Suction valve, endoscope obstruction removal structure, endoscope handle, and endoscope

Abstract

A suction valve, an endoscope obstruction removal structure, an endoscope handle, and an endoscope. The suction valve comprises a valve body (210) and a valve stem (220); a valve cavity (211) is formed in the valve body (210); the valve cavity (211) comprises a sealed cavity (211a) and a suction cavity (211b) which are connected to each other; the valve body (210) is provided with a negative pressure channel (212) and an atmospheric channel (213) which are communicated with the valve cavity (211); the valve stem (220) is provided with an occluding end (221); the occluding end (221) is movably arranged in the valve cavity (211); when the occluding end (221) moves in the sealed cavity (211a), the circumferential sidewall of the occluding end (221) is in contact fit with the circumferential sidewall of the sealed cavity (211a), and the occluding end (221) is in a closed position; and when the occluding end (221) moves in the suction cavity (211b), there is a gap between the circumferential sidewall of the occluding end (221) and the circumferential sidewall of the sealed cavity (211a), and the occluding end (221) is in a suction position. The sealed cavity (211a) of the suction valve has a certain axial length. When the suction valve is mounted in an instrument channel (100) and the instrument channel (100) is sealed, by controlling the position of the occluding end (221) in the sealed cavity (211a), the internal pressure of the instrument channel (100) is adjusted to push a stone obstructing the instrument channel (100) to move, so as to restore patency of the instrument channel (100).

Description

A suction valve, an endoscope deblocking structure, an endoscope handle, and an endoscope. Technical Field

[0001] This invention belongs to the field of endoscope technology, specifically relating to a suction valve, an endoscope deblocking structure, an endoscope handle, and an endoscope. Background Technology

[0002] In the treatment of urinary tract stones, current techniques generally use ureteroscopy to treat kidney stones. Specifically, a ureteroscope is inserted into the kidney, and a laser is used to break up the stones in the renal pelvis. Afterward, the broken stones are expelled from the body through the instrument channel by irrigation and negative pressure suction.

[0003] However, in actual operation, stones can easily block the instrument channel, making it difficult for the stones to be expelled from the body and increasing the difficulty of the doctor's operation. Summary of the Invention

[0004] The purpose of this application is to provide a suction valve, an endoscope deblocking structure, an endoscope handle, and an endoscope to solve the aforementioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a suction valve, including a valve body and a valve stem. The valve body has a valve cavity, which includes a sealing cavity and a suction cavity connected together. The valve body also has a negative pressure channel and an atmospheric channel communicating with the valve cavity. The valve stem has a plugging end, which is movably disposed within the valve cavity. When the plugging end moves within the sealing cavity, the circumferential sidewall of the plugging end contacts and engages with the circumferential sidewall of the sealing cavity, and the plugging end is in a closed position. When the plugging end moves within the suction cavity, there is a gap between the circumferential sidewall of the plugging end and the circumferential sidewall of the sealing cavity, and the plugging end is in a suction position.

[0007] Secondly, embodiments of this application provide an endoscope deblocking structure, including the suction valve provided in the first aspect embodiment, and also an instrument channel. The instrument channel is provided with a distal port, an instrument port and a proximal port in sequence along the 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 the substance 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] Thirdly, embodiments of this application provide an endoscope handle, including the endoscope deblocking structure provided in the second aspect embodiment.

[0009] Fourthly, embodiments of this application provide an endoscope, including the endoscope handle provided in the third aspect embodiment.

[0010] The technical solution adopted in this invention can achieve the following beneficial effects:

[0011] In this application, the valve chamber of the suction valve includes a sealing chamber and a suction chamber connected together. The plugging end of the valve stem moves between the sealing chamber and the suction chamber to switch between the plugging end in the closed position and the suction position. When the plugging end moves in the sealing chamber, the plugging end is always 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 size of the space of the sealing chamber connected to the instrument channel can be adjusted by controlling the position of the plugging end in the sealing chamber, thereby controlling the pressure inside the instrument channel. By increasing the pressure in the instrument channel, the stones blocking the instrument channel are pushed to move, so that the instrument channel is opened. Attached Figure Description

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

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

[0014] Figure 2 is a cross-sectional view of the cooperation between the suction valve and the instrument channel provided in some embodiments of this application;

[0015] Figure 3 is a detailed view of section A of Figure 2 in this application;

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

[0017] Figure 5 is a cross-sectional view of the cooperation between the suction valve and the instrument channel provided in some embodiments of this application;

[0018] Figure 6 is a cross-sectional view of the cooperation between the suction valve and the instrument channel provided in some embodiments of this application;

[0019] Figure 7 is a detailed view of section B of Figure 6 in this application;

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

[0021] Figure 9 is a detailed view of section C in Figure 8 of this application;

[0022] Figure 10 is a schematic diagram of the overall structure of the deblocking structure provided in some embodiments of this application;

[0023] Figure 11 is a cross-sectional view of the deblocking structure provided in some embodiments of this application;

[0024] Figure 12 is a detailed view of section D of Figure 11 in this application.

[0025] In the diagram: 10-Endoscope handle, 100-Instrument channel, 200-Suction valve, 210-Valve body, 211-Valve cavity, 211a-Sealing cavity, 211a1-Diverging section, 211a2-Contracting section, 211b-Aspiration cavity, 212-Negative pressure channel, 213-Atmospheric channel, 214-Step section, 215-Valve cap, 220-Valve stem, 221-Blocking end, 230-Sealing ring, 231-Mounting part, 240-Sealing body, 241-Limiting surface, 242-Mounting groove, 300-Connecting valve, 400-Instrument. Detailed Implementation

[0026] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0027] It should be noted that in the various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. 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] This application provides a suction valve 200, as shown in Figures 1 to 8, comprising a valve body 210 and a valve stem 220. The valve body 210 contains a valve cavity 211, and the valve stem 220 is movably disposed within the valve cavity 211. By moving the valve stem 220, its position within the valve cavity 211 is changed, thereby enabling or disabling the suction valve 200.

[0029] The valve chamber 211 includes a sealed chamber 211a and a suction chamber 211b connected together. The valve body 210 also has a negative pressure channel 212 and an atmospheric channel 213 communicating with the valve chamber 211. The negative pressure channel 212 is used to connect a negative pressure suction device, which can suction the valve chamber 211 through the negative pressure channel 212. The atmospheric channel 213 is used to connect the suction valve 200 to the external environment, allowing the valve chamber 211 to communicate with the external environment. In use, the suction valve 200 is directly installed on the channel that needs to be suctioned, such as the instrument channel 100 of an endoscope. The negative pressure suction device can suction out the material in the instrument channel 100 through the negative pressure channel 212.

[0030] The valve stem 220 has a plugging end 221, which is movably disposed within the valve cavity 211. The plugging end 221 can move within the valve cavity 211, changing its position. The sealing cavity 211a and the suction cavity 211b are part of the valve cavity 211, and the plugging end 221 can also move within the sealing cavity 211a and the suction cavity 211b.

[0031] When the sealing end 221 moves within the sealing cavity 211a, the circumferential sidewall of the sealing end 221 contacts and engages with the circumferential sidewall of the sealing cavity 211a. The sealing end 221 directly seals the sealing cavity 211a, severing the communication between the cavities located on both sides of the sealing end 221, and the sealing end 221 is in a closed position. At this time, the negative pressure channel 212 and the atmospheric channel 213 are connected, and the negative pressure suction device connected to the negative pressure channel 212 directly draws in the external environment. However, because the sealing end 221 seals the sealing cavity 211a, the negative pressure suction device connected to the negative pressure channel 212 cannot draw in the channel connected to the suction valve 200.

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

[0033] The sealing chamber 211a and the suction chamber 211b are connected. When the plugging end 221 of the valve stem 220 moves between the sealing chamber 211a and the suction chamber 211b, the plugging 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 to move the plugging end 221 of the valve stem 220 into the suction chamber 211b, so that the plugging 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 to move the plugging end 221 of the valve stem 220 into the sealing chamber 211a, so that the plugging end 221 is in the closed position, the negative pressure channel 212 is connected to the atmospheric channel 213, and is isolated from the channel connected to the suction valve 200.

[0034] The sealing cavity 211a has a certain axial length, and the sealing end 221 remains in a closed position when it moves within the sealing cavity 211a. During endoscopic surgical procedures, the suction valve 200 is installed at the proximal opening of the instrument channel 100, and the valve cavity 211 communicates with the instrument channel 100.

[0035] If the instrument channel 100 is blocked by stones or other substances, with the sealing end 221 in the closed position, the inside of the instrument channel 100 is sealed, and the outside atmosphere is not connected to the inside of the instrument channel 100. At this time, moving the position of the sealing end 221 within the sealed cavity 211a changes the size of the space in the sealed cavity 211a connected to the suction channel. This adjusts the size of the overall space formed by the valve cavity 211 and the instrument channel 100. If the space is filled with an incompressible medium such as liquid, the change in space size will also change the pressure inside the space. By reducing the size of the sealed cavity 211a, the internal pressure of the instrument channel 100 is increased, creating a pressure difference on both sides of the stone or other blockage within the instrument channel 100. This pressure difference pushes the stone or other blockage to move, thereby opening the instrument channel 100.

[0036] By controlling the movement of the valve stem 220 within the valve chamber 211, the pressure inside the instrument channel 100 can be adjusted, thus opening the instrument channel 100 and smoothly expelling stones and other substances from the body, reducing the difficulty of intraoperative operations for doctors and increasing the speed of intraoperative operations.

[0037] It is understandable that when the sealing end 221 is in the closed position, it can also be partially located in the sealing cavity 211a and partially in the suction cavity 211b. When the circumferential sidewall of the portion of the sealing end 221 in the sealing cavity 211a contacts the circumferential sidewall of the sealing cavity 211a, it blocks the communication between the cavities on both sides of the sealing end 221. Even if there is a gap between the circumferential sidewall of the portion of the sealing end 221 in the suction cavity 211b and the circumferential sidewall of the suction cavity 211b, the sealing end 221 will not be in the suction position. Only when the sealing end 221 is completely located in the suction cavity 211b can the gap between the sealing end 221 and the inner wall of the suction cavity 211b connect the valve cavities 211 on both sides of the sealing end 221, thus placing the sealing end 221 in the suction position.

[0038] Compared to the existing suction valve 200, the suction valve 200 provided in this embodiment has a sealing cavity 211a with a certain axial length, and the blocking end 221 can have a certain movement stroke within the sealing cavity 211a. To switch the state of the suction valve 200, the blocking end 221 must move a certain distance. During the movement of the blocking end 221, the size of the sealing cavity 211a communicating with the instrument channel 100 can be adjusted, thereby adjusting the pressure within the instrument channel 100.

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

[0040] The axial distance of the sealing cavity 211a is limited. Therefore, by adjusting the position of the sealing end 221 within the sealing cavity 211a, the range of pressure adjustment within the instrument channel 100 is also limited. By controlling the axial distance of the sealing cavity 211a, the maximum pressure inside the instrument channel 100 is controlled, preventing the pressure inside the instrument channel 100 from exceeding the maximum pressure its wall can withstand, and avoiding structural damage due to excessive internal pressure.

[0041] In some embodiments of this application, the valve cavity 211 further includes a limiting surface 241. Referring to Figures 3, 7, and 9, the limiting surface 241 is located on the side of the sealing cavity 211a away from the suction cavity 211b. The valve stem 220 is limited and engaged with the limiting surface 241 along its moving direction to prevent the sealing end 221 from detaching from the sealing cavity 211a on the side away from the suction cavity 211b. The sealing end 221 is movably disposed inside the valve cavity 211. When the sealing end 221 is located in the sealing cavity 211a, moving the sealing end 221 towards the suction cavity 211b allows the sealing end 221 to detach from the sealing cavity 211a and enter the suction cavity 211b, thus switching the sealing end 221 from a closed position to a suction position. When the sealing end 221 is moved away from the suction chamber 211b, the valve stem 220 is engaged with the limiting surface 241, preventing further movement of the valve stem 220 and thus preventing the sealing end 221 from disengaging from the sealing chamber 211a.

[0042] By setting a limiting surface 241 to limit the movement of the valve stem 220, the valve stem 220 is restricted in its direction of movement. This ensures that the valve stem 220 can only move away from the sealing cavity 211a as it moves toward the suction cavity 211b. This makes it easier for the operator to adjust the position of the sealing end 221 and prevents the sealing end 221 from accidentally moving away from the sealing cavity 211a in the direction away from the suction cavity 211b during the process of adjusting the position of the sealing end 221 in the sealing cavity 211a to adjust the internal pressure of the instrument channel 100. This would cause the suction valve 200 to fail to regulate the internal pressure of the instrument channel 100.

[0043] In some specific embodiments of this application, a sealing ring 230 is installed inside the valve cavity 211. Referring to Figures 1 to 3 and Figures 5 to 7, the outer peripheral wall of the sealing ring 230 contacts and fits with the inner wall of the valve cavity 211, forming a sealing cavity 211a. By directly installing the sealing ring 230 inside the valve body 210, the sealing cavity 211a and the suction cavity 211b, which has a different size and is connected to the sealing cavity 211a, are defined. Due to the thickness limitation of the sealing ring 230, the dimensions of the valve cavities 211 on both sides of the sealing ring 230 are larger than the inner diameter of the sealing ring 230, and both valve cavities 211 on both sides of the sealing ring 230 can be configured as suction cavities 211b.

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

[0045] In some preferred embodiments of this application, the sealing cavity 211a has a gradually expanding section 211a1 located near the suction cavity 211b. Referring to Figures 5 to 7, the diameter of the gradually expanding section 211a1 gradually increases along the direction from the sealing cavity 211a to the suction cavity 211b. The opening of the sealing cavity 211a near the suction cavity 211b forms a funnel-shaped opening. When the sealing end 221 in the suction cavity 211b is moved toward the sealing cavity 211a, the funnel-shaped opening of the sealing cavity 211a makes it easier for the sealing end 221 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 in a sealing fit, and their radial dimensions are equal, or even larger than the inner diameter of the sealing cavity 211a. This configuration provides a better seal for the sealing cavity 211a. However, when the plugging end 221 detaches from the sealing cavity 211a and attempts to re-enter it, due to its size limitations, it is prone to colliding with the step formed between the sealing cavity 211a and the suction cavity 211b, causing the valve stem 220 to become stuck. Therefore, this application provides a gradually expanding section 211a1 with a wider opening, making it easier for the sealing end 221 to enter the gradually expanding section 211a1. Then, the inner wall of the gradually expanding section 211a1 guides the sealing end 221, so that the circumferential sidewall of the sealing end 221 can smoothly contact the circumferential sidewall of the valve cavity 211.

[0047] Valve chamber 211 has a connection port for connecting to instrument channel 100. When suction valve 200 is installed in instrument channel 100, instrument channel 100 is connected to the connection port of valve chamber 211. More preferably, suction chamber 211b is disposed near the connection port relative to sealing chamber 211a, and sealing chamber 211a further includes a tapering section 211a2 connected to expanding section 211a1. Referring to Figures 6 and 7, tapering section 211a2 is located on the side of expanding section 211a1 away from suction chamber 211b, and the diameter of tapering section 211a2 gradually decreases along the direction from sealing chamber 211a to suction chamber 211b.

[0048] As the sealing end 221 of the valve stem 220 moves towards the suction chamber 211b within the converging section 211a2, the size of the sealing end 221 remains constant, but the diameter of the converging section 211a2 gradually changes. Therefore, as the sealing end 221 moves towards the suction chamber 211b, it is gradually compressed by the wall surface corresponding to the converging section 211a2, increasing the resistance to movement. The operator can feel the change in tactile feedback, making it easier to determine the position of the sealing end 221 within the valve chamber 211. Furthermore, when it is not necessary to move the sealing end 221 into the suction chamber 211b, the operator can promptly determine its position and move it back. Simultaneously, due to the increased resistance, moving the sealing end 221 into the suction chamber 211b requires a certain force, which can, to some extent, prevent the valve stem 220 from being accidentally moved into the suction chamber 211b.

[0049] Furthermore, due to the change in size of the tapering section 211a2, as the sealing end 221 moves towards the suction chamber 211b, with the suction valve 200 connected to the blocked instrument channel 100, the rate at which the space formed by the connection between the instrument channel 100 and the valve chamber 211 shrinks is slower, and the rate of increase in internal pressure within the instrument channel 100 is also slower. When the sealing end 221 is in the closed position, the closer it is to the suction chamber 211b, the greater the internal pressure of the instrument channel 100. The slower rate of increase in internal pressure as the sealing end 221 approaches the suction chamber 211b makes it easier for the operator to control the internal pressure of the instrument channel 100 and avoids adverse effects caused by sudden pressure increases.

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

[0051] In some specific embodiments, a sealing body 240 is also provided inside the valve body 210. Referring to Figures 1 to 9, the sealing body 240 has 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 a mounting portion 231 is provided at one end of the sealing ring 230 near the sealing body 240, as shown in Figure 4. A stepped portion 214 is provided on the inner wall of the valve cavity 211. Referring to Figures 3 and 7, the mounting portion 231 is clamped between the end face of the sealing body 240 and the stepped portion 214.

[0052] The sealing cavity 211a formed by the sealing ring 230 is in contact with the plugging end 221. During the movement of the plugging end 221, the contact between the plugging end 221 and the sealing ring 230 is tight, and the friction between them is strong. The mounting part 231 of the sealing ring 230 is clamped between the sealing body 240 and the step part 214, which restricts both directions of movement of the sealing ring 230, thereby stabilizing the position of the sealing ring 230 and preventing the plugging end 221 from driving the sealing ring 230 to move during the movement of the sealing cavity 211a, which could lead to a failure to connect the instrument channel 100.

[0053] The stepped portion 214 of the valve cavity 211 is formed due to the change in the internal dimensions of the valve cavity 211. When the dimensions of the valve cavity 211 increase, the stepped portion 214 will appear at the location where the dimensions change.

[0054] Referring to Figure 9, a mounting groove 242 is provided on the end face of the sealing body 240 near the step portion 214, and the mounting portion 231 of the sealing ring 230 is installed in the mounting groove 242. The sealing ring 230 has an annular structure and is installed in the valve cavity 211. The outer peripheral wall of the sealing ring 230 contacts and engages 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 its installation position. At the same time, the mounting portion 231 also needs to be installed in the mounting groove 242. The engagement of the mounting portion 231 and the mounting groove 242 can also position the sealing ring 230. The two positioning methods work together 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 engagement effect between the sealing end 221 and the sealing cavity 211a.

[0055] In some embodiments of this 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 will reset under the drive of the elastic structure.

[0056] Referring to Figures 1 and 2, 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 an atmospheric passage 213 is located on the valve cap 215, on the side of the suction chamber 211b and the sealing chamber 211a closest to the atmospheric passage 213. By pressing the valve stem 220, during the movement of the valve stem 220 and the switching of the sealing end 221 from the closed position to the suction position, the valve cap 215 is compressed, and at the same time, the atmospheric passage 213 located on the valve cap 215 is also compressed, thereby closing the atmospheric passage 213. After releasing the restriction on the valve stem 220, under the drive of the elastic element, the valve stem 220 returns to its original position, the atmospheric passage 213 reconnects to the valve body, and the sealing end 221 switches from the suction position to the closed position.

[0057] This application also provides an endoscope deblocking structure, as shown in Figures 10 to 12, including the suction valve 200 provided in any of the above embodiments, and an instrument channel 100. The instrument channel 100 is used for the entry of instruments or fluid. The instrument channel 100 is a component of the endoscope. The instrument channel 100 has a distal port, an instrument port, and a proximal port arranged sequentially 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, it is used to receive the substance injected into the instrument channel 100, which is generally a liquid medium, such as physiological saline. The suction valve 200 is installed at the inlet port, and the suction chamber 211b is in communication with the instrument channel 100.

[0058] If the instrument channel 100 is blocked by a stone or other substance, and the blockage is located between the distal end of the instrument channel 100 and the instrument opening, saline solution can be injected into the instrument channel 100 through the instrument opening while keeping the sealing end 221 in the closed position. After the saline solution injection is complete, the instrument opening is closed, creating a sealed space in the portion of the instrument channel 100 between the stone and the suction valve 200, which is also filled with a medium. By moving the valve stem 220, the pressure within the instrument channel 100 is adjusted, creating an unequal pressure on both sides of the stone, forming a pressure difference. Under the action of this pressure difference, the stone is pushed, thereby opening the instrument channel 100. Other substances can include blood clots, foreign bodies, 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 stone. After the stone moves under the drive of the pressure difference, its subsequent movement speed will gradually decrease, which can avoid damage to the human body caused by the stone or other blockages, and has high safety performance.

[0060] During the process of adjusting the internal pressure of the instrument channel 100, the pressure inside the instrument channel 100 can be changed intermittently by moving the valve stem 220 back and forth, making it easier to move the stone.

[0061] A liquid medium can be injected into the instrument channel 100 through the instrument port using a syringe 400, as shown in Figures 10 and 11. After injection, the instrument port can be directly sealed using the syringe 400. In some embodiments, as shown in Figures 10 and 11, a connecting valve 300 can be installed at the instrument port to control the sealing and opening of the instrument port.

[0062] In some embodiments of this application, the internal pressure of the instrument channel 100 is adjusted by controlling the size of the sealing cavity 211a communicating with the instrument channel 100. The larger the inner diameter of the sealing cavity 211a and the smaller the inner diameter of the instrument channel 100, the more obvious the pressure regulation effect on the instrument channel 100. However, due to the size limitations of the various components of the endoscope, the inner diameter of the instrument channel 100 only needs to be less than half the inner diameter of the sealing cavity 211a.

[0063] This application also provides an endoscope handle 10, including the endoscope deblocking structure provided in any of the above embodiments. A portion of the instrument channel 100 is installed in the endoscope handle 10, and a suction valve 200 is installed at a corresponding position on the endoscope handle 10.

[0064] This application also provides an endoscope, including the endoscope handle 10 provided in any of the above embodiments.

[0065] The endoscope provided in this application embodiment can be a nephroscope, or a suction endoscope, bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, 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 within the protection scope of the present invention.

Claims

1. A suction valve, characterized in that, The valve includes a valve body (210) and a valve stem (220). The valve body (210) has a valve cavity (211) inside. The valve cavity (211) includes a sealing cavity (211a) and a suction cavity (211b) connected together. The valve body (210) also has a negative pressure channel (212) and an atmospheric channel (213) communicating with the valve cavity (211). The valve stem (220) has a sealing end (221) which is movably disposed in the valve cavity (211). When the sealing end (221) moves within the sealing cavity (211a), the circumferential sidewall of the sealing end (221) contacts and engages with the circumferential sidewall of the sealing cavity (211a), and the sealing end (221) is in the closed position; when the sealing end (221) moves within the suction cavity (211b), there is a gap between the circumferential sidewall of the sealing end (221) and the circumferential sidewall of the suction cavity (211b), and the sealing end (221) is in the suction position.

2. The suction valve according to claim 1, characterized in that, The valve chamber (211) further includes a limiting surface (241), which is located on the side of the sealing chamber (211a) away from the suction chamber (211b). The valve stem (220) is limited and engaged with the limiting surface (241) along its moving direction to prevent the sealing end (221) from detaching from the sealing chamber (211a) on the side of the sealing chamber (211a) away from the suction chamber (211b).

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

4. The suction valve according to claim 1, characterized in that, The sealing cavity (211a) has a gradually expanding section (211a1) located near the suction cavity (211b), and the diameter of the gradually expanding section (211a1) gradually increases along the direction from the sealing cavity (211a) to the suction cavity (211b).

5. A suction valve according to claim 4, characterized in that, The valve chamber (211) further includes a connection port for connecting to the instrument channel (100). The suction chamber (211b) is located near the connection port relative to the sealing chamber (211a). The sealing chamber (211a) further includes a tapering section (211a2) connected to the expanding section (211a1). The tapering section (211a2) is located on the side of the expanding section (211a1) away from the suction chamber (211b). Along the direction from the sealing chamber (211a) to the suction chamber (211b), the diameter of the tapering section (211a2) gradually decreases.

6. A suction valve according to claim 5, characterized in that, The inner wall surface of the tapering section (211a2) and the inner wall surface of the expanding section (211a1) transition smoothly.

7. An endoscope deblocking structure, characterized in that, The device includes the suction valve (200) according to any one of claims 1-6, and further includes 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 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 substances injected into the instrument channel (100). The suction valve (200) is installed at the proximal port, and the suction chamber (211b) is connected to the instrument channel (100).

8. An endoscope deblocking structure according to claim 7, characterized in that, The inner diameter of the instrument channel (100) is less than half the inner diameter of the sealing cavity (211a).

9. An endoscope handle, characterized in that, Includes the endoscope deblocking structure as described in claim 7 or 8.

10. An endoscope, characterized in that, Includes an endoscope handle (10) as described in claim 9.

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