An aspiration valve, aspiration assembly, and endoscope

Abstract

The application provides an attraction valve, an attraction assembly and an endoscope, relates to the technical field of endoscopes, and solves the sealing stability hidden danger of a sealing ring in the prior art. The valve rod of the attraction valve can be repeatedly switched in the axial direction relative to the valve cavity to switch the suction state; the bottom end in the axial direction of the valve cavity is provided with an abutting surface; the outer peripheral wall of the valve rod is provided with an axially compressible deformation groove, and a sealing ring that axially supports the deformation groove and radially seals the inner peripheral wall of the valve cavity is installed in the deformation groove; when the valve rod is axially extruded, the valve rod can axially compress the deformation groove to axially extrude the sealing ring in the deformation groove to make the sealing ring radially outwardly elastically deform and press the inner peripheral wall of the valve cavity; in the first position, the bottom end of the valve rod is separated from the abutting surface and axially stretched, and is in a pause state; in the second position, the bottom end of the valve rod axially extrudes the abutting surface to axially compress the deformation groove, and is in a suction state. The application can reconcile the contradiction between the easy installation of the sealing ring and the sealing stability to some extent, and eliminate the sealing stability hidden danger of the sealing ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of endoscopes, in particular to an aspiration valve, an aspiration assembly and an endoscope. BACKGROUND

[0002] Endoscopes are generally used to insert an insertion portion into a body cavity through a natural or artificial opening on the human body to observe, treat or sample, etc. Some endoscopes are equipped with an aspiration valve to control the suction of body fluids, stones, tissues, etc. in the body cavity, such as a suction bronchoscope that controls the suction of sputum in the trachea and bronchus at the right time through the aspiration valve.

[0003] Some aspiration valves currently use high-precision shaft-hole cooperation between the valve stem and the valve shell to achieve sealing to smoothly implement the state switching of the valve. The valve stem and the valve shell of such an aspiration valve require very high manufacturing and assembly precision, and the cost is very high, which is mostly used in reusable endoscopes. In order to reduce the cost and make it more suitable for disposable endoscopes, some aspiration valves reduce the manufacturing precision of the valve stem and the valve shell, reduce the diameter of the valve stem, and cover it with multiple sealing rings to achieve sealing through the sealing ring and the valve shell. For example, in the endoscope suction bronchoscope of JP2025523259A, the manufacturing precision requirements of the valve stem and the valve body are reduced, and sealing is achieved through three sealing rings arranged in sequence along the axial direction of the valve stem. Although such an aspiration valve greatly reduces the manufacturing cost to a certain extent, it makes it difficult to reconcile the ease of installation and the sealing stability of the sealing ring, and there is a hidden danger in the sealing stability of the aspiration valve. SUMMARY

[0004] The purpose of the present application is to design an aspiration valve, an aspiration assembly and an endoscope to solve the problem of sealing stability of the sealing ring.

[0005] The present application is achieved by the following technical solutions:

[0006] On the one hand, the present application provides an aspiration valve, comprising a valve shell, a valve stem installed in the valve cavity thereof, and a sealing ring, the valve stem can be repeatedly switched between a first position and a second position in the axial direction of the valve cavity to switch the suction state; the bottom end of the valve cavity is provided with an abutting surface; the outer peripheral wall of the valve stem is provided with an axially compressible deformation groove, and the sealing ring axially supporting the deformation groove and radially sealingly contacting the inner peripheral wall of the valve cavity is installed in the deformation groove; the valve stem can axially compress the deformation groove to axially extrude the sealing ring therein to make it radially outwardly elastically deform and press contact the inner peripheral wall of the valve cavity when the valve stem is axially extruded; in the first position, the bottom end of the valve stem is separated from the abutting surface, and is in a paused state; in the second position, the bottom end of the valve stem axially extrudes the abutting surface to axially compress the deformation groove, and is in an aspiration state.

[0007] When the valve rod is axially stressed to compress the deformation groove on the outer circumferential wall, the sealing ring arranged in the deformation groove can be radially deformed outwardly under the axial pressure of the deformation groove, so as to enhance the sealing effect of the sealing ring on the valve cavity arranged in the valve shell. During the cooperation of the valve rod and the valve cavity provided with the abutting surface at the bottom end, when the valve rod is controlled to move from the first position to the second position relative to the valve cavity, the suction state is switched from the pause state to the suction state, at this time, the bottom end of the valve rod is abutted on the abutting surface and is axially stressed, so that the valve rod can axially compress the deformation groove to enhance the sealing effect on the valve cavity through the radial deformation of the sealing ring. Therefore, the suction valve has the characteristics that the sealing performance of the sealing ring can be compensated, so that the suction valve can reconcile the contradiction between the easy installation and the sealing stability of the sealing ring to a certain extent, and under the condition of ensuring the stability of the sealing performance, the assembly precision requirement between the sealing ring, the valve rod and the valve cavity can be further appropriately reduced.

[0008] In a second aspect, the present application provides a suction assembly, which comprises a suction nozzle, a suction pipe and a suction valve, one end of the suction nozzle is connected to an exhaust port arranged in the suction valve, and one end of the suction pipe is connected to a suction port arranged in the suction valve.

[0009] In a third aspect, the present application provides a endoscope, which comprises a handle shell and a suction assembly mounted on the handle shell.

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

[0011] In the present application, in the suction valve for the endoscope, the valve rod is arranged as a rod member which can be axially stressed to axially compress the deformation groove arranged on the outer circumferential wall, so that the sealing ring arranged in the deformation groove can be radially deformed outwardly under the axial pressure of the deformation groove, so as to enhance the sealing effect of the sealing ring on the valve cavity arranged in the valve shell. During the cooperation of the valve rod and the valve cavity provided with the abutting surface at the bottom end, when the valve rod is controlled to move from the first position to the second position relative to the valve cavity, the suction state is switched from the pause state to the suction state, at this time, the bottom end of the valve rod is abutted on the abutting surface and is axially stressed, so that the valve rod can axially compress the deformation groove to enhance the sealing effect on the valve cavity through the radial deformation of the sealing ring. Therefore, the suction valve has the characteristics that the sealing performance of the sealing ring can be compensated, so that the suction valve can reconcile the contradiction between the easy installation and the sealing stability of the sealing ring to a certain extent, and under the condition of ensuring the stability of the sealing performance, the assembly precision requirement between the sealing ring, the valve rod and the valve cavity can be further appropriately reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0013] Figure 1 is a schematic view of the appearance of an endoscope of the present application;

[0014] Figure 2 shows the structure of the suction assembly installed inside the handle of the endoscope;

[0015] Figure 3 is a schematic view of the partial sectional structure of the suction assembly, in which the suction valve is in a pause state;

[0016] Figure 4 is a schematic view of the appearance of the suction valve, in which the suction valve is in a suction state;

[0017] Figure 5 is a sectional view of the suction valve shown in Figure 4 ;

[0018] Figure 6 is a schematic view of the structure of the valve rod;

[0019] Figure 7 the structure shown in Figure 6 removes the sealing ring in the deformation groove on the side of the top end of the shaft ring and the sealing ring in the installation groove;

[0020] Figure 8 the structure shown in Figure 6 removes the sleeve;

[0021] Figure 9 the structure shown in Figure 8 removes the sealing ring;

[0022] Figure 10 is a schematic view of the structure of the sealing ring;

[0023] Figure 11 the structure shown in Figure 4 removes the sleeve provided with the cap;

[0024] Figure 12 the structure shown in Figure 11 removes the sleeve shell and the reset spring;

[0025] Figure 13 is a schematic view of the structure of the sleeve shell.

[0026] in the drawings is:

[0027] 100, suction valve;

[0028] 10, valve housing; 101, core housing; 102, cover housing; 11, valve cavity; 12, abutting surface; 13, suction port; 14, discharge port; 15, atmosphere port; 151, turning section; 16, ring groove; 17, flange part;

[0029] 20, valve rod; 201, deformation groove; 202, mounting groove;

[0030] 21, center rod; 211, shaft ring; 212, clamping groove; 213, insertion hole; 214, switching flow channel;

[0031] 22, sleeve;

[0032] 23, cap; 231, guide wall; 232, column;

[0033] 25, reset spring;

[0034] 30, sealing ring; 31, skirt;

[0035] 200, suction nozzle; 300, suction tube; 400, tee joint; 500, traction wheel; 600, insertion part;

[0036] 800, suction assembly; 900, handle housing;

[0037] 1000, endoscope;

[0038] a, mounting gap; b, first gap; c, second gap. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0040] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] 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 thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and are not limited in number, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the front and rear associated objects are in an "or" relationship. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mount", "connect", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative position of each component to the user in the use environment, wherein the end closer to the user is designated as "proximal end", and the end farther away from the user is designated as "distal end".

[0043] The present application relates to the technical field of endoscopes, in particular to a suction valve, the distal end of which is used to connect a suction tube to communicate with an instrument tube, and the proximal end of which is used to connect a suction nozzle to communicate with various negative pressure sources including a negative pressure pump, and the suction valve switches between a suction state and a pause state by artificially controlling the position of a valve rod. In the pause state, the valve rod closes the proximal end of the suction tube, and the suction valve communicates the negative pressure source, the suction nozzle and an air port, so that the negative pressure generated by the negative pressure source does not act on the suction tube, thereby failing to allow the negative pressure to act on the instrument tube, and having no suction effect on the tissue, liquid, stones, etc. on the distal end side of the instrument tube. In the suction state, the valve rod opens the proximal end of the suction tube and closes the air port, and the suction valve communicates the negative pressure source, the suction nozzle and the suction tube, so that the negative pressure generated by the negative pressure source can act in the instrument tube, and the tissue, liquid, stones, etc. on the distal end side of the instrument tube can be sucked into the instrument tube and sequentially discharged to a collection container arranged at the proximal end through the instrument tube, the suction tube, the suction valve and the suction nozzle.

[0044] The valve rod in the suction valve according to the present application can use axial extrusion force to cause the sealing ring arranged thereon to be axially extruded and radially deformed outward, thereby to a certain extent compensating for the sealing pressure of the sealing ring in the valve cavity of the suction valve and ensuring the stability of the sealing.

[0045] The following will be described in conjunction with the accompanying drawings Figures 1 to 13The application will be described in detail through specific embodiments and application scenarios.

[0046] In one aspect, the application provides an aspiration valve 100 for an endoscope 1000, as shown in Figure 2 Figure 5 As shown in

[0047] As shown in Figure 5 The aspiration valve 100 includes a valve housing 10, a valve rod 20, and a sealing ring 30. The valve housing 10 is provided with a valve cavity 11, and is further provided with an intake port 13, an exhaust port 14, and an atmosphere port 15 that communicate with the valve cavity 11. When the aspiration valve 100 is installed in the endoscope 1000, the intake port 13 of the valve housing 10 is connected to the proximal port of the suction tube 300, the exhaust port 14 is connected to the distal port of the suction nozzle 200, and the atmosphere port 15 is in communication with the external environment. Figure 5 In some embodiments, the intake port 13, the exhaust port 14, and the atmosphere port 15 are respectively connected to three different positions in the valve cavity 11, and the atmosphere port 15, the intake port 13, and the exhaust port 14 are arranged in sequence from the top end to the bottom end along the axial direction of the valve cavity 11. Of course, the specific arrangement position and specific direction of each channel in the valve housing 10 are not limited to the form shown in Figure 5 In some embodiments, the specific arrangement position and specific direction of each channel in the valve housing 10 are not limited to the form shown in

[0048] Of course, in some specific embodiments, the atmosphere port can also be omitted on the valve housing 10 and formed on the valve rod 20 to form an atmosphere hole that communicates with the adapter flow channel 214. Such a structure of the valve rod 20 is common in the prior art.

[0049] As shown in Figure 5 The valve rod 20 is internally provided with an adapter flow channel 214 that is always in communication with the exhaust port 14 in the valve housing 10 and selectively communicates with the atmosphere port 15 and the intake port 13 in the valve housing 10.

[0050] The valve rod 20 is installed in the valve cavity 11 of the valve housing 10, and a certain number of sealing rings 30 are sleeved on the valve rod 20 in the valve cavity 11, so that the valve rod 20 can artificially switch the suction state of the aspiration valve 100 by adjusting the position of the valve rod 20 relative to the valve cavity 11 after the valve rod 20 is matched with the valve cavity 11.

[0051] The valve rod 20 can be repeatedly switched between the first position and the second position in the axial direction relative to the valve cavity 11 to switch the suction state. Figure 3 ​In the structure of the suction valve 100 shown, the valve stem 20 is in the first position relative to the valve cavity 11, and the suction valve 100 is in the suspended state. At this time, one end of the adapter flow passage 214 provided in the valve stem 20 is in communication with the atmosphere port 15 provided in the valve housing 10, and the other end is in communication with the discharge port 14 provided in the valve housing 10. The suction port 13 provided in the valve housing 10 is blocked by the outer peripheral wall of the valve stem 20 and is sealed by the sealing ring 30 around the port. Figure 5 In the structure of the suction valve 100 shown, the valve stem 20 is in the second position relative to the valve cavity 11, and the suction valve 100 is in the suction state. At this time, one end of the adapter flow passage 214 provided in the valve stem 20 is in communication with the suction port 13 provided in the valve housing 10, and the other end is in communication with the discharge port 14 provided in the valve housing 10. The suction port 13 is simultaneously sealed by the sealing ring 30 around the port, and the atmosphere port 15 is blocked by the outer peripheral wall of the valve stem 20 to disconnect the atmosphere port 15 from the adapter flow passage 214.

[0052] In some embodiments, the atmosphere port 15 can also be omitted from the valve housing 10 and formed in the valve stem 20 to form an atmosphere hole in communication with the adapter flow passage 214. During the axial movement of the valve stem 20 relative to the valve housing 10, when the valve stem 20 is in the initial position, similar to the first position in some embodiments in which the atmosphere port 15 is formed in the valve housing 10, the atmosphere hole in the valve stem 20 protrudes out of the valve housing 10 or is not shielded by the valve housing 10, and the adapter flow passage 214 can establish a communication relationship with the external environment through the atmosphere hole. At this time, the suction state of the suction valve 100 is in the suspended state. When the valve stem 20 is depressed to a certain position, the atmosphere hole provided in the valve stem 20 will be deep into the valve housing 10 and be closed by a structure on the valve housing 10, such as the peripheral wall of the valve cavity 11 or other structures, so that the adapter flow passage 214 can no longer communicate with the external environment through the atmosphere hole. At this time, the adapter flow passage 214 will be in communication with the suction port 13, and the suction state of the suction valve 100 is in the suction state.

[0053] In this embodiment, as shown in Figure 3 The valve housing 10 forms a step at the bottom end in the axial direction of the valve cavity 11. One end of the step forms an abutting surface 12 located in the movement direction of the valve stem 20. When the valve stem 20 moves to the second position as shown in Figure 5 , the valve stem 20 can axially abut against the abutting surface 12 to deform under the axial pressing force.

[0054] As shown in Figure 7As shown, the outer peripheral wall of the valve stem 20 is provided with a deformation groove 201. The deformation groove 201 can be axially compressed and deformed to reduce the groove width when subjected to an axial extrusion force. A sealing ring 30 is installed in the deformation groove 201 and is sleeved on the valve stem 20. The sealing ring 30 is axially supported in the deformation groove 201 to maintain the groove width of the deformation groove 201, and the outer peripheral surface of the sealing ring 30 is in radial sealing contact with the inner peripheral wall of the valve cavity 11.

[0055] The two ends of the sealing ring 30 axially support the deformation groove 201 while being in sealing contact with the corresponding side walls of the deformation groove 201.

[0056] When the valve stem 20 is subjected to an axial extrusion, the deformation groove 201 can be axially compressed and deformed, so that the axially compressed and deformed deformation groove 201 can axially extrude the sealing ring 30 therein, so that the sealing ring 30 is elastically deformed radially outward, further pressing against the inner peripheral wall of the valve cavity 11, increasing the tightness while also increasing the contact area. When the valve stem 20 is in the first position relative to the valve cavity 11 as shown in Figure 3 , the bottom end of the valve stem 20 is separated from the abutting surface 12 and is axially stretched, and the suction state of the suction valve 100 is in a suspended state. When the valve stem 20 is in the second position relative to the valve cavity 11 as shown in Figure 5 , the bottom end of the valve stem 20 contacts the abutting surface 12 and axially extrudes the abutting surface 12 to axially compress the deformation groove 201, and at this time the suction state of the suction valve 100 is in a suction state.

[0057] The valve stem 20 in the suction valve 100 can be a press-type axially moving rod body, or a rotary-type axially moving rod body.

[0058] The valve stem 20 of the suction valve 100 of the present embodiment is arranged to be axially compressed to compress the deformation groove 201 arranged on the outer circumferential wall of the valve stem 20, so that the sealing ring 30 arranged in the deformation groove 201 can be radially deformed outwardly by the axial compression of the deformation groove 201 to enhance the sealing effect of the sealing ring 30 on the valve cavity 11 arranged in the valve housing 10. During the cooperation of the valve stem 20 and the valve cavity 11 arranged with the abutting surface 12 at the bottom end, when the valve stem 20 is controlled to move from the first position to the second position relative to the valve cavity 11, the suction state is switched from the pause state to the suction state, at this time, the bottom end of the valve stem 20 abuts on the abutting surface 12 and is axially stressed, so that the valve stem 20 can be axially compressed to compress the deformation groove 201 to enhance the sealing effect on the valve cavity 11 by the radial deformation of the sealing ring 30. Therefore, the suction valve has the characteristic that the sealing performance of the sealing ring 30 can be compensated, so that the suction valve 100 can reconcile the contradiction between the easy installation and the sealing stability of the sealing ring to a certain extent, and in the case of eliminating the sealing performance stability, the assembly precision requirement between the sealing ring 30, the valve stem 20 and the valve cavity 11 can be further appropriately reduced. For example, the assembly tightness requirement between the sealing ring 30 and the valve stem 20 can be appropriately reduced, so that the inner diameter of the sealing ring 30 can be made larger to facilitate the installation on the valve stem 20 in the production process; for example, the assembly tightness requirement between the sealing ring 30 and the valve cavity 11 can be appropriately reduced, so that the outer diameter of the sealing ring 30 can be reduced to reduce the pressure on the valve cavity 11, so that the axial movement of the assembly of the valve stem 20 and the sealing ring 30 can be more smooth; for example, the cooperation gap between the valve stem 20 and the valve cavity 11 can be larger or the machining precision can be further reduced.

[0059] According to some optional embodiments, the inner circumferential surface of the sealing ring 30 arranged at the deformation groove 201 sealingly contacts the circumferential wall of the center rod 21.

[0060] According to some optional embodiments, the valve stem 20 is arranged as a rod member that cannot be axially compressed as a whole, and at the same time, such a valve stem 20 is also an assembled rod member assembled by two types of parts, when axially stressed, one type of part can abut on the abutting surface 12 at the bottom end of the valve cavity 11 and move relative to the other type of part, and the other type of part can pass over the abutting surface 12 to press the sealing ring 30 by the two types of parts without reducing the axial size of the valve stem 20. For example, the valve stem 20 includes a center rod and a movable ring movably sleeved on the center rod, the middle section of the center rod is arranged with a shaft ring, the end surface of the shaft ring is used as a part for limiting the sealing ring, and at the same time, the center rod is arranged with a plurality of axially extending sliding grooves arranged in sequence in the circumferential direction, one end of the movable ring is arranged with a plurality of axially extending finger members arranged in sequence in the axial direction, and the finger members of the movable ring are in one-to-one sliding cooperation with the sliding grooves. The deformation groove is formed between the end of the movable ring and the shaft ring. When the valve stem 20 is in the first position, the movable ring is arranged in the valve cavity 11, and the sealing ring 30 is arranged in the deformation groove 201 formed between the end of the movable ring and the shaft ring. Figure 3In the first position shown, the bottom end of the finger of the movable ring is flush with the bottom end of the center rod, and the valve rod 20 is in the first position shown in Fig. 1. Figure 5 In the second position shown, the finger of the movable ring abuts the plurality of axial protrusions provided on the abutment surface of the valve housing 10, and the axial protrusions extend into the sliding groove one by one and abut the bottom end of the finger one by one, so that the movable ring moves axially relative to the center rod, so that the end of the movable ring can axially extrude the sealing ring positioned and installed on the center rod.

[0061] According to other optional embodiments, the valve rod 20 is provided as an axially compressible rod, so that when the valve rod 20 is in the second position relative to the valve cavity 11 of the valve housing 10, the valve rod 20 can be axially compressed to cause the deformation groove 201 to be axially compressed. For example, the valve rod 20 is an integrally formed rubber rod. For example, the valve rod 20 is an assembled rod assembled by two types of parts, and when axially compressed, one type of part can abut the abutment surface 12 at the bottom end of the valve cavity 11 and move relative to the other type of part to achieve the reduction of the axial size of the valve rod 20, thereby achieving the purpose of axial compression.

[0062] In some optional embodiments in which the valve rod 20 is provided as an axially compressible rod and the valve rod 20 is an assembled rod assembled by two types of parts, as shown in Fig. 2, Figure 5 Figure 9 As shown, the valve rod 20 includes a center rod 21 and a sleeve 22 sleeved thereon, and the sleeve 22 can reciprocate along the axial direction of the center rod 21 to adjust the groove width of the deformation groove 201. As shown in Fig. 3, Figure 9 and Figure 8 As shown, the middle section of the center rod 21 is provided with a collar 211, and at least one end face of the collar 211 is used as a part to limit the sealing ring 30.

[0063] According to requirements, the sleeve 22 can be provided with one or two, so that the center rod 21 is provided with a sleeve 22 axially movably sleeved on the center rod 21 on one end side or both end sides of the collar 211. Figure 5 Figure 8 Specifically, the case in which two sleeves 22 are provided on the center rod 21 is shown, and the end of the sleeve 22 facing the collar 211 forms a deformation groove 201 with the collar 211, so that two deformation grooves 201 are formed on the valve rod 20. By driving the sleeve 22, the sleeve 22 can be moved relative to the center rod 21, and since the sealing ring 30 provided in the deformation groove 201 provides axial support to the deformation groove 201, the sleeve 22 will axially extrude the sealing ring 30 between the corresponding end faces of the collar 211 to elastically deform radially outward.

[0064] ​​To further prevent the sealing ring 30 from being distorted by contacting the inner wall of the valve cavity 11 or being directly deformed by the large friction force between the sealing ring 30 and the valve cavity 11 when the valve stem 20 is axially moved relative to the valve cavity 11, as shown in Figure 9 and Figure 10 , a circumferentially extending annular clamping groove 212 is arranged on the end face of the collar 211, and an axially extending annular skirt 31 is arranged on one end of the sealing ring 30, so that the cross-sectional shape of the sealing ring 30 is approximately L-shaped. After the sealing ring 30 is installed into the deformation groove 201, as shown in Figures 9 to 8 , and in combination with the structure shown in Figure 5 , it can be easily understood that the skirt 31 is clamped into the clamping groove 212 in the axial direction, which can effectively maintain the shape of the sealing ring 30 and help prevent it from being removed from the deformation groove 201.

[0065] According to some optional embodiments, the valve stem 20 is arranged as an axially compressible rod, and the valve stem 20 is an assembled rod assembled by two types of parts. The end of the sleeve 22 away from the collar 211 exceeds the end of the center rod 21.

[0066] In some embodiments in which two sleeves 22 are arranged on the center rod 21 or in some embodiments in which only one sleeve 22 is arranged on the center rod 21 and is arranged on the top end side of the collar 211, the top end of the sleeve 22 arranged on the top end side of the collar 211 of the center rod 21 exceeds the top end of the center rod 21, which can more easily connect components for receiving human fingers or be more easily pressed by human fingers to be controlled to move axially relative to the valve cavity 11. In order to facilitate the human hand to press the top end of the sleeve 22, the part of the top end of the sleeve 22 located outside the valve cavity 11 is provided with a cap 23 for human hand pressing, and the pressing surface of the cap 23 has a diameter greater than that of the valve stem 20.

[0067] In some embodiments in which the sleeves 22 are arranged on both end sides of the collar 211 of the center rod 21, as shown in Figure 3 , the bottom end of the sleeve 22 close to the abutting face 12 exceeds the bottom end of the center rod 21, and the top end of the sleeve 22 away from the abutting face 12 exceeds the top end of the center rod 21.

[0068] As can be seen from Figure 3 and Figure 5 , when the sleeve 22 arranged close to the top end of the valve stem 20 is pressed down by the human finger, the sleeve 22 causes the deformation groove 201 formed by the sleeve 22 to be axially compressed and drives the center rod 21 to move downward, and when the sleeve 22 arranged close to the bottom end of the valve stem 20 is pressed down by the human finger, Figure 5In the case shown, the sleeve 22 will stop moving downwardly against the abutting surface 12 at the bottom end of the valve cavity 11, and the sleeve 22 will move upwardly relative to the center rod 21, thereby axially compressing the deformation groove 201 formed by the sleeve 22, and at the same time, the deformation groove 201 formed by the sleeve 22 near the top end will also be axially compressed. Thus, the sealing ring 30 located in the two deformation grooves 201 will be axially extruded and deformed radially outwardly to form a stronger extrusion force against the inner wall of the valve cavity 11.

[0069] According to some optional embodiments, the sleeve 22 is tightly sleeved on the center rod 21 for friction braking by shaft hole fitting, so that the sleeve 22 can drive the center rod 21 to move in some cases, such as at least part of the period when the valve rod 20 returns to the first position from the second position.

[0070] In some embodiments, the valve rod 20 can be reset by providing a reset spring 25. As shown in Figure 3 , Figure 5 and Figure 11 , the reset spring 25 is sleeved on the valve rod 20, and the two ends of the reset spring 25 are connected to the valve housing 10 and the valve rod 20, respectively, which can be the cap 23 provided at the top end of the center rod 21 as shown in Figure 5 .

[0071] In other embodiments, the reset spring 25 can also be provided on the abutting surface 12 at the bottom end of the valve cavity 11 to reset the valve rod 20 by pushing the end of the center rod 21 at the top end.

[0072] According to some optional embodiments, the sleeve 22 and the sealing ring 30 are integrally provided, which can be connected by integrally injection molding or fusion connection or welding or gluing, etc. After the sealing ring 30 and the corresponding end of the sleeve 22 are integrally provided, the sealing ring 30 and the sleeve 22 can be installed on the center rod 21 in one step, and the assembly tightness requirement between the sealing ring 30 and the valve rod 20 of the suction valve 100 can be appropriately reduced, and the installation process of the sealing ring 30 and the sleeve 22 will be easy and fast.

[0073] According to some optional embodiments, as shown in Figure 3 and Figure 5 , the top end of the sleeve 22 provided on the top end side of the shaft ring 211 of the center rod 21 is provided with a cap 23, and the circumferential edge of the cap 23 is provided with a guide wall 231 extending towards the bottom end of the valve rod 20, which is inserted into the atmosphere port 15 provided in the valve housing 10 and forms a gap between the atmosphere port 15 to allow air to flow.

[0074] In some embodiments, the guide wall 231 is provided as a cylindrical member extending along the circumferential edge of the cap 23, and one end of the atmosphere port 15 is provided as an annular groove surrounding the valve rod 20 to accommodate the cylindrical guide wall 231.

[0075] Some optional embodiments, as shown in Figure 3 and Figure 5 , the middle section of the atmospheric port 15 is formed with an L-shaped turning section 151, when the valve stem 20 is in the first position relative to the valve cavity 11, the bottom end of the guide wall 231 of the cap 23 arranged at the top end of the sleeve 22 is away from the inner wall of the turning section 151. When the valve stem 20 is in the second position relative to the valve cavity 11, the bottom end of the guide wall 231 of the cap 23 arranged at the top end of the sleeve 22 abuts against the inner wall of the turning section 151 to shut off the atmospheric port 15 at the turning section 151.

[0076] Some embodiments, the top center of the center rod 21 is provided with a socket 213, the center of the cap 23 arranged at the top end of the sleeve 22 is provided with a post 232 extending axially into the socket 213 from the bottom end of the valve stem 20, the post 232 is tightly fitted with the socket 213.

[0077] Some embodiments, the bottom end of the post 232 and the bottom of the socket 213 have a first gap b, at the same time, the top end of the center rod 21 and the bottom of the cap 23 have a second gap c. When the valve stem 20 is in the first position relative to the valve cavity 11, the first gap b and the second gap c exist, when the valve stem 20 is in the second position relative to the valve cavity 11, the bottom end of the post 232 can abut against the bottom of the socket 213 to eliminate the first gap b, the top end of the center rod 21 abuts against the bottom of the cap 23 to eliminate the second gap c. During the process that the valve stem 20 moves from the second position to the first position relative to the valve cavity 11, because the recovery of the sealing ring 30 arranged in the deformation groove 201 formed by the sleeve 22 located at the top end side of the collar 211 will push the sleeve 22 upward, the first gap b and the second gap c will reappear. The above arrangement can make the sealing ring 30 have a greater degree of axial deformation when pressing the sleeve 22 located at the top end side of the collar 211, and thus obtain a greater degree of radial outward deformation.

[0078] According to some optional embodiments, as shown in Figure 3 , Figure 5 and Figure 6 , three sealing rings 30 are arranged, in order to install the three sealing rings 30, the valve stem 20 is provided with an installation groove 202 in addition to the two deformation grooves 201 arranged in sequence along the axial direction, the installation groove 202 is arranged on the outer peripheral wall of the sleeve 22 close to the abutment surface 12, i.e. the sleeve 22 located at the bottom end side of the collar 211, the sealing ring 30 in radial sealing contact with the inner peripheral wall of the valve cavity 11 is installed in the installation groove 202. The sealing ring 30 installed in the installation groove 202 and the two sealing rings 30 respectively installed in the two deformation grooves 201 are arranged in sequence along the axial direction of the valve stem 20, and the sealing ring 30 installed in the installation groove 202 is arranged closest to the abutment surface 12.

[0079] As shown in Figure 2and Figure 3 As shown, in the first position, the top of the valve stem 20 protrudes from the top of the valve housing 10. The inlet of the transition channel 214 provided inside the valve stem 20 connects to the vent 15 of the valve housing 10, and the outlet of the transition channel 214 connects to the discharge port 14 of the valve housing 10. The sealing ring 30 in the mounting groove 202 and the sealing ring 30 in an adjacent deformation groove 201 seal the periphery of the suction port 13 of the valve housing 10, and the sealing rings 30 in the two deformation grooves 201 seal the periphery of the vent 15. In the second position, as... Figure 4 and Figure 5 As shown, the top of the valve stem 20 moves downward to a position roughly the same as the top of the valve body 10. The inlet of the transition channel 214 provided inside the valve stem 20 is connected to the suction port 13, and the outlet of the transition channel 214 is connected to the discharge port 14. The sealing rings 30 in the two deformation grooves 201 seal the periphery of the suction port 13.

[0080] On the one hand, this application also provides an attraction component 800, such as Figure 2 and Figure 3 As shown, the suction assembly 800 includes a suction nozzle 200, a suction tube 300, and a suction valve 100 as described in any of the above embodiments. The distal end of the suction nozzle 200 is connected to the discharge port 14 provided within the suction valve 100, and the proximal end is used to connect to a negative pressure source. The proximal end of the suction tube 300 is connected to the suction port 13 provided within the suction valve 100, and the distal end is used to connect to a three-way tube 400 with an instrument nozzle.

[0081] On the one hand, this application also provides an endoscope 1000, such as Figure 1 and Figure 2 As shown, the endoscope 1000 includes a handle housing 900, a suction assembly 800 mounted on the handle housing 900, a traction wheel 500, and an insertion portion 600. The proximal end of an instrument tube (not shown) within the insertion portion 600 is connected to the distal end of a three-way connector 400, and the proximal end of the three-way connector 400 is connected to the distal end of the suction tube 300. Figure 3 As shown, the traction wheel 500 is located at the distal end of the attraction assembly 800 and is used to connect the traction rope to control the bending of the insertion part 600.

[0082] According to some optional embodiments, such as Figure 2 - Figure 5 As shown, the valve housing 10 of the suction assembly 800 includes a core housing 101 and a sleeve housing 102 sleeved outside the core housing 101.

[0083] The core housing 101 is provided with a valve chamber 11, an abutment surface 12, an intake port 13, and an exhaust port 14, such as Figure 12 As shown, the core shell 101 also includes a portion of an atmospheric vent 15. (As shown...) Figure 3As shown, another part of the atmosphere port 15 is arranged in the sleeve 102, and is used to accommodate the guide wall 231 arranged on the cap 23 arranged at the top end of the sleeve 22. Figure 13 As shown, the outer circumferential surface of the sleeve 102 is further provided with a ring groove 16, and the top end groove wall of the ring groove 16 is a radially protruding flange part 17. As shown, Figure 3 As shown, when the suction valve 100 is installed on the handle shell 900, the ring groove 16 of the sleeve 102 is clamped and arranged in the clamping groove of the handle shell 900 in a radial direction, the top end of the sleeve 102 protrudes out of the handle shell 900, and the top side groove wall of the ring groove 16 of the sleeve 102, i.e., the flange part 17, forms an axial installation gap a with the outer wall of the handle shell 900. When the valve rod 20 does not need to be pressed, a person's finger is generally placed on the surface of the handle shell 900, and since the flange part 17 of the sleeve 102 has the installation gap a from the outer wall of the handle shell 900, the finger can be fixed by the ring groove 16, and the position of the finger is limited by the groove bottom of the ring groove 16 and the flange part 17, so as to prevent the finger from moving upward and touching the cap 23 of the valve rod 20. Therefore, the sleeve 102 with such a structure can well block the finger from touching the cap 23 arranged on the valve rod 20, and prevent the finger from being pressed to the cap 23 when the finger moves along the surface of the handle shell 900, so as to avoid accidentally adjusting the suction state of the suction valve 100.

[0084] The endoscope involved in the embodiments of the present application can be a bronchoscope, a renal pelviscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral cavity scope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiments of the present application do not specifically limit the type of endoscope.

[0085] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles, or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles, or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, article, or device that includes the element.

[0086] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in a reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0087] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A suction valve comprising a valve housing (10), a valve stem (20) and a sealing ring (30) installed in a valve cavity (11) of the valve housing (10), the valve stem (20) being capable of being repeatedly switched between a first position and a second position in the axial direction relative to the valve cavity (11) to switch a suction state, characterized in that: an abutting surface (12) is arranged at the bottom end of the valve cavity (11) in the axial direction; an outer peripheral wall of the valve stem (20) is provided with a deformation groove (201) capable of being compressed in the axial direction to reduce the groove width, the sealing ring (30) being installed in the deformation groove (201) to axially support the deformation groove (201) to maintain the groove width, the sealing ring (30) being in radial sealing contact with the inner peripheral wall of the valve cavity (11), the valve stem (20) being capable of axially compressing the deformation groove (201) to axially compress the sealing ring (30) therein to make the sealing ring (30) elastically deformed radially outward to press contact the inner peripheral wall of the valve cavity (11) when the valve stem (20) is axially extruded; in the first position, the bottom end of the valve stem (20) is separated from the abutting surface (12) to be in a pause state; in the second position, the bottom end of the valve stem (20) axially extrudes the abutting surface (12) to axially compress the deformation groove (201) to be in a suction state; the valve stem (20) is arranged as a rod member capable of being axially compressed, and in the second position, the valve stem (20) is axially compressed to cause the deformation groove (201) to be axially compressed; the valve stem (20) comprises a center stem (21) provided with a collar (211) at the middle section, a sleeve (22) being axially movably sleeved on the center stem (21) and arranged at one end side or both end sides of the collar (211) on the center stem (21); an end of the sleeve (22) facing the collar (211) and the collar (211) form the deformation groove (201) therebetween; an end face of the collar (211) is provided with a circumferentially extending clamping groove (212), an axially extending annular skirt (31) arranged at an end of the sealing ring (30) is clamped into the clamping groove (212) to maintain the shape and prevent the sealing ring (30) from being separated; and / or, an end of the sleeve (22) away from the collar (211) exceeds the end of the center stem (21); and / or, an inner peripheral surface of the sealing ring (30) is in sealing contact with the peripheral wall of the center stem (21); and / or, the sealing ring (30) is integrally arranged on the sleeve (22); and / or, the sleeve (22) is tightly sleeved on the center stem (21) to be braked by the friction force of the shaft hole cooperation; and / or, both ends of the sealing ring (30) are respectively in sealing contact with the corresponding side walls of the deformation groove (201); the sleeve (22) comprises the sleeve (22) arranged on the center stem (21) at the top end side of the collar (211), a top end of the sleeve (22) is located outside the valve cavity (11) and is provided with a cap (23) for being pressed by a hand, and a pressing surface of the cap (23) has a diameter greater than that of the valve stem (20). ​ ​ ​ ​ 2. A suction valve according to claim 1, characterized in that: ​ 3. A suction valve according to claim 2, wherein: ​ 4. A suction valve according to claim 3, wherein: ​ ​ ​ ​ ​ ​ 5. A suction valve according to claim 3, wherein: ​ 6. A suction valve according to claim 5, wherein: The cap (23) is provided with a guide wall (231) extending towards the bottom end of the valve rod (20), which is inserted into the air port (15) provided in the valve housing (10) and forms a gap allowing air to flow between the guide wall (231) and the air port (15); The middle section of the air port (15) is formed with a turning section (151); In the first position, the bottom end of the guide wall (231) is away from the turning section (151); In the second position, the bottom end of the guide wall (231) abuts the inner wall of the turning section (151) to shut off the air port (15) at the turning section (151); And / or, the center of the cap (23) is provided with a column (232) extending axially towards the bottom end of the valve rod (20), which is tightly fitted in the insertion hole (213) provided at the top center of the center rod (21).

7. The suction valve according to claim 1, wherein: The valve rod (20) includes two deformation grooves (201) and an installation groove (202) arranged in sequence along the axial direction, and the installation groove (202) is provided with a sealing ring (30) in radial sealing contact with the inner circumferential wall of the valve cavity (11); In the first position, the inlet of the adapter flow channel (214) provided in the valve rod (20) is communicated with the air port (15) of the valve housing (10), the outlet of the adapter flow channel (214) is communicated with the exhaust port (14) of the valve housing (10), and the sealing ring (30) in the installation groove (202) and the sealing ring (30) in the adjacent deformation groove (201) seal the suction port (13) of the valve housing (10) on the side; In the second position, the inlet of the adapter flow channel (214) is communicated with the suction port (13), the outlet of the adapter flow channel (214) is communicated with the exhaust port (14), and the sealing rings (30) in the two deformation grooves (201) seal the suction port (13) on the side.

8. An attraction assembly characterized by: The suction valve (100) according to any one of claims 1-7, the suction valve (100) is connected to the exhaust port (14) provided in the suction valve (100) at one end of the suction nozzle (200), and one end of the suction pipe (300) is connected to the suction port (13) provided in the suction valve (100).

9. An endoscope characterized by: The suction assembly (800) according to claim 8, wherein the valve housing (10) of the suction assembly (800) comprises a core shell (101) and a sleeve shell (102) sleeved outside the core shell (101), the top end of the sleeve shell (102) protrudes out of the handle shell (900) and forms an axial installation gap (A) with the outer wall of the handle shell (900), so as to prevent the valve rod (20) from being touched by fingers.

10. An endoscope according to claim 9, characterized in that: The valve rod (20) includes two deformation grooves (201) and an installation groove (202) arranged in sequence along the axial direction, and the installation groove (202) is provided with a sealing ring (30) in radial sealing contact with the inner circumferential wall of the valve cavity (11); In the first position, the inlet of the adapter flow channel (214) provided in the valve rod (20) is communicated with the air port (15) of the valve housing (10), the outlet of the adapter flow channel (214) is communicated with the exhaust port (14) of the valve housing (10), and the sealing ring (30) in the installation groove (202) and the sealing ring (30) in the adjacent deformation groove (201) seal the suction port (13) of the valve housing (10) on the side; In the second position, the inlet of the adapter flow channel (214) is communicated with the suction port (13), the outlet of the adapter flow channel (214) is communicated with the exhaust port (14), and the sealing rings (30) in the two deformation grooves (201) seal the suction port (13) on the side. The suction valve (100) according to any one of claims 1-7, the suction valve (100) is connected to the exhaust port (14) provided in the suction valve (100) at one end of the suction nozzle (200), and one end of the suction pipe (300) is connected to the suction port (13) provided in the suction valve (100). The suction assembly (800) according to claim 8, wherein the valve housing (10) of the suction assembly (800) comprises a core shell (101) and a sleeve shell (102) sleeved outside the core shell (101), the top end of the sleeve shell (102) protrudes out of the handle shell (900) and forms an axial installation gap (A) with the outer wall of the handle shell (900), so as to prevent the valve rod (20) from being touched by fingers.

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