A pressing component and a guiding sheath

Abstract

The present invention provides a pressing assembly and a guide sheath, which relate to the technical field of medical devices. The present invention includes an adjusting tube connected to the reflux joint, wherein the adjusting tube is provided with an elastic region, wherein the elastic region can undergo elastic deformation under the action of an external force to adjust the flow area of the reflux joint; and a pressing member provided on the sheath tube, wherein the pressing member can move relative to the sheath tube to approach or move away from the elastic region, thereby promoting the elastic region to undergo elastic deformation. The present invention achieves regulation of the flow rate of the reflux channel by controlling the deformation amount of the elastic region, making the flushing process more controllable. The present invention can reduce the fluctuation of pressure in the body to a certain extent, reduce the potential risk of damage to tissues, and at the same time improve the effect of lithotripsy and discharge, thereby improving the safety and stability of medical operations.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a pressing assembly and a guide sheath. Background Art

[0002] A guide sheath is a medical device used to assist in endoscopic examinations and treatments. It is typically made of a flexible material with sufficient rigidity to ensure stability during operation. The guide sheath is used in conjunction with an endoscope, providing a stable channel for the endoscope to pass through the body cavity. During use, the endoscope is inserted into the patient's body through the guide sheath, allowing the physician to observe internal structures while simultaneously performing sampling or other treatment procedures.

[0003] After the endoscope is inserted into the guide sheath, a reflux channel is formed between the guide sheath and the endoscope, and the guide sheath is connected to the negative pressure suction device. Through this reflux channel, the negative pressure suction device can extract fluid from the body. In some surgeries, the doctor will inject flushing fluid through the instrument tube of the endoscope, and the flushing fluid is sucked to the outside through the reflux channel. However, during the reflux process of body fluids, foreign matter such as stones may enter the reflux channel, which may cause blockage of the channel or affect its fluidity. This blockage or poor fluidity will cause local pressure fluctuations, which may cause discomfort or damage to delicate tissues in the body. Summary of the Invention

[0004] In order to solve the above problems, the present application provides a pressing assembly and a guide sheath.

[0005] In a first aspect, the present application provides a pressing assembly, which adopts the following technical solution:

[0006] A pressing assembly is applied to a guide sheath, wherein the guide sheath comprises a sheath tube and a reflux connector, and the pressing assembly comprises:

[0007] a regulating tube connected to the reflux joint, wherein the regulating tube is provided with an elastic region, and the elastic region can be elastically deformed under the action of an external force to adjust the flow area of the reflux joint;

[0008] and a pressing piece, which is arranged on the sheath tube and can move relative to the sheath tube to approach or move away from the elastic region, thereby pushing the elastic region to undergo elastic deformation.

[0009] In a second aspect, the present application provides a guide sheath, which adopts the following technical solution:

[0010] A guide sheath comprises the pressing assembly described in the above technical solution.

[0011] The present invention has the following advantages and beneficial effects:

[0012] The present application connects a regulating tube to the reflux joint and utilizes a pressing member to act on the elastic area of the regulating tube, causing the elastic area to undergo elastic deformation under the action of an external force, thereby changing the flow area of the regulating tube, and then regulating the flow volume of the reflux joint, thereby realizing dynamic regulation of the pressure in the reflux channel.

[0013] During the negative pressure suction process, as the pressure inside the reflux channel decreases, the pressing piece can be pressed to cause the elastic area to sink into the regulating tube, thereby reducing the flow area of the regulating tube and reducing the flow volume. The reduction in flow volume helps to suppress the further decrease in pressure in the reflux channel, allowing the pressure to gradually return to a reasonable range, avoiding excessive negative pressure from acting on tissues in the body and reducing the risk of damage to fragile tissues. On the contrary, when the pressure inside the reflux channel rises, the pressing piece is gradually released, and the elastic area rebounds under its own elasticity, increasing the flow area and thereby increasing the flow volume, prompting the pressure in the reflux channel to drop, thereby maintaining the pressure inside the reflux channel within an appropriate range and improving the stability of negative pressure control.

[0014] In addition, the present application can also optimize the flushing effect of stones by adjusting the flow area of the regulating tube to control the flow rate of the liquid in the reflux channel. In the process of discharging stones through the reflux channel, the pressing piece can be pressed periodically to make the flow rate of the liquid in the reflux channel change periodically. When the flow rate is faster, the liquid exerts a greater impact force on the stones, which helps to push the stones out along the reflux channel; when the flow rate decreases, the fluid pressure in the local area fluctuates, which can disturb or loosen the stones attached to the channel wall, thereby improving the efficiency of stone removal. In this way, the retention of stones in the operating area can be effectively reduced, making it easier for stones to be discharged with the fluid, thereby shortening the operation time, reducing the risk and discomfort of patients during the operation, and improving the safety and stability of medical operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic structural diagram of a pressing assembly according to an embodiment of the present application;

[0017] Figure 2 This is a front view of the pressing assembly of an embodiment of the present application;

[0018] Figure 3 This is a partial structural diagram of the pressing assembly according to an embodiment of the present application;

[0019] Figure 4 is a first schematic diagram of an embodiment of the present application;

[0020] Figure 5 is a second schematic diagram of an embodiment of the present application;

[0021] Figure 6 is a cross-sectional view of an embodiment of the present application;

[0022] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 8 This is a schematic diagram of the structure of the first part of the embodiment of the present application;

[0024] Figure 9 This is a schematic diagram of the second structural part of the embodiment of the present application.

[0025] The following are marked in the figure:

[0026] 10. Guide sheath; 11. Sheath tube; 11a. Handle; 12. Reflux connector; 100. Adjusting tube; 110. Elastic area; 120. Notch; 130. Elastic hose; 140. Fixing member; 141. Deformation portion; 142. Deformation space; 143. Pushing member; 150. Abutment portion; 200. Pressing member; 300. Clamping member; 310. Clamping claw; 311. Guide portion; 320. Clamping groove; 321. Opening; 330. Friction elastic member; 400. Force-applying member; 410. Roller. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0028] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0029] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0030] During lithotripsy surgery on the urinary system, an endoscope enters the renal pelvis through a guide sheath, and after using a laser to break up the stones, the reflux channel formed between the endoscope and the guide sheath is used to discharge the flushing fluid and the gravel. However, the inventors have found that during actual operation, the axial movement of the endoscope relative to the guide sheath will cause the flow area of the reflux channel to change. At the same time, the gravel is easily retained in the reflux channel during the flushing process, which reduces the local flow cross-section. When the flushing fluid flow rate is constant, the fluid pressure in the body increases, thereby increasing the risk of damage to the tissue. In addition, when the retained gravel is suddenly flushed out, the flow area of the reflux channel increases instantaneously, causing a sudden drop in the fluid pressure in the body, which may also cause tissue damage and affect the safety and stability of the operation.

[0031] In order to solve the above problems, the present invention provides a pressing component, which deforms the elastic area of the regulating tube by pressing the pressing piece, thereby dynamically adjusting the flow area of the regulating tube, and then changing the flow volume of the reflux channel, and realizing real-time regulation of the flow volume of the reflux channel. Specifically, during the negative pressure suction process, when the pressure in the reflux channel drops, pressing the pressing piece can cause the elastic area to concave inward, thereby reducing the flow area of the regulating tube, reducing the flow rate of the flushing liquid, and returning the pressure to a reasonable range; when the pressure in the reflux channel rises, the pressing piece is released to reduce the deformation of the elastic area, thereby increasing the flow area of the regulating tube, increasing the flow volume, and reducing the pressure of the reflux channel to an appropriate range. In this way, the dynamic balance of the pressure inside the reflux channel can be effectively maintained, reducing the damage to the tissues in the body due to drastic pressure fluctuations.

[0032] The following is combined with Figures 1 to 9 , a pressing assembly and a guide sheath provided in this application are described in detail through specific embodiments and their application scenarios.

[0033] The first aspect of this embodiment provides a detailed description of a pressing component.

[0034] Reference Figure 4 、 Figure 5The present application discloses a pressing assembly for use with a guide sheath 10. For example, the pressing assembly is detachably connected to the guide sheath 10. For example, the pressing assembly can be connected to the guide sheath 10 by snapping or threading, so as to facilitate assembly and disassembly and improve adaptability. In some embodiments, the pressing assembly is integrally connected to the guide sheath 10. For example, the pressing assembly can be connected to the guide sheath 10 by a fixed connection method such as welding or bonding, so as to enhance structural stability and reduce possible loose connection problems.

[0035] In some embodiments, the guide sheath 10 includes a sheath tube 11 and a return connector 12, wherein the sheath tube 11 is provided with a handle 11a for the operator to hold and control the operation of the guide sheath 10. The pressing assembly includes an adjustment tube 100 and a pressing member 200, wherein the adjustment tube 100 is a hollow tubular structure with openings 321 at both ends and is connected to the return connector 12. In certain embodiments, the adjustment tube 100 can be integrally formed with the return connector 12, or a detachable connection method can be used, such as a threaded connection, a snap connection, or a sleeve connection, to facilitate disassembly and replacement.

[0036] The sidewall of the regulating tube 100 is provided with an elastic region 110. Specifically, this portion of the sidewall of the regulating tube 100 is constructed from an elastic structure, enabling it to deform under external forces. Specifically, when pressure is applied to the elastic region 110, it indents into the interior of the regulating tube 100, partially encroaching upon the flow passage of the regulating tube 100 and reducing its flow area. Conversely, when the pressure is released, the elastic region 110 rebounds to its original shape due to its own elastic restoring force, increasing the flow area of the regulating tube 100 and restoring the patency of the fluid passage.

[0037] Exemplarily, the elastic region 110 is made of an elastic material, such as rubber, silicone, or other polymeric materials with excellent elastic properties. The elastic region 110 can be integrally formed with the regulating tube 100 or secured to the regulating tube 100 by welding, bonding, or sleeve connection to meet various manufacturing and assembly requirements.

[0038] In some embodiments, reference Figure 4 、 Figure 5, the pressing member 200 is provided on the sheath tube 11, and the pressing member 200 can move relative to the sheath tube 11 to approach or move away from the elastic region 110, thereby pushing the elastic region 110 to undergo elastic deformation. Exemplarily, the pressing member 200 is detachably fixed to the handle 11a, and together with the handle 11a forms a scissors-like structure, which is convenient for the operator to hold and control. When the operator holds the handle 11a and presses the pressing member 200, the pressing member 200 moves toward the elastic region 110 and applies pressure, causing the elastic region 110 to deform toward the inside of the regulating tube 100, thereby reducing the flow area of the regulating tube 100. On the contrary, when the force on the handle 11a is released, the pressing member 200 is reset, and the elastic region 110 returns to its original shape under the action of its own elastic force, so that the flow area of the regulating tube 100 is increased to restore the patency of the fluid channel.

[0039] The design of the handle 11a-shaped structure of the scissors has significant advantages in terms of operation. First, the design of the handle 11a-shaped structure of the scissors is ergonomic, and the operator can naturally control the movement of the pressing member 200 by pinching and opening the fingers. Compared with the traditional knob adjustment or push-pull adjustment method, this design reduces the complicated rotation or sliding operation, making the adjustment process more intuitive and labor-saving. Secondly, the handle 11a-shaped structure of the scissors makes the force direction more in line with the operation intuitive. After the operator holds the handle 11a, the pressure of the finger can be amplified by the lever effect, so that the pressing member 200 can still apply stable pressure to the elastic area 110 under a smaller hand force. This structure not only reduces the fatigue of the operator, but also improves the stability of the adjustment and avoids misadjustment due to hand tremors.

[0040] In actual use, the operator can achieve fine control of the flow area of the regulating tube 100 by tightening or loosening his hands to varying degrees. For example, when it is necessary to reduce the flow rate, the operator can increase the grip strength so that the elastic area 110 bulges toward the inside of the regulating tube 100, thereby reducing the flow area of the regulating tube 100, reducing the amount of fluid passing through, and inhibiting further decreases in the pressure in the reflux channel. When it is necessary to increase the flow rate, the grip strength can be appropriately relaxed to move the pressing member 200 away from the handle 11a, reducing the height of the elastic area 110 protruding into the regulating tube 100, increasing its flow area, thereby improving the flow capacity and promoting fluid discharge. This intuitive operation method can not only quickly respond to intraoperative needs, but also improve the stability of negative pressure suction, making the pressure regulation of the reflux channel more precise.

[0041] This structural design also improves the grip comfort of handle 11a. While traditional handles 11a can be relatively simple and difficult to adapt to different operator hand shapes, the scissor-like structure provides a more flexible grip, enabling comfortable operation for operators of varying hand sizes. Furthermore, this structure reduces the burden on one-handed operation, ensuring more stable operation and improving intraoperative control precision.

[0042] In actual use, the regulating function of the pressing member 200 can stabilize the pressure in the reflux channel and reduce tissue damage caused by sudden changes in flow rate. When the pressure in the reflux channel drops, pressing the pressing member 200 can further reduce the flow area, thereby suppressing excessive decreases in negative pressure, maintaining the body's fluid pressure within a reasonable range, and avoiding tissue adsorption damage caused by excessive negative pressure. Conversely, when the pressure in the reflux channel increases, the pressing member 200 is gradually released, increasing the flow area, accelerating the fluid discharge rate, thereby reducing local pressure and reducing the impact of the sudden pressure increase on the tissue.

[0043] Furthermore, the control function of the pressure element 200 optimizes the flushing effect of the lithotripsy. By periodically pressing and releasing the pressure element 200, the flow rate is dynamically varied, improving lithotripsy removal efficiency. When the flow rate is high, the flushing fluid enhances the driving effect on the lithotripsy, increasing its removal rate. When the flow rate decreases, the pressure fluctuations loosen or dislodge any trapped lithotripsy, enhancing the thoroughness of lithotripsy removal. This not only improves surgical cleaning efficiency but also reduces lithotripsy retention time, thereby reducing surgical risk and improving the stability of intraoperative control.

[0044] According to an alternative embodiment, referring to Figure 1 、 Figure 4 The pressing assembly further includes a clamping member 300, which is used to be detachably connected to the sheath tube 11, and the pressing member 200 is movably connected to the clamping member 300. This design enables the pressing assembly to be quickly installed and disassembled, thereby improving the flexibility of the device.

[0045] Since the pressing assembly can be non-destructively disassembled and assembled with the sheath 11 through the clip 300, the pressing assembly has a high degree of reusability, thereby reducing the waste of consumables during use and lowering surgical costs. In addition, the detachable design of the pressing assembly also supports the replacement of pressing members 200 of different specifications according to the hand size and force application habits of different operators, making the operation more comfortable and precise, and improving the control stability during long-term use. Therefore, this design not only improves the adaptability and ease of operation of the pressing assembly, but also reduces the cost of use and improves the comfort of the operator and the accuracy of surgical control.

[0046] For example, the clip 300 employs a magnetic structure, with a magnetic element disposed within the clip 300 and a magnetic adsorption block disposed at a corresponding position on the sheath 11, allowing the pressing assembly to be magnetically adsorbed to and secured to the sheath 11. The pressing assembly can be fine-tuned by rotating or sliding to accommodate different operating angles.

[0047] In another embodiment, the clamping member 300 is connected to the sheath tube 11 by a threaded connection. The end of the clamping member 300 is provided with an external thread, and the sheath tube 11 is provided with a corresponding internal thread, so that the clamping member 300 can be fixed to the sheath tube 11 by screwing. Through the threaded connection, the pressing assembly can achieve reliable fixation and is suitable for use scenarios requiring high stability.

[0048] In another embodiment, the clip 300 includes a button locking mechanism comprising a spring-loaded locking pin. When the push assembly is installed, the spring-loaded locking pin automatically engages a locking groove on the sheath 11, securing the push assembly. To disassemble the push assembly, the unlocking button is pressed, disengaging the spring-loaded locking pin from the locking groove and releasing the push assembly for replacement or adjustment.

[0049] According to an alternative embodiment, referring to Figure 2 、 Figure 4 The clamping member 300 includes an elastic claw 310, which is formed with a clamping groove 320. The clamping groove 320 has an opening 321. The claw 310 can be elastically deformed under the action of an external force, so that the sheath tube 11 can pass through the opening 321 and enter the clamping groove 320. The claw 310 can restrain the sheath tube 11 in the clamping groove 320. Specifically, the claw 310 is elastically deformed under the action of an external force, allowing the sheath tube 11 to pass through the opening 321 and enter the clamping groove 320. After the claw 310 returns to its original shape, it can restrain the sheath tube 11, so that the sheath tube 11 maintains a stable position in the clamping groove 320.

[0050] This structure has significant advantages during the installation process. First, due to the elastic properties of the claw 310, the sheath 11 can smoothly enter the snap-in groove 320 through the opening 321, reducing the operational complexity during the installation process, thereby increasing the installation speed. After the installation is completed, the limiting function of the claw 310 can effectively control the direction of the sheath 11, avoiding the situation where the pressing member 200 and the elastic area 110 are not opposite each other due to improper installation. Specifically, the design of the claw 310 and the snap-in groove 320 makes the sheath 11 more stable and controlled in the direction of the pressing member 200, which helps to improve the reliability and accuracy of the device during use.

[0051] According to an alternative embodiment, referring to Figure 3 、 Figure 4The claw 310 is provided with a guide portion 311, which is located at the opening 321 to guide the sheath tube 11 into the engaging groove 320. The guide portion 311 is provided to guide the sheath tube 11 or the handle 11a smoothly into the engaging groove 320. Specifically, the guide portion 311 is located at the opening 321 of the engaging groove 320, and its main function is to ensure that the handle 11a can smoothly enter the engaging groove 320 when connected to the engaging member 300. With this structure, when connecting the engaging member 300 to the handle 11a, the user only needs to point the opening 321 toward the handle 11a, so that the handle 11a abuts the opening 321, and press the engaging member 300. At this time, the design of the guide portion 311 can effectively guide the claw 310 to gradually open, thereby increasing the opening 321 of the engaging groove 320 and facilitating the smooth entry of the handle 11a into the engaging groove 320.

[0052] Once the handle 11a is fully inserted into the engaging groove 320, the claw 310 will return to its original shape due to its own elasticity, and the opening 321 will return to its original size, thus firmly fixing the engaging member 300 to the handle 11a. This elastic recovery mechanism forms a stable connection between the engaging member 300 and the handle 11a, reducing loosening caused by external forces or other interference factors during use.

[0053] When the handle 11a needs to be separated from the clamping part 300, the user only needs to pull the handle 11a and the clamping part 300 in the direction away from each other. The claw 310 will open due to its elastic structure, thereby increasing the opening 321 of the clamping groove 320. The handle 11a can be separated from the clamping groove 320, thereby achieving the separation of the clamping part 300 and the handle 11a.

[0054] The advantage of this design is that it provides a simple and structurally reliable connection method. The provision of the guide portion 311 effectively reduces the mismatch between the handle 11a and the connection slot 320, and the elastic deformation of the claw 310 enables simple and quick installation and removal. Through this design, the connection member 300 not only ensures the stability of the handle 11a within the connection slot 320, but also allows for easy removal when needed, facilitating maintenance and replacement of the device.

[0055] According to an alternative embodiment, referring to Figure 3 、 Figure 4The inner wall of the clamping groove 320 is provided with a friction elastic member 330. The friction elastic member 330 is located at the opening 321. When the sheath tube 11 is located in the clamping groove 320, the friction elastic member 330 abuts against the sheath tube 11. Specifically, the friction elastic member 330 is provided at the opening 321 of the clamping groove 320, and when the sheath tube 11 is located in the clamping groove 320, the friction elastic member 330 forms contact with the sheath tube 11, thereby increasing the friction force, making the connection between the clamping member 300 and the handle 11a tighter and more stable. By providing additional friction, the friction elastic member 330 helps prevent the clamping member 300 and the handle 11a from accidentally separating during use, thereby improving the stability of the device.

[0056] Furthermore, because the friction elastic member 330 is located on the inner wall of the engaging groove 320, its design does not interfere with the installation of the engaging member 300 onto the handle 11a. During installation, the friction elastic member 330 has minimal contact with the sheath 11, presenting no hindrance. Once installation is complete and the engaging member 300 and handle 11a are firmly connected, the friction elastic member 330 gradually takes effect, increasing the friction between the engaging member 300 and the handle 11a, thereby effectively preventing the engaging member 300 from loosening or falling off.

[0057] During disassembly, the user can actively pull the claws 310 apart, thereby enlarging the opening 321 and making it easier for the user to separate the handle 11a from the clamping member 300. This design makes the disassembly process easier and ensures that the handle 11a and the clamping member 300 remain firmly connected during normal use.

[0058] This design has dual advantages: on the one hand, the friction elastic member 330 does not interfere with the installation during the clamping process, which simplifies the operation; on the other hand, during the use of the device, the friction elastic member 330 effectively enhances the connection strength between the clamping member 300 and the handle 11a, reducing the risk of separation.

[0059] According to an alternative embodiment, referring to Figure 6 、 Figure 8The side wall of the regulating tube 100 is provided with a notch 120, and an elastic hose 130 is provided on the outer shell of the regulating tube 100. The elastic hose 130 covers the notch 120, and the elastic hose 130 forms an elastic area 110 at the notch 120. The elastic hose 130 covers the notch 120, and the elastic properties of the elastic hose 130 enable this area to deform under the action of external force, thereby allowing other areas of the regulating tube 100 to remain unchanged. Specifically, when the elastic area 110 is pressed, the elasticity of the elastic hose 130 causes the notch 120 to be concave toward the inside of the regulating tube 100, while other areas are not affected. This design effectively avoids the problem of bending or other deformation of the regulating tube 100 during the pressing process, and prevents stones or other foreign objects from being stuck in the bent position.

[0060] This design allows the adjustment tube 100 to provide more stable support during operation. Even if there are obstacles such as stones, the adjustment tube 100 can still maintain sufficient space for them to pass through, reducing the risk of stone jamming and thus improving the reliability and service life of the device.

[0061] The advantage of this structure is that it can not only enhance the elasticity and adaptability of the regulating tube 100 and reduce damage caused by external forces, but also provide additional support force when adjusting the flow area of the regulating tube 100, which is beneficial to avoid sticking and ensure the smooth flow of fluid or material, thereby improving the stability and efficiency of the overall system.

[0062] For example, in actual use, the regulating tube 100 is connected to another elastic hose 130 to collect and process the liquid in the reflux channel. Specifically, the operator can install the elastic hose 130 at the reflux connector 12 of the regulating tube 100 as needed, and then guide the liquid to a designated collection or processing container through the elastic hose 130.

[0063] In other words, in actual use, it is sufficient to connect the regulating tube 100 with the notch 120 at the return connection 12. To discharge the cleaning fluid into a designated container, the operator simply installs the elastic hose 130 at the return connection 12 of the regulating tube 100. Installing the elastic hose 130 ensures that the notch 120 is completely covered, thereby forming the elastic region 110.

[0064] The advantage of this design is that, after installing the elastic hose 130, the elastic region 110 can be deformed by external forces without affecting the shape of other areas of the regulating tube 100. This ensures that the regulating tube 100 remains stable during normal operation, while the elastic hose 130 effectively protects the regulating tube 100 from deformation or bending during the cleaning fluid discharge process. Furthermore, even with the elastic hose 130 installed, the structure of the regulating tube 100 still provides sufficient support, ensuring smooth flow and discharge of liquid into the container without clogging or jamming.

[0065] According to an alternative embodiment, referring to Figure 7 、 Figure 8 The regulating tube 100 is provided with a fixing member 140, which is used to seal the end of the elastic hose 130 to the regulating tube 100. The purpose of this design is to prevent the elastic hose 130 from deforming when the elastic area 110 is pressed, especially to prevent the end of the elastic hose 130 from tilting or loosening, which may cause liquid leakage.

[0066] By securing the ends of the elastic hose 130 with the fixings 140, the connection between the elastic hose 130 and the regulating tube 100 remains sealed. This fixing design effectively prevents deformation of the elastic region 110 during operation, which could lead to loosening or warping of the hose connection, thereby reducing the risk of liquid leakage. The use of fixings 140 ensures the stability and sealing of the ends of the elastic hose 130, ensuring smooth and leak-free flow of liquid.

[0067] According to an optional embodiment, the fixing member 140 includes a deformable portion 141 disposed on the adjusting tube 100. The deformable portion 141 surrounds the adjusting tube 100 to form a deformable space 142, with the end of the elastic hose 130 positioned within the deformable space 142. A pushing portion 143 is threadedly connected to the adjusting tube 100. When the pushing portion 143 is threadedly rotated relative to the adjusting tube 100, it can move axially along the adjusting tube 100, deforming the deformable portion 141 and reducing the deformable space 142, thereby clamping the elastic hose 130 between the deformable portion 141 and the adjusting tube 100.

[0068] In this embodiment, a pusher 143 is threadedly connected to the adjustment tube 100. When the pusher 143 is threadedly rotated relative to the adjustment tube 100, it can move axially along the adjustment tube 100. As the pusher 143 moves axially, the deformable portion 141 deforms, thereby reducing the deformation space 142. As the deformation space 142 decreases, the end of the elastic hose 130 is clamped between the deformable portion 141 and the adjustment tube 100, ensuring a secure connection of the elastic hose 130.

[0069] The advantage of this design is that the deformable portion 141 can be adjusted by simply rotating the pusher 143, thereby precisely clamping the end of the elastic hose 130. This clamping structure effectively prevents the hose from loosening or leaking due to external forces or deformation, thereby improving the system's sealing and stability. The provision of the pusher 143 makes the fixing process more convenient, allowing the operator to easily adjust the position of the deformable portion 141 to achieve a secure fixation of the elastic hose 130.

[0070] According to an alternative embodiment, referring to Figure 5 、 Figure 7 The pressing member 200 is movably connected to the force-applying member 400. A restoring elastic member is disposed between the pressing member 200 and the force-applying member 400 to restore the force-applying member 400 to its initial position after the external force is released. When the pressing member 200 moves toward the elastic region 110, the force-applying member 400 can push the elastic region 110 to elastically deform. During the process of pushing the elastic region 110 to elastically deform, the force-applying member 400 can move relative to the pressing member 200 to change the contact position between the force-applying member 400 and the elastic region 110.

[0071] Specifically, when the pressing member 200 drives the force-applying member 400 toward the elastic region 110, the force-applying member 400 contacts the elastic region 110 and slides along the surface of the elastic region 110 after contact, thereby gradually causing the elastic region 110 to deform evenly. This deformation process is equivalent to pushing the elastic region 110 from one side to the other, gradually deforming it during the pushing process. This ensures that the deformation of the elastic region 110 is more uniform, avoids localized excessive deformation, and improves the service life and durability of the elastic region 110.

[0072] For example, when the pressing member 200 approaches the elastic region 110, the force applying member 400 contacts the elastic region 110, causing the contact portion to slide away from the return connector 12, thereby pushing stones and other substances within the regulating tube 100. This design effectively prevents stones from getting stuck, improving the fluidity and working efficiency of the device.

[0073] The advantage of this design is that it can not only evenly promote the deformation of the elastic area 110 and improve the life of the elastic area 110, but also effectively avoid the blockage of stones or other substances through the sliding action of the force-applying member 400, thereby ensuring the continuous and stable operation of the system.

[0074] For example, the restoring elastic member is a torsion spring disposed between the pressing member 200 and the force-applying member 400. The force-applying member 400 is hinged to the pressing member 200, and the pressing member 200 is hinged to the clamping member 300. This structural design allows the force-applying member 400 to return to its initial position under the elastic force of the torsion spring when no external force is applied. This ensures that the force-applying member 400 does not continue to apply pressure to the elastic region 110 after the pressure is released, thereby preventing the elastic region 110 from being subjected to long-term stress and causing performance degradation.

[0075] Specifically, when the operator presses the pressing member 200, the force-applying member 400 rotates about the hinge point and, through rollers or sliding contact, deforms the elastic region 110 to adjust the flow rate in the reflux channel. When the external force is released, the restoring force generated by the torsion spring returns the force-applying member 400 to its initial position, simultaneously driving the pressing member 200 back to its original position. This causes the deformation of the elastic region 110 to disappear, restoring the original flow state.

[0076] Furthermore, because the pressing member 200 is hingedly connected to the clamping member 300, it provides stable support during operation and allows for more controlled movement of the pressing member 200, preventing the force-applying member 400 from shifting or changing angles during the pressing process, which could affect the accuracy of flow regulation. This design not only ensures operational stability but also improves the controllability and repeatability of reflux channel regulation, thereby enhancing the device's ease of use and reliability.

[0077] According to an alternative embodiment, referring to Figure 8 、 Figure 9 The regulating tube 100 is provided with an abutment portion 150. When the force-applying member 400 contacts the elastic region 110 and moves relative to the pressing member 200, the force-applying member 400 contacts the abutment portion 150, thereby limiting the range of motion of the force-applying member 400. The abutment portion 150 effectively limits the movement of the force-applying member 400, thereby preventing the flow area of the regulating tube 100 from being too small and ensuring that the operator feels comfortable when gripping the handle 11a and pressing member 200.

[0078] Specifically, once the force-applying member 400 contacts the abutment portion 150, the operator is unable to further move the pressing member 200 relative to the handle 11a. This design allows the operator to fully tighten their hand, and after tightening, there is no need to worry about unexpected changes in the flow rate. In this way, the abutment portion 150 not only effectively avoids the risk of the regulating tube 100 having an undersized flow area, but also ensures the stability and comfort of the pressing member 200 during operation, providing a simple and efficient operating experience.

[0079] The advantage of this design is that by limiting the range of motion of the force-applying member 400, it avoids instability caused by excessive or insufficient deformation of the adjustment tube 100 during operation. It also allows the operator to make adjustments with natural hand movements, reducing hand fatigue and ensuring that the flow area is not affected by misoperation during use, thereby improving device reliability and ease of operation.

[0080] According to an alternative embodiment, referring to Figure 5 、 Figure 7 The force-applying member 400 is provided with a roller 410 at the position where it contacts the elastic region 110. When the force-applying member 400 moves relative to the pressing member 200 and contacts the elastic region 110, the roller 410 can roll on the surface of the elastic region 110. This design can reduce the frictional resistance between the force-applying member 400 and the elastic region 110 during the deformation process, making the deformation of the elastic region 110 more uniform and reducing the risk of damage to the elastic region 110 due to localized stress concentration.

[0081] Specifically, as the force-applying member 400 pushes the pressing member 200 toward the elastic region 110, the roller 410 first contacts the elastic region 110 and, as the pressing member 200 moves further, rolls on the surface of the elastic region 110. Because the rolling friction of the roller 410 is much lower than the sliding friction, it effectively reduces frictional losses caused by the force-applying member 400 on the elastic region 110, preventing wear on the elastic region 110 caused by prolonged operation. Furthermore, the contact pattern between the roller 410 and the elastic region 110 is an arc-shaped contact. Compared to traditional planar contact, this structure disperses contact pressure and further reduces damage to the elastic region 110.

[0082] Furthermore, the design of the roller 410 structure not only enhances the durability of the device but also improves the feel of use. During operation, due to the rolling characteristics of the roller 410, the force-applying member 400 does not experience noticeable sluggishness when pushing the elastic region 110 to deform, making the pressing operation smoother and improving the overall operating experience.

[0083] The second aspect of this embodiment provides a detailed description of an introducer sheath.

[0084] Reference Figure 4 、 Figure 5 A guide sheath includes a pressing assembly according to the above embodiment. The guide sheath 10 includes a sheath tube 11 and a return connector 12. The sheath tube 11 includes a handle 11a. The adjustment tube 100 is mounted on the return connector 12, and the pressing member 200 is mounted on the handle 11a. This provides the guide sheath 10 with the benefits of the above-described pressing assembly, which will not be further described here.

[0085] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A pressing assembly, applied to a guide sheath (10), wherein the guide sheath (10) comprises a sheath tube (11) and a return connector (12), characterized in that: The pressing component includes: A regulating tube (100) is connected to the return joint (12), the regulating tube (100) being provided with an elastic region (110), the elastic region (110) being elastically deformable under the action of an external force to adjust the flow area of the return joint (12); wherein a notch (120) is provided on a side wall of the regulating tube (100), an elastic hose (130) is provided on the outer sleeve of the regulating tube (100), the elastic hose (130) covering the notch (120), and the elastic hose (130) forming the elastic region (110) at the notch (120); and The pressing member (200) is arranged on the sheath tube (11), and the pressing member (200) can move relative to the sheath tube (11) to approach or move away from the elastic region (110), thereby pushing the elastic region (110) to undergo elastic deformation.

2. A pressing assembly according to claim 1, characterized in that: The pressing assembly further comprises a clamping member (300), wherein the clamping member (300) is used for being detachably connected to the sheath tube (11), and the pressing member (200) is movably connected to the clamping member (300).

3. A pressing assembly according to claim 2, characterized in that: The clamping member (300) includes an elastic clamping claw (310), the clamping claw (310) is formed with a clamping groove (320), and the clamping groove (320) has an opening (321). The clamping claw (310) can be elastically deformed under the action of an external force so that the sheath tube (11) can enter the interior of the clamping groove (320) through the opening (321). The clamping claw (310) can limit the sheath tube (11) in the clamping groove (320).

4. The pressing assembly according to claim 3, characterized in that: The clamping claw (310) is provided with a guiding portion (311), and the guiding portion (311) is located at the opening (321) to guide the sheath tube (11) into the clamping groove (320); And / or, a friction elastic member (330) is provided on the inner wall of the clamping groove (320), and the friction elastic member (330) is located at the opening (321). When the sheath tube (11) is located in the clamping groove (320), the friction elastic member (330) abuts against the sheath tube (11).

5. The pressing assembly according to claim 4, characterized in that: A fixing member (140) is provided on the regulating tube (100), and the fixing member (140) is used to seal and connect the end of the elastic hose (130) to the regulating tube (100).

6. The pressing assembly according to claim 5, characterized in that: The fixing member (140) comprises a deformation portion (141) provided on the regulating tube (100), the deformation portion (141) forms a deformation space (142) around the regulating tube (100), and the end portion of the elastic hose (130) is located in the deformation space (142); The adjusting tube (100) is threadedly connected to a pushing portion (143). When the pushing portion (143) is threadedly rotated relative to the adjusting tube (100), it can move axially along the adjusting tube (100), thereby deforming the deforming portion (141) and reducing the deformation space (142), thereby clamping the elastic hose (130) between the deforming portion (141) and the adjusting tube (100).

7. A pressing assembly according to claim 1 or 5, characterized in that: The pressing member (200) is movably connected to a force-applying member (400), and a restoring elastic member is provided between the pressing member (200) and the force-applying member (400) so as to enable the force-applying member (400) to return to its initial position after the external force is released; When the pressing member (200) moves toward the elastic region (110), the force applying member (400) can push the elastic region (110) to undergo elastic deformation; During the process of the force-applying member (400) pushing the elastic region (110) to undergo elastic deformation, the force-applying member (400) can move relative to the pressing member (200) to change the contact position between the force-applying member (400) and the elastic region (110).

8. The pressing assembly according to claim 7, characterized in that: The regulating tube (100) is provided with an abutment portion (150), and when the force-applying member (400) contacts the elastic region (110) and moves relative to the pressing member (200), the force-applying member (400) can contact the abutment portion (150) to limit the range of movement of the force-applying member (400); And / or, the force-applying member (400) is provided with a roller (410) at a position in contact with the elastic region (110), and when the force-applying member (400) moves relative to the pressing member (200) and contacts the elastic region (110), the roller (410) can roll on the surface of the elastic region (110).

9. A guide sheath, characterized in that: The invention comprises the pressing assembly according to any one of claims 1 to 8.

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