Suction valve, endoscope unblocking structure, endoscope handle and endoscope

Abstract

The present invention provides a suction valve, an endoscope unblocking structure, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The suction valve includes a valve body and a valve stem, a valve cavity is arranged in the valve body, the valve cavity includes a sealing cavity and a suction cavity connected to each other, the valve body has a negative pressure channel and an atmospheric channel connected to the valve cavity, the valve stem has a blocking end, and the blocking end is movably arranged in the valve cavity; when the blocking end moves in the sealing cavity, the circumferential side wall of the blocking end contacts and cooperates with the circumferential side wall of the sealing cavity, and the blocking end is in a closed position; when the blocking end moves in the suction cavity, there is a gap between the circumferential side wall of the blocking end and the circumferential side wall of the sealing cavity, and the blocking end is in a suction position. The present application sets a sealing cavity with a certain axial length. When the suction valve is installed in the instrument channel and the instrument channel is sealed, the internal pressure of the instrument channel is adjusted by controlling the position of the blocking end in the sealing cavity, so as to push the stones blocking the instrument channel to move and open the instrument channel.

Description

Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and in particular relates to a suction valve, an endoscope unblocking structure, an endoscope handle and an endoscope. Background Art

[0002] In the treatment of urinary stone diseases, in the prior art, ureteroscope is generally used to treat kidney stones. Specifically, the ureteroscope is inserted into the kidney, and then the stones in the renal pelvis are broken up by laser, and then the broken stones are discharged out of the body through the instrument channel through the effect of irrigation and negative pressure suction.

[0003] However, in the actual operation process, it is easy for stones to block the instrument channel, making it difficult for the stones to be expelled from the body, and increasing the difficulty of the doctor's intraoperative operation. Summary of the invention

[0004] The purpose of the present application is to provide a suction valve, an endoscope unblocking structure, an endoscope handle and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application provides a suction valve, including a valve body and a valve stem, a valve cavity is arranged in the valve body, the valve cavity includes a sealing cavity and a suction cavity arranged in connection with each other, the valve body also has a negative pressure channel and an atmospheric channel connected to the valve cavity, the valve stem has a blocking end, and the blocking end is movably arranged in the valve cavity; when the blocking end moves in the sealing cavity, the circumferential side wall of the blocking end contacts and cooperates with the circumferential side wall of the sealing cavity, and the blocking end is in a closed position; when the blocking end moves in the suction cavity, there is a gap between the circumferential side wall of the blocking end and the circumferential side wall of the sealing cavity, and the blocking end is in a suction position.

[0007] In the second aspect, an embodiment of the present application provides an endoscope unblocking structure, including the suction valve provided in the embodiment of the first aspect, and also including an instrument channel, the instrument channel being provided with a distal port, an instrument port and a proximal port in sequence axially from its distal end; the instrument port has a conducting state and a closed state, and when the instrument port is in the conducting state, the instrument port is used to receive substances injected into the instrument channel; the suction valve is installed at the proximal port, and the suction chamber is connected to the instrument channel.

[0008] In a third aspect, an embodiment of the present application provides an endoscope handle, comprising an endoscope unblocking structure provided in an embodiment of the second aspect.

[0009] In a fourth aspect, an embodiment of the present application provides an endoscope, including the endoscope handle provided in the embodiment of the third aspect.

[0010] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0011] In the present application, the valve chamber of the suction valve includes a sealing chamber and a suction chamber that are connected to each other. The sealing end of the valve stem moves between the sealing chamber and the suction chamber to realize the switching of the sealing end between the closed position and the suction position. When the sealing end moves in the sealing chamber, the sealing end is in the closed position. Since the sealing chamber has a certain axial length, when the suction valve is installed in the instrument channel and the instrument channel is in a sealed state, the space size of the sealing chamber connected to the instrument channel can be adjusted by controlling the position of the sealing end in the sealing chamber, thereby controlling the size of the internal pressure of the instrument channel. By increasing the pressure of the instrument channel, the stones blocking the instrument channel are pushed to move, so that the instrument channel is conductive. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 is a schematic diagram of the coordination between the suction valve and the instrument channel provided in some embodiments of the present application;

[0014] Figure 2 This is a cross-sectional view of the coordination of the suction valve and the instrument channel provided in some embodiments of the present application Figure 1 ;

[0015] Figure 3 This application is about Figure 2 Detailed view of point A;

[0016] Figure 4 is a schematic diagram of the structure of a sealing ring provided in some embodiments of the present application;

[0017] Figure 5 This is a cross-sectional view of the coordination of the suction valve and the instrument channel provided in some embodiments of the present application Figure 2 ;

[0018] Figure 6 This is a cross-sectional view of the coordination of the suction valve and the instrument channel provided in some embodiments of the present application Figure 3 ;

[0019] Figure 7 This application is about Figure 6 Detail of point B;

[0020] Figure 8 is a schematic diagram of the cooperation between the valve stem and the sealing body provided in some embodiments of the present application;

[0021] Fig. 9 This application is about Figure 8 Detailed view of point C;

[0022] Fig.10 It is a schematic diagram of the overall structure of the de-blocking structure provided in some embodiments of the present application;

[0023] Fig.11 is a cross-sectional view of a de-blocking structure provided in some embodiments of the present application;

[0024] Fig.12 This application is about Fig.11 Detail of point D.

[0025] In the figure: 10-endoscope handle, 100-instrument channel, 200-suction valve, 210-valve body, 211-valve chamber, 211a-sealing chamber, 211a1-gradually expanding section, 211a2-gradually contracting section, 211b-suction chamber, 212-negative pressure channel, 213-atmospheric channel, 214-step portion, 215-valve cap, 220-valve stem, 221-blocking end, 230-sealing ring, 231-installing portion, 240-sealing body, 241-limiting surface, 242-installing groove, 300-connecting valve, 400-syringe. DETAILED DESCRIPTION

[0026] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0027] It should be noted that, in each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0028] The present application embodiment provides a suction valve 200, referring to Figures 1 to 8 As shown, it includes a valve body 210 and a valve stem 220. A valve cavity 211 is provided in the valve body 210, and the valve stem 220 is movably provided inside the valve cavity 211. By moving the valve stem 220, the position of the valve stem 220 in the valve cavity 211 is changed, so that the suction valve 200 is turned on or off.

[0029] The valve cavity 211 includes a sealing cavity 211a and a suction cavity 211b which are connected to each other. The valve body 210 also has a negative pressure channel 212 and an atmospheric channel 213 which are connected to the valve cavity 211. The negative pressure channel 212 is used to connect a negative pressure suction device, and the negative pressure suction device can suction the valve cavity 211 through the negative pressure channel 212. The atmospheric channel 213 is used to connect the external environment where the suction valve 200 is located. Through the atmospheric channel 213, the valve cavity 211 can be connected to the external environment. When the suction valve 200 is in use, it is directly installed on the channel that needs to be suctioned, such as the instrument channel 100 of the endoscope. The negative pressure suction device can suck out the material in the instrument channel 100 through the negative pressure channel 212.

[0030] The valve stem 220 has a blocking end 221, and the blocking end 221 is movably disposed in the valve cavity 211. The blocking end 221 can move inside the valve cavity 211 to change the position of the blocking end 221. The sealing cavity 211a and the suction cavity 211b are part of the valve cavity 211, and the blocking end 221 can also move in the sealing cavity 211a and the suction cavity 211b.

[0031] When the blocking end 221 moves in the sealed cavity 211a, the circumferential side wall of the blocking end 221 contacts and cooperates with the circumferential side wall of the sealed cavity 211a, and the blocking end 221 directly blocks the sealed cavity 211a, cutting off the communication relationship between the partial cavities on both sides of the blocking end 221, and the blocking end 221 is in a closed position. At this time, the negative pressure channel 212 is connected to the atmospheric channel 213, and the negative pressure suction device connected to the negative pressure channel 212 directly sucks the external environment, and because the blocking end 221 seals the sealed cavity 211a, the negative pressure suction device connected to the negative pressure channel 212 cannot suck the channel connected to the suction valve 200.

[0032] When the blocking end 221 moves in the suction chamber 211b, there is a gap between the circumferential side wall of the blocking end 221 and the circumferential side wall of the suction chamber 211b, and the blocking end 221 cannot seal the suction chamber 211b, and the blocking end 221 is in the suction position. At this time, due to the change in the position of the valve stem 220, the atmospheric channel 213 is closed, the valve chamber 211 is not connected to the external environment, the negative pressure channel 212 is connected to the sealing chamber 211a and the suction chamber 211b, and the negative pressure suction device connected to the negative pressure channel 212 can suction the channel connected to the suction valve 200.

[0033] The sealing chamber 211a is connected to the suction chamber 211b, and when the blocking end 221 of the valve stem 220 moves between the sealing chamber 211a and the suction chamber 211b, the blocking end 221 also switches between the suction position and the closed position. In the specific use of the suction valve 200, when it is necessary to suction the channel connected to the suction valve 200, the valve stem 220 is moved, and the blocking end 221 of the valve stem 220 is moved to the suction chamber 211b, so that the blocking end 221 is in the suction position. When it is not necessary to suction the channel connected to the suction valve 200, the valve stem 220 is moved, and the blocking end 221 of the valve stem 220 is moved to the sealing chamber 211a, so that the blocking end 221 is in the closed position, and the negative pressure channel 212 is connected to the atmospheric channel 213, and is separated from the channel connected to the suction valve 200.

[0034] The sealing cavity 211a has a certain axial length, and the blocking end 221 is always in a closed position when the blocking end 221 moves in the sealing cavity 211a. In the relevant surgical operation of the endoscope, the suction valve 200 is installed at the proximal opening of the instrument channel 100, and the valve cavity 211 is connected to the instrument channel 100.

[0035] If the instrument channel 100 is blocked by stones or other substances, when the blocking end 221 is in the closed position, the inside of the instrument channel 100 is sealed, and the external atmosphere is not connected to the inside of the instrument channel 100. At this time, the position of the blocking end 221 is moved in the sealing cavity 211a, and as the position of the blocking end 221 changes, the size of the space of the sealing cavity 211a connected to the suction channel changes, thereby adjusting the size of the overall space formed by the connection between the valve cavity 211 and the instrument channel 100. In the case where the space is filled with an incompressible medium such as liquid, the size of the space changes, and the pressure inside the space also changes. By reducing the size of the sealing cavity 211a, the internal pressure of the instrument channel 100 is increased, so that the pressure on both sides of the stones or other blockages in the instrument channel 100 is different, forming a pressure difference, and the pressure difference drives the stones or other blockages to move, thereby opening the instrument channel 100.

[0036] By controlling the valve stem 220 to move in the valve cavity 211, the pressure inside the instrument channel 100 can be adjusted, the instrument channel 100 can be opened, and stones and other substances can be smoothly discharged out of the body, thereby reducing the difficulty of the doctor's intraoperative operation and improving the intraoperative operation speed.

[0037] It can be understood that when the blocking end 221 is in the closed position, the blocking end 221 can also be partially in the sealing cavity 211a and partially in the suction cavity 211b. The circumferential side wall of the partial blocking end 221 in the sealing cavity 211a contacts the circumferential side wall of the sealing cavity 211a, which can block the connection of the cavities on both sides of the blocking end 221. Even if there is a gap between the circumferential side wall of the partial blocking end 221 in the suction cavity 211b and the circumferential side wall of the suction cavity 211b, the blocking end 221 will not be in the suction position. Only when the blocking end 221 is completely located in the suction cavity 211b, the gap between the blocking end 221 and the inner wall of the suction cavity 211b can communicate with the valve cavity 211 on both sides of the blocking end 221, so that the blocking end 221 is in the suction position.

[0038] Compared with the existing suction valve 200, in the suction valve 200 provided in the embodiment of the present application, the sealing cavity 211a has a certain axial length, and the blocking end 221 can have a certain movement stroke in the sealing cavity 211a. To switch the state of the suction valve 200, the blocking end 221 must meet a certain movement distance to complete the switch, and during the movement of the blocking end 221, the space size of the sealing cavity 211a connected to the instrument channel 100 can be adjusted, and the pressure in the instrument channel 100 can be adjusted.

[0039] In some embodiments of the present application, when the suction valve 200 is installed in the instrument channel 100, the suction chamber 211b is arranged close to the instrument channel 100 relative to the sealing chamber 211a. When part of the blocking end 221 is located in the suction chamber 211b, during the movement of the blocking end 221, the size of the suction chamber 211b connected to the instrument channel 100 is adjusted. In other embodiments of the present application, when the suction valve 200 is installed in the instrument channel 100, the suction chamber 211b is arranged away from the instrument channel 100 relative to the sealing chamber 211a. When part of the blocking end 221 is located in the suction chamber 211b, during the movement of the blocking end 221, the size of the sealing chamber 211a connected to the instrument channel 100 is adjusted.

[0040] The axial distance of the sealing cavity 211a is limited, and by adjusting the position of the blocking end 221 in the sealing cavity 211a, the adjustment range of the internal pressure of the instrument channel 100 is limited. By controlling the axial distance of the sealing cavity 211a, the maximum pressure inside the instrument channel 100 is controlled to prevent the pressure inside the instrument channel 100 from being higher than the maximum pressure that its tube wall can withstand, and to prevent the situation where the pressure inside the instrument channel 100 is too high and causes damage to its structure.

[0041] In some embodiments of the present application, the valve cavity 211 further includes a limiting surface 241. Figure 3 , Figure 7 and Fig. 9 As shown, the limiting surface 241 is located on the side of the sealing chamber 211a away from the suction chamber 211b, and the valve stem 220 cooperates with the limiting surface 241 along its moving direction to prevent the blocking end 221 from escaping from the sealing chamber 211a from the side of the sealing chamber 211a away from the suction chamber 211b. The blocking end 221 is movably arranged inside the valve chamber 211. When the blocking end 221 is located in the sealing chamber 211a, the blocking end 221 is moved toward the suction chamber 211b, and the blocking end 221 can be escaping from the sealing chamber 211a and enter the suction chamber 211b, and the blocking end 221 is switched from the closed position to the suction position. When the blocking end 221 is moved toward the side away from the suction chamber 211b, the valve stem 220 cooperates with the limiting surface 241 to prevent the valve stem 220 from being moved further, and the blocking end 221 cannot be escaping from the sealing chamber 211a.

[0042] By setting the limiting surface 241 to cooperate with the valve stem 220, the moving direction of the valve stem 220 is limited, so that the valve stem 220 can only leave the sealing cavity 211a when moving toward the suction cavity 211b, which makes it easier for the operator to adjust the position of the blocking end 221 and avoids the situation in which the blocking end 221 accidentally leaves the sealing cavity 211a in the direction away from the suction cavity 211b during the process of adjusting the position of the blocking end 221 in the sealing cavity 211a to adjust the internal pressure of the instrument channel 100, resulting in the failure of the suction valve 200 to adjust the internal pressure of the instrument channel 100.

[0043] In some specific embodiments of the present application, a sealing ring 230 is installed in the valve cavity 211. Figures 1 to 3 , Figures 5 to 7 As shown, the outer peripheral wall of the sealing ring 230 contacts and cooperates with the inner wall of the valve cavity 211, and the sealing ring 230 encloses and forms a sealing cavity 211a. The sealing ring 230 is directly installed in the valve body 210, so that the sealing cavity 211a and the suction cavity 211b connected to the sealing cavity 211a and having a size difference can be defined. Due to the thickness limitation of the sealing ring 230, the size of the valve cavity 211 on both sides of the sealing ring 230 is greater than the inner diameter of the sealing ring 230, and the valve cavity 211 on both sides of the sealing ring 230 can be set as the suction cavity 211b.

[0044] Furthermore, a sealing ring 230 of corresponding size can be directly set according to the existing suction valve 200 structure and the size of the sealing end 221 of the existing valve stem 220, and the sealing ring 230 can be directly assembled into the existing valve body 210 to complete the production of the suction valve 200 provided in the embodiment of the present application.

[0045] In some preferred embodiments of the present application, the sealing cavity 211a has a gradually expanding section 211a1 disposed close to the suction cavity 211b. Figures 5 to 7As shown, along the direction from the sealing cavity 211a to the suction cavity 211b, the diameter of the gradually expanding section 211a1 gradually increases. The opening of the sealing cavity 211a close to the suction cavity 211b forms a trumpet-shaped opening. When the blocking end 221 in the suction cavity 211b is moved toward the sealing cavity 211a, due to the trumpet-shaped opening of the sealing cavity 211a, the blocking end 221 is more likely to enter the sealing cavity 211a from the suction cavity 211b, and the movement of the valve stem 220 is smoother.

[0046] The plugging end 221 and the sealing cavity 211a are sealed and matched, and the radial dimensions of the two are equal, and even the radial dimension of the plugging end 221 is larger than the inner diameter of the sealing cavity 211a. Under such a setting, the plugging end 221 has a better sealing effect on the sealing cavity 211a. After the plugging end 221 leaves the sealing cavity 211a, it wants to re-enter the sealing cavity 211a. Due to the size limitation of the plugging end 221, the plugging end 221 is easy to collide with the step position formed between the sealing cavity 211a and the suction cavity 211b during the process of entering the sealing cavity 211a, causing the movement of the valve stem 220 to be stuck. Therefore, the present application sets up a gradually expanding section 211a1, and the opening of the gradually expanding section 211a1 is wider, so that the blocking end 221 can enter the gradually expanding section 211a1 more easily, and then the inner wall of the gradually expanding section 211a1 guides the blocking end 221, so that the circumferential side wall of the blocking end 221 can smoothly contact the circumferential side wall of the valve cavity 211.

[0047] The valve chamber 211 has a connection port, and the connection port is used to connect to the instrument channel 100. When the suction valve 200 is installed on the instrument channel 100, the instrument channel 100 is connected to the connection port of the valve chamber 211. Further preferably, the suction chamber 211b is arranged close to the connection port relative to the sealing chamber 211a, and the sealing chamber 211a also includes a tapered section 211a2 connected to the gradually expanding section 211a1. Figure 6 and Figure 7 As shown, the tapered section 211a2 is located on the side of the gradually expanding section 211a1 away from the suction chamber 211b, and the diameter of the tapered section 211a2 gradually decreases along the direction from the sealing chamber 211a to the suction chamber 211b.

[0048] In the process of the blocking end 221 of the valve stem 220 moving toward the suction chamber 211b in the tapered section 211a2, the size of the blocking end 221 remains unchanged, but the diameter of the tapered section 211a2 gradually changes. Therefore, in the process of the blocking end 221 moving toward the suction chamber 211b, the blocking end 221 is gradually compressed by the wall surface corresponding to the tapered section 211a2, and the movement resistance of the blocking end 221 increases. The operator can feel the change in the operation feel, which is convenient for the operator to judge the position of the blocking end 221 in the valve chamber 211. In addition, when it is not necessary to move the blocking end 221 to the suction chamber 211b, the operator can timely judge the position of the blocking end 221 and move the blocking end 221 back. At the same time, due to the increase in movement resistance, a certain amount of force is required to move the blocking end 221 to the suction chamber 211b, which can avoid the valve stem 220 from being accidentally moved to the suction chamber 211b to a certain extent.

[0049] In addition, due to the change in the size of the tapered section 211a2, when the blocking end 221 moves toward the suction chamber 211b, when the suction valve 200 is connected to the blocked instrument channel 100, the speed at which the size of the space formed by the communication between the instrument channel 100 and the valve chamber 211 is reduced is slowed down, and the speed at which the pressure inside the instrument channel 100 increases is also slowed down. When the blocking end 221 is in the closed position, the closer it is to the suction chamber 211b, the greater the pressure inside the instrument channel 100. When the blocking end 221 is close to the suction chamber 211b, the speed at which the pressure inside the instrument channel 100 increases is slowed down, making it easier for the operator to control the pressure inside the instrument channel 100 and avoiding the adverse effects caused by a sudden increase in pressure.

[0050] Further preferably, the inner wall surface of the tapered section 211a2 and the inner wall surface of the gradually expanding section 211a1 transition smoothly, thereby reducing the jamming of the valve stem 220 during the movement of the valve cavity 211 and improving the smoothness of the operation of the valve stem 220 .

[0051] In some specific embodiments, a sealing body 240 is further disposed in the valve body 210. Figures 1 to 9 As shown, the sealing body 240 is an annular structure, and the limiting surface 241 is located on the sealing body 240. The sealing body 240 is connected to the sealing ring 230, and the sealing ring 230 is provided with a mounting portion 231 at one end close to the sealing body 240. Figure 4 The inner wall of the valve cavity 211 is provided with a step portion 214, referring to Figure 3 and Figure 7 As shown, the mounting portion 231 is sandwiched between the end surface of the sealing body 240 and the step portion 214 .

[0052] The sealing cavity 211a formed by the sealing ring 230 is in contact with the blocking end 221. During the movement of the blocking end 221, the blocking end 221 and the sealing ring 230 are in close contact, and the friction between the two is strong. The mounting portion 231 of the sealing ring 230 is clamped between the sealing body 240 and the step portion 214, and the two moving directions of the sealing ring 230 are restricted, thereby stabilizing the position of the sealing ring 230, and preventing the blocking end 221 from moving in the sealing cavity 211a, driving the sealing ring 230 to move, resulting in a failure to conduct the instrument channel 100.

[0053] The step portion 214 of the valve cavity 211 is formed due to the change in the size of the interior of the valve cavity 211. When the size of the valve cavity 211 increases, the step portion 214 will appear at the location where the size change occurs.

[0054] refer to Fig. 9 As shown, the end surface of the sealing body 240 close to the step portion 214 is provided with a mounting groove 242, and the mounting portion 231 of the sealing ring 230 is installed in the mounting groove 242. The sealing ring 230 is an annular structure, which is installed in the valve cavity 211. The outer peripheral wall of the sealing ring 230 contacts and cooperates with the inner wall of the valve cavity 211. The inner wall of the valve cavity 211 can limit the sealing ring 230 and determine the installation position of the sealing ring 230. At the same time, the mounting portion 231 also needs to be installed in the mounting groove 242, and the cooperation between the mounting portion 231 and the mounting groove 242 can also locate the installation position of the sealing ring 230. The two positioning methods cooperate with each other to improve the accuracy of the installation position of the sealing ring 230, thereby facilitating the subsequent movement of the valve stem 220 and the cooperation effect between the blocking end 221 and the sealing cavity 211a.

[0055] In some embodiments of the present application, the valve stem 220 is connected to an elastic structure. After the valve stem 220 is pressed and moved, the operator releases the pressure on the valve stem 220, and the valve stem 220 is reset under the drive of the elastic structure.

[0056] refer to Figure 1 and Figure 2 As shown, the valve body 210 includes a valve cap 215, which has a certain elasticity. The valve cap 215 is fixed to the valve stem 220, and the atmosphere channel 213 is located on the valve cap 215. The atmosphere channel 213 is located on the side of the suction chamber 211b and the sealing chamber 211a close to the atmosphere channel 213. By pressing the valve stem 220, the valve cap 215 is compressed in the process of the valve stem 220 moving and the blocking end 221 switching from the closed position to the suction position. At the same time, the atmosphere channel 213 located on the valve cap 215 is also compressed, so that the atmosphere channel 213 is closed. After the restriction on the valve stem 220 is released, the valve stem 220 is reset under the drive of the elastic member, and the atmosphere channel 213 is connected to the atmosphere channel 213 again, and the blocking end 221 switches from the suction position to the closed position.

[0057] The present application also provides an endoscope unblocking structure, referring to Figures 10 to 12 As shown, it includes the suction valve 200 provided by any of the above embodiments, and also includes an instrument channel 100. The instrument channel 100 is used for the entry of instruments or fluids. The instrument channel 100 is a component of an endoscope. The instrument channel 100 is provided with a distal port, an instrument port and a proximal port in sequence along its axial direction from its distal end. The instrument port has a conducting state and a closed state. When the instrument port is in the conducting state, the instrument port is used to receive a substance injected into the instrument channel 100, and the substance is generally a liquid medium, such as saline. The suction valve 200 is installed at the inlet port, and the suction chamber 211b is connected to the instrument channel 100.

[0058] When the instrument channel 100 is blocked by stones or other substances, and the blocking position is located between the distal end and the instrument port of the instrument channel 100, physiological saline can be injected into the instrument channel 100 through the instrument port, and the blocking end 221 is controlled to be in a closed position. After the injection of physiological saline, the instrument port is closed, so that the part of the instrument channel 100 between the stone and the suction valve 200 forms a sealed space, and the space is also filled with a medium. By pushing the valve stem 220 to move, the pressure in the instrument channel 100 is adjusted, so that the pressure on both sides of the stone is unequal, forming a pressure difference, and the stone is pushed under the action of the pressure difference, thereby conducting the instrument channel 100. Other substances can be blood clots, foreign matter, sputum, etc.

[0059] The amount of material that can be filled inside the instrument channel 100 is controllable. When the instrument channel 100 is open, no new material is injected, and no further kinetic energy is given to the stones. After the stones move under the drive of the pressure difference, their subsequent movement speed will gradually weaken, which can avoid damage to the human body caused by stones or other blockages, and has high safety performance.

[0060] During the process of adjusting the internal pressure of the instrument channel 100, the valve stem 220 can be moved back and forth so that the pressure in the instrument channel 100 changes intermittently, making it easier to push the stone to move.

[0061] The liquid medium can be injected into the instrument channel 100 through the instrument port by using a syringe 400. Fig.10 and Fig.11 After the injection is completed, the device port can be directly blocked with the syringe 400. In other embodiments, refer to Fig.10 and Fig.11 As shown, a connecting valve 300 may be installed at the instrument port, and the connecting valve 300 is used to control the blocking and conduction of the instrument port.

[0062] In some embodiments of the present application, the pressure inside the instrument channel 100 is adjusted by controlling the size of the sealed cavity 211a connected to the instrument channel 100. The larger the inner diameter of the sealed cavity 211a is, the smaller the inner diameter of the instrument channel 100 is, and the more obvious the pressure regulation effect on the instrument channel 100 is. However, due to the size limitations of various components of the endoscope, the inner diameter of the instrument channel 100 can be less than half of the inner diameter of the sealed cavity 211a.

[0063] The embodiment of the present application further provides an endoscope handle 10, comprising the endoscope unblocking structure provided by any of the above embodiments. Part of the instrument channel 100 is installed in the endoscope handle 10, and the suction valve 200 is installed at a corresponding position of the endoscope handle 10.

[0064] An embodiment of the present application also provides an endoscope, comprising the endoscope handle 10 provided in any of the above embodiments.

[0065] The endoscope provided in the embodiments of the present application may be a nephroscope, or a suction endoscope, a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A suction valve, characterized in that: The valve body (210) comprises a valve body (210) and a valve stem (220); a valve cavity (211) is arranged in the valve body (210); the valve cavity (211) comprises a sealing cavity (211a) and a suction cavity (211b) arranged in connection with each other; the valve body (210) further comprises a negative pressure channel (212) and an atmospheric channel (213) communicating with the valve cavity (211); the valve stem (220) comprises a blocking end (221); the blocking end (221) is movably arranged in the valve cavity (211); When the blocking end (221) moves in the sealing cavity (211a), the circumferential side wall of the blocking end (221) contacts and cooperates with the circumferential side wall of the sealing cavity (211a), the blocking end (221) is in a closed position, and the blocking end (221) has a moving stroke in the sealing cavity (211a); when the blocking end (221) moves in the suction cavity (211b), there is a gap between the circumferential side wall of the blocking end (221) and the circumferential side wall of the suction cavity (211b), and the blocking end (221) is in a suction position; The sealed cavity (211a) has a gradually expanding section (211a1) arranged close to the suction cavity (211b), and the diameter of the gradually expanding section (211a1) gradually increases along the direction from the sealed cavity (211a) to the suction cavity (211b); The valve chamber (211) further comprises a connection port, which is used to connect to the instrument channel (100); the suction chamber (211b) is arranged close to the connection port relative to the sealing chamber (211a); the sealing chamber (211a) further comprises a tapered section (211a2) connected to the gradually expanding section (211a1); the tapered section (211a2) is located on a side of the gradually expanding section (211a1) away from the suction chamber (211b); and the diameter of the tapered section (211a2) gradually decreases along the direction from the sealing chamber (211a) to the suction chamber (211b).

2. A suction valve according to claim 1, characterized in that: The valve cavity (211) further comprises a limiting surface (241), wherein the limiting surface (241) is located on a side of the sealing cavity (211a) away from the suction cavity (211b), and the valve stem (220) cooperates with the limiting surface (241) along its moving direction to prevent the blocking end (221) from detaching from the sealing cavity (211a) from the side of the sealing cavity (211a) away from the suction cavity (211b).

3. A suction valve according to claim 1, characterized in that: A sealing ring (230) is installed in the valve cavity (211); the outer peripheral wall of the sealing ring (230) contacts and cooperates with the inner wall of the valve cavity (211); the sealing ring (230) encloses and forms the sealing cavity (211a).

4. A suction valve according to claim 1, characterized in that: The inner wall surface of the gradually contracting section (211a2) transitions smoothly with the inner wall surface of the gradually expanding section (211a1).

5. An endoscope unblocking structure, characterized in that: The suction valve (200) comprises the suction valve (200) according to any one of claims 1 to 4, and further comprises an instrument channel (100), wherein the instrument channel (100) is provided with a distal port, an instrument port and a proximal port in sequence along the axial direction from the distal end thereof; The instrument port has an on state and a closed state, and when the instrument port is in the on state, the instrument port is used to receive a substance injected into the instrument channel (100); The suction valve (200) is installed at the proximal port, and the suction chamber (211b) is in communication with the instrument channel (100).

6. The endoscope unblocking structure according to claim 5, characterized in that: The inner diameter of the instrument channel (100) is less than half the inner diameter of the sealed cavity (211a).

7. An endoscope handle, characterized in that: Includes the endoscope unblocking structure as described in claim 5 or 6.

8. An endoscope, characterized in that: An endoscope handle (10) comprising the one described in claim 7.

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