A rebound structure, endoscope and insertion system

Abstract

The present invention provides a rebound structure, an endoscope and an insertion system, which relate to the field of medical devices. The present invention includes an elastic member, which is used to be arranged on a sheath and / or an insertion part. The elastic member has a first state and a second state. The elastic member can be elastically deformed from the first state to the second state when subjected to an external force; wherein, when the insertion part is located in the sheath: when the elastic member is in the first state, the elastic member can make the insertion part at least partially deviate from the central axis of the sheath; when the elastic member is in the second state, the insertion part can be located at the central axis of the sheath. Compared with the prior art, the present invention has the advantage that the elastic member can push at least part of the insertion part to deviate from the central axis of the sheath, thereby increasing the gap between the insertion part and the sheath, thereby helping to reduce the risk of blockage in the reflux channel, thereby alleviating the problem of stagnation or obstruction during the passage of stone fragments.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a rebound structure, an endoscope and an implantation system. Background Art

[0002] With the rapid development of medical technology, medical endoscopes have become an important tool for diagnosing and treating diseases of the digestive and urinary systems. Especially in the treatment of stone diseases such as kidney stones and gallstones, their application plays a key role in protecting the life and health of patients and the safety of surgery.

[0003] In urinary system lithotripsy, such as percutaneous nephrolithotomy, an endoscope is usually inserted into the renal pelvis through a sheath. After the stones are broken up by laser, the reflux channel formed by the gap between the endoscope and the sheath is needed to discharge the flushing fluid and the broken stones. However, due to the irregular shape or large size of the stone fragments, they are easily stuck in the narrow gap, causing blockage of the reflux channel. As a result, the internal pressure of the organ cannot be stabilized, the endoscope is difficult to smoothly withdraw from the sheath, and even the operation is interrupted, affecting the surgical effect and patient safety. Summary of the invention

[0004] In order to solve the above problems, the present application provides a rebound structure, an endoscope and an insertion system.

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

[0006] A resilient structure is applied to an endoscope and / or a sheath tube, wherein the endoscope comprises an insertion portion, the resilient structure comprises an elastic member, the elastic member is used to be arranged on the sheath tube and / or the insertion portion, the elastic member has a first state and a second state, and the elastic member can be elastically deformed from the first state to the second state when subjected to an external force;

[0007] Wherein, when the insertion portion is located in the sheath tube:

[0008] When the elastic member is in the first state, the elastic member can cause the insertion portion to at least partially deviate from the central axis of the sheath tube;

[0009] When the elastic member is in the second state, the insertion portion may be located at the central axis of the sheath tube.

[0010] Preferably, a front end portion is provided at the distal end of the insertion portion, and the outer diameter of the front end portion is larger than the outer diameter of the insertion portion;

[0011] The elastic member is arranged in an annular shape, and when the elastic member is in the second state, it can be sleeved on the front end portion;

[0012] When the elastic member is in the first state, the elastic member has a first annular cavity, a second annular cavity and a narrow neck, the first annular cavity and the second annular cavity are connected through the narrow neck, and the width of the narrow neck is smaller than the minimum projection width of the insertion portion.

[0013] Preferably, the sheath is provided with a blocking portion, and the elastic member is provided with a protruding portion, and when the elastic member moves along the axial direction of the sheath, the blocking portion can abut against the protruding portion to prevent the elastic member from further moving;

[0014] Alternatively, the elastic member is connected to a driving member, and the driving member is used to drive the elastic member to move along the axial direction of the endoscope, so that the elastic member moves from the front end portion to the insertion portion.

[0015] Preferably, the front end portion is provided with a limiting portion protruding radially along the front end portion, and at least a portion of the elastic member protrudes from the limiting portion in the radial direction of the front end portion;

[0016] And / or, when the elastic member is sleeved on the front end portion, at least part of the elastic member protrudes from the surface of the front end portion in the radial direction of the front end portion;

[0017] And / or, the inner wall of the elastic member is smoothly arranged.

[0018] Preferably, when the elastic member is in the first state, the elastic member forms a first recessed portion and a second recessed portion, the narrow neck is formed between the first recessed portion and the second recessed portion, and the first recessed portion and the second recessed portion are staggered and arranged on both sides of the narrow neck.

[0019] Preferably, the first annular cavity and the second annular cavity have the same shape;

[0020] And / or, the first annular cavity and the second annular cavity are consistent in size.

[0021] In a second aspect, the present application provides an endoscope, which adopts the following technical solution:

[0022] An endoscope comprises an insertion portion and a front end portion, wherein the outer diameter of the front end portion is larger than the outer diameter of the insertion portion, and the front end portion is provided with the rebound structure described in the above technical solution.

[0023] Preferably, at least two transition surfaces are provided between the front end portion and the insertion portion, and the at least two transition surfaces are arranged along the circumference of the front end portion or the insertion portion; adjacent transition surfaces have different inclination angles, and there is a smooth transition between adjacent transition surfaces; the at least two transition surfaces are respectively connected to the front end portion and the insertion portion in a smooth transition;

[0024] Alternatively, the insertion portion is eccentrically connected to the front end portion, and a smooth transition is formed between the front end portion and the insertion portion via a transition surface.

[0025] Preferably, the surface of the insertion portion is provided with marking lines, and the marking lines are distributed along the length direction of the insertion portion;

[0026] And / or, the insertion portion is provided with an abutment member, and the abutment member at least partially protrudes from the surface of the insertion portion; when the insertion portion is located in the sheath tube, the abutment member causes the insertion portion to deviate from the central axis of the sheath tube.

[0027] In a third aspect, the present application provides an implantation system, which adopts the following technical solution:

[0028] An insertion system comprises a sheath tube and the endoscope described in the above technical solution, wherein the insertion portion is located inside the sheath tube.

[0029] The present invention has the following advantages and beneficial effects:

[0030] The elastic member of the present invention is uniquely designed so that after the insertion portion enters the sheath tube, the elastic member can push at least part of the insertion portion away from the central axis of the sheath tube, thereby increasing the gap between the insertion portion and the sheath tube. In this way, the gap between the portion of the insertion portion that deviates from the central axis of the sheath tube and the sheath tube can maintain a certain width, thereby helping to reduce the risk of blockage in the reflux channel, thereby alleviating the problem of stagnation or obstruction during the passage of stone fragments.

[0031] Specifically, when the insertion part is located in the sheath, the elastic member can make the insertion part deviate from the central axis of the sheath, increasing the gap between the insertion part and the sheath. As the stone fragments pass through this gap, the increased gap helps to reduce the possibility of stone jamming, thereby improving the smoothness of the stone passing through the reflux channel and reducing the resistance during the passage. This design can improve the overall passability and safety of endoscopic surgery to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0033] Figure 1 is a schematic structural diagram of the elastic member when it is in a first state;

[0034] Figure 2 is a schematic structural diagram of the elastic member when it is in the second state;

[0035] Figure 3 is the front view of the elastic member;

[0036] Figure 4 It is a schematic diagram of the structure when the sheath, endoscope and elastic member are matched;

[0037] Figure 5 is a first cross-sectional view of the sheath, endoscope and elastic member when they are fitted together;

[0038] Figure 6 is a second cross-sectional view of the sheath, the endoscope and the elastic member when they are in combination;

[0039] Figure 7 is a first structural schematic diagram of the endoscope and the elastic member when they are matched;

[0040] Figure 8 is a second structural schematic diagram when the endoscope and the elastic member are matched;

[0041] Fig. 9 yes Figure 5 The enlarged schematic diagram of the middle A part;

[0042] Fig.10 It is a schematic diagram of the structure of the system embedded in the embodiment of the present application;

[0043] Fig.11 Schematic diagram of the structure of the sheath.

[0044] The markings in the figure are:

[0045] 10. Endoscope; 11. Insertion portion; 12. Front end portion; 12a. Limiting portion; 13. Transition surface; 14. Marking line; 15. Abutment member; 20. Sheath; 21. Blocking portion; 22. Entrance port; 100. Elastic member; 110. First annular cavity; 120. Second annular cavity; 130. First recessed portion; 140. Second recessed portion; 150. Narrow neck; 160. Raised portion. DETAILED DESCRIPTION

[0046] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0047] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0048] 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".

[0049] In urinary system lithotripsy, especially in percutaneous nephrolithotomy (PCNL), an endoscope is usually inserted into the renal pelvis through a sheath, and after the stones are broken up by laser, the flushing fluid and the broken stones are discharged through the reflux channel formed between the endoscope and the sheath. However, due to the irregular shape or large size of the stone fragments, they are easily stuck in the narrow reflux channel, causing blockage of the reflux channel and affecting the smooth progress of the operation.

[0050] One of the root causes of the problem is that the insertion part of the endoscope is long, and when the insertion part enters the sheath, it usually forms an irregular channel in the sheath. The channel width may vary in different areas, with some areas being wider and some areas being narrower. This makes it particularly easy for stone fragments to get stuck in the narrower parts when passing through these areas, thus preventing the smooth discharge of the stone fragments.

[0051] On the other hand, the size of the body cavity is limited, so the diameter of the sheath must also be strictly controlled and cannot be increased at will. In addition, in order to configure the necessary instrument tubes, lighting systems, image acquisition systems, etc., the endoscope also has certain size restrictions. In particular, the front end area of ​​the insertion part needs to accommodate complex systems such as lighting and imaging, making it difficult to further reduce the size of the front end area. However, the area outside the front end of the insertion part can actually be reduced in size, which can increase the gap between the insertion part and the sheath to a certain extent, thereby improving the passability of stone fragments.

[0052] Despite this, the problem still exists. Since the insertion part is long and needs to be fully inserted into the sheath, it is difficult to ensure the relative position of the insertion part in the sheath, especially when the insertion part is located at the central axis of the sheath, the gap between the insertion part and the sheath may still be small, resulting in insufficient passage of stone fragments. Especially when the stone is large or irregular in shape, the narrow gap can easily cause the stone to get stuck, which in turn causes blockage of the reflux channel, affecting the effect and safety of the operation.

[0053] In order to solve the above problems, the present invention provides a rebound structure. Through the rebound structure, when the insertion part enters the sheath, it can push at least part of the insertion part to deviate from the central axis of the sheath, thereby increasing the gap between the insertion part and the sheath. This structure can ensure that the gap between the insertion part and the sheath remains relatively uniform to a certain extent, thereby effectively reducing the risk of stone fragments getting stuck.

[0054] Specifically, through the rebound structure, after the insertion part enters the sheath, at least part of the insertion part can be offset to the side of the sheath, thereby increasing the permeability of the reflux channel between the insertion part and the sheath. This design not only helps to improve the permeability of stone fragments, but also effectively reduces the possibility of stone stagnation, thereby reducing the risk of reflux channel blockage and further improving the smoothness of stone discharge.

[0055] The following is combined with Figures 1 to 11 , a rebound structure, endoscope and insertion system provided by the present application are described in detail through specific embodiments and their application scenarios.

[0056] The first aspect of this embodiment describes a rebound structure in detail.

[0057] Reference Fig. 9 , Fig.10 , an embodiment of the present application provides a resilient structure, which is applied to an endoscope 10 and / or a sheath 20. Exemplarily, the endoscope 10 includes an insertion portion 11, which is used in conjunction with the sheath 20 when in use, and the insertion portion 11 is usually inserted into the sheath 20. In this structure, the resilient structure can be arranged inside the sheath 20, or on the endoscope 10, and the specific position is selected according to actual use and design requirements.

[0058] Reference Figure 8 , Fig. 9 When the insertion part 11 is inserted into the sheath tube 20, the rebound structure will be located between the endoscope 10 and the sheath tube 20, and has an elastic effect, and can push the insertion part 11 to one side of the sheath tube 20 through its own elastic recovery force or through an external trigger mechanism (such as force triggering). This structural design allows the insertion part 11 to deviate from the central axis of the sheath tube 20, thereby changing the relative position relationship between the insertion part 11 and the sheath tube 20.

[0059] Due to the offset of the insertion part 11, the gap between the insertion part 11 and the other side of the sheath tube 20 is increased, which helps to improve the smoothness of the reflux channel to a certain extent. The increased gap provides more space for the stone fragments and flushing fluid to pass through, thereby reducing the risk of stone fragments being stuck in the channel due to irregular shapes or large volumes. In other words, this offset structural design is beneficial to increasing the passability of the reflux channel and reducing the probability of the reflux channel being blocked due to stone stuck.

[0060] In some embodiments, the rebound structure can be movable relative to the sheath tube 20 and / or the endoscope 10, thereby achieving flexible adjustment of the position of the rebound structure with the sheath tube 20 and / or the endoscope 10. By connecting the rebound structure to a drive device (such as a pull rope, etc.), the relative position between the insertion portion 11 and the sheath tube 20 can be adjusted as needed, thereby optimizing the patency of the reflux channel.

[0061] The rebound structure can be set in the sheath 20 or on the insertion part 11 of the endoscope 10 according to actual needs. This design gives the structure a certain flexibility. By adjusting the relative position between the insertion part 11 and the sheath 20, the patency of the reflux channel can be further improved. This design can adapt to different medical operation needs and provide a more convenient surgical operation experience.

[0062] It is understandable that, referring to Fig.10 , Fig.11 The sheath tube 20 is a hollow tube with openings at both ends. The central axis of the sheath tube 20 refers to the geometric central axis of the internal channel of the sheath tube 20. Specifically, the rebound structure acts on the insertion part 11 to make the insertion part 11 deviate from the central axis of the sheath tube 20, so that the insertion part 11 is located on one side of the channel of the sheath tube 20. As the gap between the insertion part 11 and the other side of the sheath tube 20 increases, the passability of the reflux channel is improved, which helps to reduce the possible stagnation or blockage of stone fragments when passing through.

[0063] In some embodiments, reference Figure 1 , Figure 2 The rebound structure includes an elastic member 100, which is used to be arranged on the sheath 20 and / or the insertion part 11. The elastic member 100 has a first state and a second state. The elastic member 100 can be elastically deformed from the first state to the second state when subjected to an external force.

[0064] Among them, the first state generally refers to the initial state or preset state when the elastic member 100 is not subjected to external force, and the second state refers to the state to which the elastic member 100 is deformed after being subjected to external force. The morphological changes of the elastic member 100 in different states enable it to adjust the relative position between the insertion part 11 and the sheath tube 20 as needed, thereby affecting the patency of the reflux channel. The reflux channel refers to the gap or clearance between the insertion part 11 and the sheath tube 20, which allows flushing fluid and stone fragments to pass through. By adjusting the relative position between the insertion part 11 and the sheath tube 20 through the rebound structure, the width of this gap can be increased, thereby reducing the probability of blockage of the reflux channel.

[0065] It is understandable that when the elastic member 100 is in the second state, if the external force is removed, the elastic member 100 can be restored to the first state under the action of its own elastic force. In this process, the elastic member 100 is always within its own elastic deformation range, that is, the switch between the first state and the second state will not cause the elastic member 100 to undergo plastic deformation. Therefore, the elastic member 100 will not be permanently damaged during the deformation process, ensuring its long-term stability and reliability.

[0066] Exemplarily, the elastic member 100 is annular and is disposed in the insertion portion 11 or the sheath 20. When the insertion portion 11 is located in the sheath 20, the elastic member 100 is located between the insertion portion 11 and the sheath 20 and abuts against the sheath 20. At this time, the elastic force of the elastic member 100 will limit the position of the insertion portion 11, so that the insertion portion 11 deviates from one side of the central axis of the sheath 20. Through this design, the gap between the insertion portion 11 and the sheath 20 is increased, thereby optimizing the passability of the reflux channel.

[0067] During use, the elastic member 100 will only work after the insertion portion 11 is inserted into the sheath tube 20. In order to more clearly describe the relationship between the elastic member 100, the insertion portion 11, and the sheath tube 20, the following will focus on the state when the insertion portion 11 is located in the sheath tube 20. In this state, the elastic member 100 is located between the insertion portion 11 and the sheath tube 20, and through its elastic force, it limits the position of the insertion portion 11, so that the insertion portion 11 deviates from the central axis of the sheath tube 20, thereby increasing the gap between the insertion portion 11 and the sheath tube 20.

[0068] Reference Figure 3 , Figure 4 When the elastic member 100 is in the first state, the elastic member 100 can make the insertion portion 11 at least partially deviate from the central axis of the sheath tube 20. Specifically, under the action of the elastic member 100, the insertion portion 11 located in the area where the elastic member 100 is located will deviate to one side, thereby increasing the gap between the insertion portion 11 and the sheath tube 20 in this area. In this way, the patency of the reflux channel is improved, which helps to reduce the possibility of stone fragments being stuck or blocked.

[0069] When the elastic member 100 is in the second state, the insertion portion 11 can be located at the central axis of the sheath tube 20. At this time, the elastic member 100 has a weakened restrictive effect on the insertion portion 11 or does not restrict the insertion portion 11, and the insertion portion 11 can be freely located at the central axis or other areas of the sheath tube 20, thereby increasing the degree of freedom of the insertion portion 11 in the sheath tube 20, and facilitating the smooth insertion of the insertion portion 11 into the sheath tube 20.

[0070] According to an alternative embodiment, referring to Figure 3 , Figure 4 , the distal end of the insertion portion 11 is provided with a front end portion 12, and the outer diameter of the front end portion 12 is larger than the outer diameter of the insertion portion 11. Specifically, when the cross-sections of the insertion portion 11 and the front end portion 12 are both circular, the diameter of the insertion portion 11 is smaller than the diameter of the front end portion 12, thereby achieving a size difference between the front end portion 12 and the insertion portion 11. This design can ensure that in actual use, the front end portion 12 can provide a stronger positioning effect and sealing effect relative to the insertion portion 11.

[0071] The elastic member 100 is arranged in an annular shape, and when the elastic member 100 is in the second state, it can be sleeved on the front end portion 12. When an external force is applied to the elastic member 100, the inner diameter of the elastic member 100 can be slightly increased, exceeding the outer diameter of the front end portion 12, so that the elastic member 100 can be smoothly sleeved on the front end portion 12. Since the elastic member 100 has elastic characteristics, when the elastic member 100 is sleeved on the front end portion 12, it can be naturally clamped around the front end portion 12 by elastic force, and enter the sheath 20 together with the front end portion 12. This design can ensure that the elastic member 100 is tightly connected to the front end portion 12 during the insertion process, and at the same time has a certain stability.

[0072] Reference Figure 2 , Figure 3 When the elastic member 100 is in the first state, the elastic member 100 has a first annular cavity 110, a second annular cavity 120 and a narrow neck 150. The first annular cavity 110 and the second annular cavity 120 are connected through the narrow neck 150, and the width of the narrow neck 150 is smaller than the minimum projection width of the insertion portion 11.

[0073] Since the width of the narrow neck 150 is smaller than the minimum projection width of the insertion portion 11, it can provide a certain mechanical limiting force when the insertion portion 11 passes through. Specifically, when an external force acts on the elastic member 100, the elastic member 100 can move axially relative to the front end portion 12, especially to the insertion portion 11. Since the diameter of the insertion portion 11 is small, the elastic member 100 gradually recovers its deformation under the action of the insertion portion 11, thereby pushing the insertion portion 11 to deviate to one side of the first annular cavity 110 or the second annular cavity 120. This design enables the insertion portion 11 to be separated from the central axis of the sheath tube 20, thereby achieving precise control of the channel.

[0074] According to an alternative embodiment, referring to Figure 5 , Fig. 9 The sheath tube 20 is provided with a blocking portion 21, and the elastic member 100 is provided with a protrusion 160. When the elastic member 100 moves axially along the sheath tube 20, the blocking portion 21 can abut against the protrusion 160 to prevent the elastic member 100 from moving further. Through the action of the blocking portion 21, when the front end portion 12 pushes the elastic member 100 into the sheath tube 20, the elastic member 100 can move relative to the front end portion 12 and gradually move to the insertion portion 11. In this process, the elastic member 100 gradually restores its original shape, and pushes the insertion portion 11 to one side of the central axis of the sheath tube 20 through the elastic recovery force, ensuring that the insertion portion 11 is accurately positioned and can work in coordination with other components in the sheath tube 20.

[0075] The matching design of the blocking portion 21 and the protrusion 160 can effectively control the axial movement range of the elastic member 100. This design can also avoid potential problems caused by uncontrolled movement, such as inaccurate position of the insertion portion 11 or interference with other structures, thereby improving the stability and safety of the overall system.

[0076] In addition, according to an optional embodiment, the elastic member 100 can also be connected to a driving member (not shown in the figure), which is used to drive the elastic member 100 to move along the axial direction of the endoscope 10, and drive the elastic member 100 from the front end 12 to the insertion part 11. Specifically, the driving member can drive the elastic member 100 through an external control system to achieve precise control and positioning of the elastic member 100. Exemplarily, the driving member can be a driving rope, one end of which is connected to the elastic member 100, and the other end is located outside the sheath 20. By pulling the end of the driving rope located outside the sheath 20, the movement of the elastic member 100 can be triggered, so that it moves axially to the desired position. This design makes the operation of the elastic member 100 more flexible and controllable, and provides a more convenient and efficient solution for the precise adjustment and operation of the device.

[0077] According to an alternative embodiment, referring to Figure 6 , Figure 7The front end portion 12 is provided with a limiting portion 12a protruding in the radial direction of the front end portion 12, and at least a portion of the elastic member 100 protrudes from the limiting portion 12a in the radial direction of the front end portion 12 (refer to Figure 3 ). The design of the limiting portion 12a can effectively prevent the elastic member 100 from being detached from the distal end of the front end portion 12. Specifically, during the process of inserting the endoscope 10 into the sheath tube 20, the endoscope 10 and the sheath tube 20 may move relative to each other, causing the elastic member 100 to fall off from the distal end of the front end portion 12 due to friction or other external factors, thereby affecting the smooth flow of the internal channel of the sheath tube 20. The existence of the limiting portion 12a can prevent the elastic member 100 from being detached during this process, thereby ensuring the stability and continuity of the internal structure of the sheath tube 20.

[0078] According to an alternative embodiment, referring to Figure 7 , Figure 8 , when the elastic member 100 is sleeved on the front end portion 12, at least part of the elastic member 100 protrudes from the surface of the front end portion 12 in the radial direction of the front end portion 12. The advantage of this design is that the protruding part of the elastic member 100 can more effectively contact the blocking portion 21, thereby promoting the relative movement between the elastic member 100 and the front end portion 12.

[0079] In some embodiments, reference Figure 6 , Fig. 9 , the blocking portion 21 is arranged at the distal end of the sheath tube 20, so that the elastic member 100 is located at the distal end side of the sheath tube 20. In this case, the elastic member 100 divides the entrance of the reflux channel into multiple small openings. In this way, although the entrance of the reflux channel is divided into multiple small openings, the area of ​​each small opening is still larger than the single entrance in the traditional design. Therefore, although the design of multiple small openings can reduce the probability of larger stones entering the reflux channel and avoid the channel being blocked, the entrance of the reflux channel is still increased as a whole, thereby facilitating the passage of impurities such as stones.

[0080] It is understandable that during the use of the endoscope 10, the front end 12 will completely extend out of the sheath 20, forming the entrance of the reflux channel between the insertion portion 11 and the distal opening of the sheath 20. Since the diameter of the insertion portion 11 is small, the entrance of the reflux channel between the insertion portion 11 and the distal opening of the sheath 20 is correspondingly enlarged. Even if the entrance of the reflux channel is divided into multiple small openings by the elastic member 100, the overall entrance of the reflux channel is still enlarged compared with the prior art, so the difficulty of impurities such as stones passing through is reduced, and the overall patency is improved.

[0081] According to an optional embodiment, the inner wall of the elastic member 100 is smoothly arranged. Since the elastic member 100 needs to slide relative to the front end portion 12, the smooth inner wall design can reduce friction, making it easier for the elastic member 100 to move relative to the front end portion 12. In addition, during the deformation process of the elastic member 100, the relative movement between it and the insertion portion 11 can further reduce friction, helping the insertion portion 11 to enter the first annular cavity 110 or the second annular cavity 120 more smoothly.

[0082] According to an alternative embodiment, referring to Figure 2 , Figure 3 , when the elastic member 100 is in the first state, the elastic member 100 forms a first recessed portion 130 and a second recessed portion 140, a narrow neck 150 is formed between the first recessed portion 130 and the second recessed portion 140, and the first recessed portion 130 and the second recessed portion 140 are staggered and arranged on both sides of the narrow neck 150. Through this staggered arrangement, when the insertion portion 11 is located between the first recessed portion 130 and the second recessed portion 140, the force exerted on the insertion portion 11 will be unbalanced, so that it is easier to push the insertion portion 11 into the first annular cavity 110 or the second annular cavity 120. This design effectively avoids the situation where the insertion portion 11 is stuck at the narrow neck 150, ensuring the smooth operation of the assembly. It can be understood that the first recessed portion 130 and the second recessed portion 140 are staggered and arranged on both sides of the narrow neck 150, which means that the first recessed portion 130 and the second recessed portion 140 are not directly opposite.

[0083] According to an optional embodiment, the first annular cavity 110 and the second annular cavity 120 have the same shape. This design ensures that no matter the insertion portion 11 is located in the first annular cavity 110 or the second annular cavity 120, the insertion portion 11 is subject to a consistent limiting effect, ensuring that the insertion portion 11 deviates from the central axis of the sheath tube 20.

[0084] According to an optional embodiment, the first annular cavity 110 is the same size as the second annular cavity 120. This arrangement can ensure that the insertion portion 11 can be uniformly restricted when entering the two annular cavities, and further realize the position control of the insertion portion 11 relative to the sheath tube 20, so as to better make the insertion portion 11 deviate from the central axis of the sheath tube 20 and avoid the jamming phenomenon.

[0085] A second aspect of this embodiment describes an endoscope in detail.

[0086] Reference Figure 7 , Fig.10An endoscope comprises an insertion portion 11 and a front end portion 12, wherein the outer diameter of the front end portion 12 is larger than the outer diameter of the insertion portion 11, and the front end portion 12 is provided with the rebound structure in the above-mentioned embodiment. In this way, the endoscope 10 has the beneficial effects of the above-mentioned rebound structure, which will not be described in detail here. The rebound structure provides an effective elastic effect between the insertion portion 11 and the front end portion 12, so that during the use of the endoscope 10, at least a portion of the insertion portion 11 deviates from the central axis of the sheath tube 20, thereby forming a larger reflux channel. Through this structural setting, the patency of the reflux channel can be effectively improved, the risk of blockage can be reduced, and the operational performance of the endoscope 10 can be improved.

[0087] The endoscope 10 referred to in the embodiment of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not impose any specific restrictions on the type of the endoscope 10.

[0088] According to an alternative embodiment, referring to Figure 7 , Figure 8 At least two transition surfaces 13 are provided between the front end portion 12 and the insertion portion 11, and the at least two transition surfaces 13 are arranged along the circumference of the front end portion 12 or the insertion portion 11; adjacent transition surfaces 13 have different inclination angles, and the adjacent transition surfaces 13 have a smooth transition. At least two transition surfaces 13 are smoothly transitioned and connected with the front end portion 12 and the insertion portion 11, respectively. By providing at least two transition surfaces 13 with different inclination angles, the elastic member 100 can be selectively deflected to one side under the guidance of the transition surface 13 during the sliding process to the insertion portion 11, so that the insertion portion 11 can enter the first annular cavity 110 or the second annular cavity 120 in a controlled manner. In this way, it can be predicted whether the insertion portion 11 will enter the first annular cavity 110 or the second annular cavity 120, which helps to accurately control the position of the reflux channel in the sheath tube 20, improve the controllability of the operation and the use efficiency of the reflux channel.

[0089] According to an alternative embodiment, referring to Figure 6 , Figure 7 The insertion portion 11 is eccentrically connected to the front end portion 12, and the front end portion 12 and the insertion portion 11 smoothly transition through the transition surface 13. Through the eccentric connection between the insertion portion 11 and the front end portion 12, the shape of the transition surface 13 can be controlled, so that the insertion portion 11 has controllability in the process of entering the first annular cavity 110 or the second annular cavity 120. In other words, according to the design of the transition surface 13, it is possible to predetermine which annular cavity the insertion portion 11 will enter, thereby facilitating the adjustment of the position of the reflux channel in the sheath tube 20 and improving the accuracy and reliability of the operation.

[0090] According to an alternative embodiment, referring to Figure 7 , Figure 8The surface of the insertion part 11 is provided with marking lines 14, which are distributed along the length direction of the insertion part 11. Through the marking lines 14, the operator can intuitively judge the orientation of the insertion part 11, so as to more conveniently fix the elastic member 100 to a specific position. In this way, the result of the insertion part 11 entering the first annular cavity 110 or the second annular cavity 120 can be controlled, making the layout of the reflux channel more controllable and convenient for adjustment and optimization in actual operation.

[0091] According to an optional embodiment, the insertion portion 11 is provided with an abutment 15, and the abutment 15 at least partially protrudes from the surface of the insertion portion 11. When the insertion portion 11 is located in the sheath tube 20, the abutment 15 causes the insertion portion 11 to deviate from the central axis of the sheath tube 20. Exemplarily, the abutment 15 is detachably connected to the insertion portion 11 and is arranged at intervals along the length direction of the insertion portion 11. Through such a design, the abutment 15 can achieve a guiding effect on the insertion portion 11 as a whole deviating from the central axis of the sheath tube 20.

[0092] In addition, the setting direction of the abutment member 15 can be combined with the fixed orientation of the elastic member 100, so that the entire portion from the front end portion 12 to the insertion portion 11 is offset to the same side of the sheath tube 20. This design can provide a more controllable offset effect, and provides flexibility for optimizing the layout of the reflux channel and adjusting during use.

[0093] The third aspect of this embodiment provides a detailed description of an implantation system.

[0094] Reference Fig.10 , Fig.11 , an insertion system comprises a sheath tube 20 and the endoscope 10 in the above embodiment, wherein the insertion portion 11 is located in the sheath tube 20. In this way, the insertion system has the beneficial effects of the above endoscope 10, which will not be described in detail here.

[0095] In some embodiments, the sheath 20 includes an entry port 22 disposed at the proximal end, and the entry port 22 is flared so that the front end 12, the insertion portion 11, and the abutment member 15 can more easily enter the sheath 20. The flared entry port 22 can effectively guide the insertion portion 11, reduce the difficulty of insertion, and improve the smoothness and accuracy of the operation.

[0096] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A resilient structure, applied to an endoscope (10) and / or a sheath (20), wherein the endoscope (10) comprises an insertion portion (11), characterized in that: The resilient structure comprises an elastic member (100), the elastic member (100) being used to be arranged on the sheath tube (20) and / or the insertion portion (11), the elastic member (100) having a first state and a second state, the elastic member (100) being elastically deformable from the first state to the second state when subjected to an external force, and the elastic member (100) being arranged in a ring shape; Wherein, when the insertion portion (11) is located inside the sheath tube (20): When the elastic member (100) is in a first state, the elastic member (100) can cause the insertion portion (11) to at least partially deviate from the central axis of the sheath tube (20), and the elastic member (100) is located at the distal end side of the sheath tube (20), so that the reflux channel between the endoscope (10) and the sheath tube (20) is divided into a plurality of small openings; When the elastic member (100) is in the second state, the insertion portion (11) may be located at the central axis of the sheath tube (20).

2. A rebound structure according to claim 1, characterized in that: A front end portion (12) is provided at the distal end of the insertion portion (11), and the outer diameter of the front end portion (12) is larger than the outer diameter of the insertion portion (11); When the elastic member (100) is in the second state, it can be sleeved on the front end portion (12); When the elastic member (100) is in a first state, the elastic member (100) has a first annular cavity (110), a second annular cavity (120) and a narrow neck (150); the first annular cavity (110) and the second annular cavity (120) are connected via the narrow neck (150); and the width of the narrow neck (150) is smaller than the minimum projection width of the insertion portion (11).

3. A rebound structure according to claim 2, characterized in that: The sheath tube (20) is provided with a blocking portion (21), and the elastic member (100) is provided with a protruding portion (160); when the elastic member (100) moves axially along the sheath tube (20), the blocking portion (21) can abut against the protruding portion (160) to prevent the elastic member (100) from further moving; Alternatively, the elastic member (100) is connected to a driving member, and the driving member is used to drive the elastic member (100) to move along the axial direction of the endoscope (10), so that the elastic member (100) moves from the front end portion (12) to the insertion portion (11).

4. A rebound structure according to claim 2, characterized in that: The front end portion (12) is provided with a limiting portion (12a) protruding radially along the front end portion (12), and at least a portion of the elastic member (100) protrudes from the limiting portion (12a) in the radial direction of the front end portion (12); And / or, when the elastic member (100) is sleeved on the front end portion (12), in the radial direction of the front end portion (12), at least a portion of the elastic member (100) protrudes from the surface of the front end portion (12); And / or, the inner wall of the elastic member (100) is smoothly arranged.

5. A rebound structure according to claim 2, characterized in that: When the elastic member (100) is in the first state, the elastic member (100) forms a first recessed portion (130) and a second recessed portion (140), the narrow neck (150) is formed between the first recessed portion (130) and the second recessed portion (140), and the first recessed portion (130) and the second recessed portion (140) are staggered and arranged on both sides of the narrow neck (150).

6. A rebound structure according to claim 2, characterized in that: The first annular cavity (110) and the second annular cavity (120) have the same shape; And / or, the first annular cavity (110) and the second annular cavity (120) are of the same size.

7. An endoscope, characterized in that: The invention comprises an insertion portion (11) and a front end portion (12), wherein the outer diameter of the front end portion (12) is larger than the outer diameter of the insertion portion (11), and the front end portion (12) is provided with a rebound structure according to any one of claims 1 to 6.

8. An endoscope according to claim 7, characterized in that: The surface of the insertion portion (11) is provided with marking lines (14), and the marking lines (14) are distributed along the length direction of the insertion portion (11).

9. An endoscope according to claim 7, characterized in that: The insertion portion (11) is provided with an abutment member (15), wherein the abutment member (15) at least partially protrudes from the surface of the insertion portion (11); when the insertion portion (11) is located in the sheath tube (20), the abutment member (15) causes the insertion portion (11) to deviate from the central axis of the sheath tube (20).

10. An implantation system, characterized in that: It comprises a sheath tube (20) and an endoscope (10) according to any one of claims 7 to 9, wherein the insertion portion (11) is located inside the sheath tube (20).

Images