Endoscope and suction valve thereof

Abstract

The invention 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] The present application relates to the field of medical devices, and more specifically to an endoscope and a suction valve thereof. Background Art

[0002] In modern medical diagnosis and treatment, endoscopes are often used in minimally invasive surgery to present the morphology of organs and tissues in the patient's body, so as to more intuitively determine the patient's condition, such as the location of the diseased tissue. The suction valve is often set in the endoscope, and by controlling the connection of the negative pressure end and the suction pipeline, the effect of sucking out the accumulated fluid and the removed diseased tissue in the human body, or stopping the suction, can be achieved.

[0003] In the related art, the suction stop state of the suction valve is achieved by cutting off the connection between the negative pressure end and the sample pipe, and the continuous suction of the suction valve chamber by the negative pressure end will cause a certain degree of damage to the suction valve. Directly connecting the sample pipe to the negative pressure end when switching the suction state will make it difficult to control the suction rate. During the operation, the doctor needs to hold the handle for a long time and frequently press the suction valve for suction. If the pressing stroke is too long, it will increase the doctor's fatigue, thereby affecting the accuracy of the operation. Summary of the invention

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

[0005] In one embodiment, the endoscope suction valve comprises a valve cap and a valve seat, the 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;

[0006] The suction valve further comprises:

[0007] a valve core, the valve core being movably disposed inside the valve seat to switch between a first state and a second state, a chamber being formed between the valve seat and the valve core, the air channel, the chamber and the negative pressure channel forming a first flow channel, and the suction channel, the chamber and the negative pressure channel forming a second flow channel;

[0008] A first sealing member and a second sealing member, wherein the first sealing member and the second sealing member are arranged on the valve core;

[0009] When the valve core is in the first state, the air passage is located at a position below the second sealing member, the first flow passage is connected, and the first sealing member blocks the second flow passage;

[0010] When the valve core switches to the second state, the second sealing member moves with the valve core to a position below the air channel to block the first flow channel; the first sealing member opens the suction channel to connect the second flow channel.

[0011] This embodiment has the following beneficial effects: the operator can close the air channel to switch the suction valve state by pressing a short stroke, which can effectively reduce the operator's fatigue. Compared with the complicated structure of the push valve, the push valve has a simple structure and does not require high dimensions of the original part, making it easier to design into a small size. When the suction is stopped, the outside atmosphere is sucked in through the air flow channel, effectively protecting the suction valve.

[0012] Another embodiment of the present application provides an endoscope suction valve with a simple structure and easily controllable size, the suction valve comprising 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 further comprises:

[0014] A valve core, the valve core is movably arranged 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, and the suction channel, the chamber and the negative pressure channel form a third flow channel;

[0015] A first sealing member, wherein the first sealing member is disposed on the valve core;

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

[0017] An embodiment of the present application also provides an endoscope, comprising the endoscope suction valve described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

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

[0022] Figure 4 It is a schematic structural diagram of a limiting portion of a suction valve in an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of a suction valve after being cut open in another embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of a suction valve after being cut open in another embodiment of the present invention.

[0025] Figure 7 Schematic diagram of the structure of an endoscope in one embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, if there are terms such as first and second, they are only used to distinguish different components, rather than indicating or implying the number and importance of the components or the order of precedence between the components.

[0029] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "some embodiments", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0030] In the field of endoscopes, a suction valve is often set in the handle of an endoscope to control the connection between the suction pipeline and the negative pressure pipeline. Such endoscopes are usually disposable soft endoscopes. The negative pressure source connected to the negative pressure pipeline provides suction force for the suction valve. The endoscope is directly or indirectly connected to the human body through the suction pipeline. Through the flow channel formed by the negative pressure pipeline and the suction pipeline, the material to be sucked out (such as the effusion of the diseased tissue in the human body and the removed diseased tissue) can be effectively sucked out.

[0031] The operator controls the cut-off or connection of the flow channel by pressing the valve cap. When the flow channel is cut off, the negative pressure source sucks the chamber of the suction valve to make the chamber of the suction valve in a negative pressure state, but excessive suction will cause damage to the suction valve. At the same time, the operator holds the endoscope for a long time and presses the valve cap frequently, which will put a burden on the hand and is not conducive to accurate control of suction.

[0032] In order to solve the above technical problems, the embodiment of the present application provides a suction valve. For ease of understanding, a typical suction valve is first described in conjunction with the accompanying drawings. Figure 1-3 , Figure 1 is a cross-sectional view of the suction valve in a first state, Figure 2 is the overall structural diagram of the suction valve, Figure 3 It is a cross-sectional view of the suction valve in the second state.

[0033] The suction valve includes a valve cap 110 and a valve seat 120. The two ends of the valve seat 120 are respectively provided with an air channel 163 and a suction channel 162. A negative pressure channel 161 is provided in the middle of the valve seat 120. The suction valve also includes a valve core 130. The valve core 130 is movably arranged 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 channel 163, the chamber 170 and the negative pressure channel 161 form a first flow channel. The suction channel 162, the chamber 170 and the negative pressure channel 161 form a second flow channel.

[0034] The first seal 151 and the second seal 152 are disposed on the valve core 130. When the valve core 130 is in the first state, the air channel 163 is located at the lower side of 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 is switched to the second state, the second seal 152 moves with the valve core 130 to the lower side of the air channel 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 is a main component of the suction valve, has a multi-purpose connection function, and can selectively connect multiple components. A valve housing 140 is provided on the outside thereof, and the valve housing 140 can be used to protect the internal components of the suction valve and connect the various components of the endoscope. An axially hollow channel is provided inside the valve seat 120, which can be used to accommodate the valve core 130 in the same axial direction as the valve seat 120, and a chamber 170 is formed between the valve seat 120 and the valve core 130.

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

[0037] In some embodiments, reference Figure 1 , in the axial direction X of the valve core 130, the air channel 163 is arranged at the end closer to the valve cap 110, the suction channel 162 is arranged at the end farther away from the valve cap 110, and the negative pressure channel 161 is arranged between the air channel 163 and the suction channel 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 farther away from the valve cap, the air channel 163, the negative pressure channel 161, and the suction channel 162 are arranged in sequence, and they are arranged in this order in the axial direction, but it does not limit the air channel 163 to be connected to or close to the end cap. The air channel 163, the chamber 170 and the negative pressure channel 161 are connected to form a first flow channel, and the air enters the chamber 170 from the air channel 163 and then flows into the negative pressure channel 161. Reference Figure 3 The suction channel 162, the chamber 170 and the negative pressure channel 161 constitute a second flow channel, and the aspirate is sucked into the suction channel 162 and then flows into the negative pressure channel 161 through the chamber 170. In some examples, the suction channel 162 and the valve seat 120 can be integrated rather than two independent components.

[0038] In some embodiments, reference Figure 1 The suction valve further 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 with other endoscope components. In some embodiments, the valve housing 140 includes a valve housing channel 141, which is used to connect the suction channel 162, that is, the valve housing channel 141 is connected to the second flow channel.

[0039] In some embodiments, the valve seat 120 and the valve housing 140 may be made of the same material, that is, the two are not independent components in this case, but are an integral whole.

[0040] In some embodiments, the seal is used to cooperate with the valve seat 120, the valve core 130 and the valve housing 140 to cut off the flow channel to achieve the switching of different states of the suction valve. The first seal 151 is arranged on the valve core 130 to cut off the connection between the chamber 170 and the suction channel 162 and the outside world, thereby cutting off the second flow channel. The second seal 152 is arranged on the valve core 130 to cut off the connection between the chamber 170 connected to the negative pressure channel 161 and the air channel 163, thereby cutting off the first flow channel. The second seal 152 and the valve core 130 can be fixedly connected or detachably connected.

[0041] For the convenience of description, viewed in the axial direction of the valve seat 120 or the valve core 130 , the end away from the valve cap 110 is called the “distal end”, and the end close to the valve cap 110 is called the “proximal end”.

[0042] In some embodiments, reference Figure 1 and Figure 3 The valve cap 110 drives the valve core 130 to change the relative position of the seal, so that the valve core 130 switches to the first state or the second state. When the valve core 130 is in the first state, the air channel 163 is located at the lower side of the second seal 152, that is, the distal end of the air channel 163 is farther away from the valve cap 110 than the distal end of the second seal 152, so that the first flow channel is in the connected state. The suction valve draws air through the air channel 163, and at this time, the second flow channel is blocked by the first seal 151.

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

[0044] When the valve core 130 is switched to the second state, the second sealing member 152 moves to the distal end, that is, the connection between the portion of the chamber 170 communicating with the negative pressure channel 161 and the air channel 163 is cut off, thereby cutting off the first flow channel, and the second sealing member 152 moves to the lower side of the air channel 163, that is, the distal end of the second sealing member 152 is further 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 sealing member 151, the second flow channel is opened, so that the object to be sucked out can be sucked.

[0045] In some embodiments, the second sealing member 152 may be an annular member fixed to the valve core 130, and the annular member 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 channel 163 and the negative pressure channel 161, thereby connecting the first flow channel and the suction valve sucking air. When the valve core 130 is in the second state, the proximal chamber is connected to the air channel 163, and the distal chamber is connected to the negative pressure channel 161 and the suction channel 162, thereby isolating the first flow channel and connecting the second flow channel to suck the object to be sucked out.

[0046] In some embodiments, the second sealing member 152 may be an elastic member, thereby blocking or connecting the first flow channel. The valve core 130 and the valve seat 120 squeeze the elastic second sealing member 152 to cause deformation, thereby achieving close contact between the second sealing member 152 and the valve core 130 and the valve seat 120, thereby better sealing and blocking the first flow channel. When the valve core 130 moves, the elastic second sealing member 152 is driven to move, and the elasticity of the elastic member makes it have less resistance when it moves with the valve core 130.

[0047] The elastic component is made of an elastic material with elastic deformation performance, such as rubber and its modified materials, silicone, thermoplastic elastomer, polytetrafluoroethylene, foam material, polymer film, soft metal, ceramic fiber, elastic polyester or elastic fiber.

[0048] The elastic second sealing member 152 does not need to maintain the deformed state all the time. In other embodiments, the valve core 130 may be deformed when the state remains unchanged and / or at a certain moment during the switching process.

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

[0050] In some embodiments, the second sealing member may be an annular rubber ring to block the first flow channel, and the rubber ring is tightly fitted to close the gap between the valve core 130 and the valve seat 120 after deformation, reducing the air circulation between the proximal chamber and the distal chamber. It is more conducive to blocking the first flow channel when the valve core 130 is in the second state, so that the negative pressure valve does not extract the atmosphere, 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 sealing member 152 is close to the proximal end of the air channel 163, so that the first flow channel can be cut off more quickly when the valve core 130 switches states, that is, the operator only needs to press a short stroke to cut off the first flow channel. In the use scenario of the endoscope, the user needs to hold it for a long time and press frequently to suction. The short pressing stroke can reduce hand fatigue and improve the accuracy and fluency of the operation. There is no specific requirement for the width of the second sealing member 152 and the air channel 163. It is sufficient to connect or cut off the first flow channel when the valve core 130 switches states. And the air channel 163 can be an air hole.

[0052] In some embodiments, the suction channel 162 and the first sealing member 151 are preferably made of elastic material, so that they can achieve closer contact through elastic deformation when deformed, and better isolate the second flow channel. When the operator does not need to suction, the suction pipeline has no suction force, ensuring the safety of the surgical operation. In some examples, the suction channel 162 can be a part of the valve seat 120, that is, the suction channel 162 is not a component provided on the valve seat 120. In this case, the first sealing member 151 can also isolate the second flow channel by abutting the valve seat 120.

[0053] In some embodiments, the valve cap 110 includes an end cap 111 and an elastic member 112, and the elastic member 112 is 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 member 112, and the end cap 111 is used to transmit pressure to the elastic member. When the end cap 111 is pressed, the valve core 130 switches from the first state to the second state, and the elastic member 112 is squeezed by the end cap 111 to produce elastic deformation. When the pressure is removed, the elastic member 112 drives the end cap 111 and the valve core 130 to reset due to the accumulated elastic potential energy, so that the valve core 130 switches from the second state to the first state. The elastic member 112 can achieve the above functions, and its shape can be spring-shaped, ring-shaped, and block-shaped, and its material can be rubber, foam, bellows, shape memory alloy, etc.

[0054] When the elastic member drives the valve core 130 to reset, the elastic member 112 can still have elastic potential energy, so that the valve core 130 is directly or indirectly subjected to a force toward the valve cap 110, thereby driving the first sealing member 151 at the far end of the valve core 130 to contact the suction channel 162. When the first sealing member 151 and the suction channel are made of elastic material, the second flow channel can be better isolated.

[0055] The user can open the second flow channel by pressing the suction valve to suck the object to be sucked out. When suction is not needed, stop pressing, and the suction valve will reset under the action of the elastic member 112, automatically closing the second flow channel to stop suction, without having to press the flow channel again, which is more accurate and labor-saving, and reduces the fatigue caused by long-term holding and pressing operations.

[0056] Furthermore, a wrapping component may be provided outside the end cap 111 and the elastic member 112 to facilitate the operator to press the valve cap 110. The material of the end cap 111 may be relatively hard, so that the feedback is clearer when pressed, so that the operator can more clearly perceive the triggering effect of the button, which is suitable for the scene of precise feedback.

[0057] In some embodiments, the valve housing 140 is connected to the far end of the valve seat 120, and the suction channel 162 extends from the side of the valve housing 140, and the suction channel 162 is at an angle with the axis of the valve core 130, that is, the axis of the suction channel 162 and the axis of the valve core 130 do not coincide. As a result, the suction valve is 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 users to grasp. Compared with 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 expand the flow of the first flow channel, so that the valve core 130 can quickly complete the state switching, reducing the burden on users.

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

[0059] In some embodiments, reference Figure 4 The valve seat 120 is provided with a limit portion 180, the valve housing 140 abuts against the limit portion 180, and the valve housing 140 provides support for the valve seat 120 through the limit portion 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 member 151 and the suction channel 162 that 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 working without suction, causing product use risks.

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

[0061] The embodiment of the present application also provides a short-stroke, labor-saving and simple suction valve, which can effectively reduce the user's fatigue during the operation.

[0062] The suction valve includes a valve cap 210 and a valve seat 220, a suction channel is provided at one end of the valve seat, and a negative pressure channel 261 is provided in the middle of the valve seat 220. The suction valve also includes: a valve core 230, the valve core 230 is movably arranged 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, and a first sealing member 251 is provided on the valve core 230, when the valve core 230 is in the first state, the first sealing member 251 blocks the third flow channel, and when the suction shaft core is switched to the second state, the first sealing member 251 opens the suction channel 262 to connect the third flow channel.

[0063] In one embodiment, the suction valve further comprises 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 through the valve housing 240 and / or the valve cap 210. In this embodiment, the outside air can be sucked through the gap between the valve housing 240 and / or the valve cap 210, so that the valve cavity will not be sucked, thereby protecting the suction valve.

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

[0065] The present invention also provides an endoscope, such as Figure 7 , characterized by containing any of the above-mentioned suction valves. The endoscope includes a suction valve 1000, a handle component 2000, an instrument access part 3000, a communication transmission part 4000 and a mirror tube part 5000. The handle component 2000 is mainly used for holding and as a main body to connect other components. The instrument access part 3000 can be used to provide an insertion channel for other surgical instruments. The communication transmission part 4000 can transmit images to an external terminal. The mirror tube part 5000 contains components such as a snake tube and a lens, which are used to extend into the patient's body for observation and to suck the material to be sucked out, and the suction valve 1000 is connected to the mirror tube part 5000 through a suction pipeline, and the suction can be controlled by pressing the suction valve 1000.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. An endoscope suction valve, characterized in that: The suction valve comprises a valve cap and a valve seat, two ends of the valve seat are respectively provided with an air channel and a suction channel, and a negative pressure channel is provided in the middle of the valve seat; The suction valve further comprises: a valve core, the valve core being movably disposed inside the valve seat to switch between a first state and a second state, a chamber being formed between the valve seat and the valve core, the air channel, the chamber and the negative pressure channel forming a first flow channel, and the suction channel, the chamber and the negative pressure channel forming a second flow channel; A first sealing member and a second sealing member, wherein the first sealing member and the second sealing member are arranged on the valve core; When the valve core is in the first state, the air passage is located at a position below the second sealing member, the first flow passage is connected, and the first sealing member blocks the second flow passage; When the valve core switches to the second state, the second sealing member moves with the valve core to a position below the air channel to block the first flow channel; the first sealing member opens the suction channel to connect the second flow channel.

2. The endoscope suction valve according to claim 1, characterized in that: The second sealing member is an annular member.

3. The endoscope suction valve according to claim 1, characterized in that: The second sealing member is an elastic member.

4. The endoscope suction valve according to claim 1, characterized in that: The second sealing member is an annular elastic member.

5. The endoscope suction valve according to claim 1, characterized in that: The suction valve further includes a valve housing.

6. The endoscope suction valve according to claim 1, characterized in that: The valve cap includes an end cap and an elastic member, wherein the elastic member is arranged between the end cap and the valve seat. When the valve core switches from the first state to the second state, the elastic member is squeezed by the end cap to be deformed. When the valve core switches from the second state to the first state, the elastic member drives the end cap to reset.

7. The endoscope suction valve according to claim 5, characterized in that: A valve housing passage extends from a side of the valve housing, and the valve housing passage forms an angle with the axis of the valve core.

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

9. The endoscope suction valve according to claim 1, characterized in that: The air channel and the suction channel are arranged on one side of the valve seat, and the negative pressure channel is arranged on the other side of the valve seat.

10. The endoscope suction valve according to claim 5, characterized in that: The valve seat is provided with a limiting portion, the valve housing abuts against the limiting portion, and the limiting portion provides support for the valve seat.

11. An endoscope suction valve, characterized in that: The suction valve comprises 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; The suction valve further comprises: A valve core, the valve core is movably arranged 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, and the suction channel, the chamber and the negative pressure channel form a third flow channel; a first sealing member, wherein the first sealing member is disposed on the valve core, When the valve core is in the first state, the first seal blocks the third flow channel, and when the suction shaft core is switched to the second state, the first seal opens the suction channel to connect the third flow channel.

12. The endoscope suction valve according to claim 11, characterized in that: The suction valve further comprises a valve housing. When the valve core is in the first state, the negative pressure channel and the chamber are in communication with the outside through the valve housing and / or the valve cap.

13. The endoscope suction valve according to claim 12, characterized in that: A third sealing member is disposed on the valve core, and the first sealing member and the third sealing member are used to seal the chamber.

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

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