Suction valve, handle and endoscope

Abstract

The application discloses an attraction valve, a handle and an endoscope, and relates to the technical field of medical devices. The attraction valve is used for the endoscope, and the attraction valve comprises a valve body, a valve cap, a valve rod, a pressing piece and a blocking piece. The valve cap is connected with the valve body, and a valve cavity is defined between the valve cap and the valve body. The valve cap is provided with an atmosphere hole which is in communication with the valve cavity. The valve rod is connected with the valve cap and is movably arranged in the valve cavity to switch between a closed position and a suction position. The pressing piece is movably arranged relative to the valve rod. The blocking piece is connected with the pressing piece and moves with the pressing piece to block or move away from the atmosphere hole. A buffer stroke is arranged between the pressing piece and the valve rod. After the pressing piece drives the blocking piece to block the atmosphere hole, the pressing action is transmitted to the valve rod to drive the valve rod to move from the closed position to the suction position. The above scheme can solve the problem that the attraction valve of the related endoscope is prone to leaving residual suction objects at the atmosphere passage.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a suction valve, a handle, and an endoscope. Background Technology

[0002] Endoscopes, as medical devices that can directly access lesions, are increasingly widely used in the diagnosis and treatment of diseases. In some applications, endoscopes can be combined with negative pressure devices to have suction capabilities, allowing the removal of substances from the body, such as fluid accumulation or pathological samples.

[0003] In related technologies, the aspiration operation of an endoscope relies on the suction valve on its handle. During the procedure, the operator presses the suction valve to connect the aspiration channel with the negative pressure channel, allowing the aspirated material to be suctioned. Once the procedure is complete, the operator releases the pressure on the suction valve, connecting the negative pressure channel with the atmospheric channel and closing the aspiration channel, thus cutting off the negative pressure aspiration pathway on the endoscope. However, in practice, aspirated material often remains in the atmospheric channel of the suction valve, posing a high risk of personnel infection and environmental contamination. Summary of the Invention

[0004] This application provides a suction valve, a handle, and an endoscope to at least solve the problem that suctioned material is easily left in the atmospheric passage of the suction valve in related endoscope technologies.

[0005] To solve the above problems, this application adopts the following technical solution: In a first aspect, embodiments of this application provide a suction valve for use with an endoscope. The suction valve includes a valve body, a valve cap, a valve stem, a pressing element, and a sealing element, wherein: The valve cap is connected to the valve body, and the two define a valve cavity. The valve cap has a large air hole communicating with the valve cavity. The valve stem is connected to the valve cap, and the valve stem is movable within the valve cavity to switch between a closed position and a suction position. The pressing member is movably disposed relative to the valve stem, and the sealing member is connected to the pressing member and moves with the pressing member to block or move away from the atmospheric pore; A buffer stroke is provided between the pressing member and the valve stem. The buffer stroke is used to allow the pressing member to drive the sealing member to block the atmospheric pore, and then transmit the pressing action to the valve stem, thereby driving the valve stem to move from the closed position to the suction position. The suction valve is configured such that, after the pressing action is released, the valve stem can be reset and moved to the closed position, and the pressing element can be reset to allow the sealing element to move away from the atmospheric vent.

[0006] Secondly, embodiments of this application provide a handle that includes the suction valve described in the first aspect of embodiments of this application.

[0007] Thirdly, embodiments of this application provide an endoscope, including an insertion part and a handle as described in the second aspect of embodiments of this application, wherein the handle is connected to the insertion part.

[0008] The technical solution adopted in the embodiments of this application can achieve the following beneficial effects: Firstly, in the suction valve disclosed in this application embodiment, by setting a buffer stroke between the pressing member and the valve stem, the valve stem can be driven to move only after the sealing member is moved to block the atmospheric pore (equivalent to the atmospheric channel) in advance. This ensures that the atmospheric channel is always kept closed during the process of the valve stem switching from the closed position to the suction position to open the suction channel. In this way, when the suction valve is opened to suction the sucked object, there is no low-pressure area on the side wall of the valve cap caused by the opening of the atmospheric channel. This can greatly reduce the amount of sucked object that moves to the corresponding position of the atmospheric channel on the side wall of the valve cap, so as to prevent the sucked object from remaining and accumulating in the atmospheric channel.

[0009] Compared to related technologies, the suction valve disclosed in this application can prevent the suction valve from blocking the atmospheric passage after long-term use.

[0010] Secondly, since very little or no suction material remains in the atmospheric passage of the suction valve, the suction material can be prevented from being squeezed out of the atmospheric passage or even released into the atmosphere during the operation of pressing the suction valve, thereby reducing the risk of personnel infection and environmental pollution.

[0011] Third, during the process of the suction valve being pressurized and driving the pressing component to move, the sealing component will move to the position to block the atmospheric vent and always maintain this state. In this case, even if the atmospheric vent on the valve cap has poor sealing performance due to fatigue damage after long-term use, the sealing component will still block the part corresponding to the atmospheric vent on the side wall of the valve cap, thereby ensuring that the sealing at this point is always achieved, so as to avoid the atmospheric passage and the suction passage being opened at the same time. Attached Figure Description

[0012] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0013] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the first suction valve disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the first suction valve disclosed in the embodiments of this application from another perspective; Figure 3 This is a structural schematic diagram of the first suction valve disclosed in the embodiments of this application from another perspective (hidden parts of the structure). Figure 4 This is a cross-sectional view of the first suction valve disclosed in this application when the atmospheric orifice is open. Figure 5 This is a schematic diagram of the valve stem structure disclosed in some embodiments of this application; Figure 6 This is a cross-sectional view of the first suction valve disclosed in this application when the atmospheric orifice is closed and the valve stem is in the closed position; Figure 7 This is a cross-sectional view of the first suction valve disclosed in this application when the atmospheric orifice is closed and the valve stem is in the suction position; Figure 8 This is a cross-sectional view of the second type of suction valve disclosed in the embodiments of this application; Figure 9 This is a cross-sectional view of the third suction valve disclosed in the embodiments of this application; Figure 10 This is a cross-sectional view of the fourth suction valve disclosed in the embodiments of this application, and a partial enlarged view of point A therein; Figure 11 This is a cross-sectional view of the fourth suction valve disclosed in the embodiments of this application from another perspective, and a partial enlarged view of point B; Figure 12 This is a schematic diagram of the fit between the pressing element and the valve stem in the fourth type of suction valve disclosed in the embodiments of this application, and a partial enlarged view of point C. Figure 13 This is a schematic diagram of the valve cap structure of the fourth type of suction valve disclosed in the embodiments of this application; Figure 14 This is a schematic diagram of the structure of the fifth suction valve disclosed in the embodiments of this application.

[0014] Explanation of reference numerals in the attached figures: 100 - Valve body, 110 - Negative pressure channel, 120 - Suction channel, 130 - First positioning part, 140 - Second positioning part, 150 - Third positioning part, 160 - Support part 200-Valve cap, 200a-Atmospheric vent, 200b-Support surface, 200c-Elevated part, 200d-First reinforcing part, 200e-Second reinforcing part, 210-First cap body, 220-Second cap body 300-Valve stem, 310-First pressing head end, 311-First abutting part, 320-First rod body, 321-Flow space, 322-Guide channel, 323-Connecting flow channel, 330-Blocking end, 340-Stop part, 400 - Pressing element, 410 - Second pressing head end, 411 - Second abutting part, 411a - Abutting surface, 420 - Second rod body 500 - Sealing element, 600 - First sealing body, 610 - Connecting hole, 620 - First sealing protrusion, 700 - Second sealing body, 710 - Second sealing protrusion S - Valve chamber, S1 - Buffer space. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] To facilitate understanding of the suction valve, handle, and endoscope provided in the embodiments of this application, the relevant technologies will first be introduced in conjunction with the application scenarios below.

[0017] In relevant endoscopic techniques, the suction valve is located on the endoscope handle, with its valve cap protruding from the handle housing. This allows the operator to press the valve cap to switch the suction valve's state. When the endoscope is connected to an external negative pressure device, the device provides negative pressure suction to the suction valve. In this case, the suction valve is usually configured to be in the closed state, meaning the negative pressure suction acts on the atmosphere and does not aspirate any material (such as sputum or pathological samples like tissue from affected areas). The operator does not need to press the suction valve. However, when aspiration is required, the operator presses the valve cap to switch the suction valve from the closed state to the suction state. At this point, the negative pressure suction acts on the material to be aspirated, facilitating the aspiration operation.

[0018] Note that the operator can continuously aspirate the aspirated material by continuously pressing the valve cap, and release the valve cap to close the suction valve. The operation procedure is relatively simple and is conducive to the operator operating the endoscope by one person and one hand.

[0019] During the use of relevant endoscopes, suctioned material often remains in the atmospheric passage connecting the suction valve to the atmosphere. After prolonged use, this passage can easily become blocked. Furthermore, since the suction valve's switching is achieved through pressure, the suctioned material in the atmospheric passage can be easily expelled when the valve cap is pressed. In particular, the pressure changes caused by the squeezing action can even drive fine particles of the suctioned material into the atmosphere, where they can then dissipate with the airflow. All of these factors increase the risk of infection for personnel and environmental pollution.

[0020] Through research, the inventors discovered that the above problems were mainly caused by the simultaneous opening of the atmospheric channel and the suction channel during the state switching process of the suction valve.

[0021] Taking the process of switching the suction valve from the closed state to the aspiration state as an example, the operator needs to press the valve cap to close the atmospheric passage. However, in the initial stage of pressing, when the valve cap is first pressed, the valve stem has already released the seal on the aspiration passage, opening it. But closing the atmospheric passage requires a process; thus, during the period when the atmospheric passage is closed, the aspiration passage is always open simultaneously with the atmospheric passage. It is evident that the relevant suction valve performs aspiration operations while both the aspiration and atmospheric passages are open simultaneously.

[0022] When a negative pressure is applied to draw in the material through the suction channel, some of the material, in addition to being drawn into the negative pressure channel, will move (e.g., splash) onto the side wall of the valve cap. Especially in the atmospheric channel, airflow is also present due to the negative pressure, which creates a low-pressure area in the atmospheric channel. This further drives the material to move to the corresponding side wall of the valve cap in the atmospheric channel, resulting in the residue and accumulation of the material in the atmospheric channel, thus causing problems such as human infection and environmental pollution.

[0023] In view of this, some embodiments of this application provide a suction valve for an endoscope.

[0024] To make the technical objectives, solutions, and effects of this application clearer, the various embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0025] Please see Figures 1-14 Some embodiments of this application disclose an suction valve including a valve body 100, a valve cap 200, a valve stem 300, a pressing member 400, and a sealing member 500, wherein: The valve body 100 is the main component of the suction valve, serving as the mounting base for most other components, including the valve cap 200. The valve body 100 typically features a positioning structure to ensure reliable assembly when the suction valve is installed within the handle of an endoscope. For example, as... Figure 1 As shown, at least one of a first positioning part 130, a second positioning part 140, and a third positioning part 150 is provided on the outer peripheral surface of the valve body 100. The first positioning part 130 is used to realize the axial positioning assembly of the suction valve, the second positioning part 140 is used to realize the circumferential positioning assembly of the suction valve, and the third positioning part 150 is used to realize the axial and circumferential positioning assembly of the suction valve.

[0026] For ease of understanding, the axial direction of the suction valve can be referenced to the extension direction of the valve stem 300, the circumferential direction of the suction valve can be referenced to the direction surrounding the valve stem 300, and the radial direction of the suction valve can be referenced to the radial direction of the valve stem 300. The above is only a relative illustration of the spatial position characteristics related to the suction valve and is not a limitation on the technical features involved in the embodiments of this application.

[0027] The valve cap 200 is connected to the valve body 100, and the two define a valve cavity S. The valve body 100 has a suction channel 120 and a negative pressure channel 110 communicating with the valve cavity S. During suction operation, the aspirated material is drawn from the front end of the endoscope insertion section and enters the valve cavity S through the instrument channel and suction channel 120 in sequence. The valve cavity S acts as a temporary storage chamber for the aspirated material, and then is aspirated into the negative pressure channel 110. The valve cavity S acts as a transfer channel for the aspirated material to pass through. At the same time, the valve cavity S also provides operating space for the valve stem 300, the pressing element 400, etc., as detailed in [reference needed]. Figure 3 .

[0028] like Figure 2 and Figure 3 As shown, the valve cap 200 has an atmospheric hole 200a that communicates with the valve cavity S. The atmospheric hole 200a serves as the atmospheric passage of the suction valve, and the negative pressure can draw in the external atmosphere through the atmospheric hole 200a.

[0029] The valve stem 300 is movable within the valve cavity S to switch between a closed position and a suction position. It can be understood that the suction valve switches its control state via the valve stem 300, specifically by changing its engagement with the suction channel 120 in response to the operator's pressure. Specifically, when the valve stem 300 is in the closed position, it blocks the suction channel 120, preventing the material being suctioned from entering the valve cavity S. When the valve stem 300 is in the suction position, it releases the blockage, allowing the material being suctioned from the suction channel 120 to smoothly enter the valve cavity S under negative pressure.

[0030] Simultaneously, the valve stem 300 is connected to the valve cap 200. This allows the elastic valve cap 200 to provide a restoring elastic force. Specifically, when the valve stem 300 is in the suction position, upon release of the pressing action, the valve stem 300 can be driven back to the closed position as the valve cap 200 recovers its deformation. Of course, in valve structures, internal moving parts typically utilize a reset structure to achieve state switching, including the pressing component 400 of the suction valve disclosed in this application embodiment. The specific reset principle will be detailed later.

[0031] To reduce the risk of leakage from the gaps between components of the suction valve, for example, such as Figure 3As shown, the suction valve may include a first sealing body 600 disposed within the valve cavity S. The first sealing body 600 is configured to seal against the negative pressure channel 110 and has a communication port for connecting the valve cavity S and the negative pressure channel 110. Specifically, the first sealing body 600 has a communication hole 610 connecting the valve cavity S and the negative pressure channel 110. Further, as... Figure 3 As shown, the first sealing body 600 has a first sealing protrusion 620 near the joint between the valve body 100 and the valve cap 200. The first sealing protrusion 620 abuts against the side wall of the valve body 100 to achieve a seal, thereby enhancing the sealing effect at the joint between the valve body 100 and the valve cap 200.

[0032] For example, such as Figure 3 As shown, the suction valve may include a second sealing body 700 disposed within the valve cavity S, the second sealing body 700 being configured to seal at the connection between the suction channel 120 and the valve cavity S. Further, as... Figure 3 As shown, the second sealing body 700 has a second sealing protrusion 710 that abuts against the side wall of the valve body 100 to enhance the sealing effect between the second sealing body 700 and the valve body 100 and prevent the sucked material in the suction channel 120 from leaking out of the gap between the second sealing body 700 and the valve body 100.

[0033] In the embodiments of this application, the specific materials of the first sealing body 600 and the second sealing body 700 are not limited, and both can be made of rubber, elastic resin, etc.

[0034] In embodiments where the suction valve includes a second sealing body 700, such as Figure 3 As shown, the sealing end 330 of the valve stem 300 can be sealed with the second sealing body 700 to seal the suction channel 120. Of course, in another embodiment, the sealing end 330 of the valve stem 300 can also be directly sealed with the valve body 100; in order to improve the sealing performance, the sealing end 330 of the valve stem 300 can be made of elastic sealing material.

[0035] It is worth noting that the valve stem 300 in this embodiment has a blocking portion that blocks the suction channel 120, and the specific structure of this blocking portion is not limited. Figure 3 The shown sealing end 330 is only one specific implementation structure of the sealing part.

[0036] In the embodiments of this application, the pressing member 400 is movably disposed relative to the valve stem 300, and the sealing member 500 is connected to the pressing member 400 and moves with the pressing member 400 to block or move away from the atmospheric vent 200a. It can be understood that the pressing member 400 is used to receive the operator's pressing operation, and it can move under the pressing action, driving the sealing member 500 to move, thereby changing the spatial position characteristics of the sealing member 500, and thus cooperating with the atmospheric vent 200a to achieve the state switching of the atmospheric vent 200a. Of course, the atmospheric vent 200a should be located on the movement path of the sealing member 500 to facilitate mutual cooperation with the sealing member 500.

[0037] The state of the atmospheric vent 200a (i.e., atmospheric passage) of the suction valve is different when the sealing element 500 is in different positions.

[0038] When the suction valve is closed, the negative pressure device attached to it is used to draw in atmospheric air to prevent excessive suction and damage to the internal structure of the suction valve. Correspondingly, as follows: Figures 2-4 As shown, the sealing element 500 and the atmospheric vent 200a are far apart, meaning the atmospheric vent 200a is in the open state. The atmospheric vent 200a connects the valve chamber S to the outside. Under negative pressure, outside air can be drawn into the valve chamber S through the atmospheric vent 200a and then enter the negative pressure channel 110, specifically... Figure 4 As shown in the diagram, the dashed arrows indicate the suction path for the corresponding external air.

[0039] like Figure 6 As shown, the sealing element 500 blocks the atmospheric vent 200a to cut off the connection between the valve chamber S and the outside, thus achieving a seal on the side wall of the valve cap 200. In this case, the atmospheric passage of the suction valve is closed, and the negative pressure action will no longer draw in outside air. As long as the valve stem 300 is switched to the suction position, the negative pressure action can draw in the object being suctioned through the suction channel 120.

[0040] Meanwhile, in the embodiments of this application, a buffer stroke is provided between the pressing member 400 and the valve stem 300. l Buffer travel l The pressing component 400 drives the sealing component 500 to block the atmospheric vent 200a, and then transmits the pressing action to the valve stem 300, thereby driving the valve stem 300 to move from the closed position to the suction position.

[0041] In conjunction with the foregoing, relative movement can occur between the pressing member 400 and the valve stem 300. That is, under certain circumstances where the pressing member 400 is pressed and moves, the valve stem 300 can generally maintain its original position within the valve cavity S, while the pressing member 400 drives the sealing member 500 from a state away from the atmospheric vent 200a to a state of blocking the atmospheric vent 200a. This process corresponds precisely to the process of the pressing member 400 moving relative to the valve stem 300. For a specific comparison, please refer to the following: Figure 4 and Figure 6 .

[0042] Of course, the pressing member 400 in this embodiment can transmit the pressing action to the valve stem 300 to drive the valve stem 300 from the closed position to the suction position. For details, please refer to the following. Figure 6 and Figure 7 .

[0043] To elaborate, along the pressing direction of the suction valve (which can be roughly referenced) Figure 4 (Hollow arrow in the image), the pressing element 400 has a pressing stroke generated under pressing action, which continues until the valve stem 300 switches to the suction position. Exemplarily, a buffer stroke... l The stroke of the pressing element 400 can be roughly considered as the first part of its pressing stroke, while the stroke in which the pressing element 400 moves the valve stem 300 can be roughly considered as the second part of its pressing stroke. In conjunction with the above, the buffer stroke between the pressing element 400 and the valve stem 300... l This pertains to the movement of the pressing element 400 relative to the valve stem 300, meaning it occurs during the buffer stroke. l Inside, the pressing component 400 can drive the sealing component 500 to move until the sealing component 500 blocks the atmospheric vent 200a. At this time, the atmospheric passage of the suction valve is closed.

[0044] It can be seen that the buffer stroke l In reality, the pressing element 400 transmits the pressing action to the valve stem 300 after the atmospheric passage is closed, thus driving the valve stem 300 to move. Therefore, in the initial stage when the valve stem 300 moves to release the blockage of the suction passage 120, the atmospheric passage is already ensured to be in a closed state. Thus, during the entire movement of the valve stem 300 from the closed position to the suction position, neither the atmospheric passage nor the suction passage 120 of the suction valve will open simultaneously. This can fundamentally solve the technical problem of residual sucked material in the atmospheric passage that exists in the aforementioned related suction valves.

[0045] It is worth noting that, in the embodiments of this application, during the buffer stroke... l Subsequently, the pressing element 400 transmits the pressing action to the valve stem 300 in multiple directions. For example, as... Figure 4As shown, the valve cap 200 has a support surface 200b, which supports the second pressing head end 410 of the pressing member 400 and buffers the stroke when the sealing member 500 blocks the atmospheric vent 200a. l The distance between the second pressing head end 410 of the pressing member 400 and the support surface 200b is the distance between them. In this implementation, during the pressure application process of the suction valve, the pressing member 400 moves until its second pressing head end 410 abuts against the support surface 200b of the valve cap 200. This allows the pressed force to be transmitted to the valve stem 300 through the valve cap 200, thereby driving the valve stem 300 to move and open the suction channel 120. In other implementations, the pressing member 400 can transmit the pressing force by having its second pressing head end 410 abut against the first pressing head end 310 of the valve stem 300.

[0046] With the suction valve open, i.e., when valve stem 300 is in the suction position, the negative pressure provided by the negative pressure device is used to suction the object being sucked up. Please refer to... Figure 7 , Figure 7 The suction valve shown is in the open state. Since the sealing element 500 blocks the atmospheric vent 200a, the atmospheric passage of the suction valve is closed. Therefore, the negative pressure will not draw air from outside the suction valve. Furthermore, at this time, the valve stem 300 is in the suction position, meaning the suction passage 120 of the suction valve is open. The material to be suctioned from the body enters the valve chamber S sequentially through the instrument passage of the endoscope insertion section and the suction passage 120, and is then drawn into the negative pressure passage 110. For example... Figure 7 As shown in the figure, the dashed arrows indicate the suction path of the corresponding sample.

[0047] like Figure 3 and Figure 7 As shown, in order to facilitate the smooth entry of the material being sucked into the valve cavity S in the suction channel 120, the main body of the valve stem 300 (which may refer to the first stem 320 mentioned later) may be provided with a through flow space 321. When the valve stem 300 is in the suction position, the flow space 321 can increase the flow rate of the material being sucked, thereby improving the suction efficiency of the material being sucked.

[0048] like Figure 3 and Figure 7 As shown, in order to prevent the suction valve from being pressed excessively, the outer peripheral surface of the valve stem 300 is provided with a stop portion 340, and the valve body 100 is provided with a support portion 160 that matches the stop portion 340. After the valve stem 300 moves into position, that is, into the suction position, the stop portion 340 and the support portion 160 are engaged in the upper limit of the pressing direction.

[0049] The suction valve is configured such that, after the pressing action is released, the valve stem 300 can reset and move to the closed position, and the pressing element 400 can reset, allowing the sealing element 500 to move away from the atmospheric vent 200a. It can be understood that when it is necessary to close the suction valve, the pressing action on the suction valve can be removed, and the valve stem 300 can reset and switch to the closed position under the action of the valve cap 200, thus closing the suction channel 120; the pressing element 400 can also reset, thereby releasing the restriction on the sealing element 500, that is, no longer restricting the sealing element 500 from being in the position blocking the atmospheric vent 200a, so that the sealing element 500 can reset to a position away from the atmospheric vent 200a, opening the atmospheric channel of the suction valve. In this way, the negative pressure can again draw in external air through the atmospheric vent 200a, which can be referred to in sequence. Figure 7 and Figure 4 .

[0050] Based on the above analysis, it can be seen that the suction valve disclosed in this application can drive the valve stem 300 to move only after the sealing member 500 is moved to block the atmospheric vent 200a in advance. This ensures that the atmospheric vent is always kept closed during the process of the valve stem 300 switching from the closed position to the suction position to open the suction channel 120. In this way, when the suction valve is opened to suction the object being sucked, there is no low-pressure area on the side wall of the valve cap 200 due to the opening of the atmospheric vent. This can greatly reduce the amount of object being sucked that moves to the corresponding position of the atmospheric vent on the side wall of the valve cap 200, so as to prevent the object being sucked from remaining or accumulating in the atmospheric vent.

[0051] Compared to related technologies, the suction valve disclosed in this application can effectively prevent the sucked material from remaining or accumulating in the atmospheric passage, thereby avoiding the suction valve from blocking the atmospheric passage after long-term use.

[0052] Secondly, since very little or no suction material remains in the atmospheric passage of the suction valve, the suction material can be prevented from being squeezed out of the atmospheric passage or even escaped into the atmosphere during the operation of pressing the suction valve, thereby reducing the risk of personnel infection and environmental pollution.

[0053] Furthermore, the existing technology closes the atmospheric passage (i.e., atmospheric hole 200a) by squeezing the valve cap 200. This results in significant deformation of the corresponding atmospheric passage and its surrounding area on the valve cap 200 each time the atmospheric passage is closed. After long-term use, the area corresponding to the atmospheric passage on the valve cap 200 is prone to fatigue damage, leading to poor sealing performance when the atmospheric passage is closed, making it difficult to achieve an effective seal. In contrast, in the embodiment of this application, during the process of the suction valve being pressurized and driving the pressing member 400 to move, the sealing member 500 moves to the position that blocks the atmospheric hole 200a and maintains this state. In this case, even if the atmospheric hole 200a on the valve cap 200 has poor sealing performance due to fatigue damage after long-term use, the sealing member 500 still blocks the area corresponding to the atmospheric hole 200a on the side wall of the valve cap 200, thereby ensuring that a seal is always achieved at this point, preventing the atmospheric passage and the suction passage 120 from opening simultaneously.

[0054] Regarding the specific sealing method of the sealing component 500 for the atmospheric pore 200a, the embodiments of this application do not impose any restrictions on it.

[0055] For example, such as Figure 4 and Figure 6 As shown, the sealing member 500 plugs into the atmospheric port 200a to seal the atmospheric port 200a. Thus, during the process of the suction valve being pressurized and the valve cap 200 deforming, the sealing member 500 can provide support for the part on the side wall of the valve cap 200 corresponding to the atmospheric port 200a within the atmospheric port 200a. Even if this part is damaged due to fatigue, it will always be opened by the sealing member 500 to maintain the sealing effect, thereby improving the reliability of sealing the side wall of the valve cap 200.

[0056] For example, the sealing member 500 can block the atmospheric vent 200a by correspondingly blocking it. Of course, this implementation requires ensuring that the sealing member 500 abuts against the portion of the valve cap 200 sidewall corresponding to the atmospheric vent 200a to achieve a seal. In this embodiment, the sealing member 500 is not inserted into the atmospheric vent 200a, which can reduce damage to the portion of the valve cap 200 sidewall corresponding to the atmospheric vent 200a.

[0057] In the embodiments of this application, the cooperation relationship between the pressing member 400 and the sealing member 500 can be varied. For example, the pressing member 400 and the sealing member 500 can achieve telescopic movement by changing the moving direction of the sealing member 500 through an inclined guide mechanism, or the sealing member 500 can achieve rotational movement through a lever mechanism. Furthermore, the embodiments of this application do not limit the specific distribution position of the atmospheric vent 200a on the valve cap 200. For example, the atmospheric vent 200a can be opened on the sidewall of the valve cap 200 corresponding to the circumferential distribution of the suction valve.

[0058] In other embodiments, such as Figure 3 As shown, the sealing member 500 is fixedly connected to the pressing member 400 so that the sealing member 500 moves along the pressing direction of the suction valve with the pressing member 400.

[0059] Understandably, with this layout, since the sealing element 500 is fixedly connected to the pressing element 400, the movement characteristics of the sealing element 500 will be completely consistent with those of the pressing element 400. In other words, the sealing element 500 will also extend and retract along with the pressing element 400 in the pressing direction. Compared to other methods, this eliminates the need for a transmission mechanism between the pressing element 400 and the sealing element 500, reducing costs while also improving the action response efficiency of the sealing element 500.

[0060] Furthermore, such as Figure 3 and Figure 4 As shown, the atmospheric vent 200a can be located on the sidewall of the valve cap 200, which is radially distributed along the suction valve. It should be understood that the sidewalls of the valve cap 200 distributed radially along the suction valve are used to connect with the valve stem 300, and generally have greater rigidity than the sidewalls distributed circumferentially along the suction valve to ensure reliable connection with the valve stem 300.

[0061] In this embodiment, since the atmospheric vent 200a is located on the side wall of the valve cap 200 distributed radially along the suction valve, the side wall of the valve cap 200 near the atmospheric vent 200a has high rigidity. During the process of pressing the suction valve, the side wall of this part of the valve cap 200 has a high resistance to elastic deformation. Even if the valve cap 200 as a whole is deformed by pressure, it is difficult for the side wall of the valve cap 200 near the atmospheric vent 200a to deform or deform only slightly. In this way, it is possible to avoid leakage between the side wall of the valve cap 200 near the atmospheric vent 200a and the sealing component 500 due to pulling, thereby ensuring the sealing performance of the valve cap 200.

[0062] It is worth noting that because the sidewall of the valve cap 200 near the atmospheric vent 200a is difficult to deform or has a small deformation range, the risk of fatigue damage to this part of the sidewall is low. In other words, the atmospheric vent 200a formed by this part of the sidewall can also maintain its original shape, thus better fitting with the sealing component 500 and ensuring that the valve cap 200 has better sealing performance. Especially in the embodiment where the sealing component 500 and the atmospheric vent 200a are inserted together, if the risk of fatigue damage to the sidewall of the valve cap 200 near the atmospheric vent 200a is low, it will be easier for it to maintain its high elasticity. When the sealing component 500 is inserted into the atmospheric vent 200a, the sidewall of the valve cap 200 near the atmospheric vent 200a will tightly press against the sealing component 500 to achieve a reliable seal.

[0063] For example, the sealing component 500 and the pressing component 400 can be integrally formed, which can improve the connection reliability between the two and simplify the assembly process.

[0064] In a further embodiment, in the pressing member 400 and the valve stem 300, one is inserted into the other along its movable direction. This utilizes the internal accommodating space of the pressing member 400 or the valve stem 300, improving structural compactness and facilitating the structural layout of the suction valve. Specifically, as... Figure 3 and Figure 4 As shown, the pressing member 400 is inserted into the guide channel 322 of the valve stem 300 along its moving direction.

[0065] It is understandable that the plug-in mating relationship can provide guidance for the pressing element 400 or the valve stem 300. For example... Figure 3 and Figure 4 As shown, the second rod 420 of the pressing member 400 is inserted into the guide channel 322. The wall of the guide channel 322 can provide a certain radial limiting constraint on the pressing member 400, preventing the pressing member 400 from radially deviating, and ensuring that the pressing force on the valve stem 300 is distributed along a preset direction. Note that in this embodiment, the valve stem 300 serves as the mounting base for the pressing member 400, but this embodiment does not impose specific limitations on this. For example, the valve body 100 can be used as the mounting base for the pressing member 400.

[0066] Of course, the embodiments of this application do not limit the specific mating relationship between the pressing member 400 and the valve stem 300. Exemplarily, the pressing member 400 and the valve stem 300 are separately disposed, requiring only that the pressing member 400 has a buffer stroke. l Once moved, it should be able to contact the valve stem 300 and transmit the pressing action.

[0067] In a further embodiment, such as Figure 10 As shown, the valve cap 200 has a support surface 200b, which supports the second pressing head end 410 of the pressing member 400 when the sealing member 500 blocks the atmospheric hole 200a. The valve cap 200 has a raised portion 200c provided on the support surface 200b. The raised portion 200c and the atmospheric hole 200a are located on the same radial direction of the suction valve and are arranged opposite to each other in the circumferential direction of the suction valve.

[0068] Understandable. Figure 6The diagram illustrates the structural fit between the sealing element 500 and the atmospheric vent 200a, which is in a closed state. During the process of sealing the atmospheric vent 200a, the sealing element 500 is subjected to a reverse force exerted by the side wall of the valve cap 200 near the atmospheric vent 200a. For example, during the insertion of the sealing element 500 into the atmospheric vent 200a, the wall of the atmospheric vent 200a will compress the sealing element 500, thus hindering the insertion action of the sealing element 500. This will cause the side of the pressing element 400 near the sealing element 500 to be pushed up. During the continuous pressing of the suction valve, the pressing element 400 will tilt to the side away from the sealing element 500. Therefore, there will be a large interference resistance at the insertion part between the pressing element 400 and the valve stem 300, which is not conducive to the pressing element 400 successfully performing the pressing action.

[0069] In this embodiment, a raised portion 200c is provided on the support surface 200b. By setting the raised portion 200c and the atmospheric vent 200a in the same radial direction of the suction valve and opposite to each other in the circumferential direction of the suction valve, and since the atmospheric vent 200a and the sealing member 500 are correspondingly set in the circumferential direction of the suction valve, the raised portion 200c and the sealing member 500 are distributed opposite to each other in the circumferential direction of the suction valve.

[0070] In the specific operation process, the raised part 200c can contact the second pressing head end 410 of the pressing member 400 before the lower support surface 200b, thereby raising the side of the pressing member 400 away from the sealing member 500, improving the tilting situation caused by the pressing member 400 being raised by the sealing member 500, and playing a correcting role for the pressing member 400 in the pressing direction. This avoids large interference resistance at the insertion part between the pressing member 400 and the valve stem 300, which is conducive to the pressing member 400 achieving a smooth pressing action.

[0071] In another embodiment, such as Figures 10-12 As shown, the first pressing head end 310 of the valve stem 300 has a first abutting portion 311, and the second pressing head end 410 of the pressing member 400 has a second abutting portion 411. Along the pressing direction of the suction valve, the first abutting portion 311 and the second abutting portion 411 are correspondingly arranged, and at least one of them is provided with an abutting surface 411a that is inclined relative to the pressing direction of the suction valve, so as to apply a balancing force to the pressing member 400 when the first abutting portion 311 and the second abutting portion 411 abut against each other. The balancing force is used to drive the pressing member 400 to deflect toward the side closer to the sealing member 500.

[0072] Understandably, with this arrangement, during the pressing of the suction valve, as the pressing member 400 moves relative to the valve stem 300, the second pressing head end 410 and the first pressing head end 310 approach each other, causing the first abutting portion 311 and the second abutting portion 411 to abut against each other and generate a pressing effect. Simultaneously, by providing an abutting surface 411a on at least one of the first abutting portion 311 and the second abutting portion 411, the direction of the pressing action between the first abutting portion 311 and the second abutting portion 411 can be changed based on the orientation of the abutting surface 411a, thereby changing the direction of the pressing action of the valve stem 300 on the pressing member 400. Specifically, in this embodiment, the pressing action of the valve stem 300 on the pressing member 400 is adaptively adjusted by the abutting surface 411a, so that this pressing action acts as a balancing force, driving the pressing member 400 to deflect towards the side closer to the sealing member 500, thereby preventing the pressing member 400 from tilting during the pressing of the suction valve.

[0073] Specifically, such as Figure 12 As shown, when the first abutting part 311 and the second abutting part 411 abut against each other, the abutting parts between them generate an abutting force acting on the pressing member 400 through the abutting surface 411a. F The resistance F Drive the pressing element 400 to deflect in the direction a The deflection is achieved, thereby balancing the pressing member 400, which is raised due to the sealing member 500, and preventing the pressing member 400 from tilting during the pressing of the suction valve.

[0074] The specific structure of the first abutting part 311 and the second abutting part 411 is not limited in the embodiments of this application. For example, both the first abutting part 311 and the second abutting part 411 are abutting protrusions.

[0075] For example, in the first abutting portion 311 and the second abutting portion 411, one is an abutting arm and the other is an abutting groove, specifically, as shown in the example. Figure 11 and Figure 12 As shown, the first abutting part 311 is an abutting groove, and the second abutting part 411 is an abutting arm. Of course, the structural types of the two abutting parts can be interchanged. It is worth noting that the abutting groove can achieve abutting engagement with the abutting arm using its groove wall or groove edge. Furthermore, the abutting surface 411a can be provided at the groove wall or groove edge of the abutting groove. Specifically, as... Figure 12 As shown, the abutting surface 411a is provided on the abutting arm. Exemplarily, the abutting surface 411a is a planar surface or an arc surface.

[0076] Meanwhile, when the sealing element 500 seals the vent 200a, the abutment arm extends at least partially into the abutment groove. Thus, the space within the abutment groove can serve as a receiving space for the abutment arm, which is equivalent to utilizing the internal space of the first pressing head end 310 of the valve stem 300 as the stroke space for the abutment arm, improving space utilization and structural compactness. Furthermore, the abutment arm is easier to elastically deform, facilitating the transmission of the abutment force for overturning to the pressing element 400 through its stroke. F .

[0077] In another embodiment, such as Figure 14 As shown, the suction valve includes multiple sealing elements 500, which are evenly distributed along the circumference of the pressing element 400. Multiple atmospheric pores 200a are provided, and each corresponds to one of the sealing elements 500.

[0078] With this arrangement, during the insertion and engagement of the sealing component 500 and the atmospheric vent 200a, the portion of the pressing component 400 corresponding to each sealing component 500 will be lifted. This avoids the pressing component 400 being lifted on one side and tilting. Since multiple sealing components 500 are evenly distributed along the circumference of the pressing component 400, the pushing force received by the pressing component 400 is also evenly distributed along its circumference. This helps the pressing component 400 maintain balance during the movement of the suction valve under pressure, thus facilitating the pressing component 400 to smoothly perform the pressing action.

[0079] In some embodiments of this application, when the sealing member 500 blocks the atmospheric vent 200a, the sealing member 500 is at least partially inserted into the atmospheric vent 200a; the cross-sectional size of the atmospheric vent 200a gradually decreases along the axial direction of the atmospheric vent 200a and away from its insertion end, and / or, the cross-sectional size of the sealing member 500 gradually increases along the axial direction of the sealing member 500 and away from its insertion end. It should be noted that the insertion end of the atmospheric vent 200a can refer to the end into which the sealing member 500 is first inserted, and the insertion end of the sealing member 500 can refer to the end into which the atmospheric vent 200a is first inserted.

[0080] It is understandable that the atmospheric pore 200a can have a gradually changing size along the insertion direction, as can be seen in [reference needed]. Figure 4 For example, specifically, the axial direction of the atmospheric vent 200a, away from its insertion end, is roughly the same as the direction of movement of the sealing member 500. In this direction, the cross-sectional size of the atmospheric vent 200a gradually decreases. That is to say, in this direction, the atmospheric vent 200a has a gradually narrowing characteristic. In this way, during the process of the sealing member 500 being inserted into the atmospheric vent 200a, the outer peripheral surface of the sealing member 500 abuts against the wall of the atmospheric vent 200a. The two are pressed against each other due to interference, and through a certain deformation, they cooperate with a larger contact area, thereby gradually achieving a tight fit and achieving a better sealing effect.

[0081] The sealing element 500 can have a gradually changing size along the insertion direction. Similar to the atmospheric vent 200a, the sealing element 500 has its cross-sectional size gradually increasing along its axial direction and away from its insertion end. This makes the overall size of the sealing element 500 gradually thicken in this direction. Then, during the process of the sealing element 500 and the atmospheric vent 200a being inserted towards each other, the outer peripheral surface of the sealing element 500 abuts against the wall of the atmospheric vent 200a. Due to interference, the two press against each other, thereby gradually achieving a tight fit and a better sealing effect.

[0082] In addition, based on the gradual size change of the atmospheric vent 200a and / or the sealing member 500 in this embodiment, the size of the open portion of the atmospheric vent 200a near its insertion end can be set to be larger, or the size of the insertion end of the sealing member 500 can be set to be smaller. This makes it easier for the sealing member 500 and the atmospheric vent 200a to be inserted in the initial stage of insertion, thereby improving the ease of operation.

[0083] Please see Figure 13 In some embodiments of this application, the sidewall of the valve cap 200 may have a first reinforcing portion 200d corresponding to the atmospheric vent 200a. The first reinforcing portion 200d is arranged around the atmospheric vent 200a in the circumferential direction, and the first reinforcing portion 200d is located on the side of the atmospheric vent 200a away from its insertion end.

[0084] It is understandable that, as mentioned above, during the pressing of the suction valve, the valve cap 200 will deform due to pressure. The wrinkles caused by the deformation may extend to the atmospheric vent 200a. Thus, even if the sealing component 500 blocks the atmospheric vent 200a, the valve cap 200 sidewall at the atmospheric vent 200a may lose its reliable fit with the sealing component 500 due to the wrinkles and deformation, making it difficult to seal.

[0085] In this embodiment, a first reinforcing part 200d is provided circumferentially around the atmospheric aperture 200a. The first reinforcing part 200d can provide structural reinforcement around the atmospheric aperture 200a, which is equivalent to forming a barrier in the circumferential direction of the atmospheric aperture 200a to cope with the deformation of the valve cap 200. This can reduce the deformation range of the valve cap 200 sidewall at the atmospheric aperture 200a or even prevent the valve cap 200 sidewall at this part from deforming. This ensures the reliability of the fit between the sealing member 500 and the valve cap 200 sidewall at the atmospheric aperture 200a and optimizes the sealing effect of the sealing member 500 on the valve cap 200.

[0086] In addition, since the first reinforcing part 200d is arranged in a closed loop around the perimeter, the cross-sectional area of ​​the first reinforcing part 200d will be further increased to improve the rigidity of the valve cap 200 sidewall at the first reinforcing part 200d and the atmospheric hole 200a, thereby further mitigating the impact of valve cap 200 deformation.

[0087] Please see Figure 13 In some embodiments of this application, the sidewall of the valve cap 200 may have a second reinforcing portion 200e disposed at least partially circumferentially along the valve cap 200, the atmospheric vent 200a being located on the extension path of the second reinforcing portion 200e, and the second reinforcing portion 200e being located on the side of the atmospheric vent 200a opposite to its insertion end.

[0088] It is understood that in this embodiment, the second reinforcing part 200e extends through the location of the atmospheric vent 200a in its extension direction. The second reinforcing part 200e can provide structural reinforcement to the sidewall of the valve cap 200 at the atmospheric vent 200a. At the same time, since the second reinforcing part 200e is distributed circumferentially along the valve cap 200, the extended area of ​​the second reinforcing part 200e becomes part of the reinforcing structure. This increases the cross-sectional area of ​​the reinforcing structure, thereby improving the stiffness of the second reinforcing part 200e and its surrounding area. This alleviates the impact of valve cap 200 deformation on the sidewall of the valve cap 200 at the atmospheric vent 200a, thereby ensuring the reliability of the fit between the sealing member 500 and the sidewall of the valve cap 200 at the atmospheric vent 200a, and optimizing the sealing effect of the sealing member 500 on the valve cap 200.

[0089] Note that in the above embodiments, the reinforcing structure (first reinforcing part 200d and / or second reinforcing part 200e) is provided on the side of the atmospheric vent 200a away from its insertion end, in order to avoid interference with the sealing member 500 or even hinder the sealing effect of the sealing member 500 if it is provided on the side of the atmospheric vent 200a insertion end.

[0090] Furthermore, the first reinforcing part 200d and the second reinforcing part 200e can be connected to further enhance the overall strength and rigidity, thereby further reducing the impact of valve cap 200 deformation on the sidewall of valve cap 200 at atmospheric port 200a.

[0091] As mentioned above, the suction valve disclosed in this application requires the pressing member 400 to move a buffer stroke first during the pressing process. l The corresponding distance, and during this process, it is necessary to ensure that the valve stem 300 does not move significantly until the sealing member 500 blocks the atmospheric vent 200a, and then the pressing action is transmitted to the valve stem 300 to open the suction channel 120. In the embodiments of this application, a buffer stroke is configured. l There are various methods, and this application does not impose specific limitations on them.

[0092] For example, the suction valve includes a first reset structure for resetting the valve stem 300 and a second reset structure for resetting the pressing member 400, wherein the stiffness of the first reset structure is greater than that of the second reset structure.

[0093] The first reset structure can be the valve cap 200 or a portion thereof (e.g., the second cap 220 described later). For example, the second reset structure can be the first cap 210 or an elastic reset member described later.

[0094] It is understood that stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to force, and is a characterization of the ease with which a material or structure undergoes elastic deformation. In this embodiment, the stiffness of the first reset structure is greater than that of the second elastic element. That is to say, the first reset structure has a stronger ability to resist elastic deformation and is less likely to deform when subjected to force, while the second reset structure has a weaker ability to resist elastic deformation and is more likely to deform when subjected to force.

[0095] In this configuration, during the initial stage of the suction valve press, a relatively small pressing action is sufficient to move the pressing member 400, thereby causing the sealing member 500 to move to a position where it blocks the atmospheric vent 200a. During this process, because the pressing action has not yet reached the elastic deformation limit of the first reset structure, it ensures that the valve stem 300 will not be moved. In a more advanced configuration, after the pressing member 400 has blocked the atmospheric vent 200a, the pressing action can be increased further to move the valve stem 300 and release the blockage of the suction channel 120.

[0096] In the above analysis, the distance the pressing element 400 moves before the valve stem 300 moves is the buffer stroke in the above embodiment. l .

[0097] It is worth noting that during the process of releasing the pressing action and closing the suction valve, the first reset structure has greater rigidity, which drives the valve stem 300 to reset rapidly and close the suction channel 120 in the first instant. At the same time, because the second reset structure has less rigidity, the reset efficiency of the pressing member 400 is lower than that of the valve stem 300. Therefore, the sealing member 500 will not separate from the atmospheric vent 200a in the first instant. In this way, it can be ensured that after the suction channel 120 is closed, the sealing member 500 separates from the atmospheric vent 200a and opens the atmospheric channel of the suction valve, thereby avoiding the simultaneous opening of the suction channel 120 and the atmospheric channel during the closing of the suction valve.

[0098] As can be seen, in the above embodiments, a buffer stroke is formed between the pressing member 400 and the valve stem 300 based on the stiffness difference between the first reset structure and the second reset mechanism. l .

[0099] In another configuration buffered process l In this embodiment, the pressing member 400 and the valve stem 300 can be separately configured to form a buffer stroke. l The pressing component 400 drives the sealing component 500 to seal the atmospheric pore 200a, and then abuts against the valve stem 300, transmitting the pressing action to the valve stem 300.

[0100] In the embodiments of this application, the types of the first reset structure and the second reset structure can be various, and the embodiments of this application do not impose specific limitations on them.

[0101] For example, such as Figure 3 and Figure 4 As shown, the valve cap 200 includes a first cap body 210 and a second cap body 220 arranged sequentially along the pressing direction of the suction valve. The first cap body 210 is connected to the pressing member 400 to apply an elastic force for resetting to the pressing member 400 after it is pressed and moved. The second cap body 220 is connected to the valve stem 300 to apply an elastic force for resetting to the valve stem 300 after it is pressed and moved.

[0102] With this arrangement, when the valve cap 200 is not pressed, the first cap body 210 supports the pressing member 400, so that there is a buffer stroke between the pressing member 400 and the valve stem 300. l In other words, the first cap 210 is the aforementioned second reset structure; the second cap 220 supports the valve stem 300 so that the valve stem 300 blocks the suction channel 120, meaning the second cap 220 is the aforementioned first reset structure. Compared to the second cap 220, the first cap 210 is located closer to the pressing side of the suction valve, so that when the suction valve is pressed, it can apply a pressing action to the pressing member 400. In this embodiment, the first reset structure and the second reset structure are essentially integrated into a single structure, the valve cap 200, reducing the number of components and simplifying the overall structure of the suction valve.

[0103] Of course, the embodiments of this application do not limit the specific assembly relationship between the valve cap 200, the pressing member 400, and the valve stem 300.

[0104] Exemplarily, the suction valve may further include an elastic reset member connected to the pressing member 400 to apply an elastic force for reset to the pressing member 400 after it has been pressed and moved; the valve cap 200 is used to apply an elastic force for reset to the valve stem 300 after it has been pressed and moved. In this embodiment, the valve cap 200 is a first reset structure, and the elastic reset member is a second reset structure. Exemplarily, as... Figure 8 As shown, the elastic reset member can be disposed within the valve stem 300. For example, the elastic reset member is disposed within the guide channel 322.

[0105] When the valve cap 200 includes a first cap body 210 and a second cap body 220, the first cap body 210 defines a buffer space S1 between the first pressing head end 310 of the valve stem 300 and the second pressing head end 410 of the pressing member 400. The buffer space S1 is related to the buffer stroke. l Related.

[0106] like Figure 9 As shown, in some embodiments of this application, the occluder 500 is located outside the buffer space S1. With this arrangement, the occluder 500 is exposed outside the suction valve, which facilitates observation by the operator. This allows for timely monitoring of the fit between the occluder 500 and the large air vent 200a during operation, particularly determining whether the occluder 500 blocks the large air vent 200a, thus enabling the operator to make adaptive adjustments.

[0107] like Figure 3 As shown, in some embodiments of this application, the sealing member 500 is housed in the buffer space S1. This arrangement reduces the exposure of internal components of the suction valve, improving the overall aesthetics of the suction valve; at the same time, this arrangement appropriately increases the overall size of the first cap, which is beneficial to improving the strength and rigidity of the first cap 210, thereby optimizing the operating feel.

[0108] In embodiments where the valve cap 200 includes a first cap body 210 and a second cap body 220, if the atmospheric vent 200a can communicate with the buffer space S1 of the valve cavity S, and in order for external air to be smoothly drawn to the negative pressure channel 110, a connecting flow channel 323 connecting the buffer space S1 and the main chamber of the valve cavity S can be provided. For example, as... Figure 4 and Figure 5 As shown, the connecting channel 323 is provided on the valve stem 300. Of course, the connecting channel 323 can also be provided in the side wall of the valve cap 200.

[0109] Some embodiments of this application also provide a handle that includes the suction valve mentioned in any of the foregoing solutions, thus giving the handle the beneficial effects of the aforementioned suction valve, which will not be described in detail here.

[0110] Some embodiments of this application also provide an endoscope including an insertion portion and a handle as mentioned in any of the foregoing solutions, the handle being connected to the insertion portion. The endoscope of this embodiment possesses the beneficial effects of the aforementioned handle, which will not be elaborated further here.

[0111] In this application, the endoscope referred to in the embodiments may be a bronchoscope, pyeloscope, esophagoscopy, gastroscopy, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. The embodiments of this application do not specifically limit the type of endoscope.

[0112] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be described in detail here.

[0113] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A suction valve for an endoscope, characterized in that, The suction valve includes a valve body, a valve cap, a valve stem, a pressing element, and a sealing element, wherein: The valve cap is connected to the valve body, and the two define a valve cavity. The valve cap has a large air hole communicating with the valve cavity. The valve stem is connected to the valve cap, and the valve stem is movable within the valve cavity to switch between a closed position and a suction position. The pressing member is movably disposed relative to the valve stem, and one of the pressing member (400) and the valve stem (300) is inserted into the other along its movable direction; the sealing member is connected to the pressing member and moves with the pressing member to block or move away from the atmospheric pore; A buffer stroke is provided between the pressing member and the valve stem. The buffer stroke is used to allow the pressing member to drive the sealing member to block the atmospheric pore, and then transmit the pressing action to the valve stem, thereby driving the valve stem to move from the closed position to the suction position. The suction valve is configured such that, after the pressing action is released, the valve stem can be reset and moved to the closed position, and the pressing element can be reset to allow the sealing element to move away from the atmospheric vent.

2. The suction valve according to claim 1, characterized in that, The sealing member is fixedly connected to the pressing member so that the sealing member moves along the pressing direction of the suction valve with the pressing member.

3. The suction valve according to claim 2, characterized in that, In the pressing member and the valve stem, one is inserted into the other along its movable direction; wherein: The valve cap has a support surface for supporting the second pressing head end of the pressing member when the sealing member blocks the atmospheric vent. The valve cap has a raised portion provided on the support surface. The raised portion and the atmospheric vent are located in the same radial direction of the suction valve and are arranged opposite to each other in the circumferential direction of the suction valve. And / or, the first pressing head end of the valve stem has a first abutting portion, and the second pressing head end of the pressing member has a second abutting portion. Along the pressing direction of the suction valve, the first abutting portion and the second abutting portion are correspondingly arranged, and at least one of them has an abutting surface that is inclined relative to the pressing direction of the suction valve, so as to apply a balancing force to the pressing member when the first abutting portion and the second abutting portion abut against each other. The balancing force is used to drive the pressing member to deflect toward the side closer to the sealing member. And / or, the suction valve includes a plurality of the sealing elements, the plurality of the sealing elements being evenly distributed along the circumference of the pressing element, and the atmospheric vents being provided in a plurality of manner, each corresponding to one of the sealing elements.

4. The suction valve according to claim 3, characterized in that, In the first abutting part and the second abutting part, one is an abutting arm and the other is an abutting groove; when the sealing member blocks the atmospheric pore, the abutting arm extends at least partially into the abutting groove.

5. The suction valve according to any one of claims 1 to 4, characterized in that, When the sealing member blocks the atmospheric vent, the sealing member is at least partially inserted into the atmospheric vent; the cross-sectional size of the atmospheric vent gradually decreases along the axial direction of the atmospheric vent and away from its insertion end, and / or the cross-sectional size of the sealing member gradually increases along the axial direction of the sealing member and away from its insertion end.

6. The suction valve according to any one of claims 1 to 4, characterized in that, The valve cap has a first reinforcing part on its side wall corresponding to the atmospheric vent. The first reinforcing part is arranged around the atmospheric vent in the circumferential direction and is located on the side of the atmospheric vent away from its insertion end. And / or, the sidewall of the valve cap has a second reinforcement disposed at least partially circumferentially along the valve cap, the atmospheric vent is located on the extension path of the second reinforcement, and the second reinforcement is located on the side of the atmospheric vent opposite to its insertion end; And / or, the suction valve includes a first reset structure for resetting the valve stem and a second reset structure for resetting the pressing element, wherein the stiffness of the first reset structure is greater than the stiffness of the second reset structure.

7. The suction valve according to any one of claims 1 to 4, characterized in that, The valve cap includes a first cap body and a second cap body arranged sequentially along the pressing direction of the suction valve. The first cap body is connected to the pressing member to apply an elastic force for resetting the pressing member after it is pressed and moved. The second cap body is connected to the valve stem to apply an elastic force for resetting the valve stem after it is pressed and moved. Alternatively, the suction valve may further include an elastic reset member connected to the pressing member to apply an elastic force for reset to the pressing member after it has been pressed and moved; the valve cap is used to apply an elastic force for reset to the valve stem after it has been pressed and moved.

8. The suction valve according to claim 7, characterized in that, The first cap defines a buffer space between the first pressing head end of the valve stem and the second pressing head end of the pressing member, and the sealing member is housed in the buffer space, or the sealing member is disposed outside the buffer space.

9. A handle, characterized in that, Includes the suction valve according to any one of claims 1 to 8.

10. An endoscope, characterized in that, It includes an insertion part and a handle as described in claim 9, wherein the handle is connected to the insertion part.

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