Endoscope and suction valve thereof

Abstract

The utility model provides an endoscope suction valve and an endoscope, and relates to the technical field of endoscopes. The suction valve comprises a bonnet and a valve seat, two ends of the valve seat are respectively provided with an air channel and a suction channel, and the middle of the valve seat is provided with a negative pressure channel; the valve element is movably arranged in the valve seat so as to be switched between a first state and a second state, a cavity is formed between the valve seat and the valve element, the air channel, the cavity and the negative pressure channel form a first flow channel, and the suction channel, the cavity and the negative pressure channel form a second flow channel; the first sealing element and the second sealing element are arranged on the valve core; when the valve element is in the first state, the air channel is located on the lower side of the second sealing piece, the first flow channel is communicated, and the first sealing piece cuts off the second flow channel. When the valve element is switched to the second state, the second sealing piece moves to the position on the lower side of the air channel along with the valve element so as to cut off the first flow channel; the first sealing member opens the suction channel so as to communicate the second flow channel. The suction valve can be effectively protected, the size of the suction valve is controlled, and the fatigue feeling of a user in use is reduced.

Description

Technical Field

[0001] This application relates to the field of medical devices, and more specifically to an endoscope and its suction valve. Background Technology

[0002] In modern medical diagnosis and treatment, endoscopes are often used in minimally invasive surgery to visualize the morphology of organs and tissues inside the patient's body, thereby more intuitively determining the patient's condition, such as the location of diseased tissue. Suction valves are often installed in the endoscope; by controlling the connection between the negative pressure end and the suction tube, they can aspirate accumulated fluid from diseased tissue inside the body, remove diseased tissue, or stop suction.

[0003] In related technologies, the suction valve stops aspiration by disconnecting the negative pressure end from the sample tubing. Continuous suction from the negative pressure end can damage the suction valve's chamber. Directly connecting the sample tubing to the negative pressure end when switching suction states makes it difficult to control the suction rate. During surgery, doctors need to hold the handle for extended periods and frequently press the suction valve; excessively long pressing strokes increase doctor fatigue, thus affecting surgical precision. Utility Model Content

[0004] In order to solve one or more technical problems mentioned in the background art, one embodiment of this application provides an endoscope suction valve with short pressing stroke, durability and precise suction control.

[0005] In one embodiment, the endoscopic suction valve includes a valve cap and a valve seat, wherein an air passage and a suction passage are respectively provided at both ends of the valve seat, and a negative pressure passage is provided in the middle of the valve seat;

[0006] The suction valve also includes:

[0007] A valve core is movably disposed inside the valve seat to switch between a first state and a second state. A chamber is formed between the valve seat and the valve core. The air passage, the chamber, and the negative pressure passage form a first flow channel. The suction passage, the chamber, and the negative pressure passage form a second flow channel.

[0008] A first seal and a second seal are disposed on the valve core;

[0009] When the valve core is in the first state, the air passage is located below the second seal, the first flow channel is connected, and the first seal isolates the second flow channel;

[0010] When the valve core switches to the second state, the second seal moves with the valve core to the position below the air passage to block the first flow channel; the first seal opens the suction channel and connects the second flow channel.

[0011] This embodiment offers the following advantages: the operator can close the air passage and switch the suction valve state by pressing a short-stroke button, effectively reducing operator fatigue. Compared to complex push-button valves, this valve has a simplified structure and lower requirements for component dimensions, making it easier to design in a smaller size. When suction stops, it draws in outside air through the airflow channel, effectively protecting the suction valve.

[0012] Another embodiment of this application provides an endoscope suction valve with a simple structure and easily controllable size. The suction valve includes a valve cap and a valve seat. One end of the valve seat is provided with a suction channel, and the middle of the valve seat is provided with a negative pressure channel.

[0013] The suction valve also includes:

[0014] The valve core is movably disposed inside the valve seat to switch between a first state and a second state. A chamber is formed between the valve core and the valve seat. The suction channel, the chamber, and the negative pressure channel form a third flow channel.

[0015] A first seal is disposed on the valve core;

[0016] When the valve core is in the first state, the first seal blocks the third flow channel. When the valve core is switched to the second state, the first seal opens the suction channel to connect the third flow channel.

[0017] This application also provides an endoscope, including the endoscope suction valve described in any of the above embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the suction valve after being cut open according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the suction valve according to an embodiment of the present invention.

[0021] Figure 3This is a schematic diagram of the structure of a suction valve with its valve core in a second state according to an embodiment of the present invention, after being cut open.

[0022] Figure 4 This is a schematic diagram of the limiting part of the suction valve in one embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the suction valve after it has been cut open in another embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the suction valve after it has been cut open in another embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the endoscope in one embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] In the description of this invention, the use of terms such as "first" and "second" is merely to distinguish different components and does not indicate or imply the number or importance of components or the sequential relationship between components.

[0029] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "certain embodiments," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] In the field of endoscopy, a suction valve is often located in the endoscope handle to control the connection between the suction tube and the negative pressure tube. Such endoscopes are typically disposable flexible endoscopes. The negative pressure source connected to the negative pressure tube provides suction force to the suction valve. The endoscope is directly or indirectly connected to the body through the suction tube. The flow channel formed by the negative pressure tube and the suction tube allows for effective aspiration of materials to be removed (such as fluid accumulation in diseased tissues within the body, as well as removed diseased tissue).

[0031] The operator controls the flow channel by pressing the valve cap. When the flow channel is cut off, the negative pressure source draws suction into the chamber of the suction valve, creating a negative pressure state in the chamber. However, excessive suction can damage the suction valve. Furthermore, prolonged holding of the endoscope and frequent pressing of the valve cap can strain the operator's hand and hinder precise suction control.

[0032] To address the aforementioned technical problems, this application provides a suction valve. For ease of understanding, a typical suction valve will first be described with reference to the accompanying drawings. Figure 1-3 , Figure 1 This is a cross-sectional view of the suction valve in its first state. Figure 2 This is an overall structural diagram of the suction valve. Figure 3 This is a cross-sectional view of the suction valve in its second state.

[0033] The suction valve includes a valve cap 110 and a valve seat 120. Air passages 163 and suction passages 162 are respectively provided at both ends of the valve seat 120, and a negative pressure passage 161 is provided in the middle of the valve seat 120. The suction valve also includes a valve core 130, which is movably disposed inside the valve seat 120 to switch between a first state and a second state. A chamber 170 is formed between the valve seat 120 and the valve core 130. The air passage 163, the chamber 170, and the negative pressure passage 161 form a first flow channel, and the suction passage 162, the chamber 170, and the negative pressure passage 161 form a second flow channel.

[0034] A first seal 151 and a second seal 152 are disposed on the valve core 130. When the valve core 130 is in the first state, the air passage 163 is located below the second seal 152, the first flow channel is connected, and the first seal 151 blocks the second flow channel. When the valve core 130 switches to the second state, the second seal 152 moves with the valve core 130 to the position below the air passage 163 to block the first flow channel. The first seal 151 opens the suction channel 162, thereby connecting the second flow channel.

[0035] In some embodiments, the valve seat 120 serves as the main component of the suction valve, possessing a multi-purpose connection function, selectively connecting multiple components. An external valve housing 140 is provided, which protects the internal components of the suction valve and connects various components of the endoscope. The valve seat 120 has an axially hollow channel inside, which can accommodate a valve core 130 aligned with its axial direction. An outlet chamber 170 is formed between the valve seat 120 and the valve core 130.

[0036] The valve cap 110 is located at one end of the valve core 130 and the two are connected to each other. By pressing the valve cap 110, the valve core 130 can be moved along the axial direction of the valve seat 120.

[0037] In some embodiments, reference Figure 1 In the axial direction X of the valve core 130, the air passage 163 is located closer to the valve cap 110, the suction passage 162 is located further away from the valve cap 110, and the negative pressure passage 161 is located between the air passage 163 and the suction passage 162. That is, viewed from the axial direction X of the valve seat 120 or the valve core 130, from the valve cap end to the end further away from the valve cap, the air passage 163, the negative pressure passage 161, and the suction passage 162 are arranged sequentially in this order in the axial direction, and it is not required that the air passage 163 must be connected to or near the end cap. The air passage 163, the chamber 170, and the negative pressure passage 161 are connected to form the first flow channel, and air enters the chamber 170 from the air passage 163 and then flows into the negative pressure passage 161. (Reference) Figure 3 The suction channel 162, chamber 170, and negative pressure channel 161 constitute a second flow channel. After being drawn into the suction channel 162, the material flows through the chamber 170 into the negative pressure channel 161. In some examples, the suction channel 162 and the valve seat 120 may be integrated, rather than being two separate components.

[0038] In some embodiments, reference Figure 1 The suction valve also includes a valve housing 140, which can be used to protect the suction valve. The valve housing 140 can be used to connect the suction valve to other endoscope components. In some embodiments, the valve housing 140 includes a valve housing channel 141 for connecting the suction channel 162, that is, the valve housing channel 141 communicates with the second flow channel.

[0039] In some embodiments, the valve seat 120 and the valve body 140 may be made of the same material, meaning that they are not separate components in this case, but rather a single unit.

[0040] In some embodiments, the seals cooperate with the valve seat 120, valve core 130, and valve housing 140 to cut off the flow path, thereby enabling the switching of different states of the suction valve. A first seal 151 is disposed on the valve core 130 to isolate the chamber 170 and suction channel 162 from the outside, thus cutting off the second flow path. A second seal 152 is disposed on the valve core 130 to isolate the chamber 170 connected to the negative pressure channel 161 from the air channel 163, thus cutting off the first flow path. The second seal 152 and the valve core 130 can be fixedly connected or detachably connected.

[0041] For ease of description, when viewed in the axial direction of the valve seat 120 or valve core 130, the end furthest from the valve cap 110 is called the "far end", and the end closest to it is called the "proximal end".

[0042] In some embodiments, reference Figure 1 and Figure 3 The valve cap 110 moves the valve core 130, changing the relative position of the seals and switching the valve core 130 to either the first or second state. When the valve core 130 is in the first state, the air passage 163 is located below the second seal 152, meaning the distal end of the air passage 163 is further away from the valve cap 110 than the distal end of the second seal 152, thus opening the first flow channel. The suction valve draws air through the air passage 163, at which point the second flow channel is blocked by the first seal 151.

[0043] From another perspective, the second seal 152 divides the valve chamber 170 into a proximal chamber and a distal chamber, with the two chambers blocked by the second seal 152. When the valve core 130 is in the first state, the air passage 163, the lower valve chamber, and the negative pressure passage 161 are connected, and the first flow channel is opened.

[0044] When the valve core 130 switches to the second state, the second seal 152 moves distally, that is, it disconnects the part of the chamber 170 connected to the negative pressure channel 161 and the air channel 163, thereby isolating the first flow channel. The second seal 152 moving to the lower side of the air channel 163 means that the distal end of the second seal 152 is farther away from the valve cap 110 than the distal end of the air channel 163. By changing the relative position of the valve core 130 and the first seal 151, the second flow channel is opened, thereby allowing the material to be sucked up.

[0045] In some embodiments, the second seal 152 may be an annular component fixed to the valve core 130, which is disposed between the valve core 130 and the valve seat 120 to divide the chamber 170 into two parts, namely a proximal chamber and a distal chamber. When the valve core 130 is in the first state, the distal chamber is connected to the air passage 163 and the negative pressure passage 161, thereby opening the first flow channel and drawing air from the suction valve. When the valve core 130 is in the second state, the proximal chamber is connected to the air passage 163, and the distal chamber is connected to the negative pressure passage 161 and the suction passage 162, thereby blocking the first flow channel and opening the second flow channel to draw out the object to be sucked out.

[0046] In some embodiments, the second seal 152 can be an elastic component, thereby isolating or connecting the first flow channel. The valve core 130 and valve seat 120 compress the elastic second seal 152, causing deformation and achieving tight contact between the second seal 152 and the valve core 130 and valve seat 120, thus better sealing and isolating the first flow channel. When the valve core 130 moves, it drives the elastic second seal 152 to move as well; the elasticity of the elastic component reduces resistance as it moves with the valve core 130.

[0047] Elastic components are made of elastic materials with elastic deformation properties, such as rubber and its modified materials, silicone, thermoplastic elastomers, polytetrafluoroethylene, foam materials, polymer films, soft metals, ceramic fibers, elastic polyesters or elastic fibers.

[0048] The elastic second seal 152 does not need to remain in a deformed state at all times. In other embodiments, the valve core 130 can be deformed at a certain moment during the switching process while the state remains unchanged.

[0049] In some embodiments, the second seal 152 can be an annular elastic element, which can effectively isolate the air connection between the proximal chamber and the distal chamber, thereby more effectively improving airtightness and facilitating the movement of the second seal 152.

[0050] In some embodiments, the second seal can be an annular rubber ring to isolate the first flow channel. After deformation, the rubber ring tightly fits and seals the gap between the valve core 130 and the valve seat 120, reducing airflow between the proximal and distal chambers. This is more advantageous in isolating the first flow channel when the valve core 130 is in the second state, preventing the negative pressure valve from drawing in atmospheric air, thereby improving the suction efficiency of the suction valve.

[0051] In some embodiments, when the valve core 130 is in the first state, the distal end of the second seal 152 is close to the proximal end of the air channel 163, allowing the valve core 130 to cut off the first flow channel more quickly when switching states. This means the operator only needs a short press to cut off the first flow channel. In endoscope usage scenarios, users need to hold the instrument for extended periods and frequently press and suction; a short press reduces hand fatigue and improves operational accuracy and smoothness. The width of the second seal 152 and the air channel 163 is not specifically required, as long as it enables the first flow channel to be connected or disconnected when the valve core 130 switches states. Furthermore, the air channel 163 can be an air vent.

[0052] In some embodiments, the suction channel 162 and the first seal 151 are preferably made of elastic materials, thereby achieving a tighter contact through elastic deformation during deformation and better isolating the second flow channel. This ensures that the suction channel has no suction when suction is not required, guaranteeing the safety of the surgical procedure. In some instances, the suction channel 162 may be part of the valve seat 120, meaning the suction channel 162 is not a component disposed on the valve seat 120. In this case, the first seal 151 can also isolate the second flow channel by abutting against the valve seat 120.

[0053] In some embodiments, the valve cap 110 includes an end cap 111 and an elastic element 112, the elastic element 112 being disposed between the end cap 111 and the valve seat 120. The valve core 130 is connected to the end cap 111 and / or the elastic element 112, and the end cap 111 is used to transmit pressure to the elastic element. When the end cap 111 is pressed, the valve core 130 switches from a first state to a second state, and the elastic element 112 is compressed by the end cap 111, resulting in elastic deformation. When the pressure is released, the elastic element 112, due to its accumulated elastic potential energy, drives the end cap 111 and the valve core 130 to reset, causing the valve core 130 to switch from the second state to the first state. The elastic element 112 only needs to achieve the above functions; its shape can be spring-like, coil-like, or block-like, and its material can be rubber, foam, bellows, shape memory alloy, etc.

[0054] When the elastic element drives the valve core 130 to reset, the elastic element 112 can still retain elastic potential energy, causing the valve core 130 to be directly or indirectly subjected to a force toward the valve cap 110, thereby causing the first sealing element 151 at the distal end of the valve core 130 to abut against the suction channel 162. When the first sealing element 151 and the suction channel are made of elastic materials, the second flow channel can be better isolated.

[0055] Users can open the second flow channel by pressing the suction valve to suck up the material to be sucked out. When suction is no longer needed, pressing stops, and the suction valve will reset under the action of the elastic element 112, automatically closing the second flow channel to stop suction, without needing to press again to close the flow channel. This is more precise and effortless, reducing fatigue caused by prolonged holding and pressing.

[0056] Furthermore, the end cap 111 and the elastic element 112 may be provided with a covering component to facilitate the operator to press the valve cap 110. The end cap 111 may be made of a relatively hard material to make the feedback when pressed clearer, allowing the operator to more clearly perceive the triggering effect of the button, which is suitable for scenarios requiring precise feedback.

[0057] In some embodiments, the valve housing 140 is connected to the distal end of the valve seat 120, and the suction channel 162 extends from the side of the valve housing 140, with the suction channel 162 at an angle to the axis of the valve core 130, meaning the suction channel 162 and the axis of the valve core 130 do not coincide. This makes the suction valve shorter in the axial direction X of the valve core 130, which is more conducive to reducing the size of the suction valve and making it easier for the user to grip. Compared to the scenario where the suction channel 162 coincides with the axis of the valve core 130, when the suction channel 162 is set on the side, the valve core 130 only needs a short stroke to increase the flow rate of the first flow channel, allowing the valve core 130 to quickly complete the state switching and reducing the burden on the user.

[0058] In some embodiments, the air passage 163 and the suction passage 162 are disposed on one side of the valve seat, and the negative pressure passage 161 is disposed on the other side of the valve seat.

[0059] In some embodiments, reference Figure 4 The valve seat 120 is provided with a limiting part 180, and the valve housing 140 abuts against the limiting part 180. The valve housing 140 provides support for the valve seat 120 through the limiting part 180. When the user presses the valve cap 110, the valve cap 110 applies a force to the valve seat 120 while driving the valve core 130 to move. Under frequent pressing during surgery, the first sealing element 151 and the suction channel 162, which are in direct or indirect contact with the valve seat 120, are easily damaged, thereby affecting the effect of isolating the second flow channel and causing the product to operate when suction is not required, resulting in a risk of product use.

[0060] The limiting part 180 provided on the valve housing 140 can protect the first seal 151 and the valve seat 120. When the operator presses the valve cap 110, the limiting part 180 provides support to the valve seat 120, and transmits the pressure on the valve seat 120 to the valve housing 140 through the limiting part, so that the first seal 151 is not subjected to pressure, thereby improving the service life of the suction valve. In some embodiments, the valve seat is also provided with a fixing part 190, which can be used to connect the valve seat 120 and the endoscope handle.

[0061] This application also provides a short-stroke, labor-saving, and simple suction valve that can effectively reduce user fatigue during surgery.

[0062] The suction valve includes a valve cap 210 and a valve seat 220. One end of the valve seat has a suction channel, and the middle of the valve seat 220 has a negative pressure channel 261. The suction valve also includes a valve core 230, which is movably disposed inside the valve seat 220 to switch between a first state and a second state. A chamber 270 is formed between the valve core 230 and the valve seat 220. The suction channel 262, the chamber 270, and the negative pressure channel 261 form a third flow channel. A first sealing element 251 is disposed on the valve core 230. When the valve core 230 is in the first state, the first sealing element 251 blocks the third flow channel. When the valve core switches to the second state, the first sealing element 251 opens the suction channel 262, thereby connecting the third flow channel.

[0063] In one embodiment, the suction valve further includes a valve housing 240. When the valve core 230 is in the first state, the valve core 230 can communicate with the outside through the negative pressure channel 261 and the chamber 270 via the valve housing 240 and / or the valve cap 210. In this embodiment, outside air can be drawn in through the gap between the valve housing 240 and / or the valve cap 210, thereby preventing the valve chamber from being drawn in and protecting the suction valve.

[0064] In one embodiment, when a third seal 253 is present on the suction valve, the first seal 251 and the third seal 253 are used to seal the chamber 270.

[0065] The present invention also provides an endoscope, such as Figure 7 The endoscope is characterized by containing any of the aforementioned suction valves. It includes a suction valve 1000, a handle assembly 2000, an instrument access section 3000, a communication transmission section 4000, and a tube section 5000. The handle assembly 2000 is primarily used for gripping and serves as the main body for connecting other components. The instrument access section 3000 provides an insertion channel for other surgical instruments. The communication transmission section 4000 can transmit images to an external terminal. The tube section 5000 contains components such as a snake-bone tube and a lens, used for insertion into the patient for observation and aspiration of materials to be aspirated. The suction valve 1000 is connected to the tube section 5000 via a suction tube, and aspiration can be controlled by pressing the suction valve 1000.

[0066] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0067] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The description of the embodiments above is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An endoscope suction valve, characterized in that, The suction valve includes a valve cap and a valve seat. The valve seat has an air passage and a suction passage at both ends, and a negative pressure passage in the middle. The suction valve also includes: A valve core is movably disposed inside the valve seat to switch between a first state and a second state. A chamber is formed between the valve seat and the valve core. The air passage, the chamber, and the negative pressure passage form a first flow channel. The suction passage, the chamber, and the negative pressure passage form a second flow channel. A first seal and a second seal are disposed on the valve core; When the valve core is in the first state, the air passage is located below the second seal, connecting the first flow channel, and the first seal blocks the second flow channel; When the valve core switches to the second state, the second seal moves with the valve core to the position below the air passage to block the first flow channel; the first seal opens the suction channel and connects the second flow channel.

2. The endoscopic suction valve according to claim 1, characterized in that, The second seal is an annular component.

3. The endoscopic suction valve according to claim 1, characterized in that, The second seal is an elastic component.

4. The endoscopic suction valve according to claim 1, characterized in that, The second seal is an annular elastic element.

5. The endoscopic suction valve according to claim 1, characterized in that, The suction valve also has a valve body.

6. The endoscopic suction valve according to claim 1, characterized in that, The valve cap includes an end cap and an elastic element. The elastic element is disposed between the end cap and the valve seat. When the valve core switches from the first state to the second state, the elastic element is squeezed by the end cap and deformed. When the valve core switches from the second state to the first state, the elastic element drives the end cap to reset.

7. The endoscopic suction valve according to claim 5, characterized in that, A valve housing channel extends from the side of the valve housing, and the valve housing channel is at an angle to the axis of the valve core.

8. The endoscopic suction valve according to claim 1, characterized in that, The air passage is an air hole provided on the valve seat.

9. The endoscopic suction valve according to claim 1, characterized in that, The air passage and the suction passage are located on one side of the valve seat, and the negative pressure passage is located on the other side of the valve seat.

10. The endoscopic suction valve according to claim 5, characterized in that, The valve seat is provided with a limiting part, the valve body abuts against the limiting part, and the limiting part provides support for the valve seat.

11. An endoscope suction valve, characterized in that, The suction valve includes a valve cap and a valve seat, with a suction channel at one end of the valve seat and a negative pressure channel in the middle of the valve seat; The suction valve also includes: The valve core is movably disposed inside the valve seat to switch between a first state and a second state. A chamber is formed between the valve core and the valve seat. The suction channel, the chamber, and the negative pressure channel form a third flow channel. A first seal is disposed on the valve core. When the valve core is in the first state, the first seal blocks the third flow channel. When the valve core is switched to the second state, the first seal opens the suction channel to connect the third flow channel.

12. The endoscopic suction valve according to claim 11, characterized in that, The suction valve also has a valve housing. When the valve core is in the first state, the negative pressure channel and the chamber are connected to the outside through the valve housing and / or the valve cap.

13. The endoscopic suction valve according to claim 12, characterized in that, The valve core is provided with a third sealing element, and the first sealing element and the third sealing element are used to seal the chamber.

14. An endoscope, characterized in that, It includes the suction valve as described in any one of claims 1-13.

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