Locking assembly and sheathing canal device

Abstract

The utility model is suitable for the technical field of medical instruments, and provides a locking assembly and a sheathing canal device, and the locking assembly comprises a connecting cap, a catheter sheath joint and an expansion sheath joint. A mounting groove is formed in one side of the connecting cap in the first direction, the mounting groove is provided with a bottom wall opposite to an opening of the mounting groove, a via hole is formed in the bottom wall in the first direction in a penetrating mode, an avoiding groove is formed in the inner wall of the via hole in the first direction in a penetrating mode, and a first clamping part is formed. The catheter sheath joint is mounted in the mounting groove through the opening of the mounting groove. A connecting part is arranged on one side of the expansion sheath connector in the first direction, a second clamping part and a limiting protrusion are arranged on the peripheral face, parallel to the first direction, in the connecting part, and the connecting part is inserted into the mounting groove through the via hole. In the locking or unlocking process of the locking assembly, the maximum rotating angle needed by the connecting part is smaller than 360 degrees, twisting force borne by the blood vessel is effectively reduced, and the risk that the blood vessel is damaged is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to a locking assembly and a sheath device. Background Art

[0002] With the development of modern medicine, percutaneous interventional surgery has been increasingly widely used in clinical practice at home and abroad. During percutaneous interventional surgery, a surgical channel needs to be established. In the process of establishing the surgical channel, a small opening needs to be made on the human blood vessel with a puncture needle, and then a guide wire is inserted into the human blood vessel through the inner cavity of the puncture needle. The puncture needle is then removed, and then the expander assembly is used to pass through the hemostatic valve of the outer sheath tube body connector to enter the outer sheath inner cavity. The expander assembly is rotated so that the expander assembly is locked with the outer tube body assembly. The expansion sheath in the expander assembly is sent into the human blood vessel through the guide wire, and the catheter sheath is driven to the predetermined position by the expansion sheath. The catheter sheath is then fixed and the expander assembly is withdrawn. At this time, the surgical channel of the vascular intervention device is established.

[0003] At present, the expander assembly and the outer sheath tube body assembly are usually locked by a rotating thread structure or a straight plug interference fit structure. When the rotating thread structure is used for locking, the expander assembly usually needs to be rotated at least one circle (360°) relative to the outer sheath tube body assembly to lock the expander assembly and the outer sheath tube body assembly. When the expander assembly and the outer sheath tube body assembly are unlocked, the expander assembly also needs to be rotated at least one circle relative to the outer sheath tube body assembly. In this way, the blood vessel is subjected to a huge twisting force, which is very easy to damage the blood vessel. When the straight plug interference fit structure is used for locking, the expansion sheath connector in the expander assembly and the outer sheath tube body connector in the outer sheath tube body assembly are plugged into each other to lock the expander assembly and the outer sheath tube body assembly. When the expander assembly and the outer sheath tube body assembly are unlocked, the expansion sheath connector needs to be pulled out of the outer sheath tube body connector. When the expansion sheath connector is inserted into or pulled out of the outer sheath tube body connector, a large force is required to achieve the plugging and unplugging of the expansion sheath connector and the outer sheath tube body connector. In this way, not only the outer sheath tube body assembly is easily damaged, but also the blood vessel is easily damaged.

[0004] In summary, the current structure for locking the dilator assembly and the outer sheath assembly is prone to damage blood vessels. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a locking assembly and a sheath device, aiming to solve the technical problem in the prior art that the structure for locking the dilator assembly and the outer sheath body assembly is prone to damage blood vessels.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in this application is to provide a locking assembly, comprising:

[0007] The connecting cap has a mounting groove formed on one side in the first direction, the mounting groove having a bottom wall opposite to the opening thereof, the bottom wall being penetrated by a through hole along the first direction, an avoidance groove being formed on an inner wall of the through hole, and a first clamping portion being formed;

[0008] a catheter sheath connector, mounted in the mounting slot through an opening of the mounting slot;

[0009] An expansion sheath connector is provided with a connecting portion on one side in the first direction, and a second clamping portion and a limiting protrusion are provided on the outer peripheral surface of the connecting portion parallel to the first direction. The connecting portion is inserted into the mounting groove via the through hole, and the limiting protrusion can move with the connecting portion and pass through the avoidance groove; the connecting portion can rotate around the axis of the through hole relative to the catheter sheath connector to clamp the first clamping portion and the second clamping portion, and to limit the axial position of the limiting protrusion relative to the connecting cap in the through hole.

[0010] In one possible design, there are multiple first clamping portions, and the multiple first clamping portions are evenly spaced around the axis of the through hole on the inner wall of the through hole, and each first clamping portion is spaced from the avoidance groove around the circumference of the through hole;

[0011] There are also multiple second clamping portions, which are equal in number to the first clamping portions. The multiple second clamping portions are evenly spaced around the axis of the through hole and arranged on the outer peripheral surface of the connecting portion.

[0012] In one possible design, the inner wall of the via hole has a gradient zone, which is located between the avoidance groove and the first clamping portion, and the inner diameter of the gradient zone gradually decreases from a side close to the avoidance groove to a side close to the first clamping portion.

[0013] In a possible design, the bottom wall includes an elastic region, and the elastic region is located on a side of the gradual change region away from the via hole.

[0014] In a possible design, a through hole is provided through the elastic region along the first direction.

[0015] In one possible design, a guide groove is further provided on the inner wall of the through hole, and the guide groove extends around the circumference of the through hole, and one end of the guide groove in the circumferential direction of the through hole is connected with the avoidance groove, and the limiting protrusion can rotate around the axis of the through hole along with the connecting part and extend into the guide groove from the avoidance groove; the guide groove has a limiting surface at the other end in the circumferential direction of the through hole for contacting the limiting protrusion, and the limiting surface is used to contact the limiting protrusion when the first clamping part and the second clamping part are clamped.

[0016] In a possible design, the locking assembly further includes a hemostatic sealing ring, which is installed in the catheter sheath connector. The hemostatic sealing ring is provided with a slit, and the slit is used for the expansion sheath to pass through.

[0017] In a possible design, one side of the hemostatic sealing ring in the first direction is a hemispherical concave surface and the other side is a plane, and the slit extends from the hemispherical concave surface toward the direction close to the plane; the number of the hemostatic sealing rings is two, and the two hemostatic sealing rings are arranged to be in contact with one side of the plane.

[0018] In a possible design, the slits on the hemispherical concave surfaces of the two hemostatic sealing rings are arranged at an angle.

[0019] The present application also provides a sheath device, comprising a catheter sheath, an expansion sheath and a locking assembly provided by any of the above technical solutions, wherein the catheter sheath is installed in the mounting groove, the expansion sheath is connected to the connecting part, and the expansion sheath is passed through the through hole, the mounting groove and the inner hole of the catheter sheath.

[0020] The locking assembly provided by the present application has the following beneficial effects: compared with the prior art, the locking assembly of the present application is used to lock and unlock the catheter sheath and the dilator sheath, the catheter sheath connector is used to install the catheter sheath, and the dilator sheath connector is used to install the dilator sheath. During the locking process, it is only necessary to extend the connecting portion into the installation groove through the through hole, the limiting protrusion moves along with the connecting portion and passes through the avoidance groove, and then the connecting portion is rotated around the axis of the hole by a certain angle so that the limiting protrusion is positioned at the upper limit of the axial direction of the through hole relative to the connecting cap; because the first clamping portion is arranged on the inner wall of the through hole and the second clamping portion is arranged on the outer circumferential surface of the connecting portion, the maximum rotation angle of the connecting portion after passing through the through hole is less than one circle (i.e., less than 360 degrees), so that the first clamping portion and the second clamping portion can be mutually clamped, and through the cooperation of the first clamping portion and the second clamping portion, the dilator sheath connector and the catheter sheath connector are limited in the circumferential direction of the through hole, thereby achieving locking between the dilator sheath connector and the catheter sheath connector, that is, locking the catheter sheath and the dilator sheath. During the unlocking process, the connecting part only needs to be rotated around the axis of the hole in the opposite direction to the same angle as in the locking process to unlock the expansion sheath connector and the catheter sheath connector, that is, the catheter sheath and the expansion sheath are unlocked.

[0021] From the above, it can be seen that during the locking or unlocking process of the locking assembly provided in the present application, the maximum angle of rotation required for the connecting part is less than 360 degrees. In this way, the twisting force applied to the blood vessels can be effectively reduced, the blood vessels can be better protected, and the risk of blood vessel damage can be reduced.

[0022] The beneficial effects of the sheath device provided in the present application are: compared with the prior art, the sheath device of the present application, since it includes the locking assembly provided by any of the above technical solutions, has at least all the above beneficial effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic structural diagram of a locking assembly provided by an embodiment of the present application from one perspective;

[0025] Figure 2 1 is an exploded schematic diagram of parts of a locking assembly provided by one embodiment of the present application;

[0026] Figure 3 is a schematic cross-sectional structural diagram of a sheath device provided in one embodiment of the present application;

[0027] Figure 4 This is a schematic structural diagram of an expansion sheath connector and a connecting portion in a locking assembly provided by one embodiment of the present application;

[0028] Figure 5 This is a schematic structural diagram from one perspective of a connecting cap in a locking assembly provided by an embodiment of the present application;

[0029] Figure 6 An embodiment of the present application provides a sheath device along Figure 3 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0030] Figure 7 This is a schematic structural diagram from another perspective of a connecting cap in a locking assembly provided by an embodiment of the present application;

[0031] Figure 8 This is another structural schematic diagram of the connecting cap in the locking assembly provided by an embodiment of the present application from another perspective.

[0032] The reference numerals used in the above drawings are as follows:

[0033] 10. Locking assembly; 20. Dilation sheath; 30. Catheter sheath; 40. Extension tube;

[0034] 100, expansion sheath connector; 110, connecting portion; 111, limiting protrusion; 112, second clamping portion; 113, second installation channel;

[0035] 200, connecting cap; 210, mounting groove; 211, bottom wall; 220, through hole; 221, avoidance groove; 222, first clamping portion; 230, gradient zone; 240, elastic section; 241, through hole; 250, guide groove; 251, limiting surface;

[0036] 300, catheter sheath connector; 310, first installation channel; 320, third installation channel;

[0037] 400, hemostatic sealing ring; 410, hemispherical concave surface; 420, slit;

[0038] 500. Sealing cover. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0043] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0044] Example 1

[0045] like Figures 1 to 5As shown, an embodiment of the present application provides a locking assembly 10, comprising a connecting cap 200, a catheter sheath connector 300, and a dilator sheath connector 100. The connecting cap 200 has a mounting slot 210 on one side in a first direction. The mounting slot 210 has a bottom wall 211 opposite to its opening. The bottom wall 211 is penetrated by a through hole 220 along the first direction. The inner wall of the through hole 220 is provided with an avoidance groove 221 and a first clamping portion 222. The catheter sheath connector 300 is mounted in the mounting slot 210 through the opening of the mounting slot 210. The inner wall of the mounting slot 210 and the catheter sheath connector 300 can be connected by any means such as threaded connection, clamping connection, or plug-in connection. The dilation sheath connector 100 is provided with a connecting portion 110 on one side in the first direction. A second engaging portion 112 and a limiting protrusion 111 are provided on the outer circumference of the connecting portion 110 parallel to the first direction. The connecting portion 110 is inserted into the mounting groove 210 via the through hole 220. The limiting protrusion 111 can move with the connecting portion 110 and pass through the avoidance groove 221. The connecting portion 110 can rotate relative to the catheter sheath connector 300 around the axis of the hole 220 so that the first engaging portion 222 and the second engaging portion 112 engage, and the limiting protrusion 111 is positioned at the upper limit axial direction of the through hole 220 relative to the connecting cap 200.

[0046] In the embodiments of the present application, the first direction can be a horizontal direction, a vertical direction, or any other direction, and is not limited to this. In the various drawings of the embodiments of the present application, the first direction is shown as the direction indicated by the arrow AA. In the various drawings of the embodiments of the present application, the circumferential direction of the via 220 is shown as the direction indicated by the arrow RR.

[0047] It can be understood that the mounting groove 210 is opened on the first side surface of the connecting cap 200 in the first direction, and the mounting groove 210 forms an opening on the first side surface of the connecting cap 200. In the first direction, the side wall of the mounting groove 210 opposite to its own opening is the bottom wall 211 of the mounting groove 210. For the convenience of description, the bottom wall 211 of the mounting groove 210 will be referred to as the bottom wall 211 in the following text.

[0048] In the embodiment of the present application, the catheter sheath connector 300 is used to connect directly or indirectly to the catheter sheath 30, and the expansion sheath connector 100 is used to connect directly or indirectly to the expansion sheath 20. In one example, Figures 1 to 3As shown, the catheter sheath connector 300 is used to directly connect to the catheter sheath 30, while the dilator sheath connector 100 is used to indirectly connect to the dilator sheath 20. Specifically, the catheter sheath connector 300 is provided with a first mounting channel 310 extending along a first direction. The first mounting channel 310 is coaxially arranged with the through hole 220 and is used to insert the catheter sheath 30. A second mounting channel 113 is defined on the side of the connecting portion 110 facing away from the dilator sheath connector 100. The second mounting channel 113 extends into the dilator sheath connector 100 and is also coaxially arranged with the through hole 220. The second mounting channel 113 is used to insert the dilator sheath 20, thereby connecting the dilator sheath connector 100 to the dilator sheath 20. During the assembly process, the connecting portion 110 with the expansion sheath 20 is inserted into the mounting groove 210 through the through hole 220. Specifically, the expansion sheath 20 extends into the first mounting channel 310 of the catheter sheath connector 300 in the mounting groove 210 through the through hole 220 and is inserted into the catheter sheath 30. The end of the connecting portion 110 facing away from the expansion sheath connector 100 extends into the mounting groove 210 through the through hole 220.

[0049] In the embodiment of the present application, the avoidance groove 221 is disposed on the inner wall of the through-hole 220 and extends through the bottom wall 211 of the mounting slot 210 along a first direction. Specifically, the avoidance groove 221 comprises at least a first opening on the inner wall of the through-hole 220, a second opening on a side of the bottom wall 211 facing the mounting slot 210, and a third opening on a side of the bottom wall 211 facing away from the mounting slot 210. The first opening is in communication with the second and third openings, respectively. In the embodiment of the present application, in the radial direction of the through-hole 220, the distance between the side of the retaining protrusion 111 facing away from the connecting portion 110 and the axis of the through-hole 220 is a first distance, which is greater than the inner diameter of the through-hole 220. In the radial direction of the through-hole 220, the distance between the side wall of the avoidance groove 221 opposite the first opening and the axis of the through-hole 220 is a second distance, which is greater than or equal to the first distance. This allows the retaining protrusion 111 to pass through the avoidance groove 221.

[0050] In some embodiments, the limiting protrusion 111 can pass through the avoidance groove 221 and extend into the installation groove 210. When the connecting portion 110 rotates around the axis of the hole 220, the limiting protrusion 111 and the bottom wall 211 are opposite to each other in the axial direction (i.e., the first direction) of the through hole 220. The limiting protrusion 111 is located between the bottom wall 211 and the catheter sheath connector 300, so that the limiting protrusion 111 is positioned at the upper limit of the axial direction of the through hole 220. In other embodiments, such as Figures 5 to 8As shown, a guide groove 250 connected to the avoidance groove 221 can be opened on the inner wall of the through hole 220, and the guide groove 250 extends circumferentially around the hole 220. The limiting protrusion 111 can be extended into the avoidance groove 221, and as the connecting part 110 rotates around the axis of the hole 220 to extend into the guide groove 250, the axial movement of the limiting protrusion 111 in the through hole 220 is limited by the inner wall of the guide groove 250.

[0051] During the locking process, after the limiting protrusion 111 passes through the avoidance groove 221 and extends into the installation groove 210, the connecting part 110 is rotated clockwise or counterclockwise around the axis of the hole 220, so that the limiting protrusion 111 is limited in the first direction, thereby limiting the relative position of the catheter sheath connector 300 and the expansion sheath connector 100 in the first direction; since the first clamping part 222 is provided on the inner wall of the through hole 220, and the second clamping part 112 is provided on the outer peripheral surface of the connecting part 110, the connecting part After the connecting portion 110 passes through the through hole 220, the maximum rotation angle is less than one circle (i.e., less than 360 degrees), so that the first clamping portion 222 and the second clamping portion 112 can be mutually clamped. Through the cooperation of the first clamping portion 222 and the second clamping portion 112, the dilator sheath connector 100 and the catheter sheath connector 300 are limited in the circumferential direction of the through hole 220, thereby achieving the locking between the dilator sheath connector 100 and the catheter sheath connector 300, that is, the locking of the catheter sheath 30 and the dilator sheath 20. During the unlocking process, it is only necessary to rotate the connecting portion 110 around the axis of the hole 220 in the opposite direction to the locking process by the same angle, so that the dilator sheath connector 100 and the catheter sheath connector 300 can be unlocked, that is, the unlocking of the catheter sheath 30 and the dilator sheath 20. For example, during the locking process, the connecting portion 110 rotates clockwise around the axis of the hole 220 by a first angle to lock the introducer sheath connector 300 and the dilator sheath connector 100. During the unlocking process, the connecting portion 110 rotates counterclockwise around the axis of the hole 220 by a first angle to unlock the introducer sheath connector 300 and the dilator sheath connector 100. For ease of description, the following description will take the example of the connecting portion 110 rotating clockwise around the axis of the hole 220 during the locking process to lock the introducer sheath connector 300 and the dilator sheath connector 100.

[0052] From the above, it can be seen that during the locking or unlocking process of the locking assembly 10 provided in the embodiment of the present application, the maximum angle of rotation required for the connecting part 110 is less than 360 degrees. In this way, the twisting force on the blood vessels can be effectively reduced, the blood vessels can be better protected, and the risk of blood vessel damage can be reduced.

[0053] In some optional embodiments, one of the first clamping portion 222 and the second clamping portion 112 is a clamping groove structure, and the other is a protruding structure. Figure 2As shown, the first engaging portion 222 is a slot structure, and the second engaging portion 112 is a protrusion structure. When the second engaging portion 112 moves relative to the first engaging portion 222 as the connecting portion 110 rotates, the second engaging portion 112 is inserted into the first engaging portion 222, thereby engaging the first engaging portion 222 and the second engaging portion 112. To separate the first engaging portion 222 from the second engaging portion 112, simply rotate the connecting portion 110 again to move the second engaging portion 112 out of the first engaging portion 222.

[0054] In one possible design, there are multiple first engaging portions 222, each of which is evenly spaced on the inner wall of the through-hole 220 around the axis of the hole 220. Each first engaging portion 222 is spaced circumferentially from the avoidance groove 221 around the hole 220. There are also multiple second engaging portions 112, each of which is equal to the number of first engaging portions 222. The multiple second engaging portions 112 are evenly spaced on the outer circumference of the connecting portion 110 around the axis of the hole 220.

[0055] According to the above embodiment, since the number of first and second clamping portions 222 and 112 is equal, and the plurality of first and second clamping portions 222 and 112 are evenly spaced around the axis of the through hole 220, the circumferential distance between two adjacent first clamping portions 222 and the circumferential distance between two adjacent second clamping portions 112 are equal. When one of the first clamping portions 222 engages with one of the second clamping portions 112, the remaining first and second clamping portions 222 and 112 also sequentially engage with each other. This ensures more reliable positioning of the dilator sheath connector 100 and the catheter sheath connector 300 in the circumferential direction of the through hole 220. Furthermore, in this embodiment, during the locking or unlocking process, the maximum angle that the connecting portion 110 must rotate is less than the angle corresponding to the arc length between any two adjacent first clamping portions 222. The arc length between any two adjacent first clamping portions 222 specifically refers to the arc length of the area of ​​the inner wall of the through hole 220 located between the two adjacent first clamping portions 222, measured in the circumferential direction of the through hole 220. Furthermore, since there are multiple first clamping portions 222, i.e., there are at least two first clamping portions 222, this arrangement ensures that during the locking or unlocking process of the locking assembly 10, the maximum angle that the connecting portion 110 must rotate is less than 180 degrees, further reducing the twisting force on the blood vessel and thereby the risk of vascular damage.

[0056] In a specific embodiment, there are two first clamping portions 222 and two second clamping portions 112, with the two first clamping portions 222 disposed opposite each other and the two second clamping portions 112 disposed opposite each other. In this embodiment, the two first clamping portions 222 divide the inner wall of the through hole 220 into a first wall surface and a second wall surface, and the avoidance groove 221 can be located on the first wall surface or the second wall surface. The two second clamping portions 112 divide the outer peripheral surface of the connecting portion 110 into a first area and a second area, and the limiting protrusion 111 can be located in the first area or the second area, or the limiting protrusion 111 can be disposed opposite one of the second clamping portions 112 in the first direction.

[0057] In some optional embodiments, there are multiple avoidance grooves 221, and the multiple avoidance grooves 221 are evenly spaced and arranged on the inner wall of the through hole 220 around the axis of the hole 220. Optionally, there are two avoidance grooves 221, one of which is located on the first wall surface and the other is located on the second wall surface.

[0058] In some optional embodiments, the number of the limiting protrusions 111 is also multiple, the number of the avoidance grooves 221 and the limiting protrusions 111 are equal, and the multiple limiting protrusions 111 are evenly spaced around the axis of the hole 220 and arranged on the outer peripheral surface of the connecting portion 110. Optionally, the number of the limiting protrusions 111 is two, one of the limiting protrusions 111 is in the first zone, and the other limiting protrusion 111 is in the second zone. Alternatively, the two second clamping portions 112 are arranged in a one-to-one correspondence with the two limiting protrusions 111. Figure 4As shown, the second engaging portions 112 and the corresponding limiting protrusions 111 are opposite to each other in the first direction. This arrangement allows each second engaging portion 112 to first move with the connecting portion 110 and extend into the avoidance groove 221, and then, driven by the connecting portion 110, rotate around the axis of the hole 220 until it engages with the corresponding first engaging portion 222. This reduces the resistance encountered by the connecting portion 110 when passing through the hole 220, making the operation more labor-efficient and preventing the operator from injuring blood vessels by excessive force. Furthermore, in this embodiment, during the locking or unlocking process, the angle required for the connecting portion 110 to rotate is at least less than the angle corresponding to the arc length between the avoidance groove 221 and any adjacent first engaging portion 222. The arc length between the avoidance groove 221 and any adjacent first engaging portion 222 specifically refers to the arc length of the area between the avoidance groove 221 and the adjacent first engaging portion 222 on the inner wall of the hole 220, along the circumference of the hole 220. Since the two avoidance grooves 221 are respectively located on the first wall surface and the second wall surface, it can be seen that the angle corresponding to the arc length between the avoidance groove 221 and any adjacent first clamping portion 222 is at least smaller than the angle corresponding to the arc length between the two first clamping portions 222. In other words, such a setting further reduces the maximum angle required for the connecting portion 110 to rotate during the locking and unlocking process, thereby further reducing the twisting force on the blood vessel.

[0059] In a specific embodiment, one of the avoidance grooves 221 is located in the middle region of the first wall, and the other avoidance groove 221 is located in the middle region of the second wall. The middle region of the first wall specifically refers to the region of the first wall that is equal to the distance between the two first clamping portions 222. That is, the distance between the middle region of the first wall and one of the first clamping portions 222 is equal to the distance between the middle region and the other first clamping portion 222. Similarly, the distance between the middle region of the second wall and one of the first clamping portions 222 is equal to the distance between the middle region and the other first clamping portion 222. This arrangement ensures that the angle corresponding to the arc length between each avoidance groove 221 and any adjacent first clamping portion 222 is less than 90 degrees, thereby ensuring that the maximum rotation angle of the connecting portion 110 is less than 90 degrees, thereby enabling the dilation sheath connector 100 to be locked or unlocked with the catheter sheath connector 300.

[0060] In one example, a limiting protrusion 111 and a second clamping portion 112 are protruded from the outer peripheral surface of the connecting portion 110 . The limiting protrusion 111 and the expansion sheath connector 100 are spaced apart along the first direction, and the second clamping portion 112 is located between the limiting protrusion 111 and the expansion sheath connector 100 .

[0061] In one possible design, Figure 5 and Figure 6As shown, the inner wall of the through hole 220 has a gradient zone 230, which is located between the avoidance groove 221 and the first clamping portion 222. The inner diameter of the gradient zone 230 gradually decreases from the side close to the avoidance groove 221 to the side close to the first clamping portion 222 in the circumferential direction of the hole 220. In this arrangement, by providing the gradual transition zone 230, when the connecting portion 110 rotates around the axis of the hole 220 to bring the second clamping portion 112 closer to the first clamping portion 222, the gap between the outer circumferential surface of the connecting portion 110 and the inner wall of the through hole 220 decreases from large to small, thereby making the connecting portion 110 more labor-saving when it first starts to rotate. As the second clamping portion 112 approaches the first clamping portion 222, the gap between the outer circumferential surface of the connecting portion 110 and the inner wall of the through hole 220 decreases, so that the distance between the second clamping portion 112 and the inner wall of the through hole 220 gradually decreases, thereby facilitating stable clamping of the first clamping portion 222 and the second clamping portion 112. It can be seen that such an arrangement can make the rotation of the connecting portion 110 more labor-saving while ensuring the clamping stability of the first clamping portion 222 and the second clamping portion 112.

[0062] In some embodiments, when there are multiple avoidance grooves 221 and multiple first clamping portions 222, a gradient zone 230 is provided in the inner wall of the via hole 220 between the avoidance groove 221 and one of the adjacent first clamping portions 222. The inner diameter of the gradient zone 230 gradually decreases from the side close to the avoidance groove 221 to the side close to the adjacent first clamping portion 222. In one example, Figures 5 to 7 As shown, there are two avoidance grooves 221 and two first clamping portions 222. The two first clamping portions 222 divide the inner wall of the via hole 220 into a first wall surface and a second wall surface. One avoidance groove 221 is located on the first wall surface, and the other avoidance groove 221 is located on the second wall surface. The first wall surface and the second wall surface are respectively provided with a gradual transition zone 230. The gradual transition zone 230 on the first wall surface is located between the avoidance groove 221 in the first wall surface and the first clamping portion 222 located on one side of the avoidance groove 221 in the clockwise direction. The gradual transition zone 230 on the second wall surface is located between the avoidance groove 221 in the second wall surface and the first clamping portion 222 located on one side of the avoidance groove 221 in the clockwise direction.

[0063] In one possible design, Figure 5As shown, the bottom wall 211 includes an elastic region located on the side of the transition region 230 facing away from the through-hole 220. With this arrangement, when the second clamping portion 112 passes through the transition region 230 during rotation of the connecting portion 110, the second clamping portion 112 presses against the transition region 230, causing the transition region 230 to press against the elastic region, thereby compressing the elastic region and causing the transition region 230 to concave. This helps reduce the resistance encountered during rotation of the connecting portion 110, making the locking process of the catheter sheath connector 300 and the dilation sheath connector 100 more labor-efficient. Alternatively, the elastic region can be made of an elastic material, such as rubber or polyurethane.

[0064] In one possible design, Figure 5 As shown, a through hole 241 is provided through the elastic region along the first direction. The provision of through hole 241 increases the elastic region's deformability, thereby further reducing the resistance encountered by the connecting portion 110 during rotation. In some embodiments, when there are multiple transition zones 230, there are also multiple elastic regions, and the multiple elastic regions are provided in a one-to-one correspondence with the multiple transition zones 230, with each elastic region located on the side of the corresponding transition zone 230 facing away from the through hole 220. In some embodiments, the through hole 241 is an arc-shaped hole, extending around the circumference of the hole 220.

[0065] In one possible design, Figures 5 to 8 As shown, the inner wall of the through hole 220 is further provided with a guide groove 250. The guide groove 250 extends around the circumference of the through hole 220, and one end of the guide groove 250 in the circumferential direction of the through hole 220 is connected to the avoidance groove 221. The limiting protrusion 111 can rotate around the axis of the through hole 220 along with the connecting portion 110 and extend into the guide groove 250 from the avoidance groove 221. The other end of the guide groove 250 in the circumferential direction of the through hole 220 has a limiting surface 251 for contacting the limiting protrusion 111. The limiting surface 251 is configured to contact the limiting protrusion 111 when the first engaging portion 222 and the second engaging portion 112 are engaged. In this arrangement, the limiting surface 251 is provided to limit the limiting protrusion 111, thereby limiting the rotation angle of the connecting portion 110 and effectively preventing the connecting portion 110 from rotating excessively.

[0066] In some embodiments, when there are multiple avoidance grooves 221, there are also multiple guide grooves 250. The multiple guide grooves 250 are arranged in a one-to-one correspondence with the multiple avoidance grooves 221. One end of each guide groove 250 is opposite to the corresponding avoidance groove 221 in the first direction, and the other end extends clockwise around the axis of the hole 220. In this arrangement, when the limiting protrusion 111 moves with the connecting portion 110 and passes through the avoidance groove 221, it can enter the guide groove 250. Then, by rotating the connecting portion 110 clockwise around the axis of the hole 220 until the limiting protrusion 111 contacts the limiting surface 251 of the guide groove 250, the catheter sheath connector 300 and the dilator sheath connector 100 can be locked.

[0067] In one possible design, Figure 2 and Figure 3 As shown, the locking assembly 10 further includes a hemostatic sealing ring 400, which is installed in the catheter sheath connector 300. The hemostatic sealing ring 400 is provided with a slit 420, which is used to allow the expansion sheath 20 to pass through. The hemostatic sealing ring 400 is provided to form a seal between the expansion sheath 20 and the catheter sheath connector 300, thereby improving the sealing performance of the locking assembly 10, preventing blood from flowing out, and reducing the risk of blood loss in the patient.

[0068] In some embodiments, as Figure 2 and Figure 3 As shown, the locking assembly 10 further includes a sealing cap 500. The sealing cap 500 is positioned against the side of the bottom wall 211 facing the catheter sheath connector 300. The outer circumference of the sealing cap 500 abuts the sidewalls of the mounting groove 210. Furthermore, the side of the sealing cap 500 facing away from the bottom wall 211 extends into the first mounting channel 310, abutting the inner wall of the first mounting channel 310. It is worth noting that the sidewalls of the mounting channel 210 specifically refer to the sidewalls of the mounting channel 210 that are parallel to the first direction and are disposed around the bottom wall 211 of the mounting channel 210. The sealing cap 500 is provided with a connecting hole extending along the first direction. The dilation sheath 20 extends into the inner bore of the catheter sheath 30 via the through-hole 220, the connecting hole, and the slit 420 of the hemostatic seal 400. The provision of the sealing cap 500 improves the connection between the catheter sheath connector 300 and the connecting cap 200, further preventing blood from flowing out. In this embodiment, the hemostatic sealing ring 400 is specifically installed in the first installation channel 310 of the catheter sheath connector 300 in the installation groove 210, and the outer peripheral surface of the hemostatic sealing ring 400 abuts against the inner wall of the first installation channel 310. The hemostatic sealing ring 400 is specifically used to form a seal between the expansion sheath 20 and the first installation channel 310.

[0069] In one possible design, the hemostatic sealing ring 400 has a hemispherical concave surface 410 on one side in the first direction and a flat surface on the other side. There are two hemostatic sealing rings 400, and they are positioned so that their flat surfaces face one another. For ease of description, the one of the two hemostatic sealing rings 400 that is relatively close to the via 220 is referred to as the first sealing ring, and the other as the second sealing ring. It is worth noting that the hemispherical concave surface 410 refers to the area on the outer surface of the hemostatic sealing ring 400 that is recessed toward the interior of the hemostatic sealing ring 400, and the surface shape of this area is similar to that of a sphere.

[0070] According to the above embodiment, when the dilation sheath 20 is inserted into the mounting groove 210 through the through-hole 220 and passes through the slits 420 in the two hemostatic sealing rings 400, the flat surface of the second sealing ring provides a stable abutment against the first sealing ring, thereby effectively preventing the first sealing ring from everting. Furthermore, the hemispherical concave surface 410 on the side of the second sealing ring facing away from the first sealing ring provides a stable support for the slits 420 in the second sealing ring, thereby effectively preventing the second sealing ring from everting. Conversely, when the dilation sheath 20 is withdrawn from the catheter sheath 30, the flat surface of the first sealing ring provides a stable abutment against the second sealing ring, thereby also effectively preventing the second sealing ring from everting. Furthermore, the hemispherical concave surface 410 on the side of the first sealing ring facing away from the second sealing ring provides a stable support for the slits 420 in the first sealing ring, thereby also effectively preventing the first sealing ring from everting. In summary, this arrangement effectively improves the structural stability of the hemostatic sealing ring 400, thereby enhancing the hemostatic effect and further reducing the risk of blood loss in the patient.

[0071] In one possible design, the slits 420 on the hemispherical concave surfaces 410 of the two hemostatic sealing rings 400 are arranged at an angle. This arrangement allows the slits 420 on the two hemostatic sealing rings 400 to clamp and stably wrap around the outer circumference of the expansion sheath 20 from two different directions, further enhancing the hemostatic effect of the locking assembly 10. Alternatively, the slits 420 on the two hemostatic sealing rings 400 can be arranged at an angle of 30 degrees, 41 degrees, 45 degrees, or 90 degrees, which is not a limitation here.

[0072] In some embodiments, as Figure 3 As shown, the catheter sheath connector 300 is further provided with a third installation channel 320, the axis of which is arranged at an angle to the axis of the first installation channel 310. The third installation channel 320 is connected to the first installation channel 310 and is used to insert the extension tube 40.

[0073] Second embodiment

[0074] This embodiment provides a sheath device, comprising a guide sheath 30, an expansion sheath 20, and the locking assembly 10 provided in any of the aforementioned embodiments. The guide sheath 30 is mounted in the mounting groove 210, the expansion sheath 20 is connected to the connecting portion 110, and the expansion sheath 20 is passed through the through hole 220, the mounting groove 210, and the inner hole of the guide sheath 30. Compared with the related art, since the sheath device provided in the embodiment of the present application includes the locking assembly 10 provided in any of the aforementioned embodiments, it has at least all of the aforementioned beneficial effects, which will not be further elaborated here.

[0075] In some embodiments, the sheath device further includes an extension tube 40, which is inserted into the third channel of the catheter sheath connector 300. The extension tube 40 can be used for emptying, pressure measurement, and blood sampling.

[0076] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A locking assembly, characterized in that: include: The connecting cap has a mounting groove formed on one side in the first direction, the mounting groove having a bottom wall opposite to the opening thereof, the bottom wall being penetrated by a through hole along the first direction, an avoidance groove being formed on an inner wall of the through hole, and a first clamping portion being formed; a catheter sheath connector, mounted in the mounting slot through an opening of the mounting slot; An expansion sheath connector is provided with a connecting portion on one side in the first direction, and a second clamping portion and a limiting protrusion are provided on the outer peripheral surface of the connecting portion parallel to the first direction. The connecting portion is inserted into the mounting groove via the through hole, and the limiting protrusion can move with the connecting portion and pass through the avoidance groove; the connecting portion can rotate around the axis of the through hole relative to the catheter sheath connector to clamp the first clamping portion and the second clamping portion, and to limit the axial position of the limiting protrusion relative to the connecting cap in the through hole.

2. The locking assembly according to claim 1, wherein: There are multiple first clamping portions, and the multiple first clamping portions are evenly spaced around the axis of the through hole on the inner wall of the through hole, and each first clamping portion is spaced from the avoidance groove around the circumference of the through hole; There are also multiple second clamping portions, which are equal in number to the first clamping portions. The multiple second clamping portions are evenly spaced around the axis of the through hole and arranged on the outer peripheral surface of the connecting portion.

3. The locking assembly according to claim 1, wherein: The inner wall of the through hole has a gradual change zone, which is located between the avoidance groove and the first clamping portion. The inner diameter of the gradual change zone gradually decreases from a side close to the avoidance groove to a side close to the first clamping portion.

4. The locking assembly according to claim 3, wherein: The bottom wall includes an elastic region, and the elastic region is located on a side of the gradual change region away from the via hole.

5. The locking assembly according to claim 4, wherein: A through hole is formed through the elastic region along the first direction.

6. The locking assembly according to claim 1, wherein: The inner wall of the through hole is also provided with a guide groove, which extends around the circumference of the through hole, and is connected to the avoidance groove at one end of the guide groove in the circumferential direction of the through hole. The limiting protrusion can rotate around the axis of the through hole along with the connecting part and extend into the guide groove from the avoidance groove; the guide groove has a limiting surface at the other end in the circumferential direction of the through hole for contacting the limiting protrusion, and the limiting surface is used to contact the limiting protrusion when the first clamping part and the second clamping part are clamped.

7. The locking assembly according to any one of claims 1 to 6, wherein: The locking assembly further comprises a hemostatic sealing ring which is installed in the catheter sheath connector. The hemostatic sealing ring is provided with a slit which is used for the expansion sheath to pass through.

8. The locking assembly according to claim 7, wherein: One side of the hemostatic sealing ring in the first direction is a hemispherical concave surface and the other side is a plane, and the slit extends from the hemispherical concave surface toward the direction close to the plane; there are two hemostatic sealing rings, and the two hemostatic sealing rings are arranged to be in contact with one side of the plane.

9. The locking assembly according to claim 8, wherein: The slits on the hemispherical concave surfaces of the two hemostatic sealing rings are arranged at an angle.

10. A sheath device, characterized in that: It comprises a catheter sheath, an expansion sheath and a locking assembly as described in any one of claims 1 to 9, wherein the catheter sheath is installed in the mounting groove, the expansion sheath is connected to the connecting part, and the expansion sheath is passed through the through hole, the mounting groove and the inner hole of the catheter sheath.

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