Pressing assembly and guiding sheath

Abstract

The invention provides a pressing assembly and a guide sheath, and relates to the technical field of medical instruments.The pressing assembly comprises an adjusting pipe connected to a backflow connector, the adjusting pipe is provided with an elastic area, and the elastic area can elastically deform under the action of external force so as to adjust the circulation area of the backflow connector; and the pressing piece is arranged on the sheath tube, and the pressing piece can move relative to the sheath tube so as to be close to or far away from the elastic area, so that the elastic area is pushed to generate elastic deformation. By controlling the deformation quantity of the elastic area, the flow of the backflow channel is adjusted, and the flushing process is more controllable. According to the invention, the fluctuation of in-vivo pressure can be reduced to a certain extent, the potential injury risk to tissues is reduced, meanwhile, the gravel flushing and discharging effects are improved, and the safety and stability of medical operation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a pressing component and a guiding sheath. Background Art

[0002] A guiding sheath is a medical device that plays an auxiliary role during endoscopic examinations and treatments. It is usually made of flexible materials and has sufficient stiffness to ensure stability during operation. The guiding sheath is used in conjunction with an endoscope. By inserting the guiding sheath into the body cavity, it provides a stable guiding channel for the endoscope. When in use, the endoscope is inserted into the patient's body through the guiding sheath. Doctors can observe the internal structure with the help of the endoscope and perform sampling or other treatment operations through the guiding sheath.

[0003] After the endoscope is inserted into the guiding sheath, a reflux channel is formed between the guiding sheath and the endoscope. The guiding sheath is connected to a negative pressure suction device. Through this reflux channel, the negative pressure suction device can extract body fluids. In some surgeries, doctors inject flushing fluid through the instrument tube of the endoscope, and the flushing fluid is aspirated to the outside through the reflux channel. However, during the body fluid reflux process, since foreign objects such as stones may enter the reflux channel in the body, it may cause blockage of the channel or affect its fluidity. Such blockage or poor fluidity will cause local pressure fluctuations, which may in turn cause discomfort or damage to the fragile internal tissues. Summary of the Invention

[0004] To solve the above problems, the present application provides a pressing component and a guiding sheath.

[0005] In a first aspect, the present application provides a pressing component, adopting the following technical solution: A pressing component is applied to a guiding sheath. The guiding sheath includes a sheath tube and a reflux joint. The pressing component includes: An adjustment tube is connected to the reflux joint. The adjustment tube is provided with an elastic region, and the elastic region can undergo elastic deformation under an external force to adjust the flow area of the reflux joint; And a pressing member is disposed on the sheath tube. The pressing member 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.

[0006] In a second aspect, the present application provides a guiding sheath, adopting the following technical solution: A guiding sheath includes the pressing component described in the above technical solution.

[0007] The present invention has the following advantages and beneficial effects: In this application, an adjustment tube is connected to the reflux joint, and a pressing member acts on the elastic region of the adjustment tube, causing the elastic region to undergo elastic deformation under the action of an external force, thereby changing the flow area of the adjustment tube, and further regulating the flow rate of the reflux joint, so as to realize the dynamic adjustment of the pressure in the reflux channel.

[0008] During the negative pressure suction process, as the pressure inside the reflux channel decreases, the pressing member can be pressed to make the elastic region concave into the adjustment tube, thereby reducing the flow area of the adjustment tube and decreasing the flow rate. The decrease in the flow rate helps to inhibit the further decrease in the pressure in the reflux channel, causing the pressure to gradually rise back to a reasonable range, avoiding excessive negative pressure acting on the internal tissues of the body, and reducing the risk of damage to vulnerable tissues. On the contrary, when the pressure inside the reflux channel rises, the pressing member is gradually released, and the elastic region rebounds under its own elastic action, increasing the flow area, and further increasing the flow rate, prompting the pressure in the reflux channel to decrease, so as to maintain the pressure inside the reflux channel within an appropriate range and improve the stability of negative pressure control.

[0009] In addition, this application can also control the flow rate of the liquid in the reflux channel by adjusting the flow area of the adjustment tube to optimize the flushing effect of the calculus. During the process of discharging the calculus through the reflux channel, the pressing member can be pressed periodically to make the flow rate of the liquid in the reflux channel change periodically. When the flow rate is relatively fast, the liquid exerts a greater impact force on the calculus, which helps to push the calculus out along the reflux channel; when the flow rate decreases, the fluid pressure in the local area fluctuates, which can disturb or loosen the calculus attached to the channel wall, thereby improving the calculus removal efficiency. In this way, the retention of the calculus in the operation area can be effectively reduced, making the calculus easier to be discharged with the fluid, thereby shortening the operation time, reducing the risk and discomfort of the patient during the operation, and improving the safety and stability of the medical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 is a schematic structural diagram of the pressing assembly in the embodiment of this application; Figure 2 is a front view of the pressing assembly in the embodiment of this application; Figure 3 is a partial schematic structural diagram of the pressing assembly in the embodiment of this application; Figure 4 is a first schematic diagram of the embodiment of this application; Figure 5 is the second schematic diagram of an embodiment of the present application; Figure 6 is a cross-sectional view of an embodiment of the present application; Figure 7 is Figure 6 an enlarged structural schematic diagram of portion A in Figure 8 is the structural schematic diagram of the first part of an embodiment of the present application; Figure 9 is the structural schematic diagram of the second part of an embodiment of the present application.

[0012] The markings in the figure are: 10. guiding sheath; 11. sheath tube; 11a. handle; 12. return joint; 100. adjusting tube; 110. elastic region; 120. notch; 130. elastic hose; 140. fixing member; 141. deformation portion; 142. deformation space; 143. pushing portion; 150. abutting portion; 200. pressing member; 300. clamping member; 310. clamping claw; 311. guiding portion; 320. clamping groove; 321. opening; 330. friction elastic member; 400. force applying member; 410. roller. Detailed implementation manners

[0013] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0014] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0015] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative distances of each component from the user in the usage environment. Among them, 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".

[0016] In the lithotripsy surgery of the urinary system, the endoscope enters the renal pelvis through the guiding sheath. After using the laser to break up the stones, the flushing fluid and the crushed stones are discharged through the reflux channel formed between the endoscope and the guiding sheath. However, the inventor found that during the actual operation, the axial movement of the endoscope relative to the guiding sheath will cause the flow area of the reflux channel to change. At the same time, the crushed stones are prone to stay in the reflux channel during flushing, reducing the local flow cross-section. With a constant flushing fluid flow rate, the internal liquid pressure in the body increases, thereby increasing the risk of tissue damage. In addition, when the retained crushed stones are suddenly flushed out, the flow area of the reflux channel instantaneously increases, resulting in a sudden drop in the internal liquid pressure in the body, which may also cause tissue damage and affect the safety and stability of the surgery.

[0017] To solve the above problems, the present invention provides a pressing assembly. By pressing the pressing member, the elastic region of the adjusting tube is deformed, thereby dynamically adjusting the flow area of the adjusting tube, and then changing the flow rate of the reflux channel to achieve real-time regulation of the flow rate of the reflux channel. Specifically, during the negative pressure suction process, when the pressure in the reflux channel drops, pressing the pressing member can cause the elastic region to sink inward, thereby reducing the flow area of the adjusting tube and reducing the flushing fluid flow rate, so that the pressure rises to a reasonable range; when the pressure in the reflux channel rises, releasing the pressing member reduces the deformation amount of the elastic region, and then increases the flow area of the adjusting tube and increases the flow rate, so that the pressure in the reflux channel is reduced to an appropriate range. In this way, it is possible to effectively maintain the dynamic balance of the internal pressure of the reflux channel and reduce the damage to the internal tissues caused by the drastic pressure fluctuations.

[0018] The following combines the attached Figures 1 to 9 , and through specific embodiments and their application scenarios, a pressing assembly and a guiding sheath provided by the present application are described in detail.

[0019] The first aspect of this embodiment details a pressing assembly.

[0020] Referring to Figure 4 、 Figure 5 , the embodiment of the present application discloses a pressing assembly applied to the guiding sheath 10. Exemplarily, the pressing assembly is detachably connected to the guiding sheath 10. For example, the pressing assembly can be connected to the guiding sheath 10 by means of snap connection or threaded connection to achieve convenient disassembly and assembly and improve the adaptability. In some solutions, the pressing assembly is integrally connected to the guiding sheath 10. For example, the pressing assembly can be connected to the guiding sheath 10 by fixed connection methods such as welding and bonding to enhance the structural stability and reduce possible connection loosening problems.

[0021] In some solutions, the guiding sheath 10 includes a sheath tube 11 and a reflux joint 12. The sheath tube 11 is provided with a handle 11a for an operator to hold and control the operation of the guiding sheath 10. The pressing assembly includes an adjusting tube 100 and a pressing member 200. The adjusting tube 100 is a hollow tubular structure with openings 321 at both ends and is connected to the reflux joint 12. In certain embodiments, the adjusting tube 100 can be integrally formed with the reflux joint 12 or can be detachably connected, such as by threaded connection, snap connection, or socket connection, etc., to facilitate disassembly, assembly, and replacement.

[0022] An elastic region 110 is provided on the side wall portion of the adjusting tube 100, that is, a partial side wall of the adjusting tube 100 is composed of an elastic structure, enabling it to deform under an external force. Specifically, when a pressing force is applied to the elastic region 110, the elastic region 110 will sink inwardly into the adjusting tube 100, thereby partially occupying the flow passage of the adjusting tube 100 and reducing its flow area. On the contrary, when the pressing force is removed, the elastic region 110 rebounds to its original shape under the action of its own elastic restoring force, increasing the flow area of the adjusting tube 100 to restore the smoothness of the fluid passage.

[0023] Exemplarily, the elastic region 110 is made of an elastic material. For example, rubber, silica gel, or other polymer materials with excellent elastic properties can be used. The elastic region 110 can be integrally formed with the adjusting tube 100 or can be fixed to the adjusting tube 100 by means such as welding, bonding, or socket connection to meet different manufacturing and assembly requirements.

[0024] In some solutions, referring to Figure 4 、 Figure 5 , the pressing member 200 is arranged on the sheath tube 11. 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 structure similar to scissors, facilitating an operator to hold and control. When the operator holds the handle 11a and presses the pressing member 200, the pressing member 200 moves towards the elastic region 110 and applies a pressure, causing the elastic region 110 to deform inwardly into the adjusting tube 100, thereby reducing the flow area of the adjusting tube 100. On the contrary, when the force applied on the handle 11a is released, the pressing member 200 resets, and the elastic region 110 restores its original shape under the action of its own elastic force, increasing the flow area of the adjusting tube 100 to restore the smoothness of the fluid passage.

[0025] The design of the handle 11a-shaped structure of this pair of scissors has significant advantages in terms of operation method. First of all, the design of the handle 11a-shaped structure of the scissors conforms to ergonomics, and the operator can naturally control the movement of the pressing member 200 through the clamping and opening actions of the fingers. Compared with the traditional knob adjustment or push-pull adjustment methods, this design reduces complex rotational or sliding operations, making the adjustment process more intuitive and labor-saving. Secondly, the handle 11a-shaped structure of the scissors makes the force application direction more in line with the operation intuition. After the operator holds the handle 11a, the pressing force of the fingers can be amplified through the lever effect, so that the pressing member 200 can still apply a stable pressure to the elastic area 110 with a relatively small hand force application. This structure not only reduces the fatigue of the operator, but also improves the stability of the adjustment, avoiding misadjustment caused by hand tremors.

[0026] In actual use, the operator can achieve fine control of the flow area of the regulating tube 100 by gripping or loosening the hand to different degrees. For example, when it is necessary to reduce the flow rate, the operator can increase the gripping force, causing the elastic area 110 to bulge into the regulating tube 100, thereby reducing the flow area of the regulating tube 100, decreasing the fluid throughput, and inhibiting the further drop in pressure in the reflux channel. When it is necessary to increase the flow rate, the gripping force can be appropriately relaxed, causing the pressing member 200 to move away from the handle 11a, reducing the height of the elastic area 110 bulging into the regulating tube 100, increasing its flow area, thereby enhancing 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 adjustment of the reflux channel more accurate.

[0027] In addition, this structural design also improves the gripping comfort of the handle 11a. Since the traditional handle 11a may be relatively single and not easy to adapt to the hand shapes of different operators, the scissors-shaped structure provides a more flexible gripping method, enabling operators with different hand sizes to operate comfortably. At the same time, this structure can reduce the burden during single-handed operation, making the operation more stable and improving the accuracy of intraoperative control.

[0028] In actual use, the regulation function of the pressing member 200 can stabilize the pressure in the reflux channel and reduce tissue damage caused by sudden flow rate changes. When the pressure in the reflux channel drops, pressing the pressing member 200 can further reduce the flow area, thereby inhibiting excessive reduction of the negative pressure, maintaining the body fluid pressure within a reasonable range, and avoiding tissue adsorption damage caused by excessive negative pressure. On the contrary, when the pressure in the reflux channel rises, gradually release the pressing member 200 to increase the flow area, so as to accelerate the fluid discharge rate, thereby reducing the local pressure and reducing the impact on tissues caused by sudden pressure increase.

[0029] In addition, the regulation function of the pressing member 200 can also optimize the flushing effect of the crushed stones. By periodically pressing and releasing the pressing member 200, a dynamic change in the flow rate can be formed, improving the removal efficiency of the crushed stones. When the flow rate is relatively fast, the flushing liquid can enhance the driving effect on the crushed stones and increase the discharge speed; when the flow rate decreases, the pressure fluctuation can prompt the retained crushed stones to loosen or detach, improving the thoroughness of the crushed stone removal. This not only improves the surgical cleaning efficiency but also reduces the retention time of the crushed stones, thereby reducing the surgical risk and enhancing the stability of intraoperative control.

[0030] According to an optional embodiment, referring to Figure 1 、 Figure 4 , the pressing assembly further includes a clamping member 300 for detachably connecting with 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, enhancing the flexibility of the device.

[0031] Since the pressing assembly can be disassembled and assembled with the sheath tube 11 without damage through the clamping member 300, the pressing assembly has high reusability, thereby reducing the waste of consumables during use and lowering the surgical cost. In addition, the detachable design of the pressing assembly also supports replacing the pressing member 200 with different specifications according to the hand sizes 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 operation convenience of the pressing assembly but also reduces the use cost and enhances the comfort of the operator and the surgical control accuracy.

[0032] Exemplarily, the clamping member 300 adopts a magnetic structure, with a magnetic element arranged inside the clamping member 300 and a magnetic adsorption block provided at the corresponding position on the sheath tube 11, enabling the pressing assembly to be magnetically adsorbed to the sheath tube 11 and achieve fixation. The pressing assembly can be finely adjusted by rotating or sliding to adapt to different operation angles.

[0033] In another solution, the clamping member 300 is threadedly connected to the sheath tube 11, with an external thread provided at the end of the clamping member 300 and a corresponding internal thread provided on the sheath tube 11, enabling the clamping member 300 to be fixed on the sheath tube 11 by screwing. Through the threaded connection, the pressing assembly can achieve reliable fixation and is applicable to usage scenarios requiring high stability.

[0034] In another solution, the clamping member 300 includes a button locking mechanism, and the button locking mechanism includes a spring lock pin structure. When the pressing assembly is installed, the spring lock pin automatically snaps into the locking groove on the sheath tube 11 to keep the pressing assembly in a fixed state. When disassembly is required, the unlocking button can be pressed to make the spring lock pin disengage from the locking groove, thereby releasing the pressing assembly for easy replacement or adjustment.

[0035] According to an alternative embodiment, with reference to Figure 2 and Figure 4 , the snap - fitting member 300 includes an elastic claw 310. The claw 310 is formed with a snap - fitting groove 320. The snap - fitting groove 320 has an opening 321. The claw 310 can undergo elastic deformation under an external force, so that the sheath 11 can enter the inside of the snap - fitting groove 320 through the opening 321, and the claw 310 can limit the sheath 11 within the snap - fitting groove 320. Specifically, the claw 310 undergoes elastic deformation under an external force, allowing the sheath 11 to enter the inside of the snap - fitting groove 320 through the opening 321. After the claw 310 returns to its original state, it can limit the sheath 11, enabling the sheath 11 to maintain a stable position within the snap - fitting groove 320.

[0036] This structure has significant advantages during installation. First, due to the elastic characteristics of the claw 310, the sheath 11 can smoothly enter the snap - fitting groove 320 through the opening 321, reducing the operational complexity during installation, thereby increasing the installation speed. After installation, the limiting function of the claw 310 can effectively control the direction of the sheath 11, avoiding the situation where the pressing member 200 is not opposite to the elastic region 110 due to improper installation. Specifically, the design of the claw 310 and the snap - fitting groove 320 makes the sheath 11 more stable and controlled in the direction of the pressing member 200, contributing to improving the reliability and accuracy of the device during use.

[0037] According to an alternative embodiment, with reference to Figure 3 and Figure 4 , the claw 310 is provided with a guiding portion 311. The guiding portion 311 is located at the opening 321 to guide the sheath 11 into the snap - fitting groove 320. By providing the guiding portion 311 to guide the sheath 11 or the handle 11a smoothly into the snap - fitting groove 320. Specifically, the guiding portion 311 is located at the opening 321 of the snap - fitting groove 320. Its main function is to ensure that the handle 11a can smoothly enter the snap - fitting groove 320 when connecting to the snap - fitting member 300. With this structure, when connecting the snap - fitting member 300 to the handle 11a, the user only needs to orient the opening 321 towards the handle 11a, the handle 11a abuts against the opening 321, and press the snap - fitting member 300. At this time, the design of the guiding portion 311 can effectively guide the claw 310 to gradually open, thereby increasing the opening 321 of the snap - fitting groove 320 and facilitating the handle 11a to smoothly enter the snap - fitting groove 320.

[0038] Once the handle 11a completely enters the snap - fitting groove 320, the claw 310 will return to its original state through its own elasticity, and the opening 321 will return to its original size, so that the snap - fitting member 300 is firmly fixed to the handle 11a. Through this elastic recovery mechanism, a stable connection is formed between the snap - fitting member 300 and the handle 11a, reducing loosening caused by external forces or other interference factors during use.

[0039] When it is necessary to separate the handle 11a from the engaging member 300, the user only needs to pull the handle 11a and the engaging member 300 in a direction away from each other. The claw 310 will open due to its elastic structure, so that the opening 321 of the engaging slot 320 increases, and the handle 11a can be disengaged from the engaging slot 320, realizing the separation of the engaging member 300 and the handle 11a.

[0040] The advantage of this design is that it provides a simple and reliable engaging method. The setting of the guiding portion 311 effectively reduces the mismatch problem between the handle 11a and the engaging slot 320, and realizes simple and rapid installation and disassembly operations through the elastic deformation of the claw 310. Through this design, the engaging member 300 can not only ensure the stability of the handle 11a in the engaging slot 320, but also be conveniently disassembled when needed, which provides convenience for the maintenance and replacement of the device.

[0041] According to an optional embodiment, referring to Figure 3 、 Figure 4 ,a friction elastic member 330 is provided on the inner wall of the engaging slot 320. The friction elastic member 330 is located at the opening 321. When the sheath 11 is located in the engaging slot 320, the friction elastic member 330 abuts against the sheath 11. Specifically, the friction elastic member 330 is provided at the opening 321 of the engaging slot 320, and when the sheath 11 is located in the engaging slot 320, contact is formed between the friction elastic member 330 and the sheath 11, thereby increasing the friction force and making the connection between the engaging member 300 and the handle 11a tighter and more stable. The friction elastic member 330 helps to prevent the accidental separation of the engaging member 300 and the handle 11a during use by providing additional friction force, thereby improving the stability of the device.

[0042] On the other hand, since the friction elastic member 330 is located on the inner wall of the engaging slot 320, its design will not interfere during the installation of the engaging member 300 to the handle 11a. During the installation process, the contact between the friction elastic member 330 and the sheath 11 is less and will not hinder the installation. After the installation is completed, when the connection between the engaging member 300 and the handle 11a is stable, the function of the friction elastic member 330 gradually plays a role, increasing the friction force between the engaging member 300 and the handle 11a, thereby effectively preventing the engaging member 300 from loosening or falling off.

[0043] During disassembly, the user can actively pull the claws 310 to separate from each other, so that the opening 321 increases, facilitating the user to separate the handle 11a from the engaging member 300. The design of this operation makes the disassembly process simpler, while ensuring the stable connection between the handle 11a and the engaging member 300 during normal use.

[0044] This design has dual advantages: on the one hand, the friction elastic member 330 does not interfere with the installation during the clamping process, simplifying 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.

[0045] According to an optional embodiment, referring to Figure 6 、 Figure 8 , a notch 120 is provided on the side wall of the adjustment tube 100. An elastic hose 130 is sleeved outside the adjustment tube 100. The elastic hose 130 covers the notch 120, and the elastic hose 130 forms an elastic region 110 at the notch 120. The elastic hose 130 covers the notch 120, and the elastic characteristic of the elastic hose 130 enables this region to deform under an external force, so that other regions of the adjustment tube 100 remain undeformed. Specifically, when pressing the elastic region 110, the elasticity of the elastic hose 130 causes the notch 120 to sink inward into the adjustment tube 100, while other regions are not affected. This design effectively avoids problems such as bending or other deformations of the adjustment tube 100 during pressing, preventing stones or other foreign objects from getting stuck at the bent position.

[0046] Through this design, the adjustment tube 100 can provide more stable support during operation. In this way, even if there are obstacles such as stones, the adjustment tube 100 can still maintain enough space for it to pass through, reducing the risk of stone jamming, thereby improving the reliability and service life of the device.

[0047] The advantages of this structure are that it can not only enhance the elasticity and adaptability of the adjustment tube 100, reduce damage caused by external forces, but also provide additional support force when adjusting the flow area of the adjustment tube 100, which is beneficial to avoiding jamming phenomena and ensuring the smooth flow of fluids or materials, thereby improving the stability and efficiency of the overall system.

[0048] Exemplarily, in actual use, the adjustment tube 100 will be sleeved with other elastic hoses 130 to collect and process the liquid in the return channel. Specifically, the operator can install the elastic hose 130 at the return joint 12 of the adjustment tube 100 according to needs, and guide the liquid to a designated collection or processing container through this elastic hose 130.

[0049] That is to say, in actual use, it is only necessary to connect the adjustment tube 100 with a notch 120 at the return joint 12. During specific use, in order to drain the cleaning liquid into a designated container, the operator only needs to install the elastic hose 130 at the return joint 12 of the adjustment tube 100. By installing the elastic hose 130, it is ensured that the notch 120 is completely covered, thereby forming the elastic region 110.

[0050] The advantage of this design is that after the elastic hose 130 is installed, the elastic region 110 can be deformed by an external force without affecting the shape of other regions of the adjustment tube 100. In this way, the adjustment tube 100 remains stable during normal operation, while the elastic hose 130 can effectively protect the adjustment tube 100 during the discharge of the cleaning liquid, avoiding deformation or bending. In addition, after the elastic hose 130 is installed, the structure of the adjustment tube 100 can still provide sufficient support to ensure the smooth flow of the liquid and its smooth discharge into the container, avoiding blockage or jamming.

[0051] According to an alternative embodiment, referring to Figure 7 、 Figure 8 , a fixing member 140 is provided on the adjustment tube 100, and the fixing member 140 is used to hermetically connect the end of the elastic hose 130 to the adjustment tube 100. The purpose of this design is to prevent the elastic hose 130 from deforming when the elastic region 110 is pressed, especially to prevent the end of the elastic hose 130 from tilting or loosening, thereby causing liquid leakage.

[0052] By fixing the end of the elastic hose 130 through the fixing member 140, it can be ensured that the connection between the elastic hose 130 and the adjustment tube 100 always remains sealed. This fixing design can effectively prevent the loosening or tilting of the hose connection caused by the deformation of the elastic region 110 during operation, thereby reducing the risk of liquid leakage. The use of the fixing member 140 ensures the stability and tightness of the end of the elastic hose 130, ensuring the smooth flow of the liquid without leakage.

[0053] According to an alternative embodiment, the fixing member 140 includes a deformation portion 141 provided on the adjustment tube 100. The deformation portion 141 forms a deformation space 142 around the adjustment tube 100, and the end of the elastic hose 130 is located within the deformation space 142. A pushing portion 143 is threadedly connected to the adjustment tube 100. When the pushing portion 143 rotates threadedly relative to the adjustment tube 100, it can move axially along the adjustment tube 100, causing the deformation portion 141 to deform and reducing the deformation space 142, thereby clamping the elastic hose 130 between the deformation portion 141 and the adjustment tube 100.

[0054] In this embodiment, a pushing portion 143 is threadedly connected to the adjustment tube 100. When the pushing portion 143 rotates threadedly relative to the adjustment tube 100, it can move axially along the adjustment tube 100. When the pushing portion 143 moves axially, the deformation portion 141 will deform, thereby reducing the deformation space 142. As the deformation space 142 decreases, the end of the elastic hose 130 is clamped between the deformation portion 141 and the adjustment tube 100, ensuring the firm connection of the elastic hose 130.

[0055] The advantage of this design is that the adjustment of the deformation part 141 can be achieved by simply rotating the pushing part 143, so as to accurately clamp the end of the elastic hose 130. This clamping structure can effectively prevent the hose from loosening or leaking due to external forces or deformation, thus improving the sealing performance and stability of the system. The setting of the pushing part 143 makes the fixing process more convenient, and the operator can easily adjust the position of the deformation part 141 to achieve firm fixation of the elastic hose 130.

[0056] According to an optional embodiment, referring to Figure 5 , Figure 7 , the pressing member 200 is movably connected with a force applying member 400, and a restoring elastic member is arranged between the pressing member 200 and the force applying member 400, so that the force applying member 400 can return to its initial position after the external force is removed. When the pressing member 200 moves towards the elastic region 110, the force applying member 400 can push the elastic region 110 to undergo elastic deformation. During the process that the force applying member 400 pushes the elastic region 110 to undergo elastic deformation, it can move relative to the pressing member 200 to change the contact position between the force applying member 400 and the elastic region 110.

[0057] Specifically, when the pressing member 200 drives the force applying member 400 to approach the elastic region 110, the force applying member 400 will contact the elastic region 110 and slide on the surface of the elastic region 110 after contact, thereby gradually pushing the elastic region 110 to undergo uniform deformation. This deformation process is equivalent to pushing the elastic region 110 from one side to the other side and gradually deforming during the pushing process, so as to ensure that the deformation of the elastic region 110 is more uniform, avoid excessive local deformation, and improve the service life and durability of the elastic region 110.

[0058] Exemplarily, when the pressing member 200 approaches the elastic region 110, after the force applying member 400 contacts the elastic region 110, it can make the contact point slide towards the side away from the return joint 12, thereby pushing substances such as stones in the adjusting pipe 100. This design effectively avoids the situation of stone jamming and improves the fluidity and working efficiency of the device.

[0059] The advantage of this design is that it can not only uniformly push the deformation of the elastic region 110 and improve the life of the elastic region 110, but also effectively avoid the blockage of stones or other substances through the sliding action of the force applying member 400, ensuring the continuous and stable operation of the system.

[0060] Exemplarily, 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. Through this structural design, when the force - applying member 400 is not under external force, it can return to its initial position under the elastic force of the torsion spring, ensuring that the force - applying member 400 will not continuously apply pressure to the elastic region 110 after the pressing is released, and avoiding the performance degradation of the elastic region 110 due to long - term stress.

[0061] Specifically, when an operator presses the pressing member 200, the force - applying member 400 rotates around the hinge point and pushes the elastic region 110 to deform by means of roller or sliding contact to adjust the flow rate of the return flow channel. After the external force is removed, the restoring force generated by the torsion spring causes the force - applying member 400 to return to its initial position, and at the same time drives the pressing member 200 to reset, so that the deformation of the elastic region 110 disappears and returns to the original flow state.

[0062] In addition, since the pressing member 200 is hinged to the clamping member 300, it can provide stable support during the operation process and make the movement direction of the pressing member 200 more controllable, avoiding the deviation or angular change of the force - applying member 400 during the pressing process and affecting the accuracy of flow rate adjustment. This design improves the controllability and repeatability of the return flow channel adjustment while ensuring the operation stability, thereby enhancing the convenience and reliability of the device.

[0063] According to an alternative embodiment, referring to Figure 8 、 Figure 9 , the adjusting pipe 100 is provided with an abutting 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 can contact the abutting portion 150 to limit the movement range of the force - applying member 400. By providing the abutting portion 150, the movement of the force - applying member 400 can be effectively restricted, thereby avoiding the situation where the flow area of the adjusting pipe 100 is too small, and at the same time ensuring the comfort of the operator when holding the handle 11a and the pressing member 200.

[0064] Specifically, after the force - applying member 400 contacts the abutting portion 150, the operator will no longer be able to drive the pressing member 200 to move relative to the handle 11a. This design enables the operator's hand movement to be fully pinched, and after pinching, there is no need to worry about accidental changes in the flow rate. In this way, the abutting portion 150 not only effectively avoids the risk of the flow area of the adjusting pipe 100 being too small, but also ensures the stability and comfort of the pressing member 200 during operation, providing a simple and efficient operation experience.

[0065] The advantage of this design is that by restricting the movement range of the force - applying member 400, it avoids the instability problems caused by excessive or insufficient deformation of the adjustment tube 100 during operation. At the same time, it also enables the operator to complete the adjustment with natural hand movements, reducing hand fatigue, and ensuring that during use, the flow area will not be affected by misoperation, thereby improving the reliability of the device and the convenience of operation.

[0066] According to an optional embodiment, referring to Figure 5 、 Figure 7 , the force - applying member 400 is provided with rollers 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 rollers 410 can roll on the surface of the elastic region 110. This design can reduce the frictional resistance between the two during the process of the force - applying member 400 pushing the elastic region 110 to deform, making the deformation of the elastic region 110 more uniform and reducing the risk of damage to the elastic region 110 due to local stress concentration.

[0067] Specifically, during the process of the force - applying member 400 pushing the pressing member 200 towards the elastic region 110, the rollers 410 will first contact the elastic region 110 and roll on the surface of the elastic region 110 as the pressing member 200 moves further. Since the rolling friction of the rollers 410 is much smaller than the sliding friction, it can effectively reduce the frictional loss of the force - applying member 400 on the elastic region 110 and avoid the wear of the elastic region 110 caused by long - term operation. At the same time, the contact form between the rollers 410 and the elastic region 110 is an arc contact. Compared with the traditional planar contact method, this structure can disperse the contact pressure and further reduce the damage to the elastic region 110.

[0068] In addition, the design of the roller 410 structure can not only improve the durability of the device but also improve the operating feel. During operation, due to the rolling characteristics of the rollers 410, there will be no obvious stalling feeling when the force - applying member 400 deforms the elastic region 110, making the pressing operation smoother and improving the overall operating experience.

[0069] The second aspect of this embodiment details a guiding sheath.

[0070] Referring to Figure 4 、 Figure 5 , a guiding sheath includes a pressing assembly of the above - mentioned embodiment. The guiding 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 installed on the return connector 12, and the pressing member 200 is installed on the handle 11a. Thus, the guiding sheath 10 has the beneficial effects of the above - mentioned pressing assembly, which will not be elaborated here.

[0071] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A pressing assembly, applied to a guide sheath (10), the guide sheath (10) comprising a sheath tube (11) and a return connector (12), characterized in that: The pressing component comprises: A regulating tube (100) connected to the reflux joint (12), the regulating tube (100) being provided with an elastic region (110), the elastic region (110) being capable of elastic deformation under the action of an external force, so as to adjust the flow area of ​​the reflux joint (12); and a pressing piece (200) disposed on the sheath tube (11); the pressing piece (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 piece (300), the clamping piece (300) being used for being detachably connected to the sheath tube (11), and the pressing piece (200) being movably connected to the clamping piece (300).

3. A pressing assembly according to claim 2, characterized in that: The clamping member (300) comprises an elastic clamping claw (310), wherein the clamping claw (310) is formed with a clamping groove (320), wherein the clamping groove (320) has an opening (321), and 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), and the clamping claw (310) can limit the sheath tube (11) to be located within the clamping groove (320).

4. A 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), and 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 1, characterized in that: The side wall of the regulating tube (100) is provided with a notch (120), and the outer shell of the regulating tube (100) is provided with an elastic hose (130), the elastic hose (130) covers the notch (120), and the elastic hose (130) forms the elastic area (110) at the notch (120).

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

7. A pressing assembly according to claim 6, characterized in that: The fixing member (140) comprises a deformation portion (141) arranged on the adjusting tube (100), the deformation portion (141) surrounds the adjusting tube (100) to form a deformation space (142), and the end of the elastic hose (130) is located in the deformation space (142); The adjusting tube (100) is threadably connected to a pushing portion (143), and when the pushing portion (143) is threadably rotated relative to the adjusting tube (100), it can move axially along the adjusting tube (100), thereby deforming the deformation portion (141) and reducing the deformation space (142), thereby clamping the elastic hose (130) between the deformation portion (141) and the adjusting tube (100).

8. A pressing assembly according to claim 1 or 6, 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 that the force applying member (400) can be restored to an 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).

9. A pressing assembly according to claim 8, 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).

10. A guide sheath, characterized in that: Includes the pressing assembly described in any one of claims 1-9.

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