body 10 towards the proximal end of the sheath body 10, the second pressure plate 411 presses against the ramp 311 of the first pressure plate 31 and abuts against the inclined surface of the ramp 311. Since the inclined surface extends obliquely from the proximal end to the distal end of the sheath body 10 in a direction away from the sealing ring 20, the distal end of the second pressure plate 411 gradually presses against the inclined surface, and the pressure of the first pressure plate 31 towards the sealing ring 20 gradually increases. In this way, by controlling the movement of the top cover assembly 40, the pressure on the circumference of the sealing ring 20 can be precisely controlled by the inner core 30, thereby controlling the sealing performance of the inserted inner sheath core 50 and controlling the resistance to the movement of the inner sheath core 50 to adapt to inner sheath cores 50 of different specifications. Improve the stability and reliability of the delivery device 100 to facilitate surgical procedures by medical staff and reduce surgical risks.

[0067] like Figures 9 to 11As shown, in another embodiment of this application, the ramp 311 includes multiple stepped platforms, the thickness of which gradually increases along the direction from the proximal end to the distal end of the sheath body 10. The distal end of the second pressure plate 411 is provided with a latch 4111 facing the first pressure plate 31, the latch 4111 being opposite to the multiple stepped platforms along the axial direction of the sheath body 10. When the top cover assembly 40 moves along the axial direction of the sheath body 10 towards the proximal end of the sheath body 10, the latch 4111 of the second pressure plate 411 presses against the ramp 311 of the first pressure plate 31, and sequentially abuts against the gradually increasing thickness of the ramp 311, allowing the degree of compression of the first pressure plate 31 towards the sealing ring 20 to change. Thus, by controlling the movement of the top cover assembly 40, the tightness of the sealing ring 20 can be precisely controlled by the inner shrinking core 30, thereby controlling the sealing performance of the inserted inner sheath core 50 and the resistance to the movement of the inner sheath core 50 to accommodate inner sheath cores 50 of different specifications. Furthermore, during the process of pressing the inclined platform 311 by the buckle 4111, the buckle 4111 can progressively engage the stepped platform, providing feedback to the operator, improving the operational feel, and providing timely feedback, making the surgical operation more convenient. It should be noted that, in this embodiment, the inner shrinking core 30 with the stepped platform can be used as a replacement, thus having a larger adjustable range compared to the inner shrinking core 30 of the aforementioned embodiment, allowing the operator to choose according to the actual situation.

[0068] For example, each stepped platform has beveled on both sides along the axial direction of the sheath body 10. Thus, when the latch 4111 of the second pressure plate 411 presses against each stepped platform, the degree of pressure gradually changes, resulting in more precise control. The beveled surfaces also make operation smoother. Furthermore, the feedback is clearer when the latch 4111 engages the stepped platform.

[0069] For example, the buckle 4111 has beveled surfaces on both sides along the axial direction of the sheath body 10, so that when the buckle 4111 is pressed against the inclined platform 311, the sealing ring 20 will not get stuck.

[0070] For example, the ramp 311 includes three stepped platforms, and the latch 4111 can be sequentially fastened to the three stepped platforms to provide the operator with three progressive transmission feedbacks.

[0071] like Figure 3 , Figure 5 and Figure 6As shown in this embodiment, the proximal end of the sheath body 10 is provided with a snap-fit ​​groove 11, and the inner shrinking core 30 is provided with a mounting protrusion 33. The mounting protrusion 33 is fixed in the snap-fit ​​groove 11 so that the inner shrinking core 30 is fixed to the proximal end of the sheath body 10. By fixing the mounting protrusion 33 in the snap-fit ​​groove 11, the inner shrinking core 30 can be fixed to the proximal end of the sheath body 10, and the sealing ring 20 can be further stabilized, ensuring the stability and reliability of the delivery device 100. Furthermore, the inner shrinking core 30 can be removed from the sheath body 10 as needed to replace the sealing ring 20 and the inner shrinking core 30 with other specifications, thereby further accommodating more inner sheath cores 50 to meet surgical needs and ensure the stability of the delivery device 100 during surgery. For example, the sealing ring 20 and the inner shrinking core 30 can be replaced as needed to accommodate inner sheath cores of different specifications.

[0072] Specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, in this embodiment, the snap-fit ​​groove 11 includes a first axial groove and a first radial groove that are connected to each other. The first axial groove extends along the axial direction of the sheath body 10 and opens at the proximal end of the sheath body 10. The first radial groove extends along the radial direction of the sheath body 10. The mounting protrusion 33 moves from the opening of the first axial groove to the first radial groove and moves along the radial direction of the sheath body 10 to the end of the first radial groove, so that the inner shrinking core 30 is fixed to the proximal end of the sheath body 10. In this embodiment, the snap-fit ​​groove 11 is an L-shaped groove. When the inner shrinking core 30 is installed at the proximal end of the sheath body 10, the mounting protrusion 33 can enter the first axial groove from the opening of the first axial groove. Then, the inner shrinking core 30 is moved axially until the mounting protrusion 33 moves to the first radial groove. Then, the inner shrinking core 30 is rotated radially so that the mounting protrusion 33 is snapped by the first radial groove, thereby preventing the inner shrinking core 30 from detaching from the sheath body 10 axially. Furthermore, it should be noted that after the inner retractable core 30 is installed, its protruding rib 32 abuts against the recess of the sealing ring 20. When it is necessary to remove the inner retractable core 30 from the sheath body 10, the operation can be reversed.

[0073] In another embodiment, the mounting protrusion may be provided inside the sheath body 10, and the snap-fit ​​groove may be provided on the inner shrinking core 30. That is, the proximal end of the sheath body 10 includes a first connecting part, and the inner shrinking core 30 includes a second connecting part. The first connecting part and the second connecting part are detachably connected.

[0074] For example, the inner shrink core 30 is provided with four mounting protrusions 33 to correspond to the four snap-fit ​​grooves 11 of the sheath body 10. When the snap-fit ​​grooves 11 are L-shaped grooves, the extension directions of the first radial grooves of the four snap-fit ​​grooves 11 are consistent, so as to facilitate the assembly and disassembly of the inner shrink core 30. In addition, the four mounting protrusions 33 can also ensure the stable installation of the inner shrink core 30. Furthermore, the inner shrink core 30 is provided with four first pressure plates 31 and four ribs 32. The four mounting protrusions 33 and the four ribs 32 are opposite to each other and located between the four first pressure plates 31, so as to avoid the mounting protrusions 33 affecting the compression of the first pressure plates 31 by the second pressure plates 411.

[0075] In some other embodiments, the snap-fit ​​groove 11 is a hole on the inner wall of the proximal end of the inner sheath core. When installing the inner shrinking core 30, the mounting protrusion 33 is embedded in the snap-fit ​​groove 11 to fix the inner shrinking core 30.

[0076] In other embodiments, the inner core 30 may also be integrally formed with the sheath body 10.

[0077] like Figure 3 , Figure 7 and Figure 8 As shown in this embodiment, the top cover assembly 40 includes a pressing inner core 41, a top cover 42, and a top cover 43. The top cover 42 is movably connected to the proximal end of the sheath body 10 and has a through hole. The pressing inner core 41 has a plurality of second pressing plates 411 and a connecting post 412 passing through the through hole. The top cover 43 is fixedly connected to the connecting post 412 and is located on the proximal side of the top cover 42. The top cover 42 is located between the pressing inner core 41 and the top cover 43. Therefore, when the top cover 43 moves, it can abut against the pressing inner core 41 to drive the pressing inner core 41 to move, so as to tighten the sealing ring 20 through the inner shrinking core 30. Alternatively, the top cover 42 can also abut against the top cover 43 to drive the pressing inner core 41 to move, so as to relax the sealing ring 20 through the inner shrinking core 30. In this way, the movement of the top cover 42 relative to the sheath body 10 can drive the inner core 41 to move, thereby causing the second pressure plate 411 to press the first pressure plate 31, thus tightening or loosening the sealing ring 20. This structure facilitates assembly and ensures the reliability of the assembled product. For example, when assembling the top cover assembly 40, the inner core 41 can be assembled on the far end of the sheath body 10 first, so that it can cooperate with the inner core 30. Then, the top cover 42 is sleeved on the connecting post 412 and connected to the far end of the sheath body 10. Finally, the top cover 43 is fixed to the connecting post 412.

[0078] For example, a second perforation 41a is formed in the inner core 41 to allow the inner sheath core 50 to pass through the conveying device 100.

[0079] For example, the connecting post 412 has a connecting protrusion 4121 on its periphery, and the top cover 43 has a connecting groove 431. The connecting groove 431 includes a second axial groove and a second radial groove. The second axial groove extends along the axial direction of the top cover 43 and opens at the distal end of the top cover 43. The second radial groove extends along the radial direction of the top cover 43. When installing the top cover 43, the top cover 43 is sleeved on the connecting post 412, and the connecting protrusion 4121 is placed at the opening of the second axial groove. The top cover 43 is moved axially so that the connecting protrusion 4121 enters the second radial groove. By rotating the top cover 43 radially, the connecting protrusion 4121 is locked by the second radial groove, thereby completing the fixation of the top cover 43. Furthermore, the connecting post 412 has two connecting protrusions 4121 on its periphery, and correspondingly, the top cover 43 has two connecting grooves 431. The two connecting protrusions 4121 can be placed in the two connecting grooves 431 respectively to stably fix the top cover 43 onto the inner core 41. Furthermore, a locking protrusion 432 is provided in the second radial groove. When the connecting protrusion 4121 is placed at the bottom of the second radial groove, the locking protrusion 432 can restrict the connecting protrusion 4121 from moving towards the second axial groove, thereby restricting the rotation of the top cover 43 and ensuring that the top cover 43 is stably fixed onto the inner core 41.

[0080] For example, the outer periphery of a plurality of second pressure plates 411 is adapted to the mounting groove 10b. In this way, the mounting groove 10b can be used to limit the outward displacement of the second pressure plates 411 when the pressure ramp 311 is pressed, thus ensuring stable control of the sealing ring 20.

[0081] like Figure 2 , Figure 3 and Figure 6 As shown in a further embodiment of this application, the proximal end of the sheath body 10 is provided with a first threaded structure 12, and the top cover 42 is provided with a second threaded structure. The first threaded structure 12 and the second threaded structure are threadedly connected, so that the top cover 42 can move relative to the sheath body 10 along the axial direction of the sheath body 10 by rotation. In this way, the top cover 42 can move relative to the sheath body 10 by rotation. During the movement, it can drive the inner core 41 to move, thereby driving the second pressure plate 411 to squeeze the first pressure plate 31, so as to tighten or loosen the sealing ring 20. When operating, medical staff only need to rotate the top cover 42 to control the sealing ring 20, which is simple to operate and more precise to control.

[0082] For example, the first thread structure 12 is an external thread on the periphery of the sheath body 10, and the second thread structure is an internal thread on the inner periphery of the top cover 42. The top cover 42 is sleeved on the proximal end of the sheath body 10 and threadedly connected to the sheath body 10.

[0083] like Figure 1 and Figure 3As shown in this embodiment, the distance between the base of the top cap 43 and the connecting post 412 is greater than the length of the through hole. That is, the distance between the top cap 43 and the platform of the inner core 41 is greater than the thickness of the cap. This ensures that whether the top cap 42 is moved towards the proximal or distal end of the sheath body 10, there is sufficient space for the top cap 42 to move, preventing accidental contact with the top cap 42 and affecting the sealing performance of the sealing ring 20. Of course, in other embodiments, the distance between the base of the top cap 43 and the connecting post 412 can also be the same as the length of the through hole, making the overall structure of the top cap assembly 40 stable and reliable.

[0084] In some other embodiments, the top cover assembly 40 may also be integrally formed. Furthermore, in order to enable the top cover assembly 40 to move relative to the sheath body 10, a groove may be provided on the periphery of the sheath body 10, and a slider may be provided on the inner side of the top cover assembly 40. The slider is placed in the groove and slides, which enables the top cover assembly 40 to move relative to the sheath body 10 in the axial direction. In turn, the movement of the second pressure plate 411 can squeeze the first pressure plate 31 to control the tightening and loosening of the sealing ring 20.

[0085] like Figures 1 to 3 As shown, this application also provides a conveying device 100, including any of the conveying devices 100 described above.

[0086] The delivery device 100 provided in this application embodiment ensures stable sealing when inserting or removing inner sheath cores 50 of different specifications, preventing bleeding and leakage. It also facilitates the insertion and movement of the inner sheath core 50. Therefore, it effectively improves the stability and reliability of the delivery device 100, making it easier for medical personnel to perform surgical procedures and reducing surgical risks.

[0087] In this embodiment of the application, the delivery device 100 further includes a sheath tube connected to the distal end of the sheath tube body 10, which is used to extend into the human body to form a channel so as to facilitate the insertion and withdrawal of the inner sheath core 50.

[0088] In this embodiment, the delivery device 100 further includes an inner sheath core 50 that passes through the first perforation 30a, the second perforation 41a, the cutting groove 211, and the sheath core channel 10a. The inner sheath core 50 includes, but is not limited to, inner sheath cores and other medical devices.

[0089] During use, the delivery device 100 of this application allows for the following functions: When loading the inner sheath core, the top cover assembly 40 can be moved to move multiple second pressure plates 411. These second pressure plates 411 then compress the inclined platform 311 of multiple first pressure plates 31 to control the circumferential compression of the sealing ring 20, thereby ensuring the sealing performance of the sealing ring 20 to the delivery channel. When removing the inner sheath core, to facilitate its movement, the top cover assembly 40 can be moved away from the sheath body 10, reducing the compression of the inclined platform 311 by the second pressure plates 411 and thus reducing the resistance to the inner sheath core's movement, facilitating its removal. After the inner sheath core is removed and no other medical devices are loaded, the top cover assembly 40 can be moved to increase the compression of the inclined platform 311 by the second pressure plates 411, ensuring a tight seal by pressing the circumference of the sealing ring 20 with the first pressure plates 31. When other medical devices need to be loaded, the top cover assembly 40 can also be moved to control the damping when other medical devices enter and ensure the sealing performance of the delivery channel.

[0090] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A conveying device, characterized in that, include: The sheath tube body has a sheath core channel inside, and the sheath tube body includes a mounting groove that communicates with the sheath core channel and is located on the proximal side of the sheath core channel, and a sealing ring is loaded in the mounting groove; The inner shrinking core is detachably installed at the proximal end of the sheath body and abuts against the sealing ring. The inner shrinking core has a first through hole arranged in the axial direction. The inner shrinking core has a plurality of first pressure plates extending toward the distal end in the circumferential direction. The plurality of first pressure plates are installed in the mounting groove and surround the periphery of the sealing ring. The free end of the distal end of the first pressure plate protrudes outward to form a ramp. A top cover assembly is detachably and movably connected to the proximal end of the sheath body and is movable relative to the sheath body in the axial direction of the sheath body. The top cover assembly is located on the proximal side of the inner core and has a second through hole arranged in the axial direction. The top cover assembly includes a plurality of second pressure plates arranged in the circumferential direction and extending toward the distal end. The plurality of second pressure plates are placed in the mounting groove and are located outside the plurality of first pressure plates. The plurality of second pressure plates are axially opposite to the plurality of inclined platforms. When the second pressure plates move axially toward the distal end, they can press and abut against the inclined platforms from the outside to tighten the sealing ring.

2. The conveying device as described in claim 1, characterized in that, The inner shrinking core is provided with multiple ribs located inside the multiple first pressure plates. After the inner shrinking core is installed, the multiple ribs abut against the sealing ring.

3. The conveying device as described in claim 2, characterized in that, The sealing ring includes an installation part and a sealing part. The sealing part is located in the middle of the installation part and has a cutting groove. The sealing part is divided by the cutting groove to form multiple cutting segments. The inclined platform covers the area where the cutting segments are located in the axial direction.

4. The conveying device as described in claim 3, characterized in that, The bottom of the mounting groove is provided with a fixing groove, and the mounting part is embedded in the fixing groove.

5. The conveying device as described in claim 1, characterized in that, Multiple slots are distributed circumferentially at the proximal end of the inner shrinking core. The slots correspond to the first pressure plate. When the top cover assembly approaches the inner shrinking core from the proximal end to the distal end, the second pressure plate passes through the slots and abuts against the first pressure plate from the outside to the inside.

6. The conveying device according to any one of claims 1 to 5, characterized in that, The ramp is provided with an inclined surface, which extends obliquely from the proximal end to the distal end of the sheath body in a direction away from the sealing ring.

7. The conveying device according to any one of claims 1 to 5, characterized in that, The inclined platform includes multiple stepped platforms, and the thickness of the multiple stepped platforms gradually increases along the direction from the proximal end to the distal end of the sheath body; the distal end of the second pressure plate is provided with a buckle facing the first pressure plate, and the buckle can selectively cooperate with one of the multiple stepped platforms.

8. The conveying device according to any one of claims 1 to 5, characterized in that, The proximal end of the sheath body includes a first connecting portion, and the inner core includes a second connecting portion. The first connecting portion and the second connecting portion are detachably connected so that the inner core is detachably fixed to the proximal end of the sheath body.

9. The conveying device as described in claim 8, characterized in that, The first connecting portion includes a snap-fit ​​groove, which includes a first axial groove and a first radial groove that are connected to each other. The first axial groove extends along the axial direction of the sheath body and opens at the proximal end of the sheath body. The first radial groove extends along the radial direction of the sheath body. The second connecting portion includes a mounting protrusion, which moves from the opening of the first axial groove to the first radial groove and moves along the radial direction of the sheath body to the end of the first radial groove, so that the inner core is fixed to the proximal end of the sheath body.

10. The conveying device according to any one of claims 1 to 5, characterized in that, The top cover assembly includes a pressure inner core and a top cover. The top cover is movably connected to the proximal end of the sheath body. The top cover has a through hole. The pressure inner core has a plurality of second pressure plates and a connecting post connected to the proximal end of the plurality of second pressure plates. The proximal end of the connecting post passes through the through hole.

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