Suction assembly, operating portion, and endoscope

Abstract

The application provides a suction assembly, an operating part and an endoscope, relates to the technical field of endoscopes, and solves the low assembly efficiency of the existing suction assembly. The suction assembly is applied to the operating part of the endoscope and comprises a suction tube and a connecting piece. The proximal end of the suction tube is inserted into the cavity of the connecting piece in the axial direction, and the suction tube can be adjusted relative to the cavity between a first insertion depth and a second insertion depth. At the first insertion depth, the negative pressure suction hole provided in the connecting piece is in communication with the atmosphere hole through the cavity, the proximal end port of the suction tube is in the cavity, and the suction assembly is in a non-suction working state. At the second insertion depth, the proximal end port of the suction tube is in communication with the negative pressure suction hole through the cavity, the proximal end of the suction tube is in sealing fit with the cavity on the communication path between the negative pressure suction hole and the atmosphere hole to make the negative pressure suction hole and the atmosphere hole fluidly disconnected, and the suction assembly is in a suction working state. The suction tube serves as the switching function of the existing valve rod, the suction valve or the valve rod can be omitted, and the structure and assembly process of the suction assembly are simplified.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, specifically to a suction assembly, an operating part, and an endoscope. Background Technology

[0002] Some types of medical endoscopes are equipped with a suction assembly, which can be used to aspirate substances such as sputum, thrombi, and free tissue. The suction assembly typically includes a suction valve, a suction tube connected to the suction port of the suction valve, and a negative pressure suction nozzle connected to the discharge port of the suction valve. The suction assembly connects to the instrument tubing via the distal end of the suction tube to the proximal port of a Y-connector, establishing a suction channel from the instrument tubing to the Y-connector, the suction tube, and the negative pressure suction nozzle. When the negative pressure suction nozzle is connected to a negative pressure source, the appropriate suction timing can be selected by controlling the suction valve to aspirate sputum, thrombi, free tissue, etc., from the distal end of the instrument tubing into the suction tube and finally to the negative pressure suction nozzle for removal.

[0003] The process of assembling the suction assembly onto the endoscope's handle housing requires first assembling the suction valve, then connecting the suction valve to the negative pressure suction nozzle and suction tube to form the suction assembly, and finally installing the suction assembly onto the endoscope's handle housing. The suction valve, the core component for controllable suction, has many parts, typically including a valve body, valve stem, valve cap, blind end plug, return spring, and sealing ring, making assembly relatively complicated. Installing the suction assembly onto the handle housing requires aligning the proximal end of the suction tube with the proximal end of the Y-connector (whether installed or not on the handle housing). After alignment, the suction valve and negative pressure suction nozzle, or the Y-connector, are simultaneously installed onto the handle housing. This installation process requires adjusting the posture of the suction valve, negative pressure suction nozzle, or Y-connector, which can easily cause the suction valve and suction tube to detach. All of these factors contribute to the low efficiency of suction assembly. Summary of the Invention

[0004] The purpose of this invention is to design a suction assembly, an operating part, and an endoscope to solve the problem of low assembly efficiency of the suction assembly.

[0005] This invention is achieved through the following technical solution:

[0006] On one hand, this application provides a suction assembly for use in an endoscope, comprising a suction tube and a docking member; the suction tube extends axially from a proximal end to a distal end and is provided with a proximal port and a distal port; the docking member is provided with a cavity axially recessed from the distal end to the proximal end, and a negative pressure suction port and a large air port respectively communicating the cavity with the outside; wherein, the proximal end of the suction tube is axially movable and inserted into the cavity, so as to be adjustable relative to the cavity between a first insertion depth and a second insertion depth; at the first insertion depth, the negative pressure suction port and the large air port are in fluid communication through the cavity, the proximal port of the suction tube is in the cavity, and the suction assembly is in a non-suction working state; at the second insertion depth, the proximal port of the suction tube is in fluid communication with the negative pressure suction port through the cavity, the proximal end of the suction tube is sealed with the cavity on the fluid communication path between the negative pressure suction port and the large air port so that the negative pressure suction port is fluidly disconnected from the large air port, and the suction assembly is in a suction working state.

[0007] When the above-described structure is adopted, the suction tube used in the suction assembly not only serves as a conduit for conveying the suction material, but also acts as a switching mechanism similar to a valve stem in the prior art. By simply inserting the proximal end of the suction tube of the suction assembly axially into the cavity of the docking member, the suction assembly can be switched between a non-suction working state and a suction working state by adjusting the insertion depth of the suction tube into the cavity. It is evident that switching the working state of the suction assembly only requires mutually inserted suction tubes and docking members. The docking member only needs to be a tube with a cavity for inserting the suction tube and a negative pressure suction port and a large air port communicating with the cavity. Compared to existing suction assemblies that require a suction valve to switch working states, the suction assembly of the present invention can eliminate the suction valve or at least the valve stem, simplifying the structure. Furthermore, the assembly process of the suction assembly is simplified compared to suction assemblies with a suction valve. Therefore, the suction assembly of the present invention has certain advantages in terms of cost and assembly process.

[0008] On the other hand, this application provides an operating part, which includes a handle housing, a Y-type connector and the above-mentioned suction assembly, wherein the mating part of the suction assembly is fixedly installed on the handle housing, and the distal end of the suction tube is mated to the proximal end of the Y-type connector.

[0009] On the other hand, this application provides an endoscope including an insertion part and the aforementioned operating part, wherein the insertion part is mounted on the handle housing and connected to the distal end of the Y-type connector.

[0010] The present invention has the following advantages and beneficial effects:

[0011] In this invention, the suction tube used in the suction assembly not only serves as a conduit for conveying the suction material but also functions as a switching mechanism, similar to a valve stem in existing technologies. By simply inserting the proximal end of the suction tube axially into the cavity of the docking member, the suction assembly can be switched between a non-suction and suction operating state by adjusting the insertion depth of the suction tube. Therefore, switching the operating state of the suction assembly only requires the interlocking suction tube and docking member. The docking member simply needs a cavity for inserting the suction tube, along with a negative pressure suction port and a large air port communicating with the cavity. Compared to existing suction assemblies that require a suction valve to switch operating states, the suction assembly of this invention eliminates the need for a suction valve or at least a valve stem, simplifying the structure. Furthermore, the assembly process is simplified compared to suction assemblies with suction valves. Thus, the suction assembly of this invention offers advantages in both cost and assembly process. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the external structure of an endoscope equipped with a suction component;

[0014] Figure 2 This is a schematic diagram of the external structure of a suction assembly without control components.

[0015] Figure 3 The diagram shows a cross-sectional view of the suction assembly in a non-suction operating state in some embodiments (the dashed path in the figure represents the atmospheric flow path).

[0016] Figure 4 The diagram shows a cross-sectional view of the suction assembly in the suction working state of some embodiments (double-dotted lines in the figure indicate the material flow path).

[0017] Figure 5 The diagram shows a cross-sectional view of the suction assembly in a non-suction operating state, with the atmospheric vent located at the distal opening of cavity 21 (the dashed path in the diagram represents the atmospheric flow path).

[0018] Figure 6 The diagram shows a cross-sectional view of the suction assembly, which is closed at the proximal end of the cavity by the docking member itself, in a working state between a non-suction working state and a suction working state (the dashed path in the diagram represents the atmospheric flow path; the double-dotted line in the diagram represents the material flow path).

[0019] Figure 7 The diagram shows a cross-sectional view of the suction assembly in suction operation according to other embodiments (the dashed circle in the figure represents an atmospheric pore blocked by an annular protrusion on the suction tube).

[0020] Figure 8 Cross-sectional views of the suction assembly in a non-suction operating state are shown in some other embodiments;

[0021] Figure 9 The diagram shows a cross-sectional view of the suction assembly in a non-suction operating state, with the atmospheric vent sealed by the proximal end face of the suction tube.

[0022] Figure 10 The diagram shows a cross-sectional view of the suction assembly in suction operation, with the atmospheric vent sealed by the proximal end face of the suction tube.

[0023] Figure 11 This is a schematic diagram of the external structure of the suction assembly with control components;

[0024] Figure 12 It shows in Figure 11 The appearance structure of the suction assembly, which incorporates a guide structure, has been added to the basic design.

[0025] Figure 13 The internal layout structure of the operating part of some embodiments is shown, and the controllable section of the suction component in the figure is in a straight shape;

[0026] Figure 14 It shows Figure 13 Partial cross-sectional view of the suction assembly (the larger dashed circle in the figure represents the negative pressure suction hole blocked by the proximal end of the suction tube, and the smaller dashed circle represents the atmospheric pore blocked by the proximal end of the suction tube).

[0027] Figure 15 The internal layout structure of the operating part of some embodiments is shown, and the controllable section of the suction component in the figure is in a bent shape;

[0028] Figure 16 It shows Figure 15 Partial cross-sectional view of the suction component (the dashed circle in the figure represents the atmospheric pore blocked by the proximal end of the suction tube).

[0029] Figure 17 The diagram illustrates the structure of the suction assembly and the perforated post of the handle housing in some embodiments for anti-rotation connection.

[0030] The diagram is marked as follows:

[0031] 100. Suction assembly;

[0032] 10. Suction tube; 10a. Controllable section; 11. Annular protrusion; 111. Slope; 101. Proximal end of tube; 102. Distal end of tube; 103. Closed end; 104. Limiting protrusion; 105. Tube sleeve; 106. Fixing ring; 107. Slide groove;

[0033] 20. Connecting part; 21. Cavity; 211. Stop protrusion; 212. Closed end face; 213. Annular step; 22. Negative pressure suction hole; 23. Negative pressure pipe joint; 24. Large air hole; 25. Large air tube; 26. Plug; 27. Guide block;

[0034] 30. Control component; 31. Push rod; 32. Mounting box; 33. Return spring;

[0035] 40. Connecting parts;

[0036] 200. Handle housing; 201. Bracket; 202. Hole post;

[0037] 300, Y-type connector;

[0038] 400. Insertion section;

[0039] 500. Traction components;

[0040] 900. Stones or blood clots. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0043] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0044] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0046] This invention discloses specific embodiments of a suction component, an operating part, and an endoscope, which simplify the structure of the suction component equipped in the operating part of the endoscope, thereby reducing the production cost and assembly difficulty of the suction component and the entire endoscope, and at the same time solving the problems of suction material blockage and suction component control jamming to a certain extent.

[0047] The following is in conjunction with the appendix Figures 1 to 15 The aspiration assembly, operating part, and endoscope provided in this application will be described in detail through specific embodiments and application scenarios.

[0048] On the one hand, the present invention discloses a suction assembly 100, which, as... Figure 17 As shown, when applied in an endoscope, it can be fixedly mounted on the handle housing 200 of the endoscope. The suction assembly 100 can be connected to an external negative pressure source and, when the time is right, can controllably generate negative pressure suction force in the suction assembly 100 to draw material located at the distal end of the insertion part 400 of the endoscope into the channel of the suction assembly 100 and finally discharge it.

[0049] like Figure 2As shown, the suction assembly 100 includes a suction tube 10 and a docking member 20 that are axially joined together. (Reference) Figure 3 - Figure 5 The suction tube 10, as a switch control component, functions to controllably aspirate the substance to be aspirated from the human body at the appropriate time by engaging with the docking part 20.

[0050] like Figure 2 and Figure 4 As shown, the suction tube 10 extends axially from its proximal end to its distal end along its axis. The suction tube 10 has a proximal port 101 at its proximal end and a distal port 102 at its distal end, and has an internal conduit that provides fluid communication between the proximal port 101 and the distal port 102. In some endoscopes, the suction tube 10 of the suction assembly 100 is arranged in a straight line, but in other endoscopes, the reference... Figure 13 Due to the layout within the handle housing 200, the suction tube 10 of the suction assembly 100 is not arranged in a straight line, but has at least one bend in its extension path. As for the suction assembly 100, the suction tube 10 can be prefabricated to conform to the layout of the handle housing 200, or it can be bent into a shape conforming to the layout of the handle housing 200 after being assembled into the handle housing 200.

[0051] like Figure 2 and Figure 4 As shown, the docking member 20 has a cavity 21 enclosed by its outer shell wall. The cavity 21 is an inwardly recessed space extending axially from the distal end face of the docking member 20 towards its proximal end. The shell wall of the docking member 20 has independent negative pressure suction holes 22 and atmospheric holes 24. One end of the negative pressure suction hole 22 connects to the cavity 21 at one location and the other end connects to the outside. One end of the atmospheric hole 24 connects to the cavity 21 at another location and the other end connects to the outside, allowing the negative pressure suction hole 22 and the atmospheric hole 24 to independently connect the cavity 21 to the outside. The other end of the negative pressure suction hole 22 is used to connect to an external negative pressure source to introduce negative pressure into the suction assembly 100. The other end of the atmospheric hole 24 is always exposed to the environment, specifically either located inside the handle housing 200 or exposed on the outside of the handle housing 200.

[0052] For example, cavity 21 extends from the distal end of docking member 20 toward the proximal end of docking member 20 but does not penetrate the blind hole of docking member 20.

[0053] For example, cavity 21 extends from the distal end of docking member 20 toward the proximal end of docking member 20 and passes through a through hole in docking member 20. If necessary, a plug can be placed at the proximal end of cavity 21 to seal it.

[0054] like Figure 2 and Figure 3 As shown, the proximal end of the suction tube 10 extends axially into the cavity 21 from the opening on the distal face and is ultimately inserted into the cavity 21. Figure 3 - Figure 5 As shown, the proximal end of the suction tube 10 inserted into the cavity 21 can move axially relative to the cavity 21 to adjust the insertion depth, thereby switching the working state of the suction assembly 100.

[0055] The proximal end of the suction tube 10 has a first insertion depth and a second insertion depth relative to the cavity 21 within the cavity 21.

[0056] When the proximal end of the suction tube 10 is at the first insertion depth relative to the cavity 21, the negative pressure suction hole 22 and the atmospheric hole 24 on the docking member 20 establish a fluid communication relationship through the cavity 21, and the proximal end of the suction tube 10 is inside the cavity 21. At this time, the suction assembly 100 is in a non-suction working state. At this time, the proximal end 101 of the suction tube 10 can be fluidly connected to the negative pressure suction hole 22 through the cavity 21, or it can be sealed with certain parts inside the cavity 21 to disconnect the fluid. When the proximal end 101 of the suction tube 10 is fluidly connected to the negative pressure suction hole 22 through the cavity 21, the fluid passage between the negative pressure suction hole 22 and the atmospheric hole 24 is unobstructed. For example, the flow cross-section at various points of the fluid passage is large, making it difficult to generate negative pressure suction force or sufficient negative pressure suction force in the middle or distal part of the suction tube 10 under the action of conventional suction force, so as not to extract the material to be suctioned from the human body. The conventional suction force refers to the suction force of the negative pressure source set up under normal circumstances to safely remove substances (stones, loose tissue, blood clots, etc.) from the human body. This suction force is usually a selectable value within a safe suction force range or a value range that can be adjusted during surgery.

[0057] When the proximal end of the suction tube 10 is at the second insertion depth relative to the cavity 21, the proximal end of the suction tube 10 is in fluid communication with the negative pressure suction hole 22 on the docking member 20 through the cavity 21. At the same time, the proximal end of the suction tube 10 is sealed to the inner wall of the cavity 21 to form a sealing part. This sealing part is located on the fluid communication path between the negative pressure suction hole 22 and the atmospheric hole 24, thereby blocking the fluid communication relationship between the negative pressure suction hole 22 and the atmospheric hole 24. At this time, the fluid between the negative pressure suction hole 22 and the atmospheric hole 24 is disconnected, and the suction force provided by the negative pressure source can be fully applied to the suction tube 10, and the suction assembly 100 is in the suction working state.

[0058] In order to allow the proximal end of the suction tube 10 to move axially relative to the cavity 21 of the docking member 20.

[0059] For example, the proximal end of the suction tube 10 is configured as an axially extendable telescopic section, which is connected to the proximal end of the middle section of the suction tube 10. The inner wall of the axially extendable section is configured as an inflatable hollow structure. The proximal end of the suction tube 10 is connected to an air source through an air tube. The axial length of the proximal end of the suction tube 10 can be adjusted by controlling the amount of air, thereby achieving the purpose of axially moving the proximal end of the suction tube 10 relative to the cavity 21.

[0060] For example, since the proximal end of the suction tube 10 is not or almost impossible to extend or retract axially, the axial movement of the proximal end of the suction tube 10 relative to the cavity 21 can be achieved by controlling the overall or partial axial movement or radial bending of the middle section of the suction tube 10 to one side, thereby causing the entire proximal end to be constrained by the cavity 21 and move axially. For example, the portion of the suction tube 10 located outside the cavity 21 can be pulled axially to move the proximal end of the suction tube 10 axially towards the distal end of the docking member 20 relative to the cavity 21; or, for example, a lateral force, such as a radial thrust, can be applied to the middle section of the suction tube 10 located between the proximal and distal ends and outside the cavity 21, causing the middle section of the suction tube 10 to bend laterally at the force-bearing location, thereby allowing the distal end of the suction tube 10 to be fixed (after the suction tube 10 is installed into the handle housing 200 of the endoscope, its distal end will be fixed to the end). The Y-connector 300 on the handle housing 200 engages to fix the distal end of the suction tube 10, which pulls the proximal end of the suction tube 10 axially toward the distal end of the cavity 21 relative to the cavity 21. If the suction tube 10 has good elasticity, it can straighten itself after losing radial thrust, pushing the distal end axially back toward the proximal end of the cavity 21. If the suction tube 10 has poor elasticity, it can straighten itself by applying the opposite radial thrust, thus pushing the distal end axially back toward the proximal end of the cavity 21. The proximal end of the suction tube 10 has a certain axial length. Depending on the axial depth of the cavity 21, the proximal end of the suction tube 10 can remain within the cavity 21 throughout its axial movement between the first and second insertion depths, or it can have a length extending out of the cavity 21 that changes synchronously with the axial movement in all or part of the axial path.

[0061] In this embodiment, the suction tube 10 of the suction assembly 100 not only serves as a conduit for conveying the suction material, but also functions as a switching mechanism similar to a valve stem in the prior art. By simply inserting the proximal end of the suction tube 10 of the suction assembly 100 axially into the cavity 21 of the docking member 20, the suction assembly 100 can be switched between a non-suction working state and a suction working state by adjusting the insertion depth of the suction tube 10 into the cavity 21. As can be seen, to achieve the switching of the working state of the suction assembly 100, only the suction tube 10 and the docking part 20 that are inserted into each other are needed. The docking part 20 only needs to be a tube with a cavity 21 for the suction tube 10 to be inserted into, and a negative pressure suction hole 22 and a large air hole 24 communicating with the cavity 21. Compared with the existing suction assemblies that need to switch the working state through a suction valve, the suction assembly 100 of the present invention can eliminate the suction valve or at least the valve stem, which can simplify the structure. Furthermore, the suction assembly 100 can simplify the assembly process compared with the suction assembly with a suction valve. It can be seen that the suction assembly 100 of the present invention has certain advantages in terms of cost and assembly process.

[0062] For example, in some embodiments, a cavity 21 is directly provided on the negative pressure suction nozzle, and a negative pressure suction hole 22 and a large air hole 24 communicating with the cavity 21 are also provided on the negative pressure suction nozzle. By directly inserting the proximal end of the suction tube 10 into the cavity 21, it forms a suction assembly 100 with the negative pressure suction nozzle. This eliminates the need for a suction valve, which has certain advantages in terms of cost and assembly process. Furthermore, it is easy to see that when the suction assembly 100 is installed on the handle housing 200, it is no longer necessary to adjust the posture of the suction valve, which will make it less likely for the suction tube 10 to fall off, thus improving the assembly efficiency of the suction assembly 100.

[0063] Existing suction valves typically use a valve stem to laterally cut off the suction channel, isolating the suction tube from the negative pressure suction nozzle to prevent material from entering the nozzle when suction is not needed. Therefore, during the switching of operating states, the valve stem gradually reduces the size of the suction tube opening, blocking material passage. The valve stem end may also push material towards the blind end of the spring-loaded cavity wall, affecting the normal operation of the valve stem and causing valve jamming. This can affect material flow and lead to suction channel blockage. In the suction assembly 100 of this embodiment, during the axial movement of the suction tube 10 relative to the cavity 21, the operating state is switched by establishing a sealing relationship with the inner wall of the cavity 21 to block or open the fluid communication path between the negative pressure suction hole 22 and the atmospheric hole 24. Instead of directly switching operating states using the valve stem, this prevents the valve stem from pushing the suctioned material towards the blind end of the spring-loaded cavity, reducing the likelihood of suction channel blockage and effectively preventing control jamming. This ensures, to a certain extent, the smooth flow of suctioned material.

[0064] According to some optional embodiments, during the reciprocating movement of the proximal end of the suction tube 10 relative to the cavity 21 between a first insertion depth and a second insertion depth, the proximal port 101 and the distal port 102 of the suction tube 10 are always in fluid communication through the conduit of the suction tube 10 and will not be blocked due to bending or collapse. That is, at the first insertion depth, the distal port 102 and the proximal port 101 of the suction tube 10 are in fluid communication through the conduit provided inside the suction tube 10; at the second insertion depth, the distal port 102 and the proximal port 101 of the suction tube 10 are in fluid communication through the conduit provided inside the suction tube 10; and at any time between the first and second insertion depths, the distal port 102 and the proximal port 101 of the suction tube 10 are in fluid communication through their internal conduit.

[0065] According to some optional embodiments, the proximal end of the suction tube 10 is configured as an elastic tube body, so that the proximal end of the suction tube 10 can have good shape retention ability during axial movement relative to the cavity 21, and can also maintain a good sealing fit with the cavity 21 when the suction tube 10 is at the second insertion depth relative to the cavity 21.

[0066] According to some optional embodiments, such as Figure 3 As shown, the mating part 20 is provided with an insertion hole that extends axially from the proximal end to the distal end. A plug 26 is installed at the proximal opening of the insertion hole. The plug 26 seals the proximal end of the insertion hole to form a cavity 21 with a proximal end sealed and a distal end opening.

[0067] According to some optional embodiments, the suction tube 10 is sealed to the cavity 21 through its outer peripheral wall. When the proximal end of the suction tube 10 is at a second insertion depth relative to the cavity 21, the outer peripheral wall of the proximal end of the suction tube 10 is sealed to the cavity 21, blocking the fluid passage between the negative pressure suction port 22 and the atmospheric port 24. When the proximal end of the suction tube 10 is at a first insertion depth relative to the cavity 21, the outer peripheral wall of the suction tube 10 will at least partially disengage from the cavity 21, so that the fluid passage between the negative pressure suction port 22 and the atmospheric port 24 is unobstructed.

[0068] In some embodiments, such as Figure 3 - Figure 5As shown, the proximal end of the suction tube 10 is a section with approximately uniform wall thickness. A circumferentially extending annular protrusion 11 is provided on the outer peripheral wall of the proximal end of the suction tube 10, forming a radially protruding ring at the proximal end of the suction tube 10. The annular protrusion 11 can be a separate part, fixed to the proximal end of the suction tube 10 by adhesive bonding, or it can be an annular structure formed by extrusion molding integrally with the suction tube 10. The connecting member 20 has a circumferentially extending annular step 213 on the inner peripheral wall of the cavity 21. The annular step 213 is coaxially arranged with the annular protrusion 11, and the inner diameter of the annular step 213 is larger than the outer diameter of the suction tube 10, allowing the suction tube 10 to move smoothly inside the annular step 213.

[0069] The negative pressure suction hole 22 and the large air hole 24 provided on the docking member 20 are arranged sequentially from the proximal end to the distal end along the axial direction of the cavity 21, and the large air hole 24 is closer to the proximal end of the docking member 20 than the annular step 213. When the negative pressure suction hole 22 is arranged closer to the proximal end than the large air hole 24, the first insertion depth of the proximal end of the suction tube 10 into the cavity 21 is greater than the second insertion depth.

[0070] When the proximal end of the suction tube 10 is at the first insertion depth relative to the cavity 21, such as Figure 3 As shown, the annular protrusion 11 is axially separated from the annular step 213, so that the negative pressure suction hole 22 and the atmospheric hole 24 are in fluid communication through the cavity 21. Figure 3 The image shows a suction assembly 100 in a non-suction operating state, where the dashed path represents the atmospheric flow path in this case.

[0071] At the second insertion depth, the proximal end of the suction tube 10 relative to the cavity 21 is as follows: Figure 4 As shown, the annular protrusion 11 axially abuts against the annular step 213 and forms an axial seal at the contact surface, blocking the fluid passage between the negative pressure suction hole 22 and the atmospheric hole 24, so as to disconnect the fluid between the negative pressure suction hole 22 and the atmospheric hole 24. Figure 4 The image shows a suction assembly 100 in suction operation, wherein the double-dotted line path shown indicates the flow path of the material being suctioned, including stones or thrombi 900.

[0072] The atmospheric pore 24 provided on the mating part 20 can be located as follows: Figure 3 The mating member 20 shown extends radially on its peripheral wall, and can also be located as follows: Figure 5 The distal end face of the docking member 20 shown. Figure 5 In the cavity 21, the atmospheric vent 24 of the docking member 20 is specifically located at the distal opening. When the proximal end of the suction tube 10 is inserted into the cavity 21, a gap is formed between the atmospheric vent 24 and the outer peripheral wall of the suction tube 10 to allow airflow. Figure 5 The dashed path shown represents the atmospheric flow path under this configuration.

[0073] Of course, in other embodiments, the negative pressure suction hole 22 and the atmospheric pressure hole 24 provided on the docking member 20 are arranged sequentially from the distal end to the proximal end along the axial direction of the cavity 21, and the negative pressure suction hole 22 is closer to the proximal end of the docking member 20 than the annular step 213. When the atmospheric pressure hole 24 is located closer to the proximal end than the negative pressure suction hole 22, the first insertion depth of the proximal end of the suction tube 10 into the cavity 21 is greater than the second insertion depth. Furthermore, the proximal end port 101 of the suction tube 10 should be opened in a similar manner. Figure 7 or Figure 9 The perimeter shown.

[0074] In this way, when the proximal end of the suction tube 10 is at the first insertion depth relative to the cavity 21, the annular protrusion 11 and the annular step 213 are axially separated, so that the negative pressure suction hole 22 and the atmospheric hole 24 are in fluid communication through the cavity 21. At the same time, the proximal end of the tube is also in fluid communication with the negative pressure suction hole 22. However, since the negative pressure suction hole 22 and the atmospheric hole 24 are in a fully connected state, the conventional suction force cannot form a sufficient negative pressure in the suction tube 10.

[0075] When the proximal end of the suction tube 10 is at the second insertion depth relative to the cavity 21, the annular protrusion 11 will axially abut against the annular step 213 and form an axial seal at the contact surface, blocking the fluid passage between the negative pressure suction hole 22 and the atmospheric hole 24, so that the fluid between the negative pressure suction hole 22 and the atmospheric hole 24 is disconnected, while the proximal end of the tube is in fluid communication with the negative pressure suction hole 22.

[0076] During the process of switching between a first insertion depth and a second insertion depth along the axial direction relative to the cavity 21 at the proximal end of the suction tube 10, such as Figure 6 As shown, when the insertion depth is within a certain range, the proximal end port 101 of the suction tube 10 is simultaneously fluidly connected to the negative pressure suction hole 22 and the atmospheric hole 24 of the docking member 20 through the cavity 21. At the same time, the negative pressure suction hole 22 and the atmospheric hole 24 are not completely connected. The suction tube 10 and the cavity 21 cooperate to form a small flow gap, which allows the suction tube 10 to be distributed with a certain suction force, resulting in a certain negative pressure sufficient to suction substances from the human body within the suction tube 10. Figure 6 The dashed and double-dotted paths represent the atmospheric flow path and the flow path of the suctioned substance, respectively. This situation means that the suction assembly 100 has an intermediate working state where the suction force of the suction tube 10 is between the suction working state and the non-suction working state.

[0077] To better utilize this intermediate working state and broaden the adjustable range of suction force of the suction tube 10 to adapt to different suction situations, such as suction situations where excessive suction could damage the mucous membrane of human cavities, in some embodiments, the annular protrusion 11 provided at the proximal end of the suction tube 10 can be as follows: Figure 6 As shown, the surface used to engage with the annular step 213 is configured as a slope 111 whose radial dimension gradually decreases from the proximal end to the distal end. The slope of the slope 111 can be set according to actual needs. For example, when a slow adjustment is required to avoid unexpected high or low pressure due to excessive adjustment speed, the slope of the slope 111 can be set to be smaller. In this way, during the movement of the proximal end of the suction tube 10 relative to the cavity 21 from the first insertion depth to the second insertion depth, the engagement of the slope 111 with the annular step 213 will result in a better suction force adjustment effect of the suction tube 10.

[0078] In this embodiment, the outer peripheral wall of the suction tube 10 is provided with an annular protrusion 11. The suction tube 10 can obtain an axial limiting effect by using the annular protrusion 11 to cooperate with the inner peripheral wall of the cavity 21 or the proximal end face of the annular step 213 provided in the cavity 21.

[0079] According to some optional embodiments, such as Figure 7 and Figure 8 As shown, the suction tube 10 is sealed to the inner wall of the cavity 21 through its outer peripheral wall. The proximal end of the suction tube 10 is set as an elastic tube section, which is sealed by cooperating with the shaft hole of the cavity 21 of the docking piece 20.

[0080] Specifically, the suction tube 10 has an annular protrusion 11 extending circumferentially around its proximal end. The outer peripheral wall of the annular protrusion 11 contacts the inner peripheral wall of the cavity 21 to form a seal. The proximal end port 101 of the suction tube 10 is located on the periphery of the suction tube 10, specifically at the annular protrusion 11. In the docking member 20, the negative pressure suction hole 22 and the atmospheric hole 24 are approximately distributed at the same axial position and arranged sequentially along the circumference. The annular protrusion 11 on the suction tube 10 has a certain axial width. When the annular protrusion 11 moves axially to the negative pressure suction hole 22, the outer peripheral wall of the annular protrusion 11 can simultaneously block the negative pressure suction hole 22 and the atmospheric hole 24 to disconnect the fluid flow between the negative pressure suction hole 22 and the atmospheric hole 24.

[0081] In this embodiment, the first insertion depth of the proximal end of the suction tube 10 into the cavity 21 is less than the second insertion depth. When the proximal end of the suction tube 10 is at the second insertion depth relative to the cavity 21, the outer peripheral wall of the annular protrusion 11 at the proximal end of the suction tube 10 contacts and seals with the inner peripheral wall of the cavity 21, and closes the large air hole 24 ( Figure 7The dotted circle in the middle is completely blocked. At this time, the outer peripheral wall of the annular protrusion 11 also blocks the negative pressure suction hole 22. However, since the proximal end port 101 of the suction tube 10 is located at the annular protrusion 11, it is in radial fluid communication with the negative pressure suction hole 22.

[0082] When the proximal end of the suction tube 10 is at the first insertion depth relative to the cavity 21, the outer peripheral wall of the annular protrusion 11 at the proximal end of the suction tube 10 contacts and seals with the inner peripheral wall of the cavity 21, but avoids the large air hole 24. At this time, the annular protrusion 11 at least partially avoids the negative pressure suction hole 22, so that the large air hole 24 and the negative pressure suction hole 22 are in fluid communication through the cavity 21. At this time, the proximal end port 101 of the suction tube 10 can be completely blocked by the inner peripheral wall of the cavity 21 and can be closed or open.

[0083] In this embodiment, in order to better limit the position of the suction tube 10 at the first insertion depth and the second insertion depth, such as Figure 7 As shown, a radially inwardly extending stop protrusion 211 is provided at the distal opening of the docking member 20. Figure 8 In the middle, the suction tube 10 is at the first insertion depth relative to the cavity 21, and the suction tube 10 is axially limited by the axial abutment between the annular protrusion 11 and the stop protrusion 211.

[0084] The annular protrusion 11 in this embodiment can also be simplified. For example, the circumferential length of the annular protrusion 11 can be reduced, the central angle of the annular protrusion 11 can be slightly greater than 180°, and the annular protrusion 11 can only block the large air hole 24 when the proximal end of the suction tube 10 is at the second insertion depth.

[0085] According to some optional embodiments, such as Figure 9 and Figure 10 As shown, the suction tube 10 seals the atmospheric vent 24 through its proximal end or end face. The proximal end of the suction tube 10 is configured as a closed end 103, and the proximal end port 101 is located on the proximal periphery of the suction tube 10. The outer diameter of the proximal end of the suction tube 10 is smaller than the inner diameter of the cavity 21 of the docking member 20, so that an annular space is formed between the outer peripheral wall of the suction tube 10 and the inner peripheral wall of the cavity 21, which allows air to flow and substances to be sucked in.

[0086] The proximal end of the docking member 20 is provided with a plug 26 that seals the distal end of its internal insertion hole to form a cavity 21. A large air hole 24 of the docking member 20 is formed on the plug 26, for example, in the central region of the plug 26. The proximal end of the suction tube 10 can seal the large air hole 24 when it presses against the distal end face of the plug 26.

[0087] In this embodiment, the first insertion depth of the proximal insertion cavity 21 of the suction tube 10 is less than the second insertion depth.

[0088] In this embodiment, the negative pressure suction hole 22 can be located on the plug 26 at the outer side of the outer peripheral wall of the suction tube 10, or it can be located on the shell wall of the docking member 20.

[0089] like Figure 10 As shown, when the proximal end of the suction tube 10 is at the second insertion depth relative to the cavity 21, the closed end 103 of the proximal end of the suction tube 10 presses against the proximal end face of the plug 26 to form a sealing band around the atmospheric vent 24, thereby disconnecting the atmospheric vent 24 from the negative pressure suction port 22. The proximal end port 101 of the suction tube 10 is in fluid communication with the negative pressure suction port 22 through the annular space within the cavity 21. The negative pressure within the cavity 21 acts on the proximal end of the suction tube 10 to generate sufficient suction force, which can draw the material from the distal end of the suction tube 10 into the cavity 21.

[0090] like Figure 9 As shown, when the middle section of the suction tube 10 is subjected to axial or lateral force, its proximal end moves axially relative to the cavity 21 in the withdrawal direction to a first insertion depth relative to the cavity 21. The closed end 103 of the proximal end of the suction tube 10 disengages from the proximal end face of the plug 26, allowing the atmospheric vent 24 and the negative pressure suction vent 22 to communicate fluidly through the cavity 21. At this time, the communication surface between the atmospheric vent 24 and the negative pressure suction vent 22 is sufficient, and the negative pressure in the cavity 21 is difficult to generate sufficient negative pressure at the distal end of the suction tube 10.

[0091] In this embodiment, in order to better limit the position of the suction tube 10 at the first insertion depth and the second insertion depth, such as Figure 9 As shown, a limiting protrusion 104 is provided on the outer peripheral wall of the proximal end of the suction tube 10, and a stop protrusion 211 extending radially inward is provided at the distal opening of the docking member 20. Figure 9 In the middle, the suction tube 10 is at the first insertion depth relative to the cavity 21, and the suction tube 10 is axially limited by the limiting protrusion 104 and the stop protrusion 211 axially abutting.

[0092] In this embodiment, the closed end 103 of the suction tube 10 near its proximal end presses against the proximal end face of the plug 26 to form a sealing band around the large air hole 24, thereby blocking the proximal end opening 101 of the suction tube 10 from the negative pressure suction hole 22. This allows for better applicability of negative pressure levels. For example, when the negative pressure suction provided by the negative pressure source is large, a good suction effect can be achieved when the suction assembly 100 is in the suction working state. However, when the suction assembly 100 is not in the suction working state, even a large negative pressure suction will not form sufficient suction force at the distal end of the suction tube 10. This allows for adaptation to negative pressure sources that provide larger negative pressure by sealing the large air hole 24.

[0093] According to some alternative embodiments, the suction tube 10 is provided with an annular protrusion 11 or a limiting protrusion 104, and the proximal end of the suction tube 10 is axially inserted into the cavity 21 from the distal opening of the docking member 20. The suction tube 10 is configured at least as an elastic tube body so that the proximal end of the suction tube 10 can be flattened and smoothly inserted into the cavity 21 from the proximal end face opening of the docking member 20 and then restore its shape.

[0094] According to some alternative embodiments, the proximal port 101 is disposed at the proximal end of the suction tube 10, or the proximal port 101 is disposed on the proximal periphery of the suction tube 10 and there is a significant gap between the proximal port 101 and the inner peripheral wall of the cavity 21. Figure 2 - Figure 6 As shown, the proximal port 101 of the suction tube 10 in the suction assembly 100 is located at the proximal end face of the suction tube 10, and the distal port 102 of the suction tube 10 is located at the distal end face of the suction tube 10. The proximal end of the suction tube 10 is axially inserted into the cavity 21 of the docking member 20, with the proximal port 101 of the suction tube 10 pointing axially towards the proximal end of the docking member 20. Since the cavity 21 of the docking member 20 extends axially, during the process of the proximal end of the suction tube 10 moving axially relative to the cavity 21 to switch working states, there are no radially moving components blocking or cutting off the fluid passage between the proximal port 101 and the negative pressure suction hole 22 of the docking member 20. This, to a certain extent, ensures the integrity of the flow surface of the proximal port 101 of the suction tube 10, and to a certain extent, ensures the smooth flow of the suction material, making it less likely to cause suction channel blockage and effectively preventing control jamming problems. Figure 9 and Figure 10 As shown, the proximal end port 101 of the suction tube 10 in the suction assembly 100 is opened on the proximal periphery of the suction tube 10. There is a wide gap between the proximal end port 101 and the inner peripheral wall of the cavity 21. This also achieves the effect that the proximal end port 101 will not be transversely cut off during the process of the proximal end of the suction tube 10 moving axially relative to the cavity 21 to switch working states.

[0095] According to some optional embodiments, the suction tube 10 has a controllable section 10a in the middle section between the proximal and distal ends. The controllable section 10a is located outside the cavity 21 of the docking member 20. This section is flexible and easily bendable. Applying a lateral force to the controllable section 10a can cause it to bend laterally, thereby moving the proximal end of the suction tube 10 axially relative to the cavity 21. The entire or part of the middle section of the suction tube 10 is configured as the flexible controllable section 10a. After the suction tube 10 is installed on the endoscope handle housing 200, the distal end of the suction tube 10 is fixed to the Y-connector 300. When the controllable section 10a is subjected to a lateral force, it bends laterally, which can pull the proximal end of the suction tube 10 axially out relative to the cavity 21 to switch the working state. If the proximal end of the suction tube 10 is to be reset, an external force can be applied to the controllable section 10a in the opposite direction to restore its straight shape, thereby pushing the proximal end axially deeper relative to the cavity 21 to switch back to the previous working state.

[0096] In some embodiments, the controllable segment 10a is also an elastic tube that can bend laterally elastically when subjected to lateral force and automatically return to a straight state when the lateral force is lost.

[0097] In some embodiments, the entire middle section of the suction tube 10 is configured as a flexible controllable section 10a, and the tube segment connecting the suction tube 10 and the distal end of the controllable section 10a is the distal end of the suction tube 10. The distal end of the suction tube 10 is configured as a flexible and elastic tube to facilitate docking with the proximal end of the existing Y-type connector 300.

[0098] In other embodiments, a portion of the middle section of the suction tube 10 is configured as a flexible controllable section 10a. The proximal end of the controllable section 10a connects to the distal end of the proximal end of the suction tube 10. The section connected to the distal end of the controllable section 10a belongs to the middle section, which can be configured as a flexible tube with weaker bending ability than the controllable section 10a or a rigid tube. In this way, when a lateral force is applied to the controllable section 10a, the bending of the suction tube 10 will be more concentrated at the force-bearing part of the controllable section 10a, which can improve the response capability of the proximal end of the suction tube 10 and enable more rapid axial movement.

[0099] According to some optional embodiments, the distal end of the controllable segment 10a of the suction tube 10 is provided with a fixed point. After the suction tube 10 is installed on the endoscope handle housing 200, the controllable segment 10a is fixed relative to the handle housing 200 by the bracket 201 on the handle housing 200. The docking member 20 is also fixedly installed on the handle housing 200, so that the distal end of the controllable segment 10a is fixedly positioned relative to the docking member 20. When the controllable segment 10a of the suction tube 10 is subjected to a lateral force, the proximal end of the suction tube 10 can be smoothly moved axially relative to the cavity 21.

[0100] In some embodiments, the suction tube 10 is fitted with several sleeves 105 at fixed points on the controllable section 10a, for example... Figure 11 The two sections are shown in the diagram. The rigidity of the sleeve 105 is greater than that of the controllable section 10a and / or the section connected to the distal end of the controllable section 10a, in order to improve the rigidity of the distal end of the controllable section 10a and reduce or prevent bending or swaying under stress. This allows the distal end of the controllable section 10a to be more stably fixed to the sleeve 105, and also allows the distal end of the controllable section 10a to be more stably fixed to the bracket 201 through the sleeve 105. The sleeve 105 and the distal end of the controllable section 10a can be fixed by adhesive bonding or welding, and the sleeve 105 and the bracket 201 provided on the handle housing 200 can be fixed by adhesive bonding.

[0101] Of course, according to some alternative embodiments, in the suction assembly 100, the distal end of the controllable section 10a of the suction tube 10 is directly fixedly connected to the shell wall of the docking member 20 through a rigid structure.

[0102] According to some optional embodiments, such as Figure 2 As shown, in the suction assembly 100, the middle section of the suction tube 10, at the controllable section 10a, does not have a control mechanism for assisting human finger control. Instead, the controllable section 10a is laterally bent or axially moved by direct lateral or axial driving of the human finger, thereby causing the proximal end of the suction tube 10 to move axially relative to the cavity 21 of the docking member 20 to switch the working state. In order to enable direct operation by human finger after the suction assembly 100 is installed on the endoscope handle housing 200, a window exposing the controllable section 10a is generally provided on the handle housing 200.

[0103] According to some alternative embodiments, in order to more conveniently drive the suction tube 10 to switch working states, refer to Figure 11 The suction assembly 100 includes a suction tube 10, a docking member 20, and a control member 30. The control member 30 is located entirely to the side of the suction tube 10 and is mounted on the shell wall of the docking member 20 or, like the docking member 20, is fixedly mounted on the endoscope's handle housing 200. The control member 30 has a tail end near the suction tube 10 and a head end away from the suction tube 10. The tail end of the control member 30 is connected to the outer wall of the controllable section 10a of the suction tube 10. The control member 30 can be controllably moved back and forth in a direction between its head and tail ends. The head end of the control member 30 is used to receive pressure from a human finger to move towards its tail end, thereby applying lateral force to the controllable section 10a through its tail end to push the controllable section 10a to bend laterally. For example, the control member 30 can push the controllable section 10a from... Figure 14 The straight shape in the middle changes to, for example Figure 15 and Figure 16 The bending shape shown; the straight shape. Figure 13 and Figure 14In the suction assembly 100 shown, the proximal end of the suction tube 10 is at the first insertion depth relative to the cavity 21, and the suction assembly 100 is in a non-suction working state; in the bent state, Figure 16 In the suction assembly 100 shown, the proximal end of the suction tube 10 is at the second insertion depth relative to the cavity 21, and the suction assembly 100 is in the suction working state.

[0104] For example, the control member 30 is configured as a rigid rod that can be movably connected to the shell wall of the docking member 20 or to the handle housing 200 of the endoscope. The rod can move in a straight line, and the tail end of the rod can directly contact the outer peripheral wall of the controllable section 10a of the suction tube 10, or it can be fixedly connected to the outer peripheral wall of the controllable section 10a by means of glue or the like. By pressing down on the head end of the rod with a human finger, the suction tube 10 can be bent forward towards the tail end of the rod. If the controllable section 10a of the suction tube 10 is an elastic tube with a certain elasticity, the force for the rod to return from the tail end to the head end is provided by the elastic return force of the elastically bent controllable section 10a of the suction tube 10. If the controllable section 10a of the suction tube 10 does not have sufficient elasticity to drive the rod to return, the axial pulling force applied to the head end of the rod by a human finger can also help the rod return.

[0105] According to some optional embodiments, such as Figure 12 and Figure 14 As shown, the control component 30 is configured as an assembly, including a push rod 31, a mounting box 32, and a return spring 33; the mounting box 32 is used to fix the handle housing 200 of the endoscope; the push rod 31 passes through the mounting box 32 and abuts against the outer wall of the controllable section 10a at its tail end, and the top of the push rod 31 is configured as an enlarged pressure cap; the return spring 33 is installed inside the mounting box 32, with its top end abutting against the head end of the push rod 31 and its bottom end abutting against the mounting box 32.

[0106] In some embodiments, such as Figure 12 As shown, the tail end of the push rod 31 is configured as a crescent-shaped fork extending circumferentially around the controllable section 10a. The fork abuts against the controllable section 10a to obtain sufficient contact surface, which can prevent the controllable section 10a from being crushed or bent at the stress point.

[0107] According to some optional embodiments, the suction assembly 100, in addition to the control element 30, also includes a connector 40, such as... Figure 12 - Figure 15 As shown, the proximal end of connector 40 is connected to the proximal end of controllable section 10a, and the distal end of connector 40 is connected to the tail end of control member 30. Connector 40 is capable of transmitting tensile force, see reference. Figure 14 and Figure 16During the process of the controllable segment 10a bending laterally due to the lateral force applied by the controllable segment 10a by the controllable segment 30, the tail end of the controllable segment 30 pulls the distal end of the connector 40, thereby causing the proximal end of the connector 40 to pull the proximal end of the controllable segment 10a away from the distal opening of the cavity 21, thus adjusting the insertion depth of the proximal end of the suction tube 10 relative to the cavity 21. The connector 40 assists in the movement of the proximal end of the suction tube 10 to accurately reach the desired position, which can improve the control accuracy of the controllable segment 30.

[0108] In some embodiments, the connector 40 cannot transmit thrust. In this case, the connector 40 can be configured as a flexible rope, and the proximal and distal ends of the connector 40 can be connected to the corresponding components by means of bolting, gluing, etc.

[0109] In other embodiments, the connector 40 is capable of transmitting both tensile and thrust forces simultaneously, and the connector 40 is configured as follows: Figure 12 The rigid connecting rod has its two ends hinged to the tail end of the control member 30 and the proximal end of the controllable section 10a, respectively. To facilitate the connection between the connecting rod and the proximal end of the controllable section 10a, a fixing ring 106 can be fixedly sleeved at the controllable section 10a. The fixing ring 106 is provided with ears, and the proximal end of the connecting rod is hinged to the ears on the fixing ring 106 via a shaft.

[0110] According to some optional embodiments, such as Figure 12 As shown, the connector 40 is configured as a rigid link capable of transmitting tension and thrust. A retaining ring 106 is fixedly fitted at the proximal end of the controllable section 10a, and an ear is provided on the retaining ring 106. The proximal end of the link is hinged to the ear on the retaining ring 106 via a shaft. The distal end of the connector 40 is hinged to an ear provided at the tail end of the control member 30.

[0111] Because the controllable section 10a is flexible, or the entire suction tube 10 is flexible, bending of the controllable section 10a will cause the section of the suction tube 10 located at the distal opening of the cavity 21 of the docking member 20 to bend as well. This may increase the contact pressure between the docking members 20, making movement difficult. It may also cause the controllable section 10a or the proximal portion of the suction tube 10 to be accidentally stretched or torn, or result in difficulty in positioning the proximal end of the suction tube 10 and unclear switching of working states. To avoid the above situations, such as... Figure 12 and Figure 17 As shown, a guide structure is used between the retaining ring 106 and the docking member 20 to allow the retaining ring 106 to move axially relative to the docking member 20, so as to keep the suction tube 10 in a position at the distal opening of the docking member 20. Figure 16The straight shape shown. For example, the outer peripheral wall of the retaining ring 106 is provided with an axially extending groove 107, and the shell wall of the docking member 20 is provided with an axially extending guide block 27 at the distal end. The guide block 27 and the groove 107 slide in an axial direction to limit the axial movement of the retaining ring 106.

[0112] According to some optional embodiments, the inner circumferential surface of the fixing ring 106 sleeved on the suction tube 10 is attached and fixed to the outer circumferential wall of the proximal part of the controllable section 10a, so that the fixing ring 106 can maintain the tube shape of the proximal end of the controllable section 10a.

[0113] According to some optional embodiments, such as Figure 1 - Figure 12 As shown, the docking part 20 is configured as a negative pressure suction nozzle. The docking part 20 has a protruding negative pressure connector 23 at the location of the negative pressure suction hole 22. The negative pressure connector 23 provides a tubular wall formed around the axis of the negative pressure suction hole 22, allowing the negative pressure suction hole 22 to extend axially from the inner peripheral wall of the cavity 21 to the tip face of the negative pressure connector 23. The negative pressure connector 23 is used to connect to the connecting hose provided by the negative pressure source to achieve connection with the negative pressure source.

[0114] In this embodiment, the suction assembly 100 directly connects the suction tube 10 to the negative pressure suction nozzle, eliminating the need for connecting the suction tube 10 to the suction valve and the negative pressure suction nozzle to the suction valve. This greatly simplifies the assembly process of the suction assembly 100, improves assembly efficiency, and reduces production costs.

[0115] The suction assembly 100 reduces the number of docking parts. After the suction tube 10 is docked (inserted) with the docking part 20 or with the Y-type connector 300, during the installation process on the endoscope handle housing 200, only the attitude of the docking part 20 or the Y-type connector 300 needs to be paid attention to. This makes it easier to control the attitude of the suction assembly 100 itself and the docking parts, and it is less likely to cause the suction tube 10 to fall off. The assembly efficiency of the suction assembly 100 will be higher.

[0116] According to some optional embodiments, such as Figure 1 - Figure 4 , Figure 6 , Figure 11 , Figure 12 and Figure 17As shown, the axis of the atmospheric vent 24 on the docking member 20 is parallel to the axis of the negative pressure suction vent 22. Simultaneously, the docking member 20 has a protruding atmospheric tube 25 at the location of the atmospheric vent 24. The atmospheric tube 25 provides a tubular wall forming around the axis of the atmospheric vent 24, allowing the atmospheric vent 24 to extend axially from the inner peripheral wall of the cavity 21 to the tip face of the atmospheric tube 25. The outer wall of the atmospheric tube 25 is connected to the outer wall of the negative pressure connector 23 to form an integral structure, causing the atmospheric tube 25 to protrude radially from the outer wall of the negative pressure connector 23, forming a foolproof structure.

[0117] In some embodiments, such as Figure 2 As shown, the atmospheric tube 25 is thinner than the negative pressure tube connector 23.

[0118] like Figure 17 As shown, the endoscope handle housing 200, used to mount the docking component 20, has a perforated post 202. The inner hole of the perforated post 202 is designed to mimic the shape of the atmospheric column 25 and the negative pressure connector 23 to form a foolproof structure. When the docking component 20 is mounted onto the endoscope handle housing 200, the negative pressure connector 23 and the atmospheric column 25 of the docking component 20... Figure 17 As shown, it is inserted into the contoured inner hole of the post 202 to prevent rotation and limit movement.

[0119] According to some optional embodiments, such as Figure 3 , Figure 7 , Figure 9 and Figure 14 As shown, the cavity 21 inside the docking member 20 extends axially from the distal end face of the docking member 20 to the proximal end face of the docking member 20. The inner diameter of the cavity 21 is larger than the outer diameter of the distal and middle sections of the suction tube 10 and smaller than the size of all or part of the proximal section of the suction tube 10.

[0120] In some embodiments, such as Figure 3 - Figure 6 As shown, the outer peripheral wall of the proximal end of the suction tube 10 is provided with an annular protrusion 11, and the outer diameter of the annular protrusion 11 is larger than the inner diameter of the cavity 21 at the location where the annular step 213 is provided.

[0121] In other embodiments, such as Figure 9 and Figure 10 As shown, a limiting protrusion 104 is provided on the outer peripheral wall of the proximal end of the suction tube 10. The outer diameter of the limiting protrusion 104 is larger than the inner diameter of the stop protrusion 211 provided at the distal opening of the cavity 21 at the docking member 20.

[0122] In other embodiments, such as Figure 7 and Figure 8As shown, the outer peripheral wall of the proximal end of the suction tube 10 is provided with an annular protrusion 11, and the outer diameter of the annular protrusion 11 is larger than the inner diameter of the stop protrusion 211 provided at the distal opening of the cavity 21 at the docking member 20.

[0123] In the above embodiments, if the proximal end of the suction tube 10 is an elastic tube, it would be difficult to axially insert the proximal end of the suction tube 10 into the cavity 21 from the distal opening of the docking member 20. The proximal end of the suction tube 10 would need to be flattened before insertion. If the proximal end of the suction tube 10 has poor elasticity, insufficient shape recovery may occur after flattening and insertion into the cavity 21. To avoid these problems, this embodiment specifically axially extends the cavity 21 of the docking member 20, allowing the suction tube 10 to be inserted into the cavity 21 by axially extending its distal end through the cavity 21 from the proximal end face of the docking member 20.

[0124] After the proximal end of the suction tube 10 is inserted into the cavity 21, a plug 26 is inserted into the proximal end of the docking member 20 and fixed to the proximal end of the cavity 21 to axially seal the proximal end of the cavity 21.

[0125] Some alternative embodiments, such as Figure 3 - Figure 5 As shown, the mating member 20 has an axially penetrating insertion hole extending from the proximal end to the distal end. A plug 26 is installed at the proximal opening of the insertion hole, sealing the proximal end of the insertion hole to form a cavity 21 with a proximal end blockage and a distal end opening. The proximal end port 101 of the suction tube 10 is formed on the proximal end face of the suction tube 10. At a first insertion depth, the proximal end port of the suction tube 10 is axially abutted against the plug 26 and sealed. At a second insertion depth, the proximal end port 101 of the suction tube 10 is axially disengaged from the plug 26.

[0126] According to some optional embodiments, such as Figure 6 As shown, the cavity 21 within the mating member 20 is configured as a blind hole, such that the proximal end of the cavity 21 is closed by the shell wall of the mating member 20, forming a closed end face 212 facing the distal end. The proximal end port 101 of the suction tube 10 is formed on the proximal end face of the suction tube 10. (Reference) Figure 3 and Figure 4 At the first insertion depth, the proximal port 101 will be axially blocked against the closed end face 212 at the proximal end of the cavity 21. At the second insertion depth, the proximal port 101 will... Figure 6 As shown, the axially disengaged cavity 21 is near the closed end face 212.

[0127] On the other hand, the present invention provides an operating unit, such as Figure 13 , Figure 15 and Figure 17As shown, the operating unit includes a handle housing 200, a Y-connector 300, and the suction assembly 100 in any of the above embodiments. The housing of the endoscope's operating unit is generally formed by the mating of two handle housings 200. To demonstrate the suction assembly 100 inside the operating unit's housing, Figure 13 , Figure 15 and Figure 17 Only a portion of the handle housing 200 is shown. The mating part 20 of the suction assembly 100 is fixedly mounted to the handle housing 200, and the distal end of the suction tube 10 is mated and fixedly mounted to the proximal end of the Y-type connector 300 on the handle housing 200.

[0128] According to some optional embodiments, refer to Figure 17 and Figure 1 The negative pressure connector 23 and atmospheric column 25 of the docking part 20 form a foolproof structure that inserts into the hole column 202 from the inside of one of the handle housings 200 and extends to the outside of the handle housing 200. The negative pressure connector 23 is used to connect a hose and then connect to a negative pressure source through the hose.

[0129] According to some alternative embodiments, the suction tube 10 of the suction assembly 100 is controlled by axial movement or lateral bending to move the proximal end of the suction tube 10 axially relative to the cavity 21, and is not equipped with, for example, Figure 11 or Figure 12 The control element 30 is shown. In this case, for easier use after the suction assembly 100 is installed on the endoscope handle housing 200, a window is provided on the handle housing 200 to expose the side of the suction tube 10. A person's fingers can drive the proximal end of the suction tube 10 axially relative to the cavity 21 of the docking member 20 by pulling or pressing the middle section of the suction tube 10 inside the window. In some embodiments, the window is positioned near the distal end of the docking member 20 to expose the portion of the middle section of the suction tube 10 near the distal end of the docking member 20. This allows the control parts on the suction tube 10 to be closer to the docking member 20, resulting in better responsiveness of the proximal end of the suction tube 10.

[0130] According to some alternative embodiments, the suction assembly 100 is provided with a control element 30, which is fixedly mounted on the handle housing 200 and can move relative to the handle housing 200.

[0131] According to some alternative embodiments, the docking part 20 of the suction assembly 100 is as follows: Figure 13 It is positioned at the proximal end of the handle housing 200 and close to the traction assembly 500, as shown.

[0132] On the other hand, the present invention provides an endoscope, such as Figure 1As shown, the endoscope includes an insertion portion 400 and an operating portion in any of the above embodiments. The insertion portion 400 is mounted on the handle housing 200 and connected to the distal end of the Y-connector 300.

[0133] The endoscopes involved in the embodiments of this application may be bronchoscopes, pyeloscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc. The embodiments of this application do not specifically limit the types of endoscopes.

[0134] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0135] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0136] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An aspiration assembly for an endoscope, characterized by: The application relates to a suction tube (10) which axially extends from a proximal end to a distal end and is provided with a proximal end port at the proximal end and a distal end port at the distal end; a docking piece (20) which is provided with a cavity (21) axially invaginated from the distal end to the proximal end and a negative pressure suction hole (22) and an atmospheric hole (24) respectively connecting the cavity (21) with the outside world; wherein the proximal end of the suction tube (10) is axially movably inserted into the cavity (21) so as to be adjustable relative to the cavity (21) between a first insertion depth and a second insertion depth; in the case of the first insertion depth, the negative pressure suction hole (22) and the atmospheric hole (24) are in fluid communication through the cavity (21), the proximal end port of the suction tube (10) is in the cavity (21), and the suction assembly is in a non-suction working state; in the case of the second insertion depth, the proximal end port of the suction tube (10) is in fluid communication with the negative pressure suction hole (22) through the cavity (21), the proximal end of the suction tube (10) is in sealing cooperation with the cavity (21) on the fluid communication path between the negative pressure suction hole (22) and the atmospheric hole (24) so as to make the negative pressure suction hole (22) and the atmospheric hole (24) fluidly disconnected, and the suction assembly is in a suction working state. During the adjustment of the proximal end of the suction tube (10) relative to the cavity (21) between the first insertion depth and the second insertion depth, the proximal end port and the distal end port of the suction tube (10) are in fluid communication; and / or the proximal end of the suction tube (10) is provided as an elastic tube body; and / or along the axial direction of the cavity (21), the negative pressure suction hole (22) and the atmospheric hole (24) are sequentially arranged from the proximal end to the distal end, the first insertion depth is greater than the second insertion depth; and / or the proximal end port is arranged at the proximal end face of the suction tube (10); and / or the inner diameter size of the cavity (21) is greater than the outer diameter size of the distal end and the middle section of the suction tube (10) and is smaller than the outer diameter size of the whole tube section or part of the tube section of the proximal end of the suction tube (10), the cavity (21) axially penetrates through the docking piece (20), the proximal end of the suction tube (10) is installed in the cavity (21) in a mode that the distal end of the suction tube (10) penetrates into the proximal end of the cavity (21), and the proximal end of the docking piece (20) is fixedly installed with a plug (26) axially blocking the proximal end of the cavity (21); 2. A suction assembly according to claim 1, wherein: and / or the proximal end port is formed at the proximal face of the suction tube (10), in the case of the first insertion depth, the proximal end port axially abuts against the proximal end of the cavity (21) which is blocked, and in the case of the second insertion depth, the proximal end port axially separates from the proximal end of the cavity (21). ​ ​ ​ ​ ​ And / or, the outer peripheral wall of the proximal end of the suction tube (10) is provided with a circumferential annular protrusion (11), the inner peripheral wall of the cavity (21) is provided with a circumferential annular step (213), wherein, in the first insertion depth condition, the annular protrusion (11) is axially separated from the annular step (213) to make the negative pressure suction hole (22) and the atmosphere hole (24) fluidly connected through the cavity (21), and in the second insertion depth condition, the annular protrusion (11) is in axial abutment with the annular step (213) to form an axial seal to make the negative pressure suction hole (22) and the atmosphere hole (24) fluidly disconnected.

3. A suction assembly according to claim 1, wherein: At least part of the tube segment between the proximal end and the distal end of the suction tube (10) is provided as a flexible controllable segment (10a), which can be laterally bent to pull the proximal end of the suction tube (10) to move axially relative to the cavity (21) to switch the working state under the action of a lateral force.

4. A suction assembly according to claim 3, wherein: At least part of the tube segment of the suction tube (10) connected to the distal end of the controllable segment (10a) is provided as a rigid tube body or a flexible tube; And / or, the controllable segment (10a) can be elastically bent laterally under the action of a lateral force; And / or, the proximal end of the suction tube (10) is a tube segment connected to the proximal end of the controllable segment (10a) for fluid communication; And / or, the distal end of the controllable segment (10a) is fixedly arranged relative to the docking piece (20).

5. A suction assembly according to claim 3 or 4, wherein: Further comprising a control member (30) which can be controlled to reciprocate in the direction between its head end and tail end, the tail end of the control member (30) is connected to the outer wall of the controllable segment (10a), and the head end of the control member (30) is used to receive a driving force towards its tail end to make its tail end push the controllable segment (10a) to give the controllable segment (10a) a lateral force.

6. A suction assembly according to claim 5, wherein: Further comprising a connecting member (40), the proximal end and the distal end of the connecting member (40) are respectively connected to the proximal end of the controllable segment (10a) and the tail end of the control member (30); In the process of the control member (30) giving the controllable segment (10a) a lateral force to make the controllable segment (10a) laterally bend, the proximal end of the connecting member (40) can pull the proximal end of the controllable segment (10a) away from the cavity (21) gradually to adjust the insertion depth of the proximal end of the suction tube (10) relative to the cavity (21).

7. A suction assembly according to claim 1, wherein: The docking piece (20) is provided with a negative pressure pipe joint (23) formed around the axis of the negative pressure suction hole (22) for connection with a negative pressure source.

8. A suction assembly according to claim 7, wherein: The axis of the atmosphere hole (24) is parallel to the axis of the negative pressure suction hole (22), and the docking piece (20) is provided with an atmosphere pipe column (25) formed around the axis of the atmosphere hole (24), which protrudes radially from the outer side wall of the negative pressure pipe joint (23).

9. An operating portion characterized by comprising: The suction device comprises a handle shell (200), a Y-shaped connector (300) and the suction assembly (100) as claimed in any one of claims 1-8, the docking part (20) of the suction assembly (100) is fixedly installed on the handle shell (200), and the distal end of the suction tube (10) is docked with the proximal end of the Y-shaped connector (300).

10. An endoscope characterized by: The suction device comprises an insertion part (400) and the operating part as claimed in claim 9, the insertion part (400) is installed on the handle shell (200) and connected with the distal end of the Y-shaped connector (300).

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