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 comprises a valve body, a valve cap, a valve rod, a pressing piece and a connecting 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 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 connecting piece has an atmospheric flow channel and is movably arranged in the valve cavity to switch between a first state and a second state. When the connecting piece is in the first state, the connecting piece pushes away an elastic sealing structure on the side wall of the valve cap, and the valve cavity is connected with the outside through the atmospheric flow channel. When the connecting piece is in the second state, the connecting piece is separated from the elastic sealing structure. The pressing piece is movably arranged relative to the valve rod to drive the connecting piece to move when pressed. The above scheme can solve the problem that the atmospheric passage of the attraction valve is prone to remaining the sucked material in the related endoscope technology.

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 suction operation of an endoscope relies on a suction valve on its handle. Pressing the suction valve connects its suction channel to the negative pressure channel, enabling suction; releasing the pressure connects the suction valve's atmospheric channel to the negative pressure channel, thus shutting down the suction function. However, in practice, suction valves often retain aspirated material in their atmospheric channel, 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 connecting element, wherein: The valve cap is connected to the valve body, and the two define a valve cavity; the valve stem is connected to the valve cap, and is movable within the valve cavity to switch between a closed position and a suction position; The connector has a large airflow channel and is movably disposed within the valve cavity to switch between a first state and a second state. When the connector is in the first state, the connector pushes open the elastic sealing structure on the side wall of the valve cap, and the valve cavity is connected to the outside through the large airflow channel. When the connector is in the second state, the connector separates from the elastic sealing structure. The pressing member is movably disposed relative to the valve stem to drive the connecting member to move when pressed; a buffer stroke is provided between the pressing member and the valve stem, the buffer stroke being used to allow the pressing member to drive the connecting member to switch to the second state, 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 connecting element to be reset to the first state.

[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 connecting member is moved to close the atmospheric passage in advance. This ensures that the atmospheric passage is always kept closed during the process of the valve stem switching from the closed position to the suction position to open the suction passage. 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 caused by the opening of the atmospheric passage. This greatly reduces the amount of object being sucked that moves to the corresponding position of the atmospheric passage on the side wall of the valve cap, thus preventing the object being sucked from remaining or accumulating in the atmospheric passage.

[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] Thirdly, since the connecting part in the second state is separated from the elastic sealing structure, and the elastic sealing structure itself can achieve the sealing of the valve cap sidewall, the further compression of the elastic sealing structure by the valve cap under pressure deformation can enhance the sealing performance of the corresponding part of the elastic sealing structure on the valve cap sidewall, thereby achieving a better sealing effect.

[0012] Fourth, since the connector in the second state is separate from the elastic sealing structure, the connector will not cooperate with the valve cap side wall and hinder the deformation of the valve cap during the process of continuing to press the suction valve until the valve stem moves to the suction position. In other words, the valve cap can be allowed to deform smoothly during the pressure process of the suction valve, which facilitates the smooth pressing operation of the suction valve and optimizes the operator's operating feel. Attached Figure Description

[0013] 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.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the suction valve disclosed in some embodiments of this application; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the suction valve disclosed in some embodiments of this application from another perspective (hidden parts of the structure). Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 The following are schematic diagrams of the connecting parts disclosed in some embodiments of this application and cross-sectional views of the connecting parts along the XX direction; Figure 6 This is a longitudinal sectional view of the suction valve in the closed state and the connecting member in the first state as disclosed in some embodiments of this application; Figure 7 for Figure 6 A magnified view of a section at point C; Figure 8 This is a longitudinal sectional view of the suction valve in the closed state and the connecting member in the second state as disclosed in some embodiments of this application; Figure 9 for Figure 8 A magnified view of a section at point D; Figure 10 This is a schematic diagram of the valve cap disclosed in some embodiments of this application when the connector is in the second state (the valve cap is hidden). Figure 11 for Figure 10 A magnified view of a section at point E in the middle; Figure 12 This is a longitudinal sectional view of the suction valve in the open state as disclosed in some embodiments of this application; Figure 13 for Figure 12 A magnified view of a section at point F in the middle; Figure 14 This is a schematic diagram illustrating the cooperation principle between the connecting part and the valve cap during the reset process of the valve stem, as disclosed in some embodiments of this application. Figure 15 This is a schematic diagram illustrating the engagement between the connector and the valve cap during the reset process of the valve stem, as disclosed in some embodiments of this application.

[0015] 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-First cap body, 200a1-First snap-fit ​​protrusion, 200b-Second cap body, 200b1-Second snap-fit ​​protrusion, 210-Elastic sealing structure, 210a-Positioning recess, 211-Plug, 220-First reinforcing part, 230-Second reinforcing part, 240-Second guide surface, 250-Allowing groove. 300-Valve stem, 310-First pressing head end, 311-First slot, 320-First rod body, 321-Flow space, 322-First guide channel, 330-Blocking end, 340-Stop part, 350-Guide tube, 351-Second guide channel 400 - Pressing element, 410 - Second pressing head end, 411 - Second slot, 420 - Second rod body 500 - Connector, 510 - Large airflow channel, 520 - Air inlet, 530 - Air outlet, 540 - Pressure section 600-Traction line, 600a-Limit ball, 700-Third reset structure, 800 - First sealing body, 810 - Connecting port, 820 - First sealing protrusion 900 - Second sealing body, 910 - Second sealing protrusion, S-valve cavity. Detailed Implementation

[0016] 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.

[0017] 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.

[0018] 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. When aspiration is required, the operator presses the valve cap to switch the suction valve from the closed to the open state. At this point, the negative pressure suction acts on the material to be aspirated, allowing for smooth aspiration.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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 the pressing action, when the valve cap is first pressed, the valve stem has already released the seal on the aspiration passage, opening it. But pressing the valve cap and 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 valves perform aspiration operations while both the aspiration and atmospheric passages are open simultaneously.

[0023] 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.

[0024] In view of this, some embodiments of this application provide a suction valve for an endoscope.

[0025] 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.

[0026] Please see Figures 1-15 The suction valve provided in some embodiments of this application includes a valve body 100, a valve cap 200, a valve stem 300, a pressing member 400, and a connecting 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.

[0027] 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.

[0028] 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 sequentially drawn from the front end of the endoscope insertion section through the instrument channel and the suction channel 120 into the valve cavity S. The valve cavity S serves as a temporary storage chamber for the aspirated material, which is then aspirated into the negative pressure channel 110. Simultaneously, 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 .

[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 reset structures to achieve state switching, including the pressing component 400 and connecting component 500 of the suction valve disclosed in this application embodiment. Their specific reset principles 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 3 As shown, the suction valve may include a first sealing body 800 disposed within the valve cavity S. The first sealing body 800 is configured to seal against the negative pressure channel 110, and has a communication port 810 for connecting the valve cavity S and the negative pressure channel 110. Further, as... Figure 3 As shown, the first sealing body 800 has a first sealing protrusion 820 near the joint between the valve body 100 and the valve cap 200. The first sealing protrusion 820 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 900 disposed within the valve cavity S, the second sealing body 900 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 900 has a second sealing protrusion 910 that abuts against the side wall of the valve body 100 to enhance the sealing effect between the second sealing body 900 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 900 and the valve body 100.

[0033] In the embodiments of this application, the specific materials of the first sealing body 800 and the second sealing body 900 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 900, such as Figure 3 As shown, the sealing end 330 of the valve stem 300 can be sealed with the second sealing body 900 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 an 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 connector 500 is movably disposed within the valve cavity S to switch between a first state and a second state. It can be understood that when the connector 500 moves within the valve cavity S, its positional characteristics within the valve cavity S change, enabling it to cooperate with the valve cap 200 to switch the corresponding operating state. In the embodiments of this application, the connector 500 cooperates with the elastic sealing structure 210 on the side wall of the valve cap 200 to switch the operating state. Of course, the elastic sealing structure 210 is located on the movement path of the connector 500 to facilitate mutual cooperation when the connector 500 moves.

[0037] The state of the atmospheric passage of the suction valve differs depending on the operating state of the connector 500. In embodiments of this application, the connector 500 has a large airflow passage 510, which is used to construct the atmospheric passage of the suction valve.

[0038] In the first state, the connector 500 pushes open the elastic sealing structure 210 on the side wall of the valve cap 200, and connects the valve cavity S to the outside through the large airflow channel 510; in the second state, the connector 500 separates from the elastic sealing structure 210.

[0039] It is understandable that when the suction valve is closed, the negative pressure device associated with it is used to draw in atmospheric air to prevent excessive suction and damage to the internal structure of the suction valve. Correspondingly, as... Figures 1-3 and Figure 6 As shown, the connector 500 is in the first state, which can push the elastic sealing structure 210 open by pushing it against the elastic sealing structure 210 and insert it into the side wall of the valve cap 200. Thus, as... Figure 4 and Figure 7As shown, the air inlet 520 on the connector 500, which communicates with the large airflow channel 510, is exposed outside the valve cap 200, while the air outlet 530, which communicates with the large airflow channel 510, remains in the valve cavity S. Under the negative pressure of the negative pressure device, external air can be drawn into the valve cavity S sequentially through the air inlet 520, the large airflow channel 510, and the air outlet 530 of the connector 500, and then enter the negative pressure channel 110. See [link to details] for more information. Figure 6 The dashed arrows in the diagram show the corresponding suction path for external air. The air inlet 520, airflow channel 510, and air outlet 530 of the connector 500 constitute the atmospheric passage for the suction valve.

[0040] like Figures 8-11 As shown, the connector 500 is in the second state, separating from the elastic sealing structure 210 and releasing its pushing effect on the elastic sealing structure 210. In this way, the elastic sealing structure 210 rebounds and restores its deformation based on its own elasticity, achieving a seal on the side wall of the valve cap 200. At this time, the connector 500 is completely located within the valve cavity S, especially the air inlet 520 of the connector 500, which is located within the valve cavity S, preventing external air from entering the valve cavity S; that is, the atmospheric passage of the suction valve is closed. Under these conditions, the negative pressure action will no longer draw in external 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.

[0041] The pressing element 400 is movably disposed relative to the valve stem 300 to drive the connecting element 500 to move when pressure is applied. It can be understood that the pressing element 400 is used to receive pressure from the operator, and it is capable of movement under pressure, driving the connecting element 500 to switch from a first state to a second state, thereby matching the process of the suction valve switching from a closed state to an open state under pressure.

[0042] Note that in this embodiment, the pressing member 400 and the valve stem 300 can move relative to each other. That is, in some cases where the pressing member 400 is pressed and moves, the valve stem 300 can generally remain in its original position within the valve cavity S. The process of the pressing member 400 driving the connecting member 500 to move and switching from the first state to the second state corresponds to the process of the pressing member 400 moving relative to the valve stem 300. For details, please refer to the comparison. Figure 6 and Figure 8 .

[0043] 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 8 and Figure 12 .

[0044] 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 After the pressing member 400 drives the connecting member 500 to switch to the second state, it transmits the pressing action to the valve stem 300, which in turn drives the valve stem 300 to move from the closed position to the suction position.

[0045] It should be understood that the direction of pressure applied to the suction valve (which can be roughly referenced) Figure 6 (Hollow arrow in the image), the pressing element 400 has a pressing stroke that moves under pressing action 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 member 400 can drive the connecting member 500 to move until the connecting member 500 switches to the second state under the drive of the pressing member 400. At this time, the atmospheric passage of the suction valve is closed.

[0046] 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.

[0047] 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 several ways. For example, as... Figure 6 As shown, buffer stroke lThe distance between the first pressing head end 310 of the valve stem 300 and the second pressing head end 410 of the pressing member 400 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 first pressing head end 310 of the valve stem 300, thus transmitting the pressing force to the valve stem 300, thereby driving the valve stem 300 to move and open the suction channel 120. In other implementations, the pressing member 400 and the valve stem 300 can be interlocked, and the pressing force can be transmitted between them through the mutual abutment at the interlocking part.

[0048] With the suction valve open, the negative pressure applied by the negative pressure device is used to suction the material being drawn in. Please refer to... Figure 12 , Figure 12 The suction valve shown is in the open state. Since the connector 500 is in the second state, the atmospheric passage of the suction valve is closed, so the negative pressure will not draw in air from outside the suction valve. At this time, the valve stem 300 is in the suction position, meaning the suction channel 120 of the suction valve is open. The material to be suctioned from the body enters the valve chamber S sequentially through the instrument channel of the endoscope insertion part and the suction channel 120, and is then drawn into the negative pressure channel 110. See details in [link to documentation]. Figure 12 The dashed arrows in the diagram show the suction path of the corresponding sample.

[0049] like Figure 3 and Figure 12 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.

[0050] like Figure 3 and Figure 12 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.

[0051] 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 connecting element 500 to reset to the first state. 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 driving action on the connecting element 500, that is, releasing the restriction on the connecting element 500, so that the connecting element 500 can reset to the first state, opening the atmospheric passage of the suction valve. In this way, the negative pressure can draw in air through the air inlet 520, the large airflow channel 510, and the air outlet 530 on the connecting element 500, which can be referred to in sequence. Figure 12 and Figure 6 .

[0052] Based on the above analysis, it can be seen that the suction valve disclosed in this application embodiment can drive the valve stem 300 to move under the premise of pre-closing the atmospheric channel. This ensures that the atmospheric channel is always kept closed during the process of the valve stem 300 switching from the closed position to the suction position and opening 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 caused by the opening of the atmospheric channel. This can greatly reduce the amount of object being sucked that moves to the corresponding position of the atmospheric channel on the side wall of the valve cap 200, so as to prevent the object being sucked from remaining or accumulating in the atmospheric channel.

[0053] 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.

[0054] 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.

[0055] Furthermore, the existing technology closes the atmospheric passage 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, when the connector 500 is in the second state, the connector 500 is separated from the elastic sealing structure 210. The elastic sealing structure 210 itself can seal the side wall of the valve cap 200. At this time, combined with the deformation of the valve cap 200 under pressure, the part of the valve cap 200 corresponding to the elastic sealing structure 210 is further compressed on the basis of already being sealed, thereby strengthening the sealing performance of the area corresponding to the elastic sealing structure 210 on the side wall of the valve cap 200, and achieving a better sealing effect.

[0056] Furthermore, during the pressure process of the suction valve disclosed in this application, after the connecting member 500 switches from the first state to the second state, it separates from the elastic sealing structure 210. Then, during the process of continuing to press the suction valve until the valve stem 300 moves to the suction position, the connecting member 500 will not cooperate with the side wall of the valve cap 200 and hinder the deformation of the valve cap 200. That is, the valve cap 200 can be smoothly deformed during the pressure process of the suction valve, which facilitates the smooth pressing operation of the suction valve and optimizes the operator's operating feel.

[0057] Regarding the elastic sealing structure 210, the specific structure of this application embodiment is not limited.

[0058] For example, such as Figure 2 and Figure 11 As shown, the resilient sealing structure 210 includes at least two plugs 211 that are mutually sealingly engaged. The resilient sealing structure 210 is configured such that the plugs 211 separate from each other when pushed by the connector 500.

[0059] It is understood that in this layout, a separation slit is formed between the plug segments 211. When the plug segments 211 are pushed by the connecting member 500, the connecting member 500 can pass through the separation slit and open the elastic sealing structure 210. Of course, when the elastic sealing structure 210 springs back to its original position, the plug segments 211 at the corresponding separation slits seal against each other to keep the valve cavity S closed. In this embodiment, the elastic sealing structure 210 is set in the space where the side wall of the valve cap 200 is located, thereby improving the structural compactness and optimizing the layout.

[0060] For example, the valve cap 200 has a large air hole on its side wall that connects to the valve cavity S, and the elastic sealing structure 210 is a spring plate corresponding to the large air hole. The spring plate is pre-configured to press against the side wall of the valve cap 200 at the large air hole and to seal against it. When the spring plate is pushed by the connecting member 500, the spring plate is pushed open by the connecting member 500 that passes through the large air hole, and the valve cavity S is connected to the external atmosphere through the large airflow channel 510. In this embodiment, the structure of the elastic sealing structure 210 is simpler and easier to manufacture.

[0061] In the embodiments of this application, the specific movable configuration features of the connector 500 within the valve cavity S are not limited.

[0062] For example, such as Figures 6-11 As shown, the connector 500 is movably disposed along the radial direction of the suction valve, and the elastic sealing structure 210 is disposed on the circumferential sidewall of the valve cap 200, corresponding to the moving path of the connector 500. The radial direction of the suction valve can be understood as the direction perpendicular to its pressing direction.

[0063] It should be understood that the connecting member 500 switches its working state by moving, and the connecting member 500 has a travel distance in its moving direction. In this embodiment, the moving direction of the connecting member 500 is located in the radial direction of the suction valve. In this way, when the connecting member 500 moves, it utilizes the radial layout space of the suction valve, avoiding the space occupied by the pressing member 400 and valve stem 300 in the pressing direction, thereby avoiding interference. At the same time, this layout of the connecting member 500, by utilizing the radial layout space of the suction valve, also improves the utilization rate of the internal space of the suction valve.

[0064] For example, the connector 500 is movably disposed along the pressing direction of the suction valve, and the elastic sealing structure 210 is disposed on the side wall of the suction valve distributed along the pressing direction, corresponding to the moving path of the connector 500. Further, based on this embodiment, the connector 500 can also be fixedly connected to the pressing member 400, so that when the pressing member 400 is pressed and moved, it can directly drive the connector 500 to move along the pressing direction, thereby realizing state switching. This structural layout can reduce the transmission structure and simplify the internal structure of the suction valve. In the embodiment where the connector 500 is fixedly connected to the pressing member 400, the elastic sealing structure 210 can be disposed on the side wall of the valve cap 200 near the pressing side of the suction valve (e.g., Figure 3 The valve cap 200 sidewall on the upper side of the elastic sealing structure 210 is such that, during the pressing of the suction valve, the pressing member 400 can directly drive the connecting member 500 out of the elastic sealing structure 210.

[0065] It is worth noting that the pressing side of the suction valve refers to the side of the suction valve that is pressed during use.

[0066] In another embodiment, the connector 500 may also be configured in the valve cavity S in other active configurations such as rotation. For example, the rotational engagement configuration may be based on a lever structure.

[0067] It should be noted that, in order for the suction valve to function properly, its internal moving parts need to be able to reset after the pressing action is released, thus returning to the state before pressing. As mentioned earlier, the valve cap 200 provides an elastic reset force to the valve stem 300. Thus, the valve cap 200 or a portion thereof constitutes the first reset structure corresponding to the valve stem 300. In addition, the suction valve also includes a second reset structure corresponding to the pressing member 400 and a third reset structure 700 corresponding to the connecting member 500. The specific types of the second reset structure and the third reset structure 700 are not limited in the embodiments of this application; both can be helical telescopic springs or bent structural parts, etc.

[0068] During the process of the suction valve switching from a closed state to an open state under pressure, the pressing action is transmitted from the pressing side to the elastic sealing structure 210 through the side wall of the valve cap 200, such as... Figure 3 As shown, the pressing action is transmitted from top to bottom on the side wall of the valve cap 200. This results in greater internal force on the part of the elastic sealing structure 210 closer to the pressing side of the suction valve, while the internal force is smaller on the pressing side farther away from the suction valve. Over time, the part of the elastic sealing structure 210 closer to the pressing side of the suction valve is more likely to deform due to fatigue, and its elasticity will gradually decrease. During the process of the connecting piece 500 pushing against the elastic sealing structure 210, an uneven distribution of the reaction force of the elastic sealing structure 210 on the connecting piece 500 in the pressing direction is caused. This will make it difficult for the connecting piece 500 to switch to the first state and achieve smooth reset, which is also not conducive to the closing of the suction valve.

[0069] Based on this, in some embodiments of this application, such as Figure 8 and Figure 9 As shown, when the connector 500 is movably disposed along the radial direction of the suction valve, the portion of the side wall of the valve cap 200 corresponding to the elastic sealing structure 210 is inclined relative to the pressing direction, and the inclined direction is toward the valve cavity S.

[0070] Understandably, with this layout, the portion of the elastic sealing structure 210 closer to the pressing side of the suction valve in the pressing direction is shorter than the portion further away from the pressing side of the suction valve in the pressing direction. Furthermore, during the resetting process of the connecting member 500 and without contact with the elastic sealing structure 210, the distance between the pushing end of the connecting member 500 and the portion of the elastic sealing structure 210 closer to the pressing side of the suction valve in the pressing direction is smaller, while the distance between the pushing end of the connecting member 500 and the portion of the elastic sealing structure 210 further away from the pressing side of the suction valve in the pressing direction is larger.

[0071] During the resetting and extension of the connector 500, the portion of the elastic sealing structure 210 closer to the pressing side of the suction valve in the pressing direction will be pushed by the connector 500 before the portion farther away from the pressing side of the suction valve. Note that the timing of the push action of the connector 500 directly affects the wear of the connector 500 itself under the resetting action. That is, the earlier the portion of the elastic sealing structure 210 comes into contact with the connector 500, the less wear the connector 500 will suffer under the resetting action. Therefore, the portion of the elastic sealing structure 210 closer to the pressing side of the suction valve in the pressing direction will receive a greater push action from the connector 500. As the connector 500 extends, the deformation of the elastic sealing structure 210 gradually consumes the resetting action received by the connector 500. That is, the portion of the elastic sealing structure 210 farther away from the pressing side of the suction valve in the pressing direction will receive a gradually decreasing push action.

[0072] It is evident that the force application characteristics of the connecting member 500 on the elastic sealing structure 210 with the "tilted arrangement" feature in this embodiment precisely address the aforementioned technical problem, thereby improving the uneven distribution of the reaction force of the elastic sealing structure 210 on the connecting member 500 in the pressing direction. This facilitates a smoother transition of the connecting member 500 from the second state to the first state and enables it to reset, thereby closing the suction valve.

[0073] As mentioned above, after the suction valve is pressurized, the pressing member 400 moves relative to the valve stem 300, which drives the connecting member 500 to switch from the first state to the second state. In the embodiments of this application, there are various cooperation relationships between the pressing member 400, the valve stem 300, and the connecting member 500, and the embodiments of this application do not limit the specific cooperation relationship.

[0074] Please see Figure 3 and Figure 4 In some embodiments of this application, the valve stem 300 may include a first stem body 320 and a guide tube 350 disposed on the circumferential side of the first stem body 320. The first stem body 320 has a first guide channel 322. The pressing member 400 is inserted into the first guide channel 322 along its movable direction. The guide tube 350 has a second guide channel 351 communicating with the first guide channel 322. The second guide channel 351 extends radially along the suction valve. The connecting member 500 is movably disposed in the second guide channel 351. The suction valve also includes a traction line 600. The connecting member 500 is connected to the pressing member 400 through the traction line 600 passing through the first guide channel 322 and the second guide channel 351, so that when the pressing member 400 is pressed and moved, it is pulled by the traction line 600, thereby separating from the elastic sealing structure.

[0075] Understandably, in this layout, the first guide channel 322 provides accommodating space for at least a portion of the pressing member 400. Exemplarily, the second rod 420 of the pressing member 400 is inserted into the first guide channel 322. The wall of the first guide channel 322 can provide a certain radial limiting constraint on the pressing member 400, preventing radial deviation 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 application embodiment does not specifically limit this; exemplarily, the pressing member 400 can use the valve body 100 as the mounting base.

[0076] The guide tube 350 provides at least a portion of the accommodating space for the connector 500. When the connector 500 is movably disposed within the second guide channel 351, the wall of the second guide channel 351 provides a certain radial limiting constraint on the connector 500, preventing radial deviation and ensuring that the connector 500 moves radially along the suction valve. Since the guide tube 350 is part of the valve stem 300, the connector 500 uses the valve stem 300 as a movable mounting base. However, this embodiment does not impose specific limitations on this; for example, the connector 500 can use the valve body 100 as a mounting base.

[0077] The traction line 600 is used to transmit traction force between the pressing member 400 and the connecting member 500 to pull the connecting member 500 to move along the second guide channel 351.

[0078] like Figures 6-9 As shown, during the specific operation, the operator applies pressure to the suction valve, and the pressing element 400 moves along the first guide channel 322 under the pressing action. The traction line 600 gradually tightens and moves downward with the pressing element 400, while applying a radial traction force to the connecting element 500 along the suction valve. Under the pull of the traction line 600, the connecting element 500 gradually releases the pushing action on the elastic sealing structure 210 until it separates from the elastic sealing structure 210, thus switching the connecting element 500 from the first state to the second state.

[0079] Based on the flexibility of the traction cable 600, it can easily convert the movement of the pressing member 400 in the pressing direction into a traction force in the radial direction of the suction valve, eliminating the need for a complex transmission structure. Simultaneously, when tensioned, the traction cable 600 is distributed approximately along the extension direction of the second guide channel 351. Therefore, the direction of the traction force provided by the traction cable 600 roughly coincides with the preset movement direction of the connecting member 500. This reduces the loss of the driving force from the pressing member 400 to the connecting member 500 during transmission, improving driving efficiency. Furthermore, this also reduces the radial force on the connecting member 500, lowering its friction with the guide tube 350 wall, thereby improving the smoothness of its movement within the second guide channel 351.

[0080] To simplify the installation process, the traction cable 600 may include a limiting portion located on the side where it connects to the pressing member 400. During the movement of the pressing member 400, the traction cable 600 is engaged with the pressing member 400 in the pressing direction via the limiting portion, thereby tensioning the traction cable 600. Exemplarily, the limiting portion is a limiting ball 600a to avoid stress concentration. Exemplarily, the traction cable 600 may be of a type with a certain rigidity to facilitate its insertion into the pressing member 400.

[0081] In the above embodiment, during the pressing of the suction valve, the valve stem 300 moves within the valve cavity S. The valve stem 300 uses a guide tube 350 as the mounting base for the connector 500. Therefore, the guide tube 350 and connector 500 may interfere with related structures within the valve cavity S during their movement with the valve stem 300. Consequently, it is necessary to provide avoidance structures in these related structures to accommodate the guide tube 350 and / or connector 500. For example, such as... Figure 13 and Figure 15 As shown, the valve cap 200 has a clearance groove 250 on the internal structure of the valve cavity S for avoiding the guide tube 350 and / or the connector 500.

[0082] In another embodiment, at least one of the pressing member 400 and the connecting member 500 has a first guide surface at its engagement portion. The first guide surface is used to guide the connecting member 500 to retract when the pressing member 400 pushes against the connecting member 500. Of course, this embodiment does not limit the specific mounting base of the pressing member 400 and the connecting member 500. For example, both the pressing member 400 and the connecting member 500 use the valve stem 300 as the mounting base. Specifically, the pressing member 400 is inserted into the first guide channel 322, and the connecting member 500 is movably disposed along the second guide channel 351.

[0083] It is understood that in this embodiment, the connecting member 500 is located on the moving path of the pressing member 400. During the pressing member 400's movement under pressure, it abuts against the connecting member 500, transmitting the pressure to the connecting member 500. The first guide surface can change the direction of force applied at the joint between the pressing member 400 and the connecting member 500, so that the force on the connecting member 500 has a component distributed radially along the suction valve. Simultaneously, in conjunction with the limiting constraint effect of the second guide channel 351, the connecting member 500 is driven to retract radially along the suction valve, achieving a switch from the first state to the second state. This structural layout simplifies the transmission and engagement relationship between the pressing member 400 and the connecting member 500, and also eliminates the need for a complex transmission structure.

[0084] The first guiding surface can be a guiding slope, a guiding arc, or other surface shapes.

[0085] like Figure 5 , Figure 7 and Figure 9 As shown, in the aforementioned embodiment including the guide tube 350, the third reset structure 700 can be placed within the second guide channel 351 inside the guide tube 350, and the pressing portion 540 of the connector 500 cooperates with the third reset structure 700 to press against the third reset structure 700 during the process of the connector 500 switching from the first state to the second state. The third reset structure 700 is compressed and stores energy to apply a driving force for reset to the connector 500. Exemplarily, when the connector 500 is a connecting rod, the pressing portion 540 can be arranged around the circumference of the connecting rod to improve the force balance, thereby optimizing the force cooperation relationship between the third reset structure 700, the connector 500, and the pressing member 400. Specifically, if the third reset structure 700 is a helical telescopic spring, the helical telescopic spring can be sleeved around the circumference of the main body of the connector 500 and abut against the pressing portion 540.

[0086] As described above, the connector 500 is used to construct the atmospheric passage of the suction valve, and the embodiments of this application do not limit the specific structure of the connector 500. Exemplarily, the connector 500 can typically be a connecting rod, which facilitates spatial arrangement in the valve cavity S, with the air inlet 520 and air outlet 530 of the connecting rod located at its two ends in the axial direction, respectively.

[0087] In another embodiment, please refer to Figures 3-7 The connector 500 is a connecting rod, the large airflow channel 510 extends along the axial direction of the connecting rod, the air outlet 530 of the connecting rod is opened on its circumferential side, and the traction line 600 is connected to the end of the connecting rod away from its pushing end.

[0088] With this layout, the air outlet 530 located on the circumferential side of the connecting rod can discharge the air drawn in through the large airflow channel 510 from the side of the connecting rod. This facilitates the cooperation with the guide tube 350 and avoids the situation where the air outlet 530 is located inside the guide tube 350, making it difficult to achieve negative pressure suction. In addition, because the air outlet 530 is located on the circumferential side of the connecting rod, it provides a larger layout space for the connecting rod at the end away from the pushing end, making it easier to connect the traction line 600 to this end. It is particularly preferable to connect it to the middle of the end face of this end. In this way, the traction force applied by the traction line 600 to the connecting rod can be distributed approximately along the axial direction of the connecting rod, preventing the connecting rod from deviating within the guide tube 350 and causing large frictional losses.

[0089] Please see Figures 3-7 In some embodiments of this application, the first end of the traction line 600 is connected to the middle portion of the end face of the pressing member 400 opposite to its pressing side, and the portion of the traction line 600 near its first end passes through the pressing member 400 along its axial direction. Specifically, when the traction line 600 includes a limiting portion, the limiting portion can be limited and engaged with the middle portion of the end face of the pressing member 400 opposite to its pressing side.

[0090] With this arrangement, during the process of pulling the connecting member 500 by driving the traction line 600 through the pressing member 400, since the portion of the traction line 600 near its first end is distributed along the axial direction of the pressing member 400, the reaction force it exerts on the pressing member 400 is also roughly distributed along the axial direction of the pressing member 400. This helps prevent the pressing member 400 from deviating within the first guide channel 322, thereby improving the smoothness of the movement of the pressing member 400 relative to the valve stem 300. By preventing the pressing member 400 from deviating, the frictional loss between the pressing member 400 and the wall of the first guide channel 322 is reduced. This allows for a higher efficiency in transmitting the pulling force applied to the connecting member 500 through the traction line 600, facilitating the switching of the connecting member 500's state.

[0091] Please see Figure 1 , Figure 2 and Figure 4 In some embodiments of this application, the sidewall of the valve cap 200 has a first reinforcing portion 220 corresponding to the elastic sealing structure 210, and the first reinforcing portion 220 is arranged circumferentially around the elastic sealing structure 210. It is understood that during the pressing of the suction valve, the valve cap 200 will be deformed by pressure, and the wrinkles formed on the sidewall due to the deformation will affect the elastic sealing structure 210. Especially when the connector 500 is in the second state, that is, separated from the elastic sealing structure 210, the wrinkles on the sidewall of the valve cap 200 may cause the sealing performance of the elastic sealing structure 210 to deteriorate. For example, the plugs 211 of the elastic sealing structure 210 may separate from each other and fail to seal.

[0092] To address this, the first reinforcing part 220 in this embodiment is a reinforcing structure disposed circumferentially around the elastic sealing structure 210. It provides structural reinforcement near the elastic sealing structure 210, effectively forming a barrier around the elastic sealing structure 210 to resist deformation of the valve cap 200. This reduces the deformation amplitude of the elastic sealing structure 210 or even prevents deformation, thereby ensuring the sealing performance of the elastic sealing structure 210. Furthermore, since the first reinforcing part 220 is disposed circumferentially to form a closed-loop integral structure, this further increases the cross-sectional area of ​​the first reinforcing part 220, thereby improving the stiffness of the first reinforcing part 220 and its surrounding area, thus mitigating the impact of valve cap 200 deformation.

[0093] Please see Figures 1-3 In some embodiments of this application, the sidewall of the valve cap 200 has a second reinforcing portion 230 disposed along at least a portion of the circumference of the valve cap 200, and the elastic sealing structure 210 is located on the extension path of the second reinforcing portion 230. With this arrangement, the second reinforcing portion 230 can provide structural reinforcement to the corresponding location of the elastic sealing structure 210. Simultaneously, since the second reinforcing portion 230 is distributed circumferentially along the valve cap 200, the extended area of ​​the second reinforcing portion 230 becomes part of the reinforcing structure. This increases the cross-sectional area of ​​the reinforcing structure, thereby improving the stiffness of the second reinforcing portion 230 and its surrounding area. This mitigates the impact of valve cap 200 deformation on the elastic sealing structure 210, ensuring that the elastic sealing structure 210 maintains good sealing performance even when the valve cap 200 is under pressure.

[0094] Furthermore, such as Figure 1 , Figure 2 and Figure 4 As shown, the first reinforcing part 220 and / or the second reinforcing part 230 can be provided on both the inner and outer surfaces of the valve cap 200 to further enhance the reinforcing effect of the corresponding elastic sealing structure 210 area. Furthermore, the reinforcing structures (i.e., the first reinforcing part 220 and / or the second reinforcing part 230) on the inner and outer surfaces of the valve cap 200 are correspondingly provided along the radial direction of the suction valve. This further increases the cross-sectional area of ​​the reinforcing structure to improve rigidity, thereby preventing the elastic sealing structure 210 from being affected by the deformation of the valve cap 200.

[0095] Furthermore, the first reinforcing part 220 and the second reinforcing part 230 can be connected to further enhance the overall strength and rigidity, thereby further reducing the impact of the deformation of the valve cap 200 on the elastic sealing structure 210.

[0096] In embodiments where the connector 500 is radially movable along the suction valve, the connector 500 may be obstructed during resetting, preventing it from smoothly engaging with the resilient sealing structure 210. For example, in... Figures 12-14 In this embodiment, the connector 500 moves with the valve stem 300. As the pressing action is released, the third reset structure 700 drives the connector 500 to switch from the second state to the first state. The connector 500 extends and abuts against the inner surface of the side wall of the valve cap 200, moving upwards (e.g., Figure 14 (As indicated by the dashed arrow) During the movement, it will be obstructed by the first reinforcing part 220, making it difficult to slide to the position corresponding to the elastic sealing structure 210. For example, the connecting member 500 can also be movably disposed on the valve body 100, and it does not move with the valve stem 300. After the suction valve is pressed, the valve cap 200 deforms, which may cause the elastic sealing structure 210 to be located under the connecting member 500. After the pressing action is released, the valve cap 200 returns to its deformation, and the connecting member 500 moves downward, but there may also be a situation where the movement is obstructed.

[0097] Based on this, in some embodiments of this application, such as Figure 15 As shown, when the valve cap 200 has a first reinforcing portion 220 on its side wall, the valve cap 200 also includes a second guide surface 240 provided on the first reinforcing portion 220. The second guide surface 240 is used to guide the connector 500 to slide to the position corresponding to the elastic sealing structure 210. With this arrangement, after the pressing action on the suction valve is released, the pushing end of the connector 500 can slide smoothly into the position corresponding to the elastic sealing structure 210 along the second guide surface 240, so as to facilitate the connector 500 to smoothly push open the elastic sealing structure 210 and switch to the first state. Of course, the second guide surface 240 needs to be provided on the movement path of the connector 500 during the reset process.

[0098] Please see Figure 9 In some embodiments of this application, the elastic sealing structure 210 includes a positioning recess 210a disposed in its central region, the positioning recess 210a being used to position and engage with the connector 500 when the connector 500 is reset.

[0099] It is understandable that the positioning recess 210a, as a recessed structure, can accommodate the pressing end of the connector 500 during the resetting process of the connector 500, allowing the connector 500 to quickly locate the pressing part 540. Simultaneously, since the positioning recess 210a is located in the middle of the elastic sealing structure 210, when the connector 500 applies pressure to the elastic sealing structure 210 at the positioning recess 210a, the force on the elastic sealing structure 210 is relatively balanced, facilitating its push-open by the connector 500 and ensuring that the connector 500 can smoothly switch from the second state to the first state. Furthermore, when the pushing end of the connector 500 abuts against the positioning recess 210a, the portion of the elastic sealing structure 210 surrounding the positioning recess 210a acts as a radial limit for the connector 500, preventing the connector 500 from sliding out of the positioning recess 210a and improving the force stability of the connector 500 during the pressing process.

[0100] 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 connecting piece 500 switches from the first state to the second state, 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.

[0101] Exemplarily, 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. The first reset structure may be a valve cap 200 or a portion thereof (e.g., the second cap 200b described later). Exemplarily, the second reset structure may be the first cap 200a described later or an elastic reset member.

[0102] 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.

[0103] In this configuration, during the initial stage of the suction valve operation, a relatively small pressing action is sufficient to move the pressing element 400 and cause the connecting element 500 to switch states. However, 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 precise structural configuration, after the pressing element 400 has driven the connecting element 500 to switch states, a further increase in pressing action will cause the valve stem 300 to move and release the blockage of the suction channel 120.

[0104] 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 .

[0105] 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 quickly and close the suction channel 120 in the first time. 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, so the connecting member 500 will not be released in the first time. In this way, it can be ensured that after the suction channel 120 is closed, the connecting member 500 switches from the second state to the first state to open 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.

[0106] 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 .

[0107] 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 connecting component 500 to complete the state switch before it abuts against the valve stem 300 and transmits the pressing action to the valve stem 300.

[0108] 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.

[0109] For example, such as Figure 3 and Figure 6 As shown, the valve cap 200 includes a first cap body 200a and a second cap body 200b arranged sequentially along the pressing direction of the suction valve. The first cap body 200a 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 200b 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.

[0110] With this arrangement, when the valve cap 200 is not pressed, the first cap body 200a 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 200a is the aforementioned second reset structure; the second cap 200b supports the valve stem 300 so that the valve stem 300 blocks the suction channel 120, meaning the second cap 200b is the aforementioned first reset structure. Compared to the second cap 200b, the first cap 200a is located closer to the pressing side of the suction valve, so that when the suction valve is pressed, a pressing action can be applied to the pressing member 400 and the first cap 200a. 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.

[0111] Please see Figure 4 and Figure 6 To facilitate the assembly of the valve cap 200 with the pressing member 400 and the valve stem 300, the first cap body 200a may be provided with a first snap-fit ​​protrusion 200a1, and the second pressing head end 410 of the pressing member 400 may be provided with a second snap-fit ​​groove 411. The first snap-fit ​​protrusion 200a1 and the second snap-fit ​​groove 411 are snap-fitted together in the pressing direction of the suction valve; the second cap body 200b may be provided with a second snap-fit ​​protrusion 200b1, and the first pressing head end 310 of the valve stem 300 may be provided with a first snap-fit ​​groove 311. The second snap-fit ​​protrusion 200b1 and the first snap-fit ​​groove 311 are snap-fitted together in the pressing direction of the suction valve.

[0112] 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.

[0113] Exemplarily, the suction valve further includes 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 elastic reset member is the second reset structure. Specifically, the elastic reset member may be disposed within the valve stem 300; exemplaryly, the elastic reset member is disposed within the first guide channel 322.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] The above description is merely an embodiment of this application and is not intended to limit the scope of 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 principles 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 connecting element, wherein: The valve cap is connected to the valve body, and the two define a valve cavity; the valve stem is connected to the valve cap, and is movable within the valve cavity to switch between a closed position and a suction position; The connector has a large airflow channel and is movably disposed within the valve cavity to switch between a first state and a second state. When the connector is in the first state, the connector pushes open the elastic sealing structure on the valve cap sidewall, thereby connecting the valve cavity to the outside through the large airflow channel. When the connector is in the second state, the connector separates from the elastic sealing structure, and the elastic sealing structure seals the valve cap sidewall. The pressing member is movably disposed relative to the valve stem to drive the connecting member to move when pressed; a buffer stroke is provided between the pressing member and the valve stem, the buffer stroke being used to allow the pressing member to drive the connecting member to switch to the second state, 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 connecting element to be reset to the first state.

2. The suction valve according to claim 1, characterized in that, The connector is movably disposed along the radial direction of the suction valve, and the elastic sealing structure is disposed on the circumferential sidewall of the valve cap; or, the connector is movably disposed along the pressing direction of the suction valve, and the elastic sealing structure is disposed on the sidewall of the suction valve distributed along the pressing direction.

3. The suction valve according to claim 2, characterized in that, When the connector is radially movable along the suction valve, the portion of the valve cap's sidewall corresponding to the elastic sealing structure is inclined relative to the pressing direction, and the inclination direction is towards the valve cavity.

4. The suction valve according to claim 2, characterized in that, The valve stem includes a first rod body and a guide tube disposed on the circumferential side of the first rod body. The first rod body has a first guide channel. The pressing member is inserted into the first guide channel along its movable direction. The guide tube has a second guide channel communicating with the first guide channel. The second guide channel extends radially along the suction valve. The connecting member is movably disposed in the second guide channel. Wherein: The suction valve also includes a traction line. The connector is connected to the pressing member by the traction line passing through the first guide channel and the second guide channel, so that the pressing member is pulled by the traction line when it is pressed and moved, thereby separating it from the elastic sealing structure. Alternatively, at least one of the pressing member and the connecting member may have a first guide surface at its joint portion, the first guide surface being used to guide the connecting member to retract when the pressing member pushes against the connecting member.

5. The suction valve according to claim 4, characterized in that, The connecting component is a connecting rod, the large airflow channel extends along the axial direction of the connecting rod, the air outlet of the connecting rod is opened on its circumferential side, and the traction line is connected to one end of the connecting rod away from its pushing end. And / or, the first end of the traction line is connected to the middle of the end face of the pressing member away from its pressing side, and the portion of the traction line near its first end passes through the pressing member along the axial direction of the pressing member.

6. The suction valve according to any one of claims 1 to 5, characterized in that, The side wall of the valve cap has a first reinforcing part corresponding to the elastic sealing structure, and the first reinforcing part is arranged around the elastic sealing structure in the circumferential direction. And / or, the sidewall of the valve cap has a second reinforcement portion disposed at least partially circumferentially along the valve cap, and the resilient sealing structure is located on the extension path of the second reinforcement portion; And / or, the resilient sealing structure includes at least two plug flaps that are mutually sealingly engaged, the resilient sealing structure being configured such that, in the event of a pushing action by the connector, the plug flaps separate from each other; And / or, the resilient sealing structure includes a positioning recess in its central region, the positioning recess being used to position and engage with the connector when the connector is reset; 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 claim 6, characterized in that, When the valve cap has the first reinforcing portion on its side wall, the valve cap further includes a second guide surface disposed on the first reinforcing portion, the second guide surface being used to guide the connector to slide to a position corresponding to the elastic sealing structure.

8. The suction valve according to any one of claims 1 to 5, 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.

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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