Conveying device

Abstract

The invention is suitable for the field of interventional medical instruments, and discloses a conveying device. The conveying device comprises a sheath tube body, an inner shrinkage core and a top cover assembly. The inner shrinkage core is provided with a plurality of first pressing pieces, the first pressing pieces are arranged on the peripheral side of the sealing ring in a surrounding mode, and inclined tables are arranged on the outer sides of the first pressing pieces. The top cover assembly is movably connected to the near end of the sheathing canal main body and relatively moves in the axial direction of the sheathing canal main body; the top cover assembly is provided with a plurality of second pressing pieces, the second pressing pieces are located on the outer sides of the first pressing pieces, and the second pressing pieces are opposite to the inclined tables of the first pressing pieces in the axial direction of the sheathing canal body. According to the conveying device, the stability and reliability of the conveying device can be effectively improved, so that medical staff can perform surgical operation conveniently, and the surgical risk is reduced.

Description

Technical Field

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

[0002] In the field of interventional therapy, the delivery device is the passage for medical devices to enter the human body, and is an important component that bears whether the interventional medical device is accurate, minimally invasive, and safe.

[0003] In the prior art, in order to reduce the repeated access of the delivery device, the inside of 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 in the delivery device, the inner sheath core can pass through the sealing ring, and a certain sealing performance is provided by the sealing ring. When the inner sheath core is withdrawn, the sealing gasket will return to its initial shape to close the passage, achieving a self-sealing effect. Subsequently, 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 the medical device, the sealing ring may have problems of being too tight or too loose, resulting in low stability and reliability of the delivery device, making the surgical operation difficult and increasing the surgical risk. Summary of the Invention

[0005] The purpose of this application is to provide a delivery device, aiming to improve the stability and reliability of the delivery device.

[0006] To achieve the above purpose, this application provides a delivery device, including:

[0007] A sheath tube body, within which a sheath core channel is provided. 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] A retractable core, which is detachably installed at the proximal end of the sheath tube body and abuts against the sealing ring. The retractable core is provided with a first through hole axially arranged, and a plurality of first pressing pieces extending towards the distal end are arranged circumferentially on the retractable core. The plurality of first pressing pieces are installed or abut in the mounting groove and surround the circumferential side of the sealing ring. The free end of the distal side of the first pressing piece protrudes towards the outside to form a bevel;

[0009] The top cover assembly is detachably and movably connected to the proximal end of the sheath tube body and can move relative to the sheath tube body in the axial direction of the sheath tube body. The top cover assembly is located on the proximal side of the retractable core, and the top cover assembly is provided with a second perforation arranged axially; the top cover assembly includes a plurality of second pressing pieces arranged circumferentially and extending towards the distal end. The plurality of second pressing pieces are placed in the installation groove and are located outside the plurality of first pressing pieces. The plurality of second pressing pieces are opposite to the plurality of inclined platforms axially. When the second pressing pieces move axially towards the distal end, they can press and abut against the inclined platforms from the outside.

[0010] In the delivery device of the present application, the retractable core is provided with a plurality of ribs located inside the plurality of first pressing pieces. After the retractable core is installed, the plurality of ribs abut against the sealing ring.

[0011] In the delivery device of the present application, the sealing ring includes an installation portion and a sealing portion. The sealing portion is located in the middle of the installation portion. The sealing portion is provided with a cutting groove, and the sealing portion is separated by the cutting groove to form a plurality of cutting flaps. The inclined platform axially covers the area where the cutting flaps are located.

[0012] In the delivery device of the present application, the bottom of the installation groove is provided with a fixing groove, and the installation portion is embedded in the fixing groove.

[0013] In the delivery device of the present application, a plurality of card slots are distributed circumferentially at the proximal end of the retractable core. The card slots are arranged corresponding to the first pressing pieces. When the top cover assembly approaches the retractable core from the proximal end to the distal end, the second pressing pieces pass through the card slots and abut against the first pressing pieces from the outside to the inside.

[0014] In the delivery device of the present application, the inclined platform is provided with an inclined surface, and the inclined surface extends obliquely away from the sealing ring in the direction from the proximal end to the distal end of the sheath tube body.

[0015] In the delivery device of the present application, the inclined platform includes a plurality of stepped platforms. Along the direction from the proximal end to the distal end of the sheath tube body, the thickness of the plurality of stepped platforms gradually increases; the distal end of the second pressing piece is provided with a buckle facing the first pressing piece, and the buckle can selectively cooperate with one of the plurality of stepped platforms.

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

[0017] In the delivery device of the present application, the first connecting portion includes a clamping groove, the clamping groove includes a first axial groove and a first radial groove that communicate with each other, the first axial groove extends along the axial direction of the sheath body and opens at the end of 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, and 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 retractable core is fixed to the proximal end of the sheath body.

[0018] In the delivery device of the present application, the top cover assembly includes a pressing inner core and a top cover, the top cover is movably connected to the proximal side of the sheath body, the top cover is provided with a through hole, the pressing inner core is provided with a plurality of the second pressing pieces and a connecting column connected to the proximal side of the plurality of the second pressing pieces, and the proximal end of the connecting column penetrates through the through hole.

[0019] In the delivery device provided by the present application, for push devices of different specifications, when the push device is in the loading state, the top cover assembly can be moved to drive the plurality of second pressing pieces to move, and the plurality of second pressing pieces can squeeze the inclined platforms of the plurality of first pressing pieces, so as to control the circumferential compression degree of the sealing ring, thereby controlling the sealing performance of the inserted push member and controlling the resistance of the push member of the instrument. When the instrument is withdrawn, the cutting groove of the sealing ring rebounds to achieve sealing. Even if the rebound effect becomes poor, the sealing performance can be ensured by controlling the retractable core to tightly press the circumferential side of the sealing ring through the top cover assembly. The delivery device provided by the present application can ensure stable sealing performance when inserting push members of different specifications or withdrawing the push members, avoid blood leakage and oozing, and is also convenient for the insertion and movement of the instrument. Therefore, the stability and reliability of the delivery device can be effectively improved, which is convenient for medical staff to perform surgical operations and reduces surgical risks. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 is a schematic structural diagram of the delivery device provided by the embodiment of the present application;

[0022] Figure 2 is an exploded schematic diagram of the delivery device provided by the embodiment of the present application;

[0023] Figure 3It is one of the schematic diagrams of the internal structure of the conveying device provided by the embodiments of the present application;

[0024] Figure 4 It is the schematic diagram of the structure of the sealing ring of the conveying device provided by the embodiments of the present application;

[0025] Figure 5 It is one of the schematic diagrams of the structure of the retractable core of the conveying device provided by the embodiments of the present application;

[0026] Figure 6 It is Figure 2 The enlarged view of part A in

[0027] Figure 7 It is one of the schematic diagrams of the structure of the inner pressing core of the conveying device provided by the embodiments of the present application;

[0028] Figure 8 It is Figure 2 The enlarged view of part B in

[0029] Figure 9 It is the second schematic diagram of the internal structure of the conveying device provided by the embodiments of the present application;

[0030] Figure 10 It is the second schematic diagram of the structure of the retractable core of the conveying device provided by the embodiments of the present application;

[0031] Figure 11 It is the second schematic diagram of the structure of the inner pressing core of the conveying device provided by the embodiments of the present application.

[0032] Explanation of the reference numerals in the drawings:

[0033] 10: Sheath tube main body; 10a: Sheath core channel; 10b: Installation groove; 11: Clamping groove; 12: First thread structure;

[0034] 20: Sealing ring; 21: Sealing part; 211: Cutting groove; 212: Cutting flap; 22: Installation part; 221: Concave platform;

[0035] 30: Retractable core; 30a: First perforation; 31: First pressing piece; 32: Rib; 311: Inclined platform; 33: Installation protrusion;

[0036] 40: Top cover assembly;

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

[0038] 42: Top cover;

[0039] 43: Top end cover; 431: Connecting groove; 432: Positioning protrusion;

[0040] 50: Instrument. Detailed Implementation Modes

[0041] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be fully conveyed to those skilled in the art.

[0042] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or their combinations. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. 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 the text to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", etc. and other numerical terms used in the text do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

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

[0045] To more clearly describe the structure of the present application, the terms "proximal end" and "distal end" are defined herein as common terms in the field of interventional medicine. Specifically, the "distal end" refers to the end away from the operator during the surgical operation, the "proximal end" refers to the end close to the operator during the surgical operation, the "axial direction" refers to its length direction, and the "radial direction" refers to the direction perpendicular to the "axial direction".

[0046] During the surgical procedure, the doctor may need to repeatedly switch instruments from the access route of the human body. Since the specifications of different instruments are different, it is necessary to repeatedly switch different specifications of the delivery device. During this process, it may cause harm to the patient. For example, blood leakage may occur, affecting the smooth progress of the surgery. To this end, a special silicone sealing washer can be provided inside the delivery sheath of the delivery device, and the inside of the sealing washer is set in a closed but pre-cut and penetrated state. When loading the inner sheath core, the closed center of the sealing washer unfolds through the cutting shape to allow the inner sheath core to pass through and provides a certain degree of sealing; when the inner sheath core is withdrawn, due to the resilience of the silicone material itself, the sealing washer will rebound into its original closed shape at the moment of withdrawal, closing the passage, achieving a self-sealing effect. Subsequent other instruments can also enter the human body through this delivery device, reducing the repeated access of the delivery device.

[0047] It should be noted that the resistance when the inner sheath core or other instruments enter and move within the delivery device is entirely controlled by the sealing gasket. Due to the different specifications of the inner sheath core and other instruments, when the sealing gasket is wrapped too tightly, it will cause difficulties in the entry or movement of the inner sheath core and other instruments. Or, when the sealing gasket is wrapped too loosely, it will cause blood leakage. In addition, since the inner sheath core has been loaded in the sealing gasket when the delivery device is manufactured, the sealing gasket has been in an expanded state during this period, and the material of the sealing gasket may gradually age over time, resulting in a weakened resilience. This will cause the sealing gasket not to rebound in time after the inner sheath core is withdrawn, resulting in blood leakage. Therefore, the stability and reliability of the delivery device are low, the surgical operation is difficult, and the surgical risk is also increased.

[0048] Therefore, the embodiment of the present application provides a delivery device, which can effectively improve the stability and reliability of the delivery device, facilitate the surgical operation of medical staff, and reduce the surgical risk.

[0049] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0050] As Figures 1 to 3 shown, a delivery device 100 provided by an embodiment of the present application includes a sheath tube main body 10, a sealing ring 20, a retractable core 30, and a top cover assembly 40.

[0051] The sheath tube main body 10 includes a sheath core channel 10a, and an installation groove 10b communicating with the sheath core channel 10a is provided at the proximal end of the sheath tube main body 10. The sealing ring 20 is disposed in the installation groove 10b, and the sealing ring 20 includes a cutting groove 211 communicating with the sheath core channel 10a. The retractable core 30 is detachably installed at the proximal end of the sheath tube main body 10 and abuts against the sealing ring 20. The retractable core 30 is provided with a first through hole 30a, and the first through hole 30a communicates with the cutting groove 211 of the sealing ring 20, that is, the first through hole 30a is axially arranged. The retractable core 30 is provided with a plurality of first pressing pieces 31. The plurality of first pressing pieces 31 are installed or abutted in the installation groove 10b and surround the circumferential side of the sealing ring 20. The free end of the distal side of the first pressing piece 31 protrudes outward to form a bevel 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 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 relatively along the axial direction of the sheath body 10. The top cover assembly 40 is located on the side of the retractable 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 communicates with 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 a part of the sheath core channel 10a, or can be regarded as being used for the inner sheath core 50 to pass through under the combined action; the top cover assembly 40 is provided with a plurality of second pressing pieces 411. The plurality of second pressing pieces 411 are placed in the installation groove 10b and are located outside the plurality of first pressing pieces 31. The plurality of second pressing pieces 411 face the inclined platforms 311 of the plurality of first pressing pieces 31 along the axial direction of the sheath body 10. That is to say, the second pressing piece 411 can move axially to be pressed tightly so as to abut against and press the inclined platform 311.

[0053] In this embodiment, a plurality of card slots 30b are distributed circumferentially at the proximal end of the retractable core 30. The card slots 30b are arranged corresponding to the first pressing pieces 31. When the top cover assembly 40 approaches the retractable core 30 from the proximal end to the distal end, the second pressing pieces 411 pass through the card slots and abut against the first pressing pieces 31 from the outside to the inside. The card slots 30b play a role in limiting the relative rotation between the retractable core 30 and the top cover assembly 40, and make the second pressing pieces 411 be in the correct position facing the first pressing pieces axially.

[0054] In the conveying device 100 provided by the embodiment of the present application, the cutting groove 211 of the sealing ring 20 can be opened to allow the inner sheath core 50 to pass through. For different specifications of the inner sheath core 50, when the inner sheath core 50 is in the loaded state, the top cover assembly 40 can be moved to drive the plurality of second pressing pieces 411 to move. The plurality of second pressing pieces 411 can then squeeze the inclined platforms 311 of the plurality of first pressing pieces 31, so as to control the circumferential compression degree of the sealing ring 20, thereby controlling the sealing performance of the penetrated inner sheath core 50 and controlling the resistance of the inner sheath core 50 to move. When the inner sheath core 50 is withdrawn, the cutting groove 211 of the sealing ring 20 rebounds following the movement of the inner sheath core 50. Even if the rebound effect becomes poor, the sealing performance can be ensured by controlling the retractable core 30 to press the circumferential side of the sealing ring 20 through the top cover assembly 40. In the conveying device 100 provided by the present application, when penetrating different specifications (i.e., sizes) of the inner sheath core 50 or withdrawing the inner sheath core 50, stable sealing performance can be ensured, and the situation of blood leakage can be avoided. At the same time, since the sealing depends more on the action of the top cover assembly 40, it does not affect the penetration and movement of the inner sheath core 50. Therefore, the stability and reliability of the conveying device 100 can be effectively improved, which is convenient for medical staff to perform surgical operations and reduces the surgical risk.

[0055] It should be noted that the quantities of the first pressing piece 31 and the second pressing pieces 411 are not limited, as long as it can ensure that multiple second pressing pieces 411 can extrude towards the circumferential side of the sealing ring 20 through the inclined platforms 311 of the multiple first pressing pieces 31. For example, four first pressing pieces 31 and four second pressing pieces 411 are provided respectively.

[0056] In the embodiment of the present application, the inner sheath core 50 can be directly used to convey other medical devices or be replaced by other conveying members simultaneously, that is, this embodiment can be applied to the conveying stage of other medical devices such as valves, occluders, etc. This is because the inner retracting core 30 and the top cover assembly 40 in this embodiment are both detachable and replaceable. In addition, not only can it meet the requirements of different implants, but the replacement of the inner retracting core 30 and the top cover assembly 40 (or the top cover assembly 40 alone) can also meet the expected sealing effects at different stages, such as taking into account the puncture stage and the conveying, releasing, and retrieving stages.

[0057] It should be noted 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 will pass through and expand the cutting groove 211. Generally speaking, the resilience of the sealing ring 20 itself can make the cutting groove 211 squeeze against the circumferential side of the inner sheath core 50. After the inner sheath core 50 is withdrawn, the sealing ring 20 can rebound and close to ensure a certain sealing performance. In the present application, the inner retracting core 30 is further controlled in combination with the top cover assembly 40 to further compress the circumferential side of the sealing ring 20 to further ensure the sealing performance. Among them, the style of the cutting groove 211 is not limited. It can be a cross-cutting groove or a linear cutting groove, as long as it can ensure that after the inner sheath core 50 is withdrawn, the cutting groove 211 can rebound and close to achieve sealing.

[0058] Such as Figures 2 to 4As shown in the figure, in the embodiment of the present application, the sealing ring 20 includes an installation part 22 and a sealing part 21. The sealing part 21 is located in the middle of the installation part 22. A cutting groove 211 is provided in the sealing part 21. The sealing part 21 is separated by the cutting groove 211 to form a plurality of cutting flaps 212. The inclined platform 311 is arranged relative to the cutting flaps 212, that is, the inclined platform 311 axially covers the area where the cutting flaps 212 are located. That is to say, when the cutting flaps 212 are projected onto the surface of the inclined platform 311 along the radial direction, the projection of the cutting flaps 212 is completely covered by the inclined platform 311, so that when the inclined platform 311 moves along the radial direction, it drives the cutting flaps 212 to deform. The installation part 22 is used to stably install the sealing ring 20, and the sealing part 21 realizes the sealing of the sheath core channel 10a. When loading the inner sheath core 50, the inner sheath core 50 presses the plurality of cutting flaps 212, causing the plurality of cutting flaps 212 to undergo elastic deformation. The inner sheath core 50 passes through the sealing ring 20, and the plurality of cutting flaps 212 will press against the circumferential side of the inner sheath core 50. When the conveying device 100 does not pass through the inner sheath core 50 or the inner sheath core 50 is withdrawn, the plurality of cutting flaps 212 are pieced together to form a whole and closed to seal the conveying channel, ensuring that the conveying device 100 has a certain sealing performance in any state. In this embodiment, the inclined platform 311 axially covers the area where the cutting flaps 212 are located, so that when the inclined platform 311 moves along the radial direction, it drives the cutting flaps 212 to deform. When the inclined platform 311 is pressed by the top cover assembly 40, the inner retracting core 30 will press the middle position of the sealing ring 20 where the cutting flaps 212 are located. In this way, it is possible to control the plurality of cutting flaps 212 to press tightly towards the middle of the sealing part 21, and the cutting groove 211 will not be opened due to the extrusion, ensuring that while being convenient for operation and adjustment, the sealing performance of the conveying device 100 is increased.

[0059] Exemplarily, the cutting groove 211 is a cross-cutting groove. The sealing part 21 is separated by the cutting groove 211 to form four cutting flaps 212. Four first pressing pieces 31 are provided. The inclined platforms 311 of the four first pressing pieces 31 are respectively arranged relative to the four cutting flaps 212. The inclined platform 311 and the tangent of the cutting groove 211 form an angle of 22.5° in the circumferential direction. In this way, when the inclined platform 311 is pressed by the top cover assembly 40, the four first pressing pieces 31 can exactly press the two intersecting dividing lines divided by the cutting groove 211, greatly increasing the sealing performance of the conveying device 100 while being convenient for operation and adjustment, and reducing 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 separated by the cutting groove 211 to form three cutting flaps 212. Three first pressing pieces 31 are correspondingly provided. The inclined platforms 311 of the three first pressing pieces 31 are respectively arranged relative to the three cutting flaps 212. The inclined platform 311 and the tangent of the cutting groove 211 form an angle of 60° in the circumferential direction.

[0060] Exemplarily, the material of the sealing part 21 is silica gel to ensure that it has better resilience and will not cause harm to the human body.

[0061] Exemplarily, the sealing portion 21 is located in the middle of the mounting portion 22 in 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 portion 22 first increases and then decreases. In this way, it is convenient for the inner sheath core 50 to pass through the sealing portion 21, and the mounting portion 22 will not affect the passing of the inner sheath core 50.

[0062] As Figures 3 to 5 shown, in the embodiment of the present application, the retracting core 30 is provided with a plurality of ribs 32 located inside a plurality of first pressing pieces 31. After the retracting core 30 is installed, the plurality of ribs 32 abut against the sealing ring 20. Specifically, on the side wall of the sealing ring 20, that is, on the mounting portion 22, there are a plurality of concave platforms 221, and the plurality of ribs 32 respectively abut against the plurality of concave platforms 221. Since the retracting core 30 is fixed to the proximal end of the sheath body 10, by the plurality of ribs 32 respectively abutting against the plurality of concave platforms 221, the relative positions of the sealing ring 20 and the retracting core 30 can be ensured, and the sealing ring 20 is prevented from rotating relative to the retracting core 30. In this way, the stable extrusion of the sealing ring 20 by the inclined platform 311 can be ensured. Moreover, by the plurality of ribs 32 respectively abutting against the plurality of concave platforms 221, the sealing ring 20 can also be tightened, so that the sealing ring 20 is stably installed in the installation groove 10b.

[0063] As Figures 3 to 5 shown, in the embodiment of the present application, the plurality of concave platforms 221 are located in the extending direction of the tangent line of the cutting groove 211. Since the ribs 32 abut against the concave platforms 221 in the axial direction, by arranging the concave platforms 221 in the extending direction of the tangent line of the cutting groove 211, the ribs 32 will abut against the extending direction of the tangent line. In this way, the sealing ring 20 can be stably abutted without affecting the opening and closing of the cutting groove 211. In addition, in combination with the aforementioned inclined platform 311 being arranged relative to the cutting flap, it is possible to avoid the influence of the abutment of the ribs 32 on the pressing effect of the first pressing piece 31 on the sealing ring 20. The fixing and pressing of the sealing ring 20 do not affect each other, which is also beneficial to the control of the sealing ring 20 by the top cover assembly 40, so as to ensure that while being convenient for operation and adjustable, the sealing performance of the conveying device 100 is increased.

[0064] Exemplarily, both the concave platforms 221 and the ribs 32 are provided with four, and the four ribs 32 respectively abut against the four concave platforms 221. The cutting groove 211 is a cross-cutting groove 211, and the four concave platforms 221 are located in the extending direction of the tangent line of the cutting groove 211. Four first pressing pieces 31 are provided, and the inclined platforms 311 of the four first pressing pieces 31 are respectively arranged relative to the four cutting flaps 212.

[0065] As Figure 3As shown, in the embodiment of the present application, a fixing groove is provided at the bottom of the installation groove 10b, and the installation portion 22 is embedded in the fixing groove. By embedding the installation portion 22 in the fixing groove and combining with the abutment of the retracting core 30, it can be ensured that the sealing ring 20 is 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 on the conveying device 100.

[0066] As Figure 3 and Figure 5 shown, in the embodiment of the present application, the inclined table 311 is provided with an inclined surface, and the inclined surface extends obliquely away from the sealing ring 20 (outer direction) from the proximal end to the distal end of the sheath body 10. When the top cover assembly 40 moves axially along the sheath body 10 towards the proximal end of the sheath body 10, the second pressing piece 411 will squeeze the inclined table 311 of the first pressing piece 31 and abut against the inclined surface of the inclined table 311. Since the inclined surface extends obliquely away from the sealing ring 20 from the proximal end to the distal end of the sheath body 10, the distal end of the second pressing piece 411 will gradually squeeze the inclined surface, and make the pressing degree of the first pressing piece 31 towards the sealing ring 20 gradually increase. Thus, by controlling the movement of the top cover assembly 40, the circumferential pressing degree of the sealing ring 20 can be precisely controlled through the retracting core 30, so as to control the sealing performance of the penetrated inner sheath core 50 and the resistance of the inner sheath core 50 to move, so as to adapt to different specifications of the inner sheath core 50. Improve the stability and reliability of the conveying device 100, facilitate the operation of medical staff, and reduce the surgical risk.

[0067] As Figures 9 to 11As shown, in another embodiment of the present application, the inclined platform 311 includes a plurality of stepped platforms. Along the direction from the proximal end to the distal end of the sheath tube body 10, the thickness of the plurality of stepped platforms gradually increases. The distal end of the second pressing piece 411 is provided with a buckle 4111 facing the first pressing piece 31, and the buckle 4111 faces the plurality of stepped platforms along the axial direction of the sheath tube body 10. When the top cover assembly 40 moves axially along the sheath tube body 10 towards the proximal end of the sheath tube body 10, the buckle 4111 of the second pressing piece 411 will squeeze the inclined platform 311 of the first pressing piece 31 and sequentially abut against the inclined platform 311 with gradually increasing thickness, so that the pressing degree of the first pressing piece 31 towards the sealing ring 20 can change. In this way, by controlling the movement of the top cover assembly 40, the circumferential pressing degree of the sealing ring 20 can be precisely controlled by the retractable core 30, thereby controlling the sealing performance of the inserted inner sheath core 50 and controlling the resistance of the inner sheath core 50 to move, so as to adapt to different specifications of the inner sheath core 50. In addition, during the process of squeezing the inclined platform 311 by the buckle 4111, the buckle 4111 can sequentially buckle the stepped platforms. At this time, feedback can be transmitted to the operator, the operation feel is better, and feedback can be given in a timely manner, making the surgical operation more convenient. It should be noted that for this embodiment, the retractable core 30 with stepped platforms can be used as a replacement part, so that it has a larger adjustable range compared to the retractable core 30 in the previous embodiment, and the operator can make a choice according to the actual situation.

[0068] Exemplarily, both sides of each stepped platform along the axial direction of the sheath tube body 10 are inclined surfaces. In this way, when the buckle 4111 of the second pressing piece 411 squeezes each stepped platform, the degree of squeezing will gradually change, making the control more precise. The setting of the inclined surfaces also makes the operation smoother. Moreover, when the buckle 4111 buckles the stepped platforms, the feedback is clearer.

[0069] Exemplarily, both sides of the buckle 4111 along the axial direction of the sheath tube body 10 are inclined surfaces, so that it is convenient to squeeze the inclined platform 311 by the buckle 4111, and the situation of jamming will not occur when tightening or loosening the sealing ring 20.

[0070] Exemplarily, the inclined platform 311 includes three stepped platforms, and the buckle 4111 can sequentially buckle the three stepped platforms, giving the operator three progressive transmission feedbacks.

[0071] Such as Figure 3 、 Figure 5 and Figure 6As shown in the figure, in the embodiment of the present application, a clamping groove 11 is provided at the proximal end of the sheath tube body 10, and the retractable core 30 is provided with a mounting protrusion 33. The mounting protrusion 33 is fixed in the clamping groove 11 so that the retractable core 30 is fixed to the proximal end of the sheath tube body 10. By fixing the mounting protrusion 33 in the clamping groove 11, the retractable core 30 can be fixed to the proximal end of the sheath tube body 10, and the sealing ring 20 can be further stably fixed, ensuring the stable and reliable operation of the delivery device 100. Moreover, the retractable core 30 can be detached from the sheath tube body 10 as needed to replace the sealing ring 20 and the retractable core 30 of other specifications, so as to further adapt to more inner sheath cores 50 to meet the surgical requirements and ensure the stability of the delivery device 100 during the operation. For example, the sealing ring 20 and the retractable core 30 can be replaced as needed to adapt to inner sheath cores of different specifications.

[0072] Specifically, as Figure 3 , Figure 5 and Figure 6 shown in the figure, in this embodiment, the clamping groove 11 includes a first axial groove and a first radial groove that are connected and communicate with each other. The first axial groove extends along the axial direction of the sheath tube body 10 and opens at the end of the proximal end of the sheath tube body 10. The first radial groove extends along the radial direction of the sheath tube 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 tube body 10 to the end of the first radial groove, so that the retractable core 30 is fixed to the proximal end of the sheath tube body 10. In this embodiment, the clamping groove 11 is an L-shaped groove. When the retractable core 30 is installed at the proximal end of the sheath tube body 10, the mounting protrusion 33 can enter the first axial groove from the opening of the first axial groove, and then the retractable core 30 is moved axially until the mounting protrusion 33 moves to the first radial groove, and then the retractable core 30 is rotated radially so that the mounting protrusion 33 is caught by the first radial groove, thereby preventing the retractable core 30 from axially detaching from the sheath tube body 10. Moreover, it should be noted that after the retractable core 30 is installed, its rib 32 just abuts against the concave platform of the sealing ring 20. When it is necessary to detach the retractable core 30 from the sheath tube body 10, reverse operation can be performed.

[0073] In another embodiment, the mounting protrusion can also be provided inside the sheath tube body 10, and the clamping groove is provided on the retractable core 30. That is to say, the proximal end of the sheath tube body 10 includes a first connecting portion, and the retractable core 30 includes a second connecting portion. The first connecting portion and the second connecting portion are detachably connected.

[0074] Exemplarily, the retractable core 30 is provided with four mounting protrusions 33 to correspond to the four clamping grooves 11 of the sheath body 10. When the clamping groove 11 is an L-shaped groove, the extension direction of the first radial grooves of the four clamping grooves 11 is consistent, so as to facilitate the disassembly and assembly of the retractable core 30. In addition, the four mounting protrusions 33 can also ensure the stable installation of the retractable core 30. Further, the retractable core 30 is provided with four first pressing sheets 31 and four convex ribs 32. The four mounting protrusions 33 are opposite to the four convex ribs 32 and are located between the four first pressing sheets 31 to avoid the second pressing sheet 411 from squeezing the first pressing sheet 31 due to the mounting protrusions 33.

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

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

[0077] like Figure 3 , Figure 7 and Figure 8 As shown, in the embodiment of the present application, the top cover assembly 40 includes a compression 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, the top cover 42 is provided with a through hole, the compression inner core 41 is provided with a plurality of second compression sheets 411, the compression inner core 41 is provided with a connecting column 412, the connecting column 412 is passed through the through hole, and the top cover 43 is fixedly connected to the connecting column 412 and is located at the proximal side of the top cover 42. The top cover 42 is located between the compression inner core 41 and the top cover 43, so that when the top cover 43 moves, it can press against the compression inner core 41 to drive the compression inner core 41 to move, so as to tighten the sealing ring 20 through the shrinking core 30, or the top cover 42 can also press against the top cover 43 to drive the compression inner core 41 to move, so as to loosen the sealing ring 20 through the shrinking core 30. In this way, the top cover 42 can be moved relative to the sheath body 10 to drive the compression core 41 to move, thereby driving the second compression plate 411 to squeeze the first compression plate 31 to tighten or loosen the sealing ring 20. Such a structure is easy to assemble and ensures the reliability of the finished product after assembly. For example, when assembling the top cover assembly 40, the compression core 41 can be first assembled at the distal end of the sheath body 10 so that it can cooperate with the shrinking core 30, and then the top cover 42 is sleeved on the connecting column 412 and connected to the distal end of the sheath body 10, and finally, the top cover 43 is fixed to the connecting column 412.

[0078] Exemplarily, a second through hole 41 a is formed in the inner core 41 to facilitate the inner sheath core 50 to penetrate into the delivery device 100 .

[0079] Exemplarily, connection protrusions 4121 are provided on the circumferential side of the connection post 412, and a connection groove 431 is provided on the top end cap 43. The connection groove 431 includes a second axial groove and a second radial groove. The second axial groove extends along the axial direction of the top end cap 43 and opens at the end of the distal end of the top end cap 43. The second radial groove extends along the radial direction of the top end cap 43. When installing the top end cap 43, the top end cap 43 is sleeved on the connection post 412, and the connection protrusion 4121 is placed at the opening of the second axial groove. The top end cap 43 is moved axially so that the connection protrusion 4121 enters the second radial groove. By radially rotating the top end cap 43, the connection protrusion 4121 is caught by the second radial groove, thereby completing the fixation of the top end cap 43. Further, two connection protrusions 4121 are provided on the circumferential side of the connection post 412. Correspondingly, two connection grooves 431 are provided on the top end cap 43. The two connection protrusions 4121 can be respectively placed in the two connection grooves 431 to stably fix the top end cap 43 on the inner pressing core 41. Further, a clamping protrusion 432 is provided at the inner part of the second radial groove. When the connection protrusion 4121 is placed at the bottom end of the second radial groove, the clamping protrusion 432 can limit the movement of the connection protrusion 4121 in the direction of the second axial groove, thereby restricting the rotation of the top end cap 43 and ensuring that the top end cap 43 is stably fixed on the inner pressing core 41.

[0080] Exemplarily, the outer circumferences of the plurality of second pressing pieces 411 are adapted to the installation groove 10b. In this way, the second pressing pieces 411 can be restricted from shifting outwards when squeezing the extrusion inclined platform 311 through the installation groove 10b, ensuring stable control of the sealing ring 20.

[0081] As Figure 2 、 Figure 3 and Figure 6 As shown in

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

[0083] As Figure 1 and Figure 3As shown, in the embodiment of the present application, the distance between the root of the top cover 43 and the connecting column 412 is greater than the length of the through hole. That is to say, the distance between the top cover 43 and the table surface of the pressing inner core 41 is greater than the thickness of the screw cap. In this way, whether the top cover 42 is moved in the proximal direction or the distal direction of the sheath tube body 10, there is a certain reserved space for the movement of the top cover 42, so as to avoid affecting the sealing performance of the sealing ring 20 due to accidental contact with the top cover 42. Of course, in other embodiments, the distance between the root of the top cover 43 and the connecting column 412 can also be the same as the length of the through hole, so that the overall structure of the top cover assembly 40 is stable and reliable.

[0084] In some other embodiments, the top cover assembly 40 can also be integrally formed. And, in order to realize the movement of the top cover assembly 40 relative to the sheath tube body 10, a sliding groove can be provided on the circumferential side of the sheath tube body 10, and a sliding block can be provided on the inner side of the top cover assembly 40. The sliding block is placed in the sliding groove to slide, so as to realize the axial movement of the top cover assembly 40 relative to the sheath tube body 10. Furthermore, the first pressing piece 31 can be extruded by the movement of the second pressing piece 411 to control the tightening and relaxation of the sealing ring 20.

[0085] As Figures 1 to 3 shown, the present application also provides a conveying device 100, including the conveying device 100 as described in any one of the above.

[0086] In the conveying device 100 provided by the embodiment of the present application, when threading different specifications of the inner sheath core 50 or withdrawing the inner sheath core 50, stable sealing performance can be ensured, avoiding the occurrence of blood leakage, and at the same time, it is also convenient for the threading and movement of the inner sheath core 50. Therefore, the stability and reliability of the conveying device 100 can be effectively improved, facilitating the operation of medical staff during the operation and reducing the surgical risk.

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

[0088] In the embodiment of the present application, the conveying device 100 further includes an inner sheath core 50 threaded through the first through hole 30a, the second through hole 41a, the cutting groove 211, and the sheath core channel 10a. The inner sheath core 50 includes but is not limited to the inner sheath core and other medical devices.

[0089] During the use of the conveying device 100 of the present application, when loading the inner sheath core, the top cover assembly 40 can be moved to drive the movement of a plurality of second pressing pieces 411. The plurality of second pressing pieces 411 control the circumferential compression degree of the sealing ring 20 by squeezing the inclined platforms 311 of the plurality of first pressing pieces 31, thereby ensuring the sealing performance of the sealing ring 20 for the conveying channel. When withdrawing the inner sheath core, in order to facilitate the movement of the inner sheath core, the top cover assembly 40 can be moved away from the sheath tube body 10 to reduce the squeezing degree of the second pressing piece 411 on the inclined platform 311, thereby reducing the resistance of the inner sheath core movement and facilitating the withdrawal of the inner sheath core. After the inner sheath core is withdrawn and no other medical devices are loaded, the top cover assembly 40 can be moved to increase the squeezing degree of the second pressing piece 411 on the inclined platform 311, and the circumferential side of the sealing ring 20 is pressed by the first pressing piece 31 to ensure the sealing performance. 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 conveying channel.

[0090] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the application concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A conveying device, characterized in that, Comprising: A sheath tube body, within which there is a sheath core channel. 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. A sealing ring is loaded within the mounting groove. A retractable core, which is detachably mounted at the proximal end of the sheath tube body and abuts against the sealing ring. The retractable core is provided with a first through-hole arranged axially. The retractable core is provided with a plurality of first pressing pieces extending towards the distal end circumferentially. The plurality of first pressing pieces are installed or abut within the mounting groove and surround the circumferential side of the sealing ring. The free end on the distal side of the first pressing piece protrudes towards the outside to form a bevel. A top cover assembly, which is detachably and movably connected to the proximal end of the sheath tube body and can move relative to the sheath tube body along the axial direction of the sheath tube body. The top cover assembly is located on the proximal side of the retractable core. The top cover assembly is provided with a second through-hole arranged axially. The top cover assembly includes a plurality of second pressing pieces extending towards the distal end circumferentially. The plurality of second pressing pieces are placed within the mounting groove and are located outside the plurality of first pressing pieces. The plurality of second pressing pieces are opposite to the plurality of bevels axially. When the second pressing pieces move axially towards the distal end, they can press and abut against the bevels from the outside.

2. The conveying device according to claim 1, characterized in that, The retractable core is provided with a plurality of ribs located inside the plurality of first pressing pieces. After the retractable core is installed, the plurality of ribs abut against the sealing ring.

3. The conveying device according to claim 2, characterized in that, The sealing ring includes a mounting portion and a sealing portion. The sealing portion is located in the middle of the mounting portion. The sealing portion is provided with a cutting groove. The sealing portion is separated by the cutting groove to form a plurality of cutting flaps. The bevel axially covers the area where the cutting flaps are located.

4. The conveying device according to claim 3, characterized in that The bottom of the mounting groove is provided with a fixing groove, and the mounting portion is embedded in the fixing groove.

5. The conveying device according to claim 1, characterized in that, A plurality of clamping grooves are distributed circumferentially at the proximal end of the retractable core. The clamping grooves are arranged corresponding to the first pressing pieces. When the top cover assembly approaches the retractable core from the proximal end to the distal end, the second pressing pieces pass through the clamping grooves and abut against the first pressing pieces from the outside to the inside.

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

7. The conveying device according to any one of claims 1 to 5, characterized in that The bevel includes a plurality of stepped platforms. Along the direction from the proximal end to the distal end of the sheath tube body, the thickness of the plurality of stepped platforms gradually increases. The distal end of the second pressing piece is provided with a buckle facing the first pressing piece, and the buckle can selectively cooperate with one of the plurality of stepped platforms.

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

9. The conveying device according to claim 8, wherein The first connecting portion includes a clamping groove, the clamping groove includes a first axial groove and a first radial groove that communicate with each other. The first axial groove extends along the axial direction of the sheath body and opens at the end of 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. 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 retracted 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 pressing inner core and a top cover. The top cover is movably connected to the proximal side of the sheath body. The top cover is provided with a through hole. The pressing inner core is provided with a plurality of the second pressing pieces and a connecting column connected to the proximal sides of the plurality of the second pressing pieces. The proximal end of the connecting column passes through the through hole.

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